From patchwork Thu Jan 27 06:09:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Tzvetomir Stoyanov (VMware)" X-Patchwork-Id: 12726309 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 D3712C433EF for ; Thu, 27 Jan 2022 06:10:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236443AbiA0GKA (ORCPT ); Thu, 27 Jan 2022 01:10:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45546 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229776AbiA0GJ7 (ORCPT ); Thu, 27 Jan 2022 01:09:59 -0500 Received: from mail-ed1-x533.google.com (mail-ed1-x533.google.com [IPv6:2a00:1450:4864:20::533]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3E221C061714 for ; Wed, 26 Jan 2022 22:09:59 -0800 (PST) Received: by mail-ed1-x533.google.com with SMTP id p7so2113290edc.12 for ; Wed, 26 Jan 2022 22:09:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ddW55m7qz+iV4YPph3iI/aKslp0B+MYXVEL/Kx+jNVY=; b=Yvx932/s2qPwSt6lz77HJf594nNoTt/3PipQP5X7+MFWtfoyz4hT9j0XBYxiE8PO5U A33oNEQkIsPYkxwY2uqb9C1T1hl6Z9xgXb9YiYhoBkHKjCXV9jnSRG0dh5V4e3vUJ4Od xuW0Acqs1NPY7FiwrbSz94RninjxNm+CpW7ydRDmnmLkEgM5I2rcQ5VEIQYGf3sr9+jo 3mPfD0ZH11crw3tcMP4sJjhV15wJlV7eYfMQqxyB7cMr3lbg583Ee/mPZfYl1NJ4Nwn4 opFw3500lXOc06lr3BCmoieahlRWLlQD41+UgREAPm714Vq+bbODf9Kn9CGFijqQ+U/7 S2Yg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ddW55m7qz+iV4YPph3iI/aKslp0B+MYXVEL/Kx+jNVY=; b=L9O30C6EzOuB/qkskbdX7IUaq1xRjFozdpjfjNh8Q2/YdiMGIsYNs0SZaQ2hYU4pCo DHp/aVP4RM1ZJjnFgprvpdz1Vcb5kU6WGL25fHjAQalfAG4ohcP1zaiRItkK+88hxq9i 8U7g7laxdvzHYW2RFbZVCu3i7Lyq2HTeY1YqQkijHroXi+mQKFJ28oNE7i9e8wZHV01B 2IKM9Oy30/jR7mJH6hHm+VX3AhMbMubGaSZn8UNszSCoJPKpkLQQ4rxpJOoALAVTLxS5 H3eZeFnSzsnXsV9OKr1TF1ZJnuUvRZ9piDBxNWlR/EMf1GvnnO+I8Jk7brWTK/2KZMuB vpKA== X-Gm-Message-State: AOAM533UfBAfxD4tZkV7Sd0POXj0TDz4Tf/Tv3ZHytYwX5ySNZcPY5Qi 6+ZyFFxNN6lIA1EsiqWdnC7tZKcUrS0= X-Google-Smtp-Source: ABdhPJyBdY4Sy59/5MIfMT8EtPzkQbG71SdN++Ti4etO2Gdz6uR5fqbyOTIH/XnxZoT5+STBYlTbhQ== X-Received: by 2002:a05:6402:1395:: with SMTP id b21mr2202517edv.305.1643263797847; Wed, 26 Jan 2022 22:09:57 -0800 (PST) Received: from oberon.zico.biz.zico.biz ([83.222.187.186]) by smtp.gmail.com with ESMTPSA id t15sm8279846eju.1.2022.01.26.22.09.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Jan 2022 22:09:57 -0800 (PST) From: "Tzvetomir Stoyanov (VMware)" To: y.karadz@gmail.com Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v2 1/2] trace-cruncher: Add support for event probes Date: Thu, 27 Jan 2022 08:09:53 +0200 Message-Id: <20220127060954.22927-2-tz.stoyanov@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220127060954.22927-1-tz.stoyanov@gmail.com> References: <20220127060954.22927-1-tz.stoyanov@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org Event probe (eprobe) is a new type of ftrace dynamic events, introduced in the Linux kernel 5.15 version. It is useful to have support for it in trace-cruncher, as it allows more flexibility when printing event's data. Signed-off-by: Tzvetomir Stoyanov (VMware) --- src/ftracepy-utils.c | 32 ++++++++++++++++++++++++++++++++ src/ftracepy-utils.h | 2 ++ src/ftracepy.c | 5 +++++ 3 files changed, 39 insertions(+) diff --git a/src/ftracepy-utils.c b/src/ftracepy-utils.c index 8c46590..053b659 100644 --- a/src/ftracepy-utils.c +++ b/src/ftracepy-utils.c @@ -2315,6 +2315,38 @@ struct tep_event *dynevent_get_event(PyDynevent *event, return tep_evt; } +PyObject *PyFtrace_eprobe(PyObject *self, PyObject *args, PyObject *kwargs) +{ + static char *kwlist[] = {"event", "target_system", "target_event", "fetchargs", NULL}; + const char *event, *target_system, *target_event, *fetchargs; + struct tracefs_dynevent *eprobe; + + if (!PyArg_ParseTupleAndKeywords(args, + kwargs, + "ssss", + kwlist, + &event, + &target_system, + &target_event, + &fetchargs)) { + return NULL; + } + + eprobe = tracefs_eprobe_alloc(TC_SYS, event, target_system, target_event, fetchargs); + if (!eprobe) { + MEM_ERROR; + return NULL; + } + + if (tracefs_dynevent_create(eprobe) < 0) { + TfsError_fmt(NULL, "Failed to create eprobe '%s'", event); + tracefs_dynevent_free(eprobe); + return NULL; + } + + return PyDynevent_New(eprobe); +} + static PyObject *set_filter(PyObject *args, PyObject *kwargs, struct tep_handle *tep, struct tep_event *event) diff --git a/src/ftracepy-utils.h b/src/ftracepy-utils.h index 7612df6..c96fd85 100644 --- a/src/ftracepy-utils.h +++ b/src/ftracepy-utils.h @@ -251,6 +251,8 @@ PyObject *PyFtrace_register_kprobe(PyObject *self, PyObject *args, PyObject *PyFtrace_register_kretprobe(PyObject *self, PyObject *args, PyObject *kwargs); +PyObject *PyFtrace_eprobe(PyObject *self, PyObject *args, PyObject *kwargs); + PyObject *PyFtrace_hist(PyObject *self, PyObject *args, PyObject *kwargs); diff --git a/src/ftracepy.c b/src/ftracepy.c index 3f71b5e..0c9f795 100644 --- a/src/ftracepy.c +++ b/src/ftracepy.c @@ -460,6 +460,11 @@ static PyMethodDef ftracepy_methods[] = { METH_VARARGS | METH_KEYWORDS, "Define a kretprobe." }, + {"register_eprobe", + (PyCFunction) PyFtrace_eprobe, + METH_VARARGS | METH_KEYWORDS, + "Define an eprobe." + }, {"hist", (PyCFunction) PyFtrace_hist, METH_VARARGS | METH_KEYWORDS,