diff options
Diffstat (limited to 'src/qml/jsruntime/qv4engine.cpp')
-rw-r--r-- | src/qml/jsruntime/qv4engine.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/qml/jsruntime/qv4engine.cpp b/src/qml/jsruntime/qv4engine.cpp index f5dca60559..0a564fc6d5 100644 --- a/src/qml/jsruntime/qv4engine.cpp +++ b/src/qml/jsruntime/qv4engine.cpp @@ -1892,6 +1892,25 @@ int ExecutionEngine::maxGCStackSize() const return m_maxGCStackSize; } +/*! + \internal + Returns \a length converted to int if its safe to + pass to \c Scope::alloc. + Otherwise it throws a RangeError, and returns 0. + */ +int ExecutionEngine::safeForAllocLength(qint64 len64) +{ + if (len64 < 0ll || len64 > qint64(std::numeric_limits<int>::max())) { + this->throwRangeError(QStringLiteral("Invalid array length.")); + return 0; + } + if (len64 > qint64(this->jsStackLimit - this->jsStackTop)) { + this->throwRangeError(QStringLiteral("Array too large for apply().")); + return 0; + } + return len64; +} + ReturnedValue ExecutionEngine::global() { return globalObject->asReturnedValue(); |