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comparison compiler-rt/test/msan/memcmp_test.cpp @ 150:1d019706d866

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LLVM10
author anatofuz
date Thu, 13 Feb 2020 15:10:13 +0900
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147:c2174574ed3a 150:1d019706d866
1 // RUN: %clangxx_msan -O0 -g %s -o %t
2 // RUN: not %run %t 2>&1 | FileCheck %s
3 // RUN: MSAN_OPTIONS=intercept_memcmp=0 %run %t
4
5 #include <string.h>
6 #include <stdio.h>
7 int main(int argc, char **argv) {
8 char a1[4];
9 char a2[4];
10 for (int i = 0; i < argc * 3; i++)
11 a2[i] = a1[i] = i;
12 int res = memcmp(a1, a2, 4);
13 if (!res)
14 printf("equals");
15 return 0;
16 // CHECK: Uninitialized bytes in MemcmpInterceptorCommon at offset 3
17 // CHECK: MemorySanitizer: use-of-uninitialized-value
18 }