get_stack.sh

#!/usr/bin/env bash
set -eu

# verify running as root
if [[ $(id -u) -ne 0 ]] ; then
    echo "Script must be run as root/sudo" 2>&1
    exit 1
fi

ORIG_CORE=$(cat /proc/sys/kernel/core_pattern)
cp /lib/systemd/system/rippled.service /lib/systemd/system/rippled.service.bak
function cleanup {
    echo "${ORIG_CORE}" | tee /proc/sys/kernel/core_pattern
    mv /lib/systemd/system/rippled.service.bak /lib/systemd/system/rippled.service
    systemctl daemon-reload
}
trap cleanup EXIT

source /etc/os-release

# check package: gdb
EXTRA_PKGS=""
if ! command -v gdb >/dev/null 2>&1 ; then
    EXTRA_PKGS+="gdb"
fi

echo "installing packages..."
if [[ "$ID" == "ubuntu" || "$ID" == "debian" ]] ; then
    eval apt-get -y -qq install rippled-dbgsym ${EXTRA_PKGS}
elif [[ "$ID" == "fedora" || "$ID" == "centos" || "$ID" == "rhel" || "$ID" == "scientific" ]] ; then
    eval yum install -y --enablerepo=ripple-stable rippled-debuginfo ${EXTRA_PKGS}
else
    echo "unsupported distro!"
    exit 1
fi

# setup cores
NEW_COREDIR='/var/log/rippled/cores'
mkdir -p -m 0777 ${NEW_COREDIR}
CORE_BEFORE=$(ls -A1 ${NEW_COREDIR})
echo "/var/log/rippled/cores/%e.%p" | tee /proc/sys/kernel/core_pattern
sed -i '/LimitNOFILE=/a LimitCORE=infinity' /lib/systemd/system/rippled.service
systemctl daemon-reload
echo "**************************************************"
echo " The service file for rippled has been modified.
echo " PLEASE START/RESTART THE rippled SERVICE.
echo "**************************************************"

# poll for corefiles
echo "waiting for corefiles - ctrl-c to interrupt..."
while true; do
    CORE_NOW=$(ls -A1 ${NEW_COREDIR})
    ORIG_IFS="${IFS}"
    IFS=$'\n\r'
    FOUND_CORE=false
    for l in $(diff -w --suppress-common-lines <(echo "${CORE_BEFORE}") <(echo "${CORE_NOW}")) ; do
        if [[ "$l" =~ ^[[:space:]]*\>[[:space:]]*(.+)$ ]] ; then
            COREFILE="${BASH_REMATCH[1]}"
            if [[ "$COREFILE" =~ ^rippled ]] ; then
                FOUND_CORE=true
                echo "FOUND core dump file at '${NEW_COREDIR}/${COREFILE}'"
                GDB_OUTPUT=$(/bin/mktemp /tmp/gdb_output_XXXXXXXXXX.txt)
                gdb \
                    -ex "set height 0" \
                    -ex "set logging file ${GDB_OUTPUT}" \
                    -ex "set logging on" \
                    -ex "print 'ripple::BuildInfo::versionString'" \
                    -ex "thread apply all backtrace full" \
                    -ex "info inferiors" \
                    -ex quit \
                    "/opt/ripple/bin/rippled" \
                    "${NEW_COREDIR}/${COREFILE}" &> /dev/null

                echo -e "CORE INFO: \n\n $(cat ${GDB_OUTPUT}) \n\n)"
                echo "*******************************************************************"
                echo "please save/send file ${GDB_OUTPUT}"
                echo "*******************************************************************"
                chmod a+rw ${GDB_OUTPUT}
                exit 0
            fi
        fi
    done
    IFS="${ORIG_IFS}"
    if [[ ${FOUND_CORE} == true ]]; then
        exit 0
    fi
    sleep 10
done