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POTechniques for finding/avoiding unmanaged leaks in managed code
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2010-01-07T22:28:10.047
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What are the best ways for a .NET developer to hunt down (and avoid) unmanaged leaks in a managed app? There seem to be many excellent resources for tracking down managed leaks, but I haven't found much on tracking unmanaged leaks in a managed app. <a href="https://stackoverflow.com/questions/45627/how-do-you-detect-avoid-memory-leaks-in-your-unmanaged-code">This question</a> is related, but asks the question from a purely unmanaged point of view, so many of the answers assume that you have access to unmanaged code, and none mention any .NET-specific pitfalls or techniques. Here are some (very basic) things I have tried: <ul> <li><a href="http://www.microsoft.com/downloads/details.aspx?FamilyID=28BD5941-C458-46F1-B24D-F60151D875A3&displaylang=en" rel="nofollow noreferrer">DebugDiag</a>. It looks very promising, and it may work for you, but it happens to crash my particular app.</li> <li><a href="http://www-01.ibm.com/software/awdtools/purifyplus/" rel="nofollow noreferrer">Rational PurifyPlus</a>. Sadly, also crashes my app.</li> <li><a href="http://www.automatedqa.com/products/aqtime/" rel="nofollow noreferrer">AQTime</a> (at the recommendation of @Reed and @Caelum). This program looks fabulous, but, like the poster of the question @Caelum mentioned, AQTime also crashes my app.</li> <li>Temporarily remove code that creates objects that I know use unmanaged memory.</li> <li>Ensure that the app is disposing all objects that implement <code>IDisposable</code></li> </ul> I should mention that I was able to successfully profile another managed app (which was leaking unmanaged memory) using the profilers above. Please give them a try if you've got an unmanaged leak.
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<.net><memory-leaks>
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Techniques for finding/avoiding unmanaged leaks in managed code
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