[all-commits] [llvm/llvm-project] 9e09a5: [DebugInfo] Use Cursor to detect errors in debug l...

[James Henderson via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 9e09a54c692b4c5981046ed7d0a700ffdb9e1e27
      https://github.com/llvm/llvm-project/commit/9e09a54c692b4c5981046ed7d0a700ffdb9e1e27
  Author: James Henderson <james.henderson at sony.com>
  Date:   2020-07-03 (Fri, 03 Jul 2020)

  Changed paths:
    M llvm/lib/DebugInfo/DWARF/DWARFDebugLine.cpp
    M llvm/test/tools/llvm-dwarfdump/X86/debug_line_invalid.test
    M llvm/unittests/DebugInfo/DWARF/DWARFDebugLineTest.cpp

  Log Message:
  -----------
  [DebugInfo] Use Cursor to detect errors in debug line prologue parser

Previously, the debug line parser would keep attempting to read data
even if it had run out of data to read. This meant errors in parsing
would often end up being reported as something else, such as an unknown
version or malformed directory/filename table. This patch fixes the
issues by using the Cursor API to capture errors.

Reviewed by: labath

Differential Revision: https://reviews.llvm.org/D83043