TraceProcessor: Add EXPORT_JSON SQL function
Adds basic support for exporting traces in the legacy json format.
Only nestable slices and process/thread names are exported so far.
Bug: 130786269
Change-Id: I8be954c08652b5208ab9d1d33d1548fb930fdefe
diff --git a/src/trace_processor/export_json.h b/src/trace_processor/export_json.h
new file mode 100644
index 0000000..0ceefd8
--- /dev/null
+++ b/src/trace_processor/export_json.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef SRC_TRACE_PROCESSOR_EXPORT_JSON_H_
+#define SRC_TRACE_PROCESSOR_EXPORT_JSON_H_
+
+#include "src/trace_processor/trace_storage.h"
+
+#include <stdio.h>
+
+namespace perfetto {
+namespace trace_processor {
+namespace json {
+
+enum ResultCode {
+ kResultOk = 0,
+ kResultWrongRefType = 1,
+};
+
+// Export trace to a stream in json format.
+ResultCode ExportJson(const TraceStorage* storage, FILE* output);
+
+} // namespace json
+} // namespace trace_processor
+} // namespace perfetto
+
+#endif // SRC_TRACE_PROCESSOR_EXPORT_JSON_H_
