#!/bin/sh
#
# bt2line : script to convert memory addresses to source code's line numbers
#           in the backtrace output using addr2line.
#

ADDR2LINE=${ADDR2LINE:-addr2line}
TR=${TR:-tr}
SED=${SED:-sed}

test "$#" -eq 0 && $0 -help

replace_lineaddr=yes
for arg in "$@" ; do
    case $arg in
    -h|-help|--h|--help)
        pgmname="`basename $0`"
cat <<_EOF
$pgmname : Convert the memory addresses to line numbers in the backtrace output.
          The backtrace output is read from the stdin.
Usage: $pgmname [options] executable_name
       e.g. $pgmname foo.exe < foo.txt
            cat foo.txt | tr -d '\0' | $pgmname foo.exe
Options:
    -h|-help|--h|--help : Display this help message.
    -n                  : Show the memory addresses.
_EOF
        exit 1
    ;;
    -n)
        replace_lineaddr=no
    ;;
    *)
        executable="$arg"
        if [ ! -x "$executable" ] ; then
            echo "$executable is either non-existent or not an executable file."
            exit 1
        fi
    ;;
    esac
done

# Since blank is in $IFS, set IFS to nothing so leading space can be preserved.
save_IFS="$IFS"
IFS=''
${TR} -d '\0' | while read line ; do
    lineaddr="`echo $line | ${SED} -n 's|.*\[\(0x[0-9a-f]\+\)\]$|\1|p'`"
    if [ -n "$lineaddr" ] ; then
        lineloc="`$ADDR2LINE -e $executable $lineaddr`"
        if [ "$replace_lineaddr" = "yes" ] ; then
#           echo "$line" | sed -n "s|\(.*\)\[0x[0-9a-f]\+\]$|\1\[${lineloc}\]|p"
            echo "$line" | ${SED} -e "s|\[0x[0-9a-f]\+\]$|\[${lineloc}\]|g"
        else
            echo "$line $lineloc"
        fi
    else
        echo "$line"
    fi
done
IFS="$saved_IFS"