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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#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 <qqmlprivate.h>
#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
{
WriteBarrier::HeapObjectWrapper<CompilationUnitRuntimeData, 1> 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(EngineBase *engine, ExecutableCompilationUnit *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 {
protected:
Function(ExecutionEngine *engine, ExecutableCompilationUnit *unit,
const CompiledData::Function *function, const QQmlPrivate::AOTCompiledFunction *aotFunction);
~Function();
public:
struct JSTypedFunction {
QVarLengthArray<QQmlType, 4> types;
};
struct AOTCompiledFunction {
QVarLengthArray<QMetaType, 4> types;
};
QV4::ExecutableCompilationUnit *executableCompilationUnit() const
{
// This is safe: We require an ExecutableCompilationUnit in the ctor.
return static_cast<QV4::ExecutableCompilationUnit *>(compilationUnit.get());
}
QV4::Heap::String *runtimeString(uint i) const
{
return compilationUnit->runtimeStrings[i];
}
bool call(QObject *thisObject, void **a, const QMetaType *types, int argc,
ExecutionContext *context);
ReturnedValue call(const Value *thisObject, const Value *argv, int argc,
ExecutionContext *context);
const CompiledData::Function *compiledFunction = nullptr;
const char *codeData = nullptr;
JSC::MacroAssemblerCodeRef *codeRef = nullptr;
typedef ReturnedValue (*JittedCode)(CppStackFrame *, ExecutionEngine *);
typedef void (*AotCompiledCode)(const QQmlPrivate::AOTCompiledContext *context, void **argv);
union {
void *noFunction = nullptr;
JSTypedFunction jsTypedFunction;
AOTCompiledFunction aotCompiledFunction;
};
union {
JittedCode jittedCode = nullptr;
AotCompiledCode aotCompiledCode;
};
// first nArguments names in internalClass are the actual arguments
QV4::WriteBarrier::Pointer<Heap::InternalClass> internalClass;
int interpreterCallCount = 0;
quint16 nFormals = 0;
enum Kind : quint8 { JsUntyped, JsTyped, AotCompiled, Eval };
Kind kind = JsUntyped;
bool detectedInjectedParameters = false;
static Function *create(ExecutionEngine *engine, ExecutableCompilationUnit *unit,
const CompiledData::Function *function,
const QQmlPrivate::AOTCompiledFunction *aotFunction);
void destroy();
void mark(QV4::MarkStack *ms);
// 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; }
inline bool isClosureWrapper() const { return compiledFunction->flags & CompiledData::Function::IsClosureWrapper; }
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
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