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
bg(B * b)19 extern "C" void bg(B *b) {
20 // CHECK: call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
21 // CHECK-STRICT: call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTS1B")
22 b->g();
23 }
24
25 // CHECK-LABEL: @cg
26 // CHECK-STRICT-LABEL: @cg
cg(C * c)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(i8* {{%[^ ]*}}, metadata !"_ZTS1A")
33 // CHECK-STRICT: call i1 @llvm.type.test(i8* {{%[^ ]*}}, metadata !"_ZTS1C")
34 c->g();
35 }
36