[Bug 890] Virtual Pages difference - Spotted with VirtualQuery()
Wine Bugs
wine-bugs at winehq.com
Fri Jun 20 08:08:36 CDT 2003
http://bugs.winehq.com/show_bug.cgi?id=890
------- Additional Comments From z_god at wanadoo.nl 2003-20-06 08:08 -------
Bug comments from Gmane.org:
As usual, AutoCAD seems to be a good test-bench for wine :-)
I spotted the problem that seemed coming from VirtualQuety function, but
that is (I guess... hmmmm) more a problem of memory handling in wine.
I made a little test app; here the results in wine and win2k, later on
the app itself :
WINE RESULTS :
Memory info about '004012F0' :
Base Address : 00401000
Allocation Base : 00400000
Allocation Protect : PAGE_READONLY | PAGE_WRITECOPY |
PAGE_EXECUTE_READWRITE | PAGE_NOACCESS
Region Size : 00017000
State : MEM_COMMIT
Protect : PAGE_WRITECOPY <----- HERE
Type : MEM_PRIVATE
WIN2k RESULTS :
Memory info about '004012F0' :
Base Address : 00401000
Allocation Base : 00400000
Allocation Protect : PAGE_EXECUTE_WRITECOPY
Region Size : 00001000
State : MEM_COMMIT
Protect : PAGE_EXECUTE_READ <---- AND HERE
Type : MEM_IMAGE
Well, dunno too much about Type field, I didn't find an app that check it yet;
I did find the app that uses Protect flag; I think it's poor coded, but as
usual we should make bad apps work too :-)
The app put some data in code page, not yet spotted if hard or soft-coded,
then before reading it checks Protect field to see if it has not set the
PAGE_GUARD, NO_ACCESS and WRITECOPY flags; if t has, it hangs some 10.000
lines later (sigh....)
I think wine should set Protect flag quite as like as possible as windoze
For AutoCAD2000 I put a dirty hack in process.c, but is really ugly; i'd
prefer not to put my hands (bytes ?) too deeply inside some code that I don't
understand completely...
Attached is the test source (compiled in Borland CBuilder, but should work
with any compiler, apart some unuseful pragma's).
If needed I can post the compiled too :-)
------- Additional Comments From maxx2 <at> veneto.com 2002-07-18 03:09 -------
Created an attachment (id=232)
--> (http://bugs.winehq.com/attachment.cgi?id=232&action=view)
C++ Test app for bug 890
------- Additional Comments From maxx2 <at> veneto.com 2002-07-19 14:42 -------
Just submitted a Patch on wine-patches that seems to solve the problem.
--
Configure bugmail: http://bugs.winehq.com/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
More information about the wine-bugs
mailing list