1 /* 2 * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package jdk.vm.ci.hotspot; 24 25 import static jdk.vm.ci.hotspot.CompilerToVM.compilerToVM; 26 import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.runtime; 27 import static jdk.vm.ci.hotspot.HotSpotVMConfig.config; 28 import static jdk.vm.ci.hotspot.UnsafeAccess.UNSAFE; 29 30 import java.lang.annotation.Annotation; 31 import java.lang.reflect.Executable; 32 import java.lang.reflect.InvocationTargetException; 33 import java.lang.reflect.Method; 34 import java.lang.reflect.Modifier; 35 import java.lang.reflect.Type; 36 import java.util.HashMap; 37 import java.util.Map; 38 39 import jdk.vm.ci.common.JVMCIError; 40 import jdk.vm.ci.meta.Constant; 41 import jdk.vm.ci.meta.ConstantPool; 42 import jdk.vm.ci.meta.DefaultProfilingInfo; 43 import jdk.vm.ci.meta.ExceptionHandler; 44 import jdk.vm.ci.meta.JavaConstant; 45 import jdk.vm.ci.meta.JavaMethod; 46 import jdk.vm.ci.meta.JavaType; 47 import jdk.vm.ci.meta.LineNumberTable; 48 import jdk.vm.ci.meta.LineNumberTableImpl; 49 import jdk.vm.ci.meta.Local; 50 import jdk.vm.ci.meta.LocalImpl; 51 import jdk.vm.ci.meta.LocalVariableTable; 52 import jdk.vm.ci.meta.LocalVariableTableImpl; 53 import jdk.vm.ci.meta.ModifiersProvider; 54 import jdk.vm.ci.meta.ProfilingInfo; 55 import jdk.vm.ci.meta.ResolvedJavaMethod; 56 import jdk.vm.ci.meta.ResolvedJavaType; 57 import jdk.vm.ci.meta.Signature; 58 import jdk.vm.ci.meta.SpeculationLog; 59 import jdk.vm.ci.meta.TriState; 60 61 /** 62 * Implementation of {@link JavaMethod} for resolved HotSpot methods. 63 */ 64 final class HotSpotResolvedJavaMethodImpl extends HotSpotMethod implements HotSpotResolvedJavaMethod, HotSpotProxified, MetaspaceWrapperObject { 65 66 /** 67 * Reference to metaspace Method object. 68 */ 69 private final long metaspaceMethod; 70 71 private final HotSpotResolvedObjectTypeImpl holder; 72 private final HotSpotConstantPool constantPool; 73 private final HotSpotSignature signature; 74 private HotSpotMethodData methodData; 75 private byte[] code; 76 private Executable toJavaCache; 77 78 /** 79 * Gets the holder of a HotSpot metaspace method native object. 80 * 81 * @param metaspaceMethod a metaspace Method object 82 * @return the {@link ResolvedJavaType} corresponding to the holder of the 83 * {@code metaspaceMethod} 84 */ 85 private static HotSpotResolvedObjectTypeImpl getHolder(long metaspaceMethod) { 86 HotSpotVMConfig config = config(); 87 final long metaspaceConstMethod = UNSAFE.getAddress(metaspaceMethod + config.methodConstMethodOffset); 88 final long metaspaceConstantPool = UNSAFE.getAddress(metaspaceConstMethod + config.constMethodConstantsOffset); 89 return compilerToVM().getResolvedJavaType(null, metaspaceConstantPool + config.constantPoolHolderOffset, false); 90 } 91 92 /** 93 * Gets the JVMCI mirror from a HotSpot method. The VM is responsible for ensuring that the 94 * Method* is kept alive for the duration of this call and the 95 * {@link HotSpotJVMCIMetaAccessContext} keeps it alive after that. 96 * 97 * Called from the VM. 98 * 99 * @param metaspaceMethod a metaspace Method object 100 * @return the {@link ResolvedJavaMethod} corresponding to {@code metaspaceMethod} 101 */ 102 @SuppressWarnings("unused") 103 private static HotSpotResolvedJavaMethod fromMetaspace(long metaspaceMethod) { 104 HotSpotResolvedObjectTypeImpl holder = getHolder(metaspaceMethod); 105 return holder.createMethod(metaspaceMethod); 106 } 107 108 HotSpotResolvedJavaMethodImpl(HotSpotResolvedObjectTypeImpl holder, long metaspaceMethod) { 109 // It would be too much work to get the method name here so we fill it in later. 110 super(null); 111 this.metaspaceMethod = metaspaceMethod; 112 this.holder = holder; 113 114 HotSpotVMConfig config = config(); 115 final long constMethod = getConstMethod(); 116 117 /* 118 * Get the constant pool from the metaspace method. Some methods (e.g. intrinsics for 119 * signature-polymorphic method handle methods) have their own constant pool instead of the 120 * one from their holder. 121 */ 122 final long metaspaceConstantPool = UNSAFE.getAddress(constMethod + config.constMethodConstantsOffset); 123 if (metaspaceConstantPool == holder.getConstantPool().getMetaspaceConstantPool()) { 124 this.constantPool = holder.getConstantPool(); 125 } else { 126 this.constantPool = compilerToVM().getConstantPool(null, constMethod + config.constMethodConstantsOffset); 127 } 128 129 final int nameIndex = UNSAFE.getChar(constMethod + config.constMethodNameIndexOffset); 130 this.name = constantPool.lookupUtf8(nameIndex); 131 132 final int signatureIndex = UNSAFE.getChar(constMethod + config.constMethodSignatureIndexOffset); 133 this.signature = (HotSpotSignature) constantPool.lookupSignature(signatureIndex); 134 } 135 136 /** 137 * Returns a pointer to this method's constant method data structure ( 138 * {@code Method::_constMethod}). This pointer isn't wrapped since it should be safe to use it 139 * within the context of this HotSpotResolvedJavaMethodImpl since the Method* and ConstMethod* 140 * are kept alive as a pair. 141 * 142 * @return pointer to this method's ConstMethod 143 */ 144 private long getConstMethod() { 145 assert metaspaceMethod != 0; 146 return UNSAFE.getAddress(metaspaceMethod + config().methodConstMethodOffset); 147 } 148 149 @Override 150 public boolean equals(Object obj) { 151 if (this == obj) { 152 return true; 153 } 154 if (obj instanceof HotSpotResolvedJavaMethodImpl) { 155 HotSpotResolvedJavaMethodImpl that = (HotSpotResolvedJavaMethodImpl) obj; 156 return that.metaspaceMethod == metaspaceMethod; 157 } 158 return false; 159 } 160 161 @Override 162 public int hashCode() { 163 return (int) metaspaceMethod; 164 } 165 166 /** 167 * Returns this method's flags ({@code Method::_flags}). 168 * 169 * @return flags of this method 170 */ 171 private int getFlags() { 172 return UNSAFE.getShort(metaspaceMethod + config().methodFlagsOffset); 173 } 174 175 /** 176 * Returns this method's constant method flags ({@code ConstMethod::_flags}). 177 * 178 * @return flags of this method's ConstMethod 179 */ 180 private int getConstMethodFlags() { 181 return UNSAFE.getChar(getConstMethod() + config().constMethodFlagsOffset); 182 } 183 184 @Override 185 public HotSpotResolvedObjectTypeImpl getDeclaringClass() { 186 return holder; 187 } 188 189 /** 190 * Gets the address of the C++ Method object for this method. 191 */ 192 public Constant getMetaspaceMethodConstant() { 193 return HotSpotMetaspaceConstantImpl.forMetaspaceObject(this, false); 194 } 195 196 public long getMetaspacePointer() { 197 return metaspaceMethod; 198 } 199 200 @Override 201 public Constant getEncoding() { 202 return getMetaspaceMethodConstant(); 203 } 204 205 /** 206 * Gets the complete set of modifiers for this method which includes the JVM specification 207 * modifiers as well as the HotSpot internal modifiers. 208 */ 209 public int getAllModifiers() { 210 return UNSAFE.getInt(metaspaceMethod + config().methodAccessFlagsOffset); 211 } 212 213 @Override 214 public int getModifiers() { 215 return getAllModifiers() & ModifiersProvider.jvmMethodModifiers(); 216 } 217 218 @Override 219 public boolean canBeStaticallyBound() { 220 return (isFinal() || isPrivate() || isStatic() || holder.isLeaf()) && isConcrete(); 221 } 222 223 @Override 224 public byte[] getCode() { 225 if (getCodeSize() == 0) { 226 return null; 227 } 228 if (code == null && holder.isLinked()) { 229 code = compilerToVM().getBytecode(this); 230 assert code.length == getCodeSize() : "expected: " + getCodeSize() + ", actual: " + code.length; 231 } 232 return code; 233 } 234 235 @Override 236 public int getCodeSize() { 237 return UNSAFE.getChar(getConstMethod() + config().constMethodCodeSizeOffset); 238 } 239 240 @Override 241 public ExceptionHandler[] getExceptionHandlers() { 242 final boolean hasExceptionTable = (getConstMethodFlags() & config().constMethodHasExceptionTable) != 0; 243 if (!hasExceptionTable) { 244 return new ExceptionHandler[0]; 245 } 246 247 HotSpotVMConfig config = config(); 248 final int exceptionTableLength = compilerToVM().getExceptionTableLength(this); 249 ExceptionHandler[] handlers = new ExceptionHandler[exceptionTableLength]; 250 long exceptionTableElement = compilerToVM().getExceptionTableStart(this); 251 252 for (int i = 0; i < exceptionTableLength; i++) { 253 final int startPc = UNSAFE.getChar(exceptionTableElement + config.exceptionTableElementStartPcOffset); 254 final int endPc = UNSAFE.getChar(exceptionTableElement + config.exceptionTableElementEndPcOffset); 255 final int handlerPc = UNSAFE.getChar(exceptionTableElement + config.exceptionTableElementHandlerPcOffset); 256 int catchTypeIndex = UNSAFE.getChar(exceptionTableElement + config.exceptionTableElementCatchTypeIndexOffset); 257 258 JavaType catchType; 259 if (catchTypeIndex == 0) { 260 catchType = null; 261 } else { 262 final int opcode = -1; // opcode is not used 263 catchType = constantPool.lookupType(catchTypeIndex, opcode); 264 265 // Check for Throwable which catches everything. 266 if (catchType instanceof HotSpotResolvedObjectTypeImpl) { 267 HotSpotResolvedObjectTypeImpl resolvedType = (HotSpotResolvedObjectTypeImpl) catchType; 268 if (resolvedType.mirror() == Throwable.class) { 269 catchTypeIndex = 0; 270 catchType = null; 271 } 272 } 273 } 274 handlers[i] = new ExceptionHandler(startPc, endPc, handlerPc, catchTypeIndex, catchType); 275 276 // Go to the next ExceptionTableElement 277 exceptionTableElement += config.exceptionTableElementSize; 278 } 279 280 return handlers; 281 } 282 283 /** 284 * Returns true if this method has a {@code CallerSensitive} annotation. 285 * 286 * @return true if CallerSensitive annotation present, false otherwise 287 */ 288 public boolean isCallerSensitive() { 289 return (getFlags() & config().methodFlagsCallerSensitive) != 0; 290 } 291 292 /** 293 * Returns true if this method has a {@code ForceInline} annotation. 294 * 295 * @return true if ForceInline annotation present, false otherwise 296 */ 297 public boolean isForceInline() { 298 return (getFlags() & config().methodFlagsForceInline) != 0; 299 } 300 301 /** 302 * Returns true if this method has a {@code DontInline} annotation. 303 * 304 * @return true if DontInline annotation present, false otherwise 305 */ 306 public boolean isDontInline() { 307 return (getFlags() & config().methodFlagsDontInline) != 0; 308 } 309 310 /** 311 * Manually adds a DontInline annotation to this method. 312 */ 313 public void setNotInlineable() { 314 compilerToVM().doNotInlineOrCompile(this); 315 } 316 317 /** 318 * Returns true if this method is one of the special methods that is ignored by security stack 319 * walks. 320 * 321 * @return true if special method ignored by security stack walks, false otherwise 322 */ 323 public boolean ignoredBySecurityStackWalk() { 324 return compilerToVM().methodIsIgnoredBySecurityStackWalk(this); 325 } 326 327 @Override 328 public boolean isClassInitializer() { 329 return "<clinit>".equals(name) && isStatic(); 330 } 331 332 @Override 333 public boolean isConstructor() { 334 return "<init>".equals(name) && !isStatic(); 335 } 336 337 @Override 338 public int getMaxLocals() { 339 if (isAbstract() || isNative()) { 340 return 0; 341 } 342 HotSpotVMConfig config = config(); 343 return UNSAFE.getChar(getConstMethod() + config.methodMaxLocalsOffset); 344 } 345 346 @Override 347 public int getMaxStackSize() { 348 if (isAbstract() || isNative()) { 349 return 0; 350 } 351 HotSpotVMConfig config = config(); 352 return config.extraStackEntries + UNSAFE.getChar(getConstMethod() + config.constMethodMaxStackOffset); 353 } 354 355 @Override 356 public StackTraceElement asStackTraceElement(int bci) { 357 if (bci < 0 || bci >= getCodeSize()) { 358 // HotSpot code can only construct stack trace elements for valid bcis 359 StackTraceElement ste = compilerToVM().getStackTraceElement(this, 0); 360 return new StackTraceElement(ste.getClassName(), ste.getMethodName(), ste.getFileName(), -1); 361 } 362 return compilerToVM().getStackTraceElement(this, bci); 363 } 364 365 public ResolvedJavaMethod uniqueConcreteMethod(HotSpotResolvedObjectType receiver) { 366 if (receiver.isInterface()) { 367 // Cannot trust interfaces. Because of: 368 // interface I { void foo(); } 369 // class A { public void foo() {} } 370 // class B extends A implements I { } 371 // class C extends B { public void foo() { } } 372 // class D extends B { } 373 // Would lead to identify C.foo() as the unique concrete method for I.foo() without 374 // seeing A.foo(). 375 return null; 376 } 377 if (this.isDefault()) { 378 // CHA for default methods doesn't work and may crash the VM 379 return null; 380 } 381 return compilerToVM().findUniqueConcreteMethod(((HotSpotResolvedObjectTypeImpl) receiver), this); 382 } 383 384 @Override 385 public HotSpotSignature getSignature() { 386 return signature; 387 } 388 389 /** 390 * Gets the value of {@code Method::_code}. 391 * 392 * @return the value of {@code Method::_code} 393 */ 394 private long getCompiledCode() { 395 HotSpotVMConfig config = config(); 396 return UNSAFE.getAddress(metaspaceMethod + config.methodCodeOffset); 397 } 398 399 /** 400 * Returns whether this method has compiled code. 401 * 402 * @return true if this method has compiled code, false otherwise 403 */ 404 public boolean hasCompiledCode() { 405 return getCompiledCode() != 0L; 406 } 407 408 /** 409 * @param level 410 * @return true if the currently installed code was generated at {@code level}. 411 */ 412 public boolean hasCompiledCodeAtLevel(int level) { 413 long compiledCode = getCompiledCode(); 414 if (compiledCode != 0) { 415 return UNSAFE.getInt(compiledCode + config().nmethodCompLevelOffset) == level; 416 } 417 return false; 418 } 419 420 private static final String TraceMethodDataFilter = System.getProperty("jvmci.traceMethodDataFilter"); 421 422 @Override 423 public ProfilingInfo getProfilingInfo(boolean includeNormal, boolean includeOSR) { 424 ProfilingInfo info; 425 426 if (methodData == null) { 427 long metaspaceMethodData = UNSAFE.getAddress(metaspaceMethod + config().methodDataOffset); 428 if (metaspaceMethodData != 0) { 429 methodData = new HotSpotMethodData(metaspaceMethodData, this); 430 if (TraceMethodDataFilter != null && this.format("%H.%n").contains(TraceMethodDataFilter)) { 431 System.out.println("Raw method data for " + this.format("%H.%n(%p)") + ":"); 432 System.out.println(methodData.toString()); 433 } 434 } 435 } 436 437 if (methodData == null || (!methodData.hasNormalData() && !methodData.hasExtraData())) { 438 // Be optimistic and return false for exceptionSeen. A methodDataOop is allocated in 439 // case of a deoptimization. 440 info = DefaultProfilingInfo.get(TriState.FALSE); 441 } else { 442 info = new HotSpotProfilingInfo(methodData, this, includeNormal, includeOSR); 443 } 444 return info; 445 } 446 447 @Override 448 public void reprofile() { 449 compilerToVM().reprofile(this); 450 } 451 452 @Override 453 public ConstantPool getConstantPool() { 454 return constantPool; 455 } 456 457 @Override 458 public Annotation[][] getParameterAnnotations() { 459 Executable javaMethod = toJava(); 460 return javaMethod == null ? null : javaMethod.getParameterAnnotations(); 461 } 462 463 @Override 464 public Annotation[] getAnnotations() { 465 Executable javaMethod = toJava(); 466 return javaMethod == null ? new Annotation[0] : javaMethod.getAnnotations(); 467 } 468 469 @Override 470 public <T extends Annotation> T getAnnotation(Class<T> annotationClass) { 471 Executable javaMethod = toJava(); 472 return javaMethod == null ? null : javaMethod.getAnnotation(annotationClass); 473 } 474 475 public boolean isDefault() { 476 if (isConstructor()) { 477 return false; 478 } 479 // Copied from java.lang.Method.isDefault() 480 int mask = Modifier.ABSTRACT | Modifier.PUBLIC | Modifier.STATIC; 481 return ((getModifiers() & mask) == Modifier.PUBLIC) && getDeclaringClass().isInterface(); 482 } 483 484 @Override 485 public Type[] getGenericParameterTypes() { 486 Executable javaMethod = toJava(); 487 return javaMethod == null ? null : javaMethod.getGenericParameterTypes(); 488 } 489 490 public Class<?>[] signatureToTypes() { 491 Signature sig = getSignature(); 492 int count = sig.getParameterCount(false); 493 Class<?>[] result = new Class<?>[count]; 494 for (int i = 0; i < result.length; ++i) { 495 JavaType parameterType = sig.getParameterType(i, holder); 496 HotSpotResolvedJavaType resolvedParameterType = (HotSpotResolvedJavaType) parameterType.resolve(holder); 497 result[i] = resolvedParameterType.mirror(); 498 } 499 return result; 500 } 501 502 private Executable toJava() { 503 if (toJavaCache != null) { 504 return toJavaCache; 505 } 506 try { 507 Class<?>[] parameterTypes = signatureToTypes(); 508 Executable result = isConstructor() ? holder.mirror().getDeclaredConstructor(parameterTypes) : holder.mirror().getDeclaredMethod(name, parameterTypes); 509 toJavaCache = result; 510 return result; 511 } catch (NoSuchMethodException | NoClassDefFoundError e) { 512 return null; 513 } 514 } 515 516 @Override 517 public boolean canBeInlined() { 518 if (isDontInline()) { 519 return false; 520 } 521 return compilerToVM().canInlineMethod(this); 522 } 523 524 @Override 525 public boolean shouldBeInlined() { 526 if (isForceInline()) { 527 return true; 528 } 529 return compilerToVM().shouldInlineMethod(this); 530 } 531 532 @Override 533 public LineNumberTable getLineNumberTable() { 534 final boolean hasLineNumberTable = (getConstMethodFlags() & config().constMethodHasLineNumberTable) != 0; 535 if (!hasLineNumberTable) { 536 return null; 537 } 538 539 long[] values = compilerToVM().getLineNumberTable(this); 540 if (values == null || values.length == 0) { 541 // Empty table so treat is as non-existent 542 return null; 543 } 544 assert values.length % 2 == 0; 545 int[] bci = new int[values.length / 2]; 546 int[] line = new int[values.length / 2]; 547 548 for (int i = 0; i < values.length / 2; i++) { 549 bci[i] = (int) values[i * 2]; 550 line[i] = (int) values[i * 2 + 1]; 551 } 552 553 return new LineNumberTableImpl(line, bci); 554 } 555 556 @Override 557 public LocalVariableTable getLocalVariableTable() { 558 final boolean hasLocalVariableTable = (getConstMethodFlags() & config().constMethodHasLocalVariableTable) != 0; 559 if (!hasLocalVariableTable) { 560 return null; 561 } 562 563 HotSpotVMConfig config = config(); 564 long localVariableTableElement = compilerToVM().getLocalVariableTableStart(this); 565 final int localVariableTableLength = compilerToVM().getLocalVariableTableLength(this); 566 Local[] locals = new Local[localVariableTableLength]; 567 568 for (int i = 0; i < localVariableTableLength; i++) { 569 final int startBci = UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementStartBciOffset); 570 final int endBci = startBci + UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementLengthOffset); 571 final int nameCpIndex = UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementNameCpIndexOffset); 572 final int typeCpIndex = UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementDescriptorCpIndexOffset); 573 final int slot = UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementSlotOffset); 574 575 String localName = getConstantPool().lookupUtf8(nameCpIndex); 576 String localType = getConstantPool().lookupUtf8(typeCpIndex); 577 578 locals[i] = new LocalImpl(localName, runtime().lookupType(localType, holder, false), startBci, endBci, slot); 579 580 // Go to the next LocalVariableTableElement 581 localVariableTableElement += config.localVariableTableElementSize; 582 } 583 584 return new LocalVariableTableImpl(locals); 585 } 586 587 /** 588 * Returns the offset of this method into the v-table. The method must have a v-table entry as 589 * indicated by {@link #isInVirtualMethodTable(ResolvedJavaType)}, otherwise an exception is 590 * thrown. 591 * 592 * @return the offset of this method into the v-table 593 */ 594 public int vtableEntryOffset(ResolvedJavaType resolved) { 595 if (!isInVirtualMethodTable(resolved)) { 596 throw new JVMCIError("%s does not have a vtable entry in type %s", this, resolved); 597 } 598 HotSpotVMConfig config = config(); 599 final int vtableIndex = getVtableIndex((HotSpotResolvedObjectTypeImpl) resolved); 600 return config.instanceKlassVtableStartOffset + vtableIndex * config.vtableEntrySize + config.vtableEntryMethodOffset; 601 } 602 603 @Override 604 public boolean isInVirtualMethodTable(ResolvedJavaType resolved) { 605 if (resolved instanceof HotSpotResolvedObjectTypeImpl) { 606 HotSpotResolvedObjectTypeImpl hotspotResolved = (HotSpotResolvedObjectTypeImpl) resolved; 607 int vtableIndex = getVtableIndex(hotspotResolved); 608 return vtableIndex >= 0 && vtableIndex < hotspotResolved.getVtableLength(); 609 } 610 return false; 611 } 612 613 private int getVtableIndex(HotSpotResolvedObjectTypeImpl resolved) { 614 if (!holder.isLinked()) { 615 return config().invalidVtableIndex; 616 } 617 if (holder.isInterface()) { 618 if (resolved.isInterface()) { 619 return config().invalidVtableIndex; 620 } 621 return getVtableIndexForInterfaceMethod(resolved); 622 } 623 return getVtableIndex(); 624 } 625 626 /** 627 * Returns this method's virtual table index. 628 * 629 * @return virtual table index 630 */ 631 private int getVtableIndex() { 632 assert !holder.isInterface(); 633 HotSpotVMConfig config = config(); 634 int result = UNSAFE.getInt(metaspaceMethod + config.methodVtableIndexOffset); 635 assert result >= config.nonvirtualVtableIndex : "must be linked"; 636 return result; 637 } 638 639 private int getVtableIndexForInterfaceMethod(ResolvedJavaType resolved) { 640 HotSpotResolvedObjectTypeImpl hotspotType = (HotSpotResolvedObjectTypeImpl) resolved; 641 return compilerToVM().getVtableIndexForInterfaceMethod(hotspotType, this); 642 } 643 644 /** 645 * The {@link SpeculationLog} for methods compiled by JVMCI hang off this per-declaring-type 646 * {@link ClassValue}. The raw Method* value is safe to use as a key in the map as a) it is 647 * never moves and b) we never read from it. 648 * <p> 649 * One implication is that we will preserve {@link SpeculationLog}s for methods that have been 650 * redefined via class redefinition. It's tempting to periodically flush such logs but we cannot 651 * read the JVM_ACC_IS_OBSOLETE bit (or anything else) via the raw pointer as obsoleted methods 652 * are subject to clean up and deletion (see InstanceKlass::purge_previous_versions_internal). 653 */ 654 private static final ClassValue<Map<Long, SpeculationLog>> SpeculationLogs = new ClassValue<Map<Long, SpeculationLog>>() { 655 @Override 656 protected Map<Long, SpeculationLog> computeValue(java.lang.Class<?> type) { 657 return new HashMap<>(4); 658 } 659 }; 660 661 public SpeculationLog getSpeculationLog() { 662 Map<Long, SpeculationLog> map = SpeculationLogs.get(holder.mirror()); 663 synchronized (map) { 664 SpeculationLog log = map.get(this.metaspaceMethod); 665 if (log == null) { 666 log = new HotSpotSpeculationLog(); 667 map.put(metaspaceMethod, log); 668 } 669 return log; 670 } 671 } 672 673 public int intrinsicId() { 674 HotSpotVMConfig config = config(); 675 return UNSAFE.getChar(metaspaceMethod + config.methodIntrinsicIdOffset); 676 } 677 678 @Override 679 public JavaConstant invoke(JavaConstant receiver, JavaConstant[] arguments) { 680 assert !isConstructor(); 681 Method javaMethod = (Method) toJava(); 682 javaMethod.setAccessible(true); 683 684 Object[] objArguments = new Object[arguments.length]; 685 for (int i = 0; i < arguments.length; i++) { 686 objArguments[i] = HotSpotObjectConstantImpl.asBoxedValue(arguments[i]); 687 } 688 Object objReceiver = receiver != null && !receiver.isNull() ? ((HotSpotObjectConstantImpl) receiver).object() : null; 689 690 try { 691 Object objResult = javaMethod.invoke(objReceiver, objArguments); 692 return javaMethod.getReturnType() == void.class ? null : HotSpotObjectConstantImpl.forBoxedValue(getSignature().getReturnKind(), objResult); 693 694 } catch (IllegalAccessException | InvocationTargetException ex) { 695 throw new IllegalArgumentException(ex); 696 } 697 } 698 699 /** 700 * Allocates a compile id for this method by asking the VM for one. 701 * 702 * @param entryBCI entry bci 703 * @return compile id 704 */ 705 public int allocateCompileId(int entryBCI) { 706 return compilerToVM().allocateCompileId(this, entryBCI); 707 } 708 709 public boolean hasCodeAtLevel(int entryBCI, int level) { 710 if (entryBCI == config().invocationEntryBci) { 711 return hasCompiledCodeAtLevel(level); 712 } 713 return compilerToVM().hasCompiledCodeForOSR(this, entryBCI, level); 714 } 715 }