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|
/***
* ASM: a very small and fast Java bytecode manipulation framework
* Copyright (c) 2000-2005 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.objectweb.asm.commons;
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Label;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.util.ASMifierAbstractVisitor;
import org.objectweb.asm.util.ASMifierAnnotationVisitor;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* A {@link MethodVisitor} that prints the ASM code that generates the methods
* it visits.
*
* @author Eric Bruneton
* @author Eugene Kuleshov
*/
public class GASMifierMethodVisitor extends ASMifierAbstractVisitor implements
MethodVisitor,
Opcodes
{
int access;
Type[] argumentTypes;
int firstLocal;
Map locals;
List localTypes;
int lastOpcode = -1;
HashMap labelNames;
public GASMifierMethodVisitor(int access, String desc) {
super("mg");
this.access = access;
this.labelNames = new HashMap();
this.argumentTypes = Type.getArgumentTypes(desc);
int nextLocal = ((Opcodes.ACC_STATIC & access) != 0) ? 0 : 1;
for (int i = 0; i < argumentTypes.length; i++) {
nextLocal += argumentTypes[i].getSize();
}
this.firstLocal = nextLocal;
this.locals = new HashMap();
this.localTypes = new ArrayList();
}
public AnnotationVisitor visitAnnotationDefault() {
buf.setLength(0);
buf.append("{\n").append("av0 = mg.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 = mg.visitParameterAnnotation(")
.append(parameter)
.append(", \"");
buf.append(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("mg.visitCode();\n"); */
}
public void visitInsn(final int opcode) {
buf.setLength(0);
switch (opcode) {
case IRETURN:
case LRETURN:
case FRETURN:
case DRETURN:
case ARETURN:
case RETURN:
buf.append("mg.returnValue();\n");
break;
case NOP:
break;
case ACONST_NULL:
buf.append("mg.push((String)null);\n");
break;
case ICONST_M1:
case ICONST_0:
case ICONST_1:
case ICONST_2:
case ICONST_3:
case ICONST_4:
case ICONST_5:
buf.append("mg.push(").append(opcode - ICONST_0).append(");\n");
break;
case LCONST_0:
case LCONST_1:
buf.append("mg.push(")
.append(opcode - LCONST_0)
.append("L);\n");
break;
case FCONST_0:
case FCONST_1:
case FCONST_2:
buf.append("mg.push(")
.append(opcode - FCONST_0)
.append("f);\n");
break;
case DCONST_0:
case DCONST_1:
buf.append("mg.push(")
.append(opcode - DCONST_0)
.append("d);\n");
break;
case POP:
buf.append("mg.pop();\n");
break;
case POP2:
buf.append("mg.pop2();\n");
break;
case DUP:
buf.append("mg.dup();\n");
break;
case DUP_X1:
buf.append("mg.dupX1();\n");
break;
case DUP_X2:
buf.append("mg.dupX2();\n");
break;
case DUP2:
buf.append("mg.dup2();\n");
break;
case DUP2_X1:
buf.append("mg.dup2X1();\n");
break;
case DUP2_X2:
buf.append("mg.dup2X2();\n");
break;
case SWAP:
buf.append("mg.swap();\n");
break;
case MONITORENTER:
buf.append("mg.monitorEnter();\n");
break;
case MONITOREXIT:
buf.append("mg.monitorExit();\n");
break;
case ARRAYLENGTH:
buf.append("mg.arrayLength();\n");
break;
case IALOAD:
buf.append("mg.arrayLoad(Type.INT_TYPE);\n");
break;
case LALOAD:
buf.append("mg.arrayLoad(Type.LONG_TYPE);\n");
break;
case FALOAD:
buf.append("mg.arrayLoad(Type.FLOAT_TYPE);\n");
break;
case DALOAD:
buf.append("mg.arrayLoad(Type.DOUBLE_TYPE);\n");
break;
case AALOAD:
buf.append("mg.arrayLoad(" + getType("java/lang/Object")
+ ");\n");
break;
case BALOAD:
buf.append("mg.arrayLoad(Type.BYTE_TYPE);\n");
break;
case CALOAD:
buf.append("mg.arrayLoad(Type.CHAR_TYPE);\n");
break;
case SALOAD:
buf.append("mg.arrayLoad(Type.SHORT_TYPE);\n");
break;
case IASTORE:
buf.append("mg.arrayStore(Type.INT_TYPE);\n");
break;
case LASTORE:
buf.append("mg.arrayStore(Type.LONG_TYPE);\n");
break;
case FASTORE:
buf.append("mg.arrayStore(Type.FLOAT_TYPE);\n");
break;
case DASTORE:
buf.append("mg.arrayStore(Type.DOUBLE_TYPE);\n");
break;
case AASTORE:
buf.append("mg.arrayStore(" + getType("java/lang/Object")
+ ");\n");
break;
case BASTORE:
buf.append("mg.arrayStore(Type.BYTE_TYPE);\n");
break;
case CASTORE:
buf.append("mg.arrayStore(Type.CHAR_TYPE);\n");
break;
case SASTORE:
buf.append("mg.arrayStore(Type.SHORT_TYPE);\n");
break;
case IADD:
buf.append("mg.math(GeneratorAdapter.ADD, Type.INT_TYPE);\n");
break;
case LADD:
buf.append("mg.math(GeneratorAdapter.ADD, Type.LONG_TYPE);\n");
break;
case FADD:
buf.append("mg.math(GeneratorAdapter.ADD, Type.FLOAT_TYPE);\n");
break;
case DADD:
buf.append("mg.math(GeneratorAdapter.ADD, Type.DOUBLE_TYPE);\n");
break;
case ISUB:
buf.append("mg.math(GeneratorAdapter.SUB, Type.INT_TYPE);\n");
break;
case LSUB:
buf.append("mg.math(GeneratorAdapter.SUB, Type.LONG_TYPE);\n");
break;
case FSUB:
buf.append("mg.math(GeneratorAdapter.SUB, Type.FLOAT_TYPE);\n");
break;
case DSUB:
buf.append("mg.math(GeneratorAdapter.SUB, Type.DOUBLE_TYPE);\n");
break;
case IMUL:
buf.append("mg.math(GeneratorAdapter.MUL, Type.INT_TYPE);\n");
break;
case LMUL:
buf.append("mg.math(GeneratorAdapter.MUL, Type.LONG_TYPE);\n");
break;
case FMUL:
buf.append("mg.math(GeneratorAdapter.MUL, Type.FLOAT_TYPE);\n");
break;
case DMUL:
buf.append("mg.math(GeneratorAdapter.MUL, Type.DOUBLE_TYPE);\n");
break;
case IDIV:
buf.append("mg.math(GeneratorAdapter.DIV, Type.INT_TYPE);\n");
break;
case LDIV:
buf.append("mg.math(GeneratorAdapter.DIV, Type.LONG_TYPE);\n");
break;
case FDIV:
buf.append("mg.math(GeneratorAdapter.DIV, Type.FLOAT_TYPE);\n");
break;
case DDIV:
buf.append("mg.math(GeneratorAdapter.DIV, Type.DOUBLE_TYPE);\n");
break;
case IREM:
buf.append("mg.math(GeneratorAdapter.REM, Type.INT_TYPE);\n");
break;
case LREM:
buf.append("mg.math(GeneratorAdapter.REM, Type.LONG_TYPE);\n");
break;
case FREM:
buf.append("mg.math(GeneratorAdapter.REM, Type.FLOAT_TYPE);\n");
break;
case DREM:
buf.append("mg.math(GeneratorAdapter.REM, Type.DOUBLE_TYPE);\n");
break;
case INEG:
buf.append("mg.math(GeneratorAdapter.NEG, Type.INT_TYPE);\n");
break;
case LNEG:
buf.append("mg.math(GeneratorAdapter.NEG, Type.LONG_TYPE);\n");
break;
case FNEG:
buf.append("mg.math(GeneratorAdapter.NEG, Type.FLOAT_TYPE);\n");
break;
case DNEG:
buf.append("mg.math(GeneratorAdapter.NEG, Type.DOUBLE_TYPE);\n");
break;
case ISHL:
buf.append("mg.math(GeneratorAdapter.SHL, Type.INT_TYPE);\n");
break;
case LSHL:
buf.append("mg.math(GeneratorAdapter.SHL, Type.LONG_TYPE);\n");
break;
case ISHR:
buf.append("mg.math(GeneratorAdapter.SHR, Type.INT_TYPE);\n");
break;
case LSHR:
buf.append("mg.math(GeneratorAdapter.SHR, Type.LONG_TYPE);\n");
break;
case IUSHR:
buf.append("mg.math(GeneratorAdapter.USHR, Type.INT_TYPE);\n");
break;
case LUSHR:
buf.append("mg.math(GeneratorAdapter.USHR, Type.LONG_TYPE);\n");
break;
case IAND:
buf.append("mg.math(GeneratorAdapter.AND, Type.INT_TYPE);\n");
break;
case LAND:
buf.append("mg.math(GeneratorAdapter.AND, Type.LONG_TYPE);\n");
break;
case IOR:
buf.append("mg.math(GeneratorAdapter.OR, Type.INT_TYPE);\n");
break;
case LOR:
buf.append("mg.math(GeneratorAdapter.OR, Type.LONG_TYPE);\n");
break;
case IXOR:
buf.append("mg.math(GeneratorAdapter.XOR, Type.INT_TYPE);\n");
break;
case LXOR:
buf.append("mg.math(GeneratorAdapter.XOR, Type.LONG_TYPE);\n");
break;
case ATHROW:
buf.append("mg.throwException();\n");
break;
case I2L:
buf.append("mg.cast(Type.INT_TYPE, Type.LONG_TYPE);\n");
break;
case I2F:
buf.append("mg.cast(Type.INT_TYPE, Type.FLOAT_TYPE);\n");
break;
case I2D:
buf.append("mg.cast(Type.INT_TYPE, Type.DOUBLE_TYPE);\n");
break;
case L2I:
buf.append("mg.cast(Type.LONG_TYPE, Type.INT_TYPE);\n");
break;
case L2F:
buf.append("mg.cast(Type.LONG_TYPE, Type.FLOAT_TYPE);\n");
break;
case L2D:
buf.append("mg.cast(Type.LONG_TYPE, Type.DOUBLE_TYPE);\n");
break;
case F2I:
buf.append("mg.cast(Type.FLOAT_TYPE, Type.INT_TYPE);\n");
break;
case F2L:
buf.append("mg.cast(Type.FLOAT_TYPE, Type.LONG_TYPE);\n");
break;
case F2D:
buf.append("mg.cast(Type.FLOAT_TYPE, Type.DOUBLE_TYPE);\n");
break;
case D2I:
buf.append("mg.cast(Type.DOUBLE_TYPE, Type.INT_TYPE);\n");
break;
case D2L:
buf.append("mg.cast(Type.DOUBLE_TYPE, Type.LONG_TYPE);\n");
break;
case D2F:
buf.append("mg.cast(Type.DOUBLE_TYPE, Type.FLOAT_TYPE);\n");
break;
case I2B:
// TODO detect if previous element in 'text' is a cast,
// for possible optimisations (e.g. cast(F,I) cast(I,B) =
// cast(F,B))
buf.append("mg.cast(Type.INT_TYPE, Type.BYTE_TYPE);\n");
break;
case I2C: // idem
buf.append("mg.cast(Type.INT_TYPE, Type.CHAR_TYPE);\n");
break;
case I2S: // idem
buf.append("mg.cast(Type.INT_TYPE, Type.SHORT_TYPE);\n");
break;
case LCMP:
case FCMPL:
case FCMPG:
case DCMPL:
case DCMPG:
// TODO detect xCMPy IF_ICMP -> ifCmp(..., ..., label)
buf.append("mg.visitInsn(")
.append(OPCODES[opcode])
.append(");\n");
break;
default:
throw new RuntimeException("unexpected case");
}
text.add(buf.toString());
lastOpcode = opcode;
}
public void visitIntInsn(final int opcode, final int operand) {
buf.setLength(0);
if (opcode == NEWARRAY) {
String type;
switch (operand) {
case T_BOOLEAN:
type = "Type.BOOLEAN_TYPE";
break;
case T_CHAR:
type = "Type.CHAR_TYPE";
break;
case T_FLOAT:
type = "Type.FLOAT_TYPE";
break;
case T_DOUBLE:
type = "Type.DOUBLE_TYPE";
break;
case T_BYTE:
type = "Type.BYTE_TYPE";
break;
case T_SHORT:
type = "Type.SHORT_TYPE";
break;
case T_INT:
type = "Type.INT_TYPE";
break;
case T_LONG:
type = "Type.LONG_TYPE";
break;
default:
throw new RuntimeException("unexpected case");
}
buf.append("mg.newArray(").append(type).append(");\n");
} else {
buf.append("mg.push(").append(operand).append(");\n");
}
text.add(buf.toString());
lastOpcode = opcode;
}
public void visitVarInsn(final int opcode, int var) {
buf.setLength(0);
switch (opcode) {
case RET:
buf.append("mg.ret(");
if (var < firstLocal) {
buf.append(var);
} else {
int v = generateNewLocal(var, "Type.INT_TYPE");
buf.append("local").append(v);
}
buf.append(");\n");
break;
case ILOAD:
generateLoadLocal(var, "Type.INT_TYPE");
break;
case LLOAD:
generateLoadLocal(var, "Type.LONG_TYPE");
break;
case FLOAD:
generateLoadLocal(var, "Type.FLOAT_TYPE");
break;
case DLOAD:
generateLoadLocal(var, "Type.DOUBLE_TYPE");
break;
case ALOAD:
generateLoadLocal(var, getType("java/lang/Object"));
break;
case ISTORE:
generateStoreLocal(var, "Type.INT_TYPE");
break;
case LSTORE:
generateStoreLocal(var, "Type.LONG_TYPE");
break;
case FSTORE:
generateStoreLocal(var, "Type.FLOAT_TYPE");
break;
case DSTORE:
generateStoreLocal(var, "Type.DOUBLE_TYPE");
break;
case ASTORE:
generateStoreLocal(var, getType("java/lang/Object"));
break;
default:
throw new RuntimeException("unexpected case");
}
text.add(buf.toString());
lastOpcode = opcode;
}
private void generateLoadLocal(int var, String type) {
if (var < firstLocal) {
if (var == 0 && (access & ACC_STATIC) == 0) {
buf.append("mg.loadThis();\n");
} else {
buf.append("mg.loadArg(")
.append(getArgIndex(var))
.append(");\n");
}
} else {
int local = generateNewLocal(var, type);
buf.append("mg.loadLocal(local").append(local);
if (!type.equals(localTypes.get(local))) {
localTypes.set(local, type);
buf.append(", ").append(type);
}
buf.append(");\n");
}
}
private void generateStoreLocal(int var, String type) {
if (var < firstLocal) {
buf.append("mg.storeArg(").append(getArgIndex(var)).append(");\n");
} else {
int local = generateNewLocal(var, type);
buf.append("mg.storeLocal(local").append(local);
if (!type.equals(localTypes.get(local))) {
localTypes.set(local, type);
buf.append(", ").append(type);
}
buf.append(");\n");
}
}
private int generateNewLocal(int var, String type) {
Integer i = (Integer) locals.get(new Integer(var));
if (i == null) {
int local = locals.size();
locals.put(new Integer(var), new Integer(local));
localTypes.add(type);
buf.append("int local" + local + " = mg.newLocal(" + type + ");\n");
return local;
}
return i.intValue();
}
private int getArgIndex(int var) {
int nextLocal = ((Opcodes.ACC_STATIC & access) != 0) ? 0 : 1;
int i = 0;
while (nextLocal != var) {
nextLocal += argumentTypes[i++].getSize();
}
return i;
}
public void visitTypeInsn(final int opcode, final String desc) {
String type;
if (desc.charAt(0) == '[') {
type = getDescType(desc);
} else {
type = getType(desc);
}
buf.setLength(0);
if (opcode == NEW) {
buf.append("mg.newInstance(").append(type).append(");\n");
} else if (opcode == ANEWARRAY) {
buf.append("mg.newArray(").append(type).append(");\n");
} else if (opcode == CHECKCAST) {
buf.append("mg.checkCast(").append(type).append(");\n");
} else if (opcode == INSTANCEOF) {
buf.append("mg.instanceOf(").append(type).append(");\n");
}
text.add(buf.toString());
lastOpcode = opcode;
}
public void visitFieldInsn(
final int opcode,
final String owner,
final String name,
final String desc)
{
buf.setLength(0);
switch (opcode) {
case GETFIELD:
buf.append("mg.getField(");
break;
case PUTFIELD:
buf.append("mg.putField(");
break;
case GETSTATIC:
buf.append("mg.getStatic(");
break;
case PUTSTATIC:
buf.append("mg.putStatic(");
break;
default:
throw new RuntimeException("unexpected case");
}
buf.append(getType(owner));
buf.append(", \"");
buf.append(name);
buf.append("\", ");
buf.append(getDescType(desc));
buf.append(");\n");
text.add(buf.toString());
lastOpcode = opcode;
}
public void visitMethodInsn(
final int opcode,
final String owner,
final String name,
final String desc)
{
buf.setLength(0);
switch (opcode) {
case INVOKEVIRTUAL:
buf.append("mg.invokeVirtual(");
break;
case INVOKESPECIAL:
buf.append("mg.invokeConstructor(");
break;
case INVOKESTATIC:
buf.append("mg.invokeStatic(");
break;
case INVOKEINTERFACE:
buf.append("mg.invokeInterface(");
break;
default:
throw new RuntimeException("unexpected case");
}
if (owner.charAt(0) == '[') {
buf.append(getDescType(owner));
} else {
buf.append(getType(owner));
}
buf.append(", ");
buf.append(getMethod(name, desc));
buf.append(");\n");
text.add(buf.toString());
lastOpcode = opcode;
}
public void visitJumpInsn(final int opcode, final Label label) {
buf.setLength(0);
declareLabel(label);
if (opcode == GOTO || opcode == IFNULL || opcode == IFNONNULL) {
if (opcode == GOTO)
buf.append("mg.goTo(");
if (opcode == IFNULL)
buf.append("mg.ifNull(");
if (opcode == IFNONNULL)
buf.append("mg.ifNonNull(");
appendLabel(label);
buf.append(");\n");
} else if (opcode == IF_ICMPEQ) {
buf.append("mg.ifICmp(GeneratorAdapter.EQ, ");
appendLabel(label);
buf.append(");\n");
} else if (opcode == IF_ICMPNE) {
buf.append("mg.ifICmp(GeneratorAdapter.NE, ");
appendLabel(label);
buf.append(");\n");
} else if (opcode == IF_ICMPLT) {
buf.append("mg.ifICmp(GeneratorAdapter.LT, ");
appendLabel(label);
buf.append(");\n");
} else if (opcode == IF_ICMPGE) {
buf.append("mg.ifICmp(GeneratorAdapter.GE, ");
appendLabel(label);
buf.append(");\n");
} else if (opcode == IF_ICMPGT) {
buf.append("mg.ifICmp(GeneratorAdapter.GT, ");
appendLabel(label);
buf.append(");\n");
} else if (opcode == IF_ICMPLE) {
buf.append("mg.ifICmp(GeneratorAdapter.LE, ");
appendLabel(label);
buf.append(");\n");
} else if (opcode == IF_ACMPEQ) {
buf.append("mg.ifCmp(");
buf.append(getType("java/lang/Object"))
.append(", ")
.append("GeneratorAdapter.EQ, ");
appendLabel(label);
buf.append(");\n");
} else if (opcode == IF_ACMPNE) {
buf.append("mg.ifCmp(");
buf.append(getType("java/lang/Object"))
.append(", ")
.append("GeneratorAdapter.NE, ");
appendLabel(label);
buf.append(");\n");
} else if (opcode == IFEQ) {
buf.append("mg.ifZCmp(GeneratorAdapter.EQ, ");
appendLabel(label);
buf.append(");\n");
} else if (opcode == IFNE) {
buf.append("mg.ifZCmp(GeneratorAdapter.NE, ");
appendLabel(label);
buf.append(");\n");
} else if (opcode == IFLT) {
buf.append("mg.ifZCmp(GeneratorAdapter.LT, ");
appendLabel(label);
buf.append(");\n");
} else if (opcode == IFGE) {
buf.append("mg.ifZCmp(GeneratorAdapter.GE, ");
appendLabel(label);
buf.append(");\n");
} else if (opcode == IFGT) {
buf.append("mg.ifZCmp(GeneratorAdapter.GT, ");
appendLabel(label);
buf.append(");\n");
} else if (opcode == IFLE) {
buf.append("mg.ifZCmp(GeneratorAdapter.LE, ");
appendLabel(label);
buf.append(");\n");
} else {
buf.append("mg.visitJumpInsn(")
.append(OPCODES[opcode])
.append(", ");
appendLabel(label);
buf.append(");\n");
}
text.add(buf.toString());
lastOpcode = opcode;
}
public void visitLabel(final Label label) {
buf.setLength(0);
declareLabel(label);
buf.append("mg.mark(");
appendLabel(label);
buf.append(");\n");
text.add(buf.toString());
lastOpcode = -1;
}
public void visitLdcInsn(final Object cst) {
buf.setLength(0);
buf.append("mg.push(");
if (cst == null) {
buf.append("(String)null");
} else if (cst instanceof Long) {
buf.append(cst + "L");
} else if (cst instanceof Float) {
float f = ((Float) cst).floatValue();
if (Float.isNaN(f)) {
buf.append("Float.NaN");
} else if (Float.isInfinite(f)) {
buf.append(f > 0
? "Float.POSITIVE_INFINITY"
: "Float.NEGATIVE_INFINITY");
} else {
buf.append(cst + "f");
}
} else if (cst instanceof Double) {
double d = ((Double) cst).doubleValue();
if (Double.isNaN(d)) {
buf.append("Double.NaN");
} else if (Double.isInfinite(d)) {
buf.append(d > 0
? "Double.POSITIVE_INFINITY"
: "Double.NEGATIVE_INFINITY");
} else {
buf.append(cst + "d");
}
} else if (cst instanceof String) {
appendString(buf, (String) cst);
} else if (cst instanceof Type) {
buf.append("Type.getType(\"").append(cst).append("\")");
} else {
buf.append(cst);
}
buf.append(");\n");
text.add(buf.toString());
lastOpcode = LDC;
}
public void visitIincInsn(final int var, final int increment) {
buf.setLength(0);
if (var < firstLocal) {
buf.append("mg.iinc(").append(var);
} else {
int v = generateNewLocal(var, "Type.INT_TYPE");
buf.append("mg.iinc(local").append(v);
}
buf.append(", ").append(increment).append(");\n");
text.add(buf.toString());
lastOpcode = IINC;
}
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("mg.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(" }); // TODO\n");
text.add(buf.toString());
lastOpcode = TABLESWITCH;
}
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("mg.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(" }); // TODO\n");
text.add(buf.toString());
lastOpcode = LOOKUPSWITCH;
}
public void visitMultiANewArrayInsn(final String desc, final int dims) {
buf.setLength(0);
buf.append("mg.visitMultiANewArrayInsn(\"");
buf.append(desc);
buf.append("\", ").append(dims).append(");\n");
text.add(buf.toString());
lastOpcode = MULTIANEWARRAY;
}
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("mg.visitTryCatchBlock(");
appendLabel(start);
buf.append(", ");
appendLabel(end);
buf.append(", ");
appendLabel(handler);
buf.append(", ");
if (type == null) {
buf.append("null");
} else {
buf.append('"').append(type).append('"');
}
buf.append("); // TODO\n");
text.add(buf.toString());
lastOpcode = -1;
}
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("mg.visitLocalVariable(\"");
buf.append(name);
buf.append("\", \"");
buf.append(desc);
buf.append("\", ");
if (signature == null) {
buf.append("null");
} else {
buf.append('"').append(signature).append('"');
}
buf.append(", ");
appendLabel(start);
buf.append(", ");
appendLabel(end);
buf.append(", ").append(index).append(");\n");
text.add(buf.toString());
lastOpcode = -1;
}
public void visitLineNumber(final int line, final Label start) {
buf.setLength(0);
buf.append("mg.visitLineNumber(").append(line).append(", ");
appendLabel(start);
buf.append(");\n");
text.add(buf.toString());
lastOpcode = -1;
}
public void visitMaxs(final int maxStack, final int maxLocals) {
text.add("mg.endMethod();\n");
lastOpcode = -1;
}
public void visitEnd() {
// does nothing
}
static String getType(String internalName) {
return "Type.getType(\"L" + internalName + ";\")";
}
static String getDescType(String desc) {
if (desc.equals("Z"))
return "Type.BOOLEAN_TYPE";
if (desc.equals("B"))
return "Type.BYTE_TYPE";
if (desc.equals("C"))
return "Type.CHAR_TYPE";
if (desc.equals("D"))
return "Type.DOUBLE_TYPE";
if (desc.equals("F"))
return "Type.FLOAT_TYPE";
if (desc.equals("I"))
return "Type.INT_TYPE";
if (desc.equals("J"))
return "Type.LONG_TYPE";
if (desc.equals("S"))
return "Type.SHORT_TYPE";
if (desc.equals("V"))
return "Type.VOID_TYPE";
return "Type.getType(\"" + desc + "\")";
}
static String getMethod(String name, String desc) {
Type rt = Type.getReturnType(desc);
Type[] argt = Type.getArgumentTypes(desc);
StringBuffer buf = new StringBuffer();
buf.append("Method.getMethod(\"");
buf.append(rt.getClassName()).append(" ");
buf.append(name).append("(");
for (int i = 0; i < argt.length; ++i) {
if (i > 0)
buf.append(',');
buf.append(argt[i].getClassName());
}
buf.append(")\")");
return buf.toString();
}
/**
* 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 = "label" + labelNames.size();
labelNames.put(l, name);
buf.append("Label ").append(name).append(" = mg.newLabel();\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));
}
}
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