[all-commits] [llvm/llvm-project] b94191: [DebugInfo] Make most debug line prologue errors n...

[James Henderson via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: b94191fecdbadc18b342a27df1109754edcb8c4b
      https://github.com/llvm/llvm-project/commit/b94191fecdbadc18b342a27df1109754edcb8c4b
  Author: James Henderson <james.henderson at sony.com>
  Date:   2020-01-28 (Tue, 28 Jan 2020)

  Changed paths:
    M llvm/include/llvm/DebugInfo/DWARF/DWARFDebugLine.h
    M llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
    M llvm/lib/DebugInfo/DWARF/DWARFDebugLine.cpp
    M llvm/test/tools/llvm-dwarfdump/X86/Inputs/debug_line_malformed.s
    M llvm/test/tools/llvm-dwarfdump/X86/debug_line_invalid.test
    M llvm/unittests/DebugInfo/DWARF/DWARFDebugLineTest.cpp

  Log Message:
  -----------
  [DebugInfo] Make most debug line prologue errors non-fatal to parsing

Many of the debug line prologue errors are not inherently fatal. In most
cases, we can make reasonable assumptions and carry on. This patch does
exactly that. In the case of length problems, the approach of "the
claimed length is correct" is taken to be consistent with other
instances such as the SectionParser, which ignores the read length.

Reviewed by: dblaikie

Differential Revision: https://reviews.llvm.org/D72158