| // Copyright (c) 2020, the R8 project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| package com.android.tools.r8.horizontalclassmerging; |
| |
| import com.android.tools.r8.graph.AppView; |
| import com.android.tools.r8.graph.DexEncodedMember; |
| import com.android.tools.r8.graph.DexField; |
| import com.android.tools.r8.graph.DexMember; |
| import com.android.tools.r8.graph.DexMethod; |
| import com.android.tools.r8.graph.DexType; |
| import com.android.tools.r8.graph.NestedGraphLens; |
| import com.android.tools.r8.graph.ProgramMethod; |
| import com.android.tools.r8.ir.conversion.ExtraParameter; |
| import com.android.tools.r8.utils.IterableUtils; |
| import com.android.tools.r8.utils.collections.BidirectionalManyToOneHashMap; |
| import com.android.tools.r8.utils.collections.BidirectionalManyToOneRepresentativeHashMap; |
| import com.android.tools.r8.utils.collections.BidirectionalManyToOneRepresentativeMap; |
| import com.android.tools.r8.utils.collections.MutableBidirectionalManyToOneMap; |
| import com.android.tools.r8.utils.collections.MutableBidirectionalManyToOneRepresentativeMap; |
| import com.google.common.collect.Iterables; |
| import com.google.common.collect.Streams; |
| import java.util.ArrayList; |
| import java.util.IdentityHashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| public class HorizontalClassMergerGraphLens extends NestedGraphLens { |
| |
| private final Map<DexMethod, List<ExtraParameter>> methodExtraParameters; |
| private final HorizontallyMergedClasses mergedClasses; |
| |
| private HorizontalClassMergerGraphLens( |
| AppView<?> appView, |
| HorizontallyMergedClasses mergedClasses, |
| Map<DexMethod, List<ExtraParameter>> methodExtraParameters, |
| BidirectionalManyToOneRepresentativeMap<DexField, DexField> fieldMap, |
| Map<DexMethod, DexMethod> methodMap, |
| BidirectionalManyToOneRepresentativeMap<DexMethod, DexMethod> newMethodSignatures) { |
| super(appView, fieldMap, methodMap, mergedClasses.getForwardMap(), newMethodSignatures); |
| this.methodExtraParameters = methodExtraParameters; |
| this.mergedClasses = mergedClasses; |
| } |
| |
| @Override |
| public boolean isHorizontalClassMergerGraphLens() { |
| return true; |
| } |
| |
| @Override |
| protected Iterable<DexType> internalGetOriginalTypes(DexType previous) { |
| return IterableUtils.prependSingleton(previous, mergedClasses.getSourcesFor(previous)); |
| } |
| |
| /** |
| * If an overloaded constructor is requested, add the constructor id as a parameter to the |
| * constructor. Otherwise return the lookup on the underlying graph lens. |
| */ |
| @Override |
| public MethodLookupResult internalDescribeLookupMethod( |
| MethodLookupResult previous, DexMethod context) { |
| List<ExtraParameter> extraParameters = methodExtraParameters.get(previous.getReference()); |
| MethodLookupResult lookup = super.internalDescribeLookupMethod(previous, context); |
| if (extraParameters == null) { |
| return lookup; |
| } |
| return MethodLookupResult.builder(this) |
| .setReference(lookup.getReference()) |
| .setPrototypeChanges(lookup.getPrototypeChanges().withExtraParameters(extraParameters)) |
| .setType(lookup.getType()) |
| .build(); |
| } |
| |
| @Override |
| protected FieldLookupResult internalDescribeLookupField(FieldLookupResult previous) { |
| FieldLookupResult lookup = super.internalDescribeLookupField(previous); |
| if (lookup.getReference() == previous.getReference()) { |
| return lookup; |
| } |
| return FieldLookupResult.builder(this) |
| .setReference(lookup.getReference()) |
| .setReboundReference(lookup.getReboundReference()) |
| .setReadCastType( |
| lookup.getReference().getType() != previous.getReference().getType() |
| ? lookupType(previous.getReference().getType()) |
| : null) |
| .setWriteCastType(previous.getRewrittenWriteCastType(this::internalDescribeLookupClassType)) |
| .build(); |
| } |
| |
| public static class Builder { |
| |
| private final MutableBidirectionalManyToOneRepresentativeMap<DexField, DexField> |
| newFieldSignatures = BidirectionalManyToOneRepresentativeHashMap.newIdentityHashMap(); |
| private final MutableBidirectionalManyToOneMap<DexMethod, DexMethod> methodMap = |
| BidirectionalManyToOneHashMap.newIdentityHashMap(); |
| private final MutableBidirectionalManyToOneRepresentativeMap<DexMethod, DexMethod> |
| newMethodSignatures = BidirectionalManyToOneRepresentativeHashMap.newIdentityHashMap(); |
| private final Map<DexMethod, List<ExtraParameter>> methodExtraParameters = |
| new IdentityHashMap<>(); |
| |
| private final MutableBidirectionalManyToOneMap<DexMethod, DexMethod> pendingMethodMapUpdates = |
| BidirectionalManyToOneHashMap.newIdentityHashMap(); |
| private final MutableBidirectionalManyToOneRepresentativeMap<DexField, DexField> |
| pendingNewFieldSignatureUpdates = |
| BidirectionalManyToOneRepresentativeHashMap.newIdentityHashMap(); |
| private final MutableBidirectionalManyToOneRepresentativeMap<DexMethod, DexMethod> |
| pendingNewMethodSignatureUpdates = |
| BidirectionalManyToOneRepresentativeHashMap.newIdentityHashMap(); |
| |
| Builder() {} |
| |
| HorizontalClassMergerGraphLens build( |
| AppView<?> appView, HorizontallyMergedClasses mergedClasses) { |
| assert pendingMethodMapUpdates.isEmpty(); |
| assert pendingNewFieldSignatureUpdates.isEmpty(); |
| assert pendingNewMethodSignatureUpdates.isEmpty(); |
| assert newMethodSignatures.values().stream() |
| .allMatch( |
| value -> { |
| assert newMethodSignatures.getKeys(value).size() == 1 |
| || newMethodSignatures.hasExplicitRepresentativeKey(value); |
| return true; |
| }); |
| return new HorizontalClassMergerGraphLens( |
| appView, |
| mergedClasses, |
| methodExtraParameters, |
| newFieldSignatures, |
| methodMap.getForwardMap(), |
| newMethodSignatures); |
| } |
| |
| DexMethod getRenamedMethodSignature(DexMethod method) { |
| assert newMethodSignatures.containsKey(method); |
| return newMethodSignatures.get(method); |
| } |
| |
| void recordNewFieldSignature(DexField oldFieldSignature, DexField newFieldSignature) { |
| newFieldSignatures.put(oldFieldSignature, newFieldSignature); |
| } |
| |
| void recordNewFieldSignature( |
| Iterable<DexField> oldFieldSignatures, |
| DexField newFieldSignature, |
| DexField representative) { |
| assert Streams.stream(oldFieldSignatures) |
| .anyMatch(oldFieldSignature -> oldFieldSignature != newFieldSignature); |
| assert Streams.stream(oldFieldSignatures).noneMatch(newFieldSignatures::containsValue); |
| assert Iterables.contains(oldFieldSignatures, representative); |
| for (DexField oldFieldSignature : oldFieldSignatures) { |
| recordNewFieldSignature(oldFieldSignature, newFieldSignature); |
| } |
| newFieldSignatures.setRepresentative(newFieldSignature, representative); |
| } |
| |
| void fixupField(DexField oldFieldSignature, DexField newFieldSignature) { |
| fixupOriginalMemberSignatures( |
| oldFieldSignature, |
| newFieldSignature, |
| newFieldSignatures, |
| pendingNewFieldSignatureUpdates); |
| } |
| |
| void mapMethod(DexMethod oldMethodSignature, DexMethod newMethodSignature) { |
| methodMap.put(oldMethodSignature, newMethodSignature); |
| } |
| |
| void moveMethod(DexMethod from, DexMethod to) { |
| moveMethod(from, to, false); |
| } |
| |
| void moveMethod(DexMethod from, DexMethod to, boolean isRepresentative) { |
| mapMethod(from, to); |
| recordNewMethodSignature(from, to, isRepresentative); |
| } |
| |
| void moveMethods(Iterable<ProgramMethod> methods, DexMethod to) { |
| moveMethods(methods, to, null); |
| } |
| |
| void moveMethods(Iterable<ProgramMethod> methods, DexMethod to, ProgramMethod representative) { |
| for (ProgramMethod from : methods) { |
| boolean isRepresentative = representative != null && from == representative; |
| moveMethod(from.getReference(), to, isRepresentative); |
| } |
| } |
| |
| void recordNewMethodSignature(DexMethod oldMethodSignature, DexMethod newMethodSignature) { |
| recordNewMethodSignature(oldMethodSignature, newMethodSignature, false); |
| } |
| |
| void recordNewMethodSignature( |
| DexMethod oldMethodSignature, DexMethod newMethodSignature, boolean isRepresentative) { |
| newMethodSignatures.put(oldMethodSignature, newMethodSignature); |
| if (isRepresentative) { |
| newMethodSignatures.setRepresentative(newMethodSignature, oldMethodSignature); |
| } |
| } |
| |
| void fixupMethod(DexMethod oldMethodSignature, DexMethod newMethodSignature) { |
| fixupMethodMap(oldMethodSignature, newMethodSignature); |
| fixupOriginalMemberSignatures( |
| oldMethodSignature, |
| newMethodSignature, |
| newMethodSignatures, |
| pendingNewMethodSignatureUpdates); |
| } |
| |
| private void fixupMethodMap(DexMethod oldMethodSignature, DexMethod newMethodSignature) { |
| Set<DexMethod> originalMethodSignatures = methodMap.getKeys(oldMethodSignature); |
| if (originalMethodSignatures.isEmpty()) { |
| pendingMethodMapUpdates.put(oldMethodSignature, newMethodSignature); |
| } else { |
| for (DexMethod originalMethodSignature : originalMethodSignatures) { |
| pendingMethodMapUpdates.put(originalMethodSignature, newMethodSignature); |
| } |
| } |
| } |
| |
| private <D extends DexEncodedMember<D, R>, R extends DexMember<D, R>> |
| void fixupOriginalMemberSignatures( |
| R oldMemberSignature, |
| R newMemberSignature, |
| MutableBidirectionalManyToOneRepresentativeMap<R, R> newMemberSignatures, |
| MutableBidirectionalManyToOneRepresentativeMap<R, R> pendingNewMemberSignatureUpdates) { |
| Set<R> oldMemberSignatures = newMemberSignatures.getKeys(oldMemberSignature); |
| if (oldMemberSignatures.isEmpty()) { |
| pendingNewMemberSignatureUpdates.put(oldMemberSignature, newMemberSignature); |
| } else { |
| for (R originalMethodSignature : oldMemberSignatures) { |
| pendingNewMemberSignatureUpdates.put(originalMethodSignature, newMemberSignature); |
| } |
| R representative = newMemberSignatures.getRepresentativeKey(oldMemberSignature); |
| if (representative != null) { |
| pendingNewMemberSignatureUpdates.setRepresentative(newMemberSignature, representative); |
| } |
| } |
| } |
| |
| void commitPendingUpdates() { |
| // Commit pending method map updates. |
| methodMap.removeAll(pendingMethodMapUpdates.keySet()); |
| pendingMethodMapUpdates.forEachManyToOneMapping(methodMap::put); |
| pendingMethodMapUpdates.clear(); |
| |
| // Commit pending original field and method signatures updates. |
| commitPendingNewMemberSignatureUpdates(newFieldSignatures, pendingNewFieldSignatureUpdates); |
| commitPendingNewMemberSignatureUpdates(newMethodSignatures, pendingNewMethodSignatureUpdates); |
| } |
| |
| private <D extends DexEncodedMember<D, R>, R extends DexMember<D, R>> |
| void commitPendingNewMemberSignatureUpdates( |
| MutableBidirectionalManyToOneRepresentativeMap<R, R> newMemberSignatures, |
| MutableBidirectionalManyToOneRepresentativeMap<R, R> pendingNewMemberSignatureUpdates) { |
| newMemberSignatures.removeAll(pendingNewMemberSignatureUpdates.keySet()); |
| newMemberSignatures.putAll(pendingNewMemberSignatureUpdates); |
| pendingNewMemberSignatureUpdates.clear(); |
| } |
| |
| /** |
| * One way mapping from one constructor to another. This is used for synthesized constructors, |
| * where many constructors are merged into a single constructor. The synthesized constructor |
| * therefore does not have a unique reverse constructor. |
| */ |
| void mapMergedConstructor(DexMethod from, DexMethod to, List<ExtraParameter> extraParameters) { |
| mapMethod(from, to); |
| if (extraParameters.size() > 0) { |
| methodExtraParameters.put(from, extraParameters); |
| } |
| } |
| |
| void addExtraParameters( |
| DexMethod methodSignature, List<? extends ExtraParameter> extraParameters) { |
| Set<DexMethod> originalMethodSignatures = methodMap.getKeys(methodSignature); |
| if (originalMethodSignatures.isEmpty()) { |
| methodExtraParameters |
| .computeIfAbsent(methodSignature, ignore -> new ArrayList<>(extraParameters.size())) |
| .addAll(extraParameters); |
| } else { |
| for (DexMethod originalMethodSignature : originalMethodSignatures) { |
| methodExtraParameters |
| .computeIfAbsent( |
| originalMethodSignature, ignore -> new ArrayList<>(extraParameters.size())) |
| .addAll(extraParameters); |
| } |
| } |
| } |
| } |
| } |
