1// RUN: %clang_cl_asan %Od %s %Fe%t
2// RUN: not %run %t 2>&1 | FileCheck %s
3
4#include <malloc.h>
5
6int main() {
7 int *buffer = (int*)calloc(nmemb: 42, size: sizeof(int));
8 buffer[-1] = 42;
9 // CHECK: AddressSanitizer: heap-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
10 // CHECK: WRITE of size 4 at [[ADDR]] thread T0
11 // CHECK-NEXT: {{#0 .* main .*calloc_left_oob.cpp}}:[[@LINE-3]]
12 // CHECK: [[ADDR]] is located 4 bytes before 168-byte region
13 // CHECK: allocated by thread T0 here:
14 // CHECK: {{#0 .* calloc }}
15 // CHECK: {{ #[1-2] .* main .*calloc_left_oob.cpp}}:[[@LINE-8]]
16 free(ptr: buffer);
17}
18

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