Fri, 06 Sep 2013 09:53:24 +0100
8024039: javac, previous solution for JDK-8022186 was incorrect
Reviewed-by: jjg
duke@1 | 1 | /* |
jjg@1521 | 2 | * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
duke@1 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@1 | 4 | * |
duke@1 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@1 | 6 | * under the terms of the GNU General Public License version 2 only, as |
ohair@554 | 7 | * published by the Free Software Foundation. Oracle designates this |
duke@1 | 8 | * particular file as subject to the "Classpath" exception as provided |
ohair@554 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
duke@1 | 10 | * |
duke@1 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@1 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@1 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@1 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@1 | 15 | * accompanied this code). |
duke@1 | 16 | * |
duke@1 | 17 | * You should have received a copy of the GNU General Public License version |
duke@1 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@1 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@1 | 20 | * |
ohair@554 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
ohair@554 | 22 | * or visit www.oracle.com if you need additional information or have any |
ohair@554 | 23 | * questions. |
duke@1 | 24 | */ |
duke@1 | 25 | |
duke@1 | 26 | package com.sun.tools.javac.jvm; |
duke@1 | 27 | import java.util.*; |
duke@1 | 28 | |
duke@1 | 29 | import com.sun.tools.javac.util.*; |
duke@1 | 30 | import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; |
duke@1 | 31 | import com.sun.tools.javac.util.List; |
duke@1 | 32 | import com.sun.tools.javac.code.*; |
jjg@1755 | 33 | import com.sun.tools.javac.code.Attribute.TypeCompound; |
jjg@1755 | 34 | import com.sun.tools.javac.code.Symbol.VarSymbol; |
duke@1 | 35 | import com.sun.tools.javac.comp.*; |
duke@1 | 36 | import com.sun.tools.javac.tree.*; |
duke@1 | 37 | |
duke@1 | 38 | import com.sun.tools.javac.code.Symbol.*; |
duke@1 | 39 | import com.sun.tools.javac.code.Type.*; |
duke@1 | 40 | import com.sun.tools.javac.jvm.Code.*; |
duke@1 | 41 | import com.sun.tools.javac.jvm.Items.*; |
jjg@1280 | 42 | import com.sun.tools.javac.tree.EndPosTable; |
duke@1 | 43 | import com.sun.tools.javac.tree.JCTree.*; |
duke@1 | 44 | |
duke@1 | 45 | import static com.sun.tools.javac.code.Flags.*; |
duke@1 | 46 | import static com.sun.tools.javac.code.Kinds.*; |
jjg@1374 | 47 | import static com.sun.tools.javac.code.TypeTag.*; |
duke@1 | 48 | import static com.sun.tools.javac.jvm.ByteCodes.*; |
duke@1 | 49 | import static com.sun.tools.javac.jvm.CRTFlags.*; |
jjg@1157 | 50 | import static com.sun.tools.javac.main.Option.*; |
jjg@1127 | 51 | import static com.sun.tools.javac.tree.JCTree.Tag.*; |
duke@1 | 52 | |
duke@1 | 53 | /** This pass maps flat Java (i.e. without inner classes) to bytecodes. |
duke@1 | 54 | * |
jjg@581 | 55 | * <p><b>This is NOT part of any supported API. |
jjg@581 | 56 | * If you write code that depends on this, you do so at your own risk. |
duke@1 | 57 | * This code and its internal interfaces are subject to change or |
duke@1 | 58 | * deletion without notice.</b> |
duke@1 | 59 | */ |
duke@1 | 60 | public class Gen extends JCTree.Visitor { |
duke@1 | 61 | protected static final Context.Key<Gen> genKey = |
duke@1 | 62 | new Context.Key<Gen>(); |
duke@1 | 63 | |
duke@1 | 64 | private final Log log; |
duke@1 | 65 | private final Symtab syms; |
duke@1 | 66 | private final Check chk; |
duke@1 | 67 | private final Resolve rs; |
duke@1 | 68 | private final TreeMaker make; |
jjg@113 | 69 | private final Names names; |
duke@1 | 70 | private final Target target; |
duke@1 | 71 | private final Type stringBufferType; |
duke@1 | 72 | private final Map<Type,Symbol> stringBufferAppend; |
duke@1 | 73 | private Name accessDollar; |
duke@1 | 74 | private final Types types; |
vromero@1432 | 75 | private final Lower lower; |
duke@1 | 76 | |
duke@1 | 77 | /** Switch: GJ mode? |
duke@1 | 78 | */ |
duke@1 | 79 | private final boolean allowGenerics; |
duke@1 | 80 | |
duke@1 | 81 | /** Set when Miranda method stubs are to be generated. */ |
duke@1 | 82 | private final boolean generateIproxies; |
duke@1 | 83 | |
duke@1 | 84 | /** Format of stackmap tables to be generated. */ |
duke@1 | 85 | private final Code.StackMapFormat stackMap; |
duke@1 | 86 | |
duke@1 | 87 | /** A type that serves as the expected type for all method expressions. |
duke@1 | 88 | */ |
duke@1 | 89 | private final Type methodType; |
duke@1 | 90 | |
duke@1 | 91 | public static Gen instance(Context context) { |
duke@1 | 92 | Gen instance = context.get(genKey); |
duke@1 | 93 | if (instance == null) |
duke@1 | 94 | instance = new Gen(context); |
duke@1 | 95 | return instance; |
duke@1 | 96 | } |
duke@1 | 97 | |
vromero@1452 | 98 | /* Constant pool, reset by genClass. |
vromero@1452 | 99 | */ |
vromero@1452 | 100 | private Pool pool; |
vromero@1452 | 101 | |
duke@1 | 102 | protected Gen(Context context) { |
duke@1 | 103 | context.put(genKey, this); |
duke@1 | 104 | |
jjg@113 | 105 | names = Names.instance(context); |
duke@1 | 106 | log = Log.instance(context); |
duke@1 | 107 | syms = Symtab.instance(context); |
duke@1 | 108 | chk = Check.instance(context); |
duke@1 | 109 | rs = Resolve.instance(context); |
duke@1 | 110 | make = TreeMaker.instance(context); |
duke@1 | 111 | target = Target.instance(context); |
duke@1 | 112 | types = Types.instance(context); |
duke@1 | 113 | methodType = new MethodType(null, null, null, syms.methodClass); |
duke@1 | 114 | allowGenerics = Source.instance(context).allowGenerics(); |
duke@1 | 115 | stringBufferType = target.useStringBuilder() |
duke@1 | 116 | ? syms.stringBuilderType |
duke@1 | 117 | : syms.stringBufferType; |
duke@1 | 118 | stringBufferAppend = new HashMap<Type,Symbol>(); |
duke@1 | 119 | accessDollar = names. |
duke@1 | 120 | fromString("access" + target.syntheticNameChar()); |
vromero@1432 | 121 | lower = Lower.instance(context); |
duke@1 | 122 | |
duke@1 | 123 | Options options = Options.instance(context); |
duke@1 | 124 | lineDebugInfo = |
jjg@700 | 125 | options.isUnset(G_CUSTOM) || |
jjg@700 | 126 | options.isSet(G_CUSTOM, "lines"); |
duke@1 | 127 | varDebugInfo = |
jjg@700 | 128 | options.isUnset(G_CUSTOM) |
jjg@700 | 129 | ? options.isSet(G) |
jjg@700 | 130 | : options.isSet(G_CUSTOM, "vars"); |
jjg@700 | 131 | genCrt = options.isSet(XJCOV); |
jjg@700 | 132 | debugCode = options.isSet("debugcode"); |
jjg@700 | 133 | allowInvokedynamic = target.hasInvokedynamic() || options.isSet("invokedynamic"); |
vromero@1452 | 134 | pool = new Pool(types); |
duke@1 | 135 | |
duke@1 | 136 | generateIproxies = |
duke@1 | 137 | target.requiresIproxy() || |
jjg@700 | 138 | options.isSet("miranda"); |
duke@1 | 139 | |
duke@1 | 140 | if (target.generateStackMapTable()) { |
duke@1 | 141 | // ignore cldc because we cannot have both stackmap formats |
duke@1 | 142 | this.stackMap = StackMapFormat.JSR202; |
duke@1 | 143 | } else { |
duke@1 | 144 | if (target.generateCLDCStackmap()) { |
duke@1 | 145 | this.stackMap = StackMapFormat.CLDC; |
duke@1 | 146 | } else { |
duke@1 | 147 | this.stackMap = StackMapFormat.NONE; |
duke@1 | 148 | } |
duke@1 | 149 | } |
duke@1 | 150 | |
duke@1 | 151 | // by default, avoid jsr's for simple finalizers |
duke@1 | 152 | int setjsrlimit = 50; |
duke@1 | 153 | String jsrlimitString = options.get("jsrlimit"); |
duke@1 | 154 | if (jsrlimitString != null) { |
duke@1 | 155 | try { |
duke@1 | 156 | setjsrlimit = Integer.parseInt(jsrlimitString); |
duke@1 | 157 | } catch (NumberFormatException ex) { |
duke@1 | 158 | // ignore ill-formed numbers for jsrlimit |
duke@1 | 159 | } |
duke@1 | 160 | } |
duke@1 | 161 | this.jsrlimit = setjsrlimit; |
duke@1 | 162 | this.useJsrLocally = false; // reset in visitTry |
duke@1 | 163 | } |
duke@1 | 164 | |
duke@1 | 165 | /** Switches |
duke@1 | 166 | */ |
duke@1 | 167 | private final boolean lineDebugInfo; |
duke@1 | 168 | private final boolean varDebugInfo; |
duke@1 | 169 | private final boolean genCrt; |
duke@1 | 170 | private final boolean debugCode; |
jrose@267 | 171 | private final boolean allowInvokedynamic; |
duke@1 | 172 | |
duke@1 | 173 | /** Default limit of (approximate) size of finalizer to inline. |
duke@1 | 174 | * Zero means always use jsr. 100 or greater means never use |
duke@1 | 175 | * jsr. |
duke@1 | 176 | */ |
duke@1 | 177 | private final int jsrlimit; |
duke@1 | 178 | |
duke@1 | 179 | /** True if jsr is used. |
duke@1 | 180 | */ |
duke@1 | 181 | private boolean useJsrLocally; |
duke@1 | 182 | |
duke@1 | 183 | /** Code buffer, set by genMethod. |
duke@1 | 184 | */ |
duke@1 | 185 | private Code code; |
duke@1 | 186 | |
duke@1 | 187 | /** Items structure, set by genMethod. |
duke@1 | 188 | */ |
duke@1 | 189 | private Items items; |
duke@1 | 190 | |
duke@1 | 191 | /** Environment for symbol lookup, set by genClass |
duke@1 | 192 | */ |
duke@1 | 193 | private Env<AttrContext> attrEnv; |
duke@1 | 194 | |
duke@1 | 195 | /** The top level tree. |
duke@1 | 196 | */ |
duke@1 | 197 | private JCCompilationUnit toplevel; |
duke@1 | 198 | |
duke@1 | 199 | /** The number of code-gen errors in this class. |
duke@1 | 200 | */ |
duke@1 | 201 | private int nerrs = 0; |
duke@1 | 202 | |
ksrini@1138 | 203 | /** An object containing mappings of syntax trees to their |
ksrini@1138 | 204 | * ending source positions. |
duke@1 | 205 | */ |
ksrini@1138 | 206 | EndPosTable endPosTable; |
duke@1 | 207 | |
duke@1 | 208 | /** Generate code to load an integer constant. |
duke@1 | 209 | * @param n The integer to be loaded. |
duke@1 | 210 | */ |
duke@1 | 211 | void loadIntConst(int n) { |
duke@1 | 212 | items.makeImmediateItem(syms.intType, n).load(); |
duke@1 | 213 | } |
duke@1 | 214 | |
duke@1 | 215 | /** The opcode that loads a zero constant of a given type code. |
duke@1 | 216 | * @param tc The given type code (@see ByteCode). |
duke@1 | 217 | */ |
duke@1 | 218 | public static int zero(int tc) { |
duke@1 | 219 | switch(tc) { |
duke@1 | 220 | case INTcode: case BYTEcode: case SHORTcode: case CHARcode: |
duke@1 | 221 | return iconst_0; |
duke@1 | 222 | case LONGcode: |
duke@1 | 223 | return lconst_0; |
duke@1 | 224 | case FLOATcode: |
duke@1 | 225 | return fconst_0; |
duke@1 | 226 | case DOUBLEcode: |
duke@1 | 227 | return dconst_0; |
duke@1 | 228 | default: |
duke@1 | 229 | throw new AssertionError("zero"); |
duke@1 | 230 | } |
duke@1 | 231 | } |
duke@1 | 232 | |
duke@1 | 233 | /** The opcode that loads a one constant of a given type code. |
duke@1 | 234 | * @param tc The given type code (@see ByteCode). |
duke@1 | 235 | */ |
duke@1 | 236 | public static int one(int tc) { |
duke@1 | 237 | return zero(tc) + 1; |
duke@1 | 238 | } |
duke@1 | 239 | |
duke@1 | 240 | /** Generate code to load -1 of the given type code (either int or long). |
duke@1 | 241 | * @param tc The given type code (@see ByteCode). |
duke@1 | 242 | */ |
duke@1 | 243 | void emitMinusOne(int tc) { |
duke@1 | 244 | if (tc == LONGcode) { |
duke@1 | 245 | items.makeImmediateItem(syms.longType, new Long(-1)).load(); |
duke@1 | 246 | } else { |
duke@1 | 247 | code.emitop0(iconst_m1); |
duke@1 | 248 | } |
duke@1 | 249 | } |
duke@1 | 250 | |
duke@1 | 251 | /** Construct a symbol to reflect the qualifying type that should |
duke@1 | 252 | * appear in the byte code as per JLS 13.1. |
duke@1 | 253 | * |
jjg@1326 | 254 | * For {@literal target >= 1.2}: Clone a method with the qualifier as owner (except |
duke@1 | 255 | * for those cases where we need to work around VM bugs). |
duke@1 | 256 | * |
jjg@1326 | 257 | * For {@literal target <= 1.1}: If qualified variable or method is defined in a |
duke@1 | 258 | * non-accessible class, clone it with the qualifier class as owner. |
duke@1 | 259 | * |
duke@1 | 260 | * @param sym The accessed symbol |
duke@1 | 261 | * @param site The qualifier's type. |
duke@1 | 262 | */ |
duke@1 | 263 | Symbol binaryQualifier(Symbol sym, Type site) { |
duke@1 | 264 | |
jjg@1374 | 265 | if (site.hasTag(ARRAY)) { |
duke@1 | 266 | if (sym == syms.lengthVar || |
duke@1 | 267 | sym.owner != syms.arrayClass) |
duke@1 | 268 | return sym; |
duke@1 | 269 | // array clone can be qualified by the array type in later targets |
duke@1 | 270 | Symbol qualifier = target.arrayBinaryCompatibility() |
duke@1 | 271 | ? new ClassSymbol(Flags.PUBLIC, site.tsym.name, |
duke@1 | 272 | site, syms.noSymbol) |
duke@1 | 273 | : syms.objectType.tsym; |
duke@1 | 274 | return sym.clone(qualifier); |
duke@1 | 275 | } |
duke@1 | 276 | |
duke@1 | 277 | if (sym.owner == site.tsym || |
duke@1 | 278 | (sym.flags() & (STATIC | SYNTHETIC)) == (STATIC | SYNTHETIC)) { |
duke@1 | 279 | return sym; |
duke@1 | 280 | } |
duke@1 | 281 | if (!target.obeyBinaryCompatibility()) |
duke@1 | 282 | return rs.isAccessible(attrEnv, (TypeSymbol)sym.owner) |
duke@1 | 283 | ? sym |
duke@1 | 284 | : sym.clone(site.tsym); |
duke@1 | 285 | |
duke@1 | 286 | if (!target.interfaceFieldsBinaryCompatibility()) { |
duke@1 | 287 | if ((sym.owner.flags() & INTERFACE) != 0 && sym.kind == VAR) |
duke@1 | 288 | return sym; |
duke@1 | 289 | } |
duke@1 | 290 | |
duke@1 | 291 | // leave alone methods inherited from Object |
jjh@972 | 292 | // JLS 13.1. |
duke@1 | 293 | if (sym.owner == syms.objectType.tsym) |
duke@1 | 294 | return sym; |
duke@1 | 295 | |
duke@1 | 296 | if (!target.interfaceObjectOverridesBinaryCompatibility()) { |
duke@1 | 297 | if ((sym.owner.flags() & INTERFACE) != 0 && |
duke@1 | 298 | syms.objectType.tsym.members().lookup(sym.name).scope != null) |
duke@1 | 299 | return sym; |
duke@1 | 300 | } |
duke@1 | 301 | |
duke@1 | 302 | return sym.clone(site.tsym); |
duke@1 | 303 | } |
duke@1 | 304 | |
duke@1 | 305 | /** Insert a reference to given type in the constant pool, |
duke@1 | 306 | * checking for an array with too many dimensions; |
duke@1 | 307 | * return the reference's index. |
duke@1 | 308 | * @param type The type for which a reference is inserted. |
duke@1 | 309 | */ |
duke@1 | 310 | int makeRef(DiagnosticPosition pos, Type type) { |
duke@1 | 311 | checkDimension(pos, type); |
jjg@1755 | 312 | if (type.isAnnotated()) { |
jjg@1755 | 313 | // Treat annotated types separately - we don't want |
jjg@1755 | 314 | // to collapse all of them - at least for annotated |
jjg@1755 | 315 | // exceptions. |
jjg@1755 | 316 | // TODO: review this. |
jjg@1755 | 317 | return pool.put((Object)type); |
jjg@1755 | 318 | } else { |
jjg@1755 | 319 | return pool.put(type.hasTag(CLASS) ? (Object)type.tsym : (Object)type); |
jjg@1755 | 320 | } |
duke@1 | 321 | } |
duke@1 | 322 | |
duke@1 | 323 | /** Check if the given type is an array with too many dimensions. |
duke@1 | 324 | */ |
duke@1 | 325 | private void checkDimension(DiagnosticPosition pos, Type t) { |
jjg@1374 | 326 | switch (t.getTag()) { |
duke@1 | 327 | case METHOD: |
duke@1 | 328 | checkDimension(pos, t.getReturnType()); |
duke@1 | 329 | for (List<Type> args = t.getParameterTypes(); args.nonEmpty(); args = args.tail) |
duke@1 | 330 | checkDimension(pos, args.head); |
duke@1 | 331 | break; |
duke@1 | 332 | case ARRAY: |
duke@1 | 333 | if (types.dimensions(t) > ClassFile.MAX_DIMENSIONS) { |
duke@1 | 334 | log.error(pos, "limit.dimensions"); |
duke@1 | 335 | nerrs++; |
duke@1 | 336 | } |
duke@1 | 337 | break; |
duke@1 | 338 | default: |
duke@1 | 339 | break; |
duke@1 | 340 | } |
duke@1 | 341 | } |
duke@1 | 342 | |
duke@1 | 343 | /** Create a tempory variable. |
duke@1 | 344 | * @param type The variable's type. |
duke@1 | 345 | */ |
duke@1 | 346 | LocalItem makeTemp(Type type) { |
duke@1 | 347 | VarSymbol v = new VarSymbol(Flags.SYNTHETIC, |
duke@1 | 348 | names.empty, |
duke@1 | 349 | type, |
duke@1 | 350 | env.enclMethod.sym); |
duke@1 | 351 | code.newLocal(v); |
duke@1 | 352 | return items.makeLocalItem(v); |
duke@1 | 353 | } |
duke@1 | 354 | |
duke@1 | 355 | /** Generate code to call a non-private method or constructor. |
duke@1 | 356 | * @param pos Position to be used for error reporting. |
duke@1 | 357 | * @param site The type of which the method is a member. |
duke@1 | 358 | * @param name The method's name. |
duke@1 | 359 | * @param argtypes The method's argument types. |
duke@1 | 360 | * @param isStatic A flag that indicates whether we call a |
duke@1 | 361 | * static or instance method. |
duke@1 | 362 | */ |
duke@1 | 363 | void callMethod(DiagnosticPosition pos, |
duke@1 | 364 | Type site, Name name, List<Type> argtypes, |
duke@1 | 365 | boolean isStatic) { |
duke@1 | 366 | Symbol msym = rs. |
duke@1 | 367 | resolveInternalMethod(pos, attrEnv, site, name, argtypes, null); |
duke@1 | 368 | if (isStatic) items.makeStaticItem(msym).invoke(); |
duke@1 | 369 | else items.makeMemberItem(msym, name == names.init).invoke(); |
duke@1 | 370 | } |
duke@1 | 371 | |
duke@1 | 372 | /** Is the given method definition an access method |
duke@1 | 373 | * resulting from a qualified super? This is signified by an odd |
duke@1 | 374 | * access code. |
duke@1 | 375 | */ |
duke@1 | 376 | private boolean isAccessSuper(JCMethodDecl enclMethod) { |
duke@1 | 377 | return |
duke@1 | 378 | (enclMethod.mods.flags & SYNTHETIC) != 0 && |
duke@1 | 379 | isOddAccessName(enclMethod.name); |
duke@1 | 380 | } |
duke@1 | 381 | |
duke@1 | 382 | /** Does given name start with "access$" and end in an odd digit? |
duke@1 | 383 | */ |
duke@1 | 384 | private boolean isOddAccessName(Name name) { |
duke@1 | 385 | return |
duke@1 | 386 | name.startsWith(accessDollar) && |
jjg@113 | 387 | (name.getByteAt(name.getByteLength() - 1) & 1) == 1; |
duke@1 | 388 | } |
duke@1 | 389 | |
duke@1 | 390 | /* ************************************************************************ |
duke@1 | 391 | * Non-local exits |
duke@1 | 392 | *************************************************************************/ |
duke@1 | 393 | |
duke@1 | 394 | /** Generate code to invoke the finalizer associated with given |
duke@1 | 395 | * environment. |
duke@1 | 396 | * Any calls to finalizers are appended to the environments `cont' chain. |
duke@1 | 397 | * Mark beginning of gap in catch all range for finalizer. |
duke@1 | 398 | */ |
duke@1 | 399 | void genFinalizer(Env<GenContext> env) { |
duke@1 | 400 | if (code.isAlive() && env.info.finalize != null) |
duke@1 | 401 | env.info.finalize.gen(); |
duke@1 | 402 | } |
duke@1 | 403 | |
duke@1 | 404 | /** Generate code to call all finalizers of structures aborted by |
duke@1 | 405 | * a non-local |
duke@1 | 406 | * exit. Return target environment of the non-local exit. |
duke@1 | 407 | * @param target The tree representing the structure that's aborted |
duke@1 | 408 | * @param env The environment current at the non-local exit. |
duke@1 | 409 | */ |
duke@1 | 410 | Env<GenContext> unwind(JCTree target, Env<GenContext> env) { |
duke@1 | 411 | Env<GenContext> env1 = env; |
duke@1 | 412 | while (true) { |
duke@1 | 413 | genFinalizer(env1); |
duke@1 | 414 | if (env1.tree == target) break; |
duke@1 | 415 | env1 = env1.next; |
duke@1 | 416 | } |
duke@1 | 417 | return env1; |
duke@1 | 418 | } |
duke@1 | 419 | |
duke@1 | 420 | /** Mark end of gap in catch-all range for finalizer. |
duke@1 | 421 | * @param env the environment which might contain the finalizer |
duke@1 | 422 | * (if it does, env.info.gaps != null). |
duke@1 | 423 | */ |
duke@1 | 424 | void endFinalizerGap(Env<GenContext> env) { |
duke@1 | 425 | if (env.info.gaps != null && env.info.gaps.length() % 2 == 1) |
duke@1 | 426 | env.info.gaps.append(code.curPc()); |
duke@1 | 427 | } |
duke@1 | 428 | |
duke@1 | 429 | /** Mark end of all gaps in catch-all ranges for finalizers of environments |
duke@1 | 430 | * lying between, and including to two environments. |
duke@1 | 431 | * @param from the most deeply nested environment to mark |
duke@1 | 432 | * @param to the least deeply nested environment to mark |
duke@1 | 433 | */ |
duke@1 | 434 | void endFinalizerGaps(Env<GenContext> from, Env<GenContext> to) { |
duke@1 | 435 | Env<GenContext> last = null; |
duke@1 | 436 | while (last != to) { |
duke@1 | 437 | endFinalizerGap(from); |
duke@1 | 438 | last = from; |
duke@1 | 439 | from = from.next; |
duke@1 | 440 | } |
duke@1 | 441 | } |
duke@1 | 442 | |
duke@1 | 443 | /** Do any of the structures aborted by a non-local exit have |
duke@1 | 444 | * finalizers that require an empty stack? |
duke@1 | 445 | * @param target The tree representing the structure that's aborted |
duke@1 | 446 | * @param env The environment current at the non-local exit. |
duke@1 | 447 | */ |
duke@1 | 448 | boolean hasFinally(JCTree target, Env<GenContext> env) { |
duke@1 | 449 | while (env.tree != target) { |
jjg@1127 | 450 | if (env.tree.hasTag(TRY) && env.info.finalize.hasFinalizer()) |
duke@1 | 451 | return true; |
duke@1 | 452 | env = env.next; |
duke@1 | 453 | } |
duke@1 | 454 | return false; |
duke@1 | 455 | } |
duke@1 | 456 | |
duke@1 | 457 | /* ************************************************************************ |
duke@1 | 458 | * Normalizing class-members. |
duke@1 | 459 | *************************************************************************/ |
duke@1 | 460 | |
jjg@1358 | 461 | /** Distribute member initializer code into constructors and {@code <clinit>} |
duke@1 | 462 | * method. |
duke@1 | 463 | * @param defs The list of class member declarations. |
duke@1 | 464 | * @param c The enclosing class. |
duke@1 | 465 | */ |
duke@1 | 466 | List<JCTree> normalizeDefs(List<JCTree> defs, ClassSymbol c) { |
duke@1 | 467 | ListBuffer<JCStatement> initCode = new ListBuffer<JCStatement>(); |
jjg@1755 | 468 | ListBuffer<Attribute.TypeCompound> initTAs = new ListBuffer<Attribute.TypeCompound>(); |
duke@1 | 469 | ListBuffer<JCStatement> clinitCode = new ListBuffer<JCStatement>(); |
jjg@1755 | 470 | ListBuffer<Attribute.TypeCompound> clinitTAs = new ListBuffer<Attribute.TypeCompound>(); |
duke@1 | 471 | ListBuffer<JCTree> methodDefs = new ListBuffer<JCTree>(); |
duke@1 | 472 | // Sort definitions into three listbuffers: |
duke@1 | 473 | // - initCode for instance initializers |
duke@1 | 474 | // - clinitCode for class initializers |
duke@1 | 475 | // - methodDefs for method definitions |
duke@1 | 476 | for (List<JCTree> l = defs; l.nonEmpty(); l = l.tail) { |
duke@1 | 477 | JCTree def = l.head; |
duke@1 | 478 | switch (def.getTag()) { |
jjg@1127 | 479 | case BLOCK: |
duke@1 | 480 | JCBlock block = (JCBlock)def; |
duke@1 | 481 | if ((block.flags & STATIC) != 0) |
duke@1 | 482 | clinitCode.append(block); |
duke@1 | 483 | else |
duke@1 | 484 | initCode.append(block); |
duke@1 | 485 | break; |
jjg@1127 | 486 | case METHODDEF: |
duke@1 | 487 | methodDefs.append(def); |
duke@1 | 488 | break; |
jjg@1127 | 489 | case VARDEF: |
duke@1 | 490 | JCVariableDecl vdef = (JCVariableDecl) def; |
duke@1 | 491 | VarSymbol sym = vdef.sym; |
duke@1 | 492 | checkDimension(vdef.pos(), sym.type); |
duke@1 | 493 | if (vdef.init != null) { |
duke@1 | 494 | if ((sym.flags() & STATIC) == 0) { |
duke@1 | 495 | // Always initialize instance variables. |
duke@1 | 496 | JCStatement init = make.at(vdef.pos()). |
duke@1 | 497 | Assignment(sym, vdef.init); |
duke@1 | 498 | initCode.append(init); |
ksrini@1138 | 499 | endPosTable.replaceTree(vdef, init); |
jjg@1755 | 500 | initTAs.addAll(getAndRemoveNonFieldTAs(sym)); |
duke@1 | 501 | } else if (sym.getConstValue() == null) { |
duke@1 | 502 | // Initialize class (static) variables only if |
duke@1 | 503 | // they are not compile-time constants. |
duke@1 | 504 | JCStatement init = make.at(vdef.pos). |
duke@1 | 505 | Assignment(sym, vdef.init); |
duke@1 | 506 | clinitCode.append(init); |
ksrini@1138 | 507 | endPosTable.replaceTree(vdef, init); |
jjg@1755 | 508 | clinitTAs.addAll(getAndRemoveNonFieldTAs(sym)); |
duke@1 | 509 | } else { |
duke@1 | 510 | checkStringConstant(vdef.init.pos(), sym.getConstValue()); |
duke@1 | 511 | } |
duke@1 | 512 | } |
duke@1 | 513 | break; |
duke@1 | 514 | default: |
jjg@816 | 515 | Assert.error(); |
duke@1 | 516 | } |
duke@1 | 517 | } |
duke@1 | 518 | // Insert any instance initializers into all constructors. |
duke@1 | 519 | if (initCode.length() != 0) { |
duke@1 | 520 | List<JCStatement> inits = initCode.toList(); |
jjg@1802 | 521 | initTAs.addAll(c.getInitTypeAttributes()); |
jjg@1755 | 522 | List<Attribute.TypeCompound> initTAlist = initTAs.toList(); |
duke@1 | 523 | for (JCTree t : methodDefs) { |
jjg@1755 | 524 | normalizeMethod((JCMethodDecl)t, inits, initTAlist); |
duke@1 | 525 | } |
duke@1 | 526 | } |
duke@1 | 527 | // If there are class initializers, create a <clinit> method |
duke@1 | 528 | // that contains them as its body. |
duke@1 | 529 | if (clinitCode.length() != 0) { |
duke@1 | 530 | MethodSymbol clinit = new MethodSymbol( |
vromero@1555 | 531 | STATIC | (c.flags() & STRICTFP), |
vromero@1555 | 532 | names.clinit, |
duke@1 | 533 | new MethodType( |
duke@1 | 534 | List.<Type>nil(), syms.voidType, |
duke@1 | 535 | List.<Type>nil(), syms.methodClass), |
duke@1 | 536 | c); |
duke@1 | 537 | c.members().enter(clinit); |
duke@1 | 538 | List<JCStatement> clinitStats = clinitCode.toList(); |
duke@1 | 539 | JCBlock block = make.at(clinitStats.head.pos()).Block(0, clinitStats); |
duke@1 | 540 | block.endpos = TreeInfo.endPos(clinitStats.last()); |
duke@1 | 541 | methodDefs.append(make.MethodDef(clinit, block)); |
jjg@1755 | 542 | |
jjg@1755 | 543 | if (!clinitTAs.isEmpty()) |
jjg@1802 | 544 | clinit.appendUniqueTypeAttributes(clinitTAs.toList()); |
jjg@1802 | 545 | if (!c.getClassInitTypeAttributes().isEmpty()) |
jjg@1802 | 546 | clinit.appendUniqueTypeAttributes(c.getClassInitTypeAttributes()); |
duke@1 | 547 | } |
duke@1 | 548 | // Return all method definitions. |
duke@1 | 549 | return methodDefs.toList(); |
duke@1 | 550 | } |
duke@1 | 551 | |
jjg@1755 | 552 | private List<Attribute.TypeCompound> getAndRemoveNonFieldTAs(VarSymbol sym) { |
jjg@1755 | 553 | List<TypeCompound> tas = sym.getRawTypeAttributes(); |
jjg@1755 | 554 | ListBuffer<Attribute.TypeCompound> fieldTAs = new ListBuffer<Attribute.TypeCompound>(); |
jjg@1755 | 555 | ListBuffer<Attribute.TypeCompound> nonfieldTAs = new ListBuffer<Attribute.TypeCompound>(); |
jjg@1755 | 556 | for (TypeCompound ta : tas) { |
jjg@1755 | 557 | if (ta.position.type == TargetType.FIELD) { |
jjg@1755 | 558 | fieldTAs.add(ta); |
jjg@1755 | 559 | } else { |
jjg@1755 | 560 | nonfieldTAs.add(ta); |
jjg@1755 | 561 | } |
jjg@1755 | 562 | } |
jjg@1802 | 563 | sym.setTypeAttributes(fieldTAs.toList()); |
jjg@1755 | 564 | return nonfieldTAs.toList(); |
jjg@1755 | 565 | } |
jjg@1755 | 566 | |
duke@1 | 567 | /** Check a constant value and report if it is a string that is |
duke@1 | 568 | * too large. |
duke@1 | 569 | */ |
duke@1 | 570 | private void checkStringConstant(DiagnosticPosition pos, Object constValue) { |
duke@1 | 571 | if (nerrs != 0 || // only complain about a long string once |
duke@1 | 572 | constValue == null || |
duke@1 | 573 | !(constValue instanceof String) || |
duke@1 | 574 | ((String)constValue).length() < Pool.MAX_STRING_LENGTH) |
duke@1 | 575 | return; |
duke@1 | 576 | log.error(pos, "limit.string"); |
duke@1 | 577 | nerrs++; |
duke@1 | 578 | } |
duke@1 | 579 | |
duke@1 | 580 | /** Insert instance initializer code into initial constructor. |
duke@1 | 581 | * @param md The tree potentially representing a |
duke@1 | 582 | * constructor's definition. |
duke@1 | 583 | * @param initCode The list of instance initializer statements. |
jjg@1755 | 584 | * @param initTAs Type annotations from the initializer expression. |
duke@1 | 585 | */ |
jjg@1755 | 586 | void normalizeMethod(JCMethodDecl md, List<JCStatement> initCode, List<TypeCompound> initTAs) { |
duke@1 | 587 | if (md.name == names.init && TreeInfo.isInitialConstructor(md)) { |
duke@1 | 588 | // We are seeing a constructor that does not call another |
duke@1 | 589 | // constructor of the same class. |
duke@1 | 590 | List<JCStatement> stats = md.body.stats; |
duke@1 | 591 | ListBuffer<JCStatement> newstats = new ListBuffer<JCStatement>(); |
duke@1 | 592 | |
duke@1 | 593 | if (stats.nonEmpty()) { |
duke@1 | 594 | // Copy initializers of synthetic variables generated in |
duke@1 | 595 | // the translation of inner classes. |
duke@1 | 596 | while (TreeInfo.isSyntheticInit(stats.head)) { |
duke@1 | 597 | newstats.append(stats.head); |
duke@1 | 598 | stats = stats.tail; |
duke@1 | 599 | } |
duke@1 | 600 | // Copy superclass constructor call |
duke@1 | 601 | newstats.append(stats.head); |
duke@1 | 602 | stats = stats.tail; |
duke@1 | 603 | // Copy remaining synthetic initializers. |
duke@1 | 604 | while (stats.nonEmpty() && |
duke@1 | 605 | TreeInfo.isSyntheticInit(stats.head)) { |
duke@1 | 606 | newstats.append(stats.head); |
duke@1 | 607 | stats = stats.tail; |
duke@1 | 608 | } |
duke@1 | 609 | // Now insert the initializer code. |
duke@1 | 610 | newstats.appendList(initCode); |
duke@1 | 611 | // And copy all remaining statements. |
duke@1 | 612 | while (stats.nonEmpty()) { |
duke@1 | 613 | newstats.append(stats.head); |
duke@1 | 614 | stats = stats.tail; |
duke@1 | 615 | } |
duke@1 | 616 | } |
duke@1 | 617 | md.body.stats = newstats.toList(); |
duke@1 | 618 | if (md.body.endpos == Position.NOPOS) |
duke@1 | 619 | md.body.endpos = TreeInfo.endPos(md.body.stats.last()); |
jjg@1755 | 620 | |
jjg@1802 | 621 | md.sym.appendUniqueTypeAttributes(initTAs); |
duke@1 | 622 | } |
duke@1 | 623 | } |
duke@1 | 624 | |
duke@1 | 625 | /* ******************************************************************** |
duke@1 | 626 | * Adding miranda methods |
duke@1 | 627 | *********************************************************************/ |
duke@1 | 628 | |
duke@1 | 629 | /** Add abstract methods for all methods defined in one of |
duke@1 | 630 | * the interfaces of a given class, |
duke@1 | 631 | * provided they are not already implemented in the class. |
duke@1 | 632 | * |
duke@1 | 633 | * @param c The class whose interfaces are searched for methods |
duke@1 | 634 | * for which Miranda methods should be added. |
duke@1 | 635 | */ |
duke@1 | 636 | void implementInterfaceMethods(ClassSymbol c) { |
duke@1 | 637 | implementInterfaceMethods(c, c); |
duke@1 | 638 | } |
duke@1 | 639 | |
duke@1 | 640 | /** Add abstract methods for all methods defined in one of |
duke@1 | 641 | * the interfaces of a given class, |
duke@1 | 642 | * provided they are not already implemented in the class. |
duke@1 | 643 | * |
duke@1 | 644 | * @param c The class whose interfaces are searched for methods |
duke@1 | 645 | * for which Miranda methods should be added. |
duke@1 | 646 | * @param site The class in which a definition may be needed. |
duke@1 | 647 | */ |
duke@1 | 648 | void implementInterfaceMethods(ClassSymbol c, ClassSymbol site) { |
duke@1 | 649 | for (List<Type> l = types.interfaces(c.type); l.nonEmpty(); l = l.tail) { |
duke@1 | 650 | ClassSymbol i = (ClassSymbol)l.head.tsym; |
duke@1 | 651 | for (Scope.Entry e = i.members().elems; |
duke@1 | 652 | e != null; |
duke@1 | 653 | e = e.sibling) |
duke@1 | 654 | { |
duke@1 | 655 | if (e.sym.kind == MTH && (e.sym.flags() & STATIC) == 0) |
duke@1 | 656 | { |
duke@1 | 657 | MethodSymbol absMeth = (MethodSymbol)e.sym; |
duke@1 | 658 | MethodSymbol implMeth = absMeth.binaryImplementation(site, types); |
duke@1 | 659 | if (implMeth == null) |
duke@1 | 660 | addAbstractMethod(site, absMeth); |
duke@1 | 661 | else if ((implMeth.flags() & IPROXY) != 0) |
duke@1 | 662 | adjustAbstractMethod(site, implMeth, absMeth); |
duke@1 | 663 | } |
duke@1 | 664 | } |
duke@1 | 665 | implementInterfaceMethods(i, site); |
duke@1 | 666 | } |
duke@1 | 667 | } |
duke@1 | 668 | |
duke@1 | 669 | /** Add an abstract methods to a class |
duke@1 | 670 | * which implicitly implements a method defined in some interface |
duke@1 | 671 | * implemented by the class. These methods are called "Miranda methods". |
duke@1 | 672 | * Enter the newly created method into its enclosing class scope. |
duke@1 | 673 | * Note that it is not entered into the class tree, as the emitter |
duke@1 | 674 | * doesn't need to see it there to emit an abstract method. |
duke@1 | 675 | * |
duke@1 | 676 | * @param c The class to which the Miranda method is added. |
duke@1 | 677 | * @param m The interface method symbol for which a Miranda method |
duke@1 | 678 | * is added. |
duke@1 | 679 | */ |
duke@1 | 680 | private void addAbstractMethod(ClassSymbol c, |
duke@1 | 681 | MethodSymbol m) { |
duke@1 | 682 | MethodSymbol absMeth = new MethodSymbol( |
duke@1 | 683 | m.flags() | IPROXY | SYNTHETIC, m.name, |
duke@1 | 684 | m.type, // was c.type.memberType(m), but now only !generics supported |
duke@1 | 685 | c); |
duke@1 | 686 | c.members().enter(absMeth); // add to symbol table |
duke@1 | 687 | } |
duke@1 | 688 | |
duke@1 | 689 | private void adjustAbstractMethod(ClassSymbol c, |
duke@1 | 690 | MethodSymbol pm, |
duke@1 | 691 | MethodSymbol im) { |
duke@1 | 692 | MethodType pmt = (MethodType)pm.type; |
duke@1 | 693 | Type imt = types.memberType(c.type, im); |
duke@1 | 694 | pmt.thrown = chk.intersect(pmt.getThrownTypes(), imt.getThrownTypes()); |
duke@1 | 695 | } |
duke@1 | 696 | |
duke@1 | 697 | /* ************************************************************************ |
duke@1 | 698 | * Traversal methods |
duke@1 | 699 | *************************************************************************/ |
duke@1 | 700 | |
duke@1 | 701 | /** Visitor argument: The current environment. |
duke@1 | 702 | */ |
duke@1 | 703 | Env<GenContext> env; |
duke@1 | 704 | |
duke@1 | 705 | /** Visitor argument: The expected type (prototype). |
duke@1 | 706 | */ |
duke@1 | 707 | Type pt; |
duke@1 | 708 | |
duke@1 | 709 | /** Visitor result: The item representing the computed value. |
duke@1 | 710 | */ |
duke@1 | 711 | Item result; |
duke@1 | 712 | |
duke@1 | 713 | /** Visitor method: generate code for a definition, catching and reporting |
duke@1 | 714 | * any completion failures. |
duke@1 | 715 | * @param tree The definition to be visited. |
duke@1 | 716 | * @param env The environment current at the definition. |
duke@1 | 717 | */ |
duke@1 | 718 | public void genDef(JCTree tree, Env<GenContext> env) { |
duke@1 | 719 | Env<GenContext> prevEnv = this.env; |
duke@1 | 720 | try { |
duke@1 | 721 | this.env = env; |
duke@1 | 722 | tree.accept(this); |
duke@1 | 723 | } catch (CompletionFailure ex) { |
duke@1 | 724 | chk.completionError(tree.pos(), ex); |
duke@1 | 725 | } finally { |
duke@1 | 726 | this.env = prevEnv; |
duke@1 | 727 | } |
duke@1 | 728 | } |
duke@1 | 729 | |
duke@1 | 730 | /** Derived visitor method: check whether CharacterRangeTable |
duke@1 | 731 | * should be emitted, if so, put a new entry into CRTable |
duke@1 | 732 | * and call method to generate bytecode. |
duke@1 | 733 | * If not, just call method to generate bytecode. |
jjg@1358 | 734 | * @see #genStat(JCTree, Env) |
duke@1 | 735 | * |
duke@1 | 736 | * @param tree The tree to be visited. |
duke@1 | 737 | * @param env The environment to use. |
duke@1 | 738 | * @param crtFlags The CharacterRangeTable flags |
duke@1 | 739 | * indicating type of the entry. |
duke@1 | 740 | */ |
duke@1 | 741 | public void genStat(JCTree tree, Env<GenContext> env, int crtFlags) { |
duke@1 | 742 | if (!genCrt) { |
duke@1 | 743 | genStat(tree, env); |
duke@1 | 744 | return; |
duke@1 | 745 | } |
duke@1 | 746 | int startpc = code.curPc(); |
duke@1 | 747 | genStat(tree, env); |
vromero@1452 | 748 | if (tree.hasTag(Tag.BLOCK)) crtFlags |= CRT_BLOCK; |
duke@1 | 749 | code.crt.put(tree, crtFlags, startpc, code.curPc()); |
duke@1 | 750 | } |
duke@1 | 751 | |
duke@1 | 752 | /** Derived visitor method: generate code for a statement. |
duke@1 | 753 | */ |
duke@1 | 754 | public void genStat(JCTree tree, Env<GenContext> env) { |
duke@1 | 755 | if (code.isAlive()) { |
duke@1 | 756 | code.statBegin(tree.pos); |
duke@1 | 757 | genDef(tree, env); |
jjg@1127 | 758 | } else if (env.info.isSwitch && tree.hasTag(VARDEF)) { |
duke@1 | 759 | // variables whose declarations are in a switch |
duke@1 | 760 | // can be used even if the decl is unreachable. |
duke@1 | 761 | code.newLocal(((JCVariableDecl) tree).sym); |
duke@1 | 762 | } |
duke@1 | 763 | } |
duke@1 | 764 | |
duke@1 | 765 | /** Derived visitor method: check whether CharacterRangeTable |
duke@1 | 766 | * should be emitted, if so, put a new entry into CRTable |
duke@1 | 767 | * and call method to generate bytecode. |
duke@1 | 768 | * If not, just call method to generate bytecode. |
duke@1 | 769 | * @see #genStats(List, Env) |
duke@1 | 770 | * |
duke@1 | 771 | * @param trees The list of trees to be visited. |
duke@1 | 772 | * @param env The environment to use. |
duke@1 | 773 | * @param crtFlags The CharacterRangeTable flags |
duke@1 | 774 | * indicating type of the entry. |
duke@1 | 775 | */ |
duke@1 | 776 | public void genStats(List<JCStatement> trees, Env<GenContext> env, int crtFlags) { |
duke@1 | 777 | if (!genCrt) { |
duke@1 | 778 | genStats(trees, env); |
duke@1 | 779 | return; |
duke@1 | 780 | } |
duke@1 | 781 | if (trees.length() == 1) { // mark one statement with the flags |
duke@1 | 782 | genStat(trees.head, env, crtFlags | CRT_STATEMENT); |
duke@1 | 783 | } else { |
duke@1 | 784 | int startpc = code.curPc(); |
duke@1 | 785 | genStats(trees, env); |
duke@1 | 786 | code.crt.put(trees, crtFlags, startpc, code.curPc()); |
duke@1 | 787 | } |
duke@1 | 788 | } |
duke@1 | 789 | |
duke@1 | 790 | /** Derived visitor method: generate code for a list of statements. |
duke@1 | 791 | */ |
duke@1 | 792 | public void genStats(List<? extends JCTree> trees, Env<GenContext> env) { |
duke@1 | 793 | for (List<? extends JCTree> l = trees; l.nonEmpty(); l = l.tail) |
duke@1 | 794 | genStat(l.head, env, CRT_STATEMENT); |
duke@1 | 795 | } |
duke@1 | 796 | |
duke@1 | 797 | /** Derived visitor method: check whether CharacterRangeTable |
duke@1 | 798 | * should be emitted, if so, put a new entry into CRTable |
duke@1 | 799 | * and call method to generate bytecode. |
duke@1 | 800 | * If not, just call method to generate bytecode. |
jjg@1358 | 801 | * @see #genCond(JCTree,boolean) |
duke@1 | 802 | * |
duke@1 | 803 | * @param tree The tree to be visited. |
duke@1 | 804 | * @param crtFlags The CharacterRangeTable flags |
duke@1 | 805 | * indicating type of the entry. |
duke@1 | 806 | */ |
duke@1 | 807 | public CondItem genCond(JCTree tree, int crtFlags) { |
duke@1 | 808 | if (!genCrt) return genCond(tree, false); |
duke@1 | 809 | int startpc = code.curPc(); |
duke@1 | 810 | CondItem item = genCond(tree, (crtFlags & CRT_FLOW_CONTROLLER) != 0); |
duke@1 | 811 | code.crt.put(tree, crtFlags, startpc, code.curPc()); |
duke@1 | 812 | return item; |
duke@1 | 813 | } |
duke@1 | 814 | |
duke@1 | 815 | /** Derived visitor method: generate code for a boolean |
duke@1 | 816 | * expression in a control-flow context. |
duke@1 | 817 | * @param _tree The expression to be visited. |
duke@1 | 818 | * @param markBranches The flag to indicate that the condition is |
duke@1 | 819 | * a flow controller so produced conditions |
duke@1 | 820 | * should contain a proper tree to generate |
duke@1 | 821 | * CharacterRangeTable branches for them. |
duke@1 | 822 | */ |
duke@1 | 823 | public CondItem genCond(JCTree _tree, boolean markBranches) { |
duke@1 | 824 | JCTree inner_tree = TreeInfo.skipParens(_tree); |
jjg@1127 | 825 | if (inner_tree.hasTag(CONDEXPR)) { |
duke@1 | 826 | JCConditional tree = (JCConditional)inner_tree; |
duke@1 | 827 | CondItem cond = genCond(tree.cond, CRT_FLOW_CONTROLLER); |
duke@1 | 828 | if (cond.isTrue()) { |
duke@1 | 829 | code.resolve(cond.trueJumps); |
duke@1 | 830 | CondItem result = genCond(tree.truepart, CRT_FLOW_TARGET); |
duke@1 | 831 | if (markBranches) result.tree = tree.truepart; |
duke@1 | 832 | return result; |
duke@1 | 833 | } |
duke@1 | 834 | if (cond.isFalse()) { |
duke@1 | 835 | code.resolve(cond.falseJumps); |
duke@1 | 836 | CondItem result = genCond(tree.falsepart, CRT_FLOW_TARGET); |
duke@1 | 837 | if (markBranches) result.tree = tree.falsepart; |
duke@1 | 838 | return result; |
duke@1 | 839 | } |
duke@1 | 840 | Chain secondJumps = cond.jumpFalse(); |
duke@1 | 841 | code.resolve(cond.trueJumps); |
duke@1 | 842 | CondItem first = genCond(tree.truepart, CRT_FLOW_TARGET); |
duke@1 | 843 | if (markBranches) first.tree = tree.truepart; |
duke@1 | 844 | Chain falseJumps = first.jumpFalse(); |
duke@1 | 845 | code.resolve(first.trueJumps); |
duke@1 | 846 | Chain trueJumps = code.branch(goto_); |
duke@1 | 847 | code.resolve(secondJumps); |
duke@1 | 848 | CondItem second = genCond(tree.falsepart, CRT_FLOW_TARGET); |
duke@1 | 849 | CondItem result = items.makeCondItem(second.opcode, |
jjg@507 | 850 | Code.mergeChains(trueJumps, second.trueJumps), |
jjg@507 | 851 | Code.mergeChains(falseJumps, second.falseJumps)); |
duke@1 | 852 | if (markBranches) result.tree = tree.falsepart; |
duke@1 | 853 | return result; |
duke@1 | 854 | } else { |
duke@1 | 855 | CondItem result = genExpr(_tree, syms.booleanType).mkCond(); |
duke@1 | 856 | if (markBranches) result.tree = _tree; |
duke@1 | 857 | return result; |
duke@1 | 858 | } |
duke@1 | 859 | } |
duke@1 | 860 | |
vromero@1432 | 861 | /** Visitor class for expressions which might be constant expressions. |
vromero@1432 | 862 | * This class is a subset of TreeScanner. Intended to visit trees pruned by |
vromero@1432 | 863 | * Lower as long as constant expressions looking for references to any |
vromero@1432 | 864 | * ClassSymbol. Any such reference will be added to the constant pool so |
vromero@1432 | 865 | * automated tools can detect class dependencies better. |
vromero@1432 | 866 | */ |
vromero@1432 | 867 | class ClassReferenceVisitor extends JCTree.Visitor { |
vromero@1432 | 868 | |
vromero@1432 | 869 | @Override |
vromero@1432 | 870 | public void visitTree(JCTree tree) {} |
vromero@1432 | 871 | |
vromero@1432 | 872 | @Override |
vromero@1432 | 873 | public void visitBinary(JCBinary tree) { |
vromero@1432 | 874 | tree.lhs.accept(this); |
vromero@1432 | 875 | tree.rhs.accept(this); |
vromero@1432 | 876 | } |
vromero@1432 | 877 | |
vromero@1432 | 878 | @Override |
vromero@1432 | 879 | public void visitSelect(JCFieldAccess tree) { |
vromero@1432 | 880 | if (tree.selected.type.hasTag(CLASS)) { |
vromero@1432 | 881 | makeRef(tree.selected.pos(), tree.selected.type); |
vromero@1432 | 882 | } |
vromero@1432 | 883 | } |
vromero@1432 | 884 | |
vromero@1432 | 885 | @Override |
vromero@1432 | 886 | public void visitIdent(JCIdent tree) { |
vromero@1432 | 887 | if (tree.sym.owner instanceof ClassSymbol) { |
vromero@1432 | 888 | pool.put(tree.sym.owner); |
vromero@1432 | 889 | } |
vromero@1432 | 890 | } |
vromero@1432 | 891 | |
vromero@1432 | 892 | @Override |
vromero@1432 | 893 | public void visitConditional(JCConditional tree) { |
vromero@1432 | 894 | tree.cond.accept(this); |
vromero@1432 | 895 | tree.truepart.accept(this); |
vromero@1432 | 896 | tree.falsepart.accept(this); |
vromero@1432 | 897 | } |
vromero@1432 | 898 | |
vromero@1432 | 899 | @Override |
vromero@1432 | 900 | public void visitUnary(JCUnary tree) { |
vromero@1432 | 901 | tree.arg.accept(this); |
vromero@1432 | 902 | } |
vromero@1432 | 903 | |
vromero@1432 | 904 | @Override |
vromero@1432 | 905 | public void visitParens(JCParens tree) { |
vromero@1432 | 906 | tree.expr.accept(this); |
vromero@1432 | 907 | } |
vromero@1432 | 908 | |
vromero@1432 | 909 | @Override |
vromero@1432 | 910 | public void visitTypeCast(JCTypeCast tree) { |
vromero@1432 | 911 | tree.expr.accept(this); |
vromero@1432 | 912 | } |
vromero@1432 | 913 | } |
vromero@1432 | 914 | |
vromero@1432 | 915 | private ClassReferenceVisitor classReferenceVisitor = new ClassReferenceVisitor(); |
vromero@1432 | 916 | |
duke@1 | 917 | /** Visitor method: generate code for an expression, catching and reporting |
duke@1 | 918 | * any completion failures. |
duke@1 | 919 | * @param tree The expression to be visited. |
duke@1 | 920 | * @param pt The expression's expected type (proto-type). |
duke@1 | 921 | */ |
duke@1 | 922 | public Item genExpr(JCTree tree, Type pt) { |
duke@1 | 923 | Type prevPt = this.pt; |
duke@1 | 924 | try { |
duke@1 | 925 | if (tree.type.constValue() != null) { |
duke@1 | 926 | // Short circuit any expressions which are constants |
vromero@1432 | 927 | tree.accept(classReferenceVisitor); |
duke@1 | 928 | checkStringConstant(tree.pos(), tree.type.constValue()); |
duke@1 | 929 | result = items.makeImmediateItem(tree.type, tree.type.constValue()); |
duke@1 | 930 | } else { |
duke@1 | 931 | this.pt = pt; |
duke@1 | 932 | tree.accept(this); |
duke@1 | 933 | } |
duke@1 | 934 | return result.coerce(pt); |
duke@1 | 935 | } catch (CompletionFailure ex) { |
duke@1 | 936 | chk.completionError(tree.pos(), ex); |
duke@1 | 937 | code.state.stacksize = 1; |
duke@1 | 938 | return items.makeStackItem(pt); |
duke@1 | 939 | } finally { |
duke@1 | 940 | this.pt = prevPt; |
duke@1 | 941 | } |
duke@1 | 942 | } |
duke@1 | 943 | |
duke@1 | 944 | /** Derived visitor method: generate code for a list of method arguments. |
duke@1 | 945 | * @param trees The argument expressions to be visited. |
duke@1 | 946 | * @param pts The expression's expected types (i.e. the formal parameter |
duke@1 | 947 | * types of the invoked method). |
duke@1 | 948 | */ |
duke@1 | 949 | public void genArgs(List<JCExpression> trees, List<Type> pts) { |
duke@1 | 950 | for (List<JCExpression> l = trees; l.nonEmpty(); l = l.tail) { |
duke@1 | 951 | genExpr(l.head, pts.head).load(); |
duke@1 | 952 | pts = pts.tail; |
duke@1 | 953 | } |
duke@1 | 954 | // require lists be of same length |
jjg@816 | 955 | Assert.check(pts.isEmpty()); |
duke@1 | 956 | } |
duke@1 | 957 | |
duke@1 | 958 | /* ************************************************************************ |
duke@1 | 959 | * Visitor methods for statements and definitions |
duke@1 | 960 | *************************************************************************/ |
duke@1 | 961 | |
duke@1 | 962 | /** Thrown when the byte code size exceeds limit. |
duke@1 | 963 | */ |
duke@1 | 964 | public static class CodeSizeOverflow extends RuntimeException { |
duke@1 | 965 | private static final long serialVersionUID = 0; |
duke@1 | 966 | public CodeSizeOverflow() {} |
duke@1 | 967 | } |
duke@1 | 968 | |
duke@1 | 969 | public void visitMethodDef(JCMethodDecl tree) { |
duke@1 | 970 | // Create a new local environment that points pack at method |
duke@1 | 971 | // definition. |
duke@1 | 972 | Env<GenContext> localEnv = env.dup(tree); |
duke@1 | 973 | localEnv.enclMethod = tree; |
duke@1 | 974 | |
duke@1 | 975 | // The expected type of every return statement in this method |
duke@1 | 976 | // is the method's return type. |
duke@1 | 977 | this.pt = tree.sym.erasure(types).getReturnType(); |
duke@1 | 978 | |
duke@1 | 979 | checkDimension(tree.pos(), tree.sym.erasure(types)); |
duke@1 | 980 | genMethod(tree, localEnv, false); |
duke@1 | 981 | } |
duke@1 | 982 | //where |
duke@1 | 983 | /** Generate code for a method. |
duke@1 | 984 | * @param tree The tree representing the method definition. |
duke@1 | 985 | * @param env The environment current for the method body. |
duke@1 | 986 | * @param fatcode A flag that indicates whether all jumps are |
duke@1 | 987 | * within 32K. We first invoke this method under |
duke@1 | 988 | * the assumption that fatcode == false, i.e. all |
duke@1 | 989 | * jumps are within 32K. If this fails, fatcode |
duke@1 | 990 | * is set to true and we try again. |
duke@1 | 991 | */ |
duke@1 | 992 | void genMethod(JCMethodDecl tree, Env<GenContext> env, boolean fatcode) { |
duke@1 | 993 | MethodSymbol meth = tree.sym; |
emc@1860 | 994 | int extras = 0; |
emc@1860 | 995 | // Count up extra parameters |
emc@1860 | 996 | if (meth.isConstructor()) { |
emc@1860 | 997 | extras++; |
emc@1860 | 998 | if (meth.enclClass().isInner() && |
emc@1860 | 999 | !meth.enclClass().isStatic()) { |
emc@1860 | 1000 | extras++; |
emc@1860 | 1001 | } |
emc@1860 | 1002 | } else if ((tree.mods.flags & STATIC) == 0) { |
emc@1860 | 1003 | extras++; |
emc@1860 | 1004 | } |
emc@1860 | 1005 | // System.err.println("Generating " + meth + " in " + meth.owner); //DEBUG |
emc@1860 | 1006 | if (Code.width(types.erasure(env.enclMethod.sym.type).getParameterTypes()) + extras > |
duke@1 | 1007 | ClassFile.MAX_PARAMETERS) { |
duke@1 | 1008 | log.error(tree.pos(), "limit.parameters"); |
duke@1 | 1009 | nerrs++; |
duke@1 | 1010 | } |
duke@1 | 1011 | |
duke@1 | 1012 | else if (tree.body != null) { |
duke@1 | 1013 | // Create a new code structure and initialize it. |
duke@1 | 1014 | int startpcCrt = initCode(tree, env, fatcode); |
duke@1 | 1015 | |
duke@1 | 1016 | try { |
duke@1 | 1017 | genStat(tree.body, env); |
duke@1 | 1018 | } catch (CodeSizeOverflow e) { |
duke@1 | 1019 | // Failed due to code limit, try again with jsr/ret |
duke@1 | 1020 | startpcCrt = initCode(tree, env, fatcode); |
duke@1 | 1021 | genStat(tree.body, env); |
duke@1 | 1022 | } |
duke@1 | 1023 | |
duke@1 | 1024 | if (code.state.stacksize != 0) { |
duke@1 | 1025 | log.error(tree.body.pos(), "stack.sim.error", tree); |
duke@1 | 1026 | throw new AssertionError(); |
duke@1 | 1027 | } |
duke@1 | 1028 | |
duke@1 | 1029 | // If last statement could complete normally, insert a |
duke@1 | 1030 | // return at the end. |
duke@1 | 1031 | if (code.isAlive()) { |
duke@1 | 1032 | code.statBegin(TreeInfo.endPos(tree.body)); |
duke@1 | 1033 | if (env.enclMethod == null || |
jjg@1374 | 1034 | env.enclMethod.sym.type.getReturnType().hasTag(VOID)) { |
duke@1 | 1035 | code.emitop0(return_); |
duke@1 | 1036 | } else { |
duke@1 | 1037 | // sometime dead code seems alive (4415991); |
duke@1 | 1038 | // generate a small loop instead |
duke@1 | 1039 | int startpc = code.entryPoint(); |
duke@1 | 1040 | CondItem c = items.makeCondItem(goto_); |
duke@1 | 1041 | code.resolve(c.jumpTrue(), startpc); |
duke@1 | 1042 | } |
duke@1 | 1043 | } |
duke@1 | 1044 | if (genCrt) |
duke@1 | 1045 | code.crt.put(tree.body, |
duke@1 | 1046 | CRT_BLOCK, |
duke@1 | 1047 | startpcCrt, |
duke@1 | 1048 | code.curPc()); |
duke@1 | 1049 | |
duke@1 | 1050 | code.endScopes(0); |
duke@1 | 1051 | |
duke@1 | 1052 | // If we exceeded limits, panic |
duke@1 | 1053 | if (code.checkLimits(tree.pos(), log)) { |
duke@1 | 1054 | nerrs++; |
duke@1 | 1055 | return; |
duke@1 | 1056 | } |
duke@1 | 1057 | |
duke@1 | 1058 | // If we generated short code but got a long jump, do it again |
duke@1 | 1059 | // with fatCode = true. |
duke@1 | 1060 | if (!fatcode && code.fatcode) genMethod(tree, env, true); |
duke@1 | 1061 | |
duke@1 | 1062 | // Clean up |
duke@1 | 1063 | if(stackMap == StackMapFormat.JSR202) { |
duke@1 | 1064 | code.lastFrame = null; |
duke@1 | 1065 | code.frameBeforeLast = null; |
duke@1 | 1066 | } |
mcimadamore@1109 | 1067 | |
jjg@1521 | 1068 | // Compress exception table |
mcimadamore@1109 | 1069 | code.compressCatchTable(); |
jjg@1521 | 1070 | |
jjg@1521 | 1071 | // Fill in type annotation positions for exception parameters |
jjg@1521 | 1072 | code.fillExceptionParameterPositions(); |
duke@1 | 1073 | } |
duke@1 | 1074 | } |
duke@1 | 1075 | |
duke@1 | 1076 | private int initCode(JCMethodDecl tree, Env<GenContext> env, boolean fatcode) { |
duke@1 | 1077 | MethodSymbol meth = tree.sym; |
duke@1 | 1078 | |
duke@1 | 1079 | // Create a new code structure. |
duke@1 | 1080 | meth.code = code = new Code(meth, |
duke@1 | 1081 | fatcode, |
duke@1 | 1082 | lineDebugInfo ? toplevel.lineMap : null, |
duke@1 | 1083 | varDebugInfo, |
duke@1 | 1084 | stackMap, |
duke@1 | 1085 | debugCode, |
duke@1 | 1086 | genCrt ? new CRTable(tree, env.toplevel.endPositions) |
duke@1 | 1087 | : null, |
duke@1 | 1088 | syms, |
duke@1 | 1089 | types, |
duke@1 | 1090 | pool); |
duke@1 | 1091 | items = new Items(pool, code, syms, types); |
duke@1 | 1092 | if (code.debugCode) |
duke@1 | 1093 | System.err.println(meth + " for body " + tree); |
duke@1 | 1094 | |
duke@1 | 1095 | // If method is not static, create a new local variable address |
duke@1 | 1096 | // for `this'. |
duke@1 | 1097 | if ((tree.mods.flags & STATIC) == 0) { |
duke@1 | 1098 | Type selfType = meth.owner.type; |
duke@1 | 1099 | if (meth.isConstructor() && selfType != syms.objectType) |
duke@1 | 1100 | selfType = UninitializedType.uninitializedThis(selfType); |
duke@1 | 1101 | code.setDefined( |
duke@1 | 1102 | code.newLocal( |
duke@1 | 1103 | new VarSymbol(FINAL, names._this, selfType, meth.owner))); |
duke@1 | 1104 | } |
duke@1 | 1105 | |
duke@1 | 1106 | // Mark all parameters as defined from the beginning of |
duke@1 | 1107 | // the method. |
duke@1 | 1108 | for (List<JCVariableDecl> l = tree.params; l.nonEmpty(); l = l.tail) { |
duke@1 | 1109 | checkDimension(l.head.pos(), l.head.sym.type); |
duke@1 | 1110 | code.setDefined(code.newLocal(l.head.sym)); |
duke@1 | 1111 | } |
duke@1 | 1112 | |
duke@1 | 1113 | // Get ready to generate code for method body. |
duke@1 | 1114 | int startpcCrt = genCrt ? code.curPc() : 0; |
duke@1 | 1115 | code.entryPoint(); |
duke@1 | 1116 | |
duke@1 | 1117 | // Suppress initial stackmap |
duke@1 | 1118 | code.pendingStackMap = false; |
duke@1 | 1119 | |
duke@1 | 1120 | return startpcCrt; |
duke@1 | 1121 | } |
duke@1 | 1122 | |
duke@1 | 1123 | public void visitVarDef(JCVariableDecl tree) { |
duke@1 | 1124 | VarSymbol v = tree.sym; |
duke@1 | 1125 | code.newLocal(v); |
duke@1 | 1126 | if (tree.init != null) { |
duke@1 | 1127 | checkStringConstant(tree.init.pos(), v.getConstValue()); |
duke@1 | 1128 | if (v.getConstValue() == null || varDebugInfo) { |
duke@1 | 1129 | genExpr(tree.init, v.erasure(types)).load(); |
duke@1 | 1130 | items.makeLocalItem(v).store(); |
duke@1 | 1131 | } |
duke@1 | 1132 | } |
duke@1 | 1133 | checkDimension(tree.pos(), v.type); |
duke@1 | 1134 | } |
duke@1 | 1135 | |
duke@1 | 1136 | public void visitSkip(JCSkip tree) { |
duke@1 | 1137 | } |
duke@1 | 1138 | |
duke@1 | 1139 | public void visitBlock(JCBlock tree) { |
duke@1 | 1140 | int limit = code.nextreg; |
duke@1 | 1141 | Env<GenContext> localEnv = env.dup(tree, new GenContext()); |
duke@1 | 1142 | genStats(tree.stats, localEnv); |
duke@1 | 1143 | // End the scope of all block-local variables in variable info. |
jjg@1127 | 1144 | if (!env.tree.hasTag(METHODDEF)) { |
duke@1 | 1145 | code.statBegin(tree.endpos); |
duke@1 | 1146 | code.endScopes(limit); |
duke@1 | 1147 | code.pendingStatPos = Position.NOPOS; |
duke@1 | 1148 | } |
duke@1 | 1149 | } |
duke@1 | 1150 | |
duke@1 | 1151 | public void visitDoLoop(JCDoWhileLoop tree) { |
duke@1 | 1152 | genLoop(tree, tree.body, tree.cond, List.<JCExpressionStatement>nil(), false); |
duke@1 | 1153 | } |
duke@1 | 1154 | |
duke@1 | 1155 | public void visitWhileLoop(JCWhileLoop tree) { |
duke@1 | 1156 | genLoop(tree, tree.body, tree.cond, List.<JCExpressionStatement>nil(), true); |
duke@1 | 1157 | } |
duke@1 | 1158 | |
duke@1 | 1159 | public void visitForLoop(JCForLoop tree) { |
duke@1 | 1160 | int limit = code.nextreg; |
duke@1 | 1161 | genStats(tree.init, env); |
duke@1 | 1162 | genLoop(tree, tree.body, tree.cond, tree.step, true); |
duke@1 | 1163 | code.endScopes(limit); |
duke@1 | 1164 | } |
duke@1 | 1165 | //where |
duke@1 | 1166 | /** Generate code for a loop. |
duke@1 | 1167 | * @param loop The tree representing the loop. |
duke@1 | 1168 | * @param body The loop's body. |
duke@1 | 1169 | * @param cond The loop's controling condition. |
duke@1 | 1170 | * @param step "Step" statements to be inserted at end of |
duke@1 | 1171 | * each iteration. |
duke@1 | 1172 | * @param testFirst True if the loop test belongs before the body. |
duke@1 | 1173 | */ |
duke@1 | 1174 | private void genLoop(JCStatement loop, |
duke@1 | 1175 | JCStatement body, |
duke@1 | 1176 | JCExpression cond, |
duke@1 | 1177 | List<JCExpressionStatement> step, |
duke@1 | 1178 | boolean testFirst) { |
duke@1 | 1179 | Env<GenContext> loopEnv = env.dup(loop, new GenContext()); |
duke@1 | 1180 | int startpc = code.entryPoint(); |
duke@1 | 1181 | if (testFirst) { |
duke@1 | 1182 | CondItem c; |
duke@1 | 1183 | if (cond != null) { |
duke@1 | 1184 | code.statBegin(cond.pos); |
duke@1 | 1185 | c = genCond(TreeInfo.skipParens(cond), CRT_FLOW_CONTROLLER); |
duke@1 | 1186 | } else { |
duke@1 | 1187 | c = items.makeCondItem(goto_); |
duke@1 | 1188 | } |
duke@1 | 1189 | Chain loopDone = c.jumpFalse(); |
duke@1 | 1190 | code.resolve(c.trueJumps); |
duke@1 | 1191 | genStat(body, loopEnv, CRT_STATEMENT | CRT_FLOW_TARGET); |
duke@1 | 1192 | code.resolve(loopEnv.info.cont); |
duke@1 | 1193 | genStats(step, loopEnv); |
duke@1 | 1194 | code.resolve(code.branch(goto_), startpc); |
duke@1 | 1195 | code.resolve(loopDone); |
duke@1 | 1196 | } else { |
duke@1 | 1197 | genStat(body, loopEnv, CRT_STATEMENT | CRT_FLOW_TARGET); |
duke@1 | 1198 | code.resolve(loopEnv.info.cont); |
duke@1 | 1199 | genStats(step, loopEnv); |
duke@1 | 1200 | CondItem c; |
duke@1 | 1201 | if (cond != null) { |
duke@1 | 1202 | code.statBegin(cond.pos); |
duke@1 | 1203 | c = genCond(TreeInfo.skipParens(cond), CRT_FLOW_CONTROLLER); |
duke@1 | 1204 | } else { |
duke@1 | 1205 | c = items.makeCondItem(goto_); |
duke@1 | 1206 | } |
duke@1 | 1207 | code.resolve(c.jumpTrue(), startpc); |
duke@1 | 1208 | code.resolve(c.falseJumps); |
duke@1 | 1209 | } |
duke@1 | 1210 | code.resolve(loopEnv.info.exit); |
duke@1 | 1211 | } |
duke@1 | 1212 | |
duke@1 | 1213 | public void visitForeachLoop(JCEnhancedForLoop tree) { |
duke@1 | 1214 | throw new AssertionError(); // should have been removed by Lower. |
duke@1 | 1215 | } |
duke@1 | 1216 | |
duke@1 | 1217 | public void visitLabelled(JCLabeledStatement tree) { |
duke@1 | 1218 | Env<GenContext> localEnv = env.dup(tree, new GenContext()); |
duke@1 | 1219 | genStat(tree.body, localEnv, CRT_STATEMENT); |
duke@1 | 1220 | code.resolve(localEnv.info.exit); |
duke@1 | 1221 | } |
duke@1 | 1222 | |
duke@1 | 1223 | public void visitSwitch(JCSwitch tree) { |
duke@1 | 1224 | int limit = code.nextreg; |
jjg@1374 | 1225 | Assert.check(!tree.selector.type.hasTag(CLASS)); |
duke@1 | 1226 | int startpcCrt = genCrt ? code.curPc() : 0; |
duke@1 | 1227 | Item sel = genExpr(tree.selector, syms.intType); |
duke@1 | 1228 | List<JCCase> cases = tree.cases; |
duke@1 | 1229 | if (cases.isEmpty()) { |
duke@1 | 1230 | // We are seeing: switch <sel> {} |
duke@1 | 1231 | sel.load().drop(); |
duke@1 | 1232 | if (genCrt) |
duke@1 | 1233 | code.crt.put(TreeInfo.skipParens(tree.selector), |
duke@1 | 1234 | CRT_FLOW_CONTROLLER, startpcCrt, code.curPc()); |
duke@1 | 1235 | } else { |
duke@1 | 1236 | // We are seeing a nonempty switch. |
duke@1 | 1237 | sel.load(); |
duke@1 | 1238 | if (genCrt) |
duke@1 | 1239 | code.crt.put(TreeInfo.skipParens(tree.selector), |
duke@1 | 1240 | CRT_FLOW_CONTROLLER, startpcCrt, code.curPc()); |
duke@1 | 1241 | Env<GenContext> switchEnv = env.dup(tree, new GenContext()); |
duke@1 | 1242 | switchEnv.info.isSwitch = true; |
duke@1 | 1243 | |
duke@1 | 1244 | // Compute number of labels and minimum and maximum label values. |
duke@1 | 1245 | // For each case, store its label in an array. |
duke@1 | 1246 | int lo = Integer.MAX_VALUE; // minimum label. |
duke@1 | 1247 | int hi = Integer.MIN_VALUE; // maximum label. |
duke@1 | 1248 | int nlabels = 0; // number of labels. |
duke@1 | 1249 | |
duke@1 | 1250 | int[] labels = new int[cases.length()]; // the label array. |
duke@1 | 1251 | int defaultIndex = -1; // the index of the default clause. |
duke@1 | 1252 | |
duke@1 | 1253 | List<JCCase> l = cases; |
duke@1 | 1254 | for (int i = 0; i < labels.length; i++) { |
duke@1 | 1255 | if (l.head.pat != null) { |
duke@1 | 1256 | int val = ((Number)l.head.pat.type.constValue()).intValue(); |
duke@1 | 1257 | labels[i] = val; |
duke@1 | 1258 | if (val < lo) lo = val; |
duke@1 | 1259 | if (hi < val) hi = val; |
duke@1 | 1260 | nlabels++; |
duke@1 | 1261 | } else { |
jjg@816 | 1262 | Assert.check(defaultIndex == -1); |
duke@1 | 1263 | defaultIndex = i; |
duke@1 | 1264 | } |
duke@1 | 1265 | l = l.tail; |
duke@1 | 1266 | } |
duke@1 | 1267 | |
duke@1 | 1268 | // Determine whether to issue a tableswitch or a lookupswitch |
duke@1 | 1269 | // instruction. |
duke@1 | 1270 | long table_space_cost = 4 + ((long) hi - lo + 1); // words |
duke@1 | 1271 | long table_time_cost = 3; // comparisons |
duke@1 | 1272 | long lookup_space_cost = 3 + 2 * (long) nlabels; |
duke@1 | 1273 | long lookup_time_cost = nlabels; |
duke@1 | 1274 | int opcode = |
duke@1 | 1275 | nlabels > 0 && |
duke@1 | 1276 | table_space_cost + 3 * table_time_cost <= |
duke@1 | 1277 | lookup_space_cost + 3 * lookup_time_cost |
duke@1 | 1278 | ? |
duke@1 | 1279 | tableswitch : lookupswitch; |
duke@1 | 1280 | |
duke@1 | 1281 | int startpc = code.curPc(); // the position of the selector operation |
duke@1 | 1282 | code.emitop0(opcode); |
duke@1 | 1283 | code.align(4); |
duke@1 | 1284 | int tableBase = code.curPc(); // the start of the jump table |
duke@1 | 1285 | int[] offsets = null; // a table of offsets for a lookupswitch |
duke@1 | 1286 | code.emit4(-1); // leave space for default offset |
duke@1 | 1287 | if (opcode == tableswitch) { |
duke@1 | 1288 | code.emit4(lo); // minimum label |
duke@1 | 1289 | code.emit4(hi); // maximum label |
duke@1 | 1290 | for (long i = lo; i <= hi; i++) { // leave space for jump table |
duke@1 | 1291 | code.emit4(-1); |
duke@1 | 1292 | } |
duke@1 | 1293 | } else { |
duke@1 | 1294 | code.emit4(nlabels); // number of labels |
duke@1 | 1295 | for (int i = 0; i < nlabels; i++) { |
duke@1 | 1296 | code.emit4(-1); code.emit4(-1); // leave space for lookup table |
duke@1 | 1297 | } |
duke@1 | 1298 | offsets = new int[labels.length]; |
duke@1 | 1299 | } |
duke@1 | 1300 | Code.State stateSwitch = code.state.dup(); |
duke@1 | 1301 | code.markDead(); |
duke@1 | 1302 | |
duke@1 | 1303 | // For each case do: |
duke@1 | 1304 | l = cases; |
duke@1 | 1305 | for (int i = 0; i < labels.length; i++) { |
duke@1 | 1306 | JCCase c = l.head; |
duke@1 | 1307 | l = l.tail; |
duke@1 | 1308 | |
duke@1 | 1309 | int pc = code.entryPoint(stateSwitch); |
duke@1 | 1310 | // Insert offset directly into code or else into the |
duke@1 | 1311 | // offsets table. |
duke@1 | 1312 | if (i != defaultIndex) { |
duke@1 | 1313 | if (opcode == tableswitch) { |
duke@1 | 1314 | code.put4( |
duke@1 | 1315 | tableBase + 4 * (labels[i] - lo + 3), |
duke@1 | 1316 | pc - startpc); |
duke@1 | 1317 | } else { |
duke@1 | 1318 | offsets[i] = pc - startpc; |
duke@1 | 1319 | } |
duke@1 | 1320 | } else { |
duke@1 | 1321 | code.put4(tableBase, pc - startpc); |
duke@1 | 1322 | } |
duke@1 | 1323 | |
duke@1 | 1324 | // Generate code for the statements in this case. |
duke@1 | 1325 | genStats(c.stats, switchEnv, CRT_FLOW_TARGET); |
duke@1 | 1326 | } |
duke@1 | 1327 | |
duke@1 | 1328 | // Resolve all breaks. |
duke@1 | 1329 | code.resolve(switchEnv.info.exit); |
duke@1 | 1330 | |
duke@1 | 1331 | // If we have not set the default offset, we do so now. |
duke@1 | 1332 | if (code.get4(tableBase) == -1) { |
duke@1 | 1333 | code.put4(tableBase, code.entryPoint(stateSwitch) - startpc); |
duke@1 | 1334 | } |
duke@1 | 1335 | |
duke@1 | 1336 | if (opcode == tableswitch) { |
duke@1 | 1337 | // Let any unfilled slots point to the default case. |
duke@1 | 1338 | int defaultOffset = code.get4(tableBase); |
duke@1 | 1339 | for (long i = lo; i <= hi; i++) { |
duke@1 | 1340 | int t = (int)(tableBase + 4 * (i - lo + 3)); |
duke@1 | 1341 | if (code.get4(t) == -1) |
duke@1 | 1342 | code.put4(t, defaultOffset); |
duke@1 | 1343 | } |
duke@1 | 1344 | } else { |
duke@1 | 1345 | // Sort non-default offsets and copy into lookup table. |
duke@1 | 1346 | if (defaultIndex >= 0) |
duke@1 | 1347 | for (int i = defaultIndex; i < labels.length - 1; i++) { |
duke@1 | 1348 | labels[i] = labels[i+1]; |
duke@1 | 1349 | offsets[i] = offsets[i+1]; |
duke@1 | 1350 | } |
duke@1 | 1351 | if (nlabels > 0) |
duke@1 | 1352 | qsort2(labels, offsets, 0, nlabels - 1); |
duke@1 | 1353 | for (int i = 0; i < nlabels; i++) { |
duke@1 | 1354 | int caseidx = tableBase + 8 * (i + 1); |
duke@1 | 1355 | code.put4(caseidx, labels[i]); |
duke@1 | 1356 | code.put4(caseidx + 4, offsets[i]); |
duke@1 | 1357 | } |
duke@1 | 1358 | } |
duke@1 | 1359 | } |
duke@1 | 1360 | code.endScopes(limit); |
duke@1 | 1361 | } |
duke@1 | 1362 | //where |
duke@1 | 1363 | /** Sort (int) arrays of keys and values |
duke@1 | 1364 | */ |
duke@1 | 1365 | static void qsort2(int[] keys, int[] values, int lo, int hi) { |
duke@1 | 1366 | int i = lo; |
duke@1 | 1367 | int j = hi; |
duke@1 | 1368 | int pivot = keys[(i+j)/2]; |
duke@1 | 1369 | do { |
duke@1 | 1370 | while (keys[i] < pivot) i++; |
duke@1 | 1371 | while (pivot < keys[j]) j--; |
duke@1 | 1372 | if (i <= j) { |
duke@1 | 1373 | int temp1 = keys[i]; |
duke@1 | 1374 | keys[i] = keys[j]; |
duke@1 | 1375 | keys[j] = temp1; |
duke@1 | 1376 | int temp2 = values[i]; |
duke@1 | 1377 | values[i] = values[j]; |
duke@1 | 1378 | values[j] = temp2; |
duke@1 | 1379 | i++; |
duke@1 | 1380 | j--; |
duke@1 | 1381 | } |
duke@1 | 1382 | } while (i <= j); |
duke@1 | 1383 | if (lo < j) qsort2(keys, values, lo, j); |
duke@1 | 1384 | if (i < hi) qsort2(keys, values, i, hi); |
duke@1 | 1385 | } |
duke@1 | 1386 | |
duke@1 | 1387 | public void visitSynchronized(JCSynchronized tree) { |
duke@1 | 1388 | int limit = code.nextreg; |
duke@1 | 1389 | // Generate code to evaluate lock and save in temporary variable. |
duke@1 | 1390 | final LocalItem lockVar = makeTemp(syms.objectType); |
duke@1 | 1391 | genExpr(tree.lock, tree.lock.type).load().duplicate(); |
duke@1 | 1392 | lockVar.store(); |
duke@1 | 1393 | |
duke@1 | 1394 | // Generate code to enter monitor. |
duke@1 | 1395 | code.emitop0(monitorenter); |
duke@1 | 1396 | code.state.lock(lockVar.reg); |
duke@1 | 1397 | |
duke@1 | 1398 | // Generate code for a try statement with given body, no catch clauses |
duke@1 | 1399 | // in a new environment with the "exit-monitor" operation as finalizer. |
duke@1 | 1400 | final Env<GenContext> syncEnv = env.dup(tree, new GenContext()); |
duke@1 | 1401 | syncEnv.info.finalize = new GenFinalizer() { |
duke@1 | 1402 | void gen() { |
duke@1 | 1403 | genLast(); |
jjg@816 | 1404 | Assert.check(syncEnv.info.gaps.length() % 2 == 0); |
duke@1 | 1405 | syncEnv.info.gaps.append(code.curPc()); |
duke@1 | 1406 | } |
duke@1 | 1407 | void genLast() { |
duke@1 | 1408 | if (code.isAlive()) { |
duke@1 | 1409 | lockVar.load(); |
duke@1 | 1410 | code.emitop0(monitorexit); |
duke@1 | 1411 | code.state.unlock(lockVar.reg); |
duke@1 | 1412 | } |
duke@1 | 1413 | } |
duke@1 | 1414 | }; |
duke@1 | 1415 | syncEnv.info.gaps = new ListBuffer<Integer>(); |
duke@1 | 1416 | genTry(tree.body, List.<JCCatch>nil(), syncEnv); |
duke@1 | 1417 | code.endScopes(limit); |
duke@1 | 1418 | } |
duke@1 | 1419 | |
duke@1 | 1420 | public void visitTry(final JCTry tree) { |
duke@1 | 1421 | // Generate code for a try statement with given body and catch clauses, |
duke@1 | 1422 | // in a new environment which calls the finally block if there is one. |
duke@1 | 1423 | final Env<GenContext> tryEnv = env.dup(tree, new GenContext()); |
duke@1 | 1424 | final Env<GenContext> oldEnv = env; |
duke@1 | 1425 | if (!useJsrLocally) { |
duke@1 | 1426 | useJsrLocally = |
duke@1 | 1427 | (stackMap == StackMapFormat.NONE) && |
duke@1 | 1428 | (jsrlimit <= 0 || |
duke@1 | 1429 | jsrlimit < 100 && |
duke@1 | 1430 | estimateCodeComplexity(tree.finalizer)>jsrlimit); |
duke@1 | 1431 | } |
duke@1 | 1432 | tryEnv.info.finalize = new GenFinalizer() { |
duke@1 | 1433 | void gen() { |
duke@1 | 1434 | if (useJsrLocally) { |
duke@1 | 1435 | if (tree.finalizer != null) { |
duke@1 | 1436 | Code.State jsrState = code.state.dup(); |
jjg@507 | 1437 | jsrState.push(Code.jsrReturnValue); |
duke@1 | 1438 | tryEnv.info.cont = |
duke@1 | 1439 | new Chain(code.emitJump(jsr), |
duke@1 | 1440 | tryEnv.info.cont, |
duke@1 | 1441 | jsrState); |
duke@1 | 1442 | } |
jjg@816 | 1443 | Assert.check(tryEnv.info.gaps.length() % 2 == 0); |
duke@1 | 1444 | tryEnv.info.gaps.append(code.curPc()); |
duke@1 | 1445 | } else { |
jjg@816 | 1446 | Assert.check(tryEnv.info.gaps.length() % 2 == 0); |
duke@1 | 1447 | tryEnv.info.gaps.append(code.curPc()); |
duke@1 | 1448 | genLast(); |
duke@1 | 1449 | } |
duke@1 | 1450 | } |
duke@1 | 1451 | void genLast() { |
duke@1 | 1452 | if (tree.finalizer != null) |
duke@1 | 1453 | genStat(tree.finalizer, oldEnv, CRT_BLOCK); |
duke@1 | 1454 | } |
duke@1 | 1455 | boolean hasFinalizer() { |
duke@1 | 1456 | return tree.finalizer != null; |
duke@1 | 1457 | } |
duke@1 | 1458 | }; |
duke@1 | 1459 | tryEnv.info.gaps = new ListBuffer<Integer>(); |
duke@1 | 1460 | genTry(tree.body, tree.catchers, tryEnv); |
duke@1 | 1461 | } |
duke@1 | 1462 | //where |
duke@1 | 1463 | /** Generate code for a try or synchronized statement |
duke@1 | 1464 | * @param body The body of the try or synchronized statement. |
duke@1 | 1465 | * @param catchers The lis of catch clauses. |
duke@1 | 1466 | * @param env the environment current for the body. |
duke@1 | 1467 | */ |
duke@1 | 1468 | void genTry(JCTree body, List<JCCatch> catchers, Env<GenContext> env) { |
duke@1 | 1469 | int limit = code.nextreg; |
duke@1 | 1470 | int startpc = code.curPc(); |
duke@1 | 1471 | Code.State stateTry = code.state.dup(); |
duke@1 | 1472 | genStat(body, env, CRT_BLOCK); |
duke@1 | 1473 | int endpc = code.curPc(); |
duke@1 | 1474 | boolean hasFinalizer = |
duke@1 | 1475 | env.info.finalize != null && |
duke@1 | 1476 | env.info.finalize.hasFinalizer(); |
duke@1 | 1477 | List<Integer> gaps = env.info.gaps.toList(); |
duke@1 | 1478 | code.statBegin(TreeInfo.endPos(body)); |
duke@1 | 1479 | genFinalizer(env); |
duke@1 | 1480 | code.statBegin(TreeInfo.endPos(env.tree)); |
vromero@2009 | 1481 | Chain exitChain = code.branch(goto_); |
vromero@2009 | 1482 | endFinalizerGap(env); |
vromero@2009 | 1483 | if (startpc != endpc) for (List<JCCatch> l = catchers; l.nonEmpty(); l = l.tail) { |
vromero@2009 | 1484 | // start off with exception on stack |
vromero@2009 | 1485 | code.entryPoint(stateTry, l.head.param.sym.type); |
vromero@2009 | 1486 | genCatch(l.head, env, startpc, endpc, gaps); |
vromero@2009 | 1487 | genFinalizer(env); |
vromero@2009 | 1488 | if (hasFinalizer || l.tail.nonEmpty()) { |
vromero@2009 | 1489 | code.statBegin(TreeInfo.endPos(env.tree)); |
vromero@2009 | 1490 | exitChain = Code.mergeChains(exitChain, |
vromero@2009 | 1491 | code.branch(goto_)); |
vromero@2009 | 1492 | } |
vromero@2009 | 1493 | endFinalizerGap(env); |
vromero@1929 | 1494 | } |
vromero@2009 | 1495 | if (hasFinalizer) { |
vromero@2009 | 1496 | // Create a new register segement to avoid allocating |
vromero@2009 | 1497 | // the same variables in finalizers and other statements. |
vromero@2009 | 1498 | code.newRegSegment(); |
vromero@2009 | 1499 | |
vromero@2009 | 1500 | // Add a catch-all clause. |
vromero@2009 | 1501 | |
vromero@2009 | 1502 | // start off with exception on stack |
vromero@2009 | 1503 | int catchallpc = code.entryPoint(stateTry, syms.throwableType); |
vromero@2009 | 1504 | |
vromero@2009 | 1505 | // Register all exception ranges for catch all clause. |
vromero@2009 | 1506 | // The range of the catch all clause is from the beginning |
vromero@2009 | 1507 | // of the try or synchronized block until the present |
vromero@2009 | 1508 | // code pointer excluding all gaps in the current |
vromero@2009 | 1509 | // environment's GenContext. |
vromero@2009 | 1510 | int startseg = startpc; |
vromero@2009 | 1511 | while (env.info.gaps.nonEmpty()) { |
vromero@2009 | 1512 | int endseg = env.info.gaps.next().intValue(); |
vromero@2009 | 1513 | registerCatch(body.pos(), startseg, endseg, |
vromero@2009 | 1514 | catchallpc, 0); |
vromero@2009 | 1515 | startseg = env.info.gaps.next().intValue(); |
duke@1 | 1516 | } |
vromero@2009 | 1517 | code.statBegin(TreeInfo.finalizerPos(env.tree)); |
vromero@2009 | 1518 | code.markStatBegin(); |
duke@1 | 1519 | |
vromero@2009 | 1520 | Item excVar = makeTemp(syms.throwableType); |
vromero@2009 | 1521 | excVar.store(); |
vromero@2009 | 1522 | genFinalizer(env); |
vromero@2009 | 1523 | excVar.load(); |
vromero@2009 | 1524 | registerCatch(body.pos(), startseg, |
vromero@2009 | 1525 | env.info.gaps.next().intValue(), |
vromero@2009 | 1526 | catchallpc, 0); |
vromero@2009 | 1527 | code.emitop0(athrow); |
vromero@2009 | 1528 | code.markDead(); |
duke@1 | 1529 | |
vromero@2009 | 1530 | // If there are jsr's to this finalizer, ... |
vromero@2009 | 1531 | if (env.info.cont != null) { |
vromero@2009 | 1532 | // Resolve all jsr's. |
vromero@2009 | 1533 | code.resolve(env.info.cont); |
duke@1 | 1534 | |
vromero@2009 | 1535 | // Mark statement line number |
duke@1 | 1536 | code.statBegin(TreeInfo.finalizerPos(env.tree)); |
duke@1 | 1537 | code.markStatBegin(); |
duke@1 | 1538 | |
vromero@2009 | 1539 | // Save return address. |
vromero@2009 | 1540 | LocalItem retVar = makeTemp(syms.throwableType); |
vromero@2009 | 1541 | retVar.store(); |
vromero@2009 | 1542 | |
vromero@2009 | 1543 | // Generate finalizer code. |
vromero@2009 | 1544 | env.info.finalize.genLast(); |
vromero@2009 | 1545 | |
vromero@2009 | 1546 | // Return. |
vromero@2009 | 1547 | code.emitop1w(ret, retVar.reg); |
vromero@1929 | 1548 | code.markDead(); |
duke@1 | 1549 | } |
duke@1 | 1550 | } |
duke@1 | 1551 | // Resolve all breaks. |
duke@1 | 1552 | code.resolve(exitChain); |
duke@1 | 1553 | |
duke@1 | 1554 | code.endScopes(limit); |
duke@1 | 1555 | } |
duke@1 | 1556 | |
duke@1 | 1557 | /** Generate code for a catch clause. |
duke@1 | 1558 | * @param tree The catch clause. |
duke@1 | 1559 | * @param env The environment current in the enclosing try. |
duke@1 | 1560 | * @param startpc Start pc of try-block. |
duke@1 | 1561 | * @param endpc End pc of try-block. |
duke@1 | 1562 | */ |
duke@1 | 1563 | void genCatch(JCCatch tree, |
duke@1 | 1564 | Env<GenContext> env, |
duke@1 | 1565 | int startpc, int endpc, |
duke@1 | 1566 | List<Integer> gaps) { |
duke@1 | 1567 | if (startpc != endpc) { |
mcimadamore@550 | 1568 | List<JCExpression> subClauses = TreeInfo.isMultiCatch(tree) ? |
darcy@969 | 1569 | ((JCTypeUnion)tree.param.vartype).alternatives : |
mcimadamore@641 | 1570 | List.of(tree.param.vartype); |
mcimadamore@641 | 1571 | while (gaps.nonEmpty()) { |
mcimadamore@641 | 1572 | for (JCExpression subCatch : subClauses) { |
mcimadamore@641 | 1573 | int catchType = makeRef(tree.pos(), subCatch.type); |
mcimadamore@641 | 1574 | int end = gaps.head.intValue(); |
mcimadamore@550 | 1575 | registerCatch(tree.pos(), |
mcimadamore@550 | 1576 | startpc, end, code.curPc(), |
mcimadamore@550 | 1577 | catchType); |
jjg@1755 | 1578 | if (subCatch.type.isAnnotated()) { |
jjg@1755 | 1579 | // All compounds share the same position, simply update the |
jjg@1755 | 1580 | // first one. |
jjg@1755 | 1581 | subCatch.type.getAnnotationMirrors().head.position.type_index = catchType; |
jjg@1755 | 1582 | } |
mcimadamore@550 | 1583 | } |
mcimadamore@641 | 1584 | gaps = gaps.tail; |
mcimadamore@641 | 1585 | startpc = gaps.head.intValue(); |
mcimadamore@641 | 1586 | gaps = gaps.tail; |
mcimadamore@641 | 1587 | } |
mcimadamore@641 | 1588 | if (startpc < endpc) { |
mcimadamore@641 | 1589 | for (JCExpression subCatch : subClauses) { |
mcimadamore@641 | 1590 | int catchType = makeRef(tree.pos(), subCatch.type); |
mcimadamore@550 | 1591 | registerCatch(tree.pos(), |
mcimadamore@550 | 1592 | startpc, endpc, code.curPc(), |
mcimadamore@550 | 1593 | catchType); |
jjg@1755 | 1594 | if (subCatch.type.isAnnotated()) { |
jjg@1755 | 1595 | // All compounds share the same position, simply update the |
jjg@1755 | 1596 | // first one. |
jjg@1755 | 1597 | subCatch.type.getAnnotationMirrors().head.position.type_index = catchType; |
jjg@1755 | 1598 | } |
mcimadamore@641 | 1599 | } |
duke@1 | 1600 | } |
duke@1 | 1601 | VarSymbol exparam = tree.param.sym; |
duke@1 | 1602 | code.statBegin(tree.pos); |
duke@1 | 1603 | code.markStatBegin(); |
duke@1 | 1604 | int limit = code.nextreg; |
duke@1 | 1605 | int exlocal = code.newLocal(exparam); |
duke@1 | 1606 | items.makeLocalItem(exparam).store(); |
duke@1 | 1607 | code.statBegin(TreeInfo.firstStatPos(tree.body)); |
duke@1 | 1608 | genStat(tree.body, env, CRT_BLOCK); |
duke@1 | 1609 | code.endScopes(limit); |
duke@1 | 1610 | code.statBegin(TreeInfo.endPos(tree.body)); |
duke@1 | 1611 | } |
duke@1 | 1612 | } |
duke@1 | 1613 | |
duke@1 | 1614 | /** Register a catch clause in the "Exceptions" code-attribute. |
duke@1 | 1615 | */ |
duke@1 | 1616 | void registerCatch(DiagnosticPosition pos, |
duke@1 | 1617 | int startpc, int endpc, |
duke@1 | 1618 | int handler_pc, int catch_type) { |
mcimadamore@1109 | 1619 | char startpc1 = (char)startpc; |
mcimadamore@1109 | 1620 | char endpc1 = (char)endpc; |
mcimadamore@1109 | 1621 | char handler_pc1 = (char)handler_pc; |
mcimadamore@1109 | 1622 | if (startpc1 == startpc && |
mcimadamore@1109 | 1623 | endpc1 == endpc && |
mcimadamore@1109 | 1624 | handler_pc1 == handler_pc) { |
mcimadamore@1109 | 1625 | code.addCatch(startpc1, endpc1, handler_pc1, |
mcimadamore@1109 | 1626 | (char)catch_type); |
mcimadamore@1109 | 1627 | } else { |
mcimadamore@1109 | 1628 | if (!useJsrLocally && !target.generateStackMapTable()) { |
mcimadamore@1109 | 1629 | useJsrLocally = true; |
mcimadamore@1109 | 1630 | throw new CodeSizeOverflow(); |
duke@1 | 1631 | } else { |
mcimadamore@1109 | 1632 | log.error(pos, "limit.code.too.large.for.try.stmt"); |
mcimadamore@1109 | 1633 | nerrs++; |
duke@1 | 1634 | } |
duke@1 | 1635 | } |
duke@1 | 1636 | } |
duke@1 | 1637 | |
duke@1 | 1638 | /** Very roughly estimate the number of instructions needed for |
duke@1 | 1639 | * the given tree. |
duke@1 | 1640 | */ |
duke@1 | 1641 | int estimateCodeComplexity(JCTree tree) { |
duke@1 | 1642 | if (tree == null) return 0; |
duke@1 | 1643 | class ComplexityScanner extends TreeScanner { |
duke@1 | 1644 | int complexity = 0; |
duke@1 | 1645 | public void scan(JCTree tree) { |
duke@1 | 1646 | if (complexity > jsrlimit) return; |
duke@1 | 1647 | super.scan(tree); |
duke@1 | 1648 | } |
duke@1 | 1649 | public void visitClassDef(JCClassDecl tree) {} |
duke@1 | 1650 | public void visitDoLoop(JCDoWhileLoop tree) |
duke@1 | 1651 | { super.visitDoLoop(tree); complexity++; } |
duke@1 | 1652 | public void visitWhileLoop(JCWhileLoop tree) |
duke@1 | 1653 | { super.visitWhileLoop(tree); complexity++; } |
duke@1 | 1654 | public void visitForLoop(JCForLoop tree) |
duke@1 | 1655 | { super.visitForLoop(tree); complexity++; } |
duke@1 | 1656 | public void visitSwitch(JCSwitch tree) |
duke@1 | 1657 | { super.visitSwitch(tree); complexity+=5; } |
duke@1 | 1658 | public void visitCase(JCCase tree) |
duke@1 | 1659 | { super.visitCase(tree); complexity++; } |
duke@1 | 1660 | public void visitSynchronized(JCSynchronized tree) |
duke@1 | 1661 | { super.visitSynchronized(tree); complexity+=6; } |
duke@1 | 1662 | public void visitTry(JCTry tree) |
duke@1 | 1663 | { super.visitTry(tree); |
duke@1 | 1664 | if (tree.finalizer != null) complexity+=6; } |
duke@1 | 1665 | public void visitCatch(JCCatch tree) |
duke@1 | 1666 | { super.visitCatch(tree); complexity+=2; } |
duke@1 | 1667 | public void visitConditional(JCConditional tree) |
duke@1 | 1668 | { super.visitConditional(tree); complexity+=2; } |
duke@1 | 1669 | public void visitIf(JCIf tree) |
duke@1 | 1670 | { super.visitIf(tree); complexity+=2; } |
duke@1 | 1671 | // note: for break, continue, and return we don't take unwind() into account. |
duke@1 | 1672 | public void visitBreak(JCBreak tree) |
duke@1 | 1673 | { super.visitBreak(tree); complexity+=1; } |
duke@1 | 1674 | public void visitContinue(JCContinue tree) |
duke@1 | 1675 | { super.visitContinue(tree); complexity+=1; } |
duke@1 | 1676 | public void visitReturn(JCReturn tree) |
duke@1 | 1677 | { super.visitReturn(tree); complexity+=1; } |
duke@1 | 1678 | public void visitThrow(JCThrow tree) |
duke@1 | 1679 | { super.visitThrow(tree); complexity+=1; } |
duke@1 | 1680 | public void visitAssert(JCAssert tree) |
duke@1 | 1681 | { super.visitAssert(tree); complexity+=5; } |
duke@1 | 1682 | public void visitApply(JCMethodInvocation tree) |
duke@1 | 1683 | { super.visitApply(tree); complexity+=2; } |
duke@1 | 1684 | public void visitNewClass(JCNewClass tree) |
duke@1 | 1685 | { scan(tree.encl); scan(tree.args); complexity+=2; } |
duke@1 | 1686 | public void visitNewArray(JCNewArray tree) |
duke@1 | 1687 | { super.visitNewArray(tree); complexity+=5; } |
duke@1 | 1688 | public void visitAssign(JCAssign tree) |
duke@1 | 1689 | { super.visitAssign(tree); complexity+=1; } |
duke@1 | 1690 | public void visitAssignop(JCAssignOp tree) |
duke@1 | 1691 | { super.visitAssignop(tree); complexity+=2; } |
duke@1 | 1692 | public void visitUnary(JCUnary tree) |
duke@1 | 1693 | { complexity+=1; |
duke@1 | 1694 | if (tree.type.constValue() == null) super.visitUnary(tree); } |
duke@1 | 1695 | public void visitBinary(JCBinary tree) |
duke@1 | 1696 | { complexity+=1; |
duke@1 | 1697 | if (tree.type.constValue() == null) super.visitBinary(tree); } |
duke@1 | 1698 | public void visitTypeTest(JCInstanceOf tree) |
duke@1 | 1699 | { super.visitTypeTest(tree); complexity+=1; } |
duke@1 | 1700 | public void visitIndexed(JCArrayAccess tree) |
duke@1 | 1701 | { super.visitIndexed(tree); complexity+=1; } |
duke@1 | 1702 | public void visitSelect(JCFieldAccess tree) |
duke@1 | 1703 | { super.visitSelect(tree); |
duke@1 | 1704 | if (tree.sym.kind == VAR) complexity+=1; } |
duke@1 | 1705 | public void visitIdent(JCIdent tree) { |
duke@1 | 1706 | if (tree.sym.kind == VAR) { |
duke@1 | 1707 | complexity+=1; |
duke@1 | 1708 | if (tree.type.constValue() == null && |
duke@1 | 1709 | tree.sym.owner.kind == TYP) |
duke@1 | 1710 | complexity+=1; |
duke@1 | 1711 | } |
duke@1 | 1712 | } |
duke@1 | 1713 | public void visitLiteral(JCLiteral tree) |
duke@1 | 1714 | { complexity+=1; } |
duke@1 | 1715 | public void visitTree(JCTree tree) {} |
duke@1 | 1716 | public void visitWildcard(JCWildcard tree) { |
duke@1 | 1717 | throw new AssertionError(this.getClass().getName()); |
duke@1 | 1718 | } |
duke@1 | 1719 | } |
duke@1 | 1720 | ComplexityScanner scanner = new ComplexityScanner(); |
duke@1 | 1721 | tree.accept(scanner); |
duke@1 | 1722 | return scanner.complexity; |
duke@1 | 1723 | } |
duke@1 | 1724 | |
duke@1 | 1725 | public void visitIf(JCIf tree) { |
duke@1 | 1726 | int limit = code.nextreg; |
duke@1 | 1727 | Chain thenExit = null; |
duke@1 | 1728 | CondItem c = genCond(TreeInfo.skipParens(tree.cond), |
duke@1 | 1729 | CRT_FLOW_CONTROLLER); |
duke@1 | 1730 | Chain elseChain = c.jumpFalse(); |
duke@1 | 1731 | if (!c.isFalse()) { |
duke@1 | 1732 | code.resolve(c.trueJumps); |
duke@1 | 1733 | genStat(tree.thenpart, env, CRT_STATEMENT | CRT_FLOW_TARGET); |
duke@1 | 1734 | thenExit = code.branch(goto_); |
duke@1 | 1735 | } |
duke@1 | 1736 | if (elseChain != null) { |
duke@1 | 1737 | code.resolve(elseChain); |
duke@1 | 1738 | if (tree.elsepart != null) |
duke@1 | 1739 | genStat(tree.elsepart, env,CRT_STATEMENT | CRT_FLOW_TARGET); |
duke@1 | 1740 | } |
duke@1 | 1741 | code.resolve(thenExit); |
duke@1 | 1742 | code.endScopes(limit); |
duke@1 | 1743 | } |
duke@1 | 1744 | |
duke@1 | 1745 | public void visitExec(JCExpressionStatement tree) { |
duke@1 | 1746 | // Optimize x++ to ++x and x-- to --x. |
duke@1 | 1747 | JCExpression e = tree.expr; |
duke@1 | 1748 | switch (e.getTag()) { |
jjg@1127 | 1749 | case POSTINC: |
jjg@1127 | 1750 | ((JCUnary) e).setTag(PREINC); |
duke@1 | 1751 | break; |
jjg@1127 | 1752 | case POSTDEC: |
jjg@1127 | 1753 | ((JCUnary) e).setTag(PREDEC); |
duke@1 | 1754 | break; |
duke@1 | 1755 | } |
duke@1 | 1756 | genExpr(tree.expr, tree.expr.type).drop(); |
duke@1 | 1757 | } |
duke@1 | 1758 | |
duke@1 | 1759 | public void visitBreak(JCBreak tree) { |
duke@1 | 1760 | Env<GenContext> targetEnv = unwind(tree.target, env); |
jjg@816 | 1761 | Assert.check(code.state.stacksize == 0); |
duke@1 | 1762 | targetEnv.info.addExit(code.branch(goto_)); |
duke@1 | 1763 | endFinalizerGaps(env, targetEnv); |
duke@1 | 1764 | } |
duke@1 | 1765 | |
duke@1 | 1766 | public void visitContinue(JCContinue tree) { |
duke@1 | 1767 | Env<GenContext> targetEnv = unwind(tree.target, env); |
jjg@816 | 1768 | Assert.check(code.state.stacksize == 0); |
duke@1 | 1769 | targetEnv.info.addCont(code.branch(goto_)); |
duke@1 | 1770 | endFinalizerGaps(env, targetEnv); |
duke@1 | 1771 | } |
duke@1 | 1772 | |
duke@1 | 1773 | public void visitReturn(JCReturn tree) { |
duke@1 | 1774 | int limit = code.nextreg; |
duke@1 | 1775 | final Env<GenContext> targetEnv; |
duke@1 | 1776 | if (tree.expr != null) { |
duke@1 | 1777 | Item r = genExpr(tree.expr, pt).load(); |
duke@1 | 1778 | if (hasFinally(env.enclMethod, env)) { |
duke@1 | 1779 | r = makeTemp(pt); |
duke@1 | 1780 | r.store(); |
duke@1 | 1781 | } |
duke@1 | 1782 | targetEnv = unwind(env.enclMethod, env); |
duke@1 | 1783 | r.load(); |
duke@1 | 1784 | code.emitop0(ireturn + Code.truncate(Code.typecode(pt))); |
duke@1 | 1785 | } else { |
vromero@1865 | 1786 | /* If we have a statement like: |
vromero@1865 | 1787 | * |
vromero@1865 | 1788 | * return; |
vromero@1865 | 1789 | * |
vromero@1865 | 1790 | * we need to store the code.pendingStatPos value before generating |
vromero@1865 | 1791 | * the finalizer. |
vromero@1865 | 1792 | */ |
vromero@1865 | 1793 | int tmpPos = code.pendingStatPos; |
duke@1 | 1794 | targetEnv = unwind(env.enclMethod, env); |
vromero@1865 | 1795 | code.pendingStatPos = tmpPos; |
duke@1 | 1796 | code.emitop0(return_); |
duke@1 | 1797 | } |
duke@1 | 1798 | endFinalizerGaps(env, targetEnv); |
duke@1 | 1799 | code.endScopes(limit); |
duke@1 | 1800 | } |
duke@1 | 1801 | |
duke@1 | 1802 | public void visitThrow(JCThrow tree) { |
duke@1 | 1803 | genExpr(tree.expr, tree.expr.type).load(); |
duke@1 | 1804 | code.emitop0(athrow); |
duke@1 | 1805 | } |
duke@1 | 1806 | |
duke@1 | 1807 | /* ************************************************************************ |
duke@1 | 1808 | * Visitor methods for expressions |
duke@1 | 1809 | *************************************************************************/ |
duke@1 | 1810 | |
duke@1 | 1811 | public void visitApply(JCMethodInvocation tree) { |
jjg@1521 | 1812 | setTypeAnnotationPositions(tree.pos); |
duke@1 | 1813 | // Generate code for method. |
duke@1 | 1814 | Item m = genExpr(tree.meth, methodType); |
duke@1 | 1815 | // Generate code for all arguments, where the expected types are |
duke@1 | 1816 | // the parameters of the method's external type (that is, any implicit |
duke@1 | 1817 | // outer instance of a super(...) call appears as first parameter). |
mcimadamore@1676 | 1818 | MethodSymbol msym = (MethodSymbol)TreeInfo.symbol(tree.meth); |
duke@1 | 1819 | genArgs(tree.args, |
mcimadamore@1676 | 1820 | msym.externalType(types).getParameterTypes()); |
mcimadamore@1676 | 1821 | if (!msym.isDynamic()) { |
mcimadamore@1676 | 1822 | code.statBegin(tree.pos); |
mcimadamore@1676 | 1823 | } |
duke@1 | 1824 | result = m.invoke(); |
duke@1 | 1825 | } |
duke@1 | 1826 | |
duke@1 | 1827 | public void visitConditional(JCConditional tree) { |
duke@1 | 1828 | Chain thenExit = null; |
duke@1 | 1829 | CondItem c = genCond(tree.cond, CRT_FLOW_CONTROLLER); |
duke@1 | 1830 | Chain elseChain = c.jumpFalse(); |
duke@1 | 1831 | if (!c.isFalse()) { |
duke@1 | 1832 | code.resolve(c.trueJumps); |
duke@1 | 1833 | int startpc = genCrt ? code.curPc() : 0; |
duke@1 | 1834 | genExpr(tree.truepart, pt).load(); |
duke@1 | 1835 | code.state.forceStackTop(tree.type); |
duke@1 | 1836 | if (genCrt) code.crt.put(tree.truepart, CRT_FLOW_TARGET, |
duke@1 | 1837 | startpc, code.curPc()); |
duke@1 | 1838 | thenExit = code.branch(goto_); |
duke@1 | 1839 | } |
duke@1 | 1840 | if (elseChain != null) { |
duke@1 | 1841 | code.resolve(elseChain); |
duke@1 | 1842 | int startpc = genCrt ? code.curPc() : 0; |
duke@1 | 1843 | genExpr(tree.falsepart, pt).load(); |
duke@1 | 1844 | code.state.forceStackTop(tree.type); |
duke@1 | 1845 | if (genCrt) code.crt.put(tree.falsepart, CRT_FLOW_TARGET, |
duke@1 | 1846 | startpc, code.curPc()); |
duke@1 | 1847 | } |
duke@1 | 1848 | code.resolve(thenExit); |
duke@1 | 1849 | result = items.makeStackItem(pt); |
duke@1 | 1850 | } |
duke@1 | 1851 | |
jjg@1755 | 1852 | private void setTypeAnnotationPositions(int treePos) { |
jjg@1755 | 1853 | MethodSymbol meth = code.meth; |
jjg@1755 | 1854 | boolean initOrClinit = code.meth.getKind() == javax.lang.model.element.ElementKind.CONSTRUCTOR |
jjg@1755 | 1855 | || code.meth.getKind() == javax.lang.model.element.ElementKind.STATIC_INIT; |
jjg@1521 | 1856 | |
jjg@1755 | 1857 | for (Attribute.TypeCompound ta : meth.getRawTypeAttributes()) { |
jjg@1755 | 1858 | if (ta.hasUnknownPosition()) |
jjg@1755 | 1859 | ta.tryFixPosition(); |
jjg@1521 | 1860 | |
jjg@1755 | 1861 | if (ta.position.matchesPos(treePos)) |
jjg@1755 | 1862 | ta.position.updatePosOffset(code.cp); |
jjg@1755 | 1863 | } |
jjg@1521 | 1864 | |
jjg@1755 | 1865 | if (!initOrClinit) |
jjg@1755 | 1866 | return; |
jjg@1521 | 1867 | |
jjg@1755 | 1868 | for (Attribute.TypeCompound ta : meth.owner.getRawTypeAttributes()) { |
jjg@1755 | 1869 | if (ta.hasUnknownPosition()) |
jjg@1755 | 1870 | ta.tryFixPosition(); |
jjg@1755 | 1871 | |
jjg@1755 | 1872 | if (ta.position.matchesPos(treePos)) |
jjg@1755 | 1873 | ta.position.updatePosOffset(code.cp); |
jjg@1755 | 1874 | } |
jjg@1755 | 1875 | |
jjg@1755 | 1876 | ClassSymbol clazz = meth.enclClass(); |
jjg@1755 | 1877 | for (Symbol s : new com.sun.tools.javac.model.FilteredMemberList(clazz.members())) { |
jjg@1755 | 1878 | if (!s.getKind().isField()) |
jjg@1755 | 1879 | continue; |
jjg@1755 | 1880 | |
jjg@1755 | 1881 | for (Attribute.TypeCompound ta : s.getRawTypeAttributes()) { |
jjg@1755 | 1882 | if (ta.hasUnknownPosition()) |
jjg@1755 | 1883 | ta.tryFixPosition(); |
jjg@1755 | 1884 | |
jjg@1755 | 1885 | if (ta.position.matchesPos(treePos)) |
jjg@1755 | 1886 | ta.position.updatePosOffset(code.cp); |
jjg@1755 | 1887 | } |
jjg@1755 | 1888 | } |
jjg@1755 | 1889 | } |
jjg@1521 | 1890 | |
duke@1 | 1891 | public void visitNewClass(JCNewClass tree) { |
duke@1 | 1892 | // Enclosing instances or anonymous classes should have been eliminated |
duke@1 | 1893 | // by now. |
jjg@816 | 1894 | Assert.check(tree.encl == null && tree.def == null); |
jjg@1521 | 1895 | setTypeAnnotationPositions(tree.pos); |
duke@1 | 1896 | |
duke@1 | 1897 | code.emitop2(new_, makeRef(tree.pos(), tree.type)); |
duke@1 | 1898 | code.emitop0(dup); |
duke@1 | 1899 | |
duke@1 | 1900 | // Generate code for all arguments, where the expected types are |
duke@1 | 1901 | // the parameters of the constructor's external type (that is, |
duke@1 | 1902 | // any implicit outer instance appears as first parameter). |
duke@1 | 1903 | genArgs(tree.args, tree.constructor.externalType(types).getParameterTypes()); |
duke@1 | 1904 | |
duke@1 | 1905 | items.makeMemberItem(tree.constructor, true).invoke(); |
duke@1 | 1906 | result = items.makeStackItem(tree.type); |
duke@1 | 1907 | } |
duke@1 | 1908 | |
duke@1 | 1909 | public void visitNewArray(JCNewArray tree) { |
jjg@1521 | 1910 | setTypeAnnotationPositions(tree.pos); |
jjg@308 | 1911 | |
duke@1 | 1912 | if (tree.elems != null) { |
duke@1 | 1913 | Type elemtype = types.elemtype(tree.type); |
duke@1 | 1914 | loadIntConst(tree.elems.length()); |
duke@1 | 1915 | Item arr = makeNewArray(tree.pos(), tree.type, 1); |
duke@1 | 1916 | int i = 0; |
duke@1 | 1917 | for (List<JCExpression> l = tree.elems; l.nonEmpty(); l = l.tail) { |
duke@1 | 1918 | arr.duplicate(); |
duke@1 | 1919 | loadIntConst(i); |
duke@1 | 1920 | i++; |
duke@1 | 1921 | genExpr(l.head, elemtype).load(); |
duke@1 | 1922 | items.makeIndexedItem(elemtype).store(); |
duke@1 | 1923 | } |
duke@1 | 1924 | result = arr; |
duke@1 | 1925 | } else { |
duke@1 | 1926 | for (List<JCExpression> l = tree.dims; l.nonEmpty(); l = l.tail) { |
duke@1 | 1927 | genExpr(l.head, syms.intType).load(); |
duke@1 | 1928 | } |
duke@1 | 1929 | result = makeNewArray(tree.pos(), tree.type, tree.dims.length()); |
duke@1 | 1930 | } |
duke@1 | 1931 | } |
duke@1 | 1932 | //where |
duke@1 | 1933 | /** Generate code to create an array with given element type and number |
duke@1 | 1934 | * of dimensions. |
duke@1 | 1935 | */ |
duke@1 | 1936 | Item makeNewArray(DiagnosticPosition pos, Type type, int ndims) { |
duke@1 | 1937 | Type elemtype = types.elemtype(type); |
jjg@782 | 1938 | if (types.dimensions(type) > ClassFile.MAX_DIMENSIONS) { |
duke@1 | 1939 | log.error(pos, "limit.dimensions"); |
duke@1 | 1940 | nerrs++; |
duke@1 | 1941 | } |
duke@1 | 1942 | int elemcode = Code.arraycode(elemtype); |
duke@1 | 1943 | if (elemcode == 0 || (elemcode == 1 && ndims == 1)) { |
duke@1 | 1944 | code.emitAnewarray(makeRef(pos, elemtype), type); |
duke@1 | 1945 | } else if (elemcode == 1) { |
duke@1 | 1946 | code.emitMultianewarray(ndims, makeRef(pos, type), type); |
duke@1 | 1947 | } else { |
duke@1 | 1948 | code.emitNewarray(elemcode, type); |
duke@1 | 1949 | } |
duke@1 | 1950 | return items.makeStackItem(type); |
duke@1 | 1951 | } |
duke@1 | 1952 | |
duke@1 | 1953 | public void visitParens(JCParens tree) { |
duke@1 | 1954 | result = genExpr(tree.expr, tree.expr.type); |
duke@1 | 1955 | } |
duke@1 | 1956 | |
duke@1 | 1957 | public void visitAssign(JCAssign tree) { |
duke@1 | 1958 | Item l = genExpr(tree.lhs, tree.lhs.type); |
duke@1 | 1959 | genExpr(tree.rhs, tree.lhs.type).load(); |
duke@1 | 1960 | result = items.makeAssignItem(l); |
duke@1 | 1961 | } |
duke@1 | 1962 | |
duke@1 | 1963 | public void visitAssignop(JCAssignOp tree) { |
duke@1 | 1964 | OperatorSymbol operator = (OperatorSymbol) tree.operator; |
duke@1 | 1965 | Item l; |
duke@1 | 1966 | if (operator.opcode == string_add) { |
duke@1 | 1967 | // Generate code to make a string buffer |
duke@1 | 1968 | makeStringBuffer(tree.pos()); |
duke@1 | 1969 | |
duke@1 | 1970 | // Generate code for first string, possibly save one |
duke@1 | 1971 | // copy under buffer |
duke@1 | 1972 | l = genExpr(tree.lhs, tree.lhs.type); |
duke@1 | 1973 | if (l.width() > 0) { |
duke@1 | 1974 | code.emitop0(dup_x1 + 3 * (l.width() - 1)); |
duke@1 | 1975 | } |
duke@1 | 1976 | |
duke@1 | 1977 | // Load first string and append to buffer. |
duke@1 | 1978 | l.load(); |
duke@1 | 1979 | appendString(tree.lhs); |
duke@1 | 1980 | |
duke@1 | 1981 | // Append all other strings to buffer. |
duke@1 | 1982 | appendStrings(tree.rhs); |
duke@1 | 1983 | |
duke@1 | 1984 | // Convert buffer to string. |
duke@1 | 1985 | bufferToString(tree.pos()); |
duke@1 | 1986 | } else { |
duke@1 | 1987 | // Generate code for first expression |
duke@1 | 1988 | l = genExpr(tree.lhs, tree.lhs.type); |
duke@1 | 1989 | |
duke@1 | 1990 | // If we have an increment of -32768 to +32767 of a local |
duke@1 | 1991 | // int variable we can use an incr instruction instead of |
duke@1 | 1992 | // proceeding further. |
jjg@1127 | 1993 | if ((tree.hasTag(PLUS_ASG) || tree.hasTag(MINUS_ASG)) && |
duke@1 | 1994 | l instanceof LocalItem && |
jjg@1374 | 1995 | tree.lhs.type.getTag().isSubRangeOf(INT) && |
jjg@1374 | 1996 | tree.rhs.type.getTag().isSubRangeOf(INT) && |
duke@1 | 1997 | tree.rhs.type.constValue() != null) { |
duke@1 | 1998 | int ival = ((Number) tree.rhs.type.constValue()).intValue(); |
jjg@1127 | 1999 | if (tree.hasTag(MINUS_ASG)) ival = -ival; |
duke@1 | 2000 | ((LocalItem)l).incr(ival); |
duke@1 | 2001 | result = l; |
duke@1 | 2002 | return; |
duke@1 | 2003 | } |
duke@1 | 2004 | // Otherwise, duplicate expression, load one copy |
duke@1 | 2005 | // and complete binary operation. |
duke@1 | 2006 | l.duplicate(); |
duke@1 | 2007 | l.coerce(operator.type.getParameterTypes().head).load(); |
duke@1 | 2008 | completeBinop(tree.lhs, tree.rhs, operator).coerce(tree.lhs.type); |
duke@1 | 2009 | } |
duke@1 | 2010 | result = items.makeAssignItem(l); |
duke@1 | 2011 | } |
duke@1 | 2012 | |
duke@1 | 2013 | public void visitUnary(JCUnary tree) { |
duke@1 | 2014 | OperatorSymbol operator = (OperatorSymbol)tree.operator; |
jjg@1127 | 2015 | if (tree.hasTag(NOT)) { |
duke@1 | 2016 | CondItem od = genCond(tree.arg, false); |
duke@1 | 2017 | result = od.negate(); |
duke@1 | 2018 | } else { |
duke@1 | 2019 | Item od = genExpr(tree.arg, operator.type.getParameterTypes().head); |
duke@1 | 2020 | switch (tree.getTag()) { |
jjg@1127 | 2021 | case POS: |
duke@1 | 2022 | result = od.load(); |
duke@1 | 2023 | break; |
jjg@1127 | 2024 | case NEG: |
duke@1 | 2025 | result = od.load(); |
duke@1 | 2026 | code.emitop0(operator.opcode); |
duke@1 | 2027 | break; |
jjg@1127 | 2028 | case COMPL: |
duke@1 | 2029 | result = od.load(); |
duke@1 | 2030 | emitMinusOne(od.typecode); |
duke@1 | 2031 | code.emitop0(operator.opcode); |
duke@1 | 2032 | break; |
jjg@1127 | 2033 | case PREINC: case PREDEC: |
duke@1 | 2034 | od.duplicate(); |
duke@1 | 2035 | if (od instanceof LocalItem && |
duke@1 | 2036 | (operator.opcode == iadd || operator.opcode == isub)) { |
jjg@1127 | 2037 | ((LocalItem)od).incr(tree.hasTag(PREINC) ? 1 : -1); |
duke@1 | 2038 | result = od; |
duke@1 | 2039 | } else { |
duke@1 | 2040 | od.load(); |
duke@1 | 2041 | code.emitop0(one(od.typecode)); |
duke@1 | 2042 | code.emitop0(operator.opcode); |
duke@1 | 2043 | // Perform narrowing primitive conversion if byte, |
duke@1 | 2044 | // char, or short. Fix for 4304655. |
duke@1 | 2045 | if (od.typecode != INTcode && |
duke@1 | 2046 | Code.truncate(od.typecode) == INTcode) |
duke@1 | 2047 | code.emitop0(int2byte + od.typecode - BYTEcode); |
duke@1 | 2048 | result = items.makeAssignItem(od); |
duke@1 | 2049 | } |
duke@1 | 2050 | break; |
jjg@1127 | 2051 | case POSTINC: case POSTDEC: |
duke@1 | 2052 | od.duplicate(); |
duke@1 | 2053 | if (od instanceof LocalItem && |
duke@1 | 2054 | (operator.opcode == iadd || operator.opcode == isub)) { |
duke@1 | 2055 | Item res = od.load(); |
jjg@1127 | 2056 | ((LocalItem)od).incr(tree.hasTag(POSTINC) ? 1 : -1); |
duke@1 | 2057 | result = res; |
duke@1 | 2058 | } else { |
duke@1 | 2059 | Item res = od.load(); |
duke@1 | 2060 | od.stash(od.typecode); |
duke@1 | 2061 | code.emitop0(one(od.typecode)); |
duke@1 | 2062 | code.emitop0(operator.opcode); |
duke@1 | 2063 | // Perform narrowing primitive conversion if byte, |
duke@1 | 2064 | // char, or short. Fix for 4304655. |
duke@1 | 2065 | if (od.typecode != INTcode && |
duke@1 | 2066 | Code.truncate(od.typecode) == INTcode) |
duke@1 | 2067 | code.emitop0(int2byte + od.typecode - BYTEcode); |
duke@1 | 2068 | od.store(); |
duke@1 | 2069 | result = res; |
duke@1 | 2070 | } |
duke@1 | 2071 | break; |
jjg@1127 | 2072 | case NULLCHK: |
duke@1 | 2073 | result = od.load(); |
duke@1 | 2074 | code.emitop0(dup); |
duke@1 | 2075 | genNullCheck(tree.pos()); |
duke@1 | 2076 | break; |
duke@1 | 2077 | default: |
jjg@816 | 2078 | Assert.error(); |
duke@1 | 2079 | } |
duke@1 | 2080 | } |
duke@1 | 2081 | } |
duke@1 | 2082 | |
duke@1 | 2083 | /** Generate a null check from the object value at stack top. */ |
duke@1 | 2084 | private void genNullCheck(DiagnosticPosition pos) { |
duke@1 | 2085 | callMethod(pos, syms.objectType, names.getClass, |
duke@1 | 2086 | List.<Type>nil(), false); |
duke@1 | 2087 | code.emitop0(pop); |
duke@1 | 2088 | } |
duke@1 | 2089 | |
duke@1 | 2090 | public void visitBinary(JCBinary tree) { |
duke@1 | 2091 | OperatorSymbol operator = (OperatorSymbol)tree.operator; |
duke@1 | 2092 | if (operator.opcode == string_add) { |
duke@1 | 2093 | // Create a string buffer. |
duke@1 | 2094 | makeStringBuffer(tree.pos()); |
duke@1 | 2095 | // Append all strings to buffer. |
duke@1 | 2096 | appendStrings(tree); |
duke@1 | 2097 | // Convert buffer to string. |
duke@1 | 2098 | bufferToString(tree.pos()); |
duke@1 | 2099 | result = items.makeStackItem(syms.stringType); |
jjg@1127 | 2100 | } else if (tree.hasTag(AND)) { |
duke@1 | 2101 | CondItem lcond = genCond(tree.lhs, CRT_FLOW_CONTROLLER); |
duke@1 | 2102 | if (!lcond.isFalse()) { |
duke@1 | 2103 | Chain falseJumps = lcond.jumpFalse(); |
duke@1 | 2104 | code.resolve(lcond.trueJumps); |
duke@1 | 2105 | CondItem rcond = genCond(tree.rhs, CRT_FLOW_TARGET); |
duke@1 | 2106 | result = items. |
duke@1 | 2107 | makeCondItem(rcond.opcode, |
duke@1 | 2108 | rcond.trueJumps, |
jjg@507 | 2109 | Code.mergeChains(falseJumps, |
duke@1 | 2110 | rcond.falseJumps)); |
duke@1 | 2111 | } else { |
duke@1 | 2112 | result = lcond; |
duke@1 | 2113 | } |
jjg@1127 | 2114 | } else if (tree.hasTag(OR)) { |
duke@1 | 2115 | CondItem lcond = genCond(tree.lhs, CRT_FLOW_CONTROLLER); |
duke@1 | 2116 | if (!lcond.isTrue()) { |
duke@1 | 2117 | Chain trueJumps = lcond.jumpTrue(); |
duke@1 | 2118 | code.resolve(lcond.falseJumps); |
duke@1 | 2119 | CondItem rcond = genCond(tree.rhs, CRT_FLOW_TARGET); |
duke@1 | 2120 | result = items. |
duke@1 | 2121 | makeCondItem(rcond.opcode, |
jjg@507 | 2122 | Code.mergeChains(trueJumps, rcond.trueJumps), |
duke@1 | 2123 | rcond.falseJumps); |
duke@1 | 2124 | } else { |
duke@1 | 2125 | result = lcond; |
duke@1 | 2126 | } |
duke@1 | 2127 | } else { |
duke@1 | 2128 | Item od = genExpr(tree.lhs, operator.type.getParameterTypes().head); |
duke@1 | 2129 | od.load(); |
duke@1 | 2130 | result = completeBinop(tree.lhs, tree.rhs, operator); |
duke@1 | 2131 | } |
duke@1 | 2132 | } |
duke@1 | 2133 | //where |
duke@1 | 2134 | /** Make a new string buffer. |
duke@1 | 2135 | */ |
duke@1 | 2136 | void makeStringBuffer(DiagnosticPosition pos) { |
duke@1 | 2137 | code.emitop2(new_, makeRef(pos, stringBufferType)); |
duke@1 | 2138 | code.emitop0(dup); |
duke@1 | 2139 | callMethod( |
duke@1 | 2140 | pos, stringBufferType, names.init, List.<Type>nil(), false); |
duke@1 | 2141 | } |
duke@1 | 2142 | |
duke@1 | 2143 | /** Append value (on tos) to string buffer (on tos - 1). |
duke@1 | 2144 | */ |
duke@1 | 2145 | void appendString(JCTree tree) { |
duke@1 | 2146 | Type t = tree.type.baseType(); |
jjg@1374 | 2147 | if (!t.isPrimitive() && t.tsym != syms.stringType.tsym) { |
duke@1 | 2148 | t = syms.objectType; |
duke@1 | 2149 | } |
duke@1 | 2150 | items.makeMemberItem(getStringBufferAppend(tree, t), false).invoke(); |
duke@1 | 2151 | } |
duke@1 | 2152 | Symbol getStringBufferAppend(JCTree tree, Type t) { |
jjg@816 | 2153 | Assert.checkNull(t.constValue()); |
duke@1 | 2154 | Symbol method = stringBufferAppend.get(t); |
duke@1 | 2155 | if (method == null) { |
duke@1 | 2156 | method = rs.resolveInternalMethod(tree.pos(), |
duke@1 | 2157 | attrEnv, |
duke@1 | 2158 | stringBufferType, |
duke@1 | 2159 | names.append, |
duke@1 | 2160 | List.of(t), |
duke@1 | 2161 | null); |
duke@1 | 2162 | stringBufferAppend.put(t, method); |
duke@1 | 2163 | } |
duke@1 | 2164 | return method; |
duke@1 | 2165 | } |
duke@1 | 2166 | |
duke@1 | 2167 | /** Add all strings in tree to string buffer. |
duke@1 | 2168 | */ |
duke@1 | 2169 | void appendStrings(JCTree tree) { |
duke@1 | 2170 | tree = TreeInfo.skipParens(tree); |
jjg@1127 | 2171 | if (tree.hasTag(PLUS) && tree.type.constValue() == null) { |
duke@1 | 2172 | JCBinary op = (JCBinary) tree; |
duke@1 | 2173 | if (op.operator.kind == MTH && |
duke@1 | 2174 | ((OperatorSymbol) op.operator).opcode == string_add) { |
duke@1 | 2175 | appendStrings(op.lhs); |
duke@1 | 2176 | appendStrings(op.rhs); |
duke@1 | 2177 | return; |
duke@1 | 2178 | } |
duke@1 | 2179 | } |
duke@1 | 2180 | genExpr(tree, tree.type).load(); |
duke@1 | 2181 | appendString(tree); |
duke@1 | 2182 | } |
duke@1 | 2183 | |
duke@1 | 2184 | /** Convert string buffer on tos to string. |
duke@1 | 2185 | */ |
duke@1 | 2186 | void bufferToString(DiagnosticPosition pos) { |
duke@1 | 2187 | callMethod( |
duke@1 | 2188 | pos, |
duke@1 | 2189 | stringBufferType, |
duke@1 | 2190 | names.toString, |
duke@1 | 2191 | List.<Type>nil(), |
duke@1 | 2192 | false); |
duke@1 | 2193 | } |
duke@1 | 2194 | |
duke@1 | 2195 | /** Complete generating code for operation, with left operand |
duke@1 | 2196 | * already on stack. |
duke@1 | 2197 | * @param lhs The tree representing the left operand. |
duke@1 | 2198 | * @param rhs The tree representing the right operand. |
duke@1 | 2199 | * @param operator The operator symbol. |
duke@1 | 2200 | */ |
duke@1 | 2201 | Item completeBinop(JCTree lhs, JCTree rhs, OperatorSymbol operator) { |
duke@1 | 2202 | MethodType optype = (MethodType)operator.type; |
duke@1 | 2203 | int opcode = operator.opcode; |
duke@1 | 2204 | if (opcode >= if_icmpeq && opcode <= if_icmple && |
duke@1 | 2205 | rhs.type.constValue() instanceof Number && |
duke@1 | 2206 | ((Number) rhs.type.constValue()).intValue() == 0) { |
duke@1 | 2207 | opcode = opcode + (ifeq - if_icmpeq); |
duke@1 | 2208 | } else if (opcode >= if_acmpeq && opcode <= if_acmpne && |
duke@1 | 2209 | TreeInfo.isNull(rhs)) { |
duke@1 | 2210 | opcode = opcode + (if_acmp_null - if_acmpeq); |
duke@1 | 2211 | } else { |
duke@1 | 2212 | // The expected type of the right operand is |
duke@1 | 2213 | // the second parameter type of the operator, except for |
duke@1 | 2214 | // shifts with long shiftcount, where we convert the opcode |
duke@1 | 2215 | // to a short shift and the expected type to int. |
duke@1 | 2216 | Type rtype = operator.erasure(types).getParameterTypes().tail.head; |
duke@1 | 2217 | if (opcode >= ishll && opcode <= lushrl) { |
duke@1 | 2218 | opcode = opcode + (ishl - ishll); |
duke@1 | 2219 | rtype = syms.intType; |
duke@1 | 2220 | } |
duke@1 | 2221 | // Generate code for right operand and load. |
duke@1 | 2222 | genExpr(rhs, rtype).load(); |
duke@1 | 2223 | // If there are two consecutive opcode instructions, |
duke@1 | 2224 | // emit the first now. |
duke@1 | 2225 | if (opcode >= (1 << preShift)) { |
duke@1 | 2226 | code.emitop0(opcode >> preShift); |
duke@1 | 2227 | opcode = opcode & 0xFF; |
duke@1 | 2228 | } |
duke@1 | 2229 | } |
duke@1 | 2230 | if (opcode >= ifeq && opcode <= if_acmpne || |
duke@1 | 2231 | opcode == if_acmp_null || opcode == if_acmp_nonnull) { |
duke@1 | 2232 | return items.makeCondItem(opcode); |
duke@1 | 2233 | } else { |
duke@1 | 2234 | code.emitop0(opcode); |
duke@1 | 2235 | return items.makeStackItem(optype.restype); |
duke@1 | 2236 | } |
duke@1 | 2237 | } |
duke@1 | 2238 | |
duke@1 | 2239 | public void visitTypeCast(JCTypeCast tree) { |
jjg@1521 | 2240 | setTypeAnnotationPositions(tree.pos); |
duke@1 | 2241 | result = genExpr(tree.expr, tree.clazz.type).load(); |
duke@1 | 2242 | // Additional code is only needed if we cast to a reference type |
duke@1 | 2243 | // which is not statically a supertype of the expression's type. |
duke@1 | 2244 | // For basic types, the coerce(...) in genExpr(...) will do |
duke@1 | 2245 | // the conversion. |
jjg@1374 | 2246 | if (!tree.clazz.type.isPrimitive() && |
duke@1 | 2247 | types.asSuper(tree.expr.type, tree.clazz.type.tsym) == null) { |
duke@1 | 2248 | code.emitop2(checkcast, makeRef(tree.pos(), tree.clazz.type)); |
duke@1 | 2249 | } |
duke@1 | 2250 | } |
duke@1 | 2251 | |
duke@1 | 2252 | public void visitWildcard(JCWildcard tree) { |
duke@1 | 2253 | throw new AssertionError(this.getClass().getName()); |
duke@1 | 2254 | } |
duke@1 | 2255 | |
duke@1 | 2256 | public void visitTypeTest(JCInstanceOf tree) { |
jjg@1521 | 2257 | setTypeAnnotationPositions(tree.pos); |
duke@1 | 2258 | genExpr(tree.expr, tree.expr.type).load(); |
duke@1 | 2259 | code.emitop2(instanceof_, makeRef(tree.pos(), tree.clazz.type)); |
duke@1 | 2260 | result = items.makeStackItem(syms.booleanType); |
duke@1 | 2261 | } |
duke@1 | 2262 | |
duke@1 | 2263 | public void visitIndexed(JCArrayAccess tree) { |
duke@1 | 2264 | genExpr(tree.indexed, tree.indexed.type).load(); |
duke@1 | 2265 | genExpr(tree.index, syms.intType).load(); |
duke@1 | 2266 | result = items.makeIndexedItem(tree.type); |
duke@1 | 2267 | } |
duke@1 | 2268 | |
duke@1 | 2269 | public void visitIdent(JCIdent tree) { |
duke@1 | 2270 | Symbol sym = tree.sym; |
duke@1 | 2271 | if (tree.name == names._this || tree.name == names._super) { |
duke@1 | 2272 | Item res = tree.name == names._this |
duke@1 | 2273 | ? items.makeThisItem() |
duke@1 | 2274 | : items.makeSuperItem(); |
duke@1 | 2275 | if (sym.kind == MTH) { |
duke@1 | 2276 | // Generate code to address the constructor. |
duke@1 | 2277 | res.load(); |
duke@1 | 2278 | res = items.makeMemberItem(sym, true); |
duke@1 | 2279 | } |
duke@1 | 2280 | result = res; |
duke@1 | 2281 | } else if (sym.kind == VAR && sym.owner.kind == MTH) { |
duke@1 | 2282 | result = items.makeLocalItem((VarSymbol)sym); |
mcimadamore@1336 | 2283 | } else if (isInvokeDynamic(sym)) { |
mcimadamore@1336 | 2284 | result = items.makeDynamicItem(sym); |
duke@1 | 2285 | } else if ((sym.flags() & STATIC) != 0) { |
duke@1 | 2286 | if (!isAccessSuper(env.enclMethod)) |
duke@1 | 2287 | sym = binaryQualifier(sym, env.enclClass.type); |
duke@1 | 2288 | result = items.makeStaticItem(sym); |
duke@1 | 2289 | } else { |
duke@1 | 2290 | items.makeThisItem().load(); |
duke@1 | 2291 | sym = binaryQualifier(sym, env.enclClass.type); |
duke@1 | 2292 | result = items.makeMemberItem(sym, (sym.flags() & PRIVATE) != 0); |
duke@1 | 2293 | } |
duke@1 | 2294 | } |
duke@1 | 2295 | |
duke@1 | 2296 | public void visitSelect(JCFieldAccess tree) { |
duke@1 | 2297 | Symbol sym = tree.sym; |
duke@1 | 2298 | |
duke@1 | 2299 | if (tree.name == names._class) { |
jjg@816 | 2300 | Assert.check(target.hasClassLiterals()); |
vromero@1670 | 2301 | code.emitLdc(makeRef(tree.pos(), tree.selected.type)); |
duke@1 | 2302 | result = items.makeStackItem(pt); |
duke@1 | 2303 | return; |
jjg@1521 | 2304 | } |
duke@1 | 2305 | |
duke@1 | 2306 | Symbol ssym = TreeInfo.symbol(tree.selected); |
duke@1 | 2307 | |
duke@1 | 2308 | // Are we selecting via super? |
duke@1 | 2309 | boolean selectSuper = |
duke@1 | 2310 | ssym != null && (ssym.kind == TYP || ssym.name == names._super); |
duke@1 | 2311 | |
duke@1 | 2312 | // Are we accessing a member of the superclass in an access method |
duke@1 | 2313 | // resulting from a qualified super? |
duke@1 | 2314 | boolean accessSuper = isAccessSuper(env.enclMethod); |
duke@1 | 2315 | |
duke@1 | 2316 | Item base = (selectSuper) |
duke@1 | 2317 | ? items.makeSuperItem() |
duke@1 | 2318 | : genExpr(tree.selected, tree.selected.type); |
duke@1 | 2319 | |
duke@1 | 2320 | if (sym.kind == VAR && ((VarSymbol) sym).getConstValue() != null) { |
duke@1 | 2321 | // We are seeing a variable that is constant but its selecting |
duke@1 | 2322 | // expression is not. |
duke@1 | 2323 | if ((sym.flags() & STATIC) != 0) { |
duke@1 | 2324 | if (!selectSuper && (ssym == null || ssym.kind != TYP)) |
duke@1 | 2325 | base = base.load(); |
duke@1 | 2326 | base.drop(); |
duke@1 | 2327 | } else { |
duke@1 | 2328 | base.load(); |
duke@1 | 2329 | genNullCheck(tree.selected.pos()); |
duke@1 | 2330 | } |
duke@1 | 2331 | result = items. |
duke@1 | 2332 | makeImmediateItem(sym.type, ((VarSymbol) sym).getConstValue()); |
duke@1 | 2333 | } else { |
mcimadamore@1336 | 2334 | if (isInvokeDynamic(sym)) { |
mcimadamore@1336 | 2335 | result = items.makeDynamicItem(sym); |
mcimadamore@1336 | 2336 | return; |
mcimadamore@1336 | 2337 | } else if (!accessSuper) { |
duke@1 | 2338 | sym = binaryQualifier(sym, tree.selected.type); |
mcimadamore@1336 | 2339 | } |
duke@1 | 2340 | if ((sym.flags() & STATIC) != 0) { |
duke@1 | 2341 | if (!selectSuper && (ssym == null || ssym.kind != TYP)) |
duke@1 | 2342 | base = base.load(); |
duke@1 | 2343 | base.drop(); |
duke@1 | 2344 | result = items.makeStaticItem(sym); |
duke@1 | 2345 | } else { |
duke@1 | 2346 | base.load(); |
duke@1 | 2347 | if (sym == syms.lengthVar) { |
duke@1 | 2348 | code.emitop0(arraylength); |
duke@1 | 2349 | result = items.makeStackItem(syms.intType); |
duke@1 | 2350 | } else { |
duke@1 | 2351 | result = items. |
duke@1 | 2352 | makeMemberItem(sym, |
duke@1 | 2353 | (sym.flags() & PRIVATE) != 0 || |
duke@1 | 2354 | selectSuper || accessSuper); |
duke@1 | 2355 | } |
duke@1 | 2356 | } |
duke@1 | 2357 | } |
duke@1 | 2358 | } |
duke@1 | 2359 | |
mcimadamore@1336 | 2360 | public boolean isInvokeDynamic(Symbol sym) { |
mcimadamore@1336 | 2361 | return sym.kind == MTH && ((MethodSymbol)sym).isDynamic(); |
mcimadamore@1336 | 2362 | } |
mcimadamore@1336 | 2363 | |
duke@1 | 2364 | public void visitLiteral(JCLiteral tree) { |
jjg@1374 | 2365 | if (tree.type.hasTag(BOT)) { |
duke@1 | 2366 | code.emitop0(aconst_null); |
duke@1 | 2367 | if (types.dimensions(pt) > 1) { |
duke@1 | 2368 | code.emitop2(checkcast, makeRef(tree.pos(), pt)); |
duke@1 | 2369 | result = items.makeStackItem(pt); |
duke@1 | 2370 | } else { |
duke@1 | 2371 | result = items.makeStackItem(tree.type); |
duke@1 | 2372 | } |
duke@1 | 2373 | } |
duke@1 | 2374 | else |
duke@1 | 2375 | result = items.makeImmediateItem(tree.type, tree.value); |
duke@1 | 2376 | } |
duke@1 | 2377 | |
duke@1 | 2378 | public void visitLetExpr(LetExpr tree) { |
duke@1 | 2379 | int limit = code.nextreg; |
duke@1 | 2380 | genStats(tree.defs, env); |
duke@1 | 2381 | result = genExpr(tree.expr, tree.expr.type).load(); |
duke@1 | 2382 | code.endScopes(limit); |
duke@1 | 2383 | } |
duke@1 | 2384 | |
vromero@1432 | 2385 | private void generateReferencesToPrunedTree(ClassSymbol classSymbol, Pool pool) { |
vromero@1432 | 2386 | List<JCTree> prunedInfo = lower.prunedTree.get(classSymbol); |
vromero@1432 | 2387 | if (prunedInfo != null) { |
vromero@1432 | 2388 | for (JCTree prunedTree: prunedInfo) { |
vromero@1432 | 2389 | prunedTree.accept(classReferenceVisitor); |
vromero@1432 | 2390 | } |
vromero@1432 | 2391 | } |
vromero@1432 | 2392 | } |
vromero@1432 | 2393 | |
duke@1 | 2394 | /* ************************************************************************ |
duke@1 | 2395 | * main method |
duke@1 | 2396 | *************************************************************************/ |
duke@1 | 2397 | |
duke@1 | 2398 | /** Generate code for a class definition. |
duke@1 | 2399 | * @param env The attribution environment that belongs to the |
duke@1 | 2400 | * outermost class containing this class definition. |
duke@1 | 2401 | * We need this for resolving some additional symbols. |
duke@1 | 2402 | * @param cdef The tree representing the class definition. |
duke@1 | 2403 | * @return True if code is generated with no errors. |
duke@1 | 2404 | */ |
duke@1 | 2405 | public boolean genClass(Env<AttrContext> env, JCClassDecl cdef) { |
duke@1 | 2406 | try { |
duke@1 | 2407 | attrEnv = env; |
duke@1 | 2408 | ClassSymbol c = cdef.sym; |
duke@1 | 2409 | this.toplevel = env.toplevel; |
ksrini@1138 | 2410 | this.endPosTable = toplevel.endPositions; |
duke@1 | 2411 | // If this is a class definition requiring Miranda methods, |
duke@1 | 2412 | // add them. |
duke@1 | 2413 | if (generateIproxies && |
duke@1 | 2414 | (c.flags() & (INTERFACE|ABSTRACT)) == ABSTRACT |
duke@1 | 2415 | && !allowGenerics // no Miranda methods available with generics |
duke@1 | 2416 | ) |
duke@1 | 2417 | implementInterfaceMethods(c); |
duke@1 | 2418 | cdef.defs = normalizeDefs(cdef.defs, c); |
duke@1 | 2419 | c.pool = pool; |
duke@1 | 2420 | pool.reset(); |
vromero@1432 | 2421 | generateReferencesToPrunedTree(c, pool); |
duke@1 | 2422 | Env<GenContext> localEnv = |
duke@1 | 2423 | new Env<GenContext>(cdef, new GenContext()); |
duke@1 | 2424 | localEnv.toplevel = env.toplevel; |
duke@1 | 2425 | localEnv.enclClass = cdef; |
duke@1 | 2426 | for (List<JCTree> l = cdef.defs; l.nonEmpty(); l = l.tail) { |
duke@1 | 2427 | genDef(l.head, localEnv); |
duke@1 | 2428 | } |
duke@1 | 2429 | if (pool.numEntries() > Pool.MAX_ENTRIES) { |
duke@1 | 2430 | log.error(cdef.pos(), "limit.pool"); |
duke@1 | 2431 | nerrs++; |
duke@1 | 2432 | } |
duke@1 | 2433 | if (nerrs != 0) { |
duke@1 | 2434 | // if errors, discard code |
duke@1 | 2435 | for (List<JCTree> l = cdef.defs; l.nonEmpty(); l = l.tail) { |
jjg@1127 | 2436 | if (l.head.hasTag(METHODDEF)) |
duke@1 | 2437 | ((JCMethodDecl) l.head).sym.code = null; |
duke@1 | 2438 | } |
duke@1 | 2439 | } |
duke@1 | 2440 | cdef.defs = List.nil(); // discard trees |
duke@1 | 2441 | return nerrs == 0; |
duke@1 | 2442 | } finally { |
duke@1 | 2443 | // note: this method does NOT support recursion. |
duke@1 | 2444 | attrEnv = null; |
duke@1 | 2445 | this.env = null; |
duke@1 | 2446 | toplevel = null; |
ksrini@1138 | 2447 | endPosTable = null; |
duke@1 | 2448 | nerrs = 0; |
duke@1 | 2449 | } |
duke@1 | 2450 | } |
duke@1 | 2451 | |
duke@1 | 2452 | /* ************************************************************************ |
duke@1 | 2453 | * Auxiliary classes |
duke@1 | 2454 | *************************************************************************/ |
duke@1 | 2455 | |
duke@1 | 2456 | /** An abstract class for finalizer generation. |
duke@1 | 2457 | */ |
duke@1 | 2458 | abstract class GenFinalizer { |
duke@1 | 2459 | /** Generate code to clean up when unwinding. */ |
duke@1 | 2460 | abstract void gen(); |
duke@1 | 2461 | |
duke@1 | 2462 | /** Generate code to clean up at last. */ |
duke@1 | 2463 | abstract void genLast(); |
duke@1 | 2464 | |
duke@1 | 2465 | /** Does this finalizer have some nontrivial cleanup to perform? */ |
duke@1 | 2466 | boolean hasFinalizer() { return true; } |
duke@1 | 2467 | } |
duke@1 | 2468 | |
duke@1 | 2469 | /** code generation contexts, |
duke@1 | 2470 | * to be used as type parameter for environments. |
duke@1 | 2471 | */ |
duke@1 | 2472 | static class GenContext { |
duke@1 | 2473 | |
duke@1 | 2474 | /** A chain for all unresolved jumps that exit the current environment. |
duke@1 | 2475 | */ |
duke@1 | 2476 | Chain exit = null; |
duke@1 | 2477 | |
duke@1 | 2478 | /** A chain for all unresolved jumps that continue in the |
duke@1 | 2479 | * current environment. |
duke@1 | 2480 | */ |
duke@1 | 2481 | Chain cont = null; |
duke@1 | 2482 | |
duke@1 | 2483 | /** A closure that generates the finalizer of the current environment. |
duke@1 | 2484 | * Only set for Synchronized and Try contexts. |
duke@1 | 2485 | */ |
duke@1 | 2486 | GenFinalizer finalize = null; |
duke@1 | 2487 | |
duke@1 | 2488 | /** Is this a switch statement? If so, allocate registers |
duke@1 | 2489 | * even when the variable declaration is unreachable. |
duke@1 | 2490 | */ |
duke@1 | 2491 | boolean isSwitch = false; |
duke@1 | 2492 | |
duke@1 | 2493 | /** A list buffer containing all gaps in the finalizer range, |
duke@1 | 2494 | * where a catch all exception should not apply. |
duke@1 | 2495 | */ |
duke@1 | 2496 | ListBuffer<Integer> gaps = null; |
duke@1 | 2497 | |
duke@1 | 2498 | /** Add given chain to exit chain. |
duke@1 | 2499 | */ |
duke@1 | 2500 | void addExit(Chain c) { |
duke@1 | 2501 | exit = Code.mergeChains(c, exit); |
duke@1 | 2502 | } |
duke@1 | 2503 | |
duke@1 | 2504 | /** Add given chain to cont chain. |
duke@1 | 2505 | */ |
duke@1 | 2506 | void addCont(Chain c) { |
duke@1 | 2507 | cont = Code.mergeChains(c, cont); |
duke@1 | 2508 | } |
duke@1 | 2509 | } |
duke@1 | 2510 | } |