分析linux操作系统coredump日志，定位服务异常原因

问题遇到的现象和发生背景

ovs-vswitchd服务异常停止，分析linux操作系统coredump日志，定位服务异常原因

用代码块功能插入代码，请勿粘贴截图

```bash

[root@centos7 ~]# gdb main core.revalidator633.1362.node-33.domain.tld.1667894272 gcc
Excess command line arguments ignored. (gcc)
GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-120.el7
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
http://www.gnu.org/software/gdb/bugs/...
main: No such file or directory.
[New LWP 2962744]
[New LWP 2962745]
[New LWP 2962746]
[New LWP 1368]
[New LWP 74039]
[New LWP 2962714]
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[New LWP 2962720]
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[New LWP 2962742]
Missing separate debuginfo for the main executable file
Try: yum --enablerepo='debug' install /usr/lib/debug/.build-id/d4/f7649031a04106744820008d4e2a881e940fc0
Core was generated by `ovs-vswitchd unix:/var/run/openvswitch/db.sock -vconsole:emer -vsyslog:err -vfi'.
Program terminated with signal 6, Aborted.
#0 0x00007f9e760ea1d7 in ?? ()
(gdb)
(gdb)
(gdb)
(gdb)
(gdb)
(gdb) where
#0 0x00007f9e760ea1d7 in ?? ()
#1 0x00007f9e760eb8c8 in ?? ()
#2 0x0000000000000020 in ?? ()
#3 0x0000000000000000 in ?? ()
(gdb)
#0 0x00007f9e760ea1d7 in ?? ()
#1 0x00007f9e760eb8c8 in ?? ()
#2 0x0000000000000020 in ?? ()
#3 0x0000000000000000 in ?? ()
(gdb) 0

```

不应该先直接去查OVS的具体报错吗。。。
你搞openstack，每个组件服务都有其对应的服务日志文件啊，先去看日志，看看具体报错说啥