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view graal/com.oracle.truffle.api/src/com/oracle/truffle/api/tools/LineToProbesMap.java @ 19703:27fe86a6fb49
Truffle/Instrumentation: Javadoc
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Wed, 04 Mar 2015 16:28:05 -0800 |
parents | ac35617db239 |
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/* * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * 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 * by Oracle in the LICENSE file that accompanied this code. * * 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). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.truffle.api.tools; import java.io.*; import java.util.*; import com.oracle.truffle.api.instrument.*; import com.oracle.truffle.api.instrument.impl.*; import com.oracle.truffle.api.source.*; /** * An {@link InstrumentationTool} that builds a map of every {@link Probe} attached to some AST, * indexed by {@link Source} and line number. */ public final class LineToProbesMap extends InstrumentationTool { private static final boolean TRACE = false; private static final PrintStream OUT = System.out; private static void trace(String msg) { OUT.println("LineToProbesMap: " + msg); } /** * Map: Source line ==> probes associated with source sections starting on the line. */ private final Map<LineLocation, Collection<Probe>> lineToProbesMap = new HashMap<>(); private final ProbeListener probeListener; /** * Create a map of {@link Probe}s that collects information on all probes added to subsequently * created ASTs (once installed). */ public LineToProbesMap() { this.probeListener = new LineToProbesListener(); } @Override protected boolean internalInstall() { Probe.addProbeListener(probeListener); return true; } @Override protected void internalReset() { lineToProbesMap.clear(); } @Override protected void internalDispose() { Probe.removeProbeListener(probeListener); } /** * Returns the {@link Probe}, if any, associated with a specific line of guest language code; if * more than one, return the one with the first starting character location. */ public Probe findFirstProbe(LineLocation lineLocation) { Probe probe = null; final Collection<Probe> probes = findProbes(lineLocation); for (Probe probesOnLine : probes) { if (probe == null) { probe = probesOnLine; } else if (probesOnLine.getProbedSourceSection().getCharIndex() < probe.getProbedSourceSection().getCharIndex()) { probe = probesOnLine; } } return probe; } /** * Returns all {@link Probe}s whose associated source begins at the given {@link LineLocation}, * an empty list if none. */ public Collection<Probe> findProbes(LineLocation line) { final Collection<Probe> probes = lineToProbesMap.get(line); if (probes == null) { return Collections.emptyList(); } return Collections.unmodifiableCollection(probes); } private class LineToProbesListener extends DefaultProbeListener { @Override public void newProbeInserted(Probe probe) { final SourceSection sourceSection = probe.getProbedSourceSection(); if (sourceSection != null && !(sourceSection instanceof NullSourceSection)) { final LineLocation lineLocation = sourceSection.getLineLocation(); if (TRACE) { trace("ADD " + lineLocation.getShortDescription() + " ==> " + probe.getShortDescription()); } Collection<Probe> probes = lineToProbesMap.get(lineLocation); if (probes == null) { probes = new ArrayList<>(2); lineToProbesMap.put(lineLocation, probes); } else { assert !probes.contains(probe); } probes.add(probe); } } } }