Xen devel - Dec 2011 - [help] problem with debuging /tools/ioemu-qemu-xen/xen-vl-extra.c

Hi everyone,
     I added debug info in the function do_savevm of
/tools/ioemu-qemu-xen/xen-vl-extra.c as follow:
  
  
 DBG("going to save...");
ret = qemu_savevm_state(f);
 DBG("save finish...");  
  
 only to see "going to save..." and "save finish..." in the
log file,but I couldn't get the debug output in qemu_savevm_state(f) called
by "do_savevm". Why not?
  
 best regards
 bruce

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On Sat, 2011-12-31 at 12:06 +0000, ¤?K於aware wrote:
> Hi everyone,
>     I added debug info in the function
> do_savevm of /tools/ioemu-qemu-xen/xen-vl-extra.c as follow:
>  
>  
> DBG("going to
> save...");
> ret > qemu_savevm_state(f);
> DBG("save finish...");  
>  
> only to see "going to save..." and "save finish..." in
the log
> file,but I couldn't get the debug output in qemu_savevm_state(f)
> called by "do_savevm". Why not?
>  
What are you expecting to see? If you want to see debug output for
qemu_savevm_state(), you should add some code to do that.

I don't find any DBG() definition in ioemu directory. I guess DBG() is
your customized wrapper around printf(), so it prints whatever you tell
it to print, right?

Another suggestion for your debugging is that you can use gdb to connect
to qemu -- it is just a userspace program.


Wei.



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