Linux下core文件的使用方法详解

$ ulimit -a
...
-c: core file size (blocks)   0 # 关闭状态
...

ulimit -c unlimited
ulimit -a
...
-c: core file size (blocks)   unlimited
...

$ ulimit -c 1024
$ ulimit -a
...
-c: core file size (blocks)   1024
...

ulimit -c 0
ulimit -a
...
-c: core file size (blocks)   0
...

echo /MyCoreDumpDir/core.%e.%p > /proc/sys/kernel/core_pattern

%p - insert pid into filename # 添加 pid 
%u - insert current uid into filename # 添加当前 uid 
%g - insert current gid into filename # 添加当前 gid 
%s - insert signal that caused the coredump into the filename # 添加导致产生 core 的信号 
%t - insert UNIX time that the coredump occurred into filename # 添加 core 文件生成时的 unix 时间 
%h - insert hostname where the coredump happened into filename # 添加主机名 
%e - insert coredumping executable name into filename # 添加命令名

$ gdb a.out
...
(gdb) core-file core
...
(gdb) bt 
...

$ xxx-xxx-gdb a.out
...
(gdb) solib-search-path xxx.so:xxx.so
...
(gdb) core-file core
...
(gdb) bt
...