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>

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index eac14ce..f4399b2 100644 (file)
--- 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;