clang/test/Sema/attr-nocf_check.c

   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(void);   // expected-note {{previous declaration is here}}
   9 void testNoCfCheck(void){}; //  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}}
  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.
  17 void testNoCfCheckMismatch(FuncPointer f) {
  18   FuncPointerWithNoCfCheck fNoCfCheck = f; // expected-error {{incompatible function pointer types}}
  19   (*fNoCfCheck)();                         // no-warning
  20 }
  21
  22 // 'nocf_check' Attribute has no parameters.
  23 int testNoCfCheckParams(void) __attribute__((nocf_check(1))); // expected-error {{'nocf_check' attribute takes no arguments}}