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39 | #ifndef QV4FUNCTION_H |
40 | #define QV4FUNCTION_H |
41 | |
42 | // |
43 | // W A R N I N G |
44 | // ------------- |
45 | // |
46 | // This file is not part of the Qt API. It exists purely as an |
47 | // implementation detail. This header file may change from version to |
48 | // version without notice, or even be removed. |
49 | // |
50 | // We mean it. |
51 | // |
52 | |
53 | #include "qv4global_p.h" |
54 | #include <private/qv4executablecompilationunit_p.h> |
55 | #include <private/qv4context_p.h> |
56 | #include <private/qv4string_p.h> |
57 | |
58 | namespace JSC { |
59 | class MacroAssemblerCodeRef; |
60 | } |
61 | |
62 | QT_BEGIN_NAMESPACE |
63 | |
64 | struct QQmlSourceLocation; |
65 | |
66 | namespace QV4 { |
67 | |
68 | struct Q_QML_EXPORT FunctionData { |
69 | CompiledData::CompilationUnitBase *compilationUnit; |
70 | |
71 | // Intentionally require an ExecutableCompilationUnit but save only a pointer to |
72 | // CompilationUnitBase. This is so that we can take advantage of the standard layout |
73 | // of CompilationUnitBase in the JIT. Furthermore we can safely static_cast to |
74 | // ExecutableCompilationUnit where we need it. |
75 | FunctionData(ExecutableCompilationUnit *compilationUnit) |
76 | : compilationUnit(compilationUnit) |
77 | {} |
78 | }; |
79 | // Make sure this class can be accessed through offsetof (done by the assemblers): |
80 | Q_STATIC_ASSERT(std::is_standard_layout< FunctionData >::value); |
81 | |
82 | struct Q_QML_EXPORT Function : public FunctionData { |
83 | private: |
84 | Function(ExecutionEngine *engine, ExecutableCompilationUnit *unit, |
85 | const CompiledData::Function *function); |
86 | ~Function(); |
87 | |
88 | public: |
89 | const CompiledData::Function *compiledFunction; |
90 | |
91 | QV4::ExecutableCompilationUnit *executableCompilationUnit() const |
92 | { |
93 | // This is safe: We require an ExecutableCompilationUnit in the ctor. |
94 | return static_cast<QV4::ExecutableCompilationUnit *>(compilationUnit); |
95 | } |
96 | |
97 | QV4::Heap::String *runtimeString(uint i) const |
98 | { |
99 | return compilationUnit->runtimeStrings[i]; |
100 | } |
101 | |
102 | ReturnedValue call(const Value *thisObject, const Value *argv, int argc, const ExecutionContext *context); |
103 | |
104 | const char *codeData; |
105 | |
106 | typedef ReturnedValue (*JittedCode)(CppStackFrame *, ExecutionEngine *); |
107 | JittedCode jittedCode; |
108 | JSC::MacroAssemblerCodeRef *codeRef; |
109 | |
110 | // first nArguments names in internalClass are the actual arguments |
111 | Heap::InternalClass *internalClass; |
112 | uint nFormals; |
113 | int interpreterCallCount = 0; |
114 | bool isEval = false; |
115 | |
116 | static Function *create(ExecutionEngine *engine, ExecutableCompilationUnit *unit, |
117 | const CompiledData::Function *function); |
118 | void destroy(); |
119 | |
120 | // used when dynamically assigning signal handlers (QQmlConnection) |
121 | void updateInternalClass(ExecutionEngine *engine, const QList<QByteArray> ¶meters); |
122 | |
123 | inline Heap::String *name() const { |
124 | return runtimeString(i: compiledFunction->nameIndex); |
125 | } |
126 | |
127 | static QString prettyName(const Function *function, const void *address); |
128 | |
129 | inline QString sourceFile() const { return executableCompilationUnit()->fileName(); } |
130 | inline QUrl finalUrl() const { return executableCompilationUnit()->finalUrl(); } |
131 | |
132 | inline bool isStrict() const { return compiledFunction->flags & CompiledData::Function::IsStrict; } |
133 | inline bool isArrowFunction() const { return compiledFunction->flags & CompiledData::Function::IsArrowFunction; } |
134 | inline bool isGenerator() const { return compiledFunction->flags & CompiledData::Function::IsGenerator; } |
135 | |
136 | QQmlSourceLocation sourceLocation() const; |
137 | |
138 | Function *nestedFunction() const |
139 | { |
140 | if (compiledFunction->nestedFunctionIndex == std::numeric_limits<uint32_t>::max()) |
141 | return nullptr; |
142 | return executableCompilationUnit()->runtimeFunctions[compiledFunction->nestedFunctionIndex]; |
143 | } |
144 | }; |
145 | |
146 | } |
147 | |
148 | QT_END_NAMESPACE |
149 | |
150 | #endif |
151 | |