Mercurial > hg > graal-jvmci-8
view jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotResolvedObjectTypeImpl.java @ 22697:57646377e480
Rename Compiler to JVMCICompiler and expose it from JVMCIRuntime.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Wed, 21 Oct 2015 13:47:47 +0200 |
parents | 1bbd4a7c274b |
children | 87394b31a42e |
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/* * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package jdk.vm.ci.hotspot; import static java.util.Objects.requireNonNull; import static jdk.vm.ci.hotspot.CompilerToVM.compilerToVM; import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.runtime; import static jdk.vm.ci.hotspot.HotSpotVMConfig.config; import static jdk.vm.ci.hotspot.UnsafeAccess.UNSAFE; import java.lang.annotation.Annotation; import java.lang.reflect.Array; import java.lang.reflect.Constructor; import java.lang.reflect.Method; import java.lang.reflect.Modifier; import java.net.URL; import java.nio.ByteOrder; import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; import jdk.vm.ci.common.JVMCIError; import jdk.vm.ci.meta.Assumptions.AssumptionResult; import jdk.vm.ci.meta.Assumptions.ConcreteMethod; import jdk.vm.ci.meta.Assumptions.ConcreteSubtype; import jdk.vm.ci.meta.Assumptions.LeafType; import jdk.vm.ci.meta.Assumptions.NoFinalizableSubclass; import jdk.vm.ci.meta.Constant; import jdk.vm.ci.meta.JavaConstant; import jdk.vm.ci.meta.JavaKind; import jdk.vm.ci.meta.JavaType; import jdk.vm.ci.meta.MetaUtil; import jdk.vm.ci.meta.ModifiersProvider; import jdk.vm.ci.meta.ResolvedJavaField; import jdk.vm.ci.meta.ResolvedJavaMethod; import jdk.vm.ci.meta.ResolvedJavaType; import jdk.vm.ci.meta.TrustedInterface; /** * Implementation of {@link JavaType} for resolved non-primitive HotSpot classes. */ final class HotSpotResolvedObjectTypeImpl extends HotSpotResolvedJavaType implements HotSpotResolvedObjectType, HotSpotProxified, MetaspaceWrapperObject { /** * The Java class this type represents. */ private final Class<?> javaClass; private HashMap<Long, HotSpotResolvedJavaField> fieldCache; private HashMap<Long, HotSpotResolvedJavaMethodImpl> methodCache; private HotSpotResolvedJavaField[] instanceFields; private HotSpotResolvedObjectTypeImpl[] interfaces; private HotSpotConstantPool constantPool; final HotSpotJVMCIMetaAccessContext context; private HotSpotResolvedObjectType arrayOfType; /** * Gets the JVMCI mirror for a {@link Class} object. * * @return the {@link HotSpotResolvedJavaType} corresponding to {@code javaClass} */ static HotSpotResolvedObjectTypeImpl fromObjectClass(Class<?> javaClass) { return (HotSpotResolvedObjectTypeImpl) runtime().fromClass(javaClass); } /** * Gets the JVMCI mirror from a HotSpot type. Since {@link Class} is already a proxy for the * underlying Klass*, it is used instead of the raw Klass*. * * Called from the VM. * * @param javaClass a {@link Class} object * @return the {@link ResolvedJavaType} corresponding to {@code javaClass} */ @SuppressWarnings("unused") private static HotSpotResolvedObjectTypeImpl fromMetaspace(Class<?> javaClass) { return fromObjectClass(javaClass); } /** * Creates the JVMCI mirror for a {@link Class} object. * * <p> * <b>NOTE</b>: Creating an instance of this class does not install the mirror for the * {@link Class} type. Use {@link #fromObjectClass(Class)} or {@link #fromMetaspace(Class)} * instead. * </p> * * @param javaClass the Class to create the mirror for * @param context */ HotSpotResolvedObjectTypeImpl(Class<?> javaClass, HotSpotJVMCIMetaAccessContext context) { super(getSignatureName(javaClass)); this.javaClass = javaClass; this.context = context; assert getName().charAt(0) != '[' || isArray() : getName(); } /** * Returns the name of this type as it would appear in a signature. */ private static String getSignatureName(Class<?> javaClass) { if (javaClass.isArray()) { return javaClass.getName().replace('.', '/'); } return "L" + javaClass.getName().replace('.', '/') + ";"; } /** * Gets the metaspace Klass for this type. */ long getMetaspaceKlass() { if (HotSpotJVMCIRuntime.getHostWordKind() == JavaKind.Long) { return UNSAFE.getLong(javaClass, (long) config().klassOffset); } return UNSAFE.getInt(javaClass, (long) config().klassOffset) & 0xFFFFFFFFL; } public long getMetaspacePointer() { return getMetaspaceKlass(); } @Override public int getModifiers() { if (isArray()) { return (getElementalType().getModifiers() & (Modifier.PUBLIC | Modifier.PRIVATE | Modifier.PROTECTED)) | Modifier.FINAL | Modifier.ABSTRACT; } else { return getAccessFlags() & ModifiersProvider.jvmClassModifiers(); } } public int getAccessFlags() { HotSpotVMConfig config = config(); return UNSAFE.getInt(getMetaspaceKlass() + config.klassAccessFlagsOffset); } @Override public HotSpotResolvedObjectType getArrayClass() { if (arrayOfType == null) { arrayOfType = fromObjectClass(Array.newInstance(mirror(), 0).getClass()); } return arrayOfType; } @Override public ResolvedJavaType getComponentType() { Class<?> javaComponentType = mirror().getComponentType(); return javaComponentType == null ? null : runtime().fromClass(javaComponentType); } @Override public AssumptionResult<ResolvedJavaType> findLeafConcreteSubtype() { HotSpotVMConfig config = config(); if (isArray()) { return getElementalType().isLeaf() ? new AssumptionResult<>(this) : null; } else if (isInterface()) { HotSpotResolvedObjectTypeImpl implementor = getSingleImplementor(); /* * If the implementor field contains itself that indicates that the interface has more * than one implementors (see: InstanceKlass::add_implementor). */ if (implementor == null || implementor.equals(this)) { return null; } assert !implementor.isInterface(); if (implementor.isAbstract() || !implementor.isLeafClass()) { AssumptionResult<ResolvedJavaType> leafConcreteSubtype = implementor.findLeafConcreteSubtype(); if (leafConcreteSubtype != null) { assert !leafConcreteSubtype.getResult().equals(implementor); AssumptionResult<ResolvedJavaType> newResult = new AssumptionResult<>(leafConcreteSubtype.getResult(), new ConcreteSubtype(this, implementor)); // Accumulate leaf assumptions and return the combined result. newResult.add(leafConcreteSubtype); return newResult; } return null; } return new AssumptionResult<>(implementor, new LeafType(implementor), new ConcreteSubtype(this, implementor)); } else { HotSpotResolvedObjectTypeImpl type = this; while (type.isAbstract()) { HotSpotResolvedObjectTypeImpl subklass = type.getSubklass(); if (subklass == null || UNSAFE.getAddress(subklass.getMetaspaceKlass() + config.nextSiblingOffset) != 0) { return null; } type = subklass; } if (type.isAbstract() || type.isInterface() || !type.isLeafClass()) { return null; } if (this.isAbstract()) { return new AssumptionResult<>(type, new LeafType(type), new ConcreteSubtype(this, type)); } else { assert this.equals(type); return new AssumptionResult<>(type, new LeafType(type)); } } } /** * Returns if type {@code type} is a leaf class. This is the case if the * {@code Klass::_subklass} field of the underlying class is zero. * * @return true if the type is a leaf class */ private boolean isLeafClass() { return getSubklass() == null; } /** * Returns the {@code Klass::_subklass} field of the underlying metaspace klass for the given * type {@code type}. * * @return value of the subklass field as metaspace klass pointer */ private HotSpotResolvedObjectTypeImpl getSubklass() { return compilerToVM().getResolvedJavaType(this, config().subklassOffset, false); } @Override public HotSpotResolvedObjectTypeImpl getSuperclass() { Class<?> javaSuperclass = mirror().getSuperclass(); return javaSuperclass == null ? null : fromObjectClass(javaSuperclass); } @Override public HotSpotResolvedObjectTypeImpl[] getInterfaces() { if (interfaces == null) { Class<?>[] javaInterfaces = mirror().getInterfaces(); HotSpotResolvedObjectTypeImpl[] result = new HotSpotResolvedObjectTypeImpl[javaInterfaces.length]; for (int i = 0; i < javaInterfaces.length; i++) { result[i] = fromObjectClass(javaInterfaces[i]); } interfaces = result; } return interfaces; } @Override public HotSpotResolvedObjectTypeImpl getSingleImplementor() { if (!isInterface()) { throw new JVMCIError("Cannot call getSingleImplementor() on a non-interface type: %s", this); } return compilerToVM().getImplementor(this); } public HotSpotResolvedObjectTypeImpl getSupertype() { if (isArray()) { ResolvedJavaType componentType = getComponentType(); if (mirror() == Object[].class || componentType.isPrimitive()) { return fromObjectClass(Object.class); } return (HotSpotResolvedObjectTypeImpl) ((HotSpotResolvedObjectTypeImpl) componentType).getSupertype().getArrayClass(); } if (isInterface()) { return fromObjectClass(Object.class); } return getSuperclass(); } @Override public HotSpotResolvedObjectType findLeastCommonAncestor(ResolvedJavaType otherType) { if (otherType.isPrimitive()) { return null; } else { HotSpotResolvedObjectTypeImpl t1 = this; HotSpotResolvedObjectTypeImpl t2 = (HotSpotResolvedObjectTypeImpl) otherType; while (true) { if (t1.isAssignableFrom(t2)) { return t1; } if (t2.isAssignableFrom(t1)) { return t2; } t1 = t1.getSupertype(); t2 = t2.getSupertype(); } } } @Override public HotSpotResolvedObjectType asExactType() { return isLeaf() ? this : null; } @Override public JavaConstant getJavaClass() { return HotSpotObjectConstantImpl.forObject(mirror()); } @Override public Constant getObjectHub() { return klass(); } @Override public AssumptionResult<Boolean> hasFinalizableSubclass() { assert !isArray(); if (!compilerToVM().hasFinalizableSubclass(this)) { return new AssumptionResult<>(false, new NoFinalizableSubclass(this)); } return new AssumptionResult<>(true); } @Override public boolean hasFinalizer() { HotSpotVMConfig config = config(); return (getAccessFlags() & config.klassHasFinalizerFlag) != 0; } @Override public boolean isPrimitive() { return false; } @Override public boolean isArray() { return mirror().isArray(); } @Override public boolean isInitialized() { return isArray() ? true : getInitState() == config().instanceKlassStateFullyInitialized; } @Override public boolean isLinked() { return isArray() ? true : getInitState() >= config().instanceKlassStateLinked; } /** * Returns the value of the state field {@code InstanceKlass::_init_state} of the metaspace * klass. * * @return state field value of this type */ private int getInitState() { assert !isArray() : "_init_state only exists in InstanceKlass"; return UNSAFE.getByte(getMetaspaceKlass() + config().instanceKlassInitStateOffset) & 0xFF; } @Override public void initialize() { if (!isInitialized()) { UNSAFE.ensureClassInitialized(mirror()); assert isInitialized(); } } @Override public boolean isInstance(JavaConstant obj) { if (obj.getJavaKind() == JavaKind.Object && !obj.isNull()) { return mirror().isInstance(((HotSpotObjectConstantImpl) obj).object()); } return false; } @Override public boolean isInstanceClass() { return !isArray() && !isInterface(); } @Override public boolean isInterface() { return mirror().isInterface(); } @Override public boolean isAssignableFrom(ResolvedJavaType other) { assert other != null; if (other instanceof HotSpotResolvedObjectTypeImpl) { HotSpotResolvedObjectTypeImpl otherType = (HotSpotResolvedObjectTypeImpl) other; return mirror().isAssignableFrom(otherType.mirror()); } return false; } @Override public boolean isJavaLangObject() { return javaClass.equals(Object.class); } @Override public JavaKind getJavaKind() { return JavaKind.Object; } @Override public ResolvedJavaMethod resolveConcreteMethod(ResolvedJavaMethod method, ResolvedJavaType callerType) { ResolvedJavaMethod resolvedMethod = resolveMethod(method, callerType); if (resolvedMethod == null || resolvedMethod.isAbstract()) { return null; } return resolvedMethod; } @Override public ResolvedJavaMethod resolveMethod(ResolvedJavaMethod method, ResolvedJavaType callerType) { assert !callerType.isArray(); if (method.isConcrete() && method.getDeclaringClass().equals(this) && method.isPublic()) { return method; } if (!method.getDeclaringClass().isAssignableFrom(this)) { return null; } HotSpotResolvedJavaMethodImpl hotSpotMethod = (HotSpotResolvedJavaMethodImpl) method; HotSpotResolvedObjectTypeImpl hotSpotCallerType = (HotSpotResolvedObjectTypeImpl) callerType; return compilerToVM().resolveMethod(this, hotSpotMethod, hotSpotCallerType); } public HotSpotConstantPool getConstantPool() { if (constantPool == null) { constantPool = compilerToVM().getConstantPool(this, config().instanceKlassConstantsOffset); } return constantPool; } /** * Gets the instance size of this type. If an instance of this type cannot be fast path * allocated, then the returned value is negative (its absolute value gives the size). Must not * be called if this is an array or interface type. */ public int instanceSize() { assert !isArray(); assert !isInterface(); HotSpotVMConfig config = config(); final int layoutHelper = layoutHelper(); assert layoutHelper > config.klassLayoutHelperNeutralValue : "must be instance"; // See: Klass::layout_helper_size_in_bytes int size = layoutHelper & ~config.klassLayoutHelperInstanceSlowPathBit; // See: Klass::layout_helper_needs_slow_path boolean needsSlowPath = (layoutHelper & config.klassLayoutHelperInstanceSlowPathBit) != 0; return needsSlowPath ? -size : size; } public int layoutHelper() { HotSpotVMConfig config = config(); return UNSAFE.getInt(getMetaspaceKlass() + config.klassLayoutHelperOffset); } synchronized HotSpotResolvedJavaMethod createMethod(long metaspaceMethod) { HotSpotResolvedJavaMethodImpl method = null; if (methodCache == null) { methodCache = new HashMap<>(8); } else { method = methodCache.get(metaspaceMethod); } if (method == null) { method = new HotSpotResolvedJavaMethodImpl(this, metaspaceMethod); methodCache.put(metaspaceMethod, method); context.add(method); } return method; } public int getVtableLength() { HotSpotVMConfig config = config(); if (isInterface() || isArray()) { /* Everything has the core vtable of java.lang.Object */ return config.baseVtableLength; } int result = UNSAFE.getInt(getMetaspaceKlass() + config.instanceKlassVtableLengthOffset) / (config.vtableEntrySize / config.heapWordSize); assert result >= config.baseVtableLength : UNSAFE.getInt(getMetaspaceKlass() + config.instanceKlassVtableLengthOffset) + " " + config.vtableEntrySize; return result; } public synchronized HotSpotResolvedJavaField createField(String fieldName, JavaType type, long offset, int rawFlags) { HotSpotResolvedJavaField result = null; final int flags = rawFlags & ModifiersProvider.jvmFieldModifiers(); final long id = offset + ((long) flags << 32); // Must cache the fields, because the local load elimination only works if the // objects from two field lookups are identical. if (fieldCache == null) { fieldCache = new HashMap<>(8); } else { result = fieldCache.get(id); } if (result == null) { result = new HotSpotResolvedJavaFieldImpl(this, fieldName, type, offset, rawFlags); fieldCache.put(id, result); } else { assert result.getName().equals(fieldName); // assert result.getType().equals(type); assert result.offset() == offset; assert result.getModifiers() == flags; } return result; } @Override public AssumptionResult<ResolvedJavaMethod> findUniqueConcreteMethod(ResolvedJavaMethod method) { HotSpotResolvedJavaMethod hmethod = (HotSpotResolvedJavaMethod) method; HotSpotResolvedObjectType declaredHolder = hmethod.getDeclaringClass(); /* * Sometimes the receiver type in the graph hasn't stabilized to a subtype of declared * holder, usually because of phis, so make sure that the type is related to the declared * type before using it for lookup. Unlinked types should also be ignored because we can't * resolve the proper method to invoke. Generally unlinked types in invokes should result in * a deopt instead since they can't really be used if they aren't linked yet. */ if (!declaredHolder.isAssignableFrom(this) || this.isArray() || this.equals(declaredHolder) || !isLinked() || isInterface()) { ResolvedJavaMethod result = hmethod.uniqueConcreteMethod(declaredHolder); if (result != null) { return new AssumptionResult<>(result, new ConcreteMethod(method, declaredHolder, result)); } return null; } /* * The holder may be a subtype of the declaredHolder so make sure to resolve the method to * the correct method for the subtype. */ HotSpotResolvedJavaMethod resolvedMethod = (HotSpotResolvedJavaMethod) resolveMethod(hmethod, this); if (resolvedMethod == null) { // The type isn't known to implement the method. return null; } ResolvedJavaMethod result = resolvedMethod.uniqueConcreteMethod(this); if (result != null) { return new AssumptionResult<>(result, new ConcreteMethod(method, this, result)); } return null; } /** * This class represents the field information for one field contained in the fields array of an * {@code InstanceKlass}. The implementation is similar to the native {@code FieldInfo} class. */ private class FieldInfo { /** * Native pointer into the array of Java shorts. */ private final long metaspaceData; /** * Creates a field info for the field in the fields array at index {@code index}. * * @param index index to the fields array */ public FieldInfo(int index) { HotSpotVMConfig config = config(); // Get Klass::_fields final long metaspaceFields = UNSAFE.getAddress(getMetaspaceKlass() + config.instanceKlassFieldsOffset); assert config.fieldInfoFieldSlots == 6 : "revisit the field parsing code"; metaspaceData = metaspaceFields + config.arrayU2DataOffset + config.fieldInfoFieldSlots * Short.BYTES * index; } private int getAccessFlags() { return readFieldSlot(config().fieldInfoAccessFlagsOffset); } private int getNameIndex() { return readFieldSlot(config().fieldInfoNameIndexOffset); } private int getSignatureIndex() { return readFieldSlot(config().fieldInfoSignatureIndexOffset); } public int getOffset() { HotSpotVMConfig config = config(); final int lowPacked = readFieldSlot(config.fieldInfoLowPackedOffset); final int highPacked = readFieldSlot(config.fieldInfoHighPackedOffset); final int offset = ((highPacked << Short.SIZE) | lowPacked) >> config.fieldInfoTagSize; return offset; } /** * Helper method to read an entry (slot) from the field array. Currently field info is laid * on top an array of Java shorts. */ private int readFieldSlot(int index) { return UNSAFE.getChar(metaspaceData + Short.BYTES * index); } /** * Returns the name of this field as a {@link String}. If the field is an internal field the * name index is pointing into the vmSymbols table. */ public String getName() { final int nameIndex = getNameIndex(); return isInternal() ? HotSpotVmSymbols.symbolAt(nameIndex) : getConstantPool().lookupUtf8(nameIndex); } /** * Returns the signature of this field as {@link String}. If the field is an internal field * the signature index is pointing into the vmSymbols table. */ public String getSignature() { final int signatureIndex = getSignatureIndex(); return isInternal() ? HotSpotVmSymbols.symbolAt(signatureIndex) : getConstantPool().lookupUtf8(signatureIndex); } public JavaType getType() { String signature = getSignature(); return runtime().lookupType(signature, HotSpotResolvedObjectTypeImpl.this, false); } private boolean isInternal() { return (getAccessFlags() & config().jvmAccFieldInternal) != 0; } public boolean isStatic() { return Modifier.isStatic(getAccessFlags()); } public boolean hasGenericSignature() { return (getAccessFlags() & config().jvmAccFieldHasGenericSignature) != 0; } } private static class OffsetComparator implements java.util.Comparator<HotSpotResolvedJavaField> { @Override public int compare(HotSpotResolvedJavaField o1, HotSpotResolvedJavaField o2) { return o1.offset() - o2.offset(); } } @Override public ResolvedJavaField[] getInstanceFields(boolean includeSuperclasses) { if (instanceFields == null) { if (isArray() || isInterface()) { instanceFields = new HotSpotResolvedJavaField[0]; } else { final int fieldCount = getFieldCount(); ArrayList<HotSpotResolvedJavaField> fieldsArray = new ArrayList<>(fieldCount); for (int i = 0; i < fieldCount; i++) { FieldInfo field = new FieldInfo(i); // We are only interested in instance fields. if (!field.isStatic()) { HotSpotResolvedJavaField resolvedJavaField = createField(field.getName(), field.getType(), field.getOffset(), field.getAccessFlags()); fieldsArray.add(resolvedJavaField); } } fieldsArray.sort(new OffsetComparator()); HotSpotResolvedJavaField[] myFields = fieldsArray.toArray(new HotSpotResolvedJavaField[0]); if (mirror() != Object.class) { HotSpotResolvedJavaField[] superFields = (HotSpotResolvedJavaField[]) getSuperclass().getInstanceFields(true); HotSpotResolvedJavaField[] fields = Arrays.copyOf(superFields, superFields.length + myFields.length); System.arraycopy(myFields, 0, fields, superFields.length, myFields.length); instanceFields = fields; } else { assert myFields.length == 0 : "java.lang.Object has fields!"; instanceFields = myFields; } } } if (!includeSuperclasses) { int myFieldsStart = 0; while (myFieldsStart < instanceFields.length && !instanceFields[myFieldsStart].getDeclaringClass().equals(this)) { myFieldsStart++; } if (myFieldsStart == 0) { return instanceFields; } if (myFieldsStart == instanceFields.length) { return new HotSpotResolvedJavaField[0]; } return Arrays.copyOfRange(instanceFields, myFieldsStart, instanceFields.length); } return instanceFields; } @Override public ResolvedJavaField[] getStaticFields() { if (isArray()) { return new HotSpotResolvedJavaField[0]; } else { final int fieldCount = getFieldCount(); ArrayList<HotSpotResolvedJavaField> fieldsArray = new ArrayList<>(fieldCount); for (int i = 0; i < fieldCount; i++) { FieldInfo field = new FieldInfo(i); // We are only interested in static fields. if (field.isStatic()) { HotSpotResolvedJavaField resolvedJavaField = createField(field.getName(), field.getType(), field.getOffset(), field.getAccessFlags()); fieldsArray.add(resolvedJavaField); } } fieldsArray.sort(new OffsetComparator()); return fieldsArray.toArray(new HotSpotResolvedJavaField[fieldsArray.size()]); } } /** * Returns the actual field count of this class's internal {@code InstanceKlass::_fields} array * by walking the array and discounting the generic signature slots at the end of the array. * * <p> * See {@code FieldStreamBase::init_generic_signature_start_slot} */ private int getFieldCount() { HotSpotVMConfig config = config(); final long metaspaceFields = UNSAFE.getAddress(getMetaspaceKlass() + config.instanceKlassFieldsOffset); int metaspaceFieldsLength = UNSAFE.getInt(metaspaceFields + config.arrayU1LengthOffset); int fieldCount = 0; for (int i = 0, index = 0; i < metaspaceFieldsLength; i += config.fieldInfoFieldSlots, index++) { FieldInfo field = new FieldInfo(index); if (field.hasGenericSignature()) { metaspaceFieldsLength--; } fieldCount++; } return fieldCount; } @Override public Class<?> mirror() { return javaClass; } @Override public String getSourceFileName() { HotSpotVMConfig config = config(); final int sourceFileNameIndex = UNSAFE.getChar(getMetaspaceKlass() + config.instanceKlassSourceFileNameIndexOffset); if (sourceFileNameIndex == 0) { return null; } return getConstantPool().lookupUtf8(sourceFileNameIndex); } @Override public Annotation[] getAnnotations() { return mirror().getAnnotations(); } @Override public <T extends Annotation> T getAnnotation(Class<T> annotationClass) { return mirror().getAnnotation(annotationClass); } /** * Performs a fast-path check that this type is resolved in the context of a given accessing * class. A negative result does not mean this type is not resolved with respect to * {@code accessingClass}. That can only be determined by * {@linkplain HotSpotJVMCIRuntime#lookupType(String, HotSpotResolvedObjectType, boolean) * re-resolving} the type. */ public boolean isDefinitelyResolvedWithRespectTo(ResolvedJavaType accessingClass) { assert accessingClass != null; ResolvedJavaType elementType = getElementalType(); if (elementType.isPrimitive()) { // Primitive type resolution is context free. return true; } if (elementType.getName().startsWith("Ljava/")) { // Classes in a java.* package can only be defined by the // boot class loader. This is enforced by ClassLoader.preDefineClass() assert mirror().getClassLoader() == null; return true; } ClassLoader thisCl = mirror().getClassLoader(); ClassLoader accessingClassCl = ((HotSpotResolvedObjectTypeImpl) accessingClass).mirror().getClassLoader(); return thisCl == accessingClassCl; } @Override public ResolvedJavaType resolve(ResolvedJavaType accessingClass) { if (isDefinitelyResolvedWithRespectTo(requireNonNull(accessingClass))) { return this; } HotSpotResolvedObjectTypeImpl accessingType = (HotSpotResolvedObjectTypeImpl) accessingClass; return (ResolvedJavaType) runtime().lookupType(getName(), accessingType, true); } /** * Gets the metaspace Klass boxed in a {@link JavaConstant}. */ public Constant klass() { return HotSpotMetaspaceConstantImpl.forMetaspaceObject(this, false); } public boolean isPrimaryType() { return config().secondarySuperCacheOffset != superCheckOffset(); } public int superCheckOffset() { HotSpotVMConfig config = config(); return UNSAFE.getInt(getMetaspaceKlass() + config.superCheckOffsetOffset); } public long prototypeMarkWord() { HotSpotVMConfig config = config(); if (isArray()) { return config.arrayPrototypeMarkWord(); } else { return UNSAFE.getAddress(getMetaspaceKlass() + config.prototypeMarkWordOffset); } } @Override public ResolvedJavaField findInstanceFieldWithOffset(long offset, JavaKind expectedEntryKind) { ResolvedJavaField[] declaredFields = getInstanceFields(true); for (ResolvedJavaField field : declaredFields) { HotSpotResolvedJavaField resolvedField = (HotSpotResolvedJavaField) field; long resolvedFieldOffset = resolvedField.offset(); // @formatter:off if (ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN && expectedEntryKind.isPrimitive() && !expectedEntryKind.equals(JavaKind.Void) && resolvedField.getJavaKind().isPrimitive()) { resolvedFieldOffset += resolvedField.getJavaKind().getByteCount() - Math.min(resolvedField.getJavaKind().getByteCount(), 4 + expectedEntryKind.getByteCount()); } if (resolvedFieldOffset == offset) { return field; } // @formatter:on } return null; } @Override public URL getClassFilePath() { Class<?> cls = mirror(); return cls.getResource(MetaUtil.getSimpleName(cls, true).replace('.', '$') + ".class"); } @Override public boolean isLocal() { return mirror().isLocalClass(); } @Override public boolean isMember() { return mirror().isMemberClass(); } @Override public HotSpotResolvedObjectTypeImpl getEnclosingType() { final Class<?> encl = mirror().getEnclosingClass(); return encl == null ? null : fromObjectClass(encl); } @Override public ResolvedJavaMethod[] getDeclaredConstructors() { Constructor<?>[] constructors = mirror().getDeclaredConstructors(); ResolvedJavaMethod[] result = new ResolvedJavaMethod[constructors.length]; for (int i = 0; i < constructors.length; i++) { result[i] = runtime().getHostJVMCIBackend().getMetaAccess().lookupJavaMethod(constructors[i]); assert result[i].isConstructor(); } return result; } @Override public ResolvedJavaMethod[] getDeclaredMethods() { Method[] methods = mirror().getDeclaredMethods(); ResolvedJavaMethod[] result = new ResolvedJavaMethod[methods.length]; for (int i = 0; i < methods.length; i++) { result[i] = runtime().getHostJVMCIBackend().getMetaAccess().lookupJavaMethod(methods[i]); assert !result[i].isConstructor(); } return result; } public ResolvedJavaMethod getClassInitializer() { return compilerToVM().getClassInitializer(this); } @Override public String toString() { return "HotSpotType<" + getName() + ", resolved>"; } @Override public boolean isTrustedInterfaceType() { return TrustedInterface.class.isAssignableFrom(mirror()); } }