Merge "Utility to dump stacks from arbitrary processes."

# to the usual ANR traces file

function systemstack()

{

    adb shell echo '""' '>>' /data/anr/traces.txt && adb shell chmod 776 /data/anr/traces.txt && adb shell kill -3 $(pid system_server)

    stacks system_server

}

function stacks()

{

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

        local PID="$1"

    elif [ "$1" ] ; then

        local PID=$(pid $1)

    else

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

    fi

    if [ "$PID" ] ; then

        local TRACES=/data/anr/traces.txt

        local ORIG=/data/anr/traces.orig

        local TMP=/data/anr/traces.tmp

        # Keep original traces to avoid clobbering

        adb shell mv $TRACES $ORIG

        # Make sure we have a usable file

        adb shell touch $TRACES

        adb shell chmod 666 $TRACES

        # Dump stacks and wait for dump to finish

        adb shell kill -3 $PID

        adb shell notify $TRACES

        # Restore original stacks, and show current output

        adb shell mv $TRACES $TMP

        adb shell mv $ORIG $TRACES

        adb shell cat $TMP | less -S

    fi

}

function gdbclient()