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Heap corruption under Win32; how to locate?

By : user41073
Date : July 26 2020, 01:00 PM
With these it helps My first choice would be a dedicated heap tool such as pageheap.exe.
Rewriting new and delete might be useful, but that doesn't catch the allocs committed by lower-level code. If this is what you want, better to Detour the low-level alloc APIs using Microsoft Detours.
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C++ Heap Corruption: Local heap variable causing issues

By : Prativas Basu
Date : March 29 2020, 07:55 AM
I wish this help you The code you've given looks OK - with one caveat: the initial value of counter is not in the code itself. So either you don't start at counter = 0, or some other piece of code is stomping on your indices buffer.
That's the beauty of heap corruptions. There is no guarantee that the bug is in the removed portion on the code. It may simply hide the bug that exists somewhere else in your code.

Heap corruption - "Free Heap block 61af0f0 modified at 61af194 after it was freed" C++

By : khan
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further
So from what I know, the error I'm getting is caused by accessing (deleting again) block of memory which was already freed.

GFlags setting to catch heap corruption (other than Page Heap)?

By : TheColonel73
Date : March 29 2020, 07:55 AM
hop of those help? IMHO the easiest way to control all this checking is using the ApplicationVerifier. You have a perfect UI and you can play around with all flags. Heap Free checking is a good flag without too much overhead. So if a heap block is badly modified and the block is freed you get a break into the debugger. If the corruption occurs near the allocation and freeing of the block, this might help. AFAIK "Heap parameter chechking" is just a lightweight "heap validation on call". I never had any success with this. Heap tail checking and tagging is easy and fast. Works sometimes for me.
You know that you can control this on a per application base also with gflags.

HEAP CORRUPTION DETECTED: after normal block... CRT detected that the application worte to memory after end of heap buff

By : FrankDu
Date : March 29 2020, 07:55 AM
will help you buffer[valread] = '\0'; is attempting to access an element of buffer that doesn't exist. The program behaviour is therefore undefined.
If you had used data.at(valread) instead then a std::exception would have been thrown (and intercepted at your catch site), as required by the C++11 standard.

NEW/Delete Heap Corruption Detected : CRT detected that the application wrote to memory after end of heap buffer

By : user5062104
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , In the following snippet, I am trying to de-allocate the dynamic memory used to create the a Set using New but after erasing the nodes of SET, if I try to delete. , First let me quote a programmer I learned a lot from:
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