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How do I prevent and/or handle a StackOverflowException?

Asked 2008-10-15T22:47:23.807
71

I would like to either prevent or handle a StackOverflowException that I am getting from a call to the XslCompiledTransform.Transform method within an Xsl Editor I am writing. The problem seems to be that the user can write an Xsl script that is infinitely recursive, and it just blows up on the call to the Transform method. (That is, the problem is not just the typical programmatic error, which is usually the cause of such an exception.)

Is there a way to detect and/or limit how many recursions are allowed? Or any other ideas to keep this code from just blowing up on me?

c# .net stack-overflow xslcompiledtransform
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2 Answers

1

I had a stackoverflow today and i read some of your posts and decided to help out the Garbage Collecter.

I used to have a near infinite loop like this:

    class Foo
    {
        public Foo()
        {
            Go();
        }

        public void Go()
        {
            for (float i = float.MinValue; i < float.MaxValue; i+= 0.000000000000001f)
            {
                byte[] b = new byte[1]; // Causes stackoverflow
            }
        }
    }

Instead let the resource run out of scope like this:

class Foo
{
    public Foo()
    {
        GoHelper();
    }

    public void GoHelper()
    {
        for (float i = float.MinValue; i < float.MaxValue; i+= 0.000000000000001f)
        {
            Go();
        }
    }

    public void Go()
    {
        byte[] b = new byte[1]; // Will get cleaned by GC
    }   // right now
}

It worked for me, hope it helps someone.

answered 2013-07-09T16:22:20.217
-2

You can read up this property every few calls, Environment.StackTrace , and if the stacktrace exceded a specific threshold that you preset, you can return the function.

You should also try to replace some recursive functions with loops.

answered 2012-12-27T18:18:10.683

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