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

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Date:	Fri, 23 Dec 2011 14:21:32 +0800
From:	Hui Zhu <teawater@...il.com>
To:	Geunsik Lim <leemgs1@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	"gdb@...rceware.org" <gdb@...rceware.org>,
	kgtp <kgtp@...elists.org>,
	Marc Khouzam <marc.khouzam@...csson.com>,
	Thiago Jung Bauermann <thiago.bauermann@...il.com>,
	Steven <mqyoung@...il.com>, colyli@...il.com,
	Christoph Hellwig <hch@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Randy Dunlap <rdunlap@...otime.net>
Subject: Re: KGTP (Linux Kernel debugger and tracer) 20111218 release

Hi Geunsik,

On Fri, Dec 23, 2011 at 12:58, Geunsik Lim <leemgs1@...il.com> wrote:
> On Sun, Dec 18, 2011 at 9:11 PM, Hui Zhu <teawater@...il.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.

Thanks.  Please tell me if you get some trouble with it.

>> 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?

I am not sure about this one.  Because I cannot find anything about
it.  Could you give me a link or something?

For now, I just know the difference is I am a GDB developer too.  So I
can make KGTP develop more close to GDB devekop.  It can handle some
issue more easy.

Thanks,
Hui

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