为调试进程产生core dump文件
技巧
在用gdb调试程序时,我们有时想让被调试的进程产生core dump文件,记录现在进程的状态,以供以后分析。可以用“generate-core-file”命令来产生core dump文件:
(gdb) help generate-core-file
Save a core file with the current state of the debugged process.
Argument is optional filename. Default filename is 'core.<process_id>'.
(gdb) start
Temporary breakpoint 1 at 0x8050c12: file a.c, line 9.
Starting program: /data1/nan/a
[Thread debugging using libthread_db enabled]
[New Thread 1 (LWP 1)]
[Switching to Thread 1 (LWP 1)]
Temporary breakpoint 1, main () at a.c:9
9 change_var();
(gdb) generate-core-file
Saved corefile core.12955
也可使用“gcore”命令:
(gdb) help gcore
Save a core file with the current state of the debugged process.
Argument is optional filename. Default filename is 'core.<process_id>'.
(gdb) gcore
Saved corefile core.13256
参见gdb手册
贡献者
nanxiao