[Bug gdb/30807] New: Process record does not support instruction 0x62 (AVX512)

[Bug gdb/30807] New: Process record does not support instruction 0x62 (AVX512)

[simon.marchi at polymtl dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=30807

            Bug ID: 30807
           Summary: Process record does not support instruction 0x62
                    (AVX512)
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: simon.marchi at polymtl dot ca
  Target Milestone: ---

This is basically the same as this:

https://sourceware.org/bugzilla/show_bug.cgi?id=23188

... but for AVX512.  I'm seeing this when running gdb.reverse/step-precsave.exp
on a CPU with AVX512 support (AMD EPYC 9634) on Debian 12 (bookworm):

      continue^M
      Continuing.^M
      Process record does not support instruction bound.^M
      Process record does not support instruction 0x62 at address
0x7ffff7f49b40.^M
      Process record: failed to record execution log.^M
      ^M
      Program stopped.^M
      0x00007ffff7f49b40 in ?? () from /lib/x86_64-linux-gnu/libc.so.6^M
      (gdb) FAIL: gdb.reverse/step-precsave.exp: run to end of main

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug gdb/30807] Process record does not support instruction 0x62 (AVX512)

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30807

--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Simon Marchi <simark@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=4fd1ba162ed6f197169d2af29f4230d7a89e2636

commit 4fd1ba162ed6f197169d2af29f4230d7a89e2636
Author: Simon Marchi <simon.marchi@efficios.com>
Date:   Tue Aug 29 12:19:02 2023 -0400

    gdb/testsuite: recognize one more unsupported instruction in
gdb.reverse/step-precsave.exp

    When running this test on a processor that supports AVX512 (AMD EPYC
    9634) on Debian 12 bookwork (system compiler is gcc 12.2.0), I see:

        continue^M
        Continuing.^M
        Process record does not support instruction bound.^M
        Process record does not support instruction 0x62 at address
0x7ffff7f49b40.^M
        Process record: failed to record execution log.^M
        ^M
        Program stopped.^M
        0x00007ffff7f49b40 in ?? () from /lib/x86_64-linux-gnu/libc.so.6^M
        (gdb) FAIL: gdb.reverse/step-precsave.exp: run to end of main

    The instruction at this address is:

       0x00007ffff7f49b40:  62 e2 7d 48 7a c6   vpbroadcastb %esi,%zmm16

    This seems like an AVX512 instruction (given the use of zmm16).  Match
    this byte value in order to produce a KFAIL.

    Change-Id: I1d20357fa538ba60b9c537160acf511a37d751ee
    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=30807
    Approved-By: Tom Tromey <tom@tromey.com>

-- 
You are receiving this mail because:
You are on the CC list for the bug.