diff options
Diffstat (limited to 'infrastructure/rhino1_7R1/src/org/mozilla/classfile')
| -rw-r--r-- | infrastructure/rhino1_7R1/src/org/mozilla/classfile/ByteCode.java | 274 | ||||
| -rw-r--r-- | infrastructure/rhino1_7R1/src/org/mozilla/classfile/ClassFileWriter.java | 3038 |
2 files changed, 3312 insertions, 0 deletions
diff --git a/infrastructure/rhino1_7R1/src/org/mozilla/classfile/ByteCode.java b/infrastructure/rhino1_7R1/src/org/mozilla/classfile/ByteCode.java new file mode 100644 index 0000000..fa4713e --- /dev/null +++ b/infrastructure/rhino1_7R1/src/org/mozilla/classfile/ByteCode.java @@ -0,0 +1,274 @@ +/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * + * ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is Rhino code, released + * May 6, 1999. + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 1997-1999 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * Roger Lawrence + * + * Alternatively, the contents of this file may be used under the terms of + * the GNU General Public License Version 2 or later (the "GPL"), in which + * case the provisions of the GPL are applicable instead of those above. If + * you wish to allow use of your version of this file only under the terms of + * the GPL and not to allow others to use your version of this file under the + * MPL, indicate your decision by deleting the provisions above and replacing + * them with the notice and other provisions required by the GPL. If you do + * not delete the provisions above, a recipient may use your version of this + * file under either the MPL or the GPL. + * + * ***** END LICENSE BLOCK ***** */ + +package org.mozilla.classfile; + +/** + * This class provides opcode values expected by the JVM in Java class files. + * + * It also provides tables for internal use by the ClassFileWriter. + * + * @author Roger Lawrence + */ +public class ByteCode { + + /** + * The byte opcodes defined by the Java Virtual Machine. + */ + public static final int + NOP = 0x00, + ACONST_NULL = 0x01, + ICONST_M1 = 0x02, + ICONST_0 = 0x03, + ICONST_1 = 0x04, + ICONST_2 = 0x05, + ICONST_3 = 0x06, + ICONST_4 = 0x07, + ICONST_5 = 0x08, + LCONST_0 = 0x09, + LCONST_1 = 0x0A, + FCONST_0 = 0x0B, + FCONST_1 = 0x0C, + FCONST_2 = 0x0D, + DCONST_0 = 0x0E, + DCONST_1 = 0x0F, + BIPUSH = 0x10, + SIPUSH = 0x11, + LDC = 0x12, + LDC_W = 0x13, + LDC2_W = 0x14, + ILOAD = 0x15, + LLOAD = 0x16, + FLOAD = 0x17, + DLOAD = 0x18, + ALOAD = 0x19, + ILOAD_0 = 0x1A, + ILOAD_1 = 0x1B, + ILOAD_2 = 0x1C, + ILOAD_3 = 0x1D, + LLOAD_0 = 0x1E, + LLOAD_1 = 0x1F, + LLOAD_2 = 0x20, + LLOAD_3 = 0x21, + FLOAD_0 = 0x22, + FLOAD_1 = 0x23, + FLOAD_2 = 0x24, + FLOAD_3 = 0x25, + DLOAD_0 = 0x26, + DLOAD_1 = 0x27, + DLOAD_2 = 0x28, + DLOAD_3 = 0x29, + ALOAD_0 = 0x2A, + ALOAD_1 = 0x2B, + ALOAD_2 = 0x2C, + ALOAD_3 = 0x2D, + IALOAD = 0x2E, + LALOAD = 0x2F, + FALOAD = 0x30, + DALOAD = 0x31, + AALOAD = 0x32, + BALOAD = 0x33, + CALOAD = 0x34, + SALOAD = 0x35, + ISTORE = 0x36, + LSTORE = 0x37, + FSTORE = 0x38, + DSTORE = 0x39, + ASTORE = 0x3A, + ISTORE_0 = 0x3B, + ISTORE_1 = 0x3C, + ISTORE_2 = 0x3D, + ISTORE_3 = 0x3E, + LSTORE_0 = 0x3F, + LSTORE_1 = 0x40, + LSTORE_2 = 0x41, + LSTORE_3 = 0x42, + FSTORE_0 = 0x43, + FSTORE_1 = 0x44, + FSTORE_2 = 0x45, + FSTORE_3 = 0x46, + DSTORE_0 = 0x47, + DSTORE_1 = 0x48, + DSTORE_2 = 0x49, + DSTORE_3 = 0x4A, + ASTORE_0 = 0x4B, + ASTORE_1 = 0x4C, + ASTORE_2 = 0x4D, + ASTORE_3 = 0x4E, + IASTORE = 0x4F, + LASTORE = 0x50, + FASTORE = 0x51, + DASTORE = 0x52, + AASTORE = 0x53, + BASTORE = 0x54, + CASTORE = 0x55, + SASTORE = 0x56, + POP = 0x57, + POP2 = 0x58, + DUP = 0x59, + DUP_X1 = 0x5A, + DUP_X2 = 0x5B, + DUP2 = 0x5C, + DUP2_X1 = 0x5D, + DUP2_X2 = 0x5E, + SWAP = 0x5F, + IADD = 0x60, + LADD = 0x61, + FADD = 0x62, + DADD = 0x63, + ISUB = 0x64, + LSUB = 0x65, + FSUB = 0x66, + DSUB = 0x67, + IMUL = 0x68, + LMUL = 0x69, + FMUL = 0x6A, + DMUL = 0x6B, + IDIV = 0x6C, + LDIV = 0x6D, + FDIV = 0x6E, + DDIV = 0x6F, + IREM = 0x70, + LREM = 0x71, + FREM = 0x72, + DREM = 0x73, + INEG = 0x74, + LNEG = 0x75, + FNEG = 0x76, + DNEG = 0x77, + ISHL = 0x78, + LSHL = 0x79, + ISHR = 0x7A, + LSHR = 0x7B, + IUSHR = 0x7C, + LUSHR = 0x7D, + IAND = 0x7E, + LAND = 0x7F, + IOR = 0x80, + LOR = 0x81, + IXOR = 0x82, + LXOR = 0x83, + IINC = 0x84, + I2L = 0x85, + I2F = 0x86, + I2D = 0x87, + L2I = 0x88, + L2F = 0x89, + L2D = 0x8A, + F2I = 0x8B, + F2L = 0x8C, + F2D = 0x8D, + D2I = 0x8E, + D2L = 0x8F, + D2F = 0x90, + I2B = 0x91, + I2C = 0x92, + I2S = 0x93, + LCMP = 0x94, + FCMPL = 0x95, + FCMPG = 0x96, + DCMPL = 0x97, + DCMPG = 0x98, + IFEQ = 0x99, + IFNE = 0x9A, + IFLT = 0x9B, + IFGE = 0x9C, + IFGT = 0x9D, + IFLE = 0x9E, + IF_ICMPEQ = 0x9F, + IF_ICMPNE = 0xA0, + IF_ICMPLT = 0xA1, + IF_ICMPGE = 0xA2, + IF_ICMPGT = 0xA3, + IF_ICMPLE = 0xA4, + IF_ACMPEQ = 0xA5, + IF_ACMPNE = 0xA6, + GOTO = 0xA7, + JSR = 0xA8, + RET = 0xA9, + TABLESWITCH = 0xAA, + LOOKUPSWITCH = 0xAB, + IRETURN = 0xAC, + LRETURN = 0xAD, + FRETURN = 0xAE, + DRETURN = 0xAF, + ARETURN = 0xB0, + RETURN = 0xB1, + GETSTATIC = 0xB2, + PUTSTATIC = 0xB3, + GETFIELD = 0xB4, + PUTFIELD = 0xB5, + INVOKEVIRTUAL = 0xB6, + INVOKESPECIAL = 0xB7, + INVOKESTATIC = 0xB8, + INVOKEINTERFACE = 0xB9, + NEW = 0xBB, + NEWARRAY = 0xBC, + ANEWARRAY = 0xBD, + ARRAYLENGTH = 0xBE, + ATHROW = 0xBF, + CHECKCAST = 0xC0, + INSTANCEOF = 0xC1, + MONITORENTER = 0xC2, + MONITOREXIT = 0xC3, + WIDE = 0xC4, + MULTIANEWARRAY = 0xC5, + IFNULL = 0xC6, + IFNONNULL = 0xC7, + GOTO_W = 0xC8, + JSR_W = 0xC9, + BREAKPOINT = 0xCA, + + IMPDEP1 = 0xFE, + IMPDEP2 = 0xFF; + + /** + * Types for the NEWARRAY opcode. + */ + public static final byte + T_BOOLEAN = 4, + T_CHAR = 5, + T_FLOAT = 6, + T_DOUBLE = 7, + T_BYTE = 8, + T_SHORT = 9, + T_INT = 10, + T_LONG = 11; + + +} diff --git a/infrastructure/rhino1_7R1/src/org/mozilla/classfile/ClassFileWriter.java b/infrastructure/rhino1_7R1/src/org/mozilla/classfile/ClassFileWriter.java new file mode 100644 index 0000000..b9c6c96 --- /dev/null +++ b/infrastructure/rhino1_7R1/src/org/mozilla/classfile/ClassFileWriter.java @@ -0,0 +1,3038 @@ +/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * + * ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is Rhino code, released + * May 6, 1999. + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 1997-1999 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * Roger Lawrence + * + * Alternatively, the contents of this file may be used under the terms of + * the GNU General Public License Version 2 or later (the "GPL"), in which + * case the provisions of the GPL are applicable instead of those above. If + * you wish to allow use of your version of this file only under the terms of + * the GPL and not to allow others to use your version of this file under the + * MPL, indicate your decision by deleting the provisions above and replacing + * them with the notice and other provisions required by the GPL. If you do + * not delete the provisions above, a recipient may use your version of this + * file under either the MPL or the GPL. + * + * ***** END LICENSE BLOCK ***** */ + +package org.mozilla.classfile; + +import org.mozilla.javascript.ObjToIntMap; +import org.mozilla.javascript.ObjArray; +import org.mozilla.javascript.UintMap; + +import java.io.*; + +/** + * ClassFileWriter + * + * A ClassFileWriter is used to write a Java class file. Methods are + * provided to create fields and methods, and within methods to write + * Java bytecodes. + * + * @author Roger Lawrence + */ +public class ClassFileWriter { + + /** + * Thrown for cases where the error in generating the class file is + * due to a program size constraints rather than a likely bug in the + * compiler. + */ + public static class ClassFileFormatException extends RuntimeException { + ClassFileFormatException(String message) { + super(message); + } + } + + /** + * Construct a ClassFileWriter for a class. + * + * @param className the name of the class to write, including + * full package qualification. + * @param superClassName the name of the superclass of the class + * to write, including full package qualification. + * @param sourceFileName the name of the source file to use for + * producing debug information, or null if debug information + * is not desired + */ + public ClassFileWriter(String className, String superClassName, + String sourceFileName) + { + generatedClassName = className; + itsConstantPool = new ConstantPool(this); + itsThisClassIndex = itsConstantPool.addClass(className); + itsSuperClassIndex = itsConstantPool.addClass(superClassName); + if (sourceFileName != null) + itsSourceFileNameIndex = itsConstantPool.addUtf8(sourceFileName); + itsFlags = ACC_PUBLIC; + } + + public final String getClassName() + { + return generatedClassName; + } + + /** + * Add an interface implemented by this class. + * + * This method may be called multiple times for classes that + * implement multiple interfaces. + * + * @param interfaceName a name of an interface implemented + * by the class being written, including full package + * qualification. + */ + public void addInterface(String interfaceName) { + short interfaceIndex = itsConstantPool.addClass(interfaceName); + itsInterfaces.add(new Short(interfaceIndex)); + } + + public static final short + ACC_PUBLIC = 0x0001, + ACC_PRIVATE = 0x0002, + ACC_PROTECTED = 0x0004, + ACC_STATIC = 0x0008, + ACC_FINAL = 0x0010, + ACC_SYNCHRONIZED = 0x0020, + ACC_VOLATILE = 0x0040, + ACC_TRANSIENT = 0x0080, + ACC_NATIVE = 0x0100, + ACC_ABSTRACT = 0x0400; + + /** + * Set the class's flags. + * + * Flags must be a set of the following flags, bitwise or'd + * together: + * ACC_PUBLIC + * ACC_PRIVATE + * ACC_PROTECTED + * ACC_FINAL + * ACC_ABSTRACT + * TODO: check that this is the appropriate set + * @param flags the set of class flags to set + */ + public void setFlags(short flags) { + itsFlags = flags; + } + + static String getSlashedForm(String name) + { + return name.replace('.', '/'); + } + + /** + * Convert Java class name in dot notation into + * "Lname-with-dots-replaced-by-slashes;" form suitable for use as + * JVM type signatures. + */ + public static String classNameToSignature(String name) + { + int nameLength = name.length(); + int colonPos = 1 + nameLength; + char[] buf = new char[colonPos + 1]; + buf[0] = 'L'; + buf[colonPos] = ';'; + name.getChars(0, nameLength, buf, 1); + for (int i = 1; i != colonPos; ++i) { + if (buf[i] == '.') { + buf[i] = '/'; + } + } + return new String(buf, 0, colonPos + 1); + } + + /** + * Add a field to the class. + * + * @param fieldName the name of the field + * @param type the type of the field using ... + * @param flags the attributes of the field, such as ACC_PUBLIC, etc. + * bitwise or'd together + */ + public void addField(String fieldName, String type, short flags) { + short fieldNameIndex = itsConstantPool.addUtf8(fieldName); + short typeIndex = itsConstantPool.addUtf8(type); + itsFields.add(new ClassFileField(fieldNameIndex, typeIndex, flags)); + } + + /** + * Add a field to the class. + * + * @param fieldName the name of the field + * @param type the type of the field using ... + * @param flags the attributes of the field, such as ACC_PUBLIC, etc. + * bitwise or'd together + * @param value an initial integral value + */ + public void addField(String fieldName, String type, short flags, + int value) + { + short fieldNameIndex = itsConstantPool.addUtf8(fieldName); + short typeIndex = itsConstantPool.addUtf8(type); + ClassFileField field = new ClassFileField(fieldNameIndex, typeIndex, + flags); + field.setAttributes(itsConstantPool.addUtf8("ConstantValue"), + (short)0, + (short)0, + itsConstantPool.addConstant(value)); + itsFields.add(field); + } + + /** + * Add a field to the class. + * + * @param fieldName the name of the field + * @param type the type of the field using ... + * @param flags the attributes of the field, such as ACC_PUBLIC, etc. + * bitwise or'd together + * @param value an initial long value + */ + public void addField(String fieldName, String type, short flags, + long value) + { + short fieldNameIndex = itsConstantPool.addUtf8(fieldName); + short typeIndex = itsConstantPool.addUtf8(type); + ClassFileField field = new ClassFileField(fieldNameIndex, typeIndex, + flags); + field.setAttributes(itsConstantPool.addUtf8("ConstantValue"), + (short)0, + (short)2, + itsConstantPool.addConstant(value)); + itsFields.add(field); + } + + /** + * Add a field to the class. + * + * @param fieldName the name of the field + * @param type the type of the field using ... + * @param flags the attributes of the field, such as ACC_PUBLIC, etc. + * bitwise or'd together + * @param value an initial double value + */ + public void addField(String fieldName, String type, short flags, + double value) + { + short fieldNameIndex = itsConstantPool.addUtf8(fieldName); + short typeIndex = itsConstantPool.addUtf8(type); + ClassFileField field = new ClassFileField(fieldNameIndex, typeIndex, + flags); + field.setAttributes(itsConstantPool.addUtf8("ConstantValue"), + (short)0, + (short)2, + itsConstantPool.addConstant(value)); + itsFields.add(field); + } + + /** + * Add Information about java variable to use when generating the local + * variable table. + * + * @param name variable name. + * @param type variable type as bytecode descriptor string. + * @param startPC the starting bytecode PC where this variable is live, + * or -1 if it does not have a Java register. + * @param register the Java register number of variable + * or -1 if it does not have a Java register. + */ + public void addVariableDescriptor(String name, String type, int startPC, int register) + { + int nameIndex = itsConstantPool.addUtf8(name); + int descriptorIndex = itsConstantPool.addUtf8(type); + int [] chunk = { nameIndex, descriptorIndex, startPC, register }; + if (itsVarDescriptors == null) { + itsVarDescriptors = new ObjArray(); + } + itsVarDescriptors.add(chunk); + } + + /** + * Add a method and begin adding code. + * + * This method must be called before other methods for adding code, + * exception tables, etc. can be invoked. + * + * @param methodName the name of the method + * @param type a string representing the type + * @param flags the attributes of the field, such as ACC_PUBLIC, etc. + * bitwise or'd together + */ + public void startMethod(String methodName, String type, short flags) { + short methodNameIndex = itsConstantPool.addUtf8(methodName); + short typeIndex = itsConstantPool.addUtf8(type); + itsCurrentMethod = new ClassFileMethod(methodNameIndex, typeIndex, + flags); + itsMethods.add(itsCurrentMethod); + } + + /** + * Complete generation of the method. + * + * After this method is called, no more code can be added to the + * method begun with <code>startMethod</code>. + * + * @param maxLocals the maximum number of local variable slots + * (a.k.a. Java registers) used by the method + */ + public void stopMethod(short maxLocals) { + if (itsCurrentMethod == null) + throw new IllegalStateException("No method to stop"); + + fixLabelGotos(); + + itsMaxLocals = maxLocals; + + int lineNumberTableLength = 0; + if (itsLineNumberTable != null) { + // 6 bytes for the attribute header + // 2 bytes for the line number count + // 4 bytes for each entry + lineNumberTableLength = 6 + 2 + (itsLineNumberTableTop * 4); + } + + int variableTableLength = 0; + if (itsVarDescriptors != null) { + // 6 bytes for the attribute header + // 2 bytes for the variable count + // 10 bytes for each entry + variableTableLength = 6 + 2 + (itsVarDescriptors.size() * 10); + } + + int attrLength = 2 + // attribute_name_index + 4 + // attribute_length + 2 + // max_stack + 2 + // max_locals + 4 + // code_length + itsCodeBufferTop + + 2 + // exception_table_length + (itsExceptionTableTop * 8) + + 2 + // attributes_count + lineNumberTableLength + + variableTableLength; + + if (attrLength > 65536) { + // See http://java.sun.com/docs/books/jvms/second_edition/html/ClassFile.doc.html, + // section 4.10, "The amount of code per non-native, non-abstract + // method is limited to 65536 bytes... + throw new ClassFileFormatException( + "generated bytecode for method exceeds 64K limit."); + } + byte[] codeAttribute = new byte[attrLength]; + int index = 0; + int codeAttrIndex = itsConstantPool.addUtf8("Code"); + index = putInt16(codeAttrIndex, codeAttribute, index); + attrLength -= 6; // discount the attribute header + index = putInt32(attrLength, codeAttribute, index); + index = putInt16(itsMaxStack, codeAttribute, index); + index = putInt16(itsMaxLocals, codeAttribute, index); + index = putInt32(itsCodeBufferTop, codeAttribute, index); + System.arraycopy(itsCodeBuffer, 0, codeAttribute, index, + itsCodeBufferTop); + index += itsCodeBufferTop; + + if (itsExceptionTableTop > 0) { + index = putInt16(itsExceptionTableTop, codeAttribute, index); + for (int i = 0; i < itsExceptionTableTop; i++) { + ExceptionTableEntry ete = itsExceptionTable[i]; + short startPC = (short)getLabelPC(ete.itsStartLabel); + short endPC = (short)getLabelPC(ete.itsEndLabel); + short handlerPC = (short)getLabelPC(ete.itsHandlerLabel); + short catchType = ete.itsCatchType; + if (startPC == -1) + throw new IllegalStateException("start label not defined"); + if (endPC == -1) + throw new IllegalStateException("end label not defined"); + if (handlerPC == -1) + throw new IllegalStateException( + "handler label not defined"); + + index = putInt16(startPC, codeAttribute, index); + index = putInt16(endPC, codeAttribute, index); + index = putInt16(handlerPC, codeAttribute, index); + index = putInt16(catchType, codeAttribute, index); + } + } + else { + // write 0 as exception table length + index = putInt16(0, codeAttribute, index); + } + + int attributeCount = 0; + if (itsLineNumberTable != null) + attributeCount++; + if (itsVarDescriptors != null) + attributeCount++; + index = putInt16(attributeCount, codeAttribute, index); + + if (itsLineNumberTable != null) { + int lineNumberTableAttrIndex + = itsConstantPool.addUtf8("LineNumberTable"); + index = putInt16(lineNumberTableAttrIndex, codeAttribute, index); + int tableAttrLength = 2 + (itsLineNumberTableTop * 4); + index = putInt32(tableAttrLength, codeAttribute, index); + index = putInt16(itsLineNumberTableTop, codeAttribute, index); + for (int i = 0; i < itsLineNumberTableTop; i++) { + index = putInt32(itsLineNumberTable[i], codeAttribute, index); + } + } + + if (itsVarDescriptors != null) { + int variableTableAttrIndex + = itsConstantPool.addUtf8("LocalVariableTable"); + index = putInt16(variableTableAttrIndex, codeAttribute, index); + int varCount = itsVarDescriptors.size(); + int tableAttrLength = 2 + (varCount * 10); + index = putInt32(tableAttrLength, codeAttribute, index); + index = putInt16(varCount, codeAttribute, index); + for (int i = 0; i < varCount; i++) { + int[] chunk = (int[])itsVarDescriptors.get(i); + int nameIndex = chunk[0]; + int descriptorIndex = chunk[1]; + int startPC = chunk[2]; + int register = chunk[3]; + int length = itsCodeBufferTop - startPC; + + index = putInt16(startPC, codeAttribute, index); + index = putInt16(length, codeAttribute, index); + index = putInt16(nameIndex, codeAttribute, index); + index = putInt16(descriptorIndex, codeAttribute, index); + index = putInt16(register, codeAttribute, index); + } + } + + itsCurrentMethod.setCodeAttribute(codeAttribute); + + itsExceptionTable = null; + itsExceptionTableTop = 0; + itsLineNumberTableTop = 0; + itsCodeBufferTop = 0; + itsCurrentMethod = null; + itsMaxStack = 0; + itsStackTop = 0; + itsLabelTableTop = 0; + itsFixupTableTop = 0; + itsVarDescriptors = null; + } + + /** + * Add the single-byte opcode to the current method. + * + * @param theOpCode the opcode of the bytecode + */ + public void add(int theOpCode) { + if (opcodeCount(theOpCode) != 0) + throw new IllegalArgumentException("Unexpected operands"); + int newStack = itsStackTop + stackChange(theOpCode); + if (newStack < 0 || Short.MAX_VALUE < newStack) badStack(newStack); + if (DEBUGCODE) + System.out.println("Add " + bytecodeStr(theOpCode)); + addToCodeBuffer(theOpCode); + itsStackTop = (short)newStack; + if (newStack > itsMaxStack) itsMaxStack = (short)newStack; + if (DEBUGSTACK) { + System.out.println("After "+bytecodeStr(theOpCode) + +" stack = "+itsStackTop); + } + } + + /** + * Add a single-operand opcode to the current method. + * + * @param theOpCode the opcode of the bytecode + * @param theOperand the operand of the bytecode + */ + public void add(int theOpCode, int theOperand) { + if (DEBUGCODE) { + System.out.println("Add "+bytecodeStr(theOpCode) + +", "+Integer.toHexString(theOperand)); + } + int newStack = itsStackTop + stackChange(theOpCode); + if (newStack < 0 || Short.MAX_VALUE < newStack) badStack(newStack); + + switch (theOpCode) { + case ByteCode.GOTO : + // fallthru... + case ByteCode.IFEQ : + case ByteCode.IFNE : + case ByteCode.IFLT : + case ByteCode.IFGE : + case ByteCode.IFGT : + case ByteCode.IFLE : + case ByteCode.IF_ICMPEQ : + case ByteCode.IF_ICMPNE : + case ByteCode.IF_ICMPLT : + case ByteCode.IF_ICMPGE : + case ByteCode.IF_ICMPGT : + case ByteCode.IF_ICMPLE : + case ByteCode.IF_ACMPEQ : + case ByteCode.IF_ACMPNE : + case ByteCode.JSR : + case ByteCode.IFNULL : + case ByteCode.IFNONNULL : { + if ((theOperand & 0x80000000) != 0x80000000) { + if ((theOperand < 0) || (theOperand > 65535)) + throw new IllegalArgumentException( + "Bad label for branch"); + } + int branchPC = itsCodeBufferTop; + addToCodeBuffer(theOpCode); + if ((theOperand & 0x80000000) != 0x80000000) { + // hard displacement + addToCodeInt16(theOperand); + } + else { // a label + int targetPC = getLabelPC(theOperand); + if (DEBUGLABELS) { + int theLabel = theOperand & 0x7FFFFFFF; + System.out.println("Fixing branch to " + + theLabel + " at " + targetPC + + " from " + branchPC); + } + if (targetPC != -1) { + int offset = targetPC - branchPC; + addToCodeInt16(offset); + } + else { + addLabelFixup(theOperand, branchPC + 1); + addToCodeInt16(0); + } + } + } + break; + + case ByteCode.BIPUSH : + if ((byte)theOperand != theOperand) + throw new IllegalArgumentException("out of range byte"); + addToCodeBuffer(theOpCode); + addToCodeBuffer((byte)theOperand); + break; + + case ByteCode.SIPUSH : + if ((short)theOperand != theOperand) + throw new IllegalArgumentException("out of range short"); + addToCodeBuffer(theOpCode); + addToCodeInt16(theOperand); + break; + + case ByteCode.NEWARRAY : + if (!(0 <= theOperand && theOperand < 256)) + throw new IllegalArgumentException("out of range index"); + addToCodeBuffer(theOpCode); + addToCodeBuffer(theOperand); + break; + + case ByteCode.GETFIELD : + case ByteCode.PUTFIELD : + if (!(0 <= theOperand && theOperand < 65536)) + throw new IllegalArgumentException("out of range field"); + addToCodeBuffer(theOpCode); + addToCodeInt16(theOperand); + break; + + case ByteCode.LDC : + case ByteCode.LDC_W : + case ByteCode.LDC2_W : + if (!(0 <= theOperand && theOperand < 65536)) + throw new IllegalArgumentException("out of range index"); + if (theOperand >= 256 + || theOpCode == ByteCode.LDC_W + || theOpCode == ByteCode.LDC2_W) + { + if (theOpCode == ByteCode.LDC) { + addToCodeBuffer(ByteCode.LDC_W); + } else { + addToCodeBuffer(theOpCode); + } + addToCodeInt16(theOperand); + } else { + addToCodeBuffer(theOpCode); + addToCodeBuffer(theOperand); + } + break; + + case ByteCode.RET : + case ByteCode.ILOAD : + case ByteCode.LLOAD : + case ByteCode.FLOAD : + case ByteCode.DLOAD : + case ByteCode.ALOAD : + case ByteCode.ISTORE : + case ByteCode.LSTORE : + case ByteCode.FSTORE : + case ByteCode.DSTORE : + case ByteCode.ASTORE : + if (!(0 <= theOperand && theOperand < 65536)) + throw new ClassFileFormatException("out of range variable"); + if (theOperand >= 256) { + addToCodeBuffer(ByteCode.WIDE); + addToCodeBuffer(theOpCode); + addToCodeInt16(theOperand); + } + else { + addToCodeBuffer(theOpCode); + addToCodeBuffer(theOperand); + } + break; + + default : + throw new IllegalArgumentException( + "Unexpected opcode for 1 operand"); + } + + itsStackTop = (short)newStack; + if (newStack > itsMaxStack) itsMaxStack = (short)newStack; + if (DEBUGSTACK) { + System.out.println("After "+bytecodeStr(theOpCode) + +" stack = "+itsStackTop); + } + } + + /** + * Generate the load constant bytecode for the given integer. + * + * @param k the constant + */ + public void addLoadConstant(int k) { + switch (k) { + case 0: add(ByteCode.ICONST_0); break; + case 1: add(ByteCode.ICONST_1); break; + case 2: add(ByteCode.ICONST_2); break; + case 3: add(ByteCode.ICONST_3); break; + case 4: add(ByteCode.ICONST_4); break; + case 5: add(ByteCode.ICONST_5); break; + default: + add(ByteCode.LDC, itsConstantPool.addConstant(k)); + break; + } + } + + /** + * Generate the load constant bytecode for the given long. + * + * @param k the constant + */ + public void addLoadConstant(long k) { + add(ByteCode.LDC2_W, itsConstantPool.addConstant(k)); + } + + /** + * Generate the load constant bytecode for the given float. + * + * @param k the constant + */ + public void addLoadConstant(float k) { + add(ByteCode.LDC, itsConstantPool.addConstant(k)); + } + + /** + * Generate the load constant bytecode for the given double. + * + * @param k the constant + */ + public void addLoadConstant(double k) { + add(ByteCode.LDC2_W, itsConstantPool.addConstant(k)); + } + + /** + * Generate the load constant bytecode for the given string. + * + * @param k the constant + */ + public void addLoadConstant(String k) { + add(ByteCode.LDC, itsConstantPool.addConstant(k)); + } + + /** + * Add the given two-operand bytecode to the current method. + * + * @param theOpCode the opcode of the bytecode + * @param theOperand1 the first operand of the bytecode + * @param theOperand2 the second operand of the bytecode + */ + public void add(int theOpCode, int theOperand1, int theOperand2) { + if (DEBUGCODE) { + System.out.println("Add "+bytecodeStr(theOpCode) + +", "+Integer.toHexString(theOperand1) + +", "+Integer.toHexString(theOperand2)); + } + int newStack = itsStackTop + stackChange(theOpCode); + if (newStack < 0 || Short.MAX_VALUE < newStack) badStack(newStack); + + if (theOpCode == ByteCode.IINC) { + if (!(0 <= theOperand1 && theOperand1 < 65536)) + throw new ClassFileFormatException("out of range variable"); + if (!(0 <= theOperand2 && theOperand2 < 65536)) + throw new ClassFileFormatException("out of range increment"); + + if (theOperand1 > 255 || theOperand2 < -128 || theOperand2 > 127) { + addToCodeBuffer(ByteCode.WIDE); + addToCodeBuffer(ByteCode.IINC); + addToCodeInt16(theOperand1); + addToCodeInt16(theOperand2); + } + else { + addToCodeBuffer(ByteCode.WIDE); + addToCodeBuffer(ByteCode.IINC); + addToCodeBuffer(theOperand1); + addToCodeBuffer(theOperand2); + } + } + else if (theOpCode == ByteCode.MULTIANEWARRAY) { + if (!(0 <= theOperand1 && theOperand1 < 65536)) + throw new IllegalArgumentException("out of range index"); + if (!(0 <= theOperand2 && theOperand2 < 256)) + throw new IllegalArgumentException("out of range dimensions"); + + addToCodeBuffer(ByteCode.MULTIANEWARRAY); + addToCodeInt16(theOperand1); + addToCodeBuffer(theOperand2); + } + else { + throw new IllegalArgumentException( + "Unexpected opcode for 2 operands"); + } + itsStackTop = (short)newStack; + if (newStack > itsMaxStack) itsMaxStack = (short)newStack; + if (DEBUGSTACK) { + System.out.println("After "+bytecodeStr(theOpCode) + +" stack = "+itsStackTop); + } + + } + + public void add(int theOpCode, String className) { + if (DEBUGCODE) { + System.out.println("Add "+bytecodeStr(theOpCode) + +", "+className); + } + int newStack = itsStackTop + stackChange(theOpCode); + if (newStack < 0 || Short.MAX_VALUE < newStack) badStack(newStack); + switch (theOpCode) { + case ByteCode.NEW : + case ByteCode.ANEWARRAY : + case ByteCode.CHECKCAST : + case ByteCode.INSTANCEOF : { + short classIndex = itsConstantPool.addClass(className); + addToCodeBuffer(theOpCode); + addToCodeInt16(classIndex); + } + break; + + default : + throw new IllegalArgumentException( + "bad opcode for class reference"); + } + itsStackTop = (short)newStack; + if (newStack > itsMaxStack) itsMaxStack = (short)newStack; + if (DEBUGSTACK) { + System.out.println("After "+bytecodeStr(theOpCode) + +" stack = "+itsStackTop); + } + } + + + public void add(int theOpCode, String className, String fieldName, + String fieldType) + { + if (DEBUGCODE) { + System.out.println("Add "+bytecodeStr(theOpCode) + +", "+className+", "+fieldName+", "+fieldType); + } + int newStack = itsStackTop + stackChange(theOpCode); + char fieldTypeChar = fieldType.charAt(0); + int fieldSize = (fieldTypeChar == 'J' || fieldTypeChar == 'D') + ? 2 : 1; + switch (theOpCode) { + case ByteCode.GETFIELD : + case ByteCode.GETSTATIC : + newStack += fieldSize; + break; + case ByteCode.PUTSTATIC : + case ByteCode.PUTFIELD : + newStack -= fieldSize; + break; + default : + throw new IllegalArgumentException( + "bad opcode for field reference"); + } + if (newStack < 0 || Short.MAX_VALUE < newStack) badStack(newStack); + short fieldRefIndex = itsConstantPool.addFieldRef(className, + fieldName, fieldType); + addToCodeBuffer(theOpCode); + addToCodeInt16(fieldRefIndex); + + itsStackTop = (short)newStack; + if (newStack > itsMaxStack) itsMaxStack = (short)newStack; + if (DEBUGSTACK) { + System.out.println("After "+bytecodeStr(theOpCode) + +" stack = "+itsStackTop); + } + } + + public void addInvoke(int theOpCode, String className, String methodName, + String methodType) + { + if (DEBUGCODE) { + System.out.println("Add "+bytecodeStr(theOpCode) + +", "+className+", "+methodName+", " + +methodType); + } + int parameterInfo = sizeOfParameters(methodType); + int parameterCount = parameterInfo >>> 16; + int stackDiff = (short)parameterInfo; + + int newStack = itsStackTop + stackDiff; + newStack += stackChange(theOpCode); // adjusts for 'this' + if (newStack < 0 || Short.MAX_VALUE < newStack) badStack(newStack); + + switch (theOpCode) { + case ByteCode.INVOKEVIRTUAL : + case ByteCode.INVOKESPECIAL : + case ByteCode.INVOKESTATIC : + case ByteCode.INVOKEINTERFACE : { + addToCodeBuffer(theOpCode); + if (theOpCode == ByteCode.INVOKEINTERFACE) { + short ifMethodRefIndex + = itsConstantPool.addInterfaceMethodRef( + className, methodName, + methodType); + addToCodeInt16(ifMethodRefIndex); + addToCodeBuffer(parameterCount + 1); + addToCodeBuffer(0); + } + else { + short methodRefIndex = itsConstantPool.addMethodRef( + className, methodName, + methodType); + addToCodeInt16(methodRefIndex); + } + } + break; + + default : + throw new IllegalArgumentException( + "bad opcode for method reference"); + } + itsStackTop = (short)newStack; + if (newStack > itsMaxStack) itsMaxStack = (short)newStack; + if (DEBUGSTACK) { + System.out.println("After "+bytecodeStr(theOpCode) + +" stack = "+itsStackTop); + } + } + + /** + * Generate code to load the given integer on stack. + * + * @param k the constant + */ + public void addPush(int k) + { + if ((byte)k == k) { + if (k == -1) { + add(ByteCode.ICONST_M1); + } else if (0 <= k && k <= 5) { + add((byte)(ByteCode.ICONST_0 + k)); + } else { + add(ByteCode.BIPUSH, (byte)k); + } + } else if ((short)k == k) { + add(ByteCode.SIPUSH, (short)k); + } else { + addLoadConstant(k); + } + } + + public void addPush(boolean k) + { + add(k ? ByteCode.ICONST_1 : ByteCode.ICONST_0); + } + + /** + * Generate code to load the given long on stack. + * + * @param k the constant + */ + public void addPush(long k) + { + int ik = (int)k; + if (ik == k) { + addPush(ik); + add(ByteCode.I2L); + } else { + addLoadConstant(k); + } + } + + /** + * Generate code to load the given double on stack. + * + * @param k the constant + */ + public void addPush(double k) + { + if (k == 0.0) { + // zero + add(ByteCode.DCONST_0); + if (1.0 / k < 0) { + // Negative zero + add(ByteCode.DNEG); + } + } else if (k == 1.0 || k == -1.0) { + add(ByteCode.DCONST_1); + if (k < 0) { + add(ByteCode.DNEG); + } + } else { + addLoadConstant(k); + } + } + + /** + * Generate the code to leave on stack the given string even if the + * string encoding exeeds the class file limit for single string constant + * + * @param k the constant + */ + public void addPush(String k) { + int length = k.length(); + int limit = itsConstantPool.getUtfEncodingLimit(k, 0, length); + if (limit == length) { + addLoadConstant(k); + return; + } + // Split string into picies fitting the UTF limit and generate code for + // StringBuffer sb = new StringBuffer(length); + // sb.append(loadConstant(piece_1)); + // ... + // sb.append(loadConstant(piece_N)); + // sb.toString(); + final String SB = "java/lang/StringBuffer"; + add(ByteCode.NEW, SB); + add(ByteCode.DUP); + addPush(length); + addInvoke(ByteCode.INVOKESPECIAL, SB, "<init>", "(I)V"); + int cursor = 0; + for (;;) { + add(ByteCode.DUP); + String s = k.substring(cursor, limit); + addLoadConstant(s); + addInvoke(ByteCode.INVOKEVIRTUAL, SB, "append", + "(Ljava/lang/String;)Ljava/lang/StringBuffer;"); + add(ByteCode.POP); + if (limit == length) { + break; + } + cursor = limit; + limit = itsConstantPool.getUtfEncodingLimit(k, limit, length); + } + addInvoke(ByteCode.INVOKEVIRTUAL, SB, "toString", + "()Ljava/lang/String;"); + } + + /** + * Check if k fits limit on string constant size imposed by class file + * format. + * + * @param k the string constant + */ + public boolean isUnderStringSizeLimit(String k) + { + return itsConstantPool.isUnderUtfEncodingLimit(k); + } + + /** + * Store integer from stack top into the given local. + * + * @param local number of local register + */ + public void addIStore(int local) + { + xop(ByteCode.ISTORE_0, ByteCode.ISTORE, local); + } + + /** + * Store long from stack top into the given local. + * + * @param local number of local register + */ + public void addLStore(int local) + { + xop(ByteCode.LSTORE_0, ByteCode.LSTORE, local); + } + + /** + * Store float from stack top into the given local. + * + * @param local number of local register + */ + public void addFStore(int local) + { + xop(ByteCode.FSTORE_0, ByteCode.FSTORE, local); + } + + /** + * Store double from stack top into the given local. + * + * @param local number of local register + */ + public void addDStore(int local) + { + xop(ByteCode.DSTORE_0, ByteCode.DSTORE, local); + } + + /** + * Store object from stack top into the given local. + * + * @param local number of local register + */ + public void addAStore(int local) + { + xop(ByteCode.ASTORE_0, ByteCode.ASTORE, local); + } + + /** + * Load integer from the given local into stack. + * + * @param local number of local register + */ + public void addILoad(int local) + { + xop(ByteCode.ILOAD_0, ByteCode.ILOAD, local); + } + + /** + * Load long from the given local into stack. + * + * @param local number of local register + */ + public void addLLoad(int local) + { + xop(ByteCode.LLOAD_0, ByteCode.LLOAD, local); + } + + /** + * Load float from the given local into stack. + * + * @param local number of local register + */ + public void addFLoad(int local) + { + xop(ByteCode.FLOAD_0, ByteCode.FLOAD, local); + } + + /** + * Load double from the given local into stack. + * + * @param local number of local register + */ + public void addDLoad(int local) + { + xop(ByteCode.DLOAD_0, ByteCode.DLOAD, local); + } + + /** + * Load object from the given local into stack. + * + * @param local number of local register + */ + public void addALoad(int local) + { + xop(ByteCode.ALOAD_0, ByteCode.ALOAD, local); + } + + /** + * Load "this" into stack. + */ + public void addLoadThis() + { + add(ByteCode.ALOAD_0); + } + + private void xop(int shortOp, int op, int local) + { + switch (local) { + case 0: + add(shortOp); + break; + case 1: + add(shortOp + 1); + break; + case 2: + add(shortOp + 2); + break; + case 3: + add(shortOp + 3); + break; + default: + add(op, local); + } + } + + public int addTableSwitch(int low, int high) + { + if (DEBUGCODE) { + System.out.println("Add "+bytecodeStr(ByteCode.TABLESWITCH) + +" "+low+" "+high); + } + if (low > high) + throw new ClassFileFormatException("Bad bounds: "+low+' '+ high); + + int newStack = itsStackTop + stackChange(ByteCode.TABLESWITCH); + if (newStack < 0 || Short.MAX_VALUE < newStack) badStack(newStack); + + int entryCount = high - low + 1; + int padSize = 3 & ~itsCodeBufferTop; // == 3 - itsCodeBufferTop % 4 + + int N = addReservedCodeSpace(1 + padSize + 4 * (1 + 2 + entryCount)); + int switchStart = N; + itsCodeBuffer[N++] = (byte)ByteCode.TABLESWITCH; + while (padSize != 0) { + itsCodeBuffer[N++] = 0; + --padSize; + } + N += 4; // skip default offset + N = putInt32(low, itsCodeBuffer, N); + putInt32(high, itsCodeBuffer, N); + + itsStackTop = (short)newStack; + if (newStack > itsMaxStack) itsMaxStack = (short)newStack; + if (DEBUGSTACK) { + System.out.println("After "+bytecodeStr(ByteCode.TABLESWITCH) + +" stack = "+itsStackTop); + } + + return switchStart; + } + + public final void markTableSwitchDefault(int switchStart) + { + setTableSwitchJump(switchStart, -1, itsCodeBufferTop); + } + + public final void markTableSwitchCase(int switchStart, int caseIndex) + { + setTableSwitchJump(switchStart, caseIndex, itsCodeBufferTop); + } + + public final void markTableSwitchCase(int switchStart, int caseIndex, + int stackTop) + { + if (!(0 <= stackTop && stackTop <= itsMaxStack)) + throw new IllegalArgumentException("Bad stack index: "+stackTop); + itsStackTop = (short)stackTop; + setTableSwitchJump(switchStart, caseIndex, itsCodeBufferTop); + } + + public void setTableSwitchJump(int switchStart, int caseIndex, + int jumpTarget) + { + if (!(0 <= jumpTarget && jumpTarget <= itsCodeBufferTop)) + throw new IllegalArgumentException("Bad jump target: "+jumpTarget); + if (!(caseIndex >= -1)) + throw new IllegalArgumentException("Bad case index: "+caseIndex); + + int padSize = 3 & ~switchStart; // == 3 - switchStart % 4 + int caseOffset; + if (caseIndex < 0) { + // default label + caseOffset = switchStart + 1 + padSize; + } else { + caseOffset = switchStart + 1 + padSize + 4 * (3 + caseIndex); + } + if (!(0 <= switchStart + && switchStart <= itsCodeBufferTop - 4 * 4 - padSize - 1)) + { + throw new IllegalArgumentException( + switchStart+" is outside a possible range of tableswitch" + +" in already generated code"); + } + if ((0xFF & itsCodeBuffer[switchStart]) != ByteCode.TABLESWITCH) { + throw new IllegalArgumentException( + switchStart+" is not offset of tableswitch statement"); + } + if (!(0 <= caseOffset && caseOffset + 4 <= itsCodeBufferTop)) { + // caseIndex >= -1 does not guarantee that caseOffset >= 0 due + // to a possible overflow. + throw new ClassFileFormatException( + "Too big case index: "+caseIndex); + } + // ALERT: perhaps check against case bounds? + putInt32(jumpTarget - switchStart, itsCodeBuffer, caseOffset); + } + + public int acquireLabel() + { + int top = itsLabelTableTop; + if (itsLabelTable == null || top == itsLabelTable.length) { + if (itsLabelTable == null) { + itsLabelTable = new int[MIN_LABEL_TABLE_SIZE]; + }else { + int[] tmp = new int[itsLabelTable.length * 2]; + System.arraycopy(itsLabelTable, 0, tmp, 0, top); + itsLabelTable = tmp; + } + } + itsLabelTableTop = top + 1; + itsLabelTable[top] = -1; + return top | 0x80000000; + } + + public void markLabel(int label) + { + if (!(label < 0)) + throw new IllegalArgumentException("Bad label, no biscuit"); + + label &= 0x7FFFFFFF; + if (label > itsLabelTableTop) + throw new IllegalArgumentException("Bad label"); + + if (itsLabelTable[label] != -1) { + throw new IllegalStateException("Can only mark label once"); + } + + itsLabelTable[label] = itsCodeBufferTop; + } + + public void markLabel(int label, short stackTop) + { + markLabel(label); + itsStackTop = stackTop; + } + + public void markHandler(int theLabel) { + itsStackTop = 1; + markLabel(theLabel); + } + + private int getLabelPC(int label) + { + if (!(label < 0)) + throw new IllegalArgumentException("Bad label, no biscuit"); + label &= 0x7FFFFFFF; + if (!(label < itsLabelTableTop)) + throw new IllegalArgumentException("Bad label"); + return itsLabelTable[label]; + } + + private void addLabelFixup(int label, int fixupSite) + { + if (!(label < 0)) + throw new IllegalArgumentException("Bad label, no biscuit"); + label &= 0x7FFFFFFF; + if (!(label < itsLabelTableTop)) + throw new IllegalArgumentException("Bad label"); + int top = itsFixupTableTop; + if (itsFixupTable == null || top == itsFixupTable.length) { + if (itsFixupTable == null) { + itsFixupTable = new long[MIN_FIXUP_TABLE_SIZE]; + }else { + long[] tmp = new long[itsFixupTable.length * 2]; + System.arraycopy(itsFixupTable, 0, tmp, 0, top); + itsFixupTable = tmp; + } + } + itsFixupTableTop = top + 1; + itsFixupTable[top] = ((long)label << 32) | fixupSite; + } + + private void fixLabelGotos() + { + byte[] codeBuffer = itsCodeBuffer; + for (int i = 0; i < itsFixupTableTop; i++) { + long fixup = itsFixupTable[i]; + int label = (int)(fixup >> 32); + int fixupSite = (int)fixup; + int pc = itsLabelTable[label]; + if (pc == -1) { + // Unlocated label + throw new RuntimeException(); + } + // -1 to get delta from instruction start + int offset = pc - (fixupSite - 1); + if ((short)offset != offset) { + throw new ClassFileFormatException + ("Program too complex: too big jump offset"); + } + codeBuffer[fixupSite] = (byte)(offset >> 8); + codeBuffer[fixupSite + 1] = (byte)offset; + } + itsFixupTableTop = 0; + } + + /** + * Get the current offset into the code of the current method. + * + * @return an integer representing the offset + */ + public int getCurrentCodeOffset() { + return itsCodeBufferTop; + } + + public short getStackTop() { + return itsStackTop; + } + + public void setStackTop(short n) { + itsStackTop = n; + } + + public void adjustStackTop(int delta) { + int newStack = itsStackTop + delta; + if (newStack < 0 || Short.MAX_VALUE < newStack) badStack(newStack); + itsStackTop = (short)newStack; + if (newStack > itsMaxStack) itsMaxStack = (short)newStack; + if (DEBUGSTACK) { + System.out.println("After "+"adjustStackTop("+delta+")" + +" stack = "+itsStackTop); + } + } + + private void addToCodeBuffer(int b) + { + int N = addReservedCodeSpace(1); + itsCodeBuffer[N] = (byte)b; + } + + private void addToCodeInt16(int value) + { + int N = addReservedCodeSpace(2); + putInt16(value, itsCodeBuffer, N); + } + + private int addReservedCodeSpace(int size) + { + if (itsCurrentMethod == null) + throw new IllegalArgumentException("No method to add to"); + int oldTop = itsCodeBufferTop; + int newTop = oldTop + size; + if (newTop > itsCodeBuffer.length) { + int newSize = itsCodeBuffer.length * 2; + if (newTop > newSize) { newSize = newTop; } + byte[] tmp = new byte[newSize]; + System.arraycopy(itsCodeBuffer, 0, tmp, 0, oldTop); + itsCodeBuffer = tmp; + } + itsCodeBufferTop = newTop; + return oldTop; + } + + public void addExceptionHandler(int startLabel, int endLabel, + int handlerLabel, String catchClassName) + { + if ((startLabel & 0x80000000) != 0x80000000) + throw new IllegalArgumentException("Bad startLabel"); + if ((endLabel & 0x80000000) != 0x80000000) + throw new IllegalArgumentException("Bad endLabel"); + if ((handlerLabel & 0x80000000) != 0x80000000) + throw new IllegalArgumentException("Bad handlerLabel"); + + /* + * If catchClassName is null, use 0 for the catch_type_index; which + * means catch everything. (Even when the verifier has let you throw + * something other than a Throwable.) + */ + short catch_type_index = (catchClassName == null) + ? 0 + : itsConstantPool.addClass(catchClassName); + ExceptionTableEntry newEntry = new ExceptionTableEntry( + startLabel, + endLabel, + handlerLabel, + catch_type_index); + int N = itsExceptionTableTop; + if (N == 0) { + itsExceptionTable = new ExceptionTableEntry[ExceptionTableSize]; + } else if (N == itsExceptionTable.length) { + ExceptionTableEntry[] tmp = new ExceptionTableEntry[N * 2]; + System.arraycopy(itsExceptionTable, 0, tmp, 0, N); + itsExceptionTable = tmp; + } + itsExceptionTable[N] = newEntry; + itsExceptionTableTop = N + 1; + + } + + public void addLineNumberEntry(short lineNumber) { + if (itsCurrentMethod == null) + throw new IllegalArgumentException("No method to stop"); + int N = itsLineNumberTableTop; + if (N == 0) { + itsLineNumberTable = new int[LineNumberTableSize]; + } else if (N == itsLineNumberTable.length) { + int[] tmp = new int[N * 2]; + System.arraycopy(itsLineNumberTable, 0, tmp, 0, N); + itsLineNumberTable = tmp; + } + itsLineNumberTable[N] = (itsCodeBufferTop << 16) + lineNumber; + itsLineNumberTableTop = N + 1; + } + + /** + * Write the class file to the OutputStream. + * + * @param oStream the stream to write to + * @throws IOException if writing to the stream produces an exception + */ + public void write(OutputStream oStream) + throws IOException + { + byte[] array = toByteArray(); + oStream.write(array); + } + + private int getWriteSize() + { + int size = 0; + + if (itsSourceFileNameIndex != 0) { + itsConstantPool.addUtf8("SourceFile"); + } + + size += 8; //writeLong(FileHeaderConstant); + size += itsConstantPool.getWriteSize(); + size += 2; //writeShort(itsFlags); + size += 2; //writeShort(itsThisClassIndex); + size += 2; //writeShort(itsSuperClassIndex); + size += 2; //writeShort(itsInterfaces.size()); + size += 2 * itsInterfaces.size(); + + size += 2; //writeShort(itsFields.size()); + for (int i = 0; i < itsFields.size(); i++) { + size += ((ClassFileField)(itsFields.get(i))).getWriteSize(); + } + + size += 2; //writeShort(itsMethods.size()); + for (int i = 0; i < itsMethods.size(); i++) { + size += ((ClassFileMethod)(itsMethods.get(i))).getWriteSize(); + } + + if (itsSourceFileNameIndex != 0) { + size += 2; //writeShort(1); attributes count + size += 2; //writeShort(sourceFileAttributeNameIndex); + size += 4; //writeInt(2); + size += 2; //writeShort(itsSourceFileNameIndex); + }else { + size += 2; //out.writeShort(0); no attributes + } + + return size; + } + + /** + * Get the class file as array of bytesto the OutputStream. + */ + public byte[] toByteArray() + { + int dataSize = getWriteSize(); + byte[] data = new byte[dataSize]; + int offset = 0; + + short sourceFileAttributeNameIndex = 0; + if (itsSourceFileNameIndex != 0) { + sourceFileAttributeNameIndex = itsConstantPool.addUtf8( + "SourceFile"); + } + + offset = putInt64(FileHeaderConstant, data, offset); + offset = itsConstantPool.write(data, offset); + offset = putInt16(itsFlags, data, offset); + offset = putInt16(itsThisClassIndex, data, offset); + offset = putInt16(itsSuperClassIndex, data, offset); + offset = putInt16(itsInterfaces.size(), data, offset); + for (int i = 0; i < itsInterfaces.size(); i++) { + int interfaceIndex = ((Short)(itsInterfaces.get(i))).shortValue(); + offset = putInt16(interfaceIndex, data, offset); + } + offset = putInt16(itsFields.size(), data, offset); + for (int i = 0; i < itsFields.size(); i++) { + ClassFileField field = (ClassFileField)itsFields.get(i); + offset = field.write(data, offset); + } + offset = putInt16(itsMethods.size(), data, offset); + for (int i = 0; i < itsMethods.size(); i++) { + ClassFileMethod method = (ClassFileMethod)itsMethods.get(i); + offset = method.write(data, offset); + } + if (itsSourceFileNameIndex != 0) { + offset = putInt16(1, data, offset); // attributes count + offset = putInt16(sourceFileAttributeNameIndex, data, offset); + offset = putInt32(2, data, offset); + offset = putInt16(itsSourceFileNameIndex, data, offset); + } else { + offset = putInt16(0, data, offset); // no attributes + } + + if (offset != dataSize) { + // Check getWriteSize is consistent with write! + throw new RuntimeException(); + } + + return data; + } + + static int putInt64(long value, byte[] array, int offset) + { + offset = putInt32((int)(value >>> 32), array, offset); + return putInt32((int)value, array, offset); + } + + private static void badStack(int value) + { + String s; + if (value < 0) { s = "Stack underflow: "+value; } + else { s = "Too big stack: "+value; } + throw new IllegalStateException(s); + } + + /* + Really weird. Returns an int with # parameters in hi 16 bits, and + stack difference removal of parameters from stack and pushing the + result (it does not take into account removal of this in case of + non-static methods). + If Java really supported references we wouldn't have to be this + perverted. + */ + private static int sizeOfParameters(String pString) + { + int length = pString.length(); + int rightParenthesis = pString.lastIndexOf(')'); + if (3 <= length /* minimal signature takes at least 3 chars: ()V */ + && pString.charAt(0) == '(' + && 1 <= rightParenthesis && rightParenthesis + 1 < length) + { + boolean ok = true; + int index = 1; + int stackDiff = 0; + int count = 0; + stringLoop: + while (index != rightParenthesis) { + switch (pString.charAt(index)) { + default: + ok = false; + break stringLoop; + case 'J' : + case 'D' : + --stackDiff; + // fall thru + case 'B' : + case 'S' : + case 'C' : + case 'I' : + case 'Z' : + case 'F' : + --stackDiff; + ++count; + ++index; + continue; + case '[' : + ++index; + int c = pString.charAt(index); + while (c == '[') { + ++index; + c = pString.charAt(index); + } + switch (c) { + default: + ok = false; + break stringLoop; + case 'J' : + case 'D' : + case 'B' : + case 'S' : + case 'C' : + case 'I' : + case 'Z' : + case 'F' : + --stackDiff; + ++count; + ++index; + continue; + case 'L': + // fall thru + } + // fall thru + case 'L' : { + --stackDiff; + ++count; + ++index; + int semicolon = pString.indexOf(';', index); + if (!(index + 1 <= semicolon + && semicolon < rightParenthesis)) + { + ok = false; + break stringLoop; + } + index = semicolon + 1; + continue; + } + } + } + if (ok) { + switch (pString.charAt(rightParenthesis + 1)) { + default: + ok = false; + break; + case 'J' : + case 'D' : + ++stackDiff; + // fall thru + case 'B' : + case 'S' : + case 'C' : + case 'I' : + case 'Z' : + case 'F' : + case 'L' : + case '[' : + ++stackDiff; + // fall thru + case 'V' : + break; + } + if (ok) { + return ((count << 16) | (0xFFFF & stackDiff)); + } + } + } + throw new IllegalArgumentException( + "Bad parameter signature: "+pString); + } + + static int putInt16(int value, byte[] array, int offset) + { + array[offset + 0] = (byte)(value >>> 8); + array[offset + 1] = (byte)value; + return offset + 2; + } + + static int putInt32(int value, byte[] array, int offset) + { + array[offset + 0] = (byte)(value >>> 24); + array[offset + 1] = (byte)(value >>> 16); + array[offset + 2] = (byte)(value >>> 8); + array[offset + 3] = (byte)value; + return offset + 4; + } + + /** + * Number of operands accompanying the opcode. + */ + static int opcodeCount(int opcode) + { + switch (opcode) { + case ByteCode.AALOAD: + case ByteCode.AASTORE: + case ByteCode.ACONST_NULL: + case ByteCode.ALOAD_0: + case ByteCode.ALOAD_1: + case ByteCode.ALOAD_2: + case ByteCode.ALOAD_3: + case ByteCode.ARETURN: + case ByteCode.ARRAYLENGTH: + case ByteCode.ASTORE_0: + case ByteCode.ASTORE_1: + case ByteCode.ASTORE_2: + case ByteCode.ASTORE_3: + case ByteCode.ATHROW: + case ByteCode.BALOAD: + case ByteCode.BASTORE: + case ByteCode.BREAKPOINT: + case ByteCode.CALOAD: + case ByteCode.CASTORE: + case ByteCode.D2F: + case ByteCode.D2I: + case ByteCode.D2L: + case ByteCode.DADD: + case ByteCode.DALOAD: + case ByteCode.DASTORE: + case ByteCode.DCMPG: + case ByteCode.DCMPL: + case ByteCode.DCONST_0: + case ByteCode.DCONST_1: + case ByteCode.DDIV: + case ByteCode.DLOAD_0: + case ByteCode.DLOAD_1: + case ByteCode.DLOAD_2: + case ByteCode.DLOAD_3: + case ByteCode.DMUL: + case ByteCode.DNEG: + case ByteCode.DREM: + case ByteCode.DRETURN: + case ByteCode.DSTORE_0: + case ByteCode.DSTORE_1: + case ByteCode.DSTORE_2: + case ByteCode.DSTORE_3: + case ByteCode.DSUB: + case ByteCode.DUP: + case ByteCode.DUP2: + case ByteCode.DUP2_X1: + case ByteCode.DUP2_X2: + case ByteCode.DUP_X1: + case ByteCode.DUP_X2: + case ByteCode.F2D: + case ByteCode.F2I: + case ByteCode.F2L: + case ByteCode.FADD: + case ByteCode.FALOAD: + case ByteCode.FASTORE: + case ByteCode.FCMPG: + case ByteCode.FCMPL: + case ByteCode.FCONST_0: + case ByteCode.FCONST_1: + case ByteCode.FCONST_2: + case ByteCode.FDIV: + case ByteCode.FLOAD_0: + case ByteCode.FLOAD_1: + case ByteCode.FLOAD_2: + case ByteCode.FLOAD_3: + case ByteCode.FMUL: + case ByteCode.FNEG: + case ByteCode.FREM: + case ByteCode.FRETURN: + case ByteCode.FSTORE_0: + case ByteCode.FSTORE_1: + case ByteCode.FSTORE_2: + case ByteCode.FSTORE_3: + case ByteCode.FSUB: + case ByteCode.I2B: + case ByteCode.I2C: + case ByteCode.I2D: + case ByteCode.I2F: + case ByteCode.I2L: + case ByteCode.I2S: + case ByteCode.IADD: + case ByteCode.IALOAD: + case ByteCode.IAND: + case ByteCode.IASTORE: + case ByteCode.ICONST_0: + case ByteCode.ICONST_1: + case ByteCode.ICONST_2: + case ByteCode.ICONST_3: + case ByteCode.ICONST_4: + case ByteCode.ICONST_5: + case ByteCode.ICONST_M1: + case ByteCode.IDIV: + case ByteCode.ILOAD_0: + case ByteCode.ILOAD_1: + case ByteCode.ILOAD_2: + case ByteCode.ILOAD_3: + case ByteCode.IMPDEP1: + case ByteCode.IMPDEP2: + case ByteCode.IMUL: + case ByteCode.INEG: + case ByteCode.IOR: + case ByteCode.IREM: + case ByteCode.IRETURN: + case ByteCode.ISHL: + case ByteCode.ISHR: + case ByteCode.ISTORE_0: + case ByteCode.ISTORE_1: + case ByteCode.ISTORE_2: + case ByteCode.ISTORE_3: + case ByteCode.ISUB: + case ByteCode.IUSHR: + case ByteCode.IXOR: + case ByteCode.L2D: + case ByteCode.L2F: + case ByteCode.L2I: + case ByteCode.LADD: + case ByteCode.LALOAD: + case ByteCode.LAND: + case ByteCode.LASTORE: + case ByteCode.LCMP: + case ByteCode.LCONST_0: + case ByteCode.LCONST_1: + case ByteCode.LDIV: + case ByteCode.LLOAD_0: + case ByteCode.LLOAD_1: + case ByteCode.LLOAD_2: + case ByteCode.LLOAD_3: + case ByteCode.LMUL: + case ByteCode.LNEG: + case ByteCode.LOR: + case ByteCode.LREM: + case ByteCode.LRETURN: + case ByteCode.LSHL: + case ByteCode.LSHR: + case ByteCode.LSTORE_0: + case ByteCode.LSTORE_1: + case ByteCode.LSTORE_2: + case ByteCode.LSTORE_3: + case ByteCode.LSUB: + case ByteCode.LUSHR: + case ByteCode.LXOR: + case ByteCode.MONITORENTER: + case ByteCode.MONITOREXIT: + case ByteCode.NOP: + case ByteCode.POP: + case ByteCode.POP2: + case ByteCode.RETURN: + case ByteCode.SALOAD: + case ByteCode.SASTORE: + case ByteCode.SWAP: + case ByteCode.WIDE: + return 0; + case ByteCode.ALOAD: + case ByteCode.ANEWARRAY: + case ByteCode.ASTORE: + case ByteCode.BIPUSH: + case ByteCode.CHECKCAST: + case ByteCode.DLOAD: + case ByteCode.DSTORE: + case ByteCode.FLOAD: + case ByteCode.FSTORE: + case ByteCode.GETFIELD: + case ByteCode.GETSTATIC: + case ByteCode.GOTO: + case ByteCode.GOTO_W: + case ByteCode.IFEQ: + case ByteCode.IFGE: + case ByteCode.IFGT: + case ByteCode.IFLE: + case ByteCode.IFLT: + case ByteCode.IFNE: + case ByteCode.IFNONNULL: + case ByteCode.IFNULL: + case ByteCode.IF_ACMPEQ: + case ByteCode.IF_ACMPNE: + case ByteCode.IF_ICMPEQ: + case ByteCode.IF_ICMPGE: + case ByteCode.IF_ICMPGT: + case ByteCode.IF_ICMPLE: + case ByteCode.IF_ICMPLT: + case ByteCode.IF_ICMPNE: + case ByteCode.ILOAD: + case ByteCode.INSTANCEOF: + case ByteCode.INVOKEINTERFACE: + case ByteCode.INVOKESPECIAL: + case ByteCode.INVOKESTATIC: + case ByteCode.INVOKEVIRTUAL: + case ByteCode.ISTORE: + case ByteCode.JSR: + case ByteCode.JSR_W: + case ByteCode.LDC: + case ByteCode.LDC2_W: + case ByteCode.LDC_W: + case ByteCode.LLOAD: + case ByteCode.LSTORE: + case ByteCode.NEW: + case ByteCode.NEWARRAY: + case ByteCode.PUTFIELD: + case ByteCode.PUTSTATIC: + case ByteCode.RET: + case ByteCode.SIPUSH: + return 1; + + case ByteCode.IINC: + case ByteCode.MULTIANEWARRAY: + return 2; + + case ByteCode.LOOKUPSWITCH: + case ByteCode.TABLESWITCH: + return -1; + } + throw new IllegalArgumentException("Bad opcode: "+opcode); + } + + /** + * The effect on the operand stack of a given opcode. + */ + static int stackChange(int opcode) + { + // For INVOKE... accounts only for popping this (unless static), + // ignoring parameters and return type + switch (opcode) { + case ByteCode.DASTORE: + case ByteCode.LASTORE: + return -4; + + case ByteCode.AASTORE: + case ByteCode.BASTORE: + case ByteCode.CASTORE: + case ByteCode.DCMPG: + case ByteCode.DCMPL: + case ByteCode.FASTORE: + case ByteCode.IASTORE: + case ByteCode.LCMP: + case ByteCode.SASTORE: + return -3; + + case ByteCode.DADD: + case ByteCode.DDIV: + case ByteCode.DMUL: + case ByteCode.DREM: + case ByteCode.DRETURN: + case ByteCode.DSTORE: + case ByteCode.DSTORE_0: + case ByteCode.DSTORE_1: + case ByteCode.DSTORE_2: + case ByteCode.DSTORE_3: + case ByteCode.DSUB: + case ByteCode.IF_ACMPEQ: + case ByteCode.IF_ACMPNE: + case ByteCode.IF_ICMPEQ: + case ByteCode.IF_ICMPGE: + case ByteCode.IF_ICMPGT: + case ByteCode.IF_ICMPLE: + case ByteCode.IF_ICMPLT: + case ByteCode.IF_ICMPNE: + case ByteCode.LADD: + case ByteCode.LAND: + case ByteCode.LDIV: + case ByteCode.LMUL: + case ByteCode.LOR: + case ByteCode.LREM: + case ByteCode.LRETURN: + case ByteCode.LSTORE: + case ByteCode.LSTORE_0: + case ByteCode.LSTORE_1: + case ByteCode.LSTORE_2: + case ByteCode.LSTORE_3: + case ByteCode.LSUB: + case ByteCode.LXOR: + case ByteCode.POP2: + return -2; + + case ByteCode.AALOAD: + case ByteCode.ARETURN: + case ByteCode.ASTORE: + case ByteCode.ASTORE_0: + case ByteCode.ASTORE_1: + case ByteCode.ASTORE_2: + case ByteCode.ASTORE_3: + case ByteCode.ATHROW: + case ByteCode.BALOAD: + case ByteCode.CALOAD: + case ByteCode.D2F: + case ByteCode.D2I: + case ByteCode.FADD: + case ByteCode.FALOAD: + case ByteCode.FCMPG: + case ByteCode.FCMPL: + case ByteCode.FDIV: + case ByteCode.FMUL: + case ByteCode.FREM: + case ByteCode.FRETURN: + case ByteCode.FSTORE: + case ByteCode.FSTORE_0: + case ByteCode.FSTORE_1: + case ByteCode.FSTORE_2: + case ByteCode.FSTORE_3: + case ByteCode.FSUB: + case ByteCode.GETFIELD: + case ByteCode.IADD: + case ByteCode.IALOAD: + case ByteCode.IAND: + case ByteCode.IDIV: + case ByteCode.IFEQ: + case ByteCode.IFGE: + case ByteCode.IFGT: + case ByteCode.IFLE: + case ByteCode.IFLT: + case ByteCode.IFNE: + case ByteCode.IFNONNULL: + case ByteCode.IFNULL: + case ByteCode.IMUL: + case ByteCode.INVOKEINTERFACE: // + case ByteCode.INVOKESPECIAL: // but needs to account for + case ByteCode.INVOKEVIRTUAL: // pops 'this' (unless static) + case ByteCode.IOR: + case ByteCode.IREM: + case ByteCode.IRETURN: + case ByteCode.ISHL: + case ByteCode.ISHR: + case ByteCode.ISTORE: + case ByteCode.ISTORE_0: + case ByteCode.ISTORE_1: + case ByteCode.ISTORE_2: + case ByteCode.ISTORE_3: + case ByteCode.ISUB: + case ByteCode.IUSHR: + case ByteCode.IXOR: + case ByteCode.L2F: + case ByteCode.L2I: + case ByteCode.LOOKUPSWITCH: + case ByteCode.LSHL: + case ByteCode.LSHR: + case ByteCode.LUSHR: + case ByteCode.MONITORENTER: + case ByteCode.MONITOREXIT: + case ByteCode.POP: + case ByteCode.PUTFIELD: + case ByteCode.SALOAD: + case ByteCode.TABLESWITCH: + return -1; + + case ByteCode.ANEWARRAY: + case ByteCode.ARRAYLENGTH: + case ByteCode.BREAKPOINT: + case ByteCode.CHECKCAST: + case ByteCode.D2L: + case ByteCode.DALOAD: + case ByteCode.DNEG: + case ByteCode.F2I: + case ByteCode.FNEG: + case ByteCode.GETSTATIC: + case ByteCode.GOTO: + case ByteCode.GOTO_W: + case ByteCode.I2B: + case ByteCode.I2C: + case ByteCode.I2F: + case ByteCode.I2S: + case ByteCode.IINC: + case ByteCode.IMPDEP1: + case ByteCode.IMPDEP2: + case ByteCode.INEG: + case ByteCode.INSTANCEOF: + case ByteCode.INVOKESTATIC: + case ByteCode.L2D: + case ByteCode.LALOAD: + case ByteCode.LNEG: + case ByteCode.NEWARRAY: + case ByteCode.NOP: + case ByteCode.PUTSTATIC: + case ByteCode.RET: + case ByteCode.RETURN: + case ByteCode.SWAP: + case ByteCode.WIDE: + return 0; + + case ByteCode.ACONST_NULL: + case ByteCode.ALOAD: + case ByteCode.ALOAD_0: + case ByteCode.ALOAD_1: + case ByteCode.ALOAD_2: + case ByteCode.ALOAD_3: + case ByteCode.BIPUSH: + case ByteCode.DUP: + case ByteCode.DUP_X1: + case ByteCode.DUP_X2: + case ByteCode.F2D: + case ByteCode.F2L: + case ByteCode.FCONST_0: + case ByteCode.FCONST_1: + case ByteCode.FCONST_2: + case ByteCode.FLOAD: + case ByteCode.FLOAD_0: + case ByteCode.FLOAD_1: + case ByteCode.FLOAD_2: + case ByteCode.FLOAD_3: + case ByteCode.I2D: + case ByteCode.I2L: + case ByteCode.ICONST_0: + case ByteCode.ICONST_1: + case ByteCode.ICONST_2: + case ByteCode.ICONST_3: + case ByteCode.ICONST_4: + case ByteCode.ICONST_5: + case ByteCode.ICONST_M1: + case ByteCode.ILOAD: + case ByteCode.ILOAD_0: + case ByteCode.ILOAD_1: + case ByteCode.ILOAD_2: + case ByteCode.ILOAD_3: + case ByteCode.JSR: + case ByteCode.JSR_W: + case ByteCode.LDC: + case ByteCode.LDC_W: + case ByteCode.MULTIANEWARRAY: + case ByteCode.NEW: + case ByteCode.SIPUSH: + return 1; + + case ByteCode.DCONST_0: + case ByteCode.DCONST_1: + case ByteCode.DLOAD: + case ByteCode.DLOAD_0: + case ByteCode.DLOAD_1: + case ByteCode.DLOAD_2: + case ByteCode.DLOAD_3: + case ByteCode.DUP2: + case ByteCode.DUP2_X1: + case ByteCode.DUP2_X2: + case ByteCode.LCONST_0: + case ByteCode.LCONST_1: + case ByteCode.LDC2_W: + case ByteCode.LLOAD: + case ByteCode.LLOAD_0: + case ByteCode.LLOAD_1: + case ByteCode.LLOAD_2: + case ByteCode.LLOAD_3: + return 2; + } + throw new IllegalArgumentException("Bad opcode: "+opcode); + } + + /* + * Number of bytes of operands generated after the opcode. + * Not in use currently. + */ +/* + int extra(int opcode) + { + switch (opcode) { + case ByteCode.AALOAD: + case ByteCode.AASTORE: + case ByteCode.ACONST_NULL: + case ByteCode.ALOAD_0: + case ByteCode.ALOAD_1: + case ByteCode.ALOAD_2: + case ByteCode.ALOAD_3: + case ByteCode.ARETURN: + case ByteCode.ARRAYLENGTH: + case ByteCode.ASTORE_0: + case ByteCode.ASTORE_1: + case ByteCode.ASTORE_2: + case ByteCode.ASTORE_3: + case ByteCode.ATHROW: + case ByteCode.BALOAD: + case ByteCode.BASTORE: + case ByteCode.BREAKPOINT: + case ByteCode.CALOAD: + case ByteCode.CASTORE: + case ByteCode.D2F: + case ByteCode.D2I: + case ByteCode.D2L: + case ByteCode.DADD: + case ByteCode.DALOAD: + case ByteCode.DASTORE: + case ByteCode.DCMPG: + case ByteCode.DCMPL: + case ByteCode.DCONST_0: + case ByteCode.DCONST_1: + case ByteCode.DDIV: + case ByteCode.DLOAD_0: + case ByteCode.DLOAD_1: + case ByteCode.DLOAD_2: + case ByteCode.DLOAD_3: + case ByteCode.DMUL: + case ByteCode.DNEG: + case ByteCode.DREM: + case ByteCode.DRETURN: + case ByteCode.DSTORE_0: + case ByteCode.DSTORE_1: + case ByteCode.DSTORE_2: + case ByteCode.DSTORE_3: + case ByteCode.DSUB: + case ByteCode.DUP2: + case ByteCode.DUP2_X1: + case ByteCode.DUP2_X2: + case ByteCode.DUP: + case ByteCode.DUP_X1: + case ByteCode.DUP_X2: + case ByteCode.F2D: + case ByteCode.F2I: + case ByteCode.F2L: + case ByteCode.FADD: + case ByteCode.FALOAD: + case ByteCode.FASTORE: + case ByteCode.FCMPG: + case ByteCode.FCMPL: + case ByteCode.FCONST_0: + case ByteCode.FCONST_1: + case ByteCode.FCONST_2: + case ByteCode.FDIV: + case ByteCode.FLOAD_0: + case ByteCode.FLOAD_1: + case ByteCode.FLOAD_2: + case ByteCode.FLOAD_3: + case ByteCode.FMUL: + case ByteCode.FNEG: + case ByteCode.FREM: + case ByteCode.FRETURN: + case ByteCode.FSTORE_0: + case ByteCode.FSTORE_1: + case ByteCode.FSTORE_2: + case ByteCode.FSTORE_3: + case ByteCode.FSUB: + case ByteCode.I2B: + case ByteCode.I2C: + case ByteCode.I2D: + case ByteCode.I2F: + case ByteCode.I2L: + case ByteCode.I2S: + case ByteCode.IADD: + case ByteCode.IALOAD: + case ByteCode.IAND: + case ByteCode.IASTORE: + case ByteCode.ICONST_0: + case ByteCode.ICONST_1: + case ByteCode.ICONST_2: + case ByteCode.ICONST_3: + case ByteCode.ICONST_4: + case ByteCode.ICONST_5: + case ByteCode.ICONST_M1: + case ByteCode.IDIV: + case ByteCode.ILOAD_0: + case ByteCode.ILOAD_1: + case ByteCode.ILOAD_2: + case ByteCode.ILOAD_3: + case ByteCode.IMPDEP1: + case ByteCode.IMPDEP2: + case ByteCode.IMUL: + case ByteCode.INEG: + case ByteCode.IOR: + case ByteCode.IREM: + case ByteCode.IRETURN: + case ByteCode.ISHL: + case ByteCode.ISHR: + case ByteCode.ISTORE_0: + case ByteCode.ISTORE_1: + case ByteCode.ISTORE_2: + case ByteCode.ISTORE_3: + case ByteCode.ISUB: + case ByteCode.IUSHR: + case ByteCode.IXOR: + case ByteCode.L2D: + case ByteCode.L2F: + case ByteCode.L2I: + case ByteCode.LADD: + case ByteCode.LALOAD: + case ByteCode.LAND: + case ByteCode.LASTORE: + case ByteCode.LCMP: + case ByteCode.LCONST_0: + case ByteCode.LCONST_1: + case ByteCode.LDIV: + case ByteCode.LLOAD_0: + case ByteCode.LLOAD_1: + case ByteCode.LLOAD_2: + case ByteCode.LLOAD_3: + case ByteCode.LMUL: + case ByteCode.LNEG: + case ByteCode.LOR: + case ByteCode.LREM: + case ByteCode.LRETURN: + case ByteCode.LSHL: + case ByteCode.LSHR: + case ByteCode.LSTORE_0: + case ByteCode.LSTORE_1: + case ByteCode.LSTORE_2: + case ByteCode.LSTORE_3: + case ByteCode.LSUB: + case ByteCode.LUSHR: + case ByteCode.LXOR: + case ByteCode.MONITORENTER: + case ByteCode.MONITOREXIT: + case ByteCode.NOP: + case ByteCode.POP2: + case ByteCode.POP: + case ByteCode.RETURN: + case ByteCode.SALOAD: + case ByteCode.SASTORE: + case ByteCode.SWAP: + case ByteCode.WIDE: + return 0; + + case ByteCode.ALOAD: + case ByteCode.ASTORE: + case ByteCode.BIPUSH: + case ByteCode.DLOAD: + case ByteCode.DSTORE: + case ByteCode.FLOAD: + case ByteCode.FSTORE: + case ByteCode.ILOAD: + case ByteCode.ISTORE: + case ByteCode.LDC: + case ByteCode.LLOAD: + case ByteCode.LSTORE: + case ByteCode.NEWARRAY: + case ByteCode.RET: + return 1; + + case ByteCode.ANEWARRAY: + case ByteCode.CHECKCAST: + case ByteCode.GETFIELD: + case ByteCode.GETSTATIC: + case ByteCode.GOTO: + case ByteCode.IFEQ: + case ByteCode.IFGE: + case ByteCode.IFGT: + case ByteCode.IFLE: + case ByteCode.IFLT: + case ByteCode.IFNE: + case ByteCode.IFNONNULL: + case ByteCode.IFNULL: + case ByteCode.IF_ACMPEQ: + case ByteCode.IF_ACMPNE: + case ByteCode.IF_ICMPEQ: + case ByteCode.IF_ICMPGE: + case ByteCode.IF_ICMPGT: + case ByteCode.IF_ICMPLE: + case ByteCode.IF_ICMPLT: + case ByteCode.IF_ICMPNE: + case ByteCode.IINC: + case ByteCode.INSTANCEOF: + case ByteCode.INVOKEINTERFACE: + case ByteCode.INVOKESPECIAL: + case ByteCode.INVOKESTATIC: + case ByteCode.INVOKEVIRTUAL: + case ByteCode.JSR: + case ByteCode.LDC2_W: + case ByteCode.LDC_W: + case ByteCode.NEW: + case ByteCode.PUTFIELD: + case ByteCode.PUTSTATIC: + case ByteCode.SIPUSH: + return 2; + + case ByteCode.MULTIANEWARRAY: + return 3; + + case ByteCode.GOTO_W: + case ByteCode.JSR_W: + return 4; + + case ByteCode.LOOKUPSWITCH: // depends on alignment + case ByteCode.TABLESWITCH: // depends on alignment + return -1; + } + throw new IllegalArgumentException("Bad opcode: "+opcode); + } +*/ + private static String bytecodeStr(int code) + { + if (DEBUGSTACK || DEBUGCODE) { + switch (code) { + case ByteCode.NOP: return "nop"; + case ByteCode.ACONST_NULL: return "aconst_null"; + case ByteCode.ICONST_M1: return "iconst_m1"; + case ByteCode.ICONST_0: return "iconst_0"; + case ByteCode.ICONST_1: return "iconst_1"; + case ByteCode.ICONST_2: return "iconst_2"; + case ByteCode.ICONST_3: return "iconst_3"; + case ByteCode.ICONST_4: return "iconst_4"; + case ByteCode.ICONST_5: return "iconst_5"; + case ByteCode.LCONST_0: return "lconst_0"; + case ByteCode.LCONST_1: return "lconst_1"; + case ByteCode.FCONST_0: return "fconst_0"; + case ByteCode.FCONST_1: return "fconst_1"; + case ByteCode.FCONST_2: return "fconst_2"; + case ByteCode.DCONST_0: return "dconst_0"; + case ByteCode.DCONST_1: return "dconst_1"; + case ByteCode.BIPUSH: return "bipush"; + case ByteCode.SIPUSH: return "sipush"; + case ByteCode.LDC: return "ldc"; + case ByteCode.LDC_W: return "ldc_w"; + case ByteCode.LDC2_W: return "ldc2_w"; + case ByteCode.ILOAD: return "iload"; + case ByteCode.LLOAD: return "lload"; + case ByteCode.FLOAD: return "fload"; + case ByteCode.DLOAD: return "dload"; + case ByteCode.ALOAD: return "aload"; + case ByteCode.ILOAD_0: return "iload_0"; + case ByteCode.ILOAD_1: return "iload_1"; + case ByteCode.ILOAD_2: return "iload_2"; + case ByteCode.ILOAD_3: return "iload_3"; + case ByteCode.LLOAD_0: return "lload_0"; + case ByteCode.LLOAD_1: return "lload_1"; + case ByteCode.LLOAD_2: return "lload_2"; + case ByteCode.LLOAD_3: return "lload_3"; + case ByteCode.FLOAD_0: return "fload_0"; + case ByteCode.FLOAD_1: return "fload_1"; + case ByteCode.FLOAD_2: return "fload_2"; + case ByteCode.FLOAD_3: return "fload_3"; + case ByteCode.DLOAD_0: return "dload_0"; + case ByteCode.DLOAD_1: return "dload_1"; + case ByteCode.DLOAD_2: return "dload_2"; + case ByteCode.DLOAD_3: return "dload_3"; + case ByteCode.ALOAD_0: return "aload_0"; + case ByteCode.ALOAD_1: return "aload_1"; + case ByteCode.ALOAD_2: return "aload_2"; + case ByteCode.ALOAD_3: return "aload_3"; + case ByteCode.IALOAD: return "iaload"; + case ByteCode.LALOAD: return "laload"; + case ByteCode.FALOAD: return "faload"; + case ByteCode.DALOAD: return "daload"; + case ByteCode.AALOAD: return "aaload"; + case ByteCode.BALOAD: return "baload"; + case ByteCode.CALOAD: return "caload"; + case ByteCode.SALOAD: return "saload"; + case ByteCode.ISTORE: return "istore"; + case ByteCode.LSTORE: return "lstore"; + case ByteCode.FSTORE: return "fstore"; + case ByteCode.DSTORE: return "dstore"; + case ByteCode.ASTORE: return "astore"; + case ByteCode.ISTORE_0: return "istore_0"; + case ByteCode.ISTORE_1: return "istore_1"; + case ByteCode.ISTORE_2: return "istore_2"; + case ByteCode.ISTORE_3: return "istore_3"; + case ByteCode.LSTORE_0: return "lstore_0"; + case ByteCode.LSTORE_1: return "lstore_1"; + case ByteCode.LSTORE_2: return "lstore_2"; + case ByteCode.LSTORE_3: return "lstore_3"; + case ByteCode.FSTORE_0: return "fstore_0"; + case ByteCode.FSTORE_1: return "fstore_1"; + case ByteCode.FSTORE_2: return "fstore_2"; + case ByteCode.FSTORE_3: return "fstore_3"; + case ByteCode.DSTORE_0: return "dstore_0"; + case ByteCode.DSTORE_1: return "dstore_1"; + case ByteCode.DSTORE_2: return "dstore_2"; + case ByteCode.DSTORE_3: return "dstore_3"; + case ByteCode.ASTORE_0: return "astore_0"; + case ByteCode.ASTORE_1: return "astore_1"; + case ByteCode.ASTORE_2: return "astore_2"; + case ByteCode.ASTORE_3: return "astore_3"; + case ByteCode.IASTORE: return "iastore"; + case ByteCode.LASTORE: return "lastore"; + case ByteCode.FASTORE: return "fastore"; + case ByteCode.DASTORE: return "dastore"; + case ByteCode.AASTORE: return "aastore"; + case ByteCode.BASTORE: return "bastore"; + case ByteCode.CASTORE: return "castore"; + case ByteCode.SASTORE: return "sastore"; + case ByteCode.POP: return "pop"; + case ByteCode.POP2: return "pop2"; + case ByteCode.DUP: return "dup"; + case ByteCode.DUP_X1: return "dup_x1"; + case ByteCode.DUP_X2: return "dup_x2"; + case ByteCode.DUP2: return "dup2"; + case ByteCode.DUP2_X1: return "dup2_x1"; + case ByteCode.DUP2_X2: return "dup2_x2"; + case ByteCode.SWAP: return "swap"; + case ByteCode.IADD: return "iadd"; + case ByteCode.LADD: return "ladd"; + case ByteCode.FADD: return "fadd"; + case ByteCode.DADD: return "dadd"; + case ByteCode.ISUB: return "isub"; + case ByteCode.LSUB: return "lsub"; + case ByteCode.FSUB: return "fsub"; + case ByteCode.DSUB: return "dsub"; + case ByteCode.IMUL: return "imul"; + case ByteCode.LMUL: return "lmul"; + case ByteCode.FMUL: return "fmul"; + case ByteCode.DMUL: return "dmul"; + case ByteCode.IDIV: return "idiv"; + case ByteCode.LDIV: return "ldiv"; + case ByteCode.FDIV: return "fdiv"; + case ByteCode.DDIV: return "ddiv"; + case ByteCode.IREM: return "irem"; + case ByteCode.LREM: return "lrem"; + case ByteCode.FREM: return "frem"; + case ByteCode.DREM: return "drem"; + case ByteCode.INEG: return "ineg"; + case ByteCode.LNEG: return "lneg"; + case ByteCode.FNEG: return "fneg"; + case ByteCode.DNEG: return "dneg"; + case ByteCode.ISHL: return "ishl"; + case ByteCode.LSHL: return "lshl"; + case ByteCode.ISHR: return "ishr"; + case ByteCode.LSHR: return "lshr"; + case ByteCode.IUSHR: return "iushr"; + case ByteCode.LUSHR: return "lushr"; + case ByteCode.IAND: return "iand"; + case ByteCode.LAND: return "land"; + case ByteCode.IOR: return "ior"; + case ByteCode.LOR: return "lor"; + case ByteCode.IXOR: return "ixor"; + case ByteCode.LXOR: return "lxor"; + case ByteCode.IINC: return "iinc"; + case ByteCode.I2L: return "i2l"; + case ByteCode.I2F: return "i2f"; + case ByteCode.I2D: return "i2d"; + case ByteCode.L2I: return "l2i"; + case ByteCode.L2F: return "l2f"; + case ByteCode.L2D: return "l2d"; + case ByteCode.F2I: return "f2i"; + case ByteCode.F2L: return "f2l"; + case ByteCode.F2D: return "f2d"; + case ByteCode.D2I: return "d2i"; + case ByteCode.D2L: return "d2l"; + case ByteCode.D2F: return "d2f"; + case ByteCode.I2B: return "i2b"; + case ByteCode.I2C: return "i2c"; + case ByteCode.I2S: return "i2s"; + case ByteCode.LCMP: return "lcmp"; + case ByteCode.FCMPL: return "fcmpl"; + case ByteCode.FCMPG: return "fcmpg"; + case ByteCode.DCMPL: return "dcmpl"; + case ByteCode.DCMPG: return "dcmpg"; + case ByteCode.IFEQ: return "ifeq"; + case ByteCode.IFNE: return "ifne"; + case ByteCode.IFLT: return "iflt"; + case ByteCode.IFGE: return "ifge"; + case ByteCode.IFGT: return "ifgt"; + case ByteCode.IFLE: return "ifle"; + case ByteCode.IF_ICMPEQ: return "if_icmpeq"; + case ByteCode.IF_ICMPNE: return "if_icmpne"; + case ByteCode.IF_ICMPLT: return "if_icmplt"; + case ByteCode.IF_ICMPGE: return "if_icmpge"; + case ByteCode.IF_ICMPGT: return "if_icmpgt"; + case ByteCode.IF_ICMPLE: return "if_icmple"; + case ByteCode.IF_ACMPEQ: return "if_acmpeq"; + case ByteCode.IF_ACMPNE: return "if_acmpne"; + case ByteCode.GOTO: return "goto"; + case ByteCode.JSR: return "jsr"; + case ByteCode.RET: return "ret"; + case ByteCode.TABLESWITCH: return "tableswitch"; + case ByteCode.LOOKUPSWITCH: return "lookupswitch"; + case ByteCode.IRETURN: return "ireturn"; + case ByteCode.LRETURN: return "lreturn"; + case ByteCode.FRETURN: return "freturn"; + case ByteCode.DRETURN: return "dreturn"; + case ByteCode.ARETURN: return "areturn"; + case ByteCode.RETURN: return "return"; + case ByteCode.GETSTATIC: return "getstatic"; + case ByteCode.PUTSTATIC: return "putstatic"; + case ByteCode.GETFIELD: return "getfield"; + case ByteCode.PUTFIELD: return "putfield"; + case ByteCode.INVOKEVIRTUAL: return "invokevirtual"; + case ByteCode.INVOKESPECIAL: return "invokespecial"; + case ByteCode.INVOKESTATIC: return "invokestatic"; + case ByteCode.INVOKEINTERFACE: return "invokeinterface"; + case ByteCode.NEW: return "new"; + case ByteCode.NEWARRAY: return "newarray"; + case ByteCode.ANEWARRAY: return "anewarray"; + case ByteCode.ARRAYLENGTH: return "arraylength"; + case ByteCode.ATHROW: return "athrow"; + case ByteCode.CHECKCAST: return "checkcast"; + case ByteCode.INSTANCEOF: return "instanceof"; + case ByteCode.MONITORENTER: return "monitorenter"; + case ByteCode.MONITOREXIT: return "monitorexit"; + case ByteCode.WIDE: return "wide"; + case ByteCode.MULTIANEWARRAY: return "multianewarray"; + case ByteCode.IFNULL: return "ifnull"; + case ByteCode.IFNONNULL: return "ifnonnull"; + case ByteCode.GOTO_W: return "goto_w"; + case ByteCode.JSR_W: return "jsr_w"; + case ByteCode.BREAKPOINT: return "breakpoint"; + + case ByteCode.IMPDEP1: return "impdep1"; + case ByteCode.IMPDEP2: return "impdep2"; + } + } + return ""; + } + + final char[] getCharBuffer(int minimalSize) + { + if (minimalSize > tmpCharBuffer.length) { + int newSize = tmpCharBuffer.length * 2; + if (minimalSize > newSize) { newSize = minimalSize; } + tmpCharBuffer = new char[newSize]; + } + return tmpCharBuffer; + } + + private static final int LineNumberTableSize = 16; + private static final int ExceptionTableSize = 4; + + private final static long FileHeaderConstant = 0xCAFEBABE0003002DL; + // Set DEBUG flags to true to get better checking and progress info. + private static final boolean DEBUGSTACK = false; + private static final boolean DEBUGLABELS = false; + private static final boolean DEBUGCODE = false; + + private String generatedClassName; + + private ExceptionTableEntry itsExceptionTable[]; + private int itsExceptionTableTop; + + private int itsLineNumberTable[]; // pack start_pc & line_number together + private int itsLineNumberTableTop; + + private byte[] itsCodeBuffer = new byte[256]; + private int itsCodeBufferTop; + + private ConstantPool itsConstantPool; + + private ClassFileMethod itsCurrentMethod; + private short itsStackTop; + + private short itsMaxStack; + private short itsMaxLocals; + + private ObjArray itsMethods = new ObjArray(); + private ObjArray itsFields = new ObjArray(); + private ObjArray itsInterfaces = new ObjArray(); + + private short itsFlags; + private short itsThisClassIndex; + private short itsSuperClassIndex; + private short itsSourceFileNameIndex; + + private static final int MIN_LABEL_TABLE_SIZE = 32; + private int[] itsLabelTable; + private int itsLabelTableTop; + +// itsFixupTable[i] = (label_index << 32) | fixup_site + private static final int MIN_FIXUP_TABLE_SIZE = 40; + private long[] itsFixupTable; + private int itsFixupTableTop; + private ObjArray itsVarDescriptors; + + private char[] tmpCharBuffer = new char[64]; +} + +final class ExceptionTableEntry +{ + + ExceptionTableEntry(int startLabel, int endLabel, + int handlerLabel, short catchType) + { + itsStartLabel = startLabel; + itsEndLabel = endLabel; + itsHandlerLabel = handlerLabel; + itsCatchType = catchType; + } + + int itsStartLabel; + int itsEndLabel; + int itsHandlerLabel; + short itsCatchType; +} + +final class ClassFileField +{ + + ClassFileField(short nameIndex, short typeIndex, short flags) + { + itsNameIndex = nameIndex; + itsTypeIndex = typeIndex; + itsFlags = flags; + itsHasAttributes = false; + } + + void setAttributes(short attr1, short attr2, short attr3, int index) + { + itsHasAttributes = true; + itsAttr1 = attr1; + itsAttr2 = attr2; + itsAttr3 = attr3; + itsIndex = index; + } + + int write(byte[] data, int offset) + { + offset = ClassFileWriter.putInt16(itsFlags, data, offset); + offset = ClassFileWriter.putInt16(itsNameIndex, data, offset); + offset = ClassFileWriter.putInt16(itsTypeIndex, data, offset); + if (!itsHasAttributes) { + // write 0 attributes + offset = ClassFileWriter.putInt16(0, data, offset); + } else { + offset = ClassFileWriter.putInt16(1, data, offset); + offset = ClassFileWriter.putInt16(itsAttr1, data, offset); + offset = ClassFileWriter.putInt16(itsAttr2, data, offset); + offset = ClassFileWriter.putInt16(itsAttr3, data, offset); + offset = ClassFileWriter.putInt16(itsIndex, data, offset); + } + return offset; + } + + int getWriteSize() + { + int size = 2 * 3; + if (!itsHasAttributes) { + size += 2; + } else { + size += 2 + 2 * 4; + } + return size; + } + + private short itsNameIndex; + private short itsTypeIndex; + private short itsFlags; + private boolean itsHasAttributes; + private short itsAttr1, itsAttr2, itsAttr3; + private int itsIndex; +} + +final class ClassFileMethod +{ + + ClassFileMethod(short nameIndex, short typeIndex, short flags) + { + itsNameIndex = nameIndex; + itsTypeIndex = typeIndex; + itsFlags = flags; + } + + void setCodeAttribute(byte codeAttribute[]) + { + itsCodeAttribute = codeAttribute; + } + + int write(byte[] data, int offset) + { + offset = ClassFileWriter.putInt16(itsFlags, data, offset); + offset = ClassFileWriter.putInt16(itsNameIndex, data, offset); + offset = ClassFileWriter.putInt16(itsTypeIndex, data, offset); + // Code attribute only + offset = ClassFileWriter.putInt16(1, data, offset); + System.arraycopy(itsCodeAttribute, 0, data, offset, + itsCodeAttribute.length); + offset += itsCodeAttribute.length; + return offset; + } + + int getWriteSize() + { + return 2 * 4 + itsCodeAttribute.length; + } + + private short itsNameIndex; + private short itsTypeIndex; + private short itsFlags; + private byte[] itsCodeAttribute; + +} + +final class ConstantPool +{ + + ConstantPool(ClassFileWriter cfw) + { + this.cfw = cfw; + itsTopIndex = 1; // the zero'th entry is reserved + itsPool = new byte[ConstantPoolSize]; + itsTop = 0; + } + + private static final int ConstantPoolSize = 256; + private static final byte + CONSTANT_Class = 7, + CONSTANT_Fieldref = 9, + CONSTANT_Methodref = 10, + CONSTANT_InterfaceMethodref = 11, + CONSTANT_String = 8, + CONSTANT_Integer = 3, + CONSTANT_Float = 4, + CONSTANT_Long = 5, + CONSTANT_Double = 6, + CONSTANT_NameAndType = 12, + CONSTANT_Utf8 = 1; + + int write(byte[] data, int offset) + { + offset = ClassFileWriter.putInt16((short)itsTopIndex, data, offset); + System.arraycopy(itsPool, 0, data, offset, itsTop); + offset += itsTop; + return offset; + } + + int getWriteSize() + { + return 2 + itsTop; + } + + int addConstant(int k) + { + ensure(5); + itsPool[itsTop++] = CONSTANT_Integer; + itsTop = ClassFileWriter.putInt32(k, itsPool, itsTop); + return (short)(itsTopIndex++); + } + + int addConstant(long k) + { + ensure(9); + itsPool[itsTop++] = CONSTANT_Long; + itsTop = ClassFileWriter.putInt64(k, itsPool, itsTop); + int index = itsTopIndex; + itsTopIndex += 2; + return index; + } + + int addConstant(float k) + { + ensure(5); + itsPool[itsTop++] = CONSTANT_Float; + int bits = Float.floatToIntBits(k); + itsTop = ClassFileWriter.putInt32(bits, itsPool, itsTop); + return itsTopIndex++; + } + + int addConstant(double k) + { + ensure(9); + itsPool[itsTop++] = CONSTANT_Double; + long bits = Double.doubleToLongBits(k); + itsTop = ClassFileWriter.putInt64(bits, itsPool, itsTop); + int index = itsTopIndex; + itsTopIndex += 2; + return index; + } + + int addConstant(String k) + { + int utf8Index = 0xFFFF & addUtf8(k); + int theIndex = itsStringConstHash.getInt(utf8Index, -1); + if (theIndex == -1) { + theIndex = itsTopIndex++; + ensure(3); + itsPool[itsTop++] = CONSTANT_String; + itsTop = ClassFileWriter.putInt16(utf8Index, itsPool, itsTop); + itsStringConstHash.put(utf8Index, theIndex); + } + return theIndex; + } + + boolean isUnderUtfEncodingLimit(String s) + { + int strLen = s.length(); + if (strLen * 3 <= MAX_UTF_ENCODING_SIZE) { + return true; + } else if (strLen > MAX_UTF_ENCODING_SIZE) { + return false; + } + return strLen == getUtfEncodingLimit(s, 0, strLen); + } + + /** + * Get maximum i such that <tt>start <= i <= end</tt> and + * <tt>s.substring(start, i)</tt> fits JVM UTF string encoding limit. + */ + int getUtfEncodingLimit(String s, int start, int end) + { + if ((end - start) * 3 <= MAX_UTF_ENCODING_SIZE) { + return end; + } + int limit = MAX_UTF_ENCODING_SIZE; + for (int i = start; i != end; i++) { + int c = s.charAt(i); + if (0 != c && c <= 0x7F) { + --limit; + } else if (c < 0x7FF) { + limit -= 2; + } else { + limit -= 3; + } + if (limit < 0) { + return i; + } + } + return end; + } + + short addUtf8(String k) + { + int theIndex = itsUtf8Hash.get(k, -1); + if (theIndex == -1) { + int strLen = k.length(); + boolean tooBigString; + if (strLen > MAX_UTF_ENCODING_SIZE) { + tooBigString = true; + } else { + tooBigString = false; + // Ask for worst case scenario buffer when each char takes 3 + // bytes + ensure(1 + 2 + strLen * 3); + int top = itsTop; + + itsPool[top++] = CONSTANT_Utf8; + top += 2; // skip length + + char[] chars = cfw.getCharBuffer(strLen); + k.getChars(0, strLen, chars, 0); + + for (int i = 0; i != strLen; i++) { + int c = chars[i]; + if (c != 0 && c <= 0x7F) { + itsPool[top++] = (byte)c; + } else if (c > 0x7FF) { + itsPool[top++] = (byte)(0xE0 | (c >> 12)); + itsPool[top++] = (byte)(0x80 | ((c >> 6) & 0x3F)); + itsPool[top++] = (byte)(0x80 | (c & 0x3F)); + } else { + itsPool[top++] = (byte)(0xC0 | (c >> 6)); + itsPool[top++] = (byte)(0x80 | (c & 0x3F)); + } + } + + int utfLen = top - (itsTop + 1 + 2); + if (utfLen > MAX_UTF_ENCODING_SIZE) { + tooBigString = true; + } else { + // Write back length + itsPool[itsTop + 1] = (byte)(utfLen >>> 8); + itsPool[itsTop + 2] = (byte)utfLen; + + itsTop = top; + theIndex = itsTopIndex++; + itsUtf8Hash.put(k, theIndex); + } + } + if (tooBigString) { + throw new IllegalArgumentException("Too big string"); + } + } + return (short)theIndex; + } + + private short addNameAndType(String name, String type) + { + short nameIndex = addUtf8(name); + short typeIndex = addUtf8(type); + ensure(5); + itsPool[itsTop++] = CONSTANT_NameAndType; + itsTop = ClassFileWriter.putInt16(nameIndex, itsPool, itsTop); + itsTop = ClassFileWriter.putInt16(typeIndex, itsPool, itsTop); + return (short)(itsTopIndex++); + } + + short addClass(String className) + { + int theIndex = itsClassHash.get(className, -1); + if (theIndex == -1) { + String slashed = className; + if (className.indexOf('.') > 0) { + slashed = ClassFileWriter.getSlashedForm(className); + theIndex = itsClassHash.get(slashed, -1); + if (theIndex != -1) { + itsClassHash.put(className, theIndex); + } + } + if (theIndex == -1) { + int utf8Index = addUtf8(slashed); + ensure(3); + itsPool[itsTop++] = CONSTANT_Class; + itsTop = ClassFileWriter.putInt16(utf8Index, itsPool, itsTop); + theIndex = itsTopIndex++; + itsClassHash.put(slashed, theIndex); + if (className != slashed) { + itsClassHash.put(className, theIndex); + } + } + } + return (short)theIndex; + } + + short addFieldRef(String className, String fieldName, String fieldType) + { + FieldOrMethodRef ref = new FieldOrMethodRef(className, fieldName, + fieldType); + + int theIndex = itsFieldRefHash.get(ref, -1); + if (theIndex == -1) { + short ntIndex = addNameAndType(fieldName, fieldType); + short classIndex = addClass(className); + ensure(5); + itsPool[itsTop++] = CONSTANT_Fieldref; + itsTop = ClassFileWriter.putInt16(classIndex, itsPool, itsTop); + itsTop = ClassFileWriter.putInt16(ntIndex, itsPool, itsTop); + theIndex = itsTopIndex++; + itsFieldRefHash.put(ref, theIndex); + } + return (short)theIndex; + } + + short addMethodRef(String className, String methodName, + String methodType) + { + FieldOrMethodRef ref = new FieldOrMethodRef(className, methodName, + methodType); + + int theIndex = itsMethodRefHash.get(ref, -1); + if (theIndex == -1) { + short ntIndex = addNameAndType(methodName, methodType); + short classIndex = addClass(className); + ensure(5); + itsPool[itsTop++] = CONSTANT_Methodref; + itsTop = ClassFileWriter.putInt16(classIndex, itsPool, itsTop); + itsTop = ClassFileWriter.putInt16(ntIndex, itsPool, itsTop); + theIndex = itsTopIndex++; + itsMethodRefHash.put(ref, theIndex); + } + return (short)theIndex; + } + + short addInterfaceMethodRef(String className, + String methodName, String methodType) + { + short ntIndex = addNameAndType(methodName, methodType); + short classIndex = addClass(className); + ensure(5); + itsPool[itsTop++] = CONSTANT_InterfaceMethodref; + itsTop = ClassFileWriter.putInt16(classIndex, itsPool, itsTop); + itsTop = ClassFileWriter.putInt16(ntIndex, itsPool, itsTop); + return (short)(itsTopIndex++); + } + + void ensure(int howMuch) + { + if (itsTop + howMuch > itsPool.length) { + int newCapacity = itsPool.length * 2; + if (itsTop + howMuch > newCapacity) { + newCapacity = itsTop + howMuch; + } + byte[] tmp = new byte[newCapacity]; + System.arraycopy(itsPool, 0, tmp, 0, itsTop); + itsPool = tmp; + } + } + + private ClassFileWriter cfw; + + private static final int MAX_UTF_ENCODING_SIZE = 65535; + + private UintMap itsStringConstHash = new UintMap(); + private ObjToIntMap itsUtf8Hash = new ObjToIntMap(); + private ObjToIntMap itsFieldRefHash = new ObjToIntMap(); + private ObjToIntMap itsMethodRefHash = new ObjToIntMap(); + private ObjToIntMap itsClassHash = new ObjToIntMap(); + + private int itsTop; + private int itsTopIndex; + private byte itsPool[]; +} + +final class FieldOrMethodRef +{ + FieldOrMethodRef(String className, String name, String type) + { + this.className = className; + this.name = name; + this.type = type; + } + + public boolean equals(Object obj) + { + if (!(obj instanceof FieldOrMethodRef)) { return false; } + FieldOrMethodRef x = (FieldOrMethodRef)obj; + return className.equals(x.className) + && name.equals(x.name) + && type.equals(x.type); + } + + public int hashCode() + { + if (hashCode == -1) { + int h1 = className.hashCode(); + int h2 = name.hashCode(); + int h3 = type.hashCode(); + hashCode = h1 ^ h2 ^ h3; + } + return hashCode; + } + + private String className; + private String name; + private String type; + private int hashCode = -1; +} |