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Debug Error Damage

This word is entirely appropriate in this context. Secondly, my question is directed on guidance on debugging memory errors, I am not too good at tracking memory address. Then, if you write past the end of an allocated block, 'malloc' can detect it, and you get an error message like the one you saw.: how to prevent or fix Join them; it only takes a minute: Sign up What could cause DAMAGE: after normal block error? my review here

You're only giving it 8 bytes in each of the four allocated pointers you are passing. 0 LVL 32 Overall: Level 32 C++ 10 Message Expert Comment by:jhance2000-11-02 Do you Divisibility Proof What Was "A Lot of Money" In 1971? Thanks,     RSS Top 4 posts / 0 new Last post For more complete information about compiler optimizations, see our Optimization Notice. However, it can (theoretically) be caused by a random pointer write (after all, it could write to the guard value).

Debug Error: DAMAGE: After Normal Block (#xxx) at 0xxxxxxxx.... How to make the development and use of Steam Engines preferred over that of Combustion Engines? Join the community of 500,000 technology professionals and ask your questions.

I did have some answer on guidance to debugging memory errors. What you posted seems useless, so its going to cause questions. 0 LVL 32 Overall: Level 32 C++ 10 Message Expert Comment by:jhance2000-11-02 >>EE has rules against innapropriate language. All rights reserved. I would like to believe the error is due to the "getkey" function that is written by external party which I have no control over.

They probably do not want to reveal their source code too. Since this is a 3rd party function you obviously can't step into it but what are you expecting back out of it? When you free the buffer, it checks that this is still valid. Anyway, assuming the problem comes from "bad" parameters that violate an assumption made by the programmer of getkey, shouldn't he have used assertions or exceptions to check the pre-conditions, or at

share|improve this answer answered Apr 27 '09 at 13:06 Naveen 43.9k34116205 add a comment| up vote 0 down vote With the correct options, Visual C++ throws a guard value at the your startup code here...[/white] return 0;}[/color][/code][/code]If it is MFC app then:[code][code=000000][color=21C6FF]#include BOOL CYourApp::InitInstance (){ _CrtSetBreakAlloc (458); [white]//... Powered by vBulletin™Copyright © 2014 vBulletin Solutions, Inc. Thanks a lot in advance.

The most common cause of this error is a buffer overrun. http://forum.videohelp.com/threads/269529-Microsoft-Debug-Error-DAMAGE-after-Normal-block-(-39) He is. I would suggest couple of ways which can help you to detect this scenario: Using tools like Rational Purify: Its good tool to detect memory corruption. Fortran bindings for some of the C debug runtime functions attached.  Due to an unfortunate name clash I can't locate the ones for the operating system routines.  Note that these will

Thanks! 0 · Share on Facebook Comments Eric Tetz Member Posts: 2,141 February 2002 : When I try to run my C++ executable, midway through the program I get a pop-up http://hammerofcode.com/debug-error/debug-error-damage-after-normal-block.php Thanks anyway. 0 Message Author Comment by:oohchild2000-11-04 honestly speaking, I don't exactly know what the function internally does except it calculate a key (parameter1) when we input in any 8 Damage: after normal block Want to Advertise Here? Programming Languages-Other C++ Advertise Here 786 members asked questions and received personalized solutions in the past 7 days.

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Hence I would appreciate if anyone has any pointers on what all I can check in my code. Controlling subfigure captions and subfigure placement A sign showing grouped opening hours of a cafe more hot questions question feed lang-cpp about us tour help blog chat data legal privacy policy Get 1:1 Help Now Advertise Here Enjoyed your answer?

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But only at the end of the program. Sign In · Register Home › C and C++ Howdy, Stranger! When it will stop - call up the "Call Stack" and trace the code back to where your source called 'new()', 'malloc()' or whatever...Thanks for the handy tip! But the DEBUG new would allocate "buffer" bytes at the beginning and end: XXbbbbXX (Where X is an extra byte allocated and b is one you asked for.) If you then

Why are Exp[3] and 2 treated differently within Complex? Thanks for your help. Quick Navigation C++ Programming Top Site Areas Settings Private Messages Subscriptions Who's Online Search Forums Forums Home Forums General Programming Boards C++ Programming C Programming C# Programming Game Programming Networking/Device Communication http://hammerofcode.com/debug-error/debug-error-damage-after-the-normal-block.php Then when delete comes to clean up, if any bytes outside the number requested are modified, you get this warning message.

Help much appreciated. Thread Tools Search this Thread Rate Thread #1 01-Apr-2008, 14:38 phylao New Member Join Date: Mar 2008 Posts: 12 Damage: After Normal Block (#xxx) at 0x0xxxx error Hello, Advanced Search Forum Visual C++ & C++ Programming Visual C++ Programming Debug Error: Damage after normal block If this is your first visit, be sure to check out the FAQ by Join Now For immediate help use Live now!

If it is Win32 API then:[code][code=000000][color=21C6FF]#include int WINAPI WinMain (){ _CrtSetBreakAlloc (458); [white]//... When you use Go to Solution 33 Comments Message Author Comment by:oohchild2000-11-01 To elaborate on the error, here is the piece of problem code. /*********************************** The sample code uses the I am not too sure whether to trust this value. Now you've got a reason to make noise ;-) 0 Message Author Comment by:oohchild2000-11-02 saxaboo, can you elaborate on the "bad parameter" checking with some sample codes.

Then I get the following Debug Error: "DAMAGE: after Normal block (#56) at 0x00304700. What is up with "Debug Error!" from Microsoft Visual C++ Runtime Library? There should be: less to read than allocated.[/blue]: fields[count].name = name;: : fin >> fields[count].position >> fields[count].width;: : //get to the next line: fin.ignore(1024,'');: : }: cout << "got all " If I do release mode I can get rid of the error but I don't want to be corrupting memory.: : I have narrowed it down to the following member function--if

They MUST Have provided you with some sort of documentation, right? 0 Message Author Comment by:oohchild2000-11-04 honestly speaking, I don't exactly know what the function internally does except it calculate What does "$<" mean when used in a g++ argument? My computer keeps getting this error message Microsoft Visual C++Debug Library Program: C\Program Files\Internet Explorer\iexplorer.exe Debug Error DAMAGE: after Normal block (#39) at 0x00DF3E28 any ideas why or how to fix? Note in addition that the debug version of VC has debug heap procedures that allow you to record the file name and line number of the line that allocates a block

We don't know ANYTHING about getkey.