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llvm / llvm-project / 27c788de759472316169795fa06d592221ac602e
commit27c788de759472316169795fa06d592221ac602e[log] [tgz]
authorJohn Harrison <harjohn@google.com>Thu Mar 06 22:57:06 2025 +0100
committerGitHub <noreply@github.com>Thu Mar 06 13:57:06 2025 -0800
tree8eccd71a3f8495b6fecdc51940e5961ced42ceae
parent462eb7e28ef4507b16a4b45efb356bc6a3523615 [diff]
[lldb-dap] Restore the override FD used by the output redirect on stop. (#129964)

While running lldb-dap over stdin/stdout the `stdout` and `stderr` FD's
are replaced with a pipe that is reading the output to forward to the
dap client. During shutdown we were not properly restoring those FDs,
which means if any component attempted to write to stderr it would
trigger a SIGPIPE due to the pipe being closed during the shutdown
process. This can happen if we have an error reported from the
`DAP::Loop` call that would then log to stderr, such as an error parsing
a malformed DAP message or if lldb-dap crashed and it was trying to
write the stack trace to stderr.

There is one place we were not handling an `llvm::Error` if there was no
logging setup that could trigger this condition.

To address this, I updated the OutputRedirector to restore the FD to the
prior state when `Stop` is called.

---------

Co-authored-by: Jonas Devlieghere <jonas@devlieghere.com>
4 files changed
tree: 8eccd71a3f8495b6fecdc51940e5961ced42ceae
  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. libunwind/
  16. lld/
  17. lldb/
  18. llvm/
  19. llvm-libgcc/
  20. mlir/
  21. offload/
  22. openmp/
  23. polly/
  24. pstl/
  25. runtimes/
  26. third-party/
  27. utils/
  28. .clang-format
  29. .clang-tidy
  30. .git-blame-ignore-revs
  31. .gitattributes
  32. .gitignore
  33. .mailmap
  34. CODE_OF_CONDUCT.md
  35. CONTRIBUTING.md
  36. LICENSE.TXT
  37. pyproject.toml
  38. README.md
  39. 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.

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

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