[all-commits] [llvm/llvm-project] e2455b: [BOLT][DWARF] Get DWO file via relative path if th...

[Jinjie Huang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e2455bfc101bfdd59ac6426c3a804f8b78152fd7
      https://github.com/llvm/llvm-project/commit/e2455bfc101bfdd59ac6426c3a804f8b78152fd7
  Author: Jinjie Huang <huangjinjie at bytedance.com>
  Date:   2025-09-15 (Mon, 15 Sep 2025)

  Changed paths:
    M bolt/lib/Core/BinaryContext.cpp
    M bolt/lib/Rewrite/DWARFRewriter.cpp
    A bolt/test/dwo-name-retrieving.test

  Log Message:
  -----------
  [BOLT][DWARF] Get DWO file via relative path if the CompilationDir does not exist (#154515)

In distributed builds, the DWARF CompilationDir is often invalid,
causing BOLT to fail when locating DWO files. If the default path does
not exist, it seems better to consider the DWOName as a relative path in
this case.

The implementation of this patch will try to search for the DWO file in
the following order:
1. CompDirOverride + DWOName (if CompDirOverride specified)
2. CompilationDir + DWOName (if CompilationDir exists)
3. **Current directory + DWOName (relative path as a fallback)**

This patch also fixes a crash that occurs when DWOName is an absolute path and a DWP file is provided.



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