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Re: [PATCH v3 2.6.39-rc1-tip 26/26] 26: uprobes: filter chain
- From: Masami Hiramatsu <masami dot hiramatsu dot pt at hitachi dot com>
- To: Srikar Dronamraju <srikar at linux dot vnet dot ibm dot com>
- Cc: Peter Zijlstra <peterz at infradead dot org>, Ingo Molnar <mingo at elte dot hu>, Steven Rostedt <rostedt at goodmis dot org>, Linux-mm <linux-mm at kvack dot org>, Arnaldo Carvalho de Melo <acme at infradead dot org>, Linus Torvalds <torvalds at linux-foundation dot org>, Ananth N Mavinakayanahalli <ananth at in dot ibm dot com>, Christoph Hellwig <hch at infradead dot org>, Andi Kleen <andi at firstfloor dot org>, Thomas Gleixner <tglx at linutronix dot de>, Jonathan Corbet <corbet at lwn dot net>, Oleg Nesterov <oleg at redhat dot com>, Andrew Morton <akpm at linux-foundation dot org>, Jim Keniston <jkenisto at linux dot vnet dot ibm dot com>, Roland McGrath <roland at hack dot frob dot com>, SystemTap <systemtap at sources dot redhat dot com>, LKML <linux-kernel at vger dot kernel dot org>
- Date: Tue, 05 Apr 2011 10:27:04 +0900
- Subject: Re: [PATCH v3 2.6.39-rc1-tip 26/26] 26: uprobes: filter chain
- References: <20110401143223.15455.19844.sendpatchset@localhost6.localdomain6> <20110401143737.15455.30181.sendpatchset@localhost6.localdomain6>
(2011/04/01 23:37), Srikar Dronamraju wrote:
> 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 <srikar@linux.vnet.ibm.com>
> ---
> kernel/uprobes.c | 17 +++++++++++++++++
> 1 files changed, 17 insertions(+), 0 deletions(-)
>
> diff --git a/kernel/uprobes.c b/kernel/uprobes.c
> index c950f13..62ccb56 100644
> --- a/kernel/uprobes.c
> +++ b/kernel/uprobes.c
> @@ -450,6 +450,23 @@ static void handler_chain(struct uprobe *uprobe, struct pt_regs *regs)
> up_read(&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;
> +}
> +
Where this function is called from ? This patch seems the last one of this series...
Thank you,
--
Masami HIRAMATSU
Software Platform Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@hitachi.com