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In function __pthread_cxa_finalize(), also make code for removing

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atfork handler be async-signal safe.
This commit is contained in:
David Xu 2010-09-01 07:09:46 +00:00
parent 901c71c704
commit 12c61c22ce
1 changed files with 8 additions and 1 deletions
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9
lib/libthr/thread/thr_fork.c
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@ -100,22 +100,29 @@ _pthread_atfork(void (*prepare)(void), void (*parent)(void),
void
__pthread_cxa_finalize(struct dl_phdr_info *phdr_info)
{
atfork_head temp_list = TAILQ_HEAD_INITIALIZER(temp_list);
struct pthread *curthread;
struct pthread_atfork *af, *af1;
_thr_check_init();
curthread = _get_curthread();
THR_CRITICAL_ENTER(curthread);
_thr_rwl_wrlock(&_thr_atfork_lock);
TAILQ_FOREACH_SAFE(af, &_thr_atfork_list, qe, af1) {
if (__elf_phdr_match_addr(phdr_info, af->prepare) ||
__elf_phdr_match_addr(phdr_info, af->parent) ||
__elf_phdr_match_addr(phdr_info, af->child)) {
TAILQ_REMOVE(&_thr_atfork_list, af, qe);
free(af);
TAILQ_INSERT_TAIL(&temp_list, af, qe);
}
}
_thr_rwl_unlock(&_thr_atfork_lock);
THR_CRITICAL_LEAVE(curthread);
while ((af = TAILQ_FIRST(&temp_list)) != NULL) {
TAILQ_REMOVE(&temp_list, af, qe);
free(af);
}
_thr_tsd_unload(phdr_info);
_thr_sigact_unload(phdr_info);
}