annotate hotspot/src/share/vm/ci/ciInstanceKlass.cpp @ 13728:882756847a04

6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
parents 48fd3da4025c
children 95e66ea71f71
rev   line source
duke@1 1 /*
jiangli@12369 2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
duke@1 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@1 4 *
duke@1 5 * This code is free software; you can redistribute it and/or modify it
duke@1 6 * under the terms of the GNU General Public License version 2 only, as
duke@1 7 * published by the Free Software Foundation.
duke@1 8 *
duke@1 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@1 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@1 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@1 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@1 13 * accompanied this code).
duke@1 14 *
duke@1 15 * You should have received a copy of the GNU General Public License version
duke@1 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@1 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@1 18 *
trims@5547 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@5547 20 * or visit www.oracle.com if you need additional information or have any
trims@5547 21 * questions.
duke@1 22 *
duke@1 23 */
duke@1 24
stefank@7397 25 #include "precompiled.hpp"
stefank@7397 26 #include "ci/ciField.hpp"
stefank@7397 27 #include "ci/ciInstance.hpp"
stefank@7397 28 #include "ci/ciInstanceKlass.hpp"
stefank@7397 29 #include "ci/ciUtilities.hpp"
stefank@7397 30 #include "classfile/systemDictionary.hpp"
stefank@7397 31 #include "memory/allocation.hpp"
stefank@7397 32 #include "memory/allocation.inline.hpp"
stefank@7397 33 #include "oops/oop.inline.hpp"
never@10546 34 #include "oops/fieldStreams.hpp"
stefank@7397 35 #include "runtime/fieldDescriptor.hpp"
duke@1 36
duke@1 37 // ciInstanceKlass
duke@1 38 //
coleenp@13728 39 // This class represents a Klass* in the HotSpot virtual machine
coleenp@13728 40 // whose Klass part in an InstanceKlass.
duke@1 41
duke@1 42 // ------------------------------------------------------------------
duke@1 43 // ciInstanceKlass::ciInstanceKlass
duke@1 44 //
duke@1 45 // Loaded instance klass.
kvn@217 46 ciInstanceKlass::ciInstanceKlass(KlassHandle h_k) :
kvn@217 47 ciKlass(h_k), _non_static_fields(NULL)
kvn@217 48 {
duke@1 49 assert(get_Klass()->oop_is_instance(), "wrong type");
never@8314 50 assert(get_instanceKlass()->is_loaded(), "must be at least loaded");
coleenp@13728 51 InstanceKlass* ik = get_instanceKlass();
duke@1 52
duke@1 53 AccessFlags access_flags = ik->access_flags();
duke@1 54 _flags = ciFlags(access_flags);
duke@1 55 _has_finalizer = access_flags.has_finalizer();
duke@1 56 _has_subklass = ik->subklass() != NULL;
coleenp@11407 57 _init_state = ik->init_state();
duke@1 58 _nonstatic_field_size = ik->nonstatic_field_size();
coleenp@360 59 _has_nonstatic_fields = ik->has_nonstatic_fields();
duke@1 60 _nonstatic_fields = NULL; // initialized lazily by compute_nonstatic_fields:
duke@1 61
jiangli@12369 62 _implementor = NULL; // we will fill these lazily
duke@1 63
duke@1 64 Thread *thread = Thread::current();
duke@1 65 if (ciObjectFactory::is_initialized()) {
duke@1 66 _loader = JNIHandles::make_local(thread, ik->class_loader());
duke@1 67 _protection_domain = JNIHandles::make_local(thread,
duke@1 68 ik->protection_domain());
duke@1 69 _is_shared = false;
duke@1 70 } else {
duke@1 71 Handle h_loader(thread, ik->class_loader());
duke@1 72 Handle h_protection_domain(thread, ik->protection_domain());
duke@1 73 _loader = JNIHandles::make_global(h_loader);
duke@1 74 _protection_domain = JNIHandles::make_global(h_protection_domain);
duke@1 75 _is_shared = true;
duke@1 76 }
duke@1 77
duke@1 78 // Lazy fields get filled in only upon request.
duke@1 79 _super = NULL;
duke@1 80 _java_mirror = NULL;
duke@1 81
duke@1 82 if (is_shared()) {
never@4571 83 if (h_k() != SystemDictionary::Object_klass()) {
duke@1 84 super();
duke@1 85 }
duke@1 86 //compute_nonstatic_fields(); // done outside of constructor
duke@1 87 }
duke@1 88
duke@1 89 _field_cache = NULL;
duke@1 90 }
duke@1 91
duke@1 92 // Version for unloaded classes:
duke@1 93 ciInstanceKlass::ciInstanceKlass(ciSymbol* name,
duke@1 94 jobject loader, jobject protection_domain)
coleenp@13728 95 : ciKlass(name, T_OBJECT)
duke@1 96 {
duke@1 97 assert(name->byte_at(0) != '[', "not an instance klass");
coleenp@13728 98 _init_state = (InstanceKlass::ClassState)0;
duke@1 99 _nonstatic_field_size = -1;
coleenp@360 100 _has_nonstatic_fields = false;
duke@1 101 _nonstatic_fields = NULL;
duke@1 102 _loader = loader;
duke@1 103 _protection_domain = protection_domain;
duke@1 104 _is_shared = false;
duke@1 105 _super = NULL;
duke@1 106 _java_mirror = NULL;
duke@1 107 _field_cache = NULL;
duke@1 108 }
duke@1 109
duke@1 110
duke@1 111
duke@1 112 // ------------------------------------------------------------------
duke@1 113 // ciInstanceKlass::compute_shared_is_initialized
never@5925 114 void ciInstanceKlass::compute_shared_init_state() {
duke@1 115 GUARDED_VM_ENTRY(
coleenp@13728 116 InstanceKlass* ik = get_instanceKlass();
coleenp@11407 117 _init_state = ik->init_state();
duke@1 118 )
duke@1 119 }
duke@1 120
duke@1 121 // ------------------------------------------------------------------
duke@1 122 // ciInstanceKlass::compute_shared_has_subklass
duke@1 123 bool ciInstanceKlass::compute_shared_has_subklass() {
duke@1 124 GUARDED_VM_ENTRY(
coleenp@13728 125 InstanceKlass* ik = get_instanceKlass();
duke@1 126 _has_subklass = ik->subklass() != NULL;
duke@1 127 return _has_subklass;
duke@1 128 )
duke@1 129 }
duke@1 130
duke@1 131 // ------------------------------------------------------------------
duke@1 132 // ciInstanceKlass::loader
duke@1 133 oop ciInstanceKlass::loader() {
duke@1 134 ASSERT_IN_VM;
duke@1 135 return JNIHandles::resolve(_loader);
duke@1 136 }
duke@1 137
duke@1 138 // ------------------------------------------------------------------
duke@1 139 // ciInstanceKlass::loader_handle
duke@1 140 jobject ciInstanceKlass::loader_handle() {
duke@1 141 return _loader;
duke@1 142 }
duke@1 143
duke@1 144 // ------------------------------------------------------------------
duke@1 145 // ciInstanceKlass::protection_domain
duke@1 146 oop ciInstanceKlass::protection_domain() {
duke@1 147 ASSERT_IN_VM;
duke@1 148 return JNIHandles::resolve(_protection_domain);
duke@1 149 }
duke@1 150
duke@1 151 // ------------------------------------------------------------------
duke@1 152 // ciInstanceKlass::protection_domain_handle
duke@1 153 jobject ciInstanceKlass::protection_domain_handle() {
duke@1 154 return _protection_domain;
duke@1 155 }
duke@1 156
duke@1 157 // ------------------------------------------------------------------
duke@1 158 // ciInstanceKlass::field_cache
duke@1 159 //
duke@1 160 // Get the field cache associated with this klass.
duke@1 161 ciConstantPoolCache* ciInstanceKlass::field_cache() {
duke@1 162 if (is_shared()) {
duke@1 163 return NULL;
duke@1 164 }
duke@1 165 if (_field_cache == NULL) {
duke@1 166 assert(!is_java_lang_Object(), "Object has no fields");
duke@1 167 Arena* arena = CURRENT_ENV->arena();
duke@1 168 _field_cache = new (arena) ciConstantPoolCache(arena, 5);
duke@1 169 }
duke@1 170 return _field_cache;
duke@1 171 }
duke@1 172
duke@1 173 // ------------------------------------------------------------------
duke@1 174 // ciInstanceKlass::get_canonical_holder
duke@1 175 //
duke@1 176 ciInstanceKlass* ciInstanceKlass::get_canonical_holder(int offset) {
duke@1 177 #ifdef ASSERT
duke@1 178 if (!(offset >= 0 && offset < layout_helper())) {
duke@1 179 tty->print("*** get_canonical_holder(%d) on ", offset);
duke@1 180 this->print();
duke@1 181 tty->print_cr(" ***");
duke@1 182 };
duke@1 183 assert(offset >= 0 && offset < layout_helper(), "offset must be tame");
duke@1 184 #endif
duke@1 185
coleenp@360 186 if (offset < instanceOopDesc::base_offset_in_bytes()) {
duke@1 187 // All header offsets belong properly to java/lang/Object.
duke@1 188 return CURRENT_ENV->Object_klass();
duke@1 189 }
duke@1 190
duke@1 191 ciInstanceKlass* self = this;
duke@1 192 for (;;) {
duke@1 193 assert(self->is_loaded(), "must be loaded to have size");
duke@1 194 ciInstanceKlass* super = self->super();
coleenp@360 195 if (super == NULL || super->nof_nonstatic_fields() == 0 ||
coleenp@360 196 !super->contains_field_offset(offset)) {
duke@1 197 return self;
duke@1 198 } else {
duke@1 199 self = super; // return super->get_canonical_holder(offset)
duke@1 200 }
duke@1 201 }
duke@1 202 }
duke@1 203
duke@1 204 // ------------------------------------------------------------------
duke@1 205 // ciInstanceKlass::is_java_lang_Object
duke@1 206 //
duke@1 207 // Is this klass java.lang.Object?
coleenp@13728 208 bool ciInstanceKlass::is_java_lang_Object() const {
duke@1 209 return equals(CURRENT_ENV->Object_klass());
duke@1 210 }
duke@1 211
duke@1 212 // ------------------------------------------------------------------
duke@1 213 // ciInstanceKlass::uses_default_loader
duke@1 214 bool ciInstanceKlass::uses_default_loader() {
twisti@4567 215 // Note: We do not need to resolve the handle or enter the VM
twisti@4567 216 // in order to test null-ness.
twisti@4567 217 return _loader == NULL;
twisti@4567 218 }
twisti@4567 219
twisti@4567 220 // ------------------------------------------------------------------
twisti@4567 221 // ciInstanceKlass::is_in_package
twisti@4567 222 //
twisti@4567 223 // Is this klass in the given package?
twisti@4567 224 bool ciInstanceKlass::is_in_package(const char* packagename, int len) {
twisti@4567 225 // To avoid class loader mischief, this test always rejects application classes.
twisti@4567 226 if (!uses_default_loader())
twisti@4567 227 return false;
twisti@4567 228 GUARDED_VM_ENTRY(
twisti@4567 229 return is_in_package_impl(packagename, len);
twisti@4567 230 )
twisti@4567 231 }
twisti@4567 232
twisti@4567 233 bool ciInstanceKlass::is_in_package_impl(const char* packagename, int len) {
twisti@4567 234 ASSERT_IN_VM;
twisti@4567 235
twisti@4567 236 // If packagename contains trailing '/' exclude it from the
twisti@4567 237 // prefix-test since we test for it explicitly.
twisti@4567 238 if (packagename[len - 1] == '/')
twisti@4567 239 len--;
twisti@4567 240
twisti@4567 241 if (!name()->starts_with(packagename, len))
twisti@4567 242 return false;
twisti@4567 243
twisti@4567 244 // Test if the class name is something like "java/lang".
twisti@4567 245 if ((len + 1) > name()->utf8_length())
twisti@4567 246 return false;
twisti@4567 247
twisti@4567 248 // Test for trailing '/'
twisti@4567 249 if ((char) name()->byte_at(len) != '/')
twisti@4567 250 return false;
twisti@4567 251
twisti@4567 252 // Make sure it's not actually in a subpackage:
twisti@4567 253 if (name()->index_of_at(len+1, "/", 1) >= 0)
twisti@4567 254 return false;
twisti@4567 255
twisti@4567 256 return true;
duke@1 257 }
duke@1 258
duke@1 259 // ------------------------------------------------------------------
duke@1 260 // ciInstanceKlass::print_impl
duke@1 261 //
duke@1 262 // Implementation of the print method.
duke@1 263 void ciInstanceKlass::print_impl(outputStream* st) {
duke@1 264 ciKlass::print_impl(st);
duke@1 265 GUARDED_VM_ENTRY(st->print(" loader=0x%x", (address)loader());)
duke@1 266 if (is_loaded()) {
duke@1 267 st->print(" loaded=true initialized=%s finalized=%s subklass=%s size=%d flags=",
duke@1 268 bool_to_str(is_initialized()),
duke@1 269 bool_to_str(has_finalizer()),
duke@1 270 bool_to_str(has_subklass()),
duke@1 271 layout_helper());
duke@1 272
duke@1 273 _flags.print_klass_flags();
duke@1 274
duke@1 275 if (_super) {
duke@1 276 st->print(" super=");
duke@1 277 _super->print_name();
duke@1 278 }
duke@1 279 if (_java_mirror) {
duke@1 280 st->print(" mirror=PRESENT");
duke@1 281 }
duke@1 282 } else {
duke@1 283 st->print(" loaded=false");
duke@1 284 }
duke@1 285 }
duke@1 286
duke@1 287 // ------------------------------------------------------------------
duke@1 288 // ciInstanceKlass::super
duke@1 289 //
duke@1 290 // Get the superklass of this klass.
duke@1 291 ciInstanceKlass* ciInstanceKlass::super() {
duke@1 292 assert(is_loaded(), "must be loaded");
duke@1 293 if (_super == NULL && !is_java_lang_Object()) {
duke@1 294 GUARDED_VM_ENTRY(
coleenp@13728 295 Klass* super_klass = get_instanceKlass()->super();
coleenp@13728 296 _super = CURRENT_ENV->get_instance_klass(super_klass);
duke@1 297 )
duke@1 298 }
duke@1 299 return _super;
duke@1 300 }
duke@1 301
duke@1 302 // ------------------------------------------------------------------
duke@1 303 // ciInstanceKlass::java_mirror
duke@1 304 //
duke@1 305 // Get the instance of java.lang.Class corresponding to this klass.
jrose@5884 306 // Cache it on this->_java_mirror.
duke@1 307 ciInstance* ciInstanceKlass::java_mirror() {
never@8725 308 if (is_shared()) {
never@8725 309 return ciKlass::java_mirror();
never@8725 310 }
duke@1 311 if (_java_mirror == NULL) {
jrose@5884 312 _java_mirror = ciKlass::java_mirror();
duke@1 313 }
duke@1 314 return _java_mirror;
duke@1 315 }
duke@1 316
duke@1 317 // ------------------------------------------------------------------
duke@1 318 // ciInstanceKlass::unique_concrete_subklass
duke@1 319 ciInstanceKlass* ciInstanceKlass::unique_concrete_subklass() {
duke@1 320 if (!is_loaded()) return NULL; // No change if class is not loaded
duke@1 321 if (!is_abstract()) return NULL; // Only applies to abstract classes.
duke@1 322 if (!has_subklass()) return NULL; // Must have at least one subklass.
duke@1 323 VM_ENTRY_MARK;
coleenp@13728 324 InstanceKlass* ik = get_instanceKlass();
duke@1 325 Klass* up = ik->up_cast_abstract();
coleenp@13728 326 assert(up->oop_is_instance(), "must be InstanceKlass");
duke@1 327 if (ik == up) {
duke@1 328 return NULL;
duke@1 329 }
coleenp@13728 330 return CURRENT_THREAD_ENV->get_instance_klass(up);
duke@1 331 }
duke@1 332
duke@1 333 // ------------------------------------------------------------------
duke@1 334 // ciInstanceKlass::has_finalizable_subclass
duke@1 335 bool ciInstanceKlass::has_finalizable_subclass() {
duke@1 336 if (!is_loaded()) return true;
duke@1 337 VM_ENTRY_MARK;
duke@1 338 return Dependencies::find_finalizable_subclass(get_instanceKlass()) != NULL;
duke@1 339 }
duke@1 340
duke@1 341 // ------------------------------------------------------------------
duke@1 342 // ciInstanceKlass::get_field_by_offset
duke@1 343 ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) {
duke@1 344 if (!is_static) {
duke@1 345 for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) {
duke@1 346 ciField* field = _nonstatic_fields->at(i);
duke@1 347 int field_off = field->offset_in_bytes();
duke@1 348 if (field_off == field_offset)
duke@1 349 return field;
duke@1 350 if (field_off > field_offset)
duke@1 351 break;
duke@1 352 // could do binary search or check bins, but probably not worth it
duke@1 353 }
duke@1 354 return NULL;
duke@1 355 }
duke@1 356 VM_ENTRY_MARK;
coleenp@13728 357 InstanceKlass* k = get_instanceKlass();
duke@1 358 fieldDescriptor fd;
duke@1 359 if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
duke@1 360 return NULL;
duke@1 361 }
duke@1 362 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
duke@1 363 return field;
duke@1 364 }
duke@1 365
kvn@217 366 // ------------------------------------------------------------------
never@4450 367 // ciInstanceKlass::get_field_by_name
never@4450 368 ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) {
never@4450 369 VM_ENTRY_MARK;
coleenp@13728 370 InstanceKlass* k = get_instanceKlass();
never@4450 371 fieldDescriptor fd;
coleenp@13728 372 Klass* def = k->find_field(name->get_symbol(), signature->get_symbol(), is_static, &fd);
never@4450 373 if (def == NULL) {
never@4450 374 return NULL;
never@4450 375 }
never@4450 376 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
never@4450 377 return field;
never@4450 378 }
never@4450 379
never@4450 380 // ------------------------------------------------------------------
kvn@217 381 // ciInstanceKlass::non_static_fields.
kvn@217 382
kvn@217 383 class NonStaticFieldFiller: public FieldClosure {
kvn@217 384 GrowableArray<ciField*>* _arr;
kvn@217 385 ciEnv* _curEnv;
kvn@217 386 public:
kvn@217 387 NonStaticFieldFiller(ciEnv* curEnv, GrowableArray<ciField*>* arr) :
kvn@217 388 _curEnv(curEnv), _arr(arr)
kvn@217 389 {}
kvn@217 390 void do_field(fieldDescriptor* fd) {
kvn@217 391 ciField* field = new (_curEnv->arena()) ciField(fd);
kvn@217 392 _arr->append(field);
kvn@217 393 }
kvn@217 394 };
kvn@217 395
kvn@217 396 GrowableArray<ciField*>* ciInstanceKlass::non_static_fields() {
kvn@217 397 if (_non_static_fields == NULL) {
kvn@217 398 VM_ENTRY_MARK;
kvn@217 399 ciEnv* curEnv = ciEnv::current();
coleenp@13728 400 InstanceKlass* ik = get_instanceKlass();
never@10546 401 int max_n_fields = ik->java_fields_count();
kvn@217 402
kvn@6180 403 Arena* arena = curEnv->arena();
kvn@217 404 _non_static_fields =
kvn@6180 405 new (arena) GrowableArray<ciField*>(arena, max_n_fields, 0, NULL);
kvn@217 406 NonStaticFieldFiller filler(curEnv, _non_static_fields);
kvn@217 407 ik->do_nonstatic_fields(&filler);
kvn@217 408 }
kvn@217 409 return _non_static_fields;
kvn@217 410 }
kvn@217 411
duke@1 412 static int sort_field_by_offset(ciField** a, ciField** b) {
duke@1 413 return (*a)->offset_in_bytes() - (*b)->offset_in_bytes();
duke@1 414 // (no worries about 32-bit overflow...)
duke@1 415 }
duke@1 416
duke@1 417 // ------------------------------------------------------------------
duke@1 418 // ciInstanceKlass::compute_nonstatic_fields
duke@1 419 int ciInstanceKlass::compute_nonstatic_fields() {
duke@1 420 assert(is_loaded(), "must be loaded");
duke@1 421
duke@1 422 if (_nonstatic_fields != NULL)
duke@1 423 return _nonstatic_fields->length();
duke@1 424
coleenp@360 425 if (!has_nonstatic_fields()) {
duke@1 426 Arena* arena = CURRENT_ENV->arena();
duke@1 427 _nonstatic_fields = new (arena) GrowableArray<ciField*>(arena, 0, 0, NULL);
duke@1 428 return 0;
duke@1 429 }
duke@1 430 assert(!is_java_lang_Object(), "bootstrap OK");
duke@1 431
coleenp@360 432 // Size in bytes of my fields, including inherited fields.
kvn@591 433 int fsize = nonstatic_field_size() * heapOopSize;
coleenp@360 434
duke@1 435 ciInstanceKlass* super = this->super();
duke@1 436 GrowableArray<ciField*>* super_fields = NULL;
coleenp@360 437 if (super != NULL && super->has_nonstatic_fields()) {
kvn@591 438 int super_fsize = super->nonstatic_field_size() * heapOopSize;
coleenp@360 439 int super_flen = super->nof_nonstatic_fields();
duke@1 440 super_fields = super->_nonstatic_fields;
duke@1 441 assert(super_flen == 0 || super_fields != NULL, "first get nof_fields");
coleenp@360 442 // See if I am no larger than my super; if so, I can use his fields.
coleenp@360 443 if (fsize == super_fsize) {
coleenp@360 444 _nonstatic_fields = super_fields;
coleenp@360 445 return super_fields->length();
coleenp@360 446 }
duke@1 447 }
duke@1 448
duke@1 449 GrowableArray<ciField*>* fields = NULL;
duke@1 450 GUARDED_VM_ENTRY({
duke@1 451 fields = compute_nonstatic_fields_impl(super_fields);
duke@1 452 });
duke@1 453
duke@1 454 if (fields == NULL) {
duke@1 455 // This can happen if this class (java.lang.Class) has invisible fields.
duke@1 456 _nonstatic_fields = super_fields;
duke@1 457 return super_fields->length();
duke@1 458 }
duke@1 459
duke@1 460 int flen = fields->length();
duke@1 461
duke@1 462 // Now sort them by offset, ascending.
duke@1 463 // (In principle, they could mix with superclass fields.)
duke@1 464 fields->sort(sort_field_by_offset);
duke@1 465 _nonstatic_fields = fields;
duke@1 466 return flen;
duke@1 467 }
duke@1 468
duke@1 469 GrowableArray<ciField*>*
duke@1 470 ciInstanceKlass::compute_nonstatic_fields_impl(GrowableArray<ciField*>*
duke@1 471 super_fields) {
duke@1 472 ASSERT_IN_VM;
duke@1 473 Arena* arena = CURRENT_ENV->arena();
duke@1 474 int flen = 0;
duke@1 475 GrowableArray<ciField*>* fields = NULL;
coleenp@13728 476 InstanceKlass* k = get_instanceKlass();
never@10546 477 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
never@10546 478 if (fs.access_flags().is_static()) continue;
never@10546 479 flen += 1;
never@10546 480 }
duke@1 481
never@10546 482 // allocate the array:
never@10546 483 if (flen == 0) {
never@10546 484 return NULL; // return nothing if none are locally declared
never@10546 485 }
never@10546 486 if (super_fields != NULL) {
never@10546 487 flen += super_fields->length();
never@10546 488 }
never@10546 489 fields = new (arena) GrowableArray<ciField*>(arena, flen, 0, NULL);
never@10546 490 if (super_fields != NULL) {
never@10546 491 fields->appendAll(super_fields);
never@10546 492 }
never@10546 493
never@10546 494 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
never@10546 495 if (fs.access_flags().is_static()) continue;
never@10546 496 fieldDescriptor fd;
coleenp@13728 497 fd.initialize(k, fs.index());
never@10546 498 ciField* field = new (arena) ciField(&fd);
never@10546 499 fields->append(field);
duke@1 500 }
duke@1 501 assert(fields->length() == flen, "sanity");
duke@1 502 return fields;
duke@1 503 }
duke@1 504
duke@1 505 // ------------------------------------------------------------------
duke@1 506 // ciInstanceKlass::find_method
duke@1 507 //
duke@1 508 // Find a method in this klass.
duke@1 509 ciMethod* ciInstanceKlass::find_method(ciSymbol* name, ciSymbol* signature) {
duke@1 510 VM_ENTRY_MARK;
coleenp@13728 511 InstanceKlass* k = get_instanceKlass();
coleenp@8076 512 Symbol* name_sym = name->get_symbol();
coleenp@8076 513 Symbol* sig_sym= signature->get_symbol();
duke@1 514
coleenp@13728 515 Method* m = k->find_method(name_sym, sig_sym);
duke@1 516 if (m == NULL) return NULL;
duke@1 517
coleenp@13728 518 return CURRENT_THREAD_ENV->get_method(m);
duke@1 519 }
duke@1 520
duke@1 521 // ------------------------------------------------------------------
duke@1 522 // ciInstanceKlass::is_leaf_type
duke@1 523 bool ciInstanceKlass::is_leaf_type() {
duke@1 524 assert(is_loaded(), "must be loaded");
duke@1 525 if (is_shared()) {
duke@1 526 return is_final(); // approximately correct
duke@1 527 } else {
jiangli@12369 528 return !_has_subklass && (nof_implementors() == 0);
duke@1 529 }
duke@1 530 }
duke@1 531
duke@1 532 // ------------------------------------------------------------------
duke@1 533 // ciInstanceKlass::implementor
duke@1 534 //
duke@1 535 // Report an implementor of this interface.
duke@1 536 // Note that there are various races here, since my copy
duke@1 537 // of _nof_implementors might be out of date with respect
coleenp@13728 538 // to results returned by InstanceKlass::implementor.
duke@1 539 // This is OK, since any dependencies we decide to assert
duke@1 540 // will be checked later under the Compile_lock.
jiangli@12369 541 ciInstanceKlass* ciInstanceKlass::implementor() {
jiangli@12369 542 ciInstanceKlass* impl = _implementor;
duke@1 543 if (impl == NULL) {
duke@1 544 // Go into the VM to fetch the implementor.
duke@1 545 {
duke@1 546 VM_ENTRY_MARK;
coleenp@13728 547 Klass* k = get_instanceKlass()->implementor();
duke@1 548 if (k != NULL) {
coleenp@13728 549 if (k == get_instanceKlass()) {
jiangli@12369 550 // More than one implementors. Use 'this' in this case.
jiangli@12369 551 impl = this;
jiangli@12369 552 } else {
coleenp@13728 553 impl = CURRENT_THREAD_ENV->get_instance_klass(k);
jiangli@12369 554 }
duke@1 555 }
duke@1 556 }
duke@1 557 // Memoize this result.
duke@1 558 if (!is_shared()) {
jiangli@12369 559 _implementor = impl;
duke@1 560 }
duke@1 561 }
duke@1 562 return impl;
duke@1 563 }