llvm-project

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// RUN: %clangxx_tsan %darwin_min_target_with_tls_support -O1 %s -o %t && \
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// RUN:   %deflake %run %t | \
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// RUN:   FileCheck %s --check-prefix=CHECK-%os --check-prefix=CHECK
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#include "test.h"
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void *Thread2(void *a) {
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  barrier_wait(&barrier);
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  *(int*)a = 43;
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  return 0;
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}
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void *Thread(void *a) {
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  static __thread int Var = 42;
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  pthread_t t;
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  pthread_create(&t, 0, Thread2, &Var);
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  Var = 42;
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  barrier_wait(&barrier);
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  pthread_join(t, 0);
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  return 0;
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}
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int main() {
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  barrier_init(&barrier, 2);
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  pthread_t t;
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  pthread_create(&t, 0, Thread, 0);
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  pthread_join(t, 0);
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  fprintf(stderr, "DONE\n");
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  return 0;
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}
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// CHECK: WARNING: ThreadSanitizer: data race
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// CHECK-Linux:   Location is TLS of thread T1.
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// CHECK-FreeBSD:   Location is TLS of thread T1.
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// CHECK-NetBSD:   Location is TLS of thread T1.
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// CHECK-Darwin:   Location is heap block of size 4
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// CHECK: DONE
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