annotate src/share/vm/oops/constantPool.cpp @ 3874:4735d2c84362

7200776: Implement default methods in interfaces Summary: Add generic type analysis and default method selection algorithms Reviewed-by: coleenp, acorn
author kamg
date Thu, 11 Oct 2012 12:25:42 -0400
parents 6e5a59a8e4a7
children 18fb7da42534
rev   line source
duke@0 1 /*
brutisso@3067 2 * Copyright (c) 1997, 2012, 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"
stefank@1885 28 #include "classfile/symbolTable.hpp"
stefank@1885 29 #include "classfile/systemDictionary.hpp"
stefank@1885 30 #include "classfile/vmSymbols.hpp"
stefank@1885 31 #include "interpreter/linkResolver.hpp"
coleenp@3656 32 #include "memory/metadataFactory.hpp"
stefank@1885 33 #include "memory/oopFactory.hpp"
coleenp@3656 34 #include "oops/constantPool.hpp"
stefank@1885 35 #include "oops/instanceKlass.hpp"
stefank@1885 36 #include "oops/objArrayKlass.hpp"
coleenp@3656 37 #include "prims/jvmtiRedefineClasses.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@3656 68 // only set to non-zero if constant pool is merged by RedefineClasses
coleenp@3656 69 set_orig_length(0);
coleenp@3656 70 set_lock(new Monitor(Monitor::nonleaf + 2, "A constant pool lock"));
coleenp@3656 71 // all fields are initialized; needed for GC
coleenp@3656 72 set_on_stack(false);
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();
coleenp@3656 98
coleenp@3656 99 delete _lock;
coleenp@3656 100 set_lock(NULL);
coleenp@3656 101 }
coleenp@3656 102
coleenp@3656 103 void ConstantPool::set_flag_at(FlagBit fb) {
jrose@431 104 const int MAX_STATE_CHANGES = 2;
jrose@431 105 for (int i = MAX_STATE_CHANGES + 10; i > 0; i--) {
jrose@431 106 int oflags = _flags;
jrose@431 107 int nflags = oflags | (1 << (int)fb);
jrose@431 108 if (Atomic::cmpxchg(nflags, &_flags, oflags) == oflags)
jrose@431 109 return;
jrose@431 110 }
jrose@431 111 assert(false, "failed to cmpxchg flags");
jrose@431 112 _flags |= (1 << (int)fb); // better than nothing
jrose@431 113 }
jrose@431 114
coleenp@3656 115 objArrayOop ConstantPool::resolved_references() const {
coleenp@3656 116 return (objArrayOop)JNIHandles::resolve(_resolved_references);
coleenp@3656 117 }
coleenp@3656 118
coleenp@3656 119 // Create resolved_references array and mapping array for original cp indexes
coleenp@3656 120 // The ldc bytecode was rewritten to have the resolved reference array index so need a way
coleenp@3656 121 // to map it back for resolving and some unlikely miscellaneous uses.
coleenp@3656 122 // The objects created by invokedynamic are appended to this list.
coleenp@3656 123 void ConstantPool::initialize_resolved_references(ClassLoaderData* loader_data,
coleenp@3656 124 intStack reference_map,
coleenp@3656 125 int constant_pool_map_length,
coleenp@3656 126 TRAPS) {
coleenp@3656 127 // Initialized the resolved object cache.
coleenp@3656 128 int map_length = reference_map.length();
coleenp@3656 129 if (map_length > 0) {
coleenp@3656 130 // Only need mapping back to constant pool entries. The map isn't used for
coleenp@3656 131 // invokedynamic resolved_reference entries. The constant pool cache index
coleenp@3656 132 // has the mapping back to both the constant pool and to the resolved
coleenp@3656 133 // reference index.
coleenp@3656 134 if (constant_pool_map_length > 0) {
coleenp@3656 135 Array<u2>* om = MetadataFactory::new_array<u2>(loader_data, map_length, CHECK);
coleenp@3656 136
coleenp@3656 137 for (int i = 0; i < constant_pool_map_length; i++) {
coleenp@3656 138 int x = reference_map.at(i);
coleenp@3656 139 assert(x == (int)(jushort) x, "klass index is too big");
coleenp@3656 140 om->at_put(i, (jushort)x);
coleenp@3656 141 }
coleenp@3656 142 set_reference_map(om);
coleenp@3656 143 }
coleenp@3656 144
coleenp@3656 145 // Create Java array for holding resolved strings, methodHandles,
coleenp@3656 146 // methodTypes, invokedynamic and invokehandle appendix objects, etc.
coleenp@3656 147 objArrayOop stom = oopFactory::new_objArray(SystemDictionary::Object_klass(), map_length, CHECK);
coleenp@3656 148 Handle refs_handle (THREAD, (oop)stom); // must handleize.
coleenp@3656 149 set_resolved_references(loader_data->add_handle(refs_handle));
coleenp@3656 150 }
coleenp@3656 151 }
coleenp@3656 152
coleenp@3656 153 // CDS support. Create a new resolved_references array.
coleenp@3656 154 void ConstantPool::restore_unshareable_info(TRAPS) {
coleenp@3664 155
coleenp@3664 156 // restore the C++ vtable from the shared archive
coleenp@3664 157 restore_vtable();
coleenp@3664 158
coleenp@3656 159 if (SystemDictionary::Object_klass_loaded()) {
coleenp@3656 160 // Recreate the object array and add to ClassLoaderData.
coleenp@3656 161 int map_length = resolved_reference_length();
coleenp@3656 162 if (map_length > 0) {
coleenp@3656 163 objArrayOop stom = oopFactory::new_objArray(SystemDictionary::Object_klass(), map_length, CHECK);
coleenp@3656 164 Handle refs_handle (THREAD, (oop)stom); // must handleize.
coleenp@3656 165
coleenp@3656 166 ClassLoaderData* loader_data = pool_holder()->class_loader_data();
coleenp@3656 167 set_resolved_references(loader_data->add_handle(refs_handle));
coleenp@3656 168 }
coleenp@3656 169
coleenp@3656 170 // Also need to recreate the mutex. Make sure this matches the constructor
coleenp@3656 171 set_lock(new Monitor(Monitor::nonleaf + 2, "A constant pool lock"));
coleenp@3656 172 }
coleenp@3656 173 }
coleenp@3656 174
coleenp@3656 175 void ConstantPool::remove_unshareable_info() {
coleenp@3656 176 // Resolved references are not in the shared archive.
coleenp@3656 177 // Save the length for restoration. It is not necessarily the same length
coleenp@3656 178 // as reference_map.length() if invokedynamic is saved.
coleenp@3656 179 set_resolved_reference_length(
coleenp@3656 180 resolved_references() != NULL ? resolved_references()->length() : 0);
coleenp@3656 181 set_resolved_references(NULL);
coleenp@3656 182 set_lock(NULL);
coleenp@3656 183 }
coleenp@3656 184
coleenp@3656 185 int ConstantPool::cp_to_object_index(int cp_index) {
coleenp@3656 186 // this is harder don't do this so much.
coleenp@3656 187 for (int i = 0; i< reference_map()->length(); i++) {
coleenp@3656 188 if (reference_map()->at(i) == cp_index) return i;
coleenp@3656 189 // Zero entry is divider between constant pool indices for strings,
coleenp@3656 190 // method handles and method types. After that the index is a constant
coleenp@3656 191 // pool cache index for invokedynamic. Stop when zero (which can never
coleenp@3656 192 // be a constant pool index)
coleenp@3656 193 if (reference_map()->at(i) == 0) break;
coleenp@3656 194 }
coleenp@3656 195 // We might not find the index.
coleenp@3656 196 return _no_index_sentinel;
coleenp@3656 197 }
coleenp@3656 198
coleenp@3656 199 Klass* ConstantPool::klass_at_impl(constantPoolHandle this_oop, int which, TRAPS) {
coleenp@3656 200 // A resolved constantPool entry will contain a Klass*, otherwise a Symbol*.
duke@0 201 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and
duke@0 202 // tag is not updated atomicly.
coleenp@3656 203
coleenp@2069 204 CPSlot entry = this_oop->slot_at(which);
coleenp@3656 205 if (entry.is_resolved()) {
coleenp@3656 206 assert(entry.get_klass()->is_klass(), "must be");
duke@0 207 // Already resolved - return entry.
coleenp@3656 208 return entry.get_klass();
duke@0 209 }
duke@0 210
duke@0 211 // Acquire lock on constant oop while doing update. After we get the lock, we check if another object
duke@0 212 // already has updated the object
duke@0 213 assert(THREAD->is_Java_thread(), "must be a Java thread");
duke@0 214 bool do_resolve = false;
duke@0 215 bool in_error = false;
duke@0 216
coleenp@3656 217 // Create a handle for the mirror. This will preserve the resolved class
coleenp@3656 218 // until the loader_data is registered.
coleenp@3656 219 Handle mirror_handle;
coleenp@3656 220
coleenp@2069 221 Symbol* name = NULL;
duke@0 222 Handle loader;
coleenp@3656 223 { MonitorLockerEx ml(this_oop->lock());
duke@0 224
duke@0 225 if (this_oop->tag_at(which).is_unresolved_klass()) {
duke@0 226 if (this_oop->tag_at(which).is_unresolved_klass_in_error()) {
duke@0 227 in_error = true;
duke@0 228 } else {
duke@0 229 do_resolve = true;
coleenp@2069 230 name = this_oop->unresolved_klass_at(which);
coleenp@3656 231 loader = Handle(THREAD, InstanceKlass::cast(this_oop->pool_holder())->class_loader());
duke@0 232 }
duke@0 233 }
duke@0 234 } // unlocking constantPool
duke@0 235
duke@0 236
duke@0 237 // The original attempt to resolve this constant pool entry failed so find the
duke@0 238 // original error and throw it again (JVMS 5.4.3).
duke@0 239 if (in_error) {
coleenp@2069 240 Symbol* error = SystemDictionary::find_resolution_error(this_oop, which);
coleenp@2069 241 guarantee(error != (Symbol*)NULL, "tag mismatch with resolution error table");
duke@0 242 ResourceMark rm;
duke@0 243 // exception text will be the class name
duke@0 244 const char* className = this_oop->unresolved_klass_at(which)->as_C_string();
duke@0 245 THROW_MSG_0(error, className);
duke@0 246 }
duke@0 247
duke@0 248 if (do_resolve) {
duke@0 249 // this_oop must be unlocked during resolve_or_fail
duke@0 250 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain();
duke@0 251 Handle h_prot (THREAD, protection_domain);
coleenp@3656 252 Klass* k_oop = SystemDictionary::resolve_or_fail(name, loader, h_prot, true, THREAD);
duke@0 253 KlassHandle k;
duke@0 254 if (!HAS_PENDING_EXCEPTION) {
duke@0 255 k = KlassHandle(THREAD, k_oop);
coleenp@3656 256 // preserve the resolved klass.
coleenp@3656 257 mirror_handle = Handle(THREAD, k_oop->java_mirror());
duke@0 258 // Do access check for klasses
duke@0 259 verify_constant_pool_resolve(this_oop, k, THREAD);
duke@0 260 }
duke@0 261
duke@0 262 // Failed to resolve class. We must record the errors so that subsequent attempts
duke@0 263 // to resolve this constant pool entry fail with the same error (JVMS 5.4.3).
duke@0 264 if (HAS_PENDING_EXCEPTION) {
duke@0 265 ResourceMark rm;
coleenp@3656 266 Symbol* error = PENDING_EXCEPTION->klass()->name();
duke@0 267
duke@0 268 bool throw_orig_error = false;
duke@0 269 {
coleenp@3656 270 MonitorLockerEx ml(this_oop->lock());
duke@0 271
duke@0 272 // some other thread has beaten us and has resolved the class.
duke@0 273 if (this_oop->tag_at(which).is_klass()) {
duke@0 274 CLEAR_PENDING_EXCEPTION;
duke@0 275 entry = this_oop->resolved_klass_at(which);
coleenp@3656 276 return entry.get_klass();
duke@0 277 }
duke@0 278
duke@0 279 if (!PENDING_EXCEPTION->
never@1142 280 is_a(SystemDictionary::LinkageError_klass())) {
duke@0 281 // Just throw the exception and don't prevent these classes from
duke@0 282 // being loaded due to virtual machine errors like StackOverflow
duke@0 283 // and OutOfMemoryError, etc, or if the thread was hit by stop()
duke@0 284 // Needs clarification to section 5.4.3 of the VM spec (see 6308271)
duke@0 285 }
duke@0 286 else if (!this_oop->tag_at(which).is_unresolved_klass_in_error()) {
duke@0 287 SystemDictionary::add_resolution_error(this_oop, which, error);
duke@0 288 this_oop->tag_at_put(which, JVM_CONSTANT_UnresolvedClassInError);
duke@0 289 } else {
duke@0 290 // some other thread has put the class in error state.
coleenp@2069 291 error = SystemDictionary::find_resolution_error(this_oop, which);
coleenp@2069 292 assert(error != NULL, "checking");
duke@0 293 throw_orig_error = true;
duke@0 294 }
duke@0 295 } // unlocked
duke@0 296
duke@0 297 if (throw_orig_error) {
duke@0 298 CLEAR_PENDING_EXCEPTION;
duke@0 299 ResourceMark rm;
duke@0 300 const char* className = this_oop->unresolved_klass_at(which)->as_C_string();
duke@0 301 THROW_MSG_0(error, className);
duke@0 302 }
duke@0 303
duke@0 304 return 0;
duke@0 305 }
duke@0 306
coleenp@3656 307 if (TraceClassResolution && !k()->oop_is_array()) {
duke@0 308 // skip resolving the constant pool so that this code get's
duke@0 309 // called the next time some bytecodes refer to this class.
duke@0 310 ResourceMark rm;
duke@0 311 int line_number = -1;
duke@0 312 const char * source_file = NULL;
duke@0 313 if (JavaThread::current()->has_last_Java_frame()) {
duke@0 314 // try to identify the method which called this function.
duke@0 315 vframeStream vfst(JavaThread::current());
duke@0 316 if (!vfst.at_end()) {
duke@0 317 line_number = vfst.method()->line_number_from_bci(vfst.bci());
coleenp@3656 318 Symbol* s = InstanceKlass::cast(vfst.method()->method_holder())->source_file_name();
duke@0 319 if (s != NULL) {
duke@0 320 source_file = s->as_C_string();
duke@0 321 }
duke@0 322 }
duke@0 323 }
duke@0 324 if (k() != this_oop->pool_holder()) {
duke@0 325 // only print something if the classes are different
duke@0 326 if (source_file != NULL) {
duke@0 327 tty->print("RESOLVE %s %s %s:%d\n",
coleenp@3656 328 InstanceKlass::cast(this_oop->pool_holder())->external_name(),
coleenp@3656 329 InstanceKlass::cast(k())->external_name(), source_file, line_number);
duke@0 330 } else {
duke@0 331 tty->print("RESOLVE %s %s\n",
coleenp@3656 332 InstanceKlass::cast(this_oop->pool_holder())->external_name(),
coleenp@3656 333 InstanceKlass::cast(k())->external_name());
duke@0 334 }
duke@0 335 }
duke@0 336 return k();
duke@0 337 } else {
coleenp@3656 338 MonitorLockerEx ml(this_oop->lock());
duke@0 339 // Only updated constant pool - if it is resolved.
duke@0 340 do_resolve = this_oop->tag_at(which).is_unresolved_klass();
duke@0 341 if (do_resolve) {
coleenp@3656 342 ClassLoaderData* this_key = InstanceKlass::cast(this_oop->pool_holder())->class_loader_data();
coleenp@3656 343 if (!this_key->is_the_null_class_loader_data()) {
coleenp@3656 344 this_key->record_dependency(k(), CHECK_NULL); // Can throw OOM
coleenp@3656 345 }
duke@0 346 this_oop->klass_at_put(which, k());
duke@0 347 }
duke@0 348 }
duke@0 349 }
duke@0 350
duke@0 351 entry = this_oop->resolved_klass_at(which);
coleenp@3656 352 assert(entry.is_resolved() && entry.get_klass()->is_klass(), "must be resolved at this point");
coleenp@3656 353 return entry.get_klass();
duke@0 354 }
duke@0 355
duke@0 356
coleenp@3656 357 // Does not update ConstantPool* - to avoid any exception throwing. Used
duke@0 358 // by compiler and exception handling. Also used to avoid classloads for
duke@0 359 // instanceof operations. Returns NULL if the class has not been loaded or
duke@0 360 // if the verification of constant pool failed
coleenp@3656 361 Klass* ConstantPool::klass_at_if_loaded(constantPoolHandle this_oop, int which) {
coleenp@2069 362 CPSlot entry = this_oop->slot_at(which);
coleenp@3656 363 if (entry.is_resolved()) {
coleenp@3656 364 assert(entry.get_klass()->is_klass(), "must be");
coleenp@3656 365 return entry.get_klass();
duke@0 366 } else {
coleenp@3656 367 assert(entry.is_unresolved(), "must be either symbol or klass");
duke@0 368 Thread *thread = Thread::current();
coleenp@2069 369 Symbol* name = entry.get_symbol();
coleenp@3656 370 oop loader = InstanceKlass::cast(this_oop->pool_holder())->class_loader();
duke@0 371 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain();
duke@0 372 Handle h_prot (thread, protection_domain);
duke@0 373 Handle h_loader (thread, loader);
coleenp@3656 374 Klass* k = SystemDictionary::find(name, h_loader, h_prot, thread);
duke@0 375
duke@0 376 if (k != NULL) {
duke@0 377 // Make sure that resolving is legal
duke@0 378 EXCEPTION_MARK;
duke@0 379 KlassHandle klass(THREAD, k);
duke@0 380 // return NULL if verification fails
duke@0 381 verify_constant_pool_resolve(this_oop, klass, THREAD);
duke@0 382 if (HAS_PENDING_EXCEPTION) {
duke@0 383 CLEAR_PENDING_EXCEPTION;
duke@0 384 return NULL;
duke@0 385 }
duke@0 386 return klass();
duke@0 387 } else {
duke@0 388 return k;
duke@0 389 }
duke@0 390 }
duke@0 391 }
duke@0 392
duke@0 393
coleenp@3656 394 Klass* ConstantPool::klass_ref_at_if_loaded(constantPoolHandle this_oop, int which) {
duke@0 395 return klass_at_if_loaded(this_oop, this_oop->klass_ref_index_at(which));
duke@0 396 }
duke@0 397
duke@0 398
duke@0 399 // This is an interface for the compiler that allows accessing non-resolved entries
duke@0 400 // in the constant pool - but still performs the validations tests. Must be used
duke@0 401 // in a pre-parse of the compiler - to determine what it can do and not do.
duke@0 402 // Note: We cannot update the ConstantPool from the vm_thread.
coleenp@3656 403 Klass* ConstantPool::klass_ref_at_if_loaded_check(constantPoolHandle this_oop, int index, TRAPS) {
duke@0 404 int which = this_oop->klass_ref_index_at(index);
coleenp@2069 405 CPSlot entry = this_oop->slot_at(which);
coleenp@3656 406 if (entry.is_resolved()) {
coleenp@3656 407 assert(entry.get_klass()->is_klass(), "must be");
coleenp@3656 408 return entry.get_klass();
duke@0 409 } else {
coleenp@3656 410 assert(entry.is_unresolved(), "must be either symbol or klass");
coleenp@2069 411 Symbol* name = entry.get_symbol();
coleenp@3656 412 oop loader = InstanceKlass::cast(this_oop->pool_holder())->class_loader();
duke@0 413 oop protection_domain = Klass::cast(this_oop->pool_holder())->protection_domain();
duke@0 414 Handle h_loader(THREAD, loader);
duke@0 415 Handle h_prot (THREAD, protection_domain);
duke@0 416 KlassHandle k(THREAD, SystemDictionary::find(name, h_loader, h_prot, THREAD));
duke@0 417
duke@0 418 // Do access check for klasses
duke@0 419 if( k.not_null() ) verify_constant_pool_resolve(this_oop, k, CHECK_NULL);
duke@0 420 return k();
duke@0 421 }
duke@0 422 }
duke@0 423
duke@0 424
coleenp@3656 425 Method* ConstantPool::method_at_if_loaded(constantPoolHandle cpool,
twisti@3582 426 int which) {
brutisso@3067 427 if (cpool->cache() == NULL) return NULL; // nothing to load yet
coleenp@3656 428 int cache_index = decode_cpcache_index(which, true);
jrose@2557 429 if (!(cache_index >= 0 && cache_index < cpool->cache()->length())) {
coleenp@3656 430 // FIXME: should be an assert
jrose@2557 431 if (PrintMiscellaneous && (Verbose||WizardMode)) {
twisti@3582 432 tty->print_cr("bad operand %d in:", which); cpool->print();
jrose@2557 433 }
jrose@2557 434 return NULL;
jrose@2557 435 }
jrose@2557 436 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
twisti@3582 437 return e->method_if_resolved(cpool);
twisti@3582 438 }
twisti@3582 439
twisti@3582 440
coleenp@3656 441 bool ConstantPool::has_appendix_at_if_loaded(constantPoolHandle cpool, int which) {
twisti@3582 442 if (cpool->cache() == NULL) return false; // nothing to load yet
coleenp@3656 443 int cache_index = decode_cpcache_index(which, true);
coleenp@3656 444 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
twisti@3582 445 return e->has_appendix();
twisti@3582 446 }
twisti@3582 447
coleenp@3656 448 oop ConstantPool::appendix_at_if_loaded(constantPoolHandle cpool, int which) {
twisti@3582 449 if (cpool->cache() == NULL) return NULL; // nothing to load yet
coleenp@3656 450 int cache_index = decode_cpcache_index(which, true);
coleenp@3656 451 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
coleenp@3656 452 return e->appendix_if_resolved(cpool);
jrose@2557 453 }
jrose@2557 454
jrose@2557 455
twisti@3753 456 bool ConstantPool::has_method_type_at_if_loaded(constantPoolHandle cpool, int which) {
twisti@3753 457 if (cpool->cache() == NULL) return false; // nothing to load yet
twisti@3753 458 int cache_index = decode_cpcache_index(which, true);
twisti@3753 459 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
twisti@3753 460 return e->has_method_type();
twisti@3753 461 }
twisti@3753 462
twisti@3753 463 oop ConstantPool::method_type_at_if_loaded(constantPoolHandle cpool, int which) {
twisti@3753 464 if (cpool->cache() == NULL) return NULL; // nothing to load yet
twisti@3753 465 int cache_index = decode_cpcache_index(which, true);
twisti@3753 466 ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index);
twisti@3753 467 return e->method_type_if_resolved(cpool);
twisti@3753 468 }
twisti@3753 469
twisti@3753 470
coleenp@3656 471 Symbol* ConstantPool::impl_name_ref_at(int which, bool uncached) {
jrose@726 472 int name_index = name_ref_index_at(impl_name_and_type_ref_index_at(which, uncached));
duke@0 473 return symbol_at(name_index);
duke@0 474 }
duke@0 475
duke@0 476
coleenp@3656 477 Symbol* ConstantPool::impl_signature_ref_at(int which, bool uncached) {
jrose@726 478 int signature_index = signature_ref_index_at(impl_name_and_type_ref_index_at(which, uncached));
duke@0 479 return symbol_at(signature_index);
duke@0 480 }
duke@0 481
duke@0 482
coleenp@3656 483 int ConstantPool::impl_name_and_type_ref_index_at(int which, bool uncached) {
jrose@1059 484 int i = which;
jrose@1059 485 if (!uncached && cache() != NULL) {
coleenp@3656 486 if (ConstantPool::is_invokedynamic_index(which)) {
coleenp@3656 487 // Invokedynamic index is index into resolved_references
coleenp@3656 488 int pool_index = invokedynamic_cp_cache_entry_at(which)->constant_pool_index();
jrose@2316 489 pool_index = invoke_dynamic_name_and_type_ref_index_at(pool_index);
jrose@1583 490 assert(tag_at(pool_index).is_name_and_type(), "");
jrose@1583 491 return pool_index;
jrose@1583 492 }
jrose@1059 493 // change byte-ordering and go via cache
jrose@1059 494 i = remap_instruction_operand_from_cache(which);
jrose@1059 495 } else {
jrose@1838 496 if (tag_at(which).is_invoke_dynamic()) {
jrose@1838 497 int pool_index = invoke_dynamic_name_and_type_ref_index_at(which);
jrose@1838 498 assert(tag_at(pool_index).is_name_and_type(), "");
jrose@1838 499 return pool_index;
jrose@1838 500 }
jrose@1059 501 }
jrose@1059 502 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool");
jrose@1838 503 assert(!tag_at(i).is_invoke_dynamic(), "Must be handled above");
jrose@1059 504 jint ref_index = *int_at_addr(i);
duke@0 505 return extract_high_short_from_int(ref_index);
duke@0 506 }
duke@0 507
duke@0 508
coleenp@3656 509 int ConstantPool::impl_klass_ref_index_at(int which, bool uncached) {
coleenp@3656 510 guarantee(!ConstantPool::is_invokedynamic_index(which),
jrose@1059 511 "an invokedynamic instruction does not have a klass");
jrose@1059 512 int i = which;
jrose@1059 513 if (!uncached && cache() != NULL) {
jrose@1059 514 // change byte-ordering and go via cache
jrose@1059 515 i = remap_instruction_operand_from_cache(which);
jrose@1059 516 }
jrose@1059 517 assert(tag_at(i).is_field_or_method(), "Corrupted constant pool");
jrose@1059 518 jint ref_index = *int_at_addr(i);
duke@0 519 return extract_low_short_from_int(ref_index);
duke@0 520 }
duke@0 521
duke@0 522
jrose@726 523
coleenp@3656 524 int ConstantPool::remap_instruction_operand_from_cache(int operand) {
jrose@1486 525 int cpc_index = operand;
jrose@1486 526 DEBUG_ONLY(cpc_index -= CPCACHE_INDEX_TAG);
jrose@1486 527 assert((int)(u2)cpc_index == cpc_index, "clean u2");
jrose@1059 528 int member_index = cache()->entry_at(cpc_index)->constant_pool_index();
jrose@1059 529 return member_index;
jrose@726 530 }
jrose@726 531
jrose@726 532
coleenp@3656 533 void ConstantPool::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) {
duke@0 534 if (k->oop_is_instance() || k->oop_is_objArray()) {
duke@0 535 instanceKlassHandle holder (THREAD, this_oop->pool_holder());
coleenp@3764 536 Klass* elem_oop = k->oop_is_instance() ? k() : ObjArrayKlass::cast(k())->bottom_klass();
duke@0 537 KlassHandle element (THREAD, elem_oop);
duke@0 538
duke@0 539 // The element type could be a typeArray - we only need the access check if it is
duke@0 540 // an reference to another class
duke@0 541 if (element->oop_is_instance()) {
duke@0 542 LinkResolver::check_klass_accessability(holder, element, CHECK);
duke@0 543 }
duke@0 544 }
duke@0 545 }
duke@0 546
duke@0 547
coleenp@3656 548 int ConstantPool::name_ref_index_at(int which_nt) {
jrose@726 549 jint ref_index = name_and_type_at(which_nt);
duke@0 550 return extract_low_short_from_int(ref_index);
duke@0 551 }
duke@0 552
duke@0 553
coleenp@3656 554 int ConstantPool::signature_ref_index_at(int which_nt) {
jrose@726 555 jint ref_index = name_and_type_at(which_nt);
duke@0 556 return extract_high_short_from_int(ref_index);
duke@0 557 }
duke@0 558
duke@0 559
coleenp@3656 560 Klass* ConstantPool::klass_ref_at(int which, TRAPS) {
duke@0 561 return klass_at(klass_ref_index_at(which), CHECK_NULL);
duke@0 562 }
duke@0 563
duke@0 564
coleenp@3656 565 Symbol* ConstantPool::klass_name_at(int which) {
duke@0 566 assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(),
duke@0 567 "Corrupted constant pool");
coleenp@3656 568 // A resolved constantPool entry will contain a Klass*, otherwise a Symbol*.
duke@0 569 // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and
duke@0 570 // tag is not updated atomicly.
coleenp@2069 571 CPSlot entry = slot_at(which);
coleenp@3656 572 if (entry.is_resolved()) {
duke@0 573 // Already resolved - return entry's name.
coleenp@3656 574 assert(entry.get_klass()->is_klass(), "must be");
coleenp@3656 575 return entry.get_klass()->name();
duke@0 576 } else {
coleenp@3656 577 assert(entry.is_unresolved(), "must be either symbol or klass");
coleenp@2069 578 return entry.get_symbol();
duke@0 579 }
duke@0 580 }
duke@0 581
coleenp@3656 582 Symbol* ConstantPool::klass_ref_at_noresolve(int which) {
duke@0 583 jint ref_index = klass_ref_index_at(which);
duke@0 584 return klass_at_noresolve(ref_index);
duke@0 585 }
duke@0 586
coleenp@3656 587 Symbol* ConstantPool::uncached_klass_ref_at_noresolve(int which) {
jrose@1524 588 jint ref_index = uncached_klass_ref_index_at(which);
jrose@1524 589 return klass_at_noresolve(ref_index);
jrose@1524 590 }
jrose@1524 591
coleenp@3656 592 char* ConstantPool::string_at_noresolve(int which) {
coleenp@3656 593 Symbol* s = unresolved_string_at(which);
coleenp@3656 594 if (s == NULL) {
coleenp@3656 595 return (char*)"<pseudo-string>";
duke@0 596 } else {
coleenp@3656 597 return unresolved_string_at(which)->as_C_string();
duke@0 598 }
duke@0 599 }
duke@0 600
coleenp@3656 601 BasicType ConstantPool::basic_type_for_signature_at(int which) {
duke@0 602 return FieldType::basic_type(symbol_at(which));
duke@0 603 }
duke@0 604
duke@0 605
coleenp@3656 606 void ConstantPool::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) {
duke@0 607 for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused
coleenp@3656 608 if (this_oop->tag_at(index).is_string()) {
duke@0 609 this_oop->string_at(index, CHECK);
duke@0 610 }
duke@0 611 }
duke@0 612 }
duke@0 613
coleenp@3656 614 // Resolve all the classes in the constant pool. If they are all resolved,
coleenp@3656 615 // the constant pool is read-only. Enhancement: allocate cp entries to
coleenp@3656 616 // another metaspace, and copy to read-only or read-write space if this
coleenp@3656 617 // bit is set.
coleenp@3656 618 bool ConstantPool::resolve_class_constants(TRAPS) {
coleenp@3656 619 constantPoolHandle cp(THREAD, this);
coleenp@3656 620 for (int index = 1; index < length(); index++) { // Index 0 is unused
coleenp@3656 621 if (tag_at(index).is_unresolved_klass() &&
coleenp@3656 622 klass_at_if_loaded(cp, index) == NULL) {
coleenp@3656 623 return false;
jrose@1838 624 }
coleenp@3656 625 }
coleenp@3656 626 // set_preresolution(); or some bit for future use
coleenp@3656 627 return true;
jrose@1838 628 }
jrose@1838 629
coleenp@3656 630 // If resolution for MethodHandle or MethodType fails, save the exception
coleenp@3656 631 // in the resolution error table, so that the same exception is thrown again.
coleenp@3656 632 void ConstantPool::save_and_throw_exception(constantPoolHandle this_oop, int which,
coleenp@3656 633 int tag, TRAPS) {
coleenp@3656 634 ResourceMark rm;
coleenp@3656 635 Symbol* error = PENDING_EXCEPTION->klass()->name();
coleenp@3656 636 MonitorLockerEx ml(this_oop->lock()); // lock cpool to change tag.
coleenp@3656 637
coleenp@3656 638 int error_tag = (tag == JVM_CONSTANT_MethodHandle) ?
coleenp@3656 639 JVM_CONSTANT_MethodHandleInError : JVM_CONSTANT_MethodTypeInError;
coleenp@3656 640
coleenp@3656 641 if (!PENDING_EXCEPTION->
coleenp@3656 642 is_a(SystemDictionary::LinkageError_klass())) {
coleenp@3656 643 // Just throw the exception and don't prevent these classes from
coleenp@3656 644 // being loaded due to virtual machine errors like StackOverflow
coleenp@3656 645 // and OutOfMemoryError, etc, or if the thread was hit by stop()
coleenp@3656 646 // Needs clarification to section 5.4.3 of the VM spec (see 6308271)
coleenp@3656 647
coleenp@3656 648 } else if (this_oop->tag_at(which).value() != error_tag) {
coleenp@3656 649 SystemDictionary::add_resolution_error(this_oop, which, error);
coleenp@3656 650 this_oop->tag_at_put(which, error_tag);
coleenp@3656 651 } else {
coleenp@3656 652 // some other thread has put the class in error state.
coleenp@3656 653 error = SystemDictionary::find_resolution_error(this_oop, which);
coleenp@3656 654 assert(error != NULL, "checking");
coleenp@3656 655 CLEAR_PENDING_EXCEPTION;
coleenp@3656 656 THROW_MSG(error, "");
coleenp@3656 657 }
coleenp@3656 658 }
coleenp@3656 659
coleenp@3656 660
coleenp@3656 661 // Called to resolve constants in the constant pool and return an oop.
coleenp@3656 662 // Some constant pool entries cache their resolved oop. This is also
coleenp@3656 663 // called to create oops from constants to use in arguments for invokedynamic
coleenp@3656 664 oop ConstantPool::resolve_constant_at_impl(constantPoolHandle this_oop, int index, int cache_index, TRAPS) {
jrose@1524 665 oop result_oop = NULL;
jrose@1838 666 Handle throw_exception;
jrose@1838 667
jrose@1838 668 if (cache_index == _possible_index_sentinel) {
coleenp@3656 669 // It is possible that this constant is one which is cached in the objects.
jrose@1838 670 // We'll do a linear search. This should be OK because this usage is rare.
jrose@1838 671 assert(index > 0, "valid index");
coleenp@3656 672 cache_index = this_oop->cp_to_object_index(index);
jrose@1838 673 }
jrose@1838 674 assert(cache_index == _no_index_sentinel || cache_index >= 0, "");
jrose@1838 675 assert(index == _no_index_sentinel || index >= 0, "");
jrose@1838 676
jrose@1524 677 if (cache_index >= 0) {
coleenp@3656 678 result_oop = this_oop->resolved_references()->obj_at(cache_index);
jrose@1524 679 if (result_oop != NULL) {
coleenp@3656 680 return result_oop;
jrose@1838 681 // That was easy...
jrose@1524 682 }
coleenp@3656 683 index = this_oop->object_to_cp_index(cache_index);
jrose@1524 684 }
jrose@1524 685
jrose@1838 686 jvalue prim_value; // temp used only in a few cases below
jrose@1838 687
jrose@1524 688 int tag_value = this_oop->tag_at(index).value();
coleenp@3656 689
jrose@1524 690 switch (tag_value) {
jrose@1524 691
jrose@1524 692 case JVM_CONSTANT_UnresolvedClass:
jrose@1524 693 case JVM_CONSTANT_UnresolvedClassInError:
jrose@1524 694 case JVM_CONSTANT_Class:
jrose@1524 695 {
coleenp@3656 696 assert(cache_index == _no_index_sentinel, "should not have been set");
coleenp@3656 697 Klass* resolved = klass_at_impl(this_oop, index, CHECK_NULL);
jrose@1524 698 // ldc wants the java mirror.
never@2231 699 result_oop = resolved->java_mirror();
jrose@1524 700 break;
jrose@1524 701 }
jrose@1524 702
jrose@1524 703 case JVM_CONSTANT_String:
coleenp@3656 704 assert(cache_index != _no_index_sentinel, "should have been set");
jrose@1524 705 if (this_oop->is_pseudo_string_at(index)) {
coleenp@3656 706 result_oop = this_oop->pseudo_string_at(index, cache_index);
jrose@1524 707 break;
jrose@1524 708 }
coleenp@3656 709 result_oop = string_at_impl(this_oop, index, cache_index, CHECK_NULL);
jrose@1524 710 break;
jrose@1524 711
jrose@1524 712 case JVM_CONSTANT_Object:
jrose@1524 713 result_oop = this_oop->object_at(index);
jrose@1524 714 break;
jrose@1524 715
coleenp@3656 716 case JVM_CONSTANT_MethodHandleInError:
coleenp@3656 717 case JVM_CONSTANT_MethodTypeInError:
coleenp@3656 718 {
coleenp@3656 719 Symbol* error = SystemDictionary::find_resolution_error(this_oop, index);
coleenp@3656 720 guarantee(error != (Symbol*)NULL, "tag mismatch with resolution error table");
coleenp@3656 721 ResourceMark rm;
coleenp@3656 722 THROW_MSG_0(error, "");
coleenp@3656 723 break;
coleenp@3656 724 }
coleenp@3656 725
jrose@1524 726 case JVM_CONSTANT_MethodHandle:
jrose@1524 727 {
jrose@1524 728 int ref_kind = this_oop->method_handle_ref_kind_at(index);
jrose@1524 729 int callee_index = this_oop->method_handle_klass_index_at(index);
coleenp@2069 730 Symbol* name = this_oop->method_handle_name_ref_at(index);
coleenp@2069 731 Symbol* signature = this_oop->method_handle_signature_ref_at(index);
jrose@1524 732 if (PrintMiscellaneous)
jrose@1524 733 tty->print_cr("resolve JVM_CONSTANT_MethodHandle:%d [%d/%d/%d] %s.%s",
jrose@1524 734 ref_kind, index, this_oop->method_handle_index_at(index),
jrose@1524 735 callee_index, name->as_C_string(), signature->as_C_string());
jrose@1524 736 KlassHandle callee;
coleenp@3656 737 { Klass* k = klass_at_impl(this_oop, callee_index, CHECK_NULL);
jrose@1524 738 callee = KlassHandle(THREAD, k);
jrose@1524 739 }
jrose@1524 740 KlassHandle klass(THREAD, this_oop->pool_holder());
jrose@1524 741 Handle value = SystemDictionary::link_method_handle_constant(klass, ref_kind,
jrose@1524 742 callee, name, signature,
jrose@1838 743 THREAD);
coleenp@3656 744 result_oop = value();
jrose@1838 745 if (HAS_PENDING_EXCEPTION) {
coleenp@3656 746 save_and_throw_exception(this_oop, index, tag_value, CHECK_NULL);
jrose@1838 747 }
jrose@1524 748 break;
jrose@1524 749 }
jrose@1524 750
jrose@1524 751 case JVM_CONSTANT_MethodType:
jrose@1524 752 {
coleenp@2069 753 Symbol* signature = this_oop->method_type_signature_at(index);
jrose@1524 754 if (PrintMiscellaneous)
jrose@1524 755 tty->print_cr("resolve JVM_CONSTANT_MethodType [%d/%d] %s",
jrose@1524 756 index, this_oop->method_type_index_at(index),
jrose@1524 757 signature->as_C_string());
jrose@1524 758 KlassHandle klass(THREAD, this_oop->pool_holder());
twisti@3582 759 Handle value = SystemDictionary::find_method_handle_type(signature, klass, THREAD);
coleenp@3656 760 result_oop = value();
jrose@1838 761 if (HAS_PENDING_EXCEPTION) {
coleenp@3656 762 save_and_throw_exception(this_oop, index, tag_value, CHECK_NULL);
jrose@1838 763 }
jrose@1524 764 break;
jrose@1524 765 }
jrose@1524 766
jrose@1524 767 case JVM_CONSTANT_Integer:
coleenp@3656 768 assert(cache_index == _no_index_sentinel, "should not have been set");
jrose@1838 769 prim_value.i = this_oop->int_at(index);
jrose@1838 770 result_oop = java_lang_boxing_object::create(T_INT, &prim_value, CHECK_NULL);
jrose@1838 771 break;
jrose@1838 772
jrose@1524 773 case JVM_CONSTANT_Float:
coleenp@3656 774 assert(cache_index == _no_index_sentinel, "should not have been set");
jrose@1838 775 prim_value.f = this_oop->float_at(index);
jrose@1838 776 result_oop = java_lang_boxing_object::create(T_FLOAT, &prim_value, CHECK_NULL);
jrose@1838 777 break;
jrose@1838 778
jrose@1524 779 case JVM_CONSTANT_Long:
coleenp@3656 780 assert(cache_index == _no_index_sentinel, "should not have been set");
jrose@1838 781 prim_value.j = this_oop->long_at(index);
jrose@1838 782 result_oop = java_lang_boxing_object::create(T_LONG, &prim_value, CHECK_NULL);
jrose@1838 783 break;
jrose@1838 784
jrose@1524 785 case JVM_CONSTANT_Double:
coleenp@3656 786 assert(cache_index == _no_index_sentinel, "should not have been set");
jrose@1838 787 prim_value.d = this_oop->double_at(index);
jrose@1838 788 result_oop = java_lang_boxing_object::create(T_DOUBLE, &prim_value, CHECK_NULL);
jrose@1524 789 break;
jrose@1524 790
jrose@1524 791 default:
jrose@1524 792 DEBUG_ONLY( tty->print_cr("*** %p: tag at CP[%d/%d] = %d",
jrose@1524 793 this_oop(), index, cache_index, tag_value) );
jrose@1524 794 assert(false, "unexpected constant tag");
jrose@1524 795 break;
jrose@1524 796 }
jrose@1524 797
jrose@1524 798 if (cache_index >= 0) {
jrose@1524 799 // Cache the oop here also.
jrose@1838 800 Handle result_handle(THREAD, result_oop);
coleenp@3656 801 MonitorLockerEx ml(this_oop->lock()); // don't know if we really need this
coleenp@3656 802 oop result = this_oop->resolved_references()->obj_at(cache_index);
coleenp@3656 803 // Benign race condition: resolved_references may already be filled in while we were trying to lock.
jrose@1838 804 // The important thing here is that all threads pick up the same result.
jrose@1838 805 // It doesn't matter which racing thread wins, as long as only one
jrose@1838 806 // result is used by all threads, and all future queries.
jrose@1838 807 // That result may be either a resolved constant or a failure exception.
coleenp@3656 808 if (result == NULL) {
coleenp@3656 809 this_oop->resolved_references()->obj_at_put(cache_index, result_handle());
coleenp@3656 810 return result_handle();
coleenp@3656 811 } else {
coleenp@3656 812 // Return the winning thread's result. This can be different than
coleenp@3656 813 // result_handle() for MethodHandles.
coleenp@3656 814 return result;
jrose@1524 815 }
jrose@1524 816 } else {
jrose@1524 817 return result_oop;
jrose@1524 818 }
jrose@1524 819 }
jrose@1524 820
coleenp@3656 821 oop ConstantPool::uncached_string_at(int which, TRAPS) {
coleenp@3656 822 Symbol* sym = unresolved_string_at(which);
coleenp@3656 823 oop str = StringTable::intern(sym, CHECK_(NULL));
coleenp@3656 824 assert(java_lang_String::is_instance(str), "must be string");
coleenp@3656 825 return str;
coleenp@3656 826 }
twisti@3582 827
coleenp@3656 828
coleenp@3656 829 oop ConstantPool::resolve_bootstrap_specifier_at_impl(constantPoolHandle this_oop, int index, TRAPS) {
twisti@3582 830 assert(this_oop->tag_at(index).is_invoke_dynamic(), "Corrupted constant pool");
twisti@3582 831
twisti@3582 832 Handle bsm;
twisti@3582 833 int argc;
twisti@3582 834 {
twisti@3582 835 // JVM_CONSTANT_InvokeDynamic is an ordered pair of [bootm, name&type], plus optional arguments
twisti@3582 836 // The bootm, being a JVM_CONSTANT_MethodHandle, has its own cache entry.
twisti@3582 837 // It is accompanied by the optional arguments.
twisti@3582 838 int bsm_index = this_oop->invoke_dynamic_bootstrap_method_ref_index_at(index);
twisti@3582 839 oop bsm_oop = this_oop->resolve_possibly_cached_constant_at(bsm_index, CHECK_NULL);
twisti@3582 840 if (!java_lang_invoke_MethodHandle::is_instance(bsm_oop)) {
twisti@3582 841 THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "BSM not an MethodHandle");
twisti@3582 842 }
twisti@3582 843
twisti@3582 844 // Extract the optional static arguments.
twisti@3582 845 argc = this_oop->invoke_dynamic_argument_count_at(index);
twisti@3582 846 if (argc == 0) return bsm_oop;
twisti@3582 847
twisti@3582 848 bsm = Handle(THREAD, bsm_oop);
twisti@3582 849 }
twisti@3582 850
twisti@3582 851 objArrayHandle info;
twisti@3582 852 {
twisti@3582 853 objArrayOop info_oop = oopFactory::new_objArray(SystemDictionary::Object_klass(), 1+argc, CHECK_NULL);
twisti@3582 854 info = objArrayHandle(THREAD, info_oop);
twisti@3582 855 }
twisti@3582 856
twisti@3582 857 info->obj_at_put(0, bsm());
twisti@3582 858 for (int i = 0; i < argc; i++) {
twisti@3582 859 int arg_index = this_oop->invoke_dynamic_argument_index_at(index, i);
twisti@3582 860 oop arg_oop = this_oop->resolve_possibly_cached_constant_at(arg_index, CHECK_NULL);
twisti@3582 861 info->obj_at_put(1+i, arg_oop);
twisti@3582 862 }
twisti@3582 863
twisti@3582 864 return info();
twisti@3582 865 }
twisti@3582 866
coleenp@3656 867 oop ConstantPool::string_at_impl(constantPoolHandle this_oop, int which, int obj_index, TRAPS) {
coleenp@3656 868 // If the string has already been interned, this entry will be non-null
coleenp@3656 869 oop str = this_oop->resolved_references()->obj_at(obj_index);
coleenp@3656 870 if (str != NULL) return str;
coleenp@3656 871
coleenp@2069 872 Symbol* sym = this_oop->unresolved_string_at(which);
coleenp@3656 873 str = StringTable::intern(sym, CHECK_(NULL));
coleenp@3656 874 this_oop->string_at_put(which, obj_index, str);
coleenp@2069 875 assert(java_lang_String::is_instance(str), "must be string");
coleenp@2069 876 return str;
duke@0 877 }
duke@0 878
duke@0 879
coleenp@3656 880 bool ConstantPool::klass_name_at_matches(instanceKlassHandle k,
duke@0 881 int which) {
coleenp@2069 882 // Names are interned, so we can compare Symbol*s directly
coleenp@2069 883 Symbol* cp_name = klass_name_at(which);
duke@0 884 return (cp_name == k->name());
duke@0 885 }
duke@0 886
duke@0 887
coleenp@2069 888 // Iterate over symbols and decrement ones which are Symbol*s.
coleenp@2069 889 // This is done during GC so do not need to lock constantPool unless we
coleenp@2069 890 // have per-thread safepoints.
coleenp@2069 891 // Only decrement the UTF8 symbols. Unresolved classes and strings point to
coleenp@2069 892 // these symbols but didn't increment the reference count.
coleenp@3656 893 void ConstantPool::unreference_symbols() {
coleenp@2069 894 for (int index = 1; index < length(); index++) { // Index 0 is unused
coleenp@2069 895 constantTag tag = tag_at(index);
coleenp@2069 896 if (tag.is_symbol()) {
coleenp@2069 897 symbol_at(index)->decrement_refcount();
coleenp@2069 898 }
coleenp@2069 899 }
coleenp@2069 900 }
duke@0 901
duke@0 902
duke@0 903 // Compare this constant pool's entry at index1 to the constant pool
duke@0 904 // cp2's entry at index2.
coleenp@3656 905 bool ConstantPool::compare_entry_to(int index1, constantPoolHandle cp2,
duke@0 906 int index2, TRAPS) {
duke@0 907
duke@0 908 jbyte t1 = tag_at(index1).value();
duke@0 909 jbyte t2 = cp2->tag_at(index2).value();
duke@0 910
duke@0 911
duke@0 912 // JVM_CONSTANT_UnresolvedClassInError is equal to JVM_CONSTANT_UnresolvedClass
duke@0 913 // when comparing
duke@0 914 if (t1 == JVM_CONSTANT_UnresolvedClassInError) {
duke@0 915 t1 = JVM_CONSTANT_UnresolvedClass;
duke@0 916 }
duke@0 917 if (t2 == JVM_CONSTANT_UnresolvedClassInError) {
duke@0 918 t2 = JVM_CONSTANT_UnresolvedClass;
duke@0 919 }
duke@0 920
duke@0 921 if (t1 != t2) {
duke@0 922 // Not the same entry type so there is nothing else to check. Note
duke@0 923 // that this style of checking will consider resolved/unresolved
coleenp@3656 924 // class pairs as different.
coleenp@3656 925 // From the ConstantPool* API point of view, this is correct
coleenp@3656 926 // behavior. See VM_RedefineClasses::merge_constant_pools() to see how this
coleenp@3656 927 // plays out in the context of ConstantPool* merging.
duke@0 928 return false;
duke@0 929 }
duke@0 930
duke@0 931 switch (t1) {
duke@0 932 case JVM_CONSTANT_Class:
duke@0 933 {
coleenp@3656 934 Klass* k1 = klass_at(index1, CHECK_false);
coleenp@3656 935 Klass* k2 = cp2->klass_at(index2, CHECK_false);
duke@0 936 if (k1 == k2) {
duke@0 937 return true;
duke@0 938 }
duke@0 939 } break;
duke@0 940
duke@0 941 case JVM_CONSTANT_ClassIndex:
duke@0 942 {
duke@0 943 int recur1 = klass_index_at(index1);
duke@0 944 int recur2 = cp2->klass_index_at(index2);
duke@0 945 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 946 if (match) {
duke@0 947 return true;
duke@0 948 }
duke@0 949 } break;
duke@0 950
duke@0 951 case JVM_CONSTANT_Double:
duke@0 952 {
duke@0 953 jdouble d1 = double_at(index1);
duke@0 954 jdouble d2 = cp2->double_at(index2);
duke@0 955 if (d1 == d2) {
duke@0 956 return true;
duke@0 957 }
duke@0 958 } break;
duke@0 959
duke@0 960 case JVM_CONSTANT_Fieldref:
duke@0 961 case JVM_CONSTANT_InterfaceMethodref:
duke@0 962 case JVM_CONSTANT_Methodref:
duke@0 963 {
duke@0 964 int recur1 = uncached_klass_ref_index_at(index1);
duke@0 965 int recur2 = cp2->uncached_klass_ref_index_at(index2);
duke@0 966 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 967 if (match) {
duke@0 968 recur1 = uncached_name_and_type_ref_index_at(index1);
duke@0 969 recur2 = cp2->uncached_name_and_type_ref_index_at(index2);
duke@0 970 match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 971 if (match) {
duke@0 972 return true;
duke@0 973 }
duke@0 974 }
duke@0 975 } break;
duke@0 976
duke@0 977 case JVM_CONSTANT_Float:
duke@0 978 {
duke@0 979 jfloat f1 = float_at(index1);
duke@0 980 jfloat f2 = cp2->float_at(index2);
duke@0 981 if (f1 == f2) {
duke@0 982 return true;
duke@0 983 }
duke@0 984 } break;
duke@0 985
duke@0 986 case JVM_CONSTANT_Integer:
duke@0 987 {
duke@0 988 jint i1 = int_at(index1);
duke@0 989 jint i2 = cp2->int_at(index2);
duke@0 990 if (i1 == i2) {
duke@0 991 return true;
duke@0 992 }
duke@0 993 } break;
duke@0 994
duke@0 995 case JVM_CONSTANT_Long:
duke@0 996 {
duke@0 997 jlong l1 = long_at(index1);
duke@0 998 jlong l2 = cp2->long_at(index2);
duke@0 999 if (l1 == l2) {
duke@0 1000 return true;
duke@0 1001 }
duke@0 1002 } break;
duke@0 1003
duke@0 1004 case JVM_CONSTANT_NameAndType:
duke@0 1005 {
duke@0 1006 int recur1 = name_ref_index_at(index1);
duke@0 1007 int recur2 = cp2->name_ref_index_at(index2);
duke@0 1008 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 1009 if (match) {
duke@0 1010 recur1 = signature_ref_index_at(index1);
duke@0 1011 recur2 = cp2->signature_ref_index_at(index2);
duke@0 1012 match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 1013 if (match) {
duke@0 1014 return true;
duke@0 1015 }
duke@0 1016 }
duke@0 1017 } break;
duke@0 1018
duke@0 1019 case JVM_CONSTANT_StringIndex:
duke@0 1020 {
duke@0 1021 int recur1 = string_index_at(index1);
duke@0 1022 int recur2 = cp2->string_index_at(index2);
duke@0 1023 bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false);
duke@0 1024 if (match) {
duke@0 1025 return true;
duke@0 1026 }
duke@0 1027 } break;
duke@0 1028
duke@0 1029 case JVM_CONSTANT_UnresolvedClass:
duke@0 1030 {
coleenp@2069 1031 Symbol* k1 = unresolved_klass_at(index1);
coleenp@2069 1032 Symbol* k2 = cp2->unresolved_klass_at(index2);
duke@0 1033 if (k1 == k2) {
duke@0 1034 return true;
duke@0 1035 }
duke@0 1036 } break;
duke@0 1037
jrose@1524 1038 case JVM_CONSTANT_MethodType:
jrose@1524 1039 {
jrose@1524 1040 int k1 = method_type_index_at(index1);
jrose@1524 1041 int k2 = cp2->method_type_index_at(index2);
jrose@1924 1042 bool match = compare_entry_to(k1, cp2, k2, CHECK_false);
jrose@1924 1043 if (match) {
jrose@1524 1044 return true;
jrose@1524 1045 }
jrose@1524 1046 } break;
jrose@1524 1047
jrose@1524 1048 case JVM_CONSTANT_MethodHandle:
jrose@1524 1049 {
jrose@1524 1050 int k1 = method_handle_ref_kind_at(index1);
jrose@1524 1051 int k2 = cp2->method_handle_ref_kind_at(index2);
jrose@1524 1052 if (k1 == k2) {
jrose@1524 1053 int i1 = method_handle_index_at(index1);
jrose@1524 1054 int i2 = cp2->method_handle_index_at(index2);
jrose@1924 1055 bool match = compare_entry_to(i1, cp2, i2, CHECK_false);
jrose@1924 1056 if (match) {
jrose@1524 1057 return true;
jrose@1524 1058 }
jrose@1524 1059 }
jrose@1524 1060 } break;
jrose@1524 1061
jrose@1583 1062 case JVM_CONSTANT_InvokeDynamic:
jrose@1583 1063 {
jrose@1924 1064 int k1 = invoke_dynamic_bootstrap_method_ref_index_at(index1);
jrose@1924 1065 int k2 = cp2->invoke_dynamic_bootstrap_method_ref_index_at(index2);
jrose@1924 1066 bool match = compare_entry_to(k1, cp2, k2, CHECK_false);
jrose@1924 1067 if (!match) return false;
jrose@1924 1068 k1 = invoke_dynamic_name_and_type_ref_index_at(index1);
jrose@1924 1069 k2 = cp2->invoke_dynamic_name_and_type_ref_index_at(index2);
jrose@1924 1070 match = compare_entry_to(k1, cp2, k2, CHECK_false);
jrose@1924 1071 if (!match) return false;
jrose@1924 1072 int argc = invoke_dynamic_argument_count_at(index1);
jrose@1924 1073 if (argc == cp2->invoke_dynamic_argument_count_at(index2)) {
jrose@1924 1074 for (int j = 0; j < argc; j++) {
jrose@1924 1075 k1 = invoke_dynamic_argument_index_at(index1, j);
jrose@1924 1076 k2 = cp2->invoke_dynamic_argument_index_at(index2, j);
jrose@1924 1077 match = compare_entry_to(k1, cp2, k2, CHECK_false);
jrose@1924 1078 if (!match) return false;
jrose@1838 1079 }
jrose@1924 1080 return true; // got through loop; all elements equal
jrose@1583 1081 }
jrose@1583 1082 } break;
jrose@1583 1083
coleenp@3656 1084 case JVM_CONSTANT_String:
duke@0 1085 {
coleenp@2069 1086 Symbol* s1 = unresolved_string_at(index1);
coleenp@2069 1087 Symbol* s2 = cp2->unresolved_string_at(index2);
duke@0 1088 if (s1 == s2) {
duke@0 1089 return true;
duke@0 1090 }
duke@0 1091 } break;
duke@0 1092
duke@0 1093 case JVM_CONSTANT_Utf8:
duke@0 1094 {
coleenp@2069 1095 Symbol* s1 = symbol_at(index1);
coleenp@2069 1096 Symbol* s2 = cp2->symbol_at(index2);
duke@0 1097 if (s1 == s2) {
duke@0 1098 return true;
duke@0 1099 }
duke@0 1100 } break;
duke@0 1101
duke@0 1102 // Invalid is used as the tag for the second constant pool entry
duke@0 1103 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should
duke@0 1104 // not be seen by itself.
duke@0 1105 case JVM_CONSTANT_Invalid: // fall through
duke@0 1106
duke@0 1107 default:
duke@0 1108 ShouldNotReachHere();
duke@0 1109 break;
duke@0 1110 }
duke@0 1111
duke@0 1112 return false;
duke@0 1113 } // end compare_entry_to()
duke@0 1114
duke@0 1115
duke@0 1116 // Copy this constant pool's entries at start_i to end_i (inclusive)
duke@0 1117 // to the constant pool to_cp's entries starting at to_i. A total of
duke@0 1118 // (end_i - start_i) + 1 entries are copied.
coleenp@3656 1119 void ConstantPool::copy_cp_to_impl(constantPoolHandle from_cp, int start_i, int end_i,
duke@0 1120 constantPoolHandle to_cp, int to_i, TRAPS) {
duke@0 1121
duke@0 1122 int dest_i = to_i; // leave original alone for debug purposes
duke@0 1123
jrose@1924 1124 for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) {
jrose@1924 1125 copy_entry_to(from_cp, src_i, to_cp, dest_i, CHECK);
jrose@1838 1126
jrose@1924 1127 switch (from_cp->tag_at(src_i).value()) {
duke@0 1128 case JVM_CONSTANT_Double:
duke@0 1129 case JVM_CONSTANT_Long:
duke@0 1130 // double and long take two constant pool entries
duke@0 1131 src_i += 2;
duke@0 1132 dest_i += 2;
duke@0 1133 break;
duke@0 1134
duke@0 1135 default:
duke@0 1136 // all others take one constant pool entry
duke@0 1137 src_i++;
duke@0 1138 dest_i++;
duke@0 1139 break;
duke@0 1140 }
duke@0 1141 }
jrose@1924 1142
jrose@1924 1143 int from_oplen = operand_array_length(from_cp->operands());
jrose@1924 1144 int old_oplen = operand_array_length(to_cp->operands());
jrose@1924 1145 if (from_oplen != 0) {
kamg@3874 1146 ClassLoaderData* loader_data = to_cp->pool_holder()->class_loader_data();
jrose@1924 1147 // append my operands to the target's operands array
jrose@1924 1148 if (old_oplen == 0) {
kamg@3874 1149 // Can't just reuse from_cp's operand list because of deallocation issues
kamg@3874 1150 int len = from_cp->operands()->length();
kamg@3874 1151 Array<u2>* new_ops = MetadataFactory::new_array<u2>(loader_data, len, CHECK);
kamg@3874 1152 Copy::conjoint_memory_atomic(
kamg@3874 1153 from_cp->operands()->adr_at(0), new_ops->adr_at(0), len * sizeof(u2));
kamg@3874 1154 to_cp->set_operands(new_ops);
jrose@1924 1155 } else {
jrose@1924 1156 int old_len = to_cp->operands()->length();
jrose@1924 1157 int from_len = from_cp->operands()->length();
jrose@1924 1158 int old_off = old_oplen * sizeof(u2);
jrose@1924 1159 int from_off = from_oplen * sizeof(u2);
coleenp@3656 1160 // Use the metaspace for the destination constant pool
coleenp@3656 1161 Array<u2>* new_operands = MetadataFactory::new_array<u2>(loader_data, old_len + from_len, CHECK);
jrose@1924 1162 int fillp = 0, len = 0;
jrose@1924 1163 // first part of dest
coleenp@3656 1164 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(0),
coleenp@3656 1165 new_operands->adr_at(fillp),
jrose@1924 1166 (len = old_off) * sizeof(u2));
jrose@1924 1167 fillp += len;
jrose@1924 1168 // first part of src
coleenp@3656 1169 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(0),
coleenp@3656 1170 new_operands->adr_at(fillp),
jrose@1924 1171 (len = from_off) * sizeof(u2));
jrose@1924 1172 fillp += len;
jrose@1924 1173 // second part of dest
coleenp@3656 1174 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(old_off),
coleenp@3656 1175 new_operands->adr_at(fillp),
jrose@1924 1176 (len = old_len - old_off) * sizeof(u2));
jrose@1924 1177 fillp += len;
jrose@1924 1178 // second part of src
coleenp@3656 1179 Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(from_off),
coleenp@3656 1180 new_operands->adr_at(fillp),
jrose@1924 1181 (len = from_len - from_off) * sizeof(u2));
jrose@1924 1182 fillp += len;
jrose@1924 1183 assert(fillp == new_operands->length(), "");
jrose@1924 1184
jrose@1924 1185 // Adjust indexes in the first part of the copied operands array.
jrose@1924 1186 for (int j = 0; j < from_oplen; j++) {
coleenp@3656 1187 int offset = operand_offset_at(new_operands, old_oplen + j);
jrose@1924 1188 assert(offset == operand_offset_at(from_cp->operands(), j), "correct copy");
jrose@1924 1189 offset += old_len; // every new tuple is preceded by old_len extra u2's
coleenp@3656 1190 operand_offset_at_put(new_operands, old_oplen + j, offset);
jrose@1924 1191 }
jrose@1924 1192
jrose@1924 1193 // replace target operands array with combined array
coleenp@3656 1194 to_cp->set_operands(new_operands);
jrose@1924 1195 }
jrose@1924 1196 }
jrose@1924 1197
duke@0 1198 } // end copy_cp_to()
duke@0 1199
duke@0 1200
duke@0 1201 // Copy this constant pool's entry at from_i to the constant pool
duke@0 1202 // to_cp's entry at to_i.
coleenp@3656 1203 void ConstantPool::copy_entry_to(constantPoolHandle from_cp, int from_i,
jrose@1924 1204 constantPoolHandle to_cp, int to_i,
jrose@1924 1205 TRAPS) {
duke@0 1206
jrose@1924 1207 int tag = from_cp->tag_at(from_i).value();
jrose@1924 1208 switch (tag) {
duke@0 1209 case JVM_CONSTANT_Class:
duke@0 1210 {
coleenp@3656 1211 Klass* k = from_cp->klass_at(from_i, CHECK);
duke@0 1212 to_cp->klass_at_put(to_i, k);
duke@0 1213 } break;
duke@0 1214
duke@0 1215 case JVM_CONSTANT_ClassIndex:
duke@0 1216 {
jrose@1924 1217 jint ki = from_cp->klass_index_at(from_i);
duke@0 1218 to_cp->klass_index_at_put(to_i, ki);
duke@0 1219 } break;
duke@0 1220
duke@0 1221 case JVM_CONSTANT_Double:
duke@0 1222 {
jrose@1924 1223 jdouble d = from_cp->double_at(from_i);
duke@0 1224 to_cp->double_at_put(to_i, d);
duke@0 1225 // double takes two constant pool entries so init second entry's tag
duke@0 1226 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid);
duke@0 1227 } break;
duke@0 1228
duke@0 1229 case JVM_CONSTANT_Fieldref:
duke@0 1230 {
jrose@1924 1231 int class_index = from_cp->uncached_klass_ref_index_at(from_i);
jrose@1924 1232 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i);
duke@0 1233 to_cp->field_at_put(to_i, class_index, name_and_type_index);
duke@0 1234 } break;
duke@0 1235
duke@0 1236 case JVM_CONSTANT_Float:
duke@0 1237 {
jrose@1924 1238 jfloat f = from_cp->float_at(from_i);
duke@0 1239 to_cp->float_at_put(to_i, f);
duke@0 1240 } break;
duke@0 1241
duke@0 1242 case JVM_CONSTANT_Integer:
duke@0 1243 {
jrose@1924 1244 jint i = from_cp->int_at(from_i);
duke@0 1245 to_cp->int_at_put(to_i, i);
duke@0 1246 } break;
duke@0 1247
duke@0 1248 case JVM_CONSTANT_InterfaceMethodref:
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->interface_method_at_put(to_i, class_index, name_and_type_index);
duke@0 1253 } break;
duke@0 1254
duke@0 1255 case JVM_CONSTANT_Long:
duke@0 1256 {
jrose@1924 1257 jlong l = from_cp->long_at(from_i);
duke@0 1258 to_cp->long_at_put(to_i, l);
duke@0 1259 // long takes two constant pool entries so init second entry's tag
duke@0 1260 to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid);
duke@0 1261 } break;
duke@0 1262
duke@0 1263 case JVM_CONSTANT_Methodref:
duke@0 1264 {
jrose@1924 1265 int class_index = from_cp->uncached_klass_ref_index_at(from_i);
jrose@1924 1266 int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i);
duke@0 1267 to_cp->method_at_put(to_i, class_index, name_and_type_index);
duke@0 1268 } break;
duke@0 1269
duke@0 1270 case JVM_CONSTANT_NameAndType:
duke@0 1271 {
jrose@1924 1272 int name_ref_index = from_cp->name_ref_index_at(from_i);
jrose@1924 1273 int signature_ref_index = from_cp->signature_ref_index_at(from_i);
duke@0 1274 to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index);
duke@0 1275 } break;
duke@0 1276
duke@0 1277 case JVM_CONSTANT_StringIndex:
duke@0 1278 {
jrose@1924 1279 jint si = from_cp->string_index_at(from_i);
duke@0 1280 to_cp->string_index_at_put(to_i, si);
duke@0 1281 } break;
duke@0 1282
duke@0 1283 case JVM_CONSTANT_UnresolvedClass:
duke@0 1284 {
coleenp@2187 1285 // Can be resolved after checking tag, so check the slot first.
coleenp@2187 1286 CPSlot entry = from_cp->slot_at(from_i);
coleenp@3656 1287 if (entry.is_resolved()) {
coleenp@3656 1288 assert(entry.get_klass()->is_klass(), "must be");
coleenp@2187 1289 // Already resolved
coleenp@3656 1290 to_cp->klass_at_put(to_i, entry.get_klass());
coleenp@2187 1291 } else {
coleenp@2187 1292 to_cp->unresolved_klass_at_put(to_i, entry.get_symbol());
coleenp@2187 1293 }
duke@0 1294 } break;
duke@0 1295
duke@0 1296 case JVM_CONSTANT_UnresolvedClassInError:
duke@0 1297 {
coleenp@2069 1298 Symbol* k = from_cp->unresolved_klass_at(from_i);
duke@0 1299 to_cp->unresolved_klass_at_put(to_i, k);
duke@0 1300 to_cp->tag_at_put(to_i, JVM_CONSTANT_UnresolvedClassInError);
duke@0 1301 } break;
duke@0 1302
duke@0 1303
coleenp@3656 1304 case JVM_CONSTANT_String:
duke@0 1305 {
coleenp@3656 1306 Symbol* s = from_cp->unresolved_string_at(from_i);
coleenp@3656 1307 to_cp->unresolved_string_at_put(to_i, s);
duke@0 1308 } break;
duke@0 1309
duke@0 1310 case JVM_CONSTANT_Utf8:
duke@0 1311 {
coleenp@2069 1312 Symbol* s = from_cp->symbol_at(from_i);
coleenp@3656 1313 // Need to increase refcount, the old one will be thrown away and deferenced
coleenp@3656 1314 s->increment_refcount();
duke@0 1315 to_cp->symbol_at_put(to_i, s);
duke@0 1316 } break;
duke@0 1317
jrose@1524 1318 case JVM_CONSTANT_MethodType:
jrose@1524 1319 {
jrose@1924 1320 jint k = from_cp->method_type_index_at(from_i);
jrose@1524 1321 to_cp->method_type_index_at_put(to_i, k);
jrose@1524 1322 } break;
jrose@1524 1323
jrose@1524 1324 case JVM_CONSTANT_MethodHandle:
jrose@1524 1325 {
jrose@1924 1326 int k1 = from_cp->method_handle_ref_kind_at(from_i);
jrose@1924 1327 int k2 = from_cp->method_handle_index_at(from_i);
jrose@1524 1328 to_cp->method_handle_index_at_put(to_i, k1, k2);
jrose@1524 1329 } break;
jrose@1524 1330
jrose@1583 1331 case JVM_CONSTANT_InvokeDynamic:
jrose@1583 1332 {
jrose@1924 1333 int k1 = from_cp->invoke_dynamic_bootstrap_specifier_index(from_i);
jrose@1924 1334 int k2 = from_cp->invoke_dynamic_name_and_type_ref_index_at(from_i);
jrose@1924 1335 k1 += operand_array_length(to_cp->operands()); // to_cp might already have operands
jrose@1924 1336 to_cp->invoke_dynamic_at_put(to_i, k1, k2);
jrose@1583 1337 } break;
jrose@1583 1338
duke@0 1339 // Invalid is used as the tag for the second constant pool entry
duke@0 1340 // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should
duke@0 1341 // not be seen by itself.
duke@0 1342 case JVM_CONSTANT_Invalid: // fall through
duke@0 1343
duke@0 1344 default:
duke@0 1345 {
duke@0 1346 ShouldNotReachHere();
duke@0 1347 } break;
duke@0 1348 }
duke@0 1349 } // end copy_entry_to()
duke@0 1350
duke@0 1351
duke@0 1352 // Search constant pool search_cp for an entry that matches this
duke@0 1353 // constant pool's entry at pattern_i. Returns the index of a
duke@0 1354 // matching entry or zero (0) if there is no matching entry.
coleenp@3656 1355 int ConstantPool::find_matching_entry(int pattern_i,
duke@0 1356 constantPoolHandle search_cp, TRAPS) {
duke@0 1357
duke@0 1358 // index zero (0) is not used
duke@0 1359 for (int i = 1; i < search_cp->length(); i++) {
duke@0 1360 bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0);
duke@0 1361 if (found) {
duke@0 1362 return i;
duke@0 1363 }
duke@0 1364 }
duke@0 1365
duke@0 1366 return 0; // entry not found; return unused index zero (0)
duke@0 1367 } // end find_matching_entry()
duke@0 1368
duke@0 1369
duke@0 1370 #ifndef PRODUCT
duke@0 1371
coleenp@3656 1372 const char* ConstantPool::printable_name_at(int which) {
duke@0 1373
duke@0 1374 constantTag tag = tag_at(which);
duke@0 1375
coleenp@3656 1376 if (tag.is_string()) {
duke@0 1377 return string_at_noresolve(which);
duke@0 1378 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
duke@0 1379 return klass_name_at(which)->as_C_string();
duke@0 1380 } else if (tag.is_symbol()) {
duke@0 1381 return symbol_at(which)->as_C_string();
duke@0 1382 }
duke@0 1383 return "";
duke@0 1384 }
duke@0 1385
duke@0 1386 #endif // PRODUCT
duke@0 1387
duke@0 1388
duke@0 1389 // JVMTI GetConstantPool support
duke@0 1390
duke@0 1391 // For temporary use until code is stable.
duke@0 1392 #define DBG(code)
duke@0 1393
duke@0 1394 static const char* WARN_MSG = "Must not be such entry!";
duke@0 1395
duke@0 1396 static void print_cpool_bytes(jint cnt, u1 *bytes) {
duke@0 1397 jint size = 0;
duke@0 1398 u2 idx1, idx2;
duke@0 1399
duke@0 1400 for (jint idx = 1; idx < cnt; idx++) {
duke@0 1401 jint ent_size = 0;
duke@0 1402 u1 tag = *bytes++;
duke@0 1403 size++; // count tag
duke@0 1404
duke@0 1405 printf("const #%03d, tag: %02d ", idx, tag);
duke@0 1406 switch(tag) {
duke@0 1407 case JVM_CONSTANT_Invalid: {
duke@0 1408 printf("Invalid");
duke@0 1409 break;
duke@0 1410 }
duke@0 1411 case JVM_CONSTANT_Unicode: {
duke@0 1412 printf("Unicode %s", WARN_MSG);
duke@0 1413 break;
duke@0 1414 }
duke@0 1415 case JVM_CONSTANT_Utf8: {
duke@0 1416 u2 len = Bytes::get_Java_u2(bytes);
duke@0 1417 char str[128];
duke@0 1418 if (len > 127) {
duke@0 1419 len = 127;
duke@0 1420 }
duke@0 1421 strncpy(str, (char *) (bytes+2), len);
duke@0 1422 str[len] = '\0';
duke@0 1423 printf("Utf8 \"%s\"", str);
duke@0 1424 ent_size = 2 + len;
duke@0 1425 break;
duke@0 1426 }
duke@0 1427 case JVM_CONSTANT_Integer: {
duke@0 1428 u4 val = Bytes::get_Java_u4(bytes);
duke@0 1429 printf("int %d", *(int *) &val);
duke@0 1430 ent_size = 4;
duke@0 1431 break;
duke@0 1432 }
duke@0 1433 case JVM_CONSTANT_Float: {
duke@0 1434 u4 val = Bytes::get_Java_u4(bytes);
duke@0 1435 printf("float %5.3ff", *(float *) &val);
duke@0 1436 ent_size = 4;
duke@0 1437 break;
duke@0 1438 }
duke@0 1439 case JVM_CONSTANT_Long: {
duke@0 1440 u8 val = Bytes::get_Java_u8(bytes);
never@2731 1441 printf("long "INT64_FORMAT, (int64_t) *(jlong *) &val);
duke@0 1442 ent_size = 8;
duke@0 1443 idx++; // Long takes two cpool slots
duke@0 1444 break;
duke@0 1445 }
duke@0 1446 case JVM_CONSTANT_Double: {
duke@0 1447 u8 val = Bytes::get_Java_u8(bytes);
duke@0 1448 printf("double %5.3fd", *(jdouble *)&val);
duke@0 1449 ent_size = 8;
duke@0 1450 idx++; // Double takes two cpool slots
duke@0 1451 break;
duke@0 1452 }
duke@0 1453 case JVM_CONSTANT_Class: {
duke@0 1454 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1455 printf("class #%03d", idx1);
duke@0 1456 ent_size = 2;
duke@0 1457 break;
duke@0 1458 }
duke@0 1459 case JVM_CONSTANT_String: {
duke@0 1460 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1461 printf("String #%03d", idx1);
duke@0 1462 ent_size = 2;
duke@0 1463 break;
duke@0 1464 }
duke@0 1465 case JVM_CONSTANT_Fieldref: {
duke@0 1466 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1467 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 1468 printf("Field #%03d, #%03d", (int) idx1, (int) idx2);
duke@0 1469 ent_size = 4;
duke@0 1470 break;
duke@0 1471 }
duke@0 1472 case JVM_CONSTANT_Methodref: {
duke@0 1473 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1474 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 1475 printf("Method #%03d, #%03d", idx1, idx2);
duke@0 1476 ent_size = 4;
duke@0 1477 break;
duke@0 1478 }
duke@0 1479 case JVM_CONSTANT_InterfaceMethodref: {
duke@0 1480 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1481 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 1482 printf("InterfMethod #%03d, #%03d", idx1, idx2);
duke@0 1483 ent_size = 4;
duke@0 1484 break;
duke@0 1485 }
duke@0 1486 case JVM_CONSTANT_NameAndType: {
duke@0 1487 idx1 = Bytes::get_Java_u2(bytes);
duke@0 1488 idx2 = Bytes::get_Java_u2(bytes+2);
duke@0 1489 printf("NameAndType #%03d, #%03d", idx1, idx2);
duke@0 1490 ent_size = 4;
duke@0 1491 break;
duke@0 1492 }
duke@0 1493 case JVM_CONSTANT_ClassIndex: {
duke@0 1494 printf("ClassIndex %s", WARN_MSG);
duke@0 1495 break;
duke@0 1496 }
duke@0 1497 case JVM_CONSTANT_UnresolvedClass: {
duke@0 1498 printf("UnresolvedClass: %s", WARN_MSG);
duke@0 1499 break;
duke@0 1500 }
duke@0 1501 case JVM_CONSTANT_UnresolvedClassInError: {
duke@0 1502 printf("UnresolvedClassInErr: %s", WARN_MSG);
duke@0 1503 break;
duke@0 1504 }
duke@0 1505 case JVM_CONSTANT_StringIndex: {
duke@0 1506 printf("StringIndex: %s", WARN_MSG);
duke@0 1507 break;
duke@0 1508 }
duke@0 1509 }
duke@0 1510 printf(";\n");
duke@0 1511 bytes += ent_size;
duke@0 1512 size += ent_size;
duke@0 1513 }
duke@0 1514 printf("Cpool size: %d\n", size);
duke@0 1515 fflush(0);
duke@0 1516 return;
duke@0 1517 } /* end print_cpool_bytes */
duke@0 1518
duke@0 1519
duke@0 1520 // Returns size of constant pool entry.
coleenp@3656 1521 jint ConstantPool::cpool_entry_size(jint idx) {
duke@0 1522 switch(tag_at(idx).value()) {
duke@0 1523 case JVM_CONSTANT_Invalid:
duke@0 1524 case JVM_CONSTANT_Unicode:
duke@0 1525 return 1;
duke@0 1526
duke@0 1527 case JVM_CONSTANT_Utf8:
duke@0 1528 return 3 + symbol_at(idx)->utf8_length();
duke@0 1529
duke@0 1530 case JVM_CONSTANT_Class:
duke@0 1531 case JVM_CONSTANT_String:
duke@0 1532 case JVM_CONSTANT_ClassIndex:
duke@0 1533 case JVM_CONSTANT_UnresolvedClass:
duke@0 1534 case JVM_CONSTANT_UnresolvedClassInError:
duke@0 1535 case JVM_CONSTANT_StringIndex:
jrose@1524 1536 case JVM_CONSTANT_MethodType:
duke@0 1537 return 3;
duke@0 1538
jrose@1524 1539 case JVM_CONSTANT_MethodHandle:
jrose@1524 1540 return 4; //tag, ref_kind, ref_index
jrose@1524 1541
duke@0 1542 case JVM_CONSTANT_Integer:
duke@0 1543 case JVM_CONSTANT_Float:
duke@0 1544 case JVM_CONSTANT_Fieldref:
duke@0 1545 case JVM_CONSTANT_Methodref:
duke@0 1546 case JVM_CONSTANT_InterfaceMethodref:
duke@0 1547 case JVM_CONSTANT_NameAndType:
jrose@1838 1548 return 5;
jrose@1838 1549
jrose@1583 1550 case JVM_CONSTANT_InvokeDynamic:
jrose@1924 1551 // u1 tag, u2 bsm, u2 nt
jrose@1924 1552 return 5;
duke@0 1553
duke@0 1554 case JVM_CONSTANT_Long:
duke@0 1555 case JVM_CONSTANT_Double:
duke@0 1556 return 9;
duke@0 1557 }
duke@0 1558 assert(false, "cpool_entry_size: Invalid constant pool entry tag");
duke@0 1559 return 1;
duke@0 1560 } /* end cpool_entry_size */
duke@0 1561
duke@0 1562
duke@0 1563 // SymbolHashMap is used to find a constant pool index from a string.
duke@0 1564 // This function fills in SymbolHashMaps, one for utf8s and one for
duke@0 1565 // class names, returns size of the cpool raw bytes.
coleenp@3656 1566 jint ConstantPool::hash_entries_to(SymbolHashMap *symmap,
duke@0 1567 SymbolHashMap *classmap) {
duke@0 1568 jint size = 0;
duke@0 1569
duke@0 1570 for (u2 idx = 1; idx < length(); idx++) {
duke@0 1571 u2 tag = tag_at(idx).value();
duke@0 1572 size += cpool_entry_size(idx);
duke@0 1573
duke@0 1574 switch(tag) {
duke@0 1575 case JVM_CONSTANT_Utf8: {
coleenp@2069 1576 Symbol* sym = symbol_at(idx);
duke@0 1577 symmap->add_entry(sym, idx);
duke@0 1578 DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx));
duke@0 1579 break;
duke@0 1580 }
duke@0 1581 case JVM_CONSTANT_Class:
duke@0 1582 case JVM_CONSTANT_UnresolvedClass:
duke@0 1583 case JVM_CONSTANT_UnresolvedClassInError: {
coleenp@2069 1584 Symbol* sym = klass_name_at(idx);
duke@0 1585 classmap->add_entry(sym, idx);
duke@0 1586 DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx));
duke@0 1587 break;
duke@0 1588 }
duke@0 1589 case JVM_CONSTANT_Long:
duke@0 1590 case JVM_CONSTANT_Double: {
duke@0 1591 idx++; // Both Long and Double take two cpool slots
duke@0 1592 break;
duke@0 1593 }
duke@0 1594 }
duke@0 1595 }
duke@0 1596 return size;
duke@0 1597 } /* end hash_utf8_entries_to */
duke@0 1598
duke@0 1599
duke@0 1600 // Copy cpool bytes.
duke@0 1601 // Returns:
duke@0 1602 // 0, in case of OutOfMemoryError
duke@0 1603 // -1, in case of internal error
duke@0 1604 // > 0, count of the raw cpool bytes that have been copied
coleenp@3656 1605 int ConstantPool::copy_cpool_bytes(int cpool_size,
duke@0 1606 SymbolHashMap* tbl,
duke@0 1607 unsigned char *bytes) {
duke@0 1608 u2 idx1, idx2;
duke@0 1609 jint size = 0;
duke@0 1610 jint cnt = length();
duke@0 1611 unsigned char *start_bytes = bytes;
duke@0 1612
duke@0 1613 for (jint idx = 1; idx < cnt; idx++) {
duke@0 1614 u1 tag = tag_at(idx).value();
duke@0 1615 jint ent_size = cpool_entry_size(idx);
duke@0 1616
duke@0 1617 assert(size + ent_size <= cpool_size, "Size mismatch");
duke@0 1618
duke@0 1619 *bytes = tag;
duke@0 1620 DBG(printf("#%03hd tag=%03hd, ", idx, tag));
duke@0 1621 switch(tag) {
duke@0 1622 case JVM_CONSTANT_Invalid: {
duke@0 1623 DBG(printf("JVM_CONSTANT_Invalid"));
duke@0 1624 break;
duke@0 1625 }
duke@0 1626 case JVM_CONSTANT_Unicode: {
duke@0 1627 assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode");
duke@0 1628 DBG(printf("JVM_CONSTANT_Unicode"));
duke@0 1629 break;
duke@0 1630 }
duke@0 1631 case JVM_CONSTANT_Utf8: {
coleenp@2069 1632 Symbol* sym = symbol_at(idx);
duke@0 1633 char* str = sym->as_utf8();
duke@0 1634 // Warning! It's crashing on x86 with len = sym->utf8_length()
duke@0 1635 int len = (int) strlen(str);
duke@0 1636 Bytes::put_Java_u2((address) (bytes+1), (u2) len);
duke@0 1637 for (int i = 0; i < len; i++) {
duke@0 1638 bytes[3+i] = (u1) str[i];
duke@0 1639 }
duke@0 1640 DBG(printf("JVM_CONSTANT_Utf8: %s ", str));
duke@0 1641 break;
duke@0 1642 }
duke@0 1643 case JVM_CONSTANT_Integer: {
duke@0 1644 jint val = int_at(idx);
duke@0 1645 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val);
duke@0 1646 break;
duke@0 1647 }
duke@0 1648 case JVM_CONSTANT_Float: {
duke@0 1649 jfloat val = float_at(idx);
duke@0 1650 Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val);
duke@0 1651 break;
duke@0 1652 }
duke@0 1653 case JVM_CONSTANT_Long: {
duke@0 1654 jlong val = long_at(idx);
duke@0 1655 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val);
duke@0 1656 idx++; // Long takes two cpool slots
duke@0 1657 break;
duke@0 1658 }
duke@0 1659 case JVM_CONSTANT_Double: {
duke@0 1660 jdouble val = double_at(idx);
duke@0 1661 Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val);
duke@0 1662 idx++; // Double takes two cpool slots
duke@0 1663 break;
duke@0 1664 }
duke@0 1665 case JVM_CONSTANT_Class:
duke@0 1666 case JVM_CONSTANT_UnresolvedClass:
duke@0 1667 case JVM_CONSTANT_UnresolvedClassInError: {
duke@0 1668 *bytes = JVM_CONSTANT_Class;
coleenp@2069 1669 Symbol* sym = klass_name_at(idx);
duke@0 1670 idx1 = tbl->symbol_to_value(sym);
duke@0 1671 assert(idx1 != 0, "Have not found a hashtable entry");
duke@0 1672 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1673 DBG(printf("JVM_CONSTANT_Class: idx=#%03hd, %s", idx1, sym->as_utf8()));
duke@0 1674 break;
duke@0 1675 }
duke@0 1676 case JVM_CONSTANT_String: {
duke@0 1677 *bytes = JVM_CONSTANT_String;
coleenp@2069 1678 Symbol* sym = unresolved_string_at(idx);
duke@0 1679 idx1 = tbl->symbol_to_value(sym);
duke@0 1680 assert(idx1 != 0, "Have not found a hashtable entry");
duke@0 1681 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1682 DBG(char *str = sym->as_utf8());
coleenp@3656 1683 DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, str));
duke@0 1684 break;
duke@0 1685 }
duke@0 1686 case JVM_CONSTANT_Fieldref:
duke@0 1687 case JVM_CONSTANT_Methodref:
duke@0 1688 case JVM_CONSTANT_InterfaceMethodref: {
duke@0 1689 idx1 = uncached_klass_ref_index_at(idx);
duke@0 1690 idx2 = uncached_name_and_type_ref_index_at(idx);
duke@0 1691 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1692 Bytes::put_Java_u2((address) (bytes+3), idx2);
duke@0 1693 DBG(printf("JVM_CONSTANT_Methodref: %hd %hd", idx1, idx2));
duke@0 1694 break;
duke@0 1695 }
duke@0 1696 case JVM_CONSTANT_NameAndType: {
duke@0 1697 idx1 = name_ref_index_at(idx);
duke@0 1698 idx2 = signature_ref_index_at(idx);
duke@0 1699 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1700 Bytes::put_Java_u2((address) (bytes+3), idx2);
duke@0 1701 DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2));
duke@0 1702 break;
duke@0 1703 }
duke@0 1704 case JVM_CONSTANT_ClassIndex: {
duke@0 1705 *bytes = JVM_CONSTANT_Class;
duke@0 1706 idx1 = klass_index_at(idx);
duke@0 1707 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1708 DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1));
duke@0 1709 break;
duke@0 1710 }
duke@0 1711 case JVM_CONSTANT_StringIndex: {
duke@0 1712 *bytes = JVM_CONSTANT_String;
duke@0 1713 idx1 = string_index_at(idx);
duke@0 1714 Bytes::put_Java_u2((address) (bytes+1), idx1);
duke@0 1715 DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1));
duke@0 1716 break;
duke@0 1717 }
coleenp@3656 1718 case JVM_CONSTANT_MethodHandle:
coleenp@3656 1719 case JVM_CONSTANT_MethodHandleInError: {
jrose@1524 1720 *bytes = JVM_CONSTANT_MethodHandle;
jrose@1524 1721 int kind = method_handle_ref_kind_at(idx);
jrose@1524 1722 idx1 = method_handle_index_at(idx);
jrose@1524 1723 *(bytes+1) = (unsigned char) kind;
jrose@1524 1724 Bytes::put_Java_u2((address) (bytes+2), idx1);
jrose@1524 1725 DBG(printf("JVM_CONSTANT_MethodHandle: %d %hd", kind, idx1));
jrose@1524 1726 break;
jrose@1524 1727 }
coleenp@3656 1728 case JVM_CONSTANT_MethodType:
coleenp@3656 1729 case JVM_CONSTANT_MethodTypeInError: {
jrose@1524 1730 *bytes = JVM_CONSTANT_MethodType;
jrose@1524 1731 idx1 = method_type_index_at(idx);
jrose@1524 1732 Bytes::put_Java_u2((address) (bytes+1), idx1);
jrose@1524 1733 DBG(printf("JVM_CONSTANT_MethodType: %hd", idx1));
jrose@1524 1734 break;
jrose@1524 1735 }
jrose@1583 1736 case JVM_CONSTANT_InvokeDynamic: {
jrose@1924 1737 *bytes = tag;
jrose@1924 1738 idx1 = extract_low_short_from_int(*int_at_addr(idx));
jrose@1924 1739 idx2 = extract_high_short_from_int(*int_at_addr(idx));
jrose@1924 1740 assert(idx2 == invoke_dynamic_name_and_type_ref_index_at(idx), "correct half of u4");
jrose@1583 1741 Bytes::put_Java_u2((address) (bytes+1), idx1);
jrose@1583 1742 Bytes::put_Java_u2((address) (bytes+3), idx2);
jrose@1924 1743 DBG(printf("JVM_CONSTANT_InvokeDynamic: %hd %hd", idx1, idx2));
jrose@1583 1744 break;
jrose@1583 1745 }
duke@0 1746 }
duke@0 1747 DBG(printf("\n"));
duke@0 1748 bytes += ent_size;
duke@0 1749 size += ent_size;
duke@0 1750 }
duke@0 1751 assert(size == cpool_size, "Size mismatch");
duke@0 1752
duke@0 1753 // Keep temorarily for debugging until it's stable.
duke@0 1754 DBG(print_cpool_bytes(cnt, start_bytes));
duke@0 1755 return (int)(bytes - start_bytes);
duke@0 1756 } /* end copy_cpool_bytes */
duke@0 1757
duke@0 1758
coleenp@3656 1759 void ConstantPool::set_on_stack(const bool value) {
coleenp@3656 1760 _on_stack = value;
coleenp@3656 1761 if (value) MetadataOnStackMark::record(this);
coleenp@3656 1762 }
coleenp@3656 1763
coleenp@3656 1764 // JSR 292 support for patching constant pool oops after the class is linked and
coleenp@3656 1765 // the oop array for resolved references are created.
coleenp@3656 1766 // We can't do this during classfile parsing, which is how the other indexes are
coleenp@3656 1767 // patched. The other patches are applied early for some error checking
coleenp@3656 1768 // so only defer the pseudo_strings.
coleenp@3656 1769 void ConstantPool::patch_resolved_references(
coleenp@3656 1770 GrowableArray<Handle>* cp_patches) {
coleenp@3656 1771 assert(EnableInvokeDynamic, "");
coleenp@3656 1772 for (int index = 1; index < cp_patches->length(); index++) { // Index 0 is unused
coleenp@3656 1773 Handle patch = cp_patches->at(index);
coleenp@3656 1774 if (patch.not_null()) {
coleenp@3656 1775 assert (tag_at(index).is_string(), "should only be string left");
coleenp@3656 1776 // Patching a string means pre-resolving it.
coleenp@3656 1777 // The spelling in the constant pool is ignored.
coleenp@3656 1778 // The constant reference may be any object whatever.
coleenp@3656 1779 // If it is not a real interned string, the constant is referred
coleenp@3656 1780 // to as a "pseudo-string", and must be presented to the CP
coleenp@3656 1781 // explicitly, because it may require scavenging.
coleenp@3656 1782 int obj_index = cp_to_object_index(index);
coleenp@3656 1783 pseudo_string_at_put(index, obj_index, patch());
coleenp@3656 1784 DEBUG_ONLY(cp_patches->at_put(index, Handle());)
coleenp@3656 1785 }
coleenp@3656 1786 }
coleenp@3656 1787 #ifdef ASSERT
coleenp@3656 1788 // Ensure that all the patches have been used.
coleenp@3656 1789 for (int index = 0; index < cp_patches->length(); index++) {
coleenp@3656 1790 assert(cp_patches->at(index).is_null(),
coleenp@3656 1791 err_msg("Unused constant pool patch at %d in class file %s",
coleenp@3656 1792 index,
coleenp@3656 1793 InstanceKlass::cast(pool_holder())->external_name()));
coleenp@3656 1794 }
coleenp@3656 1795 #endif // ASSERT
coleenp@3656 1796 }
coleenp@3656 1797
coleenp@3656 1798 #ifndef PRODUCT
coleenp@3656 1799
coleenp@3656 1800 // CompileTheWorld support. Preload all classes loaded references in the passed in constantpool
coleenp@3656 1801 void ConstantPool::preload_and_initialize_all_classes(ConstantPool* obj, TRAPS) {
coleenp@3656 1802 guarantee(obj->is_constantPool(), "object must be constant pool");
coleenp@3656 1803 constantPoolHandle cp(THREAD, (ConstantPool*)obj);
coleenp@3656 1804 guarantee(cp->pool_holder() != NULL, "must be fully loaded");
coleenp@3656 1805
coleenp@3656 1806 for (int i = 0; i< cp->length(); i++) {
coleenp@3656 1807 if (cp->tag_at(i).is_unresolved_klass()) {
coleenp@3656 1808 // This will force loading of the class
coleenp@3656 1809 Klass* klass = cp->klass_at(i, CHECK);
coleenp@3656 1810 if (klass->oop_is_instance()) {
coleenp@3656 1811 // Force initialization of class
coleenp@3656 1812 InstanceKlass::cast(klass)->initialize(CHECK);
coleenp@3656 1813 }
coleenp@3656 1814 }
coleenp@3656 1815 }
coleenp@3656 1816 }
coleenp@3656 1817
coleenp@3656 1818 #endif
coleenp@3656 1819
coleenp@3656 1820
coleenp@3656 1821 // Printing
coleenp@3656 1822
coleenp@3656 1823 void ConstantPool::print_on(outputStream* st) const {
coleenp@3656 1824 EXCEPTION_MARK;
coleenp@3656 1825 assert(is_constantPool(), "must be constantPool");
coleenp@3656 1826 st->print_cr(internal_name());
coleenp@3656 1827 if (flags() != 0) {
coleenp@3656 1828 st->print(" - flags: 0x%x", flags());
coleenp@3656 1829 if (has_pseudo_string()) st->print(" has_pseudo_string");
coleenp@3656 1830 if (has_invokedynamic()) st->print(" has_invokedynamic");
coleenp@3656 1831 if (has_preresolution()) st->print(" has_preresolution");
coleenp@3656 1832 st->cr();
coleenp@3656 1833 }
coleenp@3656 1834 if (pool_holder() != NULL) {
coleenp@3656 1835 st->print_cr(" - holder: " INTPTR_FORMAT, pool_holder());
coleenp@3656 1836 }
coleenp@3656 1837 st->print_cr(" - cache: " INTPTR_FORMAT, cache());
coleenp@3656 1838 st->print_cr(" - resolved_references: " INTPTR_FORMAT, resolved_references());
coleenp@3656 1839 st->print_cr(" - reference_map: " INTPTR_FORMAT, reference_map());
coleenp@3656 1840
coleenp@3656 1841 for (int index = 1; index < length(); index++) { // Index 0 is unused
coleenp@3656 1842 ((ConstantPool*)this)->print_entry_on(index, st);
coleenp@3656 1843 switch (tag_at(index).value()) {
coleenp@3656 1844 case JVM_CONSTANT_Long :
coleenp@3656 1845 case JVM_CONSTANT_Double :
coleenp@3656 1846 index++; // Skip entry following eigth-byte constant
coleenp@3656 1847 }
coleenp@3656 1848
coleenp@3656 1849 }
coleenp@3656 1850 st->cr();
coleenp@3656 1851 }
coleenp@3656 1852
coleenp@3656 1853 // Print one constant pool entry
coleenp@3656 1854 void ConstantPool::print_entry_on(const int index, outputStream* st) {
coleenp@3656 1855 EXCEPTION_MARK;
coleenp@3656 1856 st->print(" - %3d : ", index);
coleenp@3656 1857 tag_at(index).print_on(st);
coleenp@3656 1858 st->print(" : ");
coleenp@3656 1859 switch (tag_at(index).value()) {
coleenp@3656 1860 case JVM_CONSTANT_Class :
coleenp@3656 1861 { Klass* k = klass_at(index, CATCH);
coleenp@3656 1862 k->print_value_on(st);
coleenp@3656 1863 st->print(" {0x%lx}", (address)k);
coleenp@3656 1864 }
coleenp@3656 1865 break;
coleenp@3656 1866 case JVM_CONSTANT_Fieldref :
coleenp@3656 1867 case JVM_CONSTANT_Methodref :
coleenp@3656 1868 case JVM_CONSTANT_InterfaceMethodref :
coleenp@3656 1869 st->print("klass_index=%d", uncached_klass_ref_index_at(index));
coleenp@3656 1870 st->print(" name_and_type_index=%d", uncached_name_and_type_ref_index_at(index));
coleenp@3656 1871 break;
coleenp@3656 1872 case JVM_CONSTANT_String :
coleenp@3656 1873 unresolved_string_at(index)->print_value_on(st);
coleenp@3656 1874 break;
coleenp@3656 1875 case JVM_CONSTANT_Object : {
coleenp@3656 1876 oop anObj = object_at(index);
coleenp@3656 1877 anObj->print_value_on(st);
coleenp@3656 1878 st->print(" {0x%lx}", (address)anObj);
coleenp@3656 1879 } break;
coleenp@3656 1880 case JVM_CONSTANT_Integer :
coleenp@3656 1881 st->print("%d", int_at(index));
coleenp@3656 1882 break;
coleenp@3656 1883 case JVM_CONSTANT_Float :
coleenp@3656 1884 st->print("%f", float_at(index));
coleenp@3656 1885 break;
coleenp@3656 1886 case JVM_CONSTANT_Long :
coleenp@3656 1887 st->print_jlong(long_at(index));
coleenp@3656 1888 break;
coleenp@3656 1889 case JVM_CONSTANT_Double :
coleenp@3656 1890 st->print("%lf", double_at(index));
coleenp@3656 1891 break;
coleenp@3656 1892 case JVM_CONSTANT_NameAndType :
coleenp@3656 1893 st->print("name_index=%d", name_ref_index_at(index));
coleenp@3656 1894 st->print(" signature_index=%d", signature_ref_index_at(index));
coleenp@3656 1895 break;
coleenp@3656 1896 case JVM_CONSTANT_Utf8 :
coleenp@3656 1897 symbol_at(index)->print_value_on(st);
coleenp@3656 1898 break;
coleenp@3656 1899 case JVM_CONSTANT_UnresolvedClass : // fall-through
coleenp@3656 1900 case JVM_CONSTANT_UnresolvedClassInError: {
coleenp@3656 1901 // unresolved_klass_at requires lock or safe world.
coleenp@3656 1902 CPSlot entry = slot_at(index);
coleenp@3656 1903 if (entry.is_resolved()) {
coleenp@3656 1904 entry.get_klass()->print_value_on(st);
coleenp@3656 1905 } else {
coleenp@3656 1906 entry.get_symbol()->print_value_on(st);
coleenp@3656 1907 }
coleenp@3656 1908 }
coleenp@3656 1909 break;
coleenp@3656 1910 case JVM_CONSTANT_MethodHandle :
coleenp@3656 1911 case JVM_CONSTANT_MethodHandleInError :
coleenp@3656 1912 st->print("ref_kind=%d", method_handle_ref_kind_at(index));
coleenp@3656 1913 st->print(" ref_index=%d", method_handle_index_at(index));
coleenp@3656 1914 break;
coleenp@3656 1915 case JVM_CONSTANT_MethodType :
coleenp@3656 1916 case JVM_CONSTANT_MethodTypeInError :
coleenp@3656 1917 st->print("signature_index=%d", method_type_index_at(index));
coleenp@3656 1918 break;
coleenp@3656 1919 case JVM_CONSTANT_InvokeDynamic :
coleenp@3656 1920 {
coleenp@3656 1921 st->print("bootstrap_method_index=%d", invoke_dynamic_bootstrap_method_ref_index_at(index));
coleenp@3656 1922 st->print(" name_and_type_index=%d", invoke_dynamic_name_and_type_ref_index_at(index));
coleenp@3656 1923 int argc = invoke_dynamic_argument_count_at(index);
coleenp@3656 1924 if (argc > 0) {
coleenp@3656 1925 for (int arg_i = 0; arg_i < argc; arg_i++) {
coleenp@3656 1926 int arg = invoke_dynamic_argument_index_at(index, arg_i);
coleenp@3656 1927 st->print((arg_i == 0 ? " arguments={%d" : ", %d"), arg);
coleenp@3656 1928 }
coleenp@3656 1929 st->print("}");
coleenp@3656 1930 }
coleenp@3656 1931 }
coleenp@3656 1932 break;
coleenp@3656 1933 default:
coleenp@3656 1934 ShouldNotReachHere();
coleenp@3656 1935 break;
coleenp@3656 1936 }
coleenp@3656 1937 st->cr();
coleenp@3656 1938 }
coleenp@3656 1939
coleenp@3656 1940 void ConstantPool::print_value_on(outputStream* st) const {
coleenp@3656 1941 assert(is_constantPool(), "must be constantPool");
coleenp@3656 1942 st->print("constant pool [%d]", length());
coleenp@3656 1943 if (has_pseudo_string()) st->print("/pseudo_string");
coleenp@3656 1944 if (has_invokedynamic()) st->print("/invokedynamic");
coleenp@3656 1945 if (has_preresolution()) st->print("/preresolution");
coleenp@3656 1946 if (operands() != NULL) st->print("/operands[%d]", operands()->length());
coleenp@3656 1947 print_address_on(st);
coleenp@3656 1948 st->print(" for ");
coleenp@3656 1949 pool_holder()->print_value_on(st);
coleenp@3656 1950 if (pool_holder() != NULL) {
coleenp@3656 1951 bool extra = (InstanceKlass::cast(pool_holder())->constants() != this);
coleenp@3656 1952 if (extra) st->print(" (extra)");
coleenp@3656 1953 }
coleenp@3656 1954 if (cache() != NULL) {
coleenp@3656 1955 st->print(" cache=" PTR_FORMAT, cache());
coleenp@3656 1956 }
coleenp@3656 1957 }
coleenp@3656 1958
coleenp@3656 1959
coleenp@3656 1960 // Verification
coleenp@3656 1961
coleenp@3656 1962 void ConstantPool::verify_on(outputStream* st) {
coleenp@3656 1963 guarantee(is_constantPool(), "object must be constant pool");
coleenp@3656 1964 for (int i = 0; i< length(); i++) {
coleenp@3656 1965 constantTag tag = tag_at(i);
coleenp@3656 1966 CPSlot entry = slot_at(i);
coleenp@3656 1967 if (tag.is_klass()) {
coleenp@3656 1968 if (entry.is_resolved()) {
coleenp@3656 1969 guarantee(entry.get_klass()->is_metadata(), "should be metadata");
coleenp@3656 1970 guarantee(entry.get_klass()->is_klass(), "should be klass");
coleenp@3656 1971 }
coleenp@3656 1972 } else if (tag.is_unresolved_klass()) {
coleenp@3656 1973 if (entry.is_resolved()) {
coleenp@3656 1974 guarantee(entry.get_klass()->is_metadata(), "should be metadata");
coleenp@3656 1975 guarantee(entry.get_klass()->is_klass(), "should be klass");
coleenp@3656 1976 }
coleenp@3656 1977 } else if (tag.is_symbol()) {
coleenp@3656 1978 guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count");
coleenp@3656 1979 } else if (tag.is_string()) {
coleenp@3656 1980 guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count");
coleenp@3656 1981 }
coleenp@3656 1982 }
coleenp@3656 1983 if (cache() != NULL) {
coleenp@3656 1984 // Note: cache() can be NULL before a class is completely setup or
coleenp@3656 1985 // in temporary constant pools used during constant pool merging
coleenp@3656 1986 guarantee(cache()->is_metadata(), "should be metadata");
coleenp@3656 1987 guarantee(cache()->is_constantPoolCache(), "should be constant pool cache");
coleenp@3656 1988 }
coleenp@3656 1989 if (pool_holder() != NULL) {
coleenp@3656 1990 // Note: pool_holder() can be NULL in temporary constant pools
coleenp@3656 1991 // used during constant pool merging
coleenp@3656 1992 guarantee(pool_holder()->is_metadata(), "should be metadata");
coleenp@3656 1993 guarantee(pool_holder()->is_klass(), "should be klass");
coleenp@3656 1994 }
coleenp@3656 1995 }
coleenp@3656 1996
coleenp@3656 1997
coleenp@2069 1998 void SymbolHashMap::add_entry(Symbol* sym, u2 value) {
duke@0 1999 char *str = sym->as_utf8();
duke@0 2000 unsigned int hash = compute_hash(str, sym->utf8_length());
duke@0 2001 unsigned int index = hash % table_size();
duke@0 2002
duke@0 2003 // check if already in map
duke@0 2004 // we prefer the first entry since it is more likely to be what was used in
duke@0 2005 // the class file
duke@0 2006 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) {
duke@0 2007 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@0 2008 if (en->hash() == hash && en->symbol() == sym) {
duke@0 2009 return; // already there
duke@0 2010 }
duke@0 2011 }
duke@0 2012
duke@0 2013 SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value);
duke@0 2014 entry->set_next(bucket(index));
duke@0 2015 _buckets[index].set_entry(entry);
duke@0 2016 assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@0 2017 }
duke@0 2018
coleenp@2069 2019 SymbolHashMapEntry* SymbolHashMap::find_entry(Symbol* sym) {
duke@0 2020 assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL");
duke@0 2021 char *str = sym->as_utf8();
duke@0 2022 int len = sym->utf8_length();
duke@0 2023 unsigned int hash = SymbolHashMap::compute_hash(str, len);
duke@0 2024 unsigned int index = hash % table_size();
duke@0 2025 for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) {
duke@0 2026 assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL");
duke@0 2027 if (en->hash() == hash && en->symbol() == sym) {
duke@0 2028 return en;
duke@0 2029 }
duke@0 2030 }
duke@0 2031 return NULL;
duke@0 2032 }