8ee54eeb79ef08893a3f8d93986be383a697e0cb
[WebKit-https.git] / Source / JavaScriptCore / builtins / BuiltinExecutables.cpp
1 /*
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5  * modification, are permitted provided that the following conditions
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10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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25
26
27 #include "config.h"
28 #include "BuiltinExecutables.h"
29
30 #include "BuiltinNames.h"
31 #include "Executable.h"
32 #include "JSCInlines.h"
33 #include "Parser.h"
34 #include <wtf/NeverDestroyed.h>
35
36 namespace JSC {
37
38 static UnlinkedFunctionExecutable* createExecutableInternal(VM&, const SourceCode&, const Identifier&, ConstructorKind, ConstructAbility);
39
40 BuiltinExecutables::BuiltinExecutables(VM& vm)
41     : m_vm(vm)
42 #define INITIALIZE_BUILTIN_SOURCE_MEMBERS(name, functionName, length) , m_##name##Source(makeSource(StringImpl::createFromLiteral(s_##name, length)))
43     JSC_FOREACH_BUILTIN_CODE(INITIALIZE_BUILTIN_SOURCE_MEMBERS)
44 #undef EXPOSE_BUILTIN_STRINGS
45 {
46 }
47
48 UnlinkedFunctionExecutable* BuiltinExecutables::createDefaultConstructor(ConstructorKind constructorKind, const Identifier& name)
49 {
50     static NeverDestroyed<const String> baseConstructorCode(ASCIILiteral("(function () { })"));
51     static NeverDestroyed<const String> derivedConstructorCode(ASCIILiteral("(function () { super(...arguments); })"));
52
53     switch (constructorKind) {
54     case ConstructorKind::None:
55         break;
56     case ConstructorKind::Base:
57         return createExecutableInternal(m_vm, makeSource(baseConstructorCode), name, constructorKind, ConstructAbility::CanConstruct);
58     case ConstructorKind::Derived:
59         return createExecutableInternal(m_vm, makeSource(derivedConstructorCode), name, constructorKind, ConstructAbility::CanConstruct);
60     }
61     ASSERT_NOT_REACHED();
62     return nullptr;
63 }
64
65 UnlinkedFunctionExecutable* BuiltinExecutables::createBuiltinExecutable(const SourceCode& code, const Identifier& name, ConstructAbility constructAbility)
66 {
67     return createExecutableInternal(m_vm, code, name, ConstructorKind::None, constructAbility);
68 }
69
70 UnlinkedFunctionExecutable* createBuiltinExecutable(VM& vm, const SourceCode& code, const Identifier& name, ConstructAbility constructAbility)
71 {
72     return createExecutableInternal(vm, code, name, ConstructorKind::None, constructAbility);
73 }
74
75 UnlinkedFunctionExecutable* createExecutableInternal(VM& vm, const SourceCode& source, const Identifier& name, ConstructorKind constructorKind, ConstructAbility constructAbility)
76 {
77     JSTextPosition positionBeforeLastNewline;
78     ParserError error;
79     bool isParsingDefaultConstructor = constructorKind != ConstructorKind::None;
80     JSParserBuiltinMode builtinMode = isParsingDefaultConstructor ? JSParserBuiltinMode::NotBuiltin : JSParserBuiltinMode::Builtin;
81     UnlinkedFunctionKind kind = isParsingDefaultConstructor ? UnlinkedNormalFunction : UnlinkedBuiltinFunction;
82     RefPtr<SourceProvider> sourceOverride = isParsingDefaultConstructor ? source.provider() : nullptr;
83     std::unique_ptr<ProgramNode> program = parse<ProgramNode>(
84         &vm, source, Identifier(), builtinMode,
85         JSParserStrictMode::NotStrict, SourceParseMode::ProgramMode, SuperBinding::NotNeeded, error,
86         &positionBeforeLastNewline, constructorKind);
87
88     if (!program) {
89         dataLog("Fatal error compiling builtin function '", name.string(), "': ", error.message());
90         CRASH();
91     }
92
93     StatementNode* exprStatement = program->singleStatement();
94     RELEASE_ASSERT(exprStatement);
95     RELEASE_ASSERT(exprStatement->isExprStatement());
96     ExpressionNode* funcExpr = static_cast<ExprStatementNode*>(exprStatement)->expr();
97     RELEASE_ASSERT(funcExpr);
98     RELEASE_ASSERT(funcExpr->isFuncExprNode());
99     FunctionMetadataNode* metadata = static_cast<FuncExprNode*>(funcExpr)->metadata();
100     RELEASE_ASSERT(!program->hasCapturedVariables());
101     
102     metadata->setEndPosition(positionBeforeLastNewline);
103     RELEASE_ASSERT(metadata);
104     RELEASE_ASSERT(metadata->ident().isNull());
105     
106     // This function assumes an input string that would result in a single anonymous function expression.
107     metadata->setEndPosition(positionBeforeLastNewline);
108     RELEASE_ASSERT(metadata);
109     metadata->overrideName(name);
110     VariableEnvironment dummyTDZVariables;
111     UnlinkedFunctionExecutable* functionExecutable = UnlinkedFunctionExecutable::create(&vm, source, metadata, kind, constructAbility, dummyTDZVariables, DerivedContextType::None, WTFMove(sourceOverride));
112     return functionExecutable;
113 }
114
115 void BuiltinExecutables::finalize(Handle<Unknown>, void* context)
116 {
117     static_cast<Weak<UnlinkedFunctionExecutable>*>(context)->clear();
118 }
119
120 #define DEFINE_BUILTIN_EXECUTABLES(name, functionName, length) \
121 UnlinkedFunctionExecutable* BuiltinExecutables::name##Executable() \
122 {\
123     if (!m_##name##Executable)\
124         m_##name##Executable = Weak<UnlinkedFunctionExecutable>(createBuiltinExecutable(m_##name##Source, m_vm.propertyNames->builtinNames().functionName##PublicName(), s_##name##ConstructAbility), this, &m_##name##Executable);\
125     return m_##name##Executable.get();\
126 }
127 JSC_FOREACH_BUILTIN_CODE(DEFINE_BUILTIN_EXECUTABLES)
128 #undef EXPOSE_BUILTIN_SOURCES
129
130 }