Enable VM service inside Dartium Renderer processes

Source/bindings/dart/DartServiceInternal.cpp

+// Copyright (c) 2013, 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.
+
+// Each #include line has NOLINT because we cannot include "config.h" in
+// this file because it conflicts with Dart VM internals.
+
+// TODO(johnmccutchan): Expose these methods to the embedder API so

[Jacob, 2013/12/05 22:56:12]

the webkit style is to avoid TODO with a user name.
switch to 
FIXME and add a bug#

[Cutch, 2013/12/05 23:09:37]

Done.

+// this file can be removed.
+#include "bindings/dart/DartServiceInternal.h"  // NOLINT.
+#include "bindings/dart/DartService.h"  // NOLINT.
+
+// Map from Dartium to Dart VM.
+#if defined(_DEBUG)
+#define DEBUG
+#endif
+
+#include "vm/dart_api_impl.h"  // NOLINT.
+#include "vm/dart_api_state.h"  // NOLINT.
+#include "vm/dart_entry.h"  // NOLINT.
+#include "vm/isolate.h"  // NOLINT.
+#include "vm/message.h"  // NOLINT.
+#include "vm/native_arguments.h"  // NOLINT.
+#include "vm/native_entry.h"  // NOLINT.
+#include "vm/object.h"  // NOLINT.
+#include "vm/port.h"  // NOLINT.
+#include "vm/snapshot.h"  // NOLINT.
+
+
+namespace WebCore {
+
+
+Dart_Port DartServiceInternal::GetPortIdFromPort(Dart_Handle port)
+{
+    using namespace dart;
+    Isolate* isolate = Isolate::Current();
+    DARTSCOPE(isolate);
+    Instance& instance = Instance::Handle();
+    instance ^= Api::UnwrapHandle(port);
+    const Object& idObj = Object::Handle(DartLibraryCalls::PortGetId(instance));
+    if (idObj.IsError()) {
+        return ILLEGAL_PORT;
+    }
+    Integer& id = Integer::Handle();
+    id ^= idObj.raw();
+    return static_cast<Dart_Port>(id.AsInt64Value());
+}
+
+
+static uint8_t* allocator(uint8_t* ptr, intptr_t oldSize, intptr_t newSize)
+{
+    void* newPtr = realloc(reinterpret_cast<void*>(ptr), newSize);
+    return reinterpret_cast<uint8_t*>(newPtr);
+}
+
+
+static bool DartSendServiceMessage(Dart_Handle targetPort, Dart_Handle replyPort, Dart_Handle message)
+{
+    using namespace dart;
+    Isolate* isolate = Isolate::Current();
+    DARTSCOPE(isolate);
+    Dart_Port spId = DartServiceInternal::GetPortIdFromPort(targetPort);
+    if (spId == ILLEGAL_PORT) {
+        return false;
+    }
+    Dart_Port rpId = DartServiceInternal::GetPortIdFromPort(replyPort);
+    if (rpId == ILLEGAL_PORT) {
+        return false;
+    }
+
+    // Serialize message.
+    Object& msg = Object::Handle(Api::UnwrapHandle(message));
+    uint8_t* data = 0;
+    MessageWriter writer(&data, &allocator);
+    writer.WriteMessage(msg);
+
+    PortMap::PostMessage(new Message(spId, rpId, data, writer.BytesWritten(), Message::kOOBPriority));
+    return true;
+}
+
+
+void DartServiceInternal::PostOOB(Dart_Handle targetPort, Dart_Handle replyPort, Dart_Handle message)
+{
+    bool r = DartSendServiceMessage(targetPort, replyPort, message);
+    ASSERT(r);
+}
+
+}