diff options
Diffstat (limited to 'third_party/java/proguard/proguard5.3.3/src/proguard/optimize/info/InstanceofClassMarker.java')
-rw-r--r-- | third_party/java/proguard/proguard5.3.3/src/proguard/optimize/info/InstanceofClassMarker.java | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/third_party/java/proguard/proguard5.3.3/src/proguard/optimize/info/InstanceofClassMarker.java b/third_party/java/proguard/proguard5.3.3/src/proguard/optimize/info/InstanceofClassMarker.java new file mode 100644 index 0000000000..26cc9665af --- /dev/null +++ b/third_party/java/proguard/proguard5.3.3/src/proguard/optimize/info/InstanceofClassMarker.java @@ -0,0 +1,93 @@ +/* + * ProGuard -- shrinking, optimization, obfuscation, and preverification + * of Java bytecode. + * + * Copyright (c) 2002-2017 Eric Lafortune @ GuardSquare + * + * 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.ClassConstant; +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.ClassVisitor; + +/** + * This InstructionVisitor marks all classes that are used in an 'instanceof' + * test by any of the instructions that it visits. + * + * @author Eric Lafortune + */ +public class InstanceofClassMarker +extends SimplifiedVisitor +implements InstructionVisitor, + ConstantVisitor, + ClassVisitor +{ + // 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) + { + if (constantInstruction.opcode == InstructionConstants.OP_INSTANCEOF) + { + clazz.constantPoolEntryAccept(constantInstruction.constantIndex, this); + } + } + + + // Implementations for ConstantVisitor. + + public void visitClassConstant(Clazz clazz, ClassConstant classConstant) + { + classConstant.referencedClassAccept(this); + } + + + // Implementations for ClassVisitor. + + public void visitLibraryClass(LibraryClass libraryClass) {} + + public void visitProgramClass(ProgramClass programClass) + { + setInstanceofed(programClass); + } + + + // Small utility methods. + + private static void setInstanceofed(Clazz clazz) + { + ClassOptimizationInfo info = ClassOptimizationInfo.getClassOptimizationInfo(clazz); + if (info != null) + { + info.setInstanceofed(); + } + } + + + public static boolean isInstanceofed(Clazz clazz) + { + ClassOptimizationInfo info = ClassOptimizationInfo.getClassOptimizationInfo(clazz); + return info == null || info.isInstanceofed(); + } +}
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