Mercurial > hg > truffle
annotate src/share/vm/oops/symbolKlass.cpp @ 2045:9c96c873c42b
Fix includes to match new hotspot mechanism.
| author | Thomas Wuerthinger <wuerthinger@ssw.jku.at> |
|---|---|
| date | Fri, 07 Jan 2011 18:45:09 +0100 |
| parents | f95d63e2154a |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/symbolTable.hpp" | |
| 27 #include "memory/gcLocker.hpp" | |
| 28 #include "oops/oop.inline.hpp" | |
| 29 #include "oops/symbolKlass.hpp" | |
| 30 #include "oops/symbolOop.hpp" | |
| 31 #include "runtime/handles.inline.hpp" | |
| 0 | 32 |
| 33 symbolOop symbolKlass::allocate_symbol(u1* name, int len, TRAPS) { | |
| 34 // Don't allow symbol oops to be created which cannot fit in a symbolOop. | |
| 35 if (len > symbolOopDesc::max_length()) { | |
| 36 THROW_MSG_0(vmSymbols::java_lang_InternalError(), | |
| 37 "name is too long to represent"); | |
| 38 } | |
| 39 int size = symbolOopDesc::object_size(len); | |
| 40 symbolKlassHandle h_k(THREAD, as_klassOop()); | |
| 41 symbolOop sym = (symbolOop) | |
| 42 CollectedHeap::permanent_obj_allocate(h_k, size, CHECK_NULL); | |
| 43 assert(!sym->is_parsable(), "not expecting parsability yet."); | |
| 44 No_Safepoint_Verifier no_safepoint; | |
| 45 sym->set_utf8_length(len); | |
| 46 for (int i = 0; i < len; i++) { | |
| 47 sym->byte_at_put(i, name[i]); | |
| 48 } | |
| 49 // Let the first emptySymbol be created and | |
| 50 // ensure only one is ever created. | |
| 51 assert(sym->is_parsable() || Universe::emptySymbol() == NULL, | |
| 52 "should be parsable here."); | |
| 53 return sym; | |
| 54 } | |
| 55 | |
| 56 bool symbolKlass::allocate_symbols(int names_count, const char** names, | |
| 57 int* lengths, symbolOop* sym_oops, TRAPS) { | |
| 58 if (UseConcMarkSweepGC || UseParallelGC) { | |
| 59 // Concurrent GC needs to mark all the allocated symbol oops after | |
| 60 // the remark phase which isn't done below (except the first symbol oop). | |
| 61 // So return false which will let the symbols be allocated one by one. | |
| 62 // The parallel collector uses an object start array to find the | |
| 63 // start of objects on a dirty card. The object start array is not | |
| 64 // updated for the start of each symbol so is not precise. During | |
| 65 // object array verification this causes a verification failure. | |
| 66 // In a product build this causes extra searching for the start of | |
| 67 // a symbol. As with the concurrent collector a return of false will | |
| 68 // cause each symbol to be allocated separately and in the case | |
| 69 // of the parallel collector will cause the object | |
| 70 // start array to be updated. | |
| 71 return false; | |
| 72 } | |
| 73 | |
| 74 assert(names_count > 0, "can't allocate 0 symbols"); | |
| 75 | |
| 76 int total_size = 0; | |
| 77 int i, sizes[SymbolTable::symbol_alloc_batch_size]; | |
| 78 for (i=0; i<names_count; i++) { | |
| 79 int len = lengths[i]; | |
| 80 if (len > symbolOopDesc::max_length()) { | |
| 81 return false; | |
| 82 } | |
| 83 int sz = symbolOopDesc::object_size(len); | |
| 84 sizes[i] = sz * HeapWordSize; | |
| 85 total_size += sz; | |
| 86 } | |
| 87 symbolKlassHandle h_k(THREAD, as_klassOop()); | |
| 88 HeapWord* base = Universe::heap()->permanent_mem_allocate(total_size); | |
| 89 if (base == NULL) { | |
| 90 return false; | |
| 91 } | |
| 92 | |
| 93 // CAN'T take any safepoint during the initialization of the symbol oops ! | |
| 94 No_Safepoint_Verifier nosafepoint; | |
| 95 | |
| 96 klassOop sk = h_k(); | |
| 97 int pos = 0; | |
| 98 for (i=0; i<names_count; i++) { | |
| 99 symbolOop s = (symbolOop) (((char*)base) + pos); | |
| 100 s->set_mark(markOopDesc::prototype()); | |
| 101 s->set_klass(sk); | |
| 102 s->set_utf8_length(lengths[i]); | |
| 103 const char* name = names[i]; | |
| 104 for (int j=0; j<lengths[i]; j++) { | |
| 105 s->byte_at_put(j, name[j]); | |
| 106 } | |
| 107 | |
| 108 assert(s->is_parsable(), "should be parsable here."); | |
| 109 | |
| 110 sym_oops[i] = s; | |
| 111 pos += sizes[i]; | |
| 112 } | |
| 113 return true; | |
| 114 } | |
| 115 | |
| 116 klassOop symbolKlass::create_klass(TRAPS) { | |
| 117 symbolKlass o; | |
| 118 KlassHandle h_this_klass(THREAD, Universe::klassKlassObj()); | |
| 119 KlassHandle k = base_create_klass(h_this_klass, header_size(), o.vtbl_value(), CHECK_NULL); | |
| 120 // Make sure size calculation is right | |
| 121 assert(k()->size() == align_object_size(header_size()), "wrong size for object"); | |
| 122 // java_lang_Class::create_mirror(k, CHECK_NULL); // Allocate mirror | |
| 123 return k(); | |
| 124 } | |
| 125 | |
| 126 int symbolKlass::oop_size(oop obj) const { | |
| 127 assert(obj->is_symbol(),"must be a symbol"); | |
| 128 symbolOop s = symbolOop(obj); | |
| 129 int size = s->object_size(); | |
| 130 return size; | |
| 131 } | |
| 132 | |
| 133 bool symbolKlass::oop_is_parsable(oop obj) const { | |
| 134 assert(obj->is_symbol(),"must be a symbol"); | |
| 135 symbolOop s = symbolOop(obj); | |
| 136 return s->object_is_parsable(); | |
| 137 } | |
| 138 | |
| 139 void symbolKlass::oop_follow_contents(oop obj) { | |
| 140 assert (obj->is_symbol(), "object must be symbol"); | |
| 141 // Performance tweak: We skip iterating over the klass pointer since we | |
| 142 // know that Universe::symbolKlassObj never moves. | |
| 143 // Note: do not follow next link here (see SymbolTable::follow_contents) | |
| 144 } | |
| 145 | |
| 146 #ifndef SERIALGC | |
| 147 void symbolKlass::oop_follow_contents(ParCompactionManager* cm, oop obj) { | |
| 148 assert (obj->is_symbol(), "object must be symbol"); | |
| 149 // Performance tweak: We skip iterating over the klass pointer since we | |
| 150 // know that Universe::symbolKlassObj never moves. | |
| 151 // Note: do not follow next link here (see SymbolTable::follow_contents) | |
| 152 } | |
| 153 #endif // SERIALGC | |
| 154 | |
| 155 int symbolKlass::oop_oop_iterate(oop obj, OopClosure* blk) { | |
| 156 assert(obj->is_symbol(), "object must be symbol"); | |
| 157 symbolOop s = symbolOop(obj); | |
| 158 // Get size before changing pointers. | |
| 159 // Don't call size() or oop_size() since that is a virtual call. | |
| 160 int size = s->object_size(); | |
| 161 // Performance tweak: We skip iterating over the klass pointer since we | |
| 162 // know that Universe::symbolKlassObj never moves. | |
| 163 return size; | |
| 164 } | |
| 165 | |
| 166 | |
| 167 int symbolKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { | |
| 168 assert(obj->is_symbol(), "object must be symbol"); | |
| 169 symbolOop s = symbolOop(obj); | |
| 170 // Get size before changing pointers. | |
| 171 // Don't call size() or oop_size() since that is a virtual call. | |
| 172 int size = s->object_size(); | |
| 173 // Performance tweak: We skip iterating over the klass pointer since we | |
| 174 // know that Universe::symbolKlassObj never moves. | |
| 175 return size; | |
| 176 } | |
| 177 | |
| 178 | |
| 179 int symbolKlass::oop_adjust_pointers(oop obj) { | |
| 180 assert(obj->is_symbol(), "should be symbol"); | |
| 181 symbolOop s = symbolOop(obj); | |
| 182 // Get size before changing pointers. | |
| 183 // Don't call size() or oop_size() since that is a virtual call. | |
| 184 int size = s->object_size(); | |
| 185 // Performance tweak: We skip iterating over the klass pointer since we | |
| 186 // know that Universe::symbolKlassObj never moves. | |
| 187 return size; | |
| 188 } | |
| 189 | |
| 190 | |
| 191 #ifndef SERIALGC | |
| 192 void symbolKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { | |
| 193 assert(obj->is_symbol(), "should be symbol"); | |
| 194 } | |
| 195 | |
| 196 int symbolKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { | |
| 197 assert(obj->is_symbol(), "should be symbol"); | |
| 198 return symbolOop(obj)->object_size(); | |
| 199 } | |
| 200 | |
| 201 int symbolKlass::oop_update_pointers(ParCompactionManager* cm, oop obj, | |
| 202 HeapWord* beg_addr, HeapWord* end_addr) { | |
| 203 assert(obj->is_symbol(), "should be symbol"); | |
| 204 return symbolOop(obj)->object_size(); | |
| 205 } | |
| 206 #endif // SERIALGC | |
| 207 | |
| 208 #ifndef PRODUCT | |
| 209 // Printing | |
| 210 | |
| 211 void symbolKlass::oop_print_on(oop obj, outputStream* st) { | |
| 212 st->print("Symbol: '"); | |
| 222 | 213 symbolOop(obj)->print_symbol_on(st); |
| 0 | 214 st->print("'"); |
| 215 } | |
| 216 | |
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217 #endif //PRODUCT |
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218 |
| 0 | 219 void symbolKlass::oop_print_value_on(oop obj, outputStream* st) { |
| 220 symbolOop sym = symbolOop(obj); | |
| 221 st->print("'"); | |
| 222 for (int i = 0; i < sym->utf8_length(); i++) { | |
| 223 st->print("%c", sym->byte_at(i)); | |
| 224 } | |
| 225 st->print("'"); | |
| 226 } | |
| 227 | |
| 228 const char* symbolKlass::internal_name() const { | |
| 229 return "{symbol}"; | |
| 230 } |