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1 // RUN: %clangxx_tsan -O1 %s -o %t
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2 // RUN: %run %t 2>&1 | FileCheck %s
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3 // RUN: %run %t arg 2>&1 | FileCheck %s
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4 // RUN: %run %t arg arg 2>&1 | FileCheck %s
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5 #include "test.h"
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6
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7 // Test for destruction of pthread_cond_t.
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8 // POSIX states that it is safe to destroy a condition variable upon which no
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9 // threads are currently blocked. That is, it is not necessary to wait untill
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10 // other threads return from pthread_cond_wait, they just need to be unblocked.
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11
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12 pthread_mutex_t m;
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13 pthread_cond_t c;
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14 bool done1, done2;
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15
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16 void *thr(void *p) {
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17 pthread_mutex_lock(&m);
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18 done1 = true;
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19 pthread_cond_signal(&c);
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20 while (!done2)
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21 pthread_cond_wait(&c, &m);
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22 pthread_mutex_unlock(&m);
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23 return 0;
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24 }
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25
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26 int main(int argc, char **argv) {
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27 pthread_t th;
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28 pthread_mutex_init(&m, 0);
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29 pthread_cond_init(&c, 0);
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30 pthread_create(&th, 0, thr, 0);
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31 pthread_mutex_lock(&m);
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32 while (!done1)
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33 pthread_cond_wait(&c, &m);
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34 done2 = true;
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35 // Any of these sequences is legal.
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36 if (argc == 1) {
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37 pthread_cond_signal(&c);
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38 pthread_mutex_unlock(&m);
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39 pthread_cond_destroy(&c);
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40 } else if (argc == 2) {
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41 pthread_mutex_unlock(&m);
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42 pthread_cond_signal(&c);
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43 pthread_cond_destroy(&c);
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44 } else {
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45 pthread_cond_signal(&c);
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46 pthread_cond_destroy(&c);
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47 pthread_mutex_unlock(&m);
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48 }
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49 pthread_join(th, 0);
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50 fprintf(stderr, "DONE\n");
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51 }
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52
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53 // CHECK-NOT: ThreadSanitizer: data race
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