| /* |
| * 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.info; |
| |
| import proguard.classfile.*; |
| import proguard.classfile.attribute.CodeAttribute; |
| import proguard.classfile.constant.*; |
| import proguard.classfile.constant.visitor.ConstantVisitor; |
| import proguard.classfile.instruction.*; |
| import proguard.classfile.instruction.visitor.InstructionVisitor; |
| import proguard.classfile.util.SimplifiedVisitor; |
| import proguard.classfile.visitor.MemberVisitor; |
| |
| /** |
| * This InstructionVisitor counts the number of times methods are invoked from |
| * the instructions that are visited. |
| * |
| * @author Eric Lafortune |
| */ |
| public class MethodInvocationMarker |
| extends SimplifiedVisitor |
| implements InstructionVisitor, |
| ConstantVisitor, |
| MemberVisitor |
| { |
| // Implementations for InstructionVisitor. |
| |
| public void visitAnyInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, Instruction instruction) {} |
| |
| |
| public void visitConstantInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, ConstantInstruction constantInstruction) |
| { |
| clazz.constantPoolEntryAccept(constantInstruction.constantIndex, this); |
| } |
| |
| |
| // Implementations for ConstantVisitor. |
| |
| public void visitAnyConstant(Clazz clazz, Constant constant) {} |
| |
| |
| public void visitStringConstant(Clazz clazz, StringConstant stringConstant) |
| { |
| // Mark the referenced method, if any. |
| stringConstant.referencedMemberAccept(this); |
| } |
| |
| |
| public void visitAnyMethodrefConstant(Clazz clazz, RefConstant refConstant) |
| { |
| // Mark the referenced method. |
| refConstant.referencedMemberAccept(this); |
| } |
| |
| |
| // Implementations for MemberVisitor. |
| |
| public void visitAnyMember(Clazz Clazz, Member member) {} |
| |
| |
| public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod) |
| { |
| incrementInvocationCount(programMethod); |
| } |
| |
| |
| // Small utility methods. |
| |
| private static void incrementInvocationCount(Method method) |
| { |
| MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method); |
| if (info != null) |
| { |
| info.incrementInvocationCount(); |
| } |
| } |
| |
| |
| /** |
| * Returns the number of times the given method was invoked by the |
| * instructions that were visited. |
| */ |
| public static int getInvocationCount(Method method) |
| { |
| MethodOptimizationInfo info = MethodOptimizationInfo.getMethodOptimizationInfo(method); |
| return info != null ? info.getInvocationCount() : |
| Integer.MAX_VALUE; |
| } |
| } |