JDK-8006529.js revision 429:2c007a8bb0e7
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 Debug = Java.type("jdk.nashorn.internal.runtime.Debug") 55 56var parseMethod = Parser.class.getMethod("parse"); 57var compileMethod = Compiler.class.getMethod("compile", FunctionNode.class); 58var getBodyMethod = FunctionNode.class.getMethod("getBody"); 59var getStatementsMethod = Block.class.getMethod("getStatements"); 60var getInitMethod = VarNode.class.getMethod("getInit"); 61var getExpressionMethod = ExpressionStatement.class.getMethod("getExpression") 62var rhsMethod = UnaryNode.class.getMethod("rhs") 63var lhsMethod = BinaryNode.class.getMethod("lhs") 64var binaryRhsMethod = BinaryNode.class.getMethod("rhs") 65var debugIdMethod = Debug.class.getMethod("id", java.lang.Object.class) 66 67// These are method names of methods in FunctionNode class 68var allAssertionList = ['isVarArg', 'needsParentScope', 'needsCallee', 'hasScopeBlock', 'needsSelfSymbol', 'isSplit', 'hasEval', 'allVarsInScope', 'isStrict'] 69 70// corresponding Method objects of FunctionNode class 71var functionNodeMethods = {}; 72// initialize FunctionNode methods 73(function() { 74 for (var f in allAssertionList) { 75 var method = allAssertionList[f]; 76 functionNodeMethods[method] = FunctionNode.class.getMethod(method); 77 } 78})(); 79 80// returns functionNode.getBody().getStatements().get(0) 81function getFirstFunction(functionNode) { 82 var f = findFunction(getBodyMethod.invoke(functionNode)) 83 if (f == null) { 84 throw new Error(); 85 } 86 return f; 87} 88 89function findFunction(node) { 90 if(node instanceof Block) { 91 var stmts = getStatementsMethod.invoke(node) 92 for(var i = 0; i < stmts.size(); ++i) { 93 var retval = findFunction(stmts.get(i)) 94 if(retval != null) { 95 return retval; 96 } 97 } 98 } else if(node instanceof VarNode) { 99 return findFunction(getInitMethod.invoke(node)) 100 } else if(node instanceof UnaryNode) { 101 return findFunction(rhsMethod.invoke(node)) 102 } else if(node instanceof BinaryNode) { 103 return findFunction(lhsMethod.invoke(node)) || findFunction(binaryRhsMethod.invoke(node)) 104 } else if(node instanceof ExpressionStatement) { 105 return findFunction(getExpressionMethod.invoke(node)) 106 } else if(node instanceof FunctionNode) { 107 return node 108 } 109} 110 111var getContextMethod = Context.class.getMethod("getContext") 112var getEnvMethod = Context.class.getMethod("getEnv") 113 114// compile(script) -- compiles a script specified as a string with its 115// source code, returns a jdk.nashorn.internal.ir.FunctionNode object 116// representing it. 117function compile(source) { 118 var source = new Source("<no name>", source); 119 120 var env = getEnvMethod.invoke(getContextMethod.invoke(null)) 121 122 var parser = new Parser(env, source, new ThrowErrorManager()); 123 var func = parseMethod.invoke(parser); 124 125 var compiler = new Compiler(env); 126 127 return compileMethod.invoke(compiler, func); 128}; 129 130var allAssertions = (function() { 131 var allAssertions = {} 132 for(var assertion in allAssertionList) { 133 allAssertions[allAssertionList[assertion]] = true 134 } 135 return allAssertions; 136})(); 137 138 139// test(f[, assertions...]) tests whether all the specified assertions on the 140// passed function node are true. 141function test(f) { 142 var assertions = {} 143 for(var i = 1; i < arguments.length; ++i) { 144 var assertion = arguments[i] 145 if(!allAssertions[assertion]) { 146 throw "Unknown assertion " + assertion + " for " + f; 147 } 148 assertions[assertion] = true 149 } 150 for(var assertion in allAssertions) { 151 var expectedValue = !!assertions[assertion] 152 var actualValue = functionNodeMethods[assertion].invoke(f) 153 if(actualValue !== expectedValue) { 154 throw "Expected " + assertion + " === " + expectedValue + ", got " + actualValue + " for " + f + ":" + debugIdMethod.invoke(null, f); 155 } 156 } 157} 158 159// testFirstFn(script[, assertions...] tests whether all the specified 160// assertions are true in the first function in the given script; "script" 161// is a string with the source text of the script. 162function testFirstFn(script) { 163 arguments[0] = getFirstFunction(compile(script)) 164 test.apply(null, arguments) 165} 166 167// ---------------------------------- ACTUAL TESTS START HERE -------------- 168 169// The simplest possible functions have no attributes set 170testFirstFn("function f() { }") 171testFirstFn("function f(x) { x }") 172 173// A function referencing a global needs parent scope, and it needs callee 174// (because parent scope is passed through callee) 175testFirstFn("function f() { x }", 'needsCallee', 'needsParentScope') 176 177// A function referencing "arguments" will have to be vararg. It also needs 178// the callee, as it needs to fill out "arguments.callee". 179testFirstFn("function f() { arguments }", 'needsCallee', 'isVarArg') 180 181// A function referencing "arguments" will have to be vararg. If it is 182// strict, it will not have to have a callee, though. 183testFirstFn("function f() {'use strict'; arguments }", 'isVarArg', 'isStrict') 184 185// A function defining "arguments" as a parameter will not be vararg. 186testFirstFn("function f(arguments) { arguments }") 187 188// A function defining "arguments" as a nested function will not be vararg. 189testFirstFn("function f() { function arguments() {}; arguments; }") 190 191// A function defining "arguments" as a local variable will be vararg. 192testFirstFn("function f() { var arguments; arguments; }", 'isVarArg', 'needsCallee') 193 194// A self-referencing function defined as a statement doesn't need a self 195// symbol, as it'll rather obtain itself from the parent scope. 196testFirstFn("function f() { f() }", 'needsCallee', 'needsParentScope') 197 198// A self-referencing function defined as an expression needs a self symbol, 199// as it can't obtain itself from the parent scope. 200testFirstFn("(function f() { f() })", 'needsCallee', 'needsSelfSymbol') 201 202// A child function accessing parent's variable triggers the need for scope 203// in parent 204testFirstFn("(function f() { var x; function g() { x } })", 'hasScopeBlock') 205 206// A child function accessing parent's parameter triggers the need for scope 207// in parent 208testFirstFn("(function f(x) { function g() { x } })", 'hasScopeBlock') 209 210// A child function accessing a global variable triggers the need for parent 211// scope in parent 212testFirstFn("(function f() { function g() { x } })", 'needsParentScope', 'needsCallee') 213 214// A child function redefining a local variable from its parent should not 215// affect the parent function in any way 216testFirstFn("(function f() { var x; function g() { var x; x } })") 217 218// Using "with" on its own doesn't do much. 219testFirstFn("(function f() { var o; with(o) {} })") 220 221// "with" referencing a local variable triggers scoping. 222testFirstFn("(function f() { var x; var y; with(x) { y } })", 'hasScopeBlock') 223 224// "with" referencing a non-local variable triggers parent scope. 225testFirstFn("(function f() { var x; with(x) { y } })", 'needsCallee', 'needsParentScope') 226 227// Nested function using "with" is pretty much the same as the parent 228// function needing with. 229testFirstFn("(function f() { function g() { var o; with(o) {} } })") 230 231// Nested function using "with" referencing a local variable. 232testFirstFn("(function f() { var x; function g() { var o; with(o) { x } } })", 'hasScopeBlock') 233 234// Using "eval" triggers pretty much everything. The function even needs to be 235// vararg, 'cause we don't know if eval will be using "arguments". 236testFirstFn("(function f() { eval() })", 'needsParentScope', 'needsCallee', 'hasScopeBlock', 'hasEval', 'isVarArg', 'allVarsInScope') 237 238// Nested function using "eval" is almost the same as parent function using 239// eval, but at least the parent doesn't have to be vararg. 240testFirstFn("(function f() { function g() { eval() } })", 'needsParentScope', 'needsCallee', 'hasScopeBlock', 'allVarsInScope') 241 242// Function with 250 named parameters is ordinary 243testFirstFn("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 }") 244 245// Function with 251 named parameters is variable arguments 246testFirstFn("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') 247