diff --git a/src/isolate.h b/src/isolate.h
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--- /dev/null
+++ b/src/isolate.h
@@ -0,0 +1,1308 @@
+// Copyright 2010 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_ISOLATE_H_
+#define V8_ISOLATE_H_
+
+#include "../include/v8-debug.h"
+#include "allocation.h"
+#include "apiutils.h"
+#include "atomicops.h"
+#include "builtins.h"
+#include "contexts.h"
+#include "execution.h"
+#include "frames.h"
+#include "global-handles.h"
+#include "handles.h"
+#include "heap.h"
+#include "regexp-stack.h"
+#include "runtime-profiler.h"
+#include "runtime.h"
+#include "zone.h"
+
+namespace v8 {
+namespace internal {
+
+class AstSentinels;
+class Bootstrapper;
+class CodeGenerator;
+class CodeRange;
+class CompilationCache;
+class ContextSlotCache;
+class ContextSwitcher;
+class Counters;
+class CpuFeatures;
+class CpuProfiler;
+class DeoptimizerData;
+class Deserializer;
+class EmptyStatement;
+class ExternalReferenceTable;
+class Factory;
+class FunctionInfoListener;
+class HandleScopeImplementer;
+class HeapProfiler;
+class InlineRuntimeFunctionsTable;
+class NoAllocationStringAllocator;
+class PcToCodeCache;
+class PreallocatedMemoryThread;
+class ProducerHeapProfile;
+class RegExpStack;
+class SaveContext;
+class ScannerConstants;
+class StringInputBuffer;
+class StringTracker;
+class StubCache;
+class ThreadManager;
+class ThreadState;
+class ThreadVisitor;  // Defined in v8threads.h
+class VMState;
+
+// 'void function pointer', used to roundtrip the
+// ExternalReference::ExternalReferenceRedirector since we can not include
+// assembler.h, where it is defined, here.
+typedef void* ExternalReferenceRedirectorPointer();
+
+
+#ifdef ENABLE_DEBUGGER_SUPPORT
+class Debug;
+class Debugger;
+class DebuggerAgent;
+#endif
+
+#if !defined(__arm__) && defined(V8_TARGET_ARCH_ARM) || \
+    !defined(__mips__) && defined(V8_TARGET_ARCH_MIPS)
+class Redirection;
+class Simulator;
+#endif
+
+
+// Static indirection table for handles to constants.  If a frame
+// element represents a constant, the data contains an index into
+// this table of handles to the actual constants.
+// Static indirection table for handles to constants.  If a Result
+// represents a constant, the data contains an index into this table
+// of handles to the actual constants.
+typedef ZoneList<Handle<Object> > ZoneObjectList;
+
+#define RETURN_IF_SCHEDULED_EXCEPTION(isolate)    \
+  if (isolate->has_scheduled_exception())         \
+      return isolate->PromoteScheduledException()
+
+#define RETURN_IF_EMPTY_HANDLE_VALUE(isolate, call, value) \
+  if (call.is_null()) {                                    \
+    ASSERT(isolate->has_pending_exception());              \
+    return value;                                          \
+  }
+
+#define RETURN_IF_EMPTY_HANDLE(isolate, call)                       \
+  RETURN_IF_EMPTY_HANDLE_VALUE(isolate, call, Failure::Exception())
+
+#define ISOLATE_ADDRESS_LIST(C)            \
+  C(handler_address)                       \
+  C(c_entry_fp_address)                    \
+  C(context_address)                       \
+  C(pending_exception_address)             \
+  C(external_caught_exception_address)
+
+#ifdef ENABLE_LOGGING_AND_PROFILING
+#define ISOLATE_ADDRESS_LIST_PROF(C)       \
+  C(js_entry_sp_address)
+#else
+#define ISOLATE_ADDRESS_LIST_PROF(C)
+#endif
+
+
+class ThreadLocalTop BASE_EMBEDDED {
+ public:
+  // Initialize the thread data.
+  void Initialize();
+
+  // Get the top C++ try catch handler or NULL if none are registered.
+  //
+  // This method is not guarenteed to return an address that can be
+  // used for comparison with addresses into the JS stack.  If such an
+  // address is needed, use try_catch_handler_address.
+  v8::TryCatch* TryCatchHandler();
+
+  // Get the address of the top C++ try catch handler or NULL if
+  // none are registered.
+  //
+  // This method always returns an address that can be compared to
+  // pointers into the JavaScript stack.  When running on actual
+  // hardware, try_catch_handler_address and TryCatchHandler return
+  // the same pointer.  When running on a simulator with a separate JS
+  // stack, try_catch_handler_address returns a JS stack address that
+  // corresponds to the place on the JS stack where the C++ handler
+  // would have been if the stack were not separate.
+  inline Address try_catch_handler_address() {
+    return try_catch_handler_address_;
+  }
+
+  // Set the address of the top C++ try catch handler.
+  inline void set_try_catch_handler_address(Address address) {
+    try_catch_handler_address_ = address;
+  }
+
+  void Free() {
+    ASSERT(!has_pending_message_);
+    ASSERT(!external_caught_exception_);
+    ASSERT(try_catch_handler_address_ == NULL);
+  }
+
+  // The context where the current execution method is created and for variable
+  // lookups.
+  Context* context_;
+  int thread_id_;
+  MaybeObject* pending_exception_;
+  bool has_pending_message_;
+  const char* pending_message_;
+  Object* pending_message_obj_;
+  Script* pending_message_script_;
+  int pending_message_start_pos_;
+  int pending_message_end_pos_;
+  // Use a separate value for scheduled exceptions to preserve the
+  // invariants that hold about pending_exception.  We may want to
+  // unify them later.
+  MaybeObject* scheduled_exception_;
+  bool external_caught_exception_;
+  SaveContext* save_context_;
+  v8::TryCatch* catcher_;
+
+  // Stack.
+  Address c_entry_fp_;  // the frame pointer of the top c entry frame
+  Address handler_;   // try-blocks are chained through the stack
+
+#ifdef USE_SIMULATOR
+#if defined(V8_TARGET_ARCH_ARM) || defined(V8_TARGET_ARCH_MIPS)
+  Simulator* simulator_;
+#endif
+#endif  // USE_SIMULATOR
+
+#ifdef ENABLE_LOGGING_AND_PROFILING
+  Address js_entry_sp_;  // the stack pointer of the bottom js entry frame
+  Address external_callback_;  // the external callback we're currently in
+#endif
+
+#ifdef ENABLE_VMSTATE_TRACKING
+  StateTag current_vm_state_;
+#endif
+
+  // Generated code scratch locations.
+  int32_t formal_count_;
+
+  // Call back function to report unsafe JS accesses.
+  v8::FailedAccessCheckCallback failed_access_check_callback_;
+
+ private:
+  Address try_catch_handler_address_;
+};
+
+#if defined(V8_TARGET_ARCH_ARM) || defined(V8_TARGET_ARCH_MIPS)
+
+#define ISOLATE_PLATFORM_INIT_LIST(V)                                          \
+  /* VirtualFrame::SpilledScope state */                                       \
+  V(bool, is_virtual_frame_in_spilled_scope, false)                            \
+  /* CodeGenerator::EmitNamedStore state */                                    \
+  V(int, inlined_write_barrier_size, -1)
+
+#if !defined(__arm__) && !defined(__mips__)
+class HashMap;
+#endif
+
+#else
+
+#define ISOLATE_PLATFORM_INIT_LIST(V)
+
+#endif
+
+#ifdef ENABLE_DEBUGGER_SUPPORT
+
+#define ISOLATE_DEBUGGER_INIT_LIST(V)                                          \
+  V(v8::Debug::EventCallback, debug_event_callback, NULL)                      \
+  V(DebuggerAgent*, debugger_agent_instance, NULL)
+#else
+
+#define ISOLATE_DEBUGGER_INIT_LIST(V)
+
+#endif
+
+#ifdef DEBUG
+
+#define ISOLATE_INIT_DEBUG_ARRAY_LIST(V)                                       \
+  V(CommentStatistic, paged_space_comments_statistics,                         \
+      CommentStatistic::kMaxComments + 1)
+#else
+
+#define ISOLATE_INIT_DEBUG_ARRAY_LIST(V)
+
+#endif
+
+#ifdef ENABLE_LOGGING_AND_PROFILING
+
+#define ISOLATE_LOGGING_INIT_LIST(V)                                           \
+  V(CpuProfiler*, cpu_profiler, NULL)                                          \
+  V(HeapProfiler*, heap_profiler, NULL)
+
+#else
+
+#define ISOLATE_LOGGING_INIT_LIST(V)
+
+#endif
+
+#define ISOLATE_INIT_ARRAY_LIST(V)                                             \
+  /* SerializerDeserializer state. */                                          \
+  V(Object*, serialize_partial_snapshot_cache, kPartialSnapshotCacheCapacity)  \
+  V(int, jsregexp_static_offsets_vector, kJSRegexpStaticOffsetsVectorSize)     \
+  V(int, bad_char_shift_table, kUC16AlphabetSize)                              \
+  V(int, good_suffix_shift_table, (kBMMaxShift + 1))                           \
+  V(int, suffix_table, (kBMMaxShift + 1))                                      \
+  ISOLATE_INIT_DEBUG_ARRAY_LIST(V)
+
+typedef List<HeapObject*, PreallocatedStorage> DebugObjectCache;
+
+#define ISOLATE_INIT_LIST(V)                                                   \
+  /* AssertNoZoneAllocation state. */                                          \
+  V(bool, zone_allow_allocation, true)                                         \
+  /* SerializerDeserializer state. */                                          \
+  V(int, serialize_partial_snapshot_cache_length, 0)                           \
+  /* Assembler state. */                                                       \
+  /* A previously allocated buffer of kMinimalBufferSize bytes, or NULL. */    \
+  V(byte*, assembler_spare_buffer, NULL)                                       \
+  V(FatalErrorCallback, exception_behavior, NULL)                              \
+  V(v8::Debug::MessageHandler, message_handler, NULL)                          \
+  /* To distinguish the function templates, so that we can find them in the */ \
+  /* function cache of the global context. */                                  \
+  V(int, next_serial_number, 0)                                                \
+  V(ExternalReferenceRedirectorPointer*, external_reference_redirector, NULL)  \
+  V(bool, always_allow_natives_syntax, false)                                  \
+  /* Part of the state of liveedit. */                                         \
+  V(FunctionInfoListener*, active_function_info_listener, NULL)                \
+  /* State for Relocatable. */                                                 \
+  V(Relocatable*, relocatable_top, NULL)                                       \
+  /* State for CodeEntry in profile-generator. */                              \
+  V(CodeGenerator*, current_code_generator, NULL)                              \
+  V(bool, jump_target_compiling_deferred_code, false)                          \
+  V(DebugObjectCache*, string_stream_debug_object_cache, NULL)                 \
+  V(Object*, string_stream_current_security_token, NULL)                       \
+  /* TODO(isolates): Release this on destruction? */                           \
+  V(int*, irregexp_interpreter_backtrack_stack_cache, NULL)                    \
+  /* Serializer state. */                                                      \
+  V(ExternalReferenceTable*, external_reference_table, NULL)                   \
+  /* AstNode state. */                                                         \
+  V(unsigned, ast_node_id, 0)                                                  \
+  V(unsigned, ast_node_count, 0)                                               \
+  ISOLATE_PLATFORM_INIT_LIST(V)                                                \
+  ISOLATE_LOGGING_INIT_LIST(V)                                                 \
+  ISOLATE_DEBUGGER_INIT_LIST(V)
+
+class Isolate {
+  // These forward declarations are required to make the friend declarations in
+  // PerIsolateThreadData work on some older versions of gcc.
+  class ThreadDataTable;
+  class EntryStackItem;
+ public:
+  ~Isolate();
+
+  typedef int ThreadId;
+
+  // A thread has a PerIsolateThreadData instance for each isolate that it has
+  // entered. That instance is allocated when the isolate is initially entered
+  // and reused on subsequent entries.
+  class PerIsolateThreadData {
+   public:
+    PerIsolateThreadData(Isolate* isolate, ThreadId thread_id)
+        : isolate_(isolate),
+          thread_id_(thread_id),
+          stack_limit_(0),
+          thread_state_(NULL),
+#if !defined(__arm__) && defined(V8_TARGET_ARCH_ARM) || \
+    !defined(__mips__) && defined(V8_TARGET_ARCH_MIPS)
+          simulator_(NULL),
+#endif
+          next_(NULL),
+          prev_(NULL) { }
+    Isolate* isolate() const { return isolate_; }
+    ThreadId thread_id() const { return thread_id_; }
+    void set_stack_limit(uintptr_t value) { stack_limit_ = value; }
+    uintptr_t stack_limit() const { return stack_limit_; }
+    ThreadState* thread_state() const { return thread_state_; }
+    void set_thread_state(ThreadState* value) { thread_state_ = value; }
+
+#if !defined(__arm__) && defined(V8_TARGET_ARCH_ARM) || \
+    !defined(__mips__) && defined(V8_TARGET_ARCH_MIPS)
+    Simulator* simulator() const { return simulator_; }
+    void set_simulator(Simulator* simulator) {
+      simulator_ = simulator;
+    }
+#endif
+
+    bool Matches(Isolate* isolate, ThreadId thread_id) const {
+      return isolate_ == isolate && thread_id_ == thread_id;
+    }
+
+   private:
+    Isolate* isolate_;
+    ThreadId thread_id_;
+    uintptr_t stack_limit_;
+    ThreadState* thread_state_;
+
+#if !defined(__arm__) && defined(V8_TARGET_ARCH_ARM) || \
+    !defined(__mips__) && defined(V8_TARGET_ARCH_MIPS)
+    Simulator* simulator_;
+#endif
+
+    PerIsolateThreadData* next_;
+    PerIsolateThreadData* prev_;
+
+    friend class Isolate;
+    friend class ThreadDataTable;
+    friend class EntryStackItem;
+
+    DISALLOW_COPY_AND_ASSIGN(PerIsolateThreadData);
+  };
+
+
+  enum AddressId {
+#define C(name) k_##name,
+    ISOLATE_ADDRESS_LIST(C)
+    ISOLATE_ADDRESS_LIST_PROF(C)
+#undef C
+    k_isolate_address_count
+  };
+
+  // Returns the PerIsolateThreadData for the current thread (or NULL if one is
+  // not currently set).
+  static PerIsolateThreadData* CurrentPerIsolateThreadData() {
+    return reinterpret_cast<PerIsolateThreadData*>(
+        Thread::GetThreadLocal(per_isolate_thread_data_key_));
+  }
+
+  // Returns the isolate inside which the current thread is running.
+  INLINE(static Isolate* Current()) {
+    Isolate* isolate = reinterpret_cast<Isolate*>(
+        Thread::GetExistingThreadLocal(isolate_key_));
+    ASSERT(isolate != NULL);
+    return isolate;
+  }
+
+  INLINE(static Isolate* UncheckedCurrent()) {
+    return reinterpret_cast<Isolate*>(Thread::GetThreadLocal(isolate_key_));
+  }
+
+  bool Init(Deserializer* des);
+
+  bool IsInitialized() { return state_ == INITIALIZED; }
+
+  // True if at least one thread Enter'ed this isolate.
+  bool IsInUse() { return entry_stack_ != NULL; }
+
+  // Destroys the non-default isolates.
+  // Sets default isolate into "has_been_disposed" state rather then destroying,
+  // for legacy API reasons.
+  void TearDown();
+
+  bool IsDefaultIsolate() const { return this == default_isolate_; }
+
+  // Ensures that process-wide resources and the default isolate have been
+  // allocated. It is only necessary to call this method in rare casses, for
+  // example if you are using V8 from within the body of a static initializer.
+  // Safe to call multiple times.
+  static void EnsureDefaultIsolate();
+
+  // Get the debugger from the default isolate. Preinitializes the
+  // default isolate if needed.
+  static Debugger* GetDefaultIsolateDebugger();
+
+  // Get the stack guard from the default isolate. Preinitializes the
+  // default isolate if needed.
+  static StackGuard* GetDefaultIsolateStackGuard();
+
+  // Returns the key used to store the pointer to the current isolate.
+  // Used internally for V8 threads that do not execute JavaScript but still
+  // are part of the domain of an isolate (like the context switcher).
+  static Thread::LocalStorageKey isolate_key() {
+    return isolate_key_;
+  }
+
+  // Returns the key used to store process-wide thread IDs.
+  static Thread::LocalStorageKey thread_id_key() {
+    return thread_id_key_;
+  }
+
+  // Atomically allocates a new thread ID.
+  static ThreadId AllocateThreadId();
+
+  // If a client attempts to create a Locker without specifying an isolate,
+  // we assume that the client is using legacy behavior. Set up the current
+  // thread to be inside the implicit isolate (or fail a check if we have
+  // switched to non-legacy behavior).
+  static void EnterDefaultIsolate();
+
+  // Debug.
+  // Mutex for serializing access to break control structures.
+  Mutex* break_access() { return break_access_; }
+
+  Address get_address_from_id(AddressId id);
+
+  // Access to top context (where the current function object was created).
+  Context* context() { return thread_local_top_.context_; }
+  void set_context(Context* context) {
+    thread_local_top_.context_ = context;
+  }
+  Context** context_address() { return &thread_local_top_.context_; }
+
+  SaveContext* save_context() {return thread_local_top_.save_context_; }
+  void set_save_context(SaveContext* save) {
+    thread_local_top_.save_context_ = save;
+  }
+
+  // Access to current thread id.
+  int thread_id() { return thread_local_top_.thread_id_; }
+  void set_thread_id(int id) { thread_local_top_.thread_id_ = id; }
+
+  // Interface to pending exception.
+  MaybeObject* pending_exception() {
+    ASSERT(has_pending_exception());
+    return thread_local_top_.pending_exception_;
+  }
+  bool external_caught_exception() {
+    return thread_local_top_.external_caught_exception_;
+  }
+  void set_pending_exception(MaybeObject* exception) {
+    thread_local_top_.pending_exception_ = exception;
+  }
+  void clear_pending_exception() {
+    thread_local_top_.pending_exception_ = heap_.the_hole_value();
+  }
+  MaybeObject** pending_exception_address() {
+    return &thread_local_top_.pending_exception_;
+  }
+  bool has_pending_exception() {
+    return !thread_local_top_.pending_exception_->IsTheHole();
+  }
+  void clear_pending_message() {
+    thread_local_top_.has_pending_message_ = false;
+    thread_local_top_.pending_message_ = NULL;
+    thread_local_top_.pending_message_obj_ = heap_.the_hole_value();
+    thread_local_top_.pending_message_script_ = NULL;
+  }
+  v8::TryCatch* try_catch_handler() {
+    return thread_local_top_.TryCatchHandler();
+  }
+  Address try_catch_handler_address() {
+    return thread_local_top_.try_catch_handler_address();
+  }
+  bool* external_caught_exception_address() {
+    return &thread_local_top_.external_caught_exception_;
+  }
+
+  MaybeObject** scheduled_exception_address() {
+    return &thread_local_top_.scheduled_exception_;
+  }
+  MaybeObject* scheduled_exception() {
+    ASSERT(has_scheduled_exception());
+    return thread_local_top_.scheduled_exception_;
+  }
+  bool has_scheduled_exception() {
+    return !thread_local_top_.scheduled_exception_->IsTheHole();
+  }
+  void clear_scheduled_exception() {
+    thread_local_top_.scheduled_exception_ = heap_.the_hole_value();
+  }
+
+  bool IsExternallyCaught();
+
+  bool is_catchable_by_javascript(MaybeObject* exception) {
+    return (exception != Failure::OutOfMemoryException()) &&
+        (exception != heap()->termination_exception());
+  }
+
+  // JS execution stack (see frames.h).
+  static Address c_entry_fp(ThreadLocalTop* thread) {
+    return thread->c_entry_fp_;
+  }
+  static Address handler(ThreadLocalTop* thread) { return thread->handler_; }
+
+  inline Address* c_entry_fp_address() {
+    return &thread_local_top_.c_entry_fp_;
+  }
+  inline Address* handler_address() { return &thread_local_top_.handler_; }
+
+#ifdef ENABLE_LOGGING_AND_PROFILING
+  // Bottom JS entry (see StackTracer::Trace in log.cc).
+  static Address js_entry_sp(ThreadLocalTop* thread) {
+    return thread->js_entry_sp_;
+  }
+  inline Address* js_entry_sp_address() {
+    return &thread_local_top_.js_entry_sp_;
+  }
+#endif
+
+  // Generated code scratch locations.
+  void* formal_count_address() { return &thread_local_top_.formal_count_; }
+
+  // Returns the global object of the current context. It could be
+  // a builtin object, or a js global object.
+  Handle<GlobalObject> global() {
+    return Handle<GlobalObject>(context()->global());
+  }
+
+  // Returns the global proxy object of the current context.
+  Object* global_proxy() {
+    return context()->global_proxy();
+  }
+
+  Handle<JSBuiltinsObject> js_builtins_object() {
+    return Handle<JSBuiltinsObject>(thread_local_top_.context_->builtins());
+  }
+
+  static int ArchiveSpacePerThread() { return sizeof(ThreadLocalTop); }
+  void FreeThreadResources() { thread_local_top_.Free(); }
+
+  // This method is called by the api after operations that may throw
+  // exceptions.  If an exception was thrown and not handled by an external
+  // handler the exception is scheduled to be rethrown when we return to running
+  // JavaScript code.  If an exception is scheduled true is returned.
+  bool OptionalRescheduleException(bool is_bottom_call);
+
+  void SetCaptureStackTraceForUncaughtExceptions(
+      bool capture,
+      int frame_limit,
+      StackTrace::StackTraceOptions options);
+
+  // Tells whether the current context has experienced an out of memory
+  // exception.
+  bool is_out_of_memory();
+
+  void PrintCurrentStackTrace(FILE* out);
+  void PrintStackTrace(FILE* out, char* thread_data);
+  void PrintStack(StringStream* accumulator);
+  void PrintStack();
+  Handle<String> StackTraceString();
+  Handle<JSArray> CaptureCurrentStackTrace(
+      int frame_limit,
+      StackTrace::StackTraceOptions options);
+
+  // Returns if the top context may access the given global object. If
+  // the result is false, the pending exception is guaranteed to be
+  // set.
+  bool MayNamedAccess(JSObject* receiver,
+                      Object* key,
+                      v8::AccessType type);
+  bool MayIndexedAccess(JSObject* receiver,
+                        uint32_t index,
+                        v8::AccessType type);
+
+  void SetFailedAccessCheckCallback(v8::FailedAccessCheckCallback callback);
+  void ReportFailedAccessCheck(JSObject* receiver, v8::AccessType type);
+
+  // Exception throwing support. The caller should use the result
+  // of Throw() as its return value.
+  Failure* Throw(Object* exception, MessageLocation* location = NULL);
+  // Re-throw an exception.  This involves no error reporting since
+  // error reporting was handled when the exception was thrown
+  // originally.
+  Failure* ReThrow(MaybeObject* exception, MessageLocation* location = NULL);
+  void ScheduleThrow(Object* exception);
+  void ReportPendingMessages();
+  Failure* ThrowIllegalOperation();
+
+  // Promote a scheduled exception to pending. Asserts has_scheduled_exception.
+  Failure* PromoteScheduledException();
+  void DoThrow(MaybeObject* exception,
+               MessageLocation* location,
+               const char* message);
+  // Checks if exception should be reported and finds out if it's
+  // caught externally.
+  bool ShouldReportException(bool* can_be_caught_externally,
+                             bool catchable_by_javascript);
+
+  // Attempts to compute the current source location, storing the
+  // result in the target out parameter.
+  void ComputeLocation(MessageLocation* target);
+
+  // Override command line flag.
+  void TraceException(bool flag);
+
+  // Out of resource exception helpers.
+  Failure* StackOverflow();
+  Failure* TerminateExecution();
+
+  // Administration
+  void Iterate(ObjectVisitor* v);
+  void Iterate(ObjectVisitor* v, ThreadLocalTop* t);
+  char* Iterate(ObjectVisitor* v, char* t);
+  void IterateThread(ThreadVisitor* v);
+  void IterateThread(ThreadVisitor* v, char* t);
+
+
+  // Returns the current global context.
+  Handle<Context> global_context();
+
+  // Returns the global context of the calling JavaScript code.  That
+  // is, the global context of the top-most JavaScript frame.
+  Handle<Context> GetCallingGlobalContext();
+
+  void RegisterTryCatchHandler(v8::TryCatch* that);
+  void UnregisterTryCatchHandler(v8::TryCatch* that);
+
+  char* ArchiveThread(char* to);
+  char* RestoreThread(char* from);
+
+  static const char* const kStackOverflowMessage;
+
+  static const int kUC16AlphabetSize = 256;  // See StringSearchBase.
+  static const int kBMMaxShift = 250;        // See StringSearchBase.
+
+  // Accessors.
+#define GLOBAL_ACCESSOR(type, name, initialvalue)                       \
+  inline type name() const {                                            \
+    ASSERT(OFFSET_OF(Isolate, name##_) == name##_debug_offset_);        \
+    return name##_;                                                     \
+  }                                                                     \
+  inline void set_##name(type value) {                                  \
+    ASSERT(OFFSET_OF(Isolate, name##_) == name##_debug_offset_);        \
+    name##_ = value;                                                    \
+  }
+  ISOLATE_INIT_LIST(GLOBAL_ACCESSOR)
+#undef GLOBAL_ACCESSOR
+
+#define GLOBAL_ARRAY_ACCESSOR(type, name, length)                       \
+  inline type* name() {                                                 \
+    ASSERT(OFFSET_OF(Isolate, name##_) == name##_debug_offset_);        \
+    return &(name##_)[0];                                               \
+  }
+  ISOLATE_INIT_ARRAY_LIST(GLOBAL_ARRAY_ACCESSOR)
+#undef GLOBAL_ARRAY_ACCESSOR
+
+#define GLOBAL_CONTEXT_FIELD_ACCESSOR(index, type, name)      \
+  Handle<type> name() {                                       \
+    return Handle<type>(context()->global_context()->name()); \
+  }
+  GLOBAL_CONTEXT_FIELDS(GLOBAL_CONTEXT_FIELD_ACCESSOR)
+#undef GLOBAL_CONTEXT_FIELD_ACCESSOR
+
+  Bootstrapper* bootstrapper() { return bootstrapper_; }
+  Counters* counters() { return counters_; }
+  // TODO(isolates): Having CPU features per isolate is probably too
+  // flexible. We only really need to have the set of currently
+  // enabled features for asserts in DEBUG builds.
+  CpuFeatures* cpu_features() { return cpu_features_; }
+  CodeRange* code_range() { return code_range_; }
+  RuntimeProfiler* runtime_profiler() { return runtime_profiler_; }
+  CompilationCache* compilation_cache() { return compilation_cache_; }
+  Logger* logger() { return logger_; }
+  StackGuard* stack_guard() { return &stack_guard_; }
+  Heap* heap() { return &heap_; }
+  StatsTable* stats_table() { return stats_table_; }
+  StubCache* stub_cache() { return stub_cache_; }
+  DeoptimizerData* deoptimizer_data() { return deoptimizer_data_; }
+  ThreadLocalTop* thread_local_top() { return &thread_local_top_; }
+
+  TranscendentalCache* transcendental_cache() const {
+    return transcendental_cache_;
+  }
+
+  MemoryAllocator* memory_allocator() {
+    return memory_allocator_;
+  }
+
+  KeyedLookupCache* keyed_lookup_cache() {
+    return keyed_lookup_cache_;
+  }
+
+  ContextSlotCache* context_slot_cache() {
+    return context_slot_cache_;
+  }
+
+  DescriptorLookupCache* descriptor_lookup_cache() {
+    return descriptor_lookup_cache_;
+  }
+
+  v8::ImplementationUtilities::HandleScopeData* handle_scope_data() {
+    return &handle_scope_data_;
+  }
+  HandleScopeImplementer* handle_scope_implementer() {
+    ASSERT(handle_scope_implementer_);
+    return handle_scope_implementer_;
+  }
+  Zone* zone() { return &zone_; }
+
+  ScannerConstants* scanner_constants() {
+    return scanner_constants_;
+  }
+
+  PcToCodeCache* pc_to_code_cache() { return pc_to_code_cache_; }
+
+  StringInputBuffer* write_input_buffer() { return write_input_buffer_; }
+
+  GlobalHandles* global_handles() { return global_handles_; }
+
+  ThreadManager* thread_manager() { return thread_manager_; }
+
+  ContextSwitcher* context_switcher() { return context_switcher_; }
+
+  void set_context_switcher(ContextSwitcher* switcher) {
+    context_switcher_ = switcher;
+  }
+
+  StringTracker* string_tracker() { return string_tracker_; }
+
+  unibrow::Mapping<unibrow::Ecma262UnCanonicalize>* jsregexp_uncanonicalize() {
+    return &jsregexp_uncanonicalize_;
+  }
+
+  unibrow::Mapping<unibrow::CanonicalizationRange>* jsregexp_canonrange() {
+    return &jsregexp_canonrange_;
+  }
+
+  StringInputBuffer* objects_string_compare_buffer_a() {
+    return &objects_string_compare_buffer_a_;
+  }
+
+  StringInputBuffer* objects_string_compare_buffer_b() {
+    return &objects_string_compare_buffer_b_;
+  }
+
+  StaticResource<StringInputBuffer>* objects_string_input_buffer() {
+    return &objects_string_input_buffer_;
+  }
+
+  AstSentinels* ast_sentinels() { return ast_sentinels_; }
+
+  RuntimeState* runtime_state() { return &runtime_state_; }
+
+  StringInputBuffer* liveedit_compare_substrings_buf1() {
+    return &liveedit_compare_substrings_buf1_;
+  }
+
+  StringInputBuffer* liveedit_compare_substrings_buf2() {
+    return &liveedit_compare_substrings_buf2_;
+  }
+
+  StaticResource<SafeStringInputBuffer>* compiler_safe_string_input_buffer() {
+    return &compiler_safe_string_input_buffer_;
+  }
+
+  Builtins* builtins() { return &builtins_; }
+
+  unibrow::Mapping<unibrow::Ecma262Canonicalize>*
+      regexp_macro_assembler_canonicalize() {
+    return &regexp_macro_assembler_canonicalize_;
+  }
+
+  RegExpStack* regexp_stack() { return regexp_stack_; }
+
+  unibrow::Mapping<unibrow::Ecma262Canonicalize>*
+      interp_canonicalize_mapping() {
+    return &interp_canonicalize_mapping_;
+  }
+
+  ZoneObjectList* frame_element_constant_list() {
+    return &frame_element_constant_list_;
+  }
+
+  ZoneObjectList* result_constant_list() {
+    return &result_constant_list_;
+  }
+
+  void* PreallocatedStorageNew(size_t size);
+  void PreallocatedStorageDelete(void* p);
+  void PreallocatedStorageInit(size_t size);
+
+#ifdef ENABLE_DEBUGGER_SUPPORT
+  Debugger* debugger() { return debugger_; }
+  Debug* debug() { return debug_; }
+#endif
+
+#ifdef ENABLE_LOGGING_AND_PROFILING
+  ProducerHeapProfile* producer_heap_profile() {
+    return producer_heap_profile_;
+  }
+#endif
+
+#ifdef DEBUG
+  HistogramInfo* heap_histograms() { return heap_histograms_; }
+
+  JSObject::SpillInformation* js_spill_information() {
+    return &js_spill_information_;
+  }
+
+  int* code_kind_statistics() { return code_kind_statistics_; }
+#endif
+
+#if defined(V8_TARGET_ARCH_ARM) && !defined(__arm__) || \
+    defined(V8_TARGET_ARCH_MIPS) && !defined(__mips__)
+  bool simulator_initialized() { return simulator_initialized_; }
+  void set_simulator_initialized(bool initialized) {
+    simulator_initialized_ = initialized;
+  }
+
+  HashMap* simulator_i_cache() { return simulator_i_cache_; }
+  void set_simulator_i_cache(HashMap* hash_map) {
+    simulator_i_cache_ = hash_map;
+  }
+
+  Redirection* simulator_redirection() {
+    return simulator_redirection_;
+  }
+  void set_simulator_redirection(Redirection* redirection) {
+    simulator_redirection_ = redirection;
+  }
+#endif
+
+  Factory* factory() { return reinterpret_cast<Factory*>(this); }
+
+  // SerializerDeserializer state.
+  static const int kPartialSnapshotCacheCapacity = 1400;
+
+  static const int kJSRegexpStaticOffsetsVectorSize = 50;
+
+#ifdef ENABLE_LOGGING_AND_PROFILING
+  Address external_callback() {
+    return thread_local_top_.external_callback_;
+  }
+  void set_external_callback(Address callback) {
+    thread_local_top_.external_callback_ = callback;
+  }
+#endif
+
+#ifdef ENABLE_VMSTATE_TRACKING
+  StateTag current_vm_state() {
+    return thread_local_top_.current_vm_state_;
+  }
+
+  void SetCurrentVMState(StateTag state) {
+    if (RuntimeProfiler::IsEnabled()) {
+      if (state == JS) {
+        // JS or non-JS -> JS transition.
+        RuntimeProfiler::IsolateEnteredJS(this);
+      } else if (thread_local_top_.current_vm_state_ == JS) {
+        // JS -> non-JS transition.
+        ASSERT(RuntimeProfiler::IsSomeIsolateInJS());
+        RuntimeProfiler::IsolateExitedJS(this);
+      }
+    }
+    thread_local_top_.current_vm_state_ = state;
+  }
+#endif
+
+  void ResetEagerOptimizingData();
+
+ private:
+  Isolate();
+
+  // The per-process lock should be acquired before the ThreadDataTable is
+  // modified.
+  class ThreadDataTable {
+   public:
+    ThreadDataTable();
+    ~ThreadDataTable();
+
+    PerIsolateThreadData* Lookup(Isolate* isolate, ThreadId thread_id);
+    void Insert(PerIsolateThreadData* data);
+    void Remove(Isolate* isolate, ThreadId thread_id);
+    void Remove(PerIsolateThreadData* data);
+
+   private:
+    PerIsolateThreadData* list_;
+  };
+
+  // These items form a stack synchronously with threads Enter'ing and Exit'ing
+  // the Isolate. The top of the stack points to a thread which is currently
+  // running the Isolate. When the stack is empty, the Isolate is considered
+  // not entered by any thread and can be Disposed.
+  // If the same thread enters the Isolate more then once, the entry_count_
+  // is incremented rather then a new item pushed to the stack.
+  class EntryStackItem {
+   public:
+    EntryStackItem(PerIsolateThreadData* previous_thread_data,
+                   Isolate* previous_isolate,
+                   EntryStackItem* previous_item)
+        : entry_count(1),
+          previous_thread_data(previous_thread_data),
+          previous_isolate(previous_isolate),
+          previous_item(previous_item) { }
+
+    int entry_count;
+    PerIsolateThreadData* previous_thread_data;
+    Isolate* previous_isolate;
+    EntryStackItem* previous_item;
+
+    DISALLOW_COPY_AND_ASSIGN(EntryStackItem);
+  };
+
+  // This mutex protects highest_thread_id_, thread_data_table_ and
+  // default_isolate_.
+  static Mutex* process_wide_mutex_;
+
+  static Thread::LocalStorageKey per_isolate_thread_data_key_;
+  static Thread::LocalStorageKey isolate_key_;
+  static Thread::LocalStorageKey thread_id_key_;
+  static Isolate* default_isolate_;
+  static ThreadDataTable* thread_data_table_;
+  static ThreadId highest_thread_id_;
+
+  bool PreInit();
+
+  void Deinit();
+
+  static void SetIsolateThreadLocals(Isolate* isolate,
+                                     PerIsolateThreadData* data);
+
+  enum State {
+    UNINITIALIZED,    // Some components may not have been allocated.
+    PREINITIALIZED,   // Components have been allocated but not initialized.
+    INITIALIZED       // All components are fully initialized.
+  };
+
+  State state_;
+  EntryStackItem* entry_stack_;
+
+  // Allocate and insert PerIsolateThreadData into the ThreadDataTable
+  // (regardless of whether such data already exists).
+  PerIsolateThreadData* AllocatePerIsolateThreadData(ThreadId thread_id);
+
+  // Find the PerThread for this particular (isolate, thread) combination.
+  // If one does not yet exist, allocate a new one.
+  PerIsolateThreadData* FindOrAllocatePerThreadDataForThisThread();
+
+  // PreInits and returns a default isolate. Needed when a new thread tries
+  // to create a Locker for the first time (the lock itself is in the isolate).
+  static Isolate* GetDefaultIsolateForLocking();
+
+  // Initializes the current thread to run this Isolate.
+  // Not thread-safe. Multiple threads should not Enter/Exit the same isolate
+  // at the same time, this should be prevented using external locking.
+  void Enter();
+
+  // Exits the current thread. The previosuly entered Isolate is restored
+  // for the thread.
+  // Not thread-safe. Multiple threads should not Enter/Exit the same isolate
+  // at the same time, this should be prevented using external locking.
+  void Exit();
+
+  void PreallocatedMemoryThreadStart();
+  void PreallocatedMemoryThreadStop();
+  void InitializeThreadLocal();
+
+  void PrintStackTrace(FILE* out, ThreadLocalTop* thread);
+  void MarkCompactPrologue(bool is_compacting,
+                           ThreadLocalTop* archived_thread_data);
+  void MarkCompactEpilogue(bool is_compacting,
+                           ThreadLocalTop* archived_thread_data);
+
+  void FillCache();
+
+  int stack_trace_nesting_level_;
+  StringStream* incomplete_message_;
+  // The preallocated memory thread singleton.
+  PreallocatedMemoryThread* preallocated_memory_thread_;
+  Address isolate_addresses_[k_isolate_address_count + 1];  // NOLINT
+  NoAllocationStringAllocator* preallocated_message_space_;
+
+  Bootstrapper* bootstrapper_;
+  RuntimeProfiler* runtime_profiler_;
+  CompilationCache* compilation_cache_;
+  Counters* counters_;
+  CpuFeatures* cpu_features_;
+  CodeRange* code_range_;
+  Mutex* break_access_;
+  Heap heap_;
+  Logger* logger_;
+  StackGuard stack_guard_;
+  StatsTable* stats_table_;
+  StubCache* stub_cache_;
+  DeoptimizerData* deoptimizer_data_;
+  ThreadLocalTop thread_local_top_;
+  bool capture_stack_trace_for_uncaught_exceptions_;
+  int stack_trace_for_uncaught_exceptions_frame_limit_;
+  StackTrace::StackTraceOptions stack_trace_for_uncaught_exceptions_options_;
+  TranscendentalCache* transcendental_cache_;
+  MemoryAllocator* memory_allocator_;
+  KeyedLookupCache* keyed_lookup_cache_;
+  ContextSlotCache* context_slot_cache_;
+  DescriptorLookupCache* descriptor_lookup_cache_;
+  v8::ImplementationUtilities::HandleScopeData handle_scope_data_;
+  HandleScopeImplementer* handle_scope_implementer_;
+  ScannerConstants* scanner_constants_;
+  Zone zone_;
+  PreallocatedStorage in_use_list_;
+  PreallocatedStorage free_list_;
+  bool preallocated_storage_preallocated_;
+  PcToCodeCache* pc_to_code_cache_;
+  StringInputBuffer* write_input_buffer_;
+  GlobalHandles* global_handles_;
+  ContextSwitcher* context_switcher_;
+  ThreadManager* thread_manager_;
+  AstSentinels* ast_sentinels_;
+  RuntimeState runtime_state_;
+  StringInputBuffer liveedit_compare_substrings_buf1_;
+  StringInputBuffer liveedit_compare_substrings_buf2_;
+  StaticResource<SafeStringInputBuffer> compiler_safe_string_input_buffer_;
+  Builtins builtins_;
+  StringTracker* string_tracker_;
+  unibrow::Mapping<unibrow::Ecma262UnCanonicalize> jsregexp_uncanonicalize_;
+  unibrow::Mapping<unibrow::CanonicalizationRange> jsregexp_canonrange_;
+  StringInputBuffer objects_string_compare_buffer_a_;
+  StringInputBuffer objects_string_compare_buffer_b_;
+  StaticResource<StringInputBuffer> objects_string_input_buffer_;
+  unibrow::Mapping<unibrow::Ecma262Canonicalize>
+      regexp_macro_assembler_canonicalize_;
+  RegExpStack* regexp_stack_;
+  unibrow::Mapping<unibrow::Ecma262Canonicalize> interp_canonicalize_mapping_;
+  ZoneObjectList frame_element_constant_list_;
+  ZoneObjectList result_constant_list_;
+
+#if defined(V8_TARGET_ARCH_ARM) && !defined(__arm__) || \
+    defined(V8_TARGET_ARCH_MIPS) && !defined(__mips__)
+  bool simulator_initialized_;
+  HashMap* simulator_i_cache_;
+  Redirection* simulator_redirection_;
+#endif
+
+#ifdef DEBUG
+  // A static array of histogram info for each type.
+  HistogramInfo heap_histograms_[LAST_TYPE + 1];
+  JSObject::SpillInformation js_spill_information_;
+  int code_kind_statistics_[Code::NUMBER_OF_KINDS];
+#endif
+
+#ifdef ENABLE_DEBUGGER_SUPPORT
+  Debugger* debugger_;
+  Debug* debug_;
+#endif
+
+#ifdef ENABLE_LOGGING_AND_PROFILING
+  ProducerHeapProfile* producer_heap_profile_;
+#endif
+
+#define GLOBAL_BACKING_STORE(type, name, initialvalue)                         \
+  type name##_;
+  ISOLATE_INIT_LIST(GLOBAL_BACKING_STORE)
+#undef GLOBAL_BACKING_STORE
+
+#define GLOBAL_ARRAY_BACKING_STORE(type, name, length)                         \
+  type name##_[length];
+  ISOLATE_INIT_ARRAY_LIST(GLOBAL_ARRAY_BACKING_STORE)
+#undef GLOBAL_ARRAY_BACKING_STORE
+
+#ifdef DEBUG
+  // This class is huge and has a number of fields controlled by
+  // preprocessor defines. Make sure the offsets of these fields agree
+  // between compilation units.
+#define ISOLATE_FIELD_OFFSET(type, name, ignored)                              \
+  static const intptr_t name##_debug_offset_;
+  ISOLATE_INIT_LIST(ISOLATE_FIELD_OFFSET)
+  ISOLATE_INIT_ARRAY_LIST(ISOLATE_FIELD_OFFSET)
+#undef ISOLATE_FIELD_OFFSET
+#endif
+
+  friend class ExecutionAccess;
+  friend class IsolateInitializer;
+  friend class v8::Isolate;
+  friend class v8::Locker;
+
+  DISALLOW_COPY_AND_ASSIGN(Isolate);
+};
+
+
+// If the GCC version is 4.1.x or 4.2.x an additional field is added to the
+// class as a work around for a bug in the generated code found with these
+// versions of GCC. See V8 issue 122 for details.
+class SaveContext BASE_EMBEDDED {
+ public:
+  explicit SaveContext(Isolate* isolate) : prev_(isolate->save_context()) {
+    if (isolate->context() != NULL) {
+      context_ = Handle<Context>(isolate->context());
+#if __GNUC_VERSION__ >= 40100 && __GNUC_VERSION__ < 40300
+      dummy_ = Handle<Context>(isolate->context());
+#endif
+    }
+    isolate->set_save_context(this);
+
+    // If there is no JS frame under the current C frame, use the value 0.
+    JavaScriptFrameIterator it;
+    js_sp_ = it.done() ? 0 : it.frame()->sp();
+  }
+
+  ~SaveContext() {
+    if (context_.is_null()) {
+      Isolate* isolate = Isolate::Current();
+      isolate->set_context(NULL);
+      isolate->set_save_context(prev_);
+    } else {
+      Isolate* isolate = context_->GetIsolate();
+      isolate->set_context(*context_);
+      isolate->set_save_context(prev_);
+    }
+  }
+
+  Handle<Context> context() { return context_; }
+  SaveContext* prev() { return prev_; }
+
+  // Returns true if this save context is below a given JavaScript frame.
+  bool below(JavaScriptFrame* frame) {
+    return (js_sp_ == 0) || (frame->sp() < js_sp_);
+  }
+
+ private:
+  Handle<Context> context_;
+#if __GNUC_VERSION__ >= 40100 && __GNUC_VERSION__ < 40300
+  Handle<Context> dummy_;
+#endif
+  SaveContext* prev_;
+  Address js_sp_;  // The top JS frame's sp when saving context.
+};
+
+
+class AssertNoContextChange BASE_EMBEDDED {
+#ifdef DEBUG
+ public:
+  AssertNoContextChange() :
+      scope_(Isolate::Current()),
+      context_(Isolate::Current()->context(), Isolate::Current()) {
+  }
+
+  ~AssertNoContextChange() {
+    ASSERT(Isolate::Current()->context() == *context_);
+  }
+
+ private:
+  HandleScope scope_;
+  Handle<Context> context_;
+#else
+ public:
+  AssertNoContextChange() { }
+#endif
+};
+
+
+class ExecutionAccess BASE_EMBEDDED {
+ public:
+  explicit ExecutionAccess(Isolate* isolate) : isolate_(isolate) {
+    Lock(isolate);
+  }
+  ~ExecutionAccess() { Unlock(isolate_); }
+
+  static void Lock(Isolate* isolate) { isolate->break_access_->Lock(); }
+  static void Unlock(Isolate* isolate) { isolate->break_access_->Unlock(); }
+
+  static bool TryLock(Isolate* isolate) {
+    return isolate->break_access_->TryLock();
+  }
+
+ private:
+  Isolate* isolate_;
+};
+
+
+// Support for checking for stack-overflows in C++ code.
+class StackLimitCheck BASE_EMBEDDED {
+ public:
+  explicit StackLimitCheck(Isolate* isolate) : isolate_(isolate) { }
+
+  bool HasOverflowed() const {
+    StackGuard* stack_guard = isolate_->stack_guard();
+    // Stack has overflowed in C++ code only if stack pointer exceeds the C++
+    // stack guard and the limits are not set to interrupt values.
+    // TODO(214): Stack overflows are ignored if a interrupt is pending. This
+    // code should probably always use the initial C++ limit.
+    return (reinterpret_cast<uintptr_t>(this) < stack_guard->climit()) &&
+           stack_guard->IsStackOverflow();
+  }
+ private:
+  Isolate* isolate_;
+};
+
+
+// Support for temporarily postponing interrupts. When the outermost
+// postpone scope is left the interrupts will be re-enabled and any
+// interrupts that occurred while in the scope will be taken into
+// account.
+class PostponeInterruptsScope BASE_EMBEDDED {
+ public:
+  explicit PostponeInterruptsScope(Isolate* isolate)
+      : stack_guard_(isolate->stack_guard()) {
+    stack_guard_->thread_local_.postpone_interrupts_nesting_++;
+    stack_guard_->DisableInterrupts();
+  }
+
+  ~PostponeInterruptsScope() {
+    if (--stack_guard_->thread_local_.postpone_interrupts_nesting_ == 0) {
+      stack_guard_->EnableInterrupts();
+    }
+  }
+ private:
+  StackGuard* stack_guard_;
+};
+
+
+// Temporary macros for accessing current isolate and its subobjects.
+// They provide better readability, especially when used a lot in the code.
+#define HEAP (v8::internal::Isolate::Current()->heap())
+#define FACTORY (v8::internal::Isolate::Current()->factory())
+#define ISOLATE (v8::internal::Isolate::Current())
+#define ZONE (v8::internal::Isolate::Current()->zone())
+#define LOGGER (v8::internal::Isolate::Current()->logger())
+
+
+// Tells whether the global context is marked with out of memory.
+inline bool Context::has_out_of_memory() {
+  return global_context()->out_of_memory()->IsTrue();
+}
+
+
+// Mark the global context with out of memory.
+inline void Context::mark_out_of_memory() {
+  global_context()->set_out_of_memory(HEAP->true_value());
+}
+
+
+// Temporary macro to be used to flag definitions that are indeed static
+// and not per-isolate. (It would be great to be able to grep for [static]!)
+#define RLYSTC static
+
+
+// Temporary macro to be used to flag classes that should be static.
+#define STATIC_CLASS class
+
+
+// Temporary macro to be used to flag classes that are completely converted
+// to be isolate-friendly. Their mix of static/nonstatic methods/fields is
+// correct.
+#define ISOLATED_CLASS class
+
+} }  // namespace v8::internal
+
+// TODO(isolates): Get rid of these -inl.h includes and place them only where
+//                 they're needed.
+#include "allocation-inl.h"
+#include "zone-inl.h"
+#include "frames-inl.h"
+
+#endif  // V8_ISOLATE_H_