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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 <string.h>
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4
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5 char *data0 = new char[10];
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6 char *data1 = new char[10];
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7 char *data2 = new char[10];
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8
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9 void *Thread1(void *x) {
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10 static volatile int size = 1;
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11 static volatile int sink;
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12 sink = memcmp(data0+5, data1, size);
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13 barrier_wait(&barrier);
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14 return NULL;
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15 }
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16
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17 void *Thread2(void *x) {
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18 static volatile int size = 4;
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19 barrier_wait(&barrier);
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20 memcpy(data0+5, data2, size);
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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 print_address("addr=", 1, &data0[5]);
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27 pthread_t t[2];
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28 pthread_create(&t[0], NULL, Thread1, NULL);
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29 pthread_create(&t[1], NULL, Thread2, NULL);
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30 pthread_join(t[0], NULL);
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31 pthread_join(t[1], NULL);
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32 return 0;
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33 }
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34
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35 // CHECK: addr=[[ADDR:0x[0-9,a-f]+]]
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36 // CHECK: WARNING: ThreadSanitizer: data race
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37 // CHECK: Write of size 1 at [[ADDR]] by thread T2:
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38 // CHECK: #0 {{(memcpy|memmove)}}
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39 // CHECK: #1 Thread2
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40 // CHECK: Previous read of size 1 at [[ADDR]] by thread T1:
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41 // CHECK: #0 memcmp
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42 // CHECK: #1 Thread1
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