30 lines · cpp
1// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s2// REQUIRES: glibc-2.303#include <pthread.h>4#include <stdio.h>5 6pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;7struct timespec ts = {0};8 9void *tfunc(void *p) {10 if (!pthread_mutex_trylock(&m)) {11 puts("Second thread could not lock mutex");12 pthread_mutex_unlock(&m);13 }14 return p;15}16 17int main() {18 if (!pthread_mutex_clocklock(&m, CLOCK_REALTIME, &ts)) {19 pthread_t thr;20 pthread_create(&thr, 0, tfunc, 0);21 pthread_join(thr, 0);22 pthread_mutex_unlock(&m);23 } else24 puts("Failed to lock mutex");25 fprintf(stderr, "PASS\n");26}27 28// CHECK-NOT: WARNING: ThreadSanitizer: unlock of an unlocked mutex29// CHECK: PASS30