Linux下生成core dump文件的配置及对core文件的分析
1.环境配置(core 文件生成条件)
1.文件路径配置
kernel.core_pattern = /var/crash/core-%e-%s-%u-%g-%p-%t // 添加到/etc/sysctl.conf
//参数说明
%e is the filename
%g is the gid the process was running under
%p is the pid of the process
%s is the signal that caused the dump
%t is the time the dump occurred
%u is the uid the process was running under
sysctl -p //使配置生效
2.core文件大小配置
ulimit -c unlimited //unlimited 可替换为固定值
1.永久生效方法
可以在~/.bashrc（只对当前用户生效）文件末尾添加ulimit -c unlimited，这样每次打开shell都会生效，可以使用编辑器或者输入命令$ echo 'ulimit -c unlimited' >> ~/.bashrc进行添加。
3.可选配置
程序编译选项添加 -g 选项会生成调试信息
