JDK-8006529.js revision 88:43e32b36153c
1132718Skan/* 2132718Skan * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. 3169689Skan * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4132718Skan * 5132718Skan * This code is free software; you can redistribute it and/or modify it 6132718Skan * under the terms of the GNU General Public License version 2 only, as 7132718Skan * published by the Free Software Foundation. 8132718Skan * 9132718Skan * This code is distributed in the hope that it will be useful, but WITHOUT 10132718Skan * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11132718Skan * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12132718Skan * version 2 for more details (a copy is included in the LICENSE file that 13132718Skan * accompanied this code). 14132718Skan * 15132718Skan * You should have received a copy of the GNU General Public License version 16132718Skan * 2 along with this work; if not, write to the Free Software Foundation, 17132718Skan * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18132718Skan * 19132718Skan * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20132718Skan * or visit www.oracle.com if you need additional information or have any 21132718Skan * questions. 22169689Skan */ 23169689Skan 24132718Skan/** 25132718Skan * JDK-8006529 : Methods should not always get callee parameter, and they 26132718Skan * should not be too eager in creation of scopes. 27132718Skan * 28132718Skan * @test 29132718Skan * @run 30132718Skan */ 31132718Skan 32132718Skan/* 33132718Skan * This test script depends on nashorn Compiler internals. It uses reflection 34132718Skan * to get access to private field and many public methods of Compiler and 35132718Skan * FunctionNode classes. Note that this is trusted code and access to such 36132718Skan * internal package classes and methods is okay. But, if you modify any 37132718Skan * Compiler or FunctionNode class, you may have to revisit this script. 38132718Skan * We cannot use direct Java class (via dynalink bean linker) to Compiler 39132718Skan * and FunctionNode because of package-access check and so reflective calls. 40132718Skan */ 41132718Skan 42132718Skanvar Parser = Java.type("jdk.nashorn.internal.parser.Parser") 43132718Skanvar Compiler = Java.type("jdk.nashorn.internal.codegen.Compiler") 44132718Skanvar Context = Java.type("jdk.nashorn.internal.runtime.Context") 45132718Skanvar Source = Java.type("jdk.nashorn.internal.runtime.Source") 46132718Skanvar FunctionNode = Java.type("jdk.nashorn.internal.ir.FunctionNode") 47132718Skan 48132718Skan// Compiler class methods and fields 49169689Skanvar parseMethod = Parser.class.getMethod("parse"); 50169689Skanvar compileMethod = Compiler.class.getMethod("compile"); 51132718Skan 52132718Skan// NOTE: private field. But this is a trusted test! 53169689Skan// Compiler.functionNode 54169689Skanvar functionNodeField = Compiler.class.getDeclaredField("functionNode"); 55132718SkanfunctionNodeField.setAccessible(true); 56132718Skan 57169689Skan// FunctionNode methods 58169689Skan 59132718Skan// FunctionNode.getFunctions method 60132718Skanvar getFunctionsMethod = FunctionNode.class.getMethod("getFunctions"); 61132718Skan 62132718Skan// These are method names of methods in FunctionNode class 63132718Skanvar allAssertionList = ['isVarArg', 'needsParentScope', 'needsCallee', 'needsScope', 'needsSelfSymbol', 'isSplit', 'hasEval', 'hasWith', 'hasDeepWithOrEval', 'varsInScope', 'isStrictMode'] 64132718Skan 65132718Skan// corresponding Method objects of FunctionNode class 66132718Skanvar functionNodeMethods = {}; 67132718Skan// initialize FunctionNode methods 68132718Skan(function() { 69132718Skan for (var f in allAssertionList) { 70132718Skan var method = allAssertionList[f]; 71132718Skan functionNodeMethods[method] = FunctionNode.class.getMethod(method); 72132718Skan } 73132718Skan})(); 74132718Skan 75132718Skan// returns "script" functionNode from Compiler instance 76132718Skanfunction getScriptNode(compiler) { 77132718Skan // compiler.functionNode 78132718Skan return functionNodeField.get(compiler); 79132718Skan} 80132718Skan 81132718Skan// returns functionNode.getFunctions().get(0) 82132718Skanfunction getFirstFunction(functionNode) { 83132718Skan // functionNode.getFunctions().get(0) 84132718Skan return getFunctionsMethod.invoke(functionNode).get(0); 85132718Skan} 86132718Skan 87132718Skan// compile(script) -- compiles a script specified as a string with its 88132718Skan// source code, returns a jdk.nashorn.internal.ir.FunctionNode object 89132718Skan// representing it. 90132718Skanfunction compile(source) { 91132718Skan var source = new Source("<no name>", source); 92132718Skan var parser = new Parser(Context.getContext(), source, null); 93132718Skan var func = parseMethod.invoke(parser); 94132718Skan var compiler = new Compiler(Context.getContext(), func); 95132718Skan 96 compileMethod.invoke(compiler); 97 98 return getScriptNode(compiler); 99}; 100 101var allAssertions = (function() { 102 var allAssertions = {} 103 for(var assertion in allAssertionList) { 104 allAssertions[allAssertionList[assertion]] = true 105 } 106 return allAssertions; 107})(); 108 109 110// test(f[, assertions...]) tests whether all the specified assertions on the 111// passed function node are true. 112function test(f) { 113 var assertions = {} 114 for(var i = 1; i < arguments.length; ++i) { 115 var assertion = arguments[i] 116 if(!allAssertions[assertion]) { 117 throw "Unknown assertion " + assertion + " for " + f; 118 } 119 assertions[assertion] = true 120 } 121 for(var assertion in allAssertions) { 122 var expectedValue = !!assertions[assertion] 123 if(functionNodeMethods[assertion].invoke(f) !== expectedValue) { 124 throw "Expected " + assertion + " === " + expectedValue + " for " + f; 125 } 126 } 127} 128 129// testFirstFn(script[, assertions...] tests whether all the specified 130// assertions are true in the first function in the given script; "script" 131// is a string with the source text of the script. 132function testFirstFn(script) { 133 arguments[0] = getFirstFunction(compile(script)) 134 test.apply(null, arguments) 135} 136 137// ---------------------------------- ACTUAL TESTS START HERE -------------- 138 139// The simplest possible functions have no attributes set 140testFirstFn("function f() { }") 141testFirstFn("function f(x) { x }") 142 143// A function referencing a global needs parent scope, and it needs callee 144// (because parent scope is passed through callee) 145testFirstFn("function f() { x }", 'needsCallee', 'needsParentScope') 146 147// A function referencing "arguments" will have to be vararg. It also needs 148// the callee, as it needs to fill out "arguments.callee". 149testFirstFn("function f() { arguments }", 'needsCallee', 'isVarArg') 150 151// A function referencing "arguments" will have to be vararg. If it is 152// strict, it will not have to have a callee, though. 153testFirstFn("function f() {'use strict'; arguments }", 'isVarArg', 'isStrictMode') 154 155// A function defining "arguments" as a parameter will not be vararg. 156testFirstFn("function f(arguments) { arguments }") 157 158// A function defining "arguments" as a nested function will not be vararg. 159testFirstFn("function f() { function arguments() {}; arguments; }") 160 161// A function defining "arguments" as a local variable will be vararg. 162testFirstFn("function f() { var arguments; arguments; }", 'isVarArg', 'needsCallee') 163 164// A self-referencing function defined as a statement doesn't need a self 165// symbol, as it'll rather obtain itself from the parent scope. 166testFirstFn("function f() { f() }", 'needsCallee', 'needsParentScope') 167 168// A self-referencing function defined as an expression needs a self symbol, 169// as it can't obtain itself from the parent scope. 170testFirstFn("(function f() { f() })", 'needsCallee', 'needsSelfSymbol') 171 172// A child function accessing parent's variable triggers the need for scope 173// in parent 174testFirstFn("(function f() { var x; function g() { x } })", 'needsScope') 175 176// A child function accessing parent's parameter triggers the need for scope 177// in parent 178testFirstFn("(function f(x) { function g() { x } })", 'needsScope') 179 180// A child function accessing a global variable triggers the need for parent 181// scope in parent 182testFirstFn("(function f() { function g() { x } })", 'needsParentScope', 'needsCallee') 183 184// A child function redefining a local variable from its parent should not 185// affect the parent function in any way 186testFirstFn("(function f() { var x; function g() { var x; x } })") 187 188// Using "with" unleashes a lot of needs: parent scope, callee, own scope, 189// and all variables in scope. Actually, we could make "with" less wasteful, 190// and only put those variables in scope that it actually references, similar 191// to what nested functions do with variables in their parents. 192testFirstFn("(function f() { var o; with(o) {} })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasWith', 'hasDeepWithOrEval', 'varsInScope') 193 194// Using "eval" is as bad as using "with" with the added requirement of 195// being vararg, 'cause we don't know if eval will be using "arguments". 196testFirstFn("(function f() { eval() })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasEval', 'isVarArg', 'hasDeepWithOrEval', 'varsInScope') 197 198// Nested function using "with" is pretty much the same as the parent 199// function needing with. 200testFirstFn("(function f() { function g() { var o; with(o) {} } })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasDeepWithOrEval', 'varsInScope') 201// Nested function using "eval" is almost the same as parent function using 202// eval, but at least the parent doesn't have to be vararg. 203testFirstFn("(function f() { function g() { eval() } })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasDeepWithOrEval', 'varsInScope') 204 205// Function with 250 named parameters is ordinary 206testFirstFn("function f(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15, p16, p17, p18, p19, p20, p21, p22, p23, p24, p25, p26, p27, p28, p29, p30, p31, p32, p33, p34, p35, p36, p37, p38, p39, p40, p41, p42, p43, p44, p45, p46, p47, p48, p49, p50, p51, p52, p53, p54, p55, p56, p57, p58, p59, p60, p61, p62, p63, p64, p65, p66, p67, p68, p69, p70, p71, p72, p73, p74, p75, p76, p77, p78, p79, p80, p81, p82, p83, p84, p85, p86, p87, p88, p89, p90, p91, p92, p93, p94, p95, p96, p97, p98, p99, p100, p101, p102, p103, p104, p105, p106, p107, p108, p109, p110, p111, p112, p113, p114, p115, p116, p117, p118, p119, p120, p121, p122, p123, p124, p125, p126, p127, p128, p129, p130, p131, p132, p133, p134, p135, p136, p137, p138, p139, p140, p141, p142, p143, p144, p145, p146, p147, p148, p149, p150, p151, p152, p153, p154, p155, p156, p157, p158, p159, p160, p161, p162, p163, p164, p165, p166, p167, p168, p169, p170, p171, p172, p173, p174, p175, p176, p177, p178, p179, p180, p181, p182, p183, p184, p185, p186, p187, p188, p189, p190, p191, p192, p193, p194, p195, p196, p197, p198, p199, p200, p201, p202, p203, p204, p205, p206, p207, p208, p209, p210, p211, p212, p213, p214, p215, p216, p217, p218, p219, p220, p221, p222, p223, p224, p225, p226, p227, p228, p229, p230, p231, p232, p233, p234, p235, p236, p237, p238, p239, p240, p241, p242, p243, p244, p245, p246, p247, p248, p249, p250) { p250 = p249 }") 207 208// Function with 251 named parameters is variable arguments 209testFirstFn("function f(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12, p13, p14, p15, p16, p17, p18, p19, p20, p21, p22, p23, p24, p25, p26, p27, p28, p29, p30, p31, p32, p33, p34, p35, p36, p37, p38, p39, p40, p41, p42, p43, p44, p45, p46, p47, p48, p49, p50, p51, p52, p53, p54, p55, p56, p57, p58, p59, p60, p61, p62, p63, p64, p65, p66, p67, p68, p69, p70, p71, p72, p73, p74, p75, p76, p77, p78, p79, p80, p81, p82, p83, p84, p85, p86, p87, p88, p89, p90, p91, p92, p93, p94, p95, p96, p97, p98, p99, p100, p101, p102, p103, p104, p105, p106, p107, p108, p109, p110, p111, p112, p113, p114, p115, p116, p117, p118, p119, p120, p121, p122, p123, p124, p125, p126, p127, p128, p129, p130, p131, p132, p133, p134, p135, p136, p137, p138, p139, p140, p141, p142, p143, p144, p145, p146, p147, p148, p149, p150, p151, p152, p153, p154, p155, p156, p157, p158, p159, p160, p161, p162, p163, p164, p165, p166, p167, p168, p169, p170, p171, p172, p173, p174, p175, p176, p177, p178, p179, p180, p181, p182, p183, p184, p185, p186, p187, p188, p189, p190, p191, p192, p193, p194, p195, p196, p197, p198, p199, p200, p201, p202, p203, p204, p205, p206, p207, p208, p209, p210, p211, p212, p213, p214, p215, p216, p217, p218, p219, p220, p221, p222, p223, p224, p225, p226, p227, p228, p229, p230, p231, p232, p233, p234, p235, p236, p237, p238, p239, p240, p241, p242, p243, p244, p245, p246, p247, p248, p249, p250, p251) { p250 = p251 }", 'isVarArg') 210