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annotate graal/com.oracle.truffle.sl.test/src/com/oracle/truffle/sl/test/instrument/SLPrintAssigmentValueInstrument.java @ 16776:a24beb9c9993

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SL/instrumentation: minor cleanups in sl.test.instrument
author Michael Van De Vanter <michael.van.de.vanter@oracle.com>
date Mon, 11 Aug 2014 13:51:26 -0700
parents 2a5ec181dad4
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1 /*
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.truffle.sl.test.instrument;
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24
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25 import java.io.*;
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26
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27 import com.oracle.truffle.api.frame.*;
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28 import com.oracle.truffle.api.instrument.*;
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29 import com.oracle.truffle.api.nodes.*;
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30 import com.oracle.truffle.sl.nodes.local.*;
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31
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32 /**
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33 * This sample instrument provides prints the value of an assignment (after the assignment is
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34 * complete) to the {@link PrintStream} specified in the constructor. This instrument can only be
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35 * attached to a wrapped {@link SLWriteLocalVariableNode}, but provides no guards to protect it from
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36 * being attached elsewhere.
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37 */
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38 public final class SLPrintAssigmentValueInstrument extends Instrument {
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39
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40 private PrintStream output;
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41
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42 public SLPrintAssigmentValueInstrument(PrintStream output) {
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43 this.output = output;
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44 }
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45
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46 @Override
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47 public void leave(Node astNode, VirtualFrame frame, Object result) {
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48 output.println(result);
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49 }
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50 }