From 702c4247d74ffb7e4fb1aaca96d70f4591203ba2 Mon Sep 17 00:00:00 2001 From: Erik Verbruggen Date: Wed, 22 Jun 2016 10:12:13 +0200 Subject: V4: Pass scope around as parameters inside the runtime. The implementation of many (or all) runtime functions consist of first creating a QV4::Scope, which saves and restores the JS stack pointer. It also prevents tail-calls because of that restoring behavior. In many cases it suffices to do that at the entry-point of the runtime. The return value of a JS function call is now also stored in the scope. Previously, all return values were stored in a ScopedValue, got loaded on return, and immediately stored in another ScopedValue in the caller. This resulted in a lot of stores, where now there is only one store needed, and no extra ScopedValue for every function. Change-Id: I13d80fc0ce72c5702ef1536d41d12f710c5914fa Reviewed-by: Simon Hausmann --- src/qml/qml/qqmlbinding.cpp | 10 ++++++---- src/qml/qml/qqmlboundsignal.cpp | 4 ++-- src/qml/qml/qqmlcomponent.cpp | 2 +- src/qml/qml/qqmldelayedcallqueue.cpp | 2 +- src/qml/qml/qqmlexpression.cpp | 9 +++++---- src/qml/qml/qqmlexpression_p.h | 2 +- src/qml/qml/qqmljavascriptexpression.cpp | 24 +++++++----------------- src/qml/qml/qqmljavascriptexpression_p.h | 5 ++--- src/qml/qml/qqmlvmemetaobject.cpp | 5 ++--- src/qml/qml/qqmlxmlhttprequest.cpp | 17 +++++++++-------- src/qml/qml/v8/qqmlbuiltinfunctions.cpp | 5 ++--- src/qml/qml/v8/qqmlbuiltinfunctions_p.h | 2 +- 12 files changed, 39 insertions(+), 48 deletions(-) (limited to 'src/qml/qml') diff --git a/src/qml/qml/qqmlbinding.cpp b/src/qml/qml/qqmlbinding.cpp index eacb928901..3940176107 100644 --- a/src/qml/qml/qqmlbinding.cpp +++ b/src/qml/qml/qqmlbinding.cpp @@ -189,11 +189,12 @@ void QQmlBinding::update(QQmlPropertyPrivate::WriteFlags flags) bool isUndefined = false; - QV4::ScopedValue result(scope, QQmlJavaScriptExpression::evaluate(&isUndefined)); + QV4::ScopedCallData callData(scope); + QQmlJavaScriptExpression::evaluate(callData, &isUndefined, scope); bool error = false; if (!watcher.wasDeleted() && isAddedToObject() && !hasError()) - error = !write(pd, result, isUndefined, flags); + error = !write(pd, scope.result, isUndefined, flags); if (!watcher.wasDeleted()) { @@ -377,11 +378,12 @@ QVariant QQmlBinding::evaluate() bool isUndefined = false; QV4::Scope scope(ep->v4engine()); - QV4::ScopedValue result(scope, QQmlJavaScriptExpression::evaluate(&isUndefined)); + QV4::ScopedCallData callData(scope); + QQmlJavaScriptExpression::evaluate(callData, &isUndefined, scope); ep->dereferenceScarceResources(); - return scope.engine->toVariant(result, qMetaTypeId >()); + return scope.engine->toVariant(scope.result, qMetaTypeId >()); } QString QQmlBinding::expressionIdentifier() diff --git a/src/qml/qml/qqmlboundsignal.cpp b/src/qml/qml/qqmlboundsignal.cpp index 7d6e1ffa1a..e3c4464584 100644 --- a/src/qml/qml/qqmlboundsignal.cpp +++ b/src/qml/qml/qqmlboundsignal.cpp @@ -234,7 +234,7 @@ void QQmlBoundSignalExpression::evaluate(void **a) } } - QQmlJavaScriptExpression::evaluate(callData, 0); + QQmlJavaScriptExpression::evaluate(callData, 0, scope); ep->dereferenceScarceResources(); // "release" scarce resources if top-level expression evaluation is complete. } @@ -256,7 +256,7 @@ void QQmlBoundSignalExpression::evaluate(const QList &args) callData->args[ii] = scope.engine->fromVariant(args[ii]); } - QQmlJavaScriptExpression::evaluate(callData, 0); + QQmlJavaScriptExpression::evaluate(callData, 0, scope); ep->dereferenceScarceResources(); // "release" scarce resources if top-level expression evaluation is complete. } diff --git a/src/qml/qml/qqmlcomponent.cpp b/src/qml/qml/qqmlcomponent.cpp index 52f6837842..854090f20b 100644 --- a/src/qml/qml/qqmlcomponent.cpp +++ b/src/qml/qml/qqmlcomponent.cpp @@ -1527,7 +1527,7 @@ void QV4::QmlIncubatorObject::statusChanged(QQmlIncubator::Status s) QV4::ScopedCallData callData(scope, 1); callData->thisObject = this; callData->args[0] = QV4::Primitive::fromUInt32(s); - f->call(callData); + f->call(scope, callData); if (scope.hasException()) { QQmlError error = scope.engine->catchExceptionAsQmlError(); QQmlEnginePrivate::warning(QQmlEnginePrivate::get(scope.engine->qmlEngine()), error); diff --git a/src/qml/qml/qqmldelayedcallqueue.cpp b/src/qml/qml/qqmldelayedcallqueue.cpp index b3a0baffb4..d10a8c7718 100644 --- a/src/qml/qml/qqmldelayedcallqueue.cpp +++ b/src/qml/qml/qqmldelayedcallqueue.cpp @@ -74,7 +74,7 @@ void QQmlDelayedCallQueue::DelayedFunctionCall::execute(QV4::ExecutionEngine *en const QV4::FunctionObject *callback = m_function.as(); Q_ASSERT(callback); - callback->call(callData); + callback->call(scope, callData); if (scope.engine->hasException) { QQmlError error = scope.engine->catchExceptionAsQmlError(); diff --git a/src/qml/qml/qqmlexpression.cpp b/src/qml/qml/qqmlexpression.cpp index d48b6ad1d3..6afbd05e3e 100644 --- a/src/qml/qml/qqmlexpression.cpp +++ b/src/qml/qml/qqmlexpression.cpp @@ -245,14 +245,15 @@ void QQmlExpression::setExpression(const QString &expression) } // Must be called with a valid handle scope -QV4::ReturnedValue QQmlExpressionPrivate::v4value(bool *isUndefined) +void QQmlExpressionPrivate::v4value(bool *isUndefined, QV4::Scope &scope) { if (!expressionFunctionValid) { createQmlBinding(context(), scopeObject(), expression, url, line); expressionFunctionValid = true; } - return evaluate(isUndefined); + QV4::ScopedCallData callData(scope); + evaluate(callData, isUndefined, scope); } QVariant QQmlExpressionPrivate::value(bool *isUndefined) @@ -271,9 +272,9 @@ QVariant QQmlExpressionPrivate::value(bool *isUndefined) { QV4::Scope scope(QV8Engine::getV4(ep->v8engine())); - QV4::ScopedValue result(scope, v4value(isUndefined)); + v4value(isUndefined, scope); if (!hasError()) - rv = scope.engine->toVariant(result, -1); + rv = scope.engine->toVariant(scope.result, -1); } ep->dereferenceScarceResources(); // "release" scarce resources if top-level expression evaluation is complete. diff --git a/src/qml/qml/qqmlexpression_p.h b/src/qml/qml/qqmlexpression_p.h index ccc629a3a3..741c25e206 100644 --- a/src/qml/qml/qqmlexpression_p.h +++ b/src/qml/qml/qqmlexpression_p.h @@ -76,7 +76,7 @@ public: QVariant value(bool *isUndefined = 0); - QV4::ReturnedValue v4value(bool *isUndefined = 0); + void v4value(bool *isUndefined, QV4::Scope &scope); static inline QQmlExpressionPrivate *get(QQmlExpression *expr); static inline QQmlExpression *get(QQmlExpressionPrivate *expr); diff --git a/src/qml/qml/qqmljavascriptexpression.cpp b/src/qml/qml/qqmljavascriptexpression.cpp index 8ba4b5eba1..eff1a6e039 100644 --- a/src/qml/qml/qqmljavascriptexpression.cpp +++ b/src/qml/qml/qqmljavascriptexpression.cpp @@ -147,16 +147,9 @@ void QQmlJavaScriptExpression::refresh() { } -QV4::ReturnedValue QQmlJavaScriptExpression::evaluate(bool *isUndefined) -{ - QV4::ExecutionEngine *v4 = QV8Engine::getV4(m_context->engine); - QV4::Scope scope(v4); - QV4::ScopedCallData callData(scope); - return evaluate(callData, isUndefined); -} -QV4::ReturnedValue QQmlJavaScriptExpression::evaluate(QV4::CallData *callData, bool *isUndefined) +void QQmlJavaScriptExpression::evaluate(QV4::CallData *callData, bool *isUndefined, QV4::Scope &scope) { Q_ASSERT(m_context && m_context->engine); @@ -164,7 +157,7 @@ QV4::ReturnedValue QQmlJavaScriptExpression::evaluate(QV4::CallData *callData, b if (!f || f->isUndefined()) { if (isUndefined) *isUndefined = true; - return QV4::Encode::undefined(); + return; } QQmlEnginePrivate *ep = QQmlEnginePrivate::get(m_context->engine); @@ -184,8 +177,7 @@ QV4::ReturnedValue QQmlJavaScriptExpression::evaluate(QV4::CallData *callData, b capture.guards.copyAndClearPrepend(activeGuards); QV4::ExecutionEngine *v4 = QV8Engine::getV4(ep->v8engine()); - QV4::Scope scope(v4); - QV4::ScopedValue result(scope, QV4::Primitive::undefinedValue()); + scope.result = QV4::Primitive::undefinedValue(); callData->thisObject = v4->globalObject; if (scopeObject()) { QV4::ScopedValue value(scope, QV4::QObjectWrapper::wrap(v4, scopeObject())); @@ -193,7 +185,7 @@ QV4::ReturnedValue QQmlJavaScriptExpression::evaluate(QV4::CallData *callData, b callData->thisObject = value; } - result = f->as()->call(callData); + f->as()->call(scope, callData); if (scope.hasException()) { if (watcher.wasDeleted()) scope.engine->catchException(); // ignore exception @@ -203,7 +195,7 @@ QV4::ReturnedValue QQmlJavaScriptExpression::evaluate(QV4::CallData *callData, b *isUndefined = true; } else { if (isUndefined) - *isUndefined = result->isUndefined(); + *isUndefined = scope.result.isUndefined(); if (!watcher.wasDeleted() && hasDelayedError()) delayedError()->clearError(); @@ -220,8 +212,6 @@ QV4::ReturnedValue QQmlJavaScriptExpression::evaluate(QV4::CallData *callData, b g->Delete(); ep->propertyCapture = lastPropertyCapture; - - return result->asReturnedValue(); } void QQmlPropertyCapture::captureProperty(QQmlNotifier *n) @@ -294,11 +284,12 @@ void QQmlPropertyCapture::captureProperty(QObject *o, int c, int n) } } -void QQmlPropertyCapture::registerQmlDependencies(QV4::ExecutionEngine *engine, const QV4::CompiledData::Function *compiledFunction) +void QQmlPropertyCapture::registerQmlDependencies(const QV4::CompiledData::Function *compiledFunction, const QV4::Scope &scope) { // Let the caller check and avoid the function call :) Q_ASSERT(compiledFunction->hasQmlDependencies()); + QV4::ExecutionEngine *engine = scope.engine; QQmlEnginePrivate *ep = QQmlEnginePrivate::get(engine->qmlEngine()); if (!ep) return; @@ -306,7 +297,6 @@ void QQmlPropertyCapture::registerQmlDependencies(QV4::ExecutionEngine *engine, if (!capture) return; - QV4::Scope scope(engine); QV4::Scoped context(scope, engine->qmlContext()); QQmlContextData *qmlContext = context->qmlContext(); diff --git a/src/qml/qml/qqmljavascriptexpression_p.h b/src/qml/qml/qqmljavascriptexpression_p.h index 94479f6c5e..4472a643ff 100644 --- a/src/qml/qml/qqmljavascriptexpression_p.h +++ b/src/qml/qml/qqmljavascriptexpression_p.h @@ -103,8 +103,7 @@ public: virtual QString expressionIdentifier() = 0; virtual void expressionChanged() = 0; - QV4::ReturnedValue evaluate(bool *isUndefined); - QV4::ReturnedValue evaluate(QV4::CallData *callData, bool *isUndefined); + void evaluate(QV4::CallData *callData, bool *isUndefined, QV4::Scope &scope); inline bool notifyOnValueChanged() const; @@ -181,7 +180,7 @@ public: void captureProperty(QQmlNotifier *); void captureProperty(QObject *, int, int); - static void registerQmlDependencies(QV4::ExecutionEngine *engine, const QV4::CompiledData::Function *compiledFunction); + static void registerQmlDependencies(const QV4::CompiledData::Function *compiledFunction, const QV4::Scope &scope); QQmlEngine *engine; QQmlJavaScriptExpression *expression; diff --git a/src/qml/qml/qqmlvmemetaobject.cpp b/src/qml/qml/qqmlvmemetaobject.cpp index 6907b26cd8..a9aec4cded 100644 --- a/src/qml/qml/qqmlvmemetaobject.cpp +++ b/src/qml/qml/qqmlvmemetaobject.cpp @@ -945,15 +945,14 @@ int QQmlVMEMetaObject::metaCall(QObject *o, QMetaObject::Call c, int _id, void * for (uint ii = 0; ii < parameterCount; ++ii) callData->args[ii] = scope.engine->fromVariant(*(QVariant *)a[ii + 1]); - QV4::ScopedValue result(scope); - result = function->call(callData); + function->call(scope, callData); if (scope.hasException()) { QQmlError error = scope.engine->catchExceptionAsQmlError(); if (error.isValid()) ep->warning(error); if (a[0]) *(QVariant *)a[0] = QVariant(); } else { - if (a[0]) *(QVariant *)a[0] = scope.engine->toVariant(result, 0); + if (a[0]) *(QVariant *)a[0] = scope.engine->toVariant(scope.result, 0); } ep->dereferenceScarceResources(); // "release" scarce resources if top-level expression evaluation is complete. diff --git a/src/qml/qml/qqmlxmlhttprequest.cpp b/src/qml/qml/qqmlxmlhttprequest.cpp index e2784103b0..74de30c96c 100644 --- a/src/qml/qml/qqmlxmlhttprequest.cpp +++ b/src/qml/qml/qqmlxmlhttprequest.cpp @@ -1560,7 +1560,7 @@ void QQmlXMLHttpRequest::dispatchCallback(Object *thisObj, QQmlContextData *cont QV4::ScopedCallData callData(scope); callData->thisObject = Encode::undefined(); - callback->call(callData); + callback->call(scope, callData); if (scope.engine->hasException) { QQmlError error = scope.engine->catchExceptionAsQmlError(); @@ -1621,22 +1621,23 @@ struct QQmlXMLHttpRequestCtor : public FunctionObject c->proto->mark(e); FunctionObject::markObjects(that, e); } - static ReturnedValue construct(const Managed *that, QV4::CallData *) + static void construct(const Managed *that, Scope &scope, QV4::CallData *) { - Scope scope(static_cast(that)->engine()); Scoped ctor(scope, that->as()); - if (!ctor) - return scope.engine->throwTypeError(); + if (!ctor) { + scope.result = scope.engine->throwTypeError(); + return; + } QQmlXMLHttpRequest *r = new QQmlXMLHttpRequest(scope.engine->v8Engine->networkAccessManager()); Scoped w(scope, scope.engine->memoryManager->allocObject(r)); ScopedObject proto(scope, ctor->d()->proto); w->setPrototype(proto); - return w.asReturnedValue(); + scope.result = w.asReturnedValue(); } - static ReturnedValue call(const Managed *, QV4::CallData *) { - return Primitive::undefinedValue().asReturnedValue(); + static void call(const Managed *, Scope &scope, QV4::CallData *) { + scope.result = Primitive::undefinedValue(); } void setupProto(); diff --git a/src/qml/qml/v8/qqmlbuiltinfunctions.cpp b/src/qml/qml/v8/qqmlbuiltinfunctions.cpp index 482da31779..a0dff482b1 100644 --- a/src/qml/qml/v8/qqmlbuiltinfunctions.cpp +++ b/src/qml/qml/v8/qqmlbuiltinfunctions.cpp @@ -1285,11 +1285,10 @@ void QQmlBindingFunction::initBindingLocation() d()->bindingLocation.line = frame.line; } -ReturnedValue QQmlBindingFunction::call(const Managed *that, CallData *callData) +void QQmlBindingFunction::call(const Managed *that, Scope &scope, CallData *callData) { - Scope scope(static_cast(that)->engine()); ScopedFunctionObject function(scope, static_cast(that)->d()->originalFunction); - return function->call(callData); + function->call(scope, callData); } void QQmlBindingFunction::markObjects(Heap::Base *that, ExecutionEngine *e) diff --git a/src/qml/qml/v8/qqmlbuiltinfunctions_p.h b/src/qml/qml/v8/qqmlbuiltinfunctions_p.h index 5404ab3616..d29983c476 100644 --- a/src/qml/qml/v8/qqmlbuiltinfunctions_p.h +++ b/src/qml/qml/v8/qqmlbuiltinfunctions_p.h @@ -188,7 +188,7 @@ struct QQmlBindingFunction : public QV4::FunctionObject void initBindingLocation(); // from caller stack trace - static ReturnedValue call(const Managed *that, CallData *callData); + static void call(const Managed *that, Scope &scope, CallData *callData); static void markObjects(Heap::Base *that, ExecutionEngine *e); }; -- cgit v1.2.3