org.multijava.util.classfile
Class NoArgInstruction

java.lang.Object
  org.multijava.util.classfile.AbstractInstructionAccessor
      org.multijava.util.classfile.Instruction
          org.multijava.util.classfile.NoArgInstruction

All Implemented Interfaces:

Constants, InstructionAccessor

public class NoArgInstruction

extends Instruction

This class represents instructions that take no arguments. opc_dastore, opc_lastore, opc_aastore, opc_bastore, opc_castore, opc_dcmpg, opc_dcmpl, opc_fastore, opc_iastore, opc_lcmp, opc_sastore, opc_dadd, opc_ddiv, opc_dmul, opc_drem, opc_dreturn, opc_dsub, opc_ladd, opc_land, opc_ldiv, opc_lmul, opc_lor, opc_lrem, opc_lreturn, opc_lsub, opc_lxor, opc_pop2, opc_aaload, opc_areturn, opc_athrow, opc_baload, opc_caload, opc_d2f, opc_d2i, opc_fadd, opc_faload, opc_fcmpg, opc_fcmpl, opc_fdiv, opc_fmul, opc_frem, opc_freturn, opc_fsub, opc_iadd, opc_iaload, opc_iand, opc_idiv, opc_imul, opc_isub, opc_irem, opc_ishl, opc_ishr, opc_iushr, opc_ior, opc_ixor, opc_l2f, opc_l2i, opc_lshl, opc_lshr, opc_lushr, opc_monitorenter, opc_monitorexit, opc_pop, opc_saload, opc_ireturn, opc_nop, opc_arraylength, opc_d2l, opc_daload, opc_dneg, opc_f2i, opc_fneg, opc_i2b, opc_i2c, opc_i2f, opc_i2s, opc_ineg, opc_l2d, opc_laload, opc_lneg, opc_return, opc_swap, opc_aconst_null, opc_dup, opc_dup_x1, opc_dup_x2, opc_f2d, opc_f2l, opc_i2d, opc_i2l, opc_dup2, opc_dup2_x1, opc_dup2_x2

Field Summary

 

Fields inherited from class org.multijava.util.classfile.Instruction

 

Fields inherited from interface org.multijava.util.classfile.Constants

ACC_ABSTRACT, ACC_FINAL, ACC_INTERFACE, ACC_NATIVE, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_STATIC, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_VOLATILE, ACCESS_FLAG_ARRAY, ACCESS_FLAG_NAMES, ATT_ANCHOR, ATT_BRIDGE, ATT_CODE, ATT_CONSTANTVALUE, ATT_DEPRECATED, ATT_DISPATCHER, ATT_EXCEPTIONS, ATT_GENERIC, ATT_GENERIC_FUNCTIONS, ATT_INNERCLASSES, ATT_LINENUMBERTABLE, ATT_LOCALVARIABLETABLE, ATT_MM_BODY, ATT_REDIRECTOR, ATT_RMJ_GLUE, ATT_RMJ_SIGNATURE, ATT_RUNTIME_VISIBLE_ANNOTATIONS, ATT_RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS, ATT_SIGNATURE, ATT_SOURCEFILE, ATT_SYNTHETIC, ATT_UNIVERSE_FIELD, ATT_UNIVERSE_METHOD, ATT_UNIVERSE_VERSION, CST_CLASS, CST_DOUBLE, CST_FIELD, CST_FLOAT, CST_INTEGER, CST_INTERFACEMETHOD, CST_LONG, CST_METHOD, CST_NAMEANDTYPE, CST_STRING, CST_UTF8, ENV_DEBUG_MODE, ENV_USE_CACHE, JAVA_MAGIC, JAVA_MAJOR, JAVA_MINOR, MAX_CODE_PER_METHOD, opc_aaload, opc_aastore, opc_aconst_null, opc_aload, opc_aload_0, opc_aload_1, opc_aload_2, opc_aload_3, opc_anewarray, opc_areturn, opc_arraylength, opc_astore, opc_astore_0, opc_astore_1, opc_astore_2, opc_astore_3, opc_athrow, opc_baload, opc_bastore, opc_bipush, opc_caload, opc_castore, opc_checkcast, opc_d2f, opc_d2i, opc_d2l, opc_dadd, opc_daload, opc_dastore, opc_dcmpg, opc_dcmpl, opc_dconst_0, opc_dconst_1, opc_ddiv, opc_dload, opc_dload_0, opc_dload_1, opc_dload_2, opc_dload_3, opc_dmul, opc_dneg, opc_drem, opc_dreturn, opc_dstore, opc_dstore_0, opc_dstore_1, opc_dstore_2, opc_dstore_3, opc_dsub, opc_dup, opc_dup2, opc_dup2_x1, opc_dup2_x2, opc_dup_x1, opc_dup_x2, opc_f2d, opc_f2i, opc_f2l, opc_fadd, opc_faload, opc_fastore, opc_fcmpg, opc_fcmpl, opc_fconst_0, opc_fconst_1, opc_fconst_2, opc_fdiv, opc_fload, opc_fload_0, opc_fload_1, opc_fload_2, opc_fload_3, opc_fmul, opc_fneg, opc_frem, opc_freturn, opc_fstore, opc_fstore_0, opc_fstore_1, opc_fstore_2, opc_fstore_3, opc_fsub, opc_getfield, opc_getstatic, opc_goto, opc_goto_w, opc_i2b, opc_i2c, opc_i2d, opc_i2f, opc_i2l, opc_i2s, opc_iadd, opc_iaload, opc_iand, opc_iastore, opc_iconst_0, opc_iconst_1, opc_iconst_2, opc_iconst_3, opc_iconst_4, opc_iconst_5, opc_iconst_m1, opc_idiv, opc_if_acmpeq, opc_if_acmpne, opc_if_icmpeq, opc_if_icmpge, opc_if_icmpgt, opc_if_icmple, opc_if_icmplt, opc_if_icmpne, opc_ifeq, opc_ifge, opc_ifgt, opc_ifle, opc_iflt, opc_ifne, opc_ifnonnull, opc_ifnull, opc_iinc, opc_iload, opc_iload_0, opc_iload_1, opc_iload_2, opc_iload_3, opc_imul, opc_ineg, opc_instanceof, opc_invokeinterface, opc_invokespecial, opc_invokestatic, opc_invokevirtual, opc_ior, opc_irem, opc_ireturn, opc_ishl, opc_ishr, opc_istore, opc_istore_0, opc_istore_1, opc_istore_2, opc_istore_3, opc_isub, opc_iushr, opc_ixor, opc_jsr, opc_jsr_w, opc_l2d, opc_l2f, opc_l2i, opc_ladd, opc_laload, opc_land, opc_lastore, opc_lcmp, opc_lconst_0, opc_lconst_1, opc_ldc, opc_ldc2_w, opc_ldc_w, opc_ldiv, opc_lload, opc_lload_0, opc_lload_1, opc_lload_2, opc_lload_3, opc_lmul, opc_lneg, opc_lookupswitch, opc_lor, opc_lrem, opc_lreturn, opc_lshl, opc_lshr, opc_lstore, opc_lstore_0, opc_lstore_1, opc_lstore_2, opc_lstore_3, opc_lsub, opc_lushr, opc_lxor, opc_monitorenter, opc_monitorexit, opc_multianewarray, opc_new, opc_newarray, opc_nop, opc_pop, opc_pop2, opc_putfield, opc_putstatic, opc_ret, opc_return, opc_saload, opc_sastore, opc_sipush, opc_swap, opc_tableswitch, opc_wide, opc_xxxunusedxxx, POO_ASCII_CONSTANT, POO_CLASS_CONSTANT, POO_DOUBLE_CONSTANT, POO_FLOAT_CONSTANT, POO_INTEGER_CONSTANT, POO_LONG_CONSTANT, POO_NAT_CONSTANT, POO_REF_CONSTANT, POO_STRING_CONSTANT, TYP_ADDRESS, TYP_DOUBLE, TYP_FLOAT, TYP_INT, TYP_LONG, TYP_REFERENCE, TYP_VOID

 

Constructor Summary

NoArgInstruction(int opcode)           Constructs a new instruction that takes no arguments

 

Method Summary
boolean	canComplete()           Returns true iff control flow can reach the next instruction in textual order.
(package private)  void	check(CodeEnv env, int curStack)           Verifies the enclosed instruction and computes the stack height.
int	getPushedOnStack()           Returns the size of data pushed on the stack by this instruction
byte	getReturnType()           Returns the type pushed on the stack
(package private)  int	getSize()           Returns the number of bytes used by the the instruction in the code array.
int	getStack()           Return the amount of stack (positive or negative) used by this instruction
boolean	isLiteral()           Return true if this instruction is a literal
(package private)  void	resolveConstants(ConstantPool cp)           Insert or check location of constant value on constant pool
(package private)  void	write(ConstantPool cp, DataOutput out)           Write this instruction into a file

 

Methods inherited from class org.multijava.util.classfile.Instruction

computeEndAddress, dump, getAddress, getLocalVar, getOpcode, getPoppedFromStack, setAddress, setOpcode

 

Methods inherited from class org.multijava.util.classfile.AbstractInstructionAccessor

transform

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

NoArgInstruction

public NoArgInstruction(int opcode)

Constructs a new instruction that takes no arguments

Parameters:

opcode - the opcode of the instruction

canComplete

public boolean canComplete()

Returns true iff control flow can reach the next instruction in textual order.

getSize

int getSize()

Returns the number of bytes used by the the instruction in the code array.

getReturnType

public byte getReturnType()

Returns the type pushed on the stack

getPushedOnStack

public int getPushedOnStack()

Returns the size of data pushed on the stack by this instruction

getStack

public int getStack()

Return the amount of stack (positive or negative) used by this instruction

isLiteral

public boolean isLiteral()

Return true if this instruction is a literal

Overrides:

isLiteral in class Instruction

check

void check(CodeEnv env,
           int curStack)
     throws ClassFileFormatException

Verifies the enclosed instruction and computes the stack height.

Overrides:

check in class Instruction

Parameters:

env - the check environment

curStack - the stack height at the end of the execution of the instruction

Returns:

true iff the next instruction in textual order needs to be checked, i.e. this instruction has not been checked before and it can complete normally

Throws:

ClassFileFormatException - a problem was detected

resolveConstants

void resolveConstants(ConstantPool cp)

Insert or check location of constant value on constant pool

Parameters:

cp - the constant pool for this class

write

void write(ConstantPool cp,
           DataOutput out)
     throws IOException

Write this instruction into a file

Parameters:

cp - the constant pool that contain all data

out - the file where to write this object info

Throws:

IOException - an io problem has occured