perf: Convert perf header attrs into attr events

Bypasses the attr perf header code and replaces it with a
synthesized event and processing function that accomplishes the
same thing, used when reading/writing perf data to/from a pipe.

Making the attrs into events allows them to be streamed over a
pipe along with the rest of the header data (in later patches).
It also paves the way to allowing events to be added and removed
from perf sessions dynamically.

Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: fweisbec@gmail.com
Cc: rostedt@goodmis.org
Cc: k-keiichi@bx.jp.nec.com
Cc: acme@ghostprotocols.net
LKML-Reference: <1270184365-8281-6-git-send-email-tzanussi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 9 insertions, 1 deletions

diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 5c1eba671305..b4fbf25078b9 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -84,7 +84,14 @@ struct build_id_event {
 };
 
 enum perf_header_event_type { /* above any possible kernel type */
-        PERF_RECORD_HEADER_MAX                  = 64,
+        PERF_RECORD_HEADER_ATTR                 = 64,
+        PERF_RECORD_HEADER_MAX
+};
+
+struct attr_event {
+        struct perf_event_header header;
+        struct perf_event_attr attr;
+        u64 id[];
 };
 
 typedef union event_union {
@@ -96,6 +103,7 @@ typedef union event_union {
         struct lost_event               lost;
         struct read_event               read;
         struct sample_event             sample;
+        struct attr_event               attr;
 } event_t;
 
 struct events_stats {