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

runtime/vm/stub_code.cc

 // Copyright (c) 2012, 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/stub_code.h"
 
 #include "platform/assert.h"
 #include "platform/globals.h"
 #include "vm/assembler.h"
 #include "vm/disassembler.h"
@@ skipping 85 matching lines @@
 
 
 bool StubCode::InInvocationStubForIsolate(Isolate* isolate, uword pc) {
   StubCode* stub_code = isolate->stub_code();
   uword entry = stub_code->InvokeDartCodeEntryPoint();
   uword size = stub_code->InvokeDartCodeSize();
   return (pc >= entry) && (pc < (entry + size));
 }
 
 
+bool StubCode::InJumpToExceptionHandlerStub(uword pc) {
+  uword entry = StubCode::JumpToExceptionHandlerEntryPoint();
+  uword size = StubCode::JumpToExceptionHandlerSize();
+  return (pc >= entry) && (pc < (entry + size));
+}
+
+
 RawCode* StubCode::GetAllocationStubForClass(const Class& cls) {
   Isolate* isolate = Isolate::Current();
   const Error& error = Error::Handle(isolate, cls.EnsureIsFinalized(isolate));
   ASSERT(error.IsNull());
   Code& stub = Code::Handle(isolate, cls.allocation_stub());
   if (stub.IsNull()) {
     Assembler assembler;
     const char* name = cls.ToCString();
     StubCode::GenerateAllocationStubForClass(&assembler, cls);
     stub ^= Code::FinalizeCode(name, &assembler);
@@ skipping 40 matching lines @@
   Isolate* isolate = Isolate::Current();
   if ((isolate != NULL) && (isolate->stub_code() != NULL)) {
     STUB_CODE_LIST(STUB_CODE_TESTER);
   }
 #undef VM_STUB_CODE_TESTER
 #undef STUB_CODE_TESTER
   return NULL;
 }
 
 }  // namespace dart