Java Code Examples for com.sun.org.apache.bcel.internal.Constants#WIDE

The following examples show how to use com.sun.org.apache.bcel.internal.Constants#WIDE . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: Instruction.java    From jdk1.8-source-analysis with Apache License 2.0 4 votes vote down vote up 
/**
 * Read an instruction from (byte code) input stream and return the
 * appropiate object.
 *
 * @param file file to read from
 * @return instruction object being read
 */
public static final Instruction readInstruction(ByteSequence bytes)
  throws IOException
{
  boolean     wide   = false;
  short       opcode = (short)bytes.readUnsignedByte();
  Instruction obj    = null;

  if(opcode == Constants.WIDE) { // Read next opcode after wide byte
    wide = true;
    opcode  = (short)bytes.readUnsignedByte();
  }

  if(InstructionConstants.INSTRUCTIONS[opcode] != null)
    return InstructionConstants.INSTRUCTIONS[opcode]; // Used predefined immutable object, if available

  /* Find appropiate class, instantiate an (empty) instruction object
   * and initialize it by hand.
   */
  Class clazz;

  try {
    clazz = Class.forName(className(opcode));
  } catch (ClassNotFoundException cnfe){
    // If a class by that name does not exist, the opcode is illegal.
    // Note that IMPDEP1, IMPDEP2, BREAKPOINT are also illegal in a sense.
    throw new ClassGenException("Illegal opcode detected.");
  }

  try {
    obj = (Instruction)clazz.newInstance();

    if(wide && !((obj instanceof LocalVariableInstruction) ||
                 (obj instanceof IINC) ||
                 (obj instanceof RET)))
      throw new Exception("Illegal opcode after wide: " + opcode);

    obj.setOpcode(opcode);
    obj.initFromFile(bytes, wide); // Do further initializations, if any
    // Byte code offset set in InstructionList
  } catch(Exception e) { throw new ClassGenException(e.toString()); }

  return obj;
}
Example 2
Source File: Instruction.java    From TencentKona-8 with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * Read an instruction from (byte code) input stream and return the
 * appropiate object.
 *
 * @param file file to read from
 * @return instruction object being read
 */
public static final Instruction readInstruction(ByteSequence bytes)
  throws IOException
{
  boolean     wide   = false;
  short       opcode = (short)bytes.readUnsignedByte();
  Instruction obj    = null;

  if(opcode == Constants.WIDE) { // Read next opcode after wide byte
    wide = true;
    opcode  = (short)bytes.readUnsignedByte();
  }

  if(InstructionConstants.INSTRUCTIONS[opcode] != null)
    return InstructionConstants.INSTRUCTIONS[opcode]; // Used predefined immutable object, if available

  /* Find appropiate class, instantiate an (empty) instruction object
   * and initialize it by hand.
   */
  Class clazz;

  try {
    clazz = Class.forName(className(opcode));
  } catch (ClassNotFoundException cnfe){
    // If a class by that name does not exist, the opcode is illegal.
    // Note that IMPDEP1, IMPDEP2, BREAKPOINT are also illegal in a sense.
    throw new ClassGenException("Illegal opcode detected.");
  }

  try {
    obj = (Instruction)clazz.newInstance();

    if(wide && !((obj instanceof LocalVariableInstruction) ||
                 (obj instanceof IINC) ||
                 (obj instanceof RET)))
      throw new Exception("Illegal opcode after wide: " + opcode);

    obj.setOpcode(opcode);
    obj.initFromFile(bytes, wide); // Do further initializations, if any
    // Byte code offset set in InstructionList
  } catch(Exception e) { throw new ClassGenException(e.toString()); }

  return obj;
}
Example 3
Source File: Instruction.java    From jdk8u60 with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * Read an instruction from (byte code) input stream and return the
 * appropiate object.
 *
 * @param file file to read from
 * @return instruction object being read
 */
public static final Instruction readInstruction(ByteSequence bytes)
  throws IOException
{
  boolean     wide   = false;
  short       opcode = (short)bytes.readUnsignedByte();
  Instruction obj    = null;

  if(opcode == Constants.WIDE) { // Read next opcode after wide byte
    wide = true;
    opcode  = (short)bytes.readUnsignedByte();
  }

  if(InstructionConstants.INSTRUCTIONS[opcode] != null)
    return InstructionConstants.INSTRUCTIONS[opcode]; // Used predefined immutable object, if available

  /* Find appropiate class, instantiate an (empty) instruction object
   * and initialize it by hand.
   */
  Class clazz;

  try {
    clazz = Class.forName(className(opcode));
  } catch (ClassNotFoundException cnfe){
    // If a class by that name does not exist, the opcode is illegal.
    // Note that IMPDEP1, IMPDEP2, BREAKPOINT are also illegal in a sense.
    throw new ClassGenException("Illegal opcode detected.");
  }

  try {
    obj = (Instruction)clazz.newInstance();

    if(wide && !((obj instanceof LocalVariableInstruction) ||
                 (obj instanceof IINC) ||
                 (obj instanceof RET)))
      throw new Exception("Illegal opcode after wide: " + opcode);

    obj.setOpcode(opcode);
    obj.initFromFile(bytes, wide); // Do further initializations, if any
    // Byte code offset set in InstructionList
  } catch(Exception e) { throw new ClassGenException(e.toString()); }

  return obj;
}
Example 4
Source File: Instruction.java    From JDKSourceCode1.8 with MIT License 4 votes vote down vote up 
/**
 * Read an instruction from (byte code) input stream and return the
 * appropiate object.
 *
 * @param file file to read from
 * @return instruction object being read
 */
public static final Instruction readInstruction(ByteSequence bytes)
  throws IOException
{
  boolean     wide   = false;
  short       opcode = (short)bytes.readUnsignedByte();
  Instruction obj    = null;

  if(opcode == Constants.WIDE) { // Read next opcode after wide byte
    wide = true;
    opcode  = (short)bytes.readUnsignedByte();
  }

  if(InstructionConstants.INSTRUCTIONS[opcode] != null)
    return InstructionConstants.INSTRUCTIONS[opcode]; // Used predefined immutable object, if available

  /* Find appropiate class, instantiate an (empty) instruction object
   * and initialize it by hand.
   */
  Class clazz;

  try {
    clazz = Class.forName(className(opcode));
  } catch (ClassNotFoundException cnfe){
    // If a class by that name does not exist, the opcode is illegal.
    // Note that IMPDEP1, IMPDEP2, BREAKPOINT are also illegal in a sense.
    throw new ClassGenException("Illegal opcode detected.");
  }

  try {
    obj = (Instruction)clazz.newInstance();

    if(wide && !((obj instanceof LocalVariableInstruction) ||
                 (obj instanceof IINC) ||
                 (obj instanceof RET)))
      throw new Exception("Illegal opcode after wide: " + opcode);

    obj.setOpcode(opcode);
    obj.initFromFile(bytes, wide); // Do further initializations, if any
    // Byte code offset set in InstructionList
  } catch(Exception e) { throw new ClassGenException(e.toString()); }

  return obj;
}
Example 5
Source File: Instruction.java    From openjdk-jdk8u with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * Read an instruction from (byte code) input stream and return the
 * appropiate object.
 *
 * @param file file to read from
 * @return instruction object being read
 */
public static final Instruction readInstruction(ByteSequence bytes)
  throws IOException
{
  boolean     wide   = false;
  short       opcode = (short)bytes.readUnsignedByte();
  Instruction obj    = null;

  if(opcode == Constants.WIDE) { // Read next opcode after wide byte
    wide = true;
    opcode  = (short)bytes.readUnsignedByte();
  }

  if(InstructionConstants.INSTRUCTIONS[opcode] != null)
    return InstructionConstants.INSTRUCTIONS[opcode]; // Used predefined immutable object, if available

  /* Find appropiate class, instantiate an (empty) instruction object
   * and initialize it by hand.
   */
  Class clazz;

  try {
    clazz = Class.forName(className(opcode));
  } catch (ClassNotFoundException cnfe){
    // If a class by that name does not exist, the opcode is illegal.
    // Note that IMPDEP1, IMPDEP2, BREAKPOINT are also illegal in a sense.
    throw new ClassGenException("Illegal opcode detected.");
  }

  try {
    obj = (Instruction)clazz.newInstance();

    if(wide && !((obj instanceof LocalVariableInstruction) ||
                 (obj instanceof IINC) ||
                 (obj instanceof RET)))
      throw new Exception("Illegal opcode after wide: " + opcode);

    obj.setOpcode(opcode);
    obj.initFromFile(bytes, wide); // Do further initializations, if any
    // Byte code offset set in InstructionList
  } catch(Exception e) { throw new ClassGenException(e.toString()); }

  return obj;
}
Example 6
Source File: Instruction.java    From openjdk-jdk8u-backup with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * Read an instruction from (byte code) input stream and return the
 * appropiate object.
 *
 * @param file file to read from
 * @return instruction object being read
 */
public static final Instruction readInstruction(ByteSequence bytes)
  throws IOException
{
  boolean     wide   = false;
  short       opcode = (short)bytes.readUnsignedByte();
  Instruction obj    = null;

  if(opcode == Constants.WIDE) { // Read next opcode after wide byte
    wide = true;
    opcode  = (short)bytes.readUnsignedByte();
  }

  if(InstructionConstants.INSTRUCTIONS[opcode] != null)
    return InstructionConstants.INSTRUCTIONS[opcode]; // Used predefined immutable object, if available

  /* Find appropiate class, instantiate an (empty) instruction object
   * and initialize it by hand.
   */
  Class clazz;

  try {
    clazz = Class.forName(className(opcode));
  } catch (ClassNotFoundException cnfe){
    // If a class by that name does not exist, the opcode is illegal.
    // Note that IMPDEP1, IMPDEP2, BREAKPOINT are also illegal in a sense.
    throw new ClassGenException("Illegal opcode detected.");
  }

  try {
    obj = (Instruction)clazz.newInstance();

    if(wide && !((obj instanceof LocalVariableInstruction) ||
                 (obj instanceof IINC) ||
                 (obj instanceof RET)))
      throw new Exception("Illegal opcode after wide: " + opcode);

    obj.setOpcode(opcode);
    obj.initFromFile(bytes, wide); // Do further initializations, if any
    // Byte code offset set in InstructionList
  } catch(Exception e) { throw new ClassGenException(e.toString()); }

  return obj;
}
Example 7
Source File: Instruction.java    From openjdk-jdk9 with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * Read an instruction from (byte code) input stream and return the
 * appropiate object.
 *
 * @param file file to read from
 * @return instruction object being read
 */
public static final Instruction readInstruction(ByteSequence bytes)
  throws IOException
{
  boolean     wide   = false;
  short       opcode = (short)bytes.readUnsignedByte();
  Instruction obj    = null;

  if(opcode == Constants.WIDE) { // Read next opcode after wide byte
    wide = true;
    opcode  = (short)bytes.readUnsignedByte();
  }

  if(InstructionConstants.INSTRUCTIONS[opcode] != null)
    return InstructionConstants.INSTRUCTIONS[opcode]; // Used predefined immutable object, if available

  /* Find appropiate class, instantiate an (empty) instruction object
   * and initialize it by hand.
   */
  Class clazz;

  try {
    clazz = Class.forName(className(opcode));
  } catch (ClassNotFoundException cnfe){
    // If a class by that name does not exist, the opcode is illegal.
    // Note that IMPDEP1, IMPDEP2, BREAKPOINT are also illegal in a sense.
    throw new ClassGenException("Illegal opcode detected.");
  }

  try {
    obj = (Instruction)clazz.newInstance();

    if(wide && !((obj instanceof LocalVariableInstruction) ||
                 (obj instanceof IINC) ||
                 (obj instanceof RET)))
      throw new Exception("Illegal opcode after wide: " + opcode);

    obj.setOpcode(opcode);
    obj.initFromFile(bytes, wide); // Do further initializations, if any
    // Byte code offset set in InstructionList
  } catch(Exception e) { throw new ClassGenException(e.toString()); }

  return obj;
}
Example 8
Source File: Instruction.java    From hottub with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * Read an instruction from (byte code) input stream and return the
 * appropiate object.
 *
 * @param file file to read from
 * @return instruction object being read
 */
public static final Instruction readInstruction(ByteSequence bytes)
  throws IOException
{
  boolean     wide   = false;
  short       opcode = (short)bytes.readUnsignedByte();
  Instruction obj    = null;

  if(opcode == Constants.WIDE) { // Read next opcode after wide byte
    wide = true;
    opcode  = (short)bytes.readUnsignedByte();
  }

  if(InstructionConstants.INSTRUCTIONS[opcode] != null)
    return InstructionConstants.INSTRUCTIONS[opcode]; // Used predefined immutable object, if available

  /* Find appropiate class, instantiate an (empty) instruction object
   * and initialize it by hand.
   */
  Class clazz;

  try {
    clazz = Class.forName(className(opcode));
  } catch (ClassNotFoundException cnfe){
    // If a class by that name does not exist, the opcode is illegal.
    // Note that IMPDEP1, IMPDEP2, BREAKPOINT are also illegal in a sense.
    throw new ClassGenException("Illegal opcode detected.");
  }

  try {
    obj = (Instruction)clazz.newInstance();

    if(wide && !((obj instanceof LocalVariableInstruction) ||
                 (obj instanceof IINC) ||
                 (obj instanceof RET)))
      throw new Exception("Illegal opcode after wide: " + opcode);

    obj.setOpcode(opcode);
    obj.initFromFile(bytes, wide); // Do further initializations, if any
    // Byte code offset set in InstructionList
  } catch(Exception e) { throw new ClassGenException(e.toString()); }

  return obj;
}
Example 9
Source File: Instruction.java    From openjdk-8-source with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * Read an instruction from (byte code) input stream and return the
 * appropiate object.
 *
 * @param file file to read from
 * @return instruction object being read
 */
public static final Instruction readInstruction(ByteSequence bytes)
  throws IOException
{
  boolean     wide   = false;
  short       opcode = (short)bytes.readUnsignedByte();
  Instruction obj    = null;

  if(opcode == Constants.WIDE) { // Read next opcode after wide byte
    wide = true;
    opcode  = (short)bytes.readUnsignedByte();
  }

  if(InstructionConstants.INSTRUCTIONS[opcode] != null)
    return InstructionConstants.INSTRUCTIONS[opcode]; // Used predefined immutable object, if available

  /* Find appropiate class, instantiate an (empty) instruction object
   * and initialize it by hand.
   */
  Class clazz;

  try {
    clazz = Class.forName(className(opcode));
  } catch (ClassNotFoundException cnfe){
    // If a class by that name does not exist, the opcode is illegal.
    // Note that IMPDEP1, IMPDEP2, BREAKPOINT are also illegal in a sense.
    throw new ClassGenException("Illegal opcode detected.");
  }

  try {
    obj = (Instruction)clazz.newInstance();

    if(wide && !((obj instanceof LocalVariableInstruction) ||
                 (obj instanceof IINC) ||
                 (obj instanceof RET)))
      throw new Exception("Illegal opcode after wide: " + opcode);

    obj.setOpcode(opcode);
    obj.initFromFile(bytes, wide); // Do further initializations, if any
    // Byte code offset set in InstructionList
  } catch(Exception e) { throw new ClassGenException(e.toString()); }

  return obj;
}
Example 10
Source File: Instruction.java    From openjdk-8 with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * Read an instruction from (byte code) input stream and return the
 * appropiate object.
 *
 * @param file file to read from
 * @return instruction object being read
 */
public static final Instruction readInstruction(ByteSequence bytes)
  throws IOException
{
  boolean     wide   = false;
  short       opcode = (short)bytes.readUnsignedByte();
  Instruction obj    = null;

  if(opcode == Constants.WIDE) { // Read next opcode after wide byte
    wide = true;
    opcode  = (short)bytes.readUnsignedByte();
  }

  if(InstructionConstants.INSTRUCTIONS[opcode] != null)
    return InstructionConstants.INSTRUCTIONS[opcode]; // Used predefined immutable object, if available

  /* Find appropiate class, instantiate an (empty) instruction object
   * and initialize it by hand.
   */
  Class clazz;

  try {
    clazz = Class.forName(className(opcode));
  } catch (ClassNotFoundException cnfe){
    // If a class by that name does not exist, the opcode is illegal.
    // Note that IMPDEP1, IMPDEP2, BREAKPOINT are also illegal in a sense.
    throw new ClassGenException("Illegal opcode detected.");
  }

  try {
    obj = (Instruction)clazz.newInstance();

    if(wide && !((obj instanceof LocalVariableInstruction) ||
                 (obj instanceof IINC) ||
                 (obj instanceof RET)))
      throw new Exception("Illegal opcode after wide: " + opcode);

    obj.setOpcode(opcode);
    obj.initFromFile(bytes, wide); // Do further initializations, if any
    // Byte code offset set in InstructionList
  } catch(Exception e) { throw new ClassGenException(e.toString()); }

  return obj;
}