From patchwork Fri Mar 11 15:58:40 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Masami Hiramatsu (Google)" X-Patchwork-Id: 12778296 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3A7B0C433EF for ; Fri, 11 Mar 2022 15:58:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344571AbiCKP7z (ORCPT ); Fri, 11 Mar 2022 10:59:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55792 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241374AbiCKP7y (ORCPT ); Fri, 11 Mar 2022 10:59:54 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CC439186421; Fri, 11 Mar 2022 07:58:50 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 0B8FDCE2952; Fri, 11 Mar 2022 15:58:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 68636C340E9; Fri, 11 Mar 2022 15:58:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1647014327; bh=xkk6Hyp9tf1SBuWkafNM2PoMOMKlgQKz/yoJR3HwZpE=; h=From:To:Cc:Subject:Date:From; b=X9dp/+3uU9u61M2mWfpYQV7vbOLOaMCy7Mi7rBcfrEufsJjpDBp/SGpBKs+ojtfm+ MjPbg5vZC1Qf85kcKvp6NdLqlGIrKtEtZDi3xzYaXEpOtLyyt1knrbMLNgujn7I/nc F9UUzgzQM8QSJ0LjiC3AxrueCxLDio2q32AMtLEt6j63MWwfMoZX2Lva1sEhdnSjim VsYbjGzYsT3buixyXyoxqsSGon4aPtxkyjY1SHsuR4OmfobNqQKvvLaa54UiHeV/F0 OwhjZRedi49lc6DbDeE4V7T0FzcDWtsEbYkOhrhwQpEetQIKEuMbcd0r5BaFmpC18v DkhlzPcQXHlMg== From: Masami Hiramatsu To: Jiri Olsa , Alexei Starovoitov , Andrii Nakryiko Cc: Daniel Borkmann , Andrii Nakryiko , Masami Hiramatsu , netdev@vger.kernel.org, bpf@vger.kernel.org, lkml , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Steven Rostedt , "Naveen N . Rao" , Anil S Keshavamurthy , "David S . Miller" Subject: [PATCH v11 00/12] fprobe: Introduce fprobe function entry/exit probe Date: Sat, 12 Mar 2022 00:58:40 +0900 Message-Id: <164701432038.268462.3329725152949938527.stgit@devnote2> X-Mailer: git-send-email 2.25.1 User-Agent: StGit/0.19 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hi, Here is the 11th version of fprobe. This version fixes some issues reported by build bots (Thanks!) and rebased on bpf-next tree. The previous version (v10) is here[1]; [1] https://lore.kernel.org/all/164673771096.1984170.8155877393151850116.stgit@devnote2/T/#u This series introduces the fprobe, the function entry/exit probe with multiple probe point support for x86, arm64 and powerpc64le. This also introduces the rethook for hooking function return as same as the kretprobe does. This abstraction will help us to generalize the fgraph tracer, because we can just switch to it from the rethook in fprobe, depending on the kernel configuration. The patch [1/12] is from Jiri's series[2]. [2] https://lore.kernel.org/all/20220104080943.113249-1-jolsa@kernel.org/T/#u And the patch [9/10] adds the FPROBE_FL_KPROBE_SHARED flag for the case if user wants to share the same code (or share a same resource) on the fprobe and the kprobes. I forcibly updated my kprobes/fprobe branch, you can pull this series from: https://git.kernel.org/pub/scm/linux/kernel/git/mhiramat/linux.git kprobes/fprobe Thank you, --- Jiri Olsa (1): ftrace: Add ftrace_set_filter_ips function Masami Hiramatsu (11): fprobe: Add ftrace based probe APIs rethook: Add a generic return hook rethook: x86: Add rethook x86 implementation arm64: rethook: Add arm64 rethook implementation powerpc: Add rethook support ARM: rethook: Add rethook arm implementation fprobe: Add exit_handler support fprobe: Add sample program for fprobe fprobe: Introduce FPROBE_FL_KPROBE_SHARED flag for fprobe docs: fprobe: Add fprobe description to ftrace-use.rst fprobe: Add a selftest for fprobe Documentation/trace/fprobe.rst | 171 +++++++++++++ Documentation/trace/index.rst | 1 arch/arm/Kconfig | 1 arch/arm/include/asm/stacktrace.h | 4 arch/arm/kernel/stacktrace.c | 6 arch/arm/probes/Makefile | 1 arch/arm/probes/rethook.c | 101 ++++++++ arch/arm64/Kconfig | 1 arch/arm64/include/asm/stacktrace.h | 2 arch/arm64/kernel/probes/Makefile | 1 arch/arm64/kernel/probes/rethook.c | 25 ++ arch/arm64/kernel/probes/rethook_trampoline.S | 87 +++++++ arch/arm64/kernel/stacktrace.c | 7 - arch/powerpc/Kconfig | 1 arch/powerpc/kernel/Makefile | 1 arch/powerpc/kernel/rethook.c | 72 +++++ arch/x86/Kconfig | 1 arch/x86/include/asm/unwind.h | 8 + arch/x86/kernel/Makefile | 1 arch/x86/kernel/kprobes/common.h | 1 arch/x86/kernel/rethook.c | 119 +++++++++ include/linux/fprobe.h | 105 ++++++++ include/linux/ftrace.h | 3 include/linux/kprobes.h | 3 include/linux/rethook.h | 100 ++++++++ include/linux/sched.h | 3 kernel/exit.c | 2 kernel/fork.c | 3 kernel/trace/Kconfig | 26 ++ kernel/trace/Makefile | 2 kernel/trace/fprobe.c | 332 +++++++++++++++++++++++++ kernel/trace/ftrace.c | 58 ++++ kernel/trace/rethook.c | 317 ++++++++++++++++++++++++ lib/Kconfig.debug | 12 + lib/Makefile | 2 lib/test_fprobe.c | 174 +++++++++++++ samples/Kconfig | 7 + samples/Makefile | 1 samples/fprobe/Makefile | 3 samples/fprobe/fprobe_example.c | 120 +++++++++ 40 files changed, 1871 insertions(+), 14 deletions(-) create mode 100644 Documentation/trace/fprobe.rst create mode 100644 arch/arm/probes/rethook.c create mode 100644 arch/arm64/kernel/probes/rethook.c create mode 100644 arch/arm64/kernel/probes/rethook_trampoline.S create mode 100644 arch/powerpc/kernel/rethook.c create mode 100644 arch/x86/kernel/rethook.c create mode 100644 include/linux/fprobe.h create mode 100644 include/linux/rethook.h create mode 100644 kernel/trace/fprobe.c create mode 100644 kernel/trace/rethook.c create mode 100644 lib/test_fprobe.c create mode 100644 samples/fprobe/Makefile create mode 100644 samples/fprobe/fprobe_example.c -- Masami Hiramatsu (Linaro)