org.multijava.mjc
Class CodeSequence

java.lang.Object
  org.multijava.util.Utils
      org.multijava.mjc.CodeSequence

All Implemented Interfaces:

Cloneable, Constants

public final class CodeSequence

extends Utils

implements Constants

Field Summary
private  Stack	contexts
private  boolean	discardValue
private  ArrayList	handlers
private  Instruction[]	instructions
private  boolean	labelAtEnd
private  int	lastLine
private  int	lineNumber
private  ArrayList	lines
private  int	pc
private static Stack	stack

 

Fields inherited from class org.multijava.util.Utils

DBG_LEVEL_HIGH, DBG_LEVEL_LOW, DBG_LEVEL_NO

 

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
private	CodeSequence()           Constructs a code attribute.

 

Method Summary
void	addExceptionHandler(HandlerInfo info)           Add an exception handler to this code
private  void	addLocalVarInfo(LocalVarInstruction insn, JLocalVariable var)           Add a local variable name information
boolean	discardValue()
void	ensureFinalReturn()           Ensures that the code block ends with a no-argument return statement.
static CodeSequence	getCodeSequence()           Constructs a code sequence.
HandlerInfo[]	getHandlers()           Returns an array of all exception handler
Instruction[]	getInstructionArray()           Return the instruction as a list WARNING: AFTER a call to release() this array will be reused
Instruction	getInstructionAt(int pc)           Returns the instruction at a given position
LineNumberInfo[]	getLineNumbers()
LocalVariableInfo[]	getLocalVariableInfos()
int	getPC()           Gets the location in code sequence
static void	initSession()
void	plantBreak(JStatement top)           Ask the code handler to generate the necessary code to call every finally and monitorexit
void	plantInstruction(Instruction insn)           Adds an instruction to the code of the current method.
void	plantLabel(CodeLabel label)           Adds an instruction to the code of the current method.
void	plantLabelRef(int opcode, CodeLabel label)           Adds an instruction to the code of the current method.
void	plantLoadThis()           Adds a load of this (local var 0)
void	plantLocalVar(int opcode, JLocalVariable var)           Adds a local var instruction to the code of the current method.
void	plantReturn(JReturnStatement ret)           Ask the code handler to generate the necessary code to call every finally clause of all try statements
void	plantSwap()           Plants a swap instruction on the end of this code sequence.
void	popContext(JStatement stmt)           Informs the code handlers that we exit a breakable code.
void	pushContext(JStatement stmt)           Informs the code handlers that we begin a portion of breakable code.
void	release()           Release a code sequence
private  void	resolveLabels()
void	setDiscardValue(boolean discardValue)
void	setLineNumber(int lineNumber)
int	size()           Returns the actual size of code (number of instruction)

 

Methods inherited from class org.multijava.util.Utils

assertTrue, assertTrue, combineArrays, escapeString, escapeString, fail, fail, getFilePath, hasFlag, hasOtherFlags, parsePathParts, relativePathTo, splitQualifiedName, splitQualifiedName, stripJavaModifiers, stripNonJavaModifiers, stripPrivateModifier, unescapeString, vectorToArray, vectorToIntArray

 

Methods inherited from class java.lang.Object

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

 

Field Detail

instructions

private Instruction[] instructions

handlers

private ArrayList handlers

lines

private ArrayList lines

pc

private int pc

discardValue

private boolean discardValue

labelAtEnd

private boolean labelAtEnd

lineNumber

private int lineNumber

lastLine

private int lastLine

contexts

private Stack contexts

stack

private static final Stack stack

CodeSequence

private CodeSequence()

Constructs a code attribute.

getCodeSequence

public static CodeSequence getCodeSequence()

Constructs a code sequence.

release

public void release()

Release a code sequence

initSession

public static void initSession()

plantInstruction

public final void plantInstruction(Instruction insn)

Adds an instruction to the code of the current method.

Parameters:

insn - the instruction to append

plantLocalVar

public final void plantLocalVar(int opcode,
                                JLocalVariable var)

Adds a local var instruction to the code of the current method.

plantLoadThis

public final void plantLoadThis()

Adds a load of this (local var 0)

plantLabelRef

public final void plantLabelRef(int opcode,
                                CodeLabel label)

Adds an instruction to the code of the current method.

plantLabel

public final void plantLabel(CodeLabel label)

Adds an instruction to the code of the current method.

plantSwap

public final void plantSwap()

Plants a swap instruction on the end of this code sequence.

setLineNumber

public final void setLineNumber(int lineNumber)

Parameters:

lineNumber - the current line number in source code

getLineNumbers

public final LineNumberInfo[] getLineNumbers()

Returns:

an array of line number information

getLocalVariableInfos

public final LocalVariableInfo[] getLocalVariableInfos()

Returns:

an array of local vars information

setDiscardValue

public final void setDiscardValue(boolean discardValue)

Parameters:

discardValue - set if the value of subexpression should be discarded

discardValue

public final boolean discardValue()

Returns:

true if super expression use value of sub expression

plantReturn

public final void plantReturn(JReturnStatement ret)

Ask the code handler to generate the necessary code to call every finally clause of all try statements

plantBreak

public final void plantBreak(JStatement top)

Ask the code handler to generate the necessary code to call every finally and monitorexit

ensureFinalReturn

public final void ensureFinalReturn()

Ensures that the code block ends with a no-argument return statement. This method should be called as the last step of code generation for the body of a method with a return type of void.

pushContext

public final void pushContext(JStatement stmt)

Informs the code handlers that we begin a portion of breakable code.

popContext

public final void popContext(JStatement stmt)

Informs the code handlers that we exit a breakable code. Checks that contexts match.

addExceptionHandler

public final void addExceptionHandler(HandlerInfo info)

Add an exception handler to this code

getHandlers

public final HandlerInfo[] getHandlers()

Returns an array of all exception handler

getPC

public final int getPC()

Gets the location in code sequence

size

public final int size()

Returns the actual size of code (number of instruction)

getInstructionAt

public final Instruction getInstructionAt(int pc)

Returns the instruction at a given position

getInstructionArray

public Instruction[] getInstructionArray()

Return the instruction as a list WARNING: AFTER a call to release() this array will be reused

resolveLabels

private void resolveLabels()

addLocalVarInfo

private final void addLocalVarInfo(LocalVarInstruction insn,
                                   JLocalVariable var)

Add a local variable name information