1 // RUN: %clang_cc1 -no-opaque-pointers -triple x86_64-unknown-linux-gnu -emit-llvm -fsanitize=cfi-icall -o - %s | FileCheck %s
2
3 #if !__has_builtin(__builtin_function_start)
4 #error "missing __builtin_function_start"
5 #endif
6
a(void)7 void a(void) {}
8 // CHECK: @e = global i8* bitcast (void ()* no_cfi @_Z1av to i8*)
9 const void *e = __builtin_function_start(a);
10
11 constexpr void (*d)() = &a;
12 // CHECK: @f = global i8* bitcast (void ()* no_cfi @_Z1av to i8*)
13 const void *f = __builtin_function_start(d);
14
b(void)15 void b(void) {}
16 // CHECK: @g = global [2 x i8*] [i8* bitcast (void ()* @_Z1bv to i8*), i8* bitcast (void ()* no_cfi @_Z1bv to i8*)]
17 void *g[] = {(void *)b, __builtin_function_start(b)};
18
c(void * p)19 void c(void *p) {}
20
21 class A {
22 public:
23 void f();
24 virtual void g();
25 static void h();
26 int i() const;
27 int i(int n) const;
28 };
29
f()30 void A::f() {}
g()31 void A::g() {}
h()32 void A::h() {}
33
34 // CHECK: define {{.*}}i32 @_ZNK1A1iEv(%class.A* {{.*}}%this)
i() const35 int A::i() const { return 0; }
36
37 // CHECK: define {{.*}}i32 @_ZNK1A1iEi(%class.A* noundef {{.*}}%this, i32 noundef %n)
i(int n) const38 int A::i(int n) const { return 0; }
39
h(void)40 void h(void) {
41 // CHECK: store i8* bitcast (void ()* no_cfi @_Z1bv to i8*), i8** %g
42 void *g = __builtin_function_start(b);
43 // CHECK: call void @_Z1cPv(i8* noundef bitcast (void ()* no_cfi @_Z1av to i8*))
44 c(__builtin_function_start(a));
45
46 // CHECK: store i8* bitcast (void (%class.A*)* no_cfi @_ZN1A1fEv to i8*), i8** %Af
47 void *Af = __builtin_function_start(&A::f);
48 // CHECK: store i8* bitcast (void (%class.A*)* no_cfi @_ZN1A1gEv to i8*), i8** %Ag
49 void *Ag = __builtin_function_start(&A::g);
50 // CHECK: store i8* bitcast (void ()* no_cfi @_ZN1A1hEv to i8*), i8** %Ah
51 void *Ah = __builtin_function_start(&A::h);
52 // CHECK: store i8* bitcast (i32 (%class.A*)* no_cfi @_ZNK1A1iEv to i8*), i8** %Ai1
53 void *Ai1 = __builtin_function_start((int(A::*)() const) & A::i);
54 // CHECK: store i8* bitcast (i32 (%class.A*, i32)* no_cfi @_ZNK1A1iEi to i8*), i8** %Ai2
55 void *Ai2 = __builtin_function_start((int(A::*)(int) const) & A::i);
56 }
57