Mercurial > hg > graal-jvmci-8
annotate src/share/vm/oops/constantPoolKlass.cpp @ 431:a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
Summary: low-level privileged sun.misc.Unsafe.defineAnonymousClass
Reviewed-by: kvn
| author | jrose |
|---|---|
| date | Wed, 12 Nov 2008 22:33:26 -0800 |
| parents | d1605aabd0a1 |
| children | 0af8b0718fc9 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 196 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. 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 * | |
| 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 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_constantPoolKlass.cpp.incl" | |
| 27 | |
| 28 constantPoolOop constantPoolKlass::allocate(int length, TRAPS) { | |
| 29 int size = constantPoolOopDesc::object_size(length); | |
| 30 KlassHandle klass (THREAD, as_klassOop()); | |
| 31 constantPoolOop c = | |
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32 (constantPoolOop)CollectedHeap::permanent_obj_allocate(klass, size, CHECK_NULL); |
| 0 | 33 |
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34 c->set_length(length); |
| 0 | 35 c->set_tags(NULL); |
| 36 c->set_cache(NULL); | |
| 37 c->set_pool_holder(NULL); | |
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38 c->set_flags(0); |
| 0 | 39 // only set to non-zero if constant pool is merged by RedefineClasses |
| 40 c->set_orig_length(0); | |
| 41 // all fields are initialized; needed for GC | |
| 42 | |
| 43 // initialize tag array | |
| 44 // Note: cannot introduce constant pool handle before since it is not | |
| 45 // completely initialized (no class) -> would cause assertion failure | |
| 46 constantPoolHandle pool (THREAD, c); | |
| 47 typeArrayOop t_oop = oopFactory::new_permanent_byteArray(length, CHECK_NULL); | |
| 48 typeArrayHandle tags (THREAD, t_oop); | |
| 49 for (int index = 0; index < length; index++) { | |
| 50 tags()->byte_at_put(index, JVM_CONSTANT_Invalid); | |
| 51 } | |
| 52 pool->set_tags(tags()); | |
| 53 | |
| 54 return pool(); | |
| 55 } | |
| 56 | |
| 57 klassOop constantPoolKlass::create_klass(TRAPS) { | |
| 58 constantPoolKlass o; | |
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59 KlassHandle h_this_klass(THREAD, Universe::klassKlassObj()); |
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60 KlassHandle k = base_create_klass(h_this_klass, header_size(), o.vtbl_value(), CHECK_NULL); |
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61 // Make sure size calculation is right |
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62 assert(k()->size() == align_object_size(header_size()), "wrong size for object"); |
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63 java_lang_Class::create_mirror(k, CHECK_NULL); // Allocate mirror |
| 0 | 64 return k(); |
| 65 } | |
| 66 | |
| 67 int constantPoolKlass::oop_size(oop obj) const { | |
| 68 assert(obj->is_constantPool(), "must be constantPool"); | |
| 69 return constantPoolOop(obj)->object_size(); | |
| 70 } | |
| 71 | |
| 72 | |
| 73 void constantPoolKlass::oop_follow_contents(oop obj) { | |
| 74 assert (obj->is_constantPool(), "obj must be constant pool"); | |
| 75 constantPoolOop cp = (constantPoolOop) obj; | |
| 76 // Performance tweak: We skip iterating over the klass pointer since we | |
| 77 // know that Universe::constantPoolKlassObj never moves. | |
| 78 | |
| 79 // If the tags array is null we are in the middle of allocating this constant pool | |
| 80 if (cp->tags() != NULL) { | |
| 81 // gc of constant pool contents | |
| 82 oop* base = (oop*)cp->base(); | |
| 83 for (int i = 0; i < cp->length(); i++) { | |
| 84 if (cp->is_pointer_entry(i)) { | |
| 85 if (*base != NULL) MarkSweep::mark_and_push(base); | |
| 86 } | |
| 87 base++; | |
| 88 } | |
| 89 // gc of constant pool instance variables | |
| 90 MarkSweep::mark_and_push(cp->tags_addr()); | |
| 91 MarkSweep::mark_and_push(cp->cache_addr()); | |
| 92 MarkSweep::mark_and_push(cp->pool_holder_addr()); | |
| 93 } | |
| 94 } | |
| 95 | |
| 96 #ifndef SERIALGC | |
| 97 void constantPoolKlass::oop_follow_contents(ParCompactionManager* cm, | |
| 98 oop obj) { | |
| 99 assert (obj->is_constantPool(), "obj must be constant pool"); | |
| 100 constantPoolOop cp = (constantPoolOop) obj; | |
| 101 // Performance tweak: We skip iterating over the klass pointer since we | |
| 102 // know that Universe::constantPoolKlassObj never moves. | |
| 103 | |
| 104 // If the tags array is null we are in the middle of allocating this constant | |
| 105 // pool. | |
| 106 if (cp->tags() != NULL) { | |
| 107 // gc of constant pool contents | |
| 108 oop* base = (oop*)cp->base(); | |
| 109 for (int i = 0; i < cp->length(); i++) { | |
| 110 if (cp->is_pointer_entry(i)) { | |
| 111 if (*base != NULL) PSParallelCompact::mark_and_push(cm, base); | |
| 112 } | |
| 113 base++; | |
| 114 } | |
| 115 // gc of constant pool instance variables | |
| 116 PSParallelCompact::mark_and_push(cm, cp->tags_addr()); | |
| 117 PSParallelCompact::mark_and_push(cm, cp->cache_addr()); | |
| 118 PSParallelCompact::mark_and_push(cm, cp->pool_holder_addr()); | |
| 119 } | |
| 120 } | |
| 121 #endif // SERIALGC | |
| 122 | |
| 123 | |
| 124 int constantPoolKlass::oop_adjust_pointers(oop obj) { | |
| 125 assert (obj->is_constantPool(), "obj must be constant pool"); | |
| 126 constantPoolOop cp = (constantPoolOop) obj; | |
| 127 // Get size before changing pointers. | |
| 128 // Don't call size() or oop_size() since that is a virtual call. | |
| 129 int size = cp->object_size(); | |
| 130 // Performance tweak: We skip iterating over the klass pointer since we | |
| 131 // know that Universe::constantPoolKlassObj never moves. | |
| 132 | |
| 133 // If the tags array is null we are in the middle of allocating this constant | |
| 134 // pool. | |
| 135 if (cp->tags() != NULL) { | |
| 136 oop* base = (oop*)cp->base(); | |
| 137 for (int i = 0; i< cp->length(); i++) { | |
| 138 if (cp->is_pointer_entry(i)) { | |
| 139 MarkSweep::adjust_pointer(base); | |
| 140 } | |
| 141 base++; | |
| 142 } | |
| 143 } | |
| 144 MarkSweep::adjust_pointer(cp->tags_addr()); | |
| 145 MarkSweep::adjust_pointer(cp->cache_addr()); | |
| 146 MarkSweep::adjust_pointer(cp->pool_holder_addr()); | |
| 147 return size; | |
| 148 } | |
| 149 | |
| 150 | |
| 151 int constantPoolKlass::oop_oop_iterate(oop obj, OopClosure* blk) { | |
| 152 assert (obj->is_constantPool(), "obj must be constant pool"); | |
| 153 // Performance tweak: We skip iterating over the klass pointer since we | |
| 154 // know that Universe::constantPoolKlassObj never moves. | |
| 155 constantPoolOop cp = (constantPoolOop) obj; | |
| 156 // Get size before changing pointers. | |
| 157 // Don't call size() or oop_size() since that is a virtual call. | |
| 158 int size = cp->object_size(); | |
| 159 | |
| 160 // If the tags array is null we are in the middle of allocating this constant | |
| 161 // pool. | |
| 162 if (cp->tags() != NULL) { | |
| 163 oop* base = (oop*)cp->base(); | |
| 164 for (int i = 0; i < cp->length(); i++) { | |
| 165 if (cp->is_pointer_entry(i)) { | |
| 166 blk->do_oop(base); | |
| 167 } | |
| 168 base++; | |
| 169 } | |
| 170 } | |
| 171 blk->do_oop(cp->tags_addr()); | |
| 172 blk->do_oop(cp->cache_addr()); | |
| 173 blk->do_oop(cp->pool_holder_addr()); | |
| 174 return size; | |
| 175 } | |
| 176 | |
| 177 | |
| 178 int constantPoolKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { | |
| 179 assert (obj->is_constantPool(), "obj must be constant pool"); | |
| 180 // Performance tweak: We skip iterating over the klass pointer since we | |
| 181 // know that Universe::constantPoolKlassObj never moves. | |
| 182 constantPoolOop cp = (constantPoolOop) obj; | |
| 183 // Get size before changing pointers. | |
| 184 // Don't call size() or oop_size() since that is a virtual call. | |
| 185 int size = cp->object_size(); | |
| 186 | |
| 187 // If the tags array is null we are in the middle of allocating this constant | |
| 188 // pool. | |
| 189 if (cp->tags() != NULL) { | |
| 190 oop* base = (oop*)cp->base(); | |
| 191 for (int i = 0; i < cp->length(); i++) { | |
| 192 if (mr.contains(base)) { | |
| 193 if (cp->is_pointer_entry(i)) { | |
| 194 blk->do_oop(base); | |
| 195 } | |
| 196 } | |
| 197 base++; | |
| 198 } | |
| 199 } | |
| 200 oop* addr; | |
| 201 addr = cp->tags_addr(); | |
| 202 blk->do_oop(addr); | |
| 203 addr = cp->cache_addr(); | |
| 204 blk->do_oop(addr); | |
| 205 addr = cp->pool_holder_addr(); | |
| 206 blk->do_oop(addr); | |
| 207 return size; | |
| 208 } | |
| 209 | |
| 210 #ifndef SERIALGC | |
| 211 int constantPoolKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { | |
| 212 assert (obj->is_constantPool(), "obj must be constant pool"); | |
| 213 constantPoolOop cp = (constantPoolOop) obj; | |
| 214 | |
| 215 // If the tags array is null we are in the middle of allocating this constant | |
| 216 // pool. | |
| 217 if (cp->tags() != NULL) { | |
| 218 oop* base = (oop*)cp->base(); | |
| 219 for (int i = 0; i < cp->length(); ++i, ++base) { | |
| 220 if (cp->is_pointer_entry(i)) { | |
| 221 PSParallelCompact::adjust_pointer(base); | |
| 222 } | |
| 223 } | |
| 224 } | |
| 225 PSParallelCompact::adjust_pointer(cp->tags_addr()); | |
| 226 PSParallelCompact::adjust_pointer(cp->cache_addr()); | |
| 227 PSParallelCompact::adjust_pointer(cp->pool_holder_addr()); | |
| 228 return cp->object_size(); | |
| 229 } | |
| 230 | |
| 231 int | |
| 232 constantPoolKlass::oop_update_pointers(ParCompactionManager* cm, oop obj, | |
| 233 HeapWord* beg_addr, HeapWord* end_addr) { | |
| 234 assert (obj->is_constantPool(), "obj must be constant pool"); | |
| 235 constantPoolOop cp = (constantPoolOop) obj; | |
| 236 | |
| 237 // If the tags array is null we are in the middle of allocating this constant | |
| 238 // pool. | |
| 239 if (cp->tags() != NULL) { | |
| 240 oop* base = (oop*)cp->base(); | |
| 241 oop* const beg_oop = MAX2((oop*)beg_addr, base); | |
| 242 oop* const end_oop = MIN2((oop*)end_addr, base + cp->length()); | |
| 243 const size_t beg_idx = pointer_delta(beg_oop, base, sizeof(oop*)); | |
| 244 const size_t end_idx = pointer_delta(end_oop, base, sizeof(oop*)); | |
| 245 for (size_t cur_idx = beg_idx; cur_idx < end_idx; ++cur_idx, ++base) { | |
| 246 if (cp->is_pointer_entry(int(cur_idx))) { | |
| 247 PSParallelCompact::adjust_pointer(base); | |
| 248 } | |
| 249 } | |
| 250 } | |
| 251 | |
| 252 oop* p; | |
| 253 p = cp->tags_addr(); | |
| 254 PSParallelCompact::adjust_pointer(p, beg_addr, end_addr); | |
| 255 p = cp->cache_addr(); | |
| 256 PSParallelCompact::adjust_pointer(p, beg_addr, end_addr); | |
| 257 p = cp->pool_holder_addr(); | |
| 258 PSParallelCompact::adjust_pointer(p, beg_addr, end_addr); | |
| 259 | |
| 260 return cp->object_size(); | |
| 261 } | |
| 262 | |
| 263 void constantPoolKlass::oop_copy_contents(PSPromotionManager* pm, oop obj) { | |
| 264 assert(obj->is_constantPool(), "should be constant pool"); | |
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265 constantPoolOop cp = (constantPoolOop) obj; |
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266 if (AnonymousClasses && cp->has_pseudo_string() && cp->tags() != NULL) { |
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267 oop* base = (oop*)cp->base(); |
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268 for (int i = 0; i < cp->length(); ++i, ++base) { |
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269 if (cp->tag_at(i).is_string()) { |
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270 if (PSScavenge::should_scavenge(base)) { |
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271 pm->claim_or_forward_breadth(base); |
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272 } |
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273 } |
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274 } |
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275 } |
| 0 | 276 } |
| 277 | |
| 278 void constantPoolKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { | |
| 279 assert(obj->is_constantPool(), "should be constant pool"); | |
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280 constantPoolOop cp = (constantPoolOop) obj; |
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281 if (AnonymousClasses && cp->has_pseudo_string() && cp->tags() != NULL) { |
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282 oop* base = (oop*)cp->base(); |
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283 for (int i = 0; i < cp->length(); ++i, ++base) { |
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284 if (cp->tag_at(i).is_string()) { |
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285 if (PSScavenge::should_scavenge(base)) { |
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286 pm->claim_or_forward_depth(base); |
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287 } |
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288 } |
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289 } |
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290 } |
| 0 | 291 } |
| 292 #endif // SERIALGC | |
| 293 | |
| 294 #ifndef PRODUCT | |
| 295 | |
| 296 // Printing | |
| 297 | |
| 298 void constantPoolKlass::oop_print_on(oop obj, outputStream* st) { | |
| 299 EXCEPTION_MARK; | |
| 300 oop anObj; | |
| 301 assert(obj->is_constantPool(), "must be constantPool"); | |
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302 Klass::oop_print_on(obj, st); |
| 0 | 303 constantPoolOop cp = constantPoolOop(obj); |
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304 if (cp->flags() != 0) { |
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305 st->print(" - flags : 0x%x", cp->flags()); |
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306 if (cp->has_pseudo_string()) st->print(" has_pseudo_string"); |
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307 st->cr(); |
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308 } |
| 0 | 309 |
| 310 // Temp. remove cache so we can do lookups with original indicies. | |
| 311 constantPoolCacheHandle cache (THREAD, cp->cache()); | |
| 312 cp->set_cache(NULL); | |
| 313 | |
| 314 for (int index = 1; index < cp->length(); index++) { // Index 0 is unused | |
| 315 st->print(" - %3d : ", index); | |
| 316 cp->tag_at(index).print_on(st); | |
| 317 st->print(" : "); | |
| 318 switch (cp->tag_at(index).value()) { | |
| 319 case JVM_CONSTANT_Class : | |
| 320 { anObj = cp->klass_at(index, CATCH); | |
| 321 anObj->print_value_on(st); | |
| 322 st->print(" {0x%lx}", (address)anObj); | |
| 323 } | |
| 324 break; | |
| 325 case JVM_CONSTANT_Fieldref : | |
| 326 case JVM_CONSTANT_Methodref : | |
| 327 case JVM_CONSTANT_InterfaceMethodref : | |
| 328 st->print("klass_index=%d", cp->klass_ref_index_at(index)); | |
| 329 st->print(" name_and_type_index=%d", cp->name_and_type_ref_index_at(index)); | |
| 330 break; | |
| 331 case JVM_CONSTANT_UnresolvedString : | |
| 332 case JVM_CONSTANT_String : | |
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333 if (cp->is_pseudo_string_at(index)) { |
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334 anObj = cp->pseudo_string_at(index); |
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335 } else { |
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336 anObj = cp->string_at(index, CATCH); |
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337 } |
| 0 | 338 anObj->print_value_on(st); |
| 339 st->print(" {0x%lx}", (address)anObj); | |
| 340 break; | |
| 341 case JVM_CONSTANT_Integer : | |
| 342 st->print("%d", cp->int_at(index)); | |
| 343 break; | |
| 344 case JVM_CONSTANT_Float : | |
| 345 st->print("%f", cp->float_at(index)); | |
| 346 break; | |
| 347 case JVM_CONSTANT_Long : | |
| 348 st->print_jlong(cp->long_at(index)); | |
| 349 index++; // Skip entry following eigth-byte constant | |
| 350 break; | |
| 351 case JVM_CONSTANT_Double : | |
| 352 st->print("%lf", cp->double_at(index)); | |
| 353 index++; // Skip entry following eigth-byte constant | |
| 354 break; | |
| 355 case JVM_CONSTANT_NameAndType : | |
| 356 st->print("name_index=%d", cp->name_ref_index_at(index)); | |
| 357 st->print(" signature_index=%d", cp->signature_ref_index_at(index)); | |
| 358 break; | |
| 359 case JVM_CONSTANT_Utf8 : | |
| 360 cp->symbol_at(index)->print_value_on(st); | |
| 361 break; | |
| 362 case JVM_CONSTANT_UnresolvedClass : // fall-through | |
| 363 case JVM_CONSTANT_UnresolvedClassInError: { | |
| 364 // unresolved_klass_at requires lock or safe world. | |
| 365 oop entry = *cp->obj_at_addr(index); | |
| 366 entry->print_value_on(st); | |
| 367 } | |
| 368 break; | |
| 369 default: | |
| 370 ShouldNotReachHere(); | |
| 371 break; | |
| 372 } | |
| 373 st->cr(); | |
| 374 } | |
| 375 st->cr(); | |
| 376 | |
| 377 // Restore cache | |
| 378 cp->set_cache(cache()); | |
| 379 } | |
| 380 | |
| 381 | |
| 382 #endif | |
| 383 | |
| 384 const char* constantPoolKlass::internal_name() const { | |
| 385 return "{constant pool}"; | |
| 386 } | |
| 387 | |
| 388 // Verification | |
| 389 | |
| 390 void constantPoolKlass::oop_verify_on(oop obj, outputStream* st) { | |
| 391 Klass::oop_verify_on(obj, st); | |
| 392 guarantee(obj->is_constantPool(), "object must be constant pool"); | |
| 393 constantPoolOop cp = constantPoolOop(obj); | |
| 394 guarantee(cp->is_perm(), "should be in permspace"); | |
| 395 if (!cp->partially_loaded()) { | |
| 396 oop* base = (oop*)cp->base(); | |
| 397 for (int i = 0; i< cp->length(); i++) { | |
| 398 if (cp->tag_at(i).is_klass()) { | |
| 399 guarantee((*base)->is_perm(), "should be in permspace"); | |
| 400 guarantee((*base)->is_klass(), "should be klass"); | |
| 401 } | |
| 402 if (cp->tag_at(i).is_unresolved_klass()) { | |
| 403 guarantee((*base)->is_perm(), "should be in permspace"); | |
| 404 guarantee((*base)->is_symbol() || (*base)->is_klass(), | |
| 405 "should be symbol or klass"); | |
| 406 } | |
| 407 if (cp->tag_at(i).is_symbol()) { | |
| 408 guarantee((*base)->is_perm(), "should be in permspace"); | |
| 409 guarantee((*base)->is_symbol(), "should be symbol"); | |
| 410 } | |
| 411 if (cp->tag_at(i).is_unresolved_string()) { | |
| 412 guarantee((*base)->is_perm(), "should be in permspace"); | |
| 413 guarantee((*base)->is_symbol() || (*base)->is_instance(), | |
| 414 "should be symbol or instance"); | |
| 415 } | |
| 416 if (cp->tag_at(i).is_string()) { | |
|
431
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417 if (!cp->has_pseudo_string()) { |
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418 guarantee((*base)->is_perm(), "should be in permspace"); |
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419 guarantee((*base)->is_instance(), "should be instance"); |
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420 } else { |
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421 // can be non-perm, can be non-instance (array) |
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422 } |
| 0 | 423 } |
| 424 base++; | |
| 425 } | |
| 426 guarantee(cp->tags()->is_perm(), "should be in permspace"); | |
| 427 guarantee(cp->tags()->is_typeArray(), "should be type array"); | |
| 428 if (cp->cache() != NULL) { | |
| 429 // Note: cache() can be NULL before a class is completely setup or | |
| 430 // in temporary constant pools used during constant pool merging | |
| 431 guarantee(cp->cache()->is_perm(), "should be in permspace"); | |
| 432 guarantee(cp->cache()->is_constantPoolCache(), "should be constant pool cache"); | |
| 433 } | |
| 434 if (cp->pool_holder() != NULL) { | |
| 435 // Note: pool_holder() can be NULL in temporary constant pools | |
| 436 // used during constant pool merging | |
| 437 guarantee(cp->pool_holder()->is_perm(), "should be in permspace"); | |
| 438 guarantee(cp->pool_holder()->is_klass(), "should be klass"); | |
| 439 } | |
| 440 } | |
| 441 } | |
| 442 | |
| 443 bool constantPoolKlass::oop_partially_loaded(oop obj) const { | |
| 444 assert(obj->is_constantPool(), "object must be constant pool"); | |
| 445 constantPoolOop cp = constantPoolOop(obj); | |
| 446 return cp->tags() == NULL || cp->pool_holder() == (klassOop) cp; // Check whether pool holder points to self | |
| 447 } | |
| 448 | |
| 449 | |
| 450 void constantPoolKlass::oop_set_partially_loaded(oop obj) { | |
| 451 assert(obj->is_constantPool(), "object must be constant pool"); | |
| 452 constantPoolOop cp = constantPoolOop(obj); | |
| 453 assert(cp->pool_holder() == NULL, "just checking"); | |
| 454 cp->set_pool_holder((klassOop) cp); // Temporarily set pool holder to point to self | |
| 455 } | |
| 456 | |
| 457 #ifndef PRODUCT | |
| 458 // CompileTheWorld support. Preload all classes loaded references in the passed in constantpool | |
| 459 void constantPoolKlass::preload_and_initialize_all_classes(oop obj, TRAPS) { | |
| 460 guarantee(obj->is_constantPool(), "object must be constant pool"); | |
| 461 constantPoolHandle cp(THREAD, (constantPoolOop)obj); | |
| 462 guarantee(!cp->partially_loaded(), "must be fully loaded"); | |
| 463 | |
| 464 for (int i = 0; i< cp->length(); i++) { | |
| 465 if (cp->tag_at(i).is_unresolved_klass()) { | |
| 466 // This will force loading of the class | |
| 467 klassOop klass = cp->klass_at(i, CHECK); | |
| 468 if (klass->is_instance()) { | |
| 469 // Force initialization of class | |
| 470 instanceKlass::cast(klass)->initialize(CHECK); | |
| 471 } | |
| 472 } | |
| 473 } | |
| 474 } | |
| 475 | |
| 476 #endif |