Why not override the allocator functions and track the memory allocations and deallocations yourself?

You can do pretty much anything at that point (e.g., you can track memory allocations and deallocations at only the specific levels you care about)…

this is such a generic statement... as long as you de-allocate on exit it wont show up as leak, that doesnt mean the app is not continuously allocating more memory, whether as bug or for a valid reason is up to you to find out...

you can try https://gperftools.github.io/gperftools/heapprofile.html setup HEAP_PROFILE_TIME_INTERVAL and look at the reports to see which code lines keep allocating memory...

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