annotate hotspot/src/share/vm/ci/ciInstanceKlass.cpp @ 10546:e79347eebbc5

7086585: make Java field injection more flexible Reviewed-by: jrose, twisti, kvn, coleenp
author never
date Sat, 10 Sep 2011 17:29:02 -0700
parents 8c1e3dd5fe1b
children 5399831730cd
rev   line source
duke@1 1 /*
never@8725 2 * Copyright (c) 1999, 2011, 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 //
duke@1 39 // This class represents a klassOop in the HotSpot virtual machine
duke@1 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");
duke@1 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;
never@5925 57 _init_state = (instanceKlass::ClassState)ik->get_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
duke@1 62 _nof_implementors = ik->nof_implementors();
duke@1 63 for (int i = 0; i < implementors_limit; i++) {
duke@1 64 _implementors[i] = NULL; // we will fill these lazily
duke@1 65 }
duke@1 66
duke@1 67 Thread *thread = Thread::current();
duke@1 68 if (ciObjectFactory::is_initialized()) {
duke@1 69 _loader = JNIHandles::make_local(thread, ik->class_loader());
duke@1 70 _protection_domain = JNIHandles::make_local(thread,
duke@1 71 ik->protection_domain());
duke@1 72 _is_shared = false;
duke@1 73 } else {
duke@1 74 Handle h_loader(thread, ik->class_loader());
duke@1 75 Handle h_protection_domain(thread, ik->protection_domain());
duke@1 76 _loader = JNIHandles::make_global(h_loader);
duke@1 77 _protection_domain = JNIHandles::make_global(h_protection_domain);
duke@1 78 _is_shared = true;
duke@1 79 }
duke@1 80
duke@1 81 // Lazy fields get filled in only upon request.
duke@1 82 _super = NULL;
duke@1 83 _java_mirror = NULL;
duke@1 84
duke@1 85 if (is_shared()) {
never@4571 86 if (h_k() != SystemDictionary::Object_klass()) {
duke@1 87 super();
duke@1 88 }
duke@1 89 //compute_nonstatic_fields(); // done outside of constructor
duke@1 90 }
duke@1 91
duke@1 92 _field_cache = NULL;
duke@1 93 }
duke@1 94
duke@1 95 // Version for unloaded classes:
duke@1 96 ciInstanceKlass::ciInstanceKlass(ciSymbol* name,
duke@1 97 jobject loader, jobject protection_domain)
duke@1 98 : ciKlass(name, ciInstanceKlassKlass::make())
duke@1 99 {
duke@1 100 assert(name->byte_at(0) != '[', "not an instance klass");
never@5925 101 _init_state = (instanceKlass::ClassState)0;
duke@1 102 _nonstatic_field_size = -1;
coleenp@360 103 _has_nonstatic_fields = false;
duke@1 104 _nonstatic_fields = NULL;
duke@1 105 _nof_implementors = -1;
duke@1 106 _loader = loader;
duke@1 107 _protection_domain = protection_domain;
duke@1 108 _is_shared = false;
duke@1 109 _super = NULL;
duke@1 110 _java_mirror = NULL;
duke@1 111 _field_cache = NULL;
duke@1 112 }
duke@1 113
duke@1 114
duke@1 115
duke@1 116 // ------------------------------------------------------------------
duke@1 117 // ciInstanceKlass::compute_shared_is_initialized
never@5925 118 void ciInstanceKlass::compute_shared_init_state() {
duke@1 119 GUARDED_VM_ENTRY(
duke@1 120 instanceKlass* ik = get_instanceKlass();
never@5925 121 _init_state = (instanceKlass::ClassState)ik->get_init_state();
duke@1 122 )
duke@1 123 }
duke@1 124
duke@1 125 // ------------------------------------------------------------------
duke@1 126 // ciInstanceKlass::compute_shared_has_subklass
duke@1 127 bool ciInstanceKlass::compute_shared_has_subklass() {
duke@1 128 GUARDED_VM_ENTRY(
duke@1 129 instanceKlass* ik = get_instanceKlass();
duke@1 130 _has_subklass = ik->subklass() != NULL;
duke@1 131 return _has_subklass;
duke@1 132 )
duke@1 133 }
duke@1 134
duke@1 135 // ------------------------------------------------------------------
duke@1 136 // ciInstanceKlass::compute_shared_nof_implementors
duke@1 137 int ciInstanceKlass::compute_shared_nof_implementors() {
duke@1 138 // We requery this property, since it is a very old ciObject.
duke@1 139 GUARDED_VM_ENTRY(
duke@1 140 instanceKlass* ik = get_instanceKlass();
duke@1 141 _nof_implementors = ik->nof_implementors();
duke@1 142 return _nof_implementors;
duke@1 143 )
duke@1 144 }
duke@1 145
duke@1 146 // ------------------------------------------------------------------
duke@1 147 // ciInstanceKlass::loader
duke@1 148 oop ciInstanceKlass::loader() {
duke@1 149 ASSERT_IN_VM;
duke@1 150 return JNIHandles::resolve(_loader);
duke@1 151 }
duke@1 152
duke@1 153 // ------------------------------------------------------------------
duke@1 154 // ciInstanceKlass::loader_handle
duke@1 155 jobject ciInstanceKlass::loader_handle() {
duke@1 156 return _loader;
duke@1 157 }
duke@1 158
duke@1 159 // ------------------------------------------------------------------
duke@1 160 // ciInstanceKlass::protection_domain
duke@1 161 oop ciInstanceKlass::protection_domain() {
duke@1 162 ASSERT_IN_VM;
duke@1 163 return JNIHandles::resolve(_protection_domain);
duke@1 164 }
duke@1 165
duke@1 166 // ------------------------------------------------------------------
duke@1 167 // ciInstanceKlass::protection_domain_handle
duke@1 168 jobject ciInstanceKlass::protection_domain_handle() {
duke@1 169 return _protection_domain;
duke@1 170 }
duke@1 171
duke@1 172 // ------------------------------------------------------------------
duke@1 173 // ciInstanceKlass::field_cache
duke@1 174 //
duke@1 175 // Get the field cache associated with this klass.
duke@1 176 ciConstantPoolCache* ciInstanceKlass::field_cache() {
duke@1 177 if (is_shared()) {
duke@1 178 return NULL;
duke@1 179 }
duke@1 180 if (_field_cache == NULL) {
duke@1 181 assert(!is_java_lang_Object(), "Object has no fields");
duke@1 182 Arena* arena = CURRENT_ENV->arena();
duke@1 183 _field_cache = new (arena) ciConstantPoolCache(arena, 5);
duke@1 184 }
duke@1 185 return _field_cache;
duke@1 186 }
duke@1 187
duke@1 188 // ------------------------------------------------------------------
duke@1 189 // ciInstanceKlass::get_canonical_holder
duke@1 190 //
duke@1 191 ciInstanceKlass* ciInstanceKlass::get_canonical_holder(int offset) {
duke@1 192 #ifdef ASSERT
duke@1 193 if (!(offset >= 0 && offset < layout_helper())) {
duke@1 194 tty->print("*** get_canonical_holder(%d) on ", offset);
duke@1 195 this->print();
duke@1 196 tty->print_cr(" ***");
duke@1 197 };
duke@1 198 assert(offset >= 0 && offset < layout_helper(), "offset must be tame");
duke@1 199 #endif
duke@1 200
coleenp@360 201 if (offset < instanceOopDesc::base_offset_in_bytes()) {
duke@1 202 // All header offsets belong properly to java/lang/Object.
duke@1 203 return CURRENT_ENV->Object_klass();
duke@1 204 }
duke@1 205
duke@1 206 ciInstanceKlass* self = this;
duke@1 207 for (;;) {
duke@1 208 assert(self->is_loaded(), "must be loaded to have size");
duke@1 209 ciInstanceKlass* super = self->super();
coleenp@360 210 if (super == NULL || super->nof_nonstatic_fields() == 0 ||
coleenp@360 211 !super->contains_field_offset(offset)) {
duke@1 212 return self;
duke@1 213 } else {
duke@1 214 self = super; // return super->get_canonical_holder(offset)
duke@1 215 }
duke@1 216 }
duke@1 217 }
duke@1 218
duke@1 219 // ------------------------------------------------------------------
duke@1 220 // ciInstanceKlass::is_java_lang_Object
duke@1 221 //
duke@1 222 // Is this klass java.lang.Object?
duke@1 223 bool ciInstanceKlass::is_java_lang_Object() {
duke@1 224 return equals(CURRENT_ENV->Object_klass());
duke@1 225 }
duke@1 226
duke@1 227 // ------------------------------------------------------------------
duke@1 228 // ciInstanceKlass::uses_default_loader
duke@1 229 bool ciInstanceKlass::uses_default_loader() {
twisti@4567 230 // Note: We do not need to resolve the handle or enter the VM
twisti@4567 231 // in order to test null-ness.
twisti@4567 232 return _loader == NULL;
twisti@4567 233 }
twisti@4567 234
twisti@4567 235 // ------------------------------------------------------------------
twisti@4567 236 // ciInstanceKlass::is_in_package
twisti@4567 237 //
twisti@4567 238 // Is this klass in the given package?
twisti@4567 239 bool ciInstanceKlass::is_in_package(const char* packagename, int len) {
twisti@4567 240 // To avoid class loader mischief, this test always rejects application classes.
twisti@4567 241 if (!uses_default_loader())
twisti@4567 242 return false;
twisti@4567 243 GUARDED_VM_ENTRY(
twisti@4567 244 return is_in_package_impl(packagename, len);
twisti@4567 245 )
twisti@4567 246 }
twisti@4567 247
twisti@4567 248 bool ciInstanceKlass::is_in_package_impl(const char* packagename, int len) {
twisti@4567 249 ASSERT_IN_VM;
twisti@4567 250
twisti@4567 251 // If packagename contains trailing '/' exclude it from the
twisti@4567 252 // prefix-test since we test for it explicitly.
twisti@4567 253 if (packagename[len - 1] == '/')
twisti@4567 254 len--;
twisti@4567 255
twisti@4567 256 if (!name()->starts_with(packagename, len))
twisti@4567 257 return false;
twisti@4567 258
twisti@4567 259 // Test if the class name is something like "java/lang".
twisti@4567 260 if ((len + 1) > name()->utf8_length())
twisti@4567 261 return false;
twisti@4567 262
twisti@4567 263 // Test for trailing '/'
twisti@4567 264 if ((char) name()->byte_at(len) != '/')
twisti@4567 265 return false;
twisti@4567 266
twisti@4567 267 // Make sure it's not actually in a subpackage:
twisti@4567 268 if (name()->index_of_at(len+1, "/", 1) >= 0)
twisti@4567 269 return false;
twisti@4567 270
twisti@4567 271 return true;
duke@1 272 }
duke@1 273
duke@1 274 // ------------------------------------------------------------------
duke@1 275 // ciInstanceKlass::print_impl
duke@1 276 //
duke@1 277 // Implementation of the print method.
duke@1 278 void ciInstanceKlass::print_impl(outputStream* st) {
duke@1 279 ciKlass::print_impl(st);
duke@1 280 GUARDED_VM_ENTRY(st->print(" loader=0x%x", (address)loader());)
duke@1 281 if (is_loaded()) {
duke@1 282 st->print(" loaded=true initialized=%s finalized=%s subklass=%s size=%d flags=",
duke@1 283 bool_to_str(is_initialized()),
duke@1 284 bool_to_str(has_finalizer()),
duke@1 285 bool_to_str(has_subklass()),
duke@1 286 layout_helper());
duke@1 287
duke@1 288 _flags.print_klass_flags();
duke@1 289
duke@1 290 if (_super) {
duke@1 291 st->print(" super=");
duke@1 292 _super->print_name();
duke@1 293 }
duke@1 294 if (_java_mirror) {
duke@1 295 st->print(" mirror=PRESENT");
duke@1 296 }
duke@1 297 } else {
duke@1 298 st->print(" loaded=false");
duke@1 299 }
duke@1 300 }
duke@1 301
duke@1 302 // ------------------------------------------------------------------
duke@1 303 // ciInstanceKlass::super
duke@1 304 //
duke@1 305 // Get the superklass of this klass.
duke@1 306 ciInstanceKlass* ciInstanceKlass::super() {
duke@1 307 assert(is_loaded(), "must be loaded");
duke@1 308 if (_super == NULL && !is_java_lang_Object()) {
duke@1 309 GUARDED_VM_ENTRY(
duke@1 310 klassOop super_klass = get_instanceKlass()->super();
duke@1 311 _super = CURRENT_ENV->get_object(super_klass)->as_instance_klass();
duke@1 312 )
duke@1 313 }
duke@1 314 return _super;
duke@1 315 }
duke@1 316
duke@1 317 // ------------------------------------------------------------------
duke@1 318 // ciInstanceKlass::java_mirror
duke@1 319 //
duke@1 320 // Get the instance of java.lang.Class corresponding to this klass.
jrose@5884 321 // Cache it on this->_java_mirror.
duke@1 322 ciInstance* ciInstanceKlass::java_mirror() {
never@8725 323 if (is_shared()) {
never@8725 324 return ciKlass::java_mirror();
never@8725 325 }
duke@1 326 if (_java_mirror == NULL) {
jrose@5884 327 _java_mirror = ciKlass::java_mirror();
duke@1 328 }
duke@1 329 return _java_mirror;
duke@1 330 }
duke@1 331
duke@1 332 // ------------------------------------------------------------------
duke@1 333 // ciInstanceKlass::unique_concrete_subklass
duke@1 334 ciInstanceKlass* ciInstanceKlass::unique_concrete_subklass() {
duke@1 335 if (!is_loaded()) return NULL; // No change if class is not loaded
duke@1 336 if (!is_abstract()) return NULL; // Only applies to abstract classes.
duke@1 337 if (!has_subklass()) return NULL; // Must have at least one subklass.
duke@1 338 VM_ENTRY_MARK;
duke@1 339 instanceKlass* ik = get_instanceKlass();
duke@1 340 Klass* up = ik->up_cast_abstract();
duke@1 341 assert(up->oop_is_instance(), "must be instanceKlass");
duke@1 342 if (ik == up) {
duke@1 343 return NULL;
duke@1 344 }
duke@1 345 return CURRENT_THREAD_ENV->get_object(up->as_klassOop())->as_instance_klass();
duke@1 346 }
duke@1 347
duke@1 348 // ------------------------------------------------------------------
duke@1 349 // ciInstanceKlass::has_finalizable_subclass
duke@1 350 bool ciInstanceKlass::has_finalizable_subclass() {
duke@1 351 if (!is_loaded()) return true;
duke@1 352 VM_ENTRY_MARK;
duke@1 353 return Dependencies::find_finalizable_subclass(get_instanceKlass()) != NULL;
duke@1 354 }
duke@1 355
duke@1 356 // ------------------------------------------------------------------
duke@1 357 // ciInstanceKlass::get_field_by_offset
duke@1 358 ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) {
duke@1 359 if (!is_static) {
duke@1 360 for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) {
duke@1 361 ciField* field = _nonstatic_fields->at(i);
duke@1 362 int field_off = field->offset_in_bytes();
duke@1 363 if (field_off == field_offset)
duke@1 364 return field;
duke@1 365 if (field_off > field_offset)
duke@1 366 break;
duke@1 367 // could do binary search or check bins, but probably not worth it
duke@1 368 }
duke@1 369 return NULL;
duke@1 370 }
duke@1 371 VM_ENTRY_MARK;
duke@1 372 instanceKlass* k = get_instanceKlass();
duke@1 373 fieldDescriptor fd;
duke@1 374 if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
duke@1 375 return NULL;
duke@1 376 }
duke@1 377 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
duke@1 378 return field;
duke@1 379 }
duke@1 380
kvn@217 381 // ------------------------------------------------------------------
never@4450 382 // ciInstanceKlass::get_field_by_name
never@4450 383 ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) {
never@4450 384 VM_ENTRY_MARK;
never@4450 385 instanceKlass* k = get_instanceKlass();
never@4450 386 fieldDescriptor fd;
coleenp@8076 387 klassOop def = k->find_field(name->get_symbol(), signature->get_symbol(), is_static, &fd);
never@4450 388 if (def == NULL) {
never@4450 389 return NULL;
never@4450 390 }
never@4450 391 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
never@4450 392 return field;
never@4450 393 }
never@4450 394
never@4450 395 // ------------------------------------------------------------------
kvn@217 396 // ciInstanceKlass::non_static_fields.
kvn@217 397
kvn@217 398 class NonStaticFieldFiller: public FieldClosure {
kvn@217 399 GrowableArray<ciField*>* _arr;
kvn@217 400 ciEnv* _curEnv;
kvn@217 401 public:
kvn@217 402 NonStaticFieldFiller(ciEnv* curEnv, GrowableArray<ciField*>* arr) :
kvn@217 403 _curEnv(curEnv), _arr(arr)
kvn@217 404 {}
kvn@217 405 void do_field(fieldDescriptor* fd) {
kvn@217 406 ciField* field = new (_curEnv->arena()) ciField(fd);
kvn@217 407 _arr->append(field);
kvn@217 408 }
kvn@217 409 };
kvn@217 410
kvn@217 411 GrowableArray<ciField*>* ciInstanceKlass::non_static_fields() {
kvn@217 412 if (_non_static_fields == NULL) {
kvn@217 413 VM_ENTRY_MARK;
kvn@217 414 ciEnv* curEnv = ciEnv::current();
kvn@217 415 instanceKlass* ik = get_instanceKlass();
never@10546 416 int max_n_fields = ik->java_fields_count();
kvn@217 417
kvn@6180 418 Arena* arena = curEnv->arena();
kvn@217 419 _non_static_fields =
kvn@6180 420 new (arena) GrowableArray<ciField*>(arena, max_n_fields, 0, NULL);
kvn@217 421 NonStaticFieldFiller filler(curEnv, _non_static_fields);
kvn@217 422 ik->do_nonstatic_fields(&filler);
kvn@217 423 }
kvn@217 424 return _non_static_fields;
kvn@217 425 }
kvn@217 426
duke@1 427 static int sort_field_by_offset(ciField** a, ciField** b) {
duke@1 428 return (*a)->offset_in_bytes() - (*b)->offset_in_bytes();
duke@1 429 // (no worries about 32-bit overflow...)
duke@1 430 }
duke@1 431
duke@1 432 // ------------------------------------------------------------------
duke@1 433 // ciInstanceKlass::compute_nonstatic_fields
duke@1 434 int ciInstanceKlass::compute_nonstatic_fields() {
duke@1 435 assert(is_loaded(), "must be loaded");
duke@1 436
duke@1 437 if (_nonstatic_fields != NULL)
duke@1 438 return _nonstatic_fields->length();
duke@1 439
coleenp@360 440 if (!has_nonstatic_fields()) {
duke@1 441 Arena* arena = CURRENT_ENV->arena();
duke@1 442 _nonstatic_fields = new (arena) GrowableArray<ciField*>(arena, 0, 0, NULL);
duke@1 443 return 0;
duke@1 444 }
duke@1 445 assert(!is_java_lang_Object(), "bootstrap OK");
duke@1 446
coleenp@360 447 // Size in bytes of my fields, including inherited fields.
kvn@591 448 int fsize = nonstatic_field_size() * heapOopSize;
coleenp@360 449
duke@1 450 ciInstanceKlass* super = this->super();
duke@1 451 GrowableArray<ciField*>* super_fields = NULL;
coleenp@360 452 if (super != NULL && super->has_nonstatic_fields()) {
kvn@591 453 int super_fsize = super->nonstatic_field_size() * heapOopSize;
coleenp@360 454 int super_flen = super->nof_nonstatic_fields();
duke@1 455 super_fields = super->_nonstatic_fields;
duke@1 456 assert(super_flen == 0 || super_fields != NULL, "first get nof_fields");
coleenp@360 457 // See if I am no larger than my super; if so, I can use his fields.
coleenp@360 458 if (fsize == super_fsize) {
coleenp@360 459 _nonstatic_fields = super_fields;
coleenp@360 460 return super_fields->length();
coleenp@360 461 }
duke@1 462 }
duke@1 463
duke@1 464 GrowableArray<ciField*>* fields = NULL;
duke@1 465 GUARDED_VM_ENTRY({
duke@1 466 fields = compute_nonstatic_fields_impl(super_fields);
duke@1 467 });
duke@1 468
duke@1 469 if (fields == NULL) {
duke@1 470 // This can happen if this class (java.lang.Class) has invisible fields.
duke@1 471 _nonstatic_fields = super_fields;
duke@1 472 return super_fields->length();
duke@1 473 }
duke@1 474
duke@1 475 int flen = fields->length();
duke@1 476
duke@1 477 // Now sort them by offset, ascending.
duke@1 478 // (In principle, they could mix with superclass fields.)
duke@1 479 fields->sort(sort_field_by_offset);
duke@1 480 _nonstatic_fields = fields;
duke@1 481 return flen;
duke@1 482 }
duke@1 483
duke@1 484 GrowableArray<ciField*>*
duke@1 485 ciInstanceKlass::compute_nonstatic_fields_impl(GrowableArray<ciField*>*
duke@1 486 super_fields) {
duke@1 487 ASSERT_IN_VM;
duke@1 488 Arena* arena = CURRENT_ENV->arena();
duke@1 489 int flen = 0;
duke@1 490 GrowableArray<ciField*>* fields = NULL;
duke@1 491 instanceKlass* k = get_instanceKlass();
never@10546 492 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
never@10546 493 if (fs.access_flags().is_static()) continue;
never@10546 494 flen += 1;
never@10546 495 }
duke@1 496
never@10546 497 // allocate the array:
never@10546 498 if (flen == 0) {
never@10546 499 return NULL; // return nothing if none are locally declared
never@10546 500 }
never@10546 501 if (super_fields != NULL) {
never@10546 502 flen += super_fields->length();
never@10546 503 }
never@10546 504 fields = new (arena) GrowableArray<ciField*>(arena, flen, 0, NULL);
never@10546 505 if (super_fields != NULL) {
never@10546 506 fields->appendAll(super_fields);
never@10546 507 }
never@10546 508
never@10546 509 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
never@10546 510 if (fs.access_flags().is_static()) continue;
never@10546 511 fieldDescriptor fd;
never@10546 512 fd.initialize(k->as_klassOop(), fs.index());
never@10546 513 ciField* field = new (arena) ciField(&fd);
never@10546 514 fields->append(field);
duke@1 515 }
duke@1 516 assert(fields->length() == flen, "sanity");
duke@1 517 return fields;
duke@1 518 }
duke@1 519
duke@1 520 // ------------------------------------------------------------------
duke@1 521 // ciInstanceKlass::find_method
duke@1 522 //
duke@1 523 // Find a method in this klass.
duke@1 524 ciMethod* ciInstanceKlass::find_method(ciSymbol* name, ciSymbol* signature) {
duke@1 525 VM_ENTRY_MARK;
duke@1 526 instanceKlass* k = get_instanceKlass();
coleenp@8076 527 Symbol* name_sym = name->get_symbol();
coleenp@8076 528 Symbol* sig_sym= signature->get_symbol();
duke@1 529
duke@1 530 methodOop m = k->find_method(name_sym, sig_sym);
duke@1 531 if (m == NULL) return NULL;
duke@1 532
duke@1 533 return CURRENT_THREAD_ENV->get_object(m)->as_method();
duke@1 534 }
duke@1 535
duke@1 536 // ------------------------------------------------------------------
duke@1 537 // ciInstanceKlass::is_leaf_type
duke@1 538 bool ciInstanceKlass::is_leaf_type() {
duke@1 539 assert(is_loaded(), "must be loaded");
duke@1 540 if (is_shared()) {
duke@1 541 return is_final(); // approximately correct
duke@1 542 } else {
duke@1 543 return !_has_subklass && (_nof_implementors == 0);
duke@1 544 }
duke@1 545 }
duke@1 546
duke@1 547 // ------------------------------------------------------------------
duke@1 548 // ciInstanceKlass::implementor
duke@1 549 //
duke@1 550 // Report an implementor of this interface.
duke@1 551 // Returns NULL if exact information is not available.
duke@1 552 // Note that there are various races here, since my copy
duke@1 553 // of _nof_implementors might be out of date with respect
duke@1 554 // to results returned by instanceKlass::implementor.
duke@1 555 // This is OK, since any dependencies we decide to assert
duke@1 556 // will be checked later under the Compile_lock.
duke@1 557 ciInstanceKlass* ciInstanceKlass::implementor(int n) {
kvn@7125 558 if (n >= implementors_limit) {
duke@1 559 return NULL;
duke@1 560 }
duke@1 561 ciInstanceKlass* impl = _implementors[n];
duke@1 562 if (impl == NULL) {
duke@1 563 if (_nof_implementors > implementors_limit) {
duke@1 564 return NULL;
duke@1 565 }
duke@1 566 // Go into the VM to fetch the implementor.
duke@1 567 {
duke@1 568 VM_ENTRY_MARK;
duke@1 569 klassOop k = get_instanceKlass()->implementor(n);
duke@1 570 if (k != NULL) {
duke@1 571 impl = CURRENT_THREAD_ENV->get_object(k)->as_instance_klass();
duke@1 572 }
duke@1 573 }
duke@1 574 // Memoize this result.
duke@1 575 if (!is_shared()) {
duke@1 576 _implementors[n] = (impl == NULL)? this: impl;
duke@1 577 }
duke@1 578 } else if (impl == this) {
duke@1 579 impl = NULL; // memoized null result from a VM query
duke@1 580 }
duke@1 581 return impl;
duke@1 582 }