Merge experimental/gc branch to the bleeding_edge.

src/v8globals.h

Index: src/v8globals.h
===================================================================
--- src/v8globals.h	(revision 9327)
+++ src/v8globals.h	(working copy)
@@ -79,18 +79,20 @@
     reinterpret_cast<Address>(V8_UINT64_C(0x1beefdad0beefdaf));
 const uint64_t kDebugZapValue = V8_UINT64_C(0xbadbaddbbadbaddb);
 const uint64_t kSlotsZapValue = V8_UINT64_C(0xbeefdeadbeefdeef);
+const uint64_t kFreeListZapValue = 0xfeed1eaffeed1eaf;
 #else
 const Address kZapValue = reinterpret_cast<Address>(0xdeadbeef);
 const Address kHandleZapValue = reinterpret_cast<Address>(0xbaddeaf);
 const Address kFromSpaceZapValue = reinterpret_cast<Address>(0xbeefdaf);
 const uint32_t kSlotsZapValue = 0xbeefdeef;
 const uint32_t kDebugZapValue = 0xbadbaddb;
+const uint32_t kFreeListZapValue = 0xfeed1eaf;
 #endif
 
 
-// Number of bits to represent the page size for paged spaces. The value of 13
-// gives 8K bytes per page.
-const int kPageSizeBits = 13;
+// Number of bits to represent the page size for paged spaces. The value of 20
+// gives 1Mb bytes per page.
+const int kPageSizeBits = 20;
 
 // On Intel architecture, cache line size is 64 bytes.
 // On ARM it may be less (32 bytes), but as far this constant is
@@ -131,6 +133,7 @@
 class FunctionEntry;
 class FunctionLiteral;
 class FunctionTemplateInfo;
+class MemoryChunk;
 class NumberDictionary;
 class StringDictionary;
 template <typename T> class Handle;
@@ -254,12 +257,6 @@
 };
 
 
-// Callback function on object slots, used for iterating heap object slots in
-// HeapObjects, global pointers to heap objects, etc. The callback allows the
-// callback function to change the value of the slot.
-typedef void (*ObjectSlotCallback)(HeapObject** pointer);
-
-
 // Callback function used for iterating objects in heap spaces,
 // for example, scanning heap objects.
 typedef int (*HeapObjectCallback)(HeapObject* obj);
@@ -316,6 +313,19 @@
 };
 
 
+// The Store Buffer (GC).
+typedef enum {
+  kStoreBufferFullEvent,
+  kStoreBufferStartScanningPagesEvent,
+  kStoreBufferScanningPageEvent
+} StoreBufferEvent;
+
+
+typedef void (*StoreBufferCallback)(Heap* heap,
+                                    MemoryChunk* page,
+                                    StoreBufferEvent event);
+
+
 // Type of properties.
 // Order of properties is significant.
 // Must fit in the BitField PropertyDetails::TypeField.