Thu, 12 Feb 2015 16:43:33 +0100
8072596: Arrays.asList results in ClassCastException with a JS array
Reviewed-by: lagergren, sundar
attila@90 | 1 | /* |
attila@90 | 2 | * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
attila@90 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
attila@90 | 4 | * |
attila@90 | 5 | * This code is free software; you can redistribute it and/or modify it |
attila@90 | 6 | * under the terms of the GNU General Public License version 2 only, as |
attila@90 | 7 | * published by the Free Software Foundation. Oracle designates this |
attila@90 | 8 | * particular file as subject to the "Classpath" exception as provided |
attila@90 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
attila@90 | 10 | * |
attila@90 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
attila@90 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
attila@90 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
attila@90 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
attila@90 | 15 | * accompanied this code). |
attila@90 | 16 | * |
attila@90 | 17 | * You should have received a copy of the GNU General Public License version |
attila@90 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
attila@90 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
attila@90 | 20 | * |
attila@90 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
attila@90 | 22 | * or visit www.oracle.com if you need additional information or have any |
attila@90 | 23 | * questions. |
attila@90 | 24 | */ |
attila@90 | 25 | |
attila@90 | 26 | /* |
attila@90 | 27 | * This file is available under and governed by the GNU General Public |
attila@90 | 28 | * License version 2 only, as published by the Free Software Foundation. |
attila@90 | 29 | * However, the following notice accompanied the original version of this |
attila@90 | 30 | * file, and Oracle licenses the original version of this file under the BSD |
attila@90 | 31 | * license: |
attila@90 | 32 | */ |
attila@90 | 33 | /* |
attila@90 | 34 | Copyright 2009-2013 Attila Szegedi |
attila@90 | 35 | |
attila@90 | 36 | Licensed under both the Apache License, Version 2.0 (the "Apache License") |
attila@90 | 37 | and the BSD License (the "BSD License"), with licensee being free to |
attila@90 | 38 | choose either of the two at their discretion. |
attila@90 | 39 | |
attila@90 | 40 | You may not use this file except in compliance with either the Apache |
attila@90 | 41 | License or the BSD License. |
attila@90 | 42 | |
attila@90 | 43 | If you choose to use this file in compliance with the Apache License, the |
attila@90 | 44 | following notice applies to you: |
attila@90 | 45 | |
attila@90 | 46 | You may obtain a copy of the Apache License at |
attila@90 | 47 | |
attila@90 | 48 | http://www.apache.org/licenses/LICENSE-2.0 |
attila@90 | 49 | |
attila@90 | 50 | Unless required by applicable law or agreed to in writing, software |
attila@90 | 51 | distributed under the License is distributed on an "AS IS" BASIS, |
attila@90 | 52 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
attila@90 | 53 | implied. See the License for the specific language governing |
attila@90 | 54 | permissions and limitations under the License. |
attila@90 | 55 | |
attila@90 | 56 | If you choose to use this file in compliance with the BSD License, the |
attila@90 | 57 | following notice applies to you: |
attila@90 | 58 | |
attila@90 | 59 | Redistribution and use in source and binary forms, with or without |
attila@90 | 60 | modification, are permitted provided that the following conditions are |
attila@90 | 61 | met: |
attila@90 | 62 | * Redistributions of source code must retain the above copyright |
attila@90 | 63 | notice, this list of conditions and the following disclaimer. |
attila@90 | 64 | * Redistributions in binary form must reproduce the above copyright |
attila@90 | 65 | notice, this list of conditions and the following disclaimer in the |
attila@90 | 66 | documentation and/or other materials provided with the distribution. |
attila@90 | 67 | * Neither the name of the copyright holder nor the names of |
attila@90 | 68 | contributors may be used to endorse or promote products derived from |
attila@90 | 69 | this software without specific prior written permission. |
attila@90 | 70 | |
attila@90 | 71 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
attila@90 | 72 | IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
attila@90 | 73 | TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
attila@90 | 74 | PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER |
attila@90 | 75 | BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
attila@90 | 76 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
attila@90 | 77 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
attila@90 | 78 | BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
attila@90 | 79 | WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
attila@90 | 80 | OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
attila@90 | 81 | ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
attila@90 | 82 | */ |
attila@90 | 83 | |
attila@90 | 84 | package jdk.internal.dynalink.beans; |
attila@90 | 85 | |
attila@90 | 86 | import java.lang.invoke.MethodHandle; |
attila@90 | 87 | import java.lang.invoke.MethodHandles; |
attila@90 | 88 | import java.lang.invoke.MethodType; |
attila@90 | 89 | import java.util.ArrayList; |
attila@90 | 90 | import java.util.Iterator; |
attila@90 | 91 | import java.util.List; |
attila@90 | 92 | import java.util.Map; |
attila@90 | 93 | import java.util.concurrent.ConcurrentHashMap; |
attila@90 | 94 | import jdk.internal.dynalink.linker.LinkerServices; |
attila@90 | 95 | import jdk.internal.dynalink.support.Lookup; |
attila@963 | 96 | import jdk.internal.dynalink.support.TypeUtilities; |
attila@90 | 97 | |
attila@90 | 98 | /** |
attila@90 | 99 | * Represents a subset of overloaded methods for a certain method name on a certain class. It can be either a fixarg or |
attila@90 | 100 | * a vararg subset depending on the subclass. The method is for a fixed number of arguments though (as it is generated |
attila@90 | 101 | * for a concrete call site). As such, all methods in the subset can be invoked with the specified number of arguments |
attila@90 | 102 | * (exactly matching for fixargs, or having less than or equal fixed arguments, for varargs). |
attila@90 | 103 | * |
attila@90 | 104 | * @author Attila Szegedi |
attila@90 | 105 | */ |
attila@90 | 106 | class OverloadedMethod { |
attila@90 | 107 | private final Map<ClassString, MethodHandle> argTypesToMethods = new ConcurrentHashMap<>(); |
attila@90 | 108 | private final OverloadedDynamicMethod parent; |
attila@90 | 109 | private final MethodType callSiteType; |
attila@90 | 110 | private final MethodHandle invoker; |
attila@90 | 111 | private final LinkerServices linkerServices; |
attila@90 | 112 | private final ArrayList<MethodHandle> fixArgMethods; |
attila@90 | 113 | private final ArrayList<MethodHandle> varArgMethods; |
attila@90 | 114 | |
attila@962 | 115 | OverloadedMethod(final List<MethodHandle> methodHandles, final OverloadedDynamicMethod parent, final MethodType callSiteType, |
attila@962 | 116 | final LinkerServices linkerServices) { |
attila@90 | 117 | this.parent = parent; |
attila@963 | 118 | final Class<?> commonRetType = getCommonReturnType(methodHandles); |
attila@963 | 119 | this.callSiteType = callSiteType.changeReturnType(commonRetType); |
attila@90 | 120 | this.linkerServices = linkerServices; |
attila@90 | 121 | |
attila@90 | 122 | fixArgMethods = new ArrayList<>(methodHandles.size()); |
attila@90 | 123 | varArgMethods = new ArrayList<>(methodHandles.size()); |
attila@90 | 124 | final int argNum = callSiteType.parameterCount(); |
attila@963 | 125 | for(MethodHandle mh: methodHandles) { |
attila@90 | 126 | if(mh.isVarargsCollector()) { |
attila@90 | 127 | final MethodHandle asFixed = mh.asFixedArity(); |
attila@90 | 128 | if(argNum == asFixed.type().parameterCount()) { |
attila@90 | 129 | fixArgMethods.add(asFixed); |
attila@90 | 130 | } |
attila@90 | 131 | varArgMethods.add(mh); |
attila@90 | 132 | } else { |
attila@90 | 133 | fixArgMethods.add(mh); |
attila@90 | 134 | } |
attila@90 | 135 | } |
attila@90 | 136 | fixArgMethods.trimToSize(); |
attila@90 | 137 | varArgMethods.trimToSize(); |
attila@90 | 138 | |
attila@90 | 139 | final MethodHandle bound = SELECT_METHOD.bindTo(this); |
attila@404 | 140 | final MethodHandle collecting = SingleDynamicMethod.collectArguments(bound, argNum).asType( |
attila@90 | 141 | callSiteType.changeReturnType(MethodHandle.class)); |
attila@1239 | 142 | invoker = linkerServices.asTypeLosslessReturn(MethodHandles.foldArguments( |
attila@1239 | 143 | MethodHandles.exactInvoker(this.callSiteType), collecting), callSiteType); |
attila@90 | 144 | } |
attila@90 | 145 | |
attila@90 | 146 | MethodHandle getInvoker() { |
attila@90 | 147 | return invoker; |
attila@90 | 148 | } |
attila@90 | 149 | |
attila@90 | 150 | private static final MethodHandle SELECT_METHOD = Lookup.findOwnSpecial(MethodHandles.lookup(), "selectMethod", |
attila@90 | 151 | MethodHandle.class, Object[].class); |
attila@90 | 152 | |
attila@90 | 153 | @SuppressWarnings("unused") |
attila@962 | 154 | private MethodHandle selectMethod(final Object[] args) throws NoSuchMethodException { |
attila@963 | 155 | final Class<?>[] argTypes = new Class<?>[args.length]; |
attila@90 | 156 | for(int i = 0; i < argTypes.length; ++i) { |
attila@90 | 157 | final Object arg = args[i]; |
attila@166 | 158 | argTypes[i] = arg == null ? ClassString.NULL_CLASS : arg.getClass(); |
attila@90 | 159 | } |
attila@90 | 160 | final ClassString classString = new ClassString(argTypes); |
attila@90 | 161 | MethodHandle method = argTypesToMethods.get(classString); |
attila@90 | 162 | if(method == null) { |
attila@90 | 163 | List<MethodHandle> methods = classString.getMaximallySpecifics(fixArgMethods, linkerServices, false); |
attila@90 | 164 | if(methods.isEmpty()) { |
attila@90 | 165 | methods = classString.getMaximallySpecifics(varArgMethods, linkerServices, true); |
attila@90 | 166 | } |
attila@90 | 167 | switch(methods.size()) { |
attila@90 | 168 | case 0: { |
attila@90 | 169 | method = getNoSuchMethodThrower(argTypes); |
attila@90 | 170 | break; |
attila@90 | 171 | } |
attila@90 | 172 | case 1: { |
attila@404 | 173 | method = SingleDynamicMethod.getInvocation(methods.get(0), callSiteType, linkerServices); |
attila@90 | 174 | break; |
attila@90 | 175 | } |
attila@90 | 176 | default: { |
attila@90 | 177 | // This is unfortunate - invocation time ambiguity. We can still save the day if |
attila@90 | 178 | method = getAmbiguousMethodThrower(argTypes, methods); |
attila@90 | 179 | break; |
attila@90 | 180 | } |
attila@90 | 181 | } |
attila@90 | 182 | // Avoid keeping references to unrelated classes; this ruins the performance a bit, but avoids class loader |
attila@90 | 183 | // memory leaks. |
attila@90 | 184 | if(classString.isVisibleFrom(parent.getClassLoader())) { |
attila@90 | 185 | argTypesToMethods.put(classString, method); |
attila@90 | 186 | } |
attila@90 | 187 | } |
attila@90 | 188 | return method; |
attila@90 | 189 | } |
attila@90 | 190 | |
attila@962 | 191 | private MethodHandle getNoSuchMethodThrower(final Class<?>[] argTypes) { |
attila@90 | 192 | return adaptThrower(MethodHandles.insertArguments(THROW_NO_SUCH_METHOD, 0, this, argTypes)); |
attila@90 | 193 | } |
attila@90 | 194 | |
attila@90 | 195 | private static final MethodHandle THROW_NO_SUCH_METHOD = Lookup.findOwnSpecial(MethodHandles.lookup(), |
attila@90 | 196 | "throwNoSuchMethod", void.class, Class[].class); |
attila@90 | 197 | |
attila@90 | 198 | @SuppressWarnings("unused") |
attila@962 | 199 | private void throwNoSuchMethod(final Class<?>[] argTypes) throws NoSuchMethodException { |
attila@90 | 200 | if(varArgMethods.isEmpty()) { |
attila@90 | 201 | throw new NoSuchMethodException("None of the fixed arity signatures " + getSignatureList(fixArgMethods) + |
attila@90 | 202 | " of method " + parent.getName() + " match the argument types " + argTypesString(argTypes)); |
attila@90 | 203 | } |
attila@90 | 204 | throw new NoSuchMethodException("None of the fixed arity signatures " + getSignatureList(fixArgMethods) + |
attila@90 | 205 | " or the variable arity signatures " + getSignatureList(varArgMethods) + " of the method " + |
attila@90 | 206 | parent.getName() + " match the argument types " + argTypesString(argTypes)); |
attila@90 | 207 | } |
attila@90 | 208 | |
attila@962 | 209 | private MethodHandle getAmbiguousMethodThrower(final Class<?>[] argTypes, final List<MethodHandle> methods) { |
attila@90 | 210 | return adaptThrower(MethodHandles.insertArguments(THROW_AMBIGUOUS_METHOD, 0, this, argTypes, methods)); |
attila@90 | 211 | } |
attila@90 | 212 | |
attila@962 | 213 | private MethodHandle adaptThrower(final MethodHandle rawThrower) { |
attila@90 | 214 | return MethodHandles.dropArguments(rawThrower, 0, callSiteType.parameterList()).asType(callSiteType); |
attila@90 | 215 | } |
attila@90 | 216 | |
attila@90 | 217 | private static final MethodHandle THROW_AMBIGUOUS_METHOD = Lookup.findOwnSpecial(MethodHandles.lookup(), |
attila@90 | 218 | "throwAmbiguousMethod", void.class, Class[].class, List.class); |
attila@90 | 219 | |
attila@90 | 220 | @SuppressWarnings("unused") |
attila@962 | 221 | private void throwAmbiguousMethod(final Class<?>[] argTypes, final List<MethodHandle> methods) throws NoSuchMethodException { |
attila@90 | 222 | final String arity = methods.get(0).isVarargsCollector() ? "variable" : "fixed"; |
attila@90 | 223 | throw new NoSuchMethodException("Can't unambiguously select between " + arity + " arity signatures " + |
attila@90 | 224 | getSignatureList(methods) + " of the method " + parent.getName() + " for argument types " + |
attila@90 | 225 | argTypesString(argTypes)); |
attila@90 | 226 | } |
attila@90 | 227 | |
attila@962 | 228 | private static String argTypesString(final Class<?>[] classes) { |
attila@90 | 229 | final StringBuilder b = new StringBuilder().append('['); |
attila@90 | 230 | appendTypes(b, classes, false); |
attila@90 | 231 | return b.append(']').toString(); |
attila@90 | 232 | } |
attila@90 | 233 | |
attila@962 | 234 | private static String getSignatureList(final List<MethodHandle> methods) { |
attila@90 | 235 | final StringBuilder b = new StringBuilder().append('['); |
attila@90 | 236 | final Iterator<MethodHandle> it = methods.iterator(); |
attila@90 | 237 | if(it.hasNext()) { |
attila@90 | 238 | appendSig(b, it.next()); |
attila@90 | 239 | while(it.hasNext()) { |
attila@90 | 240 | appendSig(b.append(", "), it.next()); |
attila@90 | 241 | } |
attila@90 | 242 | } |
attila@90 | 243 | return b.append(']').toString(); |
attila@90 | 244 | } |
attila@90 | 245 | |
attila@962 | 246 | private static void appendSig(final StringBuilder b, final MethodHandle m) { |
attila@90 | 247 | b.append('('); |
attila@90 | 248 | appendTypes(b, m.type().parameterArray(), m.isVarargsCollector()); |
attila@90 | 249 | b.append(')'); |
attila@90 | 250 | } |
attila@90 | 251 | |
attila@962 | 252 | private static void appendTypes(final StringBuilder b, final Class<?>[] classes, final boolean varArg) { |
attila@90 | 253 | final int l = classes.length; |
attila@90 | 254 | if(!varArg) { |
attila@90 | 255 | if(l > 1) { |
attila@90 | 256 | b.append(classes[1].getCanonicalName()); |
attila@90 | 257 | for(int i = 2; i < l; ++i) { |
attila@90 | 258 | b.append(", ").append(classes[i].getCanonicalName()); |
attila@90 | 259 | } |
attila@90 | 260 | } |
attila@90 | 261 | } else { |
attila@90 | 262 | for(int i = 1; i < l - 1; ++i) { |
attila@90 | 263 | b.append(classes[i].getCanonicalName()).append(", "); |
attila@90 | 264 | } |
attila@90 | 265 | b.append(classes[l - 1].getComponentType().getCanonicalName()).append("..."); |
attila@90 | 266 | } |
attila@90 | 267 | } |
attila@963 | 268 | |
attila@963 | 269 | private static Class<?> getCommonReturnType(final List<MethodHandle> methodHandles) { |
attila@963 | 270 | final Iterator<MethodHandle> it = methodHandles.iterator(); |
attila@963 | 271 | Class<?> retType = it.next().type().returnType(); |
attila@963 | 272 | while(it.hasNext()) { |
attila@963 | 273 | retType = TypeUtilities.getCommonLosslessConversionType(retType, it.next().type().returnType()); |
attila@963 | 274 | } |
attila@963 | 275 | return retType; |
attila@963 | 276 | } |
attila@101 | 277 | } |