Re: [Qemu-devel] Segfault installing Windows XP 32 Bit guest on Linux 64Bit host

[Brad Campbell <brad@wasp.net.au>]

andrzej zaborowski wrote:
> On 30/05/2008, Brad Campbell <brad@wasp.net.au> wrote:
>> (gdb) run
>>  Starting program: /home/brad/bin/qemu -fda /tmp/fd.img -hda
>> /home/brad/qemu/xptest.img -cdrom /raid3/isos/XP-corp-sp2.iso -localtime -m
>> 256 -usb -usbdevice tablet -std-vga -no-acpi -vnc :2 -boot d -no-reboot
>> -no-kqemu
>>  Failed to read a valid object file image from memory.
>>  [Thread debugging using libthread_db enabled]
>>  [New Thread 139849118447312 (LWP 9558)]
>>  [New Thread 1098533216 (LWP 9561)]
>>
>>  Program received signal SIGUSR2, User defined signal 2.
> 
> I'm afraid this is not the backtrace you want.  You need to ignore
> SIGUSR2 and continue until the SIGSEGV:
> 
> (gdb) handle SIGUSR2 nostop noprint pass
> (gdb) c
> (gdb) bt
> 
> HTH

Thanks Paul, that helped greatly!

Program received signal SIGUSR2, User defined signal 2.
[Switching to Thread 140040879920848 (LWP 15924)]
0x00007f5dce73cffd in __lll_mutex_unlock_wake () from /lib/libpthread.so.0
(gdb) handle SIGUSR2 nostop noprint pass
Signal        Stop	Print	Pass to program	Description
SIGUSR2       No	No	Yes		User defined signal 2
(gdb) c
Continuing.

Program received signal SIGSEGV, Segmentation fault.
0x000000000046d5a5 in vnc_update_client (opaque=0x7f5db8e99000) at vnc.c:536
536			    if (memcmp(old_ptr, ptr, 16 * vs->depth) == 0) {
(gdb) bt
#0  0x000000000046d5a5 in vnc_update_client (opaque=0x7f5db8e99000)
     at vnc.c:536
#1  0x000000000040668c in qemu_run_timers (ptimer_head=0x688cc0,
     current_time=9750412) at /home/brad/src/qemu/vl.c:1077
#2  0x000000000040ca0c in main_loop_wait (timeout=0)
     at /home/brad/src/qemu/vl.c:7043
#3  0x000000000040fa15 in main (argc=21, argv=0x0)
     at /home/brad/src/qemu/vl.c:7133


I'm running this on a headless machine and don't have libSDL installed (compiled with 
--disable-gfx-check) and I'll lay odds it's something weird here..
I'm getting this with Ubuntu guest also now, so it's easier for me to track down!

Regards,
Brad
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