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annotate jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotMethodDataAccessor.java @ 23717:41fa89f93355

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removed jdk.vm.ci.hotspot.HotSpotMethodDataAccessor.Tag (JDK-8159613)
author Doug Simon <doug.simon@oracle.com>
date Thu, 30 Jun 2016 22:07:57 +0200
parents 4b58c92e939b
children a52d7039723b
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1bbd4a7c274b Rename jdk.internal.jvmci to jdk.vm.ci
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parents: 22581
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1 package jdk.vm.ci.hotspot;
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2
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3 import jdk.vm.ci.meta.JavaMethodProfile;
1bbd4a7c274b Rename jdk.internal.jvmci to jdk.vm.ci
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parents: 22581
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4 import jdk.vm.ci.meta.JavaTypeProfile;
1bbd4a7c274b Rename jdk.internal.jvmci to jdk.vm.ci
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parents: 22581
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5 import jdk.vm.ci.meta.ProfilingInfo;
1bbd4a7c274b Rename jdk.internal.jvmci to jdk.vm.ci
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6 import jdk.vm.ci.meta.TriState;
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7
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8 /**
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9 * Base class for accessing the different kinds of data in a HotSpot {@code MethodData}. This is
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10 * similar to {@link ProfilingInfo}, but most methods require a {@link HotSpotMethodData} and the
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11 * exact position within the method data.
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12 */
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13 abstract class HotSpotMethodDataAccessor {
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15 final int tag;
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16 final int staticSize;
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17 final HotSpotVMConfig config;
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18
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19 protected HotSpotMethodDataAccessor(HotSpotVMConfig config, int tag, int staticSize) {
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20 this.config = config;
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21 this.tag = tag;
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22 this.staticSize = staticSize;
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23 }
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25 /**
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26 * Returns the tag stored in the LayoutData header.
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27 *
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28 * @return tag stored in the LayoutData header
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29 */
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30 int getTag() {
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31 return tag;
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32 }
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33
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34 static int readTag(HotSpotVMConfig config, HotSpotMethodData data, int position) {
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35 final int tag = data.readUnsignedByte(position, config.dataLayoutTagOffset);
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36 assert tag >= config.dataLayoutNoTag && tag <= config.dataLayoutSpeculativeTrapDataTag : "profile data tag out of bounds: " + tag;
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37 return tag;
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38 }
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40 /**
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41 * Returns the BCI stored in the LayoutData header.
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42 *
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43 * @return an integer between 0 and {@link Short#MAX_VALUE} inclusive, or -1 if not supported
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44 */
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45 int getBCI(HotSpotMethodData data, int position) {
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46 return data.readUnsignedShort(position, config.dataLayoutBCIOffset);
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47 }
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48
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49 /**
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50 * Computes the size for the specific data at the given position.
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51 *
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52 * @return a value greater than 0
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53 */
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54 final int getSize(HotSpotMethodData data, int position) {
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55 int size = staticSize + getDynamicSize(data, position);
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56 // Sanity check against VM
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57 int vmSize = HotSpotJVMCIRuntime.runtime().compilerToVm.methodDataProfileDataSize(data.metaspaceMethodData, position);
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58 assert size == vmSize : size + " != " + vmSize;
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59 return size;
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60 }
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61
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62 TriState getExceptionSeen(HotSpotMethodData data, int position) {
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63 final int exceptionsMask = 1 << config.bitDataExceptionSeenFlag;
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64 return TriState.get((getFlags(data, position) & exceptionsMask) != 0);
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65 }
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66
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67 /**
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68 * @param data
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69 * @param position
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70 */
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71 JavaTypeProfile getTypeProfile(HotSpotMethodData data, int position) {
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72 return null;
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73 }
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74
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75 /**
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76 * @param data
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77 * @param position
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78 */
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79 JavaMethodProfile getMethodProfile(HotSpotMethodData data, int position) {
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80 return null;
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81 }
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82
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83 /**
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84 * @param data
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85 * @param position
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86 */
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87 double getBranchTakenProbability(HotSpotMethodData data, int position) {
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88 return -1;
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89 }
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90
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91 /**
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92 * @param data
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93 * @param position
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94 */
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95 double[] getSwitchProbabilities(HotSpotMethodData data, int position) {
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96 return null;
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97 }
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98
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99 /**
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100 * @param data
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101 * @param position
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102 */
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103 int getExecutionCount(HotSpotMethodData data, int position) {
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104 return -1;
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105 }
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106
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107 /**
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108 * @param data
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109 * @param position
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110 */
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111 TriState getNullSeen(HotSpotMethodData data, int position) {
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112 return TriState.UNKNOWN;
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113 }
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114
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115 protected int getFlags(HotSpotMethodData data, int position) {
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116 return data.readUnsignedByte(position, config.dataLayoutFlagsOffset);
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117 }
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5e3d1a68664e applied mx eclipseformat to all Java files
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118
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119 /**
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120 * @param data
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121 * @param position
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122 */
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parents: 23297
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123 protected int getDynamicSize(HotSpotMethodData data, int position) {
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124 return 0;
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125 }
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127 abstract StringBuilder appendTo(StringBuilder sb, HotSpotMethodData data, int pos);
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128
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f7251c729b31 profiling info first try
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129 }