1 files changed, 130 insertions, 0 deletions
diff --git a/runtimes/contrib/xtrace/src/event_recorder.cc b/runtimes/contrib/xtrace/src/event_recorder.cc
new file mode 100644
index 000000000..780eae19b
--- /dev/null
+++ b/runtimes/contrib/xtrace/src/event_recorder.cc
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "event_recorder.h"
+#include "str.h"
+
+#include <vector>
+
+namespace
+{
+
+std::string quote(const std::string &value)
+{
+  std::stringstream ss;
+  ss << '"' << value << '"';
+  return ss.str();
+}
+
+std::string field(const std::string &k, const std::string &v)
+{
+  std::stringstream ss;
+  ss << quote(k) << " : " << quote(v);
+  return ss.str();
+}
+
+struct Content // One Entry in Chrome Event Trace
+{
+  std::vector<std::pair<std::string, std::string>> flds;
+  std::vector<std::pair<std::string, std::string>> args;
+};
+
+std::string object(const Content &content)
+{
+  std::stringstream ss;
+
+  ss << "{ ";
+
+  ss << field(content.flds[0].first, content.flds[0].second);
+
+  for (uint32_t n = 1; n < content.flds.size(); ++n)
+  {
+    ss << ", " << field(content.flds.at(n).first, content.flds.at(n).second);
+  }
+
+  if (content.args.size() > 0)
+  {
+    ss << ", " << quote("args") << " : { ";
+    ss << field(content.args.at(0).first, content.args.at(0).second);
+
+    for (uint32_t n = 1; n < content.args.size(); ++n)
+    {
+      ss << ", " << field(content.args.at(n).first, content.args.at(n).second);
+    }
+
+    ss << "}";
+  }
+
+  ss << " }";
+
+  return ss.str();
+}
+
+void fill(Content &content, const Event &evt)
+{
+  content.flds.emplace_back("name", evt.name);
+  content.flds.emplace_back("pid", "0");
+  content.flds.emplace_back("tid", "0");
+  content.flds.emplace_back("ph", evt.ph);
+  content.flds.emplace_back("ts", evt.ts);
+}
+
+std::string object(const DurationEvent &evt)
+{
+  Content content;
+
+  fill(content, evt);
+
+  return ::object(content);
+}
+
+std::string object(const CounterEvent &evt)
+{
+  Content content;
+
+  fill(content, evt);
+
+  for (auto it = evt.values.begin(); it != evt.values.end(); ++it)
+  {
+    content.args.emplace_back(it->first, it->second);
+  }
+
+  return ::object(content);
+}
+
+} // namespace
+
+void EventRecorder::init()
+{
+  _os << "{" << std::endl;
+  _os << "  " << quote("traceEvents") << ": [" << std::endl;
+}
+
+void EventRecorder::emit(const DurationEvent &evt)
+{
+  _os << "    " << object(evt) << "," << std::endl;
+}
+void EventRecorder::emit(const CounterEvent &evt)
+{
+  _os << "    " << object(evt) << "," << std::endl;
+}
+
+void EventRecorder::fini()
+{
+  _os << "    { }" << std::endl;
+  _os << "  ]" << std::endl;
+  _os << "}" << std::endl;
+}