The -memuse option turns on memory use (memuse) checking. Using check -memuse implies using check -leaks. In addition to a leak report at program exit, you also get a report listing blocks in use, biu. By default, a non-verbose report on blocks in use is generated. This default is controlled by the dbxenv rtc_biu_at_exit. At any time during program execution, you can see where the memory in your program has been allocated.
The -frames n and -match m variables function as described in the following section.