[Wine] Re: Wine unhandled exception running PocketFMS
junkmail at junkmail.com
Mon Mar 19 00:52:20 CDT 2007
Rob Turk wrote:
> I'm trying to get the PocketFMS flight assistant program to work under Wine.
> This program is available for free at www.pocketfms.com .
> The installation of PocketFMS works OK with a few 'fixme' warnings, but
> running the installed program causes an immediate crash. As this program is
> still in development itself and not designed to run on anything but Windows,
> I'd like to know if the information below points to a bug in Wine, or a bug
> in PocketFMS. The host is Slackware 11 with a 188.8.131.52 Linux kernel, and
> Wine is 0.9.28 compiled from source.
> At the bottom there's information generated with WINEDEBUG=+relay set. It
> appears something is wrong with a call to gdi32.StretchDIBits() but I'm not
> enough into Wine debugging to confirm this.
I am not really much of a debugger either, but here is my two cents worth...
> root at slack11:~# wine "c:\program files\pocketfms\pocketfms.exe"
> wine: Unhandled page fault on read access to 0x0465bf70 at address
> 0x7e4ec030 (thread 0009), starting debugger...
> Unhandled exception: page fault on read access to 0x0465bf70 in 32-bit code
So the program crashes on an attempt to read from 0x0465bf70, and the
relay trace shows that indeed a call was made to StretchDIBits with that
value for a BITMAPINFO pointer.
The return value indicates the call was made from within PocketFMS,
rather than from somewhere in Wine.
> Module Address Debug info Name (91 modules)
> PE 400000-6b8000 Export pocketfms
I notice that shortly before the crash, the program locks some resources
near a similar address:
> 0009:Call kernel32.LockResource(0065bf48) ret=0053e9cf
> 0009:Ret kernel32.LockResource() retval=0065bf48 ret=0053e9cf
I find the similarity with the crashing address to be a bit surprising
to be a coincidence. What it all means though, I have no idea ;) It
would appear that for some reason, the program is setting a high order
bit in a pointer address.
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