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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/stubs/NewArrayStub.java @ 21556:48c1ebd24120

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renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Wed, 27 May 2015 00:36:16 +0200
parents 5324104ac4f3
children 0e095e2c24e2
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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.graal.hotspot.stubs;
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24
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25 import com.oracle.jvmci.code.Register;
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26 import com.oracle.jvmci.meta.ForeignCallDescriptor;
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27 import static com.oracle.graal.hotspot.replacements.HotSpotReplacementsUtil.*;
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28 import static com.oracle.graal.hotspot.replacements.NewObjectSnippets.*;
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29 import static com.oracle.graal.hotspot.stubs.NewInstanceStub.*;
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30 import static com.oracle.graal.hotspot.stubs.StubUtil.*;
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31 import static com.oracle.jvmci.hotspot.HotSpotMetaAccessProvider.*;
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32
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33 import com.oracle.graal.api.replacements.*;
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34 import com.oracle.graal.graph.Node.ConstantNodeParameter;
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35 import com.oracle.graal.graph.Node.NodeIntrinsic;
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36 import com.oracle.graal.hotspot.*;
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37 import com.oracle.graal.hotspot.meta.*;
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38 import com.oracle.graal.hotspot.nodes.*;
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39 import com.oracle.graal.hotspot.nodes.type.*;
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40 import com.oracle.graal.hotspot.replacements.*;
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41 import com.oracle.graal.hotspot.word.*;
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42 import com.oracle.graal.nodes.*;
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43 import com.oracle.graal.replacements.*;
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44 import com.oracle.graal.replacements.Snippet.ConstantParameter;
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45 import com.oracle.graal.word.*;
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46 import com.oracle.jvmci.hotspot.*;
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47
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48 /**
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49 * Stub implementing the fast path for TLAB refill during instance class allocation. This stub is
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50 * called from the {@linkplain NewObjectSnippets inline} allocation code when TLAB allocation fails.
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51 * If this stub fails to refill the TLAB or allocate the object, it calls out to the HotSpot C++
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52 * runtime to complete the allocation.
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53 */
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54 public class NewArrayStub extends SnippetStub {
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55
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56 public NewArrayStub(HotSpotProviders providers, HotSpotForeignCallLinkage linkage) {
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57 super("newArray", providers, linkage);
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58 }
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59
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60 @Override
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61 protected Object[] makeConstArgs() {
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62 HotSpotResolvedObjectType intArrayType = (HotSpotResolvedObjectType) providers.getMetaAccess().lookupJavaType(int[].class);
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63 int count = method.getSignature().getParameterCount(false);
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64 Object[] args = new Object[count];
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65 assert checkConstArg(2, "intArrayHub");
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66 assert checkConstArg(3, "threadRegister");
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67 args[2] = ConstantNode.forConstant(KlassPointerStamp.klassNonNull(), intArrayType.klass(), null);
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68 args[3] = providers.getRegisters().getThreadRegister();
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69 return args;
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70 }
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71
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72 @Fold
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73 private static boolean logging() {
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74 return Boolean.getBoolean("graal.logNewArrayStub");
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75 }
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76
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77 /**
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78 * Re-attempts allocation after an initial TLAB allocation failed or was skipped (e.g., due to
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79 * -XX:-UseTLAB).
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80 *
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81 * @param hub the hub of the object to be allocated
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82 * @param length the length of the array
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83 * @param intArrayHub the hub for {@code int[].class}
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84 */
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85 @Snippet
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86 private static Object newArray(KlassPointer hub, int length, @ConstantParameter KlassPointer intArrayHub, @ConstantParameter Register threadRegister) {
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87 int layoutHelper = loadKlassLayoutHelperIntrinsic(hub);
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88 int log2ElementSize = (layoutHelper >> layoutHelperLog2ElementSizeShift()) & layoutHelperLog2ElementSizeMask();
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89 int headerSize = (layoutHelper >> layoutHelperHeaderSizeShift()) & layoutHelperHeaderSizeMask();
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90 int elementKind = (layoutHelper >> layoutHelperElementTypeShift()) & layoutHelperElementTypeMask();
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91 int sizeInBytes = computeArrayAllocationSize(length, wordSize(), headerSize, log2ElementSize);
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92 if (logging()) {
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93 printf("newArray: element kind %d\n", elementKind);
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94 printf("newArray: array length %d\n", length);
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95 printf("newArray: array size %d\n", sizeInBytes);
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96 printf("newArray: hub=%p\n", hub.asWord().rawValue());
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97 }
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98
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99 // check that array length is small enough for fast path.
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100 Word thread = registerAsWord(threadRegister);
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101 if (length >= 0 && length <= MAX_ARRAY_FAST_PATH_ALLOCATION_LENGTH) {
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102 Word memory = refillAllocate(thread, intArrayHub, sizeInBytes, logging());
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103 if (memory.notEqual(0)) {
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104 if (logging()) {
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105 printf("newArray: allocated new array at %p\n", memory.rawValue());
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106 }
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107 return verifyObject(formatArray(hub, sizeInBytes, length, headerSize, memory, Word.unsigned(arrayPrototypeMarkWord()), true, false, false));
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108 }
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109 }
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110 if (logging()) {
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111 printf("newArray: calling new_array_c\n");
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112 }
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113
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114 newArrayC(NEW_ARRAY_C, thread, hub, length);
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115 handlePendingException(thread, true);
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116 return verifyObject(getAndClearObjectResult(thread));
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117 }
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118
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119 public static final ForeignCallDescriptor NEW_ARRAY_C = newDescriptor(NewArrayStub.class, "newArrayC", void.class, Word.class, KlassPointer.class, int.class);
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120
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121 @NodeIntrinsic(StubForeignCallNode.class)
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122 public static native void newArrayC(@ConstantNodeParameter ForeignCallDescriptor newArrayC, Word thread, KlassPointer hub, int length);
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88d626e2c2a8 added TLAB fast refill stub for array allocation
Doug Simon <doug.simon@oracle.com>
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123 }