Fix uninitialized members.

Make sure that the DummyScope top level scope used for pre-parsing have all members initialized. The type of this scope is set to global scope as it is a top level scope. Also ensure that the "naked" Scope constructor can only be used by sub-classes of Scope.

The bug of missing initiaalization of members in the DummyScope was found by Valgrind.
Review URL: http://codereview.chromium.org/173052

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2719 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/scopes.cc

@@ -108,14 +108,31 @@ Variable* VariableMap::Lookup(Handle<String> name) {
 
 
 // Dummy constructor
-Scope::Scope()
-  : inner_scopes_(0),
+Scope::Scope(Type type)
+  : outer_scope_(NULL),
+    inner_scopes_(0),
+    type_(type),
+    scope_name_(Factory::empty_symbol()),
     variables_(false),
     temps_(0),
     params_(0),
     dynamics_(NULL),
     unresolved_(0),
-    decls_(0) {
+    decls_(0),
+    receiver_(NULL),
+    function_(NULL),
+    arguments_(NULL),
+    arguments_shadow_(NULL),
+    illegal_redecl_(NULL),
+    scope_inside_with_(false),
+    scope_contains_with_(false),
+    scope_calls_eval_(false),
+    outer_scope_calls_eval_(false),
+    inner_scope_calls_eval_(false),
+    outer_scope_is_eval_scope_(false),
+    force_eager_compilation_(false),
+    num_stack_slots_(0),
+    num_heap_slots_(0) {
 }
 
 

src/scopes.h

@@ -93,7 +93,6 @@ class Scope: public ZoneObject {
     GLOBAL_SCOPE    // the top-level scope for a program or a top-level eval
   };
 
-  Scope();
   Scope(Scope* outer_scope, Type type);
 
   virtual ~Scope() { }
@@ -130,7 +129,7 @@ class Scope: public ZoneObject {
   Variable* DeclareGlobal(Handle<String> name);
 
   // Add a parameter to the parameter list. The parameter must have been
-  // declared via Declare. The same parameter may occur more then once in
+  // declared via Declare. The same parameter may occur more than once in
   // the parameter list; they must be added in source order, from left to
   // right.
   void AddParameter(Variable* var);
@@ -286,6 +285,8 @@ class Scope: public ZoneObject {
  protected:
   friend class ParserFactory;
 
+  explicit Scope(Type type);
+
   // Scope tree.
   Scope* outer_scope_;  // the immediately enclosing outer scope, or NULL
   ZoneList<Scope*> inner_scopes_;  // the immediately enclosed inner scopes
@@ -375,7 +376,7 @@ class Scope: public ZoneObject {
 
 class DummyScope : public Scope {
  public:
-  DummyScope() {
+   DummyScope() : Scope(GLOBAL_SCOPE) {
     outer_scope_ = this;
   }