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|
# -*- shell-script -*-
# where.sh - gdb-like "where" debugger command
#
# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2008 Rocky Bernstein
# rocky@gnu.org
#
# bashdb 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.
#
# bashdb 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 bashdb; see the file COPYING. If not, write to the Free Software
# Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA.
# Print a stack backtrace.
# $1 is an additional offset correction - this routine is called from two
# different places and one routine has one more additional call on top.
# $2 is the maximum number of entries to include.
# $3 is which entry we start from; the "up", "down" and the "frame"
# commands may shift this.
# This code assumes the version of bash where FUNCNAME is an array,
# not a variable.
_Dbg_help_add where \
"where [N] -- Print a backtrace of calling functions and sourced files.
The backtrace contains function names, arguments, line numbers, and
files. If N is given, list only N calls."
_Dbg_do_backtrace() {
_Dbg_not_running && return 1
typeset -i n=${#FUNCNAME[@]}-1 # remove us (_Dbg_do_info_args) from count
eval "$_seteglob"
if [[ $1 != $int_pat ]] ; then
_Dbg_errmsg "Bad integer parameter: $1"
eval "$_resteglob"
return 1
fi
if [[ $2 != '' && $2 != $int_pat ]] ; then
_Dbg_errmsg "Bad integer parameter: $2"
eval "$_resteglob"
return 1
fi
eval "$_resteglob"
typeset prefix='##'
typeset -i count=${2:-$n}
typeset -i k=${3:-0}
typeset -i i=_Dbg_STACK_TOP+k+$1
typeset -i j=i
(( j > n )) && return 1
(( i == _Dbg_stack_pos+$1 )) && prefix='->'
if (( k == 0 )) ; then
typeset filename=${BASH_SOURCE[$i]}
(( _Dbg_basename_only )) && filename=${filename##*/}
_Dbg_print_frame "$prefix" "$k" '' "$filename" "$_curline" ''
((count--)) ; ((k++))
fi
# Figure out which index in BASH_ARGV is position "i" (the place where
# we start our stack trace from). variable "r" will be that place.
typeset -i q
typeset -i r=0
for (( q=0 ; q<i ; q++ )) ; do
[[ -z ${BASH_ARGC[$q]} ]] && break
(( r = r + ${BASH_ARGC[$q]} ))
done
# Loop which dumps out stack trace.
for (( ; (( i <= n && count > 0 )) ; i++ )) ; do
typeset -i arg_count=${BASH_ARGC[$i]}
((j++)) ; ((count--))
prefix='##'
(( i == _Dbg_stack_pos+$1-1)) && prefix='->'
if (( i == n )) ; then
# main()'s file is the same as the first caller
j=i
fi
_Dbg_msg_nocr "$prefix$k ${FUNCNAME[$i]}("
typeset parms=''
# Print out parameter list.
if (( 0 != ${#BASH_ARGC[@]} )) ; then
typeset -i s
for (( s=0; s < arg_count; s++ )) ; do
if (( s != 0 )) ; then
parms="\"${BASH_ARGV[$r]}\", $parms"
elif [[ ${FUNCNAME[$i]} == "source" ]] \
&& (( _Dbg_basename_only )); then
typeset filename=${BASH_ARGV[$r]}
filename=${filename##*/}
parms="\"$filename\""
else
parms="\"${BASH_ARGV[$r]}\""
fi
((r++))
done
fi
typeset filename=${BASH_SOURCE[$j]}
(( _Dbg_basename_only )) && filename=${filename##*/}
_Dbg_msg "$parms) called from file \`$filename'" \
"at line ${BASH_LINENO[$i]}"
((k++))
done
return 0
}
_Dbg_alias_add 'T' 'where'
_Dbg_alias_add 'backtrace' 'where'
_Dbg_alias_add 'bt' 'where'
|
