[PATCH] D124082: [Debuginfo][llvm-dwarfdump][dsymutil] Add dsymutil compatibility dump.

[Alexey Lapshin via Phabricator via llvm-commits]

avl created this revision.
avl added reviewers: aprantl, JDevlieghere, clayborg, jhenderson, dblaikie, probinson.
Herald added subscribers: cmtice, hiraditya, mgorny.
Herald added a project: All.
avl requested review of this revision.
Herald added subscribers: llvm-commits, MaskRay.
Herald added a project: LLVM.

This patch adds a new kind of dump into the llvm-dwarfdump utility.
This new kind of dump can be used to compare semantically the same but
binary different DWARF files produced by dsymutil. f.e. these two should match:

dsymutil intput-file -o - | llvm-dwarfdump --dsymutil-compat-dump - -o - | md5
dsymutil --no-odr intput-file -o - | llvm-dwarfdump --dsymutil-compat-dump - -o - | md5

The idea of the dump is that it skips type dies. Instead, it prints type names.
Additionally, it skips dies offsets, strings offsets, etc...

"llvm-dwarfdump -a":

0x0000002a:   DW_TAG_class_type

  DW_AT_name      ("class1")

0x00000071:   DW_TAG_subprogram

  DW_AT_name      ("foo1")
  DW_AT_low_pc    (0x0000000000001000)
  DW_AT_high_pc   (0x0000000000001010)
  DW_AT_type      (0x0000002a "class1")

"llvm-dwarfdump --dsymutil-compat-dump":

  == DW_TAG_subprogram [1]
     DW_AT_name "foo1"
     DW_AT_low_pc 0x0000000000001000
     DW_AT_high_pc 0x0000000000001010
     DW_AT_type "class1"

use cases for this dump:

1. to compare result produced by "dsymutil" and "dsymutil --no-odr".
2. to compare result produced by current upstream dsymutil and another one from https://reviews.llvm.org/D86539.
3. to compare result produced by current upstream dsymutil and another one from https://reviews.llvm.org/D96035.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D124082

Files:
  llvm/include/llvm/DebugInfo/DWARF/DWARFDebugLoc.h
  llvm/lib/DebugInfo/DWARF/DWARFDebugLoc.cpp
  llvm/test/tools/llvm-dwarfdump/dsymutil-compat/basic.yaml
  llvm/test/tools/llvm-dwarfdump/dsymutil-compat/loc.yaml
  llvm/test/tools/llvm-dwarfdump/dsymutil-compat/loclists.yaml
  llvm/test/tools/llvm-dwarfdump/dsymutil-compat/ranges-error.yaml
  llvm/test/tools/llvm-dwarfdump/dsymutil-compat/ranges.yaml
  llvm/test/tools/llvm-dwarfdump/dsymutil-compat/rnglists.yaml
  llvm/test/tools/llvm-dwarfdump/dsymutil-compat/specification.yaml
  llvm/tools/llvm-dwarfdump/CMakeLists.txt
  llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D124082.423860.patch
Type: text/x-patch
Size: 39177 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20220420/a774b447/attachment.bin>