Package serp.bytecode
Class LocalTable
java.lang.Object
serp.bytecode.Attributes
serp.bytecode.Attribute
serp.bytecode.LocalTable
- All Implemented Interfaces:
BCEntity
,InstructionPtr
,VisitAcceptor
- Direct Known Subclasses:
LocalVariableTable
,LocalVariableTypeTable
Code blocks compiled from source have local tables mapping
locals used in opcodes to their names and descriptions.
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionaddLocal()
Add a local to this table.Add a local to this table.Import a local from another method/class.void
clear()
Clear all locals from this table.getCode()
Returns the Code block that owns the Instruction(s) this InstructionPtr points to.(package private) int
Return the length of the bytecode representation of this attribute in bytes, excluding the name index.getLocal
(int local) Return the local with the given locals index, or null if none.Return the local with the given name, or null if none.Local[]
Return all the locals of this method.Local[]
Return all locals with the given name, or empty array if none.protected abstract Local
newLocal()
Create a new element of this table.protected abstract Local[]
newLocalArray
(int size) Create a new array.(package private) void
Read the attribute bytecode from the given stream, up to length bytes, excluding the name index.(package private) void
Copy the information from the given attribute to this one.boolean
removeLocal
(int local) Removes the local with the given locals index from the table.boolean
removeLocal
(String name) Removes the local with the given name from this method.boolean
removeLocal
(Local local) Removes a local from this method.void
replaceTarget
(Instruction oldTarget, Instruction newTarget) Replace the given old, likely invalid, target with a new target.void
Set the locals of this table.void
Use the byte indexes read from the class file to calculate and set references to the target instruction(s) for this ptr.(package private) void
write
(DataOutput out, int length) Write the attribute bytecode to the given stream, up to length bytes, excluding the name index.Methods inherited from class serp.bytecode.Attribute
create, getAttributesHolder, getClassLoader, getName, getNameIndex, getOwner, getPool, getProject, invalidate, isValid
Methods inherited from class serp.bytecode.Attributes
addAttribute, addAttribute, clearAttributes, getAttribute, getAttributes, getAttributes, readAttributes, removeAttribute, removeAttribute, setAttributes, visitAttributes, writeAttributes
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface serp.bytecode.visitor.VisitAcceptor
acceptVisit
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Field Details
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_locals
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Constructor Details
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LocalTable
LocalTable(int nameIndex, Attributes owner)
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Method Details
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getLocals
Return all the locals of this method. -
getLocal
Return the local with the given locals index, or null if none. -
getLocal
Return the local with the given name, or null if none. If multiple locals have the given name, which is returned is undefined. -
getLocals
Return all locals with the given name, or empty array if none. -
setLocals
Set the locals of this table. This method is useful when importing locals from another method. -
addLocal
Import a local from another method/class. Note that the program counter and length from the given local is copied directly, and thus will be incorrect unless this method is the same as the one the local is copied from, or the pc and length are reset. -
addLocal
Add a local to this table. -
newLocal
Create a new element of this table. -
newLocalArray
Create a new array. -
addLocal
Add a local to this table. -
clear
public void clear()Clear all locals from this table. -
removeLocal
public boolean removeLocal(int local) Removes the local with the given locals index from the table.- Returns:
- true if a local was removed, false otherwise
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removeLocal
Removes the local with the given name from this method.- Returns:
- true if a local was removed, false otherwise
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removeLocal
Removes a local from this method. After this method, the local will be invalid, and the result of any operations on it is undefined.- Returns:
- true if a local was removed, false otherwise
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updateTargets
public void updateTargets()Description copied from interface:InstructionPtr
Use the byte indexes read from the class file to calculate and set references to the target instruction(s) for this ptr. This method will be called after the byte code has been read in for the first time and before it is written after modification.- Specified by:
updateTargets
in interfaceInstructionPtr
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replaceTarget
Description copied from interface:InstructionPtr
Replace the given old, likely invalid, target with a new target. The new target Instruction is guaranteed to be in the same code block as this InstructionPtr.- Specified by:
replaceTarget
in interfaceInstructionPtr
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getCode
Description copied from interface:InstructionPtr
Returns the Code block that owns the Instruction(s) this InstructionPtr points to.- Specified by:
getCode
in interfaceInstructionPtr
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getLength
int getLength()Description copied from class:Attribute
Return the length of the bytecode representation of this attribute in bytes, excluding the name index. -
read
Description copied from class:Attribute
Copy the information from the given attribute to this one. Does nothing by default. -
read
Description copied from class:Attribute
Read the attribute bytecode from the given stream, up to length bytes, excluding the name index. Does nothing by default.- Overrides:
read
in classAttribute
- Throws:
IOException
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write
Description copied from class:Attribute
Write the attribute bytecode to the given stream, up to length bytes, excluding the name index. Does nothing by default.- Overrides:
write
in classAttribute
- Throws:
IOException
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