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authorUlrich Drepper <drepper@redhat.com>2001-06-26 03:14:04 +0000
committerUlrich Drepper <drepper@redhat.com>2001-06-26 03:14:04 +0000
commitd8f00d4669ecd16dfb7e52757cccf6bf2f5facbe (patch)
tree3785690bd4b7fa96422b32517e7b29161e40d83a /malloc
parentdebe38f2129576a9478b2b7444d03929e6ec00b4 (diff)
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Update.
2001-06-22 Jakub Jelinek <jakub@redhat.com> * posix/regex.c (regex_compile, re_match_2_internal): Fix comment typos. 2001-06-01 Wolfram Gloger <wg@malloc.de> * malloc/malloc.c (malloc_atfork, free_atfork): Use a unique value ATFORK_ARENA_PTR, not 0, for the thread-specific arena pointer when malloc_atfork is in use.
Diffstat (limited to 'malloc')
-rw-r--r--malloc/malloc.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c
index a9541b9..c0f70af 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -1595,6 +1595,11 @@ int __malloc_initialized = -1;
#ifndef NO_THREADS
+/* Magic value for the thread-specific arena pointer when
+ malloc_atfork() is in use. */
+
+#define ATFORK_ARENA_PTR ((Void_t*)-1)
+
/* The following two functions are registered via thread_atfork() to
make sure that the mutexes remain in a consistent state in the
fork()ed version of a thread. Also adapt the malloc and free hooks
@@ -1627,7 +1632,7 @@ ptmalloc_lock_all __MALLOC_P((void))
__free_hook = free_atfork;
/* Only the current thread may perform malloc/free calls now. */
tsd_getspecific(arena_key, save_arena);
- tsd_setspecific(arena_key, (Void_t*)0);
+ tsd_setspecific(arena_key, ATFORK_ARENA_PTR);
#endif
}
@@ -4169,6 +4174,8 @@ struct mallinfo mALLINFo()
#ifndef NO_THREADS
tsd_getspecific(arena_key, vptr);
+ if(vptr == ATFORK_ARENA_PTR)
+ vptr = (Void_t*)&main_arena;
#endif
malloc_update_mallinfo((vptr ? (arena*)vptr : &main_arena), &mi);
return mi;
@@ -4724,7 +4731,8 @@ malloc_atfork(sz, caller) size_t sz; const Void_t *caller;
mchunkptr victim;
tsd_getspecific(arena_key, vptr);
- if(!vptr) {
+ if(vptr == ATFORK_ARENA_PTR) {
+ /* We are the only thread that may allocate at all. */
if(save_malloc_hook != malloc_check) {
if(request2size(sz, nb))
return 0;
@@ -4772,10 +4780,10 @@ free_atfork(mem, caller) Void_t* mem; const Void_t *caller;
ar_ptr = arena_for_ptr(p);
tsd_getspecific(arena_key, vptr);
- if(vptr)
+ if(vptr != ATFORK_ARENA_PTR)
(void)mutex_lock(&ar_ptr->mutex);
chunk_free(ar_ptr, p);
- if(vptr)
+ if(vptr != ATFORK_ARENA_PTR)
(void)mutex_unlock(&ar_ptr->mutex);
}