com.oracle.truffle.api.impl

Class DefaultTruffleRuntime

java.lang.Object

com.oracle.truffle.api.impl.DefaultTruffleRuntime

All Implemented Interfaces:

TruffleRuntime

public final class DefaultTruffleRuntime
extends java.lang.Object
implements TruffleRuntime

Default implementation of the Truffle runtime if the virtual machine does not provide a better performing alternative.

This is an implementation-specific class. Do not use or instantiate it. Instead, use Truffle.getRuntime() to retrieve the current TruffleRuntime.

Constructor Summary

Constructors

Constructor and Description
DefaultTruffleRuntime()

Method Summary

Methods

Modifier and Type	Method and Description
Assumption	createAssumption() Creates a new assumption object that can be checked and invalidated.
Assumption	createAssumption(java.lang.String name) Creates a new assumption object with a given name that can be checked and invalidated.
RootCallTarget	createCallTarget(RootNode rootNode) Creates a new call target for a given root node.
CompilerOptions	createCompilerOptions() Creates an object which allows you to test for support of and set options specific for this runtime.
DirectCallNode	createDirectCallNode(CallTarget target) Creates a new runtime specific version of DirectCallNode.
IndirectCallNode	createIndirectCallNode() Creates a new runtime specific version of IndirectCallNode.
LoopNode	createLoopNode(RepeatingNode repeating) Experimental API.
MaterializedFrame	createMaterializedFrame(java.lang.Object[] arguments) Creates a new materialized frame object that can be used to store values.
MaterializedFrame	createMaterializedFrame(java.lang.Object[] arguments, FrameDescriptor frameDescriptor) Creates a new materialized frame object with the given frame descriptor that can be used to store values.
VirtualFrame	createVirtualFrame(java.lang.Object[] arguments, FrameDescriptor frameDescriptor) Creates a new virtual frame object that can be used to store values and is potentially optimizable by the runtime.
FrameInstance	getCallerFrame() Accesses the caller frame.
java.util.Collection<RootCallTarget>	getCallTargets() Returns a list of all still referenced RootCallTarget instances that were created using TruffleRuntime.createCallTarget(RootNode).
<T> T	getCapability(java.lang.Class<T> capability) Requests a capability from the runtime.
FrameInstance	getCurrentFrame() Accesses the current frame, i.e., the frame of the closest CallTarget.
java.lang.String	getName() Name describing this runtime implementation for debugging purposes.
<T> T	iterateFrames(FrameInstanceVisitor<T> visitor) Accesses the current stack, i.e., the contents of the Frames and the associated CallTargets.
void	notifyTransferToInterpreter() Internal API method.
void	popFrame()
void	pushFrame(FrameInstance frame)
FrameInstance	setCurrentFrame(FrameInstance newValue)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DefaultTruffleRuntime

public DefaultTruffleRuntime()

Method Detail

getName

public java.lang.String getName()

Description copied from interface: TruffleRuntime

Name describing this runtime implementation for debugging purposes.

Specified by:

getName in interface TruffleRuntime

Returns:

the name as a String

createCallTarget

public RootCallTarget createCallTarget(RootNode rootNode)

Description copied from interface: TruffleRuntime

Creates a new call target for a given root node.

Specified by:

createCallTarget in interface TruffleRuntime

Parameters:

rootNode - the root node whose RootNode.execute(com.oracle.truffle.api.frame.VirtualFrame) method represents the entry point

Returns:

the new call target object

createDirectCallNode

public DirectCallNode createDirectCallNode(CallTarget target)

Description copied from interface: TruffleRuntime

Creates a new runtime specific version of DirectCallNode.

Specified by:

createDirectCallNode in interface TruffleRuntime

Parameters:

target - the direct CallTarget to call

Returns:

the new call node

createIndirectCallNode

public IndirectCallNode createIndirectCallNode()

Description copied from interface: TruffleRuntime

Creates a new runtime specific version of IndirectCallNode.

Specified by:

createIndirectCallNode in interface TruffleRuntime

Returns:

the new call node

createVirtualFrame

public VirtualFrame createVirtualFrame(java.lang.Object[] arguments,
                              FrameDescriptor frameDescriptor)

Description copied from interface: TruffleRuntime

Creates a new virtual frame object that can be used to store values and is potentially optimizable by the runtime.

Specified by:

createVirtualFrame in interface TruffleRuntime

Returns:

the newly created virtual frame object

createMaterializedFrame

public MaterializedFrame createMaterializedFrame(java.lang.Object[] arguments)

Description copied from interface: TruffleRuntime

Creates a new materialized frame object that can be used to store values.

Specified by:

createMaterializedFrame in interface TruffleRuntime

Returns:

the newly created materialized frame object

createMaterializedFrame

public MaterializedFrame createMaterializedFrame(java.lang.Object[] arguments,
                                        FrameDescriptor frameDescriptor)

Description copied from interface: TruffleRuntime

Creates a new materialized frame object with the given frame descriptor that can be used to store values.

Specified by:

createMaterializedFrame in interface TruffleRuntime

frameDescriptor - the frame descriptor describing this frame's values

Returns:

the newly created materialized frame object

createCompilerOptions

public CompilerOptions createCompilerOptions()

Description copied from interface: TruffleRuntime

Creates an object which allows you to test for support of and set options specific for this runtime.

Specified by:

createCompilerOptions in interface TruffleRuntime

Returns:

the newly created compiler options object

createAssumption

public Assumption createAssumption()

Description copied from interface: TruffleRuntime

Creates a new assumption object that can be checked and invalidated.

Specified by:

createAssumption in interface TruffleRuntime

Returns:

the newly created assumption object

createAssumption

public Assumption createAssumption(java.lang.String name)

Description copied from interface: TruffleRuntime

Creates a new assumption object with a given name that can be checked and invalidated.

Specified by:

createAssumption in interface TruffleRuntime

Parameters:

name - the name for the new assumption

Returns:

the newly created assumption object

setCurrentFrame

public FrameInstance setCurrentFrame(FrameInstance newValue)

pushFrame

public void pushFrame(FrameInstance frame)

popFrame

public void popFrame()

iterateFrames

public <T> T iterateFrames(FrameInstanceVisitor<T> visitor)

Description copied from interface: TruffleRuntime

Accesses the current stack, i.e., the contents of the Frames and the associated CallTargets. Iteration starts at the caller frame, i.e., it does not include the current frame. Iteration continues as long as FrameInstanceVisitor.visitFrame(com.oracle.truffle.api.frame.FrameInstance), which is invoked for every FrameInstance, returns null. Any non-null result of the visitor indicates that frame iteration should stop.

Specified by:

iterateFrames in interface TruffleRuntime

Parameters:

visitor - the visitor that is called for every matching frame.

Returns:

the last result returned by the visitor (which is non-null to indicate that iteration should stop), or null if the whole stack was iterated.

getCallerFrame

public FrameInstance getCallerFrame()

Description copied from interface: TruffleRuntime

Accesses the caller frame. This is a convenience method that returns the first frame that is passed to the visitor of TruffleRuntime.iterateFrames(com.oracle.truffle.api.frame.FrameInstanceVisitor<T>).

Specified by:

getCallerFrame in interface TruffleRuntime

getCallTargets

public java.util.Collection<RootCallTarget> getCallTargets()

Description copied from interface: TruffleRuntime

Returns a list of all still referenced RootCallTarget instances that were created using TruffleRuntime.createCallTarget(RootNode).

Specified by:

getCallTargets in interface TruffleRuntime

getCurrentFrame

public FrameInstance getCurrentFrame()

Description copied from interface: TruffleRuntime

Accesses the current frame, i.e., the frame of the closest CallTarget. It is important to note that this FrameInstance supports only slow path access.

Specified by:

getCurrentFrame in interface TruffleRuntime

getCapability

public <T> T getCapability(java.lang.Class<T> capability)

Description copied from interface: TruffleRuntime

Requests a capability from the runtime.

Specified by:

getCapability in interface TruffleRuntime

Parameters:

capability - the type of the interface representing the capability

Returns:

an implementation of the capability or null if the runtime does not offer it

notifyTransferToInterpreter

public void notifyTransferToInterpreter()

Description copied from interface: TruffleRuntime

Internal API method. Do not use.

Specified by:

notifyTransferToInterpreter in interface TruffleRuntime

createLoopNode

public LoopNode createLoopNode(RepeatingNode repeating)

Description copied from interface: TruffleRuntime

Experimental API. May change without notice.

Specified by:

createLoopNode in interface TruffleRuntime