[llvm-dev] Introducing debugger tuning for dbx

[Franz Fehringer via llvm-dev]

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 
> <https://lists.llvm.org/pipermail/llvm-dev/2019-February/130175.html>
> [2]: 
> https://reviews.llvm.org/rGafa76fe67a42f6d40d83a4f7d0cb03373045f3f4 
> <https://reviews.llvm.org/rGafa76fe67a42f6d40d83a4f7d0cb03373045f3f4>
> [3]: https://reviews.llvm.org/D99250 <https://reviews.llvm.org/D99250>
> [4]: https://reviews.llvm.org/D99400 <https://reviews.llvm.org/D99400>
>
> Thanks!
>
> BRS//
> Chen Zheng
> Power Compiler Backend Developer
>
>
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> llvm-dev at lists.llvm.org
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