[tip:perf/core] perf tools: Handle print concatenations in event format file

[tip-bot for Steven Rostedt]

Commit-ID:  924a79af2cdee26a034b9bdce8c9c76995b5c901
Gitweb:     http://git.kernel.org/tip/924a79af2cdee26a034b9bdce8c9c76995b5c901
Author:     Steven Rostedt <srostedt@xxxxxxxxxx>
AuthorDate: Wed, 14 Oct 2009 15:43:32 -0400
Committer:  Ingo Molnar <mingo@xxxxxxx>
CommitDate: Thu, 15 Oct 2009 10:42:34 +0200

perf tools: Handle print concatenations in event format file

kmem_alloc ftrace event format had a string that was broken up
by two tokens. "string 1" "string 2". This patch lets the parser
be able to handle the concatenation.

Signed-off-by: Steven Rostedt <srostedt@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
LKML-Reference: <20091014194357.253818714@xxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
 tools/perf/util/trace-event-parse.c |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c
index eef60df..a05c714 100644
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -1734,6 +1734,7 @@ static int event_read_print(struct event *event)
 	if (read_expect_type(EVENT_DQUOTE, &token) < 0)
 		goto fail;
 
+ concat:
 	event->print_fmt.format = token;
 	event->print_fmt.args = NULL;
 
@@ -1743,6 +1744,21 @@ static int event_read_print(struct event *event)
 	if (type == EVENT_NONE)
 		return 0;
 
+	/* Handle concatination of print lines */
+	if (type == EVENT_DQUOTE) {
+		char *cat;
+
+		cat = malloc_or_die(strlen(event->print_fmt.format) +
+				    strlen(token) + 1);
+		strcpy(cat, event->print_fmt.format);
+		strcat(cat, token);
+		free_token(token);
+		free_token(event->print_fmt.format);
+		event->print_fmt.format = NULL;
+		token = cat;
+		goto concat;
+	}
+			     
 	if (test_type_token(type, token, EVENT_DELIM, (char *)","))
 		goto fail;
 
--
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