Re: [Qemu-devel] qemu-i386 maple apt-get

[Eric Blake <eblake@redhat.com>]

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On 11/18/2015 05:27 AM, Franz-Josef Haider wrote:
> Hi!
> 
> Commit 9f08c8ec73878122ad4b061ed334f0437afaaa32 breaks qemu i386 user
> mode emulation for me (on arm):
> 
> [1|user@Nokia-N900|~]/home/user/MyDocs/maple13_i386/bin/start_cmaple.sh
> qemu: uncaught target signal 11 (Segmentation fault) - core dumped
> /home/user/MyDocs/maple13_i386/bin/start_cmaple.sh: line 1: 16024
> Segmentation fault      LD_LIBRARY_PATH=/home/user/MyDocs/root.i686/lib
> /home/user/MyDocs/maple13_i386/bin/maple
> // root.i686 is an arch linux chroot
> 
> In the likely case you don't own a maple license, you can reproduce this
> with a debian sarge x86 chroot (i have not tested other debian versions,
> but there might be similar results).
> 
> // sarge created on desktop with "debootstrap --no-check-gpg --arch=i386
> sarge /home/krnlyng/sarge http://archive.debian.org/debian/"
> // on device:
> /home/user/MyDocs # cp /usr/bin/qemu-i386 sarge/usr/bin/
> /home/user/MyDocs # chroot sarge
> root@Nokia-N900:/# apt-get update
> qemu: uncaught target signal 11 (Segmentation fault) - core dumped
> Segmentation fault
> root@Nokia-N900:/# qemu: uncaught target signal 11 (Segmentation fault)
> - core dumped
> // core dump:
> http://www.mediafire.com/download/zac5p92o7g2zxo6/qemu_apt-get_20151118-120024_16081.core

Can you obtain a backtrace to show where things are crashing?

> 
> 
> // additional information:
> /home/user/MyDocs # uname -a
> Linux Nokia-N900 2.6.28-omap1 #1 PREEMPT Fri Aug 6 11:50:00 EEST 2010
> armv7l unknown
> 
> // qemu-i386 is built from git master branch (./configure --static
> --prefix=/usr --disable-system)
> root@Nokia-N900:/# qemu-i386 --version
> qemu-i386 version 2.4.90, Copyright (c) 2003-2008 Fabrice Bellard
> 
> with the referenced commit reverted apt-get and maple work fine.

I don't see how that commit would expose any core dumps - it was just
deleting unused code.  Showing more details about the crash would help
diagnose what's going on.

> 
> Please let me know if you need additional information.
> 
> best regards,
> Frajo Haider

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


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