JDK-8006529.js revision 88:43e32b36153c
1/* 2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24/** 25 * JDK-8006529 : Methods should not always get callee parameter, and they 26 * should not be too eager in creation of scopes. 27 * 28 * @test 29 * @run 30 */ 31 32/* 33 * This test script depends on nashorn Compiler internals. It uses reflection 34 * to get access to private field and many public methods of Compiler and 35 * FunctionNode classes. Note that this is trusted code and access to such 36 * internal package classes and methods is okay. But, if you modify any 37 * Compiler or FunctionNode class, you may have to revisit this script. 38 * We cannot use direct Java class (via dynalink bean linker) to Compiler 39 * and FunctionNode because of package-access check and so reflective calls. 40 */ 41 42var Parser = Java.type("jdk.nashorn.internal.parser.Parser") 43var Compiler = Java.type("jdk.nashorn.internal.codegen.Compiler") 44var Context = Java.type("jdk.nashorn.internal.runtime.Context") 45var Source = Java.type("jdk.nashorn.internal.runtime.Source") 46var FunctionNode = Java.type("jdk.nashorn.internal.ir.FunctionNode") 47 48// Compiler class methods and fields 49var parseMethod = Parser.class.getMethod("parse"); 50var compileMethod = Compiler.class.getMethod("compile"); 51 52// NOTE: private field. But this is a trusted test! 53// Compiler.functionNode 54var functionNodeField = Compiler.class.getDeclaredField("functionNode"); 55functionNodeField.setAccessible(true); 56 57// FunctionNode methods 58 59// FunctionNode.getFunctions method 60var getFunctionsMethod = FunctionNode.class.getMethod("getFunctions"); 61 62// These are method names of methods in FunctionNode class 63var allAssertionList = ['isVarArg', 'needsParentScope', 'needsCallee', 'needsScope', 'needsSelfSymbol', 'isSplit', 'hasEval', 'hasWith', 'hasDeepWithOrEval', 'varsInScope', 'isStrictMode'] 64 65// corresponding Method objects of FunctionNode class 66var functionNodeMethods = {}; 67// initialize FunctionNode methods 68(function() { 69 for (var f in allAssertionList) { 70 var method = allAssertionList[f]; 71 functionNodeMethods[method] = FunctionNode.class.getMethod(method); 72 } 73})(); 74 75// returns "script" functionNode from Compiler instance 76function getScriptNode(compiler) { 77 // compiler.functionNode 78 return functionNodeField.get(compiler); 79} 80 81// returns functionNode.getFunctions().get(0) 82function getFirstFunction(functionNode) { 83 // functionNode.getFunctions().get(0) 84 return getFunctionsMethod.invoke(functionNode).get(0); 85} 86 87// compile(script) -- compiles a script specified as a string with its 88// source code, returns a jdk.nashorn.internal.ir.FunctionNode object 89// representing it. 90function compile(source) { 91 var source = new Source("<no name>", source); 92 var parser = new Parser(Context.getContext(), source, null); 93 var func = parseMethod.invoke(parser); 94 var compiler = new Compiler(Context.getContext(), func); 95 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