Mercurial > hg > truffle
annotate src/share/vm/oops/constantPoolOop.cpp @ 516:fc7ab6287598
Merge
| author | coleenp |
|---|---|
| date | Fri, 09 Jan 2009 14:39:07 -0500 |
| parents | 2328d1d3f8cf ad8c8ca4ab0f |
| children | 0fbdb4381b99 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 470 | 2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_constantPoolOop.cpp.incl" | |
| 27 | |
|
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28 void constantPoolOopDesc::set_flag_at(FlagBit fb) { |
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29 const int MAX_STATE_CHANGES = 2; |
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30 for (int i = MAX_STATE_CHANGES + 10; i > 0; i--) { |
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31 int oflags = _flags; |
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32 int nflags = oflags | (1 << (int)fb); |
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33 if (Atomic::cmpxchg(nflags, &_flags, oflags) == oflags) |
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34 return; |
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35 } |
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36 assert(false, "failed to cmpxchg flags"); |
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37 _flags |= (1 << (int)fb); // better than nothing |
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38 } |
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39 |
| 0 | 40 klassOop constantPoolOopDesc::klass_at_impl(constantPoolHandle this_oop, int which, TRAPS) { |
| 41 // A resolved constantPool entry will contain a klassOop, otherwise a symbolOop. | |
| 42 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and | |
| 43 // tag is not updated atomicly. | |
| 44 oop entry = *(this_oop->obj_at_addr(which)); | |
| 45 if (entry->is_klass()) { | |
| 46 // Already resolved - return entry. | |
| 47 return (klassOop)entry; | |
| 48 } | |
| 49 | |
| 50 // Acquire lock on constant oop while doing update. After we get the lock, we check if another object | |
| 51 // already has updated the object | |
| 52 assert(THREAD->is_Java_thread(), "must be a Java thread"); | |
| 53 bool do_resolve = false; | |
| 54 bool in_error = false; | |
| 55 | |
| 56 symbolHandle name; | |
| 57 Handle loader; | |
| 58 { ObjectLocker ol(this_oop, THREAD); | |
| 59 | |
| 60 if (this_oop->tag_at(which).is_unresolved_klass()) { | |
| 61 if (this_oop->tag_at(which).is_unresolved_klass_in_error()) { | |
| 62 in_error = true; | |
| 63 } else { | |
| 64 do_resolve = true; | |
| 65 name = symbolHandle(THREAD, this_oop->unresolved_klass_at(which)); | |
| 66 loader = Handle(THREAD, instanceKlass::cast(this_oop->pool_holder())->class_loader()); | |
| 67 } | |
| 68 } | |
| 69 } // unlocking constantPool | |
| 70 | |
| 71 | |
| 72 // The original attempt to resolve this constant pool entry failed so find the | |
| 73 // original error and throw it again (JVMS 5.4.3). | |
| 74 if (in_error) { | |
| 75 symbolOop error = SystemDictionary::find_resolution_error(this_oop, which); | |
| 76 guarantee(error != (symbolOop)NULL, "tag mismatch with resolution error table"); | |
| 77 ResourceMark rm; | |
| 78 // exception text will be the class name | |
| 79 const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); | |
| 80 THROW_MSG_0(error, className); | |
| 81 } | |
| 82 | |
| 83 if (do_resolve) { | |
| 84 // this_oop must be unlocked during resolve_or_fail | |
| 85 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); | |
| 86 Handle h_prot (THREAD, protection_domain); | |
| 87 klassOop k_oop = SystemDictionary::resolve_or_fail(name, loader, h_prot, true, THREAD); | |
| 88 KlassHandle k; | |
| 89 if (!HAS_PENDING_EXCEPTION) { | |
| 90 k = KlassHandle(THREAD, k_oop); | |
| 91 // Do access check for klasses | |
| 92 verify_constant_pool_resolve(this_oop, k, THREAD); | |
| 93 } | |
| 94 | |
| 95 // Failed to resolve class. We must record the errors so that subsequent attempts | |
| 96 // to resolve this constant pool entry fail with the same error (JVMS 5.4.3). | |
| 97 if (HAS_PENDING_EXCEPTION) { | |
| 98 ResourceMark rm; | |
| 99 symbolHandle error(PENDING_EXCEPTION->klass()->klass_part()->name()); | |
| 100 | |
| 101 bool throw_orig_error = false; | |
| 102 { | |
| 103 ObjectLocker ol (this_oop, THREAD); | |
| 104 | |
| 105 // some other thread has beaten us and has resolved the class. | |
| 106 if (this_oop->tag_at(which).is_klass()) { | |
| 107 CLEAR_PENDING_EXCEPTION; | |
| 108 entry = this_oop->resolved_klass_at(which); | |
| 109 return (klassOop)entry; | |
| 110 } | |
| 111 | |
| 112 if (!PENDING_EXCEPTION-> | |
| 113 is_a(SystemDictionary::linkageError_klass())) { | |
| 114 // Just throw the exception and don't prevent these classes from | |
| 115 // being loaded due to virtual machine errors like StackOverflow | |
| 116 // and OutOfMemoryError, etc, or if the thread was hit by stop() | |
| 117 // Needs clarification to section 5.4.3 of the VM spec (see 6308271) | |
| 118 } | |
| 119 else if (!this_oop->tag_at(which).is_unresolved_klass_in_error()) { | |
| 120 SystemDictionary::add_resolution_error(this_oop, which, error); | |
| 121 this_oop->tag_at_put(which, JVM_CONSTANT_UnresolvedClassInError); | |
| 122 } else { | |
| 123 // some other thread has put the class in error state. | |
| 124 error = symbolHandle(SystemDictionary::find_resolution_error(this_oop, which)); | |
| 125 assert(!error.is_null(), "checking"); | |
| 126 throw_orig_error = true; | |
| 127 } | |
| 128 } // unlocked | |
| 129 | |
| 130 if (throw_orig_error) { | |
| 131 CLEAR_PENDING_EXCEPTION; | |
| 132 ResourceMark rm; | |
| 133 const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); | |
| 134 THROW_MSG_0(error, className); | |
| 135 } | |
| 136 | |
| 137 return 0; | |
| 138 } | |
| 139 | |
| 140 if (TraceClassResolution && !k()->klass_part()->oop_is_array()) { | |
| 141 // skip resolving the constant pool so that this code get's | |
| 142 // called the next time some bytecodes refer to this class. | |
| 143 ResourceMark rm; | |
| 144 int line_number = -1; | |
| 145 const char * source_file = NULL; | |
| 146 if (JavaThread::current()->has_last_Java_frame()) { | |
| 147 // try to identify the method which called this function. | |
| 148 vframeStream vfst(JavaThread::current()); | |
| 149 if (!vfst.at_end()) { | |
| 150 line_number = vfst.method()->line_number_from_bci(vfst.bci()); | |
| 151 symbolOop s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name(); | |
| 152 if (s != NULL) { | |
| 153 source_file = s->as_C_string(); | |
| 154 } | |
| 155 } | |
| 156 } | |
| 157 if (k() != this_oop->pool_holder()) { | |
| 158 // only print something if the classes are different | |
| 159 if (source_file != NULL) { | |
| 160 tty->print("RESOLVE %s %s %s:%d\n", | |
| 161 instanceKlass::cast(this_oop->pool_holder())->external_name(), | |
| 162 instanceKlass::cast(k())->external_name(), source_file, line_number); | |
| 163 } else { | |
| 164 tty->print("RESOLVE %s %s\n", | |
| 165 instanceKlass::cast(this_oop->pool_holder())->external_name(), | |
| 166 instanceKlass::cast(k())->external_name()); | |
| 167 } | |
| 168 } | |
| 169 return k(); | |
| 170 } else { | |
| 171 ObjectLocker ol (this_oop, THREAD); | |
| 172 // Only updated constant pool - if it is resolved. | |
| 173 do_resolve = this_oop->tag_at(which).is_unresolved_klass(); | |
| 174 if (do_resolve) { | |
| 175 this_oop->klass_at_put(which, k()); | |
| 176 } | |
| 177 } | |
| 178 } | |
| 179 | |
| 180 entry = this_oop->resolved_klass_at(which); | |
| 181 assert(entry->is_klass(), "must be resolved at this point"); | |
| 182 return (klassOop)entry; | |
| 183 } | |
| 184 | |
| 185 | |
| 186 // Does not update constantPoolOop - to avoid any exception throwing. Used | |
| 187 // by compiler and exception handling. Also used to avoid classloads for | |
| 188 // instanceof operations. Returns NULL if the class has not been loaded or | |
| 189 // if the verification of constant pool failed | |
| 190 klassOop constantPoolOopDesc::klass_at_if_loaded(constantPoolHandle this_oop, int which) { | |
| 191 oop entry = *this_oop->obj_at_addr(which); | |
| 192 if (entry->is_klass()) { | |
| 193 return (klassOop)entry; | |
| 194 } else { | |
| 195 assert(entry->is_symbol(), "must be either symbol or klass"); | |
| 196 Thread *thread = Thread::current(); | |
| 197 symbolHandle name (thread, (symbolOop)entry); | |
| 198 oop loader = instanceKlass::cast(this_oop->pool_holder())->class_loader(); | |
| 199 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); | |
| 200 Handle h_prot (thread, protection_domain); | |
| 201 Handle h_loader (thread, loader); | |
| 202 klassOop k = SystemDictionary::find(name, h_loader, h_prot, thread); | |
| 203 | |
| 204 if (k != NULL) { | |
| 205 // Make sure that resolving is legal | |
| 206 EXCEPTION_MARK; | |
| 207 KlassHandle klass(THREAD, k); | |
| 208 // return NULL if verification fails | |
| 209 verify_constant_pool_resolve(this_oop, klass, THREAD); | |
| 210 if (HAS_PENDING_EXCEPTION) { | |
| 211 CLEAR_PENDING_EXCEPTION; | |
| 212 return NULL; | |
| 213 } | |
| 214 return klass(); | |
| 215 } else { | |
| 216 return k; | |
| 217 } | |
| 218 } | |
| 219 } | |
| 220 | |
| 221 | |
| 222 klassOop constantPoolOopDesc::klass_ref_at_if_loaded(constantPoolHandle this_oop, int which) { | |
| 223 return klass_at_if_loaded(this_oop, this_oop->klass_ref_index_at(which)); | |
| 224 } | |
| 225 | |
| 226 | |
| 227 // This is an interface for the compiler that allows accessing non-resolved entries | |
| 228 // in the constant pool - but still performs the validations tests. Must be used | |
| 229 // in a pre-parse of the compiler - to determine what it can do and not do. | |
| 230 // Note: We cannot update the ConstantPool from the vm_thread. | |
| 231 klassOop constantPoolOopDesc::klass_ref_at_if_loaded_check(constantPoolHandle this_oop, int index, TRAPS) { | |
| 232 int which = this_oop->klass_ref_index_at(index); | |
| 233 oop entry = *this_oop->obj_at_addr(which); | |
| 234 if (entry->is_klass()) { | |
| 235 return (klassOop)entry; | |
| 236 } else { | |
| 237 assert(entry->is_symbol(), "must be either symbol or klass"); | |
| 238 symbolHandle name (THREAD, (symbolOop)entry); | |
| 239 oop loader = instanceKlass::cast(this_oop->pool_holder())->class_loader(); | |
| 240 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain(); | |
| 241 Handle h_loader(THREAD, loader); | |
| 242 Handle h_prot (THREAD, protection_domain); | |
| 243 KlassHandle k(THREAD, SystemDictionary::find(name, h_loader, h_prot, THREAD)); | |
| 244 | |
| 245 // Do access check for klasses | |
| 246 if( k.not_null() ) verify_constant_pool_resolve(this_oop, k, CHECK_NULL); | |
| 247 return k(); | |
| 248 } | |
| 249 } | |
| 250 | |
| 251 | |
| 252 symbolOop constantPoolOopDesc::uncached_name_ref_at(int which) { | |
| 253 jint ref_index = name_and_type_at(uncached_name_and_type_ref_index_at(which)); | |
| 254 int name_index = extract_low_short_from_int(ref_index); | |
| 255 return symbol_at(name_index); | |
| 256 } | |
| 257 | |
| 258 | |
| 259 symbolOop constantPoolOopDesc::uncached_signature_ref_at(int which) { | |
| 260 jint ref_index = name_and_type_at(uncached_name_and_type_ref_index_at(which)); | |
| 261 int signature_index = extract_high_short_from_int(ref_index); | |
| 262 return symbol_at(signature_index); | |
| 263 } | |
| 264 | |
| 265 | |
| 266 int constantPoolOopDesc::uncached_name_and_type_ref_index_at(int which) { | |
| 267 jint ref_index = field_or_method_at(which, true); | |
| 268 return extract_high_short_from_int(ref_index); | |
| 269 } | |
| 270 | |
| 271 | |
| 272 int constantPoolOopDesc::uncached_klass_ref_index_at(int which) { | |
| 273 jint ref_index = field_or_method_at(which, true); | |
| 274 return extract_low_short_from_int(ref_index); | |
| 275 } | |
| 276 | |
| 277 | |
| 278 void constantPoolOopDesc::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) { | |
| 279 if (k->oop_is_instance() || k->oop_is_objArray()) { | |
| 280 instanceKlassHandle holder (THREAD, this_oop->pool_holder()); | |
| 281 klassOop elem_oop = k->oop_is_instance() ? k() : objArrayKlass::cast(k())->bottom_klass(); | |
| 282 KlassHandle element (THREAD, elem_oop); | |
| 283 | |
| 284 // The element type could be a typeArray - we only need the access check if it is | |
| 285 // an reference to another class | |
| 286 if (element->oop_is_instance()) { | |
| 287 LinkResolver::check_klass_accessability(holder, element, CHECK); | |
| 288 } | |
| 289 } | |
| 290 } | |
| 291 | |
| 292 | |
| 293 int constantPoolOopDesc::klass_ref_index_at(int which) { | |
| 294 jint ref_index = field_or_method_at(which, false); | |
| 295 return extract_low_short_from_int(ref_index); | |
| 296 } | |
| 297 | |
| 298 | |
| 299 int constantPoolOopDesc::name_and_type_ref_index_at(int which) { | |
| 300 jint ref_index = field_or_method_at(which, false); | |
| 301 return extract_high_short_from_int(ref_index); | |
| 302 } | |
| 303 | |
| 304 | |
| 305 int constantPoolOopDesc::name_ref_index_at(int which) { | |
| 306 jint ref_index = name_and_type_at(which); | |
| 307 return extract_low_short_from_int(ref_index); | |
| 308 } | |
| 309 | |
| 310 | |
| 311 int constantPoolOopDesc::signature_ref_index_at(int which) { | |
| 312 jint ref_index = name_and_type_at(which); | |
| 313 return extract_high_short_from_int(ref_index); | |
| 314 } | |
| 315 | |
| 316 | |
| 317 klassOop constantPoolOopDesc::klass_ref_at(int which, TRAPS) { | |
| 318 return klass_at(klass_ref_index_at(which), CHECK_NULL); | |
| 319 } | |
| 320 | |
| 321 | |
| 322 symbolOop constantPoolOopDesc::klass_name_at(int which) { | |
| 323 assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(), | |
| 324 "Corrupted constant pool"); | |
| 325 // A resolved constantPool entry will contain a klassOop, otherwise a symbolOop. | |
| 326 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and | |
| 327 // tag is not updated atomicly. | |
| 328 oop entry = *(obj_at_addr(which)); | |
| 329 if (entry->is_klass()) { | |
| 330 // Already resolved - return entry's name. | |
| 331 return klassOop(entry)->klass_part()->name(); | |
| 332 } else { | |
| 333 assert(entry->is_symbol(), "must be either symbol or klass"); | |
| 334 return (symbolOop)entry; | |
| 335 } | |
| 336 } | |
| 337 | |
| 338 symbolOop constantPoolOopDesc::klass_ref_at_noresolve(int which) { | |
| 339 jint ref_index = klass_ref_index_at(which); | |
| 340 return klass_at_noresolve(ref_index); | |
| 341 } | |
| 342 | |
| 343 char* constantPoolOopDesc::string_at_noresolve(int which) { | |
| 344 // Test entry type in case string is resolved while in here. | |
| 345 oop entry = *(obj_at_addr(which)); | |
| 346 if (entry->is_symbol()) { | |
| 347 return ((symbolOop)entry)->as_C_string(); | |
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348 } else if (java_lang_String::is_instance(entry)) { |
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349 return java_lang_String::as_utf8_string(entry); |
| 0 | 350 } else { |
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351 return (char*)"<pseudo-string>"; |
| 0 | 352 } |
| 353 } | |
| 354 | |
| 355 | |
| 356 symbolOop constantPoolOopDesc::name_ref_at(int which) { | |
| 357 jint ref_index = name_and_type_at(name_and_type_ref_index_at(which)); | |
| 358 int name_index = extract_low_short_from_int(ref_index); | |
| 359 return symbol_at(name_index); | |
| 360 } | |
| 361 | |
| 362 | |
| 363 symbolOop constantPoolOopDesc::signature_ref_at(int which) { | |
| 364 jint ref_index = name_and_type_at(name_and_type_ref_index_at(which)); | |
| 365 int signature_index = extract_high_short_from_int(ref_index); | |
| 366 return symbol_at(signature_index); | |
| 367 } | |
| 368 | |
| 369 | |
| 370 BasicType constantPoolOopDesc::basic_type_for_signature_at(int which) { | |
| 371 return FieldType::basic_type(symbol_at(which)); | |
| 372 } | |
| 373 | |
| 374 | |
| 375 void constantPoolOopDesc::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) { | |
| 376 for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused | |
| 377 if (this_oop->tag_at(index).is_unresolved_string()) { | |
| 378 this_oop->string_at(index, CHECK); | |
| 379 } | |
| 380 } | |
| 381 } | |
| 382 | |
| 383 oop constantPoolOopDesc::string_at_impl(constantPoolHandle this_oop, int which, TRAPS) { | |
| 384 oop entry = *(this_oop->obj_at_addr(which)); | |
| 385 if (entry->is_symbol()) { | |
| 386 ObjectLocker ol(this_oop, THREAD); | |
| 387 if (this_oop->tag_at(which).is_unresolved_string()) { | |
| 388 // Intern string | |
| 389 symbolOop sym = this_oop->unresolved_string_at(which); | |
| 390 entry = StringTable::intern(sym, CHECK_(constantPoolOop(NULL))); | |
| 391 this_oop->string_at_put(which, entry); | |
| 392 } else { | |
| 393 // Another thread beat us and interned string, read string from constant pool | |
| 394 entry = this_oop->resolved_string_at(which); | |
| 395 } | |
| 396 } | |
| 397 assert(java_lang_String::is_instance(entry), "must be string"); | |
| 398 return entry; | |
| 399 } | |
| 400 | |
| 401 | |
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402 bool constantPoolOopDesc::is_pseudo_string_at(int which) { |
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403 oop entry = *(obj_at_addr(which)); |
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404 if (entry->is_symbol()) |
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405 // Not yet resolved, but it will resolve to a string. |
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406 return false; |
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407 else if (java_lang_String::is_instance(entry)) |
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408 return false; // actually, it might be a non-interned or non-perm string |
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409 else |
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410 // truly pseudo |
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411 return true; |
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412 } |
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413 |
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414 |
| 0 | 415 bool constantPoolOopDesc::klass_name_at_matches(instanceKlassHandle k, |
| 416 int which) { | |
| 417 // Names are interned, so we can compare symbolOops directly | |
| 418 symbolOop cp_name = klass_name_at(which); | |
| 419 return (cp_name == k->name()); | |
| 420 } | |
| 421 | |
| 422 | |
| 423 int constantPoolOopDesc::pre_resolve_shared_klasses(TRAPS) { | |
| 424 ResourceMark rm; | |
| 425 int count = 0; | |
| 426 for (int index = 1; index < tags()->length(); index++) { // Index 0 is unused | |
| 427 if (tag_at(index).is_unresolved_string()) { | |
| 428 // Intern string | |
| 429 symbolOop sym = unresolved_string_at(index); | |
| 430 oop entry = StringTable::intern(sym, CHECK_(-1)); | |
| 431 string_at_put(index, entry); | |
| 432 } | |
| 433 } | |
| 434 return count; | |
| 435 } | |
| 436 | |
| 437 | |
| 438 // Iterate over symbols which are used as class, field, method names and | |
| 439 // signatures (in preparation for writing to the shared archive). | |
| 440 | |
| 441 void constantPoolOopDesc::shared_symbols_iterate(OopClosure* closure) { | |
| 442 for (int index = 1; index < length(); index++) { // Index 0 is unused | |
| 443 switch (tag_at(index).value()) { | |
| 444 | |
| 445 case JVM_CONSTANT_UnresolvedClass: | |
| 446 closure->do_oop(obj_at_addr(index)); | |
| 447 break; | |
| 448 | |
| 449 case JVM_CONSTANT_NameAndType: | |
| 450 { | |
| 451 int i = *int_at_addr(index); | |
| 452 closure->do_oop(obj_at_addr((unsigned)i >> 16)); | |
| 453 closure->do_oop(obj_at_addr((unsigned)i & 0xffff)); | |
| 454 } | |
| 455 break; | |
| 456 | |
| 457 case JVM_CONSTANT_Class: | |
| 458 case JVM_CONSTANT_InterfaceMethodref: | |
| 459 case JVM_CONSTANT_Fieldref: | |
| 460 case JVM_CONSTANT_Methodref: | |
| 461 case JVM_CONSTANT_Integer: | |
| 462 case JVM_CONSTANT_Float: | |
| 463 // Do nothing! Not an oop. | |
| 464 // These constant types do not reference symbols at this point. | |
| 465 break; | |
| 466 | |
| 467 case JVM_CONSTANT_String: | |
| 468 // Do nothing! Not a symbol. | |
| 469 break; | |
| 470 | |
| 471 case JVM_CONSTANT_UnresolvedString: | |
| 472 case JVM_CONSTANT_Utf8: | |
| 473 // These constants are symbols, but unless these symbols are | |
| 474 // actually to be used for something, we don't want to mark them. | |
| 475 break; | |
| 476 | |
| 477 case JVM_CONSTANT_Long: | |
| 478 case JVM_CONSTANT_Double: | |
| 479 // Do nothing! Not an oop. (But takes two pool entries.) | |
| 480 ++index; | |
| 481 break; | |
| 482 | |
| 483 default: | |
| 484 ShouldNotReachHere(); | |
| 485 break; | |
| 486 } | |
| 487 } | |
| 488 } | |
| 489 | |
| 490 | |
| 491 // Iterate over the [one] tags array (in preparation for writing to the | |
| 492 // shared archive). | |
| 493 | |
| 494 void constantPoolOopDesc::shared_tags_iterate(OopClosure* closure) { | |
| 495 closure->do_oop(tags_addr()); | |
| 496 } | |
| 497 | |
| 498 | |
| 499 // Iterate over String objects (in preparation for writing to the shared | |
| 500 // archive). | |
| 501 | |
| 502 void constantPoolOopDesc::shared_strings_iterate(OopClosure* closure) { | |
| 503 for (int index = 1; index < length(); index++) { // Index 0 is unused | |
| 504 switch (tag_at(index).value()) { | |
| 505 | |
| 506 case JVM_CONSTANT_UnresolvedClass: | |
| 507 case JVM_CONSTANT_NameAndType: | |
| 508 // Do nothing! Not a String. | |
| 509 break; | |
| 510 | |
| 511 case JVM_CONSTANT_Class: | |
| 512 case JVM_CONSTANT_InterfaceMethodref: | |
| 513 case JVM_CONSTANT_Fieldref: | |
| 514 case JVM_CONSTANT_Methodref: | |
| 515 case JVM_CONSTANT_Integer: | |
| 516 case JVM_CONSTANT_Float: | |
| 517 // Do nothing! Not an oop. | |
| 518 // These constant types do not reference symbols at this point. | |
| 519 break; | |
| 520 | |
| 521 case JVM_CONSTANT_String: | |
| 522 closure->do_oop(obj_at_addr(index)); | |
| 523 break; | |
| 524 | |
| 525 case JVM_CONSTANT_UnresolvedString: | |
| 526 case JVM_CONSTANT_Utf8: | |
| 527 // These constants are symbols, but unless these symbols are | |
| 528 // actually to be used for something, we don't want to mark them. | |
| 529 break; | |
| 530 | |
| 531 case JVM_CONSTANT_Long: | |
| 532 case JVM_CONSTANT_Double: | |
| 533 // Do nothing! Not an oop. (But takes two pool entries.) | |
| 534 ++index; | |
| 535 break; | |
| 536 | |
| 537 default: | |
| 538 ShouldNotReachHere(); | |
| 539 break; | |
| 540 } | |
| 541 } | |
| 542 } | |
| 543 | |
| 544 | |
| 545 // Compare this constant pool's entry at index1 to the constant pool | |
| 546 // cp2's entry at index2. | |
| 547 bool constantPoolOopDesc::compare_entry_to(int index1, constantPoolHandle cp2, | |
| 548 int index2, TRAPS) { | |
| 549 | |
| 550 jbyte t1 = tag_at(index1).value(); | |
| 551 jbyte t2 = cp2->tag_at(index2).value(); | |
| 552 | |
| 553 | |
| 554 // JVM_CONSTANT_UnresolvedClassInError is equal to JVM_CONSTANT_UnresolvedClass | |
| 555 // when comparing | |
| 556 if (t1 == JVM_CONSTANT_UnresolvedClassInError) { | |
| 557 t1 = JVM_CONSTANT_UnresolvedClass; | |
| 558 } | |
| 559 if (t2 == JVM_CONSTANT_UnresolvedClassInError) { | |
| 560 t2 = JVM_CONSTANT_UnresolvedClass; | |
| 561 } | |
| 562 | |
| 563 if (t1 != t2) { | |
| 564 // Not the same entry type so there is nothing else to check. Note | |
| 565 // that this style of checking will consider resolved/unresolved | |
| 566 // class pairs and resolved/unresolved string pairs as different. | |
| 567 // From the constantPoolOop API point of view, this is correct | |
| 568 // behavior. See constantPoolKlass::merge() to see how this plays | |
| 569 // out in the context of constantPoolOop merging. | |
| 570 return false; | |
| 571 } | |
| 572 | |
| 573 switch (t1) { | |
| 574 case JVM_CONSTANT_Class: | |
| 575 { | |
| 576 klassOop k1 = klass_at(index1, CHECK_false); | |
| 577 klassOop k2 = cp2->klass_at(index2, CHECK_false); | |
| 578 if (k1 == k2) { | |
| 579 return true; | |
| 580 } | |
| 581 } break; | |
| 582 | |
| 583 case JVM_CONSTANT_ClassIndex: | |
| 584 { | |
| 585 int recur1 = klass_index_at(index1); | |
| 586 int recur2 = cp2->klass_index_at(index2); | |
| 587 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 588 if (match) { | |
| 589 return true; | |
| 590 } | |
| 591 } break; | |
| 592 | |
| 593 case JVM_CONSTANT_Double: | |
| 594 { | |
| 595 jdouble d1 = double_at(index1); | |
| 596 jdouble d2 = cp2->double_at(index2); | |
| 597 if (d1 == d2) { | |
| 598 return true; | |
| 599 } | |
| 600 } break; | |
| 601 | |
| 602 case JVM_CONSTANT_Fieldref: | |
| 603 case JVM_CONSTANT_InterfaceMethodref: | |
| 604 case JVM_CONSTANT_Methodref: | |
| 605 { | |
| 606 int recur1 = uncached_klass_ref_index_at(index1); | |
| 607 int recur2 = cp2->uncached_klass_ref_index_at(index2); | |
| 608 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 609 if (match) { | |
| 610 recur1 = uncached_name_and_type_ref_index_at(index1); | |
| 611 recur2 = cp2->uncached_name_and_type_ref_index_at(index2); | |
| 612 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 613 if (match) { | |
| 614 return true; | |
| 615 } | |
| 616 } | |
| 617 } break; | |
| 618 | |
| 619 case JVM_CONSTANT_Float: | |
| 620 { | |
| 621 jfloat f1 = float_at(index1); | |
| 622 jfloat f2 = cp2->float_at(index2); | |
| 623 if (f1 == f2) { | |
| 624 return true; | |
| 625 } | |
| 626 } break; | |
| 627 | |
| 628 case JVM_CONSTANT_Integer: | |
| 629 { | |
| 630 jint i1 = int_at(index1); | |
| 631 jint i2 = cp2->int_at(index2); | |
| 632 if (i1 == i2) { | |
| 633 return true; | |
| 634 } | |
| 635 } break; | |
| 636 | |
| 637 case JVM_CONSTANT_Long: | |
| 638 { | |
| 639 jlong l1 = long_at(index1); | |
| 640 jlong l2 = cp2->long_at(index2); | |
| 641 if (l1 == l2) { | |
| 642 return true; | |
| 643 } | |
| 644 } break; | |
| 645 | |
| 646 case JVM_CONSTANT_NameAndType: | |
| 647 { | |
| 648 int recur1 = name_ref_index_at(index1); | |
| 649 int recur2 = cp2->name_ref_index_at(index2); | |
| 650 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 651 if (match) { | |
| 652 recur1 = signature_ref_index_at(index1); | |
| 653 recur2 = cp2->signature_ref_index_at(index2); | |
| 654 match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 655 if (match) { | |
| 656 return true; | |
| 657 } | |
| 658 } | |
| 659 } break; | |
| 660 | |
| 661 case JVM_CONSTANT_String: | |
| 662 { | |
| 663 oop s1 = string_at(index1, CHECK_false); | |
| 664 oop s2 = cp2->string_at(index2, CHECK_false); | |
| 665 if (s1 == s2) { | |
| 666 return true; | |
| 667 } | |
| 668 } break; | |
| 669 | |
| 670 case JVM_CONSTANT_StringIndex: | |
| 671 { | |
| 672 int recur1 = string_index_at(index1); | |
| 673 int recur2 = cp2->string_index_at(index2); | |
| 674 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); | |
| 675 if (match) { | |
| 676 return true; | |
| 677 } | |
| 678 } break; | |
| 679 | |
| 680 case JVM_CONSTANT_UnresolvedClass: | |
| 681 { | |
| 682 symbolOop k1 = unresolved_klass_at(index1); | |
| 683 symbolOop k2 = cp2->unresolved_klass_at(index2); | |
| 684 if (k1 == k2) { | |
| 685 return true; | |
| 686 } | |
| 687 } break; | |
| 688 | |
| 689 case JVM_CONSTANT_UnresolvedString: | |
| 690 { | |
| 691 symbolOop s1 = unresolved_string_at(index1); | |
| 692 symbolOop s2 = cp2->unresolved_string_at(index2); | |
| 693 if (s1 == s2) { | |
| 694 return true; | |
| 695 } | |
| 696 } break; | |
| 697 | |
| 698 case JVM_CONSTANT_Utf8: | |
| 699 { | |
| 700 symbolOop s1 = symbol_at(index1); | |
| 701 symbolOop s2 = cp2->symbol_at(index2); | |
| 702 if (s1 == s2) { | |
| 703 return true; | |
| 704 } | |
| 705 } break; | |
| 706 | |
| 707 // Invalid is used as the tag for the second constant pool entry | |
| 708 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
| 709 // not be seen by itself. | |
| 710 case JVM_CONSTANT_Invalid: // fall through | |
| 711 | |
| 712 default: | |
| 713 ShouldNotReachHere(); | |
| 714 break; | |
| 715 } | |
| 716 | |
| 717 return false; | |
| 718 } // end compare_entry_to() | |
| 719 | |
| 720 | |
| 721 // Copy this constant pool's entries at start_i to end_i (inclusive) | |
| 722 // to the constant pool to_cp's entries starting at to_i. A total of | |
| 723 // (end_i - start_i) + 1 entries are copied. | |
| 724 void constantPoolOopDesc::copy_cp_to(int start_i, int end_i, | |
| 725 constantPoolHandle to_cp, int to_i, TRAPS) { | |
| 726 | |
| 727 int dest_i = to_i; // leave original alone for debug purposes | |
| 728 | |
| 729 for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) { | |
| 730 copy_entry_to(src_i, to_cp, dest_i, CHECK); | |
| 731 | |
| 732 switch (tag_at(src_i).value()) { | |
| 733 case JVM_CONSTANT_Double: | |
| 734 case JVM_CONSTANT_Long: | |
| 735 // double and long take two constant pool entries | |
| 736 src_i += 2; | |
| 737 dest_i += 2; | |
| 738 break; | |
| 739 | |
| 740 default: | |
| 741 // all others take one constant pool entry | |
| 742 src_i++; | |
| 743 dest_i++; | |
| 744 break; | |
| 745 } | |
| 746 } | |
| 747 } // end copy_cp_to() | |
| 748 | |
| 749 | |
| 750 // Copy this constant pool's entry at from_i to the constant pool | |
| 751 // to_cp's entry at to_i. | |
| 752 void constantPoolOopDesc::copy_entry_to(int from_i, constantPoolHandle to_cp, | |
| 753 int to_i, TRAPS) { | |
| 754 | |
| 755 switch (tag_at(from_i).value()) { | |
| 756 case JVM_CONSTANT_Class: | |
| 757 { | |
| 758 klassOop k = klass_at(from_i, CHECK); | |
| 759 to_cp->klass_at_put(to_i, k); | |
| 760 } break; | |
| 761 | |
| 762 case JVM_CONSTANT_ClassIndex: | |
| 763 { | |
| 764 jint ki = klass_index_at(from_i); | |
| 765 to_cp->klass_index_at_put(to_i, ki); | |
| 766 } break; | |
| 767 | |
| 768 case JVM_CONSTANT_Double: | |
| 769 { | |
| 770 jdouble d = double_at(from_i); | |
| 771 to_cp->double_at_put(to_i, d); | |
| 772 // double takes two constant pool entries so init second entry's tag | |
| 773 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
| 774 } break; | |
| 775 | |
| 776 case JVM_CONSTANT_Fieldref: | |
| 777 { | |
| 778 int class_index = uncached_klass_ref_index_at(from_i); | |
| 779 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
| 780 to_cp->field_at_put(to_i, class_index, name_and_type_index); | |
| 781 } break; | |
| 782 | |
| 783 case JVM_CONSTANT_Float: | |
| 784 { | |
| 785 jfloat f = float_at(from_i); | |
| 786 to_cp->float_at_put(to_i, f); | |
| 787 } break; | |
| 788 | |
| 789 case JVM_CONSTANT_Integer: | |
| 790 { | |
| 791 jint i = int_at(from_i); | |
| 792 to_cp->int_at_put(to_i, i); | |
| 793 } break; | |
| 794 | |
| 795 case JVM_CONSTANT_InterfaceMethodref: | |
| 796 { | |
| 797 int class_index = uncached_klass_ref_index_at(from_i); | |
| 798 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
| 799 to_cp->interface_method_at_put(to_i, class_index, name_and_type_index); | |
| 800 } break; | |
| 801 | |
| 802 case JVM_CONSTANT_Long: | |
| 803 { | |
| 804 jlong l = long_at(from_i); | |
| 805 to_cp->long_at_put(to_i, l); | |
| 806 // long takes two constant pool entries so init second entry's tag | |
| 807 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); | |
| 808 } break; | |
| 809 | |
| 810 case JVM_CONSTANT_Methodref: | |
| 811 { | |
| 812 int class_index = uncached_klass_ref_index_at(from_i); | |
| 813 int name_and_type_index = uncached_name_and_type_ref_index_at(from_i); | |
| 814 to_cp->method_at_put(to_i, class_index, name_and_type_index); | |
| 815 } break; | |
| 816 | |
| 817 case JVM_CONSTANT_NameAndType: | |
| 818 { | |
| 819 int name_ref_index = name_ref_index_at(from_i); | |
| 820 int signature_ref_index = signature_ref_index_at(from_i); | |
| 821 to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index); | |
| 822 } break; | |
| 823 | |
| 824 case JVM_CONSTANT_String: | |
| 825 { | |
| 826 oop s = string_at(from_i, CHECK); | |
| 827 to_cp->string_at_put(to_i, s); | |
| 828 } break; | |
| 829 | |
| 830 case JVM_CONSTANT_StringIndex: | |
| 831 { | |
| 832 jint si = string_index_at(from_i); | |
| 833 to_cp->string_index_at_put(to_i, si); | |
| 834 } break; | |
| 835 | |
| 836 case JVM_CONSTANT_UnresolvedClass: | |
| 837 { | |
| 838 symbolOop k = unresolved_klass_at(from_i); | |
| 839 to_cp->unresolved_klass_at_put(to_i, k); | |
| 840 } break; | |
| 841 | |
| 842 case JVM_CONSTANT_UnresolvedClassInError: | |
| 843 { | |
| 844 symbolOop k = unresolved_klass_at(from_i); | |
| 845 to_cp->unresolved_klass_at_put(to_i, k); | |
| 846 to_cp->tag_at_put(to_i, JVM_CONSTANT_UnresolvedClassInError); | |
| 847 } break; | |
| 848 | |
| 849 | |
| 850 case JVM_CONSTANT_UnresolvedString: | |
| 851 { | |
| 852 symbolOop s = unresolved_string_at(from_i); | |
| 853 to_cp->unresolved_string_at_put(to_i, s); | |
| 854 } break; | |
| 855 | |
| 856 case JVM_CONSTANT_Utf8: | |
| 857 { | |
| 858 symbolOop s = symbol_at(from_i); | |
| 859 to_cp->symbol_at_put(to_i, s); | |
| 860 } break; | |
| 861 | |
| 862 // Invalid is used as the tag for the second constant pool entry | |
| 863 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should | |
| 864 // not be seen by itself. | |
| 865 case JVM_CONSTANT_Invalid: // fall through | |
| 866 | |
| 867 default: | |
| 868 { | |
| 869 jbyte bad_value = tag_at(from_i).value(); // leave a breadcrumb | |
| 870 ShouldNotReachHere(); | |
| 871 } break; | |
| 872 } | |
| 873 } // end copy_entry_to() | |
| 874 | |
| 875 | |
| 876 // Search constant pool search_cp for an entry that matches this | |
| 877 // constant pool's entry at pattern_i. Returns the index of a | |
| 878 // matching entry or zero (0) if there is no matching entry. | |
| 879 int constantPoolOopDesc::find_matching_entry(int pattern_i, | |
| 880 constantPoolHandle search_cp, TRAPS) { | |
| 881 | |
| 882 // index zero (0) is not used | |
| 883 for (int i = 1; i < search_cp->length(); i++) { | |
| 884 bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0); | |
| 885 if (found) { | |
| 886 return i; | |
| 887 } | |
| 888 } | |
| 889 | |
| 890 return 0; // entry not found; return unused index zero (0) | |
| 891 } // end find_matching_entry() | |
| 892 | |
| 893 | |
| 894 #ifndef PRODUCT | |
| 895 | |
| 896 const char* constantPoolOopDesc::printable_name_at(int which) { | |
| 897 | |
| 898 constantTag tag = tag_at(which); | |
| 899 | |
| 900 if (tag.is_unresolved_string() || tag.is_string()) { | |
| 901 return string_at_noresolve(which); | |
| 902 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
| 903 return klass_name_at(which)->as_C_string(); | |
| 904 } else if (tag.is_symbol()) { | |
| 905 return symbol_at(which)->as_C_string(); | |
| 906 } | |
| 907 return ""; | |
| 908 } | |
| 909 | |
| 910 #endif // PRODUCT | |
| 911 | |
| 912 | |
| 913 // JVMTI GetConstantPool support | |
| 914 | |
| 915 // For temporary use until code is stable. | |
| 916 #define DBG(code) | |
| 917 | |
| 918 static const char* WARN_MSG = "Must not be such entry!"; | |
| 919 | |
| 920 static void print_cpool_bytes(jint cnt, u1 *bytes) { | |
| 921 jint size = 0; | |
| 922 u2 idx1, idx2; | |
| 923 | |
| 924 for (jint idx = 1; idx < cnt; idx++) { | |
| 925 jint ent_size = 0; | |
| 926 u1 tag = *bytes++; | |
| 927 size++; // count tag | |
| 928 | |
| 929 printf("const #%03d, tag: %02d ", idx, tag); | |
| 930 switch(tag) { | |
| 931 case JVM_CONSTANT_Invalid: { | |
| 932 printf("Invalid"); | |
| 933 break; | |
| 934 } | |
| 935 case JVM_CONSTANT_Unicode: { | |
| 936 printf("Unicode %s", WARN_MSG); | |
| 937 break; | |
| 938 } | |
| 939 case JVM_CONSTANT_Utf8: { | |
| 940 u2 len = Bytes::get_Java_u2(bytes); | |
| 941 char str[128]; | |
| 942 if (len > 127) { | |
| 943 len = 127; | |
| 944 } | |
| 945 strncpy(str, (char *) (bytes+2), len); | |
| 946 str[len] = '\0'; | |
| 947 printf("Utf8 \"%s\"", str); | |
| 948 ent_size = 2 + len; | |
| 949 break; | |
| 950 } | |
| 951 case JVM_CONSTANT_Integer: { | |
| 952 u4 val = Bytes::get_Java_u4(bytes); | |
| 953 printf("int %d", *(int *) &val); | |
| 954 ent_size = 4; | |
| 955 break; | |
| 956 } | |
| 957 case JVM_CONSTANT_Float: { | |
| 958 u4 val = Bytes::get_Java_u4(bytes); | |
| 959 printf("float %5.3ff", *(float *) &val); | |
| 960 ent_size = 4; | |
| 961 break; | |
| 962 } | |
| 963 case JVM_CONSTANT_Long: { | |
| 964 u8 val = Bytes::get_Java_u8(bytes); | |
|
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965 printf("long "INT64_FORMAT, *(jlong *) &val); |
| 0 | 966 ent_size = 8; |
| 967 idx++; // Long takes two cpool slots | |
| 968 break; | |
| 969 } | |
| 970 case JVM_CONSTANT_Double: { | |
| 971 u8 val = Bytes::get_Java_u8(bytes); | |
| 972 printf("double %5.3fd", *(jdouble *)&val); | |
| 973 ent_size = 8; | |
| 974 idx++; // Double takes two cpool slots | |
| 975 break; | |
| 976 } | |
| 977 case JVM_CONSTANT_Class: { | |
| 978 idx1 = Bytes::get_Java_u2(bytes); | |
| 979 printf("class #%03d", idx1); | |
| 980 ent_size = 2; | |
| 981 break; | |
| 982 } | |
| 983 case JVM_CONSTANT_String: { | |
| 984 idx1 = Bytes::get_Java_u2(bytes); | |
| 985 printf("String #%03d", idx1); | |
| 986 ent_size = 2; | |
| 987 break; | |
| 988 } | |
| 989 case JVM_CONSTANT_Fieldref: { | |
| 990 idx1 = Bytes::get_Java_u2(bytes); | |
| 991 idx2 = Bytes::get_Java_u2(bytes+2); | |
| 992 printf("Field #%03d, #%03d", (int) idx1, (int) idx2); | |
| 993 ent_size = 4; | |
| 994 break; | |
| 995 } | |
| 996 case JVM_CONSTANT_Methodref: { | |
| 997 idx1 = Bytes::get_Java_u2(bytes); | |
| 998 idx2 = Bytes::get_Java_u2(bytes+2); | |
| 999 printf("Method #%03d, #%03d", idx1, idx2); | |
| 1000 ent_size = 4; | |
| 1001 break; | |
| 1002 } | |
| 1003 case JVM_CONSTANT_InterfaceMethodref: { | |
| 1004 idx1 = Bytes::get_Java_u2(bytes); | |
| 1005 idx2 = Bytes::get_Java_u2(bytes+2); | |
| 1006 printf("InterfMethod #%03d, #%03d", idx1, idx2); | |
| 1007 ent_size = 4; | |
| 1008 break; | |
| 1009 } | |
| 1010 case JVM_CONSTANT_NameAndType: { | |
| 1011 idx1 = Bytes::get_Java_u2(bytes); | |
| 1012 idx2 = Bytes::get_Java_u2(bytes+2); | |
| 1013 printf("NameAndType #%03d, #%03d", idx1, idx2); | |
| 1014 ent_size = 4; | |
| 1015 break; | |
| 1016 } | |
| 1017 case JVM_CONSTANT_ClassIndex: { | |
| 1018 printf("ClassIndex %s", WARN_MSG); | |
| 1019 break; | |
| 1020 } | |
| 1021 case JVM_CONSTANT_UnresolvedClass: { | |
| 1022 printf("UnresolvedClass: %s", WARN_MSG); | |
| 1023 break; | |
| 1024 } | |
| 1025 case JVM_CONSTANT_UnresolvedClassInError: { | |
| 1026 printf("UnresolvedClassInErr: %s", WARN_MSG); | |
| 1027 break; | |
| 1028 } | |
| 1029 case JVM_CONSTANT_StringIndex: { | |
| 1030 printf("StringIndex: %s", WARN_MSG); | |
| 1031 break; | |
| 1032 } | |
| 1033 case JVM_CONSTANT_UnresolvedString: { | |
| 1034 printf("UnresolvedString: %s", WARN_MSG); | |
| 1035 break; | |
| 1036 } | |
| 1037 } | |
| 1038 printf(";\n"); | |
| 1039 bytes += ent_size; | |
| 1040 size += ent_size; | |
| 1041 } | |
| 1042 printf("Cpool size: %d\n", size); | |
| 1043 fflush(0); | |
| 1044 return; | |
| 1045 } /* end print_cpool_bytes */ | |
| 1046 | |
| 1047 | |
| 1048 // Returns size of constant pool entry. | |
| 1049 jint constantPoolOopDesc::cpool_entry_size(jint idx) { | |
| 1050 switch(tag_at(idx).value()) { | |
| 1051 case JVM_CONSTANT_Invalid: | |
| 1052 case JVM_CONSTANT_Unicode: | |
| 1053 return 1; | |
| 1054 | |
| 1055 case JVM_CONSTANT_Utf8: | |
| 1056 return 3 + symbol_at(idx)->utf8_length(); | |
| 1057 | |
| 1058 case JVM_CONSTANT_Class: | |
| 1059 case JVM_CONSTANT_String: | |
| 1060 case JVM_CONSTANT_ClassIndex: | |
| 1061 case JVM_CONSTANT_UnresolvedClass: | |
| 1062 case JVM_CONSTANT_UnresolvedClassInError: | |
| 1063 case JVM_CONSTANT_StringIndex: | |
| 1064 case JVM_CONSTANT_UnresolvedString: | |
| 1065 return 3; | |
| 1066 | |
| 1067 case JVM_CONSTANT_Integer: | |
| 1068 case JVM_CONSTANT_Float: | |
| 1069 case JVM_CONSTANT_Fieldref: | |
| 1070 case JVM_CONSTANT_Methodref: | |
| 1071 case JVM_CONSTANT_InterfaceMethodref: | |
| 1072 case JVM_CONSTANT_NameAndType: | |
| 1073 return 5; | |
| 1074 | |
| 1075 case JVM_CONSTANT_Long: | |
| 1076 case JVM_CONSTANT_Double: | |
| 1077 return 9; | |
| 1078 } | |
| 1079 assert(false, "cpool_entry_size: Invalid constant pool entry tag"); | |
| 1080 return 1; | |
| 1081 } /* end cpool_entry_size */ | |
| 1082 | |
| 1083 | |
| 1084 // SymbolHashMap is used to find a constant pool index from a string. | |
| 1085 // This function fills in SymbolHashMaps, one for utf8s and one for | |
| 1086 // class names, returns size of the cpool raw bytes. | |
| 1087 jint constantPoolOopDesc::hash_entries_to(SymbolHashMap *symmap, | |
| 1088 SymbolHashMap *classmap) { | |
| 1089 jint size = 0; | |
| 1090 | |
| 1091 for (u2 idx = 1; idx < length(); idx++) { | |
| 1092 u2 tag = tag_at(idx).value(); | |
| 1093 size += cpool_entry_size(idx); | |
| 1094 | |
| 1095 switch(tag) { | |
| 1096 case JVM_CONSTANT_Utf8: { | |
| 1097 symbolOop sym = symbol_at(idx); | |
| 1098 symmap->add_entry(sym, idx); | |
| 1099 DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx)); | |
| 1100 break; | |
| 1101 } | |
| 1102 case JVM_CONSTANT_Class: | |
| 1103 case JVM_CONSTANT_UnresolvedClass: | |
| 1104 case JVM_CONSTANT_UnresolvedClassInError: { | |
| 1105 symbolOop sym = klass_name_at(idx); | |
| 1106 classmap->add_entry(sym, idx); | |
| 1107 DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx)); | |
| 1108 break; | |
| 1109 } | |
| 1110 case JVM_CONSTANT_Long: | |
| 1111 case JVM_CONSTANT_Double: { | |
| 1112 idx++; // Both Long and Double take two cpool slots | |
| 1113 break; | |
| 1114 } | |
| 1115 } | |
| 1116 } | |
| 1117 return size; | |
| 1118 } /* end hash_utf8_entries_to */ | |
| 1119 | |
| 1120 | |
| 1121 // Copy cpool bytes. | |
| 1122 // Returns: | |
| 1123 // 0, in case of OutOfMemoryError | |
| 1124 // -1, in case of internal error | |
| 1125 // > 0, count of the raw cpool bytes that have been copied | |
| 1126 int constantPoolOopDesc::copy_cpool_bytes(int cpool_size, | |
| 1127 SymbolHashMap* tbl, | |
| 1128 unsigned char *bytes) { | |
| 1129 u2 idx1, idx2; | |
| 1130 jint size = 0; | |
| 1131 jint cnt = length(); | |
| 1132 unsigned char *start_bytes = bytes; | |
| 1133 | |
| 1134 for (jint idx = 1; idx < cnt; idx++) { | |
| 1135 u1 tag = tag_at(idx).value(); | |
| 1136 jint ent_size = cpool_entry_size(idx); | |
| 1137 | |
| 1138 assert(size + ent_size <= cpool_size, "Size mismatch"); | |
| 1139 | |
| 1140 *bytes = tag; | |
| 1141 DBG(printf("#%03hd tag=%03hd, ", idx, tag)); | |
| 1142 switch(tag) { | |
| 1143 case JVM_CONSTANT_Invalid: { | |
| 1144 DBG(printf("JVM_CONSTANT_Invalid")); | |
| 1145 break; | |
| 1146 } | |
| 1147 case JVM_CONSTANT_Unicode: { | |
| 1148 assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode"); | |
| 1149 DBG(printf("JVM_CONSTANT_Unicode")); | |
| 1150 break; | |
| 1151 } | |
| 1152 case JVM_CONSTANT_Utf8: { | |
| 1153 symbolOop sym = symbol_at(idx); | |
| 1154 char* str = sym->as_utf8(); | |
| 1155 // Warning! It's crashing on x86 with len = sym->utf8_length() | |
| 1156 int len = (int) strlen(str); | |
| 1157 Bytes::put_Java_u2((address) (bytes+1), (u2) len); | |
| 1158 for (int i = 0; i < len; i++) { | |
| 1159 bytes[3+i] = (u1) str[i]; | |
| 1160 } | |
| 1161 DBG(printf("JVM_CONSTANT_Utf8: %s ", str)); | |
| 1162 break; | |
| 1163 } | |
| 1164 case JVM_CONSTANT_Integer: { | |
| 1165 jint val = int_at(idx); | |
| 1166 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
| 1167 break; | |
| 1168 } | |
| 1169 case JVM_CONSTANT_Float: { | |
| 1170 jfloat val = float_at(idx); | |
| 1171 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); | |
| 1172 break; | |
| 1173 } | |
| 1174 case JVM_CONSTANT_Long: { | |
| 1175 jlong val = long_at(idx); | |
| 1176 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
| 1177 idx++; // Long takes two cpool slots | |
| 1178 break; | |
| 1179 } | |
| 1180 case JVM_CONSTANT_Double: { | |
| 1181 jdouble val = double_at(idx); | |
| 1182 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); | |
| 1183 idx++; // Double takes two cpool slots | |
| 1184 break; | |
| 1185 } | |
| 1186 case JVM_CONSTANT_Class: | |
| 1187 case JVM_CONSTANT_UnresolvedClass: | |
| 1188 case JVM_CONSTANT_UnresolvedClassInError: { | |
| 1189 *bytes = JVM_CONSTANT_Class; | |
| 1190 symbolOop sym = klass_name_at(idx); | |
| 1191 idx1 = tbl->symbol_to_value(sym); | |
| 1192 assert(idx1 != 0, "Have not found a hashtable entry"); | |
| 1193 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1194 DBG(printf("JVM_CONSTANT_Class: idx=#%03hd, %s", idx1, sym->as_utf8())); | |
| 1195 break; | |
| 1196 } | |
| 1197 case JVM_CONSTANT_String: { | |
| 1198 unsigned int hash; | |
| 1199 char *str = string_at_noresolve(idx); | |
| 1200 symbolOop sym = SymbolTable::lookup_only(str, (int) strlen(str), hash); | |
| 1201 idx1 = tbl->symbol_to_value(sym); | |
| 1202 assert(idx1 != 0, "Have not found a hashtable entry"); | |
| 1203 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1204 DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, str)); | |
| 1205 break; | |
| 1206 } | |
| 1207 case JVM_CONSTANT_UnresolvedString: { | |
| 1208 *bytes = JVM_CONSTANT_String; | |
| 1209 symbolOop sym = unresolved_string_at(idx); | |
| 1210 idx1 = tbl->symbol_to_value(sym); | |
| 1211 assert(idx1 != 0, "Have not found a hashtable entry"); | |
| 1212 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1213 DBG(char *str = sym->as_utf8()); | |
| 1214 DBG(printf("JVM_CONSTANT_UnresolvedString: idx=#%03hd, %s", idx1, str)); | |
| 1215 break; | |
| 1216 } | |
| 1217 case JVM_CONSTANT_Fieldref: | |
| 1218 case JVM_CONSTANT_Methodref: | |
| 1219 case JVM_CONSTANT_InterfaceMethodref: { | |
| 1220 idx1 = uncached_klass_ref_index_at(idx); | |
| 1221 idx2 = uncached_name_and_type_ref_index_at(idx); | |
| 1222 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1223 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
| 1224 DBG(printf("JVM_CONSTANT_Methodref: %hd %hd", idx1, idx2)); | |
| 1225 break; | |
| 1226 } | |
| 1227 case JVM_CONSTANT_NameAndType: { | |
| 1228 idx1 = name_ref_index_at(idx); | |
| 1229 idx2 = signature_ref_index_at(idx); | |
| 1230 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1231 Bytes::put_Java_u2((address) (bytes+3), idx2); | |
| 1232 DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2)); | |
| 1233 break; | |
| 1234 } | |
| 1235 case JVM_CONSTANT_ClassIndex: { | |
| 1236 *bytes = JVM_CONSTANT_Class; | |
| 1237 idx1 = klass_index_at(idx); | |
| 1238 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1239 DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1)); | |
| 1240 break; | |
| 1241 } | |
| 1242 case JVM_CONSTANT_StringIndex: { | |
| 1243 *bytes = JVM_CONSTANT_String; | |
| 1244 idx1 = string_index_at(idx); | |
| 1245 Bytes::put_Java_u2((address) (bytes+1), idx1); | |
| 1246 DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1)); | |
| 1247 break; | |
| 1248 } | |
| 1249 } | |
| 1250 DBG(printf("\n")); | |
| 1251 bytes += ent_size; | |
| 1252 size += ent_size; | |
| 1253 } | |
| 1254 assert(size == cpool_size, "Size mismatch"); | |
| 1255 | |
| 1256 // Keep temorarily for debugging until it's stable. | |
| 1257 DBG(print_cpool_bytes(cnt, start_bytes)); | |
| 1258 return (int)(bytes - start_bytes); | |
| 1259 } /* end copy_cpool_bytes */ | |
| 1260 | |
| 1261 | |
| 1262 void SymbolHashMap::add_entry(symbolOop sym, u2 value) { | |
| 1263 char *str = sym->as_utf8(); | |
| 1264 unsigned int hash = compute_hash(str, sym->utf8_length()); | |
| 1265 unsigned int index = hash % table_size(); | |
| 1266 | |
| 1267 // check if already in map | |
| 1268 // we prefer the first entry since it is more likely to be what was used in | |
| 1269 // the class file | |
| 1270 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
| 1271 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
| 1272 if (en->hash() == hash && en->symbol() == sym) { | |
| 1273 return; // already there | |
| 1274 } | |
| 1275 } | |
| 1276 | |
| 1277 SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value); | |
| 1278 entry->set_next(bucket(index)); | |
| 1279 _buckets[index].set_entry(entry); | |
| 1280 assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
| 1281 } | |
| 1282 | |
| 1283 SymbolHashMapEntry* SymbolHashMap::find_entry(symbolOop sym) { | |
| 1284 assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL"); | |
| 1285 char *str = sym->as_utf8(); | |
| 1286 int len = sym->utf8_length(); | |
| 1287 unsigned int hash = SymbolHashMap::compute_hash(str, len); | |
| 1288 unsigned int index = hash % table_size(); | |
| 1289 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { | |
| 1290 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); | |
| 1291 if (en->hash() == hash && en->symbol() == sym) { | |
| 1292 return en; | |
| 1293 } | |
| 1294 } | |
| 1295 return NULL; | |
| 1296 } |