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comparison compiler-rt/test/tsan/memcmp_race.cpp @ 150:1d019706d866

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LLVM10
author anatofuz
date Thu, 13 Feb 2020 15:10:13 +0900
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children 0572611fdcc8
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147:c2174574ed3a 150:1d019706d866
1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2 #include "test.h"
3 #include <string.h>
4
5 char *data0 = new char[10];
6 char *data1 = new char[10];
7 char *data2 = new char[10];
8
9 void *Thread1(void *x) {
10 static volatile int size = 1;
11 static volatile int sink;
12 sink = memcmp(data0+5, data1, size);
13 barrier_wait(&barrier);
14 return NULL;
15 }
16
17 void *Thread2(void *x) {
18 static volatile int size = 4;
19 barrier_wait(&barrier);
20 memcpy(data0+5, data2, size);
21 return NULL;
22 }
23
24 int main() {
25 barrier_init(&barrier, 2);
26 print_address("addr=", 1, &data0[5]);
27 pthread_t t[2];
28 pthread_create(&t[0], NULL, Thread1, NULL);
29 pthread_create(&t[1], NULL, Thread2, NULL);
30 pthread_join(t[0], NULL);
31 pthread_join(t[1], NULL);
32 return 0;
33 }
34
35 // CHECK: addr=[[ADDR:0x[0-9,a-f]+]]
36 // CHECK: WARNING: ThreadSanitizer: data race
37 // CHECK: Write of size 1 at [[ADDR]] by thread T2:
38 // CHECK: #0 {{(memcpy|memmove)}}
39 // CHECK: #1 Thread2
40 // CHECK: Previous read of size 1 at [[ADDR]] by thread T1:
41 // CHECK: #0 memcmp
42 // CHECK: #1 Thread1