compiler-rt/test/tsan/fd_close_norace.cpp

   1 // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
   2 #include "test.h"
   3 #include <sys/types.h>
   4 #include <sys/stat.h>
   5 #include <fcntl.h>
   6
   7 void *Thread1(void *x) {
   8   int f = open("/dev/random", O_RDONLY);
   9   close(f);
  10   barrier_wait(&barrier);
  11   return NULL;
  12 }
  13
  14 void *Thread2(void *x) {
  15   barrier_wait(&barrier);
  16   int f = open("/dev/random", O_RDONLY);
  17   close(f);
  18   return NULL;
  19 }
  20
  21 int main() {
  22   barrier_init(&barrier, 2);
  23   pthread_t t[2];
  24   pthread_create(&t[0], NULL, Thread1, NULL);
  25   pthread_create(&t[1], NULL, Thread2, NULL);
  26   pthread_join(t[0], NULL);
  27   pthread_join(t[1], NULL);
  28   fprintf(stderr, "OK\n");
  29 }
  30
  31 // CHECK-NOT: WARNING: ThreadSanitizer: data race
  32
  33