llvm-project

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// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
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#include "test.h"
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void *Thread1(void *x) {
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  int *p = (int*)x;
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  p[0] = 1;
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  barrier_wait(&barrier);
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  return NULL;
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}
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void *Thread2(void *x) {
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  barrier_wait(&barrier);
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  char *p = (char*)x;
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  p[2] = 1;
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  return NULL;
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}
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int main() {
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  barrier_init(&barrier, 2);
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  int *data = new int(42);
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  print_address("ptr1=", 1, data);
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  print_address("ptr2=", 1, (char*)data + 2);
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  pthread_t t[2];
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  pthread_create(&t[0], NULL, Thread1, data);
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  pthread_create(&t[1], NULL, Thread2, data);
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  pthread_join(t[0], NULL);
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  pthread_join(t[1], NULL);
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  delete data;
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}
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// CHECK: ptr1=[[PTR1:0x[0-9,a-f]+]]
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// CHECK: ptr2=[[PTR2:0x[0-9,a-f]+]]
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// CHECK: WARNING: ThreadSanitizer: data race
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// CHECK:   Write of size 1 at [[PTR2]] by thread T2:
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// CHECK:   Previous write of size 4 at [[PTR1]] by thread T1:
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