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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A7D8DC433F5 for ; Mon, 31 Jan 2022 05:00:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230241AbiAaFAg (ORCPT ); Mon, 31 Jan 2022 00:00:36 -0500 Received: from dfw.source.kernel.org ([139.178.84.217]:49314 "EHLO dfw.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229464AbiAaFAc (ORCPT ); Mon, 31 Jan 2022 00:00:32 -0500 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 dfw.source.kernel.org (Postfix) with ESMTPS id 97F1C611CB; Mon, 31 Jan 2022 05:00:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5FECFC340E8; Mon, 31 Jan 2022 05:00:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1643605231; bh=SPlApvXmSAF/EmHfhsNx/9J8MUckNRlaZjFc5d87Irk=; h=From:To:Cc:Subject:Date:From; b=beHhSAPAUaVm4tVLK4IevjpquuaPE3nPWHRczFcRIYwQE0s7WPVVCz2LOZo7HLCGG +NsIbKvzULUzHLcGOjQXblFkfGhLXXf8qV6Ymm3X6XfTRZzyJzfY3OgHwVvYMba3ED zpkqPW+wRTG9me68utz+JLOQhOdFEazdLhKSRil/i6lt/FcSZMrLepHzZtdwbWZphT 6AlvyUQO2bFhI6HTcL4VihXnv7IHyDULNRjN2lJEX4+aGCAdOlQ1kY9uUkXQGSnEpC AEyigayX7pJG8Q9Nm2oqj7S+KO67Iwth5nOo40lT1zgKKyUqyrUbv9daULlKJMj+4E 1OIeKDTyivDIw== From: Masami Hiramatsu To: Jiri Olsa , Alexei Starovoitov 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 v7 00/10] fprobe: Introduce fprobe function entry/exit probe Date: Mon, 31 Jan 2022 14:00:24 +0900 Message-Id: <164360522462.65877.1891020292202285106.stgit@devnote2> X-Mailer: git-send-email 2.25.1 User-Agent: StGit/0.19 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Hi, Here is the 7th version of fprobe. This version fixes unregister_fprobe() ensures that exit_handler is not called after returning from the unregister_fprobe(), and fixes some comments and documents. The previous version is here[1]; [1] https://lore.kernel.org/all/164338031590.2429999.6203979005944292576.stgit@devnote2/T/#u This series introduces the fprobe, the function entry/exit probe with multiple probe point support. 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 [1/10] 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. Thank you, --- Jiri Olsa (1): ftrace: Add ftrace_set_filter_ips function Masami Hiramatsu (9): fprobe: Add ftrace based probe APIs rethook: Add a generic return hook rethook: x86: Add rethook x86 implementation ARM: rethook: Add rethook arm implementation arm64: rethook: Add arm64 rethook 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 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 | 71 +++++ 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/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 | 115 ++++++++ include/linux/fprobe.h | 97 +++++++ 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 | 341 +++++++++++++++++++++++++ kernel/trace/ftrace.c | 58 ++++ kernel/trace/rethook.c | 313 +++++++++++++++++++++++ samples/Kconfig | 7 + samples/Makefile | 1 samples/fprobe/Makefile | 3 samples/fprobe/fprobe_example.c | 120 +++++++++ 34 files changed, 1572 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/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 samples/fprobe/Makefile create mode 100644 samples/fprobe/fprobe_example.c -- Masami Hiramatsu (Linaro)