Add Dart_GetNativeFieldsOfArgument to get all the native fields of a dart

runtime/vm/object.h

 // Copyright (c) 2012, 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_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 3969 matching lines @@
                     Error* bound_error) const;
 
   // Check whether this instance is identical to the argument according to the
   // specification of dare:core's identical().
   bool IsIdenticalTo(const Instance& other) const;
 
   bool IsValidNativeIndex(int index) const {
     return ((index >= 0) && (index < clazz()->ptr()->num_native_fields_));
   }
 
-  inline intptr_t GetNativeField(Isolate* isolate, int index) const;
+  inline intptr_t GetNativeField(int index) const;
+  inline void GetNativeFields(uint16_t num_fields,
+                              intptr_t* field_values) const;
+
+  uint16_t NumNativeFields() const {
+    return clazz()->ptr()->num_native_fields_;
+  }
+
   void SetNativeField(int index, intptr_t value) const;
 
   // Returns true if the instance is a closure object.
   bool IsClosure() const;
 
   // If the instance is a callable object, i.e. a closure or the instance of a
   // class implementing a 'call' method, return true and set the function
   // (if not NULL) to call and the context (if not NULL) to pass to the
   // function.
   bool IsCallable(Function* function, Context* context) const;
@@ skipping 2565 matching lines @@
   ASSERT(kWordSize != 0);
   raw_ptr()->value_ = Smi::New(value_in_bytes / kWordSize);
 }
 
 
 void Context::SetAt(intptr_t index, const Instance& value) const {
   StorePointer(InstanceAddr(index), value.raw());
 }
 
 
-intptr_t Instance::GetNativeField(Isolate* isolate, int index) const {
+intptr_t Instance::GetNativeField(int index) const {
   ASSERT(IsValidNativeIndex(index));
   NoGCScope no_gc;
   RawTypedData* native_fields =
       reinterpret_cast<RawTypedData*>(*NativeFieldsAddr());
   if (native_fields == TypedData::null()) {
     return 0;
   }
   return reinterpret_cast<intptr_t*>(native_fields->ptr()->data_)[index];
 }
 
 
+void Instance::GetNativeFields(uint16_t num_fields,
+                               intptr_t* field_values) const {
+  NoGCScope no_gc;
+  ASSERT(num_fields == NumNativeFields());
+  ASSERT(field_values != NULL);
+  RawTypedData* native_fields =
+      reinterpret_cast<RawTypedData*>(*NativeFieldsAddr());
+  if (native_fields == TypedData::null()) {
+    for (intptr_t i = 0; i < num_fields; i++) {
+      field_values[i] = 0;
+    }
+  }
+  intptr_t* fields = reinterpret_cast<intptr_t*>(native_fields->ptr()->data_);
+  for (intptr_t i = 0; i < num_fields; i++) {
+    field_values[i] = fields[i];
+  }
+}
+
+
 bool String::Equals(const String& str) const {
   if (raw() == str.raw()) {
     return true;  // Both handles point to the same raw instance.
   }
   if (str.IsNull()) {
     return false;
   }
   return Equals(str, 0, str.Length());
 }
 
@@ skipping 32 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_