CODEWITHSUNDEEP
malloc
Fatema Merchant
Fatema Merchant

Reputation: 25

Memory allocation

I have a base class and a derived class. Things work well with this setup. I have added another class in base class, so its a nested class. On allocation of memory for the new nested class, I see some memory corruption. I want to know when we have nested class, does the size of base class increase ?

Upvotes: 0

Views: 220

Answers (1)

Alex North-Keys
Alex North-Keys

Reputation: 4363

Odds are the changes are hiding an application code problem, just as certain memory bugs don't corrupt a running process the same way when run under a debugger, which also changes the environment.

mallopt is used to frob the value however, with this doc:

MALLOC_ARENA_SIZE
    The size of the arena, a chunk of memory that the memory allocator allocates
    and deallocates from the system. This value must be a multiple of 4 KB, and
    currently is limited to being less than 256 KB. Environment variable:
    MALLOC_ARENA_SIZE.

But like I said, if changes this looks like it fixes the corruption, don't believe it. Better to set the arena size to whatever value exposes the application bug, then fix the bug itself.

Upvotes: 1

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