1// RUN: %clang_cl_asan %Od %s %Fe%t
2// RUN: not %run %t 2>&1 | FileCheck %s
3
4class Parent {
5 public:
6 int field;
7};
8
9class Child : public Parent {
10 public:
11 int extra_field;
12};
13
14int main(void) {
15 Parent p;
16 Child *c = (Child*)&p; // Intentional error here!
17 c->extra_field = 42;
18// CHECK: AddressSanitizer: stack-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
19// CHECK: WRITE of size 4 at [[ADDR]] thread T0
20// CHECK-NEXT: {{#0 0x[0-9a-f]* in main .*wrong_downcast_on_stack.cpp}}:[[@LINE-3]]
21// CHECK: [[ADDR]] is located in stack of thread T0 at offset [[OFFSET:[0-9]+]] in frame
22// CHECK-NEXT: {{#0 0x[0-9a-f]* in main }}
23// CHECK: 'p'{{.*}} <== Memory access at offset [[OFFSET]] overflows this variable
24 return 0;
25}
26
27

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