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Annotation of src/usr.bin/pmdb/pmdb.1, Revision 1.6

1.6     ! espie       1: .\"    $OpenBSD: pmdb.1,v 1.5 2002/03/15 18:04:41 art Exp $
1.1       art         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
1.6     ! espie      42: at this moment is to specify the name of the program to be debugged and all
1.1       art        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
1.6     ! espie      62: command, it will be catched by
        !            63: .Nm
        !            64: and the process will go into the
1.1       art        65: .Ic STOPPED
                     66: state.
                     67: .It STOPPED
                     68: A stopped process can be examined, changed and restarted with the
                     69: .Ic continue
                     70: command.
                     71: .El
                     72: .Sh COMMANDS
                     73: .Bl -tag -width continue
                     74: .It regs
                     75: Show the contents of the processor registers at the moment the process was
                     76: .Ic STOPPED .
                     77: .It trace
                     78: Show the function call trace of the currently
                     79: .Ic STOPPED
                     80: process.
                     81: .It run
                     82: Start running a
                     83: .Ic LOADED
                     84: process.
                     85: .It continue
                     86: Continue a
                     87: .Ic STOPPED
                     88: process.
                     89: .It kill
                     90: Unconditionally kills the debugged process and puts it in the
                     91: .Ic LOADED
                     92: state.
                     93: .It signal Ar ignore|stop Ar signum|signame
                     94: Sets the signal state for the specified signal to either ignore it and
                     95: pass it to the process or to stop the process.
                     96: .It sigstate
                     97: Shows which signals are currently ignored.
1.3       art        98: .It break Ar symname|addr
                     99: Sets a breakpoint at the symbol
                    100: .Ar symname
                    101: or the numerical address
                    102: .Ar addr .
                    103: .It step
                    104: Resumes execution just like
                    105: .Ic continue ,
                    106: but stops it again as soon as possible after executing at least
                    107: one instruction.
1.5       art       108: .It sym_load Ar fname Ar offs
                    109: Loads a symbol table from the file
                    110: .Ar fname
                    111: at the offset
                    112: .Ar offs .
1.1       art       113: .It help
                    114: Shows a short help.
                    115: .It quit
                    116: Kills the process (if necessary) and exits
                    117: .Nm .
                    118: .It exit
                    119: Alias for
                    120: .Ic quit .
                    121: .El
1.4       art       122: .Sh BUGS
                    123: The command syntax is really poor and ad hoc at this moment. Most of the
                    124: command names and arguments will change as soon as the command line interface
                    125: is replaced.
1.1       art       126: .Sh HISTORY
                    127: The
                    128: .Nm
                    129: debugger was written because the author believed that
                    130: .Xr gdb 1
1.6     ! espie     131: was too bloated and hairy to run on OpenBSD/sparc64.