perf tools: Add trace-event global object for tracepoint interface

In order to get the proper plugins processing we need to use full
trace-event interface when creating tracepoint events. So far we were
using shortcut to get the parsed format.

Moving current 'event_format__new' function into trace-event object as
'trace_event__tp_format'.

This function uses properly initialized global trace-event object,
ensuring proper plugins processing.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1386076182-14484-11-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 61 insertions, 0 deletions

diff --git a/tools/perf/util/trace-event.c b/tools/perf/util/trace-event.c
index a155a77f3023..d9f5f6137ab3 100644
--- a/tools/perf/util/trace-event.c
+++ b/tools/perf/util/trace-event.c
@@ -1,6 +1,24 @@
 
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <linux/kernel.h>
 #include <traceevent/event-parse.h>
 #include "trace-event.h"
+#include "util.h"
+
+/*
+ * global trace_event object used by trace_event__tp_format
+ *
+ * TODO There's no cleanup call for this. Add some sort of
+ * __exit function support and call trace_event__cleanup
+ * there.
+ */
+static struct trace_event tevent;
 
 int trace_event__init(struct trace_event *t)
 {
@@ -19,3 +37,46 @@ void trace_event__cleanup(struct trace_event *t)
         pevent_free(t->pevent);
         traceevent_unload_plugins(t->plugin_list);
 }
+
+static struct event_format*
+tp_format(const char *sys, const char *name)
+{
+        struct pevent *pevent = tevent.pevent;
+        struct event_format *event = NULL;
+        char path[PATH_MAX];
+        size_t size;
+        char *data;
+
+        scnprintf(path, PATH_MAX, "%s/%s/%s/format",
+                  tracing_events_path, sys, name);
+
+        if (filename__read_str(path, &data, &size))
+                return NULL;
+
+        pevent_parse_format(pevent, &event, data, size, sys);
+
+        free(data);
+        return event;
+}
+
+struct event_format*
+trace_event__tp_format(const char *sys, const char *name)
+{
+        static bool initialized;
+
+        if (!initialized) {
+                int be = traceevent_host_bigendian();
+                struct pevent *pevent;
+
+                if (trace_event__init(&tevent))
+                        return NULL;
+
+                pevent = tevent.pevent;
+                pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT);
+                pevent_set_file_bigendian(pevent, be);
+                pevent_set_host_bigendian(pevent, be);
+                initialized = true;
+        }
+
+        return tp_format(sys, name);
+}