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Diffstat (limited to 'src/proguard/optimize/evaluation/LoadingInvocationUnit.java')
| -rw-r--r-- | src/proguard/optimize/evaluation/LoadingInvocationUnit.java | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/src/proguard/optimize/evaluation/LoadingInvocationUnit.java b/src/proguard/optimize/evaluation/LoadingInvocationUnit.java new file mode 100644 index 0000000..8379c57 --- /dev/null +++ b/src/proguard/optimize/evaluation/LoadingInvocationUnit.java @@ -0,0 +1,203 @@ +/* + * ProGuard -- shrinking, optimization, obfuscation, and preverification + * of Java bytecode. + * + * Copyright (c) 2002-2009 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.evaluation; + +import proguard.classfile.*; +import proguard.classfile.constant.RefConstant; +import proguard.evaluation.BasicInvocationUnit; +import proguard.evaluation.value.*; + +/** + * This InvocationUbit loads parameter values and return values that were + * previously stored with the methods that are invoked. + * + * @see StoringInvocationUnit + * @author Eric Lafortune + */ +public class LoadingInvocationUnit +extends BasicInvocationUnit +{ + private boolean loadFieldValues; + private boolean loadMethodParameterValues; + private boolean loadMethodReturnValues; + + + /** + * Creates a new LoadingInvocationUnit with the given value factory. + */ + public LoadingInvocationUnit(ValueFactory valueFactory) + { + this(valueFactory, false, false, false); + } + + + /** + * Creates a new LoadingInvocationUnit with the given value factory, for + * loading the specified values. + */ + public LoadingInvocationUnit(ValueFactory valueFactory, + boolean loadFieldValues, + boolean loadMethodParameterValues, + boolean loadMethodReturnValues) + { + super(valueFactory); + + this.loadFieldValues = loadFieldValues; + this.loadMethodParameterValues = loadMethodParameterValues; + this.loadMethodReturnValues = loadMethodReturnValues; + } + + + // Implementations for BasicInvocationUnit. + + protected Value getFieldClassValue(Clazz clazz, + RefConstant refConstant, + String type) + { + if (loadFieldValues) + { + // Do we know this field? + Member referencedMember = refConstant.referencedMember; + if (referencedMember != null) + { + // Retrieve the stored field class value. + ReferenceValue value = StoringInvocationUnit.getFieldClassValue((Field)referencedMember); + if (value != null && + value.isParticular()) + { + return value; +// // Make sure the value is refreshed. +// return refresh(value); + } + } + } + + return super.getFieldClassValue(clazz, refConstant, type); + } + + + protected Value getFieldValue(Clazz clazz, + RefConstant refConstant, + String type) + { + if (loadFieldValues) + { + // Do we know this field? + Member referencedMember = refConstant.referencedMember; + if (referencedMember != null) + { + // Retrieve the stored field value. + Value value = StoringInvocationUnit.getFieldValue((Field)referencedMember); + if (value != null && + value.isParticular()) + { + return value; +// // Make sure the value is refreshed. +// return refresh(value); + } + } + } + + return super.getFieldValue(clazz, refConstant, type); + } + + + protected Value getMethodParameterValue(Clazz clazz, + Method method, + int parameterIndex, + String type, + Clazz referencedClass) + { + if (loadMethodParameterValues) + { + // Retrieve the stored method parameter value. + Value value = StoringInvocationUnit.getMethodParameterValue(method, parameterIndex); + if (value != null && + value.isParticular()) + { + return value; +// // Make sure the value is refreshed. +// return refresh(value); + } + } + + return super.getMethodParameterValue(clazz, + method, + parameterIndex, + type, + referencedClass); + } + + + protected Value getMethodReturnValue(Clazz clazz, + RefConstant refConstant, + String type) + { + if (loadMethodReturnValues) + { + // Do we know this method? + Member referencedMember = refConstant.referencedMember; + if (referencedMember != null) + { + // Retrieve the stored method return value. + Value value = StoringInvocationUnit.getMethodReturnValue((Method)referencedMember); + if (value != null && + value.isParticular()) + { + return value; +// // Make sure the value is refreshed. +// return refresh(value); + } + } + } + + return super.getMethodReturnValue(clazz, + refConstant, + type); + } +// +// +// // Small utility methods. +// +// private Value refresh(Value value) +// { +// if (value.isParticular()) +// { +// return value; +// } +// +// switch (value.computationalType()) +// { +// case Value.TYPE_INTEGER: return valueFactory.createIntegerValue(); +// case Value.TYPE_LONG: return valueFactory.createLongValue(); +// case Value.TYPE_FLOAT: return valueFactory.createFloatValue(); +// case Value.TYPE_DOUBLE: return valueFactory.createDoubleValue(); +// default: +// { +// ReferenceValue referenceValue = value.referenceValue(); +// +// return valueFactory.createReferenceValue(referenceValue.getType(), +// referenceValue.getReferencedClass(), +// referenceValue.isNull() != Value.NEVER); +// } +// } +// } +} |