Mercurial > hg > graal-jvmci-8
annotate src/share/vm/oops/constantPoolKlass.cpp @ 2226:c5a923563727
6912621: iCMS: Error: assert(_markBitMap.isMarked(addr + 1),"Missing Printezis bit?")
Summary: Fix block_size_if_printezis_bits() so it does not expect the bits, only uses them when available. Fix block_size_no_stall() so it does not stall when the bits are missing such cases, letting the caller deal with zero size returns. Constant pool cache oops do not need to be unparsable or conc_unsafe after their klass pointer is installed. Some cosmetic clean-ups and some assertion checking for conc-usafety which, in the presence of class file redefinition, has no a-priori time boundedness, so all GCs must be able to safely deal with putatively conc-unsafe objects in a stop-world pause.
Reviewed-by: jmasa, johnc
| author | ysr |
|---|---|
| date | Mon, 07 Feb 2011 22:19:57 -0800 |
| parents | 3582bf76420e |
| children | e5383553fd4e |
| rev | line source |
|---|---|
| 0 | 1 /* |
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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/javaClasses.hpp" | |
| 27 #include "gc_implementation/shared/markSweep.inline.hpp" | |
| 28 #include "gc_interface/collectedHeap.inline.hpp" | |
| 29 #include "memory/oopFactory.hpp" | |
| 30 #include "memory/permGen.hpp" | |
| 31 #include "memory/universe.inline.hpp" | |
| 32 #include "oops/constantPoolKlass.hpp" | |
| 33 #include "oops/constantPoolOop.hpp" | |
| 34 #include "oops/oop.inline.hpp" | |
| 35 #include "oops/oop.inline2.hpp" | |
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36 #include "oops/symbol.hpp" |
| 1972 | 37 #include "runtime/handles.inline.hpp" |
| 38 #ifdef TARGET_OS_FAMILY_linux | |
| 39 # include "thread_linux.inline.hpp" | |
| 40 #endif | |
| 41 #ifdef TARGET_OS_FAMILY_solaris | |
| 42 # include "thread_solaris.inline.hpp" | |
| 43 #endif | |
| 44 #ifdef TARGET_OS_FAMILY_windows | |
| 45 # include "thread_windows.inline.hpp" | |
| 46 #endif | |
| 47 #ifndef SERIALGC | |
| 48 #include "gc_implementation/parNew/parOopClosures.inline.hpp" | |
| 49 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" | |
| 50 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" | |
| 51 #include "memory/cardTableRS.hpp" | |
| 52 #include "oops/oop.pcgc.inline.hpp" | |
| 53 #endif | |
| 0 | 54 |
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55 constantPoolOop constantPoolKlass::allocate(int length, bool is_conc_safe, TRAPS) { |
| 0 | 56 int size = constantPoolOopDesc::object_size(length); |
| 57 KlassHandle klass (THREAD, as_klassOop()); | |
| 58 constantPoolOop c = | |
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59 (constantPoolOop)CollectedHeap::permanent_obj_allocate(klass, size, CHECK_NULL); |
| 0 | 60 |
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61 c->set_length(length); |
| 0 | 62 c->set_tags(NULL); |
| 63 c->set_cache(NULL); | |
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64 c->set_operands(NULL); |
| 0 | 65 c->set_pool_holder(NULL); |
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66 c->set_flags(0); |
| 0 | 67 // only set to non-zero if constant pool is merged by RedefineClasses |
| 68 c->set_orig_length(0); | |
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69 // if constant pool may change during RedefineClasses, it is created |
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70 // unsafe for GC concurrent processing. |
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71 c->set_is_conc_safe(is_conc_safe); |
| 0 | 72 // all fields are initialized; needed for GC |
| 73 | |
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74 // Note: because we may be in this "conc_unsafe" state when allocating |
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75 // t_oop below, which may in turn cause a GC, it is imperative that our |
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76 // size be correct, consistent and henceforth stable, at this stage. |
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77 assert(c->is_parsable(), "Else size() below is unreliable"); |
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78 DEBUG_ONLY(int sz = c->size();) |
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79 |
| 0 | 80 // initialize tag array |
| 81 // Note: cannot introduce constant pool handle before since it is not | |
| 82 // completely initialized (no class) -> would cause assertion failure | |
| 83 constantPoolHandle pool (THREAD, c); | |
| 84 typeArrayOop t_oop = oopFactory::new_permanent_byteArray(length, CHECK_NULL); | |
| 85 typeArrayHandle tags (THREAD, t_oop); | |
| 86 for (int index = 0; index < length; index++) { | |
| 87 tags()->byte_at_put(index, JVM_CONSTANT_Invalid); | |
| 88 } | |
| 89 pool->set_tags(tags()); | |
| 90 | |
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91 // Check that our size was stable at its old value. |
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92 assert(sz == c->size(), "size() changed"); |
| 0 | 93 return pool(); |
| 94 } | |
| 95 | |
| 96 klassOop constantPoolKlass::create_klass(TRAPS) { | |
| 97 constantPoolKlass o; | |
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98 KlassHandle h_this_klass(THREAD, Universe::klassKlassObj()); |
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99 KlassHandle k = base_create_klass(h_this_klass, header_size(), o.vtbl_value(), CHECK_NULL); |
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100 // Make sure size calculation is right |
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101 assert(k()->size() == align_object_size(header_size()), "wrong size for object"); |
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102 java_lang_Class::create_mirror(k, CHECK_NULL); // Allocate mirror |
| 0 | 103 return k(); |
| 104 } | |
| 105 | |
| 106 int constantPoolKlass::oop_size(oop obj) const { | |
| 107 assert(obj->is_constantPool(), "must be constantPool"); | |
| 108 return constantPoolOop(obj)->object_size(); | |
| 109 } | |
| 110 | |
| 111 | |
| 112 void constantPoolKlass::oop_follow_contents(oop obj) { | |
| 113 assert (obj->is_constantPool(), "obj must be constant pool"); | |
| 114 constantPoolOop cp = (constantPoolOop) obj; | |
| 115 // Performance tweak: We skip iterating over the klass pointer since we | |
| 116 // know that Universe::constantPoolKlassObj never moves. | |
| 117 | |
| 118 // If the tags array is null we are in the middle of allocating this constant pool | |
| 119 if (cp->tags() != NULL) { | |
| 120 // gc of constant pool contents | |
| 121 oop* base = (oop*)cp->base(); | |
| 122 for (int i = 0; i < cp->length(); i++) { | |
| 123 if (cp->is_pointer_entry(i)) { | |
| 124 if (*base != NULL) MarkSweep::mark_and_push(base); | |
| 125 } | |
| 126 base++; | |
| 127 } | |
| 128 // gc of constant pool instance variables | |
| 129 MarkSweep::mark_and_push(cp->tags_addr()); | |
| 130 MarkSweep::mark_and_push(cp->cache_addr()); | |
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131 MarkSweep::mark_and_push(cp->operands_addr()); |
| 0 | 132 MarkSweep::mark_and_push(cp->pool_holder_addr()); |
| 133 } | |
| 134 } | |
| 135 | |
| 136 #ifndef SERIALGC | |
| 137 void constantPoolKlass::oop_follow_contents(ParCompactionManager* cm, | |
| 138 oop obj) { | |
| 139 assert (obj->is_constantPool(), "obj must be constant pool"); | |
| 140 constantPoolOop cp = (constantPoolOop) obj; | |
| 141 // Performance tweak: We skip iterating over the klass pointer since we | |
| 142 // know that Universe::constantPoolKlassObj never moves. | |
| 143 | |
| 144 // If the tags array is null we are in the middle of allocating this constant | |
| 145 // pool. | |
| 146 if (cp->tags() != NULL) { | |
| 147 // gc of constant pool contents | |
| 148 oop* base = (oop*)cp->base(); | |
| 149 for (int i = 0; i < cp->length(); i++) { | |
| 150 if (cp->is_pointer_entry(i)) { | |
| 151 if (*base != NULL) PSParallelCompact::mark_and_push(cm, base); | |
| 152 } | |
| 153 base++; | |
| 154 } | |
| 155 // gc of constant pool instance variables | |
| 156 PSParallelCompact::mark_and_push(cm, cp->tags_addr()); | |
| 157 PSParallelCompact::mark_and_push(cm, cp->cache_addr()); | |
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158 PSParallelCompact::mark_and_push(cm, cp->operands_addr()); |
| 0 | 159 PSParallelCompact::mark_and_push(cm, cp->pool_holder_addr()); |
| 160 } | |
| 161 } | |
| 162 #endif // SERIALGC | |
| 163 | |
| 164 | |
| 165 int constantPoolKlass::oop_adjust_pointers(oop obj) { | |
| 166 assert (obj->is_constantPool(), "obj must be constant pool"); | |
| 167 constantPoolOop cp = (constantPoolOop) obj; | |
| 168 // Get size before changing pointers. | |
| 169 // Don't call size() or oop_size() since that is a virtual call. | |
| 170 int size = cp->object_size(); | |
| 171 // Performance tweak: We skip iterating over the klass pointer since we | |
| 172 // know that Universe::constantPoolKlassObj never moves. | |
| 173 | |
| 174 // If the tags array is null we are in the middle of allocating this constant | |
| 175 // pool. | |
| 176 if (cp->tags() != NULL) { | |
| 177 oop* base = (oop*)cp->base(); | |
| 178 for (int i = 0; i< cp->length(); i++) { | |
| 179 if (cp->is_pointer_entry(i)) { | |
| 180 MarkSweep::adjust_pointer(base); | |
| 181 } | |
| 182 base++; | |
| 183 } | |
| 184 } | |
| 185 MarkSweep::adjust_pointer(cp->tags_addr()); | |
| 186 MarkSweep::adjust_pointer(cp->cache_addr()); | |
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187 MarkSweep::adjust_pointer(cp->operands_addr()); |
| 0 | 188 MarkSweep::adjust_pointer(cp->pool_holder_addr()); |
| 189 return size; | |
| 190 } | |
| 191 | |
| 192 | |
| 193 int constantPoolKlass::oop_oop_iterate(oop obj, OopClosure* blk) { | |
| 194 assert (obj->is_constantPool(), "obj must be constant pool"); | |
| 195 // Performance tweak: We skip iterating over the klass pointer since we | |
| 196 // know that Universe::constantPoolKlassObj never moves. | |
| 197 constantPoolOop cp = (constantPoolOop) obj; | |
| 198 // Get size before changing pointers. | |
| 199 // Don't call size() or oop_size() since that is a virtual call. | |
| 200 int size = cp->object_size(); | |
| 201 | |
| 202 // If the tags array is null we are in the middle of allocating this constant | |
| 203 // pool. | |
| 204 if (cp->tags() != NULL) { | |
| 205 oop* base = (oop*)cp->base(); | |
| 206 for (int i = 0; i < cp->length(); i++) { | |
| 207 if (cp->is_pointer_entry(i)) { | |
| 208 blk->do_oop(base); | |
| 209 } | |
| 210 base++; | |
| 211 } | |
| 212 } | |
| 213 blk->do_oop(cp->tags_addr()); | |
| 214 blk->do_oop(cp->cache_addr()); | |
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215 blk->do_oop(cp->operands_addr()); |
| 0 | 216 blk->do_oop(cp->pool_holder_addr()); |
| 217 return size; | |
| 218 } | |
| 219 | |
| 220 | |
| 221 int constantPoolKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { | |
| 222 assert (obj->is_constantPool(), "obj must be constant pool"); | |
| 223 // Performance tweak: We skip iterating over the klass pointer since we | |
| 224 // know that Universe::constantPoolKlassObj never moves. | |
| 225 constantPoolOop cp = (constantPoolOop) obj; | |
| 226 // Get size before changing pointers. | |
| 227 // Don't call size() or oop_size() since that is a virtual call. | |
| 228 int size = cp->object_size(); | |
| 229 | |
| 230 // If the tags array is null we are in the middle of allocating this constant | |
| 231 // pool. | |
| 232 if (cp->tags() != NULL) { | |
| 233 oop* base = (oop*)cp->base(); | |
| 234 for (int i = 0; i < cp->length(); i++) { | |
| 235 if (mr.contains(base)) { | |
| 236 if (cp->is_pointer_entry(i)) { | |
| 237 blk->do_oop(base); | |
| 238 } | |
| 239 } | |
| 240 base++; | |
| 241 } | |
| 242 } | |
| 243 oop* addr; | |
| 244 addr = cp->tags_addr(); | |
| 245 blk->do_oop(addr); | |
| 246 addr = cp->cache_addr(); | |
| 247 blk->do_oop(addr); | |
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248 addr = cp->operands_addr(); |
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249 blk->do_oop(addr); |
| 0 | 250 addr = cp->pool_holder_addr(); |
| 251 blk->do_oop(addr); | |
| 252 return size; | |
| 253 } | |
| 254 | |
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255 bool constantPoolKlass::oop_is_conc_safe(oop obj) const { |
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256 assert(obj->is_constantPool(), "must be constantPool"); |
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257 return constantPoolOop(obj)->is_conc_safe(); |
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258 } |
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259 |
| 0 | 260 #ifndef SERIALGC |
| 261 int constantPoolKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { | |
| 262 assert (obj->is_constantPool(), "obj must be constant pool"); | |
| 263 constantPoolOop cp = (constantPoolOop) obj; | |
| 264 | |
| 265 // If the tags array is null we are in the middle of allocating this constant | |
| 266 // pool. | |
| 267 if (cp->tags() != NULL) { | |
| 268 oop* base = (oop*)cp->base(); | |
| 269 for (int i = 0; i < cp->length(); ++i, ++base) { | |
| 270 if (cp->is_pointer_entry(i)) { | |
| 271 PSParallelCompact::adjust_pointer(base); | |
| 272 } | |
| 273 } | |
| 274 } | |
| 275 PSParallelCompact::adjust_pointer(cp->tags_addr()); | |
| 276 PSParallelCompact::adjust_pointer(cp->cache_addr()); | |
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277 PSParallelCompact::adjust_pointer(cp->operands_addr()); |
| 0 | 278 PSParallelCompact::adjust_pointer(cp->pool_holder_addr()); |
| 279 return cp->object_size(); | |
| 280 } | |
| 281 | |
| 282 int | |
| 283 constantPoolKlass::oop_update_pointers(ParCompactionManager* cm, oop obj, | |
| 284 HeapWord* beg_addr, HeapWord* end_addr) { | |
| 285 assert (obj->is_constantPool(), "obj must be constant pool"); | |
| 286 constantPoolOop cp = (constantPoolOop) obj; | |
| 287 | |
| 288 // If the tags array is null we are in the middle of allocating this constant | |
| 289 // pool. | |
| 290 if (cp->tags() != NULL) { | |
| 291 oop* base = (oop*)cp->base(); | |
| 292 oop* const beg_oop = MAX2((oop*)beg_addr, base); | |
| 293 oop* const end_oop = MIN2((oop*)end_addr, base + cp->length()); | |
| 294 const size_t beg_idx = pointer_delta(beg_oop, base, sizeof(oop*)); | |
| 295 const size_t end_idx = pointer_delta(end_oop, base, sizeof(oop*)); | |
| 296 for (size_t cur_idx = beg_idx; cur_idx < end_idx; ++cur_idx, ++base) { | |
| 297 if (cp->is_pointer_entry(int(cur_idx))) { | |
| 298 PSParallelCompact::adjust_pointer(base); | |
| 299 } | |
| 300 } | |
| 301 } | |
| 302 | |
| 303 oop* p; | |
| 304 p = cp->tags_addr(); | |
| 305 PSParallelCompact::adjust_pointer(p, beg_addr, end_addr); | |
| 306 p = cp->cache_addr(); | |
| 307 PSParallelCompact::adjust_pointer(p, beg_addr, end_addr); | |
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308 p = cp->operands_addr(); |
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309 PSParallelCompact::adjust_pointer(p, beg_addr, end_addr); |
| 0 | 310 p = cp->pool_holder_addr(); |
| 311 PSParallelCompact::adjust_pointer(p, beg_addr, end_addr); | |
| 312 | |
| 313 return cp->object_size(); | |
| 314 } | |
| 315 | |
| 316 void constantPoolKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { | |
| 317 assert(obj->is_constantPool(), "should be constant pool"); | |
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318 constantPoolOop cp = (constantPoolOop) obj; |
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319 if (AnonymousClasses && cp->has_pseudo_string() && cp->tags() != NULL) { |
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320 oop* base = (oop*)cp->base(); |
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321 for (int i = 0; i < cp->length(); ++i, ++base) { |
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322 if (cp->tag_at(i).is_string()) { |
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323 if (PSScavenge::should_scavenge(base)) { |
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324 pm->claim_or_forward_depth(base); |
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325 } |
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326 } |
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327 } |
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328 } |
| 0 | 329 } |
| 330 #endif // SERIALGC | |
| 331 | |
| 332 // Printing | |
| 333 | |
| 334 void constantPoolKlass::oop_print_on(oop obj, outputStream* st) { | |
| 335 EXCEPTION_MARK; | |
| 336 oop anObj; | |
| 337 assert(obj->is_constantPool(), "must be constantPool"); | |
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338 Klass::oop_print_on(obj, st); |
| 0 | 339 constantPoolOop cp = constantPoolOop(obj); |
|
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340 if (cp->flags() != 0) { |
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341 st->print(" - flags: 0x%x", cp->flags()); |
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342 if (cp->has_pseudo_string()) st->print(" has_pseudo_string"); |
|
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343 if (cp->has_invokedynamic()) st->print(" has_invokedynamic"); |
|
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344 st->cr(); |
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345 } |
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346 st->print_cr(" - cache: " INTPTR_FORMAT, cp->cache()); |
| 0 | 347 |
| 348 for (int index = 1; index < cp->length(); index++) { // Index 0 is unused | |
| 349 st->print(" - %3d : ", index); | |
| 350 cp->tag_at(index).print_on(st); | |
| 351 st->print(" : "); | |
| 352 switch (cp->tag_at(index).value()) { | |
| 353 case JVM_CONSTANT_Class : | |
| 354 { anObj = cp->klass_at(index, CATCH); | |
| 355 anObj->print_value_on(st); | |
| 356 st->print(" {0x%lx}", (address)anObj); | |
| 357 } | |
| 358 break; | |
| 359 case JVM_CONSTANT_Fieldref : | |
| 360 case JVM_CONSTANT_Methodref : | |
| 361 case JVM_CONSTANT_InterfaceMethodref : | |
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362 st->print("klass_index=%d", cp->uncached_klass_ref_index_at(index)); |
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363 st->print(" name_and_type_index=%d", cp->uncached_name_and_type_ref_index_at(index)); |
| 0 | 364 break; |
| 365 case JVM_CONSTANT_UnresolvedString : | |
| 366 case JVM_CONSTANT_String : | |
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367 if (cp->is_pseudo_string_at(index)) { |
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368 anObj = cp->pseudo_string_at(index); |
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369 } else { |
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370 anObj = cp->string_at(index, CATCH); |
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371 } |
| 0 | 372 anObj->print_value_on(st); |
| 373 st->print(" {0x%lx}", (address)anObj); | |
| 374 break; | |
| 375 case JVM_CONSTANT_Integer : | |
| 376 st->print("%d", cp->int_at(index)); | |
| 377 break; | |
| 378 case JVM_CONSTANT_Float : | |
| 379 st->print("%f", cp->float_at(index)); | |
| 380 break; | |
| 381 case JVM_CONSTANT_Long : | |
| 382 st->print_jlong(cp->long_at(index)); | |
| 383 index++; // Skip entry following eigth-byte constant | |
| 384 break; | |
| 385 case JVM_CONSTANT_Double : | |
| 386 st->print("%lf", cp->double_at(index)); | |
| 387 index++; // Skip entry following eigth-byte constant | |
| 388 break; | |
| 389 case JVM_CONSTANT_NameAndType : | |
| 390 st->print("name_index=%d", cp->name_ref_index_at(index)); | |
| 391 st->print(" signature_index=%d", cp->signature_ref_index_at(index)); | |
| 392 break; | |
| 393 case JVM_CONSTANT_Utf8 : | |
| 394 cp->symbol_at(index)->print_value_on(st); | |
| 395 break; | |
| 396 case JVM_CONSTANT_UnresolvedClass : // fall-through | |
| 397 case JVM_CONSTANT_UnresolvedClassInError: { | |
| 398 // unresolved_klass_at requires lock or safe world. | |
|
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399 CPSlot entry = cp->slot_at(index); |
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400 if (entry.is_oop()) { |
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401 entry.get_oop()->print_value_on(st); |
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402 } else { |
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403 entry.get_symbol()->print_value_on(st); |
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404 } |
| 0 | 405 } |
| 406 break; | |
| 1602 | 407 case JVM_CONSTANT_MethodHandle : |
| 408 st->print("ref_kind=%d", cp->method_handle_ref_kind_at(index)); | |
| 409 st->print(" ref_index=%d", cp->method_handle_index_at(index)); | |
| 410 break; | |
| 411 case JVM_CONSTANT_MethodType : | |
| 412 st->print("signature_index=%d", cp->method_type_index_at(index)); | |
| 413 break; | |
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414 case JVM_CONSTANT_InvokeDynamicTrans : |
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415 case JVM_CONSTANT_InvokeDynamic : |
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416 { |
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417 st->print("bootstrap_method_index=%d", cp->invoke_dynamic_bootstrap_method_ref_index_at(index)); |
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418 st->print(" name_and_type_index=%d", cp->invoke_dynamic_name_and_type_ref_index_at(index)); |
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419 int argc = cp->invoke_dynamic_argument_count_at(index); |
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420 if (argc > 0) { |
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421 for (int arg_i = 0; arg_i < argc; arg_i++) { |
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422 int arg = cp->invoke_dynamic_argument_index_at(index, arg_i); |
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423 st->print((arg_i == 0 ? " arguments={%d" : ", %d"), arg); |
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424 } |
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425 st->print("}"); |
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426 } |
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427 } |
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428 break; |
| 0 | 429 default: |
| 430 ShouldNotReachHere(); | |
| 431 break; | |
| 432 } | |
| 433 st->cr(); | |
| 434 } | |
| 435 st->cr(); | |
| 436 } | |
| 437 | |
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438 void constantPoolKlass::oop_print_value_on(oop obj, outputStream* st) { |
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439 assert(obj->is_constantPool(), "must be constantPool"); |
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440 constantPoolOop cp = constantPoolOop(obj); |
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441 st->print("constant pool [%d]", cp->length()); |
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442 if (cp->has_pseudo_string()) st->print("/pseudo_string"); |
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443 if (cp->has_invokedynamic()) st->print("/invokedynamic"); |
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444 if (cp->operands() != NULL) st->print("/operands[%d]", cp->operands()->length()); |
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445 cp->print_address_on(st); |
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446 st->print(" for "); |
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447 cp->pool_holder()->print_value_on(st); |
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448 if (cp->cache() != NULL) { |
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449 st->print(" cache=" PTR_FORMAT, cp->cache()); |
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450 } |
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451 } |
| 0 | 452 |
| 453 const char* constantPoolKlass::internal_name() const { | |
| 454 return "{constant pool}"; | |
| 455 } | |
| 456 | |
| 457 // Verification | |
| 458 | |
| 459 void constantPoolKlass::oop_verify_on(oop obj, outputStream* st) { | |
| 460 Klass::oop_verify_on(obj, st); | |
| 461 guarantee(obj->is_constantPool(), "object must be constant pool"); | |
| 462 constantPoolOop cp = constantPoolOop(obj); | |
| 463 guarantee(cp->is_perm(), "should be in permspace"); | |
| 464 if (!cp->partially_loaded()) { | |
| 465 for (int i = 0; i< cp->length(); i++) { | |
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466 CPSlot entry = cp->slot_at(i); |
| 0 | 467 if (cp->tag_at(i).is_klass()) { |
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468 if (entry.is_oop()) { |
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469 guarantee(entry.get_oop()->is_perm(), "should be in permspace"); |
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470 guarantee(entry.get_oop()->is_klass(), "should be klass"); |
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471 } |
| 0 | 472 } |
| 473 if (cp->tag_at(i).is_unresolved_klass()) { | |
|
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474 if (entry.is_oop()) { |
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475 guarantee(entry.get_oop()->is_perm(), "should be in permspace"); |
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476 guarantee(entry.get_oop()->is_klass(), "should be klass"); |
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477 } |
| 0 | 478 } |
| 479 if (cp->tag_at(i).is_symbol()) { | |
|
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480 guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count"); |
| 0 | 481 } |
| 482 if (cp->tag_at(i).is_unresolved_string()) { | |
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483 if (entry.is_oop()) { |
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484 guarantee(entry.get_oop()->is_perm(), "should be in permspace"); |
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485 guarantee(entry.get_oop()->is_instance(), "should be instance"); |
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486 } |
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487 else { |
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488 guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count"); |
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489 } |
| 0 | 490 } |
| 491 if (cp->tag_at(i).is_string()) { | |
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492 if (!cp->has_pseudo_string()) { |
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493 if (entry.is_oop()) { |
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494 guarantee(entry.get_oop()->is_perm(), "should be in permspace"); |
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495 guarantee(entry.get_oop()->is_instance(), "should be instance"); |
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496 } |
|
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497 } else { |
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498 // can be non-perm, can be non-instance (array) |
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499 } |
| 0 | 500 } |
| 1602 | 501 // FIXME: verify JSR 292 tags JVM_CONSTANT_MethodHandle, etc. |
| 0 | 502 } |
| 503 guarantee(cp->tags()->is_perm(), "should be in permspace"); | |
| 504 guarantee(cp->tags()->is_typeArray(), "should be type array"); | |
| 505 if (cp->cache() != NULL) { | |
| 506 // Note: cache() can be NULL before a class is completely setup or | |
| 507 // in temporary constant pools used during constant pool merging | |
| 508 guarantee(cp->cache()->is_perm(), "should be in permspace"); | |
| 509 guarantee(cp->cache()->is_constantPoolCache(), "should be constant pool cache"); | |
| 510 } | |
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511 if (cp->operands() != NULL) { |
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512 guarantee(cp->operands()->is_perm(), "should be in permspace"); |
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513 guarantee(cp->operands()->is_typeArray(), "should be type array"); |
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514 } |
| 0 | 515 if (cp->pool_holder() != NULL) { |
| 516 // Note: pool_holder() can be NULL in temporary constant pools | |
| 517 // used during constant pool merging | |
| 518 guarantee(cp->pool_holder()->is_perm(), "should be in permspace"); | |
| 519 guarantee(cp->pool_holder()->is_klass(), "should be klass"); | |
| 520 } | |
| 521 } | |
| 522 } | |
| 523 | |
| 524 bool constantPoolKlass::oop_partially_loaded(oop obj) const { | |
| 525 assert(obj->is_constantPool(), "object must be constant pool"); | |
| 526 constantPoolOop cp = constantPoolOop(obj); | |
| 527 return cp->tags() == NULL || cp->pool_holder() == (klassOop) cp; // Check whether pool holder points to self | |
| 528 } | |
| 529 | |
| 530 | |
| 531 void constantPoolKlass::oop_set_partially_loaded(oop obj) { | |
| 532 assert(obj->is_constantPool(), "object must be constant pool"); | |
| 533 constantPoolOop cp = constantPoolOop(obj); | |
| 534 assert(cp->pool_holder() == NULL, "just checking"); | |
| 535 cp->set_pool_holder((klassOop) cp); // Temporarily set pool holder to point to self | |
| 536 } | |
| 537 | |
| 538 #ifndef PRODUCT | |
| 539 // CompileTheWorld support. Preload all classes loaded references in the passed in constantpool | |
| 540 void constantPoolKlass::preload_and_initialize_all_classes(oop obj, TRAPS) { | |
| 541 guarantee(obj->is_constantPool(), "object must be constant pool"); | |
| 542 constantPoolHandle cp(THREAD, (constantPoolOop)obj); | |
| 543 guarantee(!cp->partially_loaded(), "must be fully loaded"); | |
| 544 | |
| 545 for (int i = 0; i< cp->length(); i++) { | |
| 546 if (cp->tag_at(i).is_unresolved_klass()) { | |
| 547 // This will force loading of the class | |
| 548 klassOop klass = cp->klass_at(i, CHECK); | |
| 549 if (klass->is_instance()) { | |
| 550 // Force initialization of class | |
| 551 instanceKlass::cast(klass)->initialize(CHECK); | |
| 552 } | |
| 553 } | |
| 554 } | |
| 555 } | |
| 556 | |
| 557 #endif |