1 /* 2 * Copyright (c) 2012, 2019, 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 24 25 package org.graalvm.compiler.hotspot.replacements; 26 27 import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfigBase.INJECTED_METAACCESS; 28 import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfigBase.INJECTED_VMCONFIG; 29 import static org.graalvm.compiler.hotspot.meta.HotSpotForeignCallsProviderImpl.VERIFY_OOP; 30 31 import java.lang.ref.Reference; 32 33 import org.graalvm.compiler.api.replacements.Fold; 34 import org.graalvm.compiler.api.replacements.Fold.InjectedParameter; 35 import org.graalvm.compiler.core.common.SuppressFBWarnings; 36 import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor; 37 import org.graalvm.compiler.core.common.type.ObjectStamp; 38 import org.graalvm.compiler.core.common.type.TypeReference; 39 import org.graalvm.compiler.debug.GraalError; 40 import org.graalvm.compiler.graph.Node.ConstantNodeParameter; 41 import org.graalvm.compiler.graph.Node.NodeIntrinsic; 42 import org.graalvm.compiler.graph.spi.CanonicalizerTool; 43 import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig; 44 import org.graalvm.compiler.hotspot.word.KlassPointer; 45 import org.graalvm.compiler.nodes.CanonicalizableLocation; 46 import org.graalvm.compiler.nodes.CompressionNode; 47 import org.graalvm.compiler.nodes.ComputeObjectAddressNode; 48 import org.graalvm.compiler.nodes.ConstantNode; 49 import org.graalvm.compiler.nodes.NamedLocationIdentity; 50 import org.graalvm.compiler.nodes.NodeView; 51 import org.graalvm.compiler.nodes.ValueNode; 52 import org.graalvm.compiler.nodes.extended.ForeignCallNode; 53 import org.graalvm.compiler.nodes.extended.LoadHubNode; 54 import org.graalvm.compiler.nodes.extended.RawLoadNode; 55 import org.graalvm.compiler.nodes.extended.StoreHubNode; 56 import org.graalvm.compiler.nodes.graphbuilderconf.IntrinsicContext; 57 import org.graalvm.compiler.nodes.memory.Access; 58 import org.graalvm.compiler.nodes.memory.address.AddressNode; 59 import org.graalvm.compiler.nodes.memory.address.OffsetAddressNode; 60 import org.graalvm.compiler.nodes.type.StampTool; 61 import org.graalvm.compiler.replacements.ReplacementsUtil; 62 import org.graalvm.compiler.replacements.nodes.ReadRegisterNode; 63 import org.graalvm.compiler.replacements.nodes.WriteRegisterNode; 64 import org.graalvm.compiler.word.Word; 65 import jdk.internal.vm.compiler.word.LocationIdentity; 66 import jdk.internal.vm.compiler.word.WordFactory; 67 68 import jdk.vm.ci.code.Register; 69 import jdk.vm.ci.hotspot.HotSpotJVMCIRuntime; 70 import jdk.vm.ci.hotspot.HotSpotMetaspaceConstant; 71 import jdk.vm.ci.hotspot.HotSpotResolvedObjectType; 72 import jdk.vm.ci.meta.Assumptions; 73 import jdk.vm.ci.meta.Assumptions.AssumptionResult; 74 import jdk.vm.ci.meta.JavaKind; 75 import jdk.vm.ci.meta.MetaAccessProvider; 76 import jdk.vm.ci.meta.ResolvedJavaField; 77 import jdk.vm.ci.meta.ResolvedJavaType; 78 import jdk.vm.ci.meta.UnresolvedJavaType; 79 80 //JaCoCo Exclude 81 82 /** 83 * A collection of methods used in HotSpot snippets, substitutions and stubs. 84 */ 85 public class HotSpotReplacementsUtil { 86 87 abstract static class HotSpotOptimizingLocationIdentity extends NamedLocationIdentity implements CanonicalizableLocation { 88 89 HotSpotOptimizingLocationIdentity(String name) { 90 super(name, true); 91 } 92 93 @Override 94 public abstract ValueNode canonicalizeRead(ValueNode read, AddressNode location, ValueNode object, CanonicalizerTool tool); 95 96 protected ValueNode findReadHub(ValueNode object) { 97 ValueNode base = object; 98 if (base instanceof CompressionNode) { 99 base = ((CompressionNode) base).getValue(); 100 } 101 if (base instanceof Access) { 102 Access access = (Access) base; 103 if (access.getLocationIdentity().equals(HUB_LOCATION) || access.getLocationIdentity().equals(COMPRESSED_HUB_LOCATION)) { 104 AddressNode address = access.getAddress(); 105 if (address instanceof OffsetAddressNode) { 106 OffsetAddressNode offset = (OffsetAddressNode) address; 107 return offset.getBase(); 108 } 109 } 110 } else if (base instanceof LoadHubNode) { 111 LoadHubNode loadhub = (LoadHubNode) base; 112 return loadhub.getValue(); 113 } 114 return null; 115 } 116 117 /** 118 * Fold reads that convert from Class -> Hub -> Class or vice versa. 119 * 120 * @param read 121 * @param object 122 * @param otherLocation 123 * @return an earlier read or the original {@code read} 124 */ 125 protected static ValueNode foldIndirection(ValueNode read, ValueNode object, LocationIdentity otherLocation) { 126 if (object instanceof Access) { 127 Access access = (Access) object; 128 if (access.getLocationIdentity().equals(otherLocation)) { 129 AddressNode address = access.getAddress(); 130 if (address instanceof OffsetAddressNode) { 131 OffsetAddressNode offset = (OffsetAddressNode) address; 132 assert offset.getBase().stamp(NodeView.DEFAULT).isCompatible(read.stamp(NodeView.DEFAULT)); 133 return offset.getBase(); 134 } 135 } 136 } 137 return read; 138 } 139 } 140 141 @Fold 142 public static ResolvedJavaType methodHolderClass(@InjectedParameter IntrinsicContext context) { 143 return context.getOriginalMethod().getDeclaringClass(); 144 } 145 146 @Fold 147 static ResolvedJavaType getType(@Fold.InjectedParameter IntrinsicContext context, String typeName) { 148 try { 149 UnresolvedJavaType unresolved = UnresolvedJavaType.create(typeName); 150 return unresolved.resolve(methodHolderClass(context)); 151 } catch (LinkageError e) { 152 throw new GraalError(e); 153 } 154 } 155 156 @Fold 157 static int getFieldOffset(ResolvedJavaType type, String fieldName) { 158 for (ResolvedJavaField field : type.getInstanceFields(true)) { 159 if (field.getName().equals(fieldName)) { 160 return field.getOffset(); 161 } 162 } 163 throw new GraalError("missing field " + fieldName + " in type " + type); 164 } 165 166 public static HotSpotJVMCIRuntime runtime() { 167 return HotSpotJVMCIRuntime.runtime(); 168 } 169 170 @Fold 171 public static int getHeapWordSize(@InjectedParameter GraalHotSpotVMConfig injectedVMConfig) { 172 return injectedVMConfig.heapWordSize; 173 } 174 175 @Fold 176 public static int klassLayoutHelperNeutralValue(@InjectedParameter GraalHotSpotVMConfig config) { 177 return config.klassLayoutHelperNeutralValue; 178 } 179 180 @Fold 181 public static boolean useTLAB(@InjectedParameter GraalHotSpotVMConfig config) { 182 return config.useTLAB; 183 } 184 185 @Fold 186 public static boolean verifyOops(@InjectedParameter GraalHotSpotVMConfig config) { 187 return config.verifyOops; 188 } 189 190 public static final LocationIdentity EXCEPTION_OOP_LOCATION = NamedLocationIdentity.mutable("ExceptionOop"); 191 192 /** 193 * @see GraalHotSpotVMConfig#threadExceptionOopOffset 194 */ 195 @Fold 196 public static int threadExceptionOopOffset(@InjectedParameter GraalHotSpotVMConfig config) { 197 return config.threadExceptionOopOffset; 198 } 199 200 public static final LocationIdentity EXCEPTION_PC_LOCATION = NamedLocationIdentity.mutable("ExceptionPc"); 201 202 @Fold 203 public static int threadExceptionPcOffset(@InjectedParameter GraalHotSpotVMConfig config) { 204 return config.threadExceptionPcOffset; 205 } 206 207 public static final LocationIdentity TLAB_TOP_LOCATION = NamedLocationIdentity.mutable("TlabTop"); 208 209 @Fold 210 public static int threadTlabTopOffset(@InjectedParameter GraalHotSpotVMConfig config) { 211 return config.threadTlabTopOffset(); 212 } 213 214 public static final LocationIdentity TLAB_END_LOCATION = NamedLocationIdentity.mutable("TlabEnd"); 215 216 @Fold 217 static int threadTlabEndOffset(@InjectedParameter GraalHotSpotVMConfig config) { 218 return config.threadTlabEndOffset(); 219 } 220 221 public static final LocationIdentity PENDING_EXCEPTION_LOCATION = NamedLocationIdentity.mutable("PendingException"); 222 223 /** 224 * @see GraalHotSpotVMConfig#pendingExceptionOffset 225 */ 226 @Fold 227 static int threadPendingExceptionOffset(@InjectedParameter GraalHotSpotVMConfig config) { 228 return config.pendingExceptionOffset; 229 } 230 231 /** 232 * @see GraalHotSpotVMConfig#threadExceptionOopOffset 233 */ 234 public static Object readExceptionOop(Word thread) { 235 return thread.readObject(threadExceptionOopOffset(INJECTED_VMCONFIG), EXCEPTION_OOP_LOCATION); 236 } 237 238 public static Word readExceptionPc(Word thread) { 239 return thread.readWord(threadExceptionPcOffset(INJECTED_VMCONFIG), EXCEPTION_PC_LOCATION); 240 } 241 242 /** 243 * @see GraalHotSpotVMConfig#threadExceptionOopOffset 244 */ 245 public static void writeExceptionOop(Word thread, Object value) { 246 thread.writeObject(threadExceptionOopOffset(INJECTED_VMCONFIG), value, EXCEPTION_OOP_LOCATION); 247 } 248 249 public static void writeExceptionPc(Word thread, Word value) { 250 thread.writeWord(threadExceptionPcOffset(INJECTED_VMCONFIG), value, EXCEPTION_PC_LOCATION); 251 } 252 253 public static Word readTlabTop(Word thread) { 254 return thread.readWord(threadTlabTopOffset(INJECTED_VMCONFIG), TLAB_TOP_LOCATION); 255 } 256 257 public static Word readTlabEnd(Word thread) { 258 return thread.readWord(threadTlabEndOffset(INJECTED_VMCONFIG), TLAB_END_LOCATION); 259 } 260 261 public static void writeTlabTop(Word thread, Word top) { 262 thread.writeWord(threadTlabTopOffset(INJECTED_VMCONFIG), top, TLAB_TOP_LOCATION); 263 } 264 265 /** 266 * Clears the pending exception for the given thread. 267 * 268 * @return the pending exception, or null if there was none 269 */ 270 @SuppressFBWarnings(value = "NP_NULL_PARAM_DEREF_NONVIRTUAL", justification = "foldable method parameters are injected") 271 public static Object clearPendingException(Word thread) { 272 Object result = thread.readObject(threadPendingExceptionOffset(INJECTED_VMCONFIG), PENDING_EXCEPTION_LOCATION); 273 thread.writeObject(threadPendingExceptionOffset(INJECTED_VMCONFIG), null, PENDING_EXCEPTION_LOCATION); 274 return result; 275 } 276 277 /** 278 * Gets the pending exception for the given thread. 279 * 280 * @return the pending exception, or null if there was none 281 */ 282 @SuppressFBWarnings(value = "NP_NULL_PARAM_DEREF_NONVIRTUAL", justification = "foldable method parameters are injected") 283 public static Object getPendingException(Word thread) { 284 return thread.readObject(threadPendingExceptionOffset(INJECTED_VMCONFIG), PENDING_EXCEPTION_LOCATION); 285 } 286 287 /* 288 * As far as Java code is concerned this can be considered immutable: it is set just after the 289 * JavaThread is created, before it is published. After that, it is never changed. 290 */ 291 public static final LocationIdentity JAVA_THREAD_THREAD_OBJECT_LOCATION = NamedLocationIdentity.immutable("JavaThread::_threadObj"); 292 293 @Fold 294 public static int threadObjectOffset(@InjectedParameter GraalHotSpotVMConfig config) { 295 return config.threadObjectOffset; 296 } 297 298 public static final LocationIdentity JAVA_THREAD_OSTHREAD_LOCATION = NamedLocationIdentity.mutable("JavaThread::_osthread"); 299 300 @Fold 301 public static int osThreadOffset(@InjectedParameter GraalHotSpotVMConfig config) { 302 return config.osThreadOffset; 303 } 304 305 @Fold 306 public static int osThreadInterruptedOffset(@InjectedParameter GraalHotSpotVMConfig config) { 307 return config.osThreadInterruptedOffset; 308 } 309 310 @Fold 311 public static JavaKind getWordKind() { 312 return runtime().getHostJVMCIBackend().getCodeCache().getTarget().wordJavaKind; 313 } 314 315 @Fold 316 public static int wordSize() { 317 return runtime().getHostJVMCIBackend().getCodeCache().getTarget().wordSize; 318 } 319 320 @Fold 321 public static int pageSize(@InjectedParameter GraalHotSpotVMConfig config) { 322 return config.vmPageSize; 323 } 324 325 public static final LocationIdentity PROTOTYPE_MARK_WORD_LOCATION = NamedLocationIdentity.mutable("PrototypeMarkWord"); 326 327 @Fold 328 public static int prototypeMarkWordOffset(@InjectedParameter GraalHotSpotVMConfig config) { 329 return config.prototypeMarkWordOffset; 330 } 331 332 public static final LocationIdentity KLASS_ACCESS_FLAGS_LOCATION = NamedLocationIdentity.immutable("Klass::_access_flags"); 333 334 @Fold 335 public static int klassAccessFlagsOffset(@InjectedParameter GraalHotSpotVMConfig config) { 336 return config.klassAccessFlagsOffset; 337 } 338 339 @Fold 340 public static int jvmAccWrittenFlags(@InjectedParameter GraalHotSpotVMConfig config) { 341 return config.jvmAccWrittenFlags; 342 } 343 344 public static final LocationIdentity KLASS_LAYOUT_HELPER_LOCATION = new HotSpotOptimizingLocationIdentity("Klass::_layout_helper") { 345 @Override 346 public ValueNode canonicalizeRead(ValueNode read, AddressNode location, ValueNode object, CanonicalizerTool tool) { 347 ValueNode javaObject = findReadHub(object); 348 if (javaObject != null) { 349 if (javaObject.stamp(NodeView.DEFAULT) instanceof ObjectStamp) { 350 ObjectStamp stamp = (ObjectStamp) javaObject.stamp(NodeView.DEFAULT); 351 HotSpotResolvedObjectType type = (HotSpotResolvedObjectType) stamp.javaType(tool.getMetaAccess()); 352 if (type.isArray() && !type.getComponentType().isPrimitive()) { 353 int layout = type.layoutHelper(); 354 return ConstantNode.forInt(layout); 355 } 356 } 357 } 358 return read; 359 } 360 }; 361 362 @Fold 363 public static int allocatePrefetchStyle(@InjectedParameter GraalHotSpotVMConfig config) { 364 return config.allocatePrefetchStyle; 365 } 366 367 @Fold 368 public static int allocatePrefetchLines(@InjectedParameter GraalHotSpotVMConfig config) { 369 return config.allocatePrefetchLines; 370 } 371 372 @Fold 373 public static int allocatePrefetchDistance(@InjectedParameter GraalHotSpotVMConfig config) { 374 return config.allocatePrefetchDistance; 375 } 376 377 @Fold 378 public static int allocateInstancePrefetchLines(@InjectedParameter GraalHotSpotVMConfig config) { 379 return config.allocateInstancePrefetchLines; 380 } 381 382 @Fold 383 public static int allocatePrefetchStepSize(@InjectedParameter GraalHotSpotVMConfig config) { 384 return config.allocatePrefetchStepSize; 385 } 386 387 @Fold 388 public static int invocationCounterIncrement(@InjectedParameter GraalHotSpotVMConfig config) { 389 return config.invocationCounterIncrement; 390 } 391 392 @Fold 393 public static int invocationCounterOffset(@InjectedParameter GraalHotSpotVMConfig config) { 394 return config.invocationCounterOffset; 395 } 396 397 @Fold 398 public static int backedgeCounterOffset(@InjectedParameter GraalHotSpotVMConfig config) { 399 return config.backedgeCounterOffset; 400 } 401 402 @Fold 403 public static int invocationCounterShift(@InjectedParameter GraalHotSpotVMConfig config) { 404 return config.invocationCounterShift; 405 } 406 407 @Fold 408 public static int stackBias(@InjectedParameter GraalHotSpotVMConfig config) { 409 return config.stackBias; 410 } 411 412 @NodeIntrinsic(value = KlassLayoutHelperNode.class) 413 public static native int readLayoutHelper(KlassPointer object); 414 415 /** 416 * Checks if class {@code klass} is an array. 417 * 418 * See: Klass::layout_helper_is_array 419 * 420 * @param klassNonNull the class to be checked 421 * @return true if klassNonNull is an array, false otherwise 422 */ 423 public static boolean klassIsArray(KlassPointer klassNonNull) { 424 /* 425 * The less-than check only works if both values are ints. We use local variables to make 426 * sure these are still ints and haven't changed. 427 */ 428 final int layoutHelper = readLayoutHelper(klassNonNull); 429 final int layoutHelperNeutralValue = klassLayoutHelperNeutralValue(INJECTED_VMCONFIG); 430 return (layoutHelper < layoutHelperNeutralValue); 431 } 432 433 public static final LocationIdentity ARRAY_KLASS_COMPONENT_MIRROR = NamedLocationIdentity.immutable("ArrayKlass::_component_mirror"); 434 435 @Fold 436 public static int arrayKlassComponentMirrorOffset(@InjectedParameter GraalHotSpotVMConfig config) { 437 return config.getFieldOffset("ArrayKlass::_component_mirror", Integer.class, "oop"); 438 } 439 440 public static final LocationIdentity KLASS_SUPER_KLASS_LOCATION = NamedLocationIdentity.immutable("Klass::_super"); 441 442 @Fold 443 public static int klassSuperKlassOffset(@InjectedParameter GraalHotSpotVMConfig config) { 444 return config.klassSuperKlassOffset; 445 } 446 447 public static final LocationIdentity MARK_WORD_LOCATION = NamedLocationIdentity.mutable("MarkWord"); 448 449 @Fold 450 public static int markOffset(@InjectedParameter GraalHotSpotVMConfig config) { 451 return config.markOffset; 452 } 453 454 public static final LocationIdentity HUB_WRITE_LOCATION = NamedLocationIdentity.mutable("Hub:write"); 455 456 public static final LocationIdentity HUB_LOCATION = new HotSpotOptimizingLocationIdentity("Hub") { 457 @Override 458 public ValueNode canonicalizeRead(ValueNode read, AddressNode location, ValueNode object, CanonicalizerTool tool) { 459 TypeReference constantType = StampTool.typeReferenceOrNull(object); 460 if (constantType != null && constantType.isExact()) { 461 return ConstantNode.forConstant(read.stamp(NodeView.DEFAULT), tool.getConstantReflection().asObjectHub(constantType.getType()), tool.getMetaAccess()); 462 } 463 return read; 464 } 465 }; 466 467 public static final LocationIdentity COMPRESSED_HUB_LOCATION = new HotSpotOptimizingLocationIdentity("CompressedHub") { 468 @Override 469 public ValueNode canonicalizeRead(ValueNode read, AddressNode location, ValueNode object, CanonicalizerTool tool) { 470 TypeReference constantType = StampTool.typeReferenceOrNull(object); 471 if (constantType != null && constantType.isExact()) { 472 return ConstantNode.forConstant(read.stamp(NodeView.DEFAULT), ((HotSpotMetaspaceConstant) tool.getConstantReflection().asObjectHub(constantType.getType())).compress(), 473 tool.getMetaAccess()); 474 } 475 return read; 476 } 477 }; 478 479 @Fold 480 static int hubOffset(@InjectedParameter GraalHotSpotVMConfig config) { 481 return config.hubOffset; 482 } 483 484 public static void initializeObjectHeader(Word memory, Word markWord, KlassPointer hub) { 485 memory.writeWord(markOffset(INJECTED_VMCONFIG), markWord, MARK_WORD_LOCATION); 486 StoreHubNode.write(memory, hub); 487 } 488 489 @Fold 490 public static int unlockedMask(@InjectedParameter GraalHotSpotVMConfig config) { 491 return config.unlockedMask; 492 } 493 494 @Fold 495 public static int monitorMask(@InjectedParameter GraalHotSpotVMConfig config) { 496 return config.monitorMask; 497 } 498 499 @Fold 500 public static int objectMonitorOwnerOffset(@InjectedParameter GraalHotSpotVMConfig config) { 501 return config.objectMonitorOwner; 502 } 503 504 @Fold 505 public static int objectMonitorRecursionsOffset(@InjectedParameter GraalHotSpotVMConfig config) { 506 return config.objectMonitorRecursions; 507 } 508 509 @Fold 510 public static int objectMonitorCxqOffset(@InjectedParameter GraalHotSpotVMConfig config) { 511 return config.objectMonitorCxq; 512 } 513 514 @Fold 515 public static int objectMonitorEntryListOffset(@InjectedParameter GraalHotSpotVMConfig config) { 516 return config.objectMonitorEntryList; 517 } 518 519 /** 520 * Mask for a biasable, locked or unlocked mark word. 521 * 522 * <pre> 523 * +----------------------------------+-+-+ 524 * | 1|1|1| 525 * +----------------------------------+-+-+ 526 * </pre> 527 * 528 */ 529 @Fold 530 public static int biasedLockMaskInPlace(@InjectedParameter GraalHotSpotVMConfig config) { 531 return config.biasedLockMaskInPlace; 532 } 533 534 @Fold 535 public static int epochMaskInPlace(@InjectedParameter GraalHotSpotVMConfig config) { 536 return config.epochMaskInPlace; 537 } 538 539 /** 540 * Pattern for a biasable, unlocked mark word. 541 * 542 * <pre> 543 * +----------------------------------+-+-+ 544 * | 1|0|1| 545 * +----------------------------------+-+-+ 546 * </pre> 547 * 548 */ 549 @Fold 550 public static int biasedLockPattern(@InjectedParameter GraalHotSpotVMConfig config) { 551 return config.biasedLockPattern; 552 } 553 554 @Fold 555 public static int ageMaskInPlace(@InjectedParameter GraalHotSpotVMConfig config) { 556 return config.ageMaskInPlace; 557 } 558 559 @Fold 560 public static int metaspaceArrayLengthOffset(@InjectedParameter GraalHotSpotVMConfig config) { 561 return config.metaspaceArrayLengthOffset; 562 } 563 564 @Fold 565 public static int metaspaceArrayBaseOffset(@InjectedParameter GraalHotSpotVMConfig config) { 566 return config.metaspaceArrayBaseOffset; 567 } 568 569 @Fold 570 public static int arrayLengthOffset(@InjectedParameter GraalHotSpotVMConfig config) { 571 return config.arrayOopDescLengthOffset(); 572 } 573 574 public static Word arrayStart(int[] a) { 575 return WordFactory.unsigned(ComputeObjectAddressNode.get(a, ReplacementsUtil.getArrayBaseOffset(INJECTED_METAACCESS, JavaKind.Int))); 576 } 577 578 /** 579 * Idiom for making {@link GraalHotSpotVMConfig} a constant. 580 */ 581 @Fold 582 public static int objectAlignment(@InjectedParameter GraalHotSpotVMConfig config) { 583 return config.objectAlignment; 584 } 585 586 /** 587 * Calls {@link #arrayAllocationSize(int, int, int, int)} using an injected VM configuration 588 * object. 589 */ 590 public static long arrayAllocationSize(int length, int headerSize, int log2ElementSize) { 591 return arrayAllocationSize(length, headerSize, log2ElementSize, objectAlignment(INJECTED_VMCONFIG)); 592 } 593 594 /** 595 * Computes the size of the memory chunk allocated for an array. This size accounts for the 596 * array header size, body size and any padding after the last element to satisfy object 597 * alignment requirements. 598 * 599 * @param length the number of elements in the array 600 * @param headerSize the size of the array header 601 * @param log2ElementSize log2 of the size of an element in the array 602 * @param alignment the {@linkplain GraalHotSpotVMConfig#objectAlignment object alignment 603 * requirement} 604 * @return the size of the memory chunk 605 */ 606 public static long arrayAllocationSize(int length, int headerSize, int log2ElementSize, int alignment) { 607 long size = ((long) length << log2ElementSize) + headerSize + (alignment - 1); 608 long mask = ~(alignment - 1); 609 return size & mask; 610 } 611 612 @Fold 613 public static int instanceHeaderSize(@InjectedParameter GraalHotSpotVMConfig config) { 614 return config.useCompressedClassPointers ? (2 * wordSize()) - 4 : 2 * wordSize(); 615 } 616 617 @Fold 618 public static byte dirtyCardValue(@InjectedParameter GraalHotSpotVMConfig config) { 619 return config.dirtyCardValue; 620 } 621 622 @Fold 623 public static byte g1YoungCardValue(@InjectedParameter GraalHotSpotVMConfig config) { 624 return config.g1YoungCardValue; 625 } 626 627 @Fold 628 public static int cardTableShift(@InjectedParameter GraalHotSpotVMConfig config) { 629 return config.cardtableShift; 630 } 631 632 @Fold 633 public static int g1CardQueueIndexOffset(@InjectedParameter GraalHotSpotVMConfig config) { 634 return config.g1CardQueueIndexOffset; 635 } 636 637 @Fold 638 public static int g1CardQueueBufferOffset(@InjectedParameter GraalHotSpotVMConfig config) { 639 return config.g1CardQueueBufferOffset; 640 } 641 642 @Fold 643 public static int g1SATBQueueMarkingOffset(@InjectedParameter GraalHotSpotVMConfig config) { 644 return config.g1SATBQueueMarkingOffset; 645 } 646 647 @Fold 648 public static int g1SATBQueueIndexOffset(@InjectedParameter GraalHotSpotVMConfig config) { 649 return config.g1SATBQueueIndexOffset; 650 } 651 652 @Fold 653 public static int g1SATBQueueBufferOffset(@InjectedParameter GraalHotSpotVMConfig config) { 654 return config.g1SATBQueueBufferOffset; 655 } 656 657 public static final LocationIdentity KLASS_SUPER_CHECK_OFFSET_LOCATION = NamedLocationIdentity.immutable("Klass::_super_check_offset"); 658 659 @Fold 660 public static int superCheckOffsetOffset(@InjectedParameter GraalHotSpotVMConfig config) { 661 return config.superCheckOffsetOffset; 662 } 663 664 public static final LocationIdentity SECONDARY_SUPER_CACHE_LOCATION = NamedLocationIdentity.mutable("SecondarySuperCache"); 665 666 @Fold 667 public static int secondarySuperCacheOffset(@InjectedParameter GraalHotSpotVMConfig config) { 668 return config.secondarySuperCacheOffset; 669 } 670 671 public static final LocationIdentity SECONDARY_SUPERS_LOCATION = NamedLocationIdentity.immutable("SecondarySupers"); 672 673 @Fold 674 public static int secondarySupersOffset(@InjectedParameter GraalHotSpotVMConfig config) { 675 return config.secondarySupersOffset; 676 } 677 678 public static final LocationIdentity DISPLACED_MARK_WORD_LOCATION = NamedLocationIdentity.mutable("DisplacedMarkWord"); 679 680 public static final LocationIdentity OBJECT_MONITOR_OWNER_LOCATION = NamedLocationIdentity.mutable("ObjectMonitor::_owner"); 681 682 public static final LocationIdentity OBJECT_MONITOR_RECURSION_LOCATION = NamedLocationIdentity.mutable("ObjectMonitor::_recursions"); 683 684 public static final LocationIdentity OBJECT_MONITOR_CXQ_LOCATION = NamedLocationIdentity.mutable("ObjectMonitor::_cxq"); 685 686 public static final LocationIdentity OBJECT_MONITOR_ENTRY_LIST_LOCATION = NamedLocationIdentity.mutable("ObjectMonitor::_EntryList"); 687 688 @Fold 689 public static int lockDisplacedMarkOffset(@InjectedParameter GraalHotSpotVMConfig config) { 690 return config.basicLockDisplacedHeaderOffset; 691 } 692 693 @Fold 694 public static boolean useBiasedLocking(@InjectedParameter GraalHotSpotVMConfig config) { 695 return config.useBiasedLocking; 696 } 697 698 @Fold 699 static int uninitializedIdentityHashCodeValue(@InjectedParameter GraalHotSpotVMConfig config) { 700 return config.uninitializedIdentityHashCodeValue; 701 } 702 703 @Fold 704 static int identityHashCodeShift(@InjectedParameter GraalHotSpotVMConfig config) { 705 return config.identityHashCodeShift; 706 } 707 708 /** 709 * Loads the hub of an object (without null checking it first). 710 */ 711 public static KlassPointer loadHub(Object object) { 712 return loadHubIntrinsic(object); 713 } 714 715 public static Object verifyOop(Object object) { 716 if (verifyOops(INJECTED_VMCONFIG)) { 717 verifyOopStub(VERIFY_OOP, object); 718 } 719 return object; 720 } 721 722 @NodeIntrinsic(ForeignCallNode.class) 723 private static native Object verifyOopStub(@ConstantNodeParameter ForeignCallDescriptor descriptor, Object object); 724 725 public static Word loadWordFromObject(Object object, int offset) { 726 ReplacementsUtil.staticAssert(offset != hubOffset(INJECTED_VMCONFIG), "Use loadHubIntrinsic instead of loadWordFromObject"); 727 return loadWordFromObjectIntrinsic(object, offset, LocationIdentity.any(), getWordKind()); 728 } 729 730 public static Word loadWordFromObject(Object object, int offset, LocationIdentity identity) { 731 ReplacementsUtil.staticAssert(offset != hubOffset(INJECTED_VMCONFIG), "Use loadHubIntrinsic instead of loadWordFromObject"); 732 return loadWordFromObjectIntrinsic(object, offset, identity, getWordKind()); 733 } 734 735 public static KlassPointer loadKlassFromObject(Object object, int offset, LocationIdentity identity) { 736 ReplacementsUtil.staticAssert(offset != hubOffset(INJECTED_VMCONFIG), "Use loadHubIntrinsic instead of loadKlassFromObject"); 737 return loadKlassFromObjectIntrinsic(object, offset, identity, getWordKind()); 738 } 739 740 /** 741 * Reads the value of a given register. 742 * 743 * @param register a register which must not be available to the register allocator 744 * @return the value of {@code register} as a word 745 */ 746 public static Word registerAsWord(@ConstantNodeParameter Register register) { 747 return registerAsWord(register, true, false); 748 } 749 750 @NodeIntrinsic(value = ReadRegisterNode.class) 751 public static native Word registerAsWord(@ConstantNodeParameter Register register, @ConstantNodeParameter boolean directUse, @ConstantNodeParameter boolean incoming); 752 753 @NodeIntrinsic(value = WriteRegisterNode.class) 754 public static native void writeRegisterAsWord(@ConstantNodeParameter Register register, Word value); 755 756 @NodeIntrinsic(value = RawLoadNode.class) 757 private static native Word loadWordFromObjectIntrinsic(Object object, long offset, @ConstantNodeParameter LocationIdentity locationIdentity, @ConstantNodeParameter JavaKind wordKind); 758 759 @NodeIntrinsic(value = RawLoadNode.class) 760 private static native KlassPointer loadKlassFromObjectIntrinsic(Object object, long offset, @ConstantNodeParameter LocationIdentity locationIdentity, @ConstantNodeParameter JavaKind wordKind); 761 762 @NodeIntrinsic(value = LoadHubNode.class) 763 public static native KlassPointer loadHubIntrinsic(Object object); 764 765 public static final LocationIdentity CLASS_STATE_LOCATION = NamedLocationIdentity.mutable("ClassState"); 766 767 @Fold 768 public static int instanceKlassInitStateOffset(@InjectedParameter GraalHotSpotVMConfig config) { 769 return config.instanceKlassInitStateOffset; 770 } 771 772 @Fold 773 public static int instanceKlassStateFullyInitialized(@InjectedParameter GraalHotSpotVMConfig config) { 774 return config.instanceKlassStateFullyInitialized; 775 } 776 777 /** 778 * 779 * @param hub the hub of an InstanceKlass 780 * @return true is the InstanceKlass represented by hub is fully initialized 781 */ 782 public static boolean isInstanceKlassFullyInitialized(KlassPointer hub) { 783 return readInstanceKlassState(hub) == instanceKlassStateFullyInitialized(INJECTED_VMCONFIG); 784 } 785 786 private static byte readInstanceKlassState(KlassPointer hub) { 787 return hub.readByte(instanceKlassInitStateOffset(INJECTED_VMCONFIG), CLASS_STATE_LOCATION); 788 } 789 790 public static final LocationIdentity KLASS_MODIFIER_FLAGS_LOCATION = NamedLocationIdentity.immutable("Klass::_modifier_flags"); 791 792 @Fold 793 public static int klassModifierFlagsOffset(@InjectedParameter GraalHotSpotVMConfig config) { 794 return config.klassModifierFlagsOffset; 795 } 796 797 public static final LocationIdentity CLASS_KLASS_LOCATION = new HotSpotOptimizingLocationIdentity("Class._klass") { 798 @Override 799 public ValueNode canonicalizeRead(ValueNode read, AddressNode location, ValueNode object, CanonicalizerTool tool) { 800 return foldIndirection(read, object, CLASS_MIRROR_LOCATION); 801 } 802 }; 803 804 public static final LocationIdentity CLASS_ARRAY_KLASS_LOCATION = new HotSpotOptimizingLocationIdentity("Class._array_klass") { 805 @Override 806 public ValueNode canonicalizeRead(ValueNode read, AddressNode location, ValueNode object, CanonicalizerTool tool) { 807 return foldIndirection(read, object, ARRAY_KLASS_COMPONENT_MIRROR); 808 } 809 }; 810 811 @Fold 812 public static int arrayKlassOffset(@InjectedParameter GraalHotSpotVMConfig config) { 813 return config.arrayKlassOffset; 814 } 815 816 public static final LocationIdentity CLASS_MIRROR_LOCATION = NamedLocationIdentity.immutable("Klass::_java_mirror"); 817 818 public static final LocationIdentity CLASS_MIRROR_HANDLE_LOCATION = NamedLocationIdentity.immutable("Klass::_java_mirror handle"); 819 820 @Fold 821 public static int layoutHelperHeaderSizeShift(@InjectedParameter GraalHotSpotVMConfig config) { 822 return config.layoutHelperHeaderSizeShift; 823 } 824 825 @Fold 826 public static int layoutHelperHeaderSizeMask(@InjectedParameter GraalHotSpotVMConfig config) { 827 return config.layoutHelperHeaderSizeMask; 828 } 829 830 @Fold 831 public static int layoutHelperLog2ElementSizeShift(@InjectedParameter GraalHotSpotVMConfig config) { 832 return config.layoutHelperLog2ElementSizeShift; 833 } 834 835 @Fold 836 public static int layoutHelperLog2ElementSizeMask(@InjectedParameter GraalHotSpotVMConfig config) { 837 return config.layoutHelperLog2ElementSizeMask; 838 } 839 840 @NodeIntrinsic(ForeignCallNode.class) 841 public static native int identityHashCode(@ConstantNodeParameter ForeignCallDescriptor descriptor, Object object); 842 843 @Fold 844 public static long gcTotalCollectionsAddress(@InjectedParameter GraalHotSpotVMConfig config) { 845 return config.gcTotalCollectionsAddress(); 846 } 847 848 @Fold 849 public static long referentOffset(@InjectedParameter MetaAccessProvider metaAccessProvider) { 850 return getFieldOffset(metaAccessProvider.lookupJavaType(Reference.class), "referent"); 851 } 852 853 public static final LocationIdentity OBJ_ARRAY_KLASS_ELEMENT_KLASS_LOCATION = new HotSpotOptimizingLocationIdentity("ObjArrayKlass::_element_klass") { 854 @Override 855 public ValueNode canonicalizeRead(ValueNode read, AddressNode location, ValueNode object, CanonicalizerTool tool) { 856 ValueNode javaObject = findReadHub(object); 857 if (javaObject != null) { 858 ResolvedJavaType type = StampTool.typeOrNull(javaObject); 859 if (type != null && type.isArray()) { 860 ResolvedJavaType element = type.getComponentType(); 861 if (element != null && !element.isPrimitive() && !element.getElementalType().isInterface()) { 862 Assumptions assumptions = object.graph().getAssumptions(); 863 AssumptionResult<ResolvedJavaType> leafType = element.findLeafConcreteSubtype(); 864 if (leafType != null && leafType.canRecordTo(assumptions)) { 865 leafType.recordTo(assumptions); 866 return ConstantNode.forConstant(read.stamp(NodeView.DEFAULT), tool.getConstantReflection().asObjectHub(leafType.getResult()), tool.getMetaAccess()); 867 } 868 } 869 } 870 } 871 return read; 872 } 873 }; 874 875 @Fold 876 public static int arrayClassElementOffset(@InjectedParameter GraalHotSpotVMConfig config) { 877 return config.arrayClassElementOffset; 878 } 879 880 public static final LocationIdentity PRIMARY_SUPERS_LOCATION = NamedLocationIdentity.immutable("PrimarySupers"); 881 882 public static final LocationIdentity METASPACE_ARRAY_LENGTH_LOCATION = NamedLocationIdentity.immutable("MetaspaceArrayLength"); 883 884 public static final LocationIdentity SECONDARY_SUPERS_ELEMENT_LOCATION = NamedLocationIdentity.immutable("SecondarySupersElement"); 885 }