请问在linux中如何保存应用程序的core file

Kan · 发表于 2003-4-25 09:07:28

在sun OS下应用程序崩溃后会产生一个core文件，请问在linux下有吗？如果有，要怎么样才能把它保存下来？

wsm · 发表于 2003-4-25 10:42:06

会有啊自动保存在启动目录不过有什么用？？

Kan · 发表于 2003-4-25 10:43:14

做测试时用，可以把core文件让开发人员调试
！

fishcrazy · 发表于 2003-4-25 12:48:38

我每次都把它删掉了，dbxtra对它有用吗

wsm · 发表于 2003-4-25 12:53:42

哇有人看这个内存印象来调试的么？没听说真的有人这么牛的。几百k的大小上哪儿找异常去？调试还不如debug出点语句那？

Kan · 发表于 2003-4-25 13:00:13

我们公司一直这什么搞的，把core attach进去，然后就可以重现当时的状态和定们当时运行的代码行了。

Dragonfly · 发表于 2003-4-25 22:52:06

[quote:930233c533="wsm"]哇有人看这个内存印象来调试的么？没听说真的有人这么牛的。几百k的大小上哪儿找异常去？调试还不如debug出点语句那？[/quote]

debug tools can analyze this.
printf is a good method, but it is not always useful.

moonsky · 发表于 2003-4-27 10:50:11

我们好像也一直都是把core直接删掉的,没有用过这个调试的.
那位有经验,谈谈吧.

Dragonfly · 发表于 2003-4-28 00:00:53

i use it before. but i now only meet oops all the time, never meet it again. Kan, can u write some pieces?

Kan · 发表于 2003-4-28 08:47:09

楼上的兄弟，小弟我不是干编程的，我也不会用。我公司也只是做版本控制和测试的。
不过，中午我吃饭的时候问一下我做开发的同事，然后我可以写一点。

Dragonfly · 发表于 2003-4-28 08:57:28

Core files

In order to analyze a core file the following syntax is used: gdb -c (name of core file) (name of binary which core dumped. Example: gdb -c core gdbtest.

The following is the output of gdb when it loads the core file:

bushmaster:~/gdb/c$ gdb -c core gdbtest
GNU gdb 4.17
Copyright 1998 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i586-slackware-linux"...
Core was generated by `gdbtest'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /lib/libc.so.5...done.
Reading symbols from /lib/ld-linux.so.1...done.
#0  0x80485a1 in B () at gdbtest.c:22
22             *number = NULL;
(gdb)

gdb shows what line of code caused the program to core dump. All the commands shown in the previous section can be used to examine the state of the program when it core dumped.

Forcing a Core Dump

While frequently core dumps happen when least desired, it is possible to force Unix to terminate the process's execution and write it to a core file. To force a foreground process to core dump hold down the control key and press the \ key.

If the process is a background process it can either be brought to the foreground and killed using the procedure mentioned or killed with signal 11 (ie kill -11 processid).

fishcrazy · 发表于 2003-4-28 09:57:54

突然觉得，自己比想象中的更菜...............

Dragonfly · 发表于 2003-4-28 10:05:40

the more u know, u will feel more unknown than ever.
six years ago, i think i know many many thing; three years ago, i think i know many thing; now, i think i know a little. but i know i am growing up.

Kan · 发表于 2003-4-28 10:57:44

刚才问的，如果有需要等会可以问的更详细些！
solaris下面用workshop打开就可以。
linux下面用ddd,debuger等等调试工具先打开对应的可执行文件，然后打开core。

		自动登录	找回密码
密码			注册