| /*** |
| * ASM: a very small and fast Java bytecode manipulation framework |
| * Copyright (c) 2000-2011 INRIA, France Telecom |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the copyright holders nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| package org.apache.tajo.org.objectweb.asm.optimizer; |
| |
| import org.apache.tajo.org.objectweb.asm.AnnotationVisitor; |
| import org.apache.tajo.org.objectweb.asm.Attribute; |
| import org.apache.tajo.org.objectweb.asm.FieldVisitor; |
| import org.apache.tajo.org.objectweb.asm.Label; |
| import org.apache.tajo.org.objectweb.asm.MethodVisitor; |
| import org.apache.tajo.org.objectweb.asm.Opcodes; |
| import org.apache.tajo.org.objectweb.asm.Type; |
| import org.apache.tajo.org.objectweb.asm.commons.Remapper; |
| import org.apache.tajo.org.objectweb.asm.commons.RemappingMethodAdapter; |
| |
| /** |
| * A {@link org.apache.tajo.org.objectweb.asm.MethodVisitor} that renames fields and methods, and removes debug |
| * info. |
| * |
| * @author Eugene Kuleshov |
| */ |
| public class MethodOptimizer extends RemappingMethodAdapter implements Opcodes { |
| |
| private final ClassOptimizer classOptimizer; |
| |
| public MethodOptimizer(ClassOptimizer classOptimizer, int access, |
| String desc, MethodVisitor mv, Remapper remapper) { |
| super(access, desc, mv, remapper); |
| this.classOptimizer = classOptimizer; |
| } |
| |
| // ------------------------------------------------------------------------ |
| // Overridden methods |
| // ------------------------------------------------------------------------ |
| |
| @Override |
| public AnnotationVisitor visitAnnotationDefault() { |
| // remove annotations |
| return null; |
| } |
| |
| @Override |
| public AnnotationVisitor visitAnnotation(String desc, boolean visible) { |
| // remove annotations |
| return null; |
| } |
| |
| @Override |
| public AnnotationVisitor visitParameterAnnotation(final int parameter, |
| final String desc, final boolean visible) { |
| // remove annotations |
| return null; |
| } |
| |
| @Override |
| public void visitLocalVariable(final String name, final String desc, |
| final String signature, final Label start, final Label end, |
| final int index) { |
| // remove debug info |
| } |
| |
| @Override |
| public void visitLineNumber(final int line, final Label start) { |
| // remove debug info |
| } |
| |
| @Override |
| public void visitFrame(int type, int local, Object[] local2, int stack, |
| Object[] stack2) { |
| // remove frame info |
| } |
| |
| @Override |
| public void visitAttribute(Attribute attr) { |
| // remove non standard attributes |
| } |
| |
| @Override |
| public void visitLdcInsn(Object cst) { |
| if (!(cst instanceof Type)) { |
| super.visitLdcInsn(cst); |
| return; |
| } |
| |
| // transform Foo.class to foo$(class) for 1.2 compatibility |
| String ldcName = ((Type) cst).getInternalName(); |
| String fieldName = "class$" + ldcName.replace('/', '$'); |
| |
| FieldVisitor fv = classOptimizer.syntheticFieldVisitor(ACC_STATIC |
| | ACC_SYNTHETIC, fieldName, "Ljava/lang/Class;"); |
| fv.visitEnd(); |
| |
| if (!classOptimizer.class$) { |
| MethodVisitor mv = classOptimizer.visitMethod(ACC_STATIC |
| | ACC_SYNTHETIC, "class$", |
| "(Ljava/lang/String;)Ljava/lang/Class;", null, null); |
| mv.visitCode(); |
| Label l0 = new Label(); |
| Label l1 = new Label(); |
| Label l2 = new Label(); |
| mv.visitTryCatchBlock(l0, l1, l2, |
| "java/lang/ClassNotFoundException"); |
| mv.visitLabel(l0); |
| mv.visitVarInsn(ALOAD, 0); |
| mv.visitMethodInsn(INVOKESTATIC, "java/lang/Class", "forName", |
| "(Ljava/lang/String;)Ljava/lang/Class;"); |
| mv.visitLabel(l1); |
| mv.visitInsn(ARETURN); |
| mv.visitLabel(l2); |
| mv.visitMethodInsn(INVOKEVIRTUAL, |
| "java/lang/ClassNotFoundException", "getMessage", |
| "()Ljava/lang/String;"); |
| mv.visitVarInsn(ASTORE, 1); |
| mv.visitTypeInsn(NEW, "java/lang/NoClassDefFoundError"); |
| mv.visitInsn(DUP); |
| mv.visitVarInsn(ALOAD, 1); |
| mv.visitMethodInsn(INVOKESPECIAL, "java/lang/NoClassDefFoundError", |
| "<init>", "(Ljava/lang/String;)V"); |
| mv.visitInsn(ATHROW); |
| mv.visitMaxs(3, 2); |
| mv.visitEnd(); |
| |
| classOptimizer.class$ = true; |
| } |
| |
| String clsName = classOptimizer.clsName; |
| mv.visitFieldInsn(GETSTATIC, clsName, fieldName, "Ljava/lang/Class;"); |
| Label elseLabel = new Label(); |
| mv.visitJumpInsn(IFNONNULL, elseLabel); |
| mv.visitLdcInsn(ldcName.replace('/', '.')); |
| mv.visitMethodInsn(INVOKESTATIC, clsName, "class$", |
| "(Ljava/lang/String;)Ljava/lang/Class;"); |
| mv.visitInsn(DUP); |
| mv.visitFieldInsn(PUTSTATIC, clsName, fieldName, "Ljava/lang/Class;"); |
| Label endLabel = new Label(); |
| mv.visitJumpInsn(GOTO, endLabel); |
| mv.visitLabel(elseLabel); |
| mv.visitFieldInsn(GETSTATIC, clsName, fieldName, "Ljava/lang/Class;"); |
| mv.visitLabel(endLabel); |
| } |
| } |