Add Dart_Save/LoadCompilationTrace.

runtime/vm/compilation_trace.h

Index: runtime/vm/compilation_trace.h
diff --git a/runtime/vm/compilation_trace.h b/runtime/vm/compilation_trace.h
new file mode 100644
index 0000000000000000000000000000000000000000..cf7530cc74e20361ae23e15752e0ea9eade8d642
--- /dev/null
+++ b/runtime/vm/compilation_trace.h
@@ -0,0 +1,64 @@
+// Copyright (c) 2017, 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.
+
+#ifndef RUNTIME_VM_COMPILATION_TRACE_H_
+#define RUNTIME_VM_COMPILATION_TRACE_H_
+
+#include "platform/assert.h"
+#include "vm/compiler.h"
+#include "vm/object.h"
+#include "vm/program_visitor.h"
+#include "vm/zone_text_buffer.h"
+
+namespace dart {
+
+class CompilationTraceSaver : public FunctionVisitor {
+ public:
+  explicit CompilationTraceSaver(Zone* zone);
+  void Visit(const Function& function);
+
+  void StealBuffer(uint8_t** buffer, intptr_t* buffer_length) {
+    *buffer = reinterpret_cast<uint8_t*>(buf_.buffer());
+    *buffer_length = buf_.length() + 1;  // Include terminating NUL.
+  }
+
+ private:
+  ZoneTextBuffer buf_;
+  String& func_name_;
+  Class& cls_;
+  String& cls_name_;
+  Library& lib_;
+  String& uri_;
+};
+
+class CompilationTraceLoader : public ValueObject {
+ public:
+  explicit CompilationTraceLoader(Thread* thread);
+
+  RawObject* CompileTrace(char* buffer);
+
+ private:
+  RawObject* CompileTriple(const char* uri_cstr,
+                           const char* cls_cstr,
+                           const char* func_cstr);
+  RawObject* CompileFunction(const Function& function);
+  RawObject* EvaluateInitializer(const Field& field);
+
+  Thread* thread_;
+  Zone* zone_;
+  String& uri_;
+  String& class_name_;
+  String& function_name_;
+  String& function_name2_;
+  Library& lib_;
+  Class& cls_;
+  Function& function_;
+  Function& function2_;
+  Field& field_;
+  Object& error_;
+};
+
+}  // namespace dart
+
+#endif  // RUNTIME_VM_COMPILATION_TRACE_H_