1// RUN: %clang_cl_asan -O0 %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.cc}}:[[@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