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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
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*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package com.oracle.truffle.api.instrumentation;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import com.oracle.truffle.api.TruffleLanguage;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.api.nodes.RootNode;
import com.oracle.truffle.api.source.Source;
import com.oracle.truffle.api.source.SourceSection;
/**
* Provides the capabilities to attach {@link ExecutionEventNodeFactory} and
* {@link ExecutionEventListener} instances for a set of source locations specified by a
* {@link SourceSectionFilter}. The result of an attachment is a {@link EventBinding binding}.
*
* @see #attachFactory(SourceSectionFilter, ExecutionEventNodeFactory)
* @see #attachListener(SourceSectionFilter, ExecutionEventListener)
* @since 0.12
*/
public abstract class Instrumenter {
Instrumenter() {
}
/**
* Starts event notification for a given {@link ExecutionEventNodeFactory factory} and returns a
* {@link EventBinding binding} which represents a handle to dispose the notification.
*
* @since 0.12
*/
public abstract EventBinding attachFactory(SourceSectionFilter filter, T factory);
/**
* Starts event notification for a given {@link ExecutionEventListener listener} and returns a
* {@link EventBinding binding} which represents a handle to dispose the notification.
*
* @since 0.12
*/
public abstract EventBinding attachListener(SourceSectionFilter filter, T listener);
/**
* Starts notifications for each newly loaded {@link Source} and returns a
* {@linkplain EventBinding binding} that can be used to terminate notifications. Only
* subsequent loads will be notified unless {@code includeExistingSources} is true, in which
* case a notification for each previous load will be delivered before this method returns.
*
* Note: the provided {@link SourceSectionFilter} must only contain filters on
* {@link SourceSectionFilter.Builder#sourceIs(Source...) sources} or
* {@link SourceSectionFilter.Builder#mimeTypeIs(String...) mime types}.
*
* @param filter a filter on which sources trigger events. Only filters are allowed.
* @param listener a listener that gets notified if a source was loaded
* @param includeExistingSources whether or not this listener should be notified for sources
* which were already loaded at the time when this listener was attached.
* @return a handle for stopping the notification stream
*
* @see LoadSourceListener#onLoad(LoadSourceEvent)
*
* @since 0.15
*/
public abstract EventBinding attachLoadSourceListener(SourceSectionFilter filter, T listener, boolean includeExistingSources);
/**
* Starts notifications for each {@link SourceSection} in every newly loaded {@link Source} and
* returns a {@linkplain EventBinding binding} that can be used to terminate notifications. Only
* subsequent loads will be notified unless {@code includeExistingSourceSections} is true, in
* which case a notification for each previous load will be delivered before this method
* returns.
*
* @param filter a filter on which sources sections trigger events
* @param listener a listener that gets notified if a source section was loaded
* @param includeExistingSourceSections whether or not this listener should be notified for
* sources which were already loaded at the time when this listener was attached.
* @return a handle for stopping the notification stream
*
* @see LoadSourceSectionListener#onLoad(LoadSourceSectionEvent)
*
* @since 0.15
*/
public abstract EventBinding attachLoadSourceSectionListener(SourceSectionFilter filter, T listener, boolean includeExistingSourceSections);
/**
* Attach an output stream as a consumer of the {@link TruffleInstrument.Env#out() standard
* output}. The consumer output stream receives all output that goes to
* {@link TruffleInstrument.Env#out()} since this call, including output emitted by the
* {@link com.oracle.truffle.api.vm.PolyglotEngine} this instrumenter is being executed in,
* output from instruments (including this one), etc. Be sure to {@link EventBinding#dispose()
* dispose} the binding when it's not used any more.
*
* @since 0.25
*/
public abstract EventBinding attachOutConsumer(T stream);
/**
* Attach an output stream as a consumer of the {@link TruffleInstrument.Env#err() error output}
* . The consumer output stream receives all error output that goes to
* {@link TruffleInstrument.Env#err()} since this call, including error output emitted by the
* {@link com.oracle.truffle.api.vm.PolyglotEngine} this instrumenter is being executed in,
* error output from instruments (including this one), etc. Be sure to
* {@link EventBinding#dispose() dispose} the binding when it's not used any more.
*
* @since 0.25
*/
public abstract EventBinding attachErrConsumer(T stream);
/**
* Returns a filtered list of loaded {@link SourceSection} instances.
*
* @param filter criterion for inclusion
* @return unmodifiable list of instances that pass the filter
*
* @since 0.18
*/
public final List querySourceSections(SourceSectionFilter filter) {
final List sourceSectionList = new ArrayList<>();
EventBinding binding = attachLoadSourceSectionListener(filter, new LoadSourceSectionListener() {
public void onLoad(LoadSourceSectionEvent event) {
sourceSectionList.add(event.getSourceSection());
}
}, true);
binding.dispose();
return Collections.unmodifiableList(sourceSectionList);
}
/**
* Returns an unmodifiable {@link Set} of tag classes which where associated with this node. If
* the instrumenter is used as a {@link TruffleLanguage} then only nodes can be queried for tags
* that are associated with the current language otherwise an {@link IllegalArgumentException}
* is thrown. The given node must not be null. If the given node is not
* instrumentable, the given node is not yet adopted by a {@link RootNode} or the given tag was
* not {@link ProvidedTags provided} by the language then always an empty {@link Set} is
* returned.
*
* @param node the node to query
* @return an unmodifiable {@link Set} of tag classes which where associated with this node.
* @since 0.12
*/
public abstract Set> queryTags(Node node);
}