JDK-8006529.js revision 868:f44ec6545b9a
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 forName = java.lang.Class["forName(String)"]; 43var Parser = forName("jdk.nashorn.internal.parser.Parser").static 44var Compiler = forName("jdk.nashorn.internal.codegen.Compiler").static 45var CompilationPhases = forName("jdk.nashorn.internal.codegen.Compiler$CompilationPhases").static; 46var Context = forName("jdk.nashorn.internal.runtime.Context").static 47var CodeInstaller = forName("jdk.nashorn.internal.runtime.CodeInstaller").static 48var ScriptEnvironment = forName("jdk.nashorn.internal.runtime.ScriptEnvironment").static 49var Source = forName("jdk.nashorn.internal.runtime.Source").static 50var FunctionNode = forName("jdk.nashorn.internal.ir.FunctionNode").static 51var Block = forName("jdk.nashorn.internal.ir.Block").static 52var VarNode = forName("jdk.nashorn.internal.ir.VarNode").static 53var ExpressionStatement = forName("jdk.nashorn.internal.ir.ExpressionStatement").static 54var UnaryNode = forName("jdk.nashorn.internal.ir.UnaryNode").static 55var BinaryNode = forName("jdk.nashorn.internal.ir.BinaryNode").static 56var ThrowErrorManager = forName("jdk.nashorn.internal.runtime.Context$ThrowErrorManager").static 57var ErrorManager = forName("jdk.nashorn.internal.runtime.ErrorManager").static 58var Debug = forName("jdk.nashorn.internal.runtime.Debug").static 59var String = forName("java.lang.String").static 60var boolean = Java.type("boolean"); 61 62var parseMethod = Parser.class.getMethod("parse"); 63var compileMethod = Compiler.class.getMethod("compile", FunctionNode.class, CompilationPhases.class); 64var getBodyMethod = FunctionNode.class.getMethod("getBody"); 65var getStatementsMethod = Block.class.getMethod("getStatements"); 66var getInitMethod = VarNode.class.getMethod("getInit"); 67var getExpressionMethod = ExpressionStatement.class.getMethod("getExpression") 68var rhsMethod = UnaryNode.class.getMethod("getExpression") 69var lhsMethod = BinaryNode.class.getMethod("lhs") 70var binaryRhsMethod = BinaryNode.class.getMethod("rhs") 71var debugIdMethod = Debug.class.getMethod("id", java.lang.Object.class) 72var compilePhases = CompilationPhases.class.getField("COMPILE_UPTO_BYTECODE").get(null); 73 74// These are method names of methods in FunctionNode class 75var allAssertionList = ['isVarArg', 'needsParentScope', 'needsCallee', 'hasScopeBlock', 'usesSelfSymbol', 'isSplit', 'hasEval', 'allVarsInScope', 'isStrict'] 76 77// corresponding Method objects of FunctionNode class 78var functionNodeMethods = {}; 79// initialize FunctionNode methods 80(function() { 81 for (var f in allAssertionList) { 82 var method = allAssertionList[f]; 83 functionNodeMethods[method] = FunctionNode.class.getMethod(method); 84 } 85})(); 86 87// returns functionNode.getBody().getStatements().get(0) 88function getFirstFunction(functionNode) { 89 var f = findFunction(getBodyMethod.invoke(functionNode)) 90 if (f == null) { 91 throw new Error(); 92 } 93 return f; 94} 95 96function findFunction(node) { 97 if(node instanceof Block) { 98 var stmts = getStatementsMethod.invoke(node) 99 for(var i = 0; i < stmts.size(); ++i) { 100 var retval = findFunction(stmts.get(i)) 101 if(retval != null) { 102 return retval; 103 } 104 } 105 } else if(node instanceof VarNode) { 106 return findFunction(getInitMethod.invoke(node)) 107 } else if(node instanceof UnaryNode) { 108 return findFunction(rhsMethod.invoke(node)) 109 } else if(node instanceof BinaryNode) { 110 return findFunction(lhsMethod.invoke(node)) || findFunction(binaryRhsMethod.invoke(node)) 111 } else if(node instanceof ExpressionStatement) { 112 return findFunction(getExpressionMethod.invoke(node)) 113 } else if(node instanceof FunctionNode) { 114 return node 115 } 116} 117 118var getContextMethod = Context.class.getMethod("getContext") 119var getEnvMethod = Context.class.getMethod("getEnv") 120 121var sourceForMethod = Source.class.getMethod("sourceFor", java.lang.String.class, java.lang.String.class) 122var ParserConstructor = Parser.class.getConstructor(ScriptEnvironment.class, Source.class, ErrorManager.class) 123var CompilerConstructor = Compiler.class.getConstructor(Context.class, ScriptEnvironment.class, CodeInstaller.class, Source.class, String.class, boolean.class); 124 125// compile(script) -- compiles a script specified as a string with its 126// source code, returns a jdk.nashorn.internal.ir.FunctionNode object 127// representing it. 128function compile(source, phases) { 129 var source = sourceForMethod.invoke(null, "<no name>", source); 130 131 var ctxt = getContextMethod.invoke(null); 132 var env = getEnvMethod.invoke(ctxt); 133 134 var parser = ParserConstructor.newInstance(env, source, ThrowErrorManager.class.newInstance()); 135 var func = parseMethod.invoke(parser); 136 137 var compiler = CompilerConstructor.newInstance(ctxt, env, null, source, null, false); 138 139 return compileMethod.invoke(compiler, func, phases); 140}; 141 142var allAssertions = (function() { 143 var allAssertions = {} 144 for(var assertion in allAssertionList) { 145 allAssertions[allAssertionList[assertion]] = true 146 } 147 return allAssertions; 148})(); 149 150 151// test(f[, assertions...]) tests whether all the specified assertions on the 152// passed function node are true. 153function test(f) { 154 var assertions = {} 155 for(var i = 1; i < arguments.length; ++i) { 156 var assertion = arguments[i] 157 if(!allAssertions[assertion]) { 158 throw "Unknown assertion " + assertion + " for " + f; 159 } 160 assertions[assertion] = true 161 } 162 for(var assertion in allAssertions) { 163 var expectedValue = !!assertions[assertion] 164 var actualValue = functionNodeMethods[assertion].invoke(f) 165 if(actualValue !== expectedValue) { 166 throw "Expected " + assertion + " === " + expectedValue + ", got " + actualValue + " for " + f + ":" + debugIdMethod.invoke(null, f); 167 } 168 } 169} 170 171// testFirstFn(script[, assertions...] tests whether all the specified 172// assertions are true in the first function in the given script; "script" 173// is a string with the source text of the script. 174function testFirstFn(script) { 175 arguments[0] = getFirstFunction(compile(script, compilePhases)); 176 test.apply(null, arguments); 177} 178 179// ---------------------------------- ACTUAL TESTS START HERE -------------- 180 181// The simplest possible functions have no attributes set 182testFirstFn("function f() { }") 183testFirstFn("function f(x) { x }") 184 185// A function referencing a global needs parent scope, and it needs callee 186// (because parent scope is passed through callee) 187testFirstFn("function f() { x }", 'needsCallee', 'needsParentScope') 188 189// A function referencing "arguments" will have to be vararg. It also needs 190// the callee, as it needs to fill out "arguments.callee". 191testFirstFn("function f() { arguments }", 'needsCallee', 'isVarArg') 192 193// A function referencing "arguments" will have to be vararg. If it is 194// strict, it will not have to have a callee, though. 195testFirstFn("function f() {'use strict'; arguments }", 'isVarArg', 'isStrict') 196 197// A function defining "arguments" as a parameter will not be vararg. 198testFirstFn("function f(arguments) { arguments }") 199 200// A function defining "arguments" as a nested function will not be vararg. 201testFirstFn("function f() { function arguments() {}; arguments; }") 202 203// A function defining "arguments" as a local variable will be vararg. 204testFirstFn("function f() { var arguments; arguments; }", 'isVarArg', 'needsCallee') 205 206// A self-referencing function defined as a statement doesn't need a self 207// symbol, as it'll rather obtain itself from the parent scope. 208testFirstFn("function f() { f() }", 'needsCallee', 'needsParentScope') 209 210// A self-referencing function defined as an expression needs a self symbol, 211// as it can't obtain itself from the parent scope. 212testFirstFn("(function f() { f() })", 'needsCallee', 'usesSelfSymbol') 213 214// A child function accessing parent's variable triggers the need for scope 215// in parent 216testFirstFn("(function f() { var x; function g() { x } })", 'hasScopeBlock') 217 218// A child function accessing parent's parameter triggers the need for scope 219// in parent 220testFirstFn("(function f(x) { function g() { x } })", 'hasScopeBlock') 221 222// A child function accessing a global variable triggers the need for parent 223// scope in parent 224testFirstFn("(function f() { function g() { x } })", 'needsParentScope', 'needsCallee') 225 226// A child function redefining a local variable from its parent should not 227// affect the parent function in any way 228testFirstFn("(function f() { var x; function g() { var x; x } })") 229 230// Using "with" on its own doesn't do much. 231testFirstFn("(function f() { var o; with(o) {} })") 232 233// "with" referencing a local variable triggers scoping. 234testFirstFn("(function f() { var x; var y; with(x) { y } })", 'hasScopeBlock') 235 236// "with" referencing a non-local variable triggers parent scope. 237testFirstFn("(function f() { var x; with(x) { y } })", 'needsCallee', 'needsParentScope') 238 239// Nested function using "with" is pretty much the same as the parent 240// function needing with. 241testFirstFn("(function f() { function g() { var o; with(o) {} } })") 242 243// Nested function using "with" referencing a local variable. 244testFirstFn("(function f() { var x; function g() { var o; with(o) { x } } })", 'hasScopeBlock') 245 246// Using "eval" triggers pretty much everything. The function even needs to be 247// vararg, 'cause we don't know if eval will be using "arguments". 248testFirstFn("(function f() { eval() })", 'usesSelfSymbol', 'needsParentScope', 'needsCallee', 'hasScopeBlock', 'hasEval', 'isVarArg', 'allVarsInScope') 249 250// Nested function using "eval" is almost the same as parent function using 251// eval, but at least the parent doesn't have to be vararg. 252testFirstFn("(function f() { function g() { eval() } })", 'usesSelfSymbol', 'needsParentScope', 'needsCallee', 'hasScopeBlock', 'allVarsInScope') 253 254// Function with 250 named parameters is ordinary 255testFirstFn("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 }") 256 257// Function with 251 named parameters is variable arguments 258// NOTE: hasScopeBlock should be optimized away. Implementation of JDK-8038942 should take care of it. 259testFirstFn("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', 'hasScopeBlock') 260