perf session: Add ability to 'skip' a non-piped event stream

A piped event stream may contain arbitary sized tracepoint information
following a PERF_RECORD_HEADER_TRACING_DATA event.  The position in the
stream has to be 'skipped' to match the start of the next event.

Provide the same ability to a non-piped event stream to allow for
Instruction Trace data that may also be in a non-piped event stream.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1406143198-20732-1-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index eac14ce0ae8d..f4399b2087c4 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1284,6 +1284,7 @@ int __perf_session__process_events(struct perf_session *session,
         union perf_event *event;
         uint32_t size;
         struct ui_progress prog;
+        int skip;
 
         perf_tool__fill_defaults(tool);
 
@@ -1344,7 +1345,8 @@ more:
         size = event->header.size;
 
         if (size < sizeof(struct perf_event_header) ||
-            perf_session__process_event(session, event, tool, file_pos) < 0) {
+            (skip = perf_session__process_event(session, event, tool, file_pos))
+                                                                        < 0) {
                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
                        file_offset + head, event->header.size,
                        event->header.type);
@@ -1352,6 +1354,9 @@ more:
                 goto out_err;
         }
 
+        if (skip)
+                size += skip;
+
         head += size;
         file_pos += size;