1 | // Copyright (C) 2016 The Qt Company Ltd. |
2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
3 | #ifndef QV4FUNCTION_H |
4 | #define QV4FUNCTION_H |
5 | |
6 | // |
7 | // W A R N I N G |
8 | // ------------- |
9 | // |
10 | // This file is not part of the Qt API. It exists purely as an |
11 | // implementation detail. This header file may change from version to |
12 | // version without notice, or even be removed. |
13 | // |
14 | // We mean it. |
15 | // |
16 | |
17 | #include <qqmlprivate.h> |
18 | #include "qv4global_p.h" |
19 | #include <private/qv4executablecompilationunit_p.h> |
20 | #include <private/qv4context_p.h> |
21 | #include <private/qv4string_p.h> |
22 | |
23 | namespace JSC { |
24 | class MacroAssemblerCodeRef; |
25 | } |
26 | |
27 | QT_BEGIN_NAMESPACE |
28 | |
29 | struct QQmlSourceLocation; |
30 | |
31 | namespace QV4 { |
32 | |
33 | struct Q_QML_EXPORT FunctionData { |
34 | CompiledData::CompilationUnitBase *compilationUnit; |
35 | |
36 | // Intentionally require an ExecutableCompilationUnit but save only a pointer to |
37 | // CompilationUnitBase. This is so that we can take advantage of the standard layout |
38 | // of CompilationUnitBase in the JIT. Furthermore we can safely static_cast to |
39 | // ExecutableCompilationUnit where we need it. |
40 | FunctionData(ExecutableCompilationUnit *compilationUnit) |
41 | : compilationUnit(compilationUnit) |
42 | {} |
43 | }; |
44 | // Make sure this class can be accessed through offsetof (done by the assemblers): |
45 | Q_STATIC_ASSERT(std::is_standard_layout< FunctionData >::value); |
46 | |
47 | struct Q_QML_EXPORT Function : public FunctionData { |
48 | protected: |
49 | Function(ExecutionEngine *engine, ExecutableCompilationUnit *unit, |
50 | const CompiledData::Function *function, const QQmlPrivate::AOTCompiledFunction *aotFunction); |
51 | ~Function(); |
52 | |
53 | public: |
54 | const CompiledData::Function *compiledFunction; |
55 | |
56 | QV4::ExecutableCompilationUnit *executableCompilationUnit() const |
57 | { |
58 | // This is safe: We require an ExecutableCompilationUnit in the ctor. |
59 | return static_cast<QV4::ExecutableCompilationUnit *>(compilationUnit); |
60 | } |
61 | |
62 | QV4::Heap::String *runtimeString(uint i) const |
63 | { |
64 | return compilationUnit->runtimeStrings[i]; |
65 | } |
66 | |
67 | bool call(QObject *thisObject, void **a, const QMetaType *types, int argc, |
68 | ExecutionContext *context); |
69 | ReturnedValue call(const Value *thisObject, const Value *argv, int argc, |
70 | ExecutionContext *context); |
71 | |
72 | const char *codeData; |
73 | |
74 | typedef ReturnedValue (*JittedCode)(CppStackFrame *, ExecutionEngine *); |
75 | JittedCode jittedCode; |
76 | JSC::MacroAssemblerCodeRef *codeRef; |
77 | const QQmlPrivate::AOTCompiledFunction *aotCompiledFunction = nullptr; |
78 | |
79 | // first nArguments names in internalClass are the actual arguments |
80 | Heap::InternalClass *internalClass; |
81 | int interpreterCallCount = 0; |
82 | quint16 nFormals; |
83 | enum Kind : quint8 { JsUntyped, JsTyped, AotCompiled, Eval }; |
84 | Kind kind = JsUntyped; |
85 | bool detectedInjectedParameters = false; |
86 | |
87 | static Function *create(ExecutionEngine *engine, ExecutableCompilationUnit *unit, |
88 | const CompiledData::Function *function, |
89 | const QQmlPrivate::AOTCompiledFunction *aotFunction); |
90 | void destroy(); |
91 | |
92 | // used when dynamically assigning signal handlers (QQmlConnection) |
93 | void updateInternalClass(ExecutionEngine *engine, const QList<QByteArray> ¶meters); |
94 | |
95 | inline Heap::String *name() const { |
96 | return runtimeString(i: compiledFunction->nameIndex); |
97 | } |
98 | |
99 | static QString prettyName(const Function *function, const void *address); |
100 | |
101 | inline QString sourceFile() const { return executableCompilationUnit()->fileName(); } |
102 | inline QUrl finalUrl() const { return executableCompilationUnit()->finalUrl(); } |
103 | |
104 | inline bool isStrict() const { return compiledFunction->flags & CompiledData::Function::IsStrict; } |
105 | inline bool isArrowFunction() const { return compiledFunction->flags & CompiledData::Function::IsArrowFunction; } |
106 | inline bool isGenerator() const { return compiledFunction->flags & CompiledData::Function::IsGenerator; } |
107 | inline bool isClosureWrapper() const { return compiledFunction->flags & CompiledData::Function::IsClosureWrapper; } |
108 | |
109 | QQmlSourceLocation sourceLocation() const; |
110 | |
111 | Function *nestedFunction() const |
112 | { |
113 | if (compiledFunction->nestedFunctionIndex == std::numeric_limits<uint32_t>::max()) |
114 | return nullptr; |
115 | return executableCompilationUnit()->runtimeFunctions[compiledFunction->nestedFunctionIndex]; |
116 | } |
117 | }; |
118 | |
119 | } |
120 | |
121 | QT_END_NAMESPACE |
122 | |
123 | #endif |
124 | |