deps: update v8 to 4.4.63.9

Upgrade the bundled V8 and update code in src/ and lib/ to the new API.

Notable backwards incompatible changes are the removal of the smalloc
module and dropped support for CESU-8 decoding.  CESU-8 support can be
brought back if necessary by doing UTF-8 decoding ourselves.

This commit includes https://codereview.chromium.org/1192973004 to fix
a build error on python 2.6 systems.  The original commit log follows:

    Use optparse in js2c.py for python compatibility

    Without this change, V8 won't build on RHEL/CentOS 6 because the
    distro python is too old to know about the argparse module.

PR-URL: https://github.com/nodejs/io.js/pull/2022
Reviewed-By: Rod Vagg <rod@vagg.org>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>

1 files changed, 10 insertions, 9 deletions

diff --git a/deps/v8/src/heap/mark-compact-inl.h b/deps/v8/src/heap/mark-compact-inl.h
index 66b0a59cec..1ac9a5973a 100644
--- a/deps/v8/src/heap/mark-compact-inl.h
+++ b/deps/v8/src/heap/mark-compact-inl.h
@@ -15,8 +15,7 @@ namespace internal {
 
 MarkBit Marking::MarkBitFrom(Address addr) {
   MemoryChunk* p = MemoryChunk::FromAddress(addr);
-  return p->markbits()->MarkBitFromIndex(p->AddressToMarkbitIndex(addr),
-                                         p->ContainsOnlyData());
+  return p->markbits()->MarkBitFromIndex(p->AddressToMarkbitIndex(addr));
 }
 
 
@@ -24,15 +23,17 @@ void MarkCompactCollector::SetFlags(int flags) {
   reduce_memory_footprint_ = ((flags & Heap::kReduceMemoryFootprintMask) != 0);
   abort_incremental_marking_ =
       ((flags & Heap::kAbortIncrementalMarkingMask) != 0);
+  finalize_incremental_marking_ =
+      ((flags & Heap::kFinalizeIncrementalMarkingMask) != 0);
+  DCHECK(!finalize_incremental_marking_ || !abort_incremental_marking_);
 }
 
 
 void MarkCompactCollector::MarkObject(HeapObject* obj, MarkBit mark_bit) {
   DCHECK(Marking::MarkBitFrom(obj) == mark_bit);
-  if (!mark_bit.Get()) {
-    mark_bit.Set();
+  if (Marking::IsWhite(mark_bit)) {
+    Marking::WhiteToBlack(mark_bit);
     MemoryChunk::IncrementLiveBytesFromGC(obj->address(), obj->Size());
-    DCHECK(IsMarked(obj));
     DCHECK(obj->GetIsolate()->heap()->Contains(obj));
     marking_deque_.PushBlack(obj);
   }
@@ -40,9 +41,9 @@ void MarkCompactCollector::MarkObject(HeapObject* obj, MarkBit mark_bit) {
 
 
 void MarkCompactCollector::SetMark(HeapObject* obj, MarkBit mark_bit) {
-  DCHECK(!mark_bit.Get());
+  DCHECK(Marking::IsWhite(mark_bit));
   DCHECK(Marking::MarkBitFrom(obj) == mark_bit);
-  mark_bit.Set();
+  Marking::WhiteToBlack(mark_bit);
   MemoryChunk::IncrementLiveBytesFromGC(obj->address(), obj->Size());
 }
 
@@ -50,7 +51,7 @@ void MarkCompactCollector::SetMark(HeapObject* obj, MarkBit mark_bit) {
 bool MarkCompactCollector::IsMarked(Object* obj) {
   DCHECK(obj->IsHeapObject());
   HeapObject* heap_object = HeapObject::cast(obj);
-  return Marking::MarkBitFrom(heap_object).Get();
+  return Marking::IsBlackOrGrey(Marking::MarkBitFrom(heap_object));
 }
 
 
@@ -62,7 +63,7 @@ void MarkCompactCollector::RecordSlot(Object** anchor_slot, Object** slot,
       !ShouldSkipEvacuationSlotRecording(anchor_slot)) {
     if (!SlotsBuffer::AddTo(&slots_buffer_allocator_,
                             object_page->slots_buffer_address(), slot, mode)) {
-      EvictEvacuationCandidate(object_page);
+      EvictPopularEvacuationCandidate(object_page);
     }
   }
 }