Package serp.bytecode
Class WideInstruction
java.lang.Object
serp.bytecode.CodeEntry
serp.bytecode.Instruction
serp.bytecode.TypedInstruction
serp.bytecode.LocalVariableInstruction
serp.bytecode.WideInstruction
- All Implemented Interfaces:
BCEntity
,VisitAcceptor
The
wide
instruction, which is used to allow other
instructions to index values beyond what they can normally index baed
on the length of their arguments.-
Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
acceptVisit
(BCVisitor visit) Accept a visit from aBCVisitor
, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this one.aload()
Set the type of instruction this wide instruction modifies.astore()
Set the type of instruction this wide instruction modifies.dload()
Set the type of instruction this wide instruction modifies.dstore()
Set the type of instruction this wide instruction modifies.boolean
equalsInstruction
(Instruction other) WideInstructions are equal if the instruction they augment is the same or unset.fload()
Set the type of instruction this wide instruction modifies.fstore()
Set the type of instruction this wide instruction modifies.int
Return the increment for this instruction if it augments IINC, or -1 if unset.int
Return the opcode of the instruction to modify; this will return one of the constants defined inConstants
.(package private) int
Return the length in bytes of this opcode, including all arguments.int
Return the logical number of stack positions changed by this instruction.int
Return the number of stack positions this instruction pushes or pops during its execution.Return the type name for this instruction.iinc()
Set the type of instruction this wide instruction modifies.iload()
Set the type of instruction this wide instruction modifies.istore()
Set the type of instruction this wide instruction modifies.lload()
Set the type of instruction this wide instruction modifies.lstore()
Set the type of instruction this wide instruction modifies.(package private) void
Read the arguments for this opcode from the given stream.(package private) void
read
(Instruction orig) Copy the given instruction data.ret()
Set the type of instruction this wide instruction modifies.setIncrement
(int val) Set the increment on this instruction if it augments IINC.setInstruction
(int opcode) Set the type of instruction this wide instruction modifies.Set the type of instruction this wide instruction modifies.Set the type of this instruction.(package private) void
write
(DataOutput out) Write the arguments for this opcode to the given stream.Methods inherited from class serp.bytecode.LocalVariableInstruction
calculateLocal, calculateOpcode, getLocal, getLocalVariable, getParam, setLocal, setLocalVariable, setParam
Methods inherited from class serp.bytecode.TypedInstruction
getType, getTypeBC, mapType, setType, setType
Methods inherited from class serp.bytecode.Instruction
getByteIndex, getClassLoader, getCode, getLineNumber, getName, getOpcode, getPool, getProject, invalidate, invalidateByteIndexes, isValid, setOpcode
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Field Details
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_mappings
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_ins
private int _ins -
_inc
private int _inc
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Constructor Details
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WideInstruction
WideInstruction(Code owner)
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Method Details
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getLength
int getLength()Description copied from class:Instruction
Return the length in bytes of this opcode, including all arguments. For many opcodes this method relies on an up-to-date byte index.- Overrides:
getLength
in classInstruction
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getStackChange
public int getStackChange()Description copied from class:Instruction
Return the number of stack positions this instruction pushes or pops during its execution.- Overrides:
getStackChange
in classInstruction
- Returns:
- 0 if the stack is not affected by this instruction, a positive number if it pushes onto the stack, and a negative number if it pops from the stack
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getLogicalStackChange
public int getLogicalStackChange()Description copied from class:Instruction
Return the logical number of stack positions changed by this instruction. In other words, ignore weirdness with longs and doubles taking two stack positions.- Overrides:
getLogicalStackChange
in classInstruction
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getTypeName
Description copied from class:TypedInstruction
Return the type name for this instruction. If the type has not been set, this method will return null.- Overrides:
getTypeName
in classLocalVariableInstruction
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setType
Description copied from class:TypedInstruction
Set the type of this instruction. Types that have no direct support will be converted accordingly.- Overrides:
setType
in classLocalVariableInstruction
- Returns:
- this instruction, for method chaining
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getInstruction
public int getInstruction()Return the opcode of the instruction to modify; this will return one of the constants defined inConstants
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setInstruction
Set the type of instruction this wide instruction modifies. -
setInstruction
Set the type of instruction this wide instruction modifies. -
iinc
Set the type of instruction this wide instruction modifies.- Returns:
- this instruction, for method chaining
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ret
Set the type of instruction this wide instruction modifies.- Returns:
- this instruction, for method chaining
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iload
Set the type of instruction this wide instruction modifies.- Returns:
- this instruction, for method chaining
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fload
Set the type of instruction this wide instruction modifies.- Returns:
- this instruction, for method chaining
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aload
Set the type of instruction this wide instruction modifies.- Returns:
- this instruction, for method chaining
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lload
Set the type of instruction this wide instruction modifies.- Returns:
- this instruction, for method chaining
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dload
Set the type of instruction this wide instruction modifies.- Returns:
- this instruction, for method chaining
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istore
Set the type of instruction this wide instruction modifies.- Returns:
- this instruction, for method chaining
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fstore
Set the type of instruction this wide instruction modifies.- Returns:
- this instruction, for method chaining
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astore
Set the type of instruction this wide instruction modifies.- Returns:
- this instruction, for method chaining
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lstore
Set the type of instruction this wide instruction modifies.- Returns:
- this instruction, for method chaining
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dstore
Set the type of instruction this wide instruction modifies.- Returns:
- this instruction, for method chaining
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getIncrement
public int getIncrement()Return the increment for this instruction if it augments IINC, or -1 if unset. -
setIncrement
Set the increment on this instruction if it augments IINC.- Returns:
- this Instruction, for method chaining
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equalsInstruction
WideInstructions are equal if the instruction they augment is the same or unset.- Overrides:
equalsInstruction
in classLocalVariableInstruction
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acceptVisit
Description copied from interface:VisitAcceptor
Accept a visit from aBCVisitor
, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this one.- Specified by:
acceptVisit
in interfaceVisitAcceptor
- Overrides:
acceptVisit
in classInstruction
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read
Description copied from class:Instruction
Copy the given instruction data.- Overrides:
read
in classLocalVariableInstruction
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read
Description copied from class:Instruction
Read the arguments for this opcode from the given stream. This method should be overridden by opcodes that take arguments.- Overrides:
read
in classInstruction
- Throws:
IOException
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write
Description copied from class:Instruction
Write the arguments for this opcode to the given stream. This method should be overridden by opcodes that take arguments.- Overrides:
write
in classInstruction
- Throws:
IOException
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