[all-commits] [llvm/llvm-project] 0156b6: Modify llvm-gsymutil to ignore invalid file indexe...

[Greg Clayton via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0156b6ed6561f67f1b86ceef027908dd425e0615
      https://github.com/llvm/llvm-project/commit/0156b6ed6561f67f1b86ceef027908dd425e0615
  Author: Greg Clayton <gclayton at fb.com>
  Date:   2023-11-06 (Mon, 06 Nov 2023)

  Changed paths:
    M llvm/lib/DebugInfo/GSYM/DwarfTransformer.cpp
    M llvm/unittests/DebugInfo/GSYM/GSYMTest.cpp

  Log Message:
  -----------
  Modify llvm-gsymutil to ignore invalid file indexes (#71431)

DWARF produced by LTO and BOLT can sometimes be broken where file
indexes are beyond the end of the line table's file list in the
prologue. This patch allows llvm-gsymutil to convert this DWARF without
crashing, and emits errors when:

line table contains entries with an invalid file index (line entry will
be removed) inline functions that have invalid DW_AT_call_file file
indexes when there are no line table entries for a function and we fall
back to making a single line table entry from the functions
DW_AT_decl_file/DW_AT_decl_line attributes, we make sure the
DW_AT_decl_file attribute is valid before emitting it.