annotate src/share/vm/oops/constantPool.cpp @ 4132:5daaddd917a1

8006040: NPG: on_stack processing wastes space in ConstantPool Summary: Added on_stack bit to flags. Also MetadataMarkOnStack is used for more than JVMTI so had to be moved. Reviewed-by: dholmes, stefank
author coleenp
date Wed, 23 Jan 2013 10:34:29 -0500
parents b14da2e6f2dc
children edd76a5856f7 16fb9f942703
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"
coleenp@3656 33 #include "memory/metadataFactory.hpp"
stefank@1885 34 #include "memory/oopFactory.hpp"
coleenp@3656 35 #include "oops/constantPool.hpp"
stefank@1885 36 #include "oops/instanceKlass.hpp"
stefank@1885 37 #include "oops/objArrayKlass.hpp"
stefank@1885 38 #include "runtime/fieldType.hpp"
stefank@1885 39 #include "runtime/init.hpp"
coleenp@3656 40 #include "runtime/javaCalls.hpp"
stefank@1885 41 #include "runtime/signature.hpp"
stefank@1885 42 #include "runtime/vframe.hpp"
duke@0 43
coleenp@3656 44 ConstantPool* ConstantPool::allocate(ClassLoaderData* loader_data, int length, TRAPS) {
coleenp@3656 45 // Tags are RW but comment below applies to tags also.
coleenp@3656 46 Array<u1>* tags = MetadataFactory::new_writeable_array<u1>(loader_data, length, 0, CHECK_NULL);
coleenp@3656 47
coleenp@3656 48 int size = ConstantPool::size(length);
coleenp@3656 49
coleenp@3656 50 // CDS considerations:
coleenp@3656 51 // Allocate read-write but may be able to move to read-only at dumping time
coleenp@3656 52 // if all the klasses are resolved. The only other field that is writable is
coleenp@3656 53 // the resolved_references array, which is recreated at startup time.
coleenp@3656 54 // But that could be moved to InstanceKlass (although a pain to access from
coleenp@3656 55 // assembly code). Maybe it could be moved to the cpCache which is RW.
coleenp@3656 56 return new (loader_data, size, false, THREAD) ConstantPool(tags);
coleenp@3656 57 }
coleenp@3656 58
coleenp@3656 59 ConstantPool::ConstantPool(Array<u1>* tags) {
coleenp@3656 60 set_length(tags->length());
coleenp@3656 61 set_tags(NULL);
coleenp@3656 62 set_cache(NULL);
coleenp@3656 63 set_reference_map(NULL);
coleenp@3656 64 set_resolved_references(NULL);
coleenp@3656 65 set_operands(NULL);
coleenp@3656 66 set_pool_holder(NULL);
coleenp@3656 67 set_flags(0);
coleenp@4132 68
coleenp@3656 69 // only set to non-zero if constant pool is merged by RedefineClasses
coleenp@4108 70 set_version(0);
coleenp@3656 71 set_lock(new Monitor(Monitor::nonleaf + 2, "A constant pool lock"));
coleenp@3656 72
coleenp@3656 73 // initialize tag array
coleenp@3656 74 int length = tags->length();
coleenp@3656 75 for (int index = 0; index < length; index++) {
coleenp@3656 76 tags->at_put(index, JVM_CONSTANT_Invalid);
coleenp@3656 77 }
coleenp@3656 78 set_tags(tags);
coleenp@3656 79 }
coleenp@3656 80
coleenp@3656 81 void ConstantPool::deallocate_contents(ClassLoaderData* loader_data) {
coleenp@3656 82 MetadataFactory::free_metadata(loader_data, cache());
coleenp@3656 83 set_cache(NULL);
coleenp@3656 84 MetadataFactory::free_array<jushort>(loader_data, operands());
coleenp@3656 85 set_operands(NULL);
coleenp@3656 86
coleenp@3656 87 release_C_heap_structures();
coleenp@3656 88
coleenp@3656 89 // free tag array
coleenp@3656 90 MetadataFactory::free_array<u1>(loader_data, tags());
coleenp@3656 91 set_tags(NULL);
coleenp@3656 92 }
coleenp@3656 93
coleenp@3656 94 void ConstantPool::release_C_heap_structures() {
coleenp@3656 95 // walk constant pool and decrement symbol reference counts
coleenp@3656 96 unreference_symbols();
coleenp@3656 97
coleenp@3656 98 delete _lock;
coleenp@3656 99 set_lock(NULL);
coleenp@3656 100 }
coleenp@3656 101
coleenp@3656 102 objArrayOop ConstantPool::resolved_references() const {
coleenp@3656 103 return (objArrayOop)JNIHandles::resolve(_resolved_references);
coleenp@3656 104 }
coleenp@3656 105
coleenp@3656 106 // Create resolved_references array and mapping array for original cp indexes
coleenp@3656 107 // The ldc bytecode was rewritten to have the resolved reference array index so need a way
coleenp@3656 108 // to map it back for resolving and some unlikely miscellaneous uses.
coleenp@3656 109 // The objects created by invokedynamic are appended to this list.
coleenp@3656 110 void ConstantPool::initialize_resolved_references(ClassLoaderData* loader_data,
coleenp@3656 111 intStack reference_map,
coleenp@3656 112 int constant_pool_map_length,
coleenp@3656 113 TRAPS) {
coleenp@3656 114 // Initialized the resolved object cache.
coleenp@3656 115 int map_length = reference_map.length();
coleenp@3656 116 if (map_length > 0) {
coleenp@3656 117 // Only need mapping back to constant pool entries. The map isn't used for
coleenp@3656 118 // invokedynamic resolved_reference entries. The constant pool cache index
coleenp@3656 119 // has the mapping back to both the constant pool and to the resolved
coleenp@3656 120 // reference index.
coleenp@3656 121 if (constant_pool_map_length > 0) {
coleenp@3656 122 Array<u2>* om = MetadataFactory::new_array<u2>(loader_data, map_length, CHECK);
coleenp@3656 123
coleenp@3656 124 for (int i = 0; i < constant_pool_map_length; i++) {
coleenp@3656 125 int x = reference_map.at(i);
coleenp@3656 126 assert(x == (int)(jushort) x, "klass index is too big");
coleenp@3656 127 om->at_put(i, (jushort)x);
coleenp@3656 128 }
coleenp@3656 129 set_reference_map(om);
coleenp@3656 130 }
coleenp@3656 131
coleenp@3656 132 // Create Java array for holding resolved strings, methodHandles,
coleenp@3656 133 // methodTypes, invokedynamic and invokehandle appendix objects, etc.
coleenp@3656 134 objArrayOop stom = oopFactory::new_objArray(SystemDictionary::Object_klass(), map_length, CHECK);
coleenp@3656 135 Handle refs_handle (THREAD, (oop)stom); // must handleize.
coleenp@3656 136 set_resolved_references(loader_data->add_handle(refs_handle));
coleenp@3656 137 }
coleenp@3656 138 }
coleenp@3656 139
coleenp@3656 140 // CDS support. Create a new resolved_references array.
coleenp@3656 141 void ConstantPool::restore_unshareable_info(TRAPS) {
coleenp@3664 142
coleenp@3664 143 // restore the C++ vtable from the shared archive
coleenp@3664 144 restore_vtable();
coleenp@3664 145
coleenp@3656 146 if (SystemDictionary::Object_klass_loaded()) {
coleenp@3656 147 // Recreate the object array and add to ClassLoaderData.
coleenp@3656 148 int map_length = resolved_reference_length();
coleenp@3656 149 if (map_length > 0) {
coleenp@3656 150 objArrayOop stom = oopFactory::new_objArray(SystemDictionary::Object_klass(), map_length, CHECK);
coleenp@3656 151 Handle refs_handle (THREAD, (oop)stom); // must handleize.
coleenp@3656 152
coleenp@3656 153 ClassLoaderData* loader_data = pool_holder()->class_loader_data();
coleenp@3656 154 set_resolved_references(loader_data->add_handle(refs_handle));
coleenp@3656 155 }
coleenp@3656 156
coleenp@3656 157 // Also need to recreate the mutex. Make sure this matches the constructor
coleenp@3656 158 set_lock(new Monitor(Monitor::nonleaf + 2, "A constant pool lock"));
coleenp@3656 159 }
coleenp@3656 160 }
coleenp@3656 161
coleenp@3656 162 void ConstantPool::remove_unshareable_info() {
coleenp@3656 163 // Resolved references are not in the shared archive.
coleenp@3656 164 // Save the length for restoration. It is not necessarily the same length
coleenp@3656 165 // as reference_map.length() if invokedynamic is saved.
coleenp@3656 166 set_resolved_reference_length(
coleenp@3656 167 resolved_references() != NULL ? resolved_references()->length() : 0);
coleenp@3656 168 set_resolved_references(NULL);
coleenp@3656 169 set_lock(NULL);
coleenp@3656 170 }
coleenp@3656 171
coleenp@3656 172 int ConstantPool::cp_to_object_index(int cp_index) {
coleenp@3656 173 // this is harder don't do this so much.
coleenp@3656 174 for (int i = 0; i< reference_map()->length(); i++) {
coleenp@3656 175 if (reference_map()->at(i) == cp_index) return i;
coleenp@3656 176 // Zero entry is divider between constant pool indices for strings,
coleenp@3656 177 // method handles and method types. After that the index is a constant
coleenp@3656 178 // pool cache index for invokedynamic. Stop when zero (which can never
coleenp@3656 179 // be a constant pool index)
coleenp@3656 180 if (reference_map()->at(i) == 0) break;
coleenp@3656 181 }
coleenp@3656 182 // We might not find the index.
coleenp@3656 183 return _no_index_sentinel;
coleenp@3656 184 }
coleenp@3656 185
coleenp@3656 186 Klass* ConstantPool::klass_at_impl(constantPoolHandle this_oop, int which, TRAPS) {
coleenp@3656 187 // A resolved constantPool entry will contain a Klass*, otherwise a Symbol*.
duke@0 188 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and
duke@0 189 // tag is not updated atomicly.
coleenp@3656 190
coleenp@2069 191 CPSlot entry = this_oop->slot_at(which);
coleenp@3656 192 if (entry.is_resolved()) {
coleenp@3656 193 assert(entry.get_klass()->is_klass(), "must be");
duke@0 194 // Already resolved - return entry.
coleenp@3656 195 return entry.get_klass();
duke@0 196 }
duke@0 197
duke@0 198 // Acquire lock on constant oop while doing update. After we get the lock, we check if another object
duke@0 199 // already has updated the object
duke@0 200 assert(THREAD->is_Java_thread(), "must be a Java thread");
duke@0 201 bool do_resolve = false;
duke@0 202 bool in_error = false;
duke@0 203
coleenp@3656 204 // Create a handle for the mirror. This will preserve the resolved class
coleenp@3656 205 // until the loader_data is registered.
coleenp@3656 206 Handle mirror_handle;
coleenp@3656 207
coleenp@2069 208 Symbol* name = NULL;
duke@0 209 Handle loader;
coleenp@3656 210 { MonitorLockerEx ml(this_oop->lock());
duke@0 211
duke@0 212 if (this_oop->tag_at(which).is_unresolved_klass()) {
duke@0 213 if (this_oop->tag_at(which).is_unresolved_klass_in_error()) {
duke@0 214 in_error = true;
duke@0 215 } else {
duke@0 216 do_resolve = true;
coleenp@2069 217 name = this_oop->unresolved_klass_at(which);
coleenp@3880 218 loader = Handle(THREAD, this_oop->pool_holder()->class_loader());
duke@0 219 }
duke@0 220 }
duke@0 221 } // unlocking constantPool
duke@0 222
duke@0 223
duke@0 224 // The original attempt to resolve this constant pool entry failed so find the
duke@0 225 // original error and throw it again (JVMS 5.4.3).
duke@0 226 if (in_error) {
coleenp@2069 227 Symbol* error = SystemDictionary::find_resolution_error(this_oop, which);
coleenp@2069 228 guarantee(error != (Symbol*)NULL, "tag mismatch with resolution error table");
duke@0 229 ResourceMark rm;
duke@0 230 // exception text will be the class name
duke@0 231 const char* className = this_oop->unresolved_klass_at(which)->as_C_string();
duke@0 232 THROW_MSG_0(error, className);
duke@0 233 }
duke@0 234
duke@0 235 if (do_resolve) {
duke@0 236 // this_oop must be unlocked during resolve_or_fail
coleenp@3880 237 oop protection_domain = this_oop->pool_holder()->protection_domain();
duke@0 238 Handle h_prot (THREAD, protection_domain);
coleenp@3656 239 Klass* k_oop = SystemDictionary::resolve_or_fail(name, loader, h_prot, true, THREAD);
duke@0 240 KlassHandle k;
duke@0 241 if (!HAS_PENDING_EXCEPTION) {
duke@0 242 k = KlassHandle(THREAD, k_oop);
coleenp@3656 243 // preserve the resolved klass.
coleenp@3656 244 mirror_handle = Handle(THREAD, k_oop->java_mirror());
duke@0 245 // Do access check for klasses
duke@0 246 verify_constant_pool_resolve(this_oop, k, THREAD);
duke@0 247 }
duke@0 248
duke@0 249 // Failed to resolve class. We must record the errors so that subsequent attempts
duke@0 250 // to resolve this constant pool entry fail with the same error (JVMS 5.4.3).
duke@0 251 if (HAS_PENDING_EXCEPTION) {
duke@0 252 ResourceMark rm;
coleenp@3656 253 Symbol* error = PENDING_EXCEPTION->klass()->name();
duke@0 254
duke@0 255 bool throw_orig_error = false;
duke@0 256 {
coleenp@3656 257 MonitorLockerEx ml(this_oop->lock());
duke@0 258
duke@0 259 // some other thread has beaten us and has resolved the class.
duke@0 260 if (this_oop->tag_at(which).is_klass()) {
duke@0 261 CLEAR_PENDING_EXCEPTION;
duke@0 262 entry = this_oop->resolved_klass_at(which);
coleenp@3656 263 return entry.get_klass();
duke@0 264 }
duke@0 265
duke@0 266 if (!PENDING_EXCEPTION->
never@1142 267 is_a(SystemDictionary::LinkageError_klass())) {
duke@0 268 // Just throw the exception and don't prevent these classes from
duke@0 269 // being loaded due to virtual machine errors like StackOverflow
duke@0 270 // and OutOfMemoryError, etc, or if the thread was hit by stop()
duke@0 271 // Needs clarification to section 5.4.3 of the VM spec (see 6308271)
duke@0 272 }
duke@0 273 else if (!this_oop->tag_at(which).is_unresolved_klass_in_error()) {
duke@0 274 SystemDictionary::add_resolution_error(this_oop, which, error);
duke@0 275 this_oop->tag_at_put(which, JVM_CONSTANT_UnresolvedClassInError);
duke@0 276 } else {
duke@0 277 // some other thread has put the class in error state.
coleenp@2069 278 error = SystemDictionary::find_resolution_error(this_oop, which);
coleenp@2069 279 assert(error != NULL, "checking");
duke@0 280 throw_orig_error = true;
duke@0 281 }
duke@0 282 } // unlocked
duke@0 283
duke@0 284 if (throw_orig_error) {
duke@0 285 CLEAR_PENDING_EXCEPTION;
duke@0 286 ResourceMark rm;
duke@0 287 const char* className = this_oop->unresolved_klass_at(which)->as_C_string();
duke@0 288 THROW_MSG_0(error, className);
duke@0 289 }
duke@0 290
duke@0 291 return 0;
duke@0 292 }
duke@0 293
coleenp@3656 294 if (TraceClassResolution && !k()->oop_is_array()) {
duke@0 295 // skip resolving the constant pool so that this code get's
duke@0 296 // called the next time some bytecodes refer to this class.
duke@0 297 ResourceMark rm;
duke@0 298 int line_number = -1;
duke@0 299 const char * source_file = NULL;
duke@0 300 if (JavaThread::current()->has_last_Java_frame()) {
duke@0 301 // try to identify the method which called this function.
duke@0 302 vframeStream vfst(JavaThread::current());
duke@0 303 if (!vfst.at_end()) {
duke@0 304 line_number = vfst.method()->line_number_from_bci(vfst.bci());
coleenp@3880 305 Symbol* s = vfst.method()->method_holder()->source_file_name();
duke@0 306 if (s != NULL) {
duke@0 307 source_file = s->as_C_string();
duke@0 308 }
duke@0 309 }
duke@0 310 }
duke@0 311 if (k() != this_oop->pool_holder()) {
duke@0 312 // only print something if the classes are different
duke@0 313 if (source_file != NULL) {
duke@0 314 tty->print("RESOLVE %s %s %s:%d\n",
coleenp@3880 315 this_oop->pool_holder()->external_name(),
coleenp@3656 316 InstanceKlass::cast(k())->external_name(), source_file, line_number);
duke@0 317 } else {
duke@0 318 tty->print("RESOLVE %s %s\n",
coleenp@3880 319 this_oop->pool_holder()->external_name(),
coleenp@3656 320 InstanceKlass::cast(k())->external_name());
duke@0 321 }
duke@0 322 }
duke@0 323 return k();
duke@0 324 } else {
coleenp@3656 325 MonitorLockerEx ml(this_oop->lock());
duke@0 326 // Only updated constant pool - if it is resolved.
duke@0 327 do_resolve = this_oop->tag_at(which).is_unresolved_klass();
duke@0 328 if (do_resolve) {
coleenp@3880 329 ClassLoaderData* this_key = this_oop->pool_holder()->class_loader_data();
coleenp@3936 330 this_key->record_dependency(k(), CHECK_NULL); // Can throw OOM
duke@0 331 this_oop->klass_at_put(which, k());
duke@0 332 }
duke@0 333 }
duke@0 334 }
duke@0 335
duke@0 336 entry = this_oop->resolved_klass_at(which);
coleenp@3656 337 assert(entry.is_resolved() && entry.get_klass()->is_klass(), "must be resolved at this point");
coleenp@3656 338 return entry.get_klass();
duke@0 339 }
duke@0 340
duke@0 341
coleenp@3656 342 // Does not update ConstantPool* - to avoid any exception throwing. Used
duke@0 343 // by compiler and exception handling. Also used to avoid classloads for
duke@0 344 // instanceof operations. Returns NULL if the class has not been loaded or
duke@0 345 // if the verification of constant pool failed
coleenp@3656 346 Klass* ConstantPool::klass_at_if_loaded(constantPoolHandle this_oop, int which) {
coleenp@2069 347 CPSlot entry = this_oop->slot_at(which);
coleenp@3656 348 if (entry.is_resolved()) {
coleenp@3656 349 assert(entry.get_klass()->is_klass(), "must be");
coleenp@3656 350 return entry.get_klass();
duke@0 351 } else {
coleenp@3656 352 assert(entry.is_unresolved(), "must be either symbol or klass");
duke@0 353 Thread *thread = Thread::current();
coleenp@2069 354 Symbol* name = entry.get_symbol();
coleenp@3880 355 oop loader = this_oop->pool_holder()->class_loader();
coleenp@3880 356 oop protection_domain = this_oop->pool_holder()->protection_domain();
duke@0 357 Handle h_prot (thread, protection_domain);
duke@0 358 Handle h_loader (thread, loader);
coleenp@3656 359 Klass* k = SystemDictionary::find(name, h_loader, h_prot, thread);
duke@0 360
duke@0 361 if (k != NULL) {
duke@0 362 // Make sure that resolving is legal
duke@0 363 EXCEPTION_MARK;
duke@0 364 KlassHandle klass(THREAD, k);
duke@0 365 // return NULL if verification fails
duke@0 366 verify_constant_pool_resolve(this_oop, klass, THREAD);
duke@0 367 if (HAS_PENDING_EXCEPTION) {
duke@0 368 CLEAR_PENDING_EXCEPTION;
duke@0 369 return NULL;
duke@0 370 }
duke@0 371 return klass();
duke@0 372 } else {
duke@0 373 return k;
duke@0 374 }
duke@0 375 }
duke@0 376 }
duke@0 377
duke@0 378
coleenp@3656 379 Klass* ConstantPool::klass_ref_at_if_loaded(constantPoolHandle this_oop, int which) {
duke@0 380 return klass_at_if_loaded(this_oop, this_oop->klass_ref_index_at(which));
duke@0 381 }
duke@0 382
duke@0 383
duke@0 384 // This is an interface for the compiler that allows accessing non-resolved entries
duke@0 385 // in the constant pool - but still performs the validations tests. Must be used
duke@0 386 // in a pre-parse of the compiler - to determine what it can do and not do.
duke@0 387 // Note: We cannot update the ConstantPool from the vm_thread.
coleenp@3656 388 Klass* ConstantPool::klass_ref_at_if_loaded_check(constantPoolHandle this_oop, int index, TRAPS) {
duke@0 389 int which = this_oop->klass_ref_index_at(index);
coleenp@2069 390 CPSlot entry = this_oop->slot_at(which);
coleenp@3656 391 if (entry.is_resolved()) {
coleenp@3656 392 assert(entry.get_klass()->is_klass(), "must be");
coleenp@3656 393 return entry.get_klass();
duke@0 394 } else {
coleenp@3656 395 assert(entry.is_unresolved(), "must be either symbol or klass");
coleenp@2069 396 Symbol* name = entry.get_symbol();
coleenp@3880 397 oop loader = this_oop->pool_holder()->class_loader();
coleenp@3880 398 oop protection_domain = this_oop->pool_holder()->protection_domain();
duke@0 399 Handle h_loader(THREAD, loader);
duke@0 400 Handle h_prot (THREAD, protection_domain);
duke@0 401 KlassHandle k(THREAD, SystemDictionary::find(name, h_loader, h_prot, THREAD));
duke@0 402
duke@0 403 // Do access check for klasses
duke@0 404 if( k.not_null() ) verify_constant_pool_resolve(this_oop, k, CHECK_NULL);
duke@0 405 return k();
duke@0 406 }
duke@0 407 }
duke@0 408
duke@0 409
coleenp@3656 410 Method* ConstantPool::method_at_if_loaded(constantPoolHandle cpool,
twisti@3582 411 int which) {
brutisso@3067 412 if (cpool->cache() == NULL) return NULL; // nothing to load yet
coleenp@3656 413 int cache_index = decode_cpcache_index(which, true);
jrose@2557 414 if (!(cache_index >= 0 && cache_index < cpool->cache()->length())) {
coleenp@3656 415 // FIXME: should be an assert
jrose@2557 416 if (PrintMiscellaneous && (Verbose||WizardMode)) {
twisti@3582 417 tty->print_cr("bad operand %d in:", which); cpool->print();
jrose@2557 418 }
jrose@2557 419 return NULL;
jrose@2557 420 }
jrose@2557 421 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
twisti@3582 422 return e->method_if_resolved(cpool);
twisti@3582 423 }
twisti@3582 424
twisti@3582 425
coleenp@3656 426 bool ConstantPool::has_appendix_at_if_loaded(constantPoolHandle cpool, int which) {
twisti@3582 427 if (cpool->cache() == NULL) return false; // nothing to load yet
coleenp@3656 428 int cache_index = decode_cpcache_index(which, true);
coleenp@3656 429 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
twisti@3582 430 return e->has_appendix();
twisti@3582 431 }
twisti@3582 432
coleenp@3656 433 oop ConstantPool::appendix_at_if_loaded(constantPoolHandle cpool, int which) {
twisti@3582 434 if (cpool->cache() == NULL) return NULL; // nothing to load yet
coleenp@3656 435 int cache_index = decode_cpcache_index(which, true);
coleenp@3656 436 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
coleenp@3656 437 return e->appendix_if_resolved(cpool);
jrose@2557 438 }
jrose@2557 439
jrose@2557 440
twisti@3753 441 bool ConstantPool::has_method_type_at_if_loaded(constantPoolHandle cpool, int which) {
twisti@3753 442 if (cpool->cache() == NULL) return false; // nothing to load yet
twisti@3753 443 int cache_index = decode_cpcache_index(which, true);
twisti@3753 444 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
twisti@3753 445 return e->has_method_type();
twisti@3753 446 }
twisti@3753 447
twisti@3753 448 oop ConstantPool::method_type_at_if_loaded(constantPoolHandle cpool, int which) {
twisti@3753 449 if (cpool->cache() == NULL) return NULL; // nothing to load yet
twisti@3753 450 int cache_index = decode_cpcache_index(which, true);
twisti@3753 451 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
twisti@3753 452 return e->method_type_if_resolved(cpool);
twisti@3753 453 }
twisti@3753 454
twisti@3753 455
coleenp@3656 456 Symbol* ConstantPool::impl_name_ref_at(int which, bool uncached) {
jrose@726 457 int name_index = name_ref_index_at(impl_name_and_type_ref_index_at(which, uncached));
duke@0 458 return symbol_at(name_index);
duke@0 459 }
duke@0 460
duke@0 461
coleenp@3656 462 Symbol* ConstantPool::impl_signature_ref_at(int which, bool uncached) {
jrose@726 463 int signature_index = signature_ref_index_at(impl_name_and_type_ref_index_at(which, uncached));
duke@0 464 return symbol_at(signature_index);
duke@0 465 }
duke@0 466
duke@0 467
coleenp@3656 468 int ConstantPool::impl_name_and_type_ref_index_at(int which, bool uncached) {
jrose@1059 469 int i = which;
jrose@1059 470 if (!uncached && cache() != NULL) {
coleenp@3656 471 if (ConstantPool::is_invokedynamic_index(which)) {
coleenp@3656 472 // Invokedynamic index is index into resolved_references
coleenp@3656 473 int pool_index = invokedynamic_cp_cache_entry_at(which)->constant_pool_index();
jrose@2316 474 pool_index = invoke_dynamic_name_and_type_ref_index_at(pool_index);
jrose@1583 475 assert(tag_at(pool_index).is_name_and_type(), "");
jrose@1583 476 return pool_index;
jrose@1583 477 }
jrose@1059 478 // change byte-ordering and go via cache
jrose@1059 479 i = remap_instruction_operand_from_cache(which);
jrose@1059 480 } else {
jrose@1838 481 if (tag_at(which).is_invoke_dynamic()) {
jrose@1838 482 int pool_index = invoke_dynamic_name_and_type_ref_index_at(which);
jrose@1838 483 assert(tag_at(pool_index).is_name_and_type(), "");
jrose@1838 484 return pool_index;
jrose@1838 485 }
jrose@1059 486 }
jrose@1059 487 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool");
jrose@1838 488 assert(!tag_at(i).is_invoke_dynamic(), "Must be handled above");
jrose@1059 489 jint ref_index = *int_at_addr(i);
duke@0 490 return extract_high_short_from_int(ref_index);
duke@0 491 }
duke@0 492
duke@0 493
coleenp@3656 494 int ConstantPool::impl_klass_ref_index_at(int which, bool uncached) {
coleenp@3656 495 guarantee(!ConstantPool::is_invokedynamic_index(which),
jrose@1059 496 "an invokedynamic instruction does not have a klass");
jrose@1059 497 int i = which;
jrose@1059 498 if (!uncached && cache() != NULL) {
jrose@1059 499 // change byte-ordering and go via cache
jrose@1059 500 i = remap_instruction_operand_from_cache(which);
jrose@1059 501 }
jrose@1059 502 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool");
jrose@1059 503 jint ref_index = *int_at_addr(i);
duke@0 504 return extract_low_short_from_int(ref_index);
duke@0 505 }
duke@0 506
duke@0 507
jrose@726 508
coleenp@3656 509 int ConstantPool::remap_instruction_operand_from_cache(int operand) {
jrose@1486 510 int cpc_index = operand;
jrose@1486 511 DEBUG_ONLY(cpc_index -= CPCACHE_INDEX_TAG);
jrose@1486 512 assert((int)(u2)cpc_index == cpc_index, "clean u2");
jrose@1059 513 int member_index = cache()->entry_at(cpc_index)->constant_pool_index();
jrose@1059 514 return member_index;
jrose@726 515 }
jrose@726 516
jrose@726 517
coleenp@3656 518 void ConstantPool::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) {
duke@0 519 if (k->oop_is_instance() || k->oop_is_objArray()) {
duke@0 520 instanceKlassHandle holder (THREAD, this_oop->pool_holder());
coleenp@3764 521 Klass* elem_oop = k->oop_is_instance() ? k() : ObjArrayKlass::cast(k())->bottom_klass();
duke@0 522 KlassHandle element (THREAD, elem_oop);
duke@0 523
duke@0 524 // The element type could be a typeArray - we only need the access check if it is
duke@0 525 // an reference to another class
duke@0 526 if (element->oop_is_instance()) {
duke@0 527 LinkResolver::check_klass_accessability(holder, element, CHECK);
duke@0 528 }
duke@0 529 }
duke@0 530 }
duke@0 531
duke@0 532
coleenp@3656 533 int ConstantPool::name_ref_index_at(int which_nt) {
jrose@726 534 jint ref_index = name_and_type_at(which_nt);
duke@0 535 return extract_low_short_from_int(ref_index);
duke@0 536 }
duke@0 537
duke@0 538
coleenp@3656 539 int ConstantPool::signature_ref_index_at(int which_nt) {
jrose@726 540 jint ref_index = name_and_type_at(which_nt);
duke@0 541 return extract_high_short_from_int(ref_index);
duke@0 542 }
duke@0 543
duke@0 544
coleenp@3656 545 Klass* ConstantPool::klass_ref_at(int which, TRAPS) {
duke@0 546 return klass_at(klass_ref_index_at(which), CHECK_NULL);
duke@0 547 }
duke@0 548
duke@0 549
coleenp@3656 550 Symbol* ConstantPool::klass_name_at(int which) {
duke@0 551 assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(),
duke@0 552 "Corrupted constant pool");
coleenp@3656 553 // A resolved constantPool entry will contain a Klass*, otherwise a Symbol*.
duke@0 554 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and
duke@0 555 // tag is not updated atomicly.
coleenp@2069 556 CPSlot entry = slot_at(which);
coleenp@3656 557 if (entry.is_resolved()) {
duke@0 558 // Already resolved - return entry's name.
coleenp@3656 559 assert(entry.get_klass()->is_klass(), "must be");
coleenp@3656 560 return entry.get_klass()->name();
duke@0 561 } else {
coleenp@3656 562 assert(entry.is_unresolved(), "must be either symbol or klass");
coleenp@2069 563 return entry.get_symbol();
duke@0 564 }
duke@0 565 }
duke@0 566
coleenp@3656 567 Symbol* ConstantPool::klass_ref_at_noresolve(int which) {
duke@0 568 jint ref_index = klass_ref_index_at(which);
duke@0 569 return klass_at_noresolve(ref_index);
duke@0 570 }
duke@0 571
coleenp@3656 572 Symbol* ConstantPool::uncached_klass_ref_at_noresolve(int which) {
jrose@1524 573 jint ref_index = uncached_klass_ref_index_at(which);
jrose@1524 574 return klass_at_noresolve(ref_index);
jrose@1524 575 }
jrose@1524 576
coleenp@3656 577 char* ConstantPool::string_at_noresolve(int which) {
coleenp@3656 578 Symbol* s = unresolved_string_at(which);
coleenp@3656 579 if (s == NULL) {
coleenp@3656 580 return (char*)"<pseudo-string>";
duke@0 581 } else {
coleenp@3656 582 return unresolved_string_at(which)->as_C_string();
duke@0 583 }
duke@0 584 }
duke@0 585
coleenp@3656 586 BasicType ConstantPool::basic_type_for_signature_at(int which) {
duke@0 587 return FieldType::basic_type(symbol_at(which));
duke@0 588 }
duke@0 589
duke@0 590
coleenp@3656 591 void ConstantPool::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) {
duke@0 592 for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused
coleenp@3656 593 if (this_oop->tag_at(index).is_string()) {
duke@0 594 this_oop->string_at(index, CHECK);
duke@0 595 }
duke@0 596 }
duke@0 597 }
duke@0 598
coleenp@3656 599 // Resolve all the classes in the constant pool. If they are all resolved,
coleenp@3656 600 // the constant pool is read-only. Enhancement: allocate cp entries to
coleenp@3656 601 // another metaspace, and copy to read-only or read-write space if this
coleenp@3656 602 // bit is set.
coleenp@3656 603 bool ConstantPool::resolve_class_constants(TRAPS) {
coleenp@3656 604 constantPoolHandle cp(THREAD, this);
coleenp@3656 605 for (int index = 1; index < length(); index++) { // Index 0 is unused
coleenp@3656 606 if (tag_at(index).is_unresolved_klass() &&
coleenp@3656 607 klass_at_if_loaded(cp, index) == NULL) {
coleenp@3656 608 return false;
jrose@1838 609 }
coleenp@3656 610 }
coleenp@3656 611 // set_preresolution(); or some bit for future use
coleenp@3656 612 return true;
jrose@1838 613 }
jrose@1838 614
coleenp@3656 615 // If resolution for MethodHandle or MethodType fails, save the exception
coleenp@3656 616 // in the resolution error table, so that the same exception is thrown again.
coleenp@3656 617 void ConstantPool::save_and_throw_exception(constantPoolHandle this_oop, int which,
coleenp@3656 618 int tag, TRAPS) {
coleenp@3656 619 ResourceMark rm;
coleenp@3656 620 Symbol* error = PENDING_EXCEPTION->klass()->name();
coleenp@3656 621 MonitorLockerEx ml(this_oop->lock()); // lock cpool to change tag.
coleenp@3656 622
coleenp@3656 623 int error_tag = (tag == JVM_CONSTANT_MethodHandle) ?
coleenp@3656 624 JVM_CONSTANT_MethodHandleInError : JVM_CONSTANT_MethodTypeInError;
coleenp@3656 625
coleenp@3656 626 if (!PENDING_EXCEPTION->
coleenp@3656 627 is_a(SystemDictionary::LinkageError_klass())) {
coleenp@3656 628 // Just throw the exception and don't prevent these classes from
coleenp@3656 629 // being loaded due to virtual machine errors like StackOverflow
coleenp@3656 630 // and OutOfMemoryError, etc, or if the thread was hit by stop()
coleenp@3656 631 // Needs clarification to section 5.4.3 of the VM spec (see 6308271)
coleenp@3656 632
coleenp@3656 633 } else if (this_oop->tag_at(which).value() != error_tag) {
coleenp@3656 634 SystemDictionary::add_resolution_error(this_oop, which, error);
coleenp@3656 635 this_oop->tag_at_put(which, error_tag);
coleenp@3656 636 } else {
coleenp@3656 637 // some other thread has put the class in error state.
coleenp@3656 638 error = SystemDictionary::find_resolution_error(this_oop, which);
coleenp@3656 639 assert(error != NULL, "checking");
coleenp@3656 640 CLEAR_PENDING_EXCEPTION;
coleenp@3656 641 THROW_MSG(error, "");
coleenp@3656 642 }
coleenp@3656 643 }
coleenp@3656 644
coleenp@3656 645
coleenp@3656 646 // Called to resolve constants in the constant pool and return an oop.
coleenp@3656 647 // Some constant pool entries cache their resolved oop. This is also
coleenp@3656 648 // called to create oops from constants to use in arguments for invokedynamic
coleenp@3656 649 oop ConstantPool::resolve_constant_at_impl(constantPoolHandle this_oop, int index, int cache_index, TRAPS) {
jrose@1524 650 oop result_oop = NULL;
jrose@1838 651 Handle throw_exception;
jrose@1838 652
jrose@1838 653 if (cache_index == _possible_index_sentinel) {
coleenp@3656 654 // It is possible that this constant is one which is cached in the objects.
jrose@1838 655 // We'll do a linear search. This should be OK because this usage is rare.
jrose@1838 656 assert(index > 0, "valid index");
coleenp@3656 657 cache_index = this_oop->cp_to_object_index(index);
jrose@1838 658 }
jrose@1838 659 assert(cache_index == _no_index_sentinel || cache_index >= 0, "");
jrose@1838 660 assert(index == _no_index_sentinel || index >= 0, "");
jrose@1838 661
jrose@1524 662 if (cache_index >= 0) {
coleenp@3656 663 result_oop = this_oop->resolved_references()->obj_at(cache_index);
jrose@1524 664 if (result_oop != NULL) {
coleenp@3656 665 return result_oop;
jrose@1838 666 // That was easy...
jrose@1524 667 }
coleenp@3656 668 index = this_oop->object_to_cp_index(cache_index);
jrose@1524 669 }
jrose@1524 670
jrose@1838 671 jvalue prim_value; // temp used only in a few cases below
jrose@1838 672
jrose@1524 673 int tag_value = this_oop->tag_at(index).value();
coleenp@3656 674
jrose@1524 675 switch (tag_value) {
jrose@1524 676
jrose@1524 677 case JVM_CONSTANT_UnresolvedClass:
jrose@1524 678 case JVM_CONSTANT_UnresolvedClassInError:
jrose@1524 679 case JVM_CONSTANT_Class:
jrose@1524 680 {
coleenp@3656 681 assert(cache_index == _no_index_sentinel, "should not have been set");
coleenp@3656 682 Klass* resolved = klass_at_impl(this_oop, index, CHECK_NULL);
jrose@1524 683 // ldc wants the java mirror.
never@2231 684 result_oop = resolved->java_mirror();
jrose@1524 685 break;
jrose@1524 686 }
jrose@1524 687
jrose@1524 688 case JVM_CONSTANT_String:
coleenp@3656 689 assert(cache_index != _no_index_sentinel, "should have been set");
jrose@1524 690 if (this_oop->is_pseudo_string_at(index)) {
coleenp@3656 691 result_oop = this_oop->pseudo_string_at(index, cache_index);
jrose@1524 692 break;
jrose@1524 693 }
coleenp@3656 694 result_oop = string_at_impl(this_oop, index, cache_index, CHECK_NULL);
jrose@1524 695 break;
jrose@1524 696
jrose@1524 697 case JVM_CONSTANT_Object:
jrose@1524 698 result_oop = this_oop->object_at(index);
jrose@1524 699 break;
jrose@1524 700
coleenp@3656 701 case JVM_CONSTANT_MethodHandleInError:
coleenp@3656 702 case JVM_CONSTANT_MethodTypeInError:
coleenp@3656 703 {
coleenp@3656 704 Symbol* error = SystemDictionary::find_resolution_error(this_oop, index);
coleenp@3656 705 guarantee(error != (Symbol*)NULL, "tag mismatch with resolution error table");
coleenp@3656 706 ResourceMark rm;
coleenp@3656 707 THROW_MSG_0(error, "");
coleenp@3656 708 break;
coleenp@3656 709 }
coleenp@3656 710
jrose@1524 711 case JVM_CONSTANT_MethodHandle:
jrose@1524 712 {
jrose@1524 713 int ref_kind = this_oop->method_handle_ref_kind_at(index);
jrose@1524 714 int callee_index = this_oop->method_handle_klass_index_at(index);
coleenp@2069 715 Symbol* name = this_oop->method_handle_name_ref_at(index);
coleenp@2069 716 Symbol* signature = this_oop->method_handle_signature_ref_at(index);
jrose@1524 717 if (PrintMiscellaneous)
jrose@1524 718 tty->print_cr("resolve JVM_CONSTANT_MethodHandle:%d [%d/%d/%d] %s.%s",
jrose@1524 719 ref_kind, index, this_oop->method_handle_index_at(index),
jrose@1524 720 callee_index, name->as_C_string(), signature->as_C_string());
jrose@1524 721 KlassHandle callee;
coleenp@3656 722 { Klass* k = klass_at_impl(this_oop, callee_index, CHECK_NULL);
jrose@1524 723 callee = KlassHandle(THREAD, k);
jrose@1524 724 }
jrose@1524 725 KlassHandle klass(THREAD, this_oop->pool_holder());
jrose@1524 726 Handle value = SystemDictionary::link_method_handle_constant(klass, ref_kind,
jrose@1524 727 callee, name, signature,
jrose@1838 728 THREAD);
coleenp@3656 729 result_oop = value();
jrose@1838 730 if (HAS_PENDING_EXCEPTION) {
coleenp@3656 731 save_and_throw_exception(this_oop, index, tag_value, CHECK_NULL);
jrose@1838 732 }
jrose@1524 733 break;
jrose@1524 734 }
jrose@1524 735
jrose@1524 736 case JVM_CONSTANT_MethodType:
jrose@1524 737 {
coleenp@2069 738 Symbol* signature = this_oop->method_type_signature_at(index);
jrose@1524 739 if (PrintMiscellaneous)
jrose@1524 740 tty->print_cr("resolve JVM_CONSTANT_MethodType [%d/%d] %s",
jrose@1524 741 index, this_oop->method_type_index_at(index),
jrose@1524 742 signature->as_C_string());
jrose@1524 743 KlassHandle klass(THREAD, this_oop->pool_holder());
twisti@3582 744 Handle value = SystemDictionary::find_method_handle_type(signature, klass, THREAD);
coleenp@3656 745 result_oop = value();
jrose@1838 746 if (HAS_PENDING_EXCEPTION) {
coleenp@3656 747 save_and_throw_exception(this_oop, index, tag_value, CHECK_NULL);
jrose@1838 748 }
jrose@1524 749 break;
jrose@1524 750 }
jrose@1524 751
jrose@1524 752 case JVM_CONSTANT_Integer:
coleenp@3656 753 assert(cache_index == _no_index_sentinel, "should not have been set");
jrose@1838 754 prim_value.i = this_oop->int_at(index);
jrose@1838 755 result_oop = java_lang_boxing_object::create(T_INT, &prim_value, CHECK_NULL);
jrose@1838 756 break;
jrose@1838 757
jrose@1524 758 case JVM_CONSTANT_Float:
coleenp@3656 759 assert(cache_index == _no_index_sentinel, "should not have been set");
jrose@1838 760 prim_value.f = this_oop->float_at(index);
jrose@1838 761 result_oop = java_lang_boxing_object::create(T_FLOAT, &prim_value, CHECK_NULL);
jrose@1838 762 break;
jrose@1838 763
jrose@1524 764 case JVM_CONSTANT_Long:
coleenp@3656 765 assert(cache_index == _no_index_sentinel, "should not have been set");
jrose@1838 766 prim_value.j = this_oop->long_at(index);
jrose@1838 767 result_oop = java_lang_boxing_object::create(T_LONG, &prim_value, CHECK_NULL);
jrose@1838 768 break;
jrose@1838 769
jrose@1524 770 case JVM_CONSTANT_Double:
coleenp@3656 771 assert(cache_index == _no_index_sentinel, "should not have been set");
jrose@1838 772 prim_value.d = this_oop->double_at(index);
jrose@1838 773 result_oop = java_lang_boxing_object::create(T_DOUBLE, &prim_value, CHECK_NULL);
jrose@1524 774 break;
jrose@1524 775
jrose@1524 776 default:
jrose@1524 777 DEBUG_ONLY( tty->print_cr("*** %p: tag at CP[%d/%d] = %d",
jrose@1524 778 this_oop(), index, cache_index, tag_value) );
jrose@1524 779 assert(false, "unexpected constant tag");
jrose@1524 780 break;
jrose@1524 781 }
jrose@1524 782
jrose@1524 783 if (cache_index >= 0) {
jrose@1524 784 // Cache the oop here also.
jrose@1838 785 Handle result_handle(THREAD, result_oop);
coleenp@3656 786 MonitorLockerEx ml(this_oop->lock()); // don't know if we really need this
coleenp@3656 787 oop result = this_oop->resolved_references()->obj_at(cache_index);
coleenp@3656 788 // Benign race condition: resolved_references may already be filled in while we were trying to lock.
jrose@1838 789 // The important thing here is that all threads pick up the same result.
jrose@1838 790 // It doesn't matter which racing thread wins, as long as only one
jrose@1838 791 // result is used by all threads, and all future queries.
jrose@1838 792 // That result may be either a resolved constant or a failure exception.
coleenp@3656 793 if (result == NULL) {
coleenp@3656 794 this_oop->resolved_references()->obj_at_put(cache_index, result_handle());
coleenp@3656 795 return result_handle();
coleenp@3656 796 } else {
coleenp@3656 797 // Return the winning thread's result. This can be different than
coleenp@3656 798 // result_handle() for MethodHandles.
coleenp@3656 799 return result;
jrose@1524 800 }
jrose@1524 801 } else {
jrose@1524 802 return result_oop;
jrose@1524 803 }
jrose@1524 804 }
jrose@1524 805
coleenp@3656 806 oop ConstantPool::uncached_string_at(int which, TRAPS) {
coleenp@3656 807 Symbol* sym = unresolved_string_at(which);
coleenp@3656 808 oop str = StringTable::intern(sym, CHECK_(NULL));
coleenp@3656 809 assert(java_lang_String::is_instance(str), "must be string");
coleenp@3656 810 return str;
coleenp@3656 811 }
twisti@3582 812
coleenp@3656 813
coleenp@3656 814 oop ConstantPool::resolve_bootstrap_specifier_at_impl(constantPoolHandle this_oop, int index, TRAPS) {
twisti@3582 815 assert(this_oop->tag_at(index).is_invoke_dynamic(), "Corrupted constant pool");
twisti@3582 816
twisti@3582 817 Handle bsm;
twisti@3582 818 int argc;
twisti@3582 819 {
twisti@3582 820 // JVM_CONSTANT_InvokeDynamic is an ordered pair of [bootm, name&type], plus optional arguments
twisti@3582 821 // The bootm, being a JVM_CONSTANT_MethodHandle, has its own cache entry.
twisti@3582 822 // It is accompanied by the optional arguments.
twisti@3582 823 int bsm_index = this_oop->invoke_dynamic_bootstrap_method_ref_index_at(index);
twisti@3582 824 oop bsm_oop = this_oop->resolve_possibly_cached_constant_at(bsm_index, CHECK_NULL);
twisti@3582 825 if (!java_lang_invoke_MethodHandle::is_instance(bsm_oop)) {
twisti@3582 826 THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "BSM not an MethodHandle");
twisti@3582 827 }
twisti@3582 828
twisti@3582 829 // Extract the optional static arguments.
twisti@3582 830 argc = this_oop->invoke_dynamic_argument_count_at(index);
twisti@3582 831 if (argc == 0) return bsm_oop;
twisti@3582 832
twisti@3582 833 bsm = Handle(THREAD, bsm_oop);
twisti@3582 834 }
twisti@3582 835
twisti@3582 836 objArrayHandle info;
twisti@3582 837 {
twisti@3582 838 objArrayOop info_oop = oopFactory::new_objArray(SystemDictionary::Object_klass(), 1+argc, CHECK_NULL);
twisti@3582 839 info = objArrayHandle(THREAD, info_oop);
twisti@3582 840 }
twisti@3582 841
twisti@3582 842 info->obj_at_put(0, bsm());
twisti@3582 843 for (int i = 0; i < argc; i++) {
twisti@3582 844 int arg_index = this_oop->invoke_dynamic_argument_index_at(index, i);
twisti@3582 845 oop arg_oop = this_oop->resolve_possibly_cached_constant_at(arg_index, CHECK_NULL);
twisti@3582 846 info->obj_at_put(1+i, arg_oop);
twisti@3582 847 }
twisti@3582 848
twisti@3582 849 return info();
twisti@3582 850 }
twisti@3582 851
coleenp@3656 852 oop ConstantPool::string_at_impl(constantPoolHandle this_oop, int which, int obj_index, TRAPS) {
coleenp@3656 853 // If the string has already been interned, this entry will be non-null
coleenp@3656 854 oop str = this_oop->resolved_references()->obj_at(obj_index);
coleenp@3656 855 if (str != NULL) return str;
coleenp@3656 856
coleenp@2069 857 Symbol* sym = this_oop->unresolved_string_at(which);
coleenp@3656 858 str = StringTable::intern(sym, CHECK_(NULL));
coleenp@3656 859 this_oop->string_at_put(which, obj_index, str);
coleenp@2069 860 assert(java_lang_String::is_instance(str), "must be string");
coleenp@2069 861 return str;
duke@0 862 }
duke@0 863
duke@0 864
coleenp@3656 865 bool ConstantPool::klass_name_at_matches(instanceKlassHandle k,
duke@0 866 int which) {
coleenp@2069 867 // Names are interned, so we can compare Symbol*s directly
coleenp@2069 868 Symbol* cp_name = klass_name_at(which);
duke@0 869 return (cp_name == k->name());
duke@0 870 }
duke@0 871
duke@0 872
coleenp@2069 873 // Iterate over symbols and decrement ones which are Symbol*s.
coleenp@2069 874 // This is done during GC so do not need to lock constantPool unless we
coleenp@2069 875 // have per-thread safepoints.
coleenp@2069 876 // Only decrement the UTF8 symbols. Unresolved classes and strings point to
coleenp@2069 877 // these symbols but didn't increment the reference count.
coleenp@3656 878 void ConstantPool::unreference_symbols() {
coleenp@2069 879 for (int index = 1; index < length(); index++) { // Index 0 is unused
coleenp@2069 880 constantTag tag = tag_at(index);
coleenp@2069 881 if (tag.is_symbol()) {
coleenp@2069 882 symbol_at(index)->decrement_refcount();
coleenp@2069 883 }
coleenp@2069 884 }
coleenp@2069 885 }
duke@0 886
duke@0 887
duke@0 888 // Compare this constant pool's entry at index1 to the constant pool
duke@0 889 // cp2's entry at index2.
coleenp@3656 890 bool ConstantPool::compare_entry_to(int index1, constantPoolHandle cp2,
duke@0 891 int index2, TRAPS) {
duke@0 892
duke@0 893 jbyte t1 = tag_at(index1).value();
duke@0 894 jbyte t2 = cp2->tag_at(index2).value();
duke@0 895
duke@0 896
duke@0 897 // JVM_CONSTANT_UnresolvedClassInError is equal to JVM_CONSTANT_UnresolvedClass
duke@0 898 // when comparing
duke@0 899 if (t1 == JVM_CONSTANT_UnresolvedClassInError) {
duke@0 900 t1 = JVM_CONSTANT_UnresolvedClass;
duke@0 901 }
duke@0 902 if (t2 == JVM_CONSTANT_UnresolvedClassInError) {
duke@0 903 t2 = JVM_CONSTANT_UnresolvedClass;
duke@0 904 }
duke@0 905
duke@0 906 if (t1 != t2) {
duke@0 907 // Not the same entry type so there is nothing else to check. Note
duke@0 908 // that this style of checking will consider resolved/unresolved
coleenp@3656 909 // class pairs as different.
coleenp@3656 910 // From the ConstantPool* API point of view, this is correct
coleenp@3656 911 // behavior. See VM_RedefineClasses::merge_constant_pools() to see how this
coleenp@3656 912 // plays out in the context of ConstantPool* merging.
duke@0 913 return false;
duke@0 914 }
duke@0 915
duke@0 916 switch (t1) {
duke@0 917 case JVM_CONSTANT_Class:
duke@0 918 {
coleenp@3656 919 Klass* k1 = klass_at(index1, CHECK_false);
coleenp@3656 920 Klass* k2 = cp2->klass_at(index2, CHECK_false);
duke@0 921 if (k1 == k2) {
duke@0 922 return true;
duke@0 923 }
duke@0 924 } break;
duke@0 925
duke@0 926 case JVM_CONSTANT_ClassIndex:
duke@0 927 {
duke@0 928 int recur1 = klass_index_at(index1);
duke@0 929 int recur2 = cp2->klass_index_at(index2);
duke@0 930 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 931 if (match) {
duke@0 932 return true;
duke@0 933 }
duke@0 934 } break;
duke@0 935
duke@0 936 case JVM_CONSTANT_Double:
duke@0 937 {
duke@0 938 jdouble d1 = double_at(index1);
duke@0 939 jdouble d2 = cp2->double_at(index2);
duke@0 940 if (d1 == d2) {
duke@0 941 return true;
duke@0 942 }
duke@0 943 } break;
duke@0 944
duke@0 945 case JVM_CONSTANT_Fieldref:
duke@0 946 case JVM_CONSTANT_InterfaceMethodref:
duke@0 947 case JVM_CONSTANT_Methodref:
duke@0 948 {
duke@0 949 int recur1 = uncached_klass_ref_index_at(index1);
duke@0 950 int recur2 = cp2->uncached_klass_ref_index_at(index2);
duke@0 951 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 952 if (match) {
duke@0 953 recur1 = uncached_name_and_type_ref_index_at(index1);
duke@0 954 recur2 = cp2->uncached_name_and_type_ref_index_at(index2);
duke@0 955 match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 956 if (match) {
duke@0 957 return true;
duke@0 958 }
duke@0 959 }
duke@0 960 } break;
duke@0 961
duke@0 962 case JVM_CONSTANT_Float:
duke@0 963 {
duke@0 964 jfloat f1 = float_at(index1);
duke@0 965 jfloat f2 = cp2->float_at(index2);
duke@0 966 if (f1 == f2) {
duke@0 967 return true;
duke@0 968 }
duke@0 969 } break;
duke@0 970
duke@0 971 case JVM_CONSTANT_Integer:
duke@0 972 {
duke@0 973 jint i1 = int_at(index1);
duke@0 974 jint i2 = cp2->int_at(index2);
duke@0 975 if (i1 == i2) {
duke@0 976 return true;
duke@0 977 }
duke@0 978 } break;
duke@0 979
duke@0 980 case JVM_CONSTANT_Long:
duke@0 981 {
duke@0 982 jlong l1 = long_at(index1);
duke@0 983 jlong l2 = cp2->long_at(index2);
duke@0 984 if (l1 == l2) {
duke@0 985 return true;
duke@0 986 }
duke@0 987 } break;
duke@0 988
duke@0 989 case JVM_CONSTANT_NameAndType:
duke@0 990 {
duke@0 991 int recur1 = name_ref_index_at(index1);
duke@0 992 int recur2 = cp2->name_ref_index_at(index2);
duke@0 993 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 994 if (match) {
duke@0 995 recur1 = signature_ref_index_at(index1);
duke@0 996 recur2 = cp2->signature_ref_index_at(index2);
duke@0 997 match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 998 if (match) {
duke@0 999 return true;
duke@0 1000 }
duke@0 1001 }
duke@0 1002 } break;
duke@0 1003
duke@0 1004 case JVM_CONSTANT_StringIndex:
duke@0 1005 {
duke@0 1006 int recur1 = string_index_at(index1);
duke@0 1007 int recur2 = cp2->string_index_at(index2);
duke@0 1008 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 1009 if (match) {
duke@0 1010 return true;
duke@0 1011 }
duke@0 1012 } break;
duke@0 1013
duke@0 1014 case JVM_CONSTANT_UnresolvedClass:
duke@0 1015 {
coleenp@2069 1016 Symbol* k1 = unresolved_klass_at(index1);
coleenp@2069 1017 Symbol* k2 = cp2->unresolved_klass_at(index2);
duke@0 1018 if (k1 == k2) {
duke@0 1019 return true;
duke@0 1020 }
duke@0 1021 } break;
duke@0 1022
jrose@1524 1023 case JVM_CONSTANT_MethodType:
jrose@1524 1024 {
jrose@1524 1025 int k1 = method_type_index_at(index1);
jrose@1524 1026 int k2 = cp2->method_type_index_at(index2);
jrose@1924 1027 bool match = compare_entry_to(k1, cp2, k2, CHECK_false);
jrose@1924 1028 if (match) {
jrose@1524 1029 return true;
jrose@1524 1030 }
jrose@1524 1031 } break;
jrose@1524 1032
jrose@1524 1033 case JVM_CONSTANT_MethodHandle:
jrose@1524 1034 {
jrose@1524 1035 int k1 = method_handle_ref_kind_at(index1);
jrose@1524 1036 int k2 = cp2->method_handle_ref_kind_at(index2);
jrose@1524 1037 if (k1 == k2) {
jrose@1524 1038 int i1 = method_handle_index_at(index1);
jrose@1524 1039 int i2 = cp2->method_handle_index_at(index2);
jrose@1924 1040 bool match = compare_entry_to(i1, cp2, i2, CHECK_false);
jrose@1924 1041 if (match) {
jrose@1524 1042 return true;
jrose@1524 1043 }
jrose@1524 1044 }
jrose@1524 1045 } break;
jrose@1524 1046
jrose@1583 1047 case JVM_CONSTANT_InvokeDynamic:
jrose@1583 1048 {
jrose@1924 1049 int k1 = invoke_dynamic_bootstrap_method_ref_index_at(index1);
jrose@1924 1050 int k2 = cp2->invoke_dynamic_bootstrap_method_ref_index_at(index2);
jrose@1924 1051 bool match = compare_entry_to(k1, cp2, k2, CHECK_false);
jrose@1924 1052 if (!match) return false;
jrose@1924 1053 k1 = invoke_dynamic_name_and_type_ref_index_at(index1);
jrose@1924 1054 k2 = cp2->invoke_dynamic_name_and_type_ref_index_at(index2);
jrose@1924 1055 match = compare_entry_to(k1, cp2, k2, CHECK_false);
jrose@1924 1056 if (!match) return false;
jrose@1924 1057 int argc = invoke_dynamic_argument_count_at(index1);
jrose@1924 1058 if (argc == cp2->invoke_dynamic_argument_count_at(index2)) {
jrose@1924 1059 for (int j = 0; j < argc; j++) {
jrose@1924 1060 k1 = invoke_dynamic_argument_index_at(index1, j);
jrose@1924 1061 k2 = cp2->invoke_dynamic_argument_index_at(index2, j);
jrose@1924 1062 match = compare_entry_to(k1, cp2, k2, CHECK_false);
jrose@1924 1063 if (!match) return false;
jrose@1838 1064 }
jrose@1924 1065 return true; // got through loop; all elements equal
jrose@1583 1066 }
jrose@1583 1067 } break;
jrose@1583 1068
coleenp@3656 1069 case JVM_CONSTANT_String:
duke@0 1070 {
coleenp@2069 1071 Symbol* s1 = unresolved_string_at(index1);
coleenp@2069 1072 Symbol* s2 = cp2->unresolved_string_at(index2);
duke@0 1073 if (s1 == s2) {
duke@0 1074 return true;
duke@0 1075 }
duke@0 1076 } break;
duke@0 1077
duke@0 1078 case JVM_CONSTANT_Utf8:
duke@0 1079 {
coleenp@2069 1080 Symbol* s1 = symbol_at(index1);
coleenp@2069 1081 Symbol* s2 = cp2->symbol_at(index2);
duke@0 1082 if (s1 == s2) {
duke@0 1083 return true;
duke@0 1084 }
duke@0 1085 } break;
duke@0 1086
duke@0 1087 // Invalid is used as the tag for the second constant pool entry
duke@0 1088 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should
duke@0 1089 // not be seen by itself.
duke@0 1090 case JVM_CONSTANT_Invalid: // fall through
duke@0 1091
duke@0 1092 default:
duke@0 1093 ShouldNotReachHere();
duke@0 1094 break;
duke@0 1095 }
duke@0 1096
duke@0 1097 return false;
duke@0 1098 } // end compare_entry_to()
duke@0 1099
duke@0 1100
duke@0 1101 // Copy this constant pool's entries at start_i to end_i (inclusive)
duke@0 1102 // to the constant pool to_cp's entries starting at to_i. A total of
duke@0 1103 // (end_i - start_i) + 1 entries are copied.
coleenp@3656 1104 void ConstantPool::copy_cp_to_impl(constantPoolHandle from_cp, int start_i, int end_i,
duke@0 1105 constantPoolHandle to_cp, int to_i, TRAPS) {
duke@0 1106
duke@0 1107 int dest_i = to_i; // leave original alone for debug purposes
duke@0 1108
jrose@1924 1109 for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) {
jrose@1924 1110 copy_entry_to(from_cp, src_i, to_cp, dest_i, CHECK);
jrose@1838 1111
jrose@1924 1112 switch (from_cp->tag_at(src_i).value()) {
duke@0 1113 case JVM_CONSTANT_Double:
duke@0 1114 case JVM_CONSTANT_Long:
duke@0 1115 // double and long take two constant pool entries
duke@0 1116 src_i += 2;
duke@0 1117 dest_i += 2;
duke@0 1118 break;
duke@0 1119
duke@0 1120 default:
duke@0 1121 // all others take one constant pool entry
duke@0 1122 src_i++;
duke@0 1123 dest_i++;
duke@0 1124 break;
duke@0 1125 }
duke@0 1126 }
jrose@1924 1127
jrose@1924 1128 int from_oplen = operand_array_length(from_cp->operands());
jrose@1924 1129 int old_oplen = operand_array_length(to_cp->operands());
jrose@1924 1130 if (from_oplen != 0) {
kamg@3874 1131 ClassLoaderData* loader_data = to_cp->pool_holder()->class_loader_data();
jrose@1924 1132 // append my operands to the target's operands array
jrose@1924 1133 if (old_oplen == 0) {
kamg@3874 1134 // Can't just reuse from_cp's operand list because of deallocation issues
kamg@3874 1135 int len = from_cp->operands()->length();
kamg@3874 1136 Array<u2>* new_ops = MetadataFactory::new_array<u2>(loader_data, len, CHECK);
kamg@3874 1137 Copy::conjoint_memory_atomic(
kamg@3874 1138 from_cp->operands()->adr_at(0), new_ops->adr_at(0), len * sizeof(u2));
kamg@3874 1139 to_cp->set_operands(new_ops);
jrose@1924 1140 } else {
jrose@1924 1141 int old_len = to_cp->operands()->length();
jrose@1924 1142 int from_len = from_cp->operands()->length();
jrose@1924 1143 int old_off = old_oplen * sizeof(u2);
jrose@1924 1144 int from_off = from_oplen * sizeof(u2);
coleenp@3656 1145 // Use the metaspace for the destination constant pool
coleenp@3656 1146 Array<u2>* new_operands = MetadataFactory::new_array<u2>(loader_data, old_len + from_len, CHECK);
jrose@1924 1147 int fillp = 0, len = 0;
jrose@1924 1148 // first part of dest
coleenp@3656 1149 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(0),
coleenp@3656 1150 new_operands->adr_at(fillp),
jrose@1924 1151 (len = old_off) * sizeof(u2));
jrose@1924 1152 fillp += len;
jrose@1924 1153 // first part of src
coleenp@3656 1154 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(0),
coleenp@3656 1155 new_operands->adr_at(fillp),
jrose@1924 1156 (len = from_off) * sizeof(u2));
jrose@1924 1157 fillp += len;
jrose@1924 1158 // second part of dest
coleenp@3656 1159 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(old_off),
coleenp@3656 1160 new_operands->adr_at(fillp),
jrose@1924 1161 (len = old_len - old_off) * sizeof(u2));
jrose@1924 1162 fillp += len;
jrose@1924 1163 // second part of src
coleenp@3656 1164 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(from_off),
coleenp@3656 1165 new_operands->adr_at(fillp),
jrose@1924 1166 (len = from_len - from_off) * sizeof(u2));
jrose@1924 1167 fillp += len;
jrose@1924 1168 assert(fillp == new_operands->length(), "");
jrose@1924 1169
jrose@1924 1170 // Adjust indexes in the first part of the copied operands array.
jrose@1924 1171 for (int j = 0; j < from_oplen; j++) {
coleenp@3656 1172 int offset = operand_offset_at(new_operands, old_oplen + j);
jrose@1924 1173 assert(offset == operand_offset_at(from_cp->operands(), j), "correct copy");
jrose@1924 1174 offset += old_len; // every new tuple is preceded by old_len extra u2's
coleenp@3656 1175 operand_offset_at_put(new_operands, old_oplen + j, offset);
jrose@1924 1176 }
jrose@1924 1177
jrose@1924 1178 // replace target operands array with combined array
coleenp@3656 1179 to_cp->set_operands(new_operands);
jrose@1924 1180 }
jrose@1924 1181 }
jrose@1924 1182
duke@0 1183 } // end copy_cp_to()
duke@0 1184
duke@0 1185
duke@0 1186 // Copy this constant pool's entry at from_i to the constant pool
duke@0 1187 // to_cp's entry at to_i.
coleenp@3656 1188 void ConstantPool::copy_entry_to(constantPoolHandle from_cp, int from_i,
jrose@1924 1189 constantPoolHandle to_cp, int to_i,
jrose@1924 1190 TRAPS) {
duke@0 1191
jrose@1924 1192 int tag = from_cp->tag_at(from_i).value();
jrose@1924 1193 switch (tag) {
duke@0 1194 case JVM_CONSTANT_Class:
duke@0 1195 {
coleenp@3656 1196 Klass* k = from_cp->klass_at(from_i, CHECK);
duke@0 1197 to_cp->klass_at_put(to_i, k);
duke@0 1198 } break;
duke@0 1199
duke@0 1200 case JVM_CONSTANT_ClassIndex:
duke@0 1201 {
jrose@1924 1202 jint ki = from_cp->klass_index_at(from_i);
duke@0 1203 to_cp->klass_index_at_put(to_i, ki);
duke@0 1204 } break;
duke@0 1205
duke@0 1206 case JVM_CONSTANT_Double:
duke@0 1207 {
jrose@1924 1208 jdouble d = from_cp->double_at(from_i);
duke@0 1209 to_cp->double_at_put(to_i, d);
duke@0 1210 // double takes two constant pool entries so init second entry's tag
duke@0 1211 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid);
duke@0 1212 } break;
duke@0 1213
duke@0 1214 case JVM_CONSTANT_Fieldref:
duke@0 1215 {
jrose@1924 1216 int class_index = from_cp->uncached_klass_ref_index_at(from_i);
jrose@1924 1217 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i);
duke@0 1218 to_cp->field_at_put(to_i, class_index, name_and_type_index);
duke@0 1219 } break;
duke@0 1220
duke@0 1221 case JVM_CONSTANT_Float:
duke@0 1222 {
jrose@1924 1223 jfloat f = from_cp->float_at(from_i);
duke@0 1224 to_cp->float_at_put(to_i, f);
duke@0 1225 } break;
duke@0 1226
duke@0 1227 case JVM_CONSTANT_Integer:
duke@0 1228 {
jrose@1924 1229 jint i = from_cp->int_at(from_i);
duke@0 1230 to_cp->int_at_put(to_i, i);
duke@0 1231 } break;
duke@0 1232
duke@0 1233 case JVM_CONSTANT_InterfaceMethodref:
duke@0 1234 {
jrose@1924 1235 int class_index = from_cp->uncached_klass_ref_index_at(from_i);
jrose@1924 1236 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i);
duke@0 1237 to_cp->interface_method_at_put(to_i, class_index, name_and_type_index);
duke@0 1238 } break;
duke@0 1239
duke@0 1240 case JVM_CONSTANT_Long:
duke@0 1241 {
jrose@1924 1242 jlong l = from_cp->long_at(from_i);
duke@0 1243 to_cp->long_at_put(to_i, l);
duke@0 1244 // long takes two constant pool entries so init second entry's tag
duke@0 1245 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid);
duke@0 1246 } break;
duke@0 1247
duke@0 1248 case JVM_CONSTANT_Methodref:
duke@0 1249 {
jrose@1924 1250 int class_index = from_cp->uncached_klass_ref_index_at(from_i);
jrose@1924 1251 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i);
duke@0 1252 to_cp->method_at_put(to_i, class_index, name_and_type_index);
duke@0 1253 } break;
duke@0 1254
duke@0 1255 case JVM_CONSTANT_NameAndType:
duke@0 1256 {
jrose@1924 1257 int name_ref_index = from_cp->name_ref_index_at(from_i);
jrose@1924 1258 int signature_ref_index = from_cp->signature_ref_index_at(from_i);
duke@0 1259 to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index);
duke@0 1260 } break;
duke@0 1261
duke@0 1262 case JVM_CONSTANT_StringIndex:
duke@0 1263 {
jrose@1924 1264 jint si = from_cp->string_index_at(from_i);
duke@0 1265 to_cp->string_index_at_put(to_i, si);
duke@0 1266 } break;
duke@0 1267
duke@0 1268 case JVM_CONSTANT_UnresolvedClass:
duke@0 1269 {
coleenp@2187 1270 // Can be resolved after checking tag, so check the slot first.
coleenp@2187 1271 CPSlot entry = from_cp->slot_at(from_i);
coleenp@3656 1272 if (entry.is_resolved()) {
coleenp@3656 1273 assert(entry.get_klass()->is_klass(), "must be");
coleenp@2187 1274 // Already resolved
coleenp@3656 1275 to_cp->klass_at_put(to_i, entry.get_klass());
coleenp@2187 1276 } else {
coleenp@2187 1277 to_cp->unresolved_klass_at_put(to_i, entry.get_symbol());
coleenp@2187 1278 }
duke@0 1279 } break;
duke@0 1280
duke@0 1281 case JVM_CONSTANT_UnresolvedClassInError:
duke@0 1282 {
coleenp@2069 1283 Symbol* k = from_cp->unresolved_klass_at(from_i);
duke@0 1284 to_cp->unresolved_klass_at_put(to_i, k);
duke@0 1285 to_cp->tag_at_put(to_i, JVM_CONSTANT_UnresolvedClassInError);
duke@0 1286 } break;
duke@0 1287
duke@0 1288
coleenp@3656 1289 case JVM_CONSTANT_String:
duke@0 1290 {
coleenp@3656 1291 Symbol* s = from_cp->unresolved_string_at(from_i);
coleenp@3656 1292 to_cp->unresolved_string_at_put(to_i, s);
duke@0 1293 } break;
duke@0 1294
duke@0 1295 case JVM_CONSTANT_Utf8:
duke@0 1296 {
coleenp@2069 1297 Symbol* s = from_cp->symbol_at(from_i);
coleenp@3656 1298 // Need to increase refcount, the old one will be thrown away and deferenced
coleenp@3656 1299 s->increment_refcount();
duke@0 1300 to_cp->symbol_at_put(to_i, s);
duke@0 1301 } break;
duke@0 1302
jrose@1524 1303 case JVM_CONSTANT_MethodType:
jrose@1524 1304 {
jrose@1924 1305 jint k = from_cp->method_type_index_at(from_i);
jrose@1524 1306 to_cp->method_type_index_at_put(to_i, k);
jrose@1524 1307 } break;
jrose@1524 1308
jrose@1524 1309 case JVM_CONSTANT_MethodHandle:
jrose@1524 1310 {
jrose@1924 1311 int k1 = from_cp->method_handle_ref_kind_at(from_i);
jrose@1924 1312 int k2 = from_cp->method_handle_index_at(from_i);
jrose@1524 1313 to_cp->method_handle_index_at_put(to_i, k1, k2);
jrose@1524 1314 } break;
jrose@1524 1315
jrose@1583 1316 case JVM_CONSTANT_InvokeDynamic:
jrose@1583 1317 {
jrose@1924 1318 int k1 = from_cp->invoke_dynamic_bootstrap_specifier_index(from_i);
jrose@1924 1319 int k2 = from_cp->invoke_dynamic_name_and_type_ref_index_at(from_i);
jrose@1924 1320 k1 += operand_array_length(to_cp->operands()); // to_cp might already have operands
jrose@1924 1321 to_cp->invoke_dynamic_at_put(to_i, k1, k2);
jrose@1583 1322 } break;
jrose@1583 1323
duke@0 1324 // Invalid is used as the tag for the second constant pool entry
duke@0 1325 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should
duke@0 1326 // not be seen by itself.
duke@0 1327 case JVM_CONSTANT_Invalid: // fall through
duke@0 1328
duke@0 1329 default:
duke@0 1330 {
duke@0 1331 ShouldNotReachHere();
duke@0 1332 } break;
duke@0 1333 }
duke@0 1334 } // end copy_entry_to()
duke@0 1335
duke@0 1336
duke@0 1337 // Search constant pool search_cp for an entry that matches this
duke@0 1338 // constant pool's entry at pattern_i. Returns the index of a
duke@0 1339 // matching entry or zero (0) if there is no matching entry.
coleenp@3656 1340 int ConstantPool::find_matching_entry(int pattern_i,
duke@0 1341 constantPoolHandle search_cp, TRAPS) {
duke@0 1342
duke@0 1343 // index zero (0) is not used
duke@0 1344 for (int i = 1; i < search_cp->length(); i++) {
duke@0 1345 bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0);
duke@0 1346 if (found) {
duke@0 1347 return i;
duke@0 1348 }
duke@0 1349 }
duke@0 1350
duke@0 1351 return 0; // entry not found; return unused index zero (0)
duke@0 1352 } // end find_matching_entry()
duke@0 1353
duke@0 1354
duke@0 1355 #ifndef PRODUCT
duke@0 1356
coleenp@3656 1357 const char* ConstantPool::printable_name_at(int which) {
duke@0 1358
duke@0 1359 constantTag tag = tag_at(which);
duke@0 1360
coleenp@3656 1361 if (tag.is_string()) {
duke@0 1362 return string_at_noresolve(which);
duke@0 1363 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
duke@0 1364 return klass_name_at(which)->as_C_string();
duke@0 1365 } else if (tag.is_symbol()) {
duke@0 1366 return symbol_at(which)->as_C_string();
duke@0 1367 }
duke@0 1368 return "";
duke@0 1369 }
duke@0 1370
duke@0 1371 #endif // PRODUCT
duke@0 1372
duke@0 1373
duke@0 1374 // JVMTI GetConstantPool support
duke@0 1375
duke@0 1376 // For temporary use until code is stable.
duke@0 1377 #define DBG(code)
duke@0 1378
duke@0 1379 static const char* WARN_MSG = "Must not be such entry!";
duke@0 1380
duke@0 1381 static void print_cpool_bytes(jint cnt, u1 *bytes) {
duke@0 1382 jint size = 0;
duke@0 1383 u2 idx1, idx2;
duke@0 1384
duke@0 1385 for (jint idx = 1; idx < cnt; idx++) {
duke@0 1386 jint ent_size = 0;
duke@0 1387 u1 tag = *bytes++;
duke@0 1388 size++; // count tag
duke@0 1389
duke@0 1390 printf("const #%03d, tag: %02d ", idx, tag);
duke@0 1391 switch(tag) {
duke@0 1392 case JVM_CONSTANT_Invalid: {
duke@0 1393 printf("Invalid");
duke@0 1394 break;
duke@0 1395 }
duke@0 1396 case JVM_CONSTANT_Unicode: {
duke@0 1397 printf("Unicode %s", WARN_MSG);
duke@0 1398 break;
duke@0 1399 }
duke@0 1400 case JVM_CONSTANT_Utf8: {
duke@0 1401 u2 len = Bytes::get_Java_u2(bytes);
duke@0 1402 char str[128];
duke@0 1403 if (len > 127) {
duke@0 1404 len = 127;
duke@0 1405 }
duke@0 1406 strncpy(str, (char *) (bytes+2), len);
duke@0 1407 str[len] = '\0';
duke@0 1408 printf("Utf8 \"%s\"", str);
duke@0 1409 ent_size = 2 + len;
duke@0 1410 break;
duke@0 1411 }
duke@0 1412 case JVM_CONSTANT_Integer: {
duke@0 1413 u4 val = Bytes::get_Java_u4(bytes);
duke@0 1414 printf("int %d", *(int *) &val);
duke@0 1415 ent_size = 4;
duke@0 1416 break;
duke@0 1417 }
duke@0 1418 case JVM_CONSTANT_Float: {
duke@0 1419 u4 val = Bytes::get_Java_u4(bytes);
duke@0 1420 printf("float %5.3ff", *(float *) &val);
duke@0 1421 ent_size = 4;
duke@0 1422 break;
duke@0 1423 }
duke@0 1424 case JVM_CONSTANT_Long: {
duke@0 1425 u8 val = Bytes::get_Java_u8(bytes);
never@2731 1426 printf("long "INT64_FORMAT, (int64_t) *(jlong *) &val);
duke@0 1427 ent_size = 8;
duke@0 1428 idx++; // Long takes two cpool slots
duke@0 1429 break;
duke@0 1430 }
duke@0 1431 case JVM_CONSTANT_Double: {
duke@0 1432 u8 val = Bytes::get_Java_u8(bytes);
duke@0 1433 printf("double %5.3fd", *(jdouble *)&val);
duke@0 1434 ent_size = 8;
duke@0 1435 idx++; // Double takes two cpool slots
duke@0 1436 break;
duke@0 1437 }
duke@0 1438 case JVM_CONSTANT_Class: {
duke@0 1439 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1440 printf("class #%03d", idx1);
duke@0 1441 ent_size = 2;
duke@0 1442 break;
duke@0 1443 }
duke@0 1444 case JVM_CONSTANT_String: {
duke@0 1445 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1446 printf("String #%03d", idx1);
duke@0 1447 ent_size = 2;
duke@0 1448 break;
duke@0 1449 }
duke@0 1450 case JVM_CONSTANT_Fieldref: {
duke@0 1451 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1452 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 1453 printf("Field #%03d, #%03d", (int) idx1, (int) idx2);
duke@0 1454 ent_size = 4;
duke@0 1455 break;
duke@0 1456 }
duke@0 1457 case JVM_CONSTANT_Methodref: {
duke@0 1458 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1459 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 1460 printf("Method #%03d, #%03d", idx1, idx2);
duke@0 1461 ent_size = 4;
duke@0 1462 break;
duke@0 1463 }
duke@0 1464 case JVM_CONSTANT_InterfaceMethodref: {
duke@0 1465 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1466 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 1467 printf("InterfMethod #%03d, #%03d", idx1, idx2);
duke@0 1468 ent_size = 4;
duke@0 1469 break;
duke@0 1470 }
duke@0 1471 case JVM_CONSTANT_NameAndType: {
duke@0 1472 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1473 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 1474 printf("NameAndType #%03d, #%03d", idx1, idx2);
duke@0 1475 ent_size = 4;
duke@0 1476 break;
duke@0 1477 }
duke@0 1478 case JVM_CONSTANT_ClassIndex: {
duke@0 1479 printf("ClassIndex %s", WARN_MSG);
duke@0 1480 break;
duke@0 1481 }
duke@0 1482 case JVM_CONSTANT_UnresolvedClass: {
duke@0 1483 printf("UnresolvedClass: %s", WARN_MSG);
duke@0 1484 break;
duke@0 1485 }
duke@0 1486 case JVM_CONSTANT_UnresolvedClassInError: {
duke@0 1487 printf("UnresolvedClassInErr: %s", WARN_MSG);
duke@0 1488 break;
duke@0 1489 }
duke@0 1490 case JVM_CONSTANT_StringIndex: {
duke@0 1491 printf("StringIndex: %s", WARN_MSG);
duke@0 1492 break;
duke@0 1493 }
duke@0 1494 }
duke@0 1495 printf(";\n");
duke@0 1496 bytes += ent_size;
duke@0 1497 size += ent_size;
duke@0 1498 }
duke@0 1499 printf("Cpool size: %d\n", size);
duke@0 1500 fflush(0);
duke@0 1501 return;
duke@0 1502 } /* end print_cpool_bytes */
duke@0 1503
duke@0 1504
duke@0 1505 // Returns size of constant pool entry.
coleenp@3656 1506 jint ConstantPool::cpool_entry_size(jint idx) {
duke@0 1507 switch(tag_at(idx).value()) {
duke@0 1508 case JVM_CONSTANT_Invalid:
duke@0 1509 case JVM_CONSTANT_Unicode:
duke@0 1510 return 1;
duke@0 1511
duke@0 1512 case JVM_CONSTANT_Utf8:
duke@0 1513 return 3 + symbol_at(idx)->utf8_length();
duke@0 1514
duke@0 1515 case JVM_CONSTANT_Class:
duke@0 1516 case JVM_CONSTANT_String:
duke@0 1517 case JVM_CONSTANT_ClassIndex:
duke@0 1518 case JVM_CONSTANT_UnresolvedClass:
duke@0 1519 case JVM_CONSTANT_UnresolvedClassInError:
duke@0 1520 case JVM_CONSTANT_StringIndex:
jrose@1524 1521 case JVM_CONSTANT_MethodType:
duke@0 1522 return 3;
duke@0 1523
jrose@1524 1524 case JVM_CONSTANT_MethodHandle:
jrose@1524 1525 return 4; //tag, ref_kind, ref_index
jrose@1524 1526
duke@0 1527 case JVM_CONSTANT_Integer:
duke@0 1528 case JVM_CONSTANT_Float:
duke@0 1529 case JVM_CONSTANT_Fieldref:
duke@0 1530 case JVM_CONSTANT_Methodref:
duke@0 1531 case JVM_CONSTANT_InterfaceMethodref:
duke@0 1532 case JVM_CONSTANT_NameAndType:
jrose@1838 1533 return 5;
jrose@1838 1534
jrose@1583 1535 case JVM_CONSTANT_InvokeDynamic:
jrose@1924 1536 // u1 tag, u2 bsm, u2 nt
jrose@1924 1537 return 5;
duke@0 1538
duke@0 1539 case JVM_CONSTANT_Long:
duke@0 1540 case JVM_CONSTANT_Double:
duke@0 1541 return 9;
duke@0 1542 }
duke@0 1543 assert(false, "cpool_entry_size: Invalid constant pool entry tag");
duke@0 1544 return 1;
duke@0 1545 } /* end cpool_entry_size */
duke@0 1546
duke@0 1547
duke@0 1548 // SymbolHashMap is used to find a constant pool index from a string.
duke@0 1549 // This function fills in SymbolHashMaps, one for utf8s and one for
duke@0 1550 // class names, returns size of the cpool raw bytes.
coleenp@3656 1551 jint ConstantPool::hash_entries_to(SymbolHashMap *symmap,
duke@0 1552 SymbolHashMap *classmap) {
duke@0 1553 jint size = 0;
duke@0 1554
duke@0 1555 for (u2 idx = 1; idx < length(); idx++) {
duke@0 1556 u2 tag = tag_at(idx).value();
duke@0 1557 size += cpool_entry_size(idx);
duke@0 1558
duke@0 1559 switch(tag) {
duke@0 1560 case JVM_CONSTANT_Utf8: {
coleenp@2069 1561 Symbol* sym = symbol_at(idx);
duke@0 1562 symmap->add_entry(sym, idx);
duke@0 1563 DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx));
duke@0 1564 break;
duke@0 1565 }
duke@0 1566 case JVM_CONSTANT_Class:
duke@0 1567 case JVM_CONSTANT_UnresolvedClass:
duke@0 1568 case JVM_CONSTANT_UnresolvedClassInError: {
coleenp@2069 1569 Symbol* sym = klass_name_at(idx);
duke@0 1570 classmap->add_entry(sym, idx);
duke@0 1571 DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx));
duke@0 1572 break;
duke@0 1573 }
duke@0 1574 case JVM_CONSTANT_Long:
duke@0 1575 case JVM_CONSTANT_Double: {
duke@0 1576 idx++; // Both Long and Double take two cpool slots
duke@0 1577 break;
duke@0 1578 }
duke@0 1579 }
duke@0 1580 }
duke@0 1581 return size;
duke@0 1582 } /* end hash_utf8_entries_to */
duke@0 1583
duke@0 1584
duke@0 1585 // Copy cpool bytes.
duke@0 1586 // Returns:
duke@0 1587 // 0, in case of OutOfMemoryError
duke@0 1588 // -1, in case of internal error
duke@0 1589 // > 0, count of the raw cpool bytes that have been copied
coleenp@3656 1590 int ConstantPool::copy_cpool_bytes(int cpool_size,
duke@0 1591 SymbolHashMap* tbl,
duke@0 1592 unsigned char *bytes) {
duke@0 1593 u2 idx1, idx2;
duke@0 1594 jint size = 0;
duke@0 1595 jint cnt = length();
duke@0 1596 unsigned char *start_bytes = bytes;
duke@0 1597
duke@0 1598 for (jint idx = 1; idx < cnt; idx++) {
duke@0 1599 u1 tag = tag_at(idx).value();
duke@0 1600 jint ent_size = cpool_entry_size(idx);
duke@0 1601
duke@0 1602 assert(size + ent_size <= cpool_size, "Size mismatch");
duke@0 1603
duke@0 1604 *bytes = tag;
duke@0 1605 DBG(printf("#%03hd tag=%03hd, ", idx, tag));
duke@0 1606 switch(tag) {
duke@0 1607 case JVM_CONSTANT_Invalid: {
duke@0 1608 DBG(printf("JVM_CONSTANT_Invalid"));
duke@0 1609 break;
duke@0 1610 }
duke@0 1611 case JVM_CONSTANT_Unicode: {
duke@0 1612 assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode");
duke@0 1613 DBG(printf("JVM_CONSTANT_Unicode"));
duke@0 1614 break;
duke@0 1615 }
duke@0 1616 case JVM_CONSTANT_Utf8: {
coleenp@2069 1617 Symbol* sym = symbol_at(idx);
duke@0 1618 char* str = sym->as_utf8();
duke@0 1619 // Warning! It's crashing on x86 with len = sym->utf8_length()
duke@0 1620 int len = (int) strlen(str);
duke@0 1621 Bytes::put_Java_u2((address) (bytes+1), (u2) len);
duke@0 1622 for (int i = 0; i < len; i++) {
duke@0 1623 bytes[3+i] = (u1) str[i];
duke@0 1624 }
duke@0 1625 DBG(printf("JVM_CONSTANT_Utf8: %s ", str));
duke@0 1626 break;
duke@0 1627 }
duke@0 1628 case JVM_CONSTANT_Integer: {
duke@0 1629 jint val = int_at(idx);
duke@0 1630 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val);
duke@0 1631 break;
duke@0 1632 }
duke@0 1633 case JVM_CONSTANT_Float: {
duke@0 1634 jfloat val = float_at(idx);
duke@0 1635 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val);
duke@0 1636 break;
duke@0 1637 }
duke@0 1638 case JVM_CONSTANT_Long: {
duke@0 1639 jlong val = long_at(idx);
duke@0 1640 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val);
duke@0 1641 idx++; // Long takes two cpool slots
duke@0 1642 break;
duke@0 1643 }
duke@0 1644 case JVM_CONSTANT_Double: {
duke@0 1645 jdouble val = double_at(idx);
duke@0 1646 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val);
duke@0 1647 idx++; // Double takes two cpool slots
duke@0 1648 break;
duke@0 1649 }
duke@0 1650 case JVM_CONSTANT_Class:
duke@0 1651 case JVM_CONSTANT_UnresolvedClass:
duke@0 1652 case JVM_CONSTANT_UnresolvedClassInError: {
duke@0 1653 *bytes = JVM_CONSTANT_Class;
coleenp@2069 1654 Symbol* sym = klass_name_at(idx);
duke@0 1655 idx1 = tbl->symbol_to_value(sym);
duke@0 1656 assert(idx1 != 0, "Have not found a hashtable entry");
duke@0 1657 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1658 DBG(printf("JVM_CONSTANT_Class: idx=#%03hd, %s", idx1, sym->as_utf8()));
duke@0 1659 break;
duke@0 1660 }
duke@0 1661 case JVM_CONSTANT_String: {
duke@0 1662 *bytes = JVM_CONSTANT_String;
coleenp@2069 1663 Symbol* sym = unresolved_string_at(idx);
duke@0 1664 idx1 = tbl->symbol_to_value(sym);
duke@0 1665 assert(idx1 != 0, "Have not found a hashtable entry");
duke@0 1666 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1667 DBG(char *str = sym->as_utf8());
coleenp@3656 1668 DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, str));
duke@0 1669 break;
duke@0 1670 }
duke@0 1671 case JVM_CONSTANT_Fieldref:
duke@0 1672 case JVM_CONSTANT_Methodref:
duke@0 1673 case JVM_CONSTANT_InterfaceMethodref: {
duke@0 1674 idx1 = uncached_klass_ref_index_at(idx);
duke@0 1675 idx2 = uncached_name_and_type_ref_index_at(idx);
duke@0 1676 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1677 Bytes::put_Java_u2((address) (bytes+3), idx2);
duke@0 1678 DBG(printf("JVM_CONSTANT_Methodref: %hd %hd", idx1, idx2));
duke@0 1679 break;
duke@0 1680 }
duke@0 1681 case JVM_CONSTANT_NameAndType: {
duke@0 1682 idx1 = name_ref_index_at(idx);
duke@0 1683 idx2 = signature_ref_index_at(idx);
duke@0 1684 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1685 Bytes::put_Java_u2((address) (bytes+3), idx2);
duke@0 1686 DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2));
duke@0 1687 break;
duke@0 1688 }
duke@0 1689 case JVM_CONSTANT_ClassIndex: {
duke@0 1690 *bytes = JVM_CONSTANT_Class;
duke@0 1691 idx1 = klass_index_at(idx);
duke@0 1692 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1693 DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1));
duke@0 1694 break;
duke@0 1695 }
duke@0 1696 case JVM_CONSTANT_StringIndex: {
duke@0 1697 *bytes = JVM_CONSTANT_String;
duke@0 1698 idx1 = string_index_at(idx);
duke@0 1699 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1700 DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1));
duke@0 1701 break;
duke@0 1702 }
coleenp@3656 1703 case JVM_CONSTANT_MethodHandle:
coleenp@3656 1704 case JVM_CONSTANT_MethodHandleInError: {
jrose@1524 1705 *bytes = JVM_CONSTANT_MethodHandle;
jrose@1524 1706 int kind = method_handle_ref_kind_at(idx);
jrose@1524 1707 idx1 = method_handle_index_at(idx);
jrose@1524 1708 *(bytes+1) = (unsigned char) kind;
jrose@1524 1709 Bytes::put_Java_u2((address) (bytes+2), idx1);
jrose@1524 1710 DBG(printf("JVM_CONSTANT_MethodHandle: %d %hd", kind, idx1));
jrose@1524 1711 break;
jrose@1524 1712 }
coleenp@3656 1713 case JVM_CONSTANT_MethodType:
coleenp@3656 1714 case JVM_CONSTANT_MethodTypeInError: {
jrose@1524 1715 *bytes = JVM_CONSTANT_MethodType;
jrose@1524 1716 idx1 = method_type_index_at(idx);
jrose@1524 1717 Bytes::put_Java_u2((address) (bytes+1), idx1);
jrose@1524 1718 DBG(printf("JVM_CONSTANT_MethodType: %hd", idx1));
jrose@1524 1719 break;
jrose@1524 1720 }
jrose@1583 1721 case JVM_CONSTANT_InvokeDynamic: {
jrose@1924 1722 *bytes = tag;
jrose@1924 1723 idx1 = extract_low_short_from_int(*int_at_addr(idx));
jrose@1924 1724 idx2 = extract_high_short_from_int(*int_at_addr(idx));
jrose@1924 1725 assert(idx2 == invoke_dynamic_name_and_type_ref_index_at(idx), "correct half of u4");
jrose@1583 1726 Bytes::put_Java_u2((address) (bytes+1), idx1);
jrose@1583 1727 Bytes::put_Java_u2((address) (bytes+3), idx2);
jrose@1924 1728 DBG(printf("JVM_CONSTANT_InvokeDynamic: %hd %hd", idx1, idx2));
jrose@1583 1729 break;
jrose@1583 1730 }
duke@0 1731 }
duke@0 1732 DBG(printf("\n"));
duke@0 1733 bytes += ent_size;
duke@0 1734 size += ent_size;
duke@0 1735 }
duke@0 1736 assert(size == cpool_size, "Size mismatch");
duke@0 1737
duke@0 1738 // Keep temorarily for debugging until it's stable.
duke@0 1739 DBG(print_cpool_bytes(cnt, start_bytes));
duke@0 1740 return (int)(bytes - start_bytes);
duke@0 1741 } /* end copy_cpool_bytes */
duke@0 1742
duke@0 1743
coleenp@3656 1744 void ConstantPool::set_on_stack(const bool value) {
coleenp@4132 1745 if (value) {
coleenp@4132 1746 _flags |= _on_stack;
coleenp@4132 1747 } else {
coleenp@4132 1748 _flags &= ~_on_stack;
coleenp@4132 1749 }
coleenp@3656 1750 if (value) MetadataOnStackMark::record(this);
coleenp@3656 1751 }
coleenp@3656 1752
coleenp@3656 1753 // JSR 292 support for patching constant pool oops after the class is linked and
coleenp@3656 1754 // the oop array for resolved references are created.
coleenp@3656 1755 // We can't do this during classfile parsing, which is how the other indexes are
coleenp@3656 1756 // patched. The other patches are applied early for some error checking
coleenp@3656 1757 // so only defer the pseudo_strings.
coleenp@3656 1758 void ConstantPool::patch_resolved_references(
coleenp@3656 1759 GrowableArray<Handle>* cp_patches) {
coleenp@3656 1760 assert(EnableInvokeDynamic, "");
coleenp@3656 1761 for (int index = 1; index < cp_patches->length(); index++) { // Index 0 is unused
coleenp@3656 1762 Handle patch = cp_patches->at(index);
coleenp@3656 1763 if (patch.not_null()) {
coleenp@3656 1764 assert (tag_at(index).is_string(), "should only be string left");
coleenp@3656 1765 // Patching a string means pre-resolving it.
coleenp@3656 1766 // The spelling in the constant pool is ignored.
coleenp@3656 1767 // The constant reference may be any object whatever.
coleenp@3656 1768 // If it is not a real interned string, the constant is referred
coleenp@3656 1769 // to as a "pseudo-string", and must be presented to the CP
coleenp@3656 1770 // explicitly, because it may require scavenging.
coleenp@3656 1771 int obj_index = cp_to_object_index(index);
coleenp@3656 1772 pseudo_string_at_put(index, obj_index, patch());
coleenp@3656 1773 DEBUG_ONLY(cp_patches->at_put(index, Handle());)
coleenp@3656 1774 }
coleenp@3656 1775 }
coleenp@3656 1776 #ifdef ASSERT
coleenp@3656 1777 // Ensure that all the patches have been used.
coleenp@3656 1778 for (int index = 0; index < cp_patches->length(); index++) {
coleenp@3656 1779 assert(cp_patches->at(index).is_null(),
coleenp@3656 1780 err_msg("Unused constant pool patch at %d in class file %s",
coleenp@3656 1781 index,
coleenp@3880 1782 pool_holder()->external_name()));
coleenp@3656 1783 }
coleenp@3656 1784 #endif // ASSERT
coleenp@3656 1785 }
coleenp@3656 1786
coleenp@3656 1787 #ifndef PRODUCT
coleenp@3656 1788
coleenp@3656 1789 // CompileTheWorld support. Preload all classes loaded references in the passed in constantpool
coleenp@3656 1790 void ConstantPool::preload_and_initialize_all_classes(ConstantPool* obj, TRAPS) {
coleenp@3656 1791 guarantee(obj->is_constantPool(), "object must be constant pool");
coleenp@3656 1792 constantPoolHandle cp(THREAD, (ConstantPool*)obj);
coleenp@3656 1793 guarantee(cp->pool_holder() != NULL, "must be fully loaded");
coleenp@3656 1794
coleenp@3656 1795 for (int i = 0; i< cp->length(); i++) {
coleenp@3656 1796 if (cp->tag_at(i).is_unresolved_klass()) {
coleenp@3656 1797 // This will force loading of the class
coleenp@3656 1798 Klass* klass = cp->klass_at(i, CHECK);
coleenp@3656 1799 if (klass->oop_is_instance()) {
coleenp@3656 1800 // Force initialization of class
coleenp@3656 1801 InstanceKlass::cast(klass)->initialize(CHECK);
coleenp@3656 1802 }
coleenp@3656 1803 }
coleenp@3656 1804 }
coleenp@3656 1805 }
coleenp@3656 1806
coleenp@3656 1807 #endif
coleenp@3656 1808
coleenp@3656 1809
coleenp@3656 1810 // Printing
coleenp@3656 1811
coleenp@3656 1812 void ConstantPool::print_on(outputStream* st) const {
coleenp@3656 1813 EXCEPTION_MARK;
coleenp@3656 1814 assert(is_constantPool(), "must be constantPool");
coleenp@3656 1815 st->print_cr(internal_name());
coleenp@3656 1816 if (flags() != 0) {
coleenp@3656 1817 st->print(" - flags: 0x%x", flags());
coleenp@3656 1818 if (has_pseudo_string()) st->print(" has_pseudo_string");
coleenp@3656 1819 if (has_invokedynamic()) st->print(" has_invokedynamic");
coleenp@3656 1820 if (has_preresolution()) st->print(" has_preresolution");
coleenp@4132 1821 if (on_stack()) st->print(" on_stack");
coleenp@3656 1822 st->cr();
coleenp@3656 1823 }
coleenp@3656 1824 if (pool_holder() != NULL) {
coleenp@3656 1825 st->print_cr(" - holder: " INTPTR_FORMAT, pool_holder());
coleenp@3656 1826 }
coleenp@3656 1827 st->print_cr(" - cache: " INTPTR_FORMAT, cache());
coleenp@3656 1828 st->print_cr(" - resolved_references: " INTPTR_FORMAT, resolved_references());
coleenp@3656 1829 st->print_cr(" - reference_map: " INTPTR_FORMAT, reference_map());
coleenp@3656 1830
coleenp@3656 1831 for (int index = 1; index < length(); index++) { // Index 0 is unused
coleenp@3656 1832 ((ConstantPool*)this)->print_entry_on(index, st);
coleenp@3656 1833 switch (tag_at(index).value()) {
coleenp@3656 1834 case JVM_CONSTANT_Long :
coleenp@3656 1835 case JVM_CONSTANT_Double :
coleenp@3656 1836 index++; // Skip entry following eigth-byte constant
coleenp@3656 1837 }
coleenp@3656 1838
coleenp@3656 1839 }
coleenp@3656 1840 st->cr();
coleenp@3656 1841 }
coleenp@3656 1842
coleenp@3656 1843 // Print one constant pool entry
coleenp@3656 1844 void ConstantPool::print_entry_on(const int index, outputStream* st) {
coleenp@3656 1845 EXCEPTION_MARK;
coleenp@3656 1846 st->print(" - %3d : ", index);
coleenp@3656 1847 tag_at(index).print_on(st);
coleenp@3656 1848 st->print(" : ");
coleenp@3656 1849 switch (tag_at(index).value()) {
coleenp@3656 1850 case JVM_CONSTANT_Class :
coleenp@3656 1851 { Klass* k = klass_at(index, CATCH);
coleenp@3656 1852 k->print_value_on(st);
coleenp@3656 1853 st->print(" {0x%lx}", (address)k);
coleenp@3656 1854 }
coleenp@3656 1855 break;
coleenp@3656 1856 case JVM_CONSTANT_Fieldref :
coleenp@3656 1857 case JVM_CONSTANT_Methodref :
coleenp@3656 1858 case JVM_CONSTANT_InterfaceMethodref :
coleenp@3656 1859 st->print("klass_index=%d", uncached_klass_ref_index_at(index));
coleenp@3656 1860 st->print(" name_and_type_index=%d", uncached_name_and_type_ref_index_at(index));
coleenp@3656 1861 break;
coleenp@3656 1862 case JVM_CONSTANT_String :
coleenp@3656 1863 unresolved_string_at(index)->print_value_on(st);
coleenp@3656 1864 break;
coleenp@3656 1865 case JVM_CONSTANT_Object : {
coleenp@3656 1866 oop anObj = object_at(index);
coleenp@3656 1867 anObj->print_value_on(st);
coleenp@3656 1868 st->print(" {0x%lx}", (address)anObj);
coleenp@3656 1869 } break;
coleenp@3656 1870 case JVM_CONSTANT_Integer :
coleenp@3656 1871 st->print("%d", int_at(index));
coleenp@3656 1872 break;
coleenp@3656 1873 case JVM_CONSTANT_Float :
coleenp@3656 1874 st->print("%f", float_at(index));
coleenp@3656 1875 break;
coleenp@3656 1876 case JVM_CONSTANT_Long :
coleenp@3656 1877 st->print_jlong(long_at(index));
coleenp@3656 1878 break;
coleenp@3656 1879 case JVM_CONSTANT_Double :
coleenp@3656 1880 st->print("%lf", double_at(index));
coleenp@3656 1881 break;
coleenp@3656 1882 case JVM_CONSTANT_NameAndType :
coleenp@3656 1883 st->print("name_index=%d", name_ref_index_at(index));
coleenp@3656 1884 st->print(" signature_index=%d", signature_ref_index_at(index));
coleenp@3656 1885 break;
coleenp@3656 1886 case JVM_CONSTANT_Utf8 :
coleenp@3656 1887 symbol_at(index)->print_value_on(st);
coleenp@3656 1888 break;
coleenp@3656 1889 case JVM_CONSTANT_UnresolvedClass : // fall-through
coleenp@3656 1890 case JVM_CONSTANT_UnresolvedClassInError: {
coleenp@3656 1891 // unresolved_klass_at requires lock or safe world.
coleenp@3656 1892 CPSlot entry = slot_at(index);
coleenp@3656 1893 if (entry.is_resolved()) {
coleenp@3656 1894 entry.get_klass()->print_value_on(st);
coleenp@3656 1895 } else {
coleenp@3656 1896 entry.get_symbol()->print_value_on(st);
coleenp@3656 1897 }
coleenp@3656 1898 }
coleenp@3656 1899 break;
coleenp@3656 1900 case JVM_CONSTANT_MethodHandle :
coleenp@3656 1901 case JVM_CONSTANT_MethodHandleInError :
coleenp@3656 1902 st->print("ref_kind=%d", method_handle_ref_kind_at(index));
coleenp@3656 1903 st->print(" ref_index=%d", method_handle_index_at(index));
coleenp@3656 1904 break;
coleenp@3656 1905 case JVM_CONSTANT_MethodType :
coleenp@3656 1906 case JVM_CONSTANT_MethodTypeInError :
coleenp@3656 1907 st->print("signature_index=%d", method_type_index_at(index));
coleenp@3656 1908 break;
coleenp@3656 1909 case JVM_CONSTANT_InvokeDynamic :
coleenp@3656 1910 {
coleenp@3656 1911 st->print("bootstrap_method_index=%d", invoke_dynamic_bootstrap_method_ref_index_at(index));
coleenp@3656 1912 st->print(" name_and_type_index=%d", invoke_dynamic_name_and_type_ref_index_at(index));
coleenp@3656 1913 int argc = invoke_dynamic_argument_count_at(index);
coleenp@3656 1914 if (argc > 0) {
coleenp@3656 1915 for (int arg_i = 0; arg_i < argc; arg_i++) {
coleenp@3656 1916 int arg = invoke_dynamic_argument_index_at(index, arg_i);
coleenp@3656 1917 st->print((arg_i == 0 ? " arguments={%d" : ", %d"), arg);
coleenp@3656 1918 }
coleenp@3656 1919 st->print("}");
coleenp@3656 1920 }
coleenp@3656 1921 }
coleenp@3656 1922 break;
coleenp@3656 1923 default:
coleenp@3656 1924 ShouldNotReachHere();
coleenp@3656 1925 break;
coleenp@3656 1926 }
coleenp@3656 1927 st->cr();
coleenp@3656 1928 }
coleenp@3656 1929
coleenp@3656 1930 void ConstantPool::print_value_on(outputStream* st) const {
coleenp@3656 1931 assert(is_constantPool(), "must be constantPool");
coleenp@3656 1932 st->print("constant pool [%d]", length());
coleenp@3656 1933 if (has_pseudo_string()) st->print("/pseudo_string");
coleenp@3656 1934 if (has_invokedynamic()) st->print("/invokedynamic");
coleenp@3656 1935 if (has_preresolution()) st->print("/preresolution");
coleenp@3656 1936 if (operands() != NULL) st->print("/operands[%d]", operands()->length());
coleenp@3656 1937 print_address_on(st);
coleenp@3656 1938 st->print(" for ");
coleenp@3656 1939 pool_holder()->print_value_on(st);
coleenp@3656 1940 if (pool_holder() != NULL) {
coleenp@3880 1941 bool extra = (pool_holder()->constants() != this);
coleenp@3656 1942 if (extra) st->print(" (extra)");
coleenp@3656 1943 }
coleenp@3656 1944 if (cache() != NULL) {
coleenp@3656 1945 st->print(" cache=" PTR_FORMAT, cache());
coleenp@3656 1946 }
coleenp@3656 1947 }
coleenp@3656 1948
coleenp@3656 1949
coleenp@3656 1950 // Verification
coleenp@3656 1951
coleenp@3656 1952 void ConstantPool::verify_on(outputStream* st) {
coleenp@3656 1953 guarantee(is_constantPool(), "object must be constant pool");
coleenp@3656 1954 for (int i = 0; i< length(); i++) {
coleenp@3656 1955 constantTag tag = tag_at(i);
coleenp@3656 1956 CPSlot entry = slot_at(i);
coleenp@3656 1957 if (tag.is_klass()) {
coleenp@3656 1958 if (entry.is_resolved()) {
coleenp@3656 1959 guarantee(entry.get_klass()->is_metadata(), "should be metadata");
coleenp@3656 1960 guarantee(entry.get_klass()->is_klass(), "should be klass");
coleenp@3656 1961 }
coleenp@3656 1962 } else if (tag.is_unresolved_klass()) {
coleenp@3656 1963 if (entry.is_resolved()) {
coleenp@3656 1964 guarantee(entry.get_klass()->is_metadata(), "should be metadata");
coleenp@3656 1965 guarantee(entry.get_klass()->is_klass(), "should be klass");
coleenp@3656 1966 }
coleenp@3656 1967 } else if (tag.is_symbol()) {
coleenp@3656 1968 guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count");
coleenp@3656 1969 } else if (tag.is_string()) {
coleenp@3656 1970 guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count");
coleenp@3656 1971 }
coleenp@3656 1972 }
coleenp@3656 1973 if (cache() != NULL) {
coleenp@3656 1974 // Note: cache() can be NULL before a class is completely setup or
coleenp@3656 1975 // in temporary constant pools used during constant pool merging
coleenp@3656 1976 guarantee(cache()->is_metadata(), "should be metadata");
coleenp@3656 1977 guarantee(cache()->is_constantPoolCache(), "should be constant pool cache");
coleenp@3656 1978 }
coleenp@3656 1979 if (pool_holder() != NULL) {
coleenp@3656 1980 // Note: pool_holder() can be NULL in temporary constant pools
coleenp@3656 1981 // used during constant pool merging
coleenp@3656 1982 guarantee(pool_holder()->is_metadata(), "should be metadata");
coleenp@3656 1983 guarantee(pool_holder()->is_klass(), "should be klass");
coleenp@3656 1984 }
coleenp@3656 1985 }
coleenp@3656 1986
coleenp@3656 1987
coleenp@2069 1988 void SymbolHashMap::add_entry(Symbol* sym, u2 value) {
duke@0 1989 char *str = sym->as_utf8();
duke@0 1990 unsigned int hash = compute_hash(str, sym->utf8_length());
duke@0 1991 unsigned int index = hash % table_size();
duke@0 1992
duke@0 1993 // check if already in map
duke@0 1994 // we prefer the first entry since it is more likely to be what was used in
duke@0 1995 // the class file
duke@0 1996 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) {
duke@0 1997 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@0 1998 if (en->hash() == hash && en->symbol() == sym) {
duke@0 1999 return; // already there
duke@0 2000 }
duke@0 2001 }
duke@0 2002
duke@0 2003 SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value);
duke@0 2004 entry->set_next(bucket(index));
duke@0 2005 _buckets[index].set_entry(entry);
duke@0 2006 assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@0 2007 }
duke@0 2008
coleenp@2069 2009 SymbolHashMapEntry* SymbolHashMap::find_entry(Symbol* sym) {
duke@0 2010 assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL");
duke@0 2011 char *str = sym->as_utf8();
duke@0 2012 int len = sym->utf8_length();
duke@0 2013 unsigned int hash = SymbolHashMap::compute_hash(str, len);
duke@0 2014 unsigned int index = hash % table_size();
duke@0 2015 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) {
duke@0 2016 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@0 2017 if (en->hash() == hash && en->symbol() == sym) {
duke@0 2018 return en;
duke@0 2019 }
duke@0 2020 }
duke@0 2021 return NULL;
duke@0 2022 }