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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/SLException.java @ 17004:158c9ba66e45

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SL: added support for guest language stack traces to SLException; added SLAssertionError.
author Christian Humer <christian.humer@gmail.com>
date Mon, 01 Sep 2014 20:08:18 +0200
parents b16ec83edc73
children
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1 /*
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2 * Copyright (c) 2014, 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;
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24
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25 import java.util.*;
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26
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27 import com.oracle.truffle.api.*;
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28 import com.oracle.truffle.api.frame.*;
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29 import com.oracle.truffle.api.nodes.*;
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30 import com.oracle.truffle.api.source.*;
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31 import com.oracle.truffle.sl.nodes.*;
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32
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33 /**
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34 * SL does not need a sophisticated error checking and reporting mechanism, so all unexpected
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35 * conditions just abort execution. This exception class is used when we abort from within the SL
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36 * implementation.
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37 */
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38 public class SLException extends RuntimeException {
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39
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40 private static final long serialVersionUID = -6799734410727348507L;
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41
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42 public SLException(String message) {
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43 super(message);
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44 initCause(new Throwable("Java stack trace"));
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45 }
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46
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47 @Override
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48 public synchronized Throwable fillInStackTrace() {
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49 return fillInSLStackTrace(this);
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50 }
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51
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52 /**
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53 * Uses the Truffle API to iterate the stack frames and to create and set Java
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54 * {@link StackTraceElement} elements based on the source sections of the call nodes on the
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55 * stack.
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56 */
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57 static Throwable fillInSLStackTrace(Throwable t) {
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58 final List<StackTraceElement> stackTrace = new ArrayList<>();
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59 Truffle.getRuntime().iterateFrames(new FrameInstanceVisitor<Void>() {
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60 public Void visitFrame(FrameInstance frame) {
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61 Node callNode = frame.getCallNode();
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62 if (callNode == null) {
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63 return null;
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64 }
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65 RootNode root = callNode.getRootNode();
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66
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67 /*
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68 * There should be no RootNodes other than SLRootNodes on the stack. Just for the
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69 * case if this would change.
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70 */
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71 String methodName = "$unknownFunction";
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72 if (root instanceof SLRootNode) {
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73 methodName = ((SLRootNode) root).getName();
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74 }
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75
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76 SourceSection sourceSection = callNode.getEncapsulatingSourceSection();
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77 Source source = sourceSection != null ? sourceSection.getSource() : null;
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78 String sourceName = source != null ? source.getName() : null;
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79 int lineNumber;
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80 try {
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81 lineNumber = sourceSection != null ? sourceSection.getLineLocation().getLineNumber() : -1;
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82 } catch (UnsupportedOperationException e) {
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83 /*
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84 * SourceSection#getLineLocation() may throw an UnsupportedOperationException.
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85 */
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86 lineNumber = -1;
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87 }
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88 stackTrace.add(new StackTraceElement("SL", methodName, sourceName, lineNumber));
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89 return null;
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90 }
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91 });
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92 t.setStackTrace(stackTrace.toArray(new StackTraceElement[stackTrace.size()]));
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93 return t;
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94 }
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95 }