nvcall.cpp
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// RUN: %clangxx_cfi -o %t1 %s
// RUN: %expect_crash %run %t1 2>&1 | FileCheck --check-prefix=CFI %s
// RUN: %clangxx_cfi -DB32 -o %t2 %s
// RUN: %expect_crash %run %t2 2>&1 | FileCheck --check-prefix=CFI %s
// RUN: %clangxx_cfi -DB64 -o %t3 %s
// RUN: %expect_crash %run %t3 2>&1 | FileCheck --check-prefix=CFI %s
// RUN: %clangxx_cfi -DBM -o %t4 %s
// RUN: %expect_crash %run %t4 2>&1 | FileCheck --check-prefix=CFI %s
// RUN: %clangxx -o %t5 %s
// RUN: %run %t5 2>&1 | FileCheck --check-prefix=NCFI %s
// RUN: %clangxx_cfi_diag -o %t6 %s
// RUN: %run %t6 2>&1 | FileCheck --check-prefix=CFI-DIAG %s
// Tests that the CFI mechanism crashes the program when making a non-virtual
// call to an object of the wrong class, by casting a pointer to such an object
// and attempting to make a call through it.
// REQUIRES: cxxabi
#include <stdio.h>
#include "utils.h"
struct A {
virtual void v();
};
void A::v() {}
struct B {
void f();
virtual void g();
};
void B::f() {}
void B::g() {}
int main() {
create_derivers<B>();
A *a = new A;
break_optimization(a);
// CFI: 1
// NCFI: 1
fprintf(stderr, "1\n");
// CFI-DIAG: runtime error: control flow integrity check for type 'B' failed during non-virtual call
// CFI-DIAG-NEXT: note: vtable is of type '{{(struct )?}}A'
((B *)a)->f(); // UB here
// CFI-NOT: {{^2$}}
// NCFI: {{^2$}}
fprintf(stderr, "2\n");
}