forked from OSchip/llvm-project
47 lines
1.0 KiB
C++
47 lines
1.0 KiB
C++
// RUN: %clangxx_tsan -O1 --std=c++11 %s -o %t
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// RUN: %env_tsan_opts=report_destroy_locked=0 %run %t 2>&1 | FileCheck %s
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#include "custom_mutex.h"
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// Regression test for a bug.
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// Thr1 destroys a locked mutex, previously such mutex was not removed from
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// sync map and as the result subsequent uses of a mutex located at the same
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// address caused false race reports.
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Mutex mu(false, __tsan_mutex_write_reentrant);
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long data;
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void *thr1(void *arg) {
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mu.Lock();
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mu.~Mutex();
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new(&mu) Mutex(true, __tsan_mutex_write_reentrant);
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return 0;
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}
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void *thr2(void *arg) {
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barrier_wait(&barrier);
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mu.Lock();
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data++;
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mu.Unlock();
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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, thr1, 0);
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pthread_join(th, 0);
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barrier_init(&barrier, 2);
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pthread_create(&th, 0, thr2, 0);
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mu.Lock();
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data++;
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mu.Unlock();
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barrier_wait(&barrier);
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pthread_join(th, 0);
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fprintf(stderr, "DONE\n");
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return 0;
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}
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// CHECK-NOT: WARNING: ThreadSanitizer: data race
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// CHECK: DONE
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