Class CodeAttr

java.lang.Object

org.openjdk.asmtools.jasm.AttrData

org.openjdk.asmtools.jasm.CodeAttr

All Implemented Interfaces:

ConstantPoolDataVisitor, DataWriter

class CodeAttr
extends AttrData

4.7.3. The Code Attribute

Code_attribute { u2 attribute_name_index; u4 attribute_length; u2 max_stack; u2 max_locals; u4 code_length; u1 code[code_length]; u2 exception_table_length; { u2 start_pc; u2 end_pc; u2 handler_pc; u2 catch_type; } exception_table[exception_table_length]; u2 attributes_count; attribute_info attributes[attributes_count]; }

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	CodeAttr.Label
static class	CodeAttr.Local
(package private) static class	CodeAttr.RangePC

Field Summary

Fields

Modifier and Type	Field	Description
protected DataVector<DataVectorAttr<? extends DataWriter>>	attributes
protected ClassData	classData
protected int	curPC
protected JasmEnvironment	environment
protected DataVector<ExceptionData>	exceptionTable
protected DataVectorAttr<TypeAnnotationData>	inVisTypeAnnotations
protected HashMap<String, CodeAttr.Label>	labelsHash
protected Instr	lastInstr
protected long	lastLineNumber
protected DataVectorAttr<LineNumberData>	lineNumberTable
protected DataVectorAttr<LocalVariableData>	localVariableTable
protected DataVectorAttr<LocalVariableData>	localVariableTypeTable
protected final List<LocalVariableData>	locVarSlots
protected final List<LocalVariableData>	locVarTypeSlots
protected Indexer	max_locals
protected Indexer	max_stack
protected MethodData	methodData
protected List<StackMapData>	stackMapEntries
protected DataVectorAttr<StackMapData>	stackMapTable
protected HashMap<String, CodeAttr.RangePC>	trapsHash
private final LocalVariableData	VACANT
protected DataVectorAttr<TypeAnnotationData>	visTypeAnnotations
protected Instr	zeroInstr

Constructor Summary

Constructors

Constructor	Description
CodeAttr(MethodData methodData, int paramCount, Indexer max_stack, Indexer max_locals)

Method Summary

Modifier and Type	Method	Description
void	addAnnotations(ArrayList<AnnotationData> list)
(package private) void	addInstr(long mnenoc_pos, OpcodeTables.Opcode opcode, Indexer arg, Object arg2)
int	attrLength()
(package private) void	beginTrap(long pos, String name)
(package private) void	checkLabels()
(package private) void	checkLocVars(OpcodeTables.Opcode opcode)
(package private) void	checkTraps()
(package private) void	endCode()
(package private) void	endTrap(long pos, String name)
void	fillLineTable(List<LineNumberData> list)
void	fillLocalVariableTable(boolean isTypeTable, List<LocalVariableData> list)	Fills either localVariableTable or localVariableTypeTable according to the boolean parameter isTypeTable
void	fillStackMapTable(List<StackMapData> list)
StackMapData	getNextStackMapTable()
private StackMapData	getPreviousStackMapEntry()
StackMapData	getStackMapTable()
boolean	isTypeCheckingVerifier()
(package private) CodeAttr.Label	labelDecl(String name)
CodeAttr.Label	LabelDef(long pos, String name)
CodeAttr.Label	LabelRef(String name)
void	LocVarDataDef(OpcodeTables.Opcode opcode, long position, int index, ConstCell<?> nameCell, ConstCell<?> descriptorCell)	Constructs the local variable nameCell:descriptorCell assigned to the slot index.
void	LocVarDataEnd(OpcodeTables.Opcode opcode, short slot, long position)	Marks the end of Local Variable (Type) presented in the form endVar index: locVarSlots[slot] = VACANT and sets the Length of the Local Var
(package private) CodeAttr.RangePC	trapDecl(long pos, String name)
(package private) void	trapHandler(long pos, String name, Indexer type)
void	write(CheckedDataOutputStream out)

Methods inherited from class AttrData

classifyConstCell, getAttribute, getLength, visit

Methods inherited from class Object

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

Methods inherited from interface ConstantPoolDataVisitor

visitConstCell, visitData

Methods inherited from interface DataWriter

isCountable

Field Details

locVarSlots

protected final List<LocalVariableData> locVarSlots

locVarTypeSlots

protected final List<LocalVariableData> locVarTypeSlots

VACANT

private final LocalVariableData VACANT

classData

protected ClassData classData

methodData

protected MethodData methodData

environment

protected JasmEnvironment environment

max_stack

protected Indexer max_stack

max_locals

protected Indexer max_locals

zeroInstr

protected Instr zeroInstr

lastInstr

protected Instr lastInstr

curPC

protected int curPC

exceptionTable

protected DataVector<ExceptionData> exceptionTable

lineNumberTable

protected DataVectorAttr<LineNumberData> lineNumberTable

lastLineNumber

protected long lastLineNumber

localVariableTable

protected DataVectorAttr<LocalVariableData> localVariableTable

localVariableTypeTable

protected DataVectorAttr<LocalVariableData> localVariableTypeTable

attributes

protected DataVector<DataVectorAttr<? extends DataWriter>> attributes

labelsHash

protected HashMap<String, CodeAttr.Label> labelsHash

trapsHash

protected HashMap<String, CodeAttr.RangePC> trapsHash

stackMapEntries

protected List<StackMapData> stackMapEntries

stackMapTable

protected DataVectorAttr<StackMapData> stackMapTable

visTypeAnnotations

protected DataVectorAttr<TypeAnnotationData> visTypeAnnotations

inVisTypeAnnotations

protected DataVectorAttr<TypeAnnotationData> inVisTypeAnnotations

Constructor Details

CodeAttr

public CodeAttr(MethodData methodData,
 int paramCount,
 Indexer max_stack,
 Indexer max_locals)

Method Details

endCode

void endCode()

addAnnotations

public void addAnnotations(ArrayList<AnnotationData> list)

fillLineTable

public void fillLineTable(List<LineNumberData> list)

fillLocalVariableTable

public void fillLocalVariableTable(boolean isTypeTable,
 List<LocalVariableData> list)

Fills either localVariableTable or localVariableTypeTable according to the boolean parameter isTypeTable

Parameters:

isTypeTable - defines which localVariableTypeTable or localVariableTable is filled

list - list of local_variable_table[i] or local_variable_type_table[i] entries

fillStackMapTable

public void fillStackMapTable(List<StackMapData> list)

trapDecl

CodeAttr.RangePC trapDecl(long pos,
 String name)

beginTrap

void beginTrap(long pos,
 String name)

endTrap

void endTrap(long pos,
 String name)

trapHandler

void trapHandler(long pos,
 String name,
 Indexer type)

checkTraps

void checkTraps()

labelDecl

CodeAttr.Label labelDecl(String name)

LabelDef

public CodeAttr.Label LabelDef(long pos,
 String name)

LabelRef

public CodeAttr.Label LabelRef(String name)

checkLabels

void checkLabels()

LocVarDataDef

public void LocVarDataDef(OpcodeTables.Opcode opcode,
 long position,
 int index,
 ConstCell<?> nameCell,
 ConstCell<?> descriptorCell)

Constructs the local variable nameCell:descriptorCell assigned to the slot index.

Parameters:

opcode - var or type opcode that defines type of filled table -LocalVariableTypeTable or LocalVariableTable

position - scanners' position to navigate where a syntax error happened if any

index - a valid index into the local variable array of the current frame

nameCell - valid unqualified name denoting a local variable

descriptorCell - a field descriptor which encodes a type of local variable in the source program

LocVarDataEnd

public void LocVarDataEnd(OpcodeTables.Opcode opcode,
 short slot,
 long position)

Marks the end of Local Variable (Type) presented in the form endVar index: locVarSlots[slot] = VACANT and sets the Length of the Local Var

Parameters:

slot - The value of the index item is a valid index into the local variable array of the current frame.

position - the position of the scanner

checkLocVars

void checkLocVars(OpcodeTables.Opcode opcode)

getStackMapTable

public StackMapData getStackMapTable()

getNextStackMapTable

public StackMapData getNextStackMapTable()

isTypeCheckingVerifier

public boolean isTypeCheckingVerifier()

addInstr

void addInstr(long mnenoc_pos,
 OpcodeTables.Opcode opcode,
 Indexer arg,
 Object arg2)

getPreviousStackMapEntry

private StackMapData getPreviousStackMapEntry()

attrLength

public int attrLength()

Overrides:

attrLength in class AttrData

write

public void write(CheckedDataOutputStream out)
           throws IOException,
Parser.CompilerError

Specified by:

write in interface DataWriter

Overrides:

write in class AttrData

Throws:

IOException

Parser.CompilerError