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Truffle is a multi-language framework for executing dynamic languages
that achieves high performance when combined with Graal.
/*
* Copyright (c) 2012, 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* The Universal Permissive License (UPL), Version 1.0
*
* Subject to the condition set forth below, permission is hereby granted to any
* person obtaining a copy of this software, associated documentation and/or
* data (collectively the "Software"), free of charge and under any and all
* copyright rights in the Software, and any and all patent rights owned or
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* unmodified Software as contributed to or provided by such licensor, or (ii)
* the Larger Works (as defined below), to deal in both
*
* (a) the Software, and
*
* (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
* one is included with the Software each a "Larger Work" to which the Software
* is contributed by such licensors),
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* without restriction, including without limitation the rights to copy, create
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* Software and the Larger Work(s), and to sublicense the foregoing rights on
* either these or other terms.
*
* This license is subject to the following condition:
*
* The above copyright notice and either this complete permission notice or at a
* minimum a reference to the UPL must be included in all copies or substantial
* portions of the Software.
*
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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package com.oracle.truffle.api;
import com.oracle.truffle.api.frame.Frame;
import com.oracle.truffle.api.frame.FrameDescriptor;
import com.oracle.truffle.api.frame.FrameInstance;
import com.oracle.truffle.api.frame.FrameInstanceVisitor;
import com.oracle.truffle.api.frame.MaterializedFrame;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.nodes.DirectCallNode;
import com.oracle.truffle.api.nodes.IndirectCallNode;
import com.oracle.truffle.api.nodes.LoopNode;
import com.oracle.truffle.api.nodes.RepeatingNode;
import com.oracle.truffle.api.nodes.RootNode;
/**
* Interface representing a Truffle runtime object. The runtime is responsible for creating call
* targets and performing optimizations for them.
*
* @since 0.8 or earlier
*/
public interface TruffleRuntime {
/**
* Name describing this runtime implementation for debugging purposes.
*
* @return the name as a String
* @since 0.8 or earlier
*/
String getName();
/**
* Creates a new call target for a given root node.
*
* @param rootNode the root node whose
* {@link RootNode#execute(com.oracle.truffle.api.frame.VirtualFrame)} method
* represents the entry point
* @return the new call target object
* @since 0.8 or earlier
*/
RootCallTarget createCallTarget(RootNode rootNode);
/**
* Creates a new runtime specific version of {@link DirectCallNode}.
*
* @param target the direct {@link CallTarget} to call
* @return the new call node
* @since 0.8 or earlier
*/
DirectCallNode createDirectCallNode(CallTarget target);
/**
* Creates a new loop node with an implementation provided by a Truffle runtime implementation.
* Using Truffle loop nodes allows the runtime to do additional optimizations such as on stack
* replacement for loops.
*
* @see LoopNode usage example
* @since 0.8 or earlier
*/
LoopNode createLoopNode(RepeatingNode body);
/**
* Creates a new runtime specific version of {@link IndirectCallNode}.
*
* @return the new call node
* @since 0.8 or earlier
*/
IndirectCallNode createIndirectCallNode();
/**
* Creates a new assumption object that can be checked and invalidated.
*
* @return the newly created assumption object
* @since 0.8 or earlier
*/
Assumption createAssumption();
/**
* Creates a new assumption object with a given name that can be checked and invalidated.
*
* @param name the name for the new assumption
* @return the newly created assumption object
* @since 0.8 or earlier
*/
Assumption createAssumption(String name);
/**
* Creates a new virtual frame object that can be used to store values and is potentially
* optimizable by the runtime.
*
* @return the newly created virtual frame object
* @since 0.8 or earlier
*/
VirtualFrame createVirtualFrame(Object[] arguments, FrameDescriptor frameDescriptor);
/**
* Creates a new materialized frame object that can be used to store values.
*
* @return the newly created materialized frame object
* @since 0.8 or earlier
*/
MaterializedFrame createMaterializedFrame(Object[] arguments);
/**
* Creates a new materialized frame object with the given frame descriptor that can be used to
* store values.
*
* @param frameDescriptor the frame descriptor describing this frame's values
* @return the newly created materialized frame object
* @since 0.8 or earlier
*/
MaterializedFrame createMaterializedFrame(Object[] arguments, FrameDescriptor frameDescriptor);
/**
* Creates an object which allows you to test for support of and set options specific for this
* runtime.
*
* @return the newly created compiler options object
* @since 0.8 or earlier
*/
CompilerOptions createCompilerOptions();
/**
* Accesses the current stack, i.e., the contents of the {@link Frame}s and the associated
* {@link CallTarget}s. Iteration starts at the current frame.
*
* Iteration continues as long as {@link FrameInstanceVisitor#visitFrame}, which is invoked for
* every {@link FrameInstance}, returns null. Any non-null result of the visitor indicates that
* frame iteration should stop.
*
* To get possible asynchronous stack frames, use
* {@link TruffleStackTrace#getAsynchronousStackTrace(CallTarget, Frame)} and provide call
* target and frame from the last {@link FrameInstance}.
*
* @param visitor the visitor that is called for every matching frame.
* @return 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.
* @since 0.8 or earlier
*/
T iterateFrames(FrameInstanceVisitor visitor);
/**
* Accesses the caller frame. This is a convenience method that returns the first frame that is
* passed to the visitor of {@link #iterateFrames}.
*
* @since 0.8 or earlier
*/
FrameInstance getCallerFrame();
/**
* Accesses the current frame, i.e., the frame of the closest {@link CallTarget}. It is
* important to note that this {@link FrameInstance} supports only slow path access.
*
* @since 0.8 or earlier
*/
FrameInstance getCurrentFrame();
/**
* Requests a capability from the runtime.
*
* @param capability the type of the interface representing the capability
* @return an implementation of the capability or {@code null} if the runtime does not offer it
* @since 0.8 or earlier
*/
T getCapability(Class capability);
/**
* Internal API method. Do not use.
*
* @since 0.8 or earlier
*/
void notifyTransferToInterpreter();
/**
* Whether or not the {@link TruffleRuntime} implementation can or wants to use gathered
* profiling information Truffle compilation. If this method returns false then all
* profiles in the {@link com.oracle.truffle.api.utilities} package are returning void
* implementations. If it returns true then all implementations gather profilinig
* information.
*
* @since 0.8 or earlier
*/
boolean isProfilingEnabled();
}