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Diffstat (limited to 'src/proguard/optimize/info/FieldOptimizationInfo.java')
-rw-r--r-- | src/proguard/optimize/info/FieldOptimizationInfo.java | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/src/proguard/optimize/info/FieldOptimizationInfo.java b/src/proguard/optimize/info/FieldOptimizationInfo.java deleted file mode 100644 index 730eead..0000000 --- a/src/proguard/optimize/info/FieldOptimizationInfo.java +++ /dev/null @@ -1,188 +0,0 @@ -/* - * ProGuard -- shrinking, optimization, obfuscation, and preverification - * of Java bytecode. - * - * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu) - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - * - * This program 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 for - * more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ -package proguard.optimize.info; - -import proguard.classfile.*; -import proguard.classfile.attribute.*; -import proguard.classfile.attribute.visitor.*; -import proguard.classfile.util.SimplifiedVisitor; -import proguard.evaluation.ConstantValueFactory; -import proguard.evaluation.value.*; - -/** - * This class stores some optimization information that can be attached to - * a field. - * - * @author Eric Lafortune - */ -public class FieldOptimizationInfo -extends SimplifiedVisitor -implements AttributeVisitor -{ - private static final ParticularValueFactory VALUE_FACTORY = new ParticularValueFactory(); - private static final ConstantValueFactory CONSTANT_VALUE_FACTORY = new ConstantValueFactory(VALUE_FACTORY); - private static final InitialValueFactory INITIAL_VALUE_FACTORY = new InitialValueFactory(VALUE_FACTORY); - - private boolean isWritten; - private boolean isRead; - private boolean canBeMadePrivate = true; - private ReferenceValue referencedClass; - private Value value; - - - public FieldOptimizationInfo(Clazz clazz, Field field) - { - int accessFlags = field.getAccessFlags(); - - isWritten = - isRead = (accessFlags & ClassConstants.ACC_VOLATILE) != 0; - - resetValue(clazz, field); - } - - - public FieldOptimizationInfo(FieldOptimizationInfo FieldOptimizationInfo) - { - this.isWritten = FieldOptimizationInfo.isWritten; - this.isRead = FieldOptimizationInfo.isRead; - this.canBeMadePrivate = FieldOptimizationInfo.canBeMadePrivate; - this.referencedClass = FieldOptimizationInfo.referencedClass; - this.value = FieldOptimizationInfo.value; - } - - - public void setWritten() - { - isWritten = true; - } - - - public boolean isWritten() - { - return isWritten; - } - - - public void setRead() - { - isRead = true; - } - - - public boolean isRead() - { - return isRead; - } - - - public void setCanNotBeMadePrivate() - { - canBeMadePrivate = false; - } - - - public boolean canBeMadePrivate() - { - return canBeMadePrivate; - } - - - public void generalizeReferencedClass(ReferenceValue referencedClass) - { - this.referencedClass = this.referencedClass != null ? - this.referencedClass.generalize(referencedClass) : - referencedClass; - } - - - public ReferenceValue getReferencedClass() - { - return referencedClass; - } - - - public void resetValue(Clazz clazz, Field field) - { - int accessFlags = field.getAccessFlags(); - - value = null; - - // See if we can initialize a static field with a constant value. - if ((accessFlags & ClassConstants.ACC_STATIC) != 0) - { - field.accept(clazz, new AllAttributeVisitor(this)); - } - - // Otherwise initialize a non-final field with the default value. - // Conservatively, even a final field needs to be initialized with the - // default value, because it may be accessed before it is set. - if (value == null && - (SideEffectInstructionChecker.OPTIMIZE_CONSERVATIVELY || - (accessFlags & ClassConstants.ACC_FINAL) == 0)) - { - value = INITIAL_VALUE_FACTORY.createValue(field.getDescriptor(clazz)); - } - } - - - public void generalizeValue(Value value) - { - this.value = this.value != null ? - this.value.generalize(value) : - value; - } - - - public Value getValue() - { - return value; - } - - - // Implementations for AttributeVisitor. - - public void visitAnyAttribute(Clazz clazz, Attribute attribute) {} - - - public void visitConstantValueAttribute(Clazz clazz, Field field, ConstantValueAttribute constantValueAttribute) - { - // Retrieve the initial static field value. - value = CONSTANT_VALUE_FACTORY.constantValue(clazz, constantValueAttribute.u2constantValueIndex); - } - - - // Small utility methods. - - public static void setFieldOptimizationInfo(Clazz clazz, Field field) - { - field.setVisitorInfo(new FieldOptimizationInfo(clazz, field)); - } - - - public static FieldOptimizationInfo getFieldOptimizationInfo(Field field) - { - Object visitorInfo = field.getVisitorInfo(); - - return visitorInfo instanceof FieldOptimizationInfo ? - (FieldOptimizationInfo)visitorInfo : - null; - } -} |