diff options
Diffstat (limited to 'malloc')
| -rw-r--r-- | malloc/arena.c | 791 | ||||
| -rw-r--r-- | malloc/hooks.c | 648 | ||||
| -rw-r--r-- | malloc/malloc.c | 4283 | ||||
| -rw-r--r-- | malloc/malloc.h | 53 | ||||
| -rw-r--r-- | malloc/mallocbug.c | 18 | ||||
| -rw-r--r-- | malloc/mcheck.c | 99 | ||||
| -rw-r--r-- | malloc/mcheck.h | 21 | ||||
| -rw-r--r-- | malloc/memusage.c | 430 | ||||
| -rw-r--r-- | malloc/memusagestat.c | 346 | ||||
| -rw-r--r-- | malloc/morecore.c | 17 | ||||
| -rw-r--r-- | malloc/mtrace.c | 183 | ||||
| -rw-r--r-- | malloc/obstack.c | 145 | ||||
| -rw-r--r-- | malloc/obstack.h | 678 | ||||
| -rw-r--r-- | malloc/set-freeres.c | 8 | ||||
| -rw-r--r-- | malloc/tst-mallocstate.c | 14 | ||||
| -rw-r--r-- | malloc/tst-mtrace.c | 12 | ||||
| -rw-r--r-- | malloc/tst-realloc.c | 12 |
17 files changed, 4004 insertions, 3754 deletions
diff --git a/malloc/arena.c b/malloc/arena.c index 5beb13d..5088a25 100644 --- a/malloc/arena.c +++ b/malloc/arena.c @@ -21,12 +21,12 @@ /* Compile-time constants. */ -#define HEAP_MIN_SIZE (32*1024) +#define HEAP_MIN_SIZE (32 * 1024) #ifndef HEAP_MAX_SIZE # ifdef DEFAULT_MMAP_THRESHOLD_MAX # define HEAP_MAX_SIZE (2 * DEFAULT_MMAP_THRESHOLD_MAX) # else -# define HEAP_MAX_SIZE (1024*1024) /* must be a power of two */ +# define HEAP_MAX_SIZE (1024 * 1024) /* must be a power of two */ # endif #endif @@ -39,7 +39,7 @@ #ifndef THREAD_STATS -#define THREAD_STATS 0 +# define THREAD_STATS 0 #endif /* If THREAD_STATS is non-zero, some statistics on mutex locking are @@ -53,12 +53,13 @@ malloc_chunks. It is allocated with mmap() and always starts at an address aligned to HEAP_MAX_SIZE. */ -typedef struct _heap_info { +typedef struct _heap_info +{ mstate ar_ptr; /* Arena for this heap. */ struct _heap_info *prev; /* Previous heap. */ size_t size; /* Current size in bytes. */ - size_t mprotect_size; /* Size in bytes that has been mprotected - PROT_READ|PROT_WRITE. */ + size_t mprotect_size; /* Size in bytes that has been mprotected + PROT_READ|PROT_WRITE. */ /* Make sure the following data is properly aligned, particularly that sizeof (heap_info) + 2 * SIZE_SZ is a multiple of MALLOC_ALIGNMENT. */ @@ -68,8 +69,8 @@ typedef struct _heap_info { /* Get a compile-time error if the heap_info padding is not correct to make alignment work as expected in sYSMALLOc. */ extern int sanity_check_heap_info_alignment[(sizeof (heap_info) - + 2 * SIZE_SZ) % MALLOC_ALIGNMENT - ? -1 : 1]; + + 2 * SIZE_SZ) % MALLOC_ALIGNMENT + ? -1 : 1]; /* Thread specific data */ @@ -80,9 +81,9 @@ static mstate free_list; #if THREAD_STATS static int stat_n_heaps; -#define THREAD_STAT(x) x +# define THREAD_STAT(x) x #else -#define THREAD_STAT(x) do ; while(0) +# define THREAD_STAT(x) do ; while (0) #endif /* Mapped memory in non-main arenas (reliable only for NO_THREADS). */ @@ -103,28 +104,28 @@ int __malloc_initialized = -1; in the new arena. */ #define arena_get(ptr, size) do { \ - arena_lookup(ptr); \ - arena_lock(ptr, size); \ -} while(0) + arena_lookup (ptr); \ + arena_lock (ptr, size); \ + } while (0) #define arena_lookup(ptr) do { \ - void *vptr = NULL; \ - ptr = (mstate)tsd_getspecific(arena_key, vptr); \ -} while(0) + void *vptr = NULL; \ + ptr = (mstate) tsd_getspecific (arena_key, vptr); \ + } while (0) -# define arena_lock(ptr, size) do { \ - if(ptr) \ - (void)mutex_lock(&ptr->mutex); \ - else \ - ptr = arena_get2(ptr, (size), NULL); \ -} while(0) +#define arena_lock(ptr, size) do { \ + if (ptr) \ + (void) mutex_lock (&ptr->mutex); \ + else \ + ptr = arena_get2 (ptr, (size), NULL); \ + } while (0) /* find the heap and corresponding arena for a given ptr */ #define heap_for_ptr(ptr) \ - ((heap_info *)((unsigned long)(ptr) & ~(HEAP_MAX_SIZE-1))) + ((heap_info *) ((unsigned long) (ptr) & ~(HEAP_MAX_SIZE - 1))) #define arena_for_chunk(ptr) \ - (chunk_non_main_arena(ptr) ? heap_for_ptr(ptr)->ar_ptr : &main_arena) + (chunk_non_main_arena (ptr) ? heap_for_ptr (ptr)->ar_ptr : &main_arena) /**************************************************************************/ @@ -133,51 +134,58 @@ int __malloc_initialized = -1; /* atfork support. */ -static void *(*save_malloc_hook) (size_t __size, const void *); +static void *(*save_malloc_hook)(size_t __size, const void *); static void (*save_free_hook) (void *__ptr, const void *); static void *save_arena; -#ifdef ATFORK_MEM +# ifdef ATFORK_MEM ATFORK_MEM; -#endif +# endif /* Magic value for the thread-specific arena pointer when malloc_atfork() is in use. */ -#define ATFORK_ARENA_PTR ((void*)-1) +# define ATFORK_ARENA_PTR ((void *) -1) /* The following hooks are used while the `atfork' handling mechanism is active. */ -static void* -malloc_atfork(size_t sz, const void *caller) +static void * +malloc_atfork (size_t sz, const void *caller) { void *vptr = NULL; void *victim; - tsd_getspecific(arena_key, vptr); - if(vptr == ATFORK_ARENA_PTR) { - /* We are the only thread that may allocate at all. */ - if(save_malloc_hook != malloc_check) { - return _int_malloc(&main_arena, sz); - } else { - if(top_check()<0) - return 0; - victim = _int_malloc(&main_arena, sz+1); - return mem2mem_check(victim, sz); + tsd_getspecific (arena_key, vptr); + if (vptr == ATFORK_ARENA_PTR) + { + /* We are the only thread that may allocate at all. */ + if (save_malloc_hook != malloc_check) + { + return _int_malloc (&main_arena, sz); + } + else + { + if (top_check () < 0) + return 0; + + victim = _int_malloc (&main_arena, sz + 1); + return mem2mem_check (victim, sz); + } + } + else + { + /* Suspend the thread until the `atfork' handlers have completed. + By that time, the hooks will have been reset as well, so that + mALLOc() can be used again. */ + (void) mutex_lock (&list_lock); + (void) mutex_unlock (&list_lock); + return __libc_malloc (sz); } - } else { - /* Suspend the thread until the `atfork' handlers have completed. - By that time, the hooks will have been reset as well, so that - mALLOc() can be used again. */ - (void)mutex_lock(&list_lock); - (void)mutex_unlock(&list_lock); - return __libc_malloc(sz); - } } static void -free_atfork(void* mem, const void *caller) +free_atfork (void *mem, const void *caller) { void *vptr = NULL; mstate ar_ptr; @@ -186,17 +194,17 @@ free_atfork(void* mem, const void *caller) if (mem == 0) /* free(0) has no effect */ return; - p = mem2chunk(mem); /* do not bother to replicate free_check here */ + p = mem2chunk (mem); /* do not bother to replicate free_check here */ - if (chunk_is_mmapped(p)) /* release mmapped memory. */ - { - munmap_chunk(p); - return; - } + if (chunk_is_mmapped (p)) /* release mmapped memory. */ + { + munmap_chunk (p); + return; + } - ar_ptr = arena_for_chunk(p); - tsd_getspecific(arena_key, vptr); - _int_free(ar_ptr, p, vptr == ATFORK_ARENA_PTR); + ar_ptr = arena_for_chunk (p); + tsd_getspecific (arena_key, vptr); + _int_free (ar_ptr, p, vptr == ATFORK_ARENA_PTR); } @@ -214,33 +222,36 @@ ptmalloc_lock_all (void) { mstate ar_ptr; - if(__malloc_initialized < 1) + if (__malloc_initialized < 1) return; - if (mutex_trylock(&list_lock)) + + if (mutex_trylock (&list_lock)) { void *my_arena; - tsd_getspecific(arena_key, my_arena); + tsd_getspecific (arena_key, my_arena); if (my_arena == ATFORK_ARENA_PTR) - /* This is the same thread which already locks the global list. - Just bump the counter. */ - goto out; + /* This is the same thread which already locks the global list. + Just bump the counter. */ + goto out; /* This thread has to wait its turn. */ - (void)mutex_lock(&list_lock); + (void) mutex_lock (&list_lock); + } + for (ar_ptr = &main_arena;; ) + { + (void) mutex_lock (&ar_ptr->mutex); + ar_ptr = ar_ptr->next; + if (ar_ptr == &main_arena) + break; } - for(ar_ptr = &main_arena;;) { - (void)mutex_lock(&ar_ptr->mutex); - ar_ptr = ar_ptr->next; - if(ar_ptr == &main_arena) break; - } save_malloc_hook = __malloc_hook; save_free_hook = __free_hook; __malloc_hook = malloc_atfork; __free_hook = free_atfork; /* Only the current thread may perform malloc/free calls now. */ - tsd_getspecific(arena_key, save_arena); - tsd_setspecific(arena_key, ATFORK_ARENA_PTR); - out: + tsd_getspecific (arena_key, save_arena); + tsd_setspecific (arena_key, ATFORK_ARENA_PTR); +out: ++atfork_recursive_cntr; } @@ -249,19 +260,23 @@ ptmalloc_unlock_all (void) { mstate ar_ptr; - if(__malloc_initialized < 1) + if (__malloc_initialized < 1) return; + if (--atfork_recursive_cntr != 0) return; - tsd_setspecific(arena_key, save_arena); + + tsd_setspecific (arena_key, save_arena); __malloc_hook = save_malloc_hook; __free_hook = save_free_hook; - for(ar_ptr = &main_arena;;) { - (void)mutex_unlock(&ar_ptr->mutex); - ar_ptr = ar_ptr->next; - if(ar_ptr == &main_arena) break; - } - (void)mutex_unlock(&list_lock); + for (ar_ptr = &main_arena;; ) + { + (void) mutex_unlock (&ar_ptr->mutex); + ar_ptr = ar_ptr->next; + if (ar_ptr == &main_arena) + break; + } + (void) mutex_unlock (&list_lock); } # ifdef __linux__ @@ -276,31 +291,33 @@ ptmalloc_unlock_all2 (void) { mstate ar_ptr; - if(__malloc_initialized < 1) + if (__malloc_initialized < 1) return; - tsd_setspecific(arena_key, save_arena); + + tsd_setspecific (arena_key, save_arena); __malloc_hook = save_malloc_hook; __free_hook = save_free_hook; free_list = NULL; - for(ar_ptr = &main_arena;;) { - mutex_init(&ar_ptr->mutex); - if (ar_ptr != save_arena) { - ar_ptr->next_free = free_list; - free_list = ar_ptr; + for (ar_ptr = &main_arena;; ) + { + mutex_init (&ar_ptr->mutex); + if (ar_ptr != save_arena) + { + ar_ptr->next_free = free_list; + free_list = ar_ptr; + } + ar_ptr = ar_ptr->next; + if (ar_ptr == &main_arena) + break; } - ar_ptr = ar_ptr->next; - if(ar_ptr == &main_arena) break; - } - mutex_init(&list_lock); + mutex_init (&list_lock); atfork_recursive_cntr = 0; } # else # define ptmalloc_unlock_all2 ptmalloc_unlock_all - # endif - #endif /* !NO_THREADS */ /* Initialization routine. */ @@ -317,20 +334,20 @@ next_env_entry (char ***position) while (*current != NULL) { if (__builtin_expect ((*current)[0] == 'M', 0) - && (*current)[1] == 'A' - && (*current)[2] == 'L' - && (*current)[3] == 'L' - && (*current)[4] == 'O' - && (*current)[5] == 'C' - && (*current)[6] == '_') - { - result = &(*current)[7]; + && (*current)[1] == 'A' + && (*current)[2] == 'L' + && (*current)[3] == 'L' + && (*current)[4] == 'O' + && (*current)[5] == 'C' + && (*current)[6] == '_') + { + result = &(*current)[7]; - /* Save current position for next visit. */ - *position = ++current; + /* Save current position for next visit. */ + *position = ++current; - break; - } + break; + } ++current; } @@ -353,7 +370,9 @@ libc_hidden_proto (_dl_open_hook); static void ptmalloc_init (void) { - if(__malloc_initialized >= 0) return; + if (__malloc_initialized >= 0) + return; + __malloc_initialized = 0; #ifdef SHARED @@ -364,13 +383,13 @@ ptmalloc_init (void) if (_dl_open_hook != NULL || (_dl_addr (ptmalloc_init, &di, &l, NULL) != 0 - && l->l_ns != LM_ID_BASE)) + && l->l_ns != LM_ID_BASE)) __morecore = __failing_morecore; #endif - tsd_key_create(&arena_key, NULL); - tsd_setspecific(arena_key, (void *)&main_arena); - thread_atfork(ptmalloc_lock_all, ptmalloc_unlock_all, ptmalloc_unlock_all2); + tsd_key_create (&arena_key, NULL); + tsd_setspecific (arena_key, (void *) &main_arena); + thread_atfork (ptmalloc_lock_all, ptmalloc_unlock_all, ptmalloc_unlock_all2); const char *s = NULL; if (__builtin_expect (_environ != NULL, 1)) { @@ -378,66 +397,67 @@ ptmalloc_init (void) char *envline; while (__builtin_expect ((envline = next_env_entry (&runp)) != NULL, - 0)) - { - size_t len = strcspn (envline, "="); - - if (envline[len] != '=') - /* This is a "MALLOC_" variable at the end of the string - without a '=' character. Ignore it since otherwise we - will access invalid memory below. */ - continue; - - switch (len) - { - case 6: - if (memcmp (envline, "CHECK_", 6) == 0) - s = &envline[7]; - break; - case 8: - if (! __builtin_expect (__libc_enable_secure, 0)) - { - if (memcmp (envline, "TOP_PAD_", 8) == 0) - __libc_mallopt(M_TOP_PAD, atoi(&envline[9])); - else if (memcmp (envline, "PERTURB_", 8) == 0) - __libc_mallopt(M_PERTURB, atoi(&envline[9])); - } - break; - case 9: - if (! __builtin_expect (__libc_enable_secure, 0)) - { - if (memcmp (envline, "MMAP_MAX_", 9) == 0) - __libc_mallopt(M_MMAP_MAX, atoi(&envline[10])); - else if (memcmp (envline, "ARENA_MAX", 9) == 0) - __libc_mallopt(M_ARENA_MAX, atoi(&envline[10])); - } - break; - case 10: - if (! __builtin_expect (__libc_enable_secure, 0)) - { - if (memcmp (envline, "ARENA_TEST", 10) == 0) - __libc_mallopt(M_ARENA_TEST, atoi(&envline[11])); - } - break; - case 15: - if (! __builtin_expect (__libc_enable_secure, 0)) - { - if (memcmp (envline, "TRIM_THRESHOLD_", 15) == 0) - __libc_mallopt(M_TRIM_THRESHOLD, atoi(&envline[16])); - else if (memcmp (envline, "MMAP_THRESHOLD_", 15) == 0) - __libc_mallopt(M_MMAP_THRESHOLD, atoi(&envline[16])); - } - break; - default: - break; - } - } + 0)) + { + size_t len = strcspn (envline, "="); + + if (envline[len] != '=') + /* This is a "MALLOC_" variable at the end of the string + without a '=' character. Ignore it since otherwise we + will access invalid memory below. */ + continue; + + switch (len) + { + case 6: + if (memcmp (envline, "CHECK_", 6) == 0) + s = &envline[7]; + break; + case 8: + if (!__builtin_expect (__libc_enable_secure, 0)) + { + if (memcmp (envline, "TOP_PAD_", 8) == 0) + __libc_mallopt (M_TOP_PAD, atoi (&envline[9])); + else if (memcmp (envline, "PERTURB_", 8) == 0) + __libc_mallopt (M_PERTURB, atoi (&envline[9])); + } + break; + case 9: + if (!__builtin_expect (__libc_enable_secure, 0)) + { + if (memcmp (envline, "MMAP_MAX_", 9) == 0) + __libc_mallopt (M_MMAP_MAX, atoi (&envline[10])); + else if (memcmp (envline, "ARENA_MAX", 9) == 0) + __libc_mallopt (M_ARENA_MAX, atoi (&envline[10])); + } + break; + case 10: + if (!__builtin_expect (__libc_enable_secure, 0)) + { + if (memcmp (envline, "ARENA_TEST", 10) == 0) + __libc_mallopt (M_ARENA_TEST, atoi (&envline[11])); + } + break; + case 15: + if (!__builtin_expect (__libc_enable_secure, 0)) + { + if (memcmp (envline, "TRIM_THRESHOLD_", 15) == 0) + __libc_mallopt (M_TRIM_THRESHOLD, atoi (&envline[16])); + else if (memcmp (envline, "MMAP_THRESHOLD_", 15) == 0) + __libc_mallopt (M_MMAP_THRESHOLD, atoi (&envline[16])); + } + break; + default: + break; + } + } + } + if (s && s[0]) + { + __libc_mallopt (M_CHECK_ACTION, (int) (s[0] - '0')); + if (check_action != 0) + __malloc_check_init (); } - if(s && s[0]) { - __libc_mallopt(M_CHECK_ACTION, (int)(s[0] - '0')); - if (check_action != 0) - __malloc_check_init(); - } void (*hook) (void) = atomic_forced_read (__malloc_initialize_hook); if (hook != NULL) (*hook)(); @@ -446,11 +466,11 @@ ptmalloc_init (void) /* There are platforms (e.g. Hurd) with a link-time hook mechanism. */ #ifdef thread_atfork_static -thread_atfork_static(ptmalloc_lock_all, ptmalloc_unlock_all, \ - ptmalloc_unlock_all2) +thread_atfork_static (ptmalloc_lock_all, ptmalloc_unlock_all, \ + ptmalloc_unlock_all2) #endif - + /* Managing heaps and arenas (for concurrent threads) */ @@ -459,30 +479,33 @@ thread_atfork_static(ptmalloc_lock_all, ptmalloc_unlock_all, \ /* Print the complete contents of a single heap to stderr. */ static void -dump_heap(heap_info *heap) +dump_heap (heap_info *heap) { char *ptr; mchunkptr p; - fprintf(stderr, "Heap %p, size %10lx:\n", heap, (long)heap->size); - ptr = (heap->ar_ptr != (mstate)(heap+1)) ? - (char*)(heap + 1) : (char*)(heap + 1) + sizeof(struct malloc_state); - p = (mchunkptr)(((unsigned long)ptr + MALLOC_ALIGN_MASK) & - ~MALLOC_ALIGN_MASK); - for(;;) { - fprintf(stderr, "chunk %p size %10lx", p, (long)p->size); - if(p == top(heap->ar_ptr)) { - fprintf(stderr, " (top)\n"); - break; - } else if(p->size == (0|PREV_INUSE)) { - fprintf(stderr, " (fence)\n"); - break; + fprintf (stderr, "Heap %p, size %10lx:\n", heap, (long) heap->size); + ptr = (heap->ar_ptr != (mstate) (heap + 1)) ? + (char *) (heap + 1) : (char *) (heap + 1) + sizeof (struct malloc_state); + p = (mchunkptr) (((unsigned long) ptr + MALLOC_ALIGN_MASK) & + ~MALLOC_ALIGN_MASK); + for (;; ) + { + fprintf (stderr, "chunk %p size %10lx", p, (long) p->size); + if (p == top (heap->ar_ptr)) + { + fprintf (stderr, " (top)\n"); + break; + } + else if (p->size == (0 | PREV_INUSE)) + { + fprintf (stderr, " (fence)\n"); + break; + } + fprintf (stderr, "\n"); + p = next_chunk (p); } - fprintf(stderr, "\n"); - p = next_chunk(p); - } } - #endif /* MALLOC_DEBUG > 1 */ /* If consecutive mmap (0, HEAP_MAX_SIZE << 1, ...) calls return decreasing @@ -500,18 +523,18 @@ static char *aligned_heap_area; static heap_info * internal_function -new_heap(size_t size, size_t top_pad) +new_heap (size_t size, size_t top_pad) { - size_t page_mask = GLRO(dl_pagesize) - 1; + size_t page_mask = GLRO (dl_pagesize) - 1; char *p1, *p2; unsigned long ul; heap_info *h; - if(size+top_pad < HEAP_MIN_SIZE) + if (size + top_pad < HEAP_MIN_SIZE) size = HEAP_MIN_SIZE; - else if(size+top_pad <= HEAP_MAX_SIZE) + else if (size + top_pad <= HEAP_MAX_SIZE) size += top_pad; - else if(size > HEAP_MAX_SIZE) + else if (size > HEAP_MAX_SIZE) return 0; else size = HEAP_MAX_SIZE; @@ -522,46 +545,55 @@ new_heap(size_t size, size_t top_pad) mapping (on Linux, this is the case for all non-writable mappings anyway). */ p2 = MAP_FAILED; - if(aligned_heap_area) { - p2 = (char *)MMAP(aligned_heap_area, HEAP_MAX_SIZE, PROT_NONE, - MAP_NORESERVE); - aligned_heap_area = NULL; - if (p2 != MAP_FAILED && ((unsigned long)p2 & (HEAP_MAX_SIZE-1))) { - __munmap(p2, HEAP_MAX_SIZE); - p2 = MAP_FAILED; + if (aligned_heap_area) + { + p2 = (char *) MMAP (aligned_heap_area, HEAP_MAX_SIZE, PROT_NONE, + MAP_NORESERVE); + aligned_heap_area = NULL; + if (p2 != MAP_FAILED && ((unsigned long) p2 & (HEAP_MAX_SIZE - 1))) + { + __munmap (p2, HEAP_MAX_SIZE); + p2 = MAP_FAILED; + } } - } - if(p2 == MAP_FAILED) { - p1 = (char *)MMAP(0, HEAP_MAX_SIZE<<1, PROT_NONE, MAP_NORESERVE); - if(p1 != MAP_FAILED) { - p2 = (char *)(((unsigned long)p1 + (HEAP_MAX_SIZE-1)) - & ~(HEAP_MAX_SIZE-1)); - ul = p2 - p1; - if (ul) - __munmap(p1, ul); + if (p2 == MAP_FAILED) + { + p1 = (char *) MMAP (0, HEAP_MAX_SIZE << 1, PROT_NONE, MAP_NORESERVE); + if (p1 != MAP_FAILED) + { + p2 = (char *) (((unsigned long) p1 + (HEAP_MAX_SIZE - 1)) + & ~(HEAP_MAX_SIZE - 1)); + ul = p2 - p1; + if (ul) + __munmap (p1, ul); + else + aligned_heap_area = p2 + HEAP_MAX_SIZE; + __munmap (p2 + HEAP_MAX_SIZE, HEAP_MAX_SIZE - ul); + } else - aligned_heap_area = p2 + HEAP_MAX_SIZE; - __munmap(p2 + HEAP_MAX_SIZE, HEAP_MAX_SIZE - ul); - } else { - /* Try to take the chance that an allocation of only HEAP_MAX_SIZE - is already aligned. */ - p2 = (char *)MMAP(0, HEAP_MAX_SIZE, PROT_NONE, MAP_NORESERVE); - if(p2 == MAP_FAILED) - return 0; - if((unsigned long)p2 & (HEAP_MAX_SIZE-1)) { - __munmap(p2, HEAP_MAX_SIZE); - return 0; - } + { + /* Try to take the chance that an allocation of only HEAP_MAX_SIZE + is already aligned. */ + p2 = (char *) MMAP (0, HEAP_MAX_SIZE, PROT_NONE, MAP_NORESERVE); + if (p2 == MAP_FAILED) + return 0; + + if ((unsigned long) p2 & (HEAP_MAX_SIZE - 1)) + { + __munmap (p2, HEAP_MAX_SIZE); + return 0; + } + } } - } - if(__mprotect(p2, size, PROT_READ|PROT_WRITE) != 0) { - __munmap(p2, HEAP_MAX_SIZE); - return 0; - } - h = (heap_info *)p2; + if (__mprotect (p2, size, PROT_READ | PROT_WRITE) != 0) + { + __munmap (p2, HEAP_MAX_SIZE); + return 0; + } + h = (heap_info *) p2; h->size = size; h->mprotect_size = size; - THREAD_STAT(stat_n_heaps++); + THREAD_STAT (stat_n_heaps++); LIBC_PROBE (memory_heap_new, 2, h, h->size); return h; } @@ -570,22 +602,25 @@ new_heap(size_t size, size_t top_pad) multiple of the page size. */ static int -grow_heap(heap_info *h, long diff) +grow_heap (heap_info *h, long diff) { - size_t page_mask = GLRO(dl_pagesize) - 1; + size_t page_mask = GLRO (dl_pagesize) - 1; long new_size; diff = (diff + page_mask) & ~page_mask; - new_size = (long)h->size + diff; - if((unsigned long) new_size > (unsigned long) HEAP_MAX_SIZE) + new_size = (long) h->size + diff; + if ((unsigned long) new_size > (unsigned long) HEAP_MAX_SIZE) return -1; - if((unsigned long) new_size > h->mprotect_size) { - if (__mprotect((char *)h + h->mprotect_size, - (unsigned long) new_size - h->mprotect_size, - PROT_READ|PROT_WRITE) != 0) - return -2; - h->mprotect_size = new_size; - } + + if ((unsigned long) new_size > h->mprotect_size) + { + if (__mprotect ((char *) h + h->mprotect_size, + (unsigned long) new_size - h->mprotect_size, + PROT_READ | PROT_WRITE) != 0) + return -2; + + h->mprotect_size = new_size; + } h->size = new_size; LIBC_PROBE (memory_heap_more, 2, h, h->size); @@ -595,24 +630,26 @@ grow_heap(heap_info *h, long diff) /* Shrink a heap. */ static int -shrink_heap(heap_info *h, long diff) +shrink_heap (heap_info *h, long diff) { long new_size; - new_size = (long)h->size - diff; - if(new_size < (long)sizeof(*h)) + new_size = (long) h->size - diff; + if (new_size < (long) sizeof (*h)) return -1; + /* Try to re-map the extra heap space freshly to save memory, and make it inaccessible. See malloc-sysdep.h to know when this is true. */ if (__builtin_expect (check_may_shrink_heap (), 0)) { - if((char *)MMAP((char *)h + new_size, diff, PROT_NONE, - MAP_FIXED) == (char *) MAP_FAILED) - return -2; + if ((char *) MMAP ((char *) h + new_size, diff, PROT_NONE, + MAP_FIXED) == (char *) MAP_FAILED) + return -2; + h->mprotect_size = new_size; } else - __madvise ((char *)h + new_size, diff, MADV_DONTNEED); + __madvise ((char *) h + new_size, diff, MADV_DONTNEED); /*fprintf(stderr, "shrink %p %08lx\n", h, new_size);*/ h->size = new_size; @@ -623,66 +660,70 @@ shrink_heap(heap_info *h, long diff) /* Delete a heap. */ #define delete_heap(heap) \ - do { \ - if ((char *)(heap) + HEAP_MAX_SIZE == aligned_heap_area) \ - aligned_heap_area = NULL; \ - __munmap((char*)(heap), HEAP_MAX_SIZE); \ - } while (0) + do { \ + if ((char *) (heap) + HEAP_MAX_SIZE == aligned_heap_area) \ + aligned_heap_area = NULL; \ + __munmap ((char *) (heap), HEAP_MAX_SIZE); \ + } while (0) static int internal_function -heap_trim(heap_info *heap, size_t pad) +heap_trim (heap_info *heap, size_t pad) { mstate ar_ptr = heap->ar_ptr; - unsigned long pagesz = GLRO(dl_pagesize); - mchunkptr top_chunk = top(ar_ptr), p, bck, fwd; + unsigned long pagesz = GLRO (dl_pagesize); + mchunkptr top_chunk = top (ar_ptr), p, bck, fwd; heap_info *prev_heap; long new_size, top_size, extra, prev_size, misalign; /* Can this heap go away completely? */ - while(top_chunk == chunk_at_offset(heap, sizeof(*heap))) { - prev_heap = heap->prev; - prev_size = prev_heap->size - (MINSIZE-2*SIZE_SZ); - p = chunk_at_offset(prev_heap, prev_size); - /* fencepost must be properly aligned. */ - misalign = ((long) p) & MALLOC_ALIGN_MASK; - p = chunk_at_offset(prev_heap, prev_size - misalign); - assert(p->size == (0|PREV_INUSE)); /* must be fencepost */ - p = prev_chunk(p); - new_size = chunksize(p) + (MINSIZE-2*SIZE_SZ) + misalign; - assert(new_size>0 && new_size<(long)(2*MINSIZE)); - if(!prev_inuse(p)) - new_size += p->prev_size; - assert(new_size>0 && new_size<HEAP_MAX_SIZE); - if(new_size + (HEAP_MAX_SIZE - prev_heap->size) < pad + MINSIZE + pagesz) - break; - ar_ptr->system_mem -= heap->size; - arena_mem -= heap->size; - LIBC_PROBE (memory_heap_free, 2, heap, heap->size); - delete_heap(heap); - heap = prev_heap; - if(!prev_inuse(p)) { /* consolidate backward */ - p = prev_chunk(p); - unlink(p, bck, fwd); + while (top_chunk == chunk_at_offset (heap, sizeof (*heap))) + { + prev_heap = heap->prev; + prev_size = prev_heap->size - (MINSIZE - 2 * SIZE_SZ); + p = chunk_at_offset (prev_heap, prev_size); + /* fencepost must be properly aligned. */ + misalign = ((long) p) & MALLOC_ALIGN_MASK; + p = chunk_at_offset (prev_heap, prev_size - misalign); + assert (p->size == (0 | PREV_INUSE)); /* must be fencepost */ + p = prev_chunk (p); + new_size = chunksize (p) + (MINSIZE - 2 * SIZE_SZ) + misalign; + assert (new_size > 0 && new_size < (long) (2 * MINSIZE)); + if (!prev_inuse (p)) + new_size += p->prev_size; + assert (new_size > 0 && new_size < HEAP_MAX_SIZE); + if (new_size + (HEAP_MAX_SIZE - prev_heap->size) < pad + MINSIZE + pagesz) + break; + ar_ptr->system_mem -= heap->size; + arena_mem -= heap->size; + LIBC_PROBE (memory_heap_free, 2, heap, heap->size); + delete_heap (heap); + heap = prev_heap; + if (!prev_inuse (p)) /* consolidate backward */ + { + p = prev_chunk (p); + unlink (p, bck, fwd); + } + assert (((unsigned long) ((char *) p + new_size) & (pagesz - 1)) == 0); + assert (((char *) p + new_size) == ((char *) heap + heap->size)); + top (ar_ptr) = top_chunk = p; + set_head (top_chunk, new_size | PREV_INUSE); + /*check_chunk(ar_ptr, top_chunk);*/ } - assert(((unsigned long)((char*)p + new_size) & (pagesz-1)) == 0); - assert( ((char*)p + new_size) == ((char*)heap + heap->size) ); - top(ar_ptr) = top_chunk = p; - set_head(top_chunk, new_size | PREV_INUSE); - /*check_chunk(ar_ptr, top_chunk);*/ - } - top_size = chunksize(top_chunk); + top_size = chunksize (top_chunk); extra = (top_size - pad - MINSIZE - 1) & ~(pagesz - 1); - if(extra < (long)pagesz) + if (extra < (long) pagesz) return 0; + /* Try to shrink. */ - if(shrink_heap(heap, extra) != 0) + if (shrink_heap (heap, extra) != 0) return 0; + ar_ptr->system_mem -= extra; arena_mem -= extra; /* Success. Adjust top accordingly. */ - set_head(top_chunk, (top_size - extra) | PREV_INUSE); + set_head (top_chunk, (top_size - extra) | PREV_INUSE); /*check_chunk(ar_ptr, top_chunk);*/ return 1; } @@ -690,52 +731,53 @@ heap_trim(heap_info *heap, size_t pad) /* Create a new arena with initial size "size". */ static mstate -_int_new_arena(size_t size) +_int_new_arena (size_t size) { mstate a; heap_info *h; char *ptr; unsigned long misalign; - h = new_heap(size + (sizeof(*h) + sizeof(*a) + MALLOC_ALIGNMENT), - mp_.top_pad); - if(!h) { - /* Maybe size is too large to fit in a single heap. So, just try - to create a minimally-sized arena and let _int_malloc() attempt - to deal with the large request via mmap_chunk(). */ - h = new_heap(sizeof(*h) + sizeof(*a) + MALLOC_ALIGNMENT, mp_.top_pad); - if(!h) - return 0; - } - a = h->ar_ptr = (mstate)(h+1); - malloc_init_state(a); + h = new_heap (size + (sizeof (*h) + sizeof (*a) + MALLOC_ALIGNMENT), + mp_.top_pad); + if (!h) + { + /* Maybe size is too large to fit in a single heap. So, just try + to create a minimally-sized arena and let _int_malloc() attempt + to deal with the large request via mmap_chunk(). */ + h = new_heap (sizeof (*h) + sizeof (*a) + MALLOC_ALIGNMENT, mp_.top_pad); + if (!h) + return 0; + } + a = h->ar_ptr = (mstate) (h + 1); + malloc_init_state (a); /*a->next = NULL;*/ a->system_mem = a->max_system_mem = h->size; arena_mem += h->size; /* Set up the top chunk, with proper alignment. */ - ptr = (char *)(a + 1); - misalign = (unsigned long)chunk2mem(ptr) & MALLOC_ALIGN_MASK; + ptr = (char *) (a + 1); + misalign = (unsigned long) chunk2mem (ptr) & MALLOC_ALIGN_MASK; if (misalign > 0) ptr += MALLOC_ALIGNMENT - misalign; - top(a) = (mchunkptr)ptr; - set_head(top(a), (((char*)h + h->size) - ptr) | PREV_INUSE); + top (a) = (mchunkptr) ptr; + set_head (top (a), (((char *) h + h->size) - ptr) | PREV_INUSE); LIBC_PROBE (memory_arena_new, 2, a, size); - tsd_setspecific(arena_key, (void *)a); - mutex_init(&a->mutex); - (void)mutex_lock(&a->mutex); + tsd_setspecific (arena_key, (void *) a); + mutex_init (&a->mutex); + (void) mutex_lock (&a->mutex); - (void)mutex_lock(&list_lock); + (void) mutex_lock (&list_lock); /* Add the new arena to the global list. */ a->next = main_arena.next; atomic_write_barrier (); main_arena.next = a; - (void)mutex_unlock(&list_lock); + (void) mutex_unlock (&list_lock); - THREAD_STAT(++(a->stat_lock_loop)); + THREAD_STAT (++(a->stat_lock_loop)); return a; } @@ -747,19 +789,19 @@ get_free_list (void) mstate result = free_list; if (result != NULL) { - (void)mutex_lock(&list_lock); + (void) mutex_lock (&list_lock); result = free_list; if (result != NULL) - free_list = result->next_free; - (void)mutex_unlock(&list_lock); + free_list = result->next_free; + (void) mutex_unlock (&list_lock); if (result != NULL) - { - LIBC_PROBE (memory_arena_reuse_free_list, 1, result); - (void)mutex_lock(&result->mutex); - tsd_setspecific(arena_key, (void *)result); - THREAD_STAT(++(result->stat_lock_loop)); - } + { + LIBC_PROBE (memory_arena_reuse_free_list, 1, result); + (void) mutex_lock (&result->mutex); + tsd_setspecific (arena_key, (void *) result); + THREAD_STAT (++(result->stat_lock_loop)); + } } return result; @@ -779,8 +821,8 @@ reused_arena (mstate avoid_arena) result = next_to_use; do { - if (!mutex_trylock(&result->mutex)) - goto out; + if (!mutex_trylock (&result->mutex)) + goto out; result = result->next; } @@ -793,12 +835,12 @@ reused_arena (mstate avoid_arena) /* No arena available. Wait for the next in line. */ LIBC_PROBE (memory_arena_reuse_wait, 3, &result->mutex, result, avoid_arena); - (void)mutex_lock(&result->mutex); + (void) mutex_lock (&result->mutex); - out: +out: LIBC_PROBE (memory_arena_reuse, 2, result, avoid_arena); - tsd_setspecific(arena_key, (void *)result); - THREAD_STAT(++(result->stat_lock_loop)); + tsd_setspecific (arena_key, (void *) result); + THREAD_STAT (++(result->stat_lock_loop)); next_to_use = result->next; return result; @@ -806,7 +848,7 @@ reused_arena (mstate avoid_arena) static mstate internal_function -arena_get2(mstate a_tsd, size_t size, mstate avoid_arena) +arena_get2 (mstate a_tsd, size_t size, mstate avoid_arena) { mstate a; @@ -817,40 +859,40 @@ arena_get2(mstate a_tsd, size_t size, mstate avoid_arena) { /* Nothing immediately available, so generate a new arena. */ if (narenas_limit == 0) - { - if (mp_.arena_max != 0) - narenas_limit = mp_.arena_max; - else if (narenas > mp_.arena_test) - { - int n = __get_nprocs (); - - if (n >= 1) - narenas_limit = NARENAS_FROM_NCORES (n); - else - /* We have no information about the system. Assume two - cores. */ - narenas_limit = NARENAS_FROM_NCORES (2); - } - } + { + if (mp_.arena_max != 0) + narenas_limit = mp_.arena_max; + else if (narenas > mp_.arena_test) + { + int n = __get_nprocs (); + + if (n >= 1) + narenas_limit = NARENAS_FROM_NCORES (n); + else + /* We have no information about the system. Assume two + cores. */ + narenas_limit = NARENAS_FROM_NCORES (2); + } + } repeat:; size_t n = narenas; /* NB: the following depends on the fact that (size_t)0 - 1 is a - very large number and that the underflow is OK. If arena_max - is set the value of arena_test is irrelevant. If arena_test - is set but narenas is not yet larger or equal to arena_test - narenas_limit is 0. There is no possibility for narenas to - be too big for the test to always fail since there is not - enough address space to create that many arenas. */ + very large number and that the underflow is OK. If arena_max + is set the value of arena_test is irrelevant. If arena_test + is set but narenas is not yet larger or equal to arena_test + narenas_limit is 0. There is no possibility for narenas to + be too big for the test to always fail since there is not + enough address space to create that many arenas. */ if (__builtin_expect (n <= narenas_limit - 1, 0)) - { - if (catomic_compare_and_exchange_bool_acq (&narenas, n + 1, n)) - goto repeat; - a = _int_new_arena (size); - if (__builtin_expect (a == NULL, 0)) - catomic_decrement (&narenas); - } + { + if (catomic_compare_and_exchange_bool_acq (&narenas, n + 1, n)) + goto repeat; + a = _int_new_arena (size); + if (__builtin_expect (a == NULL, 0)) + catomic_decrement (&narenas); + } else - a = reused_arena (avoid_arena); + a = reused_arena (avoid_arena); } return a; } @@ -863,16 +905,19 @@ static mstate arena_get_retry (mstate ar_ptr, size_t bytes) { LIBC_PROBE (memory_arena_retry, 2, bytes, ar_ptr); - if(ar_ptr != &main_arena) { - (void)mutex_unlock(&ar_ptr->mutex); - ar_ptr = &main_arena; - (void)mutex_lock(&ar_ptr->mutex); - } else { - /* Grab ar_ptr->next prior to releasing its lock. */ - mstate prev = ar_ptr->next ? ar_ptr : 0; - (void)mutex_unlock(&ar_ptr->mutex); - ar_ptr = arena_get2(prev, bytes, ar_ptr); - } + if (ar_ptr != &main_arena) + { + (void) mutex_unlock (&ar_ptr->mutex); + ar_ptr = &main_arena; + (void) mutex_lock (&ar_ptr->mutex); + } + else + { + /* Grab ar_ptr->next prior to releasing its lock. */ + mstate prev = ar_ptr->next ? ar_ptr : 0; + (void) mutex_unlock (&ar_ptr->mutex); + ar_ptr = arena_get2 (prev, bytes, ar_ptr); + } return ar_ptr; } @@ -881,15 +926,15 @@ static void __attribute__ ((section ("__libc_thread_freeres_fn"))) arena_thread_freeres (void) { void *vptr = NULL; - mstate a = tsd_getspecific(arena_key, vptr); - tsd_setspecific(arena_key, NULL); + mstate a = tsd_getspecific (arena_key, vptr); + tsd_setspecific (arena_key, NULL); if (a != NULL) { - (void)mutex_lock(&list_lock); + (void) mutex_lock (&list_lock); a->next_free = free_list; free_list = a; - (void)mutex_unlock(&list_lock); + (void) mutex_unlock (&list_lock); } } text_set_element (__libc_thread_subfreeres, arena_thread_freeres); diff --git a/malloc/hooks.c b/malloc/hooks.c index 1b80a74..00ee6be 100644 --- a/malloc/hooks.c +++ b/malloc/hooks.c @@ -24,29 +24,29 @@ /* Hooks for debugging versions. The initial hooks just call the initialization routine, then do the normal work. */ -static void* -malloc_hook_ini(size_t sz, const void *caller) +static void * +malloc_hook_ini (size_t sz, const void *caller) { __malloc_hook = NULL; - ptmalloc_init(); - return __libc_malloc(sz); + ptmalloc_init (); + return __libc_malloc (sz); } -static void* -realloc_hook_ini(void* ptr, size_t sz, const void *caller) +static void * +realloc_hook_ini (void *ptr, size_t sz, const void *caller) { __malloc_hook = NULL; __realloc_hook = NULL; - ptmalloc_init(); - return __libc_realloc(ptr, sz); + ptmalloc_init (); + return __libc_realloc (ptr, sz); } -static void* -memalign_hook_ini(size_t alignment, size_t sz, const void *caller) +static void * +memalign_hook_ini (size_t alignment, size_t sz, const void *caller) { __memalign_hook = NULL; - ptmalloc_init(); - return __libc_memalign(alignment, sz); + ptmalloc_init (); + return __libc_memalign (alignment, sz); } /* Whether we are using malloc checking. */ @@ -71,10 +71,11 @@ static int disallow_malloc_check; void __malloc_check_init (void) { - if (disallow_malloc_check) { - disallow_malloc_check = 0; - return; - } + if (disallow_malloc_check) + { + disallow_malloc_check = 0; + return; + } using_malloc_checking = 1; __malloc_hook = malloc_check; __free_hook = free_check; @@ -87,7 +88,7 @@ __malloc_check_init (void) overruns. The goal here is to avoid obscure crashes due to invalid usage, unlike in the MALLOC_DEBUG code. */ -#define MAGICBYTE(p) ( ( ((size_t)p >> 3) ^ ((size_t)p >> 11)) & 0xFF ) +#define MAGICBYTE(p) ((((size_t) p >> 3) ^ ((size_t) p >> 11)) & 0xFF) /* Visualize the chunk as being partitioned into blocks of 256 bytes from the highest address of the chunk, downwards. The beginning of each block tells @@ -96,53 +97,58 @@ __malloc_check_init (void) must reach it with this iteration, otherwise we have witnessed a memory corruption. */ static size_t -malloc_check_get_size(mchunkptr p) +malloc_check_get_size (mchunkptr p) { size_t size; unsigned char c; - unsigned char magic = MAGICBYTE(p); + unsigned char magic = MAGICBYTE (p); - assert(using_malloc_checking == 1); + assert (using_malloc_checking == 1); - for (size = chunksize(p) - 1 + (chunk_is_mmapped(p) ? 0 : SIZE_SZ); - (c = ((unsigned char*)p)[size]) != magic; - size -= c) { - if(c<=0 || size<(c+2*SIZE_SZ)) { - malloc_printerr(check_action, "malloc_check_get_size: memory corruption", - chunk2mem(p)); - return 0; + for (size = chunksize (p) - 1 + (chunk_is_mmapped (p) ? 0 : SIZE_SZ); + (c = ((unsigned char *) p)[size]) != magic; + size -= c) + { + if (c <= 0 || size < (c + 2 * SIZE_SZ)) + { + malloc_printerr (check_action, "malloc_check_get_size: memory corruption", + chunk2mem (p)); + return 0; + } } - } /* chunk2mem size. */ - return size - 2*SIZE_SZ; + return size - 2 * SIZE_SZ; } /* Instrument a chunk with overrun detector byte(s) and convert it into a user pointer with requested size sz. */ -static void* +static void * internal_function -mem2mem_check(void *ptr, size_t sz) +mem2mem_check (void *ptr, size_t sz) { mchunkptr p; - unsigned char* m_ptr = ptr; + unsigned char *m_ptr = ptr; size_t i; if (!ptr) return ptr; - p = mem2chunk(ptr); - for(i = chunksize(p) - (chunk_is_mmapped(p) ? 2*SIZE_SZ+1 : SIZE_SZ+1); - i > sz; - i -= 0xFF) { - if(i-sz < 0x100) { - m_ptr[i] = (unsigned char)(i-sz); - break; + + p = mem2chunk (ptr); + for (i = chunksize (p) - (chunk_is_mmapped (p) ? 2 * SIZE_SZ + 1 : SIZE_SZ + 1); + i > sz; + i -= 0xFF) + { + if (i - sz < 0x100) + { + m_ptr[i] = (unsigned char) (i - sz); + break; + } + m_ptr[i] = 0xFF; } - m_ptr[i] = 0xFF; - } - m_ptr[sz] = MAGICBYTE(p); - return (void*)m_ptr; + m_ptr[sz] = MAGICBYTE (p); + return (void *) m_ptr; } /* Convert a pointer to be free()d or realloc()ed to a valid chunk @@ -150,53 +156,64 @@ mem2mem_check(void *ptr, size_t sz) static mchunkptr internal_function -mem2chunk_check(void* mem, unsigned char **magic_p) +mem2chunk_check (void *mem, unsigned char **magic_p) { mchunkptr p; INTERNAL_SIZE_T sz, c; unsigned char magic; - if(!aligned_OK(mem)) return NULL; - p = mem2chunk(mem); - if (!chunk_is_mmapped(p)) { - /* Must be a chunk in conventional heap memory. */ - int contig = contiguous(&main_arena); - sz = chunksize(p); - if((contig && - ((char*)p<mp_.sbrk_base || - ((char*)p + sz)>=(mp_.sbrk_base+main_arena.system_mem) )) || - sz<MINSIZE || sz&MALLOC_ALIGN_MASK || !inuse(p) || - ( !prev_inuse(p) && (p->prev_size&MALLOC_ALIGN_MASK || - (contig && (char*)prev_chunk(p)<mp_.sbrk_base) || - next_chunk(prev_chunk(p))!=p) )) - return NULL; - magic = MAGICBYTE(p); - for(sz += SIZE_SZ-1; (c = ((unsigned char*)p)[sz]) != magic; sz -= c) { - if(c<=0 || sz<(c+2*SIZE_SZ)) return NULL; + if (!aligned_OK (mem)) + return NULL; + + p = mem2chunk (mem); + if (!chunk_is_mmapped (p)) + { + /* Must be a chunk in conventional heap memory. */ + int contig = contiguous (&main_arena); + sz = chunksize (p); + if ((contig && + ((char *) p < mp_.sbrk_base || + ((char *) p + sz) >= (mp_.sbrk_base + main_arena.system_mem))) || + sz < MINSIZE || sz & MALLOC_ALIGN_MASK || !inuse (p) || + (!prev_inuse (p) && (p->prev_size & MALLOC_ALIGN_MASK || + (contig && (char *) prev_chunk (p) < mp_.sbrk_base) || + next_chunk (prev_chunk (p)) != p))) + return NULL; + + magic = MAGICBYTE (p); + for (sz += SIZE_SZ - 1; (c = ((unsigned char *) p)[sz]) != magic; sz -= c) + { + if (c <= 0 || sz < (c + 2 * SIZE_SZ)) + return NULL; + } } - } else { - unsigned long offset, page_mask = GLRO(dl_pagesize)-1; - - /* mmap()ed chunks have MALLOC_ALIGNMENT or higher power-of-two - alignment relative to the beginning of a page. Check this - first. */ - offset = (unsigned long)mem & page_mask; - if((offset!=MALLOC_ALIGNMENT && offset!=0 && offset!=0x10 && - offset!=0x20 && offset!=0x40 && offset!=0x80 && offset!=0x100 && - offset!=0x200 && offset!=0x400 && offset!=0x800 && offset!=0x1000 && - offset<0x2000) || - !chunk_is_mmapped(p) || (p->size & PREV_INUSE) || - ( (((unsigned long)p - p->prev_size) & page_mask) != 0 ) || - ( (sz = chunksize(p)), ((p->prev_size + sz) & page_mask) != 0 ) ) - return NULL; - magic = MAGICBYTE(p); - for(sz -= 1; (c = ((unsigned char*)p)[sz]) != magic; sz -= c) { - if(c<=0 || sz<(c+2*SIZE_SZ)) return NULL; + else + { + unsigned long offset, page_mask = GLRO (dl_pagesize) - 1; + + /* mmap()ed chunks have MALLOC_ALIGNMENT or higher power-of-two + alignment relative to the beginning of a page. Check this + first. */ + offset = (unsigned long) mem & page_mask; + if ((offset != MALLOC_ALIGNMENT && offset != 0 && offset != 0x10 && + offset != 0x20 && offset != 0x40 && offset != 0x80 && offset != 0x100 && + offset != 0x200 && offset != 0x400 && offset != 0x800 && offset != 0x1000 && + offset < 0x2000) || + !chunk_is_mmapped (p) || (p->size & PREV_INUSE) || + ((((unsigned long) p - p->prev_size) & page_mask) != 0) || + ((sz = chunksize (p)), ((p->prev_size + sz) & page_mask) != 0)) + return NULL; + + magic = MAGICBYTE (p); + for (sz -= 1; (c = ((unsigned char *) p)[sz]) != magic; sz -= c) + { + if (c <= 0 || sz < (c + 2 * SIZE_SZ)) + return NULL; + } } - } - ((unsigned char*)p)[sz] ^= 0xFF; + ((unsigned char *) p)[sz] ^= 0xFF; if (magic_p) - *magic_p = (unsigned char *)p + sz; + *magic_p = (unsigned char *) p + sz; return p; } @@ -205,32 +222,32 @@ mem2chunk_check(void* mem, unsigned char **magic_p) static int internal_function -top_check(void) +top_check (void) { - mchunkptr t = top(&main_arena); - char* brk, * new_brk; + mchunkptr t = top (&main_arena); + char *brk, *new_brk; INTERNAL_SIZE_T front_misalign, sbrk_size; - unsigned long pagesz = GLRO(dl_pagesize); - - if (t == initial_top(&main_arena) || - (!chunk_is_mmapped(t) && - chunksize(t)>=MINSIZE && - prev_inuse(t) && - (!contiguous(&main_arena) || - (char*)t + chunksize(t) == mp_.sbrk_base + main_arena.system_mem))) + unsigned long pagesz = GLRO (dl_pagesize); + + if (t == initial_top (&main_arena) || + (!chunk_is_mmapped (t) && + chunksize (t) >= MINSIZE && + prev_inuse (t) && + (!contiguous (&main_arena) || + (char *) t + chunksize (t) == mp_.sbrk_base + main_arena.system_mem))) return 0; malloc_printerr (check_action, "malloc: top chunk is corrupt", t); /* Try to set up a new top chunk. */ - brk = MORECORE(0); - front_misalign = (unsigned long)chunk2mem(brk) & MALLOC_ALIGN_MASK; + brk = MORECORE (0); + front_misalign = (unsigned long) chunk2mem (brk) & MALLOC_ALIGN_MASK; if (front_misalign > 0) front_misalign = MALLOC_ALIGNMENT - front_misalign; sbrk_size = front_misalign + mp_.top_pad + MINSIZE; - sbrk_size += pagesz - ((unsigned long)(brk + sbrk_size) & (pagesz - 1)); - new_brk = (char*)(MORECORE (sbrk_size)); - if (new_brk == (char*)(MORECORE_FAILURE)) + sbrk_size += pagesz - ((unsigned long) (brk + sbrk_size) & (pagesz - 1)); + new_brk = (char *) (MORECORE (sbrk_size)); + if (new_brk == (char *) (MORECORE_FAILURE)) { __set_errno (ENOMEM); return -1; @@ -238,128 +255,148 @@ top_check(void) /* Call the `morecore' hook if necessary. */ void (*hook) (void) = atomic_forced_read (__after_morecore_hook); if (hook) - (*hook) (); + (*hook)(); main_arena.system_mem = (new_brk - mp_.sbrk_base) + sbrk_size; - top(&main_arena) = (mchunkptr)(brk + front_misalign); - set_head(top(&main_arena), (sbrk_size - front_misalign) | PREV_INUSE); + top (&main_arena) = (mchunkptr) (brk + front_misalign); + set_head (top (&main_arena), (sbrk_size - front_misalign) | PREV_INUSE); return 0; } -static void* -malloc_check(size_t sz, const void *caller) +static void * +malloc_check (size_t sz, const void *caller) { void *victim; - if (sz+1 == 0) { - __set_errno (ENOMEM); - return NULL; - } + if (sz + 1 == 0) + { + __set_errno (ENOMEM); + return NULL; + } - (void)mutex_lock(&main_arena.mutex); - victim = (top_check() >= 0) ? _int_malloc(&main_arena, sz+1) : NULL; - (void)mutex_unlock(&main_arena.mutex); - return mem2mem_check(victim, sz); + (void) mutex_lock (&main_arena.mutex); + victim = (top_check () >= 0) ? _int_malloc (&main_arena, sz + 1) : NULL; + (void) mutex_unlock (&main_arena.mutex); + return mem2mem_check (victim, sz); } static void -free_check(void* mem, const void *caller) +free_check (void *mem, const void *caller) { mchunkptr p; - if(!mem) return; - (void)mutex_lock(&main_arena.mutex); - p = mem2chunk_check(mem, NULL); - if(!p) { - (void)mutex_unlock(&main_arena.mutex); - - malloc_printerr(check_action, "free(): invalid pointer", mem); + if (!mem) return; - } - if (chunk_is_mmapped(p)) { - (void)mutex_unlock(&main_arena.mutex); - munmap_chunk(p); - return; - } - _int_free(&main_arena, p, 1); - (void)mutex_unlock(&main_arena.mutex); + + (void) mutex_lock (&main_arena.mutex); + p = mem2chunk_check (mem, NULL); + if (!p) + { + (void) mutex_unlock (&main_arena.mutex); + + malloc_printerr (check_action, "free(): invalid pointer", mem); + return; + } + if (chunk_is_mmapped (p)) + { + (void) mutex_unlock (&main_arena.mutex); + munmap_chunk (p); + return; + } + _int_free (&main_arena, p, 1); + (void) mutex_unlock (&main_arena.mutex); } -static void* -realloc_check(void* oldmem, size_t bytes, const void *caller) +static void * +realloc_check (void *oldmem, size_t bytes, const void *caller) { INTERNAL_SIZE_T nb; - void* newmem = 0; + void *newmem = 0; unsigned char *magic_p; - if (bytes+1 == 0) { - __set_errno (ENOMEM); - return NULL; - } - if (oldmem == 0) return malloc_check(bytes, NULL); - if (bytes == 0) { - free_check (oldmem, NULL); - return NULL; - } - (void)mutex_lock(&main_arena.mutex); - const mchunkptr oldp = mem2chunk_check(oldmem, &magic_p); - (void)mutex_unlock(&main_arena.mutex); - if(!oldp) { - malloc_printerr(check_action, "realloc(): invalid pointer", oldmem); - return malloc_check(bytes, NULL); - } - const INTERNAL_SIZE_T oldsize = chunksize(oldp); - - checked_request2size(bytes+1, nb); - (void)mutex_lock(&main_arena.mutex); - - if (chunk_is_mmapped(oldp)) { + if (bytes + 1 == 0) + { + __set_errno (ENOMEM); + return NULL; + } + if (oldmem == 0) + return malloc_check (bytes, NULL); + + if (bytes == 0) + { + free_check (oldmem, NULL); + return NULL; + } + (void) mutex_lock (&main_arena.mutex); + const mchunkptr oldp = mem2chunk_check (oldmem, &magic_p); + (void) mutex_unlock (&main_arena.mutex); + if (!oldp) + { + malloc_printerr (check_action, "realloc(): invalid pointer", oldmem); + return malloc_check (bytes, NULL); + } + const INTERNAL_SIZE_T oldsize = chunksize (oldp); + + checked_request2size (bytes + 1, nb); + (void) mutex_lock (&main_arena.mutex); + + if (chunk_is_mmapped (oldp)) + { #if HAVE_MREMAP - mchunkptr newp = mremap_chunk(oldp, nb); - if(newp) - newmem = chunk2mem(newp); - else + mchunkptr newp = mremap_chunk (oldp, nb); + if (newp) + newmem = chunk2mem (newp); + else #endif - { - /* Note the extra SIZE_SZ overhead. */ - if(oldsize - SIZE_SZ >= nb) - newmem = oldmem; /* do nothing */ - else { - /* Must alloc, copy, free. */ - if (top_check() >= 0) - newmem = _int_malloc(&main_arena, bytes+1); - if (newmem) { - memcpy(newmem, oldmem, oldsize - 2*SIZE_SZ); - munmap_chunk(oldp); - } + { + /* Note the extra SIZE_SZ overhead. */ + if (oldsize - SIZE_SZ >= nb) + newmem = oldmem; /* do nothing */ + else + { + /* Must alloc, copy, free. */ + if (top_check () >= 0) + newmem = _int_malloc (&main_arena, bytes + 1); + if (newmem) + { + memcpy (newmem, oldmem, oldsize - 2 * SIZE_SZ); + munmap_chunk (oldp); + } + } } } - } else { - if (top_check() >= 0) { - INTERNAL_SIZE_T nb; - checked_request2size(bytes + 1, nb); - newmem = _int_realloc(&main_arena, oldp, oldsize, nb); + else + { + if (top_check () >= 0) + { + INTERNAL_SIZE_T nb; + checked_request2size (bytes + 1, nb); + newmem = _int_realloc (&main_arena, oldp, oldsize, nb); + } } - } /* mem2chunk_check changed the magic byte in the old chunk. If newmem is NULL, then the old chunk will still be used though, so we need to invert that change here. */ - if (newmem == NULL) *magic_p ^= 0xFF; + if (newmem == NULL) + *magic_p ^= 0xFF; - (void)mutex_unlock(&main_arena.mutex); + (void) mutex_unlock (&main_arena.mutex); - return mem2mem_check(newmem, bytes); + return mem2mem_check (newmem, bytes); } -static void* -memalign_check(size_t alignment, size_t bytes, const void *caller) +static void * +memalign_check (size_t alignment, size_t bytes, const void *caller) { - void* mem; + void *mem; + + if (alignment <= MALLOC_ALIGNMENT) + return malloc_check (bytes, NULL); - if (alignment <= MALLOC_ALIGNMENT) return malloc_check(bytes, NULL); - if (alignment < MINSIZE) alignment = MINSIZE; + if (alignment < MINSIZE) + alignment = MINSIZE; /* If the alignment is greater than SIZE_MAX / 2 + 1 it cannot be a power of 2 and will cause overflow in the check below. */ @@ -377,17 +414,19 @@ memalign_check(size_t alignment, size_t bytes, const void *caller) } /* Make sure alignment is power of 2. */ - if (!powerof2(alignment)) { - size_t a = MALLOC_ALIGNMENT * 2; - while (a < alignment) a <<= 1; - alignment = a; - } - - (void)mutex_lock(&main_arena.mutex); - mem = (top_check() >= 0) ? _int_memalign(&main_arena, alignment, bytes+1) : - NULL; - (void)mutex_unlock(&main_arena.mutex); - return mem2mem_check(mem, bytes); + if (!powerof2 (alignment)) + { + size_t a = MALLOC_ALIGNMENT * 2; + while (a < alignment) + a <<= 1; + alignment = a; + } + + (void) mutex_lock (&main_arena.mutex); + mem = (top_check () >= 0) ? _int_memalign (&main_arena, alignment, bytes + 1) : + NULL; + (void) mutex_unlock (&main_arena.mutex); + return mem2mem_check (mem, bytes); } @@ -408,59 +447,63 @@ memalign_check(size_t alignment, size_t bytes, const void *caller) then the hooks are reset to 0. */ #define MALLOC_STATE_MAGIC 0x444c4541l -#define MALLOC_STATE_VERSION (0*0x100l + 4l) /* major*0x100 + minor */ - -struct malloc_save_state { - long magic; - long version; - mbinptr av[NBINS * 2 + 2]; - char* sbrk_base; - int sbrked_mem_bytes; +#define MALLOC_STATE_VERSION (0 * 0x100l + 4l) /* major*0x100 + minor */ + +struct malloc_save_state +{ + long magic; + long version; + mbinptr av[NBINS * 2 + 2]; + char *sbrk_base; + int sbrked_mem_bytes; unsigned long trim_threshold; unsigned long top_pad; - unsigned int n_mmaps_max; + unsigned int n_mmaps_max; unsigned long mmap_threshold; - int check_action; + int check_action; unsigned long max_sbrked_mem; unsigned long max_total_mem; - unsigned int n_mmaps; - unsigned int max_n_mmaps; + unsigned int n_mmaps; + unsigned int max_n_mmaps; unsigned long mmapped_mem; unsigned long max_mmapped_mem; - int using_malloc_checking; + int using_malloc_checking; unsigned long max_fast; unsigned long arena_test; unsigned long arena_max; unsigned long narenas; }; -void* -__malloc_get_state(void) +void * +__malloc_get_state (void) { - struct malloc_save_state* ms; + struct malloc_save_state *ms; int i; mbinptr b; - ms = (struct malloc_save_state*)__libc_malloc(sizeof(*ms)); + ms = (struct malloc_save_state *) __libc_malloc (sizeof (*ms)); if (!ms) return 0; - (void)mutex_lock(&main_arena.mutex); - malloc_consolidate(&main_arena); + + (void) mutex_lock (&main_arena.mutex); + malloc_consolidate (&main_arena); ms->magic = MALLOC_STATE_MAGIC; ms->version = MALLOC_STATE_VERSION; ms->av[0] = 0; ms->av[1] = 0; /* used to be binblocks, now no longer used */ - ms->av[2] = top(&main_arena); + ms->av[2] = top (&main_arena); ms->av[3] = 0; /* used to be undefined */ - for(i=1; i<NBINS; i++) { - b = bin_at(&main_arena, i); - if(first(b) == b) - ms->av[2*i+2] = ms->av[2*i+3] = 0; /* empty bin */ - else { - ms->av[2*i+2] = first(b); - ms->av[2*i+3] = last(b); + for (i = 1; i < NBINS; i++) + { + b = bin_at (&main_arena, i); + if (first (b) == b) + ms->av[2 * i + 2] = ms->av[2 * i + 3] = 0; /* empty bin */ + else + { + ms->av[2 * i + 2] = first (b); + ms->av[2 * i + 3] = last (b); + } } - } ms->sbrk_base = mp_.sbrk_base; ms->sbrked_mem_bytes = main_arena.system_mem; ms->trim_threshold = mp_.trim_threshold; @@ -475,78 +518,92 @@ __malloc_get_state(void) ms->mmapped_mem = mp_.mmapped_mem; ms->max_mmapped_mem = mp_.max_mmapped_mem; ms->using_malloc_checking = using_malloc_checking; - ms->max_fast = get_max_fast(); + ms->max_fast = get_max_fast (); ms->arena_test = mp_.arena_test; ms->arena_max = mp_.arena_max; ms->narenas = narenas; - (void)mutex_unlock(&main_arena.mutex); - return (void*)ms; + (void) mutex_unlock (&main_arena.mutex); + return (void *) ms; } int -__malloc_set_state(void* msptr) +__malloc_set_state (void *msptr) { - struct malloc_save_state* ms = (struct malloc_save_state*)msptr; + struct malloc_save_state *ms = (struct malloc_save_state *) msptr; size_t i; mbinptr b; disallow_malloc_check = 1; - ptmalloc_init(); - if(ms->magic != MALLOC_STATE_MAGIC) return -1; + ptmalloc_init (); + if (ms->magic != MALLOC_STATE_MAGIC) + return -1; + /* Must fail if the major version is too high. */ - if((ms->version & ~0xffl) > (MALLOC_STATE_VERSION & ~0xffl)) return -2; - (void)mutex_lock(&main_arena.mutex); + if ((ms->version & ~0xffl) > (MALLOC_STATE_VERSION & ~0xffl)) + return -2; + + (void) mutex_lock (&main_arena.mutex); /* There are no fastchunks. */ - clear_fastchunks(&main_arena); + clear_fastchunks (&main_arena); if (ms->version >= 4) - set_max_fast(ms->max_fast); + set_max_fast (ms->max_fast); else - set_max_fast(64); /* 64 used to be the value we always used. */ - for (i=0; i<NFASTBINS; ++i) + set_max_fast (64); /* 64 used to be the value we always used. */ + for (i = 0; i < NFASTBINS; ++i) fastbin (&main_arena, i) = 0; - for (i=0; i<BINMAPSIZE; ++i) + for (i = 0; i < BINMAPSIZE; ++i) main_arena.binmap[i] = 0; - top(&main_arena) = ms->av[2]; + top (&main_arena) = ms->av[2]; main_arena.last_remainder = 0; - for(i=1; i<NBINS; i++) { - b = bin_at(&main_arena, i); - if(ms->av[2*i+2] == 0) { - assert(ms->av[2*i+3] == 0); - first(b) = last(b) = b; - } else { - if(ms->version >= 3 && - (i<NSMALLBINS || (largebin_index(chunksize(ms->av[2*i+2]))==i && - largebin_index(chunksize(ms->av[2*i+3]))==i))) { - first(b) = ms->av[2*i+2]; - last(b) = ms->av[2*i+3]; - /* Make sure the links to the bins within the heap are correct. */ - first(b)->bk = b; - last(b)->fd = b; - /* Set bit in binblocks. */ - mark_bin(&main_arena, i); - } else { - /* Oops, index computation from chunksize must have changed. - Link the whole list into unsorted_chunks. */ - first(b) = last(b) = b; - b = unsorted_chunks(&main_arena); - ms->av[2*i+2]->bk = b; - ms->av[2*i+3]->fd = b->fd; - b->fd->bk = ms->av[2*i+3]; - b->fd = ms->av[2*i+2]; - } + for (i = 1; i < NBINS; i++) + { + b = bin_at (&main_arena, i); + if (ms->av[2 * i + 2] == 0) + { + assert (ms->av[2 * i + 3] == 0); + first (b) = last (b) = b; + } + else + { + if (ms->version >= 3 && + (i < NSMALLBINS || (largebin_index (chunksize (ms->av[2 * i + 2])) == i && + largebin_index (chunksize (ms->av[2 * i + 3])) == i))) + { + first (b) = ms->av[2 * i + 2]; + last (b) = ms->av[2 * i + 3]; + /* Make sure the links to the bins within the heap are correct. */ + first (b)->bk = b; + last (b)->fd = b; + /* Set bit in binblocks. */ + mark_bin (&main_arena, i); + } + else + { + /* Oops, index computation from chunksize must have changed. + Link the whole list into unsorted_chunks. */ + first (b) = last (b) = b; + b = unsorted_chunks (&main_arena); + ms->av[2 * i + 2]->bk = b; + ms->av[2 * i + 3]->fd = b->fd; + b->fd->bk = ms->av[2 * i + 3]; + b->fd = ms->av[2 * i + 2]; + } + } } - } - if (ms->version < 3) { - /* Clear fd_nextsize and bk_nextsize fields. */ - b = unsorted_chunks(&main_arena)->fd; - while (b != unsorted_chunks(&main_arena)) { - if (!in_smallbin_range(chunksize(b))) { - b->fd_nextsize = NULL; - b->bk_nextsize = NULL; - } - b = b->fd; + if (ms->version < 3) + { + /* Clear fd_nextsize and bk_nextsize fields. */ + b = unsorted_chunks (&main_arena)->fd; + while (b != unsorted_chunks (&main_arena)) + { + if (!in_smallbin_range (chunksize (b))) + { + b->fd_nextsize = NULL; + b->bk_nextsize = NULL; + } + b = b->fd; + } } - } mp_.sbrk_base = ms->sbrk_base; main_arena.system_mem = ms->sbrked_mem_bytes; mp_.trim_threshold = ms->trim_threshold; @@ -560,28 +617,31 @@ __malloc_set_state(void* msptr) mp_.mmapped_mem = ms->mmapped_mem; mp_.max_mmapped_mem = ms->max_mmapped_mem; /* add version-dependent code here */ - if (ms->version >= 1) { - /* Check whether it is safe to enable malloc checking, or whether - it is necessary to disable it. */ - if (ms->using_malloc_checking && !using_malloc_checking && - !disallow_malloc_check) - __malloc_check_init (); - else if (!ms->using_malloc_checking && using_malloc_checking) { - __malloc_hook = NULL; - __free_hook = NULL; - __realloc_hook = NULL; - __memalign_hook = NULL; - using_malloc_checking = 0; + if (ms->version >= 1) + { + /* Check whether it is safe to enable malloc checking, or whether + it is necessary to disable it. */ + if (ms->using_malloc_checking && !using_malloc_checking && + !disallow_malloc_check) + __malloc_check_init (); + else if (!ms->using_malloc_checking && using_malloc_checking) + { + __malloc_hook = NULL; + __free_hook = NULL; + __realloc_hook = NULL; + __memalign_hook = NULL; + using_malloc_checking = 0; + } } - } - if (ms->version >= 4) { - mp_.arena_test = ms->arena_test; - mp_.arena_max = ms->arena_max; - narenas = ms->narenas; - } - check_malloc_state(&main_arena); - - (void)mutex_unlock(&main_arena.mutex); + if (ms->version >= 4) + { + mp_.arena_test = ms->arena_test; + mp_.arena_max = ms->arena_max; + narenas = ms->narenas; + } + check_malloc_state (&main_arena); + + (void) mutex_unlock (&main_arena.mutex); return 0; } diff --git a/malloc/malloc.c b/malloc/malloc.c index 63d1d15..813e94e 100644 --- a/malloc/malloc.c +++ b/malloc/malloc.c @@ -353,10 +353,10 @@ __malloc_assert (const char *assertion, const char *file, unsigned int line, malloc_set_state than will returning blocks not adequately aligned for long double objects under -mlong-double-128. */ -# define MALLOC_ALIGNMENT (2 * SIZE_SZ < __alignof__ (long double) \ - ? __alignof__ (long double) : 2 * SIZE_SZ) +# define MALLOC_ALIGNMENT (2 *SIZE_SZ < __alignof__ (long double) \ + ? __alignof__ (long double) : 2 *SIZE_SZ) # else -# define MALLOC_ALIGNMENT (2 * SIZE_SZ) +# define MALLOC_ALIGNMENT (2 *SIZE_SZ) # endif #endif @@ -463,10 +463,10 @@ void *(*__morecore)(ptrdiff_t) = __default_morecore; some systems, if the application first decrements and then increments the break value, the contents of the reallocated space are unspecified. -*/ + */ #ifndef MORECORE_CLEARS -#define MORECORE_CLEARS 1 +# define MORECORE_CLEARS 1 #endif @@ -1232,11 +1232,11 @@ nextchunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Check if a request is so large that it would wrap around zero when padded and aligned. To simplify some other code, the bound is made low enough so that adding MINSIZE will also not wrap around zero. -*/ + */ #define REQUEST_OUT_OF_RANGE(req) \ - ((unsigned long)(req) >= \ - (unsigned long)(INTERNAL_SIZE_T)(-2 * MINSIZE)) + ((unsigned long) (req) >= \ + (unsigned long) (INTERNAL_SIZE_T) (-2 * MINSIZE)) /* pad request bytes into a usable size -- internal version */ @@ -1248,15 +1248,15 @@ nextchunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ /* Same, except also perform argument check */ #define checked_request2size(req, sz) \ - if (REQUEST_OUT_OF_RANGE(req)) { \ - __set_errno (ENOMEM); \ - return 0; \ - } \ - (sz) = request2size(req); + if (REQUEST_OUT_OF_RANGE (req)) { \ + __set_errno (ENOMEM); \ + return 0; \ + } \ + (sz) = request2size (req); /* - --------------- Physical chunk operations --------------- -*/ + --------------- Physical chunk operations --------------- + */ /* size field is or'ed with PREV_INUSE when previous adjacent chunk in use */ @@ -1283,49 +1283,49 @@ nextchunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ /* - Bits to mask off when extracting size + Bits to mask off when extracting size - Note: IS_MMAPPED is intentionally not masked off from size field in - macros for which mmapped chunks should never be seen. This should - cause helpful core dumps to occur if it is tried by accident by - people extending or adapting this malloc. -*/ -#define SIZE_BITS (PREV_INUSE|IS_MMAPPED|NON_MAIN_ARENA) + Note: IS_MMAPPED is intentionally not masked off from size field in + macros for which mmapped chunks should never be seen. This should + cause helpful core dumps to occur if it is tried by accident by + people extending or adapting this malloc. + */ +#define SIZE_BITS (PREV_INUSE | IS_MMAPPED | NON_MAIN_ARENA) /* Get size, ignoring use bits */ #define chunksize(p) ((p)->size & ~(SIZE_BITS)) /* Ptr to next physical malloc_chunk. */ -#define next_chunk(p) ((mchunkptr)( ((char*)(p)) + ((p)->size & ~SIZE_BITS) )) +#define next_chunk(p) ((mchunkptr) (((char *) (p)) + ((p)->size & ~SIZE_BITS))) /* Ptr to previous physical malloc_chunk */ -#define prev_chunk(p) ((mchunkptr)( ((char*)(p)) - ((p)->prev_size) )) +#define prev_chunk(p) ((mchunkptr) (((char *) (p)) - ((p)->prev_size))) /* Treat space at ptr + offset as a chunk */ -#define chunk_at_offset(p, s) ((mchunkptr)(((char*)(p)) + (s))) +#define chunk_at_offset(p, s) ((mchunkptr) (((char *) (p)) + (s))) /* extract p's inuse bit */ -#define inuse(p)\ -((((mchunkptr)(((char*)(p))+((p)->size & ~SIZE_BITS)))->size) & PREV_INUSE) +#define inuse(p) \ + ((((mchunkptr) (((char *) (p)) + ((p)->size & ~SIZE_BITS)))->size) & PREV_INUSE) /* set/clear chunk as being inuse without otherwise disturbing */ -#define set_inuse(p)\ -((mchunkptr)(((char*)(p)) + ((p)->size & ~SIZE_BITS)))->size |= PREV_INUSE +#define set_inuse(p) \ + ((mchunkptr) (((char *) (p)) + ((p)->size & ~SIZE_BITS)))->size |= PREV_INUSE -#define clear_inuse(p)\ -((mchunkptr)(((char*)(p)) + ((p)->size & ~SIZE_BITS)))->size &= ~(PREV_INUSE) +#define clear_inuse(p) \ + ((mchunkptr) (((char *) (p)) + ((p)->size & ~SIZE_BITS)))->size &= ~(PREV_INUSE) /* check/set/clear inuse bits in known places */ -#define inuse_bit_at_offset(p, s)\ - (((mchunkptr)(((char*)(p)) + (s)))->size & PREV_INUSE) +#define inuse_bit_at_offset(p, s) \ + (((mchunkptr) (((char *) (p)) + (s)))->size & PREV_INUSE) -#define set_inuse_bit_at_offset(p, s)\ - (((mchunkptr)(((char*)(p)) + (s)))->size |= PREV_INUSE) +#define set_inuse_bit_at_offset(p, s) \ + (((mchunkptr) (((char *) (p)) + (s)))->size |= PREV_INUSE) -#define clear_inuse_bit_at_offset(p, s)\ - (((mchunkptr)(((char*)(p)) + (s)))->size &= ~(PREV_INUSE)) +#define clear_inuse_bit_at_offset(p, s) \ + (((mchunkptr) (((char *) (p)) + (s)))->size &= ~(PREV_INUSE)) /* Set size at head, without disturbing its use bit */ @@ -1335,26 +1335,26 @@ nextchunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ #define set_head(p, s) ((p)->size = (s)) /* Set size at footer (only when chunk is not in use) */ -#define set_foot(p, s) (((mchunkptr)((char*)(p) + (s)))->prev_size = (s)) +#define set_foot(p, s) (((mchunkptr) ((char *) (p) + (s)))->prev_size = (s)) /* - -------------------- Internal data structures -------------------- + -------------------- Internal data structures -------------------- All internal state is held in an instance of malloc_state defined below. There are no other static variables, except in two optional cases: - * If USE_MALLOC_LOCK is defined, the mALLOC_MUTEx declared above. - * If mmap doesn't support MAP_ANONYMOUS, a dummy file descriptor + * If USE_MALLOC_LOCK is defined, the mALLOC_MUTEx declared above. + * If mmap doesn't support MAP_ANONYMOUS, a dummy file descriptor for mmap. Beware of lots of tricks that minimize the total bookkeeping space requirements. The result is a little over 1K bytes (for 4byte pointers and size_t.) -*/ + */ /* - Bins + Bins An array of bin headers for free chunks. Each bin is doubly linked. The bins are approximately proportionally (log) spaced. @@ -1387,17 +1387,17 @@ nextchunk-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ But to conserve space and improve locality, we allocate only the fd/bk pointers of bins, and then use repositioning tricks to treat these as the fields of a malloc_chunk*. -*/ + */ -typedef struct malloc_chunk* mbinptr; +typedef struct malloc_chunk *mbinptr; /* addressing -- note that bin_at(0) does not exist */ #define bin_at(m, i) \ (mbinptr) (((char *) &((m)->bins[((i) - 1) * 2])) \ - - offsetof (struct malloc_chunk, fd)) + - offsetof (struct malloc_chunk, fd)) /* analog of ++bin */ -#define next_bin(b) ((mbinptr)((char*)(b) + (sizeof(mchunkptr)<<1))) +#define next_bin(b) ((mbinptr) ((char *) (b) + (sizeof (mchunkptr) << 1))) /* Reminders about list directionality within bins */ #define first(b) ((b)->fd) @@ -1405,36 +1405,36 @@ typedef struct malloc_chunk* mbinptr; /* Take a chunk off a bin list */ #define unlink(P, BK, FD) { \ - FD = P->fd; \ - BK = P->bk; \ - if (__builtin_expect (FD->bk != P || BK->fd != P, 0)) \ - malloc_printerr (check_action, "corrupted double-linked list", P); \ - else { \ - FD->bk = BK; \ - BK->fd = FD; \ - if (!in_smallbin_range (P->size) \ - && __builtin_expect (P->fd_nextsize != NULL, 0)) { \ - assert (P->fd_nextsize->bk_nextsize == P); \ - assert (P->bk_nextsize->fd_nextsize == P); \ - if (FD->fd_nextsize == NULL) { \ - if (P->fd_nextsize == P) \ - FD->fd_nextsize = FD->bk_nextsize = FD; \ - else { \ - FD->fd_nextsize = P->fd_nextsize; \ - FD->bk_nextsize = P->bk_nextsize; \ - P->fd_nextsize->bk_nextsize = FD; \ - P->bk_nextsize->fd_nextsize = FD; \ - } \ - } else { \ - P->fd_nextsize->bk_nextsize = P->bk_nextsize; \ - P->bk_nextsize->fd_nextsize = P->fd_nextsize; \ - } \ - } \ - } \ + FD = P->fd; \ + BK = P->bk; \ + if (__builtin_expect (FD->bk != P || BK->fd != P, 0)) \ + malloc_printerr (check_action, "corrupted double-linked list", P); \ + else { \ + FD->bk = BK; \ + BK->fd = FD; \ + if (!in_smallbin_range (P->size) \ + && __builtin_expect (P->fd_nextsize != NULL, 0)) { \ + assert (P->fd_nextsize->bk_nextsize == P); \ + assert (P->bk_nextsize->fd_nextsize == P); \ + if (FD->fd_nextsize == NULL) { \ + if (P->fd_nextsize == P) \ + FD->fd_nextsize = FD->bk_nextsize = FD; \ + else { \ + FD->fd_nextsize = P->fd_nextsize; \ + FD->bk_nextsize = P->bk_nextsize; \ + P->fd_nextsize->bk_nextsize = FD; \ + P->bk_nextsize->fd_nextsize = FD; \ + } \ + } else { \ + P->fd_nextsize->bk_nextsize = P->bk_nextsize; \ + P->bk_nextsize->fd_nextsize = P->fd_nextsize; \ + } \ + } \ + } \ } /* - Indexing + Indexing Bins for sizes < 512 bytes contain chunks of all the same size, spaced 8 bytes apart. Larger bins are approximately logarithmically spaced: @@ -1455,7 +1455,7 @@ typedef struct malloc_chunk* mbinptr; Bin 0 does not exist. Bin 1 is the unordered list; if that would be a valid chunk size the small bins are bumped up one. -*/ + */ #define NBINS 128 #define NSMALLBINS 64 @@ -1464,38 +1464,38 @@ typedef struct malloc_chunk* mbinptr; #define MIN_LARGE_SIZE ((NSMALLBINS - SMALLBIN_CORRECTION) * SMALLBIN_WIDTH) #define in_smallbin_range(sz) \ - ((unsigned long)(sz) < (unsigned long)MIN_LARGE_SIZE) + ((unsigned long) (sz) < (unsigned long) MIN_LARGE_SIZE) #define smallbin_index(sz) \ - ((SMALLBIN_WIDTH == 16 ? (((unsigned)(sz)) >> 4) : (((unsigned)(sz)) >> 3)) \ + ((SMALLBIN_WIDTH == 16 ? (((unsigned) (sz)) >> 4) : (((unsigned) (sz)) >> 3))\ + SMALLBIN_CORRECTION) #define largebin_index_32(sz) \ -(((((unsigned long)(sz)) >> 6) <= 38)? 56 + (((unsigned long)(sz)) >> 6): \ - ((((unsigned long)(sz)) >> 9) <= 20)? 91 + (((unsigned long)(sz)) >> 9): \ - ((((unsigned long)(sz)) >> 12) <= 10)? 110 + (((unsigned long)(sz)) >> 12): \ - ((((unsigned long)(sz)) >> 15) <= 4)? 119 + (((unsigned long)(sz)) >> 15): \ - ((((unsigned long)(sz)) >> 18) <= 2)? 124 + (((unsigned long)(sz)) >> 18): \ - 126) + (((((unsigned long) (sz)) >> 6) <= 38) ? 56 + (((unsigned long) (sz)) >> 6) :\ + ((((unsigned long) (sz)) >> 9) <= 20) ? 91 + (((unsigned long) (sz)) >> 9) :\ + ((((unsigned long) (sz)) >> 12) <= 10) ? 110 + (((unsigned long) (sz)) >> 12) :\ + ((((unsigned long) (sz)) >> 15) <= 4) ? 119 + (((unsigned long) (sz)) >> 15) :\ + ((((unsigned long) (sz)) >> 18) <= 2) ? 124 + (((unsigned long) (sz)) >> 18) :\ + 126) #define largebin_index_32_big(sz) \ -(((((unsigned long)(sz)) >> 6) <= 45)? 49 + (((unsigned long)(sz)) >> 6): \ - ((((unsigned long)(sz)) >> 9) <= 20)? 91 + (((unsigned long)(sz)) >> 9): \ - ((((unsigned long)(sz)) >> 12) <= 10)? 110 + (((unsigned long)(sz)) >> 12): \ - ((((unsigned long)(sz)) >> 15) <= 4)? 119 + (((unsigned long)(sz)) >> 15): \ - ((((unsigned long)(sz)) >> 18) <= 2)? 124 + (((unsigned long)(sz)) >> 18): \ - 126) + (((((unsigned long) (sz)) >> 6) <= 45) ? 49 + (((unsigned long) (sz)) >> 6) :\ + ((((unsigned long) (sz)) >> 9) <= 20) ? 91 + (((unsigned long) (sz)) >> 9) :\ + ((((unsigned long) (sz)) >> 12) <= 10) ? 110 + (((unsigned long) (sz)) >> 12) :\ + ((((unsigned long) (sz)) >> 15) <= 4) ? 119 + (((unsigned long) (sz)) >> 15) :\ + ((((unsigned long) (sz)) >> 18) <= 2) ? 124 + (((unsigned long) (sz)) >> 18) :\ + 126) // XXX It remains to be seen whether it is good to keep the widths of // XXX the buckets the same or whether it should be scaled by a factor // XXX of two as well. #define largebin_index_64(sz) \ -(((((unsigned long)(sz)) >> 6) <= 48)? 48 + (((unsigned long)(sz)) >> 6): \ - ((((unsigned long)(sz)) >> 9) <= 20)? 91 + (((unsigned long)(sz)) >> 9): \ - ((((unsigned long)(sz)) >> 12) <= 10)? 110 + (((unsigned long)(sz)) >> 12): \ - ((((unsigned long)(sz)) >> 15) <= 4)? 119 + (((unsigned long)(sz)) >> 15): \ - ((((unsigned long)(sz)) >> 18) <= 2)? 124 + (((unsigned long)(sz)) >> 18): \ - 126) + (((((unsigned long) (sz)) >> 6) <= 48) ? 48 + (((unsigned long) (sz)) >> 6) :\ + ((((unsigned long) (sz)) >> 9) <= 20) ? 91 + (((unsigned long) (sz)) >> 9) :\ + ((((unsigned long) (sz)) >> 12) <= 10) ? 110 + (((unsigned long) (sz)) >> 12) :\ + ((((unsigned long) (sz)) >> 15) <= 4) ? 119 + (((unsigned long) (sz)) >> 15) :\ + ((((unsigned long) (sz)) >> 18) <= 2) ? 124 + (((unsigned long) (sz)) >> 18) :\ + 126) #define largebin_index(sz) \ (SIZE_SZ == 8 ? largebin_index_64 (sz) \ @@ -1503,11 +1503,11 @@ typedef struct malloc_chunk* mbinptr; : largebin_index_32 (sz)) #define bin_index(sz) \ - ((in_smallbin_range(sz)) ? smallbin_index(sz) : largebin_index(sz)) + ((in_smallbin_range (sz)) ? smallbin_index (sz) : largebin_index (sz)) /* - Unsorted chunks + Unsorted chunks All remainders from chunk splits, as well as all returned chunks, are first placed in the "unsorted" bin. They are then placed @@ -1518,13 +1518,13 @@ typedef struct malloc_chunk* mbinptr; The NON_MAIN_ARENA flag is never set for unsorted chunks, so it does not have to be taken into account in size comparisons. -*/ + */ /* The otherwise unindexable 1-bin is used to hold unsorted chunks. */ -#define unsorted_chunks(M) (bin_at(M, 1)) +#define unsorted_chunks(M) (bin_at (M, 1)) /* - Top + Top The top-most available chunk (i.e., the one bordering the end of available memory) is treated specially. It is never included in @@ -1539,13 +1539,13 @@ typedef struct malloc_chunk* mbinptr; interval between initialization and the first call to sysmalloc. (This is somewhat delicate, since it relies on the 2 preceding words to be zero during this interval as well.) -*/ + */ /* Conveniently, the unsorted bin can be used as dummy top on first call */ -#define initial_top(M) (unsorted_chunks(M)) +#define initial_top(M) (unsorted_chunks (M)) /* - Binmap + Binmap To help compensate for the large number of bins, a one-level index structure is used for bin-by-bin searching. `binmap' is a @@ -1553,7 +1553,7 @@ typedef struct malloc_chunk* mbinptr; be skipped over during during traversals. The bits are NOT always cleared as soon as bins are empty, but instead only when they are noticed to be empty during traversal in malloc. -*/ + */ /* Conservatively use 32 bits per map word, even if on 64bit system */ #define BINMAPSHIFT 5 @@ -1561,14 +1561,14 @@ typedef struct malloc_chunk* mbinptr; #define BINMAPSIZE (NBINS / BITSPERMAP) #define idx2block(i) ((i) >> BINMAPSHIFT) -#define idx2bit(i) ((1U << ((i) & ((1U << BINMAPSHIFT)-1)))) +#define idx2bit(i) ((1U << ((i) & ((1U << BINMAPSHIFT) - 1)))) -#define mark_bin(m,i) ((m)->binmap[idx2block(i)] |= idx2bit(i)) -#define unmark_bin(m,i) ((m)->binmap[idx2block(i)] &= ~(idx2bit(i))) -#define get_binmap(m,i) ((m)->binmap[idx2block(i)] & idx2bit(i)) +#define mark_bin(m, i) ((m)->binmap[idx2block (i)] |= idx2bit (i)) +#define unmark_bin(m, i) ((m)->binmap[idx2block (i)] &= ~(idx2bit (i))) +#define get_binmap(m, i) ((m)->binmap[idx2block (i)] & idx2bit (i)) /* - Fastbins + Fastbins An array of lists holding recently freed small chunks. Fastbins are not doubly linked. It is faster to single-link them, and @@ -1582,69 +1582,69 @@ typedef struct malloc_chunk* mbinptr; be consolidated with other free chunks. malloc_consolidate releases all chunks in fastbins and consolidates them with other free chunks. -*/ + */ -typedef struct malloc_chunk* mfastbinptr; +typedef struct malloc_chunk *mfastbinptr; #define fastbin(ar_ptr, idx) ((ar_ptr)->fastbinsY[idx]) /* offset 2 to use otherwise unindexable first 2 bins */ #define fastbin_index(sz) \ - ((((unsigned int)(sz)) >> (SIZE_SZ == 8 ? 4 : 3)) - 2) + ((((unsigned int) (sz)) >> (SIZE_SZ == 8 ? 4 : 3)) - 2) /* The maximum fastbin request size we support */ #define MAX_FAST_SIZE (80 * SIZE_SZ / 4) -#define NFASTBINS (fastbin_index(request2size(MAX_FAST_SIZE))+1) +#define NFASTBINS (fastbin_index (request2size (MAX_FAST_SIZE)) + 1) /* - FASTBIN_CONSOLIDATION_THRESHOLD is the size of a chunk in free() - that triggers automatic consolidation of possibly-surrounding - fastbin chunks. This is a heuristic, so the exact value should not - matter too much. It is defined at half the default trim threshold as a - compromise heuristic to only attempt consolidation if it is likely - to lead to trimming. However, it is not dynamically tunable, since - consolidation reduces fragmentation surrounding large chunks even - if trimming is not used. -*/ + FASTBIN_CONSOLIDATION_THRESHOLD is the size of a chunk in free() + that triggers automatic consolidation of possibly-surrounding + fastbin chunks. This is a heuristic, so the exact value should not + matter too much. It is defined at half the default trim threshold as a + compromise heuristic to only attempt consolidation if it is likely + to lead to trimming. However, it is not dynamically tunable, since + consolidation reduces fragmentation surrounding large chunks even + if trimming is not used. + */ #define FASTBIN_CONSOLIDATION_THRESHOLD (65536UL) /* - Since the lowest 2 bits in max_fast don't matter in size comparisons, - they are used as flags. -*/ + Since the lowest 2 bits in max_fast don't matter in size comparisons, + they are used as flags. + */ /* - FASTCHUNKS_BIT held in max_fast indicates that there are probably - some fastbin chunks. It is set true on entering a chunk into any - fastbin, and cleared only in malloc_consolidate. + FASTCHUNKS_BIT held in max_fast indicates that there are probably + some fastbin chunks. It is set true on entering a chunk into any + fastbin, and cleared only in malloc_consolidate. - The truth value is inverted so that have_fastchunks will be true - upon startup (since statics are zero-filled), simplifying - initialization checks. -*/ + The truth value is inverted so that have_fastchunks will be true + upon startup (since statics are zero-filled), simplifying + initialization checks. + */ #define FASTCHUNKS_BIT (1U) -#define have_fastchunks(M) (((M)->flags & FASTCHUNKS_BIT) == 0) +#define have_fastchunks(M) (((M)->flags & FASTCHUNKS_BIT) == 0) #define clear_fastchunks(M) catomic_or (&(M)->flags, FASTCHUNKS_BIT) #define set_fastchunks(M) catomic_and (&(M)->flags, ~FASTCHUNKS_BIT) /* - NONCONTIGUOUS_BIT indicates that MORECORE does not return contiguous - regions. Otherwise, contiguity is exploited in merging together, - when possible, results from consecutive MORECORE calls. + NONCONTIGUOUS_BIT indicates that MORECORE does not return contiguous + regions. Otherwise, contiguity is exploited in merging together, + when possible, results from consecutive MORECORE calls. - The initial value comes from MORECORE_CONTIGUOUS, but is - changed dynamically if mmap is ever used as an sbrk substitute. -*/ + The initial value comes from MORECORE_CONTIGUOUS, but is + changed dynamically if mmap is ever used as an sbrk substitute. + */ #define NONCONTIGUOUS_BIT (2U) -#define contiguous(M) (((M)->flags & NONCONTIGUOUS_BIT) == 0) -#define noncontiguous(M) (((M)->flags & NONCONTIGUOUS_BIT) != 0) -#define set_noncontiguous(M) ((M)->flags |= NONCONTIGUOUS_BIT) +#define contiguous(M) (((M)->flags & NONCONTIGUOUS_BIT) == 0) +#define noncontiguous(M) (((M)->flags & NONCONTIGUOUS_BIT) != 0) +#define set_noncontiguous(M) ((M)->flags |= NONCONTIGUOUS_BIT) #define set_contiguous(M) ((M)->flags &= ~NONCONTIGUOUS_BIT) /* @@ -1652,19 +1652,20 @@ typedef struct malloc_chunk* mfastbinptr; Use impossibly small value if 0. Precondition: there are no existing fastbin chunks. Setting the value clears fastchunk bit but preserves noncontiguous bit. -*/ + */ #define set_max_fast(s) \ global_max_fast = (((s) == 0) \ - ? SMALLBIN_WIDTH: ((s + SIZE_SZ) & ~MALLOC_ALIGN_MASK)) + ? SMALLBIN_WIDTH : ((s + SIZE_SZ) & ~MALLOC_ALIGN_MASK)) #define get_max_fast() global_max_fast /* ----------- Internal state representation and initialization ----------- -*/ + */ -struct malloc_state { +struct malloc_state +{ /* Serialize access. */ mutex_t mutex; @@ -1677,19 +1678,19 @@ struct malloc_state { #endif /* Fastbins */ - mfastbinptr fastbinsY[NFASTBINS]; + mfastbinptr fastbinsY[NFASTBINS]; /* Base of the topmost chunk -- not otherwise kept in a bin */ - mchunkptr top; + mchunkptr top; /* The remainder from the most recent split of a small request */ - mchunkptr last_remainder; + mchunkptr last_remainder; /* Normal bins packed as described above */ - mchunkptr bins[NBINS * 2 - 2]; + mchunkptr bins[NBINS * 2 - 2]; /* Bitmap of bins */ - unsigned int binmap[BINMAPSIZE]; + unsigned int binmap[BINMAPSIZE]; /* Linked list */ struct malloc_state *next; @@ -1702,32 +1703,33 @@ struct malloc_state { INTERNAL_SIZE_T max_system_mem; }; -struct malloc_par { +struct malloc_par +{ /* Tunable parameters */ - unsigned long trim_threshold; - INTERNAL_SIZE_T top_pad; - INTERNAL_SIZE_T mmap_threshold; - INTERNAL_SIZE_T arena_test; - INTERNAL_SIZE_T arena_max; + unsigned long trim_threshold; + INTERNAL_SIZE_T top_pad; + INTERNAL_SIZE_T mmap_threshold; + INTERNAL_SIZE_T arena_test; + INTERNAL_SIZE_T arena_max; /* Memory map support */ - int n_mmaps; - int n_mmaps_max; - int max_n_mmaps; + int n_mmaps; + int n_mmaps_max; + int max_n_mmaps; /* the mmap_threshold is dynamic, until the user sets it manually, at which point we need to disable any dynamic behavior. */ - int no_dyn_threshold; + int no_dyn_threshold; /* Statistics */ - INTERNAL_SIZE_T mmapped_mem; + INTERNAL_SIZE_T mmapped_mem; /*INTERNAL_SIZE_T sbrked_mem;*/ /*INTERNAL_SIZE_T max_sbrked_mem;*/ - INTERNAL_SIZE_T max_mmapped_mem; - INTERNAL_SIZE_T max_total_mem; /* only kept for NO_THREADS */ + INTERNAL_SIZE_T max_mmapped_mem; + INTERNAL_SIZE_T max_total_mem; /* only kept for NO_THREADS */ /* First address handed out by MORECORE/sbrk. */ - char* sbrk_base; + char *sbrk_base; }; /* There are several instances of this struct ("arenas") in this @@ -1737,22 +1739,22 @@ struct malloc_par { is initialized to all zeroes (as is true of C statics). */ static struct malloc_state main_arena = - { - .mutex = MUTEX_INITIALIZER, - .next = &main_arena - }; +{ + .mutex = MUTEX_INITIALIZER, + .next = &main_arena +}; /* There is only one instance of the malloc parameters. */ static struct malloc_par mp_ = - { - .top_pad = DEFAULT_TOP_PAD, - .n_mmaps_max = DEFAULT_MMAP_MAX, - .mmap_threshold = DEFAULT_MMAP_THRESHOLD, - .trim_threshold = DEFAULT_TRIM_THRESHOLD, -# define NARENAS_FROM_NCORES(n) ((n) * (sizeof(long) == 4 ? 2 : 8)) - .arena_test = NARENAS_FROM_NCORES (1) - }; +{ + .top_pad = DEFAULT_TOP_PAD, + .n_mmaps_max = DEFAULT_MMAP_MAX, + .mmap_threshold = DEFAULT_MMAP_THRESHOLD, + .trim_threshold = DEFAULT_TRIM_THRESHOLD, +#define NARENAS_FROM_NCORES(n) ((n) * (sizeof (long) == 4 ? 2 : 8)) + .arena_test = NARENAS_FROM_NCORES (1) +}; /* Non public mallopt parameters. */ @@ -1764,44 +1766,46 @@ static struct malloc_par mp_ = static INTERNAL_SIZE_T global_max_fast; /* - Initialize a malloc_state struct. + Initialize a malloc_state struct. - This is called only from within malloc_consolidate, which needs - be called in the same contexts anyway. It is never called directly - outside of malloc_consolidate because some optimizing compilers try - to inline it at all call points, which turns out not to be an - optimization at all. (Inlining it in malloc_consolidate is fine though.) -*/ + This is called only from within malloc_consolidate, which needs + be called in the same contexts anyway. It is never called directly + outside of malloc_consolidate because some optimizing compilers try + to inline it at all call points, which turns out not to be an + optimization at all. (Inlining it in malloc_consolidate is fine though.) + */ -static void malloc_init_state(mstate av) +static void +malloc_init_state (mstate av) { - int i; + int i; mbinptr bin; /* Establish circular links for normal bins */ - for (i = 1; i < NBINS; ++i) { - bin = bin_at(av,i); - bin->fd = bin->bk = bin; - } + for (i = 1; i < NBINS; ++i) + { + bin = bin_at (av, i); + bin->fd = bin->bk = bin; + } #if MORECORE_CONTIGUOUS if (av != &main_arena) #endif - set_noncontiguous(av); + set_noncontiguous (av); if (av == &main_arena) - set_max_fast(DEFAULT_MXFAST); + set_max_fast (DEFAULT_MXFAST); av->flags |= FASTCHUNKS_BIT; - av->top = initial_top(av); + av->top = initial_top (av); } /* Other internal utilities operating on mstates -*/ + */ -static void* sysmalloc(INTERNAL_SIZE_T, mstate); -static int systrim(size_t, mstate); -static void malloc_consolidate(mstate); +static void *sysmalloc (INTERNAL_SIZE_T, mstate); +static int systrim (size_t, mstate); +static void malloc_consolidate (mstate); /* -------------- Early definitions for debugging hooks ---------------- */ @@ -1815,31 +1819,31 @@ static void malloc_consolidate(mstate); #endif /* Forward declarations. */ -static void* malloc_hook_ini (size_t sz, - const void *caller) __THROW; -static void* realloc_hook_ini (void* ptr, size_t sz, - const void *caller) __THROW; -static void* memalign_hook_ini (size_t alignment, size_t sz, - const void *caller) __THROW; +static void *malloc_hook_ini (size_t sz, + const void *caller) __THROW; +static void *realloc_hook_ini (void *ptr, size_t sz, + const void *caller) __THROW; +static void *memalign_hook_ini (size_t alignment, size_t sz, + const void *caller) __THROW; void weak_variable (*__malloc_initialize_hook) (void) = NULL; void weak_variable (*__free_hook) (void *__ptr, - const void *) = NULL; + const void *) = NULL; void *weak_variable (*__malloc_hook) - (size_t __size, const void *) = malloc_hook_ini; + (size_t __size, const void *) = malloc_hook_ini; void *weak_variable (*__realloc_hook) - (void *__ptr, size_t __size, const void *) - = realloc_hook_ini; + (void *__ptr, size_t __size, const void *) + = realloc_hook_ini; void *weak_variable (*__memalign_hook) - (size_t __alignment, size_t __size, const void *) - = memalign_hook_ini; + (size_t __alignment, size_t __size, const void *) + = memalign_hook_ini; void weak_variable (*__after_morecore_hook) (void) = NULL; /* ---------------- Error behavior ------------------------------------ */ #ifndef DEFAULT_CHECK_ACTION -#define DEFAULT_CHECK_ACTION 3 +# define DEFAULT_CHECK_ACTION 3 #endif static int check_action = DEFAULT_CHECK_ACTION; @@ -1871,207 +1875,220 @@ free_perturb (char *p, size_t n) #include "arena.c" /* - Debugging support + Debugging support - These routines make a number of assertions about the states - of data structures that should be true at all times. If any - are not true, it's very likely that a user program has somehow - trashed memory. (It's also possible that there is a coding error - in malloc. In which case, please report it!) -*/ + These routines make a number of assertions about the states + of data structures that should be true at all times. If any + are not true, it's very likely that a user program has somehow + trashed memory. (It's also possible that there is a coding error + in malloc. In which case, please report it!) + */ -#if ! MALLOC_DEBUG +#if !MALLOC_DEBUG -#define check_chunk(A,P) -#define check_free_chunk(A,P) -#define check_inuse_chunk(A,P) -#define check_remalloced_chunk(A,P,N) -#define check_malloced_chunk(A,P,N) -#define check_malloc_state(A) +# define check_chunk(A, P) +# define check_free_chunk(A, P) +# define check_inuse_chunk(A, P) +# define check_remalloced_chunk(A, P, N) +# define check_malloced_chunk(A, P, N) +# define check_malloc_state(A) #else -#define check_chunk(A,P) do_check_chunk(A,P) -#define check_free_chunk(A,P) do_check_free_chunk(A,P) -#define check_inuse_chunk(A,P) do_check_inuse_chunk(A,P) -#define check_remalloced_chunk(A,P,N) do_check_remalloced_chunk(A,P,N) -#define check_malloced_chunk(A,P,N) do_check_malloced_chunk(A,P,N) -#define check_malloc_state(A) do_check_malloc_state(A) +# define check_chunk(A, P) do_check_chunk (A, P) +# define check_free_chunk(A, P) do_check_free_chunk (A, P) +# define check_inuse_chunk(A, P) do_check_inuse_chunk (A, P) +# define check_remalloced_chunk(A, P, N) do_check_remalloced_chunk (A, P, N) +# define check_malloced_chunk(A, P, N) do_check_malloced_chunk (A, P, N) +# define check_malloc_state(A) do_check_malloc_state (A) /* - Properties of all chunks -*/ + Properties of all chunks + */ -static void do_check_chunk(mstate av, mchunkptr p) +static void +do_check_chunk (mstate av, mchunkptr p) { - unsigned long sz = chunksize(p); + unsigned long sz = chunksize (p); /* min and max possible addresses assuming contiguous allocation */ - char* max_address = (char*)(av->top) + chunksize(av->top); - char* min_address = max_address - av->system_mem; + char *max_address = (char *) (av->top) + chunksize (av->top); + char *min_address = max_address - av->system_mem; - if (!chunk_is_mmapped(p)) { - - /* Has legal address ... */ - if (p != av->top) { - if (contiguous(av)) { - assert(((char*)p) >= min_address); - assert(((char*)p + sz) <= ((char*)(av->top))); - } - } - else { - /* top size is always at least MINSIZE */ - assert((unsigned long)(sz) >= MINSIZE); - /* top predecessor always marked inuse */ - assert(prev_inuse(p)); + if (!chunk_is_mmapped (p)) + { + /* Has legal address ... */ + if (p != av->top) + { + if (contiguous (av)) + { + assert (((char *) p) >= min_address); + assert (((char *) p + sz) <= ((char *) (av->top))); + } + } + else + { + /* top size is always at least MINSIZE */ + assert ((unsigned long) (sz) >= MINSIZE); + /* top predecessor always marked inuse */ + assert (prev_inuse (p)); + } } - - } - else { - /* address is outside main heap */ - if (contiguous(av) && av->top != initial_top(av)) { - assert(((char*)p) < min_address || ((char*)p) >= max_address); + else + { + /* address is outside main heap */ + if (contiguous (av) && av->top != initial_top (av)) + { + assert (((char *) p) < min_address || ((char *) p) >= max_address); + } + /* chunk is page-aligned */ + assert (((p->prev_size + sz) & (GLRO (dl_pagesize) - 1)) == 0); + /* mem is aligned */ + assert (aligned_OK (chunk2mem (p))); } - /* chunk is page-aligned */ - assert(((p->prev_size + sz) & (GLRO(dl_pagesize)-1)) == 0); - /* mem is aligned */ - assert(aligned_OK(chunk2mem(p))); - } } /* - Properties of free chunks -*/ + Properties of free chunks + */ -static void do_check_free_chunk(mstate av, mchunkptr p) +static void +do_check_free_chunk (mstate av, mchunkptr p) { - INTERNAL_SIZE_T sz = p->size & ~(PREV_INUSE|NON_MAIN_ARENA); - mchunkptr next = chunk_at_offset(p, sz); + INTERNAL_SIZE_T sz = p->size & ~(PREV_INUSE | NON_MAIN_ARENA); + mchunkptr next = chunk_at_offset (p, sz); - do_check_chunk(av, p); + do_check_chunk (av, p); /* Chunk must claim to be free ... */ - assert(!inuse(p)); - assert (!chunk_is_mmapped(p)); + assert (!inuse (p)); + assert (!chunk_is_mmapped (p)); /* Unless a special marker, must have OK fields */ - if ((unsigned long)(sz) >= MINSIZE) - { - assert((sz & MALLOC_ALIGN_MASK) == 0); - assert(aligned_OK(chunk2mem(p))); - /* ... matching footer field */ - assert(next->prev_size == sz); - /* ... and is fully consolidated */ - assert(prev_inuse(p)); - assert (next == av->top || inuse(next)); - - /* ... and has minimally sane links */ - assert(p->fd->bk == p); - assert(p->bk->fd == p); - } + if ((unsigned long) (sz) >= MINSIZE) + { + assert ((sz & MALLOC_ALIGN_MASK) == 0); + assert (aligned_OK (chunk2mem (p))); + /* ... matching footer field */ + assert (next->prev_size == sz); + /* ... and is fully consolidated */ + assert (prev_inuse (p)); + assert (next == av->top || inuse (next)); + + /* ... and has minimally sane links */ + assert (p->fd->bk == p); + assert (p->bk->fd == p); + } else /* markers are always of size SIZE_SZ */ - assert(sz == SIZE_SZ); + assert (sz == SIZE_SZ); } /* - Properties of inuse chunks -*/ + Properties of inuse chunks + */ -static void do_check_inuse_chunk(mstate av, mchunkptr p) +static void +do_check_inuse_chunk (mstate av, mchunkptr p) { mchunkptr next; - do_check_chunk(av, p); + do_check_chunk (av, p); - if (chunk_is_mmapped(p)) + if (chunk_is_mmapped (p)) return; /* mmapped chunks have no next/prev */ /* Check whether it claims to be in use ... */ - assert(inuse(p)); + assert (inuse (p)); - next = next_chunk(p); + next = next_chunk (p); /* ... and is surrounded by OK chunks. - Since more things can be checked with free chunks than inuse ones, - if an inuse chunk borders them and debug is on, it's worth doing them. - */ - if (!prev_inuse(p)) { - /* Note that we cannot even look at prev unless it is not inuse */ - mchunkptr prv = prev_chunk(p); - assert(next_chunk(prv) == p); - do_check_free_chunk(av, prv); - } + Since more things can be checked with free chunks than inuse ones, + if an inuse chunk borders them and debug is on, it's worth doing them. + */ + if (!prev_inuse (p)) + { + /* Note that we cannot even look at prev unless it is not inuse */ + mchunkptr prv = prev_chunk (p); + assert (next_chunk (prv) == p); + do_check_free_chunk (av, prv); + } - if (next == av->top) { - assert(prev_inuse(next)); - assert(chunksize(next) >= MINSIZE); - } - else if (!inuse(next)) - do_check_free_chunk(av, next); + if (next == av->top) + { + assert (prev_inuse (next)); + assert (chunksize (next) >= MINSIZE); + } + else if (!inuse (next)) + do_check_free_chunk (av, next); } /* - Properties of chunks recycled from fastbins -*/ + Properties of chunks recycled from fastbins + */ -static void do_check_remalloced_chunk(mstate av, mchunkptr p, INTERNAL_SIZE_T s) +static void +do_check_remalloced_chunk (mstate av, mchunkptr p, INTERNAL_SIZE_T s) { - INTERNAL_SIZE_T sz = p->size & ~(PREV_INUSE|NON_MAIN_ARENA); + INTERNAL_SIZE_T sz = p->size & ~(PREV_INUSE | NON_MAIN_ARENA); - if (!chunk_is_mmapped(p)) { - assert(av == arena_for_chunk(p)); - if (chunk_non_main_arena(p)) - assert(av != &main_arena); - else - assert(av == &main_arena); - } + if (!chunk_is_mmapped (p)) + { + assert (av == arena_for_chunk (p)); + if (chunk_non_main_arena (p)) + assert (av != &main_arena); + else + assert (av == &main_arena); + } - do_check_inuse_chunk(av, p); + do_check_inuse_chunk (av, p); /* Legal size ... */ - assert((sz & MALLOC_ALIGN_MASK) == 0); - assert((unsigned long)(sz) >= MINSIZE); + assert ((sz & MALLOC_ALIGN_MASK) == 0); + assert ((unsigned long) (sz) >= MINSIZE); /* ... and alignment */ - assert(aligned_OK(chunk2mem(p))); + assert (aligned_OK (chunk2mem (p))); /* chunk is less than MINSIZE more than request */ - assert((long)(sz) - (long)(s) >= 0); - assert((long)(sz) - (long)(s + MINSIZE) < 0); + assert ((long) (sz) - (long) (s) >= 0); + assert ((long) (sz) - (long) (s + MINSIZE) < 0); } /* - Properties of nonrecycled chunks at the point they are malloced -*/ + Properties of nonrecycled chunks at the point they are malloced + */ -static void do_check_malloced_chunk(mstate av, mchunkptr p, INTERNAL_SIZE_T s) +static void +do_check_malloced_chunk (mstate av, mchunkptr p, INTERNAL_SIZE_T s) { /* same as recycled case ... */ - do_check_remalloced_chunk(av, p, s); + do_check_remalloced_chunk (av, p, s); /* - ... plus, must obey implementation invariant that prev_inuse is - always true of any allocated chunk; i.e., that each allocated - chunk borders either a previously allocated and still in-use - chunk, or the base of its memory arena. This is ensured - by making all allocations from the `lowest' part of any found - chunk. This does not necessarily hold however for chunks - recycled via fastbins. - */ - - assert(prev_inuse(p)); + ... plus, must obey implementation invariant that prev_inuse is + always true of any allocated chunk; i.e., that each allocated + chunk borders either a previously allocated and still in-use + chunk, or the base of its memory arena. This is ensured + by making all allocations from the `lowest' part of any found + chunk. This does not necessarily hold however for chunks + recycled via fastbins. + */ + + assert (prev_inuse (p)); } /* - Properties of malloc_state. + Properties of malloc_state. - This may be useful for debugging malloc, as well as detecting user - programmer errors that somehow write into malloc_state. + This may be useful for debugging malloc, as well as detecting user + programmer errors that somehow write into malloc_state. - If you are extending or experimenting with this malloc, you can - probably figure out how to hack this routine to print out or - display chunk addresses, sizes, bins, and other instrumentation. -*/ + If you are extending or experimenting with this malloc, you can + probably figure out how to hack this routine to print out or + display chunk addresses, sizes, bins, and other instrumentation. + */ -static void do_check_malloc_state(mstate av) +static void +do_check_malloc_state (mstate av) { int i; mchunkptr p; @@ -2083,126 +2100,132 @@ static void do_check_malloc_state(mstate av) int max_fast_bin; /* internal size_t must be no wider than pointer type */ - assert(sizeof(INTERNAL_SIZE_T) <= sizeof(char*)); + assert (sizeof (INTERNAL_SIZE_T) <= sizeof (char *)); /* alignment is a power of 2 */ - assert((MALLOC_ALIGNMENT & (MALLOC_ALIGNMENT-1)) == 0); + assert ((MALLOC_ALIGNMENT & (MALLOC_ALIGNMENT - 1)) == 0); /* cannot run remaining checks until fully initialized */ - if (av->top == 0 || av->top == initial_top(av)) + if (av->top == 0 || av->top == initial_top (av)) return; /* pagesize is a power of 2 */ - assert((GLRO(dl_pagesize) & (GLRO(dl_pagesize)-1)) == 0); + assert ((GLRO (dl_pagesize) & (GLRO (dl_pagesize) - 1)) == 0); /* A contiguous main_arena is consistent with sbrk_base. */ - if (av == &main_arena && contiguous(av)) - assert((char*)mp_.sbrk_base + av->system_mem == - (char*)av->top + chunksize(av->top)); + if (av == &main_arena && contiguous (av)) + assert ((char *) mp_.sbrk_base + av->system_mem == + (char *) av->top + chunksize (av->top)); /* properties of fastbins */ /* max_fast is in allowed range */ - assert((get_max_fast () & ~1) <= request2size(MAX_FAST_SIZE)); - - max_fast_bin = fastbin_index(get_max_fast ()); - - for (i = 0; i < NFASTBINS; ++i) { - p = fastbin (av, i); - - /* The following test can only be performed for the main arena. - While mallopt calls malloc_consolidate to get rid of all fast - bins (especially those larger than the new maximum) this does - only happen for the main arena. Trying to do this for any - other arena would mean those arenas have to be locked and - malloc_consolidate be called for them. This is excessive. And - even if this is acceptable to somebody it still cannot solve - the problem completely since if the arena is locked a - concurrent malloc call might create a new arena which then - could use the newly invalid fast bins. */ - - /* all bins past max_fast are empty */ - if (av == &main_arena && i > max_fast_bin) - assert(p == 0); - - while (p != 0) { - /* each chunk claims to be inuse */ - do_check_inuse_chunk(av, p); - total += chunksize(p); - /* chunk belongs in this bin */ - assert(fastbin_index(chunksize(p)) == i); - p = p->fd; + assert ((get_max_fast () & ~1) <= request2size (MAX_FAST_SIZE)); + + max_fast_bin = fastbin_index (get_max_fast ()); + + for (i = 0; i < NFASTBINS; ++i) + { + p = fastbin (av, i); + + /* The following test can only be performed for the main arena. + While mallopt calls malloc_consolidate to get rid of all fast + bins (especially those larger than the new maximum) this does + only happen for the main arena. Trying to do this for any + other arena would mean those arenas have to be locked and + malloc_consolidate be called for them. This is excessive. And + even if this is acceptable to somebody it still cannot solve + the problem completely since if the arena is locked a + concurrent malloc call might create a new arena which then + could use the newly invalid fast bins. */ + + /* all bins past max_fast are empty */ + if (av == &main_arena && i > max_fast_bin) + assert (p == 0); + + while (p != 0) + { + /* each chunk claims to be inuse */ + do_check_inuse_chunk (av, p); + total += chunksize (p); + /* chunk belongs in this bin */ + assert (fastbin_index (chunksize (p)) == i); + p = p->fd; + } } - } if (total != 0) - assert(have_fastchunks(av)); - else if (!have_fastchunks(av)) - assert(total == 0); + assert (have_fastchunks (av)); + else if (!have_fastchunks (av)) + assert (total == 0); /* check normal bins */ - for (i = 1; i < NBINS; ++i) { - b = bin_at(av,i); - - /* binmap is accurate (except for bin 1 == unsorted_chunks) */ - if (i >= 2) { - unsigned int binbit = get_binmap(av,i); - int empty = last(b) == b; - if (!binbit) - assert(empty); - else if (!empty) - assert(binbit); - } - - for (p = last(b); p != b; p = p->bk) { - /* each chunk claims to be free */ - do_check_free_chunk(av, p); - size = chunksize(p); - total += size; - if (i >= 2) { - /* chunk belongs in bin */ - idx = bin_index(size); - assert(idx == i); - /* lists are sorted */ - assert(p->bk == b || - (unsigned long)chunksize(p->bk) >= (unsigned long)chunksize(p)); - - if (!in_smallbin_range(size)) - { - if (p->fd_nextsize != NULL) - { - if (p->fd_nextsize == p) - assert (p->bk_nextsize == p); - else - { - if (p->fd_nextsize == first (b)) - assert (chunksize (p) < chunksize (p->fd_nextsize)); - else - assert (chunksize (p) > chunksize (p->fd_nextsize)); - - if (p == first (b)) - assert (chunksize (p) > chunksize (p->bk_nextsize)); - else - assert (chunksize (p) < chunksize (p->bk_nextsize)); - } - } - else - assert (p->bk_nextsize == NULL); - } - } else if (!in_smallbin_range(size)) - assert (p->fd_nextsize == NULL && p->bk_nextsize == NULL); - /* chunk is followed by a legal chain of inuse chunks */ - for (q = next_chunk(p); - (q != av->top && inuse(q) && - (unsigned long)(chunksize(q)) >= MINSIZE); - q = next_chunk(q)) - do_check_inuse_chunk(av, q); + for (i = 1; i < NBINS; ++i) + { + b = bin_at (av, i); + + /* binmap is accurate (except for bin 1 == unsorted_chunks) */ + if (i >= 2) + { + unsigned int binbit = get_binmap (av, i); + int empty = last (b) == b; + if (!binbit) + assert (empty); + else if (!empty) + assert (binbit); + } + + for (p = last (b); p != b; p = p->bk) + { + /* each chunk claims to be free */ + do_check_free_chunk (av, p); + size = chunksize (p); + total += size; + if (i >= 2) + { + /* chunk belongs in bin */ + idx = bin_index (size); + assert (idx == i); + /* lists are sorted */ + assert (p->bk == b || + (unsigned long) chunksize (p->bk) >= (unsigned long) chunksize (p)); + + if (!in_smallbin_range (size)) + { + if (p->fd_nextsize != NULL) + { + if (p->fd_nextsize == p) + assert (p->bk_nextsize == p); + else + { + if (p->fd_nextsize == first (b)) + assert (chunksize (p) < chunksize (p->fd_nextsize)); + else + assert (chunksize (p) > chunksize (p->fd_nextsize)); + + if (p == first (b)) + assert (chunksize (p) > chunksize (p->bk_nextsize)); + else + assert (chunksize (p) < chunksize (p->bk_nextsize)); + } + } + else + assert (p->bk_nextsize == NULL); + } + } + else if (!in_smallbin_range (size)) + assert (p->fd_nextsize == NULL && p->bk_nextsize == NULL); + /* chunk is followed by a legal chain of inuse chunks */ + for (q = next_chunk (p); + (q != av->top && inuse (q) && + (unsigned long) (chunksize (q)) >= MINSIZE); + q = next_chunk (q)) + do_check_inuse_chunk (av, q); + } } - } /* top chunk is OK */ - check_chunk(av, av->top); - + check_chunk (av, av->top); } #endif @@ -2214,461 +2237,482 @@ static void do_check_malloc_state(mstate av) /* ----------- Routines dealing with system allocation -------------- */ /* - sysmalloc handles malloc cases requiring more memory from the system. - On entry, it is assumed that av->top does not have enough - space to service request for nb bytes, thus requiring that av->top - be extended or replaced. -*/ + sysmalloc handles malloc cases requiring more memory from the system. + On entry, it is assumed that av->top does not have enough + space to service request for nb bytes, thus requiring that av->top + be extended or replaced. + */ -static void* sysmalloc(INTERNAL_SIZE_T nb, mstate av) +static void * +sysmalloc (INTERNAL_SIZE_T nb, mstate av) { - mchunkptr old_top; /* incoming value of av->top */ + mchunkptr old_top; /* incoming value of av->top */ INTERNAL_SIZE_T old_size; /* its size */ - char* old_end; /* its end address */ + char *old_end; /* its end address */ - long size; /* arg to first MORECORE or mmap call */ - char* brk; /* return value from MORECORE */ + long size; /* arg to first MORECORE or mmap call */ + char *brk; /* return value from MORECORE */ - long correction; /* arg to 2nd MORECORE call */ - char* snd_brk; /* 2nd return val */ + long correction; /* arg to 2nd MORECORE call */ + char *snd_brk; /* 2nd return val */ INTERNAL_SIZE_T front_misalign; /* unusable bytes at front of new space */ INTERNAL_SIZE_T end_misalign; /* partial page left at end of new space */ - char* aligned_brk; /* aligned offset into brk */ + char *aligned_brk; /* aligned offset into brk */ - mchunkptr p; /* the allocated/returned chunk */ - mchunkptr remainder; /* remainder from allocation */ - unsigned long remainder_size; /* its size */ + mchunkptr p; /* the allocated/returned chunk */ + mchunkptr remainder; /* remainder from allocation */ + unsigned long remainder_size; /* its size */ - size_t pagemask = GLRO(dl_pagesize) - 1; - bool tried_mmap = false; + size_t pagemask = GLRO (dl_pagesize) - 1; + bool tried_mmap = false; /* - If have mmap, and the request size meets the mmap threshold, and - the system supports mmap, and there are few enough currently - allocated mmapped regions, try to directly map this request - rather than expanding top. - */ - - if ((unsigned long)(nb) >= (unsigned long)(mp_.mmap_threshold) && - (mp_.n_mmaps < mp_.n_mmaps_max)) { - - char* mm; /* return value from mmap call*/ - - try_mmap: - /* - Round up size to nearest page. For mmapped chunks, the overhead - is one SIZE_SZ unit larger than for normal chunks, because there - is no following chunk whose prev_size field could be used. - - See the front_misalign handling below, for glibc there is no - need for further alignments unless we have have high alignment. - */ - if (MALLOC_ALIGNMENT == 2 * SIZE_SZ) - size = (nb + SIZE_SZ + pagemask) & ~pagemask; - else - size = (nb + SIZE_SZ + MALLOC_ALIGN_MASK + pagemask) & ~pagemask; - tried_mmap = true; - - /* Don't try if size wraps around 0 */ - if ((unsigned long)(size) > (unsigned long)(nb)) { - - mm = (char*)(MMAP(0, size, PROT_READ|PROT_WRITE, 0)); - - if (mm != MAP_FAILED) { - - /* - The offset to the start of the mmapped region is stored - in the prev_size field of the chunk. This allows us to adjust - returned start address to meet alignment requirements here - and in memalign(), and still be able to compute proper - address argument for later munmap in free() and realloc(). - */ - - if (MALLOC_ALIGNMENT == 2 * SIZE_SZ) - { - /* For glibc, chunk2mem increases the address by 2*SIZE_SZ and - MALLOC_ALIGN_MASK is 2*SIZE_SZ-1. Each mmap'ed area is page - aligned and therefore definitely MALLOC_ALIGN_MASK-aligned. */ - assert (((INTERNAL_SIZE_T)chunk2mem(mm) & MALLOC_ALIGN_MASK) == 0); - front_misalign = 0; - } - else - front_misalign = (INTERNAL_SIZE_T)chunk2mem(mm) & MALLOC_ALIGN_MASK; - if (front_misalign > 0) { - correction = MALLOC_ALIGNMENT - front_misalign; - p = (mchunkptr)(mm + correction); - p->prev_size = correction; - set_head(p, (size - correction) |IS_MMAPPED); - } - else - { - p = (mchunkptr)mm; - set_head(p, size|IS_MMAPPED); - } - - /* update statistics */ - - int new = atomic_exchange_and_add (&mp_.n_mmaps, 1) + 1; - atomic_max (&mp_.max_n_mmaps, new); - - unsigned long sum; - sum = atomic_exchange_and_add(&mp_.mmapped_mem, size) + size; - atomic_max (&mp_.max_mmapped_mem, sum); - - check_chunk(av, p); + If have mmap, and the request size meets the mmap threshold, and + the system supports mmap, and there are few enough currently + allocated mmapped regions, try to directly map this request + rather than expanding top. + */ + + if ((unsigned long) (nb) >= (unsigned long) (mp_.mmap_threshold) && + (mp_.n_mmaps < mp_.n_mmaps_max)) + { + char *mm; /* return value from mmap call*/ - return chunk2mem(p); - } + try_mmap: + /* + Round up size to nearest page. For mmapped chunks, the overhead + is one SIZE_SZ unit larger than for normal chunks, because there + is no following chunk whose prev_size field could be used. + + See the front_misalign handling below, for glibc there is no + need for further alignments unless we have have high alignment. + */ + if (MALLOC_ALIGNMENT == 2 * SIZE_SZ) + size = (nb + SIZE_SZ + pagemask) & ~pagemask; + else + size = (nb + SIZE_SZ + MALLOC_ALIGN_MASK + pagemask) & ~pagemask; + tried_mmap = true; + + /* Don't try if size wraps around 0 */ + if ((unsigned long) (size) > (unsigned long) (nb)) + { + mm = (char *) (MMAP (0, size, PROT_READ | PROT_WRITE, 0)); + + if (mm != MAP_FAILED) + { + /* + The offset to the start of the mmapped region is stored + in the prev_size field of the chunk. This allows us to adjust + returned start address to meet alignment requirements here + and in memalign(), and still be able to compute proper + address argument for later munmap in free() and realloc(). + */ + + if (MALLOC_ALIGNMENT == 2 * SIZE_SZ) + { + /* For glibc, chunk2mem increases the address by 2*SIZE_SZ and + MALLOC_ALIGN_MASK is 2*SIZE_SZ-1. Each mmap'ed area is page + aligned and therefore definitely MALLOC_ALIGN_MASK-aligned. */ + assert (((INTERNAL_SIZE_T) chunk2mem (mm) & MALLOC_ALIGN_MASK) == 0); + front_misalign = 0; + } + else + front_misalign = (INTERNAL_SIZE_T) chunk2mem (mm) & MALLOC_ALIGN_MASK; + if (front_misalign > 0) + { + correction = MALLOC_ALIGNMENT - front_misalign; + p = (mchunkptr) (mm + correction); + p->prev_size = correction; + set_head (p, (size - correction) | IS_MMAPPED); + } + else + { + p = (mchunkptr) mm; + set_head (p, size | IS_MMAPPED); + } + + /* update statistics */ + + int new = atomic_exchange_and_add (&mp_.n_mmaps, 1) + 1; + atomic_max (&mp_.max_n_mmaps, new); + + unsigned long sum; + sum = atomic_exchange_and_add (&mp_.mmapped_mem, size) + size; + atomic_max (&mp_.max_mmapped_mem, sum); + + check_chunk (av, p); + + return chunk2mem (p); + } + } } - } /* Record incoming configuration of top */ - old_top = av->top; - old_size = chunksize(old_top); - old_end = (char*)(chunk_at_offset(old_top, old_size)); + old_top = av->top; + old_size = chunksize (old_top); + old_end = (char *) (chunk_at_offset (old_top, old_size)); - brk = snd_brk = (char*)(MORECORE_FAILURE); + brk = snd_brk = (char *) (MORECORE_FAILURE); /* If not the first time through, we require old_size to be at least MINSIZE and to have prev_inuse set. - */ + */ - assert((old_top == initial_top(av) && old_size == 0) || - ((unsigned long) (old_size) >= MINSIZE && - prev_inuse(old_top) && - ((unsigned long)old_end & pagemask) == 0)); + assert ((old_top == initial_top (av) && old_size == 0) || + ((unsigned long) (old_size) >= MINSIZE && + prev_inuse (old_top) && + ((unsigned long) old_end & pagemask) == 0)); /* Precondition: not enough current space to satisfy nb request */ - assert((unsigned long)(old_size) < (unsigned long)(nb + MINSIZE)); - - - if (av != &main_arena) { - - heap_info *old_heap, *heap; - size_t old_heap_size; - - /* First try to extend the current heap. */ - old_heap = heap_for_ptr(old_top); - old_heap_size = old_heap->size; - if ((long) (MINSIZE + nb - old_size) > 0 - && grow_heap(old_heap, MINSIZE + nb - old_size) == 0) { - av->system_mem += old_heap->size - old_heap_size; - arena_mem += old_heap->size - old_heap_size; - set_head(old_top, (((char *)old_heap + old_heap->size) - (char *)old_top) - | PREV_INUSE); - } - else if ((heap = new_heap(nb + (MINSIZE + sizeof(*heap)), mp_.top_pad))) { - /* Use a newly allocated heap. */ - heap->ar_ptr = av; - heap->prev = old_heap; - av->system_mem += heap->size; - arena_mem += heap->size; - /* Set up the new top. */ - top(av) = chunk_at_offset(heap, sizeof(*heap)); - set_head(top(av), (heap->size - sizeof(*heap)) | PREV_INUSE); - - /* Setup fencepost and free the old top chunk with a multiple of - MALLOC_ALIGNMENT in size. */ - /* The fencepost takes at least MINSIZE bytes, because it might - become the top chunk again later. Note that a footer is set - up, too, although the chunk is marked in use. */ - old_size = (old_size - MINSIZE) & ~MALLOC_ALIGN_MASK; - set_head(chunk_at_offset(old_top, old_size + 2*SIZE_SZ), 0|PREV_INUSE); - if (old_size >= MINSIZE) { - set_head(chunk_at_offset(old_top, old_size), (2*SIZE_SZ)|PREV_INUSE); - set_foot(chunk_at_offset(old_top, old_size), (2*SIZE_SZ)); - set_head(old_top, old_size|PREV_INUSE|NON_MAIN_ARENA); - _int_free(av, old_top, 1); - } else { - set_head(old_top, (old_size + 2*SIZE_SZ)|PREV_INUSE); - set_foot(old_top, (old_size + 2*SIZE_SZ)); - } - } - else if (!tried_mmap) - /* We can at least try to use to mmap memory. */ - goto try_mmap; - - } else { /* av == main_arena */ - - - /* Request enough space for nb + pad + overhead */ - - size = nb + mp_.top_pad + MINSIZE; - - /* - If contiguous, we can subtract out existing space that we hope to - combine with new space. We add it back later only if - we don't actually get contiguous space. - */ - - if (contiguous(av)) - size -= old_size; - - /* - Round to a multiple of page size. - If MORECORE is not contiguous, this ensures that we only call it - with whole-page arguments. And if MORECORE is contiguous and - this is not first time through, this preserves page-alignment of - previous calls. Otherwise, we correct to page-align below. - */ - - size = (size + pagemask) & ~pagemask; - - /* - Don't try to call MORECORE if argument is so big as to appear - negative. Note that since mmap takes size_t arg, it may succeed - below even if we cannot call MORECORE. - */ - - if (size > 0) { - brk = (char*)(MORECORE(size)); - LIBC_PROBE (memory_sbrk_more, 2, brk, size); - } - - if (brk != (char*)(MORECORE_FAILURE)) { - /* Call the `morecore' hook if necessary. */ - void (*hook) (void) = atomic_forced_read (__after_morecore_hook); - if (__builtin_expect (hook != NULL, 0)) - (*hook) (); - } else { - /* - If have mmap, try using it as a backup when MORECORE fails or - cannot be used. This is worth doing on systems that have "holes" in - address space, so sbrk cannot extend to give contiguous space, but - space is available elsewhere. Note that we ignore mmap max count - and threshold limits, since the space will not be used as a - segregated mmap region. - */ - - /* Cannot merge with old top, so add its size back in */ - if (contiguous(av)) - size = (size + old_size + pagemask) & ~pagemask; - - /* If we are relying on mmap as backup, then use larger units */ - if ((unsigned long)(size) < (unsigned long)(MMAP_AS_MORECORE_SIZE)) - size = MMAP_AS_MORECORE_SIZE; - - /* Don't try if size wraps around 0 */ - if ((unsigned long)(size) > (unsigned long)(nb)) { + assert ((unsigned long) (old_size) < (unsigned long) (nb + MINSIZE)); - char *mbrk = (char*)(MMAP(0, size, PROT_READ|PROT_WRITE, 0)); - if (mbrk != MAP_FAILED) { - - /* We do not need, and cannot use, another sbrk call to find end */ - brk = mbrk; - snd_brk = brk + size; - - /* - Record that we no longer have a contiguous sbrk region. - After the first time mmap is used as backup, we do not - ever rely on contiguous space since this could incorrectly - bridge regions. - */ - set_noncontiguous(av); - } - } - } - - if (brk != (char*)(MORECORE_FAILURE)) { - if (mp_.sbrk_base == 0) - mp_.sbrk_base = brk; - av->system_mem += size; - - /* - If MORECORE extends previous space, we can likewise extend top size. - */ - - if (brk == old_end && snd_brk == (char*)(MORECORE_FAILURE)) - set_head(old_top, (size + old_size) | PREV_INUSE); - - else if (contiguous(av) && old_size && brk < old_end) { - /* Oops! Someone else killed our space.. Can't touch anything. */ - malloc_printerr (3, "break adjusted to free malloc space", brk); + if (av != &main_arena) + { + heap_info *old_heap, *heap; + size_t old_heap_size; + + /* First try to extend the current heap. */ + old_heap = heap_for_ptr (old_top); + old_heap_size = old_heap->size; + if ((long) (MINSIZE + nb - old_size) > 0 + && grow_heap (old_heap, MINSIZE + nb - old_size) == 0) + { + av->system_mem += old_heap->size - old_heap_size; + arena_mem += old_heap->size - old_heap_size; + set_head (old_top, (((char *) old_heap + old_heap->size) - (char *) old_top) + | PREV_INUSE); + } + else if ((heap = new_heap (nb + (MINSIZE + sizeof (*heap)), mp_.top_pad))) + { + /* Use a newly allocated heap. */ + heap->ar_ptr = av; + heap->prev = old_heap; + av->system_mem += heap->size; + arena_mem += heap->size; + /* Set up the new top. */ + top (av) = chunk_at_offset (heap, sizeof (*heap)); + set_head (top (av), (heap->size - sizeof (*heap)) | PREV_INUSE); + + /* Setup fencepost and free the old top chunk with a multiple of + MALLOC_ALIGNMENT in size. */ + /* The fencepost takes at least MINSIZE bytes, because it might + become the top chunk again later. Note that a footer is set + up, too, although the chunk is marked in use. */ + old_size = (old_size - MINSIZE) & ~MALLOC_ALIGN_MASK; + set_head (chunk_at_offset (old_top, old_size + 2 * SIZE_SZ), 0 | PREV_INUSE); + if (old_size >= MINSIZE) + { + set_head (chunk_at_offset (old_top, old_size), (2 * SIZE_SZ) | PREV_INUSE); + set_foot (chunk_at_offset (old_top, old_size), (2 * SIZE_SZ)); + set_head (old_top, old_size | PREV_INUSE | NON_MAIN_ARENA); + _int_free (av, old_top, 1); + } + else + { + set_head (old_top, (old_size + 2 * SIZE_SZ) | PREV_INUSE); + set_foot (old_top, (old_size + 2 * SIZE_SZ)); + } + } + else if (!tried_mmap) + /* We can at least try to use to mmap memory. */ + goto try_mmap; } + else /* av == main_arena */ - /* - Otherwise, make adjustments: - - * If the first time through or noncontiguous, we need to call sbrk - just to find out where the end of memory lies. - - * We need to ensure that all returned chunks from malloc will meet - MALLOC_ALIGNMENT - - * If there was an intervening foreign sbrk, we need to adjust sbrk - request size to account for fact that we will not be able to - combine new space with existing space in old_top. - - * Almost all systems internally allocate whole pages at a time, in - which case we might as well use the whole last page of request. - So we allocate enough more memory to hit a page boundary now, - which in turn causes future contiguous calls to page-align. - */ - - else { - front_misalign = 0; - end_misalign = 0; - correction = 0; - aligned_brk = brk; - /* handle contiguous cases */ - if (contiguous(av)) { + { /* Request enough space for nb + pad + overhead */ + size = nb + mp_.top_pad + MINSIZE; - /* Count foreign sbrk as system_mem. */ - if (old_size) - av->system_mem += brk - old_end; - - /* Guarantee alignment of first new chunk made from this space */ - - front_misalign = (INTERNAL_SIZE_T)chunk2mem(brk) & MALLOC_ALIGN_MASK; - if (front_misalign > 0) { - - /* - Skip over some bytes to arrive at an aligned position. - We don't need to specially mark these wasted front bytes. - They will never be accessed anyway because - prev_inuse of av->top (and any chunk created from its start) - is always true after initialization. - */ - - correction = MALLOC_ALIGNMENT - front_misalign; - aligned_brk += correction; - } - - /* - If this isn't adjacent to existing space, then we will not - be able to merge with old_top space, so must add to 2nd request. - */ - - correction += old_size; - - /* Extend the end address to hit a page boundary */ - end_misalign = (INTERNAL_SIZE_T)(brk + size + correction); - correction += ((end_misalign + pagemask) & ~pagemask) - end_misalign; - - assert(correction >= 0); - snd_brk = (char*)(MORECORE(correction)); - - /* - If can't allocate correction, try to at least find out current - brk. It might be enough to proceed without failing. - - Note that if second sbrk did NOT fail, we assume that space - is contiguous with first sbrk. This is a safe assumption unless - program is multithreaded but doesn't use locks and a foreign sbrk - occurred between our first and second calls. - */ - - if (snd_brk == (char*)(MORECORE_FAILURE)) { - correction = 0; - snd_brk = (char*)(MORECORE(0)); - } else { - /* Call the `morecore' hook if necessary. */ - void (*hook) (void) = atomic_forced_read (__after_morecore_hook); - if (__builtin_expect (hook != NULL, 0)) - (*hook) (); - } - } - - /* handle non-contiguous cases */ - else { - if (MALLOC_ALIGNMENT == 2 * SIZE_SZ) - /* MORECORE/mmap must correctly align */ - assert(((unsigned long)chunk2mem(brk) & MALLOC_ALIGN_MASK) == 0); - else { - front_misalign = (INTERNAL_SIZE_T)chunk2mem(brk) & MALLOC_ALIGN_MASK; - if (front_misalign > 0) { - - /* - Skip over some bytes to arrive at an aligned position. - We don't need to specially mark these wasted front bytes. - They will never be accessed anyway because - prev_inuse of av->top (and any chunk created from its start) - is always true after initialization. - */ - - aligned_brk += MALLOC_ALIGNMENT - front_misalign; - } - } - - /* Find out current end of memory */ - if (snd_brk == (char*)(MORECORE_FAILURE)) { - snd_brk = (char*)(MORECORE(0)); - } - } + /* + If contiguous, we can subtract out existing space that we hope to + combine with new space. We add it back later only if + we don't actually get contiguous space. + */ - /* Adjust top based on results of second sbrk */ - if (snd_brk != (char*)(MORECORE_FAILURE)) { - av->top = (mchunkptr)aligned_brk; - set_head(av->top, (snd_brk - aligned_brk + correction) | PREV_INUSE); - av->system_mem += correction; - - /* - If not the first time through, we either have a - gap due to foreign sbrk or a non-contiguous region. Insert a - double fencepost at old_top to prevent consolidation with space - we don't own. These fenceposts are artificial chunks that are - marked as inuse and are in any case too small to use. We need - two to make sizes and alignments work out. - */ - - if (old_size != 0) { - /* - Shrink old_top to insert fenceposts, keeping size a - multiple of MALLOC_ALIGNMENT. We know there is at least - enough space in old_top to do this. - */ - old_size = (old_size - 4*SIZE_SZ) & ~MALLOC_ALIGN_MASK; - set_head(old_top, old_size | PREV_INUSE); - - /* - Note that the following assignments completely overwrite - old_top when old_size was previously MINSIZE. This is - intentional. We need the fencepost, even if old_top otherwise gets - lost. - */ - chunk_at_offset(old_top, old_size )->size = - (2*SIZE_SZ)|PREV_INUSE; - - chunk_at_offset(old_top, old_size + 2*SIZE_SZ)->size = - (2*SIZE_SZ)|PREV_INUSE; - - /* If possible, release the rest. */ - if (old_size >= MINSIZE) { - _int_free(av, old_top, 1); - } + if (contiguous (av)) + size -= old_size; - } - } - } - } + /* + Round to a multiple of page size. + If MORECORE is not contiguous, this ensures that we only call it + with whole-page arguments. And if MORECORE is contiguous and + this is not first time through, this preserves page-alignment of + previous calls. Otherwise, we correct to page-align below. + */ - } /* if (av != &main_arena) */ + size = (size + pagemask) & ~pagemask; - if ((unsigned long)av->system_mem > (unsigned long)(av->max_system_mem)) + /* + Don't try to call MORECORE if argument is so big as to appear + negative. Note that since mmap takes size_t arg, it may succeed + below even if we cannot call MORECORE. + */ + + if (size > 0) + { + brk = (char *) (MORECORE (size)); + LIBC_PROBE (memory_sbrk_more, 2, brk, size); + } + + if (brk != (char *) (MORECORE_FAILURE)) + { + /* Call the `morecore' hook if necessary. */ + void (*hook) (void) = atomic_forced_read (__after_morecore_hook); + if (__builtin_expect (hook != NULL, 0)) + (*hook)(); + } + else + { + /* + If have mmap, try using it as a backup when MORECORE fails or + cannot be used. This is worth doing on systems that have "holes" in + address space, so sbrk cannot extend to give contiguous space, but + space is available elsewhere. Note that we ignore mmap max count + and threshold limits, since the space will not be used as a + segregated mmap region. + */ + + /* Cannot merge with old top, so add its size back in */ + if (contiguous (av)) + size = (size + old_size + pagemask) & ~pagemask; + + /* If we are relying on mmap as backup, then use larger units */ + if ((unsigned long) (size) < (unsigned long) (MMAP_AS_MORECORE_SIZE)) + size = MMAP_AS_MORECORE_SIZE; + + /* Don't try if size wraps around 0 */ + if ((unsigned long) (size) > (unsigned long) (nb)) + { + char *mbrk = (char *) (MMAP (0, size, PROT_READ | PROT_WRITE, 0)); + + if (mbrk != MAP_FAILED) + { + /* We do not need, and cannot use, another sbrk call to find end */ + brk = mbrk; + snd_brk = brk + size; + + /* + Record that we no longer have a contiguous sbrk region. + After the first time mmap is used as backup, we do not + ever rely on contiguous space since this could incorrectly + bridge regions. + */ + set_noncontiguous (av); + } + } + } + + if (brk != (char *) (MORECORE_FAILURE)) + { + if (mp_.sbrk_base == 0) + mp_.sbrk_base = brk; + av->system_mem += size; + + /* + If MORECORE extends previous space, we can likewise extend top size. + */ + + if (brk == old_end && snd_brk == (char *) (MORECORE_FAILURE)) + set_head (old_top, (size + old_size) | PREV_INUSE); + + else if (contiguous (av) && old_size && brk < old_end) + { + /* Oops! Someone else killed our space.. Can't touch anything. */ + malloc_printerr (3, "break adjusted to free malloc space", brk); + } + + /* + Otherwise, make adjustments: + + * If the first time through or noncontiguous, we need to call sbrk + just to find out where the end of memory lies. + + * We need to ensure that all returned chunks from malloc will meet + MALLOC_ALIGNMENT + + * If there was an intervening foreign sbrk, we need to adjust sbrk + request size to account for fact that we will not be able to + combine new space with existing space in old_top. + + * Almost all systems internally allocate whole pages at a time, in + which case we might as well use the whole last page of request. + So we allocate enough more memory to hit a page boundary now, + which in turn causes future contiguous calls to page-align. + */ + + else + { + front_misalign = 0; + end_misalign = 0; + correction = 0; + aligned_brk = brk; + + /* handle contiguous cases */ + if (contiguous (av)) + { + /* Count foreign sbrk as system_mem. */ + if (old_size) + av->system_mem += brk - old_end; + + /* Guarantee alignment of first new chunk made from this space */ + + front_misalign = (INTERNAL_SIZE_T) chunk2mem (brk) & MALLOC_ALIGN_MASK; + if (front_misalign > 0) + { + /* + Skip over some bytes to arrive at an aligned position. + We don't need to specially mark these wasted front bytes. + They will never be accessed anyway because + prev_inuse of av->top (and any chunk created from its start) + is always true after initialization. + */ + + correction = MALLOC_ALIGNMENT - front_misalign; + aligned_brk += correction; + } + + /* + If this isn't adjacent to existing space, then we will not + be able to merge with old_top space, so must add to 2nd request. + */ + + correction += old_size; + + /* Extend the end address to hit a page boundary */ + end_misalign = (INTERNAL_SIZE_T) (brk + size + correction); + correction += ((end_misalign + pagemask) & ~pagemask) - end_misalign; + + assert (correction >= 0); + snd_brk = (char *) (MORECORE (correction)); + + /* + If can't allocate correction, try to at least find out current + brk. It might be enough to proceed without failing. + + Note that if second sbrk did NOT fail, we assume that space + is contiguous with first sbrk. This is a safe assumption unless + program is multithreaded but doesn't use locks and a foreign sbrk + occurred between our first and second calls. + */ + + if (snd_brk == (char *) (MORECORE_FAILURE)) + { + correction = 0; + snd_brk = (char *) (MORECORE (0)); + } + else + { + /* Call the `morecore' hook if necessary. */ + void (*hook) (void) = atomic_forced_read (__after_morecore_hook); + if (__builtin_expect (hook != NULL, 0)) + (*hook)(); + } + } + + /* handle non-contiguous cases */ + else + { + if (MALLOC_ALIGNMENT == 2 * SIZE_SZ) + /* MORECORE/mmap must correctly align */ + assert (((unsigned long) chunk2mem (brk) & MALLOC_ALIGN_MASK) == 0); + else + { + front_misalign = (INTERNAL_SIZE_T) chunk2mem (brk) & MALLOC_ALIGN_MASK; + if (front_misalign > 0) + { + /* + Skip over some bytes to arrive at an aligned position. + We don't need to specially mark these wasted front bytes. + They will never be accessed anyway because + prev_inuse of av->top (and any chunk created from its start) + is always true after initialization. + */ + + aligned_brk += MALLOC_ALIGNMENT - front_misalign; + } + } + + /* Find out current end of memory */ + if (snd_brk == (char *) (MORECORE_FAILURE)) + { + snd_brk = (char *) (MORECORE (0)); + } + } + + /* Adjust top based on results of second sbrk */ + if (snd_brk != (char *) (MORECORE_FAILURE)) + { + av->top = (mchunkptr) aligned_brk; + set_head (av->top, (snd_brk - aligned_brk + correction) | PREV_INUSE); + av->system_mem += correction; + + /* + If not the first time through, we either have a + gap due to foreign sbrk or a non-contiguous region. Insert a + double fencepost at old_top to prevent consolidation with space + we don't own. These fenceposts are artificial chunks that are + marked as inuse and are in any case too small to use. We need + two to make sizes and alignments work out. + */ + + if (old_size != 0) + { + /* + Shrink old_top to insert fenceposts, keeping size a + multiple of MALLOC_ALIGNMENT. We know there is at least + enough space in old_top to do this. + */ + old_size = (old_size - 4 * SIZE_SZ) & ~MALLOC_ALIGN_MASK; + set_head (old_top, old_size | PREV_INUSE); + + /* + Note that the following assignments completely overwrite + old_top when old_size was previously MINSIZE. This is + intentional. We need the fencepost, even if old_top otherwise gets + lost. + */ + chunk_at_offset (old_top, old_size)->size = + (2 * SIZE_SZ) | PREV_INUSE; + + chunk_at_offset (old_top, old_size + 2 * SIZE_SZ)->size = + (2 * SIZE_SZ) | PREV_INUSE; + + /* If possible, release the rest. */ + if (old_size >= MINSIZE) + { + _int_free (av, old_top, 1); + } + } + } + } + } + } /* if (av != &main_arena) */ + + if ((unsigned long) av->system_mem > (unsigned long) (av->max_system_mem)) av->max_system_mem = av->system_mem; - check_malloc_state(av); + check_malloc_state (av); /* finally, do the allocation */ p = av->top; - size = chunksize(p); + size = chunksize (p); /* check that one of the above allocation paths succeeded */ - if ((unsigned long)(size) >= (unsigned long)(nb + MINSIZE)) { - remainder_size = size - nb; - remainder = chunk_at_offset(p, nb); - av->top = remainder; - set_head(p, nb | PREV_INUSE | (av != &main_arena ? NON_MAIN_ARENA : 0)); - set_head(remainder, remainder_size | PREV_INUSE); - check_malloced_chunk(av, p, nb); - return chunk2mem(p); - } + if ((unsigned long) (size) >= (unsigned long) (nb + MINSIZE)) + { + remainder_size = size - nb; + remainder = chunk_at_offset (p, nb); + av->top = remainder; + set_head (p, nb | PREV_INUSE | (av != &main_arena ? NON_MAIN_ARENA : 0)); + set_head (remainder, remainder_size | PREV_INUSE); + check_malloced_chunk (av, p, nb); + return chunk2mem (p); + } /* catch all failure paths */ __set_errno (ENOMEM); @@ -2677,26 +2721,27 @@ static void* sysmalloc(INTERNAL_SIZE_T nb, mstate av) /* - systrim is an inverse of sorts to sysmalloc. It gives memory back - to the system (via negative arguments to sbrk) if there is unused - memory at the `high' end of the malloc pool. It is called - automatically by free() when top space exceeds the trim - threshold. It is also called by the public malloc_trim routine. It - returns 1 if it actually released any memory, else 0. -*/ + systrim is an inverse of sorts to sysmalloc. It gives memory back + to the system (via negative arguments to sbrk) if there is unused + memory at the `high' end of the malloc pool. It is called + automatically by free() when top space exceeds the trim + threshold. It is also called by the public malloc_trim routine. It + returns 1 if it actually released any memory, else 0. + */ -static int systrim(size_t pad, mstate av) +static int +systrim (size_t pad, mstate av) { - long top_size; /* Amount of top-most memory */ - long extra; /* Amount to release */ - long released; /* Amount actually released */ - char* current_brk; /* address returned by pre-check sbrk call */ - char* new_brk; /* address returned by post-check sbrk call */ + long top_size; /* Amount of top-most memory */ + long extra; /* Amount to release */ + long released; /* Amount actually released */ + char *current_brk; /* address returned by pre-check sbrk call */ + char *new_brk; /* address returned by post-check sbrk call */ size_t pagesz; - long top_area; + long top_area; - pagesz = GLRO(dl_pagesize); - top_size = chunksize(av->top); + pagesz = GLRO (dl_pagesize); + top_size = chunksize (av->top); top_area = top_size - MINSIZE - 1; if (top_area <= pad) @@ -2706,53 +2751,55 @@ static int systrim(size_t pad, mstate av) extra = (top_area - pad) & ~(pagesz - 1); /* - Only proceed if end of memory is where we last set it. - This avoids problems if there were foreign sbrk calls. - */ - current_brk = (char*)(MORECORE(0)); - if (current_brk == (char*)(av->top) + top_size) { - - /* - Attempt to release memory. We ignore MORECORE return value, - and instead call again to find out where new end of memory is. - This avoids problems if first call releases less than we asked, - of if failure somehow altered brk value. (We could still - encounter problems if it altered brk in some very bad way, - but the only thing we can do is adjust anyway, which will cause - some downstream failure.) - */ - - MORECORE(-extra); - /* Call the `morecore' hook if necessary. */ - void (*hook) (void) = atomic_forced_read (__after_morecore_hook); - if (__builtin_expect (hook != NULL, 0)) - (*hook) (); - new_brk = (char*)(MORECORE(0)); - - LIBC_PROBE (memory_sbrk_less, 2, new_brk, extra); - - if (new_brk != (char*)MORECORE_FAILURE) { - released = (long)(current_brk - new_brk); - - if (released != 0) { - /* Success. Adjust top. */ - av->system_mem -= released; - set_head(av->top, (top_size - released) | PREV_INUSE); - check_malloc_state(av); - return 1; - } + Only proceed if end of memory is where we last set it. + This avoids problems if there were foreign sbrk calls. + */ + current_brk = (char *) (MORECORE (0)); + if (current_brk == (char *) (av->top) + top_size) + { + /* + Attempt to release memory. We ignore MORECORE return value, + and instead call again to find out where new end of memory is. + This avoids problems if first call releases less than we asked, + of if failure somehow altered brk value. (We could still + encounter problems if it altered brk in some very bad way, + but the only thing we can do is adjust anyway, which will cause + some downstream failure.) + */ + + MORECORE (-extra); + /* Call the `morecore' hook if necessary. */ + void (*hook) (void) = atomic_forced_read (__after_morecore_hook); + if (__builtin_expect (hook != NULL, 0)) + (*hook)(); + new_brk = (char *) (MORECORE (0)); + + LIBC_PROBE (memory_sbrk_less, 2, new_brk, extra); + + if (new_brk != (char *) MORECORE_FAILURE) + { + released = (long) (current_brk - new_brk); + + if (released != 0) + { + /* Success. Adjust top. */ + av->system_mem -= released; + set_head (av->top, (top_size - released) | PREV_INUSE); + check_malloc_state (av); + return 1; + } + } } - } return 0; } static void internal_function -munmap_chunk(mchunkptr p) +munmap_chunk (mchunkptr p) { - INTERNAL_SIZE_T size = chunksize(p); + INTERNAL_SIZE_T size = chunksize (p); - assert (chunk_is_mmapped(p)); + assert (chunk_is_mmapped (p)); uintptr_t block = (uintptr_t) p - p->prev_size; size_t total_size = p->prev_size + size; @@ -2761,10 +2808,10 @@ munmap_chunk(mchunkptr p) page size. But gcc does not recognize the optimization possibility (in the moment at least) so we combine the two values into one before the bit test. */ - if (__builtin_expect (((block | total_size) & (GLRO(dl_pagesize) - 1)) != 0, 0)) + if (__builtin_expect (((block | total_size) & (GLRO (dl_pagesize) - 1)) != 0, 0)) { malloc_printerr (check_action, "munmap_chunk(): invalid pointer", - chunk2mem (p)); + chunk2mem (p)); return; } @@ -2774,22 +2821,22 @@ munmap_chunk(mchunkptr p) /* If munmap failed the process virtual memory address space is in a bad shape. Just leave the block hanging around, the process will terminate shortly anyway since not much can be done. */ - __munmap((char *)block, total_size); + __munmap ((char *) block, total_size); } #if HAVE_MREMAP static mchunkptr internal_function -mremap_chunk(mchunkptr p, size_t new_size) +mremap_chunk (mchunkptr p, size_t new_size) { - size_t page_mask = GLRO(dl_pagesize) - 1; + size_t page_mask = GLRO (dl_pagesize) - 1; INTERNAL_SIZE_T offset = p->prev_size; - INTERNAL_SIZE_T size = chunksize(p); + INTERNAL_SIZE_T size = chunksize (p); char *cp; - assert (chunk_is_mmapped(p)); - assert(((size + offset) & (GLRO(dl_pagesize)-1)) == 0); + assert (chunk_is_mmapped (p)); + assert (((size + offset) & (GLRO (dl_pagesize) - 1)) == 0); /* Note the extra SIZE_SZ overhead as in mmap_chunk(). */ new_size = (new_size + offset + SIZE_SZ + page_mask) & ~page_mask; @@ -2798,31 +2845,31 @@ mremap_chunk(mchunkptr p, size_t new_size) if (size + offset == new_size) return p; - cp = (char *)__mremap((char *)p - offset, size + offset, new_size, - MREMAP_MAYMOVE); + cp = (char *) __mremap ((char *) p - offset, size + offset, new_size, + MREMAP_MAYMOVE); - if (cp == MAP_FAILED) return 0; + if (cp == MAP_FAILED) + return 0; - p = (mchunkptr)(cp + offset); + p = (mchunkptr) (cp + offset); - assert(aligned_OK(chunk2mem(p))); + assert (aligned_OK (chunk2mem (p))); - assert((p->prev_size == offset)); - set_head(p, (new_size - offset)|IS_MMAPPED); + assert ((p->prev_size == offset)); + set_head (p, (new_size - offset) | IS_MMAPPED); INTERNAL_SIZE_T new; new = atomic_exchange_and_add (&mp_.mmapped_mem, new_size - size - offset) - + new_size - size - offset; + + new_size - size - offset; atomic_max (&mp_.max_mmapped_mem, new); return p; } - #endif /* HAVE_MREMAP */ /*------------------------ Public wrappers. --------------------------------*/ -void* -__libc_malloc(size_t bytes) +void * +__libc_malloc (size_t bytes) { mstate ar_ptr; void *victim; @@ -2832,73 +2879,78 @@ __libc_malloc(size_t bytes) if (__builtin_expect (hook != NULL, 0)) return (*hook)(bytes, RETURN_ADDRESS (0)); - arena_lookup(ar_ptr); + arena_lookup (ar_ptr); - arena_lock(ar_ptr, bytes); - if(!ar_ptr) + arena_lock (ar_ptr, bytes); + if (!ar_ptr) return 0; - victim = _int_malloc(ar_ptr, bytes); - if(!victim) { - LIBC_PROBE (memory_malloc_retry, 1, bytes); - ar_ptr = arena_get_retry(ar_ptr, bytes); - if (__builtin_expect(ar_ptr != NULL, 1)) { - victim = _int_malloc(ar_ptr, bytes); - (void)mutex_unlock(&ar_ptr->mutex); + + victim = _int_malloc (ar_ptr, bytes); + if (!victim) + { + LIBC_PROBE (memory_malloc_retry, 1, bytes); + ar_ptr = arena_get_retry (ar_ptr, bytes); + if (__builtin_expect (ar_ptr != NULL, 1)) + { + victim = _int_malloc (ar_ptr, bytes); + (void) mutex_unlock (&ar_ptr->mutex); + } } - } else - (void)mutex_unlock(&ar_ptr->mutex); - assert(!victim || chunk_is_mmapped(mem2chunk(victim)) || - ar_ptr == arena_for_chunk(mem2chunk(victim))); + else + (void) mutex_unlock (&ar_ptr->mutex); + assert (!victim || chunk_is_mmapped (mem2chunk (victim)) || + ar_ptr == arena_for_chunk (mem2chunk (victim))); return victim; } -libc_hidden_def(__libc_malloc) +libc_hidden_def (__libc_malloc) void -__libc_free(void* mem) +__libc_free (void *mem) { mstate ar_ptr; mchunkptr p; /* chunk corresponding to mem */ void (*hook) (void *, const void *) = atomic_forced_read (__free_hook); - if (__builtin_expect (hook != NULL, 0)) { - (*hook)(mem, RETURN_ADDRESS (0)); - return; - } + if (__builtin_expect (hook != NULL, 0)) + { + (*hook)(mem, RETURN_ADDRESS (0)); + return; + } if (mem == 0) /* free(0) has no effect */ return; - p = mem2chunk(mem); + p = mem2chunk (mem); - if (chunk_is_mmapped(p)) /* release mmapped memory. */ - { - /* see if the dynamic brk/mmap threshold needs adjusting */ - if (!mp_.no_dyn_threshold - && p->size > mp_.mmap_threshold - && p->size <= DEFAULT_MMAP_THRESHOLD_MAX) - { - mp_.mmap_threshold = chunksize (p); - mp_.trim_threshold = 2 * mp_.mmap_threshold; - LIBC_PROBE (memory_mallopt_free_dyn_thresholds, 2, - mp_.mmap_threshold, mp_.trim_threshold); - } - munmap_chunk(p); - return; - } + if (chunk_is_mmapped (p)) /* release mmapped memory. */ + { + /* see if the dynamic brk/mmap threshold needs adjusting */ + if (!mp_.no_dyn_threshold + && p->size > mp_.mmap_threshold + && p->size <= DEFAULT_MMAP_THRESHOLD_MAX) + { + mp_.mmap_threshold = chunksize (p); + mp_.trim_threshold = 2 * mp_.mmap_threshold; + LIBC_PROBE (memory_mallopt_free_dyn_thresholds, 2, + mp_.mmap_threshold, mp_.trim_threshold); + } + munmap_chunk (p); + return; + } - ar_ptr = arena_for_chunk(p); - _int_free(ar_ptr, p, 0); + ar_ptr = arena_for_chunk (p); + _int_free (ar_ptr, p, 0); } libc_hidden_def (__libc_free) -void* -__libc_realloc(void* oldmem, size_t bytes) +void * +__libc_realloc (void *oldmem, size_t bytes) { mstate ar_ptr; - INTERNAL_SIZE_T nb; /* padded request size */ + INTERNAL_SIZE_T nb; /* padded request size */ - void* newp; /* chunk to return */ + void *newp; /* chunk to return */ void *(*hook) (void *, size_t, const void *) = atomic_forced_read (__realloc_hook); @@ -2906,16 +2958,20 @@ __libc_realloc(void* oldmem, size_t bytes) return (*hook)(oldmem, bytes, RETURN_ADDRESS (0)); #if REALLOC_ZERO_BYTES_FREES - if (bytes == 0 && oldmem != NULL) { __libc_free(oldmem); return 0; } + if (bytes == 0 && oldmem != NULL) + { + __libc_free (oldmem); return 0; + } #endif /* realloc of null is supposed to be same as malloc */ - if (oldmem == 0) return __libc_malloc(bytes); + if (oldmem == 0) + return __libc_malloc (bytes); /* chunk corresponding to oldmem */ - const mchunkptr oldp = mem2chunk(oldmem); + const mchunkptr oldp = mem2chunk (oldmem); /* its size */ - const INTERNAL_SIZE_T oldsize = chunksize(oldp); + const INTERNAL_SIZE_T oldsize = chunksize (oldp); /* Little security check which won't hurt performance: the allocator never wrapps around at the end of the address space. @@ -2928,63 +2984,69 @@ __libc_realloc(void* oldmem, size_t bytes) return NULL; } - checked_request2size(bytes, nb); + checked_request2size (bytes, nb); - if (chunk_is_mmapped(oldp)) - { - void* newmem; + if (chunk_is_mmapped (oldp)) + { + void *newmem; #if HAVE_MREMAP - newp = mremap_chunk(oldp, nb); - if(newp) return chunk2mem(newp); + newp = mremap_chunk (oldp, nb); + if (newp) + return chunk2mem (newp); #endif - /* Note the extra SIZE_SZ overhead. */ - if(oldsize - SIZE_SZ >= nb) return oldmem; /* do nothing */ - /* Must alloc, copy, free. */ - newmem = __libc_malloc(bytes); - if (newmem == 0) return 0; /* propagate failure */ - memcpy(newmem, oldmem, oldsize - 2*SIZE_SZ); - munmap_chunk(oldp); - return newmem; - } + /* Note the extra SIZE_SZ overhead. */ + if (oldsize - SIZE_SZ >= nb) + return oldmem; /* do nothing */ + + /* Must alloc, copy, free. */ + newmem = __libc_malloc (bytes); + if (newmem == 0) + return 0; /* propagate failure */ + + memcpy (newmem, oldmem, oldsize - 2 * SIZE_SZ); + munmap_chunk (oldp); + return newmem; + } - ar_ptr = arena_for_chunk(oldp); + ar_ptr = arena_for_chunk (oldp); #if THREAD_STATS - if(!mutex_trylock(&ar_ptr->mutex)) + if (!mutex_trylock (&ar_ptr->mutex)) ++(ar_ptr->stat_lock_direct); - else { - (void)mutex_lock(&ar_ptr->mutex); - ++(ar_ptr->stat_lock_wait); - } + else + { + (void) mutex_lock (&ar_ptr->mutex); + ++(ar_ptr->stat_lock_wait); + } #else - (void)mutex_lock(&ar_ptr->mutex); + (void) mutex_lock (&ar_ptr->mutex); #endif - newp = _int_realloc(ar_ptr, oldp, oldsize, nb); + newp = _int_realloc (ar_ptr, oldp, oldsize, nb); - (void)mutex_unlock(&ar_ptr->mutex); - assert(!newp || chunk_is_mmapped(mem2chunk(newp)) || - ar_ptr == arena_for_chunk(mem2chunk(newp))); + (void) mutex_unlock (&ar_ptr->mutex); + assert (!newp || chunk_is_mmapped (mem2chunk (newp)) || + ar_ptr == arena_for_chunk (mem2chunk (newp))); if (newp == NULL) { /* Try harder to allocate memory in other arenas. */ LIBC_PROBE (memory_realloc_retry, 2, bytes, oldmem); - newp = __libc_malloc(bytes); + newp = __libc_malloc (bytes); if (newp != NULL) - { - memcpy (newp, oldmem, oldsize - SIZE_SZ); - _int_free(ar_ptr, oldp, 0); - } + { + memcpy (newp, oldmem, oldsize - SIZE_SZ); + _int_free (ar_ptr, oldp, 0); + } } return newp; } libc_hidden_def (__libc_realloc) -void* -__libc_memalign(size_t alignment, size_t bytes) +void * +__libc_memalign (size_t alignment, size_t bytes) { void *address = RETURN_ADDRESS (0); return _mid_memalign (alignment, bytes, address); @@ -3002,10 +3064,12 @@ _mid_memalign (size_t alignment, size_t bytes, void *address) return (*hook)(alignment, bytes, address); /* If we need less alignment than we give anyway, just relay to malloc. */ - if (alignment <= MALLOC_ALIGNMENT) return __libc_malloc(bytes); + if (alignment <= MALLOC_ALIGNMENT) + return __libc_malloc (bytes); /* Otherwise, ensure that it is at least a minimum chunk size */ - if (alignment < MINSIZE) alignment = MINSIZE; + if (alignment < MINSIZE) + alignment = MINSIZE; /* If the alignment is greater than SIZE_MAX / 2 + 1 it cannot be a power of 2 and will cause overflow in the check below. */ @@ -3024,58 +3088,63 @@ _mid_memalign (size_t alignment, size_t bytes, void *address) /* Make sure alignment is power of 2. */ - if (!powerof2(alignment)) { - size_t a = MALLOC_ALIGNMENT * 2; - while (a < alignment) a <<= 1; - alignment = a; - } + if (!powerof2 (alignment)) + { + size_t a = MALLOC_ALIGNMENT * 2; + while (a < alignment) + a <<= 1; + alignment = a; + } - arena_get(ar_ptr, bytes + alignment + MINSIZE); - if(!ar_ptr) + arena_get (ar_ptr, bytes + alignment + MINSIZE); + if (!ar_ptr) return 0; - p = _int_memalign(ar_ptr, alignment, bytes); - if(!p) { - LIBC_PROBE (memory_memalign_retry, 2, bytes, alignment); - ar_ptr = arena_get_retry (ar_ptr, bytes); - if (__builtin_expect(ar_ptr != NULL, 1)) { - p = _int_memalign(ar_ptr, alignment, bytes); - (void)mutex_unlock(&ar_ptr->mutex); + + p = _int_memalign (ar_ptr, alignment, bytes); + if (!p) + { + LIBC_PROBE (memory_memalign_retry, 2, bytes, alignment); + ar_ptr = arena_get_retry (ar_ptr, bytes); + if (__builtin_expect (ar_ptr != NULL, 1)) + { + p = _int_memalign (ar_ptr, alignment, bytes); + (void) mutex_unlock (&ar_ptr->mutex); + } } - } else - (void)mutex_unlock(&ar_ptr->mutex); - assert(!p || chunk_is_mmapped(mem2chunk(p)) || - ar_ptr == arena_for_chunk(mem2chunk(p))); + else + (void) mutex_unlock (&ar_ptr->mutex); + assert (!p || chunk_is_mmapped (mem2chunk (p)) || + ar_ptr == arena_for_chunk (mem2chunk (p))); return p; } /* For ISO C11. */ weak_alias (__libc_memalign, aligned_alloc) libc_hidden_def (__libc_memalign) -void* -__libc_valloc(size_t bytes) +void * +__libc_valloc (size_t bytes) { - if(__malloc_initialized < 0) + if (__malloc_initialized < 0) ptmalloc_init (); void *address = RETURN_ADDRESS (0); - size_t pagesz = GLRO(dl_pagesize); + size_t pagesz = GLRO (dl_pagesize); return _mid_memalign (pagesz, bytes, address); } -void* -__libc_pvalloc(size_t bytes) +void * +__libc_pvalloc (size_t bytes) { - - if(__malloc_initialized < 0) + if (__malloc_initialized < 0) ptmalloc_init (); void *address = RETURN_ADDRESS (0); - size_t pagesz = GLRO(dl_pagesize); - size_t page_mask = GLRO(dl_pagesize) - 1; + size_t pagesz = GLRO (dl_pagesize); + size_t page_mask = GLRO (dl_pagesize) - 1; size_t rounded_bytes = (bytes + page_mask) & ~(page_mask); /* Check for overflow. */ - if (bytes > SIZE_MAX - 2*pagesz - MINSIZE) + if (bytes > SIZE_MAX - 2 * pagesz - MINSIZE) { __set_errno (ENOMEM); return 0; @@ -3084,235 +3153,254 @@ __libc_pvalloc(size_t bytes) return _mid_memalign (pagesz, rounded_bytes, address); } -void* -__libc_calloc(size_t n, size_t elem_size) +void * +__libc_calloc (size_t n, size_t elem_size) { mstate av; mchunkptr oldtop, p; INTERNAL_SIZE_T bytes, sz, csz, oldtopsize; - void* mem; + void *mem; unsigned long clearsize; unsigned long nclears; - INTERNAL_SIZE_T* d; + INTERNAL_SIZE_T *d; /* size_t is unsigned so the behavior on overflow is defined. */ bytes = n * elem_size; #define HALF_INTERNAL_SIZE_T \ (((INTERNAL_SIZE_T) 1) << (8 * sizeof (INTERNAL_SIZE_T) / 2)) - if (__builtin_expect ((n | elem_size) >= HALF_INTERNAL_SIZE_T, 0)) { - if (elem_size != 0 && bytes / elem_size != n) { - __set_errno (ENOMEM); - return 0; + if (__builtin_expect ((n | elem_size) >= HALF_INTERNAL_SIZE_T, 0)) + { + if (elem_size != 0 && bytes / elem_size != n) + { + __set_errno (ENOMEM); + return 0; + } } - } void *(*hook) (size_t, const void *) = atomic_forced_read (__malloc_hook); - if (__builtin_expect (hook != NULL, 0)) { - sz = bytes; - mem = (*hook)(sz, RETURN_ADDRESS (0)); - if(mem == 0) - return 0; - return memset(mem, 0, sz); - } + if (__builtin_expect (hook != NULL, 0)) + { + sz = bytes; + mem = (*hook)(sz, RETURN_ADDRESS (0)); + if (mem == 0) + return 0; + + return memset (mem, 0, sz); + } sz = bytes; - arena_get(av, sz); - if(!av) + arena_get (av, sz); + if (!av) return 0; /* Check if we hand out the top chunk, in which case there may be no need to clear. */ #if MORECORE_CLEARS - oldtop = top(av); - oldtopsize = chunksize(top(av)); -#if MORECORE_CLEARS < 2 + oldtop = top (av); + oldtopsize = chunksize (top (av)); +# if MORECORE_CLEARS < 2 /* Only newly allocated memory is guaranteed to be cleared. */ if (av == &main_arena && - oldtopsize < mp_.sbrk_base + av->max_system_mem - (char *)oldtop) - oldtopsize = (mp_.sbrk_base + av->max_system_mem - (char *)oldtop); -#endif + oldtopsize < mp_.sbrk_base + av->max_system_mem - (char *) oldtop) + oldtopsize = (mp_.sbrk_base + av->max_system_mem - (char *) oldtop); +# endif if (av != &main_arena) { heap_info *heap = heap_for_ptr (oldtop); if (oldtopsize < (char *) heap + heap->mprotect_size - (char *) oldtop) - oldtopsize = (char *) heap + heap->mprotect_size - (char *) oldtop; + oldtopsize = (char *) heap + heap->mprotect_size - (char *) oldtop; } #endif - mem = _int_malloc(av, sz); + mem = _int_malloc (av, sz); - assert(!mem || chunk_is_mmapped(mem2chunk(mem)) || - av == arena_for_chunk(mem2chunk(mem))); + assert (!mem || chunk_is_mmapped (mem2chunk (mem)) || + av == arena_for_chunk (mem2chunk (mem))); - if (mem == 0) { - LIBC_PROBE (memory_calloc_retry, 1, sz); - av = arena_get_retry (av, sz); - if (__builtin_expect(av != NULL, 1)) { - mem = _int_malloc(av, sz); - (void)mutex_unlock(&av->mutex); + if (mem == 0) + { + LIBC_PROBE (memory_calloc_retry, 1, sz); + av = arena_get_retry (av, sz); + if (__builtin_expect (av != NULL, 1)) + { + mem = _int_malloc (av, sz); + (void) mutex_unlock (&av->mutex); + } + if (mem == 0) + return 0; } - if (mem == 0) return 0; - } else - (void)mutex_unlock(&av->mutex); - p = mem2chunk(mem); + else + (void) mutex_unlock (&av->mutex); + p = mem2chunk (mem); /* Two optional cases in which clearing not necessary */ if (chunk_is_mmapped (p)) { if (__builtin_expect (perturb_byte, 0)) - return memset (mem, 0, sz); + return memset (mem, 0, sz); + return mem; } - csz = chunksize(p); + csz = chunksize (p); #if MORECORE_CLEARS - if (perturb_byte == 0 && (p == oldtop && csz > oldtopsize)) { - /* clear only the bytes from non-freshly-sbrked memory */ - csz = oldtopsize; - } + if (perturb_byte == 0 && (p == oldtop && csz > oldtopsize)) + { + /* clear only the bytes from non-freshly-sbrked memory */ + csz = oldtopsize; + } #endif /* Unroll clear of <= 36 bytes (72 if 8byte sizes). We know that contents have an odd number of INTERNAL_SIZE_T-sized words; minimally 3. */ - d = (INTERNAL_SIZE_T*)mem; + d = (INTERNAL_SIZE_T *) mem; clearsize = csz - SIZE_SZ; - nclears = clearsize / sizeof(INTERNAL_SIZE_T); - assert(nclears >= 3); + nclears = clearsize / sizeof (INTERNAL_SIZE_T); + assert (nclears >= 3); if (nclears > 9) - return memset(d, 0, clearsize); + return memset (d, 0, clearsize); - else { - *(d+0) = 0; - *(d+1) = 0; - *(d+2) = 0; - if (nclears > 4) { - *(d+3) = 0; - *(d+4) = 0; - if (nclears > 6) { - *(d+5) = 0; - *(d+6) = 0; - if (nclears > 8) { - *(d+7) = 0; - *(d+8) = 0; - } - } + else + { + *(d + 0) = 0; + *(d + 1) = 0; + *(d + 2) = 0; + if (nclears > 4) + { + *(d + 3) = 0; + *(d + 4) = 0; + if (nclears > 6) + { + *(d + 5) = 0; + *(d + 6) = 0; + if (nclears > 8) + { + *(d + 7) = 0; + *(d + 8) = 0; + } + } + } } - } return mem; } /* - ------------------------------ malloc ------------------------------ -*/ + ------------------------------ malloc ------------------------------ + */ -static void* -_int_malloc(mstate av, size_t bytes) +static void * +_int_malloc (mstate av, size_t bytes) { INTERNAL_SIZE_T nb; /* normalized request size */ - unsigned int idx; /* associated bin index */ - mbinptr bin; /* associated bin */ + unsigned int idx; /* associated bin index */ + mbinptr bin; /* associated bin */ - mchunkptr victim; /* inspected/selected chunk */ + mchunkptr victim; /* inspected/selected chunk */ INTERNAL_SIZE_T size; /* its size */ - int victim_index; /* its bin index */ + int victim_index; /* its bin index */ - mchunkptr remainder; /* remainder from a split */ - unsigned long remainder_size; /* its size */ + mchunkptr remainder; /* remainder from a split */ + unsigned long remainder_size; /* its size */ - unsigned int block; /* bit map traverser */ - unsigned int bit; /* bit map traverser */ - unsigned int map; /* current word of binmap */ + unsigned int block; /* bit map traverser */ + unsigned int bit; /* bit map traverser */ + unsigned int map; /* current word of binmap */ - mchunkptr fwd; /* misc temp for linking */ - mchunkptr bck; /* misc temp for linking */ + mchunkptr fwd; /* misc temp for linking */ + mchunkptr bck; /* misc temp for linking */ const char *errstr = NULL; /* - Convert request size to internal form by adding SIZE_SZ bytes - overhead plus possibly more to obtain necessary alignment and/or - to obtain a size of at least MINSIZE, the smallest allocatable - size. Also, checked_request2size traps (returning 0) request sizes - that are so large that they wrap around zero when padded and - aligned. - */ + Convert request size to internal form by adding SIZE_SZ bytes + overhead plus possibly more to obtain necessary alignment and/or + to obtain a size of at least MINSIZE, the smallest allocatable + size. Also, checked_request2size traps (returning 0) request sizes + that are so large that they wrap around zero when padded and + aligned. + */ - checked_request2size(bytes, nb); + checked_request2size (bytes, nb); /* - If the size qualifies as a fastbin, first check corresponding bin. - This code is safe to execute even if av is not yet initialized, so we - can try it without checking, which saves some time on this fast path. - */ + If the size qualifies as a fastbin, first check corresponding bin. + This code is safe to execute even if av is not yet initialized, so we + can try it without checking, which saves some time on this fast path. + */ - if ((unsigned long)(nb) <= (unsigned long)(get_max_fast ())) { - idx = fastbin_index(nb); - mfastbinptr* fb = &fastbin (av, idx); - mchunkptr pp = *fb; - do - { - victim = pp; - if (victim == NULL) - break; - } - while ((pp = catomic_compare_and_exchange_val_acq (fb, victim->fd, victim)) - != victim); - if (victim != 0) { - if (__builtin_expect (fastbin_index (chunksize (victim)) != idx, 0)) - { - errstr = "malloc(): memory corruption (fast)"; - errout: - malloc_printerr (check_action, errstr, chunk2mem (victim)); - return NULL; - } - check_remalloced_chunk(av, victim, nb); - void *p = chunk2mem(victim); - alloc_perturb (p, bytes); - return p; + if ((unsigned long) (nb) <= (unsigned long) (get_max_fast ())) + { + idx = fastbin_index (nb); + mfastbinptr *fb = &fastbin (av, idx); + mchunkptr pp = *fb; + do + { + victim = pp; + if (victim == NULL) + break; + } + while ((pp = catomic_compare_and_exchange_val_acq (fb, victim->fd, victim)) + != victim); + if (victim != 0) + { + if (__builtin_expect (fastbin_index (chunksize (victim)) != idx, 0)) + { + errstr = "malloc(): memory corruption (fast)"; + errout: + malloc_printerr (check_action, errstr, chunk2mem (victim)); + return NULL; + } + check_remalloced_chunk (av, victim, nb); + void *p = chunk2mem (victim); + alloc_perturb (p, bytes); + return p; + } } - } /* - If a small request, check regular bin. Since these "smallbins" - hold one size each, no searching within bins is necessary. - (For a large request, we need to wait until unsorted chunks are - processed to find best fit. But for small ones, fits are exact - anyway, so we can check now, which is faster.) - */ - - if (in_smallbin_range(nb)) { - idx = smallbin_index(nb); - bin = bin_at(av,idx); - - if ( (victim = last(bin)) != bin) { - if (victim == 0) /* initialization check */ - malloc_consolidate(av); - else { - bck = victim->bk; - if (__builtin_expect (bck->fd != victim, 0)) - { - errstr = "malloc(): smallbin double linked list corrupted"; - goto errout; - } - set_inuse_bit_at_offset(victim, nb); - bin->bk = bck; - bck->fd = bin; - - if (av != &main_arena) - victim->size |= NON_MAIN_ARENA; - check_malloced_chunk(av, victim, nb); - void *p = chunk2mem(victim); - alloc_perturb (p, bytes); - return p; - } + If a small request, check regular bin. Since these "smallbins" + hold one size each, no searching within bins is necessary. + (For a large request, we need to wait until unsorted chunks are + processed to find best fit. But for small ones, fits are exact + anyway, so we can check now, which is faster.) + */ + + if (in_smallbin_range (nb)) + { + idx = smallbin_index (nb); + bin = bin_at (av, idx); + + if ((victim = last (bin)) != bin) + { + if (victim == 0) /* initialization check */ + malloc_consolidate (av); + else + { + bck = victim->bk; + if (__builtin_expect (bck->fd != victim, 0)) + { + errstr = "malloc(): smallbin double linked list corrupted"; + goto errout; + } + set_inuse_bit_at_offset (victim, nb); + bin->bk = bck; + bck->fd = bin; + + if (av != &main_arena) + victim->size |= NON_MAIN_ARENA; + check_malloced_chunk (av, victim, nb); + void *p = chunk2mem (victim); + alloc_perturb (p, bytes); + return p; + } + } } - } /* If this is a large request, consolidate fastbins before continuing. @@ -3323,394 +3411,417 @@ _int_malloc(mstate av, size_t bytes) large requests, but less often mixtures, so consolidation is not invoked all that often in most programs. And the programs that it is called frequently in otherwise tend to fragment. - */ + */ - else { - idx = largebin_index(nb); - if (have_fastchunks(av)) - malloc_consolidate(av); - } + else + { + idx = largebin_index (nb); + if (have_fastchunks (av)) + malloc_consolidate (av); + } /* - Process recently freed or remaindered chunks, taking one only if - it is exact fit, or, if this a small request, the chunk is remainder from - the most recent non-exact fit. Place other traversed chunks in - bins. Note that this step is the only place in any routine where - chunks are placed in bins. - - The outer loop here is needed because we might not realize until - near the end of malloc that we should have consolidated, so must - do so and retry. This happens at most once, and only when we would - otherwise need to expand memory to service a "small" request. - */ - - for(;;) { - - int iters = 0; - while ( (victim = unsorted_chunks(av)->bk) != unsorted_chunks(av)) { - bck = victim->bk; - if (__builtin_expect (victim->size <= 2 * SIZE_SZ, 0) - || __builtin_expect (victim->size > av->system_mem, 0)) - malloc_printerr (check_action, "malloc(): memory corruption", - chunk2mem (victim)); - size = chunksize(victim); + Process recently freed or remaindered chunks, taking one only if + it is exact fit, or, if this a small request, the chunk is remainder from + the most recent non-exact fit. Place other traversed chunks in + bins. Note that this step is the only place in any routine where + chunks are placed in bins. + + The outer loop here is needed because we might not realize until + near the end of malloc that we should have consolidated, so must + do so and retry. This happens at most once, and only when we would + otherwise need to expand memory to service a "small" request. + */ + + for (;; ) + { + int iters = 0; + while ((victim = unsorted_chunks (av)->bk) != unsorted_chunks (av)) + { + bck = victim->bk; + if (__builtin_expect (victim->size <= 2 * SIZE_SZ, 0) + || __builtin_expect (victim->size > av->system_mem, 0)) + malloc_printerr (check_action, "malloc(): memory corruption", + chunk2mem (victim)); + size = chunksize (victim); + + /* + If a small request, try to use last remainder if it is the + only chunk in unsorted bin. This helps promote locality for + runs of consecutive small requests. This is the only + exception to best-fit, and applies only when there is + no exact fit for a small chunk. + */ + + if (in_smallbin_range (nb) && + bck == unsorted_chunks (av) && + victim == av->last_remainder && + (unsigned long) (size) > (unsigned long) (nb + MINSIZE)) + { + /* split and reattach remainder */ + remainder_size = size - nb; + remainder = chunk_at_offset (victim, nb); + unsorted_chunks (av)->bk = unsorted_chunks (av)->fd = remainder; + av->last_remainder = remainder; + remainder->bk = remainder->fd = unsorted_chunks (av); + if (!in_smallbin_range (remainder_size)) + { + remainder->fd_nextsize = NULL; + remainder->bk_nextsize = NULL; + } + + set_head (victim, nb | PREV_INUSE | + (av != &main_arena ? NON_MAIN_ARENA : 0)); + set_head (remainder, remainder_size | PREV_INUSE); + set_foot (remainder, remainder_size); + + check_malloced_chunk (av, victim, nb); + void *p = chunk2mem (victim); + alloc_perturb (p, bytes); + return p; + } + + /* remove from unsorted list */ + unsorted_chunks (av)->bk = bck; + bck->fd = unsorted_chunks (av); + + /* Take now instead of binning if exact fit */ + + if (size == nb) + { + set_inuse_bit_at_offset (victim, size); + if (av != &main_arena) + victim->size |= NON_MAIN_ARENA; + check_malloced_chunk (av, victim, nb); + void *p = chunk2mem (victim); + alloc_perturb (p, bytes); + return p; + } + + /* place chunk in bin */ + + if (in_smallbin_range (size)) + { + victim_index = smallbin_index (size); + bck = bin_at (av, victim_index); + fwd = bck->fd; + } + else + { + victim_index = largebin_index (size); + bck = bin_at (av, victim_index); + fwd = bck->fd; + + /* maintain large bins in sorted order */ + if (fwd != bck) + { + /* Or with inuse bit to speed comparisons */ + size |= PREV_INUSE; + /* if smaller than smallest, bypass loop below */ + assert ((bck->bk->size & NON_MAIN_ARENA) == 0); + if ((unsigned long) (size) < (unsigned long) (bck->bk->size)) + { + fwd = bck; + bck = bck->bk; + + victim->fd_nextsize = fwd->fd; + victim->bk_nextsize = fwd->fd->bk_nextsize; + fwd->fd->bk_nextsize = victim->bk_nextsize->fd_nextsize = victim; + } + else + { + assert ((fwd->size & NON_MAIN_ARENA) == 0); + while ((unsigned long) size < fwd->size) + { + fwd = fwd->fd_nextsize; + assert ((fwd->size & NON_MAIN_ARENA) == 0); + } + + if ((unsigned long) size == (unsigned long) fwd->size) + /* Always insert in the second position. */ + fwd = fwd->fd; + else + { + victim->fd_nextsize = fwd; + victim->bk_nextsize = fwd->bk_nextsize; + fwd->bk_nextsize = victim; + victim->bk_nextsize->fd_nextsize = victim; + } + bck = fwd->bk; + } + } + else + victim->fd_nextsize = victim->bk_nextsize = victim; + } + + mark_bin (av, victim_index); + victim->bk = bck; + victim->fd = fwd; + fwd->bk = victim; + bck->fd = victim; + +#define MAX_ITERS 10000 + if (++iters >= MAX_ITERS) + break; + } /* - If a small request, try to use last remainder if it is the - only chunk in unsorted bin. This helps promote locality for - runs of consecutive small requests. This is the only - exception to best-fit, and applies only when there is - no exact fit for a small chunk. - */ + If a large request, scan through the chunks of current bin in + sorted order to find smallest that fits. Use the skip list for this. + */ + + if (!in_smallbin_range (nb)) + { + bin = bin_at (av, idx); + + /* skip scan if empty or largest chunk is too small */ + if ((victim = first (bin)) != bin && + (unsigned long) (victim->size) >= (unsigned long) (nb)) + { + victim = victim->bk_nextsize; + while (((unsigned long) (size = chunksize (victim)) < + (unsigned long) (nb))) + victim = victim->bk_nextsize; + + /* Avoid removing the first entry for a size so that the skip + list does not have to be rerouted. */ + if (victim != last (bin) && victim->size == victim->fd->size) + victim = victim->fd; + + remainder_size = size - nb; + unlink (victim, bck, fwd); + + /* Exhaust */ + if (remainder_size < MINSIZE) + { + set_inuse_bit_at_offset (victim, size); + if (av != &main_arena) + victim->size |= NON_MAIN_ARENA; + } + /* Split */ + else + { + remainder = chunk_at_offset (victim, nb); + /* We cannot assume the unsorted list is empty and therefore + have to perform a complete insert here. */ + bck = unsorted_chunks (av); + fwd = bck->fd; + if (__builtin_expect (fwd->bk != bck, 0)) + { + errstr = "malloc(): corrupted unsorted chunks"; + goto errout; + } + remainder->bk = bck; + remainder->fd = fwd; + bck->fd = remainder; + fwd->bk = remainder; + if (!in_smallbin_range (remainder_size)) + { + remainder->fd_nextsize = NULL; + remainder->bk_nextsize = NULL; + } + set_head (victim, nb | PREV_INUSE | + (av != &main_arena ? NON_MAIN_ARENA : 0)); + set_head (remainder, remainder_size | PREV_INUSE); + set_foot (remainder, remainder_size); + } + check_malloced_chunk (av, victim, nb); + void *p = chunk2mem (victim); + alloc_perturb (p, bytes); + return p; + } + } - if (in_smallbin_range(nb) && - bck == unsorted_chunks(av) && - victim == av->last_remainder && - (unsigned long)(size) > (unsigned long)(nb + MINSIZE)) { - - /* split and reattach remainder */ - remainder_size = size - nb; - remainder = chunk_at_offset(victim, nb); - unsorted_chunks(av)->bk = unsorted_chunks(av)->fd = remainder; - av->last_remainder = remainder; - remainder->bk = remainder->fd = unsorted_chunks(av); - if (!in_smallbin_range(remainder_size)) - { - remainder->fd_nextsize = NULL; - remainder->bk_nextsize = NULL; - } - - set_head(victim, nb | PREV_INUSE | - (av != &main_arena ? NON_MAIN_ARENA : 0)); - set_head(remainder, remainder_size | PREV_INUSE); - set_foot(remainder, remainder_size); - - check_malloced_chunk(av, victim, nb); - void *p = chunk2mem(victim); - alloc_perturb (p, bytes); - return p; - } - - /* remove from unsorted list */ - unsorted_chunks(av)->bk = bck; - bck->fd = unsorted_chunks(av); - - /* Take now instead of binning if exact fit */ - - if (size == nb) { - set_inuse_bit_at_offset(victim, size); - if (av != &main_arena) - victim->size |= NON_MAIN_ARENA; - check_malloced_chunk(av, victim, nb); - void *p = chunk2mem(victim); - alloc_perturb (p, bytes); - return p; - } - - /* place chunk in bin */ - - if (in_smallbin_range(size)) { - victim_index = smallbin_index(size); - bck = bin_at(av, victim_index); - fwd = bck->fd; - } - else { - victim_index = largebin_index(size); - bck = bin_at(av, victim_index); - fwd = bck->fd; - - /* maintain large bins in sorted order */ - if (fwd != bck) { - /* Or with inuse bit to speed comparisons */ - size |= PREV_INUSE; - /* if smaller than smallest, bypass loop below */ - assert((bck->bk->size & NON_MAIN_ARENA) == 0); - if ((unsigned long)(size) < (unsigned long)(bck->bk->size)) { - fwd = bck; - bck = bck->bk; - - victim->fd_nextsize = fwd->fd; - victim->bk_nextsize = fwd->fd->bk_nextsize; - fwd->fd->bk_nextsize = victim->bk_nextsize->fd_nextsize = victim; - } - else { - assert((fwd->size & NON_MAIN_ARENA) == 0); - while ((unsigned long) size < fwd->size) - { - fwd = fwd->fd_nextsize; - assert((fwd->size & NON_MAIN_ARENA) == 0); - } - - if ((unsigned long) size == (unsigned long) fwd->size) - /* Always insert in the second position. */ - fwd = fwd->fd; - else - { - victim->fd_nextsize = fwd; - victim->bk_nextsize = fwd->bk_nextsize; - fwd->bk_nextsize = victim; - victim->bk_nextsize->fd_nextsize = victim; - } - bck = fwd->bk; - } - } else - victim->fd_nextsize = victim->bk_nextsize = victim; - } - - mark_bin(av, victim_index); - victim->bk = bck; - victim->fd = fwd; - fwd->bk = victim; - bck->fd = victim; - -#define MAX_ITERS 10000 - if (++iters >= MAX_ITERS) - break; - } - - /* - If a large request, scan through the chunks of current bin in - sorted order to find smallest that fits. Use the skip list for this. - */ - - if (!in_smallbin_range(nb)) { - bin = bin_at(av, idx); - - /* skip scan if empty or largest chunk is too small */ - if ((victim = first(bin)) != bin && - (unsigned long)(victim->size) >= (unsigned long)(nb)) { - - victim = victim->bk_nextsize; - while (((unsigned long)(size = chunksize(victim)) < - (unsigned long)(nb))) - victim = victim->bk_nextsize; - - /* Avoid removing the first entry for a size so that the skip - list does not have to be rerouted. */ - if (victim != last(bin) && victim->size == victim->fd->size) - victim = victim->fd; - - remainder_size = size - nb; - unlink(victim, bck, fwd); - - /* Exhaust */ - if (remainder_size < MINSIZE) { - set_inuse_bit_at_offset(victim, size); - if (av != &main_arena) - victim->size |= NON_MAIN_ARENA; - } - /* Split */ - else { - remainder = chunk_at_offset(victim, nb); - /* We cannot assume the unsorted list is empty and therefore - have to perform a complete insert here. */ - bck = unsorted_chunks(av); - fwd = bck->fd; - if (__builtin_expect (fwd->bk != bck, 0)) - { - errstr = "malloc(): corrupted unsorted chunks"; - goto errout; - } - remainder->bk = bck; - remainder->fd = fwd; - bck->fd = remainder; - fwd->bk = remainder; - if (!in_smallbin_range(remainder_size)) - { - remainder->fd_nextsize = NULL; - remainder->bk_nextsize = NULL; - } - set_head(victim, nb | PREV_INUSE | - (av != &main_arena ? NON_MAIN_ARENA : 0)); - set_head(remainder, remainder_size | PREV_INUSE); - set_foot(remainder, remainder_size); - } - check_malloced_chunk(av, victim, nb); - void *p = chunk2mem(victim); - alloc_perturb (p, bytes); - return p; - } - } - - /* - Search for a chunk by scanning bins, starting with next largest - bin. This search is strictly by best-fit; i.e., the smallest - (with ties going to approximately the least recently used) chunk - that fits is selected. - - The bitmap avoids needing to check that most blocks are nonempty. - The particular case of skipping all bins during warm-up phases - when no chunks have been returned yet is faster than it might look. - */ - - ++idx; - bin = bin_at(av,idx); - block = idx2block(idx); - map = av->binmap[block]; - bit = idx2bit(idx); - - for (;;) { - - /* Skip rest of block if there are no more set bits in this block. */ - if (bit > map || bit == 0) { - do { - if (++block >= BINMAPSIZE) /* out of bins */ - goto use_top; - } while ( (map = av->binmap[block]) == 0); - - bin = bin_at(av, (block << BINMAPSHIFT)); - bit = 1; - } - - /* Advance to bin with set bit. There must be one. */ - while ((bit & map) == 0) { - bin = next_bin(bin); - bit <<= 1; - assert(bit != 0); - } - - /* Inspect the bin. It is likely to be non-empty */ - victim = last(bin); - - /* If a false alarm (empty bin), clear the bit. */ - if (victim == bin) { - av->binmap[block] = map &= ~bit; /* Write through */ - bin = next_bin(bin); - bit <<= 1; - } - - else { - size = chunksize(victim); - - /* We know the first chunk in this bin is big enough to use. */ - assert((unsigned long)(size) >= (unsigned long)(nb)); - - remainder_size = size - nb; - - /* unlink */ - unlink(victim, bck, fwd); - - /* Exhaust */ - if (remainder_size < MINSIZE) { - set_inuse_bit_at_offset(victim, size); - if (av != &main_arena) - victim->size |= NON_MAIN_ARENA; - } - - /* Split */ - else { - remainder = chunk_at_offset(victim, nb); - - /* We cannot assume the unsorted list is empty and therefore - have to perform a complete insert here. */ - bck = unsorted_chunks(av); - fwd = bck->fd; - if (__builtin_expect (fwd->bk != bck, 0)) - { - errstr = "malloc(): corrupted unsorted chunks 2"; - goto errout; - } - remainder->bk = bck; - remainder->fd = fwd; - bck->fd = remainder; - fwd->bk = remainder; - - /* advertise as last remainder */ - if (in_smallbin_range(nb)) - av->last_remainder = remainder; - if (!in_smallbin_range(remainder_size)) - { - remainder->fd_nextsize = NULL; - remainder->bk_nextsize = NULL; - } - set_head(victim, nb | PREV_INUSE | - (av != &main_arena ? NON_MAIN_ARENA : 0)); - set_head(remainder, remainder_size | PREV_INUSE); - set_foot(remainder, remainder_size); - } - check_malloced_chunk(av, victim, nb); - void *p = chunk2mem(victim); - alloc_perturb (p, bytes); - return p; - } - } - - use_top: - /* - If large enough, split off the chunk bordering the end of memory - (held in av->top). Note that this is in accord with the best-fit - search rule. In effect, av->top is treated as larger (and thus - less well fitting) than any other available chunk since it can - be extended to be as large as necessary (up to system - limitations). - - We require that av->top always exists (i.e., has size >= - MINSIZE) after initialization, so if it would otherwise be - exhausted by current request, it is replenished. (The main - reason for ensuring it exists is that we may need MINSIZE space - to put in fenceposts in sysmalloc.) - */ - - victim = av->top; - size = chunksize(victim); - - if ((unsigned long)(size) >= (unsigned long)(nb + MINSIZE)) { - remainder_size = size - nb; - remainder = chunk_at_offset(victim, nb); - av->top = remainder; - set_head(victim, nb | PREV_INUSE | - (av != &main_arena ? NON_MAIN_ARENA : 0)); - set_head(remainder, remainder_size | PREV_INUSE); - - check_malloced_chunk(av, victim, nb); - void *p = chunk2mem(victim); - alloc_perturb (p, bytes); - return p; - } + /* + Search for a chunk by scanning bins, starting with next largest + bin. This search is strictly by best-fit; i.e., the smallest + (with ties going to approximately the least recently used) chunk + that fits is selected. + + The bitmap avoids needing to check that most blocks are nonempty. + The particular case of skipping all bins during warm-up phases + when no chunks have been returned yet is faster than it might look. + */ + + ++idx; + bin = bin_at (av, idx); + block = idx2block (idx); + map = av->binmap[block]; + bit = idx2bit (idx); + + for (;; ) + { + /* Skip rest of block if there are no more set bits in this block. */ + if (bit > map || bit == 0) + { + do + { + if (++block >= BINMAPSIZE) /* out of bins */ + goto use_top; + } + while ((map = av->binmap[block]) == 0); + + bin = bin_at (av, (block << BINMAPSHIFT)); + bit = 1; + } + + /* Advance to bin with set bit. There must be one. */ + while ((bit & map) == 0) + { + bin = next_bin (bin); + bit <<= 1; + assert (bit != 0); + } + + /* Inspect the bin. It is likely to be non-empty */ + victim = last (bin); + + /* If a false alarm (empty bin), clear the bit. */ + if (victim == bin) + { + av->binmap[block] = map &= ~bit; /* Write through */ + bin = next_bin (bin); + bit <<= 1; + } + + else + { + size = chunksize (victim); + + /* We know the first chunk in this bin is big enough to use. */ + assert ((unsigned long) (size) >= (unsigned long) (nb)); + + remainder_size = size - nb; + + /* unlink */ + unlink (victim, bck, fwd); + + /* Exhaust */ + if (remainder_size < MINSIZE) + { + set_inuse_bit_at_offset (victim, size); + if (av != &main_arena) + victim->size |= NON_MAIN_ARENA; + } + + /* Split */ + else + { + remainder = chunk_at_offset (victim, nb); + + /* We cannot assume the unsorted list is empty and therefore + have to perform a complete insert here. */ + bck = unsorted_chunks (av); + fwd = bck->fd; + if (__builtin_expect (fwd->bk != bck, 0)) + { + errstr = "malloc(): corrupted unsorted chunks 2"; + goto errout; + } + remainder->bk = bck; + remainder->fd = fwd; + bck->fd = remainder; + fwd->bk = remainder; + + /* advertise as last remainder */ + if (in_smallbin_range (nb)) + av->last_remainder = remainder; + if (!in_smallbin_range (remainder_size)) + { + remainder->fd_nextsize = NULL; + remainder->bk_nextsize = NULL; + } + set_head (victim, nb | PREV_INUSE | + (av != &main_arena ? NON_MAIN_ARENA : 0)); + set_head (remainder, remainder_size | PREV_INUSE); + set_foot (remainder, remainder_size); + } + check_malloced_chunk (av, victim, nb); + void *p = chunk2mem (victim); + alloc_perturb (p, bytes); + return p; + } + } + + use_top: + /* + If large enough, split off the chunk bordering the end of memory + (held in av->top). Note that this is in accord with the best-fit + search rule. In effect, av->top is treated as larger (and thus + less well fitting) than any other available chunk since it can + be extended to be as large as necessary (up to system + limitations). + + We require that av->top always exists (i.e., has size >= + MINSIZE) after initialization, so if it would otherwise be + exhausted by current request, it is replenished. (The main + reason for ensuring it exists is that we may need MINSIZE space + to put in fenceposts in sysmalloc.) + */ + + victim = av->top; + size = chunksize (victim); + + if ((unsigned long) (size) >= (unsigned long) (nb + MINSIZE)) + { + remainder_size = size - nb; + remainder = chunk_at_offset (victim, nb); + av->top = remainder; + set_head (victim, nb | PREV_INUSE | + (av != &main_arena ? NON_MAIN_ARENA : 0)); + set_head (remainder, remainder_size | PREV_INUSE); + + check_malloced_chunk (av, victim, nb); + void *p = chunk2mem (victim); + alloc_perturb (p, bytes); + return p; + } + + /* When we are using atomic ops to free fast chunks we can get + here for all block sizes. */ + else if (have_fastchunks (av)) + { + malloc_consolidate (av); + /* restore original bin index */ + if (in_smallbin_range (nb)) + idx = smallbin_index (nb); + else + idx = largebin_index (nb); + } - /* When we are using atomic ops to free fast chunks we can get - here for all block sizes. */ - else if (have_fastchunks(av)) { - malloc_consolidate(av); - /* restore original bin index */ - if (in_smallbin_range(nb)) - idx = smallbin_index(nb); + /* + Otherwise, relay to handle system-dependent cases + */ else - idx = largebin_index(nb); + { + void *p = sysmalloc (nb, av); + if (p != NULL) + alloc_perturb (p, bytes); + return p; + } } - - /* - Otherwise, relay to handle system-dependent cases - */ - else { - void *p = sysmalloc(nb, av); - if (p != NULL) - alloc_perturb (p, bytes); - return p; - } - } } /* - ------------------------------ free ------------------------------ -*/ + ------------------------------ free ------------------------------ + */ static void -_int_free(mstate av, mchunkptr p, int have_lock) +_int_free (mstate av, mchunkptr p, int have_lock) { INTERNAL_SIZE_T size; /* its size */ - mfastbinptr* fb; /* associated fastbin */ - mchunkptr nextchunk; /* next contiguous chunk */ + mfastbinptr *fb; /* associated fastbin */ + mchunkptr nextchunk; /* next contiguous chunk */ INTERNAL_SIZE_T nextsize; /* its size */ - int nextinuse; /* true if nextchunk is used */ + int nextinuse; /* true if nextchunk is used */ INTERNAL_SIZE_T prevsize; /* size of previous contiguous chunk */ - mchunkptr bck; /* misc temp for linking */ - mchunkptr fwd; /* misc temp for linking */ + mchunkptr bck; /* misc temp for linking */ + mchunkptr fwd; /* misc temp for linking */ const char *errstr = NULL; int locked = 0; - size = chunksize(p); + size = chunksize (p); /* Little security check which won't hurt performance: the allocator never wrapps around at the end of the address space. @@ -3721,9 +3832,9 @@ _int_free(mstate av, mchunkptr p, int have_lock) { errstr = "free(): invalid pointer"; errout: - if (! have_lock && locked) - (void)mutex_unlock(&av->mutex); - malloc_printerr (check_action, errstr, chunk2mem(p)); + if (!have_lock && locked) + (void) mutex_unlock (&av->mutex); + malloc_printerr (check_action, errstr, chunk2mem (p)); return; } /* We know that each chunk is at least MINSIZE bytes in size or a @@ -4117,17 +4228,17 @@ _int_realloc(mstate av, mchunkptr oldp, INTERNAL_SIZE_T oldsize, { errstr = "realloc(): invalid old size"; errout: - malloc_printerr (check_action, errstr, chunk2mem(oldp)); + malloc_printerr (check_action, errstr, chunk2mem (oldp)); return NULL; } - check_inuse_chunk(av, oldp); + check_inuse_chunk (av, oldp); /* All callers already filter out mmap'ed chunks. */ - assert (!chunk_is_mmapped(oldp)); + assert (!chunk_is_mmapped (oldp)); - next = chunk_at_offset(oldp, oldsize); - INTERNAL_SIZE_T nextsize = chunksize(next); + next = chunk_at_offset (oldp, oldsize); + INTERNAL_SIZE_T nextsize = chunksize (next); if (__builtin_expect (next->size <= 2 * SIZE_SZ, 0) || __builtin_expect (nextsize >= av->system_mem, 0)) { @@ -4135,216 +4246,233 @@ _int_realloc(mstate av, mchunkptr oldp, INTERNAL_SIZE_T oldsize, goto errout; } - if ((unsigned long)(oldsize) >= (unsigned long)(nb)) { - /* already big enough; split below */ - newp = oldp; - newsize = oldsize; - } - - else { - /* Try to expand forward into top */ - if (next == av->top && - (unsigned long)(newsize = oldsize + nextsize) >= - (unsigned long)(nb + MINSIZE)) { - set_head_size(oldp, nb | (av != &main_arena ? NON_MAIN_ARENA : 0)); - av->top = chunk_at_offset(oldp, nb); - set_head(av->top, (newsize - nb) | PREV_INUSE); - check_inuse_chunk(av, oldp); - return chunk2mem(oldp); - } - - /* Try to expand forward into next chunk; split off remainder below */ - else if (next != av->top && - !inuse(next) && - (unsigned long)(newsize = oldsize + nextsize) >= - (unsigned long)(nb)) { + if ((unsigned long) (oldsize) >= (unsigned long) (nb)) + { + /* already big enough; split below */ newp = oldp; - unlink(next, bck, fwd); + newsize = oldsize; } - /* allocate, copy, free */ - else { - newmem = _int_malloc(av, nb - MALLOC_ALIGN_MASK); - if (newmem == 0) - return 0; /* propagate failure */ - - newp = mem2chunk(newmem); - newsize = chunksize(newp); - - /* - Avoid copy if newp is next chunk after oldp. - */ - if (newp == next) { - newsize += oldsize; - newp = oldp; - } - else { - /* - Unroll copy of <= 36 bytes (72 if 8byte sizes) - We know that contents have an odd number of - INTERNAL_SIZE_T-sized words; minimally 3. - */ - - copysize = oldsize - SIZE_SZ; - s = (INTERNAL_SIZE_T*)(chunk2mem(oldp)); - d = (INTERNAL_SIZE_T*)(newmem); - ncopies = copysize / sizeof(INTERNAL_SIZE_T); - assert(ncopies >= 3); - - if (ncopies > 9) - memcpy(d, s, copysize); - - else { - *(d+0) = *(s+0); - *(d+1) = *(s+1); - *(d+2) = *(s+2); - if (ncopies > 4) { - *(d+3) = *(s+3); - *(d+4) = *(s+4); - if (ncopies > 6) { - *(d+5) = *(s+5); - *(d+6) = *(s+6); - if (ncopies > 8) { - *(d+7) = *(s+7); - *(d+8) = *(s+8); - } - } - } - } - - _int_free(av, oldp, 1); - check_inuse_chunk(av, newp); - return chunk2mem(newp); - } + else + { + /* Try to expand forward into top */ + if (next == av->top && + (unsigned long) (newsize = oldsize + nextsize) >= + (unsigned long) (nb + MINSIZE)) + { + set_head_size (oldp, nb | (av != &main_arena ? NON_MAIN_ARENA : 0)); + av->top = chunk_at_offset (oldp, nb); + set_head (av->top, (newsize - nb) | PREV_INUSE); + check_inuse_chunk (av, oldp); + return chunk2mem (oldp); + } + + /* Try to expand forward into next chunk; split off remainder below */ + else if (next != av->top && + !inuse (next) && + (unsigned long) (newsize = oldsize + nextsize) >= + (unsigned long) (nb)) + { + newp = oldp; + unlink (next, bck, fwd); + } + + /* allocate, copy, free */ + else + { + newmem = _int_malloc (av, nb - MALLOC_ALIGN_MASK); + if (newmem == 0) + return 0; /* propagate failure */ + + newp = mem2chunk (newmem); + newsize = chunksize (newp); + + /* + Avoid copy if newp is next chunk after oldp. + */ + if (newp == next) + { + newsize += oldsize; + newp = oldp; + } + else + { + /* + Unroll copy of <= 36 bytes (72 if 8byte sizes) + We know that contents have an odd number of + INTERNAL_SIZE_T-sized words; minimally 3. + */ + + copysize = oldsize - SIZE_SZ; + s = (INTERNAL_SIZE_T *) (chunk2mem (oldp)); + d = (INTERNAL_SIZE_T *) (newmem); + ncopies = copysize / sizeof (INTERNAL_SIZE_T); + assert (ncopies >= 3); + + if (ncopies > 9) + memcpy (d, s, copysize); + + else + { + *(d + 0) = *(s + 0); + *(d + 1) = *(s + 1); + *(d + 2) = *(s + 2); + if (ncopies > 4) + { + *(d + 3) = *(s + 3); + *(d + 4) = *(s + 4); + if (ncopies > 6) + { + *(d + 5) = *(s + 5); + *(d + 6) = *(s + 6); + if (ncopies > 8) + { + *(d + 7) = *(s + 7); + *(d + 8) = *(s + 8); + } + } + } + } + + _int_free (av, oldp, 1); + check_inuse_chunk (av, newp); + return chunk2mem (newp); + } + } } - } /* If possible, free extra space in old or extended chunk */ - assert((unsigned long)(newsize) >= (unsigned long)(nb)); + assert ((unsigned long) (newsize) >= (unsigned long) (nb)); remainder_size = newsize - nb; - if (remainder_size < MINSIZE) { /* not enough extra to split off */ - set_head_size(newp, newsize | (av != &main_arena ? NON_MAIN_ARENA : 0)); - set_inuse_bit_at_offset(newp, newsize); - } - else { /* split remainder */ - remainder = chunk_at_offset(newp, nb); - set_head_size(newp, nb | (av != &main_arena ? NON_MAIN_ARENA : 0)); - set_head(remainder, remainder_size | PREV_INUSE | - (av != &main_arena ? NON_MAIN_ARENA : 0)); - /* Mark remainder as inuse so free() won't complain */ - set_inuse_bit_at_offset(remainder, remainder_size); - _int_free(av, remainder, 1); - } + if (remainder_size < MINSIZE) /* not enough extra to split off */ + { + set_head_size (newp, newsize | (av != &main_arena ? NON_MAIN_ARENA : 0)); + set_inuse_bit_at_offset (newp, newsize); + } + else /* split remainder */ + { + remainder = chunk_at_offset (newp, nb); + set_head_size (newp, nb | (av != &main_arena ? NON_MAIN_ARENA : 0)); + set_head (remainder, remainder_size | PREV_INUSE | + (av != &main_arena ? NON_MAIN_ARENA : 0)); + /* Mark remainder as inuse so free() won't complain */ + set_inuse_bit_at_offset (remainder, remainder_size); + _int_free (av, remainder, 1); + } - check_inuse_chunk(av, newp); - return chunk2mem(newp); + check_inuse_chunk (av, newp); + return chunk2mem (newp); } /* - ------------------------------ memalign ------------------------------ -*/ + ------------------------------ memalign ------------------------------ + */ -static void* -_int_memalign(mstate av, size_t alignment, size_t bytes) +static void * +_int_memalign (mstate av, size_t alignment, size_t bytes) { INTERNAL_SIZE_T nb; /* padded request size */ - char* m; /* memory returned by malloc call */ - mchunkptr p; /* corresponding chunk */ - char* brk; /* alignment point within p */ - mchunkptr newp; /* chunk to return */ + char *m; /* memory returned by malloc call */ + mchunkptr p; /* corresponding chunk */ + char *brk; /* alignment point within p */ + mchunkptr newp; /* chunk to return */ INTERNAL_SIZE_T newsize; /* its size */ INTERNAL_SIZE_T leadsize; /* leading space before alignment point */ - mchunkptr remainder; /* spare room at end to split off */ - unsigned long remainder_size; /* its size */ + mchunkptr remainder; /* spare room at end to split off */ + unsigned long remainder_size; /* its size */ INTERNAL_SIZE_T size; - checked_request2size(bytes, nb); + checked_request2size (bytes, nb); /* - Strategy: find a spot within that chunk that meets the alignment - request, and then possibly free the leading and trailing space. - */ + Strategy: find a spot within that chunk that meets the alignment + request, and then possibly free the leading and trailing space. + */ /* Call malloc with worst case padding to hit alignment. */ - m = (char*)(_int_malloc(av, nb + alignment + MINSIZE)); - - if (m == 0) return 0; /* propagate failure */ - - p = mem2chunk(m); - - if ((((unsigned long)(m)) % alignment) != 0) { /* misaligned */ - - /* - Find an aligned spot inside chunk. Since we need to give back - leading space in a chunk of at least MINSIZE, if the first - calculation places us at a spot with less than MINSIZE leader, - we can move to the next aligned spot -- we've allocated enough - total room so that this is always possible. - */ - - brk = (char*)mem2chunk(((unsigned long)(m + alignment - 1)) & - -((signed long) alignment)); - if ((unsigned long)(brk - (char*)(p)) < MINSIZE) - brk += alignment; - - newp = (mchunkptr)brk; - leadsize = brk - (char*)(p); - newsize = chunksize(p) - leadsize; - - /* For mmapped chunks, just adjust offset */ - if (chunk_is_mmapped(p)) { - newp->prev_size = p->prev_size + leadsize; - set_head(newp, newsize|IS_MMAPPED); - return chunk2mem(newp); + m = (char *) (_int_malloc (av, nb + alignment + MINSIZE)); + + if (m == 0) + return 0; /* propagate failure */ + + p = mem2chunk (m); + + if ((((unsigned long) (m)) % alignment) != 0) /* misaligned */ + + { /* + Find an aligned spot inside chunk. Since we need to give back + leading space in a chunk of at least MINSIZE, if the first + calculation places us at a spot with less than MINSIZE leader, + we can move to the next aligned spot -- we've allocated enough + total room so that this is always possible. + */ + brk = (char *) mem2chunk (((unsigned long) (m + alignment - 1)) & + - ((signed long) alignment)); + if ((unsigned long) (brk - (char *) (p)) < MINSIZE) + brk += alignment; + + newp = (mchunkptr) brk; + leadsize = brk - (char *) (p); + newsize = chunksize (p) - leadsize; + + /* For mmapped chunks, just adjust offset */ + if (chunk_is_mmapped (p)) + { + newp->prev_size = p->prev_size + leadsize; + set_head (newp, newsize | IS_MMAPPED); + return chunk2mem (newp); + } + + /* Otherwise, give back leader, use the rest */ + set_head (newp, newsize | PREV_INUSE | + (av != &main_arena ? NON_MAIN_ARENA : 0)); + set_inuse_bit_at_offset (newp, newsize); + set_head_size (p, leadsize | (av != &main_arena ? NON_MAIN_ARENA : 0)); + _int_free (av, p, 1); + p = newp; + + assert (newsize >= nb && + (((unsigned long) (chunk2mem (p))) % alignment) == 0); } - /* Otherwise, give back leader, use the rest */ - set_head(newp, newsize | PREV_INUSE | - (av != &main_arena ? NON_MAIN_ARENA : 0)); - set_inuse_bit_at_offset(newp, newsize); - set_head_size(p, leadsize | (av != &main_arena ? NON_MAIN_ARENA : 0)); - _int_free(av, p, 1); - p = newp; - - assert (newsize >= nb && - (((unsigned long)(chunk2mem(p))) % alignment) == 0); - } - /* Also give back spare room at the end */ - if (!chunk_is_mmapped(p)) { - size = chunksize(p); - if ((unsigned long)(size) > (unsigned long)(nb + MINSIZE)) { - remainder_size = size - nb; - remainder = chunk_at_offset(p, nb); - set_head(remainder, remainder_size | PREV_INUSE | - (av != &main_arena ? NON_MAIN_ARENA : 0)); - set_head_size(p, nb); - _int_free(av, remainder, 1); + if (!chunk_is_mmapped (p)) + { + size = chunksize (p); + if ((unsigned long) (size) > (unsigned long) (nb + MINSIZE)) + { + remainder_size = size - nb; + remainder = chunk_at_offset (p, nb); + set_head (remainder, remainder_size | PREV_INUSE | + (av != &main_arena ? NON_MAIN_ARENA : 0)); + set_head_size (p, nb); + _int_free (av, remainder, 1); + } } - } - check_inuse_chunk(av, p); - return chunk2mem(p); + check_inuse_chunk (av, p); + return chunk2mem (p); } /* - ------------------------------ malloc_trim ------------------------------ -*/ + ------------------------------ malloc_trim ------------------------------ + */ -static int mtrim(mstate av, size_t pad) +static int +mtrim (mstate av, size_t pad) { /* Ensure initialization/consolidation */ malloc_consolidate (av); - const size_t ps = GLRO(dl_pagesize); + const size_t ps = GLRO (dl_pagesize); int psindex = bin_index (ps); const size_t psm1 = ps - 1; @@ -4352,42 +4480,43 @@ static int mtrim(mstate av, size_t pad) for (int i = 1; i < NBINS; ++i) if (i == 1 || i >= psindex) { - mbinptr bin = bin_at (av, i); + mbinptr bin = bin_at (av, i); - for (mchunkptr p = last (bin); p != bin; p = p->bk) - { - INTERNAL_SIZE_T size = chunksize (p); + for (mchunkptr p = last (bin); p != bin; p = p->bk) + { + INTERNAL_SIZE_T size = chunksize (p); - if (size > psm1 + sizeof (struct malloc_chunk)) - { - /* See whether the chunk contains at least one unused page. */ - char *paligned_mem = (char *) (((uintptr_t) p - + sizeof (struct malloc_chunk) - + psm1) & ~psm1); + if (size > psm1 + sizeof (struct malloc_chunk)) + { + /* See whether the chunk contains at least one unused page. */ + char *paligned_mem = (char *) (((uintptr_t) p + + sizeof (struct malloc_chunk) + + psm1) & ~psm1); - assert ((char *) chunk2mem (p) + 4 * SIZE_SZ <= paligned_mem); - assert ((char *) p + size > paligned_mem); + assert ((char *) chunk2mem (p) + 4 * SIZE_SZ <= paligned_mem); + assert ((char *) p + size > paligned_mem); - /* This is the size we could potentially free. */ - size -= paligned_mem - (char *) p; + /* This is the size we could potentially free. */ + size -= paligned_mem - (char *) p; - if (size > psm1) - { + if (size > psm1) + { #ifdef MALLOC_DEBUG - /* When debugging we simulate destroying the memory - content. */ - memset (paligned_mem, 0x89, size & ~psm1); + /* When debugging we simulate destroying the memory + content. */ + memset (paligned_mem, 0x89, size & ~psm1); #endif - __madvise (paligned_mem, size & ~psm1, MADV_DONTNEED); + __madvise (paligned_mem, size & ~psm1, MADV_DONTNEED); - result = 1; - } - } - } + result = 1; + } + } + } } #ifndef MORECORE_CANNOT_TRIM return result | (av == &main_arena ? systrim (pad, av) : 0); + #else return result; #endif @@ -4395,11 +4524,11 @@ static int mtrim(mstate av, size_t pad) int -__malloc_trim(size_t s) +__malloc_trim (size_t s) { int result = 0; - if(__malloc_initialized < 0) + if (__malloc_initialized < 0) ptmalloc_init (); mstate ar_ptr = &main_arena; @@ -4418,43 +4547,45 @@ __malloc_trim(size_t s) /* - ------------------------- malloc_usable_size ------------------------- -*/ + ------------------------- malloc_usable_size ------------------------- + */ static size_t -musable(void* mem) +musable (void *mem) { mchunkptr p; - if (mem != 0) { - p = mem2chunk(mem); - - if (__builtin_expect(using_malloc_checking == 1, 0)) - return malloc_check_get_size(p); - if (chunk_is_mmapped(p)) - return chunksize(p) - 2*SIZE_SZ; - else if (inuse(p)) - return chunksize(p) - SIZE_SZ; - } + if (mem != 0) + { + p = mem2chunk (mem); + + if (__builtin_expect (using_malloc_checking == 1, 0)) + return malloc_check_get_size (p); + + if (chunk_is_mmapped (p)) + return chunksize (p) - 2 * SIZE_SZ; + else if (inuse (p)) + return chunksize (p) - SIZE_SZ; + } return 0; } size_t -__malloc_usable_size(void* m) +__malloc_usable_size (void *m) { size_t result; - result = musable(m); + result = musable (m); return result; } /* - ------------------------------ mallinfo ------------------------------ - Accumulate malloc statistics for arena AV into M. -*/ + ------------------------------ mallinfo ------------------------------ + Accumulate malloc statistics for arena AV into M. + */ static void -int_mallinfo(mstate av, struct mallinfo *m) +int_mallinfo (mstate av, struct mallinfo *m) { size_t i; mbinptr b; @@ -4465,35 +4596,40 @@ int_mallinfo(mstate av, struct mallinfo *m) int nfastblocks; /* Ensure initialization */ - if (av->top == 0) malloc_consolidate(av); + if (av->top == 0) + malloc_consolidate (av); - check_malloc_state(av); + check_malloc_state (av); /* Account for top */ - avail = chunksize(av->top); + avail = chunksize (av->top); nblocks = 1; /* top always exists */ /* traverse fastbins */ nfastblocks = 0; fastavail = 0; - for (i = 0; i < NFASTBINS; ++i) { - for (p = fastbin (av, i); p != 0; p = p->fd) { - ++nfastblocks; - fastavail += chunksize(p); + for (i = 0; i < NFASTBINS; ++i) + { + for (p = fastbin (av, i); p != 0; p = p->fd) + { + ++nfastblocks; + fastavail += chunksize (p); + } } - } avail += fastavail; /* traverse regular bins */ - for (i = 1; i < NBINS; ++i) { - b = bin_at(av, i); - for (p = last(b); p != b; p = p->bk) { - ++nblocks; - avail += chunksize(p); + for (i = 1; i < NBINS; ++i) + { + b = bin_at (av, i); + for (p = last (b); p != b; p = p->bk) + { + ++nblocks; + avail += chunksize (p); + } } - } m->smblks += nfastblocks; m->ordblks += nblocks; @@ -4506,35 +4642,38 @@ int_mallinfo(mstate av, struct mallinfo *m) m->hblks = mp_.n_mmaps; m->hblkhd = mp_.mmapped_mem; m->usmblks = mp_.max_total_mem; - m->keepcost = chunksize(av->top); + m->keepcost = chunksize (av->top); } } -struct mallinfo __libc_mallinfo() +struct mallinfo +__libc_mallinfo () { struct mallinfo m; mstate ar_ptr; - if(__malloc_initialized < 0) + if (__malloc_initialized < 0) ptmalloc_init (); - memset(&m, 0, sizeof (m)); + memset (&m, 0, sizeof (m)); ar_ptr = &main_arena; - do { - (void)mutex_lock(&ar_ptr->mutex); - int_mallinfo(ar_ptr, &m); - (void)mutex_unlock(&ar_ptr->mutex); + do + { + (void) mutex_lock (&ar_ptr->mutex); + int_mallinfo (ar_ptr, &m); + (void) mutex_unlock (&ar_ptr->mutex); - ar_ptr = ar_ptr->next; - } while (ar_ptr != &main_arena); + ar_ptr = ar_ptr->next; + } + while (ar_ptr != &main_arena); return m; } /* - ------------------------------ malloc_stats ------------------------------ -*/ + ------------------------------ malloc_stats ------------------------------ + */ void __malloc_stats (void) @@ -4546,48 +4685,50 @@ __malloc_stats (void) long stat_lock_direct = 0, stat_lock_loop = 0, stat_lock_wait = 0; #endif - if(__malloc_initialized < 0) + if (__malloc_initialized < 0) ptmalloc_init (); _IO_flockfile (stderr); int old_flags2 = ((_IO_FILE *) stderr)->_flags2; ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; - for (i=0, ar_ptr = &main_arena;; i++) { - struct mallinfo mi; - - memset(&mi, 0, sizeof(mi)); - (void)mutex_lock(&ar_ptr->mutex); - int_mallinfo(ar_ptr, &mi); - fprintf(stderr, "Arena %d:\n", i); - fprintf(stderr, "system bytes = %10u\n", (unsigned int)mi.arena); - fprintf(stderr, "in use bytes = %10u\n", (unsigned int)mi.uordblks); + for (i = 0, ar_ptr = &main_arena;; i++) + { + struct mallinfo mi; + + memset (&mi, 0, sizeof (mi)); + (void) mutex_lock (&ar_ptr->mutex); + int_mallinfo (ar_ptr, &mi); + fprintf (stderr, "Arena %d:\n", i); + fprintf (stderr, "system bytes = %10u\n", (unsigned int) mi.arena); + fprintf (stderr, "in use bytes = %10u\n", (unsigned int) mi.uordblks); #if MALLOC_DEBUG > 1 - if (i > 0) - dump_heap(heap_for_ptr(top(ar_ptr))); + if (i > 0) + dump_heap (heap_for_ptr (top (ar_ptr))); #endif - system_b += mi.arena; - in_use_b += mi.uordblks; + system_b += mi.arena; + in_use_b += mi.uordblks; #if THREAD_STATS - stat_lock_direct += ar_ptr->stat_lock_direct; - stat_lock_loop += ar_ptr->stat_lock_loop; - stat_lock_wait += ar_ptr->stat_lock_wait; + stat_lock_direct += ar_ptr->stat_lock_direct; + stat_lock_loop += ar_ptr->stat_lock_loop; + stat_lock_wait += ar_ptr->stat_lock_wait; #endif - (void)mutex_unlock(&ar_ptr->mutex); - ar_ptr = ar_ptr->next; - if(ar_ptr == &main_arena) break; - } - fprintf(stderr, "Total (incl. mmap):\n"); - fprintf(stderr, "system bytes = %10u\n", system_b); - fprintf(stderr, "in use bytes = %10u\n", in_use_b); - fprintf(stderr, "max mmap regions = %10u\n", (unsigned int)mp_.max_n_mmaps); - fprintf(stderr, "max mmap bytes = %10lu\n", - (unsigned long)mp_.max_mmapped_mem); + (void) mutex_unlock (&ar_ptr->mutex); + ar_ptr = ar_ptr->next; + if (ar_ptr == &main_arena) + break; + } + fprintf (stderr, "Total (incl. mmap):\n"); + fprintf (stderr, "system bytes = %10u\n", system_b); + fprintf (stderr, "in use bytes = %10u\n", in_use_b); + fprintf (stderr, "max mmap regions = %10u\n", (unsigned int) mp_.max_n_mmaps); + fprintf (stderr, "max mmap bytes = %10lu\n", + (unsigned long) mp_.max_mmapped_mem); #if THREAD_STATS - fprintf(stderr, "heaps created = %10d\n", stat_n_heaps); - fprintf(stderr, "locked directly = %10ld\n", stat_lock_direct); - fprintf(stderr, "locked in loop = %10ld\n", stat_lock_loop); - fprintf(stderr, "locked waiting = %10ld\n", stat_lock_wait); - fprintf(stderr, "locked total = %10ld\n", - stat_lock_direct + stat_lock_loop + stat_lock_wait); + fprintf (stderr, "heaps created = %10d\n", stat_n_heaps); + fprintf (stderr, "locked directly = %10ld\n", stat_lock_direct); + fprintf (stderr, "locked in loop = %10ld\n", stat_lock_loop); + fprintf (stderr, "locked waiting = %10ld\n", stat_lock_wait); + fprintf (stderr, "locked total = %10ld\n", + stat_lock_direct + stat_lock_loop + stat_lock_wait); #endif ((_IO_FILE *) stderr)->_flags2 |= old_flags2; _IO_funlockfile (stderr); @@ -4595,201 +4736,203 @@ __malloc_stats (void) /* - ------------------------------ mallopt ------------------------------ -*/ + ------------------------------ mallopt ------------------------------ + */ -int __libc_mallopt(int param_number, int value) +int +__libc_mallopt (int param_number, int value) { mstate av = &main_arena; int res = 1; - if(__malloc_initialized < 0) + if (__malloc_initialized < 0) ptmalloc_init (); - (void)mutex_lock(&av->mutex); + (void) mutex_lock (&av->mutex); /* Ensure initialization/consolidation */ - malloc_consolidate(av); + malloc_consolidate (av); LIBC_PROBE (memory_mallopt, 2, param_number, value); - switch(param_number) { - case M_MXFAST: - if (value >= 0 && value <= MAX_FAST_SIZE) - { - LIBC_PROBE (memory_mallopt_mxfast, 2, value, get_max_fast ()); - set_max_fast(value); - } - else - res = 0; - break; - - case M_TRIM_THRESHOLD: - LIBC_PROBE (memory_mallopt_trim_threshold, 3, value, - mp_.trim_threshold, mp_.no_dyn_threshold); - mp_.trim_threshold = value; - mp_.no_dyn_threshold = 1; - break; - - case M_TOP_PAD: - LIBC_PROBE (memory_mallopt_top_pad, 3, value, - mp_.top_pad, mp_.no_dyn_threshold); - mp_.top_pad = value; - mp_.no_dyn_threshold = 1; - break; - - case M_MMAP_THRESHOLD: - /* Forbid setting the threshold too high. */ - if((unsigned long)value > HEAP_MAX_SIZE/2) - res = 0; - else - { - LIBC_PROBE (memory_mallopt_mmap_threshold, 3, value, - mp_.mmap_threshold, mp_.no_dyn_threshold); - mp_.mmap_threshold = value; - mp_.no_dyn_threshold = 1; - } - break; - - case M_MMAP_MAX: - LIBC_PROBE (memory_mallopt_mmap_max, 3, value, - mp_.n_mmaps_max, mp_.no_dyn_threshold); - mp_.n_mmaps_max = value; - mp_.no_dyn_threshold = 1; - break; - - case M_CHECK_ACTION: - LIBC_PROBE (memory_mallopt_check_action, 2, value, check_action); - check_action = value; - break; - - case M_PERTURB: - LIBC_PROBE (memory_mallopt_perturb, 2, value, perturb_byte); - perturb_byte = value; - break; - - case M_ARENA_TEST: - if (value > 0) - { - LIBC_PROBE (memory_mallopt_arena_test, 2, value, mp_.arena_test); - mp_.arena_test = value; - } - break; - - case M_ARENA_MAX: - if (value > 0) - { - LIBC_PROBE (memory_mallopt_arena_max, 2, value, mp_.arena_max); - mp_.arena_max = value; - } - break; - } - (void)mutex_unlock(&av->mutex); + switch (param_number) + { + case M_MXFAST: + if (value >= 0 && value <= MAX_FAST_SIZE) + { + LIBC_PROBE (memory_mallopt_mxfast, 2, value, get_max_fast ()); + set_max_fast (value); + } + else + res = 0; + break; + + case M_TRIM_THRESHOLD: + LIBC_PROBE (memory_mallopt_trim_threshold, 3, value, + mp_.trim_threshold, mp_.no_dyn_threshold); + mp_.trim_threshold = value; + mp_.no_dyn_threshold = 1; + break; + + case M_TOP_PAD: + LIBC_PROBE (memory_mallopt_top_pad, 3, value, + mp_.top_pad, mp_.no_dyn_threshold); + mp_.top_pad = value; + mp_.no_dyn_threshold = 1; + break; + + case M_MMAP_THRESHOLD: + /* Forbid setting the threshold too high. */ + if ((unsigned long) value > HEAP_MAX_SIZE / 2) + res = 0; + else + { + LIBC_PROBE (memory_mallopt_mmap_threshold, 3, value, + mp_.mmap_threshold, mp_.no_dyn_threshold); + mp_.mmap_threshold = value; + mp_.no_dyn_threshold = 1; + } + break; + + case M_MMAP_MAX: + LIBC_PROBE (memory_mallopt_mmap_max, 3, value, + mp_.n_mmaps_max, mp_.no_dyn_threshold); + mp_.n_mmaps_max = value; + mp_.no_dyn_threshold = 1; + break; + + case M_CHECK_ACTION: + LIBC_PROBE (memory_mallopt_check_action, 2, value, check_action); + check_action = value; + break; + + case M_PERTURB: + LIBC_PROBE (memory_mallopt_perturb, 2, value, perturb_byte); + perturb_byte = value; + break; + + case M_ARENA_TEST: + if (value > 0) + { + LIBC_PROBE (memory_mallopt_arena_test, 2, value, mp_.arena_test); + mp_.arena_test = value; + } + break; + + case M_ARENA_MAX: + if (value > 0) + { + LIBC_PROBE (memory_mallopt_arena_max, 2, value, mp_.arena_max); + mp_.arena_max = value; + } + break; + } + (void) mutex_unlock (&av->mutex); return res; } libc_hidden_def (__libc_mallopt) /* - -------------------- Alternative MORECORE functions -------------------- -*/ + -------------------- Alternative MORECORE functions -------------------- + */ /* - General Requirements for MORECORE. + General Requirements for MORECORE. - The MORECORE function must have the following properties: + The MORECORE function must have the following properties: - If MORECORE_CONTIGUOUS is false: + If MORECORE_CONTIGUOUS is false: - * MORECORE must allocate in multiples of pagesize. It will + * MORECORE must allocate in multiples of pagesize. It will only be called with arguments that are multiples of pagesize. - * MORECORE(0) must return an address that is at least + * MORECORE(0) must return an address that is at least MALLOC_ALIGNMENT aligned. (Page-aligning always suffices.) - else (i.e. If MORECORE_CONTIGUOUS is true): + else (i.e. If MORECORE_CONTIGUOUS is true): - * Consecutive calls to MORECORE with positive arguments + * Consecutive calls to MORECORE with positive arguments return increasing addresses, indicating that space has been contiguously extended. - * MORECORE need not allocate in multiples of pagesize. + * MORECORE need not allocate in multiples of pagesize. Calls to MORECORE need not have args of multiples of pagesize. - * MORECORE need not page-align. + * MORECORE need not page-align. - In either case: + In either case: - * MORECORE may allocate more memory than requested. (Or even less, + * MORECORE may allocate more memory than requested. (Or even less, but this will generally result in a malloc failure.) - * MORECORE must not allocate memory when given argument zero, but + * MORECORE must not allocate memory when given argument zero, but instead return one past the end address of memory from previous nonzero call. This malloc does NOT call MORECORE(0) until at least one call with positive arguments is made, so the initial value returned is not important. - * Even though consecutive calls to MORECORE need not return contiguous + * Even though consecutive calls to MORECORE need not return contiguous addresses, it must be OK for malloc'ed chunks to span multiple regions in those cases where they do happen to be contiguous. - * MORECORE need not handle negative arguments -- it may instead + * MORECORE need not handle negative arguments -- it may instead just return MORECORE_FAILURE when given negative arguments. Negative arguments are always multiples of pagesize. MORECORE must not misinterpret negative args as large positive unsigned args. You can suppress all such calls from even occurring by defining MORECORE_CANNOT_TRIM, - There is some variation across systems about the type of the - argument to sbrk/MORECORE. If size_t is unsigned, then it cannot - actually be size_t, because sbrk supports negative args, so it is - normally the signed type of the same width as size_t (sometimes - declared as "intptr_t", and sometimes "ptrdiff_t"). It doesn't much - matter though. Internally, we use "long" as arguments, which should - work across all reasonable possibilities. - - Additionally, if MORECORE ever returns failure for a positive - request, then mmap is used as a noncontiguous system allocator. This - is a useful backup strategy for systems with holes in address spaces - -- in this case sbrk cannot contiguously expand the heap, but mmap - may be able to map noncontiguous space. - - If you'd like mmap to ALWAYS be used, you can define MORECORE to be - a function that always returns MORECORE_FAILURE. - - If you are using this malloc with something other than sbrk (or its - emulation) to supply memory regions, you probably want to set - MORECORE_CONTIGUOUS as false. As an example, here is a custom - allocator kindly contributed for pre-OSX macOS. It uses virtually - but not necessarily physically contiguous non-paged memory (locked - in, present and won't get swapped out). You can use it by - uncommenting this section, adding some #includes, and setting up the - appropriate defines above: - - #define MORECORE osMoreCore - #define MORECORE_CONTIGUOUS 0 - - There is also a shutdown routine that should somehow be called for - cleanup upon program exit. - - #define MAX_POOL_ENTRIES 100 - #define MINIMUM_MORECORE_SIZE (64 * 1024) - static int next_os_pool; - void *our_os_pools[MAX_POOL_ENTRIES]; - - void *osMoreCore(int size) - { + There is some variation across systems about the type of the + argument to sbrk/MORECORE. If size_t is unsigned, then it cannot + actually be size_t, because sbrk supports negative args, so it is + normally the signed type of the same width as size_t (sometimes + declared as "intptr_t", and sometimes "ptrdiff_t"). It doesn't much + matter though. Internally, we use "long" as arguments, which should + work across all reasonable possibilities. + + Additionally, if MORECORE ever returns failure for a positive + request, then mmap is used as a noncontiguous system allocator. This + is a useful backup strategy for systems with holes in address spaces + -- in this case sbrk cannot contiguously expand the heap, but mmap + may be able to map noncontiguous space. + + If you'd like mmap to ALWAYS be used, you can define MORECORE to be + a function that always returns MORECORE_FAILURE. + + If you are using this malloc with something other than sbrk (or its + emulation) to supply memory regions, you probably want to set + MORECORE_CONTIGUOUS as false. As an example, here is a custom + allocator kindly contributed for pre-OSX macOS. It uses virtually + but not necessarily physically contiguous non-paged memory (locked + in, present and won't get swapped out). You can use it by + uncommenting this section, adding some #includes, and setting up the + appropriate defines above: + + *#define MORECORE osMoreCore + *#define MORECORE_CONTIGUOUS 0 + + There is also a shutdown routine that should somehow be called for + cleanup upon program exit. + + *#define MAX_POOL_ENTRIES 100 + *#define MINIMUM_MORECORE_SIZE (64 * 1024) + static int next_os_pool; + void *our_os_pools[MAX_POOL_ENTRIES]; + + void *osMoreCore(int size) + { void *ptr = 0; static void *sbrk_top = 0; if (size > 0) { if (size < MINIMUM_MORECORE_SIZE) - size = MINIMUM_MORECORE_SIZE; + size = MINIMUM_MORECORE_SIZE; if (CurrentExecutionLevel() == kTaskLevel) - ptr = PoolAllocateResident(size + RM_PAGE_SIZE, 0); + ptr = PoolAllocateResident(size + RM_PAGE_SIZE, 0); if (ptr == 0) { - return (void *) MORECORE_FAILURE; + return (void *) MORECORE_FAILURE; } // save ptrs so they can be freed during cleanup our_os_pools[next_os_pool] = ptr; @@ -4807,24 +4950,24 @@ libc_hidden_def (__libc_mallopt) { return sbrk_top; } - } + } - // cleanup any allocated memory pools - // called as last thing before shutting down driver + // cleanup any allocated memory pools + // called as last thing before shutting down driver - void osCleanupMem(void) - { + void osCleanupMem(void) + { void **ptr; for (ptr = our_os_pools; ptr < &our_os_pools[MAX_POOL_ENTRIES]; ptr++) if (*ptr) { - PoolDeallocate(*ptr); - *ptr = 0; + PoolDeallocate(*ptr); + * ptr = 0; } - } + } -*/ + */ /* Helper code. */ @@ -4832,7 +4975,7 @@ libc_hidden_def (__libc_mallopt) extern char **__libc_argv attribute_hidden; static void -malloc_printerr(int action, const char *str, void *ptr) +malloc_printerr (int action, const char *str, void *ptr) { if ((action & 5) == 5) __libc_message (action & 2, "%s\n", str); @@ -4843,10 +4986,10 @@ malloc_printerr(int action, const char *str, void *ptr) buf[sizeof (buf) - 1] = '\0'; char *cp = _itoa_word ((uintptr_t) ptr, &buf[sizeof (buf) - 1], 16, 0); while (cp > buf) - *--cp = '0'; + *--cp = '0'; __libc_message (action & 2, "*** Error in `%s': %s: 0x%s ***\n", - __libc_argv[0] ?: "<unknown>", str, cp); + __libc_argv[0] ? : "<unknown>", str, cp); } else if (action & 2) abort (); @@ -4869,10 +5012,11 @@ __posix_memalign (void **memptr, size_t alignment, size_t size) void *address = RETURN_ADDRESS (0); mem = _mid_memalign (alignment, size, address); - if (mem != NULL) { - *memptr = mem; - return 0; - } + if (mem != NULL) + { + *memptr = mem; + return 0; + } return ENOMEM; } @@ -4896,7 +5040,8 @@ malloc_info (int options, FILE *fp) size_t total_aspace = 0; size_t total_aspace_mprotect = 0; - void mi_arena (mstate ar_ptr) + void + mi_arena (mstate ar_ptr) { fprintf (fp, "<heap nr=\"%d\">\n<sizes>\n", n++); @@ -4917,28 +5062,28 @@ malloc_info (int options, FILE *fp) for (size_t i = 0; i < NFASTBINS; ++i) { - mchunkptr p = fastbin (ar_ptr, i); - if (p != NULL) - { - size_t nthissize = 0; - size_t thissize = chunksize (p); - - while (p != NULL) - { - ++nthissize; - p = p->fd; - } - - fastavail += nthissize * thissize; - nfastblocks += nthissize; - sizes[i].from = thissize - (MALLOC_ALIGNMENT - 1); - sizes[i].to = thissize; - sizes[i].count = nthissize; - } - else - sizes[i].from = sizes[i].to = sizes[i].count = 0; - - sizes[i].total = sizes[i].count * sizes[i].to; + mchunkptr p = fastbin (ar_ptr, i); + if (p != NULL) + { + size_t nthissize = 0; + size_t thissize = chunksize (p); + + while (p != NULL) + { + ++nthissize; + p = p->fd; + } + + fastavail += nthissize * thissize; + nfastblocks += nthissize; + sizes[i].from = thissize - (MALLOC_ALIGNMENT - 1); + sizes[i].to = thissize; + sizes[i].count = nthissize; + } + else + sizes[i].from = sizes[i].to = sizes[i].count = 0; + + sizes[i].total = sizes[i].count * sizes[i].to; } @@ -4947,29 +5092,29 @@ malloc_info (int options, FILE *fp) for (size_t i = 1; i < NBINS; ++i) { - bin = bin_at (ar_ptr, i); - r = bin->fd; - sizes[NFASTBINS - 1 + i].from = ~((size_t) 0); - sizes[NFASTBINS - 1 + i].to = sizes[NFASTBINS - 1 + i].total - = sizes[NFASTBINS - 1 + i].count = 0; - - if (r != NULL) - while (r != bin) - { - ++sizes[NFASTBINS - 1 + i].count; - sizes[NFASTBINS - 1 + i].total += r->size; - sizes[NFASTBINS - 1 + i].from - = MIN (sizes[NFASTBINS - 1 + i].from, r->size); - sizes[NFASTBINS - 1 + i].to = MAX (sizes[NFASTBINS - 1 + i].to, - r->size); - - r = r->fd; - } - - if (sizes[NFASTBINS - 1 + i].count == 0) - sizes[NFASTBINS - 1 + i].from = 0; - nblocks += sizes[NFASTBINS - 1 + i].count; - avail += sizes[NFASTBINS - 1 + i].total; + bin = bin_at (ar_ptr, i); + r = bin->fd; + sizes[NFASTBINS - 1 + i].from = ~((size_t) 0); + sizes[NFASTBINS - 1 + i].to = sizes[NFASTBINS - 1 + i].total + = sizes[NFASTBINS - 1 + i].count = 0; + + if (r != NULL) + while (r != bin) + { + ++sizes[NFASTBINS - 1 + i].count; + sizes[NFASTBINS - 1 + i].total += r->size; + sizes[NFASTBINS - 1 + i].from + = MIN (sizes[NFASTBINS - 1 + i].from, r->size); + sizes[NFASTBINS - 1 + i].to = MAX (sizes[NFASTBINS - 1 + i].to, + r->size); + + r = r->fd; + } + + if (sizes[NFASTBINS - 1 + i].count == 0) + sizes[NFASTBINS - 1 + i].from = 0; + nblocks += sizes[NFASTBINS - 1 + i].count; + avail += sizes[NFASTBINS - 1 + i].total; } mutex_unlock (&ar_ptr->mutex); @@ -4982,51 +5127,51 @@ malloc_info (int options, FILE *fp) for (size_t i = 0; i < nsizes; ++i) if (sizes[i].count != 0 && i != NFASTBINS) - fprintf (fp, "\ + fprintf (fp, " \ <size from=\"%zu\" to=\"%zu\" total=\"%zu\" count=\"%zu\"/>\n", - sizes[i].from, sizes[i].to, sizes[i].total, sizes[i].count); + sizes[i].from, sizes[i].to, sizes[i].total, sizes[i].count); if (sizes[NFASTBINS].count != 0) fprintf (fp, "\ <unsorted from=\"%zu\" to=\"%zu\" total=\"%zu\" count=\"%zu\"/>\n", - sizes[NFASTBINS].from, sizes[NFASTBINS].to, - sizes[NFASTBINS].total, sizes[NFASTBINS].count); + sizes[NFASTBINS].from, sizes[NFASTBINS].to, + sizes[NFASTBINS].total, sizes[NFASTBINS].count); total_system += ar_ptr->system_mem; total_max_system += ar_ptr->max_system_mem; fprintf (fp, - "</sizes>\n<total type=\"fast\" count=\"%zu\" size=\"%zu\"/>\n" - "<total type=\"rest\" count=\"%zu\" size=\"%zu\"/>\n" - "<system type=\"current\" size=\"%zu\"/>\n" - "<system type=\"max\" size=\"%zu\"/>\n", - nfastblocks, fastavail, nblocks, avail, - ar_ptr->system_mem, ar_ptr->max_system_mem); + "</sizes>\n<total type=\"fast\" count=\"%zu\" size=\"%zu\"/>\n" + "<total type=\"rest\" count=\"%zu\" size=\"%zu\"/>\n" + "<system type=\"current\" size=\"%zu\"/>\n" + "<system type=\"max\" size=\"%zu\"/>\n", + nfastblocks, fastavail, nblocks, avail, + ar_ptr->system_mem, ar_ptr->max_system_mem); if (ar_ptr != &main_arena) { - heap_info *heap = heap_for_ptr(top(ar_ptr)); - fprintf (fp, - "<aspace type=\"total\" size=\"%zu\"/>\n" - "<aspace type=\"mprotect\" size=\"%zu\"/>\n", - heap->size, heap->mprotect_size); - total_aspace += heap->size; - total_aspace_mprotect += heap->mprotect_size; + heap_info *heap = heap_for_ptr (top (ar_ptr)); + fprintf (fp, + "<aspace type=\"total\" size=\"%zu\"/>\n" + "<aspace type=\"mprotect\" size=\"%zu\"/>\n", + heap->size, heap->mprotect_size); + total_aspace += heap->size; + total_aspace_mprotect += heap->mprotect_size; } else { - fprintf (fp, - "<aspace type=\"total\" size=\"%zu\"/>\n" - "<aspace type=\"mprotect\" size=\"%zu\"/>\n", - ar_ptr->system_mem, ar_ptr->system_mem); - total_aspace += ar_ptr->system_mem; - total_aspace_mprotect += ar_ptr->system_mem; + fprintf (fp, + "<aspace type=\"total\" size=\"%zu\"/>\n" + "<aspace type=\"mprotect\" size=\"%zu\"/>\n", + ar_ptr->system_mem, ar_ptr->system_mem); + total_aspace += ar_ptr->system_mem; + total_aspace_mprotect += ar_ptr->system_mem; } fputs ("</heap>\n", fp); } - if(__malloc_initialized < 0) + if (__malloc_initialized < 0) ptmalloc_init (); fputs ("<malloc version=\"1\">\n", fp); @@ -5041,16 +5186,16 @@ malloc_info (int options, FILE *fp) while (ar_ptr != &main_arena); fprintf (fp, - "<total type=\"fast\" count=\"%zu\" size=\"%zu\"/>\n" - "<total type=\"rest\" count=\"%zu\" size=\"%zu\"/>\n" - "<system type=\"current\" size=\"%zu\"/>\n" - "<system type=\"max\" size=\"%zu\"/>\n" - "<aspace type=\"total\" size=\"%zu\"/>\n" - "<aspace type=\"mprotect\" size=\"%zu\"/>\n" - "</malloc>\n", - total_nfastblocks, total_fastavail, total_nblocks, total_avail, - total_system, total_max_system, - total_aspace, total_aspace_mprotect); + "<total type=\"fast\" count=\"%zu\" size=\"%zu\"/>\n" + "<total type=\"rest\" count=\"%zu\" size=\"%zu\"/>\n" + "<system type=\"current\" size=\"%zu\"/>\n" + "<system type=\"max\" size=\"%zu\"/>\n" + "<aspace type=\"total\" size=\"%zu\"/>\n" + "<aspace type=\"mprotect\" size=\"%zu\"/>\n" + "</malloc>\n", + total_nfastblocks, total_fastavail, total_nblocks, total_avail, + total_system, total_max_system, + total_aspace, total_aspace_mprotect); return 0; } @@ -5077,11 +5222,11 @@ weak_alias (__malloc_set_state, malloc_set_state) /* ------------------------------------------------------------ -History: + History: -[see ftp://g.oswego.edu/pub/misc/malloc.c for the history of dlmalloc] + [see ftp://g.oswego.edu/pub/misc/malloc.c for the history of dlmalloc] -*/ + */ /* * Local variables: * c-basic-offset: 2 diff --git a/malloc/malloc.h b/malloc/malloc.h index 294cae4..30bb91a 100644 --- a/malloc/malloc.h +++ b/malloc/malloc.h @@ -39,7 +39,7 @@ extern void *malloc (size_t __size) __THROW __attribute_malloc__ __wur; /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */ extern void *calloc (size_t __nmemb, size_t __size) - __THROW __attribute_malloc__ __wur; +__THROW __attribute_malloc__ __wur; /* Re-allocate the previously allocated block in __ptr, making the new block SIZE bytes long. */ @@ -47,7 +47,7 @@ extern void *calloc (size_t __nmemb, size_t __size) the same pointer that was passed to it, aliasing needs to be allowed between objects pointed by the old and new pointers. */ extern void *realloc (void *__ptr, size_t __size) - __THROW __attribute_warn_unused_result__; +__THROW __attribute_warn_unused_result__; /* Free a block allocated by `malloc', `realloc' or `calloc'. */ extern void free (void *__ptr) __THROW; @@ -57,14 +57,14 @@ extern void cfree (void *__ptr) __THROW; /* Allocate SIZE bytes allocated to ALIGNMENT bytes. */ extern void *memalign (size_t __alignment, size_t __size) - __THROW __attribute_malloc__ __wur; +__THROW __attribute_malloc__ __wur; /* Allocate SIZE bytes on a page boundary. */ extern void *valloc (size_t __size) __THROW __attribute_malloc__ __wur; /* Equivalent to valloc(minimum-page-that-holds(n)), that is, round up __size to nearest pagesize. */ -extern void * pvalloc (size_t __size) __THROW __attribute_malloc__ __wur; +extern void *pvalloc (size_t __size) __THROW __attribute_malloc__ __wur; /* Underlying allocation function; successive calls should return contiguous pieces of memory. */ @@ -72,7 +72,7 @@ extern void *(*__morecore) (ptrdiff_t __size); /* Default value of `__morecore'. */ extern void *__default_morecore (ptrdiff_t __size) - __THROW __attribute_malloc__; +__THROW __attribute_malloc__; /* SVID2/XPG mallinfo structure */ @@ -95,16 +95,16 @@ extern struct mallinfo mallinfo (void) __THROW; /* SVID2/XPG mallopt options */ #ifndef M_MXFAST -# define M_MXFAST 1 /* maximum request size for "fastbins" */ +# define M_MXFAST 1 /* maximum request size for "fastbins" */ #endif #ifndef M_NLBLKS -# define M_NLBLKS 2 /* UNUSED in this malloc */ +# define M_NLBLKS 2 /* UNUSED in this malloc */ #endif #ifndef M_GRAIN -# define M_GRAIN 3 /* UNUSED in this malloc */ +# define M_GRAIN 3 /* UNUSED in this malloc */ #endif #ifndef M_KEEP -# define M_KEEP 4 /* UNUSED in this malloc */ +# define M_KEEP 4 /* UNUSED in this malloc */ #endif /* mallopt options that actually do something */ @@ -113,9 +113,9 @@ extern struct mallinfo mallinfo (void) __THROW; #define M_MMAP_THRESHOLD -3 #define M_MMAP_MAX -4 #define M_CHECK_ACTION -5 -#define M_PERTURB -6 -#define M_ARENA_TEST -7 -#define M_ARENA_MAX -8 +#define M_PERTURB -6 +#define M_ARENA_TEST -7 +#define M_ARENA_MAX -8 /* General SVID/XPG interface to tunable parameters. */ extern int mallopt (int __param, int __val) __THROW; @@ -145,22 +145,22 @@ extern int malloc_set_state (void *__ptr) __THROW; the application provides the preferred way to set up the hook pointers. */ extern void (*__MALLOC_HOOK_VOLATILE __malloc_initialize_hook) (void) - __MALLOC_DEPRECATED; +__MALLOC_DEPRECATED; /* Hooks for debugging and user-defined versions. */ extern void (*__MALLOC_HOOK_VOLATILE __free_hook) (void *__ptr, - const void *) - __MALLOC_DEPRECATED; -extern void *(*__MALLOC_HOOK_VOLATILE __malloc_hook) (size_t __size, - const void *) - __MALLOC_DEPRECATED; -extern void *(*__MALLOC_HOOK_VOLATILE __realloc_hook) (void *__ptr, - size_t __size, - const void *) - __MALLOC_DEPRECATED; -extern void *(*__MALLOC_HOOK_VOLATILE __memalign_hook) (size_t __alignment, - size_t __size, - const void *) - __MALLOC_DEPRECATED; + const void *) +__MALLOC_DEPRECATED; +extern void *(*__MALLOC_HOOK_VOLATILE __malloc_hook)(size_t __size, + const void *) +__MALLOC_DEPRECATED; +extern void *(*__MALLOC_HOOK_VOLATILE __realloc_hook)(void *__ptr, + size_t __size, + const void *) +__MALLOC_DEPRECATED; +extern void *(*__MALLOC_HOOK_VOLATILE __memalign_hook)(size_t __alignment, + size_t __size, + const void *) +__MALLOC_DEPRECATED; extern void (*__MALLOC_HOOK_VOLATILE __after_morecore_hook) (void); /* Activate a standard set of debugging hooks. */ @@ -168,5 +168,4 @@ extern void __malloc_check_init (void) __THROW __MALLOC_DEPRECATED; __END_DECLS - #endif /* malloc.h */ diff --git a/malloc/mallocbug.c b/malloc/mallocbug.c index fc607ae..7d19b6f 100644 --- a/malloc/mallocbug.c +++ b/malloc/mallocbug.c @@ -22,14 +22,14 @@ main (int argc, char *argv[]) size_t i; /* Here's what memory is supposed to look like (hex): - size contents - 3000 original_info_table, later fill_info_table1 + size contents + 3000 original_info_table, later fill_info_table1 3fa000 dummy0 3fa000 dummy1 - 6000 info_table_2 - 3000 over_top + 6000 info_table_2 + 3000 over_top - */ + */ /* mem: original_info_table */ dummy0 = malloc (0x3fa000); /* mem: original_info_table, dummy0 */ @@ -54,15 +54,15 @@ main (int argc, char *argv[]) for (i = 0; i < over_top_size; ++i) if (over_top[i] != 0) { - printf ("FAIL: malloc expands info table\n"); - return 0; + printf ("FAIL: malloc expands info table\n"); + return 0; } for (i = 0; i < over_top_dup_size; ++i) if (over_top_dup[i] != 1) { - printf ("FAIL: malloc expands info table\n"); - return 0; + printf ("FAIL: malloc expands info table\n"); + return 0; } printf ("PASS: malloc expands info table\n"); diff --git a/malloc/mcheck.c b/malloc/mcheck.c index 87f8acd..f4f875e 100644 --- a/malloc/mcheck.c +++ b/malloc/mcheck.c @@ -17,7 +17,7 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ -#ifndef _MALLOC_INTERNAL +#ifndef _MALLOC_INTERNAL # define _MALLOC_INTERNAL # include <malloc.h> # include <mcheck.h> @@ -28,32 +28,32 @@ #endif /* Old hook values. */ -static void (*old_free_hook) (__ptr_t ptr, const __ptr_t); +static void (*old_free_hook)(__ptr_t ptr, const __ptr_t); static __ptr_t (*old_malloc_hook) (size_t size, const __ptr_t); static __ptr_t (*old_memalign_hook) (size_t alignment, size_t size, - const __ptr_t); + const __ptr_t); static __ptr_t (*old_realloc_hook) (__ptr_t ptr, size_t size, - const __ptr_t); + const __ptr_t); /* Function to call when something awful happens. */ static void (*abortfunc) (enum mcheck_status); /* Arbitrary magical numbers. */ -#define MAGICWORD 0xfedabeeb -#define MAGICFREE 0xd8675309 -#define MAGICBYTE ((char) 0xd7) -#define MALLOCFLOOD ((char) 0x93) -#define FREEFLOOD ((char) 0x95) +#define MAGICWORD 0xfedabeeb +#define MAGICFREE 0xd8675309 +#define MAGICBYTE ((char) 0xd7) +#define MALLOCFLOOD ((char) 0x93) +#define FREEFLOOD ((char) 0x95) struct hdr - { - size_t size; /* Exact size requested by user. */ - unsigned long int magic; /* Magic number to check header integrity. */ - struct hdr *prev; - struct hdr *next; - __ptr_t block; /* Real block allocated, for memalign. */ - unsigned long int magic2; /* Extra, keeps us doubleword aligned. */ - }; +{ + size_t size; /* Exact size requested by user. */ + unsigned long int magic; /* Magic number to check header integrity. */ + struct hdr *prev; + struct hdr *next; + __ptr_t block; /* Real block allocated, for memalign. */ + unsigned long int magic2; /* Extra, keeps us doubleword aligned. */ +}; /* This is the beginning of the list of all memory blocks allocated. It is only constructed if the pedantic testing is requested. */ @@ -69,11 +69,10 @@ static int pedantic; # define flood memset #else static void flood (__ptr_t, int, size_t); -static void -flood (ptr, val, size) - __ptr_t ptr; - int val; - size_t size; +static void flood (ptr, val, size) +__ptr_t ptr; +int val; +size_t size; { char *cp = ptr; while (size--) @@ -101,11 +100,11 @@ checkhdr (const struct hdr *hdr) break; case MAGICWORD: if (((char *) &hdr[1])[hdr->size] != MAGICBYTE) - status = MCHECK_TAIL; + status = MCHECK_TAIL; else if ((hdr->magic2 ^ (uintptr_t) hdr->block) != MAGICWORD) - status = MCHECK_HEAD; + status = MCHECK_HEAD; else - status = MCHECK_OK; + status = MCHECK_OK; break; } if (status != MCHECK_OK) @@ -148,13 +147,13 @@ unlink_blk (struct hdr *ptr) { ptr->next->prev = ptr->prev; ptr->next->magic = MAGICWORD ^ ((uintptr_t) ptr->next->prev - + (uintptr_t) ptr->next->next); + + (uintptr_t) ptr->next->next); } if (ptr->prev != NULL) { ptr->prev->next = ptr->next; ptr->prev->magic = MAGICWORD ^ ((uintptr_t) ptr->prev->prev - + (uintptr_t) ptr->prev->next); + + (uintptr_t) ptr->prev->next); } else root = ptr->next; @@ -173,7 +172,7 @@ link_blk (struct hdr *hdr) { hdr->next->prev = hdr; hdr->next->magic = MAGICWORD ^ ((uintptr_t) hdr - + (uintptr_t) hdr->next->next); + + (uintptr_t) hdr->next->next); } } static void @@ -194,7 +193,7 @@ freehook (__ptr_t ptr, const __ptr_t caller) } __free_hook = old_free_hook; if (old_free_hook != NULL) - (*old_free_hook) (ptr, caller); + (*old_free_hook)(ptr, caller); else free (ptr); __free_hook = freehook; @@ -216,8 +215,8 @@ mallochook (size_t size, const __ptr_t caller) __malloc_hook = old_malloc_hook; if (old_malloc_hook != NULL) - hdr = (struct hdr *) (*old_malloc_hook) (sizeof (struct hdr) + size + 1, - caller); + hdr = (struct hdr *) (*old_malloc_hook)(sizeof (struct hdr) + size + 1, + caller); else hdr = (struct hdr *) malloc (sizeof (struct hdr) + size + 1); __malloc_hook = mallochook; @@ -235,7 +234,7 @@ mallochook (size_t size, const __ptr_t caller) static __ptr_t memalignhook (size_t alignment, size_t size, - const __ptr_t caller) + const __ptr_t caller) { struct hdr *hdr; size_t slop; @@ -244,7 +243,7 @@ memalignhook (size_t alignment, size_t size, if (pedantic) mcheck_check_all (); - slop = (sizeof *hdr + alignment - 1) & -alignment; + slop = (sizeof *hdr + alignment - 1) & - alignment; if (size > ~((size_t) 0) - (slop + 1)) { @@ -254,7 +253,7 @@ memalignhook (size_t alignment, size_t size, __memalign_hook = old_memalign_hook; if (old_memalign_hook != NULL) - block = (*old_memalign_hook) (alignment, slop + size + 1, caller); + block = (*old_memalign_hook)(alignment, slop + size + 1, caller); else block = memalign (alignment, slop + size + 1); __memalign_hook = memalignhook; @@ -301,7 +300,7 @@ reallochook (__ptr_t ptr, size_t size, const __ptr_t caller) checkhdr (hdr); unlink_blk (hdr); if (size < osize) - flood ((char *) ptr + size, FREEFLOOD, osize - size); + flood ((char *) ptr + size, FREEFLOOD, osize - size); } else { @@ -313,12 +312,12 @@ reallochook (__ptr_t ptr, size_t size, const __ptr_t caller) __memalign_hook = old_memalign_hook; __realloc_hook = old_realloc_hook; if (old_realloc_hook != NULL) - hdr = (struct hdr *) (*old_realloc_hook) ((__ptr_t) hdr, - sizeof (struct hdr) + size + 1, - caller); + hdr = (struct hdr *) (*old_realloc_hook)((__ptr_t) hdr, + sizeof (struct hdr) + size + 1, + caller); else hdr = (struct hdr *) realloc ((__ptr_t) hdr, - sizeof (struct hdr) + size + 1); + sizeof (struct hdr) + size + 1); __free_hook = freehook; __malloc_hook = mallochook; __memalign_hook = memalignhook; @@ -344,19 +343,19 @@ mabort (enum mcheck_status status) switch (status) { case MCHECK_OK: - msg = _("memory is consistent, library is buggy\n"); + msg = _ ("memory is consistent, library is buggy\n"); break; case MCHECK_HEAD: - msg = _("memory clobbered before allocated block\n"); + msg = _ ("memory clobbered before allocated block\n"); break; case MCHECK_TAIL: - msg = _("memory clobbered past end of allocated block\n"); + msg = _ ("memory clobbered past end of allocated block\n"); break; case MCHECK_FREE: - msg = _("block freed twice\n"); + msg = _ ("block freed twice\n"); break; default: - msg = _("bogus mcheck_status, library is buggy\n"); + msg = _ ("bogus mcheck_status, library is buggy\n"); break; } #ifdef _LIBC @@ -370,11 +369,10 @@ mabort (enum mcheck_status status) /* Memory barrier so that GCC does not optimize out the argument. */ #define malloc_opt_barrier(x) \ -({ __typeof (x) __x = x; __asm ("" : "+m" (__x)); __x; }) + ({ __typeof (x) __x = x; __asm ("" : "+m" (__x)); __x; }) -int -mcheck (func) - void (*func) (enum mcheck_status); +int mcheck (func) +void (*func)(enum mcheck_status); { abortfunc = (func != NULL) ? func : &mabort; @@ -404,9 +402,8 @@ mcheck (func) libc_hidden_def (mcheck) #endif -int -mcheck_pedantic (func) - void (*func) (enum mcheck_status); +int mcheck_pedantic (func) +void (*func)(enum mcheck_status); { int res = mcheck (func); if (res == 0) diff --git a/malloc/mcheck.h b/malloc/mcheck.h index 583ae24..7fee5b2 100644 --- a/malloc/mcheck.h +++ b/malloc/mcheck.h @@ -16,7 +16,7 @@ <http://www.gnu.org/licenses/>. */ #ifndef _MCHECK_H -#define _MCHECK_H 1 +#define _MCHECK_H 1 #include <features.h> @@ -25,24 +25,24 @@ __BEGIN_DECLS /* Return values for `mprobe': these are the kinds of inconsistencies that `mcheck' enables detection of. */ enum mcheck_status - { - MCHECK_DISABLED = -1, /* Consistency checking is not turned on. */ - MCHECK_OK, /* Block is fine. */ - MCHECK_FREE, /* Block freed twice. */ - MCHECK_HEAD, /* Memory before the block was clobbered. */ - MCHECK_TAIL /* Memory after the block was clobbered. */ - }; +{ + MCHECK_DISABLED = -1, /* Consistency checking is not turned on. */ + MCHECK_OK, /* Block is fine. */ + MCHECK_FREE, /* Block freed twice. */ + MCHECK_HEAD, /* Memory before the block was clobbered. */ + MCHECK_TAIL /* Memory after the block was clobbered. */ +}; /* Activate a standard collection of debugging hooks. This must be called before `malloc' is ever called. ABORTFUNC is called with an error code (see enum above) when an inconsistency is detected. If ABORTFUNC is null, the standard function prints on stderr and then calls `abort'. */ -extern int mcheck (void (*__abortfunc) (enum mcheck_status)) __THROW; +extern int mcheck (void (*__abortfunc)(enum mcheck_status)) __THROW; /* Similar to `mcheck' but performs checks for all block whenever one of the memory handling functions is called. This can be very slow. */ -extern int mcheck_pedantic (void (*__abortfunc) (enum mcheck_status)) __THROW; +extern int mcheck_pedantic (void (*__abortfunc)(enum mcheck_status)) __THROW; /* Force check of all blocks now. */ extern void mcheck_check_all (void); @@ -57,5 +57,4 @@ extern void mtrace (void) __THROW; extern void muntrace (void) __THROW; __END_DECLS - #endif /* mcheck.h */ diff --git a/malloc/memusage.c b/malloc/memusage.c index 6b636ac..bfbaecc 100644 --- a/malloc/memusage.c +++ b/malloc/memusage.c @@ -38,7 +38,7 @@ /* Pointer to the real functions. These are determined used `dlsym' when really needed. */ -static void *(*mallocp) (size_t); +static void *(*mallocp)(size_t); static void *(*reallocp) (void *, size_t); static void *(*callocp) (size_t, size_t); static void (*freep) (void *); @@ -89,11 +89,11 @@ static memusage_size_t peak_use[3]; static __thread uintptr_t start_sp; /* A few macros to make the source more readable. */ -#define peak_heap peak_use[0] -#define peak_stack peak_use[1] -#define peak_total peak_use[2] +#define peak_heap peak_use[0] +#define peak_stack peak_use[1] +#define peak_total peak_use[2] -#define DEFAULT_BUFFER_SIZE 32768 +#define DEFAULT_BUFFER_SIZE 32768 static size_t buffer_size; static int fd = -1; @@ -164,16 +164,16 @@ update_data (struct header *result, size_t len, size_t old_len) { uatomic32_t idx = catomic_exchange_and_add (&buffer_cnt, 1); if (idx + 1 >= 2 * buffer_size) - { - /* We try to reset the counter to the correct range. If - this fails because of another thread increasing the - counter it does not matter since that thread will take - care of the correction. */ - uatomic32_t reset = (idx + 1) % (2 * buffer_size); - catomic_compare_and_exchange_val_acq (&buffer_cnt, reset, idx + 1); - if (idx >= 2 * buffer_size) - idx = reset - 1; - } + { + /* We try to reset the counter to the correct range. If + this fails because of another thread increasing the + counter it does not matter since that thread will take + care of the correction. */ + uatomic32_t reset = (idx + 1) % (2 * buffer_size); + catomic_compare_and_exchange_val_acq (&buffer_cnt, reset, idx + 1); + if (idx >= 2 * buffer_size) + idx = reset - 1; + } assert (idx < 2 * DEFAULT_BUFFER_SIZE); buffer[idx].heap = current_heap; @@ -182,9 +182,9 @@ update_data (struct header *result, size_t len, size_t old_len) /* Write out buffer if it is full. */ if (idx + 1 == buffer_size) - write (fd, buffer, buffer_size * sizeof (struct entry)); + write (fd, buffer, buffer_size * sizeof (struct entry)); else if (idx + 1 == 2 * buffer_size) - write (fd, &buffer[buffer_size], buffer_size * sizeof (struct entry)); + write (fd, &buffer[buffer_size], buffer_size * sizeof (struct entry)); } } @@ -221,19 +221,19 @@ me (void) size_t prog_len = strlen (__progname); initialized = -1; - mallocp = (void *(*) (size_t)) dlsym (RTLD_NEXT, "malloc"); - reallocp = (void *(*) (void *, size_t)) dlsym (RTLD_NEXT, "realloc"); - callocp = (void *(*) (size_t, size_t)) dlsym (RTLD_NEXT, "calloc"); - freep = (void (*) (void *)) dlsym (RTLD_NEXT, "free"); + mallocp = (void *(*)(size_t))dlsym (RTLD_NEXT, "malloc"); + reallocp = (void *(*)(void *, size_t))dlsym (RTLD_NEXT, "realloc"); + callocp = (void *(*)(size_t, size_t))dlsym (RTLD_NEXT, "calloc"); + freep = (void (*)(void *))dlsym (RTLD_NEXT, "free"); - mmapp = (void *(*) (void *, size_t, int, int, int, off_t)) dlsym (RTLD_NEXT, - "mmap"); + mmapp = (void *(*)(void *, size_t, int, int, int, off_t))dlsym (RTLD_NEXT, + "mmap"); mmap64p = - (void *(*) (void *, size_t, int, int, int, off64_t)) dlsym (RTLD_NEXT, - "mmap64"); - mremapp = (void *(*) (void *, size_t, size_t, int, void *)) dlsym (RTLD_NEXT, - "mremap"); - munmapp = (int (*) (void *, size_t)) dlsym (RTLD_NEXT, "munmap"); + (void *(*)(void *, size_t, int, int, int, off64_t))dlsym (RTLD_NEXT, + "mmap64"); + mremapp = (void *(*)(void *, size_t, size_t, int, void *))dlsym (RTLD_NEXT, + "mremap"); + munmapp = (int (*)(void *, size_t))dlsym (RTLD_NEXT, "munmap"); initialized = 1; if (env != NULL) @@ -241,8 +241,8 @@ me (void) /* Check for program name. */ size_t len = strlen (env); if (len > prog_len || strcmp (env, &__progname[prog_len - len]) != 0 - || (prog_len != len && __progname[prog_len - len - 1] != '/')) - not_me = true; + || (prog_len != len && __progname[prog_len - len - 1] != '/')) + not_me = true; } /* Only open the file if it's really us. */ @@ -251,62 +251,62 @@ me (void) const char *outname; if (!start_sp) - start_sp = GETSP (); + start_sp = GETSP (); outname = getenv ("MEMUSAGE_OUTPUT"); if (outname != NULL && outname[0] != '\0' - && (access (outname, R_OK | W_OK) == 0 || errno == ENOENT)) - { - fd = creat64 (outname, 0666); - - if (fd == -1) - /* Don't do anything in future calls if we cannot write to - the output file. */ - not_me = true; - else - { - /* Write the first entry. */ - first.heap = 0; - first.stack = 0; - GETTIME (first.time_low, first.time_high); - /* Write it two times since we need the starting and end time. */ - write (fd, &first, sizeof (first)); - write (fd, &first, sizeof (first)); - - /* Determine the buffer size. We use the default if the - environment variable is not present. */ - buffer_size = DEFAULT_BUFFER_SIZE; - if (getenv ("MEMUSAGE_BUFFER_SIZE") != NULL) - { - buffer_size = atoi (getenv ("MEMUSAGE_BUFFER_SIZE")); - if (buffer_size == 0 || buffer_size > DEFAULT_BUFFER_SIZE) - buffer_size = DEFAULT_BUFFER_SIZE; - } - - /* Possibly enable timer-based stack pointer retrieval. */ - if (getenv ("MEMUSAGE_NO_TIMER") == NULL) - { - struct sigaction act; - - act.sa_handler = (sighandler_t) &int_handler; - act.sa_flags = SA_RESTART; - sigfillset (&act.sa_mask); - - if (sigaction (SIGPROF, &act, NULL) >= 0) - { - struct itimerval timer; - - timer.it_value.tv_sec = 0; - timer.it_value.tv_usec = 1; - timer.it_interval = timer.it_value; - setitimer (ITIMER_PROF, &timer, NULL); - } - } - } - } + && (access (outname, R_OK | W_OK) == 0 || errno == ENOENT)) + { + fd = creat64 (outname, 0666); + + if (fd == -1) + /* Don't do anything in future calls if we cannot write to + the output file. */ + not_me = true; + else + { + /* Write the first entry. */ + first.heap = 0; + first.stack = 0; + GETTIME (first.time_low, first.time_high); + /* Write it two times since we need the starting and end time. */ + write (fd, &first, sizeof (first)); + write (fd, &first, sizeof (first)); + + /* Determine the buffer size. We use the default if the + environment variable is not present. */ + buffer_size = DEFAULT_BUFFER_SIZE; + if (getenv ("MEMUSAGE_BUFFER_SIZE") != NULL) + { + buffer_size = atoi (getenv ("MEMUSAGE_BUFFER_SIZE")); + if (buffer_size == 0 || buffer_size > DEFAULT_BUFFER_SIZE) + buffer_size = DEFAULT_BUFFER_SIZE; + } + + /* Possibly enable timer-based stack pointer retrieval. */ + if (getenv ("MEMUSAGE_NO_TIMER") == NULL) + { + struct sigaction act; + + act.sa_handler = (sighandler_t) &int_handler; + act.sa_flags = SA_RESTART; + sigfillset (&act.sa_mask); + + if (sigaction (SIGPROF, &act, NULL) >= 0) + { + struct itimerval timer; + + timer.it_value.tv_sec = 0; + timer.it_value.tv_usec = 1; + timer.it_interval = timer.it_value; + setitimer (ITIMER_PROF, &timer, NULL); + } + } + } + } if (!not_me && getenv ("MEMUSAGE_TRACE_MMAP") != NULL) - trace_mmap = true; + trace_mmap = true; } } @@ -317,7 +317,7 @@ __attribute__ ((constructor)) init (void) { start_sp = GETSP (); - if (! initialized) + if (!initialized) me (); } @@ -333,13 +333,14 @@ malloc (size_t len) if (__builtin_expect (initialized <= 0, 0)) { if (initialized == -1) - return NULL; + return NULL; + me (); } /* If this is not the correct program just use the normal function. */ if (not_me) - return (*mallocp) (len); + return (*mallocp)(len); /* Keep track of number of calls. */ catomic_increment (&calls[idx_malloc]); @@ -356,7 +357,7 @@ malloc (size_t len) catomic_increment (&calls_total); /* Do the real work. */ - result = (struct header *) (*mallocp) (len + sizeof (struct header)); + result = (struct header *) (*mallocp)(len + sizeof (struct header)); if (result == NULL) { catomic_increment (&failed[idx_malloc]); @@ -384,13 +385,14 @@ realloc (void *old, size_t len) if (__builtin_expect (initialized <= 0, 0)) { if (initialized == -1) - return NULL; + return NULL; + me (); } /* If this is not the correct program just use the normal function. */ if (not_me) - return (*reallocp) (old, len); + return (*reallocp)(old, len); if (old == NULL) { @@ -402,8 +404,9 @@ realloc (void *old, size_t len) { real = ((struct header *) old) - 1; if (real->magic != MAGIC) - /* This is no memory allocated here. */ - return (*reallocp) (old, len); + /* This is no memory allocated here. */ + return (*reallocp)(old, len); + old_len = real->length; } @@ -442,7 +445,7 @@ realloc (void *old, size_t len) catomic_increment (&calls_total); /* Do the real work. */ - result = (struct header *) (*reallocp) (real, len + sizeof (struct header)); + result = (struct header *) (*reallocp)(real, len + sizeof (struct header)); if (result == NULL) { catomic_increment (&failed[idx_realloc]); @@ -476,13 +479,14 @@ calloc (size_t n, size_t len) if (__builtin_expect (initialized <= 0, 0)) { if (initialized == -1) - return NULL; + return NULL; + me (); } /* If this is not the correct program just use the normal function. */ if (not_me) - return (*callocp) (n, len); + return (*callocp)(n, len); /* Keep track of number of calls. */ catomic_increment (&calls[idx_calloc]); @@ -499,7 +503,7 @@ calloc (size_t n, size_t len) ++calls_total; /* Do the real work. */ - result = (struct header *) (*mallocp) (size + sizeof (struct header)); + result = (struct header *) (*mallocp)(size + sizeof (struct header)); if (result == NULL) { catomic_increment (&failed[idx_calloc]); @@ -525,7 +529,8 @@ free (void *ptr) if (__builtin_expect (initialized <= 0, 0)) { if (initialized == -1) - return; + return; + me (); } @@ -576,17 +581,18 @@ mmap (void *start, size_t len, int prot, int flags, int fd, off_t offset) if (__builtin_expect (initialized <= 0, 0)) { if (initialized == -1) - return NULL; + return NULL; + me (); } /* Always get a block. We don't need extra memory. */ - result = (*mmapp) (start, len, prot, flags, fd, offset); + result = (*mmapp)(start, len, prot, flags, fd, offset); if (!not_me && trace_mmap) { int idx = (flags & MAP_ANON - ? idx_mmap_a : prot & PROT_WRITE ? idx_mmap_w : idx_mmap_r); + ? idx_mmap_a : prot & PROT_WRITE ? idx_mmap_w : idx_mmap_r); /* Keep track of number of calls. */ catomic_increment (&calls[idx]); @@ -596,20 +602,20 @@ mmap (void *start, size_t len, int prot, int flags, int fd, off_t offset) catomic_add (&grand_total, len); /* Remember the size of the request. */ if (len < 65536) - catomic_increment (&histogram[len / 16]); + catomic_increment (&histogram[len / 16]); else - catomic_increment (&large); + catomic_increment (&large); /* Total number of calls of any of the functions. */ catomic_increment (&calls_total); /* Check for failures. */ if (result == NULL) - catomic_increment (&failed[idx]); + catomic_increment (&failed[idx]); else if (idx == idx_mmap_w) - /* Update the allocation data and write out the records if - necessary. Note the first parameter is NULL which means - the size is not tracked. */ - update_data (NULL, len, 0); + /* Update the allocation data and write out the records if + necessary. Note the first parameter is NULL which means + the size is not tracked. */ + update_data (NULL, len, 0); } /* Return the pointer to the user buffer. */ @@ -628,17 +634,18 @@ mmap64 (void *start, size_t len, int prot, int flags, int fd, off64_t offset) if (__builtin_expect (initialized <= 0, 0)) { if (initialized == -1) - return NULL; + return NULL; + me (); } /* Always get a block. We don't need extra memory. */ - result = (*mmap64p) (start, len, prot, flags, fd, offset); + result = (*mmap64p)(start, len, prot, flags, fd, offset); if (!not_me && trace_mmap) { int idx = (flags & MAP_ANON - ? idx_mmap_a : prot & PROT_WRITE ? idx_mmap_w : idx_mmap_r); + ? idx_mmap_a : prot & PROT_WRITE ? idx_mmap_w : idx_mmap_r); /* Keep track of number of calls. */ catomic_increment (&calls[idx]); @@ -648,20 +655,20 @@ mmap64 (void *start, size_t len, int prot, int flags, int fd, off64_t offset) catomic_add (&grand_total, len); /* Remember the size of the request. */ if (len < 65536) - catomic_increment (&histogram[len / 16]); + catomic_increment (&histogram[len / 16]); else - catomic_increment (&large); + catomic_increment (&large); /* Total number of calls of any of the functions. */ catomic_increment (&calls_total); /* Check for failures. */ if (result == NULL) - catomic_increment (&failed[idx]); + catomic_increment (&failed[idx]); else if (idx == idx_mmap_w) - /* Update the allocation data and write out the records if - necessary. Note the first parameter is NULL which means - the size is not tracked. */ - update_data (NULL, len, 0); + /* Update the allocation data and write out the records if + necessary. Note the first parameter is NULL which means + the size is not tracked. */ + update_data (NULL, len, 0); } /* Return the pointer to the user buffer. */ @@ -672,7 +679,7 @@ mmap64 (void *start, size_t len, int prot, int flags, int fd, off64_t offset) /* `mremap' replacement. We do not have to keep track of the size since `munmap' will get it as a parameter. */ void * -mremap (void *start, size_t old_len, size_t len, int flags, ...) +mremap (void *start, size_t old_len, size_t len, int flags, ...) { void *result = NULL; va_list ap; @@ -685,49 +692,50 @@ mremap (void *start, size_t old_len, size_t len, int flags, ...) if (__builtin_expect (initialized <= 0, 0)) { if (initialized == -1) - return NULL; + return NULL; + me (); } /* Always get a block. We don't need extra memory. */ - result = (*mremapp) (start, old_len, len, flags, newaddr); + result = (*mremapp)(start, old_len, len, flags, newaddr); if (!not_me && trace_mmap) { /* Keep track of number of calls. */ catomic_increment (&calls[idx_mremap]); if (len > old_len) - { - /* Keep track of total memory consumption for `malloc'. */ - catomic_add (&total[idx_mremap], len - old_len); - /* Keep track of total memory requirement. */ - catomic_add (&grand_total, len - old_len); - } + { + /* Keep track of total memory consumption for `malloc'. */ + catomic_add (&total[idx_mremap], len - old_len); + /* Keep track of total memory requirement. */ + catomic_add (&grand_total, len - old_len); + } /* Remember the size of the request. */ if (len < 65536) - catomic_increment (&histogram[len / 16]); + catomic_increment (&histogram[len / 16]); else - catomic_increment (&large); + catomic_increment (&large); /* Total number of calls of any of the functions. */ catomic_increment (&calls_total); /* Check for failures. */ if (result == NULL) - catomic_increment (&failed[idx_mremap]); + catomic_increment (&failed[idx_mremap]); else - { - /* Record whether the reduction/increase happened in place. */ - if (start == result) - catomic_increment (&inplace_mremap); - /* Was the buffer increased? */ - if (old_len > len) - catomic_increment (&decreasing_mremap); - - /* Update the allocation data and write out the records if - necessary. Note the first parameter is NULL which means - the size is not tracked. */ - update_data (NULL, len, old_len); - } + { + /* Record whether the reduction/increase happened in place. */ + if (start == result) + catomic_increment (&inplace_mremap); + /* Was the buffer increased? */ + if (old_len > len) + catomic_increment (&decreasing_mremap); + + /* Update the allocation data and write out the records if + necessary. Note the first parameter is NULL which means + the size is not tracked. */ + update_data (NULL, len, old_len); + } } /* Return the pointer to the user buffer. */ @@ -745,12 +753,13 @@ munmap (void *start, size_t len) if (__builtin_expect (initialized <= 0, 0)) { if (initialized == -1) - return -1; + return -1; + me (); } /* Do the real work. */ - result = (*munmapp) (start, len); + result = (*munmapp)(start, len); if (!not_me && trace_mmap) { @@ -758,16 +767,16 @@ munmap (void *start, size_t len) catomic_increment (&calls[idx_munmap]); if (__builtin_expect (result == 0, 1)) - { - /* Keep track of total memory freed using `free'. */ - catomic_add (&total[idx_munmap], len); - - /* Update the allocation data and write out the records if - necessary. */ - update_data (NULL, 0, len); - } + { + /* Keep track of total memory freed using `free'. */ + catomic_add (&total[idx_munmap], len); + + /* Update the allocation data and write out the records if + necessary. */ + update_data (NULL, 0, len); + } else - catomic_increment (&failed[idx_munmap]); + catomic_increment (&failed[idx_munmap]); } return result; @@ -785,6 +794,7 @@ dest (void) /* If we haven't done anything here just return. */ if (not_me) return; + /* If we should call any of the memory functions don't do any profiling. */ not_me = true; @@ -793,13 +803,13 @@ dest (void) { /* Write the partially filled buffer. */ if (buffer_cnt > buffer_size) - write (fd, buffer + buffer_size, - (buffer_cnt - buffer_size) * sizeof (struct entry)); + write (fd, buffer + buffer_size, + (buffer_cnt - buffer_size) * sizeof (struct entry)); else - write (fd, buffer, buffer_cnt * sizeof (struct entry)); + write (fd, buffer, buffer_cnt * sizeof (struct entry)); /* Go back to the beginning of the file. We allocated two records - here when we opened the file. */ + here when we opened the file. */ lseek (fd, 0, SEEK_SET); /* Write out a record containing the total size. */ first.stack = peak_total; @@ -824,25 +834,25 @@ dest (void) \e[00;34mrealloc|\e[0m %10lu %12llu %s%12lu\e[00;00m (nomove:%ld, dec:%ld, free:%ld)\n\ \e[00;34m calloc|\e[0m %10lu %12llu %s%12lu\e[00;00m\n\ \e[00;34m free|\e[0m %10lu %12llu\n", - (unsigned long long int) grand_total, (unsigned long int) peak_heap, - (unsigned long int) peak_stack, - (unsigned long int) calls[idx_malloc], - (unsigned long long int) total[idx_malloc], - failed[idx_malloc] ? "\e[01;41m" : "", - (unsigned long int) failed[idx_malloc], - (unsigned long int) calls[idx_realloc], - (unsigned long long int) total[idx_realloc], - failed[idx_realloc] ? "\e[01;41m" : "", - (unsigned long int) failed[idx_realloc], - (unsigned long int) inplace, - (unsigned long int) decreasing, - (unsigned long int) realloc_free, - (unsigned long int) calls[idx_calloc], - (unsigned long long int) total[idx_calloc], - failed[idx_calloc] ? "\e[01;41m" : "", - (unsigned long int) failed[idx_calloc], - (unsigned long int) calls[idx_free], - (unsigned long long int) total[idx_free]); + (unsigned long long int) grand_total, (unsigned long int) peak_heap, + (unsigned long int) peak_stack, + (unsigned long int) calls[idx_malloc], + (unsigned long long int) total[idx_malloc], + failed[idx_malloc] ? "\e[01;41m" : "", + (unsigned long int) failed[idx_malloc], + (unsigned long int) calls[idx_realloc], + (unsigned long long int) total[idx_realloc], + failed[idx_realloc] ? "\e[01;41m" : "", + (unsigned long int) failed[idx_realloc], + (unsigned long int) inplace, + (unsigned long int) decreasing, + (unsigned long int) realloc_free, + (unsigned long int) calls[idx_calloc], + (unsigned long long int) total[idx_calloc], + failed[idx_calloc] ? "\e[01;41m" : "", + (unsigned long int) failed[idx_calloc], + (unsigned long int) calls[idx_free], + (unsigned long long int) total[idx_free]); if (trace_mmap) fprintf (stderr, "\ @@ -851,28 +861,28 @@ dest (void) \e[00;34mmmap(a)|\e[0m %10lu %12llu %s%12lu\e[00;00m\n\ \e[00;34m mremap|\e[0m %10lu %12llu %s%12lu\e[00;00m (nomove: %ld, dec:%ld)\n\ \e[00;34m munmap|\e[0m %10lu %12llu %s%12lu\e[00;00m\n", - (unsigned long int) calls[idx_mmap_r], - (unsigned long long int) total[idx_mmap_r], - failed[idx_mmap_r] ? "\e[01;41m" : "", - (unsigned long int) failed[idx_mmap_r], - (unsigned long int) calls[idx_mmap_w], - (unsigned long long int) total[idx_mmap_w], - failed[idx_mmap_w] ? "\e[01;41m" : "", - (unsigned long int) failed[idx_mmap_w], - (unsigned long int) calls[idx_mmap_a], - (unsigned long long int) total[idx_mmap_a], - failed[idx_mmap_a] ? "\e[01;41m" : "", - (unsigned long int) failed[idx_mmap_a], - (unsigned long int) calls[idx_mremap], - (unsigned long long int) total[idx_mremap], - failed[idx_mremap] ? "\e[01;41m" : "", - (unsigned long int) failed[idx_mremap], - (unsigned long int) inplace_mremap, - (unsigned long int) decreasing_mremap, - (unsigned long int) calls[idx_munmap], - (unsigned long long int) total[idx_munmap], - failed[idx_munmap] ? "\e[01;41m" : "", - (unsigned long int) failed[idx_munmap]); + (unsigned long int) calls[idx_mmap_r], + (unsigned long long int) total[idx_mmap_r], + failed[idx_mmap_r] ? "\e[01;41m" : "", + (unsigned long int) failed[idx_mmap_r], + (unsigned long int) calls[idx_mmap_w], + (unsigned long long int) total[idx_mmap_w], + failed[idx_mmap_w] ? "\e[01;41m" : "", + (unsigned long int) failed[idx_mmap_w], + (unsigned long int) calls[idx_mmap_a], + (unsigned long long int) total[idx_mmap_a], + failed[idx_mmap_a] ? "\e[01;41m" : "", + (unsigned long int) failed[idx_mmap_a], + (unsigned long int) calls[idx_mremap], + (unsigned long long int) total[idx_mremap], + failed[idx_mremap] ? "\e[01;41m" : "", + (unsigned long int) failed[idx_mremap], + (unsigned long int) inplace_mremap, + (unsigned long int) decreasing_mremap, + (unsigned long int) calls[idx_munmap], + (unsigned long long int) total[idx_munmap], + failed[idx_munmap] ? "\e[01;41m" : "", + (unsigned long int) failed[idx_munmap]); /* Write out a histoogram of the sizes of the allocations. */ fprintf (stderr, "\e[01;32mHistogram for block sizes:\e[0;0m\n"); @@ -887,20 +897,20 @@ dest (void) /* Only write out the nonzero entries. */ if (histogram[cnt / 16] != 0) { - percent = (histogram[cnt / 16] * 100) / calls_total; - fprintf (stderr, "%5d-%-5d%12lu ", cnt, cnt + 15, - (unsigned long int) histogram[cnt / 16]); - if (percent == 0) - fputs (" <1% \e[41;37m", stderr); - else - fprintf (stderr, "%3d%% \e[41;37m", percent); - - /* Draw a bar with a length corresponding to the current + percent = (histogram[cnt / 16] * 100) / calls_total; + fprintf (stderr, "%5d-%-5d%12lu ", cnt, cnt + 15, + (unsigned long int) histogram[cnt / 16]); + if (percent == 0) + fputs (" <1% \e[41;37m", stderr); + else + fprintf (stderr, "%3d%% \e[41;37m", percent); + + /* Draw a bar with a length corresponding to the current percentage. */ - percent = (histogram[cnt / 16] * 50) / maxcalls; - while (percent-- > 0) - fputc ('=', stderr); - fputs ("\e[0;0m\n", stderr); + percent = (histogram[cnt / 16] * 50) / maxcalls; + while (percent-- > 0) + fputc ('=', stderr); + fputs ("\e[0;0m\n", stderr); } if (large != 0) @@ -908,9 +918,9 @@ dest (void) percent = (large * 100) / calls_total; fprintf (stderr, " large %12lu ", (unsigned long int) large); if (percent == 0) - fputs (" <1% \e[41;37m", stderr); + fputs (" <1% \e[41;37m", stderr); else - fprintf (stderr, "%3d%% \e[41;37m", percent); + fprintf (stderr, "%3d%% \e[41;37m", percent); percent = (large * 50) / maxcalls; while (percent-- > 0) fputc ('=', stderr); diff --git a/malloc/memusagestat.c b/malloc/memusagestat.c index 01af517..8ac7ab9 100644 --- a/malloc/memusagestat.c +++ b/malloc/memusagestat.c @@ -53,24 +53,24 @@ /* Definitions of arguments for argp functions. */ static const struct argp_option options[] = { - { "output", 'o', N_("FILE"), 0, N_("Name output file") }, - { "string", 's', N_("STRING"), 0, N_("Title string used in output graphic") }, - { "time", 't', NULL, 0, N_("\ + { "output", 'o', N_ ("FILE"), 0, N_ ("Name output file") }, + { "string", 's', N_ ("STRING"), 0, N_ ("Title string used in output graphic") }, + { "time", 't', NULL, 0, N_ (" \ Generate output linear to time (default is linear to number of function calls)\ ") }, { "total", 'T', NULL, 0, - N_("Also draw graph for total memory consumption") }, - { "x-size", 'x', N_("VALUE"), 0, - N_("Make output graphic VALUE pixels wide") }, - { "y-size", 'y', "VALUE", 0, N_("Make output graphic VALUE pixels high") }, + N_ ("Also draw graph for total memory consumption") }, + { "x-size", 'x', N_ ("VALUE"), 0, + N_ ("Make output graphic VALUE pixels wide") }, + { "y-size", 'y', "VALUE", 0, N_ ("Make output graphic VALUE pixels high") }, { NULL, 0, NULL, 0, NULL } }; /* Short description of program. */ -static const char doc[] = N_("Generate graphic from memory profiling data"); +static const char doc[] = N_ ("Generate graphic from memory profiling data"); /* Strings for arguments in help texts. */ -static const char args_doc[] = N_("DATAFILE [OUTFILE]"); +static const char args_doc[] = N_ ("DATAFILE [OUTFILE]"); /* Prototype for option handler. */ static error_t parse_opt (int key, char *arg, struct argp_state *state); @@ -152,7 +152,7 @@ main (int argc, char *argv[]) if (remaining >= argc || remaining + 2 < argc) { argp_help (&argp, stdout, ARGP_HELP_SEE | ARGP_HELP_EXIT_ERR, - program_invocation_short_name); + program_invocation_short_name); exit (1); } @@ -197,21 +197,21 @@ main (int argc, char *argv[]) if (maxsize_heap == 0 && maxsize_stack == 0) { /* The program aborted before memusage was able to write the - information about the maximum heap and stack use. Repair - the file now. */ + information about the maximum heap and stack use. Repair + the file now. */ struct entry next; while (1) - { - if (read (fd, &next, sizeof (next)) == 0) - break; - if (next.heap > maxsize_heap) - maxsize_heap = next.heap; - if (next.stack > maxsize_stack) - maxsize_stack = next.stack; - if (maxsize_heap + maxsize_stack > maxsize_total) - maxsize_total = maxsize_heap + maxsize_stack; - } + { + if (read (fd, &next, sizeof (next)) == 0) + break; + if (next.heap > maxsize_heap) + maxsize_heap = next.heap; + if (next.stack > maxsize_stack) + maxsize_stack = next.stack; + if (maxsize_heap + maxsize_stack > maxsize_total) + maxsize_total = maxsize_heap + maxsize_stack; + } headent[0].stack = maxsize_total; headent[1].heap = maxsize_heap; @@ -227,7 +227,7 @@ main (int argc, char *argv[]) if (also_total) { /* We use one scale and since we also draw the total amount of - memory used we have to adapt the maximum. */ + memory used we have to adapt the maximum. */ maxsize_heap = maxsize_total; maxsize_stack = maxsize_total; } @@ -292,145 +292,145 @@ main (int argc, char *argv[]) } gdImageString (im_out, gdFontSmall, 38, ysize - 14, (unsigned char *) "0", - blue); + blue); snprintf (buf, sizeof (buf), heap_format, 0); gdImageString (im_out, gdFontSmall, maxsize_heap < 1024 ? 32 : 26, - ysize - 26, (unsigned char *) buf, red); + ysize - 26, (unsigned char *) buf, red); snprintf (buf, sizeof (buf), stack_format, 0); gdImageString (im_out, gdFontSmall, xsize - 37, ysize - 26, - (unsigned char *) buf, green); + (unsigned char *) buf, green); if (string != NULL) gdImageString (im_out, gdFontLarge, (xsize - strlen (string) * 8) / 2, - 2, (unsigned char *) string, green); + 2, (unsigned char *) string, green); gdImageStringUp (im_out, gdFontSmall, 1, ysize / 2 - 10, - (unsigned char *) "allocated", red); + (unsigned char *) "allocated", red); gdImageStringUp (im_out, gdFontSmall, 11, ysize / 2 - 10, - (unsigned char *) "memory", red); + (unsigned char *) "memory", red); gdImageStringUp (im_out, gdFontSmall, xsize - 39, ysize / 2 - 10, - (unsigned char *) "used", green); + (unsigned char *) "used", green); gdImageStringUp (im_out, gdFontSmall, xsize - 27, ysize / 2 - 10, - (unsigned char *) "stack", green); + (unsigned char *) "stack", green); snprintf (buf, sizeof (buf), heap_format, maxsize_heap / heap_scale); gdImageString (im_out, gdFontSmall, 39 - strlen (buf) * 6, 14, - (unsigned char *) buf, red); + (unsigned char *) buf, red); snprintf (buf, sizeof (buf), stack_format, maxsize_stack / stack_scale); gdImageString (im_out, gdFontSmall, xsize - 37, 14, - (unsigned char *) buf, green); + (unsigned char *) buf, green); for (line = 1; line <= 3; ++line) { if (maxsize_heap > 0) - { - cnt = (((ysize - 40) * (maxsize_heap / 4 * line / heap_scale)) - / (maxsize_heap / heap_scale)); - gdImageDashedLine (im_out, 40, ysize - 20 - cnt, xsize - 40, - ysize - 20 - cnt, red); - snprintf (buf, sizeof (buf), heap_format, - maxsize_heap / 4 * line / heap_scale); - gdImageString (im_out, gdFontSmall, 39 - strlen (buf) * 6, - ysize - 26 - cnt, (unsigned char *) buf, red); - } + { + cnt = (((ysize - 40) * (maxsize_heap / 4 * line / heap_scale)) + / (maxsize_heap / heap_scale)); + gdImageDashedLine (im_out, 40, ysize - 20 - cnt, xsize - 40, + ysize - 20 - cnt, red); + snprintf (buf, sizeof (buf), heap_format, + maxsize_heap / 4 * line / heap_scale); + gdImageString (im_out, gdFontSmall, 39 - strlen (buf) * 6, + ysize - 26 - cnt, (unsigned char *) buf, red); + } else - cnt = 0; + cnt = 0; if (maxsize_stack > 0) - cnt2 = (((ysize - 40) * (maxsize_stack / 4 * line / stack_scale)) - / (maxsize_stack / stack_scale)); + cnt2 = (((ysize - 40) * (maxsize_stack / 4 * line / stack_scale)) + / (maxsize_stack / stack_scale)); else - cnt2 = 0; + cnt2 = 0; if (cnt != cnt2) - gdImageDashedLine (im_out, 40, ysize - 20 - cnt2, xsize - 40, - ysize - 20 - cnt2, green); + gdImageDashedLine (im_out, 40, ysize - 20 - cnt2, xsize - 40, + ysize - 20 - cnt2, green); snprintf (buf, sizeof (buf), stack_format, maxsize_stack / 4 * line / - stack_scale); + stack_scale); gdImageString (im_out, gdFontSmall, xsize - 37, ysize - 26 - cnt2, - (unsigned char *) buf, green); + (unsigned char *) buf, green); } snprintf (buf, sizeof (buf), "%llu", (unsigned long long) total); gdImageString (im_out, gdFontSmall, xsize - 50, ysize - 14, - (unsigned char *) buf, blue); + (unsigned char *) buf, blue); if (!time_based) { uint64_t previously = start_time; gdImageString (im_out, gdFontSmall, 40 + (xsize - 32 * 6 - 80) / 2, - ysize - 12, - (unsigned char *) "# memory handling function calls", - blue); + ysize - 12, + (unsigned char *) "# memory handling function calls", + blue); last_stack = last_heap = last_total = ysize - 20; for (cnt = 1; cnt <= total; ++cnt) - { - struct entry entry; - size_t new[2]; - uint64_t now; - - read (fd, &entry, sizeof (entry)); - - now = ((uint64_t) entry.time_high) << 32 | entry.time_low; - - if ((((previously - start_time) * 100) / total_time) % 10 < 5) - gdImageFilledRectangle (im_out, - 40 + ((cnt - 1) * (xsize - 80)) / total, - ysize - 19, - 39 + (cnt * (xsize - 80)) / total, - ysize - 14, yellow); - previously = now; - - if (also_total && maxsize_heap > 0) - { - size_t new3; - - new3 = (ysize - 20) - ((((unsigned long long int) (ysize - 40)) - * (entry.heap + entry.stack)) - / maxsize_heap); - gdImageLine (im_out, 40 + ((xsize - 80) * (cnt - 1)) / total, - last_total, - 40 + ((xsize - 80) * cnt) / total, new3, - black); - last_total = new3; - } - - if (maxsize_heap > 0) - { - new[0] = ((ysize - 20) - - ((((unsigned long long int) (ysize - 40)) - * entry.heap) / maxsize_heap)); - gdImageLine (im_out, 40 + ((xsize - 80) * (cnt - 1)) / total, - last_heap, 40 + ((xsize - 80) * cnt) / total, - new[0], red); - last_heap = new[0]; - } - - if (maxsize_stack > 0) - { - new[1] = ((ysize - 20) - - ((((unsigned long long int) (ysize - 40)) - * entry.stack) / maxsize_stack)); - gdImageLine (im_out, 40 + ((xsize - 80) * (cnt - 1)) / total, - last_stack, 40 + ((xsize - 80) * cnt) / total, - new[1], green); - last_stack = new[1]; - } - } + { + struct entry entry; + size_t new[2]; + uint64_t now; + + read (fd, &entry, sizeof (entry)); + + now = ((uint64_t) entry.time_high) << 32 | entry.time_low; + + if ((((previously - start_time) * 100) / total_time) % 10 < 5) + gdImageFilledRectangle (im_out, + 40 + ((cnt - 1) * (xsize - 80)) / total, + ysize - 19, + 39 + (cnt * (xsize - 80)) / total, + ysize - 14, yellow); + previously = now; + + if (also_total && maxsize_heap > 0) + { + size_t new3; + + new3 = (ysize - 20) - ((((unsigned long long int) (ysize - 40)) + * (entry.heap + entry.stack)) + / maxsize_heap); + gdImageLine (im_out, 40 + ((xsize - 80) * (cnt - 1)) / total, + last_total, + 40 + ((xsize - 80) * cnt) / total, new3, + black); + last_total = new3; + } + + if (maxsize_heap > 0) + { + new[0] = ((ysize - 20) + - ((((unsigned long long int) (ysize - 40)) + * entry.heap) / maxsize_heap)); + gdImageLine (im_out, 40 + ((xsize - 80) * (cnt - 1)) / total, + last_heap, 40 + ((xsize - 80) * cnt) / total, + new[0], red); + last_heap = new[0]; + } + + if (maxsize_stack > 0) + { + new[1] = ((ysize - 20) + - ((((unsigned long long int) (ysize - 40)) + * entry.stack) / maxsize_stack)); + gdImageLine (im_out, 40 + ((xsize - 80) * (cnt - 1)) / total, + last_stack, 40 + ((xsize - 80) * cnt) / total, + new[1], green); + last_stack = new[1]; + } + } cnt = 0; while (cnt < total) - { - gdImageLine (im_out, 40 + ((xsize - 80) * cnt) / total, ysize - 20, - 40 + ((xsize - 80) * cnt) / total, ysize - 15, blue); - cnt += MAX (1, total / 20); - } + { + gdImageLine (im_out, 40 + ((xsize - 80) * cnt) / total, ysize - 20, + 40 + ((xsize - 80) * cnt) / total, ysize - 15, blue); + cnt += MAX (1, total / 20); + } gdImageLine (im_out, xsize - 40, ysize - 20, xsize - 40, ysize - 15, - blue); + blue); } else { @@ -438,67 +438,67 @@ main (int argc, char *argv[]) size_t last_xpos = 40; gdImageString (im_out, gdFontSmall, 40 + (xsize - 39 * 6 - 80) / 2, - ysize - 12, - (unsigned char *) "\ + ysize - 12, + (unsigned char *) " \ # memory handling function calls / time", blue); for (cnt = 0; cnt < 20; cnt += 2) - gdImageFilledRectangle (im_out, - 40 + (cnt * (xsize - 80)) / 20, ysize - 19, - 39 + ((cnt + 1) * (xsize - 80)) / 20, - ysize - 14, yellow); + gdImageFilledRectangle (im_out, + 40 + (cnt * (xsize - 80)) / 20, ysize - 19, + 39 + ((cnt + 1) * (xsize - 80)) / 20, + ysize - 14, yellow); last_stack = last_heap = last_total = ysize - 20; for (cnt = 1; cnt <= total; ++cnt) - { - struct entry entry; - size_t new[2]; - size_t xpos; - uint64_t now; - - read (fd, &entry, sizeof (entry)); - - now = ((uint64_t) entry.time_high) << 32 | entry.time_low; - xpos = 40 + ((xsize - 80) * (now - start_time)) / total_time; - - if (cnt == next_tick) - { - gdImageLine (im_out, xpos, ysize - 20, xpos, ysize - 15, blue); - next_tick += MAX (1, total / 20); - } - - if (also_total && maxsize_heap > 0) - { - size_t new3; - - new3 = (ysize - 20) - ((((unsigned long long int) (ysize - 40)) - * (entry.heap + entry.stack)) - / maxsize_heap); - gdImageLine (im_out, last_xpos, last_total, xpos, new3, black); - last_total = new3; - } - - if (maxsize_heap > 0) - { - new[0] = ((ysize - 20) - - ((((unsigned long long int) (ysize - 40)) - * entry.heap) / maxsize_heap)); - gdImageLine (im_out, last_xpos, last_heap, xpos, new[0], red); - last_heap = new[0]; - } - - if (maxsize_stack > 0) - { - new[1] = ((ysize - 20) - - ((((unsigned long long int) (ysize - 40)) - * entry.stack) / maxsize_stack)); - gdImageLine (im_out, last_xpos, last_stack, xpos, new[1], - green); - last_stack = new[1]; - } - - last_xpos = xpos; - } + { + struct entry entry; + size_t new[2]; + size_t xpos; + uint64_t now; + + read (fd, &entry, sizeof (entry)); + + now = ((uint64_t) entry.time_high) << 32 | entry.time_low; + xpos = 40 + ((xsize - 80) * (now - start_time)) / total_time; + + if (cnt == next_tick) + { + gdImageLine (im_out, xpos, ysize - 20, xpos, ysize - 15, blue); + next_tick += MAX (1, total / 20); + } + + if (also_total && maxsize_heap > 0) + { + size_t new3; + + new3 = (ysize - 20) - ((((unsigned long long int) (ysize - 40)) + * (entry.heap + entry.stack)) + / maxsize_heap); + gdImageLine (im_out, last_xpos, last_total, xpos, new3, black); + last_total = new3; + } + + if (maxsize_heap > 0) + { + new[0] = ((ysize - 20) + - ((((unsigned long long int) (ysize - 40)) + * entry.heap) / maxsize_heap)); + gdImageLine (im_out, last_xpos, last_heap, xpos, new[0], red); + last_heap = new[0]; + } + + if (maxsize_stack > 0) + { + new[1] = ((ysize - 20) + - ((((unsigned long long int) (ysize - 40)) + * entry.stack) / maxsize_stack)); + gdImageLine (im_out, last_xpos, last_stack, xpos, new[1], + green); + last_stack = new[1]; + } + + last_xpos = xpos; + } } /* Write out the result. */ @@ -537,12 +537,12 @@ parse_opt (int key, char *arg, struct argp_state *state) case 'x': xsize = atoi (arg); if (xsize == 0) - xsize = XSIZE; + xsize = XSIZE; break; case 'y': ysize = atoi (arg); if (ysize == 0) - ysize = XSIZE; + ysize = XSIZE; break; default: return ARGP_ERR_UNKNOWN; @@ -563,8 +563,10 @@ more_help (int key, const char *text, void *input) if (asprintf (&tp, gettext ("\ For bug reporting instructions, please see:\n\ %s.\n"), REPORT_BUGS_TO) < 0) - return NULL; + return NULL; + return tp; + default: break; } diff --git a/malloc/morecore.c b/malloc/morecore.c index 463cf28..efcc615 100644 --- a/malloc/morecore.c +++ b/malloc/morecore.c @@ -15,27 +15,27 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ -#ifndef _MALLOC_INTERNAL -#define _MALLOC_INTERNAL -#include <malloc.h> +#ifndef _MALLOC_INTERNAL +# define _MALLOC_INTERNAL +# include <malloc.h> #endif -#ifndef __GNU_LIBRARY__ -#define __sbrk sbrk +#ifndef __GNU_LIBRARY__ +# define __sbrk sbrk #endif #ifdef __GNU_LIBRARY__ /* It is best not to declare this and cast its result on foreign operating systems with potentially hostile include files. */ -#include <stddef.h> -#include <stdlib.h> +# include <stddef.h> +# include <stdlib.h> extern void *__sbrk (ptrdiff_t increment) __THROW; libc_hidden_proto (__sbrk) #endif #ifndef NULL -#define NULL 0 +# define NULL 0 #endif /* Allocate INCREMENT more bytes of data space, @@ -47,6 +47,7 @@ __default_morecore (ptrdiff_t increment) void *result = (void *) __sbrk (increment); if (result == (void *) -1) return NULL; + return result; } libc_hidden_def (__default_morecore) diff --git a/malloc/mtrace.c b/malloc/mtrace.c index a33399a..99ebaff 100644 --- a/malloc/mtrace.c +++ b/malloc/mtrace.c @@ -1,8 +1,8 @@ /* More debugging hooks for `malloc'. Copyright (C) 1991-2014 Free Software Foundation, Inc. This file is part of the GNU C Library. - Written April 2, 1991 by John Gilmore of Cygnus Support. - Based on mcheck.c by Mike Haertel. + Written April 2, 1991 by John Gilmore of Cygnus Support. + Based on mcheck.c by Mike Haertel. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public @@ -18,11 +18,11 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ -#ifndef _MALLOC_INTERNAL -#define _MALLOC_INTERNAL -#include <malloc.h> -#include <mcheck.h> -#include <bits/libc-lock.h> +#ifndef _MALLOC_INTERNAL +# define _MALLOC_INTERNAL +# include <malloc.h> +# include <mcheck.h> +# include <bits/libc-lock.h> #endif #include <dlfcn.h> @@ -48,7 +48,7 @@ #define TRACE_BUFFER_SIZE 512 static FILE *mallstream; -static const char mallenv[]= "MALLOC_TRACE"; +static const char mallenv[] = "MALLOC_TRACE"; static char *malloc_trace_buffer; __libc_lock_define_initialized (static, lock); @@ -60,9 +60,9 @@ __ptr_t mallwatch; static void (*tr_old_free_hook) (__ptr_t ptr, const __ptr_t); static __ptr_t (*tr_old_malloc_hook) (size_t size, const __ptr_t); static __ptr_t (*tr_old_realloc_hook) (__ptr_t ptr, size_t size, - const __ptr_t); + const __ptr_t); static __ptr_t (*tr_old_memalign_hook) (size_t __alignment, size_t __size, - const __ptr_t); + const __ptr_t); /* This function is called when the block being alloc'd, realloc'd, or freed has an address matching the variable "mallwatch". In a debugger, @@ -79,39 +79,38 @@ libc_hidden_def (tr_break) static void tr_where (const __ptr_t, Dl_info *) __THROW internal_function; static void -internal_function -tr_where (caller, info) - const __ptr_t caller; - Dl_info *info; +internal_function tr_where (caller, info) +const __ptr_t caller; +Dl_info *info; { if (caller != NULL) { if (info != NULL) - { - char *buf = (char *) ""; - if (info->dli_sname != NULL) - { - size_t len = strlen (info->dli_sname); - buf = alloca (len + 6 + 2 * sizeof (void *)); - - buf[0] = '('; - __stpcpy (_fitoa (caller >= (const __ptr_t) info->dli_saddr - ? caller - (const __ptr_t) info->dli_saddr - : (const __ptr_t) info->dli_saddr - caller, - __stpcpy (__mempcpy (buf + 1, info->dli_sname, - len), - caller >= (__ptr_t) info->dli_saddr - ? "+0x" : "-0x"), - 16, 0), - ")"); - } - - fprintf (mallstream, "@ %s%s%s[%p] ", - info->dli_fname ?: "", info->dli_fname ? ":" : "", - buf, caller); - } + { + char *buf = (char *) ""; + if (info->dli_sname != NULL) + { + size_t len = strlen (info->dli_sname); + buf = alloca (len + 6 + 2 * sizeof (void *)); + + buf[0] = '('; + __stpcpy (_fitoa (caller >= (const __ptr_t) info->dli_saddr + ? caller - (const __ptr_t) info->dli_saddr + : (const __ptr_t) info->dli_saddr - caller, + __stpcpy (__mempcpy (buf + 1, info->dli_sname, + len), + caller >= (__ptr_t) info->dli_saddr + ? "+0x" : "-0x"), + 16, 0), + ")"); + } + + fprintf (mallstream, "@ %s%s%s[%p] ", + info->dli_fname ? : "", info->dli_fname ? ":" : "", + buf, caller); + } else - fprintf (mallstream, "@ [%p] ", caller); + fprintf (mallstream, "@ [%p] ", caller); } } @@ -131,10 +130,9 @@ lock_and_info (const __ptr_t caller, Dl_info *mem) static void tr_freehook (__ptr_t, const __ptr_t) __THROW; -static void -tr_freehook (ptr, caller) - __ptr_t ptr; - const __ptr_t caller; +static void tr_freehook (ptr, caller) +__ptr_t ptr; +const __ptr_t caller; { if (ptr == NULL) return; @@ -152,7 +150,7 @@ tr_freehook (ptr, caller) } __free_hook = tr_old_free_hook; if (tr_old_free_hook != NULL) - (*tr_old_free_hook) (ptr, caller); + (*tr_old_free_hook)(ptr, caller); else free (ptr); __free_hook = tr_freehook; @@ -160,10 +158,9 @@ tr_freehook (ptr, caller) } static __ptr_t tr_mallochook (size_t, const __ptr_t) __THROW; -static __ptr_t -tr_mallochook (size, caller) - size_t size; - const __ptr_t caller; +static __ptr_t tr_mallochook (size, caller) +size_t size; +const __ptr_t caller; { __ptr_t hdr; @@ -172,7 +169,7 @@ tr_mallochook (size, caller) __malloc_hook = tr_old_malloc_hook; if (tr_old_malloc_hook != NULL) - hdr = (__ptr_t) (*tr_old_malloc_hook) (size, caller); + hdr = (__ptr_t) (*tr_old_malloc_hook)(size, caller); else hdr = (__ptr_t) malloc (size); __malloc_hook = tr_mallochook; @@ -190,12 +187,11 @@ tr_mallochook (size, caller) } static __ptr_t tr_reallochook (__ptr_t, size_t, const __ptr_t) - __THROW; -static __ptr_t -tr_reallochook (ptr, size, caller) - __ptr_t ptr; - size_t size; - const __ptr_t caller; +__THROW; +static __ptr_t tr_reallochook (ptr, size, caller) +__ptr_t ptr; +size_t size; +const __ptr_t caller; { __ptr_t hdr; @@ -209,7 +205,7 @@ tr_reallochook (ptr, size, caller) __malloc_hook = tr_old_malloc_hook; __realloc_hook = tr_old_realloc_hook; if (tr_old_realloc_hook != NULL) - hdr = (__ptr_t) (*tr_old_realloc_hook) (ptr, size, caller); + hdr = (__ptr_t) (*tr_old_realloc_hook)(ptr, size, caller); else hdr = (__ptr_t) realloc (ptr, size); __free_hook = tr_freehook; @@ -220,10 +216,10 @@ tr_reallochook (ptr, size, caller) if (hdr == NULL) { if (size != 0) - /* Failed realloc. */ - fprintf (mallstream, "! %p %#lx\n", ptr, (unsigned long int) size); + /* Failed realloc. */ + fprintf (mallstream, "! %p %#lx\n", ptr, (unsigned long int) size); else - fprintf (mallstream, "- %p\n", ptr); + fprintf (mallstream, "- %p\n", ptr); } else if (ptr == NULL) fprintf (mallstream, "+ %p %#lx\n", hdr, (unsigned long int) size); @@ -243,11 +239,10 @@ tr_reallochook (ptr, size, caller) } static __ptr_t tr_memalignhook (size_t, size_t, - const __ptr_t) __THROW; -static __ptr_t -tr_memalignhook (alignment, size, caller) - size_t alignment, size; - const __ptr_t caller; + const __ptr_t) __THROW; +static __ptr_t tr_memalignhook (alignment, size, caller) +size_t alignment, size; +const __ptr_t caller; { __ptr_t hdr; @@ -257,7 +252,7 @@ tr_memalignhook (alignment, size, caller) __memalign_hook = tr_old_memalign_hook; __malloc_hook = tr_old_malloc_hook; if (tr_old_memalign_hook != NULL) - hdr = (__ptr_t) (*tr_old_memalign_hook) (alignment, size, caller); + hdr = (__ptr_t) (*tr_old_memalign_hook)(alignment, size, caller); else hdr = (__ptr_t) memalign (alignment, size); __memalign_hook = tr_memalignhook; @@ -321,44 +316,44 @@ mtrace (void) { char *mtb = malloc (TRACE_BUFFER_SIZE); if (mtb == NULL) - return; + return; mallstream = fopen (mallfile != NULL ? mallfile : "/dev/null", "wce"); if (mallstream != NULL) - { + { #ifndef __ASSUME_O_CLOEXEC - /* Make sure we close the file descriptor on exec. */ - int flags = __fcntl (fileno (mallstream), F_GETFD, 0); - if (flags >= 0) - { - flags |= FD_CLOEXEC; - __fcntl (fileno (mallstream), F_SETFD, flags); - } + /* Make sure we close the file descriptor on exec. */ + int flags = __fcntl (fileno (mallstream), F_GETFD, 0); + if (flags >= 0) + { + flags |= FD_CLOEXEC; + __fcntl (fileno (mallstream), F_SETFD, flags); + } #endif - /* Be sure it doesn't malloc its buffer! */ - malloc_trace_buffer = mtb; - setvbuf (mallstream, malloc_trace_buffer, _IOFBF, TRACE_BUFFER_SIZE); - fprintf (mallstream, "= Start\n"); - tr_old_free_hook = __free_hook; - __free_hook = tr_freehook; - tr_old_malloc_hook = __malloc_hook; - __malloc_hook = tr_mallochook; - tr_old_realloc_hook = __realloc_hook; - __realloc_hook = tr_reallochook; - tr_old_memalign_hook = __memalign_hook; - __memalign_hook = tr_memalignhook; + /* Be sure it doesn't malloc its buffer! */ + malloc_trace_buffer = mtb; + setvbuf (mallstream, malloc_trace_buffer, _IOFBF, TRACE_BUFFER_SIZE); + fprintf (mallstream, "= Start\n"); + tr_old_free_hook = __free_hook; + __free_hook = tr_freehook; + tr_old_malloc_hook = __malloc_hook; + __malloc_hook = tr_mallochook; + tr_old_realloc_hook = __realloc_hook; + __realloc_hook = tr_reallochook; + tr_old_memalign_hook = __memalign_hook; + __memalign_hook = tr_memalignhook; #ifdef _LIBC - if (!added_atexit_handler) - { - extern void *__dso_handle __attribute__ ((__weak__)); - added_atexit_handler = 1; - __cxa_atexit ((void (*) (void *)) release_libc_mem, NULL, - &__dso_handle ? __dso_handle : NULL); - } + if (!added_atexit_handler) + { + extern void *__dso_handle __attribute__ ((__weak__)); + added_atexit_handler = 1; + __cxa_atexit ((void (*)(void *))release_libc_mem, NULL, + &__dso_handle ? __dso_handle : NULL); + } #endif - } + } else - free (mtb); + free (mtb); } } diff --git a/malloc/obstack.c b/malloc/obstack.c index 90e1634..4064f61 100644 --- a/malloc/obstack.c +++ b/malloc/obstack.c @@ -42,7 +42,7 @@ program understand `configure --with-gnu-libc' and omit the object files, it is simpler to just do this in the source for each such file. */ -#include <stdio.h> /* Random thing to get __GNU_LIBRARY__. */ +#include <stdio.h> /* Random thing to get __GNU_LIBRARY__. */ #if !defined _LIBC && defined __GNU_LIBRARY__ && __GNU_LIBRARY__ > 1 # include <gnu-versions.h> # if _GNU_OBSTACK_INTERFACE_VERSION == OBSTACK_INTERFACE_VERSION @@ -78,10 +78,10 @@ struct fooalign But in fact it might be less smart and round addresses to as much as DEFAULT_ROUNDING. So we prepare for it to do that. */ enum - { - DEFAULT_ALIGNMENT = offsetof (struct fooalign, u), - DEFAULT_ROUNDING = sizeof (union fooround) - }; +{ + DEFAULT_ALIGNMENT = offsetof (struct fooalign, u), + DEFAULT_ROUNDING = sizeof (union fooround) +}; /* When we copy a long block of data, this is the unit to do it with. On some machines, copying successive ints does not work; @@ -127,19 +127,19 @@ compat_symbol (libc, _obstack_compat, _obstack, GLIBC_2_0); do not allow (expr) ? void : void. */ # define CALL_CHUNKFUN(h, size) \ - (((h) -> use_extra_arg) \ - ? (*(h)->chunkfun) ((h)->extra_arg, (size)) \ - : (*(struct _obstack_chunk *(*) (long)) (h)->chunkfun) ((size))) + (((h)->use_extra_arg) \ + ? (*(h)->chunkfun)((h)->extra_arg, (size)) \ + : (*(struct _obstack_chunk *(*)(long))(h)->chunkfun)((size))) # define CALL_FREEFUN(h, old_chunk) \ do { \ - if ((h) -> use_extra_arg) \ - (*(h)->freefun) ((h)->extra_arg, (old_chunk)); \ - else \ - (*(void (*) (void *)) (h)->freefun) ((old_chunk)); \ - } while (0) + if ((h)->use_extra_arg) \ + (*(h)->freefun)((h)->extra_arg, (old_chunk)); \ + else \ + (*(void (*)(void *))(h)->freefun)((old_chunk)); \ + } while (0) + - /* Initialize an obstack H for use. Specify chunk size SIZE (0 means default). Objects start on multiples of ALIGNMENT (0 means use default). CHUNKFUN is the function to use to allocate chunks, @@ -150,44 +150,44 @@ compat_symbol (libc, _obstack_compat, _obstack, GLIBC_2_0); int _obstack_begin (struct obstack *h, - int size, int alignment, - void *(*chunkfun) (long), - void (*freefun) (void *)) + int size, int alignment, + void *(*chunkfun)(long), + void (*freefun)(void *)) { struct _obstack_chunk *chunk; /* points to new chunk */ if (alignment == 0) alignment = DEFAULT_ALIGNMENT; if (size == 0) - /* Default size is what GNU malloc can fit in a 4096-byte block. */ + /* Default size is what GNU malloc can fit in a 4096-byte block. */ { /* 12 is sizeof (mhead) and 4 is EXTRA from GNU malloc. - Use the values for range checking, because if range checking is off, - the extra bytes won't be missed terribly, but if range checking is on - and we used a larger request, a whole extra 4096 bytes would be - allocated. + Use the values for range checking, because if range checking is off, + the extra bytes won't be missed terribly, but if range checking is on + and we used a larger request, a whole extra 4096 bytes would be + allocated. - These number are irrelevant to the new GNU malloc. I suspect it is - less sensitive to the size of the request. */ + These number are irrelevant to the new GNU malloc. I suspect it is + less sensitive to the size of the request. */ int extra = ((((12 + DEFAULT_ROUNDING - 1) & ~(DEFAULT_ROUNDING - 1)) - + 4 + DEFAULT_ROUNDING - 1) - & ~(DEFAULT_ROUNDING - 1)); + + 4 + DEFAULT_ROUNDING - 1) + & ~(DEFAULT_ROUNDING - 1)); size = 4096 - extra; } - h->chunkfun = (struct _obstack_chunk * (*)(void *, long)) chunkfun; - h->freefun = (void (*) (void *, struct _obstack_chunk *)) freefun; + h->chunkfun = (struct _obstack_chunk * (*)(void *, long))chunkfun; + h->freefun = (void (*)(void *, struct _obstack_chunk *))freefun; h->chunk_size = size; h->alignment_mask = alignment - 1; h->use_extra_arg = 0; - chunk = h->chunk = CALL_CHUNKFUN (h, h -> chunk_size); + chunk = h->chunk = CALL_CHUNKFUN (h, h->chunk_size); if (!chunk) - (*obstack_alloc_failed_handler) (); + (*obstack_alloc_failed_handler)(); h->next_free = h->object_base = __PTR_ALIGN ((char *) chunk, chunk->contents, - alignment - 1); + alignment - 1); h->chunk_limit = chunk->limit - = (char *) chunk + h->chunk_size; + = (char *) chunk + h->chunk_size; chunk->prev = 0; /* The initial chunk now contains no empty object. */ h->maybe_empty_object = 0; @@ -197,45 +197,45 @@ _obstack_begin (struct obstack *h, int _obstack_begin_1 (struct obstack *h, int size, int alignment, - void *(*chunkfun) (void *, long), - void (*freefun) (void *, void *), - void *arg) + void *(*chunkfun)(void *, long), + void (*freefun)(void *, void *), + void *arg) { struct _obstack_chunk *chunk; /* points to new chunk */ if (alignment == 0) alignment = DEFAULT_ALIGNMENT; if (size == 0) - /* Default size is what GNU malloc can fit in a 4096-byte block. */ + /* Default size is what GNU malloc can fit in a 4096-byte block. */ { /* 12 is sizeof (mhead) and 4 is EXTRA from GNU malloc. - Use the values for range checking, because if range checking is off, - the extra bytes won't be missed terribly, but if range checking is on - and we used a larger request, a whole extra 4096 bytes would be - allocated. + Use the values for range checking, because if range checking is off, + the extra bytes won't be missed terribly, but if range checking is on + and we used a larger request, a whole extra 4096 bytes would be + allocated. - These number are irrelevant to the new GNU malloc. I suspect it is - less sensitive to the size of the request. */ + These number are irrelevant to the new GNU malloc. I suspect it is + less sensitive to the size of the request. */ int extra = ((((12 + DEFAULT_ROUNDING - 1) & ~(DEFAULT_ROUNDING - 1)) - + 4 + DEFAULT_ROUNDING - 1) - & ~(DEFAULT_ROUNDING - 1)); + + 4 + DEFAULT_ROUNDING - 1) + & ~(DEFAULT_ROUNDING - 1)); size = 4096 - extra; } - h->chunkfun = (struct _obstack_chunk * (*)(void *,long)) chunkfun; - h->freefun = (void (*) (void *, struct _obstack_chunk *)) freefun; + h->chunkfun = (struct _obstack_chunk * (*)(void *, long))chunkfun; + h->freefun = (void (*)(void *, struct _obstack_chunk *))freefun; h->chunk_size = size; h->alignment_mask = alignment - 1; h->extra_arg = arg; h->use_extra_arg = 1; - chunk = h->chunk = CALL_CHUNKFUN (h, h -> chunk_size); + chunk = h->chunk = CALL_CHUNKFUN (h, h->chunk_size); if (!chunk) - (*obstack_alloc_failed_handler) (); + (*obstack_alloc_failed_handler)(); h->next_free = h->object_base = __PTR_ALIGN ((char *) chunk, chunk->contents, - alignment - 1); + alignment - 1); h->chunk_limit = chunk->limit - = (char *) chunk + h->chunk_size; + = (char *) chunk + h->chunk_size; chunk->prev = 0; /* The initial chunk now contains no empty object. */ h->maybe_empty_object = 0; @@ -254,7 +254,7 @@ _obstack_newchunk (struct obstack *h, int length) { struct _obstack_chunk *old_chunk = h->chunk; struct _obstack_chunk *new_chunk; - long new_size; + long new_size; long obj_size = h->next_free - h->object_base; long i; long already; @@ -268,7 +268,7 @@ _obstack_newchunk (struct obstack *h, int length) /* Allocate and initialize the new chunk. */ new_chunk = CALL_CHUNKFUN (h, new_size); if (!new_chunk) - (*obstack_alloc_failed_handler) (); + (*obstack_alloc_failed_handler)(); h->chunk = new_chunk; new_chunk->prev = old_chunk; new_chunk->limit = h->chunk_limit = (char *) new_chunk + new_size; @@ -283,12 +283,12 @@ _obstack_newchunk (struct obstack *h, int length) if (h->alignment_mask + 1 >= DEFAULT_ALIGNMENT) { for (i = obj_size / sizeof (COPYING_UNIT) - 1; - i >= 0; i--) - ((COPYING_UNIT *)object_base)[i] - = ((COPYING_UNIT *)h->object_base)[i]; + i >= 0; i--) + ((COPYING_UNIT *) object_base)[i] + = ((COPYING_UNIT *) h->object_base)[i]; /* We used to copy the odd few remaining bytes as one extra COPYING_UNIT, - but that can cross a page boundary on a machine - which does not do strict alignment for COPYING_UNITS. */ + but that can cross a page boundary on a machine + which does not do strict alignment for COPYING_UNITS. */ already = obj_size / sizeof (COPYING_UNIT) * sizeof (COPYING_UNIT); } else @@ -300,10 +300,10 @@ _obstack_newchunk (struct obstack *h, int length) /* If the object just copied was the only data in OLD_CHUNK, free that chunk and remove it from the chain. But not if that chunk might contain an empty object. */ - if (! h->maybe_empty_object + if (!h->maybe_empty_object && (h->object_base - == __PTR_ALIGN ((char *) old_chunk, old_chunk->contents, - h->alignment_mask))) + == __PTR_ALIGN ((char *) old_chunk, old_chunk->contents, + h->alignment_mask))) { new_chunk->prev = old_chunk->prev; CALL_FREEFUN (h, old_chunk); @@ -329,8 +329,8 @@ int _obstack_allocated_p (struct obstack *h, void *obj); int _obstack_allocated_p (struct obstack *h, void *obj) { - struct _obstack_chunk *lp; /* below addr of any objects in this chunk */ - struct _obstack_chunk *plp; /* point to previous chunk if any */ + struct _obstack_chunk *lp; /* below addr of any objects in this chunk */ + struct _obstack_chunk *plp; /* point to previous chunk if any */ lp = (h)->chunk; /* We use >= rather than > since the object cannot be exactly at @@ -343,7 +343,7 @@ _obstack_allocated_p (struct obstack *h, void *obj) } return lp != 0; } - + /* Free objects in obstack H, including OBJ and everything allocate more recently than OBJ. If OBJ is zero, free everything in H. */ @@ -352,8 +352,8 @@ _obstack_allocated_p (struct obstack *h, void *obj) void obstack_free (struct obstack *h, void *obj) { - struct _obstack_chunk *lp; /* below addr of any objects in this chunk */ - struct _obstack_chunk *plp; /* point to previous chunk if any */ + struct _obstack_chunk *lp; /* below addr of any objects in this chunk */ + struct _obstack_chunk *plp; /* point to previous chunk if any */ lp = h->chunk; /* We use >= because there cannot be an object at the beginning of a chunk. @@ -365,7 +365,7 @@ obstack_free (struct obstack *h, void *obj) CALL_FREEFUN (h, lp); lp = plp; /* If we switch chunks, we can't tell whether the new current - chunk contains an empty object, so assume that it may. */ + chunk contains an empty object, so assume that it may. */ h->maybe_empty_object = 1; } if (lp) @@ -384,11 +384,11 @@ obstack_free (struct obstack *h, void *obj) called by non-GCC compilers. */ strong_alias (obstack_free, _obstack_free) # endif - + int _obstack_memory_used (struct obstack *h) { - struct _obstack_chunk* lp; + struct _obstack_chunk *lp; int nbytes = 0; for (lp = h->chunk; lp != 0; lp = lp->prev) @@ -397,7 +397,7 @@ _obstack_memory_used (struct obstack *h) } return nbytes; } - + /* Define the error handler. */ # ifdef _LIBC # include <libintl.h> @@ -429,11 +429,10 @@ print_and_abort (void) like this and the translation should be reused instead of creating a very similar string which requires a separate translation. */ # ifdef _LIBC - (void) __fxprintf (NULL, "%s\n", _("memory exhausted")); + (void) __fxprintf (NULL, "%s\n", _ ("memory exhausted")); # else - fprintf (stderr, "%s\n", _("memory exhausted")); + fprintf (stderr, "%s\n", _ ("memory exhausted")); # endif exit (obstack_exit_failure); } - -#endif /* !ELIDE_CODE */ +#endif /* !ELIDE_CODE */ diff --git a/malloc/obstack.h b/malloc/obstack.h index 3bc7887..85472f9 100644 --- a/malloc/obstack.h +++ b/malloc/obstack.h @@ -18,85 +18,85 @@ /* Summary: -All the apparent functions defined here are macros. The idea -is that you would use these pre-tested macros to solve a -very specific set of problems, and they would run fast. -Caution: no side-effects in arguments please!! They may be -evaluated MANY times!! - -These macros operate a stack of objects. Each object starts life -small, and may grow to maturity. (Consider building a word syllable -by syllable.) An object can move while it is growing. Once it has -been "finished" it never changes address again. So the "top of the -stack" is typically an immature growing object, while the rest of the -stack is of mature, fixed size and fixed address objects. - -These routines grab large chunks of memory, using a function you -supply, called `obstack_chunk_alloc'. On occasion, they free chunks, -by calling `obstack_chunk_free'. You must define them and declare -them before using any obstack macros. - -Each independent stack is represented by a `struct obstack'. -Each of the obstack macros expects a pointer to such a structure -as the first argument. - -One motivation for this package is the problem of growing char strings -in symbol tables. Unless you are "fascist pig with a read-only mind" ---Gosper's immortal quote from HAKMEM item 154, out of context--you -would not like to put any arbitrary upper limit on the length of your -symbols. - -In practice this often means you will build many short symbols and a -few long symbols. At the time you are reading a symbol you don't know -how long it is. One traditional method is to read a symbol into a -buffer, realloc()ating the buffer every time you try to read a symbol -that is longer than the buffer. This is beaut, but you still will -want to copy the symbol from the buffer to a more permanent -symbol-table entry say about half the time. - -With obstacks, you can work differently. Use one obstack for all symbol -names. As you read a symbol, grow the name in the obstack gradually. -When the name is complete, finalize it. Then, if the symbol exists already, -free the newly read name. - -The way we do this is to take a large chunk, allocating memory from -low addresses. When you want to build a symbol in the chunk you just -add chars above the current "high water mark" in the chunk. When you -have finished adding chars, because you got to the end of the symbol, -you know how long the chars are, and you can create a new object. -Mostly the chars will not burst over the highest address of the chunk, -because you would typically expect a chunk to be (say) 100 times as -long as an average object. - -In case that isn't clear, when we have enough chars to make up -the object, THEY ARE ALREADY CONTIGUOUS IN THE CHUNK (guaranteed) -so we just point to it where it lies. No moving of chars is -needed and this is the second win: potentially long strings need -never be explicitly shuffled. Once an object is formed, it does not -change its address during its lifetime. - -When the chars burst over a chunk boundary, we allocate a larger -chunk, and then copy the partly formed object from the end of the old -chunk to the beginning of the new larger chunk. We then carry on -accreting characters to the end of the object as we normally would. - -A special macro is provided to add a single char at a time to a -growing object. This allows the use of register variables, which -break the ordinary 'growth' macro. - -Summary: - We allocate large chunks. - We carve out one object at a time from the current chunk. - Once carved, an object never moves. - We are free to append data of any size to the currently - growing object. - Exactly one object is growing in an obstack at any one time. - You can run one obstack per control block. - You may have as many control blocks as you dare. - Because of the way we do it, you can `unwind' an obstack - back to a previous state. (You may remove objects much - as you would with a stack.) -*/ + All the apparent functions defined here are macros. The idea + is that you would use these pre-tested macros to solve a + very specific set of problems, and they would run fast. + Caution: no side-effects in arguments please!! They may be + evaluated MANY times!! + + These macros operate a stack of objects. Each object starts life + small, and may grow to maturity. (Consider building a word syllable + by syllable.) An object can move while it is growing. Once it has + been "finished" it never changes address again. So the "top of the + stack" is typically an immature growing object, while the rest of the + stack is of mature, fixed size and fixed address objects. + + These routines grab large chunks of memory, using a function you + supply, called `obstack_chunk_alloc'. On occasion, they free chunks, + by calling `obstack_chunk_free'. You must define them and declare + them before using any obstack macros. + + Each independent stack is represented by a `struct obstack'. + Each of the obstack macros expects a pointer to such a structure + as the first argument. + + One motivation for this package is the problem of growing char strings + in symbol tables. Unless you are "fascist pig with a read-only mind" + --Gosper's immortal quote from HAKMEM item 154, out of context--you + would not like to put any arbitrary upper limit on the length of your + symbols. + + In practice this often means you will build many short symbols and a + few long symbols. At the time you are reading a symbol you don't know + how long it is. One traditional method is to read a symbol into a + buffer, realloc()ating the buffer every time you try to read a symbol + that is longer than the buffer. This is beaut, but you still will + want to copy the symbol from the buffer to a more permanent + symbol-table entry say about half the time. + + With obstacks, you can work differently. Use one obstack for all symbol + names. As you read a symbol, grow the name in the obstack gradually. + When the name is complete, finalize it. Then, if the symbol exists already, + free the newly read name. + + The way we do this is to take a large chunk, allocating memory from + low addresses. When you want to build a symbol in the chunk you just + add chars above the current "high water mark" in the chunk. When you + have finished adding chars, because you got to the end of the symbol, + you know how long the chars are, and you can create a new object. + Mostly the chars will not burst over the highest address of the chunk, + because you would typically expect a chunk to be (say) 100 times as + long as an average object. + + In case that isn't clear, when we have enough chars to make up + the object, THEY ARE ALREADY CONTIGUOUS IN THE CHUNK (guaranteed) + so we just point to it where it lies. No moving of chars is + needed and this is the second win: potentially long strings need + never be explicitly shuffled. Once an object is formed, it does not + change its address during its lifetime. + + When the chars burst over a chunk boundary, we allocate a larger + chunk, and then copy the partly formed object from the end of the old + chunk to the beginning of the new larger chunk. We then carry on + accreting characters to the end of the object as we normally would. + + A special macro is provided to add a single char at a time to a + growing object. This allows the use of register variables, which + break the ordinary 'growth' macro. + + Summary: + We allocate large chunks. + We carve out one object at a time from the current chunk. + Once carved, an object never moves. + We are free to append data of any size to the currently + growing object. + Exactly one object is growing in an obstack at any one time. + You can run one obstack per control block. + You may have as many control blocks as you dare. + Because of the way we do it, you can `unwind' an obstack + back to a previous state. (You may remove objects much + as you would with a stack.) + */ /* Don't do the contents of this file more than once. */ @@ -107,7 +107,7 @@ Summary: #ifdef __cplusplus extern "C" { #endif - + /* We need the type of a pointer subtraction. If __PTRDIFF_TYPE__ is defined, as with GNU C, use that; that way we don't pollute the namespace with <stddef.h>'s symbols. Otherwise, include <stddef.h> @@ -124,7 +124,7 @@ extern "C" { aligning P to the next multiple of A + 1. B and P must be of type char *. A + 1 must be a power of 2. */ -#define __BPTR_ALIGN(B, P, A) ((B) + (((P) - (B) + (A)) & ~(A))) +#define __BPTR_ALIGN(B, P, A) ((B) + (((P) -(B) + (A)) & ~(A))) /* Similiar to _BPTR_ALIGN (B, P, A), except optimize the common case where pointers can be converted to integers, aligned as integers, @@ -133,61 +133,61 @@ extern "C" { relative to B. Otherwise, use the faster strategy of computing the alignment relative to 0. */ -#define __PTR_ALIGN(B, P, A) \ +#define __PTR_ALIGN(B, P, A) \ __BPTR_ALIGN (sizeof (PTR_INT_TYPE) < sizeof (void *) ? (B) : (char *) 0, \ - P, A) + P, A) #include <string.h> -struct _obstack_chunk /* Lives at front of each chunk. */ +struct _obstack_chunk /* Lives at front of each chunk. */ { - char *limit; /* 1 past end of this chunk */ - struct _obstack_chunk *prev; /* address of prior chunk or NULL */ - char contents[4]; /* objects begin here */ + char *limit; /* 1 past end of this chunk */ + struct _obstack_chunk *prev; /* address of prior chunk or NULL */ + char contents[4]; /* objects begin here */ }; -struct obstack /* control current object in current chunk */ +struct obstack /* control current object in current chunk */ { - long chunk_size; /* preferred size to allocate chunks in */ - struct _obstack_chunk *chunk; /* address of current struct obstack_chunk */ - char *object_base; /* address of object we are building */ - char *next_free; /* where to add next char to current object */ - char *chunk_limit; /* address of char after current chunk */ + long chunk_size; /* preferred size to allocate chunks in */ + struct _obstack_chunk *chunk; /* address of current struct obstack_chunk */ + char *object_base; /* address of object we are building */ + char *next_free; /* where to add next char to current object */ + char *chunk_limit; /* address of char after current chunk */ union { PTR_INT_TYPE tempint; void *tempptr; - } temp; /* Temporary for some macros. */ - int alignment_mask; /* Mask of alignment for each object. */ + } temp; /* Temporary for some macros. */ + int alignment_mask; /* Mask of alignment for each object. */ /* These prototypes vary based on `use_extra_arg', and we use casts to the prototypeless function type in all assignments, but having prototypes here quiets -Wstrict-prototypes. */ struct _obstack_chunk *(*chunkfun) (void *, long); void (*freefun) (void *, struct _obstack_chunk *); - void *extra_arg; /* first arg for chunk alloc/dealloc funcs */ - unsigned use_extra_arg:1; /* chunk alloc/dealloc funcs take extra arg */ - unsigned maybe_empty_object:1;/* There is a possibility that the current - chunk contains a zero-length object. This - prevents freeing the chunk if we allocate - a bigger chunk to replace it. */ - unsigned alloc_failed:1; /* No longer used, as we now call the failed - handler on error, but retained for binary - compatibility. */ + void *extra_arg; /* first arg for chunk alloc/dealloc funcs */ + unsigned use_extra_arg : 1; /* chunk alloc/dealloc funcs take extra arg */ + unsigned maybe_empty_object : 1; /* There is a possibility that the current + chunk contains a zero-length object. This + prevents freeing the chunk if we allocate + a bigger chunk to replace it. */ + unsigned alloc_failed : 1; /* No longer used, as we now call the failed + handler on error, but retained for binary + compatibility. */ }; /* Declare the external functions we use; they are in obstack.c. */ extern void _obstack_newchunk (struct obstack *, int); extern int _obstack_begin (struct obstack *, int, int, - void *(*) (long), void (*) (void *)); + void *(*)(long), void (*)(void *)); extern int _obstack_begin_1 (struct obstack *, int, int, - void *(*) (void *, long), - void (*) (void *, void *), void *); + void *(*)(void *, long), + void (*)(void *, void *), void *); extern int _obstack_memory_used (struct obstack *); void obstack_free (struct obstack *__obstack, void *__glibc_block); - + /* Error handler called when `obstack_chunk_alloc' failed to allocate more memory. This can be set to a user defined function which should either abort gracefully or use longjump - but shouldn't @@ -196,7 +196,7 @@ extern void (*obstack_alloc_failed_handler) (void); /* Exit value used when `print_and_abort' is used. */ extern int obstack_exit_failure; - + /* Pointer to beginning of object being allocated or to be allocated next. Note that this might not be the final address of the object because a new chunk might be needed to hold the final size. */ @@ -209,45 +209,45 @@ extern int obstack_exit_failure; /* Pointer to next byte not yet allocated in current chunk. */ -#define obstack_next_free(h) ((h)->next_free) +#define obstack_next_free(h) ((h)->next_free) /* Mask specifying low bits that should be clear in address of an object. */ #define obstack_alignment_mask(h) ((h)->alignment_mask) /* To prevent prototype warnings provide complete argument list. */ -#define obstack_init(h) \ - _obstack_begin ((h), 0, 0, \ - (void *(*) (long)) obstack_chunk_alloc, \ - (void (*) (void *)) obstack_chunk_free) +#define obstack_init(h) \ + _obstack_begin ((h), 0, 0, \ + (void *(*)(long))obstack_chunk_alloc, \ + (void (*)(void *))obstack_chunk_free) -#define obstack_begin(h, size) \ - _obstack_begin ((h), (size), 0, \ - (void *(*) (long)) obstack_chunk_alloc, \ - (void (*) (void *)) obstack_chunk_free) +#define obstack_begin(h, size) \ + _obstack_begin ((h), (size), 0, \ + (void *(*)(long))obstack_chunk_alloc, \ + (void (*)(void *))obstack_chunk_free) #define obstack_specify_allocation(h, size, alignment, chunkfun, freefun) \ - _obstack_begin ((h), (size), (alignment), \ - (void *(*) (long)) (chunkfun), \ - (void (*) (void *)) (freefun)) + _obstack_begin ((h), (size), (alignment), \ + (void *(*)(long))(chunkfun), \ + (void (*)(void *))(freefun)) #define obstack_specify_allocation_with_arg(h, size, alignment, chunkfun, freefun, arg) \ - _obstack_begin_1 ((h), (size), (alignment), \ - (void *(*) (void *, long)) (chunkfun), \ - (void (*) (void *, void *)) (freefun), (arg)) + _obstack_begin_1 ((h), (size), (alignment), \ + (void *(*)(void *, long))(chunkfun), \ + (void (*)(void *, void *))(freefun), (arg)) #define obstack_chunkfun(h, newchunkfun) \ - ((h) -> chunkfun = (struct _obstack_chunk *(*)(void *, long)) (newchunkfun)) + ((h)->chunkfun = (struct _obstack_chunk *(*)(void *, long))(newchunkfun)) #define obstack_freefun(h, newfreefun) \ - ((h) -> freefun = (void (*)(void *, struct _obstack_chunk *)) (newfreefun)) + ((h)->freefun = (void (*)(void *, struct _obstack_chunk *))(newfreefun)) -#define obstack_1grow_fast(h,achar) (*((h)->next_free)++ = (achar)) +#define obstack_1grow_fast(h, achar) (*((h)->next_free)++ = (achar)) -#define obstack_blank_fast(h,n) ((h)->next_free += (n)) +#define obstack_blank_fast(h, n) ((h)->next_free += (n)) #define obstack_memory_used(h) _obstack_memory_used (h) - + #if defined __GNUC__ /* NextStep 2.0 cc is really gcc 1.93 but it defines __GNUC__ = 2 and does not implement __extension__. But that compiler doesn't define @@ -261,158 +261,158 @@ extern int obstack_exit_failure; without using a global variable. Also, we can avoid using the `temp' slot, to make faster code. */ -# define obstack_object_size(OBSTACK) \ - __extension__ \ - ({ struct obstack const *__o = (OBSTACK); \ - (unsigned) (__o->next_free - __o->object_base); }) - -# define obstack_room(OBSTACK) \ - __extension__ \ - ({ struct obstack const *__o = (OBSTACK); \ - (unsigned) (__o->chunk_limit - __o->next_free); }) - -# define obstack_make_room(OBSTACK,length) \ -__extension__ \ -({ struct obstack *__o = (OBSTACK); \ - int __len = (length); \ - if (__o->chunk_limit - __o->next_free < __len) \ - _obstack_newchunk (__o, __len); \ - (void) 0; }) - -# define obstack_empty_p(OBSTACK) \ - __extension__ \ - ({ struct obstack const *__o = (OBSTACK); \ - (__o->chunk->prev == 0 \ - && __o->next_free == __PTR_ALIGN ((char *) __o->chunk, \ - __o->chunk->contents, \ - __o->alignment_mask)); }) - -# define obstack_grow(OBSTACK,where,length) \ -__extension__ \ -({ struct obstack *__o = (OBSTACK); \ - int __len = (length); \ - if (__o->next_free + __len > __o->chunk_limit) \ - _obstack_newchunk (__o, __len); \ - memcpy (__o->next_free, where, __len); \ - __o->next_free += __len; \ - (void) 0; }) - -# define obstack_grow0(OBSTACK,where,length) \ -__extension__ \ -({ struct obstack *__o = (OBSTACK); \ - int __len = (length); \ - if (__o->next_free + __len + 1 > __o->chunk_limit) \ - _obstack_newchunk (__o, __len + 1); \ - memcpy (__o->next_free, where, __len); \ - __o->next_free += __len; \ - *(__o->next_free)++ = 0; \ - (void) 0; }) - -# define obstack_1grow(OBSTACK,datum) \ -__extension__ \ -({ struct obstack *__o = (OBSTACK); \ - if (__o->next_free + 1 > __o->chunk_limit) \ - _obstack_newchunk (__o, 1); \ - obstack_1grow_fast (__o, datum); \ - (void) 0; }) +# define obstack_object_size(OBSTACK) \ + __extension__ \ + ({ struct obstack const *__o = (OBSTACK); \ + (unsigned) (__o->next_free - __o->object_base); }) + +# define obstack_room(OBSTACK) \ + __extension__ \ + ({ struct obstack const *__o = (OBSTACK); \ + (unsigned) (__o->chunk_limit - __o->next_free); }) + +# define obstack_make_room(OBSTACK, length) \ + __extension__ \ + ({ struct obstack *__o = (OBSTACK); \ + int __len = (length); \ + if (__o->chunk_limit - __o->next_free < __len) \ + _obstack_newchunk (__o, __len); \ + (void) 0; }) + +# define obstack_empty_p(OBSTACK) \ + __extension__ \ + ({ struct obstack const *__o = (OBSTACK); \ + (__o->chunk->prev == 0 \ + && __o->next_free == __PTR_ALIGN ((char *) __o->chunk, \ + __o->chunk->contents, \ + __o->alignment_mask)); }) + +# define obstack_grow(OBSTACK, where, length) \ + __extension__ \ + ({ struct obstack *__o = (OBSTACK); \ + int __len = (length); \ + if (__o->next_free + __len > __o->chunk_limit) \ + _obstack_newchunk (__o, __len); \ + memcpy (__o->next_free, where, __len); \ + __o->next_free += __len; \ + (void) 0; }) + +# define obstack_grow0(OBSTACK, where, length) \ + __extension__ \ + ({ struct obstack *__o = (OBSTACK); \ + int __len = (length); \ + if (__o->next_free + __len + 1 > __o->chunk_limit) \ + _obstack_newchunk (__o, __len + 1); \ + memcpy (__o->next_free, where, __len); \ + __o->next_free += __len; \ + *(__o->next_free)++ = 0; \ + (void) 0; }) + +# define obstack_1grow(OBSTACK, datum) \ + __extension__ \ + ({ struct obstack *__o = (OBSTACK); \ + if (__o->next_free + 1 > __o->chunk_limit) \ + _obstack_newchunk (__o, 1); \ + obstack_1grow_fast (__o, datum); \ + (void) 0; }) /* These assume that the obstack alignment is good enough for pointers or ints, and that the data added so far to the current object shares that much alignment. */ -# define obstack_ptr_grow(OBSTACK,datum) \ -__extension__ \ -({ struct obstack *__o = (OBSTACK); \ - if (__o->next_free + sizeof (void *) > __o->chunk_limit) \ - _obstack_newchunk (__o, sizeof (void *)); \ - obstack_ptr_grow_fast (__o, datum); }) \ - -# define obstack_int_grow(OBSTACK,datum) \ -__extension__ \ -({ struct obstack *__o = (OBSTACK); \ - if (__o->next_free + sizeof (int) > __o->chunk_limit) \ - _obstack_newchunk (__o, sizeof (int)); \ - obstack_int_grow_fast (__o, datum); }) - -# define obstack_ptr_grow_fast(OBSTACK,aptr) \ -__extension__ \ -({ struct obstack *__o1 = (OBSTACK); \ - *(const void **) __o1->next_free = (aptr); \ - __o1->next_free += sizeof (const void *); \ - (void) 0; }) - -# define obstack_int_grow_fast(OBSTACK,aint) \ -__extension__ \ -({ struct obstack *__o1 = (OBSTACK); \ - *(int *) __o1->next_free = (aint); \ - __o1->next_free += sizeof (int); \ - (void) 0; }) - -# define obstack_blank(OBSTACK,length) \ -__extension__ \ -({ struct obstack *__o = (OBSTACK); \ - int __len = (length); \ - if (__o->chunk_limit - __o->next_free < __len) \ - _obstack_newchunk (__o, __len); \ - obstack_blank_fast (__o, __len); \ - (void) 0; }) - -# define obstack_alloc(OBSTACK,length) \ -__extension__ \ -({ struct obstack *__h = (OBSTACK); \ - obstack_blank (__h, (length)); \ - obstack_finish (__h); }) - -# define obstack_copy(OBSTACK,where,length) \ -__extension__ \ -({ struct obstack *__h = (OBSTACK); \ - obstack_grow (__h, (where), (length)); \ - obstack_finish (__h); }) - -# define obstack_copy0(OBSTACK,where,length) \ -__extension__ \ -({ struct obstack *__h = (OBSTACK); \ - obstack_grow0 (__h, (where), (length)); \ - obstack_finish (__h); }) +# define obstack_ptr_grow(OBSTACK, datum) \ + __extension__ \ + ({ struct obstack *__o = (OBSTACK); \ + if (__o->next_free + sizeof (void *) > __o->chunk_limit) \ + _obstack_newchunk (__o, sizeof (void *)); \ + obstack_ptr_grow_fast (__o, datum); }) \ + +# define obstack_int_grow(OBSTACK, datum) \ + __extension__ \ + ({ struct obstack *__o = (OBSTACK); \ + if (__o->next_free + sizeof (int) > __o->chunk_limit) \ + _obstack_newchunk (__o, sizeof (int)); \ + obstack_int_grow_fast (__o, datum); }) + +# define obstack_ptr_grow_fast(OBSTACK, aptr) \ + __extension__ \ + ({ struct obstack *__o1 = (OBSTACK); \ + *(const void **) __o1->next_free = (aptr); \ + __o1->next_free += sizeof (const void *); \ + (void) 0; }) + +# define obstack_int_grow_fast(OBSTACK, aint) \ + __extension__ \ + ({ struct obstack *__o1 = (OBSTACK); \ + *(int *) __o1->next_free = (aint); \ + __o1->next_free += sizeof (int); \ + (void) 0; }) + +# define obstack_blank(OBSTACK, length) \ + __extension__ \ + ({ struct obstack *__o = (OBSTACK); \ + int __len = (length); \ + if (__o->chunk_limit - __o->next_free < __len) \ + _obstack_newchunk (__o, __len); \ + obstack_blank_fast (__o, __len); \ + (void) 0; }) + +# define obstack_alloc(OBSTACK, length) \ + __extension__ \ + ({ struct obstack *__h = (OBSTACK); \ + obstack_blank (__h, (length)); \ + obstack_finish (__h); }) + +# define obstack_copy(OBSTACK, where, length) \ + __extension__ \ + ({ struct obstack *__h = (OBSTACK); \ + obstack_grow (__h, (where), (length)); \ + obstack_finish (__h); }) + +# define obstack_copy0(OBSTACK, where, length) \ + __extension__ \ + ({ struct obstack *__h = (OBSTACK); \ + obstack_grow0 (__h, (where), (length)); \ + obstack_finish (__h); }) /* The local variable is named __o1 to avoid a name conflict when obstack_blank is called. */ -# define obstack_finish(OBSTACK) \ -__extension__ \ -({ struct obstack *__o1 = (OBSTACK); \ - void *__value = (void *) __o1->object_base; \ - if (__o1->next_free == __value) \ - __o1->maybe_empty_object = 1; \ - __o1->next_free \ - = __PTR_ALIGN (__o1->object_base, __o1->next_free, \ - __o1->alignment_mask); \ - if (__o1->next_free - (char *)__o1->chunk \ - > __o1->chunk_limit - (char *)__o1->chunk) \ - __o1->next_free = __o1->chunk_limit; \ - __o1->object_base = __o1->next_free; \ - __value; }) - -# define obstack_free(OBSTACK, OBJ) \ -__extension__ \ -({ struct obstack *__o = (OBSTACK); \ - void *__obj = (OBJ); \ - if (__obj > (void *)__o->chunk && __obj < (void *)__o->chunk_limit) \ - __o->next_free = __o->object_base = (char *)__obj; \ - else (obstack_free) (__o, __obj); }) - +# define obstack_finish(OBSTACK) \ + __extension__ \ + ({ struct obstack *__o1 = (OBSTACK); \ + void *__value = (void *) __o1->object_base; \ + if (__o1->next_free == __value) \ + __o1->maybe_empty_object = 1; \ + __o1->next_free \ + = __PTR_ALIGN (__o1->object_base, __o1->next_free, \ + __o1->alignment_mask); \ + if (__o1->next_free - (char *) __o1->chunk \ + > __o1->chunk_limit - (char *) __o1->chunk) \ + __o1->next_free = __o1->chunk_limit; \ + __o1->object_base = __o1->next_free; \ + __value; }) + +# define obstack_free(OBSTACK, OBJ) \ + __extension__ \ + ({ struct obstack *__o = (OBSTACK); \ + void *__obj = (OBJ); \ + if (__obj > (void *) __o->chunk && __obj < (void *) __o->chunk_limit) \ + __o->next_free = __o->object_base = (char *) __obj; \ + else (obstack_free) (__o, __obj); }) + #else /* not __GNUC__ */ # define obstack_object_size(h) \ - (unsigned) ((h)->next_free - (h)->object_base) + (unsigned) ((h)->next_free - (h)->object_base) -# define obstack_room(h) \ - (unsigned) ((h)->chunk_limit - (h)->next_free) +# define obstack_room(h) \ + (unsigned) ((h)->chunk_limit - (h)->next_free) # define obstack_empty_p(h) \ - ((h)->chunk->prev == 0 \ - && (h)->next_free == __PTR_ALIGN ((char *) (h)->chunk, \ - (h)->chunk->contents, \ - (h)->alignment_mask)) + ((h)->chunk->prev == 0 \ + && (h)->next_free == __PTR_ALIGN ((char *) (h)->chunk, \ + (h)->chunk->contents, \ + (h)->alignment_mask)) /* Note that the call to _obstack_newchunk is enclosed in (..., 0) so that we can avoid having void expressions @@ -420,88 +420,86 @@ __extension__ \ Casting the third operand to void was tried before, but some compilers won't accept it. */ -# define obstack_make_room(h,length) \ -( (h)->temp.tempint = (length), \ - (((h)->next_free + (h)->temp.tempint > (h)->chunk_limit) \ +# define obstack_make_room(h, length) \ + ((h)->temp.tempint = (length), \ + (((h)->next_free + (h)->temp.tempint > (h)->chunk_limit) \ ? (_obstack_newchunk ((h), (h)->temp.tempint), 0) : 0)) -# define obstack_grow(h,where,length) \ -( (h)->temp.tempint = (length), \ - (((h)->next_free + (h)->temp.tempint > (h)->chunk_limit) \ - ? (_obstack_newchunk ((h), (h)->temp.tempint), 0) : 0), \ - memcpy ((h)->next_free, where, (h)->temp.tempint), \ - (h)->next_free += (h)->temp.tempint) - -# define obstack_grow0(h,where,length) \ -( (h)->temp.tempint = (length), \ - (((h)->next_free + (h)->temp.tempint + 1 > (h)->chunk_limit) \ - ? (_obstack_newchunk ((h), (h)->temp.tempint + 1), 0) : 0), \ - memcpy ((h)->next_free, where, (h)->temp.tempint), \ - (h)->next_free += (h)->temp.tempint, \ - *((h)->next_free)++ = 0) - -# define obstack_1grow(h,datum) \ -( (((h)->next_free + 1 > (h)->chunk_limit) \ - ? (_obstack_newchunk ((h), 1), 0) : 0), \ - obstack_1grow_fast (h, datum)) - -# define obstack_ptr_grow(h,datum) \ -( (((h)->next_free + sizeof (char *) > (h)->chunk_limit) \ - ? (_obstack_newchunk ((h), sizeof (char *)), 0) : 0), \ - obstack_ptr_grow_fast (h, datum)) - -# define obstack_int_grow(h,datum) \ -( (((h)->next_free + sizeof (int) > (h)->chunk_limit) \ - ? (_obstack_newchunk ((h), sizeof (int)), 0) : 0), \ - obstack_int_grow_fast (h, datum)) - -# define obstack_ptr_grow_fast(h,aptr) \ +# define obstack_grow(h, where, length) \ + ((h)->temp.tempint = (length), \ + (((h)->next_free + (h)->temp.tempint > (h)->chunk_limit) \ + ? (_obstack_newchunk ((h), (h)->temp.tempint), 0) : 0), \ + memcpy ((h)->next_free, where, (h)->temp.tempint), \ + (h)->next_free += (h)->temp.tempint) + +# define obstack_grow0(h, where, length) \ + ((h)->temp.tempint = (length), \ + (((h)->next_free + (h)->temp.tempint + 1 > (h)->chunk_limit) \ + ? (_obstack_newchunk ((h), (h)->temp.tempint + 1), 0) : 0), \ + memcpy ((h)->next_free, where, (h)->temp.tempint), \ + (h)->next_free += (h)->temp.tempint, \ + *((h)->next_free)++ = 0) + +# define obstack_1grow(h, datum) \ + ((((h)->next_free + 1 > (h)->chunk_limit) \ + ? (_obstack_newchunk ((h), 1), 0) : 0), \ + obstack_1grow_fast (h, datum)) + +# define obstack_ptr_grow(h, datum) \ + ((((h)->next_free + sizeof (char *) > (h)->chunk_limit) \ + ? (_obstack_newchunk ((h), sizeof (char *)), 0) : 0), \ + obstack_ptr_grow_fast (h, datum)) + +# define obstack_int_grow(h, datum) \ + ((((h)->next_free + sizeof (int) > (h)->chunk_limit) \ + ? (_obstack_newchunk ((h), sizeof (int)), 0) : 0), \ + obstack_int_grow_fast (h, datum)) + +# define obstack_ptr_grow_fast(h, aptr) \ (((const void **) ((h)->next_free += sizeof (void *)))[-1] = (aptr)) -# define obstack_int_grow_fast(h,aint) \ +# define obstack_int_grow_fast(h, aint) \ (((int *) ((h)->next_free += sizeof (int)))[-1] = (aint)) -# define obstack_blank(h,length) \ -( (h)->temp.tempint = (length), \ - (((h)->chunk_limit - (h)->next_free < (h)->temp.tempint) \ - ? (_obstack_newchunk ((h), (h)->temp.tempint), 0) : 0), \ - obstack_blank_fast (h, (h)->temp.tempint)) - -# define obstack_alloc(h,length) \ - (obstack_blank ((h), (length)), obstack_finish ((h))) - -# define obstack_copy(h,where,length) \ - (obstack_grow ((h), (where), (length)), obstack_finish ((h))) - -# define obstack_copy0(h,where,length) \ - (obstack_grow0 ((h), (where), (length)), obstack_finish ((h))) - -# define obstack_finish(h) \ -( ((h)->next_free == (h)->object_base \ - ? (((h)->maybe_empty_object = 1), 0) \ - : 0), \ - (h)->temp.tempptr = (h)->object_base, \ - (h)->next_free \ - = __PTR_ALIGN ((h)->object_base, (h)->next_free, \ - (h)->alignment_mask), \ - (((h)->next_free - (char *) (h)->chunk \ - > (h)->chunk_limit - (char *) (h)->chunk) \ - ? ((h)->next_free = (h)->chunk_limit) : 0), \ - (h)->object_base = (h)->next_free, \ - (h)->temp.tempptr) - -# define obstack_free(h,obj) \ -( (h)->temp.tempint = (char *) (obj) - (char *) (h)->chunk, \ - ((((h)->temp.tempint > 0 \ - && (h)->temp.tempint < (h)->chunk_limit - (char *) (h)->chunk)) \ - ? (((h)->next_free = (h)->object_base \ - = (h)->temp.tempint + (char *) (h)->chunk), 0) \ +# define obstack_blank(h, length) \ + ((h)->temp.tempint = (length), \ + (((h)->chunk_limit - (h)->next_free < (h)->temp.tempint) \ + ? (_obstack_newchunk ((h), (h)->temp.tempint), 0) : 0), \ + obstack_blank_fast (h, (h)->temp.tempint)) + +# define obstack_alloc(h, length) \ + (obstack_blank ((h), (length)), obstack_finish ((h))) + +# define obstack_copy(h, where, length) \ + (obstack_grow ((h), (where), (length)), obstack_finish ((h))) + +# define obstack_copy0(h, where, length) \ + (obstack_grow0 ((h), (where), (length)), obstack_finish ((h))) + +# define obstack_finish(h) \ + (((h)->next_free == (h)->object_base \ + ? (((h)->maybe_empty_object = 1), 0) \ + : 0), \ + (h)->temp.tempptr = (h)->object_base, \ + (h)->next_free \ + = __PTR_ALIGN ((h)->object_base, (h)->next_free, \ + (h)->alignment_mask), \ + (((h)->next_free - (char *) (h)->chunk \ + > (h)->chunk_limit - (char *) (h)->chunk) \ + ? ((h)->next_free = (h)->chunk_limit) : 0), \ + (h)->object_base = (h)->next_free, \ + (h)->temp.tempptr) + +# define obstack_free(h, obj) \ + ((h)->temp.tempint = (char *) (obj) - (char *) (h)->chunk, \ + ((((h)->temp.tempint > 0 \ + && (h)->temp.tempint < (h)->chunk_limit - (char *) (h)->chunk)) \ + ? (((h)->next_free = (h)->object_base \ + = (h)->temp.tempint + (char *) (h)->chunk), 0) \ : ((obstack_free) ((h), (h)->temp.tempint + (char *) (h)->chunk), 0))) - #endif /* not __GNUC__ */ #ifdef __cplusplus -} /* C++ */ +} /* C++ */ #endif - #endif /* obstack.h */ diff --git a/malloc/set-freeres.c b/malloc/set-freeres.c index 6c9a941..fdecc1c 100644 --- a/malloc/set-freeres.c +++ b/malloc/set-freeres.c @@ -33,17 +33,17 @@ __libc_freeres (void) protect for multiple executions since these are fatal. */ static long int already_called; - if (! atomic_compare_and_exchange_bool_acq (&already_called, 1, 0)) + if (!atomic_compare_and_exchange_bool_acq (&already_called, 1, 0)) { - void * const *p; + void *const *p; _IO_cleanup (); RUN_HOOK (__libc_subfreeres, ()); for (p = symbol_set_first_element (__libc_freeres_ptrs); - ! symbol_set_end_p (__libc_freeres_ptrs, p); ++p) - free (*p); + !symbol_set_end_p (__libc_freeres_ptrs, p); ++p) + free (*p); } } libc_hidden_def (__libc_freeres) diff --git a/malloc/tst-mallocstate.c b/malloc/tst-mallocstate.c index 2b7c59b..69c4500 100644 --- a/malloc/tst-mallocstate.c +++ b/malloc/tst-mallocstate.c @@ -48,19 +48,19 @@ main (void) free (malloc (10)); - for (i=0; i<100; ++i) + for (i = 0; i < 100; ++i) { save_state = malloc_get_state (); if (save_state == NULL) - { - merror ("malloc_get_state () failed."); - break; - } + { + merror ("malloc_get_state () failed."); + break; + } /*free (malloc (10)); This could change the top chunk! */ malloc_set_state (save_state); - p1 = realloc (p1, i*4 + 4); + p1 = realloc (p1, i * 4 + 4); if (p1 == NULL) - merror ("realloc (i*4) failed."); + merror ("realloc (i*4) failed."); free (save_state); } diff --git a/malloc/tst-mtrace.c b/malloc/tst-mtrace.c index e750bc8..9b5151c 100644 --- a/malloc/tst-mtrace.c +++ b/malloc/tst-mtrace.c @@ -55,20 +55,20 @@ main (void) ssize_t n = getline (&line, &linelen, fp); if (n < 0) - break; + break; if (n == 0) - continue; + continue; copy = strdup (line); if (copy == NULL) - abort (); + abort (); p = (char **) tsearch (copy, &root, - (int (*) (const void *, const void *)) strcmp); + (int (*)(const void *, const void *))strcmp); if (*p != copy) - /* This line wasn't added. */ - free (copy); + /* This line wasn't added. */ + free (copy); } fclose (fp); diff --git a/malloc/tst-realloc.c b/malloc/tst-realloc.c index 458f16f..dc5fc3d 100644 --- a/malloc/tst-realloc.c +++ b/malloc/tst-realloc.c @@ -79,11 +79,11 @@ do_test (void) for (i = 0; i < 20; i++) { if (c[i] != 0) - ok = 0; + ok = 0; } if (ok == 0) - merror ("first 20 bytes were not cleared"); + merror ("first 20 bytes were not cleared"); free (p); @@ -104,11 +104,11 @@ do_test (void) for (i = 0; i < 16; i++) { if (c[i] != 0xff) - ok = 0; + ok = 0; } if (ok == 0) - merror ("first 16 bytes were not correct"); + merror ("first 16 bytes were not correct"); /* Check failed realloc leaves original untouched (C89). */ c = realloc (p, -1); @@ -121,11 +121,11 @@ do_test (void) for (i = 0; i < 16; i++) { if (c[i] != 0xff) - ok = 0; + ok = 0; } if (ok == 0) - merror ("first 16 bytes were not correct after failed realloc"); + merror ("first 16 bytes were not correct after failed realloc"); /* realloc (p, 0) frees p (C89) and returns NULL (glibc). */ p = realloc (p, 0); |