compiler-rt/test/tsan/fd_close_race.cpp

   1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
   2 #include "test.h"
   3 #include <fcntl.h>
   4 #include <sys/stat.h>
   5 #include <sys/types.h>
   6
   7 void *Thread(void *arg) {
   8   char buf;
   9   read((long)arg, &buf, 1);
  10   barrier_wait(&barrier);
  11   return NULL;
  12 }
  13
  14 int main() {
  15   barrier_init(&barrier, 2);
  16   int fd = open("/dev/random", O_RDONLY);
  17   pthread_t t;
  18   pthread_create(&t, NULL, Thread, (void *)(long)fd);
  19   barrier_wait(&barrier);
  20   close(fd);
  21   pthread_join(t, NULL);
  22   fprintf(stderr, "DONE\n");
  23 }
  24
  25 // CHECK: WARNING: ThreadSanitizer: data race
  26 // CHECK: DONE