Mercurial > hg > truffle
annotate src/share/vm/ci/ciInstanceKlass.hpp @ 113:ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
| author | coleenp |
|---|---|
| date | Sun, 13 Apr 2008 17:43:42 -0400 |
| parents | 52fed2ec0afb |
| children | d1605aabd0a1 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * Copyright 1999-2007 Sun Microsystems, Inc. All Rights Reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 // ciInstanceKlass | |
| 26 // | |
| 27 // This class represents a klassOop in the HotSpot virtual machine | |
| 28 // whose Klass part is an instanceKlass. It may or may not | |
| 29 // be loaded. | |
| 30 class ciInstanceKlass : public ciKlass { | |
| 31 CI_PACKAGE_ACCESS | |
| 32 friend class ciEnv; | |
| 33 friend class ciMethod; | |
| 34 friend class ciField; | |
| 35 friend class ciBytecodeStream; | |
| 36 | |
| 37 private: | |
| 38 jobject _loader; | |
| 39 jobject _protection_domain; | |
| 40 | |
|
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41 bool _is_shared; |
| 0 | 42 bool _is_initialized; |
| 43 bool _is_linked; | |
| 44 bool _has_finalizer; | |
| 45 bool _has_subklass; | |
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46 bool _has_nonstatic_fields; |
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47 |
| 0 | 48 ciFlags _flags; |
| 49 jint _nonstatic_field_size; | |
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50 jint _nonstatic_oop_map_size; |
| 0 | 51 |
| 52 // Lazy fields get filled in only upon request. | |
| 53 ciInstanceKlass* _super; | |
| 54 ciInstance* _java_mirror; | |
| 55 | |
| 56 ciConstantPoolCache* _field_cache; // cached map index->field | |
| 57 GrowableArray<ciField*>* _nonstatic_fields; | |
| 58 | |
| 59 enum { implementors_limit = instanceKlass::implementors_limit }; | |
| 60 ciInstanceKlass* _implementors[implementors_limit]; | |
| 61 jint _nof_implementors; | |
| 62 | |
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63 GrowableArray<ciField*>* _non_static_fields; |
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64 |
| 0 | 65 protected: |
| 66 ciInstanceKlass(KlassHandle h_k); | |
| 67 ciInstanceKlass(ciSymbol* name, jobject loader, jobject protection_domain); | |
| 68 | |
| 69 instanceKlass* get_instanceKlass() const { | |
| 70 return (instanceKlass*)get_Klass(); | |
| 71 } | |
| 72 | |
| 73 oop loader(); | |
| 74 jobject loader_handle(); | |
| 75 | |
| 76 oop protection_domain(); | |
| 77 jobject protection_domain_handle(); | |
| 78 | |
| 79 const char* type_string() { return "ciInstanceKlass"; } | |
| 80 | |
| 81 void print_impl(outputStream* st); | |
| 82 | |
| 83 ciConstantPoolCache* field_cache(); | |
| 84 | |
| 85 bool is_shared() { return _is_shared; } | |
| 86 | |
| 87 bool compute_shared_is_initialized(); | |
| 88 bool compute_shared_is_linked(); | |
| 89 bool compute_shared_has_subklass(); | |
| 90 int compute_shared_nof_implementors(); | |
| 91 int compute_nonstatic_fields(); | |
| 92 GrowableArray<ciField*>* compute_nonstatic_fields_impl(GrowableArray<ciField*>* super_fields); | |
| 93 | |
| 94 public: | |
| 95 // Has this klass been initialized? | |
| 96 bool is_initialized() { | |
| 97 if (_is_shared && !_is_initialized) { | |
| 98 return is_loaded() && compute_shared_is_initialized(); | |
| 99 } | |
| 100 return _is_initialized; | |
| 101 } | |
| 102 // Has this klass been linked? | |
| 103 bool is_linked() { | |
| 104 if (_is_shared && !_is_linked) { | |
| 105 return is_loaded() && compute_shared_is_linked(); | |
| 106 } | |
| 107 return _is_linked; | |
| 108 } | |
| 109 | |
| 110 // General klass information. | |
| 111 ciFlags flags() { | |
| 112 assert(is_loaded(), "must be loaded"); | |
| 113 return _flags; | |
| 114 } | |
| 115 bool has_finalizer() { | |
| 116 assert(is_loaded(), "must be loaded"); | |
| 117 return _has_finalizer; } | |
| 118 bool has_subklass() { | |
| 119 assert(is_loaded(), "must be loaded"); | |
| 120 if (_is_shared && !_has_subklass) { | |
| 121 if (flags().is_final()) { | |
| 122 return false; | |
| 123 } else { | |
| 124 return compute_shared_has_subklass(); | |
| 125 } | |
| 126 } | |
| 127 return _has_subklass; | |
| 128 } | |
| 129 jint size_helper() { | |
| 130 return (Klass::layout_helper_size_in_bytes(layout_helper()) | |
| 131 >> LogHeapWordSize); | |
| 132 } | |
| 133 jint nonstatic_field_size() { | |
| 134 assert(is_loaded(), "must be loaded"); | |
| 135 return _nonstatic_field_size; } | |
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136 jint has_nonstatic_fields() { |
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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137 assert(is_loaded(), "must be loaded"); |
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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138 return _has_nonstatic_fields; } |
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139 jint nonstatic_oop_map_size() { |
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140 assert(is_loaded(), "must be loaded"); |
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141 return _nonstatic_oop_map_size; } |
| 0 | 142 ciInstanceKlass* super(); |
| 143 jint nof_implementors() { | |
| 144 assert(is_loaded(), "must be loaded"); | |
| 145 if (_is_shared) return compute_shared_nof_implementors(); | |
| 146 return _nof_implementors; | |
| 147 } | |
| 148 | |
| 149 ciInstanceKlass* get_canonical_holder(int offset); | |
| 150 ciField* get_field_by_offset(int field_offset, bool is_static); | |
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151 |
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152 GrowableArray<ciField*>* non_static_fields(); |
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153 |
| 0 | 154 // total number of nonstatic fields (including inherited): |
| 155 int nof_nonstatic_fields() { | |
| 156 if (_nonstatic_fields == NULL) | |
| 157 return compute_nonstatic_fields(); | |
| 158 else | |
| 159 return _nonstatic_fields->length(); | |
| 160 } | |
| 161 // nth nonstatic field (presented by ascending address) | |
| 162 ciField* nonstatic_field_at(int i) { | |
| 163 assert(_nonstatic_fields != NULL, ""); | |
| 164 return _nonstatic_fields->at(i); | |
| 165 } | |
| 166 | |
| 167 ciInstanceKlass* unique_concrete_subklass(); | |
| 168 bool has_finalizable_subclass(); | |
| 169 | |
| 170 bool contains_field_offset(int offset) { | |
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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171 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); |
| 0 | 172 } |
| 173 | |
| 174 // Get the instance of java.lang.Class corresponding to | |
| 175 // this klass. This instance is used for locking of | |
| 176 // synchronized static methods of this klass. | |
| 177 ciInstance* java_mirror(); | |
| 178 | |
| 179 // Java access flags | |
| 180 bool is_public () { return flags().is_public(); } | |
| 181 bool is_final () { return flags().is_final(); } | |
| 182 bool is_super () { return flags().is_super(); } | |
| 183 bool is_interface () { return flags().is_interface(); } | |
| 184 bool is_abstract () { return flags().is_abstract(); } | |
| 185 | |
| 186 ciMethod* find_method(ciSymbol* name, ciSymbol* signature); | |
| 187 // Note: To find a method from name and type strings, use ciSymbol::make, | |
| 188 // but consider adding to vmSymbols.hpp instead. | |
| 189 | |
| 190 bool is_leaf_type(); | |
| 191 ciInstanceKlass* implementor(int n); | |
| 192 | |
| 193 // Is the defining class loader of this class the default loader? | |
| 194 bool uses_default_loader(); | |
| 195 | |
| 196 bool is_java_lang_Object(); | |
| 197 | |
| 198 // What kind of ciObject is this? | |
| 199 bool is_instance_klass() { return true; } | |
| 200 bool is_java_klass() { return true; } | |
| 201 }; |