42 lines
945 B
C++
42 lines
945 B
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
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#include <pthread.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <errno.h>
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pthread_mutex_t m;
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int x;
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void *thr(void *p) {
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pthread_mutex_lock(&m);
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x = 42;
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return 0;
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}
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int main() {
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pthread_mutexattr_t a;
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pthread_mutexattr_init(&a);
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pthread_mutexattr_setrobust(&a, PTHREAD_MUTEX_ROBUST);
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pthread_mutex_init(&m, &a);
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pthread_t th;
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pthread_create(&th, 0, thr, 0);
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sleep(1);
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if (pthread_mutex_trylock(&m) != EOWNERDEAD) {
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fprintf(stderr, "not EOWNERDEAD\n");
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exit(1);
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}
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x = 43;
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pthread_join(th, 0);
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fprintf(stderr, "DONE\n");
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}
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// This is a false positive, tsan must not bark at the data race.
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// But currently it does.
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// CHECK-NOT: WARNING: ThreadSanitizer WARNING: double lock of mutex
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// CHECK: WARNING: ThreadSanitizer: data race
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// CHECK-NOT: EOWNERDEAD
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// CHECK: DONE
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// CHECK-NOT: WARNING: ThreadSanitizer
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