Changes to pass the current isolate to all runtime and native calls.

runtime/vm/native_arguments.h

 // Copyright (c) 2011, 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 VM_NATIVE_ARGUMENTS_H_
 #define VM_NATIVE_ARGUMENTS_H_
 
 #include "vm/assert.h"
 
 namespace dart {
 
 // Forward declarations.
+class Isolate;
 class Object;
 class RawObject;
 
 
 // Class NativeArguments is used to access arguments passed in from
 // generated dart code to a runtime function or a dart library native
 // function. It is also used to set the return value if any at the slot
 // reserved for return values.
 // All runtime function/dart library native functions have the
 // following signature:
 //   void function_name(NativeArguments arguments);
 // Inside the function, arguments are accessed as follows:
 //   const Type& arg1 = Type::CheckedHandle(arguments.GetArgument(0));
 //   const Type& arg2 = Type::CheckedHandle(arguments.GetArgument(1));
 // The return value is set as follows:
 //   arguments.SetReturnValue(result);
 // NOTE: Since we pass this as a pass by value argument in the stubs we don't
 // have DISALLOW_COPY_AND_ASSIGN in the class definition and do not make it a
 // subclass of ValueObject.
 class NativeArguments {
  public:
+  Isolate* isolate() const { return isolate_; }
   int Count() const { return argc_; }
 
   RawObject* At(int index) const {
     ASSERT(index >=0 && index < argc_);
     return (*argv_)[-index];
   }
 
   void SetReturn(const Object& value) const;
 
+  static intptr_t isolate_offset() {
+    return OFFSET_OF(NativeArguments, isolate_);
+  }
   static intptr_t argc_offset() { return OFFSET_OF(NativeArguments, argc_); }
   static intptr_t argv_offset() { return OFFSET_OF(NativeArguments, argv_); }
   static intptr_t retval_offset() {
     return OFFSET_OF(NativeArguments, retval_);
   }
 
  private:
+  Isolate* isolate_;  // Current isolate pointer.
   int argc_;  // Number of arguments passed to the runtime call.
   RawObject*(*argv_)[];  // Pointer to an array of arguments to runtime call.
   RawObject** retval_;  // Pointer to the return value area.
 };
 
 }  // namespace dart
 
 #endif  // VM_NATIVE_ARGUMENTS_H_