[DUG] Debugging on TS

Rohit Gupta rohit at cfl.co.nz
Fri Jul 29 16:46:42 NZST 2005 

After removing all instances of ProcessMessages in the chain of 
execution the problem still happpens.  The only common thing is 
that the last event is Buttonup....   Yes we have been here before.

One of the major flaws in windoze... where the btnclick closes a 
form the btnup event can go to some other form.

If I alter the form so that a click on the panel closes the form (just 
the same way the button would do) then everything works fine.  If 
the button is pressed then we have this silly exception.

I am still a bit dubious about multiple instances of comctl32.  There 
are infact three copies on the TS server - all different.

From:           	"Rohit Gupta" <rohit at cfl.co.nz>
Organization:   	Computer Fanatics Ltd
To:             	NZ Borland Developers Group - Delphi List <delphi at ns3.123.co.nz>
Date sent:      	Fri, 29 Jul 2005 09:34:30 +1200
Subject:        	RE: [DUG] Debugging on TS
Priority:       	normal
Send reply to:  	rohit at cfl.co.nz,
  	NZ Borland Developers Group - Delphi List <delphi at ns3.123.co.nz>
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Max,

>From the name of function/procedure in ntdll it was obvious that it 
was context switch.  But I had not suspected Reschedule_Thread.  I 
will try it out shortly.... bearing in mind that if the problem disappears 
it doesnt prove anything.  :-)

In the meantime I have removed two threads created by the 
coloured button components that we use.  It was a frivolous use of 
the thread and its gone... but the problem remains.

Finally, if you look at this dump of dlls.  Why is comctl32 in twice - 
and two different versions ?  At present I suspect this more.  For a 
normal environment I would say this is a no no.... but TS... who 
knows.


modules:
00400000 vetlink.exe                 c:\vl2\livedata
10000000 gds32.dll    6.3.0.4288     C:\WINDOWS\system32
4b750000 hhctrl.ocx   5.2.3790.2427  C:\WINDOWS\system32
5ccf0000 SAMLIB.dll   5.2.3790.1830  C:\WINDOWS\System32
5e9a0000 olepro32.dll 5.2.3790.1830  C:\WINDOWS\system32
5f120000 ntlanman.dll 5.2.3790.1830  C:\WINDOWS\System32
5f270000 hnetcfg.dll  5.2.3790.1830  C:\WINDOWS\system32
5f860000 NETUI1.dll   5.2.3790.0     C:\WINDOWS\System32
5f8a0000 NETUI0.dll   5.2.3790.0     C:\WINDOWS\System32
71ae0000 wshtcpip.dll 5.2.3790.0     C:\WINDOWS\System32
71b20000 mswsock.dll  5.2.3790.1830  C:\WINDOWS\System32
71b70000 uxtheme.dll  6.0.3790.1830  C:\WINDOWS\system32
71bb0000 wsock32.dll  5.2.3790.0     C:\WINDOWS\system32
71bc0000 rdpsnd.dll   5.2.3790.0     C:\WINDOWS\system32
71bd0000 mpr.dll      5.2.3790.0     C:\WINDOWS\system32
71bf0000 WS2HELP.dll  5.2.3790.1830  C:\WINDOWS\system32
71c00000 WS2_32.dll   5.2.3790.1830  C:\WINDOWS\system32
71c20000 tsappcmp.dll 5.2.3790.1830  C:\WINDOWS\system32
71c40000 NETAPI32.dll 5.2.3790.1830  C:\WINDOWS\system32
73070000 winspool.drv 5.2.3790.1830  C:\WINDOWS\system32
73440000 RICHED32.DLL 5.2.3790.0     C:\WINDOWS\system32
74b40000 oledlg.dll   5.2.3790.0     C:\WINDOWS\system32
74c40000 RICHED20.DLL 5.31.23.1224   C:\WINDOWS\system32
75e90000 drprov.dll   5.2.3790.1830  C:\WINDOWS\System32
75ea0000 davclnt.dll  5.2.3790.0     C:\WINDOWS\System32
76290000 imm32.dll    5.2.3790.1830  C:\WINDOWS\system32
762b0000 comdlg32.dll 6.0.3790.1830  C:\WINDOWS\system32
767a0000 UNIDRVUI.DLL 0.3.3790.1830  
C:\WINDOWS\system32\spool\DRIVERS\W32X86\3
76aa0000 winmm.dll    5.2.3790.1830  C:\WINDOWS\system32
76b70000 PSAPI.DLL    5.2.3790.1830  C:\WINDOWS\system32
76ed0000 DNSAPI.dll   5.2.3790.1830  C:\WINDOWS\system32
76f00000 wtsapi32.dll 5.2.3790.1830  C:\WINDOWS\system32
76f10000 WLDAP32.dll  5.2.3790.1830  C:\WINDOWS\system32
76f50000 Secur32.dll  5.2.3790.1830  C:\WINDOWS\system32
76f70000 winrnr.dll   5.2.3790.1830  C:\WINDOWS\System32
76f80000 rasadhlp.dll 5.2.3790.1830  C:\WINDOWS\system32
771f0000 WINSTA.dll   5.2.3790.1830  C:\WINDOWS\system32
77380000 user32.dll   5.2.3790.1830  C:\WINDOWS\system32
77420000 comctl32.dll 6.0.3790.1830  
C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-
Controls_6595b64144ccf1df_6.0.3790.1830_x-ww_7AE38CCF
77530000 comctl32.dll 5.82.3790.1830 
C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-
Controls_6595b64144ccf1df_5.82.3790.1830_x-ww_1B6F474A
77670000 ole32.dll    5.2.3790.1830  C:\WINDOWS\system32
77b90000 version.dll  5.2.3790.1830  C:\WINDOWS\system32
77ba0000 msvcrt.dll   7.0.3790.1830  C:\WINDOWS\system32
77c00000 GDI32.dll    5.2.3790.1830  C:\WINDOWS\system32
77c50000 RPCRT4.dll   5.2.3790.1830  C:\WINDOWS\system32
77d00000 oleaut32.dll 5.2.3790.1830  C:\WINDOWS\system32
77da0000 SHLWAPI.dll  6.0.3790.2440  C:\WINDOWS\system32
77e40000 kernel32.dll 5.2.3790.1830  C:\WINDOWS\system32
77f50000 ADVAPI32.dll 5.2.3790.1830  C:\WINDOWS\system32
780c0000 MSVCP60.dll  6.5.2144.0     C:\WINDOWS\system32
7c800000 ntdll.dll    5.2.3790.1830  C:\WINDOWS\system32
7c8d0000 shell32.dll  6.0.3790.1830  C:\WINDOWS\system32


From:           	"Max Nilson" <mnilson at xtra.co.nz>
To:             	<rohit at cfl.co.nz>,
  	"'NZ Borland Developers Group - Delphi List'" <delphi at ns3.123.co.nz>
Subject:        	RE: [DUG] Debugging on TS
Date sent:      	Thu, 28 Jul 2005 19:30:38 +1200
Organization:   	Profax International Limited
Send reply to:  	mnilson at xtra.co.nz

Rohit asked:

> Heres a dump from madshit.   Any clues anyone ?  It appears 
> to be inside ntdll.

Looks like your code is going reentrant. Your Reschedule_Thread is causing
it, and I'm assuming that you want it to do this, but it has been a
persistent source of errors in our application for years now. Just when you
damn well know that there can be no pending events, you find out that
something like the mouse driver starts doing syncronous SendMessage calls
that are getting grabbed by a nested ProcessMessages and all hell breaks
loose.

I think that you should investigate removing the reentrancy and seeing if TS
likes this better.

Good luck,
Max.
Regards

Rohit

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PH    (649) 489-2280 
FX    (649) 489-2290
email rohit at cfl.co.nz  or  r.gupta at xtra.co.nz
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Regards

Rohit

======================================================================
CFL - Computer Fanatics Ltd.  21 Barry's Point Road, AKL, New Zealand
PH    (649) 489-2280 
FX    (649) 489-2290
email rohit at cfl.co.nz  or  r.gupta at xtra.co.nz
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