project-base/server-skynet-source-3rd-jemalloc
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Only abort on dlsym when necessary.

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If neither background_thread nor lazy_lock is in use, do not abort on dlsym
errors.
This commit is contained in:
Qi Wang 2017-06-14 12:12:23 -07:00 committed by Qi Wang
parent bdcf40a620
commit a4d6fe73cf
3 changed files with 19 additions and 3 deletions
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1
include/jemalloc/internal/background_thread_externs.h
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@ -6,6 +6,7 @@ extern malloc_mutex_t background_thread_lock;
extern atomic_b_t background_thread_enabled_state;
extern size_t n_background_threads;
extern background_thread_info_t *background_thread_info;
extern bool can_enable_background_thread;
bool background_thread_create(tsd_t *tsd, unsigned arena_ind);
bool background_threads_enable(tsd_t *tsd);

14
src/background_thread.c
View File

@ -20,6 +20,9 @@ size_t n_background_threads;
/* Thread info per-index. */
background_thread_info_t *background_thread_info;
/* False if no necessary runtime support. */
bool can_enable_background_thread;
/******************************************************************************/
#ifdef JEMALLOC_PTHREAD_CREATE_WRAPPER
@ -785,9 +788,14 @@ background_thread_boot0(void) {
#ifdef JEMALLOC_PTHREAD_CREATE_WRAPPER
pthread_create_fptr = dlsym(RTLD_NEXT, "pthread_create");
if (pthread_create_fptr == NULL) {
malloc_write("<jemalloc>: Error in dlsym(RTLD_NEXT, "
"\"pthread_create\")\n");
abort();
can_enable_background_thread = false;
if (config_lazy_lock || opt_background_thread) {
malloc_write("<jemalloc>: Error in dlsym(RTLD_NEXT, "
"\"pthread_create\")\n");
abort();
}
} else {
can_enable_background_thread = true;
}
#endif
return false;

7
src/ctl.c
View File

@ -1522,6 +1522,13 @@ background_thread_ctl(tsd_t *tsd, const size_t *mib, size_t miblen,
background_thread_enabled_set(tsd_tsdn(tsd), newval);
if (newval) {
if (!can_enable_background_thread) {
malloc_printf("<jemalloc>: Error in dlsym("
"RTLD_NEXT, \"pthread_create\"). Cannot "
"enable background_thread\n");
ret = EFAULT;
goto label_return;
}
if (background_threads_enable(tsd)) {
ret = EFAULT;
goto label_return;