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Subject[tip:perf/core] perf tools: Handle both versions of ftrace output
Commit-ID:  0d1da915c76838c9ee7af7cdefbcb2bae9424161
Gitweb: http://git.kernel.org/tip/0d1da915c76838c9ee7af7cdefbcb2bae9424161
Author: Steven Rostedt <srostedt@redhat.com>
AuthorDate: Wed, 14 Oct 2009 15:43:41 -0400
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Thu, 15 Oct 2009 10:42:39 +0200

perf tools: Handle both versions of ftrace output

The ftrace output events can have either arguments or no
arguments. The parser needs to be able to handle both.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <20091014194359.790221427@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
tools/perf/util/trace-event-parse.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c
index 93a82fe..c174765 100644
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -1819,7 +1819,7 @@ static int event_read_print(struct event *event)
if (ret < 0)
return -1;

- return 0;
+ return ret;

fail:
free_token(token);
@@ -3088,6 +3088,9 @@ int parse_ftrace_file(char *buf, unsigned long size)
if (ret < 0)
die("failed to read ftrace event print fmt");

+ /* New ftrace handles args */
+ if (ret > 0)
+ return 0;
/*
* The arguments for ftrace files are parsed by the fields.
* Set up the fields as their arguments.

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