1// REQUIRES: gwp_asan
2// RUN: %clangxx_gwp_asan %s -o %t
3// RUN: %expect_crash %run %t 2>&1 | FileCheck %s
4
5// CHECK: GWP-ASan detected a memory error
6// CHECK: Buffer Underflow at 0x{{[a-f0-9]+}} (1 byte to the left
7// CHECK-SAME: of a {{[1-9][0-9]*}}-byte allocation
8
9#include <cstdlib>
10
11#include "page_size.h"
12
13int main() {
14 char *Ptr =
15 reinterpret_cast<char *>(malloc(pageSize()));
16 volatile char x = *(Ptr - 1);
17 return 0;
18}
19