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Make detached threads work better

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This change adds a double linked list of threads, so that pthread_exit()
will know when it should call exit() from an orphaned child. This change
also improves ftrace and strace logging.
This commit is contained in:
Justine Tunney 2022-11-09 03:58:57 -08:00
parent b74d8c1acd
commit cee6871710
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GPG key ID: BE714B4575D6E328
37 changed files with 638 additions and 314 deletions
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19
libc/intrin/pthread_key_delete.c
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@ -16,6 +16,7 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/errno.h"
#include "libc/intrin/atomic.h"
#include "libc/thread/posixthread.internal.h"
@ -24,16 +25,18 @@
/**
* Deletes TLS slot.
*
* This function should only be called if all threads have finished
* using the key registration. If a key is used after being deleted
* then the behavior is undefined. If `k` was not registered by the
* pthread_key_create() function then the behavior is undefined.
*
* @param key was created by pthread_key_create()
* @return 0 on success, or errno on error
* @raise EINVAL if `key` isn't valid
*/
int pthread_key_delete(pthread_key_t key) {
int pthread_key_delete(pthread_key_t k) {
uint64_t mask;
if (key < PTHREAD_KEYS_MAX) {
atomic_store_explicit(_pthread_key_dtor + key, 0, memory_order_relaxed);
return 0;
} else {
return EINVAL;
}
_unassert(0 <= k && k < PTHREAD_KEYS_MAX);
_unassert(atomic_load_explicit(_pthread_key_dtor + k, memory_order_acquire));
atomic_store_explicit(_pthread_key_dtor + k, 0, memory_order_release);
return 0;
}