Package serp.bytecode
Class GotoInstruction
- java.lang.Object
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- serp.bytecode.CodeEntry
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- serp.bytecode.Instruction
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- serp.bytecode.JumpInstruction
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- serp.bytecode.GotoInstruction
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- All Implemented Interfaces:
BCEntity
,InstructionPtr
,VisitAcceptor
public class GotoInstruction extends JumpInstruction
An instruction that specifies a position in the code block to jump to. Examples includego2, jsr
, etc.
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Constructor Summary
Constructors Constructor Description GotoInstruction(Code owner, int opcode)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description private void
calculateOpcode()
Calculate our opcode based on the offset size.(package private) int
getLength()
Return the length in bytes of this opcode, including all arguments.int
getStackChange()
Return the number of stack positions this instruction pushes or pops during its execution.void
setOffset(int offset)
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Methods inherited from class serp.bytecode.JumpInstruction
acceptVisit, equalsInstruction, getOffset, getTarget, read, read, replaceTarget, setTarget, updateTargets, write
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Methods inherited from class serp.bytecode.Instruction
getByteIndex, getClassLoader, getCode, getLineNumber, getLogicalStackChange, getName, getOpcode, getPool, getProject, invalidate, invalidateByteIndexes, isValid, setOpcode
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface serp.bytecode.InstructionPtr
getCode
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Constructor Detail
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GotoInstruction
GotoInstruction(Code owner, int opcode)
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Method Detail
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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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