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jdk.internal.org.objectweb.asm

pack-priv final Class Edge

extends Object
Class Inheritance
An edge in the control flow graph of a method. Each node of this graph is a basic block, represented with the Label corresponding to its first instruction. Each edge goes from one node to another, i.e. from one basic block to another (called the predecessor and successor blocks, respectively). An edge corresponds either to a jump or ret instruction or to an exception handler.
Author
Eric Bruneton
See Also
Label

Field Summary

Modifier and TypeField and Description
pack-priv static final int
EXCEPTION

A control flow graph edge corresponding to an exception handler.

pack-priv final int
info

Information about this control flow graph edge.

pack-priv static final int
JUMP

A control flow graph edge corresponding to a jump or ret instruction.

pack-priv Edge
nextEdge

The next edge in the list of outgoing edges of a basic block.

pack-priv final Label
successor

The successor block of this control flow graph edge.

Constructor Summary

AccessConstructor and Description
pack-priv
Edge(final int
see info.
info, final Label
see successor.
successor, final Edge
see nextEdge.
nextEdge)

Constructs a new Edge.

Method Summary

Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Field Detail

EXCEPTIONback to summary
pack-priv static final int EXCEPTION

A control flow graph edge corresponding to an exception handler. Only used with ClassWriter#COMPUTE_MAXS.

infoback to summary
pack-priv final int info

Information about this control flow graph edge.

  • If ClassWriter#COMPUTE_MAXS is used, this field contains either a stack size delta (for an edge corresponding to a jump instruction), or the value EXCEPTION (for an edge corresponding to an exception handler). The stack size delta is the stack size just after the jump instruction, minus the stack size at the beginning of the predecessor basic block, i.e. the one containing the jump instruction.
  • If ClassWriter#COMPUTE_FRAMES is used, this field contains either the value JUMP (for an edge corresponding to a jump instruction), or the index, in the ClassWriter type table, of the exception type that is handled (for an edge corresponding to an exception handler).
JUMPback to summary
pack-priv static final int JUMP

A control flow graph edge corresponding to a jump or ret instruction. Only used with ClassWriter#COMPUTE_FRAMES.

nextEdgeback to summary
pack-priv Edge nextEdge

The next edge in the list of outgoing edges of a basic block. See Label#outgoingEdges.

successorback to summary
pack-priv final Label successor

The successor block of this control flow graph edge.

Constructor Detail

Edgeback to summary
pack-priv Edge(final int info, final Label successor, final Edge nextEdge)

Constructs a new Edge.

Parameters
info:int

see info.

successor:Label

see successor.

nextEdge:Edge

see nextEdge.