Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756536Ab1CNNnL (ORCPT ); Mon, 14 Mar 2011 09:43:11 -0400 Received: from e23smtp05.au.ibm.com ([202.81.31.147]:46608 "EHLO e23smtp05.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756524Ab1CNNnH (ORCPT ); Mon, 14 Mar 2011 09:43:07 -0400 From: Srikar Dronamraju 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" 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: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1333 Lines: 43 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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/