src/share/vm/oops/constantPool.cpp

Tue, 15 Apr 2014 17:02:20 -0400

author
coleenp
date
Tue, 15 Apr 2014 17:02:20 -0400
changeset 6626
9428a0b94204
parent 6338
53094b350323
child 6680
78bbf4d43a14
permissions
-rw-r--r--

8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool)
Summary: Keep class in CLD::_klasses list and mirror created for CDS classes if OOM during restore_shareable_info(). This keeps pointers consistent for CMS.
Reviewed-by: ehelin, stefank, jmasa, iklam

duke@435 1 /*
coleenp@4466 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
duke@435 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435 4 *
duke@435 5 * This code is free software; you can redistribute it and/or modify it
duke@435 6 * under the terms of the GNU General Public License version 2 only, as
duke@435 7 * published by the Free Software Foundation.
duke@435 8 *
duke@435 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@435 13 * accompanied this code).
duke@435 14 *
duke@435 15 * You should have received a copy of the GNU General Public License version
duke@435 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@435 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435 18 *
trims@1907 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907 20 * or visit www.oracle.com if you need additional information or have any
trims@1907 21 * questions.
duke@435 22 *
duke@435 23 */
duke@435 24
stefank@2314 25 #include "precompiled.hpp"
coleenp@4037 26 #include "classfile/classLoaderData.hpp"
stefank@2314 27 #include "classfile/javaClasses.hpp"
coleenp@4490 28 #include "classfile/metadataOnStackMark.hpp"
stefank@2314 29 #include "classfile/symbolTable.hpp"
stefank@2314 30 #include "classfile/systemDictionary.hpp"
stefank@2314 31 #include "classfile/vmSymbols.hpp"
stefank@2314 32 #include "interpreter/linkResolver.hpp"
acorn@4497 33 #include "memory/heapInspection.hpp"
coleenp@4037 34 #include "memory/metadataFactory.hpp"
stefank@2314 35 #include "memory/oopFactory.hpp"
coleenp@4037 36 #include "oops/constantPool.hpp"
stefank@2314 37 #include "oops/instanceKlass.hpp"
stefank@2314 38 #include "oops/objArrayKlass.hpp"
stefank@2314 39 #include "runtime/fieldType.hpp"
stefank@2314 40 #include "runtime/init.hpp"
coleenp@4037 41 #include "runtime/javaCalls.hpp"
stefank@2314 42 #include "runtime/signature.hpp"
stefank@2314 43 #include "runtime/vframe.hpp"
duke@435 44
coleenp@4037 45 ConstantPool* ConstantPool::allocate(ClassLoaderData* loader_data, int length, TRAPS) {
coleenp@4037 46 // Tags are RW but comment below applies to tags also.
coleenp@4037 47 Array<u1>* tags = MetadataFactory::new_writeable_array<u1>(loader_data, length, 0, CHECK_NULL);
coleenp@4037 48
coleenp@4037 49 int size = ConstantPool::size(length);
coleenp@4037 50
coleenp@4037 51 // CDS considerations:
coleenp@4037 52 // Allocate read-write but may be able to move to read-only at dumping time
coleenp@4037 53 // if all the klasses are resolved. The only other field that is writable is
coleenp@4037 54 // the resolved_references array, which is recreated at startup time.
coleenp@4037 55 // But that could be moved to InstanceKlass (although a pain to access from
coleenp@4037 56 // assembly code). Maybe it could be moved to the cpCache which is RW.
iklam@5208 57 return new (loader_data, size, false, MetaspaceObj::ConstantPoolType, THREAD) ConstantPool(tags);
coleenp@4037 58 }
coleenp@4037 59
coleenp@4037 60 ConstantPool::ConstantPool(Array<u1>* tags) {
coleenp@4037 61 set_length(tags->length());
coleenp@4037 62 set_tags(NULL);
coleenp@4037 63 set_cache(NULL);
coleenp@4037 64 set_reference_map(NULL);
coleenp@4037 65 set_resolved_references(NULL);
coleenp@4037 66 set_operands(NULL);
coleenp@4037 67 set_pool_holder(NULL);
coleenp@4037 68 set_flags(0);
coleenp@4490 69
coleenp@4037 70 // only set to non-zero if constant pool is merged by RedefineClasses
coleenp@4466 71 set_version(0);
iklam@5971 72 set_lock(new Monitor(Monitor::nonleaf + 2, "A constant pool lock"));
coleenp@4037 73
coleenp@4037 74 // initialize tag array
coleenp@4037 75 int length = tags->length();
coleenp@4037 76 for (int index = 0; index < length; index++) {
coleenp@4037 77 tags->at_put(index, JVM_CONSTANT_Invalid);
coleenp@4037 78 }
coleenp@4037 79 set_tags(tags);
coleenp@4037 80 }
coleenp@4037 81
coleenp@4037 82 void ConstantPool::deallocate_contents(ClassLoaderData* loader_data) {
coleenp@4037 83 MetadataFactory::free_metadata(loader_data, cache());
coleenp@4037 84 set_cache(NULL);
coleenp@6307 85 MetadataFactory::free_array<u2>(loader_data, reference_map());
coleenp@6307 86 set_reference_map(NULL);
coleenp@6307 87
coleenp@4037 88 MetadataFactory::free_array<jushort>(loader_data, operands());
coleenp@4037 89 set_operands(NULL);
coleenp@4037 90
coleenp@4037 91 release_C_heap_structures();
coleenp@4037 92
coleenp@4037 93 // free tag array
coleenp@4037 94 MetadataFactory::free_array<u1>(loader_data, tags());
coleenp@4037 95 set_tags(NULL);
coleenp@4037 96 }
coleenp@4037 97
coleenp@4037 98 void ConstantPool::release_C_heap_structures() {
coleenp@4037 99 // walk constant pool and decrement symbol reference counts
coleenp@4037 100 unreference_symbols();
iklam@5971 101
iklam@5971 102 delete _lock;
iklam@5971 103 set_lock(NULL);
coleenp@4037 104 }
coleenp@4037 105
coleenp@4037 106 objArrayOop ConstantPool::resolved_references() const {
coleenp@4037 107 return (objArrayOop)JNIHandles::resolve(_resolved_references);
coleenp@4037 108 }
coleenp@4037 109
coleenp@4037 110 // Create resolved_references array and mapping array for original cp indexes
coleenp@4037 111 // The ldc bytecode was rewritten to have the resolved reference array index so need a way
coleenp@4037 112 // to map it back for resolving and some unlikely miscellaneous uses.
coleenp@4037 113 // The objects created by invokedynamic are appended to this list.
coleenp@4037 114 void ConstantPool::initialize_resolved_references(ClassLoaderData* loader_data,
coleenp@4037 115 intStack reference_map,
coleenp@4037 116 int constant_pool_map_length,
coleenp@5753 117 TRAPS) {
coleenp@4037 118 // Initialized the resolved object cache.
coleenp@4037 119 int map_length = reference_map.length();
coleenp@4037 120 if (map_length > 0) {
coleenp@4037 121 // Only need mapping back to constant pool entries. The map isn't used for
coleenp@5753 122 // invokedynamic resolved_reference entries. For invokedynamic entries,
coleenp@5753 123 // the constant pool cache index has the mapping back to both the constant
coleenp@5753 124 // pool and to the resolved reference index.
coleenp@4037 125 if (constant_pool_map_length > 0) {
coleenp@5753 126 Array<u2>* om = MetadataFactory::new_array<u2>(loader_data, constant_pool_map_length, CHECK);
coleenp@4037 127
coleenp@4037 128 for (int i = 0; i < constant_pool_map_length; i++) {
coleenp@4037 129 int x = reference_map.at(i);
coleenp@4037 130 assert(x == (int)(jushort) x, "klass index is too big");
coleenp@4037 131 om->at_put(i, (jushort)x);
coleenp@4037 132 }
coleenp@4037 133 set_reference_map(om);
coleenp@4037 134 }
coleenp@4037 135
coleenp@4037 136 // Create Java array for holding resolved strings, methodHandles,
coleenp@4037 137 // methodTypes, invokedynamic and invokehandle appendix objects, etc.
coleenp@4037 138 objArrayOop stom = oopFactory::new_objArray(SystemDictionary::Object_klass(), map_length, CHECK);
coleenp@4037 139 Handle refs_handle (THREAD, (oop)stom); // must handleize.
coleenp@4037 140 set_resolved_references(loader_data->add_handle(refs_handle));
coleenp@4037 141 }
coleenp@4037 142 }
coleenp@4037 143
coleenp@4037 144 // CDS support. Create a new resolved_references array.
coleenp@4037 145 void ConstantPool::restore_unshareable_info(TRAPS) {
coleenp@4045 146
coleenp@6626 147 // Only create the new resolved references array and lock if it hasn't been
coleenp@6626 148 // attempted before
coleenp@6626 149 if (resolved_references() != NULL) return;
coleenp@6626 150
coleenp@4045 151 // restore the C++ vtable from the shared archive
coleenp@4045 152 restore_vtable();
coleenp@4045 153
coleenp@4037 154 if (SystemDictionary::Object_klass_loaded()) {
coleenp@4037 155 // Recreate the object array and add to ClassLoaderData.
coleenp@4037 156 int map_length = resolved_reference_length();
coleenp@4037 157 if (map_length > 0) {
coleenp@4037 158 objArrayOop stom = oopFactory::new_objArray(SystemDictionary::Object_klass(), map_length, CHECK);
coleenp@4037 159 Handle refs_handle (THREAD, (oop)stom); // must handleize.
coleenp@4037 160
coleenp@4037 161 ClassLoaderData* loader_data = pool_holder()->class_loader_data();
coleenp@4037 162 set_resolved_references(loader_data->add_handle(refs_handle));
coleenp@4037 163 }
iklam@5971 164
iklam@5971 165 // Also need to recreate the mutex. Make sure this matches the constructor
iklam@5971 166 set_lock(new Monitor(Monitor::nonleaf + 2, "A constant pool lock"));
coleenp@4037 167 }
coleenp@4037 168 }
coleenp@4037 169
coleenp@4037 170 void ConstantPool::remove_unshareable_info() {
coleenp@4037 171 // Resolved references are not in the shared archive.
coleenp@4037 172 // Save the length for restoration. It is not necessarily the same length
coleenp@4037 173 // as reference_map.length() if invokedynamic is saved.
coleenp@4037 174 set_resolved_reference_length(
coleenp@4037 175 resolved_references() != NULL ? resolved_references()->length() : 0);
coleenp@4037 176 set_resolved_references(NULL);
iklam@5971 177 set_lock(NULL);
coleenp@4037 178 }
coleenp@4037 179
coleenp@4037 180 int ConstantPool::cp_to_object_index(int cp_index) {
coleenp@4037 181 // this is harder don't do this so much.
coleenp@5753 182 int i = reference_map()->find(cp_index);
coleenp@5753 183 // We might not find the index for jsr292 call.
coleenp@5753 184 return (i < 0) ? _no_index_sentinel : i;
coleenp@4037 185 }
coleenp@4037 186
coleenp@4037 187 Klass* ConstantPool::klass_at_impl(constantPoolHandle this_oop, int which, TRAPS) {
coleenp@4037 188 // A resolved constantPool entry will contain a Klass*, otherwise a Symbol*.
duke@435 189 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and
duke@435 190 // tag is not updated atomicly.
coleenp@4037 191
coleenp@2497 192 CPSlot entry = this_oop->slot_at(which);
coleenp@4037 193 if (entry.is_resolved()) {
coleenp@4037 194 assert(entry.get_klass()->is_klass(), "must be");
duke@435 195 // Already resolved - return entry.
coleenp@4037 196 return entry.get_klass();
duke@435 197 }
duke@435 198
duke@435 199 // Acquire lock on constant oop while doing update. After we get the lock, we check if another object
duke@435 200 // already has updated the object
duke@435 201 assert(THREAD->is_Java_thread(), "must be a Java thread");
duke@435 202 bool do_resolve = false;
duke@435 203 bool in_error = false;
duke@435 204
coleenp@4037 205 // Create a handle for the mirror. This will preserve the resolved class
coleenp@4037 206 // until the loader_data is registered.
coleenp@4037 207 Handle mirror_handle;
coleenp@4037 208
coleenp@2497 209 Symbol* name = NULL;
duke@435 210 Handle loader;
iklam@5971 211 { MonitorLockerEx ml(this_oop->lock());
duke@435 212
duke@435 213 if (this_oop->tag_at(which).is_unresolved_klass()) {
duke@435 214 if (this_oop->tag_at(which).is_unresolved_klass_in_error()) {
duke@435 215 in_error = true;
duke@435 216 } else {
duke@435 217 do_resolve = true;
coleenp@2497 218 name = this_oop->unresolved_klass_at(which);
coleenp@4251 219 loader = Handle(THREAD, this_oop->pool_holder()->class_loader());
duke@435 220 }
duke@435 221 }
duke@435 222 } // unlocking constantPool
duke@435 223
duke@435 224
duke@435 225 // The original attempt to resolve this constant pool entry failed so find the
duke@435 226 // original error and throw it again (JVMS 5.4.3).
duke@435 227 if (in_error) {
coleenp@2497 228 Symbol* error = SystemDictionary::find_resolution_error(this_oop, which);
coleenp@2497 229 guarantee(error != (Symbol*)NULL, "tag mismatch with resolution error table");
duke@435 230 ResourceMark rm;
duke@435 231 // exception text will be the class name
duke@435 232 const char* className = this_oop->unresolved_klass_at(which)->as_C_string();
duke@435 233 THROW_MSG_0(error, className);
duke@435 234 }
duke@435 235
duke@435 236 if (do_resolve) {
duke@435 237 // this_oop must be unlocked during resolve_or_fail
coleenp@4251 238 oop protection_domain = this_oop->pool_holder()->protection_domain();
duke@435 239 Handle h_prot (THREAD, protection_domain);
coleenp@4037 240 Klass* k_oop = SystemDictionary::resolve_or_fail(name, loader, h_prot, true, THREAD);
duke@435 241 KlassHandle k;
duke@435 242 if (!HAS_PENDING_EXCEPTION) {
duke@435 243 k = KlassHandle(THREAD, k_oop);
coleenp@4037 244 // preserve the resolved klass.
coleenp@4037 245 mirror_handle = Handle(THREAD, k_oop->java_mirror());
duke@435 246 // Do access check for klasses
duke@435 247 verify_constant_pool_resolve(this_oop, k, THREAD);
duke@435 248 }
duke@435 249
duke@435 250 // Failed to resolve class. We must record the errors so that subsequent attempts
duke@435 251 // to resolve this constant pool entry fail with the same error (JVMS 5.4.3).
duke@435 252 if (HAS_PENDING_EXCEPTION) {
duke@435 253 ResourceMark rm;
coleenp@4037 254 Symbol* error = PENDING_EXCEPTION->klass()->name();
duke@435 255
duke@435 256 bool throw_orig_error = false;
duke@435 257 {
iklam@5971 258 MonitorLockerEx ml(this_oop->lock());
duke@435 259
duke@435 260 // some other thread has beaten us and has resolved the class.
duke@435 261 if (this_oop->tag_at(which).is_klass()) {
duke@435 262 CLEAR_PENDING_EXCEPTION;
duke@435 263 entry = this_oop->resolved_klass_at(which);
coleenp@4037 264 return entry.get_klass();
duke@435 265 }
duke@435 266
duke@435 267 if (!PENDING_EXCEPTION->
never@1577 268 is_a(SystemDictionary::LinkageError_klass())) {
duke@435 269 // Just throw the exception and don't prevent these classes from
duke@435 270 // being loaded due to virtual machine errors like StackOverflow
duke@435 271 // and OutOfMemoryError, etc, or if the thread was hit by stop()
duke@435 272 // Needs clarification to section 5.4.3 of the VM spec (see 6308271)
duke@435 273 }
duke@435 274 else if (!this_oop->tag_at(which).is_unresolved_klass_in_error()) {
duke@435 275 SystemDictionary::add_resolution_error(this_oop, which, error);
duke@435 276 this_oop->tag_at_put(which, JVM_CONSTANT_UnresolvedClassInError);
duke@435 277 } else {
duke@435 278 // some other thread has put the class in error state.
coleenp@2497 279 error = SystemDictionary::find_resolution_error(this_oop, which);
coleenp@2497 280 assert(error != NULL, "checking");
duke@435 281 throw_orig_error = true;
duke@435 282 }
duke@435 283 } // unlocked
duke@435 284
duke@435 285 if (throw_orig_error) {
duke@435 286 CLEAR_PENDING_EXCEPTION;
duke@435 287 ResourceMark rm;
duke@435 288 const char* className = this_oop->unresolved_klass_at(which)->as_C_string();
duke@435 289 THROW_MSG_0(error, className);
duke@435 290 }
duke@435 291
duke@435 292 return 0;
duke@435 293 }
duke@435 294
coleenp@4037 295 if (TraceClassResolution && !k()->oop_is_array()) {
duke@435 296 // skip resolving the constant pool so that this code get's
duke@435 297 // called the next time some bytecodes refer to this class.
duke@435 298 ResourceMark rm;
duke@435 299 int line_number = -1;
duke@435 300 const char * source_file = NULL;
duke@435 301 if (JavaThread::current()->has_last_Java_frame()) {
duke@435 302 // try to identify the method which called this function.
duke@435 303 vframeStream vfst(JavaThread::current());
duke@435 304 if (!vfst.at_end()) {
duke@435 305 line_number = vfst.method()->line_number_from_bci(vfst.bci());
coleenp@4251 306 Symbol* s = vfst.method()->method_holder()->source_file_name();
duke@435 307 if (s != NULL) {
duke@435 308 source_file = s->as_C_string();
duke@435 309 }
duke@435 310 }
duke@435 311 }
duke@435 312 if (k() != this_oop->pool_holder()) {
duke@435 313 // only print something if the classes are different
duke@435 314 if (source_file != NULL) {
duke@435 315 tty->print("RESOLVE %s %s %s:%d\n",
coleenp@4251 316 this_oop->pool_holder()->external_name(),
coleenp@4037 317 InstanceKlass::cast(k())->external_name(), source_file, line_number);
duke@435 318 } else {
duke@435 319 tty->print("RESOLVE %s %s\n",
coleenp@4251 320 this_oop->pool_holder()->external_name(),
coleenp@4037 321 InstanceKlass::cast(k())->external_name());
duke@435 322 }
duke@435 323 }
duke@435 324 return k();
duke@435 325 } else {
iklam@5971 326 MonitorLockerEx ml(this_oop->lock());
duke@435 327 // Only updated constant pool - if it is resolved.
duke@435 328 do_resolve = this_oop->tag_at(which).is_unresolved_klass();
duke@435 329 if (do_resolve) {
coleenp@4251 330 ClassLoaderData* this_key = this_oop->pool_holder()->class_loader_data();
coleenp@4304 331 this_key->record_dependency(k(), CHECK_NULL); // Can throw OOM
duke@435 332 this_oop->klass_at_put(which, k());
duke@435 333 }
duke@435 334 }
duke@435 335 }
duke@435 336
duke@435 337 entry = this_oop->resolved_klass_at(which);
coleenp@4037 338 assert(entry.is_resolved() && entry.get_klass()->is_klass(), "must be resolved at this point");
coleenp@4037 339 return entry.get_klass();
duke@435 340 }
duke@435 341
duke@435 342
coleenp@4037 343 // Does not update ConstantPool* - to avoid any exception throwing. Used
duke@435 344 // by compiler and exception handling. Also used to avoid classloads for
duke@435 345 // instanceof operations. Returns NULL if the class has not been loaded or
duke@435 346 // if the verification of constant pool failed
coleenp@4037 347 Klass* ConstantPool::klass_at_if_loaded(constantPoolHandle this_oop, int which) {
coleenp@2497 348 CPSlot entry = this_oop->slot_at(which);
coleenp@4037 349 if (entry.is_resolved()) {
coleenp@4037 350 assert(entry.get_klass()->is_klass(), "must be");
coleenp@4037 351 return entry.get_klass();
duke@435 352 } else {
coleenp@4037 353 assert(entry.is_unresolved(), "must be either symbol or klass");
duke@435 354 Thread *thread = Thread::current();
coleenp@2497 355 Symbol* name = entry.get_symbol();
coleenp@4251 356 oop loader = this_oop->pool_holder()->class_loader();
coleenp@4251 357 oop protection_domain = this_oop->pool_holder()->protection_domain();
duke@435 358 Handle h_prot (thread, protection_domain);
duke@435 359 Handle h_loader (thread, loader);
coleenp@4037 360 Klass* k = SystemDictionary::find(name, h_loader, h_prot, thread);
duke@435 361
duke@435 362 if (k != NULL) {
duke@435 363 // Make sure that resolving is legal
duke@435 364 EXCEPTION_MARK;
duke@435 365 KlassHandle klass(THREAD, k);
duke@435 366 // return NULL if verification fails
duke@435 367 verify_constant_pool_resolve(this_oop, klass, THREAD);
duke@435 368 if (HAS_PENDING_EXCEPTION) {
duke@435 369 CLEAR_PENDING_EXCEPTION;
duke@435 370 return NULL;
duke@435 371 }
duke@435 372 return klass();
duke@435 373 } else {
duke@435 374 return k;
duke@435 375 }
duke@435 376 }
duke@435 377 }
duke@435 378
duke@435 379
coleenp@4037 380 Klass* ConstantPool::klass_ref_at_if_loaded(constantPoolHandle this_oop, int which) {
duke@435 381 return klass_at_if_loaded(this_oop, this_oop->klass_ref_index_at(which));
duke@435 382 }
duke@435 383
duke@435 384
coleenp@4037 385 Method* ConstantPool::method_at_if_loaded(constantPoolHandle cpool,
twisti@3969 386 int which) {
brutisso@3489 387 if (cpool->cache() == NULL) return NULL; // nothing to load yet
coleenp@4037 388 int cache_index = decode_cpcache_index(which, true);
jrose@2982 389 if (!(cache_index >= 0 && cache_index < cpool->cache()->length())) {
coleenp@4037 390 // FIXME: should be an assert
jrose@2982 391 if (PrintMiscellaneous && (Verbose||WizardMode)) {
twisti@3969 392 tty->print_cr("bad operand %d in:", which); cpool->print();
jrose@2982 393 }
jrose@2982 394 return NULL;
jrose@2982 395 }
jrose@2982 396 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
twisti@3969 397 return e->method_if_resolved(cpool);
twisti@3969 398 }
twisti@3969 399
twisti@3969 400
coleenp@4037 401 bool ConstantPool::has_appendix_at_if_loaded(constantPoolHandle cpool, int which) {
twisti@3969 402 if (cpool->cache() == NULL) return false; // nothing to load yet
coleenp@4037 403 int cache_index = decode_cpcache_index(which, true);
coleenp@4037 404 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
twisti@3969 405 return e->has_appendix();
twisti@3969 406 }
twisti@3969 407
coleenp@4037 408 oop ConstantPool::appendix_at_if_loaded(constantPoolHandle cpool, int which) {
twisti@3969 409 if (cpool->cache() == NULL) return NULL; // nothing to load yet
coleenp@4037 410 int cache_index = decode_cpcache_index(which, true);
coleenp@4037 411 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
coleenp@4037 412 return e->appendix_if_resolved(cpool);
jrose@2982 413 }
jrose@2982 414
jrose@2982 415
twisti@4133 416 bool ConstantPool::has_method_type_at_if_loaded(constantPoolHandle cpool, int which) {
twisti@4133 417 if (cpool->cache() == NULL) return false; // nothing to load yet
twisti@4133 418 int cache_index = decode_cpcache_index(which, true);
twisti@4133 419 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
twisti@4133 420 return e->has_method_type();
twisti@4133 421 }
twisti@4133 422
twisti@4133 423 oop ConstantPool::method_type_at_if_loaded(constantPoolHandle cpool, int which) {
twisti@4133 424 if (cpool->cache() == NULL) return NULL; // nothing to load yet
twisti@4133 425 int cache_index = decode_cpcache_index(which, true);
twisti@4133 426 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
twisti@4133 427 return e->method_type_if_resolved(cpool);
twisti@4133 428 }
twisti@4133 429
twisti@4133 430
coleenp@4037 431 Symbol* ConstantPool::impl_name_ref_at(int which, bool uncached) {
jrose@1161 432 int name_index = name_ref_index_at(impl_name_and_type_ref_index_at(which, uncached));
duke@435 433 return symbol_at(name_index);
duke@435 434 }
duke@435 435
duke@435 436
coleenp@4037 437 Symbol* ConstantPool::impl_signature_ref_at(int which, bool uncached) {
jrose@1161 438 int signature_index = signature_ref_index_at(impl_name_and_type_ref_index_at(which, uncached));
duke@435 439 return symbol_at(signature_index);
duke@435 440 }
duke@435 441
duke@435 442
coleenp@4037 443 int ConstantPool::impl_name_and_type_ref_index_at(int which, bool uncached) {
jrose@1494 444 int i = which;
jrose@1494 445 if (!uncached && cache() != NULL) {
coleenp@4037 446 if (ConstantPool::is_invokedynamic_index(which)) {
coleenp@4037 447 // Invokedynamic index is index into resolved_references
coleenp@4037 448 int pool_index = invokedynamic_cp_cache_entry_at(which)->constant_pool_index();
jrose@2742 449 pool_index = invoke_dynamic_name_and_type_ref_index_at(pool_index);
jrose@2015 450 assert(tag_at(pool_index).is_name_and_type(), "");
jrose@2015 451 return pool_index;
jrose@2015 452 }
jrose@1494 453 // change byte-ordering and go via cache
jrose@1494 454 i = remap_instruction_operand_from_cache(which);
jrose@1494 455 } else {
jrose@2268 456 if (tag_at(which).is_invoke_dynamic()) {
jrose@2268 457 int pool_index = invoke_dynamic_name_and_type_ref_index_at(which);
jrose@2268 458 assert(tag_at(pool_index).is_name_and_type(), "");
jrose@2268 459 return pool_index;
jrose@2268 460 }
jrose@1494 461 }
jrose@1494 462 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool");
jrose@2268 463 assert(!tag_at(i).is_invoke_dynamic(), "Must be handled above");
jrose@1494 464 jint ref_index = *int_at_addr(i);
duke@435 465 return extract_high_short_from_int(ref_index);
duke@435 466 }
duke@435 467
duke@435 468
coleenp@4037 469 int ConstantPool::impl_klass_ref_index_at(int which, bool uncached) {
coleenp@4037 470 guarantee(!ConstantPool::is_invokedynamic_index(which),
jrose@1494 471 "an invokedynamic instruction does not have a klass");
jrose@1494 472 int i = which;
jrose@1494 473 if (!uncached && cache() != NULL) {
jrose@1494 474 // change byte-ordering and go via cache
jrose@1494 475 i = remap_instruction_operand_from_cache(which);
jrose@1494 476 }
jrose@1494 477 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool");
jrose@1494 478 jint ref_index = *int_at_addr(i);
duke@435 479 return extract_low_short_from_int(ref_index);
duke@435 480 }
duke@435 481
duke@435 482
jrose@1161 483
coleenp@4037 484 int ConstantPool::remap_instruction_operand_from_cache(int operand) {
jrose@1920 485 int cpc_index = operand;
jrose@1920 486 DEBUG_ONLY(cpc_index -= CPCACHE_INDEX_TAG);
jrose@1920 487 assert((int)(u2)cpc_index == cpc_index, "clean u2");
jrose@1494 488 int member_index = cache()->entry_at(cpc_index)->constant_pool_index();
jrose@1494 489 return member_index;
jrose@1161 490 }
jrose@1161 491
jrose@1161 492
coleenp@4037 493 void ConstantPool::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) {
duke@435 494 if (k->oop_is_instance() || k->oop_is_objArray()) {
duke@435 495 instanceKlassHandle holder (THREAD, this_oop->pool_holder());
coleenp@4142 496 Klass* elem_oop = k->oop_is_instance() ? k() : ObjArrayKlass::cast(k())->bottom_klass();
duke@435 497 KlassHandle element (THREAD, elem_oop);
duke@435 498
duke@435 499 // The element type could be a typeArray - we only need the access check if it is
duke@435 500 // an reference to another class
duke@435 501 if (element->oop_is_instance()) {
duke@435 502 LinkResolver::check_klass_accessability(holder, element, CHECK);
duke@435 503 }
duke@435 504 }
duke@435 505 }
duke@435 506
duke@435 507
coleenp@4037 508 int ConstantPool::name_ref_index_at(int which_nt) {
jrose@1161 509 jint ref_index = name_and_type_at(which_nt);
duke@435 510 return extract_low_short_from_int(ref_index);
duke@435 511 }
duke@435 512
duke@435 513
coleenp@4037 514 int ConstantPool::signature_ref_index_at(int which_nt) {
jrose@1161 515 jint ref_index = name_and_type_at(which_nt);
duke@435 516 return extract_high_short_from_int(ref_index);
duke@435 517 }
duke@435 518
duke@435 519
coleenp@4037 520 Klass* ConstantPool::klass_ref_at(int which, TRAPS) {
duke@435 521 return klass_at(klass_ref_index_at(which), CHECK_NULL);
duke@435 522 }
duke@435 523
duke@435 524
coleenp@4037 525 Symbol* ConstantPool::klass_name_at(int which) {
duke@435 526 assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(),
duke@435 527 "Corrupted constant pool");
coleenp@4037 528 // A resolved constantPool entry will contain a Klass*, otherwise a Symbol*.
duke@435 529 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and
duke@435 530 // tag is not updated atomicly.
coleenp@2497 531 CPSlot entry = slot_at(which);
coleenp@4037 532 if (entry.is_resolved()) {
duke@435 533 // Already resolved - return entry's name.
coleenp@4037 534 assert(entry.get_klass()->is_klass(), "must be");
coleenp@4037 535 return entry.get_klass()->name();
duke@435 536 } else {
coleenp@4037 537 assert(entry.is_unresolved(), "must be either symbol or klass");
coleenp@2497 538 return entry.get_symbol();
duke@435 539 }
duke@435 540 }
duke@435 541
coleenp@4037 542 Symbol* ConstantPool::klass_ref_at_noresolve(int which) {
duke@435 543 jint ref_index = klass_ref_index_at(which);
duke@435 544 return klass_at_noresolve(ref_index);
duke@435 545 }
duke@435 546
coleenp@4037 547 Symbol* ConstantPool::uncached_klass_ref_at_noresolve(int which) {
jrose@1957 548 jint ref_index = uncached_klass_ref_index_at(which);
jrose@1957 549 return klass_at_noresolve(ref_index);
jrose@1957 550 }
jrose@1957 551
coleenp@4037 552 char* ConstantPool::string_at_noresolve(int which) {
coleenp@4037 553 Symbol* s = unresolved_string_at(which);
coleenp@4037 554 if (s == NULL) {
coleenp@4037 555 return (char*)"<pseudo-string>";
duke@435 556 } else {
coleenp@4037 557 return unresolved_string_at(which)->as_C_string();
duke@435 558 }
duke@435 559 }
duke@435 560
coleenp@4037 561 BasicType ConstantPool::basic_type_for_signature_at(int which) {
duke@435 562 return FieldType::basic_type(symbol_at(which));
duke@435 563 }
duke@435 564
duke@435 565
coleenp@4037 566 void ConstantPool::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) {
duke@435 567 for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused
coleenp@4037 568 if (this_oop->tag_at(index).is_string()) {
duke@435 569 this_oop->string_at(index, CHECK);
duke@435 570 }
duke@435 571 }
duke@435 572 }
duke@435 573
coleenp@4037 574 // Resolve all the classes in the constant pool. If they are all resolved,
coleenp@4037 575 // the constant pool is read-only. Enhancement: allocate cp entries to
coleenp@4037 576 // another metaspace, and copy to read-only or read-write space if this
coleenp@4037 577 // bit is set.
coleenp@4037 578 bool ConstantPool::resolve_class_constants(TRAPS) {
coleenp@4037 579 constantPoolHandle cp(THREAD, this);
coleenp@4037 580 for (int index = 1; index < length(); index++) { // Index 0 is unused
coleenp@4037 581 if (tag_at(index).is_unresolved_klass() &&
coleenp@4037 582 klass_at_if_loaded(cp, index) == NULL) {
coleenp@4037 583 return false;
jrose@2268 584 }
coleenp@4037 585 }
coleenp@4037 586 // set_preresolution(); or some bit for future use
coleenp@4037 587 return true;
jrose@2268 588 }
jrose@2268 589
coleenp@4037 590 // If resolution for MethodHandle or MethodType fails, save the exception
coleenp@4037 591 // in the resolution error table, so that the same exception is thrown again.
coleenp@4037 592 void ConstantPool::save_and_throw_exception(constantPoolHandle this_oop, int which,
coleenp@4037 593 int tag, TRAPS) {
coleenp@4037 594 ResourceMark rm;
coleenp@4037 595 Symbol* error = PENDING_EXCEPTION->klass()->name();
iklam@5971 596 MonitorLockerEx ml(this_oop->lock()); // lock cpool to change tag.
coleenp@4037 597
coleenp@4037 598 int error_tag = (tag == JVM_CONSTANT_MethodHandle) ?
coleenp@4037 599 JVM_CONSTANT_MethodHandleInError : JVM_CONSTANT_MethodTypeInError;
coleenp@4037 600
coleenp@4037 601 if (!PENDING_EXCEPTION->
coleenp@4037 602 is_a(SystemDictionary::LinkageError_klass())) {
coleenp@4037 603 // Just throw the exception and don't prevent these classes from
coleenp@4037 604 // being loaded due to virtual machine errors like StackOverflow
coleenp@4037 605 // and OutOfMemoryError, etc, or if the thread was hit by stop()
coleenp@4037 606 // Needs clarification to section 5.4.3 of the VM spec (see 6308271)
coleenp@4037 607
coleenp@4037 608 } else if (this_oop->tag_at(which).value() != error_tag) {
coleenp@4037 609 SystemDictionary::add_resolution_error(this_oop, which, error);
coleenp@4037 610 this_oop->tag_at_put(which, error_tag);
coleenp@4037 611 } else {
coleenp@4037 612 // some other thread has put the class in error state.
coleenp@4037 613 error = SystemDictionary::find_resolution_error(this_oop, which);
coleenp@4037 614 assert(error != NULL, "checking");
coleenp@4037 615 CLEAR_PENDING_EXCEPTION;
coleenp@4037 616 THROW_MSG(error, "");
coleenp@4037 617 }
coleenp@4037 618 }
coleenp@4037 619
coleenp@4037 620
coleenp@4037 621 // Called to resolve constants in the constant pool and return an oop.
coleenp@4037 622 // Some constant pool entries cache their resolved oop. This is also
coleenp@4037 623 // called to create oops from constants to use in arguments for invokedynamic
coleenp@4037 624 oop ConstantPool::resolve_constant_at_impl(constantPoolHandle this_oop, int index, int cache_index, TRAPS) {
jrose@1957 625 oop result_oop = NULL;
jrose@2268 626 Handle throw_exception;
jrose@2268 627
jrose@2268 628 if (cache_index == _possible_index_sentinel) {
coleenp@4037 629 // It is possible that this constant is one which is cached in the objects.
jrose@2268 630 // We'll do a linear search. This should be OK because this usage is rare.
jrose@2268 631 assert(index > 0, "valid index");
coleenp@4037 632 cache_index = this_oop->cp_to_object_index(index);
jrose@2268 633 }
jrose@2268 634 assert(cache_index == _no_index_sentinel || cache_index >= 0, "");
jrose@2268 635 assert(index == _no_index_sentinel || index >= 0, "");
jrose@2268 636
jrose@1957 637 if (cache_index >= 0) {
coleenp@4037 638 result_oop = this_oop->resolved_references()->obj_at(cache_index);
jrose@1957 639 if (result_oop != NULL) {
coleenp@4037 640 return result_oop;
jrose@2268 641 // That was easy...
jrose@1957 642 }
coleenp@4037 643 index = this_oop->object_to_cp_index(cache_index);
jrose@1957 644 }
jrose@1957 645
jrose@2268 646 jvalue prim_value; // temp used only in a few cases below
jrose@2268 647
jrose@1957 648 int tag_value = this_oop->tag_at(index).value();
coleenp@4037 649
jrose@1957 650 switch (tag_value) {
jrose@1957 651
jrose@1957 652 case JVM_CONSTANT_UnresolvedClass:
jrose@1957 653 case JVM_CONSTANT_UnresolvedClassInError:
jrose@1957 654 case JVM_CONSTANT_Class:
jrose@1957 655 {
coleenp@4037 656 assert(cache_index == _no_index_sentinel, "should not have been set");
coleenp@4037 657 Klass* resolved = klass_at_impl(this_oop, index, CHECK_NULL);
jrose@1957 658 // ldc wants the java mirror.
never@2658 659 result_oop = resolved->java_mirror();
jrose@1957 660 break;
jrose@1957 661 }
jrose@1957 662
jrose@1957 663 case JVM_CONSTANT_String:
coleenp@4037 664 assert(cache_index != _no_index_sentinel, "should have been set");
jrose@1957 665 if (this_oop->is_pseudo_string_at(index)) {
coleenp@4037 666 result_oop = this_oop->pseudo_string_at(index, cache_index);
jrose@1957 667 break;
jrose@1957 668 }
coleenp@4037 669 result_oop = string_at_impl(this_oop, index, cache_index, CHECK_NULL);
jrose@1957 670 break;
jrose@1957 671
coleenp@4037 672 case JVM_CONSTANT_MethodHandleInError:
coleenp@4037 673 case JVM_CONSTANT_MethodTypeInError:
coleenp@4037 674 {
coleenp@4037 675 Symbol* error = SystemDictionary::find_resolution_error(this_oop, index);
coleenp@4037 676 guarantee(error != (Symbol*)NULL, "tag mismatch with resolution error table");
coleenp@4037 677 ResourceMark rm;
coleenp@4037 678 THROW_MSG_0(error, "");
coleenp@4037 679 break;
coleenp@4037 680 }
coleenp@4037 681
jrose@1957 682 case JVM_CONSTANT_MethodHandle:
jrose@1957 683 {
jrose@1957 684 int ref_kind = this_oop->method_handle_ref_kind_at(index);
jrose@1957 685 int callee_index = this_oop->method_handle_klass_index_at(index);
coleenp@2497 686 Symbol* name = this_oop->method_handle_name_ref_at(index);
coleenp@2497 687 Symbol* signature = this_oop->method_handle_signature_ref_at(index);
jrose@1957 688 if (PrintMiscellaneous)
jrose@1957 689 tty->print_cr("resolve JVM_CONSTANT_MethodHandle:%d [%d/%d/%d] %s.%s",
jrose@1957 690 ref_kind, index, this_oop->method_handle_index_at(index),
jrose@1957 691 callee_index, name->as_C_string(), signature->as_C_string());
jrose@1957 692 KlassHandle callee;
coleenp@4037 693 { Klass* k = klass_at_impl(this_oop, callee_index, CHECK_NULL);
jrose@1957 694 callee = KlassHandle(THREAD, k);
jrose@1957 695 }
jrose@1957 696 KlassHandle klass(THREAD, this_oop->pool_holder());
jrose@1957 697 Handle value = SystemDictionary::link_method_handle_constant(klass, ref_kind,
jrose@1957 698 callee, name, signature,
jrose@2268 699 THREAD);
coleenp@4037 700 result_oop = value();
jrose@2268 701 if (HAS_PENDING_EXCEPTION) {
coleenp@4037 702 save_and_throw_exception(this_oop, index, tag_value, CHECK_NULL);
jrose@2268 703 }
jrose@1957 704 break;
jrose@1957 705 }
jrose@1957 706
jrose@1957 707 case JVM_CONSTANT_MethodType:
jrose@1957 708 {
coleenp@2497 709 Symbol* signature = this_oop->method_type_signature_at(index);
jrose@1957 710 if (PrintMiscellaneous)
jrose@1957 711 tty->print_cr("resolve JVM_CONSTANT_MethodType [%d/%d] %s",
jrose@1957 712 index, this_oop->method_type_index_at(index),
jrose@1957 713 signature->as_C_string());
jrose@1957 714 KlassHandle klass(THREAD, this_oop->pool_holder());
twisti@3969 715 Handle value = SystemDictionary::find_method_handle_type(signature, klass, THREAD);
coleenp@4037 716 result_oop = value();
jrose@2268 717 if (HAS_PENDING_EXCEPTION) {
coleenp@4037 718 save_and_throw_exception(this_oop, index, tag_value, CHECK_NULL);
jrose@2268 719 }
jrose@1957 720 break;
jrose@1957 721 }
jrose@1957 722
jrose@1957 723 case JVM_CONSTANT_Integer:
coleenp@4037 724 assert(cache_index == _no_index_sentinel, "should not have been set");
jrose@2268 725 prim_value.i = this_oop->int_at(index);
jrose@2268 726 result_oop = java_lang_boxing_object::create(T_INT, &prim_value, CHECK_NULL);
jrose@2268 727 break;
jrose@2268 728
jrose@1957 729 case JVM_CONSTANT_Float:
coleenp@4037 730 assert(cache_index == _no_index_sentinel, "should not have been set");
jrose@2268 731 prim_value.f = this_oop->float_at(index);
jrose@2268 732 result_oop = java_lang_boxing_object::create(T_FLOAT, &prim_value, CHECK_NULL);
jrose@2268 733 break;
jrose@2268 734
jrose@1957 735 case JVM_CONSTANT_Long:
coleenp@4037 736 assert(cache_index == _no_index_sentinel, "should not have been set");
jrose@2268 737 prim_value.j = this_oop->long_at(index);
jrose@2268 738 result_oop = java_lang_boxing_object::create(T_LONG, &prim_value, CHECK_NULL);
jrose@2268 739 break;
jrose@2268 740
jrose@1957 741 case JVM_CONSTANT_Double:
coleenp@4037 742 assert(cache_index == _no_index_sentinel, "should not have been set");
jrose@2268 743 prim_value.d = this_oop->double_at(index);
jrose@2268 744 result_oop = java_lang_boxing_object::create(T_DOUBLE, &prim_value, CHECK_NULL);
jrose@1957 745 break;
jrose@1957 746
jrose@1957 747 default:
jrose@1957 748 DEBUG_ONLY( tty->print_cr("*** %p: tag at CP[%d/%d] = %d",
jrose@1957 749 this_oop(), index, cache_index, tag_value) );
jrose@1957 750 assert(false, "unexpected constant tag");
jrose@1957 751 break;
jrose@1957 752 }
jrose@1957 753
jrose@1957 754 if (cache_index >= 0) {
jrose@1957 755 // Cache the oop here also.
jrose@2268 756 Handle result_handle(THREAD, result_oop);
iklam@5971 757 MonitorLockerEx ml(this_oop->lock()); // don't know if we really need this
coleenp@4037 758 oop result = this_oop->resolved_references()->obj_at(cache_index);
coleenp@4037 759 // Benign race condition: resolved_references may already be filled in while we were trying to lock.
jrose@2268 760 // The important thing here is that all threads pick up the same result.
jrose@2268 761 // It doesn't matter which racing thread wins, as long as only one
jrose@2268 762 // result is used by all threads, and all future queries.
jrose@2268 763 // That result may be either a resolved constant or a failure exception.
coleenp@4037 764 if (result == NULL) {
coleenp@4037 765 this_oop->resolved_references()->obj_at_put(cache_index, result_handle());
coleenp@4037 766 return result_handle();
coleenp@4037 767 } else {
coleenp@4037 768 // Return the winning thread's result. This can be different than
coleenp@4037 769 // result_handle() for MethodHandles.
coleenp@4037 770 return result;
jrose@1957 771 }
jrose@1957 772 } else {
jrose@1957 773 return result_oop;
jrose@1957 774 }
jrose@1957 775 }
jrose@1957 776
coleenp@4037 777 oop ConstantPool::uncached_string_at(int which, TRAPS) {
coleenp@4037 778 Symbol* sym = unresolved_string_at(which);
coleenp@4037 779 oop str = StringTable::intern(sym, CHECK_(NULL));
coleenp@4037 780 assert(java_lang_String::is_instance(str), "must be string");
coleenp@4037 781 return str;
coleenp@4037 782 }
twisti@3969 783
coleenp@4037 784
coleenp@4037 785 oop ConstantPool::resolve_bootstrap_specifier_at_impl(constantPoolHandle this_oop, int index, TRAPS) {
twisti@3969 786 assert(this_oop->tag_at(index).is_invoke_dynamic(), "Corrupted constant pool");
twisti@3969 787
twisti@3969 788 Handle bsm;
twisti@3969 789 int argc;
twisti@3969 790 {
twisti@3969 791 // JVM_CONSTANT_InvokeDynamic is an ordered pair of [bootm, name&type], plus optional arguments
twisti@3969 792 // The bootm, being a JVM_CONSTANT_MethodHandle, has its own cache entry.
twisti@3969 793 // It is accompanied by the optional arguments.
twisti@3969 794 int bsm_index = this_oop->invoke_dynamic_bootstrap_method_ref_index_at(index);
twisti@3969 795 oop bsm_oop = this_oop->resolve_possibly_cached_constant_at(bsm_index, CHECK_NULL);
twisti@3969 796 if (!java_lang_invoke_MethodHandle::is_instance(bsm_oop)) {
twisti@3969 797 THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "BSM not an MethodHandle");
twisti@3969 798 }
twisti@3969 799
twisti@3969 800 // Extract the optional static arguments.
twisti@3969 801 argc = this_oop->invoke_dynamic_argument_count_at(index);
twisti@3969 802 if (argc == 0) return bsm_oop;
twisti@3969 803
twisti@3969 804 bsm = Handle(THREAD, bsm_oop);
twisti@3969 805 }
twisti@3969 806
twisti@3969 807 objArrayHandle info;
twisti@3969 808 {
twisti@3969 809 objArrayOop info_oop = oopFactory::new_objArray(SystemDictionary::Object_klass(), 1+argc, CHECK_NULL);
twisti@3969 810 info = objArrayHandle(THREAD, info_oop);
twisti@3969 811 }
twisti@3969 812
twisti@3969 813 info->obj_at_put(0, bsm());
twisti@3969 814 for (int i = 0; i < argc; i++) {
twisti@3969 815 int arg_index = this_oop->invoke_dynamic_argument_index_at(index, i);
twisti@3969 816 oop arg_oop = this_oop->resolve_possibly_cached_constant_at(arg_index, CHECK_NULL);
twisti@3969 817 info->obj_at_put(1+i, arg_oop);
twisti@3969 818 }
twisti@3969 819
twisti@3969 820 return info();
twisti@3969 821 }
twisti@3969 822
coleenp@4037 823 oop ConstantPool::string_at_impl(constantPoolHandle this_oop, int which, int obj_index, TRAPS) {
coleenp@4037 824 // If the string has already been interned, this entry will be non-null
coleenp@4037 825 oop str = this_oop->resolved_references()->obj_at(obj_index);
coleenp@4037 826 if (str != NULL) return str;
coleenp@5753 827 Symbol* sym = this_oop->unresolved_string_at(which);
coleenp@4037 828 str = StringTable::intern(sym, CHECK_(NULL));
coleenp@4037 829 this_oop->string_at_put(which, obj_index, str);
coleenp@2497 830 assert(java_lang_String::is_instance(str), "must be string");
coleenp@2497 831 return str;
duke@435 832 }
duke@435 833
duke@435 834
coleenp@4037 835 bool ConstantPool::klass_name_at_matches(instanceKlassHandle k,
duke@435 836 int which) {
coleenp@2497 837 // Names are interned, so we can compare Symbol*s directly
coleenp@2497 838 Symbol* cp_name = klass_name_at(which);
duke@435 839 return (cp_name == k->name());
duke@435 840 }
duke@435 841
duke@435 842
coleenp@2497 843 // Iterate over symbols and decrement ones which are Symbol*s.
coleenp@2497 844 // This is done during GC so do not need to lock constantPool unless we
coleenp@2497 845 // have per-thread safepoints.
coleenp@2497 846 // Only decrement the UTF8 symbols. Unresolved classes and strings point to
coleenp@2497 847 // these symbols but didn't increment the reference count.
coleenp@4037 848 void ConstantPool::unreference_symbols() {
coleenp@2497 849 for (int index = 1; index < length(); index++) { // Index 0 is unused
coleenp@2497 850 constantTag tag = tag_at(index);
coleenp@2497 851 if (tag.is_symbol()) {
coleenp@2497 852 symbol_at(index)->decrement_refcount();
coleenp@2497 853 }
coleenp@2497 854 }
coleenp@2497 855 }
duke@435 856
duke@435 857
duke@435 858 // Compare this constant pool's entry at index1 to the constant pool
duke@435 859 // cp2's entry at index2.
coleenp@4037 860 bool ConstantPool::compare_entry_to(int index1, constantPoolHandle cp2,
duke@435 861 int index2, TRAPS) {
duke@435 862
coleenp@5889 863 // The error tags are equivalent to non-error tags when comparing
coleenp@5889 864 jbyte t1 = tag_at(index1).non_error_value();
coleenp@5889 865 jbyte t2 = cp2->tag_at(index2).non_error_value();
duke@435 866
duke@435 867 if (t1 != t2) {
duke@435 868 // Not the same entry type so there is nothing else to check. Note
duke@435 869 // that this style of checking will consider resolved/unresolved
coleenp@4037 870 // class pairs as different.
coleenp@4037 871 // From the ConstantPool* API point of view, this is correct
coleenp@4037 872 // behavior. See VM_RedefineClasses::merge_constant_pools() to see how this
coleenp@4037 873 // plays out in the context of ConstantPool* merging.
duke@435 874 return false;
duke@435 875 }
duke@435 876
duke@435 877 switch (t1) {
duke@435 878 case JVM_CONSTANT_Class:
duke@435 879 {
coleenp@4037 880 Klass* k1 = klass_at(index1, CHECK_false);
coleenp@4037 881 Klass* k2 = cp2->klass_at(index2, CHECK_false);
duke@435 882 if (k1 == k2) {
duke@435 883 return true;
duke@435 884 }
duke@435 885 } break;
duke@435 886
duke@435 887 case JVM_CONSTANT_ClassIndex:
duke@435 888 {
duke@435 889 int recur1 = klass_index_at(index1);
duke@435 890 int recur2 = cp2->klass_index_at(index2);
duke@435 891 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@435 892 if (match) {
duke@435 893 return true;
duke@435 894 }
duke@435 895 } break;
duke@435 896
duke@435 897 case JVM_CONSTANT_Double:
duke@435 898 {
duke@435 899 jdouble d1 = double_at(index1);
duke@435 900 jdouble d2 = cp2->double_at(index2);
duke@435 901 if (d1 == d2) {
duke@435 902 return true;
duke@435 903 }
duke@435 904 } break;
duke@435 905
duke@435 906 case JVM_CONSTANT_Fieldref:
duke@435 907 case JVM_CONSTANT_InterfaceMethodref:
duke@435 908 case JVM_CONSTANT_Methodref:
duke@435 909 {
duke@435 910 int recur1 = uncached_klass_ref_index_at(index1);
duke@435 911 int recur2 = cp2->uncached_klass_ref_index_at(index2);
duke@435 912 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@435 913 if (match) {
duke@435 914 recur1 = uncached_name_and_type_ref_index_at(index1);
duke@435 915 recur2 = cp2->uncached_name_and_type_ref_index_at(index2);
duke@435 916 match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@435 917 if (match) {
duke@435 918 return true;
duke@435 919 }
duke@435 920 }
duke@435 921 } break;
duke@435 922
duke@435 923 case JVM_CONSTANT_Float:
duke@435 924 {
duke@435 925 jfloat f1 = float_at(index1);
duke@435 926 jfloat f2 = cp2->float_at(index2);
duke@435 927 if (f1 == f2) {
duke@435 928 return true;
duke@435 929 }
duke@435 930 } break;
duke@435 931
duke@435 932 case JVM_CONSTANT_Integer:
duke@435 933 {
duke@435 934 jint i1 = int_at(index1);
duke@435 935 jint i2 = cp2->int_at(index2);
duke@435 936 if (i1 == i2) {
duke@435 937 return true;
duke@435 938 }
duke@435 939 } break;
duke@435 940
duke@435 941 case JVM_CONSTANT_Long:
duke@435 942 {
duke@435 943 jlong l1 = long_at(index1);
duke@435 944 jlong l2 = cp2->long_at(index2);
duke@435 945 if (l1 == l2) {
duke@435 946 return true;
duke@435 947 }
duke@435 948 } break;
duke@435 949
duke@435 950 case JVM_CONSTANT_NameAndType:
duke@435 951 {
duke@435 952 int recur1 = name_ref_index_at(index1);
duke@435 953 int recur2 = cp2->name_ref_index_at(index2);
duke@435 954 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@435 955 if (match) {
duke@435 956 recur1 = signature_ref_index_at(index1);
duke@435 957 recur2 = cp2->signature_ref_index_at(index2);
duke@435 958 match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@435 959 if (match) {
duke@435 960 return true;
duke@435 961 }
duke@435 962 }
duke@435 963 } break;
duke@435 964
duke@435 965 case JVM_CONSTANT_StringIndex:
duke@435 966 {
duke@435 967 int recur1 = string_index_at(index1);
duke@435 968 int recur2 = cp2->string_index_at(index2);
duke@435 969 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@435 970 if (match) {
duke@435 971 return true;
duke@435 972 }
duke@435 973 } break;
duke@435 974
duke@435 975 case JVM_CONSTANT_UnresolvedClass:
duke@435 976 {
coleenp@2497 977 Symbol* k1 = unresolved_klass_at(index1);
coleenp@2497 978 Symbol* k2 = cp2->unresolved_klass_at(index2);
duke@435 979 if (k1 == k2) {
duke@435 980 return true;
duke@435 981 }
duke@435 982 } break;
duke@435 983
jrose@1957 984 case JVM_CONSTANT_MethodType:
jrose@1957 985 {
coleenp@5884 986 int k1 = method_type_index_at_error_ok(index1);
coleenp@5884 987 int k2 = cp2->method_type_index_at_error_ok(index2);
jrose@2353 988 bool match = compare_entry_to(k1, cp2, k2, CHECK_false);
jrose@2353 989 if (match) {
jrose@1957 990 return true;
jrose@1957 991 }
jrose@1957 992 } break;
jrose@1957 993
jrose@1957 994 case JVM_CONSTANT_MethodHandle:
jrose@1957 995 {
coleenp@5884 996 int k1 = method_handle_ref_kind_at_error_ok(index1);
coleenp@5884 997 int k2 = cp2->method_handle_ref_kind_at_error_ok(index2);
jrose@1957 998 if (k1 == k2) {
coleenp@5884 999 int i1 = method_handle_index_at_error_ok(index1);
coleenp@5884 1000 int i2 = cp2->method_handle_index_at_error_ok(index2);
jrose@2353 1001 bool match = compare_entry_to(i1, cp2, i2, CHECK_false);
jrose@2353 1002 if (match) {
jrose@1957 1003 return true;
jrose@1957 1004 }
jrose@1957 1005 }
jrose@1957 1006 } break;
jrose@1957 1007
jrose@2015 1008 case JVM_CONSTANT_InvokeDynamic:
jrose@2015 1009 {
sspitsyn@4983 1010 int k1 = invoke_dynamic_name_and_type_ref_index_at(index1);
sspitsyn@4983 1011 int k2 = cp2->invoke_dynamic_name_and_type_ref_index_at(index2);
sspitsyn@4983 1012 int i1 = invoke_dynamic_bootstrap_specifier_index(index1);
sspitsyn@4983 1013 int i2 = cp2->invoke_dynamic_bootstrap_specifier_index(index2);
ccheung@5183 1014 // separate statements and variables because CHECK_false is used
ccheung@5183 1015 bool match_entry = compare_entry_to(k1, cp2, k2, CHECK_false);
ccheung@5183 1016 bool match_operand = compare_operand_to(i1, cp2, i2, CHECK_false);
ccheung@5183 1017 return (match_entry && match_operand);
jrose@2015 1018 } break;
jrose@2015 1019
coleenp@4037 1020 case JVM_CONSTANT_String:
duke@435 1021 {
coleenp@2497 1022 Symbol* s1 = unresolved_string_at(index1);
coleenp@2497 1023 Symbol* s2 = cp2->unresolved_string_at(index2);
duke@435 1024 if (s1 == s2) {
duke@435 1025 return true;
duke@435 1026 }
duke@435 1027 } break;
duke@435 1028
duke@435 1029 case JVM_CONSTANT_Utf8:
duke@435 1030 {
coleenp@2497 1031 Symbol* s1 = symbol_at(index1);
coleenp@2497 1032 Symbol* s2 = cp2->symbol_at(index2);
duke@435 1033 if (s1 == s2) {
duke@435 1034 return true;
duke@435 1035 }
duke@435 1036 } break;
duke@435 1037
duke@435 1038 // Invalid is used as the tag for the second constant pool entry
duke@435 1039 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should
duke@435 1040 // not be seen by itself.
duke@435 1041 case JVM_CONSTANT_Invalid: // fall through
duke@435 1042
duke@435 1043 default:
duke@435 1044 ShouldNotReachHere();
duke@435 1045 break;
duke@435 1046 }
duke@435 1047
duke@435 1048 return false;
duke@435 1049 } // end compare_entry_to()
duke@435 1050
duke@435 1051
sspitsyn@4983 1052 // Resize the operands array with delta_len and delta_size.
sspitsyn@4983 1053 // Used in RedefineClasses for CP merge.
sspitsyn@4983 1054 void ConstantPool::resize_operands(int delta_len, int delta_size, TRAPS) {
sspitsyn@4983 1055 int old_len = operand_array_length(operands());
sspitsyn@4983 1056 int new_len = old_len + delta_len;
sspitsyn@4983 1057 int min_len = (delta_len > 0) ? old_len : new_len;
sspitsyn@4983 1058
sspitsyn@4983 1059 int old_size = operands()->length();
sspitsyn@4983 1060 int new_size = old_size + delta_size;
sspitsyn@4983 1061 int min_size = (delta_size > 0) ? old_size : new_size;
sspitsyn@4983 1062
sspitsyn@4983 1063 ClassLoaderData* loader_data = pool_holder()->class_loader_data();
sspitsyn@4983 1064 Array<u2>* new_ops = MetadataFactory::new_array<u2>(loader_data, new_size, CHECK);
sspitsyn@4983 1065
sspitsyn@4983 1066 // Set index in the resized array for existing elements only
sspitsyn@4983 1067 for (int idx = 0; idx < min_len; idx++) {
sspitsyn@4983 1068 int offset = operand_offset_at(idx); // offset in original array
sspitsyn@4983 1069 operand_offset_at_put(new_ops, idx, offset + 2*delta_len); // offset in resized array
sspitsyn@4983 1070 }
sspitsyn@4983 1071 // Copy the bootstrap specifiers only
sspitsyn@4983 1072 Copy::conjoint_memory_atomic(operands()->adr_at(2*old_len),
sspitsyn@4983 1073 new_ops->adr_at(2*new_len),
sspitsyn@4983 1074 (min_size - 2*min_len) * sizeof(u2));
sspitsyn@4983 1075 // Explicitly deallocate old operands array.
sspitsyn@4983 1076 // Note, it is not needed for 7u backport.
sspitsyn@4983 1077 if ( operands() != NULL) { // the safety check
sspitsyn@4983 1078 MetadataFactory::free_array<u2>(loader_data, operands());
sspitsyn@4983 1079 }
sspitsyn@4983 1080 set_operands(new_ops);
sspitsyn@4983 1081 } // end resize_operands()
sspitsyn@4983 1082
sspitsyn@4983 1083
sspitsyn@4983 1084 // Extend the operands array with the length and size of the ext_cp operands.
sspitsyn@4983 1085 // Used in RedefineClasses for CP merge.
sspitsyn@4983 1086 void ConstantPool::extend_operands(constantPoolHandle ext_cp, TRAPS) {
sspitsyn@4983 1087 int delta_len = operand_array_length(ext_cp->operands());
sspitsyn@4983 1088 if (delta_len == 0) {
sspitsyn@4983 1089 return; // nothing to do
sspitsyn@4983 1090 }
sspitsyn@4983 1091 int delta_size = ext_cp->operands()->length();
sspitsyn@4983 1092
sspitsyn@4983 1093 assert(delta_len > 0 && delta_size > 0, "extended operands array must be bigger");
sspitsyn@4983 1094
sspitsyn@4983 1095 if (operand_array_length(operands()) == 0) {
sspitsyn@4983 1096 ClassLoaderData* loader_data = pool_holder()->class_loader_data();
sspitsyn@4983 1097 Array<u2>* new_ops = MetadataFactory::new_array<u2>(loader_data, delta_size, CHECK);
sspitsyn@4983 1098 // The first element index defines the offset of second part
sspitsyn@4983 1099 operand_offset_at_put(new_ops, 0, 2*delta_len); // offset in new array
sspitsyn@4983 1100 set_operands(new_ops);
sspitsyn@4983 1101 } else {
sspitsyn@4983 1102 resize_operands(delta_len, delta_size, CHECK);
sspitsyn@4983 1103 }
sspitsyn@4983 1104
sspitsyn@4983 1105 } // end extend_operands()
sspitsyn@4983 1106
sspitsyn@4983 1107
sspitsyn@4983 1108 // Shrink the operands array to a smaller array with new_len length.
sspitsyn@4983 1109 // Used in RedefineClasses for CP merge.
sspitsyn@4983 1110 void ConstantPool::shrink_operands(int new_len, TRAPS) {
sspitsyn@4983 1111 int old_len = operand_array_length(operands());
sspitsyn@4983 1112 if (new_len == old_len) {
sspitsyn@4983 1113 return; // nothing to do
sspitsyn@4983 1114 }
sspitsyn@4983 1115 assert(new_len < old_len, "shrunken operands array must be smaller");
sspitsyn@4983 1116
sspitsyn@4983 1117 int free_base = operand_next_offset_at(new_len - 1);
sspitsyn@4983 1118 int delta_len = new_len - old_len;
sspitsyn@4983 1119 int delta_size = 2*delta_len + free_base - operands()->length();
sspitsyn@4983 1120
sspitsyn@4983 1121 resize_operands(delta_len, delta_size, CHECK);
sspitsyn@4983 1122
sspitsyn@4983 1123 } // end shrink_operands()
sspitsyn@4983 1124
sspitsyn@4983 1125
sspitsyn@4493 1126 void ConstantPool::copy_operands(constantPoolHandle from_cp,
sspitsyn@4493 1127 constantPoolHandle to_cp,
sspitsyn@4493 1128 TRAPS) {
jrose@2353 1129
jrose@2353 1130 int from_oplen = operand_array_length(from_cp->operands());
jrose@2353 1131 int old_oplen = operand_array_length(to_cp->operands());
jrose@2353 1132 if (from_oplen != 0) {
kamg@4245 1133 ClassLoaderData* loader_data = to_cp->pool_holder()->class_loader_data();
jrose@2353 1134 // append my operands to the target's operands array
jrose@2353 1135 if (old_oplen == 0) {
kamg@4245 1136 // Can't just reuse from_cp's operand list because of deallocation issues
kamg@4245 1137 int len = from_cp->operands()->length();
kamg@4245 1138 Array<u2>* new_ops = MetadataFactory::new_array<u2>(loader_data, len, CHECK);
kamg@4245 1139 Copy::conjoint_memory_atomic(
kamg@4245 1140 from_cp->operands()->adr_at(0), new_ops->adr_at(0), len * sizeof(u2));
kamg@4245 1141 to_cp->set_operands(new_ops);
jrose@2353 1142 } else {
jrose@2353 1143 int old_len = to_cp->operands()->length();
jrose@2353 1144 int from_len = from_cp->operands()->length();
jrose@2353 1145 int old_off = old_oplen * sizeof(u2);
jrose@2353 1146 int from_off = from_oplen * sizeof(u2);
coleenp@4037 1147 // Use the metaspace for the destination constant pool
coleenp@4037 1148 Array<u2>* new_operands = MetadataFactory::new_array<u2>(loader_data, old_len + from_len, CHECK);
jrose@2353 1149 int fillp = 0, len = 0;
jrose@2353 1150 // first part of dest
coleenp@4037 1151 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(0),
coleenp@4037 1152 new_operands->adr_at(fillp),
jrose@2353 1153 (len = old_off) * sizeof(u2));
jrose@2353 1154 fillp += len;
jrose@2353 1155 // first part of src
sspitsyn@4505 1156 Copy::conjoint_memory_atomic(from_cp->operands()->adr_at(0),
coleenp@4037 1157 new_operands->adr_at(fillp),
jrose@2353 1158 (len = from_off) * sizeof(u2));
jrose@2353 1159 fillp += len;
jrose@2353 1160 // second part of dest
coleenp@4037 1161 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(old_off),
coleenp@4037 1162 new_operands->adr_at(fillp),
jrose@2353 1163 (len = old_len - old_off) * sizeof(u2));
jrose@2353 1164 fillp += len;
jrose@2353 1165 // second part of src
sspitsyn@4505 1166 Copy::conjoint_memory_atomic(from_cp->operands()->adr_at(from_off),
coleenp@4037 1167 new_operands->adr_at(fillp),
jrose@2353 1168 (len = from_len - from_off) * sizeof(u2));
jrose@2353 1169 fillp += len;
jrose@2353 1170 assert(fillp == new_operands->length(), "");
jrose@2353 1171
jrose@2353 1172 // Adjust indexes in the first part of the copied operands array.
jrose@2353 1173 for (int j = 0; j < from_oplen; j++) {
coleenp@4037 1174 int offset = operand_offset_at(new_operands, old_oplen + j);
jrose@2353 1175 assert(offset == operand_offset_at(from_cp->operands(), j), "correct copy");
jrose@2353 1176 offset += old_len; // every new tuple is preceded by old_len extra u2's
coleenp@4037 1177 operand_offset_at_put(new_operands, old_oplen + j, offset);
jrose@2353 1178 }
jrose@2353 1179
jrose@2353 1180 // replace target operands array with combined array
coleenp@4037 1181 to_cp->set_operands(new_operands);
jrose@2353 1182 }
jrose@2353 1183 }
sspitsyn@4493 1184 } // end copy_operands()
jrose@2353 1185
sspitsyn@4493 1186
sspitsyn@4493 1187 // Copy this constant pool's entries at start_i to end_i (inclusive)
sspitsyn@4493 1188 // to the constant pool to_cp's entries starting at to_i. A total of
sspitsyn@4493 1189 // (end_i - start_i) + 1 entries are copied.
sspitsyn@4493 1190 void ConstantPool::copy_cp_to_impl(constantPoolHandle from_cp, int start_i, int end_i,
sspitsyn@4493 1191 constantPoolHandle to_cp, int to_i, TRAPS) {
sspitsyn@4493 1192
sspitsyn@4493 1193
sspitsyn@4493 1194 int dest_i = to_i; // leave original alone for debug purposes
sspitsyn@4493 1195
sspitsyn@4493 1196 for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) {
sspitsyn@4493 1197 copy_entry_to(from_cp, src_i, to_cp, dest_i, CHECK);
sspitsyn@4493 1198
sspitsyn@4493 1199 switch (from_cp->tag_at(src_i).value()) {
sspitsyn@4493 1200 case JVM_CONSTANT_Double:
sspitsyn@4493 1201 case JVM_CONSTANT_Long:
sspitsyn@4493 1202 // double and long take two constant pool entries
sspitsyn@4493 1203 src_i += 2;
sspitsyn@4493 1204 dest_i += 2;
sspitsyn@4493 1205 break;
sspitsyn@4493 1206
sspitsyn@4493 1207 default:
sspitsyn@4493 1208 // all others take one constant pool entry
sspitsyn@4493 1209 src_i++;
sspitsyn@4493 1210 dest_i++;
sspitsyn@4493 1211 break;
sspitsyn@4493 1212 }
sspitsyn@4493 1213 }
sspitsyn@4493 1214 copy_operands(from_cp, to_cp, CHECK);
sspitsyn@4493 1215
sspitsyn@4493 1216 } // end copy_cp_to_impl()
duke@435 1217
duke@435 1218
duke@435 1219 // Copy this constant pool's entry at from_i to the constant pool
duke@435 1220 // to_cp's entry at to_i.
coleenp@4037 1221 void ConstantPool::copy_entry_to(constantPoolHandle from_cp, int from_i,
jrose@2353 1222 constantPoolHandle to_cp, int to_i,
jrose@2353 1223 TRAPS) {
duke@435 1224
jrose@2353 1225 int tag = from_cp->tag_at(from_i).value();
jrose@2353 1226 switch (tag) {
duke@435 1227 case JVM_CONSTANT_Class:
duke@435 1228 {
coleenp@4037 1229 Klass* k = from_cp->klass_at(from_i, CHECK);
duke@435 1230 to_cp->klass_at_put(to_i, k);
duke@435 1231 } break;
duke@435 1232
duke@435 1233 case JVM_CONSTANT_ClassIndex:
duke@435 1234 {
jrose@2353 1235 jint ki = from_cp->klass_index_at(from_i);
duke@435 1236 to_cp->klass_index_at_put(to_i, ki);
duke@435 1237 } break;
duke@435 1238
duke@435 1239 case JVM_CONSTANT_Double:
duke@435 1240 {
jrose@2353 1241 jdouble d = from_cp->double_at(from_i);
duke@435 1242 to_cp->double_at_put(to_i, d);
duke@435 1243 // double takes two constant pool entries so init second entry's tag
duke@435 1244 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid);
duke@435 1245 } break;
duke@435 1246
duke@435 1247 case JVM_CONSTANT_Fieldref:
duke@435 1248 {
jrose@2353 1249 int class_index = from_cp->uncached_klass_ref_index_at(from_i);
jrose@2353 1250 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i);
duke@435 1251 to_cp->field_at_put(to_i, class_index, name_and_type_index);
duke@435 1252 } break;
duke@435 1253
duke@435 1254 case JVM_CONSTANT_Float:
duke@435 1255 {
jrose@2353 1256 jfloat f = from_cp->float_at(from_i);
duke@435 1257 to_cp->float_at_put(to_i, f);
duke@435 1258 } break;
duke@435 1259
duke@435 1260 case JVM_CONSTANT_Integer:
duke@435 1261 {
jrose@2353 1262 jint i = from_cp->int_at(from_i);
duke@435 1263 to_cp->int_at_put(to_i, i);
duke@435 1264 } break;
duke@435 1265
duke@435 1266 case JVM_CONSTANT_InterfaceMethodref:
duke@435 1267 {
jrose@2353 1268 int class_index = from_cp->uncached_klass_ref_index_at(from_i);
jrose@2353 1269 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i);
duke@435 1270 to_cp->interface_method_at_put(to_i, class_index, name_and_type_index);
duke@435 1271 } break;
duke@435 1272
duke@435 1273 case JVM_CONSTANT_Long:
duke@435 1274 {
jrose@2353 1275 jlong l = from_cp->long_at(from_i);
duke@435 1276 to_cp->long_at_put(to_i, l);
duke@435 1277 // long takes two constant pool entries so init second entry's tag
duke@435 1278 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid);
duke@435 1279 } break;
duke@435 1280
duke@435 1281 case JVM_CONSTANT_Methodref:
duke@435 1282 {
jrose@2353 1283 int class_index = from_cp->uncached_klass_ref_index_at(from_i);
jrose@2353 1284 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i);
duke@435 1285 to_cp->method_at_put(to_i, class_index, name_and_type_index);
duke@435 1286 } break;
duke@435 1287
duke@435 1288 case JVM_CONSTANT_NameAndType:
duke@435 1289 {
jrose@2353 1290 int name_ref_index = from_cp->name_ref_index_at(from_i);
jrose@2353 1291 int signature_ref_index = from_cp->signature_ref_index_at(from_i);
duke@435 1292 to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index);
duke@435 1293 } break;
duke@435 1294
duke@435 1295 case JVM_CONSTANT_StringIndex:
duke@435 1296 {
jrose@2353 1297 jint si = from_cp->string_index_at(from_i);
duke@435 1298 to_cp->string_index_at_put(to_i, si);
duke@435 1299 } break;
duke@435 1300
duke@435 1301 case JVM_CONSTANT_UnresolvedClass:
sla@6338 1302 case JVM_CONSTANT_UnresolvedClassInError:
duke@435 1303 {
coleenp@2614 1304 // Can be resolved after checking tag, so check the slot first.
coleenp@2614 1305 CPSlot entry = from_cp->slot_at(from_i);
coleenp@4037 1306 if (entry.is_resolved()) {
coleenp@4037 1307 assert(entry.get_klass()->is_klass(), "must be");
coleenp@2614 1308 // Already resolved
coleenp@4037 1309 to_cp->klass_at_put(to_i, entry.get_klass());
coleenp@2614 1310 } else {
coleenp@2614 1311 to_cp->unresolved_klass_at_put(to_i, entry.get_symbol());
coleenp@2614 1312 }
duke@435 1313 } break;
duke@435 1314
coleenp@4037 1315 case JVM_CONSTANT_String:
duke@435 1316 {
coleenp@4037 1317 Symbol* s = from_cp->unresolved_string_at(from_i);
coleenp@4037 1318 to_cp->unresolved_string_at_put(to_i, s);
duke@435 1319 } break;
duke@435 1320
duke@435 1321 case JVM_CONSTANT_Utf8:
duke@435 1322 {
coleenp@2497 1323 Symbol* s = from_cp->symbol_at(from_i);
coleenp@4037 1324 // Need to increase refcount, the old one will be thrown away and deferenced
coleenp@4037 1325 s->increment_refcount();
duke@435 1326 to_cp->symbol_at_put(to_i, s);
duke@435 1327 } break;
duke@435 1328
jrose@1957 1329 case JVM_CONSTANT_MethodType:
coleenp@5884 1330 case JVM_CONSTANT_MethodTypeInError:
jrose@1957 1331 {
coleenp@5884 1332 jint k = from_cp->method_type_index_at_error_ok(from_i);
jrose@1957 1333 to_cp->method_type_index_at_put(to_i, k);
jrose@1957 1334 } break;
jrose@1957 1335
jrose@1957 1336 case JVM_CONSTANT_MethodHandle:
coleenp@5884 1337 case JVM_CONSTANT_MethodHandleInError:
jrose@1957 1338 {
coleenp@5884 1339 int k1 = from_cp->method_handle_ref_kind_at_error_ok(from_i);
coleenp@5884 1340 int k2 = from_cp->method_handle_index_at_error_ok(from_i);
jrose@1957 1341 to_cp->method_handle_index_at_put(to_i, k1, k2);
jrose@1957 1342 } break;
jrose@1957 1343
jrose@2015 1344 case JVM_CONSTANT_InvokeDynamic:
jrose@2015 1345 {
jrose@2353 1346 int k1 = from_cp->invoke_dynamic_bootstrap_specifier_index(from_i);
jrose@2353 1347 int k2 = from_cp->invoke_dynamic_name_and_type_ref_index_at(from_i);
jrose@2353 1348 k1 += operand_array_length(to_cp->operands()); // to_cp might already have operands
jrose@2353 1349 to_cp->invoke_dynamic_at_put(to_i, k1, k2);
jrose@2015 1350 } break;
jrose@2015 1351
duke@435 1352 // Invalid is used as the tag for the second constant pool entry
duke@435 1353 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should
duke@435 1354 // not be seen by itself.
duke@435 1355 case JVM_CONSTANT_Invalid: // fall through
duke@435 1356
duke@435 1357 default:
duke@435 1358 {
duke@435 1359 ShouldNotReachHere();
duke@435 1360 } break;
duke@435 1361 }
duke@435 1362 } // end copy_entry_to()
duke@435 1363
duke@435 1364
duke@435 1365 // Search constant pool search_cp for an entry that matches this
duke@435 1366 // constant pool's entry at pattern_i. Returns the index of a
duke@435 1367 // matching entry or zero (0) if there is no matching entry.
coleenp@4037 1368 int ConstantPool::find_matching_entry(int pattern_i,
duke@435 1369 constantPoolHandle search_cp, TRAPS) {
duke@435 1370
duke@435 1371 // index zero (0) is not used
duke@435 1372 for (int i = 1; i < search_cp->length(); i++) {
duke@435 1373 bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0);
duke@435 1374 if (found) {
duke@435 1375 return i;
duke@435 1376 }
duke@435 1377 }
duke@435 1378
duke@435 1379 return 0; // entry not found; return unused index zero (0)
duke@435 1380 } // end find_matching_entry()
duke@435 1381
duke@435 1382
sspitsyn@4983 1383 // Compare this constant pool's bootstrap specifier at idx1 to the constant pool
sspitsyn@4983 1384 // cp2's bootstrap specifier at idx2.
sspitsyn@4983 1385 bool ConstantPool::compare_operand_to(int idx1, constantPoolHandle cp2, int idx2, TRAPS) {
sspitsyn@4983 1386 int k1 = operand_bootstrap_method_ref_index_at(idx1);
sspitsyn@4983 1387 int k2 = cp2->operand_bootstrap_method_ref_index_at(idx2);
sspitsyn@4983 1388 bool match = compare_entry_to(k1, cp2, k2, CHECK_false);
sspitsyn@4983 1389
sspitsyn@4983 1390 if (!match) {
sspitsyn@4983 1391 return false;
sspitsyn@4983 1392 }
sspitsyn@4983 1393 int argc = operand_argument_count_at(idx1);
sspitsyn@4983 1394 if (argc == cp2->operand_argument_count_at(idx2)) {
sspitsyn@4983 1395 for (int j = 0; j < argc; j++) {
sspitsyn@4983 1396 k1 = operand_argument_index_at(idx1, j);
sspitsyn@4983 1397 k2 = cp2->operand_argument_index_at(idx2, j);
sspitsyn@4983 1398 match = compare_entry_to(k1, cp2, k2, CHECK_false);
sspitsyn@4983 1399 if (!match) {
sspitsyn@4983 1400 return false;
sspitsyn@4983 1401 }
sspitsyn@4983 1402 }
sspitsyn@4983 1403 return true; // got through loop; all elements equal
sspitsyn@4983 1404 }
sspitsyn@4983 1405 return false;
sspitsyn@4983 1406 } // end compare_operand_to()
sspitsyn@4983 1407
sspitsyn@4983 1408 // Search constant pool search_cp for a bootstrap specifier that matches
sspitsyn@4983 1409 // this constant pool's bootstrap specifier at pattern_i index.
sspitsyn@4983 1410 // Return the index of a matching bootstrap specifier or (-1) if there is no match.
sspitsyn@4983 1411 int ConstantPool::find_matching_operand(int pattern_i,
sspitsyn@4983 1412 constantPoolHandle search_cp, int search_len, TRAPS) {
sspitsyn@4983 1413 for (int i = 0; i < search_len; i++) {
sspitsyn@4983 1414 bool found = compare_operand_to(pattern_i, search_cp, i, CHECK_(-1));
sspitsyn@4983 1415 if (found) {
sspitsyn@4983 1416 return i;
sspitsyn@4983 1417 }
sspitsyn@4983 1418 }
sspitsyn@4983 1419 return -1; // bootstrap specifier not found; return unused index (-1)
sspitsyn@4983 1420 } // end find_matching_operand()
sspitsyn@4983 1421
sspitsyn@4983 1422
duke@435 1423 #ifndef PRODUCT
duke@435 1424
coleenp@4037 1425 const char* ConstantPool::printable_name_at(int which) {
duke@435 1426
duke@435 1427 constantTag tag = tag_at(which);
duke@435 1428
coleenp@4037 1429 if (tag.is_string()) {
duke@435 1430 return string_at_noresolve(which);
duke@435 1431 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
duke@435 1432 return klass_name_at(which)->as_C_string();
duke@435 1433 } else if (tag.is_symbol()) {
duke@435 1434 return symbol_at(which)->as_C_string();
duke@435 1435 }
duke@435 1436 return "";
duke@435 1437 }
duke@435 1438
duke@435 1439 #endif // PRODUCT
duke@435 1440
duke@435 1441
duke@435 1442 // JVMTI GetConstantPool support
duke@435 1443
mikael@4889 1444 // For debugging of constant pool
mikael@4889 1445 const bool debug_cpool = false;
duke@435 1446
mikael@4889 1447 #define DBG(code) do { if (debug_cpool) { (code); } } while(0)
duke@435 1448
duke@435 1449 static void print_cpool_bytes(jint cnt, u1 *bytes) {
mikael@4889 1450 const char* WARN_MSG = "Must not be such entry!";
duke@435 1451 jint size = 0;
duke@435 1452 u2 idx1, idx2;
duke@435 1453
duke@435 1454 for (jint idx = 1; idx < cnt; idx++) {
duke@435 1455 jint ent_size = 0;
duke@435 1456 u1 tag = *bytes++;
duke@435 1457 size++; // count tag
duke@435 1458
duke@435 1459 printf("const #%03d, tag: %02d ", idx, tag);
duke@435 1460 switch(tag) {
duke@435 1461 case JVM_CONSTANT_Invalid: {
duke@435 1462 printf("Invalid");
duke@435 1463 break;
duke@435 1464 }
duke@435 1465 case JVM_CONSTANT_Unicode: {
duke@435 1466 printf("Unicode %s", WARN_MSG);
duke@435 1467 break;
duke@435 1468 }
duke@435 1469 case JVM_CONSTANT_Utf8: {
duke@435 1470 u2 len = Bytes::get_Java_u2(bytes);
duke@435 1471 char str[128];
duke@435 1472 if (len > 127) {
duke@435 1473 len = 127;
duke@435 1474 }
duke@435 1475 strncpy(str, (char *) (bytes+2), len);
duke@435 1476 str[len] = '\0';
duke@435 1477 printf("Utf8 \"%s\"", str);
duke@435 1478 ent_size = 2 + len;
duke@435 1479 break;
duke@435 1480 }
duke@435 1481 case JVM_CONSTANT_Integer: {
duke@435 1482 u4 val = Bytes::get_Java_u4(bytes);
duke@435 1483 printf("int %d", *(int *) &val);
duke@435 1484 ent_size = 4;
duke@435 1485 break;
duke@435 1486 }
duke@435 1487 case JVM_CONSTANT_Float: {
duke@435 1488 u4 val = Bytes::get_Java_u4(bytes);
duke@435 1489 printf("float %5.3ff", *(float *) &val);
duke@435 1490 ent_size = 4;
duke@435 1491 break;
duke@435 1492 }
duke@435 1493 case JVM_CONSTANT_Long: {
duke@435 1494 u8 val = Bytes::get_Java_u8(bytes);
never@3156 1495 printf("long "INT64_FORMAT, (int64_t) *(jlong *) &val);
duke@435 1496 ent_size = 8;
duke@435 1497 idx++; // Long takes two cpool slots
duke@435 1498 break;
duke@435 1499 }
duke@435 1500 case JVM_CONSTANT_Double: {
duke@435 1501 u8 val = Bytes::get_Java_u8(bytes);
duke@435 1502 printf("double %5.3fd", *(jdouble *)&val);
duke@435 1503 ent_size = 8;
duke@435 1504 idx++; // Double takes two cpool slots
duke@435 1505 break;
duke@435 1506 }
duke@435 1507 case JVM_CONSTANT_Class: {
duke@435 1508 idx1 = Bytes::get_Java_u2(bytes);
duke@435 1509 printf("class #%03d", idx1);
duke@435 1510 ent_size = 2;
duke@435 1511 break;
duke@435 1512 }
duke@435 1513 case JVM_CONSTANT_String: {
duke@435 1514 idx1 = Bytes::get_Java_u2(bytes);
duke@435 1515 printf("String #%03d", idx1);
duke@435 1516 ent_size = 2;
duke@435 1517 break;
duke@435 1518 }
duke@435 1519 case JVM_CONSTANT_Fieldref: {
duke@435 1520 idx1 = Bytes::get_Java_u2(bytes);
duke@435 1521 idx2 = Bytes::get_Java_u2(bytes+2);
duke@435 1522 printf("Field #%03d, #%03d", (int) idx1, (int) idx2);
duke@435 1523 ent_size = 4;
duke@435 1524 break;
duke@435 1525 }
duke@435 1526 case JVM_CONSTANT_Methodref: {
duke@435 1527 idx1 = Bytes::get_Java_u2(bytes);
duke@435 1528 idx2 = Bytes::get_Java_u2(bytes+2);
duke@435 1529 printf("Method #%03d, #%03d", idx1, idx2);
duke@435 1530 ent_size = 4;
duke@435 1531 break;
duke@435 1532 }
duke@435 1533 case JVM_CONSTANT_InterfaceMethodref: {
duke@435 1534 idx1 = Bytes::get_Java_u2(bytes);
duke@435 1535 idx2 = Bytes::get_Java_u2(bytes+2);
duke@435 1536 printf("InterfMethod #%03d, #%03d", idx1, idx2);
duke@435 1537 ent_size = 4;
duke@435 1538 break;
duke@435 1539 }
duke@435 1540 case JVM_CONSTANT_NameAndType: {
duke@435 1541 idx1 = Bytes::get_Java_u2(bytes);
duke@435 1542 idx2 = Bytes::get_Java_u2(bytes+2);
duke@435 1543 printf("NameAndType #%03d, #%03d", idx1, idx2);
duke@435 1544 ent_size = 4;
duke@435 1545 break;
duke@435 1546 }
duke@435 1547 case JVM_CONSTANT_ClassIndex: {
duke@435 1548 printf("ClassIndex %s", WARN_MSG);
duke@435 1549 break;
duke@435 1550 }
duke@435 1551 case JVM_CONSTANT_UnresolvedClass: {
duke@435 1552 printf("UnresolvedClass: %s", WARN_MSG);
duke@435 1553 break;
duke@435 1554 }
duke@435 1555 case JVM_CONSTANT_UnresolvedClassInError: {
duke@435 1556 printf("UnresolvedClassInErr: %s", WARN_MSG);
duke@435 1557 break;
duke@435 1558 }
duke@435 1559 case JVM_CONSTANT_StringIndex: {
duke@435 1560 printf("StringIndex: %s", WARN_MSG);
duke@435 1561 break;
duke@435 1562 }
duke@435 1563 }
duke@435 1564 printf(";\n");
duke@435 1565 bytes += ent_size;
duke@435 1566 size += ent_size;
duke@435 1567 }
duke@435 1568 printf("Cpool size: %d\n", size);
duke@435 1569 fflush(0);
duke@435 1570 return;
duke@435 1571 } /* end print_cpool_bytes */
duke@435 1572
duke@435 1573
duke@435 1574 // Returns size of constant pool entry.
coleenp@4037 1575 jint ConstantPool::cpool_entry_size(jint idx) {
duke@435 1576 switch(tag_at(idx).value()) {
duke@435 1577 case JVM_CONSTANT_Invalid:
duke@435 1578 case JVM_CONSTANT_Unicode:
duke@435 1579 return 1;
duke@435 1580
duke@435 1581 case JVM_CONSTANT_Utf8:
duke@435 1582 return 3 + symbol_at(idx)->utf8_length();
duke@435 1583
duke@435 1584 case JVM_CONSTANT_Class:
duke@435 1585 case JVM_CONSTANT_String:
duke@435 1586 case JVM_CONSTANT_ClassIndex:
duke@435 1587 case JVM_CONSTANT_UnresolvedClass:
duke@435 1588 case JVM_CONSTANT_UnresolvedClassInError:
duke@435 1589 case JVM_CONSTANT_StringIndex:
jrose@1957 1590 case JVM_CONSTANT_MethodType:
iklam@5760 1591 case JVM_CONSTANT_MethodTypeInError:
duke@435 1592 return 3;
duke@435 1593
jrose@1957 1594 case JVM_CONSTANT_MethodHandle:
iklam@5760 1595 case JVM_CONSTANT_MethodHandleInError:
jrose@1957 1596 return 4; //tag, ref_kind, ref_index
jrose@1957 1597
duke@435 1598 case JVM_CONSTANT_Integer:
duke@435 1599 case JVM_CONSTANT_Float:
duke@435 1600 case JVM_CONSTANT_Fieldref:
duke@435 1601 case JVM_CONSTANT_Methodref:
duke@435 1602 case JVM_CONSTANT_InterfaceMethodref:
duke@435 1603 case JVM_CONSTANT_NameAndType:
jrose@2268 1604 return 5;
jrose@2268 1605
jrose@2015 1606 case JVM_CONSTANT_InvokeDynamic:
jrose@2353 1607 // u1 tag, u2 bsm, u2 nt
jrose@2353 1608 return 5;
duke@435 1609
duke@435 1610 case JVM_CONSTANT_Long:
duke@435 1611 case JVM_CONSTANT_Double:
duke@435 1612 return 9;
duke@435 1613 }
duke@435 1614 assert(false, "cpool_entry_size: Invalid constant pool entry tag");
duke@435 1615 return 1;
duke@435 1616 } /* end cpool_entry_size */
duke@435 1617
duke@435 1618
duke@435 1619 // SymbolHashMap is used to find a constant pool index from a string.
duke@435 1620 // This function fills in SymbolHashMaps, one for utf8s and one for
duke@435 1621 // class names, returns size of the cpool raw bytes.
coleenp@4037 1622 jint ConstantPool::hash_entries_to(SymbolHashMap *symmap,
duke@435 1623 SymbolHashMap *classmap) {
duke@435 1624 jint size = 0;
duke@435 1625
duke@435 1626 for (u2 idx = 1; idx < length(); idx++) {
duke@435 1627 u2 tag = tag_at(idx).value();
duke@435 1628 size += cpool_entry_size(idx);
duke@435 1629
duke@435 1630 switch(tag) {
duke@435 1631 case JVM_CONSTANT_Utf8: {
coleenp@2497 1632 Symbol* sym = symbol_at(idx);
duke@435 1633 symmap->add_entry(sym, idx);
duke@435 1634 DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx));
duke@435 1635 break;
duke@435 1636 }
duke@435 1637 case JVM_CONSTANT_Class:
duke@435 1638 case JVM_CONSTANT_UnresolvedClass:
duke@435 1639 case JVM_CONSTANT_UnresolvedClassInError: {
coleenp@2497 1640 Symbol* sym = klass_name_at(idx);
duke@435 1641 classmap->add_entry(sym, idx);
duke@435 1642 DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx));
duke@435 1643 break;
duke@435 1644 }
duke@435 1645 case JVM_CONSTANT_Long:
duke@435 1646 case JVM_CONSTANT_Double: {
duke@435 1647 idx++; // Both Long and Double take two cpool slots
duke@435 1648 break;
duke@435 1649 }
duke@435 1650 }
duke@435 1651 }
duke@435 1652 return size;
duke@435 1653 } /* end hash_utf8_entries_to */
duke@435 1654
duke@435 1655
duke@435 1656 // Copy cpool bytes.
duke@435 1657 // Returns:
duke@435 1658 // 0, in case of OutOfMemoryError
duke@435 1659 // -1, in case of internal error
duke@435 1660 // > 0, count of the raw cpool bytes that have been copied
coleenp@4037 1661 int ConstantPool::copy_cpool_bytes(int cpool_size,
duke@435 1662 SymbolHashMap* tbl,
duke@435 1663 unsigned char *bytes) {
duke@435 1664 u2 idx1, idx2;
duke@435 1665 jint size = 0;
duke@435 1666 jint cnt = length();
duke@435 1667 unsigned char *start_bytes = bytes;
duke@435 1668
duke@435 1669 for (jint idx = 1; idx < cnt; idx++) {
duke@435 1670 u1 tag = tag_at(idx).value();
duke@435 1671 jint ent_size = cpool_entry_size(idx);
duke@435 1672
duke@435 1673 assert(size + ent_size <= cpool_size, "Size mismatch");
duke@435 1674
duke@435 1675 *bytes = tag;
duke@435 1676 DBG(printf("#%03hd tag=%03hd, ", idx, tag));
duke@435 1677 switch(tag) {
duke@435 1678 case JVM_CONSTANT_Invalid: {
duke@435 1679 DBG(printf("JVM_CONSTANT_Invalid"));
duke@435 1680 break;
duke@435 1681 }
duke@435 1682 case JVM_CONSTANT_Unicode: {
duke@435 1683 assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode");
duke@435 1684 DBG(printf("JVM_CONSTANT_Unicode"));
duke@435 1685 break;
duke@435 1686 }
duke@435 1687 case JVM_CONSTANT_Utf8: {
coleenp@2497 1688 Symbol* sym = symbol_at(idx);
duke@435 1689 char* str = sym->as_utf8();
duke@435 1690 // Warning! It's crashing on x86 with len = sym->utf8_length()
duke@435 1691 int len = (int) strlen(str);
duke@435 1692 Bytes::put_Java_u2((address) (bytes+1), (u2) len);
duke@435 1693 for (int i = 0; i < len; i++) {
duke@435 1694 bytes[3+i] = (u1) str[i];
duke@435 1695 }
duke@435 1696 DBG(printf("JVM_CONSTANT_Utf8: %s ", str));
duke@435 1697 break;
duke@435 1698 }
duke@435 1699 case JVM_CONSTANT_Integer: {
duke@435 1700 jint val = int_at(idx);
duke@435 1701 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val);
duke@435 1702 break;
duke@435 1703 }
duke@435 1704 case JVM_CONSTANT_Float: {
duke@435 1705 jfloat val = float_at(idx);
duke@435 1706 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val);
duke@435 1707 break;
duke@435 1708 }
duke@435 1709 case JVM_CONSTANT_Long: {
duke@435 1710 jlong val = long_at(idx);
duke@435 1711 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val);
duke@435 1712 idx++; // Long takes two cpool slots
duke@435 1713 break;
duke@435 1714 }
duke@435 1715 case JVM_CONSTANT_Double: {
duke@435 1716 jdouble val = double_at(idx);
duke@435 1717 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val);
duke@435 1718 idx++; // Double takes two cpool slots
duke@435 1719 break;
duke@435 1720 }
duke@435 1721 case JVM_CONSTANT_Class:
duke@435 1722 case JVM_CONSTANT_UnresolvedClass:
duke@435 1723 case JVM_CONSTANT_UnresolvedClassInError: {
duke@435 1724 *bytes = JVM_CONSTANT_Class;
coleenp@2497 1725 Symbol* sym = klass_name_at(idx);
duke@435 1726 idx1 = tbl->symbol_to_value(sym);
duke@435 1727 assert(idx1 != 0, "Have not found a hashtable entry");
duke@435 1728 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@435 1729 DBG(printf("JVM_CONSTANT_Class: idx=#%03hd, %s", idx1, sym->as_utf8()));
duke@435 1730 break;
duke@435 1731 }
duke@435 1732 case JVM_CONSTANT_String: {
duke@435 1733 *bytes = JVM_CONSTANT_String;
coleenp@2497 1734 Symbol* sym = unresolved_string_at(idx);
duke@435 1735 idx1 = tbl->symbol_to_value(sym);
duke@435 1736 assert(idx1 != 0, "Have not found a hashtable entry");
duke@435 1737 Bytes::put_Java_u2((address) (bytes+1), idx1);
mikael@4889 1738 DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, sym->as_utf8()));
duke@435 1739 break;
duke@435 1740 }
duke@435 1741 case JVM_CONSTANT_Fieldref:
duke@435 1742 case JVM_CONSTANT_Methodref:
duke@435 1743 case JVM_CONSTANT_InterfaceMethodref: {
duke@435 1744 idx1 = uncached_klass_ref_index_at(idx);
duke@435 1745 idx2 = uncached_name_and_type_ref_index_at(idx);
duke@435 1746 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@435 1747 Bytes::put_Java_u2((address) (bytes+3), idx2);
duke@435 1748 DBG(printf("JVM_CONSTANT_Methodref: %hd %hd", idx1, idx2));
duke@435 1749 break;
duke@435 1750 }
duke@435 1751 case JVM_CONSTANT_NameAndType: {
duke@435 1752 idx1 = name_ref_index_at(idx);
duke@435 1753 idx2 = signature_ref_index_at(idx);
duke@435 1754 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@435 1755 Bytes::put_Java_u2((address) (bytes+3), idx2);
duke@435 1756 DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2));
duke@435 1757 break;
duke@435 1758 }
duke@435 1759 case JVM_CONSTANT_ClassIndex: {
duke@435 1760 *bytes = JVM_CONSTANT_Class;
duke@435 1761 idx1 = klass_index_at(idx);
duke@435 1762 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@435 1763 DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1));
duke@435 1764 break;
duke@435 1765 }
duke@435 1766 case JVM_CONSTANT_StringIndex: {
duke@435 1767 *bytes = JVM_CONSTANT_String;
duke@435 1768 idx1 = string_index_at(idx);
duke@435 1769 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@435 1770 DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1));
duke@435 1771 break;
duke@435 1772 }
coleenp@4037 1773 case JVM_CONSTANT_MethodHandle:
coleenp@4037 1774 case JVM_CONSTANT_MethodHandleInError: {
jrose@1957 1775 *bytes = JVM_CONSTANT_MethodHandle;
iklam@5760 1776 int kind = method_handle_ref_kind_at_error_ok(idx);
iklam@5760 1777 idx1 = method_handle_index_at_error_ok(idx);
jrose@1957 1778 *(bytes+1) = (unsigned char) kind;
jrose@1957 1779 Bytes::put_Java_u2((address) (bytes+2), idx1);
jrose@1957 1780 DBG(printf("JVM_CONSTANT_MethodHandle: %d %hd", kind, idx1));
jrose@1957 1781 break;
jrose@1957 1782 }
coleenp@4037 1783 case JVM_CONSTANT_MethodType:
coleenp@4037 1784 case JVM_CONSTANT_MethodTypeInError: {
jrose@1957 1785 *bytes = JVM_CONSTANT_MethodType;
iklam@5760 1786 idx1 = method_type_index_at_error_ok(idx);
jrose@1957 1787 Bytes::put_Java_u2((address) (bytes+1), idx1);
jrose@1957 1788 DBG(printf("JVM_CONSTANT_MethodType: %hd", idx1));
jrose@1957 1789 break;
jrose@1957 1790 }
jrose@2015 1791 case JVM_CONSTANT_InvokeDynamic: {
jrose@2353 1792 *bytes = tag;
jrose@2353 1793 idx1 = extract_low_short_from_int(*int_at_addr(idx));
jrose@2353 1794 idx2 = extract_high_short_from_int(*int_at_addr(idx));
jrose@2353 1795 assert(idx2 == invoke_dynamic_name_and_type_ref_index_at(idx), "correct half of u4");
jrose@2015 1796 Bytes::put_Java_u2((address) (bytes+1), idx1);
jrose@2015 1797 Bytes::put_Java_u2((address) (bytes+3), idx2);
jrose@2353 1798 DBG(printf("JVM_CONSTANT_InvokeDynamic: %hd %hd", idx1, idx2));
jrose@2015 1799 break;
jrose@2015 1800 }
duke@435 1801 }
duke@435 1802 DBG(printf("\n"));
duke@435 1803 bytes += ent_size;
duke@435 1804 size += ent_size;
duke@435 1805 }
duke@435 1806 assert(size == cpool_size, "Size mismatch");
duke@435 1807
duke@435 1808 // Keep temorarily for debugging until it's stable.
duke@435 1809 DBG(print_cpool_bytes(cnt, start_bytes));
duke@435 1810 return (int)(bytes - start_bytes);
duke@435 1811 } /* end copy_cpool_bytes */
duke@435 1812
mikael@4889 1813 #undef DBG
mikael@4889 1814
duke@435 1815
coleenp@4037 1816 void ConstantPool::set_on_stack(const bool value) {
coleenp@4490 1817 if (value) {
coleenp@4490 1818 _flags |= _on_stack;
coleenp@4490 1819 } else {
coleenp@4490 1820 _flags &= ~_on_stack;
coleenp@4490 1821 }
coleenp@4037 1822 if (value) MetadataOnStackMark::record(this);
coleenp@4037 1823 }
coleenp@4037 1824
coleenp@4037 1825 // JSR 292 support for patching constant pool oops after the class is linked and
coleenp@4037 1826 // the oop array for resolved references are created.
coleenp@4037 1827 // We can't do this during classfile parsing, which is how the other indexes are
coleenp@4037 1828 // patched. The other patches are applied early for some error checking
coleenp@4037 1829 // so only defer the pseudo_strings.
coleenp@4037 1830 void ConstantPool::patch_resolved_references(
coleenp@4037 1831 GrowableArray<Handle>* cp_patches) {
coleenp@4037 1832 assert(EnableInvokeDynamic, "");
coleenp@4037 1833 for (int index = 1; index < cp_patches->length(); index++) { // Index 0 is unused
coleenp@4037 1834 Handle patch = cp_patches->at(index);
coleenp@4037 1835 if (patch.not_null()) {
coleenp@4037 1836 assert (tag_at(index).is_string(), "should only be string left");
coleenp@4037 1837 // Patching a string means pre-resolving it.
coleenp@4037 1838 // The spelling in the constant pool is ignored.
coleenp@4037 1839 // The constant reference may be any object whatever.
coleenp@4037 1840 // If it is not a real interned string, the constant is referred
coleenp@4037 1841 // to as a "pseudo-string", and must be presented to the CP
coleenp@4037 1842 // explicitly, because it may require scavenging.
coleenp@4037 1843 int obj_index = cp_to_object_index(index);
coleenp@4037 1844 pseudo_string_at_put(index, obj_index, patch());
coleenp@4037 1845 DEBUG_ONLY(cp_patches->at_put(index, Handle());)
coleenp@4037 1846 }
coleenp@4037 1847 }
coleenp@4037 1848 #ifdef ASSERT
coleenp@4037 1849 // Ensure that all the patches have been used.
coleenp@4037 1850 for (int index = 0; index < cp_patches->length(); index++) {
coleenp@4037 1851 assert(cp_patches->at(index).is_null(),
coleenp@4037 1852 err_msg("Unused constant pool patch at %d in class file %s",
coleenp@4037 1853 index,
coleenp@4251 1854 pool_holder()->external_name()));
coleenp@4037 1855 }
coleenp@4037 1856 #endif // ASSERT
coleenp@4037 1857 }
coleenp@4037 1858
coleenp@4037 1859 #ifndef PRODUCT
coleenp@4037 1860
coleenp@4037 1861 // CompileTheWorld support. Preload all classes loaded references in the passed in constantpool
coleenp@4037 1862 void ConstantPool::preload_and_initialize_all_classes(ConstantPool* obj, TRAPS) {
coleenp@4037 1863 guarantee(obj->is_constantPool(), "object must be constant pool");
coleenp@4037 1864 constantPoolHandle cp(THREAD, (ConstantPool*)obj);
coleenp@4037 1865 guarantee(cp->pool_holder() != NULL, "must be fully loaded");
coleenp@4037 1866
coleenp@4037 1867 for (int i = 0; i< cp->length(); i++) {
coleenp@4037 1868 if (cp->tag_at(i).is_unresolved_klass()) {
coleenp@4037 1869 // This will force loading of the class
coleenp@4037 1870 Klass* klass = cp->klass_at(i, CHECK);
coleenp@4037 1871 if (klass->oop_is_instance()) {
coleenp@4037 1872 // Force initialization of class
coleenp@4037 1873 InstanceKlass::cast(klass)->initialize(CHECK);
coleenp@4037 1874 }
coleenp@4037 1875 }
coleenp@4037 1876 }
coleenp@4037 1877 }
coleenp@4037 1878
coleenp@4037 1879 #endif
coleenp@4037 1880
coleenp@4037 1881
coleenp@4037 1882 // Printing
coleenp@4037 1883
coleenp@4037 1884 void ConstantPool::print_on(outputStream* st) const {
coleenp@4037 1885 EXCEPTION_MARK;
coleenp@4037 1886 assert(is_constantPool(), "must be constantPool");
coleenp@4037 1887 st->print_cr(internal_name());
coleenp@4037 1888 if (flags() != 0) {
coleenp@4037 1889 st->print(" - flags: 0x%x", flags());
coleenp@4037 1890 if (has_preresolution()) st->print(" has_preresolution");
coleenp@4490 1891 if (on_stack()) st->print(" on_stack");
coleenp@4037 1892 st->cr();
coleenp@4037 1893 }
coleenp@4037 1894 if (pool_holder() != NULL) {
coleenp@4037 1895 st->print_cr(" - holder: " INTPTR_FORMAT, pool_holder());
coleenp@4037 1896 }
coleenp@4037 1897 st->print_cr(" - cache: " INTPTR_FORMAT, cache());
hseigel@5784 1898 st->print_cr(" - resolved_references: " INTPTR_FORMAT, (void *)resolved_references());
coleenp@4037 1899 st->print_cr(" - reference_map: " INTPTR_FORMAT, reference_map());
coleenp@4037 1900
coleenp@4037 1901 for (int index = 1; index < length(); index++) { // Index 0 is unused
coleenp@4037 1902 ((ConstantPool*)this)->print_entry_on(index, st);
coleenp@4037 1903 switch (tag_at(index).value()) {
coleenp@4037 1904 case JVM_CONSTANT_Long :
coleenp@4037 1905 case JVM_CONSTANT_Double :
coleenp@4037 1906 index++; // Skip entry following eigth-byte constant
coleenp@4037 1907 }
coleenp@4037 1908
coleenp@4037 1909 }
coleenp@4037 1910 st->cr();
coleenp@4037 1911 }
coleenp@4037 1912
coleenp@4037 1913 // Print one constant pool entry
coleenp@4037 1914 void ConstantPool::print_entry_on(const int index, outputStream* st) {
coleenp@4037 1915 EXCEPTION_MARK;
coleenp@4037 1916 st->print(" - %3d : ", index);
coleenp@4037 1917 tag_at(index).print_on(st);
coleenp@4037 1918 st->print(" : ");
coleenp@4037 1919 switch (tag_at(index).value()) {
coleenp@4037 1920 case JVM_CONSTANT_Class :
coleenp@4037 1921 { Klass* k = klass_at(index, CATCH);
morris@4782 1922 guarantee(k != NULL, "need klass");
coleenp@4037 1923 k->print_value_on(st);
coleenp@4037 1924 st->print(" {0x%lx}", (address)k);
coleenp@4037 1925 }
coleenp@4037 1926 break;
coleenp@4037 1927 case JVM_CONSTANT_Fieldref :
coleenp@4037 1928 case JVM_CONSTANT_Methodref :
coleenp@4037 1929 case JVM_CONSTANT_InterfaceMethodref :
coleenp@4037 1930 st->print("klass_index=%d", uncached_klass_ref_index_at(index));
coleenp@4037 1931 st->print(" name_and_type_index=%d", uncached_name_and_type_ref_index_at(index));
coleenp@4037 1932 break;
coleenp@4037 1933 case JVM_CONSTANT_String :
coleenp@4643 1934 if (is_pseudo_string_at(index)) {
coleenp@4643 1935 oop anObj = pseudo_string_at(index);
coleenp@4643 1936 anObj->print_value_on(st);
coleenp@4643 1937 st->print(" {0x%lx}", (address)anObj);
coleenp@4643 1938 } else {
coleenp@4643 1939 unresolved_string_at(index)->print_value_on(st);
coleenp@4643 1940 }
coleenp@4037 1941 break;
coleenp@4037 1942 case JVM_CONSTANT_Integer :
coleenp@4037 1943 st->print("%d", int_at(index));
coleenp@4037 1944 break;
coleenp@4037 1945 case JVM_CONSTANT_Float :
coleenp@4037 1946 st->print("%f", float_at(index));
coleenp@4037 1947 break;
coleenp@4037 1948 case JVM_CONSTANT_Long :
coleenp@4037 1949 st->print_jlong(long_at(index));
coleenp@4037 1950 break;
coleenp@4037 1951 case JVM_CONSTANT_Double :
coleenp@4037 1952 st->print("%lf", double_at(index));
coleenp@4037 1953 break;
coleenp@4037 1954 case JVM_CONSTANT_NameAndType :
coleenp@4037 1955 st->print("name_index=%d", name_ref_index_at(index));
coleenp@4037 1956 st->print(" signature_index=%d", signature_ref_index_at(index));
coleenp@4037 1957 break;
coleenp@4037 1958 case JVM_CONSTANT_Utf8 :
coleenp@4037 1959 symbol_at(index)->print_value_on(st);
coleenp@4037 1960 break;
coleenp@4037 1961 case JVM_CONSTANT_UnresolvedClass : // fall-through
coleenp@4037 1962 case JVM_CONSTANT_UnresolvedClassInError: {
coleenp@4037 1963 // unresolved_klass_at requires lock or safe world.
coleenp@4037 1964 CPSlot entry = slot_at(index);
coleenp@4037 1965 if (entry.is_resolved()) {
coleenp@4037 1966 entry.get_klass()->print_value_on(st);
coleenp@4037 1967 } else {
coleenp@4037 1968 entry.get_symbol()->print_value_on(st);
coleenp@4037 1969 }
coleenp@4037 1970 }
coleenp@4037 1971 break;
coleenp@4037 1972 case JVM_CONSTANT_MethodHandle :
coleenp@4037 1973 case JVM_CONSTANT_MethodHandleInError :
iklam@5760 1974 st->print("ref_kind=%d", method_handle_ref_kind_at_error_ok(index));
iklam@5760 1975 st->print(" ref_index=%d", method_handle_index_at_error_ok(index));
coleenp@4037 1976 break;
coleenp@4037 1977 case JVM_CONSTANT_MethodType :
coleenp@4037 1978 case JVM_CONSTANT_MethodTypeInError :
iklam@5760 1979 st->print("signature_index=%d", method_type_index_at_error_ok(index));
coleenp@4037 1980 break;
coleenp@4037 1981 case JVM_CONSTANT_InvokeDynamic :
coleenp@4037 1982 {
coleenp@4037 1983 st->print("bootstrap_method_index=%d", invoke_dynamic_bootstrap_method_ref_index_at(index));
coleenp@4037 1984 st->print(" name_and_type_index=%d", invoke_dynamic_name_and_type_ref_index_at(index));
coleenp@4037 1985 int argc = invoke_dynamic_argument_count_at(index);
coleenp@4037 1986 if (argc > 0) {
coleenp@4037 1987 for (int arg_i = 0; arg_i < argc; arg_i++) {
coleenp@4037 1988 int arg = invoke_dynamic_argument_index_at(index, arg_i);
coleenp@4037 1989 st->print((arg_i == 0 ? " arguments={%d" : ", %d"), arg);
coleenp@4037 1990 }
coleenp@4037 1991 st->print("}");
coleenp@4037 1992 }
coleenp@4037 1993 }
coleenp@4037 1994 break;
coleenp@4037 1995 default:
coleenp@4037 1996 ShouldNotReachHere();
coleenp@4037 1997 break;
coleenp@4037 1998 }
coleenp@4037 1999 st->cr();
coleenp@4037 2000 }
coleenp@4037 2001
coleenp@4037 2002 void ConstantPool::print_value_on(outputStream* st) const {
coleenp@4037 2003 assert(is_constantPool(), "must be constantPool");
coleenp@4037 2004 st->print("constant pool [%d]", length());
coleenp@4037 2005 if (has_preresolution()) st->print("/preresolution");
coleenp@4037 2006 if (operands() != NULL) st->print("/operands[%d]", operands()->length());
coleenp@4037 2007 print_address_on(st);
coleenp@4037 2008 st->print(" for ");
coleenp@4037 2009 pool_holder()->print_value_on(st);
coleenp@4037 2010 if (pool_holder() != NULL) {
coleenp@4251 2011 bool extra = (pool_holder()->constants() != this);
coleenp@4037 2012 if (extra) st->print(" (extra)");
coleenp@4037 2013 }
coleenp@4037 2014 if (cache() != NULL) {
coleenp@4037 2015 st->print(" cache=" PTR_FORMAT, cache());
coleenp@4037 2016 }
coleenp@4037 2017 }
coleenp@4037 2018
acorn@4497 2019 #if INCLUDE_SERVICES
acorn@4497 2020 // Size Statistics
acorn@4497 2021 void ConstantPool::collect_statistics(KlassSizeStats *sz) const {
acorn@4497 2022 sz->_cp_all_bytes += (sz->_cp_bytes = sz->count(this));
acorn@4497 2023 sz->_cp_all_bytes += (sz->_cp_tags_bytes = sz->count_array(tags()));
acorn@4497 2024 sz->_cp_all_bytes += (sz->_cp_cache_bytes = sz->count(cache()));
acorn@4497 2025 sz->_cp_all_bytes += (sz->_cp_operands_bytes = sz->count_array(operands()));
acorn@4497 2026 sz->_cp_all_bytes += (sz->_cp_refmap_bytes = sz->count_array(reference_map()));
acorn@4497 2027
acorn@4497 2028 sz->_ro_bytes += sz->_cp_operands_bytes + sz->_cp_tags_bytes +
acorn@4497 2029 sz->_cp_refmap_bytes;
acorn@4497 2030 sz->_rw_bytes += sz->_cp_bytes + sz->_cp_cache_bytes;
acorn@4497 2031 }
acorn@4497 2032 #endif // INCLUDE_SERVICES
coleenp@4037 2033
coleenp@4037 2034 // Verification
coleenp@4037 2035
coleenp@4037 2036 void ConstantPool::verify_on(outputStream* st) {
coleenp@4037 2037 guarantee(is_constantPool(), "object must be constant pool");
coleenp@4037 2038 for (int i = 0; i< length(); i++) {
coleenp@4037 2039 constantTag tag = tag_at(i);
coleenp@4037 2040 CPSlot entry = slot_at(i);
coleenp@4037 2041 if (tag.is_klass()) {
coleenp@4037 2042 if (entry.is_resolved()) {
coleenp@4037 2043 guarantee(entry.get_klass()->is_klass(), "should be klass");
coleenp@4037 2044 }
coleenp@4037 2045 } else if (tag.is_unresolved_klass()) {
coleenp@4037 2046 if (entry.is_resolved()) {
coleenp@4037 2047 guarantee(entry.get_klass()->is_klass(), "should be klass");
coleenp@4037 2048 }
coleenp@4037 2049 } else if (tag.is_symbol()) {
coleenp@4037 2050 guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count");
coleenp@4037 2051 } else if (tag.is_string()) {
coleenp@4037 2052 guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count");
coleenp@4037 2053 }
coleenp@4037 2054 }
coleenp@4037 2055 if (cache() != NULL) {
coleenp@4037 2056 // Note: cache() can be NULL before a class is completely setup or
coleenp@4037 2057 // in temporary constant pools used during constant pool merging
coleenp@4037 2058 guarantee(cache()->is_constantPoolCache(), "should be constant pool cache");
coleenp@4037 2059 }
coleenp@4037 2060 if (pool_holder() != NULL) {
coleenp@4037 2061 // Note: pool_holder() can be NULL in temporary constant pools
coleenp@4037 2062 // used during constant pool merging
coleenp@4037 2063 guarantee(pool_holder()->is_klass(), "should be klass");
coleenp@4037 2064 }
coleenp@4037 2065 }
coleenp@4037 2066
coleenp@4037 2067
coleenp@2497 2068 void SymbolHashMap::add_entry(Symbol* sym, u2 value) {
duke@435 2069 char *str = sym->as_utf8();
duke@435 2070 unsigned int hash = compute_hash(str, sym->utf8_length());
duke@435 2071 unsigned int index = hash % table_size();
duke@435 2072
duke@435 2073 // check if already in map
duke@435 2074 // we prefer the first entry since it is more likely to be what was used in
duke@435 2075 // the class file
duke@435 2076 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) {
duke@435 2077 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@435 2078 if (en->hash() == hash && en->symbol() == sym) {
duke@435 2079 return; // already there
duke@435 2080 }
duke@435 2081 }
duke@435 2082
duke@435 2083 SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value);
duke@435 2084 entry->set_next(bucket(index));
duke@435 2085 _buckets[index].set_entry(entry);
duke@435 2086 assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@435 2087 }
duke@435 2088
coleenp@2497 2089 SymbolHashMapEntry* SymbolHashMap::find_entry(Symbol* sym) {
duke@435 2090 assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL");
duke@435 2091 char *str = sym->as_utf8();
duke@435 2092 int len = sym->utf8_length();
duke@435 2093 unsigned int hash = SymbolHashMap::compute_hash(str, len);
duke@435 2094 unsigned int index = hash % table_size();
duke@435 2095 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) {
duke@435 2096 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@435 2097 if (en->hash() == hash && en->symbol() == sym) {
duke@435 2098 return en;
duke@435 2099 }
duke@435 2100 }
duke@435 2101 return NULL;
duke@435 2102 }

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