Add a flags field to RawObject so that we can tag objects with certain

vm/dart_api_impl_test.cc

 // 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.
 
 #include "include/dart_api.h"
 
 #include "vm/assert.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_api_state.h"
 #include "vm/unit_test.h"
@@ skipping 1064 matching lines @@
                                0,
                                NULL);
     EXPECT_VALID(result);
     DARTSCOPE_NOCHECKS(Isolate::Current());
     Instance& obj = Instance::Handle();
     obj ^= Api::UnwrapHandle(result);
     const Class& cls = Class::Handle(obj.clazz());
     // We expect the newly created "NativeFields" object to have
     // 2 dart instance fields (fld1, fld2) and kNumNativeFields native fields.
     // Hence the size of an instance of "NativeFields" should be
-    // (kNumNativeFields + 2) * kWordSize + sizeof the header word.
+    // (kNumNativeFields + 2) * kWordSize + size of object header.
     // We check to make sure the instance size computed by the VM matches
     // our expectations.
-    EXPECT_EQ(Utils::RoundUp(((kNumNativeFields + 2) * kWordSize) + kWordSize,
+    intptr_t header_size = sizeof(RawObject);
+    EXPECT_EQ(Utils::RoundUp(((kNumNativeFields + 2) * kWordSize) + header_size,
                              kObjectAlignment),
               cls.instance_size());
   }
 }
 
 
 UNIT_TEST_CASE(InjectNativeFields2) {
   const char* kScriptChars =
       "class NativeFields extends NativeFieldsWrapper {\n"
       "  NativeFields(int i, int j) : fld1 = i, fld2 = j {}\n"
@@ skipping 62 matching lines @@
                                0,
                                NULL);
     EXPECT_VALID(result);
     DARTSCOPE_NOCHECKS(Isolate::Current());
     Instance& obj = Instance::Handle();
     obj ^= Api::UnwrapHandle(result);
     const Class& cls = Class::Handle(obj.clazz());
     // We expect the newly created "NativeFields" object to have
     // 2 dart instance fields (fld1, fld2) and kNumNativeFields native fields.
     // Hence the size of an instance of "NativeFields" should be
-    // (kNumNativeFields + 2) * kWordSize + sizeof the header word.
+    // (kNumNativeFields + 2) * kWordSize + size of object header.
     // We check to make sure the instance size computed by the VM matches
     // our expectations.
-    EXPECT_EQ(Utils::RoundUp(((kNumNativeFields + 2) * kWordSize) + kWordSize,
+    intptr_t header_size = sizeof(RawObject);
+    EXPECT_EQ(Utils::RoundUp(((kNumNativeFields + 2) * kWordSize) + header_size,
                              kObjectAlignment),
               cls.instance_size());
   }
 }
 
 
 UNIT_TEST_CASE(InjectNativeFields4) {
   const char* kScriptChars =
       "#import('dart:nativewrappers');"
       "class NativeFields extends NativeFieldWrapperClass2 {\n"
@@ skipping 1579 matching lines @@
 }
 
 
 UNIT_TEST_CASE(RunLoop_Exception) {
   RunLoopTest(true);
 }
 
 #endif  // TARGET_ARCH_IA32.
 
 }  // namespace dart