Add Timeline to dart:developer

runtime/lib/timeline.cc

+// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#include "vm/bootstrap_natives.h"
+
+#include "include/dart_api.h"
+
+#include "vm/native_entry.h"
+#include "vm/object.h"
+#include "vm/os.h"
+#include "vm/timeline.h"
+
+namespace dart {
+
+// Native implementations for the dart:developer library.
+DEFINE_NATIVE_ENTRY(Timeline_getTraceClock, 0) {
+  return Integer::New(OS::GetCurrentTraceMicros(), Heap::kNew, true);
+}
+
+
+DEFINE_NATIVE_ENTRY(Timeline_reportCompleteEvent, 5) {
+  TimelineEventRecorder* recorder = Timeline::recorder();
+  if (recorder == NULL) {
+    return Object::null();
+  }
+
+  if (!isolate->GetDartStream()->Enabled()) {
+    // Dart stream is not enabled for this isolate, do nothing.
+    return Object::null();
+  }
+
+  GET_NON_NULL_NATIVE_ARGUMENT(Integer, start, arguments->NativeArgAt(0));
+  GET_NON_NULL_NATIVE_ARGUMENT(Integer, end, arguments->NativeArgAt(1));
+  GET_NON_NULL_NATIVE_ARGUMENT(String, category, arguments->NativeArgAt(2));
+  GET_NON_NULL_NATIVE_ARGUMENT(String, name, arguments->NativeArgAt(3));
+  GET_NON_NULL_NATIVE_ARGUMENT(String, args, arguments->NativeArgAt(4));
+
+  int64_t duration = end.AsInt64Value() - start.AsInt64Value();
+  int64_t pid = OS::ProcessId();
+  int64_t tid = OSThread::ThreadIdToIntPtr(OSThread::GetCurrentThreadTraceId());
+
+  char* event = OS::SCreate(zone,
+      "{\"name\":\"%s\",\"cat\":\"%s\",\"tid\":%"Pd64",\"pid\":%"Pd64","
+      "\"ts\":%"Pd64",\"ph\":\"X\",\"dur\":%"Pd64",\"args\":%s}",
+      name.ToCString(),
+      category.ToCString(),
+      tid,
+      pid,
+      start.AsInt64Value(),
+      duration,
+      args.ToCString());
+
+  // event was allocated in the zone and will be copied by AppendDartEvent.
+  recorder->AppendDartEvent(isolate, event);
+
+  return Object::null();
+}
+
+}  // namespace dart