624b724ca6
For backwards compatibility reasons the `ptrauth_qualifier` and `ptrauth_intrinsic` features need to be testable with `__has_feature()` on Apple platforms, but for other platforms this backwards compatibility issue does not exist. This PR resolves these issues by making the `ptrauth_qualifier` and `ptrauth_intrinsic` tests conditional upon a darwin target. This also allows us to revert the ptrauth_qualifier check from an extension to a feature test again, as is required on these platforms. At the same time we introduce a new predefined macro `__PTRAUTH__` that answers the same question as `__has_feature(ptrauth_qualifier)` and `__has_feature(ptrauth_intrinsic)` as those tests are synonymous and only exist separately for compatibility reasons. The requirement to test for the `__PTRAUTH__` macro also resolves the hazard presented by mixing the `ptrauth_qualifier` flag (that impacts ABI and security policies) with `-pedantics-errors`, which makes `__has_extension` return false for all extensions. --------- Co-authored-by: Aaron Ballman <aaron@aaronballman.com>
36 lines
1.2 KiB
C
36 lines
1.2 KiB
C
// RUN: %clang_cc1 -E %s -triple=aarch64 -fptrauth-intrinsics | \
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// RUN: FileCheck %s --check-prefixes=INTRIN
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// RUN: %clang_cc1 -E %s -triple=aarch64 -fptrauth-calls | \
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// RUN: FileCheck %s --check-prefixes=NOINTRIN
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// RUN: %clang_cc1 -E %s -DIS_DARWIN -triple=arm64e-apple-darwin -fptrauth-intrinsics | \
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// RUN: FileCheck %s --check-prefixes=INTRIN,INTRIN_MAC
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// RUN: %clang_cc1 -E %s -DIS_DARWIN -triple=arm64e-apple-darwin -fptrauth-calls | \
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// RUN: FileCheck %s --check-prefixes=NOINTRIN
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#if defined(IS_DARWIN) && __has_extension(ptrauth_qualifier)
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// INTRIN_MAC: has_ptrauth_qualifier1
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void has_ptrauth_qualifier1() {}
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#ifndef __PTRAUTH__
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#error ptrauth_qualifier extension present without predefined test macro
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#endif
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#endif
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#if defined(IS_DARWIN) && __has_feature(ptrauth_qualifier)
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// INTRIN_MAC: has_ptrauth_qualifier2
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void has_ptrauth_qualifier2() {}
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#ifndef __PTRAUTH__
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#error ptrauth_qualifier extension present without predefined test macro
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#endif
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#endif
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#if defined(__PTRAUTH__)
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// INTRIN: has_ptrauth_qualifier3
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void has_ptrauth_qualifier3() {}
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#endif
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#if !defined(__PTRAUTH__) && !__has_feature(ptrauth_qualifier) && !__has_extension(ptrauth_qualifier)
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// NOINTRIN: no_ptrauth_qualifier
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void no_ptrauth_qualifier() {}
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#endif
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