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1 // RUN: %clangxx_tsan -O1 %s -o %t
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2 // RUN: %env_tsan_opts=flush_memory_ms=1:flush_symbolizer_ms=1:memory_limit_mb=1 not %run %t 2>&1 | FileCheck %s
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3 #include "test.h"
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4
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5 long X, Y;
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6
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7 void *Thread(void *arg) {
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8 __atomic_fetch_add(&X, 1, __ATOMIC_SEQ_CST);
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9 barrier_wait(&barrier);
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10 barrier_wait(&barrier);
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11 Y = 1;
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12 return &Y;
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13 }
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14
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15 int main() {
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16 __tsan_flush_memory();
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17 barrier_init(&barrier, 2);
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18 __atomic_fetch_add(&X, 1, __ATOMIC_SEQ_CST);
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19 pthread_t t;
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20 pthread_create(&t, NULL, Thread, NULL);
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21 barrier_wait(&barrier);
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22 __tsan_flush_memory();
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23 // Trigger a race to test flushing of the symbolizer cache.
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24 Y = 2;
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25 barrier_wait(&barrier);
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26 pthread_join(t, NULL);
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27 __atomic_fetch_add(&X, 1, __ATOMIC_SEQ_CST);
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28 // Background runtime thread should do some flushes meanwhile.
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29 sleep(2);
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30 __tsan_flush_memory();
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31 fprintf(stderr, "DONE\n");
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32 // The race may not be detected since we are doing aggressive flushes
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33 // (if the state flush happens between racing accesses, tsan won't
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34 // detect the race). So return 1 to make the test deterministic.
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35 return 1;
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36 }
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37
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38 // CHECK: DONE
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