Re: Privileged Instruction exception in Release build
From: Stephen Kellett (snail_at_objmedia.demon.co.uk)
Date: 03/19/04
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Date: Fri, 19 Mar 2004 13:45:43 +0000
In message <0BE41E9F-4407-49EB-85BB-7919A9CCA26C@microsoft.com>, Al
<anonymous@discussions.microsoft.com> writes
Well, the program crash was first bought to my attention by my boss after
I gave him a release build to play with on his machine. I had done most of
my testing (for want of a better word) on the debug build where the error
does not occur. And it looks now as if it is a simple access violation rather
than a restricted instruction.
Any ideas?
1) Did you do a full rebuild after changing the size of any structures
or classes? You can change the size by adding/removing data members or
virtual methods, or making an existing method virtual, or making an
existing virtual method non-virtual.
By full rebuild, I also mean full rebuild of the dependent DLLs (if
there are any) that use this class/structure.
2) Possible uninitialised memory problem, leading to data corruption,
leading to the bug
3) Possible bad message map, leading to stack corruption, leading to bug
4) Accessing deleted memory after it has been deleted, thus leading to
data corruption, thus leading to bug.
Memory Validator can help you identify 2, 3, 4.
Take a look at the tutorials, they cover some of these topics. You may
need to switch to debug mode to check some of the errors (such as uninit
var detection).
Stephen
-- Stephen Kellett Object Media Limited http://www.objmedia.demon.co.uk RSI Information: http://www.objmedia.demon.co.uk/rsi.html
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