compiler-rt/test/tsan/tls_race.cpp

   1 // RUN: %clangxx_tsan %darwin_min_target_with_tls_support -O1 %s -o %t && \
   2 // RUN:   %deflake %run %t | \
   3 // RUN:   FileCheck %s --check-prefix=CHECK-%os --check-prefix=CHECK
   4 #include "test.h"
   5
   6 void *Thread(void *a) {
   7   barrier_wait(&barrier);
   8   *(int*)a = 43;
   9   return 0;
  10 }
  11
  12 int main() {
  13   barrier_init(&barrier, 2);
  14   static __thread int Var = 42;
  15   pthread_t t;
  16   pthread_create(&t, 0, Thread, &Var);
  17   Var = 43;
  18   barrier_wait(&barrier);
  19   pthread_join(t, 0);
  20 }
  21
  22 // CHECK: WARNING: ThreadSanitizer: data race
  23 // CHECK-Linux:   Location is TLS of main thread.
  24 // CHECK-FreeBSD:   Location is TLS of main thread.
  25 // CHECK-NetBSD:   Location is TLS of main thread.
  26 // CHECK-Darwin:   Location is heap block of size 4