1// RUN: %clangxx_asan %s -o %t && not %run %t 2>&1 | FileCheck %s
2// RUN: %clangxx_asan -O %s -o %t && not %run %t 2>&1 | FileCheck %s
3// Check that we can find huge buffer overflows before.
4#include <stdlib.h>
5#include <string.h>
6int main(int argc, char **argv) {
7 char *x = (char*)malloc(size: 1 << 20);
8 memset(s: x, c: 0, n: 10);
9 int res = x[-argc * 4000]; // BOOOM
10 // CHECK: is located 4000 bytes before
11 free(ptr: x);
12 return res;
13}
14

source code of compiler-rt/test/asan/TestCases/huge_negative_hea_oob.cpp