From patchwork Fri Apr 19 08:30:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tzvetomir Stoyanov X-Patchwork-Id: 10909769 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 92AF814DB for ; Fri, 19 Apr 2019 20:19:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 82AA227F81 for ; Fri, 19 Apr 2019 20:19:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 76C5828495; Fri, 19 Apr 2019 20:19:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1E33627F81 for ; Fri, 19 Apr 2019 20:19:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726109AbfDSUTA (ORCPT ); Fri, 19 Apr 2019 16:19:00 -0400 Received: from mail-ed1-f54.google.com ([209.85.208.54]:38587 "EHLO mail-ed1-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725817AbfDSUTA (ORCPT ); Fri, 19 Apr 2019 16:19:00 -0400 Received: by mail-ed1-f54.google.com with SMTP id d13so5248858edr.5 for ; Fri, 19 Apr 2019 13:18:59 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=+JFqCw91JAPPrzvRGPb/+EPBs5Pj0EM9LP1zSNiH6II=; b=hbOuoYJUHV1F8q1lp1GawXe5kfIpE4xqI2mIPHrrkhPgoSsvQaRjd81RgtxPokEXp9 rlIkdQZGdAQnA9nPLqFGSQi4Jt1lKWLo8gjmYRZoz1DnE4FHAPkEDCYHQdlq7eV/yVzx tyYbKqcAwkeHhdLR2dzsIq9T5HBtfHut6k5yG6AOXHHG5ya6g4DuC3y+b1OmE1M7ZhD5 aaoMgkBezEbRuRJwKHGjppFu8pnwrLNFf9ZJDSRMJTvVfhwaRr8KJNxDZRtfIMD/8cjO fu5CipPOfvsgYwDqPFWp/VmI0I24h3R2JlCJ7YnULisXoskWVSR9uAcxvr684/wywne/ J1Gg== X-Gm-Message-State: APjAAAVgXDSLk/nwcQOeG6VwzvsJKpLVn4yf0w2Acs84WygA6D56V6WE Bqs2TxnHhlwmYYiJfvw0JAnvw+pb X-Google-Smtp-Source: APXvYqz9HulIo769/oZdJR+TqOKL/o5v8xBXYaC4lQZBuAtah4hMFPxOqZWQYitBIqFnfNzFbSABfA== X-Received: by 2002:a50:c44d:: with SMTP id w13mr1677702edf.50.1555662603969; Fri, 19 Apr 2019 01:30:03 -0700 (PDT) Received: from oberon.eng.vmware.com ([146.247.46.5]) by smtp.gmail.com with ESMTPSA id cg22sm779467ejb.2.2019.04.19.01.30.02 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 19 Apr 2019 01:30:03 -0700 (PDT) From: Tzvetomir Stoyanov To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH] trace-cmd: Load trace-cmd plugins from build folder, if exists Date: Fri, 19 Apr 2019 11:30:02 +0300 Message-Id: <20190419083002.17909-1-tstoyanov@vmware.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When a development version of trace-cmd is built and run on the machine, by default it loads all plugins from predefined drierctories : (install_preffix)/lib/traceevent/plugins ~/.traceevent/plugins the path specified in TRACEEVENT_PLUGIN_DIR environment variable. In case there is a legacy trace-cmd version already installed, there will be a collision with the development version. Wrong, incompatible plugins will be loaded. To simplify the development process, a new logic is added: On trace-cmd build stage, the full build path is stored in the trace-cmd binary. When the application is started, it checks if this build directory exists and loads only plugins from it. Signed-off-by: Tzvetomir Stoyanov --- Makefile | 2 ++ lib/trace-cmd/trace-util.c | 10 ++++++++++ 2 files changed, 12 insertions(+) diff --git a/Makefile b/Makefile index cde45f8..534d882 100644 --- a/Makefile +++ b/Makefile @@ -207,6 +207,8 @@ LDFLAGS ?= export CFLAGS export INCLUDES +override CFLAGS += -DBUILD_PLUGIN_PATH="\"$(shell $(shell which pwd))/plugins"\" + # Required CFLAGS override CFLAGS += -D_GNU_SOURCE diff --git a/lib/trace-cmd/trace-util.c b/lib/trace-cmd/trace-util.c index 8d21fb2..ea4f430 100644 --- a/lib/trace-cmd/trace-util.c +++ b/lib/trace-cmd/trace-util.c @@ -1374,11 +1374,21 @@ int trace_util_load_plugins(struct tep_handle *pevent, const char *suffix, char *home; char *path; char *envdir; + struct stat sb; int ret; if (tracecmd_disable_plugins) return -EBUSY; +#ifdef BUILD_PLUGIN_PATH + if (stat(BUILD_PLUGIN_PATH, &sb) == 0 && S_ISDIR(sb.st_mode)) { + trace_util_load_plugins_dir(pevent, suffix, BUILD_PLUGIN_PATH, + load_plugin, data); + return 0; + } +#endif + + /* If a system plugin directory was defined, check that first */ #ifdef PLUGIN_DIR if (!tracecmd_disable_sys_plugins)