linux-kernel - Re: [PATCH][RFC 2/23]: SCST core

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 13 Dec 2008 02:25:16 +0100
From:	"Frédéric Weisbecker" <fweisbec@...il.com>
To:	"Arnaldo Carvalho de Melo" <acme@...hat.com>,
	"Steven Rostedt" <srostedt@...hat.com>,
	"Vladislav Bolkhovitin" <vst@...b.net>,
	"Sam Ravnborg" <sam@...nborg.org>, linux-scsi@...r.kernel.org,
	"James Bottomley" <James.Bottomley@...senpartnership.com>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"FUJITA Tomonori" <fujita.tomonori@....ntt.co.jp>,
	"Mike Christie" <michaelc@...wisc.edu>,
	"Jeff Garzik" <jeff@...zik.org>,
	"Boaz Harrosh" <bharrosh@...asas.com>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, scst-devel@...ts.sourceforge.net,
	"Bart Van Assche" <bart.vanassche@...il.com>,
	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
	fweisbec <fweisbec@...il.com>, "Ingo Molnar" <mingo@...e.hu>
Subject: Re: [PATCH][RFC 2/23]: SCST core

2008/12/13 Arnaldo Carvalho de Melo <acme@...hat.com>:
> Steven, is it possible to trigger tracing for any function when a
> function in the list set up by the user is running and then stop tracing
> when it exits?
>
> - Arnaldo
>

Hi Arnaldo,

Yes it's possible with ftrace, by using the function graph tracer ( an
ftrace extension that adds the tracing on return).

To enable it just do:
echo function_graph > /debugfs/tracing/current_tracer

And to trace by choosing a particular function as the root of the call
stack, just do the things
 explained on this patch:
http://git.kernel.org/?p=linux/kernel/git/mingo/linux-2.6-sched-devel.git;a=commit;h=ea4e2bc4d9f7370e57a343ccb5e7c0ad3222ec3c

And the tracing will finish after this function returns :-)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/