Stop emitting .debug_pubnames and .debug_pubtypes into Linux object files and binaries #48762

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1. emilyalbini

   added

   O-linuxOperating system: LinuxOperating system: Linux

   A-debuginfoArea: Debugging information in compiled programs (DWARF, PDB, etc.)Area: Debugging information in compiled programs (DWARF, PDB, etc.)

   C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

   T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

   on Mar 6, 2018
2. sfackler

   removed

   O-linuxOperating system: LinuxOperating system: Linux

   on Mar 7, 2018
3. sfackler commented on Mar 7, 2018

   

   sfackler

   on Mar 7, 2018

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   It seems like gcc and clang don't emit these anymore, so it'd probably make sense for us to skip them as well.
4. tromey commented on Nov 15, 2018

   

   tromey

   on Nov 15, 2018

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   I have a patch for this but I'm still looking at how to write a test for it.
5. tromey commented on Nov 16, 2018

   

   tromey

   on Nov 16, 2018

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   I learned on #llvm that these sections may be read by lld to create a .gdb_index section. So perhaps they are desirable after all. I'll look into lld to see.
6. tromey commented on Nov 16, 2018

   

   tromey

   on Nov 16, 2018

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   .debug_pubnames and .debug_pubtypes are indeed read by lld when --gdb-index is given. This doesn't appear to be the default. This emits an index that speeds up gdb symbol reading. So, it seems that Linux is the platform where these sections might be useful. However, since it requires a linker flag, perhaps the thing to do is just drop this everywhere.
7. DenialAdams commented on Nov 16, 2018

   

   DenialAdams

   on Nov 16, 2018

   Last edited by DenialAdams

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   .debug_pubnames and .debug_pubtypes are indeed read by lld when --gdb-index is given. This doesn't appear to be the default. This emits an index that speeds up gdb symbol reading. So, it seems that Linux is the platform where these sections might be useful. However, since it requires a linker flag, perhaps the thing to do is just drop this everywhere.

   It seems like we could put emitting them behind a rustc flag by default, but add a cargo option that causes them to be emitted and turns the linker flag on?
8. tromey commented on Nov 19, 2018

   

   tromey

   on Nov 19, 2018

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   It seems like we could skip emitting them by default, but add a cargo option that causes them to be emitted and turns the linker flag on?

   Yeah, that could be done. I have other priorities, though, so I'm going to drop this for now. I can share my rustc patch if anybody wants to pick it up.
9. tromey

   added a commit that references this issue on Jan 15, 2019

   Do not emit .debug_pubnames on Linux

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   This issue will close once commit 47b2154 is merged into the 'master' branch.

   47b2154
10. khuey commented on Mar 20, 2019

    

    khuey

    on Mar 20, 2019

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    What blocks landing this?

    👍React with 👍4Reacted by Lukas Kalbertodt, Robert O'Callahan, Federico Poli and 0x676e67
11. jonas-schievink

    added

    I-compiletimeIssue: Problems and improvements with respect to compile times.Issue: Problems and improvements with respect to compile times.

    I-heavyIssue: Problems and improvements with respect to binary size of generated code.Issue: Problems and improvements with respect to binary size of generated code.

    on Apr 18, 2020
12. pnkfelix

    self-assigned this

    on Apr 5, 2021
13. wesleywiser

    self-assigned this

    on Aug 21, 2023
14. bors

    added a commit that references this issue on Nov 17, 2023

    Auto merge of rust-lang#117962 - weihanglo:debug-name-table, r=<try>

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    This issue will close once commit 5432eb3 is merged into the 'master' branch.

    5432eb3
15. bors

    added 2 commits that reference this issue on Dec 11, 2023

    Auto merge of rust-lang#117962 - weihanglo:debug-name-table, r=<try>

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    This issue will close once commit 7db8714 is merged into the 'master' branch.

    7db8714

    Auto merge of rust-lang#117962 - weihanglo:debug-name-table, r=wesley…

    ...

    This issue will close once commit e2a3c9b is merged into the 'master' branch.

    e2a3c9b
16. bors

    closed this as completedin e2a3c9bon Dec 12, 2023
17. modularbot

    added a commit that references this issue on May 1, 2025

    [KGEN][DebugInfo][GPU] No debug name tables for nvptx (#37720)

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    d4e3019
18. lriggs1311

    added a commit that references this issue on May 1, 2025

    [KGEN][DebugInfo][GPU] No debug name tables for nvptx (#37720)

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    a2a5a5b
19. robinber

    added a commit that references this issue on Aug 18, 2026

    [KGEN][DebugInfo][GPU] No debug name tables for nvptx (#37720)

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    9a18acd