Roll clang with fix for ABI change #44711
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It looks like this pull request may not have tests. Please make sure to add tests before merging. If you need an exemption to this rule, contact Hixie on the #hackers channel in Chat (don't just cc him here, he won't see it! He's on Discord!). If you are not sure if you need tests, consider this rule of thumb: the purpose of a test is to make sure someone doesn't accidentally revert the fix. Ask yourself, is there anything in your PR that you feel it is important we not accidentally revert back to how it was before your fix? Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing. |
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@dnfield A trial app with this fix made it through to testflight, so I think we're good to go. |
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| // Copyright 2013 The Flutter Authors. All rights reserved. | |||
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…133220) flutter/engine@67e8b82...aa98a9d 2023-08-24 dnfield@google.com [Impeller] Fix stencil buffer format selection on Vulkan backend, add support for D24UnormS8Uint (flutter/engine#45025) 2023-08-24 jason-simmons@users.noreply.github.com Fix a clang-tidy error seen in the latest toolchain roll (flutter/engine#45039) 2023-08-23 skia-flutter-autoroll@skia.org Roll Skia from a631fefdba37 to 9d4db3443527 (1 revision) (flutter/engine#45031) 2023-08-23 zanderso@users.noreply.github.com Roll clang with fix for ABI change (flutter/engine#44711) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll Please CC jimgraham@google.com,rmistry@google.com,zra@google.com on the revert to ensure that a human is aware of the problem. To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
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In the change here llvm/llvm-project@b653a28, an intentional ABI breaking change was introduced to the clang runtime library for macOS and iOS. That change caused a symbol requiring dynamic linkage to be exposed that triggers iOS App Store checks for usage of private API. This PR resolves that issue by rolling clang forward and introducing a definition of `_availability_version_check`. The declaration with weak linkage in the clang runtime library [here](https://github.com/llvm/llvm-project/blob/b653a2823fe4b4c9c6d85cfe119f31d8e70c2fa0/compiler-rt/lib/builtins/os_version_check.c#L89) will then be resolved against the definition introduced in this PR. Since the declaration in the clang runtime library will now be resolved by static linking, the Flutter dylib will no longer require it to be dynamically linked, and will therefore not trigger the App Store check for using private API. The definition of `_availability_version_check` is implemented using the `dlsym` strategy used by the old version of clang [here](https://github.com/llvm/llvm-project/blob/f9ac5575675e4117c2e097a71ad0f02cab92aa97/compiler-rt/lib/builtins/os_version_check.c#L97). Fixes flutter/flutter#132130
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This PR ports more of the implementation of availability checking from clang-rt into the Engine. In particular, when the call to look up the symbol `_availability_version_check` fails, this PR falls back on reading the platform version information out of a plist file at a well-known location, as is done [here](https://github.com/llvm/llvm-project/blob/2fd66e6eb659701b9d4c88708d55d5854a246815/compiler-rt/lib/builtins/os_version_check.c#L163). This change fixes a mistake in #44711, which didn't account for `_availability_version_check` not being available on iOS 11 and 12. Fixes flutter/flutter#138711
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This PR ports more of the implementation of availability checking from clang-rt into the Engine. In particular, when the call to look up the symbol `_availability_version_check` fails, this PR falls back on reading the platform version information out of a plist file at a well-known location, as is done [here](https://github.com/llvm/llvm-project/blob/2fd66e6eb659701b9d4c88708d55d5854a246815/compiler-rt/lib/builtins/os_version_check.c#L163). This change fixes a mistake in flutter#44711, which didn't account for `_availability_version_check` not being available on iOS 11 and 12. Fixes flutter/flutter#138711
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In the change here llvm/llvm-project@b653a28, an intentional ABI breaking change was introduced to the clang runtime library for macOS and iOS. That change caused a symbol requiring dynamic linkage to be exposed that triggers iOS App Store checks for usage of private API.
This PR resolves that issue by rolling clang forward and introducing a definition of
_availability_version_check. The declaration with weak linkage in the clang runtime library here will then be resolved against the definition introduced in this PR. Since the declaration in the clang runtime library will now be resolved by static linking, the Flutter dylib will no longer require it to be dynamically linked, and will therefore not trigger the App Store check for using private API.The definition of
_availability_version_checkis implemented using thedlsymstrategy used by the old version of clang here.Fixes flutter/flutter#132130