clang/test/CodeGenCXX/ptrauth-throw.cpp

   1 // RUN: %clang_cc1                                                -triple arm64-apple-ios   -fptrauth-calls -fcxx-exceptions -emit-llvm %s -o - | FileCheck %s --check-prefix=CHECK
   2 // RUN: %clang_cc1 -fptrauth-function-pointer-type-discrimination -triple arm64-apple-ios   -fptrauth-calls -fcxx-exceptions -emit-llvm %s -o - | FileCheck %s --check-prefix=CHECKDISC
   3
   4 // RUN: %clang_cc1                                                -triple aarch64-linux-gnu -fptrauth-calls -fcxx-exceptions -emit-llvm %s -o - | FileCheck %s --check-prefix=CHECK
   5 // RUN: %clang_cc1 -fptrauth-function-pointer-type-discrimination -triple aarch64-linux-gnu -fptrauth-calls -fcxx-exceptions -emit-llvm %s -o - | FileCheck %s --check-prefix=CHECKDISC
   6
   7 class Foo {
   8  public:
   9   ~Foo() {
  10   }
  11 };
  12
  13 // CHECK-LABEL: define{{.*}} void @_Z1fv()
  14 // CHECK:  call void @__cxa_throw(ptr %{{.*}}, ptr @_ZTI3Foo, ptr ptrauth (ptr @_ZN3FooD1Ev, i32 0))
  15
  16 // CHECKDISC-LABEL: define{{.*}} void @_Z1fv()
  17 // CHECKDISC:  call void @__cxa_throw(ptr %{{.*}}, ptr @_ZTI3Foo, ptr ptrauth (ptr @_ZN3FooD1Ev, i32 0, i64 10942))
  18
  19 void f() {
  20   throw Foo();
  21 }
  22
  23 // __cxa_throw is defined to take its destructor as "void (*)(void *)" in the ABI.
  24 // CHECK-LABEL: define{{.*}} void @__cxa_throw({{.*}})
  25 // CHECK: call void {{%.*}}(ptr noundef {{%.*}}) [ "ptrauth"(i32 0, i64 0) ]
  26
  27 // CHECKDISC-LABEL: define{{.*}} void @__cxa_throw({{.*}})
  28 // CHECKDISC: call void {{%.*}}(ptr noundef {{%.*}}) [ "ptrauth"(i32 0, i64 10942) ]
  29
  30 extern "C" void __cxa_throw(void *exception, void *, void (*dtor)(void *)) {
  31   dtor(exception);
  32 }