| /*** |
| * ASM: a very small and fast Java bytecode manipulation framework |
| * Copyright (c) 2000-2007 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.eclipse.persistence.internal.libraries.asm.util; |
| |
| import org.eclipse.persistence.internal.libraries.asm.AnnotationVisitor; |
| import org.eclipse.persistence.internal.libraries.asm.Label; |
| import org.eclipse.persistence.internal.libraries.asm.MethodVisitor; |
| import org.eclipse.persistence.internal.libraries.asm.Opcodes; |
| |
| import java.util.HashMap; |
| |
| /** |
| * A {@link MethodVisitor} that prints the ASM code that generates the methods |
| * it visits. |
| * |
| * @author Eric Bruneton |
| * @author Eugene Kuleshov |
| */ |
| public class ASMifierMethodVisitor extends ASMifierAbstractVisitor implements |
| MethodVisitor |
| { |
| |
| /** |
| * Constructs a new {@link ASMifierMethodVisitor} object. |
| */ |
| public ASMifierMethodVisitor() { |
| super("mv"); |
| this.labelNames = new HashMap(); |
| } |
| |
| public AnnotationVisitor visitAnnotationDefault() { |
| buf.setLength(0); |
| buf.append("{\n").append("av0 = mv.visitAnnotationDefault();\n"); |
| text.add(buf.toString()); |
| ASMifierAnnotationVisitor av = new ASMifierAnnotationVisitor(0); |
| text.add(av.getText()); |
| text.add("}\n"); |
| return av; |
| } |
| |
| public AnnotationVisitor visitParameterAnnotation( |
| final int parameter, |
| final String desc, |
| final boolean visible) |
| { |
| buf.setLength(0); |
| buf.append("{\n") |
| .append("av0 = mv.visitParameterAnnotation(") |
| .append(parameter) |
| .append(", "); |
| appendConstant(desc); |
| buf.append(", ").append(visible).append(");\n"); |
| text.add(buf.toString()); |
| ASMifierAnnotationVisitor av = new ASMifierAnnotationVisitor(0); |
| text.add(av.getText()); |
| text.add("}\n"); |
| return av; |
| } |
| |
| public void visitCode() { |
| text.add("mv.visitCode();\n"); |
| } |
| |
| public void visitFrame( |
| final int type, |
| final int nLocal, |
| final Object[] local, |
| final int nStack, |
| final Object[] stack) |
| { |
| buf.setLength(0); |
| switch (type) { |
| case Opcodes.F_NEW: |
| case Opcodes.F_FULL: |
| declareFrameTypes(nLocal, local); |
| declareFrameTypes(nStack, stack); |
| if (type == Opcodes.F_NEW) { |
| buf.append("mv.visitFrame(Opcodes.F_NEW, "); |
| } else { |
| buf.append("mv.visitFrame(Opcodes.F_FULL, "); |
| } |
| buf.append(nLocal).append(", new Object[] {"); |
| appendFrameTypes(nLocal, local); |
| buf.append("}, ").append(nStack).append(", new Object[] {"); |
| appendFrameTypes(nStack, stack); |
| buf.append('}'); |
| break; |
| case Opcodes.F_APPEND: |
| declareFrameTypes(nLocal, local); |
| buf.append("mv.visitFrame(Opcodes.F_APPEND,") |
| .append(nLocal) |
| .append(", new Object[] {"); |
| appendFrameTypes(nLocal, local); |
| buf.append("}, 0, null"); |
| break; |
| case Opcodes.F_CHOP: |
| buf.append("mv.visitFrame(Opcodes.F_CHOP,") |
| .append(nLocal) |
| .append(", null, 0, null"); |
| break; |
| case Opcodes.F_SAME: |
| buf.append("mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null"); |
| break; |
| case Opcodes.F_SAME1: |
| declareFrameTypes(1, stack); |
| buf.append("mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] {"); |
| appendFrameTypes(1, stack); |
| buf.append('}'); |
| break; |
| } |
| buf.append(");\n"); |
| text.add(buf.toString()); |
| } |
| |
| public void visitInsn(final int opcode) { |
| buf.setLength(0); |
| buf.append("mv.visitInsn(").append(OPCODES[opcode]).append(");\n"); |
| text.add(buf.toString()); |
| } |
| |
| public void visitIntInsn(final int opcode, final int operand) { |
| buf.setLength(0); |
| buf.append("mv.visitIntInsn(") |
| .append(OPCODES[opcode]) |
| .append(", ") |
| .append(opcode == Opcodes.NEWARRAY |
| ? TYPES[operand] |
| : Integer.toString(operand)) |
| .append(");\n"); |
| text.add(buf.toString()); |
| } |
| |
| public void visitVarInsn(final int opcode, final int var) { |
| buf.setLength(0); |
| buf.append("mv.visitVarInsn(") |
| .append(OPCODES[opcode]) |
| .append(", ") |
| .append(var) |
| .append(");\n"); |
| text.add(buf.toString()); |
| } |
| |
| public void visitTypeInsn(final int opcode, final String type) { |
| buf.setLength(0); |
| buf.append("mv.visitTypeInsn(").append(OPCODES[opcode]).append(", "); |
| appendConstant(type); |
| buf.append(");\n"); |
| text.add(buf.toString()); |
| } |
| |
| public void visitFieldInsn( |
| final int opcode, |
| final String owner, |
| final String name, |
| final String desc) |
| { |
| buf.setLength(0); |
| buf.append("mv.visitFieldInsn(").append(OPCODES[opcode]).append(", "); |
| appendConstant(owner); |
| buf.append(", "); |
| appendConstant(name); |
| buf.append(", "); |
| appendConstant(desc); |
| buf.append(");\n"); |
| text.add(buf.toString()); |
| } |
| |
| public void visitMethodInsn( |
| final int opcode, |
| final String owner, |
| final String name, |
| final String desc) |
| { |
| buf.setLength(0); |
| buf.append("mv.visitMethodInsn(").append(OPCODES[opcode]).append(", "); |
| appendConstant(owner); |
| buf.append(", "); |
| appendConstant(name); |
| buf.append(", "); |
| appendConstant(desc); |
| buf.append(");\n"); |
| text.add(buf.toString()); |
| } |
| |
| public void visitJumpInsn(final int opcode, final Label label) { |
| buf.setLength(0); |
| declareLabel(label); |
| buf.append("mv.visitJumpInsn(").append(OPCODES[opcode]).append(", "); |
| appendLabel(label); |
| buf.append(");\n"); |
| text.add(buf.toString()); |
| } |
| |
| public void visitLabel(final Label label) { |
| buf.setLength(0); |
| declareLabel(label); |
| buf.append("mv.visitLabel("); |
| appendLabel(label); |
| buf.append(");\n"); |
| text.add(buf.toString()); |
| } |
| |
| public void visitLdcInsn(final Object cst) { |
| buf.setLength(0); |
| buf.append("mv.visitLdcInsn("); |
| appendConstant(cst); |
| buf.append(");\n"); |
| text.add(buf.toString()); |
| } |
| |
| public void visitIincInsn(final int var, final int increment) { |
| buf.setLength(0); |
| buf.append("mv.visitIincInsn(") |
| .append(var) |
| .append(", ") |
| .append(increment) |
| .append(");\n"); |
| text.add(buf.toString()); |
| } |
| |
| public void visitTableSwitchInsn( |
| final int min, |
| final int max, |
| final Label dflt, |
| final Label[] labels) |
| { |
| buf.setLength(0); |
| for (int i = 0; i < labels.length; ++i) { |
| declareLabel(labels[i]); |
| } |
| declareLabel(dflt); |
| |
| buf.append("mv.visitTableSwitchInsn(") |
| .append(min) |
| .append(", ") |
| .append(max) |
| .append(", "); |
| appendLabel(dflt); |
| buf.append(", new Label[] {"); |
| for (int i = 0; i < labels.length; ++i) { |
| buf.append(i == 0 ? " " : ", "); |
| appendLabel(labels[i]); |
| } |
| buf.append(" });\n"); |
| text.add(buf.toString()); |
| } |
| |
| public void visitLookupSwitchInsn( |
| final Label dflt, |
| final int[] keys, |
| final Label[] labels) |
| { |
| buf.setLength(0); |
| for (int i = 0; i < labels.length; ++i) { |
| declareLabel(labels[i]); |
| } |
| declareLabel(dflt); |
| |
| buf.append("mv.visitLookupSwitchInsn("); |
| appendLabel(dflt); |
| buf.append(", new int[] {"); |
| for (int i = 0; i < keys.length; ++i) { |
| buf.append(i == 0 ? " " : ", ").append(keys[i]); |
| } |
| buf.append(" }, new Label[] {"); |
| for (int i = 0; i < labels.length; ++i) { |
| buf.append(i == 0 ? " " : ", "); |
| appendLabel(labels[i]); |
| } |
| buf.append(" });\n"); |
| text.add(buf.toString()); |
| } |
| |
| public void visitMultiANewArrayInsn(final String desc, final int dims) { |
| buf.setLength(0); |
| buf.append("mv.visitMultiANewArrayInsn("); |
| appendConstant(desc); |
| buf.append(", ").append(dims).append(");\n"); |
| text.add(buf.toString()); |
| } |
| |
| public void visitTryCatchBlock( |
| final Label start, |
| final Label end, |
| final Label handler, |
| final String type) |
| { |
| buf.setLength(0); |
| declareLabel(start); |
| declareLabel(end); |
| declareLabel(handler); |
| buf.append("mv.visitTryCatchBlock("); |
| appendLabel(start); |
| buf.append(", "); |
| appendLabel(end); |
| buf.append(", "); |
| appendLabel(handler); |
| buf.append(", "); |
| appendConstant(type); |
| buf.append(");\n"); |
| text.add(buf.toString()); |
| } |
| |
| public void visitLocalVariable( |
| final String name, |
| final String desc, |
| final String signature, |
| final Label start, |
| final Label end, |
| final int index) |
| { |
| buf.setLength(0); |
| buf.append("mv.visitLocalVariable("); |
| appendConstant(name); |
| buf.append(", "); |
| appendConstant(desc); |
| buf.append(", "); |
| appendConstant(signature); |
| buf.append(", "); |
| appendLabel(start); |
| buf.append(", "); |
| appendLabel(end); |
| buf.append(", ").append(index).append(");\n"); |
| text.add(buf.toString()); |
| } |
| |
| public void visitLineNumber(final int line, final Label start) { |
| buf.setLength(0); |
| buf.append("mv.visitLineNumber(").append(line).append(", "); |
| appendLabel(start); |
| buf.append(");\n"); |
| text.add(buf.toString()); |
| } |
| |
| public void visitMaxs(final int maxStack, final int maxLocals) { |
| buf.setLength(0); |
| buf.append("mv.visitMaxs(") |
| .append(maxStack) |
| .append(", ") |
| .append(maxLocals) |
| .append(");\n"); |
| text.add(buf.toString()); |
| } |
| |
| private void declareFrameTypes(final int n, final Object[] o) { |
| for (int i = 0; i < n; ++i) { |
| if (o[i] instanceof Label) { |
| declareLabel((Label) o[i]); |
| } |
| } |
| } |
| |
| private void appendFrameTypes(final int n, final Object[] o) { |
| for (int i = 0; i < n; ++i) { |
| if (i > 0) { |
| buf.append(", "); |
| } |
| if (o[i] instanceof String) { |
| appendConstant(o[i]); |
| } else if (o[i] instanceof Integer) { |
| switch (((Integer) o[i]).intValue()) { |
| case 0: |
| buf.append("Opcodes.TOP"); |
| break; |
| case 1: |
| buf.append("Opcodes.INTEGER"); |
| break; |
| case 2: |
| buf.append("Opcodes.FLOAT"); |
| break; |
| case 3: |
| buf.append("Opcodes.DOUBLE"); |
| break; |
| case 4: |
| buf.append("Opcodes.LONG"); |
| break; |
| case 5: |
| buf.append("Opcodes.NULL"); |
| break; |
| case 6: |
| buf.append("Opcodes.UNINITIALIZED_THIS"); |
| break; |
| } |
| } else { |
| appendLabel((Label) o[i]); |
| } |
| } |
| } |
| |
| /** |
| * Appends a declaration of the given label to {@link #buf buf}. This |
| * declaration is of the form "Label lXXX = new Label();". Does nothing if |
| * the given label has already been declared. |
| * |
| * @param l a label. |
| */ |
| private void declareLabel(final Label l) { |
| String name = (String) labelNames.get(l); |
| if (name == null) { |
| name = "l" + labelNames.size(); |
| labelNames.put(l, name); |
| buf.append("Label ").append(name).append(" = new Label();\n"); |
| } |
| } |
| |
| /** |
| * Appends the name of the given label to {@link #buf buf}. The given label |
| * <i>must</i> already have a name. One way to ensure this is to always |
| * call {@link #declareLabel declared} before calling this method. |
| * |
| * @param l a label. |
| */ |
| private void appendLabel(final Label l) { |
| buf.append((String) labelNames.get(l)); |
| } |
| } |