Package serp.bytecode
Class GotoInstruction
java.lang.Object
serp.bytecode.CodeEntry
serp.bytecode.Instruction
serp.bytecode.JumpInstruction
serp.bytecode.GotoInstruction
- All Implemented Interfaces:
BCEntity
,InstructionPtr
,VisitAcceptor
An instruction that specifies a position in the code block to jump to.
Examples include
go2, jsr
, etc.-
Field Summary
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprivate void
Calculate our opcode based on the offset size.(package private) int
Return the length in bytes of this opcode, including all arguments.int
Return the number of stack positions this instruction pushes or pops during its execution.void
setOffset
(int offset) Methods inherited from class serp.bytecode.JumpInstruction
acceptVisit, equalsInstruction, getOffset, getTarget, read, read, replaceTarget, setTarget, updateTargets, write
Methods inherited from class serp.bytecode.Instruction
getByteIndex, getClassLoader, getCode, getLineNumber, getLogicalStackChange, getName, getOpcode, getPool, getProject, invalidate, invalidateByteIndexes, isValid, setOpcode
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface serp.bytecode.InstructionPtr
getCode
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Constructor Details
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GotoInstruction
GotoInstruction(Code owner, int opcode)
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Method Details
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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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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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setOffset
public void setOffset(int offset) - Overrides:
setOffset
in classJumpInstruction
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calculateOpcode
private void calculateOpcode()Calculate our opcode based on the offset size.
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