Implement argument definition test in the vm.

runtime/vm/symbols.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_SYMBOLS_H_
 #define VM_SYMBOLS_H_
 
 #include "vm/object.h"
 #include "vm/snapshot_ids.h"
 
 namespace dart {
 
 // Forward declarations.
 class Isolate;
 class ObjectPointerVisitor;
 
 #define PREDEFINED_SYMBOLS_LIST(V)                                             \
+  V(Empty, "")                                                                 \
   V(Dot, ".")                                                                  \
   V(Equals, "=")                                                               \
   V(IndexToken, "[]")                                                          \
   V(AssignIndexToken, "[]=")                                                   \
   V(TopLevel, "::")                                                            \
-  V(Empty, "")                                                                 \
+  V(DefaultLabel, ":L")                                                        \
   V(This, "this")                                                              \
   V(HasNext, "hasNext")                                                        \
   V(Next, "next")                                                              \
   V(Value, "value")                                                            \
   V(ExprTemp, ":expr_temp")                                                    \
   V(AnonymousClosure, "<anonymous closure>")                                   \
   V(PhaseParameter, ":phase")                                                  \
   V(TypeArgumentsParameter, ":type_arguments")                                 \
   V(AssertionError, "AssertionErrorImplementation")                            \
   V(TypeError, "TypeErrorImplementation")                                      \
   V(FallThroughError, "FallThroughErrorImplementation")                        \
   V(StaticResolutionException, "StaticResolutionException")                    \
   V(ThrowNew, "_throwNew")                                                     \
   V(ListLiteralFactoryClass, "_ListLiteralFactory")                            \
   V(ListLiteralFactory, "List.fromLiteral")                                    \
   V(MapLiteralFactoryClass, "_MapLiteralFactory")                              \
   V(MapLiteralFactory, "Map.fromLiteral")                                      \
   V(ImmutableMap, "ImmutableMap")                                              \
   V(ImmutableMapConstructor, "ImmutableMap._create")                           \
   V(StringBase, "StringBase")                                                  \
   V(Interpolate, "_interpolate")                                               \
   V(GetIterator, "iterator")                                                   \
   V(NoSuchMethod, "noSuchMethod")                                              \
+  V(SavedArgDescVarPrefix, ":saved_args_desc_var")                             \
+  V(SavedEntryContextVar, ":saved_entry_context_var")                          \
   V(SavedContextVar, ":saved_context_var")                                     \
   V(ExceptionVar, ":exception_var")                                            \
   V(StacktraceVar, ":stacktrace_var")                                          \
   V(ListLiteralElement, "list literal element")                                \
   V(ForInIter, ":for-in-iter")                                                 \
   V(Library, "library")                                                        \
   V(Import, "import")                                                          \
   V(Source, "source")                                                          \
   V(Resource, "resource")                                                      \
   V(Class, "Class")                                                            \
@@ skipping 103 matching lines @@
 
   // Helper functions to create a symbol given a string or set of characters.
   static RawString* New(const char* str);
   template<typename T>
   static RawString* New(const T* characters, intptr_t len);
   static RawString* New(const String& str);
   static RawString* New(const String& str,
                         intptr_t begin_index,
                         intptr_t length);
 
+  // Returns char* of predefined symbol.
+  static const char* Name(intptr_t symbol);
 
  private:
   enum {
     kInitialVMIsolateSymtabSize = ((Symbols::kMaxId + 15) & -16),
     kInitialSymtabSize = 256
   };
 
   // Add the string into the VM isolate symbol table.
   static void Add(const Array& symbol_table, const String& str);
 
@@ skipping 30 matching lines @@
   friend class SnapshotReader;
   friend class SnapshotWriter;
   friend class ApiMessageReader;
 
   DISALLOW_COPY_AND_ASSIGN(Symbols);
 };
 
 }  // namespace dart
 
 #endif  // VM_SYMBOLS_H_