Move some isolate state setup from C++ code to JumpToExceptionHandler stub

runtime/vm/stub_code.h

 // 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.
 
 #ifndef VM_STUB_CODE_H_
 #define VM_STUB_CODE_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 
@@ skipping 102 matching lines @@
   static void Init(Isolate* isolate);
 
   static void VisitObjectPointers(ObjectPointerVisitor* visitor);
 
   // Check if specified pc is in the dart invocation stub used for
   // transitioning into dart code.
   static bool InInvocationStub(uword pc);
 
   static bool InInvocationStubForIsolate(Isolate* isolate, uword pc);
 
+  // Check if the specified pc is in the jump to exception handler stub.
+  static bool InJumpToExceptionHandlerStub(uword pc);
+
   // Returns NULL if no stub found.
   static const char* NameOfStub(uword entry_point);
 
   // Define the shared stub code accessors.
 #define STUB_CODE_ACCESSOR(name)                                               \
   static StubEntry* name##_entry() {                                           \
     return name##_entry_;                                                      \
   }                                                                            \
   static const ExternalLabel& name##Label() {                                  \
     return name##_entry()->label();                                            \
@@ skipping 72 matching lines @@
       Assembler* assembler,
       const Register left,
       const Register right,
       const Register temp1 = kNoRegister,
       const Register temp2 = kNoRegister);
 };
 
 }  // namespace dart
 
 #endif  // VM_STUB_CODE_H_