compiler-rt/test/tsan/fd_close_norace2.cpp

   1 // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
   2 #include <pthread.h>
   3 #include <stdio.h>
   4 #include <unistd.h>
   5
   6 int pipes[2];
   7
   8 void *Thread(void *x) {
   9   // wait for shutown signal
  10   while (read(pipes[0], &x, 1) != 1) {
  11   }
  12   close(pipes[0]);
  13   close(pipes[1]);
  14   return 0;
  15 }
  16
  17 int main() {
  18   if (pipe(pipes))
  19     return 1;
  20   pthread_t t;
  21   pthread_create(&t, 0, Thread, 0);
  22   // send shutdown signal
  23   while (write(pipes[1], &t, 1) != 1) {
  24   }
  25   pthread_join(t, 0);
  26   fprintf(stderr, "OK\n");
  27 }
  28
  29 // CHECK-NOT: WARNING: ThreadSanitizer: data race
  30 // CHECK: OK