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 to the left.
4#include <stdlib.h>
5#include <string.h>
6int main(int argc, char **argv) {
7  char *x = (char*)malloc(1 << 20);
8  memset(x, 0, 10);
9  int res = x[-argc * 4000];  // BOOOM
10  // CHECK: is located 4000 bytes to the left of
11  free(x);
12  return res;
13}
14