| commit | 624b724ca6df5d2d3ea16b9ed232851e5d061be4 | [log] [tgz] |
|---|---|---|
| author | Oliver Hunt <oliver@apple.com> | Mon Aug 18 13:29:26 2025 -0700 |
| committer | GitHub <noreply@github.com> | Mon Aug 18 20:29:26 2025 +0000 |
| tree | 3e141236801ca4487dc5f9bedd2f2e0e81254fd8 | |
| parent | 9617ce4862cf0ed5257699348f369eb179f119e9 [diff] |
[clang][PAC] ptrauth_qualifier and ptrauth_intrinsic should only be available on Darwin (#153912) 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>
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