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Make futexes cancellable by pthreads

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This commit is contained in:
Justine Tunney 2022-11-04 18:19:05 -07:00
parent 2278327eba
commit 022536cab6
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GPG key ID: BE714B4575D6E328
101 changed files with 627 additions and 391 deletions
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105
test/libc/thread/pthread_cancel_test.c
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@ -24,8 +24,11 @@
#include "libc/runtime/runtime.h"
#include "libc/testlib/testlib.h"
#include "libc/thread/thread.h"
#include "libc/thread/thread2.h"
int pfds[2];
pthread_cond_t cv;
pthread_mutex_t mu;
atomic_bool gotcleanup;
char testlib_enable_tmp_setup_teardown;
@ -37,6 +40,49 @@ void OnCleanup(void *arg) {
gotcleanup = true;
}
void *CancelSelfWorkerDeferred(void *arg) {
char buf[8];
pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, 0);
pthread_cleanup_push(OnCleanup, 0);
pthread_cancel(pthread_self());
read(pfds[0], buf, sizeof(buf));
pthread_cleanup_pop(0);
return 0;
}
TEST(pthread_cancel, self_deferred_waitsForCancellationPoint) {
void *rc;
pthread_t th;
ASSERT_SYS(0, 0, pipe(pfds));
ASSERT_EQ(0, pthread_create(&th, 0, CancelSelfWorkerDeferred, 0));
ASSERT_EQ(0, pthread_join(th, &rc));
ASSERT_EQ(PTHREAD_CANCELED, rc);
ASSERT_TRUE(gotcleanup);
ASSERT_SYS(0, 0, close(pfds[1]));
ASSERT_SYS(0, 0, close(pfds[0]));
}
void *CancelSelfWorkerAsync(void *arg) {
char buf[8];
pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, 0);
pthread_cleanup_push(OnCleanup, 0);
pthread_cancel(pthread_self());
pthread_cleanup_pop(0);
return 0;
}
TEST(pthread_cancel, self_asynchronous_takesImmediateEffect) {
void *rc;
pthread_t th;
ASSERT_SYS(0, 0, pipe(pfds));
ASSERT_EQ(0, pthread_create(&th, 0, CancelSelfWorkerAsync, 0));
ASSERT_EQ(0, pthread_join(th, &rc));
ASSERT_EQ(PTHREAD_CANCELED, rc);
ASSERT_TRUE(gotcleanup);
ASSERT_SYS(0, 0, close(pfds[1]));
ASSERT_SYS(0, 0, close(pfds[0]));
}
void *Worker(void *arg) {
int n;
char buf[8];
@ -74,7 +120,6 @@ TEST(pthread_cancel, synchronous_delayed) {
}
void *DisabledWorker(void *arg) {
int n;
char buf[8];
pthread_setcancelstate(PTHREAD_CANCEL_MASKED, 0);
pthread_cleanup_push(OnCleanup, 0);
@ -109,3 +154,61 @@ TEST(pthread_cancel, masked_delayed) {
ASSERT_SYS(0, 0, close(pfds[1]));
ASSERT_SYS(0, 0, close(pfds[0]));
}
void *CondWaitMaskedWorker(void *arg) {
pthread_setcancelstate(PTHREAD_CANCEL_MASKED, 0);
ASSERT_EQ(0, pthread_mutex_lock(&mu));
ASSERT_EQ(ECANCELED, pthread_cond_timedwait(&cv, &mu, 0));
ASSERT_EQ(0, pthread_mutex_unlock(&mu));
return 0;
}
TEST(pthread_cancel, condMaskedWait) {
void *rc;
pthread_t th;
ASSERT_EQ(0, pthread_create(&th, 0, CondWaitMaskedWorker, 0));
ASSERT_EQ(0, pthread_cancel(th));
ASSERT_EQ(0, pthread_join(th, &rc));
ASSERT_EQ(0, rc);
}
TEST(pthread_cancel, condWaitMaskedDelayed) {
void *rc;
pthread_t th;
ASSERT_EQ(0, pthread_create(&th, 0, CondWaitMaskedWorker, 0));
usleep(10);
ASSERT_EQ(0, pthread_cancel(th));
ASSERT_EQ(0, pthread_join(th, &rc));
ASSERT_EQ(0, rc);
}
void *CondWaitDeferredWorker(void *arg) {
pthread_setcancelstate(PTHREAD_CANCEL_DEFERRED, 0);
ASSERT_EQ(0, pthread_mutex_lock(&mu));
ASSERT_EQ(ECANCELED, pthread_cond_timedwait(&cv, &mu, 0));
ASSERT_EQ(0, pthread_mutex_unlock(&mu));
return 0;
}
TEST(pthread_cancel, condDeferredWait) {
void *rc;
pthread_t th;
ASSERT_EQ(0, pthread_create(&th, 0, CondWaitDeferredWorker, 0));
ASSERT_EQ(0, pthread_cancel(th));
ASSERT_EQ(0, pthread_join(th, &rc));
ASSERT_EQ(PTHREAD_CANCELED, rc);
ASSERT_EQ(0, pthread_mutex_trylock(&mu));
ASSERT_EQ(0, pthread_mutex_unlock(&mu));
}
TEST(pthread_cancel, condDeferredWaitDelayed) {
void *rc;
pthread_t th;
ASSERT_EQ(0, pthread_create(&th, 0, CondWaitDeferredWorker, 0));
usleep(10);
ASSERT_EQ(0, pthread_cancel(th));
ASSERT_EQ(0, pthread_join(th, &rc));
ASSERT_EQ(PTHREAD_CANCELED, rc);
ASSERT_EQ(0, pthread_mutex_trylock(&mu));
ASSERT_EQ(0, pthread_mutex_unlock(&mu));
}