test/tsan/tls_race2.cc

   1 // RUN: %clangxx_tsan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
   2 #include <pthread.h>
   3 #include <stddef.h>
   4 #include <unistd.h>
   5
   6 void *Thread2(void *a) {
   7   sleep(1);
   8   *(int*)a = 43;
   9   return 0;
  10 }
  11
  12 void *Thread(void *a) {
  13   static __thread int Var = 42;
  14   pthread_t t;
  15   pthread_create(&t, 0, Thread2, &Var);
  16   Var = 42;
  17   pthread_join(t, 0);
  18   return 0;
  19 }
  20
  21 int main() {
  22   pthread_t t;
  23   pthread_create(&t, 0, Thread, 0);
  24   pthread_join(t, 0);
  25 }
  26
  27 // CHECK: WARNING: ThreadSanitizer: data race
  28 // CHECK:   Location is TLS of thread T1.
  29