perf thread_map: Add thread_map user level event

Adding the thread_map event to pass/store thread maps as data in
the pipe/perf.data.

Storing the thread ID along with the standard comm[16] thread name string.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Kan Liang <kan.liang@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1445784728-21732-4-git-send-email-jolsa@kernel.org
[ Renamed thread_map_data_event to thread_map_event_entry ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 9774686525b4..36b07b22392d 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -296,6 +296,16 @@ int process_event_auxtrace_error_stub(struct perf_tool *tool __maybe_unused,
         return 0;
 }
 
+
+static
+int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused,
+                                  union perf_event *event __maybe_unused,
+                                  struct perf_session *session __maybe_unused)
+{
+        dump_printf(": unhandled!\n");
+        return 0;
+}
+
 void perf_tool__fill_defaults(struct perf_tool *tool)
 {
         if (tool->sample == NULL)
@@ -346,6 +356,8 @@ void perf_tool__fill_defaults(struct perf_tool *tool)
                 tool->auxtrace = process_event_auxtrace_stub;
         if (tool->auxtrace_error == NULL)
                 tool->auxtrace_error = process_event_auxtrace_error_stub;
+        if (tool->thread_map == NULL)
+                tool->thread_map = process_event_thread_map_stub;
 }
 
 static void swap_sample_id_all(union perf_event *event, void *data)
@@ -616,6 +628,17 @@ static void perf_event__auxtrace_error_swap(union perf_event *event,
         event->auxtrace_error.ip   = bswap_64(event->auxtrace_error.ip);
 }
 
+static void perf_event__thread_map_swap(union perf_event *event,
+                                        bool sample_id_all __maybe_unused)
+{
+        unsigned i;
+
+        event->thread_map.nr = bswap_64(event->thread_map.nr);
+
+        for (i = 0; i < event->thread_map.nr; i++)
+                event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
+}
+
 typedef void (*perf_event__swap_op)(union perf_event *event,
                                     bool sample_id_all);
 
@@ -643,6 +666,7 @@ static perf_event__swap_op perf_event__swap_ops[] = {
         [PERF_RECORD_AUXTRACE_INFO]       = perf_event__auxtrace_info_swap,
         [PERF_RECORD_AUXTRACE]            = perf_event__auxtrace_swap,
         [PERF_RECORD_AUXTRACE_ERROR]      = perf_event__auxtrace_error_swap,
+        [PERF_RECORD_THREAD_MAP]          = perf_event__thread_map_swap,
         [PERF_RECORD_HEADER_MAX]          = NULL,
 };
 
@@ -1179,6 +1203,8 @@ static s64 perf_session__process_user_event(struct perf_session *session,
         case PERF_RECORD_AUXTRACE_ERROR:
                 perf_session__auxtrace_error_inc(session, event);
                 return tool->auxtrace_error(tool, event, session);
+        case PERF_RECORD_THREAD_MAP:
+                return tool->thread_map(tool, event, session);
         default:
                 return -EINVAL;
         }