[Crash-utility] How to find core utlility implementation (source code) file in Linux kernel ?

[Jeff Moyer]

VL Chowdary <vlc.chowdary at gmail.com> writes:

> Hi,
> This is VL Chowdary, a software engineer in Bangalore,India.I am currently
> working on a project that deals with "Creation of Postmortem data log file
> on Linux platform".
> The project is on Fedora 12 with Kernel2.6.31.5 version.
>  For that i need following things.
>        1. Find the location of core utility in the kernel.
>        2. Find  the source file that consists of actual implementation of
> the core utility (On Fedora's kernel 2.6.31.5)
>        3. Based on that i want to implement a core file with my own project
> requirements.
>        4. Build the kernel with the above implemented corefile replacing the
> existing one.
>
>                                                      I went through many
> documents and they were saying that core file generated location is in :
>          /proc/sys/kernel.
>                               Is it correct?.
> I couldn't get the source file that contains the implementation of core
> utility.
> Please help in the project for further proceedings.
> Advance thanks to all repliers.

You can record messages using trace points or trace_printk in the
kernel.  Enable whatever trace points you want (or add trace_printks),
then you can examine them in the vmcore using the crash command 'trace'.

Cheers,
Jeff