vgdb(1) on Linux
The text 64db76dd38f7, as Debian 8 (Jessie) shipped it.
intermediary between Valgrind and GDB or a shell
Flags it lists
-
--cmd-time-out -
--max-invoke-ms -
--pid -
--port -
--vgdb-prefix -
--wait -
-D -
-c -
-d -
-l