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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#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
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