Revert "Upgrade V8 to 3.7.1"

This reverts commit 92f5a5d3caf01f382f90c235e9057590a5e76870.

V8 3.7.1 in debug mode on ia32 has a curious race-like bug where an fs.Stats
object is not fully formed until some time after it's created. This is easy
to demonstrate by running `make test-debug`.

V8 3.7.0 does not exhibit this behaviour so back we go.

Fixes #1981.

1 files changed, 15 insertions, 24 deletions

diff --git a/deps/v8/src/spaces.cc b/deps/v8/src/spaces.cc
index f467f710c..61b318118 100644
--- a/deps/v8/src/spaces.cc
+++ b/deps/v8/src/spaces.cc
@@ -95,6 +95,10 @@ void HeapObjectIterator::Initialize(PagedSpace* space,
   cur_end_ = end;
   page_mode_ = mode;
   size_func_ = size_f;
+
+#ifdef DEBUG
+  Verify();
+#endif
 }
 
 
@@ -119,6 +123,13 @@ bool HeapObjectIterator::AdvanceToNextPage() {
 }
 
 
+#ifdef DEBUG
+void HeapObjectIterator::Verify() {
+  // TODO(gc): We should do something here.
+}
+#endif
+
+
 // -----------------------------------------------------------------------------
 // CodeRange
 
@@ -1898,24 +1909,11 @@ intptr_t FreeList::SumFreeLists() {
 
 bool NewSpace::ReserveSpace(int bytes) {
   // We can't reliably unpack a partial snapshot that needs more new space
-  // space than the minimum NewSpace size.  The limit can be set lower than
-  // the end of new space either because there is more space on the next page
-  // or because we have lowered the limit in order to get periodic incremental
-  // marking.  The most reliable way to ensure that there is linear space is
-  // to do the allocation, then rewind the limit.
+  // space than the minimum NewSpace size.
   ASSERT(bytes <= InitialCapacity());
-  MaybeObject* maybe = AllocateRawInternal(bytes);
-  Object* object = NULL;
-  if (!maybe->ToObject(&object)) return false;
-  HeapObject* allocation = HeapObject::cast(object);
+  Address limit = allocation_info_.limit;
   Address top = allocation_info_.top;
-  if ((top - bytes) == allocation->address()) {
-    allocation_info_.top = allocation->address();
-    return true;
-  }
-  // There may be a borderline case here where the allocation succeeded, but
-  // the limit and top have moved on to a new page.  In that case we try again.
-  return ReserveSpace(bytes);
+  return limit - top >= bytes;
 }
 
 
@@ -2280,11 +2278,8 @@ HeapObject* LargeObjectIterator::Next() {
 // -----------------------------------------------------------------------------
 // LargeObjectSpace
 
-LargeObjectSpace::LargeObjectSpace(Heap* heap,
-                                   intptr_t max_capacity,
-                                   AllocationSpace id)
+LargeObjectSpace::LargeObjectSpace(Heap* heap, AllocationSpace id)
     : Space(heap, id, NOT_EXECUTABLE),  // Managed on a per-allocation basis
-      max_capacity_(max_capacity),
       first_page_(NULL),
       size_(0),
       page_count_(0),
@@ -2324,10 +2319,6 @@ MaybeObject* LargeObjectSpace::AllocateRaw(int object_size,
     return Failure::RetryAfterGC(identity());
   }
 
-  if (Size() + object_size > max_capacity_) {
-    return Failure::RetryAfterGC(identity());
-  }
-
   LargePage* page = heap()->isolate()->memory_allocator()->
       AllocateLargePage(object_size, executable, this);
   if (page == NULL) return Failure::RetryAfterGC(identity());