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Make POSIX threads improvements

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- Ensure SIGTHR isn't blocked in newly created threads
- Use TIB rather than thread_local for thread atexits
- Make POSIX thread keys atomic within thread
- Don't bother logging prctl() to --strace
- Log thread destructor names to --strace
This commit is contained in:
Justine Tunney 2024-06-30 15:38:59 -07:00
parent 387310c659
commit 76957983cf
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GPG key ID: BE714B4575D6E328
11 changed files with 57 additions and 71 deletions
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6
libc/thread/pthread_key_create.c
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@ -48,9 +48,9 @@ int pthread_key_create(pthread_key_t *key, pthread_key_dtor dtor) {
if (!dtor)
dtor = (pthread_key_dtor)-1;
for (i = 0; i < PTHREAD_KEYS_MAX; ++i) {
if (!(expect = atomic_load_explicit(_pthread_key_dtor + i,
memory_order_acquire)) &&
atomic_compare_exchange_strong_explicit(_pthread_key_dtor + i, &expect,
if (!(expect = atomic_load_explicit(&_pthread_key_dtor[i],
memory_order_relaxed)) &&
atomic_compare_exchange_strong_explicit(&_pthread_key_dtor[i], &expect,
dtor, memory_order_release,
memory_order_relaxed)) {
*key = i;