diff options
Diffstat (limited to 'src/qml/jsruntime/qv4engine_p.h')
-rw-r--r-- | src/qml/jsruntime/qv4engine_p.h | 35 |
1 files changed, 25 insertions, 10 deletions
diff --git a/src/qml/jsruntime/qv4engine_p.h b/src/qml/jsruntime/qv4engine_p.h index 7da4a1c3c1..73d506c4d2 100644 --- a/src/qml/jsruntime/qv4engine_p.h +++ b/src/qml/jsruntime/qv4engine_p.h @@ -81,15 +81,11 @@ namespace CompiledData { struct CompilationUnit; } -#define CHECK_STACK_LIMITS(v4) \ - if ((v4->jsStackTop <= v4->jsStackLimit) && (reinterpret_cast<quintptr>(&v4) >= v4->cStackLimit || v4->recheckCStackLimits())) {} \ - else \ - return v4->throwRangeError(QStringLiteral("Maximum call stack size exceeded.")) - - struct Q_QML_EXPORT ExecutionEngine { private: + static qint32 maxCallDepth; + friend struct ExecutionContextSaver; friend struct ExecutionContext; friend struct Heap::ExecutionContext; @@ -98,6 +94,7 @@ public: Value *jsStackTop; quint32 hasException; + qint32 callDepth; MemoryManager *memoryManager; ExecutableAllocator *executableAllocator; @@ -107,7 +104,6 @@ public: ExecutionContext *currentContext; Value *jsStackLimit; - quintptr cStackLimit; WTF::BumpPointerAllocator *bumperPointerAllocator; // Used by Yarr Regex engine. @@ -437,8 +433,6 @@ public: InternalClass *newClass(const InternalClass &other); - bool recheckCStackLimits(); - // Exception handling Value *exceptionValue; StackTrace exceptionStackTrace; @@ -471,6 +465,8 @@ public: QV4::ReturnedValue metaTypeToJS(int type, const void *data); void assertObjectBelongsToEngine(const Heap::Base &baseObject); + + bool checkStackLimits(ReturnedValue &exception); }; inline void ExecutionEngine::pushContext(Heap::ExecutionContext *context) @@ -516,7 +512,7 @@ inline Heap::QmlContext *ExecutionEngine::qmlContext() const if (ctx->type == Heap::ExecutionContext::Type_SimpleCallContext && !ctx->outer) ctx = parentContext(currentContext)->d(); - if (!ctx->outer) + if (ctx->type != Heap::ExecutionContext::Type_QmlContext && !ctx->outer) return 0; while (ctx->outer && ctx->outer->type != Heap::ExecutionContext::Type_GlobalContext) @@ -552,7 +548,26 @@ inline void Value::mark(ExecutionEngine *e) o->mark(e); } +#define CHECK_STACK_LIMITS(v4) { ReturnedValue e; if ((v4)->checkStackLimits(e)) return e; } \ + ExecutionEngineCallDepthRecorder _executionEngineCallDepthRecorder(v4); + +struct ExecutionEngineCallDepthRecorder +{ + ExecutionEngine *ee; + ExecutionEngineCallDepthRecorder(ExecutionEngine *e): ee(e) { ++ee->callDepth; } + ~ExecutionEngineCallDepthRecorder() { --ee->callDepth; } +}; + +inline bool ExecutionEngine::checkStackLimits(ReturnedValue &exception) +{ + if (Q_UNLIKELY((jsStackTop > jsStackLimit) || (callDepth >= maxCallDepth))) { + exception = throwRangeError(QStringLiteral("Maximum call stack size exceeded.")); + return true; + } + + return false; +} } // namespace QV4 |