Usage: vgdb [OPTION]... [[-c] COMMAND]...
vgdb (valgrind gdb) has two usages
  1. standalone to send monitor commands to a Valgrind gdbserver.
     The OPTION(s) must be followed by the command to send
     To send more than one command, separate the commands with -c
  2. relay application between gdb and a Valgrind gdbserver.
     Only OPTION(s) can be given.

 OPTIONS are [--pid=<number>] [--vgdb-prefix=<prefix>]
             [--wait=<number>] [--max-invoke-ms=<number>]
             [--port=<portnr>
             [--cmd-time-out=<number>] [-l] [-T] [-D] [-d]
             [--multi] [--valgrind=<valgrind-exe>] [--vargs ...]

  --pid arg must be given if multiple Valgrind gdbservers are found.
  --vgdb-prefix arg must be given to both Valgrind and vgdb utility
      if you want to change the prefix (default /tmp/vgdb-pipe) for the FIFOs communication
      between the Valgrind gdbserver and vgdb.
  --wait (default 0) tells vgdb to check during the specified number
      of seconds if a Valgrind gdbserver can be found.
  --max-invoke-ms (default 100) gives the nr of milli-seconds after which vgdb
      will force the invocation of the Valgrind gdbserver (if the Valgrind
         process is blocked in a system call).
  --port instructs vgdb to listen for gdb on the specified port nr.
  --cmd-time-out (default 99999999) tells vgdb to exit if the found Valgrind
     gdbserver has not processed a command after number seconds
  --multi start in extended-remote mode, wait for gdb to tell us what to run
   --valgrind, pass the path to valgrind to use. If not specified, the system valgrind will be launched.
   --vargs Additional valgrind tool options (must be used with --multi).
           Everything following --vargs is passed to valgrind as tool options
           (like -q, --leak-check=full, --tool=helgrind, etc.). The program
           executable and its arguments are specified separately by GDB and
           should NOT be included here.
  -l  arg tells to show the list of running Valgrind gdbserver and then exit.
  -T  arg tells to add timestamps to vgdb information messages.
  -D  arg tells to show shared mem status and then exit.
  -d  arg tells to show debug info. Multiple -d args for more debug info

  -h --help shows this message
  The GDB python code defining GDB front end valgrind commands is:
       /usr/libexec/valgrind/valgrind-monitor.py
  To get help from the Valgrind gdbserver, use vgdb help