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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_Atomic(int*) p;
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void *thr(void *a) {
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  barrier_wait(&barrier);
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  int *pp = __c11_atomic_load(&p, __ATOMIC_RELAXED);
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  *pp = 42;
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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 th;
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  pthread_create(&th, 0, thr, p);
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  __c11_atomic_store(&p, new int, __ATOMIC_RELAXED);
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  barrier_wait(&barrier);
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  pthread_join(th, 0);
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}
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// CHECK: data race
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// CHECK:   Previous write
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// CHECK:     #0 operator new
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// CHECK:   Location is heap block
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// CHECK:     #0 operator new
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