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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.jack.shrob.shrink;
import com.android.jack.Jack;
import com.android.jack.JackAbortException;
import com.android.jack.analysis.tracer.AbstractTracerBrush;
import com.android.jack.analysis.tracer.Tracer;
import com.android.jack.ir.ast.JClass;
import com.android.jack.ir.ast.JDefinedClass;
import com.android.jack.ir.ast.JDefinedClassOrInterface;
import com.android.jack.ir.ast.JDefinedInterface;
import com.android.jack.ir.ast.JField;
import com.android.jack.ir.ast.JInterface;
import com.android.jack.ir.ast.JMethod;
import com.android.jack.ir.ast.JNode;
import com.android.jack.ir.ast.JPhantomClass;
import com.android.jack.ir.ast.JPhantomClassOrInterface;
import com.android.jack.ir.ast.JPhantomInterface;
import com.android.jack.ir.formatter.UserFriendlyFormatter;
import com.android.jack.reporting.Reporter.Severity;
import com.android.jack.shrob.seed.SeedMarker;
import com.android.jack.shrob.spec.KeepModifier;
import com.android.sched.item.Description;
import com.android.sched.schedulable.Constraint;
import com.android.sched.schedulable.Transform;
import com.android.sched.util.config.HasKeyId;
import com.android.sched.util.config.ThreadConfig;
import com.android.sched.util.config.id.BooleanPropertyId;
import javax.annotation.Nonnull;
/**
* A {@link Tracer} configuration that marks all classes and members that will be kept when
* shrinking.
*/
@Description("Marks all classes and members that will be kept when shrinking.")
@Transform(add = KeepMarker.class)
@Constraint(need = SeedMarker.class)
@HasKeyId
public class KeeperBrush extends AbstractTracerBrush<KeepMarker> {
private static final class UnknownReferencedTypeException extends Exception {
private static final long serialVersionUID = 1L;
@Nonnull
private final JPhantomClassOrInterface phantomClOrI;
private UnknownReferencedTypeException(@Nonnull JPhantomClassOrInterface phantomClOrI) {
this.phantomClOrI = phantomClOrI;
}
@Override
@Nonnull
public String getMessage() {
return "Unknown referenced type '"
+ UserFriendlyFormatter.getFormatter().getName(phantomClOrI)
+ "'. Add type into your classpath.";
}
}
@Nonnull
public static final BooleanPropertyId KEEP_ENCLOSING_METHOD = BooleanPropertyId.create(
"jack.shrink.keep.enclosing.method",
"Keep the enclosing method of anonymous classes").addDefaultValue(Boolean.FALSE);
public KeeperBrush() {
super(ThreadConfig.get(KeeperBrush.KEEP_ENCLOSING_METHOD).booleanValue(), KeepMarker.class,
SeedMarker.class);
}
@Override
protected boolean mustTraceOverridingMethod(@Nonnull JMethod method) {
if (method.getEnclosingType().isExternal()) {
return true;
} else {
return super.mustTraceOverridingMethod(method);
}
}
@Nonnull
@Override
protected KeepMarker createMarkerFor(@Nonnull JNode node) {
return new KeepMarker();
}
@Override
protected boolean isMarked(@Nonnull JNode node) {
if (node instanceof JDefinedClassOrInterface
&& ((JDefinedClassOrInterface) node).isExternal()) {
return true;
} else if (node instanceof JMethod
&& ((JMethod) node).getEnclosingType().isExternal()) {
return true;
} else {
return super.isMarked(node);
}
}
@Override
public void setMustTraceOverridingMethods(@Nonnull JMethod method) {
if (!method.getEnclosingType().isExternal()) {
super.setMustTraceOverridingMethods(method);
}
}
@Override
protected boolean markIfNecessary(@Nonnull JNode node) {
if (node instanceof JDefinedClassOrInterface
&& ((JDefinedClassOrInterface) node).isExternal()) {
return false;
} else if (node.getParent(JDefinedClassOrInterface.class).isExternal()) {
return false;
} else {
return super.markIfNecessary(node);
}
}
@Override
public boolean startTraceSeed(@Nonnull JDefinedClassOrInterface type) {
SeedMarker marker = type.getMarker(SeedMarker.class);
return marker != null && marker.getModifier() != KeepModifier.ALLOW_SHRINKING;
}
@Override
public boolean startTraceSeed(@Nonnull JMethod method) {
SeedMarker marker = method.getMarker(SeedMarker.class);
return marker != null && marker.getModifier() != KeepModifier.ALLOW_SHRINKING;
}
@Override
public boolean startTraceSeed(@Nonnull JField field) {
SeedMarker marker = field.getMarker(SeedMarker.class);
return marker != null && marker.getModifier() != KeepModifier.ALLOW_SHRINKING;
}
@Override
public boolean startTrace(@Nonnull JDefinedClassOrInterface type) {
boolean traceType = markIfNecessary(type);
if (traceType) {
try {
if (type instanceof JDefinedClass) {
verifyHierarchy((JDefinedClass) type);
} else {
assert type instanceof JDefinedInterface;
verifyImplementedInterfaces(type);
}
} catch (UnknownReferencedTypeException e) {
ShrinkingException reportable = new ShrinkingException(e);
Jack.getSession().getReporter().report(Severity.FATAL, reportable);
throw new JackAbortException(reportable);
}
}
return traceType;
}
private void verifyHierarchy(@Nonnull JDefinedClass t) throws UnknownReferencedTypeException {
JClass superClass = t.getSuperClass();
if (superClass instanceof JPhantomClass) {
throw new UnknownReferencedTypeException((JPhantomClass) superClass);
} else if (superClass != null) {
verifyHierarchy((JDefinedClass) superClass);
}
verifyImplementedInterfaces(t);
}
private void verifyImplementedInterfaces(@Nonnull JDefinedClassOrInterface t)
throws UnknownReferencedTypeException {
for (JInterface jInterface : t.getImplements()) {
if (jInterface instanceof JPhantomInterface) {
throw new UnknownReferencedTypeException((JPhantomInterface) jInterface);
} else {
assert jInterface instanceof JDefinedInterface;
verifyImplementedInterfaces((JDefinedInterface) jInterface);
}
}
}
}
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