A one-line report per block-in-use record is printed. The commands sorts the reports according to the combined size of the blocks. Any leaked blocks since the last showleaks command are also included in the report.
showmemuse [-a] [-m m] [-n number] [-v]
-a shows all the blocks in use (not just the blocks since the last showmemuse command).
-m m combines the blocks-in-use reports. The default value of m is 8 or the global value last given with the check command. If the call stack at the time of allocation for two or more blocks matches m frames, then these blocks are reported in a single combined report. If the -m option is given, it overrides the global value of m.
-n number shows up to number records in the report. The default is 20.
-v generates verbose output. The default is to show non-verbose output.