org.graalvm.compiler.nodes.java

Class MonitorIdNode

java.lang.Object

org.graalvm.compiler.graph.Node

org.graalvm.compiler.nodes.ValueNode

org.graalvm.compiler.nodes.java.MonitorIdNode

All Implemented Interfaces:

Cloneable, Formattable, IterableNodeType, LIRLowerable, ValueNodeInterface

public class MonitorIdNode
extends ValueNode
implements IterableNodeType, LIRLowerable

This node describes one locking scope; it ties the monitor enter, monitor exit and the frame states together. It is thus referenced from the MonitorEnterNode, from the MonitorExitNode and from the FrameState.

Nested Class Summary

Nested classes/interfaces inherited from class org.graalvm.compiler.graph.Node

Node.ConstantNodeParameter, Node.EdgeVisitor, Node.IndirectCanonicalization, Node.InjectedNodeParameter, Node.Input, Node.NodeInsertionStackTrace, Node.NodeIntrinsic, Node.NodeIntrinsicFactory, Node.OptionalInput, Node.Successor, Node.ValueNumberable

Field Summary

Fields

Modifier and Type	Field and Description
protected int	bci We use the BCI as an identity for balanced locking.
protected boolean	eliminated
protected int	lockDepth
protected boolean	multipleEntry Specifies if this is a monitor that was entered on disjoint control flow paths.
static NodeClass<MonitorIdNode>	TYPE

Fields inherited from class org.graalvm.compiler.nodes.ValueNode

EMPTY_ARRAY, stamp

Fields inherited from class org.graalvm.compiler.graph.Node

NODE_LIST, NOT_ITERABLE, TRACK_CREATION_POSITION, WithAllEdges, WithNoEdges, WithOnlyInputEdges, WithOnlySucessorEdges

Constructor Summary

Constructors

Modifier	Constructor and Description
	MonitorIdNode(int lockDepth)
	MonitorIdNode(int lockDepth, int bci)
	MonitorIdNode(int lockDepth, int bci, boolean multipleEntry)
protected	MonitorIdNode(NodeClass<? extends MonitorIdNode> c, int lockDepth, int bci)

Method Summary

Modifier and Type	Method and Description
void	generate(NodeLIRBuilderTool generator)
int	getBci()
int	getLockDepth()
boolean	isEliminated()
boolean	isMultipleEntry() Indicates that the associated monitor operations might have multiple distinct monitorenter bytecodes for different objects.
static boolean	monitorIdentityEquals(MonitorIdNode m1, MonitorIdNode m2) Determine if the two monitor ID nodes represent locking of the same bytecode location.
void	setEliminated()
void	setLockDepth(int lockDepth)
void	setMultipleEntry()

Methods inherited from class org.graalvm.compiler.nodes.ValueNode

asConstant, asJavaConstant, asNode, asSerializableConstant, checkReplaceAtUsagesInvariants, getStackKind, graph, hasUsagesOtherThan, inferStamp, isAllowedUsageType, isConstant, isConstantPredicate, isDefaultConstant, isIllegalConstant, isJavaConstant, isNullConstant, isSerializableConstant, recursivelyDataFlowEqualsUpTo, setStamp, stamp, updateStamp, updateUsagesInterface

Methods inherited from class org.graalvm.compiler.graph.Node

afterClone, applyInputs, applySuccessors, assertFalse, assertTrue, cfgPredecessors, cfgSuccessors, clearInputs, clearNodeSourcePosition, clearSuccessors, copyWithInputs, copyWithInputs, dataFlowEquals, dynamicNodeSizeEstimate, estimatedNodeCycles, estimatedNodeSize, fail, formatTo, getCreationPosition, getDebug, getDebugProperties, getDebugProperties, getInsertionPosition, getNodeClass, getNodeSourcePosition, getOptions, getUsageCount, hasExactlyOneUsage, hashCode, hasMoreThanOneUsage, hasNoUsages, hasOnlyUsagesOfType, hasUsages, hasUsagesOfType, inputPositions, inputs, isAlive, isDeleted, isUnregistered, markDeleted, maybeNotifyZeroUsages, modCount, predecessor, pushInputs, removeUsage, replaceAllInputs, replaceAndDelete, replaceAtAllUsages, replaceAtMatchingUsages, replaceAtPredecessor, replaceAtUsages, replaceAtUsages, replaceAtUsages, replaceAtUsages, replaceAtUsages, replaceAtUsagesAndDelete, replaceAtUsagesAndDelete, replaceFirstInput, replaceFirstSuccessor, safeDelete, setCreationPosition, setInsertionPosition, setNodeSourcePosition, singleUsage, successorPositions, successors, toString, toString, updateNodeSourcePosition, updatePredecessor, updateUsages, usages, valueEquals, verify, verifyEdges, verifyInputs, verifySourcePosition, withNodeSourcePosition

Methods inherited from class java.lang.Object

clone, equals, getClass, notify, notifyAll, wait, wait, wait

Field Detail

TYPE

public static final NodeClass<MonitorIdNode> TYPE

lockDepth

protected int lockDepth

eliminated

protected boolean eliminated

bci

protected final int bci

We use the BCI as an identity for balanced locking.

multipleEntry

protected boolean multipleEntry

Specifies if this is a monitor that was entered on disjoint control flow paths.

Constructor Detail

MonitorIdNode

public MonitorIdNode(int lockDepth,
                     int bci)

MonitorIdNode

public MonitorIdNode(int lockDepth,
                     int bci,
                     boolean multipleEntry)

MonitorIdNode

public MonitorIdNode(int lockDepth)

MonitorIdNode

protected MonitorIdNode(NodeClass<? extends MonitorIdNode> c,
                        int lockDepth,
                        int bci)

Method Detail

getBci

public int getBci()

setMultipleEntry

public void setMultipleEntry()

isMultipleEntry

public boolean isMultipleEntry()

Indicates that the associated monitor operations might have multiple distinct monitorenter bytecodes for different objects. This violates some assumptions about well formed monitor operations and may inhibit some high level lock optimizations.

getLockDepth

public int getLockDepth()

setLockDepth

public void setLockDepth(int lockDepth)

isEliminated

public boolean isEliminated()

setEliminated

public void setEliminated()

generate

public void generate(NodeLIRBuilderTool generator)

Specified by:

generate in interface LIRLowerable

monitorIdentityEquals

public static boolean monitorIdentityEquals(MonitorIdNode m1,
                                            MonitorIdNode m2)

Determine if the two monitor ID nodes represent locking of the same bytecode location.