使用GetExceptionCode调试HeapReAlloc故障

Question

Been messing about with this all day and haven't got anywhere so I'm hoping someone can help me - I have a HeapReAlloc method failing with the error ACCESS_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 a quick example of how I can use it to narrow down this failure, please?

Thanks very much, Becky

Answer 1

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> .

Answer 2

Are HeapReAlloc 's hHeap and lpMem valid? What value are you passing for dwFlags ? Did you obtain hHeap via HeapCreate or GetProcessHeap ? What parameters have you provided to HeapCreate / GetProcessHeap ?