perf record: Intercept all events

The event interception we need to do in 'perf record' to create
a list of all DSOs in PERF_RECORD_MMAP events wasn't seeing all
events, make sure that happens by checking size agains
event_t->header.size.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1263586107-1756-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

tools/perf/builtin-record.c

@@ -113,17 +113,25 @@ static void write_output(void *buf, size_t size)
 
 static void write_event(event_t *buf, size_t size)
 {
+	size_t processed_size = buf->header.size;
+	event_t *ev = buf;
+
+	do {
 		/*
 		* Add it to the list of DSOs, so that when we finish this
 		 * record session we can pick the available build-ids.
 		 */
-	if (buf->header.type == PERF_RECORD_MMAP) {
+		if (ev->header.type == PERF_RECORD_MMAP) {
 			struct list_head *head = &dsos__user;
-		if (buf->mmap.header.misc == 1)
+			if (ev->header.misc == 1)
 				head = &dsos__kernel;
-		__dsos__findnew(head, buf->mmap.filename);
+			__dsos__findnew(head, ev->mmap.filename);
 		}
 
+		ev = ((void *)ev) + ev->header.size;
+		processed_size += ev->header.size;
+	} while (processed_size < size);
+
 	write_output(buf, size);
 }