Implement prologue weak persistent handles.

runtime/vm/object.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/object.h"
 
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/bootstrap.h"
@@ skipping 7886 matching lines @@
   return String::ToCString();
 }
 
 
 static void AddFinalizer(const Object& referent,
                          void* peer,
                          Dart_WeakPersistentHandleFinalizer callback) {
   ASSERT(callback != NULL);
   ApiState* state = Isolate::Current()->api_state();
   ASSERT(state != NULL);
-  WeakPersistentHandle* weak_ref =
+  FinalizablePersistentHandle* weak_ref =
       state->weak_persistent_handles().AllocateHandle();
   weak_ref->set_raw(referent);
   weak_ref->set_peer(peer);
   weak_ref->set_callback(callback);
 }
 
 
 RawExternalOneByteString* ExternalOneByteString::New(
     const uint8_t* data,
     intptr_t len,
@@ skipping 18 matching lines @@
     result.SetExternalData(external_data);
   }
   AddFinalizer(result, external_data, ExternalOneByteString::Finalize);
   return result.raw();
 }
 
 
 static void DeleteWeakPersistentHandle(Dart_Handle handle) {
   ApiState* state = Isolate::Current()->api_state();
   ASSERT(state != NULL);
-  WeakPersistentHandle* weak_ref =
-      reinterpret_cast<WeakPersistentHandle*>(handle);
+  FinalizablePersistentHandle* weak_ref =
+      reinterpret_cast<FinalizablePersistentHandle*>(handle);
   ASSERT(state->IsValidWeakPersistentHandle(handle));
   state->weak_persistent_handles().FreeHandle(weak_ref);
 }
 
 
 void ExternalOneByteString::Finalize(Dart_Handle handle, void* peer) {
   delete reinterpret_cast<ExternalStringData<uint8_t>*>(peer);
   DeleteWeakPersistentHandle(handle);
 }
 
@@ skipping 811 matching lines @@
   const String& str = String::Handle(pattern());
   const char* format = "JSRegExp: pattern=%s flags=%s";
   intptr_t len = OS::SNPrint(NULL, 0, format, str.ToCString(), Flags());
   char* chars = reinterpret_cast<char*>(
       Isolate::Current()->current_zone()->Allocate(len + 1));
   OS::SNPrint(chars, (len + 1), format, str.ToCString(), Flags());
   return chars;
 }
 
 }  // namespace dart