#!/bin/bash ########################################################################### # Copyright (C) 2017, 2018 IoT.bzh # # Author: Stephane Desneux <sdx@iot.bzh> # Sebastien Douheret <sebastien@iot.bzh> # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. ########################################################################### # This script should be invoked by gdb client through a ssh connection. # It relays gdbmi protocol from gdbserver to gdb client # # WARNING: nothing should be sent to stdout except gdbserver output # FIXME: add support of --debugger option to support tcf or gdb-remote function error() { echo "ERR: $@" >&2 exit 1 } function info() { echo "INF: $@" >&2 } # setup debug dir (shared with service file) DBGDIR=@afm_platform_rundir@/debug mkdir -p $DBGDIR # check application name passed as first arg by gdb APP=$1 [[ -z "$APP" ]] && error "Invalid application name" # redirect to log file exec 2>$DBGDIR/$APP.dbgclt.log # activate DEBUG in environment file sourced in systemd service AFB_WAIT_POINT="start-start" echo "AFB_DEBUG_WAIT=$AFB_WAIT_POINT" >$DBGDIR/$APP.env # remove debug env file on exit trap "rm $DBGDIR/$APP.*" STOP INT QUIT EXIT # ask appfw to start application pid=$(afm-util start $APP) [[ -z "$pid" || ! -e "/proc/$pid" ]] && error "Failed to start application $APP" info "$APP started with pid=$pid" # wait debugging process is stop/waiting at start-start point AFB_FILE=/tmp/afb-debug-$pid tmo=100 info "Waiting for process stopped..." while [[ ! -e "$AFB_FILE" ]]; do sleep 0.1 tmo=$(expr $tmo - 1) [[ "$tmo" == "0" ]] && error "Timeout waiting for process $pid stopped" done info "Waiting for process stopped..." AFB_WAIT_FILE=/tmp/afb-debug-$pid tmo=100 res=1 while [[ "$res" != "0" ]]; do sleep 0.1 tmo=$(expr $tmo - 1) [[ "$tmo" == "0" ]] && error "Timeout waiting for process $pid stopped" grep $AFB_WAIT_POINT $AFB_WAIT_FILE > /dev/null 2>&1 res=$? done # debugging info "Attaching gdbserver to pid $pid ..." gdbserver --attach - $pid # end of debug session info "proxy connection terminated - killing $APP (pid $pid)" afm-util kill $pid >&2 info "$APP killed"