forked from OSchip/llvm-project
39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
// RUN: %clangxx_tsan -O1 %s -o %t
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// 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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#include "test.h"
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long X, Y;
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void *Thread(void *arg) {
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__atomic_fetch_add(&X, 1, __ATOMIC_SEQ_CST);
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barrier_wait(&barrier);
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barrier_wait(&barrier);
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Y = 1;
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return &Y;
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}
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int main() {
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__tsan_flush_memory();
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barrier_init(&barrier, 2);
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__atomic_fetch_add(&X, 1, __ATOMIC_SEQ_CST);
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pthread_t t;
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pthread_create(&t, NULL, Thread, NULL);
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barrier_wait(&barrier);
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__tsan_flush_memory();
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// Trigger a race to test flushing of the symbolizer cache.
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Y = 2;
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barrier_wait(&barrier);
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pthread_join(t, NULL);
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__atomic_fetch_add(&X, 1, __ATOMIC_SEQ_CST);
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// Background runtime thread should do some flushes meanwhile.
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sleep(2);
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__tsan_flush_memory();
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fprintf(stderr, "DONE\n");
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// The race may not be detected since we are doing aggressive flushes
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// (if the state flush happens between racing accesses, tsan won't
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// detect the race). So return 1 to make the test deterministic.
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return 1;
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}
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// CHECK: DONE
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