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Make more improvements to threading support

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- fix rare thread exit race condition on openbsd
- pthread_getattr_np() now supplies detached status
- child threads may now pthread_join() the main thread
- introduce sigandset(), sigorset(), and sigisemptyset()
- introduce pthread_cleanup_push() and pthread_cleanup_pop()
This commit is contained in:
Justine Tunney 2022-10-08 23:54:05 -07:00
parent 38df0a4186
commit 4a6fd3d910
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GPG key ID: BE714B4575D6E328
52 changed files with 586 additions and 241 deletions
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97
test/libc/thread/pthread_create_test.c
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@ -16,13 +16,14 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/atomic.h"
#include "libc/calls/calls.h"
#include "libc/calls/struct/sched_param.h"
#include "libc/calls/struct/sigaction.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/kprintf.h"
#include "libc/macros.internal.h"
#include "libc/mem/gc.h"
#include "libc/mem/mem.h"
#include "libc/nexgen32e/nexgen32e.h"
#include "libc/runtime/runtime.h"
@ -48,7 +49,6 @@ void SetUp(void) {
void TriggerSignal(void) {
sched_yield();
/* kprintf("raising at %p\n", __builtin_frame_address(0)); */
raise(SIGUSR1);
sched_yield();
}
@ -183,19 +183,90 @@ TEST(pthread_detach, testCustomStack_withReallySmallSize) {
free(stk);
}
TEST(pthread_exit, mainThreadWorks) {
// _Exit1() can't set process exit code on XNU/NetBSD/OpenBSD.
if (IsLinux() || IsFreebsd() || IsWindows()) {
SPAWN(fork);
pthread_exit((void *)2);
EXITS(2);
} else {
SPAWN(fork);
pthread_exit((void *)0);
EXITS(0);
}
void *JoinMainWorker(void *arg) {
void *rc;
pthread_t main_thread = (pthread_t)arg;
_gc(malloc(32));
_gc(malloc(32));
ASSERT_EQ(0, pthread_join(main_thread, &rc));
ASSERT_EQ(123, (intptr_t)rc);
return 0;
}
TEST(pthread_join, mainThread) {
pthread_t id;
_gc(malloc(32));
_gc(malloc(32));
SPAWN(fork);
ASSERT_EQ(0, pthread_create(&id, 0, JoinMainWorker, (void *)pthread_self()));
pthread_exit((void *)123);
EXITS(0);
}
TEST(pthread_join, mainThreadDelayed) {
pthread_t id;
_gc(malloc(32));
_gc(malloc(32));
SPAWN(fork);
ASSERT_EQ(0, pthread_create(&id, 0, JoinMainWorker, (void *)pthread_self()));
usleep(10000);
pthread_exit((void *)123);
EXITS(0);
}
TEST(pthread_exit, fromMainThread_whenNoThreadsWereCreated) {
SPAWN(fork);
pthread_exit((void *)123);
EXITS(0);
}
atomic_bool g_cleanup1;
atomic_bool g_cleanup2;
void OnCleanup(void *arg) {
*(atomic_bool *)arg = true;
}
void *CleanupExit(void *arg) {
pthread_cleanup_push(OnCleanup, &g_cleanup1);
pthread_cleanup_push(OnCleanup, &g_cleanup2);
pthread_cleanup_pop(false);
pthread_exit(0);
pthread_cleanup_pop(false);
return 0;
}
TEST(pthread_cleanup, pthread_exit_alwaysCallsCallback) {
pthread_t id;
g_cleanup1 = false;
g_cleanup2 = false;
ASSERT_EQ(0, pthread_create(&id, 0, CleanupExit, 0));
ASSERT_EQ(0, pthread_join(id, 0));
ASSERT_TRUE(g_cleanup1);
ASSERT_FALSE(g_cleanup2);
}
void *CleanupNormal(void *arg) {
pthread_cleanup_push(OnCleanup, &g_cleanup1);
pthread_cleanup_push(OnCleanup, &g_cleanup2);
pthread_cleanup_pop(true);
pthread_cleanup_pop(true);
return 0;
}
TEST(pthread_cleanup, pthread_normal) {
pthread_t id;
g_cleanup1 = false;
g_cleanup2 = false;
ASSERT_EQ(0, pthread_create(&id, 0, CleanupNormal, 0));
ASSERT_EQ(0, pthread_join(id, 0));
ASSERT_TRUE(g_cleanup1);
ASSERT_TRUE(g_cleanup2);
}
////////////////////////////////////////////////////////////////////////////////
// BENCHMARKS
static void CreateJoin(void) {
pthread_t id;
ASSERT_EQ(0, pthread_create(&id, 0, Increment, 0));