Debugging HeapReAlloc() failure using GetExceptionCode()

I have a HeapReAlloc() failing with the error A开发者_高级运维CCESS_VIOLATION, but I'm unsure how to implement a further check using GetExceptionCode() as it uses try/catch or exception or something - can someone give me an example of how I can use it to narrow down this failure?

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You are trouble-shooting the wrong problem. HeapRealloc() is bombing because the heap is corrupted. That happened a while ago, some statement in your program overflowing a heap block, writing data to memory that was freed, something like that. MSVC has a debug memory allocator to help you troubleshoot these kind of problems, look in the MSDN library for <crtdbg.h>.

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Make sure hHeap and lpMem parameters of HeapReAlloc are valid. You should take the following possible root of causes into account.

• What value is passes for dwFlags.
• How hHeap is obtained.
  • via HeapCreate
  • or GetProcessHeap
• What parameters are provided to HeapCreate/GetProcessHeap.

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In addition to HeapValidate(hHeap, 0, lpMem), you should also validate the entire heap by calling

HeapValidate(hHeap, 0, NULL)