[PATCH] D39294: [llvm-dwarfdump] - Fix issues that might happen when object with broken DWARF expressions is parsed.

[George Rimar via Phabricator via llvm-commits]

grimar created this revision.

Patch improves next things:

1. Fixes assert/crash in `getOpDesc` when giving it a invalid expression op code.
2. `DWARFExpression::print()` called `DWARFExpression::Operation::getEndOffset()` which returned and used uninitialized field EndOffset. Patch fixes that.
3. Teaches verifier to verify DW_AT_location and error out on broken expressions.


https://reviews.llvm.org/D39294

Files:
  lib/DebugInfo/DWARF/DWARFExpression.cpp
  lib/DebugInfo/DWARF/DWARFVerifier.cpp
  test/tools/llvm-dwarfdump/X86/verify_broken_exprloc.s

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