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150
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1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
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2 #include "test.h"
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3
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4 int Global;
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5 pthread_mutex_t mtx1;
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6 pthread_mutex_t mtx2;
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7
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8 void *Thread1(void *x) {
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9 barrier_wait(&barrier);
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10 pthread_mutex_lock(&mtx1);
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11 Global++;
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12 pthread_mutex_unlock(&mtx1);
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13 return NULL;
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14 }
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15
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16 void *Thread2(void *x) {
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17 pthread_mutex_lock(&mtx2);
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18 Global--;
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19 pthread_mutex_unlock(&mtx2);
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20 barrier_wait(&barrier);
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21 return NULL;
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22 }
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23
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24 int main() {
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25 barrier_init(&barrier, 2);
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26 // CHECK: WARNING: ThreadSanitizer: data race
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27 // CHECK: Write of size 4 at {{.*}} by thread T1
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28 // CHECK: (mutexes: write [[M1:M[0-9]+]]):
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29 // CHECK: Previous write of size 4 at {{.*}} by thread T2
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30 // CHECK: (mutexes: write [[M2:M[0-9]+]]):
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31 // CHECK: Mutex [[M1]] (0x{{.*}}) created at:
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32 // CHECK: #0 pthread_mutex_init
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33 // CHECK: #1 main {{.*}}mutexset5.cpp:[[@LINE+4]]
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34 // CHECK: Mutex [[M2]] (0x{{.*}}) created at:
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35 // CHECK: #0 pthread_mutex_init
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207
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36 // CHECK: #1 main {{.*}}mutexset5.cpp:[[@LINE+2]]
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150
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37 pthread_mutex_init(&mtx1, 0);
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38 pthread_mutex_init(&mtx2, 0);
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39 pthread_t t[2];
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40 pthread_create(&t[0], NULL, Thread1, NULL);
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41 pthread_create(&t[1], NULL, Thread2, NULL);
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42 pthread_join(t[0], NULL);
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43 pthread_join(t[1], NULL);
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44 pthread_mutex_destroy(&mtx1);
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45 pthread_mutex_destroy(&mtx2);
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46 }
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