Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965365Ab3GRUGR (ORCPT ); Thu, 18 Jul 2013 16:06:17 -0400 Received: from merlin.infradead.org ([205.233.59.134]:41527 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759416Ab3GRTuX (ORCPT ); Thu, 18 Jul 2013 15:50:23 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Namhyung Kim , Namhyung Kim , David Ahern , Frederic Weisbecker , Jiri Olsa , Paul Mackerras , Peter Zijlstra , Steven Rostedt , Arnaldo Carvalho de Melo Subject: [PATCH 28/76] perf util: Parse header_page to get proper long size Date: Thu, 18 Jul 2013 16:49:15 -0300 Message-Id: <1374177003-3706-29-git-send-email-acme@infradead.org> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1374177003-3706-1-git-send-email-acme@infradead.org> References: <1374177003-3706-1-git-send-email-acme@infradead.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by merlin.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2226 Lines: 69 From: Namhyung Kim The header_page file describes the format of the ring buffer page which is used by ftrace (not perf). And size of "commit" field (I guess it's older name was 'size') represents the real size of long type used for kernel. So update the pevent's long size. Signed-off-by: Namhyung Kim Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jiri Olsa Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Steven Rostedt Link: http://lkml.kernel.org/r/1370323231-14022-12-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/trace-event-read.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c index fa45fca..f211227 100644 --- a/tools/perf/util/trace-event-read.c +++ b/tools/perf/util/trace-event-read.c @@ -212,6 +212,7 @@ static int read_ftrace_printk(struct pevent *pevent) static int read_header_files(struct pevent *pevent) { unsigned long long size; + char *header_page; char buf[BUFSIZ]; int ret = 0; @@ -224,7 +225,26 @@ static int read_header_files(struct pevent *pevent) } size = read8(pevent); - skip(size); + + header_page = malloc(size); + if (header_page == NULL) + return -1; + + if (do_read(header_page, size) < 0) { + pr_debug("did not read header page"); + free(header_page); + return -1; + } + + if (!pevent_parse_header_page(pevent, header_page, size, + pevent_get_long_size(pevent))) { + /* + * The commit field in the page is of type long, + * use that instead, since it represents the kernel. + */ + pevent_set_long_size(pevent, pevent->header_page_size_size); + } + free(header_page); if (do_read(buf, 13) < 0) return -1; -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/