proguard.optimize.info.SynchronizedBlockMethodMarker Maven / Gradle / Ivy
/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2018 GuardSquare NV
*
* 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.CodeAttribute;
import proguard.classfile.instruction.*;
import proguard.classfile.instruction.visitor.InstructionVisitor;
import proguard.classfile.util.SimplifiedVisitor;
/**
* This InstructionVisitor marks the existence of synchronized blocks
* of the methods whose instructions it visits.
*
* @author Thomas Neidhart
*/
public class SynchronizedBlockMethodMarker
extends SimplifiedVisitor
implements InstructionVisitor
{
// Implementations for InstructionVisitor.
public void visitAnyInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, Instruction instruction) {}
public void visitSimpleInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, SimpleInstruction simpleInstruction)
{
if (simpleInstruction.opcode == InstructionConstants.OP_MONITORENTER ||
simpleInstruction.opcode == InstructionConstants.OP_MONITOREXIT)
{
setHasSynchronizedBlock(method);
}
}
// Small utility methods.
private static void setHasSynchronizedBlock(Method method)
{
ProgramMethodOptimizationInfo.getProgramMethodOptimizationInfo(method).setHasSynchronizedBlock();
}
/**
* Returns whether the given method accesses private class members.
*/
public static boolean hasSynchronizedBlock(Method method)
{
return MethodOptimizationInfo.getMethodOptimizationInfo(method).hasSynchronizedBlock();
}
}
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