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Date: Wed, 27 May 2009 21:25:08 GMT
From: tip-bot for Ingo Molnar <mingo@elte.hu>
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Subject: [tip:perfcounters/core] pref_counter: tools: report: Robustify in case of weird events
Message-ID: <tip-55717314c4e3a5180a54228a2f97e50f3496de4c@git.kernel.org>
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Commit-ID:  55717314c4e3a5180a54228a2f97e50f3496de4c
Gitweb:     http://git.kernel.org/tip/55717314c4e3a5180a54228a2f97e50f3496de4c
Author:     Ingo Molnar <mingo@elte.hu>
AuthorDate: Wed, 27 May 2009 22:13:17 +0200
Committer:  Ingo Molnar <mingo@elte.hu>
CommitDate: Wed, 27 May 2009 22:19:58 +0200

pref_counter: tools: report: Robustify in case of weird events

This error condition:

  aldebaran:~/linux/linux/Documentation/perf_counter> perf report
  dso__load_sym: cannot get elf header.
  failed to open: /etc/ld.so.cache
  problem processing PERF_EVENT_MMAP, bailing out

caused the profile to be very short - as the error was at the beginning
of the file and we bailed out completely.

Be more permissive and consider the event broken instead.

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>


---
 Documentation/perf_counter/builtin-report.c |   17 ++++++++---------
 1 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/Documentation/perf_counter/builtin-report.c b/Documentation/perf_counter/builtin-report.c
index 6df95c2..5993c12 100644
--- a/Documentation/perf_counter/builtin-report.c
+++ b/Documentation/perf_counter/builtin-report.c
@@ -1117,9 +1117,9 @@ more:
 		}
 
 		if (thread == NULL) {
-			fprintf(stderr, "problem processing %d event, bailing out\n",
+			fprintf(stderr, "problem processing %d event, skipping it.\n",
 				event->header.type);
-			goto done;
+			goto broken_event;
 		}
 
 		if (event->header.misc & PERF_EVENT_MISC_KERNEL) {
@@ -1149,8 +1149,8 @@ more:
 
 			if (hist_entry__add(thread, map, dso, sym, ip, level)) {
 				fprintf(stderr,
-		"problem incrementing symbol count, bailing out\n");
-				goto done;
+		"problem incrementing symbol count, skipping event\n");
+				goto broken_event;
 			}
 		}
 		total++;
@@ -1169,8 +1169,8 @@ more:
 				event->mmap.filename);
 		}
 		if (thread == NULL || map == NULL) {
-			fprintf(stderr, "problem processing PERF_EVENT_MMAP, bailing out\n");
-			goto done;
+			fprintf(stderr, "problem processing PERF_EVENT_MMAP, skipping event.\n");
+			goto broken_event;
 		}
 		thread__insert_map(thread, map);
 		total_mmap++;
@@ -1187,8 +1187,8 @@ more:
 		}
 		if (thread == NULL ||
 		    thread__set_comm(thread, event->comm.comm)) {
-			fprintf(stderr, "problem processing PERF_EVENT_COMM, bailing out\n");
-			goto done;
+			fprintf(stderr, "problem processing PERF_EVENT_COMM, skipping event.\n");
+			goto broken_event;
 		}
 		total_comm++;
 		break;
@@ -1221,7 +1221,6 @@ broken_event:
 		goto more;
 
 	rc = EXIT_SUCCESS;
-done:
 	close(input);
 
 	if (dump_trace) {