| /* |
| * Copyright (c) 2011, 2017, 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 jdk.vm.ci.hotspot.CompilerToVM.compilerToVM; |
| import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.runtime; |
| import static jdk.vm.ci.hotspot.HotSpotModifiers.BRIDGE; |
| import static jdk.vm.ci.hotspot.HotSpotModifiers.SYNTHETIC; |
| import static jdk.vm.ci.hotspot.HotSpotModifiers.VARARGS; |
| import static jdk.vm.ci.hotspot.HotSpotModifiers.jvmMethodModifiers; |
| 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.Executable; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.lang.reflect.Type; |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import jdk.vm.ci.common.JVMCIError; |
| import jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.Option; |
| import jdk.vm.ci.meta.Constant; |
| import jdk.vm.ci.meta.ConstantPool; |
| import jdk.vm.ci.meta.DefaultProfilingInfo; |
| import jdk.vm.ci.meta.ExceptionHandler; |
| import jdk.vm.ci.meta.JavaMethod; |
| import jdk.vm.ci.meta.JavaType; |
| import jdk.vm.ci.meta.LineNumberTable; |
| import jdk.vm.ci.meta.Local; |
| import jdk.vm.ci.meta.LocalVariableTable; |
| import jdk.vm.ci.meta.ProfilingInfo; |
| import jdk.vm.ci.meta.ResolvedJavaMethod; |
| import jdk.vm.ci.meta.ResolvedJavaType; |
| import jdk.vm.ci.meta.Signature; |
| import jdk.vm.ci.meta.SpeculationLog; |
| import jdk.vm.ci.meta.TriState; |
| |
| /** |
| * Implementation of {@link JavaMethod} for resolved HotSpot methods. |
| */ |
| final class HotSpotResolvedJavaMethodImpl extends HotSpotMethod implements HotSpotResolvedJavaMethod, MetaspaceWrapperObject { |
| |
| /** |
| * Reference to metaspace Method object. |
| */ |
| private final long metaspaceMethod; |
| |
| private final HotSpotResolvedObjectTypeImpl holder; |
| private final HotSpotConstantPool constantPool; |
| private final HotSpotSignature signature; |
| private HotSpotMethodData methodData; |
| private byte[] code; |
| private Executable toJavaCache; |
| |
| /** |
| * Only 30% of {@link HotSpotResolvedJavaMethodImpl}s have their name accessed so compute it |
| * lazily and cache it. |
| */ |
| private String nameCache; |
| |
| /** |
| * Gets the holder of a HotSpot metaspace method native object. |
| * |
| * @param metaspaceMethod a metaspace Method object |
| * @return the {@link ResolvedJavaType} corresponding to the holder of the |
| * {@code metaspaceMethod} |
| */ |
| private static HotSpotResolvedObjectTypeImpl getHolder(long metaspaceMethod) { |
| HotSpotVMConfig config = config(); |
| final long metaspaceConstMethod = UNSAFE.getAddress(metaspaceMethod + config.methodConstMethodOffset); |
| final long metaspaceConstantPool = UNSAFE.getAddress(metaspaceConstMethod + config.constMethodConstantsOffset); |
| return compilerToVM().getResolvedJavaType(null, metaspaceConstantPool + config.constantPoolHolderOffset, false); |
| } |
| |
| /** |
| * Gets the JVMCI mirror from a HotSpot method. The VM is responsible for ensuring that the |
| * Method* is kept alive for the duration of this call and the |
| * {@link HotSpotJVMCIMetaAccessContext} keeps it alive after that. |
| * |
| * Called from the VM. |
| * |
| * @param metaspaceMethod a metaspace Method object |
| * @return the {@link ResolvedJavaMethod} corresponding to {@code metaspaceMethod} |
| */ |
| @SuppressWarnings("unused") |
| private static HotSpotResolvedJavaMethod fromMetaspace(long metaspaceMethod) { |
| HotSpotResolvedObjectTypeImpl holder = getHolder(metaspaceMethod); |
| return holder.createMethod(metaspaceMethod); |
| } |
| |
| HotSpotResolvedJavaMethodImpl(HotSpotResolvedObjectTypeImpl holder, long metaspaceMethod) { |
| this.metaspaceMethod = metaspaceMethod; |
| this.holder = holder; |
| |
| HotSpotVMConfig config = config(); |
| final long constMethod = getConstMethod(); |
| |
| /* |
| * Get the constant pool from the metaspace method. Some methods (e.g. intrinsics for |
| * signature-polymorphic method handle methods) have their own constant pool instead of the |
| * one from their holder. |
| */ |
| final long metaspaceConstantPool = UNSAFE.getAddress(constMethod + config.constMethodConstantsOffset); |
| if (metaspaceConstantPool == holder.getConstantPool().getMetaspaceConstantPool()) { |
| this.constantPool = holder.getConstantPool(); |
| } else { |
| this.constantPool = compilerToVM().getConstantPool(this); |
| } |
| |
| final int signatureIndex = UNSAFE.getChar(constMethod + config.constMethodSignatureIndexOffset); |
| this.signature = (HotSpotSignature) constantPool.lookupSignature(signatureIndex); |
| } |
| |
| /** |
| * Returns a pointer to this method's constant method data structure ( |
| * {@code Method::_constMethod}). This pointer isn't wrapped since it should be safe to use it |
| * within the context of this HotSpotResolvedJavaMethodImpl since the Method* and ConstMethod* |
| * are kept alive as a pair. |
| * |
| * @return pointer to this method's ConstMethod |
| */ |
| private long getConstMethod() { |
| assert metaspaceMethod != 0; |
| return UNSAFE.getAddress(metaspaceMethod + config().methodConstMethodOffset); |
| } |
| |
| @Override |
| public String getName() { |
| if (nameCache == null) { |
| final int nameIndex = UNSAFE.getChar(getConstMethod() + config().constMethodNameIndexOffset); |
| nameCache = constantPool.lookupUtf8(nameIndex); |
| } |
| return nameCache; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof HotSpotResolvedJavaMethodImpl) { |
| HotSpotResolvedJavaMethodImpl that = (HotSpotResolvedJavaMethodImpl) obj; |
| return that.metaspaceMethod == metaspaceMethod; |
| } |
| return false; |
| } |
| |
| @Override |
| public int hashCode() { |
| return (int) metaspaceMethod; |
| } |
| |
| /** |
| * Returns this method's flags ({@code Method::_flags}). |
| * |
| * @return flags of this method |
| */ |
| private int getFlags() { |
| return UNSAFE.getShort(metaspaceMethod + config().methodFlagsOffset); |
| } |
| |
| /** |
| * Returns this method's constant method flags ({@code ConstMethod::_flags}). |
| * |
| * @return flags of this method's ConstMethod |
| */ |
| private int getConstMethodFlags() { |
| return UNSAFE.getChar(getConstMethod() + config().constMethodFlagsOffset); |
| } |
| |
| @Override |
| public HotSpotResolvedObjectTypeImpl getDeclaringClass() { |
| return holder; |
| } |
| |
| /** |
| * Gets the address of the C++ Method object for this method. |
| */ |
| public Constant getMetaspaceMethodConstant() { |
| return HotSpotMetaspaceConstantImpl.forMetaspaceObject(this, false); |
| } |
| |
| public long getMetaspacePointer() { |
| return metaspaceMethod; |
| } |
| |
| @Override |
| public Constant getEncoding() { |
| return getMetaspaceMethodConstant(); |
| } |
| |
| /** |
| * Gets the complete set of modifiers for this method which includes the JVM specification |
| * modifiers as well as the HotSpot internal modifiers. |
| */ |
| public int getAllModifiers() { |
| return UNSAFE.getInt(metaspaceMethod + config().methodAccessFlagsOffset); |
| } |
| |
| @Override |
| public int getModifiers() { |
| return getAllModifiers() & jvmMethodModifiers(); |
| } |
| |
| @Override |
| public boolean canBeStaticallyBound() { |
| return (isFinal() || isPrivate() || isStatic() || holder.isLeaf()) && isConcrete(); |
| } |
| |
| @Override |
| public byte[] getCode() { |
| if (getCodeSize() == 0) { |
| return null; |
| } |
| if (code == null && holder.isLinked()) { |
| code = compilerToVM().getBytecode(this); |
| assert code.length == getCodeSize() : "expected: " + getCodeSize() + ", actual: " + code.length; |
| } |
| return code; |
| } |
| |
| @Override |
| public int getCodeSize() { |
| return UNSAFE.getChar(getConstMethod() + config().constMethodCodeSizeOffset); |
| } |
| |
| @Override |
| public ExceptionHandler[] getExceptionHandlers() { |
| final boolean hasExceptionTable = (getConstMethodFlags() & config().constMethodHasExceptionTable) != 0; |
| if (!hasExceptionTable) { |
| return new ExceptionHandler[0]; |
| } |
| |
| HotSpotVMConfig config = config(); |
| final int exceptionTableLength = compilerToVM().getExceptionTableLength(this); |
| ExceptionHandler[] handlers = new ExceptionHandler[exceptionTableLength]; |
| long exceptionTableElement = compilerToVM().getExceptionTableStart(this); |
| |
| for (int i = 0; i < exceptionTableLength; i++) { |
| final int startPc = UNSAFE.getChar(exceptionTableElement + config.exceptionTableElementStartPcOffset); |
| final int endPc = UNSAFE.getChar(exceptionTableElement + config.exceptionTableElementEndPcOffset); |
| final int handlerPc = UNSAFE.getChar(exceptionTableElement + config.exceptionTableElementHandlerPcOffset); |
| int catchTypeIndex = UNSAFE.getChar(exceptionTableElement + config.exceptionTableElementCatchTypeIndexOffset); |
| |
| JavaType catchType; |
| if (catchTypeIndex == 0) { |
| catchType = null; |
| } else { |
| final int opcode = -1; // opcode is not used |
| catchType = constantPool.lookupType(catchTypeIndex, opcode); |
| |
| // Check for Throwable which catches everything. |
| if (catchType instanceof HotSpotResolvedObjectTypeImpl) { |
| HotSpotResolvedObjectTypeImpl resolvedType = (HotSpotResolvedObjectTypeImpl) catchType; |
| if (resolvedType.mirror() == Throwable.class) { |
| catchTypeIndex = 0; |
| catchType = null; |
| } |
| } |
| } |
| handlers[i] = new ExceptionHandler(startPc, endPc, handlerPc, catchTypeIndex, catchType); |
| |
| // Go to the next ExceptionTableElement |
| exceptionTableElement += config.exceptionTableElementSize; |
| } |
| |
| return handlers; |
| } |
| |
| /** |
| * Returns true if this method has a {@code CallerSensitive} annotation. |
| * |
| * @return true if CallerSensitive annotation present, false otherwise |
| */ |
| public boolean isCallerSensitive() { |
| return (getFlags() & config().methodFlagsCallerSensitive) != 0; |
| } |
| |
| /** |
| * Returns true if this method has a {@code ForceInline} annotation. |
| * |
| * @return true if ForceInline annotation present, false otherwise |
| */ |
| public boolean isForceInline() { |
| return (getFlags() & config().methodFlagsForceInline) != 0; |
| } |
| |
| /** |
| * Returns true if this method has a {@code ReservedStackAccess} annotation. |
| * |
| * @return true if ReservedStackAccess annotation present, false otherwise |
| */ |
| public boolean hasReservedStackAccess() { |
| return (getFlags() & config().methodFlagsReservedStackAccess) != 0; |
| } |
| |
| /** |
| * Manually adds a DontInline annotation to this method. |
| */ |
| public void setNotInlineable() { |
| compilerToVM().doNotInlineOrCompile(this); |
| } |
| |
| /** |
| * Returns true if this method is one of the special methods that is ignored by security stack |
| * walks. |
| * |
| * @return true if special method ignored by security stack walks, false otherwise |
| */ |
| public boolean ignoredBySecurityStackWalk() { |
| return compilerToVM().methodIsIgnoredBySecurityStackWalk(this); |
| } |
| |
| @Override |
| public boolean isClassInitializer() { |
| if (isStatic()) { |
| final int nameIndex = UNSAFE.getChar(getConstMethod() + config().constMethodNameIndexOffset); |
| long nameSymbol = constantPool.getEntryAt(nameIndex); |
| long clinitSymbol = config().symbolClinit; |
| return nameSymbol == clinitSymbol; |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean isConstructor() { |
| if (!isStatic()) { |
| final int nameIndex = UNSAFE.getChar(getConstMethod() + config().constMethodNameIndexOffset); |
| long nameSymbol = constantPool.getEntryAt(nameIndex); |
| long initSymbol = config().symbolInit; |
| return nameSymbol == initSymbol; |
| } |
| return false; |
| } |
| |
| @Override |
| public int getMaxLocals() { |
| if (isAbstract() || isNative()) { |
| return 0; |
| } |
| HotSpotVMConfig config = config(); |
| return UNSAFE.getChar(getConstMethod() + config.methodMaxLocalsOffset); |
| } |
| |
| @Override |
| public int getMaxStackSize() { |
| if (isAbstract() || isNative()) { |
| return 0; |
| } |
| HotSpotVMConfig config = config(); |
| return config.extraStackEntries + UNSAFE.getChar(getConstMethod() + config.constMethodMaxStackOffset); |
| } |
| |
| @Override |
| public StackTraceElement asStackTraceElement(int bci) { |
| if (bci < 0 || bci >= getCodeSize()) { |
| // HotSpot code can only construct stack trace elements for valid bcis |
| StackTraceElement ste = compilerToVM().getStackTraceElement(this, 0); |
| return new StackTraceElement(ste.getClassName(), ste.getMethodName(), ste.getFileName(), -1); |
| } |
| return compilerToVM().getStackTraceElement(this, bci); |
| } |
| |
| public ResolvedJavaMethod uniqueConcreteMethod(HotSpotResolvedObjectType receiver) { |
| if (receiver.isInterface()) { |
| // Cannot trust interfaces. Because of: |
| // interface I { void foo(); } |
| // class A { public void foo() {} } |
| // class B extends A implements I { } |
| // class C extends B { public void foo() { } } |
| // class D extends B { } |
| // Would lead to identify C.foo() as the unique concrete method for I.foo() without |
| // seeing A.foo(). |
| return null; |
| } |
| if (this.isDefault()) { |
| // CHA for default methods doesn't work and may crash the VM |
| return null; |
| } |
| return compilerToVM().findUniqueConcreteMethod(((HotSpotResolvedObjectTypeImpl) receiver), this); |
| } |
| |
| @Override |
| public HotSpotSignature getSignature() { |
| return signature; |
| } |
| |
| /** |
| * Gets the value of {@code Method::_code}. |
| * |
| * @return the value of {@code Method::_code} |
| */ |
| private long getCompiledCode() { |
| HotSpotVMConfig config = config(); |
| return UNSAFE.getAddress(metaspaceMethod + config.methodCodeOffset); |
| } |
| |
| /** |
| * Returns whether this method has compiled code. |
| * |
| * @return true if this method has compiled code, false otherwise |
| */ |
| public boolean hasCompiledCode() { |
| return getCompiledCode() != 0L; |
| } |
| |
| /** |
| * @param level |
| * @return true if the currently installed code was generated at {@code level}. |
| */ |
| public boolean hasCompiledCodeAtLevel(int level) { |
| long compiledCode = getCompiledCode(); |
| if (compiledCode != 0) { |
| return UNSAFE.getInt(compiledCode + config().nmethodCompLevelOffset) == level; |
| } |
| return false; |
| } |
| |
| @Override |
| public ProfilingInfo getProfilingInfo(boolean includeNormal, boolean includeOSR) { |
| ProfilingInfo info; |
| |
| if (Option.UseProfilingInformation.getBoolean() && methodData == null) { |
| long metaspaceMethodData = UNSAFE.getAddress(metaspaceMethod + config().methodDataOffset); |
| if (metaspaceMethodData != 0) { |
| methodData = new HotSpotMethodData(metaspaceMethodData, this); |
| String methodDataFilter = Option.TraceMethodDataFilter.getString(); |
| if (methodDataFilter != null && this.format("%H.%n").contains(methodDataFilter)) { |
| System.out.println(methodData.toString()); |
| } |
| } |
| } |
| |
| if (methodData == null || (!methodData.hasNormalData() && !methodData.hasExtraData())) { |
| // Be optimistic and return false for exceptionSeen. A methodDataOop is allocated in |
| // case of a deoptimization. |
| info = DefaultProfilingInfo.get(TriState.FALSE); |
| } else { |
| info = new HotSpotProfilingInfo(methodData, this, includeNormal, includeOSR); |
| } |
| return info; |
| } |
| |
| @Override |
| public void reprofile() { |
| compilerToVM().reprofile(this); |
| } |
| |
| @Override |
| public ConstantPool getConstantPool() { |
| return constantPool; |
| } |
| |
| @Override |
| public Parameter[] getParameters() { |
| Executable javaMethod = toJava(); |
| if (javaMethod == null) { |
| return null; |
| } |
| |
| java.lang.reflect.Parameter[] javaParameters = javaMethod.getParameters(); |
| Parameter[] res = new Parameter[javaParameters.length]; |
| for (int i = 0; i < res.length; i++) { |
| java.lang.reflect.Parameter src = javaParameters[i]; |
| String paramName = src.isNamePresent() ? src.getName() : null; |
| res[i] = new Parameter(paramName, src.getModifiers(), this, i); |
| } |
| return res; |
| } |
| |
| @Override |
| public Annotation[][] getParameterAnnotations() { |
| Executable javaMethod = toJava(); |
| return javaMethod == null ? new Annotation[signature.getParameterCount(false)][0] : javaMethod.getParameterAnnotations(); |
| } |
| |
| @Override |
| public Annotation[] getAnnotations() { |
| Executable javaMethod = toJava(); |
| if (javaMethod != null) { |
| return javaMethod.getAnnotations(); |
| } |
| return new Annotation[0]; |
| } |
| |
| @Override |
| public Annotation[] getDeclaredAnnotations() { |
| Executable javaMethod = toJava(); |
| if (javaMethod != null) { |
| return javaMethod.getDeclaredAnnotations(); |
| } |
| return new Annotation[0]; |
| } |
| |
| @Override |
| public <T extends Annotation> T getAnnotation(Class<T> annotationClass) { |
| Executable javaMethod = toJava(); |
| return javaMethod == null ? null : javaMethod.getAnnotation(annotationClass); |
| } |
| |
| public boolean isBridge() { |
| return (BRIDGE & getModifiers()) != 0; |
| } |
| |
| @Override |
| public boolean isSynthetic() { |
| return (SYNTHETIC & getModifiers()) != 0; |
| } |
| |
| public boolean isVarArgs() { |
| return (VARARGS & getModifiers()) != 0; |
| } |
| |
| public boolean isDefault() { |
| // Copied from java.lang.Method.isDefault() |
| int mask = Modifier.ABSTRACT | Modifier.PUBLIC | Modifier.STATIC; |
| return ((getModifiers() & mask) == Modifier.PUBLIC) && getDeclaringClass().isInterface(); |
| } |
| |
| @Override |
| public Type[] getGenericParameterTypes() { |
| Executable javaMethod = toJava(); |
| return javaMethod == null ? null : javaMethod.getGenericParameterTypes(); |
| } |
| |
| public Class<?>[] signatureToTypes() { |
| Signature sig = getSignature(); |
| int count = sig.getParameterCount(false); |
| Class<?>[] result = new Class<?>[count]; |
| for (int i = 0; i < result.length; ++i) { |
| JavaType parameterType = sig.getParameterType(i, holder); |
| HotSpotResolvedJavaType resolvedParameterType = (HotSpotResolvedJavaType) parameterType.resolve(holder); |
| result[i] = resolvedParameterType.mirror(); |
| } |
| return result; |
| } |
| |
| private static Method searchMethods(Method[] methods, String name, Class<?> returnType, Class<?>[] parameterTypes) { |
| for (Method m : methods) { |
| if (m.getName().equals(name) && returnType.equals(m.getReturnType()) && Arrays.equals(m.getParameterTypes(), parameterTypes)) { |
| return m; |
| } |
| } |
| return null; |
| } |
| |
| private Executable toJava() { |
| if (toJavaCache != null) { |
| return toJavaCache; |
| } |
| try { |
| Class<?>[] parameterTypes = signatureToTypes(); |
| Class<?> returnType = ((HotSpotResolvedJavaType) getSignature().getReturnType(holder).resolve(holder)).mirror(); |
| |
| Executable result; |
| if (isConstructor()) { |
| result = holder.mirror().getDeclaredConstructor(parameterTypes); |
| } else { |
| // Do not use Method.getDeclaredMethod() as it can return a bridge method |
| // when this.isBridge() is false and vice versa. |
| result = searchMethods(holder.mirror().getDeclaredMethods(), getName(), returnType, parameterTypes); |
| } |
| toJavaCache = result; |
| return result; |
| } catch (NoSuchMethodException | NoClassDefFoundError e) { |
| return null; |
| } |
| } |
| |
| @Override |
| public boolean canBeInlined() { |
| if (hasNeverInlineDirective()) { |
| return false; |
| } |
| return compilerToVM().isCompilable(this); |
| } |
| |
| @Override |
| public boolean hasNeverInlineDirective() { |
| return compilerToVM().hasNeverInlineDirective(this); |
| } |
| |
| @Override |
| public boolean shouldBeInlined() { |
| if (isForceInline()) { |
| return true; |
| } |
| return compilerToVM().shouldInlineMethod(this); |
| } |
| |
| @Override |
| public LineNumberTable getLineNumberTable() { |
| final boolean hasLineNumberTable = (getConstMethodFlags() & config().constMethodHasLineNumberTable) != 0; |
| if (!hasLineNumberTable) { |
| return null; |
| } |
| |
| long[] values = compilerToVM().getLineNumberTable(this); |
| if (values == null || values.length == 0) { |
| // Empty table so treat is as non-existent |
| return null; |
| } |
| assert values.length % 2 == 0; |
| int[] bci = new int[values.length / 2]; |
| int[] line = new int[values.length / 2]; |
| |
| for (int i = 0; i < values.length / 2; i++) { |
| bci[i] = (int) values[i * 2]; |
| line[i] = (int) values[i * 2 + 1]; |
| } |
| |
| return new LineNumberTable(line, bci); |
| } |
| |
| @Override |
| public LocalVariableTable getLocalVariableTable() { |
| final boolean hasLocalVariableTable = (getConstMethodFlags() & config().constMethodHasLocalVariableTable) != 0; |
| if (!hasLocalVariableTable) { |
| return null; |
| } |
| |
| HotSpotVMConfig config = config(); |
| long localVariableTableElement = compilerToVM().getLocalVariableTableStart(this); |
| final int localVariableTableLength = compilerToVM().getLocalVariableTableLength(this); |
| Local[] locals = new Local[localVariableTableLength]; |
| |
| for (int i = 0; i < localVariableTableLength; i++) { |
| final int startBci = UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementStartBciOffset); |
| final int endBci = startBci + UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementLengthOffset); |
| final int nameCpIndex = UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementNameCpIndexOffset); |
| final int typeCpIndex = UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementDescriptorCpIndexOffset); |
| final int slot = UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementSlotOffset); |
| |
| String localName = getConstantPool().lookupUtf8(nameCpIndex); |
| String localType = getConstantPool().lookupUtf8(typeCpIndex); |
| |
| locals[i] = new Local(localName, runtime().lookupType(localType, holder, false), startBci, endBci, slot); |
| |
| // Go to the next LocalVariableTableElement |
| localVariableTableElement += config.localVariableTableElementSize; |
| } |
| |
| return new LocalVariableTable(locals); |
| } |
| |
| /** |
| * Returns the offset of this method into the v-table. The method must have a v-table entry as |
| * indicated by {@link #isInVirtualMethodTable(ResolvedJavaType)}, otherwise an exception is |
| * thrown. |
| * |
| * @return the offset of this method into the v-table |
| */ |
| public int vtableEntryOffset(ResolvedJavaType resolved) { |
| if (!isInVirtualMethodTable(resolved)) { |
| throw new JVMCIError("%s does not have a vtable entry in type %s", this, resolved); |
| } |
| HotSpotVMConfig config = config(); |
| final int vtableIndex = getVtableIndex((HotSpotResolvedObjectTypeImpl) resolved); |
| return config.klassVtableStartOffset + vtableIndex * config.vtableEntrySize + config.vtableEntryMethodOffset; |
| } |
| |
| @Override |
| public boolean isInVirtualMethodTable(ResolvedJavaType resolved) { |
| if (resolved instanceof HotSpotResolvedObjectTypeImpl) { |
| HotSpotResolvedObjectTypeImpl hotspotResolved = (HotSpotResolvedObjectTypeImpl) resolved; |
| int vtableIndex = getVtableIndex(hotspotResolved); |
| return vtableIndex >= 0 && vtableIndex < hotspotResolved.getVtableLength(); |
| } |
| return false; |
| } |
| |
| private int getVtableIndex(HotSpotResolvedObjectTypeImpl resolved) { |
| if (!holder.isLinked()) { |
| return config().invalidVtableIndex; |
| } |
| if (holder.isInterface()) { |
| if (resolved.isInterface()) { |
| return config().invalidVtableIndex; |
| } |
| return getVtableIndexForInterfaceMethod(resolved); |
| } |
| return getVtableIndex(); |
| } |
| |
| /** |
| * Returns this method's virtual table index. |
| * |
| * @return virtual table index |
| */ |
| private int getVtableIndex() { |
| assert !holder.isInterface(); |
| HotSpotVMConfig config = config(); |
| int result = UNSAFE.getInt(metaspaceMethod + config.methodVtableIndexOffset); |
| assert result >= config.nonvirtualVtableIndex : "must be linked"; |
| return result; |
| } |
| |
| private int getVtableIndexForInterfaceMethod(ResolvedJavaType resolved) { |
| HotSpotResolvedObjectTypeImpl hotspotType = (HotSpotResolvedObjectTypeImpl) resolved; |
| return compilerToVM().getVtableIndexForInterfaceMethod(hotspotType, this); |
| } |
| |
| /** |
| * The {@link SpeculationLog} for methods compiled by JVMCI hang off this per-declaring-type |
| * {@link ClassValue}. The raw Method* value is safe to use as a key in the map as a) it is |
| * never moves and b) we never read from it. |
| * <p> |
| * One implication is that we will preserve {@link SpeculationLog}s for methods that have been |
| * redefined via class redefinition. It's tempting to periodically flush such logs but we cannot |
| * read the JVM_ACC_IS_OBSOLETE bit (or anything else) via the raw pointer as obsoleted methods |
| * are subject to clean up and deletion (see InstanceKlass::purge_previous_versions_internal). |
| */ |
| private static final ClassValue<Map<Long, SpeculationLog>> SpeculationLogs = new ClassValue<Map<Long, SpeculationLog>>() { |
| @Override |
| protected Map<Long, SpeculationLog> computeValue(java.lang.Class<?> type) { |
| return new HashMap<>(4); |
| } |
| }; |
| |
| public SpeculationLog getSpeculationLog() { |
| Map<Long, SpeculationLog> map = SpeculationLogs.get(holder.mirror()); |
| synchronized (map) { |
| SpeculationLog log = map.get(this.metaspaceMethod); |
| if (log == null) { |
| log = new HotSpotSpeculationLog(); |
| map.put(metaspaceMethod, log); |
| } |
| return log; |
| } |
| } |
| |
| public int intrinsicId() { |
| HotSpotVMConfig config = config(); |
| return UNSAFE.getChar(metaspaceMethod + config.methodIntrinsicIdOffset); |
| } |
| |
| public boolean isIntrinsicCandidate() { |
| return (getFlags() & config().methodFlagsIntrinsicCandidate) != 0; |
| } |
| |
| /** |
| * Allocates a compile id for this method by asking the VM for one. |
| * |
| * @param entryBCI entry bci |
| * @return compile id |
| */ |
| public int allocateCompileId(int entryBCI) { |
| return compilerToVM().allocateCompileId(this, entryBCI); |
| } |
| |
| public boolean hasCodeAtLevel(int entryBCI, int level) { |
| if (entryBCI == config().invocationEntryBci) { |
| return hasCompiledCodeAtLevel(level); |
| } |
| return compilerToVM().hasCompiledCodeForOSR(this, entryBCI, level); |
| } |
| } |
