Unhandled Exception : Access Violation

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While debugging im getting "Unhandled Exception : Access Violation" How to solve it please help me

Thank you
AJ

Posted 15-Mar-11 20:20pm

AmarJothi

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Sergey Alexandrovich Kryukov 16-Mar-11 2:42am

Who ask Questions like that? No information from you. How can you imagine the Answer?! Very bad.
Not to worry, read my instructions and proceed.
Next time, learn to report a problem properly.
--SA

fjdiewornncalwe 17-Mar-11 19:09pm

He's getting an access violation because he probably isn't providing his code enough information either.

Sergey Alexandrovich Kryukov 17-Mar-11 22:14pm

Very educated guess,
-SA

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Sergey Alexandrovich Kryukov · Accepted Answer · 2011-03-15T20:40:00

First of all, did you use debugger? It will pin-point the problem in almost all cases. Still have problems?

Handle all exceptions, at least on top of the stack of each thread. That will give you enough information to address the problem. If you still cannot solve it, dump exception information, stack, find out code lines where it happens, post relevant part of code (comment the lines where exception is thrown) and exception dump.

Don't block any exceptions from propagation up the stack, otherwise you will have huge troubles finding the ends. There are some rare exclusions from this rule when you really need to handle exceptions and block its propagation, usually as a work-around of some 3rd-party code inaccessible for your patch.

You can only block exception propagation on the very top of each thread and in the main UI cycle, always logging exception information (and presenting it in UI if it is in the UI thread). This is done to avoid termination of the application. You should have the exception dump in all cases.

If you cannot locate and fix the problem after you get this information, post it and ask follow-up Questions.

—SA

Espen Harlinn · Accepted Answer · 2011-03-16T10:24:00

You may want to use the following references to add some debugging functionality to your program:
Exception Handling in Visual C++[^]

_set_se_translator[^] - allows you to convert an access violation into a C++ exception - it's usually a good idea to preallocate a buffer for exception information on a per thread basis to avoid calling the runtime libraries during this conversion.

Possibly calling DebugBreak[^] as appropriate.

This usually facilitates more efficient debugging - especially if there is a lot of concurrent activity in your program.

Best regards
Espen Harlinn

Unhandled Exception : Access Violation

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