Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758490Ab3G3JTX (ORCPT ); Tue, 30 Jul 2013 05:19:23 -0400 Received: from LGEMRELSE6Q.lge.com ([156.147.1.121]:57152 "EHLO LGEMRELSE6Q.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758440Ab3G3JTU (ORCPT ); Tue, 30 Jul 2013 05:19:20 -0400 X-AuditID: 9c930179-b7c49ae000000e68-d6-51f78515063d From: Namhyung Kim To: Arnaldo Carvalho de Melo Cc: Peter Zijlstra , Paul Mackerras , Ingo Molnar , Namhyung Kim , LKML , Steven Rostedt , Frederic Weisbecker , Jiri Olsa , David Ahern , Stephane Eranian , Jeremy Eder Subject: [PATCH 02/17] perf util: Add more debug message on failure path Date: Tue, 30 Jul 2013 18:18:59 +0900 Message-Id: <1375175954-798-3-git-send-email-namhyung@kernel.org> X-Mailer: git-send-email 1.7.11.7 In-Reply-To: <1375175954-798-1-git-send-email-namhyung@kernel.org> References: <1375175954-798-1-git-send-email-namhyung@kernel.org> X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3393 Lines: 140 From: Namhyung Kim It's helpful for debugging on tracing features. Signed-off-by: Namhyung Kim --- tools/perf/util/header.c | 4 ++- tools/perf/util/trace-event-read.c | 53 ++++++++++++++++++++++++++------------ 2 files changed, 39 insertions(+), 18 deletions(-) diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index f558f83769af..11b08f24ba42 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -2700,8 +2700,10 @@ static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel, } event = pevent_find_event(pevent, evsel->attr.config); - if (event == NULL) + if (event == NULL) { + pr_debug("cannot find event format for %d\n", (int)evsel->attr.config); return -1; + } if (!evsel->name) { snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name); diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c index e084e5e654b6..0e3b3f527320 100644 --- a/tools/perf/util/trace-event-read.c +++ b/tools/perf/util/trace-event-read.c @@ -262,39 +262,53 @@ static int read_header_files(struct pevent *pevent) static int read_ftrace_file(struct pevent *pevent, unsigned long long size) { + int ret; char *buf; buf = malloc(size); - if (buf == NULL) + if (buf == NULL) { + pr_debug("memory allocation failure\n"); return -1; + } - if (do_read(buf, size) < 0) { - free(buf); - return -1; + ret = do_read(buf, size); + if (ret < 0) { + pr_debug("error reading ftrace file.\n"); + goto out; } - parse_ftrace_file(pevent, buf, size); + ret = parse_ftrace_file(pevent, buf, size); + if (ret < 0) + pr_debug("error parsing ftrace file.\n"); +out: free(buf); - return 0; + return ret; } static int read_event_file(struct pevent *pevent, char *sys, unsigned long long size) { + int ret; char *buf; buf = malloc(size); - if (buf == NULL) + if (buf == NULL) { + pr_debug("memory allocation failure\n"); return -1; + } - if (do_read(buf, size) < 0) { + ret = do_read(buf, size); + if (ret < 0) { free(buf); - return -1; + goto out; } - parse_event_file(pevent, buf, size, sys); + ret = parse_event_file(pevent, buf, size, sys); + if (ret < 0) + pr_debug("error parsing event file.\n"); +out: free(buf); - return 0; + return ret; } static int read_ftrace_files(struct pevent *pevent) @@ -347,6 +361,7 @@ static int read_saved_cmdline(struct pevent *pevent) { unsigned long long size; char *buf; + int ret; /* it can have 0 size */ size = read8(pevent); @@ -354,18 +369,22 @@ static int read_saved_cmdline(struct pevent *pevent) return 0; buf = malloc(size + 1); - if (buf == NULL) + if (buf == NULL) { + pr_debug("memory allocation failure\n"); return -1; + } - if (do_read(buf, size) < 0) { - free(buf); - return -1; + ret = do_read(buf, size); + if (ret < 0) { + pr_debug("error reading saved cmdlines\n"); + goto out; } parse_saved_cmdline(pevent, buf, size); - + ret = 0; +out: free(buf); - return 0; + return ret; } ssize_t trace_report(int fd, struct pevent **ppevent, bool __repipe) -- 1.7.11.7 -- 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/