From 2e64e9e3d4bff0d93dd2671ef4aee72c566c55e1 Mon Sep 17 00:00:00 2001 From: Erik Verbruggen Date: Wed, 1 Nov 2017 12:48:12 +0100 Subject: Prevent the QML engine from registering circular dependencies Change-Id: Ic4fd2bde745e7dfaf0909e8cc575441bb04cefa3 Task-number: QTBUG-64017 Reviewed-by: Lars Knoll Reviewed-by: Marco Martin Reviewed-by: Bhushan Shah --- src/qml/qml/qqmltypeloader.cpp | 10 +++++++++- src/qml/qml/qqmltypeloader_p.h | 1 + 2 files changed, 10 insertions(+), 1 deletion(-) (limited to 'src') diff --git a/src/qml/qml/qqmltypeloader.cpp b/src/qml/qml/qqmltypeloader.cpp index 193acb04be..d9d7c19312 100644 --- a/src/qml/qml/qqmltypeloader.cpp +++ b/src/qml/qml/qqmltypeloader.cpp @@ -316,7 +316,8 @@ Returns true if the status is WaitingForDependencies. */ bool QQmlDataBlob::isWaiting() const { - return status() == WaitingForDependencies; + return status() == WaitingForDependencies || + status() == ResolvingDependencies; } /*! @@ -608,6 +609,7 @@ The default implementation does nothing. */ void QQmlDataBlob::allDependenciesDone() { + m_data.setStatus(QQmlDataBlob::ResolvingDependencies); } /*! @@ -2499,6 +2501,8 @@ void QQmlTypeData::continueLoadFromIR() void QQmlTypeData::allDependenciesDone() { + QQmlTypeLoader::Blob::allDependenciesDone(); + if (!m_typesResolved) { // Check that all imports were resolved QList errors; @@ -2618,6 +2622,10 @@ void QQmlTypeData::resolveTypes() if (ref.type.isCompositeSingleton()) { ref.typeData = typeLoader()->getType(ref.type.sourceUrl()); + if (ref.typeData->status() == QQmlDataBlob::ResolvingDependencies) { + // TODO: give an error message? If so, we should record and show the path of the cycle. + continue; + } addDependency(ref.typeData); ref.prefix = csRef.prefix; diff --git a/src/qml/qml/qqmltypeloader_p.h b/src/qml/qml/qqmltypeloader_p.h index ef63e02b4f..22ac61968f 100644 --- a/src/qml/qml/qqmltypeloader_p.h +++ b/src/qml/qml/qqmltypeloader_p.h @@ -98,6 +98,7 @@ public: Null, // Prior to QQmlTypeLoader::load() Loading, // Prior to data being received and dataReceived() being called WaitingForDependencies, // While there are outstanding addDependency()s + ResolvingDependencies, // While resolving outstanding dependencies, to detect cycles Complete, // Finished Error // Error }; -- cgit v1.2.3