annotate src/share/vm/oops/constantPoolOop.cpp @ 579:0fbdb4381b99

6814575: Update copyright year Summary: Update copyright for files that have been modified in 2009, up to 03/09 Reviewed-by: katleman, tbell, ohair
author xdono
date Mon, 09 Mar 2009 13:28:46 -0700
parents fc7ab6287598
children be93aad57795
rev   line source
duke@0 1 /*
xdono@579 2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved.
duke@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@0 4 *
duke@0 5 * This code is free software; you can redistribute it and/or modify it
duke@0 6 * under the terms of the GNU General Public License version 2 only, as
duke@0 7 * published by the Free Software Foundation.
duke@0 8 *
duke@0 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@0 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@0 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@0 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@0 13 * accompanied this code).
duke@0 14 *
duke@0 15 * You should have received a copy of the GNU General Public License version
duke@0 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@0 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@0 18 *
duke@0 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@0 20 * CA 95054 USA or visit www.sun.com if you need additional information or
duke@0 21 * have any questions.
duke@0 22 *
duke@0 23 */
duke@0 24
duke@0 25 # include "incls/_precompiled.incl"
duke@0 26 # include "incls/_constantPoolOop.cpp.incl"
duke@0 27
jrose@431 28 void constantPoolOopDesc::set_flag_at(FlagBit fb) {
jrose@431 29 const int MAX_STATE_CHANGES = 2;
jrose@431 30 for (int i = MAX_STATE_CHANGES + 10; i > 0; i--) {
jrose@431 31 int oflags = _flags;
jrose@431 32 int nflags = oflags | (1 << (int)fb);
jrose@431 33 if (Atomic::cmpxchg(nflags, &_flags, oflags) == oflags)
jrose@431 34 return;
jrose@431 35 }
jrose@431 36 assert(false, "failed to cmpxchg flags");
jrose@431 37 _flags |= (1 << (int)fb); // better than nothing
jrose@431 38 }
jrose@431 39
duke@0 40 klassOop constantPoolOopDesc::klass_at_impl(constantPoolHandle this_oop, int which, TRAPS) {
duke@0 41 // A resolved constantPool entry will contain a klassOop, otherwise a symbolOop.
duke@0 42 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and
duke@0 43 // tag is not updated atomicly.
duke@0 44 oop entry = *(this_oop->obj_at_addr(which));
duke@0 45 if (entry->is_klass()) {
duke@0 46 // Already resolved - return entry.
duke@0 47 return (klassOop)entry;
duke@0 48 }
duke@0 49
duke@0 50 // Acquire lock on constant oop while doing update. After we get the lock, we check if another object
duke@0 51 // already has updated the object
duke@0 52 assert(THREAD->is_Java_thread(), "must be a Java thread");
duke@0 53 bool do_resolve = false;
duke@0 54 bool in_error = false;
duke@0 55
duke@0 56 symbolHandle name;
duke@0 57 Handle loader;
duke@0 58 { ObjectLocker ol(this_oop, THREAD);
duke@0 59
duke@0 60 if (this_oop->tag_at(which).is_unresolved_klass()) {
duke@0 61 if (this_oop->tag_at(which).is_unresolved_klass_in_error()) {
duke@0 62 in_error = true;
duke@0 63 } else {
duke@0 64 do_resolve = true;
duke@0 65 name = symbolHandle(THREAD, this_oop->unresolved_klass_at(which));
duke@0 66 loader = Handle(THREAD, instanceKlass::cast(this_oop->pool_holder())->class_loader());
duke@0 67 }
duke@0 68 }
duke@0 69 } // unlocking constantPool
duke@0 70
duke@0 71
duke@0 72 // The original attempt to resolve this constant pool entry failed so find the
duke@0 73 // original error and throw it again (JVMS 5.4.3).
duke@0 74 if (in_error) {
duke@0 75 symbolOop error = SystemDictionary::find_resolution_error(this_oop, which);
duke@0 76 guarantee(error != (symbolOop)NULL, "tag mismatch with resolution error table");
duke@0 77 ResourceMark rm;
duke@0 78 // exception text will be the class name
duke@0 79 const char* className = this_oop->unresolved_klass_at(which)->as_C_string();
duke@0 80 THROW_MSG_0(error, className);
duke@0 81 }
duke@0 82
duke@0 83 if (do_resolve) {
duke@0 84 // this_oop must be unlocked during resolve_or_fail
duke@0 85 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain();
duke@0 86 Handle h_prot (THREAD, protection_domain);
duke@0 87 klassOop k_oop = SystemDictionary::resolve_or_fail(name, loader, h_prot, true, THREAD);
duke@0 88 KlassHandle k;
duke@0 89 if (!HAS_PENDING_EXCEPTION) {
duke@0 90 k = KlassHandle(THREAD, k_oop);
duke@0 91 // Do access check for klasses
duke@0 92 verify_constant_pool_resolve(this_oop, k, THREAD);
duke@0 93 }
duke@0 94
duke@0 95 // Failed to resolve class. We must record the errors so that subsequent attempts
duke@0 96 // to resolve this constant pool entry fail with the same error (JVMS 5.4.3).
duke@0 97 if (HAS_PENDING_EXCEPTION) {
duke@0 98 ResourceMark rm;
duke@0 99 symbolHandle error(PENDING_EXCEPTION->klass()->klass_part()->name());
duke@0 100
duke@0 101 bool throw_orig_error = false;
duke@0 102 {
duke@0 103 ObjectLocker ol (this_oop, THREAD);
duke@0 104
duke@0 105 // some other thread has beaten us and has resolved the class.
duke@0 106 if (this_oop->tag_at(which).is_klass()) {
duke@0 107 CLEAR_PENDING_EXCEPTION;
duke@0 108 entry = this_oop->resolved_klass_at(which);
duke@0 109 return (klassOop)entry;
duke@0 110 }
duke@0 111
duke@0 112 if (!PENDING_EXCEPTION->
duke@0 113 is_a(SystemDictionary::linkageError_klass())) {
duke@0 114 // Just throw the exception and don't prevent these classes from
duke@0 115 // being loaded due to virtual machine errors like StackOverflow
duke@0 116 // and OutOfMemoryError, etc, or if the thread was hit by stop()
duke@0 117 // Needs clarification to section 5.4.3 of the VM spec (see 6308271)
duke@0 118 }
duke@0 119 else if (!this_oop->tag_at(which).is_unresolved_klass_in_error()) {
duke@0 120 SystemDictionary::add_resolution_error(this_oop, which, error);
duke@0 121 this_oop->tag_at_put(which, JVM_CONSTANT_UnresolvedClassInError);
duke@0 122 } else {
duke@0 123 // some other thread has put the class in error state.
duke@0 124 error = symbolHandle(SystemDictionary::find_resolution_error(this_oop, which));
duke@0 125 assert(!error.is_null(), "checking");
duke@0 126 throw_orig_error = true;
duke@0 127 }
duke@0 128 } // unlocked
duke@0 129
duke@0 130 if (throw_orig_error) {
duke@0 131 CLEAR_PENDING_EXCEPTION;
duke@0 132 ResourceMark rm;
duke@0 133 const char* className = this_oop->unresolved_klass_at(which)->as_C_string();
duke@0 134 THROW_MSG_0(error, className);
duke@0 135 }
duke@0 136
duke@0 137 return 0;
duke@0 138 }
duke@0 139
duke@0 140 if (TraceClassResolution && !k()->klass_part()->oop_is_array()) {
duke@0 141 // skip resolving the constant pool so that this code get's
duke@0 142 // called the next time some bytecodes refer to this class.
duke@0 143 ResourceMark rm;
duke@0 144 int line_number = -1;
duke@0 145 const char * source_file = NULL;
duke@0 146 if (JavaThread::current()->has_last_Java_frame()) {
duke@0 147 // try to identify the method which called this function.
duke@0 148 vframeStream vfst(JavaThread::current());
duke@0 149 if (!vfst.at_end()) {
duke@0 150 line_number = vfst.method()->line_number_from_bci(vfst.bci());
duke@0 151 symbolOop s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name();
duke@0 152 if (s != NULL) {
duke@0 153 source_file = s->as_C_string();
duke@0 154 }
duke@0 155 }
duke@0 156 }
duke@0 157 if (k() != this_oop->pool_holder()) {
duke@0 158 // only print something if the classes are different
duke@0 159 if (source_file != NULL) {
duke@0 160 tty->print("RESOLVE %s %s %s:%d\n",
duke@0 161 instanceKlass::cast(this_oop->pool_holder())->external_name(),
duke@0 162 instanceKlass::cast(k())->external_name(), source_file, line_number);
duke@0 163 } else {
duke@0 164 tty->print("RESOLVE %s %s\n",
duke@0 165 instanceKlass::cast(this_oop->pool_holder())->external_name(),
duke@0 166 instanceKlass::cast(k())->external_name());
duke@0 167 }
duke@0 168 }
duke@0 169 return k();
duke@0 170 } else {
duke@0 171 ObjectLocker ol (this_oop, THREAD);
duke@0 172 // Only updated constant pool - if it is resolved.
duke@0 173 do_resolve = this_oop->tag_at(which).is_unresolved_klass();
duke@0 174 if (do_resolve) {
duke@0 175 this_oop->klass_at_put(which, k());
duke@0 176 }
duke@0 177 }
duke@0 178 }
duke@0 179
duke@0 180 entry = this_oop->resolved_klass_at(which);
duke@0 181 assert(entry->is_klass(), "must be resolved at this point");
duke@0 182 return (klassOop)entry;
duke@0 183 }
duke@0 184
duke@0 185
duke@0 186 // Does not update constantPoolOop - to avoid any exception throwing. Used
duke@0 187 // by compiler and exception handling. Also used to avoid classloads for
duke@0 188 // instanceof operations. Returns NULL if the class has not been loaded or
duke@0 189 // if the verification of constant pool failed
duke@0 190 klassOop constantPoolOopDesc::klass_at_if_loaded(constantPoolHandle this_oop, int which) {
duke@0 191 oop entry = *this_oop->obj_at_addr(which);
duke@0 192 if (entry->is_klass()) {
duke@0 193 return (klassOop)entry;
duke@0 194 } else {
duke@0 195 assert(entry->is_symbol(), "must be either symbol or klass");
duke@0 196 Thread *thread = Thread::current();
duke@0 197 symbolHandle name (thread, (symbolOop)entry);
duke@0 198 oop loader = instanceKlass::cast(this_oop->pool_holder())->class_loader();
duke@0 199 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain();
duke@0 200 Handle h_prot (thread, protection_domain);
duke@0 201 Handle h_loader (thread, loader);
duke@0 202 klassOop k = SystemDictionary::find(name, h_loader, h_prot, thread);
duke@0 203
duke@0 204 if (k != NULL) {
duke@0 205 // Make sure that resolving is legal
duke@0 206 EXCEPTION_MARK;
duke@0 207 KlassHandle klass(THREAD, k);
duke@0 208 // return NULL if verification fails
duke@0 209 verify_constant_pool_resolve(this_oop, klass, THREAD);
duke@0 210 if (HAS_PENDING_EXCEPTION) {
duke@0 211 CLEAR_PENDING_EXCEPTION;
duke@0 212 return NULL;
duke@0 213 }
duke@0 214 return klass();
duke@0 215 } else {
duke@0 216 return k;
duke@0 217 }
duke@0 218 }
duke@0 219 }
duke@0 220
duke@0 221
duke@0 222 klassOop constantPoolOopDesc::klass_ref_at_if_loaded(constantPoolHandle this_oop, int which) {
duke@0 223 return klass_at_if_loaded(this_oop, this_oop->klass_ref_index_at(which));
duke@0 224 }
duke@0 225
duke@0 226
duke@0 227 // This is an interface for the compiler that allows accessing non-resolved entries
duke@0 228 // in the constant pool - but still performs the validations tests. Must be used
duke@0 229 // in a pre-parse of the compiler - to determine what it can do and not do.
duke@0 230 // Note: We cannot update the ConstantPool from the vm_thread.
duke@0 231 klassOop constantPoolOopDesc::klass_ref_at_if_loaded_check(constantPoolHandle this_oop, int index, TRAPS) {
duke@0 232 int which = this_oop->klass_ref_index_at(index);
duke@0 233 oop entry = *this_oop->obj_at_addr(which);
duke@0 234 if (entry->is_klass()) {
duke@0 235 return (klassOop)entry;
duke@0 236 } else {
duke@0 237 assert(entry->is_symbol(), "must be either symbol or klass");
duke@0 238 symbolHandle name (THREAD, (symbolOop)entry);
duke@0 239 oop loader = instanceKlass::cast(this_oop->pool_holder())->class_loader();
duke@0 240 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain();
duke@0 241 Handle h_loader(THREAD, loader);
duke@0 242 Handle h_prot (THREAD, protection_domain);
duke@0 243 KlassHandle k(THREAD, SystemDictionary::find(name, h_loader, h_prot, THREAD));
duke@0 244
duke@0 245 // Do access check for klasses
duke@0 246 if( k.not_null() ) verify_constant_pool_resolve(this_oop, k, CHECK_NULL);
duke@0 247 return k();
duke@0 248 }
duke@0 249 }
duke@0 250
duke@0 251
duke@0 252 symbolOop constantPoolOopDesc::uncached_name_ref_at(int which) {
duke@0 253 jint ref_index = name_and_type_at(uncached_name_and_type_ref_index_at(which));
duke@0 254 int name_index = extract_low_short_from_int(ref_index);
duke@0 255 return symbol_at(name_index);
duke@0 256 }
duke@0 257
duke@0 258
duke@0 259 symbolOop constantPoolOopDesc::uncached_signature_ref_at(int which) {
duke@0 260 jint ref_index = name_and_type_at(uncached_name_and_type_ref_index_at(which));
duke@0 261 int signature_index = extract_high_short_from_int(ref_index);
duke@0 262 return symbol_at(signature_index);
duke@0 263 }
duke@0 264
duke@0 265
duke@0 266 int constantPoolOopDesc::uncached_name_and_type_ref_index_at(int which) {
duke@0 267 jint ref_index = field_or_method_at(which, true);
duke@0 268 return extract_high_short_from_int(ref_index);
duke@0 269 }
duke@0 270
duke@0 271
duke@0 272 int constantPoolOopDesc::uncached_klass_ref_index_at(int which) {
duke@0 273 jint ref_index = field_or_method_at(which, true);
duke@0 274 return extract_low_short_from_int(ref_index);
duke@0 275 }
duke@0 276
duke@0 277
duke@0 278 void constantPoolOopDesc::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) {
duke@0 279 if (k->oop_is_instance() || k->oop_is_objArray()) {
duke@0 280 instanceKlassHandle holder (THREAD, this_oop->pool_holder());
duke@0 281 klassOop elem_oop = k->oop_is_instance() ? k() : objArrayKlass::cast(k())->bottom_klass();
duke@0 282 KlassHandle element (THREAD, elem_oop);
duke@0 283
duke@0 284 // The element type could be a typeArray - we only need the access check if it is
duke@0 285 // an reference to another class
duke@0 286 if (element->oop_is_instance()) {
duke@0 287 LinkResolver::check_klass_accessability(holder, element, CHECK);
duke@0 288 }
duke@0 289 }
duke@0 290 }
duke@0 291
duke@0 292
duke@0 293 int constantPoolOopDesc::klass_ref_index_at(int which) {
duke@0 294 jint ref_index = field_or_method_at(which, false);
duke@0 295 return extract_low_short_from_int(ref_index);
duke@0 296 }
duke@0 297
duke@0 298
duke@0 299 int constantPoolOopDesc::name_and_type_ref_index_at(int which) {
duke@0 300 jint ref_index = field_or_method_at(which, false);
duke@0 301 return extract_high_short_from_int(ref_index);
duke@0 302 }
duke@0 303
duke@0 304
duke@0 305 int constantPoolOopDesc::name_ref_index_at(int which) {
duke@0 306 jint ref_index = name_and_type_at(which);
duke@0 307 return extract_low_short_from_int(ref_index);
duke@0 308 }
duke@0 309
duke@0 310
duke@0 311 int constantPoolOopDesc::signature_ref_index_at(int which) {
duke@0 312 jint ref_index = name_and_type_at(which);
duke@0 313 return extract_high_short_from_int(ref_index);
duke@0 314 }
duke@0 315
duke@0 316
duke@0 317 klassOop constantPoolOopDesc::klass_ref_at(int which, TRAPS) {
duke@0 318 return klass_at(klass_ref_index_at(which), CHECK_NULL);
duke@0 319 }
duke@0 320
duke@0 321
duke@0 322 symbolOop constantPoolOopDesc::klass_name_at(int which) {
duke@0 323 assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(),
duke@0 324 "Corrupted constant pool");
duke@0 325 // A resolved constantPool entry will contain a klassOop, otherwise a symbolOop.
duke@0 326 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and
duke@0 327 // tag is not updated atomicly.
duke@0 328 oop entry = *(obj_at_addr(which));
duke@0 329 if (entry->is_klass()) {
duke@0 330 // Already resolved - return entry's name.
duke@0 331 return klassOop(entry)->klass_part()->name();
duke@0 332 } else {
duke@0 333 assert(entry->is_symbol(), "must be either symbol or klass");
duke@0 334 return (symbolOop)entry;
duke@0 335 }
duke@0 336 }
duke@0 337
duke@0 338 symbolOop constantPoolOopDesc::klass_ref_at_noresolve(int which) {
duke@0 339 jint ref_index = klass_ref_index_at(which);
duke@0 340 return klass_at_noresolve(ref_index);
duke@0 341 }
duke@0 342
duke@0 343 char* constantPoolOopDesc::string_at_noresolve(int which) {
duke@0 344 // Test entry type in case string is resolved while in here.
duke@0 345 oop entry = *(obj_at_addr(which));
duke@0 346 if (entry->is_symbol()) {
duke@0 347 return ((symbolOop)entry)->as_C_string();
jrose@431 348 } else if (java_lang_String::is_instance(entry)) {
jrose@431 349 return java_lang_String::as_utf8_string(entry);
duke@0 350 } else {
jrose@431 351 return (char*)"<pseudo-string>";
duke@0 352 }
duke@0 353 }
duke@0 354
duke@0 355
duke@0 356 symbolOop constantPoolOopDesc::name_ref_at(int which) {
duke@0 357 jint ref_index = name_and_type_at(name_and_type_ref_index_at(which));
duke@0 358 int name_index = extract_low_short_from_int(ref_index);
duke@0 359 return symbol_at(name_index);
duke@0 360 }
duke@0 361
duke@0 362
duke@0 363 symbolOop constantPoolOopDesc::signature_ref_at(int which) {
duke@0 364 jint ref_index = name_and_type_at(name_and_type_ref_index_at(which));
duke@0 365 int signature_index = extract_high_short_from_int(ref_index);
duke@0 366 return symbol_at(signature_index);
duke@0 367 }
duke@0 368
duke@0 369
duke@0 370 BasicType constantPoolOopDesc::basic_type_for_signature_at(int which) {
duke@0 371 return FieldType::basic_type(symbol_at(which));
duke@0 372 }
duke@0 373
duke@0 374
duke@0 375 void constantPoolOopDesc::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) {
duke@0 376 for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused
duke@0 377 if (this_oop->tag_at(index).is_unresolved_string()) {
duke@0 378 this_oop->string_at(index, CHECK);
duke@0 379 }
duke@0 380 }
duke@0 381 }
duke@0 382
duke@0 383 oop constantPoolOopDesc::string_at_impl(constantPoolHandle this_oop, int which, TRAPS) {
duke@0 384 oop entry = *(this_oop->obj_at_addr(which));
duke@0 385 if (entry->is_symbol()) {
duke@0 386 ObjectLocker ol(this_oop, THREAD);
duke@0 387 if (this_oop->tag_at(which).is_unresolved_string()) {
duke@0 388 // Intern string
duke@0 389 symbolOop sym = this_oop->unresolved_string_at(which);
duke@0 390 entry = StringTable::intern(sym, CHECK_(constantPoolOop(NULL)));
duke@0 391 this_oop->string_at_put(which, entry);
duke@0 392 } else {
duke@0 393 // Another thread beat us and interned string, read string from constant pool
duke@0 394 entry = this_oop->resolved_string_at(which);
duke@0 395 }
duke@0 396 }
duke@0 397 assert(java_lang_String::is_instance(entry), "must be string");
duke@0 398 return entry;
duke@0 399 }
duke@0 400
duke@0 401
jrose@431 402 bool constantPoolOopDesc::is_pseudo_string_at(int which) {
jrose@431 403 oop entry = *(obj_at_addr(which));
jrose@431 404 if (entry->is_symbol())
jrose@431 405 // Not yet resolved, but it will resolve to a string.
jrose@431 406 return false;
jrose@431 407 else if (java_lang_String::is_instance(entry))
jrose@431 408 return false; // actually, it might be a non-interned or non-perm string
jrose@431 409 else
jrose@431 410 // truly pseudo
jrose@431 411 return true;
jrose@431 412 }
jrose@431 413
jrose@431 414
duke@0 415 bool constantPoolOopDesc::klass_name_at_matches(instanceKlassHandle k,
duke@0 416 int which) {
duke@0 417 // Names are interned, so we can compare symbolOops directly
duke@0 418 symbolOop cp_name = klass_name_at(which);
duke@0 419 return (cp_name == k->name());
duke@0 420 }
duke@0 421
duke@0 422
duke@0 423 int constantPoolOopDesc::pre_resolve_shared_klasses(TRAPS) {
duke@0 424 ResourceMark rm;
duke@0 425 int count = 0;
duke@0 426 for (int index = 1; index < tags()->length(); index++) { // Index 0 is unused
duke@0 427 if (tag_at(index).is_unresolved_string()) {
duke@0 428 // Intern string
duke@0 429 symbolOop sym = unresolved_string_at(index);
duke@0 430 oop entry = StringTable::intern(sym, CHECK_(-1));
duke@0 431 string_at_put(index, entry);
duke@0 432 }
duke@0 433 }
duke@0 434 return count;
duke@0 435 }
duke@0 436
duke@0 437
duke@0 438 // Iterate over symbols which are used as class, field, method names and
duke@0 439 // signatures (in preparation for writing to the shared archive).
duke@0 440
duke@0 441 void constantPoolOopDesc::shared_symbols_iterate(OopClosure* closure) {
duke@0 442 for (int index = 1; index < length(); index++) { // Index 0 is unused
duke@0 443 switch (tag_at(index).value()) {
duke@0 444
duke@0 445 case JVM_CONSTANT_UnresolvedClass:
duke@0 446 closure->do_oop(obj_at_addr(index));
duke@0 447 break;
duke@0 448
duke@0 449 case JVM_CONSTANT_NameAndType:
duke@0 450 {
duke@0 451 int i = *int_at_addr(index);
duke@0 452 closure->do_oop(obj_at_addr((unsigned)i >> 16));
duke@0 453 closure->do_oop(obj_at_addr((unsigned)i & 0xffff));
duke@0 454 }
duke@0 455 break;
duke@0 456
duke@0 457 case JVM_CONSTANT_Class:
duke@0 458 case JVM_CONSTANT_InterfaceMethodref:
duke@0 459 case JVM_CONSTANT_Fieldref:
duke@0 460 case JVM_CONSTANT_Methodref:
duke@0 461 case JVM_CONSTANT_Integer:
duke@0 462 case JVM_CONSTANT_Float:
duke@0 463 // Do nothing! Not an oop.
duke@0 464 // These constant types do not reference symbols at this point.
duke@0 465 break;
duke@0 466
duke@0 467 case JVM_CONSTANT_String:
duke@0 468 // Do nothing! Not a symbol.
duke@0 469 break;
duke@0 470
duke@0 471 case JVM_CONSTANT_UnresolvedString:
duke@0 472 case JVM_CONSTANT_Utf8:
duke@0 473 // These constants are symbols, but unless these symbols are
duke@0 474 // actually to be used for something, we don't want to mark them.
duke@0 475 break;
duke@0 476
duke@0 477 case JVM_CONSTANT_Long:
duke@0 478 case JVM_CONSTANT_Double:
duke@0 479 // Do nothing! Not an oop. (But takes two pool entries.)
duke@0 480 ++index;
duke@0 481 break;
duke@0 482
duke@0 483 default:
duke@0 484 ShouldNotReachHere();
duke@0 485 break;
duke@0 486 }
duke@0 487 }
duke@0 488 }
duke@0 489
duke@0 490
duke@0 491 // Iterate over the [one] tags array (in preparation for writing to the
duke@0 492 // shared archive).
duke@0 493
duke@0 494 void constantPoolOopDesc::shared_tags_iterate(OopClosure* closure) {
duke@0 495 closure->do_oop(tags_addr());
duke@0 496 }
duke@0 497
duke@0 498
duke@0 499 // Iterate over String objects (in preparation for writing to the shared
duke@0 500 // archive).
duke@0 501
duke@0 502 void constantPoolOopDesc::shared_strings_iterate(OopClosure* closure) {
duke@0 503 for (int index = 1; index < length(); index++) { // Index 0 is unused
duke@0 504 switch (tag_at(index).value()) {
duke@0 505
duke@0 506 case JVM_CONSTANT_UnresolvedClass:
duke@0 507 case JVM_CONSTANT_NameAndType:
duke@0 508 // Do nothing! Not a String.
duke@0 509 break;
duke@0 510
duke@0 511 case JVM_CONSTANT_Class:
duke@0 512 case JVM_CONSTANT_InterfaceMethodref:
duke@0 513 case JVM_CONSTANT_Fieldref:
duke@0 514 case JVM_CONSTANT_Methodref:
duke@0 515 case JVM_CONSTANT_Integer:
duke@0 516 case JVM_CONSTANT_Float:
duke@0 517 // Do nothing! Not an oop.
duke@0 518 // These constant types do not reference symbols at this point.
duke@0 519 break;
duke@0 520
duke@0 521 case JVM_CONSTANT_String:
duke@0 522 closure->do_oop(obj_at_addr(index));
duke@0 523 break;
duke@0 524
duke@0 525 case JVM_CONSTANT_UnresolvedString:
duke@0 526 case JVM_CONSTANT_Utf8:
duke@0 527 // These constants are symbols, but unless these symbols are
duke@0 528 // actually to be used for something, we don't want to mark them.
duke@0 529 break;
duke@0 530
duke@0 531 case JVM_CONSTANT_Long:
duke@0 532 case JVM_CONSTANT_Double:
duke@0 533 // Do nothing! Not an oop. (But takes two pool entries.)
duke@0 534 ++index;
duke@0 535 break;
duke@0 536
duke@0 537 default:
duke@0 538 ShouldNotReachHere();
duke@0 539 break;
duke@0 540 }
duke@0 541 }
duke@0 542 }
duke@0 543
duke@0 544
duke@0 545 // Compare this constant pool's entry at index1 to the constant pool
duke@0 546 // cp2's entry at index2.
duke@0 547 bool constantPoolOopDesc::compare_entry_to(int index1, constantPoolHandle cp2,
duke@0 548 int index2, TRAPS) {
duke@0 549
duke@0 550 jbyte t1 = tag_at(index1).value();
duke@0 551 jbyte t2 = cp2->tag_at(index2).value();
duke@0 552
duke@0 553
duke@0 554 // JVM_CONSTANT_UnresolvedClassInError is equal to JVM_CONSTANT_UnresolvedClass
duke@0 555 // when comparing
duke@0 556 if (t1 == JVM_CONSTANT_UnresolvedClassInError) {
duke@0 557 t1 = JVM_CONSTANT_UnresolvedClass;
duke@0 558 }
duke@0 559 if (t2 == JVM_CONSTANT_UnresolvedClassInError) {
duke@0 560 t2 = JVM_CONSTANT_UnresolvedClass;
duke@0 561 }
duke@0 562
duke@0 563 if (t1 != t2) {
duke@0 564 // Not the same entry type so there is nothing else to check. Note
duke@0 565 // that this style of checking will consider resolved/unresolved
duke@0 566 // class pairs and resolved/unresolved string pairs as different.
duke@0 567 // From the constantPoolOop API point of view, this is correct
duke@0 568 // behavior. See constantPoolKlass::merge() to see how this plays
duke@0 569 // out in the context of constantPoolOop merging.
duke@0 570 return false;
duke@0 571 }
duke@0 572
duke@0 573 switch (t1) {
duke@0 574 case JVM_CONSTANT_Class:
duke@0 575 {
duke@0 576 klassOop k1 = klass_at(index1, CHECK_false);
duke@0 577 klassOop k2 = cp2->klass_at(index2, CHECK_false);
duke@0 578 if (k1 == k2) {
duke@0 579 return true;
duke@0 580 }
duke@0 581 } break;
duke@0 582
duke@0 583 case JVM_CONSTANT_ClassIndex:
duke@0 584 {
duke@0 585 int recur1 = klass_index_at(index1);
duke@0 586 int recur2 = cp2->klass_index_at(index2);
duke@0 587 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 588 if (match) {
duke@0 589 return true;
duke@0 590 }
duke@0 591 } break;
duke@0 592
duke@0 593 case JVM_CONSTANT_Double:
duke@0 594 {
duke@0 595 jdouble d1 = double_at(index1);
duke@0 596 jdouble d2 = cp2->double_at(index2);
duke@0 597 if (d1 == d2) {
duke@0 598 return true;
duke@0 599 }
duke@0 600 } break;
duke@0 601
duke@0 602 case JVM_CONSTANT_Fieldref:
duke@0 603 case JVM_CONSTANT_InterfaceMethodref:
duke@0 604 case JVM_CONSTANT_Methodref:
duke@0 605 {
duke@0 606 int recur1 = uncached_klass_ref_index_at(index1);
duke@0 607 int recur2 = cp2->uncached_klass_ref_index_at(index2);
duke@0 608 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 609 if (match) {
duke@0 610 recur1 = uncached_name_and_type_ref_index_at(index1);
duke@0 611 recur2 = cp2->uncached_name_and_type_ref_index_at(index2);
duke@0 612 match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 613 if (match) {
duke@0 614 return true;
duke@0 615 }
duke@0 616 }
duke@0 617 } break;
duke@0 618
duke@0 619 case JVM_CONSTANT_Float:
duke@0 620 {
duke@0 621 jfloat f1 = float_at(index1);
duke@0 622 jfloat f2 = cp2->float_at(index2);
duke@0 623 if (f1 == f2) {
duke@0 624 return true;
duke@0 625 }
duke@0 626 } break;
duke@0 627
duke@0 628 case JVM_CONSTANT_Integer:
duke@0 629 {
duke@0 630 jint i1 = int_at(index1);
duke@0 631 jint i2 = cp2->int_at(index2);
duke@0 632 if (i1 == i2) {
duke@0 633 return true;
duke@0 634 }
duke@0 635 } break;
duke@0 636
duke@0 637 case JVM_CONSTANT_Long:
duke@0 638 {
duke@0 639 jlong l1 = long_at(index1);
duke@0 640 jlong l2 = cp2->long_at(index2);
duke@0 641 if (l1 == l2) {
duke@0 642 return true;
duke@0 643 }
duke@0 644 } break;
duke@0 645
duke@0 646 case JVM_CONSTANT_NameAndType:
duke@0 647 {
duke@0 648 int recur1 = name_ref_index_at(index1);
duke@0 649 int recur2 = cp2->name_ref_index_at(index2);
duke@0 650 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 651 if (match) {
duke@0 652 recur1 = signature_ref_index_at(index1);
duke@0 653 recur2 = cp2->signature_ref_index_at(index2);
duke@0 654 match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 655 if (match) {
duke@0 656 return true;
duke@0 657 }
duke@0 658 }
duke@0 659 } break;
duke@0 660
duke@0 661 case JVM_CONSTANT_String:
duke@0 662 {
duke@0 663 oop s1 = string_at(index1, CHECK_false);
duke@0 664 oop s2 = cp2->string_at(index2, CHECK_false);
duke@0 665 if (s1 == s2) {
duke@0 666 return true;
duke@0 667 }
duke@0 668 } break;
duke@0 669
duke@0 670 case JVM_CONSTANT_StringIndex:
duke@0 671 {
duke@0 672 int recur1 = string_index_at(index1);
duke@0 673 int recur2 = cp2->string_index_at(index2);
duke@0 674 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 675 if (match) {
duke@0 676 return true;
duke@0 677 }
duke@0 678 } break;
duke@0 679
duke@0 680 case JVM_CONSTANT_UnresolvedClass:
duke@0 681 {
duke@0 682 symbolOop k1 = unresolved_klass_at(index1);
duke@0 683 symbolOop k2 = cp2->unresolved_klass_at(index2);
duke@0 684 if (k1 == k2) {
duke@0 685 return true;
duke@0 686 }
duke@0 687 } break;
duke@0 688
duke@0 689 case JVM_CONSTANT_UnresolvedString:
duke@0 690 {
duke@0 691 symbolOop s1 = unresolved_string_at(index1);
duke@0 692 symbolOop s2 = cp2->unresolved_string_at(index2);
duke@0 693 if (s1 == s2) {
duke@0 694 return true;
duke@0 695 }
duke@0 696 } break;
duke@0 697
duke@0 698 case JVM_CONSTANT_Utf8:
duke@0 699 {
duke@0 700 symbolOop s1 = symbol_at(index1);
duke@0 701 symbolOop s2 = cp2->symbol_at(index2);
duke@0 702 if (s1 == s2) {
duke@0 703 return true;
duke@0 704 }
duke@0 705 } break;
duke@0 706
duke@0 707 // Invalid is used as the tag for the second constant pool entry
duke@0 708 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should
duke@0 709 // not be seen by itself.
duke@0 710 case JVM_CONSTANT_Invalid: // fall through
duke@0 711
duke@0 712 default:
duke@0 713 ShouldNotReachHere();
duke@0 714 break;
duke@0 715 }
duke@0 716
duke@0 717 return false;
duke@0 718 } // end compare_entry_to()
duke@0 719
duke@0 720
duke@0 721 // Copy this constant pool's entries at start_i to end_i (inclusive)
duke@0 722 // to the constant pool to_cp's entries starting at to_i. A total of
duke@0 723 // (end_i - start_i) + 1 entries are copied.
duke@0 724 void constantPoolOopDesc::copy_cp_to(int start_i, int end_i,
duke@0 725 constantPoolHandle to_cp, int to_i, TRAPS) {
duke@0 726
duke@0 727 int dest_i = to_i; // leave original alone for debug purposes
duke@0 728
duke@0 729 for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) {
duke@0 730 copy_entry_to(src_i, to_cp, dest_i, CHECK);
duke@0 731
duke@0 732 switch (tag_at(src_i).value()) {
duke@0 733 case JVM_CONSTANT_Double:
duke@0 734 case JVM_CONSTANT_Long:
duke@0 735 // double and long take two constant pool entries
duke@0 736 src_i += 2;
duke@0 737 dest_i += 2;
duke@0 738 break;
duke@0 739
duke@0 740 default:
duke@0 741 // all others take one constant pool entry
duke@0 742 src_i++;
duke@0 743 dest_i++;
duke@0 744 break;
duke@0 745 }
duke@0 746 }
duke@0 747 } // end copy_cp_to()
duke@0 748
duke@0 749
duke@0 750 // Copy this constant pool's entry at from_i to the constant pool
duke@0 751 // to_cp's entry at to_i.
duke@0 752 void constantPoolOopDesc::copy_entry_to(int from_i, constantPoolHandle to_cp,
duke@0 753 int to_i, TRAPS) {
duke@0 754
duke@0 755 switch (tag_at(from_i).value()) {
duke@0 756 case JVM_CONSTANT_Class:
duke@0 757 {
duke@0 758 klassOop k = klass_at(from_i, CHECK);
duke@0 759 to_cp->klass_at_put(to_i, k);
duke@0 760 } break;
duke@0 761
duke@0 762 case JVM_CONSTANT_ClassIndex:
duke@0 763 {
duke@0 764 jint ki = klass_index_at(from_i);
duke@0 765 to_cp->klass_index_at_put(to_i, ki);
duke@0 766 } break;
duke@0 767
duke@0 768 case JVM_CONSTANT_Double:
duke@0 769 {
duke@0 770 jdouble d = double_at(from_i);
duke@0 771 to_cp->double_at_put(to_i, d);
duke@0 772 // double takes two constant pool entries so init second entry's tag
duke@0 773 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid);
duke@0 774 } break;
duke@0 775
duke@0 776 case JVM_CONSTANT_Fieldref:
duke@0 777 {
duke@0 778 int class_index = uncached_klass_ref_index_at(from_i);
duke@0 779 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i);
duke@0 780 to_cp->field_at_put(to_i, class_index, name_and_type_index);
duke@0 781 } break;
duke@0 782
duke@0 783 case JVM_CONSTANT_Float:
duke@0 784 {
duke@0 785 jfloat f = float_at(from_i);
duke@0 786 to_cp->float_at_put(to_i, f);
duke@0 787 } break;
duke@0 788
duke@0 789 case JVM_CONSTANT_Integer:
duke@0 790 {
duke@0 791 jint i = int_at(from_i);
duke@0 792 to_cp->int_at_put(to_i, i);
duke@0 793 } break;
duke@0 794
duke@0 795 case JVM_CONSTANT_InterfaceMethodref:
duke@0 796 {
duke@0 797 int class_index = uncached_klass_ref_index_at(from_i);
duke@0 798 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i);
duke@0 799 to_cp->interface_method_at_put(to_i, class_index, name_and_type_index);
duke@0 800 } break;
duke@0 801
duke@0 802 case JVM_CONSTANT_Long:
duke@0 803 {
duke@0 804 jlong l = long_at(from_i);
duke@0 805 to_cp->long_at_put(to_i, l);
duke@0 806 // long takes two constant pool entries so init second entry's tag
duke@0 807 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid);
duke@0 808 } break;
duke@0 809
duke@0 810 case JVM_CONSTANT_Methodref:
duke@0 811 {
duke@0 812 int class_index = uncached_klass_ref_index_at(from_i);
duke@0 813 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i);
duke@0 814 to_cp->method_at_put(to_i, class_index, name_and_type_index);
duke@0 815 } break;
duke@0 816
duke@0 817 case JVM_CONSTANT_NameAndType:
duke@0 818 {
duke@0 819 int name_ref_index = name_ref_index_at(from_i);
duke@0 820 int signature_ref_index = signature_ref_index_at(from_i);
duke@0 821 to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index);
duke@0 822 } break;
duke@0 823
duke@0 824 case JVM_CONSTANT_String:
duke@0 825 {
duke@0 826 oop s = string_at(from_i, CHECK);
duke@0 827 to_cp->string_at_put(to_i, s);
duke@0 828 } break;
duke@0 829
duke@0 830 case JVM_CONSTANT_StringIndex:
duke@0 831 {
duke@0 832 jint si = string_index_at(from_i);
duke@0 833 to_cp->string_index_at_put(to_i, si);
duke@0 834 } break;
duke@0 835
duke@0 836 case JVM_CONSTANT_UnresolvedClass:
duke@0 837 {
duke@0 838 symbolOop k = unresolved_klass_at(from_i);
duke@0 839 to_cp->unresolved_klass_at_put(to_i, k);
duke@0 840 } break;
duke@0 841
duke@0 842 case JVM_CONSTANT_UnresolvedClassInError:
duke@0 843 {
duke@0 844 symbolOop k = unresolved_klass_at(from_i);
duke@0 845 to_cp->unresolved_klass_at_put(to_i, k);
duke@0 846 to_cp->tag_at_put(to_i, JVM_CONSTANT_UnresolvedClassInError);
duke@0 847 } break;
duke@0 848
duke@0 849
duke@0 850 case JVM_CONSTANT_UnresolvedString:
duke@0 851 {
duke@0 852 symbolOop s = unresolved_string_at(from_i);
duke@0 853 to_cp->unresolved_string_at_put(to_i, s);
duke@0 854 } break;
duke@0 855
duke@0 856 case JVM_CONSTANT_Utf8:
duke@0 857 {
duke@0 858 symbolOop s = symbol_at(from_i);
duke@0 859 to_cp->symbol_at_put(to_i, s);
duke@0 860 } break;
duke@0 861
duke@0 862 // Invalid is used as the tag for the second constant pool entry
duke@0 863 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should
duke@0 864 // not be seen by itself.
duke@0 865 case JVM_CONSTANT_Invalid: // fall through
duke@0 866
duke@0 867 default:
duke@0 868 {
duke@0 869 jbyte bad_value = tag_at(from_i).value(); // leave a breadcrumb
duke@0 870 ShouldNotReachHere();
duke@0 871 } break;
duke@0 872 }
duke@0 873 } // end copy_entry_to()
duke@0 874
duke@0 875
duke@0 876 // Search constant pool search_cp for an entry that matches this
duke@0 877 // constant pool's entry at pattern_i. Returns the index of a
duke@0 878 // matching entry or zero (0) if there is no matching entry.
duke@0 879 int constantPoolOopDesc::find_matching_entry(int pattern_i,
duke@0 880 constantPoolHandle search_cp, TRAPS) {
duke@0 881
duke@0 882 // index zero (0) is not used
duke@0 883 for (int i = 1; i < search_cp->length(); i++) {
duke@0 884 bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0);
duke@0 885 if (found) {
duke@0 886 return i;
duke@0 887 }
duke@0 888 }
duke@0 889
duke@0 890 return 0; // entry not found; return unused index zero (0)
duke@0 891 } // end find_matching_entry()
duke@0 892
duke@0 893
duke@0 894 #ifndef PRODUCT
duke@0 895
duke@0 896 const char* constantPoolOopDesc::printable_name_at(int which) {
duke@0 897
duke@0 898 constantTag tag = tag_at(which);
duke@0 899
duke@0 900 if (tag.is_unresolved_string() || tag.is_string()) {
duke@0 901 return string_at_noresolve(which);
duke@0 902 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
duke@0 903 return klass_name_at(which)->as_C_string();
duke@0 904 } else if (tag.is_symbol()) {
duke@0 905 return symbol_at(which)->as_C_string();
duke@0 906 }
duke@0 907 return "";
duke@0 908 }
duke@0 909
duke@0 910 #endif // PRODUCT
duke@0 911
duke@0 912
duke@0 913 // JVMTI GetConstantPool support
duke@0 914
duke@0 915 // For temporary use until code is stable.
duke@0 916 #define DBG(code)
duke@0 917
duke@0 918 static const char* WARN_MSG = "Must not be such entry!";
duke@0 919
duke@0 920 static void print_cpool_bytes(jint cnt, u1 *bytes) {
duke@0 921 jint size = 0;
duke@0 922 u2 idx1, idx2;
duke@0 923
duke@0 924 for (jint idx = 1; idx < cnt; idx++) {
duke@0 925 jint ent_size = 0;
duke@0 926 u1 tag = *bytes++;
duke@0 927 size++; // count tag
duke@0 928
duke@0 929 printf("const #%03d, tag: %02d ", idx, tag);
duke@0 930 switch(tag) {
duke@0 931 case JVM_CONSTANT_Invalid: {
duke@0 932 printf("Invalid");
duke@0 933 break;
duke@0 934 }
duke@0 935 case JVM_CONSTANT_Unicode: {
duke@0 936 printf("Unicode %s", WARN_MSG);
duke@0 937 break;
duke@0 938 }
duke@0 939 case JVM_CONSTANT_Utf8: {
duke@0 940 u2 len = Bytes::get_Java_u2(bytes);
duke@0 941 char str[128];
duke@0 942 if (len > 127) {
duke@0 943 len = 127;
duke@0 944 }
duke@0 945 strncpy(str, (char *) (bytes+2), len);
duke@0 946 str[len] = '\0';
duke@0 947 printf("Utf8 \"%s\"", str);
duke@0 948 ent_size = 2 + len;
duke@0 949 break;
duke@0 950 }
duke@0 951 case JVM_CONSTANT_Integer: {
duke@0 952 u4 val = Bytes::get_Java_u4(bytes);
duke@0 953 printf("int %d", *(int *) &val);
duke@0 954 ent_size = 4;
duke@0 955 break;
duke@0 956 }
duke@0 957 case JVM_CONSTANT_Float: {
duke@0 958 u4 val = Bytes::get_Java_u4(bytes);
duke@0 959 printf("float %5.3ff", *(float *) &val);
duke@0 960 ent_size = 4;
duke@0 961 break;
duke@0 962 }
duke@0 963 case JVM_CONSTANT_Long: {
duke@0 964 u8 val = Bytes::get_Java_u8(bytes);
xlu@513 965 printf("long "INT64_FORMAT, *(jlong *) &val);
duke@0 966 ent_size = 8;
duke@0 967 idx++; // Long takes two cpool slots
duke@0 968 break;
duke@0 969 }
duke@0 970 case JVM_CONSTANT_Double: {
duke@0 971 u8 val = Bytes::get_Java_u8(bytes);
duke@0 972 printf("double %5.3fd", *(jdouble *)&val);
duke@0 973 ent_size = 8;
duke@0 974 idx++; // Double takes two cpool slots
duke@0 975 break;
duke@0 976 }
duke@0 977 case JVM_CONSTANT_Class: {
duke@0 978 idx1 = Bytes::get_Java_u2(bytes);
duke@0 979 printf("class #%03d", idx1);
duke@0 980 ent_size = 2;
duke@0 981 break;
duke@0 982 }
duke@0 983 case JVM_CONSTANT_String: {
duke@0 984 idx1 = Bytes::get_Java_u2(bytes);
duke@0 985 printf("String #%03d", idx1);
duke@0 986 ent_size = 2;
duke@0 987 break;
duke@0 988 }
duke@0 989 case JVM_CONSTANT_Fieldref: {
duke@0 990 idx1 = Bytes::get_Java_u2(bytes);
duke@0 991 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 992 printf("Field #%03d, #%03d", (int) idx1, (int) idx2);
duke@0 993 ent_size = 4;
duke@0 994 break;
duke@0 995 }
duke@0 996 case JVM_CONSTANT_Methodref: {
duke@0 997 idx1 = Bytes::get_Java_u2(bytes);
duke@0 998 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 999 printf("Method #%03d, #%03d", idx1, idx2);
duke@0 1000 ent_size = 4;
duke@0 1001 break;
duke@0 1002 }
duke@0 1003 case JVM_CONSTANT_InterfaceMethodref: {
duke@0 1004 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1005 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 1006 printf("InterfMethod #%03d, #%03d", idx1, idx2);
duke@0 1007 ent_size = 4;
duke@0 1008 break;
duke@0 1009 }
duke@0 1010 case JVM_CONSTANT_NameAndType: {
duke@0 1011 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1012 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 1013 printf("NameAndType #%03d, #%03d", idx1, idx2);
duke@0 1014 ent_size = 4;
duke@0 1015 break;
duke@0 1016 }
duke@0 1017 case JVM_CONSTANT_ClassIndex: {
duke@0 1018 printf("ClassIndex %s", WARN_MSG);
duke@0 1019 break;
duke@0 1020 }
duke@0 1021 case JVM_CONSTANT_UnresolvedClass: {
duke@0 1022 printf("UnresolvedClass: %s", WARN_MSG);
duke@0 1023 break;
duke@0 1024 }
duke@0 1025 case JVM_CONSTANT_UnresolvedClassInError: {
duke@0 1026 printf("UnresolvedClassInErr: %s", WARN_MSG);
duke@0 1027 break;
duke@0 1028 }
duke@0 1029 case JVM_CONSTANT_StringIndex: {
duke@0 1030 printf("StringIndex: %s", WARN_MSG);
duke@0 1031 break;
duke@0 1032 }
duke@0 1033 case JVM_CONSTANT_UnresolvedString: {
duke@0 1034 printf("UnresolvedString: %s", WARN_MSG);
duke@0 1035 break;
duke@0 1036 }
duke@0 1037 }
duke@0 1038 printf(";\n");
duke@0 1039 bytes += ent_size;
duke@0 1040 size += ent_size;
duke@0 1041 }
duke@0 1042 printf("Cpool size: %d\n", size);
duke@0 1043 fflush(0);
duke@0 1044 return;
duke@0 1045 } /* end print_cpool_bytes */
duke@0 1046
duke@0 1047
duke@0 1048 // Returns size of constant pool entry.
duke@0 1049 jint constantPoolOopDesc::cpool_entry_size(jint idx) {
duke@0 1050 switch(tag_at(idx).value()) {
duke@0 1051 case JVM_CONSTANT_Invalid:
duke@0 1052 case JVM_CONSTANT_Unicode:
duke@0 1053 return 1;
duke@0 1054
duke@0 1055 case JVM_CONSTANT_Utf8:
duke@0 1056 return 3 + symbol_at(idx)->utf8_length();
duke@0 1057
duke@0 1058 case JVM_CONSTANT_Class:
duke@0 1059 case JVM_CONSTANT_String:
duke@0 1060 case JVM_CONSTANT_ClassIndex:
duke@0 1061 case JVM_CONSTANT_UnresolvedClass:
duke@0 1062 case JVM_CONSTANT_UnresolvedClassInError:
duke@0 1063 case JVM_CONSTANT_StringIndex:
duke@0 1064 case JVM_CONSTANT_UnresolvedString:
duke@0 1065 return 3;
duke@0 1066
duke@0 1067 case JVM_CONSTANT_Integer:
duke@0 1068 case JVM_CONSTANT_Float:
duke@0 1069 case JVM_CONSTANT_Fieldref:
duke@0 1070 case JVM_CONSTANT_Methodref:
duke@0 1071 case JVM_CONSTANT_InterfaceMethodref:
duke@0 1072 case JVM_CONSTANT_NameAndType:
duke@0 1073 return 5;
duke@0 1074
duke@0 1075 case JVM_CONSTANT_Long:
duke@0 1076 case JVM_CONSTANT_Double:
duke@0 1077 return 9;
duke@0 1078 }
duke@0 1079 assert(false, "cpool_entry_size: Invalid constant pool entry tag");
duke@0 1080 return 1;
duke@0 1081 } /* end cpool_entry_size */
duke@0 1082
duke@0 1083
duke@0 1084 // SymbolHashMap is used to find a constant pool index from a string.
duke@0 1085 // This function fills in SymbolHashMaps, one for utf8s and one for
duke@0 1086 // class names, returns size of the cpool raw bytes.
duke@0 1087 jint constantPoolOopDesc::hash_entries_to(SymbolHashMap *symmap,
duke@0 1088 SymbolHashMap *classmap) {
duke@0 1089 jint size = 0;
duke@0 1090
duke@0 1091 for (u2 idx = 1; idx < length(); idx++) {
duke@0 1092 u2 tag = tag_at(idx).value();
duke@0 1093 size += cpool_entry_size(idx);
duke@0 1094
duke@0 1095 switch(tag) {
duke@0 1096 case JVM_CONSTANT_Utf8: {
duke@0 1097 symbolOop sym = symbol_at(idx);
duke@0 1098 symmap->add_entry(sym, idx);
duke@0 1099 DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx));
duke@0 1100 break;
duke@0 1101 }
duke@0 1102 case JVM_CONSTANT_Class:
duke@0 1103 case JVM_CONSTANT_UnresolvedClass:
duke@0 1104 case JVM_CONSTANT_UnresolvedClassInError: {
duke@0 1105 symbolOop sym = klass_name_at(idx);
duke@0 1106 classmap->add_entry(sym, idx);
duke@0 1107 DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx));
duke@0 1108 break;
duke@0 1109 }
duke@0 1110 case JVM_CONSTANT_Long:
duke@0 1111 case JVM_CONSTANT_Double: {
duke@0 1112 idx++; // Both Long and Double take two cpool slots
duke@0 1113 break;
duke@0 1114 }
duke@0 1115 }
duke@0 1116 }
duke@0 1117 return size;
duke@0 1118 } /* end hash_utf8_entries_to */
duke@0 1119
duke@0 1120
duke@0 1121 // Copy cpool bytes.
duke@0 1122 // Returns:
duke@0 1123 // 0, in case of OutOfMemoryError
duke@0 1124 // -1, in case of internal error
duke@0 1125 // > 0, count of the raw cpool bytes that have been copied
duke@0 1126 int constantPoolOopDesc::copy_cpool_bytes(int cpool_size,
duke@0 1127 SymbolHashMap* tbl,
duke@0 1128 unsigned char *bytes) {
duke@0 1129 u2 idx1, idx2;
duke@0 1130 jint size = 0;
duke@0 1131 jint cnt = length();
duke@0 1132 unsigned char *start_bytes = bytes;
duke@0 1133
duke@0 1134 for (jint idx = 1; idx < cnt; idx++) {
duke@0 1135 u1 tag = tag_at(idx).value();
duke@0 1136 jint ent_size = cpool_entry_size(idx);
duke@0 1137
duke@0 1138 assert(size + ent_size <= cpool_size, "Size mismatch");
duke@0 1139
duke@0 1140 *bytes = tag;
duke@0 1141 DBG(printf("#%03hd tag=%03hd, ", idx, tag));
duke@0 1142 switch(tag) {
duke@0 1143 case JVM_CONSTANT_Invalid: {
duke@0 1144 DBG(printf("JVM_CONSTANT_Invalid"));
duke@0 1145 break;
duke@0 1146 }
duke@0 1147 case JVM_CONSTANT_Unicode: {
duke@0 1148 assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode");
duke@0 1149 DBG(printf("JVM_CONSTANT_Unicode"));
duke@0 1150 break;
duke@0 1151 }
duke@0 1152 case JVM_CONSTANT_Utf8: {
duke@0 1153 symbolOop sym = symbol_at(idx);
duke@0 1154 char* str = sym->as_utf8();
duke@0 1155 // Warning! It's crashing on x86 with len = sym->utf8_length()
duke@0 1156 int len = (int) strlen(str);
duke@0 1157 Bytes::put_Java_u2((address) (bytes+1), (u2) len);
duke@0 1158 for (int i = 0; i < len; i++) {
duke@0 1159 bytes[3+i] = (u1) str[i];
duke@0 1160 }
duke@0 1161 DBG(printf("JVM_CONSTANT_Utf8: %s ", str));
duke@0 1162 break;
duke@0 1163 }
duke@0 1164 case JVM_CONSTANT_Integer: {
duke@0 1165 jint val = int_at(idx);
duke@0 1166 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val);
duke@0 1167 break;
duke@0 1168 }
duke@0 1169 case JVM_CONSTANT_Float: {
duke@0 1170 jfloat val = float_at(idx);
duke@0 1171 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val);
duke@0 1172 break;
duke@0 1173 }
duke@0 1174 case JVM_CONSTANT_Long: {
duke@0 1175 jlong val = long_at(idx);
duke@0 1176 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val);
duke@0 1177 idx++; // Long takes two cpool slots
duke@0 1178 break;
duke@0 1179 }
duke@0 1180 case JVM_CONSTANT_Double: {
duke@0 1181 jdouble val = double_at(idx);
duke@0 1182 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val);
duke@0 1183 idx++; // Double takes two cpool slots
duke@0 1184 break;
duke@0 1185 }
duke@0 1186 case JVM_CONSTANT_Class:
duke@0 1187 case JVM_CONSTANT_UnresolvedClass:
duke@0 1188 case JVM_CONSTANT_UnresolvedClassInError: {
duke@0 1189 *bytes = JVM_CONSTANT_Class;
duke@0 1190 symbolOop sym = klass_name_at(idx);
duke@0 1191 idx1 = tbl->symbol_to_value(sym);
duke@0 1192 assert(idx1 != 0, "Have not found a hashtable entry");
duke@0 1193 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1194 DBG(printf("JVM_CONSTANT_Class: idx=#%03hd, %s", idx1, sym->as_utf8()));
duke@0 1195 break;
duke@0 1196 }
duke@0 1197 case JVM_CONSTANT_String: {
duke@0 1198 unsigned int hash;
duke@0 1199 char *str = string_at_noresolve(idx);
duke@0 1200 symbolOop sym = SymbolTable::lookup_only(str, (int) strlen(str), hash);
duke@0 1201 idx1 = tbl->symbol_to_value(sym);
duke@0 1202 assert(idx1 != 0, "Have not found a hashtable entry");
duke@0 1203 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1204 DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, str));
duke@0 1205 break;
duke@0 1206 }
duke@0 1207 case JVM_CONSTANT_UnresolvedString: {
duke@0 1208 *bytes = JVM_CONSTANT_String;
duke@0 1209 symbolOop sym = unresolved_string_at(idx);
duke@0 1210 idx1 = tbl->symbol_to_value(sym);
duke@0 1211 assert(idx1 != 0, "Have not found a hashtable entry");
duke@0 1212 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1213 DBG(char *str = sym->as_utf8());
duke@0 1214 DBG(printf("JVM_CONSTANT_UnresolvedString: idx=#%03hd, %s", idx1, str));
duke@0 1215 break;
duke@0 1216 }
duke@0 1217 case JVM_CONSTANT_Fieldref:
duke@0 1218 case JVM_CONSTANT_Methodref:
duke@0 1219 case JVM_CONSTANT_InterfaceMethodref: {
duke@0 1220 idx1 = uncached_klass_ref_index_at(idx);
duke@0 1221 idx2 = uncached_name_and_type_ref_index_at(idx);
duke@0 1222 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1223 Bytes::put_Java_u2((address) (bytes+3), idx2);
duke@0 1224 DBG(printf("JVM_CONSTANT_Methodref: %hd %hd", idx1, idx2));
duke@0 1225 break;
duke@0 1226 }
duke@0 1227 case JVM_CONSTANT_NameAndType: {
duke@0 1228 idx1 = name_ref_index_at(idx);
duke@0 1229 idx2 = signature_ref_index_at(idx);
duke@0 1230 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1231 Bytes::put_Java_u2((address) (bytes+3), idx2);
duke@0 1232 DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2));
duke@0 1233 break;
duke@0 1234 }
duke@0 1235 case JVM_CONSTANT_ClassIndex: {
duke@0 1236 *bytes = JVM_CONSTANT_Class;
duke@0 1237 idx1 = klass_index_at(idx);
duke@0 1238 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1239 DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1));
duke@0 1240 break;
duke@0 1241 }
duke@0 1242 case JVM_CONSTANT_StringIndex: {
duke@0 1243 *bytes = JVM_CONSTANT_String;
duke@0 1244 idx1 = string_index_at(idx);
duke@0 1245 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1246 DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1));
duke@0 1247 break;
duke@0 1248 }
duke@0 1249 }
duke@0 1250 DBG(printf("\n"));
duke@0 1251 bytes += ent_size;
duke@0 1252 size += ent_size;
duke@0 1253 }
duke@0 1254 assert(size == cpool_size, "Size mismatch");
duke@0 1255
duke@0 1256 // Keep temorarily for debugging until it's stable.
duke@0 1257 DBG(print_cpool_bytes(cnt, start_bytes));
duke@0 1258 return (int)(bytes - start_bytes);
duke@0 1259 } /* end copy_cpool_bytes */
duke@0 1260
duke@0 1261
duke@0 1262 void SymbolHashMap::add_entry(symbolOop sym, u2 value) {
duke@0 1263 char *str = sym->as_utf8();
duke@0 1264 unsigned int hash = compute_hash(str, sym->utf8_length());
duke@0 1265 unsigned int index = hash % table_size();
duke@0 1266
duke@0 1267 // check if already in map
duke@0 1268 // we prefer the first entry since it is more likely to be what was used in
duke@0 1269 // the class file
duke@0 1270 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) {
duke@0 1271 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@0 1272 if (en->hash() == hash && en->symbol() == sym) {
duke@0 1273 return; // already there
duke@0 1274 }
duke@0 1275 }
duke@0 1276
duke@0 1277 SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value);
duke@0 1278 entry->set_next(bucket(index));
duke@0 1279 _buckets[index].set_entry(entry);
duke@0 1280 assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@0 1281 }
duke@0 1282
duke@0 1283 SymbolHashMapEntry* SymbolHashMap::find_entry(symbolOop sym) {
duke@0 1284 assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL");
duke@0 1285 char *str = sym->as_utf8();
duke@0 1286 int len = sym->utf8_length();
duke@0 1287 unsigned int hash = SymbolHashMap::compute_hash(str, len);
duke@0 1288 unsigned int index = hash % table_size();
duke@0 1289 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) {
duke@0 1290 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@0 1291 if (en->hash() == hash && en->symbol() == sym) {
duke@0 1292 return en;
duke@0 1293 }
duke@0 1294 }
duke@0 1295 return NULL;
duke@0 1296 }