src/hotspot/share/classfile/systemDictionary.cpp
author coleenp
Mon, 10 Sep 2018 16:49:01 -0400
changeset 53322 8ba5b3c76857
parent 52587 6cd56deebb0d
child 53335 585902b2bfcb
permissions -rw-r--r--
8210094: Better loading of classloader classes Reviewed-by: acorn, hseigel, ahgross, rhalade
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/*
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 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "jvm.h"
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#include "aot/aotLoader.hpp"
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#include "classfile/classFileParser.hpp"
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#include "classfile/classFileStream.hpp"
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#include "classfile/classLoader.hpp"
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#include "classfile/classLoaderData.inline.hpp"
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#include "classfile/classLoaderDataGraph.inline.hpp"
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#include "classfile/classLoaderExt.hpp"
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#include "classfile/dictionary.hpp"
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#include "classfile/javaClasses.inline.hpp"
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#include "classfile/klassFactory.hpp"
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#include "classfile/loaderConstraints.hpp"
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#include "classfile/packageEntry.hpp"
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#include "classfile/placeholders.hpp"
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#include "classfile/protectionDomainCache.hpp"
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#include "classfile/resolutionErrors.hpp"
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#include "classfile/stringTable.hpp"
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#include "classfile/systemDictionary.hpp"
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#include "classfile/vmSymbols.hpp"
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#include "code/codeCache.hpp"
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#include "compiler/compileBroker.hpp"
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#include "gc/shared/gcTraceTime.inline.hpp"
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#include "gc/shared/oopStorage.inline.hpp"
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#include "interpreter/bytecodeStream.hpp"
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#include "interpreter/interpreter.hpp"
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#include "jfr/jfrEvents.hpp"
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#include "logging/log.hpp"
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#include "logging/logStream.hpp"
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#include "memory/filemap.hpp"
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#include "memory/heapShared.hpp"
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#include "memory/metaspaceClosure.hpp"
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#include "memory/oopFactory.hpp"
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#include "memory/resourceArea.hpp"
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#include "oops/access.inline.hpp"
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#include "oops/instanceKlass.hpp"
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#include "oops/instanceRefKlass.hpp"
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#include "oops/klass.inline.hpp"
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#include "oops/method.inline.hpp"
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#include "oops/methodData.hpp"
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#include "oops/objArrayKlass.hpp"
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#include "oops/objArrayOop.inline.hpp"
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#include "oops/oop.inline.hpp"
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#include "oops/symbol.hpp"
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#include "oops/typeArrayKlass.hpp"
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#include "prims/jvmtiExport.hpp"
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#include "prims/resolvedMethodTable.hpp"
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#include "prims/methodHandles.hpp"
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#include "runtime/arguments.hpp"
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#include "runtime/arguments_ext.hpp"
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#include "runtime/biasedLocking.hpp"
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#include "runtime/fieldType.hpp"
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#include "runtime/handles.inline.hpp"
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#include "runtime/java.hpp"
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#include "runtime/javaCalls.hpp"
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#include "runtime/mutexLocker.hpp"
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#include "runtime/orderAccess.hpp"
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#include "runtime/sharedRuntime.hpp"
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#include "runtime/signature.hpp"
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#include "services/classLoadingService.hpp"
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#include "services/diagnosticCommand.hpp"
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#include "services/threadService.hpp"
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#include "utilities/macros.hpp"
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#if INCLUDE_CDS
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#include "classfile/systemDictionaryShared.hpp"
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#endif
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#if INCLUDE_JVMCI
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#include "jvmci/jvmciRuntime.hpp"
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#endif
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#if INCLUDE_JFR
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#include "jfr/jfr.hpp"
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#endif
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PlaceholderTable*      SystemDictionary::_placeholders        = NULL;
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LoaderConstraintTable* SystemDictionary::_loader_constraints  = NULL;
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ResolutionErrorTable*  SystemDictionary::_resolution_errors   = NULL;
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SymbolPropertyTable*   SystemDictionary::_invoke_method_table = NULL;
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ProtectionDomainCacheTable*   SystemDictionary::_pd_cache_table = NULL;
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int         SystemDictionary::_number_of_modifications = 0;
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oop         SystemDictionary::_system_loader_lock_obj     =  NULL;
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InstanceKlass*      SystemDictionary::_well_known_klasses[SystemDictionary::WKID_LIMIT]
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                                                          =  { NULL /*, NULL...*/ };
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InstanceKlass*      SystemDictionary::_box_klasses[T_VOID+1]      =  { NULL /*, NULL...*/ };
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oop         SystemDictionary::_java_system_loader         =  NULL;
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oop         SystemDictionary::_java_platform_loader       =  NULL;
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bool        SystemDictionary::_has_checkPackageAccess     =  false;
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// Default ProtectionDomainCacheSize value
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const int defaultProtectionDomainCacheSize = 1009;
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OopStorage* SystemDictionary::_vm_weak_oop_storage = NULL;
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// ----------------------------------------------------------------------------
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// Java-level SystemLoader and PlatformLoader
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oop SystemDictionary::java_system_loader() {
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  return _java_system_loader;
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}
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oop SystemDictionary::java_platform_loader() {
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  return _java_platform_loader;
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}
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void SystemDictionary::compute_java_loaders(TRAPS) {
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  JavaValue result(T_OBJECT);
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  InstanceKlass* class_loader_klass = SystemDictionary::ClassLoader_klass();
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  JavaCalls::call_static(&result,
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                         class_loader_klass,
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                         vmSymbols::getSystemClassLoader_name(),
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                         vmSymbols::void_classloader_signature(),
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                         CHECK);
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  _java_system_loader = (oop)result.get_jobject();
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  JavaCalls::call_static(&result,
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                         class_loader_klass,
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                         vmSymbols::getPlatformClassLoader_name(),
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                         vmSymbols::void_classloader_signature(),
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                         CHECK);
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  _java_platform_loader = (oop)result.get_jobject();
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}
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ClassLoaderData* SystemDictionary::register_loader(Handle class_loader) {
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  if (class_loader() == NULL) return ClassLoaderData::the_null_class_loader_data();
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  return ClassLoaderDataGraph::find_or_create(class_loader);
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}
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// ----------------------------------------------------------------------------
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// Parallel class loading check
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bool SystemDictionary::is_parallelCapable(Handle class_loader) {
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  if (class_loader.is_null()) return true;
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  if (AlwaysLockClassLoader) return false;
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  return java_lang_ClassLoader::parallelCapable(class_loader());
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}
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// ----------------------------------------------------------------------------
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// ParallelDefineClass flag does not apply to bootclass loader
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bool SystemDictionary::is_parallelDefine(Handle class_loader) {
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   if (class_loader.is_null()) return false;
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   if (AllowParallelDefineClass && java_lang_ClassLoader::parallelCapable(class_loader())) {
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     return true;
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   }
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   return false;
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}
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// Returns true if the passed class loader is the builtin application class loader
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// or a custom system class loader. A customer system class loader can be
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// specified via -Djava.system.class.loader.
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bool SystemDictionary::is_system_class_loader(oop class_loader) {
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  if (class_loader == NULL) {
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    return false;
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  }
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  return (class_loader->klass() == SystemDictionary::jdk_internal_loader_ClassLoaders_AppClassLoader_klass() ||
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         oopDesc::equals(class_loader, _java_system_loader));
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}
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// Returns true if the passed class loader is the platform class loader.
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bool SystemDictionary::is_platform_class_loader(oop class_loader) {
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  if (class_loader == NULL) {
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    return false;
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  }
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  return (class_loader->klass() == SystemDictionary::jdk_internal_loader_ClassLoaders_PlatformClassLoader_klass());
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}
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// ----------------------------------------------------------------------------
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// Resolving of classes
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// Forwards to resolve_or_null
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Klass* SystemDictionary::resolve_or_fail(Symbol* class_name, Handle class_loader, Handle protection_domain, bool throw_error, TRAPS) {
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  Klass* klass = resolve_or_null(class_name, class_loader, protection_domain, THREAD);
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  if (HAS_PENDING_EXCEPTION || klass == NULL) {
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    // can return a null klass
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    klass = handle_resolution_exception(class_name, throw_error, klass, THREAD);
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  }
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  return klass;
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}
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Klass* SystemDictionary::handle_resolution_exception(Symbol* class_name,
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                                                     bool throw_error,
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                                                     Klass* klass, TRAPS) {
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  if (HAS_PENDING_EXCEPTION) {
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    // If we have a pending exception we forward it to the caller, unless throw_error is true,
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    // in which case we have to check whether the pending exception is a ClassNotFoundException,
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    // and if so convert it to a NoClassDefFoundError
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    // And chain the original ClassNotFoundException
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    if (throw_error && PENDING_EXCEPTION->is_a(SystemDictionary::ClassNotFoundException_klass())) {
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      ResourceMark rm(THREAD);
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      assert(klass == NULL, "Should not have result with exception pending");
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      Handle e(THREAD, PENDING_EXCEPTION);
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      CLEAR_PENDING_EXCEPTION;
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      THROW_MSG_CAUSE_NULL(vmSymbols::java_lang_NoClassDefFoundError(), class_name->as_C_string(), e);
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    } else {
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      return NULL;
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    }
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  }
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  // Class not found, throw appropriate error or exception depending on value of throw_error
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  if (klass == NULL) {
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    ResourceMark rm(THREAD);
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    if (throw_error) {
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      THROW_MSG_NULL(vmSymbols::java_lang_NoClassDefFoundError(), class_name->as_C_string());
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    } else {
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      THROW_MSG_NULL(vmSymbols::java_lang_ClassNotFoundException(), class_name->as_C_string());
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    }
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  }
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  return klass;
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}
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Klass* SystemDictionary::resolve_or_fail(Symbol* class_name,
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                                           bool throw_error, TRAPS)
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{
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  return resolve_or_fail(class_name, Handle(), Handle(), throw_error, THREAD);
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}
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// Forwards to resolve_array_class_or_null or resolve_instance_class_or_null
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Klass* SystemDictionary::resolve_or_null(Symbol* class_name, Handle class_loader, Handle protection_domain, TRAPS) {
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  if (FieldType::is_array(class_name)) {
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    return resolve_array_class_or_null(class_name, class_loader, protection_domain, THREAD);
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  } else {
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    return resolve_instance_class_or_null_helper(class_name, class_loader, protection_domain, THREAD);
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  }
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}
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// name may be in the form of "java/lang/Object" or "Ljava/lang/Object;"
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InstanceKlass* SystemDictionary::resolve_instance_class_or_null_helper(Symbol* class_name,
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                                                                       Handle class_loader,
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                                                                       Handle protection_domain,
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                                                                       TRAPS) {
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  assert(class_name != NULL && !FieldType::is_array(class_name), "must be");
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  if (FieldType::is_obj(class_name)) {
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    ResourceMark rm(THREAD);
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    // Ignore wrapping L and ;.
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    TempNewSymbol name = SymbolTable::new_symbol(class_name->as_C_string() + 1,
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                                   class_name->utf8_length() - 2, CHECK_NULL);
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    return resolve_instance_class_or_null(name, class_loader, protection_domain, THREAD);
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  } else {
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    return resolve_instance_class_or_null(class_name, class_loader, protection_domain, THREAD);
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  }
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}
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Klass* SystemDictionary::resolve_or_null(Symbol* class_name, TRAPS) {
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  return resolve_or_null(class_name, Handle(), Handle(), THREAD);
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}
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// Forwards to resolve_instance_class_or_null
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Klass* SystemDictionary::resolve_array_class_or_null(Symbol* class_name,
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                                                     Handle class_loader,
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                                                     Handle protection_domain,
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                                                     TRAPS) {
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  assert(FieldType::is_array(class_name), "must be array");
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  Klass* k = NULL;
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  FieldArrayInfo fd;
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  // dimension and object_key in FieldArrayInfo are assigned as a side-effect
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  // of this call
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  BasicType t = FieldType::get_array_info(class_name, fd, CHECK_NULL);
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  if (t == T_OBJECT) {
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    // naked oop "k" is OK here -- we assign back into it
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    k = SystemDictionary::resolve_instance_class_or_null(fd.object_key(),
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                                                         class_loader,
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                                                         protection_domain,
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                                                         CHECK_NULL);
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   298
    if (k != NULL) {
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      k = k->array_klass(fd.dimension(), CHECK_NULL);
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    }
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   301
  } else {
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    k = Universe::typeArrayKlassObj(t);
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   303
    k = TypeArrayKlass::cast(k)->array_klass(fd.dimension(), CHECK_NULL);
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   304
  }
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   305
  return k;
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   306
}
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   307
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   309
// Must be called for any super-class or super-interface resolution
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   310
// during class definition to allow class circularity checking
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   311
// super-interface callers:
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   312
//    parse_interfaces - for defineClass & jvmtiRedefineClasses
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   313
// super-class callers:
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   314
//   ClassFileParser - for defineClass & jvmtiRedefineClasses
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   315
//   load_shared_class - while loading a class from shared archive
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//   resolve_instance_class_or_null:
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//     via: handle_parallel_super_load
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//      when resolving a class that has an existing placeholder with
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   319
//      a saved superclass [i.e. a defineClass is currently in progress]
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   320
//      if another thread is trying to resolve the class, it must do
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   321
//      super-class checks on its own thread to catch class circularity
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   322
// This last call is critical in class circularity checking for cases
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   323
// where classloading is delegated to different threads and the
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   324
// classloader lock is released.
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   325
// Take the case: Base->Super->Base
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   326
//   1. If thread T1 tries to do a defineClass of class Base
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   327
//    resolve_super_or_fail creates placeholder: T1, Base (super Super)
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   328
//   2. resolve_instance_class_or_null does not find SD or placeholder for Super
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   329
//    so it tries to load Super
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   330
//   3. If we load the class internally, or user classloader uses same thread
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   331
//      loadClassFromxxx or defineClass via parseClassFile Super ...
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   332
//      3.1 resolve_super_or_fail creates placeholder: T1, Super (super Base)
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   333
//      3.3 resolve_instance_class_or_null Base, finds placeholder for Base
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   334
//      3.4 calls resolve_super_or_fail Base
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   335
//      3.5 finds T1,Base -> throws class circularity
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   336
//OR 4. If T2 tries to resolve Super via defineClass Super ...
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   337
//      4.1 resolve_super_or_fail creates placeholder: T2, Super (super Base)
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   338
//      4.2 resolve_instance_class_or_null Base, finds placeholder for Base (super Super)
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   339
//      4.3 calls resolve_super_or_fail Super in parallel on own thread T2
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   340
//      4.4 finds T2, Super -> throws class circularity
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   341
// Must be called, even if superclass is null, since this is
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   342
// where the placeholder entry is created which claims this
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   343
// thread is loading this class/classloader.
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// Be careful when modifying this code: once you have run
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   345
// placeholders()->find_and_add(PlaceholderTable::LOAD_SUPER),
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   346
// you need to find_and_remove it before returning.
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   347
// So be careful to not exit with a CHECK_ macro betweeen these calls.
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InstanceKlass* SystemDictionary::resolve_super_or_fail(Symbol* child_name,
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   349
                                                       Symbol* super_name,
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   350
                                                       Handle class_loader,
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   351
                                                       Handle protection_domain,
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   352
                                                       bool is_superclass,
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   353
                                                       TRAPS) {
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   354
  assert(!FieldType::is_array(super_name), "invalid super class name");
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   355
#if INCLUDE_CDS
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   356
  if (DumpSharedSpaces) {
52514
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   357
    // Special processing for handling UNREGISTERED shared classes.
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   358
    InstanceKlass* k = SystemDictionaryShared::dump_time_resolve_super_or_fail(child_name,
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   359
        super_name, class_loader, protection_domain, is_superclass, CHECK_NULL);
34257
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   360
    if (k) {
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   361
      return k;
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
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   362
    }
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
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diff changeset
   363
  }
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   364
#endif // INCLUDE_CDS
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   365
1
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   366
  // Double-check, if child class is already loaded, just return super-class,interface
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   367
  // Don't add a placedholder if already loaded, i.e. already in appropriate class loader
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   368
  // dictionary.
1
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   369
  // Make sure there's a placeholder for the *child* before resolving.
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parents:
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   370
  // Used as a claim that this thread is currently loading superclass/classloader
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   371
  // Used here for ClassCircularity checks and also for heap verification
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   372
  // (every InstanceKlass needs to be in its class loader dictionary or have a placeholder).
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   373
  // Must check ClassCircularity before checking if super class is already loaded.
1
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parents:
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   374
  //
489c9b5090e2 Initial load
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parents:
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   375
  // We might not already have a placeholder if this child_name was
489c9b5090e2 Initial load
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parents:
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   376
  // first seen via resolve_from_stream (jni_DefineClass or JVM_DefineClass);
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duke
parents:
diff changeset
   377
  // the name of the class might not be known until the stream is actually
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duke
parents:
diff changeset
   378
  // parsed.
489c9b5090e2 Initial load
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parents:
diff changeset
   379
  // Bugs 4643874, 4715493
489c9b5090e2 Initial load
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parents:
diff changeset
   380
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   381
  ClassLoaderData* loader_data = class_loader_data(class_loader);
46729
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   382
  Dictionary* dictionary = loader_data->dictionary();
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coleenp
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   383
  unsigned int d_hash = dictionary->compute_hash(child_name);
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
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diff changeset
   384
  unsigned int p_hash = placeholders()->compute_hash(child_name);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   385
  int p_index = placeholders()->hash_to_index(p_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   386
  // can't throw error holding a lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   387
  bool child_already_loaded = false;
489c9b5090e2 Initial load
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parents:
diff changeset
   388
  bool throw_circularity_error = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   389
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   390
    MutexLocker mu(SystemDictionary_lock, THREAD);
51329
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iklam
parents: 51268
diff changeset
   391
    InstanceKlass* childk = find_class(d_hash, child_name, dictionary);
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
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parents: 51268
diff changeset
   392
    InstanceKlass* quicksuperk;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   393
    // to support // loading: if child done loading, just return superclass
51329
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
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diff changeset
   394
    // if super_name, & class_loader don't match:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   395
    // if initial define, SD update will give LinkageError
489c9b5090e2 Initial load
duke
parents:
diff changeset
   396
    // if redefine: compare_class_versions will give HIERARCHY_CHANGED
489c9b5090e2 Initial load
duke
parents:
diff changeset
   397
    // so we don't throw an exception here.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   398
    // see: nsk redefclass014 & java.lang.instrument Instrument032
489c9b5090e2 Initial load
duke
parents:
diff changeset
   399
    if ((childk != NULL ) && (is_superclass) &&
51329
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   400
        ((quicksuperk = childk->java_super()) != NULL) &&
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   401
         ((quicksuperk->name() == super_name) &&
49658
8237a91c1cca 8199781: Don't use naked == for comparing oops
rkennke
parents: 49641
diff changeset
   402
            (oopDesc::equals(quicksuperk->class_loader(), class_loader())))) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   403
           return quicksuperk;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   404
    } else {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   405
      PlaceholderEntry* probe = placeholders()->get_entry(p_index, p_hash, child_name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   406
      if (probe && probe->check_seen_thread(THREAD, PlaceholderTable::LOAD_SUPER)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   407
          throw_circularity_error = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   408
      }
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   409
    }
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   410
    if (!throw_circularity_error) {
40016
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
   411
      // Be careful not to exit resolve_super
51329
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   412
      PlaceholderEntry* newprobe = placeholders()->find_and_add(p_index, p_hash, child_name, loader_data, PlaceholderTable::LOAD_SUPER, super_name, THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   413
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   414
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   415
  if (throw_circularity_error) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   416
      ResourceMark rm(THREAD);
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   417
      THROW_MSG_NULL(vmSymbols::java_lang_ClassCircularityError(), child_name->as_C_string());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   418
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   419
489c9b5090e2 Initial load
duke
parents:
diff changeset
   420
// java.lang.Object should have been found above
51329
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   421
  assert(super_name != NULL, "null super class for resolving");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   422
  // Resolve the super class or interface, check results on return
51329
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   423
  InstanceKlass* superk =
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   424
    SystemDictionary::resolve_instance_class_or_null_helper(super_name,
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   425
                                                            class_loader,
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   426
                                                            protection_domain,
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   427
                                                            THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   428
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   429
  // Clean up of placeholders moved so that each classloadAction registrar self-cleans up
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   430
  // It is no longer necessary to keep the placeholder table alive until update_dictionary
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   431
  // or error. GC used to walk the placeholder table as strong roots.
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   432
  // The instanceKlass is kept alive because the class loader is on the stack,
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   433
  // which keeps the loader_data alive, as well as all instanceKlasses in
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   434
  // the loader_data. parseClassFile adds the instanceKlass to loader_data.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   435
  {
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   436
    MutexLocker mu(SystemDictionary_lock, THREAD);
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   437
    placeholders()->find_and_remove(p_index, p_hash, child_name, loader_data, PlaceholderTable::LOAD_SUPER, THREAD);
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   438
    SystemDictionary_lock->notify_all();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   439
  }
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   440
  if (HAS_PENDING_EXCEPTION || superk == NULL) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   441
    // can null superk
51329
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   442
    Klass* k = handle_resolution_exception(super_name, true, superk, THREAD);
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   443
    assert(k == NULL || k == superk, "must be");
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   444
    if (k == NULL) {
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   445
      superk = NULL;
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   446
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   447
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   448
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   449
  return superk;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   450
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   451
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   452
void SystemDictionary::validate_protection_domain(InstanceKlass* klass,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   453
                                                  Handle class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   454
                                                  Handle protection_domain,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   455
                                                  TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   456
  if(!has_checkPackageAccess()) return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   457
489c9b5090e2 Initial load
duke
parents:
diff changeset
   458
  // Now we have to call back to java to check if the initating class has access
489c9b5090e2 Initial load
duke
parents:
diff changeset
   459
  JavaValue result(T_VOID);
46701
f559541c0daa 8181917: Refactor UL LogStreams to avoid using resource area
stuefe
parents: 46689
diff changeset
   460
  LogTarget(Debug, protectiondomain) lt;
f559541c0daa 8181917: Refactor UL LogStreams to avoid using resource area
stuefe
parents: 46689
diff changeset
   461
  if (lt.is_enabled()) {
36381
b9ed6bef9364 8149064: TraceProtectionDomainVerification has been converted to Unified Logging.
mockner
parents: 35918
diff changeset
   462
    ResourceMark rm;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
    // Print out trace information
46701
f559541c0daa 8181917: Refactor UL LogStreams to avoid using resource area
stuefe
parents: 46689
diff changeset
   464
    LogStream ls(lt);
f559541c0daa 8181917: Refactor UL LogStreams to avoid using resource area
stuefe
parents: 46689
diff changeset
   465
    ls.print_cr("Checking package access");
51268
4ac20e5f96ce 8202171: Some oopDesc functions compare this with NULL
hseigel
parents: 51180
diff changeset
   466
    if (class_loader() != NULL) {
4ac20e5f96ce 8202171: Some oopDesc functions compare this with NULL
hseigel
parents: 51180
diff changeset
   467
      ls.print("class loader: ");
4ac20e5f96ce 8202171: Some oopDesc functions compare this with NULL
hseigel
parents: 51180
diff changeset
   468
      class_loader()->print_value_on(&ls);
4ac20e5f96ce 8202171: Some oopDesc functions compare this with NULL
hseigel
parents: 51180
diff changeset
   469
    } else {
4ac20e5f96ce 8202171: Some oopDesc functions compare this with NULL
hseigel
parents: 51180
diff changeset
   470
      ls.print_cr("class loader: NULL");
4ac20e5f96ce 8202171: Some oopDesc functions compare this with NULL
hseigel
parents: 51180
diff changeset
   471
    }
4ac20e5f96ce 8202171: Some oopDesc functions compare this with NULL
hseigel
parents: 51180
diff changeset
   472
    if (protection_domain() != NULL) {
4ac20e5f96ce 8202171: Some oopDesc functions compare this with NULL
hseigel
parents: 51180
diff changeset
   473
      ls.print(" protection domain: ");
4ac20e5f96ce 8202171: Some oopDesc functions compare this with NULL
hseigel
parents: 51180
diff changeset
   474
      protection_domain()->print_value_on(&ls);
4ac20e5f96ce 8202171: Some oopDesc functions compare this with NULL
hseigel
parents: 51180
diff changeset
   475
    } else {
4ac20e5f96ce 8202171: Some oopDesc functions compare this with NULL
hseigel
parents: 51180
diff changeset
   476
      ls.print_cr(" protection domain: NULL");
4ac20e5f96ce 8202171: Some oopDesc functions compare this with NULL
hseigel
parents: 51180
diff changeset
   477
    }
46701
f559541c0daa 8181917: Refactor UL LogStreams to avoid using resource area
stuefe
parents: 46689
diff changeset
   478
    ls.print(" loading: "); klass->print_value_on(&ls);
f559541c0daa 8181917: Refactor UL LogStreams to avoid using resource area
stuefe
parents: 46689
diff changeset
   479
    ls.cr();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   480
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   481
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   482
  // This handle and the class_loader handle passed in keeps this class from
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   483
  // being unloaded through several GC points.
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   484
  // The class_loader handle passed in is the initiating loader.
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   485
  Handle mirror(THREAD, klass->java_mirror());
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   486
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   487
  InstanceKlass* system_loader = SystemDictionary::ClassLoader_klass();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   488
  JavaCalls::call_special(&result,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   489
                         class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   490
                         system_loader,
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   491
                         vmSymbols::checkPackageAccess_name(),
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   492
                         vmSymbols::class_protectiondomain_signature(),
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   493
                         mirror,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   494
                         protection_domain,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   495
                         THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   496
36381
b9ed6bef9364 8149064: TraceProtectionDomainVerification has been converted to Unified Logging.
mockner
parents: 35918
diff changeset
   497
  if (HAS_PENDING_EXCEPTION) {
b9ed6bef9364 8149064: TraceProtectionDomainVerification has been converted to Unified Logging.
mockner
parents: 35918
diff changeset
   498
    log_debug(protectiondomain)("DENIED !!!!!!!!!!!!!!!!!!!!!");
b9ed6bef9364 8149064: TraceProtectionDomainVerification has been converted to Unified Logging.
mockner
parents: 35918
diff changeset
   499
  } else {
b9ed6bef9364 8149064: TraceProtectionDomainVerification has been converted to Unified Logging.
mockner
parents: 35918
diff changeset
   500
   log_debug(protectiondomain)("granted");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   501
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
  if (HAS_PENDING_EXCEPTION) return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   504
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
  // If no exception has been thrown, we have validated the protection domain
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
  // Insert the protection domain of the initiating class into the set.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
  {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   508
    ClassLoaderData* loader_data = class_loader_data(class_loader);
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   509
    Dictionary* dictionary = loader_data->dictionary();
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   510
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   511
    Symbol*  kn = klass->name();
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   512
    unsigned int d_hash = dictionary->compute_hash(kn);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   513
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
    MutexLocker mu(SystemDictionary_lock, THREAD);
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
   515
    int d_index = dictionary->hash_to_index(d_hash);
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   516
    dictionary->add_protection_domain(d_index, d_hash, klass,
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   517
                                      protection_domain, THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   518
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   520
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
// We only get here if this thread finds that another thread
489c9b5090e2 Initial load
duke
parents:
diff changeset
   522
// has already claimed the placeholder token for the current operation,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   523
// but that other thread either never owned or gave up the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   524
// object lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   525
// Waits on SystemDictionary_lock to indicate placeholder table updated
489c9b5090e2 Initial load
duke
parents:
diff changeset
   526
// On return, caller must recheck placeholder table state
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   528
// We only get here if
489c9b5090e2 Initial load
duke
parents:
diff changeset
   529
//  1) custom classLoader, i.e. not bootstrap classloader
49037
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
   530
//  2) custom classLoader has broken the class loader objectLock
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   531
//     so another thread got here in parallel
489c9b5090e2 Initial load
duke
parents:
diff changeset
   532
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   533
// lockObject must be held.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
// Complicated dance due to lock ordering:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   535
// Must first release the classloader object lock to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
// allow initial definer to complete the class definition
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
// and to avoid deadlock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   538
// Reclaim classloader lock object with same original recursion count
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
// Must release SystemDictionary_lock after notify, since
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
// class loader lock must be claimed before SystemDictionary_lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   541
// to prevent deadlocks
489c9b5090e2 Initial load
duke
parents:
diff changeset
   542
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
// The notify allows applications that did an untimed wait() on
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
// the classloader object lock to not hang.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
void SystemDictionary::double_lock_wait(Handle lockObject, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
  assert_lock_strong(SystemDictionary_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
489c9b5090e2 Initial load
duke
parents:
diff changeset
   548
  bool calledholdinglock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   549
      = ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, lockObject);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   550
  assert(calledholdinglock,"must hold lock for notify");
49658
8237a91c1cca 8199781: Don't use naked == for comparing oops
rkennke
parents: 49641
diff changeset
   551
  assert((!oopDesc::equals(lockObject(), _system_loader_lock_obj) && !is_parallelCapable(lockObject)), "unexpected double_lock_wait");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
  ObjectSynchronizer::notifyall(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   553
  intptr_t recursions =  ObjectSynchronizer::complete_exit(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   554
  SystemDictionary_lock->wait();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
  SystemDictionary_lock->unlock();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   556
  ObjectSynchronizer::reenter(lockObject, recursions, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
  SystemDictionary_lock->lock();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   558
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   559
489c9b5090e2 Initial load
duke
parents:
diff changeset
   560
// If the class in is in the placeholder table, class loading is in progress
489c9b5090e2 Initial load
duke
parents:
diff changeset
   561
// For cases where the application changes threads to load classes, it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   562
// is critical to ClassCircularity detection that we try loading
489c9b5090e2 Initial load
duke
parents:
diff changeset
   563
// the superclass on the same thread internally, so we do parallel
489c9b5090e2 Initial load
duke
parents:
diff changeset
   564
// super class loading here.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   565
// This also is critical in cases where the original thread gets stalled
489c9b5090e2 Initial load
duke
parents:
diff changeset
   566
// even in non-circularity situations.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   567
// Note: must call resolve_super_or_fail even if null super -
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   568
// to force placeholder entry creation for this class for circularity detection
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   569
// Caller must check for pending exception
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   570
// Returns non-null Klass* if other thread has completed load
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   571
// and we are done,
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   572
// If return null Klass* and no pending exception, the caller must load the class
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   573
InstanceKlass* SystemDictionary::handle_parallel_super_load(
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   574
    Symbol* name, Symbol* superclassname, Handle class_loader,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   575
    Handle protection_domain, Handle lockObject, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   576
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   577
  ClassLoaderData* loader_data = class_loader_data(class_loader);
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   578
  Dictionary* dictionary = loader_data->dictionary();
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   579
  unsigned int d_hash = dictionary->compute_hash(name);
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   580
  unsigned int p_hash = placeholders()->compute_hash(name);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   581
  int p_index = placeholders()->hash_to_index(p_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   582
489c9b5090e2 Initial load
duke
parents:
diff changeset
   583
  // superk is not used, resolve_super called for circularity check only
489c9b5090e2 Initial load
duke
parents:
diff changeset
   584
  // This code is reached in two situations. One if this thread
489c9b5090e2 Initial load
duke
parents:
diff changeset
   585
  // is loading the same class twice (e.g. ClassCircularity, or
489c9b5090e2 Initial load
duke
parents:
diff changeset
   586
  // java.lang.instrument).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   587
  // The second is if another thread started the resolve_super first
489c9b5090e2 Initial load
duke
parents:
diff changeset
   588
  // and has not yet finished.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   589
  // In both cases the original caller will clean up the placeholder
489c9b5090e2 Initial load
duke
parents:
diff changeset
   590
  // entry on error.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   591
  Klass* superk = SystemDictionary::resolve_super_or_fail(name,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   592
                                                          superclassname,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   593
                                                          class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   594
                                                          protection_domain,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   595
                                                          true,
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   596
                                                          CHECK_NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   597
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   598
  // parallelCapable class loaders do NOT wait for parallel superclass loads to complete
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   599
  // Serial class loaders and bootstrap classloader do wait for superclass loads
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   600
 if (!class_loader.is_null() && is_parallelCapable(class_loader)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   601
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   602
    // Check if classloading completed while we were loading superclass or waiting
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
   603
    return find_class(d_hash, name, dictionary);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   604
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   605
489c9b5090e2 Initial load
duke
parents:
diff changeset
   606
  // must loop to both handle other placeholder updates
489c9b5090e2 Initial load
duke
parents:
diff changeset
   607
  // and spurious notifications
489c9b5090e2 Initial load
duke
parents:
diff changeset
   608
  bool super_load_in_progress = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   609
  PlaceholderEntry* placeholder;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   610
  while (super_load_in_progress) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   611
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   612
    // Check if classloading completed while we were loading superclass or waiting
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
   613
    InstanceKlass* check = find_class(d_hash, name, dictionary);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   614
    if (check != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   615
      // Klass is already loaded, so just return it
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   616
      return check;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   617
    } else {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   618
      placeholder = placeholders()->get_entry(p_index, p_hash, name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   619
      if (placeholder && placeholder->super_load_in_progress() ){
489c9b5090e2 Initial load
duke
parents:
diff changeset
   620
        // We only get here if the application has released the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   621
        // classloader lock when another thread was in the middle of loading a
489c9b5090e2 Initial load
duke
parents:
diff changeset
   622
        // superclass/superinterface for this class, and now
489c9b5090e2 Initial load
duke
parents:
diff changeset
   623
        // this thread is also trying to load this class.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   624
        // To minimize surprises, the first thread that started to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   625
        // load a class should be the one to complete the loading
489c9b5090e2 Initial load
duke
parents:
diff changeset
   626
        // with the classfile it initially expected.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   627
        // This logic has the current thread wait once it has done
489c9b5090e2 Initial load
duke
parents:
diff changeset
   628
        // all the superclass/superinterface loading it can, until
489c9b5090e2 Initial load
duke
parents:
diff changeset
   629
        // the original thread completes the class loading or fails
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   630
        // If it completes we will use the resulting InstanceKlass
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   631
        // which we will find below in the systemDictionary.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   632
        // We also get here for parallel bootstrap classloader
489c9b5090e2 Initial load
duke
parents:
diff changeset
   633
        if (class_loader.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   634
          SystemDictionary_lock->wait();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   635
        } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   636
          double_lock_wait(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   637
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   638
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   639
        // If not in SD and not in PH, other thread's load must have failed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   640
        super_load_in_progress = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   641
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   642
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   643
  }
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   644
  return NULL;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   645
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   646
50113
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
   647
static void post_class_load_event(EventClassLoad* event, const InstanceKlass* k, const ClassLoaderData* init_cld) {
46994
7663ce98384b 8179040: Avoid Ticks::now calls when EventClassLoad is not enabled
redestad
parents: 46747
diff changeset
   648
  assert(event != NULL, "invariant");
7663ce98384b 8179040: Avoid Ticks::now calls when EventClassLoad is not enabled
redestad
parents: 46747
diff changeset
   649
  assert(k != NULL, "invariant");
50113
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
   650
  assert(event->should_commit(), "invariant");
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
   651
  event->set_loadedClass(k);
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
   652
  event->set_definingClassLoader(k->class_loader_data());
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
   653
  event->set_initiatingClassLoader(init_cld);
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
   654
  event->commit();
34666
1c7168ea0034 8140485: Class load and creation cleanup
mgronlun
parents: 34317
diff changeset
   655
}
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   656
40002
156b2dbb0b54 8038332: The trace event vm/class/load is not always being sent
mockner
parents: 39986
diff changeset
   657
40016
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
   658
// Be careful when modifying this code: once you have run
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
   659
// placeholders()->find_and_add(PlaceholderTable::LOAD_INSTANCE),
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
   660
// you need to find_and_remove it before returning.
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
   661
// So be careful to not exit with a CHECK_ macro betweeen these calls.
51329
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   662
//
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   663
// name must be in the form of "java/lang/Object" -- cannot be "Ljava/lang/Object;"
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   664
InstanceKlass* SystemDictionary::resolve_instance_class_or_null(Symbol* name,
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   665
                                                                Handle class_loader,
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   666
                                                                Handle protection_domain,
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   667
                                                                TRAPS) {
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   668
  assert(name != NULL && !FieldType::is_array(name) &&
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   669
         !FieldType::is_obj(name), "invalid class name");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   670
46994
7663ce98384b 8179040: Avoid Ticks::now calls when EventClassLoad is not enabled
redestad
parents: 46747
diff changeset
   671
  EventClassLoad class_load_start_event;
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
   672
46271
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
   673
  HandleMark hm(THREAD);
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
   674
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   675
  // Fix for 4474172; see evaluation for more details
489c9b5090e2 Initial load
duke
parents:
diff changeset
   676
  class_loader = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(class_loader()));
49348
fde3feaaa4ed 8198926: Move ClassLoaderData::_dependencies to ClassLoaderData::_handles
coleenp
parents: 49340
diff changeset
   677
  ClassLoaderData* loader_data = register_loader(class_loader);
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   678
  Dictionary* dictionary = loader_data->dictionary();
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
   679
  unsigned int d_hash = dictionary->compute_hash(name);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   680
489c9b5090e2 Initial load
duke
parents:
diff changeset
   681
  // Do lookup to see if class already exist and the protection domain
489c9b5090e2 Initial load
duke
parents:
diff changeset
   682
  // has the right access
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   683
  // This call uses find which checks protection domain already matches
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   684
  // All subsequent calls use find_class, and set has_loaded_class so that
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   685
  // before we return a result we call out to java to check for valid protection domain
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   686
  // to allow returning the Klass* and add it to the pd_set if it is valid
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
   687
  {
51329
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   688
    InstanceKlass* probe = dictionary->find(d_hash, name, protection_domain);
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
   689
    if (probe != NULL) return probe;
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
   690
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   691
489c9b5090e2 Initial load
duke
parents:
diff changeset
   692
  // Non-bootstrap class loaders will call out to class loader and
489c9b5090e2 Initial load
duke
parents:
diff changeset
   693
  // define via jvm/jni_DefineClass which will acquire the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   694
  // class loader object lock to protect against multiple threads
489c9b5090e2 Initial load
duke
parents:
diff changeset
   695
  // defining the class in parallel by accident.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   696
  // This lock must be acquired here so the waiter will find
489c9b5090e2 Initial load
duke
parents:
diff changeset
   697
  // any successful result in the SystemDictionary and not attempt
49037
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
   698
  // the define.
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
   699
  // ParallelCapable Classloaders and the bootstrap classloader
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
   700
  // do not acquire lock here.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   701
  bool DoObjectLock = true;
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   702
  if (is_parallelCapable(class_loader)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   703
    DoObjectLock = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   704
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   705
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   706
  unsigned int p_hash = placeholders()->compute_hash(name);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   707
  int p_index = placeholders()->hash_to_index(p_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   708
489c9b5090e2 Initial load
duke
parents:
diff changeset
   709
  // Class is not in SystemDictionary so we have to do loading.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   710
  // Make sure we are synchronized on the class loader before we proceed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   711
  Handle lockObject = compute_loader_lock_object(class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   712
  check_loader_lock_contention(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   713
  ObjectLocker ol(lockObject, THREAD, DoObjectLock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   714
489c9b5090e2 Initial load
duke
parents:
diff changeset
   715
  // Check again (after locking) if class already exist in SystemDictionary
489c9b5090e2 Initial load
duke
parents:
diff changeset
   716
  bool class_has_been_loaded   = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   717
  bool super_load_in_progress  = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   718
  bool havesupername = false;
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   719
  InstanceKlass* k = NULL;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   720
  PlaceholderEntry* placeholder;
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   721
  Symbol* superclassname = NULL;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   722
50735
2f2af62dfac7 8010319: Implementation of JEP 181: Nest-Based Access Control
dholmes
parents: 50634
diff changeset
   723
  assert(THREAD->can_call_java(),
2f2af62dfac7 8010319: Implementation of JEP 181: Nest-Based Access Control
dholmes
parents: 50634
diff changeset
   724
         "can not load classes with compiler thread: class=%s, classloader=%s",
2f2af62dfac7 8010319: Implementation of JEP 181: Nest-Based Access Control
dholmes
parents: 50634
diff changeset
   725
         name->as_C_string(),
2f2af62dfac7 8010319: Implementation of JEP 181: Nest-Based Access Control
dholmes
parents: 50634
diff changeset
   726
         class_loader.is_null() ? "null" : class_loader->klass()->name()->as_C_string());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   727
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   728
    MutexLocker mu(SystemDictionary_lock, THREAD);
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
   729
    InstanceKlass* check = find_class(d_hash, name, dictionary);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   730
    if (check != NULL) {
51329
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   731
      // InstanceKlass is already loaded, so just return it
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   732
      class_has_been_loaded = true;
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   733
      k = check;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   734
    } else {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   735
      placeholder = placeholders()->get_entry(p_index, p_hash, name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   736
      if (placeholder && placeholder->super_load_in_progress()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   737
         super_load_in_progress = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   738
         if (placeholder->havesupername() == true) {
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   739
           superclassname = placeholder->supername();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   740
           havesupername = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   741
         }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   742
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   743
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   744
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   745
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   746
  // If the class is in the placeholder table, class loading is in progress
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   747
  if (super_load_in_progress && havesupername==true) {
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   748
    k = handle_parallel_super_load(name,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   749
                                   superclassname,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   750
                                   class_loader,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   751
                                   protection_domain,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   752
                                   lockObject, THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   753
    if (HAS_PENDING_EXCEPTION) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   754
      return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   755
    }
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   756
    if (k != NULL) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   757
      class_has_been_loaded = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   758
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   759
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   760
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   761
  bool throw_circularity_error = false;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   762
  if (!class_has_been_loaded) {
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   763
    bool load_instance_added = false;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   764
489c9b5090e2 Initial load
duke
parents:
diff changeset
   765
    // add placeholder entry to record loading instance class
489c9b5090e2 Initial load
duke
parents:
diff changeset
   766
    // Five cases:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   767
    // All cases need to prevent modifying bootclasssearchpath
489c9b5090e2 Initial load
duke
parents:
diff changeset
   768
    // in parallel with a classload of same classname
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   769
    // Redefineclasses uses existence of the placeholder for the duration
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   770
    // of the class load to prevent concurrent redefinition of not completely
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   771
    // defined classes.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   772
    // case 1. traditional classloaders that rely on the classloader object lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   773
    //   - no other need for LOAD_INSTANCE
489c9b5090e2 Initial load
duke
parents:
diff changeset
   774
    // case 2. traditional classloaders that break the classloader object lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   775
    //    as a deadlock workaround. Detection of this case requires that
489c9b5090e2 Initial load
duke
parents:
diff changeset
   776
    //    this check is done while holding the classloader object lock,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   777
    //    and that lock is still held when calling classloader's loadClass.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   778
    //    For these classloaders, we ensure that the first requestor
489c9b5090e2 Initial load
duke
parents:
diff changeset
   779
    //    completes the load and other requestors wait for completion.
49037
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
   780
    // case 3. Bootstrap classloader - don't own objectLocker
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   781
    //    This classloader supports parallelism at the classloader level,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   782
    //    but only allows a single load of a class/classloader pair.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   783
    //    No performance benefit and no deadlock issues.
49037
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
   784
    // case 4. parallelCapable user level classloaders - without objectLocker
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   785
    //    Allow parallel classloading of a class/classloader pair
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   786
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   787
    {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   788
      MutexLocker mu(SystemDictionary_lock, THREAD);
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   789
      if (class_loader.is_null() || !is_parallelCapable(class_loader)) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   790
        PlaceholderEntry* oldprobe = placeholders()->get_entry(p_index, p_hash, name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   791
        if (oldprobe) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   792
          // only need check_seen_thread once, not on each loop
489c9b5090e2 Initial load
duke
parents:
diff changeset
   793
          // 6341374 java/lang/Instrument with -Xcomp
489c9b5090e2 Initial load
duke
parents:
diff changeset
   794
          if (oldprobe->check_seen_thread(THREAD, PlaceholderTable::LOAD_INSTANCE)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   795
            throw_circularity_error = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   796
          } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   797
            // case 1: traditional: should never see load_in_progress.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   798
            while (!class_has_been_loaded && oldprobe && oldprobe->instance_load_in_progress()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   799
49037
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
   800
              // case 3: bootstrap classloader: prevent futile classloading,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   801
              // wait on first requestor
489c9b5090e2 Initial load
duke
parents:
diff changeset
   802
              if (class_loader.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   803
                SystemDictionary_lock->wait();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   804
              } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   805
              // case 2: traditional with broken classloader lock. wait on first
489c9b5090e2 Initial load
duke
parents:
diff changeset
   806
              // requestor.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   807
                double_lock_wait(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   808
              }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   809
              // Check if classloading completed while we were waiting
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
   810
              InstanceKlass* check = find_class(d_hash, name, dictionary);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   811
              if (check != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   812
                // Klass is already loaded, so just return it
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   813
                k = check;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   814
                class_has_been_loaded = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   815
              }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   816
              // check if other thread failed to load and cleaned up
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   817
              oldprobe = placeholders()->get_entry(p_index, p_hash, name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   818
            }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   819
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   820
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   821
      }
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   822
      // All cases: add LOAD_INSTANCE holding SystemDictionary_lock
49037
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
   823
      // case 4: parallelCapable: allow competing threads to try
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   824
      // LOAD_INSTANCE in parallel
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   825
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   826
      if (!throw_circularity_error && !class_has_been_loaded) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   827
        PlaceholderEntry* newprobe = placeholders()->find_and_add(p_index, p_hash, name, loader_data, PlaceholderTable::LOAD_INSTANCE, NULL, THREAD);
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   828
        load_instance_added = true;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   829
        // For class loaders that do not acquire the classloader object lock,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   830
        // if they did not catch another thread holding LOAD_INSTANCE,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   831
        // need a check analogous to the acquire ObjectLocker/find_class
489c9b5090e2 Initial load
duke
parents:
diff changeset
   832
        // i.e. now that we hold the LOAD_INSTANCE token on loading this class/CL
489c9b5090e2 Initial load
duke
parents:
diff changeset
   833
        // one final check if the load has already completed
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   834
        // class loaders holding the ObjectLock shouldn't find the class here
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
   835
        InstanceKlass* check = find_class(d_hash, name, dictionary);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   836
        if (check != NULL) {
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   837
        // Klass is already loaded, so return it after checking/adding protection domain
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   838
          k = check;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   839
          class_has_been_loaded = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   840
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   841
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   842
    }
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   843
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   844
    // must throw error outside of owning lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   845
    if (throw_circularity_error) {
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   846
      assert(!HAS_PENDING_EXCEPTION && load_instance_added == false,"circularity error cleanup");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   847
      ResourceMark rm(THREAD);
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   848
      THROW_MSG_NULL(vmSymbols::java_lang_ClassCircularityError(), name->as_C_string());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   849
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   850
489c9b5090e2 Initial load
duke
parents:
diff changeset
   851
    if (!class_has_been_loaded) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   852
489c9b5090e2 Initial load
duke
parents:
diff changeset
   853
      // Do actual loading
489c9b5090e2 Initial load
duke
parents:
diff changeset
   854
      k = load_instance_class(name, class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   855
489c9b5090e2 Initial load
duke
parents:
diff changeset
   856
      // If everything was OK (no exceptions, no null return value), and
489c9b5090e2 Initial load
duke
parents:
diff changeset
   857
      // class_loader is NOT the defining loader, do a little more bookkeeping.
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   858
      if (!HAS_PENDING_EXCEPTION && k != NULL &&
49658
8237a91c1cca 8199781: Don't use naked == for comparing oops
rkennke
parents: 49641
diff changeset
   859
        !oopDesc::equals(k->class_loader(), class_loader())) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   860
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
   861
        check_constraints(d_hash, k, class_loader, false, THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   862
489c9b5090e2 Initial load
duke
parents:
diff changeset
   863
        // Need to check for a PENDING_EXCEPTION again; check_constraints
53322
8ba5b3c76857 8210094: Better loading of classloader classes
coleenp
parents: 52587
diff changeset
   864
        // can throw but we may have to remove entry from the placeholder table below.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   865
        if (!HAS_PENDING_EXCEPTION) {
53322
8ba5b3c76857 8210094: Better loading of classloader classes
coleenp
parents: 52587
diff changeset
   866
          // Record dependency for non-parent delegation.
8ba5b3c76857 8210094: Better loading of classloader classes
coleenp
parents: 52587
diff changeset
   867
          // This recording keeps the defining class loader of the klass (k) found
8ba5b3c76857 8210094: Better loading of classloader classes
coleenp
parents: 52587
diff changeset
   868
          // from being unloaded while the initiating class loader is loaded
8ba5b3c76857 8210094: Better loading of classloader classes
coleenp
parents: 52587
diff changeset
   869
          // even if the reference to the defining class loader is dropped
8ba5b3c76857 8210094: Better loading of classloader classes
coleenp
parents: 52587
diff changeset
   870
          // before references to the initiating class loader.
8ba5b3c76857 8210094: Better loading of classloader classes
coleenp
parents: 52587
diff changeset
   871
          loader_data->record_dependency(k);
8ba5b3c76857 8210094: Better loading of classloader classes
coleenp
parents: 52587
diff changeset
   872
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   873
          { // Grabbing the Compile_lock prevents systemDictionary updates
489c9b5090e2 Initial load
duke
parents:
diff changeset
   874
            // during compilations.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   875
            MutexLocker mu(Compile_lock, THREAD);
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
   876
            update_dictionary(d_hash, p_index, p_hash,
47103
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
   877
              k, class_loader, THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   878
          }
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
   879
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   880
          if (JvmtiExport::should_post_class_load()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   881
            Thread *thread = THREAD;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   882
            assert(thread->is_Java_thread(), "thread->is_Java_thread()");
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   883
            JvmtiExport::post_class_load((JavaThread *) thread, k);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   884
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   885
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   886
      }
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   887
    } // load_instance_class
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   888
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   889
    if (load_instance_added == true) {
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   890
      // clean up placeholder entries for LOAD_INSTANCE success or error
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   891
      // This brackets the SystemDictionary updates for both defining
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   892
      // and initiating loaders
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   893
      MutexLocker mu(SystemDictionary_lock, THREAD);
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
   894
      placeholders()->find_and_remove(p_index, p_hash, name, loader_data, PlaceholderTable::LOAD_INSTANCE, THREAD);
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
   895
      SystemDictionary_lock->notify_all();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   896
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   897
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   898
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   899
  if (HAS_PENDING_EXCEPTION || k == NULL) {
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   900
    return NULL;
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   901
  }
50113
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
   902
  if (class_load_start_event.should_commit()) {
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
   903
    post_class_load_event(&class_load_start_event, k, loader_data);
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
   904
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   905
#ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   906
  {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   907
    ClassLoaderData* loader_data = k->class_loader_data();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   908
    MutexLocker mu(SystemDictionary_lock, THREAD);
51329
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
   909
    InstanceKlass* kk = find_class(name, loader_data);
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   910
    assert(kk == k, "should be present in dictionary");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   911
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   912
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   913
489c9b5090e2 Initial load
duke
parents:
diff changeset
   914
  // return if the protection domain in NULL
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   915
  if (protection_domain() == NULL) return k;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   916
489c9b5090e2 Initial load
duke
parents:
diff changeset
   917
  // Check the protection domain has the right access
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
   918
  if (dictionary->is_valid_protection_domain(d_hash, name,
47098
e704f55561c3 8164207: Checking missing load-acquire in relation to _pd_set in dictionary.cpp
coleenp
parents: 46994
diff changeset
   919
                                             protection_domain)) {
e704f55561c3 8164207: Checking missing load-acquire in relation to _pd_set in dictionary.cpp
coleenp
parents: 46994
diff changeset
   920
    return k;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   921
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   922
489c9b5090e2 Initial load
duke
parents:
diff changeset
   923
  // Verify protection domain. If it fails an exception is thrown
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   924
  validate_protection_domain(k, class_loader, protection_domain, CHECK_NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   925
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   926
  return k;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   927
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   928
489c9b5090e2 Initial load
duke
parents:
diff changeset
   929
489c9b5090e2 Initial load
duke
parents:
diff changeset
   930
// This routine does not lock the system dictionary.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   931
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   932
// Since readers don't hold a lock, we must make sure that system
489c9b5090e2 Initial load
duke
parents:
diff changeset
   933
// dictionary entries are only removed at a safepoint (when only one
489c9b5090e2 Initial load
duke
parents:
diff changeset
   934
// thread is running), and are added to in a safe way (all links must
489c9b5090e2 Initial load
duke
parents:
diff changeset
   935
// be updated in an MT-safe manner).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   936
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   937
// Callers should be aware that an entry could be added just after
489c9b5090e2 Initial load
duke
parents:
diff changeset
   938
// _dictionary->bucket(index) is read here, so the caller will not see
489c9b5090e2 Initial load
duke
parents:
diff changeset
   939
// the new entry.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   940
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   941
Klass* SystemDictionary::find(Symbol* class_name,
15847
f9ce2cd20dee 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents: 15432
diff changeset
   942
                              Handle class_loader,
f9ce2cd20dee 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents: 15432
diff changeset
   943
                              Handle protection_domain,
f9ce2cd20dee 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents: 15432
diff changeset
   944
                              TRAPS) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   945
2020
68d27ca96f33 6790209: server VM fails with assert(will_link,"_new: typeflow responsibility")
kvn
parents: 1550
diff changeset
   946
  // The result of this call should be consistent with the result
68d27ca96f33 6790209: server VM fails with assert(will_link,"_new: typeflow responsibility")
kvn
parents: 1550
diff changeset
   947
  // of the call to resolve_instance_class_or_null().
68d27ca96f33 6790209: server VM fails with assert(will_link,"_new: typeflow responsibility")
kvn
parents: 1550
diff changeset
   948
  // See evaluation 6790209 and 4474172 for more details.
68d27ca96f33 6790209: server VM fails with assert(will_link,"_new: typeflow responsibility")
kvn
parents: 1550
diff changeset
   949
  class_loader = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(class_loader()));
15847
f9ce2cd20dee 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents: 15432
diff changeset
   950
  ClassLoaderData* loader_data = ClassLoaderData::class_loader_data_or_null(class_loader());
f9ce2cd20dee 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents: 15432
diff changeset
   951
f9ce2cd20dee 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents: 15432
diff changeset
   952
  if (loader_data == NULL) {
f9ce2cd20dee 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents: 15432
diff changeset
   953
    // If the ClassLoaderData has not been setup,
f9ce2cd20dee 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents: 15432
diff changeset
   954
    // then the class loader has no entries in the dictionary.
f9ce2cd20dee 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents: 15432
diff changeset
   955
    return NULL;
f9ce2cd20dee 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents: 15432
diff changeset
   956
  }
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   957
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   958
  Dictionary* dictionary = loader_data->dictionary();
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   959
  unsigned int d_hash = dictionary->compute_hash(class_name);
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
   960
  return dictionary->find(d_hash, class_name,
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
   961
                          protection_domain);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   962
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   963
489c9b5090e2 Initial load
duke
parents:
diff changeset
   964
489c9b5090e2 Initial load
duke
parents:
diff changeset
   965
// Look for a loaded instance or array klass by name.  Do not do any loading.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   966
// return NULL in case of error.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   967
Klass* SystemDictionary::find_instance_or_array_klass(Symbol* class_name,
13952
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
   968
                                                      Handle class_loader,
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
   969
                                                      Handle protection_domain,
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
   970
                                                      TRAPS) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   971
  Klass* k = NULL;
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   972
  assert(class_name != NULL, "class name must be non NULL");
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
   973
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   974
  if (FieldType::is_array(class_name)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   975
    // The name refers to an array.  Parse the name.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   976
    // dimension and object_key in FieldArrayInfo are assigned as a
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   977
    // side-effect of this call
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   978
    FieldArrayInfo fd;
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   979
    BasicType t = FieldType::get_array_info(class_name, fd, CHECK_(NULL));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   980
    if (t != T_OBJECT) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   981
      k = Universe::typeArrayKlassObj(t);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   982
    } else {
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   983
      k = SystemDictionary::find(fd.object_key(), class_loader, protection_domain, THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   984
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   985
    if (k != NULL) {
14488
ab48109f7d1b 8001471: Klass::cast() does nothing
hseigel
parents: 14077
diff changeset
   986
      k = k->array_klass_or_null(fd.dimension());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   987
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   988
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   989
    k = find(class_name, class_loader, protection_domain, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   990
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   991
  return k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   992
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   993
489c9b5090e2 Initial load
duke
parents:
diff changeset
   994
// Note: this method is much like resolve_from_stream, but
40016
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
   995
// does not publish the classes via the SystemDictionary.
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
   996
// Handles unsafe_DefineAnonymousClass and redefineclasses
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
   997
// RedefinedClasses do not add to the class hierarchy
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   998
InstanceKlass* SystemDictionary::parse_stream(Symbol* class_name,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
   999
                                              Handle class_loader,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1000
                                              Handle protection_domain,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1001
                                              ClassFileStream* st,
51444
3e5d28e6de32 8209301: JVM rename is_anonymous, host_klass to unsafe specific terminology ahead of Unsafe.defineAnonymousClass deprecation
lfoltan
parents: 51415
diff changeset
  1002
                                              const InstanceKlass* unsafe_anonymous_host,
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1003
                                              GrowableArray<Handle>* cp_patches,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1004
                                              TRAPS) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1005
46994
7663ce98384b 8179040: Avoid Ticks::now calls when EventClassLoad is not enabled
redestad
parents: 46747
diff changeset
  1006
  EventClassLoad class_load_start_event;
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  1007
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  1008
  ClassLoaderData* loader_data;
51444
3e5d28e6de32 8209301: JVM rename is_anonymous, host_klass to unsafe specific terminology ahead of Unsafe.defineAnonymousClass deprecation
lfoltan
parents: 51415
diff changeset
  1009
  if (unsafe_anonymous_host != NULL) {
3e5d28e6de32 8209301: JVM rename is_anonymous, host_klass to unsafe specific terminology ahead of Unsafe.defineAnonymousClass deprecation
lfoltan
parents: 51415
diff changeset
  1010
    // Create a new CLD for an unsafe anonymous class, that uses the same class loader
3e5d28e6de32 8209301: JVM rename is_anonymous, host_klass to unsafe specific terminology ahead of Unsafe.defineAnonymousClass deprecation
lfoltan
parents: 51415
diff changeset
  1011
    // as the unsafe_anonymous_host
3e5d28e6de32 8209301: JVM rename is_anonymous, host_klass to unsafe specific terminology ahead of Unsafe.defineAnonymousClass deprecation
lfoltan
parents: 51415
diff changeset
  1012
    guarantee(oopDesc::equals(unsafe_anonymous_host->class_loader(), class_loader()), "should be the same");
3e5d28e6de32 8209301: JVM rename is_anonymous, host_klass to unsafe specific terminology ahead of Unsafe.defineAnonymousClass deprecation
lfoltan
parents: 51415
diff changeset
  1013
    loader_data = ClassLoaderData::unsafe_anonymous_class_loader_data(class_loader);
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  1014
  } else {
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  1015
    loader_data = ClassLoaderData::class_loader_data(class_loader());
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  1016
  }
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  1017
34666
1c7168ea0034 8140485: Class load and creation cleanup
mgronlun
parents: 34317
diff changeset
  1018
  assert(st != NULL, "invariant");
1c7168ea0034 8140485: Class load and creation cleanup
mgronlun
parents: 34317
diff changeset
  1019
  assert(st->need_verify(), "invariant");
1c7168ea0034 8140485: Class load and creation cleanup
mgronlun
parents: 34317
diff changeset
  1020
1c7168ea0034 8140485: Class load and creation cleanup
mgronlun
parents: 34317
diff changeset
  1021
  // Parse stream and create a klass.
1c7168ea0034 8140485: Class load and creation cleanup
mgronlun
parents: 34317
diff changeset
  1022
  // Note that we do this even though this klass might
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1023
  // already be present in the SystemDictionary, otherwise we would not
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1024
  // throw potential ClassFormatErrors.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1025
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1026
  InstanceKlass* k = KlassFactory::create_from_stream(st,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1027
                                                      class_name,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1028
                                                      loader_data,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1029
                                                      protection_domain,
51444
3e5d28e6de32 8209301: JVM rename is_anonymous, host_klass to unsafe specific terminology ahead of Unsafe.defineAnonymousClass deprecation
lfoltan
parents: 51415
diff changeset
  1030
                                                      unsafe_anonymous_host,
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1031
                                                      cp_patches,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1032
                                                      CHECK_NULL);
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1033
51444
3e5d28e6de32 8209301: JVM rename is_anonymous, host_klass to unsafe specific terminology ahead of Unsafe.defineAnonymousClass deprecation
lfoltan
parents: 51415
diff changeset
  1034
  if (unsafe_anonymous_host != NULL && k != NULL) {
3e5d28e6de32 8209301: JVM rename is_anonymous, host_klass to unsafe specific terminology ahead of Unsafe.defineAnonymousClass deprecation
lfoltan
parents: 51415
diff changeset
  1035
    // Unsafe anonymous classes must update ClassLoaderData holder (was unsafe_anonymous_host loader)
49738
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49658
diff changeset
  1036
    // so that they can be unloaded when the mirror is no longer referenced.
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49658
diff changeset
  1037
    k->class_loader_data()->initialize_holder(Handle(THREAD, k->java_mirror()));
1550
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1038
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1039
    {
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1040
      MutexLocker mu_r(Compile_lock, THREAD);
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1041
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1042
      // Add to class hierarchy, initialize vtables, and do possible
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1043
      // deoptimizations.
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1044
      add_to_hierarchy(k, CHECK_NULL); // No exception, but can block
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1045
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1046
      // But, do not add to dictionary.
22231
1cca24bb3125 8029383: assert(counter_changed) failed: failed dependencies, but counter didn't change
roland
parents: 21767
diff changeset
  1047
1cca24bb3125 8029383: assert(counter_changed) failed: failed dependencies, but counter didn't change
roland
parents: 21767
diff changeset
  1048
      // compiled code dependencies need to be validated anyway
1cca24bb3125 8029383: assert(counter_changed) failed: failed dependencies, but counter didn't change
roland
parents: 21767
diff changeset
  1049
      notice_modification();
1550
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1050
    }
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1051
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1052
    // Rewrite and patch constant pool here.
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  1053
    k->link_class(CHECK_NULL);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1054
    if (cp_patches != NULL) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1055
      k->constants()->patch_resolved_references(cp_patches);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1056
    }
49738
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49658
diff changeset
  1057
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49658
diff changeset
  1058
    // If it's anonymous, initialize it now, since nobody else will.
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  1059
    k->eager_initialize(CHECK_NULL);
1550
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1060
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1061
    // notify jvmti
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1062
    if (JvmtiExport::should_post_class_load()) {
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1063
        assert(THREAD->is_Java_thread(), "thread->is_Java_thread()");
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1064
        JvmtiExport::post_class_load((JavaThread *) THREAD, k);
1550
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1065
    }
50113
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
  1066
    if (class_load_start_event.should_commit()) {
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
  1067
      post_class_load_event(&class_load_start_event, k, loader_data);
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
  1068
    }
1550
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1069
  }
51444
3e5d28e6de32 8209301: JVM rename is_anonymous, host_klass to unsafe specific terminology ahead of Unsafe.defineAnonymousClass deprecation
lfoltan
parents: 51415
diff changeset
  1070
  assert(unsafe_anonymous_host != NULL || NULL == cp_patches,
3e5d28e6de32 8209301: JVM rename is_anonymous, host_klass to unsafe specific terminology ahead of Unsafe.defineAnonymousClass deprecation
lfoltan
parents: 51415
diff changeset
  1071
         "cp_patches only found with unsafe_anonymous_host");
1550
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1072
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1073
  return k;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1074
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1075
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1076
// Add a klass to the system from a stream (called by jni_DefineClass and
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1077
// JVM_DefineClass).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1078
// Note: class_name can be NULL. In that case we do not know the name of
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1079
// the class until we have parsed the stream.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1080
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1081
InstanceKlass* SystemDictionary::resolve_from_stream(Symbol* class_name,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1082
                                                     Handle class_loader,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1083
                                                     Handle protection_domain,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1084
                                                     ClassFileStream* st,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1085
                                                     TRAPS) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1086
46271
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  1087
  HandleMark hm(THREAD);
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  1088
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1089
  // Classloaders that support parallelism, e.g. bootstrap classloader,
49037
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
  1090
  // do not acquire lock here
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1091
  bool DoObjectLock = true;
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1092
  if (is_parallelCapable(class_loader)) {
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1093
    DoObjectLock = false;
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1094
  }
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1095
49348
fde3feaaa4ed 8198926: Move ClassLoaderData::_dependencies to ClassLoaderData::_handles
coleenp
parents: 49340
diff changeset
  1096
  ClassLoaderData* loader_data = register_loader(class_loader);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1097
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1098
  // Make sure we are synchronized on the class loader before we proceed
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1099
  Handle lockObject = compute_loader_lock_object(class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1100
  check_loader_lock_contention(lockObject, THREAD);
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1101
  ObjectLocker ol(lockObject, THREAD, DoObjectLock);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1102
34666
1c7168ea0034 8140485: Class load and creation cleanup
mgronlun
parents: 34317
diff changeset
  1103
  assert(st != NULL, "invariant");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1104
34666
1c7168ea0034 8140485: Class load and creation cleanup
mgronlun
parents: 34317
diff changeset
  1105
  // Parse the stream and create a klass.
1c7168ea0034 8140485: Class load and creation cleanup
mgronlun
parents: 34317
diff changeset
  1106
  // Note that we do this even though this klass might
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1107
  // already be present in the SystemDictionary, otherwise we would not
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1108
  // throw potential ClassFormatErrors.
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1109
 InstanceKlass* k = NULL;
34257
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
iklam
parents: 33612
diff changeset
  1110
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
iklam
parents: 33612
diff changeset
  1111
#if INCLUDE_CDS
47103
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
  1112
  if (!DumpSharedSpaces) {
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
  1113
    k = SystemDictionaryShared::lookup_from_stream(class_name,
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
  1114
                                                   class_loader,
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
  1115
                                                   protection_domain,
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
  1116
                                                   st,
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
  1117
                                                   CHECK_NULL);
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
  1118
  }
34257
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
iklam
parents: 33612
diff changeset
  1119
#endif
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
iklam
parents: 33612
diff changeset
  1120
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1121
  if (k == NULL) {
34257
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
iklam
parents: 33612
diff changeset
  1122
    if (st->buffer() == NULL) {
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
iklam
parents: 33612
diff changeset
  1123
      return NULL;
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
iklam
parents: 33612
diff changeset
  1124
    }
34666
1c7168ea0034 8140485: Class load and creation cleanup
mgronlun
parents: 34317
diff changeset
  1125
    k = KlassFactory::create_from_stream(st,
1c7168ea0034 8140485: Class load and creation cleanup
mgronlun
parents: 34317
diff changeset
  1126
                                         class_name,
1c7168ea0034 8140485: Class load and creation cleanup
mgronlun
parents: 34317
diff changeset
  1127
                                         loader_data,
1c7168ea0034 8140485: Class load and creation cleanup
mgronlun
parents: 34317
diff changeset
  1128
                                         protection_domain,
51444
3e5d28e6de32 8209301: JVM rename is_anonymous, host_klass to unsafe specific terminology ahead of Unsafe.defineAnonymousClass deprecation
lfoltan
parents: 51415
diff changeset
  1129
                                         NULL, // unsafe_anonymous_host
34666
1c7168ea0034 8140485: Class load and creation cleanup
mgronlun
parents: 34317
diff changeset
  1130
                                         NULL, // cp_patches
40016
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
  1131
                                         CHECK_NULL);
34257
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
iklam
parents: 33612
diff changeset
  1132
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1133
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1134
  assert(k != NULL, "no klass created");
40016
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
  1135
  Symbol* h_name = k->name();
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
  1136
  assert(class_name == NULL || class_name == h_name, "name mismatch");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1137
40016
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
  1138
  // Add class just loaded
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
  1139
  // If a class loader supports parallel classloading handle parallel define requests
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
  1140
  // find_or_define_instance_class may return a different InstanceKlass
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
  1141
  if (is_parallelCapable(class_loader)) {
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1142
    InstanceKlass* defined_k = find_or_define_instance_class(h_name, class_loader, k, THREAD);
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1143
    if (!HAS_PENDING_EXCEPTION && defined_k != k) {
43948
26f3c55e246e 8173743: Failures during class definition can lead to memory leaks in metaspace
simonis
parents: 42876
diff changeset
  1144
      // If a parallel capable class loader already defined this class, register 'k' for cleanup.
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1145
      assert(defined_k != NULL, "Should have a klass if there's no exception");
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1146
      loader_data->add_to_deallocate_list(k);
43948
26f3c55e246e 8173743: Failures during class definition can lead to memory leaks in metaspace
simonis
parents: 42876
diff changeset
  1147
      k = defined_k;
42650
1f304d0c888b 8171008: Integrate AOT compiler into JDK
kvn
parents: 42639
diff changeset
  1148
    }
40016
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
  1149
  } else {
43948
26f3c55e246e 8173743: Failures during class definition can lead to memory leaks in metaspace
simonis
parents: 42876
diff changeset
  1150
    define_instance_class(k, THREAD);
26f3c55e246e 8173743: Failures during class definition can lead to memory leaks in metaspace
simonis
parents: 42876
diff changeset
  1151
  }
26f3c55e246e 8173743: Failures during class definition can lead to memory leaks in metaspace
simonis
parents: 42876
diff changeset
  1152
26f3c55e246e 8173743: Failures during class definition can lead to memory leaks in metaspace
simonis
parents: 42876
diff changeset
  1153
  // If defining the class throws an exception register 'k' for cleanup.
26f3c55e246e 8173743: Failures during class definition can lead to memory leaks in metaspace
simonis
parents: 42876
diff changeset
  1154
  if (HAS_PENDING_EXCEPTION) {
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1155
    assert(k != NULL, "Must have an instance klass here!");
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1156
    loader_data->add_to_deallocate_list(k);
43948
26f3c55e246e 8173743: Failures during class definition can lead to memory leaks in metaspace
simonis
parents: 42876
diff changeset
  1157
    return NULL;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1158
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1159
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
  1160
  // Make sure we have an entry in the SystemDictionary on success
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1161
  debug_only( {
40016
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
  1162
    MutexLocker mu(SystemDictionary_lock, THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1163
40016
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
  1164
    Klass* check = find_class(h_name, k->class_loader_data());
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1165
    assert(check == k, "should be present in the dictionary");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1166
  } );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1167
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1168
  return k;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1169
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1170
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1171
#if INCLUDE_CDS
52514
f4e3900c8d08 8213346: Re-implement shared dictionary using CompactHashtable
iklam
parents: 52498
diff changeset
  1172
// Load a class for boot loader from the shared spaces. This also
f4e3900c8d08 8213346: Re-implement shared dictionary using CompactHashtable
iklam
parents: 52498
diff changeset
  1173
// forces the super class and all interfaces to be loaded.
52335
6507eeb6f047 8203953: Rename SystemDictionary::load_shared_class(Symbol*, Handle, TRAPS) to load_shared_boot_class().
jiangli
parents: 52319
diff changeset
  1174
InstanceKlass* SystemDictionary::load_shared_boot_class(Symbol* class_name,
6507eeb6f047 8203953: Rename SystemDictionary::load_shared_class(Symbol*, Handle, TRAPS) to load_shared_boot_class().
jiangli
parents: 52319
diff changeset
  1175
                                                        TRAPS) {
52514
f4e3900c8d08 8213346: Re-implement shared dictionary using CompactHashtable
iklam
parents: 52498
diff changeset
  1176
  InstanceKlass* ik = SystemDictionaryShared::find_builtin_class(class_name);
52335
6507eeb6f047 8203953: Rename SystemDictionary::load_shared_class(Symbol*, Handle, TRAPS) to load_shared_boot_class().
jiangli
parents: 52319
diff changeset
  1177
  if (ik != NULL && ik->is_shared_boot_class()) {
6507eeb6f047 8203953: Rename SystemDictionary::load_shared_class(Symbol*, Handle, TRAPS) to load_shared_boot_class().
jiangli
parents: 52319
diff changeset
  1178
    return load_shared_class(ik, Handle(), Handle(), THREAD);
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1179
  }
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1180
  return NULL;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1181
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1182
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1183
// Check if a shared class can be loaded by the specific classloader:
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1184
//
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1185
// NULL classloader:
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1186
//   - Module class from "modules" jimage. ModuleEntry must be defined in the classloader.
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1187
//   - Class from -Xbootclasspath/a. The class has no defined PackageEntry, or must
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1188
//     be defined in an unnamed module.
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1189
bool SystemDictionary::is_shared_class_visible(Symbol* class_name,
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1190
                                               InstanceKlass* ik,
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1191
                                               Handle class_loader, TRAPS) {
42876
ff8ff9dcccec 8168797: do not load any archived classes from a patched module
jiangli
parents: 42650
diff changeset
  1192
  assert(!ModuleEntryTable::javabase_moduleEntry()->is_patched(),
ff8ff9dcccec 8168797: do not load any archived classes from a patched module
jiangli
parents: 42650
diff changeset
  1193
         "Cannot use sharing if java.base is patched");
39216
40c3d66352ae 8153858: Clean up needed when obtaining the package name from a fully qualified class name
rprotacio
parents: 38709
diff changeset
  1194
  ResourceMark rm;
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1195
  int path_index = ik->shared_classpath_index();
47103
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
  1196
  ClassLoaderData* loader_data = class_loader_data(class_loader);
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
  1197
  if (path_index < 0) {
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
  1198
    // path_index < 0 indicates that the class is intended for a custom loader
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
  1199
    // and should not be loaded by boot/platform/app loaders
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
  1200
    if (loader_data->is_builtin_class_loader_data()) {
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
  1201
      return false;
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
  1202
    } else {
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
  1203
      return true;
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
  1204
    }
a993ec29ec75 8186842: Use Java class loaders for creating the CDS archive
ccheung
parents: 47098
diff changeset
  1205
  }
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1206
  SharedClassPathEntry* ent =
49739
00805b129186 8194812: Extend class-data sharing to support the module path
ccheung
parents: 49738
diff changeset
  1207
            (SharedClassPathEntry*)FileMapInfo::shared_path(path_index);
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1208
  if (!Universe::is_module_initialized()) {
47673
6126617b8508 8185160: -XX:DumpLoadedClassList omits graal classes
iklam
parents: 47614
diff changeset
  1209
    assert(ent != NULL && ent->is_modules_image(),
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1210
           "Loading non-bootstrap classes before the module system is initialized");
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1211
    assert(class_loader.is_null(), "sanity");
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1212
    return true;
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1213
  }
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1214
  // Get the pkg_entry from the classloader
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1215
  TempNewSymbol pkg_name = NULL;
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1216
  PackageEntry* pkg_entry = NULL;
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1217
  ModuleEntry* mod_entry = NULL;
39216
40c3d66352ae 8153858: Clean up needed when obtaining the package name from a fully qualified class name
rprotacio
parents: 38709
diff changeset
  1218
  const char* pkg_string = NULL;
40c3d66352ae 8153858: Clean up needed when obtaining the package name from a fully qualified class name
rprotacio
parents: 38709
diff changeset
  1219
  pkg_name = InstanceKlass::package_from_name(class_name, CHECK_false);
40c3d66352ae 8153858: Clean up needed when obtaining the package name from a fully qualified class name
rprotacio
parents: 38709
diff changeset
  1220
  if (pkg_name != NULL) {
40c3d66352ae 8153858: Clean up needed when obtaining the package name from a fully qualified class name
rprotacio
parents: 38709
diff changeset
  1221
    pkg_string = pkg_name->as_C_string();
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1222
    if (loader_data != NULL) {
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1223
      pkg_entry = loader_data->packages()->lookup_only(pkg_name);
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1224
    }
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1225
    if (pkg_entry != NULL) {
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1226
      mod_entry = pkg_entry->module();
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1227
    }
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1228
  }
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1229
42876
ff8ff9dcccec 8168797: do not load any archived classes from a patched module
jiangli
parents: 42650
diff changeset
  1230
  // If the archived class is from a module that has been patched at runtime,
ff8ff9dcccec 8168797: do not load any archived classes from a patched module
jiangli
parents: 42650
diff changeset
  1231
  // the class cannot be loaded from the archive.
ff8ff9dcccec 8168797: do not load any archived classes from a patched module
jiangli
parents: 42650
diff changeset
  1232
  if (mod_entry != NULL && mod_entry->is_patched()) {
ff8ff9dcccec 8168797: do not load any archived classes from a patched module
jiangli
parents: 42650
diff changeset
  1233
    return false;
ff8ff9dcccec 8168797: do not load any archived classes from a patched module
jiangli
parents: 42650
diff changeset
  1234
  }
ff8ff9dcccec 8168797: do not load any archived classes from a patched module
jiangli
parents: 42650
diff changeset
  1235
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1236
  if (class_loader.is_null()) {
41739
4a4b9f6a4306 8167333: Invalid source path info might be used when creating ClassFileStream after CFLH transforms a shared classes in some cases
jiangli
parents: 41182
diff changeset
  1237
    assert(ent != NULL, "Shared class for NULL classloader must have valid SharedClassPathEntry");
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1238
    // The NULL classloader can load archived class originated from the
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1239
    // "modules" jimage and the -Xbootclasspath/a. For class from the
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1240
    // "modules" jimage, the PackageEntry/ModuleEntry must be defined
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1241
    // by the NULL classloader.
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1242
    if (mod_entry != NULL) {
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1243
      // PackageEntry/ModuleEntry is found in the classloader. Check if the
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1244
      // ModuleEntry's location agrees with the archived class' origination.
47673
6126617b8508 8185160: -XX:DumpLoadedClassList omits graal classes
iklam
parents: 47614
diff changeset
  1245
      if (ent->is_modules_image() && mod_entry->location()->starts_with("jrt:")) {
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1246
        return true; // Module class from the "module" jimage
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1247
      }
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1248
    }
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1249
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1250
    // If the archived class is not from the "module" jimage, the class can be
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1251
    // loaded by the NULL classloader if
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1252
    //
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1253
    // 1. the class is from the unamed package
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1254
    // 2. or, the class is not from a module defined in the NULL classloader
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1255
    // 3. or, the class is from an unamed module
47673
6126617b8508 8185160: -XX:DumpLoadedClassList omits graal classes
iklam
parents: 47614
diff changeset
  1256
    if (!ent->is_modules_image() && ik->is_shared_boot_class()) {
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1257
      // the class is from the -Xbootclasspath/a
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1258
      if (pkg_string == NULL ||
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1259
          pkg_entry == NULL ||
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1260
          pkg_entry->in_unnamed_module()) {
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1261
        assert(mod_entry == NULL ||
46387
c46632622b17 8176472: Lazily create ModuleEntryTable
rprotacio
parents: 46380
diff changeset
  1262
               mod_entry == loader_data->unnamed_module(),
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1263
               "the unnamed module is not defined in the classloader");
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1264
        return true;
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1265
      }
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1266
    }
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1267
    return false;
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1268
  } else {
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1269
    bool res = SystemDictionaryShared::is_shared_class_visible_for_classloader(
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1270
              ik, class_loader, pkg_string, pkg_name,
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1271
              pkg_entry, mod_entry, CHECK_(false));
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1272
    return res;
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1273
  }
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1274
}
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1275
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1276
InstanceKlass* SystemDictionary::load_shared_class(InstanceKlass* ik,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1277
                                                   Handle class_loader,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1278
                                                   Handle protection_domain, TRAPS) {
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1279
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1280
  if (ik != NULL) {
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1281
    Symbol* class_name = ik->name();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1282
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1283
    bool visible = is_shared_class_visible(
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1284
                            class_name, ik, class_loader, CHECK_NULL);
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1285
    if (!visible) {
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1286
      return NULL;
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1287
    }
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1288
38709
835ea8e8b295 8145247: incorrect comment in SystemDictionary::load_shared_class
iklam
parents: 38658
diff changeset
  1289
    // Resolve the superclass and interfaces. They must be the same
835ea8e8b295 8145247: incorrect comment in SystemDictionary::load_shared_class
iklam
parents: 38658
diff changeset
  1290
    // as in dump time, because the layout of <ik> depends on
835ea8e8b295 8145247: incorrect comment in SystemDictionary::load_shared_class
iklam
parents: 38658
diff changeset
  1291
    // the specific layout of ik->super() and ik->local_interfaces().
835ea8e8b295 8145247: incorrect comment in SystemDictionary::load_shared_class
iklam
parents: 38658
diff changeset
  1292
    //
835ea8e8b295 8145247: incorrect comment in SystemDictionary::load_shared_class
iklam
parents: 38658
diff changeset
  1293
    // If unexpected superclass or interfaces are found, we cannot
835ea8e8b295 8145247: incorrect comment in SystemDictionary::load_shared_class
iklam
parents: 38658
diff changeset
  1294
    // load <ik> from the shared archive.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1295
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1296
    if (ik->super() != NULL) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1297
      Symbol*  cn = ik->super()->name();
34257
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
iklam
parents: 33612
diff changeset
  1298
      Klass *s = resolve_super_or_fail(class_name, cn,
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1299
                                       class_loader, protection_domain, true, CHECK_NULL);
34257
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
iklam
parents: 33612
diff changeset
  1300
      if (s != ik->super()) {
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
iklam
parents: 33612
diff changeset
  1301
        // The dynamically resolved super class is not the same as the one we used during dump time,
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
iklam
parents: 33612
diff changeset
  1302
        // so we cannot use ik.
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1303
        return NULL;
38709
835ea8e8b295 8145247: incorrect comment in SystemDictionary::load_shared_class
iklam
parents: 38658
diff changeset
  1304
      } else {
835ea8e8b295 8145247: incorrect comment in SystemDictionary::load_shared_class
iklam
parents: 38658
diff changeset
  1305
        assert(s->is_shared(), "must be");
34257
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
iklam
parents: 33612
diff changeset
  1306
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1307
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1308
51329
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
  1309
    Array<InstanceKlass*>* interfaces = ik->local_interfaces();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1310
    int num_interfaces = interfaces->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1311
    for (int index = 0; index < num_interfaces; index++) {
51329
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
  1312
      InstanceKlass* k = interfaces->at(index);
9c68699bebe5 8208999: Some use of Klass* should be replaced by InstanceKlass*
iklam
parents: 51268
diff changeset
  1313
      Symbol* name  = k->name();
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1314
      Klass* i = resolve_super_or_fail(class_name, name, class_loader, protection_domain, false, CHECK_NULL);
34257
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
iklam
parents: 33612
diff changeset
  1315
      if (k != i) {
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
iklam
parents: 33612
diff changeset
  1316
        // The dynamically resolved interface class is not the same as the one we used during dump time,
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
iklam
parents: 33612
diff changeset
  1317
        // so we cannot use ik.
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1318
        return NULL;
38709
835ea8e8b295 8145247: incorrect comment in SystemDictionary::load_shared_class
iklam
parents: 38658
diff changeset
  1319
      } else {
835ea8e8b295 8145247: incorrect comment in SystemDictionary::load_shared_class
iklam
parents: 38658
diff changeset
  1320
        assert(i->is_shared(), "must be");
34257
4be3504cc03b 8140802: Clean up and refactor of class loading code for CDS
iklam
parents: 33612
diff changeset
  1321
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1322
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1323
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1324
    InstanceKlass* new_ik = KlassFactory::check_shared_class_file_load_hook(
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1325
        ik, class_name, class_loader, protection_domain, CHECK_NULL);
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1326
    if (new_ik != NULL) {
41182
dbd59c1da636 8078644: CDS needs to support JVMTI CFLH
jiangli
parents: 40923
diff changeset
  1327
      // The class is changed by CFLH. Return the new class. The shared class is
dbd59c1da636 8078644: CDS needs to support JVMTI CFLH
jiangli
parents: 40923
diff changeset
  1328
      // not used.
dbd59c1da636 8078644: CDS needs to support JVMTI CFLH
jiangli
parents: 40923
diff changeset
  1329
      return new_ik;
dbd59c1da636 8078644: CDS needs to support JVMTI CFLH
jiangli
parents: 40923
diff changeset
  1330
    }
dbd59c1da636 8078644: CDS needs to support JVMTI CFLH
jiangli
parents: 40923
diff changeset
  1331
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1332
    // Adjust methods to recover missing data.  They need addresses for
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1333
    // interpreter entry points and their default native method address
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1334
    // must be reset.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1335
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1336
    // Updating methods must be done under a lock so multiple
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1337
    // threads don't update these in parallel
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1338
    //
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1339
    // Shared classes are all currently loaded by either the bootstrap or
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1340
    // internal parallel class loaders, so this will never cause a deadlock
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1341
    // on a custom class loader lock.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1342
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1343
    ClassLoaderData* loader_data = ClassLoaderData::class_loader_data(class_loader());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1344
    {
46271
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  1345
      HandleMark hm(THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1346
      Handle lockObject = compute_loader_lock_object(class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1347
      check_loader_lock_contention(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1348
      ObjectLocker ol(lockObject, THREAD, true);
40016
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
  1349
      // prohibited package check assumes all classes loaded from archive call
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
  1350
      // restore_unshareable_info which calls ik->set_package()
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1351
      ik->restore_unshareable_info(loader_data, protection_domain, CHECK_NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1352
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1353
46444
677be3444372 8154791: Xlog classload too redundant msgs info/debug
rprotacio
parents: 46435
diff changeset
  1354
    ik->print_class_load_logging(loader_data, NULL, NULL);
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1355
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1356
    // For boot loader, ensure that GetSystemPackage knows that a class in this
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1357
    // package was loaded.
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1358
    if (class_loader.is_null()) {
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1359
      int path_index = ik->shared_classpath_index();
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1360
      ResourceMark rm;
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1361
      ClassLoader::add_package(ik->name()->as_C_string(), path_index, THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1362
    }
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1363
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1364
    if (DumpLoadedClassList != NULL && classlist_file->is_open()) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1365
      // Only dump the classes that can be stored into CDS archive
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1366
      if (SystemDictionaryShared::is_sharing_possible(loader_data)) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1367
        ResourceMark rm(THREAD);
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1368
        classlist_file->print_cr("%s", ik->name()->as_C_string());
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1369
        classlist_file->flush();
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1370
      }
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1371
    }
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1372
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1373
    // notify a class loaded from shared object
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1374
    ClassLoadingService::notify_class_loaded(ik, true /* shared class */);
51070
2f4c3cac8556 8206977: Minor improvements of runtime code.
goetz
parents: 50771
diff changeset
  1375
2f4c3cac8556 8206977: Minor improvements of runtime code.
goetz
parents: 50771
diff changeset
  1376
    ik->set_has_passed_fingerprint_check(false);
2f4c3cac8556 8206977: Minor improvements of runtime code.
goetz
parents: 50771
diff changeset
  1377
    if (UseAOT && ik->supers_have_passed_fingerprint_checks()) {
2f4c3cac8556 8206977: Minor improvements of runtime code.
goetz
parents: 50771
diff changeset
  1378
      uint64_t aot_fp = AOTLoader::get_saved_fingerprint(ik);
2f4c3cac8556 8206977: Minor improvements of runtime code.
goetz
parents: 50771
diff changeset
  1379
      uint64_t cds_fp = ik->get_stored_fingerprint();
2f4c3cac8556 8206977: Minor improvements of runtime code.
goetz
parents: 50771
diff changeset
  1380
      if (aot_fp != 0 && aot_fp == cds_fp) {
2f4c3cac8556 8206977: Minor improvements of runtime code.
goetz
parents: 50771
diff changeset
  1381
        // This class matches with a class saved in an AOT library
2f4c3cac8556 8206977: Minor improvements of runtime code.
goetz
parents: 50771
diff changeset
  1382
        ik->set_has_passed_fingerprint_check(true);
2f4c3cac8556 8206977: Minor improvements of runtime code.
goetz
parents: 50771
diff changeset
  1383
      } else {
2f4c3cac8556 8206977: Minor improvements of runtime code.
goetz
parents: 50771
diff changeset
  1384
        ResourceMark rm;
2f4c3cac8556 8206977: Minor improvements of runtime code.
goetz
parents: 50771
diff changeset
  1385
        log_info(class, fingerprint)("%s :  expected = " PTR64_FORMAT " actual = " PTR64_FORMAT, ik->external_name(), aot_fp, cds_fp);
2f4c3cac8556 8206977: Minor improvements of runtime code.
goetz
parents: 50771
diff changeset
  1386
      }
42650
1f304d0c888b 8171008: Integrate AOT compiler into JDK
kvn
parents: 42639
diff changeset
  1387
    }
1f304d0c888b 8171008: Integrate AOT compiler into JDK
kvn
parents: 42639
diff changeset
  1388
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1389
  return ik;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1390
}
26419
25abc4a3285c 8056971: Minor class loading clean-up
iklam
parents: 26181
diff changeset
  1391
#endif // INCLUDE_CDS
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1392
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1393
InstanceKlass* SystemDictionary::load_instance_class(Symbol* class_name, Handle class_loader, TRAPS) {
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1394
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1395
  if (class_loader.is_null()) {
39216
40c3d66352ae 8153858: Clean up needed when obtaining the package name from a fully qualified class name
rprotacio
parents: 38709
diff changeset
  1396
    ResourceMark rm;
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1397
    PackageEntry* pkg_entry = NULL;
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1398
    bool search_only_bootloader_append = false;
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1399
    ClassLoaderData *loader_data = class_loader_data(class_loader);
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1400
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1401
    // Find the package in the boot loader's package entry table.
39216
40c3d66352ae 8153858: Clean up needed when obtaining the package name from a fully qualified class name
rprotacio
parents: 38709
diff changeset
  1402
    TempNewSymbol pkg_name = InstanceKlass::package_from_name(class_name, CHECK_NULL);
40c3d66352ae 8153858: Clean up needed when obtaining the package name from a fully qualified class name
rprotacio
parents: 38709
diff changeset
  1403
    if (pkg_name != NULL) {
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1404
      pkg_entry = loader_data->packages()->lookup_only(pkg_name);
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1405
    }
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1406
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1407
    // Prior to attempting to load the class, enforce the boot loader's
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1408
    // visibility boundaries.
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1409
    if (!Universe::is_module_initialized()) {
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1410
      // During bootstrapping, prior to module initialization, any
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1411
      // class attempting to be loaded must be checked against the
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1412
      // java.base packages in the boot loader's PackageEntryTable.
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1413
      // No class outside of java.base is allowed to be loaded during
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1414
      // this bootstrapping window.
47991
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1415
      if (pkg_entry == NULL || pkg_entry->in_unnamed_module()) {
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1416
        // Class is either in the unnamed package or in
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1417
        // a named package within the unnamed module.  Either
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1418
        // case is outside of java.base, do not attempt to
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1419
        // load the class post java.base definition.  If
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1420
        // java.base has not been defined, let the class load
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1421
        // and its package will be checked later by
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1422
        // ModuleEntryTable::verify_javabase_packages.
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1423
        if (ModuleEntryTable::javabase_defined()) {
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1424
          return NULL;
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1425
        }
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1426
      } else {
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1427
        // Check that the class' package is defined within java.base.
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1428
        ModuleEntry* mod_entry = pkg_entry->module();
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1429
        Symbol* mod_entry_name = mod_entry->name();
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1430
        if (mod_entry_name->fast_compare(vmSymbols::java_base()) != 0) {
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1431
          return NULL;
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1432
        }
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1433
      }
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1434
    } else {
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1435
      // After the module system has been initialized, check if the class'
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1436
      // package is in a module defined to the boot loader.
39216
40c3d66352ae 8153858: Clean up needed when obtaining the package name from a fully qualified class name
rprotacio
parents: 38709
diff changeset
  1437
      if (pkg_name == NULL || pkg_entry == NULL || pkg_entry->in_unnamed_module()) {
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1438
        // Class is either in the unnamed package, in a named package
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1439
        // within a module not defined to the boot loader or in a
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1440
        // a named package within the unnamed module.  In all cases,
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1441
        // limit visibility to search for the class only in the boot
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1442
        // loader's append path.
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1443
        search_only_bootloader_append = true;
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1444
      }
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1445
    }
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1446
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1447
    // Prior to bootstrapping's module initialization, never load a class outside
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1448
    // of the boot loader's module path
47991
a474466c4fdb 8187118: Remove appending -cp path to the boot class path at AppCDS dump time
jiangli
parents: 47774
diff changeset
  1449
    assert(Universe::is_module_initialized() ||
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1450
           !search_only_bootloader_append,
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1451
           "Attempt to load a class outside of boot loader's module path");
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1452
52319
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  1453
    // Search for classes in the CDS archive.
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1454
    InstanceKlass* k = NULL;
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1455
    {
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1456
#if INCLUDE_CDS
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1457
      PerfTraceTime vmtimer(ClassLoader::perf_shared_classload_time());
52335
6507eeb6f047 8203953: Rename SystemDictionary::load_shared_class(Symbol*, Handle, TRAPS) to load_shared_boot_class().
jiangli
parents: 52319
diff changeset
  1458
      k = load_shared_boot_class(class_name, THREAD);
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1459
#endif
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1460
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1461
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1462
    if (k == NULL) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1463
      // Use VM class loader
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1464
      PerfTraceTime vmtimer(ClassLoader::perf_sys_classload_time());
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1465
      k = ClassLoader::load_class(class_name, search_only_bootloader_append, CHECK_NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1466
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1467
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1468
    // find_or_define_instance_class may return a different InstanceKlass
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1469
    if (k != NULL) {
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1470
      InstanceKlass* defined_k =
43948
26f3c55e246e 8173743: Failures during class definition can lead to memory leaks in metaspace
simonis
parents: 42876
diff changeset
  1471
        find_or_define_instance_class(class_name, class_loader, k, THREAD);
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1472
      if (!HAS_PENDING_EXCEPTION && defined_k != k) {
43948
26f3c55e246e 8173743: Failures during class definition can lead to memory leaks in metaspace
simonis
parents: 42876
diff changeset
  1473
        // If a parallel capable class loader already defined this class, register 'k' for cleanup.
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1474
        assert(defined_k != NULL, "Should have a klass if there's no exception");
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1475
        loader_data->add_to_deallocate_list(k);
43948
26f3c55e246e 8173743: Failures during class definition can lead to memory leaks in metaspace
simonis
parents: 42876
diff changeset
  1476
        k = defined_k;
26f3c55e246e 8173743: Failures during class definition can lead to memory leaks in metaspace
simonis
parents: 42876
diff changeset
  1477
      } else if (HAS_PENDING_EXCEPTION) {
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1478
        loader_data->add_to_deallocate_list(k);
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1479
        return NULL;
43948
26f3c55e246e 8173743: Failures during class definition can lead to memory leaks in metaspace
simonis
parents: 42876
diff changeset
  1480
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1481
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1482
    return k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1483
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1484
    // Use user specified class loader to load class. Call loadClass operation on class_loader.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1485
    ResourceMark rm(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1486
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1487
    assert(THREAD->is_Java_thread(), "must be a JavaThread");
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1488
    JavaThread* jt = (JavaThread*) THREAD;
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1489
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1490
    PerfClassTraceTime vmtimer(ClassLoader::perf_app_classload_time(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1491
                               ClassLoader::perf_app_classload_selftime(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1492
                               ClassLoader::perf_app_classload_count(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1493
                               jt->get_thread_stat()->perf_recursion_counts_addr(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1494
                               jt->get_thread_stat()->perf_timers_addr(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1495
                               PerfClassTraceTime::CLASS_LOAD);
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1496
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1497
    Handle s = java_lang_String::create_from_symbol(class_name, CHECK_NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1498
    // Translate to external class name format, i.e., convert '/' chars to '.'
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1499
    Handle string = java_lang_String::externalize_classname(s, CHECK_NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1500
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1501
    JavaValue result(T_OBJECT);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1502
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1503
    InstanceKlass* spec_klass = SystemDictionary::ClassLoader_klass();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1504
49037
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
  1505
    // Call public unsynchronized loadClass(String) directly for all class loaders.
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
  1506
    // For parallelCapable class loaders, JDK >=7, loadClass(String, boolean) will
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1507
    // acquire a class-name based lock rather than the class loader object lock.
49037
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
  1508
    // JDK < 7 already acquire the class loader lock in loadClass(String, boolean).
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
  1509
    JavaCalls::call_virtual(&result,
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
  1510
                            class_loader,
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
  1511
                            spec_klass,
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
  1512
                            vmSymbols::loadClass_name(),
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
  1513
                            vmSymbols::string_class_signature(),
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
  1514
                            string,
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
  1515
                            CHECK_NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1516
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1517
    assert(result.get_type() == T_OBJECT, "just checking");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1518
    oop obj = (oop) result.get_jobject();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1519
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1520
    // Primitive classes return null since forName() can not be
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1521
    // used to obtain any of the Class objects representing primitives or void
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1522
    if ((obj != NULL) && !(java_lang_Class::is_primitive(obj))) {
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1523
      InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(obj));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1524
      // For user defined Java class loaders, check that the name returned is
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1525
      // the same as that requested.  This check is done for the bootstrap
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1526
      // loader when parsing the class file.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1527
      if (class_name == k->name()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1528
        return k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1529
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1530
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1531
    // Class is not found or has the wrong name, return NULL
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1532
    return NULL;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1533
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1534
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1535
50113
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
  1536
static void post_class_define_event(InstanceKlass* k, const ClassLoaderData* def_cld) {
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
  1537
  EventClassDefine event;
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
  1538
  if (event.should_commit()) {
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
  1539
    event.set_definedClass(k);
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
  1540
    event.set_definingClassLoader(def_cld);
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
  1541
    event.commit();
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
  1542
  }
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
  1543
}
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
  1544
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1545
void SystemDictionary::define_instance_class(InstanceKlass* k, TRAPS) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1546
46271
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  1547
  HandleMark hm(THREAD);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1548
  ClassLoaderData* loader_data = k->class_loader_data();
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1549
  Handle class_loader_h(THREAD, loader_data->class_loader());
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1550
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1551
 // for bootstrap and other parallel classloaders don't acquire lock,
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1552
 // use placeholder token
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1553
 // If a parallelCapable class loader calls define_instance_class instead of
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1554
 // find_or_define_instance_class to get here, we have a timing
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1555
 // hole with systemDictionary updates and check_constraints
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1556
 if (!class_loader_h.is_null() && !is_parallelCapable(class_loader_h)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1557
    assert(ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1558
         compute_loader_lock_object(class_loader_h, THREAD)),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1559
         "define called without lock");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1560
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1561
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1562
  // Check class-loading constraints. Throw exception if violation is detected.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1563
  // Grabs and releases SystemDictionary_lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1564
  // The check_constraints/find_class call and update_dictionary sequence
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1565
  // must be "atomic" for a specific class/classloader pair so we never
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1566
  // define two different instanceKlasses for that class/classloader pair.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1567
  // Existing classloaders will call define_instance_class with the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1568
  // classloader lock held
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1569
  // Parallel classloaders will call find_or_define_instance_class
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1570
  // which will require a token to perform the define class
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1571
  Symbol*  name_h = k->name();
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1572
  Dictionary* dictionary = loader_data->dictionary();
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1573
  unsigned int d_hash = dictionary->compute_hash(name_h);
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
  1574
  check_constraints(d_hash, k, class_loader_h, true, CHECK);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1575
13753
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1576
  // Register class just loaded with class loader (placed in Vector)
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1577
  // Note we do this before updating the dictionary, as this can
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1578
  // fail with an OutOfMemoryError (if it does, we will *not* put this
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1579
  // class in the dictionary and will not update the class hierarchy).
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1580
  // JVMTI FollowReferences needs to find the classes this way.
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1581
  if (k->class_loader() != NULL) {
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1582
    methodHandle m(THREAD, Universe::loader_addClass_method());
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1583
    JavaValue result(T_VOID);
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1584
    JavaCallArguments args(class_loader_h);
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1585
    args.push_oop(Handle(THREAD, k->java_mirror()));
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1586
    JavaCalls::call(&result, m, &args, CHECK);
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1587
  }
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1588
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1589
  // Add the new class. We need recompile lock during update of CHA.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1590
  {
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1591
    unsigned int p_hash = placeholders()->compute_hash(name_h);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1592
    int p_index = placeholders()->hash_to_index(p_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1593
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1594
    MutexLocker mu_r(Compile_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1595
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1596
    // Add to class hierarchy, initialize vtables, and do possible
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1597
    // deoptimizations.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1598
    add_to_hierarchy(k, CHECK); // No exception, but can block
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1599
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1600
    // Add to systemDictionary - so other classes can see it.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1601
    // Grabs and releases SystemDictionary_lock
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
  1602
    update_dictionary(d_hash, p_index, p_hash,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1603
                      k, class_loader_h, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1604
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1605
  k->eager_initialize(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1606
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1607
  // notify jvmti
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1608
  if (JvmtiExport::should_post_class_load()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1609
      assert(THREAD->is_Java_thread(), "thread->is_Java_thread()");
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1610
      JvmtiExport::post_class_load((JavaThread *) THREAD, k);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1611
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1612
  }
50113
caf115bb98ad 8199712: Flight Recorder
egahlin
parents: 50063
diff changeset
  1613
  post_class_define_event(k, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1614
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1615
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1616
// Support parallel classloading
4445
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
  1617
// All parallel class loaders, including bootstrap classloader
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
  1618
// lock a placeholder entry for this class/class_loader pair
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
  1619
// to allow parallel defines of different classes for this class loader
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1620
// With AllowParallelDefine flag==true, in case they do not synchronize around
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1621
// FindLoadedClass/DefineClass, calls, we check for parallel
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1622
// loading for them, wait if a defineClass is in progress
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1623
// and return the initial requestor's results
4445
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
  1624
// This flag does not apply to the bootstrap classloader.
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1625
// With AllowParallelDefine flag==false, call through to define_instance_class
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1626
// which will throw LinkageError: duplicate class definition.
4445
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
  1627
// False is the requested default.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1628
// For better performance, the class loaders should synchronize
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1629
// findClass(), i.e. FindLoadedClass/DefineClassIfAbsent or they
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1630
// potentially waste time reading and parsing the bytestream.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1631
// Note: VM callers should ensure consistency of k/class_name,class_loader
40016
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
  1632
// Be careful when modifying this code: once you have run
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
  1633
// placeholders()->find_and_add(PlaceholderTable::DEFINE_CLASS),
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
  1634
// you need to find_and_remove it before returning.
bf6fcd467a7b 8162340: Better class stream parsing
acorn
parents: 40013
diff changeset
  1635
// So be careful to not exit with a CHECK_ macro betweeen these calls.
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1636
InstanceKlass* SystemDictionary::find_or_define_instance_class(Symbol* class_name, Handle class_loader,
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1637
                                                               InstanceKlass* k, TRAPS) {
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1638
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1639
  Symbol*  name_h = k->name(); // passed in class_name may be null
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1640
  ClassLoaderData* loader_data = class_loader_data(class_loader);
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1641
  Dictionary* dictionary = loader_data->dictionary();
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1642
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1643
  unsigned int d_hash = dictionary->compute_hash(name_h);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1644
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1645
  // Hold SD lock around find_class and placeholder creation for DEFINE_CLASS
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1646
  unsigned int p_hash = placeholders()->compute_hash(name_h);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1647
  int p_index = placeholders()->hash_to_index(p_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1648
  PlaceholderEntry* probe;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1649
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1650
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1651
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1652
    // First check if class already defined
49037
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
  1653
    if (is_parallelDefine(class_loader)) {
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
  1654
      InstanceKlass* check = find_class(d_hash, name_h, dictionary);
4445
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
  1655
      if (check != NULL) {
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1656
        return check;
4445
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
  1657
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1658
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1659
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1660
    // Acquire define token for this class/classloader
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1661
    probe = placeholders()->find_and_add(p_index, p_hash, name_h, loader_data, PlaceholderTable::DEFINE_CLASS, NULL, THREAD);
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1662
    // Wait if another thread defining in parallel
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1663
    // All threads wait - even those that will throw duplicate class: otherwise
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1664
    // caller is surprised by LinkageError: duplicate, but findLoadedClass fails
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1665
    // if other thread has not finished updating dictionary
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1666
    while (probe->definer() != NULL) {
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1667
      SystemDictionary_lock->wait();
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1668
    }
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1669
    // Only special cases allow parallel defines and can use other thread's results
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1670
    // Other cases fall through, and may run into duplicate defines
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1671
    // caught by finding an entry in the SystemDictionary
49037
dc68aeea4840 8184289: Obsolete -XX:+UnsyncloadClass and -XX:+MustCallLoadClassInternal options
hseigel
parents: 48826
diff changeset
  1672
    if (is_parallelDefine(class_loader) && (probe->instance_klass() != NULL)) {
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
  1673
        placeholders()->find_and_remove(p_index, p_hash, name_h, loader_data, PlaceholderTable::DEFINE_CLASS, THREAD);
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1674
        SystemDictionary_lock->notify_all();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1675
#ifdef ASSERT
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
  1676
        InstanceKlass* check = find_class(d_hash, name_h, dictionary);
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1677
        assert(check != NULL, "definer missed recording success");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1678
#endif
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1679
        return probe->instance_klass();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1680
    } else {
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1681
      // This thread will define the class (even if earlier thread tried and had an error)
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1682
      probe->set_definer(THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1683
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1684
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1685
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1686
  define_instance_class(k, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1687
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1688
  Handle linkage_exception = Handle(); // null handle
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1689
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1690
  // definer must notify any waiting threads
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1691
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1692
    MutexLocker mu(SystemDictionary_lock, THREAD);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1693
    PlaceholderEntry* probe = placeholders()->get_entry(p_index, p_hash, name_h, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1694
    assert(probe != NULL, "DEFINE_CLASS placeholder lost?");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1695
    if (probe != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1696
      if (HAS_PENDING_EXCEPTION) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1697
        linkage_exception = Handle(THREAD,PENDING_EXCEPTION);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1698
        CLEAR_PENDING_EXCEPTION;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1699
      } else {
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1700
        probe->set_instance_klass(k);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1701
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1702
      probe->set_definer(NULL);
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
  1703
      placeholders()->find_and_remove(p_index, p_hash, name_h, loader_data, PlaceholderTable::DEFINE_CLASS, THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1704
      SystemDictionary_lock->notify_all();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1705
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1706
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1707
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1708
  // Can't throw exception while holding lock due to rank ordering
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1709
  if (linkage_exception() != NULL) {
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1710
    THROW_OOP_(linkage_exception(), NULL); // throws exception and returns
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1711
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1712
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1713
  return k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1714
}
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1715
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1716
Handle SystemDictionary::compute_loader_lock_object(Handle class_loader, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1717
  // If class_loader is NULL we synchronize on _system_loader_lock_obj
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1718
  if (class_loader.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1719
    return Handle(THREAD, _system_loader_lock_obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1720
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1721
    return class_loader;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1722
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1723
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1724
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1725
// This method is added to check how often we have to wait to grab loader
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1726
// lock. The results are being recorded in the performance counters defined in
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1727
// ClassLoader::_sync_systemLoaderLockContentionRate and
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1728
// ClassLoader::_sync_nonSystemLoaderLockConteionRate.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1729
void SystemDictionary::check_loader_lock_contention(Handle loader_lock, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1730
  if (!UsePerfData) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1731
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1732
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1733
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1734
  assert(!loader_lock.is_null(), "NULL lock object");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1735
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1736
  if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader_lock)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1737
      == ObjectSynchronizer::owner_other) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1738
    // contention will likely happen, so increment the corresponding
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1739
    // contention counter.
49658
8237a91c1cca 8199781: Don't use naked == for comparing oops
rkennke
parents: 49641
diff changeset
  1740
    if (oopDesc::equals(loader_lock(), _system_loader_lock_obj)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1741
      ClassLoader::sync_systemLoaderLockContentionRate()->inc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1742
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1743
      ClassLoader::sync_nonSystemLoaderLockContentionRate()->inc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1744
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1745
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1746
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1747
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1748
// ----------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1749
// Lookup
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1750
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
  1751
InstanceKlass* SystemDictionary::find_class(unsigned int hash,
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1752
                                            Symbol* class_name,
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1753
                                            Dictionary* dictionary) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1754
  assert_locked_or_safepoint(SystemDictionary_lock);
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
  1755
  int index = dictionary->hash_to_index(hash);
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1756
  return dictionary->find_class(index, hash, class_name);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1757
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1758
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1759
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1760
// Basic find on classes in the midst of being loaded
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1761
Symbol* SystemDictionary::find_placeholder(Symbol* class_name,
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1762
                                           ClassLoaderData* loader_data) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1763
  assert_locked_or_safepoint(SystemDictionary_lock);
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1764
  unsigned int p_hash = placeholders()->compute_hash(class_name);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1765
  int p_index = placeholders()->hash_to_index(p_hash);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1766
  return placeholders()->find_entry(p_index, p_hash, class_name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1767
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1768
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1769
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1770
// Used for assertions and verification only
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1771
// Precalculating the hash and index is an optimization because there are many lookups
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1772
// before adding the class.
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1773
InstanceKlass* SystemDictionary::find_class(Symbol* class_name, ClassLoaderData* loader_data) {
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1774
  assert_locked_or_safepoint(SystemDictionary_lock);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1775
  #ifndef ASSERT
16680
960505df90e7 8011343: Add new flag for verifying the heap during startup
johnc
parents: 16631
diff changeset
  1776
  guarantee(VerifyBeforeGC      ||
960505df90e7 8011343: Add new flag for verifying the heap during startup
johnc
parents: 16631
diff changeset
  1777
            VerifyDuringGC      ||
960505df90e7 8011343: Add new flag for verifying the heap during startup
johnc
parents: 16631
diff changeset
  1778
            VerifyBeforeExit    ||
960505df90e7 8011343: Add new flag for verifying the heap during startup
johnc
parents: 16631
diff changeset
  1779
            VerifyDuringStartup ||
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1780
            VerifyAfterGC, "too expensive");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1781
  #endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1782
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1783
  Dictionary* dictionary = loader_data->dictionary();
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1784
  unsigned int d_hash = dictionary->compute_hash(class_name);
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
  1785
  return find_class(d_hash, class_name, dictionary);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1786
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1787
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1788
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1789
// ----------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1790
// Update hierachy. This is done before the new klass has been added to the SystemDictionary. The Recompile_lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1791
// is held, to ensure that the compiler is not using the class hierachy, and that deoptimization will kick in
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1792
// before a new class is used.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1793
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1794
void SystemDictionary::add_to_hierarchy(InstanceKlass* k, TRAPS) {
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1795
  assert(k != NULL, "just checking");
8314
057b1c20fd7e 6354181: nsk.logging.stress.threads.scmhml001 fails assertion in "src/share/vm/oops/instanceKlass.cpp, 111"
never
parents: 8076
diff changeset
  1796
  assert_locked_or_safepoint(Compile_lock);
057b1c20fd7e 6354181: nsk.logging.stress.threads.scmhml001 fails assertion in "src/share/vm/oops/instanceKlass.cpp, 111"
never
parents: 8076
diff changeset
  1797
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1798
  // Link into hierachy. Make sure the vtables are initialized before linking into
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1799
  k->append_to_sibling_list();                    // add to superklass/sibling list
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1800
  k->process_interfaces(THREAD);                  // handle all "implements" declarations
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1801
  k->set_init_state(InstanceKlass::loaded);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1802
  // Now flush all code that depended on old class hierarchy.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1803
  // Note: must be done *after* linking k into the hierarchy (was bug 12/9/97)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1804
  // Also, first reinitialize vtable because it may have gotten out of synch
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1805
  // while the new class wasn't connected to the class hierarchy.
28374
0558e321c027 8067836: The Universe::flush_foo methods belong in CodeCache.
coleenp
parents: 27694
diff changeset
  1806
  CodeCache::flush_dependents_on(k);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1807
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1808
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1809
// ----------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1810
// GC support
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1811
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
  1812
// Assumes classes in the SystemDictionary are only unloaded at a safepoint
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
  1813
// Note: anonymous classes are not in the SD.
52498
c3066f7465fa 8213307: G1 should clean up RMT with ClassUnloadingWithConcurrentMark
tschatzl
parents: 52335
diff changeset
  1814
bool SystemDictionary::do_unloading(GCTimer* gc_timer) {
46505
fd4bc78630b1 8174749: Use hash table/oops for MemberName table
coleenp
parents: 46444
diff changeset
  1815
fd4bc78630b1 8174749: Use hash table/oops for MemberName table
coleenp
parents: 46444
diff changeset
  1816
  bool unloading_occurred;
52587
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1817
  bool is_concurrent = !SafepointSynchronize::is_at_safepoint();
46505
fd4bc78630b1 8174749: Use hash table/oops for MemberName table
coleenp
parents: 46444
diff changeset
  1818
  {
fd4bc78630b1 8174749: Use hash table/oops for MemberName table
coleenp
parents: 46444
diff changeset
  1819
    GCTraceTime(Debug, gc, phases) t("ClassLoaderData", gc_timer);
52587
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1820
    assert_locked_or_safepoint(ClassLoaderDataGraph_lock);  // caller locks.
46505
fd4bc78630b1 8174749: Use hash table/oops for MemberName table
coleenp
parents: 46444
diff changeset
  1821
    // First, mark for unload all ClassLoaderData referencing a dead class loader.
52498
c3066f7465fa 8213307: G1 should clean up RMT with ClassUnloadingWithConcurrentMark
tschatzl
parents: 52335
diff changeset
  1822
    unloading_occurred = ClassLoaderDataGraph::do_unloading();
51375
b812a85b3aa4 8207778: Add locking to ModuleEntry and PackageEntry tables
hseigel
parents: 51329
diff changeset
  1823
    if (unloading_occurred) {
52587
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1824
      MutexLockerEx ml2(is_concurrent ? Module_lock : NULL);
51543
5303c6c05db6 8202578: Revisit location for class unload events
hseigel
parents: 51523
diff changeset
  1825
      JFR_ONLY(Jfr::on_unloading_classes();)
52587
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1826
      MutexLockerEx ml1(is_concurrent ? SystemDictionary_lock : NULL);
51375
b812a85b3aa4 8207778: Add locking to ModuleEntry and PackageEntry tables
hseigel
parents: 51329
diff changeset
  1827
      ClassLoaderDataGraph::clean_module_and_package_info();
b812a85b3aa4 8207778: Add locking to ModuleEntry and PackageEntry tables
hseigel
parents: 51329
diff changeset
  1828
    }
46505
fd4bc78630b1 8174749: Use hash table/oops for MemberName table
coleenp
parents: 46444
diff changeset
  1829
  }
fd4bc78630b1 8174749: Use hash table/oops for MemberName table
coleenp
parents: 46444
diff changeset
  1830
52587
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1831
  // Cleanup ResolvedMethodTable even if no unloading occurred.
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1832
  {
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1833
    GCTraceTime(Debug, gc, phases) t("ResolvedMethodTable", gc_timer);
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1834
    ResolvedMethodTable::trigger_cleanup();
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1835
  }
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1836
26174
ca46a107cb78 8054402: "klass->is_loader_alive(_is_alive)) failed: must be alive" for anonymous classes
thartmann
parents: 25492
diff changeset
  1837
  if (unloading_occurred) {
51415
0aa5378d4f09 8209541: Fix merge problem in SymbolTable::do_check_concurrent_work
coleenp
parents: 51375
diff changeset
  1838
    {
0aa5378d4f09 8209541: Fix merge problem in SymbolTable::do_check_concurrent_work
coleenp
parents: 51375
diff changeset
  1839
      GCTraceTime(Debug, gc, phases) t("SymbolTable", gc_timer);
0aa5378d4f09 8209541: Fix merge problem in SymbolTable::do_check_concurrent_work
coleenp
parents: 51375
diff changeset
  1840
      // Check if there's work to do in the SymbolTable
0aa5378d4f09 8209541: Fix merge problem in SymbolTable::do_check_concurrent_work
coleenp
parents: 51375
diff changeset
  1841
      SymbolTable::do_check_concurrent_work();
0aa5378d4f09 8209541: Fix merge problem in SymbolTable::do_check_concurrent_work
coleenp
parents: 51375
diff changeset
  1842
    }
0aa5378d4f09 8209541: Fix merge problem in SymbolTable::do_check_concurrent_work
coleenp
parents: 51375
diff changeset
  1843
0aa5378d4f09 8209541: Fix merge problem in SymbolTable::do_check_concurrent_work
coleenp
parents: 51375
diff changeset
  1844
    {
52587
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1845
      MutexLockerEx ml(is_concurrent ? SystemDictionary_lock : NULL);
51415
0aa5378d4f09 8209541: Fix merge problem in SymbolTable::do_check_concurrent_work
coleenp
parents: 51375
diff changeset
  1846
      GCTraceTime(Debug, gc, phases) t("Dictionary", gc_timer);
0aa5378d4f09 8209541: Fix merge problem in SymbolTable::do_check_concurrent_work
coleenp
parents: 51375
diff changeset
  1847
      constraints()->purge_loader_constraints();
0aa5378d4f09 8209541: Fix merge problem in SymbolTable::do_check_concurrent_work
coleenp
parents: 51375
diff changeset
  1848
      resolution_errors()->purge_resolution_errors();
0aa5378d4f09 8209541: Fix merge problem in SymbolTable::do_check_concurrent_work
coleenp
parents: 51375
diff changeset
  1849
    }
52587
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1850
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1851
    {
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1852
      GCTraceTime(Debug, gc, phases) t("ResolvedMethodTable", gc_timer);
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1853
      // Oops referenced by the protection domain cache table may get unreachable independently
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1854
      // of the class loader (eg. cached protection domain oops). So we need to
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1855
      // explicitly unlink them here.
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1856
      // All protection domain oops are linked to the caller class, so if nothing
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1857
      // unloads, this is not needed.
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1858
      _pd_cache_table->trigger_cleanup();
6cd56deebb0d 8213092: Add more runtime locks for concurrent class unloading
coleenp
parents: 52514
diff changeset
  1859
    }
46505
fd4bc78630b1 8174749: Use hash table/oops for MemberName table
coleenp
parents: 46444
diff changeset
  1860
  }
fd4bc78630b1 8174749: Use hash table/oops for MemberName table
coleenp
parents: 46444
diff changeset
  1861
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1862
  return unloading_occurred;
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1863
}
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1864
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1865
void SystemDictionary::oops_do(OopClosure* f) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1866
  f->do_oop(&_java_system_loader);
47614
0ecfd6c951a6 8185694: Replace SystemDictionaryShared::_java_platform_loader with SystemDictionary::is_platform_class_loader()
ccheung
parents: 47216
diff changeset
  1867
  f->do_oop(&_java_platform_loader);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1868
  f->do_oop(&_system_loader_lock_obj);
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1869
  CDS_ONLY(SystemDictionaryShared::oops_do(f);)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1870
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1871
  // Visit extra methods
7104
0c8b519af363 6990192: VM crashes in ciTypeFlow::get_block_for()
twisti
parents: 6463
diff changeset
  1872
  invoke_method_table()->oops_do(f);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1873
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1874
46746
ea379ebb9447 8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents: 46742
diff changeset
  1875
// CDS: scan and relocate all classes referenced by _well_known_klasses[].
ea379ebb9447 8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents: 46742
diff changeset
  1876
void SystemDictionary::well_known_klasses_do(MetaspaceClosure* it) {
ea379ebb9447 8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents: 46742
diff changeset
  1877
  for (int id = FIRST_WKID; id < WKID_LIMIT; id++) {
ea379ebb9447 8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents: 46742
diff changeset
  1878
    it->push(well_known_klass_addr((WKID)id));
ea379ebb9447 8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents: 46742
diff changeset
  1879
  }
ea379ebb9447 8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents: 46742
diff changeset
  1880
}
ea379ebb9447 8072061: Automatically determine optimal sizes for the CDS regions
iklam
parents: 46742
diff changeset
  1881
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1882
void SystemDictionary::methods_do(void f(Method*)) {
46380
4a51438196cf 8026985: Rewrite SystemDictionary::classes_do and Dictionary::classes_do to use KlassClosure
coleenp
parents: 46329
diff changeset
  1883
  // Walk methods in loaded classes
51608
625a5bdde0c5 8210155: Lock ClassLoaderDataGraph
coleenp
parents: 51543
diff changeset
  1884
  MutexLocker ml(ClassLoaderDataGraph_lock);
46380
4a51438196cf 8026985: Rewrite SystemDictionary::classes_do and Dictionary::classes_do to use KlassClosure
coleenp
parents: 46329
diff changeset
  1885
  ClassLoaderDataGraph::methods_do(f);
4a51438196cf 8026985: Rewrite SystemDictionary::classes_do and Dictionary::classes_do to use KlassClosure
coleenp
parents: 46329
diff changeset
  1886
  // Walk method handle intrinsics
7104
0c8b519af363 6990192: VM crashes in ciTypeFlow::get_block_for()
twisti
parents: 6463
diff changeset
  1887
  invoke_method_table()->methods_do(f);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1888
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1889
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1890
// ----------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1891
// Initialization
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1892
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1893
void SystemDictionary::initialize(TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1894
  // Allocate arrays
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1895
  _placeholders        = new PlaceholderTable(_placeholder_table_size);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1896
  _number_of_modifications = 0;
7104
0c8b519af363 6990192: VM crashes in ciTypeFlow::get_block_for()
twisti
parents: 6463
diff changeset
  1897
  _loader_constraints  = new LoaderConstraintTable(_loader_constraint_size);
0c8b519af363 6990192: VM crashes in ciTypeFlow::get_block_for()
twisti
parents: 6463
diff changeset
  1898
  _resolution_errors   = new ResolutionErrorTable(_resolution_error_size);
0c8b519af363 6990192: VM crashes in ciTypeFlow::get_block_for()
twisti
parents: 6463
diff changeset
  1899
  _invoke_method_table = new SymbolPropertyTable(_invoke_method_size);
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  1900
  _pd_cache_table = new ProtectionDomainCacheTable(defaultProtectionDomainCacheSize);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1901
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1902
  // Allocate private object used as system class loader lock
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1903
  _system_loader_lock_obj = oopFactory::new_intArray(0, CHECK);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1904
  // Initialize basic classes
52319
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  1905
  resolve_well_known_classes(CHECK);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1906
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1907
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1908
// Compact table of directions on the initialization of klasses:
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1909
static const short wk_init_info[] = {
52195
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 52062
diff changeset
  1910
  #define WK_KLASS_INIT_INFO(name, symbol) \
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 52062
diff changeset
  1911
    ((short)vmSymbols::VM_SYMBOL_ENUM_NAME(symbol)),
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 52062
diff changeset
  1912
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1913
  WK_KLASSES_DO(WK_KLASS_INIT_INFO)
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1914
  #undef WK_KLASS_INIT_INFO
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1915
  0
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1916
};
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1917
52319
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  1918
#ifdef ASSERT
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  1919
bool SystemDictionary::is_well_known_klass(Symbol* class_name) {
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  1920
  int sid;
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  1921
  for (int i = 0; (sid = wk_init_info[i]) != 0; i++) {
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  1922
    Symbol* symbol = vmSymbols::symbol_at((vmSymbols::SID)sid);
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  1923
    if (class_name == symbol) {
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  1924
      return true;
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  1925
    }
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  1926
  }
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  1927
  return false;
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  1928
}
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  1929
#endif
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  1930
52195
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 52062
diff changeset
  1931
bool SystemDictionary::resolve_wk_klass(WKID id, TRAPS) {
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1932
  assert(id >= (int)FIRST_WKID && id < (int)WKID_LIMIT, "oob");
52195
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 52062
diff changeset
  1933
  int sid = wk_init_info[id - FIRST_WKID];
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1934
  Symbol* symbol = vmSymbols::symbol_at((vmSymbols::SID)sid);
33602
16053580a684 8139163: InstanceKlass::cast passes through NULL
coleenp
parents: 33593
diff changeset
  1935
  InstanceKlass** klassp = &_well_known_klasses[id];
37281
c4e7456d6ae1 8144964: JVMCI compilations need to be disabled until the module system is initialized
twisti
parents: 36822
diff changeset
  1936
52195
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 52062
diff changeset
  1937
37281
c4e7456d6ae1 8144964: JVMCI compilations need to be disabled until the module system is initialized
twisti
parents: 36822
diff changeset
  1938
#if INCLUDE_JVMCI
52195
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 52062
diff changeset
  1939
  if (id >= FIRST_JVMCI_WKID) {
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 52062
diff changeset
  1940
    assert(EnableJVMCI, "resolve JVMCI classes only when EnableJVMCI is true");
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 52062
diff changeset
  1941
  }
37281
c4e7456d6ae1 8144964: JVMCI compilations need to be disabled until the module system is initialized
twisti
parents: 36822
diff changeset
  1942
#endif
c4e7456d6ae1 8144964: JVMCI compilations need to be disabled until the module system is initialized
twisti
parents: 36822
diff changeset
  1943
15432
9d976ca484d8 8000692: Remove old KERNEL code
zgu
parents: 15188
diff changeset
  1944
  if ((*klassp) == NULL) {
52195
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 52062
diff changeset
  1945
    Klass* k = resolve_or_fail(symbol, true, CHECK_0);
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 52062
diff changeset
  1946
    (*klassp) = InstanceKlass::cast(k);
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1947
  }
9116
9bc44be338d6 6981791: remove experimental code for JSR 292
jrose
parents: 8883
diff changeset
  1948
  return ((*klassp) != NULL);
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1949
}
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1950
51180
b7eb9cc56277 8203382: Rename SystemDictionary::initialize_wk_klass to resolve_wk_klass
iklam
parents: 51179
diff changeset
  1951
void SystemDictionary::resolve_wk_klasses_until(WKID limit_id, WKID &start_id, TRAPS) {
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1952
  assert((int)start_id <= (int)limit_id, "IDs are out of order!");
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1953
  for (int id = (int)start_id; id < (int)limit_id; id++) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1954
    assert(id >= (int)FIRST_WKID && id < (int)WKID_LIMIT, "oob");
52195
f08c1d7a5c53 8212642: Remove SystemDictionary::InitOption enum
iklam
parents: 52062
diff changeset
  1955
    resolve_wk_klass((WKID)id, CHECK);
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1956
  }
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1957
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1958
  // move the starting value forward to the limit:
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1959
  start_id = limit_id;
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1960
}
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1961
52319
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  1962
void SystemDictionary::resolve_well_known_classes(TRAPS) {
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  1963
  assert(WK_KLASS(Object_klass) == NULL, "well-known classes should only be initialized once");
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1964
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1965
  // Create the ModuleEntry for java.base.  This call needs to be done here,
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1966
  // after vmSymbols::initialize() is called but before any classes are pre-loaded.
40013
943cf01a6b82 8154239: -Xbootclasspath/a breaks exploded build
lfoltan
parents: 40002
diff changeset
  1967
  ClassLoader::classLoader_init2(CHECK);
36508
5f9eee6b383b 8142968: Module System implementation
alanb
parents: 36381
diff changeset
  1968
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1969
  // Preload commonly used klasses
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1970
  WKID scan = FIRST_WKID;
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1971
  // first do Object, then String, Class
46689
59f0972cf342 8184323: compile-time guard some UseSharedSpaces-only coding with the INCLUDE_CDS macro
mbaesken
parents: 46560
diff changeset
  1972
#if INCLUDE_CDS
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1973
  if (UseSharedSpaces) {
51180
b7eb9cc56277 8203382: Rename SystemDictionary::initialize_wk_klass to resolve_wk_klass
iklam
parents: 51179
diff changeset
  1974
    resolve_wk_klasses_through(WK_KLASS_ENUM_NAME(Object_klass), scan, CHECK);
51674
d7dcaacb95dd 8209971: TestOptionsWithRanges.java crashes in CDS mode with G1UpdateBufferSize=1.
jiangli
parents: 51610
diff changeset
  1975
d7dcaacb95dd 8209971: TestOptionsWithRanges.java crashes in CDS mode with G1UpdateBufferSize=1.
jiangli
parents: 51610
diff changeset
  1976
    // It's unsafe to access the archived heap regions before they
d7dcaacb95dd 8209971: TestOptionsWithRanges.java crashes in CDS mode with G1UpdateBufferSize=1.
jiangli
parents: 51610
diff changeset
  1977
    // are fixed up, so we must do the fixup as early as possible
d7dcaacb95dd 8209971: TestOptionsWithRanges.java crashes in CDS mode with G1UpdateBufferSize=1.
jiangli
parents: 51610
diff changeset
  1978
    // before the archived java objects are accessed by functions
d7dcaacb95dd 8209971: TestOptionsWithRanges.java crashes in CDS mode with G1UpdateBufferSize=1.
jiangli
parents: 51610
diff changeset
  1979
    // such as java_lang_Class::restore_archived_mirror and
d7dcaacb95dd 8209971: TestOptionsWithRanges.java crashes in CDS mode with G1UpdateBufferSize=1.
jiangli
parents: 51610
diff changeset
  1980
    // ConstantPool::restore_unshareable_info (restores the archived
d7dcaacb95dd 8209971: TestOptionsWithRanges.java crashes in CDS mode with G1UpdateBufferSize=1.
jiangli
parents: 51610
diff changeset
  1981
    // resolved_references array object).
d7dcaacb95dd 8209971: TestOptionsWithRanges.java crashes in CDS mode with G1UpdateBufferSize=1.
jiangli
parents: 51610
diff changeset
  1982
    //
52062
8dbf1a13af49 8206009: Move CDS java heap object archiving code to heapShared.hpp and heapShared.cpp
jiangli
parents: 51997
diff changeset
  1983
    // HeapShared::fixup_mapped_heap_regions() fills the empty
51674
d7dcaacb95dd 8209971: TestOptionsWithRanges.java crashes in CDS mode with G1UpdateBufferSize=1.
jiangli
parents: 51610
diff changeset
  1984
    // spaces in the archived heap regions and may use
d7dcaacb95dd 8209971: TestOptionsWithRanges.java crashes in CDS mode with G1UpdateBufferSize=1.
jiangli
parents: 51610
diff changeset
  1985
    // SystemDictionary::Object_klass(), so we can do this only after
d7dcaacb95dd 8209971: TestOptionsWithRanges.java crashes in CDS mode with G1UpdateBufferSize=1.
jiangli
parents: 51610
diff changeset
  1986
    // Object_klass is resolved. See the above resolve_wk_klasses_through()
d7dcaacb95dd 8209971: TestOptionsWithRanges.java crashes in CDS mode with G1UpdateBufferSize=1.
jiangli
parents: 51610
diff changeset
  1987
    // call. No mirror objects are accessed/restored in the above call.
d7dcaacb95dd 8209971: TestOptionsWithRanges.java crashes in CDS mode with G1UpdateBufferSize=1.
jiangli
parents: 51610
diff changeset
  1988
    // Mirrors are restored after java.lang.Class is loaded.
52062
8dbf1a13af49 8206009: Move CDS java heap object archiving code to heapShared.hpp and heapShared.cpp
jiangli
parents: 51997
diff changeset
  1989
    HeapShared::fixup_mapped_heap_regions();
51674
d7dcaacb95dd 8209971: TestOptionsWithRanges.java crashes in CDS mode with G1UpdateBufferSize=1.
jiangli
parents: 51610
diff changeset
  1990
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1991
    // Initialize the constant pool for the Object_class
52514
f4e3900c8d08 8213346: Re-implement shared dictionary using CompactHashtable
iklam
parents: 52498
diff changeset
  1992
    assert(Object_klass()->is_shared(), "must be");
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  1993
    Object_klass()->constants()->restore_unshareable_info(CHECK);
51180
b7eb9cc56277 8203382: Rename SystemDictionary::initialize_wk_klass to resolve_wk_klass
iklam
parents: 51179
diff changeset
  1994
    resolve_wk_klasses_through(WK_KLASS_ENUM_NAME(Class_klass), scan, CHECK);
46689
59f0972cf342 8184323: compile-time guard some UseSharedSpaces-only coding with the INCLUDE_CDS macro
mbaesken
parents: 46560
diff changeset
  1995
  } else
59f0972cf342 8184323: compile-time guard some UseSharedSpaces-only coding with the INCLUDE_CDS macro
mbaesken
parents: 46560
diff changeset
  1996
#endif
59f0972cf342 8184323: compile-time guard some UseSharedSpaces-only coding with the INCLUDE_CDS macro
mbaesken
parents: 46560
diff changeset
  1997
  {
51180
b7eb9cc56277 8203382: Rename SystemDictionary::initialize_wk_klass to resolve_wk_klass
iklam
parents: 51179
diff changeset
  1998
    resolve_wk_klasses_through(WK_KLASS_ENUM_NAME(Class_klass), scan, CHECK);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1999
  }
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  2000
12623
09fcb0dc71ad 6924259: Remove String.count/String.offset
kvn
parents: 11628
diff changeset
  2001
  // Calculate offsets for String and Class classes since they are loaded and
09fcb0dc71ad 6924259: Remove String.count/String.offset
kvn
parents: 11628
diff changeset
  2002
  // can be used after this point.
09fcb0dc71ad 6924259: Remove String.count/String.offset
kvn
parents: 11628
diff changeset
  2003
  java_lang_String::compute_offsets();
10546
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 10265
diff changeset
  2004
  java_lang_Class::compute_offsets();
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  2005
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2006
  // Fixup mirrors for classes loaded before java.lang.Class.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2007
  // These calls iterate over the objects currently in the perm gen
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2008
  // so calling them at this point is matters (not before when there
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2009
  // are fewer objects and not later after there are more objects
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2010
  // in the perm gen.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2011
  Universe::initialize_basic_type_mirrors(CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2012
  Universe::fixup_mirrors(CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2013
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  2014
  // do a bunch more:
51180
b7eb9cc56277 8203382: Rename SystemDictionary::initialize_wk_klass to resolve_wk_klass
iklam
parents: 51179
diff changeset
  2015
  resolve_wk_klasses_through(WK_KLASS_ENUM_NAME(Reference_klass), scan, CHECK);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2016
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2017
  // Preload ref klasses and set reference types
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2018
  InstanceKlass::cast(WK_KLASS(Reference_klass))->set_reference_type(REF_OTHER);
13738
d67be49a5beb 7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
coleenp
parents: 13736
diff changeset
  2019
  InstanceRefKlass::update_nonstatic_oop_maps(WK_KLASS(Reference_klass));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2020
51180
b7eb9cc56277 8203382: Rename SystemDictionary::initialize_wk_klass to resolve_wk_klass
iklam
parents: 51179
diff changeset
  2021
  resolve_wk_klasses_through(WK_KLASS_ENUM_NAME(PhantomReference_klass), scan, CHECK);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2022
  InstanceKlass::cast(WK_KLASS(SoftReference_klass))->set_reference_type(REF_SOFT);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2023
  InstanceKlass::cast(WK_KLASS(WeakReference_klass))->set_reference_type(REF_WEAK);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2024
  InstanceKlass::cast(WK_KLASS(FinalReference_klass))->set_reference_type(REF_FINAL);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2025
  InstanceKlass::cast(WK_KLASS(PhantomReference_klass))->set_reference_type(REF_PHANTOM);
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  2026
8883
5569135acca3 6817525: turn on method handle functionality by default for JSR 292
twisti
parents: 8676
diff changeset
  2027
  // JSR 292 classes
5569135acca3 6817525: turn on method handle functionality by default for JSR 292
twisti
parents: 8676
diff changeset
  2028
  WKID jsr292_group_start = WK_KLASS_ENUM_NAME(MethodHandle_klass);
10265
4c869854aebd 7071653: JSR 292: call site change notification should be pushed not pulled
twisti
parents: 10008
diff changeset
  2029
  WKID jsr292_group_end   = WK_KLASS_ENUM_NAME(VolatileCallSite_klass);
51180
b7eb9cc56277 8203382: Rename SystemDictionary::initialize_wk_klass to resolve_wk_klass
iklam
parents: 51179
diff changeset
  2030
  resolve_wk_klasses_until(jsr292_group_start, scan, CHECK);
b7eb9cc56277 8203382: Rename SystemDictionary::initialize_wk_klass to resolve_wk_klass
iklam
parents: 51179
diff changeset
  2031
  resolve_wk_klasses_through(jsr292_group_end, scan, CHECK);
52319
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  2032
  WKID last = NOT_JVMCI(WKID_LIMIT) JVMCI_ONLY(FIRST_JVMCI_WKID);
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  2033
  resolve_wk_klasses_until(last, scan, CHECK);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2034
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  2035
  _box_klasses[T_BOOLEAN] = WK_KLASS(Boolean_klass);
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  2036
  _box_klasses[T_CHAR]    = WK_KLASS(Character_klass);
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  2037
  _box_klasses[T_FLOAT]   = WK_KLASS(Float_klass);
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  2038
  _box_klasses[T_DOUBLE]  = WK_KLASS(Double_klass);
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  2039
  _box_klasses[T_BYTE]    = WK_KLASS(Byte_klass);
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  2040
  _box_klasses[T_SHORT]   = WK_KLASS(Short_klass);
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  2041
  _box_klasses[T_INT]     = WK_KLASS(Integer_klass);
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  2042
  _box_klasses[T_LONG]    = WK_KLASS(Long_klass);
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  2043
  //_box_klasses[T_OBJECT]  = WK_KLASS(object_klass);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  2044
  //_box_klasses[T_ARRAY]   = WK_KLASS(object_klass);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2045
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2046
  { // Compute whether we should use checkPackageAccess or NOT
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2047
    Method* method = InstanceKlass::cast(ClassLoader_klass())->find_method(vmSymbols::checkPackageAccess_name(), vmSymbols::class_protectiondomain_signature());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2048
    _has_checkPackageAccess = (method != NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2049
  }
52319
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  2050
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  2051
#ifdef ASSERT
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  2052
  if (UseSharedSpaces) {
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  2053
    assert(JvmtiExport::is_early_phase(),
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  2054
           "All well known classes must be resolved in JVMTI early phase");
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  2055
    for (int i = FIRST_WKID; i < last; i++) {
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  2056
      InstanceKlass* k = _well_known_klasses[i];
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  2057
      assert(k->is_shared(), "must not be replaced by JVMTI class file load hook");
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  2058
    }
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  2059
  }
625f6c742392 8212200: assert when shared java.lang.Object is redefined by JVMTI agent
iklam
parents: 52195
diff changeset
  2060
#endif
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2061
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2062
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2063
// Tells if a given klass is a box (wrapper class, such as java.lang.Integer).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2064
// If so, returns the basic type it holds.  If not, returns T_OBJECT.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2065
BasicType SystemDictionary::box_klass_type(Klass* k) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2066
  assert(k != NULL, "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2067
  for (int i = T_BOOLEAN; i < T_VOID+1; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2068
    if (_box_klasses[i] == k)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2069
      return (BasicType)i;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2070
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2071
  return T_OBJECT;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2072
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2073
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2074
// Constraints on class loaders. The details of the algorithm can be
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2075
// found in the OOPSLA'98 paper "Dynamic Class Loading in the Java
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2076
// Virtual Machine" by Sheng Liang and Gilad Bracha.  The basic idea is
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2077
// that the dictionary needs to maintain a set of contraints that
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2078
// must be satisfied by all classes in the dictionary.
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2079
// if defining is true, then LinkageError if already in dictionary
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2080
// if initiating loader, then ok if InstanceKlass matches existing entry
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2081
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
  2082
void SystemDictionary::check_constraints(unsigned int d_hash,
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2083
                                         InstanceKlass* k,
50036
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2084
                                         Handle class_loader,
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2085
                                         bool defining,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2086
                                         TRAPS) {
50036
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2087
  ResourceMark rm(THREAD);
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2088
  stringStream ss;
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2089
  bool throwException = false;
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2090
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2091
  {
50176
0cc29ebee3f9 8203400: Fix issue with "8199852: Print more information about class loaders in LinkageErrors."
goetz
parents: 50152
diff changeset
  2092
    Symbol *name = k->name();
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2093
    ClassLoaderData *loader_data = class_loader_data(class_loader);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2094
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2095
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2096
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
  2097
    InstanceKlass* check = find_class(d_hash, name, loader_data->dictionary());
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2098
    if (check != NULL) {
50036
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2099
      // If different InstanceKlass - duplicate class definition,
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2100
      // else - ok, class loaded by a different thread in parallel.
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2101
      // We should only have found it if it was done loading and ok to use.
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2102
      // The dictionary only holds instance classes, placeholders
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2103
      // also hold array classes.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2104
33611
9abd65805e19 8139203: Consistent naming for klass type predicates
coleenp
parents: 33602
diff changeset
  2105
      assert(check->is_instance_klass(), "noninstance in systemdictionary");
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2106
      if ((defining == true) || (k != check)) {
50036
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2107
        throwException = true;
51097
bef02342d179 8205611: Improve the wording of LinkageErrors to include module and class loader information
lfoltan
parents: 51070
diff changeset
  2108
        ss.print("loader %s", loader_data->loader_name_and_id());
bef02342d179 8205611: Improve the wording of LinkageErrors to include module and class loader information
lfoltan
parents: 51070
diff changeset
  2109
        ss.print(" attempted duplicate %s definition for %s. (%s)",
bef02342d179 8205611: Improve the wording of LinkageErrors to include module and class loader information
lfoltan
parents: 51070
diff changeset
  2110
                 k->external_kind(), k->external_name(), k->class_in_module_of_loader(false, true));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2111
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2112
        return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2113
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2114
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2115
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2116
#ifdef ASSERT
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2117
    Symbol* ph_check = find_placeholder(name, loader_data);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2118
    assert(ph_check == NULL || ph_check == name, "invalid symbol");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2119
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2120
50036
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2121
    if (throwException == false) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2122
      if (constraints()->check_or_update(k, class_loader, name) == false) {
50036
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2123
        throwException = true;
51097
bef02342d179 8205611: Improve the wording of LinkageErrors to include module and class loader information
lfoltan
parents: 51070
diff changeset
  2124
        ss.print("loader constraint violation: loader %s", loader_data->loader_name_and_id());
50036
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2125
        ss.print(" wants to load %s %s.",
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2126
                 k->external_kind(), k->external_name());
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2127
        Klass *existing_klass = constraints()->find_constrained_klass(name, class_loader);
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2128
        if (existing_klass->class_loader() != class_loader()) {
51097
bef02342d179 8205611: Improve the wording of LinkageErrors to include module and class loader information
lfoltan
parents: 51070
diff changeset
  2129
          ss.print(" A different %s with the same name was previously loaded by %s. (%s)",
50036
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2130
                   existing_klass->external_kind(),
51097
bef02342d179 8205611: Improve the wording of LinkageErrors to include module and class loader information
lfoltan
parents: 51070
diff changeset
  2131
                   existing_klass->class_loader_data()->loader_name_and_id(),
bef02342d179 8205611: Improve the wording of LinkageErrors to include module and class loader information
lfoltan
parents: 51070
diff changeset
  2132
                   existing_klass->class_in_module_of_loader(false, true));
bef02342d179 8205611: Improve the wording of LinkageErrors to include module and class loader information
lfoltan
parents: 51070
diff changeset
  2133
        } else {
bef02342d179 8205611: Improve the wording of LinkageErrors to include module and class loader information
lfoltan
parents: 51070
diff changeset
  2134
          ss.print(" (%s)", k->class_in_module_of_loader(false, true));
50036
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2135
        }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2136
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2137
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2138
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2139
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2140
  // Throw error now if needed (cannot throw while holding
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2141
  // SystemDictionary_lock because of rank ordering)
50036
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2142
  if (throwException == true) {
e0dbf14885b8 8199852: Print more information about class loaders in LinkageErrors.
goetz
parents: 49931
diff changeset
  2143
    THROW_MSG(vmSymbols::java_lang_LinkageError(), ss.as_string());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2144
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2145
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2146
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2147
// Update class loader data dictionary - done after check_constraint and add_to_hierachy
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2148
// have been called.
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
  2149
void SystemDictionary::update_dictionary(unsigned int d_hash,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2150
                                         int p_index, unsigned int p_hash,
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2151
                                         InstanceKlass* k,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2152
                                         Handle class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2153
                                         TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2154
  // Compile_lock prevents systemDictionary updates during compilations
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2155
  assert_locked_or_safepoint(Compile_lock);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2156
  Symbol*  name  = k->name();
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2157
  ClassLoaderData *loader_data = class_loader_data(class_loader);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2158
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2159
  {
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2160
    MutexLocker mu1(SystemDictionary_lock, THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2161
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2162
    // See whether biased locking is enabled and if so set it for this
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2163
    // klass.
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2164
    // Note that this must be done past the last potential blocking
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2165
    // point / safepoint. We enable biased locking lazily using a
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2166
    // VM_Operation to iterate the SystemDictionary and installing the
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2167
    // biasable mark word into each InstanceKlass's prototype header.
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2168
    // To avoid race conditions where we accidentally miss enabling the
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2169
    // optimization for one class in the process of being added to the
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2170
    // dictionary, we must not safepoint after the test of
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2171
    // BiasedLocking::enabled().
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2172
    if (UseBiasedLocking && BiasedLocking::enabled()) {
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2173
      // Set biased locking bit for all loaded classes; it will be
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2174
      // cleared if revocation occurs too often for this type
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2175
      // NOTE that we must only do this when the class is initally
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2176
      // defined, not each time it is referenced from a new class loader
49658
8237a91c1cca 8199781: Don't use naked == for comparing oops
rkennke
parents: 49641
diff changeset
  2177
      if (oopDesc::equals(k->class_loader(), class_loader())) {
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2178
        k->set_prototype_header(markOopDesc::biased_locking_prototype());
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2179
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2180
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2181
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2182
    // Make a new dictionary entry.
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2183
    Dictionary* dictionary = loader_data->dictionary();
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
  2184
    InstanceKlass* sd_check = find_class(d_hash, name, dictionary);
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2185
    if (sd_check == NULL) {
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
  2186
      dictionary->add_klass(d_hash, name, k);
53322
8ba5b3c76857 8210094: Better loading of classloader classes
coleenp
parents: 52587
diff changeset
  2187
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2188
      notice_modification();
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2189
    }
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2190
  #ifdef ASSERT
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
  2191
    sd_check = find_class(d_hash, name, dictionary);
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2192
    assert (sd_check != NULL, "should have entry in dictionary");
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2193
    // Note: there may be a placeholder entry: for circularity testing
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2194
    // or for parallel defines
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2195
  #endif
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2196
    SystemDictionary_lock->notify_all();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2197
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2198
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2199
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2200
8314
057b1c20fd7e 6354181: nsk.logging.stress.threads.scmhml001 fails assertion in "src/share/vm/oops/instanceKlass.cpp, 111"
never
parents: 8076
diff changeset
  2201
// Try to find a class name using the loader constraints.  The
057b1c20fd7e 6354181: nsk.logging.stress.threads.scmhml001 fails assertion in "src/share/vm/oops/instanceKlass.cpp, 111"
never
parents: 8076
diff changeset
  2202
// loader constraints might know about a class that isn't fully loaded
057b1c20fd7e 6354181: nsk.logging.stress.threads.scmhml001 fails assertion in "src/share/vm/oops/instanceKlass.cpp, 111"
never
parents: 8076
diff changeset
  2203
// yet and these will be ignored.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2204
Klass* SystemDictionary::find_constrained_instance_or_array_klass(
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2205
                    Symbol* class_name, Handle class_loader, TRAPS) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2206
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2207
  // First see if it has been loaded directly.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2208
  // Force the protection domain to be null.  (This removes protection checks.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2209
  Handle no_protection_domain;
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2210
  Klass* klass = find_instance_or_array_klass(class_name, class_loader,
13952
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
  2211
                                              no_protection_domain, CHECK_NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2212
  if (klass != NULL)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2213
    return klass;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2214
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2215
  // Now look to see if it has been loaded elsewhere, and is subject to
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2216
  // a loader constraint that would require this loader to return the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2217
  // klass that is already loaded.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2218
  if (FieldType::is_array(class_name)) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2219
    // For array classes, their Klass*s are not kept in the
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2220
    // constraint table. The element Klass*s are.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2221
    FieldArrayInfo fd;
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2222
    BasicType t = FieldType::get_array_info(class_name, fd, CHECK_(NULL));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2223
    if (t != T_OBJECT) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2224
      klass = Universe::typeArrayKlassObj(t);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2225
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2226
      MutexLocker mu(SystemDictionary_lock, THREAD);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2227
      klass = constraints()->find_constrained_klass(fd.object_key(), class_loader);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2228
    }
5121
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2229
    // If element class already loaded, allocate array klass
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2230
    if (klass != NULL) {
14488
ab48109f7d1b 8001471: Klass::cast() does nothing
hseigel
parents: 14077
diff changeset
  2231
      klass = klass->array_klass_or_null(fd.dimension());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2232
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2233
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2234
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2235
    // Non-array classes are easy: simply check the constraint table.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2236
    klass = constraints()->find_constrained_klass(class_name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2237
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2238
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2239
  return klass;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2240
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2241
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2242
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2243
bool SystemDictionary::add_loader_constraint(Symbol* class_name,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2244
                                             Handle class_loader1,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2245
                                             Handle class_loader2,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2246
                                             Thread* THREAD) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2247
  ClassLoaderData* loader_data1 = class_loader_data(class_loader1);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2248
  ClassLoaderData* loader_data2 = class_loader_data(class_loader2);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2249
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2250
  Symbol* constraint_name = NULL;
51179
516acf6956a2 8207359: Make SymbolTable increment_refcount disallow zero
coleenp
parents: 51097
diff changeset
  2251
  // Needs to be in same scope as constraint_name in case a Symbol is created and
516acf6956a2 8207359: Make SymbolTable increment_refcount disallow zero
coleenp
parents: 51097
diff changeset
  2252
  // assigned to constraint_name.
516acf6956a2 8207359: Make SymbolTable increment_refcount disallow zero
coleenp
parents: 51097
diff changeset
  2253
  FieldArrayInfo fd;
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2254
  if (!FieldType::is_array(class_name)) {
5121
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2255
    constraint_name = class_name;
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2256
  } else {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2257
    // For array classes, their Klass*s are not kept in the
5121
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2258
    // constraint table. The element classes are.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2259
    BasicType t = FieldType::get_array_info(class_name, fd, CHECK_(false));
5121
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2260
    // primitive types always pass
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2261
    if (t != T_OBJECT) {
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2262
      return true;
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2263
    } else {
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2264
      constraint_name = fd.object_key();
5121
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2265
    }
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2266
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2267
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2268
  Dictionary* dictionary1 = loader_data1->dictionary();
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2269
  unsigned int d_hash1 = dictionary1->compute_hash(constraint_name);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2270
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2271
  Dictionary* dictionary2 = loader_data2->dictionary();
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2272
  unsigned int d_hash2 = dictionary2->compute_hash(constraint_name);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2273
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2274
  {
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2275
    MutexLocker mu_s(SystemDictionary_lock, THREAD);
47774
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
  2276
    InstanceKlass* klass1 = find_class(d_hash1, constraint_name, dictionary1);
69c081ca110a 8184765: Dynamically resize SystemDictionary
gziemski
parents: 47765
diff changeset
  2277
    InstanceKlass* klass2 = find_class(d_hash2, constraint_name, dictionary2);
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2278
    return constraints()->add_entry(constraint_name, klass1, class_loader1,
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2279
                                    klass2, class_loader2);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2280
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2281
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2282
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2283
// Add entry to resolution error table to record the error when the first
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2284
// attempt to resolve a reference to a class has failed.
33593
60764a78fa5c 8140274: methodHandles and constantPoolHandles should be passed as const references
coleenp
parents: 33198
diff changeset
  2285
void SystemDictionary::add_resolution_error(const constantPoolHandle& pool, int which,
24334
36096f7271f4 8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents: 23872
diff changeset
  2286
                                            Symbol* error, Symbol* message) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2287
  unsigned int hash = resolution_errors()->compute_hash(pool, which);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2288
  int index = resolution_errors()->hash_to_index(hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2289
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2290
    MutexLocker ml(SystemDictionary_lock, Thread::current());
24334
36096f7271f4 8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents: 23872
diff changeset
  2291
    resolution_errors()->add_entry(index, hash, pool, which, error, message);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2292
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2293
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2294
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2295
// Delete a resolution error for RedefineClasses for a constant pool is going away
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2296
void SystemDictionary::delete_resolution_error(ConstantPool* pool) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2297
  resolution_errors()->delete_entry(pool);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2298
}
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2299
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2300
// Lookup resolution error table. Returns error if found, otherwise NULL.
33593
60764a78fa5c 8140274: methodHandles and constantPoolHandles should be passed as const references
coleenp
parents: 33198
diff changeset
  2301
Symbol* SystemDictionary::find_resolution_error(const constantPoolHandle& pool, int which,
24334
36096f7271f4 8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents: 23872
diff changeset
  2302
                                                Symbol** message) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2303
  unsigned int hash = resolution_errors()->compute_hash(pool, which);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2304
  int index = resolution_errors()->hash_to_index(hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2305
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2306
    MutexLocker ml(SystemDictionary_lock, Thread::current());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2307
    ResolutionErrorEntry* entry = resolution_errors()->find_entry(index, hash, pool, which);
24334
36096f7271f4 8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents: 23872
diff changeset
  2308
    if (entry != NULL) {
36096f7271f4 8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents: 23872
diff changeset
  2309
      *message = entry->message();
36096f7271f4 8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents: 23872
diff changeset
  2310
      return entry->error();
36096f7271f4 8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents: 23872
diff changeset
  2311
    } else {
36096f7271f4 8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents: 23872
diff changeset
  2312
      return NULL;
36096f7271f4 8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents: 23872
diff changeset
  2313
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2314
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2315
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2316
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2317
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2318
// Signature constraints ensure that callers and callees agree about
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2319
// the meaning of type names in their signatures.  This routine is the
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2320
// intake for constraints.  It collects them from several places:
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2321
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2322
//  * LinkResolver::resolve_method (if check_access is true) requires
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2323
//    that the resolving class (the caller) and the defining class of
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2324
//    the resolved method (the callee) agree on each type in the
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2325
//    method's signature.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2326
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2327
//  * LinkResolver::resolve_interface_method performs exactly the same
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2328
//    checks.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2329
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2330
//  * LinkResolver::resolve_field requires that the constant pool
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2331
//    attempting to link to a field agree with the field's defining
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2332
//    class about the type of the field signature.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2333
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2334
//  * klassVtable::initialize_vtable requires that, when a class
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2335
//    overrides a vtable entry allocated by a superclass, that the
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2336
//    overriding method (i.e., the callee) agree with the superclass
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2337
//    on each type in the method's signature.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2338
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2339
//  * klassItable::initialize_itable requires that, when a class fills
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2340
//    in its itables, for each non-abstract method installed in an
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2341
//    itable, the method (i.e., the callee) agree with the interface
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2342
//    on each type in the method's signature.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2343
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2344
// All those methods have a boolean (check_access, checkconstraints)
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2345
// which turns off the checks.  This is used from specialized contexts
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2346
// such as bootstrapping, dumping, and debugging.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2347
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2348
// No direct constraint is placed between the class and its
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2349
// supertypes.  Constraints are only placed along linked relations
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2350
// between callers and callees.  When a method overrides or implements
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2351
// an abstract method in a supertype (superclass or interface), the
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2352
// constraints are placed as if the supertype were the caller to the
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2353
// overriding method.  (This works well, since callers to the
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2354
// supertype have already established agreement between themselves and
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2355
// the supertype.)  As a result of all this, a class can disagree with
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2356
// its supertype about the meaning of a type name, as long as that
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2357
// class neither calls a relevant method of the supertype, nor is
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2358
// called (perhaps via an override) from the supertype.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2359
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2360
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2361
// SystemDictionary::check_signature_loaders(sig, l1, l2)
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2362
//
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2363
// Make sure all class components (including arrays) in the given
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2364
// signature will be resolved to the same class in both loaders.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2365
// Returns the name of the type that failed a loader constraint check, or
16591
73047b0eb568 8009731: Confusing error message for loader constraint violation
acorn
parents: 16352
diff changeset
  2366
// NULL if no constraint failed.  No exception except OOME is thrown.
5121
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2367
// Arrays are not added to the loader constraint table, their elements are.
16591
73047b0eb568 8009731: Confusing error message for loader constraint violation
acorn
parents: 16352
diff changeset
  2368
Symbol* SystemDictionary::check_signature_loaders(Symbol* signature,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2369
                                               Handle loader1, Handle loader2,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2370
                                               bool is_method, TRAPS)  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2371
  // Nothing to do if loaders are the same.
49658
8237a91c1cca 8199781: Don't use naked == for comparing oops
rkennke
parents: 49641
diff changeset
  2372
  if (oopDesc::equals(loader1(), loader2())) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2373
    return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2374
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2375
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2376
  SignatureStream sig_strm(signature, is_method);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2377
  while (!sig_strm.is_done()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2378
    if (sig_strm.is_object()) {
16591
73047b0eb568 8009731: Confusing error message for loader constraint violation
acorn
parents: 16352
diff changeset
  2379
      Symbol* sig = sig_strm.as_symbol(CHECK_NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2380
      if (!add_loader_constraint(sig, loader1, loader2, THREAD)) {
16591
73047b0eb568 8009731: Confusing error message for loader constraint violation
acorn
parents: 16352
diff changeset
  2381
        return sig;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2382
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2383
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2384
    sig_strm.next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2385
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2386
  return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2387
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2388
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2389
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2390
methodHandle SystemDictionary::find_method_handle_intrinsic(vmIntrinsics::ID iid,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2391
                                                            Symbol* signature,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2392
                                                            TRAPS) {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2393
  methodHandle empty;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2394
  assert(MethodHandles::is_signature_polymorphic(iid) &&
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2395
         MethodHandles::is_signature_polymorphic_intrinsic(iid) &&
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2396
         iid != vmIntrinsics::_invokeGeneric,
33105
294e48b4f704 8080775: Better argument formatting for assert() and friends
david
parents: 32349
diff changeset
  2397
         "must be a known MH intrinsic iid=%d: %s", iid, vmIntrinsics::name_at(iid));
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2398
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2399
  unsigned int hash  = invoke_method_table()->compute_hash(signature, iid);
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2400
  int          index = invoke_method_table()->hash_to_index(hash);
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2401
  SymbolPropertyEntry* spe = invoke_method_table()->find_entry(index, hash, signature, iid);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2402
  methodHandle m;
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2403
  if (spe == NULL || spe->method() == NULL) {
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2404
    spe = NULL;
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2405
    // Must create lots of stuff here, but outside of the SystemDictionary lock.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2406
    m = Method::make_method_handle_intrinsic(iid, signature, CHECK_(empty));
26911
8f2c7a83220f 8058536: java/lang/instrument/NativeMethodPrefixAgent.java fails due to VirtualMachineError: out of space in CodeCache for method handle intrinsic
iveresov
parents: 26585
diff changeset
  2407
    if (!Arguments::is_interpreter_only()) {
8f2c7a83220f 8058536: java/lang/instrument/NativeMethodPrefixAgent.java fails due to VirtualMachineError: out of space in CodeCache for method handle intrinsic
iveresov
parents: 26585
diff changeset
  2408
      // Generate a compiled form of the MH intrinsic.
8f2c7a83220f 8058536: java/lang/instrument/NativeMethodPrefixAgent.java fails due to VirtualMachineError: out of space in CodeCache for method handle intrinsic
iveresov
parents: 26585
diff changeset
  2409
      AdapterHandlerLibrary::create_native_wrapper(m);
8f2c7a83220f 8058536: java/lang/instrument/NativeMethodPrefixAgent.java fails due to VirtualMachineError: out of space in CodeCache for method handle intrinsic
iveresov
parents: 26585
diff changeset
  2410
      // Check if have the compiled code.
8f2c7a83220f 8058536: java/lang/instrument/NativeMethodPrefixAgent.java fails due to VirtualMachineError: out of space in CodeCache for method handle intrinsic
iveresov
parents: 26585
diff changeset
  2411
      if (!m->has_compiled_code()) {
8f2c7a83220f 8058536: java/lang/instrument/NativeMethodPrefixAgent.java fails due to VirtualMachineError: out of space in CodeCache for method handle intrinsic
iveresov
parents: 26585
diff changeset
  2412
        THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(),
34213
3f99eccd6ea3 8067939: make Out of space in CodeCache messages consistent
tpivovarova
parents: 33612
diff changeset
  2413
                   "Out of space in CodeCache for method handle intrinsic", empty);
26911
8f2c7a83220f 8058536: java/lang/instrument/NativeMethodPrefixAgent.java fails due to VirtualMachineError: out of space in CodeCache for method handle intrinsic
iveresov
parents: 26585
diff changeset
  2414
      }
26585
2048b8d90c91 8058092: Test vm/mlvm/meth/stress/compiler/deoptimize. Assert in src/share/vm/classfile/systemDictionary.cpp: MH intrinsic invariant
iveresov
parents: 26583
diff changeset
  2415
    }
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2416
    // Now grab the lock.  We might have to throw away the new method,
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2417
    // if a racing thread has managed to install one at the same time.
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2418
    {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2419
      MutexLocker ml(SystemDictionary_lock, THREAD);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2420
      spe = invoke_method_table()->find_entry(index, hash, signature, iid);
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2421
      if (spe == NULL)
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2422
        spe = invoke_method_table()->add_entry(index, hash, signature, iid);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2423
      if (spe->method() == NULL)
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2424
        spe->set_method(m());
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2425
    }
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2426
  }
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2427
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2428
  assert(spe != NULL && spe->method() != NULL, "");
26585
2048b8d90c91 8058092: Test vm/mlvm/meth/stress/compiler/deoptimize. Assert in src/share/vm/classfile/systemDictionary.cpp: MH intrinsic invariant
iveresov
parents: 26583
diff changeset
  2429
  assert(Arguments::is_interpreter_only() || (spe->method()->has_compiled_code() &&
26580
8cca7fbe77b8 8056154: JVM crash with EXCEPTION_ACCESS_VIOLATION when there are many threads running
iveresov
parents: 26181
diff changeset
  2430
         spe->method()->code()->entry_point() == spe->method()->from_compiled_entry()),
8cca7fbe77b8 8056154: JVM crash with EXCEPTION_ACCESS_VIOLATION when there are many threads running
iveresov
parents: 26181
diff changeset
  2431
         "MH intrinsic invariant");
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2432
  return spe->method();
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2433
}
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2434
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2435
// Helper for unpacking the return value from linkMethod and linkCallSite.
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2436
static methodHandle unpack_method_and_appendix(Handle mname,
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2437
                                               Klass* accessing_klass,
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2438
                                               objArrayHandle appendix_box,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2439
                                               Handle* appendix_result,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2440
                                               TRAPS) {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2441
  methodHandle empty;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2442
  if (mname.not_null()) {
46505
fd4bc78630b1 8174749: Use hash table/oops for MemberName table
coleenp
parents: 46444
diff changeset
  2443
    Method* m = java_lang_invoke_MemberName::vmtarget(mname());
fd4bc78630b1 8174749: Use hash table/oops for MemberName table
coleenp
parents: 46444
diff changeset
  2444
    if (m != NULL) {
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2445
      oop appendix = appendix_box->obj_at(0);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2446
      if (TraceMethodHandles) {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2447
    #ifndef PRODUCT
35543
0961315f4016 8140659: C1: invokedynamic call patching violates JVMS-6.5.invokedynamic
vlivanov
parents: 34666
diff changeset
  2448
        ttyLocker ttyl;
24424
2658d7834c6e 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 24352
diff changeset
  2449
        tty->print("Linked method=" INTPTR_FORMAT ": ", p2i(m));
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2450
        m->print();
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2451
        if (appendix != NULL) { tty->print("appendix = "); appendix->print(); }
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2452
        tty->cr();
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2453
    #endif //PRODUCT
9630
d6419e4395e3 6939861: JVM should handle more conversion operations
never
parents: 9172
diff changeset
  2454
      }
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2455
      (*appendix_result) = Handle(THREAD, appendix);
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  2456
      // the target is stored in the cpCache and if a reference to this
49348
fde3feaaa4ed 8198926: Move ClassLoaderData::_dependencies to ClassLoaderData::_handles
coleenp
parents: 49340
diff changeset
  2457
      // MemberName is dropped we need a way to make sure the
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  2458
      // class_loader containing this method is kept alive.
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2459
      ClassLoaderData* this_key = accessing_klass->class_loader_data();
49348
fde3feaaa4ed 8198926: Move ClassLoaderData::_dependencies to ClassLoaderData::_handles
coleenp
parents: 49340
diff changeset
  2460
      this_key->record_dependency(m->method_holder());
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2461
      return methodHandle(THREAD, m);
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2462
    }
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2463
  }
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2464
  THROW_MSG_(vmSymbols::java_lang_LinkageError(), "bad value from MethodHandleNatives", empty);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2465
  return empty;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2466
}
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2467
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2468
methodHandle SystemDictionary::find_method_handle_invoker(Klass* klass,
36819
bca375d368ed 8149644: Integrate VarHandles
psandoz
parents: 36381
diff changeset
  2469
                                                          Symbol* name,
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2470
                                                          Symbol* signature,
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2471
                                                          Klass* accessing_klass,
13929
8da0dc50a6e4 7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
twisti
parents: 13753
diff changeset
  2472
                                                          Handle *appendix_result,
8da0dc50a6e4 7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
twisti
parents: 13753
diff changeset
  2473
                                                          Handle *method_type_result,
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2474
                                                          TRAPS) {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2475
  methodHandle empty;
33160
c59f1676d27e 8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents: 32349
diff changeset
  2476
  assert(THREAD->can_call_java() ,"");
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2477
  Handle method_type =
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2478
    SystemDictionary::find_method_handle_type(signature, accessing_klass, CHECK_(empty));
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2479
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2480
  int ref_kind = JVM_REF_invokeVirtual;
46271
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  2481
  oop name_oop = StringTable::intern(name, CHECK_(empty));
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  2482
  Handle name_str (THREAD, name_oop);
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  2483
  objArrayHandle appendix_box = oopFactory::new_objArray_handle(SystemDictionary::Object_klass(), 1, CHECK_(empty));
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2484
  assert(appendix_box->obj_at(0) == NULL, "");
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2485
21103
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2486
  // This should not happen.  JDK code should take care of that.
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2487
  if (accessing_klass == NULL || method_type.is_null()) {
21103
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2488
    THROW_MSG_(vmSymbols::java_lang_InternalError(), "bad invokehandle", empty);
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2489
  }
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2490
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2491
  // call java.lang.invoke.MethodHandleNatives::linkMethod(... String, MethodType) -> MemberName
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2492
  JavaCallArguments args;
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2493
  args.push_oop(Handle(THREAD, accessing_klass->java_mirror()));
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2494
  args.push_int(ref_kind);
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2495
  args.push_oop(Handle(THREAD, klass->java_mirror()));
46271
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  2496
  args.push_oop(name_str);
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  2497
  args.push_oop(method_type);
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  2498
  args.push_oop(appendix_box);
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2499
  JavaValue result(T_OBJECT);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2500
  JavaCalls::call_static(&result,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2501
                         SystemDictionary::MethodHandleNatives_klass(),
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2502
                         vmSymbols::linkMethod_name(),
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2503
                         vmSymbols::linkMethod_signature(),
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2504
                         &args, CHECK_(empty));
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2505
  Handle mname(THREAD, (oop) result.get_jobject());
13929
8da0dc50a6e4 7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
twisti
parents: 13753
diff changeset
  2506
  (*method_type_result) = method_type;
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  2507
  return unpack_method_and_appendix(mname, accessing_klass, appendix_box, appendix_result, THREAD);
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2508
}
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2509
31638
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2510
// Decide if we can globally cache a lookup of this class, to be returned to any client that asks.
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2511
// We must ensure that all class loaders everywhere will reach this class, for any client.
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2512
// This is a safe bet for public classes in java.lang, such as Object and String.
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2513
// We also include public classes in java.lang.invoke, because they appear frequently in system-level method types.
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2514
// Out of an abundance of caution, we do not include any other classes, not even for packages like java.util.
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2515
static bool is_always_visible_class(oop mirror) {
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2516
  Klass* klass = java_lang_Class::as_Klass(mirror);
33611
9abd65805e19 8139203: Consistent naming for klass type predicates
coleenp
parents: 33602
diff changeset
  2517
  if (klass->is_objArray_klass()) {
31638
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2518
    klass = ObjArrayKlass::cast(klass)->bottom_klass(); // check element type
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2519
  }
33611
9abd65805e19 8139203: Consistent naming for klass type predicates
coleenp
parents: 33602
diff changeset
  2520
  if (klass->is_typeArray_klass()) {
31638
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2521
    return true; // primitive array
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2522
  }
33611
9abd65805e19 8139203: Consistent naming for klass type predicates
coleenp
parents: 33602
diff changeset
  2523
  assert(klass->is_instance_klass(), "%s", klass->external_name());
31638
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2524
  return klass->is_public() &&
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2525
         (InstanceKlass::cast(klass)->is_same_class_package(SystemDictionary::Object_klass()) ||       // java.lang
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2526
          InstanceKlass::cast(klass)->is_same_class_package(SystemDictionary::MethodHandle_klass()));  // java.lang.invoke
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2527
}
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2528
48826
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2529
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2530
// Return the Java mirror (java.lang.Class instance) for a single-character
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2531
// descriptor.  This result, when available, is the same as produced by the
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2532
// heavier API point of the same name that takes a Symbol.
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2533
oop SystemDictionary::find_java_mirror_for_type(char signature_char) {
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2534
  return java_lang_Class::primitive_mirror(char2type(signature_char));
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2535
}
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2536
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2537
// Find or construct the Java mirror (java.lang.Class instance) for a
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2538
// for the given field type signature, as interpreted relative to the
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2539
// given class loader.  Handles primitives, void, references, arrays,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2540
// and all other reflectable types, except method types.
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2541
// N.B.  Code in reflection should use this entry point.
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2542
Handle SystemDictionary::find_java_mirror_for_type(Symbol* signature,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2543
                                                   Klass* accessing_klass,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2544
                                                   Handle class_loader,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2545
                                                   Handle protection_domain,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2546
                                                   SignatureStream::FailureMode failure_mode,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2547
                                                   TRAPS) {
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2548
  Handle empty;
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2549
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2550
  assert(accessing_klass == NULL || (class_loader.is_null() && protection_domain.is_null()),
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2551
         "one or the other, or perhaps neither");
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2552
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2553
  Symbol* type = signature;
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2554
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2555
  // What we have here must be a valid field descriptor,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2556
  // and all valid field descriptors are supported.
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2557
  // Produce the same java.lang.Class that reflection reports.
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2558
  if (type->utf8_length() == 1) {
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2559
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2560
    // It's a primitive.  (Void has a primitive mirror too.)
51997
9ce37fa2e179 8209138: Symbol constructor uses u1 as the element type of its name argument
hseigel
parents: 51959
diff changeset
  2561
    char ch = type->char_at(0);
48826
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2562
    assert(is_java_primitive(char2type(ch)) || ch == 'V', "");
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2563
    return Handle(THREAD, find_java_mirror_for_type(ch));
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2564
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2565
  } else if (FieldType::is_obj(type) || FieldType::is_array(type)) {
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2566
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2567
    // It's a reference type.
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2568
    if (accessing_klass != NULL) {
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2569
      class_loader      = Handle(THREAD, accessing_klass->class_loader());
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2570
      protection_domain = Handle(THREAD, accessing_klass->protection_domain());
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2571
    }
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2572
    Klass* constant_type_klass;
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2573
    if (failure_mode == SignatureStream::ReturnNull) {
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2574
      constant_type_klass = resolve_or_null(type, class_loader, protection_domain,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2575
                                            CHECK_(empty));
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2576
    } else {
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2577
      bool throw_error = (failure_mode == SignatureStream::NCDFError);
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2578
      constant_type_klass = resolve_or_fail(type, class_loader, protection_domain,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2579
                                            throw_error, CHECK_(empty));
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2580
    }
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2581
    if (constant_type_klass == NULL) {
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2582
      return Handle();  // report failure this way
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2583
    }
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2584
    Handle mirror(THREAD, constant_type_klass->java_mirror());
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2585
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2586
    // Check accessibility, emulating ConstantPool::verify_constant_pool_resolve.
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2587
    if (accessing_klass != NULL) {
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2588
      Klass* sel_klass = constant_type_klass;
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2589
      bool fold_type_to_class = true;
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2590
      LinkResolver::check_klass_accessability(accessing_klass, sel_klass,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2591
                                              fold_type_to_class, CHECK_(empty));
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2592
    }
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2593
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2594
    return mirror;
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2595
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2596
  }
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2597
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2598
  // Fall through to an error.
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2599
  assert(false, "unsupported mirror syntax");
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2600
  THROW_MSG_(vmSymbols::java_lang_InternalError(), "unsupported mirror syntax", empty);
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2601
}
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2602
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2603
8676
9098d4e927e1 7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents: 8675
diff changeset
  2604
// Ask Java code to find or construct a java.lang.invoke.MethodType for the given
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2605
// signature, as interpreted relative to the given class loader.
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2606
// Because of class loader constraints, all method handle usage must be
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2607
// consistent with this loader.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2608
Handle SystemDictionary::find_method_handle_type(Symbol* signature,
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2609
                                                 Klass* accessing_klass,
5420
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 5124
diff changeset
  2610
                                                 TRAPS) {
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2611
  Handle empty;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2612
  vmIntrinsics::ID null_iid = vmIntrinsics::_none;  // distinct from all method handle invoker intrinsics
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2613
  unsigned int hash  = invoke_method_table()->compute_hash(signature, null_iid);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2614
  int          index = invoke_method_table()->hash_to_index(hash);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2615
  SymbolPropertyEntry* spe = invoke_method_table()->find_entry(index, hash, signature, null_iid);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2616
  if (spe != NULL && spe->method_type() != NULL) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2617
    assert(java_lang_invoke_MethodType::is_instance(spe->method_type()), "");
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2618
    return Handle(THREAD, spe->method_type());
33160
c59f1676d27e 8136421: JEP 243: Java-Level JVM Compiler Interface
twisti
parents: 32349
diff changeset
  2619
  } else if (!THREAD->can_call_java()) {
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2620
    warning("SystemDictionary::find_method_handle_type called from compiler thread");  // FIXME
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2621
    return Handle();  // do not attempt from within compiler, unless it was cached
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2622
  }
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2623
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2624
  Handle class_loader, protection_domain;
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2625
  if (accessing_klass != NULL) {
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2626
    class_loader      = Handle(THREAD, accessing_klass->class_loader());
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2627
    protection_domain = Handle(THREAD, accessing_klass->protection_domain());
31638
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2628
  }
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2629
  bool can_be_cached = true;
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2630
  int npts = ArgumentCount(signature).size();
46271
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  2631
  objArrayHandle pts = oopFactory::new_objArray_handle(SystemDictionary::Class_klass(), npts, CHECK_(empty));
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2632
  int arg = 0;
31638
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2633
  Handle rt; // the return type from the signature
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2634
  ResourceMark rm(THREAD);
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2635
  for (SignatureStream ss(signature); !ss.is_done(); ss.next()) {
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2636
    oop mirror = NULL;
31638
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2637
    if (can_be_cached) {
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2638
      // Use neutral class loader to lookup candidate classes to be placed in the cache.
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2639
      mirror = ss.as_java_mirror(Handle(), Handle(),
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2640
                                 SignatureStream::ReturnNull, CHECK_(empty));
31638
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2641
      if (mirror == NULL || (ss.is_object() && !is_always_visible_class(mirror))) {
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2642
        // Fall back to accessing_klass context.
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2643
        can_be_cached = false;
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2644
      }
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2645
    }
31638
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2646
    if (!can_be_cached) {
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2647
      // Resolve, throwing a real error if it doesn't work.
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2648
      mirror = ss.as_java_mirror(class_loader, protection_domain,
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2649
                                 SignatureStream::NCDFError, CHECK_(empty));
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2650
    }
49592
77fb0be7d19f 8199946: Move load/store and encode/decode out of oopDesc
stefank
parents: 49352
diff changeset
  2651
    assert(mirror != NULL, "%s", ss.as_symbol(THREAD)->as_C_string());
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2652
    if (ss.at_return_type())
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2653
      rt = Handle(THREAD, mirror);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2654
    else
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2655
      pts->obj_at_put(arg++, mirror);
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2656
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2657
    // Check accessibility.
48826
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2658
    if (!java_lang_Class::is_primitive(mirror) && accessing_klass != NULL) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2659
      Klass* sel_klass = java_lang_Class::as_Klass(mirror);
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2660
      mirror = NULL;  // safety
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2661
      // Emulate ConstantPool::verify_constant_pool_resolve.
48826
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2662
      bool fold_type_to_class = true;
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2663
      LinkResolver::check_klass_accessability(accessing_klass, sel_klass,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2664
                                              fold_type_to_class, CHECK_(empty));
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2665
    }
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2666
  }
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2667
  assert(arg == npts, "");
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2668
42074
c069e5e285cb 8166974: invokedynamic implementation should not wrap Errors
psandoz
parents: 41739
diff changeset
  2669
  // call java.lang.invoke.MethodHandleNatives::findMethodHandleType(Class rt, Class[] pts) -> MethodType
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2670
  JavaCallArguments args(Handle(THREAD, rt()));
46271
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  2671
  args.push_oop(pts);
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2672
  JavaValue result(T_OBJECT);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2673
  JavaCalls::call_static(&result,
5420
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 5124
diff changeset
  2674
                         SystemDictionary::MethodHandleNatives_klass(),
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 5124
diff changeset
  2675
                         vmSymbols::findMethodHandleType_name(),
9116
9bc44be338d6 6981791: remove experimental code for JSR 292
jrose
parents: 8883
diff changeset
  2676
                         vmSymbols::findMethodHandleType_signature(),
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2677
                         &args, CHECK_(empty));
6463
f4362c8da849 6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
parents: 6062
diff changeset
  2678
  Handle method_type(THREAD, (oop) result.get_jobject());
f4362c8da849 6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
parents: 6062
diff changeset
  2679
31638
465816a45807 8075838: Method for typing MethodTypes
vlivanov
parents: 30764
diff changeset
  2680
  if (can_be_cached) {
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2681
    // We can cache this MethodType inside the JVM.
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2682
    MutexLocker ml(SystemDictionary_lock, THREAD);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2683
    spe = invoke_method_table()->find_entry(index, hash, signature, null_iid);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2684
    if (spe == NULL)
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2685
      spe = invoke_method_table()->add_entry(index, hash, signature, null_iid);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2686
    if (spe->method_type() == NULL) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2687
      spe->set_method_type(method_type());
6463
f4362c8da849 6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
parents: 6062
diff changeset
  2688
    }
f4362c8da849 6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
parents: 6062
diff changeset
  2689
  }
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2690
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2691
  // report back to the caller with the MethodType
6463
f4362c8da849 6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
parents: 6062
diff changeset
  2692
  return method_type;
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2693
}
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2694
48514
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2695
Handle SystemDictionary::find_field_handle_type(Symbol* signature,
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2696
                                                Klass* accessing_klass,
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2697
                                                TRAPS) {
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2698
  Handle empty;
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2699
  ResourceMark rm(THREAD);
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2700
  SignatureStream ss(signature, /*is_method=*/ false);
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2701
  if (!ss.is_done()) {
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2702
    Handle class_loader, protection_domain;
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2703
    if (accessing_klass != NULL) {
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2704
      class_loader      = Handle(THREAD, accessing_klass->class_loader());
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2705
      protection_domain = Handle(THREAD, accessing_klass->protection_domain());
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2706
    }
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2707
    oop mirror = ss.as_java_mirror(class_loader, protection_domain, SignatureStream::NCDFError, CHECK_(empty));
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2708
    ss.next();
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2709
    if (ss.is_done()) {
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2710
      return Handle(THREAD, mirror);
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2711
    }
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2712
  }
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2713
  return empty;
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2714
}
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2715
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2716
// Ask Java code to find or construct a method handle constant.
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2717
Handle SystemDictionary::link_method_handle_constant(Klass* caller,
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2718
                                                     int ref_kind, //e.g., JVM_REF_invokeVirtual
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2719
                                                     Klass* callee,
48514
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2720
                                                     Symbol* name,
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2721
                                                     Symbol* signature,
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2722
                                                     TRAPS) {
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2723
  Handle empty;
48514
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2724
  if (caller == NULL) {
21103
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2725
    THROW_MSG_(vmSymbols::java_lang_InternalError(), "bad MH constant", empty);
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2726
  }
48514
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2727
  Handle name_str      = java_lang_String::create_from_symbol(name,      CHECK_(empty));
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2728
  Handle signature_str = java_lang_String::create_from_symbol(signature, CHECK_(empty));
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2729
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2730
  // Put symbolic info from the MH constant into freshly created MemberName and resolve it.
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2731
  Handle mname = MemberName_klass()->allocate_instance_handle(CHECK_(empty));
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2732
  java_lang_invoke_MemberName::set_clazz(mname(), callee->java_mirror());
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2733
  java_lang_invoke_MemberName::set_name (mname(), name_str());
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2734
  java_lang_invoke_MemberName::set_type (mname(), signature_str());
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2735
  java_lang_invoke_MemberName::set_flags(mname(), MethodHandles::ref_kind_to_flags(ref_kind));
48596
860326263d1f 8194963: SystemDictionary::link_method_handle_constant() can't link MethodHandle.invoke()/invokeExact()
vlivanov
parents: 48514
diff changeset
  2736
860326263d1f 8194963: SystemDictionary::link_method_handle_constant() can't link MethodHandle.invoke()/invokeExact()
vlivanov
parents: 48514
diff changeset
  2737
  if (ref_kind == JVM_REF_invokeVirtual &&
50771
9ca95539747d 8195650: Method references to VarHandle accessors
psandoz
parents: 50735
diff changeset
  2738
      MethodHandles::is_signature_polymorphic_public_name(callee, name)) {
9ca95539747d 8195650: Method references to VarHandle accessors
psandoz
parents: 50735
diff changeset
  2739
    // Skip resolution for public signature polymorphic methods such as
9ca95539747d 8195650: Method references to VarHandle accessors
psandoz
parents: 50735
diff changeset
  2740
    // j.l.i.MethodHandle.invoke()/invokeExact() and those on VarHandle
9ca95539747d 8195650: Method references to VarHandle accessors
psandoz
parents: 50735
diff changeset
  2741
    // They require appendix argument which MemberName resolution doesn't handle.
9ca95539747d 8195650: Method references to VarHandle accessors
psandoz
parents: 50735
diff changeset
  2742
    // There's special logic on JDK side to handle them
48596
860326263d1f 8194963: SystemDictionary::link_method_handle_constant() can't link MethodHandle.invoke()/invokeExact()
vlivanov
parents: 48514
diff changeset
  2743
    // (see MethodHandles.linkMethodHandleConstant() and MethodHandles.findVirtualForMH()).
860326263d1f 8194963: SystemDictionary::link_method_handle_constant() can't link MethodHandle.invoke()/invokeExact()
vlivanov
parents: 48514
diff changeset
  2744
  } else {
49641
2ad3212a7dd9 8200238: Reduce number of exceptions created when calling MemberName$Factory::resolveOrNull
redestad
parents: 49594
diff changeset
  2745
    MethodHandles::resolve_MemberName(mname, caller, /*speculative_resolve*/false, CHECK_(empty));
48596
860326263d1f 8194963: SystemDictionary::link_method_handle_constant() can't link MethodHandle.invoke()/invokeExact()
vlivanov
parents: 48514
diff changeset
  2746
  }
48514
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2747
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2748
  // After method/field resolution succeeded, it's safe to resolve MH signature as well.
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2749
  Handle type = MethodHandles::resolve_MemberName_type(mname, caller, CHECK_(empty));
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2750
8676
9098d4e927e1 7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents: 8675
diff changeset
  2751
  // call java.lang.invoke.MethodHandleNatives::linkMethodHandleConstant(Class caller, int refKind, Class callee, String name, Object type) -> MethodHandle
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2752
  JavaCallArguments args;
46271
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  2753
  args.push_oop(Handle(THREAD, caller->java_mirror()));  // the referring class
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2754
  args.push_int(ref_kind);
46271
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  2755
  args.push_oop(Handle(THREAD, callee->java_mirror()));  // the target class
48514
9608f7f41c4e 8188145: MethodHandle resolution should follow JVMS sequence of lookup by name & type before type descriptor resolution
vlivanov
parents: 48138
diff changeset
  2756
  args.push_oop(name_str);
46271
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  2757
  args.push_oop(type);
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2758
  JavaValue result(T_OBJECT);
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2759
  JavaCalls::call_static(&result,
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2760
                         SystemDictionary::MethodHandleNatives_klass(),
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2761
                         vmSymbols::linkMethodHandleConstant_name(),
9116
9bc44be338d6 6981791: remove experimental code for JSR 292
jrose
parents: 8883
diff changeset
  2762
                         vmSymbols::linkMethodHandleConstant_signature(),
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2763
                         &args, CHECK_(empty));
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2764
  return Handle(THREAD, (oop) result.get_jobject());
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2765
}
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2766
48826
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2767
// Ask Java to compute a constant by invoking a BSM given a Dynamic_info CP entry
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2768
Handle SystemDictionary::link_dynamic_constant(Klass* caller,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2769
                                               int condy_index,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2770
                                               Handle bootstrap_specifier,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2771
                                               Symbol* name,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2772
                                               Symbol* type,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2773
                                               TRAPS) {
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2774
  Handle empty;
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2775
  Handle bsm, info;
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2776
  if (java_lang_invoke_MethodHandle::is_instance(bootstrap_specifier())) {
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2777
    bsm = bootstrap_specifier;
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2778
  } else {
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2779
    assert(bootstrap_specifier->is_objArray(), "");
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2780
    objArrayOop args = (objArrayOop) bootstrap_specifier();
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2781
    assert(args->length() == 2, "");
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2782
    bsm  = Handle(THREAD, args->obj_at(0));
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2783
    info = Handle(THREAD, args->obj_at(1));
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2784
  }
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2785
  guarantee(java_lang_invoke_MethodHandle::is_instance(bsm()),
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2786
            "caller must supply a valid BSM");
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2787
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2788
  // This should not happen.  JDK code should take care of that.
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2789
  if (caller == NULL) {
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2790
    THROW_MSG_(vmSymbols::java_lang_InternalError(), "bad dynamic constant", empty);
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2791
  }
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2792
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2793
  Handle constant_name = java_lang_String::create_from_symbol(name, CHECK_(empty));
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2794
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2795
  // Resolve the constant type in the context of the caller class
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2796
  Handle type_mirror = find_java_mirror_for_type(type, caller, SignatureStream::NCDFError,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2797
                                                 CHECK_(empty));
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2798
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2799
  // call java.lang.invoke.MethodHandleNatives::linkConstantDyanmic(caller, condy_index, bsm, type, info)
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2800
  JavaCallArguments args;
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2801
  args.push_oop(Handle(THREAD, caller->java_mirror()));
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2802
  args.push_int(condy_index);
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2803
  args.push_oop(bsm);
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2804
  args.push_oop(constant_name);
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2805
  args.push_oop(type_mirror);
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2806
  args.push_oop(info);
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2807
  JavaValue result(T_OBJECT);
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2808
  JavaCalls::call_static(&result,
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2809
                         SystemDictionary::MethodHandleNatives_klass(),
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2810
                         vmSymbols::linkDynamicConstant_name(),
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2811
                         vmSymbols::linkDynamicConstant_signature(),
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2812
                         &args, CHECK_(empty));
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2813
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2814
  return Handle(THREAD, (oop) result.get_jobject());
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2815
}
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2816
8676
9098d4e927e1 7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents: 8675
diff changeset
  2817
// Ask Java code to find or construct a java.lang.invoke.CallSite for the given
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2818
// name and signature, as interpreted relative to the given class loader.
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2819
methodHandle SystemDictionary::find_dynamic_call_site_invoker(Klass* caller,
48826
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2820
                                                              int indy_index,
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2821
                                                              Handle bootstrap_specifier,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2822
                                                              Symbol* name,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2823
                                                              Symbol* type,
13929
8da0dc50a6e4 7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
twisti
parents: 13753
diff changeset
  2824
                                                              Handle *appendix_result,
8da0dc50a6e4 7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
twisti
parents: 13753
diff changeset
  2825
                                                              Handle *method_type_result,
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2826
                                                              TRAPS) {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2827
  methodHandle empty;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2828
  Handle bsm, info;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2829
  if (java_lang_invoke_MethodHandle::is_instance(bootstrap_specifier())) {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2830
    bsm = bootstrap_specifier;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2831
  } else {
48826
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2832
    objArrayOop args = (objArrayOop) bootstrap_specifier();
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2833
    assert(args->length() == 2, "");
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2834
    bsm  = Handle(THREAD, args->obj_at(0));
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2835
    info = Handle(THREAD, args->obj_at(1));
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2836
  }
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2837
  guarantee(java_lang_invoke_MethodHandle::is_instance(bsm()),
6062
bab93afe9df7 6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents: 5882
diff changeset
  2838
            "caller must supply a valid BSM");
bab93afe9df7 6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents: 5882
diff changeset
  2839
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2840
  Handle method_name = java_lang_String::create_from_symbol(name, CHECK_(empty));
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2841
  Handle method_type = find_method_handle_type(type, caller, CHECK_(empty));
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2842
21103
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2843
  // This should not happen.  JDK code should take care of that.
46329
53ccc37bda19 8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents: 46327
diff changeset
  2844
  if (caller == NULL || method_type.is_null()) {
21103
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2845
    THROW_MSG_(vmSymbols::java_lang_InternalError(), "bad invokedynamic", empty);
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2846
  }
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2847
46271
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  2848
  objArrayHandle appendix_box = oopFactory::new_objArray_handle(SystemDictionary::Object_klass(), 1, CHECK_(empty));
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2849
  assert(appendix_box->obj_at(0) == NULL, "");
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2850
48826
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2851
  // call java.lang.invoke.MethodHandleNatives::linkCallSite(caller, indy_index, bsm, name, mtype, info, &appendix)
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2852
  JavaCallArguments args;
46271
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  2853
  args.push_oop(Handle(THREAD, caller->java_mirror()));
48826
c4d9d1b08e2e 8186209: Tool support for ConstantDynamic
psandoz
parents: 48596
diff changeset
  2854
  args.push_int(indy_index);
46271
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  2855
  args.push_oop(bsm);
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  2856
  args.push_oop(method_name);
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  2857
  args.push_oop(method_type);
979ebd346ecf 8169881: Remove implicit Handle conversions oop->Handle
coleenp
parents: 42876
diff changeset
  2858
  args.push_oop(info);
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2859
  args.push_oop(appendix_box);
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2860
  JavaValue result(T_OBJECT);
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2861
  JavaCalls::call_static(&result,
5420
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 5124
diff changeset
  2862
                         SystemDictionary::MethodHandleNatives_klass(),
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2863
                         vmSymbols::linkCallSite_name(),
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2864
                         vmSymbols::linkCallSite_signature(),
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2865
                         &args, CHECK_(empty));
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2866
  Handle mname(THREAD, (oop) result.get_jobject());
13929
8da0dc50a6e4 7200949: JSR 292: rubybench/bench/time/bench_base64.rb fails with jruby.jar not on boot class path
twisti
parents: 13753
diff changeset
  2867
  (*method_type_result) = method_type;
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  2868
  return unpack_method_and_appendix(mname, caller, appendix_box, appendix_result, THREAD);
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2869
}
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2870
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2871
// Protection domain cache table handling
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2872
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2873
ProtectionDomainCacheEntry* SystemDictionary::cache_get(Handle protection_domain) {
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2874
  return _pd_cache_table->get(protection_domain);
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2875
}
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2876
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2877
// ----------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2878
46742
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2879
void SystemDictionary::print_on(outputStream *st) {
52514
f4e3900c8d08 8213346: Re-implement shared dictionary using CompactHashtable
iklam
parents: 52498
diff changeset
  2880
  CDS_ONLY(SystemDictionaryShared::print_on(st));
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2881
  GCMutexLocker mu(SystemDictionary_lock);
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2882
46742
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2883
  ClassLoaderDataGraph::print_dictionary(st);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2884
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2885
  // Placeholders
46742
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2886
  placeholders()->print_on(st);
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2887
  st->cr();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2888
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2889
  // loader constraints - print under SD_lock
46742
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2890
  constraints()->print_on(st);
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2891
  st->cr();
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2892
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2893
  _pd_cache_table->print_on(st);
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2894
  st->cr();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2895
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2896
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2897
void SystemDictionary::verify() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2898
  guarantee(constraints() != NULL,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2899
            "Verify of loader constraints failed");
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2900
  guarantee(placeholders()->number_of_entries() >= 0,
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2901
            "Verify of placeholders failed");
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2902
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2903
  GCMutexLocker mu(SystemDictionary_lock);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2904
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2905
  // Verify dictionary
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2906
  ClassLoaderDataGraph::verify_dictionary();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2907
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2908
  placeholders()->verify();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2909
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2910
  // Verify constraint table
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2911
  guarantee(constraints() != NULL, "Verify of loader constraints failed");
46729
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2912
  constraints()->verify(placeholders());
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2913
c62d2e8b2728 7133093: Improve system dictionary performance
coleenp
parents: 46701
diff changeset
  2914
  _pd_cache_table->verify();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2915
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2916
46742
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2917
void SystemDictionary::dump(outputStream *st, bool verbose) {
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2918
  assert_locked_or_safepoint(SystemDictionary_lock);
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2919
  if (verbose) {
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2920
    print_on(st);
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2921
  } else {
52514
f4e3900c8d08 8213346: Re-implement shared dictionary using CompactHashtable
iklam
parents: 52498
diff changeset
  2922
    CDS_ONLY(SystemDictionaryShared::print_table_statistics(st));
46742
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2923
    ClassLoaderDataGraph::print_dictionary_statistics(st);
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2924
    placeholders()->print_table_statistics(st, "Placeholder Table");
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2925
    constraints()->print_table_statistics(st, "LoaderConstraints Table");
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2926
    _pd_cache_table->print_table_statistics(st, "ProtectionDomainCache Table");
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2927
  }
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2928
}
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2929
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2930
// Utility for dumping dictionaries.
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2931
SystemDictionaryDCmd::SystemDictionaryDCmd(outputStream* output, bool heap) :
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2932
                                 DCmdWithParser(output, heap),
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2933
  _verbose("-verbose", "Dump the content of each dictionary entry for all class loaders",
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2934
           "BOOLEAN", false, "false") {
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2935
  _dcmdparser.add_dcmd_option(&_verbose);
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2936
}
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2937
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2938
void SystemDictionaryDCmd::execute(DCmdSource source, TRAPS) {
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2939
  VM_DumpHashtable dumper(output(), VM_DumpHashtable::DumpSysDict,
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2940
                         _verbose.value());
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2941
  VMThread::execute(&dumper);
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2942
}
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2943
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2944
int SystemDictionaryDCmd::num_arguments() {
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2945
  ResourceMark rm;
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2946
  SystemDictionaryDCmd* dcmd = new SystemDictionaryDCmd(NULL, false);
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2947
  if (dcmd != NULL) {
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2948
    DCmdMark mark(dcmd);
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2949
    return dcmd->_dcmdparser.num_arguments();
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2950
  } else {
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2951
    return 0;
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2952
  }
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2953
}
24ec8a039c90 8184994: Add Dictionary size logging and jcmd
coleenp
parents: 46729
diff changeset
  2954
49738
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49658
diff changeset
  2955
void SystemDictionary::initialize_oop_storage() {
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49658
diff changeset
  2956
  _vm_weak_oop_storage =
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49658
diff changeset
  2957
    new OopStorage("VM Weak Oop Handles",
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49658
diff changeset
  2958
                   VMWeakAlloc_lock,
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49658
diff changeset
  2959
                   VMWeakActive_lock);
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49658
diff changeset
  2960
}
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49658
diff changeset
  2961
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49658
diff changeset
  2962
OopStorage* SystemDictionary::vm_weak_oop_storage() {
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49658
diff changeset
  2963
  assert(_vm_weak_oop_storage != NULL, "Uninitialized");
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49658
diff changeset
  2964
  return _vm_weak_oop_storage;
a7bc87a63dd8 8198313: Wrap holder object for ClassLoaderData in a WeakHandle
coleenp
parents: 49658
diff changeset
  2965
}