Add m-esr52 at 52.6.0

1 files changed, 1393 insertions, 0 deletions

diff --git a/dom/plugins/ipc/PluginScriptableObjectParent.cpp b/dom/plugins/ipc/PluginScriptableObjectParent.cpp
new file mode 100644
index 000000000..6e385b98c
--- /dev/null
+++ b/dom/plugins/ipc/PluginScriptableObjectParent.cpp
@@ -0,0 +1,1393 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=2 et :
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "PluginScriptableObjectParent.h"
+
+#include "jsapi.h"
+#include "mozilla/DebugOnly.h"
+#include "mozilla/dom/ScriptSettings.h"
+#include "mozilla/plugins/PluginTypes.h"
+#include "mozilla/Unused.h"
+#include "nsNPAPIPlugin.h"
+#include "PluginAsyncSurrogate.h"
+#include "PluginScriptableObjectUtils.h"
+
+using namespace mozilla;
+using namespace mozilla::plugins;
+using namespace mozilla::plugins::parent;
+
+/**
+ * NPIdentifiers in the chrome process are stored as jsids. The difficulty is in
+ * ensuring that string identifiers are rooted without pinning them all. We
+ * assume that all NPIdentifiers passed into nsJSNPRuntime will not be used
+ * outside the scope of the NPAPI call (i.e., they won't be stored in the
+ * heap). Rooting is done using the StackIdentifier class, which roots the
+ * identifier via RootedId.
+ *
+ * This system does not allow jsids to be moved, as would be needed for
+ * generational or compacting GC. When Firefox implements a moving GC for
+ * strings, we will need to ensure that no movement happens while NPAPI code is
+ * on the stack: although StackIdentifier roots all identifiers used, the GC has
+ * no way to know that a jsid cast to an NPIdentifier needs to be fixed up if it
+ * is moved.
+ */
+
+class MOZ_STACK_CLASS StackIdentifier
+{
+public:
+  explicit StackIdentifier(const PluginIdentifier& aIdentifier,
+                           bool aAtomizeAndPin = false);
+
+  bool Failed() const { return mFailed; }
+  NPIdentifier ToNPIdentifier() const { return mIdentifier; }
+
+private:
+  bool mFailed;
+  NPIdentifier mIdentifier;
+  AutoSafeJSContext mCx;
+  JS::RootedId mId;
+};
+
+StackIdentifier::StackIdentifier(const PluginIdentifier& aIdentifier, bool aAtomizeAndPin)
+: mFailed(false),
+  mId(mCx)
+{
+  if (aIdentifier.type() == PluginIdentifier::TnsCString) {
+    // We don't call _getstringidentifier because we may not want to intern the string.
+    NS_ConvertUTF8toUTF16 utf16name(aIdentifier.get_nsCString());
+    JS::RootedString str(mCx, JS_NewUCStringCopyN(mCx, utf16name.get(), utf16name.Length()));
+    if (!str) {
+      NS_ERROR("Id can't be allocated");
+      mFailed = true;
+      return;
+    }
+    if (aAtomizeAndPin) {
+      str = JS_AtomizeAndPinJSString(mCx, str);
+      if (!str) {
+        NS_ERROR("Id can't be allocated");
+        mFailed = true;
+        return;
+      }
+    }
+    if (!JS_StringToId(mCx, str, &mId)) {
+      NS_ERROR("Id can't be allocated");
+      mFailed = true;
+      return;
+    }
+    mIdentifier = JSIdToNPIdentifier(mId);
+    return;
+  }
+
+  mIdentifier = mozilla::plugins::parent::_getintidentifier(aIdentifier.get_int32_t());
+}
+
+static bool
+FromNPIdentifier(NPIdentifier aIdentifier, PluginIdentifier* aResult)
+{
+  if (mozilla::plugins::parent::_identifierisstring(aIdentifier)) {
+    nsCString string;
+    NPUTF8* chars =
+      mozilla::plugins::parent::_utf8fromidentifier(aIdentifier);
+    if (!chars) {
+      return false;
+    }
+    string.Adopt(chars);
+    *aResult = PluginIdentifier(string);
+    return true;
+  }
+  else {
+    int32_t intval = mozilla::plugins::parent::_intfromidentifier(aIdentifier);
+    *aResult = PluginIdentifier(intval);
+    return true;
+  }
+}
+
+namespace {
+
+inline void
+ReleaseVariant(NPVariant& aVariant,
+               PluginInstanceParent* aInstance)
+{
+  PushSurrogateAcceptCalls acceptCalls(aInstance);
+  const NPNetscapeFuncs* npn = GetNetscapeFuncs(aInstance);
+  if (npn) {
+    npn->releasevariantvalue(&aVariant);
+  }
+}
+
+} // namespace
+
+// static
+NPObject*
+PluginScriptableObjectParent::ScriptableAllocate(NPP aInstance,
+                                                 NPClass* aClass)
+{
+  if (aClass != GetClass()) {
+    NS_ERROR("Huh?! Wrong class!");
+    return nullptr;
+  }
+
+  return new ParentNPObject();
+}
+
+// static
+void
+PluginScriptableObjectParent::ScriptableInvalidate(NPObject* aObject)
+{
+  if (aObject->_class != GetClass()) {
+    NS_ERROR("Don't know what kind of object this is!");
+    return;
+  }
+
+  ParentNPObject* object = reinterpret_cast<ParentNPObject*>(aObject);
+  if (object->invalidated) {
+    // This can happen more than once, and is just fine.
+    return;
+  }
+
+  object->invalidated = true;
+
+  // |object->parent| may be null already if the instance has gone away.
+  if (object->parent && !object->parent->CallInvalidate()) {
+    NS_ERROR("Failed to send message!");
+  }
+}
+
+// static
+void
+PluginScriptableObjectParent::ScriptableDeallocate(NPObject* aObject)
+{
+  if (aObject->_class != GetClass()) {
+    NS_ERROR("Don't know what kind of object this is!");
+    return;
+  }
+
+  ParentNPObject* object = reinterpret_cast<ParentNPObject*>(aObject);
+
+  if (object->asyncWrapperCount > 0) {
+    // In this case we should just drop the refcount to the asyncWrapperCount
+    // instead of deallocating because there are still some async wrappers
+    // out there that are referencing this object.
+    object->referenceCount = object->asyncWrapperCount;
+    return;
+  }
+
+  PluginScriptableObjectParent* actor = object->parent;
+  if (actor) {
+    NS_ASSERTION(actor->Type() == Proxy, "Bad type!");
+    actor->DropNPObject();
+  }
+
+  delete object;
+}
+
+// static
+bool
+PluginScriptableObjectParent::ScriptableHasMethod(NPObject* aObject,
+                                                  NPIdentifier aName)
+{
+  if (aObject->_class != GetClass()) {
+    NS_ERROR("Don't know what kind of object this is!");
+    return false;
+  }
+
+  ParentNPObject* object = reinterpret_cast<ParentNPObject*>(aObject);
+  if (object->invalidated) {
+    NS_WARNING("Calling method on an invalidated object!");
+    return false;
+  }
+
+  ProtectedActor<PluginScriptableObjectParent> actor(object->parent);
+  if (!actor) {
+    return false;
+  }
+
+  PluginIdentifier identifier;
+  if (!FromNPIdentifier(aName, &identifier)) {
+    return false;
+  }
+
+  NS_ASSERTION(actor->Type() == Proxy, "Bad type!");
+
+  bool result;
+  if (!actor->CallHasMethod(identifier, &result)) {
+    NS_WARNING("Failed to send message!");
+    return false;
+  }
+
+  return result;
+}
+
+// static
+bool
+PluginScriptableObjectParent::ScriptableInvoke(NPObject* aObject,
+                                               NPIdentifier aName,
+                                               const NPVariant* aArgs,
+                                               uint32_t aArgCount,
+                                               NPVariant* aResult)
+{
+  if (aObject->_class != GetClass()) {
+    NS_ERROR("Don't know what kind of object this is!");
+    return false;
+  }
+
+  ParentNPObject* object = reinterpret_cast<ParentNPObject*>(aObject);
+  if (object->invalidated) {
+    NS_WARNING("Calling method on an invalidated object!");
+    return false;
+  }
+
+  ProtectedActor<PluginScriptableObjectParent> actor(object->parent);
+  if (!actor) {
+    return false;
+  }
+
+  PluginIdentifier identifier;
+  if (!FromNPIdentifier(aName, &identifier)) {
+    return false;
+  }
+
+  NS_ASSERTION(actor->Type() == Proxy, "Bad type!");
+
+  ProtectedVariantArray args(aArgs, aArgCount, actor->GetInstance());
+  if (!args.IsOk()) {
+    NS_ERROR("Failed to convert arguments!");
+    return false;
+  }
+
+  Variant remoteResult;
+  bool success;
+  if (!actor->CallInvoke(identifier, args, &remoteResult,
+                         &success)) {
+    NS_WARNING("Failed to send message!");
+    return false;
+  }
+
+  if (!success) {
+    return false;
+  }
+
+  if (!ConvertToVariant(remoteResult, *aResult, actor->GetInstance())) {
+    NS_WARNING("Failed to convert result!");
+    return false;
+  }
+  return true;
+}
+
+// static
+bool
+PluginScriptableObjectParent::ScriptableInvokeDefault(NPObject* aObject,
+                                                      const NPVariant* aArgs,
+                                                      uint32_t aArgCount,
+                                                      NPVariant* aResult)
+{
+  if (aObject->_class != GetClass()) {
+    NS_ERROR("Don't know what kind of object this is!");
+    return false;
+  }
+
+  ParentNPObject* object = reinterpret_cast<ParentNPObject*>(aObject);
+  if (object->invalidated) {
+    NS_WARNING("Calling method on an invalidated object!");
+    return false;
+  }
+
+  ProtectedActor<PluginScriptableObjectParent> actor(object->parent);
+  if (!actor) {
+    return false;
+  }
+
+  NS_ASSERTION(actor->Type() == Proxy, "Bad type!");
+
+  ProtectedVariantArray args(aArgs, aArgCount, actor->GetInstance());
+  if (!args.IsOk()) {
+    NS_ERROR("Failed to convert arguments!");
+    return false;
+  }
+
+  Variant remoteResult;
+  bool success;
+  if (!actor->CallInvokeDefault(args, &remoteResult, &success)) {
+    NS_WARNING("Failed to send message!");
+    return false;
+  }
+
+  if (!success) {
+    return false;
+  }
+
+  if (!ConvertToVariant(remoteResult, *aResult, actor->GetInstance())) {
+    NS_WARNING("Failed to convert result!");
+    return false;
+  }
+  return true;
+}
+
+// static
+bool
+PluginScriptableObjectParent::ScriptableHasProperty(NPObject* aObject,
+                                                    NPIdentifier aName)
+{
+  if (aObject->_class != GetClass()) {
+    NS_ERROR("Don't know what kind of object this is!");
+    return false;
+  }
+
+  ParentNPObject* object = reinterpret_cast<ParentNPObject*>(aObject);
+  if (object->invalidated) {
+    NS_WARNING("Calling method on an invalidated object!");
+    return false;
+  }
+
+  ProtectedActor<PluginScriptableObjectParent> actor(object->parent);
+  if (!actor) {
+    return false;
+  }
+
+  PluginIdentifier identifier;
+  if (!FromNPIdentifier(aName, &identifier)) {
+    return false;
+  }
+
+  NS_ASSERTION(actor->Type() == Proxy, "Bad type!");
+
+  bool result;
+  if (!actor->CallHasProperty(identifier, &result)) {
+    NS_WARNING("Failed to send message!");
+    return false;
+  }
+
+  return result;
+}
+
+// static
+bool
+PluginScriptableObjectParent::ScriptableGetProperty(NPObject* aObject,
+                                                    NPIdentifier aName,
+                                                    NPVariant* aResult)
+{
+  // See GetPropertyHelper below.
+  NS_NOTREACHED("Shouldn't ever call this directly!");
+  return false;
+}
+
+// static
+bool
+PluginScriptableObjectParent::ScriptableSetProperty(NPObject* aObject,
+                                                    NPIdentifier aName,
+                                                    const NPVariant* aValue)
+{
+  if (aObject->_class != GetClass()) {
+    NS_ERROR("Don't know what kind of object this is!");
+    return false;
+  }
+
+  ParentNPObject* object = reinterpret_cast<ParentNPObject*>(aObject);
+  if (object->invalidated) {
+    NS_WARNING("Calling method on an invalidated object!");
+    return false;
+  }
+
+  ProtectedActor<PluginScriptableObjectParent> actor(object->parent);
+  if (!actor) {
+    return false;
+  }
+
+  PluginIdentifier identifier;
+  if (!FromNPIdentifier(aName, &identifier)) {
+    return false;
+  }
+
+  NS_ASSERTION(actor->Type() == Proxy, "Bad type!");
+
+  ProtectedVariant value(*aValue, actor->GetInstance());
+  if (!value.IsOk()) {
+    NS_WARNING("Failed to convert variant!");
+    return false;
+  }
+
+  bool success;
+  if (!actor->CallSetProperty(identifier, value, &success)) {
+    NS_WARNING("Failed to send message!");
+    return false;
+  }
+
+  return success;
+}
+
+// static
+bool
+PluginScriptableObjectParent::ScriptableRemoveProperty(NPObject* aObject,
+                                                       NPIdentifier aName)
+{
+  if (aObject->_class != GetClass()) {
+    NS_ERROR("Don't know what kind of object this is!");
+    return false;
+  }
+
+  ParentNPObject* object = reinterpret_cast<ParentNPObject*>(aObject);
+  if (object->invalidated) {
+    NS_WARNING("Calling method on an invalidated object!");
+    return false;
+  }
+
+  ProtectedActor<PluginScriptableObjectParent> actor(object->parent);
+  if (!actor) {
+    return false;
+  }
+
+  PluginIdentifier identifier;
+  if (!FromNPIdentifier(aName, &identifier)) {
+    return false;
+  }
+
+  NS_ASSERTION(actor->Type() == Proxy, "Bad type!");
+
+  bool success;
+  if (!actor->CallRemoveProperty(identifier, &success)) {
+    NS_WARNING("Failed to send message!");
+    return false;
+  }
+
+  return success;
+}
+
+// static
+bool
+PluginScriptableObjectParent::ScriptableEnumerate(NPObject* aObject,
+                                                  NPIdentifier** aIdentifiers,
+                                                  uint32_t* aCount)
+{
+  if (aObject->_class != GetClass()) {
+    NS_ERROR("Don't know what kind of object this is!");
+    return false;
+  }
+
+  ParentNPObject* object = reinterpret_cast<ParentNPObject*>(aObject);
+  if (object->invalidated) {
+    NS_WARNING("Calling method on an invalidated object!");
+    return false;
+  }
+
+  ProtectedActor<PluginScriptableObjectParent> actor(object->parent);
+  if (!actor) {
+    return false;
+  }
+
+  NS_ASSERTION(actor->Type() == Proxy, "Bad type!");
+
+  const NPNetscapeFuncs* npn = GetNetscapeFuncs(aObject);
+  if (!npn) {
+    NS_ERROR("No netscape funcs!");
+    return false;
+  }
+
+  AutoTArray<PluginIdentifier, 10> identifiers;
+  bool success;
+  if (!actor->CallEnumerate(&identifiers, &success)) {
+    NS_WARNING("Failed to send message!");
+    return false;
+  }
+
+  if (!success) {
+    return false;
+  }
+
+  *aCount = identifiers.Length();
+  if (!*aCount) {
+    *aIdentifiers = nullptr;
+    return true;
+  }
+
+  *aIdentifiers = (NPIdentifier*)npn->memalloc(*aCount * sizeof(NPIdentifier));
+  if (!*aIdentifiers) {
+    NS_ERROR("Out of memory!");
+    return false;
+  }
+
+  for (uint32_t index = 0; index < *aCount; index++) {
+    // We pin the ID to avoid a GC hazard here. This could probably be fixed
+    // if the interface with nsJSNPRuntime were smarter.
+    StackIdentifier stackID(identifiers[index], true /* aAtomizeAndPin */);
+    if (stackID.Failed()) {
+      return false;
+    }
+    (*aIdentifiers)[index] = stackID.ToNPIdentifier();
+  }
+  return true;
+}
+
+// static
+bool
+PluginScriptableObjectParent::ScriptableConstruct(NPObject* aObject,
+                                                  const NPVariant* aArgs,
+                                                  uint32_t aArgCount,
+                                                  NPVariant* aResult)
+{
+  if (aObject->_class != GetClass()) {
+    NS_ERROR("Don't know what kind of object this is!");
+    return false;
+  }
+
+  ParentNPObject* object = reinterpret_cast<ParentNPObject*>(aObject);
+  if (object->invalidated) {
+    NS_WARNING("Calling method on an invalidated object!");
+    return false;
+  }
+
+  ProtectedActor<PluginScriptableObjectParent> actor(object->parent);
+  if (!actor) {
+    return false;
+  }
+
+  NS_ASSERTION(actor->Type() == Proxy, "Bad type!");
+
+  ProtectedVariantArray args(aArgs, aArgCount, actor->GetInstance());
+  if (!args.IsOk()) {
+    NS_ERROR("Failed to convert arguments!");
+    return false;
+  }
+
+  Variant remoteResult;
+  bool success;
+  if (!actor->CallConstruct(args, &remoteResult, &success)) {
+    NS_WARNING("Failed to send message!");
+    return false;
+  }
+
+  if (!success) {
+    return false;
+  }
+
+  if (!ConvertToVariant(remoteResult, *aResult, actor->GetInstance())) {
+    NS_WARNING("Failed to convert result!");
+    return false;
+  }
+  return true;
+}
+
+const NPClass PluginScriptableObjectParent::sNPClass = {
+  NP_CLASS_STRUCT_VERSION,
+  PluginScriptableObjectParent::ScriptableAllocate,
+  PluginScriptableObjectParent::ScriptableDeallocate,
+  PluginScriptableObjectParent::ScriptableInvalidate,
+  PluginScriptableObjectParent::ScriptableHasMethod,
+  PluginScriptableObjectParent::ScriptableInvoke,
+  PluginScriptableObjectParent::ScriptableInvokeDefault,
+  PluginScriptableObjectParent::ScriptableHasProperty,
+  PluginScriptableObjectParent::ScriptableGetProperty,
+  PluginScriptableObjectParent::ScriptableSetProperty,
+  PluginScriptableObjectParent::ScriptableRemoveProperty,
+  PluginScriptableObjectParent::ScriptableEnumerate,
+  PluginScriptableObjectParent::ScriptableConstruct
+};
+
+PluginScriptableObjectParent::PluginScriptableObjectParent(
+                                                     ScriptableObjectType aType)
+: mInstance(nullptr),
+  mObject(nullptr),
+  mProtectCount(0),
+  mType(aType)
+{
+}
+
+PluginScriptableObjectParent::~PluginScriptableObjectParent()
+{
+  if (mObject) {
+    if (mObject->_class == GetClass()) {
+      NS_ASSERTION(mType == Proxy, "Wrong type!");
+      static_cast<ParentNPObject*>(mObject)->parent = nullptr;
+    }
+    else {
+      NS_ASSERTION(mType == LocalObject, "Wrong type!");
+      GetInstance()->GetNPNIface()->releaseobject(mObject);
+    }
+  }
+}
+
+void
+PluginScriptableObjectParent::InitializeProxy()
+{
+  NS_ASSERTION(mType == Proxy, "Bad type!");
+  NS_ASSERTION(!mObject, "Calling Initialize more than once!");
+
+  mInstance = static_cast<PluginInstanceParent*>(Manager());
+  NS_ASSERTION(mInstance, "Null manager?!");
+
+  NPObject* object = CreateProxyObject();
+  NS_ASSERTION(object, "Failed to create object!");
+
+  if (!mInstance->RegisterNPObjectForActor(object, this)) {
+    NS_ERROR("Out of memory?");
+  }
+
+  mObject = object;
+}
+
+void
+PluginScriptableObjectParent::InitializeLocal(NPObject* aObject)
+{
+  NS_ASSERTION(mType == LocalObject, "Bad type!");
+  NS_ASSERTION(!(mInstance && mObject), "Calling Initialize more than once!");
+
+  mInstance = static_cast<PluginInstanceParent*>(Manager());
+  NS_ASSERTION(mInstance, "Null manager?!");
+
+  mInstance->GetNPNIface()->retainobject(aObject);
+
+  NS_ASSERTION(!mProtectCount, "Should be zero!");
+  mProtectCount++;
+
+  if (!mInstance->RegisterNPObjectForActor(aObject, this)) {
+    NS_ERROR("Out of memory?");
+  }
+
+  mObject = aObject;
+}
+
+NPObject*
+PluginScriptableObjectParent::CreateProxyObject()
+{
+  NS_ASSERTION(mInstance, "Must have an instance!");
+  NS_ASSERTION(mType == Proxy, "Shouldn't call this for non-proxy object!");
+
+  PushSurrogateAcceptCalls acceptCalls(mInstance);
+  const NPNetscapeFuncs* npn = GetNetscapeFuncs(mInstance);
+
+  NPObject* npobject = npn->createobject(mInstance->GetNPP(),
+                                         const_cast<NPClass*>(GetClass()));
+  NS_ASSERTION(npobject, "Failed to create object?!");
+  NS_ASSERTION(npobject->_class == GetClass(), "Wrong kind of object!");
+  NS_ASSERTION(npobject->referenceCount == 1, "Some kind of live object!");
+
+  ParentNPObject* object = static_cast<ParentNPObject*>(npobject);
+  NS_ASSERTION(!object->invalidated, "Bad object!");
+  NS_ASSERTION(!object->parent, "Bad object!");
+
+  // We don't want to have the actor own this object but rather let the object
+  // own this actor. Set the reference count to 0 here so that when the object
+  // dies we will send the destructor message to the child.
+  object->referenceCount = 0;
+  NS_LOG_RELEASE(object, 0, "BrowserNPObject");
+
+  object->parent = const_cast<PluginScriptableObjectParent*>(this);
+  return object;
+}
+
+bool
+PluginScriptableObjectParent::ResurrectProxyObject()
+{
+  NS_ASSERTION(mInstance, "Must have an instance already!");
+  NS_ASSERTION(!mObject, "Should not have an object already!");
+  NS_ASSERTION(mType == Proxy, "Shouldn't call this for non-proxy object!");
+
+  InitializeProxy();
+  NS_ASSERTION(mObject, "Initialize failed!");
+
+  if (!SendProtect()) {
+    NS_WARNING("Failed to send message!");
+    return false;
+  }
+
+  return true;
+}
+
+NPObject*
+PluginScriptableObjectParent::GetObject(bool aCanResurrect)
+{
+  if (!mObject && aCanResurrect && !ResurrectProxyObject()) {
+    NS_ERROR("Null object!");
+    return nullptr;
+  }
+  return mObject;
+}
+
+void
+PluginScriptableObjectParent::Protect()
+{
+  NS_ASSERTION(mObject, "No object!");
+  NS_ASSERTION(mProtectCount >= 0, "Negative protect count?!");
+
+  if (mType == LocalObject) {
+    ++mProtectCount;
+  }
+}
+
+void
+PluginScriptableObjectParent::Unprotect()
+{
+  NS_ASSERTION(mObject, "No object!");
+  NS_ASSERTION(mProtectCount >= 0, "Negative protect count?!");
+
+  if (mType == LocalObject) {
+    if (--mProtectCount == 0) {
+      Unused << PluginScriptableObjectParent::Send__delete__(this);
+    }
+  }
+}
+
+void
+PluginScriptableObjectParent::DropNPObject()
+{
+  NS_ASSERTION(mObject, "Invalidated object!");
+  NS_ASSERTION(mObject->_class == GetClass(), "Wrong type of object!");
+  NS_ASSERTION(mType == Proxy, "Shouldn't call this for non-proxy object!");
+
+  // We think we're about to be deleted, but we could be racing with the other
+  // process.
+  PluginInstanceParent* instance = GetInstance();
+  NS_ASSERTION(instance, "Must have an instance!");
+
+  instance->UnregisterNPObject(mObject);
+  mObject = nullptr;
+
+  Unused << SendUnprotect();
+}
+
+void
+PluginScriptableObjectParent::ActorDestroy(ActorDestroyReason aWhy)
+{
+  // Implement me! Bug 1005163
+}
+
+bool
+PluginScriptableObjectParent::AnswerHasMethod(const PluginIdentifier& aId,
+                                              bool* aHasMethod)
+{
+  if (!mObject) {
+    NS_WARNING("Calling AnswerHasMethod with an invalidated object!");
+    *aHasMethod = false;
+    return true;
+  }
+
+  NS_ASSERTION(mObject->_class != GetClass(), "Bad object type!");
+  NS_ASSERTION(mType == LocalObject, "Bad type!");
+
+  PluginInstanceParent* instance = GetInstance();
+  if (!instance) {
+    NS_ERROR("No instance?!");
+    *aHasMethod = false;
+    return true;
+  }
+
+  PushSurrogateAcceptCalls acceptCalls(instance);
+  const NPNetscapeFuncs* npn = GetNetscapeFuncs(instance);
+  if (!npn) {
+    NS_ERROR("No netscape funcs?!");
+    *aHasMethod = false;
+    return true;
+  }
+
+  StackIdentifier stackID(aId);
+  if (stackID.Failed()) {
+    *aHasMethod = false;
+    return true;
+  }
+  *aHasMethod = npn->hasmethod(instance->GetNPP(), mObject, stackID.ToNPIdentifier());
+  return true;
+}
+
+bool
+PluginScriptableObjectParent::AnswerInvoke(const PluginIdentifier& aId,
+                                           InfallibleTArray<Variant>&& aArgs,
+                                           Variant* aResult,
+                                           bool* aSuccess)
+{
+  if (!mObject) {
+    NS_WARNING("Calling AnswerInvoke with an invalidated object!");
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  NS_ASSERTION(mObject->_class != GetClass(), "Bad object type!");
+  NS_ASSERTION(mType == LocalObject, "Bad type!");
+
+  PluginInstanceParent* instance = GetInstance();
+  if (!instance) {
+    NS_ERROR("No instance?!");
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  PushSurrogateAcceptCalls acceptCalls(instance);
+  const NPNetscapeFuncs* npn = GetNetscapeFuncs(instance);
+  if (!npn) {
+    NS_ERROR("No netscape funcs?!");
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  StackIdentifier stackID(aId);
+  if (stackID.Failed()) {
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  AutoTArray<NPVariant, 10> convertedArgs;
+  uint32_t argCount = aArgs.Length();
+
+  if (!convertedArgs.SetLength(argCount, fallible)) {
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  for (uint32_t index = 0; index < argCount; index++) {
+    if (!ConvertToVariant(aArgs[index], convertedArgs[index], instance)) {
+      // Don't leak things we've already converted!
+      while (index-- > 0) {
+        ReleaseVariant(convertedArgs[index], instance);
+      }
+      *aResult = void_t();
+      *aSuccess = false;
+      return true;
+    }
+  }
+
+  NPVariant result;
+  bool success = npn->invoke(instance->GetNPP(), mObject, stackID.ToNPIdentifier(),
+                             convertedArgs.Elements(), argCount, &result);
+
+  for (uint32_t index = 0; index < argCount; index++) {
+    ReleaseVariant(convertedArgs[index], instance);
+  }
+
+  if (!success) {
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  Variant convertedResult;
+  success = ConvertToRemoteVariant(result, convertedResult, GetInstance());
+
+  DeferNPVariantLastRelease(npn, &result);
+
+  if (!success) {
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  *aResult = convertedResult;
+  *aSuccess = true;
+  return true;
+}
+
+bool
+PluginScriptableObjectParent::AnswerInvokeDefault(InfallibleTArray<Variant>&& aArgs,
+                                                  Variant* aResult,
+                                                  bool* aSuccess)
+{
+  if (!mObject) {
+    NS_WARNING("Calling AnswerInvoke with an invalidated object!");
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  NS_ASSERTION(mObject->_class != GetClass(), "Bad object type!");
+  NS_ASSERTION(mType == LocalObject, "Bad type!");
+
+  PluginInstanceParent* instance = GetInstance();
+  if (!instance) {
+    NS_ERROR("No instance?!");
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  PushSurrogateAcceptCalls acceptCalls(instance);
+  const NPNetscapeFuncs* npn = GetNetscapeFuncs(instance);
+  if (!npn) {
+    NS_ERROR("No netscape funcs?!");
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  AutoTArray<NPVariant, 10> convertedArgs;
+  uint32_t argCount = aArgs.Length();
+
+  if (!convertedArgs.SetLength(argCount, fallible)) {
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  for (uint32_t index = 0; index < argCount; index++) {
+    if (!ConvertToVariant(aArgs[index], convertedArgs[index], instance)) {
+      // Don't leak things we've already converted!
+      while (index-- > 0) {
+        ReleaseVariant(convertedArgs[index], instance);
+      }
+      *aResult = void_t();
+      *aSuccess = false;
+      return true;
+    }
+  }
+
+  NPVariant result;
+  bool success = npn->invokeDefault(instance->GetNPP(), mObject,
+                                    convertedArgs.Elements(), argCount,
+                                    &result);
+
+  for (uint32_t index = 0; index < argCount; index++) {
+    ReleaseVariant(convertedArgs[index], instance);
+  }
+
+  if (!success) {
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  Variant convertedResult;
+  success = ConvertToRemoteVariant(result, convertedResult, GetInstance());
+
+  DeferNPVariantLastRelease(npn, &result);
+
+  if (!success) {
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  *aResult = convertedResult;
+  *aSuccess = true;
+  return true;
+}
+
+bool
+PluginScriptableObjectParent::AnswerHasProperty(const PluginIdentifier& aId,
+                                                bool* aHasProperty)
+{
+  if (!mObject) {
+    NS_WARNING("Calling AnswerHasProperty with an invalidated object!");
+    *aHasProperty = false;
+    return true;
+  }
+
+  NS_ASSERTION(mObject->_class != GetClass(), "Bad object type!");
+  NS_ASSERTION(mType == LocalObject, "Bad type!");
+
+  PluginInstanceParent* instance = GetInstance();
+  if (!instance) {
+    NS_ERROR("No instance?!");
+    *aHasProperty = false;
+    return true;
+  }
+
+  PushSurrogateAcceptCalls acceptCalls(instance);
+  const NPNetscapeFuncs* npn = GetNetscapeFuncs(instance);
+  if (!npn) {
+    NS_ERROR("No netscape funcs?!");
+    *aHasProperty = false;
+    return true;
+  }
+
+  StackIdentifier stackID(aId);
+  if (stackID.Failed()) {
+    *aHasProperty = false;
+    return true;
+  }
+
+  *aHasProperty = npn->hasproperty(instance->GetNPP(), mObject,
+                                   stackID.ToNPIdentifier());
+  return true;
+}
+
+bool
+PluginScriptableObjectParent::AnswerGetParentProperty(
+                                                   const PluginIdentifier& aId,
+                                                   Variant* aResult,
+                                                   bool* aSuccess)
+{
+  if (!mObject) {
+    NS_WARNING("Calling AnswerGetProperty with an invalidated object!");
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  NS_ASSERTION(mObject->_class != GetClass(), "Bad object type!");
+  NS_ASSERTION(mType == LocalObject, "Bad type!");
+
+  PluginInstanceParent* instance = GetInstance();
+  if (!instance) {
+    NS_ERROR("No instance?!");
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  PushSurrogateAcceptCalls acceptCalls(instance);
+  const NPNetscapeFuncs* npn = GetNetscapeFuncs(instance);
+  if (!npn) {
+    NS_ERROR("No netscape funcs?!");
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  StackIdentifier stackID(aId);
+  if (stackID.Failed()) {
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  NPVariant result;
+  if (!npn->getproperty(instance->GetNPP(), mObject, stackID.ToNPIdentifier(),
+                        &result)) {
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  Variant converted;
+  if ((*aSuccess = ConvertToRemoteVariant(result, converted, instance))) {
+    DeferNPVariantLastRelease(npn, &result);
+    *aResult = converted;
+  }
+  else {
+    *aResult = void_t();
+  }
+
+  return true;
+}
+
+bool
+PluginScriptableObjectParent::AnswerSetProperty(const PluginIdentifier& aId,
+                                                const Variant& aValue,
+                                                bool* aSuccess)
+{
+  if (!mObject) {
+    NS_WARNING("Calling AnswerSetProperty with an invalidated object!");
+    *aSuccess = false;
+    return true;
+  }
+
+  NS_ASSERTION(mObject->_class != GetClass(), "Bad object type!");
+  NS_ASSERTION(mType == LocalObject, "Bad type!");
+
+  PluginInstanceParent* instance = GetInstance();
+  if (!instance) {
+    NS_ERROR("No instance?!");
+    *aSuccess = false;
+    return true;
+  }
+
+  PushSurrogateAcceptCalls acceptCalls(instance);
+  const NPNetscapeFuncs* npn = GetNetscapeFuncs(instance);
+  if (!npn) {
+    NS_ERROR("No netscape funcs?!");
+    *aSuccess = false;
+    return true;
+  }
+
+  NPVariant converted;
+  if (!ConvertToVariant(aValue, converted, instance)) {
+    *aSuccess = false;
+    return true;
+  }
+
+  StackIdentifier stackID(aId);
+  if (stackID.Failed()) {
+    *aSuccess = false;
+    return true;
+  }
+
+  if ((*aSuccess = npn->setproperty(instance->GetNPP(), mObject,
+                                    stackID.ToNPIdentifier(), &converted))) {
+    ReleaseVariant(converted, instance);
+  }
+  return true;
+}
+
+bool
+PluginScriptableObjectParent::AnswerRemoveProperty(const PluginIdentifier& aId,
+                                                   bool* aSuccess)
+{
+  if (!mObject) {
+    NS_WARNING("Calling AnswerRemoveProperty with an invalidated object!");
+    *aSuccess = false;
+    return true;
+  }
+
+  NS_ASSERTION(mObject->_class != GetClass(), "Bad object type!");
+  NS_ASSERTION(mType == LocalObject, "Bad type!");
+
+  PluginInstanceParent* instance = GetInstance();
+  if (!instance) {
+    NS_ERROR("No instance?!");
+    *aSuccess = false;
+    return true;
+  }
+
+  PushSurrogateAcceptCalls acceptCalls(instance);
+  const NPNetscapeFuncs* npn = GetNetscapeFuncs(instance);
+  if (!npn) {
+    NS_ERROR("No netscape funcs?!");
+    *aSuccess = false;
+    return true;
+  }
+
+  StackIdentifier stackID(aId);
+  if (stackID.Failed()) {
+    *aSuccess = false;
+    return true;
+  }
+
+  *aSuccess = npn->removeproperty(instance->GetNPP(), mObject,
+                                  stackID.ToNPIdentifier());
+  return true;
+}
+
+bool
+PluginScriptableObjectParent::AnswerEnumerate(InfallibleTArray<PluginIdentifier>* aProperties,
+                                              bool* aSuccess)
+{
+  if (!mObject) {
+    NS_WARNING("Calling AnswerEnumerate with an invalidated object!");
+    *aSuccess = false;
+    return true;
+  }
+
+  NS_ASSERTION(mObject->_class != GetClass(), "Bad object type!");
+  NS_ASSERTION(mType == LocalObject, "Bad type!");
+
+  PluginInstanceParent* instance = GetInstance();
+  if (!instance) {
+    NS_ERROR("No instance?!");
+    *aSuccess = false;
+    return true;
+  }
+
+  PushSurrogateAcceptCalls acceptCalls(instance);
+  const NPNetscapeFuncs* npn = GetNetscapeFuncs(instance);
+  if (!npn) {
+    NS_WARNING("No netscape funcs?!");
+    *aSuccess = false;
+    return true;
+  }
+
+  NPIdentifier* ids;
+  uint32_t idCount;
+  if (!npn->enumerate(instance->GetNPP(), mObject, &ids, &idCount)) {
+    *aSuccess = false;
+    return true;
+  }
+
+  aProperties->SetCapacity(idCount);
+
+  for (uint32_t index = 0; index < idCount; index++) {
+    PluginIdentifier id;
+    if (!FromNPIdentifier(ids[index], &id)) {
+      return false;
+    }
+    aProperties->AppendElement(id);
+  }
+
+  npn->memfree(ids);
+  *aSuccess = true;
+  return true;
+}
+
+bool
+PluginScriptableObjectParent::AnswerConstruct(InfallibleTArray<Variant>&& aArgs,
+                                              Variant* aResult,
+                                              bool* aSuccess)
+{
+  if (!mObject) {
+    NS_WARNING("Calling AnswerConstruct with an invalidated object!");
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  NS_ASSERTION(mObject->_class != GetClass(), "Bad object type!");
+  NS_ASSERTION(mType == LocalObject, "Bad type!");
+
+  PluginInstanceParent* instance = GetInstance();
+  if (!instance) {
+    NS_ERROR("No instance?!");
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  PushSurrogateAcceptCalls acceptCalls(instance);
+  const NPNetscapeFuncs* npn = GetNetscapeFuncs(instance);
+  if (!npn) {
+    NS_ERROR("No netscape funcs?!");
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  AutoTArray<NPVariant, 10> convertedArgs;
+  uint32_t argCount = aArgs.Length();
+
+  if (!convertedArgs.SetLength(argCount, fallible)) {
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  for (uint32_t index = 0; index < argCount; index++) {
+    if (!ConvertToVariant(aArgs[index], convertedArgs[index], instance)) {
+      // Don't leak things we've already converted!
+      while (index-- > 0) {
+        ReleaseVariant(convertedArgs[index], instance);
+      }
+      *aResult = void_t();
+      *aSuccess = false;
+      return true;
+    }
+  }
+
+  NPVariant result;
+  bool success = npn->construct(instance->GetNPP(), mObject,
+                                convertedArgs.Elements(), argCount, &result);
+
+  for (uint32_t index = 0; index < argCount; index++) {
+    ReleaseVariant(convertedArgs[index], instance);
+  }
+
+  if (!success) {
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  Variant convertedResult;
+  success = ConvertToRemoteVariant(result, convertedResult, instance);
+
+  DeferNPVariantLastRelease(npn, &result);
+
+  if (!success) {
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  *aSuccess = true;
+  *aResult = convertedResult;
+  return true;
+}
+
+bool
+PluginScriptableObjectParent::RecvProtect()
+{
+  NS_ASSERTION(mObject->_class != GetClass(), "Bad object type!");
+  NS_ASSERTION(mType == LocalObject, "Bad type!");
+
+  Protect();
+  return true;
+}
+
+bool
+PluginScriptableObjectParent::RecvUnprotect()
+{
+  NS_ASSERTION(mObject->_class != GetClass(), "Bad object type!");
+  NS_ASSERTION(mType == LocalObject, "Bad type!");
+
+  Unprotect();
+  return true;
+}
+
+bool
+PluginScriptableObjectParent::AnswerNPN_Evaluate(const nsCString& aScript,
+                                                 Variant* aResult,
+                                                 bool* aSuccess)
+{
+  PluginInstanceParent* instance = GetInstance();
+  if (!instance) {
+    NS_ERROR("No instance?!");
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  PushSurrogateAcceptCalls acceptCalls(instance);
+  const NPNetscapeFuncs* npn = GetNetscapeFuncs(instance);
+  if (!npn) {
+    NS_ERROR("No netscape funcs?!");
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  NPString script = { aScript.get(), aScript.Length() };
+
+  NPVariant result;
+  bool success = npn->evaluate(instance->GetNPP(), mObject, &script, &result);
+  if (!success) {
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  Variant convertedResult;
+  success = ConvertToRemoteVariant(result, convertedResult, instance);
+
+  DeferNPVariantLastRelease(npn, &result);
+
+  if (!success) {
+    *aResult = void_t();
+    *aSuccess = false;
+    return true;
+  }
+
+  *aSuccess = true;
+  *aResult = convertedResult;
+  return true;
+}
+
+bool
+PluginScriptableObjectParent::GetPropertyHelper(NPIdentifier aName,
+                                                bool* aHasProperty,
+                                                bool* aHasMethod,
+                                                NPVariant* aResult)
+{
+  NS_ASSERTION(Type() == Proxy, "Bad type!");
+
+  ParentNPObject* object = static_cast<ParentNPObject*>(mObject);
+  if (object->invalidated) {
+    NS_WARNING("Calling method on an invalidated object!");
+    return false;
+  }
+
+  PluginIdentifier identifier;
+  if (!FromNPIdentifier(aName, &identifier)) {
+    return false;
+  }
+
+  bool hasProperty, hasMethod, success;
+  Variant result;
+  if (!CallGetChildProperty(identifier, &hasProperty, &hasMethod, &result,
+                            &success)) {
+    return false;
+  }
+
+  if (!success) {
+    return false;
+  }
+
+  if (!ConvertToVariant(result, *aResult, GetInstance())) {
+    NS_WARNING("Failed to convert result!");
+    return false;
+  }
+
+  *aHasProperty = hasProperty;
+  *aHasMethod = hasMethod;
+  return true;
+}