com.oracle.graal.hotspot.nodes

Class BeginLockScopeNode

java.lang.Object

com.oracle.graal.graph.Node

com.oracle.graal.nodes.ValueNode

com.oracle.graal.nodes.FixedNode

com.oracle.graal.nodes.FixedWithNextNode

com.oracle.graal.nodes.AbstractStateSplit

com.oracle.graal.nodes.memory.AbstractMemoryCheckpoint

com.oracle.graal.hotspot.nodes.BeginLockScopeNode

All Implemented Interfaces:

NodeInterface, MonitorEnter, MemoryCheckpoint, MemoryCheckpoint.Single, MemoryNode, LIRLowerable, NodeWithState, StateSplit, Cloneable, Formattable, KindProvider

public final class BeginLockScopeNode
extends AbstractMemoryCheckpoint
implements LIRLowerable, MonitorEnter, MemoryCheckpoint.Single

Intrinsic for opening a scope binding a stack-based lock with an object. A lock scope must be closed with an EndLockScopeNode. The frame state after this node denotes that the object is locked (ensuring the GC sees and updates the object) so it must come after any null pointer check on the object.

Nested Class Summary

Nested classes/interfaces inherited from class com.oracle.graal.graph.Node

Node.ConstantNodeParameter, Node.InjectedNodeParameter, Node.Input, Node.NodeIntrinsic, Node.OptionalInput, Node.Successor, Node.ValueNumberable

Nested classes/interfaces inherited from interface com.oracle.graal.nodes.memory.MemoryCheckpoint

MemoryCheckpoint.Multi, MemoryCheckpoint.Single, MemoryCheckpoint.TypeAssertion

Field Summary

Fields

Modifier and Type	Field and Description
protected int	lockDepth
static NodeClass<BeginLockScopeNode>	TYPE

Fields inherited from class com.oracle.graal.nodes.AbstractStateSplit

stateAfter

Fields inherited from class com.oracle.graal.nodes.FixedWithNextNode

next

Fields inherited from class com.oracle.graal.nodes.ValueNode

stamp

Fields inherited from class com.oracle.graal.graph.Node

NODE_LIST, NOT_ITERABLE, USE_UNSAFE_TO_CLONE, WithAllEdges, WithNoEdges, WithOnlyInputEdges, WithOnlySucessorEdges

Constructor Summary

Constructors

Constructor and Description
BeginLockScopeNode(WordTypes wordTypes, int lockDepth)

Method Summary

Modifier and Type	Method and Description
static Word	beginLockScope(int lockDepth)
void	generate(NodeLIRBuilderTool gen)
LocationIdentity	getLocationIdentity() This method is used to determine which memory location is killed by this node.
boolean	hasSideEffect() Determines if this node has a side-effect.

Methods inherited from class com.oracle.graal.nodes.AbstractStateSplit

setStateAfter, stateAfter

Methods inherited from class com.oracle.graal.nodes.FixedWithNextNode

asNode, next, setNext

Methods inherited from class com.oracle.graal.nodes.FixedNode

verify

Methods inherited from class com.oracle.graal.nodes.ValueNode

asConstant, asJavaConstant, getKind, graph, inferStamp, isAllowedUsageType, isConstant, isConstantPredicate, isNullConstant, setStamp, stamp, updateStamp

Methods inherited from class com.oracle.graal.graph.Node

acceptInputs, acceptSuccessors, afterClone, assertFalse, assertTrue, cfgPredecessors, cfgSuccessors, clearInputs, clearSuccessors, copyWithInputs, copyWithInputs, equals, fail, formatTo, getDebugProperties, getDebugProperties, getId, getNodeClass, getUsageAt, getUsageCount, hashCode, hasNoUsages, hasUsages, inputs, isAlive, isDeleted, markDeleted, modCount, newIdentityMap, newIdentityMap, newIdentityMap, newMap, newMap, newMap, newSet, newSet, predecessor, pushInputs, removeUsage, replaceAndDelete, replaceAtMatchingUsages, replaceAtPredecessor, replaceAtUsages, replaceAtUsages, replaceAtUsages, replaceFirstInput, replaceFirstSuccessor, safeDelete, simplify, successors, toString, toString, updatePredecessor, updateUsages, updateUsagesInterface, usages, valueEquals, verifyEdges, verifyInputs

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.oracle.graal.nodes.memory.MemoryCheckpoint

asNode

Methods inherited from interface com.oracle.graal.nodes.StateSplit

asNode

Methods inherited from interface com.oracle.graal.nodes.spi.NodeWithState

states

Field Detail

TYPE

public static final NodeClass<BeginLockScopeNode> TYPE

lockDepth

protected int lockDepth

Constructor Detail

BeginLockScopeNode

public BeginLockScopeNode(WordTypes wordTypes,
                          int lockDepth)

Method Detail

hasSideEffect

public boolean hasSideEffect()

Description copied from interface: StateSplit

Determines if this node has a side-effect. Such nodes cannot be safely re-executed because they modify state which is visible to other threads or modify state beyond what is captured in FrameState nodes.

Specified by:

hasSideEffect in interface StateSplit

Overrides:

hasSideEffect in class AbstractStateSplit

getLocationIdentity

public LocationIdentity getLocationIdentity()

Description copied from interface: MemoryCheckpoint.Single

This method is used to determine which memory location is killed by this node. Returning the special value LocationIdentity.any() will kill all memory locations.

Specified by:

getLocationIdentity in interface MemoryCheckpoint.Single

Returns:

the identity of the location killed by this node.

generate

public void generate(NodeLIRBuilderTool gen)

Specified by:

generate in interface LIRLowerable

beginLockScope

public static Word beginLockScope(int lockDepth)