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150
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1 // RUN: %clangxx_tsan -O1 %s -o %t && %run %t
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2
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3 // Data race randomly triggered.
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4 // UNSUPPORTED: netbsd
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5
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6 // Make sure TSan doesn't deadlock on a file stream lock at program shutdown.
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7 // See https://github.com/google/sanitizers/issues/454
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8 #ifdef __FreeBSD__
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9 #define _WITH_GETLINE // to declare getline()
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10 #endif
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11
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12 #include <pthread.h>
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13 #include <stdio.h>
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14 #include <unistd.h>
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15
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16 void *thread(void *unused) {
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17 char *line = NULL;
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18 size_t size;
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19 int fd[2];
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20 pipe(fd);
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21 // Forge a non-standard stream to make sure it's not closed.
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22 FILE *stream = fdopen(fd[0], "r");
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23 while (1) {
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24 volatile int res = getline(&line, &size, stream);
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25 (void)res;
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26 }
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27 return NULL;
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28 }
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29
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30 int main() {
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31 pthread_t t;
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32 pthread_attr_t a;
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33 pthread_attr_init(&a);
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34 pthread_attr_setdetachstate(&a, PTHREAD_CREATE_DETACHED);
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35 pthread_create(&t, &a, thread, NULL);
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36 pthread_attr_destroy(&a);
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37 fprintf(stderr, "DONE\n");
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38 return 0;
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39 // ThreadSanitizer used to hang here because of a deadlock on a file stream.
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40 }
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41
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42 // CHECK: DONE
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