Mon, 16 Oct 2017 16:07:48 +0800
merge
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. Oracle designates this |
aoqi@0 | 8 | * particular file as subject to the "Classpath" exception as provided |
aoqi@0 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
aoqi@0 | 10 | * |
aoqi@0 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 15 | * accompanied this code). |
aoqi@0 | 16 | * |
aoqi@0 | 17 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 20 | * |
aoqi@0 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 22 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 23 | * questions. |
aoqi@0 | 24 | */ |
aoqi@0 | 25 | |
aoqi@0 | 26 | package com.sun.tools.javac.comp; |
aoqi@0 | 27 | |
aoqi@0 | 28 | import java.util.*; |
aoqi@0 | 29 | |
aoqi@0 | 30 | import com.sun.tools.javac.code.*; |
aoqi@0 | 31 | import com.sun.tools.javac.code.Type.AnnotatedType; |
aoqi@0 | 32 | import com.sun.tools.javac.jvm.*; |
aoqi@0 | 33 | import com.sun.tools.javac.main.Option.PkgInfo; |
aoqi@0 | 34 | import com.sun.tools.javac.tree.*; |
aoqi@0 | 35 | import com.sun.tools.javac.util.*; |
aoqi@0 | 36 | import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; |
aoqi@0 | 37 | import com.sun.tools.javac.util.List; |
aoqi@0 | 38 | |
aoqi@0 | 39 | import com.sun.tools.javac.code.Symbol.*; |
aoqi@0 | 40 | import com.sun.tools.javac.tree.JCTree.*; |
aoqi@0 | 41 | import com.sun.tools.javac.code.Type.*; |
aoqi@0 | 42 | |
aoqi@0 | 43 | import com.sun.tools.javac.jvm.Target; |
aoqi@0 | 44 | import com.sun.tools.javac.tree.EndPosTable; |
aoqi@0 | 45 | |
aoqi@0 | 46 | import static com.sun.tools.javac.code.Flags.*; |
aoqi@0 | 47 | import static com.sun.tools.javac.code.Flags.BLOCK; |
aoqi@0 | 48 | import static com.sun.tools.javac.code.Kinds.*; |
aoqi@0 | 49 | import static com.sun.tools.javac.code.TypeTag.*; |
aoqi@0 | 50 | import static com.sun.tools.javac.jvm.ByteCodes.*; |
aoqi@0 | 51 | import static com.sun.tools.javac.tree.JCTree.Tag.*; |
aoqi@0 | 52 | |
aoqi@0 | 53 | /** This pass translates away some syntactic sugar: inner classes, |
aoqi@0 | 54 | * class literals, assertions, foreach loops, etc. |
aoqi@0 | 55 | * |
aoqi@0 | 56 | * <p><b>This is NOT part of any supported API. |
aoqi@0 | 57 | * If you write code that depends on this, you do so at your own risk. |
aoqi@0 | 58 | * This code and its internal interfaces are subject to change or |
aoqi@0 | 59 | * deletion without notice.</b> |
aoqi@0 | 60 | */ |
aoqi@0 | 61 | public class Lower extends TreeTranslator { |
aoqi@0 | 62 | protected static final Context.Key<Lower> lowerKey = |
aoqi@0 | 63 | new Context.Key<Lower>(); |
aoqi@0 | 64 | |
aoqi@0 | 65 | public static Lower instance(Context context) { |
aoqi@0 | 66 | Lower instance = context.get(lowerKey); |
aoqi@0 | 67 | if (instance == null) |
aoqi@0 | 68 | instance = new Lower(context); |
aoqi@0 | 69 | return instance; |
aoqi@0 | 70 | } |
aoqi@0 | 71 | |
aoqi@0 | 72 | private Names names; |
aoqi@0 | 73 | private Log log; |
aoqi@0 | 74 | private Symtab syms; |
aoqi@0 | 75 | private Resolve rs; |
aoqi@0 | 76 | private Check chk; |
aoqi@0 | 77 | private Attr attr; |
aoqi@0 | 78 | private TreeMaker make; |
aoqi@0 | 79 | private DiagnosticPosition make_pos; |
aoqi@0 | 80 | private ClassWriter writer; |
aoqi@0 | 81 | private ClassReader reader; |
aoqi@0 | 82 | private ConstFold cfolder; |
aoqi@0 | 83 | private Target target; |
aoqi@0 | 84 | private Source source; |
aoqi@0 | 85 | private final TypeEnvs typeEnvs; |
aoqi@0 | 86 | private boolean allowEnums; |
aoqi@0 | 87 | private final Name dollarAssertionsDisabled; |
aoqi@0 | 88 | private final Name classDollar; |
aoqi@0 | 89 | private Types types; |
aoqi@0 | 90 | private boolean debugLower; |
aoqi@0 | 91 | private PkgInfo pkginfoOpt; |
aoqi@0 | 92 | |
aoqi@0 | 93 | protected Lower(Context context) { |
aoqi@0 | 94 | context.put(lowerKey, this); |
aoqi@0 | 95 | names = Names.instance(context); |
aoqi@0 | 96 | log = Log.instance(context); |
aoqi@0 | 97 | syms = Symtab.instance(context); |
aoqi@0 | 98 | rs = Resolve.instance(context); |
aoqi@0 | 99 | chk = Check.instance(context); |
aoqi@0 | 100 | attr = Attr.instance(context); |
aoqi@0 | 101 | make = TreeMaker.instance(context); |
aoqi@0 | 102 | writer = ClassWriter.instance(context); |
aoqi@0 | 103 | reader = ClassReader.instance(context); |
aoqi@0 | 104 | cfolder = ConstFold.instance(context); |
aoqi@0 | 105 | target = Target.instance(context); |
aoqi@0 | 106 | source = Source.instance(context); |
aoqi@0 | 107 | typeEnvs = TypeEnvs.instance(context); |
aoqi@0 | 108 | allowEnums = source.allowEnums(); |
aoqi@0 | 109 | dollarAssertionsDisabled = names. |
aoqi@0 | 110 | fromString(target.syntheticNameChar() + "assertionsDisabled"); |
aoqi@0 | 111 | classDollar = names. |
aoqi@0 | 112 | fromString("class" + target.syntheticNameChar()); |
aoqi@0 | 113 | |
aoqi@0 | 114 | types = Types.instance(context); |
aoqi@0 | 115 | Options options = Options.instance(context); |
aoqi@0 | 116 | debugLower = options.isSet("debuglower"); |
aoqi@0 | 117 | pkginfoOpt = PkgInfo.get(options); |
aoqi@0 | 118 | } |
aoqi@0 | 119 | |
aoqi@0 | 120 | /** The currently enclosing class. |
aoqi@0 | 121 | */ |
aoqi@0 | 122 | ClassSymbol currentClass; |
aoqi@0 | 123 | |
aoqi@0 | 124 | /** A queue of all translated classes. |
aoqi@0 | 125 | */ |
aoqi@0 | 126 | ListBuffer<JCTree> translated; |
aoqi@0 | 127 | |
aoqi@0 | 128 | /** Environment for symbol lookup, set by translateTopLevelClass. |
aoqi@0 | 129 | */ |
aoqi@0 | 130 | Env<AttrContext> attrEnv; |
aoqi@0 | 131 | |
aoqi@0 | 132 | /** A hash table mapping syntax trees to their ending source positions. |
aoqi@0 | 133 | */ |
aoqi@0 | 134 | EndPosTable endPosTable; |
aoqi@0 | 135 | |
aoqi@0 | 136 | /************************************************************************** |
aoqi@0 | 137 | * Global mappings |
aoqi@0 | 138 | *************************************************************************/ |
aoqi@0 | 139 | |
aoqi@0 | 140 | /** A hash table mapping local classes to their definitions. |
aoqi@0 | 141 | */ |
aoqi@0 | 142 | Map<ClassSymbol, JCClassDecl> classdefs; |
aoqi@0 | 143 | |
aoqi@0 | 144 | /** A hash table mapping local classes to a list of pruned trees. |
aoqi@0 | 145 | */ |
aoqi@0 | 146 | public Map<ClassSymbol, List<JCTree>> prunedTree = new WeakHashMap<ClassSymbol, List<JCTree>>(); |
aoqi@0 | 147 | |
aoqi@0 | 148 | /** A hash table mapping virtual accessed symbols in outer subclasses |
aoqi@0 | 149 | * to the actually referred symbol in superclasses. |
aoqi@0 | 150 | */ |
aoqi@0 | 151 | Map<Symbol,Symbol> actualSymbols; |
aoqi@0 | 152 | |
aoqi@0 | 153 | /** The current method definition. |
aoqi@0 | 154 | */ |
aoqi@0 | 155 | JCMethodDecl currentMethodDef; |
aoqi@0 | 156 | |
aoqi@0 | 157 | /** The current method symbol. |
aoqi@0 | 158 | */ |
aoqi@0 | 159 | MethodSymbol currentMethodSym; |
aoqi@0 | 160 | |
aoqi@0 | 161 | /** The currently enclosing outermost class definition. |
aoqi@0 | 162 | */ |
aoqi@0 | 163 | JCClassDecl outermostClassDef; |
aoqi@0 | 164 | |
aoqi@0 | 165 | /** The currently enclosing outermost member definition. |
aoqi@0 | 166 | */ |
aoqi@0 | 167 | JCTree outermostMemberDef; |
aoqi@0 | 168 | |
aoqi@0 | 169 | /** A map from local variable symbols to their translation (as per LambdaToMethod). |
aoqi@0 | 170 | * This is required when a capturing local class is created from a lambda (in which |
aoqi@0 | 171 | * case the captured symbols should be replaced with the translated lambda symbols). |
aoqi@0 | 172 | */ |
aoqi@0 | 173 | Map<Symbol, Symbol> lambdaTranslationMap = null; |
aoqi@0 | 174 | |
aoqi@0 | 175 | /** A navigator class for assembling a mapping from local class symbols |
aoqi@0 | 176 | * to class definition trees. |
aoqi@0 | 177 | * There is only one case; all other cases simply traverse down the tree. |
aoqi@0 | 178 | */ |
aoqi@0 | 179 | class ClassMap extends TreeScanner { |
aoqi@0 | 180 | |
aoqi@0 | 181 | /** All encountered class defs are entered into classdefs table. |
aoqi@0 | 182 | */ |
aoqi@0 | 183 | public void visitClassDef(JCClassDecl tree) { |
aoqi@0 | 184 | classdefs.put(tree.sym, tree); |
aoqi@0 | 185 | super.visitClassDef(tree); |
aoqi@0 | 186 | } |
aoqi@0 | 187 | } |
aoqi@0 | 188 | ClassMap classMap = new ClassMap(); |
aoqi@0 | 189 | |
aoqi@0 | 190 | /** Map a class symbol to its definition. |
aoqi@0 | 191 | * @param c The class symbol of which we want to determine the definition. |
aoqi@0 | 192 | */ |
aoqi@0 | 193 | JCClassDecl classDef(ClassSymbol c) { |
aoqi@0 | 194 | // First lookup the class in the classdefs table. |
aoqi@0 | 195 | JCClassDecl def = classdefs.get(c); |
aoqi@0 | 196 | if (def == null && outermostMemberDef != null) { |
aoqi@0 | 197 | // If this fails, traverse outermost member definition, entering all |
aoqi@0 | 198 | // local classes into classdefs, and try again. |
aoqi@0 | 199 | classMap.scan(outermostMemberDef); |
aoqi@0 | 200 | def = classdefs.get(c); |
aoqi@0 | 201 | } |
aoqi@0 | 202 | if (def == null) { |
aoqi@0 | 203 | // If this fails, traverse outermost class definition, entering all |
aoqi@0 | 204 | // local classes into classdefs, and try again. |
aoqi@0 | 205 | classMap.scan(outermostClassDef); |
aoqi@0 | 206 | def = classdefs.get(c); |
aoqi@0 | 207 | } |
aoqi@0 | 208 | return def; |
aoqi@0 | 209 | } |
aoqi@0 | 210 | |
aoqi@0 | 211 | /** A hash table mapping class symbols to lists of free variables. |
aoqi@0 | 212 | * accessed by them. Only free variables of the method immediately containing |
aoqi@0 | 213 | * a class are associated with that class. |
aoqi@0 | 214 | */ |
aoqi@0 | 215 | Map<ClassSymbol,List<VarSymbol>> freevarCache; |
aoqi@0 | 216 | |
aoqi@0 | 217 | /** A navigator class for collecting the free variables accessed |
aoqi@0 | 218 | * from a local class. There is only one case; all other cases simply |
aoqi@0 | 219 | * traverse down the tree. This class doesn't deal with the specific |
aoqi@0 | 220 | * of Lower - it's an abstract visitor that is meant to be reused in |
aoqi@0 | 221 | * order to share the local variable capture logic. |
aoqi@0 | 222 | */ |
aoqi@0 | 223 | abstract class BasicFreeVarCollector extends TreeScanner { |
aoqi@0 | 224 | |
aoqi@0 | 225 | /** Add all free variables of class c to fvs list |
aoqi@0 | 226 | * unless they are already there. |
aoqi@0 | 227 | */ |
aoqi@0 | 228 | abstract void addFreeVars(ClassSymbol c); |
aoqi@0 | 229 | |
aoqi@0 | 230 | /** If tree refers to a variable in owner of local class, add it to |
aoqi@0 | 231 | * free variables list. |
aoqi@0 | 232 | */ |
aoqi@0 | 233 | public void visitIdent(JCIdent tree) { |
aoqi@0 | 234 | visitSymbol(tree.sym); |
aoqi@0 | 235 | } |
aoqi@0 | 236 | // where |
aoqi@0 | 237 | abstract void visitSymbol(Symbol _sym); |
aoqi@0 | 238 | |
aoqi@0 | 239 | /** If tree refers to a class instance creation expression |
aoqi@0 | 240 | * add all free variables of the freshly created class. |
aoqi@0 | 241 | */ |
aoqi@0 | 242 | public void visitNewClass(JCNewClass tree) { |
aoqi@0 | 243 | ClassSymbol c = (ClassSymbol)tree.constructor.owner; |
aoqi@0 | 244 | addFreeVars(c); |
aoqi@0 | 245 | super.visitNewClass(tree); |
aoqi@0 | 246 | } |
aoqi@0 | 247 | |
aoqi@0 | 248 | /** If tree refers to a superclass constructor call, |
aoqi@0 | 249 | * add all free variables of the superclass. |
aoqi@0 | 250 | */ |
aoqi@0 | 251 | public void visitApply(JCMethodInvocation tree) { |
aoqi@0 | 252 | if (TreeInfo.name(tree.meth) == names._super) { |
aoqi@0 | 253 | addFreeVars((ClassSymbol) TreeInfo.symbol(tree.meth).owner); |
aoqi@0 | 254 | } |
aoqi@0 | 255 | super.visitApply(tree); |
aoqi@0 | 256 | } |
aoqi@0 | 257 | } |
aoqi@0 | 258 | |
aoqi@0 | 259 | /** |
aoqi@0 | 260 | * Lower-specific subclass of {@code BasicFreeVarCollector}. |
aoqi@0 | 261 | */ |
aoqi@0 | 262 | class FreeVarCollector extends BasicFreeVarCollector { |
aoqi@0 | 263 | |
aoqi@0 | 264 | /** The owner of the local class. |
aoqi@0 | 265 | */ |
aoqi@0 | 266 | Symbol owner; |
aoqi@0 | 267 | |
aoqi@0 | 268 | /** The local class. |
aoqi@0 | 269 | */ |
aoqi@0 | 270 | ClassSymbol clazz; |
aoqi@0 | 271 | |
aoqi@0 | 272 | /** The list of owner's variables accessed from within the local class, |
aoqi@0 | 273 | * without any duplicates. |
aoqi@0 | 274 | */ |
aoqi@0 | 275 | List<VarSymbol> fvs; |
aoqi@0 | 276 | |
aoqi@0 | 277 | FreeVarCollector(ClassSymbol clazz) { |
aoqi@0 | 278 | this.clazz = clazz; |
aoqi@0 | 279 | this.owner = clazz.owner; |
aoqi@0 | 280 | this.fvs = List.nil(); |
aoqi@0 | 281 | } |
aoqi@0 | 282 | |
aoqi@0 | 283 | /** Add free variable to fvs list unless it is already there. |
aoqi@0 | 284 | */ |
aoqi@0 | 285 | private void addFreeVar(VarSymbol v) { |
aoqi@0 | 286 | for (List<VarSymbol> l = fvs; l.nonEmpty(); l = l.tail) |
aoqi@0 | 287 | if (l.head == v) return; |
aoqi@0 | 288 | fvs = fvs.prepend(v); |
aoqi@0 | 289 | } |
aoqi@0 | 290 | |
aoqi@0 | 291 | @Override |
aoqi@0 | 292 | void addFreeVars(ClassSymbol c) { |
aoqi@0 | 293 | List<VarSymbol> fvs = freevarCache.get(c); |
aoqi@0 | 294 | if (fvs != null) { |
aoqi@0 | 295 | for (List<VarSymbol> l = fvs; l.nonEmpty(); l = l.tail) { |
aoqi@0 | 296 | addFreeVar(l.head); |
aoqi@0 | 297 | } |
aoqi@0 | 298 | } |
aoqi@0 | 299 | } |
aoqi@0 | 300 | |
aoqi@0 | 301 | @Override |
aoqi@0 | 302 | void visitSymbol(Symbol _sym) { |
aoqi@0 | 303 | Symbol sym = _sym; |
aoqi@0 | 304 | if (sym.kind == VAR || sym.kind == MTH) { |
aoqi@0 | 305 | while (sym != null && sym.owner != owner) |
aoqi@0 | 306 | sym = proxies.lookup(proxyName(sym.name)).sym; |
aoqi@0 | 307 | if (sym != null && sym.owner == owner) { |
aoqi@0 | 308 | VarSymbol v = (VarSymbol)sym; |
aoqi@0 | 309 | if (v.getConstValue() == null) { |
aoqi@0 | 310 | addFreeVar(v); |
aoqi@0 | 311 | } |
aoqi@0 | 312 | } else { |
aoqi@0 | 313 | if (outerThisStack.head != null && |
aoqi@0 | 314 | outerThisStack.head != _sym) |
aoqi@0 | 315 | visitSymbol(outerThisStack.head); |
aoqi@0 | 316 | } |
aoqi@0 | 317 | } |
aoqi@0 | 318 | } |
aoqi@0 | 319 | |
aoqi@0 | 320 | /** If tree refers to a class instance creation expression |
aoqi@0 | 321 | * add all free variables of the freshly created class. |
aoqi@0 | 322 | */ |
aoqi@0 | 323 | public void visitNewClass(JCNewClass tree) { |
aoqi@0 | 324 | ClassSymbol c = (ClassSymbol)tree.constructor.owner; |
aoqi@0 | 325 | if (tree.encl == null && |
aoqi@0 | 326 | c.hasOuterInstance() && |
aoqi@0 | 327 | outerThisStack.head != null) |
aoqi@0 | 328 | visitSymbol(outerThisStack.head); |
aoqi@0 | 329 | super.visitNewClass(tree); |
aoqi@0 | 330 | } |
aoqi@0 | 331 | |
aoqi@0 | 332 | /** If tree refers to a qualified this or super expression |
aoqi@0 | 333 | * for anything but the current class, add the outer this |
aoqi@0 | 334 | * stack as a free variable. |
aoqi@0 | 335 | */ |
aoqi@0 | 336 | public void visitSelect(JCFieldAccess tree) { |
aoqi@0 | 337 | if ((tree.name == names._this || tree.name == names._super) && |
aoqi@0 | 338 | tree.selected.type.tsym != clazz && |
aoqi@0 | 339 | outerThisStack.head != null) |
aoqi@0 | 340 | visitSymbol(outerThisStack.head); |
aoqi@0 | 341 | super.visitSelect(tree); |
aoqi@0 | 342 | } |
aoqi@0 | 343 | |
aoqi@0 | 344 | /** If tree refers to a superclass constructor call, |
aoqi@0 | 345 | * add all free variables of the superclass. |
aoqi@0 | 346 | */ |
aoqi@0 | 347 | public void visitApply(JCMethodInvocation tree) { |
aoqi@0 | 348 | if (TreeInfo.name(tree.meth) == names._super) { |
aoqi@0 | 349 | Symbol constructor = TreeInfo.symbol(tree.meth); |
aoqi@0 | 350 | ClassSymbol c = (ClassSymbol)constructor.owner; |
aoqi@0 | 351 | if (c.hasOuterInstance() && |
aoqi@0 | 352 | !tree.meth.hasTag(SELECT) && |
aoqi@0 | 353 | outerThisStack.head != null) |
aoqi@0 | 354 | visitSymbol(outerThisStack.head); |
aoqi@0 | 355 | } |
aoqi@0 | 356 | super.visitApply(tree); |
aoqi@0 | 357 | } |
aoqi@0 | 358 | } |
aoqi@0 | 359 | |
aoqi@0 | 360 | ClassSymbol ownerToCopyFreeVarsFrom(ClassSymbol c) { |
aoqi@0 | 361 | if (!c.isLocal()) { |
aoqi@0 | 362 | return null; |
aoqi@0 | 363 | } |
aoqi@0 | 364 | Symbol currentOwner = c.owner; |
aoqi@0 | 365 | while ((currentOwner.owner.kind & TYP) != 0 && currentOwner.isLocal()) { |
aoqi@0 | 366 | currentOwner = currentOwner.owner; |
aoqi@0 | 367 | } |
aoqi@0 | 368 | if ((currentOwner.owner.kind & (VAR | MTH)) != 0 && c.isSubClass(currentOwner, types)) { |
aoqi@0 | 369 | return (ClassSymbol)currentOwner; |
aoqi@0 | 370 | } |
aoqi@0 | 371 | return null; |
aoqi@0 | 372 | } |
aoqi@0 | 373 | |
aoqi@0 | 374 | /** Return the variables accessed from within a local class, which |
aoqi@0 | 375 | * are declared in the local class' owner. |
aoqi@0 | 376 | * (in reverse order of first access). |
aoqi@0 | 377 | */ |
aoqi@0 | 378 | List<VarSymbol> freevars(ClassSymbol c) { |
aoqi@0 | 379 | List<VarSymbol> fvs = freevarCache.get(c); |
aoqi@0 | 380 | if (fvs != null) { |
aoqi@0 | 381 | return fvs; |
aoqi@0 | 382 | } |
aoqi@0 | 383 | if ((c.owner.kind & (VAR | MTH)) != 0) { |
aoqi@0 | 384 | FreeVarCollector collector = new FreeVarCollector(c); |
aoqi@0 | 385 | collector.scan(classDef(c)); |
aoqi@0 | 386 | fvs = collector.fvs; |
aoqi@0 | 387 | freevarCache.put(c, fvs); |
aoqi@0 | 388 | return fvs; |
aoqi@0 | 389 | } else { |
aoqi@0 | 390 | ClassSymbol owner = ownerToCopyFreeVarsFrom(c); |
aoqi@0 | 391 | if (owner != null) { |
aoqi@0 | 392 | fvs = freevarCache.get(owner); |
aoqi@0 | 393 | freevarCache.put(c, fvs); |
aoqi@0 | 394 | return fvs; |
aoqi@0 | 395 | } else { |
aoqi@0 | 396 | return List.nil(); |
aoqi@0 | 397 | } |
aoqi@0 | 398 | } |
aoqi@0 | 399 | } |
aoqi@0 | 400 | |
aoqi@0 | 401 | Map<TypeSymbol,EnumMapping> enumSwitchMap = new LinkedHashMap<TypeSymbol,EnumMapping>(); |
aoqi@0 | 402 | |
aoqi@0 | 403 | EnumMapping mapForEnum(DiagnosticPosition pos, TypeSymbol enumClass) { |
aoqi@0 | 404 | EnumMapping map = enumSwitchMap.get(enumClass); |
aoqi@0 | 405 | if (map == null) |
aoqi@0 | 406 | enumSwitchMap.put(enumClass, map = new EnumMapping(pos, enumClass)); |
aoqi@0 | 407 | return map; |
aoqi@0 | 408 | } |
aoqi@0 | 409 | |
aoqi@0 | 410 | /** This map gives a translation table to be used for enum |
aoqi@0 | 411 | * switches. |
aoqi@0 | 412 | * |
aoqi@0 | 413 | * <p>For each enum that appears as the type of a switch |
aoqi@0 | 414 | * expression, we maintain an EnumMapping to assist in the |
aoqi@0 | 415 | * translation, as exemplified by the following example: |
aoqi@0 | 416 | * |
aoqi@0 | 417 | * <p>we translate |
aoqi@0 | 418 | * <pre> |
aoqi@0 | 419 | * switch(colorExpression) { |
aoqi@0 | 420 | * case red: stmt1; |
aoqi@0 | 421 | * case green: stmt2; |
aoqi@0 | 422 | * } |
aoqi@0 | 423 | * </pre> |
aoqi@0 | 424 | * into |
aoqi@0 | 425 | * <pre> |
aoqi@0 | 426 | * switch(Outer$0.$EnumMap$Color[colorExpression.ordinal()]) { |
aoqi@0 | 427 | * case 1: stmt1; |
aoqi@0 | 428 | * case 2: stmt2 |
aoqi@0 | 429 | * } |
aoqi@0 | 430 | * </pre> |
aoqi@0 | 431 | * with the auxiliary table initialized as follows: |
aoqi@0 | 432 | * <pre> |
aoqi@0 | 433 | * class Outer$0 { |
aoqi@0 | 434 | * synthetic final int[] $EnumMap$Color = new int[Color.values().length]; |
aoqi@0 | 435 | * static { |
aoqi@0 | 436 | * try { $EnumMap$Color[red.ordinal()] = 1; } catch (NoSuchFieldError ex) {} |
aoqi@0 | 437 | * try { $EnumMap$Color[green.ordinal()] = 2; } catch (NoSuchFieldError ex) {} |
aoqi@0 | 438 | * } |
aoqi@0 | 439 | * } |
aoqi@0 | 440 | * </pre> |
aoqi@0 | 441 | * class EnumMapping provides mapping data and support methods for this translation. |
aoqi@0 | 442 | */ |
aoqi@0 | 443 | class EnumMapping { |
aoqi@0 | 444 | EnumMapping(DiagnosticPosition pos, TypeSymbol forEnum) { |
aoqi@0 | 445 | this.forEnum = forEnum; |
aoqi@0 | 446 | this.values = new LinkedHashMap<VarSymbol,Integer>(); |
aoqi@0 | 447 | this.pos = pos; |
aoqi@0 | 448 | Name varName = names |
aoqi@0 | 449 | .fromString(target.syntheticNameChar() + |
aoqi@0 | 450 | "SwitchMap" + |
aoqi@0 | 451 | target.syntheticNameChar() + |
aoqi@0 | 452 | writer.xClassName(forEnum.type).toString() |
aoqi@0 | 453 | .replace('/', '.') |
aoqi@0 | 454 | .replace('.', target.syntheticNameChar())); |
aoqi@0 | 455 | ClassSymbol outerCacheClass = outerCacheClass(); |
aoqi@0 | 456 | this.mapVar = new VarSymbol(STATIC | SYNTHETIC | FINAL, |
aoqi@0 | 457 | varName, |
aoqi@0 | 458 | new ArrayType(syms.intType, syms.arrayClass), |
aoqi@0 | 459 | outerCacheClass); |
aoqi@0 | 460 | enterSynthetic(pos, mapVar, outerCacheClass.members()); |
aoqi@0 | 461 | } |
aoqi@0 | 462 | |
aoqi@0 | 463 | DiagnosticPosition pos = null; |
aoqi@0 | 464 | |
aoqi@0 | 465 | // the next value to use |
aoqi@0 | 466 | int next = 1; // 0 (unused map elements) go to the default label |
aoqi@0 | 467 | |
aoqi@0 | 468 | // the enum for which this is a map |
aoqi@0 | 469 | final TypeSymbol forEnum; |
aoqi@0 | 470 | |
aoqi@0 | 471 | // the field containing the map |
aoqi@0 | 472 | final VarSymbol mapVar; |
aoqi@0 | 473 | |
aoqi@0 | 474 | // the mapped values |
aoqi@0 | 475 | final Map<VarSymbol,Integer> values; |
aoqi@0 | 476 | |
aoqi@0 | 477 | JCLiteral forConstant(VarSymbol v) { |
aoqi@0 | 478 | Integer result = values.get(v); |
aoqi@0 | 479 | if (result == null) |
aoqi@0 | 480 | values.put(v, result = next++); |
aoqi@0 | 481 | return make.Literal(result); |
aoqi@0 | 482 | } |
aoqi@0 | 483 | |
aoqi@0 | 484 | // generate the field initializer for the map |
aoqi@0 | 485 | void translate() { |
aoqi@0 | 486 | make.at(pos.getStartPosition()); |
aoqi@0 | 487 | JCClassDecl owner = classDef((ClassSymbol)mapVar.owner); |
aoqi@0 | 488 | |
aoqi@0 | 489 | // synthetic static final int[] $SwitchMap$Color = new int[Color.values().length]; |
aoqi@0 | 490 | MethodSymbol valuesMethod = lookupMethod(pos, |
aoqi@0 | 491 | names.values, |
aoqi@0 | 492 | forEnum.type, |
aoqi@0 | 493 | List.<Type>nil()); |
aoqi@0 | 494 | JCExpression size = make // Color.values().length |
aoqi@0 | 495 | .Select(make.App(make.QualIdent(valuesMethod)), |
aoqi@0 | 496 | syms.lengthVar); |
aoqi@0 | 497 | JCExpression mapVarInit = make |
aoqi@0 | 498 | .NewArray(make.Type(syms.intType), List.of(size), null) |
aoqi@0 | 499 | .setType(new ArrayType(syms.intType, syms.arrayClass)); |
aoqi@0 | 500 | |
aoqi@0 | 501 | // try { $SwitchMap$Color[red.ordinal()] = 1; } catch (java.lang.NoSuchFieldError ex) {} |
aoqi@0 | 502 | ListBuffer<JCStatement> stmts = new ListBuffer<JCStatement>(); |
aoqi@0 | 503 | Symbol ordinalMethod = lookupMethod(pos, |
aoqi@0 | 504 | names.ordinal, |
aoqi@0 | 505 | forEnum.type, |
aoqi@0 | 506 | List.<Type>nil()); |
aoqi@0 | 507 | List<JCCatch> catcher = List.<JCCatch>nil() |
aoqi@0 | 508 | .prepend(make.Catch(make.VarDef(new VarSymbol(PARAMETER, names.ex, |
aoqi@0 | 509 | syms.noSuchFieldErrorType, |
aoqi@0 | 510 | syms.noSymbol), |
aoqi@0 | 511 | null), |
aoqi@0 | 512 | make.Block(0, List.<JCStatement>nil()))); |
aoqi@0 | 513 | for (Map.Entry<VarSymbol,Integer> e : values.entrySet()) { |
aoqi@0 | 514 | VarSymbol enumerator = e.getKey(); |
aoqi@0 | 515 | Integer mappedValue = e.getValue(); |
aoqi@0 | 516 | JCExpression assign = make |
aoqi@0 | 517 | .Assign(make.Indexed(mapVar, |
aoqi@0 | 518 | make.App(make.Select(make.QualIdent(enumerator), |
aoqi@0 | 519 | ordinalMethod))), |
aoqi@0 | 520 | make.Literal(mappedValue)) |
aoqi@0 | 521 | .setType(syms.intType); |
aoqi@0 | 522 | JCStatement exec = make.Exec(assign); |
aoqi@0 | 523 | JCStatement _try = make.Try(make.Block(0, List.of(exec)), catcher, null); |
aoqi@0 | 524 | stmts.append(_try); |
aoqi@0 | 525 | } |
aoqi@0 | 526 | |
aoqi@0 | 527 | owner.defs = owner.defs |
aoqi@0 | 528 | .prepend(make.Block(STATIC, stmts.toList())) |
aoqi@0 | 529 | .prepend(make.VarDef(mapVar, mapVarInit)); |
aoqi@0 | 530 | } |
aoqi@0 | 531 | } |
aoqi@0 | 532 | |
aoqi@0 | 533 | |
aoqi@0 | 534 | /************************************************************************** |
aoqi@0 | 535 | * Tree building blocks |
aoqi@0 | 536 | *************************************************************************/ |
aoqi@0 | 537 | |
aoqi@0 | 538 | /** Equivalent to make.at(pos.getStartPosition()) with side effect of caching |
aoqi@0 | 539 | * pos as make_pos, for use in diagnostics. |
aoqi@0 | 540 | **/ |
aoqi@0 | 541 | TreeMaker make_at(DiagnosticPosition pos) { |
aoqi@0 | 542 | make_pos = pos; |
aoqi@0 | 543 | return make.at(pos); |
aoqi@0 | 544 | } |
aoqi@0 | 545 | |
aoqi@0 | 546 | /** Make an attributed tree representing a literal. This will be an |
aoqi@0 | 547 | * Ident node in the case of boolean literals, a Literal node in all |
aoqi@0 | 548 | * other cases. |
aoqi@0 | 549 | * @param type The literal's type. |
aoqi@0 | 550 | * @param value The literal's value. |
aoqi@0 | 551 | */ |
aoqi@0 | 552 | JCExpression makeLit(Type type, Object value) { |
aoqi@0 | 553 | return make.Literal(type.getTag(), value).setType(type.constType(value)); |
aoqi@0 | 554 | } |
aoqi@0 | 555 | |
aoqi@0 | 556 | /** Make an attributed tree representing null. |
aoqi@0 | 557 | */ |
aoqi@0 | 558 | JCExpression makeNull() { |
aoqi@0 | 559 | return makeLit(syms.botType, null); |
aoqi@0 | 560 | } |
aoqi@0 | 561 | |
aoqi@0 | 562 | /** Make an attributed class instance creation expression. |
aoqi@0 | 563 | * @param ctype The class type. |
aoqi@0 | 564 | * @param args The constructor arguments. |
aoqi@0 | 565 | */ |
aoqi@0 | 566 | JCNewClass makeNewClass(Type ctype, List<JCExpression> args) { |
aoqi@0 | 567 | JCNewClass tree = make.NewClass(null, |
aoqi@0 | 568 | null, make.QualIdent(ctype.tsym), args, null); |
aoqi@0 | 569 | tree.constructor = rs.resolveConstructor( |
aoqi@0 | 570 | make_pos, attrEnv, ctype, TreeInfo.types(args), List.<Type>nil()); |
aoqi@0 | 571 | tree.type = ctype; |
aoqi@0 | 572 | return tree; |
aoqi@0 | 573 | } |
aoqi@0 | 574 | |
aoqi@0 | 575 | /** Make an attributed unary expression. |
aoqi@0 | 576 | * @param optag The operators tree tag. |
aoqi@0 | 577 | * @param arg The operator's argument. |
aoqi@0 | 578 | */ |
aoqi@0 | 579 | JCUnary makeUnary(JCTree.Tag optag, JCExpression arg) { |
aoqi@0 | 580 | JCUnary tree = make.Unary(optag, arg); |
aoqi@0 | 581 | tree.operator = rs.resolveUnaryOperator( |
aoqi@0 | 582 | make_pos, optag, attrEnv, arg.type); |
aoqi@0 | 583 | tree.type = tree.operator.type.getReturnType(); |
aoqi@0 | 584 | return tree; |
aoqi@0 | 585 | } |
aoqi@0 | 586 | |
aoqi@0 | 587 | /** Make an attributed binary expression. |
aoqi@0 | 588 | * @param optag The operators tree tag. |
aoqi@0 | 589 | * @param lhs The operator's left argument. |
aoqi@0 | 590 | * @param rhs The operator's right argument. |
aoqi@0 | 591 | */ |
aoqi@0 | 592 | JCBinary makeBinary(JCTree.Tag optag, JCExpression lhs, JCExpression rhs) { |
aoqi@0 | 593 | JCBinary tree = make.Binary(optag, lhs, rhs); |
aoqi@0 | 594 | tree.operator = rs.resolveBinaryOperator( |
aoqi@0 | 595 | make_pos, optag, attrEnv, lhs.type, rhs.type); |
aoqi@0 | 596 | tree.type = tree.operator.type.getReturnType(); |
aoqi@0 | 597 | return tree; |
aoqi@0 | 598 | } |
aoqi@0 | 599 | |
aoqi@0 | 600 | /** Make an attributed assignop expression. |
aoqi@0 | 601 | * @param optag The operators tree tag. |
aoqi@0 | 602 | * @param lhs The operator's left argument. |
aoqi@0 | 603 | * @param rhs The operator's right argument. |
aoqi@0 | 604 | */ |
aoqi@0 | 605 | JCAssignOp makeAssignop(JCTree.Tag optag, JCTree lhs, JCTree rhs) { |
aoqi@0 | 606 | JCAssignOp tree = make.Assignop(optag, lhs, rhs); |
aoqi@0 | 607 | tree.operator = rs.resolveBinaryOperator( |
aoqi@0 | 608 | make_pos, tree.getTag().noAssignOp(), attrEnv, lhs.type, rhs.type); |
aoqi@0 | 609 | tree.type = lhs.type; |
aoqi@0 | 610 | return tree; |
aoqi@0 | 611 | } |
aoqi@0 | 612 | |
aoqi@0 | 613 | /** Convert tree into string object, unless it has already a |
aoqi@0 | 614 | * reference type.. |
aoqi@0 | 615 | */ |
aoqi@0 | 616 | JCExpression makeString(JCExpression tree) { |
aoqi@0 | 617 | if (!tree.type.isPrimitiveOrVoid()) { |
aoqi@0 | 618 | return tree; |
aoqi@0 | 619 | } else { |
aoqi@0 | 620 | Symbol valueOfSym = lookupMethod(tree.pos(), |
aoqi@0 | 621 | names.valueOf, |
aoqi@0 | 622 | syms.stringType, |
aoqi@0 | 623 | List.of(tree.type)); |
aoqi@0 | 624 | return make.App(make.QualIdent(valueOfSym), List.of(tree)); |
aoqi@0 | 625 | } |
aoqi@0 | 626 | } |
aoqi@0 | 627 | |
aoqi@0 | 628 | /** Create an empty anonymous class definition and enter and complete |
aoqi@0 | 629 | * its symbol. Return the class definition's symbol. |
aoqi@0 | 630 | * and create |
aoqi@0 | 631 | * @param flags The class symbol's flags |
aoqi@0 | 632 | * @param owner The class symbol's owner |
aoqi@0 | 633 | */ |
aoqi@0 | 634 | JCClassDecl makeEmptyClass(long flags, ClassSymbol owner) { |
aoqi@0 | 635 | return makeEmptyClass(flags, owner, null, true); |
aoqi@0 | 636 | } |
aoqi@0 | 637 | |
aoqi@0 | 638 | JCClassDecl makeEmptyClass(long flags, ClassSymbol owner, Name flatname, |
aoqi@0 | 639 | boolean addToDefs) { |
aoqi@0 | 640 | // Create class symbol. |
aoqi@0 | 641 | ClassSymbol c = reader.defineClass(names.empty, owner); |
aoqi@0 | 642 | if (flatname != null) { |
aoqi@0 | 643 | c.flatname = flatname; |
aoqi@0 | 644 | } else { |
aoqi@0 | 645 | c.flatname = chk.localClassName(c); |
aoqi@0 | 646 | } |
aoqi@0 | 647 | c.sourcefile = owner.sourcefile; |
aoqi@0 | 648 | c.completer = null; |
aoqi@0 | 649 | c.members_field = new Scope(c); |
aoqi@0 | 650 | c.flags_field = flags; |
aoqi@0 | 651 | ClassType ctype = (ClassType) c.type; |
aoqi@0 | 652 | ctype.supertype_field = syms.objectType; |
aoqi@0 | 653 | ctype.interfaces_field = List.nil(); |
aoqi@0 | 654 | |
aoqi@0 | 655 | JCClassDecl odef = classDef(owner); |
aoqi@0 | 656 | |
aoqi@0 | 657 | // Enter class symbol in owner scope and compiled table. |
aoqi@0 | 658 | enterSynthetic(odef.pos(), c, owner.members()); |
aoqi@0 | 659 | chk.compiled.put(c.flatname, c); |
aoqi@0 | 660 | |
aoqi@0 | 661 | // Create class definition tree. |
aoqi@0 | 662 | JCClassDecl cdef = make.ClassDef( |
aoqi@0 | 663 | make.Modifiers(flags), names.empty, |
aoqi@0 | 664 | List.<JCTypeParameter>nil(), |
aoqi@0 | 665 | null, List.<JCExpression>nil(), List.<JCTree>nil()); |
aoqi@0 | 666 | cdef.sym = c; |
aoqi@0 | 667 | cdef.type = c.type; |
aoqi@0 | 668 | |
aoqi@0 | 669 | // Append class definition tree to owner's definitions. |
aoqi@0 | 670 | if (addToDefs) odef.defs = odef.defs.prepend(cdef); |
aoqi@0 | 671 | return cdef; |
aoqi@0 | 672 | } |
aoqi@0 | 673 | |
aoqi@0 | 674 | /************************************************************************** |
aoqi@0 | 675 | * Symbol manipulation utilities |
aoqi@0 | 676 | *************************************************************************/ |
aoqi@0 | 677 | |
aoqi@0 | 678 | /** Enter a synthetic symbol in a given scope, but complain if there was already one there. |
aoqi@0 | 679 | * @param pos Position for error reporting. |
aoqi@0 | 680 | * @param sym The symbol. |
aoqi@0 | 681 | * @param s The scope. |
aoqi@0 | 682 | */ |
aoqi@0 | 683 | private void enterSynthetic(DiagnosticPosition pos, Symbol sym, Scope s) { |
aoqi@0 | 684 | s.enter(sym); |
aoqi@0 | 685 | } |
aoqi@0 | 686 | |
aoqi@0 | 687 | /** Create a fresh synthetic name within a given scope - the unique name is |
aoqi@0 | 688 | * obtained by appending '$' chars at the end of the name until no match |
aoqi@0 | 689 | * is found. |
aoqi@0 | 690 | * |
aoqi@0 | 691 | * @param name base name |
aoqi@0 | 692 | * @param s scope in which the name has to be unique |
aoqi@0 | 693 | * @return fresh synthetic name |
aoqi@0 | 694 | */ |
aoqi@0 | 695 | private Name makeSyntheticName(Name name, Scope s) { |
aoqi@0 | 696 | do { |
aoqi@0 | 697 | name = name.append( |
aoqi@0 | 698 | target.syntheticNameChar(), |
aoqi@0 | 699 | names.empty); |
aoqi@0 | 700 | } while (lookupSynthetic(name, s) != null); |
aoqi@0 | 701 | return name; |
aoqi@0 | 702 | } |
aoqi@0 | 703 | |
aoqi@0 | 704 | /** Check whether synthetic symbols generated during lowering conflict |
aoqi@0 | 705 | * with user-defined symbols. |
aoqi@0 | 706 | * |
aoqi@0 | 707 | * @param translatedTrees lowered class trees |
aoqi@0 | 708 | */ |
aoqi@0 | 709 | void checkConflicts(List<JCTree> translatedTrees) { |
aoqi@0 | 710 | for (JCTree t : translatedTrees) { |
aoqi@0 | 711 | t.accept(conflictsChecker); |
aoqi@0 | 712 | } |
aoqi@0 | 713 | } |
aoqi@0 | 714 | |
aoqi@0 | 715 | JCTree.Visitor conflictsChecker = new TreeScanner() { |
aoqi@0 | 716 | |
aoqi@0 | 717 | TypeSymbol currentClass; |
aoqi@0 | 718 | |
aoqi@0 | 719 | @Override |
aoqi@0 | 720 | public void visitMethodDef(JCMethodDecl that) { |
aoqi@0 | 721 | chk.checkConflicts(that.pos(), that.sym, currentClass); |
aoqi@0 | 722 | super.visitMethodDef(that); |
aoqi@0 | 723 | } |
aoqi@0 | 724 | |
aoqi@0 | 725 | @Override |
aoqi@0 | 726 | public void visitVarDef(JCVariableDecl that) { |
aoqi@0 | 727 | if (that.sym.owner.kind == TYP) { |
aoqi@0 | 728 | chk.checkConflicts(that.pos(), that.sym, currentClass); |
aoqi@0 | 729 | } |
aoqi@0 | 730 | super.visitVarDef(that); |
aoqi@0 | 731 | } |
aoqi@0 | 732 | |
aoqi@0 | 733 | @Override |
aoqi@0 | 734 | public void visitClassDef(JCClassDecl that) { |
aoqi@0 | 735 | TypeSymbol prevCurrentClass = currentClass; |
aoqi@0 | 736 | currentClass = that.sym; |
aoqi@0 | 737 | try { |
aoqi@0 | 738 | super.visitClassDef(that); |
aoqi@0 | 739 | } |
aoqi@0 | 740 | finally { |
aoqi@0 | 741 | currentClass = prevCurrentClass; |
aoqi@0 | 742 | } |
aoqi@0 | 743 | } |
aoqi@0 | 744 | }; |
aoqi@0 | 745 | |
aoqi@0 | 746 | /** Look up a synthetic name in a given scope. |
aoqi@0 | 747 | * @param s The scope. |
aoqi@0 | 748 | * @param name The name. |
aoqi@0 | 749 | */ |
aoqi@0 | 750 | private Symbol lookupSynthetic(Name name, Scope s) { |
aoqi@0 | 751 | Symbol sym = s.lookup(name).sym; |
aoqi@0 | 752 | return (sym==null || (sym.flags()&SYNTHETIC)==0) ? null : sym; |
aoqi@0 | 753 | } |
aoqi@0 | 754 | |
aoqi@0 | 755 | /** Look up a method in a given scope. |
aoqi@0 | 756 | */ |
aoqi@0 | 757 | private MethodSymbol lookupMethod(DiagnosticPosition pos, Name name, Type qual, List<Type> args) { |
aoqi@0 | 758 | return rs.resolveInternalMethod(pos, attrEnv, qual, name, args, List.<Type>nil()); |
aoqi@0 | 759 | } |
aoqi@0 | 760 | |
aoqi@0 | 761 | /** Look up a constructor. |
aoqi@0 | 762 | */ |
aoqi@0 | 763 | private MethodSymbol lookupConstructor(DiagnosticPosition pos, Type qual, List<Type> args) { |
aoqi@0 | 764 | return rs.resolveInternalConstructor(pos, attrEnv, qual, args, null); |
aoqi@0 | 765 | } |
aoqi@0 | 766 | |
aoqi@0 | 767 | /** Look up a field. |
aoqi@0 | 768 | */ |
aoqi@0 | 769 | private VarSymbol lookupField(DiagnosticPosition pos, Type qual, Name name) { |
aoqi@0 | 770 | return rs.resolveInternalField(pos, attrEnv, qual, name); |
aoqi@0 | 771 | } |
aoqi@0 | 772 | |
aoqi@0 | 773 | /** Anon inner classes are used as access constructor tags. |
aoqi@0 | 774 | * accessConstructorTag will use an existing anon class if one is available, |
aoqi@0 | 775 | * and synthethise a class (with makeEmptyClass) if one is not available. |
aoqi@0 | 776 | * However, there is a small possibility that an existing class will not |
aoqi@0 | 777 | * be generated as expected if it is inside a conditional with a constant |
aoqi@0 | 778 | * expression. If that is found to be the case, create an empty class tree here. |
aoqi@0 | 779 | */ |
aoqi@0 | 780 | private void checkAccessConstructorTags() { |
aoqi@0 | 781 | for (List<ClassSymbol> l = accessConstrTags; l.nonEmpty(); l = l.tail) { |
aoqi@0 | 782 | ClassSymbol c = l.head; |
aoqi@0 | 783 | if (isTranslatedClassAvailable(c)) |
aoqi@0 | 784 | continue; |
aoqi@0 | 785 | // Create class definition tree. |
aoqi@0 | 786 | JCClassDecl cdec = makeEmptyClass(STATIC | SYNTHETIC, |
aoqi@0 | 787 | c.outermostClass(), c.flatname, false); |
aoqi@0 | 788 | swapAccessConstructorTag(c, cdec.sym); |
aoqi@0 | 789 | translated.append(cdec); |
aoqi@0 | 790 | } |
aoqi@0 | 791 | } |
aoqi@0 | 792 | // where |
aoqi@0 | 793 | private boolean isTranslatedClassAvailable(ClassSymbol c) { |
aoqi@0 | 794 | for (JCTree tree: translated) { |
aoqi@0 | 795 | if (tree.hasTag(CLASSDEF) |
aoqi@0 | 796 | && ((JCClassDecl) tree).sym == c) { |
aoqi@0 | 797 | return true; |
aoqi@0 | 798 | } |
aoqi@0 | 799 | } |
aoqi@0 | 800 | return false; |
aoqi@0 | 801 | } |
aoqi@0 | 802 | |
aoqi@0 | 803 | void swapAccessConstructorTag(ClassSymbol oldCTag, ClassSymbol newCTag) { |
aoqi@0 | 804 | for (MethodSymbol methodSymbol : accessConstrs.values()) { |
aoqi@0 | 805 | Assert.check(methodSymbol.type.hasTag(METHOD)); |
aoqi@0 | 806 | MethodType oldMethodType = |
aoqi@0 | 807 | (MethodType)methodSymbol.type; |
aoqi@0 | 808 | if (oldMethodType.argtypes.head.tsym == oldCTag) |
aoqi@0 | 809 | methodSymbol.type = |
aoqi@0 | 810 | types.createMethodTypeWithParameters(oldMethodType, |
aoqi@0 | 811 | oldMethodType.getParameterTypes().tail |
aoqi@0 | 812 | .prepend(newCTag.erasure(types))); |
aoqi@0 | 813 | } |
aoqi@0 | 814 | } |
aoqi@0 | 815 | |
aoqi@0 | 816 | /************************************************************************** |
aoqi@0 | 817 | * Access methods |
aoqi@0 | 818 | *************************************************************************/ |
aoqi@0 | 819 | |
aoqi@0 | 820 | /** Access codes for dereferencing, assignment, |
aoqi@0 | 821 | * and pre/post increment/decrement. |
aoqi@0 | 822 | * Access codes for assignment operations are determined by method accessCode |
aoqi@0 | 823 | * below. |
aoqi@0 | 824 | * |
aoqi@0 | 825 | * All access codes for accesses to the current class are even. |
aoqi@0 | 826 | * If a member of the superclass should be accessed instead (because |
aoqi@0 | 827 | * access was via a qualified super), add one to the corresponding code |
aoqi@0 | 828 | * for the current class, making the number odd. |
aoqi@0 | 829 | * This numbering scheme is used by the backend to decide whether |
aoqi@0 | 830 | * to issue an invokevirtual or invokespecial call. |
aoqi@0 | 831 | * |
aoqi@0 | 832 | * @see Gen#visitSelect(JCFieldAccess tree) |
aoqi@0 | 833 | */ |
aoqi@0 | 834 | private static final int |
aoqi@0 | 835 | DEREFcode = 0, |
aoqi@0 | 836 | ASSIGNcode = 2, |
aoqi@0 | 837 | PREINCcode = 4, |
aoqi@0 | 838 | PREDECcode = 6, |
aoqi@0 | 839 | POSTINCcode = 8, |
aoqi@0 | 840 | POSTDECcode = 10, |
aoqi@0 | 841 | FIRSTASGOPcode = 12; |
aoqi@0 | 842 | |
aoqi@0 | 843 | /** Number of access codes |
aoqi@0 | 844 | */ |
aoqi@0 | 845 | private static final int NCODES = accessCode(ByteCodes.lushrl) + 2; |
aoqi@0 | 846 | |
aoqi@0 | 847 | /** A mapping from symbols to their access numbers. |
aoqi@0 | 848 | */ |
aoqi@0 | 849 | private Map<Symbol,Integer> accessNums; |
aoqi@0 | 850 | |
aoqi@0 | 851 | /** A mapping from symbols to an array of access symbols, indexed by |
aoqi@0 | 852 | * access code. |
aoqi@0 | 853 | */ |
aoqi@0 | 854 | private Map<Symbol,MethodSymbol[]> accessSyms; |
aoqi@0 | 855 | |
aoqi@0 | 856 | /** A mapping from (constructor) symbols to access constructor symbols. |
aoqi@0 | 857 | */ |
aoqi@0 | 858 | private Map<Symbol,MethodSymbol> accessConstrs; |
aoqi@0 | 859 | |
aoqi@0 | 860 | /** A list of all class symbols used for access constructor tags. |
aoqi@0 | 861 | */ |
aoqi@0 | 862 | private List<ClassSymbol> accessConstrTags; |
aoqi@0 | 863 | |
aoqi@0 | 864 | /** A queue for all accessed symbols. |
aoqi@0 | 865 | */ |
aoqi@0 | 866 | private ListBuffer<Symbol> accessed; |
aoqi@0 | 867 | |
aoqi@0 | 868 | /** Map bytecode of binary operation to access code of corresponding |
aoqi@0 | 869 | * assignment operation. This is always an even number. |
aoqi@0 | 870 | */ |
aoqi@0 | 871 | private static int accessCode(int bytecode) { |
aoqi@0 | 872 | if (ByteCodes.iadd <= bytecode && bytecode <= ByteCodes.lxor) |
aoqi@0 | 873 | return (bytecode - iadd) * 2 + FIRSTASGOPcode; |
aoqi@0 | 874 | else if (bytecode == ByteCodes.string_add) |
aoqi@0 | 875 | return (ByteCodes.lxor + 1 - iadd) * 2 + FIRSTASGOPcode; |
aoqi@0 | 876 | else if (ByteCodes.ishll <= bytecode && bytecode <= ByteCodes.lushrl) |
aoqi@0 | 877 | return (bytecode - ishll + ByteCodes.lxor + 2 - iadd) * 2 + FIRSTASGOPcode; |
aoqi@0 | 878 | else |
aoqi@0 | 879 | return -1; |
aoqi@0 | 880 | } |
aoqi@0 | 881 | |
aoqi@0 | 882 | /** return access code for identifier, |
aoqi@0 | 883 | * @param tree The tree representing the identifier use. |
aoqi@0 | 884 | * @param enclOp The closest enclosing operation node of tree, |
aoqi@0 | 885 | * null if tree is not a subtree of an operation. |
aoqi@0 | 886 | */ |
aoqi@0 | 887 | private static int accessCode(JCTree tree, JCTree enclOp) { |
aoqi@0 | 888 | if (enclOp == null) |
aoqi@0 | 889 | return DEREFcode; |
aoqi@0 | 890 | else if (enclOp.hasTag(ASSIGN) && |
aoqi@0 | 891 | tree == TreeInfo.skipParens(((JCAssign) enclOp).lhs)) |
aoqi@0 | 892 | return ASSIGNcode; |
aoqi@0 | 893 | else if (enclOp.getTag().isIncOrDecUnaryOp() && |
aoqi@0 | 894 | tree == TreeInfo.skipParens(((JCUnary) enclOp).arg)) |
aoqi@0 | 895 | return mapTagToUnaryOpCode(enclOp.getTag()); |
aoqi@0 | 896 | else if (enclOp.getTag().isAssignop() && |
aoqi@0 | 897 | tree == TreeInfo.skipParens(((JCAssignOp) enclOp).lhs)) |
aoqi@0 | 898 | return accessCode(((OperatorSymbol) ((JCAssignOp) enclOp).operator).opcode); |
aoqi@0 | 899 | else |
aoqi@0 | 900 | return DEREFcode; |
aoqi@0 | 901 | } |
aoqi@0 | 902 | |
aoqi@0 | 903 | /** Return binary operator that corresponds to given access code. |
aoqi@0 | 904 | */ |
aoqi@0 | 905 | private OperatorSymbol binaryAccessOperator(int acode) { |
aoqi@0 | 906 | for (Scope.Entry e = syms.predefClass.members().elems; |
aoqi@0 | 907 | e != null; |
aoqi@0 | 908 | e = e.sibling) { |
aoqi@0 | 909 | if (e.sym instanceof OperatorSymbol) { |
aoqi@0 | 910 | OperatorSymbol op = (OperatorSymbol)e.sym; |
aoqi@0 | 911 | if (accessCode(op.opcode) == acode) return op; |
aoqi@0 | 912 | } |
aoqi@0 | 913 | } |
aoqi@0 | 914 | return null; |
aoqi@0 | 915 | } |
aoqi@0 | 916 | |
aoqi@0 | 917 | /** Return tree tag for assignment operation corresponding |
aoqi@0 | 918 | * to given binary operator. |
aoqi@0 | 919 | */ |
aoqi@0 | 920 | private static JCTree.Tag treeTag(OperatorSymbol operator) { |
aoqi@0 | 921 | switch (operator.opcode) { |
aoqi@0 | 922 | case ByteCodes.ior: case ByteCodes.lor: |
aoqi@0 | 923 | return BITOR_ASG; |
aoqi@0 | 924 | case ByteCodes.ixor: case ByteCodes.lxor: |
aoqi@0 | 925 | return BITXOR_ASG; |
aoqi@0 | 926 | case ByteCodes.iand: case ByteCodes.land: |
aoqi@0 | 927 | return BITAND_ASG; |
aoqi@0 | 928 | case ByteCodes.ishl: case ByteCodes.lshl: |
aoqi@0 | 929 | case ByteCodes.ishll: case ByteCodes.lshll: |
aoqi@0 | 930 | return SL_ASG; |
aoqi@0 | 931 | case ByteCodes.ishr: case ByteCodes.lshr: |
aoqi@0 | 932 | case ByteCodes.ishrl: case ByteCodes.lshrl: |
aoqi@0 | 933 | return SR_ASG; |
aoqi@0 | 934 | case ByteCodes.iushr: case ByteCodes.lushr: |
aoqi@0 | 935 | case ByteCodes.iushrl: case ByteCodes.lushrl: |
aoqi@0 | 936 | return USR_ASG; |
aoqi@0 | 937 | case ByteCodes.iadd: case ByteCodes.ladd: |
aoqi@0 | 938 | case ByteCodes.fadd: case ByteCodes.dadd: |
aoqi@0 | 939 | case ByteCodes.string_add: |
aoqi@0 | 940 | return PLUS_ASG; |
aoqi@0 | 941 | case ByteCodes.isub: case ByteCodes.lsub: |
aoqi@0 | 942 | case ByteCodes.fsub: case ByteCodes.dsub: |
aoqi@0 | 943 | return MINUS_ASG; |
aoqi@0 | 944 | case ByteCodes.imul: case ByteCodes.lmul: |
aoqi@0 | 945 | case ByteCodes.fmul: case ByteCodes.dmul: |
aoqi@0 | 946 | return MUL_ASG; |
aoqi@0 | 947 | case ByteCodes.idiv: case ByteCodes.ldiv: |
aoqi@0 | 948 | case ByteCodes.fdiv: case ByteCodes.ddiv: |
aoqi@0 | 949 | return DIV_ASG; |
aoqi@0 | 950 | case ByteCodes.imod: case ByteCodes.lmod: |
aoqi@0 | 951 | case ByteCodes.fmod: case ByteCodes.dmod: |
aoqi@0 | 952 | return MOD_ASG; |
aoqi@0 | 953 | default: |
aoqi@0 | 954 | throw new AssertionError(); |
aoqi@0 | 955 | } |
aoqi@0 | 956 | } |
aoqi@0 | 957 | |
aoqi@0 | 958 | /** The name of the access method with number `anum' and access code `acode'. |
aoqi@0 | 959 | */ |
aoqi@0 | 960 | Name accessName(int anum, int acode) { |
aoqi@0 | 961 | return names.fromString( |
aoqi@0 | 962 | "access" + target.syntheticNameChar() + anum + acode / 10 + acode % 10); |
aoqi@0 | 963 | } |
aoqi@0 | 964 | |
aoqi@0 | 965 | /** Return access symbol for a private or protected symbol from an inner class. |
aoqi@0 | 966 | * @param sym The accessed private symbol. |
aoqi@0 | 967 | * @param tree The accessing tree. |
aoqi@0 | 968 | * @param enclOp The closest enclosing operation node of tree, |
aoqi@0 | 969 | * null if tree is not a subtree of an operation. |
aoqi@0 | 970 | * @param protAccess Is access to a protected symbol in another |
aoqi@0 | 971 | * package? |
aoqi@0 | 972 | * @param refSuper Is access via a (qualified) C.super? |
aoqi@0 | 973 | */ |
aoqi@0 | 974 | MethodSymbol accessSymbol(Symbol sym, JCTree tree, JCTree enclOp, |
aoqi@0 | 975 | boolean protAccess, boolean refSuper) { |
aoqi@0 | 976 | ClassSymbol accOwner = refSuper && protAccess |
aoqi@0 | 977 | // For access via qualified super (T.super.x), place the |
aoqi@0 | 978 | // access symbol on T. |
aoqi@0 | 979 | ? (ClassSymbol)((JCFieldAccess) tree).selected.type.tsym |
aoqi@0 | 980 | // Otherwise pretend that the owner of an accessed |
aoqi@0 | 981 | // protected symbol is the enclosing class of the current |
aoqi@0 | 982 | // class which is a subclass of the symbol's owner. |
aoqi@0 | 983 | : accessClass(sym, protAccess, tree); |
aoqi@0 | 984 | |
aoqi@0 | 985 | Symbol vsym = sym; |
aoqi@0 | 986 | if (sym.owner != accOwner) { |
aoqi@0 | 987 | vsym = sym.clone(accOwner); |
aoqi@0 | 988 | actualSymbols.put(vsym, sym); |
aoqi@0 | 989 | } |
aoqi@0 | 990 | |
aoqi@0 | 991 | Integer anum // The access number of the access method. |
aoqi@0 | 992 | = accessNums.get(vsym); |
aoqi@0 | 993 | if (anum == null) { |
aoqi@0 | 994 | anum = accessed.length(); |
aoqi@0 | 995 | accessNums.put(vsym, anum); |
aoqi@0 | 996 | accessSyms.put(vsym, new MethodSymbol[NCODES]); |
aoqi@0 | 997 | accessed.append(vsym); |
aoqi@0 | 998 | // System.out.println("accessing " + vsym + " in " + vsym.location()); |
aoqi@0 | 999 | } |
aoqi@0 | 1000 | |
aoqi@0 | 1001 | int acode; // The access code of the access method. |
aoqi@0 | 1002 | List<Type> argtypes; // The argument types of the access method. |
aoqi@0 | 1003 | Type restype; // The result type of the access method. |
aoqi@0 | 1004 | List<Type> thrown; // The thrown exceptions of the access method. |
aoqi@0 | 1005 | switch (vsym.kind) { |
aoqi@0 | 1006 | case VAR: |
aoqi@0 | 1007 | acode = accessCode(tree, enclOp); |
aoqi@0 | 1008 | if (acode >= FIRSTASGOPcode) { |
aoqi@0 | 1009 | OperatorSymbol operator = binaryAccessOperator(acode); |
aoqi@0 | 1010 | if (operator.opcode == string_add) |
aoqi@0 | 1011 | argtypes = List.of(syms.objectType); |
aoqi@0 | 1012 | else |
aoqi@0 | 1013 | argtypes = operator.type.getParameterTypes().tail; |
aoqi@0 | 1014 | } else if (acode == ASSIGNcode) |
aoqi@0 | 1015 | argtypes = List.of(vsym.erasure(types)); |
aoqi@0 | 1016 | else |
aoqi@0 | 1017 | argtypes = List.nil(); |
aoqi@0 | 1018 | restype = vsym.erasure(types); |
aoqi@0 | 1019 | thrown = List.nil(); |
aoqi@0 | 1020 | break; |
aoqi@0 | 1021 | case MTH: |
aoqi@0 | 1022 | acode = DEREFcode; |
aoqi@0 | 1023 | argtypes = vsym.erasure(types).getParameterTypes(); |
aoqi@0 | 1024 | restype = vsym.erasure(types).getReturnType(); |
aoqi@0 | 1025 | thrown = vsym.type.getThrownTypes(); |
aoqi@0 | 1026 | break; |
aoqi@0 | 1027 | default: |
aoqi@0 | 1028 | throw new AssertionError(); |
aoqi@0 | 1029 | } |
aoqi@0 | 1030 | |
aoqi@0 | 1031 | // For references via qualified super, increment acode by one, |
aoqi@0 | 1032 | // making it odd. |
aoqi@0 | 1033 | if (protAccess && refSuper) acode++; |
aoqi@0 | 1034 | |
aoqi@0 | 1035 | // Instance access methods get instance as first parameter. |
aoqi@0 | 1036 | // For protected symbols this needs to be the instance as a member |
aoqi@0 | 1037 | // of the type containing the accessed symbol, not the class |
aoqi@0 | 1038 | // containing the access method. |
aoqi@0 | 1039 | if ((vsym.flags() & STATIC) == 0) { |
aoqi@0 | 1040 | argtypes = argtypes.prepend(vsym.owner.erasure(types)); |
aoqi@0 | 1041 | } |
aoqi@0 | 1042 | MethodSymbol[] accessors = accessSyms.get(vsym); |
aoqi@0 | 1043 | MethodSymbol accessor = accessors[acode]; |
aoqi@0 | 1044 | if (accessor == null) { |
aoqi@0 | 1045 | accessor = new MethodSymbol( |
aoqi@0 | 1046 | STATIC | SYNTHETIC, |
aoqi@0 | 1047 | accessName(anum.intValue(), acode), |
aoqi@0 | 1048 | new MethodType(argtypes, restype, thrown, syms.methodClass), |
aoqi@0 | 1049 | accOwner); |
aoqi@0 | 1050 | enterSynthetic(tree.pos(), accessor, accOwner.members()); |
aoqi@0 | 1051 | accessors[acode] = accessor; |
aoqi@0 | 1052 | } |
aoqi@0 | 1053 | return accessor; |
aoqi@0 | 1054 | } |
aoqi@0 | 1055 | |
aoqi@0 | 1056 | /** The qualifier to be used for accessing a symbol in an outer class. |
aoqi@0 | 1057 | * This is either C.sym or C.this.sym, depending on whether or not |
aoqi@0 | 1058 | * sym is static. |
aoqi@0 | 1059 | * @param sym The accessed symbol. |
aoqi@0 | 1060 | */ |
aoqi@0 | 1061 | JCExpression accessBase(DiagnosticPosition pos, Symbol sym) { |
aoqi@0 | 1062 | return (sym.flags() & STATIC) != 0 |
aoqi@0 | 1063 | ? access(make.at(pos.getStartPosition()).QualIdent(sym.owner)) |
aoqi@0 | 1064 | : makeOwnerThis(pos, sym, true); |
aoqi@0 | 1065 | } |
aoqi@0 | 1066 | |
aoqi@0 | 1067 | /** Do we need an access method to reference private symbol? |
aoqi@0 | 1068 | */ |
aoqi@0 | 1069 | boolean needsPrivateAccess(Symbol sym) { |
aoqi@0 | 1070 | if ((sym.flags() & PRIVATE) == 0 || sym.owner == currentClass) { |
aoqi@0 | 1071 | return false; |
aoqi@0 | 1072 | } else if (sym.name == names.init && sym.owner.isLocal()) { |
aoqi@0 | 1073 | // private constructor in local class: relax protection |
aoqi@0 | 1074 | sym.flags_field &= ~PRIVATE; |
aoqi@0 | 1075 | return false; |
aoqi@0 | 1076 | } else { |
aoqi@0 | 1077 | return true; |
aoqi@0 | 1078 | } |
aoqi@0 | 1079 | } |
aoqi@0 | 1080 | |
aoqi@0 | 1081 | /** Do we need an access method to reference symbol in other package? |
aoqi@0 | 1082 | */ |
aoqi@0 | 1083 | boolean needsProtectedAccess(Symbol sym, JCTree tree) { |
aoqi@0 | 1084 | if ((sym.flags() & PROTECTED) == 0 || |
aoqi@0 | 1085 | sym.owner.owner == currentClass.owner || // fast special case |
aoqi@0 | 1086 | sym.packge() == currentClass.packge()) |
aoqi@0 | 1087 | return false; |
aoqi@0 | 1088 | if (!currentClass.isSubClass(sym.owner, types)) |
aoqi@0 | 1089 | return true; |
aoqi@0 | 1090 | if ((sym.flags() & STATIC) != 0 || |
aoqi@0 | 1091 | !tree.hasTag(SELECT) || |
aoqi@0 | 1092 | TreeInfo.name(((JCFieldAccess) tree).selected) == names._super) |
aoqi@0 | 1093 | return false; |
aoqi@0 | 1094 | return !((JCFieldAccess) tree).selected.type.tsym.isSubClass(currentClass, types); |
aoqi@0 | 1095 | } |
aoqi@0 | 1096 | |
aoqi@0 | 1097 | /** The class in which an access method for given symbol goes. |
aoqi@0 | 1098 | * @param sym The access symbol |
aoqi@0 | 1099 | * @param protAccess Is access to a protected symbol in another |
aoqi@0 | 1100 | * package? |
aoqi@0 | 1101 | */ |
aoqi@0 | 1102 | ClassSymbol accessClass(Symbol sym, boolean protAccess, JCTree tree) { |
aoqi@0 | 1103 | if (protAccess) { |
aoqi@0 | 1104 | Symbol qualifier = null; |
aoqi@0 | 1105 | ClassSymbol c = currentClass; |
aoqi@0 | 1106 | if (tree.hasTag(SELECT) && (sym.flags() & STATIC) == 0) { |
aoqi@0 | 1107 | qualifier = ((JCFieldAccess) tree).selected.type.tsym; |
aoqi@0 | 1108 | while (!qualifier.isSubClass(c, types)) { |
aoqi@0 | 1109 | c = c.owner.enclClass(); |
aoqi@0 | 1110 | } |
aoqi@0 | 1111 | return c; |
aoqi@0 | 1112 | } else { |
aoqi@0 | 1113 | while (!c.isSubClass(sym.owner, types)) { |
aoqi@0 | 1114 | c = c.owner.enclClass(); |
aoqi@0 | 1115 | } |
aoqi@0 | 1116 | } |
aoqi@0 | 1117 | return c; |
aoqi@0 | 1118 | } else { |
aoqi@0 | 1119 | // the symbol is private |
aoqi@0 | 1120 | return sym.owner.enclClass(); |
aoqi@0 | 1121 | } |
aoqi@0 | 1122 | } |
aoqi@0 | 1123 | |
aoqi@0 | 1124 | private void addPrunedInfo(JCTree tree) { |
aoqi@0 | 1125 | List<JCTree> infoList = prunedTree.get(currentClass); |
aoqi@0 | 1126 | infoList = (infoList == null) ? List.of(tree) : infoList.prepend(tree); |
aoqi@0 | 1127 | prunedTree.put(currentClass, infoList); |
aoqi@0 | 1128 | } |
aoqi@0 | 1129 | |
aoqi@0 | 1130 | /** Ensure that identifier is accessible, return tree accessing the identifier. |
aoqi@0 | 1131 | * @param sym The accessed symbol. |
aoqi@0 | 1132 | * @param tree The tree referring to the symbol. |
aoqi@0 | 1133 | * @param enclOp The closest enclosing operation node of tree, |
aoqi@0 | 1134 | * null if tree is not a subtree of an operation. |
aoqi@0 | 1135 | * @param refSuper Is access via a (qualified) C.super? |
aoqi@0 | 1136 | */ |
aoqi@0 | 1137 | JCExpression access(Symbol sym, JCExpression tree, JCExpression enclOp, boolean refSuper) { |
aoqi@0 | 1138 | // Access a free variable via its proxy, or its proxy's proxy |
aoqi@0 | 1139 | while (sym.kind == VAR && sym.owner.kind == MTH && |
aoqi@0 | 1140 | sym.owner.enclClass() != currentClass) { |
aoqi@0 | 1141 | // A constant is replaced by its constant value. |
aoqi@0 | 1142 | Object cv = ((VarSymbol)sym).getConstValue(); |
aoqi@0 | 1143 | if (cv != null) { |
aoqi@0 | 1144 | make.at(tree.pos); |
aoqi@0 | 1145 | return makeLit(sym.type, cv); |
aoqi@0 | 1146 | } |
aoqi@0 | 1147 | // Otherwise replace the variable by its proxy. |
aoqi@0 | 1148 | sym = proxies.lookup(proxyName(sym.name)).sym; |
aoqi@0 | 1149 | Assert.check(sym != null && (sym.flags_field & FINAL) != 0); |
aoqi@0 | 1150 | tree = make.at(tree.pos).Ident(sym); |
aoqi@0 | 1151 | } |
aoqi@0 | 1152 | JCExpression base = (tree.hasTag(SELECT)) ? ((JCFieldAccess) tree).selected : null; |
aoqi@0 | 1153 | switch (sym.kind) { |
aoqi@0 | 1154 | case TYP: |
aoqi@0 | 1155 | if (sym.owner.kind != PCK) { |
aoqi@0 | 1156 | // Convert type idents to |
aoqi@0 | 1157 | // <flat name> or <package name> . <flat name> |
aoqi@0 | 1158 | Name flatname = Convert.shortName(sym.flatName()); |
aoqi@0 | 1159 | while (base != null && |
aoqi@0 | 1160 | TreeInfo.symbol(base) != null && |
aoqi@0 | 1161 | TreeInfo.symbol(base).kind != PCK) { |
aoqi@0 | 1162 | base = (base.hasTag(SELECT)) |
aoqi@0 | 1163 | ? ((JCFieldAccess) base).selected |
aoqi@0 | 1164 | : null; |
aoqi@0 | 1165 | } |
aoqi@0 | 1166 | if (tree.hasTag(IDENT)) { |
aoqi@0 | 1167 | ((JCIdent) tree).name = flatname; |
aoqi@0 | 1168 | } else if (base == null) { |
aoqi@0 | 1169 | tree = make.at(tree.pos).Ident(sym); |
aoqi@0 | 1170 | ((JCIdent) tree).name = flatname; |
aoqi@0 | 1171 | } else { |
aoqi@0 | 1172 | ((JCFieldAccess) tree).selected = base; |
aoqi@0 | 1173 | ((JCFieldAccess) tree).name = flatname; |
aoqi@0 | 1174 | } |
aoqi@0 | 1175 | } |
aoqi@0 | 1176 | break; |
aoqi@0 | 1177 | case MTH: case VAR: |
aoqi@0 | 1178 | if (sym.owner.kind == TYP) { |
aoqi@0 | 1179 | |
aoqi@0 | 1180 | // Access methods are required for |
aoqi@0 | 1181 | // - private members, |
aoqi@0 | 1182 | // - protected members in a superclass of an |
aoqi@0 | 1183 | // enclosing class contained in another package. |
aoqi@0 | 1184 | // - all non-private members accessed via a qualified super. |
aoqi@0 | 1185 | boolean protAccess = refSuper && !needsPrivateAccess(sym) |
aoqi@0 | 1186 | || needsProtectedAccess(sym, tree); |
aoqi@0 | 1187 | boolean accReq = protAccess || needsPrivateAccess(sym); |
aoqi@0 | 1188 | |
aoqi@0 | 1189 | // A base has to be supplied for |
aoqi@0 | 1190 | // - simple identifiers accessing variables in outer classes. |
aoqi@0 | 1191 | boolean baseReq = |
aoqi@0 | 1192 | base == null && |
aoqi@0 | 1193 | sym.owner != syms.predefClass && |
aoqi@0 | 1194 | !sym.isMemberOf(currentClass, types); |
aoqi@0 | 1195 | |
aoqi@0 | 1196 | if (accReq || baseReq) { |
aoqi@0 | 1197 | make.at(tree.pos); |
aoqi@0 | 1198 | |
aoqi@0 | 1199 | // Constants are replaced by their constant value. |
aoqi@0 | 1200 | if (sym.kind == VAR) { |
aoqi@0 | 1201 | Object cv = ((VarSymbol)sym).getConstValue(); |
aoqi@0 | 1202 | if (cv != null) { |
aoqi@0 | 1203 | addPrunedInfo(tree); |
aoqi@0 | 1204 | return makeLit(sym.type, cv); |
aoqi@0 | 1205 | } |
aoqi@0 | 1206 | } |
aoqi@0 | 1207 | |
aoqi@0 | 1208 | // Private variables and methods are replaced by calls |
aoqi@0 | 1209 | // to their access methods. |
aoqi@0 | 1210 | if (accReq) { |
aoqi@0 | 1211 | List<JCExpression> args = List.nil(); |
aoqi@0 | 1212 | if ((sym.flags() & STATIC) == 0) { |
aoqi@0 | 1213 | // Instance access methods get instance |
aoqi@0 | 1214 | // as first parameter. |
aoqi@0 | 1215 | if (base == null) |
aoqi@0 | 1216 | base = makeOwnerThis(tree.pos(), sym, true); |
aoqi@0 | 1217 | args = args.prepend(base); |
aoqi@0 | 1218 | base = null; // so we don't duplicate code |
aoqi@0 | 1219 | } |
aoqi@0 | 1220 | Symbol access = accessSymbol(sym, tree, |
aoqi@0 | 1221 | enclOp, protAccess, |
aoqi@0 | 1222 | refSuper); |
aoqi@0 | 1223 | JCExpression receiver = make.Select( |
aoqi@0 | 1224 | base != null ? base : make.QualIdent(access.owner), |
aoqi@0 | 1225 | access); |
aoqi@0 | 1226 | return make.App(receiver, args); |
aoqi@0 | 1227 | |
aoqi@0 | 1228 | // Other accesses to members of outer classes get a |
aoqi@0 | 1229 | // qualifier. |
aoqi@0 | 1230 | } else if (baseReq) { |
aoqi@0 | 1231 | return make.at(tree.pos).Select( |
aoqi@0 | 1232 | accessBase(tree.pos(), sym), sym).setType(tree.type); |
aoqi@0 | 1233 | } |
aoqi@0 | 1234 | } |
aoqi@0 | 1235 | } else if (sym.owner.kind == MTH && lambdaTranslationMap != null) { |
aoqi@0 | 1236 | //sym is a local variable - check the lambda translation map to |
aoqi@0 | 1237 | //see if sym has been translated to something else in the current |
aoqi@0 | 1238 | //scope (by LambdaToMethod) |
aoqi@0 | 1239 | Symbol translatedSym = lambdaTranslationMap.get(sym); |
aoqi@0 | 1240 | if (translatedSym != null) { |
aoqi@0 | 1241 | tree = make.at(tree.pos).Ident(translatedSym); |
aoqi@0 | 1242 | } |
aoqi@0 | 1243 | } |
aoqi@0 | 1244 | } |
aoqi@0 | 1245 | return tree; |
aoqi@0 | 1246 | } |
aoqi@0 | 1247 | |
aoqi@0 | 1248 | /** Ensure that identifier is accessible, return tree accessing the identifier. |
aoqi@0 | 1249 | * @param tree The identifier tree. |
aoqi@0 | 1250 | */ |
aoqi@0 | 1251 | JCExpression access(JCExpression tree) { |
aoqi@0 | 1252 | Symbol sym = TreeInfo.symbol(tree); |
aoqi@0 | 1253 | return sym == null ? tree : access(sym, tree, null, false); |
aoqi@0 | 1254 | } |
aoqi@0 | 1255 | |
aoqi@0 | 1256 | /** Return access constructor for a private constructor, |
aoqi@0 | 1257 | * or the constructor itself, if no access constructor is needed. |
aoqi@0 | 1258 | * @param pos The position to report diagnostics, if any. |
aoqi@0 | 1259 | * @param constr The private constructor. |
aoqi@0 | 1260 | */ |
aoqi@0 | 1261 | Symbol accessConstructor(DiagnosticPosition pos, Symbol constr) { |
aoqi@0 | 1262 | if (needsPrivateAccess(constr)) { |
aoqi@0 | 1263 | ClassSymbol accOwner = constr.owner.enclClass(); |
aoqi@0 | 1264 | MethodSymbol aconstr = accessConstrs.get(constr); |
aoqi@0 | 1265 | if (aconstr == null) { |
aoqi@0 | 1266 | List<Type> argtypes = constr.type.getParameterTypes(); |
aoqi@0 | 1267 | if ((accOwner.flags_field & ENUM) != 0) |
aoqi@0 | 1268 | argtypes = argtypes |
aoqi@0 | 1269 | .prepend(syms.intType) |
aoqi@0 | 1270 | .prepend(syms.stringType); |
aoqi@0 | 1271 | aconstr = new MethodSymbol( |
aoqi@0 | 1272 | SYNTHETIC, |
aoqi@0 | 1273 | names.init, |
aoqi@0 | 1274 | new MethodType( |
aoqi@0 | 1275 | argtypes.append( |
aoqi@0 | 1276 | accessConstructorTag().erasure(types)), |
aoqi@0 | 1277 | constr.type.getReturnType(), |
aoqi@0 | 1278 | constr.type.getThrownTypes(), |
aoqi@0 | 1279 | syms.methodClass), |
aoqi@0 | 1280 | accOwner); |
aoqi@0 | 1281 | enterSynthetic(pos, aconstr, accOwner.members()); |
aoqi@0 | 1282 | accessConstrs.put(constr, aconstr); |
aoqi@0 | 1283 | accessed.append(constr); |
aoqi@0 | 1284 | } |
aoqi@0 | 1285 | return aconstr; |
aoqi@0 | 1286 | } else { |
aoqi@0 | 1287 | return constr; |
aoqi@0 | 1288 | } |
aoqi@0 | 1289 | } |
aoqi@0 | 1290 | |
aoqi@0 | 1291 | /** Return an anonymous class nested in this toplevel class. |
aoqi@0 | 1292 | */ |
aoqi@0 | 1293 | ClassSymbol accessConstructorTag() { |
aoqi@0 | 1294 | ClassSymbol topClass = currentClass.outermostClass(); |
aoqi@0 | 1295 | Name flatname = names.fromString("" + topClass.getQualifiedName() + |
aoqi@0 | 1296 | target.syntheticNameChar() + |
aoqi@0 | 1297 | "1"); |
aoqi@0 | 1298 | ClassSymbol ctag = chk.compiled.get(flatname); |
aoqi@0 | 1299 | if (ctag == null) |
aoqi@0 | 1300 | ctag = makeEmptyClass(STATIC | SYNTHETIC, topClass).sym; |
aoqi@0 | 1301 | // keep a record of all tags, to verify that all are generated as required |
aoqi@0 | 1302 | accessConstrTags = accessConstrTags.prepend(ctag); |
aoqi@0 | 1303 | return ctag; |
aoqi@0 | 1304 | } |
aoqi@0 | 1305 | |
aoqi@0 | 1306 | /** Add all required access methods for a private symbol to enclosing class. |
aoqi@0 | 1307 | * @param sym The symbol. |
aoqi@0 | 1308 | */ |
aoqi@0 | 1309 | void makeAccessible(Symbol sym) { |
aoqi@0 | 1310 | JCClassDecl cdef = classDef(sym.owner.enclClass()); |
aoqi@0 | 1311 | if (cdef == null) Assert.error("class def not found: " + sym + " in " + sym.owner); |
aoqi@0 | 1312 | if (sym.name == names.init) { |
aoqi@0 | 1313 | cdef.defs = cdef.defs.prepend( |
aoqi@0 | 1314 | accessConstructorDef(cdef.pos, sym, accessConstrs.get(sym))); |
aoqi@0 | 1315 | } else { |
aoqi@0 | 1316 | MethodSymbol[] accessors = accessSyms.get(sym); |
aoqi@0 | 1317 | for (int i = 0; i < NCODES; i++) { |
aoqi@0 | 1318 | if (accessors[i] != null) |
aoqi@0 | 1319 | cdef.defs = cdef.defs.prepend( |
aoqi@0 | 1320 | accessDef(cdef.pos, sym, accessors[i], i)); |
aoqi@0 | 1321 | } |
aoqi@0 | 1322 | } |
aoqi@0 | 1323 | } |
aoqi@0 | 1324 | |
aoqi@0 | 1325 | /** Maps unary operator integer codes to JCTree.Tag objects |
aoqi@0 | 1326 | * @param unaryOpCode the unary operator code |
aoqi@0 | 1327 | */ |
aoqi@0 | 1328 | private static Tag mapUnaryOpCodeToTag(int unaryOpCode){ |
aoqi@0 | 1329 | switch (unaryOpCode){ |
aoqi@0 | 1330 | case PREINCcode: |
aoqi@0 | 1331 | return PREINC; |
aoqi@0 | 1332 | case PREDECcode: |
aoqi@0 | 1333 | return PREDEC; |
aoqi@0 | 1334 | case POSTINCcode: |
aoqi@0 | 1335 | return POSTINC; |
aoqi@0 | 1336 | case POSTDECcode: |
aoqi@0 | 1337 | return POSTDEC; |
aoqi@0 | 1338 | default: |
aoqi@0 | 1339 | return NO_TAG; |
aoqi@0 | 1340 | } |
aoqi@0 | 1341 | } |
aoqi@0 | 1342 | |
aoqi@0 | 1343 | /** Maps JCTree.Tag objects to unary operator integer codes |
aoqi@0 | 1344 | * @param tag the JCTree.Tag |
aoqi@0 | 1345 | */ |
aoqi@0 | 1346 | private static int mapTagToUnaryOpCode(Tag tag){ |
aoqi@0 | 1347 | switch (tag){ |
aoqi@0 | 1348 | case PREINC: |
aoqi@0 | 1349 | return PREINCcode; |
aoqi@0 | 1350 | case PREDEC: |
aoqi@0 | 1351 | return PREDECcode; |
aoqi@0 | 1352 | case POSTINC: |
aoqi@0 | 1353 | return POSTINCcode; |
aoqi@0 | 1354 | case POSTDEC: |
aoqi@0 | 1355 | return POSTDECcode; |
aoqi@0 | 1356 | default: |
aoqi@0 | 1357 | return -1; |
aoqi@0 | 1358 | } |
aoqi@0 | 1359 | } |
aoqi@0 | 1360 | |
aoqi@0 | 1361 | /** Construct definition of an access method. |
aoqi@0 | 1362 | * @param pos The source code position of the definition. |
aoqi@0 | 1363 | * @param vsym The private or protected symbol. |
aoqi@0 | 1364 | * @param accessor The access method for the symbol. |
aoqi@0 | 1365 | * @param acode The access code. |
aoqi@0 | 1366 | */ |
aoqi@0 | 1367 | JCTree accessDef(int pos, Symbol vsym, MethodSymbol accessor, int acode) { |
aoqi@0 | 1368 | // System.err.println("access " + vsym + " with " + accessor);//DEBUG |
aoqi@0 | 1369 | currentClass = vsym.owner.enclClass(); |
aoqi@0 | 1370 | make.at(pos); |
aoqi@0 | 1371 | JCMethodDecl md = make.MethodDef(accessor, null); |
aoqi@0 | 1372 | |
aoqi@0 | 1373 | // Find actual symbol |
aoqi@0 | 1374 | Symbol sym = actualSymbols.get(vsym); |
aoqi@0 | 1375 | if (sym == null) sym = vsym; |
aoqi@0 | 1376 | |
aoqi@0 | 1377 | JCExpression ref; // The tree referencing the private symbol. |
aoqi@0 | 1378 | List<JCExpression> args; // Any additional arguments to be passed along. |
aoqi@0 | 1379 | if ((sym.flags() & STATIC) != 0) { |
aoqi@0 | 1380 | ref = make.Ident(sym); |
aoqi@0 | 1381 | args = make.Idents(md.params); |
aoqi@0 | 1382 | } else { |
aoqi@0 | 1383 | JCExpression site = make.Ident(md.params.head); |
aoqi@0 | 1384 | if (acode % 2 != 0) { |
aoqi@0 | 1385 | //odd access codes represent qualified super accesses - need to |
aoqi@0 | 1386 | //emit reference to the direct superclass, even if the refered |
aoqi@0 | 1387 | //member is from an indirect superclass (JLS 13.1) |
aoqi@0 | 1388 | site.setType(types.erasure(types.supertype(vsym.owner.enclClass().type))); |
aoqi@0 | 1389 | } |
aoqi@0 | 1390 | ref = make.Select(site, sym); |
aoqi@0 | 1391 | args = make.Idents(md.params.tail); |
aoqi@0 | 1392 | } |
aoqi@0 | 1393 | JCStatement stat; // The statement accessing the private symbol. |
aoqi@0 | 1394 | if (sym.kind == VAR) { |
aoqi@0 | 1395 | // Normalize out all odd access codes by taking floor modulo 2: |
aoqi@0 | 1396 | int acode1 = acode - (acode & 1); |
aoqi@0 | 1397 | |
aoqi@0 | 1398 | JCExpression expr; // The access method's return value. |
aoqi@0 | 1399 | switch (acode1) { |
aoqi@0 | 1400 | case DEREFcode: |
aoqi@0 | 1401 | expr = ref; |
aoqi@0 | 1402 | break; |
aoqi@0 | 1403 | case ASSIGNcode: |
aoqi@0 | 1404 | expr = make.Assign(ref, args.head); |
aoqi@0 | 1405 | break; |
aoqi@0 | 1406 | case PREINCcode: case POSTINCcode: case PREDECcode: case POSTDECcode: |
aoqi@0 | 1407 | expr = makeUnary(mapUnaryOpCodeToTag(acode1), ref); |
aoqi@0 | 1408 | break; |
aoqi@0 | 1409 | default: |
aoqi@0 | 1410 | expr = make.Assignop( |
aoqi@0 | 1411 | treeTag(binaryAccessOperator(acode1)), ref, args.head); |
aoqi@0 | 1412 | ((JCAssignOp) expr).operator = binaryAccessOperator(acode1); |
aoqi@0 | 1413 | } |
aoqi@0 | 1414 | stat = make.Return(expr.setType(sym.type)); |
aoqi@0 | 1415 | } else { |
aoqi@0 | 1416 | stat = make.Call(make.App(ref, args)); |
aoqi@0 | 1417 | } |
aoqi@0 | 1418 | md.body = make.Block(0, List.of(stat)); |
aoqi@0 | 1419 | |
aoqi@0 | 1420 | // Make sure all parameters, result types and thrown exceptions |
aoqi@0 | 1421 | // are accessible. |
aoqi@0 | 1422 | for (List<JCVariableDecl> l = md.params; l.nonEmpty(); l = l.tail) |
aoqi@0 | 1423 | l.head.vartype = access(l.head.vartype); |
aoqi@0 | 1424 | md.restype = access(md.restype); |
aoqi@0 | 1425 | for (List<JCExpression> l = md.thrown; l.nonEmpty(); l = l.tail) |
aoqi@0 | 1426 | l.head = access(l.head); |
aoqi@0 | 1427 | |
aoqi@0 | 1428 | return md; |
aoqi@0 | 1429 | } |
aoqi@0 | 1430 | |
aoqi@0 | 1431 | /** Construct definition of an access constructor. |
aoqi@0 | 1432 | * @param pos The source code position of the definition. |
aoqi@0 | 1433 | * @param constr The private constructor. |
aoqi@0 | 1434 | * @param accessor The access method for the constructor. |
aoqi@0 | 1435 | */ |
aoqi@0 | 1436 | JCTree accessConstructorDef(int pos, Symbol constr, MethodSymbol accessor) { |
aoqi@0 | 1437 | make.at(pos); |
aoqi@0 | 1438 | JCMethodDecl md = make.MethodDef(accessor, |
aoqi@0 | 1439 | accessor.externalType(types), |
aoqi@0 | 1440 | null); |
aoqi@0 | 1441 | JCIdent callee = make.Ident(names._this); |
aoqi@0 | 1442 | callee.sym = constr; |
aoqi@0 | 1443 | callee.type = constr.type; |
aoqi@0 | 1444 | md.body = |
aoqi@0 | 1445 | make.Block(0, List.<JCStatement>of( |
aoqi@0 | 1446 | make.Call( |
aoqi@0 | 1447 | make.App( |
aoqi@0 | 1448 | callee, |
aoqi@0 | 1449 | make.Idents(md.params.reverse().tail.reverse()))))); |
aoqi@0 | 1450 | return md; |
aoqi@0 | 1451 | } |
aoqi@0 | 1452 | |
aoqi@0 | 1453 | /************************************************************************** |
aoqi@0 | 1454 | * Free variables proxies and this$n |
aoqi@0 | 1455 | *************************************************************************/ |
aoqi@0 | 1456 | |
aoqi@0 | 1457 | /** A scope containing all free variable proxies for currently translated |
aoqi@0 | 1458 | * class, as well as its this$n symbol (if needed). |
aoqi@0 | 1459 | * Proxy scopes are nested in the same way classes are. |
aoqi@0 | 1460 | * Inside a constructor, proxies and any this$n symbol are duplicated |
aoqi@0 | 1461 | * in an additional innermost scope, where they represent the constructor |
aoqi@0 | 1462 | * parameters. |
aoqi@0 | 1463 | */ |
aoqi@0 | 1464 | Scope proxies; |
aoqi@0 | 1465 | |
aoqi@0 | 1466 | /** A scope containing all unnamed resource variables/saved |
aoqi@0 | 1467 | * exception variables for translated TWR blocks |
aoqi@0 | 1468 | */ |
aoqi@0 | 1469 | Scope twrVars; |
aoqi@0 | 1470 | |
aoqi@0 | 1471 | /** A stack containing the this$n field of the currently translated |
aoqi@0 | 1472 | * classes (if needed) in innermost first order. |
aoqi@0 | 1473 | * Inside a constructor, proxies and any this$n symbol are duplicated |
aoqi@0 | 1474 | * in an additional innermost scope, where they represent the constructor |
aoqi@0 | 1475 | * parameters. |
aoqi@0 | 1476 | */ |
aoqi@0 | 1477 | List<VarSymbol> outerThisStack; |
aoqi@0 | 1478 | |
aoqi@0 | 1479 | /** The name of a free variable proxy. |
aoqi@0 | 1480 | */ |
aoqi@0 | 1481 | Name proxyName(Name name) { |
aoqi@0 | 1482 | return names.fromString("val" + target.syntheticNameChar() + name); |
aoqi@0 | 1483 | } |
aoqi@0 | 1484 | |
aoqi@0 | 1485 | /** Proxy definitions for all free variables in given list, in reverse order. |
aoqi@0 | 1486 | * @param pos The source code position of the definition. |
aoqi@0 | 1487 | * @param freevars The free variables. |
aoqi@0 | 1488 | * @param owner The class in which the definitions go. |
aoqi@0 | 1489 | */ |
aoqi@0 | 1490 | List<JCVariableDecl> freevarDefs(int pos, List<VarSymbol> freevars, Symbol owner) { |
aoqi@0 | 1491 | return freevarDefs(pos, freevars, owner, 0); |
aoqi@0 | 1492 | } |
aoqi@0 | 1493 | |
aoqi@0 | 1494 | List<JCVariableDecl> freevarDefs(int pos, List<VarSymbol> freevars, Symbol owner, |
aoqi@0 | 1495 | long additionalFlags) { |
aoqi@0 | 1496 | long flags = FINAL | SYNTHETIC | additionalFlags; |
aoqi@0 | 1497 | if (owner.kind == TYP && |
aoqi@0 | 1498 | target.usePrivateSyntheticFields()) |
aoqi@0 | 1499 | flags |= PRIVATE; |
aoqi@0 | 1500 | List<JCVariableDecl> defs = List.nil(); |
aoqi@0 | 1501 | for (List<VarSymbol> l = freevars; l.nonEmpty(); l = l.tail) { |
aoqi@0 | 1502 | VarSymbol v = l.head; |
aoqi@0 | 1503 | VarSymbol proxy = new VarSymbol( |
aoqi@0 | 1504 | flags, proxyName(v.name), v.erasure(types), owner); |
aoqi@0 | 1505 | proxies.enter(proxy); |
aoqi@0 | 1506 | JCVariableDecl vd = make.at(pos).VarDef(proxy, null); |
aoqi@0 | 1507 | vd.vartype = access(vd.vartype); |
aoqi@0 | 1508 | defs = defs.prepend(vd); |
aoqi@0 | 1509 | } |
aoqi@0 | 1510 | return defs; |
aoqi@0 | 1511 | } |
aoqi@0 | 1512 | |
aoqi@0 | 1513 | /** The name of a this$n field |
aoqi@0 | 1514 | * @param type The class referenced by the this$n field |
aoqi@0 | 1515 | */ |
aoqi@0 | 1516 | Name outerThisName(Type type, Symbol owner) { |
aoqi@0 | 1517 | Type t = type.getEnclosingType(); |
aoqi@0 | 1518 | int nestingLevel = 0; |
aoqi@0 | 1519 | while (t.hasTag(CLASS)) { |
aoqi@0 | 1520 | t = t.getEnclosingType(); |
aoqi@0 | 1521 | nestingLevel++; |
aoqi@0 | 1522 | } |
aoqi@0 | 1523 | Name result = names.fromString("this" + target.syntheticNameChar() + nestingLevel); |
aoqi@0 | 1524 | while (owner.kind == TYP && ((ClassSymbol)owner).members().lookup(result).scope != null) |
aoqi@0 | 1525 | result = names.fromString(result.toString() + target.syntheticNameChar()); |
aoqi@0 | 1526 | return result; |
aoqi@0 | 1527 | } |
aoqi@0 | 1528 | |
aoqi@0 | 1529 | private VarSymbol makeOuterThisVarSymbol(Symbol owner, long flags) { |
aoqi@0 | 1530 | if (owner.kind == TYP && |
aoqi@0 | 1531 | target.usePrivateSyntheticFields()) |
aoqi@0 | 1532 | flags |= PRIVATE; |
aoqi@0 | 1533 | Type target = types.erasure(owner.enclClass().type.getEnclosingType()); |
aoqi@0 | 1534 | VarSymbol outerThis = |
aoqi@0 | 1535 | new VarSymbol(flags, outerThisName(target, owner), target, owner); |
aoqi@0 | 1536 | outerThisStack = outerThisStack.prepend(outerThis); |
aoqi@0 | 1537 | return outerThis; |
aoqi@0 | 1538 | } |
aoqi@0 | 1539 | |
aoqi@0 | 1540 | private JCVariableDecl makeOuterThisVarDecl(int pos, VarSymbol sym) { |
aoqi@0 | 1541 | JCVariableDecl vd = make.at(pos).VarDef(sym, null); |
aoqi@0 | 1542 | vd.vartype = access(vd.vartype); |
aoqi@0 | 1543 | return vd; |
aoqi@0 | 1544 | } |
aoqi@0 | 1545 | |
aoqi@0 | 1546 | /** Definition for this$n field. |
aoqi@0 | 1547 | * @param pos The source code position of the definition. |
aoqi@0 | 1548 | * @param owner The method in which the definition goes. |
aoqi@0 | 1549 | */ |
aoqi@0 | 1550 | JCVariableDecl outerThisDef(int pos, MethodSymbol owner) { |
aoqi@0 | 1551 | ClassSymbol c = owner.enclClass(); |
aoqi@0 | 1552 | boolean isMandated = |
aoqi@0 | 1553 | // Anonymous constructors |
aoqi@0 | 1554 | (owner.isConstructor() && owner.isAnonymous()) || |
aoqi@0 | 1555 | // Constructors of non-private inner member classes |
aoqi@0 | 1556 | (owner.isConstructor() && c.isInner() && |
aoqi@0 | 1557 | !c.isPrivate() && !c.isStatic()); |
aoqi@0 | 1558 | long flags = |
aoqi@0 | 1559 | FINAL | (isMandated ? MANDATED : SYNTHETIC) | PARAMETER; |
aoqi@0 | 1560 | VarSymbol outerThis = makeOuterThisVarSymbol(owner, flags); |
aoqi@0 | 1561 | owner.extraParams = owner.extraParams.prepend(outerThis); |
aoqi@0 | 1562 | return makeOuterThisVarDecl(pos, outerThis); |
aoqi@0 | 1563 | } |
aoqi@0 | 1564 | |
aoqi@0 | 1565 | /** Definition for this$n field. |
aoqi@0 | 1566 | * @param pos The source code position of the definition. |
aoqi@0 | 1567 | * @param owner The class in which the definition goes. |
aoqi@0 | 1568 | */ |
aoqi@0 | 1569 | JCVariableDecl outerThisDef(int pos, ClassSymbol owner) { |
aoqi@0 | 1570 | VarSymbol outerThis = makeOuterThisVarSymbol(owner, FINAL | SYNTHETIC); |
aoqi@0 | 1571 | return makeOuterThisVarDecl(pos, outerThis); |
aoqi@0 | 1572 | } |
aoqi@0 | 1573 | |
aoqi@0 | 1574 | /** Return a list of trees that load the free variables in given list, |
aoqi@0 | 1575 | * in reverse order. |
aoqi@0 | 1576 | * @param pos The source code position to be used for the trees. |
aoqi@0 | 1577 | * @param freevars The list of free variables. |
aoqi@0 | 1578 | */ |
aoqi@0 | 1579 | List<JCExpression> loadFreevars(DiagnosticPosition pos, List<VarSymbol> freevars) { |
aoqi@0 | 1580 | List<JCExpression> args = List.nil(); |
aoqi@0 | 1581 | for (List<VarSymbol> l = freevars; l.nonEmpty(); l = l.tail) |
aoqi@0 | 1582 | args = args.prepend(loadFreevar(pos, l.head)); |
aoqi@0 | 1583 | return args; |
aoqi@0 | 1584 | } |
aoqi@0 | 1585 | //where |
aoqi@0 | 1586 | JCExpression loadFreevar(DiagnosticPosition pos, VarSymbol v) { |
aoqi@0 | 1587 | return access(v, make.at(pos).Ident(v), null, false); |
aoqi@0 | 1588 | } |
aoqi@0 | 1589 | |
aoqi@0 | 1590 | /** Construct a tree simulating the expression {@code C.this}. |
aoqi@0 | 1591 | * @param pos The source code position to be used for the tree. |
aoqi@0 | 1592 | * @param c The qualifier class. |
aoqi@0 | 1593 | */ |
aoqi@0 | 1594 | JCExpression makeThis(DiagnosticPosition pos, TypeSymbol c) { |
aoqi@0 | 1595 | if (currentClass == c) { |
aoqi@0 | 1596 | // in this case, `this' works fine |
aoqi@0 | 1597 | return make.at(pos).This(c.erasure(types)); |
aoqi@0 | 1598 | } else { |
aoqi@0 | 1599 | // need to go via this$n |
aoqi@0 | 1600 | return makeOuterThis(pos, c); |
aoqi@0 | 1601 | } |
aoqi@0 | 1602 | } |
aoqi@0 | 1603 | |
aoqi@0 | 1604 | /** |
aoqi@0 | 1605 | * Optionally replace a try statement with the desugaring of a |
aoqi@0 | 1606 | * try-with-resources statement. The canonical desugaring of |
aoqi@0 | 1607 | * |
aoqi@0 | 1608 | * try ResourceSpecification |
aoqi@0 | 1609 | * Block |
aoqi@0 | 1610 | * |
aoqi@0 | 1611 | * is |
aoqi@0 | 1612 | * |
aoqi@0 | 1613 | * { |
aoqi@0 | 1614 | * final VariableModifiers_minus_final R #resource = Expression; |
aoqi@0 | 1615 | * Throwable #primaryException = null; |
aoqi@0 | 1616 | * |
aoqi@0 | 1617 | * try ResourceSpecificationtail |
aoqi@0 | 1618 | * Block |
aoqi@0 | 1619 | * catch (Throwable #t) { |
aoqi@0 | 1620 | * #primaryException = t; |
aoqi@0 | 1621 | * throw #t; |
aoqi@0 | 1622 | * } finally { |
aoqi@0 | 1623 | * if (#resource != null) { |
aoqi@0 | 1624 | * if (#primaryException != null) { |
aoqi@0 | 1625 | * try { |
aoqi@0 | 1626 | * #resource.close(); |
aoqi@0 | 1627 | * } catch(Throwable #suppressedException) { |
aoqi@0 | 1628 | * #primaryException.addSuppressed(#suppressedException); |
aoqi@0 | 1629 | * } |
aoqi@0 | 1630 | * } else { |
aoqi@0 | 1631 | * #resource.close(); |
aoqi@0 | 1632 | * } |
aoqi@0 | 1633 | * } |
aoqi@0 | 1634 | * } |
aoqi@0 | 1635 | * |
aoqi@0 | 1636 | * @param tree The try statement to inspect. |
aoqi@0 | 1637 | * @return A a desugared try-with-resources tree, or the original |
aoqi@0 | 1638 | * try block if there are no resources to manage. |
aoqi@0 | 1639 | */ |
aoqi@0 | 1640 | JCTree makeTwrTry(JCTry tree) { |
aoqi@0 | 1641 | make_at(tree.pos()); |
aoqi@0 | 1642 | twrVars = twrVars.dup(); |
aoqi@0 | 1643 | JCBlock twrBlock = makeTwrBlock(tree.resources, tree.body, |
aoqi@0 | 1644 | tree.finallyCanCompleteNormally, 0); |
aoqi@0 | 1645 | if (tree.catchers.isEmpty() && tree.finalizer == null) |
aoqi@0 | 1646 | result = translate(twrBlock); |
aoqi@0 | 1647 | else |
aoqi@0 | 1648 | result = translate(make.Try(twrBlock, tree.catchers, tree.finalizer)); |
aoqi@0 | 1649 | twrVars = twrVars.leave(); |
aoqi@0 | 1650 | return result; |
aoqi@0 | 1651 | } |
aoqi@0 | 1652 | |
aoqi@0 | 1653 | private JCBlock makeTwrBlock(List<JCTree> resources, JCBlock block, |
aoqi@0 | 1654 | boolean finallyCanCompleteNormally, int depth) { |
aoqi@0 | 1655 | if (resources.isEmpty()) |
aoqi@0 | 1656 | return block; |
aoqi@0 | 1657 | |
aoqi@0 | 1658 | // Add resource declaration or expression to block statements |
aoqi@0 | 1659 | ListBuffer<JCStatement> stats = new ListBuffer<JCStatement>(); |
aoqi@0 | 1660 | JCTree resource = resources.head; |
aoqi@0 | 1661 | JCExpression expr = null; |
aoqi@0 | 1662 | if (resource instanceof JCVariableDecl) { |
aoqi@0 | 1663 | JCVariableDecl var = (JCVariableDecl) resource; |
aoqi@0 | 1664 | expr = make.Ident(var.sym).setType(resource.type); |
aoqi@0 | 1665 | stats.add(var); |
aoqi@0 | 1666 | } else { |
aoqi@0 | 1667 | Assert.check(resource instanceof JCExpression); |
aoqi@0 | 1668 | VarSymbol syntheticTwrVar = |
aoqi@0 | 1669 | new VarSymbol(SYNTHETIC | FINAL, |
aoqi@0 | 1670 | makeSyntheticName(names.fromString("twrVar" + |
aoqi@0 | 1671 | depth), twrVars), |
aoqi@0 | 1672 | (resource.type.hasTag(BOT)) ? |
aoqi@0 | 1673 | syms.autoCloseableType : resource.type, |
aoqi@0 | 1674 | currentMethodSym); |
aoqi@0 | 1675 | twrVars.enter(syntheticTwrVar); |
aoqi@0 | 1676 | JCVariableDecl syntheticTwrVarDecl = |
aoqi@0 | 1677 | make.VarDef(syntheticTwrVar, (JCExpression)resource); |
aoqi@0 | 1678 | expr = (JCExpression)make.Ident(syntheticTwrVar); |
aoqi@0 | 1679 | stats.add(syntheticTwrVarDecl); |
aoqi@0 | 1680 | } |
aoqi@0 | 1681 | |
aoqi@0 | 1682 | // Add primaryException declaration |
aoqi@0 | 1683 | VarSymbol primaryException = |
aoqi@0 | 1684 | new VarSymbol(SYNTHETIC, |
aoqi@0 | 1685 | makeSyntheticName(names.fromString("primaryException" + |
aoqi@0 | 1686 | depth), twrVars), |
aoqi@0 | 1687 | syms.throwableType, |
aoqi@0 | 1688 | currentMethodSym); |
aoqi@0 | 1689 | twrVars.enter(primaryException); |
aoqi@0 | 1690 | JCVariableDecl primaryExceptionTreeDecl = make.VarDef(primaryException, makeNull()); |
aoqi@0 | 1691 | stats.add(primaryExceptionTreeDecl); |
aoqi@0 | 1692 | |
aoqi@0 | 1693 | // Create catch clause that saves exception and then rethrows it |
aoqi@0 | 1694 | VarSymbol param = |
aoqi@0 | 1695 | new VarSymbol(FINAL|SYNTHETIC, |
aoqi@0 | 1696 | names.fromString("t" + |
aoqi@0 | 1697 | target.syntheticNameChar()), |
aoqi@0 | 1698 | syms.throwableType, |
aoqi@0 | 1699 | currentMethodSym); |
aoqi@0 | 1700 | JCVariableDecl paramTree = make.VarDef(param, null); |
aoqi@0 | 1701 | JCStatement assign = make.Assignment(primaryException, make.Ident(param)); |
aoqi@0 | 1702 | JCStatement rethrowStat = make.Throw(make.Ident(param)); |
aoqi@0 | 1703 | JCBlock catchBlock = make.Block(0L, List.<JCStatement>of(assign, rethrowStat)); |
aoqi@0 | 1704 | JCCatch catchClause = make.Catch(paramTree, catchBlock); |
aoqi@0 | 1705 | |
aoqi@0 | 1706 | int oldPos = make.pos; |
aoqi@0 | 1707 | make.at(TreeInfo.endPos(block)); |
aoqi@0 | 1708 | JCBlock finallyClause = makeTwrFinallyClause(primaryException, expr); |
aoqi@0 | 1709 | make.at(oldPos); |
aoqi@0 | 1710 | JCTry outerTry = make.Try(makeTwrBlock(resources.tail, block, |
aoqi@0 | 1711 | finallyCanCompleteNormally, depth + 1), |
aoqi@0 | 1712 | List.<JCCatch>of(catchClause), |
aoqi@0 | 1713 | finallyClause); |
aoqi@0 | 1714 | outerTry.finallyCanCompleteNormally = finallyCanCompleteNormally; |
aoqi@0 | 1715 | stats.add(outerTry); |
aoqi@0 | 1716 | JCBlock newBlock = make.Block(0L, stats.toList()); |
aoqi@0 | 1717 | return newBlock; |
aoqi@0 | 1718 | } |
aoqi@0 | 1719 | |
aoqi@0 | 1720 | private JCBlock makeTwrFinallyClause(Symbol primaryException, JCExpression resource) { |
aoqi@0 | 1721 | // primaryException.addSuppressed(catchException); |
aoqi@0 | 1722 | VarSymbol catchException = |
aoqi@0 | 1723 | new VarSymbol(SYNTHETIC, make.paramName(2), |
aoqi@0 | 1724 | syms.throwableType, |
aoqi@0 | 1725 | currentMethodSym); |
aoqi@0 | 1726 | JCStatement addSuppressionStatement = |
aoqi@0 | 1727 | make.Exec(makeCall(make.Ident(primaryException), |
aoqi@0 | 1728 | names.addSuppressed, |
aoqi@0 | 1729 | List.<JCExpression>of(make.Ident(catchException)))); |
aoqi@0 | 1730 | |
aoqi@0 | 1731 | // try { resource.close(); } catch (e) { primaryException.addSuppressed(e); } |
aoqi@0 | 1732 | JCBlock tryBlock = |
aoqi@0 | 1733 | make.Block(0L, List.<JCStatement>of(makeResourceCloseInvocation(resource))); |
aoqi@0 | 1734 | JCVariableDecl catchExceptionDecl = make.VarDef(catchException, null); |
aoqi@0 | 1735 | JCBlock catchBlock = make.Block(0L, List.<JCStatement>of(addSuppressionStatement)); |
aoqi@0 | 1736 | List<JCCatch> catchClauses = List.<JCCatch>of(make.Catch(catchExceptionDecl, catchBlock)); |
aoqi@0 | 1737 | JCTry tryTree = make.Try(tryBlock, catchClauses, null); |
aoqi@0 | 1738 | tryTree.finallyCanCompleteNormally = true; |
aoqi@0 | 1739 | |
aoqi@0 | 1740 | // if (primaryException != null) {try...} else resourceClose; |
aoqi@0 | 1741 | JCIf closeIfStatement = make.If(makeNonNullCheck(make.Ident(primaryException)), |
aoqi@0 | 1742 | tryTree, |
aoqi@0 | 1743 | makeResourceCloseInvocation(resource)); |
aoqi@0 | 1744 | |
aoqi@0 | 1745 | // if (#resource != null) { if (primaryException ... } |
aoqi@0 | 1746 | return make.Block(0L, |
aoqi@0 | 1747 | List.<JCStatement>of(make.If(makeNonNullCheck(resource), |
aoqi@0 | 1748 | closeIfStatement, |
aoqi@0 | 1749 | null))); |
aoqi@0 | 1750 | } |
aoqi@0 | 1751 | |
aoqi@0 | 1752 | private JCStatement makeResourceCloseInvocation(JCExpression resource) { |
aoqi@0 | 1753 | // convert to AutoCloseable if needed |
aoqi@0 | 1754 | if (types.asSuper(resource.type, syms.autoCloseableType.tsym) == null) { |
aoqi@0 | 1755 | resource = (JCExpression) convert(resource, syms.autoCloseableType); |
aoqi@0 | 1756 | } |
aoqi@0 | 1757 | |
aoqi@0 | 1758 | // create resource.close() method invocation |
aoqi@0 | 1759 | JCExpression resourceClose = makeCall(resource, |
aoqi@0 | 1760 | names.close, |
aoqi@0 | 1761 | List.<JCExpression>nil()); |
aoqi@0 | 1762 | return make.Exec(resourceClose); |
aoqi@0 | 1763 | } |
aoqi@0 | 1764 | |
aoqi@0 | 1765 | private JCExpression makeNonNullCheck(JCExpression expression) { |
aoqi@0 | 1766 | return makeBinary(NE, expression, makeNull()); |
aoqi@0 | 1767 | } |
aoqi@0 | 1768 | |
aoqi@0 | 1769 | /** Construct a tree that represents the outer instance |
aoqi@0 | 1770 | * {@code C.this}. Never pick the current `this'. |
aoqi@0 | 1771 | * @param pos The source code position to be used for the tree. |
aoqi@0 | 1772 | * @param c The qualifier class. |
aoqi@0 | 1773 | */ |
aoqi@0 | 1774 | JCExpression makeOuterThis(DiagnosticPosition pos, TypeSymbol c) { |
aoqi@0 | 1775 | List<VarSymbol> ots = outerThisStack; |
aoqi@0 | 1776 | if (ots.isEmpty()) { |
aoqi@0 | 1777 | log.error(pos, "no.encl.instance.of.type.in.scope", c); |
aoqi@0 | 1778 | Assert.error(); |
aoqi@0 | 1779 | return makeNull(); |
aoqi@0 | 1780 | } |
aoqi@0 | 1781 | VarSymbol ot = ots.head; |
aoqi@0 | 1782 | JCExpression tree = access(make.at(pos).Ident(ot)); |
aoqi@0 | 1783 | TypeSymbol otc = ot.type.tsym; |
aoqi@0 | 1784 | while (otc != c) { |
aoqi@0 | 1785 | do { |
aoqi@0 | 1786 | ots = ots.tail; |
aoqi@0 | 1787 | if (ots.isEmpty()) { |
aoqi@0 | 1788 | log.error(pos, |
aoqi@0 | 1789 | "no.encl.instance.of.type.in.scope", |
aoqi@0 | 1790 | c); |
aoqi@0 | 1791 | Assert.error(); // should have been caught in Attr |
aoqi@0 | 1792 | return tree; |
aoqi@0 | 1793 | } |
aoqi@0 | 1794 | ot = ots.head; |
aoqi@0 | 1795 | } while (ot.owner != otc); |
aoqi@0 | 1796 | if (otc.owner.kind != PCK && !otc.hasOuterInstance()) { |
aoqi@0 | 1797 | chk.earlyRefError(pos, c); |
aoqi@0 | 1798 | Assert.error(); // should have been caught in Attr |
aoqi@0 | 1799 | return makeNull(); |
aoqi@0 | 1800 | } |
aoqi@0 | 1801 | tree = access(make.at(pos).Select(tree, ot)); |
aoqi@0 | 1802 | otc = ot.type.tsym; |
aoqi@0 | 1803 | } |
aoqi@0 | 1804 | return tree; |
aoqi@0 | 1805 | } |
aoqi@0 | 1806 | |
aoqi@0 | 1807 | /** Construct a tree that represents the closest outer instance |
aoqi@0 | 1808 | * {@code C.this} such that the given symbol is a member of C. |
aoqi@0 | 1809 | * @param pos The source code position to be used for the tree. |
aoqi@0 | 1810 | * @param sym The accessed symbol. |
aoqi@0 | 1811 | * @param preciseMatch should we accept a type that is a subtype of |
aoqi@0 | 1812 | * sym's owner, even if it doesn't contain sym |
aoqi@0 | 1813 | * due to hiding, overriding, or non-inheritance |
aoqi@0 | 1814 | * due to protection? |
aoqi@0 | 1815 | */ |
aoqi@0 | 1816 | JCExpression makeOwnerThis(DiagnosticPosition pos, Symbol sym, boolean preciseMatch) { |
aoqi@0 | 1817 | Symbol c = sym.owner; |
aoqi@0 | 1818 | if (preciseMatch ? sym.isMemberOf(currentClass, types) |
aoqi@0 | 1819 | : currentClass.isSubClass(sym.owner, types)) { |
aoqi@0 | 1820 | // in this case, `this' works fine |
aoqi@0 | 1821 | return make.at(pos).This(c.erasure(types)); |
aoqi@0 | 1822 | } else { |
aoqi@0 | 1823 | // need to go via this$n |
aoqi@0 | 1824 | return makeOwnerThisN(pos, sym, preciseMatch); |
aoqi@0 | 1825 | } |
aoqi@0 | 1826 | } |
aoqi@0 | 1827 | |
aoqi@0 | 1828 | /** |
aoqi@0 | 1829 | * Similar to makeOwnerThis but will never pick "this". |
aoqi@0 | 1830 | */ |
aoqi@0 | 1831 | JCExpression makeOwnerThisN(DiagnosticPosition pos, Symbol sym, boolean preciseMatch) { |
aoqi@0 | 1832 | Symbol c = sym.owner; |
aoqi@0 | 1833 | List<VarSymbol> ots = outerThisStack; |
aoqi@0 | 1834 | if (ots.isEmpty()) { |
aoqi@0 | 1835 | log.error(pos, "no.encl.instance.of.type.in.scope", c); |
aoqi@0 | 1836 | Assert.error(); |
aoqi@0 | 1837 | return makeNull(); |
aoqi@0 | 1838 | } |
aoqi@0 | 1839 | VarSymbol ot = ots.head; |
aoqi@0 | 1840 | JCExpression tree = access(make.at(pos).Ident(ot)); |
aoqi@0 | 1841 | TypeSymbol otc = ot.type.tsym; |
aoqi@0 | 1842 | while (!(preciseMatch ? sym.isMemberOf(otc, types) : otc.isSubClass(sym.owner, types))) { |
aoqi@0 | 1843 | do { |
aoqi@0 | 1844 | ots = ots.tail; |
aoqi@0 | 1845 | if (ots.isEmpty()) { |
aoqi@0 | 1846 | log.error(pos, |
aoqi@0 | 1847 | "no.encl.instance.of.type.in.scope", |
aoqi@0 | 1848 | c); |
aoqi@0 | 1849 | Assert.error(); |
aoqi@0 | 1850 | return tree; |
aoqi@0 | 1851 | } |
aoqi@0 | 1852 | ot = ots.head; |
aoqi@0 | 1853 | } while (ot.owner != otc); |
aoqi@0 | 1854 | tree = access(make.at(pos).Select(tree, ot)); |
aoqi@0 | 1855 | otc = ot.type.tsym; |
aoqi@0 | 1856 | } |
aoqi@0 | 1857 | return tree; |
aoqi@0 | 1858 | } |
aoqi@0 | 1859 | |
aoqi@0 | 1860 | /** Return tree simulating the assignment {@code this.name = name}, where |
aoqi@0 | 1861 | * name is the name of a free variable. |
aoqi@0 | 1862 | */ |
aoqi@0 | 1863 | JCStatement initField(int pos, Name name) { |
aoqi@0 | 1864 | Scope.Entry e = proxies.lookup(name); |
aoqi@0 | 1865 | Symbol rhs = e.sym; |
aoqi@0 | 1866 | Assert.check(rhs.owner.kind == MTH); |
aoqi@0 | 1867 | Symbol lhs = e.next().sym; |
aoqi@0 | 1868 | Assert.check(rhs.owner.owner == lhs.owner); |
aoqi@0 | 1869 | make.at(pos); |
aoqi@0 | 1870 | return |
aoqi@0 | 1871 | make.Exec( |
aoqi@0 | 1872 | make.Assign( |
aoqi@0 | 1873 | make.Select(make.This(lhs.owner.erasure(types)), lhs), |
aoqi@0 | 1874 | make.Ident(rhs)).setType(lhs.erasure(types))); |
aoqi@0 | 1875 | } |
aoqi@0 | 1876 | |
aoqi@0 | 1877 | /** Return tree simulating the assignment {@code this.this$n = this$n}. |
aoqi@0 | 1878 | */ |
aoqi@0 | 1879 | JCStatement initOuterThis(int pos) { |
aoqi@0 | 1880 | VarSymbol rhs = outerThisStack.head; |
aoqi@0 | 1881 | Assert.check(rhs.owner.kind == MTH); |
aoqi@0 | 1882 | VarSymbol lhs = outerThisStack.tail.head; |
aoqi@0 | 1883 | Assert.check(rhs.owner.owner == lhs.owner); |
aoqi@0 | 1884 | make.at(pos); |
aoqi@0 | 1885 | return |
aoqi@0 | 1886 | make.Exec( |
aoqi@0 | 1887 | make.Assign( |
aoqi@0 | 1888 | make.Select(make.This(lhs.owner.erasure(types)), lhs), |
aoqi@0 | 1889 | make.Ident(rhs)).setType(lhs.erasure(types))); |
aoqi@0 | 1890 | } |
aoqi@0 | 1891 | |
aoqi@0 | 1892 | /************************************************************************** |
aoqi@0 | 1893 | * Code for .class |
aoqi@0 | 1894 | *************************************************************************/ |
aoqi@0 | 1895 | |
aoqi@0 | 1896 | /** Return the symbol of a class to contain a cache of |
aoqi@0 | 1897 | * compiler-generated statics such as class$ and the |
aoqi@0 | 1898 | * $assertionsDisabled flag. We create an anonymous nested class |
aoqi@0 | 1899 | * (unless one already exists) and return its symbol. However, |
aoqi@0 | 1900 | * for backward compatibility in 1.4 and earlier we use the |
aoqi@0 | 1901 | * top-level class itself. |
aoqi@0 | 1902 | */ |
aoqi@0 | 1903 | private ClassSymbol outerCacheClass() { |
aoqi@0 | 1904 | ClassSymbol clazz = outermostClassDef.sym; |
aoqi@0 | 1905 | if ((clazz.flags() & INTERFACE) == 0 && |
aoqi@0 | 1906 | !target.useInnerCacheClass()) return clazz; |
aoqi@0 | 1907 | Scope s = clazz.members(); |
aoqi@0 | 1908 | for (Scope.Entry e = s.elems; e != null; e = e.sibling) |
aoqi@0 | 1909 | if (e.sym.kind == TYP && |
aoqi@0 | 1910 | e.sym.name == names.empty && |
aoqi@0 | 1911 | (e.sym.flags() & INTERFACE) == 0) return (ClassSymbol) e.sym; |
aoqi@0 | 1912 | return makeEmptyClass(STATIC | SYNTHETIC, clazz).sym; |
aoqi@0 | 1913 | } |
aoqi@0 | 1914 | |
aoqi@0 | 1915 | /** Return symbol for "class$" method. If there is no method definition |
aoqi@0 | 1916 | * for class$, construct one as follows: |
aoqi@0 | 1917 | * |
aoqi@0 | 1918 | * class class$(String x0) { |
aoqi@0 | 1919 | * try { |
aoqi@0 | 1920 | * return Class.forName(x0); |
aoqi@0 | 1921 | * } catch (ClassNotFoundException x1) { |
aoqi@0 | 1922 | * throw new NoClassDefFoundError(x1.getMessage()); |
aoqi@0 | 1923 | * } |
aoqi@0 | 1924 | * } |
aoqi@0 | 1925 | */ |
aoqi@0 | 1926 | private MethodSymbol classDollarSym(DiagnosticPosition pos) { |
aoqi@0 | 1927 | ClassSymbol outerCacheClass = outerCacheClass(); |
aoqi@0 | 1928 | MethodSymbol classDollarSym = |
aoqi@0 | 1929 | (MethodSymbol)lookupSynthetic(classDollar, |
aoqi@0 | 1930 | outerCacheClass.members()); |
aoqi@0 | 1931 | if (classDollarSym == null) { |
aoqi@0 | 1932 | classDollarSym = new MethodSymbol( |
aoqi@0 | 1933 | STATIC | SYNTHETIC, |
aoqi@0 | 1934 | classDollar, |
aoqi@0 | 1935 | new MethodType( |
aoqi@0 | 1936 | List.of(syms.stringType), |
aoqi@0 | 1937 | types.erasure(syms.classType), |
aoqi@0 | 1938 | List.<Type>nil(), |
aoqi@0 | 1939 | syms.methodClass), |
aoqi@0 | 1940 | outerCacheClass); |
aoqi@0 | 1941 | enterSynthetic(pos, classDollarSym, outerCacheClass.members()); |
aoqi@0 | 1942 | |
aoqi@0 | 1943 | JCMethodDecl md = make.MethodDef(classDollarSym, null); |
aoqi@0 | 1944 | try { |
aoqi@0 | 1945 | md.body = classDollarSymBody(pos, md); |
aoqi@0 | 1946 | } catch (CompletionFailure ex) { |
aoqi@0 | 1947 | md.body = make.Block(0, List.<JCStatement>nil()); |
aoqi@0 | 1948 | chk.completionError(pos, ex); |
aoqi@0 | 1949 | } |
aoqi@0 | 1950 | JCClassDecl outerCacheClassDef = classDef(outerCacheClass); |
aoqi@0 | 1951 | outerCacheClassDef.defs = outerCacheClassDef.defs.prepend(md); |
aoqi@0 | 1952 | } |
aoqi@0 | 1953 | return classDollarSym; |
aoqi@0 | 1954 | } |
aoqi@0 | 1955 | |
aoqi@0 | 1956 | /** Generate code for class$(String name). */ |
aoqi@0 | 1957 | JCBlock classDollarSymBody(DiagnosticPosition pos, JCMethodDecl md) { |
aoqi@0 | 1958 | MethodSymbol classDollarSym = md.sym; |
aoqi@0 | 1959 | ClassSymbol outerCacheClass = (ClassSymbol)classDollarSym.owner; |
aoqi@0 | 1960 | |
aoqi@0 | 1961 | JCBlock returnResult; |
aoqi@0 | 1962 | |
aoqi@0 | 1963 | // in 1.4.2 and above, we use |
aoqi@0 | 1964 | // Class.forName(String name, boolean init, ClassLoader loader); |
aoqi@0 | 1965 | // which requires we cache the current loader in cl$ |
aoqi@0 | 1966 | if (target.classLiteralsNoInit()) { |
aoqi@0 | 1967 | // clsym = "private static ClassLoader cl$" |
aoqi@0 | 1968 | VarSymbol clsym = new VarSymbol(STATIC|SYNTHETIC, |
aoqi@0 | 1969 | names.fromString("cl" + target.syntheticNameChar()), |
aoqi@0 | 1970 | syms.classLoaderType, |
aoqi@0 | 1971 | outerCacheClass); |
aoqi@0 | 1972 | enterSynthetic(pos, clsym, outerCacheClass.members()); |
aoqi@0 | 1973 | |
aoqi@0 | 1974 | // emit "private static ClassLoader cl$;" |
aoqi@0 | 1975 | JCVariableDecl cldef = make.VarDef(clsym, null); |
aoqi@0 | 1976 | JCClassDecl outerCacheClassDef = classDef(outerCacheClass); |
aoqi@0 | 1977 | outerCacheClassDef.defs = outerCacheClassDef.defs.prepend(cldef); |
aoqi@0 | 1978 | |
aoqi@0 | 1979 | // newcache := "new cache$1[0]" |
aoqi@0 | 1980 | JCNewArray newcache = make. |
aoqi@0 | 1981 | NewArray(make.Type(outerCacheClass.type), |
aoqi@0 | 1982 | List.<JCExpression>of(make.Literal(INT, 0).setType(syms.intType)), |
aoqi@0 | 1983 | null); |
aoqi@0 | 1984 | newcache.type = new ArrayType(types.erasure(outerCacheClass.type), |
aoqi@0 | 1985 | syms.arrayClass); |
aoqi@0 | 1986 | |
aoqi@0 | 1987 | // forNameSym := java.lang.Class.forName( |
aoqi@0 | 1988 | // String s,boolean init,ClassLoader loader) |
aoqi@0 | 1989 | Symbol forNameSym = lookupMethod(make_pos, names.forName, |
aoqi@0 | 1990 | types.erasure(syms.classType), |
aoqi@0 | 1991 | List.of(syms.stringType, |
aoqi@0 | 1992 | syms.booleanType, |
aoqi@0 | 1993 | syms.classLoaderType)); |
aoqi@0 | 1994 | // clvalue := "(cl$ == null) ? |
aoqi@0 | 1995 | // $newcache.getClass().getComponentType().getClassLoader() : cl$" |
aoqi@0 | 1996 | JCExpression clvalue = |
aoqi@0 | 1997 | make.Conditional( |
aoqi@0 | 1998 | makeBinary(EQ, make.Ident(clsym), makeNull()), |
aoqi@0 | 1999 | make.Assign( |
aoqi@0 | 2000 | make.Ident(clsym), |
aoqi@0 | 2001 | makeCall( |
aoqi@0 | 2002 | makeCall(makeCall(newcache, |
aoqi@0 | 2003 | names.getClass, |
aoqi@0 | 2004 | List.<JCExpression>nil()), |
aoqi@0 | 2005 | names.getComponentType, |
aoqi@0 | 2006 | List.<JCExpression>nil()), |
aoqi@0 | 2007 | names.getClassLoader, |
aoqi@0 | 2008 | List.<JCExpression>nil())).setType(syms.classLoaderType), |
aoqi@0 | 2009 | make.Ident(clsym)).setType(syms.classLoaderType); |
aoqi@0 | 2010 | |
aoqi@0 | 2011 | // returnResult := "{ return Class.forName(param1, false, cl$); }" |
aoqi@0 | 2012 | List<JCExpression> args = List.of(make.Ident(md.params.head.sym), |
aoqi@0 | 2013 | makeLit(syms.booleanType, 0), |
aoqi@0 | 2014 | clvalue); |
aoqi@0 | 2015 | returnResult = make. |
aoqi@0 | 2016 | Block(0, List.<JCStatement>of(make. |
aoqi@0 | 2017 | Call(make. // return |
aoqi@0 | 2018 | App(make. |
aoqi@0 | 2019 | Ident(forNameSym), args)))); |
aoqi@0 | 2020 | } else { |
aoqi@0 | 2021 | // forNameSym := java.lang.Class.forName(String s) |
aoqi@0 | 2022 | Symbol forNameSym = lookupMethod(make_pos, |
aoqi@0 | 2023 | names.forName, |
aoqi@0 | 2024 | types.erasure(syms.classType), |
aoqi@0 | 2025 | List.of(syms.stringType)); |
aoqi@0 | 2026 | // returnResult := "{ return Class.forName(param1); }" |
aoqi@0 | 2027 | returnResult = make. |
aoqi@0 | 2028 | Block(0, List.of(make. |
aoqi@0 | 2029 | Call(make. // return |
aoqi@0 | 2030 | App(make. |
aoqi@0 | 2031 | QualIdent(forNameSym), |
aoqi@0 | 2032 | List.<JCExpression>of(make. |
aoqi@0 | 2033 | Ident(md.params. |
aoqi@0 | 2034 | head.sym)))))); |
aoqi@0 | 2035 | } |
aoqi@0 | 2036 | |
aoqi@0 | 2037 | // catchParam := ClassNotFoundException e1 |
aoqi@0 | 2038 | VarSymbol catchParam = |
aoqi@0 | 2039 | new VarSymbol(SYNTHETIC, make.paramName(1), |
aoqi@0 | 2040 | syms.classNotFoundExceptionType, |
aoqi@0 | 2041 | classDollarSym); |
aoqi@0 | 2042 | |
aoqi@0 | 2043 | JCStatement rethrow; |
aoqi@0 | 2044 | if (target.hasInitCause()) { |
aoqi@0 | 2045 | // rethrow = "throw new NoClassDefFoundError().initCause(e); |
aoqi@0 | 2046 | JCExpression throwExpr = |
aoqi@0 | 2047 | makeCall(makeNewClass(syms.noClassDefFoundErrorType, |
aoqi@0 | 2048 | List.<JCExpression>nil()), |
aoqi@0 | 2049 | names.initCause, |
aoqi@0 | 2050 | List.<JCExpression>of(make.Ident(catchParam))); |
aoqi@0 | 2051 | rethrow = make.Throw(throwExpr); |
aoqi@0 | 2052 | } else { |
aoqi@0 | 2053 | // getMessageSym := ClassNotFoundException.getMessage() |
aoqi@0 | 2054 | Symbol getMessageSym = lookupMethod(make_pos, |
aoqi@0 | 2055 | names.getMessage, |
aoqi@0 | 2056 | syms.classNotFoundExceptionType, |
aoqi@0 | 2057 | List.<Type>nil()); |
aoqi@0 | 2058 | // rethrow = "throw new NoClassDefFoundError(e.getMessage());" |
aoqi@0 | 2059 | rethrow = make. |
aoqi@0 | 2060 | Throw(makeNewClass(syms.noClassDefFoundErrorType, |
aoqi@0 | 2061 | List.<JCExpression>of(make.App(make.Select(make.Ident(catchParam), |
aoqi@0 | 2062 | getMessageSym), |
aoqi@0 | 2063 | List.<JCExpression>nil())))); |
aoqi@0 | 2064 | } |
aoqi@0 | 2065 | |
aoqi@0 | 2066 | // rethrowStmt := "( $rethrow )" |
aoqi@0 | 2067 | JCBlock rethrowStmt = make.Block(0, List.of(rethrow)); |
aoqi@0 | 2068 | |
aoqi@0 | 2069 | // catchBlock := "catch ($catchParam) $rethrowStmt" |
aoqi@0 | 2070 | JCCatch catchBlock = make.Catch(make.VarDef(catchParam, null), |
aoqi@0 | 2071 | rethrowStmt); |
aoqi@0 | 2072 | |
aoqi@0 | 2073 | // tryCatch := "try $returnResult $catchBlock" |
aoqi@0 | 2074 | JCStatement tryCatch = make.Try(returnResult, |
aoqi@0 | 2075 | List.of(catchBlock), null); |
aoqi@0 | 2076 | |
aoqi@0 | 2077 | return make.Block(0, List.of(tryCatch)); |
aoqi@0 | 2078 | } |
aoqi@0 | 2079 | // where |
aoqi@0 | 2080 | /** Create an attributed tree of the form left.name(). */ |
aoqi@0 | 2081 | private JCMethodInvocation makeCall(JCExpression left, Name name, List<JCExpression> args) { |
aoqi@0 | 2082 | Assert.checkNonNull(left.type); |
aoqi@0 | 2083 | Symbol funcsym = lookupMethod(make_pos, name, left.type, |
aoqi@0 | 2084 | TreeInfo.types(args)); |
aoqi@0 | 2085 | return make.App(make.Select(left, funcsym), args); |
aoqi@0 | 2086 | } |
aoqi@0 | 2087 | |
aoqi@0 | 2088 | /** The Name Of The variable to cache T.class values. |
aoqi@0 | 2089 | * @param sig The signature of type T. |
aoqi@0 | 2090 | */ |
aoqi@0 | 2091 | private Name cacheName(String sig) { |
aoqi@0 | 2092 | StringBuilder buf = new StringBuilder(); |
aoqi@0 | 2093 | if (sig.startsWith("[")) { |
aoqi@0 | 2094 | buf = buf.append("array"); |
aoqi@0 | 2095 | while (sig.startsWith("[")) { |
aoqi@0 | 2096 | buf = buf.append(target.syntheticNameChar()); |
aoqi@0 | 2097 | sig = sig.substring(1); |
aoqi@0 | 2098 | } |
aoqi@0 | 2099 | if (sig.startsWith("L")) { |
aoqi@0 | 2100 | sig = sig.substring(0, sig.length() - 1); |
aoqi@0 | 2101 | } |
aoqi@0 | 2102 | } else { |
aoqi@0 | 2103 | buf = buf.append("class" + target.syntheticNameChar()); |
aoqi@0 | 2104 | } |
aoqi@0 | 2105 | buf = buf.append(sig.replace('.', target.syntheticNameChar())); |
aoqi@0 | 2106 | return names.fromString(buf.toString()); |
aoqi@0 | 2107 | } |
aoqi@0 | 2108 | |
aoqi@0 | 2109 | /** The variable symbol that caches T.class values. |
aoqi@0 | 2110 | * If none exists yet, create a definition. |
aoqi@0 | 2111 | * @param sig The signature of type T. |
aoqi@0 | 2112 | * @param pos The position to report diagnostics, if any. |
aoqi@0 | 2113 | */ |
aoqi@0 | 2114 | private VarSymbol cacheSym(DiagnosticPosition pos, String sig) { |
aoqi@0 | 2115 | ClassSymbol outerCacheClass = outerCacheClass(); |
aoqi@0 | 2116 | Name cname = cacheName(sig); |
aoqi@0 | 2117 | VarSymbol cacheSym = |
aoqi@0 | 2118 | (VarSymbol)lookupSynthetic(cname, outerCacheClass.members()); |
aoqi@0 | 2119 | if (cacheSym == null) { |
aoqi@0 | 2120 | cacheSym = new VarSymbol( |
aoqi@0 | 2121 | STATIC | SYNTHETIC, cname, types.erasure(syms.classType), outerCacheClass); |
aoqi@0 | 2122 | enterSynthetic(pos, cacheSym, outerCacheClass.members()); |
aoqi@0 | 2123 | |
aoqi@0 | 2124 | JCVariableDecl cacheDef = make.VarDef(cacheSym, null); |
aoqi@0 | 2125 | JCClassDecl outerCacheClassDef = classDef(outerCacheClass); |
aoqi@0 | 2126 | outerCacheClassDef.defs = outerCacheClassDef.defs.prepend(cacheDef); |
aoqi@0 | 2127 | } |
aoqi@0 | 2128 | return cacheSym; |
aoqi@0 | 2129 | } |
aoqi@0 | 2130 | |
aoqi@0 | 2131 | /** The tree simulating a T.class expression. |
aoqi@0 | 2132 | * @param clazz The tree identifying type T. |
aoqi@0 | 2133 | */ |
aoqi@0 | 2134 | private JCExpression classOf(JCTree clazz) { |
aoqi@0 | 2135 | return classOfType(clazz.type, clazz.pos()); |
aoqi@0 | 2136 | } |
aoqi@0 | 2137 | |
aoqi@0 | 2138 | private JCExpression classOfType(Type type, DiagnosticPosition pos) { |
aoqi@0 | 2139 | switch (type.getTag()) { |
aoqi@0 | 2140 | case BYTE: case SHORT: case CHAR: case INT: case LONG: case FLOAT: |
aoqi@0 | 2141 | case DOUBLE: case BOOLEAN: case VOID: |
aoqi@0 | 2142 | // replace with <BoxedClass>.TYPE |
aoqi@0 | 2143 | ClassSymbol c = types.boxedClass(type); |
aoqi@0 | 2144 | Symbol typeSym = |
aoqi@0 | 2145 | rs.accessBase( |
aoqi@0 | 2146 | rs.findIdentInType(attrEnv, c.type, names.TYPE, VAR), |
aoqi@0 | 2147 | pos, c.type, names.TYPE, true); |
aoqi@0 | 2148 | if (typeSym.kind == VAR) |
aoqi@0 | 2149 | ((VarSymbol)typeSym).getConstValue(); // ensure initializer is evaluated |
aoqi@0 | 2150 | return make.QualIdent(typeSym); |
aoqi@0 | 2151 | case CLASS: case ARRAY: |
aoqi@0 | 2152 | if (target.hasClassLiterals()) { |
aoqi@0 | 2153 | VarSymbol sym = new VarSymbol( |
aoqi@0 | 2154 | STATIC | PUBLIC | FINAL, names._class, |
aoqi@0 | 2155 | syms.classType, type.tsym); |
aoqi@0 | 2156 | return make_at(pos).Select(make.Type(type), sym); |
aoqi@0 | 2157 | } |
aoqi@0 | 2158 | // replace with <cache == null ? cache = class$(tsig) : cache> |
aoqi@0 | 2159 | // where |
aoqi@0 | 2160 | // - <tsig> is the type signature of T, |
aoqi@0 | 2161 | // - <cache> is the cache variable for tsig. |
aoqi@0 | 2162 | String sig = |
aoqi@0 | 2163 | writer.xClassName(type).toString().replace('/', '.'); |
aoqi@0 | 2164 | Symbol cs = cacheSym(pos, sig); |
aoqi@0 | 2165 | return make_at(pos).Conditional( |
aoqi@0 | 2166 | makeBinary(EQ, make.Ident(cs), makeNull()), |
aoqi@0 | 2167 | make.Assign( |
aoqi@0 | 2168 | make.Ident(cs), |
aoqi@0 | 2169 | make.App( |
aoqi@0 | 2170 | make.Ident(classDollarSym(pos)), |
aoqi@0 | 2171 | List.<JCExpression>of(make.Literal(CLASS, sig) |
aoqi@0 | 2172 | .setType(syms.stringType)))) |
aoqi@0 | 2173 | .setType(types.erasure(syms.classType)), |
aoqi@0 | 2174 | make.Ident(cs)).setType(types.erasure(syms.classType)); |
aoqi@0 | 2175 | default: |
aoqi@0 | 2176 | throw new AssertionError(); |
aoqi@0 | 2177 | } |
aoqi@0 | 2178 | } |
aoqi@0 | 2179 | |
aoqi@0 | 2180 | /************************************************************************** |
aoqi@0 | 2181 | * Code for enabling/disabling assertions. |
aoqi@0 | 2182 | *************************************************************************/ |
aoqi@0 | 2183 | |
aoqi@0 | 2184 | private ClassSymbol assertionsDisabledClassCache; |
aoqi@0 | 2185 | |
aoqi@0 | 2186 | /**Used to create an auxiliary class to hold $assertionsDisabled for interfaces. |
aoqi@0 | 2187 | */ |
aoqi@0 | 2188 | private ClassSymbol assertionsDisabledClass() { |
aoqi@0 | 2189 | if (assertionsDisabledClassCache != null) return assertionsDisabledClassCache; |
aoqi@0 | 2190 | |
aoqi@0 | 2191 | assertionsDisabledClassCache = makeEmptyClass(STATIC | SYNTHETIC, outermostClassDef.sym).sym; |
aoqi@0 | 2192 | |
aoqi@0 | 2193 | return assertionsDisabledClassCache; |
aoqi@0 | 2194 | } |
aoqi@0 | 2195 | |
aoqi@0 | 2196 | // This code is not particularly robust if the user has |
aoqi@0 | 2197 | // previously declared a member named '$assertionsDisabled'. |
aoqi@0 | 2198 | // The same faulty idiom also appears in the translation of |
aoqi@0 | 2199 | // class literals above. We should report an error if a |
aoqi@0 | 2200 | // previous declaration is not synthetic. |
aoqi@0 | 2201 | |
aoqi@0 | 2202 | private JCExpression assertFlagTest(DiagnosticPosition pos) { |
aoqi@0 | 2203 | // Outermost class may be either true class or an interface. |
aoqi@0 | 2204 | ClassSymbol outermostClass = outermostClassDef.sym; |
aoqi@0 | 2205 | |
aoqi@0 | 2206 | //only classes can hold a non-public field, look for a usable one: |
aoqi@0 | 2207 | ClassSymbol container = !currentClass.isInterface() ? currentClass : |
aoqi@0 | 2208 | assertionsDisabledClass(); |
aoqi@0 | 2209 | |
aoqi@0 | 2210 | VarSymbol assertDisabledSym = |
aoqi@0 | 2211 | (VarSymbol)lookupSynthetic(dollarAssertionsDisabled, |
aoqi@0 | 2212 | container.members()); |
aoqi@0 | 2213 | if (assertDisabledSym == null) { |
aoqi@0 | 2214 | assertDisabledSym = |
aoqi@0 | 2215 | new VarSymbol(STATIC | FINAL | SYNTHETIC, |
aoqi@0 | 2216 | dollarAssertionsDisabled, |
aoqi@0 | 2217 | syms.booleanType, |
aoqi@0 | 2218 | container); |
aoqi@0 | 2219 | enterSynthetic(pos, assertDisabledSym, container.members()); |
aoqi@0 | 2220 | Symbol desiredAssertionStatusSym = lookupMethod(pos, |
aoqi@0 | 2221 | names.desiredAssertionStatus, |
aoqi@0 | 2222 | types.erasure(syms.classType), |
aoqi@0 | 2223 | List.<Type>nil()); |
aoqi@0 | 2224 | JCClassDecl containerDef = classDef(container); |
aoqi@0 | 2225 | make_at(containerDef.pos()); |
aoqi@0 | 2226 | JCExpression notStatus = makeUnary(NOT, make.App(make.Select( |
aoqi@0 | 2227 | classOfType(types.erasure(outermostClass.type), |
aoqi@0 | 2228 | containerDef.pos()), |
aoqi@0 | 2229 | desiredAssertionStatusSym))); |
aoqi@0 | 2230 | JCVariableDecl assertDisabledDef = make.VarDef(assertDisabledSym, |
aoqi@0 | 2231 | notStatus); |
aoqi@0 | 2232 | containerDef.defs = containerDef.defs.prepend(assertDisabledDef); |
aoqi@0 | 2233 | |
aoqi@0 | 2234 | if (currentClass.isInterface()) { |
aoqi@0 | 2235 | //need to load the assertions enabled/disabled state while |
aoqi@0 | 2236 | //initializing the interface: |
aoqi@0 | 2237 | JCClassDecl currentClassDef = classDef(currentClass); |
aoqi@0 | 2238 | make_at(currentClassDef.pos()); |
aoqi@0 | 2239 | JCStatement dummy = make.If(make.QualIdent(assertDisabledSym), make.Skip(), null); |
aoqi@0 | 2240 | JCBlock clinit = make.Block(STATIC, List.<JCStatement>of(dummy)); |
aoqi@0 | 2241 | currentClassDef.defs = currentClassDef.defs.prepend(clinit); |
aoqi@0 | 2242 | } |
aoqi@0 | 2243 | } |
aoqi@0 | 2244 | make_at(pos); |
aoqi@0 | 2245 | return makeUnary(NOT, make.Ident(assertDisabledSym)); |
aoqi@0 | 2246 | } |
aoqi@0 | 2247 | |
aoqi@0 | 2248 | |
aoqi@0 | 2249 | /************************************************************************** |
aoqi@0 | 2250 | * Building blocks for let expressions |
aoqi@0 | 2251 | *************************************************************************/ |
aoqi@0 | 2252 | |
aoqi@0 | 2253 | interface TreeBuilder { |
aoqi@0 | 2254 | JCTree build(JCTree arg); |
aoqi@0 | 2255 | } |
aoqi@0 | 2256 | |
aoqi@0 | 2257 | /** Construct an expression using the builder, with the given rval |
aoqi@0 | 2258 | * expression as an argument to the builder. However, the rval |
aoqi@0 | 2259 | * expression must be computed only once, even if used multiple |
aoqi@0 | 2260 | * times in the result of the builder. We do that by |
aoqi@0 | 2261 | * constructing a "let" expression that saves the rvalue into a |
aoqi@0 | 2262 | * temporary variable and then uses the temporary variable in |
aoqi@0 | 2263 | * place of the expression built by the builder. The complete |
aoqi@0 | 2264 | * resulting expression is of the form |
aoqi@0 | 2265 | * <pre> |
aoqi@0 | 2266 | * (let <b>TYPE</b> <b>TEMP</b> = <b>RVAL</b>; |
aoqi@0 | 2267 | * in (<b>BUILDER</b>(<b>TEMP</b>))) |
aoqi@0 | 2268 | * </pre> |
aoqi@0 | 2269 | * where <code><b>TEMP</b></code> is a newly declared variable |
aoqi@0 | 2270 | * in the let expression. |
aoqi@0 | 2271 | */ |
aoqi@0 | 2272 | JCTree abstractRval(JCTree rval, Type type, TreeBuilder builder) { |
aoqi@0 | 2273 | rval = TreeInfo.skipParens(rval); |
aoqi@0 | 2274 | switch (rval.getTag()) { |
aoqi@0 | 2275 | case LITERAL: |
aoqi@0 | 2276 | return builder.build(rval); |
aoqi@0 | 2277 | case IDENT: |
aoqi@0 | 2278 | JCIdent id = (JCIdent) rval; |
aoqi@0 | 2279 | if ((id.sym.flags() & FINAL) != 0 && id.sym.owner.kind == MTH) |
aoqi@0 | 2280 | return builder.build(rval); |
aoqi@0 | 2281 | } |
aoqi@0 | 2282 | VarSymbol var = |
aoqi@0 | 2283 | new VarSymbol(FINAL|SYNTHETIC, |
aoqi@0 | 2284 | names.fromString( |
aoqi@0 | 2285 | target.syntheticNameChar() |
aoqi@0 | 2286 | + "" + rval.hashCode()), |
aoqi@0 | 2287 | type, |
aoqi@0 | 2288 | currentMethodSym); |
aoqi@0 | 2289 | rval = convert(rval,type); |
aoqi@0 | 2290 | JCVariableDecl def = make.VarDef(var, (JCExpression)rval); // XXX cast |
aoqi@0 | 2291 | JCTree built = builder.build(make.Ident(var)); |
aoqi@0 | 2292 | JCTree res = make.LetExpr(def, built); |
aoqi@0 | 2293 | res.type = built.type; |
aoqi@0 | 2294 | return res; |
aoqi@0 | 2295 | } |
aoqi@0 | 2296 | |
aoqi@0 | 2297 | // same as above, with the type of the temporary variable computed |
aoqi@0 | 2298 | JCTree abstractRval(JCTree rval, TreeBuilder builder) { |
aoqi@0 | 2299 | return abstractRval(rval, rval.type, builder); |
aoqi@0 | 2300 | } |
aoqi@0 | 2301 | |
aoqi@0 | 2302 | // same as above, but for an expression that may be used as either |
aoqi@0 | 2303 | // an rvalue or an lvalue. This requires special handling for |
aoqi@0 | 2304 | // Select expressions, where we place the left-hand-side of the |
aoqi@0 | 2305 | // select in a temporary, and for Indexed expressions, where we |
aoqi@0 | 2306 | // place both the indexed expression and the index value in temps. |
aoqi@0 | 2307 | JCTree abstractLval(JCTree lval, final TreeBuilder builder) { |
aoqi@0 | 2308 | lval = TreeInfo.skipParens(lval); |
aoqi@0 | 2309 | switch (lval.getTag()) { |
aoqi@0 | 2310 | case IDENT: |
aoqi@0 | 2311 | return builder.build(lval); |
aoqi@0 | 2312 | case SELECT: { |
aoqi@0 | 2313 | final JCFieldAccess s = (JCFieldAccess)lval; |
aoqi@0 | 2314 | JCTree selected = TreeInfo.skipParens(s.selected); |
aoqi@0 | 2315 | Symbol lid = TreeInfo.symbol(s.selected); |
aoqi@0 | 2316 | if (lid != null && lid.kind == TYP) return builder.build(lval); |
aoqi@0 | 2317 | return abstractRval(s.selected, new TreeBuilder() { |
aoqi@0 | 2318 | public JCTree build(final JCTree selected) { |
aoqi@0 | 2319 | return builder.build(make.Select((JCExpression)selected, s.sym)); |
aoqi@0 | 2320 | } |
aoqi@0 | 2321 | }); |
aoqi@0 | 2322 | } |
aoqi@0 | 2323 | case INDEXED: { |
aoqi@0 | 2324 | final JCArrayAccess i = (JCArrayAccess)lval; |
aoqi@0 | 2325 | return abstractRval(i.indexed, new TreeBuilder() { |
aoqi@0 | 2326 | public JCTree build(final JCTree indexed) { |
aoqi@0 | 2327 | return abstractRval(i.index, syms.intType, new TreeBuilder() { |
aoqi@0 | 2328 | public JCTree build(final JCTree index) { |
aoqi@0 | 2329 | JCTree newLval = make.Indexed((JCExpression)indexed, |
aoqi@0 | 2330 | (JCExpression)index); |
aoqi@0 | 2331 | newLval.setType(i.type); |
aoqi@0 | 2332 | return builder.build(newLval); |
aoqi@0 | 2333 | } |
aoqi@0 | 2334 | }); |
aoqi@0 | 2335 | } |
aoqi@0 | 2336 | }); |
aoqi@0 | 2337 | } |
aoqi@0 | 2338 | case TYPECAST: { |
aoqi@0 | 2339 | return abstractLval(((JCTypeCast)lval).expr, builder); |
aoqi@0 | 2340 | } |
aoqi@0 | 2341 | } |
aoqi@0 | 2342 | throw new AssertionError(lval); |
aoqi@0 | 2343 | } |
aoqi@0 | 2344 | |
aoqi@0 | 2345 | // evaluate and discard the first expression, then evaluate the second. |
aoqi@0 | 2346 | JCTree makeComma(final JCTree expr1, final JCTree expr2) { |
aoqi@0 | 2347 | return abstractRval(expr1, new TreeBuilder() { |
aoqi@0 | 2348 | public JCTree build(final JCTree discarded) { |
aoqi@0 | 2349 | return expr2; |
aoqi@0 | 2350 | } |
aoqi@0 | 2351 | }); |
aoqi@0 | 2352 | } |
aoqi@0 | 2353 | |
aoqi@0 | 2354 | /************************************************************************** |
aoqi@0 | 2355 | * Translation methods |
aoqi@0 | 2356 | *************************************************************************/ |
aoqi@0 | 2357 | |
aoqi@0 | 2358 | /** Visitor argument: enclosing operator node. |
aoqi@0 | 2359 | */ |
aoqi@0 | 2360 | private JCExpression enclOp; |
aoqi@0 | 2361 | |
aoqi@0 | 2362 | /** Visitor method: Translate a single node. |
aoqi@0 | 2363 | * Attach the source position from the old tree to its replacement tree. |
aoqi@0 | 2364 | */ |
aoqi@0 | 2365 | @Override |
aoqi@0 | 2366 | public <T extends JCTree> T translate(T tree) { |
aoqi@0 | 2367 | if (tree == null) { |
aoqi@0 | 2368 | return null; |
aoqi@0 | 2369 | } else { |
aoqi@0 | 2370 | make_at(tree.pos()); |
aoqi@0 | 2371 | T result = super.translate(tree); |
aoqi@0 | 2372 | if (endPosTable != null && result != tree) { |
aoqi@0 | 2373 | endPosTable.replaceTree(tree, result); |
aoqi@0 | 2374 | } |
aoqi@0 | 2375 | return result; |
aoqi@0 | 2376 | } |
aoqi@0 | 2377 | } |
aoqi@0 | 2378 | |
aoqi@0 | 2379 | /** Visitor method: Translate a single node, boxing or unboxing if needed. |
aoqi@0 | 2380 | */ |
aoqi@0 | 2381 | public <T extends JCTree> T translate(T tree, Type type) { |
aoqi@0 | 2382 | return (tree == null) ? null : boxIfNeeded(translate(tree), type); |
aoqi@0 | 2383 | } |
aoqi@0 | 2384 | |
aoqi@0 | 2385 | /** Visitor method: Translate tree. |
aoqi@0 | 2386 | */ |
aoqi@0 | 2387 | public <T extends JCTree> T translate(T tree, JCExpression enclOp) { |
aoqi@0 | 2388 | JCExpression prevEnclOp = this.enclOp; |
aoqi@0 | 2389 | this.enclOp = enclOp; |
aoqi@0 | 2390 | T res = translate(tree); |
aoqi@0 | 2391 | this.enclOp = prevEnclOp; |
aoqi@0 | 2392 | return res; |
aoqi@0 | 2393 | } |
aoqi@0 | 2394 | |
aoqi@0 | 2395 | /** Visitor method: Translate list of trees. |
aoqi@0 | 2396 | */ |
aoqi@0 | 2397 | public <T extends JCTree> List<T> translate(List<T> trees, JCExpression enclOp) { |
aoqi@0 | 2398 | JCExpression prevEnclOp = this.enclOp; |
aoqi@0 | 2399 | this.enclOp = enclOp; |
aoqi@0 | 2400 | List<T> res = translate(trees); |
aoqi@0 | 2401 | this.enclOp = prevEnclOp; |
aoqi@0 | 2402 | return res; |
aoqi@0 | 2403 | } |
aoqi@0 | 2404 | |
aoqi@0 | 2405 | /** Visitor method: Translate list of trees. |
aoqi@0 | 2406 | */ |
aoqi@0 | 2407 | public <T extends JCTree> List<T> translate(List<T> trees, Type type) { |
aoqi@0 | 2408 | if (trees == null) return null; |
aoqi@0 | 2409 | for (List<T> l = trees; l.nonEmpty(); l = l.tail) |
aoqi@0 | 2410 | l.head = translate(l.head, type); |
aoqi@0 | 2411 | return trees; |
aoqi@0 | 2412 | } |
aoqi@0 | 2413 | |
aoqi@0 | 2414 | public void visitTopLevel(JCCompilationUnit tree) { |
aoqi@0 | 2415 | if (needPackageInfoClass(tree)) { |
aoqi@0 | 2416 | Name name = names.package_info; |
aoqi@0 | 2417 | long flags = Flags.ABSTRACT | Flags.INTERFACE; |
aoqi@0 | 2418 | if (target.isPackageInfoSynthetic()) |
aoqi@0 | 2419 | // package-info is marked SYNTHETIC in JDK 1.6 and later releases |
aoqi@0 | 2420 | flags = flags | Flags.SYNTHETIC; |
aoqi@0 | 2421 | JCClassDecl packageAnnotationsClass |
aoqi@0 | 2422 | = make.ClassDef(make.Modifiers(flags, |
aoqi@0 | 2423 | tree.packageAnnotations), |
aoqi@0 | 2424 | name, List.<JCTypeParameter>nil(), |
aoqi@0 | 2425 | null, List.<JCExpression>nil(), List.<JCTree>nil()); |
aoqi@0 | 2426 | ClassSymbol c = tree.packge.package_info; |
aoqi@0 | 2427 | c.flags_field |= flags; |
aoqi@0 | 2428 | c.setAttributes(tree.packge); |
aoqi@0 | 2429 | ClassType ctype = (ClassType) c.type; |
aoqi@0 | 2430 | ctype.supertype_field = syms.objectType; |
aoqi@0 | 2431 | ctype.interfaces_field = List.nil(); |
aoqi@0 | 2432 | packageAnnotationsClass.sym = c; |
aoqi@0 | 2433 | |
aoqi@0 | 2434 | translated.append(packageAnnotationsClass); |
aoqi@0 | 2435 | } |
aoqi@0 | 2436 | } |
aoqi@0 | 2437 | // where |
aoqi@0 | 2438 | private boolean needPackageInfoClass(JCCompilationUnit tree) { |
aoqi@0 | 2439 | switch (pkginfoOpt) { |
aoqi@0 | 2440 | case ALWAYS: |
aoqi@0 | 2441 | return true; |
aoqi@0 | 2442 | case LEGACY: |
aoqi@0 | 2443 | return tree.packageAnnotations.nonEmpty(); |
aoqi@0 | 2444 | case NONEMPTY: |
aoqi@0 | 2445 | for (Attribute.Compound a : |
aoqi@0 | 2446 | tree.packge.getDeclarationAttributes()) { |
aoqi@0 | 2447 | Attribute.RetentionPolicy p = types.getRetention(a); |
aoqi@0 | 2448 | if (p != Attribute.RetentionPolicy.SOURCE) |
aoqi@0 | 2449 | return true; |
aoqi@0 | 2450 | } |
aoqi@0 | 2451 | return false; |
aoqi@0 | 2452 | } |
aoqi@0 | 2453 | throw new AssertionError(); |
aoqi@0 | 2454 | } |
aoqi@0 | 2455 | |
aoqi@0 | 2456 | public void visitClassDef(JCClassDecl tree) { |
aoqi@0 | 2457 | Env<AttrContext> prevEnv = attrEnv; |
aoqi@0 | 2458 | ClassSymbol currentClassPrev = currentClass; |
aoqi@0 | 2459 | MethodSymbol currentMethodSymPrev = currentMethodSym; |
aoqi@0 | 2460 | |
aoqi@0 | 2461 | currentClass = tree.sym; |
aoqi@0 | 2462 | currentMethodSym = null; |
aoqi@0 | 2463 | attrEnv = typeEnvs.remove(currentClass); |
aoqi@0 | 2464 | if (attrEnv == null) |
aoqi@0 | 2465 | attrEnv = prevEnv; |
aoqi@0 | 2466 | |
aoqi@0 | 2467 | classdefs.put(currentClass, tree); |
aoqi@0 | 2468 | |
aoqi@0 | 2469 | proxies = proxies.dup(currentClass); |
aoqi@0 | 2470 | List<VarSymbol> prevOuterThisStack = outerThisStack; |
aoqi@0 | 2471 | |
aoqi@0 | 2472 | // If this is an enum definition |
aoqi@0 | 2473 | if ((tree.mods.flags & ENUM) != 0 && |
aoqi@0 | 2474 | (types.supertype(currentClass.type).tsym.flags() & ENUM) == 0) |
aoqi@0 | 2475 | visitEnumDef(tree); |
aoqi@0 | 2476 | |
aoqi@0 | 2477 | // If this is a nested class, define a this$n field for |
aoqi@0 | 2478 | // it and add to proxies. |
aoqi@0 | 2479 | JCVariableDecl otdef = null; |
aoqi@0 | 2480 | if (currentClass.hasOuterInstance()) |
aoqi@0 | 2481 | otdef = outerThisDef(tree.pos, currentClass); |
aoqi@0 | 2482 | |
aoqi@0 | 2483 | // If this is a local class, define proxies for all its free variables. |
aoqi@0 | 2484 | List<JCVariableDecl> fvdefs = freevarDefs( |
aoqi@0 | 2485 | tree.pos, freevars(currentClass), currentClass); |
aoqi@0 | 2486 | |
aoqi@0 | 2487 | // Recursively translate superclass, interfaces. |
aoqi@0 | 2488 | tree.extending = translate(tree.extending); |
aoqi@0 | 2489 | tree.implementing = translate(tree.implementing); |
aoqi@0 | 2490 | |
aoqi@0 | 2491 | if (currentClass.isLocal()) { |
aoqi@0 | 2492 | ClassSymbol encl = currentClass.owner.enclClass(); |
aoqi@0 | 2493 | if (encl.trans_local == null) { |
aoqi@0 | 2494 | encl.trans_local = List.nil(); |
aoqi@0 | 2495 | } |
aoqi@0 | 2496 | encl.trans_local = encl.trans_local.prepend(currentClass); |
aoqi@0 | 2497 | } |
aoqi@0 | 2498 | |
aoqi@0 | 2499 | // Recursively translate members, taking into account that new members |
aoqi@0 | 2500 | // might be created during the translation and prepended to the member |
aoqi@0 | 2501 | // list `tree.defs'. |
aoqi@0 | 2502 | List<JCTree> seen = List.nil(); |
aoqi@0 | 2503 | while (tree.defs != seen) { |
aoqi@0 | 2504 | List<JCTree> unseen = tree.defs; |
aoqi@0 | 2505 | for (List<JCTree> l = unseen; l.nonEmpty() && l != seen; l = l.tail) { |
aoqi@0 | 2506 | JCTree outermostMemberDefPrev = outermostMemberDef; |
aoqi@0 | 2507 | if (outermostMemberDefPrev == null) outermostMemberDef = l.head; |
aoqi@0 | 2508 | l.head = translate(l.head); |
aoqi@0 | 2509 | outermostMemberDef = outermostMemberDefPrev; |
aoqi@0 | 2510 | } |
aoqi@0 | 2511 | seen = unseen; |
aoqi@0 | 2512 | } |
aoqi@0 | 2513 | |
aoqi@0 | 2514 | // Convert a protected modifier to public, mask static modifier. |
aoqi@0 | 2515 | if ((tree.mods.flags & PROTECTED) != 0) tree.mods.flags |= PUBLIC; |
aoqi@0 | 2516 | tree.mods.flags &= ClassFlags; |
aoqi@0 | 2517 | |
aoqi@0 | 2518 | // Convert name to flat representation, replacing '.' by '$'. |
aoqi@0 | 2519 | tree.name = Convert.shortName(currentClass.flatName()); |
aoqi@0 | 2520 | |
aoqi@0 | 2521 | // Add this$n and free variables proxy definitions to class. |
aoqi@0 | 2522 | |
aoqi@0 | 2523 | for (List<JCVariableDecl> l = fvdefs; l.nonEmpty(); l = l.tail) { |
aoqi@0 | 2524 | tree.defs = tree.defs.prepend(l.head); |
aoqi@0 | 2525 | enterSynthetic(tree.pos(), l.head.sym, currentClass.members()); |
aoqi@0 | 2526 | } |
aoqi@0 | 2527 | if (currentClass.hasOuterInstance()) { |
aoqi@0 | 2528 | tree.defs = tree.defs.prepend(otdef); |
aoqi@0 | 2529 | enterSynthetic(tree.pos(), otdef.sym, currentClass.members()); |
aoqi@0 | 2530 | } |
aoqi@0 | 2531 | |
aoqi@0 | 2532 | proxies = proxies.leave(); |
aoqi@0 | 2533 | outerThisStack = prevOuterThisStack; |
aoqi@0 | 2534 | |
aoqi@0 | 2535 | // Append translated tree to `translated' queue. |
aoqi@0 | 2536 | translated.append(tree); |
aoqi@0 | 2537 | |
aoqi@0 | 2538 | attrEnv = prevEnv; |
aoqi@0 | 2539 | currentClass = currentClassPrev; |
aoqi@0 | 2540 | currentMethodSym = currentMethodSymPrev; |
aoqi@0 | 2541 | |
aoqi@0 | 2542 | // Return empty block {} as a placeholder for an inner class. |
mcimadamore@2789 | 2543 | result = make_at(tree.pos()).Block(SYNTHETIC, List.<JCStatement>nil()); |
aoqi@0 | 2544 | } |
aoqi@0 | 2545 | |
aoqi@0 | 2546 | /** Translate an enum class. */ |
aoqi@0 | 2547 | private void visitEnumDef(JCClassDecl tree) { |
aoqi@0 | 2548 | make_at(tree.pos()); |
aoqi@0 | 2549 | |
aoqi@0 | 2550 | // add the supertype, if needed |
aoqi@0 | 2551 | if (tree.extending == null) |
aoqi@0 | 2552 | tree.extending = make.Type(types.supertype(tree.type)); |
aoqi@0 | 2553 | |
aoqi@0 | 2554 | // classOfType adds a cache field to tree.defs unless |
aoqi@0 | 2555 | // target.hasClassLiterals(). |
aoqi@0 | 2556 | JCExpression e_class = classOfType(tree.sym.type, tree.pos()). |
aoqi@0 | 2557 | setType(types.erasure(syms.classType)); |
aoqi@0 | 2558 | |
aoqi@0 | 2559 | // process each enumeration constant, adding implicit constructor parameters |
aoqi@0 | 2560 | int nextOrdinal = 0; |
aoqi@0 | 2561 | ListBuffer<JCExpression> values = new ListBuffer<JCExpression>(); |
aoqi@0 | 2562 | ListBuffer<JCTree> enumDefs = new ListBuffer<JCTree>(); |
aoqi@0 | 2563 | ListBuffer<JCTree> otherDefs = new ListBuffer<JCTree>(); |
aoqi@0 | 2564 | for (List<JCTree> defs = tree.defs; |
aoqi@0 | 2565 | defs.nonEmpty(); |
aoqi@0 | 2566 | defs=defs.tail) { |
aoqi@0 | 2567 | if (defs.head.hasTag(VARDEF) && (((JCVariableDecl) defs.head).mods.flags & ENUM) != 0) { |
aoqi@0 | 2568 | JCVariableDecl var = (JCVariableDecl)defs.head; |
aoqi@0 | 2569 | visitEnumConstantDef(var, nextOrdinal++); |
aoqi@0 | 2570 | values.append(make.QualIdent(var.sym)); |
aoqi@0 | 2571 | enumDefs.append(var); |
aoqi@0 | 2572 | } else { |
aoqi@0 | 2573 | otherDefs.append(defs.head); |
aoqi@0 | 2574 | } |
aoqi@0 | 2575 | } |
aoqi@0 | 2576 | |
aoqi@0 | 2577 | // private static final T[] #VALUES = { a, b, c }; |
aoqi@0 | 2578 | Name valuesName = names.fromString(target.syntheticNameChar() + "VALUES"); |
aoqi@0 | 2579 | while (tree.sym.members().lookup(valuesName).scope != null) // avoid name clash |
aoqi@0 | 2580 | valuesName = names.fromString(valuesName + "" + target.syntheticNameChar()); |
aoqi@0 | 2581 | Type arrayType = new ArrayType(types.erasure(tree.type), syms.arrayClass); |
aoqi@0 | 2582 | VarSymbol valuesVar = new VarSymbol(PRIVATE|FINAL|STATIC|SYNTHETIC, |
aoqi@0 | 2583 | valuesName, |
aoqi@0 | 2584 | arrayType, |
aoqi@0 | 2585 | tree.type.tsym); |
aoqi@0 | 2586 | JCNewArray newArray = make.NewArray(make.Type(types.erasure(tree.type)), |
aoqi@0 | 2587 | List.<JCExpression>nil(), |
aoqi@0 | 2588 | values.toList()); |
aoqi@0 | 2589 | newArray.type = arrayType; |
aoqi@0 | 2590 | enumDefs.append(make.VarDef(valuesVar, newArray)); |
aoqi@0 | 2591 | tree.sym.members().enter(valuesVar); |
aoqi@0 | 2592 | |
aoqi@0 | 2593 | Symbol valuesSym = lookupMethod(tree.pos(), names.values, |
aoqi@0 | 2594 | tree.type, List.<Type>nil()); |
aoqi@0 | 2595 | List<JCStatement> valuesBody; |
aoqi@0 | 2596 | if (useClone()) { |
aoqi@0 | 2597 | // return (T[]) $VALUES.clone(); |
aoqi@0 | 2598 | JCTypeCast valuesResult = |
aoqi@0 | 2599 | make.TypeCast(valuesSym.type.getReturnType(), |
aoqi@0 | 2600 | make.App(make.Select(make.Ident(valuesVar), |
aoqi@0 | 2601 | syms.arrayCloneMethod))); |
aoqi@0 | 2602 | valuesBody = List.<JCStatement>of(make.Return(valuesResult)); |
aoqi@0 | 2603 | } else { |
aoqi@0 | 2604 | // template: T[] $result = new T[$values.length]; |
aoqi@0 | 2605 | Name resultName = names.fromString(target.syntheticNameChar() + "result"); |
aoqi@0 | 2606 | while (tree.sym.members().lookup(resultName).scope != null) // avoid name clash |
aoqi@0 | 2607 | resultName = names.fromString(resultName + "" + target.syntheticNameChar()); |
aoqi@0 | 2608 | VarSymbol resultVar = new VarSymbol(FINAL|SYNTHETIC, |
aoqi@0 | 2609 | resultName, |
aoqi@0 | 2610 | arrayType, |
aoqi@0 | 2611 | valuesSym); |
aoqi@0 | 2612 | JCNewArray resultArray = make.NewArray(make.Type(types.erasure(tree.type)), |
aoqi@0 | 2613 | List.of(make.Select(make.Ident(valuesVar), syms.lengthVar)), |
aoqi@0 | 2614 | null); |
aoqi@0 | 2615 | resultArray.type = arrayType; |
aoqi@0 | 2616 | JCVariableDecl decl = make.VarDef(resultVar, resultArray); |
aoqi@0 | 2617 | |
aoqi@0 | 2618 | // template: System.arraycopy($VALUES, 0, $result, 0, $VALUES.length); |
aoqi@0 | 2619 | if (systemArraycopyMethod == null) { |
aoqi@0 | 2620 | systemArraycopyMethod = |
aoqi@0 | 2621 | new MethodSymbol(PUBLIC | STATIC, |
aoqi@0 | 2622 | names.fromString("arraycopy"), |
aoqi@0 | 2623 | new MethodType(List.<Type>of(syms.objectType, |
aoqi@0 | 2624 | syms.intType, |
aoqi@0 | 2625 | syms.objectType, |
aoqi@0 | 2626 | syms.intType, |
aoqi@0 | 2627 | syms.intType), |
aoqi@0 | 2628 | syms.voidType, |
aoqi@0 | 2629 | List.<Type>nil(), |
aoqi@0 | 2630 | syms.methodClass), |
aoqi@0 | 2631 | syms.systemType.tsym); |
aoqi@0 | 2632 | } |
aoqi@0 | 2633 | JCStatement copy = |
aoqi@0 | 2634 | make.Exec(make.App(make.Select(make.Ident(syms.systemType.tsym), |
aoqi@0 | 2635 | systemArraycopyMethod), |
aoqi@0 | 2636 | List.of(make.Ident(valuesVar), make.Literal(0), |
aoqi@0 | 2637 | make.Ident(resultVar), make.Literal(0), |
aoqi@0 | 2638 | make.Select(make.Ident(valuesVar), syms.lengthVar)))); |
aoqi@0 | 2639 | |
aoqi@0 | 2640 | // template: return $result; |
aoqi@0 | 2641 | JCStatement ret = make.Return(make.Ident(resultVar)); |
aoqi@0 | 2642 | valuesBody = List.<JCStatement>of(decl, copy, ret); |
aoqi@0 | 2643 | } |
aoqi@0 | 2644 | |
aoqi@0 | 2645 | JCMethodDecl valuesDef = |
aoqi@0 | 2646 | make.MethodDef((MethodSymbol)valuesSym, make.Block(0, valuesBody)); |
aoqi@0 | 2647 | |
aoqi@0 | 2648 | enumDefs.append(valuesDef); |
aoqi@0 | 2649 | |
aoqi@0 | 2650 | if (debugLower) |
aoqi@0 | 2651 | System.err.println(tree.sym + ".valuesDef = " + valuesDef); |
aoqi@0 | 2652 | |
aoqi@0 | 2653 | /** The template for the following code is: |
aoqi@0 | 2654 | * |
aoqi@0 | 2655 | * public static E valueOf(String name) { |
aoqi@0 | 2656 | * return (E)Enum.valueOf(E.class, name); |
aoqi@0 | 2657 | * } |
aoqi@0 | 2658 | * |
aoqi@0 | 2659 | * where E is tree.sym |
aoqi@0 | 2660 | */ |
aoqi@0 | 2661 | MethodSymbol valueOfSym = lookupMethod(tree.pos(), |
aoqi@0 | 2662 | names.valueOf, |
aoqi@0 | 2663 | tree.sym.type, |
aoqi@0 | 2664 | List.of(syms.stringType)); |
aoqi@0 | 2665 | Assert.check((valueOfSym.flags() & STATIC) != 0); |
aoqi@0 | 2666 | VarSymbol nameArgSym = valueOfSym.params.head; |
aoqi@0 | 2667 | JCIdent nameVal = make.Ident(nameArgSym); |
aoqi@0 | 2668 | JCStatement enum_ValueOf = |
aoqi@0 | 2669 | make.Return(make.TypeCast(tree.sym.type, |
aoqi@0 | 2670 | makeCall(make.Ident(syms.enumSym), |
aoqi@0 | 2671 | names.valueOf, |
aoqi@0 | 2672 | List.of(e_class, nameVal)))); |
aoqi@0 | 2673 | JCMethodDecl valueOf = make.MethodDef(valueOfSym, |
aoqi@0 | 2674 | make.Block(0, List.of(enum_ValueOf))); |
aoqi@0 | 2675 | nameVal.sym = valueOf.params.head.sym; |
aoqi@0 | 2676 | if (debugLower) |
aoqi@0 | 2677 | System.err.println(tree.sym + ".valueOf = " + valueOf); |
aoqi@0 | 2678 | enumDefs.append(valueOf); |
aoqi@0 | 2679 | |
aoqi@0 | 2680 | enumDefs.appendList(otherDefs.toList()); |
aoqi@0 | 2681 | tree.defs = enumDefs.toList(); |
aoqi@0 | 2682 | } |
aoqi@0 | 2683 | // where |
aoqi@0 | 2684 | private MethodSymbol systemArraycopyMethod; |
aoqi@0 | 2685 | private boolean useClone() { |
aoqi@0 | 2686 | try { |
aoqi@0 | 2687 | Scope.Entry e = syms.objectType.tsym.members().lookup(names.clone); |
aoqi@0 | 2688 | return (e.sym != null); |
aoqi@0 | 2689 | } |
aoqi@0 | 2690 | catch (CompletionFailure e) { |
aoqi@0 | 2691 | return false; |
aoqi@0 | 2692 | } |
aoqi@0 | 2693 | } |
aoqi@0 | 2694 | |
aoqi@0 | 2695 | /** Translate an enumeration constant and its initializer. */ |
aoqi@0 | 2696 | private void visitEnumConstantDef(JCVariableDecl var, int ordinal) { |
aoqi@0 | 2697 | JCNewClass varDef = (JCNewClass)var.init; |
aoqi@0 | 2698 | varDef.args = varDef.args. |
aoqi@0 | 2699 | prepend(makeLit(syms.intType, ordinal)). |
aoqi@0 | 2700 | prepend(makeLit(syms.stringType, var.name.toString())); |
aoqi@0 | 2701 | } |
aoqi@0 | 2702 | |
aoqi@0 | 2703 | public void visitMethodDef(JCMethodDecl tree) { |
aoqi@0 | 2704 | if (tree.name == names.init && (currentClass.flags_field&ENUM) != 0) { |
aoqi@0 | 2705 | // Add "String $enum$name, int $enum$ordinal" to the beginning of the |
aoqi@0 | 2706 | // argument list for each constructor of an enum. |
aoqi@0 | 2707 | JCVariableDecl nameParam = make_at(tree.pos()). |
aoqi@0 | 2708 | Param(names.fromString(target.syntheticNameChar() + |
aoqi@0 | 2709 | "enum" + target.syntheticNameChar() + "name"), |
aoqi@0 | 2710 | syms.stringType, tree.sym); |
aoqi@0 | 2711 | nameParam.mods.flags |= SYNTHETIC; nameParam.sym.flags_field |= SYNTHETIC; |
aoqi@0 | 2712 | JCVariableDecl ordParam = make. |
aoqi@0 | 2713 | Param(names.fromString(target.syntheticNameChar() + |
aoqi@0 | 2714 | "enum" + target.syntheticNameChar() + |
aoqi@0 | 2715 | "ordinal"), |
aoqi@0 | 2716 | syms.intType, tree.sym); |
aoqi@0 | 2717 | ordParam.mods.flags |= SYNTHETIC; ordParam.sym.flags_field |= SYNTHETIC; |
aoqi@0 | 2718 | |
aoqi@0 | 2719 | tree.params = tree.params.prepend(ordParam).prepend(nameParam); |
aoqi@0 | 2720 | |
aoqi@0 | 2721 | MethodSymbol m = tree.sym; |
aoqi@0 | 2722 | m.extraParams = m.extraParams.prepend(ordParam.sym); |
aoqi@0 | 2723 | m.extraParams = m.extraParams.prepend(nameParam.sym); |
aoqi@0 | 2724 | Type olderasure = m.erasure(types); |
aoqi@0 | 2725 | m.erasure_field = new MethodType( |
aoqi@0 | 2726 | olderasure.getParameterTypes().prepend(syms.intType).prepend(syms.stringType), |
aoqi@0 | 2727 | olderasure.getReturnType(), |
aoqi@0 | 2728 | olderasure.getThrownTypes(), |
aoqi@0 | 2729 | syms.methodClass); |
aoqi@0 | 2730 | } |
aoqi@0 | 2731 | |
aoqi@0 | 2732 | JCMethodDecl prevMethodDef = currentMethodDef; |
aoqi@0 | 2733 | MethodSymbol prevMethodSym = currentMethodSym; |
aoqi@0 | 2734 | try { |
aoqi@0 | 2735 | currentMethodDef = tree; |
aoqi@0 | 2736 | currentMethodSym = tree.sym; |
aoqi@0 | 2737 | visitMethodDefInternal(tree); |
aoqi@0 | 2738 | } finally { |
aoqi@0 | 2739 | currentMethodDef = prevMethodDef; |
aoqi@0 | 2740 | currentMethodSym = prevMethodSym; |
aoqi@0 | 2741 | } |
aoqi@0 | 2742 | } |
aoqi@0 | 2743 | //where |
aoqi@0 | 2744 | private void visitMethodDefInternal(JCMethodDecl tree) { |
aoqi@0 | 2745 | if (tree.name == names.init && |
aoqi@0 | 2746 | (currentClass.isInner() || currentClass.isLocal())) { |
aoqi@0 | 2747 | // We are seeing a constructor of an inner class. |
aoqi@0 | 2748 | MethodSymbol m = tree.sym; |
aoqi@0 | 2749 | |
aoqi@0 | 2750 | // Push a new proxy scope for constructor parameters. |
aoqi@0 | 2751 | // and create definitions for any this$n and proxy parameters. |
aoqi@0 | 2752 | proxies = proxies.dup(m); |
aoqi@0 | 2753 | List<VarSymbol> prevOuterThisStack = outerThisStack; |
aoqi@0 | 2754 | List<VarSymbol> fvs = freevars(currentClass); |
aoqi@0 | 2755 | JCVariableDecl otdef = null; |
aoqi@0 | 2756 | if (currentClass.hasOuterInstance()) |
aoqi@0 | 2757 | otdef = outerThisDef(tree.pos, m); |
aoqi@0 | 2758 | List<JCVariableDecl> fvdefs = freevarDefs(tree.pos, fvs, m, PARAMETER); |
aoqi@0 | 2759 | |
aoqi@0 | 2760 | // Recursively translate result type, parameters and thrown list. |
aoqi@0 | 2761 | tree.restype = translate(tree.restype); |
aoqi@0 | 2762 | tree.params = translateVarDefs(tree.params); |
aoqi@0 | 2763 | tree.thrown = translate(tree.thrown); |
aoqi@0 | 2764 | |
aoqi@0 | 2765 | // when compiling stubs, don't process body |
aoqi@0 | 2766 | if (tree.body == null) { |
aoqi@0 | 2767 | result = tree; |
aoqi@0 | 2768 | return; |
aoqi@0 | 2769 | } |
aoqi@0 | 2770 | |
aoqi@0 | 2771 | // Add this$n (if needed) in front of and free variables behind |
aoqi@0 | 2772 | // constructor parameter list. |
aoqi@0 | 2773 | tree.params = tree.params.appendList(fvdefs); |
aoqi@0 | 2774 | if (currentClass.hasOuterInstance()) |
aoqi@0 | 2775 | tree.params = tree.params.prepend(otdef); |
aoqi@0 | 2776 | |
aoqi@0 | 2777 | // If this is an initial constructor, i.e., it does not start with |
aoqi@0 | 2778 | // this(...), insert initializers for this$n and proxies |
aoqi@0 | 2779 | // before (pre-1.4, after) the call to superclass constructor. |
aoqi@0 | 2780 | JCStatement selfCall = translate(tree.body.stats.head); |
aoqi@0 | 2781 | |
aoqi@0 | 2782 | List<JCStatement> added = List.nil(); |
aoqi@0 | 2783 | if (fvs.nonEmpty()) { |
aoqi@0 | 2784 | List<Type> addedargtypes = List.nil(); |
aoqi@0 | 2785 | for (List<VarSymbol> l = fvs; l.nonEmpty(); l = l.tail) { |
aoqi@0 | 2786 | if (TreeInfo.isInitialConstructor(tree)) { |
aoqi@0 | 2787 | final Name pName = proxyName(l.head.name); |
aoqi@0 | 2788 | m.capturedLocals = |
aoqi@0 | 2789 | m.capturedLocals.append((VarSymbol) |
aoqi@0 | 2790 | (proxies.lookup(pName).sym)); |
aoqi@0 | 2791 | added = added.prepend( |
aoqi@0 | 2792 | initField(tree.body.pos, pName)); |
aoqi@0 | 2793 | } |
aoqi@0 | 2794 | addedargtypes = addedargtypes.prepend(l.head.erasure(types)); |
aoqi@0 | 2795 | } |
aoqi@0 | 2796 | Type olderasure = m.erasure(types); |
aoqi@0 | 2797 | m.erasure_field = new MethodType( |
aoqi@0 | 2798 | olderasure.getParameterTypes().appendList(addedargtypes), |
aoqi@0 | 2799 | olderasure.getReturnType(), |
aoqi@0 | 2800 | olderasure.getThrownTypes(), |
aoqi@0 | 2801 | syms.methodClass); |
aoqi@0 | 2802 | } |
aoqi@0 | 2803 | if (currentClass.hasOuterInstance() && |
aoqi@0 | 2804 | TreeInfo.isInitialConstructor(tree)) |
aoqi@0 | 2805 | { |
aoqi@0 | 2806 | added = added.prepend(initOuterThis(tree.body.pos)); |
aoqi@0 | 2807 | } |
aoqi@0 | 2808 | |
aoqi@0 | 2809 | // pop local variables from proxy stack |
aoqi@0 | 2810 | proxies = proxies.leave(); |
aoqi@0 | 2811 | |
aoqi@0 | 2812 | // recursively translate following local statements and |
aoqi@0 | 2813 | // combine with this- or super-call |
aoqi@0 | 2814 | List<JCStatement> stats = translate(tree.body.stats.tail); |
aoqi@0 | 2815 | if (target.initializeFieldsBeforeSuper()) |
aoqi@0 | 2816 | tree.body.stats = stats.prepend(selfCall).prependList(added); |
aoqi@0 | 2817 | else |
aoqi@0 | 2818 | tree.body.stats = stats.prependList(added).prepend(selfCall); |
aoqi@0 | 2819 | |
aoqi@0 | 2820 | outerThisStack = prevOuterThisStack; |
aoqi@0 | 2821 | } else { |
aoqi@0 | 2822 | Map<Symbol, Symbol> prevLambdaTranslationMap = |
aoqi@0 | 2823 | lambdaTranslationMap; |
aoqi@0 | 2824 | try { |
aoqi@0 | 2825 | lambdaTranslationMap = (tree.sym.flags() & SYNTHETIC) != 0 && |
aoqi@0 | 2826 | tree.sym.name.startsWith(names.lambda) ? |
aoqi@0 | 2827 | makeTranslationMap(tree) : null; |
aoqi@0 | 2828 | super.visitMethodDef(tree); |
aoqi@0 | 2829 | } finally { |
aoqi@0 | 2830 | lambdaTranslationMap = prevLambdaTranslationMap; |
aoqi@0 | 2831 | } |
aoqi@0 | 2832 | } |
aoqi@0 | 2833 | result = tree; |
aoqi@0 | 2834 | } |
aoqi@0 | 2835 | //where |
aoqi@0 | 2836 | private Map<Symbol, Symbol> makeTranslationMap(JCMethodDecl tree) { |
aoqi@0 | 2837 | Map<Symbol, Symbol> translationMap = new HashMap<Symbol,Symbol>(); |
aoqi@0 | 2838 | for (JCVariableDecl vd : tree.params) { |
aoqi@0 | 2839 | Symbol p = vd.sym; |
aoqi@0 | 2840 | if (p != p.baseSymbol()) { |
aoqi@0 | 2841 | translationMap.put(p.baseSymbol(), p); |
aoqi@0 | 2842 | } |
aoqi@0 | 2843 | } |
aoqi@0 | 2844 | return translationMap; |
aoqi@0 | 2845 | } |
aoqi@0 | 2846 | |
aoqi@0 | 2847 | public void visitAnnotatedType(JCAnnotatedType tree) { |
aoqi@0 | 2848 | // No need to retain type annotations in the tree |
aoqi@0 | 2849 | // tree.annotations = translate(tree.annotations); |
aoqi@0 | 2850 | tree.annotations = List.nil(); |
aoqi@0 | 2851 | tree.underlyingType = translate(tree.underlyingType); |
aoqi@0 | 2852 | // but maintain type annotations in the type. |
aoqi@0 | 2853 | if (tree.type.isAnnotated()) { |
aoqi@0 | 2854 | tree.type = tree.underlyingType.type.unannotatedType().annotatedType(tree.type.getAnnotationMirrors()); |
aoqi@0 | 2855 | } else if (tree.underlyingType.type.isAnnotated()) { |
aoqi@0 | 2856 | tree.type = tree.underlyingType.type; |
aoqi@0 | 2857 | } |
aoqi@0 | 2858 | result = tree; |
aoqi@0 | 2859 | } |
aoqi@0 | 2860 | |
aoqi@0 | 2861 | public void visitTypeCast(JCTypeCast tree) { |
aoqi@0 | 2862 | tree.clazz = translate(tree.clazz); |
aoqi@0 | 2863 | if (tree.type.isPrimitive() != tree.expr.type.isPrimitive()) |
aoqi@0 | 2864 | tree.expr = translate(tree.expr, tree.type); |
aoqi@0 | 2865 | else |
aoqi@0 | 2866 | tree.expr = translate(tree.expr); |
aoqi@0 | 2867 | result = tree; |
aoqi@0 | 2868 | } |
aoqi@0 | 2869 | |
aoqi@0 | 2870 | public void visitNewClass(JCNewClass tree) { |
aoqi@0 | 2871 | ClassSymbol c = (ClassSymbol)tree.constructor.owner; |
aoqi@0 | 2872 | |
aoqi@0 | 2873 | // Box arguments, if necessary |
aoqi@0 | 2874 | boolean isEnum = (tree.constructor.owner.flags() & ENUM) != 0; |
aoqi@0 | 2875 | List<Type> argTypes = tree.constructor.type.getParameterTypes(); |
aoqi@0 | 2876 | if (isEnum) argTypes = argTypes.prepend(syms.intType).prepend(syms.stringType); |
aoqi@0 | 2877 | tree.args = boxArgs(argTypes, tree.args, tree.varargsElement); |
aoqi@0 | 2878 | tree.varargsElement = null; |
aoqi@0 | 2879 | |
aoqi@0 | 2880 | // If created class is local, add free variables after |
aoqi@0 | 2881 | // explicit constructor arguments. |
aoqi@0 | 2882 | if (c.isLocal()) { |
aoqi@0 | 2883 | tree.args = tree.args.appendList(loadFreevars(tree.pos(), freevars(c))); |
aoqi@0 | 2884 | } |
aoqi@0 | 2885 | |
aoqi@0 | 2886 | // If an access constructor is used, append null as a last argument. |
aoqi@0 | 2887 | Symbol constructor = accessConstructor(tree.pos(), tree.constructor); |
aoqi@0 | 2888 | if (constructor != tree.constructor) { |
aoqi@0 | 2889 | tree.args = tree.args.append(makeNull()); |
aoqi@0 | 2890 | tree.constructor = constructor; |
aoqi@0 | 2891 | } |
aoqi@0 | 2892 | |
aoqi@0 | 2893 | // If created class has an outer instance, and new is qualified, pass |
aoqi@0 | 2894 | // qualifier as first argument. If new is not qualified, pass the |
aoqi@0 | 2895 | // correct outer instance as first argument. |
aoqi@0 | 2896 | if (c.hasOuterInstance()) { |
aoqi@0 | 2897 | JCExpression thisArg; |
aoqi@0 | 2898 | if (tree.encl != null) { |
aoqi@0 | 2899 | thisArg = attr.makeNullCheck(translate(tree.encl)); |
aoqi@0 | 2900 | thisArg.type = tree.encl.type; |
aoqi@0 | 2901 | } else if (c.isLocal()) { |
aoqi@0 | 2902 | // local class |
aoqi@0 | 2903 | thisArg = makeThis(tree.pos(), c.type.getEnclosingType().tsym); |
aoqi@0 | 2904 | } else { |
aoqi@0 | 2905 | // nested class |
aoqi@0 | 2906 | thisArg = makeOwnerThis(tree.pos(), c, false); |
aoqi@0 | 2907 | } |
aoqi@0 | 2908 | tree.args = tree.args.prepend(thisArg); |
aoqi@0 | 2909 | } |
aoqi@0 | 2910 | tree.encl = null; |
aoqi@0 | 2911 | |
aoqi@0 | 2912 | // If we have an anonymous class, create its flat version, rather |
aoqi@0 | 2913 | // than the class or interface following new. |
aoqi@0 | 2914 | if (tree.def != null) { |
aoqi@0 | 2915 | translate(tree.def); |
aoqi@0 | 2916 | tree.clazz = access(make_at(tree.clazz.pos()).Ident(tree.def.sym)); |
aoqi@0 | 2917 | tree.def = null; |
aoqi@0 | 2918 | } else { |
aoqi@0 | 2919 | tree.clazz = access(c, tree.clazz, enclOp, false); |
aoqi@0 | 2920 | } |
aoqi@0 | 2921 | result = tree; |
aoqi@0 | 2922 | } |
aoqi@0 | 2923 | |
aoqi@0 | 2924 | // Simplify conditionals with known constant controlling expressions. |
aoqi@0 | 2925 | // This allows us to avoid generating supporting declarations for |
aoqi@0 | 2926 | // the dead code, which will not be eliminated during code generation. |
aoqi@0 | 2927 | // Note that Flow.isFalse and Flow.isTrue only return true |
aoqi@0 | 2928 | // for constant expressions in the sense of JLS 15.27, which |
aoqi@0 | 2929 | // are guaranteed to have no side-effects. More aggressive |
aoqi@0 | 2930 | // constant propagation would require that we take care to |
aoqi@0 | 2931 | // preserve possible side-effects in the condition expression. |
aoqi@0 | 2932 | |
aoqi@0 | 2933 | /** Visitor method for conditional expressions. |
aoqi@0 | 2934 | */ |
aoqi@0 | 2935 | @Override |
aoqi@0 | 2936 | public void visitConditional(JCConditional tree) { |
aoqi@0 | 2937 | JCTree cond = tree.cond = translate(tree.cond, syms.booleanType); |
aoqi@0 | 2938 | if (cond.type.isTrue()) { |
aoqi@0 | 2939 | result = convert(translate(tree.truepart, tree.type), tree.type); |
aoqi@0 | 2940 | addPrunedInfo(cond); |
aoqi@0 | 2941 | } else if (cond.type.isFalse()) { |
aoqi@0 | 2942 | result = convert(translate(tree.falsepart, tree.type), tree.type); |
aoqi@0 | 2943 | addPrunedInfo(cond); |
aoqi@0 | 2944 | } else { |
aoqi@0 | 2945 | // Condition is not a compile-time constant. |
aoqi@0 | 2946 | tree.truepart = translate(tree.truepart, tree.type); |
aoqi@0 | 2947 | tree.falsepart = translate(tree.falsepart, tree.type); |
aoqi@0 | 2948 | result = tree; |
aoqi@0 | 2949 | } |
aoqi@0 | 2950 | } |
aoqi@0 | 2951 | //where |
aoqi@0 | 2952 | private JCTree convert(JCTree tree, Type pt) { |
aoqi@0 | 2953 | if (tree.type == pt || tree.type.hasTag(BOT)) |
aoqi@0 | 2954 | return tree; |
aoqi@0 | 2955 | JCTree result = make_at(tree.pos()).TypeCast(make.Type(pt), (JCExpression)tree); |
aoqi@0 | 2956 | result.type = (tree.type.constValue() != null) ? cfolder.coerce(tree.type, pt) |
aoqi@0 | 2957 | : pt; |
aoqi@0 | 2958 | return result; |
aoqi@0 | 2959 | } |
aoqi@0 | 2960 | |
aoqi@0 | 2961 | /** Visitor method for if statements. |
aoqi@0 | 2962 | */ |
aoqi@0 | 2963 | public void visitIf(JCIf tree) { |
aoqi@0 | 2964 | JCTree cond = tree.cond = translate(tree.cond, syms.booleanType); |
aoqi@0 | 2965 | if (cond.type.isTrue()) { |
aoqi@0 | 2966 | result = translate(tree.thenpart); |
aoqi@0 | 2967 | addPrunedInfo(cond); |
aoqi@0 | 2968 | } else if (cond.type.isFalse()) { |
aoqi@0 | 2969 | if (tree.elsepart != null) { |
aoqi@0 | 2970 | result = translate(tree.elsepart); |
aoqi@0 | 2971 | } else { |
aoqi@0 | 2972 | result = make.Skip(); |
aoqi@0 | 2973 | } |
aoqi@0 | 2974 | addPrunedInfo(cond); |
aoqi@0 | 2975 | } else { |
aoqi@0 | 2976 | // Condition is not a compile-time constant. |
aoqi@0 | 2977 | tree.thenpart = translate(tree.thenpart); |
aoqi@0 | 2978 | tree.elsepart = translate(tree.elsepart); |
aoqi@0 | 2979 | result = tree; |
aoqi@0 | 2980 | } |
aoqi@0 | 2981 | } |
aoqi@0 | 2982 | |
aoqi@0 | 2983 | /** Visitor method for assert statements. Translate them away. |
aoqi@0 | 2984 | */ |
aoqi@0 | 2985 | public void visitAssert(JCAssert tree) { |
aoqi@0 | 2986 | DiagnosticPosition detailPos = (tree.detail == null) ? tree.pos() : tree.detail.pos(); |
aoqi@0 | 2987 | tree.cond = translate(tree.cond, syms.booleanType); |
aoqi@0 | 2988 | if (!tree.cond.type.isTrue()) { |
aoqi@0 | 2989 | JCExpression cond = assertFlagTest(tree.pos()); |
aoqi@0 | 2990 | List<JCExpression> exnArgs = (tree.detail == null) ? |
aoqi@0 | 2991 | List.<JCExpression>nil() : List.of(translate(tree.detail)); |
aoqi@0 | 2992 | if (!tree.cond.type.isFalse()) { |
aoqi@0 | 2993 | cond = makeBinary |
aoqi@0 | 2994 | (AND, |
aoqi@0 | 2995 | cond, |
aoqi@0 | 2996 | makeUnary(NOT, tree.cond)); |
aoqi@0 | 2997 | } |
aoqi@0 | 2998 | result = |
aoqi@0 | 2999 | make.If(cond, |
aoqi@0 | 3000 | make_at(tree). |
aoqi@0 | 3001 | Throw(makeNewClass(syms.assertionErrorType, exnArgs)), |
aoqi@0 | 3002 | null); |
aoqi@0 | 3003 | } else { |
aoqi@0 | 3004 | result = make.Skip(); |
aoqi@0 | 3005 | } |
aoqi@0 | 3006 | } |
aoqi@0 | 3007 | |
aoqi@0 | 3008 | public void visitApply(JCMethodInvocation tree) { |
aoqi@0 | 3009 | Symbol meth = TreeInfo.symbol(tree.meth); |
aoqi@0 | 3010 | List<Type> argtypes = meth.type.getParameterTypes(); |
aoqi@0 | 3011 | if (allowEnums && |
aoqi@0 | 3012 | meth.name==names.init && |
aoqi@0 | 3013 | meth.owner == syms.enumSym) |
aoqi@0 | 3014 | argtypes = argtypes.tail.tail; |
aoqi@0 | 3015 | tree.args = boxArgs(argtypes, tree.args, tree.varargsElement); |
aoqi@0 | 3016 | tree.varargsElement = null; |
aoqi@0 | 3017 | Name methName = TreeInfo.name(tree.meth); |
aoqi@0 | 3018 | if (meth.name==names.init) { |
aoqi@0 | 3019 | // We are seeing a this(...) or super(...) constructor call. |
aoqi@0 | 3020 | // If an access constructor is used, append null as a last argument. |
aoqi@0 | 3021 | Symbol constructor = accessConstructor(tree.pos(), meth); |
aoqi@0 | 3022 | if (constructor != meth) { |
aoqi@0 | 3023 | tree.args = tree.args.append(makeNull()); |
aoqi@0 | 3024 | TreeInfo.setSymbol(tree.meth, constructor); |
aoqi@0 | 3025 | } |
aoqi@0 | 3026 | |
aoqi@0 | 3027 | // If we are calling a constructor of a local class, add |
aoqi@0 | 3028 | // free variables after explicit constructor arguments. |
aoqi@0 | 3029 | ClassSymbol c = (ClassSymbol)constructor.owner; |
aoqi@0 | 3030 | if (c.isLocal()) { |
aoqi@0 | 3031 | tree.args = tree.args.appendList(loadFreevars(tree.pos(), freevars(c))); |
aoqi@0 | 3032 | } |
aoqi@0 | 3033 | |
aoqi@0 | 3034 | // If we are calling a constructor of an enum class, pass |
aoqi@0 | 3035 | // along the name and ordinal arguments |
aoqi@0 | 3036 | if ((c.flags_field&ENUM) != 0 || c.getQualifiedName() == names.java_lang_Enum) { |
aoqi@0 | 3037 | List<JCVariableDecl> params = currentMethodDef.params; |
aoqi@0 | 3038 | if (currentMethodSym.owner.hasOuterInstance()) |
aoqi@0 | 3039 | params = params.tail; // drop this$n |
aoqi@0 | 3040 | tree.args = tree.args |
aoqi@0 | 3041 | .prepend(make_at(tree.pos()).Ident(params.tail.head.sym)) // ordinal |
aoqi@0 | 3042 | .prepend(make.Ident(params.head.sym)); // name |
aoqi@0 | 3043 | } |
aoqi@0 | 3044 | |
aoqi@0 | 3045 | // If we are calling a constructor of a class with an outer |
aoqi@0 | 3046 | // instance, and the call |
aoqi@0 | 3047 | // is qualified, pass qualifier as first argument in front of |
aoqi@0 | 3048 | // the explicit constructor arguments. If the call |
aoqi@0 | 3049 | // is not qualified, pass the correct outer instance as |
aoqi@0 | 3050 | // first argument. |
aoqi@0 | 3051 | if (c.hasOuterInstance()) { |
aoqi@0 | 3052 | JCExpression thisArg; |
aoqi@0 | 3053 | if (tree.meth.hasTag(SELECT)) { |
aoqi@0 | 3054 | thisArg = attr. |
aoqi@0 | 3055 | makeNullCheck(translate(((JCFieldAccess) tree.meth).selected)); |
aoqi@0 | 3056 | tree.meth = make.Ident(constructor); |
aoqi@0 | 3057 | ((JCIdent) tree.meth).name = methName; |
aoqi@0 | 3058 | } else if (c.isLocal() || methName == names._this){ |
aoqi@0 | 3059 | // local class or this() call |
aoqi@0 | 3060 | thisArg = makeThis(tree.meth.pos(), c.type.getEnclosingType().tsym); |
aoqi@0 | 3061 | } else { |
aoqi@0 | 3062 | // super() call of nested class - never pick 'this' |
aoqi@0 | 3063 | thisArg = makeOwnerThisN(tree.meth.pos(), c, false); |
aoqi@0 | 3064 | } |
aoqi@0 | 3065 | tree.args = tree.args.prepend(thisArg); |
aoqi@0 | 3066 | } |
aoqi@0 | 3067 | } else { |
aoqi@0 | 3068 | // We are seeing a normal method invocation; translate this as usual. |
aoqi@0 | 3069 | tree.meth = translate(tree.meth); |
aoqi@0 | 3070 | |
aoqi@0 | 3071 | // If the translated method itself is an Apply tree, we are |
aoqi@0 | 3072 | // seeing an access method invocation. In this case, append |
aoqi@0 | 3073 | // the method arguments to the arguments of the access method. |
aoqi@0 | 3074 | if (tree.meth.hasTag(APPLY)) { |
aoqi@0 | 3075 | JCMethodInvocation app = (JCMethodInvocation)tree.meth; |
aoqi@0 | 3076 | app.args = tree.args.prependList(app.args); |
aoqi@0 | 3077 | result = app; |
aoqi@0 | 3078 | return; |
aoqi@0 | 3079 | } |
aoqi@0 | 3080 | } |
aoqi@0 | 3081 | result = tree; |
aoqi@0 | 3082 | } |
aoqi@0 | 3083 | |
aoqi@0 | 3084 | List<JCExpression> boxArgs(List<Type> parameters, List<JCExpression> _args, Type varargsElement) { |
aoqi@0 | 3085 | List<JCExpression> args = _args; |
aoqi@0 | 3086 | if (parameters.isEmpty()) return args; |
aoqi@0 | 3087 | boolean anyChanges = false; |
aoqi@0 | 3088 | ListBuffer<JCExpression> result = new ListBuffer<JCExpression>(); |
aoqi@0 | 3089 | while (parameters.tail.nonEmpty()) { |
aoqi@0 | 3090 | JCExpression arg = translate(args.head, parameters.head); |
aoqi@0 | 3091 | anyChanges |= (arg != args.head); |
aoqi@0 | 3092 | result.append(arg); |
aoqi@0 | 3093 | args = args.tail; |
aoqi@0 | 3094 | parameters = parameters.tail; |
aoqi@0 | 3095 | } |
aoqi@0 | 3096 | Type parameter = parameters.head; |
aoqi@0 | 3097 | if (varargsElement != null) { |
aoqi@0 | 3098 | anyChanges = true; |
aoqi@0 | 3099 | ListBuffer<JCExpression> elems = new ListBuffer<JCExpression>(); |
aoqi@0 | 3100 | while (args.nonEmpty()) { |
aoqi@0 | 3101 | JCExpression arg = translate(args.head, varargsElement); |
aoqi@0 | 3102 | elems.append(arg); |
aoqi@0 | 3103 | args = args.tail; |
aoqi@0 | 3104 | } |
aoqi@0 | 3105 | JCNewArray boxedArgs = make.NewArray(make.Type(varargsElement), |
aoqi@0 | 3106 | List.<JCExpression>nil(), |
aoqi@0 | 3107 | elems.toList()); |
aoqi@0 | 3108 | boxedArgs.type = new ArrayType(varargsElement, syms.arrayClass); |
aoqi@0 | 3109 | result.append(boxedArgs); |
aoqi@0 | 3110 | } else { |
aoqi@0 | 3111 | if (args.length() != 1) throw new AssertionError(args); |
aoqi@0 | 3112 | JCExpression arg = translate(args.head, parameter); |
aoqi@0 | 3113 | anyChanges |= (arg != args.head); |
aoqi@0 | 3114 | result.append(arg); |
aoqi@0 | 3115 | if (!anyChanges) return _args; |
aoqi@0 | 3116 | } |
aoqi@0 | 3117 | return result.toList(); |
aoqi@0 | 3118 | } |
aoqi@0 | 3119 | |
aoqi@0 | 3120 | /** Expand a boxing or unboxing conversion if needed. */ |
aoqi@0 | 3121 | @SuppressWarnings("unchecked") // XXX unchecked |
aoqi@0 | 3122 | <T extends JCTree> T boxIfNeeded(T tree, Type type) { |
aoqi@0 | 3123 | boolean havePrimitive = tree.type.isPrimitive(); |
aoqi@0 | 3124 | if (havePrimitive == type.isPrimitive()) |
aoqi@0 | 3125 | return tree; |
aoqi@0 | 3126 | if (havePrimitive) { |
aoqi@0 | 3127 | Type unboxedTarget = types.unboxedType(type); |
aoqi@0 | 3128 | if (!unboxedTarget.hasTag(NONE)) { |
aoqi@0 | 3129 | if (!types.isSubtype(tree.type, unboxedTarget)) //e.g. Character c = 89; |
aoqi@0 | 3130 | tree.type = unboxedTarget.constType(tree.type.constValue()); |
aoqi@0 | 3131 | return (T)boxPrimitive((JCExpression)tree, type); |
aoqi@0 | 3132 | } else { |
aoqi@0 | 3133 | tree = (T)boxPrimitive((JCExpression)tree); |
aoqi@0 | 3134 | } |
aoqi@0 | 3135 | } else { |
aoqi@0 | 3136 | tree = (T)unbox((JCExpression)tree, type); |
aoqi@0 | 3137 | } |
aoqi@0 | 3138 | return tree; |
aoqi@0 | 3139 | } |
aoqi@0 | 3140 | |
aoqi@0 | 3141 | /** Box up a single primitive expression. */ |
aoqi@0 | 3142 | JCExpression boxPrimitive(JCExpression tree) { |
aoqi@0 | 3143 | return boxPrimitive(tree, types.boxedClass(tree.type).type); |
aoqi@0 | 3144 | } |
aoqi@0 | 3145 | |
aoqi@0 | 3146 | /** Box up a single primitive expression. */ |
aoqi@0 | 3147 | JCExpression boxPrimitive(JCExpression tree, Type box) { |
aoqi@0 | 3148 | make_at(tree.pos()); |
aoqi@0 | 3149 | if (target.boxWithConstructors()) { |
aoqi@0 | 3150 | Symbol ctor = lookupConstructor(tree.pos(), |
aoqi@0 | 3151 | box, |
aoqi@0 | 3152 | List.<Type>nil() |
aoqi@0 | 3153 | .prepend(tree.type)); |
aoqi@0 | 3154 | return make.Create(ctor, List.of(tree)); |
aoqi@0 | 3155 | } else { |
aoqi@0 | 3156 | Symbol valueOfSym = lookupMethod(tree.pos(), |
aoqi@0 | 3157 | names.valueOf, |
aoqi@0 | 3158 | box, |
aoqi@0 | 3159 | List.<Type>nil() |
aoqi@0 | 3160 | .prepend(tree.type)); |
aoqi@0 | 3161 | return make.App(make.QualIdent(valueOfSym), List.of(tree)); |
aoqi@0 | 3162 | } |
aoqi@0 | 3163 | } |
aoqi@0 | 3164 | |
aoqi@0 | 3165 | /** Unbox an object to a primitive value. */ |
aoqi@0 | 3166 | JCExpression unbox(JCExpression tree, Type primitive) { |
aoqi@0 | 3167 | Type unboxedType = types.unboxedType(tree.type); |
aoqi@0 | 3168 | if (unboxedType.hasTag(NONE)) { |
aoqi@0 | 3169 | unboxedType = primitive; |
aoqi@0 | 3170 | if (!unboxedType.isPrimitive()) |
aoqi@0 | 3171 | throw new AssertionError(unboxedType); |
aoqi@0 | 3172 | make_at(tree.pos()); |
aoqi@0 | 3173 | tree = make.TypeCast(types.boxedClass(unboxedType).type, tree); |
aoqi@0 | 3174 | } else { |
aoqi@0 | 3175 | // There must be a conversion from unboxedType to primitive. |
aoqi@0 | 3176 | if (!types.isSubtype(unboxedType, primitive)) |
aoqi@0 | 3177 | throw new AssertionError(tree); |
aoqi@0 | 3178 | } |
aoqi@0 | 3179 | make_at(tree.pos()); |
aoqi@0 | 3180 | Symbol valueSym = lookupMethod(tree.pos(), |
aoqi@0 | 3181 | unboxedType.tsym.name.append(names.Value), // x.intValue() |
aoqi@0 | 3182 | tree.type, |
aoqi@0 | 3183 | List.<Type>nil()); |
aoqi@0 | 3184 | return make.App(make.Select(tree, valueSym)); |
aoqi@0 | 3185 | } |
aoqi@0 | 3186 | |
aoqi@0 | 3187 | /** Visitor method for parenthesized expressions. |
aoqi@0 | 3188 | * If the subexpression has changed, omit the parens. |
aoqi@0 | 3189 | */ |
aoqi@0 | 3190 | public void visitParens(JCParens tree) { |
aoqi@0 | 3191 | JCTree expr = translate(tree.expr); |
aoqi@0 | 3192 | result = ((expr == tree.expr) ? tree : expr); |
aoqi@0 | 3193 | } |
aoqi@0 | 3194 | |
aoqi@0 | 3195 | public void visitIndexed(JCArrayAccess tree) { |
aoqi@0 | 3196 | tree.indexed = translate(tree.indexed); |
aoqi@0 | 3197 | tree.index = translate(tree.index, syms.intType); |
aoqi@0 | 3198 | result = tree; |
aoqi@0 | 3199 | } |
aoqi@0 | 3200 | |
aoqi@0 | 3201 | public void visitAssign(JCAssign tree) { |
aoqi@0 | 3202 | tree.lhs = translate(tree.lhs, tree); |
aoqi@0 | 3203 | tree.rhs = translate(tree.rhs, tree.lhs.type); |
aoqi@0 | 3204 | |
aoqi@0 | 3205 | // If translated left hand side is an Apply, we are |
aoqi@0 | 3206 | // seeing an access method invocation. In this case, append |
aoqi@0 | 3207 | // right hand side as last argument of the access method. |
aoqi@0 | 3208 | if (tree.lhs.hasTag(APPLY)) { |
aoqi@0 | 3209 | JCMethodInvocation app = (JCMethodInvocation)tree.lhs; |
aoqi@0 | 3210 | app.args = List.of(tree.rhs).prependList(app.args); |
aoqi@0 | 3211 | result = app; |
aoqi@0 | 3212 | } else { |
aoqi@0 | 3213 | result = tree; |
aoqi@0 | 3214 | } |
aoqi@0 | 3215 | } |
aoqi@0 | 3216 | |
aoqi@0 | 3217 | public void visitAssignop(final JCAssignOp tree) { |
aoqi@0 | 3218 | JCTree lhsAccess = access(TreeInfo.skipParens(tree.lhs)); |
aoqi@0 | 3219 | final boolean boxingReq = !tree.lhs.type.isPrimitive() && |
aoqi@0 | 3220 | tree.operator.type.getReturnType().isPrimitive(); |
aoqi@0 | 3221 | |
aoqi@0 | 3222 | if (boxingReq || lhsAccess.hasTag(APPLY)) { |
aoqi@0 | 3223 | // boxing required; need to rewrite as x = (unbox typeof x)(x op y); |
aoqi@0 | 3224 | // or if x == (typeof x)z then z = (unbox typeof x)((typeof x)z op y) |
aoqi@0 | 3225 | // (but without recomputing x) |
aoqi@0 | 3226 | JCTree newTree = abstractLval(tree.lhs, new TreeBuilder() { |
aoqi@0 | 3227 | public JCTree build(final JCTree lhs) { |
aoqi@0 | 3228 | JCTree.Tag newTag = tree.getTag().noAssignOp(); |
aoqi@0 | 3229 | // Erasure (TransTypes) can change the type of |
aoqi@0 | 3230 | // tree.lhs. However, we can still get the |
aoqi@0 | 3231 | // unerased type of tree.lhs as it is stored |
aoqi@0 | 3232 | // in tree.type in Attr. |
aoqi@0 | 3233 | Symbol newOperator = rs.resolveBinaryOperator(tree.pos(), |
aoqi@0 | 3234 | newTag, |
aoqi@0 | 3235 | attrEnv, |
aoqi@0 | 3236 | tree.type, |
aoqi@0 | 3237 | tree.rhs.type); |
aoqi@0 | 3238 | JCExpression expr = (JCExpression)lhs; |
aoqi@0 | 3239 | if (expr.type != tree.type) |
aoqi@0 | 3240 | expr = make.TypeCast(tree.type, expr); |
aoqi@0 | 3241 | JCBinary opResult = make.Binary(newTag, expr, tree.rhs); |
aoqi@0 | 3242 | opResult.operator = newOperator; |
aoqi@0 | 3243 | opResult.type = newOperator.type.getReturnType(); |
aoqi@0 | 3244 | JCExpression newRhs = boxingReq ? |
aoqi@0 | 3245 | make.TypeCast(types.unboxedType(tree.type), opResult) : |
aoqi@0 | 3246 | opResult; |
aoqi@0 | 3247 | return make.Assign((JCExpression)lhs, newRhs).setType(tree.type); |
aoqi@0 | 3248 | } |
aoqi@0 | 3249 | }); |
aoqi@0 | 3250 | result = translate(newTree); |
aoqi@0 | 3251 | return; |
aoqi@0 | 3252 | } |
aoqi@0 | 3253 | tree.lhs = translate(tree.lhs, tree); |
aoqi@0 | 3254 | tree.rhs = translate(tree.rhs, tree.operator.type.getParameterTypes().tail.head); |
aoqi@0 | 3255 | |
aoqi@0 | 3256 | // If translated left hand side is an Apply, we are |
aoqi@0 | 3257 | // seeing an access method invocation. In this case, append |
aoqi@0 | 3258 | // right hand side as last argument of the access method. |
aoqi@0 | 3259 | if (tree.lhs.hasTag(APPLY)) { |
aoqi@0 | 3260 | JCMethodInvocation app = (JCMethodInvocation)tree.lhs; |
aoqi@0 | 3261 | // if operation is a += on strings, |
aoqi@0 | 3262 | // make sure to convert argument to string |
aoqi@0 | 3263 | JCExpression rhs = (((OperatorSymbol)tree.operator).opcode == string_add) |
aoqi@0 | 3264 | ? makeString(tree.rhs) |
aoqi@0 | 3265 | : tree.rhs; |
aoqi@0 | 3266 | app.args = List.of(rhs).prependList(app.args); |
aoqi@0 | 3267 | result = app; |
aoqi@0 | 3268 | } else { |
aoqi@0 | 3269 | result = tree; |
aoqi@0 | 3270 | } |
aoqi@0 | 3271 | } |
aoqi@0 | 3272 | |
aoqi@0 | 3273 | /** Lower a tree of the form e++ or e-- where e is an object type */ |
aoqi@0 | 3274 | JCTree lowerBoxedPostop(final JCUnary tree) { |
aoqi@0 | 3275 | // translate to tmp1=lval(e); tmp2=tmp1; tmp1 OP 1; tmp2 |
aoqi@0 | 3276 | // or |
aoqi@0 | 3277 | // translate to tmp1=lval(e); tmp2=tmp1; (typeof tree)tmp1 OP 1; tmp2 |
aoqi@0 | 3278 | // where OP is += or -= |
aoqi@0 | 3279 | final boolean cast = TreeInfo.skipParens(tree.arg).hasTag(TYPECAST); |
aoqi@0 | 3280 | return abstractLval(tree.arg, new TreeBuilder() { |
aoqi@0 | 3281 | public JCTree build(final JCTree tmp1) { |
aoqi@0 | 3282 | return abstractRval(tmp1, tree.arg.type, new TreeBuilder() { |
aoqi@0 | 3283 | public JCTree build(final JCTree tmp2) { |
aoqi@0 | 3284 | JCTree.Tag opcode = (tree.hasTag(POSTINC)) |
aoqi@0 | 3285 | ? PLUS_ASG : MINUS_ASG; |
aoqi@0 | 3286 | JCTree lhs = cast |
aoqi@0 | 3287 | ? make.TypeCast(tree.arg.type, (JCExpression)tmp1) |
aoqi@0 | 3288 | : tmp1; |
aoqi@0 | 3289 | JCTree update = makeAssignop(opcode, |
aoqi@0 | 3290 | lhs, |
aoqi@0 | 3291 | make.Literal(1)); |
aoqi@0 | 3292 | return makeComma(update, tmp2); |
aoqi@0 | 3293 | } |
aoqi@0 | 3294 | }); |
aoqi@0 | 3295 | } |
aoqi@0 | 3296 | }); |
aoqi@0 | 3297 | } |
aoqi@0 | 3298 | |
aoqi@0 | 3299 | public void visitUnary(JCUnary tree) { |
aoqi@0 | 3300 | boolean isUpdateOperator = tree.getTag().isIncOrDecUnaryOp(); |
aoqi@0 | 3301 | if (isUpdateOperator && !tree.arg.type.isPrimitive()) { |
aoqi@0 | 3302 | switch(tree.getTag()) { |
aoqi@0 | 3303 | case PREINC: // ++ e |
aoqi@0 | 3304 | // translate to e += 1 |
aoqi@0 | 3305 | case PREDEC: // -- e |
aoqi@0 | 3306 | // translate to e -= 1 |
aoqi@0 | 3307 | { |
aoqi@0 | 3308 | JCTree.Tag opcode = (tree.hasTag(PREINC)) |
aoqi@0 | 3309 | ? PLUS_ASG : MINUS_ASG; |
aoqi@0 | 3310 | JCAssignOp newTree = makeAssignop(opcode, |
aoqi@0 | 3311 | tree.arg, |
aoqi@0 | 3312 | make.Literal(1)); |
aoqi@0 | 3313 | result = translate(newTree, tree.type); |
aoqi@0 | 3314 | return; |
aoqi@0 | 3315 | } |
aoqi@0 | 3316 | case POSTINC: // e ++ |
aoqi@0 | 3317 | case POSTDEC: // e -- |
aoqi@0 | 3318 | { |
aoqi@0 | 3319 | result = translate(lowerBoxedPostop(tree), tree.type); |
aoqi@0 | 3320 | return; |
aoqi@0 | 3321 | } |
aoqi@0 | 3322 | } |
aoqi@0 | 3323 | throw new AssertionError(tree); |
aoqi@0 | 3324 | } |
aoqi@0 | 3325 | |
aoqi@0 | 3326 | tree.arg = boxIfNeeded(translate(tree.arg, tree), tree.type); |
aoqi@0 | 3327 | |
aoqi@0 | 3328 | if (tree.hasTag(NOT) && tree.arg.type.constValue() != null) { |
aoqi@0 | 3329 | tree.type = cfolder.fold1(bool_not, tree.arg.type); |
aoqi@0 | 3330 | } |
aoqi@0 | 3331 | |
aoqi@0 | 3332 | // If translated left hand side is an Apply, we are |
aoqi@0 | 3333 | // seeing an access method invocation. In this case, return |
aoqi@0 | 3334 | // that access method invocation as result. |
aoqi@0 | 3335 | if (isUpdateOperator && tree.arg.hasTag(APPLY)) { |
aoqi@0 | 3336 | result = tree.arg; |
aoqi@0 | 3337 | } else { |
aoqi@0 | 3338 | result = tree; |
aoqi@0 | 3339 | } |
aoqi@0 | 3340 | } |
aoqi@0 | 3341 | |
aoqi@0 | 3342 | public void visitBinary(JCBinary tree) { |
aoqi@0 | 3343 | List<Type> formals = tree.operator.type.getParameterTypes(); |
aoqi@0 | 3344 | JCTree lhs = tree.lhs = translate(tree.lhs, formals.head); |
aoqi@0 | 3345 | switch (tree.getTag()) { |
aoqi@0 | 3346 | case OR: |
aoqi@0 | 3347 | if (lhs.type.isTrue()) { |
aoqi@0 | 3348 | result = lhs; |
aoqi@0 | 3349 | return; |
aoqi@0 | 3350 | } |
aoqi@0 | 3351 | if (lhs.type.isFalse()) { |
aoqi@0 | 3352 | result = translate(tree.rhs, formals.tail.head); |
aoqi@0 | 3353 | return; |
aoqi@0 | 3354 | } |
aoqi@0 | 3355 | break; |
aoqi@0 | 3356 | case AND: |
aoqi@0 | 3357 | if (lhs.type.isFalse()) { |
aoqi@0 | 3358 | result = lhs; |
aoqi@0 | 3359 | return; |
aoqi@0 | 3360 | } |
aoqi@0 | 3361 | if (lhs.type.isTrue()) { |
aoqi@0 | 3362 | result = translate(tree.rhs, formals.tail.head); |
aoqi@0 | 3363 | return; |
aoqi@0 | 3364 | } |
aoqi@0 | 3365 | break; |
aoqi@0 | 3366 | } |
aoqi@0 | 3367 | tree.rhs = translate(tree.rhs, formals.tail.head); |
aoqi@0 | 3368 | result = tree; |
aoqi@0 | 3369 | } |
aoqi@0 | 3370 | |
aoqi@0 | 3371 | public void visitIdent(JCIdent tree) { |
aoqi@0 | 3372 | result = access(tree.sym, tree, enclOp, false); |
aoqi@0 | 3373 | } |
aoqi@0 | 3374 | |
aoqi@0 | 3375 | /** Translate away the foreach loop. */ |
aoqi@0 | 3376 | public void visitForeachLoop(JCEnhancedForLoop tree) { |
aoqi@0 | 3377 | if (types.elemtype(tree.expr.type) == null) |
aoqi@0 | 3378 | visitIterableForeachLoop(tree); |
aoqi@0 | 3379 | else |
aoqi@0 | 3380 | visitArrayForeachLoop(tree); |
aoqi@0 | 3381 | } |
aoqi@0 | 3382 | // where |
aoqi@0 | 3383 | /** |
aoqi@0 | 3384 | * A statement of the form |
aoqi@0 | 3385 | * |
aoqi@0 | 3386 | * <pre> |
aoqi@0 | 3387 | * for ( T v : arrayexpr ) stmt; |
aoqi@0 | 3388 | * </pre> |
aoqi@0 | 3389 | * |
aoqi@0 | 3390 | * (where arrayexpr is of an array type) gets translated to |
aoqi@0 | 3391 | * |
aoqi@0 | 3392 | * <pre>{@code |
aoqi@0 | 3393 | * for ( { arraytype #arr = arrayexpr; |
aoqi@0 | 3394 | * int #len = array.length; |
aoqi@0 | 3395 | * int #i = 0; }; |
aoqi@0 | 3396 | * #i < #len; i$++ ) { |
aoqi@0 | 3397 | * T v = arr$[#i]; |
aoqi@0 | 3398 | * stmt; |
aoqi@0 | 3399 | * } |
aoqi@0 | 3400 | * }</pre> |
aoqi@0 | 3401 | * |
aoqi@0 | 3402 | * where #arr, #len, and #i are freshly named synthetic local variables. |
aoqi@0 | 3403 | */ |
aoqi@0 | 3404 | private void visitArrayForeachLoop(JCEnhancedForLoop tree) { |
aoqi@0 | 3405 | make_at(tree.expr.pos()); |
aoqi@0 | 3406 | VarSymbol arraycache = new VarSymbol(SYNTHETIC, |
aoqi@0 | 3407 | names.fromString("arr" + target.syntheticNameChar()), |
aoqi@0 | 3408 | tree.expr.type, |
aoqi@0 | 3409 | currentMethodSym); |
aoqi@0 | 3410 | JCStatement arraycachedef = make.VarDef(arraycache, tree.expr); |
aoqi@0 | 3411 | VarSymbol lencache = new VarSymbol(SYNTHETIC, |
aoqi@0 | 3412 | names.fromString("len" + target.syntheticNameChar()), |
aoqi@0 | 3413 | syms.intType, |
aoqi@0 | 3414 | currentMethodSym); |
aoqi@0 | 3415 | JCStatement lencachedef = make. |
aoqi@0 | 3416 | VarDef(lencache, make.Select(make.Ident(arraycache), syms.lengthVar)); |
aoqi@0 | 3417 | VarSymbol index = new VarSymbol(SYNTHETIC, |
aoqi@0 | 3418 | names.fromString("i" + target.syntheticNameChar()), |
aoqi@0 | 3419 | syms.intType, |
aoqi@0 | 3420 | currentMethodSym); |
aoqi@0 | 3421 | |
aoqi@0 | 3422 | JCVariableDecl indexdef = make.VarDef(index, make.Literal(INT, 0)); |
aoqi@0 | 3423 | indexdef.init.type = indexdef.type = syms.intType.constType(0); |
aoqi@0 | 3424 | |
aoqi@0 | 3425 | List<JCStatement> loopinit = List.of(arraycachedef, lencachedef, indexdef); |
aoqi@0 | 3426 | JCBinary cond = makeBinary(LT, make.Ident(index), make.Ident(lencache)); |
aoqi@0 | 3427 | |
aoqi@0 | 3428 | JCExpressionStatement step = make.Exec(makeUnary(PREINC, make.Ident(index))); |
aoqi@0 | 3429 | |
aoqi@0 | 3430 | Type elemtype = types.elemtype(tree.expr.type); |
aoqi@0 | 3431 | JCExpression loopvarinit = make.Indexed(make.Ident(arraycache), |
aoqi@0 | 3432 | make.Ident(index)).setType(elemtype); |
aoqi@0 | 3433 | JCVariableDecl loopvardef = (JCVariableDecl)make.VarDef(tree.var.mods, |
aoqi@0 | 3434 | tree.var.name, |
aoqi@0 | 3435 | tree.var.vartype, |
aoqi@0 | 3436 | loopvarinit).setType(tree.var.type); |
aoqi@0 | 3437 | loopvardef.sym = tree.var.sym; |
aoqi@0 | 3438 | JCBlock body = make. |
aoqi@0 | 3439 | Block(0, List.of(loopvardef, tree.body)); |
aoqi@0 | 3440 | |
aoqi@0 | 3441 | result = translate(make. |
aoqi@0 | 3442 | ForLoop(loopinit, |
aoqi@0 | 3443 | cond, |
aoqi@0 | 3444 | List.of(step), |
aoqi@0 | 3445 | body)); |
aoqi@0 | 3446 | patchTargets(body, tree, result); |
aoqi@0 | 3447 | } |
aoqi@0 | 3448 | /** Patch up break and continue targets. */ |
aoqi@0 | 3449 | private void patchTargets(JCTree body, final JCTree src, final JCTree dest) { |
aoqi@0 | 3450 | class Patcher extends TreeScanner { |
aoqi@0 | 3451 | public void visitBreak(JCBreak tree) { |
aoqi@0 | 3452 | if (tree.target == src) |
aoqi@0 | 3453 | tree.target = dest; |
aoqi@0 | 3454 | } |
aoqi@0 | 3455 | public void visitContinue(JCContinue tree) { |
aoqi@0 | 3456 | if (tree.target == src) |
aoqi@0 | 3457 | tree.target = dest; |
aoqi@0 | 3458 | } |
aoqi@0 | 3459 | public void visitClassDef(JCClassDecl tree) {} |
aoqi@0 | 3460 | } |
aoqi@0 | 3461 | new Patcher().scan(body); |
aoqi@0 | 3462 | } |
aoqi@0 | 3463 | /** |
aoqi@0 | 3464 | * A statement of the form |
aoqi@0 | 3465 | * |
aoqi@0 | 3466 | * <pre> |
aoqi@0 | 3467 | * for ( T v : coll ) stmt ; |
aoqi@0 | 3468 | * </pre> |
aoqi@0 | 3469 | * |
aoqi@0 | 3470 | * (where coll implements {@code Iterable<? extends T>}) gets translated to |
aoqi@0 | 3471 | * |
aoqi@0 | 3472 | * <pre>{@code |
aoqi@0 | 3473 | * for ( Iterator<? extends T> #i = coll.iterator(); #i.hasNext(); ) { |
aoqi@0 | 3474 | * T v = (T) #i.next(); |
aoqi@0 | 3475 | * stmt; |
aoqi@0 | 3476 | * } |
aoqi@0 | 3477 | * }</pre> |
aoqi@0 | 3478 | * |
aoqi@0 | 3479 | * where #i is a freshly named synthetic local variable. |
aoqi@0 | 3480 | */ |
aoqi@0 | 3481 | private void visitIterableForeachLoop(JCEnhancedForLoop tree) { |
aoqi@0 | 3482 | make_at(tree.expr.pos()); |
aoqi@0 | 3483 | Type iteratorTarget = syms.objectType; |
aoqi@0 | 3484 | Type iterableType = types.asSuper(types.cvarUpperBound(tree.expr.type), |
aoqi@0 | 3485 | syms.iterableType.tsym); |
aoqi@0 | 3486 | if (iterableType.getTypeArguments().nonEmpty()) |
aoqi@0 | 3487 | iteratorTarget = types.erasure(iterableType.getTypeArguments().head); |
aoqi@0 | 3488 | Type eType = tree.expr.type; |
aoqi@0 | 3489 | while (eType.hasTag(TYPEVAR)) { |
aoqi@0 | 3490 | eType = eType.getUpperBound(); |
aoqi@0 | 3491 | } |
aoqi@0 | 3492 | tree.expr.type = types.erasure(eType); |
aoqi@0 | 3493 | if (eType.isCompound()) |
aoqi@0 | 3494 | tree.expr = make.TypeCast(types.erasure(iterableType), tree.expr); |
aoqi@0 | 3495 | Symbol iterator = lookupMethod(tree.expr.pos(), |
aoqi@0 | 3496 | names.iterator, |
aoqi@0 | 3497 | eType, |
aoqi@0 | 3498 | List.<Type>nil()); |
aoqi@0 | 3499 | VarSymbol itvar = new VarSymbol(SYNTHETIC, names.fromString("i" + target.syntheticNameChar()), |
aoqi@0 | 3500 | types.erasure(types.asSuper(iterator.type.getReturnType(), syms.iteratorType.tsym)), |
aoqi@0 | 3501 | currentMethodSym); |
aoqi@0 | 3502 | |
aoqi@0 | 3503 | JCStatement init = make. |
aoqi@0 | 3504 | VarDef(itvar, make.App(make.Select(tree.expr, iterator) |
aoqi@0 | 3505 | .setType(types.erasure(iterator.type)))); |
aoqi@0 | 3506 | |
aoqi@0 | 3507 | Symbol hasNext = lookupMethod(tree.expr.pos(), |
aoqi@0 | 3508 | names.hasNext, |
aoqi@0 | 3509 | itvar.type, |
aoqi@0 | 3510 | List.<Type>nil()); |
aoqi@0 | 3511 | JCMethodInvocation cond = make.App(make.Select(make.Ident(itvar), hasNext)); |
aoqi@0 | 3512 | Symbol next = lookupMethod(tree.expr.pos(), |
aoqi@0 | 3513 | names.next, |
aoqi@0 | 3514 | itvar.type, |
aoqi@0 | 3515 | List.<Type>nil()); |
aoqi@0 | 3516 | JCExpression vardefinit = make.App(make.Select(make.Ident(itvar), next)); |
aoqi@0 | 3517 | if (tree.var.type.isPrimitive()) |
aoqi@0 | 3518 | vardefinit = make.TypeCast(types.cvarUpperBound(iteratorTarget), vardefinit); |
aoqi@0 | 3519 | else |
aoqi@0 | 3520 | vardefinit = make.TypeCast(tree.var.type, vardefinit); |
aoqi@0 | 3521 | JCVariableDecl indexDef = (JCVariableDecl)make.VarDef(tree.var.mods, |
aoqi@0 | 3522 | tree.var.name, |
aoqi@0 | 3523 | tree.var.vartype, |
aoqi@0 | 3524 | vardefinit).setType(tree.var.type); |
aoqi@0 | 3525 | indexDef.sym = tree.var.sym; |
aoqi@0 | 3526 | JCBlock body = make.Block(0, List.of(indexDef, tree.body)); |
aoqi@0 | 3527 | body.endpos = TreeInfo.endPos(tree.body); |
aoqi@0 | 3528 | result = translate(make. |
aoqi@0 | 3529 | ForLoop(List.of(init), |
aoqi@0 | 3530 | cond, |
aoqi@0 | 3531 | List.<JCExpressionStatement>nil(), |
aoqi@0 | 3532 | body)); |
aoqi@0 | 3533 | patchTargets(body, tree, result); |
aoqi@0 | 3534 | } |
aoqi@0 | 3535 | |
aoqi@0 | 3536 | public void visitVarDef(JCVariableDecl tree) { |
aoqi@0 | 3537 | MethodSymbol oldMethodSym = currentMethodSym; |
aoqi@0 | 3538 | tree.mods = translate(tree.mods); |
aoqi@0 | 3539 | tree.vartype = translate(tree.vartype); |
aoqi@0 | 3540 | if (currentMethodSym == null) { |
aoqi@0 | 3541 | // A class or instance field initializer. |
aoqi@0 | 3542 | currentMethodSym = |
aoqi@0 | 3543 | new MethodSymbol((tree.mods.flags&STATIC) | BLOCK, |
aoqi@0 | 3544 | names.empty, null, |
aoqi@0 | 3545 | currentClass); |
aoqi@0 | 3546 | } |
aoqi@0 | 3547 | if (tree.init != null) tree.init = translate(tree.init, tree.type); |
aoqi@0 | 3548 | result = tree; |
aoqi@0 | 3549 | currentMethodSym = oldMethodSym; |
aoqi@0 | 3550 | } |
aoqi@0 | 3551 | |
aoqi@0 | 3552 | public void visitBlock(JCBlock tree) { |
aoqi@0 | 3553 | MethodSymbol oldMethodSym = currentMethodSym; |
aoqi@0 | 3554 | if (currentMethodSym == null) { |
aoqi@0 | 3555 | // Block is a static or instance initializer. |
aoqi@0 | 3556 | currentMethodSym = |
aoqi@0 | 3557 | new MethodSymbol(tree.flags | BLOCK, |
aoqi@0 | 3558 | names.empty, null, |
aoqi@0 | 3559 | currentClass); |
aoqi@0 | 3560 | } |
aoqi@0 | 3561 | super.visitBlock(tree); |
aoqi@0 | 3562 | currentMethodSym = oldMethodSym; |
aoqi@0 | 3563 | } |
aoqi@0 | 3564 | |
aoqi@0 | 3565 | public void visitDoLoop(JCDoWhileLoop tree) { |
aoqi@0 | 3566 | tree.body = translate(tree.body); |
aoqi@0 | 3567 | tree.cond = translate(tree.cond, syms.booleanType); |
aoqi@0 | 3568 | result = tree; |
aoqi@0 | 3569 | } |
aoqi@0 | 3570 | |
aoqi@0 | 3571 | public void visitWhileLoop(JCWhileLoop tree) { |
aoqi@0 | 3572 | tree.cond = translate(tree.cond, syms.booleanType); |
aoqi@0 | 3573 | tree.body = translate(tree.body); |
aoqi@0 | 3574 | result = tree; |
aoqi@0 | 3575 | } |
aoqi@0 | 3576 | |
aoqi@0 | 3577 | public void visitForLoop(JCForLoop tree) { |
aoqi@0 | 3578 | tree.init = translate(tree.init); |
aoqi@0 | 3579 | if (tree.cond != null) |
aoqi@0 | 3580 | tree.cond = translate(tree.cond, syms.booleanType); |
aoqi@0 | 3581 | tree.step = translate(tree.step); |
aoqi@0 | 3582 | tree.body = translate(tree.body); |
aoqi@0 | 3583 | result = tree; |
aoqi@0 | 3584 | } |
aoqi@0 | 3585 | |
aoqi@0 | 3586 | public void visitReturn(JCReturn tree) { |
aoqi@0 | 3587 | if (tree.expr != null) |
aoqi@0 | 3588 | tree.expr = translate(tree.expr, |
aoqi@0 | 3589 | types.erasure(currentMethodDef |
aoqi@0 | 3590 | .restype.type)); |
aoqi@0 | 3591 | result = tree; |
aoqi@0 | 3592 | } |
aoqi@0 | 3593 | |
aoqi@0 | 3594 | public void visitSwitch(JCSwitch tree) { |
aoqi@0 | 3595 | Type selsuper = types.supertype(tree.selector.type); |
aoqi@0 | 3596 | boolean enumSwitch = selsuper != null && |
aoqi@0 | 3597 | (tree.selector.type.tsym.flags() & ENUM) != 0; |
aoqi@0 | 3598 | boolean stringSwitch = selsuper != null && |
aoqi@0 | 3599 | types.isSameType(tree.selector.type, syms.stringType); |
aoqi@0 | 3600 | Type target = enumSwitch ? tree.selector.type : |
aoqi@0 | 3601 | (stringSwitch? syms.stringType : syms.intType); |
aoqi@0 | 3602 | tree.selector = translate(tree.selector, target); |
aoqi@0 | 3603 | tree.cases = translateCases(tree.cases); |
aoqi@0 | 3604 | if (enumSwitch) { |
aoqi@0 | 3605 | result = visitEnumSwitch(tree); |
aoqi@0 | 3606 | } else if (stringSwitch) { |
aoqi@0 | 3607 | result = visitStringSwitch(tree); |
aoqi@0 | 3608 | } else { |
aoqi@0 | 3609 | result = tree; |
aoqi@0 | 3610 | } |
aoqi@0 | 3611 | } |
aoqi@0 | 3612 | |
aoqi@0 | 3613 | public JCTree visitEnumSwitch(JCSwitch tree) { |
aoqi@0 | 3614 | TypeSymbol enumSym = tree.selector.type.tsym; |
aoqi@0 | 3615 | EnumMapping map = mapForEnum(tree.pos(), enumSym); |
aoqi@0 | 3616 | make_at(tree.pos()); |
aoqi@0 | 3617 | Symbol ordinalMethod = lookupMethod(tree.pos(), |
aoqi@0 | 3618 | names.ordinal, |
aoqi@0 | 3619 | tree.selector.type, |
aoqi@0 | 3620 | List.<Type>nil()); |
aoqi@0 | 3621 | JCArrayAccess selector = make.Indexed(map.mapVar, |
aoqi@0 | 3622 | make.App(make.Select(tree.selector, |
aoqi@0 | 3623 | ordinalMethod))); |
aoqi@0 | 3624 | ListBuffer<JCCase> cases = new ListBuffer<JCCase>(); |
aoqi@0 | 3625 | for (JCCase c : tree.cases) { |
aoqi@0 | 3626 | if (c.pat != null) { |
aoqi@0 | 3627 | VarSymbol label = (VarSymbol)TreeInfo.symbol(c.pat); |
aoqi@0 | 3628 | JCLiteral pat = map.forConstant(label); |
aoqi@0 | 3629 | cases.append(make.Case(pat, c.stats)); |
aoqi@0 | 3630 | } else { |
aoqi@0 | 3631 | cases.append(c); |
aoqi@0 | 3632 | } |
aoqi@0 | 3633 | } |
aoqi@0 | 3634 | JCSwitch enumSwitch = make.Switch(selector, cases.toList()); |
aoqi@0 | 3635 | patchTargets(enumSwitch, tree, enumSwitch); |
aoqi@0 | 3636 | return enumSwitch; |
aoqi@0 | 3637 | } |
aoqi@0 | 3638 | |
aoqi@0 | 3639 | public JCTree visitStringSwitch(JCSwitch tree) { |
aoqi@0 | 3640 | List<JCCase> caseList = tree.getCases(); |
aoqi@0 | 3641 | int alternatives = caseList.size(); |
aoqi@0 | 3642 | |
aoqi@0 | 3643 | if (alternatives == 0) { // Strange but legal possibility |
aoqi@0 | 3644 | return make.at(tree.pos()).Exec(attr.makeNullCheck(tree.getExpression())); |
aoqi@0 | 3645 | } else { |
aoqi@0 | 3646 | /* |
aoqi@0 | 3647 | * The general approach used is to translate a single |
aoqi@0 | 3648 | * string switch statement into a series of two chained |
aoqi@0 | 3649 | * switch statements: the first a synthesized statement |
aoqi@0 | 3650 | * switching on the argument string's hash value and |
aoqi@0 | 3651 | * computing a string's position in the list of original |
aoqi@0 | 3652 | * case labels, if any, followed by a second switch on the |
aoqi@0 | 3653 | * computed integer value. The second switch has the same |
aoqi@0 | 3654 | * code structure as the original string switch statement |
aoqi@0 | 3655 | * except that the string case labels are replaced with |
aoqi@0 | 3656 | * positional integer constants starting at 0. |
aoqi@0 | 3657 | * |
aoqi@0 | 3658 | * The first switch statement can be thought of as an |
aoqi@0 | 3659 | * inlined map from strings to their position in the case |
aoqi@0 | 3660 | * label list. An alternate implementation would use an |
aoqi@0 | 3661 | * actual Map for this purpose, as done for enum switches. |
aoqi@0 | 3662 | * |
aoqi@0 | 3663 | * With some additional effort, it would be possible to |
aoqi@0 | 3664 | * use a single switch statement on the hash code of the |
aoqi@0 | 3665 | * argument, but care would need to be taken to preserve |
aoqi@0 | 3666 | * the proper control flow in the presence of hash |
aoqi@0 | 3667 | * collisions and other complications, such as |
aoqi@0 | 3668 | * fallthroughs. Switch statements with one or two |
aoqi@0 | 3669 | * alternatives could also be specially translated into |
aoqi@0 | 3670 | * if-then statements to omit the computation of the hash |
aoqi@0 | 3671 | * code. |
aoqi@0 | 3672 | * |
aoqi@0 | 3673 | * The generated code assumes that the hashing algorithm |
aoqi@0 | 3674 | * of String is the same in the compilation environment as |
aoqi@0 | 3675 | * in the environment the code will run in. The string |
aoqi@0 | 3676 | * hashing algorithm in the SE JDK has been unchanged |
aoqi@0 | 3677 | * since at least JDK 1.2. Since the algorithm has been |
aoqi@0 | 3678 | * specified since that release as well, it is very |
aoqi@0 | 3679 | * unlikely to be changed in the future. |
aoqi@0 | 3680 | * |
aoqi@0 | 3681 | * Different hashing algorithms, such as the length of the |
aoqi@0 | 3682 | * strings or a perfect hashing algorithm over the |
aoqi@0 | 3683 | * particular set of case labels, could potentially be |
aoqi@0 | 3684 | * used instead of String.hashCode. |
aoqi@0 | 3685 | */ |
aoqi@0 | 3686 | |
aoqi@0 | 3687 | ListBuffer<JCStatement> stmtList = new ListBuffer<JCStatement>(); |
aoqi@0 | 3688 | |
aoqi@0 | 3689 | // Map from String case labels to their original position in |
aoqi@0 | 3690 | // the list of case labels. |
aoqi@0 | 3691 | Map<String, Integer> caseLabelToPosition = |
aoqi@0 | 3692 | new LinkedHashMap<String, Integer>(alternatives + 1, 1.0f); |
aoqi@0 | 3693 | |
aoqi@0 | 3694 | // Map of hash codes to the string case labels having that hashCode. |
aoqi@0 | 3695 | Map<Integer, Set<String>> hashToString = |
aoqi@0 | 3696 | new LinkedHashMap<Integer, Set<String>>(alternatives + 1, 1.0f); |
aoqi@0 | 3697 | |
aoqi@0 | 3698 | int casePosition = 0; |
aoqi@0 | 3699 | for(JCCase oneCase : caseList) { |
aoqi@0 | 3700 | JCExpression expression = oneCase.getExpression(); |
aoqi@0 | 3701 | |
aoqi@0 | 3702 | if (expression != null) { // expression for a "default" case is null |
aoqi@0 | 3703 | String labelExpr = (String) expression.type.constValue(); |
aoqi@0 | 3704 | Integer mapping = caseLabelToPosition.put(labelExpr, casePosition); |
aoqi@0 | 3705 | Assert.checkNull(mapping); |
aoqi@0 | 3706 | int hashCode = labelExpr.hashCode(); |
aoqi@0 | 3707 | |
aoqi@0 | 3708 | Set<String> stringSet = hashToString.get(hashCode); |
aoqi@0 | 3709 | if (stringSet == null) { |
aoqi@0 | 3710 | stringSet = new LinkedHashSet<String>(1, 1.0f); |
aoqi@0 | 3711 | stringSet.add(labelExpr); |
aoqi@0 | 3712 | hashToString.put(hashCode, stringSet); |
aoqi@0 | 3713 | } else { |
aoqi@0 | 3714 | boolean added = stringSet.add(labelExpr); |
aoqi@0 | 3715 | Assert.check(added); |
aoqi@0 | 3716 | } |
aoqi@0 | 3717 | } |
aoqi@0 | 3718 | casePosition++; |
aoqi@0 | 3719 | } |
aoqi@0 | 3720 | |
aoqi@0 | 3721 | // Synthesize a switch statement that has the effect of |
aoqi@0 | 3722 | // mapping from a string to the integer position of that |
aoqi@0 | 3723 | // string in the list of case labels. This is done by |
aoqi@0 | 3724 | // switching on the hashCode of the string followed by an |
aoqi@0 | 3725 | // if-then-else chain comparing the input for equality |
aoqi@0 | 3726 | // with all the case labels having that hash value. |
aoqi@0 | 3727 | |
aoqi@0 | 3728 | /* |
aoqi@0 | 3729 | * s$ = top of stack; |
aoqi@0 | 3730 | * tmp$ = -1; |
aoqi@0 | 3731 | * switch($s.hashCode()) { |
aoqi@0 | 3732 | * case caseLabel.hashCode: |
aoqi@0 | 3733 | * if (s$.equals("caseLabel_1") |
aoqi@0 | 3734 | * tmp$ = caseLabelToPosition("caseLabel_1"); |
aoqi@0 | 3735 | * else if (s$.equals("caseLabel_2")) |
aoqi@0 | 3736 | * tmp$ = caseLabelToPosition("caseLabel_2"); |
aoqi@0 | 3737 | * ... |
aoqi@0 | 3738 | * break; |
aoqi@0 | 3739 | * ... |
aoqi@0 | 3740 | * } |
aoqi@0 | 3741 | */ |
aoqi@0 | 3742 | |
aoqi@0 | 3743 | VarSymbol dollar_s = new VarSymbol(FINAL|SYNTHETIC, |
aoqi@0 | 3744 | names.fromString("s" + tree.pos + target.syntheticNameChar()), |
aoqi@0 | 3745 | syms.stringType, |
aoqi@0 | 3746 | currentMethodSym); |
aoqi@0 | 3747 | stmtList.append(make.at(tree.pos()).VarDef(dollar_s, tree.getExpression()).setType(dollar_s.type)); |
aoqi@0 | 3748 | |
aoqi@0 | 3749 | VarSymbol dollar_tmp = new VarSymbol(SYNTHETIC, |
aoqi@0 | 3750 | names.fromString("tmp" + tree.pos + target.syntheticNameChar()), |
aoqi@0 | 3751 | syms.intType, |
aoqi@0 | 3752 | currentMethodSym); |
aoqi@0 | 3753 | JCVariableDecl dollar_tmp_def = |
aoqi@0 | 3754 | (JCVariableDecl)make.VarDef(dollar_tmp, make.Literal(INT, -1)).setType(dollar_tmp.type); |
aoqi@0 | 3755 | dollar_tmp_def.init.type = dollar_tmp.type = syms.intType; |
aoqi@0 | 3756 | stmtList.append(dollar_tmp_def); |
aoqi@0 | 3757 | ListBuffer<JCCase> caseBuffer = new ListBuffer<>(); |
aoqi@0 | 3758 | // hashCode will trigger nullcheck on original switch expression |
aoqi@0 | 3759 | JCMethodInvocation hashCodeCall = makeCall(make.Ident(dollar_s), |
aoqi@0 | 3760 | names.hashCode, |
aoqi@0 | 3761 | List.<JCExpression>nil()).setType(syms.intType); |
aoqi@0 | 3762 | JCSwitch switch1 = make.Switch(hashCodeCall, |
aoqi@0 | 3763 | caseBuffer.toList()); |
aoqi@0 | 3764 | for(Map.Entry<Integer, Set<String>> entry : hashToString.entrySet()) { |
aoqi@0 | 3765 | int hashCode = entry.getKey(); |
aoqi@0 | 3766 | Set<String> stringsWithHashCode = entry.getValue(); |
aoqi@0 | 3767 | Assert.check(stringsWithHashCode.size() >= 1); |
aoqi@0 | 3768 | |
aoqi@0 | 3769 | JCStatement elsepart = null; |
aoqi@0 | 3770 | for(String caseLabel : stringsWithHashCode ) { |
aoqi@0 | 3771 | JCMethodInvocation stringEqualsCall = makeCall(make.Ident(dollar_s), |
aoqi@0 | 3772 | names.equals, |
aoqi@0 | 3773 | List.<JCExpression>of(make.Literal(caseLabel))); |
aoqi@0 | 3774 | elsepart = make.If(stringEqualsCall, |
aoqi@0 | 3775 | make.Exec(make.Assign(make.Ident(dollar_tmp), |
aoqi@0 | 3776 | make.Literal(caseLabelToPosition.get(caseLabel))). |
aoqi@0 | 3777 | setType(dollar_tmp.type)), |
aoqi@0 | 3778 | elsepart); |
aoqi@0 | 3779 | } |
aoqi@0 | 3780 | |
aoqi@0 | 3781 | ListBuffer<JCStatement> lb = new ListBuffer<>(); |
aoqi@0 | 3782 | JCBreak breakStmt = make.Break(null); |
aoqi@0 | 3783 | breakStmt.target = switch1; |
aoqi@0 | 3784 | lb.append(elsepart).append(breakStmt); |
aoqi@0 | 3785 | |
aoqi@0 | 3786 | caseBuffer.append(make.Case(make.Literal(hashCode), lb.toList())); |
aoqi@0 | 3787 | } |
aoqi@0 | 3788 | |
aoqi@0 | 3789 | switch1.cases = caseBuffer.toList(); |
aoqi@0 | 3790 | stmtList.append(switch1); |
aoqi@0 | 3791 | |
aoqi@0 | 3792 | // Make isomorphic switch tree replacing string labels |
aoqi@0 | 3793 | // with corresponding integer ones from the label to |
aoqi@0 | 3794 | // position map. |
aoqi@0 | 3795 | |
aoqi@0 | 3796 | ListBuffer<JCCase> lb = new ListBuffer<>(); |
aoqi@0 | 3797 | JCSwitch switch2 = make.Switch(make.Ident(dollar_tmp), lb.toList()); |
aoqi@0 | 3798 | for(JCCase oneCase : caseList ) { |
aoqi@0 | 3799 | // Rewire up old unlabeled break statements to the |
aoqi@0 | 3800 | // replacement switch being created. |
aoqi@0 | 3801 | patchTargets(oneCase, tree, switch2); |
aoqi@0 | 3802 | |
aoqi@0 | 3803 | boolean isDefault = (oneCase.getExpression() == null); |
aoqi@0 | 3804 | JCExpression caseExpr; |
aoqi@0 | 3805 | if (isDefault) |
aoqi@0 | 3806 | caseExpr = null; |
aoqi@0 | 3807 | else { |
aoqi@0 | 3808 | caseExpr = make.Literal(caseLabelToPosition.get((String)TreeInfo.skipParens(oneCase. |
aoqi@0 | 3809 | getExpression()). |
aoqi@0 | 3810 | type.constValue())); |
aoqi@0 | 3811 | } |
aoqi@0 | 3812 | |
aoqi@0 | 3813 | lb.append(make.Case(caseExpr, |
aoqi@0 | 3814 | oneCase.getStatements())); |
aoqi@0 | 3815 | } |
aoqi@0 | 3816 | |
aoqi@0 | 3817 | switch2.cases = lb.toList(); |
aoqi@0 | 3818 | stmtList.append(switch2); |
aoqi@0 | 3819 | |
aoqi@0 | 3820 | return make.Block(0L, stmtList.toList()); |
aoqi@0 | 3821 | } |
aoqi@0 | 3822 | } |
aoqi@0 | 3823 | |
aoqi@0 | 3824 | public void visitNewArray(JCNewArray tree) { |
aoqi@0 | 3825 | tree.elemtype = translate(tree.elemtype); |
aoqi@0 | 3826 | for (List<JCExpression> t = tree.dims; t.tail != null; t = t.tail) |
aoqi@0 | 3827 | if (t.head != null) t.head = translate(t.head, syms.intType); |
aoqi@0 | 3828 | tree.elems = translate(tree.elems, types.elemtype(tree.type)); |
aoqi@0 | 3829 | result = tree; |
aoqi@0 | 3830 | } |
aoqi@0 | 3831 | |
aoqi@0 | 3832 | public void visitSelect(JCFieldAccess tree) { |
aoqi@0 | 3833 | // need to special case-access of the form C.super.x |
aoqi@0 | 3834 | // these will always need an access method, unless C |
aoqi@0 | 3835 | // is a default interface subclassed by the current class. |
aoqi@0 | 3836 | boolean qualifiedSuperAccess = |
aoqi@0 | 3837 | tree.selected.hasTag(SELECT) && |
aoqi@0 | 3838 | TreeInfo.name(tree.selected) == names._super && |
aoqi@0 | 3839 | !types.isDirectSuperInterface(((JCFieldAccess)tree.selected).selected.type.tsym, currentClass); |
aoqi@0 | 3840 | tree.selected = translate(tree.selected); |
aoqi@0 | 3841 | if (tree.name == names._class) { |
aoqi@0 | 3842 | result = classOf(tree.selected); |
aoqi@0 | 3843 | } |
aoqi@0 | 3844 | else if (tree.name == names._super && |
aoqi@0 | 3845 | types.isDirectSuperInterface(tree.selected.type.tsym, currentClass)) { |
aoqi@0 | 3846 | //default super call!! Not a classic qualified super call |
aoqi@0 | 3847 | TypeSymbol supSym = tree.selected.type.tsym; |
aoqi@0 | 3848 | Assert.checkNonNull(types.asSuper(currentClass.type, supSym)); |
aoqi@0 | 3849 | result = tree; |
aoqi@0 | 3850 | } |
aoqi@0 | 3851 | else if (tree.name == names._this || tree.name == names._super) { |
aoqi@0 | 3852 | result = makeThis(tree.pos(), tree.selected.type.tsym); |
aoqi@0 | 3853 | } |
aoqi@0 | 3854 | else |
aoqi@0 | 3855 | result = access(tree.sym, tree, enclOp, qualifiedSuperAccess); |
aoqi@0 | 3856 | } |
aoqi@0 | 3857 | |
aoqi@0 | 3858 | public void visitLetExpr(LetExpr tree) { |
aoqi@0 | 3859 | tree.defs = translateVarDefs(tree.defs); |
aoqi@0 | 3860 | tree.expr = translate(tree.expr, tree.type); |
aoqi@0 | 3861 | result = tree; |
aoqi@0 | 3862 | } |
aoqi@0 | 3863 | |
aoqi@0 | 3864 | // There ought to be nothing to rewrite here; |
aoqi@0 | 3865 | // we don't generate code. |
aoqi@0 | 3866 | public void visitAnnotation(JCAnnotation tree) { |
aoqi@0 | 3867 | result = tree; |
aoqi@0 | 3868 | } |
aoqi@0 | 3869 | |
aoqi@0 | 3870 | @Override |
aoqi@0 | 3871 | public void visitTry(JCTry tree) { |
aoqi@0 | 3872 | if (tree.resources.nonEmpty()) { |
aoqi@0 | 3873 | result = makeTwrTry(tree); |
aoqi@0 | 3874 | return; |
aoqi@0 | 3875 | } |
aoqi@0 | 3876 | |
aoqi@0 | 3877 | boolean hasBody = tree.body.getStatements().nonEmpty(); |
aoqi@0 | 3878 | boolean hasCatchers = tree.catchers.nonEmpty(); |
aoqi@0 | 3879 | boolean hasFinally = tree.finalizer != null && |
aoqi@0 | 3880 | tree.finalizer.getStatements().nonEmpty(); |
aoqi@0 | 3881 | |
aoqi@0 | 3882 | if (!hasCatchers && !hasFinally) { |
aoqi@0 | 3883 | result = translate(tree.body); |
aoqi@0 | 3884 | return; |
aoqi@0 | 3885 | } |
aoqi@0 | 3886 | |
aoqi@0 | 3887 | if (!hasBody) { |
aoqi@0 | 3888 | if (hasFinally) { |
aoqi@0 | 3889 | result = translate(tree.finalizer); |
aoqi@0 | 3890 | } else { |
aoqi@0 | 3891 | result = translate(tree.body); |
aoqi@0 | 3892 | } |
aoqi@0 | 3893 | return; |
aoqi@0 | 3894 | } |
aoqi@0 | 3895 | |
aoqi@0 | 3896 | // no optimizations possible |
aoqi@0 | 3897 | super.visitTry(tree); |
aoqi@0 | 3898 | } |
aoqi@0 | 3899 | |
aoqi@0 | 3900 | /************************************************************************** |
aoqi@0 | 3901 | * main method |
aoqi@0 | 3902 | *************************************************************************/ |
aoqi@0 | 3903 | |
aoqi@0 | 3904 | /** Translate a toplevel class and return a list consisting of |
aoqi@0 | 3905 | * the translated class and translated versions of all inner classes. |
aoqi@0 | 3906 | * @param env The attribution environment current at the class definition. |
aoqi@0 | 3907 | * We need this for resolving some additional symbols. |
aoqi@0 | 3908 | * @param cdef The tree representing the class definition. |
aoqi@0 | 3909 | */ |
aoqi@0 | 3910 | public List<JCTree> translateTopLevelClass(Env<AttrContext> env, JCTree cdef, TreeMaker make) { |
aoqi@0 | 3911 | ListBuffer<JCTree> translated = null; |
aoqi@0 | 3912 | try { |
aoqi@0 | 3913 | attrEnv = env; |
aoqi@0 | 3914 | this.make = make; |
aoqi@0 | 3915 | endPosTable = env.toplevel.endPositions; |
aoqi@0 | 3916 | currentClass = null; |
aoqi@0 | 3917 | currentMethodDef = null; |
aoqi@0 | 3918 | outermostClassDef = (cdef.hasTag(CLASSDEF)) ? (JCClassDecl)cdef : null; |
aoqi@0 | 3919 | outermostMemberDef = null; |
aoqi@0 | 3920 | this.translated = new ListBuffer<JCTree>(); |
aoqi@0 | 3921 | classdefs = new HashMap<ClassSymbol,JCClassDecl>(); |
aoqi@0 | 3922 | actualSymbols = new HashMap<Symbol,Symbol>(); |
aoqi@0 | 3923 | freevarCache = new HashMap<ClassSymbol,List<VarSymbol>>(); |
aoqi@0 | 3924 | proxies = new Scope(syms.noSymbol); |
aoqi@0 | 3925 | twrVars = new Scope(syms.noSymbol); |
aoqi@0 | 3926 | outerThisStack = List.nil(); |
aoqi@0 | 3927 | accessNums = new HashMap<Symbol,Integer>(); |
aoqi@0 | 3928 | accessSyms = new HashMap<Symbol,MethodSymbol[]>(); |
aoqi@0 | 3929 | accessConstrs = new HashMap<Symbol,MethodSymbol>(); |
aoqi@0 | 3930 | accessConstrTags = List.nil(); |
aoqi@0 | 3931 | accessed = new ListBuffer<Symbol>(); |
aoqi@0 | 3932 | translate(cdef, (JCExpression)null); |
aoqi@0 | 3933 | for (List<Symbol> l = accessed.toList(); l.nonEmpty(); l = l.tail) |
aoqi@0 | 3934 | makeAccessible(l.head); |
aoqi@0 | 3935 | for (EnumMapping map : enumSwitchMap.values()) |
aoqi@0 | 3936 | map.translate(); |
aoqi@0 | 3937 | checkConflicts(this.translated.toList()); |
aoqi@0 | 3938 | checkAccessConstructorTags(); |
aoqi@0 | 3939 | translated = this.translated; |
aoqi@0 | 3940 | } finally { |
aoqi@0 | 3941 | // note that recursive invocations of this method fail hard |
aoqi@0 | 3942 | attrEnv = null; |
aoqi@0 | 3943 | this.make = null; |
aoqi@0 | 3944 | endPosTable = null; |
aoqi@0 | 3945 | currentClass = null; |
aoqi@0 | 3946 | currentMethodDef = null; |
aoqi@0 | 3947 | outermostClassDef = null; |
aoqi@0 | 3948 | outermostMemberDef = null; |
aoqi@0 | 3949 | this.translated = null; |
aoqi@0 | 3950 | classdefs = null; |
aoqi@0 | 3951 | actualSymbols = null; |
aoqi@0 | 3952 | freevarCache = null; |
aoqi@0 | 3953 | proxies = null; |
aoqi@0 | 3954 | outerThisStack = null; |
aoqi@0 | 3955 | accessNums = null; |
aoqi@0 | 3956 | accessSyms = null; |
aoqi@0 | 3957 | accessConstrs = null; |
aoqi@0 | 3958 | accessConstrTags = null; |
aoqi@0 | 3959 | accessed = null; |
aoqi@0 | 3960 | enumSwitchMap.clear(); |
aoqi@0 | 3961 | assertionsDisabledClassCache = null; |
aoqi@0 | 3962 | } |
aoqi@0 | 3963 | return translated.toList(); |
aoqi@0 | 3964 | } |
aoqi@0 | 3965 | } |