Add support for forceful termination of JavaScript execution.

src/execution.cc

 // 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 138 matching lines @@
   catcher.SetVerbose(false);
   catcher.SetCaptureMessage(false);
 
   Handle<Object> result = Invoke(false, func, receiver, argc, args,
                                  caught_exception);
 
   if (*caught_exception) {
     ASSERT(catcher.HasCaught());
     ASSERT(Top::has_pending_exception());
     ASSERT(Top::external_caught_exception());
-    Top::optional_reschedule_exception(true);
+    bool is_bottom_call = HandleScopeImplementer::instance()->CallDepthIsZero();
+    Top::OptionalRescheduleException(is_bottom_call, true);
     result = v8::Utils::OpenHandle(*catcher.Exception());
   }
 
   ASSERT(!Top::has_pending_exception());
   ASSERT(!Top::external_caught_exception());
   return result;
 }
 
 
 Handle<Object> Execution::GetFunctionDelegate(Handle<Object> object) {
@@ skipping 151 matching lines @@
 }
 
 
 void StackGuard::Preempt() {
   ExecutionAccess access;
   thread_local_.interrupt_flags_ |= PREEMPT;
   set_limits(kInterruptLimit, access);
 }
 
 
+bool StackGuard::IsTerminateExecution() {
+  ExecutionAccess access;
+  return thread_local_.interrupt_flags_ & TERMINATE;
+}
+
+
+void StackGuard::TerminateExecution() {
+  ExecutionAccess access;
+  thread_local_.interrupt_flags_ |= TERMINATE;
+  set_limits(kInterruptLimit, access);
+}
+
+
 #ifdef ENABLE_DEBUGGER_SUPPORT
 bool StackGuard::IsDebugBreak() {
   ExecutionAccess access;
   return thread_local_.interrupt_flags_ & DEBUGBREAK;
 }
 
 
 void StackGuard::DebugBreak() {
   ExecutionAccess access;
   thread_local_.interrupt_flags_ |= DEBUGBREAK;
@@ skipping 290 matching lines @@
 }
 #endif
 
 Object* Execution::HandleStackGuardInterrupt() {
 #ifdef ENABLE_DEBUGGER_SUPPORT
   if (StackGuard::IsDebugBreak() || StackGuard::IsDebugCommand()) {
     DebugBreakHelper();
   }
 #endif
   if (StackGuard::IsPreempted()) RuntimePreempt();
+  if (StackGuard::IsTerminateExecution()) {
+    StackGuard::Continue(TERMINATE);
+    return Top::TerminateExecution();
+  }
   if (StackGuard::IsInterrupted()) {
     // interrupt
     StackGuard::Continue(INTERRUPT);
     return Top::StackOverflow();
   }
   return Heap::undefined_value();
 }
 
 // --- G C   E x t e n s i o n ---
 
@@ skipping 10 matching lines @@
   // All allocation spaces other than NEW_SPACE have the same effect.
   Heap::CollectAllGarbage();
   return v8::Undefined();
 }
 
 
 static GCExtension kGCExtension;
 v8::DeclareExtension kGCExtensionDeclaration(&kGCExtension);
 
 } }  // namespace v8::internal