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 | { |
35 | WriteBarrier::HeapObjectWrapper<CompilationUnitRuntimeData, 1> compilationUnit; |
36 | |
37 | // Intentionally require an ExecutableCompilationUnit but save only a pointer to |
38 | // CompilationUnitBase. This is so that we can take advantage of the standard layout |
39 | // of CompilationUnitBase in the JIT. Furthermore we can safely static_cast to |
40 | // ExecutableCompilationUnit where we need it. |
41 | FunctionData(EngineBase *engine, ExecutableCompilationUnit *compilationUnit_); |
42 | }; |
43 | // Make sure this class can be accessed through offsetof (done by the assemblers): |
44 | Q_STATIC_ASSERT(std::is_standard_layout< FunctionData >::value); |
45 | |
46 | struct Q_QML_EXPORT Function : public FunctionData { |
47 | protected: |
48 | Function(ExecutionEngine *engine, ExecutableCompilationUnit *unit, |
49 | const CompiledData::Function *function, const QQmlPrivate::AOTCompiledFunction *aotFunction); |
50 | ~Function(); |
51 | |
52 | public: |
53 | struct JSTypedFunction { |
54 | QVarLengthArray<QQmlType, 4> types; |
55 | }; |
56 | |
57 | struct AOTCompiledFunction { |
58 | QVarLengthArray<QMetaType, 4> types; |
59 | }; |
60 | |
61 | QV4::ExecutableCompilationUnit *executableCompilationUnit() const |
62 | { |
63 | // This is safe: We require an ExecutableCompilationUnit in the ctor. |
64 | return static_cast<QV4::ExecutableCompilationUnit *>(compilationUnit.get()); |
65 | } |
66 | |
67 | QV4::Heap::String *runtimeString(uint i) const |
68 | { |
69 | return compilationUnit->runtimeStrings[i]; |
70 | } |
71 | |
72 | bool call(QObject *thisObject, void **a, const QMetaType *types, int argc, |
73 | ExecutionContext *context); |
74 | ReturnedValue call(const Value *thisObject, const Value *argv, int argc, |
75 | ExecutionContext *context); |
76 | |
77 | const CompiledData::Function *compiledFunction = nullptr; |
78 | const char *codeData = nullptr; |
79 | JSC::MacroAssemblerCodeRef *codeRef = nullptr; |
80 | |
81 | typedef ReturnedValue (*JittedCode)(CppStackFrame *, ExecutionEngine *); |
82 | typedef void (*AotCompiledCode)(const QQmlPrivate::AOTCompiledContext *context, void **argv); |
83 | |
84 | union { |
85 | void *noFunction = nullptr; |
86 | JSTypedFunction jsTypedFunction; |
87 | AOTCompiledFunction aotCompiledFunction; |
88 | }; |
89 | |
90 | union { |
91 | JittedCode jittedCode = nullptr; |
92 | AotCompiledCode aotCompiledCode; |
93 | }; |
94 | |
95 | // first nArguments names in internalClass are the actual arguments |
96 | QV4::WriteBarrier::Pointer<Heap::InternalClass> internalClass; |
97 | int interpreterCallCount = 0; |
98 | quint16 nFormals = 0; |
99 | enum Kind : quint8 { JsUntyped, JsTyped, AotCompiled, Eval }; |
100 | Kind kind = JsUntyped; |
101 | bool detectedInjectedParameters = false; |
102 | |
103 | static Function *create(ExecutionEngine *engine, ExecutableCompilationUnit *unit, |
104 | const CompiledData::Function *function, |
105 | const QQmlPrivate::AOTCompiledFunction *aotFunction); |
106 | void destroy(); |
107 | |
108 | void mark(QV4::MarkStack *ms); |
109 | |
110 | // used when dynamically assigning signal handlers (QQmlConnection) |
111 | void updateInternalClass(ExecutionEngine *engine, const QList<QByteArray> ¶meters); |
112 | |
113 | inline Heap::String *name() const { |
114 | return runtimeString(i: compiledFunction->nameIndex); |
115 | } |
116 | |
117 | static QString prettyName(const Function *function, const void *address); |
118 | |
119 | inline QString sourceFile() const { return executableCompilationUnit()->fileName(); } |
120 | inline QUrl finalUrl() const { return executableCompilationUnit()->finalUrl(); } |
121 | |
122 | inline bool isStrict() const { return compiledFunction->flags & CompiledData::Function::IsStrict; } |
123 | inline bool isArrowFunction() const { return compiledFunction->flags & CompiledData::Function::IsArrowFunction; } |
124 | inline bool isGenerator() const { return compiledFunction->flags & CompiledData::Function::IsGenerator; } |
125 | inline bool isClosureWrapper() const { return compiledFunction->flags & CompiledData::Function::IsClosureWrapper; } |
126 | |
127 | QQmlSourceLocation sourceLocation() const; |
128 | |
129 | Function *nestedFunction() const |
130 | { |
131 | if (compiledFunction->nestedFunctionIndex == std::numeric_limits<uint32_t>::max()) |
132 | return nullptr; |
133 | return executableCompilationUnit()->runtimeFunctions[compiledFunction->nestedFunctionIndex]; |
134 | } |
135 | }; |
136 | |
137 | } |
138 | |
139 | QT_END_NAMESPACE |
140 | |
141 | #endif |
142 | |