Sat, 07 Nov 2020 10:30:02 +0800
Added tag mips-jdk8u275-b01 for changeset eb6ee6a5f2fe
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. Oracle designates this |
aoqi@0 | 8 | * particular file as subject to the "Classpath" exception as provided |
aoqi@0 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
aoqi@0 | 10 | * |
aoqi@0 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 15 | * accompanied this code). |
aoqi@0 | 16 | * |
aoqi@0 | 17 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 20 | * |
aoqi@0 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 22 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 23 | * questions. |
aoqi@0 | 24 | */ |
aoqi@0 | 25 | |
aoqi@0 | 26 | package com.sun.tools.javac.jvm; |
aoqi@0 | 27 | |
aoqi@0 | 28 | import com.sun.tools.javac.code.Kinds; |
aoqi@0 | 29 | import com.sun.tools.javac.code.Symbol; |
aoqi@0 | 30 | import com.sun.tools.javac.code.Symbol.*; |
aoqi@0 | 31 | import com.sun.tools.javac.code.Type; |
aoqi@0 | 32 | import com.sun.tools.javac.code.Types; |
aoqi@0 | 33 | import com.sun.tools.javac.code.Types.UniqueType; |
aoqi@0 | 34 | |
aoqi@0 | 35 | import com.sun.tools.javac.util.ArrayUtils; |
aoqi@0 | 36 | import com.sun.tools.javac.util.Assert; |
aoqi@0 | 37 | import com.sun.tools.javac.util.Filter; |
aoqi@0 | 38 | import com.sun.tools.javac.util.Name; |
aoqi@0 | 39 | |
aoqi@0 | 40 | import java.util.*; |
aoqi@0 | 41 | |
aoqi@0 | 42 | /** An internal structure that corresponds to the constant pool of a classfile. |
aoqi@0 | 43 | * |
aoqi@0 | 44 | * <p><b>This is NOT part of any supported API. |
aoqi@0 | 45 | * If you write code that depends on this, you do so at your own risk. |
aoqi@0 | 46 | * This code and its internal interfaces are subject to change or |
aoqi@0 | 47 | * deletion without notice.</b> |
aoqi@0 | 48 | */ |
aoqi@0 | 49 | public class Pool { |
aoqi@0 | 50 | |
aoqi@0 | 51 | public static final int MAX_ENTRIES = 0xFFFF; |
aoqi@0 | 52 | public static final int MAX_STRING_LENGTH = 0xFFFF; |
aoqi@0 | 53 | |
aoqi@0 | 54 | /** Index of next constant to be entered. |
aoqi@0 | 55 | */ |
aoqi@0 | 56 | int pp; |
aoqi@0 | 57 | |
aoqi@0 | 58 | /** The initial pool buffer. |
aoqi@0 | 59 | */ |
aoqi@0 | 60 | Object[] pool; |
aoqi@0 | 61 | |
aoqi@0 | 62 | /** A hashtable containing all constants in the pool. |
aoqi@0 | 63 | */ |
aoqi@0 | 64 | Map<Object,Integer> indices; |
aoqi@0 | 65 | |
aoqi@0 | 66 | Types types; |
aoqi@0 | 67 | |
aoqi@0 | 68 | /** Construct a pool with given number of elements and element array. |
aoqi@0 | 69 | */ |
aoqi@0 | 70 | public Pool(int pp, Object[] pool, Types types) { |
aoqi@0 | 71 | this.pp = pp; |
aoqi@0 | 72 | this.pool = pool; |
aoqi@0 | 73 | this.types = types; |
aoqi@0 | 74 | this.indices = new HashMap<Object,Integer>(pool.length); |
aoqi@0 | 75 | for (int i = 1; i < pp; i++) { |
aoqi@0 | 76 | if (pool[i] != null) indices.put(pool[i], i); |
aoqi@0 | 77 | } |
aoqi@0 | 78 | } |
aoqi@0 | 79 | |
aoqi@0 | 80 | /** Construct an empty pool. |
aoqi@0 | 81 | */ |
aoqi@0 | 82 | public Pool(Types types) { |
aoqi@0 | 83 | this(1, new Object[64], types); |
aoqi@0 | 84 | } |
aoqi@0 | 85 | |
aoqi@0 | 86 | /** Return the number of entries in the constant pool. |
aoqi@0 | 87 | */ |
aoqi@0 | 88 | public int numEntries() { |
aoqi@0 | 89 | return pp; |
aoqi@0 | 90 | } |
aoqi@0 | 91 | |
aoqi@0 | 92 | /** Remove everything from this pool. |
aoqi@0 | 93 | */ |
aoqi@0 | 94 | public void reset() { |
aoqi@0 | 95 | pp = 1; |
aoqi@0 | 96 | indices.clear(); |
aoqi@0 | 97 | } |
aoqi@0 | 98 | |
aoqi@0 | 99 | /** Place an object in the pool, unless it is already there. |
aoqi@0 | 100 | * If object is a symbol also enter its owner unless the owner is a |
aoqi@0 | 101 | * package. Return the object's index in the pool. |
aoqi@0 | 102 | */ |
aoqi@0 | 103 | public int put(Object value) { |
aoqi@0 | 104 | value = makePoolValue(value); |
aoqi@0 | 105 | // assert !(value instanceof Type.TypeVar); |
aoqi@0 | 106 | Integer index = indices.get(value); |
aoqi@0 | 107 | if (index == null) { |
aoqi@0 | 108 | // System.err.println("put " + value + " " + value.getClass());//DEBUG |
aoqi@0 | 109 | index = pp; |
aoqi@0 | 110 | indices.put(value, index); |
aoqi@0 | 111 | pool = ArrayUtils.ensureCapacity(pool, pp); |
aoqi@0 | 112 | pool[pp++] = value; |
aoqi@0 | 113 | if (value instanceof Long || value instanceof Double) { |
aoqi@0 | 114 | pool = ArrayUtils.ensureCapacity(pool, pp); |
aoqi@0 | 115 | pool[pp++] = null; |
aoqi@0 | 116 | } |
aoqi@0 | 117 | } |
aoqi@0 | 118 | return index.intValue(); |
aoqi@0 | 119 | } |
aoqi@0 | 120 | |
aoqi@0 | 121 | Object makePoolValue(Object o) { |
aoqi@0 | 122 | if (o instanceof DynamicMethodSymbol) { |
aoqi@0 | 123 | return new DynamicMethod((DynamicMethodSymbol)o, types); |
aoqi@0 | 124 | } else if (o instanceof MethodSymbol) { |
aoqi@0 | 125 | return new Method((MethodSymbol)o, types); |
aoqi@0 | 126 | } else if (o instanceof VarSymbol) { |
aoqi@0 | 127 | return new Variable((VarSymbol)o, types); |
aoqi@0 | 128 | } else if (o instanceof Type) { |
aoqi@0 | 129 | return new UniqueType((Type)o, types); |
aoqi@0 | 130 | } else { |
aoqi@0 | 131 | return o; |
aoqi@0 | 132 | } |
aoqi@0 | 133 | } |
aoqi@0 | 134 | |
aoqi@0 | 135 | /** Return the given object's index in the pool, |
aoqi@0 | 136 | * or -1 if object is not in there. |
aoqi@0 | 137 | */ |
aoqi@0 | 138 | public int get(Object o) { |
aoqi@0 | 139 | Integer n = indices.get(o); |
aoqi@0 | 140 | return n == null ? -1 : n.intValue(); |
aoqi@0 | 141 | } |
aoqi@0 | 142 | |
aoqi@0 | 143 | static class Method extends DelegatedSymbol<MethodSymbol> { |
aoqi@0 | 144 | UniqueType uniqueType; |
aoqi@0 | 145 | Method(MethodSymbol m, Types types) { |
aoqi@0 | 146 | super(m); |
aoqi@0 | 147 | this.uniqueType = new UniqueType(m.type, types); |
aoqi@0 | 148 | } |
aoqi@0 | 149 | public boolean equals(Object any) { |
aoqi@0 | 150 | if (!(any instanceof Method)) return false; |
aoqi@0 | 151 | MethodSymbol o = ((Method)any).other; |
aoqi@0 | 152 | MethodSymbol m = this.other; |
aoqi@0 | 153 | return |
aoqi@0 | 154 | o.name == m.name && |
aoqi@0 | 155 | o.owner == m.owner && |
aoqi@0 | 156 | ((Method)any).uniqueType.equals(uniqueType); |
aoqi@0 | 157 | } |
aoqi@0 | 158 | public int hashCode() { |
aoqi@0 | 159 | MethodSymbol m = this.other; |
aoqi@0 | 160 | return |
aoqi@0 | 161 | m.name.hashCode() * 33 + |
aoqi@0 | 162 | m.owner.hashCode() * 9 + |
aoqi@0 | 163 | uniqueType.hashCode(); |
aoqi@0 | 164 | } |
aoqi@0 | 165 | } |
aoqi@0 | 166 | |
aoqi@0 | 167 | static class DynamicMethod extends Method { |
aoqi@0 | 168 | public Object[] uniqueStaticArgs; |
aoqi@0 | 169 | |
aoqi@0 | 170 | DynamicMethod(DynamicMethodSymbol m, Types types) { |
aoqi@0 | 171 | super(m, types); |
aoqi@0 | 172 | uniqueStaticArgs = getUniqueTypeArray(m.staticArgs, types); |
aoqi@0 | 173 | } |
aoqi@0 | 174 | |
aoqi@0 | 175 | @Override |
aoqi@0 | 176 | public boolean equals(Object any) { |
aoqi@0 | 177 | if (!super.equals(any)) return false; |
aoqi@0 | 178 | if (!(any instanceof DynamicMethod)) return false; |
aoqi@0 | 179 | DynamicMethodSymbol dm1 = (DynamicMethodSymbol)other; |
aoqi@0 | 180 | DynamicMethodSymbol dm2 = (DynamicMethodSymbol)((DynamicMethod)any).other; |
aoqi@0 | 181 | return dm1.bsm == dm2.bsm && |
aoqi@0 | 182 | dm1.bsmKind == dm2.bsmKind && |
aoqi@0 | 183 | Arrays.equals(uniqueStaticArgs, |
aoqi@0 | 184 | ((DynamicMethod)any).uniqueStaticArgs); |
aoqi@0 | 185 | } |
aoqi@0 | 186 | |
aoqi@0 | 187 | @Override |
aoqi@0 | 188 | public int hashCode() { |
aoqi@0 | 189 | int hash = super.hashCode(); |
aoqi@0 | 190 | DynamicMethodSymbol dm = (DynamicMethodSymbol)other; |
aoqi@0 | 191 | hash += dm.bsmKind * 7 + |
aoqi@0 | 192 | dm.bsm.hashCode() * 11; |
aoqi@0 | 193 | for (int i = 0; i < dm.staticArgs.length; i++) { |
aoqi@0 | 194 | hash += (uniqueStaticArgs[i].hashCode() * 23); |
aoqi@0 | 195 | } |
aoqi@0 | 196 | return hash; |
aoqi@0 | 197 | } |
aoqi@0 | 198 | |
aoqi@0 | 199 | private Object[] getUniqueTypeArray(Object[] objects, Types types) { |
aoqi@0 | 200 | Object[] result = new Object[objects.length]; |
aoqi@0 | 201 | for (int i = 0; i < objects.length; i++) { |
aoqi@0 | 202 | if (objects[i] instanceof Type) { |
aoqi@0 | 203 | result[i] = new UniqueType((Type)objects[i], types); |
aoqi@0 | 204 | } else { |
aoqi@0 | 205 | result[i] = objects[i]; |
aoqi@0 | 206 | } |
aoqi@0 | 207 | } |
aoqi@0 | 208 | return result; |
aoqi@0 | 209 | } |
aoqi@0 | 210 | } |
aoqi@0 | 211 | |
aoqi@0 | 212 | static class Variable extends DelegatedSymbol<VarSymbol> { |
aoqi@0 | 213 | UniqueType uniqueType; |
aoqi@0 | 214 | Variable(VarSymbol v, Types types) { |
aoqi@0 | 215 | super(v); |
aoqi@0 | 216 | this.uniqueType = new UniqueType(v.type, types); |
aoqi@0 | 217 | } |
aoqi@0 | 218 | public boolean equals(Object any) { |
aoqi@0 | 219 | if (!(any instanceof Variable)) return false; |
aoqi@0 | 220 | VarSymbol o = ((Variable)any).other; |
aoqi@0 | 221 | VarSymbol v = other; |
aoqi@0 | 222 | return |
aoqi@0 | 223 | o.name == v.name && |
aoqi@0 | 224 | o.owner == v.owner && |
aoqi@0 | 225 | ((Variable)any).uniqueType.equals(uniqueType); |
aoqi@0 | 226 | } |
aoqi@0 | 227 | public int hashCode() { |
aoqi@0 | 228 | VarSymbol v = other; |
aoqi@0 | 229 | return |
aoqi@0 | 230 | v.name.hashCode() * 33 + |
aoqi@0 | 231 | v.owner.hashCode() * 9 + |
aoqi@0 | 232 | uniqueType.hashCode(); |
aoqi@0 | 233 | } |
aoqi@0 | 234 | } |
aoqi@0 | 235 | |
aoqi@0 | 236 | public static class MethodHandle { |
aoqi@0 | 237 | |
aoqi@0 | 238 | /** Reference kind - see ClassFile */ |
aoqi@0 | 239 | int refKind; |
aoqi@0 | 240 | |
aoqi@0 | 241 | /** Reference symbol */ |
aoqi@0 | 242 | Symbol refSym; |
aoqi@0 | 243 | |
aoqi@0 | 244 | UniqueType uniqueType; |
aoqi@0 | 245 | |
aoqi@0 | 246 | public MethodHandle(int refKind, Symbol refSym, Types types) { |
aoqi@0 | 247 | this.refKind = refKind; |
aoqi@0 | 248 | this.refSym = refSym; |
aoqi@0 | 249 | this.uniqueType = new UniqueType(this.refSym.type, types); |
aoqi@0 | 250 | checkConsistent(); |
aoqi@0 | 251 | } |
aoqi@0 | 252 | public boolean equals(Object other) { |
aoqi@0 | 253 | if (!(other instanceof MethodHandle)) return false; |
aoqi@0 | 254 | MethodHandle mr = (MethodHandle) other; |
aoqi@0 | 255 | if (mr.refKind != refKind) return false; |
aoqi@0 | 256 | Symbol o = mr.refSym; |
aoqi@0 | 257 | return |
aoqi@0 | 258 | o.name == refSym.name && |
aoqi@0 | 259 | o.owner == refSym.owner && |
aoqi@0 | 260 | ((MethodHandle)other).uniqueType.equals(uniqueType); |
aoqi@0 | 261 | } |
aoqi@0 | 262 | public int hashCode() { |
aoqi@0 | 263 | return |
aoqi@0 | 264 | refKind * 65 + |
aoqi@0 | 265 | refSym.name.hashCode() * 33 + |
aoqi@0 | 266 | refSym.owner.hashCode() * 9 + |
aoqi@0 | 267 | uniqueType.hashCode(); |
aoqi@0 | 268 | } |
aoqi@0 | 269 | |
aoqi@0 | 270 | /** |
aoqi@0 | 271 | * Check consistency of reference kind and symbol (see JVMS 4.4.8) |
aoqi@0 | 272 | */ |
aoqi@0 | 273 | @SuppressWarnings("fallthrough") |
aoqi@0 | 274 | private void checkConsistent() { |
aoqi@0 | 275 | boolean staticOk = false; |
aoqi@0 | 276 | int expectedKind = -1; |
aoqi@0 | 277 | Filter<Name> nameFilter = nonInitFilter; |
aoqi@0 | 278 | boolean interfaceOwner = false; |
aoqi@0 | 279 | switch (refKind) { |
aoqi@0 | 280 | case ClassFile.REF_getStatic: |
aoqi@0 | 281 | case ClassFile.REF_putStatic: |
aoqi@0 | 282 | staticOk = true; |
aoqi@0 | 283 | case ClassFile.REF_getField: |
aoqi@0 | 284 | case ClassFile.REF_putField: |
aoqi@0 | 285 | expectedKind = Kinds.VAR; |
aoqi@0 | 286 | break; |
aoqi@0 | 287 | case ClassFile.REF_newInvokeSpecial: |
aoqi@0 | 288 | nameFilter = initFilter; |
aoqi@0 | 289 | expectedKind = Kinds.MTH; |
aoqi@0 | 290 | break; |
aoqi@0 | 291 | case ClassFile.REF_invokeInterface: |
aoqi@0 | 292 | interfaceOwner = true; |
aoqi@0 | 293 | expectedKind = Kinds.MTH; |
aoqi@0 | 294 | break; |
aoqi@0 | 295 | case ClassFile.REF_invokeStatic: |
aoqi@0 | 296 | interfaceOwner = true; |
aoqi@0 | 297 | staticOk = true; |
aoqi@0 | 298 | case ClassFile.REF_invokeVirtual: |
aoqi@0 | 299 | expectedKind = Kinds.MTH; |
aoqi@0 | 300 | break; |
aoqi@0 | 301 | case ClassFile.REF_invokeSpecial: |
aoqi@0 | 302 | interfaceOwner = true; |
aoqi@0 | 303 | expectedKind = Kinds.MTH; |
aoqi@0 | 304 | break; |
aoqi@0 | 305 | } |
aoqi@0 | 306 | Assert.check(!refSym.isStatic() || staticOk); |
aoqi@0 | 307 | Assert.check(refSym.kind == expectedKind); |
aoqi@0 | 308 | Assert.check(nameFilter.accepts(refSym.name)); |
aoqi@0 | 309 | Assert.check(!refSym.owner.isInterface() || interfaceOwner); |
aoqi@0 | 310 | } |
aoqi@0 | 311 | //where |
aoqi@0 | 312 | Filter<Name> nonInitFilter = new Filter<Name>() { |
aoqi@0 | 313 | public boolean accepts(Name n) { |
aoqi@0 | 314 | return n != n.table.names.init && n != n.table.names.clinit; |
aoqi@0 | 315 | } |
aoqi@0 | 316 | }; |
aoqi@0 | 317 | |
aoqi@0 | 318 | Filter<Name> initFilter = new Filter<Name>() { |
aoqi@0 | 319 | public boolean accepts(Name n) { |
aoqi@0 | 320 | return n == n.table.names.init; |
aoqi@0 | 321 | } |
aoqi@0 | 322 | }; |
aoqi@0 | 323 | } |
aoqi@0 | 324 | } |