tree 100f8aa7f864295c596627d7fad5b2a52941cdf5
parent 3eaab617b926dd9e1f05589e89b3d6092aa615d5
author Martin Storsjö <martin@martin.st> 1746778118 +0300
committer Copybara-Service <copybara-worker@google.com> 1746778399 -0700

[libunwind] [SEH] Implement parsing of aarch64 pdata/xdata (#137949)

This is needed for forced unwind, for some testcases in
libunwind/libcxxabi.

This adds an aarch64 case for extracting the LanguageHandler and
HandlerData fields from unwind info, in UnwindCursor::getInfoFromSEH,
corresponding to the existing case for x86_64.

This uses the struct IMAGE_ARM64_RUNTIME_FUNCTION_ENTRY_XDATA; this only
became available in WinSDK 10.0.19041.0 and mingw-w64 v11.0 (or a
mingw-w64 git snapshot after April 2023).

(This is only a build-time requirement though; the format for the unwind
data has been fixed since the start of Windows 10 on ARM64, so this
doesn't impose any runtime requirement.)

GitOrigin-RevId: 2e436b15d30689c4525da3c8d4467a1c70e509f5