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llvm / llvm-project / 420d56a3945588ca2141602c387c0feb3f358f47
commit420d56a3945588ca2141602c387c0feb3f358f47[log] [tgz]
authorjimingham <jingham@apple.com>Fri Nov 14 10:14:28 2025 -0800
committerGitHub <noreply@github.com>Fri Nov 14 10:14:28 2025 -0800
tree5a4425c3f41c6ffd473aed6171dc2c61b3cad08e
parent306f49a2549428db165f4eea585e983aa2468c05 [diff]
Clean up MachTask.mm's handling of m_exception_thread. (#167994)

This was getting joined in ShutDownExcecptionThread (sic) but not
cleared. So this function was not safe to call twice, since you aren't
supposed to join a thread twice. Sadly, this was called in
MachTask::Clear and MachProcess::Destroy, which are both called when you
tell debugserver to detach.

This didn't seem to cause problems IRL, but the most recent ASAN detects
this as an error and calls ASAN::Die, which was causing all the tests
that ran detach to fail.

I fixed that by moving the clear & test for m_exception_thread to
ShutDownExceptionThread. I also fixed the spelling of that routine. And
that routine was claiming to return a kern_return_t which no one was
checking. It actually returns a kern_return_t if there was a Mach
failure and a Posix error if there was a join failure. Since there's
really nothing you can do but exit if this fails, which is always what
you are in the process of doing when you call this, and since we have
already done all the useful logging in ShutDownExceptionThread, I just
removed the return value.
3 files changed
tree: 5a4425c3f41c6ffd473aed6171dc2c61b3cad08e
  1. .ci/
  2. .github/
  3. bolt/
  4. clang/
  5. clang-tools-extra/
  6. cmake/
  7. compiler-rt/
  8. cross-project-tests/
  9. flang/
  10. flang-rt/
  11. libc/
  12. libclc/
  13. libcxx/
  14. libcxxabi/
  15. libsycl/
  16. libunwind/
  17. lld/
  18. lldb/
  19. llvm/
  20. llvm-libgcc/
  21. mlir/
  22. offload/
  23. openmp/
  24. orc-rt/
  25. polly/
  26. runtimes/
  27. third-party/
  28. utils/
  29. .clang-format
  30. .clang-format-ignore
  31. .clang-tidy
  32. .git-blame-ignore-revs
  33. .gitattributes
  34. .gitignore
  35. .mailmap
  36. CODE_OF_CONDUCT.md
  37. CONTRIBUTING.md
  38. LICENSE.TXT
  39. pyproject.toml
  40. README.md
  41. SECURITY.md
README.md

The LLVM Compiler Infrastructure

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Welcome to the LLVM project!

This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.

The LLVM project has multiple components. The core of the project is itself called “LLVM”. This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.

C-like languages use the Clang frontend. This component compiles C, C++, Objective-C, and Objective-C++ code into LLVM bitcode -- and from there into object files, using LLVM.

Other components include: the libc++ C++ standard library, the LLD linker, and more.

Getting the Source Code and Building LLVM

Consult the Getting Started with LLVM page for information on building and running LLVM.

For information on how to contribute to the LLVM project, please take a look at the Contributing to LLVM guide.

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