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How does .NET framework allocate memory for OutOfMemoryException? Ask Question

tag-icon • tag-icon c# .net out-of-memory
How does .NET framework allocate memory for OutOfMemoryException? Ask Question

In C++ it's actually possible to throw an exception by value without allocating memory on a heap, so this situation makes sense. But in .NET framework OutOfMemoryException is a reference type, therefore it is allocated on a heap. How does .NET framework allocates memory for OutOfMemoryException when there is not enough memory to create a new object?

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It is preallocated by the runtime. If you explore the heap of any managed process you'll find an instance of that exception.

Here are the preallocated exceptions of a Hello World app:

0:003> !dumpheap -stat -type Exception
Statistics:
      MT    Count    TotalSize Class Name
735f2920        1           84 System.ExecutionEngineException
735f28dc        1           84 System.StackOverflowException
735f2898        1           84 System.OutOfMemoryException
735f2744        1           84 System.Exception
735f2964        2          168 System.Threading.ThreadAbortException

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