Add support for forceful termination of JavaScript execution.

src/top.h

 // Copyright 2006-2008 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
@@ skipping 28 matching lines @@
 
 // Top has static variables used for JavaScript execution.
 
 class SaveContext;  // Forward declaration.
 
 class ThreadLocalTop BASE_EMBEDDED {
  public:
   // The context where the current execution method is created and for variable
   // lookups.
   Context* context_;
+  int thread_id_;
   Object* 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.
@@ skipping 52 matching lines @@
   static void set_context(Context* context) {
     thread_local_.context_ = context;
   }
   static Context** context_address() { return &thread_local_.context_; }
 
   static SaveContext* save_context() {return thread_local_.save_context_; }
   static void set_save_context(SaveContext* save) {
     thread_local_.save_context_ = save;
   }
 
+  // Access to current thread id.
+  static int thread_id() { return thread_local_.thread_id_; }
+  static void set_thread_id(int id) { thread_local_.thread_id_ = id; }
+
   // Interface to pending exception.
   static Object* pending_exception() {
     ASSERT(has_pending_exception());
     return thread_local_.pending_exception_;
   }
   static bool external_caught_exception() {
     return thread_local_.external_caught_exception_;
   }
   static void set_pending_exception(Object* exception) {
     thread_local_.pending_exception_ = exception;
@@ skipping 14 matching lines @@
     thread_local_.pending_message_obj_ = Heap::the_hole_value();
     thread_local_.pending_message_script_ = NULL;
   }
   static v8::TryCatch* try_catch_handler() {
     return thread_local_.try_catch_handler_;
   }
   // 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.
-  static bool optional_reschedule_exception(bool is_bottom_call);
+  static bool OptionalRescheduleException(bool is_bottom_call,
+                                          bool force_clear_catchable);
 
   static bool* external_caught_exception_address() {
     return &thread_local_.external_caught_exception_;
   }
 
   static Object* scheduled_exception() {
     ASSERT(has_scheduled_exception());
     return thread_local_.scheduled_exception_;
   }
   static bool has_scheduled_exception() {
@@ skipping 73 matching lines @@
   static Failure* ReThrow(Object* exception, MessageLocation* location = NULL);
   static void ScheduleThrow(Object* exception);
   static void ReportPendingMessages();
   static Failure* ThrowIllegalOperation();
 
   // Promote a scheduled exception to pending. Asserts has_scheduled_exception.
   static Object* PromoteScheduledException();
   static void DoThrow(Object* exception,
                       MessageLocation* location,
                       const char* message);
-  static bool ShouldReportException(bool* is_caught_externally);
+  static bool ShouldReturnException(bool* is_caught_externally,
+                                    bool catchable_by_javascript);
   static void ReportUncaughtException(Handle<Object> exception,
                                       MessageLocation* location,
                                       Handle<String> stack_trace);
 
   // Attempts to compute the current source location, storing the
   // result in the target out parameter.
   static void ComputeLocation(MessageLocation* target);
 
   // Override command line flag.
   static void TraceException(bool flag);
 
   // Out of resource exception helpers.
   static Failure* StackOverflow();
+  static Failure* TerminateExecution();
 
   // Administration
   static void Initialize();
   static void TearDown();
   static void Iterate(ObjectVisitor* v);
   static void Iterate(ObjectVisitor* v, ThreadLocalTop* t);
   static char* Iterate(ObjectVisitor* v, char* t);
 
   // Returns the global object of the current context. It could be
   // a builtin object, or a js global object.
@@ skipping 124 matching lines @@
 
 class ExecutionAccess BASE_EMBEDDED {
  public:
   ExecutionAccess();
   ~ExecutionAccess();
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_TOP_H_