Tue, 25 Nov 2014 13:37:34 -0800
8058112: Invalid BootstrapMethod for constructor/method reference
Summary: Bridge method references with functional interface method parameters of intersection type
Reviewed-by: vromero, dlsmith
rfield@1380 | 1 | /* |
ksrini@2251 | 2 | * Copyright (c) 2010, 2014, Oracle and/or its affiliates. All rights reserved. |
rfield@1380 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
rfield@1380 | 4 | * |
rfield@1380 | 5 | * This code is free software; you can redistribute it and/or modify it |
rfield@1380 | 6 | * under the terms of the GNU General Public License version 2 only, as |
rfield@1380 | 7 | * published by the Free Software Foundation. Oracle designates this |
rfield@1380 | 8 | * particular file as subject to the "Classpath" exception as provided |
rfield@1380 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
rfield@1380 | 10 | * |
rfield@1380 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
rfield@1380 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
rfield@1380 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
rfield@1380 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
rfield@1380 | 15 | * accompanied this code). |
rfield@1380 | 16 | * |
rfield@1380 | 17 | * You should have received a copy of the GNU General Public License version |
rfield@1380 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
rfield@1380 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
rfield@1380 | 20 | * |
rfield@1380 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
rfield@1380 | 22 | * or visit www.oracle.com if you need additional information or have any |
rfield@1380 | 23 | * questions. |
rfield@1380 | 24 | */ |
rfield@1380 | 25 | package com.sun.tools.javac.comp; |
rfield@1380 | 26 | |
rfield@1380 | 27 | import com.sun.tools.javac.tree.*; |
rfield@1380 | 28 | import com.sun.tools.javac.tree.JCTree.*; |
rfield@1380 | 29 | import com.sun.tools.javac.tree.JCTree.JCMemberReference.ReferenceKind; |
rfield@1380 | 30 | import com.sun.tools.javac.tree.TreeMaker; |
rfield@1380 | 31 | import com.sun.tools.javac.tree.TreeTranslator; |
jjg@1755 | 32 | import com.sun.tools.javac.code.Attribute; |
rfield@1380 | 33 | import com.sun.tools.javac.code.Kinds; |
rfield@1587 | 34 | import com.sun.tools.javac.code.Scope; |
rfield@1380 | 35 | import com.sun.tools.javac.code.Symbol; |
rfield@1380 | 36 | import com.sun.tools.javac.code.Symbol.ClassSymbol; |
rfield@1380 | 37 | import com.sun.tools.javac.code.Symbol.DynamicMethodSymbol; |
rfield@1380 | 38 | import com.sun.tools.javac.code.Symbol.MethodSymbol; |
rfield@2381 | 39 | import com.sun.tools.javac.code.Symbol.TypeSymbol; |
rfield@1380 | 40 | import com.sun.tools.javac.code.Symbol.VarSymbol; |
rfield@1380 | 41 | import com.sun.tools.javac.code.Symtab; |
rfield@1380 | 42 | import com.sun.tools.javac.code.Type; |
rfield@1380 | 43 | import com.sun.tools.javac.code.Type.MethodType; |
rfield@2614 | 44 | import com.sun.tools.javac.code.Type.TypeVar; |
rfield@1380 | 45 | import com.sun.tools.javac.code.Types; |
rfield@1717 | 46 | import com.sun.tools.javac.comp.LambdaToMethod.LambdaAnalyzerPreprocessor.*; |
mcimadamore@1612 | 47 | import com.sun.tools.javac.comp.Lower.BasicFreeVarCollector; |
rfield@1380 | 48 | import com.sun.tools.javac.jvm.*; |
rfield@1380 | 49 | import com.sun.tools.javac.util.*; |
rfield@1380 | 50 | import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; |
rfield@1380 | 51 | import com.sun.source.tree.MemberReferenceTree.ReferenceMode; |
rfield@1380 | 52 | |
ksrini@2155 | 53 | import java.util.EnumMap; |
rfield@1380 | 54 | import java.util.HashMap; |
rfield@2381 | 55 | import java.util.HashSet; |
rfield@1380 | 56 | import java.util.LinkedHashMap; |
rfield@1380 | 57 | import java.util.Map; |
rfield@2381 | 58 | import java.util.Set; |
rfield@1380 | 59 | |
rfield@1380 | 60 | import static com.sun.tools.javac.comp.LambdaToMethod.LambdaSymbolKind.*; |
rfield@1380 | 61 | import static com.sun.tools.javac.code.Flags.*; |
rfield@1380 | 62 | import static com.sun.tools.javac.code.Kinds.*; |
rfield@1587 | 63 | import static com.sun.tools.javac.code.TypeTag.*; |
rfield@1380 | 64 | import static com.sun.tools.javac.tree.JCTree.Tag.*; |
rfield@2614 | 65 | import javax.lang.model.type.TypeKind; |
rfield@1380 | 66 | |
rfield@1380 | 67 | /** |
rfield@1380 | 68 | * This pass desugars lambda expressions into static methods |
rfield@1380 | 69 | * |
rfield@1380 | 70 | * <p><b>This is NOT part of any supported API. |
rfield@1380 | 71 | * If you write code that depends on this, you do so at your own risk. |
rfield@1380 | 72 | * This code and its internal interfaces are subject to change or |
rfield@1380 | 73 | * deletion without notice.</b> |
rfield@1380 | 74 | */ |
rfield@1380 | 75 | public class LambdaToMethod extends TreeTranslator { |
rfield@1380 | 76 | |
ksrini@2155 | 77 | private Attr attr; |
mcimadamore@1817 | 78 | private JCDiagnostic.Factory diags; |
mcimadamore@1817 | 79 | private Log log; |
mcimadamore@1612 | 80 | private Lower lower; |
rfield@1380 | 81 | private Names names; |
rfield@1380 | 82 | private Symtab syms; |
rfield@1380 | 83 | private Resolve rs; |
rfield@1380 | 84 | private TreeMaker make; |
rfield@1380 | 85 | private Types types; |
rfield@1380 | 86 | private TransTypes transTypes; |
rfield@1380 | 87 | private Env<AttrContext> attrEnv; |
rfield@1380 | 88 | |
rfield@1380 | 89 | /** the analyzer scanner */ |
rfield@1717 | 90 | private LambdaAnalyzerPreprocessor analyzer; |
rfield@1380 | 91 | |
rfield@1380 | 92 | /** map from lambda trees to translation contexts */ |
rfield@1380 | 93 | private Map<JCTree, TranslationContext<?>> contextMap; |
rfield@1380 | 94 | |
rfield@1380 | 95 | /** current translation context (visitor argument) */ |
rfield@1380 | 96 | private TranslationContext<?> context; |
rfield@1380 | 97 | |
rfield@1587 | 98 | /** info about the current class being processed */ |
rfield@1587 | 99 | private KlassInfo kInfo; |
rfield@1587 | 100 | |
mcimadamore@1817 | 101 | /** dump statistics about lambda code generation */ |
mcimadamore@1817 | 102 | private boolean dumpLambdaToMethodStats; |
mcimadamore@1817 | 103 | |
ksrini@2251 | 104 | /** force serializable representation, for stress testing **/ |
ksrini@2251 | 105 | private final boolean forceSerializable; |
ksrini@2251 | 106 | |
rfield@1587 | 107 | /** Flag for alternate metafactories indicating the lambda object is intended to be serializable */ |
rfield@1587 | 108 | public static final int FLAG_SERIALIZABLE = 1 << 0; |
rfield@1587 | 109 | |
rfield@1587 | 110 | /** Flag for alternate metafactories indicating the lambda object has multiple targets */ |
rfield@1587 | 111 | public static final int FLAG_MARKERS = 1 << 1; |
rfield@1587 | 112 | |
mcimadamore@1882 | 113 | /** Flag for alternate metafactories indicating the lambda object requires multiple bridges */ |
mcimadamore@1882 | 114 | public static final int FLAG_BRIDGES = 1 << 2; |
mcimadamore@1882 | 115 | |
ksrini@2155 | 116 | // <editor-fold defaultstate="collapsed" desc="Instantiating"> |
ksrini@2155 | 117 | protected static final Context.Key<LambdaToMethod> unlambdaKey = |
ksrini@2155 | 118 | new Context.Key<LambdaToMethod>(); |
ksrini@2155 | 119 | |
ksrini@2155 | 120 | public static LambdaToMethod instance(Context context) { |
ksrini@2155 | 121 | LambdaToMethod instance = context.get(unlambdaKey); |
ksrini@2155 | 122 | if (instance == null) { |
ksrini@2155 | 123 | instance = new LambdaToMethod(context); |
ksrini@2155 | 124 | } |
ksrini@2155 | 125 | return instance; |
ksrini@2155 | 126 | } |
ksrini@2155 | 127 | private LambdaToMethod(Context context) { |
ksrini@2155 | 128 | context.put(unlambdaKey, this); |
ksrini@2155 | 129 | diags = JCDiagnostic.Factory.instance(context); |
ksrini@2155 | 130 | log = Log.instance(context); |
ksrini@2155 | 131 | lower = Lower.instance(context); |
ksrini@2155 | 132 | names = Names.instance(context); |
ksrini@2155 | 133 | syms = Symtab.instance(context); |
ksrini@2155 | 134 | rs = Resolve.instance(context); |
ksrini@2155 | 135 | make = TreeMaker.instance(context); |
ksrini@2155 | 136 | types = Types.instance(context); |
ksrini@2155 | 137 | transTypes = TransTypes.instance(context); |
ksrini@2155 | 138 | analyzer = new LambdaAnalyzerPreprocessor(); |
ksrini@2155 | 139 | Options options = Options.instance(context); |
ksrini@2155 | 140 | dumpLambdaToMethodStats = options.isSet("dumpLambdaToMethodStats"); |
ksrini@2155 | 141 | attr = Attr.instance(context); |
ksrini@2251 | 142 | forceSerializable = options.isSet("forceSerializable"); |
ksrini@2155 | 143 | } |
ksrini@2155 | 144 | // </editor-fold> |
ksrini@2155 | 145 | |
rfield@1587 | 146 | private class KlassInfo { |
rfield@1587 | 147 | |
rfield@1587 | 148 | /** |
rfield@1587 | 149 | * list of methods to append |
rfield@1587 | 150 | */ |
rfield@1587 | 151 | private ListBuffer<JCTree> appendedMethodList; |
rfield@1587 | 152 | |
rfield@1587 | 153 | /** |
rfield@1587 | 154 | * list of deserialization cases |
rfield@1587 | 155 | */ |
rfield@1587 | 156 | private final Map<String, ListBuffer<JCStatement>> deserializeCases; |
rfield@1587 | 157 | |
rfield@1587 | 158 | /** |
rfield@1587 | 159 | * deserialize method symbol |
rfield@1587 | 160 | */ |
rfield@1587 | 161 | private final MethodSymbol deserMethodSym; |
rfield@1587 | 162 | |
rfield@1587 | 163 | /** |
rfield@1587 | 164 | * deserialize method parameter symbol |
rfield@1587 | 165 | */ |
rfield@1587 | 166 | private final VarSymbol deserParamSym; |
rfield@1587 | 167 | |
jlahoda@2165 | 168 | private final JCClassDecl clazz; |
jlahoda@2165 | 169 | |
jlahoda@2165 | 170 | private KlassInfo(JCClassDecl clazz) { |
jlahoda@2165 | 171 | this.clazz = clazz; |
alundblad@2047 | 172 | appendedMethodList = new ListBuffer<>(); |
rfield@1587 | 173 | deserializeCases = new HashMap<String, ListBuffer<JCStatement>>(); |
rfield@1587 | 174 | MethodType type = new MethodType(List.of(syms.serializedLambdaType), syms.objectType, |
rfield@1587 | 175 | List.<Type>nil(), syms.methodClass); |
jlahoda@2165 | 176 | deserMethodSym = makePrivateSyntheticMethod(STATIC, names.deserializeLambda, type, clazz.sym); |
mcimadamore@1595 | 177 | deserParamSym = new VarSymbol(FINAL, names.fromString("lambda"), |
mcimadamore@1595 | 178 | syms.serializedLambdaType, deserMethodSym); |
rfield@1587 | 179 | } |
rfield@1587 | 180 | |
rfield@1587 | 181 | private void addMethod(JCTree decl) { |
rfield@1587 | 182 | appendedMethodList = appendedMethodList.prepend(decl); |
rfield@1587 | 183 | } |
rfield@1587 | 184 | } |
rfield@1380 | 185 | |
rfield@1380 | 186 | // <editor-fold defaultstate="collapsed" desc="translate methods"> |
rfield@1380 | 187 | @Override |
rfield@1380 | 188 | public <T extends JCTree> T translate(T tree) { |
rfield@1380 | 189 | TranslationContext<?> newContext = contextMap.get(tree); |
rfield@1380 | 190 | return translate(tree, newContext != null ? newContext : context); |
rfield@1380 | 191 | } |
rfield@1380 | 192 | |
rfield@1762 | 193 | <T extends JCTree> T translate(T tree, TranslationContext<?> newContext) { |
rfield@1380 | 194 | TranslationContext<?> prevContext = context; |
rfield@1380 | 195 | try { |
rfield@1380 | 196 | context = newContext; |
rfield@1380 | 197 | return super.translate(tree); |
rfield@1380 | 198 | } |
rfield@1380 | 199 | finally { |
rfield@1380 | 200 | context = prevContext; |
rfield@1380 | 201 | } |
rfield@1380 | 202 | } |
rfield@1380 | 203 | |
rfield@1762 | 204 | <T extends JCTree> List<T> translate(List<T> trees, TranslationContext<?> newContext) { |
alundblad@2047 | 205 | ListBuffer<T> buf = new ListBuffer<>(); |
rfield@1380 | 206 | for (T tree : trees) { |
rfield@1380 | 207 | buf.append(translate(tree, newContext)); |
rfield@1380 | 208 | } |
rfield@1380 | 209 | return buf.toList(); |
rfield@1380 | 210 | } |
rfield@1380 | 211 | |
rfield@1380 | 212 | public JCTree translateTopLevelClass(Env<AttrContext> env, JCTree cdef, TreeMaker make) { |
rfield@1380 | 213 | this.make = make; |
rfield@1380 | 214 | this.attrEnv = env; |
rfield@1380 | 215 | this.context = null; |
rfield@1380 | 216 | this.contextMap = new HashMap<JCTree, TranslationContext<?>>(); |
rfield@1380 | 217 | return translate(cdef); |
rfield@1380 | 218 | } |
rfield@1380 | 219 | // </editor-fold> |
rfield@1380 | 220 | |
rfield@1380 | 221 | // <editor-fold defaultstate="collapsed" desc="visitor methods"> |
rfield@1380 | 222 | /** |
rfield@1380 | 223 | * Visit a class. |
rfield@1380 | 224 | * Maintain the translatedMethodList across nested classes. |
rfield@1380 | 225 | * Append the translatedMethodList to the class after it is translated. |
rfield@1380 | 226 | * @param tree |
rfield@1380 | 227 | */ |
rfield@1380 | 228 | @Override |
rfield@1380 | 229 | public void visitClassDef(JCClassDecl tree) { |
rfield@1380 | 230 | if (tree.sym.owner.kind == PCK) { |
rfield@1380 | 231 | //analyze class |
rfield@1717 | 232 | tree = analyzer.analyzeAndPreprocessClass(tree); |
rfield@1380 | 233 | } |
rfield@1587 | 234 | KlassInfo prevKlassInfo = kInfo; |
rfield@1380 | 235 | try { |
jlahoda@2165 | 236 | kInfo = new KlassInfo(tree); |
rfield@1380 | 237 | super.visitClassDef(tree); |
rfield@1587 | 238 | if (!kInfo.deserializeCases.isEmpty()) { |
jlahoda@2165 | 239 | int prevPos = make.pos; |
jlahoda@2165 | 240 | try { |
jlahoda@2165 | 241 | make.at(tree); |
jlahoda@2165 | 242 | kInfo.addMethod(makeDeserializeMethod(tree.sym)); |
jlahoda@2165 | 243 | } finally { |
jlahoda@2165 | 244 | make.at(prevPos); |
jlahoda@2165 | 245 | } |
rfield@1587 | 246 | } |
rfield@1380 | 247 | //add all translated instance methods here |
rfield@1587 | 248 | List<JCTree> newMethods = kInfo.appendedMethodList.toList(); |
rfield@1587 | 249 | tree.defs = tree.defs.appendList(newMethods); |
rfield@1587 | 250 | for (JCTree lambda : newMethods) { |
rfield@1380 | 251 | tree.sym.members().enter(((JCMethodDecl)lambda).sym); |
rfield@1380 | 252 | } |
rfield@1380 | 253 | result = tree; |
rfield@1380 | 254 | } finally { |
rfield@1587 | 255 | kInfo = prevKlassInfo; |
rfield@1380 | 256 | } |
rfield@1380 | 257 | } |
rfield@1380 | 258 | |
rfield@1380 | 259 | /** |
rfield@1380 | 260 | * Translate a lambda into a method to be inserted into the class. |
rfield@1380 | 261 | * Then replace the lambda site with an invokedynamic call of to lambda |
rfield@1380 | 262 | * meta-factory, which will use the lambda method. |
rfield@1380 | 263 | * @param tree |
rfield@1380 | 264 | */ |
rfield@1380 | 265 | @Override |
rfield@1380 | 266 | public void visitLambda(JCLambda tree) { |
rfield@1380 | 267 | LambdaTranslationContext localContext = (LambdaTranslationContext)context; |
rfield@1380 | 268 | MethodSymbol sym = (MethodSymbol)localContext.translatedSym; |
rfield@1380 | 269 | MethodType lambdaType = (MethodType) sym.type; |
rfield@1380 | 270 | |
jjg@1755 | 271 | { |
jjg@1969 | 272 | Symbol owner = localContext.owner; |
jjg@1755 | 273 | ListBuffer<Attribute.TypeCompound> ownerTypeAnnos = new ListBuffer<Attribute.TypeCompound>(); |
jjg@1755 | 274 | ListBuffer<Attribute.TypeCompound> lambdaTypeAnnos = new ListBuffer<Attribute.TypeCompound>(); |
jjg@1755 | 275 | |
jjg@1755 | 276 | for (Attribute.TypeCompound tc : owner.getRawTypeAttributes()) { |
jjg@1755 | 277 | if (tc.position.onLambda == tree) { |
jjg@1755 | 278 | lambdaTypeAnnos.append(tc); |
jjg@1755 | 279 | } else { |
jjg@1755 | 280 | ownerTypeAnnos.append(tc); |
jjg@1755 | 281 | } |
jjg@1755 | 282 | } |
jjg@1755 | 283 | if (lambdaTypeAnnos.nonEmpty()) { |
jjg@1802 | 284 | owner.setTypeAttributes(ownerTypeAnnos.toList()); |
jjg@1802 | 285 | sym.setTypeAttributes(lambdaTypeAnnos.toList()); |
jjg@1755 | 286 | } |
jjg@1755 | 287 | } |
jjg@1755 | 288 | |
rfield@1380 | 289 | //create the method declaration hoisting the lambda body |
rfield@1380 | 290 | JCMethodDecl lambdaDecl = make.MethodDef(make.Modifiers(sym.flags_field), |
rfield@1380 | 291 | sym.name, |
rfield@1380 | 292 | make.QualIdent(lambdaType.getReturnType().tsym), |
rfield@1380 | 293 | List.<JCTypeParameter>nil(), |
rfield@1380 | 294 | localContext.syntheticParams, |
rfield@1380 | 295 | lambdaType.getThrownTypes() == null ? |
rfield@1380 | 296 | List.<JCExpression>nil() : |
rfield@1380 | 297 | make.Types(lambdaType.getThrownTypes()), |
rfield@1380 | 298 | null, |
rfield@1380 | 299 | null); |
rfield@1380 | 300 | lambdaDecl.sym = sym; |
rfield@1380 | 301 | lambdaDecl.type = lambdaType; |
rfield@1380 | 302 | |
rfield@1380 | 303 | //translate lambda body |
rfield@1380 | 304 | //As the lambda body is translated, all references to lambda locals, |
rfield@1380 | 305 | //captured variables, enclosing members are adjusted accordingly |
rfield@1380 | 306 | //to refer to the static method parameters (rather than i.e. acessing to |
rfield@1380 | 307 | //captured members directly). |
rfield@1380 | 308 | lambdaDecl.body = translate(makeLambdaBody(tree, lambdaDecl)); |
rfield@1380 | 309 | |
rfield@1380 | 310 | //Add the method to the list of methods to be added to this class. |
rfield@1587 | 311 | kInfo.addMethod(lambdaDecl); |
rfield@1380 | 312 | |
rfield@1380 | 313 | //now that we have generated a method for the lambda expression, |
rfield@1380 | 314 | //we can translate the lambda into a method reference pointing to the newly |
rfield@1380 | 315 | //created method. |
rfield@1380 | 316 | // |
rfield@1380 | 317 | //Note that we need to adjust the method handle so that it will match the |
rfield@1380 | 318 | //signature of the SAM descriptor - this means that the method reference |
rfield@1380 | 319 | //should be added the following synthetic arguments: |
rfield@1380 | 320 | // |
rfield@1380 | 321 | // * the "this" argument if it is an instance method |
rfield@1380 | 322 | // * enclosing locals captured by the lambda expression |
rfield@1380 | 323 | |
alundblad@2047 | 324 | ListBuffer<JCExpression> syntheticInits = new ListBuffer<>(); |
rfield@1380 | 325 | |
rfield@2607 | 326 | if (localContext.methodReferenceReceiver != null) { |
rfield@2607 | 327 | syntheticInits.append(localContext.methodReferenceReceiver); |
rfield@2607 | 328 | } else if (!sym.isStatic()) { |
rfield@1380 | 329 | syntheticInits.append(makeThis( |
rfield@1587 | 330 | sym.owner.enclClass().asType(), |
rfield@1380 | 331 | localContext.owner.enclClass())); |
rfield@1380 | 332 | } |
rfield@1380 | 333 | |
rfield@1380 | 334 | //add captured locals |
rfield@1380 | 335 | for (Symbol fv : localContext.getSymbolMap(CAPTURED_VAR).keySet()) { |
rfield@1380 | 336 | if (fv != localContext.self) { |
rfield@1380 | 337 | JCTree captured_local = make.Ident(fv).setType(fv.type); |
rfield@1380 | 338 | syntheticInits.append((JCExpression) captured_local); |
rfield@1380 | 339 | } |
rfield@1380 | 340 | } |
rfield@1380 | 341 | |
rfield@1380 | 342 | //then, determine the arguments to the indy call |
rfield@1380 | 343 | List<JCExpression> indy_args = translate(syntheticInits.toList(), localContext.prev); |
rfield@1380 | 344 | |
rfield@1380 | 345 | //build a sam instance using an indy call to the meta-factory |
rfield@1380 | 346 | int refKind = referenceKind(sym); |
rfield@1380 | 347 | |
rfield@1380 | 348 | //convert to an invokedynamic call |
mcimadamore@1882 | 349 | result = makeMetafactoryIndyCall(context, refKind, sym, indy_args); |
rfield@1380 | 350 | } |
rfield@1380 | 351 | |
rfield@1380 | 352 | private JCIdent makeThis(Type type, Symbol owner) { |
rfield@1380 | 353 | VarSymbol _this = new VarSymbol(PARAMETER | FINAL | SYNTHETIC, |
rfield@1380 | 354 | names._this, |
rfield@1380 | 355 | type, |
rfield@1380 | 356 | owner); |
rfield@1380 | 357 | return make.Ident(_this); |
rfield@1380 | 358 | } |
rfield@1380 | 359 | |
rfield@1380 | 360 | /** |
rfield@1380 | 361 | * Translate a method reference into an invokedynamic call to the |
rfield@1380 | 362 | * meta-factory. |
rfield@1380 | 363 | * @param tree |
rfield@1380 | 364 | */ |
rfield@1380 | 365 | @Override |
rfield@1380 | 366 | public void visitReference(JCMemberReference tree) { |
rfield@1380 | 367 | ReferenceTranslationContext localContext = (ReferenceTranslationContext)context; |
rfield@1380 | 368 | |
rfield@1380 | 369 | //first determine the method symbol to be used to generate the sam instance |
rfield@1380 | 370 | //this is either the method reference symbol, or the bridged reference symbol |
rfield@2607 | 371 | Symbol refSym = localContext.isSignaturePolymorphic() |
rfield@2202 | 372 | ? localContext.sigPolySym |
rfield@2202 | 373 | : tree.sym; |
rfield@1380 | 374 | |
rfield@1380 | 375 | //the qualifying expression is treated as a special captured arg |
rfield@1380 | 376 | JCExpression init; |
rfield@1380 | 377 | switch(tree.kind) { |
rfield@1380 | 378 | |
mcimadamore@1435 | 379 | case IMPLICIT_INNER: /** Inner :: new */ |
mcimadamore@1435 | 380 | case SUPER: /** super :: instMethod */ |
rfield@1380 | 381 | init = makeThis( |
rfield@1587 | 382 | localContext.owner.enclClass().asType(), |
rfield@1587 | 383 | localContext.owner.enclClass()); |
rfield@1380 | 384 | break; |
rfield@1380 | 385 | |
mcimadamore@1435 | 386 | case BOUND: /** Expr :: instMethod */ |
rfield@1380 | 387 | init = tree.getQualifierExpression(); |
vromero@2043 | 388 | init = attr.makeNullCheck(init); |
rfield@1380 | 389 | break; |
rfield@1380 | 390 | |
mcimadamore@1435 | 391 | case UNBOUND: /** Type :: instMethod */ |
mcimadamore@1435 | 392 | case STATIC: /** Type :: staticMethod */ |
mcimadamore@1435 | 393 | case TOPLEVEL: /** Top level :: new */ |
mcimadamore@1496 | 394 | case ARRAY_CTOR: /** ArrayType :: new */ |
rfield@1380 | 395 | init = null; |
rfield@1380 | 396 | break; |
rfield@1380 | 397 | |
rfield@1380 | 398 | default: |
rfield@1380 | 399 | throw new InternalError("Should not have an invalid kind"); |
rfield@1380 | 400 | } |
rfield@1380 | 401 | |
rfield@1380 | 402 | List<JCExpression> indy_args = init==null? List.<JCExpression>nil() : translate(List.of(init), localContext.prev); |
rfield@1380 | 403 | |
rfield@1380 | 404 | |
rfield@1380 | 405 | //build a sam instance using an indy call to the meta-factory |
mcimadamore@1882 | 406 | result = makeMetafactoryIndyCall(localContext, localContext.referenceKind(), refSym, indy_args); |
rfield@1380 | 407 | } |
rfield@1380 | 408 | |
rfield@1380 | 409 | /** |
rfield@1380 | 410 | * Translate identifiers within a lambda to the mapped identifier |
rfield@1380 | 411 | * @param tree |
rfield@1380 | 412 | */ |
rfield@1380 | 413 | @Override |
rfield@1380 | 414 | public void visitIdent(JCIdent tree) { |
rfield@1380 | 415 | if (context == null || !analyzer.lambdaIdentSymbolFilter(tree.sym)) { |
rfield@1380 | 416 | super.visitIdent(tree); |
rfield@1380 | 417 | } else { |
jlahoda@2165 | 418 | int prevPos = make.pos; |
jlahoda@2165 | 419 | try { |
jlahoda@2165 | 420 | make.at(tree); |
jlahoda@2165 | 421 | |
jlahoda@2165 | 422 | LambdaTranslationContext lambdaContext = (LambdaTranslationContext) context; |
jlahoda@2165 | 423 | JCTree ltree = lambdaContext.translate(tree); |
jlahoda@2165 | 424 | if (ltree != null) { |
jlahoda@2165 | 425 | result = ltree; |
jlahoda@2165 | 426 | } else { |
jlahoda@2165 | 427 | //access to untranslated symbols (i.e. compile-time constants, |
jlahoda@2165 | 428 | //members defined inside the lambda body, etc.) ) |
jlahoda@2165 | 429 | super.visitIdent(tree); |
jlahoda@2165 | 430 | } |
jlahoda@2165 | 431 | } finally { |
jlahoda@2165 | 432 | make.at(prevPos); |
rfield@1380 | 433 | } |
rfield@1380 | 434 | } |
rfield@1380 | 435 | } |
rfield@1380 | 436 | |
rfield@1380 | 437 | @Override |
rfield@1380 | 438 | public void visitVarDef(JCVariableDecl tree) { |
rfield@1380 | 439 | LambdaTranslationContext lambdaContext = (LambdaTranslationContext)context; |
rfield@1380 | 440 | if (context != null && lambdaContext.getSymbolMap(LOCAL_VAR).containsKey(tree.sym)) { |
rfield@2380 | 441 | tree.init = translate(tree.init); |
rfield@2380 | 442 | tree.sym = (VarSymbol) lambdaContext.getSymbolMap(LOCAL_VAR).get(tree.sym); |
rfield@2380 | 443 | result = tree; |
rfield@1587 | 444 | } else if (context != null && lambdaContext.getSymbolMap(TYPE_VAR).containsKey(tree.sym)) { |
rfield@1587 | 445 | JCExpression init = translate(tree.init); |
rfield@1587 | 446 | VarSymbol xsym = (VarSymbol)lambdaContext.getSymbolMap(TYPE_VAR).get(tree.sym); |
jlahoda@2165 | 447 | int prevPos = make.pos; |
jlahoda@2165 | 448 | try { |
jlahoda@2165 | 449 | result = make.at(tree).VarDef(xsym, init); |
jlahoda@2165 | 450 | } finally { |
jlahoda@2165 | 451 | make.at(prevPos); |
jlahoda@2165 | 452 | } |
rfield@1587 | 453 | // Replace the entered symbol for this variable |
rfield@1587 | 454 | Scope sc = tree.sym.owner.members(); |
rfield@1587 | 455 | if (sc != null) { |
rfield@1587 | 456 | sc.remove(tree.sym); |
rfield@1587 | 457 | sc.enter(xsym); |
rfield@1587 | 458 | } |
rfield@1380 | 459 | } else { |
rfield@1380 | 460 | super.visitVarDef(tree); |
rfield@1380 | 461 | } |
rfield@1380 | 462 | } |
rfield@1380 | 463 | |
rfield@1380 | 464 | // </editor-fold> |
rfield@1380 | 465 | |
rfield@1380 | 466 | // <editor-fold defaultstate="collapsed" desc="Translation helper methods"> |
rfield@1380 | 467 | |
rfield@1380 | 468 | private JCBlock makeLambdaBody(JCLambda tree, JCMethodDecl lambdaMethodDecl) { |
rfield@1380 | 469 | return tree.getBodyKind() == JCLambda.BodyKind.EXPRESSION ? |
rfield@1380 | 470 | makeLambdaExpressionBody((JCExpression)tree.body, lambdaMethodDecl) : |
rfield@1380 | 471 | makeLambdaStatementBody((JCBlock)tree.body, lambdaMethodDecl, tree.canCompleteNormally); |
rfield@1380 | 472 | } |
rfield@1380 | 473 | |
rfield@1380 | 474 | private JCBlock makeLambdaExpressionBody(JCExpression expr, JCMethodDecl lambdaMethodDecl) { |
rfield@1380 | 475 | Type restype = lambdaMethodDecl.type.getReturnType(); |
rfield@1380 | 476 | boolean isLambda_void = expr.type.hasTag(VOID); |
rfield@1380 | 477 | boolean isTarget_void = restype.hasTag(VOID); |
rfield@1380 | 478 | boolean isTarget_Void = types.isSameType(restype, types.boxedClass(syms.voidType).type); |
jlahoda@2165 | 479 | int prevPos = make.pos; |
jlahoda@2165 | 480 | try { |
jlahoda@2165 | 481 | if (isTarget_void) { |
jlahoda@2165 | 482 | //target is void: |
jlahoda@2165 | 483 | // BODY; |
jlahoda@2165 | 484 | JCStatement stat = make.at(expr).Exec(expr); |
jlahoda@2165 | 485 | return make.Block(0, List.<JCStatement>of(stat)); |
jlahoda@2165 | 486 | } else if (isLambda_void && isTarget_Void) { |
jlahoda@2165 | 487 | //void to Void conversion: |
jlahoda@2165 | 488 | // BODY; return null; |
jlahoda@2165 | 489 | ListBuffer<JCStatement> stats = new ListBuffer<>(); |
jlahoda@2165 | 490 | stats.append(make.at(expr).Exec(expr)); |
jlahoda@2165 | 491 | stats.append(make.Return(make.Literal(BOT, null).setType(syms.botType))); |
jlahoda@2165 | 492 | return make.Block(0, stats.toList()); |
jlahoda@2165 | 493 | } else { |
jlahoda@2165 | 494 | //non-void to non-void conversion: |
jlahoda@2165 | 495 | // return (TYPE)BODY; |
jlahoda@2165 | 496 | JCExpression retExpr = transTypes.coerce(attrEnv, expr, restype); |
jlahoda@2165 | 497 | return make.at(retExpr).Block(0, List.<JCStatement>of(make.Return(retExpr))); |
jlahoda@2165 | 498 | } |
jlahoda@2165 | 499 | } finally { |
jlahoda@2165 | 500 | make.at(prevPos); |
rfield@1380 | 501 | } |
rfield@1380 | 502 | } |
rfield@1380 | 503 | |
rfield@1380 | 504 | private JCBlock makeLambdaStatementBody(JCBlock block, final JCMethodDecl lambdaMethodDecl, boolean completeNormally) { |
rfield@1380 | 505 | final Type restype = lambdaMethodDecl.type.getReturnType(); |
rfield@1380 | 506 | final boolean isTarget_void = restype.hasTag(VOID); |
rfield@1380 | 507 | boolean isTarget_Void = types.isSameType(restype, types.boxedClass(syms.voidType).type); |
rfield@1380 | 508 | |
rfield@1380 | 509 | class LambdaBodyTranslator extends TreeTranslator { |
rfield@1380 | 510 | |
rfield@1380 | 511 | @Override |
rfield@1380 | 512 | public void visitClassDef(JCClassDecl tree) { |
rfield@1380 | 513 | //do NOT recurse on any inner classes |
rfield@1380 | 514 | result = tree; |
rfield@1380 | 515 | } |
rfield@1380 | 516 | |
rfield@1380 | 517 | @Override |
rfield@1380 | 518 | public void visitLambda(JCLambda tree) { |
rfield@1380 | 519 | //do NOT recurse on any nested lambdas |
rfield@1380 | 520 | result = tree; |
rfield@1380 | 521 | } |
rfield@1380 | 522 | |
rfield@1380 | 523 | @Override |
rfield@1380 | 524 | public void visitReturn(JCReturn tree) { |
rfield@1380 | 525 | boolean isLambda_void = tree.expr == null; |
rfield@1380 | 526 | if (isTarget_void && !isLambda_void) { |
rfield@1380 | 527 | //Void to void conversion: |
rfield@1380 | 528 | // { TYPE $loc = RET-EXPR; return; } |
rfield@1380 | 529 | VarSymbol loc = makeSyntheticVar(0, names.fromString("$loc"), tree.expr.type, lambdaMethodDecl.sym); |
rfield@1380 | 530 | JCVariableDecl varDef = make.VarDef(loc, tree.expr); |
rfield@1380 | 531 | result = make.Block(0, List.<JCStatement>of(varDef, make.Return(null))); |
rfield@1380 | 532 | } else if (!isTarget_void || !isLambda_void) { |
rfield@1380 | 533 | //non-void to non-void conversion: |
rfield@1380 | 534 | // return (TYPE)RET-EXPR; |
rfield@1380 | 535 | tree.expr = transTypes.coerce(attrEnv, tree.expr, restype); |
rfield@1380 | 536 | result = tree; |
rfield@1380 | 537 | } else { |
rfield@1380 | 538 | result = tree; |
rfield@1380 | 539 | } |
rfield@1380 | 540 | |
rfield@1380 | 541 | } |
rfield@1380 | 542 | } |
rfield@1380 | 543 | |
rfield@1380 | 544 | JCBlock trans_block = new LambdaBodyTranslator().translate(block); |
rfield@1380 | 545 | if (completeNormally && isTarget_Void) { |
rfield@1380 | 546 | //there's no return statement and the lambda (possibly inferred) |
rfield@1380 | 547 | //return type is java.lang.Void; emit a synthetic return statement |
rfield@1380 | 548 | trans_block.stats = trans_block.stats.append(make.Return(make.Literal(BOT, null).setType(syms.botType))); |
rfield@1380 | 549 | } |
rfield@1380 | 550 | return trans_block; |
rfield@1380 | 551 | } |
rfield@1380 | 552 | |
rfield@1587 | 553 | private JCMethodDecl makeDeserializeMethod(Symbol kSym) { |
alundblad@2047 | 554 | ListBuffer<JCCase> cases = new ListBuffer<>(); |
alundblad@2047 | 555 | ListBuffer<JCBreak> breaks = new ListBuffer<>(); |
rfield@1587 | 556 | for (Map.Entry<String, ListBuffer<JCStatement>> entry : kInfo.deserializeCases.entrySet()) { |
rfield@1587 | 557 | JCBreak br = make.Break(null); |
rfield@1587 | 558 | breaks.add(br); |
rfield@1587 | 559 | List<JCStatement> stmts = entry.getValue().append(br).toList(); |
rfield@1587 | 560 | cases.add(make.Case(make.Literal(entry.getKey()), stmts)); |
rfield@1587 | 561 | } |
rfield@1587 | 562 | JCSwitch sw = make.Switch(deserGetter("getImplMethodName", syms.stringType), cases.toList()); |
rfield@1587 | 563 | for (JCBreak br : breaks) { |
rfield@1587 | 564 | br.target = sw; |
rfield@1587 | 565 | } |
rfield@1587 | 566 | JCBlock body = make.Block(0L, List.<JCStatement>of( |
rfield@1587 | 567 | sw, |
rfield@1587 | 568 | make.Throw(makeNewClass( |
rfield@1587 | 569 | syms.illegalArgumentExceptionType, |
rfield@1587 | 570 | List.<JCExpression>of(make.Literal("Invalid lambda deserialization")))))); |
rfield@1587 | 571 | JCMethodDecl deser = make.MethodDef(make.Modifiers(kInfo.deserMethodSym.flags()), |
rfield@1587 | 572 | names.deserializeLambda, |
rfield@1587 | 573 | make.QualIdent(kInfo.deserMethodSym.getReturnType().tsym), |
rfield@1587 | 574 | List.<JCTypeParameter>nil(), |
rfield@1587 | 575 | List.of(make.VarDef(kInfo.deserParamSym, null)), |
rfield@1587 | 576 | List.<JCExpression>nil(), |
rfield@1587 | 577 | body, |
rfield@1587 | 578 | null); |
rfield@1587 | 579 | deser.sym = kInfo.deserMethodSym; |
rfield@1587 | 580 | deser.type = kInfo.deserMethodSym.type; |
rfield@1587 | 581 | //System.err.printf("DESER: '%s'\n", deser); |
rfield@1587 | 582 | return deser; |
rfield@1587 | 583 | } |
rfield@1587 | 584 | |
rfield@1587 | 585 | /** Make an attributed class instance creation expression. |
rfield@1587 | 586 | * @param ctype The class type. |
rfield@1587 | 587 | * @param args The constructor arguments. |
rfield@1717 | 588 | * @param cons The constructor symbol |
rfield@1587 | 589 | */ |
rfield@1717 | 590 | JCNewClass makeNewClass(Type ctype, List<JCExpression> args, Symbol cons) { |
rfield@1587 | 591 | JCNewClass tree = make.NewClass(null, |
rfield@1587 | 592 | null, make.QualIdent(ctype.tsym), args, null); |
rfield@1717 | 593 | tree.constructor = cons; |
rfield@1587 | 594 | tree.type = ctype; |
rfield@1587 | 595 | return tree; |
rfield@1587 | 596 | } |
rfield@1587 | 597 | |
rfield@1717 | 598 | /** Make an attributed class instance creation expression. |
rfield@1717 | 599 | * @param ctype The class type. |
rfield@1717 | 600 | * @param args The constructor arguments. |
rfield@1717 | 601 | */ |
rfield@1717 | 602 | JCNewClass makeNewClass(Type ctype, List<JCExpression> args) { |
rfield@1717 | 603 | return makeNewClass(ctype, args, |
rfield@1717 | 604 | rs.resolveConstructor(null, attrEnv, ctype, TreeInfo.types(args), List.<Type>nil())); |
rfield@1717 | 605 | } |
rfield@1717 | 606 | |
rfield@1587 | 607 | private void addDeserializationCase(int implMethodKind, Symbol refSym, Type targetType, MethodSymbol samSym, |
rfield@1587 | 608 | DiagnosticPosition pos, List<Object> staticArgs, MethodType indyType) { |
rfield@1587 | 609 | String functionalInterfaceClass = classSig(targetType); |
rfield@1587 | 610 | String functionalInterfaceMethodName = samSym.getSimpleName().toString(); |
rfield@2158 | 611 | String functionalInterfaceMethodSignature = typeSig(types.erasure(samSym.type)); |
rfield@1622 | 612 | String implClass = classSig(types.erasure(refSym.owner.type)); |
rfield@1587 | 613 | String implMethodName = refSym.getQualifiedName().toString(); |
rfield@2158 | 614 | String implMethodSignature = typeSig(types.erasure(refSym.type)); |
rfield@1587 | 615 | |
rfield@1587 | 616 | JCExpression kindTest = eqTest(syms.intType, deserGetter("getImplMethodKind", syms.intType), make.Literal(implMethodKind)); |
alundblad@2047 | 617 | ListBuffer<JCExpression> serArgs = new ListBuffer<>(); |
rfield@1587 | 618 | int i = 0; |
rfield@1587 | 619 | for (Type t : indyType.getParameterTypes()) { |
alundblad@2047 | 620 | List<JCExpression> indexAsArg = new ListBuffer<JCExpression>().append(make.Literal(i)).toList(); |
alundblad@2047 | 621 | List<Type> argTypes = new ListBuffer<Type>().append(syms.intType).toList(); |
rfield@1587 | 622 | serArgs.add(make.TypeCast(types.erasure(t), deserGetter("getCapturedArg", syms.objectType, argTypes, indexAsArg))); |
rfield@1587 | 623 | ++i; |
rfield@1587 | 624 | } |
rfield@1587 | 625 | JCStatement stmt = make.If( |
rfield@1587 | 626 | deserTest(deserTest(deserTest(deserTest(deserTest( |
rfield@1587 | 627 | kindTest, |
rfield@1587 | 628 | "getFunctionalInterfaceClass", functionalInterfaceClass), |
rfield@1587 | 629 | "getFunctionalInterfaceMethodName", functionalInterfaceMethodName), |
rfield@1587 | 630 | "getFunctionalInterfaceMethodSignature", functionalInterfaceMethodSignature), |
rfield@1587 | 631 | "getImplClass", implClass), |
rfield@1587 | 632 | "getImplMethodSignature", implMethodSignature), |
rfield@1587 | 633 | make.Return(makeIndyCall( |
rfield@1587 | 634 | pos, |
rfield@1587 | 635 | syms.lambdaMetafactory, |
mcimadamore@1882 | 636 | names.altMetafactory, |
mcimadamore@1882 | 637 | staticArgs, indyType, serArgs.toList(), samSym.name)), |
rfield@1587 | 638 | null); |
rfield@1587 | 639 | ListBuffer<JCStatement> stmts = kInfo.deserializeCases.get(implMethodName); |
rfield@1587 | 640 | if (stmts == null) { |
alundblad@2047 | 641 | stmts = new ListBuffer<>(); |
rfield@1587 | 642 | kInfo.deserializeCases.put(implMethodName, stmts); |
rfield@1587 | 643 | } |
rfield@1587 | 644 | /**** |
rfield@1587 | 645 | System.err.printf("+++++++++++++++++\n"); |
rfield@1587 | 646 | System.err.printf("*functionalInterfaceClass: '%s'\n", functionalInterfaceClass); |
rfield@1587 | 647 | System.err.printf("*functionalInterfaceMethodName: '%s'\n", functionalInterfaceMethodName); |
rfield@1587 | 648 | System.err.printf("*functionalInterfaceMethodSignature: '%s'\n", functionalInterfaceMethodSignature); |
rfield@1587 | 649 | System.err.printf("*implMethodKind: %d\n", implMethodKind); |
rfield@1587 | 650 | System.err.printf("*implClass: '%s'\n", implClass); |
rfield@1587 | 651 | System.err.printf("*implMethodName: '%s'\n", implMethodName); |
rfield@1587 | 652 | System.err.printf("*implMethodSignature: '%s'\n", implMethodSignature); |
rfield@1587 | 653 | ****/ |
rfield@1587 | 654 | stmts.append(stmt); |
rfield@1587 | 655 | } |
rfield@1587 | 656 | |
rfield@1587 | 657 | private JCExpression eqTest(Type argType, JCExpression arg1, JCExpression arg2) { |
rfield@1587 | 658 | JCBinary testExpr = make.Binary(JCTree.Tag.EQ, arg1, arg2); |
rfield@1587 | 659 | testExpr.operator = rs.resolveBinaryOperator(null, JCTree.Tag.EQ, attrEnv, argType, argType); |
rfield@1587 | 660 | testExpr.setType(syms.booleanType); |
rfield@1587 | 661 | return testExpr; |
rfield@1587 | 662 | } |
rfield@1587 | 663 | |
rfield@1587 | 664 | private JCExpression deserTest(JCExpression prev, String func, String lit) { |
rfield@1587 | 665 | MethodType eqmt = new MethodType(List.of(syms.objectType), syms.booleanType, List.<Type>nil(), syms.methodClass); |
rfield@1587 | 666 | Symbol eqsym = rs.resolveQualifiedMethod(null, attrEnv, syms.objectType, names.equals, List.of(syms.objectType), List.<Type>nil()); |
rfield@1587 | 667 | JCMethodInvocation eqtest = make.Apply( |
rfield@1587 | 668 | List.<JCExpression>nil(), |
rfield@1587 | 669 | make.Select(deserGetter(func, syms.stringType), eqsym).setType(eqmt), |
rfield@1587 | 670 | List.<JCExpression>of(make.Literal(lit))); |
rfield@1587 | 671 | eqtest.setType(syms.booleanType); |
rfield@1587 | 672 | JCBinary compound = make.Binary(JCTree.Tag.AND, prev, eqtest); |
rfield@1587 | 673 | compound.operator = rs.resolveBinaryOperator(null, JCTree.Tag.AND, attrEnv, syms.booleanType, syms.booleanType); |
rfield@1587 | 674 | compound.setType(syms.booleanType); |
rfield@1587 | 675 | return compound; |
rfield@1587 | 676 | } |
rfield@1587 | 677 | |
rfield@1587 | 678 | private JCExpression deserGetter(String func, Type type) { |
rfield@1587 | 679 | return deserGetter(func, type, List.<Type>nil(), List.<JCExpression>nil()); |
rfield@1587 | 680 | } |
rfield@1587 | 681 | |
rfield@1587 | 682 | private JCExpression deserGetter(String func, Type type, List<Type> argTypes, List<JCExpression> args) { |
rfield@1587 | 683 | MethodType getmt = new MethodType(argTypes, type, List.<Type>nil(), syms.methodClass); |
rfield@1587 | 684 | Symbol getsym = rs.resolveQualifiedMethod(null, attrEnv, syms.serializedLambdaType, names.fromString(func), argTypes, List.<Type>nil()); |
rfield@1587 | 685 | return make.Apply( |
rfield@1587 | 686 | List.<JCExpression>nil(), |
rfield@1587 | 687 | make.Select(make.Ident(kInfo.deserParamSym).setType(syms.serializedLambdaType), getsym).setType(getmt), |
rfield@1587 | 688 | args).setType(type); |
rfield@1587 | 689 | } |
rfield@1587 | 690 | |
rfield@1380 | 691 | /** |
rfield@1380 | 692 | * Create new synthetic method with given flags, name, type, owner |
rfield@1380 | 693 | */ |
rfield@2107 | 694 | private MethodSymbol makePrivateSyntheticMethod(long flags, Name name, Type type, Symbol owner) { |
rfield@2107 | 695 | return new MethodSymbol(flags | SYNTHETIC | PRIVATE, name, type, owner); |
rfield@1380 | 696 | } |
rfield@1380 | 697 | |
rfield@1380 | 698 | /** |
rfield@1380 | 699 | * Create new synthetic variable with given flags, name, type, owner |
rfield@1380 | 700 | */ |
rfield@1380 | 701 | private VarSymbol makeSyntheticVar(long flags, String name, Type type, Symbol owner) { |
rfield@1380 | 702 | return makeSyntheticVar(flags, names.fromString(name), type, owner); |
rfield@1380 | 703 | } |
rfield@1380 | 704 | |
rfield@1380 | 705 | /** |
rfield@1380 | 706 | * Create new synthetic variable with given flags, name, type, owner |
rfield@1380 | 707 | */ |
rfield@1380 | 708 | private VarSymbol makeSyntheticVar(long flags, Name name, Type type, Symbol owner) { |
rfield@1380 | 709 | return new VarSymbol(flags | SYNTHETIC, name, type, owner); |
rfield@1380 | 710 | } |
rfield@1380 | 711 | |
rfield@1380 | 712 | /** |
rfield@1380 | 713 | * Set varargsElement field on a given tree (must be either a new class tree |
rfield@1380 | 714 | * or a method call tree) |
rfield@1380 | 715 | */ |
rfield@1380 | 716 | private void setVarargsIfNeeded(JCTree tree, Type varargsElement) { |
rfield@1380 | 717 | if (varargsElement != null) { |
rfield@1380 | 718 | switch (tree.getTag()) { |
rfield@1380 | 719 | case APPLY: ((JCMethodInvocation)tree).varargsElement = varargsElement; break; |
rfield@1380 | 720 | case NEWCLASS: ((JCNewClass)tree).varargsElement = varargsElement; break; |
rfield@1380 | 721 | default: throw new AssertionError(); |
rfield@1380 | 722 | } |
rfield@1380 | 723 | } |
rfield@1380 | 724 | } |
rfield@1380 | 725 | |
rfield@1380 | 726 | /** |
rfield@1380 | 727 | * Convert method/constructor arguments by inserting appropriate cast |
rfield@1380 | 728 | * as required by type-erasure - this is needed when bridging a lambda/method |
rfield@1380 | 729 | * reference, as the bridged signature might require downcast to be compatible |
rfield@1380 | 730 | * with the generated signature. |
rfield@1380 | 731 | */ |
rfield@1380 | 732 | private List<JCExpression> convertArgs(Symbol meth, List<JCExpression> args, Type varargsElement) { |
rfield@1380 | 733 | Assert.check(meth.kind == Kinds.MTH); |
rfield@1380 | 734 | List<Type> formals = types.erasure(meth.type).getParameterTypes(); |
rfield@1380 | 735 | if (varargsElement != null) { |
rfield@1380 | 736 | Assert.check((meth.flags() & VARARGS) != 0); |
rfield@1380 | 737 | } |
rfield@1380 | 738 | return transTypes.translateArgs(args, formals, varargsElement, attrEnv); |
rfield@1380 | 739 | } |
rfield@1380 | 740 | |
rfield@1380 | 741 | // </editor-fold> |
rfield@1380 | 742 | |
rfield@1380 | 743 | /** |
rfield@2607 | 744 | * Converts a method reference which cannot be used directly into a lambda |
rfield@1380 | 745 | */ |
rfield@2607 | 746 | private class MemberReferenceToLambda { |
rfield@1380 | 747 | |
rfield@1380 | 748 | private final JCMemberReference tree; |
rfield@1380 | 749 | private final ReferenceTranslationContext localContext; |
rfield@2607 | 750 | private final Symbol owner; |
alundblad@2047 | 751 | private final ListBuffer<JCExpression> args = new ListBuffer<>(); |
alundblad@2047 | 752 | private final ListBuffer<JCVariableDecl> params = new ListBuffer<>(); |
rfield@1380 | 753 | |
rfield@2607 | 754 | private JCExpression receiverExpression = null; |
rfield@2607 | 755 | |
rfield@2607 | 756 | MemberReferenceToLambda(JCMemberReference tree, ReferenceTranslationContext localContext, Symbol owner) { |
rfield@1380 | 757 | this.tree = tree; |
rfield@1380 | 758 | this.localContext = localContext; |
rfield@2607 | 759 | this.owner = owner; |
rfield@1380 | 760 | } |
rfield@1380 | 761 | |
rfield@2607 | 762 | JCLambda lambda() { |
rfield@1380 | 763 | int prevPos = make.pos; |
rfield@1380 | 764 | try { |
rfield@1380 | 765 | make.at(tree); |
rfield@1380 | 766 | |
rfield@2607 | 767 | //body generation - this can be either a method call or a |
rfield@2607 | 768 | //new instance creation expression, depending on the member reference kind |
rfield@2614 | 769 | VarSymbol rcvr = addParametersReturnReceiver(); |
rfield@2607 | 770 | JCExpression expr = (tree.getMode() == ReferenceMode.INVOKE) |
rfield@2607 | 771 | ? expressionInvoke(rcvr) |
rfield@2607 | 772 | : expressionNew(); |
rfield@1380 | 773 | |
rfield@2607 | 774 | JCLambda slam = make.Lambda(params.toList(), expr); |
rfield@2607 | 775 | slam.targets = tree.targets; |
rfield@2607 | 776 | slam.type = tree.type; |
rfield@2607 | 777 | slam.pos = tree.pos; |
rfield@2607 | 778 | return slam; |
rfield@1380 | 779 | } finally { |
rfield@1380 | 780 | make.at(prevPos); |
rfield@1380 | 781 | } |
rfield@1380 | 782 | } |
rfield@2607 | 783 | |
rfield@2614 | 784 | /** |
rfield@2614 | 785 | * Generate the parameter list for the converted member reference. |
rfield@2614 | 786 | * |
rfield@2614 | 787 | * @return The receiver variable symbol, if any |
rfield@2614 | 788 | */ |
rfield@2614 | 789 | VarSymbol addParametersReturnReceiver() { |
rfield@2614 | 790 | Type samDesc = localContext.bridgedRefSig(); |
rfield@2614 | 791 | List<Type> samPTypes = samDesc.getParameterTypes(); |
rfield@2614 | 792 | List<Type> descPTypes = tree.getDescriptorType(types).getParameterTypes(); |
rfield@2614 | 793 | |
rfield@2614 | 794 | // Determine the receiver, if any |
rfield@2614 | 795 | VarSymbol rcvr; |
rfield@2614 | 796 | switch (tree.kind) { |
rfield@2614 | 797 | case BOUND: |
rfield@2614 | 798 | // The receiver is explicit in the method reference |
rfield@2614 | 799 | rcvr = addParameter("rec$", tree.getQualifierExpression().type, false); |
rfield@2614 | 800 | receiverExpression = attr.makeNullCheck(tree.getQualifierExpression()); |
rfield@2614 | 801 | break; |
rfield@2614 | 802 | case UNBOUND: |
rfield@2614 | 803 | // The receiver is the first parameter, extract it and |
rfield@2614 | 804 | // adjust the SAM and unerased type lists accordingly |
rfield@2614 | 805 | rcvr = addParameter("rec$", samDesc.getParameterTypes().head, false); |
rfield@2614 | 806 | samPTypes = samPTypes.tail; |
rfield@2614 | 807 | descPTypes = descPTypes.tail; |
rfield@2614 | 808 | break; |
rfield@2614 | 809 | default: |
rfield@2614 | 810 | rcvr = null; |
rfield@2614 | 811 | break; |
rfield@2614 | 812 | } |
rfield@2614 | 813 | List<Type> implPTypes = tree.sym.type.getParameterTypes(); |
rfield@2614 | 814 | int implSize = implPTypes.size(); |
rfield@2614 | 815 | int samSize = samPTypes.size(); |
rfield@2614 | 816 | // Last parameter to copy from referenced method, exclude final var args |
rfield@2614 | 817 | int last = localContext.needsVarArgsConversion() ? implSize - 1 : implSize; |
rfield@2614 | 818 | |
rfield@2614 | 819 | // Failsafe -- assure match-up |
rfield@2614 | 820 | boolean checkForIntersection = tree.varargsElement != null || implSize == descPTypes.size(); |
rfield@2614 | 821 | |
rfield@2614 | 822 | // Use parameter types of the implementation method unless the unerased |
rfield@2614 | 823 | // SAM parameter type is an intersection type, in that case use the |
rfield@2614 | 824 | // erased SAM parameter type so that the supertype relationship |
rfield@2614 | 825 | // the implementation method parameters is not obscured. |
rfield@2614 | 826 | // Note: in this loop, the lists implPTypes, samPTypes, and descPTypes |
rfield@2614 | 827 | // are used as pointers to the current parameter type information |
rfield@2614 | 828 | // and are thus not usable afterwards. |
rfield@2614 | 829 | for (int i = 0; implPTypes.nonEmpty() && i < last; ++i) { |
rfield@2614 | 830 | // By default use the implementation method parmeter type |
rfield@2614 | 831 | Type parmType = implPTypes.head; |
rfield@2614 | 832 | // If the unerased parameter type is a type variable whose |
rfield@2614 | 833 | // bound is an intersection (eg. <T extends A & B>) then |
rfield@2614 | 834 | // use the SAM parameter type |
rfield@2614 | 835 | if (checkForIntersection && descPTypes.head.getKind() == TypeKind.TYPEVAR) { |
rfield@2614 | 836 | TypeVar tv = (TypeVar) descPTypes.head; |
rfield@2614 | 837 | if (tv.bound.getKind() == TypeKind.INTERSECTION) { |
rfield@2614 | 838 | parmType = samPTypes.head; |
rfield@2614 | 839 | } |
rfield@2614 | 840 | } |
rfield@2614 | 841 | addParameter("x$" + i, parmType, true); |
rfield@2614 | 842 | |
rfield@2614 | 843 | // Advance to the next parameter |
rfield@2614 | 844 | implPTypes = implPTypes.tail; |
rfield@2614 | 845 | samPTypes = samPTypes.tail; |
rfield@2614 | 846 | descPTypes = descPTypes.tail; |
rfield@2614 | 847 | } |
rfield@2614 | 848 | // Flatten out the var args |
rfield@2614 | 849 | for (int i = last; i < samSize; ++i) { |
rfield@2614 | 850 | addParameter("xva$" + i, tree.varargsElement, true); |
rfield@2614 | 851 | } |
rfield@2614 | 852 | |
rfield@2614 | 853 | return rcvr; |
rfield@2614 | 854 | } |
rfield@2614 | 855 | |
rfield@2607 | 856 | JCExpression getReceiverExpression() { |
rfield@2607 | 857 | return receiverExpression; |
rfield@2607 | 858 | } |
rfield@2607 | 859 | |
rfield@2607 | 860 | private JCExpression makeReceiver(VarSymbol rcvr) { |
rfield@2607 | 861 | if (rcvr == null) return null; |
rfield@2607 | 862 | JCExpression rcvrExpr = make.Ident(rcvr); |
rfield@2607 | 863 | Type rcvrType = tree.sym.enclClass().type; |
rfield@2607 | 864 | if (rcvrType == syms.arrayClass.type) { |
rfield@2607 | 865 | // Map the receiver type to the actually type, not just "array" |
rfield@2607 | 866 | rcvrType = tree.getQualifierExpression().type; |
mcimadamore@1614 | 867 | } |
rfield@2607 | 868 | if (!rcvr.type.tsym.isSubClass(rcvrType.tsym, types)) { |
rfield@2607 | 869 | rcvrExpr = make.TypeCast(make.Type(rcvrType), rcvrExpr).setType(rcvrType); |
rfield@2607 | 870 | } |
rfield@2607 | 871 | return rcvrExpr; |
rfield@2607 | 872 | } |
rfield@1380 | 873 | |
rfield@1380 | 874 | /** |
rfield@2607 | 875 | * determine the receiver of the method call - the receiver can |
rfield@2607 | 876 | * be a type qualifier, the synthetic receiver parameter or 'super'. |
rfield@1380 | 877 | */ |
rfield@2607 | 878 | private JCExpression expressionInvoke(VarSymbol rcvr) { |
rfield@1380 | 879 | JCExpression qualifier = |
rfield@1380 | 880 | tree.sym.isStatic() ? |
rfield@1380 | 881 | make.Type(tree.sym.owner.type) : |
rfield@1380 | 882 | (rcvr != null) ? |
rfield@2607 | 883 | makeReceiver(rcvr) : |
rfield@1380 | 884 | tree.getQualifierExpression(); |
rfield@1380 | 885 | |
rfield@1380 | 886 | //create the qualifier expression |
rfield@1380 | 887 | JCFieldAccess select = make.Select(qualifier, tree.sym.name); |
rfield@1380 | 888 | select.sym = tree.sym; |
rfield@1380 | 889 | select.type = tree.sym.erasure(types); |
rfield@1380 | 890 | |
rfield@1380 | 891 | //create the method call expression |
rfield@1380 | 892 | JCExpression apply = make.Apply(List.<JCExpression>nil(), select, |
mcimadamore@1595 | 893 | convertArgs(tree.sym, args.toList(), tree.varargsElement)). |
mcimadamore@1595 | 894 | setType(tree.sym.erasure(types).getReturnType()); |
rfield@1380 | 895 | |
rfield@1380 | 896 | apply = transTypes.coerce(apply, localContext.generatedRefSig().getReturnType()); |
rfield@1380 | 897 | setVarargsIfNeeded(apply, tree.varargsElement); |
rfield@1380 | 898 | return apply; |
rfield@1380 | 899 | } |
rfield@1380 | 900 | |
rfield@1380 | 901 | /** |
rfield@2607 | 902 | * Lambda body to use for a 'new'. |
rfield@1380 | 903 | */ |
rfield@2607 | 904 | private JCExpression expressionNew() { |
mcimadamore@1496 | 905 | if (tree.kind == ReferenceKind.ARRAY_CTOR) { |
mcimadamore@1496 | 906 | //create the array creation expression |
mcimadamore@1595 | 907 | JCNewArray newArr = make.NewArray( |
mcimadamore@1595 | 908 | make.Type(types.elemtype(tree.getQualifierExpression().type)), |
mcimadamore@1496 | 909 | List.of(make.Ident(params.first())), |
mcimadamore@1496 | 910 | null); |
mcimadamore@1496 | 911 | newArr.type = tree.getQualifierExpression().type; |
mcimadamore@1496 | 912 | return newArr; |
mcimadamore@1496 | 913 | } else { |
mcimadamore@1496 | 914 | //create the instance creation expression |
rfield@2607 | 915 | //note that method reference syntax does not allow an explicit |
rfield@2607 | 916 | //enclosing class (so the enclosing class is null) |
rfield@2607 | 917 | JCNewClass newClass = make.NewClass(null, |
mcimadamore@1496 | 918 | List.<JCExpression>nil(), |
mcimadamore@1496 | 919 | make.Type(tree.getQualifierExpression().type), |
mcimadamore@1496 | 920 | convertArgs(tree.sym, args.toList(), tree.varargsElement), |
mcimadamore@1496 | 921 | null); |
mcimadamore@1496 | 922 | newClass.constructor = tree.sym; |
mcimadamore@1496 | 923 | newClass.constructorType = tree.sym.erasure(types); |
mcimadamore@1496 | 924 | newClass.type = tree.getQualifierExpression().type; |
mcimadamore@1496 | 925 | setVarargsIfNeeded(newClass, tree.varargsElement); |
mcimadamore@1496 | 926 | return newClass; |
rfield@1380 | 927 | } |
rfield@1380 | 928 | } |
rfield@1380 | 929 | |
rfield@1380 | 930 | private VarSymbol addParameter(String name, Type p, boolean genArg) { |
rfield@2607 | 931 | VarSymbol vsym = new VarSymbol(PARAMETER | SYNTHETIC, names.fromString(name), p, owner); |
rfield@2607 | 932 | vsym.pos = tree.pos; |
rfield@1380 | 933 | params.append(make.VarDef(vsym, null)); |
rfield@1380 | 934 | if (genArg) { |
rfield@1380 | 935 | args.append(make.Ident(vsym)); |
rfield@1380 | 936 | } |
rfield@1380 | 937 | return vsym; |
rfield@1380 | 938 | } |
rfield@1380 | 939 | } |
rfield@1380 | 940 | |
mcimadamore@1882 | 941 | private MethodType typeToMethodType(Type mt) { |
mcimadamore@1882 | 942 | Type type = types.erasure(mt); |
mcimadamore@1882 | 943 | return new MethodType(type.getParameterTypes(), |
mcimadamore@1882 | 944 | type.getReturnType(), |
mcimadamore@1882 | 945 | type.getThrownTypes(), |
mcimadamore@1882 | 946 | syms.methodClass); |
mcimadamore@1882 | 947 | } |
mcimadamore@1882 | 948 | |
rfield@1380 | 949 | /** |
rfield@1380 | 950 | * Generate an indy method call to the meta factory |
rfield@1380 | 951 | */ |
mcimadamore@1882 | 952 | private JCExpression makeMetafactoryIndyCall(TranslationContext<?> context, |
mcimadamore@1882 | 953 | int refKind, Symbol refSym, List<JCExpression> indy_args) { |
mcimadamore@1882 | 954 | JCFunctionalExpression tree = context.tree; |
rfield@1380 | 955 | //determine the static bsm args |
mcimadamore@1510 | 956 | MethodSymbol samSym = (MethodSymbol) types.findDescriptorSymbol(tree.type.tsym); |
rfield@1380 | 957 | List<Object> staticArgs = List.<Object>of( |
mcimadamore@1882 | 958 | typeToMethodType(samSym.type), |
vromero@1452 | 959 | new Pool.MethodHandle(refKind, refSym, types), |
mcimadamore@1882 | 960 | typeToMethodType(tree.getDescriptorType(types))); |
rfield@1380 | 961 | |
rfield@1380 | 962 | //computed indy arg types |
alundblad@2047 | 963 | ListBuffer<Type> indy_args_types = new ListBuffer<>(); |
rfield@1380 | 964 | for (JCExpression arg : indy_args) { |
rfield@1380 | 965 | indy_args_types.append(arg.type); |
rfield@1380 | 966 | } |
rfield@1380 | 967 | |
rfield@1380 | 968 | //finally, compute the type of the indy call |
rfield@1380 | 969 | MethodType indyType = new MethodType(indy_args_types.toList(), |
rfield@1380 | 970 | tree.type, |
rfield@1380 | 971 | List.<Type>nil(), |
rfield@1380 | 972 | syms.methodClass); |
rfield@1380 | 973 | |
mcimadamore@1882 | 974 | Name metafactoryName = context.needsAltMetafactory() ? |
mcimadamore@1882 | 975 | names.altMetafactory : names.metafactory; |
rfield@1587 | 976 | |
mcimadamore@1882 | 977 | if (context.needsAltMetafactory()) { |
alundblad@2047 | 978 | ListBuffer<Object> markers = new ListBuffer<>(); |
mcimadamore@1882 | 979 | for (Type t : tree.targets.tail) { |
mcimadamore@1882 | 980 | if (t.tsym != syms.serializableType.tsym) { |
mcimadamore@1882 | 981 | markers.append(t.tsym); |
rfield@1587 | 982 | } |
rfield@1587 | 983 | } |
mcimadamore@1882 | 984 | int flags = context.isSerializable() ? FLAG_SERIALIZABLE : 0; |
rfield@1587 | 985 | boolean hasMarkers = markers.nonEmpty(); |
mcimadamore@1882 | 986 | boolean hasBridges = context.bridges.nonEmpty(); |
mcimadamore@1882 | 987 | if (hasMarkers) { |
mcimadamore@1882 | 988 | flags |= FLAG_MARKERS; |
mcimadamore@1882 | 989 | } |
mcimadamore@1882 | 990 | if (hasBridges) { |
mcimadamore@1882 | 991 | flags |= FLAG_BRIDGES; |
mcimadamore@1882 | 992 | } |
rfield@1587 | 993 | staticArgs = staticArgs.append(flags); |
rfield@1587 | 994 | if (hasMarkers) { |
rfield@1587 | 995 | staticArgs = staticArgs.append(markers.length()); |
rfield@1587 | 996 | staticArgs = staticArgs.appendList(markers.toList()); |
rfield@1587 | 997 | } |
mcimadamore@1882 | 998 | if (hasBridges) { |
mcimadamore@1882 | 999 | staticArgs = staticArgs.append(context.bridges.length() - 1); |
mcimadamore@1882 | 1000 | for (Symbol s : context.bridges) { |
mcimadamore@1882 | 1001 | Type s_erasure = s.erasure(types); |
mcimadamore@1882 | 1002 | if (!types.isSameType(s_erasure, samSym.erasure(types))) { |
mcimadamore@1882 | 1003 | staticArgs = staticArgs.append(s.erasure(types)); |
mcimadamore@1882 | 1004 | } |
mcimadamore@1882 | 1005 | } |
mcimadamore@1882 | 1006 | } |
mcimadamore@1882 | 1007 | if (context.isSerializable()) { |
jlahoda@2165 | 1008 | int prevPos = make.pos; |
jlahoda@2165 | 1009 | try { |
jlahoda@2165 | 1010 | make.at(kInfo.clazz); |
jlahoda@2165 | 1011 | addDeserializationCase(refKind, refSym, tree.type, samSym, |
jlahoda@2165 | 1012 | tree, staticArgs, indyType); |
jlahoda@2165 | 1013 | } finally { |
jlahoda@2165 | 1014 | make.at(prevPos); |
jlahoda@2165 | 1015 | } |
rfield@1587 | 1016 | } |
rfield@1587 | 1017 | } |
rfield@1587 | 1018 | |
mcimadamore@1882 | 1019 | return makeIndyCall(tree, syms.lambdaMetafactory, metafactoryName, staticArgs, indyType, indy_args, samSym.name); |
rfield@1380 | 1020 | } |
rfield@1380 | 1021 | |
rfield@1380 | 1022 | /** |
rfield@1380 | 1023 | * Generate an indy method call with given name, type and static bootstrap |
rfield@1380 | 1024 | * arguments types |
rfield@1380 | 1025 | */ |
mcimadamore@1595 | 1026 | private JCExpression makeIndyCall(DiagnosticPosition pos, Type site, Name bsmName, |
mcimadamore@1882 | 1027 | List<Object> staticArgs, MethodType indyType, List<JCExpression> indyArgs, |
mcimadamore@1882 | 1028 | Name methName) { |
rfield@1380 | 1029 | int prevPos = make.pos; |
rfield@1380 | 1030 | try { |
rfield@1380 | 1031 | make.at(pos); |
rfield@1380 | 1032 | List<Type> bsm_staticArgs = List.of(syms.methodHandleLookupType, |
rfield@1380 | 1033 | syms.stringType, |
rfield@1380 | 1034 | syms.methodTypeType).appendList(bsmStaticArgToTypes(staticArgs)); |
rfield@1380 | 1035 | |
rfield@1380 | 1036 | Symbol bsm = rs.resolveInternalMethod(pos, attrEnv, site, |
rfield@1380 | 1037 | bsmName, bsm_staticArgs, List.<Type>nil()); |
rfield@1380 | 1038 | |
rfield@1380 | 1039 | DynamicMethodSymbol dynSym = |
mcimadamore@1882 | 1040 | new DynamicMethodSymbol(methName, |
rfield@1380 | 1041 | syms.noSymbol, |
mcimadamore@1595 | 1042 | bsm.isStatic() ? |
mcimadamore@1595 | 1043 | ClassFile.REF_invokeStatic : |
mcimadamore@1595 | 1044 | ClassFile.REF_invokeVirtual, |
rfield@1380 | 1045 | (MethodSymbol)bsm, |
rfield@1380 | 1046 | indyType, |
rfield@1380 | 1047 | staticArgs.toArray()); |
rfield@1380 | 1048 | |
rfield@1380 | 1049 | JCFieldAccess qualifier = make.Select(make.QualIdent(site.tsym), bsmName); |
rfield@1380 | 1050 | qualifier.sym = dynSym; |
rfield@1380 | 1051 | qualifier.type = indyType.getReturnType(); |
rfield@1380 | 1052 | |
rfield@1380 | 1053 | JCMethodInvocation proxyCall = make.Apply(List.<JCExpression>nil(), qualifier, indyArgs); |
rfield@1380 | 1054 | proxyCall.type = indyType.getReturnType(); |
rfield@1380 | 1055 | return proxyCall; |
rfield@1380 | 1056 | } finally { |
rfield@1380 | 1057 | make.at(prevPos); |
rfield@1380 | 1058 | } |
rfield@1380 | 1059 | } |
rfield@1380 | 1060 | //where |
rfield@1380 | 1061 | private List<Type> bsmStaticArgToTypes(List<Object> args) { |
alundblad@2047 | 1062 | ListBuffer<Type> argtypes = new ListBuffer<>(); |
rfield@1380 | 1063 | for (Object arg : args) { |
rfield@1380 | 1064 | argtypes.append(bsmStaticArgToType(arg)); |
rfield@1380 | 1065 | } |
rfield@1380 | 1066 | return argtypes.toList(); |
rfield@1380 | 1067 | } |
rfield@1380 | 1068 | |
rfield@1380 | 1069 | private Type bsmStaticArgToType(Object arg) { |
rfield@1380 | 1070 | Assert.checkNonNull(arg); |
rfield@1380 | 1071 | if (arg instanceof ClassSymbol) { |
rfield@1380 | 1072 | return syms.classType; |
rfield@1380 | 1073 | } else if (arg instanceof Integer) { |
rfield@1380 | 1074 | return syms.intType; |
rfield@1380 | 1075 | } else if (arg instanceof Long) { |
rfield@1380 | 1076 | return syms.longType; |
rfield@1380 | 1077 | } else if (arg instanceof Float) { |
rfield@1380 | 1078 | return syms.floatType; |
rfield@1380 | 1079 | } else if (arg instanceof Double) { |
rfield@1380 | 1080 | return syms.doubleType; |
rfield@1380 | 1081 | } else if (arg instanceof String) { |
rfield@1380 | 1082 | return syms.stringType; |
rfield@1380 | 1083 | } else if (arg instanceof Pool.MethodHandle) { |
rfield@1380 | 1084 | return syms.methodHandleType; |
rfield@1380 | 1085 | } else if (arg instanceof MethodType) { |
rfield@1380 | 1086 | return syms.methodTypeType; |
rfield@1380 | 1087 | } else { |
rfield@1380 | 1088 | Assert.error("bad static arg " + arg.getClass()); |
rfield@1380 | 1089 | return null; |
rfield@1380 | 1090 | } |
rfield@1380 | 1091 | } |
rfield@1380 | 1092 | |
rfield@1380 | 1093 | /** |
rfield@1380 | 1094 | * Get the opcode associated with this method reference |
rfield@1380 | 1095 | */ |
rfield@1380 | 1096 | private int referenceKind(Symbol refSym) { |
rfield@1380 | 1097 | if (refSym.isConstructor()) { |
rfield@1380 | 1098 | return ClassFile.REF_newInvokeSpecial; |
rfield@1380 | 1099 | } else { |
rfield@1380 | 1100 | if (refSym.isStatic()) { |
rfield@1380 | 1101 | return ClassFile.REF_invokeStatic; |
rfield@2107 | 1102 | } else if ((refSym.flags() & PRIVATE) != 0) { |
rfield@2107 | 1103 | return ClassFile.REF_invokeSpecial; |
rfield@1380 | 1104 | } else if (refSym.enclClass().isInterface()) { |
rfield@1380 | 1105 | return ClassFile.REF_invokeInterface; |
rfield@1380 | 1106 | } else { |
rfield@2107 | 1107 | return ClassFile.REF_invokeVirtual; |
rfield@1380 | 1108 | } |
rfield@1380 | 1109 | } |
rfield@1380 | 1110 | } |
rfield@1587 | 1111 | |
mcimadamore@1652 | 1112 | // <editor-fold defaultstate="collapsed" desc="Lambda/reference analyzer"> |
rfield@1380 | 1113 | /** |
rfield@1380 | 1114 | * This visitor collects information about translation of a lambda expression. |
rfield@1380 | 1115 | * More specifically, it keeps track of the enclosing contexts and captured locals |
rfield@1380 | 1116 | * accessed by the lambda being translated (as well as other useful info). |
rfield@1717 | 1117 | * It also translates away problems for LambdaToMethod. |
rfield@1380 | 1118 | */ |
rfield@1717 | 1119 | class LambdaAnalyzerPreprocessor extends TreeTranslator { |
rfield@1380 | 1120 | |
rfield@1380 | 1121 | /** the frame stack - used to reconstruct translation info about enclosing scopes */ |
rfield@1380 | 1122 | private List<Frame> frameStack; |
rfield@1380 | 1123 | |
rfield@1380 | 1124 | /** |
rfield@1380 | 1125 | * keep the count of lambda expression (used to generate unambiguous |
rfield@1380 | 1126 | * names) |
rfield@1380 | 1127 | */ |
rfield@1380 | 1128 | private int lambdaCount = 0; |
rfield@1380 | 1129 | |
rfield@1587 | 1130 | /** |
rfield@1587 | 1131 | * keep the count of lambda expression defined in given context (used to |
rfield@1587 | 1132 | * generate unambiguous names for serializable lambdas) |
rfield@1587 | 1133 | */ |
rfield@2158 | 1134 | private class SyntheticMethodNameCounter { |
rfield@2158 | 1135 | private Map<String, Integer> map = new HashMap<>(); |
rfield@2158 | 1136 | int getIndex(StringBuilder buf) { |
rfield@2158 | 1137 | String temp = buf.toString(); |
rfield@2158 | 1138 | Integer count = map.get(temp); |
rfield@2158 | 1139 | if (count == null) { |
rfield@2158 | 1140 | count = 0; |
rfield@2158 | 1141 | } |
rfield@2158 | 1142 | ++count; |
rfield@2158 | 1143 | map.put(temp, count); |
rfield@2158 | 1144 | return count; |
rfield@2158 | 1145 | } |
rfield@2158 | 1146 | } |
rfield@2158 | 1147 | private SyntheticMethodNameCounter syntheticMethodNameCounts = |
rfield@2158 | 1148 | new SyntheticMethodNameCounter(); |
rfield@1587 | 1149 | |
mcimadamore@1612 | 1150 | private Map<Symbol, JCClassDecl> localClassDefs; |
mcimadamore@1612 | 1151 | |
rfield@1587 | 1152 | /** |
rfield@1587 | 1153 | * maps for fake clinit symbols to be used as owners of lambda occurring in |
rfield@1587 | 1154 | * a static var init context |
rfield@1587 | 1155 | */ |
rfield@1587 | 1156 | private Map<ClassSymbol, Symbol> clinits = |
rfield@1587 | 1157 | new HashMap<ClassSymbol, Symbol>(); |
rfield@1587 | 1158 | |
rfield@1717 | 1159 | private JCClassDecl analyzeAndPreprocessClass(JCClassDecl tree) { |
rfield@1380 | 1160 | frameStack = List.nil(); |
mcimadamore@1612 | 1161 | localClassDefs = new HashMap<Symbol, JCClassDecl>(); |
rfield@1717 | 1162 | return translate(tree); |
rfield@1380 | 1163 | } |
rfield@1380 | 1164 | |
rfield@1380 | 1165 | @Override |
rfield@1380 | 1166 | public void visitBlock(JCBlock tree) { |
rfield@1380 | 1167 | List<Frame> prevStack = frameStack; |
rfield@1380 | 1168 | try { |
rfield@1380 | 1169 | if (frameStack.nonEmpty() && frameStack.head.tree.hasTag(CLASSDEF)) { |
rfield@1380 | 1170 | frameStack = frameStack.prepend(new Frame(tree)); |
rfield@1380 | 1171 | } |
rfield@1380 | 1172 | super.visitBlock(tree); |
rfield@1380 | 1173 | } |
rfield@1380 | 1174 | finally { |
rfield@1380 | 1175 | frameStack = prevStack; |
rfield@1380 | 1176 | } |
rfield@1380 | 1177 | } |
rfield@1380 | 1178 | |
rfield@1380 | 1179 | @Override |
rfield@1380 | 1180 | public void visitClassDef(JCClassDecl tree) { |
rfield@1380 | 1181 | List<Frame> prevStack = frameStack; |
rfield@2158 | 1182 | SyntheticMethodNameCounter prevSyntheticMethodNameCounts = |
rfield@2158 | 1183 | syntheticMethodNameCounts; |
rfield@1587 | 1184 | Map<ClassSymbol, Symbol> prevClinits = clinits; |
mcimadamore@1817 | 1185 | DiagnosticSource prevSource = log.currentSource(); |
rfield@1380 | 1186 | try { |
mcimadamore@1817 | 1187 | log.useSource(tree.sym.sourcefile); |
rfield@2158 | 1188 | syntheticMethodNameCounts = new SyntheticMethodNameCounter(); |
rfield@1587 | 1189 | prevClinits = new HashMap<ClassSymbol, Symbol>(); |
mcimadamore@1612 | 1190 | if (tree.sym.owner.kind == MTH) { |
mcimadamore@1612 | 1191 | localClassDefs.put(tree.sym, tree); |
mcimadamore@1612 | 1192 | } |
rfield@1587 | 1193 | if (directlyEnclosingLambda() != null) { |
rfield@1380 | 1194 | tree.sym.owner = owner(); |
mcimadamore@1595 | 1195 | if (tree.sym.hasOuterInstance()) { |
mcimadamore@1595 | 1196 | //if a class is defined within a lambda, the lambda must capture |
mcimadamore@1595 | 1197 | //its enclosing instance (if any) |
mcimadamore@1612 | 1198 | TranslationContext<?> localContext = context(); |
mcimadamore@1612 | 1199 | while (localContext != null) { |
mcimadamore@1612 | 1200 | if (localContext.tree.getTag() == LAMBDA) { |
mcimadamore@1612 | 1201 | ((LambdaTranslationContext)localContext) |
mcimadamore@1612 | 1202 | .addSymbol(tree.sym.type.getEnclosingType().tsym, CAPTURED_THIS); |
mcimadamore@1612 | 1203 | } |
mcimadamore@1612 | 1204 | localContext = localContext.prev; |
mcimadamore@1612 | 1205 | } |
rfield@1380 | 1206 | } |
rfield@1380 | 1207 | } |
rfield@1380 | 1208 | frameStack = frameStack.prepend(new Frame(tree)); |
rfield@1380 | 1209 | super.visitClassDef(tree); |
rfield@1380 | 1210 | } |
rfield@1380 | 1211 | finally { |
mcimadamore@1817 | 1212 | log.useSource(prevSource.getFile()); |
rfield@1380 | 1213 | frameStack = prevStack; |
rfield@2158 | 1214 | syntheticMethodNameCounts = prevSyntheticMethodNameCounts; |
rfield@1587 | 1215 | clinits = prevClinits; |
rfield@1380 | 1216 | } |
rfield@1380 | 1217 | } |
rfield@1380 | 1218 | |
rfield@1380 | 1219 | @Override |
rfield@1380 | 1220 | public void visitIdent(JCIdent tree) { |
rfield@1587 | 1221 | if (context() != null && lambdaIdentSymbolFilter(tree.sym)) { |
rfield@1380 | 1222 | if (tree.sym.kind == VAR && |
rfield@1380 | 1223 | tree.sym.owner.kind == MTH && |
rfield@1380 | 1224 | tree.type.constValue() == null) { |
rfield@1380 | 1225 | TranslationContext<?> localContext = context(); |
rfield@1380 | 1226 | while (localContext != null) { |
rfield@1380 | 1227 | if (localContext.tree.getTag() == LAMBDA) { |
rfield@1380 | 1228 | JCTree block = capturedDecl(localContext.depth, tree.sym); |
rfield@1380 | 1229 | if (block == null) break; |
mcimadamore@1595 | 1230 | ((LambdaTranslationContext)localContext) |
mcimadamore@1595 | 1231 | .addSymbol(tree.sym, CAPTURED_VAR); |
rfield@1380 | 1232 | } |
rfield@1380 | 1233 | localContext = localContext.prev; |
rfield@1380 | 1234 | } |
rfield@1380 | 1235 | } else if (tree.sym.owner.kind == TYP) { |
rfield@1380 | 1236 | TranslationContext<?> localContext = context(); |
rfield@1380 | 1237 | while (localContext != null) { |
rfield@1380 | 1238 | if (localContext.tree.hasTag(LAMBDA)) { |
rfield@1380 | 1239 | JCTree block = capturedDecl(localContext.depth, tree.sym); |
rfield@1380 | 1240 | if (block == null) break; |
rfield@1380 | 1241 | switch (block.getTag()) { |
rfield@1380 | 1242 | case CLASSDEF: |
rfield@1380 | 1243 | JCClassDecl cdecl = (JCClassDecl)block; |
mcimadamore@1595 | 1244 | ((LambdaTranslationContext)localContext) |
mcimadamore@1595 | 1245 | .addSymbol(cdecl.sym, CAPTURED_THIS); |
rfield@1380 | 1246 | break; |
rfield@1380 | 1247 | default: |
rfield@1380 | 1248 | Assert.error("bad block kind"); |
rfield@1380 | 1249 | } |
rfield@1380 | 1250 | } |
rfield@1380 | 1251 | localContext = localContext.prev; |
rfield@1380 | 1252 | } |
rfield@1380 | 1253 | } |
rfield@1380 | 1254 | } |
rfield@1587 | 1255 | super.visitIdent(tree); |
rfield@1380 | 1256 | } |
rfield@1380 | 1257 | |
rfield@1380 | 1258 | @Override |
rfield@1380 | 1259 | public void visitLambda(JCLambda tree) { |
rfield@2607 | 1260 | analyzeLambda(tree, "lambda.stat"); |
rfield@2607 | 1261 | } |
rfield@2607 | 1262 | |
rfield@2607 | 1263 | private void analyzeLambda(JCLambda tree, JCExpression methodReferenceReceiver) { |
rfield@2607 | 1264 | // Translation of the receiver expression must occur first |
rfield@2607 | 1265 | JCExpression rcvr = translate(methodReferenceReceiver); |
rfield@2607 | 1266 | LambdaTranslationContext context = analyzeLambda(tree, "mref.stat.1"); |
rfield@2607 | 1267 | if (rcvr != null) { |
rfield@2607 | 1268 | context.methodReferenceReceiver = rcvr; |
rfield@2607 | 1269 | } |
rfield@2607 | 1270 | } |
rfield@2607 | 1271 | |
rfield@2607 | 1272 | private LambdaTranslationContext analyzeLambda(JCLambda tree, String statKey) { |
rfield@1380 | 1273 | List<Frame> prevStack = frameStack; |
rfield@1380 | 1274 | try { |
rfield@2607 | 1275 | LambdaTranslationContext context = new LambdaTranslationContext(tree); |
rfield@2607 | 1276 | if (dumpLambdaToMethodStats) { |
rfield@2607 | 1277 | log.note(tree, statKey, context.needsAltMetafactory(), context.translatedSym); |
rfield@2607 | 1278 | } |
rfield@1380 | 1279 | frameStack = frameStack.prepend(new Frame(tree)); |
rfield@1380 | 1280 | for (JCVariableDecl param : tree.params) { |
rfield@1380 | 1281 | context.addSymbol(param.sym, PARAM); |
rfield@1380 | 1282 | frameStack.head.addLocal(param.sym); |
rfield@1380 | 1283 | } |
rfield@1380 | 1284 | contextMap.put(tree, context); |
rfield@1717 | 1285 | super.visitLambda(tree); |
rfield@1380 | 1286 | context.complete(); |
rfield@2607 | 1287 | return context; |
rfield@1380 | 1288 | } |
rfield@1380 | 1289 | finally { |
rfield@1380 | 1290 | frameStack = prevStack; |
rfield@1380 | 1291 | } |
rfield@1380 | 1292 | } |
rfield@1380 | 1293 | |
rfield@1380 | 1294 | @Override |
rfield@1380 | 1295 | public void visitMethodDef(JCMethodDecl tree) { |
rfield@1380 | 1296 | List<Frame> prevStack = frameStack; |
rfield@1380 | 1297 | try { |
rfield@1380 | 1298 | frameStack = frameStack.prepend(new Frame(tree)); |
rfield@1380 | 1299 | super.visitMethodDef(tree); |
rfield@1380 | 1300 | } |
rfield@1380 | 1301 | finally { |
rfield@1380 | 1302 | frameStack = prevStack; |
rfield@1380 | 1303 | } |
rfield@1380 | 1304 | } |
rfield@1380 | 1305 | |
rfield@1380 | 1306 | @Override |
rfield@1380 | 1307 | public void visitNewClass(JCNewClass tree) { |
rfield@2381 | 1308 | TypeSymbol def = tree.type.tsym; |
rfield@2381 | 1309 | boolean inReferencedClass = currentlyInClass(def); |
rfield@2381 | 1310 | boolean isLocal = def.isLocal(); |
rfield@2381 | 1311 | if ((inReferencedClass && isLocal || lambdaNewClassFilter(context(), tree))) { |
mcimadamore@1612 | 1312 | TranslationContext<?> localContext = context(); |
mcimadamore@1612 | 1313 | while (localContext != null) { |
mcimadamore@1612 | 1314 | if (localContext.tree.getTag() == LAMBDA) { |
mcimadamore@1612 | 1315 | ((LambdaTranslationContext)localContext) |
mcimadamore@1612 | 1316 | .addSymbol(tree.type.getEnclosingType().tsym, CAPTURED_THIS); |
mcimadamore@1612 | 1317 | } |
mcimadamore@1612 | 1318 | localContext = localContext.prev; |
mcimadamore@1612 | 1319 | } |
mcimadamore@1612 | 1320 | } |
rfield@2381 | 1321 | if (context() != null && !inReferencedClass && isLocal) { |
mcimadamore@1612 | 1322 | LambdaTranslationContext lambdaContext = (LambdaTranslationContext)context(); |
rfield@2381 | 1323 | captureLocalClassDefs(def, lambdaContext); |
rfield@1380 | 1324 | } |
rfield@1380 | 1325 | super.visitNewClass(tree); |
rfield@1380 | 1326 | } |
mcimadamore@1612 | 1327 | //where |
mcimadamore@1612 | 1328 | void captureLocalClassDefs(Symbol csym, final LambdaTranslationContext lambdaContext) { |
mcimadamore@1612 | 1329 | JCClassDecl localCDef = localClassDefs.get(csym); |
rfield@2381 | 1330 | if (localCDef != null && lambdaContext.freeVarProcessedLocalClasses.add(csym)) { |
mcimadamore@1612 | 1331 | BasicFreeVarCollector fvc = lower.new BasicFreeVarCollector() { |
mcimadamore@1612 | 1332 | @Override |
mcimadamore@1612 | 1333 | void addFreeVars(ClassSymbol c) { |
mcimadamore@1612 | 1334 | captureLocalClassDefs(c, lambdaContext); |
mcimadamore@1612 | 1335 | } |
mcimadamore@1612 | 1336 | @Override |
mcimadamore@1612 | 1337 | void visitSymbol(Symbol sym) { |
mcimadamore@1612 | 1338 | if (sym.kind == VAR && |
mcimadamore@1612 | 1339 | sym.owner.kind == MTH && |
mcimadamore@1612 | 1340 | ((VarSymbol)sym).getConstValue() == null) { |
mcimadamore@1612 | 1341 | TranslationContext<?> localContext = context(); |
mcimadamore@1612 | 1342 | while (localContext != null) { |
mcimadamore@1612 | 1343 | if (localContext.tree.getTag() == LAMBDA) { |
mcimadamore@1612 | 1344 | JCTree block = capturedDecl(localContext.depth, sym); |
mcimadamore@1612 | 1345 | if (block == null) break; |
mcimadamore@1612 | 1346 | ((LambdaTranslationContext)localContext).addSymbol(sym, CAPTURED_VAR); |
mcimadamore@1612 | 1347 | } |
mcimadamore@1612 | 1348 | localContext = localContext.prev; |
mcimadamore@1612 | 1349 | } |
mcimadamore@1612 | 1350 | } |
mcimadamore@1612 | 1351 | } |
mcimadamore@1612 | 1352 | }; |
mcimadamore@1612 | 1353 | fvc.scan(localCDef); |
mcimadamore@1612 | 1354 | } |
rfield@1717 | 1355 | } |
rfield@2381 | 1356 | //where |
rfield@2381 | 1357 | boolean currentlyInClass(Symbol csym) { |
rfield@2381 | 1358 | for (Frame frame : frameStack) { |
rfield@2381 | 1359 | if (frame.tree.hasTag(JCTree.Tag.CLASSDEF)) { |
rfield@2381 | 1360 | JCClassDecl cdef = (JCClassDecl) frame.tree; |
rfield@2381 | 1361 | if (cdef.sym == csym) { |
rfield@2381 | 1362 | return true; |
rfield@2381 | 1363 | } |
rfield@2381 | 1364 | } |
rfield@2381 | 1365 | } |
rfield@2381 | 1366 | return false; |
rfield@2381 | 1367 | } |
rfield@1380 | 1368 | |
rfield@1717 | 1369 | /** |
rfield@1717 | 1370 | * Method references to local class constructors, may, if the local |
rfield@1717 | 1371 | * class references local variables, have implicit constructor |
rfield@1717 | 1372 | * parameters added in Lower; As a result, the invokedynamic bootstrap |
rfield@1717 | 1373 | * information added in the LambdaToMethod pass will have the wrong |
rfield@1717 | 1374 | * signature. Hooks between Lower and LambdaToMethod have been added to |
rfield@1717 | 1375 | * handle normal "new" in this case. This visitor converts potentially |
rfield@2607 | 1376 | * affected method references into a lambda containing a normal |
rfield@2607 | 1377 | * expression. |
rfield@1717 | 1378 | * |
rfield@1717 | 1379 | * @param tree |
rfield@1717 | 1380 | */ |
rfield@1380 | 1381 | @Override |
rfield@1380 | 1382 | public void visitReference(JCMemberReference tree) { |
rfield@2607 | 1383 | ReferenceTranslationContext rcontext = new ReferenceTranslationContext(tree); |
rfield@2607 | 1384 | contextMap.put(tree, rcontext); |
rfield@2607 | 1385 | if (rcontext.needsConversionToLambda()) { |
rfield@2607 | 1386 | // Convert to a lambda, and process as such |
rfield@2607 | 1387 | MemberReferenceToLambda conv = new MemberReferenceToLambda(tree, rcontext, owner()); |
rfield@2607 | 1388 | analyzeLambda(conv.lambda(), conv.getReceiverExpression()); |
rfield@1717 | 1389 | } else { |
rfield@1717 | 1390 | super.visitReference(tree); |
rfield@2607 | 1391 | if (dumpLambdaToMethodStats) { |
rfield@2607 | 1392 | log.note(tree, "mref.stat", rcontext.needsAltMetafactory(), null); |
rfield@2607 | 1393 | } |
rfield@1717 | 1394 | } |
rfield@1380 | 1395 | } |
rfield@1380 | 1396 | |
rfield@1380 | 1397 | @Override |
rfield@1380 | 1398 | public void visitSelect(JCFieldAccess tree) { |
rfield@1762 | 1399 | if (context() != null && tree.sym.kind == VAR && |
rfield@1762 | 1400 | (tree.sym.name == names._this || |
rfield@1762 | 1401 | tree.sym.name == names._super)) { |
rfield@1762 | 1402 | // A select of this or super means, if we are in a lambda, |
rfield@1762 | 1403 | // we much have an instance context |
rfield@1380 | 1404 | TranslationContext<?> localContext = context(); |
rfield@1380 | 1405 | while (localContext != null) { |
rfield@1380 | 1406 | if (localContext.tree.hasTag(LAMBDA)) { |
rfield@1380 | 1407 | JCClassDecl clazz = (JCClassDecl)capturedDecl(localContext.depth, tree.sym); |
rfield@1380 | 1408 | if (clazz == null) break; |
rfield@1380 | 1409 | ((LambdaTranslationContext)localContext).addSymbol(clazz.sym, CAPTURED_THIS); |
rfield@1380 | 1410 | } |
rfield@1380 | 1411 | localContext = localContext.prev; |
rfield@1380 | 1412 | } |
rfield@1380 | 1413 | } |
rfield@1717 | 1414 | super.visitSelect(tree); |
rfield@1380 | 1415 | } |
rfield@1380 | 1416 | |
rfield@1380 | 1417 | @Override |
rfield@1380 | 1418 | public void visitVarDef(JCVariableDecl tree) { |
rfield@1587 | 1419 | TranslationContext<?> context = context(); |
rfield@1587 | 1420 | LambdaTranslationContext ltc = (context != null && context instanceof LambdaTranslationContext)? |
rfield@1587 | 1421 | (LambdaTranslationContext)context : |
rfield@1587 | 1422 | null; |
rfield@1587 | 1423 | if (ltc != null) { |
rfield@1587 | 1424 | if (frameStack.head.tree.hasTag(LAMBDA)) { |
rfield@1587 | 1425 | ltc.addSymbol(tree.sym, LOCAL_VAR); |
rfield@1587 | 1426 | } |
rfield@1587 | 1427 | // Check for type variables (including as type arguments). |
rfield@1587 | 1428 | // If they occur within class nested in a lambda, mark for erasure |
rfield@1587 | 1429 | Type type = tree.sym.asType(); |
rfield@1587 | 1430 | if (inClassWithinLambda() && !types.isSameType(types.erasure(type), type)) { |
rfield@1587 | 1431 | ltc.addSymbol(tree.sym, TYPE_VAR); |
rfield@1587 | 1432 | } |
rfield@1380 | 1433 | } |
rfield@1587 | 1434 | |
rfield@1380 | 1435 | List<Frame> prevStack = frameStack; |
rfield@1380 | 1436 | try { |
rfield@1380 | 1437 | if (tree.sym.owner.kind == MTH) { |
rfield@1380 | 1438 | frameStack.head.addLocal(tree.sym); |
rfield@1380 | 1439 | } |
rfield@1380 | 1440 | frameStack = frameStack.prepend(new Frame(tree)); |
rfield@1380 | 1441 | super.visitVarDef(tree); |
rfield@1380 | 1442 | } |
rfield@1380 | 1443 | finally { |
rfield@1380 | 1444 | frameStack = prevStack; |
rfield@1380 | 1445 | } |
rfield@1380 | 1446 | } |
rfield@1380 | 1447 | |
rfield@1380 | 1448 | /** |
rfield@1380 | 1449 | * Return a valid owner given the current declaration stack |
rfield@1380 | 1450 | * (required to skip synthetic lambda symbols) |
rfield@1380 | 1451 | */ |
rfield@1380 | 1452 | private Symbol owner() { |
mcimadamore@1515 | 1453 | return owner(false); |
mcimadamore@1515 | 1454 | } |
mcimadamore@1515 | 1455 | |
mcimadamore@1515 | 1456 | @SuppressWarnings("fallthrough") |
mcimadamore@1515 | 1457 | private Symbol owner(boolean skipLambda) { |
rfield@1380 | 1458 | List<Frame> frameStack2 = frameStack; |
rfield@1380 | 1459 | while (frameStack2.nonEmpty()) { |
rfield@1380 | 1460 | switch (frameStack2.head.tree.getTag()) { |
rfield@1380 | 1461 | case VARDEF: |
rfield@1380 | 1462 | if (((JCVariableDecl)frameStack2.head.tree).sym.isLocal()) { |
rfield@1380 | 1463 | frameStack2 = frameStack2.tail; |
rfield@1380 | 1464 | break; |
rfield@1380 | 1465 | } |
rfield@1380 | 1466 | JCClassDecl cdecl = (JCClassDecl)frameStack2.tail.head.tree; |
rfield@1587 | 1467 | return initSym(cdecl.sym, |
rfield@1587 | 1468 | ((JCVariableDecl)frameStack2.head.tree).sym.flags() & STATIC); |
rfield@1380 | 1469 | case BLOCK: |
rfield@1380 | 1470 | JCClassDecl cdecl2 = (JCClassDecl)frameStack2.tail.head.tree; |
rfield@1587 | 1471 | return initSym(cdecl2.sym, |
rfield@1587 | 1472 | ((JCBlock)frameStack2.head.tree).flags & STATIC); |
rfield@1380 | 1473 | case CLASSDEF: |
rfield@1380 | 1474 | return ((JCClassDecl)frameStack2.head.tree).sym; |
rfield@1380 | 1475 | case METHODDEF: |
rfield@1380 | 1476 | return ((JCMethodDecl)frameStack2.head.tree).sym; |
rfield@1380 | 1477 | case LAMBDA: |
mcimadamore@1515 | 1478 | if (!skipLambda) |
mcimadamore@1595 | 1479 | return ((LambdaTranslationContext)contextMap |
mcimadamore@1595 | 1480 | .get(frameStack2.head.tree)).translatedSym; |
rfield@1380 | 1481 | default: |
rfield@1380 | 1482 | frameStack2 = frameStack2.tail; |
rfield@1380 | 1483 | } |
rfield@1380 | 1484 | } |
rfield@1380 | 1485 | Assert.error(); |
rfield@1380 | 1486 | return null; |
rfield@1380 | 1487 | } |
rfield@1380 | 1488 | |
rfield@1587 | 1489 | private Symbol initSym(ClassSymbol csym, long flags) { |
rfield@1587 | 1490 | boolean isStatic = (flags & STATIC) != 0; |
rfield@1587 | 1491 | if (isStatic) { |
vromero@2222 | 1492 | /* static clinits are generated in Gen, so we need to use a fake |
vromero@2222 | 1493 | * one. Attr creates a fake clinit method while attributing |
vromero@2222 | 1494 | * lambda expressions used as initializers of static fields, so |
vromero@2222 | 1495 | * let's use that one. |
vromero@2222 | 1496 | */ |
vromero@2222 | 1497 | MethodSymbol clinit = attr.removeClinit(csym); |
vromero@2222 | 1498 | if (clinit != null) { |
vromero@2222 | 1499 | clinits.put(csym, clinit); |
vromero@2222 | 1500 | return clinit; |
vromero@2222 | 1501 | } |
vromero@2222 | 1502 | |
vromero@2222 | 1503 | /* if no clinit is found at Attr, then let's try at clinits. |
vromero@2222 | 1504 | */ |
vromero@2222 | 1505 | clinit = (MethodSymbol)clinits.get(csym); |
rfield@1587 | 1506 | if (clinit == null) { |
vromero@2222 | 1507 | /* no luck, let's create a new one |
vromero@2222 | 1508 | */ |
rfield@2107 | 1509 | clinit = makePrivateSyntheticMethod(STATIC, |
rfield@1587 | 1510 | names.clinit, |
vromero@2222 | 1511 | new MethodType(List.<Type>nil(), syms.voidType, |
vromero@2222 | 1512 | List.<Type>nil(), syms.methodClass), |
rfield@1587 | 1513 | csym); |
rfield@1587 | 1514 | clinits.put(csym, clinit); |
rfield@1587 | 1515 | } |
rfield@1587 | 1516 | return clinit; |
rfield@1587 | 1517 | } else { |
rfield@1587 | 1518 | //get the first constructor and treat it as the instance init sym |
rfield@1587 | 1519 | for (Symbol s : csym.members_field.getElementsByName(names.init)) { |
rfield@1587 | 1520 | return s; |
rfield@1587 | 1521 | } |
rfield@1587 | 1522 | } |
rfield@1587 | 1523 | Assert.error("init not found"); |
rfield@1587 | 1524 | return null; |
rfield@1587 | 1525 | } |
rfield@1587 | 1526 | |
rfield@1587 | 1527 | private JCTree directlyEnclosingLambda() { |
rfield@1587 | 1528 | if (frameStack.isEmpty()) { |
rfield@1587 | 1529 | return null; |
rfield@1587 | 1530 | } |
rfield@1380 | 1531 | List<Frame> frameStack2 = frameStack; |
rfield@1380 | 1532 | while (frameStack2.nonEmpty()) { |
rfield@1380 | 1533 | switch (frameStack2.head.tree.getTag()) { |
rfield@1380 | 1534 | case CLASSDEF: |
rfield@1380 | 1535 | case METHODDEF: |
rfield@1380 | 1536 | return null; |
rfield@1380 | 1537 | case LAMBDA: |
rfield@1380 | 1538 | return frameStack2.head.tree; |
rfield@1380 | 1539 | default: |
rfield@1380 | 1540 | frameStack2 = frameStack2.tail; |
rfield@1380 | 1541 | } |
rfield@1380 | 1542 | } |
rfield@1380 | 1543 | Assert.error(); |
rfield@1380 | 1544 | return null; |
rfield@1380 | 1545 | } |
rfield@1380 | 1546 | |
rfield@1587 | 1547 | private boolean inClassWithinLambda() { |
rfield@1587 | 1548 | if (frameStack.isEmpty()) { |
rfield@1587 | 1549 | return false; |
rfield@1587 | 1550 | } |
rfield@1587 | 1551 | List<Frame> frameStack2 = frameStack; |
rfield@1587 | 1552 | boolean classFound = false; |
rfield@1587 | 1553 | while (frameStack2.nonEmpty()) { |
rfield@1587 | 1554 | switch (frameStack2.head.tree.getTag()) { |
rfield@1587 | 1555 | case LAMBDA: |
rfield@1587 | 1556 | return classFound; |
rfield@1587 | 1557 | case CLASSDEF: |
rfield@1587 | 1558 | classFound = true; |
rfield@1587 | 1559 | frameStack2 = frameStack2.tail; |
rfield@1587 | 1560 | break; |
rfield@1587 | 1561 | default: |
rfield@1587 | 1562 | frameStack2 = frameStack2.tail; |
rfield@1587 | 1563 | } |
rfield@1587 | 1564 | } |
rfield@1587 | 1565 | // No lambda |
rfield@1587 | 1566 | return false; |
rfield@1587 | 1567 | } |
rfield@1587 | 1568 | |
rfield@1380 | 1569 | /** |
rfield@1380 | 1570 | * Return the declaration corresponding to a symbol in the enclosing |
rfield@1380 | 1571 | * scope; the depth parameter is used to filter out symbols defined |
rfield@1380 | 1572 | * in nested scopes (which do not need to undergo capture). |
rfield@1380 | 1573 | */ |
rfield@1380 | 1574 | private JCTree capturedDecl(int depth, Symbol sym) { |
rfield@1380 | 1575 | int currentDepth = frameStack.size() - 1; |
rfield@1380 | 1576 | for (Frame block : frameStack) { |
rfield@1380 | 1577 | switch (block.tree.getTag()) { |
rfield@1380 | 1578 | case CLASSDEF: |
rfield@1380 | 1579 | ClassSymbol clazz = ((JCClassDecl)block.tree).sym; |
rfield@1380 | 1580 | if (sym.isMemberOf(clazz, types)) { |
rfield@1380 | 1581 | return currentDepth > depth ? null : block.tree; |
rfield@1380 | 1582 | } |
rfield@1380 | 1583 | break; |
rfield@1380 | 1584 | case VARDEF: |
rfield@1380 | 1585 | if (((JCVariableDecl)block.tree).sym == sym && |
rfield@1380 | 1586 | sym.owner.kind == MTH) { //only locals are captured |
rfield@1380 | 1587 | return currentDepth > depth ? null : block.tree; |
rfield@1380 | 1588 | } |
rfield@1380 | 1589 | break; |
rfield@1380 | 1590 | case BLOCK: |
rfield@1380 | 1591 | case METHODDEF: |
rfield@1380 | 1592 | case LAMBDA: |
rfield@1380 | 1593 | if (block.locals != null && block.locals.contains(sym)) { |
rfield@1380 | 1594 | return currentDepth > depth ? null : block.tree; |
rfield@1380 | 1595 | } |
rfield@1380 | 1596 | break; |
rfield@1380 | 1597 | default: |
rfield@1380 | 1598 | Assert.error("bad decl kind " + block.tree.getTag()); |
rfield@1380 | 1599 | } |
rfield@1380 | 1600 | currentDepth--; |
rfield@1380 | 1601 | } |
rfield@1380 | 1602 | return null; |
rfield@1380 | 1603 | } |
rfield@1380 | 1604 | |
rfield@1380 | 1605 | private TranslationContext<?> context() { |
rfield@1380 | 1606 | for (Frame frame : frameStack) { |
rfield@1380 | 1607 | TranslationContext<?> context = contextMap.get(frame.tree); |
rfield@1380 | 1608 | if (context != null) { |
rfield@1380 | 1609 | return context; |
rfield@1380 | 1610 | } |
rfield@1380 | 1611 | } |
rfield@1380 | 1612 | return null; |
rfield@1380 | 1613 | } |
rfield@1380 | 1614 | |
rfield@1380 | 1615 | /** |
rfield@1380 | 1616 | * This is used to filter out those identifiers that needs to be adjusted |
rfield@1380 | 1617 | * when translating away lambda expressions |
rfield@1380 | 1618 | */ |
rfield@1380 | 1619 | private boolean lambdaIdentSymbolFilter(Symbol sym) { |
rfield@1380 | 1620 | return (sym.kind == VAR || sym.kind == MTH) |
rfield@1380 | 1621 | && !sym.isStatic() |
rfield@1380 | 1622 | && sym.name != names.init; |
rfield@1380 | 1623 | } |
rfield@1380 | 1624 | |
rfield@1380 | 1625 | /** |
rfield@1380 | 1626 | * This is used to filter out those new class expressions that need to |
rfield@1380 | 1627 | * be qualified with an enclosing tree |
rfield@1380 | 1628 | */ |
rfield@1380 | 1629 | private boolean lambdaNewClassFilter(TranslationContext<?> context, JCNewClass tree) { |
rfield@1380 | 1630 | if (context != null |
rfield@1380 | 1631 | && tree.encl == null |
rfield@1380 | 1632 | && tree.def == null |
rfield@1405 | 1633 | && !tree.type.getEnclosingType().hasTag(NONE)) { |
rfield@1380 | 1634 | Type encl = tree.type.getEnclosingType(); |
rfield@1380 | 1635 | Type current = context.owner.enclClass().type; |
rfield@1405 | 1636 | while (!current.hasTag(NONE)) { |
rfield@1380 | 1637 | if (current.tsym.isSubClass(encl.tsym, types)) { |
rfield@1380 | 1638 | return true; |
rfield@1380 | 1639 | } |
rfield@1380 | 1640 | current = current.getEnclosingType(); |
rfield@1380 | 1641 | } |
rfield@1380 | 1642 | return false; |
rfield@1380 | 1643 | } else { |
rfield@1380 | 1644 | return false; |
rfield@1380 | 1645 | } |
rfield@1380 | 1646 | } |
rfield@1380 | 1647 | |
rfield@1380 | 1648 | private class Frame { |
rfield@1380 | 1649 | final JCTree tree; |
rfield@1380 | 1650 | List<Symbol> locals; |
rfield@1380 | 1651 | |
rfield@1380 | 1652 | public Frame(JCTree tree) { |
rfield@1380 | 1653 | this.tree = tree; |
rfield@1380 | 1654 | } |
rfield@1380 | 1655 | |
rfield@1380 | 1656 | void addLocal(Symbol sym) { |
rfield@1380 | 1657 | if (locals == null) { |
rfield@1380 | 1658 | locals = List.nil(); |
rfield@1380 | 1659 | } |
rfield@1380 | 1660 | locals = locals.prepend(sym); |
rfield@1380 | 1661 | } |
rfield@1380 | 1662 | } |
rfield@1380 | 1663 | |
rfield@1380 | 1664 | /** |
rfield@1380 | 1665 | * This class is used to store important information regarding translation of |
rfield@1380 | 1666 | * lambda expression/method references (see subclasses). |
rfield@1380 | 1667 | */ |
mcimadamore@1510 | 1668 | private abstract class TranslationContext<T extends JCFunctionalExpression> { |
rfield@1380 | 1669 | |
rfield@1380 | 1670 | /** the underlying (untranslated) tree */ |
rfield@2158 | 1671 | final T tree; |
rfield@1380 | 1672 | |
rfield@1380 | 1673 | /** points to the adjusted enclosing scope in which this lambda/mref expression occurs */ |
rfield@2158 | 1674 | final Symbol owner; |
rfield@1380 | 1675 | |
rfield@1380 | 1676 | /** the depth of this lambda expression in the frame stack */ |
rfield@2158 | 1677 | final int depth; |
rfield@1380 | 1678 | |
rfield@1380 | 1679 | /** the enclosing translation context (set for nested lambdas/mref) */ |
rfield@2158 | 1680 | final TranslationContext<?> prev; |
rfield@1380 | 1681 | |
mcimadamore@1882 | 1682 | /** list of methods to be bridged by the meta-factory */ |
rfield@2158 | 1683 | final List<Symbol> bridges; |
mcimadamore@1882 | 1684 | |
rfield@1380 | 1685 | TranslationContext(T tree) { |
rfield@1380 | 1686 | this.tree = tree; |
rfield@1380 | 1687 | this.owner = owner(); |
rfield@1380 | 1688 | this.depth = frameStack.size() - 1; |
rfield@1380 | 1689 | this.prev = context(); |
mcimadamore@1882 | 1690 | ClassSymbol csym = |
mcimadamore@1882 | 1691 | types.makeFunctionalInterfaceClass(attrEnv, names.empty, tree.targets, ABSTRACT | INTERFACE); |
mcimadamore@1882 | 1692 | this.bridges = types.functionalInterfaceBridges(csym); |
rfield@1380 | 1693 | } |
rfield@1587 | 1694 | |
rfield@1587 | 1695 | /** does this functional expression need to be created using alternate metafactory? */ |
rfield@1587 | 1696 | boolean needsAltMetafactory() { |
mcimadamore@1882 | 1697 | return tree.targets.length() > 1 || |
mcimadamore@1882 | 1698 | isSerializable() || |
mcimadamore@1882 | 1699 | bridges.length() > 1; |
rfield@1587 | 1700 | } |
rfield@1587 | 1701 | |
rfield@1587 | 1702 | /** does this functional expression require serialization support? */ |
rfield@1587 | 1703 | boolean isSerializable() { |
ksrini@2251 | 1704 | if (forceSerializable) { |
ksrini@2251 | 1705 | return true; |
ksrini@2251 | 1706 | } |
mcimadamore@1882 | 1707 | for (Type target : tree.targets) { |
mcimadamore@1882 | 1708 | if (types.asSuper(target, syms.serializableType.tsym) != null) { |
rfield@1587 | 1709 | return true; |
rfield@1587 | 1710 | } |
rfield@1587 | 1711 | } |
rfield@1587 | 1712 | return false; |
rfield@1587 | 1713 | } |
rfield@2158 | 1714 | |
rfield@2158 | 1715 | /** |
rfield@2158 | 1716 | * @return Name of the enclosing method to be folded into synthetic |
rfield@2158 | 1717 | * method name |
rfield@2158 | 1718 | */ |
rfield@2158 | 1719 | String enclosingMethodName() { |
rfield@2158 | 1720 | return syntheticMethodNameComponent(owner.name); |
rfield@2158 | 1721 | } |
rfield@2158 | 1722 | |
rfield@2158 | 1723 | /** |
rfield@2158 | 1724 | * @return Method name in a form that can be folded into a |
rfield@2158 | 1725 | * component of a synthetic method name |
rfield@2158 | 1726 | */ |
rfield@2158 | 1727 | String syntheticMethodNameComponent(Name name) { |
rfield@2158 | 1728 | if (name == null) { |
rfield@2158 | 1729 | return "null"; |
rfield@2158 | 1730 | } |
rfield@2158 | 1731 | String methodName = name.toString(); |
rfield@2158 | 1732 | if (methodName.equals("<clinit>")) { |
rfield@2158 | 1733 | methodName = "static"; |
rfield@2158 | 1734 | } else if (methodName.equals("<init>")) { |
rfield@2158 | 1735 | methodName = "new"; |
rfield@2158 | 1736 | } |
rfield@2158 | 1737 | return methodName; |
rfield@2158 | 1738 | } |
rfield@1380 | 1739 | } |
rfield@1380 | 1740 | |
rfield@1380 | 1741 | /** |
rfield@1380 | 1742 | * This class retains all the useful information about a lambda expression; |
rfield@1380 | 1743 | * the contents of this class are filled by the LambdaAnalyzer visitor, |
rfield@1380 | 1744 | * and the used by the main translation routines in order to adjust references |
rfield@1380 | 1745 | * to captured locals/members, etc. |
rfield@1380 | 1746 | */ |
rfield@1380 | 1747 | private class LambdaTranslationContext extends TranslationContext<JCLambda> { |
rfield@1380 | 1748 | |
rfield@1380 | 1749 | /** variable in the enclosing context to which this lambda is assigned */ |
rfield@2158 | 1750 | final Symbol self; |
rfield@2158 | 1751 | |
rfield@2158 | 1752 | /** variable in the enclosing context to which this lambda is assigned */ |
rfield@2158 | 1753 | final Symbol assignedTo; |
rfield@1380 | 1754 | |
ksrini@2155 | 1755 | Map<LambdaSymbolKind, Map<Symbol, Symbol>> translatedSymbols; |
rfield@1587 | 1756 | |
rfield@1380 | 1757 | /** the synthetic symbol for the method hoisting the translated lambda */ |
rfield@1380 | 1758 | Symbol translatedSym; |
rfield@1380 | 1759 | |
rfield@1380 | 1760 | List<JCVariableDecl> syntheticParams; |
rfield@1380 | 1761 | |
rfield@2381 | 1762 | /** |
rfield@2381 | 1763 | * to prevent recursion, track local classes processed |
rfield@2381 | 1764 | */ |
rfield@2381 | 1765 | final Set<Symbol> freeVarProcessedLocalClasses; |
rfield@2381 | 1766 | |
rfield@2607 | 1767 | /** |
rfield@2607 | 1768 | * For method references converted to lambdas. The method |
rfield@2607 | 1769 | * reference receiver expression. Must be treated like a captured |
rfield@2607 | 1770 | * variable. |
rfield@2607 | 1771 | */ |
rfield@2607 | 1772 | JCExpression methodReferenceReceiver; |
rfield@2607 | 1773 | |
rfield@1380 | 1774 | LambdaTranslationContext(JCLambda tree) { |
rfield@1380 | 1775 | super(tree); |
rfield@1380 | 1776 | Frame frame = frameStack.head; |
rfield@2158 | 1777 | switch (frame.tree.getTag()) { |
rfield@2158 | 1778 | case VARDEF: |
rfield@2158 | 1779 | assignedTo = self = ((JCVariableDecl) frame.tree).sym; |
rfield@2158 | 1780 | break; |
rfield@2158 | 1781 | case ASSIGN: |
rfield@2158 | 1782 | self = null; |
rfield@2158 | 1783 | assignedTo = TreeInfo.symbol(((JCAssign) frame.tree).getVariable()); |
rfield@2158 | 1784 | break; |
rfield@2158 | 1785 | default: |
rfield@2158 | 1786 | assignedTo = self = null; |
rfield@2158 | 1787 | break; |
rfield@2158 | 1788 | } |
rfield@2158 | 1789 | |
rfield@2158 | 1790 | // This symbol will be filled-in in complete |
rfield@2158 | 1791 | this.translatedSym = makePrivateSyntheticMethod(0, null, null, owner.enclClass()); |
rfield@2158 | 1792 | |
ksrini@2155 | 1793 | translatedSymbols = new EnumMap<>(LambdaSymbolKind.class); |
ksrini@2155 | 1794 | |
ksrini@2155 | 1795 | translatedSymbols.put(PARAM, new LinkedHashMap<Symbol, Symbol>()); |
ksrini@2155 | 1796 | translatedSymbols.put(LOCAL_VAR, new LinkedHashMap<Symbol, Symbol>()); |
ksrini@2155 | 1797 | translatedSymbols.put(CAPTURED_VAR, new LinkedHashMap<Symbol, Symbol>()); |
ksrini@2155 | 1798 | translatedSymbols.put(CAPTURED_THIS, new LinkedHashMap<Symbol, Symbol>()); |
ksrini@2155 | 1799 | translatedSymbols.put(TYPE_VAR, new LinkedHashMap<Symbol, Symbol>()); |
rfield@2381 | 1800 | |
rfield@2381 | 1801 | freeVarProcessedLocalClasses = new HashSet<>(); |
rfield@1380 | 1802 | } |
rfield@1380 | 1803 | |
rfield@2158 | 1804 | /** |
rfield@2158 | 1805 | * For a serializable lambda, generate a disambiguating string |
rfield@2158 | 1806 | * which maximizes stability across deserialization. |
rfield@2158 | 1807 | * |
rfield@2158 | 1808 | * @return String to differentiate synthetic lambda method names |
rfield@2158 | 1809 | */ |
rfield@2158 | 1810 | private String serializedLambdaDisambiguation() { |
rfield@2158 | 1811 | StringBuilder buf = new StringBuilder(); |
rfield@2158 | 1812 | // Append the enclosing method signature to differentiate |
rfield@2158 | 1813 | // overloaded enclosing methods. For lambdas enclosed in |
rfield@2158 | 1814 | // lambdas, the generated lambda method will not have type yet, |
rfield@2158 | 1815 | // but the enclosing method's name will have been generated |
rfield@2158 | 1816 | // with this same method, so it will be unique and never be |
rfield@2158 | 1817 | // overloaded. |
rfield@2158 | 1818 | Assert.check( |
rfield@2158 | 1819 | owner.type != null || |
rfield@2158 | 1820 | directlyEnclosingLambda() != null); |
rfield@2158 | 1821 | if (owner.type != null) { |
rfield@2158 | 1822 | buf.append(typeSig(owner.type)); |
rfield@2158 | 1823 | buf.append(":"); |
rfield@2158 | 1824 | } |
rfield@2158 | 1825 | |
rfield@2158 | 1826 | // Add target type info |
rfield@2158 | 1827 | buf.append(types.findDescriptorSymbol(tree.type.tsym).owner.flatName()); |
rfield@2158 | 1828 | buf.append(" "); |
rfield@2158 | 1829 | |
rfield@2158 | 1830 | // Add variable assigned to |
rfield@2158 | 1831 | if (assignedTo != null) { |
rfield@2158 | 1832 | buf.append(assignedTo.flatName()); |
rfield@2158 | 1833 | buf.append("="); |
rfield@2158 | 1834 | } |
rfield@2158 | 1835 | //add captured locals info: type, name, order |
rfield@2158 | 1836 | for (Symbol fv : getSymbolMap(CAPTURED_VAR).keySet()) { |
rfield@2158 | 1837 | if (fv != self) { |
rfield@2158 | 1838 | buf.append(typeSig(fv.type)); |
rfield@2158 | 1839 | buf.append(" "); |
rfield@2158 | 1840 | buf.append(fv.flatName()); |
rfield@2158 | 1841 | buf.append(","); |
rfield@2158 | 1842 | } |
rfield@2158 | 1843 | } |
rfield@2158 | 1844 | |
rfield@2158 | 1845 | return buf.toString(); |
rfield@2158 | 1846 | } |
rfield@2158 | 1847 | |
rfield@2158 | 1848 | /** |
rfield@2158 | 1849 | * For a non-serializable lambda, generate a simple method. |
rfield@2158 | 1850 | * |
rfield@2158 | 1851 | * @return Name to use for the synthetic lambda method name |
rfield@2158 | 1852 | */ |
rfield@2158 | 1853 | private Name lambdaName() { |
rfield@2158 | 1854 | return names.lambda.append(names.fromString(enclosingMethodName() + "$" + lambdaCount++)); |
rfield@2158 | 1855 | } |
rfield@2158 | 1856 | |
rfield@2158 | 1857 | /** |
rfield@2158 | 1858 | * For a serializable lambda, generate a method name which maximizes |
rfield@2158 | 1859 | * name stability across deserialization. |
rfield@2158 | 1860 | * |
rfield@2158 | 1861 | * @return Name to use for the synthetic lambda method name |
rfield@2158 | 1862 | */ |
rfield@2158 | 1863 | private Name serializedLambdaName() { |
rfield@2158 | 1864 | StringBuilder buf = new StringBuilder(); |
rfield@2158 | 1865 | buf.append(names.lambda); |
rfield@2158 | 1866 | // Append the name of the method enclosing the lambda. |
rfield@2158 | 1867 | buf.append(enclosingMethodName()); |
rfield@2158 | 1868 | buf.append('$'); |
rfield@2158 | 1869 | // Append a hash of the disambiguating string : enclosing method |
rfield@2158 | 1870 | // signature, etc. |
rfield@2158 | 1871 | String disam = serializedLambdaDisambiguation(); |
rfield@2158 | 1872 | buf.append(Integer.toHexString(disam.hashCode())); |
rfield@2158 | 1873 | buf.append('$'); |
rfield@2158 | 1874 | // The above appended name components may not be unique, append |
rfield@2158 | 1875 | // a count based on the above name components. |
rfield@2158 | 1876 | buf.append(syntheticMethodNameCounts.getIndex(buf)); |
rfield@2158 | 1877 | String result = buf.toString(); |
rfield@2158 | 1878 | //System.err.printf("serializedLambdaName: %s -- %s\n", result, disam); |
rfield@2158 | 1879 | return names.fromString(result); |
rfield@2158 | 1880 | } |
rfield@2158 | 1881 | |
rfield@1380 | 1882 | /** |
rfield@1380 | 1883 | * Translate a symbol of a given kind into something suitable for the |
rfield@1380 | 1884 | * synthetic lambda body |
rfield@1380 | 1885 | */ |
mcimadamore@1652 | 1886 | Symbol translate(Name name, final Symbol sym, LambdaSymbolKind skind) { |
jjg@1755 | 1887 | Symbol ret; |
rfield@1587 | 1888 | switch (skind) { |
rfield@1587 | 1889 | case CAPTURED_THIS: |
jjg@1755 | 1890 | ret = sym; // self represented |
jjg@1755 | 1891 | break; |
rfield@1587 | 1892 | case TYPE_VAR: |
rfield@1587 | 1893 | // Just erase the type var |
jjg@1755 | 1894 | ret = new VarSymbol(sym.flags(), name, |
mcimadamore@1595 | 1895 | types.erasure(sym.type), sym.owner); |
vromero@2027 | 1896 | |
vromero@2027 | 1897 | /* this information should also be kept for LVT generation at Gen |
vromero@2027 | 1898 | * a Symbol with pos < startPos won't be tracked. |
vromero@2027 | 1899 | */ |
vromero@2027 | 1900 | ((VarSymbol)ret).pos = ((VarSymbol)sym).pos; |
jjg@1755 | 1901 | break; |
mcimadamore@1612 | 1902 | case CAPTURED_VAR: |
jjg@2146 | 1903 | ret = new VarSymbol(SYNTHETIC | FINAL | PARAMETER, name, types.erasure(sym.type), translatedSym) { |
mcimadamore@1612 | 1904 | @Override |
mcimadamore@1612 | 1905 | public Symbol baseSymbol() { |
mcimadamore@1612 | 1906 | //keep mapping with original captured symbol |
mcimadamore@1612 | 1907 | return sym; |
mcimadamore@1612 | 1908 | } |
mcimadamore@1612 | 1909 | }; |
jjg@1755 | 1910 | break; |
jjg@2146 | 1911 | case LOCAL_VAR: |
rfield@2380 | 1912 | ret = new VarSymbol(sym.flags() & FINAL, name, sym.type, translatedSym); |
jjg@2146 | 1913 | ((VarSymbol) ret).pos = ((VarSymbol) sym).pos; |
jjg@2146 | 1914 | break; |
jjg@2146 | 1915 | case PARAM: |
rfield@2358 | 1916 | ret = new VarSymbol((sym.flags() & FINAL) | PARAMETER, name, types.erasure(sym.type), translatedSym); |
jjg@2146 | 1917 | ((VarSymbol) ret).pos = ((VarSymbol) sym).pos; |
jjg@2146 | 1918 | break; |
rfield@1587 | 1919 | default: |
jjg@1755 | 1920 | ret = makeSyntheticVar(FINAL, name, types.erasure(sym.type), translatedSym); |
jjg@2146 | 1921 | ((VarSymbol) ret).pos = ((VarSymbol) sym).pos; |
rfield@1380 | 1922 | } |
jjg@1755 | 1923 | if (ret != sym) { |
jjg@1802 | 1924 | ret.setDeclarationAttributes(sym.getRawAttributes()); |
jjg@1802 | 1925 | ret.setTypeAttributes(sym.getRawTypeAttributes()); |
jjg@1755 | 1926 | } |
jjg@1755 | 1927 | return ret; |
rfield@1380 | 1928 | } |
rfield@1380 | 1929 | |
rfield@1380 | 1930 | void addSymbol(Symbol sym, LambdaSymbolKind skind) { |
ksrini@2155 | 1931 | Map<Symbol, Symbol> transMap = getSymbolMap(skind); |
mcimadamore@1652 | 1932 | Name preferredName; |
rfield@1380 | 1933 | switch (skind) { |
rfield@1380 | 1934 | case CAPTURED_THIS: |
ksrini@2155 | 1935 | preferredName = names.fromString("encl$" + transMap.size()); |
rfield@1380 | 1936 | break; |
rfield@1380 | 1937 | case CAPTURED_VAR: |
ksrini@2155 | 1938 | preferredName = names.fromString("cap$" + transMap.size()); |
rfield@1380 | 1939 | break; |
rfield@1380 | 1940 | case LOCAL_VAR: |
mcimadamore@1652 | 1941 | preferredName = sym.name; |
rfield@1380 | 1942 | break; |
rfield@1380 | 1943 | case PARAM: |
mcimadamore@1652 | 1944 | preferredName = sym.name; |
rfield@1380 | 1945 | break; |
rfield@1587 | 1946 | case TYPE_VAR: |
mcimadamore@1652 | 1947 | preferredName = sym.name; |
rfield@1587 | 1948 | break; |
rfield@1380 | 1949 | default: throw new AssertionError(); |
rfield@1380 | 1950 | } |
rfield@1380 | 1951 | if (!transMap.containsKey(sym)) { |
rfield@1380 | 1952 | transMap.put(sym, translate(preferredName, sym, skind)); |
rfield@1380 | 1953 | } |
rfield@1380 | 1954 | } |
rfield@1380 | 1955 | |
ksrini@2155 | 1956 | Map<Symbol, Symbol> getSymbolMap(LambdaSymbolKind skind) { |
ksrini@2155 | 1957 | Map<Symbol, Symbol> m = translatedSymbols.get(skind); |
ksrini@2155 | 1958 | Assert.checkNonNull(m); |
ksrini@2155 | 1959 | return m; |
ksrini@2155 | 1960 | } |
ksrini@2155 | 1961 | |
ksrini@2155 | 1962 | JCTree translate(JCIdent lambdaIdent) { |
ksrini@2155 | 1963 | for (Map<Symbol, Symbol> m : translatedSymbols.values()) { |
ksrini@2155 | 1964 | if (m.containsKey(lambdaIdent.sym)) { |
ksrini@2155 | 1965 | Symbol tSym = m.get(lambdaIdent.sym); |
ksrini@2155 | 1966 | JCTree t = make.Ident(tSym).setType(lambdaIdent.type); |
ksrini@2155 | 1967 | tSym.setTypeAttributes(lambdaIdent.sym.getRawTypeAttributes()); |
ksrini@2155 | 1968 | return t; |
rfield@1380 | 1969 | } |
rfield@1380 | 1970 | } |
ksrini@2155 | 1971 | return null; |
rfield@1380 | 1972 | } |
rfield@1380 | 1973 | |
rfield@1380 | 1974 | /** |
rfield@1380 | 1975 | * The translatedSym is not complete/accurate until the analysis is |
rfield@1380 | 1976 | * finished. Once the analysis is finished, the translatedSym is |
rfield@1380 | 1977 | * "completed" -- updated with type information, access modifiers, |
rfield@1380 | 1978 | * and full parameter list. |
rfield@1380 | 1979 | */ |
rfield@1380 | 1980 | void complete() { |
rfield@1380 | 1981 | if (syntheticParams != null) { |
rfield@1380 | 1982 | return; |
rfield@1380 | 1983 | } |
rfield@1380 | 1984 | boolean inInterface = translatedSym.owner.isInterface(); |
rfield@1380 | 1985 | boolean thisReferenced = !getSymbolMap(CAPTURED_THIS).isEmpty(); |
rfield@1380 | 1986 | |
rfield@1752 | 1987 | // If instance access isn't needed, make it static. |
rfield@1752 | 1988 | // Interface instance methods must be default methods. |
rfield@2107 | 1989 | // Lambda methods are private synthetic. |
rfield@2528 | 1990 | // Inherit ACC_STRICT from the enclosing method, or, for clinit, |
rfield@2528 | 1991 | // from the class. |
jjg@2146 | 1992 | translatedSym.flags_field = SYNTHETIC | LAMBDA_METHOD | |
rfield@2528 | 1993 | owner.flags_field & STRICTFP | |
rfield@2528 | 1994 | owner.owner.flags_field & STRICTFP | |
rfield@2107 | 1995 | PRIVATE | |
rfield@1752 | 1996 | (thisReferenced? (inInterface? DEFAULT : 0) : STATIC); |
rfield@1380 | 1997 | |
rfield@1380 | 1998 | //compute synthetic params |
alundblad@2047 | 1999 | ListBuffer<JCVariableDecl> params = new ListBuffer<>(); |
rfield@1380 | 2000 | |
rfield@1380 | 2001 | // The signature of the method is augmented with the following |
rfield@1380 | 2002 | // synthetic parameters: |
rfield@1380 | 2003 | // |
rfield@1380 | 2004 | // 1) reference to enclosing contexts captured by the lambda expression |
rfield@1380 | 2005 | // 2) enclosing locals captured by the lambda expression |
ksrini@2155 | 2006 | for (Symbol thisSym : getSymbolMap(CAPTURED_VAR).values()) { |
rfield@1380 | 2007 | params.append(make.VarDef((VarSymbol) thisSym, null)); |
rfield@1380 | 2008 | } |
rfield@2607 | 2009 | if (methodReferenceReceiver != null) { |
rfield@2607 | 2010 | params.append(make.VarDef( |
rfield@2607 | 2011 | make.Modifiers(PARAMETER|FINAL), |
rfield@2607 | 2012 | names.fromString("$rcvr$"), |
rfield@2607 | 2013 | make.Type(methodReferenceReceiver.type), |
rfield@2607 | 2014 | null)); |
rfield@2607 | 2015 | } |
ksrini@2155 | 2016 | for (Symbol thisSym : getSymbolMap(PARAM).values()) { |
ksrini@2155 | 2017 | params.append(make.VarDef((VarSymbol) thisSym, null)); |
ksrini@2155 | 2018 | } |
rfield@1380 | 2019 | syntheticParams = params.toList(); |
rfield@1380 | 2020 | |
rfield@2158 | 2021 | // Compute and set the lambda name |
rfield@2158 | 2022 | translatedSym.name = isSerializable() |
rfield@2158 | 2023 | ? serializedLambdaName() |
rfield@2158 | 2024 | : lambdaName(); |
rfield@2158 | 2025 | |
rfield@1380 | 2026 | //prepend synthetic args to translated lambda method signature |
rfield@1587 | 2027 | translatedSym.type = types.createMethodTypeWithParameters( |
rfield@1587 | 2028 | generatedLambdaSig(), |
rfield@1380 | 2029 | TreeInfo.types(syntheticParams)); |
rfield@1380 | 2030 | } |
rfield@1380 | 2031 | |
rfield@1380 | 2032 | Type generatedLambdaSig() { |
mcimadamore@1882 | 2033 | return types.erasure(tree.getDescriptorType(types)); |
rfield@1380 | 2034 | } |
rfield@1380 | 2035 | } |
rfield@1380 | 2036 | |
rfield@1380 | 2037 | /** |
rfield@1380 | 2038 | * This class retains all the useful information about a method reference; |
rfield@1380 | 2039 | * the contents of this class are filled by the LambdaAnalyzer visitor, |
rfield@1380 | 2040 | * and the used by the main translation routines in order to adjust method |
rfield@1380 | 2041 | * references (i.e. in case a bridge is needed) |
rfield@1380 | 2042 | */ |
rfield@2607 | 2043 | private final class ReferenceTranslationContext extends TranslationContext<JCMemberReference> { |
rfield@1380 | 2044 | |
rfield@1380 | 2045 | final boolean isSuper; |
rfield@2202 | 2046 | final Symbol sigPolySym; |
rfield@1380 | 2047 | |
rfield@1380 | 2048 | ReferenceTranslationContext(JCMemberReference tree) { |
rfield@1380 | 2049 | super(tree); |
rfield@1380 | 2050 | this.isSuper = tree.hasKind(ReferenceKind.SUPER); |
rfield@2202 | 2051 | this.sigPolySym = isSignaturePolymorphic() |
rfield@2202 | 2052 | ? makePrivateSyntheticMethod(tree.sym.flags(), |
rfield@2202 | 2053 | tree.sym.name, |
rfield@2202 | 2054 | bridgedRefSig(), |
rfield@2202 | 2055 | tree.sym.enclClass()) |
rfield@2202 | 2056 | : null; |
rfield@1380 | 2057 | } |
rfield@1380 | 2058 | |
rfield@1380 | 2059 | /** |
rfield@1380 | 2060 | * Get the opcode associated with this method reference |
rfield@1380 | 2061 | */ |
rfield@1380 | 2062 | int referenceKind() { |
rfield@2607 | 2063 | return LambdaToMethod.this.referenceKind(tree.sym); |
rfield@1380 | 2064 | } |
rfield@1380 | 2065 | |
rfield@1380 | 2066 | boolean needsVarArgsConversion() { |
rfield@1380 | 2067 | return tree.varargsElement != null; |
rfield@1380 | 2068 | } |
rfield@1380 | 2069 | |
rfield@1380 | 2070 | /** |
rfield@1380 | 2071 | * @return Is this an array operation like clone() |
rfield@1380 | 2072 | */ |
rfield@1380 | 2073 | boolean isArrayOp() { |
rfield@1380 | 2074 | return tree.sym.owner == syms.arrayClass; |
rfield@1380 | 2075 | } |
rfield@1380 | 2076 | |
mcimadamore@1615 | 2077 | boolean receiverAccessible() { |
mcimadamore@1615 | 2078 | //hack needed to workaround 292 bug (7087658) |
mcimadamore@1615 | 2079 | //when 292 issue is fixed we should remove this and change the backend |
mcimadamore@1615 | 2080 | //code to always generate a method handle to an accessible method |
mcimadamore@1615 | 2081 | return tree.ownerAccessible; |
mcimadamore@1615 | 2082 | } |
mcimadamore@1615 | 2083 | |
rfield@1380 | 2084 | /** |
rfield@2162 | 2085 | * The VM does not support access across nested classes (8010319). |
rfield@2162 | 2086 | * Were that ever to change, this should be removed. |
rfield@2162 | 2087 | */ |
rfield@2162 | 2088 | boolean isPrivateInOtherClass() { |
rfield@2162 | 2089 | return (tree.sym.flags() & PRIVATE) != 0 && |
rfield@2162 | 2090 | !types.isSameType( |
rfield@2162 | 2091 | types.erasure(tree.sym.enclClass().asType()), |
rfield@2162 | 2092 | types.erasure(owner.enclClass().asType())); |
rfield@2162 | 2093 | } |
rfield@2162 | 2094 | |
rfield@2162 | 2095 | /** |
rfield@2202 | 2096 | * Signature polymorphic methods need special handling. |
rfield@2202 | 2097 | * e.g. MethodHandle.invoke() MethodHandle.invokeExact() |
rfield@2202 | 2098 | */ |
rfield@2202 | 2099 | final boolean isSignaturePolymorphic() { |
rfield@2202 | 2100 | return tree.sym.kind == MTH && |
rfield@2202 | 2101 | types.isSignaturePolymorphic((MethodSymbol)tree.sym); |
rfield@2202 | 2102 | } |
rfield@2202 | 2103 | |
rfield@2202 | 2104 | /** |
rfield@2614 | 2105 | * Erasure destroys the implementation parameter subtype |
rfield@2614 | 2106 | * relationship for intersection types |
rfield@2614 | 2107 | */ |
rfield@2614 | 2108 | boolean interfaceParameterIsIntersectionType() { |
rfield@2614 | 2109 | List<Type> tl = tree.getDescriptorType(types).getParameterTypes(); |
rfield@2614 | 2110 | if (tree.kind == ReferenceKind.UNBOUND) { |
rfield@2614 | 2111 | tl = tl.tail; |
rfield@2614 | 2112 | } |
rfield@2614 | 2113 | for (; tl.nonEmpty(); tl = tl.tail) { |
rfield@2614 | 2114 | Type pt = tl.head; |
rfield@2614 | 2115 | if (pt.getKind() == TypeKind.TYPEVAR) { |
rfield@2614 | 2116 | TypeVar tv = (TypeVar) pt; |
rfield@2614 | 2117 | if (tv.bound.getKind() == TypeKind.INTERSECTION) { |
rfield@2614 | 2118 | return true; |
rfield@2614 | 2119 | } |
rfield@2614 | 2120 | } |
rfield@2614 | 2121 | } |
rfield@2614 | 2122 | return false; |
rfield@2614 | 2123 | } |
rfield@2614 | 2124 | |
rfield@2614 | 2125 | /** |
rfield@2607 | 2126 | * Does this reference need to be converted to a lambda |
rfield@2607 | 2127 | * (i.e. var args need to be expanded or "super" is used) |
rfield@1380 | 2128 | */ |
rfield@2607 | 2129 | final boolean needsConversionToLambda() { |
rfield@2614 | 2130 | return interfaceParameterIsIntersectionType() || |
rfield@2614 | 2131 | isSuper || |
rfield@2614 | 2132 | needsVarArgsConversion() || |
rfield@2614 | 2133 | isArrayOp() || |
rfield@2162 | 2134 | isPrivateInOtherClass() || |
rfield@2607 | 2135 | !receiverAccessible() || |
rfield@2607 | 2136 | (tree.getMode() == ReferenceMode.NEW && |
rfield@2607 | 2137 | tree.kind != ReferenceKind.ARRAY_CTOR && |
rfield@2607 | 2138 | (tree.sym.owner.isLocal() || tree.sym.owner.isInner())); |
rfield@1380 | 2139 | } |
rfield@1380 | 2140 | |
rfield@1380 | 2141 | Type generatedRefSig() { |
rfield@1380 | 2142 | return types.erasure(tree.sym.type); |
rfield@1380 | 2143 | } |
rfield@1380 | 2144 | |
rfield@1380 | 2145 | Type bridgedRefSig() { |
mcimadamore@1882 | 2146 | return types.erasure(types.findDescriptorSymbol(tree.targets.head.tsym).type); |
rfield@1380 | 2147 | } |
rfield@1380 | 2148 | } |
rfield@1380 | 2149 | } |
rfield@1380 | 2150 | // </editor-fold> |
rfield@1380 | 2151 | |
ksrini@2155 | 2152 | /* |
ksrini@2155 | 2153 | * These keys provide mappings for various translated lambda symbols |
ksrini@2155 | 2154 | * and the prevailing order must be maintained. |
ksrini@2155 | 2155 | */ |
rfield@1380 | 2156 | enum LambdaSymbolKind { |
ksrini@2155 | 2157 | PARAM, // original to translated lambda parameters |
ksrini@2155 | 2158 | LOCAL_VAR, // original to translated lambda locals |
ksrini@2155 | 2159 | CAPTURED_VAR, // variables in enclosing scope to translated synthetic parameters |
ksrini@2155 | 2160 | CAPTURED_THIS, // class symbols to translated synthetic parameters (for captured member access) |
ksrini@2155 | 2161 | TYPE_VAR; // original to translated lambda type variables |
rfield@1587 | 2162 | } |
rfield@1587 | 2163 | |
rfield@1587 | 2164 | /** |
rfield@1587 | 2165 | * **************************************************************** |
rfield@1587 | 2166 | * Signature Generation |
rfield@1587 | 2167 | * **************************************************************** |
rfield@1587 | 2168 | */ |
rfield@1587 | 2169 | |
rfield@2158 | 2170 | private String typeSig(Type type) { |
rfield@1587 | 2171 | L2MSignatureGenerator sg = new L2MSignatureGenerator(); |
rfield@1587 | 2172 | sg.assembleSig(type); |
rfield@1587 | 2173 | return sg.toString(); |
rfield@1587 | 2174 | } |
rfield@1587 | 2175 | |
rfield@1587 | 2176 | private String classSig(Type type) { |
rfield@1587 | 2177 | L2MSignatureGenerator sg = new L2MSignatureGenerator(); |
rfield@1587 | 2178 | sg.assembleClassSig(type); |
rfield@1587 | 2179 | return sg.toString(); |
rfield@1587 | 2180 | } |
rfield@1587 | 2181 | |
rfield@1587 | 2182 | /** |
rfield@1587 | 2183 | * Signature Generation |
rfield@1587 | 2184 | */ |
rfield@1587 | 2185 | private class L2MSignatureGenerator extends Types.SignatureGenerator { |
rfield@1587 | 2186 | |
rfield@1587 | 2187 | /** |
rfield@1587 | 2188 | * An output buffer for type signatures. |
rfield@1587 | 2189 | */ |
rfield@1587 | 2190 | StringBuilder sb = new StringBuilder(); |
rfield@1587 | 2191 | |
rfield@1587 | 2192 | L2MSignatureGenerator() { |
rfield@1587 | 2193 | super(types); |
rfield@1587 | 2194 | } |
rfield@1587 | 2195 | |
rfield@1587 | 2196 | @Override |
rfield@1587 | 2197 | protected void append(char ch) { |
rfield@1587 | 2198 | sb.append(ch); |
rfield@1587 | 2199 | } |
rfield@1587 | 2200 | |
rfield@1587 | 2201 | @Override |
rfield@1587 | 2202 | protected void append(byte[] ba) { |
rfield@1587 | 2203 | sb.append(new String(ba)); |
rfield@1587 | 2204 | } |
rfield@1587 | 2205 | |
rfield@1587 | 2206 | @Override |
rfield@1587 | 2207 | protected void append(Name name) { |
rfield@1587 | 2208 | sb.append(name.toString()); |
rfield@1587 | 2209 | } |
rfield@1587 | 2210 | |
rfield@1587 | 2211 | @Override |
rfield@1587 | 2212 | public String toString() { |
rfield@1587 | 2213 | return sb.toString(); |
rfield@1587 | 2214 | } |
rfield@1380 | 2215 | } |
rfield@1380 | 2216 | } |