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Posted to commits@tapestry.apache.org by ka...@apache.org on 2014/03/25 19:30:03 UTC
[15/23] FIXED - TAP5-2214: Make tapestry5 java8 compatible - update
ASM source to 5.0.1, should be jdk 1.5 compatible,
see ASM bug "317132 ASM 5.0 do not supported JDK 1.5?"
http://git-wip-us.apache.org/repos/asf/tapestry-5/blob/a0ac605d/plastic/src/external/java/org/apache/tapestry5/internal/plastic/asm/commons/GeneratorAdapter.java
----------------------------------------------------------------------
diff --git a/plastic/src/external/java/org/apache/tapestry5/internal/plastic/asm/commons/GeneratorAdapter.java b/plastic/src/external/java/org/apache/tapestry5/internal/plastic/asm/commons/GeneratorAdapter.java
new file mode 100644
index 0000000..ceb051f
--- /dev/null
+++ b/plastic/src/external/java/org/apache/tapestry5/internal/plastic/asm/commons/GeneratorAdapter.java
@@ -0,0 +1,1628 @@
+/***
+ * 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.tapestry5.internal.plastic.asm.commons;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import org.apache.tapestry5.internal.plastic.asm.ClassVisitor;
+import org.apache.tapestry5.internal.plastic.asm.Handle;
+import org.apache.tapestry5.internal.plastic.asm.Label;
+import org.apache.tapestry5.internal.plastic.asm.MethodVisitor;
+import org.apache.tapestry5.internal.plastic.asm.Opcodes;
+import org.apache.tapestry5.internal.plastic.asm.Type;
+
+/**
+ * A {@link org.apache.tapestry5.internal.plastic.asm.MethodVisitor} with convenient methods to generate
+ * code. For example, using this adapter, the class below
+ *
+ * <pre>
+ * public class Example {
+ * public static void main(String[] args) {
+ * System.out.println("Hello world!");
+ * }
+ * }
+ * </pre>
+ *
+ * can be generated as follows:
+ *
+ * <pre>
+ * ClassWriter cw = new ClassWriter(true);
+ * cw.visit(V1_1, ACC_PUBLIC, "Example", null, "java/lang/Object", null);
+ *
+ * Method m = Method.getMethod("void <init> ()");
+ * GeneratorAdapter mg = new GeneratorAdapter(ACC_PUBLIC, m, null, null, cw);
+ * mg.loadThis();
+ * mg.invokeConstructor(Type.getType(Object.class), m);
+ * mg.returnValue();
+ * mg.endMethod();
+ *
+ * m = Method.getMethod("void main (String[])");
+ * mg = new GeneratorAdapter(ACC_PUBLIC + ACC_STATIC, m, null, null, cw);
+ * mg.getStatic(Type.getType(System.class), "out", Type.getType(PrintStream.class));
+ * mg.push("Hello world!");
+ * mg.invokeVirtual(Type.getType(PrintStream.class),
+ * Method.getMethod("void println (String)"));
+ * mg.returnValue();
+ * mg.endMethod();
+ *
+ * cw.visitEnd();
+ * </pre>
+ *
+ * @author Juozas Baliuka
+ * @author Chris Nokleberg
+ * @author Eric Bruneton
+ * @author Prashant Deva
+ */
+public class GeneratorAdapter extends LocalVariablesSorter {
+
+ private static final String CLDESC = "Ljava/lang/Class;";
+
+ private static final Type BYTE_TYPE = Type.getObjectType("java/lang/Byte");
+
+ private static final Type BOOLEAN_TYPE = Type
+ .getObjectType("java/lang/Boolean");
+
+ private static final Type SHORT_TYPE = Type
+ .getObjectType("java/lang/Short");
+
+ private static final Type CHARACTER_TYPE = Type
+ .getObjectType("java/lang/Character");
+
+ private static final Type INTEGER_TYPE = Type
+ .getObjectType("java/lang/Integer");
+
+ private static final Type FLOAT_TYPE = Type
+ .getObjectType("java/lang/Float");
+
+ private static final Type LONG_TYPE = Type.getObjectType("java/lang/Long");
+
+ private static final Type DOUBLE_TYPE = Type
+ .getObjectType("java/lang/Double");
+
+ private static final Type NUMBER_TYPE = Type
+ .getObjectType("java/lang/Number");
+
+ private static final Type OBJECT_TYPE = Type
+ .getObjectType("java/lang/Object");
+
+ private static final Method BOOLEAN_VALUE = Method
+ .getMethod("boolean booleanValue()");
+
+ private static final Method CHAR_VALUE = Method
+ .getMethod("char charValue()");
+
+ private static final Method INT_VALUE = Method.getMethod("int intValue()");
+
+ private static final Method FLOAT_VALUE = Method
+ .getMethod("float floatValue()");
+
+ private static final Method LONG_VALUE = Method
+ .getMethod("long longValue()");
+
+ private static final Method DOUBLE_VALUE = Method
+ .getMethod("double doubleValue()");
+
+ /**
+ * Constant for the {@link #math math} method.
+ */
+ public static final int ADD = Opcodes.IADD;
+
+ /**
+ * Constant for the {@link #math math} method.
+ */
+ public static final int SUB = Opcodes.ISUB;
+
+ /**
+ * Constant for the {@link #math math} method.
+ */
+ public static final int MUL = Opcodes.IMUL;
+
+ /**
+ * Constant for the {@link #math math} method.
+ */
+ public static final int DIV = Opcodes.IDIV;
+
+ /**
+ * Constant for the {@link #math math} method.
+ */
+ public static final int REM = Opcodes.IREM;
+
+ /**
+ * Constant for the {@link #math math} method.
+ */
+ public static final int NEG = Opcodes.INEG;
+
+ /**
+ * Constant for the {@link #math math} method.
+ */
+ public static final int SHL = Opcodes.ISHL;
+
+ /**
+ * Constant for the {@link #math math} method.
+ */
+ public static final int SHR = Opcodes.ISHR;
+
+ /**
+ * Constant for the {@link #math math} method.
+ */
+ public static final int USHR = Opcodes.IUSHR;
+
+ /**
+ * Constant for the {@link #math math} method.
+ */
+ public static final int AND = Opcodes.IAND;
+
+ /**
+ * Constant for the {@link #math math} method.
+ */
+ public static final int OR = Opcodes.IOR;
+
+ /**
+ * Constant for the {@link #math math} method.
+ */
+ public static final int XOR = Opcodes.IXOR;
+
+ /**
+ * Constant for the {@link #ifCmp ifCmp} method.
+ */
+ public static final int EQ = Opcodes.IFEQ;
+
+ /**
+ * Constant for the {@link #ifCmp ifCmp} method.
+ */
+ public static final int NE = Opcodes.IFNE;
+
+ /**
+ * Constant for the {@link #ifCmp ifCmp} method.
+ */
+ public static final int LT = Opcodes.IFLT;
+
+ /**
+ * Constant for the {@link #ifCmp ifCmp} method.
+ */
+ public static final int GE = Opcodes.IFGE;
+
+ /**
+ * Constant for the {@link #ifCmp ifCmp} method.
+ */
+ public static final int GT = Opcodes.IFGT;
+
+ /**
+ * Constant for the {@link #ifCmp ifCmp} method.
+ */
+ public static final int LE = Opcodes.IFLE;
+
+ /**
+ * Access flags of the method visited by this adapter.
+ */
+ private final int access;
+
+ /**
+ * Return type of the method visited by this adapter.
+ */
+ private final Type returnType;
+
+ /**
+ * Argument types of the method visited by this adapter.
+ */
+ private final Type[] argumentTypes;
+
+ /**
+ * Types of the local variables of the method visited by this adapter.
+ */
+ private final List<Type> localTypes = new ArrayList<Type>();
+
+ /**
+ * Creates a new {@link GeneratorAdapter}. <i>Subclasses must not use this
+ * constructor</i>. Instead, they must use the
+ * {@link #GeneratorAdapter(int, MethodVisitor, int, String, String)}
+ * version.
+ *
+ * @param mv
+ * the method visitor to which this adapter delegates calls.
+ * @param access
+ * the method's access flags (see {@link Opcodes}).
+ * @param name
+ * the method's name.
+ * @param desc
+ * the method's descriptor (see {@link Type Type}).
+ * @throws IllegalStateException
+ * If a subclass calls this constructor.
+ */
+ public GeneratorAdapter(final MethodVisitor mv, final int access,
+ final String name, final String desc) {
+ this(Opcodes.ASM5, mv, access, name, desc);
+ if (getClass() != GeneratorAdapter.class) {
+ throw new IllegalStateException();
+ }
+ }
+
+ /**
+ * Creates a new {@link GeneratorAdapter}.
+ *
+ * @param api
+ * the ASM API version implemented by this visitor. Must be one
+ * of {@link Opcodes#ASM4} or {@link Opcodes#ASM5}.
+ * @param mv
+ * the method visitor to which this adapter delegates calls.
+ * @param access
+ * the method's access flags (see {@link Opcodes}).
+ * @param name
+ * the method's name.
+ * @param desc
+ * the method's descriptor (see {@link Type Type}).
+ */
+ protected GeneratorAdapter(final int api, final MethodVisitor mv,
+ final int access, final String name, final String desc) {
+ super(api, access, desc, mv);
+ this.access = access;
+ this.returnType = Type.getReturnType(desc);
+ this.argumentTypes = Type.getArgumentTypes(desc);
+ }
+
+ /**
+ * Creates a new {@link GeneratorAdapter}. <i>Subclasses must not use this
+ * constructor</i>. Instead, they must use the
+ * {@link #GeneratorAdapter(int, MethodVisitor, int, String, String)}
+ * version.
+ *
+ * @param access
+ * access flags of the adapted method.
+ * @param method
+ * the adapted method.
+ * @param mv
+ * the method visitor to which this adapter delegates calls.
+ */
+ public GeneratorAdapter(final int access, final Method method,
+ final MethodVisitor mv) {
+ this(mv, access, null, method.getDescriptor());
+ }
+
+ /**
+ * Creates a new {@link GeneratorAdapter}. <i>Subclasses must not use this
+ * constructor</i>. Instead, they must use the
+ * {@link #GeneratorAdapter(int, MethodVisitor, int, String, String)}
+ * version.
+ *
+ * @param access
+ * access flags of the adapted method.
+ * @param method
+ * the adapted method.
+ * @param signature
+ * the signature of the adapted method (may be <tt>null</tt>).
+ * @param exceptions
+ * the exceptions thrown by the adapted method (may be
+ * <tt>null</tt>).
+ * @param cv
+ * the class visitor to which this adapter delegates calls.
+ */
+ public GeneratorAdapter(final int access, final Method method,
+ final String signature, final Type[] exceptions,
+ final ClassVisitor cv) {
+ this(access, method, cv
+ .visitMethod(access, method.getName(), method.getDescriptor(),
+ signature, getInternalNames(exceptions)));
+ }
+
+ /**
+ * Returns the internal names of the given types.
+ *
+ * @param types
+ * a set of types.
+ * @return the internal names of the given types.
+ */
+ private static String[] getInternalNames(final Type[] types) {
+ if (types == null) {
+ return null;
+ }
+ String[] names = new String[types.length];
+ for (int i = 0; i < names.length; ++i) {
+ names[i] = types[i].getInternalName();
+ }
+ return names;
+ }
+
+ // ------------------------------------------------------------------------
+ // Instructions to push constants on the stack
+ // ------------------------------------------------------------------------
+
+ /**
+ * Generates the instruction to push the given value on the stack.
+ *
+ * @param value
+ * the value to be pushed on the stack.
+ */
+ public void push(final boolean value) {
+ push(value ? 1 : 0);
+ }
+
+ /**
+ * Generates the instruction to push the given value on the stack.
+ *
+ * @param value
+ * the value to be pushed on the stack.
+ */
+ public void push(final int value) {
+ if (value >= -1 && value <= 5) {
+ mv.visitInsn(Opcodes.ICONST_0 + value);
+ } else if (value >= Byte.MIN_VALUE && value <= Byte.MAX_VALUE) {
+ mv.visitIntInsn(Opcodes.BIPUSH, value);
+ } else if (value >= Short.MIN_VALUE && value <= Short.MAX_VALUE) {
+ mv.visitIntInsn(Opcodes.SIPUSH, value);
+ } else {
+ mv.visitLdcInsn(new Integer(value));
+ }
+ }
+
+ /**
+ * Generates the instruction to push the given value on the stack.
+ *
+ * @param value
+ * the value to be pushed on the stack.
+ */
+ public void push(final long value) {
+ if (value == 0L || value == 1L) {
+ mv.visitInsn(Opcodes.LCONST_0 + (int) value);
+ } else {
+ mv.visitLdcInsn(new Long(value));
+ }
+ }
+
+ /**
+ * Generates the instruction to push the given value on the stack.
+ *
+ * @param value
+ * the value to be pushed on the stack.
+ */
+ public void push(final float value) {
+ int bits = Float.floatToIntBits(value);
+ if (bits == 0L || bits == 0x3f800000 || bits == 0x40000000) { // 0..2
+ mv.visitInsn(Opcodes.FCONST_0 + (int) value);
+ } else {
+ mv.visitLdcInsn(new Float(value));
+ }
+ }
+
+ /**
+ * Generates the instruction to push the given value on the stack.
+ *
+ * @param value
+ * the value to be pushed on the stack.
+ */
+ public void push(final double value) {
+ long bits = Double.doubleToLongBits(value);
+ if (bits == 0L || bits == 0x3ff0000000000000L) { // +0.0d and 1.0d
+ mv.visitInsn(Opcodes.DCONST_0 + (int) value);
+ } else {
+ mv.visitLdcInsn(new Double(value));
+ }
+ }
+
+ /**
+ * Generates the instruction to push the given value on the stack.
+ *
+ * @param value
+ * the value to be pushed on the stack. May be <tt>null</tt>.
+ */
+ public void push(final String value) {
+ if (value == null) {
+ mv.visitInsn(Opcodes.ACONST_NULL);
+ } else {
+ mv.visitLdcInsn(value);
+ }
+ }
+
+ /**
+ * Generates the instruction to push the given value on the stack.
+ *
+ * @param value
+ * the value to be pushed on the stack.
+ */
+ public void push(final Type value) {
+ if (value == null) {
+ mv.visitInsn(Opcodes.ACONST_NULL);
+ } else {
+ switch (value.getSort()) {
+ case Type.BOOLEAN:
+ mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/Boolean",
+ "TYPE", CLDESC);
+ break;
+ case Type.CHAR:
+ mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/Character",
+ "TYPE", CLDESC);
+ break;
+ case Type.BYTE:
+ mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/Byte", "TYPE",
+ CLDESC);
+ break;
+ case Type.SHORT:
+ mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/Short", "TYPE",
+ CLDESC);
+ break;
+ case Type.INT:
+ mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/Integer",
+ "TYPE", CLDESC);
+ break;
+ case Type.FLOAT:
+ mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/Float", "TYPE",
+ CLDESC);
+ break;
+ case Type.LONG:
+ mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/Long", "TYPE",
+ CLDESC);
+ break;
+ case Type.DOUBLE:
+ mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/Double",
+ "TYPE", CLDESC);
+ break;
+ default:
+ mv.visitLdcInsn(value);
+ }
+ }
+ }
+
+ /**
+ * Generates the instruction to push a handle on the stack.
+ *
+ * @param handle
+ * the handle to be pushed on the stack.
+ */
+ public void push(final Handle handle) {
+ mv.visitLdcInsn(handle);
+ }
+
+ // ------------------------------------------------------------------------
+ // Instructions to load and store method arguments
+ // ------------------------------------------------------------------------
+
+ /**
+ * Returns the index of the given method argument in the frame's local
+ * variables array.
+ *
+ * @param arg
+ * the index of a method argument.
+ * @return the index of the given method argument in the frame's local
+ * variables array.
+ */
+ private int getArgIndex(final int arg) {
+ int index = (access & Opcodes.ACC_STATIC) == 0 ? 1 : 0;
+ for (int i = 0; i < arg; i++) {
+ index += argumentTypes[i].getSize();
+ }
+ return index;
+ }
+
+ /**
+ * Generates the instruction to push a local variable on the stack.
+ *
+ * @param type
+ * the type of the local variable to be loaded.
+ * @param index
+ * an index in the frame's local variables array.
+ */
+ private void loadInsn(final Type type, final int index) {
+ mv.visitVarInsn(type.getOpcode(Opcodes.ILOAD), index);
+ }
+
+ /**
+ * Generates the instruction to store the top stack value in a local
+ * variable.
+ *
+ * @param type
+ * the type of the local variable to be stored.
+ * @param index
+ * an index in the frame's local variables array.
+ */
+ private void storeInsn(final Type type, final int index) {
+ mv.visitVarInsn(type.getOpcode(Opcodes.ISTORE), index);
+ }
+
+ /**
+ * Generates the instruction to load 'this' on the stack.
+ */
+ public void loadThis() {
+ if ((access & Opcodes.ACC_STATIC) != 0) {
+ throw new IllegalStateException(
+ "no 'this' pointer within static method");
+ }
+ mv.visitVarInsn(Opcodes.ALOAD, 0);
+ }
+
+ /**
+ * Generates the instruction to load the given method argument on the stack.
+ *
+ * @param arg
+ * the index of a method argument.
+ */
+ public void loadArg(final int arg) {
+ loadInsn(argumentTypes[arg], getArgIndex(arg));
+ }
+
+ /**
+ * Generates the instructions to load the given method arguments on the
+ * stack.
+ *
+ * @param arg
+ * the index of the first method argument to be loaded.
+ * @param count
+ * the number of method arguments to be loaded.
+ */
+ public void loadArgs(final int arg, final int count) {
+ int index = getArgIndex(arg);
+ for (int i = 0; i < count; ++i) {
+ Type t = argumentTypes[arg + i];
+ loadInsn(t, index);
+ index += t.getSize();
+ }
+ }
+
+ /**
+ * Generates the instructions to load all the method arguments on the stack.
+ */
+ public void loadArgs() {
+ loadArgs(0, argumentTypes.length);
+ }
+
+ /**
+ * Generates the instructions to load all the method arguments on the stack,
+ * as a single object array.
+ */
+ public void loadArgArray() {
+ push(argumentTypes.length);
+ newArray(OBJECT_TYPE);
+ for (int i = 0; i < argumentTypes.length; i++) {
+ dup();
+ push(i);
+ loadArg(i);
+ box(argumentTypes[i]);
+ arrayStore(OBJECT_TYPE);
+ }
+ }
+
+ /**
+ * Generates the instruction to store the top stack value in the given
+ * method argument.
+ *
+ * @param arg
+ * the index of a method argument.
+ */
+ public void storeArg(final int arg) {
+ storeInsn(argumentTypes[arg], getArgIndex(arg));
+ }
+
+ // ------------------------------------------------------------------------
+ // Instructions to load and store local variables
+ // ------------------------------------------------------------------------
+
+ /**
+ * Returns the type of the given local variable.
+ *
+ * @param local
+ * a local variable identifier, as returned by
+ * {@link LocalVariablesSorter#newLocal(Type) newLocal()}.
+ * @return the type of the given local variable.
+ */
+ public Type getLocalType(final int local) {
+ return localTypes.get(local - firstLocal);
+ }
+
+ @Override
+ protected void setLocalType(final int local, final Type type) {
+ int index = local - firstLocal;
+ while (localTypes.size() < index + 1) {
+ localTypes.add(null);
+ }
+ localTypes.set(index, type);
+ }
+
+ /**
+ * Generates the instruction to load the given local variable on the stack.
+ *
+ * @param local
+ * a local variable identifier, as returned by
+ * {@link LocalVariablesSorter#newLocal(Type) newLocal()}.
+ */
+ public void loadLocal(final int local) {
+ loadInsn(getLocalType(local), local);
+ }
+
+ /**
+ * Generates the instruction to load the given local variable on the stack.
+ *
+ * @param local
+ * a local variable identifier, as returned by
+ * {@link LocalVariablesSorter#newLocal(Type) newLocal()}.
+ * @param type
+ * the type of this local variable.
+ */
+ public void loadLocal(final int local, final Type type) {
+ setLocalType(local, type);
+ loadInsn(type, local);
+ }
+
+ /**
+ * Generates the instruction to store the top stack value in the given local
+ * variable.
+ *
+ * @param local
+ * a local variable identifier, as returned by
+ * {@link LocalVariablesSorter#newLocal(Type) newLocal()}.
+ */
+ public void storeLocal(final int local) {
+ storeInsn(getLocalType(local), local);
+ }
+
+ /**
+ * Generates the instruction to store the top stack value in the given local
+ * variable.
+ *
+ * @param local
+ * a local variable identifier, as returned by
+ * {@link LocalVariablesSorter#newLocal(Type) newLocal()}.
+ * @param type
+ * the type of this local variable.
+ */
+ public void storeLocal(final int local, final Type type) {
+ setLocalType(local, type);
+ storeInsn(type, local);
+ }
+
+ /**
+ * Generates the instruction to load an element from an array.
+ *
+ * @param type
+ * the type of the array element to be loaded.
+ */
+ public void arrayLoad(final Type type) {
+ mv.visitInsn(type.getOpcode(Opcodes.IALOAD));
+ }
+
+ /**
+ * Generates the instruction to store an element in an array.
+ *
+ * @param type
+ * the type of the array element to be stored.
+ */
+ public void arrayStore(final Type type) {
+ mv.visitInsn(type.getOpcode(Opcodes.IASTORE));
+ }
+
+ // ------------------------------------------------------------------------
+ // Instructions to manage the stack
+ // ------------------------------------------------------------------------
+
+ /**
+ * Generates a POP instruction.
+ */
+ public void pop() {
+ mv.visitInsn(Opcodes.POP);
+ }
+
+ /**
+ * Generates a POP2 instruction.
+ */
+ public void pop2() {
+ mv.visitInsn(Opcodes.POP2);
+ }
+
+ /**
+ * Generates a DUP instruction.
+ */
+ public void dup() {
+ mv.visitInsn(Opcodes.DUP);
+ }
+
+ /**
+ * Generates a DUP2 instruction.
+ */
+ public void dup2() {
+ mv.visitInsn(Opcodes.DUP2);
+ }
+
+ /**
+ * Generates a DUP_X1 instruction.
+ */
+ public void dupX1() {
+ mv.visitInsn(Opcodes.DUP_X1);
+ }
+
+ /**
+ * Generates a DUP_X2 instruction.
+ */
+ public void dupX2() {
+ mv.visitInsn(Opcodes.DUP_X2);
+ }
+
+ /**
+ * Generates a DUP2_X1 instruction.
+ */
+ public void dup2X1() {
+ mv.visitInsn(Opcodes.DUP2_X1);
+ }
+
+ /**
+ * Generates a DUP2_X2 instruction.
+ */
+ public void dup2X2() {
+ mv.visitInsn(Opcodes.DUP2_X2);
+ }
+
+ /**
+ * Generates a SWAP instruction.
+ */
+ public void swap() {
+ mv.visitInsn(Opcodes.SWAP);
+ }
+
+ /**
+ * Generates the instructions to swap the top two stack values.
+ *
+ * @param prev
+ * type of the top - 1 stack value.
+ * @param type
+ * type of the top stack value.
+ */
+ public void swap(final Type prev, final Type type) {
+ if (type.getSize() == 1) {
+ if (prev.getSize() == 1) {
+ swap(); // same as dupX1(), pop();
+ } else {
+ dupX2();
+ pop();
+ }
+ } else {
+ if (prev.getSize() == 1) {
+ dup2X1();
+ pop2();
+ } else {
+ dup2X2();
+ pop2();
+ }
+ }
+ }
+
+ // ------------------------------------------------------------------------
+ // Instructions to do mathematical and logical operations
+ // ------------------------------------------------------------------------
+
+ /**
+ * Generates the instruction to do the specified mathematical or logical
+ * operation.
+ *
+ * @param op
+ * a mathematical or logical operation. Must be one of ADD, SUB,
+ * MUL, DIV, REM, NEG, SHL, SHR, USHR, AND, OR, XOR.
+ * @param type
+ * the type of the operand(s) for this operation.
+ */
+ public void math(final int op, final Type type) {
+ mv.visitInsn(type.getOpcode(op));
+ }
+
+ /**
+ * Generates the instructions to compute the bitwise negation of the top
+ * stack value.
+ */
+ public void not() {
+ mv.visitInsn(Opcodes.ICONST_1);
+ mv.visitInsn(Opcodes.IXOR);
+ }
+
+ /**
+ * Generates the instruction to increment the given local variable.
+ *
+ * @param local
+ * the local variable to be incremented.
+ * @param amount
+ * the amount by which the local variable must be incremented.
+ */
+ public void iinc(final int local, final int amount) {
+ mv.visitIincInsn(local, amount);
+ }
+
+ /**
+ * Generates the instructions to cast a numerical value from one type to
+ * another.
+ *
+ * @param from
+ * the type of the top stack value
+ * @param to
+ * the type into which this value must be cast.
+ */
+ public void cast(final Type from, final Type to) {
+ if (from != to) {
+ if (from == Type.DOUBLE_TYPE) {
+ if (to == Type.FLOAT_TYPE) {
+ mv.visitInsn(Opcodes.D2F);
+ } else if (to == Type.LONG_TYPE) {
+ mv.visitInsn(Opcodes.D2L);
+ } else {
+ mv.visitInsn(Opcodes.D2I);
+ cast(Type.INT_TYPE, to);
+ }
+ } else if (from == Type.FLOAT_TYPE) {
+ if (to == Type.DOUBLE_TYPE) {
+ mv.visitInsn(Opcodes.F2D);
+ } else if (to == Type.LONG_TYPE) {
+ mv.visitInsn(Opcodes.F2L);
+ } else {
+ mv.visitInsn(Opcodes.F2I);
+ cast(Type.INT_TYPE, to);
+ }
+ } else if (from == Type.LONG_TYPE) {
+ if (to == Type.DOUBLE_TYPE) {
+ mv.visitInsn(Opcodes.L2D);
+ } else if (to == Type.FLOAT_TYPE) {
+ mv.visitInsn(Opcodes.L2F);
+ } else {
+ mv.visitInsn(Opcodes.L2I);
+ cast(Type.INT_TYPE, to);
+ }
+ } else {
+ if (to == Type.BYTE_TYPE) {
+ mv.visitInsn(Opcodes.I2B);
+ } else if (to == Type.CHAR_TYPE) {
+ mv.visitInsn(Opcodes.I2C);
+ } else if (to == Type.DOUBLE_TYPE) {
+ mv.visitInsn(Opcodes.I2D);
+ } else if (to == Type.FLOAT_TYPE) {
+ mv.visitInsn(Opcodes.I2F);
+ } else if (to == Type.LONG_TYPE) {
+ mv.visitInsn(Opcodes.I2L);
+ } else if (to == Type.SHORT_TYPE) {
+ mv.visitInsn(Opcodes.I2S);
+ }
+ }
+ }
+ }
+
+ // ------------------------------------------------------------------------
+ // Instructions to do boxing and unboxing operations
+ // ------------------------------------------------------------------------
+
+ private static Type getBoxedType(final Type type) {
+ switch (type.getSort()) {
+ case Type.BYTE:
+ return BYTE_TYPE;
+ case Type.BOOLEAN:
+ return BOOLEAN_TYPE;
+ case Type.SHORT:
+ return SHORT_TYPE;
+ case Type.CHAR:
+ return CHARACTER_TYPE;
+ case Type.INT:
+ return INTEGER_TYPE;
+ case Type.FLOAT:
+ return FLOAT_TYPE;
+ case Type.LONG:
+ return LONG_TYPE;
+ case Type.DOUBLE:
+ return DOUBLE_TYPE;
+ }
+ return type;
+ }
+
+ /**
+ * Generates the instructions to box the top stack value. This value is
+ * replaced by its boxed equivalent on top of the stack.
+ *
+ * @param type
+ * the type of the top stack value.
+ */
+ public void box(final Type type) {
+ if (type.getSort() == Type.OBJECT || type.getSort() == Type.ARRAY) {
+ return;
+ }
+ if (type == Type.VOID_TYPE) {
+ push((String) null);
+ } else {
+ Type boxed = getBoxedType(type);
+ newInstance(boxed);
+ if (type.getSize() == 2) {
+ // Pp -> Ppo -> oPpo -> ooPpo -> ooPp -> o
+ dupX2();
+ dupX2();
+ pop();
+ } else {
+ // p -> po -> opo -> oop -> o
+ dupX1();
+ swap();
+ }
+ invokeConstructor(boxed, new Method("<init>", Type.VOID_TYPE,
+ new Type[] { type }));
+ }
+ }
+
+ /**
+ * Generates the instructions to box the top stack value using Java 5's
+ * valueOf() method. This value is replaced by its boxed equivalent on top
+ * of the stack.
+ *
+ * @param type
+ * the type of the top stack value.
+ */
+ public void valueOf(final Type type) {
+ if (type.getSort() == Type.OBJECT || type.getSort() == Type.ARRAY) {
+ return;
+ }
+ if (type == Type.VOID_TYPE) {
+ push((String) null);
+ } else {
+ Type boxed = getBoxedType(type);
+ invokeStatic(boxed, new Method("valueOf", boxed,
+ new Type[] { type }));
+ }
+ }
+
+ /**
+ * Generates the instructions to unbox the top stack value. This value is
+ * replaced by its unboxed equivalent on top of the stack.
+ *
+ * @param type
+ * the type of the top stack value.
+ */
+ public void unbox(final Type type) {
+ Type t = NUMBER_TYPE;
+ Method sig = null;
+ switch (type.getSort()) {
+ case Type.VOID:
+ return;
+ case Type.CHAR:
+ t = CHARACTER_TYPE;
+ sig = CHAR_VALUE;
+ break;
+ case Type.BOOLEAN:
+ t = BOOLEAN_TYPE;
+ sig = BOOLEAN_VALUE;
+ break;
+ case Type.DOUBLE:
+ sig = DOUBLE_VALUE;
+ break;
+ case Type.FLOAT:
+ sig = FLOAT_VALUE;
+ break;
+ case Type.LONG:
+ sig = LONG_VALUE;
+ break;
+ case Type.INT:
+ case Type.SHORT:
+ case Type.BYTE:
+ sig = INT_VALUE;
+ }
+ if (sig == null) {
+ checkCast(type);
+ } else {
+ checkCast(t);
+ invokeVirtual(t, sig);
+ }
+ }
+
+ // ------------------------------------------------------------------------
+ // Instructions to jump to other instructions
+ // ------------------------------------------------------------------------
+
+ /**
+ * Creates a new {@link Label}.
+ *
+ * @return a new {@link Label}.
+ */
+ public Label newLabel() {
+ return new Label();
+ }
+
+ /**
+ * Marks the current code position with the given label.
+ *
+ * @param label
+ * a label.
+ */
+ public void mark(final Label label) {
+ mv.visitLabel(label);
+ }
+
+ /**
+ * Marks the current code position with a new label.
+ *
+ * @return the label that was created to mark the current code position.
+ */
+ public Label mark() {
+ Label label = new Label();
+ mv.visitLabel(label);
+ return label;
+ }
+
+ /**
+ * Generates the instructions to jump to a label based on the comparison of
+ * the top two stack values.
+ *
+ * @param type
+ * the type of the top two stack values.
+ * @param mode
+ * how these values must be compared. One of EQ, NE, LT, GE, GT,
+ * LE.
+ * @param label
+ * where to jump if the comparison result is <tt>true</tt>.
+ */
+ public void ifCmp(final Type type, final int mode, final Label label) {
+ switch (type.getSort()) {
+ case Type.LONG:
+ mv.visitInsn(Opcodes.LCMP);
+ break;
+ case Type.DOUBLE:
+ mv.visitInsn(mode == GE || mode == GT ? Opcodes.DCMPL
+ : Opcodes.DCMPG);
+ break;
+ case Type.FLOAT:
+ mv.visitInsn(mode == GE || mode == GT ? Opcodes.FCMPL
+ : Opcodes.FCMPG);
+ break;
+ case Type.ARRAY:
+ case Type.OBJECT:
+ switch (mode) {
+ case EQ:
+ mv.visitJumpInsn(Opcodes.IF_ACMPEQ, label);
+ return;
+ case NE:
+ mv.visitJumpInsn(Opcodes.IF_ACMPNE, label);
+ return;
+ }
+ throw new IllegalArgumentException("Bad comparison for type "
+ + type);
+ default:
+ int intOp = -1;
+ switch (mode) {
+ case EQ:
+ intOp = Opcodes.IF_ICMPEQ;
+ break;
+ case NE:
+ intOp = Opcodes.IF_ICMPNE;
+ break;
+ case GE:
+ intOp = Opcodes.IF_ICMPGE;
+ break;
+ case LT:
+ intOp = Opcodes.IF_ICMPLT;
+ break;
+ case LE:
+ intOp = Opcodes.IF_ICMPLE;
+ break;
+ case GT:
+ intOp = Opcodes.IF_ICMPGT;
+ break;
+ }
+ mv.visitJumpInsn(intOp, label);
+ return;
+ }
+ mv.visitJumpInsn(mode, label);
+ }
+
+ /**
+ * Generates the instructions to jump to a label based on the comparison of
+ * the top two integer stack values.
+ *
+ * @param mode
+ * how these values must be compared. One of EQ, NE, LT, GE, GT,
+ * LE.
+ * @param label
+ * where to jump if the comparison result is <tt>true</tt>.
+ */
+ public void ifICmp(final int mode, final Label label) {
+ ifCmp(Type.INT_TYPE, mode, label);
+ }
+
+ /**
+ * Generates the instructions to jump to a label based on the comparison of
+ * the top integer stack value with zero.
+ *
+ * @param mode
+ * how these values must be compared. One of EQ, NE, LT, GE, GT,
+ * LE.
+ * @param label
+ * where to jump if the comparison result is <tt>true</tt>.
+ */
+ public void ifZCmp(final int mode, final Label label) {
+ mv.visitJumpInsn(mode, label);
+ }
+
+ /**
+ * Generates the instruction to jump to the given label if the top stack
+ * value is null.
+ *
+ * @param label
+ * where to jump if the condition is <tt>true</tt>.
+ */
+ public void ifNull(final Label label) {
+ mv.visitJumpInsn(Opcodes.IFNULL, label);
+ }
+
+ /**
+ * Generates the instruction to jump to the given label if the top stack
+ * value is not null.
+ *
+ * @param label
+ * where to jump if the condition is <tt>true</tt>.
+ */
+ public void ifNonNull(final Label label) {
+ mv.visitJumpInsn(Opcodes.IFNONNULL, label);
+ }
+
+ /**
+ * Generates the instruction to jump to the given label.
+ *
+ * @param label
+ * where to jump if the condition is <tt>true</tt>.
+ */
+ public void goTo(final Label label) {
+ mv.visitJumpInsn(Opcodes.GOTO, label);
+ }
+
+ /**
+ * Generates a RET instruction.
+ *
+ * @param local
+ * a local variable identifier, as returned by
+ * {@link LocalVariablesSorter#newLocal(Type) newLocal()}.
+ */
+ public void ret(final int local) {
+ mv.visitVarInsn(Opcodes.RET, local);
+ }
+
+ /**
+ * Generates the instructions for a switch statement.
+ *
+ * @param keys
+ * the switch case keys.
+ * @param generator
+ * a generator to generate the code for the switch cases.
+ */
+ public void tableSwitch(final int[] keys,
+ final TableSwitchGenerator generator) {
+ float density;
+ if (keys.length == 0) {
+ density = 0;
+ } else {
+ density = (float) keys.length
+ / (keys[keys.length - 1] - keys[0] + 1);
+ }
+ tableSwitch(keys, generator, density >= 0.5f);
+ }
+
+ /**
+ * Generates the instructions for a switch statement.
+ *
+ * @param keys
+ * the switch case keys.
+ * @param generator
+ * a generator to generate the code for the switch cases.
+ * @param useTable
+ * <tt>true</tt> to use a TABLESWITCH instruction, or
+ * <tt>false</tt> to use a LOOKUPSWITCH instruction.
+ */
+ public void tableSwitch(final int[] keys,
+ final TableSwitchGenerator generator, final boolean useTable) {
+ for (int i = 1; i < keys.length; ++i) {
+ if (keys[i] < keys[i - 1]) {
+ throw new IllegalArgumentException(
+ "keys must be sorted ascending");
+ }
+ }
+ Label def = newLabel();
+ Label end = newLabel();
+ if (keys.length > 0) {
+ int len = keys.length;
+ int min = keys[0];
+ int max = keys[len - 1];
+ int range = max - min + 1;
+ if (useTable) {
+ Label[] labels = new Label[range];
+ Arrays.fill(labels, def);
+ for (int i = 0; i < len; ++i) {
+ labels[keys[i] - min] = newLabel();
+ }
+ mv.visitTableSwitchInsn(min, max, def, labels);
+ for (int i = 0; i < range; ++i) {
+ Label label = labels[i];
+ if (label != def) {
+ mark(label);
+ generator.generateCase(i + min, end);
+ }
+ }
+ } else {
+ Label[] labels = new Label[len];
+ for (int i = 0; i < len; ++i) {
+ labels[i] = newLabel();
+ }
+ mv.visitLookupSwitchInsn(def, keys, labels);
+ for (int i = 0; i < len; ++i) {
+ mark(labels[i]);
+ generator.generateCase(keys[i], end);
+ }
+ }
+ }
+ mark(def);
+ generator.generateDefault();
+ mark(end);
+ }
+
+ /**
+ * Generates the instruction to return the top stack value to the caller.
+ */
+ public void returnValue() {
+ mv.visitInsn(returnType.getOpcode(Opcodes.IRETURN));
+ }
+
+ // ------------------------------------------------------------------------
+ // Instructions to load and store fields
+ // ------------------------------------------------------------------------
+
+ /**
+ * Generates a get field or set field instruction.
+ *
+ * @param opcode
+ * the instruction's opcode.
+ * @param ownerType
+ * the class in which the field is defined.
+ * @param name
+ * the name of the field.
+ * @param fieldType
+ * the type of the field.
+ */
+ private void fieldInsn(final int opcode, final Type ownerType,
+ final String name, final Type fieldType) {
+ mv.visitFieldInsn(opcode, ownerType.getInternalName(), name,
+ fieldType.getDescriptor());
+ }
+
+ /**
+ * Generates the instruction to push the value of a static field on the
+ * stack.
+ *
+ * @param owner
+ * the class in which the field is defined.
+ * @param name
+ * the name of the field.
+ * @param type
+ * the type of the field.
+ */
+ public void getStatic(final Type owner, final String name, final Type type) {
+ fieldInsn(Opcodes.GETSTATIC, owner, name, type);
+ }
+
+ /**
+ * Generates the instruction to store the top stack value in a static field.
+ *
+ * @param owner
+ * the class in which the field is defined.
+ * @param name
+ * the name of the field.
+ * @param type
+ * the type of the field.
+ */
+ public void putStatic(final Type owner, final String name, final Type type) {
+ fieldInsn(Opcodes.PUTSTATIC, owner, name, type);
+ }
+
+ /**
+ * Generates the instruction to push the value of a non static field on the
+ * stack.
+ *
+ * @param owner
+ * the class in which the field is defined.
+ * @param name
+ * the name of the field.
+ * @param type
+ * the type of the field.
+ */
+ public void getField(final Type owner, final String name, final Type type) {
+ fieldInsn(Opcodes.GETFIELD, owner, name, type);
+ }
+
+ /**
+ * Generates the instruction to store the top stack value in a non static
+ * field.
+ *
+ * @param owner
+ * the class in which the field is defined.
+ * @param name
+ * the name of the field.
+ * @param type
+ * the type of the field.
+ */
+ public void putField(final Type owner, final String name, final Type type) {
+ fieldInsn(Opcodes.PUTFIELD, owner, name, type);
+ }
+
+ // ------------------------------------------------------------------------
+ // Instructions to invoke methods
+ // ------------------------------------------------------------------------
+
+ /**
+ * Generates an invoke method instruction.
+ *
+ * @param opcode
+ * the instruction's opcode.
+ * @param type
+ * the class in which the method is defined.
+ * @param method
+ * the method to be invoked.
+ */
+ private void invokeInsn(final int opcode, final Type type,
+ final Method method, final boolean itf) {
+ String owner = type.getSort() == Type.ARRAY ? type.getDescriptor()
+ : type.getInternalName();
+ mv.visitMethodInsn(opcode, owner, method.getName(),
+ method.getDescriptor(), itf);
+ }
+
+ /**
+ * Generates the instruction to invoke a normal method.
+ *
+ * @param owner
+ * the class in which the method is defined.
+ * @param method
+ * the method to be invoked.
+ */
+ public void invokeVirtual(final Type owner, final Method method) {
+ invokeInsn(Opcodes.INVOKEVIRTUAL, owner, method, false);
+ }
+
+ /**
+ * Generates the instruction to invoke a constructor.
+ *
+ * @param type
+ * the class in which the constructor is defined.
+ * @param method
+ * the constructor to be invoked.
+ */
+ public void invokeConstructor(final Type type, final Method method) {
+ invokeInsn(Opcodes.INVOKESPECIAL, type, method, false);
+ }
+
+ /**
+ * Generates the instruction to invoke a static method.
+ *
+ * @param owner
+ * the class in which the method is defined.
+ * @param method
+ * the method to be invoked.
+ */
+ public void invokeStatic(final Type owner, final Method method) {
+ invokeInsn(Opcodes.INVOKESTATIC, owner, method, false);
+ }
+
+ /**
+ * Generates the instruction to invoke an interface method.
+ *
+ * @param owner
+ * the class in which the method is defined.
+ * @param method
+ * the method to be invoked.
+ */
+ public void invokeInterface(final Type owner, final Method method) {
+ invokeInsn(Opcodes.INVOKEINTERFACE, owner, method, true);
+ }
+
+ /**
+ * Generates an invokedynamic instruction.
+ *
+ * @param name
+ * the method's name.
+ * @param desc
+ * the method's descriptor (see {@link Type Type}).
+ * @param bsm
+ * the bootstrap method.
+ * @param bsmArgs
+ * the bootstrap method constant arguments. Each argument must be
+ * an {@link Integer}, {@link Float}, {@link Long},
+ * {@link Double}, {@link String}, {@link Type} or {@link Handle}
+ * value. This method is allowed to modify the content of the
+ * array so a caller should expect that this array may change.
+ */
+ public void invokeDynamic(String name, String desc, Handle bsm,
+ Object... bsmArgs) {
+ mv.visitInvokeDynamicInsn(name, desc, bsm, bsmArgs);
+ }
+
+ // ------------------------------------------------------------------------
+ // Instructions to create objects and arrays
+ // ------------------------------------------------------------------------
+
+ /**
+ * Generates a type dependent instruction.
+ *
+ * @param opcode
+ * the instruction's opcode.
+ * @param type
+ * the instruction's operand.
+ */
+ private void typeInsn(final int opcode, final Type type) {
+ mv.visitTypeInsn(opcode, type.getInternalName());
+ }
+
+ /**
+ * Generates the instruction to create a new object.
+ *
+ * @param type
+ * the class of the object to be created.
+ */
+ public void newInstance(final Type type) {
+ typeInsn(Opcodes.NEW, type);
+ }
+
+ /**
+ * Generates the instruction to create a new array.
+ *
+ * @param type
+ * the type of the array elements.
+ */
+ public void newArray(final Type type) {
+ int typ;
+ switch (type.getSort()) {
+ case Type.BOOLEAN:
+ typ = Opcodes.T_BOOLEAN;
+ break;
+ case Type.CHAR:
+ typ = Opcodes.T_CHAR;
+ break;
+ case Type.BYTE:
+ typ = Opcodes.T_BYTE;
+ break;
+ case Type.SHORT:
+ typ = Opcodes.T_SHORT;
+ break;
+ case Type.INT:
+ typ = Opcodes.T_INT;
+ break;
+ case Type.FLOAT:
+ typ = Opcodes.T_FLOAT;
+ break;
+ case Type.LONG:
+ typ = Opcodes.T_LONG;
+ break;
+ case Type.DOUBLE:
+ typ = Opcodes.T_DOUBLE;
+ break;
+ default:
+ typeInsn(Opcodes.ANEWARRAY, type);
+ return;
+ }
+ mv.visitIntInsn(Opcodes.NEWARRAY, typ);
+ }
+
+ // ------------------------------------------------------------------------
+ // Miscelaneous instructions
+ // ------------------------------------------------------------------------
+
+ /**
+ * Generates the instruction to compute the length of an array.
+ */
+ public void arrayLength() {
+ mv.visitInsn(Opcodes.ARRAYLENGTH);
+ }
+
+ /**
+ * Generates the instruction to throw an exception.
+ */
+ public void throwException() {
+ mv.visitInsn(Opcodes.ATHROW);
+ }
+
+ /**
+ * Generates the instructions to create and throw an exception. The
+ * exception class must have a constructor with a single String argument.
+ *
+ * @param type
+ * the class of the exception to be thrown.
+ * @param msg
+ * the detailed message of the exception.
+ */
+ public void throwException(final Type type, final String msg) {
+ newInstance(type);
+ dup();
+ push(msg);
+ invokeConstructor(type, Method.getMethod("void <init> (String)"));
+ throwException();
+ }
+
+ /**
+ * Generates the instruction to check that the top stack value is of the
+ * given type.
+ *
+ * @param type
+ * a class or interface type.
+ */
+ public void checkCast(final Type type) {
+ if (!type.equals(OBJECT_TYPE)) {
+ typeInsn(Opcodes.CHECKCAST, type);
+ }
+ }
+
+ /**
+ * Generates the instruction to test if the top stack value is of the given
+ * type.
+ *
+ * @param type
+ * a class or interface type.
+ */
+ public void instanceOf(final Type type) {
+ typeInsn(Opcodes.INSTANCEOF, type);
+ }
+
+ /**
+ * Generates the instruction to get the monitor of the top stack value.
+ */
+ public void monitorEnter() {
+ mv.visitInsn(Opcodes.MONITORENTER);
+ }
+
+ /**
+ * Generates the instruction to release the monitor of the top stack value.
+ */
+ public void monitorExit() {
+ mv.visitInsn(Opcodes.MONITOREXIT);
+ }
+
+ // ------------------------------------------------------------------------
+ // Non instructions
+ // ------------------------------------------------------------------------
+
+ /**
+ * Marks the end of the visited method.
+ */
+ public void endMethod() {
+ if ((access & Opcodes.ACC_ABSTRACT) == 0) {
+ mv.visitMaxs(0, 0);
+ }
+ mv.visitEnd();
+ }
+
+ /**
+ * Marks the start of an exception handler.
+ *
+ * @param start
+ * beginning of the exception handler's scope (inclusive).
+ * @param end
+ * end of the exception handler's scope (exclusive).
+ * @param exception
+ * internal name of the type of exceptions handled by the
+ * handler.
+ */
+ public void catchException(final Label start, final Label end,
+ final Type exception) {
+ if (exception == null) {
+ mv.visitTryCatchBlock(start, end, mark(), null);
+ } else {
+ mv.visitTryCatchBlock(start, end, mark(),
+ exception.getInternalName());
+ }
+ }
+}