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Fall back to the default pthread_create if RTLD_NEXT fails.

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This commit is contained in:
Qi Wang 2018-06-06 15:52:52 -07:00 committed by Qi Wang
parent d1e11d48d4
commit 77a71ef2b7
3 changed files with 9 additions and 22 deletions
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1
include/jemalloc/internal/background_thread_externs.h
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@ -8,7 +8,6 @@ extern atomic_b_t background_thread_enabled_state;
extern size_t n_background_threads;
extern size_t max_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);

16
src/background_thread.c
View File

@ -22,9 +22,6 @@ size_t max_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
@ -812,16 +809,21 @@ pthread_create_fptr_init(void) {
if (pthread_create_fptr != NULL) {
return false;
}
/*
* Try the next symbol first, because 1) when use lazy_lock we have a
* wrapper for pthread_create; and 2) application may define its own
* wrapper as well (and can call malloc within the wrapper).
*/
pthread_create_fptr = dlsym(RTLD_NEXT, "pthread_create");
if (pthread_create_fptr == NULL) {
can_enable_background_thread = false;
if (config_lazy_lock || opt_background_thread) {
if (config_lazy_lock) {
malloc_write("<jemalloc>: Error in dlsym(RTLD_NEXT, "
"\"pthread_create\")\n");
abort();
} else {
/* Fall back to the default symbol. */
pthread_create_fptr = pthread_create;
}
} else {
can_enable_background_thread = true;
}
return false;

14
src/ctl.c
View File

@ -1556,13 +1556,6 @@ 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;
@ -1617,13 +1610,6 @@ max_background_threads_ctl(tsd_t *tsd, const size_t *mib, size_t miblen,
}
if (background_thread_enabled()) {
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;
}
background_thread_enabled_set(tsd_tsdn(tsd), false);
if (background_threads_disable(tsd)) {
ret = EFAULT;