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annotate graal/com.oracle.jvmci.hotspot/src/com/oracle/jvmci/hotspot/HotSpotNmethod.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 9579a3c62a9e
children f5b549811bac
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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.jvmci.hotspot;
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24
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25 import static com.oracle.jvmci.hotspot.HotSpotJVMCIRuntime.*;
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27 import com.oracle.jvmci.code.*;
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28 import com.oracle.jvmci.meta.*;
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29
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30
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31 /**
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32 * Implementation of {@link InstalledCode} for code installed as an nmethod. The nmethod stores a
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33 * weak reference to an instance of this class. This is necessary to keep the nmethod from being
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34 * unloaded while the associated {@link HotSpotNmethod} instance is alive.
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35 * <p>
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36 * Note that there is no (current) way for the reference from an nmethod to a {@link HotSpotNmethod}
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37 * instance to be anything but weak. This is due to the fact that HotSpot does not treat nmethods as
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38 * strong GC roots.
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39 */
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40 public class HotSpotNmethod extends HotSpotInstalledCode {
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41
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42 /**
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43 * This (indirect) Method* reference is safe since class redefinition preserves all methods
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44 * associated with nmethods in the code cache.
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45 */
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46 private final HotSpotResolvedJavaMethod method;
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47
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48 private final boolean isDefault;
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49 private final boolean isExternal;
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50
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51 public HotSpotNmethod(HotSpotResolvedJavaMethod method, String name, boolean isDefault) {
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52 this(method, name, isDefault, false);
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53 }
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54
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55 public HotSpotNmethod(HotSpotResolvedJavaMethod method, String name, boolean isDefault, boolean isExternal) {
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56 super(name);
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57 this.method = method;
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58 this.isDefault = isDefault;
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59 this.isExternal = isExternal;
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60 }
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61
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62 public boolean isDefault() {
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63 return isDefault;
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64 }
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65
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66 public boolean isExternal() {
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67 return isExternal;
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68 }
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69
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70 public ResolvedJavaMethod getMethod() {
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71 return method;
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72 }
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73
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74 @Override
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75 public void invalidate() {
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76 runtime().getCompilerToVM().invalidateInstalledCode(this);
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77 }
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78
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79 @Override
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80 public String toString() {
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81 return String.format("InstalledNmethod[method=%s, codeBlob=0x%x, isDefault=%b, name=%s]", method, getAddress(), isDefault, name);
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82 }
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83
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84 protected boolean checkThreeObjectArgs() {
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85 assert method.getSignature().getParameterCount(!method.isStatic()) == 3;
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86 assert method.getSignature().getParameterKind(0) == Kind.Object;
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87 assert method.getSignature().getParameterKind(1) == Kind.Object;
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88 assert !method.isStatic() || method.getSignature().getParameterKind(2) == Kind.Object;
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89 return true;
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90 }
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91
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92 private boolean checkArgs(Object... args) {
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93 JavaType[] sig = method.toParameterTypes();
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94 assert args.length == sig.length : method.format("%H.%n(%p): expected ") + sig.length + " args, got " + args.length;
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95 for (int i = 0; i < sig.length; i++) {
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96 Object arg = args[i];
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97 if (arg == null) {
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98 assert sig[i].getKind() == Kind.Object : method.format("%H.%n(%p): expected arg ") + i + " to be Object, not " + sig[i];
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99 } else if (sig[i].getKind() != Kind.Object) {
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100 assert sig[i].getKind().toBoxedJavaClass() == arg.getClass() : method.format("%H.%n(%p): expected arg ") + i + " to be " + sig[i] + ", not " + arg.getClass();
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101 }
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102 }
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103 return true;
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104 }
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105
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106 @Override
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107 public Object executeVarargs(Object... args) throws InvalidInstalledCodeException {
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108 assert checkArgs(args);
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109 assert !isExternal();
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110 return runtime().getCompilerToVM().executeCompiledMethodVarargs(args, this);
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111 }
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112
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113 @Override
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114 public long getStart() {
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115 return isValid() ? super.getStart() : 0;
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116 }
fe9a18fbb15e added subclasses for HotSpotInstalledCode: HotSpotNmethod and HotSpotRuntimeStub
Doug Simon <doug.simon@oracle.com>
parents:
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117 }