Create read only handles for empty_array and sentinel objects

vm/unit_test.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_UNIT_TEST_H_
 #define VM_UNIT_TEST_H_
 
 #include "include/dart_api.h"
 
 #include "vm/ast.h"
@@ skipping 63 matching lines @@
 // Pass the name of test and the expected results as RawObject.
 #define CODEGEN_TEST_RUN(name, expected)                                       \
   static void CodeGenTestRun##name(const Function& function);                  \
   TEST_CASE(name) {                                                            \
     CodeGenTest __test__(""#name);                                             \
     CodeGenTestGenerate##name(&__test__);                                      \
     __test__.Compile();                                                        \
     CodeGenTestRun##name(__test__.function());                                 \
   }                                                                            \
   static void CodeGenTestRun##name(const Function& function) {                 \
-    const Array& args = Array::Handle(Object::empty_array());                  \
     Object& result = Object::Handle();                                         \
-    result = DartEntry::InvokeStatic(function, args);                          \
+    result = DartEntry::InvokeStatic(function, Object::empty_array());         \
     EXPECT(!result.IsError());                                                 \
     Instance& actual = Instance::Handle();                                     \
     actual ^= result.raw();                                                    \
     EXPECT(actual.Equals(Instance::Handle(expected)));                         \
   }
 
 
 // Pass the name of test, and use the generated function to call it
 // and evaluate its result.
 #define CODEGEN_TEST_RAW_RUN(name, function)                                   \
@@ skipping 16 matching lines @@
     CodeGenTest __test2__(""#name2);                                           \
     CodeGenTestGenerate##name2(&__test2__);                                    \
     __test2__.Compile();                                                       \
     /* Generate code for name1, providing function2 */                         \
     CodeGenTest __test1__(""#name1);                                           \
     CodeGenTestGenerate##name1(__test2__.function(), &__test1__);              \
     __test1__.Compile();                                                       \
     CodeGenTestRun##name1(__test1__.function());                               \
   }                                                                            \
   static void CodeGenTestRun##name1(const Function& function) {                \
-    const Array& args = Array::Handle(Object::empty_array());                  \
     Object& result = Object::Handle();                                         \
-    result = DartEntry::InvokeStatic(function, args);                          \
+    result = DartEntry::InvokeStatic(function, Object::empty_array());         \
     EXPECT(!result.IsError());                                                 \
     Instance& actual = Instance::Handle();                                     \
     actual ^= result.raw();                                                    \
     EXPECT(actual.Equals(Instance::Handle(expected)));                         \
   }
 
 
 inline Dart_Handle NewString(const char* str) {
   return Dart_NewStringFromCString(str);
 }
@@ skipping 171 matching lines @@
     } else {                                                                   \
       dart::Expect(__FILE__, __LINE__).Fail(                                   \
           "expected '%s' to be an error handle but found a valid handle.\n",   \
           #handle);                                                            \
     }                                                                          \
   } while (0)
 
 }  // namespace dart
 
 #endif  // VM_UNIT_TEST_H_