如何轻松打包分析核心转储所需的库(即packcore) [英] How do I easily package libraries needed to analyze a core dump (i.e. packcore)

问题描述

HPUX 上可用的 GDB 版本有一个名为packcore"的命令，它创建一个包含核心转储、可执行文件和所有库的 tarball.我发现这在尝试在另一台机器上调试核心转储时非常有用.

The version of GDB that is available on HPUX has a command called "packcore", which creates a tarball containing the core dump, the executable and all libraries. I've found this extremely useful when trying to debug core dumps on a different machine.

在我可能在 Linux 机器上找到的标准版 GDB 中是否有类似的命令?

Is there a similar command in the standard version of GDB that I might find on a Linux machine?

我正在寻找一个简单的命令，当生产机器上出现问题时，不一定是开发人员的人可以运行该命令.

I'm looking for an easy command that someone that isn't necessarily a developer can run when things go bad on a production machine.

推荐答案

这是一个执行必要步骤的脚本(仅在 RHEL5 上测试过，但也可能在其他地方工作):

Here's a script that does the necessary steps (tested only on RHEL5, but might work elsewhere too):

#!/bin/sh
#
# Take a core dump and create a tarball of all of the binaries and libraries
# that are needed to debug it.
#

include_core=1
keep_workdir=0

usage()
{
        argv0="$1"
        retval="$2"
        errmsg="$3"
        if [ ! -z "$errmsg" ] ; then
                echo "ERROR: $errmsg" 1>&2
        fi
        cat <<EOF
Usage: $argv0 [-k] [-x] <corefile>
        Parse a core dump and create a tarball with all binaries and libraries
        needed to be able to debug the core dump.
        Creates <corefile>.tgz

        -k - Keep temporary working directory
        -x - Exclude the core dump from the generated tarball
EOF
        exit $retval
}

while [ $# -gt 0 ] ; do
        case "$1" in
        -k)
                keep_workdir=1
                ;;
        -x)
                include_core=0
                ;;
        -h|--help)
                usage "$0" 0
                ;;
        -*)
                usage "$0" 1 "Unknown command line arguments: $*"
                ;;
        *)
                break
                ;;
        esac
        shift
done

COREFILE="$1"

if [ ! -e "$COREFILE" ] ; then
        usage "$0" 1 "core dump '$COREFILE' doesn't exist."
fi
case "$(file "$COREFILE")" in
        *"core file"*)
                break
                ;;
        *)
                usage "$0" 1 "per the 'file' command, core dump '$COREFILE' is not a core dump."
                ;;
esac

cmdname=$(file "$COREFILE" | sed -e"s/.*from '(.*)'/1/")
echo "Command name from core file: $cmdname"
fullpath=$(which "$cmdname")
if [ ! -x "$fullpath" ] ; then
        usage "$0" 1 "unable to find command '$cmdname'"
fi
echo "Full path to executable: $fullpath"

mkdir "${COREFILE}.pack"
gdb --eval-command="quit" "${fullpath}" ${COREFILE}  2>&1 | 
  grep "Reading symbols" | 
  sed -e's/Reading symbols from //' -e's/....*//' | 
  tar --files-from=- -cf - | (cd "${COREFILE}.pack" && tar xf -)
if [ $include_core -eq 1 ] ; then
        cp "${COREFILE}" "${COREFILE}.pack"
fi
tar czf "${COREFILE}.pack.tgz" "${COREFILE}.pack"

if [ $keep_workdir -eq 0 ] ; then
        rm -r "${COREFILE}.pack"
fi

echo "Done, created ${COREFILE}.path.tgz"

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