40 lines
853 B
C++
40 lines
853 B
C++
// RUN: %clangxx_tsan -O1 --std=c++11 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
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#include "custom_mutex.h"
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// Test that failed TryLock does not induce parasitic synchronization.
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Mutex mu(true, 0);
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long data;
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void *thr(void *arg) {
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mu.Lock();
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data++;
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mu.Unlock();
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mu.Lock();
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barrier_wait(&barrier);
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barrier_wait(&barrier);
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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, thr, 0);
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barrier_wait(&barrier);
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if (mu.TryLock()) {
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fprintf(stderr, "TryLock succeeded, should not\n");
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exit(0);
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}
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data++;
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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: ThreadSanitizer: data race
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// CHECK-NEXT: Write of size 8 at {{.*}} by main thread:
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// CHECK-NEXT: #0 main {{.*}}custom_mutex1.cc:29
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// CHECK: DONE
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