Mon, 12 Jul 2010 10:58:25 -0700
6958668: repeated uncommon trapping for new of klass which is being initialized
Reviewed-by: kvn, jrose
duke@435 | 1 | /* |
never@2000 | 2 | * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | #include "incls/_precompiled.incl" |
duke@435 | 26 | #include "incls/_ciInstanceKlass.cpp.incl" |
duke@435 | 27 | |
duke@435 | 28 | // ciInstanceKlass |
duke@435 | 29 | // |
duke@435 | 30 | // This class represents a klassOop in the HotSpot virtual machine |
duke@435 | 31 | // whose Klass part in an instanceKlass. |
duke@435 | 32 | |
duke@435 | 33 | // ------------------------------------------------------------------ |
duke@435 | 34 | // ciInstanceKlass::ciInstanceKlass |
duke@435 | 35 | // |
duke@435 | 36 | // Loaded instance klass. |
kvn@479 | 37 | ciInstanceKlass::ciInstanceKlass(KlassHandle h_k) : |
kvn@479 | 38 | ciKlass(h_k), _non_static_fields(NULL) |
kvn@479 | 39 | { |
duke@435 | 40 | assert(get_Klass()->oop_is_instance(), "wrong type"); |
duke@435 | 41 | instanceKlass* ik = get_instanceKlass(); |
duke@435 | 42 | |
duke@435 | 43 | AccessFlags access_flags = ik->access_flags(); |
duke@435 | 44 | _flags = ciFlags(access_flags); |
duke@435 | 45 | _has_finalizer = access_flags.has_finalizer(); |
duke@435 | 46 | _has_subklass = ik->subklass() != NULL; |
never@2000 | 47 | _init_state = (instanceKlass::ClassState)ik->get_init_state(); |
duke@435 | 48 | _nonstatic_field_size = ik->nonstatic_field_size(); |
coleenp@548 | 49 | _has_nonstatic_fields = ik->has_nonstatic_fields(); |
duke@435 | 50 | _nonstatic_fields = NULL; // initialized lazily by compute_nonstatic_fields: |
duke@435 | 51 | |
duke@435 | 52 | _nof_implementors = ik->nof_implementors(); |
duke@435 | 53 | for (int i = 0; i < implementors_limit; i++) { |
duke@435 | 54 | _implementors[i] = NULL; // we will fill these lazily |
duke@435 | 55 | } |
duke@435 | 56 | |
duke@435 | 57 | Thread *thread = Thread::current(); |
duke@435 | 58 | if (ciObjectFactory::is_initialized()) { |
duke@435 | 59 | _loader = JNIHandles::make_local(thread, ik->class_loader()); |
duke@435 | 60 | _protection_domain = JNIHandles::make_local(thread, |
duke@435 | 61 | ik->protection_domain()); |
duke@435 | 62 | _is_shared = false; |
duke@435 | 63 | } else { |
duke@435 | 64 | Handle h_loader(thread, ik->class_loader()); |
duke@435 | 65 | Handle h_protection_domain(thread, ik->protection_domain()); |
duke@435 | 66 | _loader = JNIHandles::make_global(h_loader); |
duke@435 | 67 | _protection_domain = JNIHandles::make_global(h_protection_domain); |
duke@435 | 68 | _is_shared = true; |
duke@435 | 69 | } |
duke@435 | 70 | |
duke@435 | 71 | // Lazy fields get filled in only upon request. |
duke@435 | 72 | _super = NULL; |
duke@435 | 73 | _java_mirror = NULL; |
duke@435 | 74 | |
duke@435 | 75 | if (is_shared()) { |
never@1577 | 76 | if (h_k() != SystemDictionary::Object_klass()) { |
duke@435 | 77 | super(); |
duke@435 | 78 | } |
duke@435 | 79 | java_mirror(); |
duke@435 | 80 | //compute_nonstatic_fields(); // done outside of constructor |
duke@435 | 81 | } |
duke@435 | 82 | |
duke@435 | 83 | _field_cache = NULL; |
duke@435 | 84 | } |
duke@435 | 85 | |
duke@435 | 86 | // Version for unloaded classes: |
duke@435 | 87 | ciInstanceKlass::ciInstanceKlass(ciSymbol* name, |
duke@435 | 88 | jobject loader, jobject protection_domain) |
duke@435 | 89 | : ciKlass(name, ciInstanceKlassKlass::make()) |
duke@435 | 90 | { |
duke@435 | 91 | assert(name->byte_at(0) != '[', "not an instance klass"); |
never@2000 | 92 | _init_state = (instanceKlass::ClassState)0; |
duke@435 | 93 | _nonstatic_field_size = -1; |
coleenp@548 | 94 | _has_nonstatic_fields = false; |
duke@435 | 95 | _nonstatic_fields = NULL; |
duke@435 | 96 | _nof_implementors = -1; |
duke@435 | 97 | _loader = loader; |
duke@435 | 98 | _protection_domain = protection_domain; |
duke@435 | 99 | _is_shared = false; |
duke@435 | 100 | _super = NULL; |
duke@435 | 101 | _java_mirror = NULL; |
duke@435 | 102 | _field_cache = NULL; |
duke@435 | 103 | } |
duke@435 | 104 | |
duke@435 | 105 | |
duke@435 | 106 | |
duke@435 | 107 | // ------------------------------------------------------------------ |
duke@435 | 108 | // ciInstanceKlass::compute_shared_is_initialized |
never@2000 | 109 | void ciInstanceKlass::compute_shared_init_state() { |
duke@435 | 110 | GUARDED_VM_ENTRY( |
duke@435 | 111 | instanceKlass* ik = get_instanceKlass(); |
never@2000 | 112 | _init_state = (instanceKlass::ClassState)ik->get_init_state(); |
duke@435 | 113 | ) |
duke@435 | 114 | } |
duke@435 | 115 | |
duke@435 | 116 | // ------------------------------------------------------------------ |
duke@435 | 117 | // ciInstanceKlass::compute_shared_has_subklass |
duke@435 | 118 | bool ciInstanceKlass::compute_shared_has_subklass() { |
duke@435 | 119 | GUARDED_VM_ENTRY( |
duke@435 | 120 | instanceKlass* ik = get_instanceKlass(); |
duke@435 | 121 | _has_subklass = ik->subklass() != NULL; |
duke@435 | 122 | return _has_subklass; |
duke@435 | 123 | ) |
duke@435 | 124 | } |
duke@435 | 125 | |
duke@435 | 126 | // ------------------------------------------------------------------ |
duke@435 | 127 | // ciInstanceKlass::compute_shared_nof_implementors |
duke@435 | 128 | int ciInstanceKlass::compute_shared_nof_implementors() { |
duke@435 | 129 | // We requery this property, since it is a very old ciObject. |
duke@435 | 130 | GUARDED_VM_ENTRY( |
duke@435 | 131 | instanceKlass* ik = get_instanceKlass(); |
duke@435 | 132 | _nof_implementors = ik->nof_implementors(); |
duke@435 | 133 | return _nof_implementors; |
duke@435 | 134 | ) |
duke@435 | 135 | } |
duke@435 | 136 | |
duke@435 | 137 | // ------------------------------------------------------------------ |
duke@435 | 138 | // ciInstanceKlass::loader |
duke@435 | 139 | oop ciInstanceKlass::loader() { |
duke@435 | 140 | ASSERT_IN_VM; |
duke@435 | 141 | return JNIHandles::resolve(_loader); |
duke@435 | 142 | } |
duke@435 | 143 | |
duke@435 | 144 | // ------------------------------------------------------------------ |
duke@435 | 145 | // ciInstanceKlass::loader_handle |
duke@435 | 146 | jobject ciInstanceKlass::loader_handle() { |
duke@435 | 147 | return _loader; |
duke@435 | 148 | } |
duke@435 | 149 | |
duke@435 | 150 | // ------------------------------------------------------------------ |
duke@435 | 151 | // ciInstanceKlass::protection_domain |
duke@435 | 152 | oop ciInstanceKlass::protection_domain() { |
duke@435 | 153 | ASSERT_IN_VM; |
duke@435 | 154 | return JNIHandles::resolve(_protection_domain); |
duke@435 | 155 | } |
duke@435 | 156 | |
duke@435 | 157 | // ------------------------------------------------------------------ |
duke@435 | 158 | // ciInstanceKlass::protection_domain_handle |
duke@435 | 159 | jobject ciInstanceKlass::protection_domain_handle() { |
duke@435 | 160 | return _protection_domain; |
duke@435 | 161 | } |
duke@435 | 162 | |
duke@435 | 163 | // ------------------------------------------------------------------ |
duke@435 | 164 | // ciInstanceKlass::field_cache |
duke@435 | 165 | // |
duke@435 | 166 | // Get the field cache associated with this klass. |
duke@435 | 167 | ciConstantPoolCache* ciInstanceKlass::field_cache() { |
duke@435 | 168 | if (is_shared()) { |
duke@435 | 169 | return NULL; |
duke@435 | 170 | } |
duke@435 | 171 | if (_field_cache == NULL) { |
duke@435 | 172 | assert(!is_java_lang_Object(), "Object has no fields"); |
duke@435 | 173 | Arena* arena = CURRENT_ENV->arena(); |
duke@435 | 174 | _field_cache = new (arena) ciConstantPoolCache(arena, 5); |
duke@435 | 175 | } |
duke@435 | 176 | return _field_cache; |
duke@435 | 177 | } |
duke@435 | 178 | |
duke@435 | 179 | // ------------------------------------------------------------------ |
duke@435 | 180 | // ciInstanceKlass::get_canonical_holder |
duke@435 | 181 | // |
duke@435 | 182 | ciInstanceKlass* ciInstanceKlass::get_canonical_holder(int offset) { |
duke@435 | 183 | #ifdef ASSERT |
duke@435 | 184 | if (!(offset >= 0 && offset < layout_helper())) { |
duke@435 | 185 | tty->print("*** get_canonical_holder(%d) on ", offset); |
duke@435 | 186 | this->print(); |
duke@435 | 187 | tty->print_cr(" ***"); |
duke@435 | 188 | }; |
duke@435 | 189 | assert(offset >= 0 && offset < layout_helper(), "offset must be tame"); |
duke@435 | 190 | #endif |
duke@435 | 191 | |
coleenp@548 | 192 | if (offset < instanceOopDesc::base_offset_in_bytes()) { |
duke@435 | 193 | // All header offsets belong properly to java/lang/Object. |
duke@435 | 194 | return CURRENT_ENV->Object_klass(); |
duke@435 | 195 | } |
duke@435 | 196 | |
duke@435 | 197 | ciInstanceKlass* self = this; |
duke@435 | 198 | for (;;) { |
duke@435 | 199 | assert(self->is_loaded(), "must be loaded to have size"); |
duke@435 | 200 | ciInstanceKlass* super = self->super(); |
coleenp@548 | 201 | if (super == NULL || super->nof_nonstatic_fields() == 0 || |
coleenp@548 | 202 | !super->contains_field_offset(offset)) { |
duke@435 | 203 | return self; |
duke@435 | 204 | } else { |
duke@435 | 205 | self = super; // return super->get_canonical_holder(offset) |
duke@435 | 206 | } |
duke@435 | 207 | } |
duke@435 | 208 | } |
duke@435 | 209 | |
duke@435 | 210 | // ------------------------------------------------------------------ |
duke@435 | 211 | // ciInstanceKlass::is_java_lang_Object |
duke@435 | 212 | // |
duke@435 | 213 | // Is this klass java.lang.Object? |
duke@435 | 214 | bool ciInstanceKlass::is_java_lang_Object() { |
duke@435 | 215 | return equals(CURRENT_ENV->Object_klass()); |
duke@435 | 216 | } |
duke@435 | 217 | |
duke@435 | 218 | // ------------------------------------------------------------------ |
duke@435 | 219 | // ciInstanceKlass::uses_default_loader |
duke@435 | 220 | bool ciInstanceKlass::uses_default_loader() { |
twisti@1573 | 221 | // Note: We do not need to resolve the handle or enter the VM |
twisti@1573 | 222 | // in order to test null-ness. |
twisti@1573 | 223 | return _loader == NULL; |
twisti@1573 | 224 | } |
twisti@1573 | 225 | |
twisti@1573 | 226 | // ------------------------------------------------------------------ |
twisti@1573 | 227 | // ciInstanceKlass::is_in_package |
twisti@1573 | 228 | // |
twisti@1573 | 229 | // Is this klass in the given package? |
twisti@1573 | 230 | bool ciInstanceKlass::is_in_package(const char* packagename, int len) { |
twisti@1573 | 231 | // To avoid class loader mischief, this test always rejects application classes. |
twisti@1573 | 232 | if (!uses_default_loader()) |
twisti@1573 | 233 | return false; |
twisti@1573 | 234 | GUARDED_VM_ENTRY( |
twisti@1573 | 235 | return is_in_package_impl(packagename, len); |
twisti@1573 | 236 | ) |
twisti@1573 | 237 | } |
twisti@1573 | 238 | |
twisti@1573 | 239 | bool ciInstanceKlass::is_in_package_impl(const char* packagename, int len) { |
twisti@1573 | 240 | ASSERT_IN_VM; |
twisti@1573 | 241 | |
twisti@1573 | 242 | // If packagename contains trailing '/' exclude it from the |
twisti@1573 | 243 | // prefix-test since we test for it explicitly. |
twisti@1573 | 244 | if (packagename[len - 1] == '/') |
twisti@1573 | 245 | len--; |
twisti@1573 | 246 | |
twisti@1573 | 247 | if (!name()->starts_with(packagename, len)) |
twisti@1573 | 248 | return false; |
twisti@1573 | 249 | |
twisti@1573 | 250 | // Test if the class name is something like "java/lang". |
twisti@1573 | 251 | if ((len + 1) > name()->utf8_length()) |
twisti@1573 | 252 | return false; |
twisti@1573 | 253 | |
twisti@1573 | 254 | // Test for trailing '/' |
twisti@1573 | 255 | if ((char) name()->byte_at(len) != '/') |
twisti@1573 | 256 | return false; |
twisti@1573 | 257 | |
twisti@1573 | 258 | // Make sure it's not actually in a subpackage: |
twisti@1573 | 259 | if (name()->index_of_at(len+1, "/", 1) >= 0) |
twisti@1573 | 260 | return false; |
twisti@1573 | 261 | |
twisti@1573 | 262 | return true; |
duke@435 | 263 | } |
duke@435 | 264 | |
duke@435 | 265 | // ------------------------------------------------------------------ |
duke@435 | 266 | // ciInstanceKlass::print_impl |
duke@435 | 267 | // |
duke@435 | 268 | // Implementation of the print method. |
duke@435 | 269 | void ciInstanceKlass::print_impl(outputStream* st) { |
duke@435 | 270 | ciKlass::print_impl(st); |
duke@435 | 271 | GUARDED_VM_ENTRY(st->print(" loader=0x%x", (address)loader());) |
duke@435 | 272 | if (is_loaded()) { |
duke@435 | 273 | st->print(" loaded=true initialized=%s finalized=%s subklass=%s size=%d flags=", |
duke@435 | 274 | bool_to_str(is_initialized()), |
duke@435 | 275 | bool_to_str(has_finalizer()), |
duke@435 | 276 | bool_to_str(has_subklass()), |
duke@435 | 277 | layout_helper()); |
duke@435 | 278 | |
duke@435 | 279 | _flags.print_klass_flags(); |
duke@435 | 280 | |
duke@435 | 281 | if (_super) { |
duke@435 | 282 | st->print(" super="); |
duke@435 | 283 | _super->print_name(); |
duke@435 | 284 | } |
duke@435 | 285 | if (_java_mirror) { |
duke@435 | 286 | st->print(" mirror=PRESENT"); |
duke@435 | 287 | } |
duke@435 | 288 | } else { |
duke@435 | 289 | st->print(" loaded=false"); |
duke@435 | 290 | } |
duke@435 | 291 | } |
duke@435 | 292 | |
duke@435 | 293 | // ------------------------------------------------------------------ |
duke@435 | 294 | // ciInstanceKlass::super |
duke@435 | 295 | // |
duke@435 | 296 | // Get the superklass of this klass. |
duke@435 | 297 | ciInstanceKlass* ciInstanceKlass::super() { |
duke@435 | 298 | assert(is_loaded(), "must be loaded"); |
duke@435 | 299 | if (_super == NULL && !is_java_lang_Object()) { |
duke@435 | 300 | GUARDED_VM_ENTRY( |
duke@435 | 301 | klassOop super_klass = get_instanceKlass()->super(); |
duke@435 | 302 | _super = CURRENT_ENV->get_object(super_klass)->as_instance_klass(); |
duke@435 | 303 | ) |
duke@435 | 304 | } |
duke@435 | 305 | return _super; |
duke@435 | 306 | } |
duke@435 | 307 | |
duke@435 | 308 | // ------------------------------------------------------------------ |
duke@435 | 309 | // ciInstanceKlass::java_mirror |
duke@435 | 310 | // |
duke@435 | 311 | // Get the instance of java.lang.Class corresponding to this klass. |
jrose@1959 | 312 | // Cache it on this->_java_mirror. |
duke@435 | 313 | ciInstance* ciInstanceKlass::java_mirror() { |
duke@435 | 314 | if (_java_mirror == NULL) { |
jrose@1959 | 315 | _java_mirror = ciKlass::java_mirror(); |
duke@435 | 316 | } |
duke@435 | 317 | return _java_mirror; |
duke@435 | 318 | } |
duke@435 | 319 | |
duke@435 | 320 | // ------------------------------------------------------------------ |
duke@435 | 321 | // ciInstanceKlass::unique_concrete_subklass |
duke@435 | 322 | ciInstanceKlass* ciInstanceKlass::unique_concrete_subklass() { |
duke@435 | 323 | if (!is_loaded()) return NULL; // No change if class is not loaded |
duke@435 | 324 | if (!is_abstract()) return NULL; // Only applies to abstract classes. |
duke@435 | 325 | if (!has_subklass()) return NULL; // Must have at least one subklass. |
duke@435 | 326 | VM_ENTRY_MARK; |
duke@435 | 327 | instanceKlass* ik = get_instanceKlass(); |
duke@435 | 328 | Klass* up = ik->up_cast_abstract(); |
duke@435 | 329 | assert(up->oop_is_instance(), "must be instanceKlass"); |
duke@435 | 330 | if (ik == up) { |
duke@435 | 331 | return NULL; |
duke@435 | 332 | } |
duke@435 | 333 | return CURRENT_THREAD_ENV->get_object(up->as_klassOop())->as_instance_klass(); |
duke@435 | 334 | } |
duke@435 | 335 | |
duke@435 | 336 | // ------------------------------------------------------------------ |
duke@435 | 337 | // ciInstanceKlass::has_finalizable_subclass |
duke@435 | 338 | bool ciInstanceKlass::has_finalizable_subclass() { |
duke@435 | 339 | if (!is_loaded()) return true; |
duke@435 | 340 | VM_ENTRY_MARK; |
duke@435 | 341 | return Dependencies::find_finalizable_subclass(get_instanceKlass()) != NULL; |
duke@435 | 342 | } |
duke@435 | 343 | |
duke@435 | 344 | // ------------------------------------------------------------------ |
duke@435 | 345 | // ciInstanceKlass::get_field_by_offset |
duke@435 | 346 | ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) { |
duke@435 | 347 | if (!is_static) { |
duke@435 | 348 | for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) { |
duke@435 | 349 | ciField* field = _nonstatic_fields->at(i); |
duke@435 | 350 | int field_off = field->offset_in_bytes(); |
duke@435 | 351 | if (field_off == field_offset) |
duke@435 | 352 | return field; |
duke@435 | 353 | if (field_off > field_offset) |
duke@435 | 354 | break; |
duke@435 | 355 | // could do binary search or check bins, but probably not worth it |
duke@435 | 356 | } |
duke@435 | 357 | return NULL; |
duke@435 | 358 | } |
duke@435 | 359 | VM_ENTRY_MARK; |
duke@435 | 360 | instanceKlass* k = get_instanceKlass(); |
duke@435 | 361 | fieldDescriptor fd; |
duke@435 | 362 | if (!k->find_field_from_offset(field_offset, is_static, &fd)) { |
duke@435 | 363 | return NULL; |
duke@435 | 364 | } |
duke@435 | 365 | ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd); |
duke@435 | 366 | return field; |
duke@435 | 367 | } |
duke@435 | 368 | |
kvn@479 | 369 | // ------------------------------------------------------------------ |
never@1515 | 370 | // ciInstanceKlass::get_field_by_name |
never@1515 | 371 | ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) { |
never@1515 | 372 | VM_ENTRY_MARK; |
never@1515 | 373 | instanceKlass* k = get_instanceKlass(); |
never@1515 | 374 | fieldDescriptor fd; |
never@1515 | 375 | klassOop def = k->find_field(name->get_symbolOop(), signature->get_symbolOop(), is_static, &fd); |
never@1515 | 376 | if (def == NULL) { |
never@1515 | 377 | return NULL; |
never@1515 | 378 | } |
never@1515 | 379 | ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd); |
never@1515 | 380 | return field; |
never@1515 | 381 | } |
never@1515 | 382 | |
never@1515 | 383 | // ------------------------------------------------------------------ |
kvn@479 | 384 | // ciInstanceKlass::non_static_fields. |
kvn@479 | 385 | |
kvn@479 | 386 | class NonStaticFieldFiller: public FieldClosure { |
kvn@479 | 387 | GrowableArray<ciField*>* _arr; |
kvn@479 | 388 | ciEnv* _curEnv; |
kvn@479 | 389 | public: |
kvn@479 | 390 | NonStaticFieldFiller(ciEnv* curEnv, GrowableArray<ciField*>* arr) : |
kvn@479 | 391 | _curEnv(curEnv), _arr(arr) |
kvn@479 | 392 | {} |
kvn@479 | 393 | void do_field(fieldDescriptor* fd) { |
kvn@479 | 394 | ciField* field = new (_curEnv->arena()) ciField(fd); |
kvn@479 | 395 | _arr->append(field); |
kvn@479 | 396 | } |
kvn@479 | 397 | }; |
kvn@479 | 398 | |
kvn@479 | 399 | GrowableArray<ciField*>* ciInstanceKlass::non_static_fields() { |
kvn@479 | 400 | if (_non_static_fields == NULL) { |
kvn@479 | 401 | VM_ENTRY_MARK; |
kvn@479 | 402 | ciEnv* curEnv = ciEnv::current(); |
kvn@479 | 403 | instanceKlass* ik = get_instanceKlass(); |
kvn@479 | 404 | int max_n_fields = ik->fields()->length()/instanceKlass::next_offset; |
kvn@479 | 405 | |
kvn@479 | 406 | _non_static_fields = |
kvn@479 | 407 | new (curEnv->arena()) GrowableArray<ciField*>(max_n_fields); |
kvn@479 | 408 | NonStaticFieldFiller filler(curEnv, _non_static_fields); |
kvn@479 | 409 | ik->do_nonstatic_fields(&filler); |
kvn@479 | 410 | } |
kvn@479 | 411 | return _non_static_fields; |
kvn@479 | 412 | } |
kvn@479 | 413 | |
duke@435 | 414 | static int sort_field_by_offset(ciField** a, ciField** b) { |
duke@435 | 415 | return (*a)->offset_in_bytes() - (*b)->offset_in_bytes(); |
duke@435 | 416 | // (no worries about 32-bit overflow...) |
duke@435 | 417 | } |
duke@435 | 418 | |
duke@435 | 419 | // ------------------------------------------------------------------ |
duke@435 | 420 | // ciInstanceKlass::compute_nonstatic_fields |
duke@435 | 421 | int ciInstanceKlass::compute_nonstatic_fields() { |
duke@435 | 422 | assert(is_loaded(), "must be loaded"); |
duke@435 | 423 | |
duke@435 | 424 | if (_nonstatic_fields != NULL) |
duke@435 | 425 | return _nonstatic_fields->length(); |
duke@435 | 426 | |
coleenp@548 | 427 | if (!has_nonstatic_fields()) { |
duke@435 | 428 | Arena* arena = CURRENT_ENV->arena(); |
duke@435 | 429 | _nonstatic_fields = new (arena) GrowableArray<ciField*>(arena, 0, 0, NULL); |
duke@435 | 430 | return 0; |
duke@435 | 431 | } |
duke@435 | 432 | assert(!is_java_lang_Object(), "bootstrap OK"); |
duke@435 | 433 | |
coleenp@548 | 434 | // Size in bytes of my fields, including inherited fields. |
kvn@600 | 435 | int fsize = nonstatic_field_size() * heapOopSize; |
coleenp@548 | 436 | |
duke@435 | 437 | ciInstanceKlass* super = this->super(); |
duke@435 | 438 | GrowableArray<ciField*>* super_fields = NULL; |
coleenp@548 | 439 | if (super != NULL && super->has_nonstatic_fields()) { |
kvn@600 | 440 | int super_fsize = super->nonstatic_field_size() * heapOopSize; |
coleenp@548 | 441 | int super_flen = super->nof_nonstatic_fields(); |
duke@435 | 442 | super_fields = super->_nonstatic_fields; |
duke@435 | 443 | assert(super_flen == 0 || super_fields != NULL, "first get nof_fields"); |
coleenp@548 | 444 | // See if I am no larger than my super; if so, I can use his fields. |
coleenp@548 | 445 | if (fsize == super_fsize) { |
coleenp@548 | 446 | _nonstatic_fields = super_fields; |
coleenp@548 | 447 | return super_fields->length(); |
coleenp@548 | 448 | } |
duke@435 | 449 | } |
duke@435 | 450 | |
duke@435 | 451 | GrowableArray<ciField*>* fields = NULL; |
duke@435 | 452 | GUARDED_VM_ENTRY({ |
duke@435 | 453 | fields = compute_nonstatic_fields_impl(super_fields); |
duke@435 | 454 | }); |
duke@435 | 455 | |
duke@435 | 456 | if (fields == NULL) { |
duke@435 | 457 | // This can happen if this class (java.lang.Class) has invisible fields. |
duke@435 | 458 | _nonstatic_fields = super_fields; |
duke@435 | 459 | return super_fields->length(); |
duke@435 | 460 | } |
duke@435 | 461 | |
duke@435 | 462 | int flen = fields->length(); |
duke@435 | 463 | |
duke@435 | 464 | // Now sort them by offset, ascending. |
duke@435 | 465 | // (In principle, they could mix with superclass fields.) |
duke@435 | 466 | fields->sort(sort_field_by_offset); |
duke@435 | 467 | #ifdef ASSERT |
coleenp@548 | 468 | int last_offset = instanceOopDesc::base_offset_in_bytes(); |
duke@435 | 469 | for (int i = 0; i < fields->length(); i++) { |
duke@435 | 470 | ciField* field = fields->at(i); |
duke@435 | 471 | int offset = field->offset_in_bytes(); |
coleenp@548 | 472 | int size = (field->_type == NULL) ? heapOopSize : field->size_in_bytes(); |
duke@435 | 473 | assert(last_offset <= offset, "no field overlap"); |
duke@435 | 474 | if (last_offset > (int)sizeof(oopDesc)) |
duke@435 | 475 | assert((offset - last_offset) < BytesPerLong, "no big holes"); |
duke@435 | 476 | // Note: Two consecutive T_BYTE fields will be separated by wordSize-1 |
duke@435 | 477 | // padding bytes if one of them is declared by a superclass. |
duke@435 | 478 | // This is a minor inefficiency classFileParser.cpp. |
duke@435 | 479 | last_offset = offset + size; |
duke@435 | 480 | } |
kvn@600 | 481 | assert(last_offset <= (int)instanceOopDesc::base_offset_in_bytes() + fsize, "no overflow"); |
duke@435 | 482 | #endif |
duke@435 | 483 | |
duke@435 | 484 | _nonstatic_fields = fields; |
duke@435 | 485 | return flen; |
duke@435 | 486 | } |
duke@435 | 487 | |
duke@435 | 488 | GrowableArray<ciField*>* |
duke@435 | 489 | ciInstanceKlass::compute_nonstatic_fields_impl(GrowableArray<ciField*>* |
duke@435 | 490 | super_fields) { |
duke@435 | 491 | ASSERT_IN_VM; |
duke@435 | 492 | Arena* arena = CURRENT_ENV->arena(); |
duke@435 | 493 | int flen = 0; |
duke@435 | 494 | GrowableArray<ciField*>* fields = NULL; |
duke@435 | 495 | instanceKlass* k = get_instanceKlass(); |
duke@435 | 496 | typeArrayOop fields_array = k->fields(); |
duke@435 | 497 | for (int pass = 0; pass <= 1; pass++) { |
duke@435 | 498 | for (int i = 0, alen = fields_array->length(); i < alen; i += instanceKlass::next_offset) { |
duke@435 | 499 | fieldDescriptor fd; |
duke@435 | 500 | fd.initialize(k->as_klassOop(), i); |
duke@435 | 501 | if (fd.is_static()) continue; |
duke@435 | 502 | if (pass == 0) { |
duke@435 | 503 | flen += 1; |
duke@435 | 504 | } else { |
duke@435 | 505 | ciField* field = new (arena) ciField(&fd); |
duke@435 | 506 | fields->append(field); |
duke@435 | 507 | } |
duke@435 | 508 | } |
duke@435 | 509 | |
duke@435 | 510 | // Between passes, allocate the array: |
duke@435 | 511 | if (pass == 0) { |
duke@435 | 512 | if (flen == 0) { |
duke@435 | 513 | return NULL; // return nothing if none are locally declared |
duke@435 | 514 | } |
duke@435 | 515 | if (super_fields != NULL) { |
duke@435 | 516 | flen += super_fields->length(); |
duke@435 | 517 | } |
duke@435 | 518 | fields = new (arena) GrowableArray<ciField*>(arena, flen, 0, NULL); |
duke@435 | 519 | if (super_fields != NULL) { |
duke@435 | 520 | fields->appendAll(super_fields); |
duke@435 | 521 | } |
duke@435 | 522 | } |
duke@435 | 523 | } |
duke@435 | 524 | assert(fields->length() == flen, "sanity"); |
duke@435 | 525 | return fields; |
duke@435 | 526 | } |
duke@435 | 527 | |
duke@435 | 528 | // ------------------------------------------------------------------ |
duke@435 | 529 | // ciInstanceKlass::find_method |
duke@435 | 530 | // |
duke@435 | 531 | // Find a method in this klass. |
duke@435 | 532 | ciMethod* ciInstanceKlass::find_method(ciSymbol* name, ciSymbol* signature) { |
duke@435 | 533 | VM_ENTRY_MARK; |
duke@435 | 534 | instanceKlass* k = get_instanceKlass(); |
duke@435 | 535 | symbolOop name_sym = name->get_symbolOop(); |
duke@435 | 536 | symbolOop sig_sym= signature->get_symbolOop(); |
duke@435 | 537 | |
duke@435 | 538 | methodOop m = k->find_method(name_sym, sig_sym); |
duke@435 | 539 | if (m == NULL) return NULL; |
duke@435 | 540 | |
duke@435 | 541 | return CURRENT_THREAD_ENV->get_object(m)->as_method(); |
duke@435 | 542 | } |
duke@435 | 543 | |
duke@435 | 544 | // ------------------------------------------------------------------ |
duke@435 | 545 | // ciInstanceKlass::is_leaf_type |
duke@435 | 546 | bool ciInstanceKlass::is_leaf_type() { |
duke@435 | 547 | assert(is_loaded(), "must be loaded"); |
duke@435 | 548 | if (is_shared()) { |
duke@435 | 549 | return is_final(); // approximately correct |
duke@435 | 550 | } else { |
duke@435 | 551 | return !_has_subklass && (_nof_implementors == 0); |
duke@435 | 552 | } |
duke@435 | 553 | } |
duke@435 | 554 | |
duke@435 | 555 | // ------------------------------------------------------------------ |
duke@435 | 556 | // ciInstanceKlass::implementor |
duke@435 | 557 | // |
duke@435 | 558 | // Report an implementor of this interface. |
duke@435 | 559 | // Returns NULL if exact information is not available. |
duke@435 | 560 | // Note that there are various races here, since my copy |
duke@435 | 561 | // of _nof_implementors might be out of date with respect |
duke@435 | 562 | // to results returned by instanceKlass::implementor. |
duke@435 | 563 | // This is OK, since any dependencies we decide to assert |
duke@435 | 564 | // will be checked later under the Compile_lock. |
duke@435 | 565 | ciInstanceKlass* ciInstanceKlass::implementor(int n) { |
duke@435 | 566 | if (n > implementors_limit) { |
duke@435 | 567 | return NULL; |
duke@435 | 568 | } |
duke@435 | 569 | ciInstanceKlass* impl = _implementors[n]; |
duke@435 | 570 | if (impl == NULL) { |
duke@435 | 571 | if (_nof_implementors > implementors_limit) { |
duke@435 | 572 | return NULL; |
duke@435 | 573 | } |
duke@435 | 574 | // Go into the VM to fetch the implementor. |
duke@435 | 575 | { |
duke@435 | 576 | VM_ENTRY_MARK; |
duke@435 | 577 | klassOop k = get_instanceKlass()->implementor(n); |
duke@435 | 578 | if (k != NULL) { |
duke@435 | 579 | impl = CURRENT_THREAD_ENV->get_object(k)->as_instance_klass(); |
duke@435 | 580 | } |
duke@435 | 581 | } |
duke@435 | 582 | // Memoize this result. |
duke@435 | 583 | if (!is_shared()) { |
duke@435 | 584 | _implementors[n] = (impl == NULL)? this: impl; |
duke@435 | 585 | } |
duke@435 | 586 | } else if (impl == this) { |
duke@435 | 587 | impl = NULL; // memoized null result from a VM query |
duke@435 | 588 | } |
duke@435 | 589 | return impl; |
duke@435 | 590 | } |