[PATCH] D143513: [DebugInfo] Allow parsing line tables aligned to 4 or 8-byte boundaries

[Paul Robinson via Phabricator via llvm-commits]

probinson added a project: debug-info.
probinson added a comment.

+debug-info tag.

It's true that DWARF doesn't require the per-unit .debug_line chunks to be adjacent, which makes life difficult for dumpers who want to read just the .debug_line section (without parsing .debug_info headers).  Debuggers with an edit-and-continue feature can dynamically replace bits of the line table, though, and in those cases padding is handy.  That would usually be a bigger lump than just alignment, though. Just curious, what compiler(s) are aligning line-tables?



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Comment at: llvm/lib/DebugInfo/DWARF/DWARFDebugLine.cpp:1544
+  // .debug_line section to a word multiple. Note that in the specification this
+  // does not seem forbidden since each unit as a DW_AT_stmt_list.
+  std::array PossibleAlignments{4, 8};
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  https://reviews.llvm.org/D143513/new/

https://reviews.llvm.org/D143513