JDK-8006529.js revision 463:a58a07a00122
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 ScriptEnvironment = Java.type("jdk.nashorn.internal.runtime.ScriptEnvironment") 46var Source = Java.type("jdk.nashorn.internal.runtime.Source") 47var FunctionNode = Java.type("jdk.nashorn.internal.ir.FunctionNode") 48var Block = Java.type("jdk.nashorn.internal.ir.Block") 49var VarNode = Java.type("jdk.nashorn.internal.ir.VarNode") 50var ExpressionStatement = Java.type("jdk.nashorn.internal.ir.ExpressionStatement") 51var UnaryNode = Java.type("jdk.nashorn.internal.ir.UnaryNode") 52var BinaryNode = Java.type("jdk.nashorn.internal.ir.BinaryNode") 53var ThrowErrorManager = Java.type("jdk.nashorn.internal.runtime.Context$ThrowErrorManager") 54var ErrorManager = Java.type("jdk.nashorn.internal.runtime.ErrorManager") 55var Debug = Java.type("jdk.nashorn.internal.runtime.Debug") 56 57var parseMethod = Parser.class.getMethod("parse"); 58var compileMethod = Compiler.class.getMethod("compile", FunctionNode.class); 59var getBodyMethod = FunctionNode.class.getMethod("getBody"); 60var getStatementsMethod = Block.class.getMethod("getStatements"); 61var getInitMethod = VarNode.class.getMethod("getInit"); 62var getExpressionMethod = ExpressionStatement.class.getMethod("getExpression") 63var rhsMethod = UnaryNode.class.getMethod("rhs") 64var lhsMethod = BinaryNode.class.getMethod("lhs") 65var binaryRhsMethod = BinaryNode.class.getMethod("rhs") 66var debugIdMethod = Debug.class.getMethod("id", java.lang.Object.class) 67 68// These are method names of methods in FunctionNode class 69var allAssertionList = ['isVarArg', 'needsParentScope', 'needsCallee', 'hasScopeBlock', 'needsSelfSymbol', 'isSplit', 'hasEval', 'allVarsInScope', 'isStrict'] 70 71// corresponding Method objects of FunctionNode class 72var functionNodeMethods = {}; 73// initialize FunctionNode methods 74(function() { 75 for (var f in allAssertionList) { 76 var method = allAssertionList[f]; 77 functionNodeMethods[method] = FunctionNode.class.getMethod(method); 78 } 79})(); 80 81// returns functionNode.getBody().getStatements().get(0) 82function getFirstFunction(functionNode) { 83 var f = findFunction(getBodyMethod.invoke(functionNode)) 84 if (f == null) { 85 throw new Error(); 86 } 87 return f; 88} 89 90function findFunction(node) { 91 if(node instanceof Block) { 92 var stmts = getStatementsMethod.invoke(node) 93 for(var i = 0; i < stmts.size(); ++i) { 94 var retval = findFunction(stmts.get(i)) 95 if(retval != null) { 96 return retval; 97 } 98 } 99 } else if(node instanceof VarNode) { 100 return findFunction(getInitMethod.invoke(node)) 101 } else if(node instanceof UnaryNode) { 102 return findFunction(rhsMethod.invoke(node)) 103 } else if(node instanceof BinaryNode) { 104 return findFunction(lhsMethod.invoke(node)) || findFunction(binaryRhsMethod.invoke(node)) 105 } else if(node instanceof ExpressionStatement) { 106 return findFunction(getExpressionMethod.invoke(node)) 107 } else if(node instanceof FunctionNode) { 108 return node 109 } 110} 111 112var getContextMethod = Context.class.getMethod("getContext") 113var getEnvMethod = Context.class.getMethod("getEnv") 114 115var SourceConstructor = Source.class.getConstructor(java.lang.String.class, java.lang.String.class) 116var ParserConstructor = Parser.class.getConstructor(ScriptEnvironment.class, Source.class, ErrorManager.class) 117var CompilerConstructor = Compiler.class.getConstructor(ScriptEnvironment.class) 118 119// compile(script) -- compiles a script specified as a string with its 120// source code, returns a jdk.nashorn.internal.ir.FunctionNode object 121// representing it. 122function compile(source) { 123 var source = SourceConstructor.newInstance("<no name>", source); 124 125 var env = getEnvMethod.invoke(getContextMethod.invoke(null)) 126 127 var parser = ParserConstructor.newInstance(env, source, new ThrowErrorManager()); 128 var func = parseMethod.invoke(parser); 129 130 var compiler = CompilerConstructor.newInstance(env); 131 132 return compileMethod.invoke(compiler, func); 133}; 134 135var allAssertions = (function() { 136 var allAssertions = {} 137 for(var assertion in allAssertionList) { 138 allAssertions[allAssertionList[assertion]] = true 139 } 140 return allAssertions; 141})(); 142 143 144// test(f[, assertions...]) tests whether all the specified assertions on the 145// passed function node are true. 146function test(f) { 147 var assertions = {} 148 for(var i = 1; i < arguments.length; ++i) { 149 var assertion = arguments[i] 150 if(!allAssertions[assertion]) { 151 throw "Unknown assertion " + assertion + " for " + f; 152 } 153 assertions[assertion] = true 154 } 155 for(var assertion in allAssertions) { 156 var expectedValue = !!assertions[assertion] 157 var actualValue = functionNodeMethods[assertion].invoke(f) 158 if(actualValue !== expectedValue) { 159 throw "Expected " + assertion + " === " + expectedValue + ", got " + actualValue + " for " + f + ":" + debugIdMethod.invoke(null, f); 160 } 161 } 162} 163 164// testFirstFn(script[, assertions...] tests whether all the specified 165// assertions are true in the first function in the given script; "script" 166// is a string with the source text of the script. 167function testFirstFn(script) { 168 arguments[0] = getFirstFunction(compile(script)) 169 test.apply(null, arguments) 170} 171 172// ---------------------------------- ACTUAL TESTS START HERE -------------- 173 174// The simplest possible functions have no attributes set 175testFirstFn("function f() { }") 176testFirstFn("function f(x) { x }") 177 178// A function referencing a global needs parent scope, and it needs callee 179// (because parent scope is passed through callee) 180testFirstFn("function f() { x }", 'needsCallee', 'needsParentScope') 181 182// A function referencing "arguments" will have to be vararg. It also needs 183// the callee, as it needs to fill out "arguments.callee". 184testFirstFn("function f() { arguments }", 'needsCallee', 'isVarArg') 185 186// A function referencing "arguments" will have to be vararg. If it is 187// strict, it will not have to have a callee, though. 188testFirstFn("function f() {'use strict'; arguments }", 'isVarArg', 'isStrict') 189 190// A function defining "arguments" as a parameter will not be vararg. 191testFirstFn("function f(arguments) { arguments }") 192 193// A function defining "arguments" as a nested function will not be vararg. 194testFirstFn("function f() { function arguments() {}; arguments; }") 195 196// A function defining "arguments" as a local variable will be vararg. 197testFirstFn("function f() { var arguments; arguments; }", 'isVarArg', 'needsCallee') 198 199// A self-referencing function defined as a statement doesn't need a self 200// symbol, as it'll rather obtain itself from the parent scope. 201testFirstFn("function f() { f() }", 'needsCallee', 'needsParentScope') 202 203// A self-referencing function defined as an expression needs a self symbol, 204// as it can't obtain itself from the parent scope. 205testFirstFn("(function f() { f() })", 'needsCallee', 'needsSelfSymbol') 206 207// A child function accessing parent's variable triggers the need for scope 208// in parent 209testFirstFn("(function f() { var x; function g() { x } })", 'hasScopeBlock') 210 211// A child function accessing parent's parameter triggers the need for scope 212// in parent 213testFirstFn("(function f(x) { function g() { x } })", 'hasScopeBlock') 214 215// A child function accessing a global variable triggers the need for parent 216// scope in parent 217testFirstFn("(function f() { function g() { x } })", 'needsParentScope', 'needsCallee') 218 219// A child function redefining a local variable from its parent should not 220// affect the parent function in any way 221testFirstFn("(function f() { var x; function g() { var x; x } })") 222 223// Using "with" on its own doesn't do much. 224testFirstFn("(function f() { var o; with(o) {} })") 225 226// "with" referencing a local variable triggers scoping. 227testFirstFn("(function f() { var x; var y; with(x) { y } })", 'hasScopeBlock') 228 229// "with" referencing a non-local variable triggers parent scope. 230testFirstFn("(function f() { var x; with(x) { y } })", 'needsCallee', 'needsParentScope') 231 232// Nested function using "with" is pretty much the same as the parent 233// function needing with. 234testFirstFn("(function f() { function g() { var o; with(o) {} } })") 235 236// Nested function using "with" referencing a local variable. 237testFirstFn("(function f() { var x; function g() { var o; with(o) { x } } })", 'hasScopeBlock') 238 239// Using "eval" triggers pretty much everything. The function even needs to be 240// vararg, 'cause we don't know if eval will be using "arguments". 241testFirstFn("(function f() { eval() })", 'needsParentScope', 'needsCallee', 'hasScopeBlock', 'hasEval', 'isVarArg', 'allVarsInScope') 242 243// Nested function using "eval" is almost the same as parent function using 244// eval, but at least the parent doesn't have to be vararg. 245testFirstFn("(function f() { function g() { eval() } })", 'needsParentScope', 'needsCallee', 'hasScopeBlock', 'allVarsInScope') 246 247// Function with 250 named parameters is ordinary 248testFirstFn("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 }") 249 250// Function with 251 named parameters is variable arguments 251testFirstFn("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') 252