Thread the current isolate through a few places, avoiding Isolate::Current().

src/execution.h

 // Copyright 2011 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
@@ skipping 27 matching lines @@
 enum InterruptFlag {
   INTERRUPT = 1 << 0,
   DEBUGBREAK = 1 << 1,
   DEBUGCOMMAND = 1 << 2,
   PREEMPT = 1 << 3,
   TERMINATE = 1 << 4,
   RUNTIME_PROFILER_TICK = 1 << 5,
   GC_REQUEST = 1 << 6
 };
 
+
+class Isolate;
+
+
 class Execution : public AllStatic {
  public:
   // Call a function, the caller supplies a receiver and an array
   // of arguments. Arguments are Object* type. After function returns,
   // pointers in 'args' might be invalid.
   //
   // *pending_exception tells whether the invoke resulted in
   // a pending exception.
   //
   // When convert_receiver is set, and the receiver is not an object,
@@ skipping 76 matching lines @@
                                           Handle<JSFunction> fun,
                                           Handle<Object> pos,
                                           Handle<Object> is_global);
 #ifdef ENABLE_DEBUGGER_SUPPORT
   static Object* DebugBreakHelper();
   static void ProcessDebugMessages(bool debug_command_only);
 #endif
 
   // If the stack guard is triggered, but it is not an actual
   // stack overflow, then handle the interruption accordingly.
-  MUST_USE_RESULT static MaybeObject* HandleStackGuardInterrupt();
+  MUST_USE_RESULT static MaybeObject* HandleStackGuardInterrupt(
+      Isolate* isolate);
 
   // Get a function delegate (or undefined) for the given non-function
   // object. Used for support calling objects as functions.
   static Handle<Object> GetFunctionDelegate(Handle<Object> object);
   static Handle<Object> TryGetFunctionDelegate(Handle<Object> object,
                                                bool* has_pending_exception);
 
   // Get a function delegate (or undefined) for the given non-function
   // object. Used for support calling objects as constructors.
   static Handle<Object> GetConstructorDelegate(Handle<Object> object);
   static Handle<Object> TryGetConstructorDelegate(Handle<Object> object,
                                                   bool* has_pending_exception);
 };
 
 
 class ExecutionAccess;
-class Isolate;
 
 
 // StackGuard contains the handling of the limits that are used to limit the
 // number of nested invocations of JavaScript and the stack size used in each
 // invocation.
 class StackGuard {
  public:
   // Pass the address beyond which the stack should not grow.  The stack
   // is assumed to grow downwards.
   void SetStackLimit(uintptr_t limit);
@@ skipping 124 matching lines @@
   friend class StackLimitCheck;
   friend class PostponeInterruptsScope;
 
   DISALLOW_COPY_AND_ASSIGN(StackGuard);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_EXECUTION_H_