1// RUN: %clangxx_msan -O0 %s -o %t && not %run %t >%t.out 2>&1
2// FileCheck %s <%t.out
3// RUN: %clangxx_msan -O0 %s -o %t && MSAN_OPTIONS=poison_in_free=0 %run %t >%t.out 2>&1
4
5#include <stdio.h>
6#include <stdlib.h>
7#include <string.h>
8
9int main(int argc, char **argv) {
10 char *volatile x = (char*)malloc(size: 50 * sizeof(char));
11 memset(s: x, c: 0, n: 50);
12 free(ptr: x);
13 return x[25];
14 // CHECK: MemorySanitizer: use-of-uninitialized-value
15 // CHECK: #0 {{.*}} in main{{.*}}poison_in_free.cpp:[[@LINE-2]]
16}
17

source code of compiler-rt/test/msan/poison_in_free.cpp