a3283a92ae
The qualifier allows programmer to directly control how pointers are signed when they are stored in a particular variable. The qualifier takes three arguments: the signing key, a flag specifying whether address discrimination should be used, and a non-negative integer that is used for additional discrimination. ``` typedef void (*my_callback)(const void*); my_callback __ptrauth(ptrauth_key_process_dependent_code, 1, 0xe27a) callback; ``` Co-Authored-By: John McCall rjmccall@apple.com
36 lines
1.3 KiB
C
36 lines
1.3 KiB
C
// RUN: %clang_cc1 -triple arm64-apple-ios \
|
|
// RUN: -fptrauth-calls -fptrauth-intrinsics -emit-llvm -fblocks \
|
|
// RUN: %s -debug-info-kind=limited -o - | FileCheck %s
|
|
// RUN: %clang_cc1 -triple aarch64-linux-gnu \
|
|
// RUN: -fptrauth-calls -fptrauth-intrinsics -emit-llvm -fblocks \
|
|
// RUN: %s -debug-info-kind=limited -o - | FileCheck %s
|
|
|
|
// Constant initializers for data pointers.
|
|
extern int external_int;
|
|
|
|
int *__ptrauth(1, 0, 1234) g1 = &external_int;
|
|
// CHECK: !DIDerivedType(tag: DW_TAG_LLVM_ptrauth_type,
|
|
// CHECK-SAME: ptrAuthKey: 1,
|
|
// CHECK-SAME: ptrAuthIsAddressDiscriminated: false,
|
|
// CHECK-SAME: ptrAuthExtraDiscriminator: 1234,
|
|
// CHECK-SAME: ptrAuthIsaPointer: false,
|
|
// CHECK-SAME: ptrAuthAuthenticatesNullValues: false)
|
|
|
|
struct A {
|
|
int value;
|
|
};
|
|
struct A *createA(void);
|
|
|
|
void f() {
|
|
__block struct A *__ptrauth(0, 1, 1236) ptr = createA();
|
|
^{
|
|
(void)ptr->value;
|
|
}();
|
|
}
|
|
// CHECK: !DIDerivedType(tag: DW_TAG_LLVM_ptrauth_type,
|
|
// CHECK-NOT: ptrAuthKey
|
|
// CHECK-SAME: ptrAuthIsAddressDiscriminated: true,
|
|
// CHECK-SAME: ptrAuthExtraDiscriminator: 1236,
|
|
// CHECK-SAME: ptrAuthIsaPointer: false,
|
|
// CHECK-SAME: ptrAuthAuthenticatesNullValues: false)
|