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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/jvmci/HotSpotNmethod.java @ 21548:f4b3a6dadb44

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moved Receiver inner class from MethodIdMap to InvocationPlugin (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Tue, 26 May 2015 11:19:50 +0200
parents 543957c1c6a6
children
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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.jvmci;
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24
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25 import static com.oracle.graal.hotspot.jvmci.HotSpotJVMCIRuntime.*;
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26
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27 import com.oracle.graal.api.code.*;
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28 import com.oracle.graal.api.meta.*;
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29
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30 /**
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31 * Implementation of {@link InstalledCode} for code installed as an nmethod. The nmethod stores a
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32 * weak reference to an instance of this class. This is necessary to keep the nmethod from being
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33 * unloaded while the associated {@link HotSpotNmethod} instance is alive.
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34 * <p>
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35 * Note that there is no (current) way for the reference from an nmethod to a {@link HotSpotNmethod}
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36 * instance to be anything but weak. This is due to the fact that HotSpot does not treat nmethods as
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37 * strong GC roots.
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38 */
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39 public class HotSpotNmethod extends HotSpotInstalledCode {
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40
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41 /**
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42 * This (indirect) Method* reference is safe since class redefinition preserves all methods
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43 * associated with nmethods in the code cache.
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44 */
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45 private final HotSpotResolvedJavaMethod method;
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46
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47 private final boolean isDefault;
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48 private final boolean isExternal;
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49
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50 public HotSpotNmethod(HotSpotResolvedJavaMethod method, String name, boolean isDefault) {
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51 this(method, name, isDefault, false);
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52 }
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53
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54 public HotSpotNmethod(HotSpotResolvedJavaMethod method, String name, boolean isDefault, boolean isExternal) {
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55 super(name);
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56 this.method = method;
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57 this.isDefault = isDefault;
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58 this.isExternal = isExternal;
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59 }
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60
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61 public boolean isDefault() {
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62 return isDefault;
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63 }
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64
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65 public boolean isExternal() {
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66 return isExternal;
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67 }
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68
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69 public ResolvedJavaMethod getMethod() {
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70 return method;
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71 }
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72
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73 @Override
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74 public void invalidate() {
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75 runtime().getCompilerToVM().invalidateInstalledCode(this);
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76 }
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77
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78 @Override
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79 public String toString() {
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80 return String.format("InstalledNmethod[method=%s, codeBlob=0x%x, isDefault=%b, name=%s]", method, getAddress(), isDefault, name);
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81 }
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82
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83 protected boolean checkThreeObjectArgs() {
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84 assert method.getSignature().getParameterCount(!method.isStatic()) == 3;
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85 assert method.getSignature().getParameterKind(0) == Kind.Object;
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86 assert method.getSignature().getParameterKind(1) == Kind.Object;
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87 assert !method.isStatic() || method.getSignature().getParameterKind(2) == Kind.Object;
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88 return true;
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89 }
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90
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91 private boolean checkArgs(Object... args) {
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92 JavaType[] sig = method.toParameterTypes();
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93 assert args.length == sig.length : method.format("%H.%n(%p): expected ") + sig.length + " args, got " + args.length;
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94 for (int i = 0; i < sig.length; i++) {
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95 Object arg = args[i];
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96 if (arg == null) {
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97 assert sig[i].getKind() == Kind.Object : method.format("%H.%n(%p): expected arg ") + i + " to be Object, not " + sig[i];
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98 } else if (sig[i].getKind() != Kind.Object) {
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99 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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100 }
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101 }
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102 return true;
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103 }
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104
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105 @Override
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106 public Object executeVarargs(Object... args) throws InvalidInstalledCodeException {
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107 assert checkArgs(args);
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108 assert !isExternal();
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109 return runtime().getCompilerToVM().executeCompiledMethodVarargs(args, this);
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110 }
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111
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112 @Override
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113 public long getStart() {
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114 return isValid() ? super.getStart() : 0;
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115 }
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116 }