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annotate src/hotspot/share/oops/instanceKlass.cpp @ 58673:eee45238844e

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8240205: Avoid PackageEntry lookup when loading shared classes Summary: Do the PackageEntry lookup at one place and then pass it along to the subsequently called functions which need it. Reviewed-by: redestad, lfoltan
author ccheung
date Fri, 03 Apr 2020 14:26:42 -0700
parents c0dd28941d68
children 920562fbf6b9
rev   line source
duke@1 1 /*
coleenp@57609 2 * Copyright (c) 1997, 2020, Oracle and/or its affiliates. All rights reserved.
duke@1 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@1 4 *
duke@1 5 * This code is free software; you can redistribute it and/or modify it
duke@1 6 * under the terms of the GNU General Public License version 2 only, as
duke@1 7 * published by the Free Software Foundation.
duke@1 8 *
duke@1 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@1 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@1 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@1 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@1 13 * accompanied this code).
duke@1 14 *
duke@1 15 * You should have received a copy of the GNU General Public License version
duke@1 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@1 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@1 18 *
trims@5547 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@5547 20 * or visit www.oracle.com if you need additional information or have any
trims@5547 21 * questions.
duke@1 22 *
duke@1 23 */
duke@1 24
stefank@7397 25 #include "precompiled.hpp"
coleenp@47765 26 #include "jvm.h"
kvn@42650 27 #include "aot/aotLoader.hpp"
mgronlun@34666 28 #include "classfile/classFileParser.hpp"
mockner@35917 29 #include "classfile/classFileStream.hpp"
kvn@42650 30 #include "classfile/classLoader.hpp"
coleenp@49824 31 #include "classfile/classLoaderData.inline.hpp"
stefank@7397 32 #include "classfile/javaClasses.hpp"
alanb@42307 33 #include "classfile/moduleEntry.hpp"
stefank@54786 34 #include "classfile/symbolTable.hpp"
stefank@7397 35 #include "classfile/systemDictionary.hpp"
iklam@39713 36 #include "classfile/systemDictionaryShared.hpp"
stefank@7397 37 #include "classfile/verifier.hpp"
stefank@7397 38 #include "classfile/vmSymbols.hpp"
vlivanov@34195 39 #include "code/dependencyContext.hpp"
stefank@7397 40 #include "compiler/compileBroker.hpp"
pliden@30764 41 #include "gc/shared/collectedHeap.inline.hpp"
stefank@7397 42 #include "interpreter/oopMapCache.hpp"
stefank@7397 43 #include "interpreter/rewriter.hpp"
stefank@7397 44 #include "jvmtifiles/jvmti.h"
mockner@35917 45 #include "logging/log.hpp"
rprotacio@46444 46 #include "logging/logMessage.hpp"
stuefe@46701 47 #include "logging/logStream.hpp"
stefank@49360 48 #include "memory/allocation.inline.hpp"
stefank@25356 49 #include "memory/iterator.inline.hpp"
coleenp@13728 50 #include "memory/metadataFactory.hpp"
iklam@46746 51 #include "memory/metaspaceClosure.hpp"
jiangli@41182 52 #include "memory/metaspaceShared.hpp"
stefank@7397 53 #include "memory/oopFactory.hpp"
jprovino@37248 54 #include "memory/resourceArea.hpp"
stefank@54786 55 #include "memory/universe.hpp"
coleenp@56922 56 #include "oops/fieldStreams.inline.hpp"
redestad@53838 57 #include "oops/constantPool.hpp"
coleenp@13728 58 #include "oops/instanceClassLoaderKlass.hpp"
stefank@30150 59 #include "oops/instanceKlass.inline.hpp"
never@8725 60 #include "oops/instanceMirrorKlass.hpp"
stefank@7397 61 #include "oops/instanceOop.hpp"
coleenp@13728 62 #include "oops/klass.inline.hpp"
coleenp@13728 63 #include "oops/method.hpp"
stefank@7397 64 #include "oops/oop.inline.hpp"
vromero@57233 65 #include "oops/recordComponent.hpp"
coleenp@8076 66 #include "oops/symbol.hpp"
stefank@7397 67 #include "prims/jvmtiExport.hpp"
pliden@30764 68 #include "prims/jvmtiRedefineClasses.hpp"
jbachorik@22897 69 #include "prims/jvmtiThreadState.hpp"
coleenp@15099 70 #include "prims/methodComparator.hpp"
dholmes@40655 71 #include "runtime/atomic.hpp"
coleenp@56724 72 #include "runtime/biasedLocking.hpp"
iklam@51467 73 #include "runtime/fieldDescriptor.inline.hpp"
stefank@7397 74 #include "runtime/handles.inline.hpp"
stefank@7397 75 #include "runtime/javaCalls.hpp"
stefank@7397 76 #include "runtime/mutexLocker.hpp"
coleenp@50429 77 #include "runtime/orderAccess.hpp"
stefank@14583 78 #include "runtime/thread.inline.hpp"
coleenp@17075 79 #include "services/classLoadingService.hpp"
stefank@7397 80 #include "services/threadService.hpp"
stefank@7397 81 #include "utilities/dtrace.hpp"
coleenp@53738 82 #include "utilities/events.hpp"
jprovino@15482 83 #include "utilities/macros.hpp"
acorn@40016 84 #include "utilities/stringUtils.hpp"
stefank@7397 85 #ifdef COMPILER1
stefank@7397 86 #include "c1/c1_Compiler.hpp"
stefank@7397 87 #endif
hseigel@51543 88 #if INCLUDE_JFR
hseigel@51543 89 #include "jfr/jfrEvents.hpp"
hseigel@51543 90 #endif
hseigel@51543 91
duke@1 92
fparain@5089 93 #ifdef DTRACE_ENABLED
fparain@5089 94
dcubed@10739 95
dcubed@10739 96 #define HOTSPOT_CLASS_INITIALIZATION_required HOTSPOT_CLASS_INITIALIZATION_REQUIRED
dcubed@10739 97 #define HOTSPOT_CLASS_INITIALIZATION_recursive HOTSPOT_CLASS_INITIALIZATION_RECURSIVE
dcubed@10739 98 #define HOTSPOT_CLASS_INITIALIZATION_concurrent HOTSPOT_CLASS_INITIALIZATION_CONCURRENT
dcubed@10739 99 #define HOTSPOT_CLASS_INITIALIZATION_erroneous HOTSPOT_CLASS_INITIALIZATION_ERRONEOUS
dcubed@10739 100 #define HOTSPOT_CLASS_INITIALIZATION_super__failed HOTSPOT_CLASS_INITIALIZATION_SUPER_FAILED
dcubed@10739 101 #define HOTSPOT_CLASS_INITIALIZATION_clinit HOTSPOT_CLASS_INITIALIZATION_CLINIT
dcubed@10739 102 #define HOTSPOT_CLASS_INITIALIZATION_error HOTSPOT_CLASS_INITIALIZATION_ERROR
dcubed@10739 103 #define HOTSPOT_CLASS_INITIALIZATION_end HOTSPOT_CLASS_INITIALIZATION_END
hseigel@46341 104 #define DTRACE_CLASSINIT_PROBE(type, thread_type) \
dcubed@10739 105 { \
dcubed@10739 106 char* data = NULL; \
dcubed@10739 107 int len = 0; \
hseigel@46341 108 Symbol* clss_name = name(); \
hseigel@46341 109 if (clss_name != NULL) { \
hseigel@46341 110 data = (char*)clss_name->bytes(); \
hseigel@46341 111 len = clss_name->utf8_length(); \
dcubed@10739 112 } \
dcubed@10739 113 HOTSPOT_CLASS_INITIALIZATION_##type( \
sgehwolf@46766 114 data, len, (void*)class_loader(), thread_type); \
dcubed@10739 115 }
dcubed@10739 116
hseigel@46341 117 #define DTRACE_CLASSINIT_PROBE_WAIT(type, thread_type, wait) \
dcubed@10739 118 { \
dcubed@10739 119 char* data = NULL; \
dcubed@10739 120 int len = 0; \
hseigel@46341 121 Symbol* clss_name = name(); \
hseigel@46341 122 if (clss_name != NULL) { \
hseigel@46341 123 data = (char*)clss_name->bytes(); \
hseigel@46341 124 len = clss_name->utf8_length(); \
dcubed@10739 125 } \
dcubed@10739 126 HOTSPOT_CLASS_INITIALIZATION_##type( \
sgehwolf@46766 127 data, len, (void*)class_loader(), thread_type, wait); \
dcubed@10739 128 }
fparain@5089 129
fparain@5089 130 #else // ndef DTRACE_ENABLED
fparain@5089 131
hseigel@46341 132 #define DTRACE_CLASSINIT_PROBE(type, thread_type)
hseigel@46341 133 #define DTRACE_CLASSINIT_PROBE_WAIT(type, thread_type, wait)
fparain@5089 134
fparain@5089 135 #endif // ndef DTRACE_ENABLED
fparain@5089 136
mgronlun@34666 137 static inline bool is_class_loader(const Symbol* class_name,
mgronlun@34666 138 const ClassFileParser& parser) {
mgronlun@34666 139 assert(class_name != NULL, "invariant");
mgronlun@34666 140
mgronlun@34666 141 if (class_name == vmSymbols::java_lang_ClassLoader()) {
mgronlun@34666 142 return true;
mgronlun@34666 143 }
mgronlun@34666 144
mgronlun@34666 145 if (SystemDictionary::ClassLoader_klass_loaded()) {
mgronlun@34666 146 const Klass* const super_klass = parser.super_klass();
mgronlun@34666 147 if (super_klass != NULL) {
mgronlun@34666 148 if (super_klass->is_subtype_of(SystemDictionary::ClassLoader_klass())) {
mgronlun@34666 149 return true;
mgronlun@34666 150 }
mgronlun@34666 151 }
mgronlun@34666 152 }
mgronlun@34666 153 return false;
mgronlun@34666 154 }
mgronlun@34666 155
dholmes@50735 156 // called to verify that k is a member of this nest
dholmes@50735 157 bool InstanceKlass::has_nest_member(InstanceKlass* k, TRAPS) const {
dholmes@50735 158 if (_nest_members == NULL || _nest_members == Universe::the_empty_short_array()) {
dholmes@50735 159 if (log_is_enabled(Trace, class, nestmates)) {
dholmes@50735 160 ResourceMark rm(THREAD);
dholmes@50735 161 log_trace(class, nestmates)("Checked nest membership of %s in non-nest-host class %s",
dholmes@50735 162 k->external_name(), this->external_name());
dholmes@50735 163 }
dholmes@50735 164 return false;
dholmes@50735 165 }
dholmes@50735 166
dholmes@50735 167 if (log_is_enabled(Trace, class, nestmates)) {
dholmes@50735 168 ResourceMark rm(THREAD);
dholmes@50735 169 log_trace(class, nestmates)("Checking nest membership of %s in %s",
dholmes@50735 170 k->external_name(), this->external_name());
dholmes@50735 171 }
dholmes@50735 172
dholmes@52232 173 // Check for a resolved cp entry , else fall back to a name check.
dholmes@52232 174 // We don't want to resolve any class other than the one being checked.
dholmes@50735 175 for (int i = 0; i < _nest_members->length(); i++) {
dholmes@50735 176 int cp_index = _nest_members->at(i);
dholmes@52232 177 if (_constants->tag_at(cp_index).is_klass()) {
dholmes@50735 178 Klass* k2 = _constants->klass_at(cp_index, CHECK_false);
dholmes@50735 179 if (k2 == k) {
dholmes@52232 180 log_trace(class, nestmates)("- class is listed at nest_members[%d] => cp[%d]", i, cp_index);
dholmes@50735 181 return true;
dholmes@52232 182 }
dholmes@52232 183 }
dholmes@52232 184 else {
dholmes@52232 185 Symbol* name = _constants->klass_name_at(cp_index);
dholmes@52232 186 if (name == k->name()) {
dholmes@52232 187 log_trace(class, nestmates)("- Found it at nest_members[%d] => cp[%d]", i, cp_index);
dholmes@52232 188
dholmes@53864 189 // Names match so check actual klass - this may trigger class loading if
dholmes@53864 190 // it doesn't match (though that should be impossible). But to be safe we
dholmes@53864 191 // have to check for a compiler thread executing here.
dholmes@53864 192 if (!THREAD->can_call_java() && !_constants->tag_at(cp_index).is_klass()) {
dholmes@53864 193 log_trace(class, nestmates)("- validation required resolution in an unsuitable thread");
dholmes@53864 194 return false;
dholmes@53864 195 }
dholmes@53864 196
dholmes@52232 197 Klass* k2 = _constants->klass_at(cp_index, CHECK_false);
dholmes@52232 198 if (k2 == k) {
dholmes@52232 199 log_trace(class, nestmates)("- class is listed as a nest member");
dholmes@52232 200 return true;
dholmes@52232 201 }
dholmes@52232 202 else {
dholmes@52232 203 // same name but different klass!
dholmes@52232 204 log_trace(class, nestmates)(" - klass comparison failed!");
dholmes@52232 205 // can't have two names the same, so we're done
dholmes@52232 206 return false;
dholmes@52232 207 }
dholmes@50735 208 }
dholmes@50735 209 }
dholmes@50735 210 }
dholmes@50735 211 log_trace(class, nestmates)("- class is NOT a nest member!");
dholmes@50735 212 return false;
dholmes@50735 213 }
dholmes@50735 214
dholmes@50735 215 // Return nest-host class, resolving, validating and saving it if needed.
dholmes@50735 216 // In cases where this is called from a thread that can not do classloading
dholmes@50735 217 // (such as a native JIT thread) then we simply return NULL, which in turn
dholmes@50735 218 // causes the access check to return false. Such code will retry the access
dholmes@50735 219 // from a more suitable environment later.
dholmes@50735 220 InstanceKlass* InstanceKlass::nest_host(Symbol* validationException, TRAPS) {
dholmes@50735 221 InstanceKlass* nest_host_k = _nest_host;
dholmes@50735 222 if (nest_host_k == NULL) {
dholmes@50735 223 // need to resolve and save our nest-host class. This could be attempted
dholmes@50735 224 // concurrently but as the result is idempotent and we don't use the class
dholmes@50735 225 // then we do not need any synchronization beyond what is implicitly used
dholmes@50735 226 // during class loading.
dholmes@50735 227 if (_nest_host_index != 0) { // we have a real nest_host
dholmes@50735 228 // Before trying to resolve check if we're in a suitable context
dholmes@50735 229 if (!THREAD->can_call_java() && !_constants->tag_at(_nest_host_index).is_klass()) {
dholmes@50735 230 if (log_is_enabled(Trace, class, nestmates)) {
dholmes@50735 231 ResourceMark rm(THREAD);
dholmes@50735 232 log_trace(class, nestmates)("Rejected resolution of nest-host of %s in unsuitable thread",
dholmes@50735 233 this->external_name());
dholmes@50735 234 }
dholmes@50735 235 return NULL;
dholmes@50735 236 }
dholmes@50735 237
dholmes@50735 238 if (log_is_enabled(Trace, class, nestmates)) {
dholmes@50735 239 ResourceMark rm(THREAD);
dholmes@50735 240 log_trace(class, nestmates)("Resolving nest-host of %s using cp entry for %s",
dholmes@50735 241 this->external_name(),
dholmes@50735 242 _constants->klass_name_at(_nest_host_index)->as_C_string());
dholmes@50735 243 }
dholmes@50735 244
dholmes@50735 245 Klass* k = _constants->klass_at(_nest_host_index, THREAD);
dholmes@50735 246 if (HAS_PENDING_EXCEPTION) {
dholmes@50735 247 Handle exc_h = Handle(THREAD, PENDING_EXCEPTION);
dholmes@50735 248 if (exc_h->is_a(SystemDictionary::NoClassDefFoundError_klass())) {
dholmes@50735 249 // throw a new CDNFE with the original as its cause, and a clear msg
dholmes@50735 250 ResourceMark rm(THREAD);
dholmes@50735 251 char buf[200];
dholmes@50735 252 CLEAR_PENDING_EXCEPTION;
dholmes@50735 253 jio_snprintf(buf, sizeof(buf),
dholmes@50735 254 "Unable to load nest-host class (%s) of %s",
dholmes@50735 255 _constants->klass_name_at(_nest_host_index)->as_C_string(),
dholmes@50735 256 this->external_name());
dholmes@50735 257 log_trace(class, nestmates)("%s - NoClassDefFoundError", buf);
dholmes@50735 258 THROW_MSG_CAUSE_NULL(vmSymbols::java_lang_NoClassDefFoundError(), buf, exc_h);
dholmes@50735 259 }
dholmes@50735 260 // All other exceptions pass through (OOME, StackOverflowError, LinkageErrors etc).
dholmes@50735 261 return NULL;
dholmes@50735 262 }
dholmes@50735 263
dholmes@50735 264 // A valid nest-host is an instance class in the current package that lists this
dholmes@50735 265 // class as a nest member. If any of these conditions are not met we post the
dholmes@50735 266 // requested exception type (if any) and return NULL
dholmes@50735 267
dholmes@50735 268 const char* error = NULL;
dholmes@50735 269
dholmes@50735 270 // JVMS 5.4.4 indicates package check comes first
dholmes@50735 271 if (is_same_class_package(k)) {
dholmes@50735 272
dholmes@50735 273 // Now check actual membership. We can't be a member if our "host" is
dholmes@50735 274 // not an instance class.
dholmes@50735 275 if (k->is_instance_klass()) {
dholmes@50735 276 nest_host_k = InstanceKlass::cast(k);
dholmes@50735 277
dholmes@50735 278 bool is_member = nest_host_k->has_nest_member(this, CHECK_NULL);
dholmes@50735 279 if (is_member) {
dholmes@50735 280 // save resolved nest-host value
dholmes@50735 281 _nest_host = nest_host_k;
dholmes@50735 282
dholmes@50735 283 if (log_is_enabled(Trace, class, nestmates)) {
dholmes@50735 284 ResourceMark rm(THREAD);
dholmes@50735 285 log_trace(class, nestmates)("Resolved nest-host of %s to %s",
dholmes@50735 286 this->external_name(), k->external_name());
dholmes@50735 287 }
dholmes@50735 288 return nest_host_k;
dholmes@50735 289 }
dholmes@50735 290 }
dholmes@50735 291 error = "current type is not listed as a nest member";
dholmes@50735 292 } else {
dholmes@50735 293 error = "types are in different packages";
dholmes@50735 294 }
dholmes@50735 295
dholmes@50735 296 if (log_is_enabled(Trace, class, nestmates)) {
dholmes@50735 297 ResourceMark rm(THREAD);
dholmes@52706 298 log_trace(class, nestmates)
dholmes@52706 299 ("Type %s (loader: %s) is not a nest member of "
dholmes@52706 300 "resolved type %s (loader: %s): %s",
dholmes@52706 301 this->external_name(),
dholmes@52706 302 this->class_loader_data()->loader_name_and_id(),
dholmes@52706 303 k->external_name(),
dholmes@52706 304 k->class_loader_data()->loader_name_and_id(),
dholmes@52706 305 error);
dholmes@50735 306 }
dholmes@50735 307
dholmes@53864 308 if (validationException != NULL && THREAD->can_call_java()) {
dholmes@50735 309 ResourceMark rm(THREAD);
dholmes@50735 310 Exceptions::fthrow(THREAD_AND_LOCATION,
dholmes@50735 311 validationException,
dholmes@52706 312 "Type %s (loader: %s) is not a nest member of %s (loader: %s): %s",
dholmes@50735 313 this->external_name(),
dholmes@52706 314 this->class_loader_data()->loader_name_and_id(),
dholmes@50735 315 k->external_name(),
dholmes@52706 316 k->class_loader_data()->loader_name_and_id(),
dholmes@50735 317 error
dholmes@50735 318 );
dholmes@50735 319 }
dholmes@50735 320 return NULL;
dholmes@50735 321 } else {
dholmes@50735 322 if (log_is_enabled(Trace, class, nestmates)) {
dholmes@50735 323 ResourceMark rm(THREAD);
dholmes@50735 324 log_trace(class, nestmates)("Type %s is not part of a nest: setting nest-host to self",
dholmes@50735 325 this->external_name());
dholmes@50735 326 }
dholmes@50735 327 // save resolved nest-host value
dholmes@50735 328 return (_nest_host = this);
dholmes@50735 329 }
dholmes@50735 330 }
dholmes@50735 331 return nest_host_k;
dholmes@50735 332 }
dholmes@50735 333
dholmes@50735 334 // check if 'this' and k are nestmates (same nest_host), or k is our nest_host,
dholmes@50735 335 // or we are k's nest_host - all of which is covered by comparing the two
dholmes@50735 336 // resolved_nest_hosts
dholmes@50735 337 bool InstanceKlass::has_nestmate_access_to(InstanceKlass* k, TRAPS) {
dholmes@50735 338
dholmes@50735 339 assert(this != k, "this should be handled by higher-level code");
dholmes@50735 340
dholmes@50735 341 // Per JVMS 5.4.4 we first resolve and validate the current class, then
dholmes@50735 342 // the target class k. Resolution exceptions will be passed on by upper
dholmes@50735 343 // layers. IncompatibleClassChangeErrors from membership validation failures
dholmes@50735 344 // will also be passed through.
dholmes@50735 345
dholmes@50735 346 Symbol* icce = vmSymbols::java_lang_IncompatibleClassChangeError();
dholmes@50735 347 InstanceKlass* cur_host = nest_host(icce, CHECK_false);
dholmes@50735 348 if (cur_host == NULL) {
dholmes@50735 349 return false;
dholmes@50735 350 }
dholmes@50735 351
dholmes@50735 352 Klass* k_nest_host = k->nest_host(icce, CHECK_false);
dholmes@50735 353 if (k_nest_host == NULL) {
dholmes@50735 354 return false;
dholmes@50735 355 }
dholmes@50735 356
dholmes@50735 357 bool access = (cur_host == k_nest_host);
dholmes@50735 358
dholmes@50735 359 if (log_is_enabled(Trace, class, nestmates)) {
dholmes@50735 360 ResourceMark rm(THREAD);
dholmes@50735 361 log_trace(class, nestmates)("Class %s does %shave nestmate access to %s",
dholmes@50735 362 this->external_name(),
dholmes@50735 363 access ? "" : "NOT ",
dholmes@50735 364 k->external_name());
dholmes@50735 365 }
dholmes@50735 366
dholmes@50735 367 return access;
dholmes@50735 368 }
dholmes@50735 369
mgronlun@34666 370 InstanceKlass* InstanceKlass::allocate_instance_klass(const ClassFileParser& parser, TRAPS) {
mgronlun@34666 371 const int size = InstanceKlass::size(parser.vtable_size(),
mgronlun@34666 372 parser.itable_size(),
mgronlun@34666 373 nonstatic_oop_map_size(parser.total_oop_map_count()),
mgronlun@34666 374 parser.is_interface(),
lfoltan@51444 375 parser.is_unsafe_anonymous(),
lfoltan@51444 376 should_store_fingerprint(parser.is_unsafe_anonymous()));
mgronlun@34666 377
mgronlun@34666 378 const Symbol* const class_name = parser.class_name();
mgronlun@34666 379 assert(class_name != NULL, "invariant");
mgronlun@34666 380 ClassLoaderData* loader_data = parser.loader_data();
mgronlun@34666 381 assert(loader_data != NULL, "invariant");
mgronlun@34666 382
mgronlun@34666 383 InstanceKlass* ik;
coleenp@13728 384
coleenp@13728 385 // Allocation
mgronlun@34666 386 if (REF_NONE == parser.reference_type()) {
mgronlun@34666 387 if (class_name == vmSymbols::java_lang_Class()) {
mgronlun@34666 388 // mirror
mgronlun@34666 389 ik = new (loader_data, size, THREAD) InstanceMirrorKlass(parser);
mgronlun@34666 390 }
mgronlun@34666 391 else if (is_class_loader(class_name, parser)) {
mgronlun@34666 392 // class loader
mgronlun@34666 393 ik = new (loader_data, size, THREAD) InstanceClassLoaderKlass(parser);
dholmes@50735 394 } else {
mgronlun@34666 395 // normal
mgronlun@34666 396 ik = new (loader_data, size, THREAD) InstanceKlass(parser, InstanceKlass::_misc_kind_other);
mgronlun@34666 397 }
dholmes@50735 398 } else {
mgronlun@34666 399 // reference
mgronlun@34666 400 ik = new (loader_data, size, THREAD) InstanceRefKlass(parser);
coleenp@13728 401 }
coleenp@13728 402
coleenp@15935 403 // Check for pending exception before adding to the loader data and incrementing
coleenp@15935 404 // class count. Can get OOM here.
coleenp@15935 405 if (HAS_PENDING_EXCEPTION) {
coleenp@15935 406 return NULL;
coleenp@15935 407 }
coleenp@15935 408
coleenp@13728 409 return ik;
coleenp@13728 410 }
coleenp@13728 411
coleenp@15935 412
coleenp@15935 413 // copy method ordering from resource area to Metaspace
mgronlun@34666 414 void InstanceKlass::copy_method_ordering(const intArray* m, TRAPS) {
coleenp@15935 415 if (m != NULL) {
coleenp@15935 416 // allocate a new array and copy contents (memcpy?)
coleenp@15935 417 _method_ordering = MetadataFactory::new_array<int>(class_loader_data(), m->length(), CHECK);
coleenp@15935 418 for (int i = 0; i < m->length(); i++) {
coleenp@15935 419 _method_ordering->at_put(i, m->at(i));
coleenp@15935 420 }
coleenp@15935 421 } else {
coleenp@15935 422 _method_ordering = Universe::the_empty_int_array();
coleenp@15935 423 }
coleenp@15935 424 }
coleenp@15935 425
acorn@20391 426 // create a new array of vtable_indices for default methods
acorn@20391 427 Array<int>* InstanceKlass::create_new_default_vtable_indices(int len, TRAPS) {
acorn@20391 428 Array<int>* vtable_indices = MetadataFactory::new_array<int>(class_loader_data(), len, CHECK_NULL);
acorn@20391 429 assert(default_vtable_indices() == NULL, "only create once");
acorn@20391 430 set_default_vtable_indices(vtable_indices);
acorn@20391 431 return vtable_indices;
acorn@20391 432 }
coleenp@15935 433
stefank@50752 434 InstanceKlass::InstanceKlass(const ClassFileParser& parser, unsigned kind, KlassID id) :
stefank@50752 435 Klass(id),
tschatzl@51334 436 _nest_members(NULL),
tschatzl@51334 437 _nest_host_index(0),
tschatzl@51334 438 _nest_host(NULL),
vromero@57233 439 _record_components(NULL),
mgronlun@34666 440 _static_field_size(parser.static_field_size()),
mgronlun@34666 441 _nonstatic_oop_map_size(nonstatic_oop_map_size(parser.total_oop_map_count())),
mgronlun@34666 442 _itable_len(parser.itable_size()),
vlivanov@55254 443 _init_thread(NULL),
vlivanov@55254 444 _init_state(allocated),
iklam@52514 445 _reference_type(parser.reference_type())
iklam@52514 446 {
iklam@52514 447 set_vtable_length(parser.vtable_size());
iklam@52514 448 set_kind(kind);
iklam@52514 449 set_access_flags(parser.access_flags());
iklam@52514 450 set_is_unsafe_anonymous(parser.is_unsafe_anonymous());
iklam@52514 451 set_layout_helper(Klass::instance_layout_helper(parser.layout_size(),
mgronlun@34666 452 false));
mgronlun@34666 453
iklam@52514 454 assert(NULL == _methods, "underlying memory not zeroed?");
iklam@52514 455 assert(is_instance_klass(), "is layout incorrect?");
iklam@52514 456 assert(size_helper() == parser.layout_size(), "incorrect size_helper?");
iklam@52514 457
ccheung@56468 458 if (Arguments::is_dumping_archive()) {
iklam@52514 459 SystemDictionaryShared::init_dumptime_info(this);
iklam@52514 460 }
coleenp@56724 461
coleenp@56724 462 // Set biased locking bit for all instances of this class; it will be
coleenp@56724 463 // cleared if revocation occurs too often for this type
coleenp@56724 464 if (UseBiasedLocking && BiasedLocking::enabled()) {
coleenp@56724 465 set_prototype_header(markWord::biased_locking_prototype());
coleenp@56724 466 }
coleenp@13728 467 }
coleenp@13728 468
coleenp@15935 469 void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data,
coleenp@15935 470 Array<Method*>* methods) {
hseigel@20684 471 if (methods != NULL && methods != Universe::the_empty_method_array() &&
hseigel@20684 472 !methods->is_shared()) {
coleenp@15935 473 for (int i = 0; i < methods->length(); i++) {
coleenp@15935 474 Method* method = methods->at(i);
coleenp@15935 475 if (method == NULL) continue; // maybe null if error processing
coleenp@15935 476 // Only want to delete methods that are not executing for RedefineClasses.
coleenp@15935 477 // The previous version will point to them so they're not totally dangling
coleenp@15935 478 assert (!method->on_stack(), "shouldn't be called with methods on stack");
coleenp@15935 479 MetadataFactory::free_metadata(loader_data, method);
coleenp@15935 480 }
coleenp@15935 481 MetadataFactory::free_array<Method*>(loader_data, methods);
coleenp@15935 482 }
coleenp@15935 483 }
coleenp@15935 484
coleenp@15935 485 void InstanceKlass::deallocate_interfaces(ClassLoaderData* loader_data,
mgronlun@34666 486 const Klass* super_klass,
iklam@51329 487 Array<InstanceKlass*>* local_interfaces,
iklam@51329 488 Array<InstanceKlass*>* transitive_interfaces) {
coleenp@15935 489 // Only deallocate transitive interfaces if not empty, same as super class
coleenp@15935 490 // or same as local interfaces. See code in parseClassFile.
iklam@51329 491 Array<InstanceKlass*>* ti = transitive_interfaces;
iklam@51329 492 if (ti != Universe::the_empty_instance_klass_array() && ti != local_interfaces) {
coleenp@15935 493 // check that the interfaces don't come from super class
iklam@51329 494 Array<InstanceKlass*>* sti = (super_klass == NULL) ? NULL :
coleenp@15935 495 InstanceKlass::cast(super_klass)->transitive_interfaces();
hseigel@20684 496 if (ti != sti && ti != NULL && !ti->is_shared()) {
iklam@51329 497 MetadataFactory::free_array<InstanceKlass*>(loader_data, ti);
coleenp@15935 498 }
coleenp@15935 499 }
coleenp@15935 500
coleenp@15935 501 // local interfaces can be empty
iklam@51329 502 if (local_interfaces != Universe::the_empty_instance_klass_array() &&
hseigel@20684 503 local_interfaces != NULL && !local_interfaces->is_shared()) {
iklam@51329 504 MetadataFactory::free_array<InstanceKlass*>(loader_data, local_interfaces);
coleenp@15935 505 }
coleenp@15935 506 }
coleenp@15935 507
vromero@57233 508 void InstanceKlass::deallocate_record_components(ClassLoaderData* loader_data,
vromero@57233 509 Array<RecordComponent*>* record_components) {
vromero@57233 510 if (record_components != NULL && !record_components->is_shared()) {
vromero@57233 511 for (int i = 0; i < record_components->length(); i++) {
vromero@57233 512 RecordComponent* record_component = record_components->at(i);
vromero@57233 513 MetadataFactory::free_metadata(loader_data, record_component);
vromero@57233 514 }
vromero@57233 515 MetadataFactory::free_array<RecordComponent*>(loader_data, record_components);
vromero@57233 516 }
vromero@57233 517 }
vromero@57233 518
coleenp@13728 519 // This function deallocates the metadata and C heap pointers that the
coleenp@13728 520 // InstanceKlass points to.
coleenp@13728 521 void InstanceKlass::deallocate_contents(ClassLoaderData* loader_data) {
coleenp@13728 522
coleenp@13728 523 // Orphan the mirror first, CMS thinks it's still live.
coleenp@15935 524 if (java_mirror() != NULL) {
coleenp@15935 525 java_lang_Class::set_klass(java_mirror(), NULL);
coleenp@15935 526 }
coleenp@13728 527
coleenp@47580 528 // Also remove mirror from handles
coleenp@47580 529 loader_data->remove_handle(_java_mirror);
coleenp@47580 530
coleenp@13728 531 // Need to take this class off the class loader data list.
coleenp@13728 532 loader_data->remove_class(this);
coleenp@13728 533
coleenp@13728 534 // The array_klass for this class is created later, after error handling.
coleenp@13728 535 // For class redefinition, we keep the original class so this scratch class
coleenp@13728 536 // doesn't have an array class. Either way, assert that there is nothing
coleenp@13728 537 // to deallocate.
coleenp@13728 538 assert(array_klasses() == NULL, "array classes shouldn't be created for this class yet");
coleenp@13728 539
coleenp@13728 540 // Release C heap allocated data that this might point to, which includes
coleenp@13728 541 // reference counting symbol names.
coleenp@13728 542 release_C_heap_structures();
coleenp@13728 543
coleenp@15935 544 deallocate_methods(loader_data, methods());
coleenp@13728 545 set_methods(NULL);
coleenp@13728 546
vromero@57233 547 deallocate_record_components(loader_data, record_components());
vromero@57233 548 set_record_components(NULL);
vromero@57233 549
hseigel@20684 550 if (method_ordering() != NULL &&
hseigel@20684 551 method_ordering() != Universe::the_empty_int_array() &&
hseigel@20684 552 !method_ordering()->is_shared()) {
coleenp@13728 553 MetadataFactory::free_array<int>(loader_data, method_ordering());
coleenp@13728 554 }
coleenp@13728 555 set_method_ordering(NULL);
coleenp@13728 556
acorn@20391 557 // default methods can be empty
acorn@20391 558 if (default_methods() != NULL &&
hseigel@20684 559 default_methods() != Universe::the_empty_method_array() &&
hseigel@20684 560 !default_methods()->is_shared()) {
acorn@20391 561 MetadataFactory::free_array<Method*>(loader_data, default_methods());
acorn@20391 562 }
acorn@20391 563 // Do NOT deallocate the default methods, they are owned by superinterfaces.
acorn@20391 564 set_default_methods(NULL);
acorn@20391 565
acorn@20391 566 // default methods vtable indices can be empty
hseigel@20684 567 if (default_vtable_indices() != NULL &&
hseigel@20684 568 !default_vtable_indices()->is_shared()) {
acorn@20391 569 MetadataFactory::free_array<int>(loader_data, default_vtable_indices());
acorn@20391 570 }
acorn@20391 571 set_default_vtable_indices(NULL);
acorn@20391 572
acorn@20391 573
coleenp@13728 574 // This array is in Klass, but remove it with the InstanceKlass since
coleenp@13728 575 // this place would be the only caller and it can share memory with transitive
coleenp@13728 576 // interfaces.
hseigel@20684 577 if (secondary_supers() != NULL &&
hseigel@20684 578 secondary_supers() != Universe::the_empty_klass_array() &&
iklam@51329 579 // see comments in compute_secondary_supers about the following cast
iklam@51329 580 (address)(secondary_supers()) != (address)(transitive_interfaces()) &&
hseigel@20684 581 !secondary_supers()->is_shared()) {
coleenp@13728 582 MetadataFactory::free_array<Klass*>(loader_data, secondary_supers());
coleenp@13728 583 }
coleenp@13728 584 set_secondary_supers(NULL);
coleenp@13728 585
coleenp@15935 586 deallocate_interfaces(loader_data, super(), local_interfaces(), transitive_interfaces());
coleenp@13728 587 set_transitive_interfaces(NULL);
coleenp@13728 588 set_local_interfaces(NULL);
coleenp@13728 589
hseigel@20684 590 if (fields() != NULL && !fields()->is_shared()) {
hseigel@20684 591 MetadataFactory::free_array<jushort>(loader_data, fields());
hseigel@20684 592 }
coleenp@13728 593 set_fields(NULL, 0);
coleenp@13728 594
coleenp@13728 595 // If a method from a redefined class is using this constant pool, don't
coleenp@13728 596 // delete it, yet. The new class's previous version will point to this.
coleenp@15935 597 if (constants() != NULL) {
coleenp@15935 598 assert (!constants()->on_stack(), "shouldn't be called if anything is onstack");
hseigel@20684 599 if (!constants()->is_shared()) {
hseigel@20684 600 MetadataFactory::free_metadata(loader_data, constants());
hseigel@20684 601 }
aeriksso@31353 602 // Delete any cached resolution errors for the constant pool
aeriksso@31353 603 SystemDictionary::delete_resolution_error(constants());
aeriksso@31353 604
coleenp@15935 605 set_constants(NULL);
coleenp@15935 606 }
coleenp@13728 607
hseigel@20684 608 if (inner_classes() != NULL &&
hseigel@20684 609 inner_classes() != Universe::the_empty_short_array() &&
hseigel@20684 610 !inner_classes()->is_shared()) {
coleenp@13728 611 MetadataFactory::free_array<jushort>(loader_data, inner_classes());
coleenp@13728 612 }
coleenp@13728 613 set_inner_classes(NULL);
coleenp@13728 614
dholmes@50735 615 if (nest_members() != NULL &&
dholmes@50735 616 nest_members() != Universe::the_empty_short_array() &&
dholmes@50735 617 !nest_members()->is_shared()) {
dholmes@50735 618 MetadataFactory::free_array<jushort>(loader_data, nest_members());
dholmes@50735 619 }
dholmes@50735 620 set_nest_members(NULL);
dholmes@50735 621
hseigel@20684 622 // We should deallocate the Annotations instance if it's not in shared spaces.
hseigel@20684 623 if (annotations() != NULL && !annotations()->is_shared()) {
hseigel@20684 624 MetadataFactory::free_metadata(loader_data, annotations());
hseigel@20684 625 }
coleenp@13728 626 set_annotations(NULL);
iklam@52514 627
ccheung@56468 628 if (Arguments::is_dumping_archive()) {
iklam@52514 629 SystemDictionaryShared::remove_dumptime_info(this);
iklam@52514 630 }
coleenp@13728 631 }
coleenp@13728 632
coleenp@13728 633 bool InstanceKlass::should_be_initialized() const {
duke@1 634 return !is_initialized();
duke@1 635 }
duke@1 636
iklam@46408 637 klassItable InstanceKlass::itable() const {
iklam@46408 638 return klassItable(const_cast<InstanceKlass*>(this));
duke@1 639 }
duke@1 640
coleenp@13728 641 void InstanceKlass::eager_initialize(Thread *thread) {
duke@1 642 if (!EagerInitialization) return;
duke@1 643
duke@1 644 if (this->is_not_initialized()) {
duke@1 645 // abort if the the class has a class initializer
duke@1 646 if (this->class_initializer() != NULL) return;
duke@1 647
duke@1 648 // abort if it is java.lang.Object (initialization is handled in genesis)
hseigel@46341 649 Klass* super_klass = super();
hseigel@46341 650 if (super_klass == NULL) return;
duke@1 651
duke@1 652 // abort if the super class should be initialized
hseigel@46341 653 if (!InstanceKlass::cast(super_klass)->is_initialized()) return;
duke@1 654
duke@1 655 // call body to expose the this pointer
hseigel@46341 656 eager_initialize_impl();
duke@1 657 }
duke@1 658 }
duke@1 659
coleenp@17826 660 // JVMTI spec thinks there are signers and protection domain in the
coleenp@17826 661 // instanceKlass. These accessors pretend these fields are there.
coleenp@17826 662 // The hprof specification also thinks these fields are in InstanceKlass.
coleenp@17826 663 oop InstanceKlass::protection_domain() const {
coleenp@17826 664 // return the protection_domain from the mirror
coleenp@17826 665 return java_lang_Class::protection_domain(java_mirror());
coleenp@17826 666 }
coleenp@17826 667
coleenp@17826 668 // To remove these from requires an incompatible change and CCC request.
coleenp@17826 669 objArrayOop InstanceKlass::signers() const {
coleenp@17826 670 // return the signers from the mirror
coleenp@17826 671 return java_lang_Class::signers(java_mirror());
coleenp@17826 672 }
coleenp@17826 673
coleenp@20379 674 oop InstanceKlass::init_lock() const {
coleenp@17826 675 // return the init lock from the mirror
iklam@21079 676 oop lock = java_lang_Class::init_lock(java_mirror());
dholmes@26556 677 // Prevent reordering with any access of initialization state
dholmes@26556 678 OrderAccess::loadload();
iklam@21079 679 assert((oop)lock != NULL || !is_not_initialized(), // initialized or in_error state
iklam@21079 680 "only fully initialized state can have a null lock");
iklam@21079 681 return lock;
iklam@21079 682 }
iklam@21079 683
iklam@21079 684 // Set the initialization lock to null so the object can be GC'ed. Any racing
iklam@21079 685 // threads to get this lock will see a null lock and will not lock.
iklam@21079 686 // That's okay because they all check for initialized state after getting
iklam@21079 687 // the lock and return.
iklam@21079 688 void InstanceKlass::fence_and_clear_init_lock() {
iklam@21079 689 // make sure previous stores are all done, notably the init_state.
iklam@21079 690 OrderAccess::storestore();
iklam@21079 691 java_lang_Class::set_init_lock(java_mirror(), NULL);
iklam@21079 692 assert(!is_not_initialized(), "class must be initialized now");
coleenp@17826 693 }
duke@1 694
hseigel@46341 695 void InstanceKlass::eager_initialize_impl() {
duke@1 696 EXCEPTION_MARK;
coleenp@46271 697 HandleMark hm(THREAD);
hseigel@46341 698 Handle h_init_lock(THREAD, init_lock());
hseigel@46562 699 ObjectLocker ol(h_init_lock, THREAD, h_init_lock() != NULL);
duke@1 700
duke@1 701 // abort if someone beat us to the initialization
hseigel@46341 702 if (!is_not_initialized()) return; // note: not equivalent to is_initialized()
hseigel@46341 703
hseigel@46341 704 ClassState old_state = init_state();
hseigel@51697 705 link_class_impl(THREAD);
duke@1 706 if (HAS_PENDING_EXCEPTION) {
duke@1 707 CLEAR_PENDING_EXCEPTION;
duke@1 708 // Abort if linking the class throws an exception.
duke@1 709
duke@1 710 // Use a test to avoid redundantly resetting the state if there's
duke@1 711 // no change. Set_init_state() asserts that state changes make
duke@1 712 // progress, whereas here we might just be spinning in place.
hseigel@46341 713 if (old_state != _init_state)
hseigel@46341 714 set_init_state(old_state);
duke@1 715 } else {
duke@1 716 // linking successfull, mark class as initialized
hseigel@46341 717 set_init_state(fully_initialized);
hseigel@46341 718 fence_and_clear_init_lock();
duke@1 719 // trace
mockner@38151 720 if (log_is_enabled(Info, class, init)) {
duke@1 721 ResourceMark rm(THREAD);
hseigel@46341 722 log_info(class, init)("[Initialized %s without side effects]", external_name());
duke@1 723 }
duke@1 724 }
duke@1 725 }
duke@1 726
duke@1 727
duke@1 728 // See "The Virtual Machine Specification" section 2.16.5 for a detailed explanation of the class initialization
duke@1 729 // process. The step comments refers to the procedure described in that section.
duke@1 730 // Note: implementation moved to static method to expose the this pointer.
coleenp@13728 731 void InstanceKlass::initialize(TRAPS) {
duke@1 732 if (this->should_be_initialized()) {
hseigel@46341 733 initialize_impl(CHECK);
duke@1 734 // Note: at this point the class may be initialized
duke@1 735 // OR it may be in the state of being initialized
duke@1 736 // in case of recursive initialization!
duke@1 737 } else {
duke@1 738 assert(is_initialized(), "sanity check");
duke@1 739 }
duke@1 740 }
duke@1 741
duke@1 742
hseigel@51697 743 bool InstanceKlass::verify_code(TRAPS) {
duke@1 744 // 1) Verify the bytecodes
hseigel@51697 745 return Verifier::verify(this, should_verify_class(), THREAD);
duke@1 746 }
duke@1 747
coleenp@13728 748 void InstanceKlass::link_class(TRAPS) {
duke@1 749 assert(is_loaded(), "must be loaded");
duke@1 750 if (!is_linked()) {
hseigel@51697 751 link_class_impl(CHECK);
duke@1 752 }
duke@1 753 }
duke@1 754
duke@1 755 // Called to verify that a class can link during initialization, without
duke@1 756 // throwing a VerifyError.
coleenp@13728 757 bool InstanceKlass::link_class_or_fail(TRAPS) {
duke@1 758 assert(is_loaded(), "must be loaded");
duke@1 759 if (!is_linked()) {
hseigel@51697 760 link_class_impl(CHECK_false);
duke@1 761 }
duke@1 762 return is_linked();
duke@1 763 }
duke@1 764
hseigel@51697 765 bool InstanceKlass::link_class_impl(TRAPS) {
ccheung@58266 766 if (DumpSharedSpaces && SystemDictionaryShared::has_class_failed_verification(this)) {
iklam@42031 767 // This is for CDS dumping phase only -- we use the in_error_state to indicate that
iklam@42031 768 // the class has failed verification. Throwing the NoClassDefFoundError here is just
iklam@42031 769 // a convenient way to stop repeat attempts to verify the same (bad) class.
iklam@42031 770 //
iklam@42031 771 // Note that the NoClassDefFoundError is not part of the JLS, and should not be thrown
iklam@42031 772 // if we are executing Java code. This is not a problem for CDS dumping phase since
iklam@42031 773 // it doesn't execute any Java code.
duke@1 774 ResourceMark rm(THREAD);
hseigel@46431 775 Exceptions::fthrow(THREAD_AND_LOCATION,
hseigel@46431 776 vmSymbols::java_lang_NoClassDefFoundError(),
hseigel@46431 777 "Class %s, or one of its supertypes, failed class initialization",
hseigel@46431 778 external_name());
hseigel@46431 779 return false;
duke@1 780 }
duke@1 781 // return if already verified
hseigel@46341 782 if (is_linked()) {
duke@1 783 return true;
duke@1 784 }
duke@1 785
duke@1 786 // Timing
duke@1 787 // timer handles recursion
duke@1 788 assert(THREAD->is_Java_thread(), "non-JavaThread in link_class_impl");
duke@1 789 JavaThread* jt = (JavaThread*)THREAD;
duke@1 790
duke@1 791 // link super class before linking this class
hseigel@46341 792 Klass* super_klass = super();
hseigel@46341 793 if (super_klass != NULL) {
hseigel@46341 794 if (super_klass->is_interface()) { // check if super class is an interface
duke@1 795 ResourceMark rm(THREAD);
duke@1 796 Exceptions::fthrow(
duke@1 797 THREAD_AND_LOCATION,
coleenp@8076 798 vmSymbols::java_lang_IncompatibleClassChangeError(),
duke@1 799 "class %s has interface %s as super class",
hseigel@46341 800 external_name(),
hseigel@46341 801 super_klass->external_name()
duke@1 802 );
duke@1 803 return false;
duke@1 804 }
duke@1 805
hseigel@46341 806 InstanceKlass* ik_super = InstanceKlass::cast(super_klass);
hseigel@51697 807 ik_super->link_class_impl(CHECK_false);
duke@1 808 }
duke@1 809
duke@1 810 // link all interfaces implemented by this class before linking this class
iklam@51329 811 Array<InstanceKlass*>* interfaces = local_interfaces();
duke@1 812 int num_interfaces = interfaces->length();
duke@1 813 for (int index = 0; index < num_interfaces; index++) {
iklam@51329 814 InstanceKlass* interk = interfaces->at(index);
hseigel@51697 815 interk->link_class_impl(CHECK_false);
duke@1 816 }
duke@1 817
duke@1 818 // in case the class is linked in the process of linking its superclasses
hseigel@46341 819 if (is_linked()) {
duke@1 820 return true;
duke@1 821 }
duke@1 822
mchung@3575 823 // trace only the link time for this klass that includes
mchung@3575 824 // the verification time
mchung@3575 825 PerfClassTraceTime vmtimer(ClassLoader::perf_class_link_time(),
mchung@3575 826 ClassLoader::perf_class_link_selftime(),
mchung@3575 827 ClassLoader::perf_classes_linked(),
mchung@3575 828 jt->get_thread_stat()->perf_recursion_counts_addr(),
mchung@3575 829 jt->get_thread_stat()->perf_timers_addr(),
mchung@3575 830 PerfClassTraceTime::CLASS_LINK);
mchung@3575 831
duke@1 832 // verification & rewriting
duke@1 833 {
coleenp@46271 834 HandleMark hm(THREAD);
hseigel@46341 835 Handle h_init_lock(THREAD, init_lock());
hseigel@46562 836 ObjectLocker ol(h_init_lock, THREAD, h_init_lock() != NULL);
duke@1 837 // rewritten will have been set if loader constraint error found
duke@1 838 // on an earlier link attempt
duke@1 839 // don't verify or rewrite if already rewritten
coleenp@46271 840 //
coleenp@13728 841
hseigel@46341 842 if (!is_linked()) {
hseigel@46341 843 if (!is_rewritten()) {
duke@1 844 {
hseigel@51697 845 bool verify_ok = verify_code(THREAD);
duke@1 846 if (!verify_ok) {
duke@1 847 return false;
duke@1 848 }
duke@1 849 }
duke@1 850
duke@1 851 // Just in case a side-effect of verify linked this class already
duke@1 852 // (which can sometimes happen since the verifier loads classes
duke@1 853 // using custom class loaders, which are free to initialize things)
hseigel@46341 854 if (is_linked()) {
duke@1 855 return true;
duke@1 856 }
duke@1 857
duke@1 858 // also sets rewritten
hseigel@46341 859 rewrite_class(CHECK_false);
hseigel@46341 860 } else if (is_shared()) {
hseigel@46341 861 SystemDictionaryShared::check_verification_constraints(this, CHECK_false);
duke@1 862 }
duke@1 863
coleenp@9971 864 // relocate jsrs and link methods after they are all rewritten
hseigel@46341 865 link_methods(CHECK_false);
coleenp@9971 866
duke@1 867 // Initialize the vtable and interface table after
duke@1 868 // methods have been rewritten since rewrite may
coleenp@13728 869 // fabricate new Method*s.
duke@1 870 // also does loader constraint checking
jiangli@39714 871 //
jiangli@39714 872 // initialize_vtable and initialize_itable need to be rerun for
jiangli@39714 873 // a shared class if the class is not loaded by the NULL classloader.
hseigel@46341 874 ClassLoaderData * loader_data = class_loader_data();
hseigel@46341 875 if (!(is_shared() &&
jiangli@39714 876 loader_data->is_the_null_class_loader_data())) {
iklam@46408 877 vtable().initialize_vtable(true, CHECK_false);
iklam@46408 878 itable().initialize_itable(true, CHECK_false);
duke@1 879 }
duke@1 880 #ifdef ASSERT
duke@1 881 else {
iklam@46408 882 vtable().verify(tty, true);
duke@1 883 // In case itable verification is ever added.
iklam@46408 884 // itable().verify(tty, true);
duke@1 885 }
duke@1 886 #endif
hseigel@46341 887 set_init_state(linked);
duke@1 888 if (JvmtiExport::should_post_class_prepare()) {
duke@1 889 Thread *thread = THREAD;
duke@1 890 assert(thread->is_Java_thread(), "thread->is_Java_thread()");
hseigel@46341 891 JvmtiExport::post_class_prepare((JavaThread *) thread, this);
duke@1 892 }
duke@1 893 }
duke@1 894 }
duke@1 895 return true;
duke@1 896 }
duke@1 897
duke@1 898 // Rewrite the byte codes of all of the methods of a class.
duke@1 899 // The rewriter must be called exactly once. Rewriting must happen after
duke@1 900 // verification but before the first method of the class is executed.
coleenp@13728 901 void InstanceKlass::rewrite_class(TRAPS) {
duke@1 902 assert(is_loaded(), "must be loaded");
coleenp@46329 903 if (is_rewritten()) {
coleenp@46329 904 assert(is_shared(), "rewriting an unshared class?");
duke@1 905 return;
duke@1 906 }
coleenp@46329 907 Rewriter::rewrite(this, CHECK);
coleenp@46329 908 set_rewritten();
duke@1 909 }
duke@1 910
coleenp@9971 911 // Now relocate and link method entry points after class is rewritten.
coleenp@9971 912 // This is outside is_rewritten flag. In case of an exception, it can be
coleenp@9971 913 // executed more than once.
coleenp@15099 914 void InstanceKlass::link_methods(TRAPS) {
coleenp@15099 915 int len = methods()->length();
coleenp@15099 916 for (int i = len-1; i >= 0; i--) {
coleenp@15099 917 methodHandle m(THREAD, methods()->at(i));
coleenp@15099 918
coleenp@15099 919 // Set up method entry points for compiler and interpreter .
coleenp@15099 920 m->link_method(m, CHECK);
coleenp@15099 921 }
coleenp@9971 922 }
coleenp@9971 923
acorn@27402 924 // Eagerly initialize superinterfaces that declare default methods (concrete instance: any access)
hseigel@46341 925 void InstanceKlass::initialize_super_interfaces(TRAPS) {
hseigel@46341 926 assert (has_nonstatic_concrete_methods(), "caller should have checked this");
hseigel@46341 927 for (int i = 0; i < local_interfaces()->length(); ++i) {
iklam@51329 928 InstanceKlass* ik = local_interfaces()->at(i);
coleenp@41293 929
coleenp@41293 930 // Initialization is depth first search ie. we start with top of the inheritance tree
dholmes@41669 931 // has_nonstatic_concrete_methods drives searching superinterfaces since it
dholmes@41669 932 // means has_nonstatic_concrete_methods in its superinterface hierarchy
dholmes@41669 933 if (ik->has_nonstatic_concrete_methods()) {
hseigel@46341 934 ik->initialize_super_interfaces(CHECK);
coleenp@41293 935 }
coleenp@41293 936
coleenp@41293 937 // Only initialize() interfaces that "declare" concrete methods.
dholmes@41669 938 if (ik->should_be_initialized() && ik->declares_nonstatic_concrete_methods()) {
coleenp@41293 939 ik->initialize(CHECK);
acorn@27402 940 }
acorn@27402 941 }
acorn@27402 942 }
duke@1 943
hseigel@46341 944 void InstanceKlass::initialize_impl(TRAPS) {
coleenp@46271 945 HandleMark hm(THREAD);
coleenp@46271 946
duke@1 947 // Make sure klass is linked (verified) before initialization
duke@1 948 // A class could already be verified, since it has been reflected upon.
hseigel@46341 949 link_class(CHECK);
hseigel@46341 950
hseigel@46341 951 DTRACE_CLASSINIT_PROBE(required, -1);
fparain@5089 952
fparain@5089 953 bool wait = false;
fparain@5089 954
dholmes@53305 955 assert(THREAD->is_Java_thread(), "non-JavaThread in initialize_impl");
dholmes@53305 956 JavaThread* jt = (JavaThread*)THREAD;
dholmes@53305 957
duke@1 958 // refer to the JVM book page 47 for description of steps
duke@1 959 // Step 1
coleenp@13728 960 {
hseigel@46341 961 Handle h_init_lock(THREAD, init_lock());
hseigel@46562 962 ObjectLocker ol(h_init_lock, THREAD, h_init_lock() != NULL);
duke@1 963
duke@1 964 // Step 2
duke@1 965 // If we were to use wait() instead of waitInterruptibly() then
duke@1 966 // we might end up throwing IE from link/symbol resolution sites
duke@1 967 // that aren't expected to throw. This would wreak havoc. See 6320309.
dholmes@53305 968 while (is_being_initialized() && !is_reentrant_initialization(jt)) {
dholmes@53305 969 wait = true;
dholmes@53305 970 jt->set_class_to_be_initialized(this);
dcubed@56104 971 ol.wait_uninterruptibly(jt);
dholmes@53305 972 jt->set_class_to_be_initialized(NULL);
duke@1 973 }
duke@1 974
duke@1 975 // Step 3
dholmes@53305 976 if (is_being_initialized() && is_reentrant_initialization(jt)) {
hseigel@46341 977 DTRACE_CLASSINIT_PROBE_WAIT(recursive, -1, wait);
duke@1 978 return;
fparain@5089 979 }
duke@1 980
duke@1 981 // Step 4
hseigel@46341 982 if (is_initialized()) {
hseigel@46341 983 DTRACE_CLASSINIT_PROBE_WAIT(concurrent, -1, wait);
duke@1 984 return;
fparain@5089 985 }
duke@1 986
duke@1 987 // Step 5
hseigel@46341 988 if (is_in_error_state()) {
hseigel@46341 989 DTRACE_CLASSINIT_PROBE_WAIT(erroneous, -1, wait);
duke@1 990 ResourceMark rm(THREAD);
duke@1 991 const char* desc = "Could not initialize class ";
hseigel@46341 992 const char* className = external_name();
duke@1 993 size_t msglen = strlen(desc) + strlen(className) + 1;
kamg@6421 994 char* message = NEW_RESOURCE_ARRAY(char, msglen);
duke@1 995 if (NULL == message) {
duke@1 996 // Out of memory: can't create detailed error message
ccheung@47103 997 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), className);
duke@1 998 } else {
duke@1 999 jio_snprintf(message, msglen, "%s%s", desc, className);
ccheung@47103 1000 THROW_MSG(vmSymbols::java_lang_NoClassDefFoundError(), message);
duke@1 1001 }
duke@1 1002 }
duke@1 1003
duke@1 1004 // Step 6
hseigel@46341 1005 set_init_state(being_initialized);
dholmes@53305 1006 set_init_thread(jt);
duke@1 1007 }
duke@1 1008
duke@1 1009 // Step 7
coleenp@41293 1010 // Next, if C is a class rather than an interface, initialize it's super class and super
coleenp@41293 1011 // interfaces.
hseigel@46341 1012 if (!is_interface()) {
hseigel@46341 1013 Klass* super_klass = super();
coleenp@41293 1014 if (super_klass != NULL && super_klass->should_be_initialized()) {
coleenp@41293 1015 super_klass->initialize(THREAD);
coleenp@41293 1016 }
dholmes@41669 1017 // If C implements any interface that declares a non-static, concrete method,
coleenp@41293 1018 // the initialization of C triggers initialization of its super interfaces.
dholmes@41669 1019 // Only need to recurse if has_nonstatic_concrete_methods which includes declaring and
dholmes@41669 1020 // having a superinterface that declares, non-static, concrete methods
hseigel@46341 1021 if (!HAS_PENDING_EXCEPTION && has_nonstatic_concrete_methods()) {
hseigel@46341 1022 initialize_super_interfaces(THREAD);
coleenp@41293 1023 }
coleenp@41293 1024
coleenp@41293 1025 // If any exceptions, complete abruptly, throwing the same exception as above.
duke@1 1026 if (HAS_PENDING_EXCEPTION) {
duke@1 1027 Handle e(THREAD, PENDING_EXCEPTION);
duke@1 1028 CLEAR_PENDING_EXCEPTION;
duke@1 1029 {
duke@1 1030 EXCEPTION_MARK;
coleenp@41293 1031 // Locks object, set state, and notify all waiting threads
hseigel@46341 1032 set_initialization_state_and_notify(initialization_error, THREAD);
coleenp@41293 1033 CLEAR_PENDING_EXCEPTION;
duke@1 1034 }
hseigel@46341 1035 DTRACE_CLASSINIT_PROBE_WAIT(super__failed, -1, wait);
duke@1 1036 THROW_OOP(e());
duke@1 1037 }
duke@1 1038 }
duke@1 1039
kamg@14385 1040
kvn@42650 1041 // Look for aot compiled methods for this klass, including class initializer.
hseigel@46341 1042 AOTLoader::load_for_klass(this, THREAD);
kvn@42650 1043
duke@1 1044 // Step 8
duke@1 1045 {
hseigel@46341 1046 DTRACE_CLASSINIT_PROBE_WAIT(clinit, -1, wait);
duke@1 1047 // Timer includes any side effects of class initialization (resolution,
duke@1 1048 // etc), but not recursive entry into call_class_initializer().
mchung@3575 1049 PerfClassTraceTime timer(ClassLoader::perf_class_init_time(),
mchung@3575 1050 ClassLoader::perf_class_init_selftime(),
mchung@3575 1051 ClassLoader::perf_classes_inited(),
mchung@3575 1052 jt->get_thread_stat()->perf_recursion_counts_addr(),
mchung@3575 1053 jt->get_thread_stat()->perf_timers_addr(),
mchung@3575 1054 PerfClassTraceTime::CLASS_CLINIT);
hseigel@46341 1055 call_class_initializer(THREAD);
duke@1 1056 }
duke@1 1057
duke@1 1058 // Step 9
duke@1 1059 if (!HAS_PENDING_EXCEPTION) {
hseigel@46341 1060 set_initialization_state_and_notify(fully_initialized, CHECK);
iklam@46408 1061 {
iklam@46408 1062 debug_only(vtable().verify(tty, true);)
duke@1 1063 }
duke@1 1064 }
duke@1 1065 else {
duke@1 1066 // Step 10 and 11
duke@1 1067 Handle e(THREAD, PENDING_EXCEPTION);
duke@1 1068 CLEAR_PENDING_EXCEPTION;
jbachorik@22897 1069 // JVMTI has already reported the pending exception
jbachorik@22897 1070 // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
dholmes@53305 1071 JvmtiExport::clear_detected_exception(jt);
duke@1 1072 {
duke@1 1073 EXCEPTION_MARK;
hseigel@46341 1074 set_initialization_state_and_notify(initialization_error, THREAD);
duke@1 1075 CLEAR_PENDING_EXCEPTION; // ignore any exception thrown, class initialization error is thrown below
jbachorik@22897 1076 // JVMTI has already reported the pending exception
jbachorik@22897 1077 // JVMTI internal flag reset is needed in order to report ExceptionInInitializerError
dholmes@53305 1078 JvmtiExport::clear_detected_exception(jt);
duke@1 1079 }
hseigel@46341 1080 DTRACE_CLASSINIT_PROBE_WAIT(error, -1, wait);
never@4571 1081 if (e->is_a(SystemDictionary::Error_klass())) {
duke@1 1082 THROW_OOP(e());
duke@1 1083 } else {
duke@1 1084 JavaCallArguments args(e);
coleenp@8076 1085 THROW_ARG(vmSymbols::java_lang_ExceptionInInitializerError(),
coleenp@8076 1086 vmSymbols::throwable_void_signature(),
duke@1 1087 &args);
duke@1 1088 }
duke@1 1089 }
hseigel@46341 1090 DTRACE_CLASSINIT_PROBE_WAIT(end, -1, wait);
duke@1 1091 }
duke@1 1092
duke@1 1093
coleenp@13728 1094 void InstanceKlass::set_initialization_state_and_notify(ClassState state, TRAPS) {
hseigel@46341 1095 Handle h_init_lock(THREAD, init_lock());
hseigel@46562 1096 if (h_init_lock() != NULL) {
hseigel@46341 1097 ObjectLocker ol(h_init_lock, THREAD);
vlivanov@55254 1098 set_init_thread(NULL); // reset _init_thread before changing _init_state
hseigel@46341 1099 set_init_state(state);
hseigel@46341 1100 fence_and_clear_init_lock();
coleenp@41293 1101 ol.notify_all(CHECK);
coleenp@41293 1102 } else {
hseigel@46562 1103 assert(h_init_lock() != NULL, "The initialization state should never be set twice");
vlivanov@55254 1104 set_init_thread(NULL); // reset _init_thread before changing _init_state
hseigel@46341 1105 set_init_state(state);
coleenp@41293 1106 }
duke@1 1107 }
duke@1 1108
coleenp@52356 1109 Klass* InstanceKlass::implementor() const {
eosterlund@52784 1110 Klass* volatile* k = adr_implementor();
coleenp@51379 1111 if (k == NULL) {
coleenp@51379 1112 return NULL;
coleenp@51379 1113 } else {
eosterlund@52784 1114 // This load races with inserts, and therefore needs acquire.
stefank@57083 1115 Klass* kls = Atomic::load_acquire(k);
eosterlund@52784 1116 if (kls != NULL && !kls->is_loader_alive()) {
eosterlund@52784 1117 return NULL; // don't return unloaded class
eosterlund@52784 1118 } else {
eosterlund@52784 1119 return kls;
eosterlund@52784 1120 }
coleenp@51379 1121 }
coleenp@51379 1122 }
coleenp@51379 1123
eosterlund@52784 1124
coleenp@51379 1125 void InstanceKlass::set_implementor(Klass* k) {
coleenp@56445 1126 assert_locked_or_safepoint(Compile_lock);
coleenp@51379 1127 assert(is_interface(), "not interface");
eosterlund@52784 1128 Klass* volatile* addr = adr_implementor();
coleenp@51379 1129 assert(addr != NULL, "null addr");
coleenp@51379 1130 if (addr != NULL) {
stefank@57083 1131 Atomic::release_store(addr, k);
coleenp@51379 1132 }
coleenp@51379 1133 }
coleenp@51379 1134
coleenp@51379 1135 int InstanceKlass::nof_implementors() const {
coleenp@51379 1136 Klass* k = implementor();
coleenp@51379 1137 if (k == NULL) {
coleenp@51379 1138 return 0;
coleenp@51379 1139 } else if (k != this) {
coleenp@51379 1140 return 1;
coleenp@51379 1141 } else {
coleenp@51379 1142 return 2;
coleenp@51379 1143 }
coleenp@51379 1144 }
coleenp@51379 1145
jiangli@12369 1146 // The embedded _implementor field can only record one implementor.
jiangli@12369 1147 // When there are more than one implementors, the _implementor field
coleenp@13728 1148 // is set to the interface Klass* itself. Following are the possible
jiangli@12369 1149 // values for the _implementor field:
jiangli@12369 1150 // NULL - no implementor
coleenp@13728 1151 // implementor Klass* - one implementor
jiangli@12369 1152 // self - more than one implementor
jiangli@12369 1153 //
jiangli@12369 1154 // The _implementor field only exists for interfaces.
coleenp@13728 1155 void InstanceKlass::add_implementor(Klass* k) {
minqi@58209 1156 if (Universe::is_fully_initialized()) {
minqi@58209 1157 assert_lock_strong(Compile_lock);
minqi@58209 1158 }
jiangli@12369 1159 assert(is_interface(), "not interface");
duke@1 1160 // Filter out my subinterfaces.
duke@1 1161 // (Note: Interfaces are never on the subklass list.)
coleenp@13728 1162 if (InstanceKlass::cast(k)->is_interface()) return;
duke@1 1163
duke@1 1164 // Filter out subclasses whose supers already implement me.
duke@1 1165 // (Note: CHA must walk subclasses of direct implementors
duke@1 1166 // in order to locate indirect implementors.)
coleenp@33602 1167 Klass* sk = k->super();
coleenp@13728 1168 if (sk != NULL && InstanceKlass::cast(sk)->implements_interface(this))
duke@1 1169 // We only need to check one immediate superclass, since the
duke@1 1170 // implements_interface query looks at transitive_interfaces.
duke@1 1171 // Any supers of the super have the same (or fewer) transitive_interfaces.
duke@1 1172 return;
duke@1 1173
coleenp@13728 1174 Klass* ik = implementor();
jiangli@12369 1175 if (ik == NULL) {
jiangli@12369 1176 set_implementor(k);
dnsimon@57916 1177 } else if (ik != this && ik != k) {
jiangli@12369 1178 // There is already an implementor. Use itself as an indicator of
jiangli@12369 1179 // more than one implementors.
coleenp@13728 1180 set_implementor(this);
duke@1 1181 }
duke@1 1182
duke@1 1183 // The implementor also implements the transitive_interfaces
duke@1 1184 for (int index = 0; index < local_interfaces()->length(); index++) {
coleenp@13728 1185 InstanceKlass::cast(local_interfaces()->at(index))->add_implementor(k);
duke@1 1186 }
duke@1 1187 }
duke@1 1188
coleenp@13728 1189 void InstanceKlass::init_implementor() {
jiangli@12369 1190 if (is_interface()) {
jiangli@12369 1191 set_implementor(NULL);
jiangli@12369 1192 }
duke@1 1193 }
duke@1 1194
duke@1 1195
coleenp@13728 1196 void InstanceKlass::process_interfaces(Thread *thread) {
duke@1 1197 // link this class into the implementors list of every interface it implements
duke@1 1198 for (int i = local_interfaces()->length() - 1; i >= 0; i--) {
coleenp@13728 1199 assert(local_interfaces()->at(i)->is_klass(), "must be a klass");
coleenp@13728 1200 InstanceKlass* interf = InstanceKlass::cast(local_interfaces()->at(i));
duke@1 1201 assert(interf->is_interface(), "expected interface");
coleenp@23515 1202 interf->add_implementor(this);
duke@1 1203 }
duke@1 1204 }
duke@1 1205
coleenp@13728 1206 bool InstanceKlass::can_be_primary_super_slow() const {
duke@1 1207 if (is_interface())
duke@1 1208 return false;
duke@1 1209 else
duke@1 1210 return Klass::can_be_primary_super_slow();
duke@1 1211 }
duke@1 1212
ccheung@49948 1213 GrowableArray<Klass*>* InstanceKlass::compute_secondary_supers(int num_extra_slots,
iklam@51329 1214 Array<InstanceKlass*>* transitive_interfaces) {
duke@1 1215 // The secondaries are the implemented interfaces.
iklam@51329 1216 Array<InstanceKlass*>* interfaces = transitive_interfaces;
duke@1 1217 int num_secondaries = num_extra_slots + interfaces->length();
duke@1 1218 if (num_secondaries == 0) {
coleenp@13728 1219 // Must share this for correct bootstrapping!
coleenp@13728 1220 set_secondary_supers(Universe::the_empty_klass_array());
coleenp@13728 1221 return NULL;
duke@1 1222 } else if (num_extra_slots == 0) {
iklam@51329 1223 // The secondary super list is exactly the same as the transitive interfaces, so
iklam@51329 1224 // let's use it instead of making a copy.
coleenp@13728 1225 // Redefine classes has to be careful not to delete this!
iklam@51329 1226 // We need the cast because Array<Klass*> is NOT a supertype of Array<InstanceKlass*>,
iklam@51329 1227 // (but it's safe to do here because we won't write into _secondary_supers from this point on).
iklam@51329 1228 set_secondary_supers((Array<Klass*>*)(address)interfaces);
coleenp@13728 1229 return NULL;
duke@1 1230 } else {
coleenp@13728 1231 // Copy transitive interfaces to a temporary growable array to be constructed
coleenp@13728 1232 // into the secondary super list with extra slots.
coleenp@13728 1233 GrowableArray<Klass*>* secondaries = new GrowableArray<Klass*>(interfaces->length());
duke@1 1234 for (int i = 0; i < interfaces->length(); i++) {
coleenp@13728 1235 secondaries->push(interfaces->at(i));
duke@1 1236 }
duke@1 1237 return secondaries;
duke@1 1238 }
duke@1 1239 }
duke@1 1240
coleenp@13728 1241 bool InstanceKlass::implements_interface(Klass* k) const {
coleenp@13728 1242 if (this == k) return true;
hseigel@14488 1243 assert(k->is_interface(), "should be an interface class");
duke@1 1244 for (int i = 0; i < transitive_interfaces()->length(); i++) {
coleenp@13728 1245 if (transitive_interfaces()->at(i) == k) {
duke@1 1246 return true;
duke@1 1247 }
duke@1 1248 }
duke@1 1249 return false;
duke@1 1250 }
duke@1 1251
hseigel@21768 1252 bool InstanceKlass::is_same_or_direct_interface(Klass *k) const {
hseigel@21768 1253 // Verify direct super interface
hseigel@21768 1254 if (this == k) return true;
hseigel@21768 1255 assert(k->is_interface(), "should be an interface class");
hseigel@21768 1256 for (int i = 0; i < local_interfaces()->length(); i++) {
hseigel@21768 1257 if (local_interfaces()->at(i) == k) {
hseigel@21768 1258 return true;
hseigel@21768 1259 }
hseigel@21768 1260 }
hseigel@21768 1261 return false;
hseigel@21768 1262 }
hseigel@21768 1263
coleenp@13728 1264 objArrayOop InstanceKlass::allocate_objArray(int n, int length, TRAPS) {
dnsimon@52033 1265 check_array_allocation_length(length, arrayOopDesc::max_array_length(T_OBJECT), CHECK_NULL);
duke@1 1266 int size = objArrayOopDesc::object_size(length);
coleenp@13728 1267 Klass* ak = array_klass(n, CHECK_NULL);
eosterlund@50882 1268 objArrayOop o = (objArrayOop)Universe::heap()->array_allocate(ak, size, length,
eosterlund@50882 1269 /* do_zero */ true, CHECK_NULL);
duke@1 1270 return o;
duke@1 1271 }
duke@1 1272
coleenp@13728 1273 instanceOop InstanceKlass::register_finalizer(instanceOop i, TRAPS) {
duke@1 1274 if (TraceFinalizerRegistration) {
duke@1 1275 tty->print("Registered ");
duke@1 1276 i->print_value_on(tty);
david@33148 1277 tty->print_cr(" (" INTPTR_FORMAT ") as finalizable", p2i(i));
duke@1 1278 }
duke@1 1279 instanceHandle h_i(THREAD, i);
duke@1 1280 // Pass the handle as argument, JavaCalls::call expects oop as jobjects
duke@1 1281 JavaValue result(T_VOID);
duke@1 1282 JavaCallArguments args(h_i);
duke@1 1283 methodHandle mh (THREAD, Universe::finalizer_register_method());
duke@1 1284 JavaCalls::call(&result, mh, &args, CHECK_NULL);
duke@1 1285 return h_i();
duke@1 1286 }
duke@1 1287
coleenp@13728 1288 instanceOop InstanceKlass::allocate_instance(TRAPS) {
duke@1 1289 bool has_finalizer_flag = has_finalizer(); // Query before possible GC
duke@1 1290 int size = size_helper(); // Query before forming handle.
duke@1 1291
duke@1 1292 instanceOop i;
duke@1 1293
eosterlund@50882 1294 i = (instanceOop)Universe::heap()->obj_allocate(this, size, CHECK_NULL);
duke@1 1295 if (has_finalizer_flag && !RegisterFinalizersAtInit) {
duke@1 1296 i = register_finalizer(i, CHECK_NULL);
duke@1 1297 }
duke@1 1298 return i;
duke@1 1299 }
duke@1 1300
simonis@49393 1301 instanceHandle InstanceKlass::allocate_instance_handle(TRAPS) {
simonis@49393 1302 return instanceHandle(THREAD, allocate_instance(THREAD));
simonis@49393 1303 }
simonis@49393 1304
coleenp@13728 1305 void InstanceKlass::check_valid_for_instantiation(bool throwError, TRAPS) {
duke@1 1306 if (is_interface() || is_abstract()) {
duke@1 1307 ResourceMark rm(THREAD);
duke@1 1308 THROW_MSG(throwError ? vmSymbols::java_lang_InstantiationError()
duke@1 1309 : vmSymbols::java_lang_InstantiationException(), external_name());
duke@1 1310 }
coleenp@13728 1311 if (this == SystemDictionary::Class_klass()) {
duke@1 1312 ResourceMark rm(THREAD);
duke@1 1313 THROW_MSG(throwError ? vmSymbols::java_lang_IllegalAccessError()
duke@1 1314 : vmSymbols::java_lang_IllegalAccessException(), external_name());
duke@1 1315 }
duke@1 1316 }
duke@1 1317
coleenp@13728 1318 Klass* InstanceKlass::array_klass_impl(bool or_null, int n, TRAPS) {
dholmes@40887 1319 // Need load-acquire for lock-free read
hseigel@46341 1320 if (array_klasses_acquire() == NULL) {
duke@1 1321 if (or_null) return NULL;
duke@1 1322
iklam@57387 1323 ResourceMark rm(THREAD);
duke@1 1324 JavaThread *jt = (JavaThread *)THREAD;
duke@1 1325 {
duke@1 1326 // Atomic creation of array_klasses
hseigel@57716 1327 MutexLocker ma(THREAD, MultiArray_lock);
duke@1 1328
duke@1 1329 // Check if update has already taken place
hseigel@46341 1330 if (array_klasses() == NULL) {
hseigel@46341 1331 Klass* k = ObjArrayKlass::allocate_objArray_klass(class_loader_data(), 1, this, CHECK_NULL);
dholmes@40887 1332 // use 'release' to pair with lock-free load
hseigel@46341 1333 release_set_array_klasses(k);
duke@1 1334 }
duke@1 1335 }
duke@1 1336 }
duke@1 1337 // _this will always be set at this point
hseigel@46341 1338 ObjArrayKlass* oak = (ObjArrayKlass*)array_klasses();
duke@1 1339 if (or_null) {
duke@1 1340 return oak->array_klass_or_null(n);
duke@1 1341 }
stefank@27680 1342 return oak->array_klass(n, THREAD);
duke@1 1343 }
duke@1 1344
coleenp@13728 1345 Klass* InstanceKlass::array_klass_impl(bool or_null, TRAPS) {
duke@1 1346 return array_klass_impl(or_null, 1, THREAD);
duke@1 1347 }
duke@1 1348
hseigel@46341 1349 static int call_class_initializer_counter = 0; // for debugging
duke@1 1350
coleenp@46329 1351 Method* InstanceKlass::class_initializer() const {
coleenp@13728 1352 Method* clinit = find_method(
kamg@8653 1353 vmSymbols::class_initializer_name(), vmSymbols::void_method_signature());
kamg@8653 1354 if (clinit != NULL && clinit->has_valid_initializer_flags()) {
kamg@8653 1355 return clinit;
kamg@8653 1356 }
kamg@8653 1357 return NULL;
duke@1 1358 }
duke@1 1359
hseigel@46341 1360 void InstanceKlass::call_class_initializer(TRAPS) {
minqi@14477 1361 if (ReplayCompiles &&
minqi@14477 1362 (ReplaySuppressInitializers == 1 ||
jwilhelm@46630 1363 (ReplaySuppressInitializers >= 2 && class_loader() != NULL))) {
minqi@14477 1364 // Hide the existence of the initializer for the purpose of replaying the compile
minqi@14477 1365 return;
minqi@14477 1366 }
minqi@14477 1367
hseigel@46341 1368 methodHandle h_method(THREAD, class_initializer());
hseigel@46341 1369 assert(!is_initialized(), "we cannot initialize twice");
stuefe@46701 1370 LogTarget(Info, class, init) lt;
stuefe@46701 1371 if (lt.is_enabled()) {
iklam@57387 1372 ResourceMark rm(THREAD);
stuefe@46701 1373 LogStream ls(lt);
stuefe@46701 1374 ls.print("%d Initializing ", call_class_initializer_counter++);
stuefe@46701 1375 name()->print_value_on(&ls);
stuefe@46701 1376 ls.print_cr("%s (" INTPTR_FORMAT ")", h_method() == NULL ? "(no method)" : "", p2i(this));
duke@1 1377 }
duke@1 1378 if (h_method() != NULL) {
duke@1 1379 JavaCallArguments args; // No arguments
duke@1 1380 JavaValue result(T_VOID);
duke@1 1381 JavaCalls::call(&result, h_method, &args, CHECK); // Static call (no args)
duke@1 1382 }
duke@1 1383 }
duke@1 1384
duke@1 1385
coleenp@33593 1386 void InstanceKlass::mask_for(const methodHandle& method, int bci,
duke@1 1387 InterpreterOopMap* entry_for) {
dholmes@38937 1388 // Lazily create the _oop_map_cache at first request
coleenp@47634 1389 // Lock-free access requires load_acquire.
stefank@57083 1390 OopMapCache* oop_map_cache = Atomic::load_acquire(&_oop_map_cache);
dholmes@38937 1391 if (oop_map_cache == NULL) {
duke@1 1392 MutexLocker x(OopMapCacheAlloc_lock);
dholmes@38937 1393 // Check if _oop_map_cache was allocated while we were waiting for this lock
dholmes@38937 1394 if ((oop_map_cache = _oop_map_cache) == NULL) {
dholmes@38937 1395 oop_map_cache = new OopMapCache();
dholmes@38937 1396 // Ensure _oop_map_cache is stable, since it is examined without a lock
stefank@57083 1397 Atomic::release_store(&_oop_map_cache, oop_map_cache);
duke@1 1398 }
duke@1 1399 }
dholmes@38937 1400 // _oop_map_cache is constant after init; lookup below does its own locking.
dholmes@38937 1401 oop_map_cache->lookup(method, bci, entry_for);
duke@1 1402 }
duke@1 1403
fparain@57985 1404 bool InstanceKlass::contains_field_offset(int offset) {
fparain@57985 1405 fieldDescriptor fd;
fparain@57985 1406 return find_field_from_offset(offset, false, &fd);
fparain@57985 1407 }
duke@1 1408
coleenp@13728 1409 bool InstanceKlass::find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
coleenp@13728 1410 for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
never@10546 1411 Symbol* f_name = fs.name();
never@10546 1412 Symbol* f_sig = fs.signature();
duke@1 1413 if (f_name == name && f_sig == sig) {
drchase@20017 1414 fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
duke@1 1415 return true;
duke@1 1416 }
duke@1 1417 }
duke@1 1418 return false;
duke@1 1419 }
duke@1 1420
duke@1 1421
coleenp@13728 1422 Klass* InstanceKlass::find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
duke@1 1423 const int n = local_interfaces()->length();
duke@1 1424 for (int i = 0; i < n; i++) {
coleenp@13728 1425 Klass* intf1 = local_interfaces()->at(i);
hseigel@14488 1426 assert(intf1->is_interface(), "just checking type");
duke@1 1427 // search for field in current interface
coleenp@13728 1428 if (InstanceKlass::cast(intf1)->find_local_field(name, sig, fd)) {
duke@1 1429 assert(fd->is_static(), "interface field must be static");
duke@1 1430 return intf1;
duke@1 1431 }
duke@1 1432 // search for field in direct superinterfaces
coleenp@13728 1433 Klass* intf2 = InstanceKlass::cast(intf1)->find_interface_field(name, sig, fd);
duke@1 1434 if (intf2 != NULL) return intf2;
duke@1 1435 }
duke@1 1436 // otherwise field lookup fails
duke@1 1437 return NULL;
duke@1 1438 }
duke@1 1439
duke@1 1440
coleenp@13728 1441 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const {
duke@1 1442 // search order according to newest JVM spec (5.4.3.2, p.167).
duke@1 1443 // 1) search for field in current klass
duke@1 1444 if (find_local_field(name, sig, fd)) {
coleenp@13728 1445 return const_cast<InstanceKlass*>(this);
duke@1 1446 }
duke@1 1447 // 2) search for field recursively in direct superinterfaces
coleenp@13728 1448 { Klass* intf = find_interface_field(name, sig, fd);
duke@1 1449 if (intf != NULL) return intf;
duke@1 1450 }
duke@1 1451 // 3) apply field lookup recursively if superclass exists
coleenp@13728 1452 { Klass* supr = super();
coleenp@13728 1453 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, fd);
duke@1 1454 }
duke@1 1455 // 4) otherwise field lookup fails
duke@1 1456 return NULL;
duke@1 1457 }
duke@1 1458
duke@1 1459
coleenp@13728 1460 Klass* InstanceKlass::find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const {
duke@1 1461 // search order according to newest JVM spec (5.4.3.2, p.167).
duke@1 1462 // 1) search for field in current klass
duke@1 1463 if (find_local_field(name, sig, fd)) {
coleenp@13728 1464 if (fd->is_static() == is_static) return const_cast<InstanceKlass*>(this);
duke@1 1465 }
duke@1 1466 // 2) search for field recursively in direct superinterfaces
duke@1 1467 if (is_static) {
coleenp@13728 1468 Klass* intf = find_interface_field(name, sig, fd);
duke@1 1469 if (intf != NULL) return intf;
duke@1 1470 }
duke@1 1471 // 3) apply field lookup recursively if superclass exists
coleenp@13728 1472 { Klass* supr = super();
coleenp@13728 1473 if (supr != NULL) return InstanceKlass::cast(supr)->find_field(name, sig, is_static, fd);
duke@1 1474 }
duke@1 1475 // 4) otherwise field lookup fails
duke@1 1476 return NULL;
duke@1 1477 }
duke@1 1478
duke@1 1479
coleenp@13728 1480 bool InstanceKlass::find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
coleenp@13728 1481 for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
never@10546 1482 if (fs.offset() == offset) {
drchase@20017 1483 fd->reinitialize(const_cast<InstanceKlass*>(this), fs.index());
duke@1 1484 if (fd->is_static() == is_static) return true;
duke@1 1485 }
duke@1 1486 }
duke@1 1487 return false;
duke@1 1488 }
duke@1 1489
duke@1 1490
coleenp@13728 1491 bool InstanceKlass::find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const {
coleenp@13728 1492 Klass* klass = const_cast<InstanceKlass*>(this);
duke@1 1493 while (klass != NULL) {
coleenp@13728 1494 if (InstanceKlass::cast(klass)->find_local_field_from_offset(offset, is_static, fd)) {
duke@1 1495 return true;
duke@1 1496 }
hseigel@14488 1497 klass = klass->super();
duke@1 1498 }
duke@1 1499 return false;
duke@1 1500 }
duke@1 1501
duke@1 1502
coleenp@13728 1503 void InstanceKlass::methods_do(void f(Method* method)) {
coleenp@24658 1504 // Methods aren't stable until they are loaded. This can be read outside
coleenp@24658 1505 // a lock through the ClassLoaderData for profiling
coleenp@24658 1506 if (!is_loaded()) {
coleenp@24658 1507 return;
coleenp@24658 1508 }
coleenp@24658 1509
duke@1 1510 int len = methods()->length();
duke@1 1511 for (int index = 0; index < len; index++) {
coleenp@13728 1512 Method* m = methods()->at(index);
duke@1 1513 assert(m->is_method(), "must be method");
duke@1 1514 f(m);
duke@1 1515 }
duke@1 1516 }
duke@1 1517
never@8725 1518
coleenp@13728 1519 void InstanceKlass::do_local_static_fields(FieldClosure* cl) {
never@10546 1520 for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
never@10546 1521 if (fs.access_flags().is_static()) {
drchase@20017 1522 fieldDescriptor& fd = fs.field_descriptor();
never@10546 1523 cl->do_field(&fd);
never@10546 1524 }
duke@1 1525 }
duke@1 1526 }
duke@1 1527
duke@1 1528
coleenp@23872 1529 void InstanceKlass::do_local_static_fields(void f(fieldDescriptor*, Handle, TRAPS), Handle mirror, TRAPS) {
hseigel@46341 1530 for (JavaFieldStream fs(this); !fs.done(); fs.next()) {
never@10546 1531 if (fs.access_flags().is_static()) {
drchase@20017 1532 fieldDescriptor& fd = fs.field_descriptor();
coleenp@23872 1533 f(&fd, mirror, CHECK);
never@10546 1534 }
duke@1 1535 }
duke@1 1536 }
duke@1 1537
duke@1 1538
kvn@217 1539 static int compare_fields_by_offset(int* a, int* b) {
kvn@217 1540 return a[0] - b[0];
kvn@217 1541 }
kvn@217 1542
coleenp@13728 1543 void InstanceKlass::do_nonstatic_fields(FieldClosure* cl) {
coleenp@13728 1544 InstanceKlass* super = superklass();
duke@1 1545 if (super != NULL) {
duke@1 1546 super->do_nonstatic_fields(cl);
duke@1 1547 }
kvn@217 1548 fieldDescriptor fd;
never@10546 1549 int length = java_fields_count();
kvn@217 1550 // In DebugInfo nonstatic fields are sorted by offset.
zgu@13195 1551 int* fields_sorted = NEW_C_HEAP_ARRAY(int, 2*(length+1), mtClass);
kvn@217 1552 int j = 0;
never@10546 1553 for (int i = 0; i < length; i += 1) {
drchase@20017 1554 fd.reinitialize(this, i);
kvn@217 1555 if (!fd.is_static()) {
kvn@217 1556 fields_sorted[j + 0] = fd.offset();
kvn@217 1557 fields_sorted[j + 1] = i;
kvn@217 1558 j += 2;
kvn@217 1559 }
duke@1 1560 }
kvn@217 1561 if (j > 0) {
kvn@217 1562 length = j;
kvn@217 1563 // _sort_Fn is defined in growableArray.hpp.
kvn@217 1564 qsort(fields_sorted, length/2, 2*sizeof(int), (_sort_Fn)compare_fields_by_offset);
kvn@217 1565 for (int i = 0; i < length; i += 2) {
drchase@20017 1566 fd.reinitialize(this, fields_sorted[i + 1]);
kvn@217 1567 assert(!fd.is_static() && fd.offset() == fields_sorted[i], "only nonstatic fields");
kvn@217 1568 cl->do_field(&fd);
kvn@217 1569 }
kvn@217 1570 }
coleenp@27880 1571 FREE_C_HEAP_ARRAY(int, fields_sorted);
duke@1 1572 }
duke@1 1573
duke@1 1574
coleenp@13728 1575 void InstanceKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) {
coleenp@13728 1576 if (array_klasses() != NULL)
coleenp@13952 1577 ArrayKlass::cast(array_klasses())->array_klasses_do(f, THREAD);
coleenp@13728 1578 }
coleenp@13728 1579
coleenp@13728 1580 void InstanceKlass::array_klasses_do(void f(Klass* k)) {
duke@1 1581 if (array_klasses() != NULL)
coleenp@13952 1582 ArrayKlass::cast(array_klasses())->array_klasses_do(f);
duke@1 1583 }
duke@1 1584
duke@1 1585 #ifdef ASSERT
mgronlun@34666 1586 static int linear_search(const Array<Method*>* methods,
mgronlun@34666 1587 const Symbol* name,
mgronlun@34666 1588 const Symbol* signature) {
mgronlun@34666 1589 const int len = methods->length();
duke@1 1590 for (int index = 0; index < len; index++) {
mgronlun@34666 1591 const Method* const m = methods->at(index);
duke@1 1592 assert(m->is_method(), "must be method");
duke@1 1593 if (m->signature() == signature && m->name() == name) {
duke@1 1594 return index;
duke@1 1595 }
duke@1 1596 }
duke@1 1597 return -1;
duke@1 1598 }
duke@1 1599 #endif
duke@1 1600
iklam@56936 1601 bool InstanceKlass::_disable_method_binary_search = false;
iklam@56936 1602
redestad@57287 1603 NOINLINE int linear_search(const Array<Method*>* methods, const Symbol* name) {
duke@1 1604 int len = methods->length();
duke@1 1605 int l = 0;
duke@1 1606 int h = len - 1;
redestad@57287 1607 while (l <= h) {
redestad@57287 1608 Method* m = methods->at(l);
redestad@57287 1609 if (m->name() == name) {
redestad@57287 1610 return l;
redestad@57287 1611 }
redestad@57287 1612 l++;
redestad@57287 1613 }
redestad@57287 1614 return -1;
redestad@57287 1615 }
redestad@57287 1616
redestad@57287 1617 inline int InstanceKlass::quick_search(const Array<Method*>* methods, const Symbol* name) {
iklam@56936 1618 if (_disable_method_binary_search) {
redestad@57287 1619 assert(DynamicDumpSharedSpaces, "must be");
iklam@56936 1620 // At the final stage of dynamic dumping, the methods array may not be sorted
iklam@56936 1621 // by ascending addresses of their names, so we can't use binary search anymore.
iklam@56936 1622 // However, methods with the same name are still laid out consecutively inside the
iklam@56936 1623 // methods array, so let's look for the first one that matches.
redestad@57287 1624 return linear_search(methods, name);
iklam@56936 1625 }
iklam@56936 1626
redestad@57287 1627 int len = methods->length();
redestad@57287 1628 int l = 0;
redestad@57287 1629 int h = len - 1;
redestad@57287 1630
iklam@56936 1631 // methods are sorted by ascending addresses of their names, so do binary search
duke@1 1632 while (l <= h) {
duke@1 1633 int mid = (l + h) >> 1;
coleenp@13728 1634 Method* m = methods->at(mid);
duke@1 1635 assert(m->is_method(), "must be method");
duke@1 1636 int res = m->name()->fast_compare(name);
duke@1 1637 if (res == 0) {
kamg@14385 1638 return mid;
duke@1 1639 } else if (res < 0) {
duke@1 1640 l = mid + 1;
duke@1 1641 } else {
duke@1 1642 h = mid - 1;
duke@1 1643 }
duke@1 1644 }
kamg@14385 1645 return -1;
kamg@14385 1646 }
kamg@14385 1647
acorn@20391 1648 // find_method looks up the name/signature in the local methods array
mgronlun@34666 1649 Method* InstanceKlass::find_method(const Symbol* name,
mgronlun@34666 1650 const Symbol* signature) const {
acorn@32189 1651 return find_method_impl(name, signature, find_overpass, find_static, find_private);
lfoltan@23999 1652 }
lfoltan@23999 1653
mgronlun@34666 1654 Method* InstanceKlass::find_method_impl(const Symbol* name,
mgronlun@34666 1655 const Symbol* signature,
acorn@32189 1656 OverpassLookupMode overpass_mode,
acorn@32189 1657 StaticLookupMode static_mode,
acorn@32189 1658 PrivateLookupMode private_mode) const {
mgronlun@34666 1659 return InstanceKlass::find_method_impl(methods(),
mgronlun@34666 1660 name,
mgronlun@34666 1661 signature,
mgronlun@34666 1662 overpass_mode,
mgronlun@34666 1663 static_mode,
mgronlun@34666 1664 private_mode);
kamg@14385 1665 }
kamg@14385 1666
acorn@21913 1667 // find_instance_method looks up the name/signature in the local methods array
acorn@21913 1668 // and skips over static methods
mgronlun@34666 1669 Method* InstanceKlass::find_instance_method(const Array<Method*>* methods,
mgronlun@34666 1670 const Symbol* name,
dholmes@50735 1671 const Symbol* signature,
dholmes@50735 1672 PrivateLookupMode private_mode) {
mgronlun@34666 1673 Method* const meth = InstanceKlass::find_method_impl(methods,
mgronlun@34666 1674 name,
mgronlun@34666 1675 signature,
mgronlun@34666 1676 find_overpass,
mgronlun@34666 1677 skip_static,
dholmes@50735 1678 private_mode);
mgronlun@34666 1679 assert(((meth == NULL) || !meth->is_static()),
mgronlun@34666 1680 "find_instance_method should have skipped statics");
acorn@21913 1681 return meth;
acorn@21913 1682 }
acorn@21913 1683
drchase@28514 1684 // find_instance_method looks up the name/signature in the local methods array
drchase@28514 1685 // and skips over static methods
dholmes@50735 1686 Method* InstanceKlass::find_instance_method(const Symbol* name,
dholmes@50735 1687 const Symbol* signature,
dholmes@50735 1688 PrivateLookupMode private_mode) const {
dholmes@50735 1689 return InstanceKlass::find_instance_method(methods(), name, signature, private_mode);
drchase@28514 1690 }
drchase@28514 1691
acorn@32189 1692 // Find looks up the name/signature in the local methods array
acorn@32189 1693 // and filters on the overpass, static and private flags
acorn@32189 1694 // This returns the first one found
acorn@32189 1695 // note that the local methods array can have up to one overpass, one static
acorn@32189 1696 // and one instance (private or not) with the same name/signature
mgronlun@34666 1697 Method* InstanceKlass::find_local_method(const Symbol* name,
mgronlun@34666 1698 const Symbol* signature,
mgronlun@34666 1699 OverpassLookupMode overpass_mode,
mgronlun@34666 1700 StaticLookupMode static_mode,
mgronlun@34666 1701 PrivateLookupMode private_mode) const {
mgronlun@34666 1702 return InstanceKlass::find_method_impl(methods(),
mgronlun@34666 1703 name,
mgronlun@34666 1704 signature,
mgronlun@34666 1705 overpass_mode,
mgronlun@34666 1706 static_mode,
mgronlun@34666 1707 private_mode);
acorn@32189 1708 }
acorn@32189 1709
acorn@32189 1710 // Find looks up the name/signature in the local methods array
acorn@32189 1711 // and filters on the overpass, static and private flags
acorn@32189 1712 // This returns the first one found
acorn@32189 1713 // note that the local methods array can have up to one overpass, one static
acorn@32189 1714 // and one instance (private or not) with the same name/signature
mgronlun@34666 1715 Method* InstanceKlass::find_local_method(const Array<Method*>* methods,
mgronlun@34666 1716 const Symbol* name,
mgronlun@34666 1717 const Symbol* signature,
mgronlun@34666 1718 OverpassLookupMode overpass_mode,
mgronlun@34666 1719 StaticLookupMode static_mode,
mgronlun@34666 1720 PrivateLookupMode private_mode) {
mgronlun@34666 1721 return InstanceKlass::find_method_impl(methods,
mgronlun@34666 1722 name,
mgronlun@34666 1723 signature,
mgronlun@34666 1724 overpass_mode,
mgronlun@34666 1725 static_mode,
mgronlun@34666 1726 private_mode);
mgronlun@34666 1727 }
mgronlun@34666 1728
mgronlun@34666 1729 Method* InstanceKlass::find_method(const Array<Method*>* methods,
mgronlun@34666 1730 const Symbol* name,
mgronlun@34666 1731 const Symbol* signature) {
mgronlun@34666 1732 return InstanceKlass::find_method_impl(methods,
mgronlun@34666 1733 name,
mgronlun@34666 1734 signature,
mgronlun@34666 1735 find_overpass,
mgronlun@34666 1736 find_static,
mgronlun@34666 1737 find_private);
mgronlun@34666 1738 }
mgronlun@34666 1739
mgronlun@34666 1740 Method* InstanceKlass::find_method_impl(const Array<Method*>* methods,
mgronlun@34666 1741 const Symbol* name,
mgronlun@34666 1742 const Symbol* signature,
acorn@32189 1743 OverpassLookupMode overpass_mode,
acorn@32189 1744 StaticLookupMode static_mode,
acorn@32189 1745 PrivateLookupMode private_mode) {
acorn@32189 1746 int hit = find_method_index(methods, name, signature, overpass_mode, static_mode, private_mode);
acorn@20391 1747 return hit >= 0 ? methods->at(hit): NULL;
acorn@20391 1748 }
acorn@20391 1749
mgronlun@34666 1750 // true if method matches signature and conforms to skipping_X conditions.
mgronlun@34666 1751 static bool method_matches(const Method* m,
mgronlun@34666 1752 const Symbol* signature,
mgronlun@34666 1753 bool skipping_overpass,
mgronlun@34666 1754 bool skipping_static,
mgronlun@34666 1755 bool skipping_private) {
mgronlun@34666 1756 return ((m->signature() == signature) &&
mgronlun@34666 1757 (!skipping_overpass || !m->is_overpass()) &&
mgronlun@34666 1758 (!skipping_static || !m->is_static()) &&
mgronlun@34666 1759 (!skipping_private || !m->is_private()));
drchase@28514 1760 }
drchase@28514 1761
acorn@20391 1762 // Used directly for default_methods to find the index into the
acorn@20391 1763 // default_vtable_indices, and indirectly by find_method
acorn@20391 1764 // find_method_index looks in the local methods array to return the index
lfoltan@23999 1765 // of the matching name/signature. If, overpass methods are being ignored,
lfoltan@23999 1766 // the search continues to find a potential non-overpass match. This capability
lfoltan@23999 1767 // is important during method resolution to prefer a static method, for example,
lfoltan@23999 1768 // over an overpass method.
acorn@32189 1769 // There is the possibility in any _method's array to have the same name/signature
acorn@32189 1770 // for a static method, an overpass method and a local instance method
acorn@32189 1771 // To correctly catch a given method, the search criteria may need
acorn@32189 1772 // to explicitly skip the other two. For local instance methods, it
acorn@32189 1773 // is often necessary to skip private methods
mgronlun@34666 1774 int InstanceKlass::find_method_index(const Array<Method*>* methods,
mgronlun@34666 1775 const Symbol* name,
mgronlun@34666 1776 const Symbol* signature,
mgronlun@34666 1777 OverpassLookupMode overpass_mode,
mgronlun@34666 1778 StaticLookupMode static_mode,
mgronlun@34666 1779 PrivateLookupMode private_mode) {
mgronlun@34666 1780 const bool skipping_overpass = (overpass_mode == skip_overpass);
mgronlun@34666 1781 const bool skipping_static = (static_mode == skip_static);
mgronlun@34666 1782 const bool skipping_private = (private_mode == skip_private);
iklam@56936 1783 const int hit = quick_search(methods, name);
kamg@14385 1784 if (hit != -1) {
mgronlun@34666 1785 const Method* const m = methods->at(hit);
drchase@28514 1786
kamg@14385 1787 // Do linear search to find matching signature. First, quick check
lfoltan@23999 1788 // for common case, ignoring overpasses if requested.
mgronlun@34666 1789 if (method_matches(m, signature, skipping_overpass, skipping_static, skipping_private)) {
dholmes@50735 1790 return hit;
mgronlun@34666 1791 }
lfoltan@23999 1792
kamg@14385 1793 // search downwards through overloaded methods
kamg@14385 1794 int i;
kamg@14385 1795 for (i = hit - 1; i >= 0; --i) {
mgronlun@34666 1796 const Method* const m = methods->at(i);
kamg@14385 1797 assert(m->is_method(), "must be method");
mgronlun@34666 1798 if (m->name() != name) {
mgronlun@34666 1799 break;
mgronlun@34666 1800 }
mgronlun@34666 1801 if (method_matches(m, signature, skipping_overpass, skipping_static, skipping_private)) {
mgronlun@34666 1802 return i;
mgronlun@34666 1803 }
kamg@14385 1804 }
kamg@14385 1805 // search upwards
kamg@14385 1806 for (i = hit + 1; i < methods->length(); ++i) {
mgronlun@34666 1807 const Method* const m = methods->at(i);
kamg@14385 1808 assert(m->is_method(), "must be method");
mgronlun@34666 1809 if (m->name() != name) {
mgronlun@34666 1810 break;
mgronlun@34666 1811 }
mgronlun@34666 1812 if (method_matches(m, signature, skipping_overpass, skipping_static, skipping_private)) {
mgronlun@34666 1813 return i;
mgronlun@34666 1814 }
kamg@14385 1815 }
kamg@14385 1816 // not found
duke@1 1817 #ifdef ASSERT
mgronlun@34666 1818 const int index = (skipping_overpass || skipping_static || skipping_private) ? -1 :
mgronlun@34666 1819 linear_search(methods, name, signature);
mgronlun@34666 1820 assert(-1 == index, "binary search should have found entry %d", index);
duke@1 1821 #endif
kamg@14385 1822 }
acorn@20391 1823 return -1;
duke@1 1824 }
mgronlun@34666 1825
mgronlun@34666 1826 int InstanceKlass::find_method_by_name(const Symbol* name, int* end) const {
kamg@14385 1827 return find_method_by_name(methods(), name, end);
kamg@14385 1828 }
kamg@14385 1829
mgronlun@34666 1830 int InstanceKlass::find_method_by_name(const Array<Method*>* methods,
mgronlun@34666 1831 const Symbol* name,
mgronlun@34666 1832 int* end_ptr) {
kamg@14385 1833 assert(end_ptr != NULL, "just checking");
iklam@56936 1834 int start = quick_search(methods, name);
kamg@14385 1835 int end = start + 1;
kamg@14385 1836 if (start != -1) {
kamg@14385 1837 while (start - 1 >= 0 && (methods->at(start - 1))->name() == name) --start;
kamg@14385 1838 while (end < methods->length() && (methods->at(end))->name() == name) ++end;
kamg@14385 1839 *end_ptr = end;
kamg@14385 1840 return start;
kamg@14385 1841 }
kamg@14385 1842 return -1;
kamg@14385 1843 }
kamg@14385 1844
hseigel@22232 1845 // uncached_lookup_method searches both the local class methods array and all
dholmes@50735 1846 // superclasses methods arrays, skipping any overpass methods in superclasses,
dholmes@50735 1847 // and possibly skipping private methods.
mgronlun@34666 1848 Method* InstanceKlass::uncached_lookup_method(const Symbol* name,
mgronlun@34666 1849 const Symbol* signature,
dholmes@50735 1850 OverpassLookupMode overpass_mode,
dholmes@50735 1851 PrivateLookupMode private_mode) const {
lfoltan@28731 1852 OverpassLookupMode overpass_local_mode = overpass_mode;
mgronlun@34666 1853 const Klass* klass = this;
duke@1 1854 while (klass != NULL) {
mgronlun@34666 1855 Method* const method = InstanceKlass::cast(klass)->find_method_impl(name,
mgronlun@34666 1856 signature,
mgronlun@34666 1857 overpass_local_mode,
mgronlun@34666 1858 find_static,
dholmes@50735 1859 private_mode);
lfoltan@23999 1860 if (method != NULL) {
hseigel@22232 1861 return method;
hseigel@22232 1862 }
coleenp@33602 1863 klass = klass->super();
lfoltan@28731 1864 overpass_local_mode = skip_overpass; // Always ignore overpass methods in superclasses
duke@1 1865 }
duke@1 1866 return NULL;
duke@1 1867 }
duke@1 1868
dsamersoff@24828 1869 #ifdef ASSERT
dsamersoff@24828 1870 // search through class hierarchy and return true if this class or
dsamersoff@24828 1871 // one of the superclasses was redefined
mgronlun@34666 1872 bool InstanceKlass::has_redefined_this_or_super() const {
mgronlun@34666 1873 const Klass* klass = this;
dsamersoff@24828 1874 while (klass != NULL) {
coleenp@33602 1875 if (InstanceKlass::cast(klass)->has_been_redefined()) {
dsamersoff@24828 1876 return true;
dsamersoff@24828 1877 }
coleenp@33602 1878 klass = klass->super();
dsamersoff@24828 1879 }
dsamersoff@24828 1880 return false;
dsamersoff@24828 1881 }
dsamersoff@24828 1882 #endif
dsamersoff@24828 1883
acorn@20391 1884 // lookup a method in the default methods list then in all transitive interfaces
acorn@20391 1885 // Do NOT return private or static methods
acorn@20391 1886 Method* InstanceKlass::lookup_method_in_ordered_interfaces(Symbol* name,
acorn@20391 1887 Symbol* signature) const {
acorn@20396 1888 Method* m = NULL;
acorn@20391 1889 if (default_methods() != NULL) {
acorn@20391 1890 m = find_method(default_methods(), name, signature);
acorn@20391 1891 }
acorn@20391 1892 // Look up interfaces
acorn@20391 1893 if (m == NULL) {
lfoltan@28731 1894 m = lookup_method_in_all_interfaces(name, signature, find_defaults);
acorn@20391 1895 }
acorn@20391 1896 return m;
acorn@20391 1897 }
acorn@20391 1898
duke@1 1899 // lookup a method in all the interfaces that this class implements
acorn@20284 1900 // Do NOT return private or static methods, new in JDK8 which are not externally visible
acorn@20284 1901 // They should only be found in the initial InterfaceMethodRef
coleenp@13728 1902 Method* InstanceKlass::lookup_method_in_all_interfaces(Symbol* name,
hseigel@22232 1903 Symbol* signature,
lfoltan@28731 1904 DefaultsLookupMode defaults_mode) const {
iklam@51329 1905 Array<InstanceKlass*>* all_ifs = transitive_interfaces();
duke@1 1906 int num_ifs = all_ifs->length();
coleenp@13728 1907 InstanceKlass *ik = NULL;
duke@1 1908 for (int i = 0; i < num_ifs; i++) {
iklam@51329 1909 ik = all_ifs->at(i);
coleenp@13728 1910 Method* m = ik->lookup_method(name, signature);
hseigel@22232 1911 if (m != NULL && m->is_public() && !m->is_static() &&
lfoltan@28731 1912 ((defaults_mode != skip_defaults) || !m->is_default_method())) {
duke@1 1913 return m;
duke@1 1914 }
duke@1 1915 }
duke@1 1916 return NULL;
duke@1 1917 }
duke@1 1918
duke@1 1919 /* jni_id_for_impl for jfieldIds only */
hseigel@46341 1920 JNIid* InstanceKlass::jni_id_for_impl(int offset) {
duke@1 1921 MutexLocker ml(JfieldIdCreation_lock);
duke@1 1922 // Retry lookup after we got the lock
hseigel@46341 1923 JNIid* probe = jni_ids() == NULL ? NULL : jni_ids()->find(offset);
duke@1 1924 if (probe == NULL) {
duke@1 1925 // Slow case, allocate new static field identifier
hseigel@46341 1926 probe = new JNIid(this, offset, jni_ids());
hseigel@46341 1927 set_jni_ids(probe);
duke@1 1928 }
duke@1 1929 return probe;
duke@1 1930 }
duke@1 1931
duke@1 1932
duke@1 1933 /* jni_id_for for jfieldIds only */
coleenp@13728 1934 JNIid* InstanceKlass::jni_id_for(int offset) {
duke@1 1935 JNIid* probe = jni_ids() == NULL ? NULL : jni_ids()->find(offset);
duke@1 1936 if (probe == NULL) {
hseigel@46341 1937 probe = jni_id_for_impl(offset);
duke@1 1938 }
duke@1 1939 return probe;
duke@1 1940 }
duke@1 1941
mgronlun@34666 1942 u2 InstanceKlass::enclosing_method_data(int offset) const {
mgronlun@34666 1943 const Array<jushort>* const inner_class_list = inner_classes();
jiangli@12231 1944 if (inner_class_list == NULL) {
jiangli@12231 1945 return 0;
jiangli@12231 1946 }
mgronlun@34666 1947 const int length = inner_class_list->length();
jiangli@12231 1948 if (length % inner_class_next_offset == 0) {
jiangli@12231 1949 return 0;
jiangli@12231 1950 }
mgronlun@34666 1951 const int index = length - enclosing_method_attribute_size;
mgronlun@34666 1952 assert(offset < enclosing_method_attribute_size, "invalid offset");
mgronlun@34666 1953 return inner_class_list->at(index + offset);
jiangli@12231 1954 }
jiangli@12231 1955
coleenp@13728 1956 void InstanceKlass::set_enclosing_method_indices(u2 class_index,
jiangli@12231 1957 u2 method_index) {
coleenp@13728 1958 Array<jushort>* inner_class_list = inner_classes();
jiangli@12231 1959 assert (inner_class_list != NULL, "_inner_classes list is not set up");
jiangli@12231 1960 int length = inner_class_list->length();
jiangli@12231 1961 if (length % inner_class_next_offset == enclosing_method_attribute_size) {
jiangli@12231 1962 int index = length - enclosing_method_attribute_size;
coleenp@13728 1963 inner_class_list->at_put(
jiangli@12231 1964 index + enclosing_method_class_index_offset, class_index);
coleenp@13728 1965 inner_class_list->at_put(
jiangli@12231 1966 index + enclosing_method_method_index_offset, method_index);
jiangli@12231 1967 }
jiangli@12231 1968 }
duke@1 1969
duke@1 1970 // Lookup or create a jmethodID.
dcubed@3824 1971 // This code is called by the VMThread and JavaThreads so the
dcubed@3824 1972 // locking has to be done very carefully to avoid deadlocks
dcubed@3824 1973 // and/or other cache consistency problems.
dcubed@3824 1974 //
hseigel@46341 1975 jmethodID InstanceKlass::get_jmethod_id(const methodHandle& method_h) {
duke@1 1976 size_t idnum = (size_t)method_h->method_idnum();
hseigel@46341 1977 jmethodID* jmeths = methods_jmethod_ids_acquire();
duke@1 1978 size_t length = 0;
duke@1 1979 jmethodID id = NULL;
dcubed@3824 1980
dcubed@3824 1981 // We use a double-check locking idiom here because this cache is
dcubed@3824 1982 // performance sensitive. In the normal system, this cache only
dcubed@3824 1983 // transitions from NULL to non-NULL which is safe because we use
dcubed@3824 1984 // release_set_methods_jmethod_ids() to advertise the new cache.
dcubed@3824 1985 // A partially constructed cache should never be seen by a racing
coleenp@47634 1986 // thread. We also use release_store() to save a new jmethodID
dcubed@3824 1987 // in the cache so a partially constructed jmethodID should never be
dcubed@3824 1988 // seen either. Cache reads of existing jmethodIDs proceed without a
dcubed@3824 1989 // lock, but cache writes of a new jmethodID requires uniqueness and
dcubed@3824 1990 // creation of the cache itself requires no leaks so a lock is
dcubed@3824 1991 // generally acquired in those two cases.
dcubed@3824 1992 //
dcubed@3824 1993 // If the RedefineClasses() API has been used, then this cache can
dcubed@3824 1994 // grow and we'll have transitions from non-NULL to bigger non-NULL.
dcubed@3824 1995 // Cache creation requires no leaks and we require safety between all
dcubed@3824 1996 // cache accesses and freeing of the old cache so a lock is generally
dcubed@3824 1997 // acquired when the RedefineClasses() API has been used.
duke@1 1998
dcubed@3824 1999 if (jmeths != NULL) {
dcubed@3824 2000 // the cache already exists
hseigel@46341 2001 if (!idnum_can_increment()) {
dcubed@3824 2002 // the cache can't grow so we can just get the current values
dcubed@3824 2003 get_jmethod_id_length_value(jmeths, idnum, &length, &id);
dcubed@3824 2004 } else {
dcubed@3824 2005 // cache can grow so we have to be more careful
dcubed@3824 2006 if (Threads::number_of_threads() == 0 ||
dcubed@3824 2007 SafepointSynchronize::is_at_safepoint()) {
dcubed@3824 2008 // we're single threaded or at a safepoint - no locking needed
dcubed@3824 2009 get_jmethod_id_length_value(jmeths, idnum, &length, &id);
dcubed@3824 2010 } else {
coleenp@57171 2011 MutexLocker ml(JmethodIdCreation_lock, Mutex::_no_safepoint_check_flag);
dcubed@3824 2012 get_jmethod_id_length_value(jmeths, idnum, &length, &id);
dcubed@3824 2013 }
dcubed@3824 2014 }
dcubed@3824 2015 }
dcubed@3824 2016 // implied else:
dcubed@3824 2017 // we need to allocate a cache so default length and id values are good
duke@1 2018
dcubed@3824 2019 if (jmeths == NULL || // no cache yet
dcubed@3824 2020 length <= idnum || // cache is too short
dcubed@3824 2021 id == NULL) { // cache doesn't contain entry
dcubed@3824 2022
dcubed@3824 2023 // This function can be called by the VMThread so we have to do all
dcubed@3824 2024 // things that might block on a safepoint before grabbing the lock.
dcubed@3824 2025 // Otherwise, we can deadlock with the VMThread or have a cache
dcubed@3824 2026 // consistency issue. These vars keep track of what we might have
dcubed@3824 2027 // to free after the lock is dropped.
dcubed@3824 2028 jmethodID to_dealloc_id = NULL;
dcubed@3824 2029 jmethodID* to_dealloc_jmeths = NULL;
dcubed@3824 2030
dcubed@3824 2031 // may not allocate new_jmeths or use it if we allocate it
duke@1 2032 jmethodID* new_jmeths = NULL;
duke@1 2033 if (length <= idnum) {
dcubed@3824 2034 // allocate a new cache that might be used
hseigel@46341 2035 size_t size = MAX2(idnum+1, (size_t)idnum_allocated_count());
zgu@13195 2036 new_jmeths = NEW_C_HEAP_ARRAY(jmethodID, size+1, mtClass);
duke@1 2037 memset(new_jmeths, 0, (size+1)*sizeof(jmethodID));
dcubed@3824 2038 // cache size is stored in element[0], other elements offset by one
dcubed@3824 2039 new_jmeths[0] = (jmethodID)size;
duke@1 2040 }
duke@1 2041
dcubed@3824 2042 // allocate a new jmethodID that might be used
duke@1 2043 jmethodID new_id = NULL;
duke@1 2044 if (method_h->is_old() && !method_h->is_obsolete()) {
duke@1 2045 // The method passed in is old (but not obsolete), we need to use the current version
hseigel@46341 2046 Method* current_method = method_with_idnum((int)idnum);
duke@1 2047 assert(current_method != NULL, "old and but not obsolete, so should exist");
hseigel@46341 2048 new_id = Method::make_jmethod_id(class_loader_data(), current_method);
duke@1 2049 } else {
duke@1 2050 // It is the current version of the method or an obsolete method,
duke@1 2051 // use the version passed in
hseigel@46341 2052 new_id = Method::make_jmethod_id(class_loader_data(), method_h());
duke@1 2053 }
duke@1 2054
dcubed@3824 2055 if (Threads::number_of_threads() == 0 ||
dcubed@3824 2056 SafepointSynchronize::is_at_safepoint()) {
dcubed@3824 2057 // we're single threaded or at a safepoint - no locking needed
hseigel@46341 2058 id = get_jmethod_id_fetch_or_update(idnum, new_id, new_jmeths,
dcubed@3824 2059 &to_dealloc_id, &to_dealloc_jmeths);
dcubed@222 2060 } else {
coleenp@57171 2061 MutexLocker ml(JmethodIdCreation_lock, Mutex::_no_safepoint_check_flag);
hseigel@46341 2062 id = get_jmethod_id_fetch_or_update(idnum, new_id, new_jmeths,
dcubed@3824 2063 &to_dealloc_id, &to_dealloc_jmeths);
dcubed@3824 2064 }
dcubed@3824 2065
dcubed@3824 2066 // The lock has been dropped so we can free resources.
dcubed@3824 2067 // Free up either the old cache or the new cache if we allocated one.
dcubed@3824 2068 if (to_dealloc_jmeths != NULL) {
dcubed@3824 2069 FreeHeap(to_dealloc_jmeths);
dcubed@3824 2070 }
dcubed@3824 2071 // free up the new ID since it wasn't needed
dcubed@3824 2072 if (to_dealloc_id != NULL) {
hseigel@46341 2073 Method::destroy_jmethod_id(class_loader_data(), to_dealloc_id);
dcubed@222 2074 }
dcubed@222 2075 }
dcubed@222 2076 return id;
dcubed@222 2077 }
duke@1 2078
jmanson@27478 2079 // Figure out how many jmethodIDs haven't been allocated, and make
jmanson@27478 2080 // sure space for them is pre-allocated. This makes getting all
jmanson@27478 2081 // method ids much, much faster with classes with more than 8
jmanson@27478 2082 // methods, and has a *substantial* effect on performance with jvmti
jmanson@27478 2083 // code that loads all jmethodIDs for all classes.
jmanson@27478 2084 void InstanceKlass::ensure_space_for_methodids(int start_offset) {
jmanson@27478 2085 int new_jmeths = 0;
jmanson@27478 2086 int length = methods()->length();
jmanson@27478 2087 for (int index = start_offset; index < length; index++) {
jmanson@27478 2088 Method* m = methods()->at(index);
jmanson@27478 2089 jmethodID id = m->find_jmethod_id_or_null();
jmanson@27478 2090 if (id == NULL) {
jmanson@27478 2091 new_jmeths++;
jmanson@27478 2092 }
jmanson@27478 2093 }
jmanson@27478 2094 if (new_jmeths != 0) {
jmanson@27478 2095 Method::ensure_jmethod_ids(class_loader_data(), new_jmeths);
jmanson@27478 2096 }
jmanson@27478 2097 }
dcubed@222 2098
dcubed@3824 2099 // Common code to fetch the jmethodID from the cache or update the
dcubed@3824 2100 // cache with the new jmethodID. This function should never do anything
dcubed@3824 2101 // that causes the caller to go to a safepoint or we can deadlock with
dcubed@3824 2102 // the VMThread or have cache consistency issues.
dcubed@3824 2103 //
coleenp@13728 2104 jmethodID InstanceKlass::get_jmethod_id_fetch_or_update(
hseigel@46341 2105 size_t idnum, jmethodID new_id,
dcubed@3824 2106 jmethodID* new_jmeths, jmethodID* to_dealloc_id_p,
dcubed@3824 2107 jmethodID** to_dealloc_jmeths_p) {
dcubed@3824 2108 assert(new_id != NULL, "sanity check");
dcubed@3824 2109 assert(to_dealloc_id_p != NULL, "sanity check");
dcubed@3824 2110 assert(to_dealloc_jmeths_p != NULL, "sanity check");
dcubed@3824 2111 assert(Threads::number_of_threads() == 0 ||
dcubed@3824 2112 SafepointSynchronize::is_at_safepoint() ||
dcubed@3824 2113 JmethodIdCreation_lock->owned_by_self(), "sanity check");
dcubed@3824 2114
dcubed@3824 2115 // reacquire the cache - we are locked, single threaded or at a safepoint
hseigel@46341 2116 jmethodID* jmeths = methods_jmethod_ids_acquire();
dcubed@3824 2117 jmethodID id = NULL;
dcubed@3824 2118 size_t length = 0;
duke@1 2119
dcubed@3824 2120 if (jmeths == NULL || // no cache yet
dcubed@3824 2121 (length = (size_t)jmeths[0]) <= idnum) { // cache is too short
dcubed@222 2122 if (jmeths != NULL) {
dcubed@3824 2123 // copy any existing entries from the old cache
dcubed@222 2124 for (size_t index = 0; index < length; index++) {
dcubed@222 2125 new_jmeths[index+1] = jmeths[index+1];
duke@1 2126 }
dcubed@3824 2127 *to_dealloc_jmeths_p = jmeths; // save old cache for later delete
duke@1 2128 }
hseigel@46341 2129 release_set_methods_jmethod_ids(jmeths = new_jmeths);
dcubed@222 2130 } else {
dcubed@3824 2131 // fetch jmethodID (if any) from the existing cache
dcubed@222 2132 id = jmeths[idnum+1];
dcubed@3824 2133 *to_dealloc_jmeths_p = new_jmeths; // save new cache for later delete
dcubed@222 2134 }
dcubed@222 2135 if (id == NULL) {
dcubed@3824 2136 // No matching jmethodID in the existing cache or we have a new
dcubed@3824 2137 // cache or we just grew the cache. This cache write is done here
dcubed@3824 2138 // by the first thread to win the foot race because a jmethodID
dcubed@3824 2139 // needs to be unique once it is generally available.
dcubed@222 2140 id = new_id;
dcubed@3824 2141
dcubed@3824 2142 // The jmethodID cache can be read while unlocked so we have to
dcubed@3824 2143 // make sure the new jmethodID is complete before installing it
dcubed@3824 2144 // in the cache.
stefank@57083 2145 Atomic::release_store(&jmeths[idnum+1], id);
dcubed@222 2146 } else {
dcubed@3824 2147 *to_dealloc_id_p = new_id; // save new id for later delete
duke@1 2148 }
duke@1 2149 return id;
duke@1 2150 }
duke@1 2151
duke@1 2152
dcubed@3824 2153 // Common code to get the jmethodID cache length and the jmethodID
dcubed@3824 2154 // value at index idnum if there is one.
dcubed@3824 2155 //
coleenp@13728 2156 void InstanceKlass::get_jmethod_id_length_value(jmethodID* cache,
dcubed@3824 2157 size_t idnum, size_t *length_p, jmethodID* id_p) {
dcubed@3824 2158 assert(cache != NULL, "sanity check");
dcubed@3824 2159 assert(length_p != NULL, "sanity check");
dcubed@3824 2160 assert(id_p != NULL, "sanity check");
dcubed@3824 2161
dcubed@3824 2162 // cache size is stored in element[0], other elements offset by one
dcubed@3824 2163 *length_p = (size_t)cache[0];
dcubed@3824 2164 if (*length_p <= idnum) { // cache is too short
dcubed@3824 2165 *id_p = NULL;
dcubed@3824 2166 } else {
dcubed@3824 2167 *id_p = cache[idnum+1]; // fetch jmethodID (if any)
dcubed@3824 2168 }
dcubed@3824 2169 }
dcubed@3824 2170
dcubed@3824 2171
duke@1 2172 // Lookup a jmethodID, NULL if not found. Do no blocking, no allocations, no handles
coleenp@13728 2173 jmethodID InstanceKlass::jmethod_id_or_null(Method* method) {
duke@1 2174 size_t idnum = (size_t)method->method_idnum();
duke@1 2175 jmethodID* jmeths = methods_jmethod_ids_acquire();
duke@1 2176 size_t length; // length assigned as debugging crumb
duke@1 2177 jmethodID id = NULL;
dcubed@3824 2178 if (jmeths != NULL && // If there is a cache
duke@1 2179 (length = (size_t)jmeths[0]) > idnum) { // and if it is long enough,
duke@1 2180 id = jmeths[idnum+1]; // Look up the id (may be NULL)
duke@1 2181 }
duke@1 2182 return id;
duke@1 2183 }
duke@1 2184
vlivanov@34195 2185 inline DependencyContext InstanceKlass::dependencies() {
eosterlund@52781 2186 DependencyContext dep_context(&_dep_context, &_dep_context_last_cleaned);
vlivanov@34195 2187 return dep_context;
vlivanov@31037 2188 }
vlivanov@31037 2189
vlivanov@36300 2190 int InstanceKlass::mark_dependent_nmethods(KlassDepChange& changes) {
vlivanov@34195 2191 return dependencies().mark_dependent_nmethods(changes);
stefank@25492 2192 }
duke@1 2193
coleenp@13728 2194 void InstanceKlass::add_dependent_nmethod(nmethod* nm) {
vlivanov@34195 2195 dependencies().add_dependent_nmethod(nm);
duke@1 2196 }
duke@1 2197
eosterlund@52781 2198 void InstanceKlass::remove_dependent_nmethod(nmethod* nm) {
eosterlund@52781 2199 dependencies().remove_dependent_nmethod(nm);
eosterlund@52781 2200 }
eosterlund@52781 2201
eosterlund@52781 2202 void InstanceKlass::clean_dependency_context() {
eosterlund@52781 2203 dependencies().clean_unloading_dependents();
duke@1 2204 }
duke@1 2205
duke@1 2206 #ifndef PRODUCT
coleenp@13728 2207 void InstanceKlass::print_dependent_nmethods(bool verbose) {
vlivanov@34195 2208 dependencies().print_dependent_nmethods(verbose);
duke@1 2209 }
duke@1 2210
coleenp@13728 2211 bool InstanceKlass::is_dependent_nmethod(nmethod* nm) {
vlivanov@34195 2212 return dependencies().is_dependent_nmethod(nm);
duke@1 2213 }
duke@1 2214 #endif //PRODUCT
duke@1 2215
coleenp@49821 2216 void InstanceKlass::clean_weak_instanceklass_links() {
coleenp@49821 2217 clean_implementors_list();
coleenp@49821 2218 clean_method_data();
stefank@33576 2219 }
stefank@33576 2220
coleenp@49821 2221 void InstanceKlass::clean_implementors_list() {
coleenp@49821 2222 assert(is_loader_alive(), "this klass should be live");
jiangli@12369 2223 if (is_interface()) {
eosterlund@52784 2224 assert (ClassUnloading, "only called for ClassUnloading");
eosterlund@52784 2225 for (;;) {
eosterlund@52784 2226 // Use load_acquire due to competing with inserts
stefank@57083 2227 Klass* impl = Atomic::load_acquire(adr_implementor());
eosterlund@52784 2228 if (impl != NULL && !impl->is_loader_alive()) {
eosterlund@52784 2229 // NULL this field, might be an unloaded klass or NULL
eosterlund@52784 2230 Klass* volatile* klass = adr_implementor();
stefank@57088 2231 if (Atomic::cmpxchg(klass, impl, (Klass*)NULL) == impl) {
eosterlund@52784 2232 // Successfully unlinking implementor.
eosterlund@52784 2233 if (log_is_enabled(Trace, class, unload)) {
eosterlund@52784 2234 ResourceMark rm;
eosterlund@52784 2235 log_trace(class, unload)("unlinking class (implementor): %s", impl->external_name());
coleenp@52356 2236 }
eosterlund@52784 2237 return;
coleenp@52356 2238 }
eosterlund@52784 2239 } else {
eosterlund@52784 2240 return;
coleenp@52356 2241 }
coleenp@13728 2242 }
coleenp@13728 2243 }
coleenp@13728 2244 }
coleenp@13728 2245
coleenp@49821 2246 void InstanceKlass::clean_method_data() {
coleenp@13728 2247 for (int m = 0; m < methods()->length(); m++) {
coleenp@13728 2248 MethodData* mdo = methods()->at(m)->method_data();
coleenp@13728 2249 if (mdo != NULL) {
coleenp@54623 2250 MutexLocker ml(SafepointSynchronize::is_at_safepoint() ? NULL : mdo->extra_data_lock());
coleenp@49821 2251 mdo->clean_method_data(/*always_clean*/false);
duke@1 2252 }
duke@1 2253 }
coleenp@13728 2254 }
coleenp@13728 2255
kvn@42650 2256 bool InstanceKlass::supers_have_passed_fingerprint_checks() {
kvn@42650 2257 if (java_super() != NULL && !java_super()->has_passed_fingerprint_check()) {
kvn@42650 2258 ResourceMark rm;
kvn@42650 2259 log_trace(class, fingerprint)("%s : super %s not fingerprinted", external_name(), java_super()->external_name());
kvn@42650 2260 return false;
kvn@42650 2261 }
kvn@42650 2262
iklam@51329 2263 Array<InstanceKlass*>* local_interfaces = this->local_interfaces();
kvn@42650 2264 if (local_interfaces != NULL) {
kvn@42650 2265 int length = local_interfaces->length();
kvn@42650 2266 for (int i = 0; i < length; i++) {
iklam@51329 2267 InstanceKlass* intf = local_interfaces->at(i);
kvn@42650 2268 if (!intf->has_passed_fingerprint_check()) {
kvn@42650 2269 ResourceMark rm;
kvn@42650 2270 log_trace(class, fingerprint)("%s : interface %s not fingerprinted", external_name(), intf->external_name());
kvn@42650 2271 return false;
kvn@42650 2272 }
kvn@42650 2273 }
kvn@42650 2274 }
kvn@42650 2275
kvn@42650 2276 return true;
kvn@42650 2277 }
kvn@42650 2278
lfoltan@51444 2279 bool InstanceKlass::should_store_fingerprint(bool is_unsafe_anonymous) {
kvn@42650 2280 #if INCLUDE_AOT
kvn@42650 2281 // We store the fingerprint into the InstanceKlass only in the following 2 cases:
kvn@46553 2282 if (CalculateClassFingerprint) {
kvn@42650 2283 // (1) We are running AOT to generate a shared library.
kvn@42650 2284 return true;
kvn@42650 2285 }
ccheung@56468 2286 if (Arguments::is_dumping_archive()) {
ccheung@54927 2287 // (2) We are running -Xshare:dump or -XX:ArchiveClassesAtExit to create a shared archive
kvn@42650 2288 return true;
kvn@42650 2289 }
lfoltan@51444 2290 if (UseAOT && is_unsafe_anonymous) {
lfoltan@51444 2291 // (3) We are using AOT code from a shared library and see an unsafe anonymous class
dlong@47668 2292 return true;
dlong@47668 2293 }
kvn@42650 2294 #endif
kvn@42650 2295
kvn@42650 2296 // In all other cases we might set the _misc_has_passed_fingerprint_check bit,
kvn@42650 2297 // but do not store the 64-bit fingerprint to save space.
kvn@42650 2298 return false;
kvn@42650 2299 }
kvn@42650 2300
kvn@42650 2301 bool InstanceKlass::has_stored_fingerprint() const {
kvn@42650 2302 #if INCLUDE_AOT
kvn@42650 2303 return should_store_fingerprint() || is_shared();
kvn@42650 2304 #else
kvn@42650 2305 return false;
kvn@42650 2306 #endif
kvn@42650 2307 }
kvn@42650 2308
kvn@42650 2309 uint64_t InstanceKlass::get_stored_fingerprint() const {
kvn@42650 2310 address adr = adr_fingerprint();
kvn@42650 2311 if (adr != NULL) {
kvn@42650 2312 return (uint64_t)Bytes::get_native_u8(adr); // adr may not be 64-bit aligned
kvn@42650 2313 }
kvn@42650 2314 return 0;
kvn@42650 2315 }
kvn@42650 2316
kvn@42650 2317 void InstanceKlass::store_fingerprint(uint64_t fingerprint) {
kvn@42650 2318 address adr = adr_fingerprint();
kvn@42650 2319 if (adr != NULL) {
kvn@42650 2320 Bytes::put_native_u8(adr, (u8)fingerprint); // adr may not be 64-bit aligned
kvn@42650 2321
kvn@42650 2322 ResourceMark rm;
kvn@42650 2323 log_trace(class, fingerprint)("stored as " PTR64_FORMAT " for class %s", fingerprint, external_name());
kvn@42650 2324 }
kvn@42650 2325 }
coleenp@13728 2326
iklam@46746 2327 void InstanceKlass::metaspace_pointers_do(MetaspaceClosure* it) {
iklam@46746 2328 Klass::metaspace_pointers_do(it);
iklam@46746 2329
iklam@46746 2330 if (log_is_enabled(Trace, cds)) {
iklam@46746 2331 ResourceMark rm;
iklam@46746 2332 log_trace(cds)("Iter(InstanceKlass): %p (%s)", this, external_name());
iklam@46746 2333 }
iklam@46746 2334
iklam@46746 2335 it->push(&_annotations);
iklam@46746 2336 it->push((Klass**)&_array_klasses);
iklam@46746 2337 it->push(&_constants);
iklam@46746 2338 it->push(&_inner_classes);
iklam@46746 2339 it->push(&_array_name);
iklam@46746 2340 #if INCLUDE_JVMTI
iklam@46746 2341 it->push(&_previous_versions);
iklam@46746 2342 #endif
iklam@46746 2343 it->push(&_methods);
iklam@46746 2344 it->push(&_default_methods);
iklam@46746 2345 it->push(&_local_interfaces);
iklam@46746 2346 it->push(&_transitive_interfaces);
iklam@46746 2347 it->push(&_method_ordering);
iklam@46746 2348 it->push(&_default_vtable_indices);
iklam@46746 2349 it->push(&_fields);
iklam@46746 2350
iklam@46746 2351 if (itable_length() > 0) {
iklam@46746 2352 itableOffsetEntry* ioe = (itableOffsetEntry*)start_of_itable();
iklam@46746 2353 int method_table_offset_in_words = ioe->offset()/wordSize;
iklam@46746 2354 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words())
iklam@46746 2355 / itableOffsetEntry::size();
iklam@46746 2356
iklam@46746 2357 for (int i = 0; i < nof_interfaces; i ++, ioe ++) {
iklam@46746 2358 if (ioe->interface_klass() != NULL) {
iklam@46746 2359 it->push(ioe->interface_klass_addr());
iklam@46746 2360 itableMethodEntry* ime = ioe->first_method_entry(this);
iklam@46746 2361 int n = klassItable::method_count_for_interface(ioe->interface_klass());
iklam@46746 2362 for (int index = 0; index < n; index ++) {
iklam@46746 2363 it->push(ime[index].method_addr());
iklam@46746 2364 }
iklam@46746 2365 }
iklam@46746 2366 }
iklam@46746 2367 }
dholmes@50735 2368
dholmes@50735 2369 it->push(&_nest_members);
vromero@57233 2370 it->push(&_record_components);
iklam@46746 2371 }
iklam@46746 2372
coleenp@13728 2373 void InstanceKlass::remove_unshareable_info() {
coleenp@13728 2374 Klass::remove_unshareable_info();
coleenp@46464 2375
ccheung@58266 2376 if (SystemDictionaryShared::has_class_failed_verification(this)) {
coleenp@46464 2377 // Classes are attempted to link during dumping and may fail,
coleenp@46464 2378 // but these classes are still in the dictionary and class list in CLD.
ccheung@58266 2379 // If the class has failed verification, there is nothing else to remove.
coleenp@46464 2380 return;
coleenp@46464 2381 }
coleenp@46464 2382
jiangli@51962 2383 // Reset to the 'allocated' state to prevent any premature accessing to
jiangli@51962 2384 // a shared class at runtime while the class is still being loaded and
jiangli@51962 2385 // restored. A class' init_state is set to 'loaded' at runtime when it's
jiangli@51962 2386 // being added to class hierarchy (see SystemDictionary:::add_to_hierarchy()).
jiangli@51962 2387 _init_state = allocated;
jiangli@51962 2388
coleenp@56445 2389 { // Otherwise this needs to take out the Compile_lock.
coleenp@56445 2390 assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
coleenp@51379 2391 init_implementor();
coleenp@51379 2392 }
coleenp@13728 2393
coleenp@13728 2394 constants()->remove_unshareable_info();
coleenp@13728 2395
coleenp@13728 2396 for (int i = 0; i < methods()->length(); i++) {
coleenp@13728 2397 Method* m = methods()->at(i);
coleenp@13728 2398 m->remove_unshareable_info();
coleenp@13728 2399 }
iklam@46746 2400
ccheung@47103 2401 // do array classes also.
ccheung@47103 2402 if (array_klasses() != NULL) {
ccheung@47103 2403 array_klasses()->remove_unshareable_info();
ccheung@47103 2404 }
ccheung@47103 2405
ccheung@54927 2406 // These are not allocated from metaspace. They are safe to set to NULL.
ccheung@54927 2407 _source_debug_extension = NULL;
ccheung@54927 2408 _dep_context = NULL;
ccheung@54927 2409 _osr_nmethods_head = NULL;
iklam@46746 2410 #if INCLUDE_JVMTI
ccheung@54927 2411 _breakpoints = NULL;
ccheung@54927 2412 _previous_versions = NULL;
iklam@53884 2413 _cached_class_file = NULL;
iklam@56936 2414 _jvmti_cached_class_field_map = NULL;
iklam@46746 2415 #endif
ccheung@47103 2416
dholmes@50735 2417 _init_thread = NULL;
dholmes@50735 2418 _methods_jmethod_ids = NULL;
dholmes@50735 2419 _jni_ids = NULL;
dholmes@50735 2420 _oop_map_cache = NULL;
dholmes@50735 2421 // clear _nest_host to ensure re-load at runtime
dholmes@50735 2422 _nest_host = NULL;
iklam@56936 2423 _package_entry = NULL;
iklam@56936 2424 _dep_context_last_cleaned = 0;
duke@1 2425 }
duke@1 2426
ccheung@47103 2427 void InstanceKlass::remove_java_mirror() {
ccheung@47103 2428 Klass::remove_java_mirror();
ccheung@47103 2429
ccheung@47103 2430 // do array classes also.
ccheung@47103 2431 if (array_klasses() != NULL) {
ccheung@47103 2432 array_klasses()->remove_java_mirror();
ccheung@47103 2433 }
duke@1 2434 }
duke@1 2435
ccheung@58673 2436 void InstanceKlass::restore_unshareable_info(ClassLoaderData* loader_data, Handle protection_domain,
ccheung@58673 2437 PackageEntry* pkg_entry, TRAPS) {
jiangli@51962 2438 // SystemDictionary::add_to_hierarchy() sets the init_state to loaded
jiangli@51962 2439 // before the InstanceKlass is added to the SystemDictionary. Make
jiangli@51962 2440 // sure the current state is <loaded.
jiangli@51962 2441 assert(!is_loaded(), "invalid init state");
ccheung@58673 2442 set_package(loader_data, pkg_entry, CHECK);
iklam@26135 2443 Klass::restore_unshareable_info(loader_data, protection_domain, CHECK);
coleenp@13728 2444
coleenp@46329 2445 Array<Method*>* methods = this->methods();
coleenp@13728 2446 int num_methods = methods->length();
redestad@53384 2447 for (int index = 0; index < num_methods; ++index) {
redestad@53384 2448 methods->at(index)->restore_unshareable_info(CHECK);
coleenp@13728 2449 }
coleenp@13728 2450 if (JvmtiExport::has_redefined_a_class()) {
coleenp@13728 2451 // Reinitialize vtable because RedefineClasses may have changed some
coleenp@13728 2452 // entries in this vtable for super classes so the CDS vtable might
coleenp@13728 2453 // point to old or obsolete entries. RedefineClasses doesn't fix up
coleenp@13728 2454 // vtables in the shared system dictionary, only the main one.
coleenp@13728 2455 // It also redefines the itable too so fix that too.
iklam@46408 2456 vtable().initialize_vtable(false, CHECK);
iklam@46408 2457 itable().initialize_itable(false, CHECK);
coleenp@13728 2458 }
coleenp@13728 2459
coleenp@13728 2460 // restore constant pool resolved references
coleenp@46329 2461 constants()->restore_unshareable_info(CHECK);
coleenp@46329 2462
ccheung@47103 2463 if (array_klasses() != NULL) {
ccheung@47103 2464 // Array classes have null protection domain.
ccheung@47103 2465 // --> see ArrayKlass::complete_create_array_klass()
ccheung@58673 2466 ArrayKlass::cast(array_klasses())->restore_unshareable_info(ClassLoaderData::the_null_class_loader_data(), Handle(), CHECK);
ccheung@47103 2467 }
coleenp@56724 2468
coleenp@56724 2469 // Initialize current biased locking state.
coleenp@56724 2470 if (UseBiasedLocking && BiasedLocking::enabled()) {
coleenp@56724 2471 set_prototype_header(markWord::biased_locking_prototype());
coleenp@56724 2472 }
coleenp@13728 2473 }
coleenp@13728 2474
iklam@58269 2475 void InstanceKlass::set_shared_class_loader_type(s2 loader_type) {
iklam@54347 2476 switch (loader_type) {
iklam@54347 2477 case ClassLoader::BOOT_LOADER:
iklam@54347 2478 _misc_flags |= _misc_is_shared_boot_class;
iklam@54347 2479 break;
iklam@54347 2480 case ClassLoader::PLATFORM_LOADER:
iklam@54347 2481 _misc_flags |= _misc_is_shared_platform_class;
iklam@54347 2482 break;
iklam@54347 2483 case ClassLoader::APP_LOADER:
iklam@54347 2484 _misc_flags |= _misc_is_shared_app_class;
iklam@54347 2485 break;
iklam@54347 2486 default:
iklam@54347 2487 ShouldNotReachHere();
iklam@54347 2488 break;
iklam@54347 2489 }
iklam@54347 2490 }
iklam@54347 2491
cjplummer@38059 2492 #if INCLUDE_JVMTI
coleenp@13728 2493 static void clear_all_breakpoints(Method* m) {
duke@1 2494 m->clear_all_breakpoints();
duke@1 2495 }
cjplummer@38059 2496 #endif
coleenp@17075 2497
coleenp@51887 2498 void InstanceKlass::unload_class(InstanceKlass* ik) {
coleenp@51887 2499 // Release dependencies.
coleenp@51887 2500 ik->dependencies().remove_all_dependents();
coleenp@51887 2501
coleenp@17075 2502 // notify the debugger
coleenp@17075 2503 if (JvmtiExport::should_post_class_unload()) {
coleenp@17075 2504 JvmtiExport::post_class_unload(ik);
coleenp@17075 2505 }
coleenp@17075 2506
coleenp@17075 2507 // notify ClassLoadingService of class unload
coleenp@17075 2508 ClassLoadingService::notify_class_unloaded(ik);
hseigel@51543 2509
ccheung@56468 2510 if (Arguments::is_dumping_archive()) {
ccheung@54927 2511 SystemDictionaryShared::remove_dumptime_info(ik);
ccheung@54927 2512 }
ccheung@54927 2513
coleenp@53738 2514 if (log_is_enabled(Info, class, unload)) {
coleenp@53738 2515 ResourceMark rm;
coleenp@53738 2516 log_info(class, unload)("unloading class %s " INTPTR_FORMAT, ik->external_name(), p2i(ik));
coleenp@53738 2517 }
coleenp@53738 2518
coleenp@53738 2519 Events::log_class_unloading(Thread::current(), ik);
coleenp@53738 2520
hseigel@51543 2521 #if INCLUDE_JFR
hseigel@51543 2522 assert(ik != NULL, "invariant");
hseigel@51543 2523 EventClassUnload event;
hseigel@51543 2524 event.set_unloadedClass(ik);
hseigel@51543 2525 event.set_definingClassLoader(ik->class_loader_data());
hseigel@51543 2526 event.commit();
hseigel@51543 2527 #endif
coleenp@17075 2528 }
coleenp@17075 2529
coleenp@56646 2530 static void method_release_C_heap_structures(Method* m) {
coleenp@56646 2531 m->release_C_heap_structures();
coleenp@56646 2532 }
coleenp@56646 2533
coleenp@17075 2534 void InstanceKlass::release_C_heap_structures(InstanceKlass* ik) {
coleenp@17075 2535 // Clean up C heap
coleenp@17075 2536 ik->release_C_heap_structures();
coleenp@17075 2537 ik->constants()->release_C_heap_structures();
coleenp@56646 2538
coleenp@56646 2539 // Deallocate and call destructors for MDO mutexes
coleenp@56646 2540 ik->methods_do(method_release_C_heap_structures);
coleenp@56646 2541
coleenp@17075 2542 }
coleenp@17075 2543
coleenp@13728 2544 void InstanceKlass::release_C_heap_structures() {
coleenp@17075 2545 // Can't release the constant pool here because the constant pool can be
coleenp@17075 2546 // deallocated separately from the InstanceKlass for default methods and
coleenp@17075 2547 // redefine classes.
coleenp@17075 2548
duke@1 2549 // Deallocate oop map cache
duke@1 2550 if (_oop_map_cache != NULL) {
duke@1 2551 delete _oop_map_cache;
duke@1 2552 _oop_map_cache = NULL;
duke@1 2553 }
duke@1 2554
duke@1 2555 // Deallocate JNI identifiers for jfieldIDs
duke@1 2556 JNIid::deallocate(jni_ids());
duke@1 2557 set_jni_ids(NULL);
duke@1 2558
duke@1 2559 jmethodID* jmeths = methods_jmethod_ids_acquire();
duke@1 2560 if (jmeths != (jmethodID*)NULL) {
duke@1 2561 release_set_methods_jmethod_ids(NULL);
duke@1 2562 FreeHeap(jmeths);
duke@1 2563 }
duke@1 2564
eosterlund@52781 2565 assert(_dep_context == NULL,
coleenp@51887 2566 "dependencies should already be cleaned");
duke@1 2567
cjplummer@38059 2568 #if INCLUDE_JVMTI
duke@1 2569 // Deallocate breakpoint records
duke@1 2570 if (breakpoints() != 0x0) {
duke@1 2571 methods_do(clear_all_breakpoints);
duke@1 2572 assert(breakpoints() == 0x0, "should have cleared breakpoints");
duke@1 2573 }
duke@1 2574
duke@1 2575 // deallocate the cached class file
iklam@53884 2576 if (_cached_class_file != NULL) {
coleenp@27880 2577 os::free(_cached_class_file);
jiangli@18940 2578 _cached_class_file = NULL;
duke@1 2579 }
cjplummer@38059 2580 #endif
coleenp@8076 2581
coleenp@8076 2582 // Decrement symbol reference counts associated with the unloaded class.
coleenp@8076 2583 if (_name != NULL) _name->decrement_refcount();
coleenp@8076 2584 // unreference array name derived from this class name (arrays of an unloaded
coleenp@8076 2585 // class can't be referenced anymore).
coleenp@8076 2586 if (_array_name != NULL) _array_name->decrement_refcount();
lkorinth@56237 2587 FREE_C_HEAP_ARRAY(char, _source_debug_extension);
coleenp@8076 2588 }
coleenp@8076 2589
mgronlun@34666 2590 void InstanceKlass::set_source_debug_extension(const char* array, int length) {
fparain@13201 2591 if (array == NULL) {
fparain@13201 2592 _source_debug_extension = NULL;
fparain@13201 2593 } else {
fparain@13201 2594 // Adding one to the attribute length in order to store a null terminator
fparain@13201 2595 // character could cause an overflow because the attribute length is
fparain@13201 2596 // already coded with an u4 in the classfile, but in practice, it's
fparain@13201 2597 // unlikely to happen.
fparain@13201 2598 assert((length+1) > length, "Overflow checking");
fparain@13201 2599 char* sde = NEW_C_HEAP_ARRAY(char, (length + 1), mtClass);
fparain@13201 2600 for (int i = 0; i < length; i++) {
fparain@13201 2601 sde[i] = array[i];
fparain@13201 2602 }
fparain@13201 2603 sde[length] = '\0';
fparain@13201 2604 _source_debug_extension = sde;
fparain@13201 2605 }
duke@1 2606 }
duke@1 2607
coleenp@13728 2608 const char* InstanceKlass::signature_name() const {
farvidsson@21183 2609 int hash_len = 0;
farvidsson@21183 2610 char hash_buf[40];
farvidsson@21183 2611
lfoltan@51444 2612 // If this is an unsafe anonymous class, append a hash to make the name unique
lfoltan@51444 2613 if (is_unsafe_anonymous()) {
farvidsson@21183 2614 intptr_t hash = (java_mirror() != NULL) ? java_mirror()->identity_hash() : 0;
goetz@27471 2615 jio_snprintf(hash_buf, sizeof(hash_buf), "/" UINTX_FORMAT, (uintx)hash);
farvidsson@21183 2616 hash_len = (int)strlen(hash_buf);
farvidsson@21183 2617 }
farvidsson@21183 2618
farvidsson@21183 2619 // Get the internal name as a c string
duke@1 2620 const char* src = (const char*) (name()->as_C_string());
duke@1 2621 const int src_length = (int)strlen(src);
farvidsson@21183 2622
farvidsson@21183 2623 char* dest = NEW_RESOURCE_ARRAY(char, src_length + hash_len + 3);
farvidsson@21183 2624
farvidsson@21183 2625 // Add L as type indicator
duke@1 2626 int dest_index = 0;
lfoltan@56680 2627 dest[dest_index++] = JVM_SIGNATURE_CLASS;
farvidsson@21183 2628
farvidsson@21183 2629 // Add the actual class name
farvidsson@21183 2630 for (int src_index = 0; src_index < src_length; ) {
duke@1 2631 dest[dest_index++] = src[src_index++];
duke@1 2632 }
farvidsson@21183 2633
farvidsson@21183 2634 // If we have a hash, append it
farvidsson@21183 2635 for (int hash_index = 0; hash_index < hash_len; ) {
farvidsson@21183 2636 dest[dest_index++] = hash_buf[hash_index++];
farvidsson@21183 2637 }
farvidsson@21183 2638
farvidsson@21183 2639 // Add the semicolon and the NULL
lfoltan@56680 2640 dest[dest_index++] = JVM_SIGNATURE_ENDCLASS;
duke@1 2641 dest[dest_index] = '\0';
duke@1 2642 return dest;
duke@1 2643 }
duke@1 2644
alanb@36508 2645 ModuleEntry* InstanceKlass::module() const {
lfoltan@51444 2646 // For an unsafe anonymous class return the host class' module
lfoltan@51444 2647 if (is_unsafe_anonymous()) {
lfoltan@51444 2648 assert(unsafe_anonymous_host() != NULL, "unsafe anonymous class must have a host class");
lfoltan@51444 2649 return unsafe_anonymous_host()->module();
lfoltan@51444 2650 }
lfoltan@51444 2651
lfoltan@51444 2652 // Class is in a named package
alanb@36508 2653 if (!in_unnamed_package()) {
alanb@36508 2654 return _package_entry->module();
alanb@36508 2655 }
lfoltan@51444 2656
lfoltan@51444 2657 // Class is in an unnamed package, return its loader's unnamed module
lfoltan@51444 2658 return class_loader_data()->unnamed_module();
alanb@36508 2659 }
alanb@36508 2660
ccheung@58673 2661 void InstanceKlass::set_package(ClassLoaderData* loader_data, PackageEntry* pkg_entry, TRAPS) {
acorn@40016 2662
acorn@40016 2663 // ensure java/ packages only loaded by boot or platform builtin loaders
lfoltan@50634 2664 check_prohibited_package(name(), loader_data, CHECK);
acorn@40016 2665
ccheung@58673 2666 TempNewSymbol pkg_name = pkg_entry != NULL ? pkg_entry->name() : ClassLoader::package_from_class_name(name());
rprotacio@39216 2667
rprotacio@39216 2668 if (pkg_name != NULL && loader_data != NULL) {
acorn@40016 2669
alanb@36508 2670 // Find in class loader's package entry table.
ccheung@58673 2671 _package_entry = pkg_entry != NULL ? pkg_entry : loader_data->packages()->lookup_only(pkg_name);
alanb@36508 2672
alanb@36508 2673 // If the package name is not found in the loader's package
alanb@36508 2674 // entry table, it is an indication that the package has not
alanb@36508 2675 // been defined. Consider it defined within the unnamed module.
alanb@36508 2676 if (_package_entry == NULL) {
alanb@36508 2677
alanb@36508 2678 if (!ModuleEntryTable::javabase_defined()) {
alanb@36508 2679 // Before java.base is defined during bootstrapping, define all packages in
alanb@36508 2680 // the java.base module. If a non-java.base package is erroneously placed
alanb@36508 2681 // in the java.base module it will be caught later when java.base
alanb@36508 2682 // is defined by ModuleEntryTable::verify_javabase_packages check.
rprotacio@42636 2683 assert(ModuleEntryTable::javabase_moduleEntry() != NULL, JAVA_BASE_NAME " module is NULL");
lfoltan@41183 2684 _package_entry = loader_data->packages()->lookup(pkg_name, ModuleEntryTable::javabase_moduleEntry());
alanb@36508 2685 } else {
rprotacio@46387 2686 assert(loader_data->unnamed_module() != NULL, "unnamed module is NULL");
alanb@36508 2687 _package_entry = loader_data->packages()->lookup(pkg_name,
rprotacio@46387 2688 loader_data->unnamed_module());
alanb@36508 2689 }
alanb@36508 2690
alanb@36508 2691 // A package should have been successfully created
ccheung@58673 2692 DEBUG_ONLY(ResourceMark rm(THREAD));
alanb@36508 2693 assert(_package_entry != NULL, "Package entry for class %s not found, loader %s",
lfoltan@50634 2694 name()->as_C_string(), loader_data->loader_name_and_id());
alanb@36508 2695 }
alanb@36508 2696
alanb@44993 2697 if (log_is_enabled(Debug, module)) {
iklam@57387 2698 ResourceMark rm(THREAD);
alanb@36508 2699 ModuleEntry* m = _package_entry->module();
alanb@44993 2700 log_trace(module)("Setting package: class: %s, package: %s, loader: %s, module: %s",
alanb@44993 2701 external_name(),
alanb@44993 2702 pkg_name->as_C_string(),
lfoltan@50634 2703 loader_data->loader_name_and_id(),
alanb@44993 2704 (m->is_named() ? m->name()->as_C_string() : UNNAMED_MODULE));
alanb@36508 2705 }
alanb@36508 2706 } else {
iklam@57387 2707 ResourceMark rm(THREAD);
alanb@44993 2708 log_trace(module)("Setting package: class: %s, package: unnamed, loader: %s, module: %s",
alanb@44993 2709 external_name(),
lfoltan@50634 2710 (loader_data != NULL) ? loader_data->loader_name_and_id() : "NULL",
alanb@44993 2711 UNNAMED_MODULE);
alanb@36508 2712 }
alanb@36508 2713 }
alanb@36508 2714
alanb@36508 2715
alanb@36508 2716 // different versions of is_same_class_package
alanb@36508 2717
mgronlun@34666 2718 bool InstanceKlass::is_same_class_package(const Klass* class2) const {
alanb@36508 2719 oop classloader1 = this->class_loader();
alanb@36508 2720 PackageEntry* classpkg1 = this->package();
coleenp@33611 2721 if (class2->is_objArray_klass()) {
coleenp@13952 2722 class2 = ObjArrayKlass::cast(class2)->bottom_klass();
duke@1 2723 }
alanb@36508 2724
mgronlun@34666 2725 oop classloader2;
alanb@36508 2726 PackageEntry* classpkg2;
mgronlun@34666 2727 if (class2->is_instance_klass()) {
alanb@36508 2728 classloader2 = class2->class_loader();
rprotacio@38094 2729 classpkg2 = class2->package();
mgronlun@34666 2730 } else {
mgronlun@34666 2731 assert(class2->is_typeArray_klass(), "should be type array");
mgronlun@34666 2732 classloader2 = NULL;
alanb@36508 2733 classpkg2 = NULL;
mgronlun@34666 2734 }
alanb@36508 2735
alanb@36508 2736 // Same package is determined by comparing class loader
alanb@36508 2737 // and package entries. Both must be the same. This rule
alanb@36508 2738 // applies even to classes that are defined in the unnamed
alanb@36508 2739 // package, they still must have the same class loader.
pliden@56286 2740 if ((classloader1 == classloader2) && (classpkg1 == classpkg2)) {
alanb@36508 2741 return true;
alanb@36508 2742 }
alanb@36508 2743
alanb@36508 2744 return false;
duke@1 2745 }
duke@1 2746
hseigel@46697 2747 // return true if this class and other_class are in the same package. Classloader
hseigel@46697 2748 // and classname information is enough to determine a class's package
mgronlun@34666 2749 bool InstanceKlass::is_same_class_package(oop other_class_loader,
mgronlun@34666 2750 const Symbol* other_class_name) const {
pliden@56286 2751 if (class_loader() != other_class_loader) {
duke@1 2752 return false;
hseigel@46697 2753 }
hseigel@46697 2754 if (name()->fast_compare(other_class_name) == 0) {
hseigel@46697 2755 return true;
hseigel@46697 2756 }
hseigel@46697 2757
hseigel@46697 2758 {
duke@1 2759 ResourceMark rm;
duke@1 2760
rprotacio@39216 2761 bool bad_class_name = false;
redestad@58528 2762 TempNewSymbol other_pkg = ClassLoader::package_from_class_name(other_class_name, &bad_class_name);
rprotacio@39216 2763 if (bad_class_name) {
alanb@36508 2764 return false;
alanb@36508 2765 }
redestad@58528 2766 // Check that package_from_class_name() returns NULL, not "", if there is no package.
redestad@58528 2767 assert(other_pkg == NULL || other_pkg->utf8_length() > 0, "package name is empty string");
hseigel@46697 2768
hseigel@46697 2769 const Symbol* const this_package_name =
hseigel@46697 2770 this->package() != NULL ? this->package()->name() : NULL;
hseigel@46697 2771
hseigel@46697 2772 if (this_package_name == NULL || other_pkg == NULL) {
hseigel@46697 2773 // One of the two doesn't have a package. Only return true if the other
hseigel@46697 2774 // one also doesn't have a package.
redestad@58528 2775 return this_package_name == other_pkg;
duke@1 2776 }
alanb@36508 2777
hseigel@46697 2778 // Check if package is identical
redestad@58528 2779 return this_package_name->fast_compare(other_pkg) == 0;
duke@1 2780 }
duke@1 2781 }
duke@1 2782
acorn@2264 2783 // Returns true iff super_method can be overridden by a method in targetclassname
rprotacio@39216 2784 // See JLS 3rd edition 8.4.6.1
acorn@2264 2785 // Assumes name-signature match
coleenp@13728 2786 // "this" is InstanceKlass of super_method which must exist
coleenp@13728 2787 // note that the InstanceKlass of the method in the targetclassname has not always been created yet
coleenp@33593 2788 bool InstanceKlass::is_override(const methodHandle& super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS) {
acorn@2264 2789 // Private methods can not be overridden
acorn@2264 2790 if (super_method->is_private()) {
acorn@2264 2791 return false;
acorn@2264 2792 }
acorn@2264 2793 // If super method is accessible, then override
acorn@2264 2794 if ((super_method->is_protected()) ||
acorn@2264 2795 (super_method->is_public())) {
acorn@2264 2796 return true;
acorn@2264 2797 }
acorn@2264 2798 // Package-private methods are not inherited outside of package
acorn@2264 2799 assert(super_method->is_package_private(), "must be package private");
coleenp@8076 2800 return(is_same_class_package(targetclassloader(), targetclassname));
acorn@2264 2801 }
duke@1 2802
acorn@40016 2803 // Only boot and platform class loaders can define classes in "java/" packages.
acorn@40016 2804 void InstanceKlass::check_prohibited_package(Symbol* class_name,
lfoltan@50634 2805 ClassLoaderData* loader_data,
alanb@42307 2806 TRAPS) {
lfoltan@50634 2807 if (!loader_data->is_boot_class_loader_data() &&
lfoltan@50634 2808 !loader_data->is_platform_class_loader_data() &&
alanb@44326 2809 class_name != NULL) {
alanb@44326 2810 ResourceMark rm(THREAD);
alanb@44326 2811 char* name = class_name->as_C_string();
alanb@44326 2812 if (strncmp(name, JAVAPKG, JAVAPKG_LEN) == 0 && name[JAVAPKG_LEN] == '/') {
redestad@58528 2813 TempNewSymbol pkg_name = ClassLoader::package_from_class_name(class_name);
alanb@44326 2814 assert(pkg_name != NULL, "Error in parsing package name starting with 'java/'");
alanb@44326 2815 name = pkg_name->as_C_string();
lfoltan@50634 2816 const char* class_loader_name = loader_data->loader_name_and_id();
alanb@44326 2817 StringUtils::replace_no_expand(name, "/", ".");
alanb@44326 2818 const char* msg_text1 = "Class loader (instance of): ";
alanb@44326 2819 const char* msg_text2 = " tried to load prohibited package name: ";
alanb@44326 2820 size_t len = strlen(msg_text1) + strlen(class_loader_name) + strlen(msg_text2) + strlen(name) + 1;
alanb@44326 2821 char* message = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, len);
alanb@44326 2822 jio_snprintf(message, len, "%s%s%s%s", msg_text1, class_loader_name, msg_text2, name);
alanb@44326 2823 THROW_MSG(vmSymbols::java_lang_SecurityException(), message);
alanb@44326 2824 }
acorn@40016 2825 }
acorn@40016 2826 return;
acorn@40016 2827 }
acorn@40016 2828
hseigel@46341 2829 bool InstanceKlass::find_inner_classes_attr(int* ooff, int* noff, TRAPS) const {
hseigel@46341 2830 constantPoolHandle i_cp(THREAD, constants());
hseigel@46341 2831 for (InnerClassesIterator iter(this); !iter.done(); iter.next()) {
vlivanov@30222 2832 int ioff = iter.inner_class_info_index();
vlivanov@30222 2833 if (ioff != 0) {
vlivanov@30222 2834 // Check to see if the name matches the class we're looking for
vlivanov@30222 2835 // before attempting to find the class.
hseigel@46341 2836 if (i_cp->klass_name_at_matches(this, ioff)) {
vlivanov@30222 2837 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_false);
hseigel@46341 2838 if (this == inner_klass) {
vlivanov@30222 2839 *ooff = iter.outer_class_info_index();
vlivanov@30222 2840 *noff = iter.inner_name_index();
vlivanov@30222 2841 return true;
vlivanov@30222 2842 }
vlivanov@30222 2843 }
vlivanov@30222 2844 }
vlivanov@30222 2845 }
vlivanov@30222 2846 return false;
vlivanov@30222 2847 }
vlivanov@30222 2848
hseigel@46341 2849 InstanceKlass* InstanceKlass::compute_enclosing_class(bool* inner_is_member, TRAPS) const {
mgronlun@34666 2850 InstanceKlass* outer_klass = NULL;
vlivanov@30222 2851 *inner_is_member = false;
vlivanov@30222 2852 int ooff = 0, noff = 0;
hseigel@46341 2853 bool has_inner_classes_attr = find_inner_classes_attr(&ooff, &noff, THREAD);
hseigel@46341 2854 if (has_inner_classes_attr) {
hseigel@46341 2855 constantPoolHandle i_cp(THREAD, constants());
vlivanov@30222 2856 if (ooff != 0) {
vlivanov@30222 2857 Klass* ok = i_cp->klass_at(ooff, CHECK_NULL);
mgronlun@34666 2858 outer_klass = InstanceKlass::cast(ok);
vlivanov@30222 2859 *inner_is_member = true;
vlivanov@30222 2860 }
mgronlun@34666 2861 if (NULL == outer_klass) {
lfoltan@51444 2862 // It may be unsafe anonymous; try for that.
hseigel@46341 2863 int encl_method_class_idx = enclosing_method_class_index();
vlivanov@30222 2864 if (encl_method_class_idx != 0) {
vlivanov@30222 2865 Klass* ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
mgronlun@34666 2866 outer_klass = InstanceKlass::cast(ok);
vlivanov@30222 2867 *inner_is_member = false;
vlivanov@30222 2868 }
vlivanov@30222 2869 }
vlivanov@30222 2870 }
vlivanov@30222 2871
vlivanov@30222 2872 // If no inner class attribute found for this class.
mgronlun@34666 2873 if (NULL == outer_klass) return NULL;
vlivanov@30222 2874
vlivanov@30222 2875 // Throws an exception if outer klass has not declared k as an inner klass
vlivanov@30222 2876 // We need evidence that each klass knows about the other, or else
vlivanov@30222 2877 // the system could allow a spoof of an inner class to gain access rights.
hseigel@46341 2878 Reflection::check_for_inner_class(outer_klass, this, *inner_is_member, CHECK_NULL);
mgronlun@34666 2879 return outer_klass;
vlivanov@30222 2880 }
duke@1 2881
coleenp@13728 2882 jint InstanceKlass::compute_modifier_flags(TRAPS) const {
duke@1 2883 jint access = access_flags().as_int();
duke@1 2884
duke@1 2885 // But check if it happens to be member class.
coleenp@46329 2886 InnerClassesIterator iter(this);
jiangli@12231 2887 for (; !iter.done(); iter.next()) {
jiangli@12231 2888 int ioff = iter.inner_class_info_index();
jiangli@12231 2889 // Inner class attribute can be zero, skip it.
jiangli@12231 2890 // Strange but true: JVM spec. allows null inner class refs.
jiangli@12231 2891 if (ioff == 0) continue;
jiangli@12231 2892
jiangli@12231 2893 // only look at classes that are already loaded
jiangli@12231 2894 // since we are looking for the flags for our self.
coleenp@46329 2895 Symbol* inner_name = constants()->klass_name_at(ioff);
coleenp@46329 2896 if (name() == inner_name) {
jiangli@12231 2897 // This is really a member class.
jiangli@12231 2898 access = iter.inner_access_flags();
jiangli@12231 2899 break;
duke@1 2900 }
duke@1 2901 }
duke@1 2902 // Remember to strip ACC_SUPER bit
duke@1 2903 return (access & (~JVM_ACC_SUPER)) & JVM_ACC_WRITTEN_FLAGS;
duke@1 2904 }
duke@1 2905
coleenp@13728 2906 jint InstanceKlass::jvmti_class_status() const {
duke@1 2907 jint result = 0;
duke@1 2908
duke@1 2909 if (is_linked()) {
duke@1 2910 result |= JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED;
duke@1 2911 }
duke@1 2912
duke@1 2913 if (is_initialized()) {
duke@1 2914 assert(is_linked(), "Class status is not consistent");
duke@1 2915 result |= JVMTI_CLASS_STATUS_INITIALIZED;
duke@1 2916 }
duke@1 2917 if (is_in_error_state()) {
duke@1 2918 result |= JVMTI_CLASS_STATUS_ERROR;
duke@1 2919 }
duke@1 2920 return result;
duke@1 2921 }
duke@1 2922
coleenp@13728 2923 Method* InstanceKlass::method_at_itable(Klass* holder, int index, TRAPS) {
duke@1 2924 itableOffsetEntry* ioe = (itableOffsetEntry*)start_of_itable();
duke@1 2925 int method_table_offset_in_words = ioe->offset()/wordSize;
duke@1 2926 int nof_interfaces = (method_table_offset_in_words - itable_offset_in_words())
duke@1 2927 / itableOffsetEntry::size();
duke@1 2928
duke@1 2929 for (int cnt = 0 ; ; cnt ++, ioe ++) {
twisti@2131 2930 // If the interface isn't implemented by the receiver class,
duke@1 2931 // the VM should throw IncompatibleClassChangeError.
duke@1 2932 if (cnt >= nof_interfaces) {
goetz@50633 2933 ResourceMark rm(THREAD);
goetz@50633 2934 stringStream ss;
lfoltan@50761 2935 bool same_module = (module() == holder->module());
goetz@50633 2936 ss.print("Receiver class %s does not implement "
lfoltan@50761 2937 "the interface %s defining the method to be called "
lfoltan@50761 2938 "(%s%s%s)",
lfoltan@50761 2939 external_name(), holder->external_name(),
lfoltan@50761 2940 (same_module) ? joint_in_module_of_loader(holder) : class_in_module_of_loader(),
lfoltan@50761 2941 (same_module) ? "" : "; ",
lfoltan@50761 2942 (same_module) ? "" : holder->class_in_module_of_loader());
goetz@50633 2943 THROW_MSG_NULL(vmSymbols::java_lang_IncompatibleClassChangeError(), ss.as_string());
duke@1 2944 }
duke@1 2945
coleenp@13728 2946 Klass* ik = ioe->interface_klass();
duke@1 2947 if (ik == holder) break;
duke@1 2948 }
duke@1 2949
coleenp@13728 2950 itableMethodEntry* ime = ioe->first_method_entry(this);
coleenp@13728 2951 Method* m = ime[index].method();
duke@1 2952 if (m == NULL) {
coleenp@13728 2953 THROW_NULL(vmSymbols::java_lang_AbstractMethodError());
duke@1 2954 }
duke@1 2955 return m;
duke@1 2956 }
duke@1 2957
acorn@20391 2958
acorn@20391 2959 #if INCLUDE_JVMTI
acorn@20391 2960 // update default_methods for redefineclasses for methods that are
acorn@20391 2961 // not yet in the vtable due to concurrent subclass define and superinterface
acorn@20391 2962 // redefinition
acorn@20391 2963 // Note: those in the vtable, should have been updated via adjust_method_entries
coleenp@53904 2964 void InstanceKlass::adjust_default_methods(bool* trace_name_printed) {
acorn@20391 2965 // search the default_methods for uses of either obsolete or EMCP methods
acorn@20391 2966 if (default_methods() != NULL) {
sspitsyn@29316 2967 for (int index = 0; index < default_methods()->length(); index ++) {
sspitsyn@29316 2968 Method* old_method = default_methods()->at(index);
coleenp@53904 2969 if (old_method == NULL || !old_method->is_old()) {
sspitsyn@29316 2970 continue; // skip uninteresting entries
sspitsyn@29316 2971 }
sspitsyn@29316 2972 assert(!old_method->is_deleted(), "default methods may not be deleted");
coleenp@53904 2973 Method* new_method = old_method->get_new_method();
sspitsyn@29316 2974 default_methods()->at_put(index, new_method);
coleenp@53904 2975
rehn@38259 2976 if (log_is_enabled(Info, redefine, class, update)) {
rehn@38259 2977 ResourceMark rm;
sspitsyn@29316 2978 if (!(*trace_name_printed)) {
rehn@38259 2979 log_info(redefine, class, update)
rehn@38259 2980 ("adjust: klassname=%s default methods from name=%s",
rehn@38259 2981 external_name(), old_method->method_holder()->external_name());
sspitsyn@29316 2982 *trace_name_printed = true;
acorn@20391 2983 }
rehn@38259 2984 log_debug(redefine, class, update, vtables)
rehn@38259 2985 ("default method update: %s(%s) ",
rehn@38259 2986 new_method->name()->as_C_string(), new_method->signature()->as_C_string());
acorn@20391 2987 }
acorn@20391 2988 }
acorn@20391 2989 }
acorn@20391 2990 }
acorn@20391 2991 #endif // INCLUDE_JVMTI
acorn@20391 2992
duke@1 2993 // On-stack replacement stuff
coleenp@13728 2994 void InstanceKlass::add_osr_nmethod(nmethod* n) {
rehn@56312 2995 assert_lock_strong(CompiledMethod_lock);
xliu@54736 2996 #ifndef PRODUCT
xliu@54736 2997 if (TieredCompilation) {
xliu@54736 2998 nmethod * prev = lookup_osr_nmethod(n->method(), n->osr_entry_bci(), n->comp_level(), true);
xliu@54736 2999 assert(prev == NULL || !prev->is_in_use(),
xliu@54736 3000 "redundunt OSR recompilation detected. memory leak in CodeCache!");
xliu@54736 3001 }
xliu@54736 3002 #endif
duke@1 3003 // only one compilation can be active
thartmann@27409 3004 {
thartmann@27409 3005 assert(n->is_osr_method(), "wrong kind of nmethod");
thartmann@27409 3006 n->set_osr_link(osr_nmethods_head());
thartmann@27409 3007 set_osr_nmethods_head(n);
thartmann@27409 3008 // Raise the highest osr level if necessary
thartmann@27409 3009 if (TieredCompilation) {
thartmann@27409 3010 Method* m = n->method();
thartmann@27409 3011 m->set_highest_osr_comp_level(MAX2(m->highest_osr_comp_level(), n->comp_level()));
thartmann@27409 3012 }
iveresov@6453 3013 }
iveresov@6453 3014
iveresov@6453 3015 // Get rid of the osr methods for the same bci that have lower levels.
iveresov@6453 3016 if (TieredCompilation) {
iveresov@6453 3017 for (int l = CompLevel_limited_profile; l < n->comp_level(); l++) {
iveresov@6453 3018 nmethod *inv = lookup_osr_nmethod(n->method(), n->osr_entry_bci(), l, true);
iveresov@6453 3019 if (inv != NULL && inv->is_in_use()) {
iveresov@6453 3020 inv->make_not_entrant();
iveresov@6453 3021 }
iveresov@6453 3022 }
iveresov@6453 3023 }
duke@1 3024 }
duke@1 3025
thartmann@36802 3026 // Remove osr nmethod from the list. Return true if found and removed.
thartmann@36802 3027 bool InstanceKlass::remove_osr_nmethod(nmethod* n) {
duke@1 3028 // This is a short non-blocking critical region, so the no safepoint check is ok.
rehn@56312 3029 MutexLocker ml(CompiledMethod_lock->owned_by_self() ? NULL : CompiledMethod_lock
rehn@56312 3030 , Mutex::_no_safepoint_check_flag);
duke@1 3031 assert(n->is_osr_method(), "wrong kind of nmethod");
duke@1 3032 nmethod* last = NULL;
duke@1 3033 nmethod* cur = osr_nmethods_head();
iveresov@6453 3034 int max_level = CompLevel_none; // Find the max comp level excluding n
coleenp@13728 3035 Method* m = n->method();
duke@1 3036 // Search for match
thartmann@36802 3037 bool found = false;
duke@1 3038 while(cur != NULL && cur != n) {
neliasso@22920 3039 if (TieredCompilation && m == cur->method()) {
iveresov@6453 3040 // Find max level before n
iveresov@6453 3041 max_level = MAX2(max_level, cur->comp_level());
iveresov@6453 3042 }
duke@1 3043 last = cur;
jrose@3908 3044 cur = cur->osr_link();
duke@1 3045 }
iveresov@6453 3046 nmethod* next = NULL;
duke@1 3047 if (cur == n) {
thartmann@36802 3048 found = true;
iveresov@6453 3049 next = cur->osr_link();
duke@1 3050 if (last == NULL) {
duke@1 3051 // Remove first element
iveresov@6453 3052 set_osr_nmethods_head(next);
duke@1 3053 } else {
iveresov@6453 3054 last->set_osr_link(next);
duke@1 3055 }
duke@1 3056 }
jrose@3908 3057 n->set_osr_link(NULL);
iveresov@6453 3058 if (TieredCompilation) {
iveresov@6453 3059 cur = next;
iveresov@6453 3060 while (cur != NULL) {
iveresov@6453 3061 // Find max level after n
neliasso@22920 3062 if (m == cur->method()) {
neliasso@22920 3063 max_level = MAX2(max_level, cur->comp_level());
neliasso@22920 3064 }
iveresov@6453 3065 cur = cur->osr_link();
iveresov@6453 3066 }
iveresov@6453 3067 m->set_highest_osr_comp_level(max_level);
iveresov@6453 3068 }
thartmann@36802 3069 return found;
duke@1 3070 }
duke@1 3071
thartmann@27434 3072 int InstanceKlass::mark_osr_nmethods(const Method* m) {
rehn@56312 3073 MutexLocker ml(CompiledMethod_lock->owned_by_self() ? NULL : CompiledMethod_lock,
rehn@56312 3074 Mutex::_no_safepoint_check_flag);
thartmann@27434 3075 nmethod* osr = osr_nmethods_head();
thartmann@27434 3076 int found = 0;
thartmann@27434 3077 while (osr != NULL) {
thartmann@27434 3078 assert(osr->is_osr_method(), "wrong kind of nmethod found in chain");
thartmann@27434 3079 if (osr->method() == m) {
thartmann@27434 3080 osr->mark_for_deoptimization();
thartmann@27434 3081 found++;
thartmann@27434 3082 }
thartmann@27434 3083 osr = osr->osr_link();
thartmann@27434 3084 }
thartmann@27434 3085 return found;
thartmann@27434 3086 }
thartmann@27434 3087
minqi@17370 3088 nmethod* InstanceKlass::lookup_osr_nmethod(const Method* m, int bci, int comp_level, bool match_level) const {
rehn@56312 3089 MutexLocker ml(CompiledMethod_lock->owned_by_self() ? NULL : CompiledMethod_lock,
rehn@56312 3090 Mutex::_no_safepoint_check_flag);
duke@1 3091 nmethod* osr = osr_nmethods_head();
iveresov@6453 3092 nmethod* best = NULL;
duke@1 3093 while (osr != NULL) {
duke@1 3094 assert(osr->is_osr_method(), "wrong kind of nmethod found in chain");
iveresov@6453 3095 // There can be a time when a c1 osr method exists but we are waiting
iveresov@6453 3096 // for a c2 version. When c2 completes its osr nmethod we will trash
iveresov@6453 3097 // the c1 version and only be able to find the c2 version. However
iveresov@6453 3098 // while we overflow in the c1 code at back branches we don't want to
iveresov@6453 3099 // try and switch to the same code as we are already running
iveresov@6453 3100
duke@1 3101 if (osr->method() == m &&
duke@1 3102 (bci == InvocationEntryBci || osr->osr_entry_bci() == bci)) {
iveresov@6453 3103 if (match_level) {
iveresov@6453 3104 if (osr->comp_level() == comp_level) {
iveresov@6453 3105 // Found a match - return it.
iveresov@6453 3106 return osr;
iveresov@6453 3107 }
iveresov@6453 3108 } else {
iveresov@6453 3109 if (best == NULL || (osr->comp_level() > best->comp_level())) {
iveresov@6453 3110 if (osr->comp_level() == CompLevel_highest_tier) {
iveresov@6453 3111 // Found the best possible - return it.
iveresov@6453 3112 return osr;
iveresov@6453 3113 }
iveresov@6453 3114 best = osr;
iveresov@6453 3115 }
iveresov@6453 3116 }
duke@1 3117 }
jrose@3908 3118 osr = osr->osr_link();
duke@1 3119 }
xliu@54736 3120
xliu@54736 3121 assert(match_level == false || best == NULL, "shouldn't pick up anything if match_level is set");
xliu@54736 3122 if (best != NULL && best->comp_level() >= comp_level) {
iveresov@6453 3123 return best;
iveresov@6453 3124 }
duke@1 3125 return NULL;
duke@1 3126 }
duke@1 3127
duke@1 3128 // -----------------------------------------------------------------------------------------------------
coleenp@13728 3129 // Printing
coleenp@13728 3130
duke@1 3131 #ifndef PRODUCT
duke@1 3132
jrose@2332 3133 #define BULLET " - "
jrose@2332 3134
coleenp@13728 3135 static const char* state_names[] = {
coleenp@13728 3136 "allocated", "loaded", "linked", "being_initialized", "fully_initialized", "initialization_error"
coleenp@13728 3137 };
coleenp@13728 3138
drchase@20017 3139 static void print_vtable(intptr_t* start, int len, outputStream* st) {
drchase@20017 3140 for (int i = 0; i < len; i++) {
drchase@20017 3141 intptr_t e = start[i];
drchase@20017 3142 st->print("%d : " INTPTR_FORMAT, i, e);
stuefe@54437 3143 if (MetaspaceObj::is_valid((Metadata*)e)) {
drchase@20017 3144 st->print(" ");
drchase@20017 3145 ((Metadata*)e)->print_value_on(st);
drchase@20017 3146 }
drchase@20017 3147 st->cr();
drchase@20017 3148 }
drchase@20017 3149 }
drchase@20017 3150
mgerdin@35900 3151 static void print_vtable(vtableEntry* start, int len, outputStream* st) {
mgerdin@35900 3152 return print_vtable(reinterpret_cast<intptr_t*>(start), len, st);
mgerdin@35900 3153 }
mgerdin@35900 3154
coleenp@13728 3155 void InstanceKlass::print_on(outputStream* st) const {
coleenp@13728 3156 assert(is_klass(), "must be klass");
coleenp@13728 3157 Klass::print_on(st);
coleenp@13728 3158
coleenp@13728 3159 st->print(BULLET"instance size: %d", size_helper()); st->cr();
coleenp@13728 3160 st->print(BULLET"klass size: %d", size()); st->cr();
coleenp@13728 3161 st->print(BULLET"access: "); access_flags().print_on(st); st->cr();
drchase@24424 3162 st->print(BULLET"state: "); st->print_cr("%s", state_names[_init_state]);
coleenp@13728 3163 st->print(BULLET"name: "); name()->print_value_on(st); st->cr();
hseigel@51265 3164 st->print(BULLET"super: "); Metadata::print_value_on_maybe_null(st, super()); st->cr();
coleenp@13728 3165 st->print(BULLET"sub: ");
coleenp@52356 3166 Klass* sub = subklass();
coleenp@52356 3167 int n;
coleenp@52356 3168 for (n = 0; sub != NULL; n++, sub = sub->next_sibling()) {
coleenp@52356 3169 if (n < MaxSubklassPrintSize) {
coleenp@52356 3170 sub->print_value_on(st);
coleenp@52356 3171 st->print(" ");
coleenp@13728 3172 }
coleenp@13728 3173 }
coleenp@52356 3174 if (n >= MaxSubklassPrintSize) st->print("(" INTX_FORMAT " more klasses...)", n - MaxSubklassPrintSize);
coleenp@52356 3175 st->cr();
coleenp@52356 3176
coleenp@52356 3177 if (is_interface()) {
coleenp@52356 3178 st->print_cr(BULLET"nof implementors: %d", nof_implementors());
coleenp@52356 3179 if (nof_implementors() == 1) {
coleenp@52356 3180 st->print_cr(BULLET"implementor: ");
coleenp@52356 3181 st->print(" ");
coleenp@52356 3182 implementor()->print_value_on(st);
coleenp@52356 3183 st->cr();
coleenp@52356 3184 }
coleenp@52356 3185 }
coleenp@52356 3186
hseigel@51265 3187 st->print(BULLET"arrays: "); Metadata::print_value_on_maybe_null(st, array_klasses()); st->cr();
coleenp@13728 3188 st->print(BULLET"methods: "); methods()->print_value_on(st); st->cr();
drchase@20017 3189 if (Verbose || WizardMode) {
coleenp@13728 3190 Array<Method*>* method_array = methods();
acorn@20391 3191 for (int i = 0; i < method_array->length(); i++) {
coleenp@13728 3192 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr();
coleenp@13728 3193 }
coleenp@13728 3194 }
acorn@20391 3195 st->print(BULLET"method ordering: "); method_ordering()->print_value_on(st); st->cr();
acorn@20391 3196 st->print(BULLET"default_methods: "); default_methods()->print_value_on(st); st->cr();
acorn@20391 3197 if (Verbose && default_methods() != NULL) {
acorn@20391 3198 Array<Method*>* method_array = default_methods();
acorn@20391 3199 for (int i = 0; i < method_array->length(); i++) {
acorn@20391 3200 st->print("%d : ", i); method_array->at(i)->print_value(); st->cr();
acorn@20391 3201 }
acorn@20391 3202 }
acorn@20391 3203 if (default_vtable_indices() != NULL) {
acorn@20391 3204 st->print(BULLET"default vtable indices: "); default_vtable_indices()->print_value_on(st); st->cr();
acorn@20391 3205 }
coleenp@13728 3206 st->print(BULLET"local interfaces: "); local_interfaces()->print_value_on(st); st->cr();
coleenp@13728 3207 st->print(BULLET"trans. interfaces: "); transitive_interfaces()->print_value_on(st); st->cr();
coleenp@13728 3208 st->print(BULLET"constants: "); constants()->print_value_on(st); st->cr();
coleenp@13728 3209 if (class_loader_data() != NULL) {
coleenp@13728 3210 st->print(BULLET"class loader data: ");
coleenp@13728 3211 class_loader_data()->print_value_on(st);
coleenp@13728 3212 st->cr();
coleenp@13728 3213 }
lfoltan@51444 3214 st->print(BULLET"unsafe anonymous host class: "); Metadata::print_value_on_maybe_null(st, unsafe_anonymous_host()); st->cr();
coleenp@13728 3215 if (source_file_name() != NULL) {
coleenp@13728 3216 st->print(BULLET"source file: ");
coleenp@13728 3217 source_file_name()->print_value_on(st);
coleenp@13728 3218 st->cr();
coleenp@13728 3219 }
coleenp@13728 3220 if (source_debug_extension() != NULL) {
coleenp@13728 3221 st->print(BULLET"source debug extension: ");
coleenp@13728 3222 st->print("%s", source_debug_extension());
coleenp@13728 3223 st->cr();
coleenp@13728 3224 }
coleenp@15601 3225 st->print(BULLET"class annotations: "); class_annotations()->print_value_on(st); st->cr();
coleenp@15601 3226 st->print(BULLET"class type annotations: "); class_type_annotations()->print_value_on(st); st->cr();
coleenp@15601 3227 st->print(BULLET"field annotations: "); fields_annotations()->print_value_on(st); st->cr();
coleenp@15601 3228 st->print(BULLET"field type annotations: "); fields_type_annotations()->print_value_on(st); st->cr();
coleenp@13728 3229 {
coleenp@20059 3230 bool have_pv = false;
coleenp@26558 3231 // previous versions are linked together through the InstanceKlass
cjplummer@38059 3232 for (InstanceKlass* pv_node = previous_versions();
coleenp@26558 3233 pv_node != NULL;
coleenp@26558 3234 pv_node = pv_node->previous_versions()) {
coleenp@20059 3235 if (!have_pv)
coleenp@20059 3236 st->print(BULLET"previous version: ");
coleenp@20059 3237 have_pv = true;
coleenp@26558 3238 pv_node->constants()->print_value_on(st);
coleenp@20059 3239 }
coleenp@20059 3240 if (have_pv) st->cr();
coleenp@26558