compiler-rt/test/tsan/pthread_mutex_clocklock.cpp

   1 // RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
   2 // REQUIRES: glibc-2.30
   3 #include <pthread.h>
   4 #include <stdio.h>
   5
   6 pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
   7 struct timespec ts = {0};
   8
   9 void *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
  17 int 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   } else
  24     puts("Failed to lock mutex");
  25   fprintf(stderr, "PASS\n");
  26 }
  27
  28 // CHECK-NOT: WARNING: ThreadSanitizer: unlock of an unlocked mutex
  29 // CHECK: PASS