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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 #include <sys/types.h>
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4 #include <sys/stat.h>
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5 #include <fcntl.h>
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6
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7 int X;
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8
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9 void *Thread1(void *x) {
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10 barrier_wait(&barrier);
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11 int f = open("/dev/random", O_RDONLY);
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12 char buf;
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13 read(f, &buf, 1);
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14 close(f);
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15 X = 42;
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16 return NULL;
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17 }
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18
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19 void *Thread2(void *x) {
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20 X = 43;
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21 write(STDOUT_FILENO, "a", 1);
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22 barrier_wait(&barrier);
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23 return NULL;
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24 }
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25
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26 int main() {
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27 barrier_init(&barrier, 2);
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28 pthread_t t[2];
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29 pthread_create(&t[0], NULL, Thread1, NULL);
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30 pthread_create(&t[1], NULL, Thread2, NULL);
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31 pthread_join(t[0], NULL);
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32 pthread_join(t[1], NULL);
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33 }
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34
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35 // CHECK: WARNING: ThreadSanitizer: data race
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36 // CHECK: Write of size 4
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37 // CHECK: #0 Thread1
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38 // CHECK: Previous write of size 4
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39 // CHECK: #0 Thread2
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40
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41
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