mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +00:00
97b7116953
After going through the MODE=dbg and MODE=zero build modes, a bunch of little issues were identified, which have been addressed. Fixing those issues created even more troubles for the project, because it improved our ability to detect latent problems which are getting fixed so fast.
192 lines
7.1 KiB
C
192 lines
7.1 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2022 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/mem/gc.h"
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#include "libc/mem/mem.h"
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#include "libc/runtime/runtime.h"
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#include "libc/stdio/temp.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/clock.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/testlib/subprocess.h"
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#include "libc/testlib/testlib.h"
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#include "libc/thread/semaphore.h"
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#include "libc/thread/thread.h"
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pthread_barrier_t barrier;
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char testlib_enable_tmp_setup_teardown;
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void SetUp(void) {
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// TODO(jart): Fix shocking GitHub Actions error.
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if (getenv("CI")) exit(0);
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sem_unlink("/fooz");
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sem_unlink("/barz");
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}
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void IgnoreStderr(void) {
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close(2);
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open("/dev/null", O_WRONLY);
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}
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void *Worker(void *arg) {
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sem_t *a, *b;
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struct timespec ts;
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ASSERT_NE(SEM_FAILED, (a = sem_open("/fooz", 0)));
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ASSERT_EQ((sem_t *)arg, a);
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ASSERT_NE(SEM_FAILED, (b = sem_open("/barz", 0)));
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if (pthread_barrier_wait(&barrier) == PTHREAD_BARRIER_SERIAL_THREAD) {
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ASSERT_SYS(0, 0, sem_unlink("/fooz"));
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}
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ASSERT_SYS(0, 0, clock_gettime(CLOCK_REALTIME, &ts));
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ts.tv_sec += 1;
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ASSERT_SYS(0, 0, sem_post(a));
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ASSERT_SYS(0, 0, sem_timedwait(b, &ts));
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ASSERT_SYS(0, 0, sem_close(b));
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ASSERT_TRUE(testlib_memoryexists(b));
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ASSERT_SYS(0, 0, sem_close(a));
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ASSERT_TRUE(testlib_memoryexists(a));
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return 0;
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}
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// 1. multiple threads opening same name must yield same address
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// 2. semaphore memory is freed, when all threads have closed it
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// 3. semaphore may be unlinked before it's closed, from creator
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// 4. semaphore may be unlinked before it's closed, from threads
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TEST(sem_open, test) {
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sem_t *a, *b;
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int i, r, n = 4;
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pthread_t *t = _gc(malloc(sizeof(pthread_t) * n));
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sem_unlink("/fooz");
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sem_unlink("/barz");
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errno = 0;
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ASSERT_EQ(0, pthread_barrier_init(&barrier, 0, n));
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ASSERT_NE(SEM_FAILED, (a = sem_open("/fooz", O_CREAT, 0644, 0)));
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ASSERT_NE(SEM_FAILED, (b = sem_open("/barz", O_CREAT, 0644, 0)));
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ASSERT_SYS(0, 0, sem_getvalue(a, &r));
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ASSERT_EQ(0, r);
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ASSERT_SYS(0, 0, sem_getvalue(b, &r));
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ASSERT_EQ(0, r);
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for (i = 0; i < n; ++i) ASSERT_EQ(0, pthread_create(t + i, 0, Worker, a));
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for (i = 0; i < n; ++i) ASSERT_SYS(0, 0, sem_wait(a));
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ASSERT_SYS(0, 0, sem_getvalue(a, &r));
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ASSERT_EQ(0, r);
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for (i = 0; i < n; ++i) ASSERT_SYS(0, 0, sem_post(b));
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for (i = 0; i < n; ++i) ASSERT_EQ(0, pthread_join(t[i], 0));
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ASSERT_SYS(0, 0, sem_unlink("/barz"));
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ASSERT_SYS(0, 0, sem_getvalue(b, &r));
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ASSERT_EQ(0, r);
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ASSERT_SYS(0, 0, sem_close(b));
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ASSERT_FALSE(testlib_memoryexists(b));
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ASSERT_SYS(0, 0, sem_close(a));
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ASSERT_FALSE(testlib_memoryexists(a));
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ASSERT_EQ(0, pthread_barrier_destroy(&barrier));
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}
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TEST(sem_close, withUnnamedSemaphore_isUndefinedBehavior) {
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if (!IsModeDbg()) return;
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sem_t sem;
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ASSERT_SYS(0, 0, sem_init(&sem, 0, 0));
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SPAWN(fork);
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IgnoreStderr();
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sem_close(&sem);
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EXITS(128 + SIGABRT); // see __assert_fail
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ASSERT_SYS(0, 0, sem_destroy(&sem));
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}
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TEST(sem_destroy, withNamedSemaphore_isUndefinedBehavior) {
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if (!IsModeDbg()) return;
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sem_t *sem;
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ASSERT_NE(SEM_FAILED, (sem = sem_open("/boop", O_CREAT, 0644, 0)));
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SPAWN(fork);
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IgnoreStderr();
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sem_destroy(sem);
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EXITS(128 + SIGABRT); // see __assert_fail
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ASSERT_SYS(0, 0, sem_unlink("/boop"));
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ASSERT_SYS(0, 0, sem_close(sem));
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}
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TEST(sem_open, inheritAcrossFork) {
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sem_t *a, *b;
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struct timespec ts;
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ASSERT_SYS(0, 0, clock_gettime(CLOCK_REALTIME, &ts));
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ts.tv_sec += 1;
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errno = 0;
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ASSERT_NE(SEM_FAILED, (a = sem_open("/fooz", O_CREAT, 0644, 0)));
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ASSERT_SYS(0, 0, sem_unlink("/fooz"));
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ASSERT_NE(SEM_FAILED, (b = sem_open("/barz", O_CREAT, 0644, 0)));
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ASSERT_SYS(0, 0, sem_unlink("/barz"));
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SPAWN(fork);
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ASSERT_SYS(0, 0, sem_post(a));
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ASSERT_SYS(0, 0, sem_wait(b));
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PARENT();
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ASSERT_SYS(0, 0, sem_wait(a));
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ASSERT_SYS(0, 0, sem_post(b));
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WAIT(exit, 0);
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ASSERT_SYS(0, 0, sem_close(b));
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ASSERT_FALSE(testlib_memoryexists(b));
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ASSERT_SYS(0, 0, sem_close(a));
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ASSERT_FALSE(testlib_memoryexists(a));
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}
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TEST(sem_open, openReadonlyAfterUnlink_enoent) {
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sem_t *sem;
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sem_unlink("/fooz");
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ASSERT_NE(SEM_FAILED, (sem = sem_open("/fooz", O_CREAT, 0644, 0)));
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ASSERT_EQ(0, sem_unlink("/fooz"));
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ASSERT_EQ(SEM_FAILED, sem_open("/fooz", O_RDONLY));
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ASSERT_EQ(ENOENT, errno);
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ASSERT_EQ(0, sem_close(sem));
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}
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TEST(sem_open, openReadonlyAfterIndependentUnlinkAndRecreate_returnsNewOne) {
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if (1) return;
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sem_t *a, *b;
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ASSERT_NE(SEM_FAILED, (a = sem_open("/fooz", O_CREAT, 0644, 0)));
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SPAWN(fork);
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ASSERT_EQ(0, sem_unlink("/fooz"));
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ASSERT_NE(SEM_FAILED, (b = sem_open("/fooz", O_CREAT, 0644, 0)));
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ASSERT_NE(a, b);
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ASSERT_SYS(0, 0, sem_post(a));
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ASSERT_SYS(0, 0, sem_wait(b));
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ASSERT_EQ(0, sem_close(b));
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PARENT();
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ASSERT_SYS(0, 0, sem_wait(a));
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ASSERT_NE(SEM_FAILED, (b = sem_open("/fooz", O_RDONLY)));
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ASSERT_NE(a, b);
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ASSERT_SYS(0, 0, sem_post(b));
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ASSERT_EQ(0, sem_close(b));
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WAIT(exit, 0);
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ASSERT_EQ(0, sem_close(a));
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}
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TEST(sem_close, openTwiceCloseOnce_stillMapped) {
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if (1) return;
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sem_t *a, *b;
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char name[] = "smXXXXXX";
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ASSERT_NE(NULL, mktemp(name));
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ASSERT_NE(SEM_FAILED, (a = sem_open(name, O_CREAT | O_EXCL, 0600, 0)));
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ASSERT_NE(SEM_FAILED, (b = sem_open(name, 0)));
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ASSERT_SYS(0, 0, sem_unlink(name));
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ASSERT_SYS(0, 0, sem_close(a));
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ASSERT_SYS(0, 0, sem_post(a));
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ASSERT_SYS(0, 0, sem_close(b));
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}
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