diff options
Diffstat (limited to 'dom/plugins/ipc/PluginScriptableObjectChild.cpp')
| -rw-r--r-- | dom/plugins/ipc/PluginScriptableObjectChild.cpp | 1298 |
1 files changed, 1298 insertions, 0 deletions
diff --git a/dom/plugins/ipc/PluginScriptableObjectChild.cpp b/dom/plugins/ipc/PluginScriptableObjectChild.cpp new file mode 100644 index 000000000..371189170 --- /dev/null +++ b/dom/plugins/ipc/PluginScriptableObjectChild.cpp @@ -0,0 +1,1298 @@ +/* -*- 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 "PluginScriptableObjectChild.h" +#include "PluginScriptableObjectUtils.h" +#include "mozilla/plugins/PluginTypes.h" + +using namespace mozilla::plugins; + +/** + * NPIdentifiers in the plugin process use a tagged representation. The low bit + * stores the tag. If it's zero, the identifier is a string, and the value is a + * pointer to a StoredIdentifier. If the tag bit is 1, then the rest of the + * NPIdentifier value is the integer itself. Like the JSAPI, we require that all + * integers stored in NPIdentifier be non-negative. + * + * String identifiers are stored in the sIdentifiers hashtable to ensure + * uniqueness. The lifetime of these identifiers is only as long as the incoming + * IPC call from the chrome process. If the plugin wants to retain an + * identifier, it needs to call NPN_GetStringIdentifier, which causes the + * mPermanent flag to be set on the identifier. When this flag is set, the + * identifier is saved until the plugin process exits. + * + * The StackIdentifier RAII class is used to manage ownership of + * identifiers. Any identifier obtained from this class should not be used + * outside its scope, except when the MakePermanent() method has been called on + * it. + * + * The lifetime of an NPIdentifier in the plugin process is totally divorced + * from the lifetime of an NPIdentifier in the chrome process (where an + * NPIdentifier is stored as a jsid). The JS GC in the chrome process is able to + * trace through the entire heap, unlike in the plugin process, so there is no + * reason to retain identifiers there. + */ + +PluginScriptableObjectChild::IdentifierTable PluginScriptableObjectChild::sIdentifiers; + +/* static */ PluginScriptableObjectChild::StoredIdentifier* +PluginScriptableObjectChild::HashIdentifier(const nsCString& aIdentifier) +{ + StoredIdentifier* stored = sIdentifiers.Get(aIdentifier).get(); + if (stored) { + return stored; + } + + stored = new StoredIdentifier(aIdentifier); + sIdentifiers.Put(aIdentifier, stored); + return stored; +} + +/* static */ void +PluginScriptableObjectChild::UnhashIdentifier(StoredIdentifier* aStored) +{ + MOZ_ASSERT(sIdentifiers.Get(aStored->mIdentifier)); + sIdentifiers.Remove(aStored->mIdentifier); +} + +/* static */ void +PluginScriptableObjectChild::ClearIdentifiers() +{ + sIdentifiers.Clear(); +} + +PluginScriptableObjectChild::StackIdentifier::StackIdentifier(const PluginIdentifier& aIdentifier) +: mIdentifier(aIdentifier), + mStored(nullptr) +{ + if (aIdentifier.type() == PluginIdentifier::TnsCString) { + mStored = PluginScriptableObjectChild::HashIdentifier(mIdentifier.get_nsCString()); + } +} + +PluginScriptableObjectChild::StackIdentifier::StackIdentifier(NPIdentifier aIdentifier) +: mStored(nullptr) +{ + uintptr_t bits = reinterpret_cast<uintptr_t>(aIdentifier); + if (bits & 1) { + int32_t num = int32_t(bits >> 1); + mIdentifier = PluginIdentifier(num); + } else { + mStored = static_cast<StoredIdentifier*>(aIdentifier); + mIdentifier = mStored->mIdentifier; + } +} + +PluginScriptableObjectChild::StackIdentifier::~StackIdentifier() +{ + if (!mStored) { + return; + } + + // Each StackIdentifier owns one reference to its StoredIdentifier. In + // addition, the sIdentifiers table owns a reference. If mPermanent is false + // and sIdentifiers has the last reference, then we want to remove the + // StoredIdentifier from the table (and destroy it). + StoredIdentifier *stored = mStored; + mStored = nullptr; + if (stored->mRefCnt == 1 && !stored->mPermanent) { + PluginScriptableObjectChild::UnhashIdentifier(stored); + } +} + +NPIdentifier +PluginScriptableObjectChild::StackIdentifier::ToNPIdentifier() const +{ + if (mStored) { + MOZ_ASSERT(mIdentifier.type() == PluginIdentifier::TnsCString); + MOZ_ASSERT((reinterpret_cast<uintptr_t>(mStored.get()) & 1) == 0); + return mStored; + } + + int32_t num = mIdentifier.get_int32_t(); + // The JS engine imposes this condition on int32s in jsids, so we assume it. + MOZ_ASSERT(num >= 0); + return reinterpret_cast<NPIdentifier>((num << 1) | 1); +} + +static PluginIdentifier +FromNPIdentifier(NPIdentifier aIdentifier) +{ + PluginScriptableObjectChild::StackIdentifier stack(aIdentifier); + return stack.GetIdentifier(); +} + +// static +NPObject* +PluginScriptableObjectChild::ScriptableAllocate(NPP aInstance, + NPClass* aClass) +{ + AssertPluginThread(); + + if (aClass != GetClass()) { + NS_RUNTIMEABORT("Huh?! Wrong class!"); + } + + return new ChildNPObject(); +} + +// static +void +PluginScriptableObjectChild::ScriptableInvalidate(NPObject* aObject) +{ + AssertPluginThread(); + + if (aObject->_class != GetClass()) { + NS_RUNTIMEABORT("Don't know what kind of object this is!"); + } + + ChildNPObject* object = reinterpret_cast<ChildNPObject*>(aObject); + if (object->invalidated) { + // This can happen more than once, and is just fine. + return; + } + + object->invalidated = true; +} + +// static +void +PluginScriptableObjectChild::ScriptableDeallocate(NPObject* aObject) +{ + AssertPluginThread(); + + if (aObject->_class != GetClass()) { + NS_RUNTIMEABORT("Don't know what kind of object this is!"); + } + + ChildNPObject* object = reinterpret_cast<ChildNPObject*>(aObject); + PluginScriptableObjectChild* actor = object->parent; + if (actor) { + NS_ASSERTION(actor->Type() == Proxy, "Bad type!"); + actor->DropNPObject(); + } + + delete object; +} + +// static +bool +PluginScriptableObjectChild::ScriptableHasMethod(NPObject* aObject, + NPIdentifier aName) +{ + AssertPluginThread(); + + if (aObject->_class != GetClass()) { + NS_RUNTIMEABORT("Don't know what kind of object this is!"); + } + + ChildNPObject* object = reinterpret_cast<ChildNPObject*>(aObject); + if (object->invalidated) { + NS_WARNING("Calling method on an invalidated object!"); + return false; + } + + ProtectedActor<PluginScriptableObjectChild> actor(object->parent); + NS_ASSERTION(actor, "This shouldn't ever be null!"); + NS_ASSERTION(actor->Type() == Proxy, "Bad type!"); + + bool result; + actor->CallHasMethod(FromNPIdentifier(aName), &result); + + return result; +} + +// static +bool +PluginScriptableObjectChild::ScriptableInvoke(NPObject* aObject, + NPIdentifier aName, + const NPVariant* aArgs, + uint32_t aArgCount, + NPVariant* aResult) +{ + AssertPluginThread(); + + if (aObject->_class != GetClass()) { + NS_RUNTIMEABORT("Don't know what kind of object this is!"); + } + + ChildNPObject* object = reinterpret_cast<ChildNPObject*>(aObject); + if (object->invalidated) { + NS_WARNING("Calling method on an invalidated object!"); + return false; + } + + ProtectedActor<PluginScriptableObjectChild> actor(object->parent); + NS_ASSERTION(actor, "This shouldn't ever be null!"); + 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; + actor->CallInvoke(FromNPIdentifier(aName), args, + &remoteResult, &success); + + if (!success) { + return false; + } + + ConvertToVariant(remoteResult, *aResult); + return true; +} + +// static +bool +PluginScriptableObjectChild::ScriptableInvokeDefault(NPObject* aObject, + const NPVariant* aArgs, + uint32_t aArgCount, + NPVariant* aResult) +{ + AssertPluginThread(); + + if (aObject->_class != GetClass()) { + NS_RUNTIMEABORT("Don't know what kind of object this is!"); + } + + ChildNPObject* object = reinterpret_cast<ChildNPObject*>(aObject); + if (object->invalidated) { + NS_WARNING("Calling method on an invalidated object!"); + return false; + } + + ProtectedActor<PluginScriptableObjectChild> actor(object->parent); + NS_ASSERTION(actor, "This shouldn't ever be null!"); + 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; + actor->CallInvokeDefault(args, &remoteResult, &success); + + if (!success) { + return false; + } + + ConvertToVariant(remoteResult, *aResult); + return true; +} + +// static +bool +PluginScriptableObjectChild::ScriptableHasProperty(NPObject* aObject, + NPIdentifier aName) +{ + AssertPluginThread(); + + if (aObject->_class != GetClass()) { + NS_RUNTIMEABORT("Don't know what kind of object this is!"); + } + + ChildNPObject* object = reinterpret_cast<ChildNPObject*>(aObject); + if (object->invalidated) { + NS_WARNING("Calling method on an invalidated object!"); + return false; + } + + ProtectedActor<PluginScriptableObjectChild> actor(object->parent); + NS_ASSERTION(actor, "This shouldn't ever be null!"); + NS_ASSERTION(actor->Type() == Proxy, "Bad type!"); + + bool result; + actor->CallHasProperty(FromNPIdentifier(aName), &result); + + return result; +} + +// static +bool +PluginScriptableObjectChild::ScriptableGetProperty(NPObject* aObject, + NPIdentifier aName, + NPVariant* aResult) +{ + AssertPluginThread(); + + if (aObject->_class != GetClass()) { + NS_RUNTIMEABORT("Don't know what kind of object this is!"); + } + + ChildNPObject* object = reinterpret_cast<ChildNPObject*>(aObject); + if (object->invalidated) { + NS_WARNING("Calling method on an invalidated object!"); + return false; + } + + ProtectedActor<PluginScriptableObjectChild> actor(object->parent); + NS_ASSERTION(actor, "This shouldn't ever be null!"); + NS_ASSERTION(actor->Type() == Proxy, "Bad type!"); + + PluginInstanceChild::AutoStackHelper guard(actor->mInstance); + + Variant result; + bool success; + actor->CallGetParentProperty(FromNPIdentifier(aName), + &result, &success); + + if (!success) { + return false; + } + + ConvertToVariant(result, *aResult); + return true; +} + +// static +bool +PluginScriptableObjectChild::ScriptableSetProperty(NPObject* aObject, + NPIdentifier aName, + const NPVariant* aValue) +{ + AssertPluginThread(); + + if (aObject->_class != GetClass()) { + NS_RUNTIMEABORT("Don't know what kind of object this is!"); + } + + ChildNPObject* object = reinterpret_cast<ChildNPObject*>(aObject); + if (object->invalidated) { + NS_WARNING("Calling method on an invalidated object!"); + return false; + } + + ProtectedActor<PluginScriptableObjectChild> actor(object->parent); + NS_ASSERTION(actor, "This shouldn't ever be null!"); + 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; + actor->CallSetProperty(FromNPIdentifier(aName), value, + &success); + + return success; +} + +// static +bool +PluginScriptableObjectChild::ScriptableRemoveProperty(NPObject* aObject, + NPIdentifier aName) +{ + AssertPluginThread(); + + if (aObject->_class != GetClass()) { + NS_RUNTIMEABORT("Don't know what kind of object this is!"); + } + + ChildNPObject* object = reinterpret_cast<ChildNPObject*>(aObject); + if (object->invalidated) { + NS_WARNING("Calling method on an invalidated object!"); + return false; + } + + ProtectedActor<PluginScriptableObjectChild> actor(object->parent); + NS_ASSERTION(actor, "This shouldn't ever be null!"); + NS_ASSERTION(actor->Type() == Proxy, "Bad type!"); + + bool success; + actor->CallRemoveProperty(FromNPIdentifier(aName), + &success); + + return success; +} + +// static +bool +PluginScriptableObjectChild::ScriptableEnumerate(NPObject* aObject, + NPIdentifier** aIdentifiers, + uint32_t* aCount) +{ + AssertPluginThread(); + + if (aObject->_class != GetClass()) { + NS_RUNTIMEABORT("Don't know what kind of object this is!"); + } + + ChildNPObject* object = reinterpret_cast<ChildNPObject*>(aObject); + if (object->invalidated) { + NS_WARNING("Calling method on an invalidated object!"); + return false; + } + + ProtectedActor<PluginScriptableObjectChild> actor(object->parent); + NS_ASSERTION(actor, "This shouldn't ever be null!"); + NS_ASSERTION(actor->Type() == Proxy, "Bad type!"); + + AutoTArray<PluginIdentifier, 10> identifiers; + bool success; + actor->CallEnumerate(&identifiers, &success); + + if (!success) { + return false; + } + + *aCount = identifiers.Length(); + if (!*aCount) { + *aIdentifiers = nullptr; + return true; + } + + *aIdentifiers = reinterpret_cast<NPIdentifier*>( + PluginModuleChild::sBrowserFuncs.memalloc(*aCount * sizeof(NPIdentifier))); + if (!*aIdentifiers) { + NS_ERROR("Out of memory!"); + return false; + } + + for (uint32_t index = 0; index < *aCount; index++) { + StackIdentifier id(identifiers[index]); + // Make the id permanent in case the plugin retains it. + id.MakePermanent(); + (*aIdentifiers)[index] = id.ToNPIdentifier(); + } + return true; +} + +// static +bool +PluginScriptableObjectChild::ScriptableConstruct(NPObject* aObject, + const NPVariant* aArgs, + uint32_t aArgCount, + NPVariant* aResult) +{ + AssertPluginThread(); + + if (aObject->_class != GetClass()) { + NS_RUNTIMEABORT("Don't know what kind of object this is!"); + } + + ChildNPObject* object = reinterpret_cast<ChildNPObject*>(aObject); + if (object->invalidated) { + NS_WARNING("Calling method on an invalidated object!"); + return false; + } + + ProtectedActor<PluginScriptableObjectChild> actor(object->parent); + NS_ASSERTION(actor, "This shouldn't ever be null!"); + 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; + actor->CallConstruct(args, &remoteResult, &success); + + if (!success) { + return false; + } + + ConvertToVariant(remoteResult, *aResult); + return true; +} + +const NPClass PluginScriptableObjectChild::sNPClass = { + NP_CLASS_STRUCT_VERSION, + PluginScriptableObjectChild::ScriptableAllocate, + PluginScriptableObjectChild::ScriptableDeallocate, + PluginScriptableObjectChild::ScriptableInvalidate, + PluginScriptableObjectChild::ScriptableHasMethod, + PluginScriptableObjectChild::ScriptableInvoke, + PluginScriptableObjectChild::ScriptableInvokeDefault, + PluginScriptableObjectChild::ScriptableHasProperty, + PluginScriptableObjectChild::ScriptableGetProperty, + PluginScriptableObjectChild::ScriptableSetProperty, + PluginScriptableObjectChild::ScriptableRemoveProperty, + PluginScriptableObjectChild::ScriptableEnumerate, + PluginScriptableObjectChild::ScriptableConstruct +}; + +PluginScriptableObjectChild::PluginScriptableObjectChild( + ScriptableObjectType aType) +: mInstance(nullptr), + mObject(nullptr), + mInvalidated(false), + mProtectCount(0), + mType(aType) +{ + AssertPluginThread(); +} + +PluginScriptableObjectChild::~PluginScriptableObjectChild() +{ + AssertPluginThread(); + + if (mObject) { + UnregisterActor(mObject); + + if (mObject->_class == GetClass()) { + NS_ASSERTION(mType == Proxy, "Wrong type!"); + static_cast<ChildNPObject*>(mObject)->parent = nullptr; + } + else { + NS_ASSERTION(mType == LocalObject, "Wrong type!"); + PluginModuleChild::sBrowserFuncs.releaseobject(mObject); + } + } +} + +bool +PluginScriptableObjectChild::InitializeProxy() +{ + AssertPluginThread(); + NS_ASSERTION(mType == Proxy, "Bad type!"); + NS_ASSERTION(!mObject, "Calling Initialize more than once!"); + NS_ASSERTION(!mInvalidated, "Already invalidated?!"); + + mInstance = static_cast<PluginInstanceChild*>(Manager()); + NS_ASSERTION(mInstance, "Null manager?!"); + + NPObject* object = CreateProxyObject(); + if (!object) { + NS_ERROR("Failed to create object!"); + return false; + } + + if (!RegisterActor(object)) { + NS_ERROR("RegisterActor failed"); + return false; + } + + mObject = object; + return true; +} + +void +PluginScriptableObjectChild::InitializeLocal(NPObject* aObject) +{ + AssertPluginThread(); + NS_ASSERTION(mType == LocalObject, "Bad type!"); + NS_ASSERTION(!mObject, "Calling Initialize more than once!"); + NS_ASSERTION(!mInvalidated, "Already invalidated?!"); + + mInstance = static_cast<PluginInstanceChild*>(Manager()); + NS_ASSERTION(mInstance, "Null manager?!"); + + PluginModuleChild::sBrowserFuncs.retainobject(aObject); + + NS_ASSERTION(!mProtectCount, "Should be zero!"); + mProtectCount++; + + if (!RegisterActor(aObject)) { + NS_ERROR("RegisterActor failed"); + } + + mObject = aObject; +} + +NPObject* +PluginScriptableObjectChild::CreateProxyObject() +{ + NS_ASSERTION(mInstance, "Must have an instance!"); + NS_ASSERTION(mType == Proxy, "Shouldn't call this for non-proxy object!"); + + NPClass* proxyClass = const_cast<NPClass*>(GetClass()); + NPObject* npobject = + PluginModuleChild::sBrowserFuncs.createobject(mInstance->GetNPP(), + proxyClass); + 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!"); + + ChildNPObject* object = static_cast<ChildNPObject*>(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, "NPObject"); + + object->parent = const_cast<PluginScriptableObjectChild*>(this); + return object; +} + +bool +PluginScriptableObjectChild::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!"); + + if (!InitializeProxy()) { + NS_ERROR("Initialize failed!"); + return false; + } + + SendProtect(); + return true; +} + +NPObject* +PluginScriptableObjectChild::GetObject(bool aCanResurrect) +{ + if (!mObject && aCanResurrect && !ResurrectProxyObject()) { + NS_ERROR("Null object!"); + return nullptr; + } + return mObject; +} + +void +PluginScriptableObjectChild::Protect() +{ + NS_ASSERTION(mObject, "No object!"); + NS_ASSERTION(mProtectCount >= 0, "Negative retain count?!"); + + if (mType == LocalObject) { + ++mProtectCount; + } +} + +void +PluginScriptableObjectChild::Unprotect() +{ + NS_ASSERTION(mObject, "Bad state!"); + NS_ASSERTION(mProtectCount >= 0, "Negative retain count?!"); + + if (mType == LocalObject) { + if (--mProtectCount == 0) { + PluginScriptableObjectChild::Send__delete__(this); + } + } +} + +void +PluginScriptableObjectChild::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. + UnregisterActor(mObject); + mObject = nullptr; + + SendUnprotect(); +} + +void +PluginScriptableObjectChild::NPObjectDestroyed() +{ + NS_ASSERTION(LocalObject == mType, + "ScriptableDeallocate should have handled this for proxies"); + mInvalidated = true; + mObject = nullptr; +} + +bool +PluginScriptableObjectChild::AnswerInvalidate() +{ + AssertPluginThread(); + PluginInstanceChild::AutoStackHelper guard(mInstance); + + if (mInvalidated) { + return true; + } + + mInvalidated = true; + + NS_ASSERTION(mObject->_class != GetClass(), "Bad object type!"); + NS_ASSERTION(mType == LocalObject, "Bad type!"); + + if (mObject->_class && mObject->_class->invalidate) { + mObject->_class->invalidate(mObject); + } + + Unprotect(); + + return true; +} + +bool +PluginScriptableObjectChild::AnswerHasMethod(const PluginIdentifier& aId, + bool* aHasMethod) +{ + AssertPluginThread(); + PluginInstanceChild::AutoStackHelper guard(mInstance); + + if (mInvalidated) { + 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!"); + + if (!(mObject->_class && mObject->_class->hasMethod)) { + *aHasMethod = false; + return true; + } + + StackIdentifier id(aId); + *aHasMethod = mObject->_class->hasMethod(mObject, id.ToNPIdentifier()); + return true; +} + +bool +PluginScriptableObjectChild::AnswerInvoke(const PluginIdentifier& aId, + InfallibleTArray<Variant>&& aArgs, + Variant* aResult, + bool* aSuccess) +{ + AssertPluginThread(); + PluginInstanceChild::AutoStackHelper guard(mInstance); + + if (mInvalidated) { + 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!"); + + if (!(mObject->_class && mObject->_class->invoke)) { + *aResult = void_t(); + *aSuccess = false; + return true; + } + + AutoTArray<NPVariant, 10> convertedArgs; + uint32_t argCount = aArgs.Length(); + + if (!convertedArgs.SetLength(argCount, mozilla::fallible)) { + *aResult = void_t(); + *aSuccess = false; + return true; + } + + for (uint32_t index = 0; index < argCount; index++) { + ConvertToVariant(aArgs[index], convertedArgs[index]); + } + + NPVariant result; + VOID_TO_NPVARIANT(result); + StackIdentifier id(aId); + bool success = mObject->_class->invoke(mObject, id.ToNPIdentifier(), + convertedArgs.Elements(), argCount, + &result); + + for (uint32_t index = 0; index < argCount; index++) { + PluginModuleChild::sBrowserFuncs.releasevariantvalue(&convertedArgs[index]); + } + + if (!success) { + *aResult = void_t(); + *aSuccess = false; + return true; + } + + Variant convertedResult; + success = ConvertToRemoteVariant(result, convertedResult, GetInstance(), + false); + + DeferNPVariantLastRelease(&PluginModuleChild::sBrowserFuncs, &result); + + if (!success) { + *aResult = void_t(); + *aSuccess = false; + return true; + } + + *aSuccess = true; + *aResult = convertedResult; + return true; +} + +bool +PluginScriptableObjectChild::AnswerInvokeDefault(InfallibleTArray<Variant>&& aArgs, + Variant* aResult, + bool* aSuccess) +{ + AssertPluginThread(); + PluginInstanceChild::AutoStackHelper guard(mInstance); + + if (mInvalidated) { + NS_WARNING("Calling AnswerInvokeDefault 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!"); + + if (!(mObject->_class && mObject->_class->invokeDefault)) { + *aResult = void_t(); + *aSuccess = false; + return true; + } + + AutoTArray<NPVariant, 10> convertedArgs; + uint32_t argCount = aArgs.Length(); + + if (!convertedArgs.SetLength(argCount, mozilla::fallible)) { + *aResult = void_t(); + *aSuccess = false; + return true; + } + + for (uint32_t index = 0; index < argCount; index++) { + ConvertToVariant(aArgs[index], convertedArgs[index]); + } + + NPVariant result; + VOID_TO_NPVARIANT(result); + bool success = mObject->_class->invokeDefault(mObject, + convertedArgs.Elements(), + argCount, &result); + + for (uint32_t index = 0; index < argCount; index++) { + PluginModuleChild::sBrowserFuncs.releasevariantvalue(&convertedArgs[index]); + } + + if (!success) { + *aResult = void_t(); + *aSuccess = false; + return true; + } + + Variant convertedResult; + success = ConvertToRemoteVariant(result, convertedResult, GetInstance(), + false); + + DeferNPVariantLastRelease(&PluginModuleChild::sBrowserFuncs, &result); + + if (!success) { + *aResult = void_t(); + *aSuccess = false; + return true; + } + + *aResult = convertedResult; + *aSuccess = true; + return true; +} + +bool +PluginScriptableObjectChild::AnswerHasProperty(const PluginIdentifier& aId, + bool* aHasProperty) +{ + AssertPluginThread(); + PluginInstanceChild::AutoStackHelper guard(mInstance); + + if (mInvalidated) { + 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!"); + + if (!(mObject->_class && mObject->_class->hasProperty)) { + *aHasProperty = false; + return true; + } + + StackIdentifier id(aId); + *aHasProperty = mObject->_class->hasProperty(mObject, id.ToNPIdentifier()); + return true; +} + +bool +PluginScriptableObjectChild::AnswerGetChildProperty(const PluginIdentifier& aId, + bool* aHasProperty, + bool* aHasMethod, + Variant* aResult, + bool* aSuccess) +{ + AssertPluginThread(); + PluginInstanceChild::AutoStackHelper guard(mInstance); + + *aHasProperty = *aHasMethod = *aSuccess = false; + *aResult = void_t(); + + if (mInvalidated) { + NS_WARNING("Calling AnswerGetProperty with an invalidated object!"); + return true; + } + + NS_ASSERTION(mObject->_class != GetClass(), "Bad object type!"); + NS_ASSERTION(mType == LocalObject, "Bad type!"); + + if (!(mObject->_class && mObject->_class->hasProperty && + mObject->_class->hasMethod && mObject->_class->getProperty)) { + return true; + } + + StackIdentifier stackID(aId); + NPIdentifier id = stackID.ToNPIdentifier(); + + *aHasProperty = mObject->_class->hasProperty(mObject, id); + *aHasMethod = mObject->_class->hasMethod(mObject, id); + + if (*aHasProperty) { + NPVariant result; + VOID_TO_NPVARIANT(result); + + if (!mObject->_class->getProperty(mObject, id, &result)) { + return true; + } + + Variant converted; + if ((*aSuccess = ConvertToRemoteVariant(result, converted, GetInstance(), + false))) { + DeferNPVariantLastRelease(&PluginModuleChild::sBrowserFuncs, &result); + *aResult = converted; + } + } + + return true; +} + +bool +PluginScriptableObjectChild::AnswerSetProperty(const PluginIdentifier& aId, + const Variant& aValue, + bool* aSuccess) +{ + AssertPluginThread(); + PluginInstanceChild::AutoStackHelper guard(mInstance); + + if (mInvalidated) { + 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!"); + + if (!(mObject->_class && mObject->_class->hasProperty && + mObject->_class->setProperty)) { + *aSuccess = false; + return true; + } + + StackIdentifier stackID(aId); + NPIdentifier id = stackID.ToNPIdentifier(); + + if (!mObject->_class->hasProperty(mObject, id)) { + *aSuccess = false; + return true; + } + + NPVariant converted; + ConvertToVariant(aValue, converted); + + if ((*aSuccess = mObject->_class->setProperty(mObject, id, &converted))) { + PluginModuleChild::sBrowserFuncs.releasevariantvalue(&converted); + } + return true; +} + +bool +PluginScriptableObjectChild::AnswerRemoveProperty(const PluginIdentifier& aId, + bool* aSuccess) +{ + AssertPluginThread(); + PluginInstanceChild::AutoStackHelper guard(mInstance); + + if (mInvalidated) { + 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!"); + + if (!(mObject->_class && mObject->_class->hasProperty && + mObject->_class->removeProperty)) { + *aSuccess = false; + return true; + } + + StackIdentifier stackID(aId); + NPIdentifier id = stackID.ToNPIdentifier(); + *aSuccess = mObject->_class->hasProperty(mObject, id) ? + mObject->_class->removeProperty(mObject, id) : + true; + + return true; +} + +bool +PluginScriptableObjectChild::AnswerEnumerate(InfallibleTArray<PluginIdentifier>* aProperties, + bool* aSuccess) +{ + AssertPluginThread(); + PluginInstanceChild::AutoStackHelper guard(mInstance); + + if (mInvalidated) { + 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!"); + + if (!(mObject->_class && mObject->_class->enumerate)) { + *aSuccess = false; + return true; + } + + NPIdentifier* ids; + uint32_t idCount; + if (!mObject->_class->enumerate(mObject, &ids, &idCount)) { + *aSuccess = false; + return true; + } + + aProperties->SetCapacity(idCount); + + for (uint32_t index = 0; index < idCount; index++) { + aProperties->AppendElement(FromNPIdentifier(ids[index])); + } + + PluginModuleChild::sBrowserFuncs.memfree(ids); + *aSuccess = true; + return true; +} + +bool +PluginScriptableObjectChild::AnswerConstruct(InfallibleTArray<Variant>&& aArgs, + Variant* aResult, + bool* aSuccess) +{ + AssertPluginThread(); + PluginInstanceChild::AutoStackHelper guard(mInstance); + + if (mInvalidated) { + 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!"); + + if (!(mObject->_class && mObject->_class->construct)) { + *aResult = void_t(); + *aSuccess = false; + return true; + } + + AutoTArray<NPVariant, 10> convertedArgs; + uint32_t argCount = aArgs.Length(); + + if (!convertedArgs.SetLength(argCount, mozilla::fallible)) { + *aResult = void_t(); + *aSuccess = false; + return true; + } + + for (uint32_t index = 0; index < argCount; index++) { + ConvertToVariant(aArgs[index], convertedArgs[index]); + } + + NPVariant result; + VOID_TO_NPVARIANT(result); + bool success = mObject->_class->construct(mObject, convertedArgs.Elements(), + argCount, &result); + + for (uint32_t index = 0; index < argCount; index++) { + PluginModuleChild::sBrowserFuncs.releasevariantvalue(&convertedArgs[index]); + } + + if (!success) { + *aResult = void_t(); + *aSuccess = false; + return true; + } + + Variant convertedResult; + success = ConvertToRemoteVariant(result, convertedResult, GetInstance(), + false); + + DeferNPVariantLastRelease(&PluginModuleChild::sBrowserFuncs, &result); + + if (!success) { + *aResult = void_t(); + *aSuccess = false; + return true; + } + + *aResult = convertedResult; + *aSuccess = true; + return true; +} + +bool +PluginScriptableObjectChild::RecvProtect() +{ + NS_ASSERTION(mObject->_class != GetClass(), "Bad object type!"); + NS_ASSERTION(mType == LocalObject, "Bad type!"); + + Protect(); + return true; +} + +bool +PluginScriptableObjectChild::RecvUnprotect() +{ + NS_ASSERTION(mObject->_class != GetClass(), "Bad object type!"); + NS_ASSERTION(mType == LocalObject, "Bad type!"); + + Unprotect(); + return true; +} + +bool +PluginScriptableObjectChild::Evaluate(NPString* aScript, + NPVariant* aResult) +{ + PluginInstanceChild::AutoStackHelper guard(mInstance); + + nsDependentCString script(""); + if (aScript->UTF8Characters && aScript->UTF8Length) { + script.Rebind(aScript->UTF8Characters, aScript->UTF8Length); + } + + bool success; + Variant result; + CallNPN_Evaluate(script, &result, &success); + + if (!success) { + return false; + } + + ConvertToVariant(result, *aResult); + return true; +} + +nsTHashtable<PluginScriptableObjectChild::NPObjectData>* PluginScriptableObjectChild::sObjectMap; + +bool +PluginScriptableObjectChild::RegisterActor(NPObject* aObject) +{ + AssertPluginThread(); + MOZ_ASSERT(aObject, "Null pointer!"); + + NPObjectData* d = sObjectMap->GetEntry(aObject); + if (!d) { + NS_ERROR("NPObject not in object table"); + return false; + } + + d->actor = this; + return true; +} + +void +PluginScriptableObjectChild::UnregisterActor(NPObject* aObject) +{ + AssertPluginThread(); + MOZ_ASSERT(aObject, "Null pointer!"); + + NPObjectData* d = sObjectMap->GetEntry(aObject); + MOZ_ASSERT(d, "NPObject not in object table"); + if (d) { + d->actor = nullptr; + } +} + +/* static */ PluginScriptableObjectChild* +PluginScriptableObjectChild::GetActorForNPObject(NPObject* aObject) +{ + AssertPluginThread(); + MOZ_ASSERT(aObject, "Null pointer!"); + + NPObjectData* d = sObjectMap->GetEntry(aObject); + if (!d) { + NS_ERROR("Plugin using object not created with NPN_CreateObject?"); + return nullptr; + } + + return d->actor; +} + +/* static */ void +PluginScriptableObjectChild::RegisterObject(NPObject* aObject, PluginInstanceChild* aInstance) +{ + AssertPluginThread(); + + if (!sObjectMap) { + sObjectMap = new nsTHashtable<PluginScriptableObjectChild::NPObjectData>(); + } + + NPObjectData* d = sObjectMap->PutEntry(aObject); + MOZ_ASSERT(!d->instance, "New NPObject already mapped?"); + d->instance = aInstance; +} + +/* static */ void +PluginScriptableObjectChild::UnregisterObject(NPObject* aObject) +{ + AssertPluginThread(); + + sObjectMap->RemoveEntry(aObject); + + if (!sObjectMap->Count()) { + delete sObjectMap; + sObjectMap = nullptr; + } +} + +/* static */ PluginInstanceChild* +PluginScriptableObjectChild::GetInstanceForNPObject(NPObject* aObject) +{ + AssertPluginThread(); + NPObjectData* d = sObjectMap->GetEntry(aObject); + if (!d) { + return nullptr; + } + return d->instance; +} + +/* static */ void +PluginScriptableObjectChild::NotifyOfInstanceShutdown(PluginInstanceChild* aInstance) +{ + AssertPluginThread(); + if (!sObjectMap) { + return; + } + + for (auto iter = sObjectMap->Iter(); !iter.Done(); iter.Next()) { + NPObjectData* d = iter.Get(); + if (d->instance == aInstance) { + NPObject* o = d->GetKey(); + aInstance->mDeletingHash->PutEntry(o); + } + } +} |