Re: [Qemu-devel] glibc abort if -snapshot is used

On 8/22/06, Andrew Barr <address@hidden> wrote:

Hi,

I am installing some software (iTunes) in my Windows 2000 SP4 virtual
machine. I don't know what it is going to /do/, specifically, to my VM
so I would like to run QEMU in snapshot mode so that I can commit system
changes only if desired. However, when I run qemu like this, I get into
trouble:

address@hidden:~$ qemu -hda .disk/win2k.dsk -m 256 -snapshot -kernel-kqemu
-usb -usbdevice tablet -localtime -smb /home/andrew
*** glibc detected *** double free or corruption (fasttop): 0xAborted

Sometimes it finishes printing the address: 0x09b2c738

The SDL window never comes up, the abort is instanenous. I did a
backtrace but because I built Debian packages debhelper strips the debug
information out, so it doesn't say much. I can rebuild QEMU with debug
information and obtain a proper backtrace if it would be useful to
someone.

This is a QEMU 0.8.2 CVS snapshot of 2006/08/19. I did a 'cvs up' on my
source tree, only the documentation has been updated since then.
Normally I run this VM exactly the same except without the '-snapshot'
parameter. If I remove that, it starts up as expected.

The disk image is QCOW2 and kqemu is 1.3.0pre9 (BTW, '-no-kqemu' without
'-kernel-kqemu' makes no difference)

glibc is 2.3.6-ds1-2 from Debian sid. QEMU was compiled with GCC 3.4.6
also from Debian.

--
Andrew Barr | http://www.oakcourt.dyndns.org/~andrew/

All parts should go together without forcing. You must remember that
the parts you are reassembling were disassembled by you. Therefore, if
you can't get them together again, there must be a reason. By all
means, do not use a hammer.
-- IBM maintenance manual (1925)

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From:	Rene Horn
Subject:	Re: [Qemu-devel] glibc abort if -snapshot is used
Date:	Tue, 22 Aug 2006 22:40:47 -0500