Merge experimental/gc branch to the bleeding_edge.

src/objects-visiting.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 12 matching lines @@
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef V8_OBJECTS_VISITING_H_
 #define V8_OBJECTS_VISITING_H_
 
 #include "allocation.h"
 
-#if V8_TARGET_ARCH_IA32
-#include "ia32/assembler-ia32.h"
-#include "ia32/assembler-ia32-inl.h"
-#elif V8_TARGET_ARCH_X64
-#include "x64/assembler-x64.h"
-#include "x64/assembler-x64-inl.h"
-#elif V8_TARGET_ARCH_ARM
-#include "arm/assembler-arm.h"
-#include "arm/assembler-arm-inl.h"
-#elif V8_TARGET_ARCH_MIPS
-#include "mips/assembler-mips.h"
-#include "mips/assembler-mips-inl.h"
-#else
-#error Unsupported target architecture.
-#endif
-
 // This file provides base classes and auxiliary methods for defining
 // static object visitors used during GC.
 // Visiting HeapObject body with a normal ObjectVisitor requires performing
 // two switches on object's instance type to determine object size and layout
 // and one or more virtual method calls on visitor itself.
 // Static visitor is different: it provides a dispatch table which contains
 // pointers to specialized visit functions. Each map has the visitor_id
 // field which contains an index of specialized visitor to use.
 
 namespace v8 {
 namespace internal {
 
 
 // Base class for all static visitors.
 class StaticVisitorBase : public AllStatic {
  public:
   enum VisitorId {
     kVisitSeqAsciiString = 0,
     kVisitSeqTwoByteString,
     kVisitShortcutCandidate,
     kVisitByteArray,
+    kVisitFreeSpace,
     kVisitFixedArray,
     kVisitFixedDoubleArray,
     kVisitGlobalContext,
 
     // For data objects, JS objects and structs along with generic visitor which
     // can visit object of any size we provide visitors specialized by
     // object size in words.
     // Ids of specialized visitors are declared in a linear order (without
     // holes) starting from the id of visitor specialized for 2 words objects
     // (base visitor id) and ending with the id of generic visitor.
@@ skipping 149 matching lines @@
   }
 };
 
 
 template<typename StaticVisitor, typename BodyDescriptor, typename ReturnType>
 class FlexibleBodyVisitor : public BodyVisitorBase<StaticVisitor> {
  public:
   static inline ReturnType Visit(Map* map, HeapObject* object) {
     int object_size = BodyDescriptor::SizeOf(map, object);
     BodyVisitorBase<StaticVisitor>::IteratePointers(
-        map->heap(),
+        map->GetHeap(),
         object,
         BodyDescriptor::kStartOffset,
         object_size);
     return static_cast<ReturnType>(object_size);
   }
 
   template<int object_size>
   static inline ReturnType VisitSpecialized(Map* map, HeapObject* object) {
     ASSERT(BodyDescriptor::SizeOf(map, object) == object_size);
     BodyVisitorBase<StaticVisitor>::IteratePointers(
-        map->heap(),
+        map->GetHeap(),
         object,
         BodyDescriptor::kStartOffset,
         object_size);
     return static_cast<ReturnType>(object_size);
   }
 };
 
 
 template<typename StaticVisitor, typename BodyDescriptor, typename ReturnType>
 class FixedBodyVisitor : public BodyVisitorBase<StaticVisitor> {
  public:
   static inline ReturnType Visit(Map* map, HeapObject* object) {
     BodyVisitorBase<StaticVisitor>::IteratePointers(
-        map->heap(),
+        map->GetHeap(),
         object,
         BodyDescriptor::kStartOffset,
         BodyDescriptor::kEndOffset);
     return static_cast<ReturnType>(BodyDescriptor::kSize);
   }
 };
 
 
 // Base class for visitors used for a linear new space iteration.
 // IterateBody returns size of visited object.
 // Certain types of objects (i.e. Code objects) are not handled
 // by dispatch table of this visitor because they cannot appear
 // in the new space.
 //
 // This class is intended to be used in the following way:
 //
 //   class SomeVisitor : public StaticNewSpaceVisitor<SomeVisitor> {
 //     ...
 //   }
 //
 // This is an example of Curiously recurring template pattern
 // (see http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern).
 // We use CRTP to guarantee aggressive compile time optimizations (i.e.
 // inlining and specialization of StaticVisitor::VisitPointers methods).
 template<typename StaticVisitor>
 class StaticNewSpaceVisitor : public StaticVisitorBase {
  public:
-  static void Initialize() {
-    table_.Register(kVisitShortcutCandidate,
-                    &FixedBodyVisitor<StaticVisitor,
-                                      ConsString::BodyDescriptor,
-                                      int>::Visit);
-
-    table_.Register(kVisitConsString,
-                    &FixedBodyVisitor<StaticVisitor,
-                                      ConsString::BodyDescriptor,
-                                      int>::Visit);
-
-    table_.Register(kVisitSlicedString,
-                    &FixedBodyVisitor<StaticVisitor,
-                                      SlicedString::BodyDescriptor,
-                                      int>::Visit);
-
-    table_.Register(kVisitFixedArray,
-                    &FlexibleBodyVisitor<StaticVisitor,
-                                         FixedArray::BodyDescriptor,
-                                         int>::Visit);
-
-    table_.Register(kVisitFixedDoubleArray, &VisitFixedDoubleArray);
-
-    table_.Register(kVisitGlobalContext,
-                    &FixedBodyVisitor<StaticVisitor,
-                                      Context::ScavengeBodyDescriptor,
-                                      int>::Visit);
-
-    table_.Register(kVisitByteArray, &VisitByteArray);
-
-    table_.Register(kVisitSharedFunctionInfo,
-                    &FixedBodyVisitor<StaticVisitor,
-                                      SharedFunctionInfo::BodyDescriptor,
-                                      int>::Visit);
-
-    table_.Register(kVisitJSWeakMap, &VisitJSObject);
-
-    table_.Register(kVisitJSRegExp, &VisitJSObject);
-
-    table_.Register(kVisitSeqAsciiString, &VisitSeqAsciiString);
-
-    table_.Register(kVisitSeqTwoByteString, &VisitSeqTwoByteString);
-
-    table_.Register(kVisitJSFunction,
-                    &JSObjectVisitor::
-                        template VisitSpecialized<JSFunction::kSize>);
-
-    table_.RegisterSpecializations<DataObjectVisitor,
-                                   kVisitDataObject,
-                                   kVisitDataObjectGeneric>();
-    table_.RegisterSpecializations<JSObjectVisitor,
-                                   kVisitJSObject,
-                                   kVisitJSObjectGeneric>();
-    table_.RegisterSpecializations<StructVisitor,
-                                   kVisitStruct,
-                                   kVisitStructGeneric>();
-  }
+  static void Initialize();
 
   static inline int IterateBody(Map* map, HeapObject* obj) {
     return table_.GetVisitor(map)(map, obj);
   }
 
   static inline void VisitPointers(Heap* heap, Object** start, Object** end) {
     for (Object** p = start; p < end; p++) StaticVisitor::VisitPointer(heap, p);
   }
 
  private:
@@ skipping 13 matching lines @@
   static inline int VisitSeqAsciiString(Map* map, HeapObject* object) {
     return SeqAsciiString::cast(object)->
         SeqAsciiStringSize(map->instance_type());
   }
 
   static inline int VisitSeqTwoByteString(Map* map, HeapObject* object) {
     return SeqTwoByteString::cast(object)->
         SeqTwoByteStringSize(map->instance_type());
   }
 
+  static inline int VisitFreeSpace(Map* map, HeapObject* object) {
+    return FreeSpace::cast(object)->Size();
+  }
+
   class DataObjectVisitor {
    public:
     template<int object_size>
     static inline int VisitSpecialized(Map* map, HeapObject* object) {
       return object_size;
     }
 
     static inline int Visit(Map* map, HeapObject* object) {
       return map->instance_size();
     }
@@ skipping 11 matching lines @@
 
   static VisitorDispatchTable<Callback> table_;
 };
 
 
 template<typename StaticVisitor>
 VisitorDispatchTable<typename StaticNewSpaceVisitor<StaticVisitor>::Callback>
   StaticNewSpaceVisitor<StaticVisitor>::table_;
 
 
-void Code::CodeIterateBody(ObjectVisitor* v) {
-  int mode_mask = RelocInfo::kCodeTargetMask |
-                  RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT) |
-                  RelocInfo::ModeMask(RelocInfo::GLOBAL_PROPERTY_CELL) |
-                  RelocInfo::ModeMask(RelocInfo::EXTERNAL_REFERENCE) |
-                  RelocInfo::ModeMask(RelocInfo::JS_RETURN) |
-                  RelocInfo::ModeMask(RelocInfo::DEBUG_BREAK_SLOT) |
-                  RelocInfo::ModeMask(RelocInfo::RUNTIME_ENTRY);
-
-  // Use the relocation info pointer before it is visited by
-  // the heap compaction in the next statement.
-  RelocIterator it(this, mode_mask);
-
-  IteratePointer(v, kRelocationInfoOffset);
-  IteratePointer(v, kDeoptimizationDataOffset);
-
-  for (; !it.done(); it.next()) {
-    it.rinfo()->Visit(v);
-  }
-}
-
-
-template<typename StaticVisitor>
-void Code::CodeIterateBody(Heap* heap) {
-  int mode_mask = RelocInfo::kCodeTargetMask |
-                  RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT) |
-                  RelocInfo::ModeMask(RelocInfo::GLOBAL_PROPERTY_CELL) |
-                  RelocInfo::ModeMask(RelocInfo::EXTERNAL_REFERENCE) |
-                  RelocInfo::ModeMask(RelocInfo::JS_RETURN) |
-                  RelocInfo::ModeMask(RelocInfo::DEBUG_BREAK_SLOT) |
-                  RelocInfo::ModeMask(RelocInfo::RUNTIME_ENTRY);
-
-  // Use the relocation info pointer before it is visited by
-  // the heap compaction in the next statement.
-  RelocIterator it(this, mode_mask);
-
-  StaticVisitor::VisitPointer(
-      heap,
-      reinterpret_cast<Object**>(this->address() + kRelocationInfoOffset));
-  StaticVisitor::VisitPointer(
-      heap,
-      reinterpret_cast<Object**>(this->address() + kDeoptimizationDataOffset));
-
-  for (; !it.done(); it.next()) {
-    it.rinfo()->template Visit<StaticVisitor>(heap);
-  }
-}
-
-
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_VISITING_H_