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Subject: Re: gdb in CURRENT cannot debug userland cores,
 when is kernel lldb coming?
From: Craig Rodrigues <rodrigc@FreeBSD.org>
To: Dimitry Andric <dim@freebsd.org>
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Cc: Glen Barber <gjb@freebsd.org>, freebsd-toolchain@freebsd.org,
 freebsd-arch <freebsd-arch@freebsd.org>
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On Wed, Jun 11, 2014 at 12:30 PM, Dimitry Andric <dim@freebsd.org> wrote:
> On 11 Jun 2014, at 20:53, Craig Rodrigues <rodrigc@FreeBSD.org> wrote:
>>
>> Recently when trying to debug some coredumps in CURRENT from
>> a userland process in the devel/libvirt port, I found that the gdb in
>> base could not get a backtrace from the core file:
>>
>> http://lists.freebsd.org/pipermail/freebsd-virtualization/2014-June/002606.html
>
> Can you please post the output of the following?
>
> objdump -W /usr/local/sbin/libvirtd | head
>
> -Dimitry
>

$ objdump -W /usr/local/sbin/libvirtd | head

/usr/local/sbin/libvirtd:     file format elf64-x86-64-freebsd

The section .debug_aranges contains:

  Length:                   92
  Version:                  2
  Offset into .debug_info:  0
  Pointer Size:             8
  Segment Size:             0


--
Craig