forked from OSchip/llvm-project
48 lines
1.2 KiB
C++
48 lines
1.2 KiB
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s
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#include <pthread.h>
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#include <stdio.h>
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#include <unistd.h>
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int Global;
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pthread_mutex_t mtx1;
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pthread_mutex_t mtx2;
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void *Thread1(void *x) {
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pthread_mutex_lock(&mtx1);
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pthread_mutex_lock(&mtx2);
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Global++;
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pthread_mutex_unlock(&mtx2);
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pthread_mutex_unlock(&mtx1);
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return NULL;
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}
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void *Thread2(void *x) {
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sleep(1);
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Global--;
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return NULL;
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}
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int main() {
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pthread_mutex_init(&mtx1, 0);
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pthread_mutex_init(&mtx2, 0);
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pthread_t t[2];
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pthread_create(&t[0], NULL, Thread1, NULL);
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pthread_create(&t[1], NULL, Thread2, NULL);
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pthread_join(t[0], NULL);
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pthread_join(t[1], NULL);
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pthread_mutex_destroy(&mtx1);
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pthread_mutex_destroy(&mtx2);
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}
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// CHECK: WARNING: ThreadSanitizer: data race
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// CHECK: Write of size 4 at {{.*}} by thread T2:
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// CHECK: Previous write of size 4 at {{.*}} by thread T1
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// CHECK: (mutexes: write [[M1:M[0-9]+]], write [[M2:M[0-9]+]]):
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// CHECK: Mutex [[M1]] created at:
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// CHECK: #0 pthread_mutex_init
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// CHECK: #1 main {{.*}}/mutexset4.cc:26
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// CHECK: Mutex [[M2]] created at:
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// CHECK: #0 pthread_mutex_init
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// CHECK: #1 main {{.*}}/mutexset4.cc:27
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