The Tor Browser: dom/plugins/ipc/PluginScriptableObjectParent.cpp@b8a032363ba2 (annotated)

dom/plugins/ipc/PluginScriptableObjectParent.cpp@b8a032363ba2 (annotated)

dom/plugins/ipc/PluginScriptableObjectParent.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- 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 "mozilla/DebugOnly.h"
 #include "mozilla/plugins/PluginIdentifierParent.h"
 #include "mozilla/unused.h"
 #include "nsCxPusher.h"
 #include "nsNPAPIPlugin.h"
 #include "PluginScriptableObjectUtils.h"
 using namespace mozilla::plugins;
 using namespace mozilla::plugins::parent;
 namespace {
 inline void
 ReleaseVariant(NPVariant& aVariant,
                PluginInstanceParent* aInstance)
 {
   const NPNetscapeFuncs* npn = GetNetscapeFuncs(aInstance);
   if (npn) {
     npn->releasevariantvalue(&aVariant);
   }
 }
 } // anonymous 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);
   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;
   }
   PluginIdentifierParent::StackIdentifier identifier(aObject, aName);
   if (!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;
   }
   PluginIdentifierParent::StackIdentifier identifier(aObject, aName);
   if (!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;
   }
   PluginIdentifierParent::StackIdentifier identifier(aObject, aName);
   if (!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;
   }
   PluginIdentifierParent::StackIdentifier identifier(aObject, aName);
   if (!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;
   }
   PluginIdentifierParent::StackIdentifier identifier(aObject, aName);
   if (!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;
   }
   AutoInfallibleTArray<PPluginIdentifierParent*, 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++) {
     PluginIdentifierParent* id =
       static_cast<PluginIdentifierParent*>(identifiers[index]);
     (*aIdentifiers)[index] = id->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!");
   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();
 }
 bool
 PluginScriptableObjectParent::AnswerHasMethod(PPluginIdentifierParent* 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;
   }
   const NPNetscapeFuncs* npn = GetNetscapeFuncs(instance);
   if (!npn) {
     NS_ERROR("No netscape funcs?!");
     *aHasMethod = false;
     return true;
   }
   PluginIdentifierParent* id = static_cast<PluginIdentifierParent*>(aId);
   *aHasMethod = npn->hasmethod(instance->GetNPP(), mObject, id->ToNPIdentifier());
   return true;
 }
 bool
 PluginScriptableObjectParent::AnswerInvoke(PPluginIdentifierParent* aId,
                                            const 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;
   }
   const NPNetscapeFuncs* npn = GetNetscapeFuncs(instance);
   if (!npn) {
     NS_ERROR("No netscape funcs?!");
     *aResult = void_t();
     *aSuccess = false;
     return true;
   }
   AutoFallibleTArray<NPVariant, 10> convertedArgs;
   uint32_t argCount = aArgs.Length();
   if (!convertedArgs.SetLength(argCount)) {
     *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;
     }
   }
   PluginIdentifierParent* id = static_cast<PluginIdentifierParent*>(aId);
   NPVariant result;
   bool success = npn->invoke(instance->GetNPP(), mObject, id->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(const 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;
   }
   const NPNetscapeFuncs* npn = GetNetscapeFuncs(instance);
   if (!npn) {
     NS_ERROR("No netscape funcs?!");
     *aResult = void_t();
     *aSuccess = false;
     return true;
   }
   AutoFallibleTArray<NPVariant, 10> convertedArgs;
   uint32_t argCount = aArgs.Length();
   if (!convertedArgs.SetLength(argCount)) {
     *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(PPluginIdentifierParent* 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;
   }
   const NPNetscapeFuncs* npn = GetNetscapeFuncs(instance);
   if (!npn) {
     NS_ERROR("No netscape funcs?!");
     *aHasProperty = false;
     return true;
   }
   PluginIdentifierParent* id = static_cast<PluginIdentifierParent*>(aId);
   *aHasProperty = npn->hasproperty(instance->GetNPP(), mObject,
                                    id->ToNPIdentifier());
   return true;
 }
 bool
 PluginScriptableObjectParent::AnswerGetParentProperty(
                                                    PPluginIdentifierParent* 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;
   }
   const NPNetscapeFuncs* npn = GetNetscapeFuncs(instance);
   if (!npn) {
     NS_ERROR("No netscape funcs?!");
     *aResult = void_t();
     *aSuccess = false;
     return true;
   }
   PluginIdentifierParent* id = static_cast<PluginIdentifierParent*>(aId);
   NPVariant result;
   if (!npn->getproperty(instance->GetNPP(), mObject, id->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(PPluginIdentifierParent* 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;
   }
   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;
   }
   PluginIdentifierParent* id = static_cast<PluginIdentifierParent*>(aId);
   if ((*aSuccess = npn->setproperty(instance->GetNPP(), mObject,
                                     id->ToNPIdentifier(), &converted))) {
     ReleaseVariant(converted, instance);
   }
   return true;
 }
 bool
 PluginScriptableObjectParent::AnswerRemoveProperty(PPluginIdentifierParent* 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;
   }
   const NPNetscapeFuncs* npn = GetNetscapeFuncs(instance);
   if (!npn) {
     NS_ERROR("No netscape funcs?!");
     *aSuccess = false;
     return true;
   }
   PluginIdentifierParent* id = static_cast<PluginIdentifierParent*>(aId);
   *aSuccess = npn->removeproperty(instance->GetNPP(), mObject,
                                   id->ToNPIdentifier());
   return true;
 }
 bool
 PluginScriptableObjectParent::AnswerEnumerate(InfallibleTArray<PPluginIdentifierParent*>* 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;
   }
   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);
   mozilla::AutoSafeJSContext cx;
   for (uint32_t index = 0; index < idCount; index++) {
     // Because of GC hazards, all identifiers returned from enumerate
     // must be made permanent.
     if (_identifierisstring(ids[index])) {
       JS::Rooted<JSString*> str(cx, NPIdentifierToString(ids[index]));
       if (!JS_StringHasBeenInterned(cx, str)) {
         DebugOnly<JSString*> str2 = JS_InternJSString(cx, str);
         NS_ASSERTION(str2 == str, "Interning a JS string which is currently an ID should return itself.");
       }
     }
     PluginIdentifierParent* id =
       instance->Module()->GetIdentifierForNPIdentifier(instance->GetNPP(), ids[index]);
     aProperties->AppendElement(id);
     NS_ASSERTION(!id->IsTemporary(), "Should only have permanent identifiers!");
   }
   npn->memfree(ids);
   *aSuccess = true;
   return true;
 }
 bool
 PluginScriptableObjectParent::AnswerConstruct(const 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;
   }
   const NPNetscapeFuncs* npn = GetNetscapeFuncs(instance);
   if (!npn) {
     NS_ERROR("No netscape funcs?!");
     *aResult = void_t();
     *aSuccess = false;
     return true;
   }
   AutoFallibleTArray<NPVariant, 10> convertedArgs;
   uint32_t argCount = aArgs.Length();
   if (!convertedArgs.SetLength(argCount)) {
     *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;
   }
   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;
   }
   PluginIdentifierParent::StackIdentifier identifier(GetInstance(), aName);
   if (!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;
 }

The Tor Browser / annotate

dom/plugins/ipc/PluginScriptableObjectParent.cpp@b8a032363ba2 (annotated)

dom/plugins/ipc/PluginScriptableObjectParent.cpp