From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with ESMTP id 110CA8D003E for ; Mon, 14 Mar 2011 09:44:17 -0400 (EDT) Received: from d23relay04.au.ibm.com (d23relay04.au.ibm.com [202.81.31.246]) by e23smtp02.au.ibm.com (8.14.4/8.13.1) with ESMTP id p2EDbhXa007727 for ; Tue, 15 Mar 2011 00:37:43 +1100 Received: from d23av04.au.ibm.com (d23av04.au.ibm.com [9.190.235.139]) by d23relay04.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id p2EDh5Id2039982 for ; Tue, 15 Mar 2011 00:43:05 +1100 Received: from d23av04.au.ibm.com (loopback [127.0.0.1]) by d23av04.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id p2EDh3IN005865 for ; Tue, 15 Mar 2011 00:43:04 +1100 From: Srikar Dronamraju Date: Mon, 14 Mar 2011 19:07:22 +0530 Message-Id: <20110314133722.27435.55663.sendpatchset@localhost6.localdomain6> In-Reply-To: <20110314133403.27435.7901.sendpatchset@localhost6.localdomain6> References: <20110314133403.27435.7901.sendpatchset@localhost6.localdomain6> Subject: [PATCH v2 2.6.38-rc8-tip 17/20] 17: uprobes: filter chain Sender: owner-linux-mm@kvack.org List-ID: To: Peter Zijlstra , Ingo Molnar Cc: Steven Rostedt , Srikar Dronamraju , Linux-mm , Arnaldo Carvalho de Melo , Linus Torvalds , Christoph Hellwig , Masami Hiramatsu , Ananth N Mavinakayanahalli , Oleg Nesterov , LKML , SystemTap , Jim Keniston , Roland McGrath , Andi Kleen , Andrew Morton , "Paul E. McKenney" Loops through the filters callbacks of currently registered consumers to see if any consumer is interested in tracing this task. Signed-off-by: Srikar Dronamraju --- kernel/uprobes.c | 18 ++++++++++++++++++ 1 files changed, 18 insertions(+), 0 deletions(-) diff --git a/kernel/uprobes.c b/kernel/uprobes.c index bbedcef..e3a3051 100644 --- a/kernel/uprobes.c +++ b/kernel/uprobes.c @@ -428,6 +428,24 @@ static void handler_chain(struct uprobe *uprobe, struct pt_regs *regs) } /* Acquires uprobe->consumer_rwsem */ +static bool filter_chain(struct uprobe *uprobe, struct task_struct *t) +{ + struct uprobe_consumer *consumer; + bool ret = false; + + down_read(&uprobe->consumer_rwsem); + for (consumer = uprobe->consumers; consumer; + consumer = consumer->next) { + if (!consumer->filter || consumer->filter(consumer, t)) { + ret = true; + break; + } + } + up_read(&uprobe->consumer_rwsem); + return ret; +} + +/* Acquires uprobe->consumer_rwsem */ static void add_consumer(struct uprobe *uprobe, struct uprobe_consumer *consumer) { -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org