Re: KGTP (Linux Kernel debugger and tracer) 20111218 release

[Geunsik Lim <leemgs1@gmail.com>]

On Sun, Dec 18, 2011 at 9:11 PM, Hui Zhu <teawater@gmail.com> wrote:
> KGTP is a realtime and lightweight Linux Kernel debugger and tracer.
>
> It makes Linux Kernel supply a GDB remote debug interface. Then GDB in
> current machine or remote machine (see
> https://code.google.com/p/kgtp/wiki/HOWTO#Make_GDB_connect_to_gtp) can
> debug and trace Linux through GDB tracepoint without stopping the
> Linux Kernel.
> And even if the board doesn't have GDB on it and doesn't have
> interface for remote debug. It can debug the Linux Kernel using
> offline debug (See
> https://code.google.com/p/kgtp/wiki/HOWTO#Offline_debug).
> And it can work with Android (See
> https://code.google.com/p/kgtp/wiki/HowToUseKGTPinAndroid).
> Now, it supports X86-32, X86-64, MIPS and ARM.
>
> Now, KGTP 20111218 release.
> You can get the package for it from
> http://kgtp.googlecode.com/files/kgtp_20111218.tar.bz2
> or
> svn co https://kgtp.googlecode.com/svn/tags/20111218
>
> The change of this release is:
> Add gtp_rb to be the new frame buffer to make trace record speed up
> and more friendly to the older version Linux kernel.
> Rename gtp.patch to gtp_for_review.patch.
> Add Linux Kernel patch gtp_3.0_to_upstream.patch(3.0 to upstream),
> gtp_2.6.39.patch(2.6.39), gtp_2.6.33_to_2.6.38.patch(2.6.33 to 2.6.38)
> and gtp_older_to_2.6.32.patch(older to 2.6.32).
Thank you for your upgrade work for the compatibility among various
linux version.
I am testing normally on evaluation board based on ARM cortex using
the latest Linux.
> Then you can include KGTP in your Kernel source tree.
> Add special trace state variable $gtp_version to show the version of KGTP.
> Fix some build errors of gtp_for_review.patch.
> Fix some build errors in ARM.
> Update doc.
> To get other change info please goto https://code.google.com/p/kgtp/wiki/UPDATE
>
> According to the comments of Christoph.  I make a patch for Linux
> Kernel and make it looks OK with checkpatch.pl.  The file
> gtp_for_review.patch is include in the source of KGTP code.
I have one question about KGTP.
Previously, GDB Tracepoints for linux Linux kernel 2.6.19 is developed
by Jim Blandy
of Cygnus. He also presented to share this practical approach at FOSDEM 2007.
If you can, Can you explain the difference(e.g: merits, demerits, and
so on) between
GDB Tracepoint of Jim  and KGTP by you?

>
> Thanks,
> Hui



-- 
Best regards,
Geunsik Lim ( Samsung Electronics )
Blog : http://blog.naver.com/invain/
Homepage: http://leemgs.fedorapeople.org
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