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Annotation of src/usr.bin/pmdb/pmdb.1, Revision 1.1.1.1

1.1       art         1: .\"    $PMDB: pmdb.1,v 1.2 2002/02/20 15:16:27 art Exp $
                      2: .\"
                      3: .\" Copyright (c) 2002 Artur Grabowski <art@openbsd.org>
                      4: .\" All rights reserved.
                      5: .\"
                      6: .\" Redistribution and use in source and binary forms, with or without
                      7: .\" modification, are permitted provided that the following conditions
                      8: .\" are met:
                      9: .\"
                     10: .\" 1. Redistributions of source code must retain the above copyright
                     11: .\"    notice, this list of conditions and the following disclaimer.
                     12: .\" 2. The name of the author may not be used to endorse or promote products
                     13: .\"    derived from this software without specific prior written permission.
                     14: .\"
                     15: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
                     16: .\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
                     17: .\" AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
                     18: .\" THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
                     19: .\" EXEMPLARY, OR CONSEQUENTIAL  DAMAGES (INCLUDING, BUT NOT LIMITED TO,
                     20: .\" PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
                     21: .\" OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
                     22: .\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
                     23: .\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
                     24: .\" ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     25: .\"
                     26: .Dd Feb 20, 2002
                     27: .Dt PMDB 1
                     28: .Os
                     29: .Sh NAME
                     30: .Nm pmdb
                     31: .Nd debugger.
                     32: .Sh SYNOPSIS
                     33: .Nm pmdb
                     34: .Ar program Op Ar ...
                     35: .Sh DESCRIPTION
                     36: The
                     37: .Nm
                     38: utility can be used to see what is happening inside a running process or
                     39: to catch program crashes and examine the state at the time of the crash.
                     40: The only way to start
                     41: .Nm
                     42: at this moment is to specify the name of the prgram to be debugged and all
                     43: its arguments on the command line.
                     44: The program is controlled from a command line which usually gives the
                     45: prompt "pmdb>".
                     46: .Sh PROCESS STATES
                     47: A loaded program can be in one of three possible states:
                     48: .Bl -tag -width RUNNING
                     49: .It LOADED
                     50: This is the initial state.
                     51: The program is not running, it can't be examined (because it doesn't have
                     52: any state).
                     53: The only thing that can be done to the process is to start it with the
                     54: .Ic run
                     55: command.
                     56: .It RUNNING
                     57: When a process is
                     58: .Ic RUNNING ,
                     59: the only way to affect it is through signals sent to it.
                     60: Unless a signal is ignored with the
                     61: .Ic signal ignore
                     62: command, it will be catched by pmdb and the process will go into the
                     63: .Ic STOPPED
                     64: state.
                     65: .It STOPPED
                     66: A stopped process can be examined, changed and restarted with the
                     67: .Ic continue
                     68: command.
                     69: .El
                     70: .Sh COMMANDS
                     71: .Bl -tag -width continue
                     72: .It regs
                     73: Show the contents of the processor registers at the moment the process was
                     74: .Ic STOPPED .
                     75: .It trace
                     76: Show the function call trace of the currently
                     77: .Ic STOPPED
                     78: process.
                     79: .It run
                     80: Start running a
                     81: .Ic LOADED
                     82: process.
                     83: .It continue
                     84: Continue a
                     85: .Ic STOPPED
                     86: process.
                     87: .It kill
                     88: Unconditionally kills the debugged process and puts it in the
                     89: .Ic LOADED
                     90: state.
                     91: .It signal Ar ignore|stop Ar signum|signame
                     92: Sets the signal state for the specified signal to either ignore it and
                     93: pass it to the process or to stop the process.
                     94: .It sigstate
                     95: Shows which signals are currently ignored.
                     96: .It help
                     97: Shows a short help.
                     98: .It quit
                     99: Kills the process (if necessary) and exits
                    100: .Nm .
                    101: .It exit
                    102: Alias for
                    103: .Ic quit .
                    104: .El
                    105: .Sh HISTORY
                    106: The
                    107: .Nm
                    108: debugger was written because the author believed that
                    109: .Xr gdb 1
                    110: was too to bloated and hairy to run on OpenBSD/sparc64.