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 X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 330DDC43387 for ; Fri, 21 Dec 2018 12:08:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 06059218FD for ; Fri, 21 Dec 2018 12:08:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390297AbeLUMI2 (ORCPT ); Fri, 21 Dec 2018 07:08:28 -0500 Received: from mga03.intel.com ([134.134.136.65]:34195 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390242AbeLUMIP (ORCPT ); Fri, 21 Dec 2018 07:08:15 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 Dec 2018 04:08:14 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,381,1539673200"; d="scan'208";a="131862512" Received: from ahunter-desktop.fi.intel.com ([10.237.72.130]) by fmsmga001.fm.intel.com with ESMTP; 21 Dec 2018 04:08:13 -0800 From: Adrian Hunter To: Arnaldo Carvalho de Melo Cc: Jiri Olsa , linux-kernel@vger.kernel.org Subject: [PATCH 6/8] perf thread-stack: Allocate an array of thread stacks Date: Fri, 21 Dec 2018 14:06:18 +0200 Message-Id: <20181221120620.9659-7-adrian.hunter@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181221120620.9659-1-adrian.hunter@intel.com> References: <20181221120620.9659-1-adrian.hunter@intel.com> Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In preparation for fixing thread stack processing for the idle task, allocate an array of thread stacks. Signed-off-by: Adrian Hunter --- tools/perf/util/thread-stack.c | 30 ++++++++++++++++++------------ 1 file changed, 18 insertions(+), 12 deletions(-) diff --git a/tools/perf/util/thread-stack.c b/tools/perf/util/thread-stack.c index 4340381d54c2..a896d89fe5f7 100644 --- a/tools/perf/util/thread-stack.c +++ b/tools/perf/util/thread-stack.c @@ -114,20 +114,26 @@ static int thread_stack__init(struct thread_stack *ts, struct thread *thread, static struct thread_stack *thread_stack__new(struct thread *thread, struct call_return_processor *crp) { - struct thread_stack *ts; - - ts = zalloc(sizeof(struct thread_stack)); - if (!ts) - return NULL; - - ts->arr_sz = 1; - - if (thread_stack__init(ts, thread, crp)) { - free(ts); - return NULL; + struct thread_stack *ts = thread->ts, *new_ts; + unsigned int old_sz = ts ? ts->arr_sz : 0; + unsigned int new_sz = 1; + + if (!ts || new_sz > old_sz) { + new_ts = calloc(new_sz, sizeof(*ts)); + if (!new_ts) + return NULL; + if (ts) + memcpy(new_ts, ts, old_sz * sizeof(*ts)); + new_ts->arr_sz = new_sz; + if (thread->ts) + zfree(&thread->ts); + thread->ts = new_ts; + ts = new_ts; } - thread->ts = ts; + if (!ts->stack && + thread_stack__init(ts, thread, crp)) + return NULL; return ts; } -- 2.17.1