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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/builtins/SLStackTraceBuiltin.java @ 15097:a1b0d7a1ef40

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SL: Make SLStackTraceBuilting comfortable with non-graal runtimes.
author Christian Humer <christian.humer@gmail.com>
date Mon, 14 Apr 2014 22:36:42 +0200
parents d3add9b82b71
children a3b0ecef8a15
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1 /*
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2 * Copyright (c) 2012, 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.builtins;
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24
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25 import com.oracle.truffle.api.*;
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26 import com.oracle.truffle.api.CompilerDirectives.SlowPath;
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27 import com.oracle.truffle.api.dsl.*;
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28 import com.oracle.truffle.api.frame.*;
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29 import com.oracle.truffle.api.frame.FrameInstance.FrameAccess;
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30 import com.oracle.truffle.api.nodes.*;
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31
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32 /**
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33 * Returns a string representation of the current stack. This includes the {@link CallTarget}s and
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34 * the contents of the {@link Frame}. Note that this is implemented as a slow path by passing
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35 * {@code true} to {@link FrameInstance#getFrame(FrameAccess, boolean)}.
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36 */
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37 @NodeInfo(shortName = "stacktrace")
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38 public abstract class SLStackTraceBuiltin extends SLBuiltinNode {
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39
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40 @Specialization
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41 public String trace() {
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42 return createStackTrace();
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43 }
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44
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45 @SlowPath
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46 private static String createStackTrace() {
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47 StringBuilder str = new StringBuilder();
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48 Iterable<FrameInstance> frames = Truffle.getRuntime().getStackTrace();
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49
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50 if (frames != null) {
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51 for (FrameInstance frame : frames) {
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52 dumpFrame(str, frame.getCallTarget(), frame.getFrame(FrameAccess.READ_ONLY, true), frame.isVirtualFrame());
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53 }
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54 }
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55 return str.toString();
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56 }
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57
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58 private static void dumpFrame(StringBuilder str, CallTarget rootNode, Frame frame, boolean isVirtual) {
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59 if (str.length() > 0) {
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60 str.append("\n");
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61 }
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62 str.append("Frame: ").append(rootNode).append(isVirtual ? " (virtual)" : "");
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63 FrameDescriptor frameDescriptor = frame.getFrameDescriptor();
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64 for (FrameSlot s : frameDescriptor.getSlots()) {
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65 str.append(", ").append(s.getIdentifier()).append("=").append(frame.getValue(s));
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66 }
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67 }
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68 }