#!/bin/sh
### Rozhuk Ivan 2020-2022
### coredumper.sh
### 


APP_CORE_IGNORE='conftest jmtpfs'
_CORES_DIR=`sysctl -n kern.corefile | xargs dirname`


# Look for lldb in system.
for __LLDB in '/usr/bin/lldb' /usr/local/bin/lldb1* /usr/local/bin/lldb2* ; do
	if [ -e "${__LLDB}" ]; then
		break;
	fi
done

# Process core files.
for __FILE in `find "${_CORES_DIR}" -name '*.core*' -maxdepth 1 -type f | sort -u`; do
	echo '=========================================================='
	echo -n "Found core: ${__FILE}: "
	date -r "${__FILE}"

	# Skip files from app ignore list.
	# Will return 'python2' for 'python2.7'...
	_CORE_APP_NAME_PART=`basename "${__FILE}" | cut -f1 -d '.'`
	if echo "${APP_CORE_IGNORE}" | grep -q "${_CORE_APP_NAME_PART}" ; then
		echo "SKIP for ${__FILE}"
		rm -f "${__FILE}"
		continue
	fi

	# Upack if required.
	_CORE_FILE_EXT=`basename "${__FILE}" | rev | cut -f1 -d '.' | rev`
	if [ 'gz' == "${_CORE_FILE_EXT}" ]; then
		echo -n "Unpacking..."
		gunzip --force --keep --decompress "${__FILE}"
		echo "done"
		_UNPACKED_FILE=`echo -n "${__FILE}" | sed -e "s|\.${_CORE_FILE_EXT}$||"`
		_CORE_FILE="${_UNPACKED_FILE}"
	else
		_UNPACKED_FILE=''
		_CORE_FILE="${__FILE}"
	fi

	# Extract app file name.
	_CORE_APP_FILE=`procstat -b "${_CORE_FILE}" | tail -1 | xargs | cut -d' ' -f4-`
	if [ -z ${_CORE_APP_FILE} ]; then
		echo "procstat failed, skip core file: ${_CORE_FILE}."
		rm -f "${_UNPACKED_FILE}"
		continue
	fi
	if [ "${_CORE_APP_FILE}" == '-' ]; then
		echo "procstat failed get app file name, fallback to old code."
		_CORE_APP_FILE=`strings ${_CORE_FILE} | grep ^/ | grep ${_CORE_APP_NAME_PART} | tail -1`
	fi
	#_CORE_APP_FILE=`file "${_CORE_FILE}" | sed -e 's|.*, from .||' -e 's| .*$||'`
	echo "App file name: ${_CORE_APP_FILE}"

	# Command line.
	echo -n "Command line: "
	procstat -c "${_CORE_FILE}" | tail -1 | xargs | cut -d' ' -f3-

	# Enviroment.
	echo -n "Env: "
	procstat -e "${_CORE_FILE}" | tail -1 | xargs | cut -d' ' -f3-
	echo

	# Resource usage.
	echo "Resource usage"
	procstat -r "${_CORE_FILE}"
	echo

	# Extract info.
	while true; do
		if [ ! -r "${_CORE_APP_FILE}" ]; then
			echo "App file name: ${_CORE_APP_FILE} - not found."
			break;
		fi
		if [ -e "${__LLDB}" ]; then
			echo "lldb: ${__LLDB}"
			${__LLDB} --no-use-colors --batch --one-line 'bt all' -c "${_CORE_FILE}" "${_CORE_APP_FILE}" 2> /dev/null
			break;
		fi
		if [ -e '/usr/local/bin/gdb' ]; then
			echo "gdb: /usr/local/bin/gdb"
			/usr/local/bin/gdb "${_CORE_APP_FILE}" --batch --core="${_CORE_FILE}" -ex "bt" -ex "thread apply all bt full" 2> /dev/null
			break;
		fi
		rm -f "${_UNPACKED_FILE}"
		echo 'No debugger in system.'
		exit 1
		break;
	done

	rm -f "${_UNPACKED_FILE}"
	# Delete file only if it analyzed.
	if [ -r "${_CORE_APP_FILE}" ]; then
		rm -f "${__FILE}"
	fi
	echo '=========================================================='
done


exit 0