Introduce SharedFunctionInfo::Iterator and Script::Iterator.

src/objects.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 2497 matching lines @@
   template <class CompactionCallback>
   void Compact();
 
   inline Object* Get(int index) const;
   inline void Clear(int index);
   inline int Length() const;
 
   inline bool IsEmptySlot(int index) const;
   static Object* Empty() { return Smi::FromInt(0); }
 
+  class Iterator {
+   public:
+    explicit Iterator(Object* maybe_array) : list_(NULL) { Reset(maybe_array); }
+    void Reset(Object* maybe_array);
+
+    template <class T>
+    inline T* Next();
+
+   private:
+    int index_;
+    WeakFixedArray* list_;
+#ifdef DEBUG
+    int last_used_index_;
+    DisallowHeapAllocation no_gc_;
+#endif  // DEBUG
+    DISALLOW_COPY_AND_ASSIGN(Iterator);
+  };
+
   DECLARE_CAST(WeakFixedArray)
 
  private:
   static const int kLastUsedIndexIndex = 0;
   static const int kFirstIndex = 1;
 
   static Handle<WeakFixedArray> Allocate(
       Isolate* isolate, int size, Handle<WeakFixedArray> initialize_from);
 
   static void Set(Handle<WeakFixedArray> array, int index,
@@ skipping 3395 matching lines @@
   // Init line_ends array with code positions of line ends inside script source.
   static void InitLineEnds(Handle<Script> script);
 
   // Get the JS object wrapping the given script; create it if none exists.
   static Handle<JSObject> GetWrapper(Handle<Script> script);
 
   // Look through the list of existing shared function infos to find one
   // that matches the function literal.  Return empty handle if not found.
   MaybeHandle<SharedFunctionInfo> FindSharedFunctionInfo(FunctionLiteral* fun);
 
+  // Iterate over all script objects on the heap.
+  class Iterator {
+   public:
+    explicit Iterator(Isolate* isolate);
+    Script* Next();
+
+   private:
+    WeakFixedArray::Iterator iterator_;
+    DISALLOW_COPY_AND_ASSIGN(Iterator);
+  };
+
   // Dispatched behavior.
   DECLARE_PRINTER(Script)
   DECLARE_VERIFIER(Script)
 
   static const int kSourceOffset = HeapObject::kHeaderSize;
   static const int kNameOffset = kSourceOffset + kPointerSize;
   static const int kLineOffsetOffset = kNameOffset + kPointerSize;
   static const int kColumnOffsetOffset = kLineOffsetOffset + kPointerSize;
   static const int kContextOffset = kColumnOffsetOffset + kPointerSize;
   static const int kWrapperOffset = kContextOffset + kPointerSize;
@@ skipping 443 matching lines @@
   // Initialize a SharedFunctionInfo from a parsed function literal.
   static void InitFromFunctionLiteral(Handle<SharedFunctionInfo> shared_info,
                                       FunctionLiteral* lit);
 
   // Dispatched behavior.
   DECLARE_PRINTER(SharedFunctionInfo)
   DECLARE_VERIFIER(SharedFunctionInfo)
 
   void ResetForNewContext(int new_ic_age);
 
+  // Iterate over all shared function infos that are created from a script.
+  // That excludes shared function infos created for API functions and C++
+  // builtins.
+  class Iterator {
+   public:
+    explicit Iterator(Isolate* isolate);
+    SharedFunctionInfo* Next();
+
+   private:
+    bool NextScript();
+
+    Script::Iterator script_iterator_;
+    WeakFixedArray::Iterator sfi_iterator_;
+    DisallowHeapAllocation no_gc_;
+    DISALLOW_COPY_AND_ASSIGN(Iterator);
+  };
+
   DECLARE_CAST(SharedFunctionInfo)
 
   // Constants.
   static const int kDontAdaptArgumentsSentinel = -1;
 
   // Layout description.
   // Pointer fields.
   static const int kNameOffset = HeapObject::kHeaderSize;
   static const int kCodeOffset = kNameOffset + kPointerSize;
   static const int kOptimizedCodeMapOffset = kCodeOffset + kPointerSize;
@@ skipping 3797 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_