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1 /* |
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2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 |
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24 /** |
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25 * JDK-8006529 : Methods should not always get callee parameter, and they |
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26 * should not be too eager in creation of scopes. |
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27 * |
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28 * @test |
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29 * @run |
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30 */ |
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31 |
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32 /* |
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33 * This test script depends on nashorn Compiler internals. It uses reflection |
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34 * to get access to private field and many public methods of Compiler and |
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35 * FunctionNode classes. Note that this is trusted code and access to such |
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36 * internal package classes and methods is okay. But, if you modify any |
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37 * Compiler or FunctionNode class, you may have to revisit this script. |
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38 * We cannot use direct Java class (via dynalink bean linker) to Compiler |
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39 * and FunctionNode because of package-access check and so reflective calls. |
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40 */ |
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41 |
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42 var Parser = Java.type("jdk.nashorn.internal.parser.Parser") |
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43 var Compiler = Java.type("jdk.nashorn.internal.codegen.Compiler") |
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44 var Context = Java.type("jdk.nashorn.internal.runtime.Context") |
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45 var ScriptEnvironment = Java.type("jdk.nashorn.internal.runtime.ScriptEnvironment") |
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46 var Source = Java.type("jdk.nashorn.internal.runtime.Source") |
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47 var FunctionNode = Java.type("jdk.nashorn.internal.ir.FunctionNode") |
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48 |
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49 // Compiler class methods and fields |
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50 var parseMethod = Parser.class.getMethod("parse"); |
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51 var compileMethod = Compiler.class.getMethod("compile"); |
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52 |
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53 // NOTE: private field. But this is a trusted test! |
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54 // Compiler.functionNode |
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55 var functionNodeField = Compiler.class.getDeclaredField("functionNode"); |
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56 functionNodeField.setAccessible(true); |
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57 |
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58 // FunctionNode methods |
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59 |
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60 // FunctionNode.getFunctions method |
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61 var getFunctionsMethod = FunctionNode.class.getMethod("getFunctions"); |
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62 |
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63 // These are method names of methods in FunctionNode class |
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64 var allAssertionList = ['isVarArg', 'needsParentScope', 'needsCallee', 'needsScope', 'needsSelfSymbol', 'isSplit', 'hasEval', 'hasWith', 'hasDeepWithOrEval', 'allVarsInScope', 'isStrictMode'] |
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65 |
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66 // corresponding Method objects of FunctionNode class |
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67 var functionNodeMethods = {}; |
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68 // initialize FunctionNode methods |
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69 (function() { |
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70 for (var f in allAssertionList) { |
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71 var method = allAssertionList[f]; |
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72 functionNodeMethods[method] = FunctionNode.class.getMethod(method); |
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73 } |
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74 })(); |
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75 |
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76 // returns "script" functionNode from Compiler instance |
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77 function getScriptNode(compiler) { |
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78 // compiler.functionNode |
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79 return functionNodeField.get(compiler); |
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80 } |
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81 |
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82 // returns functionNode.getFunctions().get(0) |
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83 function getFirstFunction(functionNode) { |
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84 // functionNode.getFunctions().get(0) |
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85 return getFunctionsMethod.invoke(functionNode).get(0); |
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86 } |
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87 |
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88 // compile(script) -- compiles a script specified as a string with its |
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89 // source code, returns a jdk.nashorn.internal.ir.FunctionNode object |
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90 // representing it. |
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91 function compile(source) { |
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92 var source = new Source("<no name>", source); |
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93 var parser = new Parser(Context.getContext().getEnv(), source, null); |
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94 var func = parseMethod.invoke(parser); |
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95 var compiler = new Compiler(Context.getContext().getEnv(), func); |
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96 |
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97 compileMethod.invoke(compiler); |
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98 |
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99 return getScriptNode(compiler); |
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100 }; |
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101 |
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102 var allAssertions = (function() { |
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103 var allAssertions = {} |
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104 for(var assertion in allAssertionList) { |
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105 allAssertions[allAssertionList[assertion]] = true |
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106 } |
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107 return allAssertions; |
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108 })(); |
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109 |
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110 |
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111 // test(f[, assertions...]) tests whether all the specified assertions on the |
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112 // passed function node are true. |
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113 function test(f) { |
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114 var assertions = {} |
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115 for(var i = 1; i < arguments.length; ++i) { |
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116 var assertion = arguments[i] |
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117 if(!allAssertions[assertion]) { |
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118 throw "Unknown assertion " + assertion + " for " + f; |
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119 } |
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120 assertions[assertion] = true |
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121 } |
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122 for(var assertion in allAssertions) { |
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123 var expectedValue = !!assertions[assertion] |
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124 if(functionNodeMethods[assertion].invoke(f) !== expectedValue) { |
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125 throw "Expected " + assertion + " === " + expectedValue + " for " + f; |
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126 } |
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127 } |
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128 } |
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129 |
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130 // testFirstFn(script[, assertions...] tests whether all the specified |
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131 // assertions are true in the first function in the given script; "script" |
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132 // is a string with the source text of the script. |
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133 function testFirstFn(script) { |
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134 arguments[0] = getFirstFunction(compile(script)) |
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135 test.apply(null, arguments) |
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136 } |
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137 |
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138 // ---------------------------------- ACTUAL TESTS START HERE -------------- |
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139 |
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140 // The simplest possible functions have no attributes set |
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141 testFirstFn("function f() { }") |
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142 testFirstFn("function f(x) { x }") |
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143 |
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144 // A function referencing a global needs parent scope, and it needs callee |
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145 // (because parent scope is passed through callee) |
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146 testFirstFn("function f() { x }", 'needsCallee', 'needsParentScope') |
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147 |
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148 // A function referencing "arguments" will have to be vararg. It also needs |
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149 // the callee, as it needs to fill out "arguments.callee". |
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150 testFirstFn("function f() { arguments }", 'needsCallee', 'isVarArg') |
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151 |
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152 // A function referencing "arguments" will have to be vararg. If it is |
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153 // strict, it will not have to have a callee, though. |
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154 testFirstFn("function f() {'use strict'; arguments }", 'isVarArg', 'isStrictMode') |
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155 |
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156 // A function defining "arguments" as a parameter will not be vararg. |
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157 testFirstFn("function f(arguments) { arguments }") |
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158 |
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159 // A function defining "arguments" as a nested function will not be vararg. |
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160 testFirstFn("function f() { function arguments() {}; arguments; }") |
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161 |
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162 // A function defining "arguments" as a local variable will be vararg. |
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163 testFirstFn("function f() { var arguments; arguments; }", 'isVarArg', 'needsCallee') |
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164 |
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165 // A self-referencing function defined as a statement doesn't need a self |
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166 // symbol, as it'll rather obtain itself from the parent scope. |
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167 testFirstFn("function f() { f() }", 'needsCallee', 'needsParentScope') |
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168 |
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169 // A self-referencing function defined as an expression needs a self symbol, |
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170 // as it can't obtain itself from the parent scope. |
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171 testFirstFn("(function f() { f() })", 'needsCallee', 'needsSelfSymbol') |
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172 |
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173 // A child function accessing parent's variable triggers the need for scope |
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174 // in parent |
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175 testFirstFn("(function f() { var x; function g() { x } })", 'needsScope') |
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176 |
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177 // A child function accessing parent's parameter triggers the need for scope |
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178 // in parent |
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179 testFirstFn("(function f(x) { function g() { x } })", 'needsScope') |
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180 |
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181 // A child function accessing a global variable triggers the need for parent |
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182 // scope in parent |
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183 testFirstFn("(function f() { function g() { x } })", 'needsParentScope', 'needsCallee') |
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184 |
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185 // A child function redefining a local variable from its parent should not |
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186 // affect the parent function in any way |
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187 testFirstFn("(function f() { var x; function g() { var x; x } })") |
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188 |
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189 // Using "with" unleashes a lot of needs: parent scope, callee, own scope, |
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190 // and all variables in scope. Actually, we could make "with" less wasteful, |
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191 // and only put those variables in scope that it actually references, similar |
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192 // to what nested functions do with variables in their parents. |
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193 testFirstFn("(function f() { var o; with(o) {} })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasWith', 'hasDeepWithOrEval', 'allVarsInScope') |
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194 |
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195 // Using "eval" is as bad as using "with" with the added requirement of |
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196 // being vararg, 'cause we don't know if eval will be using "arguments". |
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197 testFirstFn("(function f() { eval() })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasEval', 'isVarArg', 'hasDeepWithOrEval', 'allVarsInScope') |
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198 |
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199 // Nested function using "with" is pretty much the same as the parent |
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200 // function needing with. |
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201 testFirstFn("(function f() { function g() { var o; with(o) {} } })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasDeepWithOrEval', 'allVarsInScope') |
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202 // Nested function using "eval" is almost the same as parent function using |
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203 // eval, but at least the parent doesn't have to be vararg. |
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204 testFirstFn("(function f() { function g() { eval() } })", 'needsParentScope', 'needsCallee', 'needsScope', 'hasDeepWithOrEval', 'allVarsInScope') |
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205 |
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206 // Function with 250 named parameters is ordinary |
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207 testFirstFn("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 }") |
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208 |
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209 // Function with 251 named parameters is variable arguments |
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210 testFirstFn("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') |