compiler-rt/test/tsan/Linux/thread_tryjoin.c

   1 // RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
   2 #define _GNU_SOURCE
   3 #include "../test.h"
   4 #include <errno.h>
   5
   6 int var;
   7
   8 void *Thread(void *x) {
   9   barrier_wait(&barrier);
  10   var = 1;
  11   return 0;
  12 }
  13
  14 static void check(int res) {
  15   if (res != EBUSY) {
  16     fprintf(stderr, "Unexpected result of pthread_tryjoin_np: %d\n", res);
  17     exit(1);
  18   }
  19 }
  20
  21 int main() {
  22   barrier_init(&barrier, 2);
  23   pthread_t t;
  24   pthread_create(&t, 0, Thread, 0);
  25   check(pthread_tryjoin_np(t, 0));
  26   barrier_wait(&barrier);
  27   for (;;) {
  28     int res = pthread_tryjoin_np(t, 0);
  29     if (!res)
  30       break;
  31     check(res);
  32     pthread_yield();
  33   }
  34   var = 2;
  35   fprintf(stderr, "PASS\n");
  36   return 0;
  37 }
  38
  39 // CHECK-NOT: WARNING: ThreadSanitizer: data race
  40 // CHECK-NOT: WARNING: ThreadSanitizer: thread leak
  41 // CHECK: PASS