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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/stubs/NewArrayStub.java @ 7530:5e3d1a68664e

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applied mx eclipseformat to all Java files
author Doug Simon <doug.simon@oracle.com>
date Wed, 23 Jan 2013 16:34:57 +0100
parents fe9f252f0d05
children 630ea5001e33
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1 /*
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2 * Copyright (c) 2012, 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.graal.hotspot.stubs;
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24
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25 import static com.oracle.graal.hotspot.snippets.HotSpotSnippetUtils.*;
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26 import static com.oracle.graal.hotspot.snippets.NewObjectSnippets.*;
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27 import static com.oracle.graal.hotspot.stubs.NewInstanceStub.*;
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28
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29 import com.oracle.graal.api.code.*;
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30 import com.oracle.graal.api.meta.*;
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31 import com.oracle.graal.hotspot.meta.*;
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32 import com.oracle.graal.hotspot.nodes.*;
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33 import com.oracle.graal.hotspot.snippets.*;
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34 import com.oracle.graal.snippets.*;
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35 import com.oracle.graal.snippets.Snippet.ConstantParameter;
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36 import com.oracle.graal.snippets.Snippet.Parameter;
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37 import com.oracle.graal.snippets.SnippetTemplate.Key;
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38 import com.oracle.graal.word.*;
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39
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40 /**
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41 * Stub implementing the fast path for TLAB refill during instance class allocation. This stub is
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42 * called from the {@linkplain NewObjectSnippets inline} allocation code when TLAB allocation fails.
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43 * If this stub fails to refill the TLAB or allocate the object, it calls out to the HotSpot C++
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44 * runtime for to complete the allocation.
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45 */
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46 public class NewArrayStub extends Stub {
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47
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48 public NewArrayStub(final HotSpotRuntime runtime, Assumptions assumptions, TargetDescription target) {
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49 super(runtime, assumptions, target, NewArrayStubCall.NEW_ARRAY);
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50 }
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51
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52 @Override
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53 protected void populateKey(Key key) {
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54 HotSpotResolvedObjectType intArrayType = (HotSpotResolvedObjectType) runtime.lookupJavaType(int[].class);
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55 Constant intArrayHub = intArrayType.klass();
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56 key.add("intArrayHub", intArrayHub).add("log", Boolean.getBoolean("graal.logNewArrayStub"));
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57 }
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58
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59 /**
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60 * Re-attempts allocation after an initial TLAB allocation failed or was skipped (e.g., due to
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61 * -XX:-UseTLAB).
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62 *
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63 * @param hub the hub of the object to be allocated
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64 * @param length the length of the array
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65 * @param intArrayHub the hub for {@code int[].class}
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66 * @param log specifies if logging is enabled
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67 */
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68 @Snippet
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69 private static Object newArray(@Parameter("hub")
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70 Word hub, @Parameter("length")
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71 int length, @ConstantParameter("intArrayHub")
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72 Word intArrayHub, @ConstantParameter("log")
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73 boolean log) {
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74 int layoutHelper = hub.readInt(layoutHelperOffset());
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75 int log2ElementSize = (layoutHelper >> layoutHelperLog2ElementSizeShift()) & layoutHelperLog2ElementSizeMask();
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76 int headerSize = (layoutHelper >> layoutHelperHeaderSizeShift()) & layoutHelperHeaderSizeMask();
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77 int elementKind = (layoutHelper >> layoutHelperElementTypeShift()) & layoutHelperElementTypeMask();
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78 int sizeInBytes = computeArrayAllocationSize(length, wordSize(), headerSize, log2ElementSize);
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79 log(log, "newArray: element kind %d\n", elementKind);
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80 log(log, "newArray: array length %d\n", length);
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81 log(log, "newArray: array size %d\n", sizeInBytes);
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82 log(log, "newArray: hub=%p\n", hub);
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83
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84 // check that array length is small enough for fast path.
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85 if (length <= MAX_ARRAY_FAST_PATH_ALLOCATION_LENGTH) {
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86 Word memory = refillAllocate(intArrayHub, sizeInBytes, log);
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87 if (memory != Word.zero()) {
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88 log(log, "newArray: allocated new array at %p\n", memory);
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89 formatArray(hub, sizeInBytes, length, headerSize, memory, Word.unsigned(arrayPrototypeMarkWord()), true);
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90 return verifyOop(memory.toObject());
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91 }
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92 }
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93 log(log, "newArray: calling new_array_slow", 0L);
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94 return verifyOop(NewArraySlowStubCall.call(hub, length));
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95 }
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96 }