[Bug record/20456] gdb crash with record and d

["bernhardu at mailbox dot org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=20456

Bernhard Übelacker <bernhardu at mailbox dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bernhardu at mailbox dot org

--- Comment #7 from Bernhard Übelacker <bernhardu at mailbox dot org> ---
I tried to debug in a debian buster amd64 qemu VM the application kalgebra.

There I received that message too:
    (gdb) record
    (gdb) cont
    Continuing.
    /build/gdb-KOFU8D/gdb-8.1/gdb/nat/x86-linux-dregs.c:146:
      internal-error: void x86_linux_update_debug_registers(lwp_info*):
        Assertion `lwp_is_stopped (lwp)' failed.
    A problem internal to GDB has been detected,
    further debugging may prove unreliable.
    Quit this debugging session? (y or n)

I had set one breakpoint before at ConsoleHtml::clear and hit that.
(To reproduce click menu Calculator - Clear.)
kalgebra seems to start around 30 treads.


I tried to find the first version showing that issue in debian and found
- gdb-minimal_7.10-1.1 works
- gdb-minimal_7.11.1-1 fails


A git bisect points to that commit:
398e081380a204e3b9fb4eb4da069ccf471f930e is the first bad commit
commit 398e081380a204e3b9fb4eb4da069ccf471f930e
Author: Pedro Alves <palves@redhat.com>
Date:   Wed Sep 30 19:23:39 2015 +0100

    x86/Linux: reenable all-stop on top of non-stop

    Since the record-btrace target now supports non-stop mode, we no
    longer need to force-disable as-ns on x86.

    gdb/ChangeLog:
    2015-09-30  Pedro Alves  <palves@redhat.com>

        * linux-nat.c (linux_nat_always_non_stop_p): Always return 1.
        * x86-linux-nat.c (x86_linux_always_non_stop_p): Delete.
        (x86_linux_create_target): Don't install
        x86_linux_always_non_stop_p.

:040000 040000 aa77d3a15c409479339b4e70e06a39b37de2e41b
42386dee55ce6dbfc8466dd1f54107d2e1af1949 M      gdb


That patch reverted on the current debian buster gdb-minimal_8.1-4+b1
package makes the assert go away (and seems working for my limited test).


Bugs 21051 and 22368 seem to be about the same issue.

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