annotate src/share/vm/oops/constantPoolOop.cpp @ 773:47ffceb239d0

6839599: JVM crash while profiling Tomcat and Liferay Summary: constantPoolOopDesc::copy_cpool_bytes() - do the brute-force search search through 'tbl' when SymbolTable::lookup_only() returns NULL Reviewed-by: kamg
author thurka
date Wed, 20 May 2009 09:36:53 +0200
parents be93aad57795
children 389049f3f393
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
jrose@726 252 symbolOop constantPoolOopDesc::impl_name_ref_at(int which, bool uncached) {
jrose@726 253 int name_index = name_ref_index_at(impl_name_and_type_ref_index_at(which, uncached));
duke@0 254 return symbol_at(name_index);
duke@0 255 }
duke@0 256
duke@0 257
jrose@726 258 symbolOop constantPoolOopDesc::impl_signature_ref_at(int which, bool uncached) {
jrose@726 259 int signature_index = signature_ref_index_at(impl_name_and_type_ref_index_at(which, uncached));
duke@0 260 return symbol_at(signature_index);
duke@0 261 }
duke@0 262
duke@0 263
jrose@726 264 int constantPoolOopDesc::impl_name_and_type_ref_index_at(int which, bool uncached) {
jrose@726 265 jint ref_index = field_or_method_at(which, uncached);
duke@0 266 return extract_high_short_from_int(ref_index);
duke@0 267 }
duke@0 268
duke@0 269
jrose@726 270 int constantPoolOopDesc::impl_klass_ref_index_at(int which, bool uncached) {
jrose@726 271 jint ref_index = field_or_method_at(which, uncached);
duke@0 272 return extract_low_short_from_int(ref_index);
duke@0 273 }
duke@0 274
duke@0 275
jrose@726 276
jrose@726 277 int constantPoolOopDesc::map_instruction_operand_to_index(int operand) {
jrose@726 278 if (constantPoolCacheOopDesc::is_secondary_index(operand)) {
jrose@726 279 return cache()->main_entry_at(operand)->constant_pool_index();
jrose@726 280 }
jrose@726 281 assert((int)(u2)operand == operand, "clean u2");
jrose@726 282 int index = Bytes::swap_u2(operand);
jrose@726 283 return cache()->entry_at(index)->constant_pool_index();
jrose@726 284 }
jrose@726 285
jrose@726 286
duke@0 287 void constantPoolOopDesc::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) {
duke@0 288 if (k->oop_is_instance() || k->oop_is_objArray()) {
duke@0 289 instanceKlassHandle holder (THREAD, this_oop->pool_holder());
duke@0 290 klassOop elem_oop = k->oop_is_instance() ? k() : objArrayKlass::cast(k())->bottom_klass();
duke@0 291 KlassHandle element (THREAD, elem_oop);
duke@0 292
duke@0 293 // The element type could be a typeArray - we only need the access check if it is
duke@0 294 // an reference to another class
duke@0 295 if (element->oop_is_instance()) {
duke@0 296 LinkResolver::check_klass_accessability(holder, element, CHECK);
duke@0 297 }
duke@0 298 }
duke@0 299 }
duke@0 300
duke@0 301
jrose@726 302 int constantPoolOopDesc::name_ref_index_at(int which_nt) {
jrose@726 303 jint ref_index = name_and_type_at(which_nt);
duke@0 304 return extract_low_short_from_int(ref_index);
duke@0 305 }
duke@0 306
duke@0 307
jrose@726 308 int constantPoolOopDesc::signature_ref_index_at(int which_nt) {
jrose@726 309 jint ref_index = name_and_type_at(which_nt);
duke@0 310 return extract_high_short_from_int(ref_index);
duke@0 311 }
duke@0 312
duke@0 313
duke@0 314 klassOop constantPoolOopDesc::klass_ref_at(int which, TRAPS) {
duke@0 315 return klass_at(klass_ref_index_at(which), CHECK_NULL);
duke@0 316 }
duke@0 317
duke@0 318
duke@0 319 symbolOop constantPoolOopDesc::klass_name_at(int which) {
duke@0 320 assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(),
duke@0 321 "Corrupted constant pool");
duke@0 322 // A resolved constantPool entry will contain a klassOop, otherwise a symbolOop.
duke@0 323 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and
duke@0 324 // tag is not updated atomicly.
duke@0 325 oop entry = *(obj_at_addr(which));
duke@0 326 if (entry->is_klass()) {
duke@0 327 // Already resolved - return entry's name.
duke@0 328 return klassOop(entry)->klass_part()->name();
duke@0 329 } else {
duke@0 330 assert(entry->is_symbol(), "must be either symbol or klass");
duke@0 331 return (symbolOop)entry;
duke@0 332 }
duke@0 333 }
duke@0 334
duke@0 335 symbolOop constantPoolOopDesc::klass_ref_at_noresolve(int which) {
duke@0 336 jint ref_index = klass_ref_index_at(which);
duke@0 337 return klass_at_noresolve(ref_index);
duke@0 338 }
duke@0 339
duke@0 340 char* constantPoolOopDesc::string_at_noresolve(int which) {
duke@0 341 // Test entry type in case string is resolved while in here.
duke@0 342 oop entry = *(obj_at_addr(which));
duke@0 343 if (entry->is_symbol()) {
duke@0 344 return ((symbolOop)entry)->as_C_string();
jrose@431 345 } else if (java_lang_String::is_instance(entry)) {
jrose@431 346 return java_lang_String::as_utf8_string(entry);
duke@0 347 } else {
jrose@431 348 return (char*)"<pseudo-string>";
duke@0 349 }
duke@0 350 }
duke@0 351
duke@0 352
duke@0 353 BasicType constantPoolOopDesc::basic_type_for_signature_at(int which) {
duke@0 354 return FieldType::basic_type(symbol_at(which));
duke@0 355 }
duke@0 356
duke@0 357
duke@0 358 void constantPoolOopDesc::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) {
duke@0 359 for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused
duke@0 360 if (this_oop->tag_at(index).is_unresolved_string()) {
duke@0 361 this_oop->string_at(index, CHECK);
duke@0 362 }
duke@0 363 }
duke@0 364 }
duke@0 365
duke@0 366 oop constantPoolOopDesc::string_at_impl(constantPoolHandle this_oop, int which, TRAPS) {
duke@0 367 oop entry = *(this_oop->obj_at_addr(which));
duke@0 368 if (entry->is_symbol()) {
duke@0 369 ObjectLocker ol(this_oop, THREAD);
duke@0 370 if (this_oop->tag_at(which).is_unresolved_string()) {
duke@0 371 // Intern string
duke@0 372 symbolOop sym = this_oop->unresolved_string_at(which);
duke@0 373 entry = StringTable::intern(sym, CHECK_(constantPoolOop(NULL)));
duke@0 374 this_oop->string_at_put(which, entry);
duke@0 375 } else {
duke@0 376 // Another thread beat us and interned string, read string from constant pool
duke@0 377 entry = this_oop->resolved_string_at(which);
duke@0 378 }
duke@0 379 }
duke@0 380 assert(java_lang_String::is_instance(entry), "must be string");
duke@0 381 return entry;
duke@0 382 }
duke@0 383
duke@0 384
jrose@431 385 bool constantPoolOopDesc::is_pseudo_string_at(int which) {
jrose@431 386 oop entry = *(obj_at_addr(which));
jrose@431 387 if (entry->is_symbol())
jrose@431 388 // Not yet resolved, but it will resolve to a string.
jrose@431 389 return false;
jrose@431 390 else if (java_lang_String::is_instance(entry))
jrose@431 391 return false; // actually, it might be a non-interned or non-perm string
jrose@431 392 else
jrose@431 393 // truly pseudo
jrose@431 394 return true;
jrose@431 395 }
jrose@431 396
jrose@431 397
duke@0 398 bool constantPoolOopDesc::klass_name_at_matches(instanceKlassHandle k,
duke@0 399 int which) {
duke@0 400 // Names are interned, so we can compare symbolOops directly
duke@0 401 symbolOop cp_name = klass_name_at(which);
duke@0 402 return (cp_name == k->name());
duke@0 403 }
duke@0 404
duke@0 405
duke@0 406 int constantPoolOopDesc::pre_resolve_shared_klasses(TRAPS) {
duke@0 407 ResourceMark rm;
duke@0 408 int count = 0;
duke@0 409 for (int index = 1; index < tags()->length(); index++) { // Index 0 is unused
duke@0 410 if (tag_at(index).is_unresolved_string()) {
duke@0 411 // Intern string
duke@0 412 symbolOop sym = unresolved_string_at(index);
duke@0 413 oop entry = StringTable::intern(sym, CHECK_(-1));
duke@0 414 string_at_put(index, entry);
duke@0 415 }
duke@0 416 }
duke@0 417 return count;
duke@0 418 }
duke@0 419
duke@0 420
duke@0 421 // Iterate over symbols which are used as class, field, method names and
duke@0 422 // signatures (in preparation for writing to the shared archive).
duke@0 423
duke@0 424 void constantPoolOopDesc::shared_symbols_iterate(OopClosure* closure) {
duke@0 425 for (int index = 1; index < length(); index++) { // Index 0 is unused
duke@0 426 switch (tag_at(index).value()) {
duke@0 427
duke@0 428 case JVM_CONSTANT_UnresolvedClass:
duke@0 429 closure->do_oop(obj_at_addr(index));
duke@0 430 break;
duke@0 431
duke@0 432 case JVM_CONSTANT_NameAndType:
duke@0 433 {
duke@0 434 int i = *int_at_addr(index);
duke@0 435 closure->do_oop(obj_at_addr((unsigned)i >> 16));
duke@0 436 closure->do_oop(obj_at_addr((unsigned)i & 0xffff));
duke@0 437 }
duke@0 438 break;
duke@0 439
duke@0 440 case JVM_CONSTANT_Class:
duke@0 441 case JVM_CONSTANT_InterfaceMethodref:
duke@0 442 case JVM_CONSTANT_Fieldref:
duke@0 443 case JVM_CONSTANT_Methodref:
duke@0 444 case JVM_CONSTANT_Integer:
duke@0 445 case JVM_CONSTANT_Float:
duke@0 446 // Do nothing! Not an oop.
duke@0 447 // These constant types do not reference symbols at this point.
duke@0 448 break;
duke@0 449
duke@0 450 case JVM_CONSTANT_String:
duke@0 451 // Do nothing! Not a symbol.
duke@0 452 break;
duke@0 453
duke@0 454 case JVM_CONSTANT_UnresolvedString:
duke@0 455 case JVM_CONSTANT_Utf8:
duke@0 456 // These constants are symbols, but unless these symbols are
duke@0 457 // actually to be used for something, we don't want to mark them.
duke@0 458 break;
duke@0 459
duke@0 460 case JVM_CONSTANT_Long:
duke@0 461 case JVM_CONSTANT_Double:
duke@0 462 // Do nothing! Not an oop. (But takes two pool entries.)
duke@0 463 ++index;
duke@0 464 break;
duke@0 465
duke@0 466 default:
duke@0 467 ShouldNotReachHere();
duke@0 468 break;
duke@0 469 }
duke@0 470 }
duke@0 471 }
duke@0 472
duke@0 473
duke@0 474 // Iterate over the [one] tags array (in preparation for writing to the
duke@0 475 // shared archive).
duke@0 476
duke@0 477 void constantPoolOopDesc::shared_tags_iterate(OopClosure* closure) {
duke@0 478 closure->do_oop(tags_addr());
duke@0 479 }
duke@0 480
duke@0 481
duke@0 482 // Iterate over String objects (in preparation for writing to the shared
duke@0 483 // archive).
duke@0 484
duke@0 485 void constantPoolOopDesc::shared_strings_iterate(OopClosure* closure) {
duke@0 486 for (int index = 1; index < length(); index++) { // Index 0 is unused
duke@0 487 switch (tag_at(index).value()) {
duke@0 488
duke@0 489 case JVM_CONSTANT_UnresolvedClass:
duke@0 490 case JVM_CONSTANT_NameAndType:
duke@0 491 // Do nothing! Not a String.
duke@0 492 break;
duke@0 493
duke@0 494 case JVM_CONSTANT_Class:
duke@0 495 case JVM_CONSTANT_InterfaceMethodref:
duke@0 496 case JVM_CONSTANT_Fieldref:
duke@0 497 case JVM_CONSTANT_Methodref:
duke@0 498 case JVM_CONSTANT_Integer:
duke@0 499 case JVM_CONSTANT_Float:
duke@0 500 // Do nothing! Not an oop.
duke@0 501 // These constant types do not reference symbols at this point.
duke@0 502 break;
duke@0 503
duke@0 504 case JVM_CONSTANT_String:
duke@0 505 closure->do_oop(obj_at_addr(index));
duke@0 506 break;
duke@0 507
duke@0 508 case JVM_CONSTANT_UnresolvedString:
duke@0 509 case JVM_CONSTANT_Utf8:
duke@0 510 // These constants are symbols, but unless these symbols are
duke@0 511 // actually to be used for something, we don't want to mark them.
duke@0 512 break;
duke@0 513
duke@0 514 case JVM_CONSTANT_Long:
duke@0 515 case JVM_CONSTANT_Double:
duke@0 516 // Do nothing! Not an oop. (But takes two pool entries.)
duke@0 517 ++index;
duke@0 518 break;
duke@0 519
duke@0 520 default:
duke@0 521 ShouldNotReachHere();
duke@0 522 break;
duke@0 523 }
duke@0 524 }
duke@0 525 }
duke@0 526
duke@0 527
duke@0 528 // Compare this constant pool's entry at index1 to the constant pool
duke@0 529 // cp2's entry at index2.
duke@0 530 bool constantPoolOopDesc::compare_entry_to(int index1, constantPoolHandle cp2,
duke@0 531 int index2, TRAPS) {
duke@0 532
duke@0 533 jbyte t1 = tag_at(index1).value();
duke@0 534 jbyte t2 = cp2->tag_at(index2).value();
duke@0 535
duke@0 536
duke@0 537 // JVM_CONSTANT_UnresolvedClassInError is equal to JVM_CONSTANT_UnresolvedClass
duke@0 538 // when comparing
duke@0 539 if (t1 == JVM_CONSTANT_UnresolvedClassInError) {
duke@0 540 t1 = JVM_CONSTANT_UnresolvedClass;
duke@0 541 }
duke@0 542 if (t2 == JVM_CONSTANT_UnresolvedClassInError) {
duke@0 543 t2 = JVM_CONSTANT_UnresolvedClass;
duke@0 544 }
duke@0 545
duke@0 546 if (t1 != t2) {
duke@0 547 // Not the same entry type so there is nothing else to check. Note
duke@0 548 // that this style of checking will consider resolved/unresolved
duke@0 549 // class pairs and resolved/unresolved string pairs as different.
duke@0 550 // From the constantPoolOop API point of view, this is correct
duke@0 551 // behavior. See constantPoolKlass::merge() to see how this plays
duke@0 552 // out in the context of constantPoolOop merging.
duke@0 553 return false;
duke@0 554 }
duke@0 555
duke@0 556 switch (t1) {
duke@0 557 case JVM_CONSTANT_Class:
duke@0 558 {
duke@0 559 klassOop k1 = klass_at(index1, CHECK_false);
duke@0 560 klassOop k2 = cp2->klass_at(index2, CHECK_false);
duke@0 561 if (k1 == k2) {
duke@0 562 return true;
duke@0 563 }
duke@0 564 } break;
duke@0 565
duke@0 566 case JVM_CONSTANT_ClassIndex:
duke@0 567 {
duke@0 568 int recur1 = klass_index_at(index1);
duke@0 569 int recur2 = cp2->klass_index_at(index2);
duke@0 570 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 571 if (match) {
duke@0 572 return true;
duke@0 573 }
duke@0 574 } break;
duke@0 575
duke@0 576 case JVM_CONSTANT_Double:
duke@0 577 {
duke@0 578 jdouble d1 = double_at(index1);
duke@0 579 jdouble d2 = cp2->double_at(index2);
duke@0 580 if (d1 == d2) {
duke@0 581 return true;
duke@0 582 }
duke@0 583 } break;
duke@0 584
duke@0 585 case JVM_CONSTANT_Fieldref:
duke@0 586 case JVM_CONSTANT_InterfaceMethodref:
duke@0 587 case JVM_CONSTANT_Methodref:
duke@0 588 {
duke@0 589 int recur1 = uncached_klass_ref_index_at(index1);
duke@0 590 int recur2 = cp2->uncached_klass_ref_index_at(index2);
duke@0 591 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 592 if (match) {
duke@0 593 recur1 = uncached_name_and_type_ref_index_at(index1);
duke@0 594 recur2 = cp2->uncached_name_and_type_ref_index_at(index2);
duke@0 595 match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 596 if (match) {
duke@0 597 return true;
duke@0 598 }
duke@0 599 }
duke@0 600 } break;
duke@0 601
duke@0 602 case JVM_CONSTANT_Float:
duke@0 603 {
duke@0 604 jfloat f1 = float_at(index1);
duke@0 605 jfloat f2 = cp2->float_at(index2);
duke@0 606 if (f1 == f2) {
duke@0 607 return true;
duke@0 608 }
duke@0 609 } break;
duke@0 610
duke@0 611 case JVM_CONSTANT_Integer:
duke@0 612 {
duke@0 613 jint i1 = int_at(index1);
duke@0 614 jint i2 = cp2->int_at(index2);
duke@0 615 if (i1 == i2) {
duke@0 616 return true;
duke@0 617 }
duke@0 618 } break;
duke@0 619
duke@0 620 case JVM_CONSTANT_Long:
duke@0 621 {
duke@0 622 jlong l1 = long_at(index1);
duke@0 623 jlong l2 = cp2->long_at(index2);
duke@0 624 if (l1 == l2) {
duke@0 625 return true;
duke@0 626 }
duke@0 627 } break;
duke@0 628
duke@0 629 case JVM_CONSTANT_NameAndType:
duke@0 630 {
duke@0 631 int recur1 = name_ref_index_at(index1);
duke@0 632 int recur2 = cp2->name_ref_index_at(index2);
duke@0 633 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 634 if (match) {
duke@0 635 recur1 = signature_ref_index_at(index1);
duke@0 636 recur2 = cp2->signature_ref_index_at(index2);
duke@0 637 match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 638 if (match) {
duke@0 639 return true;
duke@0 640 }
duke@0 641 }
duke@0 642 } break;
duke@0 643
duke@0 644 case JVM_CONSTANT_String:
duke@0 645 {
duke@0 646 oop s1 = string_at(index1, CHECK_false);
duke@0 647 oop s2 = cp2->string_at(index2, CHECK_false);
duke@0 648 if (s1 == s2) {
duke@0 649 return true;
duke@0 650 }
duke@0 651 } break;
duke@0 652
duke@0 653 case JVM_CONSTANT_StringIndex:
duke@0 654 {
duke@0 655 int recur1 = string_index_at(index1);
duke@0 656 int recur2 = cp2->string_index_at(index2);
duke@0 657 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 658 if (match) {
duke@0 659 return true;
duke@0 660 }
duke@0 661 } break;
duke@0 662
duke@0 663 case JVM_CONSTANT_UnresolvedClass:
duke@0 664 {
duke@0 665 symbolOop k1 = unresolved_klass_at(index1);
duke@0 666 symbolOop k2 = cp2->unresolved_klass_at(index2);
duke@0 667 if (k1 == k2) {
duke@0 668 return true;
duke@0 669 }
duke@0 670 } break;
duke@0 671
duke@0 672 case JVM_CONSTANT_UnresolvedString:
duke@0 673 {
duke@0 674 symbolOop s1 = unresolved_string_at(index1);
duke@0 675 symbolOop s2 = cp2->unresolved_string_at(index2);
duke@0 676 if (s1 == s2) {
duke@0 677 return true;
duke@0 678 }
duke@0 679 } break;
duke@0 680
duke@0 681 case JVM_CONSTANT_Utf8:
duke@0 682 {
duke@0 683 symbolOop s1 = symbol_at(index1);
duke@0 684 symbolOop s2 = cp2->symbol_at(index2);
duke@0 685 if (s1 == s2) {
duke@0 686 return true;
duke@0 687 }
duke@0 688 } break;
duke@0 689
duke@0 690 // Invalid is used as the tag for the second constant pool entry
duke@0 691 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should
duke@0 692 // not be seen by itself.
duke@0 693 case JVM_CONSTANT_Invalid: // fall through
duke@0 694
duke@0 695 default:
duke@0 696 ShouldNotReachHere();
duke@0 697 break;
duke@0 698 }
duke@0 699
duke@0 700 return false;
duke@0 701 } // end compare_entry_to()
duke@0 702
duke@0 703
duke@0 704 // Copy this constant pool's entries at start_i to end_i (inclusive)
duke@0 705 // to the constant pool to_cp's entries starting at to_i. A total of
duke@0 706 // (end_i - start_i) + 1 entries are copied.
duke@0 707 void constantPoolOopDesc::copy_cp_to(int start_i, int end_i,
duke@0 708 constantPoolHandle to_cp, int to_i, TRAPS) {
duke@0 709
duke@0 710 int dest_i = to_i; // leave original alone for debug purposes
duke@0 711
duke@0 712 for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) {
duke@0 713 copy_entry_to(src_i, to_cp, dest_i, CHECK);
duke@0 714
duke@0 715 switch (tag_at(src_i).value()) {
duke@0 716 case JVM_CONSTANT_Double:
duke@0 717 case JVM_CONSTANT_Long:
duke@0 718 // double and long take two constant pool entries
duke@0 719 src_i += 2;
duke@0 720 dest_i += 2;
duke@0 721 break;
duke@0 722
duke@0 723 default:
duke@0 724 // all others take one constant pool entry
duke@0 725 src_i++;
duke@0 726 dest_i++;
duke@0 727 break;
duke@0 728 }
duke@0 729 }
duke@0 730 } // end copy_cp_to()
duke@0 731
duke@0 732
duke@0 733 // Copy this constant pool's entry at from_i to the constant pool
duke@0 734 // to_cp's entry at to_i.
duke@0 735 void constantPoolOopDesc::copy_entry_to(int from_i, constantPoolHandle to_cp,
duke@0 736 int to_i, TRAPS) {
duke@0 737
duke@0 738 switch (tag_at(from_i).value()) {
duke@0 739 case JVM_CONSTANT_Class:
duke@0 740 {
duke@0 741 klassOop k = klass_at(from_i, CHECK);
duke@0 742 to_cp->klass_at_put(to_i, k);
duke@0 743 } break;
duke@0 744
duke@0 745 case JVM_CONSTANT_ClassIndex:
duke@0 746 {
duke@0 747 jint ki = klass_index_at(from_i);
duke@0 748 to_cp->klass_index_at_put(to_i, ki);
duke@0 749 } break;
duke@0 750
duke@0 751 case JVM_CONSTANT_Double:
duke@0 752 {
duke@0 753 jdouble d = double_at(from_i);
duke@0 754 to_cp->double_at_put(to_i, d);
duke@0 755 // double takes two constant pool entries so init second entry's tag
duke@0 756 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid);
duke@0 757 } break;
duke@0 758
duke@0 759 case JVM_CONSTANT_Fieldref:
duke@0 760 {
duke@0 761 int class_index = uncached_klass_ref_index_at(from_i);
duke@0 762 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i);
duke@0 763 to_cp->field_at_put(to_i, class_index, name_and_type_index);
duke@0 764 } break;
duke@0 765
duke@0 766 case JVM_CONSTANT_Float:
duke@0 767 {
duke@0 768 jfloat f = float_at(from_i);
duke@0 769 to_cp->float_at_put(to_i, f);
duke@0 770 } break;
duke@0 771
duke@0 772 case JVM_CONSTANT_Integer:
duke@0 773 {
duke@0 774 jint i = int_at(from_i);
duke@0 775 to_cp->int_at_put(to_i, i);
duke@0 776 } break;
duke@0 777
duke@0 778 case JVM_CONSTANT_InterfaceMethodref:
duke@0 779 {
duke@0 780 int class_index = uncached_klass_ref_index_at(from_i);
duke@0 781 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i);
duke@0 782 to_cp->interface_method_at_put(to_i, class_index, name_and_type_index);
duke@0 783 } break;
duke@0 784
duke@0 785 case JVM_CONSTANT_Long:
duke@0 786 {
duke@0 787 jlong l = long_at(from_i);
duke@0 788 to_cp->long_at_put(to_i, l);
duke@0 789 // long takes two constant pool entries so init second entry's tag
duke@0 790 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid);
duke@0 791 } break;
duke@0 792
duke@0 793 case JVM_CONSTANT_Methodref:
duke@0 794 {
duke@0 795 int class_index = uncached_klass_ref_index_at(from_i);
duke@0 796 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i);
duke@0 797 to_cp->method_at_put(to_i, class_index, name_and_type_index);
duke@0 798 } break;
duke@0 799
duke@0 800 case JVM_CONSTANT_NameAndType:
duke@0 801 {
duke@0 802 int name_ref_index = name_ref_index_at(from_i);
duke@0 803 int signature_ref_index = signature_ref_index_at(from_i);
duke@0 804 to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index);
duke@0 805 } break;
duke@0 806
duke@0 807 case JVM_CONSTANT_String:
duke@0 808 {
duke@0 809 oop s = string_at(from_i, CHECK);
duke@0 810 to_cp->string_at_put(to_i, s);
duke@0 811 } break;
duke@0 812
duke@0 813 case JVM_CONSTANT_StringIndex:
duke@0 814 {
duke@0 815 jint si = string_index_at(from_i);
duke@0 816 to_cp->string_index_at_put(to_i, si);
duke@0 817 } break;
duke@0 818
duke@0 819 case JVM_CONSTANT_UnresolvedClass:
duke@0 820 {
duke@0 821 symbolOop k = unresolved_klass_at(from_i);
duke@0 822 to_cp->unresolved_klass_at_put(to_i, k);
duke@0 823 } break;
duke@0 824
duke@0 825 case JVM_CONSTANT_UnresolvedClassInError:
duke@0 826 {
duke@0 827 symbolOop k = unresolved_klass_at(from_i);
duke@0 828 to_cp->unresolved_klass_at_put(to_i, k);
duke@0 829 to_cp->tag_at_put(to_i, JVM_CONSTANT_UnresolvedClassInError);
duke@0 830 } break;
duke@0 831
duke@0 832
duke@0 833 case JVM_CONSTANT_UnresolvedString:
duke@0 834 {
duke@0 835 symbolOop s = unresolved_string_at(from_i);
duke@0 836 to_cp->unresolved_string_at_put(to_i, s);
duke@0 837 } break;
duke@0 838
duke@0 839 case JVM_CONSTANT_Utf8:
duke@0 840 {
duke@0 841 symbolOop s = symbol_at(from_i);
duke@0 842 to_cp->symbol_at_put(to_i, s);
duke@0 843 } break;
duke@0 844
duke@0 845 // Invalid is used as the tag for the second constant pool entry
duke@0 846 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should
duke@0 847 // not be seen by itself.
duke@0 848 case JVM_CONSTANT_Invalid: // fall through
duke@0 849
duke@0 850 default:
duke@0 851 {
duke@0 852 jbyte bad_value = tag_at(from_i).value(); // leave a breadcrumb
duke@0 853 ShouldNotReachHere();
duke@0 854 } break;
duke@0 855 }
duke@0 856 } // end copy_entry_to()
duke@0 857
duke@0 858
duke@0 859 // Search constant pool search_cp for an entry that matches this
duke@0 860 // constant pool's entry at pattern_i. Returns the index of a
duke@0 861 // matching entry or zero (0) if there is no matching entry.
duke@0 862 int constantPoolOopDesc::find_matching_entry(int pattern_i,
duke@0 863 constantPoolHandle search_cp, TRAPS) {
duke@0 864
duke@0 865 // index zero (0) is not used
duke@0 866 for (int i = 1; i < search_cp->length(); i++) {
duke@0 867 bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0);
duke@0 868 if (found) {
duke@0 869 return i;
duke@0 870 }
duke@0 871 }
duke@0 872
duke@0 873 return 0; // entry not found; return unused index zero (0)
duke@0 874 } // end find_matching_entry()
duke@0 875
duke@0 876
duke@0 877 #ifndef PRODUCT
duke@0 878
duke@0 879 const char* constantPoolOopDesc::printable_name_at(int which) {
duke@0 880
duke@0 881 constantTag tag = tag_at(which);
duke@0 882
duke@0 883 if (tag.is_unresolved_string() || tag.is_string()) {
duke@0 884 return string_at_noresolve(which);
duke@0 885 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
duke@0 886 return klass_name_at(which)->as_C_string();
duke@0 887 } else if (tag.is_symbol()) {
duke@0 888 return symbol_at(which)->as_C_string();
duke@0 889 }
duke@0 890 return "";
duke@0 891 }
duke@0 892
duke@0 893 #endif // PRODUCT
duke@0 894
duke@0 895
duke@0 896 // JVMTI GetConstantPool support
duke@0 897
duke@0 898 // For temporary use until code is stable.
duke@0 899 #define DBG(code)
duke@0 900
duke@0 901 static const char* WARN_MSG = "Must not be such entry!";
duke@0 902
duke@0 903 static void print_cpool_bytes(jint cnt, u1 *bytes) {
duke@0 904 jint size = 0;
duke@0 905 u2 idx1, idx2;
duke@0 906
duke@0 907 for (jint idx = 1; idx < cnt; idx++) {
duke@0 908 jint ent_size = 0;
duke@0 909 u1 tag = *bytes++;
duke@0 910 size++; // count tag
duke@0 911
duke@0 912 printf("const #%03d, tag: %02d ", idx, tag);
duke@0 913 switch(tag) {
duke@0 914 case JVM_CONSTANT_Invalid: {
duke@0 915 printf("Invalid");
duke@0 916 break;
duke@0 917 }
duke@0 918 case JVM_CONSTANT_Unicode: {
duke@0 919 printf("Unicode %s", WARN_MSG);
duke@0 920 break;
duke@0 921 }
duke@0 922 case JVM_CONSTANT_Utf8: {
duke@0 923 u2 len = Bytes::get_Java_u2(bytes);
duke@0 924 char str[128];
duke@0 925 if (len > 127) {
duke@0 926 len = 127;
duke@0 927 }
duke@0 928 strncpy(str, (char *) (bytes+2), len);
duke@0 929 str[len] = '\0';
duke@0 930 printf("Utf8 \"%s\"", str);
duke@0 931 ent_size = 2 + len;
duke@0 932 break;
duke@0 933 }
duke@0 934 case JVM_CONSTANT_Integer: {
duke@0 935 u4 val = Bytes::get_Java_u4(bytes);
duke@0 936 printf("int %d", *(int *) &val);
duke@0 937 ent_size = 4;
duke@0 938 break;
duke@0 939 }
duke@0 940 case JVM_CONSTANT_Float: {
duke@0 941 u4 val = Bytes::get_Java_u4(bytes);
duke@0 942 printf("float %5.3ff", *(float *) &val);
duke@0 943 ent_size = 4;
duke@0 944 break;
duke@0 945 }
duke@0 946 case JVM_CONSTANT_Long: {
duke@0 947 u8 val = Bytes::get_Java_u8(bytes);
xlu@513 948 printf("long "INT64_FORMAT, *(jlong *) &val);
duke@0 949 ent_size = 8;
duke@0 950 idx++; // Long takes two cpool slots
duke@0 951 break;
duke@0 952 }
duke@0 953 case JVM_CONSTANT_Double: {
duke@0 954 u8 val = Bytes::get_Java_u8(bytes);
duke@0 955 printf("double %5.3fd", *(jdouble *)&val);
duke@0 956 ent_size = 8;
duke@0 957 idx++; // Double takes two cpool slots
duke@0 958 break;
duke@0 959 }
duke@0 960 case JVM_CONSTANT_Class: {
duke@0 961 idx1 = Bytes::get_Java_u2(bytes);
duke@0 962 printf("class #%03d", idx1);
duke@0 963 ent_size = 2;
duke@0 964 break;
duke@0 965 }
duke@0 966 case JVM_CONSTANT_String: {
duke@0 967 idx1 = Bytes::get_Java_u2(bytes);
duke@0 968 printf("String #%03d", idx1);
duke@0 969 ent_size = 2;
duke@0 970 break;
duke@0 971 }
duke@0 972 case JVM_CONSTANT_Fieldref: {
duke@0 973 idx1 = Bytes::get_Java_u2(bytes);
duke@0 974 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 975 printf("Field #%03d, #%03d", (int) idx1, (int) idx2);
duke@0 976 ent_size = 4;
duke@0 977 break;
duke@0 978 }
duke@0 979 case JVM_CONSTANT_Methodref: {
duke@0 980 idx1 = Bytes::get_Java_u2(bytes);
duke@0 981 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 982 printf("Method #%03d, #%03d", idx1, idx2);
duke@0 983 ent_size = 4;
duke@0 984 break;
duke@0 985 }
duke@0 986 case JVM_CONSTANT_InterfaceMethodref: {
duke@0 987 idx1 = Bytes::get_Java_u2(bytes);
duke@0 988 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 989 printf("InterfMethod #%03d, #%03d", idx1, idx2);
duke@0 990 ent_size = 4;
duke@0 991 break;
duke@0 992 }
duke@0 993 case JVM_CONSTANT_NameAndType: {
duke@0 994 idx1 = Bytes::get_Java_u2(bytes);
duke@0 995 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 996 printf("NameAndType #%03d, #%03d", idx1, idx2);
duke@0 997 ent_size = 4;
duke@0 998 break;
duke@0 999 }
duke@0 1000 case JVM_CONSTANT_ClassIndex: {
duke@0 1001 printf("ClassIndex %s", WARN_MSG);
duke@0 1002 break;
duke@0 1003 }
duke@0 1004 case JVM_CONSTANT_UnresolvedClass: {
duke@0 1005 printf("UnresolvedClass: %s", WARN_MSG);
duke@0 1006 break;
duke@0 1007 }
duke@0 1008 case JVM_CONSTANT_UnresolvedClassInError: {
duke@0 1009 printf("UnresolvedClassInErr: %s", WARN_MSG);
duke@0 1010 break;
duke@0 1011 }
duke@0 1012 case JVM_CONSTANT_StringIndex: {
duke@0 1013 printf("StringIndex: %s", WARN_MSG);
duke@0 1014 break;
duke@0 1015 }
duke@0 1016 case JVM_CONSTANT_UnresolvedString: {
duke@0 1017 printf("UnresolvedString: %s", WARN_MSG);
duke@0 1018 break;
duke@0 1019 }
duke@0 1020 }
duke@0 1021 printf(";\n");
duke@0 1022 bytes += ent_size;
duke@0 1023 size += ent_size;
duke@0 1024 }
duke@0 1025 printf("Cpool size: %d\n", size);
duke@0 1026 fflush(0);
duke@0 1027 return;
duke@0 1028 } /* end print_cpool_bytes */
duke@0 1029
duke@0 1030
duke@0 1031 // Returns size of constant pool entry.
duke@0 1032 jint constantPoolOopDesc::cpool_entry_size(jint idx) {
duke@0 1033 switch(tag_at(idx).value()) {
duke@0 1034 case JVM_CONSTANT_Invalid:
duke@0 1035 case JVM_CONSTANT_Unicode:
duke@0 1036 return 1;
duke@0 1037
duke@0 1038 case JVM_CONSTANT_Utf8:
duke@0 1039 return 3 + symbol_at(idx)->utf8_length();
duke@0 1040
duke@0 1041 case JVM_CONSTANT_Class:
duke@0 1042 case JVM_CONSTANT_String:
duke@0 1043 case JVM_CONSTANT_ClassIndex:
duke@0 1044 case JVM_CONSTANT_UnresolvedClass:
duke@0 1045 case JVM_CONSTANT_UnresolvedClassInError:
duke@0 1046 case JVM_CONSTANT_StringIndex:
duke@0 1047 case JVM_CONSTANT_UnresolvedString:
duke@0 1048 return 3;
duke@0 1049
duke@0 1050 case JVM_CONSTANT_Integer:
duke@0 1051 case JVM_CONSTANT_Float:
duke@0 1052 case JVM_CONSTANT_Fieldref:
duke@0 1053 case JVM_CONSTANT_Methodref:
duke@0 1054 case JVM_CONSTANT_InterfaceMethodref:
duke@0 1055 case JVM_CONSTANT_NameAndType:
duke@0 1056 return 5;
duke@0 1057
duke@0 1058 case JVM_CONSTANT_Long:
duke@0 1059 case JVM_CONSTANT_Double:
duke@0 1060 return 9;
duke@0 1061 }
duke@0 1062 assert(false, "cpool_entry_size: Invalid constant pool entry tag");
duke@0 1063 return 1;
duke@0 1064 } /* end cpool_entry_size */
duke@0 1065
duke@0 1066
duke@0 1067 // SymbolHashMap is used to find a constant pool index from a string.
duke@0 1068 // This function fills in SymbolHashMaps, one for utf8s and one for
duke@0 1069 // class names, returns size of the cpool raw bytes.
duke@0 1070 jint constantPoolOopDesc::hash_entries_to(SymbolHashMap *symmap,
duke@0 1071 SymbolHashMap *classmap) {
duke@0 1072 jint size = 0;
duke@0 1073
duke@0 1074 for (u2 idx = 1; idx < length(); idx++) {
duke@0 1075 u2 tag = tag_at(idx).value();
duke@0 1076 size += cpool_entry_size(idx);
duke@0 1077
duke@0 1078 switch(tag) {
duke@0 1079 case JVM_CONSTANT_Utf8: {
duke@0 1080 symbolOop sym = symbol_at(idx);
duke@0 1081 symmap->add_entry(sym, idx);
duke@0 1082 DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx));
duke@0 1083 break;
duke@0 1084 }
duke@0 1085 case JVM_CONSTANT_Class:
duke@0 1086 case JVM_CONSTANT_UnresolvedClass:
duke@0 1087 case JVM_CONSTANT_UnresolvedClassInError: {
duke@0 1088 symbolOop sym = klass_name_at(idx);
duke@0 1089 classmap->add_entry(sym, idx);
duke@0 1090 DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx));
duke@0 1091 break;
duke@0 1092 }
duke@0 1093 case JVM_CONSTANT_Long:
duke@0 1094 case JVM_CONSTANT_Double: {
duke@0 1095 idx++; // Both Long and Double take two cpool slots
duke@0 1096 break;
duke@0 1097 }
duke@0 1098 }
duke@0 1099 }
duke@0 1100 return size;
duke@0 1101 } /* end hash_utf8_entries_to */
duke@0 1102
duke@0 1103
duke@0 1104 // Copy cpool bytes.
duke@0 1105 // Returns:
duke@0 1106 // 0, in case of OutOfMemoryError
duke@0 1107 // -1, in case of internal error
duke@0 1108 // > 0, count of the raw cpool bytes that have been copied
duke@0 1109 int constantPoolOopDesc::copy_cpool_bytes(int cpool_size,
duke@0 1110 SymbolHashMap* tbl,
duke@0 1111 unsigned char *bytes) {
duke@0 1112 u2 idx1, idx2;
duke@0 1113 jint size = 0;
duke@0 1114 jint cnt = length();
duke@0 1115 unsigned char *start_bytes = bytes;
duke@0 1116
duke@0 1117 for (jint idx = 1; idx < cnt; idx++) {
duke@0 1118 u1 tag = tag_at(idx).value();
duke@0 1119 jint ent_size = cpool_entry_size(idx);
duke@0 1120
duke@0 1121 assert(size + ent_size <= cpool_size, "Size mismatch");
duke@0 1122
duke@0 1123 *bytes = tag;
duke@0 1124 DBG(printf("#%03hd tag=%03hd, ", idx, tag));
duke@0 1125 switch(tag) {
duke@0 1126 case JVM_CONSTANT_Invalid: {
duke@0 1127 DBG(printf("JVM_CONSTANT_Invalid"));
duke@0 1128 break;
duke@0 1129 }
duke@0 1130 case JVM_CONSTANT_Unicode: {
duke@0 1131 assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode");
duke@0 1132 DBG(printf("JVM_CONSTANT_Unicode"));
duke@0 1133 break;
duke@0 1134 }
duke@0 1135 case JVM_CONSTANT_Utf8: {
duke@0 1136 symbolOop sym = symbol_at(idx);
duke@0 1137 char* str = sym->as_utf8();
duke@0 1138 // Warning! It's crashing on x86 with len = sym->utf8_length()
duke@0 1139 int len = (int) strlen(str);
duke@0 1140 Bytes::put_Java_u2((address) (bytes+1), (u2) len);
duke@0 1141 for (int i = 0; i < len; i++) {
duke@0 1142 bytes[3+i] = (u1) str[i];
duke@0 1143 }
duke@0 1144 DBG(printf("JVM_CONSTANT_Utf8: %s ", str));
duke@0 1145 break;
duke@0 1146 }
duke@0 1147 case JVM_CONSTANT_Integer: {
duke@0 1148 jint val = int_at(idx);
duke@0 1149 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val);
duke@0 1150 break;
duke@0 1151 }
duke@0 1152 case JVM_CONSTANT_Float: {
duke@0 1153 jfloat val = float_at(idx);
duke@0 1154 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val);
duke@0 1155 break;
duke@0 1156 }
duke@0 1157 case JVM_CONSTANT_Long: {
duke@0 1158 jlong val = long_at(idx);
duke@0 1159 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val);
duke@0 1160 idx++; // Long takes two cpool slots
duke@0 1161 break;
duke@0 1162 }
duke@0 1163 case JVM_CONSTANT_Double: {
duke@0 1164 jdouble val = double_at(idx);
duke@0 1165 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val);
duke@0 1166 idx++; // Double takes two cpool slots
duke@0 1167 break;
duke@0 1168 }
duke@0 1169 case JVM_CONSTANT_Class:
duke@0 1170 case JVM_CONSTANT_UnresolvedClass:
duke@0 1171 case JVM_CONSTANT_UnresolvedClassInError: {
duke@0 1172 *bytes = JVM_CONSTANT_Class;
duke@0 1173 symbolOop sym = klass_name_at(idx);
duke@0 1174 idx1 = tbl->symbol_to_value(sym);
duke@0 1175 assert(idx1 != 0, "Have not found a hashtable entry");
duke@0 1176 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1177 DBG(printf("JVM_CONSTANT_Class: idx=#%03hd, %s", idx1, sym->as_utf8()));
duke@0 1178 break;
duke@0 1179 }
duke@0 1180 case JVM_CONSTANT_String: {
duke@0 1181 unsigned int hash;
duke@0 1182 char *str = string_at_noresolve(idx);
duke@0 1183 symbolOop sym = SymbolTable::lookup_only(str, (int) strlen(str), hash);
thurka@773 1184 if (sym == NULL) {
thurka@773 1185 // sym can be NULL if string refers to incorrectly encoded JVM_CONSTANT_Utf8
thurka@773 1186 // this can happen with JVM TI; see CR 6839599 for more details
thurka@773 1187 oop string = *(obj_at_addr(idx));
thurka@773 1188 assert(java_lang_String::is_instance(string),"Not a String");
thurka@773 1189 DBG(printf("Error #%03hd tag=%03hd\n", idx, tag));
thurka@773 1190 idx1 = 0;
thurka@773 1191 for (int j = 0; j < tbl->table_size() && idx1 == 0; j++) {
thurka@773 1192 for (SymbolHashMapEntry* cur = tbl->bucket(j); cur != NULL; cur = cur->next()) {
thurka@773 1193 int length;
thurka@773 1194 sym = cur->symbol();
thurka@773 1195 jchar* chars = sym->as_unicode(length);
thurka@773 1196 if (java_lang_String::equals(string, chars, length)) {
thurka@773 1197 idx1 = cur->value();
thurka@773 1198 DBG(printf("Index found: %d\n",idx1));
thurka@773 1199 break;
thurka@773 1200 }
thurka@773 1201 }
thurka@773 1202 }
thurka@773 1203 } else {
thurka@773 1204 idx1 = tbl->symbol_to_value(sym);
thurka@773 1205 }
duke@0 1206 assert(idx1 != 0, "Have not found a hashtable entry");
duke@0 1207 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1208 DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, str));
duke@0 1209 break;
duke@0 1210 }
duke@0 1211 case JVM_CONSTANT_UnresolvedString: {
duke@0 1212 *bytes = JVM_CONSTANT_String;
duke@0 1213 symbolOop sym = unresolved_string_at(idx);
duke@0 1214 idx1 = tbl->symbol_to_value(sym);
duke@0 1215 assert(idx1 != 0, "Have not found a hashtable entry");
duke@0 1216 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1217 DBG(char *str = sym->as_utf8());
duke@0 1218 DBG(printf("JVM_CONSTANT_UnresolvedString: idx=#%03hd, %s", idx1, str));
duke@0 1219 break;
duke@0 1220 }
duke@0 1221 case JVM_CONSTANT_Fieldref:
duke@0 1222 case JVM_CONSTANT_Methodref:
duke@0 1223 case JVM_CONSTANT_InterfaceMethodref: {
duke@0 1224 idx1 = uncached_klass_ref_index_at(idx);
duke@0 1225 idx2 = uncached_name_and_type_ref_index_at(idx);
duke@0 1226 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1227 Bytes::put_Java_u2((address) (bytes+3), idx2);
duke@0 1228 DBG(printf("JVM_CONSTANT_Methodref: %hd %hd", idx1, idx2));
duke@0 1229 break;
duke@0 1230 }
duke@0 1231 case JVM_CONSTANT_NameAndType: {
duke@0 1232 idx1 = name_ref_index_at(idx);
duke@0 1233 idx2 = signature_ref_index_at(idx);
duke@0 1234 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1235 Bytes::put_Java_u2((address) (bytes+3), idx2);
duke@0 1236 DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2));
duke@0 1237 break;
duke@0 1238 }
duke@0 1239 case JVM_CONSTANT_ClassIndex: {
duke@0 1240 *bytes = JVM_CONSTANT_Class;
duke@0 1241 idx1 = klass_index_at(idx);
duke@0 1242 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1243 DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1));
duke@0 1244 break;
duke@0 1245 }
duke@0 1246 case JVM_CONSTANT_StringIndex: {
duke@0 1247 *bytes = JVM_CONSTANT_String;
duke@0 1248 idx1 = string_index_at(idx);
duke@0 1249 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1250 DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1));
duke@0 1251 break;
duke@0 1252 }
duke@0 1253 }
duke@0 1254 DBG(printf("\n"));
duke@0 1255 bytes += ent_size;
duke@0 1256 size += ent_size;
duke@0 1257 }
duke@0 1258 assert(size == cpool_size, "Size mismatch");
duke@0 1259
duke@0 1260 // Keep temorarily for debugging until it's stable.
duke@0 1261 DBG(print_cpool_bytes(cnt, start_bytes));
duke@0 1262 return (int)(bytes - start_bytes);
duke@0 1263 } /* end copy_cpool_bytes */
duke@0 1264
duke@0 1265
duke@0 1266 void SymbolHashMap::add_entry(symbolOop sym, u2 value) {
duke@0 1267 char *str = sym->as_utf8();
duke@0 1268 unsigned int hash = compute_hash(str, sym->utf8_length());
duke@0 1269 unsigned int index = hash % table_size();
duke@0 1270
duke@0 1271 // check if already in map
duke@0 1272 // we prefer the first entry since it is more likely to be what was used in
duke@0 1273 // the class file
duke@0 1274 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) {
duke@0 1275 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@0 1276 if (en->hash() == hash && en->symbol() == sym) {
duke@0 1277 return; // already there
duke@0 1278 }
duke@0 1279 }
duke@0 1280
duke@0 1281 SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value);
duke@0 1282 entry->set_next(bucket(index));
duke@0 1283 _buckets[index].set_entry(entry);
duke@0 1284 assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@0 1285 }
duke@0 1286
duke@0 1287 SymbolHashMapEntry* SymbolHashMap::find_entry(symbolOop sym) {
duke@0 1288 assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL");
duke@0 1289 char *str = sym->as_utf8();
duke@0 1290 int len = sym->utf8_length();
duke@0 1291 unsigned int hash = SymbolHashMap::compute_hash(str, len);
duke@0 1292 unsigned int index = hash % table_size();
duke@0 1293 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) {
duke@0 1294 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@0 1295 if (en->hash() == hash && en->symbol() == sym) {
duke@0 1296 return en;
duke@0 1297 }
duke@0 1298 }
duke@0 1299 return NULL;
duke@0 1300 }