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Memory Access Error (malloc and free) (in different OS)

I write my C program in Visual C.
After a malloc, I loop for 100 times and amend the memory contents
which I have malloced (but I have never change the ptr or its
address).
After that I free the memory space.

The problem is that memory access error happens OS-dependently when I
free the memory space.
When I run the exe in DOS-prompt of Win2000 and NT memory access error
happens.
But when I run it in Visual C debug mode and XP, there is no error.

Does anyone have the same experience before when freeing the memory?
Thank you.
Nov 14 '05 #1
1 1793
jo*******@hotmail.com (Joe Joe) wrote:
I write my C program in Visual C.
After a malloc, I loop for 100 times and amend the memory contents
which I have malloced (but I have never change the ptr or its
address).
After that I free the memory space.
Code, please. I'm not aware of any regular with telepathic powers.
The problem is that memory access error happens OS-dependently when I
free the memory space.
When I run the exe in DOS-prompt of Win2000 and NT memory access error
happens.
But when I run it in Visual C debug mode and XP, there is no error.


Sounds like a corrupted allocation arena. Without code, we still can't
be sure.

Richard
Nov 14 '05 #2

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