annotate src/share/vm/oops/constantPool.cpp @ 5743:fc7177e457bf

Merge
author henryjen
date Mon, 11 Nov 2013 23:16:56 -0800
parents b8860472c377 36b4e9b30322
children
rev   line source
duke@0 1 /*
coleenp@4108 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
duke@0 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@0 4 *
duke@0 5 * This code is free software; you can redistribute it and/or modify it
duke@0 6 * under the terms of the GNU General Public License version 2 only, as
duke@0 7 * published by the Free Software Foundation.
duke@0 8 *
duke@0 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@0 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@0 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@0 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@0 13 * accompanied this code).
duke@0 14 *
duke@0 15 * You should have received a copy of the GNU General Public License version
duke@0 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@0 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@0 18 *
trims@1472 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1472 20 * or visit www.oracle.com if you need additional information or have any
trims@1472 21 * questions.
duke@0 22 *
duke@0 23 */
duke@0 24
stefank@1885 25 #include "precompiled.hpp"
coleenp@3656 26 #include "classfile/classLoaderData.hpp"
stefank@1885 27 #include "classfile/javaClasses.hpp"
coleenp@4132 28 #include "classfile/metadataOnStackMark.hpp"
stefank@1885 29 #include "classfile/symbolTable.hpp"
stefank@1885 30 #include "classfile/systemDictionary.hpp"
stefank@1885 31 #include "classfile/vmSymbols.hpp"
stefank@1885 32 #include "interpreter/linkResolver.hpp"
acorn@4139 33 #include "memory/heapInspection.hpp"
coleenp@3656 34 #include "memory/metadataFactory.hpp"
stefank@1885 35 #include "memory/oopFactory.hpp"
coleenp@3656 36 #include "oops/constantPool.hpp"
stefank@1885 37 #include "oops/instanceKlass.hpp"
stefank@1885 38 #include "oops/objArrayKlass.hpp"
stefank@1885 39 #include "runtime/fieldType.hpp"
stefank@1885 40 #include "runtime/init.hpp"
coleenp@3656 41 #include "runtime/javaCalls.hpp"
stefank@1885 42 #include "runtime/signature.hpp"
stefank@1885 43 #include "runtime/vframe.hpp"
duke@0 44
coleenp@3656 45 ConstantPool* ConstantPool::allocate(ClassLoaderData* loader_data, int length, TRAPS) {
coleenp@3656 46 // Tags are RW but comment below applies to tags also.
coleenp@3656 47 Array<u1>* tags = MetadataFactory::new_writeable_array<u1>(loader_data, length, 0, CHECK_NULL);
coleenp@3656 48
coleenp@3656 49 int size = ConstantPool::size(length);
coleenp@3656 50
coleenp@3656 51 // CDS considerations:
coleenp@3656 52 // Allocate read-write but may be able to move to read-only at dumping time
coleenp@3656 53 // if all the klasses are resolved. The only other field that is writable is
coleenp@3656 54 // the resolved_references array, which is recreated at startup time.
coleenp@3656 55 // But that could be moved to InstanceKlass (although a pain to access from
coleenp@3656 56 // assembly code). Maybe it could be moved to the cpCache which is RW.
iklam@4873 57 return new (loader_data, size, false, MetaspaceObj::ConstantPoolType, THREAD) ConstantPool(tags);
coleenp@3656 58 }
coleenp@3656 59
coleenp@3656 60 ConstantPool::ConstantPool(Array<u1>* tags) {
coleenp@3656 61 set_length(tags->length());
coleenp@3656 62 set_tags(NULL);
coleenp@3656 63 set_cache(NULL);
coleenp@3656 64 set_reference_map(NULL);
coleenp@3656 65 set_resolved_references(NULL);
coleenp@3656 66 set_operands(NULL);
coleenp@3656 67 set_pool_holder(NULL);
coleenp@3656 68 set_flags(0);
coleenp@4132 69
coleenp@3656 70 // only set to non-zero if constant pool is merged by RedefineClasses
coleenp@4108 71 set_version(0);
iklam@5658 72 set_lock(new Monitor(Monitor::nonleaf + 2, "A constant pool lock"));
coleenp@3656 73
coleenp@3656 74 // initialize tag array
coleenp@3656 75 int length = tags->length();
coleenp@3656 76 for (int index = 0; index < length; index++) {
coleenp@3656 77 tags->at_put(index, JVM_CONSTANT_Invalid);
coleenp@3656 78 }
coleenp@3656 79 set_tags(tags);
coleenp@3656 80 }
coleenp@3656 81
coleenp@3656 82 void ConstantPool::deallocate_contents(ClassLoaderData* loader_data) {
coleenp@3656 83 MetadataFactory::free_metadata(loader_data, cache());
coleenp@3656 84 set_cache(NULL);
coleenp@3656 85 MetadataFactory::free_array<jushort>(loader_data, operands());
coleenp@3656 86 set_operands(NULL);
coleenp@3656 87
coleenp@3656 88 release_C_heap_structures();
coleenp@3656 89
coleenp@3656 90 // free tag array
coleenp@3656 91 MetadataFactory::free_array<u1>(loader_data, tags());
coleenp@3656 92 set_tags(NULL);
coleenp@3656 93 }
coleenp@3656 94
coleenp@3656 95 void ConstantPool::release_C_heap_structures() {
coleenp@3656 96 // walk constant pool and decrement symbol reference counts
coleenp@3656 97 unreference_symbols();
iklam@5658 98
iklam@5658 99 delete _lock;
iklam@5658 100 set_lock(NULL);
coleenp@3656 101 }
coleenp@3656 102
coleenp@3656 103 objArrayOop ConstantPool::resolved_references() const {
coleenp@3656 104 return (objArrayOop)JNIHandles::resolve(_resolved_references);
coleenp@3656 105 }
coleenp@3656 106
coleenp@3656 107 // Create resolved_references array and mapping array for original cp indexes
coleenp@3656 108 // The ldc bytecode was rewritten to have the resolved reference array index so need a way
coleenp@3656 109 // to map it back for resolving and some unlikely miscellaneous uses.
coleenp@3656 110 // The objects created by invokedynamic are appended to this list.
coleenp@3656 111 void ConstantPool::initialize_resolved_references(ClassLoaderData* loader_data,
coleenp@3656 112 intStack reference_map,
coleenp@3656 113 int constant_pool_map_length,
coleenp@5435 114 TRAPS) {
coleenp@3656 115 // Initialized the resolved object cache.
coleenp@3656 116 int map_length = reference_map.length();
coleenp@3656 117 if (map_length > 0) {
coleenp@3656 118 // Only need mapping back to constant pool entries. The map isn't used for
coleenp@5435 119 // invokedynamic resolved_reference entries. For invokedynamic entries,
coleenp@5435 120 // the constant pool cache index has the mapping back to both the constant
coleenp@5435 121 // pool and to the resolved reference index.
coleenp@3656 122 if (constant_pool_map_length > 0) {
coleenp@5435 123 Array<u2>* om = MetadataFactory::new_array<u2>(loader_data, constant_pool_map_length, CHECK);
coleenp@3656 124
coleenp@3656 125 for (int i = 0; i < constant_pool_map_length; i++) {
coleenp@3656 126 int x = reference_map.at(i);
coleenp@3656 127 assert(x == (int)(jushort) x, "klass index is too big");
coleenp@3656 128 om->at_put(i, (jushort)x);
coleenp@3656 129 }
coleenp@3656 130 set_reference_map(om);
coleenp@3656 131 }
coleenp@3656 132
coleenp@3656 133 // Create Java array for holding resolved strings, methodHandles,
coleenp@3656 134 // methodTypes, invokedynamic and invokehandle appendix objects, etc.
coleenp@3656 135 objArrayOop stom = oopFactory::new_objArray(SystemDictionary::Object_klass(), map_length, CHECK);
coleenp@3656 136 Handle refs_handle (THREAD, (oop)stom); // must handleize.
coleenp@3656 137 set_resolved_references(loader_data->add_handle(refs_handle));
coleenp@3656 138 }
coleenp@3656 139 }
coleenp@3656 140
coleenp@3656 141 // CDS support. Create a new resolved_references array.
coleenp@3656 142 void ConstantPool::restore_unshareable_info(TRAPS) {
coleenp@3664 143
coleenp@3664 144 // restore the C++ vtable from the shared archive
coleenp@3664 145 restore_vtable();
coleenp@3664 146
coleenp@3656 147 if (SystemDictionary::Object_klass_loaded()) {
coleenp@3656 148 // Recreate the object array and add to ClassLoaderData.
coleenp@3656 149 int map_length = resolved_reference_length();
coleenp@3656 150 if (map_length > 0) {
coleenp@3656 151 objArrayOop stom = oopFactory::new_objArray(SystemDictionary::Object_klass(), map_length, CHECK);
coleenp@3656 152 Handle refs_handle (THREAD, (oop)stom); // must handleize.
coleenp@3656 153
coleenp@3656 154 ClassLoaderData* loader_data = pool_holder()->class_loader_data();
coleenp@3656 155 set_resolved_references(loader_data->add_handle(refs_handle));
coleenp@3656 156 }
iklam@5658 157
iklam@5658 158 // Also need to recreate the mutex. Make sure this matches the constructor
iklam@5658 159 set_lock(new Monitor(Monitor::nonleaf + 2, "A constant pool lock"));
coleenp@3656 160 }
coleenp@3656 161 }
coleenp@3656 162
coleenp@3656 163 void ConstantPool::remove_unshareable_info() {
coleenp@3656 164 // Resolved references are not in the shared archive.
coleenp@3656 165 // Save the length for restoration. It is not necessarily the same length
coleenp@3656 166 // as reference_map.length() if invokedynamic is saved.
coleenp@3656 167 set_resolved_reference_length(
coleenp@3656 168 resolved_references() != NULL ? resolved_references()->length() : 0);
coleenp@3656 169 set_resolved_references(NULL);
iklam@5658 170 set_lock(NULL);
coleenp@3656 171 }
coleenp@3656 172
coleenp@3656 173 int ConstantPool::cp_to_object_index(int cp_index) {
coleenp@3656 174 // this is harder don't do this so much.
coleenp@5435 175 int i = reference_map()->find(cp_index);
coleenp@5435 176 // We might not find the index for jsr292 call.
coleenp@5435 177 return (i < 0) ? _no_index_sentinel : i;
coleenp@3656 178 }
coleenp@3656 179
coleenp@3656 180 Klass* ConstantPool::klass_at_impl(constantPoolHandle this_oop, int which, TRAPS) {
coleenp@3656 181 // A resolved constantPool entry will contain a Klass*, otherwise a Symbol*.
duke@0 182 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and
duke@0 183 // tag is not updated atomicly.
coleenp@3656 184
coleenp@2069 185 CPSlot entry = this_oop->slot_at(which);
coleenp@3656 186 if (entry.is_resolved()) {
coleenp@3656 187 assert(entry.get_klass()->is_klass(), "must be");
duke@0 188 // Already resolved - return entry.
coleenp@3656 189 return entry.get_klass();
duke@0 190 }
duke@0 191
duke@0 192 // Acquire lock on constant oop while doing update. After we get the lock, we check if another object
duke@0 193 // already has updated the object
duke@0 194 assert(THREAD->is_Java_thread(), "must be a Java thread");
duke@0 195 bool do_resolve = false;
duke@0 196 bool in_error = false;
duke@0 197
coleenp@3656 198 // Create a handle for the mirror. This will preserve the resolved class
coleenp@3656 199 // until the loader_data is registered.
coleenp@3656 200 Handle mirror_handle;
coleenp@3656 201
coleenp@2069 202 Symbol* name = NULL;
duke@0 203 Handle loader;
iklam@5658 204 { MonitorLockerEx ml(this_oop->lock());
duke@0 205
duke@0 206 if (this_oop->tag_at(which).is_unresolved_klass()) {
duke@0 207 if (this_oop->tag_at(which).is_unresolved_klass_in_error()) {
duke@0 208 in_error = true;
duke@0 209 } else {
duke@0 210 do_resolve = true;
coleenp@2069 211 name = this_oop->unresolved_klass_at(which);
coleenp@3880 212 loader = Handle(THREAD, this_oop->pool_holder()->class_loader());
duke@0 213 }
duke@0 214 }
duke@0 215 } // unlocking constantPool
duke@0 216
duke@0 217
duke@0 218 // The original attempt to resolve this constant pool entry failed so find the
duke@0 219 // original error and throw it again (JVMS 5.4.3).
duke@0 220 if (in_error) {
coleenp@2069 221 Symbol* error = SystemDictionary::find_resolution_error(this_oop, which);
coleenp@2069 222 guarantee(error != (Symbol*)NULL, "tag mismatch with resolution error table");
duke@0 223 ResourceMark rm;
duke@0 224 // exception text will be the class name
duke@0 225 const char* className = this_oop->unresolved_klass_at(which)->as_C_string();
duke@0 226 THROW_MSG_0(error, className);
duke@0 227 }
duke@0 228
duke@0 229 if (do_resolve) {
duke@0 230 // this_oop must be unlocked during resolve_or_fail
coleenp@3880 231 oop protection_domain = this_oop->pool_holder()->protection_domain();
duke@0 232 Handle h_prot (THREAD, protection_domain);
coleenp@3656 233 Klass* k_oop = SystemDictionary::resolve_or_fail(name, loader, h_prot, true, THREAD);
duke@0 234 KlassHandle k;
duke@0 235 if (!HAS_PENDING_EXCEPTION) {
duke@0 236 k = KlassHandle(THREAD, k_oop);
coleenp@3656 237 // preserve the resolved klass.
coleenp@3656 238 mirror_handle = Handle(THREAD, k_oop->java_mirror());
duke@0 239 // Do access check for klasses
duke@0 240 verify_constant_pool_resolve(this_oop, k, THREAD);
duke@0 241 }
duke@0 242
duke@0 243 // Failed to resolve class. We must record the errors so that subsequent attempts
duke@0 244 // to resolve this constant pool entry fail with the same error (JVMS 5.4.3).
duke@0 245 if (HAS_PENDING_EXCEPTION) {
duke@0 246 ResourceMark rm;
coleenp@3656 247 Symbol* error = PENDING_EXCEPTION->klass()->name();
duke@0 248
duke@0 249 bool throw_orig_error = false;
duke@0 250 {
iklam@5658 251 MonitorLockerEx ml(this_oop->lock());
duke@0 252
duke@0 253 // some other thread has beaten us and has resolved the class.
duke@0 254 if (this_oop->tag_at(which).is_klass()) {
duke@0 255 CLEAR_PENDING_EXCEPTION;
duke@0 256 entry = this_oop->resolved_klass_at(which);
coleenp@3656 257 return entry.get_klass();
duke@0 258 }
duke@0 259
duke@0 260 if (!PENDING_EXCEPTION->
never@1142 261 is_a(SystemDictionary::LinkageError_klass())) {
duke@0 262 // Just throw the exception and don't prevent these classes from
duke@0 263 // being loaded due to virtual machine errors like StackOverflow
duke@0 264 // and OutOfMemoryError, etc, or if the thread was hit by stop()
duke@0 265 // Needs clarification to section 5.4.3 of the VM spec (see 6308271)
duke@0 266 }
duke@0 267 else if (!this_oop->tag_at(which).is_unresolved_klass_in_error()) {
duke@0 268 SystemDictionary::add_resolution_error(this_oop, which, error);
duke@0 269 this_oop->tag_at_put(which, JVM_CONSTANT_UnresolvedClassInError);
duke@0 270 } else {
duke@0 271 // some other thread has put the class in error state.
coleenp@2069 272 error = SystemDictionary::find_resolution_error(this_oop, which);
coleenp@2069 273 assert(error != NULL, "checking");
duke@0 274 throw_orig_error = true;
duke@0 275 }
duke@0 276 } // unlocked
duke@0 277
duke@0 278 if (throw_orig_error) {
duke@0 279 CLEAR_PENDING_EXCEPTION;
duke@0 280 ResourceMark rm;
duke@0 281 const char* className = this_oop->unresolved_klass_at(which)->as_C_string();
duke@0 282 THROW_MSG_0(error, className);
duke@0 283 }
duke@0 284
duke@0 285 return 0;
duke@0 286 }
duke@0 287
coleenp@3656 288 if (TraceClassResolution && !k()->oop_is_array()) {
duke@0 289 // skip resolving the constant pool so that this code get's
duke@0 290 // called the next time some bytecodes refer to this class.
duke@0 291 ResourceMark rm;
duke@0 292 int line_number = -1;
duke@0 293 const char * source_file = NULL;
duke@0 294 if (JavaThread::current()->has_last_Java_frame()) {
duke@0 295 // try to identify the method which called this function.
duke@0 296 vframeStream vfst(JavaThread::current());
duke@0 297 if (!vfst.at_end()) {
duke@0 298 line_number = vfst.method()->line_number_from_bci(vfst.bci());
coleenp@3880 299 Symbol* s = vfst.method()->method_holder()->source_file_name();
duke@0 300 if (s != NULL) {
duke@0 301 source_file = s->as_C_string();
duke@0 302 }
duke@0 303 }
duke@0 304 }
duke@0 305 if (k() != this_oop->pool_holder()) {
duke@0 306 // only print something if the classes are different
duke@0 307 if (source_file != NULL) {
duke@0 308 tty->print("RESOLVE %s %s %s:%d\n",
coleenp@3880 309 this_oop->pool_holder()->external_name(),
coleenp@3656 310 InstanceKlass::cast(k())->external_name(), source_file, line_number);
duke@0 311 } else {
duke@0 312 tty->print("RESOLVE %s %s\n",
coleenp@3880 313 this_oop->pool_holder()->external_name(),
coleenp@3656 314 InstanceKlass::cast(k())->external_name());
duke@0 315 }
duke@0 316 }
duke@0 317 return k();
duke@0 318 } else {
iklam@5658 319 MonitorLockerEx ml(this_oop->lock());
duke@0 320 // Only updated constant pool - if it is resolved.
duke@0 321 do_resolve = this_oop->tag_at(which).is_unresolved_klass();
duke@0 322 if (do_resolve) {
coleenp@3880 323 ClassLoaderData* this_key = this_oop->pool_holder()->class_loader_data();
coleenp@3936 324 this_key->record_dependency(k(), CHECK_NULL); // Can throw OOM
duke@0 325 this_oop->klass_at_put(which, k());
duke@0 326 }
duke@0 327 }
duke@0 328 }
duke@0 329
duke@0 330 entry = this_oop->resolved_klass_at(which);
coleenp@3656 331 assert(entry.is_resolved() && entry.get_klass()->is_klass(), "must be resolved at this point");
coleenp@3656 332 return entry.get_klass();
duke@0 333 }
duke@0 334
duke@0 335
coleenp@3656 336 // Does not update ConstantPool* - to avoid any exception throwing. Used
duke@0 337 // by compiler and exception handling. Also used to avoid classloads for
duke@0 338 // instanceof operations. Returns NULL if the class has not been loaded or
duke@0 339 // if the verification of constant pool failed
coleenp@3656 340 Klass* ConstantPool::klass_at_if_loaded(constantPoolHandle this_oop, int which) {
coleenp@2069 341 CPSlot entry = this_oop->slot_at(which);
coleenp@3656 342 if (entry.is_resolved()) {
coleenp@3656 343 assert(entry.get_klass()->is_klass(), "must be");
coleenp@3656 344 return entry.get_klass();
duke@0 345 } else {
coleenp@3656 346 assert(entry.is_unresolved(), "must be either symbol or klass");
duke@0 347 Thread *thread = Thread::current();
coleenp@2069 348 Symbol* name = entry.get_symbol();
coleenp@3880 349 oop loader = this_oop->pool_holder()->class_loader();
coleenp@3880 350 oop protection_domain = this_oop->pool_holder()->protection_domain();
duke@0 351 Handle h_prot (thread, protection_domain);
duke@0 352 Handle h_loader (thread, loader);
coleenp@3656 353 Klass* k = SystemDictionary::find(name, h_loader, h_prot, thread);
duke@0 354
duke@0 355 if (k != NULL) {
duke@0 356 // Make sure that resolving is legal
duke@0 357 EXCEPTION_MARK;
duke@0 358 KlassHandle klass(THREAD, k);
duke@0 359 // return NULL if verification fails
duke@0 360 verify_constant_pool_resolve(this_oop, klass, THREAD);
duke@0 361 if (HAS_PENDING_EXCEPTION) {
duke@0 362 CLEAR_PENDING_EXCEPTION;
duke@0 363 return NULL;
duke@0 364 }
duke@0 365 return klass();
duke@0 366 } else {
duke@0 367 return k;
duke@0 368 }
duke@0 369 }
duke@0 370 }
duke@0 371
duke@0 372
coleenp@3656 373 Klass* ConstantPool::klass_ref_at_if_loaded(constantPoolHandle this_oop, int which) {
duke@0 374 return klass_at_if_loaded(this_oop, this_oop->klass_ref_index_at(which));
duke@0 375 }
duke@0 376
duke@0 377
coleenp@3656 378 Method* ConstantPool::method_at_if_loaded(constantPoolHandle cpool,
twisti@3582 379 int which) {
brutisso@3067 380 if (cpool->cache() == NULL) return NULL; // nothing to load yet
coleenp@3656 381 int cache_index = decode_cpcache_index(which, true);
jrose@2557 382 if (!(cache_index >= 0 && cache_index < cpool->cache()->length())) {
coleenp@3656 383 // FIXME: should be an assert
jrose@2557 384 if (PrintMiscellaneous && (Verbose||WizardMode)) {
twisti@3582 385 tty->print_cr("bad operand %d in:", which); cpool->print();
jrose@2557 386 }
jrose@2557 387 return NULL;
jrose@2557 388 }
jrose@2557 389 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
twisti@3582 390 return e->method_if_resolved(cpool);
twisti@3582 391 }
twisti@3582 392
twisti@3582 393
coleenp@3656 394 bool ConstantPool::has_appendix_at_if_loaded(constantPoolHandle cpool, int which) {
twisti@3582 395 if (cpool->cache() == NULL) return false; // nothing to load yet
coleenp@3656 396 int cache_index = decode_cpcache_index(which, true);
coleenp@3656 397 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
twisti@3582 398 return e->has_appendix();
twisti@3582 399 }
twisti@3582 400
coleenp@3656 401 oop ConstantPool::appendix_at_if_loaded(constantPoolHandle cpool, int which) {
twisti@3582 402 if (cpool->cache() == NULL) return NULL; // nothing to load yet
coleenp@3656 403 int cache_index = decode_cpcache_index(which, true);
coleenp@3656 404 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
coleenp@3656 405 return e->appendix_if_resolved(cpool);
jrose@2557 406 }
jrose@2557 407
jrose@2557 408
twisti@3753 409 bool ConstantPool::has_method_type_at_if_loaded(constantPoolHandle cpool, int which) {
twisti@3753 410 if (cpool->cache() == NULL) return false; // nothing to load yet
twisti@3753 411 int cache_index = decode_cpcache_index(which, true);
twisti@3753 412 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
twisti@3753 413 return e->has_method_type();
twisti@3753 414 }
twisti@3753 415
twisti@3753 416 oop ConstantPool::method_type_at_if_loaded(constantPoolHandle cpool, int which) {
twisti@3753 417 if (cpool->cache() == NULL) return NULL; // nothing to load yet
twisti@3753 418 int cache_index = decode_cpcache_index(which, true);
twisti@3753 419 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
twisti@3753 420 return e->method_type_if_resolved(cpool);
twisti@3753 421 }
twisti@3753 422
twisti@3753 423
coleenp@3656 424 Symbol* ConstantPool::impl_name_ref_at(int which, bool uncached) {
jrose@726 425 int name_index = name_ref_index_at(impl_name_and_type_ref_index_at(which, uncached));
duke@0 426 return symbol_at(name_index);
duke@0 427 }
duke@0 428
duke@0 429
coleenp@3656 430 Symbol* ConstantPool::impl_signature_ref_at(int which, bool uncached) {
jrose@726 431 int signature_index = signature_ref_index_at(impl_name_and_type_ref_index_at(which, uncached));
duke@0 432 return symbol_at(signature_index);
duke@0 433 }
duke@0 434
duke@0 435
coleenp@3656 436 int ConstantPool::impl_name_and_type_ref_index_at(int which, bool uncached) {
jrose@1059 437 int i = which;
jrose@1059 438 if (!uncached && cache() != NULL) {
coleenp@3656 439 if (ConstantPool::is_invokedynamic_index(which)) {
coleenp@3656 440 // Invokedynamic index is index into resolved_references
coleenp@3656 441 int pool_index = invokedynamic_cp_cache_entry_at(which)->constant_pool_index();
jrose@2316 442 pool_index = invoke_dynamic_name_and_type_ref_index_at(pool_index);
jrose@1583 443 assert(tag_at(pool_index).is_name_and_type(), "");
jrose@1583 444 return pool_index;
jrose@1583 445 }
jrose@1059 446 // change byte-ordering and go via cache
jrose@1059 447 i = remap_instruction_operand_from_cache(which);
jrose@1059 448 } else {
jrose@1838 449 if (tag_at(which).is_invoke_dynamic()) {
jrose@1838 450 int pool_index = invoke_dynamic_name_and_type_ref_index_at(which);
jrose@1838 451 assert(tag_at(pool_index).is_name_and_type(), "");
jrose@1838 452 return pool_index;
jrose@1838 453 }
jrose@1059 454 }
jrose@1059 455 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool");
jrose@1838 456 assert(!tag_at(i).is_invoke_dynamic(), "Must be handled above");
jrose@1059 457 jint ref_index = *int_at_addr(i);
duke@0 458 return extract_high_short_from_int(ref_index);
duke@0 459 }
duke@0 460
duke@0 461
coleenp@3656 462 int ConstantPool::impl_klass_ref_index_at(int which, bool uncached) {
coleenp@3656 463 guarantee(!ConstantPool::is_invokedynamic_index(which),
jrose@1059 464 "an invokedynamic instruction does not have a klass");
jrose@1059 465 int i = which;
jrose@1059 466 if (!uncached && cache() != NULL) {
jrose@1059 467 // change byte-ordering and go via cache
jrose@1059 468 i = remap_instruction_operand_from_cache(which);
jrose@1059 469 }
jrose@1059 470 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool");
jrose@1059 471 jint ref_index = *int_at_addr(i);
duke@0 472 return extract_low_short_from_int(ref_index);
duke@0 473 }
duke@0 474
duke@0 475
jrose@726 476
coleenp@3656 477 int ConstantPool::remap_instruction_operand_from_cache(int operand) {
jrose@1486 478 int cpc_index = operand;
jrose@1486 479 DEBUG_ONLY(cpc_index -= CPCACHE_INDEX_TAG);
jrose@1486 480 assert((int)(u2)cpc_index == cpc_index, "clean u2");
jrose@1059 481 int member_index = cache()->entry_at(cpc_index)->constant_pool_index();
jrose@1059 482 return member_index;
jrose@726 483 }
jrose@726 484
jrose@726 485
coleenp@3656 486 void ConstantPool::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) {
duke@0 487 if (k->oop_is_instance() || k->oop_is_objArray()) {
duke@0 488 instanceKlassHandle holder (THREAD, this_oop->pool_holder());
coleenp@3764 489 Klass* elem_oop = k->oop_is_instance() ? k() : ObjArrayKlass::cast(k())->bottom_klass();
duke@0 490 KlassHandle element (THREAD, elem_oop);
duke@0 491
duke@0 492 // The element type could be a typeArray - we only need the access check if it is
duke@0 493 // an reference to another class
duke@0 494 if (element->oop_is_instance()) {
duke@0 495 LinkResolver::check_klass_accessability(holder, element, CHECK);
duke@0 496 }
duke@0 497 }
duke@0 498 }
duke@0 499
duke@0 500
coleenp@3656 501 int ConstantPool::name_ref_index_at(int which_nt) {
jrose@726 502 jint ref_index = name_and_type_at(which_nt);
duke@0 503 return extract_low_short_from_int(ref_index);
duke@0 504 }
duke@0 505
duke@0 506
coleenp@3656 507 int ConstantPool::signature_ref_index_at(int which_nt) {
jrose@726 508 jint ref_index = name_and_type_at(which_nt);
duke@0 509 return extract_high_short_from_int(ref_index);
duke@0 510 }
duke@0 511
duke@0 512
coleenp@3656 513 Klass* ConstantPool::klass_ref_at(int which, TRAPS) {
duke@0 514 return klass_at(klass_ref_index_at(which), CHECK_NULL);
duke@0 515 }
duke@0 516
duke@0 517
coleenp@3656 518 Symbol* ConstantPool::klass_name_at(int which) {
duke@0 519 assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(),
duke@0 520 "Corrupted constant pool");
coleenp@3656 521 // A resolved constantPool entry will contain a Klass*, otherwise a Symbol*.
duke@0 522 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and
duke@0 523 // tag is not updated atomicly.
coleenp@2069 524 CPSlot entry = slot_at(which);
coleenp@3656 525 if (entry.is_resolved()) {
duke@0 526 // Already resolved - return entry's name.
coleenp@3656 527 assert(entry.get_klass()->is_klass(), "must be");
coleenp@3656 528 return entry.get_klass()->name();
duke@0 529 } else {
coleenp@3656 530 assert(entry.is_unresolved(), "must be either symbol or klass");
coleenp@2069 531 return entry.get_symbol();
duke@0 532 }
duke@0 533 }
duke@0 534
coleenp@3656 535 Symbol* ConstantPool::klass_ref_at_noresolve(int which) {
duke@0 536 jint ref_index = klass_ref_index_at(which);
duke@0 537 return klass_at_noresolve(ref_index);
duke@0 538 }
duke@0 539
coleenp@3656 540 Symbol* ConstantPool::uncached_klass_ref_at_noresolve(int which) {
jrose@1524 541 jint ref_index = uncached_klass_ref_index_at(which);
jrose@1524 542 return klass_at_noresolve(ref_index);
jrose@1524 543 }
jrose@1524 544
coleenp@3656 545 char* ConstantPool::string_at_noresolve(int which) {
coleenp@3656 546 Symbol* s = unresolved_string_at(which);
coleenp@3656 547 if (s == NULL) {
coleenp@3656 548 return (char*)"<pseudo-string>";
duke@0 549 } else {
coleenp@3656 550 return unresolved_string_at(which)->as_C_string();
duke@0 551 }
duke@0 552 }
duke@0 553
coleenp@3656 554 BasicType ConstantPool::basic_type_for_signature_at(int which) {
duke@0 555 return FieldType::basic_type(symbol_at(which));
duke@0 556 }
duke@0 557
duke@0 558
coleenp@3656 559 void ConstantPool::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) {
duke@0 560 for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused
coleenp@3656 561 if (this_oop->tag_at(index).is_string()) {
duke@0 562 this_oop->string_at(index, CHECK);
duke@0 563 }
duke@0 564 }
duke@0 565 }
duke@0 566
coleenp@3656 567 // Resolve all the classes in the constant pool. If they are all resolved,
coleenp@3656 568 // the constant pool is read-only. Enhancement: allocate cp entries to
coleenp@3656 569 // another metaspace, and copy to read-only or read-write space if this
coleenp@3656 570 // bit is set.
coleenp@3656 571 bool ConstantPool::resolve_class_constants(TRAPS) {
coleenp@3656 572 constantPoolHandle cp(THREAD, this);
coleenp@3656 573 for (int index = 1; index < length(); index++) { // Index 0 is unused
coleenp@3656 574 if (tag_at(index).is_unresolved_klass() &&
coleenp@3656 575 klass_at_if_loaded(cp, index) == NULL) {
coleenp@3656 576 return false;
jrose@1838 577 }
coleenp@3656 578 }
coleenp@3656 579 // set_preresolution(); or some bit for future use
coleenp@3656 580 return true;
jrose@1838 581 }
jrose@1838 582
coleenp@3656 583 // If resolution for MethodHandle or MethodType fails, save the exception
coleenp@3656 584 // in the resolution error table, so that the same exception is thrown again.
coleenp@3656 585 void ConstantPool::save_and_throw_exception(constantPoolHandle this_oop, int which,
coleenp@3656 586 int tag, TRAPS) {
coleenp@3656 587 ResourceMark rm;
coleenp@3656 588 Symbol* error = PENDING_EXCEPTION->klass()->name();
iklam@5658 589 MonitorLockerEx ml(this_oop->lock()); // lock cpool to change tag.
coleenp@3656 590
coleenp@3656 591 int error_tag = (tag == JVM_CONSTANT_MethodHandle) ?
coleenp@3656 592 JVM_CONSTANT_MethodHandleInError : JVM_CONSTANT_MethodTypeInError;
coleenp@3656 593
coleenp@3656 594 if (!PENDING_EXCEPTION->
coleenp@3656 595 is_a(SystemDictionary::LinkageError_klass())) {
coleenp@3656 596 // Just throw the exception and don't prevent these classes from
coleenp@3656 597 // being loaded due to virtual machine errors like StackOverflow
coleenp@3656 598 // and OutOfMemoryError, etc, or if the thread was hit by stop()
coleenp@3656 599 // Needs clarification to section 5.4.3 of the VM spec (see 6308271)
coleenp@3656 600
coleenp@3656 601 } else if (this_oop->tag_at(which).value() != error_tag) {
coleenp@3656 602 SystemDictionary::add_resolution_error(this_oop, which, error);
coleenp@3656 603 this_oop->tag_at_put(which, error_tag);
coleenp@3656 604 } else {
coleenp@3656 605 // some other thread has put the class in error state.
coleenp@3656 606 error = SystemDictionary::find_resolution_error(this_oop, which);
coleenp@3656 607 assert(error != NULL, "checking");
coleenp@3656 608 CLEAR_PENDING_EXCEPTION;
coleenp@3656 609 THROW_MSG(error, "");
coleenp@3656 610 }
coleenp@3656 611 }
coleenp@3656 612
coleenp@3656 613
coleenp@3656 614 // Called to resolve constants in the constant pool and return an oop.
coleenp@3656 615 // Some constant pool entries cache their resolved oop. This is also
coleenp@3656 616 // called to create oops from constants to use in arguments for invokedynamic
coleenp@3656 617 oop ConstantPool::resolve_constant_at_impl(constantPoolHandle this_oop, int index, int cache_index, TRAPS) {
jrose@1524 618 oop result_oop = NULL;
jrose@1838 619 Handle throw_exception;
jrose@1838 620
jrose@1838 621 if (cache_index == _possible_index_sentinel) {
coleenp@3656 622 // It is possible that this constant is one which is cached in the objects.
jrose@1838 623 // We'll do a linear search. This should be OK because this usage is rare.
jrose@1838 624 assert(index > 0, "valid index");
coleenp@3656 625 cache_index = this_oop->cp_to_object_index(index);
jrose@1838 626 }
jrose@1838 627 assert(cache_index == _no_index_sentinel || cache_index >= 0, "");
jrose@1838 628 assert(index == _no_index_sentinel || index >= 0, "");
jrose@1838 629
jrose@1524 630 if (cache_index >= 0) {
coleenp@3656 631 result_oop = this_oop->resolved_references()->obj_at(cache_index);
jrose@1524 632 if (result_oop != NULL) {
coleenp@3656 633 return result_oop;
jrose@1838 634 // That was easy...
jrose@1524 635 }
coleenp@3656 636 index = this_oop->object_to_cp_index(cache_index);
jrose@1524 637 }
jrose@1524 638
jrose@1838 639 jvalue prim_value; // temp used only in a few cases below
jrose@1838 640
jrose@1524 641 int tag_value = this_oop->tag_at(index).value();
coleenp@3656 642
jrose@1524 643 switch (tag_value) {
jrose@1524 644
jrose@1524 645 case JVM_CONSTANT_UnresolvedClass:
jrose@1524 646 case JVM_CONSTANT_UnresolvedClassInError:
jrose@1524 647 case JVM_CONSTANT_Class:
jrose@1524 648 {
coleenp@3656 649 assert(cache_index == _no_index_sentinel, "should not have been set");
coleenp@3656 650 Klass* resolved = klass_at_impl(this_oop, index, CHECK_NULL);
jrose@1524 651 // ldc wants the java mirror.
never@2231 652 result_oop = resolved->java_mirror();
jrose@1524 653 break;
jrose@1524 654 }
jrose@1524 655
jrose@1524 656 case JVM_CONSTANT_String:
coleenp@3656 657 assert(cache_index != _no_index_sentinel, "should have been set");
jrose@1524 658 if (this_oop->is_pseudo_string_at(index)) {
coleenp@3656 659 result_oop = this_oop->pseudo_string_at(index, cache_index);
jrose@1524 660 break;
jrose@1524 661 }
coleenp@3656 662 result_oop = string_at_impl(this_oop, index, cache_index, CHECK_NULL);
jrose@1524 663 break;
jrose@1524 664
coleenp@3656 665 case JVM_CONSTANT_MethodHandleInError:
coleenp@3656 666 case JVM_CONSTANT_MethodTypeInError:
coleenp@3656 667 {
coleenp@3656 668 Symbol* error = SystemDictionary::find_resolution_error(this_oop, index);
coleenp@3656 669 guarantee(error != (Symbol*)NULL, "tag mismatch with resolution error table");
coleenp@3656 670 ResourceMark rm;
coleenp@3656 671 THROW_MSG_0(error, "");
coleenp@3656 672 break;
coleenp@3656 673 }
coleenp@3656 674
jrose@1524 675 case JVM_CONSTANT_MethodHandle:
jrose@1524 676 {
jrose@1524 677 int ref_kind = this_oop->method_handle_ref_kind_at(index);
jrose@1524 678 int callee_index = this_oop->method_handle_klass_index_at(index);
coleenp@2069 679 Symbol* name = this_oop->method_handle_name_ref_at(index);
coleenp@2069 680 Symbol* signature = this_oop->method_handle_signature_ref_at(index);
jrose@1524 681 if (PrintMiscellaneous)
jrose@1524 682 tty->print_cr("resolve JVM_CONSTANT_MethodHandle:%d [%d/%d/%d] %s.%s",
jrose@1524 683 ref_kind, index, this_oop->method_handle_index_at(index),
jrose@1524 684 callee_index, name->as_C_string(), signature->as_C_string());
jrose@1524 685 KlassHandle callee;
coleenp@3656 686 { Klass* k = klass_at_impl(this_oop, callee_index, CHECK_NULL);
jrose@1524 687 callee = KlassHandle(THREAD, k);
jrose@1524 688 }
jrose@1524 689 KlassHandle klass(THREAD, this_oop->pool_holder());
jrose@1524 690 Handle value = SystemDictionary::link_method_handle_constant(klass, ref_kind,
jrose@1524 691 callee, name, signature,
jrose@1838 692 THREAD);
coleenp@3656 693 result_oop = value();
jrose@1838 694 if (HAS_PENDING_EXCEPTION) {
coleenp@3656 695 save_and_throw_exception(this_oop, index, tag_value, CHECK_NULL);
jrose@1838 696 }
jrose@1524 697 break;
jrose@1524 698 }
jrose@1524 699
jrose@1524 700 case JVM_CONSTANT_MethodType:
jrose@1524 701 {
coleenp@2069 702 Symbol* signature = this_oop->method_type_signature_at(index);
jrose@1524 703 if (PrintMiscellaneous)
jrose@1524 704 tty->print_cr("resolve JVM_CONSTANT_MethodType [%d/%d] %s",
jrose@1524 705 index, this_oop->method_type_index_at(index),
jrose@1524 706 signature->as_C_string());
jrose@1524 707 KlassHandle klass(THREAD, this_oop->pool_holder());
twisti@3582 708 Handle value = SystemDictionary::find_method_handle_type(signature, klass, THREAD);
coleenp@3656 709 result_oop = value();
jrose@1838 710 if (HAS_PENDING_EXCEPTION) {
coleenp@3656 711 save_and_throw_exception(this_oop, index, tag_value, CHECK_NULL);
jrose@1838 712 }
jrose@1524 713 break;
jrose@1524 714 }
jrose@1524 715
jrose@1524 716 case JVM_CONSTANT_Integer:
coleenp@3656 717 assert(cache_index == _no_index_sentinel, "should not have been set");
jrose@1838 718 prim_value.i = this_oop->int_at(index);
jrose@1838 719 result_oop = java_lang_boxing_object::create(T_INT, &prim_value, CHECK_NULL);
jrose@1838 720 break;
jrose@1838 721
jrose@1524 722 case JVM_CONSTANT_Float:
coleenp@3656 723 assert(cache_index == _no_index_sentinel, "should not have been set");
jrose@1838 724 prim_value.f = this_oop->float_at(index);
jrose@1838 725 result_oop = java_lang_boxing_object::create(T_FLOAT, &prim_value, CHECK_NULL);
jrose@1838 726 break;
jrose@1838 727
jrose@1524 728 case JVM_CONSTANT_Long:
coleenp@3656 729 assert(cache_index == _no_index_sentinel, "should not have been set");
jrose@1838 730 prim_value.j = this_oop->long_at(index);
jrose@1838 731 result_oop = java_lang_boxing_object::create(T_LONG, &prim_value, CHECK_NULL);
jrose@1838 732 break;
jrose@1838 733
jrose@1524 734 case JVM_CONSTANT_Double:
coleenp@3656 735 assert(cache_index == _no_index_sentinel, "should not have been set");
jrose@1838 736 prim_value.d = this_oop->double_at(index);
jrose@1838 737 result_oop = java_lang_boxing_object::create(T_DOUBLE, &prim_value, CHECK_NULL);
jrose@1524 738 break;
jrose@1524 739
jrose@1524 740 default:
jrose@1524 741 DEBUG_ONLY( tty->print_cr("*** %p: tag at CP[%d/%d] = %d",
jrose@1524 742 this_oop(), index, cache_index, tag_value) );
jrose@1524 743 assert(false, "unexpected constant tag");
jrose@1524 744 break;
jrose@1524 745 }
jrose@1524 746
jrose@1524 747 if (cache_index >= 0) {
jrose@1524 748 // Cache the oop here also.
jrose@1838 749 Handle result_handle(THREAD, result_oop);
iklam@5658 750 MonitorLockerEx ml(this_oop->lock()); // don't know if we really need this
coleenp@3656 751 oop result = this_oop->resolved_references()->obj_at(cache_index);
coleenp@3656 752 // Benign race condition: resolved_references may already be filled in while we were trying to lock.
jrose@1838 753 // The important thing here is that all threads pick up the same result.
jrose@1838 754 // It doesn't matter which racing thread wins, as long as only one
jrose@1838 755 // result is used by all threads, and all future queries.
jrose@1838 756 // That result may be either a resolved constant or a failure exception.
coleenp@3656 757 if (result == NULL) {
coleenp@3656 758 this_oop->resolved_references()->obj_at_put(cache_index, result_handle());
coleenp@3656 759 return result_handle();
coleenp@3656 760 } else {
coleenp@3656 761 // Return the winning thread's result. This can be different than
coleenp@3656 762 // result_handle() for MethodHandles.
coleenp@3656 763 return result;
jrose@1524 764 }
jrose@1524 765 } else {
jrose@1524 766 return result_oop;
jrose@1524 767 }
jrose@1524 768 }
jrose@1524 769
coleenp@3656 770 oop ConstantPool::uncached_string_at(int which, TRAPS) {
coleenp@3656 771 Symbol* sym = unresolved_string_at(which);
coleenp@3656 772 oop str = StringTable::intern(sym, CHECK_(NULL));
coleenp@3656 773 assert(java_lang_String::is_instance(str), "must be string");
coleenp@3656 774 return str;
coleenp@3656 775 }
twisti@3582 776
coleenp@3656 777
coleenp@3656 778 oop ConstantPool::resolve_bootstrap_specifier_at_impl(constantPoolHandle this_oop, int index, TRAPS) {
twisti@3582 779 assert(this_oop->tag_at(index).is_invoke_dynamic(), "Corrupted constant pool");
twisti@3582 780
twisti@3582 781 Handle bsm;
twisti@3582 782 int argc;
twisti@3582 783 {
twisti@3582 784 // JVM_CONSTANT_InvokeDynamic is an ordered pair of [bootm, name&type], plus optional arguments
twisti@3582 785 // The bootm, being a JVM_CONSTANT_MethodHandle, has its own cache entry.
twisti@3582 786 // It is accompanied by the optional arguments.
twisti@3582 787 int bsm_index = this_oop->invoke_dynamic_bootstrap_method_ref_index_at(index);
twisti@3582 788 oop bsm_oop = this_oop->resolve_possibly_cached_constant_at(bsm_index, CHECK_NULL);
twisti@3582 789 if (!java_lang_invoke_MethodHandle::is_instance(bsm_oop)) {
twisti@3582 790 THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "BSM not an MethodHandle");
twisti@3582 791 }
twisti@3582 792
twisti@3582 793 // Extract the optional static arguments.
twisti@3582 794 argc = this_oop->invoke_dynamic_argument_count_at(index);
twisti@3582 795 if (argc == 0) return bsm_oop;
twisti@3582 796
twisti@3582 797 bsm = Handle(THREAD, bsm_oop);
twisti@3582 798 }
twisti@3582 799
twisti@3582 800 objArrayHandle info;
twisti@3582 801 {
twisti@3582 802 objArrayOop info_oop = oopFactory::new_objArray(SystemDictionary::Object_klass(), 1+argc, CHECK_NULL);
twisti@3582 803 info = objArrayHandle(THREAD, info_oop);
twisti@3582 804 }
twisti@3582 805
twisti@3582 806 info->obj_at_put(0, bsm());
twisti@3582 807 for (int i = 0; i < argc; i++) {
twisti@3582 808 int arg_index = this_oop->invoke_dynamic_argument_index_at(index, i);
twisti@3582 809 oop arg_oop = this_oop->resolve_possibly_cached_constant_at(arg_index, CHECK_NULL);
twisti@3582 810 info->obj_at_put(1+i, arg_oop);
twisti@3582 811 }
twisti@3582 812
twisti@3582 813 return info();
twisti@3582 814 }
twisti@3582 815
coleenp@3656 816 oop ConstantPool::string_at_impl(constantPoolHandle this_oop, int which, int obj_index, TRAPS) {
coleenp@3656 817 // If the string has already been interned, this entry will be non-null
coleenp@3656 818 oop str = this_oop->resolved_references()->obj_at(obj_index);
coleenp@3656 819 if (str != NULL) return str;
coleenp@5435 820 Symbol* sym = this_oop->unresolved_string_at(which);
coleenp@3656 821 str = StringTable::intern(sym, CHECK_(NULL));
coleenp@3656 822 this_oop->string_at_put(which, obj_index, str);
coleenp@2069 823 assert(java_lang_String::is_instance(str), "must be string");
coleenp@2069 824 return str;
duke@0 825 }
duke@0 826
duke@0 827
coleenp@3656 828 bool ConstantPool::klass_name_at_matches(instanceKlassHandle k,
duke@0 829 int which) {
coleenp@2069 830 // Names are interned, so we can compare Symbol*s directly
coleenp@2069 831 Symbol* cp_name = klass_name_at(which);
duke@0 832 return (cp_name == k->name());
duke@0 833 }
duke@0 834
duke@0 835
coleenp@2069 836 // Iterate over symbols and decrement ones which are Symbol*s.
coleenp@2069 837 // This is done during GC so do not need to lock constantPool unless we
coleenp@2069 838 // have per-thread safepoints.
coleenp@2069 839 // Only decrement the UTF8 symbols. Unresolved classes and strings point to
coleenp@2069 840 // these symbols but didn't increment the reference count.
coleenp@3656 841 void ConstantPool::unreference_symbols() {
coleenp@2069 842 for (int index = 1; index < length(); index++) { // Index 0 is unused
coleenp@2069 843 constantTag tag = tag_at(index);
coleenp@2069 844 if (tag.is_symbol()) {
coleenp@2069 845 symbol_at(index)->decrement_refcount();
coleenp@2069 846 }
coleenp@2069 847 }
coleenp@2069 848 }
duke@0 849
duke@0 850
duke@0 851 // Compare this constant pool's entry at index1 to the constant pool
duke@0 852 // cp2's entry at index2.
coleenp@3656 853 bool ConstantPool::compare_entry_to(int index1, constantPoolHandle cp2,
duke@0 854 int index2, TRAPS) {
duke@0 855
coleenp@5574 856 // The error tags are equivalent to non-error tags when comparing
coleenp@5574 857 jbyte t1 = tag_at(index1).non_error_value();
coleenp@5574 858 jbyte t2 = cp2->tag_at(index2).non_error_value();
duke@0 859
duke@0 860 if (t1 != t2) {
duke@0 861 // Not the same entry type so there is nothing else to check. Note
duke@0 862 // that this style of checking will consider resolved/unresolved
coleenp@3656 863 // class pairs as different.
coleenp@3656 864 // From the ConstantPool* API point of view, this is correct
coleenp@3656 865 // behavior. See VM_RedefineClasses::merge_constant_pools() to see how this
coleenp@3656 866 // plays out in the context of ConstantPool* merging.
duke@0 867 return false;
duke@0 868 }
duke@0 869
duke@0 870 switch (t1) {
duke@0 871 case JVM_CONSTANT_Class:
duke@0 872 {
coleenp@3656 873 Klass* k1 = klass_at(index1, CHECK_false);
coleenp@3656 874 Klass* k2 = cp2->klass_at(index2, CHECK_false);
duke@0 875 if (k1 == k2) {
duke@0 876 return true;
duke@0 877 }
duke@0 878 } break;
duke@0 879
duke@0 880 case JVM_CONSTANT_ClassIndex:
duke@0 881 {
duke@0 882 int recur1 = klass_index_at(index1);
duke@0 883 int recur2 = cp2->klass_index_at(index2);
duke@0 884 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 885 if (match) {
duke@0 886 return true;
duke@0 887 }
duke@0 888 } break;
duke@0 889
duke@0 890 case JVM_CONSTANT_Double:
duke@0 891 {
duke@0 892 jdouble d1 = double_at(index1);
duke@0 893 jdouble d2 = cp2->double_at(index2);
duke@0 894 if (d1 == d2) {
duke@0 895 return true;
duke@0 896 }
duke@0 897 } break;
duke@0 898
duke@0 899 case JVM_CONSTANT_Fieldref:
duke@0 900 case JVM_CONSTANT_InterfaceMethodref:
duke@0 901 case JVM_CONSTANT_Methodref:
duke@0 902 {
duke@0 903 int recur1 = uncached_klass_ref_index_at(index1);
duke@0 904 int recur2 = cp2->uncached_klass_ref_index_at(index2);
duke@0 905 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 906 if (match) {
duke@0 907 recur1 = uncached_name_and_type_ref_index_at(index1);
duke@0 908 recur2 = cp2->uncached_name_and_type_ref_index_at(index2);
duke@0 909 match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 910 if (match) {
duke@0 911 return true;
duke@0 912 }
duke@0 913 }
duke@0 914 } break;
duke@0 915
duke@0 916 case JVM_CONSTANT_Float:
duke@0 917 {
duke@0 918 jfloat f1 = float_at(index1);
duke@0 919 jfloat f2 = cp2->float_at(index2);
duke@0 920 if (f1 == f2) {
duke@0 921 return true;
duke@0 922 }
duke@0 923 } break;
duke@0 924
duke@0 925 case JVM_CONSTANT_Integer:
duke@0 926 {
duke@0 927 jint i1 = int_at(index1);
duke@0 928 jint i2 = cp2->int_at(index2);
duke@0 929 if (i1 == i2) {
duke@0 930 return true;
duke@0 931 }
duke@0 932 } break;
duke@0 933
duke@0 934 case JVM_CONSTANT_Long:
duke@0 935 {
duke@0 936 jlong l1 = long_at(index1);
duke@0 937 jlong l2 = cp2->long_at(index2);
duke@0 938 if (l1 == l2) {
duke@0 939 return true;
duke@0 940 }
duke@0 941 } break;
duke@0 942
duke@0 943 case JVM_CONSTANT_NameAndType:
duke@0 944 {
duke@0 945 int recur1 = name_ref_index_at(index1);
duke@0 946 int recur2 = cp2->name_ref_index_at(index2);
duke@0 947 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 948 if (match) {
duke@0 949 recur1 = signature_ref_index_at(index1);
duke@0 950 recur2 = cp2->signature_ref_index_at(index2);
duke@0 951 match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 952 if (match) {
duke@0 953 return true;
duke@0 954 }
duke@0 955 }
duke@0 956 } break;
duke@0 957
duke@0 958 case JVM_CONSTANT_StringIndex:
duke@0 959 {
duke@0 960 int recur1 = string_index_at(index1);
duke@0 961 int recur2 = cp2->string_index_at(index2);
duke@0 962 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 963 if (match) {
duke@0 964 return true;
duke@0 965 }
duke@0 966 } break;
duke@0 967
duke@0 968 case JVM_CONSTANT_UnresolvedClass:
duke@0 969 {
coleenp@2069 970 Symbol* k1 = unresolved_klass_at(index1);
coleenp@2069 971 Symbol* k2 = cp2->unresolved_klass_at(index2);
duke@0 972 if (k1 == k2) {
duke@0 973 return true;
duke@0 974 }
duke@0 975 } break;
duke@0 976
jrose@1524 977 case JVM_CONSTANT_MethodType:
jrose@1524 978 {
coleenp@5569 979 int k1 = method_type_index_at_error_ok(index1);
coleenp@5569 980 int k2 = cp2->method_type_index_at_error_ok(index2);
jrose@1924 981 bool match = compare_entry_to(k1, cp2, k2, CHECK_false);
jrose@1924 982 if (match) {
jrose@1524 983 return true;
jrose@1524 984 }
jrose@1524 985 } break;
jrose@1524 986
jrose@1524 987 case JVM_CONSTANT_MethodHandle:
jrose@1524 988 {
coleenp@5569 989 int k1 = method_handle_ref_kind_at_error_ok(index1);
coleenp@5569 990 int k2 = cp2->method_handle_ref_kind_at_error_ok(index2);
jrose@1524 991 if (k1 == k2) {
coleenp@5569 992 int i1 = method_handle_index_at_error_ok(index1);
coleenp@5569 993 int i2 = cp2->method_handle_index_at_error_ok(index2);
jrose@1924 994 bool match = compare_entry_to(i1, cp2, i2, CHECK_false);
jrose@1924 995 if (match) {
jrose@1524 996 return true;
jrose@1524 997 }
jrose@1524 998 }
jrose@1524 999 } break;
jrose@1524 1000
jrose@1583 1001 case JVM_CONSTANT_InvokeDynamic:
jrose@1583 1002 {
sspitsyn@4644 1003 int k1 = invoke_dynamic_name_and_type_ref_index_at(index1);
sspitsyn@4644 1004 int k2 = cp2->invoke_dynamic_name_and_type_ref_index_at(index2);
sspitsyn@4644 1005 int i1 = invoke_dynamic_bootstrap_specifier_index(index1);
sspitsyn@4644 1006 int i2 = cp2->invoke_dynamic_bootstrap_specifier_index(index2);
ccheung@4848 1007 // separate statements and variables because CHECK_false is used
ccheung@4848 1008 bool match_entry = compare_entry_to(k1, cp2, k2, CHECK_false);
ccheung@4848 1009 bool match_operand = compare_operand_to(i1, cp2, i2, CHECK_false);
ccheung@4848 1010 return (match_entry && match_operand);
jrose@1583 1011 } break;
jrose@1583 1012
coleenp@3656 1013 case JVM_CONSTANT_String:
duke@0 1014 {
coleenp@2069 1015 Symbol* s1 = unresolved_string_at(index1);
coleenp@2069 1016 Symbol* s2 = cp2->unresolved_string_at(index2);
duke@0 1017 if (s1 == s2) {
duke@0 1018 return true;
duke@0 1019 }
duke@0 1020 } break;
duke@0 1021
duke@0 1022 case JVM_CONSTANT_Utf8:
duke@0 1023 {
coleenp@2069 1024 Symbol* s1 = symbol_at(index1);
coleenp@2069 1025 Symbol* s2 = cp2->symbol_at(index2);
duke@0 1026 if (s1 == s2) {
duke@0 1027 return true;
duke@0 1028 }
duke@0 1029 } break;
duke@0 1030
duke@0 1031 // Invalid is used as the tag for the second constant pool entry
duke@0 1032 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should
duke@0 1033 // not be seen by itself.
duke@0 1034 case JVM_CONSTANT_Invalid: // fall through
duke@0 1035
duke@0 1036 default:
duke@0 1037 ShouldNotReachHere();
duke@0 1038 break;
duke@0 1039 }
duke@0 1040
duke@0 1041 return false;
duke@0 1042 } // end compare_entry_to()
duke@0 1043
duke@0 1044
sspitsyn@4644 1045 // Resize the operands array with delta_len and delta_size.
sspitsyn@4644 1046 // Used in RedefineClasses for CP merge.
sspitsyn@4644 1047 void ConstantPool::resize_operands(int delta_len, int delta_size, TRAPS) {
sspitsyn@4644 1048 int old_len = operand_array_length(operands());
sspitsyn@4644 1049 int new_len = old_len + delta_len;
sspitsyn@4644 1050 int min_len = (delta_len > 0) ? old_len : new_len;
sspitsyn@4644 1051
sspitsyn@4644 1052 int old_size = operands()->length();
sspitsyn@4644 1053 int new_size = old_size + delta_size;
sspitsyn@4644 1054 int min_size = (delta_size > 0) ? old_size : new_size;
sspitsyn@4644 1055
sspitsyn@4644 1056 ClassLoaderData* loader_data = pool_holder()->class_loader_data();
sspitsyn@4644 1057 Array<u2>* new_ops = MetadataFactory::new_array<u2>(loader_data, new_size, CHECK);
sspitsyn@4644 1058
sspitsyn@4644 1059 // Set index in the resized array for existing elements only
sspitsyn@4644 1060 for (int idx = 0; idx < min_len; idx++) {
sspitsyn@4644 1061 int offset = operand_offset_at(idx); // offset in original array
sspitsyn@4644 1062 operand_offset_at_put(new_ops, idx, offset + 2*delta_len); // offset in resized array
sspitsyn@4644 1063 }
sspitsyn@4644 1064 // Copy the bootstrap specifiers only
sspitsyn@4644 1065 Copy::conjoint_memory_atomic(operands()->adr_at(2*old_len),
sspitsyn@4644 1066 new_ops->adr_at(2*new_len),
sspitsyn@4644 1067 (min_size - 2*min_len) * sizeof(u2));
sspitsyn@4644 1068 // Explicitly deallocate old operands array.
sspitsyn@4644 1069 // Note, it is not needed for 7u backport.
sspitsyn@4644 1070 if ( operands() != NULL) { // the safety check
sspitsyn@4644 1071 MetadataFactory::free_array<u2>(loader_data, operands());
sspitsyn@4644 1072 }
sspitsyn@4644 1073 set_operands(new_ops);
sspitsyn@4644 1074 } // end resize_operands()
sspitsyn@4644 1075
sspitsyn@4644 1076
sspitsyn@4644 1077 // Extend the operands array with the length and size of the ext_cp operands.
sspitsyn@4644 1078 // Used in RedefineClasses for CP merge.
sspitsyn@4644 1079 void ConstantPool::extend_operands(constantPoolHandle ext_cp, TRAPS) {
sspitsyn@4644 1080 int delta_len = operand_array_length(ext_cp->operands());
sspitsyn@4644 1081 if (delta_len == 0) {
sspitsyn@4644 1082 return; // nothing to do
sspitsyn@4644 1083 }
sspitsyn@4644 1084 int delta_size = ext_cp->operands()->length();
sspitsyn@4644 1085
sspitsyn@4644 1086 assert(delta_len > 0 && delta_size > 0, "extended operands array must be bigger");
sspitsyn@4644 1087
sspitsyn@4644 1088 if (operand_array_length(operands()) == 0) {
sspitsyn@4644 1089 ClassLoaderData* loader_data = pool_holder()->class_loader_data();
sspitsyn@4644 1090 Array<u2>* new_ops = MetadataFactory::new_array<u2>(loader_data, delta_size, CHECK);
sspitsyn@4644 1091 // The first element index defines the offset of second part
sspitsyn@4644 1092 operand_offset_at_put(new_ops, 0, 2*delta_len); // offset in new array
sspitsyn@4644 1093 set_operands(new_ops);
sspitsyn@4644 1094 } else {
sspitsyn@4644 1095 resize_operands(delta_len, delta_size, CHECK);
sspitsyn@4644 1096 }
sspitsyn@4644 1097
sspitsyn@4644 1098 } // end extend_operands()
sspitsyn@4644 1099
sspitsyn@4644 1100
sspitsyn@4644 1101 // Shrink the operands array to a smaller array with new_len length.
sspitsyn@4644 1102 // Used in RedefineClasses for CP merge.
sspitsyn@4644 1103 void ConstantPool::shrink_operands(int new_len, TRAPS) {
sspitsyn@4644 1104 int old_len = operand_array_length(operands());
sspitsyn@4644 1105 if (new_len == old_len) {
sspitsyn@4644 1106 return; // nothing to do
sspitsyn@4644 1107 }
sspitsyn@4644 1108 assert(new_len < old_len, "shrunken operands array must be smaller");
sspitsyn@4644 1109
sspitsyn@4644 1110 int free_base = operand_next_offset_at(new_len - 1);
sspitsyn@4644 1111 int delta_len = new_len - old_len;
sspitsyn@4644 1112 int delta_size = 2*delta_len + free_base - operands()->length();
sspitsyn@4644 1113
sspitsyn@4644 1114 resize_operands(delta_len, delta_size, CHECK);
sspitsyn@4644 1115
sspitsyn@4644 1116 } // end shrink_operands()
sspitsyn@4644 1117
sspitsyn@4644 1118
sspitsyn@4135 1119 void ConstantPool::copy_operands(constantPoolHandle from_cp,
sspitsyn@4135 1120 constantPoolHandle to_cp,
sspitsyn@4135 1121 TRAPS) {
jrose@1924 1122
jrose@1924 1123 int from_oplen = operand_array_length(from_cp->operands());
jrose@1924 1124 int old_oplen = operand_array_length(to_cp->operands());
jrose@1924 1125 if (from_oplen != 0) {
kamg@3874 1126 ClassLoaderData* loader_data = to_cp->pool_holder()->class_loader_data();
jrose@1924 1127 // append my operands to the target's operands array
jrose@1924 1128 if (old_oplen == 0) {
kamg@3874 1129 // Can't just reuse from_cp's operand list because of deallocation issues
kamg@3874 1130 int len = from_cp->operands()->length();
kamg@3874 1131 Array<u2>* new_ops = MetadataFactory::new_array<u2>(loader_data, len, CHECK);
kamg@3874 1132 Copy::conjoint_memory_atomic(
kamg@3874 1133 from_cp->operands()->adr_at(0), new_ops->adr_at(0), len * sizeof(u2));
kamg@3874 1134 to_cp->set_operands(new_ops);
jrose@1924 1135 } else {
jrose@1924 1136 int old_len = to_cp->operands()->length();
jrose@1924 1137 int from_len = from_cp->operands()->length();
jrose@1924 1138 int old_off = old_oplen * sizeof(u2);
jrose@1924 1139 int from_off = from_oplen * sizeof(u2);
coleenp@3656 1140 // Use the metaspace for the destination constant pool
coleenp@3656 1141 Array<u2>* new_operands = MetadataFactory::new_array<u2>(loader_data, old_len + from_len, CHECK);
jrose@1924 1142 int fillp = 0, len = 0;
jrose@1924 1143 // first part of dest
coleenp@3656 1144 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(0),
coleenp@3656 1145 new_operands->adr_at(fillp),
jrose@1924 1146 (len = old_off) * sizeof(u2));
jrose@1924 1147 fillp += len;
jrose@1924 1148 // first part of src
sspitsyn@4147 1149 Copy::conjoint_memory_atomic(from_cp->operands()->adr_at(0),
coleenp@3656 1150 new_operands->adr_at(fillp),
jrose@1924 1151 (len = from_off) * sizeof(u2));
jrose@1924 1152 fillp += len;
jrose@1924 1153 // second part of dest
coleenp@3656 1154 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(old_off),
coleenp@3656 1155 new_operands->adr_at(fillp),
jrose@1924 1156 (len = old_len - old_off) * sizeof(u2));
jrose@1924 1157 fillp += len;
jrose@1924 1158 // second part of src
sspitsyn@4147 1159 Copy::conjoint_memory_atomic(from_cp->operands()->adr_at(from_off),
coleenp@3656 1160 new_operands->adr_at(fillp),
jrose@1924 1161 (len = from_len - from_off) * sizeof(u2));
jrose@1924 1162 fillp += len;
jrose@1924 1163 assert(fillp == new_operands->length(), "");
jrose@1924 1164
jrose@1924 1165 // Adjust indexes in the first part of the copied operands array.
jrose@1924 1166 for (int j = 0; j < from_oplen; j++) {
coleenp@3656 1167 int offset = operand_offset_at(new_operands, old_oplen + j);
jrose@1924 1168 assert(offset == operand_offset_at(from_cp->operands(), j), "correct copy");
jrose@1924 1169 offset += old_len; // every new tuple is preceded by old_len extra u2's
coleenp@3656 1170 operand_offset_at_put(new_operands, old_oplen + j, offset);
jrose@1924 1171 }
jrose@1924 1172
jrose@1924 1173 // replace target operands array with combined array
coleenp@3656 1174 to_cp->set_operands(new_operands);
jrose@1924 1175 }
jrose@1924 1176 }
sspitsyn@4135 1177 } // end copy_operands()
jrose@1924 1178
sspitsyn@4135 1179
sspitsyn@4135 1180 // Copy this constant pool's entries at start_i to end_i (inclusive)
sspitsyn@4135 1181 // to the constant pool to_cp's entries starting at to_i. A total of
sspitsyn@4135 1182 // (end_i - start_i) + 1 entries are copied.
sspitsyn@4135 1183 void ConstantPool::copy_cp_to_impl(constantPoolHandle from_cp, int start_i, int end_i,
sspitsyn@4135 1184 constantPoolHandle to_cp, int to_i, TRAPS) {
sspitsyn@4135 1185
sspitsyn@4135 1186
sspitsyn@4135 1187 int dest_i = to_i; // leave original alone for debug purposes
sspitsyn@4135 1188
sspitsyn@4135 1189 for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) {
sspitsyn@4135 1190 copy_entry_to(from_cp, src_i, to_cp, dest_i, CHECK);
sspitsyn@4135 1191
sspitsyn@4135 1192 switch (from_cp->tag_at(src_i).value()) {
sspitsyn@4135 1193 case JVM_CONSTANT_Double:
sspitsyn@4135 1194 case JVM_CONSTANT_Long:
sspitsyn@4135 1195 // double and long take two constant pool entries
sspitsyn@4135 1196 src_i += 2;
sspitsyn@4135 1197 dest_i += 2;
sspitsyn@4135 1198 break;
sspitsyn@4135 1199
sspitsyn@4135 1200 default:
sspitsyn@4135 1201 // all others take one constant pool entry
sspitsyn@4135 1202 src_i++;
sspitsyn@4135 1203 dest_i++;
sspitsyn@4135 1204 break;
sspitsyn@4135 1205 }
sspitsyn@4135 1206 }
sspitsyn@4135 1207 copy_operands(from_cp, to_cp, CHECK);
sspitsyn@4135 1208
sspitsyn@4135 1209 } // end copy_cp_to_impl()
duke@0 1210
duke@0 1211
duke@0 1212 // Copy this constant pool's entry at from_i to the constant pool
duke@0 1213 // to_cp's entry at to_i.
coleenp@3656 1214 void ConstantPool::copy_entry_to(constantPoolHandle from_cp, int from_i,
jrose@1924 1215 constantPoolHandle to_cp, int to_i,
jrose@1924 1216 TRAPS) {
duke@0 1217
jrose@1924 1218 int tag = from_cp->tag_at(from_i).value();
jrose@1924 1219 switch (tag) {
duke@0 1220 case JVM_CONSTANT_Class:
duke@0 1221 {
coleenp@3656 1222 Klass* k = from_cp->klass_at(from_i, CHECK);
duke@0 1223 to_cp->klass_at_put(to_i, k);
duke@0 1224 } break;
duke@0 1225
duke@0 1226 case JVM_CONSTANT_ClassIndex:
duke@0 1227 {
jrose@1924 1228 jint ki = from_cp->klass_index_at(from_i);
duke@0 1229 to_cp->klass_index_at_put(to_i, ki);
duke@0 1230 } break;
duke@0 1231
duke@0 1232 case JVM_CONSTANT_Double:
duke@0 1233 {
jrose@1924 1234 jdouble d = from_cp->double_at(from_i);
duke@0 1235 to_cp->double_at_put(to_i, d);
duke@0 1236 // double takes two constant pool entries so init second entry's tag
duke@0 1237 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid);
duke@0 1238 } break;
duke@0 1239
duke@0 1240 case JVM_CONSTANT_Fieldref:
duke@0 1241 {
jrose@1924 1242 int class_index = from_cp->uncached_klass_ref_index_at(from_i);
jrose@1924 1243 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i);
duke@0 1244 to_cp->field_at_put(to_i, class_index, name_and_type_index);
duke@0 1245 } break;
duke@0 1246
duke@0 1247 case JVM_CONSTANT_Float:
duke@0 1248 {
jrose@1924 1249 jfloat f = from_cp->float_at(from_i);
duke@0 1250 to_cp->float_at_put(to_i, f);
duke@0 1251 } break;
duke@0 1252
duke@0 1253 case JVM_CONSTANT_Integer:
duke@0 1254 {
jrose@1924 1255 jint i = from_cp->int_at(from_i);
duke@0 1256 to_cp->int_at_put(to_i, i);
duke@0 1257 } break;
duke@0 1258
duke@0 1259 case JVM_CONSTANT_InterfaceMethodref:
duke@0 1260 {
jrose@1924 1261 int class_index = from_cp->uncached_klass_ref_index_at(from_i);
jrose@1924 1262 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i);
duke@0 1263 to_cp->interface_method_at_put(to_i, class_index, name_and_type_index);
duke@0 1264 } break;
duke@0 1265
duke@0 1266 case JVM_CONSTANT_Long:
duke@0 1267 {
jrose@1924 1268 jlong l = from_cp->long_at(from_i);
duke@0 1269 to_cp->long_at_put(to_i, l);
duke@0 1270 // long takes two constant pool entries so init second entry's tag
duke@0 1271 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid);
duke@0 1272 } break;
duke@0 1273
duke@0 1274 case JVM_CONSTANT_Methodref:
duke@0 1275 {
jrose@1924 1276 int class_index = from_cp->uncached_klass_ref_index_at(from_i);
jrose@1924 1277 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i);
duke@0 1278 to_cp->method_at_put(to_i, class_index, name_and_type_index);
duke@0 1279 } break;
duke@0 1280
duke@0 1281 case JVM_CONSTANT_NameAndType:
duke@0 1282 {
jrose@1924 1283 int name_ref_index = from_cp->name_ref_index_at(from_i);
jrose@1924 1284 int signature_ref_index = from_cp->signature_ref_index_at(from_i);
duke@0 1285 to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index);
duke@0 1286 } break;
duke@0 1287
duke@0 1288 case JVM_CONSTANT_StringIndex:
duke@0 1289 {
jrose@1924 1290 jint si = from_cp->string_index_at(from_i);
duke@0 1291 to_cp->string_index_at_put(to_i, si);
duke@0 1292 } break;
duke@0 1293
duke@0 1294 case JVM_CONSTANT_UnresolvedClass:
duke@0 1295 {
coleenp@2187 1296 // Can be resolved after checking tag, so check the slot first.
coleenp@2187 1297 CPSlot entry = from_cp->slot_at(from_i);
coleenp@3656 1298 if (entry.is_resolved()) {
coleenp@3656 1299 assert(entry.get_klass()->is_klass(), "must be");
coleenp@2187 1300 // Already resolved
coleenp@3656 1301 to_cp->klass_at_put(to_i, entry.get_klass());
coleenp@2187 1302 } else {
coleenp@2187 1303 to_cp->unresolved_klass_at_put(to_i, entry.get_symbol());
coleenp@2187 1304 }
duke@0 1305 } break;
duke@0 1306
coleenp@3656 1307 case JVM_CONSTANT_String:
duke@0 1308 {
coleenp@3656 1309 Symbol* s = from_cp->unresolved_string_at(from_i);
coleenp@3656 1310 to_cp->unresolved_string_at_put(to_i, s);
duke@0 1311 } break;
duke@0 1312
duke@0 1313 case JVM_CONSTANT_Utf8:
duke@0 1314 {
coleenp@2069 1315 Symbol* s = from_cp->symbol_at(from_i);
coleenp@3656 1316 // Need to increase refcount, the old one will be thrown away and deferenced
coleenp@3656 1317 s->increment_refcount();
duke@0 1318 to_cp->symbol_at_put(to_i, s);
duke@0 1319 } break;
duke@0 1320
jrose@1524 1321 case JVM_CONSTANT_MethodType:
coleenp@5569 1322 case JVM_CONSTANT_MethodTypeInError:
jrose@1524 1323 {
coleenp@5569 1324 jint k = from_cp->method_type_index_at_error_ok(from_i);
jrose@1524 1325 to_cp->method_type_index_at_put(to_i, k);
jrose@1524 1326 } break;
jrose@1524 1327
jrose@1524 1328 case JVM_CONSTANT_MethodHandle:
coleenp@5569 1329 case JVM_CONSTANT_MethodHandleInError:
jrose@1524 1330 {
coleenp@5569 1331 int k1 = from_cp->method_handle_ref_kind_at_error_ok(from_i);
coleenp@5569 1332 int k2 = from_cp->method_handle_index_at_error_ok(from_i);
jrose@1524 1333 to_cp->method_handle_index_at_put(to_i, k1, k2);
jrose@1524 1334 } break;
jrose@1524 1335
jrose@1583 1336 case JVM_CONSTANT_InvokeDynamic:
jrose@1583 1337 {
jrose@1924 1338 int k1 = from_cp->invoke_dynamic_bootstrap_specifier_index(from_i);
jrose@1924 1339 int k2 = from_cp->invoke_dynamic_name_and_type_ref_index_at(from_i);
jrose@1924 1340 k1 += operand_array_length(to_cp->operands()); // to_cp might already have operands
jrose@1924 1341 to_cp->invoke_dynamic_at_put(to_i, k1, k2);
jrose@1583 1342 } break;
jrose@1583 1343
duke@0 1344 // Invalid is used as the tag for the second constant pool entry
duke@0 1345 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should
duke@0 1346 // not be seen by itself.
duke@0 1347 case JVM_CONSTANT_Invalid: // fall through
duke@0 1348
duke@0 1349 default:
duke@0 1350 {
duke@0 1351 ShouldNotReachHere();
duke@0 1352 } break;
duke@0 1353 }
duke@0 1354 } // end copy_entry_to()
duke@0 1355
duke@0 1356
duke@0 1357 // Search constant pool search_cp for an entry that matches this
duke@0 1358 // constant pool's entry at pattern_i. Returns the index of a
duke@0 1359 // matching entry or zero (0) if there is no matching entry.
coleenp@3656 1360 int ConstantPool::find_matching_entry(int pattern_i,
duke@0 1361 constantPoolHandle search_cp, TRAPS) {
duke@0 1362
duke@0 1363 // index zero (0) is not used
duke@0 1364 for (int i = 1; i < search_cp->length(); i++) {
duke@0 1365 bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0);
duke@0 1366 if (found) {
duke@0 1367 return i;
duke@0 1368 }
duke@0 1369 }
duke@0 1370
duke@0 1371 return 0; // entry not found; return unused index zero (0)
duke@0 1372 } // end find_matching_entry()
duke@0 1373
duke@0 1374
sspitsyn@4644 1375 // Compare this constant pool's bootstrap specifier at idx1 to the constant pool
sspitsyn@4644 1376 // cp2's bootstrap specifier at idx2.
sspitsyn@4644 1377 bool ConstantPool::compare_operand_to(int idx1, constantPoolHandle cp2, int idx2, TRAPS) {
sspitsyn@4644 1378 int k1 = operand_bootstrap_method_ref_index_at(idx1);
sspitsyn@4644 1379 int k2 = cp2->operand_bootstrap_method_ref_index_at(idx2);
sspitsyn@4644 1380 bool match = compare_entry_to(k1, cp2, k2, CHECK_false);
sspitsyn@4644 1381
sspitsyn@4644 1382 if (!match) {
sspitsyn@4644 1383 return false;
sspitsyn@4644 1384 }
sspitsyn@4644 1385 int argc = operand_argument_count_at(idx1);
sspitsyn@4644 1386 if (argc == cp2->operand_argument_count_at(idx2)) {
sspitsyn@4644 1387 for (int j = 0; j < argc; j++) {
sspitsyn@4644 1388 k1 = operand_argument_index_at(idx1, j);
sspitsyn@4644 1389 k2 = cp2->operand_argument_index_at(idx2, j);
sspitsyn@4644 1390 match = compare_entry_to(k1, cp2, k2, CHECK_false);
sspitsyn@4644 1391 if (!match) {
sspitsyn@4644 1392 return false;
sspitsyn@4644 1393 }
sspitsyn@4644 1394 }
sspitsyn@4644 1395 return true; // got through loop; all elements equal
sspitsyn@4644 1396 }
sspitsyn@4644 1397 return false;
sspitsyn@4644 1398 } // end compare_operand_to()
sspitsyn@4644 1399
sspitsyn@4644 1400 // Search constant pool search_cp for a bootstrap specifier that matches
sspitsyn@4644 1401 // this constant pool's bootstrap specifier at pattern_i index.
sspitsyn@4644 1402 // Return the index of a matching bootstrap specifier or (-1) if there is no match.
sspitsyn@4644 1403 int ConstantPool::find_matching_operand(int pattern_i,
sspitsyn@4644 1404 constantPoolHandle search_cp, int search_len, TRAPS) {
sspitsyn@4644 1405 for (int i = 0; i < search_len; i++) {
sspitsyn@4644 1406 bool found = compare_operand_to(pattern_i, search_cp, i, CHECK_(-1));
sspitsyn@4644 1407 if (found) {
sspitsyn@4644 1408 return i;
sspitsyn@4644 1409 }
sspitsyn@4644 1410 }
sspitsyn@4644 1411 return -1; // bootstrap specifier not found; return unused index (-1)
sspitsyn@4644 1412 } // end find_matching_operand()
sspitsyn@4644 1413
sspitsyn@4644 1414
duke@0 1415 #ifndef PRODUCT
duke@0 1416
coleenp@3656 1417 const char* ConstantPool::printable_name_at(int which) {
duke@0 1418
duke@0 1419 constantTag tag = tag_at(which);
duke@0 1420
coleenp@3656 1421 if (tag.is_string()) {
duke@0 1422 return string_at_noresolve(which);
duke@0 1423 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
duke@0 1424 return klass_name_at(which)->as_C_string();
duke@0 1425 } else if (tag.is_symbol()) {
duke@0 1426 return symbol_at(which)->as_C_string();
duke@0 1427 }
duke@0 1428 return "";
duke@0 1429 }
duke@0 1430
duke@0 1431 #endif // PRODUCT
duke@0 1432
duke@0 1433
duke@0 1434 // JVMTI GetConstantPool support
duke@0 1435
mikael@4540 1436 // For debugging of constant pool
mikael@4540 1437 const bool debug_cpool = false;
duke@0 1438
mikael@4540 1439 #define DBG(code) do { if (debug_cpool) { (code); } } while(0)
duke@0 1440
duke@0 1441 static void print_cpool_bytes(jint cnt, u1 *bytes) {
mikael@4540 1442 const char* WARN_MSG = "Must not be such entry!";
duke@0 1443 jint size = 0;
duke@0 1444 u2 idx1, idx2;
duke@0 1445
duke@0 1446 for (jint idx = 1; idx < cnt; idx++) {
duke@0 1447 jint ent_size = 0;
duke@0 1448 u1 tag = *bytes++;
duke@0 1449 size++; // count tag
duke@0 1450
duke@0 1451 printf("const #%03d, tag: %02d ", idx, tag);
duke@0 1452 switch(tag) {
duke@0 1453 case JVM_CONSTANT_Invalid: {
duke@0 1454 printf("Invalid");
duke@0 1455 break;
duke@0 1456 }
duke@0 1457 case JVM_CONSTANT_Unicode: {
duke@0 1458 printf("Unicode %s", WARN_MSG);
duke@0 1459 break;
duke@0 1460 }
duke@0 1461 case JVM_CONSTANT_Utf8: {
duke@0 1462 u2 len = Bytes::get_Java_u2(bytes);
duke@0 1463 char str[128];
duke@0 1464 if (len > 127) {
duke@0 1465 len = 127;
duke@0 1466 }
duke@0 1467 strncpy(str, (char *) (bytes+2), len);
duke@0 1468 str[len] = '\0';
duke@0 1469 printf("Utf8 \"%s\"", str);
duke@0 1470 ent_size = 2 + len;
duke@0 1471 break;
duke@0 1472 }
duke@0 1473 case JVM_CONSTANT_Integer: {
duke@0 1474 u4 val = Bytes::get_Java_u4(bytes);
duke@0 1475 printf("int %d", *(int *) &val);
duke@0 1476 ent_size = 4;
duke@0 1477 break;
duke@0 1478 }
duke@0 1479 case JVM_CONSTANT_Float: {
duke@0 1480 u4 val = Bytes::get_Java_u4(bytes);
duke@0 1481 printf("float %5.3ff", *(float *) &val);
duke@0 1482 ent_size = 4;
duke@0 1483 break;
duke@0 1484 }
duke@0 1485 case JVM_CONSTANT_Long: {
duke@0 1486 u8 val = Bytes::get_Java_u8(bytes);
never@2731 1487 printf("long "INT64_FORMAT, (int64_t) *(jlong *) &val);
duke@0 1488 ent_size = 8;
duke@0 1489 idx++; // Long takes two cpool slots
duke@0 1490 break;
duke@0 1491 }
duke@0 1492 case JVM_CONSTANT_Double: {
duke@0 1493 u8 val = Bytes::get_Java_u8(bytes);
duke@0 1494 printf("double %5.3fd", *(jdouble *)&val);
duke@0 1495 ent_size = 8;
duke@0 1496 idx++; // Double takes two cpool slots
duke@0 1497 break;
duke@0 1498 }
duke@0 1499 case JVM_CONSTANT_Class: {
duke@0 1500 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1501 printf("class #%03d", idx1);
duke@0 1502 ent_size = 2;
duke@0 1503 break;
duke@0 1504 }
duke@0 1505 case JVM_CONSTANT_String: {
duke@0 1506 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1507 printf("String #%03d", idx1);
duke@0 1508 ent_size = 2;
duke@0 1509 break;
duke@0 1510 }
duke@0 1511 case JVM_CONSTANT_Fieldref: {
duke@0 1512 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1513 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 1514 printf("Field #%03d, #%03d", (int) idx1, (int) idx2);
duke@0 1515 ent_size = 4;
duke@0 1516 break;
duke@0 1517 }
duke@0 1518 case JVM_CONSTANT_Methodref: {
duke@0 1519 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1520 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 1521 printf("Method #%03d, #%03d", idx1, idx2);
duke@0 1522 ent_size = 4;
duke@0 1523 break;
duke@0 1524 }
duke@0 1525 case JVM_CONSTANT_InterfaceMethodref: {
duke@0 1526 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1527 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 1528 printf("InterfMethod #%03d, #%03d", idx1, idx2);
duke@0 1529 ent_size = 4;
duke@0 1530 break;
duke@0 1531 }
duke@0 1532 case JVM_CONSTANT_NameAndType: {
duke@0 1533 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1534 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 1535 printf("NameAndType #%03d, #%03d", idx1, idx2);
duke@0 1536 ent_size = 4;
duke@0 1537 break;
duke@0 1538 }
duke@0 1539 case JVM_CONSTANT_ClassIndex: {
duke@0 1540 printf("ClassIndex %s", WARN_MSG);
duke@0 1541 break;
duke@0 1542 }
duke@0 1543 case JVM_CONSTANT_UnresolvedClass: {
duke@0 1544 printf("UnresolvedClass: %s", WARN_MSG);
duke@0 1545 break;
duke@0 1546 }
duke@0 1547 case JVM_CONSTANT_UnresolvedClassInError: {
duke@0 1548 printf("UnresolvedClassInErr: %s", WARN_MSG);
duke@0 1549 break;
duke@0 1550 }
duke@0 1551 case JVM_CONSTANT_StringIndex: {
duke@0 1552 printf("StringIndex: %s", WARN_MSG);
duke@0 1553 break;
duke@0 1554 }
duke@0 1555 }
duke@0 1556 printf(";\n");
duke@0 1557 bytes += ent_size;
duke@0 1558 size += ent_size;
duke@0 1559 }
duke@0 1560 printf("Cpool size: %d\n", size);
duke@0 1561 fflush(0);
duke@0 1562 return;
duke@0 1563 } /* end print_cpool_bytes */
duke@0 1564
duke@0 1565
duke@0 1566 // Returns size of constant pool entry.
coleenp@3656 1567 jint ConstantPool::cpool_entry_size(jint idx) {
duke@0 1568 switch(tag_at(idx).value()) {
duke@0 1569 case JVM_CONSTANT_Invalid:
duke@0 1570 case JVM_CONSTANT_Unicode:
duke@0 1571 return 1;
duke@0 1572
duke@0 1573 case JVM_CONSTANT_Utf8:
duke@0 1574 return 3 + symbol_at(idx)->utf8_length();
duke@0 1575
duke@0 1576 case JVM_CONSTANT_Class:
duke@0 1577 case JVM_CONSTANT_String:
duke@0 1578 case JVM_CONSTANT_ClassIndex:
duke@0 1579 case JVM_CONSTANT_UnresolvedClass:
duke@0 1580 case JVM_CONSTANT_UnresolvedClassInError:
duke@0 1581 case JVM_CONSTANT_StringIndex:
jrose@1524 1582 case JVM_CONSTANT_MethodType:
iklam@5442 1583 case JVM_CONSTANT_MethodTypeInError:
duke@0 1584 return 3;
duke@0 1585
jrose@1524 1586 case JVM_CONSTANT_MethodHandle:
iklam@5442 1587 case JVM_CONSTANT_MethodHandleInError:
jrose@1524 1588 return 4; //tag, ref_kind, ref_index
jrose@1524 1589
duke@0 1590 case JVM_CONSTANT_Integer:
duke@0 1591 case JVM_CONSTANT_Float:
duke@0 1592 case JVM_CONSTANT_Fieldref:
duke@0 1593 case JVM_CONSTANT_Methodref:
duke@0 1594 case JVM_CONSTANT_InterfaceMethodref:
duke@0 1595 case JVM_CONSTANT_NameAndType:
jrose@1838 1596 return 5;
jrose@1838 1597
jrose@1583 1598 case JVM_CONSTANT_InvokeDynamic:
jrose@1924 1599 // u1 tag, u2 bsm, u2 nt
jrose@1924 1600 return 5;
duke@0 1601
duke@0 1602 case JVM_CONSTANT_Long:
duke@0 1603 case JVM_CONSTANT_Double:
duke@0 1604 return 9;
duke@0 1605 }
duke@0 1606 assert(false, "cpool_entry_size: Invalid constant pool entry tag");
duke@0 1607 return 1;
duke@0 1608 } /* end cpool_entry_size */
duke@0 1609
duke@0 1610
duke@0 1611 // SymbolHashMap is used to find a constant pool index from a string.
duke@0 1612 // This function fills in SymbolHashMaps, one for utf8s and one for
duke@0 1613 // class names, returns size of the cpool raw bytes.
coleenp@3656 1614 jint ConstantPool::hash_entries_to(SymbolHashMap *symmap,
duke@0 1615 SymbolHashMap *classmap) {
duke@0 1616 jint size = 0;
duke@0 1617
duke@0 1618 for (u2 idx = 1; idx < length(); idx++) {
duke@0 1619 u2 tag = tag_at(idx).value();
duke@0 1620 size += cpool_entry_size(idx);
duke@0 1621
duke@0 1622 switch(tag) {
duke@0 1623 case JVM_CONSTANT_Utf8: {
coleenp@2069 1624 Symbol* sym = symbol_at(idx);
duke@0 1625 symmap->add_entry(sym, idx);
duke@0 1626 DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx));
duke@0 1627 break;
duke@0 1628 }
duke@0 1629 case JVM_CONSTANT_Class:
duke@0 1630 case JVM_CONSTANT_UnresolvedClass:
duke@0 1631 case JVM_CONSTANT_UnresolvedClassInError: {
coleenp@2069 1632 Symbol* sym = klass_name_at(idx);
duke@0 1633 classmap->add_entry(sym, idx);
duke@0 1634 DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx));
duke@0 1635 break;
duke@0 1636 }
duke@0 1637 case JVM_CONSTANT_Long:
duke@0 1638 case JVM_CONSTANT_Double: {
duke@0 1639 idx++; // Both Long and Double take two cpool slots
duke@0 1640 break;
duke@0 1641 }
duke@0 1642 }
duke@0 1643 }
duke@0 1644 return size;
duke@0 1645 } /* end hash_utf8_entries_to */
duke@0 1646
duke@0 1647
duke@0 1648 // Copy cpool bytes.
duke@0 1649 // Returns:
duke@0 1650 // 0, in case of OutOfMemoryError
duke@0 1651 // -1, in case of internal error
duke@0 1652 // > 0, count of the raw cpool bytes that have been copied
coleenp@3656 1653 int ConstantPool::copy_cpool_bytes(int cpool_size,
duke@0 1654 SymbolHashMap* tbl,
duke@0 1655 unsigned char *bytes) {
duke@0 1656 u2 idx1, idx2;
duke@0 1657 jint size = 0;
duke@0 1658 jint cnt = length();
duke@0 1659 unsigned char *start_bytes = bytes;
duke@0 1660
duke@0 1661 for (jint idx = 1; idx < cnt; idx++) {
duke@0 1662 u1 tag = tag_at(idx).value();
duke@0 1663 jint ent_size = cpool_entry_size(idx);
duke@0 1664
duke@0 1665 assert(size + ent_size <= cpool_size, "Size mismatch");
duke@0 1666
duke@0 1667 *bytes = tag;
duke@0 1668 DBG(printf("#%03hd tag=%03hd, ", idx, tag));
duke@0 1669 switch(tag) {
duke@0 1670 case JVM_CONSTANT_Invalid: {
duke@0 1671 DBG(printf("JVM_CONSTANT_Invalid"));
duke@0 1672 break;
duke@0 1673 }
duke@0 1674 case JVM_CONSTANT_Unicode: {
duke@0 1675 assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode");
duke@0 1676 DBG(printf("JVM_CONSTANT_Unicode"));
duke@0 1677 break;
duke@0 1678 }
duke@0 1679 case JVM_CONSTANT_Utf8: {
coleenp@2069 1680 Symbol* sym = symbol_at(idx);
duke@0 1681 char* str = sym->as_utf8();
duke@0 1682 // Warning! It's crashing on x86 with len = sym->utf8_length()
duke@0 1683 int len = (int) strlen(str);
duke@0 1684 Bytes::put_Java_u2((address) (bytes+1), (u2) len);
duke@0 1685 for (int i = 0; i < len; i++) {
duke@0 1686 bytes[3+i] = (u1) str[i];
duke@0 1687 }
duke@0 1688 DBG(printf("JVM_CONSTANT_Utf8: %s ", str));
duke@0 1689 break;
duke@0 1690 }
duke@0 1691 case JVM_CONSTANT_Integer: {
duke@0 1692 jint val = int_at(idx);
duke@0 1693 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val);
duke@0 1694 break;
duke@0 1695 }
duke@0 1696 case JVM_CONSTANT_Float: {
duke@0 1697 jfloat val = float_at(idx);
duke@0 1698 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val);
duke@0 1699 break;
duke@0 1700 }
duke@0 1701 case JVM_CONSTANT_Long: {
duke@0 1702 jlong val = long_at(idx);
duke@0 1703 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val);
duke@0 1704 idx++; // Long takes two cpool slots
duke@0 1705 break;
duke@0 1706 }
duke@0 1707 case JVM_CONSTANT_Double: {
duke@0 1708 jdouble val = double_at(idx);
duke@0 1709 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val);
duke@0 1710 idx++; // Double takes two cpool slots
duke@0 1711 break;
duke@0 1712 }
duke@0 1713 case JVM_CONSTANT_Class:
duke@0 1714 case JVM_CONSTANT_UnresolvedClass:
duke@0 1715 case JVM_CONSTANT_UnresolvedClassInError: {
duke@0 1716 *bytes = JVM_CONSTANT_Class;
coleenp@2069 1717 Symbol* sym = klass_name_at(idx);
duke@0 1718 idx1 = tbl->symbol_to_value(sym);
duke@0 1719 assert(idx1 != 0, "Have not found a hashtable entry");
duke@0 1720 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1721 DBG(printf("JVM_CONSTANT_Class: idx=#%03hd, %s", idx1, sym->as_utf8()));
duke@0 1722 break;
duke@0 1723 }
duke@0 1724 case JVM_CONSTANT_String: {
duke@0 1725 *bytes = JVM_CONSTANT_String;
coleenp@2069 1726 Symbol* sym = unresolved_string_at(idx);
duke@0 1727 idx1 = tbl->symbol_to_value(sym);
duke@0 1728 assert(idx1 != 0, "Have not found a hashtable entry");
duke@0 1729 Bytes::put_Java_u2((address) (bytes+1), idx1);
mikael@4540 1730 DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, sym->as_utf8()));
duke@0 1731 break;
duke@0 1732 }
duke@0 1733 case JVM_CONSTANT_Fieldref:
duke@0 1734 case JVM_CONSTANT_Methodref:
duke@0 1735 case JVM_CONSTANT_InterfaceMethodref: {
duke@0 1736 idx1 = uncached_klass_ref_index_at(idx);
duke@0 1737 idx2 = uncached_name_and_type_ref_index_at(idx);
duke@0 1738 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1739 Bytes::put_Java_u2((address) (bytes+3), idx2);
duke@0 1740 DBG(printf("JVM_CONSTANT_Methodref: %hd %hd", idx1, idx2));
duke@0 1741 break;
duke@0 1742 }
duke@0 1743 case JVM_CONSTANT_NameAndType: {
duke@0 1744 idx1 = name_ref_index_at(idx);
duke@0 1745 idx2 = signature_ref_index_at(idx);
duke@0 1746 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1747 Bytes::put_Java_u2((address) (bytes+3), idx2);
duke@0 1748 DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2));
duke@0 1749 break;
duke@0 1750 }
duke@0 1751 case JVM_CONSTANT_ClassIndex: {
duke@0 1752 *bytes = JVM_CONSTANT_Class;
duke@0 1753 idx1 = klass_index_at(idx);
duke@0 1754 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1755 DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1));
duke@0 1756 break;
duke@0 1757 }
duke@0 1758 case JVM_CONSTANT_StringIndex: {
duke@0 1759 *bytes = JVM_CONSTANT_String;
duke@0 1760 idx1 = string_index_at(idx);
duke@0 1761 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1762 DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1));
duke@0 1763 break;
duke@0 1764 }
coleenp@3656 1765 case JVM_CONSTANT_MethodHandle:
coleenp@3656 1766 case JVM_CONSTANT_MethodHandleInError: {
jrose@1524 1767 *bytes = JVM_CONSTANT_MethodHandle;
iklam@5442 1768 int kind = method_handle_ref_kind_at_error_ok(idx);
iklam@5442 1769 idx1 = method_handle_index_at_error_ok(idx);
jrose@1524 1770 *(bytes+1) = (unsigned char) kind;
jrose@1524 1771 Bytes::put_Java_u2((address) (bytes+2), idx1);
jrose@1524 1772 DBG(printf("JVM_CONSTANT_MethodHandle: %d %hd", kind, idx1));
jrose@1524 1773 break;
jrose@1524 1774 }
coleenp@3656 1775 case JVM_CONSTANT_MethodType:
coleenp@3656 1776 case JVM_CONSTANT_MethodTypeInError: {
jrose@1524 1777 *bytes = JVM_CONSTANT_MethodType;
iklam@5442 1778 idx1 = method_type_index_at_error_ok(idx);
jrose@1524 1779 Bytes::put_Java_u2((address) (bytes+1), idx1);
jrose@1524 1780 DBG(printf("JVM_CONSTANT_MethodType: %hd", idx1));
jrose@1524 1781 break;
jrose@1524 1782 }
jrose@1583 1783 case JVM_CONSTANT_InvokeDynamic: {
jrose@1924 1784 *bytes = tag;
jrose@1924 1785 idx1 = extract_low_short_from_int(*int_at_addr(idx));
jrose@1924 1786 idx2 = extract_high_short_from_int(*int_at_addr(idx));
jrose@1924 1787 assert(idx2 == invoke_dynamic_name_and_type_ref_index_at(idx), "correct half of u4");
jrose@1583 1788 Bytes::put_Java_u2((address) (bytes+1), idx1);
jrose@1583 1789 Bytes::put_Java_u2((address) (bytes+3), idx2);
jrose@1924 1790 DBG(printf("JVM_CONSTANT_InvokeDynamic: %hd %hd", idx1, idx2));
jrose@1583 1791 break;
jrose@1583 1792 }
duke@0 1793 }
duke@0 1794 DBG(printf("\n"));
duke@0 1795 bytes += ent_size;
duke@0 1796 size += ent_size;
duke@0 1797 }
duke@0 1798 assert(size == cpool_size, "Size mismatch");
duke@0 1799
duke@0 1800 // Keep temorarily for debugging until it's stable.
duke@0 1801 DBG(print_cpool_bytes(cnt, start_bytes));
duke@0 1802 return (int)(bytes - start_bytes);
duke@0 1803 } /* end copy_cpool_bytes */
duke@0 1804
mikael@4540 1805 #undef DBG
mikael@4540 1806
duke@0 1807
coleenp@3656 1808 void ConstantPool::set_on_stack(const bool value) {
coleenp@4132 1809 if (value) {
coleenp@4132 1810 _flags |= _on_stack;
coleenp@4132 1811 } else {
coleenp@4132 1812 _flags &= ~_on_stack;
coleenp@4132 1813 }
coleenp@3656 1814 if (value) MetadataOnStackMark::record(this);
coleenp@3656 1815 }
coleenp@3656 1816
coleenp@3656 1817 // JSR 292 support for patching constant pool oops after the class is linked and
coleenp@3656 1818 // the oop array for resolved references are created.
coleenp@3656 1819 // We can't do this during classfile parsing, which is how the other indexes are
coleenp@3656 1820 // patched. The other patches are applied early for some error checking
coleenp@3656 1821 // so only defer the pseudo_strings.
coleenp@3656 1822 void ConstantPool::patch_resolved_references(
coleenp@3656 1823 GrowableArray<Handle>* cp_patches) {
coleenp@3656 1824 assert(EnableInvokeDynamic, "");
coleenp@3656 1825 for (int index = 1; index < cp_patches->length(); index++) { // Index 0 is unused
coleenp@3656 1826 Handle patch = cp_patches->at(index);
coleenp@3656 1827 if (patch.not_null()) {
coleenp@3656 1828 assert (tag_at(index).is_string(), "should only be string left");
coleenp@3656 1829 // Patching a string means pre-resolving it.
coleenp@3656 1830 // The spelling in the constant pool is ignored.
coleenp@3656 1831 // The constant reference may be any object whatever.
coleenp@3656 1832 // If it is not a real interned string, the constant is referred
coleenp@3656 1833 // to as a "pseudo-string", and must be presented to the CP
coleenp@3656 1834 // explicitly, because it may require scavenging.
coleenp@3656 1835 int obj_index = cp_to_object_index(index);
coleenp@3656 1836 pseudo_string_at_put(index, obj_index, patch());
coleenp@3656 1837 DEBUG_ONLY(cp_patches->at_put(index, Handle());)
coleenp@3656 1838 }
coleenp@3656 1839 }
coleenp@3656 1840 #ifdef ASSERT
coleenp@3656 1841 // Ensure that all the patches have been used.
coleenp@3656 1842 for (int index = 0; index < cp_patches->length(); index++) {
coleenp@3656 1843 assert(cp_patches->at(index).is_null(),
coleenp@3656 1844 err_msg("Unused constant pool patch at %d in class file %s",
coleenp@3656 1845 index,
coleenp@3880 1846 pool_holder()->external_name()));
coleenp@3656 1847 }
coleenp@3656 1848 #endif // ASSERT
coleenp@3656 1849 }
coleenp@3656 1850
coleenp@3656 1851 #ifndef PRODUCT
coleenp@3656 1852
coleenp@3656 1853 // CompileTheWorld support. Preload all classes loaded references in the passed in constantpool
coleenp@3656 1854 void ConstantPool::preload_and_initialize_all_classes(ConstantPool* obj, TRAPS) {
coleenp@3656 1855 guarantee(obj->is_constantPool(), "object must be constant pool");
coleenp@3656 1856 constantPoolHandle cp(THREAD, (ConstantPool*)obj);
coleenp@3656 1857 guarantee(cp->pool_holder() != NULL, "must be fully loaded");
coleenp@3656 1858
coleenp@3656 1859 for (int i = 0; i< cp->length(); i++) {
coleenp@3656 1860 if (cp->tag_at(i).is_unresolved_klass()) {
coleenp@3656 1861 // This will force loading of the class
coleenp@3656 1862 Klass* klass = cp->klass_at(i, CHECK);
coleenp@3656 1863 if (klass->oop_is_instance()) {
coleenp@3656 1864 // Force initialization of class
coleenp@3656 1865 InstanceKlass::cast(klass)->initialize(CHECK);
coleenp@3656 1866 }
coleenp@3656 1867 }
coleenp@3656 1868 }
coleenp@3656 1869 }
coleenp@3656 1870
coleenp@3656 1871 #endif
coleenp@3656 1872
coleenp@3656 1873
coleenp@3656 1874 // Printing
coleenp@3656 1875
coleenp@3656 1876 void ConstantPool::print_on(outputStream* st) const {
coleenp@3656 1877 EXCEPTION_MARK;
coleenp@3656 1878 assert(is_constantPool(), "must be constantPool");
coleenp@3656 1879 st->print_cr(internal_name());
coleenp@3656 1880 if (flags() != 0) {
coleenp@3656 1881 st->print(" - flags: 0x%x", flags());
coleenp@3656 1882 if (has_preresolution()) st->print(" has_preresolution");
coleenp@4132 1883 if (on_stack()) st->print(" on_stack");
coleenp@3656 1884 st->cr();
coleenp@3656 1885 }
coleenp@3656 1886 if (pool_holder() != NULL) {
coleenp@3656 1887 st->print_cr(" - holder: " INTPTR_FORMAT, pool_holder());
coleenp@3656 1888 }
coleenp@3656 1889 st->print_cr(" - cache: " INTPTR_FORMAT, cache());
hseigel@5466 1890 st->print_cr(" - resolved_references: " INTPTR_FORMAT, (void *)resolved_references());
coleenp@3656 1891 st->print_cr(" - reference_map: " INTPTR_FORMAT, reference_map());
coleenp@3656 1892
coleenp@3656 1893 for (int index = 1; index < length(); index++) { // Index 0 is unused
coleenp@3656 1894 ((ConstantPool*)this)->print_entry_on(index, st);
coleenp@3656 1895 switch (tag_at(index).value()) {
coleenp@3656 1896 case JVM_CONSTANT_Long :
coleenp@3656 1897 case JVM_CONSTANT_Double :
coleenp@3656 1898 index++; // Skip entry following eigth-byte constant
coleenp@3656 1899 }
coleenp@3656 1900
coleenp@3656 1901 }
coleenp@3656 1902 st->cr();
coleenp@3656 1903 }
coleenp@3656 1904
coleenp@3656 1905 // Print one constant pool entry
coleenp@3656 1906 void ConstantPool::print_entry_on(const int index, outputStream* st) {
coleenp@3656 1907 EXCEPTION_MARK;
coleenp@3656 1908 st->print(" - %3d : ", index);
coleenp@3656 1909 tag_at(index).print_on(st);
coleenp@3656 1910 st->print(" : ");
coleenp@3656 1911 switch (tag_at(index).value()) {
coleenp@3656 1912 case JVM_CONSTANT_Class :
coleenp@3656 1913 { Klass* k = klass_at(index, CATCH);
morris@4430 1914 guarantee(k != NULL, "need klass");
coleenp@3656 1915 k->print_value_on(st);
coleenp@3656 1916 st->print(" {0x%lx}", (address)k);
coleenp@3656 1917 }
coleenp@3656 1918 break;
coleenp@3656 1919 case JVM_CONSTANT_Fieldref :
coleenp@3656 1920 case JVM_CONSTANT_Methodref :
coleenp@3656 1921 case JVM_CONSTANT_InterfaceMethodref :
coleenp@3656 1922 st->print("klass_index=%d", uncached_klass_ref_index_at(index));
coleenp@3656 1923 st->print(" name_and_type_index=%d", uncached_name_and_type_ref_index_at(index));
coleenp@3656 1924 break;
coleenp@3656 1925 case JVM_CONSTANT_String :
coleenp@4288 1926 if (is_pseudo_string_at(index)) {
coleenp@4288 1927 oop anObj = pseudo_string_at(index);
coleenp@4288 1928 anObj->print_value_on(st);
coleenp@4288 1929 st->print(" {0x%lx}", (address)anObj);
coleenp@4288 1930 } else {
coleenp@4288 1931 unresolved_string_at(index)->print_value_on(st);
coleenp@4288 1932 }
coleenp@3656 1933 break;
coleenp@3656 1934 case JVM_CONSTANT_Integer :
coleenp@3656 1935 st->print("%d", int_at(index));
coleenp@3656 1936 break;
coleenp@3656 1937 case JVM_CONSTANT_Float :
coleenp@3656 1938 st->print("%f", float_at(index));
coleenp@3656 1939 break;
coleenp@3656 1940 case JVM_CONSTANT_Long :
coleenp@3656 1941 st->print_jlong(long_at(index));
coleenp@3656 1942 break;
coleenp@3656 1943 case JVM_CONSTANT_Double :
coleenp@3656 1944 st->print("%lf", double_at(index));
coleenp@3656 1945 break;
coleenp@3656 1946 case JVM_CONSTANT_NameAndType :
coleenp@3656 1947 st->print("name_index=%d", name_ref_index_at(index));
coleenp@3656 1948 st->print(" signature_index=%d", signature_ref_index_at(index));
coleenp@3656 1949 break;
coleenp@3656 1950 case JVM_CONSTANT_Utf8 :
coleenp@3656 1951 symbol_at(index)->print_value_on(st);
coleenp@3656 1952 break;
coleenp@3656 1953 case JVM_CONSTANT_UnresolvedClass : // fall-through
coleenp@3656 1954 case JVM_CONSTANT_UnresolvedClassInError: {
coleenp@3656 1955 // unresolved_klass_at requires lock or safe world.
coleenp@3656 1956 CPSlot entry = slot_at(index);
coleenp@3656 1957 if (entry.is_resolved()) {
coleenp@3656 1958 entry.get_klass()->print_value_on(st);
coleenp@3656 1959 } else {
coleenp@3656 1960 entry.get_symbol()->print_value_on(st);
coleenp@3656 1961 }
coleenp@3656 1962 }
coleenp@3656 1963 break;
coleenp@3656 1964 case JVM_CONSTANT_MethodHandle :
coleenp@3656 1965 case JVM_CONSTANT_MethodHandleInError :
iklam@5442 1966 st->print("ref_kind=%d", method_handle_ref_kind_at_error_ok(index));
iklam@5442 1967 st->print(" ref_index=%d", method_handle_index_at_error_ok(index));
coleenp@3656 1968 break;
coleenp@3656 1969 case JVM_CONSTANT_MethodType :
coleenp@3656 1970 case JVM_CONSTANT_MethodTypeInError :
iklam@5442 1971 st->print("signature_index=%d", method_type_index_at_error_ok(index));
coleenp@3656 1972 break;
coleenp@3656 1973 case JVM_CONSTANT_InvokeDynamic :
coleenp@3656 1974 {
coleenp@3656 1975 st->print("bootstrap_method_index=%d", invoke_dynamic_bootstrap_method_ref_index_at(index));
coleenp@3656 1976 st->print(" name_and_type_index=%d", invoke_dynamic_name_and_type_ref_index_at(index));
coleenp@3656 1977 int argc = invoke_dynamic_argument_count_at(index);
coleenp@3656 1978 if (argc > 0) {
coleenp@3656 1979 for (int arg_i = 0; arg_i < argc; arg_i++) {
coleenp@3656 1980 int arg = invoke_dynamic_argument_index_at(index, arg_i);
coleenp@3656 1981 st->print((arg_i == 0 ? " arguments={%d" : ", %d"), arg);
coleenp@3656 1982 }
coleenp@3656 1983 st->print("}");
coleenp@3656 1984 }
coleenp@3656 1985 }
coleenp@3656 1986 break;
coleenp@3656 1987 default:
coleenp@3656 1988 ShouldNotReachHere();
coleenp@3656 1989 break;
coleenp@3656 1990 }
coleenp@3656 1991 st->cr();
coleenp@3656 1992 }
coleenp@3656 1993
coleenp@3656 1994 void ConstantPool::print_value_on(outputStream* st) const {
coleenp@3656 1995 assert(is_constantPool(), "must be constantPool");
coleenp@3656 1996 st->print("constant pool [%d]", length());
coleenp@3656 1997 if (has_preresolution()) st->print("/preresolution");
coleenp@3656 1998 if (operands() != NULL) st->print("/operands[%d]", operands()->length());
coleenp@3656 1999 print_address_on(st);
coleenp@3656 2000 st->print(" for ");
coleenp@3656 2001 pool_holder()->print_value_on(st);
coleenp@3656 2002 if (pool_holder() != NULL) {
coleenp@3880 2003 bool extra = (pool_holder()->constants() != this);
coleenp@3656 2004 if (extra) st->print(" (extra)");
coleenp@3656 2005 }
coleenp@3656 2006 if (cache() != NULL) {
coleenp@3656 2007 st->print(" cache=" PTR_FORMAT, cache());
coleenp@3656 2008 }
coleenp@3656 2009 }
coleenp@3656 2010
acorn@4139 2011 #if INCLUDE_SERVICES
acorn@4139 2012 // Size Statistics
acorn@4139 2013 void ConstantPool::collect_statistics(KlassSizeStats *sz) const {
acorn@4139 2014 sz->_cp_all_bytes += (sz->_cp_bytes = sz->count(this));
acorn@4139 2015 sz->_cp_all_bytes += (sz->_cp_tags_bytes = sz->count_array(tags()));
acorn@4139 2016 sz->_cp_all_bytes += (sz->_cp_cache_bytes = sz->count(cache()));
acorn@4139 2017 sz->_cp_all_bytes += (sz->_cp_operands_bytes = sz->count_array(operands()));
acorn@4139 2018 sz->_cp_all_bytes += (sz->_cp_refmap_bytes = sz->count_array(reference_map()));
acorn@4139 2019
acorn@4139 2020 sz->_ro_bytes += sz->_cp_operands_bytes + sz->_cp_tags_bytes +
acorn@4139 2021 sz->_cp_refmap_bytes;
acorn@4139 2022 sz->_rw_bytes += sz->_cp_bytes + sz->_cp_cache_bytes;
acorn@4139 2023 }
acorn@4139 2024 #endif // INCLUDE_SERVICES
coleenp@3656 2025
coleenp@3656 2026 // Verification
coleenp@3656 2027
coleenp@3656 2028 void ConstantPool::verify_on(outputStream* st) {
coleenp@3656 2029 guarantee(is_constantPool(), "object must be constant pool");
coleenp@3656 2030 for (int i = 0; i< length(); i++) {
coleenp@3656 2031 constantTag tag = tag_at(i);
coleenp@3656 2032 CPSlot entry = slot_at(i);
coleenp@3656 2033 if (tag.is_klass()) {
coleenp@3656 2034 if (entry.is_resolved()) {
coleenp@3656 2035 guarantee(entry.get_klass()->is_klass(), "should be klass");
coleenp@3656 2036 }
coleenp@3656 2037 } else if (tag.is_unresolved_klass()) {
coleenp@3656 2038 if (entry.is_resolved()) {
coleenp@3656 2039 guarantee(entry.get_klass()->is_klass(), "should be klass");
coleenp@3656 2040 }
coleenp@3656 2041 } else if (tag.is_symbol()) {
coleenp@3656 2042 guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count");
coleenp@3656 2043 } else if (tag.is_string()) {
coleenp@3656 2044 guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count");
coleenp@3656 2045 }
coleenp@3656 2046 }
coleenp@3656 2047 if (cache() != NULL) {
coleenp@3656 2048 // Note: cache() can be NULL before a class is completely setup or
coleenp@3656 2049 // in temporary constant pools used during constant pool merging
coleenp@3656 2050 guarantee(cache()->is_constantPoolCache(), "should be constant pool cache");
coleenp@3656 2051 }
coleenp@3656 2052 if (pool_holder() != NULL) {
coleenp@3656 2053 // Note: pool_holder() can be NULL in temporary constant pools
coleenp@3656 2054 // used during constant pool merging
coleenp@3656 2055 guarantee(pool_holder()->is_klass(), "should be klass");
coleenp@3656 2056 }
coleenp@3656 2057 }
coleenp@3656 2058
coleenp@3656 2059
coleenp@2069 2060 void SymbolHashMap::add_entry(Symbol* sym, u2 value) {
duke@0 2061 char *str = sym->as_utf8();
duke@0 2062 unsigned int hash = compute_hash(str, sym->utf8_length());
duke@0 2063 unsigned int index = hash % table_size();
duke@0 2064
duke@0 2065 // check if already in map
duke@0 2066 // we prefer the first entry since it is more likely to be what was used in
duke@0 2067 // the class file
duke@0 2068 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) {
duke@0 2069 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@0 2070 if (en->hash() == hash && en->symbol() == sym) {
duke@0 2071 return; // already there
duke@0 2072 }
duke@0 2073 }
duke@0 2074
duke@0 2075 SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value);
duke@0 2076 entry->set_next(bucket(index));
duke@0 2077 _buckets[index].set_entry(entry);
duke@0 2078 assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@0 2079 }
duke@0 2080
coleenp@2069 2081 SymbolHashMapEntry* SymbolHashMap::find_entry(Symbol* sym) {
duke@0 2082 assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL");
duke@0 2083 char *str = sym->as_utf8();
duke@0 2084 int len = sym->utf8_length();
duke@0 2085 unsigned int hash = SymbolHashMap::compute_hash(str, len);
duke@0 2086 unsigned int index = hash % table_size();
duke@0 2087 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) {
duke@0 2088 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@0 2089 if (en->hash() == hash && en->symbol() == sym) {
duke@0 2090 return en;
duke@0 2091 }
duke@0 2092 }
duke@0 2093 return NULL;
duke@0 2094 }