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// RUN: %clangxx_cfi_dso -DSHARED_LIB %s -fPIC -shared -o %t1-so.so
// RUN: %clangxx_cfi_dso %s -o %t1 %t1-so.so
// RUN: %expect_crash %t1 2>&1 | FileCheck --check-prefix=CFI %s
// RUN: %expect_crash %t1 x 2>&1 | FileCheck --check-prefix=CFI-CAST %s
// RUN: %clangxx_cfi_dso -DB32 -DSHARED_LIB %s -fPIC -shared -o %t2-so.so
// RUN: %clangxx_cfi_dso -DB32 %s -o %t2 %t2-so.so
// RUN: %expect_crash %t2 2>&1 | FileCheck --check-prefix=CFI %s
// RUN: %expect_crash %t2 x 2>&1 | FileCheck --check-prefix=CFI-CAST %s
// RUN: %clangxx_cfi_dso -DB64 -DSHARED_LIB %s -fPIC -shared -o %t3-so.so
// RUN: %clangxx_cfi_dso -DB64 %s -o %t3 %t3-so.so
// RUN: %expect_crash %t3 2>&1 | FileCheck --check-prefix=CFI %s
// RUN: %expect_crash %t3 x 2>&1 | FileCheck --check-prefix=CFI-CAST %s
// RUN: %clangxx_cfi_dso -DBM -DSHARED_LIB %s -fPIC -shared -o %t4-so.so
// RUN: %clangxx_cfi_dso -DBM %s -o %t4 %t4-so.so
// RUN: %expect_crash %t4 2>&1 | FileCheck --check-prefix=CFI %s
// RUN: %expect_crash %t4 x 2>&1 | FileCheck --check-prefix=CFI-CAST %s
// RUN: %clangxx -DBM -DSHARED_LIB %s -fPIC -shared -o %t5-so.so
// RUN: %clangxx -DBM %s -o %t5 %t5-so.so
// RUN: %t5 2>&1 | FileCheck --check-prefix=NCFI %s
// RUN: %t5 x 2>&1 | FileCheck --check-prefix=NCFI %s
// RUN: %clangxx -DBM -DSHARED_LIB %s -fPIC -shared -o %t6-so.so
// RUN: %clangxx_cfi_dso -DBM %s -o %t6 %t6-so.so
// RUN: %t6 2>&1 | FileCheck --check-prefix=NCFI %s
// RUN: %t6 x 2>&1 | FileCheck --check-prefix=NCFI %s
// Tests that the CFI mechanism crashes the program when making a virtual call
// to an object of the wrong class but with a compatible vtable, by casting a
// pointer to such an object and attempting to make a call through it.
// REQUIRES: cxxabi
#include <stdio.h>
#include <string.h>
struct A {
virtual void f();
};
void *create_B();
#ifdef SHARED_LIB
#include "../utils.h"
struct B {
virtual void f();
};
void B::f() {}
void *create_B() {
create_derivers<B>();
return (void *)(new B());
}
#else
void A::f() {}
int main(int argc, char *argv[]) {
void *p = create_B();
A *a;
// CFI: =0=
// CFI-CAST: =0=
// NCFI: =0=
fprintf(stderr, "=0=\n");
if (argc > 1 && argv[1][0] == 'x') {
// Test cast. BOOM.
a = (A*)p;
} else {
// Invisible to CFI. Test virtual call later.
memcpy(&a, &p, sizeof(a));
}
// CFI: =1=
// CFI-CAST-NOT: =1=
// NCFI: =1=
fprintf(stderr, "=1=\n");
a->f(); // UB here
// CFI-NOT: =2=
// CFI-CAST-NOT: =2=
// NCFI: =2=
fprintf(stderr, "=2=\n");
}
#endif
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