perf: Convert perf header build_ids into build_id events

Bypasses the build_id 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.

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: <1270184365-8281-9-git-send-email-tzanussi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 6 insertions, 0 deletions

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 1516c40d47a..0fdf3ebef1e 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -206,6 +206,8 @@ static void perf_event_ops__fill_defaults(struct perf_event_ops *handler)
                 handler->event_type = process_event_stub;
         if (handler->tracing_data == NULL)
                 handler->tracing_data = process_event_stub;
+        if (handler->build_id == NULL)
+                handler->build_id = process_event_stub;
 }
 
 static const char *event__name[] = {
@@ -222,6 +224,7 @@ static const char *event__name[] = {
         [PERF_RECORD_HEADER_ATTR]        = "ATTR",
         [PERF_RECORD_HEADER_EVENT_TYPE]  = "EVENT_TYPE",
         [PERF_RECORD_HEADER_TRACING_DATA]        = "TRACING_DATA",
+        [PERF_RECORD_HEADER_BUILD_ID]    = "BUILD_ID",
 };
 
 unsigned long event__total[PERF_RECORD_HEADER_MAX];
@@ -332,6 +335,7 @@ static event__swap_op event__swap_ops[] = {
         [PERF_RECORD_HEADER_ATTR]   = event__attr_swap,
         [PERF_RECORD_HEADER_EVENT_TYPE]   = event__event_type_swap,
         [PERF_RECORD_HEADER_TRACING_DATA]   = event__tracing_data_swap,
+        [PERF_RECORD_HEADER_BUILD_ID]   = NULL,
         [PERF_RECORD_HEADER_MAX]    = NULL,
 };
 
@@ -380,6 +384,8 @@ static int perf_session__process_event(struct perf_session *self,
                 /* setup for reading amidst mmap */
                 lseek(self->fd, offset + head, SEEK_SET);
                 return ops->tracing_data(event, self);
+        case PERF_RECORD_HEADER_BUILD_ID:
+                return ops->build_id(event, self);
         default:
                 self->unknown_events++;
                 return -1;