GDB 15.1 release update (2024-04-14)

GDB 15.1 release update (2024-04-14)

[Joel Brobecker]

Hi everyone,

Below is a quick overview of where we stand in terms of known issues.
One new item got added to the list but I have good confidence this
new one will be resolved soon (v5 patch series is out, and one contributor
thought it looked good).

On the 4 remaining issues that we identified as blocking, I may have
missed some messages, but so far as I can tell, I did not see any update
on them. For those which have been without update the longest, I've
sent a small request for an update.

At this state the schedule is follow:

  - Pre-release: As soon as all blocking issues are solved.
  - Release (15.1): Two weeks after pre-release.

As always, please let us know if there are other issues we should
fix before releasing.

Fixed Since the Previous Update:
--------------------------------

  < none >

Added Since the Last Update:
----------------------------

  * [TomDV] symtab/31268
    gdb.base/unwind-on-each-insn-amd64.exp regression
    https://sourceware.org/bugzilla/show_bug.cgi?id=31268

    v5 patch series here (2024-04-09):
    https://sourceware.org/pipermail/gdb-patches/2024-April/207959.html

Other Ongoing Items:
--------------------

  * [<unassigned>] symtab/30520
    Slow lookup_symbol_in_objfile
    https://sourceware.org/bugzilla/show_bug.cgi?id=30520

        (no change since Feb 15)

        Feb patch series (v2, 2024-02-15):
        https://sourceware.org/pipermail/gdb-patches/2024-February/206442.html

        IIUC, there is an agreement between author and reviewer about
        the (small) required changes. But copyright assignment papers
        are still waiting to be signed.

  * [TomT] gdb/31261
    [gdb] ThreadSanitizer: data race objfiles.c:648 in objfile_relocate1
    https://sourceware.org/bugzilla/show_bug.cgi?id=31261

        Fix race in DWARF reader (2024-02-17):
        https://sourceware.org/pipermail/gdb-patches/2024-February/206633.html
        (Tom sent another email 2024-04-03 sharing more of his thoughts,
        and also saying he's appreciate insights if we have some)

  * [TomT] gdb/31264
    [gdb] ThreadSanitizer: data race format.c:132 in bfd_preserve_save
    https://sourceware.org/bugzilla/show_bug.cgi?id=31264

        New binutils patch series (2024-03-24):
        https://sourceware.org/pipermail/binutils/2024-March/133155.html

  * [CarlEL/ThiagoB] testsuite/31312
    attach-many-short-lived-threads gives inconsistent results (POWER 10)
    https://sourceware.org/bugzilla/show_bug.cgi?id=31312

        Looked like the discussions have reached a consensus of accepting
        this failure (2024-03-09), but there was a second questin that
        wasn't wasn't understood yet, so Carl tried to dig deeper.
        Meanwhile, Thiago indicated he's seeing the same kind of behavior
        on AArch64 Linux (sometimes), and now has some leads he is
        pursuing (go Thiago!)

        Thiago posted a patch series that fixes the problem, but
        with one known regression he hasn't had time to investigate:
        https://sourceware.org/pipermail/gdb-patches/2024-March/207467.html

        Pedro suggested an alternative approach to fix the problem,
        which Thiago tried, but unfortunately created another issue.
        To be investigated further.

Not Blocking, But Keep An Eye On:
---------------------------------

  * [TomT and/or SimonM] gdb/31331
    Wenum-constexpr-conversion should be fixed, soon treated as a hard error
    https://sourceware.org/bugzilla/show_bug.cgi?id=31331

        Last update was 2024-02-13.
        Marked as targeting 15.1, but not sure this one is blocking
        for 15.1...

  * [Thiago]
    various improvements to aarch64 MOPS (Memory Operations)

    Related to this enhancement, there is a gdb/testsuite PR
    to add watchpoint tests for those:
    https://sourceware.org/bugzilla/show_bug.cgi?id=31484

-- 
Joel

Re: GDB 15.1 release update (2024-04-14)

[Tom Tromey]

>>>>> "Joel" == Joel Brobecker <brobecker@adacore.com> writes:

Joel>   * [<unassigned>] symtab/30520
Joel>     Slow lookup_symbol_in_objfile
Joel>     https://sourceware.org/bugzilla/show_bug.cgi?id=30520

Joel>         (no change since Feb 15)

We're waiting on copyright assignment; I asked the other day and there's
been a bit of progress.

Joel>   * [TomT] gdb/31261
Joel>     [gdb] ThreadSanitizer: data race objfiles.c:648 in objfile_relocate1
Joel>     https://sourceware.org/bugzilla/show_bug.cgi?id=31261

I sent a completely different (and simpler) fix for this bug.  In the
absence of review, eventually I'll check it in.

Joel>   * [TomT] gdb/31264
Joel>     [gdb] ThreadSanitizer: data race format.c:132 in bfd_preserve_save
Joel>     https://sourceware.org/bugzilla/show_bug.cgi?id=31264

This is in.

Joel>   * [TomT and/or SimonM] gdb/31331
Joel>     Wenum-constexpr-conversion should be fixed, soon treated as a hard error
Joel>     https://sourceware.org/bugzilla/show_bug.cgi?id=31331

Joel>         Last update was 2024-02-13.
Joel>         Marked as targeting 15.1, but not sure this one is blocking
Joel>         for 15.1...

I think we should remove the target milestone.
No one is actively working on this.

Tom

Re: GDB 15.1 release update (2024-04-14)

[Joel Brobecker]

Hi Tom,

> Joel>   * [TomT] gdb/31261
> Joel>     [gdb] ThreadSanitizer: data race objfiles.c:648 in objfile_relocate1
> Joel>     https://sourceware.org/bugzilla/show_bug.cgi?id=31261
> 
> I sent a completely different (and simpler) fix for this bug.  In the
> absence of review, eventually I'll check it in.

Nice :-). Thanks for that.

> Joel>   * [TomT] gdb/31264
> Joel>     [gdb] ThreadSanitizer: data race format.c:132 in bfd_preserve_save
> Joel>     https://sourceware.org/bugzilla/show_bug.cgi?id=31264
> 
> This is in.

Great! Thanks again, Tom.

> Joel>   * [TomT and/or SimonM] gdb/31331
> Joel>     Wenum-constexpr-conversion should be fixed, soon treated as a hard error
> Joel>     https://sourceware.org/bugzilla/show_bug.cgi?id=31331
> 
> Joel>         Last update was 2024-02-13.
> Joel>         Marked as targeting 15.1, but not sure this one is blocking
> Joel>         for 15.1...
> 
> I think we should remove the target milestone.
> No one is actively working on this.

Agreed and done.

-- 
Joel