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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 8CF02C4338F for ; Fri, 6 Aug 2021 13:41:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6A8D26113C for ; Fri, 6 Aug 2021 13:41:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344230AbhHFNmI (ORCPT ); Fri, 6 Aug 2021 09:42:08 -0400 Received: from foss.arm.com ([217.140.110.172]:33164 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344186AbhHFNmH (ORCPT ); Fri, 6 Aug 2021 09:42:07 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id B75B631B; Fri, 6 Aug 2021 06:41:51 -0700 (PDT) Received: from e121896.arm.com (unknown [10.57.40.41]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id E31843F40C; Fri, 6 Aug 2021 06:41:48 -0700 (PDT) From: James Clark To: mathieu.poirier@linaro.org, leo.yan@linaro.org, coresight@lists.linaro.org, linux-perf-users@vger.kernel.org, mike.leach@linaro.org Cc: acme@kernel.org, suzuki.poulose@arm.com, James Clark , John Garry , Will Deacon , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 9/9] perf cs-etm: Show a warning for an unknown magic number Date: Fri, 6 Aug 2021 14:41:09 +0100 Message-Id: <20210806134109.1182235-10-james.clark@arm.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210806134109.1182235-1-james.clark@arm.com> References: <20210806134109.1182235-1-james.clark@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-perf-users@vger.kernel.org Currently perf reports "Cannot allocate memory" which isn't very helpful for a potentially user facing issue. If we add a new magic number in the future, perf will be able to report unrecognised magic numbers. Signed-off-by: James Clark --- tools/perf/util/cs-etm.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index 788ad5a099f6..5b276bdb96a6 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -2973,6 +2973,11 @@ int cs_etm__process_auxtrace_info(union perf_event *event, /* ETE shares first part of metadata with ETMv4 */ trcidr_idx = CS_ETMV4_TRCTRACEIDR; + } else { + ui__error("CS ETM Trace: Unrecognised magic number %#"PRIx64". File could be from a newer version of perf.\n", + ptr[i]); + err = -EINVAL; + goto err_free_metadata; } if (!metadata[j]) { -- 2.28.0