diff options
Diffstat (limited to 'malloc/malloc.c')
| -rw-r--r-- | malloc/malloc.c | 135 |
1 files changed, 26 insertions, 109 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c index 897c43a..0181717 100644 --- a/malloc/malloc.c +++ b/malloc/malloc.c @@ -1054,8 +1054,8 @@ static void _int_free(mstate, mchunkptr, int); static void* _int_realloc(mstate, mchunkptr, INTERNAL_SIZE_T, INTERNAL_SIZE_T); static void* _int_memalign(mstate, size_t, size_t); -static void* _int_valloc(mstate, size_t); -static void* _int_pvalloc(mstate, size_t); +static void* _mid_memalign(size_t, size_t, void *); + static void malloc_printerr(int action, const char *str, void *ptr); static void* internal_function mem2mem_check(void *p, size_t sz); @@ -3002,15 +3002,22 @@ libc_hidden_def (__libc_realloc) void* __libc_memalign(size_t alignment, size_t bytes) { + void *address = RETURN_ADDRESS (0); + return _mid_memalign (alignment, bytes, address); +} + +static void * +_mid_memalign (size_t alignment, size_t bytes, void *address) +{ mstate ar_ptr; void *p; void *(*hook) (size_t, size_t, const void *) = force_reg (__memalign_hook); if (__builtin_expect (hook != NULL, 0)) - return (*hook)(alignment, bytes, RETURN_ADDRESS (0)); + return (*hook)(alignment, bytes, address); - /* If need less alignment than we give anyway, just relay to malloc */ + /* If we need less alignment than we give anyway, just relay to malloc. */ if (alignment <= MALLOC_ALIGNMENT) return __libc_malloc(bytes); /* Otherwise, ensure that it is at least a minimum chunk size */ @@ -3031,6 +3038,14 @@ __libc_memalign(size_t alignment, size_t bytes) return 0; } + + /* Make sure alignment is power of 2. */ + 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) return 0; @@ -3055,54 +3070,22 @@ libc_hidden_def (__libc_memalign) void* __libc_valloc(size_t bytes) { - mstate ar_ptr; - void *p; - if(__malloc_initialized < 0) ptmalloc_init (); + void *address = RETURN_ADDRESS (0); size_t pagesz = GLRO(dl_pagesize); - - /* Check for overflow. */ - if (bytes > SIZE_MAX - pagesz - MINSIZE) - { - __set_errno (ENOMEM); - return 0; - } - - void *(*hook) (size_t, size_t, const void *) = - force_reg (__memalign_hook); - if (__builtin_expect (hook != NULL, 0)) - return (*hook)(pagesz, bytes, RETURN_ADDRESS (0)); - - arena_get(ar_ptr, bytes + pagesz + MINSIZE); - if(!ar_ptr) - return 0; - p = _int_valloc(ar_ptr, bytes); - if(!p) { - LIBC_PROBE (memory_valloc_retry, 1, bytes); - ar_ptr = arena_get_retry (ar_ptr, bytes); - if (__builtin_expect(ar_ptr != NULL, 1)) { - p = _int_memalign(ar_ptr, pagesz, 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))); - - return p; + return _mid_memalign (pagesz, bytes, address); } void* __libc_pvalloc(size_t bytes) { - mstate ar_ptr; - void *p; 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 rounded_bytes = (bytes + page_mask) & ~(page_mask); @@ -3114,26 +3097,7 @@ __libc_pvalloc(size_t bytes) return 0; } - void *(*hook) (size_t, size_t, const void *) = - force_reg (__memalign_hook); - if (__builtin_expect (hook != NULL, 0)) - return (*hook)(pagesz, rounded_bytes, RETURN_ADDRESS (0)); - - arena_get(ar_ptr, bytes + 2*pagesz + MINSIZE); - p = _int_pvalloc(ar_ptr, bytes); - if(!p) { - LIBC_PROBE (memory_pvalloc_retry, 1, bytes); - ar_ptr = arena_get_retry (ar_ptr, bytes + 2*pagesz + MINSIZE); - if (__builtin_expect(ar_ptr != NULL, 1)) { - p = _int_memalign(ar_ptr, pagesz, rounded_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))); - - return p; + return _mid_memalign (pagesz, rounded_bytes, address); } void* @@ -4318,20 +4282,7 @@ _int_memalign(mstate av, size_t alignment, size_t bytes) unsigned long remainder_size; /* its size */ INTERNAL_SIZE_T size; - /* If need less alignment than we give anyway, just relay to malloc */ - if (alignment <= MALLOC_ALIGNMENT) return _int_malloc(av, bytes); - - /* Otherwise, ensure that it is at least a minimum chunk size */ - - if (alignment < MINSIZE) alignment = MINSIZE; - - /* Make sure alignment is power of 2 (in case MINSIZE is not). */ - if ((alignment & (alignment - 1)) != 0) { - size_t a = MALLOC_ALIGNMENT * 2; - while ((unsigned long)a < (unsigned long)alignment) a <<= 1; - alignment = a; - } checked_request2size(bytes, nb); @@ -4406,35 +4357,6 @@ _int_memalign(mstate av, size_t alignment, size_t bytes) /* - ------------------------------ valloc ------------------------------ -*/ - -static void* -_int_valloc(mstate av, size_t bytes) -{ - /* Ensure initialization/consolidation */ - if (have_fastchunks(av)) malloc_consolidate(av); - return _int_memalign(av, GLRO(dl_pagesize), bytes); -} - -/* - ------------------------------ pvalloc ------------------------------ -*/ - - -static void* -_int_pvalloc(mstate av, size_t bytes) -{ - size_t pagesz; - - /* Ensure initialization/consolidation */ - if (have_fastchunks(av)) malloc_consolidate(av); - pagesz = GLRO(dl_pagesize); - return _int_memalign(av, pagesz, (bytes + pagesz - 1) & ~(pagesz - 1)); -} - - -/* ------------------------------ malloc_trim ------------------------------ */ @@ -4968,14 +4890,9 @@ __posix_memalign (void **memptr, size_t alignment, size_t size) || alignment == 0) return EINVAL; - /* Call the hook here, so that caller is posix_memalign's caller - and not posix_memalign itself. */ - void *(*hook) (size_t, size_t, const void *) = - force_reg (__memalign_hook); - if (__builtin_expect (hook != NULL, 0)) - mem = (*hook)(alignment, size, RETURN_ADDRESS (0)); - else - mem = __libc_memalign (alignment, size); + + void *address = RETURN_ADDRESS (0); + mem = _mid_memalign (alignment, size, address); if (mem != NULL) { *memptr = mem; |