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<div class="subTitle">com.oracle.truffle.api.nodes</div>
<h2 title="Class RootNode" class="title">Class RootNode</h2>
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<div class="contentContainer">
<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li><a href="../../../../../com/oracle/truffle/api/nodes/Node.html" title="class in com.oracle.truffle.api.nodes">com.oracle.truffle.api.nodes.Node</a></li>
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<li>com.oracle.truffle.api.nodes.RootNode</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../../com/oracle/truffle/api/nodes/NodeInterface.html" title="interface in com.oracle.truffle.api.nodes">NodeInterface</a>, java.lang.Cloneable</dd>
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<pre>public abstract class <span class="strong">RootNode</span>
extends <a href="../../../../../com/oracle/truffle/api/nodes/Node.html" title="class in com.oracle.truffle.api.nodes">Node</a></pre>
<div class="block">A root node is a node with a method to execute it given only a frame as a parameter. Therefore, a
root node can be used to create a call target using
<a href="../../../../../com/oracle/truffle/api/TruffleRuntime.html#createCallTarget(com.oracle.truffle.api.nodes.RootNode)"><code>TruffleRuntime.createCallTarget(RootNode)</code></a>.</div>
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<h3>Nested classes/interfaces inherited from class com.oracle.truffle.api.nodes.<a href="../../../../../com/oracle/truffle/api/nodes/Node.html" title="class in com.oracle.truffle.api.nodes">Node</a></h3>
<code><a href="../../../../../com/oracle/truffle/api/nodes/Node.Child.html" title="annotation in com.oracle.truffle.api.nodes">Node.Child</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.Children.html" title="annotation in com.oracle.truffle.api.nodes">Node.Children</a></code></li>
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<caption><span>Constructors</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colFirst" scope="col">Modifier</th>
<th class="colLast" scope="col">Constructor and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><strong><a href="../../../../../com/oracle/truffle/api/nodes/RootNode.html#RootNode()">RootNode</a></strong>()</code> </td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><strong><a href="../../../../../com/oracle/truffle/api/nodes/RootNode.html#RootNode(com.oracle.truffle.api.source.SourceSection)">RootNode</a></strong>(<a href="../../../../../com/oracle/truffle/api/source/SourceSection.html" title="interface in com.oracle.truffle.api.source">SourceSection</a> sourceSection)</code> </td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><strong><a href="../../../../../com/oracle/truffle/api/nodes/RootNode.html#RootNode(com.oracle.truffle.api.source.SourceSection,%20com.oracle.truffle.api.frame.FrameDescriptor)">RootNode</a></strong>(<a href="../../../../../com/oracle/truffle/api/source/SourceSection.html" title="interface in com.oracle.truffle.api.source">SourceSection</a> sourceSection,
<a href="../../../../../com/oracle/truffle/api/frame/FrameDescriptor.html" title="class in com.oracle.truffle.api.frame">FrameDescriptor</a> frameDescriptor)</code> </td>
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<caption><span>Methods</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../com/oracle/truffle/api/nodes/RootNode.html#applyInstrumentation()">applyInstrumentation</a></strong>()</code>
<div class="block">Apply all registered instances of <a href="../../../../../com/oracle/truffle/api/instrument/ASTProber.html" title="interface in com.oracle.truffle.api.instrument"><code>ASTProber</code></a> to the AST, if any, held by this root
node.</div>
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<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../com/oracle/truffle/api/nodes/Node.html" title="class in com.oracle.truffle.api.nodes">Node</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../com/oracle/truffle/api/nodes/RootNode.html#copy()">copy</a></strong>()</code>
<div class="block">Creates a shallow copy of this node.</div>
</td>
</tr>
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<td class="colFirst"><code>abstract java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../com/oracle/truffle/api/nodes/RootNode.html#execute(com.oracle.truffle.api.frame.VirtualFrame)">execute</a></strong>(<a href="../../../../../com/oracle/truffle/api/frame/VirtualFrame.html" title="interface in com.oracle.truffle.api.frame">VirtualFrame</a> frame)</code>
<div class="block">Executes this function using the specified frame and returns the result value.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../com/oracle/truffle/api/RootCallTarget.html" title="interface in com.oracle.truffle.api">RootCallTarget</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../com/oracle/truffle/api/nodes/RootNode.html#getCallTarget()">getCallTarget</a></strong>()</code> </td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../com/oracle/truffle/api/CompilerOptions.html" title="interface in com.oracle.truffle.api">CompilerOptions</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../com/oracle/truffle/api/nodes/RootNode.html#getCompilerOptions()">getCompilerOptions</a></strong>()</code>
<div class="block">Get compiler options specific to this <code>RootNode</code>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../com/oracle/truffle/api/ExecutionContext.html" title="class in com.oracle.truffle.api">ExecutionContext</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../com/oracle/truffle/api/nodes/RootNode.html#getExecutionContext()">getExecutionContext</a></strong>()</code>
<div class="block">Returns the <a href="../../../../../com/oracle/truffle/api/ExecutionContext.html" title="class in com.oracle.truffle.api"><code>ExecutionContext</code></a> associated with this <code>RootNode</code>.</div>
</td>
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<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../com/oracle/truffle/api/frame/FrameDescriptor.html" title="class in com.oracle.truffle.api.frame">FrameDescriptor</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../com/oracle/truffle/api/nodes/RootNode.html#getFrameDescriptor()">getFrameDescriptor</a></strong>()</code> </td>
</tr>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../com/oracle/truffle/api/nodes/RootNode.html#isCloningAllowed()">isCloningAllowed</a></strong>()</code>
<div class="block">Returns <code>true</code> if this <a href="../../../../../com/oracle/truffle/api/nodes/RootNode.html" title="class in com.oracle.truffle.api.nodes"><code>RootNode</code></a> is allowed to be cloned.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../com/oracle/truffle/api/nodes/RootNode.html#reportLoopCount(int)">reportLoopCount</a></strong>(int count)</code>
<div class="block">Reports the execution count of a loop that is a child of this node.</div>
</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../com/oracle/truffle/api/nodes/RootNode.html#setCallTarget(com.oracle.truffle.api.RootCallTarget)">setCallTarget</a></strong>(<a href="../../../../../com/oracle/truffle/api/RootCallTarget.html" title="interface in com.oracle.truffle.api">RootCallTarget</a> callTarget)</code> </td>
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<h3>Methods inherited from class com.oracle.truffle.api.nodes.<a href="../../../../../com/oracle/truffle/api/nodes/Node.html" title="class in com.oracle.truffle.api.nodes">Node</a></h3>
<code><a href="../../../../../com/oracle/truffle/api/nodes/Node.html#accept(com.oracle.truffle.api.nodes.NodeVisitor)">accept</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#adoptChildren()">adoptChildren</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#assignSourceSection(com.oracle.truffle.api.source.SourceSection)">assignSourceSection</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#atomic(java.util.concurrent.Callable)">atomic</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#atomic(java.lang.Runnable)">atomic</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#clearSourceSection()">clearSourceSection</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#clone()">clone</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#getChildren()">getChildren</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#getCost()">getCost</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#getDebugProperties()">getDebugProperties</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#getDescription()">getDescription</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#getEncapsulatingSourceSection()">getEncapsulatingSourceSection</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#getLanguage()">getLanguage</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#getParent()">getParent</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#getRootNode()">getRootNode</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#getSourceSection()">getSourceSection</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#insert(T)">insert</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#insert(T[])">insert</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#isReplaceable()">isReplaceable</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#onAdopt()">onAdopt</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#onReplace(com.oracle.truffle.api.nodes.Node,%20java.lang.CharSequence)">onReplace</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#replace(T)">replace</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#replace(T,%20java.lang.CharSequence)">replace</a>, <a href="../../../../../com/oracle/truffle/api/nodes/Node.html#toString()">toString</a></code></li>
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<h3>Methods inherited from class java.lang.Object</h3>
<code>equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</code></li>
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<h4>RootNode</h4>
<pre>protected RootNode()</pre>
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<pre>protected RootNode(<a href="../../../../../com/oracle/truffle/api/source/SourceSection.html" title="interface in com.oracle.truffle.api.source">SourceSection</a> sourceSection)</pre>
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<pre>protected RootNode(<a href="../../../../../com/oracle/truffle/api/source/SourceSection.html" title="interface in com.oracle.truffle.api.source">SourceSection</a> sourceSection,
<a href="../../../../../com/oracle/truffle/api/frame/FrameDescriptor.html" title="class in com.oracle.truffle.api.frame">FrameDescriptor</a> frameDescriptor)</pre>
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<h4>copy</h4>
<pre>public <a href="../../../../../com/oracle/truffle/api/nodes/Node.html" title="class in com.oracle.truffle.api.nodes">Node</a> copy()</pre>
<div class="block"><strong>Description copied from class: <code><a href="../../../../../com/oracle/truffle/api/nodes/Node.html#copy()">Node</a></code></strong></div>
<div class="block">Creates a shallow copy of this node.</div>
<dl>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="../../../../../com/oracle/truffle/api/nodes/Node.html#copy()">copy</a></code> in class <code><a href="../../../../../com/oracle/truffle/api/nodes/Node.html" title="class in com.oracle.truffle.api.nodes">Node</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the new copy</dd></dl>
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<pre>public boolean isCloningAllowed()</pre>
<div class="block">Returns <code>true</code> if this <a href="../../../../../com/oracle/truffle/api/nodes/RootNode.html" title="class in com.oracle.truffle.api.nodes"><code>RootNode</code></a> is allowed to be cloned. The runtime
system might decide to create deep copies of the <a href="../../../../../com/oracle/truffle/api/nodes/RootNode.html" title="class in com.oracle.truffle.api.nodes"><code>RootNode</code></a> in order to gather context
sensitive profiling feedback. The default implementation returns <code>false</code>. Guest
language specific implementations may want to return <code>true</code> here to indicate that
gathering call site specific profiling information might make sense for this <a href="../../../../../com/oracle/truffle/api/nodes/RootNode.html" title="class in com.oracle.truffle.api.nodes"><code>RootNode</code></a>
.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd><code>true</code> if cloning is allowed else <code>false</code>.</dd></dl>
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<pre>public final void reportLoopCount(int count)</pre>
<div class="block">Reports the execution count of a loop that is a child of this node. The optimization
heuristics can use the loop count to guide compilation and inlining.</div>
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<h4>execute</h4>
<pre>public abstract java.lang.Object execute(<a href="../../../../../com/oracle/truffle/api/frame/VirtualFrame.html" title="interface in com.oracle.truffle.api.frame">VirtualFrame</a> frame)</pre>
<div class="block">Executes this function using the specified frame and returns the result value.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>frame</code> - the frame of the currently executing guest language method</dd>
<dt><span class="strong">Returns:</span></dt><dd>the value of the execution</dd></dl>
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<h4>getCallTarget</h4>
<pre>public final <a href="../../../../../com/oracle/truffle/api/RootCallTarget.html" title="interface in com.oracle.truffle.api">RootCallTarget</a> getCallTarget()</pre>
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<h4>getFrameDescriptor</h4>
<pre>public final <a href="../../../../../com/oracle/truffle/api/frame/FrameDescriptor.html" title="class in com.oracle.truffle.api.frame">FrameDescriptor</a> getFrameDescriptor()</pre>
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<h4>setCallTarget</h4>
<pre>public final void setCallTarget(<a href="../../../../../com/oracle/truffle/api/RootCallTarget.html" title="interface in com.oracle.truffle.api">RootCallTarget</a> callTarget)</pre>
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<h4>getExecutionContext</h4>
<pre>public <a href="../../../../../com/oracle/truffle/api/ExecutionContext.html" title="class in com.oracle.truffle.api">ExecutionContext</a> getExecutionContext()</pre>
<div class="block">Returns the <a href="../../../../../com/oracle/truffle/api/ExecutionContext.html" title="class in com.oracle.truffle.api"><code>ExecutionContext</code></a> associated with this <code>RootNode</code>. This allows
the correct <code>ExecutionContext</code> to be determined for a <code>RootNode</code> (and
so also for a <a href="../../../../../com/oracle/truffle/api/RootCallTarget.html" title="interface in com.oracle.truffle.api"><code>RootCallTarget</code></a> and a <a href="../../../../../com/oracle/truffle/api/frame/FrameInstance.html" title="interface in com.oracle.truffle.api.frame"><code>FrameInstance</code></a> obtained from the call
stack) without prior knowledge of the language it has come from.
Used for instance to determine the language of a <code>RootNode<code>:
<pre>
<code>
rootNode.getExecutionContext().getLanguageShortName();
</code> </pre>
Returns <code>null</code> by default.</div>
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<h4>getCompilerOptions</h4>
<pre>public <a href="../../../../../com/oracle/truffle/api/CompilerOptions.html" title="interface in com.oracle.truffle.api">CompilerOptions</a> getCompilerOptions()</pre>
<div class="block">Get compiler options specific to this <code>RootNode</code>.</div>
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<h4>applyInstrumentation</h4>
<pre>public void applyInstrumentation()</pre>
<div class="block">Apply all registered instances of <a href="../../../../../com/oracle/truffle/api/instrument/ASTProber.html" title="interface in com.oracle.truffle.api.instrument"><code>ASTProber</code></a> to the AST, if any, held by this root
node. This can only be done once the AST is complete, notably once all parent pointers are
correctly assigned. But it also must be done before any AST cloning or execution.
<p>
If this is not done, then the AST will not be subject to debugging or any other
instrumentation-supported tooling.
<p>
Implementations should ensure that instrumentation is never applied more than once to an AST,
as this is not guaranteed to be error-free.</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../com/oracle/truffle/api/instrument/Probe.html#registerASTProber(com.oracle.truffle.api.instrument.ASTProber)"><code>Probe.registerASTProber(com.oracle.truffle.api.instrument.ASTProber)</code></a></dd></dl>
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