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Re: [Qemu-devel] latest qemu with gdb remote not working
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] latest qemu with gdb remote not working |
Date: |
Mon, 03 Jun 2013 09:47:41 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130514 Thunderbird/17.0.6 |
Il 03/06/2013 09:42, Peter Crosthwaite ha scritto:
> Hi Peter and Peter :)
>
> On Sun, Jun 2, 2013 at 7:27 PM, Peter Maydell <address@hidden> wrote:
>> On 2 June 2013 06:46, Peter Cheung <address@hidden> wrote:
>>> I just tried to compile the latest qemu on Fedora 18 64 bits,
>>> it is also fail. When i press "c" in gdb, the qemu won't start
>>> running.
>>
>> Good. This significantly increases the chances that somebody
>> will investigate.
>
> I think I may have replicated as well. qemu-system-arm on Ubuntu 10.04 host.
> And it works again for me after a revert of:
>
> commit 87f25c12bfeaaa0c41fb857713bbc7e8a9b757dc
> Author: Paolo Bonzini <address@hidden>
> Date: Thu May 30 13:20:40 2013 +0200
>
> gdbstub: do not restart crashed guest
>
> If a guest has crashed with an internal error or similar, detaching
> gdb (or any other debugger action) should not restart it.
>
> Cc: Jan Kiszka <address@hidden>
> Signed-off-by: Paolo Bonzini <address@hidden>
> Reviewed-by: Laszlo Ersek <address@hidden>
> Message-id: address@hidden
> Signed-off-by: Anthony Liguori <address@hidden>
Oops, indeed you need to type cont in both gdb and the monitor after
this patch. Funny I didn't notice; the fix should be to use
!runstate_needs_reset() instead of runstate_check(RUN_STATE_DEBUG).
But it is likely a different bug than the Mac OS X one.
Paolo
> Ill dig further before sending through minimal replication
> instructions (gotta run!)
> but Peter Cheung, can you please try your test case after reverting this
> commit,
> to see if its perhaps the same bug?
>
> $ git revert 87f25c12bfeaaa0c41fb857713bbc7e8a9b757dc
>
> Regards,
> Peter
>
>>
>>> But one thing fedora is different than mac, when i connect gdb to qemu, it
>>> won't say "warning: Error 268435459 getting port names from mach_port_names"
>>
>> That looks like a Mac GDB specific issue.
>>
>>> In my mac, i use gcc from mac port, here is the version detail:
>>>
>>> /Users/peter>gcc -v
>>
>>> gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.1.00)
>>
>> This is pretty ancient -- I'd suggest using clang to build
>> QEMU instead. (It probably won't fix your problem here, though.)
>>
>> What command line are you using to configure and build QEMU?
>>
>> thanks
>> -- PMM
>>
Re: [Qemu-devel] latest qemu with gdb remote not working, Peter Cheung, 2013/06/02
Re: [Qemu-devel] latest qemu with gdb remote not working, Eric Blake, 2013/06/03