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annotate graal/com.oracle.truffle.sl.test/src/com/oracle/truffle/sl/test/instrument/SLCheckVariableEqualityInstrument.java @ 16702:2a5ec181dad4

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SL: Added instrumentation testing
author David Piorkowski <david.piorkowski@oracle.com>
date Tue, 05 Aug 2014 16:34:08 -0700
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children a24beb9c9993
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1 /*
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2 * Copyright (c) 2012, 2013, 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.controlflow.*;
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31 import com.oracle.truffle.sl.runtime.*;
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32
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33 /**
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34 * This sample instrument provides an example of a naive way to check if two numbers in SL are
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35 * equivalent using their variable names. This instrument is designed to be attached to an
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36 * {@link SLReturnNode}, but provides no guards against this.
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37 */
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38 public class SLCheckVariableEqualityInstrument extends Instrument {
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39
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40 private final String varName1;
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41 private final String varName2;
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42 private final PrintStream output;
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43
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44 /**
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45 * Constructor
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46 *
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47 * @param varName1 The name of the first variable to compare
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48 * @param varName2 The name of the second variable to compare
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49 * @param output The {@link PrintStream} from the context used to print results. See
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50 * {@link SLContext#getOutput()} for more info.
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51 */
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52 public SLCheckVariableEqualityInstrument(String varName1, String varName2, PrintStream output) {
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53 this.varName1 = varName1;
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54 this.varName2 = varName2;
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55 this.output = output;
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56 }
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57
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58 /**
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59 * In the instrumentation test, this instrument is attached to a return statement. Since returns
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60 * are handled via exceptions in Simple, we need to override the leaveExceptional method. This
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61 * method does very limited error checking and simply prints "true" if the passed-in variables
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62 * match or "false" if they do not.
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63 */
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64 @Override
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65 public void leaveExceptional(Node astNode, VirtualFrame frame, Exception e) {
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66 FrameSlot f1 = frame.getFrameDescriptor().findFrameSlot(varName1);
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67 FrameSlot f2 = frame.getFrameDescriptor().findFrameSlot(varName2);
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68
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69 if (f1 == null || f2 == null)
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70 output.println("false");
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71 else {
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72 try {
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73 output.println(frame.getLong(f1) == frame.getLong(f2));
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74 } catch (FrameSlotTypeException e1) {
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75 e1.printStackTrace();
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76 }
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77 }
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78
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79 }
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80 }