clang/test/CodeGenCXX/cfi-nvcall.cpp

   1 // RUN: %clang_cc1 -triple x86_64-unknown-linux -fvisibility=hidden -fsanitize=cfi-nvcall -emit-llvm -o - %s | FileCheck %s
   2 // RUN: %clang_cc1 -triple x86_64-unknown-linux -fvisibility=hidden -fsanitize=cfi-nvcall,cfi-cast-strict -emit-llvm -o - %s | FileCheck --check-prefix=CHECK-STRICT %s
   3
   4 struct A {
   5   virtual void f();
   6 };
   7
   8 struct B : A {
   9   int i;
  10   void g();
  11 };
  12
  13 struct C : A {
  14   void g();
  15 };
  16
  17 // CHECK-LABEL: @bg
  18 // CHECK-STRICT-LABEL: @bg
  19 extern "C" void bg(B *b) {
  20   // CHECK: call i1 @llvm.type.test(ptr {{%[^ ]*}}, metadata !"_ZTS1B")
  21   // CHECK-STRICT: call i1 @llvm.type.test(ptr {{%[^ ]*}}, metadata !"_ZTS1B")
  22   b->g();
  23 }
  24
  25 // CHECK-LABEL: @cg
  26 // CHECK-STRICT-LABEL: @cg
  27 extern "C" void cg(C *c) {
  28   // http://clang.llvm.org/docs/ControlFlowIntegrity.html#strictness
  29   // In this case C's layout is the same as its base class, so we allow
  30   // c to be of type A in non-strict mode.
  31
  32   // CHECK: call i1 @llvm.type.test(ptr {{%[^ ]*}}, metadata !"_ZTS1A")
  33   // CHECK-STRICT: call i1 @llvm.type.test(ptr {{%[^ ]*}}, metadata !"_ZTS1C")
  34   c->g();
  35 }