When you use the memory profiler by calling g_mem_set_vtable (glib_mem_profiler_table), it will collect statistics about how many bytes have been allocated and freed. The only way to access that information is by dumping it on stdout with g_mem_profile (). 

I want programmatic access to that data. It could be as simple as one function g_mem_profiler_amount_allocated () that returns profile_allocs - profile_frees. If such a function existed, it would make writing test code that detects memory leaks much easier.