[all-commits] [llvm/llvm-project] 2e436b: [libunwind] [SEH] Implement parsing of aarch64 pda...

[Martin Storsjö via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2e436b15d30689c4525da3c8d4467a1c70e509f5
      https://github.com/llvm/llvm-project/commit/2e436b15d30689c4525da3c8d4467a1c70e509f5
  Author: Martin Storsjö <martin at martin.st>
  Date:   2025-05-09 (Fri, 09 May 2025)

  Changed paths:
    M libunwind/src/UnwindCursor.hpp

  Log Message:
  -----------
  [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.)



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