Merge "Enhance 'stacks' script to handle native processes." into klp-dev

    if [[ $1 =~ ^[0-9]+$ ]] ; then

        local PID="$1"

    elif [ "$1" ] ; then

        local PID=$(pid $1)

        local PIDLIST="$(pid $1)"

        if [[ $PIDLIST =~ ^[0-9]+$ ]] ; then

            local PID="$PIDLIST"

        elif [ "$PIDLIST" ] ; then

            echo "more than one process: $1"

        else

            echo "no such process: $1"

        fi

    else

        echo "usage: stacks [pid|process name]"

    fi

    if [ "$PID" ] ; then

        # Determine whether the process is native

        if adb shell ls -l /proc/$PID/exe | grep -q /system/bin/app_process ; then

            # Dump stacks of Dalvik process

            local TRACES=/data/anr/traces.txt

            local ORIG=/data/anr/traces.orig

            local TMP=/data/anr/traces.tmp

            # Dump stacks and wait for dump to finish

            adb shell kill -3 $PID

        adb shell notify $TRACES

            adb shell notify $TRACES >/dev/null

            # Restore original stacks, and show current output

            adb shell mv $TRACES $TMP

            adb shell mv $ORIG $TRACES

        adb shell cat $TMP | less -S

            adb shell cat $TMP

        else

            # Dump stacks of native process

            adb shell debuggerd -b $PID

        fi

    fi

}