| /* |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * This file is available under and governed by the GNU General Public |
| * License version 2 only, as published by the Free Software Foundation. |
| * However, the following notice accompanied the original version of this |
| * file: |
| * |
| * 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 jdk.internal.org.objectweb.asm.commons; |
| |
| import jdk.internal.org.objectweb.asm.Handle; |
| import jdk.internal.org.objectweb.asm.Label; |
| import jdk.internal.org.objectweb.asm.MethodVisitor; |
| import jdk.internal.org.objectweb.asm.Opcodes; |
| |
| /** |
| * A {@link MethodVisitor} that can be used to approximate method size. |
| * |
| * @author Eugene Kuleshov |
| */ |
| public class CodeSizeEvaluator extends MethodVisitor implements Opcodes { |
| |
| private int minSize; |
| |
| private int maxSize; |
| |
| public CodeSizeEvaluator(final MethodVisitor mv) { |
| this(Opcodes.ASM5, mv); |
| } |
| |
| protected CodeSizeEvaluator(final int api, final MethodVisitor mv) { |
| super(api, mv); |
| } |
| |
| public int getMinSize() { |
| return this.minSize; |
| } |
| |
| public int getMaxSize() { |
| return this.maxSize; |
| } |
| |
| @Override |
| public void visitInsn(final int opcode) { |
| minSize += 1; |
| maxSize += 1; |
| if (mv != null) { |
| mv.visitInsn(opcode); |
| } |
| } |
| |
| @Override |
| public void visitIntInsn(final int opcode, final int operand) { |
| if (opcode == SIPUSH) { |
| minSize += 3; |
| maxSize += 3; |
| } else { |
| minSize += 2; |
| maxSize += 2; |
| } |
| if (mv != null) { |
| mv.visitIntInsn(opcode, operand); |
| } |
| } |
| |
| @Override |
| public void visitVarInsn(final int opcode, final int var) { |
| if (var < 4 && opcode != RET) { |
| minSize += 1; |
| maxSize += 1; |
| } else if (var >= 256) { |
| minSize += 4; |
| maxSize += 4; |
| } else { |
| minSize += 2; |
| maxSize += 2; |
| } |
| if (mv != null) { |
| mv.visitVarInsn(opcode, var); |
| } |
| } |
| |
| @Override |
| public void visitTypeInsn(final int opcode, final String type) { |
| minSize += 3; |
| maxSize += 3; |
| if (mv != null) { |
| mv.visitTypeInsn(opcode, type); |
| } |
| } |
| |
| @Override |
| public void visitFieldInsn(final int opcode, final String owner, |
| final String name, final String desc) { |
| minSize += 3; |
| maxSize += 3; |
| if (mv != null) { |
| mv.visitFieldInsn(opcode, owner, name, desc); |
| } |
| } |
| |
| @Deprecated |
| @Override |
| public void visitMethodInsn(final int opcode, final String owner, |
| final String name, final String desc) { |
| if (api >= Opcodes.ASM5) { |
| super.visitMethodInsn(opcode, owner, name, desc); |
| return; |
| } |
| doVisitMethodInsn(opcode, owner, name, desc, |
| opcode == Opcodes.INVOKEINTERFACE); |
| } |
| |
| @Override |
| public void visitMethodInsn(final int opcode, final String owner, |
| final String name, final String desc, final boolean itf) { |
| if (api < Opcodes.ASM5) { |
| super.visitMethodInsn(opcode, owner, name, desc, itf); |
| return; |
| } |
| doVisitMethodInsn(opcode, owner, name, desc, itf); |
| } |
| |
| private void doVisitMethodInsn(int opcode, final String owner, |
| final String name, final String desc, final boolean itf) { |
| if (opcode == INVOKEINTERFACE) { |
| minSize += 5; |
| maxSize += 5; |
| } else { |
| minSize += 3; |
| maxSize += 3; |
| } |
| if (mv != null) { |
| mv.visitMethodInsn(opcode, owner, name, desc, itf); |
| } |
| } |
| |
| @Override |
| public void visitInvokeDynamicInsn(String name, String desc, Handle bsm, |
| Object... bsmArgs) { |
| minSize += 5; |
| maxSize += 5; |
| if (mv != null) { |
| mv.visitInvokeDynamicInsn(name, desc, bsm, bsmArgs); |
| } |
| } |
| |
| @Override |
| public void visitJumpInsn(final int opcode, final Label label) { |
| minSize += 3; |
| if (opcode == GOTO || opcode == JSR) { |
| maxSize += 5; |
| } else { |
| maxSize += 8; |
| } |
| if (mv != null) { |
| mv.visitJumpInsn(opcode, label); |
| } |
| } |
| |
| @Override |
| public void visitLdcInsn(final Object cst) { |
| if (cst instanceof Long || cst instanceof Double) { |
| minSize += 3; |
| maxSize += 3; |
| } else { |
| minSize += 2; |
| maxSize += 3; |
| } |
| if (mv != null) { |
| mv.visitLdcInsn(cst); |
| } |
| } |
| |
| @Override |
| public void visitIincInsn(final int var, final int increment) { |
| if (var > 255 || increment > 127 || increment < -128) { |
| minSize += 6; |
| maxSize += 6; |
| } else { |
| minSize += 3; |
| maxSize += 3; |
| } |
| if (mv != null) { |
| mv.visitIincInsn(var, increment); |
| } |
| } |
| |
| @Override |
| public void visitTableSwitchInsn(final int min, final int max, |
| final Label dflt, final Label... labels) { |
| minSize += 13 + labels.length * 4; |
| maxSize += 16 + labels.length * 4; |
| if (mv != null) { |
| mv.visitTableSwitchInsn(min, max, dflt, labels); |
| } |
| } |
| |
| @Override |
| public void visitLookupSwitchInsn(final Label dflt, final int[] keys, |
| final Label[] labels) { |
| minSize += 9 + keys.length * 8; |
| maxSize += 12 + keys.length * 8; |
| if (mv != null) { |
| mv.visitLookupSwitchInsn(dflt, keys, labels); |
| } |
| } |
| |
| @Override |
| public void visitMultiANewArrayInsn(final String desc, final int dims) { |
| minSize += 4; |
| maxSize += 4; |
| if (mv != null) { |
| mv.visitMultiANewArrayInsn(desc, dims); |
| } |
| } |
| } |