The malloc_stats() function prints (on standard error) statistics about
memory allocated by malloc(3) and related functions. For each arena
(allocation area), this function prints the total amount of memory allocated
and the total number of bytes consumed by in-use allocations. (These two
values correspond to the arena and uordblks fields retrieved by
mallinfo(3).) In addition, the function prints the sum of these two
statistics for all arenas, and the maximum number of blocks and bytes that
were ever simultaneously allocated using mmap(2).
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