Thu, 26 Sep 2013 10:25:02 -0400
7195622: CheckUnhandledOops has limited usefulness now
Summary: Enable CHECK_UNHANDLED_OOPS in fastdebug builds across all supported platforms.
Reviewed-by: coleenp, hseigel, dholmes, stefank, twisti, ihse, rdurbin
Contributed-by: lois.foltan@oracle.com
duke@435 | 1 | /* |
coleenp@4466 | 2 | * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #include "precompiled.hpp" |
coleenp@4037 | 26 | #include "classfile/classLoaderData.hpp" |
stefank@2314 | 27 | #include "classfile/javaClasses.hpp" |
coleenp@4490 | 28 | #include "classfile/metadataOnStackMark.hpp" |
stefank@2314 | 29 | #include "classfile/symbolTable.hpp" |
stefank@2314 | 30 | #include "classfile/systemDictionary.hpp" |
stefank@2314 | 31 | #include "classfile/vmSymbols.hpp" |
stefank@2314 | 32 | #include "interpreter/linkResolver.hpp" |
acorn@4497 | 33 | #include "memory/heapInspection.hpp" |
coleenp@4037 | 34 | #include "memory/metadataFactory.hpp" |
stefank@2314 | 35 | #include "memory/oopFactory.hpp" |
coleenp@4037 | 36 | #include "oops/constantPool.hpp" |
stefank@2314 | 37 | #include "oops/instanceKlass.hpp" |
stefank@2314 | 38 | #include "oops/objArrayKlass.hpp" |
stefank@2314 | 39 | #include "runtime/fieldType.hpp" |
stefank@2314 | 40 | #include "runtime/init.hpp" |
coleenp@4037 | 41 | #include "runtime/javaCalls.hpp" |
stefank@2314 | 42 | #include "runtime/signature.hpp" |
iklam@4984 | 43 | #include "runtime/synchronizer.hpp" |
stefank@2314 | 44 | #include "runtime/vframe.hpp" |
duke@435 | 45 | |
coleenp@4037 | 46 | ConstantPool* ConstantPool::allocate(ClassLoaderData* loader_data, int length, TRAPS) { |
coleenp@4037 | 47 | // Tags are RW but comment below applies to tags also. |
coleenp@4037 | 48 | Array<u1>* tags = MetadataFactory::new_writeable_array<u1>(loader_data, length, 0, CHECK_NULL); |
coleenp@4037 | 49 | |
coleenp@4037 | 50 | int size = ConstantPool::size(length); |
coleenp@4037 | 51 | |
coleenp@4037 | 52 | // CDS considerations: |
coleenp@4037 | 53 | // Allocate read-write but may be able to move to read-only at dumping time |
coleenp@4037 | 54 | // if all the klasses are resolved. The only other field that is writable is |
coleenp@4037 | 55 | // the resolved_references array, which is recreated at startup time. |
coleenp@4037 | 56 | // But that could be moved to InstanceKlass (although a pain to access from |
coleenp@4037 | 57 | // assembly code). Maybe it could be moved to the cpCache which is RW. |
iklam@5208 | 58 | return new (loader_data, size, false, MetaspaceObj::ConstantPoolType, THREAD) ConstantPool(tags); |
coleenp@4037 | 59 | } |
coleenp@4037 | 60 | |
coleenp@4037 | 61 | ConstantPool::ConstantPool(Array<u1>* tags) { |
coleenp@4037 | 62 | set_length(tags->length()); |
coleenp@4037 | 63 | set_tags(NULL); |
coleenp@4037 | 64 | set_cache(NULL); |
coleenp@4037 | 65 | set_reference_map(NULL); |
coleenp@4037 | 66 | set_resolved_references(NULL); |
coleenp@4037 | 67 | set_operands(NULL); |
coleenp@4037 | 68 | set_pool_holder(NULL); |
coleenp@4037 | 69 | set_flags(0); |
coleenp@4490 | 70 | |
coleenp@4037 | 71 | // only set to non-zero if constant pool is merged by RedefineClasses |
coleenp@4466 | 72 | set_version(0); |
coleenp@4037 | 73 | |
coleenp@4037 | 74 | // initialize tag array |
coleenp@4037 | 75 | int length = tags->length(); |
coleenp@4037 | 76 | for (int index = 0; index < length; index++) { |
coleenp@4037 | 77 | tags->at_put(index, JVM_CONSTANT_Invalid); |
coleenp@4037 | 78 | } |
coleenp@4037 | 79 | set_tags(tags); |
coleenp@4037 | 80 | } |
coleenp@4037 | 81 | |
coleenp@4037 | 82 | void ConstantPool::deallocate_contents(ClassLoaderData* loader_data) { |
coleenp@4037 | 83 | MetadataFactory::free_metadata(loader_data, cache()); |
coleenp@4037 | 84 | set_cache(NULL); |
coleenp@4037 | 85 | MetadataFactory::free_array<jushort>(loader_data, operands()); |
coleenp@4037 | 86 | set_operands(NULL); |
coleenp@4037 | 87 | |
coleenp@4037 | 88 | release_C_heap_structures(); |
coleenp@4037 | 89 | |
coleenp@4037 | 90 | // free tag array |
coleenp@4037 | 91 | MetadataFactory::free_array<u1>(loader_data, tags()); |
coleenp@4037 | 92 | set_tags(NULL); |
coleenp@4037 | 93 | } |
coleenp@4037 | 94 | |
coleenp@4037 | 95 | void ConstantPool::release_C_heap_structures() { |
coleenp@4037 | 96 | // walk constant pool and decrement symbol reference counts |
coleenp@4037 | 97 | unreference_symbols(); |
coleenp@4037 | 98 | } |
coleenp@4037 | 99 | |
coleenp@4037 | 100 | objArrayOop ConstantPool::resolved_references() const { |
coleenp@4037 | 101 | return (objArrayOop)JNIHandles::resolve(_resolved_references); |
coleenp@4037 | 102 | } |
coleenp@4037 | 103 | |
coleenp@4037 | 104 | // Create resolved_references array and mapping array for original cp indexes |
coleenp@4037 | 105 | // The ldc bytecode was rewritten to have the resolved reference array index so need a way |
coleenp@4037 | 106 | // to map it back for resolving and some unlikely miscellaneous uses. |
coleenp@4037 | 107 | // The objects created by invokedynamic are appended to this list. |
coleenp@4037 | 108 | void ConstantPool::initialize_resolved_references(ClassLoaderData* loader_data, |
coleenp@4037 | 109 | intStack reference_map, |
coleenp@4037 | 110 | int constant_pool_map_length, |
coleenp@5753 | 111 | TRAPS) { |
coleenp@4037 | 112 | // Initialized the resolved object cache. |
coleenp@4037 | 113 | int map_length = reference_map.length(); |
coleenp@4037 | 114 | if (map_length > 0) { |
coleenp@4037 | 115 | // Only need mapping back to constant pool entries. The map isn't used for |
coleenp@5753 | 116 | // invokedynamic resolved_reference entries. For invokedynamic entries, |
coleenp@5753 | 117 | // the constant pool cache index has the mapping back to both the constant |
coleenp@5753 | 118 | // pool and to the resolved reference index. |
coleenp@4037 | 119 | if (constant_pool_map_length > 0) { |
coleenp@5753 | 120 | Array<u2>* om = MetadataFactory::new_array<u2>(loader_data, constant_pool_map_length, CHECK); |
coleenp@4037 | 121 | |
coleenp@4037 | 122 | for (int i = 0; i < constant_pool_map_length; i++) { |
coleenp@4037 | 123 | int x = reference_map.at(i); |
coleenp@4037 | 124 | assert(x == (int)(jushort) x, "klass index is too big"); |
coleenp@4037 | 125 | om->at_put(i, (jushort)x); |
coleenp@4037 | 126 | } |
coleenp@4037 | 127 | set_reference_map(om); |
coleenp@4037 | 128 | } |
coleenp@4037 | 129 | |
coleenp@4037 | 130 | // Create Java array for holding resolved strings, methodHandles, |
coleenp@4037 | 131 | // methodTypes, invokedynamic and invokehandle appendix objects, etc. |
coleenp@4037 | 132 | objArrayOop stom = oopFactory::new_objArray(SystemDictionary::Object_klass(), map_length, CHECK); |
coleenp@4037 | 133 | Handle refs_handle (THREAD, (oop)stom); // must handleize. |
coleenp@4037 | 134 | set_resolved_references(loader_data->add_handle(refs_handle)); |
coleenp@4037 | 135 | } |
coleenp@4037 | 136 | } |
coleenp@4037 | 137 | |
coleenp@4037 | 138 | // CDS support. Create a new resolved_references array. |
coleenp@4037 | 139 | void ConstantPool::restore_unshareable_info(TRAPS) { |
coleenp@4045 | 140 | |
coleenp@4045 | 141 | // restore the C++ vtable from the shared archive |
coleenp@4045 | 142 | restore_vtable(); |
coleenp@4045 | 143 | |
coleenp@4037 | 144 | if (SystemDictionary::Object_klass_loaded()) { |
coleenp@4037 | 145 | // Recreate the object array and add to ClassLoaderData. |
coleenp@4037 | 146 | int map_length = resolved_reference_length(); |
coleenp@4037 | 147 | if (map_length > 0) { |
coleenp@4037 | 148 | objArrayOop stom = oopFactory::new_objArray(SystemDictionary::Object_klass(), map_length, CHECK); |
coleenp@4037 | 149 | Handle refs_handle (THREAD, (oop)stom); // must handleize. |
coleenp@4037 | 150 | |
coleenp@4037 | 151 | ClassLoaderData* loader_data = pool_holder()->class_loader_data(); |
coleenp@4037 | 152 | set_resolved_references(loader_data->add_handle(refs_handle)); |
coleenp@4037 | 153 | } |
coleenp@4037 | 154 | } |
coleenp@4037 | 155 | } |
coleenp@4037 | 156 | |
coleenp@4037 | 157 | void ConstantPool::remove_unshareable_info() { |
coleenp@4037 | 158 | // Resolved references are not in the shared archive. |
coleenp@4037 | 159 | // Save the length for restoration. It is not necessarily the same length |
coleenp@4037 | 160 | // as reference_map.length() if invokedynamic is saved. |
coleenp@4037 | 161 | set_resolved_reference_length( |
coleenp@4037 | 162 | resolved_references() != NULL ? resolved_references()->length() : 0); |
coleenp@4037 | 163 | set_resolved_references(NULL); |
iklam@4984 | 164 | } |
iklam@4984 | 165 | |
iklam@4984 | 166 | oop ConstantPool::lock() { |
iklam@4984 | 167 | if (_pool_holder) { |
iklam@4984 | 168 | // We re-use the _pool_holder's init_lock to reduce footprint. |
iklam@4984 | 169 | // Notes on deadlocks: |
iklam@4984 | 170 | // [1] This lock is a Java oop, so it can be recursively locked by |
iklam@4984 | 171 | // the same thread without self-deadlocks. |
iklam@4984 | 172 | // [2] Deadlock will happen if there is circular dependency between |
iklam@4984 | 173 | // the <clinit> of two Java classes. However, in this case, |
iklam@4984 | 174 | // the deadlock would have happened long before we reach |
iklam@4984 | 175 | // ConstantPool::lock(), so reusing init_lock does not |
iklam@4984 | 176 | // increase the possibility of deadlock. |
iklam@4984 | 177 | return _pool_holder->init_lock(); |
iklam@4984 | 178 | } else { |
iklam@4984 | 179 | return NULL; |
iklam@4984 | 180 | } |
coleenp@4037 | 181 | } |
coleenp@4037 | 182 | |
coleenp@4037 | 183 | int ConstantPool::cp_to_object_index(int cp_index) { |
coleenp@4037 | 184 | // this is harder don't do this so much. |
coleenp@5753 | 185 | int i = reference_map()->find(cp_index); |
coleenp@5753 | 186 | // We might not find the index for jsr292 call. |
coleenp@5753 | 187 | return (i < 0) ? _no_index_sentinel : i; |
coleenp@4037 | 188 | } |
coleenp@4037 | 189 | |
coleenp@4037 | 190 | Klass* ConstantPool::klass_at_impl(constantPoolHandle this_oop, int which, TRAPS) { |
coleenp@4037 | 191 | // A resolved constantPool entry will contain a Klass*, otherwise a Symbol*. |
duke@435 | 192 | // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and |
duke@435 | 193 | // tag is not updated atomicly. |
coleenp@4037 | 194 | |
coleenp@2497 | 195 | CPSlot entry = this_oop->slot_at(which); |
coleenp@4037 | 196 | if (entry.is_resolved()) { |
coleenp@4037 | 197 | assert(entry.get_klass()->is_klass(), "must be"); |
duke@435 | 198 | // Already resolved - return entry. |
coleenp@4037 | 199 | return entry.get_klass(); |
duke@435 | 200 | } |
duke@435 | 201 | |
duke@435 | 202 | // Acquire lock on constant oop while doing update. After we get the lock, we check if another object |
duke@435 | 203 | // already has updated the object |
duke@435 | 204 | assert(THREAD->is_Java_thread(), "must be a Java thread"); |
duke@435 | 205 | bool do_resolve = false; |
duke@435 | 206 | bool in_error = false; |
duke@435 | 207 | |
coleenp@4037 | 208 | // Create a handle for the mirror. This will preserve the resolved class |
coleenp@4037 | 209 | // until the loader_data is registered. |
coleenp@4037 | 210 | Handle mirror_handle; |
coleenp@4037 | 211 | |
coleenp@2497 | 212 | Symbol* name = NULL; |
duke@435 | 213 | Handle loader; |
iklam@4984 | 214 | { |
iklam@4984 | 215 | oop cplock = this_oop->lock(); |
iklam@4984 | 216 | ObjectLocker ol(cplock , THREAD, cplock != NULL); |
duke@435 | 217 | |
duke@435 | 218 | if (this_oop->tag_at(which).is_unresolved_klass()) { |
duke@435 | 219 | if (this_oop->tag_at(which).is_unresolved_klass_in_error()) { |
duke@435 | 220 | in_error = true; |
duke@435 | 221 | } else { |
duke@435 | 222 | do_resolve = true; |
coleenp@2497 | 223 | name = this_oop->unresolved_klass_at(which); |
coleenp@4251 | 224 | loader = Handle(THREAD, this_oop->pool_holder()->class_loader()); |
duke@435 | 225 | } |
duke@435 | 226 | } |
duke@435 | 227 | } // unlocking constantPool |
duke@435 | 228 | |
duke@435 | 229 | |
duke@435 | 230 | // The original attempt to resolve this constant pool entry failed so find the |
duke@435 | 231 | // original error and throw it again (JVMS 5.4.3). |
duke@435 | 232 | if (in_error) { |
coleenp@2497 | 233 | Symbol* error = SystemDictionary::find_resolution_error(this_oop, which); |
coleenp@2497 | 234 | guarantee(error != (Symbol*)NULL, "tag mismatch with resolution error table"); |
duke@435 | 235 | ResourceMark rm; |
duke@435 | 236 | // exception text will be the class name |
duke@435 | 237 | const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); |
duke@435 | 238 | THROW_MSG_0(error, className); |
duke@435 | 239 | } |
duke@435 | 240 | |
duke@435 | 241 | if (do_resolve) { |
duke@435 | 242 | // this_oop must be unlocked during resolve_or_fail |
coleenp@4251 | 243 | oop protection_domain = this_oop->pool_holder()->protection_domain(); |
duke@435 | 244 | Handle h_prot (THREAD, protection_domain); |
coleenp@4037 | 245 | Klass* k_oop = SystemDictionary::resolve_or_fail(name, loader, h_prot, true, THREAD); |
duke@435 | 246 | KlassHandle k; |
duke@435 | 247 | if (!HAS_PENDING_EXCEPTION) { |
duke@435 | 248 | k = KlassHandle(THREAD, k_oop); |
coleenp@4037 | 249 | // preserve the resolved klass. |
coleenp@4037 | 250 | mirror_handle = Handle(THREAD, k_oop->java_mirror()); |
duke@435 | 251 | // Do access check for klasses |
duke@435 | 252 | verify_constant_pool_resolve(this_oop, k, THREAD); |
duke@435 | 253 | } |
duke@435 | 254 | |
duke@435 | 255 | // Failed to resolve class. We must record the errors so that subsequent attempts |
duke@435 | 256 | // to resolve this constant pool entry fail with the same error (JVMS 5.4.3). |
duke@435 | 257 | if (HAS_PENDING_EXCEPTION) { |
duke@435 | 258 | ResourceMark rm; |
coleenp@4037 | 259 | Symbol* error = PENDING_EXCEPTION->klass()->name(); |
duke@435 | 260 | |
duke@435 | 261 | bool throw_orig_error = false; |
duke@435 | 262 | { |
iklam@4984 | 263 | oop cplock = this_oop->lock(); |
iklam@4984 | 264 | ObjectLocker ol(cplock, THREAD, cplock != NULL); |
duke@435 | 265 | |
duke@435 | 266 | // some other thread has beaten us and has resolved the class. |
duke@435 | 267 | if (this_oop->tag_at(which).is_klass()) { |
duke@435 | 268 | CLEAR_PENDING_EXCEPTION; |
duke@435 | 269 | entry = this_oop->resolved_klass_at(which); |
coleenp@4037 | 270 | return entry.get_klass(); |
duke@435 | 271 | } |
duke@435 | 272 | |
duke@435 | 273 | if (!PENDING_EXCEPTION-> |
never@1577 | 274 | is_a(SystemDictionary::LinkageError_klass())) { |
duke@435 | 275 | // Just throw the exception and don't prevent these classes from |
duke@435 | 276 | // being loaded due to virtual machine errors like StackOverflow |
duke@435 | 277 | // and OutOfMemoryError, etc, or if the thread was hit by stop() |
duke@435 | 278 | // Needs clarification to section 5.4.3 of the VM spec (see 6308271) |
duke@435 | 279 | } |
duke@435 | 280 | else if (!this_oop->tag_at(which).is_unresolved_klass_in_error()) { |
duke@435 | 281 | SystemDictionary::add_resolution_error(this_oop, which, error); |
duke@435 | 282 | this_oop->tag_at_put(which, JVM_CONSTANT_UnresolvedClassInError); |
duke@435 | 283 | } else { |
duke@435 | 284 | // some other thread has put the class in error state. |
coleenp@2497 | 285 | error = SystemDictionary::find_resolution_error(this_oop, which); |
coleenp@2497 | 286 | assert(error != NULL, "checking"); |
duke@435 | 287 | throw_orig_error = true; |
duke@435 | 288 | } |
duke@435 | 289 | } // unlocked |
duke@435 | 290 | |
duke@435 | 291 | if (throw_orig_error) { |
duke@435 | 292 | CLEAR_PENDING_EXCEPTION; |
duke@435 | 293 | ResourceMark rm; |
duke@435 | 294 | const char* className = this_oop->unresolved_klass_at(which)->as_C_string(); |
duke@435 | 295 | THROW_MSG_0(error, className); |
duke@435 | 296 | } |
duke@435 | 297 | |
duke@435 | 298 | return 0; |
duke@435 | 299 | } |
duke@435 | 300 | |
coleenp@4037 | 301 | if (TraceClassResolution && !k()->oop_is_array()) { |
duke@435 | 302 | // skip resolving the constant pool so that this code get's |
duke@435 | 303 | // called the next time some bytecodes refer to this class. |
duke@435 | 304 | ResourceMark rm; |
duke@435 | 305 | int line_number = -1; |
duke@435 | 306 | const char * source_file = NULL; |
duke@435 | 307 | if (JavaThread::current()->has_last_Java_frame()) { |
duke@435 | 308 | // try to identify the method which called this function. |
duke@435 | 309 | vframeStream vfst(JavaThread::current()); |
duke@435 | 310 | if (!vfst.at_end()) { |
duke@435 | 311 | line_number = vfst.method()->line_number_from_bci(vfst.bci()); |
coleenp@4251 | 312 | Symbol* s = vfst.method()->method_holder()->source_file_name(); |
duke@435 | 313 | if (s != NULL) { |
duke@435 | 314 | source_file = s->as_C_string(); |
duke@435 | 315 | } |
duke@435 | 316 | } |
duke@435 | 317 | } |
duke@435 | 318 | if (k() != this_oop->pool_holder()) { |
duke@435 | 319 | // only print something if the classes are different |
duke@435 | 320 | if (source_file != NULL) { |
duke@435 | 321 | tty->print("RESOLVE %s %s %s:%d\n", |
coleenp@4251 | 322 | this_oop->pool_holder()->external_name(), |
coleenp@4037 | 323 | InstanceKlass::cast(k())->external_name(), source_file, line_number); |
duke@435 | 324 | } else { |
duke@435 | 325 | tty->print("RESOLVE %s %s\n", |
coleenp@4251 | 326 | this_oop->pool_holder()->external_name(), |
coleenp@4037 | 327 | InstanceKlass::cast(k())->external_name()); |
duke@435 | 328 | } |
duke@435 | 329 | } |
duke@435 | 330 | return k(); |
duke@435 | 331 | } else { |
iklam@4984 | 332 | oop cplock = this_oop->lock(); |
iklam@4984 | 333 | ObjectLocker ol(cplock, THREAD, cplock != NULL); |
duke@435 | 334 | // Only updated constant pool - if it is resolved. |
duke@435 | 335 | do_resolve = this_oop->tag_at(which).is_unresolved_klass(); |
duke@435 | 336 | if (do_resolve) { |
coleenp@4251 | 337 | ClassLoaderData* this_key = this_oop->pool_holder()->class_loader_data(); |
coleenp@4304 | 338 | this_key->record_dependency(k(), CHECK_NULL); // Can throw OOM |
duke@435 | 339 | this_oop->klass_at_put(which, k()); |
duke@435 | 340 | } |
duke@435 | 341 | } |
duke@435 | 342 | } |
duke@435 | 343 | |
duke@435 | 344 | entry = this_oop->resolved_klass_at(which); |
coleenp@4037 | 345 | assert(entry.is_resolved() && entry.get_klass()->is_klass(), "must be resolved at this point"); |
coleenp@4037 | 346 | return entry.get_klass(); |
duke@435 | 347 | } |
duke@435 | 348 | |
duke@435 | 349 | |
coleenp@4037 | 350 | // Does not update ConstantPool* - to avoid any exception throwing. Used |
duke@435 | 351 | // by compiler and exception handling. Also used to avoid classloads for |
duke@435 | 352 | // instanceof operations. Returns NULL if the class has not been loaded or |
duke@435 | 353 | // if the verification of constant pool failed |
coleenp@4037 | 354 | Klass* ConstantPool::klass_at_if_loaded(constantPoolHandle this_oop, int which) { |
coleenp@2497 | 355 | CPSlot entry = this_oop->slot_at(which); |
coleenp@4037 | 356 | if (entry.is_resolved()) { |
coleenp@4037 | 357 | assert(entry.get_klass()->is_klass(), "must be"); |
coleenp@4037 | 358 | return entry.get_klass(); |
duke@435 | 359 | } else { |
coleenp@4037 | 360 | assert(entry.is_unresolved(), "must be either symbol or klass"); |
duke@435 | 361 | Thread *thread = Thread::current(); |
coleenp@2497 | 362 | Symbol* name = entry.get_symbol(); |
coleenp@4251 | 363 | oop loader = this_oop->pool_holder()->class_loader(); |
coleenp@4251 | 364 | oop protection_domain = this_oop->pool_holder()->protection_domain(); |
duke@435 | 365 | Handle h_prot (thread, protection_domain); |
duke@435 | 366 | Handle h_loader (thread, loader); |
coleenp@4037 | 367 | Klass* k = SystemDictionary::find(name, h_loader, h_prot, thread); |
duke@435 | 368 | |
duke@435 | 369 | if (k != NULL) { |
duke@435 | 370 | // Make sure that resolving is legal |
duke@435 | 371 | EXCEPTION_MARK; |
duke@435 | 372 | KlassHandle klass(THREAD, k); |
duke@435 | 373 | // return NULL if verification fails |
duke@435 | 374 | verify_constant_pool_resolve(this_oop, klass, THREAD); |
duke@435 | 375 | if (HAS_PENDING_EXCEPTION) { |
duke@435 | 376 | CLEAR_PENDING_EXCEPTION; |
duke@435 | 377 | return NULL; |
duke@435 | 378 | } |
duke@435 | 379 | return klass(); |
duke@435 | 380 | } else { |
duke@435 | 381 | return k; |
duke@435 | 382 | } |
duke@435 | 383 | } |
duke@435 | 384 | } |
duke@435 | 385 | |
duke@435 | 386 | |
coleenp@4037 | 387 | Klass* ConstantPool::klass_ref_at_if_loaded(constantPoolHandle this_oop, int which) { |
duke@435 | 388 | return klass_at_if_loaded(this_oop, this_oop->klass_ref_index_at(which)); |
duke@435 | 389 | } |
duke@435 | 390 | |
duke@435 | 391 | |
coleenp@4037 | 392 | Method* ConstantPool::method_at_if_loaded(constantPoolHandle cpool, |
twisti@3969 | 393 | int which) { |
brutisso@3489 | 394 | if (cpool->cache() == NULL) return NULL; // nothing to load yet |
coleenp@4037 | 395 | int cache_index = decode_cpcache_index(which, true); |
jrose@2982 | 396 | if (!(cache_index >= 0 && cache_index < cpool->cache()->length())) { |
coleenp@4037 | 397 | // FIXME: should be an assert |
jrose@2982 | 398 | if (PrintMiscellaneous && (Verbose||WizardMode)) { |
twisti@3969 | 399 | tty->print_cr("bad operand %d in:", which); cpool->print(); |
jrose@2982 | 400 | } |
jrose@2982 | 401 | return NULL; |
jrose@2982 | 402 | } |
jrose@2982 | 403 | ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
twisti@3969 | 404 | return e->method_if_resolved(cpool); |
twisti@3969 | 405 | } |
twisti@3969 | 406 | |
twisti@3969 | 407 | |
coleenp@4037 | 408 | bool ConstantPool::has_appendix_at_if_loaded(constantPoolHandle cpool, int which) { |
twisti@3969 | 409 | if (cpool->cache() == NULL) return false; // nothing to load yet |
coleenp@4037 | 410 | int cache_index = decode_cpcache_index(which, true); |
coleenp@4037 | 411 | ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
twisti@3969 | 412 | return e->has_appendix(); |
twisti@3969 | 413 | } |
twisti@3969 | 414 | |
coleenp@4037 | 415 | oop ConstantPool::appendix_at_if_loaded(constantPoolHandle cpool, int which) { |
twisti@3969 | 416 | if (cpool->cache() == NULL) return NULL; // nothing to load yet |
coleenp@4037 | 417 | int cache_index = decode_cpcache_index(which, true); |
coleenp@4037 | 418 | ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
coleenp@4037 | 419 | return e->appendix_if_resolved(cpool); |
jrose@2982 | 420 | } |
jrose@2982 | 421 | |
jrose@2982 | 422 | |
twisti@4133 | 423 | bool ConstantPool::has_method_type_at_if_loaded(constantPoolHandle cpool, int which) { |
twisti@4133 | 424 | if (cpool->cache() == NULL) return false; // nothing to load yet |
twisti@4133 | 425 | int cache_index = decode_cpcache_index(which, true); |
twisti@4133 | 426 | ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
twisti@4133 | 427 | return e->has_method_type(); |
twisti@4133 | 428 | } |
twisti@4133 | 429 | |
twisti@4133 | 430 | oop ConstantPool::method_type_at_if_loaded(constantPoolHandle cpool, int which) { |
twisti@4133 | 431 | if (cpool->cache() == NULL) return NULL; // nothing to load yet |
twisti@4133 | 432 | int cache_index = decode_cpcache_index(which, true); |
twisti@4133 | 433 | ConstantPoolCacheEntry* e = cpool->cache()->entry_at(cache_index); |
twisti@4133 | 434 | return e->method_type_if_resolved(cpool); |
twisti@4133 | 435 | } |
twisti@4133 | 436 | |
twisti@4133 | 437 | |
coleenp@4037 | 438 | Symbol* ConstantPool::impl_name_ref_at(int which, bool uncached) { |
jrose@1161 | 439 | int name_index = name_ref_index_at(impl_name_and_type_ref_index_at(which, uncached)); |
duke@435 | 440 | return symbol_at(name_index); |
duke@435 | 441 | } |
duke@435 | 442 | |
duke@435 | 443 | |
coleenp@4037 | 444 | Symbol* ConstantPool::impl_signature_ref_at(int which, bool uncached) { |
jrose@1161 | 445 | int signature_index = signature_ref_index_at(impl_name_and_type_ref_index_at(which, uncached)); |
duke@435 | 446 | return symbol_at(signature_index); |
duke@435 | 447 | } |
duke@435 | 448 | |
duke@435 | 449 | |
coleenp@4037 | 450 | int ConstantPool::impl_name_and_type_ref_index_at(int which, bool uncached) { |
jrose@1494 | 451 | int i = which; |
jrose@1494 | 452 | if (!uncached && cache() != NULL) { |
coleenp@4037 | 453 | if (ConstantPool::is_invokedynamic_index(which)) { |
coleenp@4037 | 454 | // Invokedynamic index is index into resolved_references |
coleenp@4037 | 455 | int pool_index = invokedynamic_cp_cache_entry_at(which)->constant_pool_index(); |
jrose@2742 | 456 | pool_index = invoke_dynamic_name_and_type_ref_index_at(pool_index); |
jrose@2015 | 457 | assert(tag_at(pool_index).is_name_and_type(), ""); |
jrose@2015 | 458 | return pool_index; |
jrose@2015 | 459 | } |
jrose@1494 | 460 | // change byte-ordering and go via cache |
jrose@1494 | 461 | i = remap_instruction_operand_from_cache(which); |
jrose@1494 | 462 | } else { |
jrose@2268 | 463 | if (tag_at(which).is_invoke_dynamic()) { |
jrose@2268 | 464 | int pool_index = invoke_dynamic_name_and_type_ref_index_at(which); |
jrose@2268 | 465 | assert(tag_at(pool_index).is_name_and_type(), ""); |
jrose@2268 | 466 | return pool_index; |
jrose@2268 | 467 | } |
jrose@1494 | 468 | } |
jrose@1494 | 469 | assert(tag_at(i).is_field_or_method(), "Corrupted constant pool"); |
jrose@2268 | 470 | assert(!tag_at(i).is_invoke_dynamic(), "Must be handled above"); |
jrose@1494 | 471 | jint ref_index = *int_at_addr(i); |
duke@435 | 472 | return extract_high_short_from_int(ref_index); |
duke@435 | 473 | } |
duke@435 | 474 | |
duke@435 | 475 | |
coleenp@4037 | 476 | int ConstantPool::impl_klass_ref_index_at(int which, bool uncached) { |
coleenp@4037 | 477 | guarantee(!ConstantPool::is_invokedynamic_index(which), |
jrose@1494 | 478 | "an invokedynamic instruction does not have a klass"); |
jrose@1494 | 479 | int i = which; |
jrose@1494 | 480 | if (!uncached && cache() != NULL) { |
jrose@1494 | 481 | // change byte-ordering and go via cache |
jrose@1494 | 482 | i = remap_instruction_operand_from_cache(which); |
jrose@1494 | 483 | } |
jrose@1494 | 484 | assert(tag_at(i).is_field_or_method(), "Corrupted constant pool"); |
jrose@1494 | 485 | jint ref_index = *int_at_addr(i); |
duke@435 | 486 | return extract_low_short_from_int(ref_index); |
duke@435 | 487 | } |
duke@435 | 488 | |
duke@435 | 489 | |
jrose@1161 | 490 | |
coleenp@4037 | 491 | int ConstantPool::remap_instruction_operand_from_cache(int operand) { |
jrose@1920 | 492 | int cpc_index = operand; |
jrose@1920 | 493 | DEBUG_ONLY(cpc_index -= CPCACHE_INDEX_TAG); |
jrose@1920 | 494 | assert((int)(u2)cpc_index == cpc_index, "clean u2"); |
jrose@1494 | 495 | int member_index = cache()->entry_at(cpc_index)->constant_pool_index(); |
jrose@1494 | 496 | return member_index; |
jrose@1161 | 497 | } |
jrose@1161 | 498 | |
jrose@1161 | 499 | |
coleenp@4037 | 500 | void ConstantPool::verify_constant_pool_resolve(constantPoolHandle this_oop, KlassHandle k, TRAPS) { |
duke@435 | 501 | if (k->oop_is_instance() || k->oop_is_objArray()) { |
duke@435 | 502 | instanceKlassHandle holder (THREAD, this_oop->pool_holder()); |
coleenp@4142 | 503 | Klass* elem_oop = k->oop_is_instance() ? k() : ObjArrayKlass::cast(k())->bottom_klass(); |
duke@435 | 504 | KlassHandle element (THREAD, elem_oop); |
duke@435 | 505 | |
duke@435 | 506 | // The element type could be a typeArray - we only need the access check if it is |
duke@435 | 507 | // an reference to another class |
duke@435 | 508 | if (element->oop_is_instance()) { |
duke@435 | 509 | LinkResolver::check_klass_accessability(holder, element, CHECK); |
duke@435 | 510 | } |
duke@435 | 511 | } |
duke@435 | 512 | } |
duke@435 | 513 | |
duke@435 | 514 | |
coleenp@4037 | 515 | int ConstantPool::name_ref_index_at(int which_nt) { |
jrose@1161 | 516 | jint ref_index = name_and_type_at(which_nt); |
duke@435 | 517 | return extract_low_short_from_int(ref_index); |
duke@435 | 518 | } |
duke@435 | 519 | |
duke@435 | 520 | |
coleenp@4037 | 521 | int ConstantPool::signature_ref_index_at(int which_nt) { |
jrose@1161 | 522 | jint ref_index = name_and_type_at(which_nt); |
duke@435 | 523 | return extract_high_short_from_int(ref_index); |
duke@435 | 524 | } |
duke@435 | 525 | |
duke@435 | 526 | |
coleenp@4037 | 527 | Klass* ConstantPool::klass_ref_at(int which, TRAPS) { |
duke@435 | 528 | return klass_at(klass_ref_index_at(which), CHECK_NULL); |
duke@435 | 529 | } |
duke@435 | 530 | |
duke@435 | 531 | |
coleenp@4037 | 532 | Symbol* ConstantPool::klass_name_at(int which) { |
duke@435 | 533 | assert(tag_at(which).is_unresolved_klass() || tag_at(which).is_klass(), |
duke@435 | 534 | "Corrupted constant pool"); |
coleenp@4037 | 535 | // A resolved constantPool entry will contain a Klass*, otherwise a Symbol*. |
duke@435 | 536 | // It is not safe to rely on the tag bit's here, since we don't have a lock, and the entry and |
duke@435 | 537 | // tag is not updated atomicly. |
coleenp@2497 | 538 | CPSlot entry = slot_at(which); |
coleenp@4037 | 539 | if (entry.is_resolved()) { |
duke@435 | 540 | // Already resolved - return entry's name. |
coleenp@4037 | 541 | assert(entry.get_klass()->is_klass(), "must be"); |
coleenp@4037 | 542 | return entry.get_klass()->name(); |
duke@435 | 543 | } else { |
coleenp@4037 | 544 | assert(entry.is_unresolved(), "must be either symbol or klass"); |
coleenp@2497 | 545 | return entry.get_symbol(); |
duke@435 | 546 | } |
duke@435 | 547 | } |
duke@435 | 548 | |
coleenp@4037 | 549 | Symbol* ConstantPool::klass_ref_at_noresolve(int which) { |
duke@435 | 550 | jint ref_index = klass_ref_index_at(which); |
duke@435 | 551 | return klass_at_noresolve(ref_index); |
duke@435 | 552 | } |
duke@435 | 553 | |
coleenp@4037 | 554 | Symbol* ConstantPool::uncached_klass_ref_at_noresolve(int which) { |
jrose@1957 | 555 | jint ref_index = uncached_klass_ref_index_at(which); |
jrose@1957 | 556 | return klass_at_noresolve(ref_index); |
jrose@1957 | 557 | } |
jrose@1957 | 558 | |
coleenp@4037 | 559 | char* ConstantPool::string_at_noresolve(int which) { |
coleenp@4037 | 560 | Symbol* s = unresolved_string_at(which); |
coleenp@4037 | 561 | if (s == NULL) { |
coleenp@4037 | 562 | return (char*)"<pseudo-string>"; |
duke@435 | 563 | } else { |
coleenp@4037 | 564 | return unresolved_string_at(which)->as_C_string(); |
duke@435 | 565 | } |
duke@435 | 566 | } |
duke@435 | 567 | |
coleenp@4037 | 568 | BasicType ConstantPool::basic_type_for_signature_at(int which) { |
duke@435 | 569 | return FieldType::basic_type(symbol_at(which)); |
duke@435 | 570 | } |
duke@435 | 571 | |
duke@435 | 572 | |
coleenp@4037 | 573 | void ConstantPool::resolve_string_constants_impl(constantPoolHandle this_oop, TRAPS) { |
duke@435 | 574 | for (int index = 1; index < this_oop->length(); index++) { // Index 0 is unused |
coleenp@4037 | 575 | if (this_oop->tag_at(index).is_string()) { |
duke@435 | 576 | this_oop->string_at(index, CHECK); |
duke@435 | 577 | } |
duke@435 | 578 | } |
duke@435 | 579 | } |
duke@435 | 580 | |
coleenp@4037 | 581 | // Resolve all the classes in the constant pool. If they are all resolved, |
coleenp@4037 | 582 | // the constant pool is read-only. Enhancement: allocate cp entries to |
coleenp@4037 | 583 | // another metaspace, and copy to read-only or read-write space if this |
coleenp@4037 | 584 | // bit is set. |
coleenp@4037 | 585 | bool ConstantPool::resolve_class_constants(TRAPS) { |
coleenp@4037 | 586 | constantPoolHandle cp(THREAD, this); |
coleenp@4037 | 587 | for (int index = 1; index < length(); index++) { // Index 0 is unused |
coleenp@4037 | 588 | if (tag_at(index).is_unresolved_klass() && |
coleenp@4037 | 589 | klass_at_if_loaded(cp, index) == NULL) { |
coleenp@4037 | 590 | return false; |
jrose@2268 | 591 | } |
coleenp@4037 | 592 | } |
coleenp@4037 | 593 | // set_preresolution(); or some bit for future use |
coleenp@4037 | 594 | return true; |
jrose@2268 | 595 | } |
jrose@2268 | 596 | |
coleenp@4037 | 597 | // If resolution for MethodHandle or MethodType fails, save the exception |
coleenp@4037 | 598 | // in the resolution error table, so that the same exception is thrown again. |
coleenp@4037 | 599 | void ConstantPool::save_and_throw_exception(constantPoolHandle this_oop, int which, |
coleenp@4037 | 600 | int tag, TRAPS) { |
coleenp@4037 | 601 | ResourceMark rm; |
coleenp@4037 | 602 | Symbol* error = PENDING_EXCEPTION->klass()->name(); |
iklam@4984 | 603 | oop cplock = this_oop->lock(); |
iklam@4984 | 604 | ObjectLocker ol(cplock, THREAD, cplock != NULL); // lock cpool to change tag. |
coleenp@4037 | 605 | |
coleenp@4037 | 606 | int error_tag = (tag == JVM_CONSTANT_MethodHandle) ? |
coleenp@4037 | 607 | JVM_CONSTANT_MethodHandleInError : JVM_CONSTANT_MethodTypeInError; |
coleenp@4037 | 608 | |
coleenp@4037 | 609 | if (!PENDING_EXCEPTION-> |
coleenp@4037 | 610 | is_a(SystemDictionary::LinkageError_klass())) { |
coleenp@4037 | 611 | // Just throw the exception and don't prevent these classes from |
coleenp@4037 | 612 | // being loaded due to virtual machine errors like StackOverflow |
coleenp@4037 | 613 | // and OutOfMemoryError, etc, or if the thread was hit by stop() |
coleenp@4037 | 614 | // Needs clarification to section 5.4.3 of the VM spec (see 6308271) |
coleenp@4037 | 615 | |
coleenp@4037 | 616 | } else if (this_oop->tag_at(which).value() != error_tag) { |
coleenp@4037 | 617 | SystemDictionary::add_resolution_error(this_oop, which, error); |
coleenp@4037 | 618 | this_oop->tag_at_put(which, error_tag); |
coleenp@4037 | 619 | } else { |
coleenp@4037 | 620 | // some other thread has put the class in error state. |
coleenp@4037 | 621 | error = SystemDictionary::find_resolution_error(this_oop, which); |
coleenp@4037 | 622 | assert(error != NULL, "checking"); |
coleenp@4037 | 623 | CLEAR_PENDING_EXCEPTION; |
coleenp@4037 | 624 | THROW_MSG(error, ""); |
coleenp@4037 | 625 | } |
coleenp@4037 | 626 | } |
coleenp@4037 | 627 | |
coleenp@4037 | 628 | |
coleenp@4037 | 629 | // Called to resolve constants in the constant pool and return an oop. |
coleenp@4037 | 630 | // Some constant pool entries cache their resolved oop. This is also |
coleenp@4037 | 631 | // called to create oops from constants to use in arguments for invokedynamic |
coleenp@4037 | 632 | oop ConstantPool::resolve_constant_at_impl(constantPoolHandle this_oop, int index, int cache_index, TRAPS) { |
jrose@1957 | 633 | oop result_oop = NULL; |
jrose@2268 | 634 | Handle throw_exception; |
jrose@2268 | 635 | |
jrose@2268 | 636 | if (cache_index == _possible_index_sentinel) { |
coleenp@4037 | 637 | // It is possible that this constant is one which is cached in the objects. |
jrose@2268 | 638 | // We'll do a linear search. This should be OK because this usage is rare. |
jrose@2268 | 639 | assert(index > 0, "valid index"); |
coleenp@4037 | 640 | cache_index = this_oop->cp_to_object_index(index); |
jrose@2268 | 641 | } |
jrose@2268 | 642 | assert(cache_index == _no_index_sentinel || cache_index >= 0, ""); |
jrose@2268 | 643 | assert(index == _no_index_sentinel || index >= 0, ""); |
jrose@2268 | 644 | |
jrose@1957 | 645 | if (cache_index >= 0) { |
coleenp@4037 | 646 | result_oop = this_oop->resolved_references()->obj_at(cache_index); |
jrose@1957 | 647 | if (result_oop != NULL) { |
coleenp@4037 | 648 | return result_oop; |
jrose@2268 | 649 | // That was easy... |
jrose@1957 | 650 | } |
coleenp@4037 | 651 | index = this_oop->object_to_cp_index(cache_index); |
jrose@1957 | 652 | } |
jrose@1957 | 653 | |
jrose@2268 | 654 | jvalue prim_value; // temp used only in a few cases below |
jrose@2268 | 655 | |
jrose@1957 | 656 | int tag_value = this_oop->tag_at(index).value(); |
coleenp@4037 | 657 | |
jrose@1957 | 658 | switch (tag_value) { |
jrose@1957 | 659 | |
jrose@1957 | 660 | case JVM_CONSTANT_UnresolvedClass: |
jrose@1957 | 661 | case JVM_CONSTANT_UnresolvedClassInError: |
jrose@1957 | 662 | case JVM_CONSTANT_Class: |
jrose@1957 | 663 | { |
coleenp@4037 | 664 | assert(cache_index == _no_index_sentinel, "should not have been set"); |
coleenp@4037 | 665 | Klass* resolved = klass_at_impl(this_oop, index, CHECK_NULL); |
jrose@1957 | 666 | // ldc wants the java mirror. |
never@2658 | 667 | result_oop = resolved->java_mirror(); |
jrose@1957 | 668 | break; |
jrose@1957 | 669 | } |
jrose@1957 | 670 | |
jrose@1957 | 671 | case JVM_CONSTANT_String: |
coleenp@4037 | 672 | assert(cache_index != _no_index_sentinel, "should have been set"); |
jrose@1957 | 673 | if (this_oop->is_pseudo_string_at(index)) { |
coleenp@4037 | 674 | result_oop = this_oop->pseudo_string_at(index, cache_index); |
jrose@1957 | 675 | break; |
jrose@1957 | 676 | } |
coleenp@4037 | 677 | result_oop = string_at_impl(this_oop, index, cache_index, CHECK_NULL); |
jrose@1957 | 678 | break; |
jrose@1957 | 679 | |
coleenp@4037 | 680 | case JVM_CONSTANT_MethodHandleInError: |
coleenp@4037 | 681 | case JVM_CONSTANT_MethodTypeInError: |
coleenp@4037 | 682 | { |
coleenp@4037 | 683 | Symbol* error = SystemDictionary::find_resolution_error(this_oop, index); |
coleenp@4037 | 684 | guarantee(error != (Symbol*)NULL, "tag mismatch with resolution error table"); |
coleenp@4037 | 685 | ResourceMark rm; |
coleenp@4037 | 686 | THROW_MSG_0(error, ""); |
coleenp@4037 | 687 | break; |
coleenp@4037 | 688 | } |
coleenp@4037 | 689 | |
jrose@1957 | 690 | case JVM_CONSTANT_MethodHandle: |
jrose@1957 | 691 | { |
jrose@1957 | 692 | int ref_kind = this_oop->method_handle_ref_kind_at(index); |
jrose@1957 | 693 | int callee_index = this_oop->method_handle_klass_index_at(index); |
coleenp@2497 | 694 | Symbol* name = this_oop->method_handle_name_ref_at(index); |
coleenp@2497 | 695 | Symbol* signature = this_oop->method_handle_signature_ref_at(index); |
jrose@1957 | 696 | if (PrintMiscellaneous) |
jrose@1957 | 697 | tty->print_cr("resolve JVM_CONSTANT_MethodHandle:%d [%d/%d/%d] %s.%s", |
jrose@1957 | 698 | ref_kind, index, this_oop->method_handle_index_at(index), |
jrose@1957 | 699 | callee_index, name->as_C_string(), signature->as_C_string()); |
jrose@1957 | 700 | KlassHandle callee; |
coleenp@4037 | 701 | { Klass* k = klass_at_impl(this_oop, callee_index, CHECK_NULL); |
jrose@1957 | 702 | callee = KlassHandle(THREAD, k); |
jrose@1957 | 703 | } |
jrose@1957 | 704 | KlassHandle klass(THREAD, this_oop->pool_holder()); |
jrose@1957 | 705 | Handle value = SystemDictionary::link_method_handle_constant(klass, ref_kind, |
jrose@1957 | 706 | callee, name, signature, |
jrose@2268 | 707 | THREAD); |
coleenp@4037 | 708 | result_oop = value(); |
jrose@2268 | 709 | if (HAS_PENDING_EXCEPTION) { |
coleenp@4037 | 710 | save_and_throw_exception(this_oop, index, tag_value, CHECK_NULL); |
jrose@2268 | 711 | } |
jrose@1957 | 712 | break; |
jrose@1957 | 713 | } |
jrose@1957 | 714 | |
jrose@1957 | 715 | case JVM_CONSTANT_MethodType: |
jrose@1957 | 716 | { |
coleenp@2497 | 717 | Symbol* signature = this_oop->method_type_signature_at(index); |
jrose@1957 | 718 | if (PrintMiscellaneous) |
jrose@1957 | 719 | tty->print_cr("resolve JVM_CONSTANT_MethodType [%d/%d] %s", |
jrose@1957 | 720 | index, this_oop->method_type_index_at(index), |
jrose@1957 | 721 | signature->as_C_string()); |
jrose@1957 | 722 | KlassHandle klass(THREAD, this_oop->pool_holder()); |
twisti@3969 | 723 | Handle value = SystemDictionary::find_method_handle_type(signature, klass, THREAD); |
coleenp@4037 | 724 | result_oop = value(); |
jrose@2268 | 725 | if (HAS_PENDING_EXCEPTION) { |
coleenp@4037 | 726 | save_and_throw_exception(this_oop, index, tag_value, CHECK_NULL); |
jrose@2268 | 727 | } |
jrose@1957 | 728 | break; |
jrose@1957 | 729 | } |
jrose@1957 | 730 | |
jrose@1957 | 731 | case JVM_CONSTANT_Integer: |
coleenp@4037 | 732 | assert(cache_index == _no_index_sentinel, "should not have been set"); |
jrose@2268 | 733 | prim_value.i = this_oop->int_at(index); |
jrose@2268 | 734 | result_oop = java_lang_boxing_object::create(T_INT, &prim_value, CHECK_NULL); |
jrose@2268 | 735 | break; |
jrose@2268 | 736 | |
jrose@1957 | 737 | case JVM_CONSTANT_Float: |
coleenp@4037 | 738 | assert(cache_index == _no_index_sentinel, "should not have been set"); |
jrose@2268 | 739 | prim_value.f = this_oop->float_at(index); |
jrose@2268 | 740 | result_oop = java_lang_boxing_object::create(T_FLOAT, &prim_value, CHECK_NULL); |
jrose@2268 | 741 | break; |
jrose@2268 | 742 | |
jrose@1957 | 743 | case JVM_CONSTANT_Long: |
coleenp@4037 | 744 | assert(cache_index == _no_index_sentinel, "should not have been set"); |
jrose@2268 | 745 | prim_value.j = this_oop->long_at(index); |
jrose@2268 | 746 | result_oop = java_lang_boxing_object::create(T_LONG, &prim_value, CHECK_NULL); |
jrose@2268 | 747 | break; |
jrose@2268 | 748 | |
jrose@1957 | 749 | case JVM_CONSTANT_Double: |
coleenp@4037 | 750 | assert(cache_index == _no_index_sentinel, "should not have been set"); |
jrose@2268 | 751 | prim_value.d = this_oop->double_at(index); |
jrose@2268 | 752 | result_oop = java_lang_boxing_object::create(T_DOUBLE, &prim_value, CHECK_NULL); |
jrose@1957 | 753 | break; |
jrose@1957 | 754 | |
jrose@1957 | 755 | default: |
jrose@1957 | 756 | DEBUG_ONLY( tty->print_cr("*** %p: tag at CP[%d/%d] = %d", |
jrose@1957 | 757 | this_oop(), index, cache_index, tag_value) ); |
jrose@1957 | 758 | assert(false, "unexpected constant tag"); |
jrose@1957 | 759 | break; |
jrose@1957 | 760 | } |
jrose@1957 | 761 | |
jrose@1957 | 762 | if (cache_index >= 0) { |
jrose@1957 | 763 | // Cache the oop here also. |
jrose@2268 | 764 | Handle result_handle(THREAD, result_oop); |
iklam@4984 | 765 | oop cplock = this_oop->lock(); |
iklam@4984 | 766 | ObjectLocker ol(cplock, THREAD, cplock != NULL); // don't know if we really need this |
coleenp@4037 | 767 | oop result = this_oop->resolved_references()->obj_at(cache_index); |
coleenp@4037 | 768 | // Benign race condition: resolved_references may already be filled in while we were trying to lock. |
jrose@2268 | 769 | // The important thing here is that all threads pick up the same result. |
jrose@2268 | 770 | // It doesn't matter which racing thread wins, as long as only one |
jrose@2268 | 771 | // result is used by all threads, and all future queries. |
jrose@2268 | 772 | // That result may be either a resolved constant or a failure exception. |
coleenp@4037 | 773 | if (result == NULL) { |
coleenp@4037 | 774 | this_oop->resolved_references()->obj_at_put(cache_index, result_handle()); |
coleenp@4037 | 775 | return result_handle(); |
coleenp@4037 | 776 | } else { |
coleenp@4037 | 777 | // Return the winning thread's result. This can be different than |
coleenp@4037 | 778 | // result_handle() for MethodHandles. |
coleenp@4037 | 779 | return result; |
jrose@1957 | 780 | } |
jrose@1957 | 781 | } else { |
jrose@1957 | 782 | return result_oop; |
jrose@1957 | 783 | } |
jrose@1957 | 784 | } |
jrose@1957 | 785 | |
coleenp@4037 | 786 | oop ConstantPool::uncached_string_at(int which, TRAPS) { |
coleenp@4037 | 787 | Symbol* sym = unresolved_string_at(which); |
coleenp@4037 | 788 | oop str = StringTable::intern(sym, CHECK_(NULL)); |
coleenp@4037 | 789 | assert(java_lang_String::is_instance(str), "must be string"); |
coleenp@4037 | 790 | return str; |
coleenp@4037 | 791 | } |
twisti@3969 | 792 | |
coleenp@4037 | 793 | |
coleenp@4037 | 794 | oop ConstantPool::resolve_bootstrap_specifier_at_impl(constantPoolHandle this_oop, int index, TRAPS) { |
twisti@3969 | 795 | assert(this_oop->tag_at(index).is_invoke_dynamic(), "Corrupted constant pool"); |
twisti@3969 | 796 | |
twisti@3969 | 797 | Handle bsm; |
twisti@3969 | 798 | int argc; |
twisti@3969 | 799 | { |
twisti@3969 | 800 | // JVM_CONSTANT_InvokeDynamic is an ordered pair of [bootm, name&type], plus optional arguments |
twisti@3969 | 801 | // The bootm, being a JVM_CONSTANT_MethodHandle, has its own cache entry. |
twisti@3969 | 802 | // It is accompanied by the optional arguments. |
twisti@3969 | 803 | int bsm_index = this_oop->invoke_dynamic_bootstrap_method_ref_index_at(index); |
twisti@3969 | 804 | oop bsm_oop = this_oop->resolve_possibly_cached_constant_at(bsm_index, CHECK_NULL); |
twisti@3969 | 805 | if (!java_lang_invoke_MethodHandle::is_instance(bsm_oop)) { |
twisti@3969 | 806 | THROW_MSG_NULL(vmSymbols::java_lang_LinkageError(), "BSM not an MethodHandle"); |
twisti@3969 | 807 | } |
twisti@3969 | 808 | |
twisti@3969 | 809 | // Extract the optional static arguments. |
twisti@3969 | 810 | argc = this_oop->invoke_dynamic_argument_count_at(index); |
twisti@3969 | 811 | if (argc == 0) return bsm_oop; |
twisti@3969 | 812 | |
twisti@3969 | 813 | bsm = Handle(THREAD, bsm_oop); |
twisti@3969 | 814 | } |
twisti@3969 | 815 | |
twisti@3969 | 816 | objArrayHandle info; |
twisti@3969 | 817 | { |
twisti@3969 | 818 | objArrayOop info_oop = oopFactory::new_objArray(SystemDictionary::Object_klass(), 1+argc, CHECK_NULL); |
twisti@3969 | 819 | info = objArrayHandle(THREAD, info_oop); |
twisti@3969 | 820 | } |
twisti@3969 | 821 | |
twisti@3969 | 822 | info->obj_at_put(0, bsm()); |
twisti@3969 | 823 | for (int i = 0; i < argc; i++) { |
twisti@3969 | 824 | int arg_index = this_oop->invoke_dynamic_argument_index_at(index, i); |
twisti@3969 | 825 | oop arg_oop = this_oop->resolve_possibly_cached_constant_at(arg_index, CHECK_NULL); |
twisti@3969 | 826 | info->obj_at_put(1+i, arg_oop); |
twisti@3969 | 827 | } |
twisti@3969 | 828 | |
twisti@3969 | 829 | return info(); |
twisti@3969 | 830 | } |
twisti@3969 | 831 | |
coleenp@4037 | 832 | oop ConstantPool::string_at_impl(constantPoolHandle this_oop, int which, int obj_index, TRAPS) { |
coleenp@4037 | 833 | // If the string has already been interned, this entry will be non-null |
coleenp@4037 | 834 | oop str = this_oop->resolved_references()->obj_at(obj_index); |
coleenp@4037 | 835 | if (str != NULL) return str; |
coleenp@5753 | 836 | Symbol* sym = this_oop->unresolved_string_at(which); |
coleenp@4037 | 837 | str = StringTable::intern(sym, CHECK_(NULL)); |
coleenp@4037 | 838 | this_oop->string_at_put(which, obj_index, str); |
coleenp@2497 | 839 | assert(java_lang_String::is_instance(str), "must be string"); |
coleenp@2497 | 840 | return str; |
duke@435 | 841 | } |
duke@435 | 842 | |
duke@435 | 843 | |
coleenp@4037 | 844 | bool ConstantPool::klass_name_at_matches(instanceKlassHandle k, |
duke@435 | 845 | int which) { |
coleenp@2497 | 846 | // Names are interned, so we can compare Symbol*s directly |
coleenp@2497 | 847 | Symbol* cp_name = klass_name_at(which); |
duke@435 | 848 | return (cp_name == k->name()); |
duke@435 | 849 | } |
duke@435 | 850 | |
duke@435 | 851 | |
coleenp@2497 | 852 | // Iterate over symbols and decrement ones which are Symbol*s. |
coleenp@2497 | 853 | // This is done during GC so do not need to lock constantPool unless we |
coleenp@2497 | 854 | // have per-thread safepoints. |
coleenp@2497 | 855 | // Only decrement the UTF8 symbols. Unresolved classes and strings point to |
coleenp@2497 | 856 | // these symbols but didn't increment the reference count. |
coleenp@4037 | 857 | void ConstantPool::unreference_symbols() { |
coleenp@2497 | 858 | for (int index = 1; index < length(); index++) { // Index 0 is unused |
coleenp@2497 | 859 | constantTag tag = tag_at(index); |
coleenp@2497 | 860 | if (tag.is_symbol()) { |
coleenp@2497 | 861 | symbol_at(index)->decrement_refcount(); |
coleenp@2497 | 862 | } |
coleenp@2497 | 863 | } |
coleenp@2497 | 864 | } |
duke@435 | 865 | |
duke@435 | 866 | |
duke@435 | 867 | // Compare this constant pool's entry at index1 to the constant pool |
duke@435 | 868 | // cp2's entry at index2. |
coleenp@4037 | 869 | bool ConstantPool::compare_entry_to(int index1, constantPoolHandle cp2, |
duke@435 | 870 | int index2, TRAPS) { |
duke@435 | 871 | |
duke@435 | 872 | jbyte t1 = tag_at(index1).value(); |
duke@435 | 873 | jbyte t2 = cp2->tag_at(index2).value(); |
duke@435 | 874 | |
duke@435 | 875 | |
duke@435 | 876 | // JVM_CONSTANT_UnresolvedClassInError is equal to JVM_CONSTANT_UnresolvedClass |
duke@435 | 877 | // when comparing |
duke@435 | 878 | if (t1 == JVM_CONSTANT_UnresolvedClassInError) { |
duke@435 | 879 | t1 = JVM_CONSTANT_UnresolvedClass; |
duke@435 | 880 | } |
duke@435 | 881 | if (t2 == JVM_CONSTANT_UnresolvedClassInError) { |
duke@435 | 882 | t2 = JVM_CONSTANT_UnresolvedClass; |
duke@435 | 883 | } |
duke@435 | 884 | |
duke@435 | 885 | if (t1 != t2) { |
duke@435 | 886 | // Not the same entry type so there is nothing else to check. Note |
duke@435 | 887 | // that this style of checking will consider resolved/unresolved |
coleenp@4037 | 888 | // class pairs as different. |
coleenp@4037 | 889 | // From the ConstantPool* API point of view, this is correct |
coleenp@4037 | 890 | // behavior. See VM_RedefineClasses::merge_constant_pools() to see how this |
coleenp@4037 | 891 | // plays out in the context of ConstantPool* merging. |
duke@435 | 892 | return false; |
duke@435 | 893 | } |
duke@435 | 894 | |
duke@435 | 895 | switch (t1) { |
duke@435 | 896 | case JVM_CONSTANT_Class: |
duke@435 | 897 | { |
coleenp@4037 | 898 | Klass* k1 = klass_at(index1, CHECK_false); |
coleenp@4037 | 899 | Klass* k2 = cp2->klass_at(index2, CHECK_false); |
duke@435 | 900 | if (k1 == k2) { |
duke@435 | 901 | return true; |
duke@435 | 902 | } |
duke@435 | 903 | } break; |
duke@435 | 904 | |
duke@435 | 905 | case JVM_CONSTANT_ClassIndex: |
duke@435 | 906 | { |
duke@435 | 907 | int recur1 = klass_index_at(index1); |
duke@435 | 908 | int recur2 = cp2->klass_index_at(index2); |
duke@435 | 909 | bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); |
duke@435 | 910 | if (match) { |
duke@435 | 911 | return true; |
duke@435 | 912 | } |
duke@435 | 913 | } break; |
duke@435 | 914 | |
duke@435 | 915 | case JVM_CONSTANT_Double: |
duke@435 | 916 | { |
duke@435 | 917 | jdouble d1 = double_at(index1); |
duke@435 | 918 | jdouble d2 = cp2->double_at(index2); |
duke@435 | 919 | if (d1 == d2) { |
duke@435 | 920 | return true; |
duke@435 | 921 | } |
duke@435 | 922 | } break; |
duke@435 | 923 | |
duke@435 | 924 | case JVM_CONSTANT_Fieldref: |
duke@435 | 925 | case JVM_CONSTANT_InterfaceMethodref: |
duke@435 | 926 | case JVM_CONSTANT_Methodref: |
duke@435 | 927 | { |
duke@435 | 928 | int recur1 = uncached_klass_ref_index_at(index1); |
duke@435 | 929 | int recur2 = cp2->uncached_klass_ref_index_at(index2); |
duke@435 | 930 | bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); |
duke@435 | 931 | if (match) { |
duke@435 | 932 | recur1 = uncached_name_and_type_ref_index_at(index1); |
duke@435 | 933 | recur2 = cp2->uncached_name_and_type_ref_index_at(index2); |
duke@435 | 934 | match = compare_entry_to(recur1, cp2, recur2, CHECK_false); |
duke@435 | 935 | if (match) { |
duke@435 | 936 | return true; |
duke@435 | 937 | } |
duke@435 | 938 | } |
duke@435 | 939 | } break; |
duke@435 | 940 | |
duke@435 | 941 | case JVM_CONSTANT_Float: |
duke@435 | 942 | { |
duke@435 | 943 | jfloat f1 = float_at(index1); |
duke@435 | 944 | jfloat f2 = cp2->float_at(index2); |
duke@435 | 945 | if (f1 == f2) { |
duke@435 | 946 | return true; |
duke@435 | 947 | } |
duke@435 | 948 | } break; |
duke@435 | 949 | |
duke@435 | 950 | case JVM_CONSTANT_Integer: |
duke@435 | 951 | { |
duke@435 | 952 | jint i1 = int_at(index1); |
duke@435 | 953 | jint i2 = cp2->int_at(index2); |
duke@435 | 954 | if (i1 == i2) { |
duke@435 | 955 | return true; |
duke@435 | 956 | } |
duke@435 | 957 | } break; |
duke@435 | 958 | |
duke@435 | 959 | case JVM_CONSTANT_Long: |
duke@435 | 960 | { |
duke@435 | 961 | jlong l1 = long_at(index1); |
duke@435 | 962 | jlong l2 = cp2->long_at(index2); |
duke@435 | 963 | if (l1 == l2) { |
duke@435 | 964 | return true; |
duke@435 | 965 | } |
duke@435 | 966 | } break; |
duke@435 | 967 | |
duke@435 | 968 | case JVM_CONSTANT_NameAndType: |
duke@435 | 969 | { |
duke@435 | 970 | int recur1 = name_ref_index_at(index1); |
duke@435 | 971 | int recur2 = cp2->name_ref_index_at(index2); |
duke@435 | 972 | bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); |
duke@435 | 973 | if (match) { |
duke@435 | 974 | recur1 = signature_ref_index_at(index1); |
duke@435 | 975 | recur2 = cp2->signature_ref_index_at(index2); |
duke@435 | 976 | match = compare_entry_to(recur1, cp2, recur2, CHECK_false); |
duke@435 | 977 | if (match) { |
duke@435 | 978 | return true; |
duke@435 | 979 | } |
duke@435 | 980 | } |
duke@435 | 981 | } break; |
duke@435 | 982 | |
duke@435 | 983 | case JVM_CONSTANT_StringIndex: |
duke@435 | 984 | { |
duke@435 | 985 | int recur1 = string_index_at(index1); |
duke@435 | 986 | int recur2 = cp2->string_index_at(index2); |
duke@435 | 987 | bool match = compare_entry_to(recur1, cp2, recur2, CHECK_false); |
duke@435 | 988 | if (match) { |
duke@435 | 989 | return true; |
duke@435 | 990 | } |
duke@435 | 991 | } break; |
duke@435 | 992 | |
duke@435 | 993 | case JVM_CONSTANT_UnresolvedClass: |
duke@435 | 994 | { |
coleenp@2497 | 995 | Symbol* k1 = unresolved_klass_at(index1); |
coleenp@2497 | 996 | Symbol* k2 = cp2->unresolved_klass_at(index2); |
duke@435 | 997 | if (k1 == k2) { |
duke@435 | 998 | return true; |
duke@435 | 999 | } |
duke@435 | 1000 | } break; |
duke@435 | 1001 | |
jrose@1957 | 1002 | case JVM_CONSTANT_MethodType: |
jrose@1957 | 1003 | { |
jrose@1957 | 1004 | int k1 = method_type_index_at(index1); |
jrose@1957 | 1005 | int k2 = cp2->method_type_index_at(index2); |
jrose@2353 | 1006 | bool match = compare_entry_to(k1, cp2, k2, CHECK_false); |
jrose@2353 | 1007 | if (match) { |
jrose@1957 | 1008 | return true; |
jrose@1957 | 1009 | } |
jrose@1957 | 1010 | } break; |
jrose@1957 | 1011 | |
jrose@1957 | 1012 | case JVM_CONSTANT_MethodHandle: |
jrose@1957 | 1013 | { |
jrose@1957 | 1014 | int k1 = method_handle_ref_kind_at(index1); |
jrose@1957 | 1015 | int k2 = cp2->method_handle_ref_kind_at(index2); |
jrose@1957 | 1016 | if (k1 == k2) { |
jrose@1957 | 1017 | int i1 = method_handle_index_at(index1); |
jrose@1957 | 1018 | int i2 = cp2->method_handle_index_at(index2); |
jrose@2353 | 1019 | bool match = compare_entry_to(i1, cp2, i2, CHECK_false); |
jrose@2353 | 1020 | if (match) { |
jrose@1957 | 1021 | return true; |
jrose@1957 | 1022 | } |
jrose@1957 | 1023 | } |
jrose@1957 | 1024 | } break; |
jrose@1957 | 1025 | |
jrose@2015 | 1026 | case JVM_CONSTANT_InvokeDynamic: |
jrose@2015 | 1027 | { |
sspitsyn@4983 | 1028 | int k1 = invoke_dynamic_name_and_type_ref_index_at(index1); |
sspitsyn@4983 | 1029 | int k2 = cp2->invoke_dynamic_name_and_type_ref_index_at(index2); |
sspitsyn@4983 | 1030 | int i1 = invoke_dynamic_bootstrap_specifier_index(index1); |
sspitsyn@4983 | 1031 | int i2 = cp2->invoke_dynamic_bootstrap_specifier_index(index2); |
ccheung@5183 | 1032 | // separate statements and variables because CHECK_false is used |
ccheung@5183 | 1033 | bool match_entry = compare_entry_to(k1, cp2, k2, CHECK_false); |
ccheung@5183 | 1034 | bool match_operand = compare_operand_to(i1, cp2, i2, CHECK_false); |
ccheung@5183 | 1035 | return (match_entry && match_operand); |
jrose@2015 | 1036 | } break; |
jrose@2015 | 1037 | |
coleenp@4037 | 1038 | case JVM_CONSTANT_String: |
duke@435 | 1039 | { |
coleenp@2497 | 1040 | Symbol* s1 = unresolved_string_at(index1); |
coleenp@2497 | 1041 | Symbol* s2 = cp2->unresolved_string_at(index2); |
duke@435 | 1042 | if (s1 == s2) { |
duke@435 | 1043 | return true; |
duke@435 | 1044 | } |
duke@435 | 1045 | } break; |
duke@435 | 1046 | |
duke@435 | 1047 | case JVM_CONSTANT_Utf8: |
duke@435 | 1048 | { |
coleenp@2497 | 1049 | Symbol* s1 = symbol_at(index1); |
coleenp@2497 | 1050 | Symbol* s2 = cp2->symbol_at(index2); |
duke@435 | 1051 | if (s1 == s2) { |
duke@435 | 1052 | return true; |
duke@435 | 1053 | } |
duke@435 | 1054 | } break; |
duke@435 | 1055 | |
duke@435 | 1056 | // Invalid is used as the tag for the second constant pool entry |
duke@435 | 1057 | // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should |
duke@435 | 1058 | // not be seen by itself. |
duke@435 | 1059 | case JVM_CONSTANT_Invalid: // fall through |
duke@435 | 1060 | |
duke@435 | 1061 | default: |
duke@435 | 1062 | ShouldNotReachHere(); |
duke@435 | 1063 | break; |
duke@435 | 1064 | } |
duke@435 | 1065 | |
duke@435 | 1066 | return false; |
duke@435 | 1067 | } // end compare_entry_to() |
duke@435 | 1068 | |
duke@435 | 1069 | |
sspitsyn@4983 | 1070 | // Resize the operands array with delta_len and delta_size. |
sspitsyn@4983 | 1071 | // Used in RedefineClasses for CP merge. |
sspitsyn@4983 | 1072 | void ConstantPool::resize_operands(int delta_len, int delta_size, TRAPS) { |
sspitsyn@4983 | 1073 | int old_len = operand_array_length(operands()); |
sspitsyn@4983 | 1074 | int new_len = old_len + delta_len; |
sspitsyn@4983 | 1075 | int min_len = (delta_len > 0) ? old_len : new_len; |
sspitsyn@4983 | 1076 | |
sspitsyn@4983 | 1077 | int old_size = operands()->length(); |
sspitsyn@4983 | 1078 | int new_size = old_size + delta_size; |
sspitsyn@4983 | 1079 | int min_size = (delta_size > 0) ? old_size : new_size; |
sspitsyn@4983 | 1080 | |
sspitsyn@4983 | 1081 | ClassLoaderData* loader_data = pool_holder()->class_loader_data(); |
sspitsyn@4983 | 1082 | Array<u2>* new_ops = MetadataFactory::new_array<u2>(loader_data, new_size, CHECK); |
sspitsyn@4983 | 1083 | |
sspitsyn@4983 | 1084 | // Set index in the resized array for existing elements only |
sspitsyn@4983 | 1085 | for (int idx = 0; idx < min_len; idx++) { |
sspitsyn@4983 | 1086 | int offset = operand_offset_at(idx); // offset in original array |
sspitsyn@4983 | 1087 | operand_offset_at_put(new_ops, idx, offset + 2*delta_len); // offset in resized array |
sspitsyn@4983 | 1088 | } |
sspitsyn@4983 | 1089 | // Copy the bootstrap specifiers only |
sspitsyn@4983 | 1090 | Copy::conjoint_memory_atomic(operands()->adr_at(2*old_len), |
sspitsyn@4983 | 1091 | new_ops->adr_at(2*new_len), |
sspitsyn@4983 | 1092 | (min_size - 2*min_len) * sizeof(u2)); |
sspitsyn@4983 | 1093 | // Explicitly deallocate old operands array. |
sspitsyn@4983 | 1094 | // Note, it is not needed for 7u backport. |
sspitsyn@4983 | 1095 | if ( operands() != NULL) { // the safety check |
sspitsyn@4983 | 1096 | MetadataFactory::free_array<u2>(loader_data, operands()); |
sspitsyn@4983 | 1097 | } |
sspitsyn@4983 | 1098 | set_operands(new_ops); |
sspitsyn@4983 | 1099 | } // end resize_operands() |
sspitsyn@4983 | 1100 | |
sspitsyn@4983 | 1101 | |
sspitsyn@4983 | 1102 | // Extend the operands array with the length and size of the ext_cp operands. |
sspitsyn@4983 | 1103 | // Used in RedefineClasses for CP merge. |
sspitsyn@4983 | 1104 | void ConstantPool::extend_operands(constantPoolHandle ext_cp, TRAPS) { |
sspitsyn@4983 | 1105 | int delta_len = operand_array_length(ext_cp->operands()); |
sspitsyn@4983 | 1106 | if (delta_len == 0) { |
sspitsyn@4983 | 1107 | return; // nothing to do |
sspitsyn@4983 | 1108 | } |
sspitsyn@4983 | 1109 | int delta_size = ext_cp->operands()->length(); |
sspitsyn@4983 | 1110 | |
sspitsyn@4983 | 1111 | assert(delta_len > 0 && delta_size > 0, "extended operands array must be bigger"); |
sspitsyn@4983 | 1112 | |
sspitsyn@4983 | 1113 | if (operand_array_length(operands()) == 0) { |
sspitsyn@4983 | 1114 | ClassLoaderData* loader_data = pool_holder()->class_loader_data(); |
sspitsyn@4983 | 1115 | Array<u2>* new_ops = MetadataFactory::new_array<u2>(loader_data, delta_size, CHECK); |
sspitsyn@4983 | 1116 | // The first element index defines the offset of second part |
sspitsyn@4983 | 1117 | operand_offset_at_put(new_ops, 0, 2*delta_len); // offset in new array |
sspitsyn@4983 | 1118 | set_operands(new_ops); |
sspitsyn@4983 | 1119 | } else { |
sspitsyn@4983 | 1120 | resize_operands(delta_len, delta_size, CHECK); |
sspitsyn@4983 | 1121 | } |
sspitsyn@4983 | 1122 | |
sspitsyn@4983 | 1123 | } // end extend_operands() |
sspitsyn@4983 | 1124 | |
sspitsyn@4983 | 1125 | |
sspitsyn@4983 | 1126 | // Shrink the operands array to a smaller array with new_len length. |
sspitsyn@4983 | 1127 | // Used in RedefineClasses for CP merge. |
sspitsyn@4983 | 1128 | void ConstantPool::shrink_operands(int new_len, TRAPS) { |
sspitsyn@4983 | 1129 | int old_len = operand_array_length(operands()); |
sspitsyn@4983 | 1130 | if (new_len == old_len) { |
sspitsyn@4983 | 1131 | return; // nothing to do |
sspitsyn@4983 | 1132 | } |
sspitsyn@4983 | 1133 | assert(new_len < old_len, "shrunken operands array must be smaller"); |
sspitsyn@4983 | 1134 | |
sspitsyn@4983 | 1135 | int free_base = operand_next_offset_at(new_len - 1); |
sspitsyn@4983 | 1136 | int delta_len = new_len - old_len; |
sspitsyn@4983 | 1137 | int delta_size = 2*delta_len + free_base - operands()->length(); |
sspitsyn@4983 | 1138 | |
sspitsyn@4983 | 1139 | resize_operands(delta_len, delta_size, CHECK); |
sspitsyn@4983 | 1140 | |
sspitsyn@4983 | 1141 | } // end shrink_operands() |
sspitsyn@4983 | 1142 | |
sspitsyn@4983 | 1143 | |
sspitsyn@4493 | 1144 | void ConstantPool::copy_operands(constantPoolHandle from_cp, |
sspitsyn@4493 | 1145 | constantPoolHandle to_cp, |
sspitsyn@4493 | 1146 | TRAPS) { |
jrose@2353 | 1147 | |
jrose@2353 | 1148 | int from_oplen = operand_array_length(from_cp->operands()); |
jrose@2353 | 1149 | int old_oplen = operand_array_length(to_cp->operands()); |
jrose@2353 | 1150 | if (from_oplen != 0) { |
kamg@4245 | 1151 | ClassLoaderData* loader_data = to_cp->pool_holder()->class_loader_data(); |
jrose@2353 | 1152 | // append my operands to the target's operands array |
jrose@2353 | 1153 | if (old_oplen == 0) { |
kamg@4245 | 1154 | // Can't just reuse from_cp's operand list because of deallocation issues |
kamg@4245 | 1155 | int len = from_cp->operands()->length(); |
kamg@4245 | 1156 | Array<u2>* new_ops = MetadataFactory::new_array<u2>(loader_data, len, CHECK); |
kamg@4245 | 1157 | Copy::conjoint_memory_atomic( |
kamg@4245 | 1158 | from_cp->operands()->adr_at(0), new_ops->adr_at(0), len * sizeof(u2)); |
kamg@4245 | 1159 | to_cp->set_operands(new_ops); |
jrose@2353 | 1160 | } else { |
jrose@2353 | 1161 | int old_len = to_cp->operands()->length(); |
jrose@2353 | 1162 | int from_len = from_cp->operands()->length(); |
jrose@2353 | 1163 | int old_off = old_oplen * sizeof(u2); |
jrose@2353 | 1164 | int from_off = from_oplen * sizeof(u2); |
coleenp@4037 | 1165 | // Use the metaspace for the destination constant pool |
coleenp@4037 | 1166 | Array<u2>* new_operands = MetadataFactory::new_array<u2>(loader_data, old_len + from_len, CHECK); |
jrose@2353 | 1167 | int fillp = 0, len = 0; |
jrose@2353 | 1168 | // first part of dest |
coleenp@4037 | 1169 | Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(0), |
coleenp@4037 | 1170 | new_operands->adr_at(fillp), |
jrose@2353 | 1171 | (len = old_off) * sizeof(u2)); |
jrose@2353 | 1172 | fillp += len; |
jrose@2353 | 1173 | // first part of src |
sspitsyn@4505 | 1174 | Copy::conjoint_memory_atomic(from_cp->operands()->adr_at(0), |
coleenp@4037 | 1175 | new_operands->adr_at(fillp), |
jrose@2353 | 1176 | (len = from_off) * sizeof(u2)); |
jrose@2353 | 1177 | fillp += len; |
jrose@2353 | 1178 | // second part of dest |
coleenp@4037 | 1179 | Copy::conjoint_memory_atomic(to_cp->operands()->adr_at(old_off), |
coleenp@4037 | 1180 | new_operands->adr_at(fillp), |
jrose@2353 | 1181 | (len = old_len - old_off) * sizeof(u2)); |
jrose@2353 | 1182 | fillp += len; |
jrose@2353 | 1183 | // second part of src |
sspitsyn@4505 | 1184 | Copy::conjoint_memory_atomic(from_cp->operands()->adr_at(from_off), |
coleenp@4037 | 1185 | new_operands->adr_at(fillp), |
jrose@2353 | 1186 | (len = from_len - from_off) * sizeof(u2)); |
jrose@2353 | 1187 | fillp += len; |
jrose@2353 | 1188 | assert(fillp == new_operands->length(), ""); |
jrose@2353 | 1189 | |
jrose@2353 | 1190 | // Adjust indexes in the first part of the copied operands array. |
jrose@2353 | 1191 | for (int j = 0; j < from_oplen; j++) { |
coleenp@4037 | 1192 | int offset = operand_offset_at(new_operands, old_oplen + j); |
jrose@2353 | 1193 | assert(offset == operand_offset_at(from_cp->operands(), j), "correct copy"); |
jrose@2353 | 1194 | offset += old_len; // every new tuple is preceded by old_len extra u2's |
coleenp@4037 | 1195 | operand_offset_at_put(new_operands, old_oplen + j, offset); |
jrose@2353 | 1196 | } |
jrose@2353 | 1197 | |
jrose@2353 | 1198 | // replace target operands array with combined array |
coleenp@4037 | 1199 | to_cp->set_operands(new_operands); |
jrose@2353 | 1200 | } |
jrose@2353 | 1201 | } |
sspitsyn@4493 | 1202 | } // end copy_operands() |
jrose@2353 | 1203 | |
sspitsyn@4493 | 1204 | |
sspitsyn@4493 | 1205 | // Copy this constant pool's entries at start_i to end_i (inclusive) |
sspitsyn@4493 | 1206 | // to the constant pool to_cp's entries starting at to_i. A total of |
sspitsyn@4493 | 1207 | // (end_i - start_i) + 1 entries are copied. |
sspitsyn@4493 | 1208 | void ConstantPool::copy_cp_to_impl(constantPoolHandle from_cp, int start_i, int end_i, |
sspitsyn@4493 | 1209 | constantPoolHandle to_cp, int to_i, TRAPS) { |
sspitsyn@4493 | 1210 | |
sspitsyn@4493 | 1211 | |
sspitsyn@4493 | 1212 | int dest_i = to_i; // leave original alone for debug purposes |
sspitsyn@4493 | 1213 | |
sspitsyn@4493 | 1214 | for (int src_i = start_i; src_i <= end_i; /* see loop bottom */ ) { |
sspitsyn@4493 | 1215 | copy_entry_to(from_cp, src_i, to_cp, dest_i, CHECK); |
sspitsyn@4493 | 1216 | |
sspitsyn@4493 | 1217 | switch (from_cp->tag_at(src_i).value()) { |
sspitsyn@4493 | 1218 | case JVM_CONSTANT_Double: |
sspitsyn@4493 | 1219 | case JVM_CONSTANT_Long: |
sspitsyn@4493 | 1220 | // double and long take two constant pool entries |
sspitsyn@4493 | 1221 | src_i += 2; |
sspitsyn@4493 | 1222 | dest_i += 2; |
sspitsyn@4493 | 1223 | break; |
sspitsyn@4493 | 1224 | |
sspitsyn@4493 | 1225 | default: |
sspitsyn@4493 | 1226 | // all others take one constant pool entry |
sspitsyn@4493 | 1227 | src_i++; |
sspitsyn@4493 | 1228 | dest_i++; |
sspitsyn@4493 | 1229 | break; |
sspitsyn@4493 | 1230 | } |
sspitsyn@4493 | 1231 | } |
sspitsyn@4493 | 1232 | copy_operands(from_cp, to_cp, CHECK); |
sspitsyn@4493 | 1233 | |
sspitsyn@4493 | 1234 | } // end copy_cp_to_impl() |
duke@435 | 1235 | |
duke@435 | 1236 | |
duke@435 | 1237 | // Copy this constant pool's entry at from_i to the constant pool |
duke@435 | 1238 | // to_cp's entry at to_i. |
coleenp@4037 | 1239 | void ConstantPool::copy_entry_to(constantPoolHandle from_cp, int from_i, |
jrose@2353 | 1240 | constantPoolHandle to_cp, int to_i, |
jrose@2353 | 1241 | TRAPS) { |
duke@435 | 1242 | |
jrose@2353 | 1243 | int tag = from_cp->tag_at(from_i).value(); |
jrose@2353 | 1244 | switch (tag) { |
duke@435 | 1245 | case JVM_CONSTANT_Class: |
duke@435 | 1246 | { |
coleenp@4037 | 1247 | Klass* k = from_cp->klass_at(from_i, CHECK); |
duke@435 | 1248 | to_cp->klass_at_put(to_i, k); |
duke@435 | 1249 | } break; |
duke@435 | 1250 | |
duke@435 | 1251 | case JVM_CONSTANT_ClassIndex: |
duke@435 | 1252 | { |
jrose@2353 | 1253 | jint ki = from_cp->klass_index_at(from_i); |
duke@435 | 1254 | to_cp->klass_index_at_put(to_i, ki); |
duke@435 | 1255 | } break; |
duke@435 | 1256 | |
duke@435 | 1257 | case JVM_CONSTANT_Double: |
duke@435 | 1258 | { |
jrose@2353 | 1259 | jdouble d = from_cp->double_at(from_i); |
duke@435 | 1260 | to_cp->double_at_put(to_i, d); |
duke@435 | 1261 | // double takes two constant pool entries so init second entry's tag |
duke@435 | 1262 | to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); |
duke@435 | 1263 | } break; |
duke@435 | 1264 | |
duke@435 | 1265 | case JVM_CONSTANT_Fieldref: |
duke@435 | 1266 | { |
jrose@2353 | 1267 | int class_index = from_cp->uncached_klass_ref_index_at(from_i); |
jrose@2353 | 1268 | int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i); |
duke@435 | 1269 | to_cp->field_at_put(to_i, class_index, name_and_type_index); |
duke@435 | 1270 | } break; |
duke@435 | 1271 | |
duke@435 | 1272 | case JVM_CONSTANT_Float: |
duke@435 | 1273 | { |
jrose@2353 | 1274 | jfloat f = from_cp->float_at(from_i); |
duke@435 | 1275 | to_cp->float_at_put(to_i, f); |
duke@435 | 1276 | } break; |
duke@435 | 1277 | |
duke@435 | 1278 | case JVM_CONSTANT_Integer: |
duke@435 | 1279 | { |
jrose@2353 | 1280 | jint i = from_cp->int_at(from_i); |
duke@435 | 1281 | to_cp->int_at_put(to_i, i); |
duke@435 | 1282 | } break; |
duke@435 | 1283 | |
duke@435 | 1284 | case JVM_CONSTANT_InterfaceMethodref: |
duke@435 | 1285 | { |
jrose@2353 | 1286 | int class_index = from_cp->uncached_klass_ref_index_at(from_i); |
jrose@2353 | 1287 | int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i); |
duke@435 | 1288 | to_cp->interface_method_at_put(to_i, class_index, name_and_type_index); |
duke@435 | 1289 | } break; |
duke@435 | 1290 | |
duke@435 | 1291 | case JVM_CONSTANT_Long: |
duke@435 | 1292 | { |
jrose@2353 | 1293 | jlong l = from_cp->long_at(from_i); |
duke@435 | 1294 | to_cp->long_at_put(to_i, l); |
duke@435 | 1295 | // long takes two constant pool entries so init second entry's tag |
duke@435 | 1296 | to_cp->tag_at_put(to_i + 1, JVM_CONSTANT_Invalid); |
duke@435 | 1297 | } break; |
duke@435 | 1298 | |
duke@435 | 1299 | case JVM_CONSTANT_Methodref: |
duke@435 | 1300 | { |
jrose@2353 | 1301 | int class_index = from_cp->uncached_klass_ref_index_at(from_i); |
jrose@2353 | 1302 | int name_and_type_index = from_cp->uncached_name_and_type_ref_index_at(from_i); |
duke@435 | 1303 | to_cp->method_at_put(to_i, class_index, name_and_type_index); |
duke@435 | 1304 | } break; |
duke@435 | 1305 | |
duke@435 | 1306 | case JVM_CONSTANT_NameAndType: |
duke@435 | 1307 | { |
jrose@2353 | 1308 | int name_ref_index = from_cp->name_ref_index_at(from_i); |
jrose@2353 | 1309 | int signature_ref_index = from_cp->signature_ref_index_at(from_i); |
duke@435 | 1310 | to_cp->name_and_type_at_put(to_i, name_ref_index, signature_ref_index); |
duke@435 | 1311 | } break; |
duke@435 | 1312 | |
duke@435 | 1313 | case JVM_CONSTANT_StringIndex: |
duke@435 | 1314 | { |
jrose@2353 | 1315 | jint si = from_cp->string_index_at(from_i); |
duke@435 | 1316 | to_cp->string_index_at_put(to_i, si); |
duke@435 | 1317 | } break; |
duke@435 | 1318 | |
duke@435 | 1319 | case JVM_CONSTANT_UnresolvedClass: |
duke@435 | 1320 | { |
coleenp@2614 | 1321 | // Can be resolved after checking tag, so check the slot first. |
coleenp@2614 | 1322 | CPSlot entry = from_cp->slot_at(from_i); |
coleenp@4037 | 1323 | if (entry.is_resolved()) { |
coleenp@4037 | 1324 | assert(entry.get_klass()->is_klass(), "must be"); |
coleenp@2614 | 1325 | // Already resolved |
coleenp@4037 | 1326 | to_cp->klass_at_put(to_i, entry.get_klass()); |
coleenp@2614 | 1327 | } else { |
coleenp@2614 | 1328 | to_cp->unresolved_klass_at_put(to_i, entry.get_symbol()); |
coleenp@2614 | 1329 | } |
duke@435 | 1330 | } break; |
duke@435 | 1331 | |
duke@435 | 1332 | case JVM_CONSTANT_UnresolvedClassInError: |
duke@435 | 1333 | { |
coleenp@2497 | 1334 | Symbol* k = from_cp->unresolved_klass_at(from_i); |
duke@435 | 1335 | to_cp->unresolved_klass_at_put(to_i, k); |
duke@435 | 1336 | to_cp->tag_at_put(to_i, JVM_CONSTANT_UnresolvedClassInError); |
duke@435 | 1337 | } break; |
duke@435 | 1338 | |
duke@435 | 1339 | |
coleenp@4037 | 1340 | case JVM_CONSTANT_String: |
duke@435 | 1341 | { |
coleenp@4037 | 1342 | Symbol* s = from_cp->unresolved_string_at(from_i); |
coleenp@4037 | 1343 | to_cp->unresolved_string_at_put(to_i, s); |
duke@435 | 1344 | } break; |
duke@435 | 1345 | |
duke@435 | 1346 | case JVM_CONSTANT_Utf8: |
duke@435 | 1347 | { |
coleenp@2497 | 1348 | Symbol* s = from_cp->symbol_at(from_i); |
coleenp@4037 | 1349 | // Need to increase refcount, the old one will be thrown away and deferenced |
coleenp@4037 | 1350 | s->increment_refcount(); |
duke@435 | 1351 | to_cp->symbol_at_put(to_i, s); |
duke@435 | 1352 | } break; |
duke@435 | 1353 | |
jrose@1957 | 1354 | case JVM_CONSTANT_MethodType: |
jrose@1957 | 1355 | { |
jrose@2353 | 1356 | jint k = from_cp->method_type_index_at(from_i); |
jrose@1957 | 1357 | to_cp->method_type_index_at_put(to_i, k); |
jrose@1957 | 1358 | } break; |
jrose@1957 | 1359 | |
jrose@1957 | 1360 | case JVM_CONSTANT_MethodHandle: |
jrose@1957 | 1361 | { |
jrose@2353 | 1362 | int k1 = from_cp->method_handle_ref_kind_at(from_i); |
jrose@2353 | 1363 | int k2 = from_cp->method_handle_index_at(from_i); |
jrose@1957 | 1364 | to_cp->method_handle_index_at_put(to_i, k1, k2); |
jrose@1957 | 1365 | } break; |
jrose@1957 | 1366 | |
jrose@2015 | 1367 | case JVM_CONSTANT_InvokeDynamic: |
jrose@2015 | 1368 | { |
jrose@2353 | 1369 | int k1 = from_cp->invoke_dynamic_bootstrap_specifier_index(from_i); |
jrose@2353 | 1370 | int k2 = from_cp->invoke_dynamic_name_and_type_ref_index_at(from_i); |
jrose@2353 | 1371 | k1 += operand_array_length(to_cp->operands()); // to_cp might already have operands |
jrose@2353 | 1372 | to_cp->invoke_dynamic_at_put(to_i, k1, k2); |
jrose@2015 | 1373 | } break; |
jrose@2015 | 1374 | |
duke@435 | 1375 | // Invalid is used as the tag for the second constant pool entry |
duke@435 | 1376 | // occupied by JVM_CONSTANT_Double or JVM_CONSTANT_Long. It should |
duke@435 | 1377 | // not be seen by itself. |
duke@435 | 1378 | case JVM_CONSTANT_Invalid: // fall through |
duke@435 | 1379 | |
duke@435 | 1380 | default: |
duke@435 | 1381 | { |
duke@435 | 1382 | ShouldNotReachHere(); |
duke@435 | 1383 | } break; |
duke@435 | 1384 | } |
duke@435 | 1385 | } // end copy_entry_to() |
duke@435 | 1386 | |
duke@435 | 1387 | |
duke@435 | 1388 | // Search constant pool search_cp for an entry that matches this |
duke@435 | 1389 | // constant pool's entry at pattern_i. Returns the index of a |
duke@435 | 1390 | // matching entry or zero (0) if there is no matching entry. |
coleenp@4037 | 1391 | int ConstantPool::find_matching_entry(int pattern_i, |
duke@435 | 1392 | constantPoolHandle search_cp, TRAPS) { |
duke@435 | 1393 | |
duke@435 | 1394 | // index zero (0) is not used |
duke@435 | 1395 | for (int i = 1; i < search_cp->length(); i++) { |
duke@435 | 1396 | bool found = compare_entry_to(pattern_i, search_cp, i, CHECK_0); |
duke@435 | 1397 | if (found) { |
duke@435 | 1398 | return i; |
duke@435 | 1399 | } |
duke@435 | 1400 | } |
duke@435 | 1401 | |
duke@435 | 1402 | return 0; // entry not found; return unused index zero (0) |
duke@435 | 1403 | } // end find_matching_entry() |
duke@435 | 1404 | |
duke@435 | 1405 | |
sspitsyn@4983 | 1406 | // Compare this constant pool's bootstrap specifier at idx1 to the constant pool |
sspitsyn@4983 | 1407 | // cp2's bootstrap specifier at idx2. |
sspitsyn@4983 | 1408 | bool ConstantPool::compare_operand_to(int idx1, constantPoolHandle cp2, int idx2, TRAPS) { |
sspitsyn@4983 | 1409 | int k1 = operand_bootstrap_method_ref_index_at(idx1); |
sspitsyn@4983 | 1410 | int k2 = cp2->operand_bootstrap_method_ref_index_at(idx2); |
sspitsyn@4983 | 1411 | bool match = compare_entry_to(k1, cp2, k2, CHECK_false); |
sspitsyn@4983 | 1412 | |
sspitsyn@4983 | 1413 | if (!match) { |
sspitsyn@4983 | 1414 | return false; |
sspitsyn@4983 | 1415 | } |
sspitsyn@4983 | 1416 | int argc = operand_argument_count_at(idx1); |
sspitsyn@4983 | 1417 | if (argc == cp2->operand_argument_count_at(idx2)) { |
sspitsyn@4983 | 1418 | for (int j = 0; j < argc; j++) { |
sspitsyn@4983 | 1419 | k1 = operand_argument_index_at(idx1, j); |
sspitsyn@4983 | 1420 | k2 = cp2->operand_argument_index_at(idx2, j); |
sspitsyn@4983 | 1421 | match = compare_entry_to(k1, cp2, k2, CHECK_false); |
sspitsyn@4983 | 1422 | if (!match) { |
sspitsyn@4983 | 1423 | return false; |
sspitsyn@4983 | 1424 | } |
sspitsyn@4983 | 1425 | } |
sspitsyn@4983 | 1426 | return true; // got through loop; all elements equal |
sspitsyn@4983 | 1427 | } |
sspitsyn@4983 | 1428 | return false; |
sspitsyn@4983 | 1429 | } // end compare_operand_to() |
sspitsyn@4983 | 1430 | |
sspitsyn@4983 | 1431 | // Search constant pool search_cp for a bootstrap specifier that matches |
sspitsyn@4983 | 1432 | // this constant pool's bootstrap specifier at pattern_i index. |
sspitsyn@4983 | 1433 | // Return the index of a matching bootstrap specifier or (-1) if there is no match. |
sspitsyn@4983 | 1434 | int ConstantPool::find_matching_operand(int pattern_i, |
sspitsyn@4983 | 1435 | constantPoolHandle search_cp, int search_len, TRAPS) { |
sspitsyn@4983 | 1436 | for (int i = 0; i < search_len; i++) { |
sspitsyn@4983 | 1437 | bool found = compare_operand_to(pattern_i, search_cp, i, CHECK_(-1)); |
sspitsyn@4983 | 1438 | if (found) { |
sspitsyn@4983 | 1439 | return i; |
sspitsyn@4983 | 1440 | } |
sspitsyn@4983 | 1441 | } |
sspitsyn@4983 | 1442 | return -1; // bootstrap specifier not found; return unused index (-1) |
sspitsyn@4983 | 1443 | } // end find_matching_operand() |
sspitsyn@4983 | 1444 | |
sspitsyn@4983 | 1445 | |
duke@435 | 1446 | #ifndef PRODUCT |
duke@435 | 1447 | |
coleenp@4037 | 1448 | const char* ConstantPool::printable_name_at(int which) { |
duke@435 | 1449 | |
duke@435 | 1450 | constantTag tag = tag_at(which); |
duke@435 | 1451 | |
coleenp@4037 | 1452 | if (tag.is_string()) { |
duke@435 | 1453 | return string_at_noresolve(which); |
duke@435 | 1454 | } else if (tag.is_klass() || tag.is_unresolved_klass()) { |
duke@435 | 1455 | return klass_name_at(which)->as_C_string(); |
duke@435 | 1456 | } else if (tag.is_symbol()) { |
duke@435 | 1457 | return symbol_at(which)->as_C_string(); |
duke@435 | 1458 | } |
duke@435 | 1459 | return ""; |
duke@435 | 1460 | } |
duke@435 | 1461 | |
duke@435 | 1462 | #endif // PRODUCT |
duke@435 | 1463 | |
duke@435 | 1464 | |
duke@435 | 1465 | // JVMTI GetConstantPool support |
duke@435 | 1466 | |
mikael@4889 | 1467 | // For debugging of constant pool |
mikael@4889 | 1468 | const bool debug_cpool = false; |
duke@435 | 1469 | |
mikael@4889 | 1470 | #define DBG(code) do { if (debug_cpool) { (code); } } while(0) |
duke@435 | 1471 | |
duke@435 | 1472 | static void print_cpool_bytes(jint cnt, u1 *bytes) { |
mikael@4889 | 1473 | const char* WARN_MSG = "Must not be such entry!"; |
duke@435 | 1474 | jint size = 0; |
duke@435 | 1475 | u2 idx1, idx2; |
duke@435 | 1476 | |
duke@435 | 1477 | for (jint idx = 1; idx < cnt; idx++) { |
duke@435 | 1478 | jint ent_size = 0; |
duke@435 | 1479 | u1 tag = *bytes++; |
duke@435 | 1480 | size++; // count tag |
duke@435 | 1481 | |
duke@435 | 1482 | printf("const #%03d, tag: %02d ", idx, tag); |
duke@435 | 1483 | switch(tag) { |
duke@435 | 1484 | case JVM_CONSTANT_Invalid: { |
duke@435 | 1485 | printf("Invalid"); |
duke@435 | 1486 | break; |
duke@435 | 1487 | } |
duke@435 | 1488 | case JVM_CONSTANT_Unicode: { |
duke@435 | 1489 | printf("Unicode %s", WARN_MSG); |
duke@435 | 1490 | break; |
duke@435 | 1491 | } |
duke@435 | 1492 | case JVM_CONSTANT_Utf8: { |
duke@435 | 1493 | u2 len = Bytes::get_Java_u2(bytes); |
duke@435 | 1494 | char str[128]; |
duke@435 | 1495 | if (len > 127) { |
duke@435 | 1496 | len = 127; |
duke@435 | 1497 | } |
duke@435 | 1498 | strncpy(str, (char *) (bytes+2), len); |
duke@435 | 1499 | str[len] = '\0'; |
duke@435 | 1500 | printf("Utf8 \"%s\"", str); |
duke@435 | 1501 | ent_size = 2 + len; |
duke@435 | 1502 | break; |
duke@435 | 1503 | } |
duke@435 | 1504 | case JVM_CONSTANT_Integer: { |
duke@435 | 1505 | u4 val = Bytes::get_Java_u4(bytes); |
duke@435 | 1506 | printf("int %d", *(int *) &val); |
duke@435 | 1507 | ent_size = 4; |
duke@435 | 1508 | break; |
duke@435 | 1509 | } |
duke@435 | 1510 | case JVM_CONSTANT_Float: { |
duke@435 | 1511 | u4 val = Bytes::get_Java_u4(bytes); |
duke@435 | 1512 | printf("float %5.3ff", *(float *) &val); |
duke@435 | 1513 | ent_size = 4; |
duke@435 | 1514 | break; |
duke@435 | 1515 | } |
duke@435 | 1516 | case JVM_CONSTANT_Long: { |
duke@435 | 1517 | u8 val = Bytes::get_Java_u8(bytes); |
never@3156 | 1518 | printf("long "INT64_FORMAT, (int64_t) *(jlong *) &val); |
duke@435 | 1519 | ent_size = 8; |
duke@435 | 1520 | idx++; // Long takes two cpool slots |
duke@435 | 1521 | break; |
duke@435 | 1522 | } |
duke@435 | 1523 | case JVM_CONSTANT_Double: { |
duke@435 | 1524 | u8 val = Bytes::get_Java_u8(bytes); |
duke@435 | 1525 | printf("double %5.3fd", *(jdouble *)&val); |
duke@435 | 1526 | ent_size = 8; |
duke@435 | 1527 | idx++; // Double takes two cpool slots |
duke@435 | 1528 | break; |
duke@435 | 1529 | } |
duke@435 | 1530 | case JVM_CONSTANT_Class: { |
duke@435 | 1531 | idx1 = Bytes::get_Java_u2(bytes); |
duke@435 | 1532 | printf("class #%03d", idx1); |
duke@435 | 1533 | ent_size = 2; |
duke@435 | 1534 | break; |
duke@435 | 1535 | } |
duke@435 | 1536 | case JVM_CONSTANT_String: { |
duke@435 | 1537 | idx1 = Bytes::get_Java_u2(bytes); |
duke@435 | 1538 | printf("String #%03d", idx1); |
duke@435 | 1539 | ent_size = 2; |
duke@435 | 1540 | break; |
duke@435 | 1541 | } |
duke@435 | 1542 | case JVM_CONSTANT_Fieldref: { |
duke@435 | 1543 | idx1 = Bytes::get_Java_u2(bytes); |
duke@435 | 1544 | idx2 = Bytes::get_Java_u2(bytes+2); |
duke@435 | 1545 | printf("Field #%03d, #%03d", (int) idx1, (int) idx2); |
duke@435 | 1546 | ent_size = 4; |
duke@435 | 1547 | break; |
duke@435 | 1548 | } |
duke@435 | 1549 | case JVM_CONSTANT_Methodref: { |
duke@435 | 1550 | idx1 = Bytes::get_Java_u2(bytes); |
duke@435 | 1551 | idx2 = Bytes::get_Java_u2(bytes+2); |
duke@435 | 1552 | printf("Method #%03d, #%03d", idx1, idx2); |
duke@435 | 1553 | ent_size = 4; |
duke@435 | 1554 | break; |
duke@435 | 1555 | } |
duke@435 | 1556 | case JVM_CONSTANT_InterfaceMethodref: { |
duke@435 | 1557 | idx1 = Bytes::get_Java_u2(bytes); |
duke@435 | 1558 | idx2 = Bytes::get_Java_u2(bytes+2); |
duke@435 | 1559 | printf("InterfMethod #%03d, #%03d", idx1, idx2); |
duke@435 | 1560 | ent_size = 4; |
duke@435 | 1561 | break; |
duke@435 | 1562 | } |
duke@435 | 1563 | case JVM_CONSTANT_NameAndType: { |
duke@435 | 1564 | idx1 = Bytes::get_Java_u2(bytes); |
duke@435 | 1565 | idx2 = Bytes::get_Java_u2(bytes+2); |
duke@435 | 1566 | printf("NameAndType #%03d, #%03d", idx1, idx2); |
duke@435 | 1567 | ent_size = 4; |
duke@435 | 1568 | break; |
duke@435 | 1569 | } |
duke@435 | 1570 | case JVM_CONSTANT_ClassIndex: { |
duke@435 | 1571 | printf("ClassIndex %s", WARN_MSG); |
duke@435 | 1572 | break; |
duke@435 | 1573 | } |
duke@435 | 1574 | case JVM_CONSTANT_UnresolvedClass: { |
duke@435 | 1575 | printf("UnresolvedClass: %s", WARN_MSG); |
duke@435 | 1576 | break; |
duke@435 | 1577 | } |
duke@435 | 1578 | case JVM_CONSTANT_UnresolvedClassInError: { |
duke@435 | 1579 | printf("UnresolvedClassInErr: %s", WARN_MSG); |
duke@435 | 1580 | break; |
duke@435 | 1581 | } |
duke@435 | 1582 | case JVM_CONSTANT_StringIndex: { |
duke@435 | 1583 | printf("StringIndex: %s", WARN_MSG); |
duke@435 | 1584 | break; |
duke@435 | 1585 | } |
duke@435 | 1586 | } |
duke@435 | 1587 | printf(";\n"); |
duke@435 | 1588 | bytes += ent_size; |
duke@435 | 1589 | size += ent_size; |
duke@435 | 1590 | } |
duke@435 | 1591 | printf("Cpool size: %d\n", size); |
duke@435 | 1592 | fflush(0); |
duke@435 | 1593 | return; |
duke@435 | 1594 | } /* end print_cpool_bytes */ |
duke@435 | 1595 | |
duke@435 | 1596 | |
duke@435 | 1597 | // Returns size of constant pool entry. |
coleenp@4037 | 1598 | jint ConstantPool::cpool_entry_size(jint idx) { |
duke@435 | 1599 | switch(tag_at(idx).value()) { |
duke@435 | 1600 | case JVM_CONSTANT_Invalid: |
duke@435 | 1601 | case JVM_CONSTANT_Unicode: |
duke@435 | 1602 | return 1; |
duke@435 | 1603 | |
duke@435 | 1604 | case JVM_CONSTANT_Utf8: |
duke@435 | 1605 | return 3 + symbol_at(idx)->utf8_length(); |
duke@435 | 1606 | |
duke@435 | 1607 | case JVM_CONSTANT_Class: |
duke@435 | 1608 | case JVM_CONSTANT_String: |
duke@435 | 1609 | case JVM_CONSTANT_ClassIndex: |
duke@435 | 1610 | case JVM_CONSTANT_UnresolvedClass: |
duke@435 | 1611 | case JVM_CONSTANT_UnresolvedClassInError: |
duke@435 | 1612 | case JVM_CONSTANT_StringIndex: |
jrose@1957 | 1613 | case JVM_CONSTANT_MethodType: |
iklam@5760 | 1614 | case JVM_CONSTANT_MethodTypeInError: |
duke@435 | 1615 | return 3; |
duke@435 | 1616 | |
jrose@1957 | 1617 | case JVM_CONSTANT_MethodHandle: |
iklam@5760 | 1618 | case JVM_CONSTANT_MethodHandleInError: |
jrose@1957 | 1619 | return 4; //tag, ref_kind, ref_index |
jrose@1957 | 1620 | |
duke@435 | 1621 | case JVM_CONSTANT_Integer: |
duke@435 | 1622 | case JVM_CONSTANT_Float: |
duke@435 | 1623 | case JVM_CONSTANT_Fieldref: |
duke@435 | 1624 | case JVM_CONSTANT_Methodref: |
duke@435 | 1625 | case JVM_CONSTANT_InterfaceMethodref: |
duke@435 | 1626 | case JVM_CONSTANT_NameAndType: |
jrose@2268 | 1627 | return 5; |
jrose@2268 | 1628 | |
jrose@2015 | 1629 | case JVM_CONSTANT_InvokeDynamic: |
jrose@2353 | 1630 | // u1 tag, u2 bsm, u2 nt |
jrose@2353 | 1631 | return 5; |
duke@435 | 1632 | |
duke@435 | 1633 | case JVM_CONSTANT_Long: |
duke@435 | 1634 | case JVM_CONSTANT_Double: |
duke@435 | 1635 | return 9; |
duke@435 | 1636 | } |
duke@435 | 1637 | assert(false, "cpool_entry_size: Invalid constant pool entry tag"); |
duke@435 | 1638 | return 1; |
duke@435 | 1639 | } /* end cpool_entry_size */ |
duke@435 | 1640 | |
duke@435 | 1641 | |
duke@435 | 1642 | // SymbolHashMap is used to find a constant pool index from a string. |
duke@435 | 1643 | // This function fills in SymbolHashMaps, one for utf8s and one for |
duke@435 | 1644 | // class names, returns size of the cpool raw bytes. |
coleenp@4037 | 1645 | jint ConstantPool::hash_entries_to(SymbolHashMap *symmap, |
duke@435 | 1646 | SymbolHashMap *classmap) { |
duke@435 | 1647 | jint size = 0; |
duke@435 | 1648 | |
duke@435 | 1649 | for (u2 idx = 1; idx < length(); idx++) { |
duke@435 | 1650 | u2 tag = tag_at(idx).value(); |
duke@435 | 1651 | size += cpool_entry_size(idx); |
duke@435 | 1652 | |
duke@435 | 1653 | switch(tag) { |
duke@435 | 1654 | case JVM_CONSTANT_Utf8: { |
coleenp@2497 | 1655 | Symbol* sym = symbol_at(idx); |
duke@435 | 1656 | symmap->add_entry(sym, idx); |
duke@435 | 1657 | DBG(printf("adding symbol entry %s = %d\n", sym->as_utf8(), idx)); |
duke@435 | 1658 | break; |
duke@435 | 1659 | } |
duke@435 | 1660 | case JVM_CONSTANT_Class: |
duke@435 | 1661 | case JVM_CONSTANT_UnresolvedClass: |
duke@435 | 1662 | case JVM_CONSTANT_UnresolvedClassInError: { |
coleenp@2497 | 1663 | Symbol* sym = klass_name_at(idx); |
duke@435 | 1664 | classmap->add_entry(sym, idx); |
duke@435 | 1665 | DBG(printf("adding class entry %s = %d\n", sym->as_utf8(), idx)); |
duke@435 | 1666 | break; |
duke@435 | 1667 | } |
duke@435 | 1668 | case JVM_CONSTANT_Long: |
duke@435 | 1669 | case JVM_CONSTANT_Double: { |
duke@435 | 1670 | idx++; // Both Long and Double take two cpool slots |
duke@435 | 1671 | break; |
duke@435 | 1672 | } |
duke@435 | 1673 | } |
duke@435 | 1674 | } |
duke@435 | 1675 | return size; |
duke@435 | 1676 | } /* end hash_utf8_entries_to */ |
duke@435 | 1677 | |
duke@435 | 1678 | |
duke@435 | 1679 | // Copy cpool bytes. |
duke@435 | 1680 | // Returns: |
duke@435 | 1681 | // 0, in case of OutOfMemoryError |
duke@435 | 1682 | // -1, in case of internal error |
duke@435 | 1683 | // > 0, count of the raw cpool bytes that have been copied |
coleenp@4037 | 1684 | int ConstantPool::copy_cpool_bytes(int cpool_size, |
duke@435 | 1685 | SymbolHashMap* tbl, |
duke@435 | 1686 | unsigned char *bytes) { |
duke@435 | 1687 | u2 idx1, idx2; |
duke@435 | 1688 | jint size = 0; |
duke@435 | 1689 | jint cnt = length(); |
duke@435 | 1690 | unsigned char *start_bytes = bytes; |
duke@435 | 1691 | |
duke@435 | 1692 | for (jint idx = 1; idx < cnt; idx++) { |
duke@435 | 1693 | u1 tag = tag_at(idx).value(); |
duke@435 | 1694 | jint ent_size = cpool_entry_size(idx); |
duke@435 | 1695 | |
duke@435 | 1696 | assert(size + ent_size <= cpool_size, "Size mismatch"); |
duke@435 | 1697 | |
duke@435 | 1698 | *bytes = tag; |
duke@435 | 1699 | DBG(printf("#%03hd tag=%03hd, ", idx, tag)); |
duke@435 | 1700 | switch(tag) { |
duke@435 | 1701 | case JVM_CONSTANT_Invalid: { |
duke@435 | 1702 | DBG(printf("JVM_CONSTANT_Invalid")); |
duke@435 | 1703 | break; |
duke@435 | 1704 | } |
duke@435 | 1705 | case JVM_CONSTANT_Unicode: { |
duke@435 | 1706 | assert(false, "Wrong constant pool tag: JVM_CONSTANT_Unicode"); |
duke@435 | 1707 | DBG(printf("JVM_CONSTANT_Unicode")); |
duke@435 | 1708 | break; |
duke@435 | 1709 | } |
duke@435 | 1710 | case JVM_CONSTANT_Utf8: { |
coleenp@2497 | 1711 | Symbol* sym = symbol_at(idx); |
duke@435 | 1712 | char* str = sym->as_utf8(); |
duke@435 | 1713 | // Warning! It's crashing on x86 with len = sym->utf8_length() |
duke@435 | 1714 | int len = (int) strlen(str); |
duke@435 | 1715 | Bytes::put_Java_u2((address) (bytes+1), (u2) len); |
duke@435 | 1716 | for (int i = 0; i < len; i++) { |
duke@435 | 1717 | bytes[3+i] = (u1) str[i]; |
duke@435 | 1718 | } |
duke@435 | 1719 | DBG(printf("JVM_CONSTANT_Utf8: %s ", str)); |
duke@435 | 1720 | break; |
duke@435 | 1721 | } |
duke@435 | 1722 | case JVM_CONSTANT_Integer: { |
duke@435 | 1723 | jint val = int_at(idx); |
duke@435 | 1724 | Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); |
duke@435 | 1725 | break; |
duke@435 | 1726 | } |
duke@435 | 1727 | case JVM_CONSTANT_Float: { |
duke@435 | 1728 | jfloat val = float_at(idx); |
duke@435 | 1729 | Bytes::put_Java_u4((address) (bytes+1), *(u4*)&val); |
duke@435 | 1730 | break; |
duke@435 | 1731 | } |
duke@435 | 1732 | case JVM_CONSTANT_Long: { |
duke@435 | 1733 | jlong val = long_at(idx); |
duke@435 | 1734 | Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); |
duke@435 | 1735 | idx++; // Long takes two cpool slots |
duke@435 | 1736 | break; |
duke@435 | 1737 | } |
duke@435 | 1738 | case JVM_CONSTANT_Double: { |
duke@435 | 1739 | jdouble val = double_at(idx); |
duke@435 | 1740 | Bytes::put_Java_u8((address) (bytes+1), *(u8*)&val); |
duke@435 | 1741 | idx++; // Double takes two cpool slots |
duke@435 | 1742 | break; |
duke@435 | 1743 | } |
duke@435 | 1744 | case JVM_CONSTANT_Class: |
duke@435 | 1745 | case JVM_CONSTANT_UnresolvedClass: |
duke@435 | 1746 | case JVM_CONSTANT_UnresolvedClassInError: { |
duke@435 | 1747 | *bytes = JVM_CONSTANT_Class; |
coleenp@2497 | 1748 | Symbol* sym = klass_name_at(idx); |
duke@435 | 1749 | idx1 = tbl->symbol_to_value(sym); |
duke@435 | 1750 | assert(idx1 != 0, "Have not found a hashtable entry"); |
duke@435 | 1751 | Bytes::put_Java_u2((address) (bytes+1), idx1); |
duke@435 | 1752 | DBG(printf("JVM_CONSTANT_Class: idx=#%03hd, %s", idx1, sym->as_utf8())); |
duke@435 | 1753 | break; |
duke@435 | 1754 | } |
duke@435 | 1755 | case JVM_CONSTANT_String: { |
duke@435 | 1756 | *bytes = JVM_CONSTANT_String; |
coleenp@2497 | 1757 | Symbol* sym = unresolved_string_at(idx); |
duke@435 | 1758 | idx1 = tbl->symbol_to_value(sym); |
duke@435 | 1759 | assert(idx1 != 0, "Have not found a hashtable entry"); |
duke@435 | 1760 | Bytes::put_Java_u2((address) (bytes+1), idx1); |
mikael@4889 | 1761 | DBG(printf("JVM_CONSTANT_String: idx=#%03hd, %s", idx1, sym->as_utf8())); |
duke@435 | 1762 | break; |
duke@435 | 1763 | } |
duke@435 | 1764 | case JVM_CONSTANT_Fieldref: |
duke@435 | 1765 | case JVM_CONSTANT_Methodref: |
duke@435 | 1766 | case JVM_CONSTANT_InterfaceMethodref: { |
duke@435 | 1767 | idx1 = uncached_klass_ref_index_at(idx); |
duke@435 | 1768 | idx2 = uncached_name_and_type_ref_index_at(idx); |
duke@435 | 1769 | Bytes::put_Java_u2((address) (bytes+1), idx1); |
duke@435 | 1770 | Bytes::put_Java_u2((address) (bytes+3), idx2); |
duke@435 | 1771 | DBG(printf("JVM_CONSTANT_Methodref: %hd %hd", idx1, idx2)); |
duke@435 | 1772 | break; |
duke@435 | 1773 | } |
duke@435 | 1774 | case JVM_CONSTANT_NameAndType: { |
duke@435 | 1775 | idx1 = name_ref_index_at(idx); |
duke@435 | 1776 | idx2 = signature_ref_index_at(idx); |
duke@435 | 1777 | Bytes::put_Java_u2((address) (bytes+1), idx1); |
duke@435 | 1778 | Bytes::put_Java_u2((address) (bytes+3), idx2); |
duke@435 | 1779 | DBG(printf("JVM_CONSTANT_NameAndType: %hd %hd", idx1, idx2)); |
duke@435 | 1780 | break; |
duke@435 | 1781 | } |
duke@435 | 1782 | case JVM_CONSTANT_ClassIndex: { |
duke@435 | 1783 | *bytes = JVM_CONSTANT_Class; |
duke@435 | 1784 | idx1 = klass_index_at(idx); |
duke@435 | 1785 | Bytes::put_Java_u2((address) (bytes+1), idx1); |
duke@435 | 1786 | DBG(printf("JVM_CONSTANT_ClassIndex: %hd", idx1)); |
duke@435 | 1787 | break; |
duke@435 | 1788 | } |
duke@435 | 1789 | case JVM_CONSTANT_StringIndex: { |
duke@435 | 1790 | *bytes = JVM_CONSTANT_String; |
duke@435 | 1791 | idx1 = string_index_at(idx); |
duke@435 | 1792 | Bytes::put_Java_u2((address) (bytes+1), idx1); |
duke@435 | 1793 | DBG(printf("JVM_CONSTANT_StringIndex: %hd", idx1)); |
duke@435 | 1794 | break; |
duke@435 | 1795 | } |
coleenp@4037 | 1796 | case JVM_CONSTANT_MethodHandle: |
coleenp@4037 | 1797 | case JVM_CONSTANT_MethodHandleInError: { |
jrose@1957 | 1798 | *bytes = JVM_CONSTANT_MethodHandle; |
iklam@5760 | 1799 | int kind = method_handle_ref_kind_at_error_ok(idx); |
iklam@5760 | 1800 | idx1 = method_handle_index_at_error_ok(idx); |
jrose@1957 | 1801 | *(bytes+1) = (unsigned char) kind; |
jrose@1957 | 1802 | Bytes::put_Java_u2((address) (bytes+2), idx1); |
jrose@1957 | 1803 | DBG(printf("JVM_CONSTANT_MethodHandle: %d %hd", kind, idx1)); |
jrose@1957 | 1804 | break; |
jrose@1957 | 1805 | } |
coleenp@4037 | 1806 | case JVM_CONSTANT_MethodType: |
coleenp@4037 | 1807 | case JVM_CONSTANT_MethodTypeInError: { |
jrose@1957 | 1808 | *bytes = JVM_CONSTANT_MethodType; |
iklam@5760 | 1809 | idx1 = method_type_index_at_error_ok(idx); |
jrose@1957 | 1810 | Bytes::put_Java_u2((address) (bytes+1), idx1); |
jrose@1957 | 1811 | DBG(printf("JVM_CONSTANT_MethodType: %hd", idx1)); |
jrose@1957 | 1812 | break; |
jrose@1957 | 1813 | } |
jrose@2015 | 1814 | case JVM_CONSTANT_InvokeDynamic: { |
jrose@2353 | 1815 | *bytes = tag; |
jrose@2353 | 1816 | idx1 = extract_low_short_from_int(*int_at_addr(idx)); |
jrose@2353 | 1817 | idx2 = extract_high_short_from_int(*int_at_addr(idx)); |
jrose@2353 | 1818 | assert(idx2 == invoke_dynamic_name_and_type_ref_index_at(idx), "correct half of u4"); |
jrose@2015 | 1819 | Bytes::put_Java_u2((address) (bytes+1), idx1); |
jrose@2015 | 1820 | Bytes::put_Java_u2((address) (bytes+3), idx2); |
jrose@2353 | 1821 | DBG(printf("JVM_CONSTANT_InvokeDynamic: %hd %hd", idx1, idx2)); |
jrose@2015 | 1822 | break; |
jrose@2015 | 1823 | } |
duke@435 | 1824 | } |
duke@435 | 1825 | DBG(printf("\n")); |
duke@435 | 1826 | bytes += ent_size; |
duke@435 | 1827 | size += ent_size; |
duke@435 | 1828 | } |
duke@435 | 1829 | assert(size == cpool_size, "Size mismatch"); |
duke@435 | 1830 | |
duke@435 | 1831 | // Keep temorarily for debugging until it's stable. |
duke@435 | 1832 | DBG(print_cpool_bytes(cnt, start_bytes)); |
duke@435 | 1833 | return (int)(bytes - start_bytes); |
duke@435 | 1834 | } /* end copy_cpool_bytes */ |
duke@435 | 1835 | |
mikael@4889 | 1836 | #undef DBG |
mikael@4889 | 1837 | |
duke@435 | 1838 | |
coleenp@4037 | 1839 | void ConstantPool::set_on_stack(const bool value) { |
coleenp@4490 | 1840 | if (value) { |
coleenp@4490 | 1841 | _flags |= _on_stack; |
coleenp@4490 | 1842 | } else { |
coleenp@4490 | 1843 | _flags &= ~_on_stack; |
coleenp@4490 | 1844 | } |
coleenp@4037 | 1845 | if (value) MetadataOnStackMark::record(this); |
coleenp@4037 | 1846 | } |
coleenp@4037 | 1847 | |
coleenp@4037 | 1848 | // JSR 292 support for patching constant pool oops after the class is linked and |
coleenp@4037 | 1849 | // the oop array for resolved references are created. |
coleenp@4037 | 1850 | // We can't do this during classfile parsing, which is how the other indexes are |
coleenp@4037 | 1851 | // patched. The other patches are applied early for some error checking |
coleenp@4037 | 1852 | // so only defer the pseudo_strings. |
coleenp@4037 | 1853 | void ConstantPool::patch_resolved_references( |
coleenp@4037 | 1854 | GrowableArray<Handle>* cp_patches) { |
coleenp@4037 | 1855 | assert(EnableInvokeDynamic, ""); |
coleenp@4037 | 1856 | for (int index = 1; index < cp_patches->length(); index++) { // Index 0 is unused |
coleenp@4037 | 1857 | Handle patch = cp_patches->at(index); |
coleenp@4037 | 1858 | if (patch.not_null()) { |
coleenp@4037 | 1859 | assert (tag_at(index).is_string(), "should only be string left"); |
coleenp@4037 | 1860 | // Patching a string means pre-resolving it. |
coleenp@4037 | 1861 | // The spelling in the constant pool is ignored. |
coleenp@4037 | 1862 | // The constant reference may be any object whatever. |
coleenp@4037 | 1863 | // If it is not a real interned string, the constant is referred |
coleenp@4037 | 1864 | // to as a "pseudo-string", and must be presented to the CP |
coleenp@4037 | 1865 | // explicitly, because it may require scavenging. |
coleenp@4037 | 1866 | int obj_index = cp_to_object_index(index); |
coleenp@4037 | 1867 | pseudo_string_at_put(index, obj_index, patch()); |
coleenp@4037 | 1868 | DEBUG_ONLY(cp_patches->at_put(index, Handle());) |
coleenp@4037 | 1869 | } |
coleenp@4037 | 1870 | } |
coleenp@4037 | 1871 | #ifdef ASSERT |
coleenp@4037 | 1872 | // Ensure that all the patches have been used. |
coleenp@4037 | 1873 | for (int index = 0; index < cp_patches->length(); index++) { |
coleenp@4037 | 1874 | assert(cp_patches->at(index).is_null(), |
coleenp@4037 | 1875 | err_msg("Unused constant pool patch at %d in class file %s", |
coleenp@4037 | 1876 | index, |
coleenp@4251 | 1877 | pool_holder()->external_name())); |
coleenp@4037 | 1878 | } |
coleenp@4037 | 1879 | #endif // ASSERT |
coleenp@4037 | 1880 | } |
coleenp@4037 | 1881 | |
coleenp@4037 | 1882 | #ifndef PRODUCT |
coleenp@4037 | 1883 | |
coleenp@4037 | 1884 | // CompileTheWorld support. Preload all classes loaded references in the passed in constantpool |
coleenp@4037 | 1885 | void ConstantPool::preload_and_initialize_all_classes(ConstantPool* obj, TRAPS) { |
coleenp@4037 | 1886 | guarantee(obj->is_constantPool(), "object must be constant pool"); |
coleenp@4037 | 1887 | constantPoolHandle cp(THREAD, (ConstantPool*)obj); |
coleenp@4037 | 1888 | guarantee(cp->pool_holder() != NULL, "must be fully loaded"); |
coleenp@4037 | 1889 | |
coleenp@4037 | 1890 | for (int i = 0; i< cp->length(); i++) { |
coleenp@4037 | 1891 | if (cp->tag_at(i).is_unresolved_klass()) { |
coleenp@4037 | 1892 | // This will force loading of the class |
coleenp@4037 | 1893 | Klass* klass = cp->klass_at(i, CHECK); |
coleenp@4037 | 1894 | if (klass->oop_is_instance()) { |
coleenp@4037 | 1895 | // Force initialization of class |
coleenp@4037 | 1896 | InstanceKlass::cast(klass)->initialize(CHECK); |
coleenp@4037 | 1897 | } |
coleenp@4037 | 1898 | } |
coleenp@4037 | 1899 | } |
coleenp@4037 | 1900 | } |
coleenp@4037 | 1901 | |
coleenp@4037 | 1902 | #endif |
coleenp@4037 | 1903 | |
coleenp@4037 | 1904 | |
coleenp@4037 | 1905 | // Printing |
coleenp@4037 | 1906 | |
coleenp@4037 | 1907 | void ConstantPool::print_on(outputStream* st) const { |
coleenp@4037 | 1908 | EXCEPTION_MARK; |
coleenp@4037 | 1909 | assert(is_constantPool(), "must be constantPool"); |
coleenp@4037 | 1910 | st->print_cr(internal_name()); |
coleenp@4037 | 1911 | if (flags() != 0) { |
coleenp@4037 | 1912 | st->print(" - flags: 0x%x", flags()); |
coleenp@4037 | 1913 | if (has_preresolution()) st->print(" has_preresolution"); |
coleenp@4490 | 1914 | if (on_stack()) st->print(" on_stack"); |
coleenp@4037 | 1915 | st->cr(); |
coleenp@4037 | 1916 | } |
coleenp@4037 | 1917 | if (pool_holder() != NULL) { |
coleenp@4037 | 1918 | st->print_cr(" - holder: " INTPTR_FORMAT, pool_holder()); |
coleenp@4037 | 1919 | } |
coleenp@4037 | 1920 | st->print_cr(" - cache: " INTPTR_FORMAT, cache()); |
hseigel@5784 | 1921 | st->print_cr(" - resolved_references: " INTPTR_FORMAT, (void *)resolved_references()); |
coleenp@4037 | 1922 | st->print_cr(" - reference_map: " INTPTR_FORMAT, reference_map()); |
coleenp@4037 | 1923 | |
coleenp@4037 | 1924 | for (int index = 1; index < length(); index++) { // Index 0 is unused |
coleenp@4037 | 1925 | ((ConstantPool*)this)->print_entry_on(index, st); |
coleenp@4037 | 1926 | switch (tag_at(index).value()) { |
coleenp@4037 | 1927 | case JVM_CONSTANT_Long : |
coleenp@4037 | 1928 | case JVM_CONSTANT_Double : |
coleenp@4037 | 1929 | index++; // Skip entry following eigth-byte constant |
coleenp@4037 | 1930 | } |
coleenp@4037 | 1931 | |
coleenp@4037 | 1932 | } |
coleenp@4037 | 1933 | st->cr(); |
coleenp@4037 | 1934 | } |
coleenp@4037 | 1935 | |
coleenp@4037 | 1936 | // Print one constant pool entry |
coleenp@4037 | 1937 | void ConstantPool::print_entry_on(const int index, outputStream* st) { |
coleenp@4037 | 1938 | EXCEPTION_MARK; |
coleenp@4037 | 1939 | st->print(" - %3d : ", index); |
coleenp@4037 | 1940 | tag_at(index).print_on(st); |
coleenp@4037 | 1941 | st->print(" : "); |
coleenp@4037 | 1942 | switch (tag_at(index).value()) { |
coleenp@4037 | 1943 | case JVM_CONSTANT_Class : |
coleenp@4037 | 1944 | { Klass* k = klass_at(index, CATCH); |
morris@4782 | 1945 | guarantee(k != NULL, "need klass"); |
coleenp@4037 | 1946 | k->print_value_on(st); |
coleenp@4037 | 1947 | st->print(" {0x%lx}", (address)k); |
coleenp@4037 | 1948 | } |
coleenp@4037 | 1949 | break; |
coleenp@4037 | 1950 | case JVM_CONSTANT_Fieldref : |
coleenp@4037 | 1951 | case JVM_CONSTANT_Methodref : |
coleenp@4037 | 1952 | case JVM_CONSTANT_InterfaceMethodref : |
coleenp@4037 | 1953 | st->print("klass_index=%d", uncached_klass_ref_index_at(index)); |
coleenp@4037 | 1954 | st->print(" name_and_type_index=%d", uncached_name_and_type_ref_index_at(index)); |
coleenp@4037 | 1955 | break; |
coleenp@4037 | 1956 | case JVM_CONSTANT_String : |
coleenp@4643 | 1957 | if (is_pseudo_string_at(index)) { |
coleenp@4643 | 1958 | oop anObj = pseudo_string_at(index); |
coleenp@4643 | 1959 | anObj->print_value_on(st); |
coleenp@4643 | 1960 | st->print(" {0x%lx}", (address)anObj); |
coleenp@4643 | 1961 | } else { |
coleenp@4643 | 1962 | unresolved_string_at(index)->print_value_on(st); |
coleenp@4643 | 1963 | } |
coleenp@4037 | 1964 | break; |
coleenp@4037 | 1965 | case JVM_CONSTANT_Integer : |
coleenp@4037 | 1966 | st->print("%d", int_at(index)); |
coleenp@4037 | 1967 | break; |
coleenp@4037 | 1968 | case JVM_CONSTANT_Float : |
coleenp@4037 | 1969 | st->print("%f", float_at(index)); |
coleenp@4037 | 1970 | break; |
coleenp@4037 | 1971 | case JVM_CONSTANT_Long : |
coleenp@4037 | 1972 | st->print_jlong(long_at(index)); |
coleenp@4037 | 1973 | break; |
coleenp@4037 | 1974 | case JVM_CONSTANT_Double : |
coleenp@4037 | 1975 | st->print("%lf", double_at(index)); |
coleenp@4037 | 1976 | break; |
coleenp@4037 | 1977 | case JVM_CONSTANT_NameAndType : |
coleenp@4037 | 1978 | st->print("name_index=%d", name_ref_index_at(index)); |
coleenp@4037 | 1979 | st->print(" signature_index=%d", signature_ref_index_at(index)); |
coleenp@4037 | 1980 | break; |
coleenp@4037 | 1981 | case JVM_CONSTANT_Utf8 : |
coleenp@4037 | 1982 | symbol_at(index)->print_value_on(st); |
coleenp@4037 | 1983 | break; |
coleenp@4037 | 1984 | case JVM_CONSTANT_UnresolvedClass : // fall-through |
coleenp@4037 | 1985 | case JVM_CONSTANT_UnresolvedClassInError: { |
coleenp@4037 | 1986 | // unresolved_klass_at requires lock or safe world. |
coleenp@4037 | 1987 | CPSlot entry = slot_at(index); |
coleenp@4037 | 1988 | if (entry.is_resolved()) { |
coleenp@4037 | 1989 | entry.get_klass()->print_value_on(st); |
coleenp@4037 | 1990 | } else { |
coleenp@4037 | 1991 | entry.get_symbol()->print_value_on(st); |
coleenp@4037 | 1992 | } |
coleenp@4037 | 1993 | } |
coleenp@4037 | 1994 | break; |
coleenp@4037 | 1995 | case JVM_CONSTANT_MethodHandle : |
coleenp@4037 | 1996 | case JVM_CONSTANT_MethodHandleInError : |
iklam@5760 | 1997 | st->print("ref_kind=%d", method_handle_ref_kind_at_error_ok(index)); |
iklam@5760 | 1998 | st->print(" ref_index=%d", method_handle_index_at_error_ok(index)); |
coleenp@4037 | 1999 | break; |
coleenp@4037 | 2000 | case JVM_CONSTANT_MethodType : |
coleenp@4037 | 2001 | case JVM_CONSTANT_MethodTypeInError : |
iklam@5760 | 2002 | st->print("signature_index=%d", method_type_index_at_error_ok(index)); |
coleenp@4037 | 2003 | break; |
coleenp@4037 | 2004 | case JVM_CONSTANT_InvokeDynamic : |
coleenp@4037 | 2005 | { |
coleenp@4037 | 2006 | st->print("bootstrap_method_index=%d", invoke_dynamic_bootstrap_method_ref_index_at(index)); |
coleenp@4037 | 2007 | st->print(" name_and_type_index=%d", invoke_dynamic_name_and_type_ref_index_at(index)); |
coleenp@4037 | 2008 | int argc = invoke_dynamic_argument_count_at(index); |
coleenp@4037 | 2009 | if (argc > 0) { |
coleenp@4037 | 2010 | for (int arg_i = 0; arg_i < argc; arg_i++) { |
coleenp@4037 | 2011 | int arg = invoke_dynamic_argument_index_at(index, arg_i); |
coleenp@4037 | 2012 | st->print((arg_i == 0 ? " arguments={%d" : ", %d"), arg); |
coleenp@4037 | 2013 | } |
coleenp@4037 | 2014 | st->print("}"); |
coleenp@4037 | 2015 | } |
coleenp@4037 | 2016 | } |
coleenp@4037 | 2017 | break; |
coleenp@4037 | 2018 | default: |
coleenp@4037 | 2019 | ShouldNotReachHere(); |
coleenp@4037 | 2020 | break; |
coleenp@4037 | 2021 | } |
coleenp@4037 | 2022 | st->cr(); |
coleenp@4037 | 2023 | } |
coleenp@4037 | 2024 | |
coleenp@4037 | 2025 | void ConstantPool::print_value_on(outputStream* st) const { |
coleenp@4037 | 2026 | assert(is_constantPool(), "must be constantPool"); |
coleenp@4037 | 2027 | st->print("constant pool [%d]", length()); |
coleenp@4037 | 2028 | if (has_preresolution()) st->print("/preresolution"); |
coleenp@4037 | 2029 | if (operands() != NULL) st->print("/operands[%d]", operands()->length()); |
coleenp@4037 | 2030 | print_address_on(st); |
coleenp@4037 | 2031 | st->print(" for "); |
coleenp@4037 | 2032 | pool_holder()->print_value_on(st); |
coleenp@4037 | 2033 | if (pool_holder() != NULL) { |
coleenp@4251 | 2034 | bool extra = (pool_holder()->constants() != this); |
coleenp@4037 | 2035 | if (extra) st->print(" (extra)"); |
coleenp@4037 | 2036 | } |
coleenp@4037 | 2037 | if (cache() != NULL) { |
coleenp@4037 | 2038 | st->print(" cache=" PTR_FORMAT, cache()); |
coleenp@4037 | 2039 | } |
coleenp@4037 | 2040 | } |
coleenp@4037 | 2041 | |
acorn@4497 | 2042 | #if INCLUDE_SERVICES |
acorn@4497 | 2043 | // Size Statistics |
acorn@4497 | 2044 | void ConstantPool::collect_statistics(KlassSizeStats *sz) const { |
acorn@4497 | 2045 | sz->_cp_all_bytes += (sz->_cp_bytes = sz->count(this)); |
acorn@4497 | 2046 | sz->_cp_all_bytes += (sz->_cp_tags_bytes = sz->count_array(tags())); |
acorn@4497 | 2047 | sz->_cp_all_bytes += (sz->_cp_cache_bytes = sz->count(cache())); |
acorn@4497 | 2048 | sz->_cp_all_bytes += (sz->_cp_operands_bytes = sz->count_array(operands())); |
acorn@4497 | 2049 | sz->_cp_all_bytes += (sz->_cp_refmap_bytes = sz->count_array(reference_map())); |
acorn@4497 | 2050 | |
acorn@4497 | 2051 | sz->_ro_bytes += sz->_cp_operands_bytes + sz->_cp_tags_bytes + |
acorn@4497 | 2052 | sz->_cp_refmap_bytes; |
acorn@4497 | 2053 | sz->_rw_bytes += sz->_cp_bytes + sz->_cp_cache_bytes; |
acorn@4497 | 2054 | } |
acorn@4497 | 2055 | #endif // INCLUDE_SERVICES |
coleenp@4037 | 2056 | |
coleenp@4037 | 2057 | // Verification |
coleenp@4037 | 2058 | |
coleenp@4037 | 2059 | void ConstantPool::verify_on(outputStream* st) { |
coleenp@4037 | 2060 | guarantee(is_constantPool(), "object must be constant pool"); |
coleenp@4037 | 2061 | for (int i = 0; i< length(); i++) { |
coleenp@4037 | 2062 | constantTag tag = tag_at(i); |
coleenp@4037 | 2063 | CPSlot entry = slot_at(i); |
coleenp@4037 | 2064 | if (tag.is_klass()) { |
coleenp@4037 | 2065 | if (entry.is_resolved()) { |
coleenp@4037 | 2066 | guarantee(entry.get_klass()->is_klass(), "should be klass"); |
coleenp@4037 | 2067 | } |
coleenp@4037 | 2068 | } else if (tag.is_unresolved_klass()) { |
coleenp@4037 | 2069 | if (entry.is_resolved()) { |
coleenp@4037 | 2070 | guarantee(entry.get_klass()->is_klass(), "should be klass"); |
coleenp@4037 | 2071 | } |
coleenp@4037 | 2072 | } else if (tag.is_symbol()) { |
coleenp@4037 | 2073 | guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count"); |
coleenp@4037 | 2074 | } else if (tag.is_string()) { |
coleenp@4037 | 2075 | guarantee(entry.get_symbol()->refcount() != 0, "should have nonzero reference count"); |
coleenp@4037 | 2076 | } |
coleenp@4037 | 2077 | } |
coleenp@4037 | 2078 | if (cache() != NULL) { |
coleenp@4037 | 2079 | // Note: cache() can be NULL before a class is completely setup or |
coleenp@4037 | 2080 | // in temporary constant pools used during constant pool merging |
coleenp@4037 | 2081 | guarantee(cache()->is_constantPoolCache(), "should be constant pool cache"); |
coleenp@4037 | 2082 | } |
coleenp@4037 | 2083 | if (pool_holder() != NULL) { |
coleenp@4037 | 2084 | // Note: pool_holder() can be NULL in temporary constant pools |
coleenp@4037 | 2085 | // used during constant pool merging |
coleenp@4037 | 2086 | guarantee(pool_holder()->is_klass(), "should be klass"); |
coleenp@4037 | 2087 | } |
coleenp@4037 | 2088 | } |
coleenp@4037 | 2089 | |
coleenp@4037 | 2090 | |
coleenp@2497 | 2091 | void SymbolHashMap::add_entry(Symbol* sym, u2 value) { |
duke@435 | 2092 | char *str = sym->as_utf8(); |
duke@435 | 2093 | unsigned int hash = compute_hash(str, sym->utf8_length()); |
duke@435 | 2094 | unsigned int index = hash % table_size(); |
duke@435 | 2095 | |
duke@435 | 2096 | // check if already in map |
duke@435 | 2097 | // we prefer the first entry since it is more likely to be what was used in |
duke@435 | 2098 | // the class file |
duke@435 | 2099 | for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { |
duke@435 | 2100 | assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); |
duke@435 | 2101 | if (en->hash() == hash && en->symbol() == sym) { |
duke@435 | 2102 | return; // already there |
duke@435 | 2103 | } |
duke@435 | 2104 | } |
duke@435 | 2105 | |
duke@435 | 2106 | SymbolHashMapEntry* entry = new SymbolHashMapEntry(hash, sym, value); |
duke@435 | 2107 | entry->set_next(bucket(index)); |
duke@435 | 2108 | _buckets[index].set_entry(entry); |
duke@435 | 2109 | assert(entry->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); |
duke@435 | 2110 | } |
duke@435 | 2111 | |
coleenp@2497 | 2112 | SymbolHashMapEntry* SymbolHashMap::find_entry(Symbol* sym) { |
duke@435 | 2113 | assert(sym != NULL, "SymbolHashMap::find_entry - symbol is NULL"); |
duke@435 | 2114 | char *str = sym->as_utf8(); |
duke@435 | 2115 | int len = sym->utf8_length(); |
duke@435 | 2116 | unsigned int hash = SymbolHashMap::compute_hash(str, len); |
duke@435 | 2117 | unsigned int index = hash % table_size(); |
duke@435 | 2118 | for (SymbolHashMapEntry *en = bucket(index); en != NULL; en = en->next()) { |
duke@435 | 2119 | assert(en->symbol() != NULL, "SymbolHashMapEntry symbol is NULL"); |
duke@435 | 2120 | if (en->hash() == hash && en->symbol() == sym) { |
duke@435 | 2121 | return en; |
duke@435 | 2122 | } |
duke@435 | 2123 | } |
duke@435 | 2124 | return NULL; |
duke@435 | 2125 | } |