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| ****************************************************************************/ |
| #ifndef QV4FUNCTION_H |
| #define QV4FUNCTION_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists purely as an |
| // implementation detail. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include "qv4global_p.h" |
| #include <private/qv4executablecompilationunit_p.h> |
| #include <private/qv4context_p.h> |
| #include <private/qv4string_p.h> |
| |
| namespace JSC { |
| class MacroAssemblerCodeRef; |
| } |
| |
| QT_BEGIN_NAMESPACE |
| |
| struct QQmlSourceLocation; |
| |
| namespace QV4 { |
| |
| struct Q_QML_EXPORT FunctionData { |
| CompiledData::CompilationUnitBase *compilationUnit; |
| |
| // Intentionally require an ExecutableCompilationUnit but save only a pointer to |
| // CompilationUnitBase. This is so that we can take advantage of the standard layout |
| // of CompilationUnitBase in the JIT. Furthermore we can safely static_cast to |
| // ExecutableCompilationUnit where we need it. |
| FunctionData(ExecutableCompilationUnit *compilationUnit) |
| : compilationUnit(compilationUnit) |
| {} |
| }; |
| // Make sure this class can be accessed through offsetof (done by the assemblers): |
| Q_STATIC_ASSERT(std::is_standard_layout< FunctionData >::value); |
| |
| struct Q_QML_EXPORT Function : public FunctionData { |
| private: |
| Function(ExecutionEngine *engine, ExecutableCompilationUnit *unit, |
| const CompiledData::Function *function); |
| ~Function(); |
| |
| public: |
| const CompiledData::Function *compiledFunction; |
| |
| QV4::ExecutableCompilationUnit *executableCompilationUnit() const |
| { |
| // This is safe: We require an ExecutableCompilationUnit in the ctor. |
| return static_cast<QV4::ExecutableCompilationUnit *>(compilationUnit); |
| } |
| |
| QV4::Heap::String *runtimeString(uint i) const |
| { |
| return compilationUnit->runtimeStrings[i]; |
| } |
| |
| ReturnedValue call(const Value *thisObject, const Value *argv, int argc, const ExecutionContext *context); |
| |
| const char *codeData; |
| |
| typedef ReturnedValue (*JittedCode)(CppStackFrame *, ExecutionEngine *); |
| JittedCode jittedCode; |
| JSC::MacroAssemblerCodeRef *codeRef; |
| |
| // first nArguments names in internalClass are the actual arguments |
| Heap::InternalClass *internalClass; |
| uint nFormals; |
| int interpreterCallCount = 0; |
| bool isEval = false; |
| |
| static Function *create(ExecutionEngine *engine, ExecutableCompilationUnit *unit, |
| const CompiledData::Function *function); |
| void destroy(); |
| |
| // used when dynamically assigning signal handlers (QQmlConnection) |
| void updateInternalClass(ExecutionEngine *engine, const QList<QByteArray> ¶meters); |
| |
| inline Heap::String *name() const { |
| return runtimeString(compiledFunction->nameIndex); |
| } |
| |
| static QString prettyName(const Function *function, const void *address); |
| |
| inline QString sourceFile() const { return executableCompilationUnit()->fileName(); } |
| inline QUrl finalUrl() const { return executableCompilationUnit()->finalUrl(); } |
| |
| inline bool isStrict() const { return compiledFunction->flags & CompiledData::Function::IsStrict; } |
| inline bool isArrowFunction() const { return compiledFunction->flags & CompiledData::Function::IsArrowFunction; } |
| inline bool isGenerator() const { return compiledFunction->flags & CompiledData::Function::IsGenerator; } |
| |
| QQmlSourceLocation sourceLocation() const; |
| |
| Function *nestedFunction() const |
| { |
| if (compiledFunction->nestedFunctionIndex == std::numeric_limits<uint32_t>::max()) |
| return nullptr; |
| return executableCompilationUnit()->runtimeFunctions[compiledFunction->nestedFunctionIndex]; |
| } |
| }; |
| |
| } |
| |
| QT_END_NAMESPACE |
| |
| #endif |