compiler-rt/test/cfi/nvcall.cpp

   1 // RUN: %clangxx_cfi -o %t1 %s
   2 // RUN: %expect_crash %run %t1 2>&1 | FileCheck --check-prefix=CFI %s
   3
   4 // RUN: %clangxx_cfi -DB32 -o %t2 %s
   5 // RUN: %expect_crash %run %t2 2>&1 | FileCheck --check-prefix=CFI %s
   6
   7 // RUN: %clangxx_cfi -DB64 -o %t3 %s
   8 // RUN: %expect_crash %run %t3 2>&1 | FileCheck --check-prefix=CFI %s
   9
  10 // RUN: %clangxx_cfi -DBM -o %t4 %s
  11 // RUN: %expect_crash %run %t4 2>&1 | FileCheck --check-prefix=CFI %s
  12
  13 // RUN: %clangxx -o %t5 %s
  14 // RUN: %run %t5 2>&1 | FileCheck --check-prefix=NCFI %s
  15
  16 // RUN: %clangxx_cfi_diag -o %t6 %s
  17 // RUN: %run %t6 2>&1 | FileCheck --check-prefix=CFI-DIAG %s
  18
  19 // Tests that the CFI mechanism crashes the program when making a non-virtual
  20 // call to an object of the wrong class, by casting a pointer to such an object
  21 // and attempting to make a call through it.
  22
  23 // REQUIRES: cxxabi
  24
  25 #include <stdio.h>
  26 #include "utils.h"
  27
  28 struct A {
  29   virtual void v();
  30 };
  31
  32 void A::v() {}
  33
  34 struct B {
  35   void f();
  36   virtual void g();
  37 };
  38
  39 void B::f() {}
  40 void B::g() {}
  41
  42 int main() {
  43   create_derivers<B>();
  44
  45   A *a = new A;
  46   break_optimization(a);
  47
  48   // CFI: 1
  49   // NCFI: 1
  50   fprintf(stderr, "1\n");
  51
  52   // CFI-DIAG: runtime error: control flow integrity check for type 'B' failed during non-virtual call
  53   // CFI-DIAG-NEXT: note: vtable is of type '{{(struct )?}}A'
  54   ((B *)a)->f(); // UB here
  55
  56   // CFI-NOT: {{^2$}}
  57   // NCFI: {{^2$}}
  58   fprintf(stderr, "2\n");
  59 }