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