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annotate src/share/vm/ci/ciMetadata.hpp @ 8733:9def4075da6d

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8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord Summary: Update the task local finger to the start of the next object when marking aborts, in order to avoid the redundant scanning of all 0's when the marking task restarts, if otherwise updating to the next word. In addition, reuse the routine nextObject() in routine iterate(). Reviewed-by: johnc, ysr Contributed-by: tamao <tao.mao@oracle.com>
author tamao
date Tue, 05 Mar 2013 15:36:56 -0800
parents bd7a7ce2e264
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1 /*
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2 * Copyright (c) 1999, 2012, 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 */
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24
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25 #ifndef SHARE_VM_CI_CIMETADATA_HPP
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26 #define SHARE_VM_CI_CIMETADATA_HPP
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27
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28 #include "ci/ciBaseObject.hpp"
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29 #include "ci/ciClassList.hpp"
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30 #include "memory/allocation.hpp"
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31 #include "runtime/handles.hpp"
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32 #include "runtime/jniHandles.hpp"
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33
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34 // ciMetadata
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35 //
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36 // Compiler interface to metadata object in the VM, not Java object.
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37
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38 class ciMetadata: public ciBaseObject {
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39 CI_PACKAGE_ACCESS
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40 friend class ciEnv;
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41
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42 protected:
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43 Metadata* _metadata;
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44
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45 ciMetadata(): _metadata(NULL) {}
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46 ciMetadata(Metadata* o): _metadata(o) {}
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47
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48 virtual bool is_classless() const { return false; }
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49 public:
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50 bool is_loaded() const { return _metadata != NULL || is_classless(); }
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51
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52 virtual bool is_metadata() const { return true; }
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53
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54 virtual bool is_type() const { return false; }
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55 virtual bool is_cpcache() const { return false; }
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56 virtual bool is_return_address() const { return false; }
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57 virtual bool is_method() const { return false; }
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58 virtual bool is_method_data() const { return false; }
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59 virtual bool is_klass() const { return false; }
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60 virtual bool is_instance_klass() const { return false; }
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61 virtual bool is_array_klass() const { return false; }
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62 virtual bool is_obj_array_klass() const { return false; }
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63 virtual bool is_type_array_klass() const { return false; }
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64 virtual void dump_replay_data(outputStream* st) { /* do nothing */ }
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65
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66 ciMethod* as_method() {
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67 assert(is_method(), "bad cast");
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68 return (ciMethod*)this;
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69 }
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70 ciMethodData* as_method_data() {
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71 assert(is_method_data(), "bad cast");
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72 return (ciMethodData*)this;
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73 }
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74 ciSymbol* as_symbol() {
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75 assert(is_symbol(), "bad cast");
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76 return (ciSymbol*)this;
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77 }
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78 ciType* as_type() {
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79 assert(is_type(), "bad cast");
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80 return (ciType*)this;
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81 }
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82 ciReturnAddress* as_return_address() {
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83 assert(is_return_address(), "bad cast");
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84 return (ciReturnAddress*)this;
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85 }
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86 ciKlass* as_klass() {
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87 assert(is_klass(), "bad cast");
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88 return (ciKlass*)this;
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89 }
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90 ciInstanceKlass* as_instance_klass() {
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91 assert(is_instance_klass(), "bad cast");
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92 return (ciInstanceKlass*)this;
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93 }
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94 ciArrayKlass* as_array_klass() {
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95 assert(is_array_klass(), "bad cast");
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96 return (ciArrayKlass*)this;
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97 }
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98 ciObjArrayKlass* as_obj_array_klass() {
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99 assert(is_obj_array_klass(), "bad cast");
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100 return (ciObjArrayKlass*)this;
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101 }
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102 ciTypeArrayKlass* as_type_array_klass() {
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103 assert(is_type_array_klass(), "bad cast");
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104 return (ciTypeArrayKlass*)this;
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105 }
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106
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107 Metadata* constant_encoding() { return _metadata; }
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108
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109 bool equals(ciMetadata* obj) const { return (this == obj); }
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110
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111 int hash() { return ident() * 31; } // ???
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112
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113 void print(outputStream* st);
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114 virtual void print_impl(outputStream* st) {}
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115 virtual const char* type_string() { return "ciMetadata"; }
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116
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117 void print() { print(tty); }
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118 void print_metadata(outputStream* st = tty);
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119
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120 };
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121 #endif // SHARE_VM_CI_CIMETADATA_HPP