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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/stubs/NewArrayStub.java @ 9872:4391fd907278

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use StubForeignCallNode within stubs, instead of ForeignCallNode
author Lukas Stadler <lukas.stadler@jku.at>
date Wed, 05 Jun 2013 11:34:55 +0200
parents b4f12c603be5
children 03c781923573
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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.HotSpotGraalRuntime.*;
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26 import static com.oracle.graal.hotspot.replacements.HotSpotReplacementsUtil.*;
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27 import static com.oracle.graal.hotspot.replacements.NewObjectSnippets.*;
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28 import static com.oracle.graal.hotspot.stubs.NewInstanceStub.*;
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29 import static com.oracle.graal.hotspot.stubs.StubUtil.*;
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30
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31 import com.oracle.graal.api.code.*;
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32 import com.oracle.graal.api.meta.*;
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33 import com.oracle.graal.graph.Node.ConstantNodeParameter;
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34 import com.oracle.graal.graph.Node.NodeIntrinsic;
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35 import com.oracle.graal.hotspot.*;
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36 import com.oracle.graal.hotspot.meta.*;
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37 import com.oracle.graal.hotspot.nodes.*;
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38 import com.oracle.graal.hotspot.replacements.*;
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39 import com.oracle.graal.nodes.spi.*;
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40 import com.oracle.graal.replacements.*;
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41 import com.oracle.graal.replacements.Snippet.ConstantParameter;
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42 import com.oracle.graal.replacements.Snippet.Fold;
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43 import com.oracle.graal.replacements.SnippetTemplate.Arguments;
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44 import com.oracle.graal.replacements.SnippetTemplate.SnippetInfo;
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45 import com.oracle.graal.word.*;
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46
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47 /**
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48 * Stub implementing the fast path for TLAB refill during instance class allocation. This stub is
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49 * called via {@link NewArrayStubCall} from the {@linkplain NewObjectSnippets inline} allocation
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50 * code when TLAB allocation fails. If this stub fails to refill the TLAB or allocate the object, it
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51 * calls out to the HotSpot C++ runtime to complete the allocation.
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52 */
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53 public class NewArrayStub extends SnippetStub {
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54
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55 public NewArrayStub(final HotSpotRuntime runtime, Replacements replacements, TargetDescription target, HotSpotForeignCallLinkage linkage) {
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56 super(runtime, replacements, target, linkage);
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57 }
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58
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59 @Override
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60 protected Arguments makeArguments(SnippetInfo stub) {
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61 HotSpotResolvedObjectType intArrayType = (HotSpotResolvedObjectType) runtime.lookupJavaType(int[].class);
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62
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63 // RuntimeStub cannot (currently) support oops or metadata embedded in the code so we
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64 // convert the hub (i.e., Klass*) for int[] to be a naked word. This should be safe since
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65 // the int[] class will never be unloaded.
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66 Constant intArrayHub = intArrayType.klass();
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67 intArrayHub = Constant.forIntegerKind(graalRuntime().getTarget().wordKind, intArrayHub.asLong(), null);
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68
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69 Arguments args = new Arguments(stub);
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70 args.add("hub", null);
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71 args.add("length", null);
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72 args.addConst("intArrayHub", intArrayHub);
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73 return args;
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74 }
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75
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76 @Fold
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77 private static boolean logging() {
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78 return Boolean.getBoolean("graal.logNewArrayStub");
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79 }
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80
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81 /**
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82 * Re-attempts allocation after an initial TLAB allocation failed or was skipped (e.g., due to
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83 * -XX:-UseTLAB).
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84 *
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85 * @param hub the hub of the object to be allocated
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86 * @param length the length of the array
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87 * @param intArrayHub the hub for {@code int[].class}
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88 */
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89 @Snippet
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90 private static Object newArray(Word hub, int length, @ConstantParameter Word intArrayHub) {
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91 int layoutHelper = hub.readInt(layoutHelperOffset(), LocationIdentity.FINAL_LOCATION);
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92 int log2ElementSize = (layoutHelper >> layoutHelperLog2ElementSizeShift()) & layoutHelperLog2ElementSizeMask();
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93 int headerSize = (layoutHelper >> layoutHelperHeaderSizeShift()) & layoutHelperHeaderSizeMask();
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94 int elementKind = (layoutHelper >> layoutHelperElementTypeShift()) & layoutHelperElementTypeMask();
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95 int sizeInBytes = computeArrayAllocationSize(length, wordSize(), headerSize, log2ElementSize);
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96 if (logging()) {
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97 printf("newArray: element kind %d\n", elementKind);
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98 printf("newArray: array length %d\n", length);
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99 printf("newArray: array size %d\n", sizeInBytes);
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100 printf("newArray: hub=%p\n", hub.rawValue());
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101 }
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102
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103 // check that array length is small enough for fast path.
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104 if (length <= MAX_ARRAY_FAST_PATH_ALLOCATION_LENGTH) {
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105 Word memory = refillAllocate(intArrayHub, sizeInBytes, logging());
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106 if (memory.notEqual(0)) {
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107 if (logging()) {
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108 printf("newArray: allocated new array at %p\n", memory.rawValue());
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109 }
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110 return verifyObject(formatArray(hub, sizeInBytes, length, headerSize, memory, Word.unsigned(arrayPrototypeMarkWord()), true));
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111 }
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112 }
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113 if (logging()) {
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114 printf("newArray: calling new_array_c\n");
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115 }
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116
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117 newArrayC(NEW_ARRAY_C, thread(), hub, length);
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118 handlePendingException(true);
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119 return verifyObject(getAndClearObjectResult(thread()));
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120 }
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121
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122 public static final ForeignCallDescriptor NEW_ARRAY_C = descriptorFor(NewArrayStub.class, "newArrayC");
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123
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4391fd907278 use StubForeignCallNode within stubs, instead of ForeignCallNode
Lukas Stadler <lukas.stadler@jku.at>
parents: 9793
diff changeset
124 @NodeIntrinsic(StubForeignCallNode.class)
9735
2e4f035186cf rename: Descriptor -> ForeignCallDescriptor
Doug Simon <doug.simon@oracle.com>
parents: 9688
diff changeset
125 public static native void newArrayC(@ConstantNodeParameter ForeignCallDescriptor newArrayC, Word thread, Word hub, int length);
7147
88d626e2c2a8 added TLAB fast refill stub for array allocation
Doug Simon <doug.simon@oracle.com>
parents:
diff changeset
126 }