1 // RUN: %clang_cc1 -triple=x86_64-unknown-unknown -verify -fcf-protection=branch -fsyntax-only %s
2 
3 // Function pointer definition.
4 typedef void (*FuncPointerWithNoCfCheck)(void) __attribute__((nocf_check)); // no-warning
5 typedef void (*FuncPointer)(void);
6 
7 // Dont allow function declaration and definition mismatch.
8 void __attribute__((nocf_check)) testNoCfCheck();   // expected-note {{previous declaration is here}}
testNoCfCheck()9 void testNoCfCheck(){}; //  expected-error {{conflicting types for 'testNoCfCheck'}}
10 
11 // No variable or parameter declaration
12 __attribute__((nocf_check)) int i;                              // expected-warning {{'nocf_check' attribute only applies to function}}
testNoCfCheckImpl(double i)13 void testNoCfCheckImpl(double __attribute__((nocf_check)) i) {} // expected-warning {{'nocf_check' attribute only applies to function}}
14 
15 // Allow attributed function pointers as well as casting between attributed
16 // and non-attributed function pointers.
testNoCfCheckMismatch(FuncPointer f)17 void testNoCfCheckMismatch(FuncPointer f) {
18   FuncPointerWithNoCfCheck fNoCfCheck = f; // expected-warning {{incompatible function pointer types}}
19   (*fNoCfCheck)();                         // no-warning
20 }
21 
22 // 'nocf_check' Attribute has no parameters.
23 int testNoCfCheckParams() __attribute__((nocf_check(1))); // expected-error {{'nocf_check' attribute takes no arguments}}
24