// Copyright (c) 2020, 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/globals.h"
#include "vm/object.h"
#include "vm/symbols.h"

namespace dart {

// Add function to a class and that class to the class dictionary so that
// frame walking can be used.
const Function& RegisterFakeFunction(const char* name, const Code& code) {
  Thread* thread = Thread::Current();
  const String& class_name = String::Handle(Symbols::New(thread, "ownerClass"));
  const Script& script = Script::Handle();
  const Library& lib = Library::Handle(Library::CoreLibrary());
  const Class& owner_class = Class::Handle(
      Class::New(lib, class_name, script, TokenPosition::kNoSource));
  const String& function_name = String::ZoneHandle(Symbols::New(thread, name));
  const FunctionType& signature = FunctionType::ZoneHandle(FunctionType::New());
  Function& function = Function::ZoneHandle(Function::New(
      signature, function_name, FunctionLayout::kRegularFunction, true, false,
      false, false, false, owner_class, TokenPosition::kNoSource));
  const Array& functions = Array::Handle(Array::New(1));
  functions.SetAt(0, function);
  {
    SafepointWriteRwLocker ml(thread, thread->isolate_group()->program_lock());
    owner_class.SetFunctions(functions);
  }
  lib.AddClass(owner_class);
  function.AttachCode(code);
  return function;
}

}  // namespace dart