From 5ef44cf6484b9dfd49c0174ac2969a29587a1bbd Mon Sep 17 00:00:00 2001 From: janekptacijarabaci Date: Mon, 19 Mar 2018 15:47:10 +0100 Subject: Part 1: Implement ES6 function name property semantics Issue #78 --- js/src/builtin/ModuleObject.cpp | 2 +- js/src/builtin/ReflectParse.cpp | 2 +- js/src/frontend/BytecodeEmitter.cpp | 111 ++++++++++++++-- js/src/frontend/BytecodeEmitter.h | 11 +- js/src/frontend/FullParseHandler.h | 7 ++ js/src/frontend/ParseNode-inl.h | 2 +- js/src/frontend/ParseNode.cpp | 18 +++ js/src/frontend/ParseNode.h | 15 +++ js/src/frontend/Parser.cpp | 35 ++++-- js/src/frontend/SyntaxParseHandler.h | 3 + js/src/jsapi.cpp | 6 +- js/src/jscntxt.cpp | 2 +- js/src/jsfun.cpp | 109 +++++++++++++--- js/src/jsfun.h | 54 ++++++-- js/src/jsfuninlines.h | 2 +- .../ecma_6/Function/function-name-assignment.js | 139 +++++++++++++++++++++ .../tests/ecma_6/Function/function-name-binding.js | 54 ++++++++ .../tests/ecma_6/Function/function-name-class.js | 32 +++++ js/src/tests/ecma_6/Function/function-name-for.js | 31 +++++ .../tests/ecma_6/Function/function-name-method.js | 70 +++++++++++ .../ecma_6/Function/function-name-property.js | 58 +++++++++ js/src/vm/AsyncFunction.cpp | 5 +- js/src/vm/Debugger.cpp | 2 +- js/src/vm/GlobalObject.cpp | 4 +- js/src/vm/Interpreter.cpp | 22 +++- js/src/vm/Opcodes.h | 11 +- js/src/vm/SelfHosting.cpp | 8 +- js/src/vm/TypeInference.cpp | 2 +- js/src/vm/TypedArrayObject.cpp | 2 +- js/src/wasm/AsmJS.cpp | 12 +- 30 files changed, 750 insertions(+), 81 deletions(-) create mode 100644 js/src/tests/ecma_6/Function/function-name-assignment.js create mode 100644 js/src/tests/ecma_6/Function/function-name-binding.js create mode 100644 js/src/tests/ecma_6/Function/function-name-class.js create mode 100644 js/src/tests/ecma_6/Function/function-name-for.js create mode 100644 js/src/tests/ecma_6/Function/function-name-method.js create mode 100644 js/src/tests/ecma_6/Function/function-name-property.js (limited to 'js') diff --git a/js/src/builtin/ModuleObject.cpp b/js/src/builtin/ModuleObject.cpp index 3bfc8f60b..40fd008b9 100644 --- a/js/src/builtin/ModuleObject.cpp +++ b/js/src/builtin/ModuleObject.cpp @@ -1205,7 +1205,7 @@ ModuleBuilder::processExport(frontend::ParseNode* pn) case PNK_FUNCTION: { RootedFunction func(cx_, kid->pn_funbox->function()); if (!func->isArrow()) { - RootedAtom localName(cx_, func->name()); + RootedAtom localName(cx_, func->explicitName()); RootedAtom exportName(cx_, isDefault ? cx_->names().default_ : localName.get()); MOZ_ASSERT_IF(isDefault, localName); if (!appendExportEntry(exportName, localName)) diff --git a/js/src/builtin/ReflectParse.cpp b/js/src/builtin/ReflectParse.cpp index e150ed729..eef6fd7ec 100644 --- a/js/src/builtin/ReflectParse.cpp +++ b/js/src/builtin/ReflectParse.cpp @@ -3415,7 +3415,7 @@ ASTSerializer::function(ParseNode* pn, ASTType type, MutableHandleValue dst) #endif RootedValue id(cx); - RootedAtom funcAtom(cx, func->name()); + RootedAtom funcAtom(cx, func->explicitName()); if (!optIdentifier(funcAtom, nullptr, &id)) return false; diff --git a/js/src/frontend/BytecodeEmitter.cpp b/js/src/frontend/BytecodeEmitter.cpp index 0a1b4ffe1..205bbf3d9 100644 --- a/js/src/frontend/BytecodeEmitter.cpp +++ b/js/src/frontend/BytecodeEmitter.cpp @@ -4070,7 +4070,7 @@ BytecodeEmitter::isRunOnceLambda() FunctionBox* funbox = sc->asFunctionBox(); return !funbox->argumentsHasLocalBinding() && !funbox->isGenerator() && - !funbox->function()->name(); + !funbox->function()->explicitName(); } bool @@ -4491,7 +4491,7 @@ BytecodeEmitter::emitIteratorNext(ParseNode* pn, bool allowSelfHosted) } bool -BytecodeEmitter::emitDefault(ParseNode* defaultExpr) +BytecodeEmitter::emitDefault(ParseNode* defaultExpr, ParseNode* pattern) { if (!emit1(JSOP_DUP)) // VALUE VALUE return false; @@ -4507,13 +4507,79 @@ BytecodeEmitter::emitDefault(ParseNode* defaultExpr) return false; if (!emit1(JSOP_POP)) // . return false; - if (!emitTreeInBranch(defaultExpr)) // DEFAULTVALUE + if (!emitInitializerInBranch(defaultExpr, pattern)) // DEFAULTVALUE return false; if (!emitJumpTargetAndPatch(jump)) return false; return true; } +bool +BytecodeEmitter::setOrEmitSetFunName(ParseNode* maybeFun, HandleAtom name, + FunctionPrefixKind prefixKind) +{ + if (maybeFun->isKind(PNK_FUNCTION)) { + // Function doesn't have 'name' property at this point. + // Set function's name at compile time. + RootedFunction fun(cx, maybeFun->pn_funbox->function()); + + // Single node can be emitted multiple times if it appears in + // array destructuring default. If function already has a name, + // just return. + if (fun->hasCompileTimeName()) { +#ifdef DEBUG + RootedAtom funName(cx, NameToFunctionName(cx, name, prefixKind)); + if (!funName) + return false; + MOZ_ASSERT(funName == maybeFun->pn_funbox->function()->compileTimeName()); +#endif + return true; + } + + RootedAtom funName(cx, NameToFunctionName(cx, name, prefixKind)); + if (!funName) + return false; + if (fun->hasGuessedAtom()) + fun->clearGuessedAtom(); + fun->setCompileTimeName(name); + return true; + } + + uint32_t nameIndex; + if (!makeAtomIndex(name, &nameIndex)) + return false; + if (!emitIndexOp(JSOP_STRING, nameIndex)) // FUN NAME + return false; + uint8_t kind = uint8_t(prefixKind); + if (!emit2(JSOP_SETFUNNAME, kind)) // FUN + return false; + return true; +} + +bool +BytecodeEmitter::emitInitializer(ParseNode* initializer, ParseNode* pattern) +{ + if (!emitTree(initializer)) + return false; + + if (!pattern->isInParens() && pattern->isKind(PNK_NAME) && + initializer->isDirectRHSAnonFunction()) + { + RootedAtom name(cx, pattern->name()); + if (!setOrEmitSetFunName(initializer, name, FunctionPrefixKind::None)) + return false; + } + + return true; +} + +bool +BytecodeEmitter::emitInitializerInBranch(ParseNode* initializer, ParseNode* pattern) +{ + TDZCheckCache tdzCache(this); + return emitInitializer(initializer, pattern); +} + class MOZ_STACK_CLASS IfThenElseEmitter { BytecodeEmitter* bce_; @@ -4834,7 +4900,7 @@ BytecodeEmitter::emitDestructuringOpsArray(ParseNode* pattern, DestructuringFlav if (pndefault) { // Emit only pndefault tree here, as undefined check in emitDefault // should always be true. - if (!emitTreeInBranch(pndefault)) // ... OBJ? ITER VALUE + if (!emitInitializerInBranch(pndefault, subpattern)) // ... OBJ? ITER VALUE return false; } else { if (!isElision) { @@ -4872,7 +4938,7 @@ BytecodeEmitter::emitDestructuringOpsArray(ParseNode* pattern, DestructuringFlav return false; if (pndefault) { - if (!emitDefault(pndefault)) // ... OBJ? ITER VALUE + if (!emitDefault(pndefault, subpattern)) // ... OBJ? ITER VALUE return false; } @@ -4980,7 +5046,7 @@ BytecodeEmitter::emitDestructuringOpsObject(ParseNode* pattern, DestructuringFla return false; if (subpattern->isKind(PNK_ASSIGN)) { - if (!emitDefault(subpattern->pn_right)) + if (!emitDefault(subpattern->pn_right, subpattern->pn_left)) return false; subpattern = subpattern->pn_left; } @@ -5094,7 +5160,7 @@ BytecodeEmitter::emitSingleDeclaration(ParseNode* declList, ParseNode* decl, if (!initializer && declList->isKind(PNK_VAR)) return true; - auto emitRhs = [initializer, declList](BytecodeEmitter* bce, const NameLocation&, bool) { + auto emitRhs = [initializer, declList, decl](BytecodeEmitter* bce, const NameLocation&, bool) if (!initializer) { // Lexical declarations are initialized to undefined without an // initializer. @@ -5105,7 +5171,7 @@ BytecodeEmitter::emitSingleDeclaration(ParseNode* declList, ParseNode* decl, } MOZ_ASSERT(initializer); - return bce->emitTree(initializer); + return bce->emitInitializer(initializer, decl); }; if (!emitInitializeName(decl, emitRhs)) @@ -5164,6 +5230,12 @@ BytecodeEmitter::emitAssignment(ParseNode* lhs, JSOp op, ParseNode* rhs) if (!EmitAssignmentRhs(bce, rhs, emittedBindOp ? 2 : 1)) return false; + if (!lhs->isInParens() && op == JSOP_NOP && rhs && rhs->isDirectRHSAnonFunction()) { + RootedAtom name(bce->cx, lhs->name()); + if (!bce->setOrEmitSetFunName(rhs, name, FunctionPrefixKind::None)) + return false; + } + // Emit the compound assignment op if there is one. if (op != JSOP_NOP && !bce->emit1(op)) return false; @@ -6283,8 +6355,8 @@ BytecodeEmitter::emitForIn(ParseNode* forInLoop, EmitterScope* headLexicalEmitte if (!updateSourceCoordNotes(decl->pn_pos.begin)) return false; - auto emitRhs = [initializer](BytecodeEmitter* bce, const NameLocation&, bool) { - return bce->emitTree(initializer); + auto emitRhs = [decl, initializer](BytecodeEmitter* bce, const NameLocation&, bool) { + return bce->emitInitializer(initializer, decl); }; if (!emitInitializeName(decl, emitRhs)) @@ -6903,7 +6975,7 @@ BytecodeEmitter::emitFunction(ParseNode* pn, bool needsProto) { FunctionBox* funbox = pn->pn_funbox; RootedFunction fun(cx, funbox->function()); - RootedAtom name(cx, fun->name()); + RootedAtom name(cx, fun->explicitName()); MOZ_ASSERT_IF(fun->isInterpretedLazy(), fun->lazyScript()); MOZ_ASSERT_IF(pn->isOp(JSOP_FUNWITHPROTO), needsProto); @@ -8532,6 +8604,10 @@ BytecodeEmitter::emitPropertyList(ParseNode* pn, MutableHandlePlainObject objp, op == JSOP_INITPROP_GETTER || op == JSOP_INITPROP_SETTER); + FunctionPrefixKind prefixKind = op == JSOP_INITPROP_GETTER ? FunctionPrefixKind::Get + : op == JSOP_INITPROP_SETTER ? FunctionPrefixKind::Set + : FunctionPrefixKind::None; + if (op == JSOP_INITPROP_GETTER || op == JSOP_INITPROP_SETTER) objp.set(nullptr); @@ -8573,6 +8649,12 @@ BytecodeEmitter::emitPropertyList(ParseNode* pn, MutableHandlePlainObject objp, case JSOP_INITHIDDENPROP_SETTER: op = JSOP_INITHIDDENELEM_SETTER; break; default: MOZ_CRASH("Invalid op"); } + if (propdef->pn_right->isDirectRHSAnonFunction()) { + if (!emitDupAt(1)) + return false; + if (!emit2(JSOP_SETFUNNAME, uint8_t(prefixKind))) + return false; + } if (!emit1(op)) return false; } else { @@ -8597,6 +8679,11 @@ BytecodeEmitter::emitPropertyList(ParseNode* pn, MutableHandlePlainObject objp, objp.set(nullptr); } + if (propdef->pn_right->isDirectRHSAnonFunction()) { + RootedAtom keyName(cx, key->pn_atom); + if (!setOrEmitSetFunName(propdef->pn_right, keyName, prefixKind)) + return false; + } if (!emitIndex32(op, index)) return false; } @@ -9017,7 +9104,7 @@ BytecodeEmitter::emitFunctionFormalParameters(ParseNode* pn) return false; if (!emit1(JSOP_POP)) return false; - if (!emitTreeInBranch(initializer)) + if (!emitInitializerInBranch(initializer, bindingElement)) return false; if (!emitJumpTargetAndPatch(jump)) return false; diff --git a/js/src/frontend/BytecodeEmitter.h b/js/src/frontend/BytecodeEmitter.h index 08e0eb54f..9a2ddb568 100644 --- a/js/src/frontend/BytecodeEmitter.h +++ b/js/src/frontend/BytecodeEmitter.h @@ -677,7 +677,16 @@ struct MOZ_STACK_CLASS BytecodeEmitter // Check if the value on top of the stack is "undefined". If so, replace // that value on the stack with the value defined by |defaultExpr|. - MOZ_MUST_USE bool emitDefault(ParseNode* defaultExpr); + // |pattern| is a lhs node of the default expression. If it's an + // identifier and |defaultExpr| is an anonymous function, |SetFunctionName| + // is called at compile time. + MOZ_MUST_USE bool emitDefault(ParseNode* defaultExpr, ParseNode* pattern); + + MOZ_MUST_USE bool setOrEmitSetFunName(ParseNode* maybeFun, HandleAtom name, + FunctionPrefixKind prefixKind); + + MOZ_MUST_USE bool emitInitializer(ParseNode* initializer, ParseNode* pattern); + MOZ_MUST_USE bool emitInitializerInBranch(ParseNode* initializer, ParseNode* pattern); MOZ_MUST_USE bool emitCallSiteObject(ParseNode* pn); MOZ_MUST_USE bool emitTemplateString(ParseNode* pn); diff --git a/js/src/frontend/FullParseHandler.h b/js/src/frontend/FullParseHandler.h index add881900..0fd137796 100644 --- a/js/src/frontend/FullParseHandler.h +++ b/js/src/frontend/FullParseHandler.h @@ -665,6 +665,11 @@ class FullParseHandler ParseNode* pn); inline void setLastFunctionFormalParameterDestructuring(ParseNode* funcpn, ParseNode* pn); + void checkAndSetIsDirectRHSAnonFunction(ParseNode* pn) { + if (IsAnonymousFunctionDefinition(pn)) + pn->setDirectRHSAnonFunction(true); + } + ParseNode* newFunctionDefinition() { return new_(PNK_FUNCTION, pos()); } @@ -942,6 +947,8 @@ FullParseHandler::setLastFunctionFormalParameterDefault(ParseNode* funcpn, Parse if (!pn) return false; + checkAndSetIsDirectRHSAnonFunction(defaultValue); + funcpn->pn_body->pn_pos.end = pn->pn_pos.end; ParseNode* pnchild = funcpn->pn_body->pn_head; ParseNode* pnlast = funcpn->pn_body->last(); diff --git a/js/src/frontend/ParseNode-inl.h b/js/src/frontend/ParseNode-inl.h index 395d09b5b..21bd83766 100644 --- a/js/src/frontend/ParseNode-inl.h +++ b/js/src/frontend/ParseNode-inl.h @@ -18,7 +18,7 @@ inline PropertyName* ParseNode::name() const { MOZ_ASSERT(isKind(PNK_FUNCTION) || isKind(PNK_NAME)); - JSAtom* atom = isKind(PNK_FUNCTION) ? pn_funbox->function()->name() : pn_atom; + JSAtom* atom = isKind(PNK_FUNCTION) ? pn_funbox->function()->explicitName() : pn_atom; return atom->asPropertyName(); } diff --git a/js/src/frontend/ParseNode.cpp b/js/src/frontend/ParseNode.cpp index f79baba9e..ece3a45df 100644 --- a/js/src/frontend/ParseNode.cpp +++ b/js/src/frontend/ParseNode.cpp @@ -902,3 +902,21 @@ FunctionBox::trace(JSTracer* trc) if (enclosingScope_) TraceRoot(trc, &enclosingScope_, "funbox-enclosingScope"); } + +bool +js::frontend::IsAnonymousFunctionDefinition(ParseNode* pn) +{ + // ES 2017 draft + // 12.15.2 (ArrowFunction, AsyncArrowFunction). + // 14.1.12 (FunctionExpression). + // 14.4.8 (GeneratorExpression). + // 14.6.8 (AsyncFunctionExpression) + if (pn->isKind(PNK_FUNCTION) && !pn->pn_funbox->function()->explicitName()) + return true; + + // 14.5.8 (ClassExpression) + if (pn->is() && !pn->as().names()) + return true; + + return false; +} diff --git a/js/src/frontend/ParseNode.h b/js/src/frontend/ParseNode.h index d37aaaae0..ff26279af 100644 --- a/js/src/frontend/ParseNode.h +++ b/js/src/frontend/ParseNode.h @@ -450,6 +450,9 @@ class ParseNode uint8_t pn_op; /* see JSOp enum and jsopcode.tbl */ uint8_t pn_arity:4; /* see ParseNodeArity enum */ bool pn_parens:1; /* this expr was enclosed in parens */ + bool pn_rhs_anon_fun:1; /* this expr is anonymous function or class that + * is a direct RHS of PNK_ASSIGN or PNK_COLON of + * property, that needs SetFunctionName. */ ParseNode(const ParseNode& other) = delete; void operator=(const ParseNode& other) = delete; @@ -460,6 +463,7 @@ class ParseNode pn_op(op), pn_arity(arity), pn_parens(false), + pn_rhs_anon_fun(false), pn_pos(0, 0), pn_next(nullptr) { @@ -472,6 +476,7 @@ class ParseNode pn_op(op), pn_arity(arity), pn_parens(false), + pn_rhs_anon_fun(false), pn_pos(pos), pn_next(nullptr) { @@ -512,6 +517,13 @@ class ParseNode bool isLikelyIIFE() const { return isInParens(); } void setInParens(bool enabled) { pn_parens = enabled; } + bool isDirectRHSAnonFunction() const { + return pn_rhs_anon_fun; + } + void setDirectRHSAnonFunction(bool enabled) { + pn_rhs_anon_fun = enabled; + } + TokenPos pn_pos; /* two 16-bit pairs here, for 64 bits */ ParseNode* pn_next; /* intrinsic link in parent PN_LIST */ @@ -1444,6 +1456,9 @@ FunctionFormalParametersList(ParseNode* fn, unsigned* numFormals) return argsBody->pn_head; } +bool +IsAnonymousFunctionDefinition(ParseNode* pn); + } /* namespace frontend */ } /* namespace js */ diff --git a/js/src/frontend/Parser.cpp b/js/src/frontend/Parser.cpp index 78e47ceb3..3106702cf 100644 --- a/js/src/frontend/Parser.cpp +++ b/js/src/frontend/Parser.cpp @@ -326,10 +326,14 @@ ParseContext::init() if (fun->isNamedLambda()) { if (!namedLambdaScope_->init(this)) return false; - AddDeclaredNamePtr p = namedLambdaScope_->lookupDeclaredNameForAdd(fun->name()); + AddDeclaredNamePtr p = + namedLambdaScope_->lookupDeclaredNameForAdd(fun->explicitName()); MOZ_ASSERT(!p); - if (!namedLambdaScope_->addDeclaredName(this, p, fun->name(), DeclarationKind::Const)) + if (!namedLambdaScope_->addDeclaredName(this, p, fun->explicitName(), + DeclarationKind::Const)) + { return false; + } } if (!functionScope_->init(this)) @@ -367,7 +371,7 @@ ParseContext::removeInnerFunctionBoxesForAnnexB(JSAtom* name) { for (uint32_t i = 0; i < innerFunctionBoxesForAnnexB_->length(); i++) { if (FunctionBox* funbox = innerFunctionBoxesForAnnexB_[i]) { - if (funbox->function()->name() == name) + if (funbox->function()->explicitName() == name) innerFunctionBoxesForAnnexB_[i] = nullptr; } } @@ -3477,8 +3481,8 @@ Parser::functionFormalParametersAndBody(InHandling inHandling, if (!body) return false; - if ((kind != Method && !IsConstructorKind(kind)) && fun->name()) { - RootedPropertyName propertyName(context, fun->name()->asPropertyName()); + if ((kind != Method && !IsConstructorKind(kind)) && fun->explicitName()) { + RootedPropertyName propertyName(context, fun->explicitName()->asPropertyName()); if (!checkStrictBinding(propertyName, handler.getPosition(pn))) return false; } @@ -4337,6 +4341,8 @@ Parser::declarationPattern(Node decl, DeclarationKind declKind, To if (!init) return null(); + handler.checkAndSetIsDirectRHSAnonFunction(init); + if (forHeadKind) { // For for(;;) declarations, consistency with |for (;| parsing requires // that the ';' first be examined as Operand, even though absence of a @@ -4366,6 +4372,8 @@ Parser::initializerInNameDeclaration(Node decl, Node binding, if (!initializer) return false; + handler.checkAndSetIsDirectRHSAnonFunction(initializer); + if (forHeadKind) { if (initialDeclaration) { bool isForIn, isForOf; @@ -5063,7 +5071,7 @@ Parser::exportDeclaration() if (!kid) return null(); - if (!checkExportedName(kid->pn_funbox->function()->name())) + if (!checkExportedName(kid->pn_funbox->function()->explicitName())) return null(); break; @@ -6670,8 +6678,6 @@ Parser::classDefinition(YieldHandling yieldHandling, return null(); } - // FIXME: Implement ES6 function "name" property semantics - // (bug 883377). RootedAtom funName(context); switch (propType) { case PropertyType::GetterNoExpressionClosure: @@ -6694,6 +6700,8 @@ Parser::classDefinition(YieldHandling yieldHandling, if (!fn) return null(); + handler.checkAndSetIsDirectRHSAnonFunction(fn); + JSOp op = JSOpFromPropertyType(propType); if (!handler.addClassMethodDefinition(classMethods, propName, fn, op, isStatic)) return null(); @@ -7753,6 +7761,9 @@ Parser::assignExpr(InHandling inHandling, YieldHandling yieldHandl return null(); } + if (kind == PNK_ASSIGN) + handler.checkAndSetIsDirectRHSAnonFunction(rhs); + return handler.newAssignment(kind, lhs, rhs, op); } @@ -9155,6 +9166,8 @@ Parser::objectLiteral(YieldHandling yieldHandling, PossibleError* if (!propExpr) return null(); + handler.checkAndSetIsDirectRHSAnonFunction(propExpr); + if (foldConstants && !FoldConstants(context, &propExpr, this)) return null(); @@ -9268,6 +9281,8 @@ Parser::objectLiteral(YieldHandling yieldHandling, PossibleError* return null(); } + handler.checkAndSetIsDirectRHSAnonFunction(rhs); + Node propExpr = handler.newAssignment(PNK_ASSIGN, lhs, rhs, JSOP_NOP); if (!propExpr) return null(); @@ -9278,8 +9293,6 @@ Parser::objectLiteral(YieldHandling yieldHandling, PossibleError* if (!abortIfSyntaxParser()) return null(); } else { - // FIXME: Implement ES6 function "name" property semantics - // (bug 883377). RootedAtom funName(context); if (!tokenStream.isCurrentTokenType(TOK_RB)) { funName = propAtom; @@ -9295,6 +9308,8 @@ Parser::objectLiteral(YieldHandling yieldHandling, PossibleError* if (!fn) return null(); + handler.checkAndSetIsDirectRHSAnonFunction(fn); + JSOp op = JSOpFromPropertyType(propType); if (!handler.addObjectMethodDefinition(literal, propName, fn, op)) return null(); diff --git a/js/src/frontend/SyntaxParseHandler.h b/js/src/frontend/SyntaxParseHandler.h index 75c7e3333..b7f00605b 100644 --- a/js/src/frontend/SyntaxParseHandler.h +++ b/js/src/frontend/SyntaxParseHandler.h @@ -339,6 +339,9 @@ class SyntaxParseHandler Node catchGuard, Node catchBody) { return true; } MOZ_MUST_USE bool setLastFunctionFormalParameterDefault(Node funcpn, Node pn) { return true; } + + void checkAndSetIsDirectRHSAnonFunction(Node pn) {} + Node newFunctionDefinition() { return NodeFunctionDefinition; } bool setComprehensionLambdaBody(Node pn, Node body) { return true; } void setFunctionFormalParametersAndBody(Node pn, Node kid) {} diff --git a/js/src/jsapi.cpp b/js/src/jsapi.cpp index bbf467808..85a38bba4 100644 --- a/js/src/jsapi.cpp +++ b/js/src/jsapi.cpp @@ -2095,7 +2095,7 @@ DefinePropertyById(JSContext* cx, HandleObject obj, HandleId id, HandleValue val getter != JS_PropertyStub && setter != JS_StrictPropertyStub) { if (getter && !(attrs & JSPROP_GETTER)) { - RootedAtom atom(cx, IdToFunctionName(cx, id, "get")); + RootedAtom atom(cx, IdToFunctionName(cx, id, FunctionPrefixKind::Get)); if (!atom) return false; JSFunction* getobj = NewNativeFunction(cx, (Native) getter, 0, atom); @@ -2111,7 +2111,7 @@ DefinePropertyById(JSContext* cx, HandleObject obj, HandleId id, HandleValue val if (setter && !(attrs & JSPROP_SETTER)) { // Root just the getter, since the setter is not yet a JSObject. AutoRooterGetterSetter getRoot(cx, JSPROP_GETTER, &getter, nullptr); - RootedAtom atom(cx, IdToFunctionName(cx, id, "set")); + RootedAtom atom(cx, IdToFunctionName(cx, id, FunctionPrefixKind::Set)); if (!atom) return false; JSFunction* setobj = NewNativeFunction(cx, (Native) setter, 1, atom); @@ -3615,7 +3615,7 @@ JS_GetFunctionObject(JSFunction* fun) JS_PUBLIC_API(JSString*) JS_GetFunctionId(JSFunction* fun) { - return fun->name(); + return fun->explicitName(); } JS_PUBLIC_API(JSString*) diff --git a/js/src/jscntxt.cpp b/js/src/jscntxt.cpp index 3ffd9ad7b..31d62332d 100644 --- a/js/src/jscntxt.cpp +++ b/js/src/jscntxt.cpp @@ -803,7 +803,7 @@ js::ReportMissingArg(JSContext* cx, HandleValue v, unsigned arg) SprintfLiteral(argbuf, "%u", arg); if (IsFunctionObject(v)) { - RootedAtom name(cx, v.toObject().as().name()); + RootedAtom name(cx, v.toObject().as().explicitName()); bytes = DecompileValueGenerator(cx, JSDVG_SEARCH_STACK, v, name); if (!bytes) return; diff --git a/js/src/jsfun.cpp b/js/src/jsfun.cpp index 1d44f0ea0..bcb0da80b 100644 --- a/js/src/jsfun.cpp +++ b/js/src/jsfun.cpp @@ -562,7 +562,7 @@ js::XDRInterpretedFunction(XDRState* xdr, HandleScope enclosingScope, return false; } - if (fun->name() || fun->hasGuessedAtom()) + if (fun->explicitName() || fun->hasCompileTimeName() || fun->hasGuessedAtom()) firstword |= HasAtom; if (fun->isStarGenerator()) @@ -1042,8 +1042,8 @@ js::FunctionToString(JSContext* cx, HandleFunction fun, bool prettyPrint) if (!ok) return nullptr; } - if (fun->name()) { - if (!out.append(fun->name())) + if (fun->explicitName()) { + if (!out.append(fun->explicitName())) return nullptr; } @@ -1364,14 +1364,14 @@ JSFunction::getUnresolvedName(JSContext* cx) if (isClassConstructor()) { // It's impossible to have an empty named class expression. We use // empty as a sentinel when creating default class constructors. - MOZ_ASSERT(name() != cx->names().empty); + MOZ_ASSERT(explicitOrCompileTimeName() != cx->names().empty); // Unnamed class expressions should not get a .name property at all. - return name(); + return explicitOrCompileTimeName(); } - // Returns the empty string for unnamed functions (FIXME: bug 883377). - return name() != nullptr ? name() : cx->names().empty; + return explicitOrCompileTimeName() != nullptr ? explicitOrCompileTimeName() + : cx->names().empty; } static const js::Value& @@ -2137,34 +2137,109 @@ js::CloneFunctionAndScript(JSContext* cx, HandleFunction fun, HandleObject enclo * Implements steps 3-5 of 9.2.11 SetFunctionName in ES2016. */ JSAtom* -js::IdToFunctionName(JSContext* cx, HandleId id, const char* prefix /* = nullptr */) +js::IdToFunctionName(JSContext* cx, HandleId id, + FunctionPrefixKind prefixKind /* = FunctionPrefixKind::None */) { - if (JSID_IS_ATOM(id) && !prefix) + // No prefix fastpath. + if (JSID_IS_ATOM(id) && prefixKind == FunctionPrefixKind::None) return JSID_TO_ATOM(id); - // Step 3. - MOZ_ASSERT_IF(prefix, !JSID_IS_SYMBOL(id)); + // Step 3 (implicit). // Step 4. if (JSID_IS_SYMBOL(id)) { + // Step 4.a. RootedAtom desc(cx, JSID_TO_SYMBOL(id)->description()); + + // Step 4.b, no prefix fastpath. + if (!desc && prefixKind == FunctionPrefixKind::None) + return cx->names().empty; + + // Step 5 (reordered). StringBuffer sb(cx); - if (!sb.append('[') || !sb.append(desc) || !sb.append(']')) - return nullptr; + if (prefixKind == FunctionPrefixKind::Get) { + if (!sb.append("get ")) + return nullptr; + } else if (prefixKind == FunctionPrefixKind::Set) { + if (!sb.append("set ")) + return nullptr; + } + + // Step 4.b. + if (desc) { + // Step 4.c. + if (!sb.append('[') || !sb.append(desc) || !sb.append(']')) + return nullptr; + } return sb.finishAtom(); } - // Step 5. RootedValue idv(cx, IdToValue(id)); - if (!prefix) - return ToAtom(cx, idv); + RootedAtom name(cx, ToAtom(cx, idv)); + if (!name) + return nullptr; + + // Step 5. + return NameToFunctionName(cx, name, prefixKind); +} + +JSAtom* +js::NameToFunctionName(ExclusiveContext* cx, HandleAtom name, + FunctionPrefixKind prefixKind /* = FunctionPrefixKind::None */) +{ + if (prefixKind == FunctionPrefixKind::None) + return name; StringBuffer sb(cx); - if (!sb.append(prefix, strlen(prefix)) || !sb.append(' ') || !sb.append(ToAtom(cx, idv))) + if (prefixKind == FunctionPrefixKind::Get) { + if (!sb.append("get ")) + return nullptr; + } else { + if (!sb.append("set ")) + return nullptr; + } + if (!sb.append(name)) return nullptr; return sb.finishAtom(); } +bool +js::SetFunctionNameIfNoOwnName(JSContext* cx, HandleFunction fun, HandleValue name, + FunctionPrefixKind prefixKind) +{ + MOZ_ASSERT(name.isString() || name.isSymbol() || name.isNumber()); + + if (fun->isClassConstructor()) { + // A class may have static 'name' method or accessor. + RootedId nameId(cx, NameToId(cx->names().name)); + bool result; + if (!HasOwnProperty(cx, fun, nameId, &result)) + return false; + + if (result) + return true; + } else { + // Anonymous function shouldn't have own 'name' property at this point. + MOZ_ASSERT(!fun->containsPure(cx->names().name)); + } + + RootedId id(cx); + if (!ValueToId(cx, name, &id)) + return false; + + RootedAtom funNameAtom(cx, IdToFunctionName(cx, id, prefixKind)); + if (!funNameAtom) + return false; + + RootedValue funNameVal(cx, StringValue(funNameAtom)); + if (!NativeDefineProperty(cx, fun, cx->names().name, funNameVal, nullptr, nullptr, + JSPROP_READONLY)) + { + return false; + } + return true; +} + JSFunction* js::DefineFunction(JSContext* cx, HandleObject obj, HandleId id, Native native, unsigned nargs, unsigned flags, AllocKind allocKind /* = AllocKind::FUNCTION */) diff --git a/js/src/jsfun.h b/js/src/jsfun.h index 65da5e06f..d45d112a5 100644 --- a/js/src/jsfun.h +++ b/js/src/jsfun.h @@ -31,6 +31,12 @@ static const uint32_t JSSLOT_BOUND_FUNCTION_ARGS = 4; static const char FunctionConstructorMedialSigils[] = ") {\n"; static const char FunctionConstructorFinalBrace[] = "\n}"; +enum class FunctionPrefixKind { + None, + Get, + Set +}; + class JSFunction : public js::NativeObject { public: @@ -61,6 +67,9 @@ class JSFunction : public js::NativeObject function-statement) */ SELF_HOSTED = 0x0080, /* function is self-hosted builtin and must not be decompilable nor constructible. */ + HAS_COMPILE_TIME_NAME = 0x0100, /* function had no explicit name, but a + name was set by SetFunctionName + at compile time */ INTERPRETED_LAZY = 0x0200, /* function is interpreted but doesn't have a script yet */ RESOLVED_LENGTH = 0x0400, /* f.length has been resolved (see fun_resolve). */ RESOLVED_NAME = 0x0800, /* f.name has been resolved (see fun_resolve). */ @@ -94,7 +103,7 @@ class JSFunction : public js::NativeObject NO_XDR_FLAGS = RESOLVED_LENGTH | RESOLVED_NAME, STABLE_ACROSS_CLONES = CONSTRUCTOR | EXPR_BODY | HAS_GUESSED_ATOM | LAMBDA | - SELF_HOSTED | FUNCTION_KIND_MASK + SELF_HOSTED | HAS_COMPILE_TIME_NAME | FUNCTION_KIND_MASK }; static_assert((INTERPRETED | INTERPRETED_LAZY) == js::JS_FUNCTION_INTERPRETED_BITS, @@ -179,6 +188,7 @@ class JSFunction : public js::NativeObject /* Possible attributes of an interpreted function: */ bool isExprBody() const { return flags() & EXPR_BODY; } + bool hasCompileTimeName() const { return flags() & HAS_COMPILE_TIME_NAME; } bool hasGuessedAtom() const { return flags() & HAS_GUESSED_ATOM; } bool isLambda() const { return flags() & LAMBDA; } bool isBoundFunction() const { return flags() & BOUND_FUN; } @@ -220,7 +230,7 @@ class JSFunction : public js::NativeObject } bool isNamedLambda() const { - return isLambda() && displayAtom() && !hasGuessedAtom(); + return isLambda() && displayAtom() && !hasCompileTimeName() && !hasGuessedAtom(); } bool hasLexicalThis() const { @@ -308,14 +318,12 @@ class JSFunction : public js::NativeObject JSAtom* getUnresolvedName(JSContext* cx); - JSAtom* name() const { return hasGuessedAtom() ? nullptr : atom_.get(); } - - // Because display names (see Debugger.Object.displayName) are already stored - // on functions and will always contain a valid es6 function name, as described - // in "ECMA-262 (2016-02-27) 9.2.11 SetFunctionName," we have opted to save - // memory by parsing the existing display name when a function's name property - // is accessed. - JSAtom* functionName(JSContext* cx) const; + JSAtom* explicitName() const { + return (hasCompileTimeName() || hasGuessedAtom()) ? nullptr : atom_.get(); + } + JSAtom* explicitOrCompileTimeName() const { + return hasGuessedAtom() ? nullptr : atom_.get(); + } void initAtom(JSAtom* atom) { atom_.init(atom); } @@ -325,9 +333,24 @@ class JSFunction : public js::NativeObject return atom_; } + void setCompileTimeName(JSAtom* atom) { + MOZ_ASSERT(!atom_); + MOZ_ASSERT(atom); + MOZ_ASSERT(!hasGuessedAtom()); + MOZ_ASSERT(!isClassConstructor()); + atom_ = atom; + flags_ |= HAS_COMPILE_TIME_NAME; + } + JSAtom* compileTimeName() const { + MOZ_ASSERT(hasCompileTimeName()); + MOZ_ASSERT(atom_); + return atom_; + } + void setGuessedAtom(JSAtom* atom) { MOZ_ASSERT(!atom_); MOZ_ASSERT(atom); + MOZ_ASSERT(!hasCompileTimeName()); MOZ_ASSERT(!hasGuessedAtom()); atom_ = atom; flags_ |= HAS_GUESSED_ATOM; @@ -672,7 +695,16 @@ NewFunctionWithProto(ExclusiveContext* cx, JSNative native, unsigned nargs, NewFunctionProtoHandling protoHandling = NewFunctionClassProto); extern JSAtom* -IdToFunctionName(JSContext* cx, HandleId id, const char* prefix = nullptr); +IdToFunctionName(JSContext* cx, HandleId id, + FunctionPrefixKind prefixKind = FunctionPrefixKind::None); + +extern JSAtom* +NameToFunctionName(ExclusiveContext* cx, HandleAtom name, + FunctionPrefixKind prefixKind = FunctionPrefixKind::None); + +extern bool +SetFunctionNameIfNoOwnName(JSContext* cx, HandleFunction fun, HandleValue name, + FunctionPrefixKind prefixKind); extern JSFunction* DefineFunction(JSContext* cx, HandleObject obj, HandleId id, JSNative native, diff --git a/js/src/jsfuninlines.h b/js/src/jsfuninlines.h index 8286a7d6a..e134def61 100644 --- a/js/src/jsfuninlines.h +++ b/js/src/jsfuninlines.h @@ -16,7 +16,7 @@ namespace js { inline const char* GetFunctionNameBytes(JSContext* cx, JSFunction* fun, JSAutoByteString* bytes) { - if (JSAtom* name = fun->name()) + if (JSAtom* name = fun->explicitName()) return bytes->encodeLatin1(cx, name); return js_anonymous_str; } diff --git a/js/src/tests/ecma_6/Function/function-name-assignment.js b/js/src/tests/ecma_6/Function/function-name-assignment.js new file mode 100644 index 000000000..5e4d1c004 --- /dev/null +++ b/js/src/tests/ecma_6/Function/function-name-assignment.js @@ -0,0 +1,139 @@ +var BUGNUMBER = 883377; +var summary = "Anonymous function name should be set based on assignment"; + +print(BUGNUMBER + ": " + summary); + +var fooSymbol = Symbol("foo"); +var emptySymbol = Symbol(""); +var undefSymbol = Symbol(); +var globalVar; + +var exprs = [ + ["function() {}", false], + ["function named() {}", true], + ["function*() {}", false], + ["function* named() {}", true], + ["async function() {}", false], + ["async function named() {}", true], + ["() => {}", false], + ["async () => {}", false], + ["class {}", false], + ["class named {}", true], +]; + +function testAssignmentExpression(expr, named) { + eval(` + var assignment; + assignment = ${expr}; + assertEq(assignment.name, named ? "named" : "assignment"); + + globalVar = ${expr}; + assertEq(globalVar.name, named ? "named" : "globalVar"); + + var obj = { dynamic: null }; + with (obj) { + dynamic = ${expr}; + } + assertEq(obj.dynamic.name, named ? "named" : "dynamic"); + + (function namedLambda(param1, param2) { + var assignedToNamedLambda; + assignedToNamedLambda = namedLambda = ${expr}; + assertEq(namedLambda.name, "namedLambda"); + assertEq(assignedToNamedLambda.name, named ? "named" : "namedLambda"); + + param1 = ${expr}; + assertEq(param1.name, named ? "named" : "param1"); + + { + let param1 = ${expr}; + assertEq(param1.name, named ? "named" : "param1"); + + param2 = ${expr}; + assertEq(param2.name, named ? "named" : "param2"); + } + })(); + + { + let nextedLexical1, nextedLexical2; + { + let nextedLexical1 = ${expr}; + assertEq(nextedLexical1.name, named ? "named" : "nextedLexical1"); + + nextedLexical2 = ${expr}; + assertEq(nextedLexical2.name, named ? "named" : "nextedLexical2"); + } + } + `); + + // Not applicable cases: not IsIdentifierRef. + eval(` + var inParen; + (inParen) = ${expr}; + assertEq(inParen.name, named ? "named" : ""); + `); + + // Not applicable cases: not direct RHS. + if (!expr.includes("=>")) { + eval(` + var a = true && ${expr}; + assertEq(a.name, named ? "named" : ""); + `); + } else { + // Arrow function cannot be RHS of &&. + eval(` + var a = true && (${expr}); + assertEq(a.name, named ? "named" : ""); + `); + } + + // Not applicable cases: property. + eval(` + var obj = {}; + + obj.prop = ${expr}; + assertEq(obj.prop.name, named ? "named" : ""); + + obj["literal"] = ${expr}; + assertEq(obj["literal"].name, named ? "named" : ""); + `); + + // Not applicable cases: assigned again. + eval(` + var tmp = [${expr}]; + assertEq(tmp[0].name, named ? "named" : ""); + + var assignment; + assignment = tmp[0]; + assertEq(assignment.name, named ? "named" : ""); + `); +} +for (var [expr, named] of exprs) { + testAssignmentExpression(expr, named); +} + +function testVariableDeclaration(expr, named) { + eval(` + var varDecl = ${expr}; + assertEq(varDecl.name, named ? "named" : "varDecl"); + `); +} +for (var [expr, named] of exprs) { + testVariableDeclaration(expr, named); +} + +function testLexicalBinding(expr, named) { + eval(` + let lexical = ${expr}; + assertEq(lexical.name, named ? "named" : "lexical"); + + const constLexical = ${expr}; + assertEq(constLexical.name, named ? "named" : "constLexical"); + `); +} +for (var [expr, named] of exprs) { + testLexicalBinding(expr, named); +} + +if (typeof reportCompare === "function") + reportCompare(0, 0); diff --git a/js/src/tests/ecma_6/Function/function-name-binding.js b/js/src/tests/ecma_6/Function/function-name-binding.js new file mode 100644 index 000000000..bdd6c131c --- /dev/null +++ b/js/src/tests/ecma_6/Function/function-name-binding.js @@ -0,0 +1,54 @@ +var BUGNUMBER = 883377; +var summary = "Anonymous function name should be set based on binding pattern"; + +print(BUGNUMBER + ": " + summary); + +var exprs = [ + ["function() {}", false], + ["function named() {}", true], + ["function*() {}", false], + ["function* named() {}", true], + ["async function() {}", false], + ["async function named() {}", true], + ["() => {}", false], + ["async () => {}", false], + ["class {}", false], + ["class named {}", true], +]; + +function testAssignmentProperty(expr, named) { + var f = eval(`(function({ prop1 = ${expr} }) { return prop1; })`); + assertEq(f({}).name, named ? "named" : "prop1"); + + eval(` + var { prop1 = ${expr} } = {}; + assertEq(prop1.name, named ? "named" : "prop1"); + `); +} +for (var [expr, named] of exprs) { + testAssignmentProperty(expr, named); +} + +function testAssignmentElement(expr, named) { + var f = eval(`(function([elem1 = ${expr}]) { return elem1; })`); + assertEq(f([]).name, named ? "named" : "elem1"); + + eval(` + var [elem1 = ${expr}] = []; + assertEq(elem1.name, named ? "named" : "elem1"); + `); +} +for (var [expr, named] of exprs) { + testAssignmentElement(expr, named); +} + +function testSingleNameBinding(expr, named) { + var f = eval(`(function(param1 = ${expr}) { return param1; })`); + assertEq(f().name, named ? "named" : "param1"); +} +for (var [expr, named] of exprs) { + testSingleNameBinding(expr, named); +} + +if (typeof reportCompare === "function") + reportCompare(0, 0); diff --git a/js/src/tests/ecma_6/Function/function-name-class.js b/js/src/tests/ecma_6/Function/function-name-class.js new file mode 100644 index 000000000..edde69055 --- /dev/null +++ b/js/src/tests/ecma_6/Function/function-name-class.js @@ -0,0 +1,32 @@ +var BUGNUMBER = 883377; +var summary = "Anonymous class with name method shouldn't be affected by assignment"; + +print(BUGNUMBER + ": " + summary); + +var classWithStaticNameMethod = class { static name() {} }; +assertEq(typeof classWithStaticNameMethod.name, "function"); + +var classWithStaticNameGetter = class { static get name() { return "static name"; } }; +assertEq(typeof Object.getOwnPropertyDescriptor(classWithStaticNameGetter, "name").get, "function"); +assertEq(classWithStaticNameGetter.name, "static name"); + +var classWithStaticNameSetter = class { static set name(v) {} }; +assertEq(typeof Object.getOwnPropertyDescriptor(classWithStaticNameSetter, "name").set, "function"); + +var n = "NAME".toLowerCase(); +var classWithStaticNameMethodComputed = class { static [n]() {} }; +assertEq(typeof classWithStaticNameMethodComputed.name, "function"); + +// It doesn't apply for non-static method. + +var classWithNameMethod = class { name() {} }; +assertEq(classWithNameMethod.name, "classWithNameMethod"); + +var classWithNameGetter = class { get name() { return "name"; } }; +assertEq(classWithNameGetter.name, "classWithNameGetter"); + +var classWithNameSetter = class { set name(v) {} }; +assertEq(classWithNameSetter.name, "classWithNameSetter"); + +if (typeof reportCompare === "function") + reportCompare(0, 0); diff --git a/js/src/tests/ecma_6/Function/function-name-for.js b/js/src/tests/ecma_6/Function/function-name-for.js new file mode 100644 index 000000000..2f04a5fa8 --- /dev/null +++ b/js/src/tests/ecma_6/Function/function-name-for.js @@ -0,0 +1,31 @@ +var BUGNUMBER = 883377; +var summary = "Anonymous function name should be set based on for-in initializer"; + +print(BUGNUMBER + ": " + summary); + +var exprs = [ + ["function() {}", false], + ["function named() {}", true], + ["function*() {}", false], + ["function* named() {}", true], + ["async function() {}", false], + ["async function named() {}", true], + ["() => {}", false], + ["async () => {}", false], + ["class {}", false], + ["class named {}", true], +]; + +function testForInHead(expr, named) { + eval(` + for (var forInHead = ${expr} in {}) { + } + `); + assertEq(forInHead.name, named ? "named" : "forInHead"); +} +for (var [expr, named] of exprs) { + testForInHead(expr, named); +} + +if (typeof reportCompare === "function") + reportCompare(0, 0); diff --git a/js/src/tests/ecma_6/Function/function-name-method.js b/js/src/tests/ecma_6/Function/function-name-method.js new file mode 100644 index 000000000..3b2eeee79 --- /dev/null +++ b/js/src/tests/ecma_6/Function/function-name-method.js @@ -0,0 +1,70 @@ +var BUGNUMBER = 883377; +var summary = "Anonymous function name should be set based on method definition"; + +print(BUGNUMBER + ": " + summary); + +var fooSymbol = Symbol("foo"); +var emptySymbol = Symbol(""); +var undefSymbol = Symbol(); + +function testMethod(prefix, classPrefix="", prototype=false) { + var param = (prefix == "set" || prefix == "static set") ? "v" : ""; + var sep = classPrefix ? "" : ","; + var objOrClass = eval(`(${classPrefix}{ + ${prefix} prop(${param}) {} ${sep} + ${prefix} "literal"(${param}) {} ${sep} + ${prefix} ""(${param}) {} ${sep} + ${prefix} 5(${param}) {} ${sep} + ${prefix} [Symbol.iterator](${param}) {} ${sep} + ${prefix} [fooSymbol](${param}) {} ${sep} + ${prefix} [emptySymbol](${param}) {} ${sep} + ${prefix} [undefSymbol](${param}) {} ${sep} + ${prefix} [/a/](${param}) {} ${sep} + })`); + + var target = prototype ? objOrClass.prototype : objOrClass; + + function testOne(methodName, expectedName) { + var f; + if (prefix == "get" || prefix == "static get") { + f = Object.getOwnPropertyDescriptor(target, methodName).get; + expectedName = "get " + expectedName; + } else if (prefix == "set" || prefix == "static set") { + f = Object.getOwnPropertyDescriptor(target, methodName).set; + expectedName = "set " + expectedName; + } else { + f = Object.getOwnPropertyDescriptor(target, methodName).value; + } + + assertEq(f.name, expectedName); + } + testOne("prop", "prop"); + testOne("literal", "literal"); + testOne("", ""); + testOne(5, "5"); + testOne(Symbol.iterator, "[Symbol.iterator]"); + testOne(fooSymbol, "[foo]"); + testOne(emptySymbol, "[]"); + testOne(undefSymbol, ""); + testOne(/a/, "/a/"); +} +testMethod(""); +testMethod("*"); +testMethod("async"); +testMethod("get"); +testMethod("set"); + +testMethod("", "class", true); +testMethod("*", "class", true); +testMethod("async", "class", true); +testMethod("get", "class", true); +testMethod("set", "class", true); + +testMethod("static", "class"); +testMethod("static *", "class"); +testMethod("static async", "class"); +testMethod("static get", "class"); +testMethod("static set", "class"); + +if (typeof reportCompare === "function") + reportCompare(0, 0); diff --git a/js/src/tests/ecma_6/Function/function-name-property.js b/js/src/tests/ecma_6/Function/function-name-property.js new file mode 100644 index 000000000..7ad174b10 --- /dev/null +++ b/js/src/tests/ecma_6/Function/function-name-property.js @@ -0,0 +1,58 @@ +var BUGNUMBER = 883377; +var summary = "Anonymous function name should be set based on property name"; + +print(BUGNUMBER + ": " + summary); + +var fooSymbol = Symbol("foo"); +var emptySymbol = Symbol(""); +var undefSymbol = Symbol(); + +var exprs = [ + ["function() {}", false], + ["function named() {}", true], + ["function*() {}", false], + ["function* named() {}", true], + ["async function() {}", false], + ["async function named() {}", true], + ["() => {}", false], + ["async () => {}", false], + ["class {}", false], + ["class named {}", true], +]; + +function testPropertyDefinition(expr, named) { + var obj = eval(`({ + prop: ${expr}, + "literal": ${expr}, + "": ${expr}, + 5: ${expr}, + 0.4: ${expr}, + [Symbol.iterator]: ${expr}, + [fooSymbol]: ${expr}, + [emptySymbol]: ${expr}, + [undefSymbol]: ${expr}, + [/a/]: ${expr}, + })`); + assertEq(obj.prop.name, named ? "named" : "prop"); + assertEq(obj["literal"].name, named ? "named" : "literal"); + assertEq(obj[""].name, named ? "named" : ""); + assertEq(obj[5].name, named ? "named" : "5"); + assertEq(obj[0.4].name, named ? "named" : "0.4"); + assertEq(obj[Symbol.iterator].name, named ? "named" : "[Symbol.iterator]"); + assertEq(obj[fooSymbol].name, named ? "named" : "[foo]"); + assertEq(obj[emptySymbol].name, named ? "named" : "[]"); + assertEq(obj[undefSymbol].name, named ? "named" : ""); + assertEq(obj[/a/].name, named ? "named" : "/a/"); + + // Not applicable cases: __proto__. + obj = { + __proto__: function() {} + }; + assertEq(obj.__proto__.name, ""); +} +for (var [expr, named] of exprs) { + testPropertyDefinition(expr, named); +} + +if (typeof reportCompare === "function") + reportCompare(0, 0); diff --git a/js/src/vm/AsyncFunction.cpp b/js/src/vm/AsyncFunction.cpp index 1e0c7d7c2..f50c87114 100644 --- a/js/src/vm/AsyncFunction.cpp +++ b/js/src/vm/AsyncFunction.cpp @@ -116,7 +116,7 @@ js::WrapAsyncFunctionWithProto(JSContext* cx, HandleFunction unwrapped, HandleOb // Create a new function with AsyncFunctionPrototype, reusing the name and // the length of `unwrapped`. - RootedAtom funName(cx, unwrapped->name()); + RootedAtom funName(cx, unwrapped->explicitName()); uint16_t length; if (!unwrapped->getLength(cx, &length)) return nullptr; @@ -130,6 +130,9 @@ js::WrapAsyncFunctionWithProto(JSContext* cx, HandleFunction unwrapped, HandleOb if (!wrapped) return nullptr; + if (unwrapped->hasCompileTimeName()) + wrapped->setCompileTimeName(unwrapped->compileTimeName()); + // Link them to each other to make GetWrappedAsyncFunction and // GetUnwrappedAsyncFunction work. unwrapped->setExtendedSlot(UNWRAPPED_ASYNC_WRAPPED_SLOT, ObjectValue(*wrapped)); diff --git a/js/src/vm/Debugger.cpp b/js/src/vm/Debugger.cpp index 4d181545f..d16781326 100644 --- a/js/src/vm/Debugger.cpp +++ b/js/src/vm/Debugger.cpp @@ -9509,7 +9509,7 @@ DebuggerObject::name() const { MOZ_ASSERT(isFunction()); - return referent()->as().name(); + return referent()->as().explicitName(); } JSAtom* diff --git a/js/src/vm/GlobalObject.cpp b/js/src/vm/GlobalObject.cpp index 039be2e32..280548cd6 100644 --- a/js/src/vm/GlobalObject.cpp +++ b/js/src/vm/GlobalObject.cpp @@ -802,10 +802,10 @@ GlobalObject::getSelfHostedFunction(JSContext* cx, Handle global, return false; if (exists) { RootedFunction fun(cx, &funVal.toObject().as()); - if (fun->name() == name) + if (fun->explicitName() == name) return true; - if (fun->name() == selfHostedName) { + if (fun->explicitName() == selfHostedName) { // This function was initially cloned because it was called by // other self-hosted code, so the clone kept its self-hosted name, // instead of getting the name it's intended to have in content diff --git a/js/src/vm/Interpreter.cpp b/js/src/vm/Interpreter.cpp index 51e809345..9cba1f4dc 100644 --- a/js/src/vm/Interpreter.cpp +++ b/js/src/vm/Interpreter.cpp @@ -1860,7 +1860,6 @@ CASE(EnableInterruptsPseudoOpcode) /* Various 1-byte no-ops. */ CASE(JSOP_NOP) CASE(JSOP_NOP_DESTRUCTURING) -CASE(JSOP_UNUSED182) CASE(JSOP_UNUSED183) CASE(JSOP_UNUSED187) CASE(JSOP_UNUSED192) @@ -3482,6 +3481,19 @@ CASE(JSOP_TOASYNC) } END_CASE(JSOP_TOASYNC) +CASE(JSOP_SETFUNNAME) +{ + MOZ_ASSERT(REGS.stackDepth() >= 2); + FunctionPrefixKind prefixKind = FunctionPrefixKind(GET_UINT8(REGS.pc)); + ReservedRooted name(&rootValue0, REGS.sp[-1]); + ReservedRooted fun(&rootFunction0, ®S.sp[-2].toObject().as()); + if (!SetFunctionNameIfNoOwnName(cx, fun, name, prefixKind)) + goto error; + + REGS.sp--; +} +END_CASE(JSOP_SETFUNNAME) + CASE(JSOP_CALLEE) MOZ_ASSERT(REGS.fp()->isFunctionFrame()); PUSH_COPY(REGS.fp()->calleev()); @@ -4343,7 +4355,7 @@ js::DefFunOperation(JSContext* cx, HandleScript script, HandleObject envChain, parent = parent->enclosingEnvironment(); /* ES5 10.5 (NB: with subsequent errata). */ - RootedPropertyName name(cx, fun->name()->asPropertyName()); + RootedPropertyName name(cx, fun->explicitName()->asPropertyName()); RootedShape shape(cx); RootedObject pobj(cx); @@ -4991,7 +5003,7 @@ js::ReportRuntimeLexicalError(JSContext* cx, unsigned errorNumber, RootedPropertyName name(cx); if (op == JSOP_THROWSETCALLEE) { - name = script->functionNonDelazifying()->name()->asPropertyName(); + name = script->functionNonDelazifying()->explicitName()->asPropertyName(); } else if (IsLocalOp(op)) { name = FrameSlotName(script, pc)->asPropertyName(); } else if (IsAtomOp(op)) { @@ -5059,8 +5071,8 @@ js::ThrowUninitializedThis(JSContext* cx, AbstractFramePtr frame) if (fun->isDerivedClassConstructor()) { const char* name = "anonymous"; JSAutoByteString str; - if (fun->name()) { - if (!AtomToPrintableString(cx, fun->name(), &str)) + if (fun->explicitName()) { + if (!AtomToPrintableString(cx, fun->explicitName(), &str)) return false; name = str.ptr(); } diff --git a/js/src/vm/Opcodes.h b/js/src/vm/Opcodes.h index 18ae6f073..f6636004d 100644 --- a/js/src/vm/Opcodes.h +++ b/js/src/vm/Opcodes.h @@ -1870,7 +1870,16 @@ * Stack: => */ \ macro(JSOP_POPVARENV, 181, "popvarenv", NULL, 1, 0, 0, JOF_BYTE) \ - macro(JSOP_UNUSED182, 182,"unused182", NULL, 1, 0, 0, JOF_BYTE) \ + /* + * Pops the top two values on the stack as 'name' and 'fun', defines the + * name of 'fun' to 'name' with prefix if any, and pushes 'fun' back onto + * the stack. + * Category: Statements + * Type: Function + * Operands: uint8_t prefixKind + * Stack: fun, name => fun + */ \ + macro(JSOP_SETFUNNAME, 182,"setfunname", NULL, 2, 2, 1, JOF_UINT8) \ macro(JSOP_UNUSED183, 183,"unused183", NULL, 1, 0, 0, JOF_BYTE) \ \ /* diff --git a/js/src/vm/SelfHosting.cpp b/js/src/vm/SelfHosting.cpp index fd604c6bf..bf49f2268 100644 --- a/js/src/vm/SelfHosting.cpp +++ b/js/src/vm/SelfHosting.cpp @@ -2878,7 +2878,7 @@ CloneObject(JSContext* cx, HandleNativeObject selfHostedObject) RootedObject clone(cx); if (selfHostedObject->is()) { RootedFunction selfHostedFunction(cx, &selfHostedObject->as()); - bool hasName = selfHostedFunction->name() != nullptr; + bool hasName = selfHostedFunction->explicitName() != nullptr; // Arrow functions use the first extended slot for their lexical |this| value. MOZ_ASSERT(!selfHostedFunction->isArrow()); @@ -2894,7 +2894,7 @@ CloneObject(JSContext* cx, HandleNativeObject selfHostedObject) // self-hosting compartment has to be stored on the clone. if (clone && hasName) { clone->as().setExtendedSlot(LAZY_FUNCTION_NAME_SLOT, - StringValue(selfHostedFunction->name())); + StringValue(selfHostedFunction->explicitName())); } } else if (selfHostedObject->is()) { RegExpObject& reobj = selfHostedObject->as(); @@ -2977,10 +2977,10 @@ JSRuntime::createLazySelfHostedFunctionClone(JSContext* cx, HandlePropertyName s return false; if (!selfHostedFun->isClassConstructor() && !selfHostedFun->hasGuessedAtom() && - selfHostedFun->name() != selfHostedName) + selfHostedFun->explicitName() != selfHostedName) { MOZ_ASSERT(selfHostedFun->getExtendedSlot(HAS_SELFHOSTED_CANONICAL_NAME_SLOT).toBoolean()); - funName = selfHostedFun->name(); + funName = selfHostedFun->explicitName(); } fun.set(NewScriptedFunction(cx, nargs, JSFunction::INTERPRETED_LAZY, diff --git a/js/src/vm/TypeInference.cpp b/js/src/vm/TypeInference.cpp index 2a7762e4f..3d09c7464 100644 --- a/js/src/vm/TypeInference.cpp +++ b/js/src/vm/TypeInference.cpp @@ -4541,7 +4541,7 @@ TypeScript::printTypes(JSContext* cx, HandleScript script) const uintptr_t(script.get()), script->filename(), script->lineno()); if (script->functionNonDelazifying()) { - if (JSAtom* name = script->functionNonDelazifying()->name()) + if (JSAtom* name = script->functionNonDelazifying()->explicitName()) name->dumpCharsNoNewline(); } diff --git a/js/src/vm/TypedArrayObject.cpp b/js/src/vm/TypedArrayObject.cpp index 9d4ee94c6..ae97be0de 100644 --- a/js/src/vm/TypedArrayObject.cpp +++ b/js/src/vm/TypedArrayObject.cpp @@ -2870,7 +2870,7 @@ bool DataViewObject::defineGetter(JSContext* cx, PropertyName* name, HandleNativeObject proto) { RootedId id(cx, NameToId(name)); - RootedAtom atom(cx, IdToFunctionName(cx, id, "get")); + RootedAtom atom(cx, IdToFunctionName(cx, id, FunctionPrefixKind::Get)); if (!atom) return false; unsigned attrs = JSPROP_SHARED | JSPROP_GETTER; diff --git a/js/src/wasm/AsmJS.cpp b/js/src/wasm/AsmJS.cpp index d2f331bf1..b4f41c3d5 100644 --- a/js/src/wasm/AsmJS.cpp +++ b/js/src/wasm/AsmJS.cpp @@ -679,7 +679,7 @@ FunctionObject(ParseNode* fn) static inline PropertyName* FunctionName(ParseNode* fn) { - if (JSAtom* name = FunctionObject(fn)->name()) + if (JSAtom* name = FunctionObject(fn)->explicitName()) return name->asPropertyName(); return nullptr; } @@ -8037,7 +8037,7 @@ TryInstantiate(JSContext* cx, CallArgs args, Module& module, const AsmJSMetadata static bool HandleInstantiationFailure(JSContext* cx, CallArgs args, const AsmJSMetadata& metadata) { - RootedAtom name(cx, args.callee().as().name()); + RootedAtom name(cx, args.callee().as().explicitName()); if (cx->isExceptionPending()) return false; @@ -8128,7 +8128,7 @@ InstantiateAsmJS(JSContext* cx, unsigned argc, JS::Value* vp) static JSFunction* NewAsmJSModuleFunction(ExclusiveContext* cx, JSFunction* origFun, HandleObject moduleObj) { - RootedAtom name(cx, origFun->name()); + RootedAtom name(cx, origFun->explicitName()); JSFunction::Flags flags = origFun->isLambda() ? JSFunction::ASMJS_LAMBDA_CTOR : JSFunction::ASMJS_CTOR; @@ -8846,7 +8846,7 @@ js::AsmJSModuleToString(JSContext* cx, HandleFunction fun, bool addParenToLambda if (!out.append("function ")) return nullptr; - if (fun->name() && !out.append(fun->name())) + if (fun->explicitName() && !out.append(fun->explicitName())) return nullptr; bool haveSource = source->hasSourceData(); @@ -8894,8 +8894,8 @@ js::AsmJSFunctionToString(JSContext* cx, HandleFunction fun) if (!haveSource) { // asm.js functions can't be anonymous - MOZ_ASSERT(fun->name()); - if (!out.append(fun->name())) + MOZ_ASSERT(fun->explicitName()); + if (!out.append(fun->explicitName())) return nullptr; if (!out.append("() {\n [sourceless code]\n}")) return nullptr; -- cgit v1.2.3