linux-kernel - [PATCH 2/3] tools lib traceevent: Get rid of die() from pevent_register_event

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Date:	Fri,  7 Sep 2012 11:49:46 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Steven Rostedt <rostedt@...dmis.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Namhyung Kim <namhyung.kim@....com>
Subject: [PATCH 2/3] tools lib traceevent: Get rid of die() from pevent_register_event_handler

From: Namhyung Kim <namhyung.kim@....com>

If memory allocation for handler fails, return gracefully instead of
calling die().  Note that casts to void * are needed because gcc
complained about discarding 'const' qualifier during implicit argument
cast.

Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/lib/traceevent/event-parse.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 6d5e75987a3d..17fd01d46e60 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -5183,7 +5183,12 @@ int pevent_register_event_handler(struct pevent *pevent,
 
  not_found:
 	/* Save for later use. */
-	handle = malloc_or_die(sizeof(*handle));
+	handle = malloc(sizeof(*handle));
+	if (!handle) {
+		do_warning("Failed to allocate event handler");
+		return PEVENT_ERRNO__MEM_ALLOC_FAILED;
+	}
+
 	memset(handle, 0, sizeof(*handle));
 	handle->id = id;
 	if (event_name)
@@ -5193,7 +5198,11 @@ int pevent_register_event_handler(struct pevent *pevent,
 
 	if ((event_name && !handle->event_name) ||
 	    (sys_name && !handle->sys_name)) {
-		die("Failed to allocate event/sys name");
+		do_warning("Failed to allocate event/sys name");
+		free((void *)handle->event_name);
+		free((void *)handle->sys_name);
+		free(handle);
+		return PEVENT_ERRNO__MEM_ALLOC_FAILED;
 	}
 
 	handle->func = func;
-- 
1.7.11.4

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