From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6D72FC43382 for ; Thu, 27 Sep 2018 15:59:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0DEFC216FC for ; Thu, 27 Sep 2018 15:59:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="hd/H3pZl" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0DEFC216FC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727597AbeI0WRx (ORCPT ); Thu, 27 Sep 2018 18:17:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:38162 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727262AbeI0WRw (ORCPT ); Thu, 27 Sep 2018 18:17:52 -0400 Received: from localhost.localdomain (NE2965lan1.rev.em-net.ne.jp [210.141.244.193]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8D10021571; Thu, 27 Sep 2018 15:58:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1538063937; bh=r6nZliiHZmFeIbL0Ct6kZozfeyDGfPW2Vgv9pFrkKNU=; h=From:To:Cc:Subject:Date:From; b=hd/H3pZl0o5JQ9GbdfCcPgN9vGBaCHlroJ1OFvs5sXhsLzZ2EJxDajMUBrHRWC+xL uotT4zrYEKVXpGIQS8SycQl9QdUzFVRCXGx11EqNxp25v11lUwUH9rgEmvzcateaXg CKQ3M2canP0JbFwnjG2QZ1orb1xCvMrsnC7Bq5QQ= From: Masami Hiramatsu To: Steven Rostedt Cc: linux-kernel@vger.kernel.org, Ingo Molnar , Tom Zanussi , Ravi Bangoria Subject: [RFC PATCH 0/5] tracing: Unifying dynamic event interface Date: Fri, 28 Sep 2018 00:58:33 +0900 Message-Id: <153806391326.18458.3927382953014694981.stgit@devbox> X-Mailer: git-send-email 2.13.6 User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, This is an RFC series of unifying dynamic event interface on ftrace. Currently ftrace has 3 dynamic event interfaces, kprobes, uprobes and synthetic. This series unifies kprobes and uprobes event interface on "dynamic_events". This enables us to add new dynamic events easily on same interface, e.g. function events. The older interfaces are left on the tracefs for backward compatibility at this moment. dynamic_events syntax has no different from kprobe_events and uprobe_events. You can use same syntax for dynamic_events interface. I think we can integrate synthetic events to this dynamic_events interface but it will requires new syntax. e.g. echo "s: " >> dynamic_events If it is OK, I'll add it in next version. BTW, since this dynamic_events interface derived from *probe_events, it inherits "all clear when truncate file open" behavior. But if you think this is too aggressive, I can drop it. (even in that case, kprobe_events/uprobe_events behavior is not changed) I also introduced a widely used way to erase entries in other interfaces of ftrace, that is '!'. So you can now use '!event-name' or '!group/event' to erase an entry in dynamic_events. (Wait... it has to be '!p:event' as others do??) Any thought? Thank you, --- Masami Hiramatsu (5): tracing/uprobes: Add busy check when cleanup all uprobes tracing: Add a unified dynamic event framework tracing/kprobes: Use dyn_event framework for kprobe events tracing/uprobes: Use dyn_event framework for uprobe events tracing: Add generic event-name based remove event method Documentation/trace/kprobetrace.rst | 3 + Documentation/trace/uprobetracer.rst | 4 + kernel/trace/Kconfig | 4 + kernel/trace/Makefile | 1 kernel/trace/trace.c | 4 + kernel/trace/trace_dynevent.c | 183 +++++++++++++++++++++++++++++++++ kernel/trace/trace_dynevent.h | 89 ++++++++++++++++ kernel/trace/trace_kprobe.c | 191 +++++++++++++++++++++++----------- kernel/trace/trace_uprobe.c | 175 +++++++++++++++++++++++-------- 9 files changed, 547 insertions(+), 107 deletions(-) create mode 100644 kernel/trace/trace_dynevent.c create mode 100644 kernel/trace/trace_dynevent.h -- Masami Hiramatsu (Linaro)