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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotNmethod.java @ 10886:1b800f44ac0c

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Make HotSpotNmethod class final and set it as declared type of OptimizedCallTarget.compiledMethod.
author Andreas Woess <andreas.woess@jku.at>
date Fri, 26 Jul 2013 16:53:34 +0200
parents 63083745d390
children 001c41b01d13
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1 /*
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2 * Copyright (c) 2011, 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.meta;
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24
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25 import static com.oracle.graal.hotspot.HotSpotGraalRuntime.*;
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26
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27 import java.lang.reflect.*;
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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.graph.*;
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32 import com.oracle.graal.hotspot.bridge.*;
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33
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34 /**
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35 * Implementation of {@link InstalledCode} for code installed as an nmethod. The nmethod stores a
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36 * weak reference to an instance of this class. This is necessary to keep the nmethod from being
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37 * unloaded while the associated {@link HotSpotNmethod} instance is alive.
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38 * <p>
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39 * Note that there is no (current) way for the reference from an nmethod to a {@link HotSpotNmethod}
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40 * instance to be anything but weak. This is due to the fact that HotSpot does not treat nmethods as
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41 * strong GC roots.
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42 */
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1b800f44ac0c Make HotSpotNmethod class final and set it as declared type of OptimizedCallTarget.compiledMethod.
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43 public final class HotSpotNmethod extends HotSpotInstalledCode {
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44
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45 private static final long serialVersionUID = -1784683588947054103L;
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46
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47 private final HotSpotResolvedJavaMethod method;
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48 private final boolean isDefault;
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49 private final boolean isExternal;
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50 private final Graph graph;
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51
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52 public HotSpotNmethod(HotSpotResolvedJavaMethod method, boolean isDefault, Graph graph) {
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53 this.method = method;
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54 this.isDefault = isDefault;
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55 this.isExternal = false;
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56 this.graph = graph;
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57 }
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58
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59 public HotSpotNmethod(HotSpotResolvedJavaMethod method, boolean isDefault, boolean isExternal, Graph graph) {
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60 this.method = method;
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61 this.isDefault = isDefault;
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62 this.isExternal = isExternal;
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63 this.graph = graph;
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64 }
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65
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66 public boolean isDefault() {
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67 return isDefault;
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68 }
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69
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70 public boolean isExternal() {
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71 return isExternal;
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72 }
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73
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74 public Graph getGraph() {
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75 return graph;
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76 }
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77
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78 @Override
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79 public ResolvedJavaMethod getMethod() {
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80 return method;
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81 }
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82
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83 @Override
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84 public boolean isValid() {
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85 return codeBlob != 0;
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86 }
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87
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88 @Override
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89 public void invalidate() {
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90 graalRuntime().getCompilerToVM().invalidateInstalledCode(this);
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91 }
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92
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93 @Override
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94 public String toString() {
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95 return String.format("InstalledNmethod[method=%s, codeBlob=0x%x, isDefault=%b]", method, codeBlob, isDefault);
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96 }
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97
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98 @Override
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99 public Object execute(Object arg1, Object arg2, Object arg3) throws InvalidInstalledCodeException {
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100 assert checkThreeObjectArgs();
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101 return CompilerToVMImpl.executeCompiledMethodIntrinsic(arg1, arg2, arg3, this);
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102 }
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103
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104 protected boolean checkThreeObjectArgs() {
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105 assert method.getSignature().getParameterCount(!Modifier.isStatic(method.getModifiers())) == 3;
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106 assert method.getSignature().getParameterKind(0) == Kind.Object;
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107 assert method.getSignature().getParameterKind(1) == Kind.Object;
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108 assert !Modifier.isStatic(method.getModifiers()) || method.getSignature().getParameterKind(2) == Kind.Object;
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109 return true;
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110 }
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111
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112 private boolean checkArgs(Object... args) {
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113 JavaType[] sig = MetaUtil.signatureToTypes(method);
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114 assert args.length == sig.length : MetaUtil.format("%H.%n(%p): expected ", method) + sig.length + " args, got " + args.length;
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115 for (int i = 0; i < sig.length; i++) {
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116 Object arg = args[i];
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117 if (arg == null) {
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118 assert sig[i].getKind() == Kind.Object : MetaUtil.format("%H.%n(%p): expected arg ", method) + i + " to be Object, not " + sig[i];
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119 } else if (sig[i].getKind() != Kind.Object) {
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120 assert sig[i].getKind().toBoxedJavaClass() == arg.getClass() : MetaUtil.format("%H.%n(%p): expected arg ", method) + i + " to be " + sig[i] + ", not " + arg.getClass();
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121 }
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122 }
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123 return true;
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124 }
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125
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126 @Override
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127 public Object executeVarargs(Object... args) throws InvalidInstalledCodeException {
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128 assert checkArgs(args);
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129 if (isExternal()) {
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130 return graalRuntime().getCompilerToGPU().executeExternalMethodVarargs(args, this);
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131 } else {
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132 return graalRuntime().getCompilerToVM().executeCompiledMethodVarargs(args, this);
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133 }
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134 }
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135
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136 @Override
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137 public long getStart() {
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138 return isValid() ? start : 0;
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139 }
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140 }