[Qemu-devel] Debugging Qemu binary on Win32

[Qemu-devel] Debugging Qemu binary on Win32

[Robert Riebisch]

Hi!

How can I debug my Qemu SVN binary on Win32? When I remove flags "-O2"
or "-fomit-frame-pointer" Qemu.exe doesn't build anymore. :-(

Or how do I enable debug output for all components?

Background: Qemu.exe crashes here when doing an anti-virus file scan
using the "Avira Rescue System" ISO. Or is the problem in using GCC 3.4.5?

Robert Riebisch
-- 
BTTR Software
http://www.bttr-software.de/

Re: [Qemu-devel] Debugging Qemu binary on Win32

[Robert Riebisch]

Robert Riebisch wrote:

> Background: Qemu.exe crashes here when doing an anti-virus file scan
> using the "Avira Rescue System" ISO. Or is the problem in using GCC 3.4.5?

Using Gdb on the default Qemu.exe gave me function name
bdrv_aio_rw_vector_cb(). Looking at this function in block.c I
remembered Alex Ivanov's recent message
<http://lists.gnu.org/archive/html/qemu-devel/2009-02/msg01543.html>.

I tried it and guess what! The bug has been gone! This is reproducible!

Robert Riebisch
-- 
BTTR Software
http://www.bttr-software.de/

[Qemu-devel] Re: Debugging Qemu binary on Win32

[Alex]

"Robert Riebisch" <rr@bttr-software.de> wrote in message 
news:49A9A69F.6000309@bttr-software.de...
> Hi!
>
> How can I debug my Qemu SVN binary on Win32? When I remove flags "-O2"
> or "-fomit-frame-pointer" Qemu.exe doesn't build anymore. :-(


I've seen this problem with old mingw. GCC4 with all latest mingw libs 
compiles it with -O0.

-- 
Alex.

Re: [Qemu-devel] Re: Debugging Qemu binary on Win32

[Robert Riebisch]

Alex wrote:

>> How can I debug my Qemu SVN binary on Win32? When I remove flags "-O2"
>> or "-fomit-frame-pointer" Qemu.exe doesn't build anymore. :-(
> 
> I've seen this problem with old mingw. GCC4 with all latest mingw libs 
> compiles it with -O0.

But there's no official MinGW GCC 4.

Robert Riebisch
-- 
BTTR Software
http://www.bttr-software.de/

Re: [Qemu-devel] Re: Debugging Qemu binary on Win32

[Doug Schaefer]

Robert Riebisch wrote:
> Alex wrote:
>
>   
>>> How can I debug my Qemu SVN binary on Win32? When I remove flags "-O2"
>>> or "-fomit-frame-pointer" Qemu.exe doesn't build anymore. :-(
>>>       
>> I've seen this problem with old mingw. GCC4 with all latest mingw libs 
>> compiles it with -O0.
>>     
>
> But there's no official MinGW GCC 4.
>
> Robert Riebisch
>   

I'm using the one from tdragon.net and it's working great, so far...

Doug.

Re: [Qemu-devel] Re: Debugging Qemu binary on Win32

[Johannes Schindelin]

Hi,

On Sun, 1 Mar 2009, Robert Riebisch wrote:

> Alex wrote:
> 
> >> How can I debug my Qemu SVN binary on Win32? When I remove flags 
> >> "-O2" or "-fomit-frame-pointer" Qemu.exe doesn't build anymore. :-(
> > 
> > I've seen this problem with old mingw. GCC4 with all latest mingw libs 
> > compiles it with -O0.
> 
> But there's no official MinGW GCC 4.

Somebody pointed out the semi-official GCC4 for MinGW on the msysGit 
mailing list:

http://www.tdragon.net/recentgcc/

Apparently, a few MinGWsters use it.

Ciao,
Dscho

[Qemu-devel] Re: Re: Debugging Qemu binary on Win32

[Alex]

-- 
Alex.

"Johannes Schindelin" <Johannes.Schindelin@gmx.de> wrote in message 
news:alpine.DEB.1.00.0903012223450.10279@pacific.mpi-cbg.de...
> Hi,
>
> On Sun, 1 Mar 2009, Robert Riebisch wrote:
>
>> Alex wrote:
>>
>> >> How can I debug my Qemu SVN binary on Win32? When I remove flags
>> >> "-O2" or "-fomit-frame-pointer" Qemu.exe doesn't build anymore. :-(
>> >
>> > I've seen this problem with old mingw. GCC4 with all latest mingw libs
>> > compiles it with -O0.
>>
>> But there's no official MinGW GCC 4.
>
> Somebody pointed out the semi-official GCC4 for MinGW on the msysGit
> mailing list:
>
> http://www.tdragon.net/recentgcc/
>
> Apparently, a few MinGWsters use it.
>
> Ciao,
> Dscho
>
>


I use this:
http://sourceforge.net/project/showfiles.php?group_id=2435&package_id=241304&release_id=596917

Technically, it is still in alpha, but at least it works. 

Re: [Qemu-devel] Re: Debugging Qemu binary on Win32

[Stefan Weil]

Robert Riebisch schrieb:
> Alex wrote:
>
>   
>>> How can I debug my Qemu SVN binary on Win32? When I remove flags "-O2"
>>> or "-fomit-frame-pointer" Qemu.exe doesn't build anymore. :-(
>>>       
>> I've seen this problem with old mingw. GCC4 with all latest mingw libs 
>> compiles it with -O0.
>>     
>
> But there's no official MinGW GCC 4.
>
> Robert Riebisch
>   


Debian's mingw32 (4.2.1.dfsg-1) contains i586-mingw32msvc-gcc 4.2.1.
I use it to check Windows compilation without leaving my Linux environment.

Regards

Stefan Weil