Fri, 23 Mar 2012 11:16:05 -0400
7150058: Allocate symbols from null boot loader to an arena for NMT
Summary: Move symbol allocation to an arena so NMT doesn't have to track them at startup.
Reviewed-by: never, kamg, zgu
duke@435 | 1 | /* |
coleenp@3682 | 2 | * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #include "precompiled.hpp" |
stefank@2314 | 26 | #include "classfile/javaClasses.hpp" |
stefank@2314 | 27 | #include "classfile/systemDictionary.hpp" |
stefank@2314 | 28 | #include "gc_implementation/shared/markSweep.inline.hpp" |
stefank@2314 | 29 | #include "gc_interface/collectedHeap.inline.hpp" |
stefank@2314 | 30 | #include "oops/instanceKlass.hpp" |
stefank@2314 | 31 | #include "oops/objArrayKlassKlass.hpp" |
stefank@2314 | 32 | #include "oops/oop.inline.hpp" |
stefank@2314 | 33 | #include "oops/oop.inline2.hpp" |
never@2658 | 34 | #ifndef SERIALGC |
never@2658 | 35 | #include "gc_implementation/parNew/parOopClosures.inline.hpp" |
never@2658 | 36 | #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" |
never@2658 | 37 | #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" |
never@2658 | 38 | #include "memory/cardTableRS.hpp" |
never@2658 | 39 | #include "oops/oop.pcgc.inline.hpp" |
never@2658 | 40 | #endif |
duke@435 | 41 | |
duke@435 | 42 | klassOop objArrayKlassKlass::create_klass(TRAPS) { |
duke@435 | 43 | objArrayKlassKlass o; |
duke@435 | 44 | KlassHandle h_this_klass(THREAD, Universe::klassKlassObj()); |
duke@435 | 45 | KlassHandle k = base_create_klass(h_this_klass, header_size(), o.vtbl_value(), CHECK_0); |
duke@435 | 46 | assert(k()->size() == align_object_size(header_size()), "wrong size for object"); |
duke@435 | 47 | java_lang_Class::create_mirror(k, CHECK_0); // Allocate mirror |
duke@435 | 48 | return k(); |
duke@435 | 49 | } |
duke@435 | 50 | |
duke@435 | 51 | klassOop objArrayKlassKlass::allocate_system_objArray_klass(TRAPS) { |
duke@435 | 52 | // system_objArrays have no instance klass, so allocate with fake class, then reset to NULL |
duke@435 | 53 | KlassHandle kk(THREAD, Universe::intArrayKlassObj()); |
duke@435 | 54 | klassOop k = allocate_objArray_klass(1, kk, CHECK_0); |
duke@435 | 55 | objArrayKlass* tk = (objArrayKlass*) k->klass_part(); |
duke@435 | 56 | tk->set_element_klass(NULL); |
duke@435 | 57 | tk->set_bottom_klass(NULL); |
duke@435 | 58 | return k; |
duke@435 | 59 | } |
duke@435 | 60 | |
duke@435 | 61 | |
duke@435 | 62 | klassOop objArrayKlassKlass::allocate_objArray_klass(int n, KlassHandle element_klass, TRAPS) { |
duke@435 | 63 | objArrayKlassKlassHandle this_oop(THREAD, as_klassOop()); |
duke@435 | 64 | return allocate_objArray_klass_impl(this_oop, n, element_klass, THREAD); |
duke@435 | 65 | } |
duke@435 | 66 | |
duke@435 | 67 | klassOop objArrayKlassKlass::allocate_objArray_klass_impl(objArrayKlassKlassHandle this_oop, |
duke@435 | 68 | int n, KlassHandle element_klass, TRAPS) { |
duke@435 | 69 | |
duke@435 | 70 | // Eagerly allocate the direct array supertype. |
duke@435 | 71 | KlassHandle super_klass = KlassHandle(); |
duke@435 | 72 | if (!Universe::is_bootstrapping()) { |
duke@435 | 73 | KlassHandle element_super (THREAD, element_klass->super()); |
duke@435 | 74 | if (element_super.not_null()) { |
duke@435 | 75 | // The element type has a direct super. E.g., String[] has direct super of Object[]. |
duke@435 | 76 | super_klass = KlassHandle(THREAD, element_super->array_klass_or_null()); |
duke@435 | 77 | bool supers_exist = super_klass.not_null(); |
duke@435 | 78 | // Also, see if the element has secondary supertypes. |
duke@435 | 79 | // We need an array type for each. |
duke@435 | 80 | objArrayHandle element_supers = objArrayHandle(THREAD, |
duke@435 | 81 | element_klass->secondary_supers()); |
duke@435 | 82 | for( int i = element_supers->length()-1; i >= 0; i-- ) { |
duke@435 | 83 | klassOop elem_super = (klassOop) element_supers->obj_at(i); |
duke@435 | 84 | if (Klass::cast(elem_super)->array_klass_or_null() == NULL) { |
duke@435 | 85 | supers_exist = false; |
duke@435 | 86 | break; |
duke@435 | 87 | } |
duke@435 | 88 | } |
duke@435 | 89 | if (!supers_exist) { |
duke@435 | 90 | // Oops. Not allocated yet. Back out, allocate it, and retry. |
duke@435 | 91 | #ifndef PRODUCT |
duke@435 | 92 | if (WizardMode) { |
duke@435 | 93 | tty->print_cr("Must retry array klass creation for depth %d",n); |
duke@435 | 94 | } |
duke@435 | 95 | #endif |
duke@435 | 96 | KlassHandle ek; |
duke@435 | 97 | { |
duke@435 | 98 | MutexUnlocker mu(MultiArray_lock); |
duke@435 | 99 | MutexUnlocker mc(Compile_lock); // for vtables |
duke@435 | 100 | klassOop sk = element_super->array_klass(CHECK_0); |
duke@435 | 101 | super_klass = KlassHandle(THREAD, sk); |
duke@435 | 102 | for( int i = element_supers->length()-1; i >= 0; i-- ) { |
duke@435 | 103 | KlassHandle elem_super (THREAD, element_supers->obj_at(i)); |
duke@435 | 104 | elem_super->array_klass(CHECK_0); |
duke@435 | 105 | } |
duke@435 | 106 | // Now retry from the beginning |
duke@435 | 107 | klassOop klass_oop = element_klass->array_klass(n, CHECK_0); |
duke@435 | 108 | // Create a handle because the enclosing brace, when locking |
duke@435 | 109 | // can cause a gc. Better to have this function return a Handle. |
duke@435 | 110 | ek = KlassHandle(THREAD, klass_oop); |
duke@435 | 111 | } // re-lock |
duke@435 | 112 | return ek(); |
duke@435 | 113 | } |
duke@435 | 114 | } else { |
duke@435 | 115 | // The element type is already Object. Object[] has direct super of Object. |
never@1577 | 116 | super_klass = KlassHandle(THREAD, SystemDictionary::Object_klass()); |
duke@435 | 117 | } |
duke@435 | 118 | } |
duke@435 | 119 | |
coleenp@2497 | 120 | // Create type name for klass. |
coleenp@2497 | 121 | Symbol* name = NULL; |
coleenp@2497 | 122 | if (!element_klass->oop_is_instance() || |
coleenp@2497 | 123 | (name = instanceKlass::cast(element_klass())->array_name()) == NULL) { |
duke@435 | 124 | |
duke@435 | 125 | ResourceMark rm(THREAD); |
duke@435 | 126 | char *name_str = element_klass->name()->as_C_string(); |
duke@435 | 127 | int len = element_klass->name()->utf8_length(); |
duke@435 | 128 | char *new_str = NEW_RESOURCE_ARRAY(char, len + 4); |
duke@435 | 129 | int idx = 0; |
duke@435 | 130 | new_str[idx++] = '['; |
duke@435 | 131 | if (element_klass->oop_is_instance()) { // it could be an array or simple type |
duke@435 | 132 | new_str[idx++] = 'L'; |
duke@435 | 133 | } |
duke@435 | 134 | memcpy(&new_str[idx], name_str, len * sizeof(char)); |
duke@435 | 135 | idx += len; |
duke@435 | 136 | if (element_klass->oop_is_instance()) { |
duke@435 | 137 | new_str[idx++] = ';'; |
duke@435 | 138 | } |
duke@435 | 139 | new_str[idx++] = '\0'; |
coleenp@3682 | 140 | name = SymbolTable::new_permanent_symbol(new_str, CHECK_0); |
coleenp@2497 | 141 | if (element_klass->oop_is_instance()) { |
coleenp@2497 | 142 | instanceKlass* ik = instanceKlass::cast(element_klass()); |
coleenp@2497 | 143 | ik->set_array_name(name); |
coleenp@2497 | 144 | } |
duke@435 | 145 | } |
duke@435 | 146 | |
duke@435 | 147 | objArrayKlass o; |
duke@435 | 148 | arrayKlassHandle k = arrayKlass::base_create_array_klass(o.vtbl_value(), |
duke@435 | 149 | objArrayKlass::header_size(), |
duke@435 | 150 | this_oop, |
duke@435 | 151 | CHECK_0); |
duke@435 | 152 | |
duke@435 | 153 | // Initialize instance variables |
duke@435 | 154 | objArrayKlass* oak = objArrayKlass::cast(k()); |
duke@435 | 155 | oak->set_dimension(n); |
duke@435 | 156 | oak->set_element_klass(element_klass()); |
coleenp@2497 | 157 | oak->set_name(name); |
coleenp@2497 | 158 | // decrement refcount because object arrays are not explicitly freed. The |
coleenp@2497 | 159 | // instanceKlass array_name() keeps the name counted while the klass is |
coleenp@2497 | 160 | // loaded. |
coleenp@2497 | 161 | name->decrement_refcount(); |
duke@435 | 162 | |
duke@435 | 163 | klassOop bk; |
duke@435 | 164 | if (element_klass->oop_is_objArray()) { |
duke@435 | 165 | bk = objArrayKlass::cast(element_klass())->bottom_klass(); |
duke@435 | 166 | } else { |
duke@435 | 167 | bk = element_klass(); |
duke@435 | 168 | } |
duke@435 | 169 | assert(bk != NULL && (Klass::cast(bk)->oop_is_instance() || Klass::cast(bk)->oop_is_typeArray()), "invalid bottom klass"); |
duke@435 | 170 | oak->set_bottom_klass(bk); |
duke@435 | 171 | |
duke@435 | 172 | oak->set_layout_helper(array_layout_helper(T_OBJECT)); |
duke@435 | 173 | assert(oak->oop_is_javaArray(), "sanity"); |
duke@435 | 174 | assert(oak->oop_is_objArray(), "sanity"); |
duke@435 | 175 | |
duke@435 | 176 | // Call complete_create_array_klass after all instance variables has been initialized. |
duke@435 | 177 | arrayKlass::complete_create_array_klass(k, super_klass, CHECK_0); |
duke@435 | 178 | |
duke@435 | 179 | return k(); |
duke@435 | 180 | } |
duke@435 | 181 | |
duke@435 | 182 | |
duke@435 | 183 | void objArrayKlassKlass::oop_follow_contents(oop obj) { |
duke@435 | 184 | assert(obj->is_klass(), "must be klass"); |
duke@435 | 185 | assert(klassOop(obj)->klass_part()->oop_is_objArray_slow(), "must be obj array"); |
duke@435 | 186 | |
duke@435 | 187 | objArrayKlass* oak = objArrayKlass::cast((klassOop)obj); |
duke@435 | 188 | MarkSweep::mark_and_push(oak->element_klass_addr()); |
duke@435 | 189 | MarkSweep::mark_and_push(oak->bottom_klass_addr()); |
duke@435 | 190 | |
duke@435 | 191 | arrayKlassKlass::oop_follow_contents(obj); |
duke@435 | 192 | } |
duke@435 | 193 | |
duke@435 | 194 | #ifndef SERIALGC |
duke@435 | 195 | void objArrayKlassKlass::oop_follow_contents(ParCompactionManager* cm, |
duke@435 | 196 | oop obj) { |
duke@435 | 197 | assert(obj->is_klass(), "must be klass"); |
duke@435 | 198 | assert(klassOop(obj)->klass_part()->oop_is_objArray_slow(), "must be obj array"); |
duke@435 | 199 | |
duke@435 | 200 | objArrayKlass* oak = objArrayKlass::cast((klassOop)obj); |
duke@435 | 201 | PSParallelCompact::mark_and_push(cm, oak->element_klass_addr()); |
duke@435 | 202 | PSParallelCompact::mark_and_push(cm, oak->bottom_klass_addr()); |
duke@435 | 203 | |
duke@435 | 204 | arrayKlassKlass::oop_follow_contents(cm, obj); |
duke@435 | 205 | } |
duke@435 | 206 | #endif // SERIALGC |
duke@435 | 207 | |
duke@435 | 208 | |
duke@435 | 209 | int objArrayKlassKlass::oop_adjust_pointers(oop obj) { |
duke@435 | 210 | assert(obj->is_klass(), "must be klass"); |
duke@435 | 211 | assert(klassOop(obj)->klass_part()->oop_is_objArray_slow(), "must be obj array"); |
duke@435 | 212 | |
duke@435 | 213 | objArrayKlass* oak = objArrayKlass::cast((klassOop)obj); |
duke@435 | 214 | MarkSweep::adjust_pointer(oak->element_klass_addr()); |
duke@435 | 215 | MarkSweep::adjust_pointer(oak->bottom_klass_addr()); |
duke@435 | 216 | |
duke@435 | 217 | return arrayKlassKlass::oop_adjust_pointers(obj); |
duke@435 | 218 | } |
duke@435 | 219 | |
duke@435 | 220 | |
duke@435 | 221 | |
duke@435 | 222 | int objArrayKlassKlass::oop_oop_iterate(oop obj, OopClosure* blk) { |
duke@435 | 223 | assert(obj->is_klass(), "must be klass"); |
duke@435 | 224 | assert(klassOop(obj)->klass_part()->oop_is_objArray_slow(), "must be obj array"); |
duke@435 | 225 | |
duke@435 | 226 | objArrayKlass* oak = objArrayKlass::cast((klassOop)obj); |
duke@435 | 227 | blk->do_oop(oak->element_klass_addr()); |
duke@435 | 228 | blk->do_oop(oak->bottom_klass_addr()); |
duke@435 | 229 | |
duke@435 | 230 | return arrayKlassKlass::oop_oop_iterate(obj, blk); |
duke@435 | 231 | } |
duke@435 | 232 | |
duke@435 | 233 | |
duke@435 | 234 | int |
duke@435 | 235 | objArrayKlassKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { |
duke@435 | 236 | assert(obj->is_klass(), "must be klass"); |
duke@435 | 237 | assert(klassOop(obj)->klass_part()->oop_is_objArray_slow(), "must be obj array"); |
duke@435 | 238 | |
duke@435 | 239 | objArrayKlass* oak = objArrayKlass::cast((klassOop)obj); |
duke@435 | 240 | oop* addr; |
duke@435 | 241 | addr = oak->element_klass_addr(); |
duke@435 | 242 | if (mr.contains(addr)) blk->do_oop(addr); |
duke@435 | 243 | addr = oak->bottom_klass_addr(); |
duke@435 | 244 | if (mr.contains(addr)) blk->do_oop(addr); |
duke@435 | 245 | |
never@2658 | 246 | return arrayKlassKlass::oop_oop_iterate_m(obj, blk, mr); |
duke@435 | 247 | } |
duke@435 | 248 | |
duke@435 | 249 | #ifndef SERIALGC |
duke@435 | 250 | void objArrayKlassKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { |
duke@435 | 251 | assert(obj->blueprint()->oop_is_objArrayKlass(),"must be an obj array klass"); |
never@2658 | 252 | objArrayKlass* oak = objArrayKlass::cast((klassOop)obj); |
never@2658 | 253 | oop* p = oak->element_klass_addr(); |
never@2658 | 254 | if (PSScavenge::should_scavenge(p)) { |
never@2658 | 255 | pm->claim_or_forward_depth(p); |
never@2658 | 256 | } |
never@2658 | 257 | p = oak->bottom_klass_addr(); |
never@2658 | 258 | if (PSScavenge::should_scavenge(p)) { |
never@2658 | 259 | pm->claim_or_forward_depth(p); |
never@2658 | 260 | } |
never@2658 | 261 | |
never@2658 | 262 | arrayKlassKlass::oop_push_contents(pm, obj); |
duke@435 | 263 | } |
duke@435 | 264 | |
duke@435 | 265 | int objArrayKlassKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { |
duke@435 | 266 | assert(obj->is_klass(), "must be klass"); |
duke@435 | 267 | assert(klassOop(obj)->klass_part()->oop_is_objArray_slow(), "must be obj array"); |
duke@435 | 268 | |
duke@435 | 269 | objArrayKlass* oak = objArrayKlass::cast((klassOop)obj); |
duke@435 | 270 | PSParallelCompact::adjust_pointer(oak->element_klass_addr()); |
duke@435 | 271 | PSParallelCompact::adjust_pointer(oak->bottom_klass_addr()); |
duke@435 | 272 | |
duke@435 | 273 | return arrayKlassKlass::oop_update_pointers(cm, obj); |
duke@435 | 274 | } |
duke@435 | 275 | #endif // SERIALGC |
duke@435 | 276 | |
duke@435 | 277 | #ifndef PRODUCT |
duke@435 | 278 | |
duke@435 | 279 | // Printing |
duke@435 | 280 | |
duke@435 | 281 | void objArrayKlassKlass::oop_print_on(oop obj, outputStream* st) { |
duke@435 | 282 | assert(obj->is_klass(), "must be klass"); |
duke@435 | 283 | objArrayKlass* oak = (objArrayKlass*) klassOop(obj)->klass_part(); |
duke@435 | 284 | klassKlass::oop_print_on(obj, st); |
duke@435 | 285 | st->print(" - instance klass: "); |
duke@435 | 286 | oak->element_klass()->print_value_on(st); |
duke@435 | 287 | st->cr(); |
duke@435 | 288 | } |
duke@435 | 289 | |
jrose@1590 | 290 | #endif //PRODUCT |
duke@435 | 291 | |
duke@435 | 292 | void objArrayKlassKlass::oop_print_value_on(oop obj, outputStream* st) { |
duke@435 | 293 | assert(obj->is_klass(), "must be klass"); |
duke@435 | 294 | objArrayKlass* oak = (objArrayKlass*) klassOop(obj)->klass_part(); |
duke@435 | 295 | |
duke@435 | 296 | oak->element_klass()->print_value_on(st); |
duke@435 | 297 | st->print("[]"); |
duke@435 | 298 | } |
duke@435 | 299 | |
duke@435 | 300 | const char* objArrayKlassKlass::internal_name() const { |
duke@435 | 301 | return "{object array class}"; |
duke@435 | 302 | } |
duke@435 | 303 | |
duke@435 | 304 | |
duke@435 | 305 | // Verification |
duke@435 | 306 | |
duke@435 | 307 | void objArrayKlassKlass::oop_verify_on(oop obj, outputStream* st) { |
never@2658 | 308 | arrayKlassKlass::oop_verify_on(obj, st); |
duke@435 | 309 | objArrayKlass* oak = objArrayKlass::cast((klassOop)obj); |
duke@435 | 310 | guarantee(oak->element_klass()->is_perm(), "should be in permspace"); |
duke@435 | 311 | guarantee(oak->element_klass()->is_klass(), "should be klass"); |
duke@435 | 312 | guarantee(oak->bottom_klass()->is_perm(), "should be in permspace"); |
duke@435 | 313 | guarantee(oak->bottom_klass()->is_klass(), "should be klass"); |
duke@435 | 314 | Klass* bk = Klass::cast(oak->bottom_klass()); |
duke@435 | 315 | guarantee(bk->oop_is_instance() || bk->oop_is_typeArray(), "invalid bottom klass"); |
duke@435 | 316 | } |