| 1 | // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s |
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| 2 | #include "test.h" |
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| 3 | |
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| 4 | int *g; |
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| 5 | |
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| 6 | void *Thread(void *a) { |
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| 7 | int *p = 0; |
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| 8 | while ((p = __atomic_load_n(&g, __ATOMIC_RELAXED)) == 0) |
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| 9 | usleep(useconds: 100); // spin-wait |
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| 10 | *p = 42; |
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| 11 | return 0; |
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| 12 | } |
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| 13 | |
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| 14 | int main() { |
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| 15 | pthread_t t; |
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| 16 | pthread_create(newthread: &t, attr: 0, start_routine: Thread, arg: 0); |
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| 17 | AnnotateIgnoreWritesBegin(__FILE__, __LINE__); |
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| 18 | int *p = new int(0); |
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| 19 | AnnotateIgnoreWritesEnd(__FILE__, __LINE__); |
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| 20 | __atomic_store_n(&g, p, __ATOMIC_RELAXED); |
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| 21 | pthread_join(th: t, thread_return: 0); |
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| 22 | delete p; |
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| 23 | fprintf(stderr, format: "OK\n" ); |
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| 24 | return 0; |
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| 25 | } |
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| 26 | |
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| 27 | // CHECK-NOT: WARNING: ThreadSanitizer: data race |
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| 28 | // CHECK: OK |
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| 29 | |
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