Add support for interrupting an isolate in the vm. Interrupts are

runtime/vm/stub_code_x64.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/native_entry.h"
 #include "vm/stub_code.h"
 
@@ skipping 154 matching lines @@
   __ LeaveFrame();
   __ ret();
 }
 
 
 void StubCode::GenerateCallStaticFunctionStub(Assembler* assembler) {
   __ Unimplemented("CallStaticFunction stub");
 }
 
 
-void StubCode::GenerateStackOverflowStub(Assembler* assembler) {
-  __ Unimplemented("StackOverflow stub");
-}
-
-
 void StubCode::GenerateOptimizeInvokedFunctionStub(Assembler* assembler) {
   __ Unimplemented("OptimizeInvokedFunction stub");
 }
 
 
 void StubCode::GenerateFixCallersTargetStub(Assembler* assembler) {
   __ Unimplemented("FixCallersTarget stub");
 }
 
 
@@ skipping 170 matching lines @@
 }
 
 
 void StubCode::GenerateBreakpointDynamicStub(Assembler* assembler) {
   __ Unimplemented("BreakpointDynamic stub");
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64