From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 11531 invoked by alias); 25 Dec 2013 16:51:24 -0000 Mailing-List: contact gdb-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sourceware.org Received: (qmail 11521 invoked by uid 89); 25 Dec 2013 16:51:24 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.5 required=5.0 tests=AWL,BAYES_00,RP_MATCHES_RCVD autolearn=ham version=3.3.2 X-HELO: mircat.net Received: from mircat.net (HELO mircat.net) (81.9.105.50) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES256-SHA encrypted) ESMTPS; Wed, 25 Dec 2013 16:51:23 +0000 Received: from [192.168.0.77] (port=33948 helo=dooku.mircat.net) by mircat.net with esmtpsa (TLSv1:CAMELLIA256-SHA:256) (Exim 4.77) (envelope-from ) id 1Vvrfy-000EJy-Ci; Wed, 25 Dec 2013 20:51:18 +0400 Message-ID: <52BB0D06.3000208@samersoff.net> Date: Wed, 25 Dec 2013 16:51:00 -0000 From: Dmitry Samersoff User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: Joel Brobecker CC: Hui Zhu , "gdb@sourceware.org" , abhijit.k.halder@gmail.com Subject: Re: How to write native (i.e. C/C++) plugin for gdb? References: <52B97EB4.9070100@samersoff.net> <52B9966B.8050104@samersoff.net> <20131224144704.GJ4558@adacore.com> <52BAFA96.8060407@samersoff.net> In-Reply-To: <52BAFA96.8060407@samersoff.net> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-IsSubscribed: yes X-SW-Source: 2013-12/txt/msg00080.txt.bz2 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Everyone, Just found a year old discussion about Abhijit proposal. So answering to upcoming question - why not a Python. Python is very good staff if your speak about source level debugging. If you have to debug optimized binary python doesn't help match for two reason - 1) you have to port all native data structure you plan to work with to python. 2) python performance is not always acceptable and you not always ever able to run a python. To get a better picture of native plugins in action, please, take a look at solaris mdb. - -Dmitry On 2013-12-25 19:32, Dmitry Samersoff wrote: > Joel, > > Thank you for the response. > > I found this patch > https://sourceware.org/ml/gdb-patches/2012-05/msg00500.html - many > thanks to Abhijit. > > 1. What is the reason to keep it off main trunk? Is there a chance > to have it changed? > > 2. What API is available from within a plugin? i.e. how I can > access coredump memory? > > -Dmitry > > On 2013-12-24 18:47, Joel Brobecker wrote: >>> I need to implement scenario like one below: >>> >>> (gdb) load-plugin libgdbjvm.so (gdb) attach PID (gdb) jvm >>> show loaded-classes (gdb) jvm show java-threads (gdb) jvm show >>> code-cache > >> Maybe you could add some routines in your program that are solely >> intended for debugging purposes, and then define commands that >> call those routines. Off hand, that's the only way I can think >> of. Otherwise, interface the C++ stuff you need from Python - if >> necessary, export some stuff to C? > > > > - -- Dmitry Samersoff Saint Petersburg, Russia, http://devnull.samersoff.net * There will come soft rains ... -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.20 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJSuw0GAAoJEHEy08c4gIABbiwIAJJlEmMZ16o3JJibuY7X5sLL VOVxfJfMox78zaGERdrS/lQqFege+JN1qBcaVjg4HGbSl71aA0t11JR6W+Vv06UZ JK82axJqDkR2hOjz8oy9LeZNGOgLeE1zcjCwYVbyuj7hhENaDBZTadq94pc5dOsi aBAVqPrDe9ufgBeriHD5uym1lwYEk4EOW8jBEU4ToO5PUUtVTIG6i4WeXjwMBAxh z1ZCRR46WRXKpL1LQw6X6jOWpXL/6nnoS3A9j4zKGXG8xHiM8K8zyrZPBRsB26A8 t+FLEPeFg7pAuARnlDNLaEHX4lEjifqoGafyw7L+KbVPdC1INYQ+Ld8Q+yg/jMg= =baN/ -----END PGP SIGNATURE-----