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.hotspot.HotSpotJVMCIRuntime.Option;
41 import jdk.vm.ci.meta.Constant;
42 import jdk.vm.ci.meta.ConstantPool;
43 import jdk.vm.ci.meta.DefaultProfilingInfo;
44 import jdk.vm.ci.meta.ExceptionHandler;
45 import jdk.vm.ci.meta.JavaConstant;
46 import jdk.vm.ci.meta.JavaMethod;
47 import jdk.vm.ci.meta.JavaType;
48 import jdk.vm.ci.meta.LineNumberTable;
49 import jdk.vm.ci.meta.LineNumberTableImpl;
50 import jdk.vm.ci.meta.Local;
51 import jdk.vm.ci.meta.LocalImpl;
52 import jdk.vm.ci.meta.LocalVariableTable;
53 import jdk.vm.ci.meta.LocalVariableTableImpl;
54 import jdk.vm.ci.meta.ModifiersProvider;
55 import jdk.vm.ci.meta.ProfilingInfo;
56 import jdk.vm.ci.meta.ResolvedJavaMethod;
57 import jdk.vm.ci.meta.ResolvedJavaType;
58 import jdk.vm.ci.meta.Signature;
59 import jdk.vm.ci.meta.SpeculationLog;
60 import jdk.vm.ci.meta.TriState;
61
62 /**
63 * Implementation of {@link JavaMethod} for resolved HotSpot methods.
64 */
65 final class HotSpotResolvedJavaMethodImpl extends HotSpotMethod implements HotSpotResolvedJavaMethod, HotSpotProxified, MetaspaceWrapperObject {
66
67 /**
68 * Reference to metaspace Method object.
69 */
70 private final long metaspaceMethod;
71
72 private final HotSpotResolvedObjectTypeImpl holder;
73 private final HotSpotConstantPool constantPool;
74 private final HotSpotSignature signature;
75 private HotSpotMethodData methodData;
76 private byte[] code;
77 private Executable toJavaCache;
78
79 /**
80 * Gets the holder of a HotSpot metaspace method native object.
81 *
82 * @param metaspaceMethod a metaspace Method object
83 * @return the {@link ResolvedJavaType} corresponding to the holder of the
84 * {@code metaspaceMethod}
85 */
86 private static HotSpotResolvedObjectTypeImpl getHolder(long metaspaceMethod) {
87 HotSpotVMConfig config = config();
88 final long metaspaceConstMethod = UNSAFE.getAddress(metaspaceMethod + config.methodConstMethodOffset);
89 final long metaspaceConstantPool = UNSAFE.getAddress(metaspaceConstMethod + config.constMethodConstantsOffset);
90 return compilerToVM().getResolvedJavaType(null, metaspaceConstantPool + config.constantPoolHolderOffset, false);
91 }
92
93 /**
94 * Gets the JVMCI mirror from a HotSpot method. The VM is responsible for ensuring that the
95 * Method* is kept alive for the duration of this call and the
96 * {@link HotSpotJVMCIMetaAccessContext} keeps it alive after that.
97 *
98 * Called from the VM.
99 *
100 * @param metaspaceMethod a metaspace Method object
101 * @return the {@link ResolvedJavaMethod} corresponding to {@code metaspaceMethod}
102 */
103 @SuppressWarnings("unused")
104 private static HotSpotResolvedJavaMethod fromMetaspace(long metaspaceMethod) {
105 HotSpotResolvedObjectTypeImpl holder = getHolder(metaspaceMethod);
106 return holder.createMethod(metaspaceMethod);
107 }
108
109 HotSpotResolvedJavaMethodImpl(HotSpotResolvedObjectTypeImpl holder, long metaspaceMethod) {
110 // It would be too much work to get the method name here so we fill it in later.
111 super(null);
112 this.metaspaceMethod = metaspaceMethod;
113 this.holder = holder;
114
115 HotSpotVMConfig config = config();
116 final long constMethod = getConstMethod();
117
118 /*
119 * Get the constant pool from the metaspace method. Some methods (e.g. intrinsics for
120 * signature-polymorphic method handle methods) have their own constant pool instead of the
121 * one from their holder.
122 */
123 final long metaspaceConstantPool = UNSAFE.getAddress(constMethod + config.constMethodConstantsOffset);
124 if (metaspaceConstantPool == holder.getConstantPool().getMetaspaceConstantPool()) {
125 this.constantPool = holder.getConstantPool();
126 } else {
127 this.constantPool = compilerToVM().getConstantPool(null, constMethod + config.constMethodConstantsOffset);
128 }
129
130 final int nameIndex = UNSAFE.getChar(constMethod + config.constMethodNameIndexOffset);
131 this.name = constantPool.lookupUtf8(nameIndex);
132
133 final int signatureIndex = UNSAFE.getChar(constMethod + config.constMethodSignatureIndexOffset);
134 this.signature = (HotSpotSignature) constantPool.lookupSignature(signatureIndex);
135 }
136
137 /**
138 * Returns a pointer to this method's constant method data structure (
139 * {@code Method::_constMethod}). This pointer isn't wrapped since it should be safe to use it
140 * within the context of this HotSpotResolvedJavaMethodImpl since the Method* and ConstMethod*
141 * are kept alive as a pair.
142 *
143 * @return pointer to this method's ConstMethod
144 */
145 private long getConstMethod() {
146 assert metaspaceMethod != 0;
147 return UNSAFE.getAddress(metaspaceMethod + config().methodConstMethodOffset);
148 }
149
150 @Override
151 public boolean equals(Object obj) {
152 if (this == obj) {
153 return true;
154 }
155 if (obj instanceof HotSpotResolvedJavaMethodImpl) {
156 HotSpotResolvedJavaMethodImpl that = (HotSpotResolvedJavaMethodImpl) obj;
157 return that.metaspaceMethod == metaspaceMethod;
158 }
159 return false;
160 }
161
162 @Override
163 public int hashCode() {
164 return (int) metaspaceMethod;
165 }
166
167 /**
168 * Returns this method's flags ({@code Method::_flags}).
169 *
170 * @return flags of this method
171 */
172 private int getFlags() {
173 return UNSAFE.getShort(metaspaceMethod + config().methodFlagsOffset);
174 }
175
176 /**
177 * Returns this method's constant method flags ({@code ConstMethod::_flags}).
178 *
179 * @return flags of this method's ConstMethod
180 */
181 private int getConstMethodFlags() {
182 return UNSAFE.getChar(getConstMethod() + config().constMethodFlagsOffset);
183 }
184
185 @Override
186 public HotSpotResolvedObjectTypeImpl getDeclaringClass() {
187 return holder;
188 }
189
190 /**
191 * Gets the address of the C++ Method object for this method.
192 */
193 public Constant getMetaspaceMethodConstant() {
194 return HotSpotMetaspaceConstantImpl.forMetaspaceObject(this, false);
195 }
196
197 public long getMetaspacePointer() {
198 return metaspaceMethod;
199 }
200
201 @Override
202 public Constant getEncoding() {
203 return getMetaspaceMethodConstant();
204 }
205
206 /**
207 * Gets the complete set of modifiers for this method which includes the JVM specification
208 * modifiers as well as the HotSpot internal modifiers.
209 */
210 public int getAllModifiers() {
211 return UNSAFE.getInt(metaspaceMethod + config().methodAccessFlagsOffset);
212 }
213
214 @Override
215 public int getModifiers() {
216 return getAllModifiers() & ModifiersProvider.jvmMethodModifiers();
217 }
218
219 @Override
220 public boolean canBeStaticallyBound() {
221 return (isFinal() || isPrivate() || isStatic() || holder.isLeaf()) && isConcrete();
222 }
223
224 @Override
225 public byte[] getCode() {
226 if (getCodeSize() == 0) {
227 return null;
228 }
229 if (code == null && holder.isLinked()) {
230 code = compilerToVM().getBytecode(this);
231 assert code.length == getCodeSize() : "expected: " + getCodeSize() + ", actual: " + code.length;
232 }
233 return code;
234 }
235
236 @Override
237 public int getCodeSize() {
238 return UNSAFE.getChar(getConstMethod() + config().constMethodCodeSizeOffset);
239 }
240
241 @Override
242 public ExceptionHandler[] getExceptionHandlers() {
243 final boolean hasExceptionTable = (getConstMethodFlags() & config().constMethodHasExceptionTable) != 0;
244 if (!hasExceptionTable) {
245 return new ExceptionHandler[0];
246 }
247
248 HotSpotVMConfig config = config();
249 final int exceptionTableLength = compilerToVM().getExceptionTableLength(this);
250 ExceptionHandler[] handlers = new ExceptionHandler[exceptionTableLength];
251 long exceptionTableElement = compilerToVM().getExceptionTableStart(this);
252
253 for (int i = 0; i < exceptionTableLength; i++) {
254 final int startPc = UNSAFE.getChar(exceptionTableElement + config.exceptionTableElementStartPcOffset);
255 final int endPc = UNSAFE.getChar(exceptionTableElement + config.exceptionTableElementEndPcOffset);
256 final int handlerPc = UNSAFE.getChar(exceptionTableElement + config.exceptionTableElementHandlerPcOffset);
257 int catchTypeIndex = UNSAFE.getChar(exceptionTableElement + config.exceptionTableElementCatchTypeIndexOffset);
258
259 JavaType catchType;
260 if (catchTypeIndex == 0) {
261 catchType = null;
262 } else {
263 final int opcode = -1; // opcode is not used
264 catchType = constantPool.lookupType(catchTypeIndex, opcode);
265
266 // Check for Throwable which catches everything.
267 if (catchType instanceof HotSpotResolvedObjectTypeImpl) {
268 HotSpotResolvedObjectTypeImpl resolvedType = (HotSpotResolvedObjectTypeImpl) catchType;
269 if (resolvedType.mirror() == Throwable.class) {
270 catchTypeIndex = 0;
271 catchType = null;
272 }
273 }
274 }
275 handlers[i] = new ExceptionHandler(startPc, endPc, handlerPc, catchTypeIndex, catchType);
276
277 // Go to the next ExceptionTableElement
278 exceptionTableElement += config.exceptionTableElementSize;
279 }
280
281 return handlers;
282 }
283
284 /**
285 * Returns true if this method has a {@code CallerSensitive} annotation.
286 *
287 * @return true if CallerSensitive annotation present, false otherwise
288 */
289 public boolean isCallerSensitive() {
290 return (getFlags() & config().methodFlagsCallerSensitive) != 0;
291 }
292
293 /**
294 * Returns true if this method has a {@code ForceInline} annotation.
295 *
296 * @return true if ForceInline annotation present, false otherwise
297 */
298 public boolean isForceInline() {
299 return (getFlags() & config().methodFlagsForceInline) != 0;
300 }
301
302 /**
303 * Returns true if this method has a {@code DontInline} annotation.
304 *
305 * @return true if DontInline annotation present, false otherwise
306 */
307 public boolean isDontInline() {
308 return (getFlags() & config().methodFlagsDontInline) != 0;
309 }
310
311 /**
312 * Returns true if this method has a {@code ReservedStackAccess} annotation.
313 *
314 * @return true if ReservedStackAccess annotation present, false otherwise
315 */
316 public boolean hasReservedStackAccess() {
317 return (getFlags() & config().methodFlagsReservedStackAccess) != 0;
318 }
319
320 /**
321 * Manually adds a DontInline annotation to this method.
322 */
323 public void setNotInlineable() {
324 compilerToVM().doNotInlineOrCompile(this);
325 }
326
327 /**
328 * Returns true if this method is one of the special methods that is ignored by security stack
329 * walks.
330 *
331 * @return true if special method ignored by security stack walks, false otherwise
332 */
333 public boolean ignoredBySecurityStackWalk() {
334 return compilerToVM().methodIsIgnoredBySecurityStackWalk(this);
335 }
336
337 @Override
338 public boolean isClassInitializer() {
339 return "<clinit>".equals(name) && isStatic();
340 }
341
342 @Override
343 public boolean isConstructor() {
344 return "<init>".equals(name) && !isStatic();
345 }
346
347 @Override
348 public int getMaxLocals() {
349 if (isAbstract() || isNative()) {
350 return 0;
351 }
352 HotSpotVMConfig config = config();
353 return UNSAFE.getChar(getConstMethod() + config.methodMaxLocalsOffset);
354 }
355
356 @Override
357 public int getMaxStackSize() {
358 if (isAbstract() || isNative()) {
359 return 0;
360 }
361 HotSpotVMConfig config = config();
362 return config.extraStackEntries + UNSAFE.getChar(getConstMethod() + config.constMethodMaxStackOffset);
363 }
364
365 @Override
366 public StackTraceElement asStackTraceElement(int bci) {
367 if (bci < 0 || bci >= getCodeSize()) {
368 // HotSpot code can only construct stack trace elements for valid bcis
369 StackTraceElement ste = compilerToVM().getStackTraceElement(this, 0);
370 return new StackTraceElement(ste.getClassName(), ste.getMethodName(), ste.getFileName(), -1);
371 }
372 return compilerToVM().getStackTraceElement(this, bci);
373 }
374
375 public ResolvedJavaMethod uniqueConcreteMethod(HotSpotResolvedObjectType receiver) {
376 if (receiver.isInterface()) {
377 // Cannot trust interfaces. Because of:
378 // interface I { void foo(); }
379 // class A { public void foo() {} }
380 // class B extends A implements I { }
381 // class C extends B { public void foo() { } }
382 // class D extends B { }
383 // Would lead to identify C.foo() as the unique concrete method for I.foo() without
384 // seeing A.foo().
385 return null;
386 }
387 if (this.isDefault()) {
388 // CHA for default methods doesn't work and may crash the VM
389 return null;
390 }
391 return compilerToVM().findUniqueConcreteMethod(((HotSpotResolvedObjectTypeImpl) receiver), this);
392 }
393
394 @Override
395 public HotSpotSignature getSignature() {
396 return signature;
397 }
398
399 /**
400 * Gets the value of {@code Method::_code}.
401 *
402 * @return the value of {@code Method::_code}
403 */
404 private long getCompiledCode() {
405 HotSpotVMConfig config = config();
406 return UNSAFE.getAddress(metaspaceMethod + config.methodCodeOffset);
407 }
408
409 /**
410 * Returns whether this method has compiled code.
411 *
412 * @return true if this method has compiled code, false otherwise
413 */
414 public boolean hasCompiledCode() {
415 return getCompiledCode() != 0L;
416 }
417
418 /**
419 * @param level
420 * @return true if the currently installed code was generated at {@code level}.
421 */
422 public boolean hasCompiledCodeAtLevel(int level) {
423 long compiledCode = getCompiledCode();
424 if (compiledCode != 0) {
425 return UNSAFE.getInt(compiledCode + config().nmethodCompLevelOffset) == level;
426 }
427 return false;
428 }
429
430 @Override
431 public ProfilingInfo getProfilingInfo(boolean includeNormal, boolean includeOSR) {
432 ProfilingInfo info;
433
434 if (methodData == null) {
435 long metaspaceMethodData = UNSAFE.getAddress(metaspaceMethod + config().methodDataOffset);
436 if (metaspaceMethodData != 0) {
437 methodData = new HotSpotMethodData(metaspaceMethodData, this);
438 String methodDataFilter = Option.TraceMethodDataFilter.getString();
439 if (methodDataFilter != null && this.format("%H.%n").contains(methodDataFilter)) {
440 System.out.println("Raw method data for " + this.format("%H.%n(%p)") + ":");
441 System.out.println(methodData.toString());
442 }
443 }
444 }
445
446 if (methodData == null || (!methodData.hasNormalData() && !methodData.hasExtraData())) {
447 // Be optimistic and return false for exceptionSeen. A methodDataOop is allocated in
448 // case of a deoptimization.
449 info = DefaultProfilingInfo.get(TriState.FALSE);
450 } else {
451 info = new HotSpotProfilingInfo(methodData, this, includeNormal, includeOSR);
452 }
453 return info;
454 }
455
456 @Override
457 public void reprofile() {
458 compilerToVM().reprofile(this);
459 }
460
461 @Override
462 public ConstantPool getConstantPool() {
463 return constantPool;
464 }
465
466 @Override
467 public Annotation[][] getParameterAnnotations() {
468 Executable javaMethod = toJava();
469 return javaMethod == null ? null : javaMethod.getParameterAnnotations();
470 }
471
472 @Override
473 public Annotation[] getAnnotations() {
474 Executable javaMethod = toJava();
475 return javaMethod == null ? new Annotation[0] : javaMethod.getAnnotations();
476 }
477
478 @Override
479 public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
480 Executable javaMethod = toJava();
481 return javaMethod == null ? null : javaMethod.getAnnotation(annotationClass);
482 }
483
484 public boolean isDefault() {
485 if (isConstructor()) {
486 return false;
487 }
488 // Copied from java.lang.Method.isDefault()
489 int mask = Modifier.ABSTRACT | Modifier.PUBLIC | Modifier.STATIC;
490 return ((getModifiers() & mask) == Modifier.PUBLIC) && getDeclaringClass().isInterface();
491 }
492
493 @Override
494 public Type[] getGenericParameterTypes() {
495 Executable javaMethod = toJava();
496 return javaMethod == null ? null : javaMethod.getGenericParameterTypes();
497 }
498
499 public Class<?>[] signatureToTypes() {
500 Signature sig = getSignature();
501 int count = sig.getParameterCount(false);
502 Class<?>[] result = new Class<?>[count];
503 for (int i = 0; i < result.length; ++i) {
504 JavaType parameterType = sig.getParameterType(i, holder);
505 HotSpotResolvedJavaType resolvedParameterType = (HotSpotResolvedJavaType) parameterType.resolve(holder);
506 result[i] = resolvedParameterType.mirror();
507 }
508 return result;
509 }
510
511 private Executable toJava() {
512 if (toJavaCache != null) {
513 return toJavaCache;
514 }
515 try {
516 Class<?>[] parameterTypes = signatureToTypes();
517 Executable result = isConstructor() ? holder.mirror().getDeclaredConstructor(parameterTypes) : holder.mirror().getDeclaredMethod(name, parameterTypes);
518 toJavaCache = result;
519 return result;
520 } catch (NoSuchMethodException | NoClassDefFoundError e) {
521 return null;
522 }
523 }
524
525 @Override
526 public boolean canBeInlined() {
527 if (isDontInline()) {
528 return false;
529 }
530 return compilerToVM().canInlineMethod(this);
531 }
532
533 @Override
534 public boolean shouldBeInlined() {
535 if (isForceInline()) {
536 return true;
537 }
538 return compilerToVM().shouldInlineMethod(this);
539 }
540
541 @Override
542 public LineNumberTable getLineNumberTable() {
543 final boolean hasLineNumberTable = (getConstMethodFlags() & config().constMethodHasLineNumberTable) != 0;
544 if (!hasLineNumberTable) {
545 return null;
546 }
547
548 long[] values = compilerToVM().getLineNumberTable(this);
549 if (values == null || values.length == 0) {
550 // Empty table so treat is as non-existent
551 return null;
552 }
553 assert values.length % 2 == 0;
554 int[] bci = new int[values.length / 2];
555 int[] line = new int[values.length / 2];
556
557 for (int i = 0; i < values.length / 2; i++) {
558 bci[i] = (int) values[i * 2];
559 line[i] = (int) values[i * 2 + 1];
560 }
561
562 return new LineNumberTableImpl(line, bci);
563 }
564
565 @Override
566 public LocalVariableTable getLocalVariableTable() {
567 final boolean hasLocalVariableTable = (getConstMethodFlags() & config().constMethodHasLocalVariableTable) != 0;
568 if (!hasLocalVariableTable) {
569 return null;
570 }
571
572 HotSpotVMConfig config = config();
573 long localVariableTableElement = compilerToVM().getLocalVariableTableStart(this);
574 final int localVariableTableLength = compilerToVM().getLocalVariableTableLength(this);
575 Local[] locals = new Local[localVariableTableLength];
576
577 for (int i = 0; i < localVariableTableLength; i++) {
578 final int startBci = UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementStartBciOffset);
579 final int endBci = startBci + UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementLengthOffset);
580 final int nameCpIndex = UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementNameCpIndexOffset);
581 final int typeCpIndex = UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementDescriptorCpIndexOffset);
582 final int slot = UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementSlotOffset);
583
584 String localName = getConstantPool().lookupUtf8(nameCpIndex);
585 String localType = getConstantPool().lookupUtf8(typeCpIndex);
586
587 locals[i] = new LocalImpl(localName, runtime().lookupType(localType, holder, false), startBci, endBci, slot);
588
589 // Go to the next LocalVariableTableElement
590 localVariableTableElement += config.localVariableTableElementSize;
591 }
592
593 return new LocalVariableTableImpl(locals);
594 }
595
596 /**
597 * Returns the offset of this method into the v-table. The method must have a v-table entry as
598 * indicated by {@link #isInVirtualMethodTable(ResolvedJavaType)}, otherwise an exception is
599 * thrown.
600 *
601 * @return the offset of this method into the v-table
602 */
603 public int vtableEntryOffset(ResolvedJavaType resolved) {
604 if (!isInVirtualMethodTable(resolved)) {
605 throw new JVMCIError("%s does not have a vtable entry in type %s", this, resolved);
606 }
607 HotSpotVMConfig config = config();
608 final int vtableIndex = getVtableIndex((HotSpotResolvedObjectTypeImpl) resolved);
609 return config.klassVtableStartOffset + vtableIndex * config.vtableEntrySize + config.vtableEntryMethodOffset;
610 }
611
612 @Override
613 public boolean isInVirtualMethodTable(ResolvedJavaType resolved) {
614 if (resolved instanceof HotSpotResolvedObjectTypeImpl) {
615 HotSpotResolvedObjectTypeImpl hotspotResolved = (HotSpotResolvedObjectTypeImpl) resolved;
616 int vtableIndex = getVtableIndex(hotspotResolved);
617 return vtableIndex >= 0 && vtableIndex < hotspotResolved.getVtableLength();
618 }
619 return false;
620 }
621
622 private int getVtableIndex(HotSpotResolvedObjectTypeImpl resolved) {
623 if (!holder.isLinked()) {
624 return config().invalidVtableIndex;
625 }
626 if (holder.isInterface()) {
627 if (resolved.isInterface()) {
628 return config().invalidVtableIndex;
629 }
630 return getVtableIndexForInterfaceMethod(resolved);
631 }
632 return getVtableIndex();
633 }
634
635 /**
636 * Returns this method's virtual table index.
637 *
638 * @return virtual table index
639 */
640 private int getVtableIndex() {
641 assert !holder.isInterface();
642 HotSpotVMConfig config = config();
643 int result = UNSAFE.getInt(metaspaceMethod + config.methodVtableIndexOffset);
644 assert result >= config.nonvirtualVtableIndex : "must be linked";
645 return result;
646 }
647
648 private int getVtableIndexForInterfaceMethod(ResolvedJavaType resolved) {
649 HotSpotResolvedObjectTypeImpl hotspotType = (HotSpotResolvedObjectTypeImpl) resolved;
650 return compilerToVM().getVtableIndexForInterfaceMethod(hotspotType, this);
651 }
652
653 /**
654 * The {@link SpeculationLog} for methods compiled by JVMCI hang off this per-declaring-type
655 * {@link ClassValue}. The raw Method* value is safe to use as a key in the map as a) it is
656 * never moves and b) we never read from it.
657 * <p>
658 * One implication is that we will preserve {@link SpeculationLog}s for methods that have been
659 * redefined via class redefinition. It's tempting to periodically flush such logs but we cannot
660 * read the JVM_ACC_IS_OBSOLETE bit (or anything else) via the raw pointer as obsoleted methods
661 * are subject to clean up and deletion (see InstanceKlass::purge_previous_versions_internal).
662 */
663 private static final ClassValue<Map<Long, SpeculationLog>> SpeculationLogs = new ClassValue<Map<Long, SpeculationLog>>() {
664 @Override
665 protected Map<Long, SpeculationLog> computeValue(java.lang.Class<?> type) {
666 return new HashMap<>(4);
667 }
668 };
669
670 public SpeculationLog getSpeculationLog() {
671 Map<Long, SpeculationLog> map = SpeculationLogs.get(holder.mirror());
672 synchronized (map) {
673 SpeculationLog log = map.get(this.metaspaceMethod);
674 if (log == null) {
675 log = new HotSpotSpeculationLog();
676 map.put(metaspaceMethod, log);
677 }
678 return log;
679 }
680 }
681
682 public int intrinsicId() {
683 HotSpotVMConfig config = config();
684 return UNSAFE.getChar(metaspaceMethod + config.methodIntrinsicIdOffset);
685 }
686
687 @Override
688 public JavaConstant invoke(JavaConstant receiver, JavaConstant[] arguments) {
689 assert !isConstructor();
690 Method javaMethod = (Method) toJava();
691 javaMethod.setAccessible(true);
692
693 Object[] objArguments = new Object[arguments.length];
694 for (int i = 0; i < arguments.length; i++) {
695 objArguments[i] = HotSpotObjectConstantImpl.asBoxedValue(arguments[i]);
696 }
697 Object objReceiver = receiver != null && !receiver.isNull() ? ((HotSpotObjectConstantImpl) receiver).object() : null;
698
699 try {
700 Object objResult = javaMethod.invoke(objReceiver, objArguments);
701 return javaMethod.getReturnType() == void.class ? null : HotSpotObjectConstantImpl.forBoxedValue(getSignature().getReturnKind(), objResult);
702
703 } catch (IllegalAccessException | InvocationTargetException ex) {
704 throw new IllegalArgumentException(ex);
705 }
706 }
707
708 /**
709 * Allocates a compile id for this method by asking the VM for one.
710 *
711 * @param entryBCI entry bci
712 * @return compile id
713 */
714 public int allocateCompileId(int entryBCI) {
715 return compilerToVM().allocateCompileId(this, entryBCI);
716 }
717
718 public boolean hasCodeAtLevel(int entryBCI, int level) {
719 if (entryBCI == config().invocationEntryBci) {
720 return hasCompiledCodeAtLevel(level);
721 }
722 return compilerToVM().hasCompiledCodeForOSR(this, entryBCI, level);
723 }
724 }