1// RUN: %clang_cl_asan %Od %s %Fe%t
2// RUN: not %run %t 2>&1 | FileCheck %s
3
4#include <stdio.h>
5#include <string.h>
6
7int main() {
8 char str[] = "Hello";
9 if (5 != strlen(s: str))
10 return 1;
11
12 printf(format: "Initial test OK\n");
13 fflush(stream: 0);
14// CHECK: Initial test OK
15
16 str[5] = '!'; // Losing '\0' at the end.
17 int len = strlen(s: str);
18// CHECK: AddressSanitizer: stack-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
19// FIXME: Should be READ of size 1, see issue 155.
20// CHECK: READ of size {{[0-9]+}} at [[ADDR]] thread T0
21// CHECK: strlen
22// CHECK-NEXT: main {{.*}}intercept_strlen.cpp:[[@LINE-5]]
23// CHECK: Address [[ADDR]] is located in stack of thread T0 at offset {{.*}} in frame
24// CHECK-NEXT: main {{.*}}intercept_strlen.cpp
25// CHECK: 'str'{{.*}} <== Memory access at offset {{.*}} overflows this variable
26 return len < 6;
27}
28

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