# -*- shell-script -*- # handle.sh - gdb-like "handle" debugger command # # Copyright (C) 2002-2006, 2008, 2010, 2016 Rocky Bernstein # # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License as # published by the Free Software Foundation; either version 2, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; see the file COPYING. If not, write to # the Free Software Foundation, 59 Temple Place, Suite 330, Boston, # MA 02111 USA. # Process debugger "handle" command. _Dbg_help_add handle \ "**handle** *signal* *action* Specify how to handle *signal*. *signal* is a signal name like SIGSEGV, but numeric signals like 11 (which is usually equivalent on \*nix systems) is okay too. *action* is one of \"stop\", \"nostop\", \"print\", and \"noprint\". \"Stop\" indicates entering debugger if this signal happens. \"Print\" indicates printing a message if this signal is encountered. \"Stack\" is like \"print\" but except the entire call stack is printed. Prefacing these actions with \"no\" indicates not to do the indicated action." proc _Dbg_do_handle { typeset sig=$1 typeset cmd=$2 typeset -i signum if [[ -z $sig ]] { _Dbg_errmsg "Missing signal name or signal number." return 1 } if [[ $sig == $int_pat ]] { setglobal signame = $[_Dbg_signum2name $sig] if sh-expr ' $? != 0 )' { _Dbg_errmsg "Bad signal number: $sig" return 2 } setglobal signum = 'sig' } else { typeset signum; setglobal signum = $[_Dbg_name2signum $sig] if sh-expr ' $? != 0 )' { _Dbg_errmsg "Bad signal name: $sig" return 3 } } match $cmd { with nop | nopr | nopri | noprin | noprint compat array-assign _Dbg_sig_print 'signum' ''noprint'' # noprint implies nostop compat array-assign _Dbg_sig_stop 'signum' ''stop'' with nosta | nostac | nostack compat array-assign _Dbg_sig_show_stack 'signum' ''nostack'' with nosto | nostop compat array-assign _Dbg_sig_stop 'signum' ''nostop'' with p | pr | pri | prin | print compat array-assign _Dbg_sig_print 'signum' ''print'' with sta | stac | stack compat array-assign _Dbg_sig_show_stack 'signum' ''showstack'' with sto | stop compat array-assign _Dbg_sig_stop 'signum' ''stop'' # stop keyword implies print compat array-assign _Dbg_sig_print 'signum' ''print'' with * if sh-expr ' !cmd )' { _Dbg_errmsg \ "Need to give a command: stop, nostop, stack, nostack, print, noprint" return 4 } else { _Dbg_errmsg "Invalid handler command $cmd" return 5 } } return 0 }