core-file debugging with gdb

[Don Howard]

On Mon, 22 Apr 2002, Tung Bui wrote:

> Good day,
> 
> I am using gdb to debug a core file gererated by a propietary target using
> OSE illuminator. 


I'm not familiar with OSE illuminator.  What is your proprietary target?


> 
> Basically, I can read in the core file, get the symbols etc.
> 
> I read the GNU document, but not a lot of mentioning what we can do to debug
> a core-file, such as how to know where the program crashed, how to trace back.


You can invoke gdb with the executable and the core file as arguments:
gdb <executable> <core-file>

Then you can get a stack trace (and find out where your program crashed)  
by using the backtrace command:

(gdb) bt
...

You can select a frame using the frame command:
(gdb) frame <n>

Once a frame is selected, you can examine local variables.


These commands are documented here:
http://sources.redhat.com/gdb/current/onlinedocs/gdb_7.html#SEC41



> 
> I appreciate very much any information you might have.
> 

I hope this helps.  

In the future, please direct questions regarding gdb to
gdb@sources.redhat.com. Many people monitor this list and will be able to
provide answers where I may not.




-- 
dhoward@redhat.com
gdb engineering