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annotate truffle/com.oracle.truffle.sl/src/com/oracle/truffle/sl/SLException.java @ 22157:dc83cc1f94f2

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Using fully qualified imports
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 16 Sep 2015 11:33:22 +0200
parents 503529c65456
children
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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 * The Universal Permissive License (UPL), Version 1.0
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6 *
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7 * Subject to the condition set forth below, permission is hereby granted to any
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8 * person obtaining a copy of this software, associated documentation and/or
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9 * data (collectively the "Software"), free of charge and under any and all
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10 * copyright rights in the Software, and any and all patent rights owned or
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11 * freely licensable by each licensor hereunder covering either (i) the
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12 * unmodified Software as contributed to or provided by such licensor, or (ii)
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13 * the Larger Works (as defined below), to deal in both
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14 *
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15 * (a) the Software, and
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16 *
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17 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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18 * one is included with the Software each a "Larger Work" to which the Software
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19 * is contributed by such licensors),
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20 *
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21 * without restriction, including without limitation the rights to copy, create
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22 * derivative works of, display, perform, and distribute the Software and make,
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23 * use, sell, offer for sale, import, export, have made, and have sold the
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24 * Software and the Larger Work(s), and to sublicense the foregoing rights on
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25 * either these or other terms.
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26 *
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27 * This license is subject to the following condition:
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28 *
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29 * The above copyright notice and either this complete permission notice or at a
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30 * minimum a reference to the UPL must be included in all copies or substantial
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31 * portions of the Software.
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32 *
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33 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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34 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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35 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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36 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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37 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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38 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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39 * SOFTWARE.
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40 */
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41 package com.oracle.truffle.sl;
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42
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43 import com.oracle.truffle.api.Truffle;
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44 import com.oracle.truffle.api.frame.FrameInstance;
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45 import com.oracle.truffle.api.frame.FrameInstanceVisitor;
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46 import com.oracle.truffle.api.nodes.Node;
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47 import com.oracle.truffle.api.nodes.RootNode;
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48 import com.oracle.truffle.api.source.Source;
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49 import com.oracle.truffle.api.source.SourceSection;
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50 import com.oracle.truffle.sl.nodes.SLRootNode;
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51 import java.util.ArrayList;
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52 import java.util.List;
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53
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54 /**
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55 * SL does not need a sophisticated error checking and reporting mechanism, so all unexpected
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56 * conditions just abort execution. This exception class is used when we abort from within the SL
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57 * implementation.
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58 */
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59 public class SLException extends RuntimeException {
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60
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61 private static final long serialVersionUID = -6799734410727348507L;
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62
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63 public SLException(String message) {
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64 super(message);
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65 initCause(new Throwable("Java stack trace"));
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66 }
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67
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68 @Override
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69 public synchronized Throwable fillInStackTrace() {
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70 return fillInSLStackTrace(this);
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71 }
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72
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73 /**
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74 * Uses the Truffle API to iterate the stack frames and to create and set Java
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75 * {@link StackTraceElement} elements based on the source sections of the call nodes on the
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76 * stack.
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77 */
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78 static Throwable fillInSLStackTrace(Throwable t) {
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79 final List<StackTraceElement> stackTrace = new ArrayList<>();
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80 Truffle.getRuntime().iterateFrames(new FrameInstanceVisitor<Void>() {
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81 public Void visitFrame(FrameInstance frame) {
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82 Node callNode = frame.getCallNode();
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83 if (callNode == null) {
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84 return null;
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85 }
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86 RootNode root = callNode.getRootNode();
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87
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88 /*
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89 * There should be no RootNodes other than SLRootNodes on the stack. Just for the
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90 * case if this would change.
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91 */
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92 String methodName = "$unknownFunction";
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93 if (root instanceof SLRootNode) {
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94 methodName = ((SLRootNode) root).getName();
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95 }
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96
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97 SourceSection sourceSection = callNode.getEncapsulatingSourceSection();
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98 Source source = sourceSection != null ? sourceSection.getSource() : null;
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99 String sourceName = source != null ? source.getName() : null;
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100 int lineNumber;
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101 try {
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102 lineNumber = sourceSection != null ? sourceSection.getLineLocation().getLineNumber() : -1;
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103 } catch (UnsupportedOperationException e) {
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104 /*
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105 * SourceSection#getLineLocation() may throw an UnsupportedOperationException.
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106 */
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107 lineNumber = -1;
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108 }
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109 stackTrace.add(new StackTraceElement("SL", methodName, sourceName, lineNumber));
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110 return null;
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111 }
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112 });
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113 t.setStackTrace(stackTrace.toArray(new StackTraceElement[stackTrace.size()]));
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114 return t;
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115 }
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116 }