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/* ******************************************************************* |
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/* ******************************************************************* |
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* Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC). |
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* Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC). |
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* All rights reserved. |
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* This program and the accompanying materials are made available |
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* under the terms of the Eclipse Public License v1.0 |
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* which accompanies this distribution and is available at |
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* http://www.eclipse.org/legal/epl-v10.html |
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* |
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* Contributors: |
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* PARC initial implementation |
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* All rights reserved. |
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* This program and the accompanying materials are made available |
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* under the terms of the Eclipse Public License v1.0 |
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* which accompanies this distribution and is available at |
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* http://www.eclipse.org/legal/epl-v10.html |
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* |
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* Contributors: |
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* PARC initial implementation |
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* ******************************************************************/ |
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* ******************************************************************/ |
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package org.aspectj.weaver.bcel; |
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package org.aspectj.weaver.bcel; |
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import java.lang.reflect.Modifier; |
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import java.lang.reflect.Modifier; |
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import java.util.LinkedHashSet; |
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import java.util.LinkedHashSet; |
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import java.util.List; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.Map; |
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import java.util.Objects; |
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import java.util.Properties; |
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import java.util.Properties; |
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import java.util.Set; |
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import java.util.Set; |
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import java.util.Objects; |
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import org.aspectj.apache.bcel.Constants; |
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import org.aspectj.apache.bcel.Constants; |
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import org.aspectj.apache.bcel.classfile.BootstrapMethods; |
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import org.aspectj.apache.bcel.classfile.BootstrapMethods; |
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private static Trace trace = TraceFactory.getTraceFactory().getTrace(BcelClassWeaver.class); |
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private static Trace trace = TraceFactory.getTraceFactory().getTrace(BcelClassWeaver.class); |
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// Name of helper method generated by JDT compiler. Javac uses a separate inner class. |
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private static final String SWITCH_TABLE_SYNTHETIC_METHOD_PREFIX = "$SWITCH_TABLE$"; |
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private static final String SWITCH_TABLE_SYNTHETIC_METHOD_PREFIX = "$SWITCH_TABLE$"; |
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public static boolean weave(BcelWorld world, LazyClassGen clazz, List<ShadowMunger> shadowMungers, |
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public static boolean weave(BcelWorld world, LazyClassGen clazz, List<ShadowMunger> shadowMungers, |
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/** |
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/** |
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* Weave a class and indicate through the return value whether the class was modified. |
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* Weave a class and indicate through the return value whether the class was modified. |
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* |
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* |
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* @return true if the class was modified |
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* @return true if the class was modified |
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*/ |
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*/ |
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public boolean weave() { |
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public boolean weave() { |
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// FIXASC refactor into ResolvedType or even ResolvedMember? |
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// FIXASC refactor into ResolvedType or even ResolvedMember? |
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/** |
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/** |
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* Check if a particular method is overriding another - refactored into this helper so it can be used from multiple places. |
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* Check if a particular method is overriding another - refactored into this helper so it can be used from multiple places. |
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* @return method that is overriding if it |
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* @return method that is overriding if it |
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*/ |
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*/ |
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private static ResolvedMember isOverriding(ResolvedType typeToCheck, ResolvedMember methodThatMightBeGettingOverridden, |
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private static ResolvedMember isOverriding(ResolvedType typeToCheck, ResolvedMember methodThatMightBeGettingOverridden, |
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String mname, String mrettype, int mmods, boolean inSamePackage, UnresolvedType[] methodParamsArray) { |
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String mname, String mrettype, int mmods, boolean inSamePackage, UnresolvedType[] methodParamsArray) { |
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/** |
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/** |
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* Looks at the visibility modifiers between two methods, and knows whether they are from classes in the same package, and |
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* Looks at the visibility modifiers between two methods, and knows whether they are from classes in the same package, and |
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* decides whether one overrides the other. |
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* decides whether one overrides the other. |
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* |
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* |
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* @return true if there is an overrides rather than a 'hides' relationship |
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* @return true if there is an overrides rather than a 'hides' relationship |
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*/ |
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*/ |
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static boolean isVisibilityOverride(int methodMods, ResolvedMember inheritedMethod, boolean inSamePackage) { |
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static boolean isVisibilityOverride(int methodMods, ResolvedMember inheritedMethod, boolean inSamePackage) { |
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/** |
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/** |
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* This method recurses up a specified type looking for a method that overrides the one passed in. |
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* This method recurses up a specified type looking for a method that overrides the one passed in. |
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* |
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* |
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* @return the method being overridden or null if none is found |
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* @return the method being overridden or null if none is found |
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*/ |
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*/ |
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public static void checkForOverride(ResolvedType typeToCheck, String mname, String mparams, String mrettype, |
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public static void checkForOverride(ResolvedType typeToCheck, String mname, String mparams, String mrettype, |
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if (typeToCheck instanceof MissingResolvedTypeWithKnownSignature) { |
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if (typeToCheck instanceof MissingResolvedTypeWithKnownSignature) { |
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return; // we just can't tell ! |
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return; // we just can't tell ! |
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} |
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} |
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if (typeToCheck.getWorld().forDEBUG_bridgingCode) { |
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if (typeToCheck.getWorld().forDEBUG_bridgingCode) { |
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System.err.println(" Bridging:checking for override of " + mname + " in " + typeToCheck); |
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System.err.println(" Bridging:checking for override of " + mname + " in " + typeToCheck); |
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packageName = ""; |
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packageName = ""; |
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} |
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} |
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// used when looking at visibility rules |
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// used when looking at visibility rules |
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boolean inSamePackage = packageName.equals(mpkg); |
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boolean inSamePackage = packageName.equals(mpkg); |
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ResolvedMember[] methods = typeToCheck.getDeclaredMethods(); |
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ResolvedMember[] methods = typeToCheck.getDeclaredMethods(); |
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for (int ii = 0; ii < methods.length; ii++) { |
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for (int ii = 0; ii < methods.length; ii++) { |
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// the method we are going to check |
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// the method we are going to check |
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ResolvedMember methodThatMightBeGettingOverridden = methods[ii]; |
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ResolvedMember methodThatMightBeGettingOverridden = methods[ii]; |
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ResolvedMember isOverriding = isOverriding(typeToCheck, methodThatMightBeGettingOverridden, mname, mrettype, mmods, |
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ResolvedMember isOverriding = isOverriding(typeToCheck, methodThatMightBeGettingOverridden, mname, mrettype, mmods, |
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inSamePackage, methodParamsArray); |
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inSamePackage, methodParamsArray); |
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if (isOverriding != null) { |
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if (isOverriding != null) { |
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ResolvedType superclass = typeToCheck.getSuperclass(); |
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ResolvedType superclass = typeToCheck.getSuperclass(); |
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checkForOverride(superclass, mname, mparams, mrettype, mmods, mpkg, methodParamsArray,overriddenMethodsCollector); |
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checkForOverride(superclass, mname, mparams, mrettype, mmods, mpkg, methodParamsArray,overriddenMethodsCollector); |
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ResolvedType[] interfaces = typeToCheck.getDeclaredInterfaces(); |
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ResolvedType[] interfaces = typeToCheck.getDeclaredInterfaces(); |
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for (int i = 0; i < interfaces.length; i++) { |
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for (int i = 0; i < interfaces.length; i++) { |
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ResolvedType anInterface = interfaces[i]; |
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ResolvedType anInterface = interfaces[i]; |
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* We need to determine if any methods in this type require bridge methods - this method should only be called if necessary to |
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* We need to determine if any methods in this type require bridge methods - this method should only be called if necessary to |
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* do this calculation, i.e. we are on a 1.5 VM (where covariance/generics exist) and the type hierarchy for the specified class |
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* do this calculation, i.e. we are on a 1.5 VM (where covariance/generics exist) and the type hierarchy for the specified class |
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* has changed (via decp/itd). |
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* has changed (via decp/itd). |
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* |
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* |
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* See pr108101 |
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* See pr108101 |
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*/ |
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*/ |
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public static boolean calculateAnyRequiredBridgeMethods(BcelWorld world, LazyClassGen clazz) { |
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public static boolean calculateAnyRequiredBridgeMethods(BcelWorld world, LazyClassGen clazz) { |
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world.ensureAdvancedConfigurationProcessed(); |
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world.ensureAdvancedConfigurationProcessed(); |
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if (!world.isInJava5Mode()) { |
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if (!world.isInJava5Mode()) { |
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return false; // just double check... the caller should have already |
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return false; // just double check... the caller should have already |
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} |
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} |
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if (clazz.isInterface()) { |
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if (clazz.isInterface()) { |
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return false; // dont bother if we are an interface |
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return false; // dont bother if we are an interface |
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} |
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} |
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boolean didSomething = false; // set if we build any bridge methods |
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boolean didSomething = false; // set if we build any bridge methods |
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// So what methods do we have right now in this class? |
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// So what methods do we have right now in this class? |
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List<LazyMethodGen> methods = clazz.getMethodGens(); |
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List<LazyMethodGen> methods = clazz.getMethodGens(); |
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if (decaMs.isEmpty()) { |
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if (decaMs.isEmpty()) { |
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return false; // nothing to do |
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return false; // nothing to do |
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} |
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} |
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Set<DeclareAnnotation> unusedDecams = new HashSet<DeclareAnnotation>(); |
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Set<DeclareAnnotation> unusedDecams = new HashSet<DeclareAnnotation>(); |
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unusedDecams.addAll(decaMs); |
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unusedDecams.addAll(decaMs); |
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if (addedLazyMethodGens!=null) { |
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if (addedLazyMethodGens!=null) { |
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for (LazyMethodGen method: addedLazyMethodGens) { |
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for (LazyMethodGen method: addedLazyMethodGens) { |
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// They have no resolvedmember of their own, conjure one up for matching purposes |
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// They have no resolvedmember of their own, conjure one up for matching purposes |
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ResolvedMember resolvedmember = |
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ResolvedMember resolvedmember = |
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new ResolvedMemberImpl(ResolvedMember.METHOD,method.getEnclosingClass().getType(),method.getAccessFlags(), |
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new ResolvedMemberImpl(ResolvedMember.METHOD,method.getEnclosingClass().getType(),method.getAccessFlags(), |
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BcelWorld.fromBcel(method.getReturnType()),method.getName(), |
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BcelWorld.fromBcel(method.getReturnType()),method.getName(), |
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BcelWorld.fromBcel(method.getArgumentTypes()),UnresolvedType.forNames(method.getDeclaredExceptions())); |
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BcelWorld.fromBcel(method.getArgumentTypes()),UnresolvedType.forNames(method.getDeclaredExceptions())); |
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unusedDecams.remove(decam); |
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unusedDecams.remove(decam); |
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} else if (!decam.isStarredAnnotationPattern()) { |
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} else if (!decam.isStarredAnnotationPattern()) { |
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// an annotation is specified that might be put on by a subsequent decaf |
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// an annotation is specified that might be put on by a subsequent decaf |
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worthRetrying.add(decam); |
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worthRetrying.add(decam); |
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} |
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} |
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} |
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} |
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} |
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} |
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} |
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} |
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} |
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} |
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// deal with all the other methods... |
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// deal with all the other methods... |
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List<LazyMethodGen> members = clazz.getMethodGens(); |
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List<LazyMethodGen> members = clazz.getMethodGens(); |
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if (!members.isEmpty()) { |
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if (!members.isEmpty()) { |
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/** |
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/** |
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* Applies some set of declare @field constructs (List<DeclareAnnotation>) to some bunch of ITDfields (List<BcelTypeMunger>. It |
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* Applies some set of declare @field constructs (List<DeclareAnnotation>) to some bunch of ITDfields (List<BcelTypeMunger>. It |
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* will iterate over the fields repeatedly until everything has been applied. |
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* will iterate over the fields repeatedly until everything has been applied. |
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* |
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* |
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*/ |
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*/ |
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private boolean weaveAtFieldRepeatedly(List<DeclareAnnotation> decaFs, List<ConcreteTypeMunger> itdFields, |
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private boolean weaveAtFieldRepeatedly(List<DeclareAnnotation> decaFs, List<ConcreteTypeMunger> itdFields, |
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List<Integer> reportedErrors) { |
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List<Integer> reportedErrors) { |
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// skip it for now |
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// skip it for now |
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/** |
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/** |
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* Weave any declare @field statements into the fields of the supplied class. This will attempt to apply them to the ITDs too. |
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* Weave any declare @field statements into the fields of the supplied class. This will attempt to apply them to the ITDs too. |
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* |
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* |
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* Interesting case relating to public ITDd fields. The annotations are really stored against the interfieldinit method in the |
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* Interesting case relating to public ITDd fields. The annotations are really stored against the interfieldinit method in the |
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* aspect, but the public field is placed in the target type and then is processed in the 2nd pass over fields that occurs. I |
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* aspect, but the public field is placed in the target type and then is processed in the 2nd pass over fields that occurs. I |
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* think it would be more expensive to avoid putting the annotation on that inserted public field than just to have it put there |
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* think it would be more expensive to avoid putting the annotation on that inserted public field than just to have it put there |
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/** |
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/** |
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* inline a particular call in bytecode. |
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* inline a particular call in bytecode. |
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* |
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* |
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* @param donor the method we want to inline |
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* @param donor the method we want to inline |
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* @param recipient the method containing the call we want to inline |
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* @param recipient the method containing the call we want to inline |
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* @param call the instructionHandle in recipient's body holding the call we want to inline. |
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* @param call the instructionHandle in recipient's body holding the call we want to inline. |
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/* |
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/* |
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* Implementation notes: |
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* Implementation notes: |
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* |
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* |
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* We allocate two slots for every tempvar so we don't screw up longs and doubles which may share space. This could be |
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* We allocate two slots for every tempvar so we don't screw up longs and doubles which may share space. This could be |
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* conservatively avoided (no reference to a long/double instruction, don't do it) or packed later. Right now we don't |
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* conservatively avoided (no reference to a long/double instruction, don't do it) or packed later. Right now we don't |
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* bother to pack. |
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* bother to pack. |
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* |
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* |
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* Allocate a new var for each formal param of the inlined. Fill with stack contents. Then copy the inlined instructions in |
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* Allocate a new var for each formal param of the inlined. Fill with stack contents. Then copy the inlined instructions in |
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* with the appropriate remap table. Any framelocs used by locals in inlined are reallocated to top of frame, |
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* with the appropriate remap table. Any framelocs used by locals in inlined are reallocated to top of frame, |
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*/ |
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*/ |
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/** |
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/** |
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* Input method is a synchronized method, we remove the bit flag for synchronized and then insert a try..finally block |
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* Input method is a synchronized method, we remove the bit flag for synchronized and then insert a try..finally block |
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* |
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* |
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* Some jumping through firey hoops required - depending on the input code level (1.5 or not) we may or may not be able to use |
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* Some jumping through firey hoops required - depending on the input code level (1.5 or not) we may or may not be able to use |
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* the LDC instruction that takes a class literal (doesnt on <1.5). |
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* the LDC instruction that takes a class literal (doesnt on <1.5). |
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* |
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* |
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* FIXME asc Before promoting -Xjoinpoints:synchronization to be a standard option, this needs a bunch of tidying up - there is |
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* FIXME asc Before promoting -Xjoinpoints:synchronization to be a standard option, this needs a bunch of tidying up - there is |
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* some duplication that can be removed. |
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* some duplication that can be removed. |
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*/ |
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*/ |
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/** |
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/** |
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* generate the instructions to be inlined. |
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* generate the instructions to be inlined. |
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* |
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* |
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* @param donor the method from which we will copy (and adjust frame and jumps) instructions. |
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* @param donor the method from which we will copy (and adjust frame and jumps) instructions. |
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* @param recipient the method the instructions will go into. Used to get the frame size so we can allocate new frame locations |
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* @param recipient the method the instructions will go into. Used to get the frame size so we can allocate new frame locations |
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* for locals in donor. |
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* for locals in donor. |
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// } |
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// } |
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// } |
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// } |
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// } |
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// } |
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// BootstrapMethods.BootstrapMethod bootstrapMethod = |
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// BootstrapMethods.BootstrapMethod bootstrapMethod = |
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// bootstrapMethods.getBootstrapMethods()[bmaIndex]; |
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// bootstrapMethods.getBootstrapMethods()[bmaIndex]; |
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// ConstantMethodHandle methodhandle = (ConstantMethodHandle)donorCpg.getConstant(bootstrapMethod.getBootstrapMethodRef()); |
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// ConstantMethodHandle methodhandle = (ConstantMethodHandle)donorCpg.getConstant(bootstrapMethod.getBootstrapMethodRef()); |
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// int bootstrapMethodArguments[] = bootstrapMethod.getBootstrapArguments(); |
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// int bootstrapMethodArguments[] = bootstrapMethod.getBootstrapArguments(); |
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// |
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// |
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// // Finally have all we need to build the new one... |
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// // Finally have all we need to build the new one... |
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// |
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// |
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// int newMethodHandleIndex = recipientCpg.addConstant(methodhandle, donorCpg); |
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// int newMethodHandleIndex = recipientCpg.addConstant(methodhandle, donorCpg); |
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// int[] newMethodArguments = new int[bootstrapMethodArguments.length]; |
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// int[] newMethodArguments = new int[bootstrapMethodArguments.length]; |
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// for (int a=0; a<bootstrapMethodArguments.length; a++) { |
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// for (int a=0; a<bootstrapMethodArguments.length; a++) { |
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// newMethodArguments[a] = recipientCpg.addConstant(donorCpg.getConstant(bootstrapMethodArguments[a]),donorCpg); |
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// newMethodArguments[a] = recipientCpg.addConstant(donorCpg.getConstant(bootstrapMethodArguments[a]),donorCpg); |
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// } |
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// } |
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// BootstrapMethods.BootstrapMethod newBootstrapMethod = |
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// BootstrapMethods.BootstrapMethod newBootstrapMethod = |
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// new BootstrapMethods.BootstrapMethod(newMethodHandleIndex,newMethodArguments); |
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// new BootstrapMethods.BootstrapMethod(newMethodHandleIndex,newMethodArguments); |
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// |
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// |
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// Collection<Attribute> newAttributes = recipient.getEnclosingClass().getAttributes(); |
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// Collection<Attribute> newAttributes = recipient.getEnclosingClass().getAttributes(); |
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// BootstrapMethods newBootstrapMethods = null; |
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// BootstrapMethods newBootstrapMethods = null; |
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// for (Attribute attr: newAttributes) { |
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// for (Attribute attr: newAttributes) { |
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// } |
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// } |
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// } |
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// } |
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// if (newBootstrapMethods == null) { |
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// if (newBootstrapMethods == null) { |
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// newBootstrapMethods = |
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// newBootstrapMethods = |
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// new BootstrapMethods(recipientCpg.addUtf8("BootstrapMethods"), |
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// new BootstrapMethods(recipientCpg.addUtf8("BootstrapMethods"), |
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// 2+newBootstrapMethod.getLength(), |
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// 2+newBootstrapMethod.getLength(), |
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// new BootstrapMethods.BootstrapMethod[] {newBootstrapMethod}, |
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// new BootstrapMethods.BootstrapMethod[] {newBootstrapMethod}, |
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// } |
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// } |
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// TODO need to copy over lambda$0 support methods too... |
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// TODO need to copy over lambda$0 support methods too... |
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// } |
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// } |
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// |
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// |
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// } |
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// } |
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} |
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} |
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if (src.getInstruction() == Range.RANGEINSTRUCTION) { |
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if (src.getInstruction() == Range.RANGEINSTRUCTION) { |
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/** |
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/** |
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* generate the argument stores in preparation for inlining. |
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* generate the argument stores in preparation for inlining. |
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* |
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* |
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* @param donor the method we will inline from. Used to get the signature. |
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* @param donor the method we will inline from. Used to get the signature. |
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* @param recipient the method we will inline into. Used to get the frame size so we can allocate fresh locations. |
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* @param recipient the method we will inline into. Used to get the frame size so we can allocate fresh locations. |
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* @param frameEnv an empty environment we populate with a map from donor frame to recipient frame. |
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* @param frameEnv an empty environment we populate with a map from donor frame to recipient frame. |
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/** |
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/** |
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* get a called method: Assumes the called method is in this class, and the reference to it is exact (a la INVOKESPECIAL). |
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* get a called method: Assumes the called method is in this class, and the reference to it is exact (a la INVOKESPECIAL). |
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* |
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* |
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* @param ih The InvokeInstruction instructionHandle pointing to the called method. |
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* @param ih The InvokeInstruction instructionHandle pointing to the called method. |
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*/ |
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*/ |
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private LazyMethodGen getCalledMethod(InstructionHandle ih) { |
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private LazyMethodGen getCalledMethod(InstructionHandle ih) { |
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/** |
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/** |
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* Find the specified member in the specified type. |
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* Find the specified member in the specified type. |
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* |
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* |
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* @param type the type to search for the member |
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* @param type the type to search for the member |
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* @param methodName the name of the method to find |
|
|
* @param methodName the name of the method to find |
|
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* @param params the method parameters that the discovered method should have |
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* @param params the method parameters that the discovered method should have |
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* For a given resolvedmember, this will discover the real annotations for it. <b>Should only be used when the resolvedmember is |
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* For a given resolvedmember, this will discover the real annotations for it. <b>Should only be used when the resolvedmember is |
|
|
* the contents of an effective signature attribute, as thats the only time when the annotations aren't stored directly in the |
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|
* the contents of an effective signature attribute, as thats the only time when the annotations aren't stored directly in the |
|
|
* resolvedMember</b> |
|
|
* resolvedMember</b> |
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* |
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* |
|
|
* @param rm the sig we want it to pretend to be 'int A.m()' or somesuch ITD like thing |
|
|
* @param rm the sig we want it to pretend to be 'int A.m()' or somesuch ITD like thing |
|
|
* @param declaredSig the real sig 'blah.ajc$xxx' |
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|
* @param declaredSig the real sig 'blah.ajc$xxx' |
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*/ |
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*/ |
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* For a given resolvedmember, this will discover the real annotations for it. <b>Should only be used when the resolvedmember is |
|
|
* For a given resolvedmember, this will discover the real annotations for it. <b>Should only be used when the resolvedmember is |
|
|
* the contents of an effective signature attribute, as thats the only time when the annotations aren't stored directly in the |
|
|
* the contents of an effective signature attribute, as thats the only time when the annotations aren't stored directly in the |
|
|
* resolvedMember</b> |
|
|
* resolvedMember</b> |
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* |
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* |
|
|
* @param rm the sig we want it to pretend to be 'int A.m()' or somesuch ITD like thing |
|
|
* @param rm the sig we want it to pretend to be 'int A.m()' or somesuch ITD like thing |
|
|
* @param declaredSig the real sig 'blah.ajc$xxx' |
|
|
* @param declaredSig the real sig 'blah.ajc$xxx' |
|
|
*/ |
|
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*/ |
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} |
|
|
} |
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|
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if (methodName.startsWith(SWITCH_TABLE_SYNTHETIC_METHOD_PREFIX)) { |
|
|
if (methodName.startsWith(SWITCH_TABLE_SYNTHETIC_METHOD_PREFIX)) { |
|
|
// we shouldn't process calls to synthetic methods (since they're not 'declared') |
|
|
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|
|
proceed = false; |
|
|
proceed = false; |
|
|
} |
|
|
} |
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Andy Clement
4 years ago