[llvm-dev] Introducing debugger tuning for dbx

[Jinsong Ji via llvm-dev]

Hi Franz:

There is currently no plan of supporting lldb on AIX as far as I know.


Best,

Jinsong Ji (纪金松), PhD.

XL/LLVM on Power Compiler Development
E-mail: jji at us.ibm.com



From:	Franz Fehringer via llvm-dev <llvm-dev at lists.llvm.org>
To:	llvm-dev at lists.llvm.org
Date:	03/26/2021 10:05 AM
Subject:	[EXTERNAL] Re: [llvm-dev] Introducing debugger tuning for dbx
Sent by:	"llvm-dev" <llvm-dev-bounces at lists.llvm.org>



While i have no fruitful input regarding your question(s), just out of
curiosity: What ist the state of affairs for lldb on AIX?

Am 26.03.2021 um 14:16 schrieb Zheng CZ Chen via llvm-dev:


      Hi，

      As some of you may know [1]，we are working on AIX support. Part of
      the AIX support is debug support, supporting dbx as the consumer of
      clang DWARF information [2].

      While the dbx team is also working on improving its dwarf support,
      there are limitations in foreseeable future. Also there are
      situations on AIX that end user may not get up to date debugger.

      So we are considering doing some compatibly work in clang/llvm to
      help improving user experience.

      There are some limitations in dbx we know so far:
            .dwstr section is not supported for now;
            column-info in the line table not supported for now;
            sub-optimal handling of unsupported dwarf tags. Eg: dbx support
            dwarf 3, but misbehaving with new DWARF 5 tags
            DW_LANG_C_plus_plus_14 [3].

      As discussed with the reviewers in patch [3], we are considering
      introducing a new tuning debugger tuning option for dbx,
      -debugger-tuning=dbx [4], so that we can change some option
      default on AIX for dbx to accommodate its limitations, eg;
      -gno-column-info.

      Any thoughts about the direction here? Reviews and feedback to [3][4]
      are also appreciated.

      [1]:
      https://lists.llvm.org/pipermail/llvm-dev/2019-February/130175.html
      [2]:
      https://reviews.llvm.org/rGafa76fe67a42f6d40d83a4f7d0cb03373045f3f4
      [3]: https://reviews.llvm.org/D99250
      [4]: https://reviews.llvm.org/D99400

      Thanks!

      BRS//
      Chen Zheng
      Power Compiler Backend Developer


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