Re: [Qemu-devel] latest qemu with gdb remote not working

[Peter Cheung]

Hi Peter

   I just git pull the latest code, the gdb still fail to run after sending a "c" command.

Thanks

from Peter

> Date: Mon, 3 Jun 2013 09:47:41 +0200
> From: address@hidden
> To: address@hidden
> CC: address@hidden; address@hidden; address@hidden
> Subject: Re: [Qemu-devel] latest qemu with gdb remote not working
>
> 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
> >>
>
>