Re: [Qemu-devel] [Bug 1191606] Re: qemu crashes with iscsi initiator (libiscsi) when using virtio

[Laszlo Ersek]

On 06/18/13 11:38, Stefan Hajnoczi wrote:
> On Mon, Jun 17, 2013 at 05:37:57PM -0000, Klaus Hochlehnert wrote:
>> Without debug information I just can provide this (on that server I
>> can't recompile qemu with debugging information):
>>
>> warning: no loadable sections found in added symbol-file system-supplied DSO 
>> at 0x7fffe67fe000
>> 0x00007f1bca857313 in poll () from /lib/x86_64-linux-gnu/libc.so.6
>> (gdb) c
>> Continuing.
>> [New Thread 0x7f1bb9a64700 (LWP 36180)]
>> [Thread 0x7f1bb9a64700 (LWP 36180) exited]
>> [New Thread 0x7f1bb9a64700 (LWP 36181)]
>> [Thread 0x7f1bb9a64700 (LWP 36181) exited]
>> [New Thread 0x7f1bb9a64700 (LWP 36207)]
>>
>> Program received signal SIGABRT, Aborted.
>> 0x00007f1bca7a5425 in raise () from /lib/x86_64-linux-gnu/libc.so.6
> 
> The program invoked abort(3).  This is a deliberate fatal error case.
> 
> If you're using distro packages, please do the backtrace without symbols
> ("bt" and "info proc mappings") when gdb stops with SIGABRT and post the
> package version and distro you are using.
> 
> Then I'll download the debuginfo packages from the distro and look up
> the symbols manually.
> 
> If you're using a QEMU built from source then I would need the symbols
> from you.

Yes. Yesterday I started responding to this report along the same lines
-- SIGABRT + raise() is assert() or abort(), but there was no error
message, hence abort().

Also, the reporter said in the opening comment that he used

  Host OS: Ubuntu 12.04 with 13.04-Kernel (3.8)

which does ship a debuginfo package for qemu-kvm ("qemu-kvm-dbgsym"),
just some extra repos are needed:

  https://wiki.ubuntu.com/DebuggingProgramCrash#Debug_Symbol_Packages

Thus I wanted to recommend the reporter to install the debuginfo package
and reproduce the crash (as this would not require him to rebuild anything).

And that's when I noticed

  qemu version 1.5.0

(which is not Ubuntu's pristine version in the 12.04 release, ie. it's
probably a manual build), *with*

  on that server I can't recompile qemu with debugging information

and decided it was a lost cause and deleted my email.

Cheers,
Laszlo