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tools/iotlab-testbed: add support for remote debugging

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This commit is contained in:
Alexandre Abadie 2021-05-27 14:25:09 +02:00
parent b2a0142c28
commit 565d28a6bc
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GPG Key ID: 1C919A403CAE1405
2 changed files with 83 additions and 5 deletions
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70
dist/testbed-support/iotlab-debug.sh vendored Executable file
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@ -0,0 +1,70 @@
#!/usr/bin/env bash
# This script wraps IoT-LAB remote debugging tools so they can be used with
# debug and debug-server targets.
# @author Alexandre Abadie <alexandre.abadie@inria.fr>
IOTLAB_NODE=$1
IOTLAB_NODE_LIST=$2
IOTLAB_AUTHORITY=$3
IOTLAB_EXP_ID=$4
ELFFILE=$5
SERVER_ONLY=$6
# GDB command, usually a separate command for each platform (e.g. arm-none-eabi-gdb)
: "${GDB:=gdb-multiarch}"
# Debugger client command, can be used to wrap GDB in a front-end
: "${DBG:=${GDB}}"
# Default GDB port
: "${GDB_PORT:=3333}"
# If run from the SSH frontend the remote is the iotlab node hostname. If run
# locally, the GDB server is exposed via an SSH tunnel, so the GDB remote is
# localhost in this case.
if [ ! -z "${IOT_LAB_FRONTEND_FQDN}" ]
then
GDB_REMOTE=${IOTLAB_NODE}
# Use a blocking interactive command to simulate the SSH tunnel
REMOTE_ACCESS_COMMAND="tee &"
else
GDB_REMOTE=localhost
REMOTE_ACCESS_COMMAND="ssh -L 3333:${IOTLAB_NODE}:${GDB_PORT} -N ${IOTLAB_AUTHORITY} &"
fi
# Default debugger flags,
: "${DBG_FLAGS:=-q -ex \"target remote ${GDB_REMOTE}:${GDB_PORT}\"}"
# temporary file that contains the iotlab SSH tunnel pid
IOTLAB_DEBUG_PIDFILE=$(mktemp -t "iotlab_debug_pid.XXXXXXXXXX")
# will be called by trap
cleanup() {
# shellcheck disable=SC2086
iotlab-node --jmespath='keys(@)[0]' --format='lambda ret: exit(int(ret))' --debug-stop ${IOTLAB_EXP_ID} ${IOTLAB_NODE_LIST}
# shellcheck disable=SC2046
kill $(cat "${IOTLAB_DEBUG_PIDFILE}")
rm -f "${IOTLAB_DEBUG_PIDFILE}"
exit 0
}
# cleanup after script terminates
trap 'cleanup ${IOTLAB_DEBUG_PIDFILE}' EXIT
# Start the GDB server on the IoT-LAB node
# shellcheck disable=SC2086
iotlab-node --jmespath='keys(@)[0]' --format='lambda ret: exit(int(ret))' --debug-start ${IOTLAB_EXP_ID} ${IOTLAB_NODE_LIST}
# open SSH tunnel to GDB server running on the IoT-LAB node
sh -c "\
${REMOTE_ACCESS_COMMAND} \
echo \$! > ${IOTLAB_DEBUG_PIDFILE}" &
if [ ! -z "${SERVER_ONLY}" ]
then
# Block until CTRL-C is sent
read -r -d ""
else
# don't trap on Ctrl+C, because GDB keeps running
trap '' INT
# Start the debugger and connect to the GDB server
sh -c "${DBG} ${DBG_FLAGS} ${ELFFILE}"
fi

18
dist/testbed-support/makefile.iotlab.single.inc.mk vendored
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@ -221,8 +221,16 @@ else
endif endif
# Debugger not supported ifneq (,$(filter firefly iotlab-a8-m3 zigduino,$(BOARD)))
DEBUGGER = # Debugger not supported on these boards
DEBUGGER_FLAGS = DEBUGGER =
DEBUGSERVER = DEBUGGER_FLAGS =
DEBUGSERVER_FLAGS = DEBUGSERVER =
DEBUGSERVER_FLAGS =
else
DEBUGGER_COMMON_FLAGS = "$(firstword $(subst ., ,$(IOTLAB_NODE)))" "$(_IOTLAB_NODELIST)" "$(_IOTLAB_AUTHORITY)" "$(_IOTLAB_EXP_ID)"
DEBUGGER = $(RIOTBASE)/dist/testbed-support/iotlab-debug.sh
DEBUGGER_FLAGS = $(DEBUGGER_COMMON_FLAGS) "$(ELFFILE)"
DEBUGSERVER = $(DEBUGGER)
DEBUGSERVER_FLAGS = $(DEBUGGER_COMMON_FLAGS) "" "1"
endif