1// Check that __asan_poison_memory_region works.
2// RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
3//
4// Check that we can disable it
5// RUN: %env_asan_opts=allow_user_poisoning=0 %run %t
6
7#include <stdlib.h>
8
9extern "C" void __asan_poison_memory_region(void *, size_t);
10
11int main(int argc, char **argv) {
12 char *x = new char[16];
13 x[10] = 0;
14 __asan_poison_memory_region(x, 16);
15 int res = x[argc * 10]; // BOOOM
16 // CHECK: ERROR: AddressSanitizer: use-after-poison
17 // CHECK: main{{.*}}use-after-poison.cpp:[[@LINE-2]]
18 delete [] x;
19 return res;
20}
21

source code of compiler-rt/test/asan/TestCases/use-after-poison.cpp