Re: backtracing

["Yo 'Ric Dude" <ericmit ix netcom com>]

Todd Graham Lewis wrote:
> 
> On Sat, 24 Oct 1998, Paul G Cooper wrote:
> 
> > I'd like to know how to do this - please could you point me you point me
> > to some docs? I promise not to be rude ;-)

[snip  backtrace example]

> This is a little contrived, but the steps are basically the same.  I will
> be adding a section on how to do backtraces to the FAQ later today in the
> "How to Report a Bug" section.

Attached is a script I found on the net, which will generate
the backtrace from a core file.  Simply type "idcore -l".
This might be a useful thing to add to the faq, or gnome itself.

> --
> Todd Graham Lewis            32°49'N,83°36'W          (800) 719-4664, x2804
> ******Linux******         MindSpring Enterprises      tlewis@mindspring.net

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|  __                         a.k.a. Eric B. Mitchell |
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| How's My Programming?   Call:  1 - 800 - DEV - NULL |
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#!/bin/sh
# name:      idcore  --  identify which binary caused a core dump
# author:    c.l.s. (cspiel@physik.tu-muenchen.de)
# last rev.: 1998-01-22  11:14
# bash ver.: 1.14.7(1)
# $Id$
# display help message
# char* disp_help(void)
function disp_help
{
        echo "usage:"
        echo "  idcore [OPTION] [[COREDUMP] ...]"
        echo
        echo "  If COREDUMP is omitted the core file in the current"
        echo "  directory is used."
        echo
        echo "  -h, --help      display this help message"
        echo "  -v, --version   show version of idcore"
        echo "  -b, --brief     brief format, i.e. filename only"
        echo "  -l, --long      long format, with filename, signal,
user,"
        echo "                  date, and backtrace"
}
# retrieve name binary that caused core dump via gdb
# char* get_name(const char* mode, const char* name)
function get_name
{
        case "$1" in
                brief)
                        echo q | gdb --quiet --core="$2" 2>&1 | head -1 | \
                        sed -ne "s/^.*\`\(.*\)'\.$/\1/p"
                        ;;
                standard)
                        echo q | gdb --quiet --core="$2" 2>&1 | head -2
			;;
                long)
                        dump=$(echo -e "where\nq" | \
                                gdb --quiet --core="$2" 2>&1)
                        echo "$dump" | head -2 | sed -ne '2,2s/\.$//p'
                        ls -l "$2" | \
                        awk '{ print "on", $6, $7, $8, "caused by", $3 }'
                        echo
                        echo "backtrace:"
                        echo "$dump" | sed -ne '/^(gdb) /s/^(gdb) //p'
                        ;;
        esac
}
#
# start of main
#
myname=$(basename "$0")         # name of shell-script
mode=standard                   # normal mode of operation
case "$1" in
        -h | --help)
                disp_help
                exit 1
                ;;
        -v | --version)
                echo "version 0.1.0"
                exit 0
                ;;
        -b | --brief)
                mode=brief
                shift
                ;;
        -l | --long)
                mode=long
                shift
                ;;
        -* | --*)
                echo "$myname: unknown option $1"
                exit 2
                ;;
esac
if [ -z "$1" ]; then
        # no argument -> look at core in the current directory
        get_name "$mode" core
else
        # process all arguments
        for c; do
                # echo file we are processing
                if [ "$mode" != "brief" ]; then
                        echo "$c: "
                fi
                get_name "$mode" "$c"
        done
fi
exit 0