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#!/bin/bash
# sample unresolved backtrace lines picked up from a brick log that should go
# into a backtrace file eg. bt-file.txt:
# /usr/lib64/glusterfs/3.8.4/xlator/cluster/replicate.so(+0x3ec81)[0x7fe4bc271c81]
# /usr/lib64/glusterfs/3.8.4/xlator/cluster/replicate.so(+0x3eecd)[0x7fe4bc271ecd]
# /usr/lib64/glusterfs/3.8.4/xlator/cluster/replicate.so(+0x404cb)[0x7fe4bc2734cb]
# /usr/lib64/glusterfs/3.8.4/xlator/cluster/replicate.so(+0x3d2b6)[0x7fe4bc2702b6]
# /usr/lib64/glusterfs/3.8.4/xlator/cluster/replicate.so(+0x3d323)[0x7fe4bc270323]
#
# following is the output of the script for the above backtrace lines:
# /usr/lib64/glusterfs/3.8.4/xlator/cluster/replicate.so(+0x3ec81)[0x7fe4bc271c81] __afr_selfheal_data_finalize_source inlined at /usr/src/debug/glusterfs-3.8.4/xlators/cluster/afr/src/afr-self-heal-data.c:684 in __afr_selfheal_data_prepare /usr/src/debug/glusterfs-3.8.4/xlators/cluster/afr/src/afr-self-heal-data.c:603
# /usr/lib64/glusterfs/3.8.4/xlator/cluster/replicate.so(+0x3eecd)[0x7fe4bc271ecd] __afr_selfheal_data /usr/src/debug/glusterfs-3.8.4/xlators/cluster/afr/src/afr-self-heal-data.c:740
# /usr/lib64/glusterfs/3.8.4/xlator/cluster/replicate.so(+0x404cb)[0x7fe4bc2734cb] afr_selfheal_data /usr/src/debug/glusterfs-3.8.4/xlators/cluster/afr/src/afr-self-heal-data.c:883
# /usr/lib64/glusterfs/3.8.4/xlator/cluster/replicate.so(+0x3d2b6)[0x7fe4bc2702b6] afr_selfheal_do /usr/src/debug/glusterfs-3.8.4/xlators/cluster/afr/src/afr-self-heal-common.c:1968
# /usr/lib64/glusterfs/3.8.4/xlator/cluster/replicate.so(+0x3d323)[0x7fe4bc270323] afr_selfheal /usr/src/debug/glusterfs-3.8.4/xlators/cluster/afr/src/afr-self-heal-common.c:2015
#
# Usage with debuginfo RPM:
# print-backtrace.sh $HOME/Downloads/glusterfs-debuginfo-3.8.4-10.el7.x86_64.rpm bt-file.txt
#
# Usage with source install:
# print-packtrace.sh none bt-file.txt
function Usage()
{
echo -e "Usage:\n\t$0 { none | <debuginfo-rpm> } <backtrace-file>"
echo "none: implies we don't have a debuginfo rpm but want to resolve"
echo " against a source install which already has the debuginfo"
echo " NOTE: in this case you should have configured the build"
echo " with --enable-debug and the linker options should"
echo " have the option -rdynamic"
}
debuginfo_rpm=$1
backtrace_file=$2
if [ ! $debuginfo_rpm ] || [ ! $backtrace_file ]; then
Usage
exit 1
fi
if [ $debuginfo_rpm != "none" ] && [ ! -f $debuginfo_rpm ]; then
echo "no such rpm file: $debuginfo_rpm"
exit 1
fi
if [ ! -f $backtrace_file ]; then
echo "no such backtrace file: $backtrace_file"
exit 1
fi
if ! file $debuginfo_rpm | grep RPM >/dev/null 2>&1 ; then
echo "file does not look like an rpm: $debuginfo_rpm"
exit 1
fi
rpm_name=""
debuginfo_path=""
debuginfo_extension=""
if [ $debuginfo_rpm != "none" ]; then
# extract the gluster debuginfo rpm to resolve the symbols against
rpm_name=$(basename $debuginfo_rpm '.rpm')
if [ -d $rpm_name ]; then
echo "directory already exists: $rpm_name"
echo "please remove/move it and reattempt"
exit 1
fi
mkdir -p $rpm_name
rpm2cpio $debuginfo_rpm | cpio --quiet --extract --make-directories --preserve-modification-time --directory=$rpm_name
debuginfo_path="$PWD/$rpm_name/usr/lib/debug"
debuginfo_extension=".debug"
else
debuginfo_path=""
debuginfo_extension=""
fi
# NOTE: backtrace file should contain only the lines which need to be resolved
for bt in $(grep glusterfs $backtrace_file)
do
libname=$(echo $bt | cut -f 1 -d '(')
addr=$(echo $bt | cut -f 2 -d '(' | cut -f 1 -d ')')
# only unresolved addresses start with a '+'
if echo $addr | egrep '^\+' >/dev/null 2>&1 ; then
newbt=( $(eu-addr2line --functions --exe=${debuginfo_path}${libname}${debuginfo_extension} $addr) )
echo "$bt ${newbt[*]}"
fi
done
# remove the temporary directory
if [ -d $rpm_name ]; then
rm -rf $rpm_name
fi
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