From patchwork Mon Dec 2 10:15:21 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Masami Hiramatsu (Google)" X-Patchwork-Id: 11268915 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 998BC109A for ; Mon, 2 Dec 2019 10:15:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6CCC2217F5 for ; Mon, 2 Dec 2019 10:15:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575281732; bh=RLNMJbSPLLkSH5CC5LK+/NqnOSm2lOCGDXCA4iURBfE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Eno5ZmlvwAjpFOxy5dy5EcWYVFu5OdnNWAHygJZnDYIkWa6D7sSvfklE9zrusZ58O hUiP3+LANv5CGneJs3xEVUsdGrFxg/L38DKyX952QrtnJIZjCliLE9n+ApgyBmfySf 5V79WfkSUDWR4VM+8olS+g7NCIC384EAYp68hhZ8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727650AbfLBKP2 (ORCPT ); Mon, 2 Dec 2019 05:15:28 -0500 Received: from mail.kernel.org ([198.145.29.99]:60428 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727366AbfLBKP2 (ORCPT ); Mon, 2 Dec 2019 05:15:28 -0500 Received: from localhost.localdomain (NE2965lan1.rev.em-net.ne.jp [210.141.244.193]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A6C1D215E5; Mon, 2 Dec 2019 10:15:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575281727; bh=RLNMJbSPLLkSH5CC5LK+/NqnOSm2lOCGDXCA4iURBfE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1utCPNzp+TDsx1/av+a4dpHZFeVH7toccIwSro9CGIQ53E4NGt7OSpgaumqU4Ugle DvRBjjPJjh2QvBc4O1X1xAliVhnhwlmZeB7LXfbwpU1MrhxxuwBTM6mzzyYCsIUnsc kThQOkaiW4+ygggKBMld46rUBl3T0yhEZJFUvBvg= From: Masami Hiramatsu To: Steven Rostedt , Frank Rowand Cc: Ingo Molnar , Namhyung Kim , Tim Bird , Jiri Olsa , Arnaldo Carvalho de Melo , Tom Zanussi , Rob Herring , Andrew Morton , Thomas Gleixner , Greg Kroah-Hartman , Alexey Dobriyan , Jonathan Corbet , Linus Torvalds , linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH v4 11/22] tracing: kprobes: Output kprobe event to printk buffer Date: Mon, 2 Dec 2019 19:15:21 +0900 Message-Id: <157528172132.22451.17813961598420056478.stgit@devnote2> X-Mailer: git-send-email 2.20.1 In-Reply-To: <157528159833.22451.14878731055438721716.stgit@devnote2> References: <157528159833.22451.14878731055438721716.stgit@devnote2> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Since kprobe-events use event_trigger_unlock_commit_regs() directly, that events doesn't show up in printk buffer if "tp_printk" is set. Use trace_event_buffer_commit() in kprobe events so that it can invoke output_printk() as same as other trace events. Signed-off-by: Masami Hiramatsu --- include/linux/trace_events.h | 1 + kernel/trace/trace.c | 4 +-- kernel/trace/trace_events.c | 1 + kernel/trace/trace_kprobe.c | 57 +++++++++++++++++++++--------------------- 4 files changed, 32 insertions(+), 31 deletions(-) diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h index 4c6e15605766..5c94b8bacc88 100644 --- a/include/linux/trace_events.h +++ b/include/linux/trace_events.h @@ -216,6 +216,7 @@ struct trace_event_buffer { void *entry; unsigned long flags; int pc; + struct pt_regs *regs; }; void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer, diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 1a910d173230..dbf57e9ae937 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2674,9 +2674,9 @@ void trace_event_buffer_commit(struct trace_event_buffer *fbuffer) if (static_key_false(&tracepoint_printk_key.key)) output_printk(fbuffer); - event_trigger_unlock_commit(fbuffer->trace_file, fbuffer->buffer, + event_trigger_unlock_commit_regs(fbuffer->trace_file, fbuffer->buffer, fbuffer->event, fbuffer->entry, - fbuffer->flags, fbuffer->pc); + fbuffer->flags, fbuffer->pc, fbuffer->regs); } EXPORT_SYMBOL_GPL(trace_event_buffer_commit); diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 6b3a69e9aa6a..984dc73a72c0 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -272,6 +272,7 @@ void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer, if (!fbuffer->event) return NULL; + fbuffer->regs = NULL; fbuffer->entry = ring_buffer_event_data(fbuffer->event); return fbuffer->entry; } diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index 7f890262c8a3..5899911a5720 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -1175,10 +1175,8 @@ __kprobe_trace_func(struct trace_kprobe *tk, struct pt_regs *regs, struct trace_event_file *trace_file) { struct kprobe_trace_entry_head *entry; - struct ring_buffer_event *event; - struct ring_buffer *buffer; - int size, dsize, pc; - unsigned long irq_flags; + struct trace_event_buffer fbuffer; + int dsize; struct trace_event_call *call = trace_probe_event_call(&tk->tp); WARN_ON(call != trace_file->event_call); @@ -1186,24 +1184,26 @@ __kprobe_trace_func(struct trace_kprobe *tk, struct pt_regs *regs, if (trace_trigger_soft_disabled(trace_file)) return; - local_save_flags(irq_flags); - pc = preempt_count(); + local_save_flags(fbuffer.flags); + fbuffer.pc = preempt_count(); + fbuffer.trace_file = trace_file; dsize = __get_data_size(&tk->tp, regs); - size = sizeof(*entry) + tk->tp.size + dsize; - event = trace_event_buffer_lock_reserve(&buffer, trace_file, - call->event.type, - size, irq_flags, pc); - if (!event) + fbuffer.event = + trace_event_buffer_lock_reserve(&fbuffer.buffer, trace_file, + call->event.type, + sizeof(*entry) + tk->tp.size + dsize, + fbuffer.flags, fbuffer.pc); + if (!fbuffer.event) return; - entry = ring_buffer_event_data(event); + fbuffer.regs = regs; + entry = fbuffer.entry = ring_buffer_event_data(fbuffer.event); entry->ip = (unsigned long)tk->rp.kp.addr; store_trace_args(&entry[1], &tk->tp, regs, sizeof(*entry), dsize); - event_trigger_unlock_commit_regs(trace_file, buffer, event, - entry, irq_flags, pc, regs); + trace_event_buffer_commit(&fbuffer); } static void @@ -1223,10 +1223,8 @@ __kretprobe_trace_func(struct trace_kprobe *tk, struct kretprobe_instance *ri, struct trace_event_file *trace_file) { struct kretprobe_trace_entry_head *entry; - struct ring_buffer_event *event; - struct ring_buffer *buffer; - int size, pc, dsize; - unsigned long irq_flags; + struct trace_event_buffer fbuffer; + int dsize; struct trace_event_call *call = trace_probe_event_call(&tk->tp); WARN_ON(call != trace_file->event_call); @@ -1234,25 +1232,26 @@ __kretprobe_trace_func(struct trace_kprobe *tk, struct kretprobe_instance *ri, if (trace_trigger_soft_disabled(trace_file)) return; - local_save_flags(irq_flags); - pc = preempt_count(); + local_save_flags(fbuffer.flags); + fbuffer.pc = preempt_count(); + fbuffer.trace_file = trace_file; dsize = __get_data_size(&tk->tp, regs); - size = sizeof(*entry) + tk->tp.size + dsize; - - event = trace_event_buffer_lock_reserve(&buffer, trace_file, - call->event.type, - size, irq_flags, pc); - if (!event) + fbuffer.event = + trace_event_buffer_lock_reserve(&fbuffer.buffer, trace_file, + call->event.type, + sizeof(*entry) + tk->tp.size + dsize, + fbuffer.flags, fbuffer.pc); + if (!fbuffer.event) return; - entry = ring_buffer_event_data(event); + fbuffer.regs = regs; + entry = fbuffer.entry = ring_buffer_event_data(fbuffer.event); entry->func = (unsigned long)tk->rp.kp.addr; entry->ret_ip = (unsigned long)ri->ret_addr; store_trace_args(&entry[1], &tk->tp, regs, sizeof(*entry), dsize); - event_trigger_unlock_commit_regs(trace_file, buffer, event, - entry, irq_flags, pc, regs); + trace_event_buffer_commit(&fbuffer); } static void