diff --git a/deps/v8/SConstruct b/deps/v8/SConstruct
index 5483663fd6..0b038039ef 100644
--- a/deps/v8/SConstruct
+++ b/deps/v8/SConstruct
@@ -267,6 +267,7 @@ V8_EXTRA_FLAGS = {
   'gcc': {
     'all': {
       'WARNINGFLAGS': ['-Wall',
+                       '-Werror',
                        '-W',
                        '-Wno-unused-parameter',
                        '-Wnon-virtual-dtor']
diff --git a/deps/v8/include/v8.h b/deps/v8/include/v8.h
index 13f8191703..69b93c69c0 100644
--- a/deps/v8/include/v8.h
+++ b/deps/v8/include/v8.h
@@ -2441,6 +2441,16 @@ class V8EXPORT V8 {
    */
   static void TerminateExecution();
 
+  /**
+   * Is V8 terminating JavaScript execution.
+   *
+   * Returns true if JavaScript execution is currently terminating
+   * because of a call to TerminateExecution.  In that case there are
+   * still JavaScript frames on the stack and the termination
+   * exception is still active.
+   */
+  static bool IsExecutionTerminating();
+
   /**
    * Releases any resources used by v8 and stops any utility threads
    * that may be running.  Note that disposing v8 is permanent, it
@@ -2473,6 +2483,12 @@ class V8EXPORT V8 {
    */
   static void LowMemoryNotification();
 
+  /**
+   * Optional notification that a context has been disposed. V8 uses
+   * these notifications to guide the garbage collection heuristic.
+   */
+  static void ContextDisposedNotification();
+
  private:
   V8();
 
diff --git a/deps/v8/src/api.cc b/deps/v8/src/api.cc
index dbb3d8b741..22d2f4bc78 100644
--- a/deps/v8/src/api.cc
+++ b/deps/v8/src/api.cc
@@ -438,7 +438,6 @@ bool V8::IsGlobalWeak(i::Object** obj) {
 void V8::DisposeGlobal(i::Object** obj) {
   LOG_API("DisposeGlobal");
   if (!i::V8::IsRunning()) return;
-  if ((*obj)->IsGlobalContext()) i::Heap::NotifyContextDisposed();
   i::GlobalHandles::Destroy(obj);
 }
 
@@ -2821,6 +2820,12 @@ void v8::V8::LowMemoryNotification() {
 }
 
 
+void v8::V8::ContextDisposedNotification() {
+  if (!i::V8::IsRunning()) return;
+  i::Heap::NotifyContextDisposed();
+}
+
+
 const char* v8::V8::GetVersion() {
   static v8::internal::EmbeddedVector<char, 128> buffer;
   v8::internal::Version::GetString(buffer);
@@ -2852,13 +2857,6 @@ Persistent<Context> v8::Context::New(
   i::Handle<i::Context> env;
   {
     ENTER_V8;
-#if defined(ANDROID)
-    // On mobile device, full GC is expensive, leave it to the system to
-    // decide when should make a full GC.
-#else
-    // Give the heap a chance to cleanup if we've disposed contexts.
-    i::Heap::CollectAllGarbageIfContextDisposed();
-#endif
     v8::Handle<ObjectTemplate> proxy_template = global_template;
     i::Handle<i::FunctionTemplateInfo> proxy_constructor;
     i::Handle<i::FunctionTemplateInfo> global_constructor;
@@ -3561,6 +3559,15 @@ void V8::TerminateExecution() {
 }
 
 
+bool V8::IsExecutionTerminating() {
+  if (!i::V8::IsRunning()) return false;
+  if (i::Top::has_scheduled_exception()) {
+    return i::Top::scheduled_exception() == i::Heap::termination_exception();
+  }
+  return false;
+}
+
+
 String::Utf8Value::Utf8Value(v8::Handle<v8::Value> obj) {
   EnsureInitialized("v8::String::Utf8Value::Utf8Value()");
   if (obj.IsEmpty()) {
diff --git a/deps/v8/src/arm/codegen-arm.cc b/deps/v8/src/arm/codegen-arm.cc
index 95c50f262f..6644d02487 100644
--- a/deps/v8/src/arm/codegen-arm.cc
+++ b/deps/v8/src/arm/codegen-arm.cc
@@ -35,7 +35,7 @@
 #include "register-allocator-inl.h"
 #include "runtime.h"
 #include "scopes.h"
-
+#include "virtual-frame-inl.h"
 
 namespace v8 {
 namespace internal {
@@ -133,9 +133,6 @@ CodeGenerator::CodeGenerator(MacroAssembler* masm)
 }
 
 
-Scope* CodeGenerator::scope() { return info_->function()->scope(); }
-
-
 // Calling conventions:
 // fp: caller's frame pointer
 // sp: stack pointer
diff --git a/deps/v8/src/arm/codegen-arm.h b/deps/v8/src/arm/codegen-arm.h
index 1a2e5525a2..2bc482ed5e 100644
--- a/deps/v8/src/arm/codegen-arm.h
+++ b/deps/v8/src/arm/codegen-arm.h
@@ -203,7 +203,7 @@ class CodeGenerator: public AstVisitor {
 
   // Accessors
   inline bool is_eval();
-  Scope* scope();
+  inline Scope* scope();
 
   // Generating deferred code.
   void ProcessDeferred();
diff --git a/deps/v8/src/arm/fast-codegen-arm.cc b/deps/v8/src/arm/fast-codegen-arm.cc
index aa7128fcae..0d322d1a3e 100644
--- a/deps/v8/src/arm/fast-codegen-arm.cc
+++ b/deps/v8/src/arm/fast-codegen-arm.cc
@@ -29,6 +29,7 @@
 
 #include "codegen-inl.h"
 #include "fast-codegen.h"
+#include "scopes.h"
 
 namespace v8 {
 namespace internal {
diff --git a/deps/v8/src/arm/full-codegen-arm.cc b/deps/v8/src/arm/full-codegen-arm.cc
index 4896373802..c37e29f63c 100644
--- a/deps/v8/src/arm/full-codegen-arm.cc
+++ b/deps/v8/src/arm/full-codegen-arm.cc
@@ -32,6 +32,7 @@
 #include "debug.h"
 #include "full-codegen.h"
 #include "parser.h"
+#include "scopes.h"
 
 namespace v8 {
 namespace internal {
diff --git a/deps/v8/src/arm/jump-target-arm.cc b/deps/v8/src/arm/jump-target-arm.cc
index 3315f8381c..a84060d570 100644
--- a/deps/v8/src/arm/jump-target-arm.cc
+++ b/deps/v8/src/arm/jump-target-arm.cc
@@ -30,6 +30,7 @@
 #include "codegen-inl.h"
 #include "jump-target-inl.h"
 #include "register-allocator-inl.h"
+#include "virtual-frame-inl.h"
 
 namespace v8 {
 namespace internal {
diff --git a/deps/v8/src/arm/virtual-frame-arm.cc b/deps/v8/src/arm/virtual-frame-arm.cc
index 0f7c597120..6e1a47fb6e 100644
--- a/deps/v8/src/arm/virtual-frame-arm.cc
+++ b/deps/v8/src/arm/virtual-frame-arm.cc
@@ -30,6 +30,7 @@
 #include "codegen-inl.h"
 #include "register-allocator-inl.h"
 #include "scopes.h"
+#include "virtual-frame-inl.h"
 
 namespace v8 {
 namespace internal {
diff --git a/deps/v8/src/arm/virtual-frame-arm.h b/deps/v8/src/arm/virtual-frame-arm.h
index a45cfc6e16..f69bddf55f 100644
--- a/deps/v8/src/arm/virtual-frame-arm.h
+++ b/deps/v8/src/arm/virtual-frame-arm.h
@@ -62,7 +62,7 @@ class VirtualFrame : public ZoneObject {
   VirtualFrame();
 
   // Construct a virtual frame as a clone of an existing one.
-  explicit VirtualFrame(VirtualFrame* original);
+  explicit inline VirtualFrame(VirtualFrame* original);
 
   CodeGenerator* cgen() { return CodeGeneratorScope::Current(); }
   MacroAssembler* masm() { return cgen()->masm(); }
@@ -344,9 +344,9 @@ class VirtualFrame : public ZoneObject {
   void EmitPushMultiple(int count, int src_regs);
 
   // Push an element on the virtual frame.
-  void Push(Register reg, NumberInfo::Type info = NumberInfo::kUnknown);
-  void Push(Handle<Object> value);
-  void Push(Smi* value) { Push(Handle<Object>(value)); }
+  inline void Push(Register reg, NumberInfo::Type info = NumberInfo::kUnknown);
+  inline void Push(Handle<Object> value);
+  inline void Push(Smi* value);
 
   // Pushing a result invalidates it (its contents become owned by the frame).
   void Push(Result* result) {
@@ -362,7 +362,7 @@ class VirtualFrame : public ZoneObject {
   // Nip removes zero or more elements from immediately below the top
   // of the frame, leaving the previous top-of-frame value on top of
   // the frame.  Nip(k) is equivalent to x = Pop(), Drop(k), Push(x).
-  void Nip(int num_dropped);
+  inline void Nip(int num_dropped);
 
  private:
   static const int kLocal0Offset = JavaScriptFrameConstants::kLocal0Offset;
@@ -457,7 +457,7 @@ class VirtualFrame : public ZoneObject {
 
   // Push a copy of a frame slot (typically a local or parameter) on top of
   // the frame.
-  void PushFrameSlotAt(int index);
+  inline void PushFrameSlotAt(int index);
 
   // Push a the value of a frame slot (typically a local or parameter) on
   // top of the frame and invalidate the slot.
@@ -500,7 +500,7 @@ class VirtualFrame : public ZoneObject {
   // Register counts are correctly updated.
   int InvalidateFrameSlotAt(int index);
 
-  bool Equals(VirtualFrame* other);
+  inline bool Equals(VirtualFrame* other);
 
   // Classes that need raw access to the elements_ array.
   friend class DeferredCode;
diff --git a/deps/v8/src/ast.h b/deps/v8/src/ast.h
index 927a9f5035..f2171cc3ef 100644
--- a/deps/v8/src/ast.h
+++ b/deps/v8/src/ast.h
@@ -931,10 +931,6 @@ class VariableProxy: public Expression {
     return var()->is_global() || var()->rewrite()->IsLeaf();
   }
 
-  // Reading from a mutable variable is a side effect, but 'this' is
-  // immutable.
-  virtual bool IsTrivial() { return is_this(); }
-
   bool IsVariable(Handle<String> n) {
     return !is_this() && name().is_identical_to(n);
   }
diff --git a/deps/v8/src/codegen-inl.h b/deps/v8/src/codegen-inl.h
index da8cbf7034..6534e7fd63 100644
--- a/deps/v8/src/codegen-inl.h
+++ b/deps/v8/src/codegen-inl.h
@@ -50,8 +50,11 @@ namespace v8 {
 namespace internal {
 
 Handle<Script> CodeGenerator::script() { return info_->script(); }
+
 bool CodeGenerator::is_eval() { return info_->is_eval(); }
 
+Scope* CodeGenerator::scope() { return info_->function()->scope(); }
+
 } }  // namespace v8::internal
 
 #endif  // V8_CODEGEN_INL_H_
diff --git a/deps/v8/src/codegen.cc b/deps/v8/src/codegen.cc
index dbd1100d9e..5e25f69099 100644
--- a/deps/v8/src/codegen.cc
+++ b/deps/v8/src/codegen.cc
@@ -39,6 +39,7 @@
 #include "runtime.h"
 #include "scopeinfo.h"
 #include "stub-cache.h"
+#include "virtual-frame-inl.h"
 
 namespace v8 {
 namespace internal {
diff --git a/deps/v8/src/full-codegen.cc b/deps/v8/src/full-codegen.cc
index 63714392cd..6e9a3ff00e 100644
--- a/deps/v8/src/full-codegen.cc
+++ b/deps/v8/src/full-codegen.cc
@@ -30,6 +30,7 @@
 #include "codegen-inl.h"
 #include "compiler.h"
 #include "full-codegen.h"
+#include "scopes.h"
 #include "stub-cache.h"
 #include "debug.h"
 #include "liveedit.h"
diff --git a/deps/v8/src/heap.cc b/deps/v8/src/heap.cc
index cfb786ac7a..9ff57d251e 100644
--- a/deps/v8/src/heap.cc
+++ b/deps/v8/src/heap.cc
@@ -115,7 +115,7 @@ int Heap::gc_count_ = 0;
 
 int Heap::always_allocate_scope_depth_ = 0;
 int Heap::linear_allocation_scope_depth_ = 0;
-bool Heap::context_disposed_pending_ = false;
+int Heap::contexts_disposed_ = 0;
 
 #ifdef DEBUG
 bool Heap::allocation_allowed_ = true;
@@ -371,21 +371,8 @@ void Heap::CollectAllGarbage(bool force_compaction) {
 }
 
 
-void Heap::CollectAllGarbageIfContextDisposed() {
-  // If the garbage collector interface is exposed through the global
-  // gc() function, we avoid being clever about forcing GCs when
-  // contexts are disposed and leave it to the embedder to make
-  // informed decisions about when to force a collection.
-  if (!FLAG_expose_gc && context_disposed_pending_) {
-    HistogramTimerScope scope(&Counters::gc_context);
-    CollectAllGarbage(false);
-  }
-  context_disposed_pending_ = false;
-}
-
-
 void Heap::NotifyContextDisposed() {
-  context_disposed_pending_ = true;
+  contexts_disposed_++;
 }
 
 
@@ -620,7 +607,8 @@ void Heap::MarkCompact(GCTracer* tracer) {
   Shrink();
 
   Counters::objs_since_last_full.Set(0);
-  context_disposed_pending_ = false;
+
+  contexts_disposed_ = 0;
 }
 
 
@@ -3072,6 +3060,13 @@ bool Heap::IdleNotification() {
   static int number_idle_notifications = 0;
   static int last_gc_count = gc_count_;
 
+  if (!FLAG_expose_gc && (contexts_disposed_ > 0)) {
+    HistogramTimerScope scope(&Counters::gc_context);
+    CollectAllGarbage(false);
+    ASSERT(contexts_disposed_ == 0);
+    return false;
+  }
+
   bool finished = false;
 
   if (last_gc_count == gc_count_) {
diff --git a/deps/v8/src/heap.h b/deps/v8/src/heap.h
index 3f34df72b1..50846499d4 100644
--- a/deps/v8/src/heap.h
+++ b/deps/v8/src/heap.h
@@ -632,10 +632,6 @@ class Heap : public AllStatic {
   // parameter is true.
   static void CollectAllGarbage(bool force_compaction);
 
-  // Performs a full garbage collection if a context has been disposed
-  // since the last time the check was performed.
-  static void CollectAllGarbageIfContextDisposed();
-
   // Notify the heap that a context has been disposed.
   static void NotifyContextDisposed();
 
@@ -908,7 +904,9 @@ class Heap : public AllStatic {
 
   static int always_allocate_scope_depth_;
   static int linear_allocation_scope_depth_;
-  static bool context_disposed_pending_;
+
+  // For keeping track of context disposals.
+  static int contexts_disposed_;
 
 #if defined(V8_TARGET_ARCH_X64)
   static const int kMaxObjectSizeInNewSpace = 512*KB;
diff --git a/deps/v8/src/ia32/codegen-ia32.cc b/deps/v8/src/ia32/codegen-ia32.cc
index 85d8ed9bc0..bd2a994083 100644
--- a/deps/v8/src/ia32/codegen-ia32.cc
+++ b/deps/v8/src/ia32/codegen-ia32.cc
@@ -39,6 +39,7 @@
 #include "register-allocator-inl.h"
 #include "runtime.h"
 #include "scopes.h"
+#include "virtual-frame-inl.h"
 
 namespace v8 {
 namespace internal {
@@ -116,9 +117,6 @@ CodeGenerator::CodeGenerator(MacroAssembler* masm)
 }
 
 
-Scope* CodeGenerator::scope() { return info_->function()->scope(); }
-
-
 // Calling conventions:
 // ebp: caller's frame pointer
 // esp: stack pointer
diff --git a/deps/v8/src/ia32/codegen-ia32.h b/deps/v8/src/ia32/codegen-ia32.h
index 99dc340b64..0fa6919774 100644
--- a/deps/v8/src/ia32/codegen-ia32.h
+++ b/deps/v8/src/ia32/codegen-ia32.h
@@ -343,7 +343,7 @@ class CodeGenerator: public AstVisitor {
 
   // Accessors
   inline bool is_eval();
-  Scope* scope();
+  inline Scope* scope();
 
   // Generating deferred code.
   void ProcessDeferred();
diff --git a/deps/v8/src/ia32/full-codegen-ia32.cc b/deps/v8/src/ia32/full-codegen-ia32.cc
index 2394bed624..e42fcc8624 100644
--- a/deps/v8/src/ia32/full-codegen-ia32.cc
+++ b/deps/v8/src/ia32/full-codegen-ia32.cc
@@ -32,6 +32,7 @@
 #include "debug.h"
 #include "full-codegen.h"
 #include "parser.h"
+#include "scopes.h"
 
 namespace v8 {
 namespace internal {
diff --git a/deps/v8/src/ia32/jump-target-ia32.cc b/deps/v8/src/ia32/jump-target-ia32.cc
index c3f2bc1a4c..cba6508031 100644
--- a/deps/v8/src/ia32/jump-target-ia32.cc
+++ b/deps/v8/src/ia32/jump-target-ia32.cc
@@ -30,6 +30,7 @@
 #include "codegen-inl.h"
 #include "jump-target-inl.h"
 #include "register-allocator-inl.h"
+#include "virtual-frame-inl.h"
 
 namespace v8 {
 namespace internal {
diff --git a/deps/v8/src/ia32/register-allocator-ia32.cc b/deps/v8/src/ia32/register-allocator-ia32.cc
index 0bad87d082..20539bff95 100644
--- a/deps/v8/src/ia32/register-allocator-ia32.cc
+++ b/deps/v8/src/ia32/register-allocator-ia32.cc
@@ -29,6 +29,7 @@
 
 #include "codegen-inl.h"
 #include "register-allocator-inl.h"
+#include "virtual-frame-inl.h"
 
 namespace v8 {
 namespace internal {
diff --git a/deps/v8/src/ia32/stub-cache-ia32.cc b/deps/v8/src/ia32/stub-cache-ia32.cc
index 5729d9d742..ade324b92f 100644
--- a/deps/v8/src/ia32/stub-cache-ia32.cc
+++ b/deps/v8/src/ia32/stub-cache-ia32.cc
@@ -479,17 +479,14 @@ class LoadInterceptorCompiler BASE_EMBEDDED {
 // Holds information about possible function call optimizations.
 class CallOptimization BASE_EMBEDDED {
  public:
-  explicit CallOptimization(LookupResult* lookup)
-    : constant_function_(NULL),
-      is_simple_api_call_(false),
-      expected_receiver_type_(NULL),
-      api_call_info_(NULL) {
-    if (!lookup->IsProperty() || !lookup->IsCacheable()) return;
-
-    // We only optimize constant function calls.
-    if (lookup->type() != CONSTANT_FUNCTION) return;
-
-    Initialize(lookup->GetConstantFunction());
+  explicit CallOptimization(LookupResult* lookup) {
+    if (!lookup->IsProperty() || !lookup->IsCacheable() ||
+        lookup->type() != CONSTANT_FUNCTION) {
+      Initialize(NULL);
+    } else {
+      // We only optimize constant function calls.
+      Initialize(lookup->GetConstantFunction());
+    }
   }
 
   explicit CallOptimization(JSFunction* function) {
@@ -537,11 +534,14 @@ class CallOptimization BASE_EMBEDDED {
 
  private:
   void Initialize(JSFunction* function) {
-    if (!function->is_compiled()) return;
-
-    constant_function_ = function;
+    constant_function_ = NULL;
     is_simple_api_call_ = false;
+    expected_receiver_type_ = NULL;
+    api_call_info_ = NULL;
 
+    if (function == NULL || !function->is_compiled()) return;
+
+    constant_function_ = function;
     AnalyzePossibleApiFunction(function);
   }
 
@@ -1223,7 +1223,7 @@ Object* CallStubCompiler::CompileCallConstant(Object* object,
   //  -- ...
   //  -- esp[(argc + 1) * 4] : receiver
   // -----------------------------------
-  Label miss;
+  Label miss_in_smi_check;
 
   // Get the receiver from the stack.
   const int argc = arguments().immediate();
@@ -1232,7 +1232,7 @@ Object* CallStubCompiler::CompileCallConstant(Object* object,
   // Check that the receiver isn't a smi.
   if (check != NUMBER_CHECK) {
     __ test(edx, Immediate(kSmiTagMask));
-    __ j(zero, &miss, not_taken);
+    __ j(zero, &miss_in_smi_check, not_taken);
   }
 
   // Make sure that it's okay not to patch the on stack receiver
@@ -1241,6 +1241,7 @@ Object* CallStubCompiler::CompileCallConstant(Object* object,
 
   CallOptimization optimization(function);
   int depth = kInvalidProtoDepth;
+  Label miss;
 
   switch (check) {
     case RECEIVER_MAP_CHECK:
@@ -1359,6 +1360,7 @@ Object* CallStubCompiler::CompileCallConstant(Object* object,
   if (depth != kInvalidProtoDepth) {
     FreeSpaceForFastApiCall(masm(), eax);
   }
+  __ bind(&miss_in_smi_check);
   Handle<Code> ic = ComputeCallMiss(arguments().immediate());
   __ jmp(ic, RelocInfo::CODE_TARGET);
 
diff --git a/deps/v8/src/ia32/virtual-frame-ia32.cc b/deps/v8/src/ia32/virtual-frame-ia32.cc
index 7df028e946..75ff670b6d 100644
--- a/deps/v8/src/ia32/virtual-frame-ia32.cc
+++ b/deps/v8/src/ia32/virtual-frame-ia32.cc
@@ -30,6 +30,7 @@
 #include "codegen-inl.h"
 #include "register-allocator-inl.h"
 #include "scopes.h"
+#include "virtual-frame-inl.h"
 
 namespace v8 {
 namespace internal {
diff --git a/deps/v8/src/ia32/virtual-frame-ia32.h b/deps/v8/src/ia32/virtual-frame-ia32.h
index 7be593cc58..d4cc1417c9 100644
--- a/deps/v8/src/ia32/virtual-frame-ia32.h
+++ b/deps/v8/src/ia32/virtual-frame-ia32.h
@@ -76,7 +76,7 @@ class VirtualFrame: public ZoneObject {
   VirtualFrame();
 
   // Construct a virtual frame as a clone of an existing one.
-  explicit VirtualFrame(VirtualFrame* original);
+  explicit inline VirtualFrame(VirtualFrame* original);
 
   CodeGenerator* cgen() { return CodeGeneratorScope::Current(); }
 
@@ -395,11 +395,9 @@ class VirtualFrame: public ZoneObject {
                 NumberInfo::Type info = NumberInfo::kUnknown);
 
   // Push an element on the virtual frame.
-  void Push(Register reg, NumberInfo::Type info = NumberInfo::kUnknown);
-  void Push(Handle<Object> value);
-  void Push(Smi* value) {
-    Push(Handle<Object> (value));
-  }
+  inline void Push(Register reg, NumberInfo::Type info = NumberInfo::kUnknown);
+  inline void Push(Handle<Object> value);
+  inline void Push(Smi* value);
 
   // Pushing a result invalidates it (its contents become owned by the
   // frame).
@@ -422,7 +420,7 @@ class VirtualFrame: public ZoneObject {
   // Nip removes zero or more elements from immediately below the top
   // of the frame, leaving the previous top-of-frame value on top of
   // the frame.  Nip(k) is equivalent to x = Pop(), Drop(k), Push(x).
-  void Nip(int num_dropped);
+  inline void Nip(int num_dropped);
 
  private:
   static const int kLocal0Offset = JavaScriptFrameConstants::kLocal0Offset;
@@ -530,7 +528,7 @@ class VirtualFrame: public ZoneObject {
 
   // Push a copy of a frame slot (typically a local or parameter) on top of
   // the frame.
-  void PushFrameSlotAt(int index);
+  inline void PushFrameSlotAt(int index);
 
   // Push a the value of a frame slot (typically a local or parameter) on
   // top of the frame and invalidate the slot.
@@ -581,7 +579,7 @@ class VirtualFrame: public ZoneObject {
   // (via PrepareForCall).
   Result RawCallCodeObject(Handle<Code> code, RelocInfo::Mode rmode);
 
-  bool Equals(VirtualFrame* other);
+  inline bool Equals(VirtualFrame* other);
 
   // Classes that need raw access to the elements_ array.
   friend class DeferredCode;
diff --git a/deps/v8/src/ic.cc b/deps/v8/src/ic.cc
index 31ece04a0b..107c3c0ae6 100644
--- a/deps/v8/src/ic.cc
+++ b/deps/v8/src/ic.cc
@@ -1049,20 +1049,6 @@ Object* StoreIC::Store(State state,
     return *value;
   }
 
-
-  // Use specialized code for setting the length of arrays.
-  if (receiver->IsJSArray()
-      && name->Equals(Heap::length_symbol())
-      && receiver->AllowsSetElementsLength()) {
-#ifdef DEBUG
-    if (FLAG_trace_ic) PrintF("[StoreIC : +#length /array]\n");
-#endif
-    Code* target = Builtins::builtin(Builtins::StoreIC_ArrayLength);
-    set_target(target);
-    StubCache::Set(*name, HeapObject::cast(*object)->map(), target);
-    return receiver->SetProperty(*name, *value, NONE);
-  }
-
   // Lookup the property locally in the receiver.
   if (FLAG_use_ic && !receiver->IsJSGlobalProxy()) {
     LookupResult lookup;
diff --git a/deps/v8/src/jump-target-inl.h b/deps/v8/src/jump-target-inl.h
index 3cd9a8bde7..12fabc329d 100644
--- a/deps/v8/src/jump-target-inl.h
+++ b/deps/v8/src/jump-target-inl.h
@@ -28,6 +28,8 @@
 #ifndef V8_JUMP_TARGET_INL_H_
 #define V8_JUMP_TARGET_INL_H_
 
+#include "virtual-frame-inl.h"
+
 namespace v8 {
 namespace internal {
 
@@ -36,14 +38,15 @@ CodeGenerator* JumpTarget::cgen() {
 }
 
 void JumpTarget::InitializeEntryElement(int index, FrameElement* target) {
-  entry_frame_->elements_[index].clear_copied();
+  FrameElement* element = &entry_frame_->elements_[index];
+  element->clear_copied();
   if (target->is_register()) {
     entry_frame_->set_register_location(target->reg(), index);
   } else if (target->is_copy()) {
     entry_frame_->elements_[target->index()].set_copied();
   }
   if (direction_ == BIDIRECTIONAL && !target->is_copy()) {
-    entry_frame_->elements_[index].set_number_info(NumberInfo::kUnknown);
+    element->set_number_info(NumberInfo::kUnknown);
   }
 }
 
diff --git a/deps/v8/src/jump-target.cc b/deps/v8/src/jump-target.cc
index bce379a924..ab09870b95 100644
--- a/deps/v8/src/jump-target.cc
+++ b/deps/v8/src/jump-target.cc
@@ -100,9 +100,8 @@ void JumpTarget::ComputeEntryFrame() {
         // change our decision about undetermined or invalid elements.
         if (element == NULL || !element->is_valid()) break;
 
-        element = element->Combine(&reaching_frames_[j]->elements_[i]);
-
         FrameElement* other = &reaching_frames_[j]->elements_[i];
+        element = element->Combine(other);
         if (element != NULL && !element->is_copy()) {
           ASSERT(other != NULL);
           // We overwrite the number information of one of the incoming frames.
diff --git a/deps/v8/src/register-allocator-inl.h b/deps/v8/src/register-allocator-inl.h
index a99f455084..718da36012 100644
--- a/deps/v8/src/register-allocator-inl.h
+++ b/deps/v8/src/register-allocator-inl.h
@@ -30,7 +30,6 @@
 
 #include "codegen.h"
 #include "register-allocator.h"
-#include "virtual-frame.h"
 
 #if V8_TARGET_ARCH_IA32
 #include "ia32/register-allocator-ia32-inl.h"
diff --git a/deps/v8/src/register-allocator.cc b/deps/v8/src/register-allocator.cc
index 349cc246d8..1655b4ac12 100644
--- a/deps/v8/src/register-allocator.cc
+++ b/deps/v8/src/register-allocator.cc
@@ -29,6 +29,7 @@
 
 #include "codegen-inl.h"
 #include "register-allocator-inl.h"
+#include "virtual-frame-inl.h"
 
 namespace v8 {
 namespace internal {
diff --git a/deps/v8/src/version.cc b/deps/v8/src/version.cc
index eaa63d541e..a9d9d0449c 100644
--- a/deps/v8/src/version.cc
+++ b/deps/v8/src/version.cc
@@ -35,7 +35,7 @@
 #define MAJOR_VERSION     2
 #define MINOR_VERSION     1
 #define BUILD_NUMBER      2
-#define PATCH_LEVEL       0
+#define PATCH_LEVEL       6
 #define CANDIDATE_VERSION false
 
 // Define SONAME to have the SCons build the put a specific SONAME into the
diff --git a/deps/v8/src/virtual-frame-inl.h b/deps/v8/src/virtual-frame-inl.h
new file mode 100644
index 0000000000..3476e41fbb
--- /dev/null
+++ b/deps/v8/src/virtual-frame-inl.h
@@ -0,0 +1,109 @@
+// Copyright 2008 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
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// 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_VIRTUAL_FRAME_INL_H_
+#define V8_VIRTUAL_FRAME_INL_H_
+
+#include "virtual-frame.h"
+
+namespace v8 {
+namespace internal {
+
+// When cloned, a frame is a deep copy of the original.
+VirtualFrame::VirtualFrame(VirtualFrame* original)
+    : elements_(original->element_count()),
+      stack_pointer_(original->stack_pointer_) {
+  elements_.AddAll(original->elements_);
+  // Copy register locations from original.
+  memcpy(&register_locations_,
+         original->register_locations_,
+         sizeof(register_locations_));
+}
+
+
+void VirtualFrame::PushFrameSlotAt(int index) {
+  elements_.Add(CopyElementAt(index));
+}
+
+
+void VirtualFrame::Push(Register reg, NumberInfo::Type info) {
+  if (is_used(reg)) {
+    int index = register_location(reg);
+    FrameElement element = CopyElementAt(index, info);
+    elements_.Add(element);
+  } else {
+    Use(reg, element_count());
+    FrameElement element =
+        FrameElement::RegisterElement(reg, FrameElement::NOT_SYNCED, info);
+    elements_.Add(element);
+  }
+}
+
+
+void VirtualFrame::Push(Handle<Object> value) {
+  FrameElement element =
+      FrameElement::ConstantElement(value, FrameElement::NOT_SYNCED);
+  elements_.Add(element);
+}
+
+
+void VirtualFrame::Push(Smi* value) {
+  Push(Handle<Object> (value));
+}
+
+
+void VirtualFrame::Nip(int num_dropped) {
+  ASSERT(num_dropped >= 0);
+  if (num_dropped == 0) return;
+  Result tos = Pop();
+  if (num_dropped > 1) {
+    Drop(num_dropped - 1);
+  }
+  SetElementAt(0, &tos);
+}
+
+
+bool VirtualFrame::Equals(VirtualFrame* other) {
+#ifdef DEBUG
+  for (int i = 0; i < RegisterAllocator::kNumRegisters; i++) {
+    if (register_location(i) != other->register_location(i)) {
+      return false;
+    }
+  }
+  if (element_count() != other->element_count()) return false;
+#endif
+  if (stack_pointer_ != other->stack_pointer_) return false;
+  for (int i = 0; i < element_count(); i++) {
+    if (!elements_[i].Equals(other->elements_[i])) return false;
+  }
+
+  return true;
+}
+
+} }  // namespace v8::internal
+
+#endif  // V8_VIRTUAL_FRAME_INL_H_
diff --git a/deps/v8/src/virtual-frame.cc b/deps/v8/src/virtual-frame.cc
index 3624e254b4..d5b5f42ae8 100644
--- a/deps/v8/src/virtual-frame.cc
+++ b/deps/v8/src/virtual-frame.cc
@@ -29,6 +29,7 @@
 
 #include "codegen-inl.h"
 #include "register-allocator-inl.h"
+#include "virtual-frame-inl.h"
 
 namespace v8 {
 namespace internal {
@@ -36,18 +37,6 @@ namespace internal {
 // -------------------------------------------------------------------------
 // VirtualFrame implementation.
 
-// When cloned, a frame is a deep copy of the original.
-VirtualFrame::VirtualFrame(VirtualFrame* original)
-    : elements_(original->element_count()),
-      stack_pointer_(original->stack_pointer_) {
-  elements_.AddAll(original->elements_);
-  // Copy register locations from original.
-  memcpy(&register_locations_,
-         original->register_locations_,
-         sizeof(register_locations_));
-}
-
-
 // Create a duplicate of an existing valid frame element.
 // We can pass an optional number type information that will override the
 // existing information about the backing element. The new information must
@@ -338,61 +327,6 @@ void VirtualFrame::SetElementAt(int index, Result* value) {
 }
 
 
-void VirtualFrame::PushFrameSlotAt(int index) {
-  elements_.Add(CopyElementAt(index));
-}
-
-
-void VirtualFrame::Push(Register reg, NumberInfo::Type info) {
-  if (is_used(reg)) {
-    int index = register_location(reg);
-    FrameElement element = CopyElementAt(index, info);
-    elements_.Add(element);
-  } else {
-    Use(reg, element_count());
-    FrameElement element =
-        FrameElement::RegisterElement(reg, FrameElement::NOT_SYNCED, info);
-    elements_.Add(element);
-  }
-}
-
-
-void VirtualFrame::Push(Handle<Object> value) {
-  FrameElement element =
-      FrameElement::ConstantElement(value, FrameElement::NOT_SYNCED);
-  elements_.Add(element);
-}
-
-
-void VirtualFrame::Nip(int num_dropped) {
-  ASSERT(num_dropped >= 0);
-  if (num_dropped == 0) return;
-  Result tos = Pop();
-  if (num_dropped > 1) {
-    Drop(num_dropped - 1);
-  }
-  SetElementAt(0, &tos);
-}
-
-
-bool VirtualFrame::Equals(VirtualFrame* other) {
-#ifdef DEBUG
-  for (int i = 0; i < RegisterAllocator::kNumRegisters; i++) {
-    if (register_location(i) != other->register_location(i)) {
-      return false;
-    }
-  }
-  if (element_count() != other->element_count()) return false;
-#endif
-  if (stack_pointer_ != other->stack_pointer_) return false;
-  for (int i = 0; i < element_count(); i++) {
-    if (!elements_[i].Equals(other->elements_[i])) return false;
-  }
-
-  return true;
-}
-
-
 // Specialization of List::ResizeAdd to non-inlined version for FrameElements.
 // The function ResizeAdd becomes a real function, whose implementation is the
 // inlined ResizeAddInternal.
diff --git a/deps/v8/src/x64/codegen-x64.cc b/deps/v8/src/x64/codegen-x64.cc
index 28a522f344..6ffb5ac7f7 100644
--- a/deps/v8/src/x64/codegen-x64.cc
+++ b/deps/v8/src/x64/codegen-x64.cc
@@ -36,6 +36,7 @@
 #include "regexp-macro-assembler.h"
 #include "register-allocator-inl.h"
 #include "scopes.h"
+#include "virtual-frame-inl.h"
 
 namespace v8 {
 namespace internal {
@@ -259,9 +260,6 @@ CodeGenerator::CodeGenerator(MacroAssembler* masm)
 }
 
 
-Scope* CodeGenerator::scope() { return info_->function()->scope(); }
-
-
 void CodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) {
   // Call the runtime to declare the globals.  The inevitable call
   // will sync frame elements to memory anyway, so we do it eagerly to
diff --git a/deps/v8/src/x64/codegen-x64.h b/deps/v8/src/x64/codegen-x64.h
index 4593a28393..309e2948f4 100644
--- a/deps/v8/src/x64/codegen-x64.h
+++ b/deps/v8/src/x64/codegen-x64.h
@@ -343,7 +343,7 @@ class CodeGenerator: public AstVisitor {
 
   // Accessors
   inline bool is_eval();
-  Scope* scope();
+  inline Scope* scope();
 
   // Generating deferred code.
   void ProcessDeferred();
diff --git a/deps/v8/src/x64/fast-codegen-x64.cc b/deps/v8/src/x64/fast-codegen-x64.cc
index 4dbf26a424..af2a1ff821 100644
--- a/deps/v8/src/x64/fast-codegen-x64.cc
+++ b/deps/v8/src/x64/fast-codegen-x64.cc
@@ -29,6 +29,7 @@
 
 #include "codegen-inl.h"
 #include "fast-codegen.h"
+#include "scopes.h"
 
 namespace v8 {
 namespace internal {
diff --git a/deps/v8/src/x64/full-codegen-x64.cc b/deps/v8/src/x64/full-codegen-x64.cc
index 30db660de0..669e1750c1 100644
--- a/deps/v8/src/x64/full-codegen-x64.cc
+++ b/deps/v8/src/x64/full-codegen-x64.cc
@@ -32,6 +32,7 @@
 #include "debug.h"
 #include "full-codegen.h"
 #include "parser.h"
+#include "scopes.h"
 
 namespace v8 {
 namespace internal {
diff --git a/deps/v8/src/x64/jump-target-x64.cc b/deps/v8/src/x64/jump-target-x64.cc
index dd2f6d6b01..9b08c1f892 100644
--- a/deps/v8/src/x64/jump-target-x64.cc
+++ b/deps/v8/src/x64/jump-target-x64.cc
@@ -30,6 +30,7 @@
 #include "codegen-inl.h"
 #include "jump-target-inl.h"
 #include "register-allocator-inl.h"
+#include "virtual-frame-inl.h"
 
 namespace v8 {
 namespace internal {
diff --git a/deps/v8/src/x64/register-allocator-x64.cc b/deps/v8/src/x64/register-allocator-x64.cc
index deb2318564..d4a47e83bc 100644
--- a/deps/v8/src/x64/register-allocator-x64.cc
+++ b/deps/v8/src/x64/register-allocator-x64.cc
@@ -29,6 +29,7 @@
 
 #include "codegen-inl.h"
 #include "register-allocator-inl.h"
+#include "virtual-frame-inl.h"
 
 namespace v8 {
 namespace internal {
diff --git a/deps/v8/src/x64/virtual-frame-x64.cc b/deps/v8/src/x64/virtual-frame-x64.cc
index a0e883c8d8..e322c614df 100644
--- a/deps/v8/src/x64/virtual-frame-x64.cc
+++ b/deps/v8/src/x64/virtual-frame-x64.cc
@@ -30,6 +30,7 @@
 #include "codegen-inl.h"
 #include "register-allocator-inl.h"
 #include "scopes.h"
+#include "virtual-frame-inl.h"
 
 namespace v8 {
 namespace internal {
diff --git a/deps/v8/src/x64/virtual-frame-x64.h b/deps/v8/src/x64/virtual-frame-x64.h
index c9aa799183..d4df4840e5 100644
--- a/deps/v8/src/x64/virtual-frame-x64.h
+++ b/deps/v8/src/x64/virtual-frame-x64.h
@@ -76,7 +76,7 @@ class VirtualFrame : public ZoneObject {
   VirtualFrame();
 
   // Construct a virtual frame as a clone of an existing one.
-  explicit VirtualFrame(VirtualFrame* original);
+  explicit inline VirtualFrame(VirtualFrame* original);
 
   CodeGenerator* cgen() { return CodeGeneratorScope::Current(); }
   MacroAssembler* masm() { return cgen()->masm(); }
@@ -395,9 +395,9 @@ class VirtualFrame : public ZoneObject {
   void EmitPush(Handle<Object> value);
 
   // Push an element on the virtual frame.
-  void Push(Register reg, NumberInfo::Type info = NumberInfo::kUnknown);
-  void Push(Handle<Object> value);
-  void Push(Smi* value) { Push(Handle<Object>(value)); }
+  inline void Push(Register reg, NumberInfo::Type info = NumberInfo::kUnknown);
+  inline void Push(Handle<Object> value);
+  inline void Push(Smi* value);
 
   // Pushing a result invalidates it (its contents become owned by the
   // frame).
@@ -414,7 +414,7 @@ class VirtualFrame : public ZoneObject {
   // Nip removes zero or more elements from immediately below the top
   // of the frame, leaving the previous top-of-frame value on top of
   // the frame.  Nip(k) is equivalent to x = Pop(), Drop(k), Push(x).
-  void Nip(int num_dropped);
+  inline void Nip(int num_dropped);
 
  private:
   static const int kLocal0Offset = JavaScriptFrameConstants::kLocal0Offset;
@@ -506,7 +506,7 @@ class VirtualFrame : public ZoneObject {
 
   // Push a copy of a frame slot (typically a local or parameter) on top of
   // the frame.
-  void PushFrameSlotAt(int index);
+  inline void PushFrameSlotAt(int index);
 
   // Push a the value of a frame slot (typically a local or parameter) on
   // top of the frame and invalidate the slot.
@@ -557,7 +557,7 @@ class VirtualFrame : public ZoneObject {
   // (via PrepareForCall).
   Result RawCallCodeObject(Handle<Code> code, RelocInfo::Mode rmode);
 
-  bool Equals(VirtualFrame* other);
+  inline bool Equals(VirtualFrame* other);
 
   // Classes that need raw access to the elements_ array.
   friend class DeferredCode;
diff --git a/deps/v8/test/cctest/test-api.cc b/deps/v8/test/cctest/test-api.cc
index a60ea574fb..10a92c38ea 100644
--- a/deps/v8/test/cctest/test-api.cc
+++ b/deps/v8/test/cctest/test-api.cc
@@ -6433,6 +6433,45 @@ THREADED_TEST(InterceptorCallICFastApi_SimpleSignature_Miss2) {
   CHECK_GE(interceptor_call_count, 50);
 }
 
+THREADED_TEST(InterceptorCallICFastApi_SimpleSignature_Miss3) {
+  int interceptor_call_count = 0;
+  v8::HandleScope scope;
+  v8::Handle<v8::FunctionTemplate> fun_templ = v8::FunctionTemplate::New();
+  v8::Handle<v8::FunctionTemplate> method_templ =
+      v8::FunctionTemplate::New(FastApiCallback_SimpleSignature,
+                                v8_str("method_data"),
+                                v8::Signature::New(fun_templ));
+  v8::Handle<v8::ObjectTemplate> proto_templ = fun_templ->PrototypeTemplate();
+  proto_templ->Set(v8_str("method"), method_templ);
+  v8::Handle<v8::ObjectTemplate> templ = fun_templ->InstanceTemplate();
+  templ->SetNamedPropertyHandler(InterceptorCallICFastApi,
+                                 NULL, NULL, NULL, NULL,
+                                 v8::External::Wrap(&interceptor_call_count));
+  LocalContext context;
+  v8::Handle<v8::Function> fun = fun_templ->GetFunction();
+  GenerateSomeGarbage();
+  context->Global()->Set(v8_str("o"), fun->NewInstance());
+  v8::TryCatch try_catch;
+  v8::Handle<Value> value = CompileRun(
+      "o.foo = 17;"
+      "var receiver = {};"
+      "receiver.__proto__ = o;"
+      "var result = 0;"
+      "var saved_result = 0;"
+      "for (var i = 0; i < 100; i++) {"
+      "  result = receiver.method(41);"
+      "  if (i == 50) {"
+      "    saved_result = result;"
+      "    receiver = 333;"
+      "  }"
+      "}");
+  CHECK(try_catch.HasCaught());
+  CHECK_EQ(v8_str("TypeError: Object 333 has no method 'method'"),
+           try_catch.Exception()->ToString());
+  CHECK_EQ(42, context->Global()->Get(v8_str("saved_result"))->Int32Value());
+  CHECK_GE(interceptor_call_count, 50);
+}
+
 THREADED_TEST(InterceptorCallICFastApi_SimpleSignature_TypeError) {
   int interceptor_call_count = 0;
   v8::HandleScope scope;
@@ -6521,7 +6560,7 @@ THREADED_TEST(CallICFastApi_SimpleSignature) {
   CHECK_EQ(42, context->Global()->Get(v8_str("result"))->Int32Value());
 }
 
-THREADED_TEST(CallICFastApi_SimpleSignature_Miss) {
+THREADED_TEST(CallICFastApi_SimpleSignature_Miss1) {
   v8::HandleScope scope;
   v8::Handle<v8::FunctionTemplate> fun_templ = v8::FunctionTemplate::New();
   v8::Handle<v8::FunctionTemplate> method_templ =
@@ -6552,6 +6591,40 @@ THREADED_TEST(CallICFastApi_SimpleSignature_Miss) {
   CHECK_EQ(42, context->Global()->Get(v8_str("saved_result"))->Int32Value());
 }
 
+THREADED_TEST(CallICFastApi_SimpleSignature_Miss2) {
+  v8::HandleScope scope;
+  v8::Handle<v8::FunctionTemplate> fun_templ = v8::FunctionTemplate::New();
+  v8::Handle<v8::FunctionTemplate> method_templ =
+      v8::FunctionTemplate::New(FastApiCallback_SimpleSignature,
+                                v8_str("method_data"),
+                                v8::Signature::New(fun_templ));
+  v8::Handle<v8::ObjectTemplate> proto_templ = fun_templ->PrototypeTemplate();
+  proto_templ->Set(v8_str("method"), method_templ);
+  v8::Handle<v8::ObjectTemplate> templ = fun_templ->InstanceTemplate();
+  LocalContext context;
+  v8::Handle<v8::Function> fun = fun_templ->GetFunction();
+  GenerateSomeGarbage();
+  context->Global()->Set(v8_str("o"), fun->NewInstance());
+  v8::TryCatch try_catch;
+  v8::Handle<Value> value = CompileRun(
+      "o.foo = 17;"
+      "var receiver = {};"
+      "receiver.__proto__ = o;"
+      "var result = 0;"
+      "var saved_result = 0;"
+      "for (var i = 0; i < 100; i++) {"
+      "  result = receiver.method(41);"
+      "  if (i == 50) {"
+      "    saved_result = result;"
+      "    receiver = 333;"
+      "  }"
+      "}");
+  CHECK(try_catch.HasCaught());
+  CHECK_EQ(v8_str("TypeError: Object 333 has no method 'method'"),
+           try_catch.Exception()->ToString());
+  CHECK_EQ(42, context->Global()->Get(v8_str("saved_result"))->Int32Value());
+}
+
 
 static int interceptor_call_count = 0;
 
diff --git a/deps/v8/test/cctest/test-thread-termination.cc b/deps/v8/test/cctest/test-thread-termination.cc
index 1e8102ec7f..83a1e1917d 100644
--- a/deps/v8/test/cctest/test-thread-termination.cc
+++ b/deps/v8/test/cctest/test-thread-termination.cc
@@ -40,6 +40,7 @@ v8::Handle<v8::Value> Signal(const v8::Arguments& args) {
 
 
 v8::Handle<v8::Value> TerminateCurrentThread(const v8::Arguments& args) {
+  CHECK(!v8::V8::IsExecutionTerminating());
   v8::V8::TerminateExecution();
   return v8::Undefined();
 }
@@ -52,15 +53,19 @@ v8::Handle<v8::Value> Fail(const v8::Arguments& args) {
 
 
 v8::Handle<v8::Value> Loop(const v8::Arguments& args) {
+  CHECK(!v8::V8::IsExecutionTerminating());
   v8::Handle<v8::String> source =
       v8::String::New("try { doloop(); fail(); } catch(e) { fail(); }");
-  v8::Script::Compile(source)->Run();
+  v8::Handle<v8::Value> result = v8::Script::Compile(source)->Run();
+  CHECK(result.IsEmpty());
+  CHECK(v8::V8::IsExecutionTerminating());
   return v8::Undefined();
 }
 
 
 v8::Handle<v8::Value> DoLoop(const v8::Arguments& args) {
   v8::TryCatch try_catch;
+  CHECK(!v8::V8::IsExecutionTerminating());
   v8::Script::Compile(v8::String::New("function f() {"
                                       "  var term = true;"
                                       "  try {"
@@ -78,12 +83,14 @@ v8::Handle<v8::Value> DoLoop(const v8::Arguments& args) {
   CHECK(try_catch.Exception()->IsNull());
   CHECK(try_catch.Message().IsEmpty());
   CHECK(!try_catch.CanContinue());
+  CHECK(v8::V8::IsExecutionTerminating());
   return v8::Undefined();
 }
 
 
 v8::Handle<v8::Value> DoLoopNoCall(const v8::Arguments& args) {
   v8::TryCatch try_catch;
+  CHECK(!v8::V8::IsExecutionTerminating());
   v8::Script::Compile(v8::String::New("var term = true;"
                                       "while(true) {"
                                       "  if (term) terminate();"
@@ -93,6 +100,7 @@ v8::Handle<v8::Value> DoLoopNoCall(const v8::Arguments& args) {
   CHECK(try_catch.Exception()->IsNull());
   CHECK(try_catch.Message().IsEmpty());
   CHECK(!try_catch.CanContinue());
+  CHECK(v8::V8::IsExecutionTerminating());
   return v8::Undefined();
 }
 
@@ -118,11 +126,13 @@ TEST(TerminateOnlyV8ThreadFromThreadItself) {
       CreateGlobalTemplate(TerminateCurrentThread, DoLoop);
   v8::Persistent<v8::Context> context = v8::Context::New(NULL, global);
   v8::Context::Scope context_scope(context);
+  CHECK(!v8::V8::IsExecutionTerminating());
   // Run a loop that will be infinite if thread termination does not work.
   v8::Handle<v8::String> source =
       v8::String::New("try { loop(); fail(); } catch(e) { fail(); }");
   v8::Script::Compile(source)->Run();
   // Test that we can run the code again after thread termination.
+  CHECK(!v8::V8::IsExecutionTerminating());
   v8::Script::Compile(source)->Run();
   context.Dispose();
 }
@@ -136,10 +146,12 @@ TEST(TerminateOnlyV8ThreadFromThreadItselfNoLoop) {
       CreateGlobalTemplate(TerminateCurrentThread, DoLoopNoCall);
   v8::Persistent<v8::Context> context = v8::Context::New(NULL, global);
   v8::Context::Scope context_scope(context);
+  CHECK(!v8::V8::IsExecutionTerminating());
   // Run a loop that will be infinite if thread termination does not work.
   v8::Handle<v8::String> source =
       v8::String::New("try { loop(); fail(); } catch(e) { fail(); }");
   v8::Script::Compile(source)->Run();
+  CHECK(!v8::V8::IsExecutionTerminating());
   // Test that we can run the code again after thread termination.
   v8::Script::Compile(source)->Run();
   context.Dispose();
@@ -149,6 +161,7 @@ TEST(TerminateOnlyV8ThreadFromThreadItselfNoLoop) {
 class TerminatorThread : public v8::internal::Thread {
   void Run() {
     semaphore->Wait();
+    CHECK(!v8::V8::IsExecutionTerminating());
     v8::V8::TerminateExecution();
   }
 };
@@ -165,6 +178,7 @@ TEST(TerminateOnlyV8ThreadFromOtherThread) {
   v8::Handle<v8::ObjectTemplate> global = CreateGlobalTemplate(Signal, DoLoop);
   v8::Persistent<v8::Context> context = v8::Context::New(NULL, global);
   v8::Context::Scope context_scope(context);
+  CHECK(!v8::V8::IsExecutionTerminating());
   // Run a loop that will be infinite if thread termination does not work.
   v8::Handle<v8::String> source =
       v8::String::New("try { loop(); fail(); } catch(e) { fail(); }");
@@ -187,6 +201,7 @@ class LoopingThread : public v8::internal::Thread {
         CreateGlobalTemplate(Signal, DoLoop);
     v8::Persistent<v8::Context> context = v8::Context::New(NULL, global);
     v8::Context::Scope context_scope(context);
+    CHECK(!v8::V8::IsExecutionTerminating());
     // Run a loop that will be infinite if thread termination does not work.
     v8::Handle<v8::String> source =
         v8::String::New("try { loop(); fail(); } catch(e) { fail(); }");
@@ -235,6 +250,7 @@ int call_count = 0;
 
 v8::Handle<v8::Value> TerminateOrReturnObject(const v8::Arguments& args) {
   if (++call_count == 10) {
+    CHECK(!v8::V8::IsExecutionTerminating());
     v8::V8::TerminateExecution();
     return v8::Undefined();
   }
@@ -246,6 +262,7 @@ v8::Handle<v8::Value> TerminateOrReturnObject(const v8::Arguments& args) {
 
 v8::Handle<v8::Value> LoopGetProperty(const v8::Arguments& args) {
   v8::TryCatch try_catch;
+  CHECK(!v8::V8::IsExecutionTerminating());
   v8::Script::Compile(v8::String::New("function f() {"
                                       "  try {"
                                       "    while(true) {"
@@ -261,6 +278,7 @@ v8::Handle<v8::Value> LoopGetProperty(const v8::Arguments& args) {
   CHECK(try_catch.Exception()->IsNull());
   CHECK(try_catch.Message().IsEmpty());
   CHECK(!try_catch.CanContinue());
+  CHECK(v8::V8::IsExecutionTerminating());
   return v8::Undefined();
 }
 
@@ -278,12 +296,14 @@ TEST(TerminateLoadICException) {
 
   v8::Persistent<v8::Context> context = v8::Context::New(NULL, global);
   v8::Context::Scope context_scope(context);
+  CHECK(!v8::V8::IsExecutionTerminating());
   // Run a loop that will be infinite if thread termination does not work.
   v8::Handle<v8::String> source =
       v8::String::New("try { loop(); fail(); } catch(e) { fail(); }");
   call_count = 0;
   v8::Script::Compile(source)->Run();
   // Test that we can run the code again after thread termination.
+  CHECK(!v8::V8::IsExecutionTerminating());
   call_count = 0;
   v8::Script::Compile(source)->Run();
   context.Dispose();
diff --git a/deps/v8/tools/gyp/v8.gyp b/deps/v8/tools/gyp/v8.gyp
index c9766d2f5c..efba10b003 100644
--- a/deps/v8/tools/gyp/v8.gyp
+++ b/deps/v8/tools/gyp/v8.gyp
@@ -391,6 +391,7 @@
         '../../src/variables.h',
         '../../src/version.cc',
         '../../src/version.h',
+        '../../src/virtual-frame-inl.h',	
         '../../src/virtual-frame.h',
         '../../src/virtual-frame.cc',
         '../../src/zone-inl.h',
diff --git a/deps/v8/tools/visual_studio/v8_base.vcproj b/deps/v8/tools/visual_studio/v8_base.vcproj
index 85935288e1..6238044611 100644
--- a/deps/v8/tools/visual_studio/v8_base.vcproj
+++ b/deps/v8/tools/visual_studio/v8_base.vcproj
@@ -936,6 +936,10 @@
 				RelativePath="..\..\src\version.h"
 				>
 			</File>
+			<File
+				RelativePath="..\..\src\virtual-frame-inl.h"
+				>
+			</File>
 			<File
 				RelativePath="..\..\src\virtual-frame.h"
 				>
diff --git a/deps/v8/tools/visual_studio/v8_base_arm.vcproj b/deps/v8/tools/visual_studio/v8_base_arm.vcproj
index 2602be455f..7f97da674e 100644
--- a/deps/v8/tools/visual_studio/v8_base_arm.vcproj
+++ b/deps/v8/tools/visual_studio/v8_base_arm.vcproj
@@ -948,6 +948,10 @@
 				RelativePath="..\..\src\version.h"
 				>
 			</File>
+			<File
+				RelativePath="..\..\src\virtual-frame-inl.h"
+				>
+			</File>
 			<File
 				RelativePath="..\..\src\virtual-frame.h"
 				>
diff --git a/deps/v8/tools/visual_studio/v8_base_x64.vcproj b/deps/v8/tools/visual_studio/v8_base_x64.vcproj
index d3f55c6a06..b7ad20d5d9 100644
--- a/deps/v8/tools/visual_studio/v8_base_x64.vcproj
+++ b/deps/v8/tools/visual_studio/v8_base_x64.vcproj
@@ -937,6 +937,10 @@
 				RelativePath="..\..\src\version.h"
 				>
 			</File>
+			<File
+				RelativePath="..\..\src\virtual-frame-inl.h"
+				>
+			</File>
 			<File
 				RelativePath="..\..\src\virtual-frame.h"
 				>