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llvm / llvm-project / 507f394d03d8cb24c90ae4b2d28e8afae3b4088d
commit507f394d03d8cb24c90ae4b2d28e8afae3b4088d[log] [tgz]
authormykouHW <koumeiyuan@huawei.com>Sun Sep 21 00:41:54 2025 +0800
committerGitHub <noreply@github.com>Sat Sep 20 16:41:54 2025 +0000
treed404d86ea2ed6beb2ec915fd11ad358a7d5cc6e4
parentef840d8fb7d072344867b21d2cb6574ba494b0c9 [diff]
[ELF] -r/--emit-relocs: Fix crash when processing .rela.text before .text (#156354)

fixes #156417 

When the relocation section is placed before the relocated section and
the relocated section is not defined in the linker script, an error will
occur during the linking process.

**Issue Cause:**  
In a.ro, `.rela.text` precedes its relocated `InputSection` `.text`.
`addOrphanSections` doesn't handle this scenario.
When it processes `.rela.text`, in the called `getOutputSectionName`,
`rel->getOutputSection()` is nullptr (input `.text` doesn't yet have a
parent output section), leading to an assertion failure.

**Solution:**  
For --emit-relocs and -r, ensure the output section for `.text.foo` is
created before the output section for `.rela.text.foo`.

---------

Co-authored-by: Fangrui Song <i@maskray.me>
2 files changed
tree: d404d86ea2ed6beb2ec915fd11ad358a7d5cc6e4
  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

OpenSSF Scorecard OpenSSF Best Practices libc++

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.

Getting in touch

Join the LLVM Discourse forums, Discord chat, LLVM Office Hours or Regular sync-ups.

The LLVM project has adopted a code of conduct for participants to all modes of communication within the project.