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Truffle is a multi-language framework for executing dynamic languages
that achieves high performance when combined with Graal.
/*
* Copyright (c) 2017, 2018, 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
* freely licensable by each licensor hereunder covering either (i) the
* 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),
*
* without restriction, including without limitation the rights to copy, create
* derivative works of, display, perform, and distribute the Software and make,
* use, sell, offer for sale, import, export, have made, and have sold the
* 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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package com.oracle.truffle.api.debug;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.Function;
import com.oracle.truffle.api.TruffleContext;
import com.oracle.truffle.api.instrumentation.ContextsListener;
import com.oracle.truffle.api.instrumentation.EventBinding;
import com.oracle.truffle.api.instrumentation.Instrumenter;
import com.oracle.truffle.api.instrumentation.ThreadsListener;
import com.oracle.truffle.api.nodes.LanguageInfo;
final class DebuggerExecutionLifecycle implements ContextsListener, ThreadsListener {
private final DebuggerSession session;
private final Instrumenter lifecycleInstrumenter;
private EventBinding contextsBinding;
private volatile DebugContextsListener contextsListener;
private EventBinding threadsBinding;
private volatile DebugThreadsListener threadsListener;
private final Map contextMap = new ConcurrentHashMap<>();
DebuggerExecutionLifecycle(DebuggerSession session) {
this.session = session;
this.lifecycleInstrumenter = session.getDebugger().getEnv().getInstrumenter();
}
synchronized void setContextsListener(DebugContextsListener listener, boolean includeExistingContexts) {
if (contextsBinding != null) {
contextsBinding.dispose();
}
contextsListener = listener;
if (listener != null) {
contextsBinding = lifecycleInstrumenter.attachContextsListener(this, includeExistingContexts);
} else {
contextsBinding = null;
if (threadsBinding == null) {
contextMap.clear();
}
}
}
synchronized void setThreadsListener(DebugThreadsListener listener, boolean includeExistingThreads) {
if (threadsBinding != null) {
threadsBinding.dispose();
}
this.threadsListener = listener;
if (listener != null) {
threadsBinding = lifecycleInstrumenter.attachThreadsListener(this, includeExistingThreads);
} else {
threadsBinding = null;
if (contextsBinding == null) {
contextMap.clear();
}
}
}
DebugContext getCachedDebugContext(TruffleContext context) {
return contextMap.computeIfAbsent(context, new Function() {
@Override
public DebugContext apply(TruffleContext c) {
return new DebugContext(DebuggerExecutionLifecycle.this, c);
}
});
}
Debugger getDebugger() {
return session.getDebugger();
}
DebuggerSession getSession() {
return session;
}
@Override
public void onContextCreated(TruffleContext context) {
DebugContextsListener l = contextsListener;
if (l != null) {
DebugContext dc = getCachedDebugContext(context);
l.contextCreated(dc);
}
}
@Override
public void onLanguageContextCreated(TruffleContext context, LanguageInfo language) {
DebugContextsListener l = contextsListener;
if (l != null) {
DebugContext dc = getCachedDebugContext(context);
l.languageContextCreated(dc, language);
}
}
@Override
public void onLanguageContextInitialized(TruffleContext context, LanguageInfo language) {
DebugContextsListener l = contextsListener;
if (l != null) {
DebugContext dc = getCachedDebugContext(context);
l.languageContextInitialized(dc, language);
}
}
@Override
public void onLanguageContextFinalized(TruffleContext context, LanguageInfo language) {
DebugContextsListener l = contextsListener;
if (l != null) {
DebugContext dc = getCachedDebugContext(context);
l.languageContextFinalized(dc, language);
}
}
@Override
public void onLanguageContextDisposed(TruffleContext context, LanguageInfo language) {
DebugContextsListener l = contextsListener;
if (l != null) {
DebugContext dc = getCachedDebugContext(context);
l.languageContextDisposed(dc, language);
}
}
@Override
public void onContextClosed(TruffleContext context) {
DebugContextsListener l = contextsListener;
if (l != null) {
DebugContext dc = getCachedDebugContext(context);
l.contextClosed(dc);
}
}
@Override
public void onThreadInitialized(TruffleContext context, Thread thread) {
DebugThreadsListener l = threadsListener;
if (l != null) {
DebugContext dc = getCachedDebugContext(context);
l.threadInitialized(dc, thread);
}
}
@Override
public void onThreadDisposed(TruffleContext context, Thread thread) {
DebugThreadsListener l = threadsListener;
if (l != null) {
DebugContext dc = getCachedDebugContext(context);
l.threadDisposed(dc, thread);
}
}
}