hotspot/src/share/vm/classfile/systemDictionary.cpp
author zmajo
Thu, 19 Mar 2015 18:01:39 +0100
changeset 29584 5b3cb9f0e39d
parent 29576 c223b0a9872e
parent 29580 a67a581cfe11
child 30764 fec48bf5a827
permissions -rw-r--r--
Merge
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/*
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 * Copyright (c) 1997, 2015, 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 "classfile/classLoaderData.inline.hpp"
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#include "classfile/dictionary.hpp"
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#include "classfile/javaClasses.inline.hpp"
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#include "classfile/loaderConstraints.hpp"
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#include "classfile/placeholders.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 "interpreter/bytecodeStream.hpp"
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#include "interpreter/interpreter.hpp"
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#include "memory/filemap.hpp"
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#include "memory/gcLocker.hpp"
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#include "memory/oopFactory.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/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/typeArrayKlass.hpp"
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#include "prims/jvmtiEnvBase.hpp"
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#include "prims/methodHandles.hpp"
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#include "runtime/arguments.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.inline.hpp"
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#include "runtime/signature.hpp"
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#include "services/classLoadingService.hpp"
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#include "services/threadService.hpp"
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#include "utilities/macros.hpp"
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#include "utilities/ticks.hpp"
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#if INCLUDE_CDS
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#include "classfile/sharedClassUtil.hpp"
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#include "classfile/systemDictionaryShared.hpp"
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#endif
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#if INCLUDE_TRACE
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#include "trace/tracing.hpp"
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#endif
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Dictionary*            SystemDictionary::_dictionary          = NULL;
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PlaceholderTable*      SystemDictionary::_placeholders        = NULL;
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Dictionary*            SystemDictionary::_shared_dictionary   = 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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int         SystemDictionary::_number_of_modifications = 0;
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int         SystemDictionary::_sdgeneration               = 0;
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const int   SystemDictionary::_primelist[_prime_array_size] = {1009,2017,4049,5051,10103,
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              20201,40423,99991};
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oop         SystemDictionary::_system_loader_lock_obj     =  NULL;
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Klass*      SystemDictionary::_well_known_klasses[SystemDictionary::WKID_LIMIT]
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                                                          =  { NULL /*, NULL...*/ };
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Klass*      SystemDictionary::_box_klasses[T_VOID+1]      =  { NULL /*, NULL...*/ };
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oop         SystemDictionary::_java_system_loader         =  NULL;
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bool        SystemDictionary::_has_loadClassInternal      =  false;
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bool        SystemDictionary::_has_checkPackageAccess     =  false;
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// lazily initialized klass variables
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Klass* volatile SystemDictionary::_abstract_ownable_synchronizer_klass = NULL;
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// ----------------------------------------------------------------------------
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// Java-level SystemLoader
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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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void SystemDictionary::compute_java_system_loader(TRAPS) {
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  KlassHandle system_klass(THREAD, WK_KLASS(ClassLoader_klass));
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  JavaValue result(T_OBJECT);
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  JavaCalls::call_static(&result,
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                         KlassHandle(THREAD, WK_KLASS(ClassLoader_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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  CDS_ONLY(SystemDictionaryShared::initialize(CHECK);)
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}
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ClassLoaderData* SystemDictionary::register_loader(Handle class_loader, TRAPS) {
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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, THREAD);
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}
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// ----------------------------------------------------------------------------
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// debugging
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#ifdef ASSERT
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// return true if class_name contains no '.' (internal format is '/')
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bool SystemDictionary::is_internal_format(Symbol* class_name) {
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  if (class_name != NULL) {
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    ResourceMark rm;
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    char* name = class_name->as_C_string();
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    return strchr(name, '.') == NULL;
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  } else {
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    return true;
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  }
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}
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#endif
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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 (UnsyncloadClass || 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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/**
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 * Returns true if the passed class loader is the extension class loader.
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 */
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bool SystemDictionary::is_ext_class_loader(Handle class_loader) {
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  if (class_loader.is_null()) {
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    return false;
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  }
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  return (class_loader->klass()->name() == vmSymbols::sun_misc_Launcher_ExtClassLoader());
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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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    KlassHandle k_h(THREAD, klass);
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    // can return a null klass
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    klass = handle_resolution_exception(class_name, throw_error, k_h, 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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                                                     KlassHandle klass_h, 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_h() == 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_h() == 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*)klass_h();
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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_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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  assert(!THREAD->is_Compiler_thread(),
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         err_msg("can not load classes with compiler thread: class=%s, classloader=%s",
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                 class_name->as_C_string(),
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                 class_loader.is_null() ? "null" : class_loader->klass()->name()->as_C_string()));
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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 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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    if (k != NULL) {
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      k = k->array_klass(fd.dimension(), CHECK_NULL);
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    }
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  } else {
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    k = Universe::typeArrayKlassObj(t);
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    k = TypeArrayKlass::cast(k)->array_klass(fd.dimension(), CHECK_NULL);
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  }
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  return k;
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}
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// Must be called for any super-class or super-interface resolution
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// during class definition to allow class circularity checking
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// super-interface callers:
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//    parse_interfaces - for defineClass & jvmtiRedefineClasses
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// super-class callers:
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//   ClassFileParser - for defineClass & jvmtiRedefineClasses
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//   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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//      a saved superclass [i.e. a defineClass is currently in progress]
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//      if another thread is trying to resolve the class, it must do
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//      super-class checks on its own thread to catch class circularity
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// This last call is critical in class circularity checking for cases
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// where classloading is delegated to different threads and the
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// classloader lock is released.
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// Take the case: Base->Super->Base
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//   1. If thread T1 tries to do a defineClass of class Base
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//    resolve_super_or_fail creates placeholder: T1, Base (super Super)
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//   2. resolve_instance_class_or_null does not find SD or placeholder for Super
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//    so it tries to load Super
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//   3. If we load the class internally, or user classloader uses same thread
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//      loadClassFromxxx or defineClass via parseClassFile Super ...
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//      3.1 resolve_super_or_fail creates placeholder: T1, Super (super Base)
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//      3.3 resolve_instance_class_or_null Base, finds placeholder for Base
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//      3.4 calls resolve_super_or_fail Base
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//      3.5 finds T1,Base -> throws class circularity
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//OR 4. If T2 tries to resolve Super via defineClass Super ...
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//      4.1 resolve_super_or_fail creates placeholder: T2, Super (super Base)
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//      4.2 resolve_instance_class_or_null Base, finds placeholder for Base (super Super)
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//      4.3 calls resolve_super_or_fail Super in parallel on own thread T2
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//      4.4 finds T2, Super -> throws class circularity
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// Must be called, even if superclass is null, since this is
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// where the placeholder entry is created which claims this
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// thread is loading this class/classloader.
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Klass* SystemDictionary::resolve_super_or_fail(Symbol* child_name,
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                                                 Symbol* class_name,
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                                                 Handle class_loader,
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                                                 Handle protection_domain,
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                                                 bool is_superclass,
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                                                 TRAPS) {
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  // Double-check, if child class is already loaded, just return super-class,interface
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  // Don't add a placedholder if already loaded, i.e. already in system dictionary
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  // Make sure there's a placeholder for the *child* before resolving.
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  // Used as a claim that this thread is currently loading superclass/classloader
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  // Used here for ClassCircularity checks and also for heap verification
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  // (every InstanceKlass in the heap needs to be in the system dictionary
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  // or have a placeholder).
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parents:
diff changeset
   329
  // Must check ClassCircularity before checking if super class is already loaded
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parents:
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   330
  //
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parents:
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   331
  // We might not already have a placeholder if this child_name was
489c9b5090e2 Initial load
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parents:
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   332
  // first seen via resolve_from_stream (jni_DefineClass or JVM_DefineClass);
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parents:
diff changeset
   333
  // the name of the class might not be known until the stream is actually
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parents:
diff changeset
   334
  // parsed.
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parents:
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   335
  // Bugs 4643874, 4715493
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parents:
diff changeset
   336
  // compute_hash can have a safepoint
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parents:
diff changeset
   337
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coleenp
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   338
  ClassLoaderData* loader_data = class_loader_data(class_loader);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
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   339
  unsigned int d_hash = dictionary()->compute_hash(child_name, loader_data);
1
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parents:
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   340
  int d_index = dictionary()->hash_to_index(d_hash);
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882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff changeset
   341
  unsigned int p_hash = placeholders()->compute_hash(child_name, loader_data);
1
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parents:
diff changeset
   342
  int p_index = placeholders()->hash_to_index(p_hash);
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parents:
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   343
  // can't throw error holding a lock
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parents:
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   344
  bool child_already_loaded = false;
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parents:
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   345
  bool throw_circularity_error = false;
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parents:
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   346
  {
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   347
    MutexLocker mu(SystemDictionary_lock, THREAD);
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   348
    Klass* childk = find_class(d_index, d_hash, child_name, loader_data);
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diff changeset
   349
    Klass* quicksuperk;
1
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parents:
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   350
    // to support // loading: if child done loading, just return superclass
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parents:
diff changeset
   351
    // if class_name, & class_loader don't match:
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parents:
diff changeset
   352
    // if initial define, SD update will give LinkageError
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parents:
diff changeset
   353
    // if redefine: compare_class_versions will give HIERARCHY_CHANGED
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parents:
diff changeset
   354
    // so we don't throw an exception here.
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parents:
diff changeset
   355
    // see: nsk redefclass014 & java.lang.instrument Instrument032
489c9b5090e2 Initial load
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parents:
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   356
    if ((childk != NULL ) && (is_superclass) &&
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
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diff changeset
   357
       ((quicksuperk = InstanceKlass::cast(childk)->super()) != NULL) &&
1
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parents:
diff changeset
   358
14488
ab48109f7d1b 8001471: Klass::cast() does nothing
hseigel
parents: 14077
diff changeset
   359
         ((quicksuperk->name() == class_name) &&
ab48109f7d1b 8001471: Klass::cast() does nothing
hseigel
parents: 14077
diff changeset
   360
            (quicksuperk->class_loader()  == class_loader()))) {
1
489c9b5090e2 Initial load
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parents:
diff changeset
   361
           return quicksuperk;
489c9b5090e2 Initial load
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parents:
diff changeset
   362
    } else {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   363
      PlaceholderEntry* probe = placeholders()->get_entry(p_index, p_hash, child_name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   364
      if (probe && probe->check_seen_thread(THREAD, PlaceholderTable::LOAD_SUPER)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   365
          throw_circularity_error = true;
489c9b5090e2 Initial load
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parents:
diff changeset
   366
      }
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   367
    }
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   368
    if (!throw_circularity_error) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   369
      PlaceholderEntry* newprobe = placeholders()->find_and_add(p_index, p_hash, child_name, loader_data, PlaceholderTable::LOAD_SUPER, class_name, THREAD);
1
489c9b5090e2 Initial load
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parents:
diff changeset
   370
    }
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parents:
diff changeset
   371
  }
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parents:
diff changeset
   372
  if (throw_circularity_error) {
489c9b5090e2 Initial load
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parents:
diff changeset
   373
      ResourceMark rm(THREAD);
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   374
      THROW_MSG_NULL(vmSymbols::java_lang_ClassCircularityError(), child_name->as_C_string());
1
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parents:
diff changeset
   375
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   376
489c9b5090e2 Initial load
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parents:
diff changeset
   377
// java.lang.Object should have been found above
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   378
  assert(class_name != NULL, "null super class for resolving");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   379
  // Resolve the super class or interface, check results on return
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   380
  Klass* superk = SystemDictionary::resolve_or_null(class_name,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   381
                                                 class_loader,
489c9b5090e2 Initial load
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parents:
diff changeset
   382
                                                 protection_domain,
489c9b5090e2 Initial load
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parents:
diff changeset
   383
                                                 THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   384
489c9b5090e2 Initial load
duke
parents:
diff changeset
   385
  KlassHandle superk_h(THREAD, superk);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   386
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   387
  // 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
   388
  // 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
   389
  // 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
   390
  // 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
   391
  // 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
   392
  // the loader_data. parseClassFile adds the instanceKlass to loader_data.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   393
  {
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   394
    MutexLocker mu(SystemDictionary_lock, THREAD);
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   395
    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
   396
    SystemDictionary_lock->notify_all();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   397
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   398
  if (HAS_PENDING_EXCEPTION || superk_h() == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   399
    // can null superk
24334
36096f7271f4 8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents: 23872
diff changeset
   400
    superk_h = KlassHandle(THREAD, handle_resolution_exception(class_name, true, superk_h, THREAD));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   401
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   402
489c9b5090e2 Initial load
duke
parents:
diff changeset
   403
  return superk_h();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   404
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   405
489c9b5090e2 Initial load
duke
parents:
diff changeset
   406
void SystemDictionary::validate_protection_domain(instanceKlassHandle klass,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   407
                                                  Handle class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   408
                                                  Handle protection_domain,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   409
                                                  TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   410
  if(!has_checkPackageAccess()) return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   411
489c9b5090e2 Initial load
duke
parents:
diff changeset
   412
  // Now we have to call back to java to check if the initating class has access
489c9b5090e2 Initial load
duke
parents:
diff changeset
   413
  JavaValue result(T_VOID);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   414
  if (TraceProtectionDomainVerification) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   415
    // Print out trace information
489c9b5090e2 Initial load
duke
parents:
diff changeset
   416
    tty->print_cr("Checking package access");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   417
    tty->print(" - class loader:      "); class_loader()->print_value_on(tty);      tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   418
    tty->print(" - protection domain: "); protection_domain()->print_value_on(tty); tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   419
    tty->print(" - loading:           "); klass()->print_value_on(tty);             tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   420
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   421
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
   422
  KlassHandle system_loader(THREAD, SystemDictionary::ClassLoader_klass());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   423
  JavaCalls::call_special(&result,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   424
                         class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   425
                         system_loader,
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   426
                         vmSymbols::checkPackageAccess_name(),
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   427
                         vmSymbols::class_protectiondomain_signature(),
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   428
                         Handle(THREAD, klass->java_mirror()),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   429
                         protection_domain,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   430
                         THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   431
489c9b5090e2 Initial load
duke
parents:
diff changeset
   432
  if (TraceProtectionDomainVerification) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   433
    if (HAS_PENDING_EXCEPTION) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   434
      tty->print_cr(" -> DENIED !!!!!!!!!!!!!!!!!!!!!");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   435
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   436
     tty->print_cr(" -> granted");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   437
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   438
    tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   439
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   440
489c9b5090e2 Initial load
duke
parents:
diff changeset
   441
  if (HAS_PENDING_EXCEPTION) return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   442
489c9b5090e2 Initial load
duke
parents:
diff changeset
   443
  // If no exception has been thrown, we have validated the protection domain
489c9b5090e2 Initial load
duke
parents:
diff changeset
   444
  // Insert the protection domain of the initiating class into the set.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   445
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   446
    // We recalculate the entry here -- we've called out to java since
489c9b5090e2 Initial load
duke
parents:
diff changeset
   447
    // the last time it was calculated.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   448
    ClassLoaderData* loader_data = class_loader_data(class_loader);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   449
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   450
    Symbol*  kn = klass->name();
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   451
    unsigned int d_hash = dictionary()->compute_hash(kn, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   452
    int d_index = dictionary()->hash_to_index(d_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   453
489c9b5090e2 Initial load
duke
parents:
diff changeset
   454
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   455
    {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   456
      // Note that we have an entry, and entries can be deleted only during GC,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   457
      // so we cannot allow GC to occur while we're holding this entry.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   458
489c9b5090e2 Initial load
duke
parents:
diff changeset
   459
      // We're using a No_Safepoint_Verifier to catch any place where we
489c9b5090e2 Initial load
duke
parents:
diff changeset
   460
      // might potentially do a GC at all.
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   461
      // Dictionary::do_unloading() asserts that classes in SD are only
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   462
      // unloaded at a safepoint. Anonymous classes are not in SD.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   463
      No_Safepoint_Verifier nosafepoint;
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   464
      dictionary()->add_protection_domain(d_index, d_hash, klass, loader_data,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   465
                                          protection_domain, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   466
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   467
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   468
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   469
489c9b5090e2 Initial load
duke
parents:
diff changeset
   470
// We only get here if this thread finds that another thread
489c9b5090e2 Initial load
duke
parents:
diff changeset
   471
// has already claimed the placeholder token for the current operation,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   472
// but that other thread either never owned or gave up the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   473
// object lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   474
// Waits on SystemDictionary_lock to indicate placeholder table updated
489c9b5090e2 Initial load
duke
parents:
diff changeset
   475
// On return, caller must recheck placeholder table state
489c9b5090e2 Initial load
duke
parents:
diff changeset
   476
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   477
// We only get here if
489c9b5090e2 Initial load
duke
parents:
diff changeset
   478
//  1) custom classLoader, i.e. not bootstrap classloader
489c9b5090e2 Initial load
duke
parents:
diff changeset
   479
//  2) UnsyncloadClass not set
489c9b5090e2 Initial load
duke
parents:
diff changeset
   480
//  3) custom classLoader has broken the class loader objectLock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   481
//     so another thread got here in parallel
489c9b5090e2 Initial load
duke
parents:
diff changeset
   482
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   483
// lockObject must be held.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   484
// Complicated dance due to lock ordering:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   485
// Must first release the classloader object lock to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   486
// allow initial definer to complete the class definition
489c9b5090e2 Initial load
duke
parents:
diff changeset
   487
// and to avoid deadlock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   488
// Reclaim classloader lock object with same original recursion count
489c9b5090e2 Initial load
duke
parents:
diff changeset
   489
// Must release SystemDictionary_lock after notify, since
489c9b5090e2 Initial load
duke
parents:
diff changeset
   490
// class loader lock must be claimed before SystemDictionary_lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   491
// to prevent deadlocks
489c9b5090e2 Initial load
duke
parents:
diff changeset
   492
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   493
// The notify allows applications that did an untimed wait() on
489c9b5090e2 Initial load
duke
parents:
diff changeset
   494
// the classloader object lock to not hang.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   495
void SystemDictionary::double_lock_wait(Handle lockObject, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   496
  assert_lock_strong(SystemDictionary_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   497
489c9b5090e2 Initial load
duke
parents:
diff changeset
   498
  bool calledholdinglock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   499
      = ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, lockObject);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   500
  assert(calledholdinglock,"must hold lock for notify");
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   501
  assert((!(lockObject() == _system_loader_lock_obj) && !is_parallelCapable(lockObject)), "unexpected double_lock_wait");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
  ObjectSynchronizer::notifyall(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
  intptr_t recursions =  ObjectSynchronizer::complete_exit(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   504
  SystemDictionary_lock->wait();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
  SystemDictionary_lock->unlock();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
  ObjectSynchronizer::reenter(lockObject, recursions, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
  SystemDictionary_lock->lock();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   509
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
// If the class in is in the placeholder table, class loading is in progress
489c9b5090e2 Initial load
duke
parents:
diff changeset
   511
// For cases where the application changes threads to load classes, it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   512
// is critical to ClassCircularity detection that we try loading
489c9b5090e2 Initial load
duke
parents:
diff changeset
   513
// the superclass on the same thread internally, so we do parallel
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
// super class loading here.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
// This also is critical in cases where the original thread gets stalled
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
// even in non-circularity situations.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
// Note: must call resolve_super_or_fail even if null super -
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   518
// to force placeholder entry creation for this class for circularity detection
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
// Caller must check for pending exception
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   520
// Returns non-null Klass* if other thread has completed load
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
// and we are done,
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   522
// If return null Klass* and no pending exception, the caller must load the class
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   523
instanceKlassHandle SystemDictionary::handle_parallel_super_load(
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   524
    Symbol* name, Symbol* superclassname, Handle class_loader,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   525
    Handle protection_domain, Handle lockObject, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   526
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
  instanceKlassHandle nh = instanceKlassHandle(); // null Handle
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   528
  ClassLoaderData* loader_data = class_loader_data(class_loader);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   529
  unsigned int d_hash = dictionary()->compute_hash(name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   530
  int d_index = dictionary()->hash_to_index(d_hash);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   531
  unsigned int p_hash = placeholders()->compute_hash(name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   532
  int p_index = placeholders()->hash_to_index(p_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   533
489c9b5090e2 Initial load
duke
parents:
diff changeset
   534
  // superk is not used, resolve_super called for circularity check only
489c9b5090e2 Initial load
duke
parents:
diff changeset
   535
  // This code is reached in two situations. One if this thread
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
  // is loading the same class twice (e.g. ClassCircularity, or
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
  // java.lang.instrument).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   538
  // The second is if another thread started the resolve_super first
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
  // and has not yet finished.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
  // In both cases the original caller will clean up the placeholder
489c9b5090e2 Initial load
duke
parents:
diff changeset
   541
  // entry on error.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   542
  Klass* superk = SystemDictionary::resolve_super_or_fail(name,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
                                                          superclassname,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
                                                          class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
                                                          protection_domain,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
                                                          true,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
                                                          CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   548
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   549
  // parallelCapable class loaders do NOT wait for parallel superclass loads to complete
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   550
  // Serial class loaders and bootstrap classloader do wait for superclass loads
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   551
 if (!class_loader.is_null() && is_parallelCapable(class_loader)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   553
    // Check if classloading completed while we were loading superclass or waiting
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   554
    Klass* check = find_class(d_index, d_hash, name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
    if (check != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   556
      // Klass is already loaded, so just return it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
      return(instanceKlassHandle(THREAD, check));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   558
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   559
      return nh;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   560
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   561
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   562
489c9b5090e2 Initial load
duke
parents:
diff changeset
   563
  // must loop to both handle other placeholder updates
489c9b5090e2 Initial load
duke
parents:
diff changeset
   564
  // and spurious notifications
489c9b5090e2 Initial load
duke
parents:
diff changeset
   565
  bool super_load_in_progress = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   566
  PlaceholderEntry* placeholder;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   567
  while (super_load_in_progress) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   568
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   569
    // Check if classloading completed while we were loading superclass or waiting
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   570
    Klass* check = find_class(d_index, d_hash, name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   571
    if (check != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   572
      // Klass is already loaded, so just return it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   573
      return(instanceKlassHandle(THREAD, check));
489c9b5090e2 Initial load
duke
parents:
diff changeset
   574
    } else {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   575
      placeholder = placeholders()->get_entry(p_index, p_hash, name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   576
      if (placeholder && placeholder->super_load_in_progress() ){
489c9b5090e2 Initial load
duke
parents:
diff changeset
   577
        // Before UnsyncloadClass:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   578
        // We only get here if the application has released the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   579
        // classloader lock when another thread was in the middle of loading a
489c9b5090e2 Initial load
duke
parents:
diff changeset
   580
        // superclass/superinterface for this class, and now
489c9b5090e2 Initial load
duke
parents:
diff changeset
   581
        // this thread is also trying to load this class.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   582
        // To minimize surprises, the first thread that started to
489c9b5090e2 Initial load
duke
parents:
diff changeset
   583
        // load a class should be the one to complete the loading
489c9b5090e2 Initial load
duke
parents:
diff changeset
   584
        // with the classfile it initially expected.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   585
        // This logic has the current thread wait once it has done
489c9b5090e2 Initial load
duke
parents:
diff changeset
   586
        // all the superclass/superinterface loading it can, until
489c9b5090e2 Initial load
duke
parents:
diff changeset
   587
        // 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
   588
        // If it completes we will use the resulting InstanceKlass
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   589
        // which we will find below in the systemDictionary.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   590
        // We also get here for parallel bootstrap classloader
489c9b5090e2 Initial load
duke
parents:
diff changeset
   591
        if (class_loader.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   592
          SystemDictionary_lock->wait();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   593
        } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   594
          double_lock_wait(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   595
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   596
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   597
        // If not in SD and not in PH, other thread's load must have failed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   598
        super_load_in_progress = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   599
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   600
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   601
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   602
  return (nh);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   603
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   604
489c9b5090e2 Initial load
duke
parents:
diff changeset
   605
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
   606
Klass* SystemDictionary::resolve_instance_class_or_null(Symbol* name,
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
   607
                                                        Handle class_loader,
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
   608
                                                        Handle protection_domain,
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
   609
                                                        TRAPS) {
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   610
  assert(name != NULL && !FieldType::is_array(name) &&
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   611
         !FieldType::is_obj(name), "invalid class name");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   612
21767
41eaa9a17059 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents: 21103
diff changeset
   613
  Ticks class_load_start_time = Ticks::now();
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
   614
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   615
  // Fix for 4474172; see evaluation for more details
489c9b5090e2 Initial load
duke
parents:
diff changeset
   616
  class_loader = Handle(THREAD, java_lang_ClassLoader::non_reflection_class_loader(class_loader()));
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
   617
  ClassLoaderData *loader_data = register_loader(class_loader, CHECK_NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   618
489c9b5090e2 Initial load
duke
parents:
diff changeset
   619
  // Do lookup to see if class already exist and the protection domain
489c9b5090e2 Initial load
duke
parents:
diff changeset
   620
  // has the right access
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   621
  // This call uses find which checks protection domain already matches
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   622
  // 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
   623
  // 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
   624
  // to allow returning the Klass* and add it to the pd_set if it is valid
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   625
  unsigned int d_hash = dictionary()->compute_hash(name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   626
  int d_index = dictionary()->hash_to_index(d_hash);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   627
  Klass* probe = dictionary()->find(d_index, d_hash, name, loader_data,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   628
                                      protection_domain, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   629
  if (probe != NULL) return probe;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   630
489c9b5090e2 Initial load
duke
parents:
diff changeset
   631
489c9b5090e2 Initial load
duke
parents:
diff changeset
   632
  // Non-bootstrap class loaders will call out to class loader and
489c9b5090e2 Initial load
duke
parents:
diff changeset
   633
  // define via jvm/jni_DefineClass which will acquire the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   634
  // class loader object lock to protect against multiple threads
489c9b5090e2 Initial load
duke
parents:
diff changeset
   635
  // defining the class in parallel by accident.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   636
  // This lock must be acquired here so the waiter will find
489c9b5090e2 Initial load
duke
parents:
diff changeset
   637
  // any successful result in the SystemDictionary and not attempt
489c9b5090e2 Initial load
duke
parents:
diff changeset
   638
  // the define
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   639
  // ParallelCapable Classloaders and the bootstrap classloader,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   640
  // or all classloaders with UnsyncloadClass do not acquire lock here
489c9b5090e2 Initial load
duke
parents:
diff changeset
   641
  bool DoObjectLock = true;
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   642
  if (is_parallelCapable(class_loader)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   643
    DoObjectLock = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   644
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   645
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   646
  unsigned int p_hash = placeholders()->compute_hash(name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   647
  int p_index = placeholders()->hash_to_index(p_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   648
489c9b5090e2 Initial load
duke
parents:
diff changeset
   649
  // Class is not in SystemDictionary so we have to do loading.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   650
  // Make sure we are synchronized on the class loader before we proceed
489c9b5090e2 Initial load
duke
parents:
diff changeset
   651
  Handle lockObject = compute_loader_lock_object(class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   652
  check_loader_lock_contention(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   653
  ObjectLocker ol(lockObject, THREAD, DoObjectLock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   654
489c9b5090e2 Initial load
duke
parents:
diff changeset
   655
  // Check again (after locking) if class already exist in SystemDictionary
489c9b5090e2 Initial load
duke
parents:
diff changeset
   656
  bool class_has_been_loaded   = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   657
  bool super_load_in_progress  = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   658
  bool havesupername = false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   659
  instanceKlassHandle k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   660
  PlaceholderEntry* placeholder;
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   661
  Symbol* superclassname = NULL;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   662
489c9b5090e2 Initial load
duke
parents:
diff changeset
   663
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   664
    MutexLocker mu(SystemDictionary_lock, THREAD);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   665
    Klass* check = find_class(d_index, d_hash, name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   666
    if (check != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   667
      // Klass is already loaded, so just return it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   668
      class_has_been_loaded = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   669
      k = instanceKlassHandle(THREAD, check);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   670
    } else {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   671
      placeholder = placeholders()->get_entry(p_index, p_hash, name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   672
      if (placeholder && placeholder->super_load_in_progress()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   673
         super_load_in_progress = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   674
         if (placeholder->havesupername() == true) {
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   675
           superclassname = placeholder->supername();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   676
           havesupername = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   677
         }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   678
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   679
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   680
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   681
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   682
  // If the class is in the placeholder table, class loading is in progress
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   683
  if (super_load_in_progress && havesupername==true) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   684
    k = SystemDictionary::handle_parallel_super_load(name, superclassname,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   685
        class_loader, protection_domain, lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   686
    if (HAS_PENDING_EXCEPTION) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   687
      return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   688
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   689
    if (!k.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   690
      class_has_been_loaded = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   691
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   692
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   693
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   694
  bool throw_circularity_error = false;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   695
  if (!class_has_been_loaded) {
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   696
    bool load_instance_added = false;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   697
489c9b5090e2 Initial load
duke
parents:
diff changeset
   698
    // add placeholder entry to record loading instance class
489c9b5090e2 Initial load
duke
parents:
diff changeset
   699
    // Five cases:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   700
    // All cases need to prevent modifying bootclasssearchpath
489c9b5090e2 Initial load
duke
parents:
diff changeset
   701
    // in parallel with a classload of same classname
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   702
    // Redefineclasses uses existence of the placeholder for the duration
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   703
    // of the class load to prevent concurrent redefinition of not completely
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   704
    // defined classes.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   705
    // case 1. traditional classloaders that rely on the classloader object lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   706
    //   - no other need for LOAD_INSTANCE
489c9b5090e2 Initial load
duke
parents:
diff changeset
   707
    // case 2. traditional classloaders that break the classloader object lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   708
    //    as a deadlock workaround. Detection of this case requires that
489c9b5090e2 Initial load
duke
parents:
diff changeset
   709
    //    this check is done while holding the classloader object lock,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   710
    //    and that lock is still held when calling classloader's loadClass.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   711
    //    For these classloaders, we ensure that the first requestor
489c9b5090e2 Initial load
duke
parents:
diff changeset
   712
    //    completes the load and other requestors wait for completion.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   713
    // case 3. UnsyncloadClass - don't use objectLocker
489c9b5090e2 Initial load
duke
parents:
diff changeset
   714
    //    With this flag, we allow parallel classloading of a
489c9b5090e2 Initial load
duke
parents:
diff changeset
   715
    //    class/classloader pair
489c9b5090e2 Initial load
duke
parents:
diff changeset
   716
    // case4. Bootstrap classloader - don't own objectLocker
489c9b5090e2 Initial load
duke
parents:
diff changeset
   717
    //    This classloader supports parallelism at the classloader level,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   718
    //    but only allows a single load of a class/classloader pair.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   719
    //    No performance benefit and no deadlock issues.
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   720
    // case 5. parallelCapable user level classloaders - without objectLocker
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   721
    //    Allow parallel classloading of a class/classloader pair
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   722
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   723
    {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   724
      MutexLocker mu(SystemDictionary_lock, THREAD);
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   725
      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
   726
        PlaceholderEntry* oldprobe = placeholders()->get_entry(p_index, p_hash, name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   727
        if (oldprobe) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   728
          // only need check_seen_thread once, not on each loop
489c9b5090e2 Initial load
duke
parents:
diff changeset
   729
          // 6341374 java/lang/Instrument with -Xcomp
489c9b5090e2 Initial load
duke
parents:
diff changeset
   730
          if (oldprobe->check_seen_thread(THREAD, PlaceholderTable::LOAD_INSTANCE)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   731
            throw_circularity_error = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   732
          } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   733
            // case 1: traditional: should never see load_in_progress.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   734
            while (!class_has_been_loaded && oldprobe && oldprobe->instance_load_in_progress()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   735
489c9b5090e2 Initial load
duke
parents:
diff changeset
   736
              // case 4: bootstrap classloader: prevent futile classloading,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   737
              // wait on first requestor
489c9b5090e2 Initial load
duke
parents:
diff changeset
   738
              if (class_loader.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   739
                SystemDictionary_lock->wait();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   740
              } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   741
              // case 2: traditional with broken classloader lock. wait on first
489c9b5090e2 Initial load
duke
parents:
diff changeset
   742
              // requestor.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   743
                double_lock_wait(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   744
              }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   745
              // Check if classloading completed while we were waiting
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   746
              Klass* check = find_class(d_index, d_hash, name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   747
              if (check != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   748
                // Klass is already loaded, so just return it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   749
                k = instanceKlassHandle(THREAD, check);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   750
                class_has_been_loaded = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   751
              }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   752
              // 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
   753
              oldprobe = placeholders()->get_entry(p_index, p_hash, name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   754
            }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   755
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   756
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   757
      }
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   758
      // All cases: add LOAD_INSTANCE holding SystemDictionary_lock
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   759
      // case 3: UnsyncloadClass || case 5: parallelCapable: allow competing threads to try
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   760
      // LOAD_INSTANCE in parallel
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   761
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   762
      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
   763
        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
   764
        load_instance_added = true;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   765
        // For class loaders that do not acquire the classloader object lock,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   766
        // if they did not catch another thread holding LOAD_INSTANCE,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   767
        // need a check analogous to the acquire ObjectLocker/find_class
489c9b5090e2 Initial load
duke
parents:
diff changeset
   768
        // i.e. now that we hold the LOAD_INSTANCE token on loading this class/CL
489c9b5090e2 Initial load
duke
parents:
diff changeset
   769
        // one final check if the load has already completed
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   770
        // class loaders holding the ObjectLock shouldn't find the class here
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   771
        Klass* check = find_class(d_index, d_hash, name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   772
        if (check != NULL) {
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   773
        // Klass is already loaded, so return it after checking/adding protection domain
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   774
          k = instanceKlassHandle(THREAD, check);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   775
          class_has_been_loaded = true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   776
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   777
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   778
    }
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   779
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   780
    // must throw error outside of owning lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
   781
    if (throw_circularity_error) {
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   782
      assert(!HAS_PENDING_EXCEPTION && load_instance_added == false,"circularity error cleanup");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   783
      ResourceMark rm(THREAD);
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   784
      THROW_MSG_NULL(vmSymbols::java_lang_ClassCircularityError(), name->as_C_string());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   785
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   786
489c9b5090e2 Initial load
duke
parents:
diff changeset
   787
    if (!class_has_been_loaded) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   788
489c9b5090e2 Initial load
duke
parents:
diff changeset
   789
      // Do actual loading
489c9b5090e2 Initial load
duke
parents:
diff changeset
   790
      k = load_instance_class(name, class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   791
4445
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
   792
      // For UnsyncloadClass only
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   793
      // If they got a linkageError, check if a parallel class load succeeded.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   794
      // If it did, then for bytecode resolution the specification requires
489c9b5090e2 Initial load
duke
parents:
diff changeset
   795
      // that we return the same result we did for the other thread, i.e. the
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   796
      // successfully loaded InstanceKlass
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   797
      // Should not get here for classloaders that support parallelism
4445
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
   798
      // with the new cleaner mechanism, even with AllowParallelDefineClass
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
   799
      // Bootstrap goes through here to allow for an extra guarantee check
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   800
      if (UnsyncloadClass || (class_loader.is_null())) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   801
        if (k.is_null() && HAS_PENDING_EXCEPTION
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
   802
          && PENDING_EXCEPTION->is_a(SystemDictionary::LinkageError_klass())) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   803
          MutexLocker mu(SystemDictionary_lock, THREAD);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   804
          Klass* check = find_class(d_index, d_hash, name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   805
          if (check != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   806
            // Klass is already loaded, so just use it
489c9b5090e2 Initial load
duke
parents:
diff changeset
   807
            k = instanceKlassHandle(THREAD, check);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   808
            CLEAR_PENDING_EXCEPTION;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   809
            guarantee((!class_loader.is_null()), "dup definition for bootstrap loader?");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   810
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   811
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   812
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   813
489c9b5090e2 Initial load
duke
parents:
diff changeset
   814
      // If everything was OK (no exceptions, no null return value), and
489c9b5090e2 Initial load
duke
parents:
diff changeset
   815
      // class_loader is NOT the defining loader, do a little more bookkeeping.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   816
      if (!HAS_PENDING_EXCEPTION && !k.is_null() &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
   817
        k->class_loader() != class_loader()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   818
489c9b5090e2 Initial load
duke
parents:
diff changeset
   819
        check_constraints(d_index, d_hash, k, class_loader, false, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   820
489c9b5090e2 Initial load
duke
parents:
diff changeset
   821
        // Need to check for a PENDING_EXCEPTION again; check_constraints
489c9b5090e2 Initial load
duke
parents:
diff changeset
   822
        // can throw and doesn't use the CHECK macro.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   823
        if (!HAS_PENDING_EXCEPTION) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   824
          { // Grabbing the Compile_lock prevents systemDictionary updates
489c9b5090e2 Initial load
duke
parents:
diff changeset
   825
            // during compilations.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   826
            MutexLocker mu(Compile_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   827
            update_dictionary(d_index, d_hash, p_index, p_hash,
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
   828
                              k, class_loader, THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   829
          }
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
   830
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   831
          if (JvmtiExport::should_post_class_load()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   832
            Thread *thread = THREAD;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   833
            assert(thread->is_Java_thread(), "thread->is_Java_thread()");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   834
            JvmtiExport::post_class_load((JavaThread *) thread, k());
489c9b5090e2 Initial load
duke
parents:
diff changeset
   835
          }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   836
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   837
      }
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   838
    } // load_instance_class loop
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   839
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   840
    if (load_instance_added == true) {
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   841
      // clean up placeholder entries for LOAD_INSTANCE success or error
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   842
      // This brackets the SystemDictionary updates for both defining
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   843
      // and initiating loaders
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   844
      MutexLocker mu(SystemDictionary_lock, THREAD);
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
   845
      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
   846
      SystemDictionary_lock->notify_all();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   847
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   848
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   849
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   850
  if (HAS_PENDING_EXCEPTION || k.is_null()) {
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   851
    return NULL;
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   852
  }
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   853
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
   854
  post_class_load_event(class_load_start_time, k, class_loader);
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
   855
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   856
#ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   857
  {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   858
    ClassLoaderData* loader_data = k->class_loader_data();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   859
    MutexLocker mu(SystemDictionary_lock, THREAD);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   860
    Klass* kk = find_class(name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   861
    assert(kk == k(), "should be present in dictionary");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   862
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   863
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   864
489c9b5090e2 Initial load
duke
parents:
diff changeset
   865
  // return if the protection domain in NULL
489c9b5090e2 Initial load
duke
parents:
diff changeset
   866
  if (protection_domain() == NULL) return k();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   867
489c9b5090e2 Initial load
duke
parents:
diff changeset
   868
  // Check the protection domain has the right access
489c9b5090e2 Initial load
duke
parents:
diff changeset
   869
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   870
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   871
    // Note that we have an entry, and entries can be deleted only during GC,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   872
    // so we cannot allow GC to occur while we're holding this entry.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   873
    // We're using a No_Safepoint_Verifier to catch any place where we
489c9b5090e2 Initial load
duke
parents:
diff changeset
   874
    // might potentially do a GC at all.
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   875
    // Dictionary::do_unloading() asserts that classes in SD are only
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   876
    // unloaded at a safepoint. Anonymous classes are not in SD.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   877
    No_Safepoint_Verifier nosafepoint;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   878
    if (dictionary()->is_valid_protection_domain(d_index, d_hash, name,
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   879
                                                 loader_data,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   880
                                                 protection_domain)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   881
      return k();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   882
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   883
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   884
489c9b5090e2 Initial load
duke
parents:
diff changeset
   885
  // 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
   886
  validate_protection_domain(k, class_loader, protection_domain, CHECK_NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   887
489c9b5090e2 Initial load
duke
parents:
diff changeset
   888
  return k();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   889
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   890
489c9b5090e2 Initial load
duke
parents:
diff changeset
   891
489c9b5090e2 Initial load
duke
parents:
diff changeset
   892
// This routine does not lock the system dictionary.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   893
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   894
// Since readers don't hold a lock, we must make sure that system
489c9b5090e2 Initial load
duke
parents:
diff changeset
   895
// dictionary entries are only removed at a safepoint (when only one
489c9b5090e2 Initial load
duke
parents:
diff changeset
   896
// thread is running), and are added to in a safe way (all links must
489c9b5090e2 Initial load
duke
parents:
diff changeset
   897
// be updated in an MT-safe manner).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   898
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   899
// Callers should be aware that an entry could be added just after
489c9b5090e2 Initial load
duke
parents:
diff changeset
   900
// _dictionary->bucket(index) is read here, so the caller will not see
489c9b5090e2 Initial load
duke
parents:
diff changeset
   901
// the new entry.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   902
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   903
Klass* SystemDictionary::find(Symbol* class_name,
15847
f9ce2cd20dee 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents: 15432
diff changeset
   904
                              Handle class_loader,
f9ce2cd20dee 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents: 15432
diff changeset
   905
                              Handle protection_domain,
f9ce2cd20dee 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents: 15432
diff changeset
   906
                              TRAPS) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   907
2020
68d27ca96f33 6790209: server VM fails with assert(will_link,"_new: typeflow responsibility")
kvn
parents: 1550
diff changeset
   908
  // 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
   909
  // 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
   910
  // 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
   911
  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
   912
  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
   913
f9ce2cd20dee 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents: 15432
diff changeset
   914
  if (loader_data == NULL) {
f9ce2cd20dee 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents: 15432
diff changeset
   915
    // If the ClassLoaderData has not been setup,
f9ce2cd20dee 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents: 15432
diff changeset
   916
    // 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
   917
    return NULL;
f9ce2cd20dee 8008549: NPG: SystemDictionary::find(...) unnecessarily keeps class loaders alive
stefank
parents: 15432
diff changeset
   918
  }
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   919
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   920
  unsigned int d_hash = dictionary()->compute_hash(class_name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   921
  int d_index = dictionary()->hash_to_index(d_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   922
489c9b5090e2 Initial load
duke
parents:
diff changeset
   923
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   924
    // Note that we have an entry, and entries can be deleted only during GC,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   925
    // so we cannot allow GC to occur while we're holding this entry.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   926
    // We're using a No_Safepoint_Verifier to catch any place where we
489c9b5090e2 Initial load
duke
parents:
diff changeset
   927
    // might potentially do a GC at all.
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   928
    // Dictionary::do_unloading() asserts that classes in SD are only
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
   929
    // unloaded at a safepoint. Anonymous classes are not in SD.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   930
    No_Safepoint_Verifier nosafepoint;
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   931
    return dictionary()->find(d_index, d_hash, class_name, loader_data,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   932
                              protection_domain, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   933
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   934
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   935
489c9b5090e2 Initial load
duke
parents:
diff changeset
   936
489c9b5090e2 Initial load
duke
parents:
diff changeset
   937
// Look for a loaded instance or array klass by name.  Do not do any loading.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   938
// return NULL in case of error.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   939
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
   940
                                                      Handle class_loader,
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
   941
                                                      Handle protection_domain,
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
   942
                                                      TRAPS) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   943
  Klass* k = NULL;
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   944
  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
   945
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   946
  if (FieldType::is_array(class_name)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   947
    // 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
   948
    // 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
   949
    // side-effect of this call
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   950
    FieldArrayInfo fd;
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   951
    BasicType t = FieldType::get_array_info(class_name, fd, CHECK_(NULL));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   952
    if (t != T_OBJECT) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   953
      k = Universe::typeArrayKlassObj(t);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   954
    } else {
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   955
      k = SystemDictionary::find(fd.object_key(), class_loader, protection_domain, THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   956
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   957
    if (k != NULL) {
14488
ab48109f7d1b 8001471: Klass::cast() does nothing
hseigel
parents: 14077
diff changeset
   958
      k = k->array_klass_or_null(fd.dimension());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   959
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   960
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   961
    k = find(class_name, class_loader, protection_domain, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   962
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   963
  return k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   964
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   965
489c9b5090e2 Initial load
duke
parents:
diff changeset
   966
// Note: this method is much like resolve_from_stream, but
489c9b5090e2 Initial load
duke
parents:
diff changeset
   967
// updates no supplemental data structures.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   968
// TODO consolidate the two methods with a helper routine?
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
   969
Klass* SystemDictionary::parse_stream(Symbol* class_name,
13952
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
   970
                                      Handle class_loader,
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
   971
                                      Handle protection_domain,
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
   972
                                      ClassFileStream* st,
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
   973
                                      KlassHandle host_klass,
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
   974
                                      GrowableArray<Handle>* cp_patches,
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
   975
                                      TRAPS) {
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
   976
  TempNewSymbol parsed_name = NULL;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   977
21767
41eaa9a17059 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents: 21103
diff changeset
   978
  Ticks class_load_start_time = Ticks::now();
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
   979
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
   980
  ClassLoaderData* loader_data;
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
   981
  if (host_klass.not_null()) {
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
   982
    // Create a new CLD for anonymous class, that uses the same class loader
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
   983
    // as the host_klass
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
   984
    guarantee(host_klass->class_loader() == class_loader(), "should be the same");
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
   985
    guarantee(!DumpSharedSpaces, "must not create anonymous classes when dumping");
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
   986
    loader_data = ClassLoaderData::anonymous_class_loader_data(class_loader(), CHECK_NULL);
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
   987
    loader_data->record_dependency(host_klass(), CHECK_NULL);
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
   988
  } else {
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
   989
    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
   990
  }
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
   991
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   992
  // Parse the stream. Note that we do this even though this klass might
489c9b5090e2 Initial load
duke
parents:
diff changeset
   993
  // already be present in the SystemDictionary, otherwise we would not
489c9b5090e2 Initial load
duke
parents:
diff changeset
   994
  // throw potential ClassFormatErrors.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   995
  //
489c9b5090e2 Initial load
duke
parents:
diff changeset
   996
  // Note: "name" is updated.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   997
489c9b5090e2 Initial load
duke
parents:
diff changeset
   998
  instanceKlassHandle k = ClassFileParser(st).parseClassFile(class_name,
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
   999
                                                             loader_data,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1000
                                                             protection_domain,
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1001
                                                             host_klass,
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1002
                                                             cp_patches,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1003
                                                             parsed_name,
3820
0a8fbbe180db 6830542: Performance: JVM_DefineClass already verified.
acorn
parents: 3575
diff changeset
  1004
                                                             true,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1005
                                                             THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1006
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1007
1550
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1008
  if (host_klass.not_null() && k.not_null()) {
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1009
    // If it's anonymous, initialize it now, since nobody else will.
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1010
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1011
    {
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1012
      MutexLocker mu_r(Compile_lock, THREAD);
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1013
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1014
      // 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
  1015
      // deoptimizations.
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1016
      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
  1017
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1018
      // But, do not add to system dictionary.
22231
1cca24bb3125 8029383: assert(counter_changed) failed: failed dependencies, but counter didn't change
roland
parents: 21767
diff changeset
  1019
1cca24bb3125 8029383: assert(counter_changed) failed: failed dependencies, but counter didn't change
roland
parents: 21767
diff changeset
  1020
      // 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
  1021
      notice_modification();
1550
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1022
    }
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1023
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1024
    // 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
  1025
    k->link_class(CHECK_NULL);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1026
    if (cp_patches != NULL) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1027
      k->constants()->patch_resolved_references(cp_patches);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1028
    }
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  1029
    k->eager_initialize(CHECK_NULL);
1550
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1030
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1031
    // notify jvmti
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1032
    if (JvmtiExport::should_post_class_load()) {
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1033
        assert(THREAD->is_Java_thread(), "thread->is_Java_thread()");
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1034
        JvmtiExport::post_class_load((JavaThread *) THREAD, k());
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1035
    }
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  1036
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  1037
    post_class_load_event(class_load_start_time, k, class_loader);
1550
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1038
  }
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1039
  assert(host_klass.not_null() || cp_patches == NULL,
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1040
         "cp_patches only found with host_klass");
1550
be2fc37a817f 6653858: dynamic languages need to be able to load anonymous classes
jrose
parents: 670
diff changeset
  1041
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1042
  return k();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1043
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1044
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1045
// Add a klass to the system from a stream (called by jni_DefineClass and
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1046
// JVM_DefineClass).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1047
// Note: class_name can be NULL. In that case we do not know the name of
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1048
// the class until we have parsed the stream.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1049
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1050
Klass* SystemDictionary::resolve_from_stream(Symbol* class_name,
13952
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
  1051
                                             Handle class_loader,
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
  1052
                                             Handle protection_domain,
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
  1053
                                             ClassFileStream* st,
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
  1054
                                             bool verify,
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
  1055
                                             TRAPS) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1056
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1057
  // Classloaders that support parallelism, e.g. bootstrap classloader,
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1058
  // or all classloaders with UnsyncloadClass do not acquire lock here
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1059
  bool DoObjectLock = true;
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1060
  if (is_parallelCapable(class_loader)) {
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1061
    DoObjectLock = false;
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1062
  }
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1063
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  1064
  ClassLoaderData* loader_data = register_loader(class_loader, CHECK_NULL);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1065
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1066
  // Make sure we are synchronized on the class loader before we proceed
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1067
  Handle lockObject = compute_loader_lock_object(class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1068
  check_loader_lock_contention(lockObject, THREAD);
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1069
  ObjectLocker ol(lockObject, THREAD, DoObjectLock);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1070
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1071
  TempNewSymbol parsed_name = NULL;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1072
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1073
  // Parse the stream. Note that we do this even though this klass might
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1074
  // already be present in the SystemDictionary, otherwise we would not
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1075
  // throw potential ClassFormatErrors.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1076
  //
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1077
  // Note: "name" is updated.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1078
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1079
  instanceKlassHandle k = ClassFileParser(st).parseClassFile(class_name,
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  1080
                                                             loader_data,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1081
                                                             protection_domain,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1082
                                                             parsed_name,
3820
0a8fbbe180db 6830542: Performance: JVM_DefineClass already verified.
acorn
parents: 3575
diff changeset
  1083
                                                             verify,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1084
                                                             THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1085
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1086
  const char* pkg = "java/";
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1087
  if (!HAS_PENDING_EXCEPTION &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1088
      !class_loader.is_null() &&
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1089
      parsed_name != NULL &&
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1090
      !strncmp((const char*)parsed_name->bytes(), pkg, strlen(pkg))) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1091
    // It is illegal to define classes in the "java." package from
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1092
    // JVM_DefineClass or jni_DefineClass unless you're the bootclassloader
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1093
    ResourceMark rm(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1094
    char* name = parsed_name->as_C_string();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1095
    char* index = strrchr(name, '/');
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1096
    *index = '\0'; // chop to just the package name
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1097
    while ((index = strchr(name, '/')) != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1098
      *index = '.'; // replace '/' with '.' in package name
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1099
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1100
    const char* fmt = "Prohibited package name: %s";
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1101
    size_t len = strlen(fmt) + strlen(name);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1102
    char* message = NEW_RESOURCE_ARRAY(char, len);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1103
    jio_snprintf(message, len, fmt, name);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1104
    Exceptions::_throw_msg(THREAD_AND_LOCATION,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1105
      vmSymbols::java_lang_SecurityException(), message);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1106
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1107
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1108
  if (!HAS_PENDING_EXCEPTION) {
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1109
    assert(parsed_name != NULL, "Sanity");
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1110
    assert(class_name == NULL || class_name == parsed_name, "name mismatch");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1111
    // Verification prevents us from creating names with dots in them, this
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1112
    // asserts that that's the case.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1113
    assert(is_internal_format(parsed_name),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1114
           "external class name format used internally");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1115
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1116
    // Add class just loaded
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1117
    // If a class loader supports parallel classloading handle parallel define requests
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1118
    // find_or_define_instance_class may return a different InstanceKlass
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1119
    if (is_parallelCapable(class_loader)) {
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1120
      k = find_or_define_instance_class(class_name, class_loader, k, THREAD);
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1121
    } else {
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1122
      define_instance_class(k, THREAD);
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1123
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1124
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1125
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
  1126
  // Make sure we have an entry in the SystemDictionary on success
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1127
  debug_only( {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1128
    if (!HAS_PENDING_EXCEPTION) {
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1129
      assert(parsed_name != NULL, "parsed_name is still null?");
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1130
      Symbol*  h_name    = k->name();
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1131
      ClassLoaderData *defining_loader_data = k->class_loader_data();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1132
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1133
      MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1134
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1135
      Klass* check = find_class(parsed_name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1136
      assert(check == k(), "should be present in the dictionary");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1137
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1138
      Klass* check2 = find_class(h_name, defining_loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1139
      assert(check == check2, "name inconsistancy in SystemDictionary");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1140
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1141
  } );
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1142
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1143
  return k();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1144
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1145
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1146
#if INCLUDE_CDS
13195
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 12772
diff changeset
  1147
void SystemDictionary::set_shared_dictionary(HashtableBucket<mtClass>* t, int length,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1148
                                             int number_of_entries) {
13195
be27e1b6a4b9 6995781: Native Memory Tracking (Phase 1)
zgu
parents: 12772
diff changeset
  1149
  assert(length == _nof_buckets * sizeof(HashtableBucket<mtClass>),
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1150
         "bad shared dictionary size.");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1151
  _shared_dictionary = new Dictionary(_nof_buckets, t, number_of_entries);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1152
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1153
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1154
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1155
// If there is a shared dictionary, then find the entry for the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1156
// given shared system class, if any.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1157
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1158
Klass* SystemDictionary::find_shared_class(Symbol* class_name) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1159
  if (shared_dictionary() != NULL) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1160
    unsigned int d_hash = shared_dictionary()->compute_hash(class_name, NULL);
11628
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1161
    int d_index = shared_dictionary()->hash_to_index(d_hash);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1162
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1163
    return shared_dictionary()->find_shared_class(d_index, d_hash, class_name);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1164
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1165
    return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1166
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1167
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1168
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1169
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1170
// Load a class from the shared spaces (found through the shared system
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1171
// dictionary).  Force the superclass and all interfaces to be loaded.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1172
// Update the class definition to include sibling classes and no
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1173
// subclasses (yet).  [Classes in the shared space are not part of the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1174
// object hierarchy until loaded.]
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1175
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1176
instanceKlassHandle SystemDictionary::load_shared_class(
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1177
                 Symbol* class_name, Handle class_loader, TRAPS) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1178
  instanceKlassHandle ik (THREAD, find_shared_class(class_name));
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1179
  // Make sure we only return the boot class for the NULL classloader.
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1180
  if (ik.not_null() &&
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1181
      SharedClassUtil::is_shared_boot_class(ik()) && class_loader.is_null()) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1182
    Handle protection_domain;
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1183
    return load_shared_class(ik, class_loader, protection_domain, THREAD);
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1184
  }
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1185
  return instanceKlassHandle();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1186
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1187
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1188
instanceKlassHandle SystemDictionary::load_shared_class(instanceKlassHandle ik,
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1189
                                                        Handle class_loader,
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1190
                                                        Handle protection_domain, TRAPS) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1191
  if (ik.not_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1192
    instanceKlassHandle nh = instanceKlassHandle(); // null Handle
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1193
    Symbol* class_name = ik->name();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1194
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1195
    // Found the class, now load the superclass and interfaces.  If they
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1196
    // are shared, add them to the main system dictionary and reset
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1197
    // their hierarchy references (supers, subs, and interfaces).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1198
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1199
    if (ik->super() != NULL) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1200
      Symbol*  cn = ik->super()->name();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1201
      resolve_super_or_fail(class_name, cn,
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1202
                            class_loader, protection_domain, true, CHECK_(nh));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1203
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1204
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1205
    Array<Klass*>* interfaces = ik->local_interfaces();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1206
    int num_interfaces = interfaces->length();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1207
    for (int index = 0; index < num_interfaces; index++) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1208
      Klass* k = interfaces->at(index);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1209
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1210
      // Note: can not use InstanceKlass::cast here because
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1211
      // interfaces' InstanceKlass's C++ vtbls haven't been
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1212
      // reinitialized yet (they will be once the interface classes
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1213
      // are loaded)
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1214
      Symbol*  name  = k->name();
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1215
      resolve_super_or_fail(class_name, name, class_loader, protection_domain, false, CHECK_(nh));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1216
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1217
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1218
    // Adjust methods to recover missing data.  They need addresses for
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1219
    // interpreter entry points and their default native method address
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1220
    // must be reset.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1221
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1222
    // Updating methods must be done under a lock so multiple
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1223
    // threads don't update these in parallel
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1224
    //
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1225
    // 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
  1226
    // 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
  1227
    // on a custom class loader lock.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1228
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1229
    ClassLoaderData* loader_data = ClassLoaderData::class_loader_data(class_loader());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1230
    {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1231
      Handle lockObject = compute_loader_lock_object(class_loader, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1232
      check_loader_lock_contention(lockObject, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1233
      ObjectLocker ol(lockObject, THREAD, true);
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1234
      ik->restore_unshareable_info(loader_data, protection_domain, CHECK_(nh));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1235
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1236
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1237
    if (TraceClassLoading) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1238
      ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1239
      tty->print("[Loaded %s", ik->external_name());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1240
      tty->print(" from shared objects file");
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1241
      if (class_loader.not_null()) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1242
        tty->print(" by %s", loader_data->loader_name());
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1243
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1244
      tty->print_cr("]");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1245
    }
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1246
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1247
    if (DumpLoadedClassList != NULL && classlist_file->is_open()) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1248
      // 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
  1249
      if (SystemDictionaryShared::is_sharing_possible(loader_data)) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1250
        ResourceMark rm(THREAD);
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1251
        classlist_file->print_cr("%s", ik->name()->as_C_string());
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1252
        classlist_file->flush();
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1253
      }
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1254
    }
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1255
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1256
    // notify a class loaded from shared object
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1257
    ClassLoadingService::notify_class_loaded(InstanceKlass::cast(ik()),
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1258
                                             true /* shared class */);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1259
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1260
  return ik;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1261
}
26419
25abc4a3285c 8056971: Minor class loading clean-up
iklam
parents: 26181
diff changeset
  1262
#endif // INCLUDE_CDS
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1263
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1264
instanceKlassHandle SystemDictionary::load_instance_class(Symbol* class_name, Handle class_loader, TRAPS) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1265
  instanceKlassHandle nh = instanceKlassHandle(); // null Handle
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1266
  if (class_loader.is_null()) {
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1267
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1268
    // Search the shared system dictionary for classes preloaded into the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1269
    // shared spaces.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1270
    instanceKlassHandle k;
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1271
    {
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1272
#if INCLUDE_CDS
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1273
      PerfTraceTime vmtimer(ClassLoader::perf_shared_classload_time());
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1274
      k = load_shared_class(class_name, class_loader, THREAD);
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1275
#endif
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1276
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1277
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1278
    if (k.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1279
      // Use VM class loader
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1280
      PerfTraceTime vmtimer(ClassLoader::perf_sys_classload_time());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1281
      k = ClassLoader::load_classfile(class_name, CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1282
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1283
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1284
    // find_or_define_instance_class may return a different InstanceKlass
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1285
    if (!k.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1286
      k = find_or_define_instance_class(class_name, class_loader, k, CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1287
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1288
    return k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1289
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1290
    // Use user specified class loader to load class. Call loadClass operation on class_loader.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1291
    ResourceMark rm(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1292
3575
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1293
    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
  1294
    JavaThread* jt = (JavaThread*) THREAD;
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1295
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1296
    PerfClassTraceTime vmtimer(ClassLoader::perf_app_classload_time(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1297
                               ClassLoader::perf_app_classload_selftime(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1298
                               ClassLoader::perf_app_classload_count(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1299
                               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
  1300
                               jt->get_thread_stat()->perf_timers_addr(),
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1301
                               PerfClassTraceTime::CLASS_LOAD);
224791e7ecab 6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents: 2570
diff changeset
  1302
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1303
    Handle s = java_lang_String::create_from_symbol(class_name, CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1304
    // Translate to external class name format, i.e., convert '/' chars to '.'
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1305
    Handle string = java_lang_String::externalize_classname(s, CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1306
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1307
    JavaValue result(T_OBJECT);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1308
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  1309
    KlassHandle spec_klass (THREAD, SystemDictionary::ClassLoader_klass());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1310
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1311
    // Call public unsynchronized loadClass(String) directly for all class loaders
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1312
    // for parallelCapable class loaders. JDK >=7, loadClass(String, boolean) will
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1313
    // acquire a class-name based lock rather than the class loader object lock.
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1314
    // JDK < 7 already acquire the class loader lock in loadClass(String, boolean),
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1315
    // so the call to loadClassInternal() was not required.
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1316
    //
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1317
    // UnsyncloadClass flag means both call loadClass(String) and do
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1318
    // not acquire the class loader lock even for class loaders that are
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1319
    // not parallelCapable. This was a risky transitional
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1320
    // flag for diagnostic purposes only. It is risky to call
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1321
    // custom class loaders without synchronization.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1322
    // WARNING If a custom class loader does NOT synchronizer findClass, or callers of
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1323
    // findClass, the UnsyncloadClass flag risks unexpected timing bugs in the field.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1324
    // Do NOT assume this will be supported in future releases.
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1325
    //
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1326
    // Added MustCallLoadClassInternal in case we discover in the field
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1327
    // a customer that counts on this call
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1328
    if (MustCallLoadClassInternal && has_loadClassInternal()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1329
      JavaCalls::call_special(&result,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1330
                              class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1331
                              spec_klass,
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1332
                              vmSymbols::loadClassInternal_name(),
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1333
                              vmSymbols::string_class_signature(),
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1334
                              string,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1335
                              CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1336
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1337
      JavaCalls::call_virtual(&result,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1338
                              class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1339
                              spec_klass,
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1340
                              vmSymbols::loadClass_name(),
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1341
                              vmSymbols::string_class_signature(),
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1342
                              string,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1343
                              CHECK_(nh));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1344
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1345
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1346
    assert(result.get_type() == T_OBJECT, "just checking");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1347
    oop obj = (oop) result.get_jobject();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1348
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1349
    // Primitive classes return null since forName() can not be
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1350
    // used to obtain any of the Class objects representing primitives or void
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1351
    if ((obj != NULL) && !(java_lang_Class::is_primitive(obj))) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1352
      instanceKlassHandle k =
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1353
                instanceKlassHandle(THREAD, java_lang_Class::as_Klass(obj));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1354
      // For user defined Java class loaders, check that the name returned is
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1355
      // the same as that requested.  This check is done for the bootstrap
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1356
      // loader when parsing the class file.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1357
      if (class_name == k->name()) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1358
        return k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1359
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1360
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1361
    // Class is not found or has the wrong name, return NULL
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1362
    return nh;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1363
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1364
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1365
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1366
void SystemDictionary::define_instance_class(instanceKlassHandle k, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1367
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1368
  ClassLoaderData* loader_data = k->class_loader_data();
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1369
  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
  1370
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1371
 // for bootstrap and other parallel classloaders don't acquire lock,
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1372
 // use placeholder token
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1373
 // If a parallelCapable class loader calls define_instance_class instead of
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1374
 // find_or_define_instance_class to get here, we have a timing
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1375
 // hole with systemDictionary updates and check_constraints
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1376
 if (!class_loader_h.is_null() && !is_parallelCapable(class_loader_h)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1377
    assert(ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1378
         compute_loader_lock_object(class_loader_h, THREAD)),
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1379
         "define called without lock");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1380
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1381
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1382
  // Check class-loading constraints. Throw exception if violation is detected.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1383
  // Grabs and releases SystemDictionary_lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1384
  // The check_constraints/find_class call and update_dictionary sequence
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1385
  // must be "atomic" for a specific class/classloader pair so we never
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1386
  // define two different instanceKlasses for that class/classloader pair.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1387
  // Existing classloaders will call define_instance_class with the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1388
  // classloader lock held
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1389
  // Parallel classloaders will call find_or_define_instance_class
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1390
  // 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
  1391
  Symbol*  name_h = k->name();
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1392
  unsigned int d_hash = dictionary()->compute_hash(name_h, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1393
  int d_index = dictionary()->hash_to_index(d_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1394
  check_constraints(d_index, d_hash, k, class_loader_h, true, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1395
13753
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1396
  // 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
  1397
  // 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
  1398
  // 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
  1399
  // 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
  1400
  // 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
  1401
  if (k->class_loader() != NULL) {
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1402
    methodHandle m(THREAD, Universe::loader_addClass_method());
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1403
    JavaValue result(T_VOID);
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1404
    JavaCallArguments args(class_loader_h);
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1405
    args.push_oop(Handle(THREAD, k->java_mirror()));
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1406
    JavaCalls::call(&result, m, &args, CHECK);
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1407
  }
1df4fd11c5b8 7197269: NPG: FollowReferences has no ClassLoader -> Class link to follow
coleenp
parents: 13738
diff changeset
  1408
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1409
  // Add the new class. We need recompile lock during update of CHA.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1410
  {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1411
    unsigned int p_hash = placeholders()->compute_hash(name_h, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1412
    int p_index = placeholders()->hash_to_index(p_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1413
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1414
    MutexLocker mu_r(Compile_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1415
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1416
    // Add to class hierarchy, initialize vtables, and do possible
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1417
    // deoptimizations.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1418
    add_to_hierarchy(k, CHECK); // No exception, but can block
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1419
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1420
    // Add to systemDictionary - so other classes can see it.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1421
    // Grabs and releases SystemDictionary_lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1422
    update_dictionary(d_index, d_hash, p_index, p_hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1423
                      k, class_loader_h, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1424
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1425
  k->eager_initialize(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1426
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1427
  // notify jvmti
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1428
  if (JvmtiExport::should_post_class_load()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1429
      assert(THREAD->is_Java_thread(), "thread->is_Java_thread()");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1430
      JvmtiExport::post_class_load((JavaThread *) THREAD, k());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1431
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1432
  }
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  1433
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1434
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1435
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1436
// Support parallel classloading
4445
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
  1437
// All parallel class loaders, including bootstrap classloader
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
  1438
// lock a placeholder entry for this class/class_loader pair
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
  1439
// to allow parallel defines of different classes for this class loader
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1440
// With AllowParallelDefine flag==true, in case they do not synchronize around
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1441
// FindLoadedClass/DefineClass, calls, we check for parallel
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1442
// loading for them, wait if a defineClass is in progress
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1443
// and return the initial requestor's results
4445
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
  1444
// This flag does not apply to the bootstrap classloader.
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1445
// With AllowParallelDefine flag==false, call through to define_instance_class
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1446
// which will throw LinkageError: duplicate class definition.
4445
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
  1447
// False is the requested default.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1448
// For better performance, the class loaders should synchronize
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1449
// findClass(), i.e. FindLoadedClass/DefineClassIfAbsent or they
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1450
// potentially waste time reading and parsing the bytestream.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1451
// Note: VM callers should ensure consistency of k/class_name,class_loader
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1452
instanceKlassHandle SystemDictionary::find_or_define_instance_class(Symbol* class_name, Handle class_loader, instanceKlassHandle k, TRAPS) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1453
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1454
  instanceKlassHandle nh = instanceKlassHandle(); // null Handle
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1455
  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
  1456
  ClassLoaderData* loader_data = class_loader_data(class_loader);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1457
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1458
  unsigned int d_hash = dictionary()->compute_hash(name_h, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1459
  int d_index = dictionary()->hash_to_index(d_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1460
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1461
// Hold SD lock around find_class and placeholder creation for DEFINE_CLASS
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1462
  unsigned int p_hash = placeholders()->compute_hash(name_h, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1463
  int p_index = placeholders()->hash_to_index(p_hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1464
  PlaceholderEntry* probe;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1465
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1466
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1467
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1468
    // First check if class already defined
4445
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
  1469
    if (UnsyncloadClass || (is_parallelDefine(class_loader))) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1470
      Klass* check = find_class(d_index, d_hash, name_h, loader_data);
4445
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
  1471
      if (check != NULL) {
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
  1472
        return(instanceKlassHandle(THREAD, check));
1356c4b003de 6893504: LinkageError for bootstrap duplicate class definitions.
acorn
parents: 4094
diff changeset
  1473
      }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1474
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1475
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1476
    // Acquire define token for this class/classloader
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1477
    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
  1478
    // Wait if another thread defining in parallel
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1479
    // All threads wait - even those that will throw duplicate class: otherwise
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1480
    // caller is surprised by LinkageError: duplicate, but findLoadedClass fails
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1481
    // if other thread has not finished updating dictionary
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1482
    while (probe->definer() != NULL) {
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1483
      SystemDictionary_lock->wait();
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1484
    }
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1485
    // Only special cases allow parallel defines and can use other thread's results
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1486
    // Other cases fall through, and may run into duplicate defines
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1487
    // caught by finding an entry in the SystemDictionary
14488
ab48109f7d1b 8001471: Klass::cast() does nothing
hseigel
parents: 14077
diff changeset
  1488
    if ((UnsyncloadClass || is_parallelDefine(class_loader)) && (probe->instance_klass() != NULL)) {
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
  1489
        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
  1490
        SystemDictionary_lock->notify_all();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1491
#ifdef ASSERT
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1492
        Klass* check = find_class(d_index, d_hash, name_h, loader_data);
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1493
        assert(check != NULL, "definer missed recording success");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1494
#endif
14488
ab48109f7d1b 8001471: Klass::cast() does nothing
hseigel
parents: 14077
diff changeset
  1495
        return(instanceKlassHandle(THREAD, probe->instance_klass()));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1496
    } else {
1890
9ce941df84eb 4670071: loadClassInternal is too restrictive.
acorn
parents: 1550
diff changeset
  1497
      // 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
  1498
      probe->set_definer(THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1499
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1500
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1501
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1502
  define_instance_class(k, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1503
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1504
  Handle linkage_exception = Handle(); // null handle
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1505
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1506
  // definer must notify any waiting threads
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1507
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1508
    MutexLocker mu(SystemDictionary_lock, THREAD);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1509
    PlaceholderEntry* probe = placeholders()->get_entry(p_index, p_hash, name_h, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1510
    assert(probe != NULL, "DEFINE_CLASS placeholder lost?");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1511
    if (probe != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1512
      if (HAS_PENDING_EXCEPTION) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1513
        linkage_exception = Handle(THREAD,PENDING_EXCEPTION);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1514
        CLEAR_PENDING_EXCEPTION;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1515
      } else {
14488
ab48109f7d1b 8001471: Klass::cast() does nothing
hseigel
parents: 14077
diff changeset
  1516
        probe->set_instance_klass(k());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1517
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1518
      probe->set_definer(NULL);
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
  1519
      placeholders()->find_and_remove(p_index, p_hash, name_h, loader_data, PlaceholderTable::DEFINE_CLASS, THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1520
      SystemDictionary_lock->notify_all();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1521
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1522
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1523
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1524
  // Can't throw exception while holding lock due to rank ordering
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1525
  if (linkage_exception() != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1526
    THROW_OOP_(linkage_exception(), nh); // throws exception and returns
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1527
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1528
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1529
  return k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1530
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1531
Handle SystemDictionary::compute_loader_lock_object(Handle class_loader, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1532
  // If class_loader is NULL we synchronize on _system_loader_lock_obj
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1533
  if (class_loader.is_null()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1534
    return Handle(THREAD, _system_loader_lock_obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1535
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1536
    return class_loader;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1537
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1538
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1539
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1540
// This method is added to check how often we have to wait to grab loader
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1541
// lock. The results are being recorded in the performance counters defined in
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1542
// ClassLoader::_sync_systemLoaderLockContentionRate and
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1543
// ClassLoader::_sync_nonSystemLoaderLockConteionRate.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1544
void SystemDictionary::check_loader_lock_contention(Handle loader_lock, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1545
  if (!UsePerfData) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1546
    return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1547
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1548
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1549
  assert(!loader_lock.is_null(), "NULL lock object");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1550
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1551
  if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader_lock)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1552
      == ObjectSynchronizer::owner_other) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1553
    // contention will likely happen, so increment the corresponding
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1554
    // contention counter.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1555
    if (loader_lock() == _system_loader_lock_obj) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1556
      ClassLoader::sync_systemLoaderLockContentionRate()->inc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1557
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1558
      ClassLoader::sync_nonSystemLoaderLockContentionRate()->inc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1559
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1560
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1561
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1562
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1563
// ----------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1564
// Lookup
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1565
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1566
Klass* SystemDictionary::find_class(int index, unsigned int hash,
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1567
                                      Symbol* class_name,
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1568
                                      ClassLoaderData* loader_data) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1569
  assert_locked_or_safepoint(SystemDictionary_lock);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1570
  assert (index == dictionary()->index_for(class_name, loader_data),
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1571
          "incorrect index?");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1572
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1573
  Klass* k = dictionary()->find_class(index, hash, class_name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1574
  return k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1575
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1576
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1577
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1578
// 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
  1579
Symbol* SystemDictionary::find_placeholder(Symbol* class_name,
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1580
                                           ClassLoaderData* loader_data) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1581
  assert_locked_or_safepoint(SystemDictionary_lock);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1582
  unsigned int p_hash = placeholders()->compute_hash(class_name, loader_data);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1583
  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
  1584
  return placeholders()->find_entry(p_index, p_hash, class_name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1585
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1586
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1587
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1588
// Used for assertions and verification only
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1589
Klass* SystemDictionary::find_class(Symbol* class_name, ClassLoaderData* loader_data) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1590
  #ifndef ASSERT
16680
960505df90e7 8011343: Add new flag for verifying the heap during startup
johnc
parents: 16631
diff changeset
  1591
  guarantee(VerifyBeforeGC      ||
960505df90e7 8011343: Add new flag for verifying the heap during startup
johnc
parents: 16631
diff changeset
  1592
            VerifyDuringGC      ||
960505df90e7 8011343: Add new flag for verifying the heap during startup
johnc
parents: 16631
diff changeset
  1593
            VerifyBeforeExit    ||
960505df90e7 8011343: Add new flag for verifying the heap during startup
johnc
parents: 16631
diff changeset
  1594
            VerifyDuringStartup ||
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1595
            VerifyAfterGC, "too expensive");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1596
  #endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1597
  assert_locked_or_safepoint(SystemDictionary_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1598
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1599
  // First look in the loaded class array
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1600
  unsigned int d_hash = dictionary()->compute_hash(class_name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1601
  int d_index = dictionary()->hash_to_index(d_hash);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1602
  return find_class(d_index, d_hash, class_name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1603
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1604
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1605
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1606
// Get the next class in the diictionary.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1607
Klass* SystemDictionary::try_get_next_class() {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1608
  return dictionary()->try_get_next_class();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1609
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1610
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1611
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1612
// ----------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1613
// 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
  1614
// 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
  1615
// before a new class is used.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1616
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1617
void SystemDictionary::add_to_hierarchy(instanceKlassHandle k, TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1618
  assert(k.not_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
  1619
  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
  1620
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1621
  // Link into hierachy. Make sure the vtables are initialized before linking into
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1622
  k->append_to_sibling_list();                    // add to superklass/sibling list
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1623
  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
  1624
  k->set_init_state(InstanceKlass::loaded);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1625
  // Now flush all code that depended on old class hierarchy.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1626
  // Note: must be done *after* linking k into the hierarchy (was bug 12/9/97)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1627
  // Also, first reinitialize vtable because it may have gotten out of synch
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1628
  // 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
  1629
  CodeCache::flush_dependents_on(k);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1630
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1631
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1632
// ----------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1633
// GC support
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1634
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1635
// Following roots during mark-sweep is separated in two phases.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1636
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1637
// The first phase follows preloaded classes and all other system
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1638
// classes, since these will never get unloaded anyway.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1639
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1640
// The second phase removes (unloads) unreachable classes from the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1641
// system dictionary and follows the remaining classes' contents.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1642
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1643
void SystemDictionary::always_strong_oops_do(OopClosure* blk) {
25492
d27050bdfb04 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 25491
diff changeset
  1644
  roots_oops_do(blk, NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1645
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1646
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1647
void SystemDictionary::always_strong_classes_do(KlassClosure* closure) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1648
  // Follow all system classes and temporary placeholders in dictionary
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1649
  dictionary()->always_strong_classes_do(closure);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1650
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1651
  // Placeholders. These represent classes we're actively loading.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1652
  placeholders()->classes_do(closure);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1653
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1654
11628
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1655
// Calculate a "good" systemdictionary size based
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1656
// on predicted or current loaded classes count
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1657
int SystemDictionary::calculate_systemdictionary_size(int classcount) {
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1658
  int newsize = _old_default_sdsize;
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1659
  if ((classcount > 0)  && !DumpSharedSpaces) {
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1660
    int desiredsize = classcount/_average_depth_goal;
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1661
    for (newsize = _primelist[_sdgeneration]; _sdgeneration < _prime_array_size -1;
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1662
         newsize = _primelist[++_sdgeneration]) {
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1663
      if (desiredsize <=  newsize) {
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1664
        break;
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1665
      }
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1666
    }
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1667
  }
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1668
  return newsize;
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1669
}
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  1670
20405
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1671
#ifdef ASSERT
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1672
class VerifySDReachableAndLiveClosure : public OopClosure {
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1673
private:
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1674
  BoolObjectClosure* _is_alive;
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1675
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1676
  template <class T> void do_oop_work(T* p) {
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1677
    oop obj = oopDesc::load_decode_heap_oop(p);
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1678
    guarantee(_is_alive->do_object_b(obj), "Oop in system dictionary must be live");
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1679
  }
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1680
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1681
public:
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1682
  VerifySDReachableAndLiveClosure(BoolObjectClosure* is_alive) : OopClosure(), _is_alive(is_alive) { }
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1683
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1684
  virtual void do_oop(oop* p)       { do_oop_work(p); }
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1685
  virtual void do_oop(narrowOop* p) { do_oop_work(p); }
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1686
};
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1687
#endif
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1688
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
  1689
// 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
  1690
// Note: anonymous classes are not in the SD.
29576
c223b0a9872e 8061205: MetadataOnStackMark only needs to walk code cache during class redefinition
coleenp
parents: 29081
diff changeset
  1691
bool SystemDictionary::do_unloading(BoolObjectClosure* is_alive,
c223b0a9872e 8061205: MetadataOnStackMark only needs to walk code cache during class redefinition
coleenp
parents: 29081
diff changeset
  1692
                                    bool clean_previous_versions) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1693
  // First, mark for unload all ClassLoaderData referencing a dead class loader.
29576
c223b0a9872e 8061205: MetadataOnStackMark only needs to walk code cache during class redefinition
coleenp
parents: 29081
diff changeset
  1694
  bool unloading_occurred = ClassLoaderDataGraph::do_unloading(is_alive,
c223b0a9872e 8061205: MetadataOnStackMark only needs to walk code cache during class redefinition
coleenp
parents: 29081
diff changeset
  1695
                                                               clean_previous_versions);
26174
ca46a107cb78 8054402: "klass->is_loader_alive(_is_alive)) failed: must be alive" for anonymous classes
thartmann
parents: 25492
diff changeset
  1696
  if (unloading_occurred) {
ca46a107cb78 8054402: "klass->is_loader_alive(_is_alive)) failed: must be alive" for anonymous classes
thartmann
parents: 25492
diff changeset
  1697
    dictionary()->do_unloading();
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1698
    constraints()->purge_loader_constraints();
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1699
    resolution_errors()->purge_resolution_errors();
20405
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1700
  }
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1701
  // Oops referenced by the system dictionary may get unreachable independently
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1702
  // of the class loader (eg. cached protection domain oops). So we need to
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1703
  // explicitly unlink them here instead of in Dictionary::do_unloading.
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1704
  dictionary()->unlink(is_alive);
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1705
#ifdef ASSERT
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1706
  VerifySDReachableAndLiveClosure cl(is_alive);
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1707
  dictionary()->oops_do(&cl);
3321f6b16639 8003420: NPG: make new GC root for pd_set
tschatzl
parents: 18025
diff changeset
  1708
#endif
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1709
  return unloading_occurred;
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1710
}
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1711
25492
d27050bdfb04 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 25491
diff changeset
  1712
void SystemDictionary::roots_oops_do(OopClosure* strong, OopClosure* weak) {
d27050bdfb04 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 25491
diff changeset
  1713
  strong->do_oop(&_java_system_loader);
d27050bdfb04 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 25491
diff changeset
  1714
  strong->do_oop(&_system_loader_lock_obj);
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1715
  CDS_ONLY(SystemDictionaryShared::roots_oops_do(strong);)
25492
d27050bdfb04 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 25491
diff changeset
  1716
d27050bdfb04 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 25491
diff changeset
  1717
  // Adjust dictionary
d27050bdfb04 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 25491
diff changeset
  1718
  dictionary()->roots_oops_do(strong, weak);
d27050bdfb04 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 25491
diff changeset
  1719
d27050bdfb04 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 25491
diff changeset
  1720
  // Visit extra methods
d27050bdfb04 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 25491
diff changeset
  1721
  invoke_method_table()->oops_do(strong);
d27050bdfb04 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 25491
diff changeset
  1722
}
d27050bdfb04 8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents: 25491
diff changeset
  1723
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1724
void SystemDictionary::oops_do(OopClosure* f) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1725
  f->do_oop(&_java_system_loader);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1726
  f->do_oop(&_system_loader_lock_obj);
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1727
  CDS_ONLY(SystemDictionaryShared::oops_do(f);)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1728
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1729
  // Adjust dictionary
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1730
  dictionary()->oops_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1731
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1732
  // Visit extra methods
7104
0c8b519af363 6990192: VM crashes in ciTypeFlow::get_block_for()
twisti
parents: 6463
diff changeset
  1733
  invoke_method_table()->oops_do(f);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1734
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1735
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1736
// Extended Class redefinition support.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1737
// If one of these classes is replaced, we need to replace it in these places.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1738
// KlassClosure::do_klass should take the address of a class but we can
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1739
// change that later.
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1740
void SystemDictionary::preloaded_classes_do(KlassClosure* f) {
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1741
  for (int k = (int)FIRST_WKID; k < (int)WKID_LIMIT; k++) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1742
    f->do_klass(_well_known_klasses[k]);
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1743
  }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1744
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1745
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1746
    for (int i = 0; i < T_VOID+1; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1747
      if (_box_klasses[i] != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1748
        assert(i >= T_BOOLEAN, "checking");
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1749
        f->do_klass(_box_klasses[i]);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1750
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1751
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1752
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1753
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1754
  FilteredFieldsMap::classes_do(f);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1755
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1756
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1757
void SystemDictionary::lazily_loaded_classes_do(KlassClosure* f) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1758
  f->do_klass(_abstract_ownable_synchronizer_klass);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1759
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1760
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1761
// Just the classes from defining class loaders
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1762
// Don't iterate over placeholders
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1763
void SystemDictionary::classes_do(void f(Klass*)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1764
  dictionary()->classes_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1765
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1766
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1767
// Added for initialize_itable_for_klass
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1768
//   Just the classes from defining class loaders
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1769
// Don't iterate over placeholders
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1770
void SystemDictionary::classes_do(void f(Klass*, TRAPS), TRAPS) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1771
  dictionary()->classes_do(f, CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1772
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1773
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1774
//   All classes, and their class loaders
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1775
// Don't iterate over placeholders
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1776
void SystemDictionary::classes_do(void f(Klass*, ClassLoaderData*)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1777
  dictionary()->classes_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1778
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1779
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1780
void SystemDictionary::placeholders_do(void f(Symbol*)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1781
  placeholders()->entries_do(f);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1782
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1783
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1784
void SystemDictionary::methods_do(void f(Method*)) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1785
  dictionary()->methods_do(f);
7104
0c8b519af363 6990192: VM crashes in ciTypeFlow::get_block_for()
twisti
parents: 6463
diff changeset
  1786
  invoke_method_table()->methods_do(f);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1787
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1788
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1789
void SystemDictionary::remove_classes_in_error_state() {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1790
  dictionary()->remove_classes_in_error_state();
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1791
}
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  1792
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1793
// ----------------------------------------------------------------------------
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1794
// Lazily load klasses
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1795
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1796
void SystemDictionary::load_abstract_ownable_synchronizer_klass(TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1797
  // if multiple threads calling this function, only one thread will load
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1798
  // the class.  The other threads will find the loaded version once the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1799
  // class is loaded.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1800
  Klass* aos = _abstract_ownable_synchronizer_klass;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1801
  if (aos == NULL) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1802
    Klass* k = resolve_or_fail(vmSymbols::java_util_concurrent_locks_AbstractOwnableSynchronizer(), true, CHECK);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1803
    // Force a fence to prevent any read before the write completes
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1804
    OrderAccess::fence();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1805
    _abstract_ownable_synchronizer_klass = k;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1806
  }
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
// Initialization
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1811
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1812
void SystemDictionary::initialize(TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1813
  // Allocate arrays
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1814
  assert(dictionary() == NULL,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1815
         "SystemDictionary should only be initialized once");
11628
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1816
  _sdgeneration        = 0;
13155c0c00b4 7114376: Make system dictionary hashtable bucket array size configurable
acorn
parents: 11480
diff changeset
  1817
  _dictionary          = new Dictionary(calculate_systemdictionary_size(PredictedLoadedClassCount));
7104
0c8b519af363 6990192: VM crashes in ciTypeFlow::get_block_for()
twisti
parents: 6463
diff changeset
  1818
  _placeholders        = new PlaceholderTable(_nof_buckets);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1819
  _number_of_modifications = 0;
7104
0c8b519af363 6990192: VM crashes in ciTypeFlow::get_block_for()
twisti
parents: 6463
diff changeset
  1820
  _loader_constraints  = new LoaderConstraintTable(_loader_constraint_size);
0c8b519af363 6990192: VM crashes in ciTypeFlow::get_block_for()
twisti
parents: 6463
diff changeset
  1821
  _resolution_errors   = new ResolutionErrorTable(_resolution_error_size);
0c8b519af363 6990192: VM crashes in ciTypeFlow::get_block_for()
twisti
parents: 6463
diff changeset
  1822
  _invoke_method_table = new SymbolPropertyTable(_invoke_method_size);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1823
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1824
  // 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
  1825
  _system_loader_lock_obj = oopFactory::new_intArray(0, CHECK);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1826
  // Initialize basic classes
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1827
  initialize_preloaded_classes(CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1828
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1829
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1830
// 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
  1831
static const short wk_init_info[] = {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1832
  #define WK_KLASS_INIT_INFO(name, symbol, option) \
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1833
    ( ((int)vmSymbols::VM_SYMBOL_ENUM_NAME(symbol) \
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1834
          << SystemDictionary::CEIL_LG_OPTION_LIMIT) \
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1835
      | (int)SystemDictionary::option ),
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1836
  WK_KLASSES_DO(WK_KLASS_INIT_INFO)
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1837
  #undef WK_KLASS_INIT_INFO
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1838
  0
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1839
};
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1840
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1841
bool SystemDictionary::initialize_wk_klass(WKID id, int init_opt, TRAPS) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1842
  assert(id >= (int)FIRST_WKID && id < (int)WKID_LIMIT, "oob");
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1843
  int  info = wk_init_info[id - FIRST_WKID];
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1844
  int  sid  = (info >> CEIL_LG_OPTION_LIMIT);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1845
  Symbol* symbol = vmSymbols::symbol_at((vmSymbols::SID)sid);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1846
  Klass**    klassp = &_well_known_klasses[id];
9116
9bc44be338d6 6981791: remove experimental code for JSR 292
jrose
parents: 8883
diff changeset
  1847
  bool must_load = (init_opt < SystemDictionary::Opt);
15432
9d976ca484d8 8000692: Remove old KERNEL code
zgu
parents: 15188
diff changeset
  1848
  if ((*klassp) == NULL) {
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1849
    if (must_load) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1850
      (*klassp) = resolve_or_fail(symbol, true, CHECK_0); // load required class
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1851
    } else {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1852
      (*klassp) = resolve_or_null(symbol,       CHECK_0); // load optional klass
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1853
    }
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1854
  }
9116
9bc44be338d6 6981791: remove experimental code for JSR 292
jrose
parents: 8883
diff changeset
  1855
  return ((*klassp) != NULL);
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1856
}
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1857
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1858
void SystemDictionary::initialize_wk_klasses_until(WKID limit_id, WKID &start_id, TRAPS) {
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1859
  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
  1860
  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
  1861
    assert(id >= (int)FIRST_WKID && id < (int)WKID_LIMIT, "oob");
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1862
    int info = wk_init_info[id - FIRST_WKID];
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1863
    int sid  = (info >> CEIL_LG_OPTION_LIMIT);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1864
    int opt  = (info & right_n_bits(CEIL_LG_OPTION_LIMIT));
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1865
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1866
    initialize_wk_klass((WKID)id, opt, CHECK);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1867
  }
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1868
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1869
  // move the starting value forward to the limit:
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  1870
  start_id = limit_id;
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1871
}
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1872
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1873
void SystemDictionary::initialize_preloaded_classes(TRAPS) {
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  1874
  assert(WK_KLASS(Object_klass) == NULL, "preloaded classes should only be initialized once");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1875
  // Preload commonly used klasses
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1876
  WKID scan = FIRST_WKID;
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1877
  // first do Object, then String, Class
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1878
  if (UseSharedSpaces) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1879
    initialize_wk_klasses_through(WK_KLASS_ENUM_NAME(Object_klass), scan, CHECK);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1880
    // Initialize the constant pool for the Object_class
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1881
    InstanceKlass* ik = InstanceKlass::cast(Object_klass());
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1882
    ik->constants()->restore_unshareable_info(CHECK);
13736
5b15a8f57979 7195867: NPG: SAJDI tests fail with sun.jvm.hotspot.types.WrongTypeException: No suitable match for type
coleenp
parents: 13728
diff changeset
  1883
    initialize_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
  1884
  } else {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1885
    initialize_wk_klasses_through(WK_KLASS_ENUM_NAME(Class_klass), scan, CHECK);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1886
  }
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1887
12623
09fcb0dc71ad 6924259: Remove String.count/String.offset
kvn
parents: 11628
diff changeset
  1888
  // Calculate offsets for String and Class classes since they are loaded and
09fcb0dc71ad 6924259: Remove String.count/String.offset
kvn
parents: 11628
diff changeset
  1889
  // can be used after this point.
09fcb0dc71ad 6924259: Remove String.count/String.offset
kvn
parents: 11628
diff changeset
  1890
  java_lang_String::compute_offsets();
10546
e79347eebbc5 7086585: make Java field injection more flexible
never
parents: 10265
diff changeset
  1891
  java_lang_Class::compute_offsets();
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1892
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1893
  // Fixup mirrors for classes loaded before java.lang.Class.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1894
  // These calls iterate over the objects currently in the perm gen
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1895
  // so calling them at this point is matters (not before when there
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1896
  // are fewer objects and not later after there are more objects
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1897
  // in the perm gen.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1898
  Universe::initialize_basic_type_mirrors(CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1899
  Universe::fixup_mirrors(CHECK);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1900
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1901
  // do a bunch more:
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  1902
  initialize_wk_klasses_through(WK_KLASS_ENUM_NAME(Reference_klass), scan, CHECK);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1903
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1904
  // Preload ref klasses and set reference types
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1905
  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
  1906
  InstanceRefKlass::update_nonstatic_oop_maps(WK_KLASS(Reference_klass));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1907
28510
4f1d3611e0bc 8047125: (ref) More phantom object references
jmasa
parents: 28374
diff changeset
  1908
  initialize_wk_klasses_through(WK_KLASS_ENUM_NAME(Cleaner_klass), scan, CHECK);
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1909
  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
  1910
  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
  1911
  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
  1912
  InstanceKlass::cast(WK_KLASS(PhantomReference_klass))->set_reference_type(REF_PHANTOM);
28510
4f1d3611e0bc 8047125: (ref) More phantom object references
jmasa
parents: 28374
diff changeset
  1913
  InstanceKlass::cast(WK_KLASS(Cleaner_klass))->set_reference_type(REF_CLEANER);
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1914
8883
5569135acca3 6817525: turn on method handle functionality by default for JSR 292
twisti
parents: 8676
diff changeset
  1915
  // JSR 292 classes
5569135acca3 6817525: turn on method handle functionality by default for JSR 292
twisti
parents: 8676
diff changeset
  1916
  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
  1917
  WKID jsr292_group_end   = WK_KLASS_ENUM_NAME(VolatileCallSite_klass);
8883
5569135acca3 6817525: turn on method handle functionality by default for JSR 292
twisti
parents: 8676
diff changeset
  1918
  initialize_wk_klasses_until(jsr292_group_start, scan, CHECK);
24322
c2978d1578e3 8036956: remove EnableInvokeDynamic flag
anoll
parents: 23872
diff changeset
  1919
  initialize_wk_klasses_through(jsr292_group_end, scan, CHECK);
379
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1920
  initialize_wk_klasses_until(WKID_LIMIT, scan, CHECK);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1921
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  1922
  _box_klasses[T_BOOLEAN] = WK_KLASS(Boolean_klass);
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  1923
  _box_klasses[T_CHAR]    = WK_KLASS(Character_klass);
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  1924
  _box_klasses[T_FLOAT]   = WK_KLASS(Float_klass);
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  1925
  _box_klasses[T_DOUBLE]  = WK_KLASS(Double_klass);
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  1926
  _box_klasses[T_BYTE]    = WK_KLASS(Byte_klass);
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  1927
  _box_klasses[T_SHORT]   = WK_KLASS(Short_klass);
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  1928
  _box_klasses[T_INT]     = WK_KLASS(Integer_klass);
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  1929
  _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
  1930
  //_box_klasses[T_OBJECT]  = WK_KLASS(object_klass);
10767ca40189 6652736: well known classes in system dictionary are inefficiently processed
jrose
parents: 195
diff changeset
  1931
  //_box_klasses[T_ARRAY]   = WK_KLASS(object_klass);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1932
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1933
  { // Compute whether we should use loadClass or loadClassInternal when loading classes.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1934
    Method* method = InstanceKlass::cast(ClassLoader_klass())->find_method(vmSymbols::loadClassInternal_name(), vmSymbols::string_class_signature());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1935
    _has_loadClassInternal = (method != NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1936
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1937
  { // 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
  1938
    Method* method = InstanceKlass::cast(ClassLoader_klass())->find_method(vmSymbols::checkPackageAccess_name(), vmSymbols::class_protectiondomain_signature());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1939
    _has_checkPackageAccess = (method != NULL);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1940
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1941
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1942
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1943
// Tells if a given klass is a box (wrapper class, such as java.lang.Integer).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1944
// 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
  1945
BasicType SystemDictionary::box_klass_type(Klass* k) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1946
  assert(k != NULL, "");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1947
  for (int i = T_BOOLEAN; i < T_VOID+1; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1948
    if (_box_klasses[i] == k)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1949
      return (BasicType)i;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1950
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1951
  return T_OBJECT;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1952
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1953
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1954
// Constraints on class loaders. The details of the algorithm can be
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1955
// found in the OOPSLA'98 paper "Dynamic Class Loading in the Java
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1956
// Virtual Machine" by Sheng Liang and Gilad Bracha.  The basic idea is
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1957
// that the system dictionary needs to maintain a set of contraints that
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1958
// must be satisfied by all classes in the dictionary.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1959
// if defining is true, then LinkageError if already in systemDictionary
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1960
// if initiating loader, then ok if InstanceKlass matches existing entry
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1961
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1962
void SystemDictionary::check_constraints(int d_index, unsigned int d_hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1963
                                         instanceKlassHandle k,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1964
                                         Handle class_loader, bool defining,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1965
                                         TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1966
  const char *linkage_error = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1967
  {
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  1968
    Symbol*  name  = k->name();
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1969
    ClassLoaderData *loader_data = class_loader_data(class_loader);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1970
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1971
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1972
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1973
    Klass* check = find_class(d_index, d_hash, name, loader_data);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1974
    if (check != (Klass*)NULL) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1975
      // if different InstanceKlass - duplicate class definition,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1976
      // else - ok, class loaded by a different thread in parallel,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1977
      // we should only have found it if it was done loading and ok to use
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1978
      // system dictionary only holds instance classes, placeholders
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1979
      // also holds array classes
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1980
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1981
      assert(check->oop_is_instance(), "noninstance in systemdictionary");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1982
      if ((defining == true) || (k() != check)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1983
        linkage_error = "loader (instance of  %s): attempted  duplicate class "
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1984
          "definition for name: \"%s\"";
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1985
      } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1986
        return;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1987
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1988
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1989
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1990
#ifdef ASSERT
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  1991
    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
  1992
    assert(ph_check == NULL || ph_check == name, "invalid symbol");
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1993
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1994
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1995
    if (linkage_error == NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1996
      if (constraints()->check_or_update(k, class_loader, name) == false) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1997
        linkage_error = "loader constraint violation: loader (instance of %s)"
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1998
          " previously initiated loading for a different type with name \"%s\"";
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1999
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2000
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2001
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2002
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2003
  // Throw error now if needed (cannot throw while holding
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2004
  // SystemDictionary_lock because of rank ordering)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2005
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2006
  if (linkage_error) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2007
    ResourceMark rm(THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2008
    const char* class_loader_name = loader_name(class_loader());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2009
    char* type_name = k->name()->as_C_string();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2010
    size_t buflen = strlen(linkage_error) + strlen(class_loader_name) +
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2011
      strlen(type_name);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2012
    char* buf = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, buflen);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2013
    jio_snprintf(buf, buflen, linkage_error, class_loader_name, type_name);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2014
    THROW_MSG(vmSymbols::java_lang_LinkageError(), buf);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2015
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2016
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2017
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2018
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2019
// Update system dictionary - done after check_constraint and add_to_hierachy
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2020
// have been called.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2021
void SystemDictionary::update_dictionary(int d_index, unsigned int d_hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2022
                                         int p_index, unsigned int p_hash,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2023
                                         instanceKlassHandle k,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2024
                                         Handle class_loader,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2025
                                         TRAPS) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2026
  // Compile_lock prevents systemDictionary updates during compilations
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2027
  assert_locked_or_safepoint(Compile_lock);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2028
  Symbol*  name  = k->name();
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2029
  ClassLoaderData *loader_data = class_loader_data(class_loader);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2030
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2031
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2032
  MutexLocker mu1(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2033
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2034
  // See whether biased locking is enabled and if so set it for this
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2035
  // klass.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2036
  // Note that this must be done past the last potential blocking
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2037
  // point / safepoint. We enable biased locking lazily using a
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2038
  // VM_Operation to iterate the SystemDictionary and installing the
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2039
  // biasable mark word into each InstanceKlass's prototype header.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2040
  // To avoid race conditions where we accidentally miss enabling the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2041
  // optimization for one class in the process of being added to the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2042
  // dictionary, we must not safepoint after the test of
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2043
  // BiasedLocking::enabled().
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2044
  if (UseBiasedLocking && BiasedLocking::enabled()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2045
    // Set biased locking bit for all loaded classes; it will be
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2046
    // cleared if revocation occurs too often for this type
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2047
    // NOTE that we must only do this when the class is initally
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2048
    // defined, not each time it is referenced from a new class loader
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2049
    if (k->class_loader() == class_loader()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2050
      k->set_prototype_header(markOopDesc::biased_locking_prototype());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2051
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2052
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2053
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
  2054
  // Make a new system dictionary entry.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2055
  Klass* sd_check = find_class(d_index, d_hash, name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2056
  if (sd_check == NULL) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2057
    dictionary()->add_klass(name, loader_data, k);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2058
    notice_modification();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2059
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2060
#ifdef ASSERT
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2061
  sd_check = find_class(d_index, d_hash, name, loader_data);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2062
  assert (sd_check != NULL, "should have entry in system dictionary");
15188
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
  2063
  // Note: there may be a placeholder entry: for circularity testing
3916ac601e04 7199207: NPG: Crash in PlaceholderTable::verify after StackOverflow
acorn
parents: 14588
diff changeset
  2064
  // or for parallel defines
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2065
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2066
    SystemDictionary_lock->notify_all();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2067
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2068
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2069
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2070
8314
057b1c20fd7e 6354181: nsk.logging.stress.threads.scmhml001 fails assertion in "src/share/vm/oops/instanceKlass.cpp, 111"
never
parents: 8076
diff changeset
  2071
// 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
  2072
// 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
  2073
// yet and these will be ignored.
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2074
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
  2075
                    Symbol* class_name, Handle class_loader, TRAPS) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2076
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2077
  // First see if it has been loaded directly.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2078
  // Force the protection domain to be null.  (This removes protection checks.)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2079
  Handle no_protection_domain;
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2080
  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
  2081
                                              no_protection_domain, CHECK_NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2082
  if (klass != NULL)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2083
    return klass;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2084
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2085
  // Now look to see if it has been loaded elsewhere, and is subject to
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2086
  // a loader constraint that would require this loader to return the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2087
  // klass that is already loaded.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2088
  if (FieldType::is_array(class_name)) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2089
    // 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
  2090
    // constraint table. The element Klass*s are.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2091
    FieldArrayInfo fd;
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2092
    BasicType t = FieldType::get_array_info(class_name, fd, CHECK_(NULL));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2093
    if (t != T_OBJECT) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2094
      klass = Universe::typeArrayKlassObj(t);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2095
    } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2096
      MutexLocker mu(SystemDictionary_lock, THREAD);
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2097
      klass = constraints()->find_constrained_klass(fd.object_key(), class_loader);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2098
    }
5121
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2099
    // If element class already loaded, allocate array klass
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2100
    if (klass != NULL) {
14488
ab48109f7d1b 8001471: Klass::cast() does nothing
hseigel
parents: 14077
diff changeset
  2101
      klass = klass->array_klass_or_null(fd.dimension());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2102
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2103
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2104
    MutexLocker mu(SystemDictionary_lock, THREAD);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2105
    // Non-array classes are easy: simply check the constraint table.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2106
    klass = constraints()->find_constrained_klass(class_name, class_loader);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2107
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2108
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2109
  return klass;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2110
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2111
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2112
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2113
bool SystemDictionary::add_loader_constraint(Symbol* class_name,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2114
                                             Handle class_loader1,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2115
                                             Handle class_loader2,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2116
                                             Thread* THREAD) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2117
  ClassLoaderData* loader_data1 = class_loader_data(class_loader1);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2118
  ClassLoaderData* loader_data2 = class_loader_data(class_loader2);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2119
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2120
  Symbol* constraint_name = NULL;
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2121
  if (!FieldType::is_array(class_name)) {
5121
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2122
    constraint_name = class_name;
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2123
  } else {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2124
    // For array classes, their Klass*s are not kept in the
5121
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2125
    // constraint table. The element classes are.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2126
    FieldArrayInfo fd;
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2127
    BasicType t = FieldType::get_array_info(class_name, fd, CHECK_(false));
5121
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2128
    // primitive types always pass
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2129
    if (t != T_OBJECT) {
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2130
      return true;
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2131
    } else {
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2132
      constraint_name = fd.object_key();
5121
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2133
    }
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2134
  }
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2135
  unsigned int d_hash1 = dictionary()->compute_hash(constraint_name, loader_data1);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2136
  int d_index1 = dictionary()->hash_to_index(d_hash1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2137
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2138
  unsigned int d_hash2 = dictionary()->compute_hash(constraint_name, loader_data2);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2139
  int d_index2 = dictionary()->hash_to_index(d_hash2);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2140
  {
5121
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2141
  MutexLocker mu_s(SystemDictionary_lock, THREAD);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2142
5121
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2143
  // Better never do a GC while we're holding these oops
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2144
  No_Safepoint_Verifier nosafepoint;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2145
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2146
  Klass* klass1 = find_class(d_index1, d_hash1, constraint_name, loader_data1);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2147
  Klass* klass2 = find_class(d_index2, d_hash2, constraint_name, loader_data2);
5121
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2148
  return constraints()->add_entry(constraint_name, klass1, class_loader1,
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2149
                                  klass2, class_loader2);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2150
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2151
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2152
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2153
// Add entry to resolution error table to record the error when the first
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2154
// attempt to resolve a reference to a class has failed.
24334
36096f7271f4 8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents: 23872
diff changeset
  2155
void SystemDictionary::add_resolution_error(constantPoolHandle pool, int which,
36096f7271f4 8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents: 23872
diff changeset
  2156
                                            Symbol* error, Symbol* message) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2157
  unsigned int hash = resolution_errors()->compute_hash(pool, which);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2158
  int index = resolution_errors()->hash_to_index(hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2159
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2160
    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
  2161
    resolution_errors()->add_entry(index, hash, pool, which, error, message);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2162
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2163
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2164
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2165
// 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
  2166
void SystemDictionary::delete_resolution_error(ConstantPool* pool) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2167
  resolution_errors()->delete_entry(pool);
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2168
}
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2169
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2170
// Lookup resolution error table. Returns error if found, otherwise NULL.
24334
36096f7271f4 8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents: 23872
diff changeset
  2171
Symbol* SystemDictionary::find_resolution_error(constantPoolHandle pool, int which,
36096f7271f4 8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents: 23872
diff changeset
  2172
                                                Symbol** message) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2173
  unsigned int hash = resolution_errors()->compute_hash(pool, which);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2174
  int index = resolution_errors()->hash_to_index(hash);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2175
  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2176
    MutexLocker ml(SystemDictionary_lock, Thread::current());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2177
    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
  2178
    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
  2179
      *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
  2180
      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
  2181
    } else {
36096f7271f4 8023697: failed class resolution reports different class name in detail message for the first and subsequent times
coleenp
parents: 23872
diff changeset
  2182
      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
  2183
    }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2184
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2185
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2186
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2187
2332
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2188
// Signature constraints ensure that callers and callees agree about
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2189
// 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
  2190
// intake for constraints.  It collects them from several places:
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2191
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2192
//  * LinkResolver::resolve_method (if check_access is true) requires
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2193
//    that the resolving class (the caller) and the defining class of
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2194
//    the resolved method (the callee) agree on each type in the
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2195
//    method's signature.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2196
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2197
//  * LinkResolver::resolve_interface_method performs exactly the same
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2198
//    checks.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2199
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2200
//  * LinkResolver::resolve_field requires that the constant pool
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2201
//    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
  2202
//    class about the type of the field signature.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2203
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2204
//  * klassVtable::initialize_vtable requires that, when a class
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2205
//    overrides a vtable entry allocated by a superclass, that the
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2206
//    overriding method (i.e., the callee) agree with the superclass
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2207
//    on each type in the method's signature.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2208
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2209
//  * klassItable::initialize_itable requires that, when a class fills
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2210
//    in its itables, for each non-abstract method installed in an
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2211
//    itable, the method (i.e., the callee) agree with the interface
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2212
//    on each type in the method's signature.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2213
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2214
// All those methods have a boolean (check_access, checkconstraints)
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2215
// which turns off the checks.  This is used from specialized contexts
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2216
// such as bootstrapping, dumping, and debugging.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2217
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2218
// No direct constraint is placed between the class and its
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2219
// supertypes.  Constraints are only placed along linked relations
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2220
// between callers and callees.  When a method overrides or implements
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2221
// an abstract method in a supertype (superclass or interface), the
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2222
// 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
  2223
// overriding method.  (This works well, since callers to the
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2224
// supertype have already established agreement between themselves and
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2225
// 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
  2226
// 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
  2227
// class neither calls a relevant method of the supertype, nor is
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2228
// called (perhaps via an override) from the supertype.
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2229
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2230
//
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2231
// SystemDictionary::check_signature_loaders(sig, l1, l2)
5c7b6f4ce0a1 6814659: separable cleanups and subroutines for 6655638
jrose
parents: 2105
diff changeset
  2232
//
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2233
// Make sure all class components (including arrays) in the given
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2234
// signature will be resolved to the same class in both loaders.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2235
// 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
  2236
// NULL if no constraint failed.  No exception except OOME is thrown.
5121
5e80657d23e7 6626217: Fixed loader constraint array handling
acorn
parents: 4094
diff changeset
  2237
// 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
  2238
Symbol* SystemDictionary::check_signature_loaders(Symbol* signature,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2239
                                               Handle loader1, Handle loader2,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2240
                                               bool is_method, TRAPS)  {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2241
  // Nothing to do if loaders are the same.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2242
  if (loader1() == loader2()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2243
    return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2244
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2245
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2246
  SignatureStream sig_strm(signature, is_method);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2247
  while (!sig_strm.is_done()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2248
    if (sig_strm.is_object()) {
16591
73047b0eb568 8009731: Confusing error message for loader constraint violation
acorn
parents: 16352
diff changeset
  2249
      Symbol* sig = sig_strm.as_symbol(CHECK_NULL);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2250
      if (!add_loader_constraint(sig, loader1, loader2, THREAD)) {
16591
73047b0eb568 8009731: Confusing error message for loader constraint violation
acorn
parents: 16352
diff changeset
  2251
        return sig;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2252
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2253
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2254
    sig_strm.next();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2255
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2256
  return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2257
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2258
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2259
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2260
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
  2261
                                                            Symbol* signature,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2262
                                                            TRAPS) {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2263
  methodHandle empty;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2264
  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
  2265
         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
  2266
         iid != vmIntrinsics::_invokeGeneric,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2267
         err_msg("must be a known MH intrinsic iid=%d: %s", iid, vmIntrinsics::name_at(iid)));
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2268
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2269
  unsigned int hash  = invoke_method_table()->compute_hash(signature, iid);
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2270
  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
  2271
  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
  2272
  methodHandle m;
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2273
  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
  2274
    spe = NULL;
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2275
    // 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
  2276
    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
  2277
    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
  2278
      // 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
  2279
      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
  2280
      // 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
  2281
      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
  2282
        THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(),
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
  2283
                   "out of space in CodeCache for method handle intrinsic", empty);
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
  2284
      }
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
  2285
    }
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2286
    // 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
  2287
    // 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
  2288
    {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2289
      MutexLocker ml(SystemDictionary_lock, THREAD);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2290
      spe = invoke_method_table()->find_entry(index, hash, signature, iid);
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2291
      if (spe == NULL)
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2292
        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
  2293
      if (spe->method() == NULL)
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2294
        spe->set_method(m());
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2295
    }
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2296
  }
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2297
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2298
  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
  2299
  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
  2300
         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
  2301
         "MH intrinsic invariant");
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2302
  return spe->method();
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2303
}
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2304
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2305
// 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
  2306
static methodHandle unpack_method_and_appendix(Handle mname,
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  2307
                                               KlassHandle accessing_klass,
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2308
                                               objArrayHandle appendix_box,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2309
                                               Handle* appendix_result,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2310
                                               TRAPS) {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2311
  methodHandle empty;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2312
  if (mname.not_null()) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2313
    Metadata* vmtarget = java_lang_invoke_MemberName::vmtarget(mname());
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2314
    if (vmtarget != NULL && vmtarget->is_method()) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2315
      Method* m = (Method*)vmtarget;
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2316
      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
  2317
      if (TraceMethodHandles) {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2318
    #ifndef PRODUCT
24424
2658d7834c6e 8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents: 24352
diff changeset
  2319
        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
  2320
        m->print();
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2321
        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
  2322
        tty->cr();
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2323
    #endif //PRODUCT
9630
d6419e4395e3 6939861: JVM should handle more conversion operations
never
parents: 9172
diff changeset
  2324
      }
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2325
      (*appendix_result) = Handle(THREAD, appendix);
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  2326
      // the target is stored in the cpCache and if a reference to this
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  2327
      // MethodName is dropped we need a way to make sure the
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  2328
      // class_loader containing this method is kept alive.
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  2329
      // FIXME: the appendix might also preserve this dependency.
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  2330
      ClassLoaderData* this_key = InstanceKlass::cast(accessing_klass())->class_loader_data();
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  2331
      this_key->record_dependency(m->method_holder(), CHECK_NULL); // Can throw OOM
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2332
      return methodHandle(THREAD, m);
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2333
    }
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2334
  }
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2335
  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
  2336
  return empty;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2337
}
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2338
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2339
methodHandle SystemDictionary::find_method_handle_invoker(Symbol* name,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2340
                                                          Symbol* signature,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2341
                                                          KlassHandle 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
  2342
                                                          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
  2343
                                                          Handle *method_type_result,
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2344
                                                          TRAPS) {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2345
  methodHandle empty;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2346
  assert(!THREAD->is_Compiler_thread(), "");
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2347
  Handle method_type =
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2348
    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
  2349
  if (false) {  // FIXME: Decide if the Java upcall should resolve signatures.
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2350
    method_type = java_lang_String::create_from_symbol(signature, CHECK_(empty));
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2351
  }
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2352
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2353
  KlassHandle  mh_klass = SystemDictionary::MethodHandle_klass();
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2354
  int ref_kind = JVM_REF_invokeVirtual;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2355
  Handle name_str = StringTable::intern(name, CHECK_(empty));
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2356
  objArrayHandle appendix_box = oopFactory::new_objArray(SystemDictionary::Object_klass(), 1, CHECK_(empty));
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2357
  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
  2358
21103
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2359
  // This should not happen.  JDK code should take care of that.
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2360
  if (accessing_klass.is_null() || method_type.is_null()) {
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2361
    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
  2362
  }
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2363
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2364
  // 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
  2365
  JavaCallArguments args;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2366
  args.push_oop(accessing_klass()->java_mirror());
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2367
  args.push_int(ref_kind);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2368
  args.push_oop(mh_klass()->java_mirror());
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2369
  args.push_oop(name_str());
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2370
  args.push_oop(method_type());
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2371
  args.push_oop(appendix_box());
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2372
  JavaValue result(T_OBJECT);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2373
  JavaCalls::call_static(&result,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2374
                         SystemDictionary::MethodHandleNatives_klass(),
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2375
                         vmSymbols::linkMethod_name(),
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2376
                         vmSymbols::linkMethod_signature(),
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2377
                         &args, CHECK_(empty));
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2378
  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
  2379
  (*method_type_result) = method_type;
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  2380
  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
  2381
}
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2382
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2383
8676
9098d4e927e1 7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents: 8675
diff changeset
  2384
// 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
  2385
// signature, as interpreted relative to the given class loader.
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2386
// Because of class loader constraints, all method handle usage must be
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2387
// consistent with this loader.
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2388
Handle SystemDictionary::find_method_handle_type(Symbol* signature,
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2389
                                                 KlassHandle accessing_klass,
5420
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 5124
diff changeset
  2390
                                                 TRAPS) {
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2391
  Handle empty;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2392
  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
  2393
  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
  2394
  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
  2395
  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
  2396
  if (spe != NULL && spe->method_type() != NULL) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2397
    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
  2398
    return Handle(THREAD, spe->method_type());
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2399
  } else if (THREAD->is_Compiler_thread()) {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2400
    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
  2401
    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
  2402
  }
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2403
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2404
  Handle class_loader, protection_domain;
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2405
  bool is_on_bcp = true;  // keep this true as long as we can materialize from the boot classloader
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2406
  int npts = ArgumentCount(signature).size();
4571
80b553bddc26 6914300: ciEnv should export all well known classes
never
parents: 4564
diff changeset
  2407
  objArrayHandle pts = oopFactory::new_objArray(SystemDictionary::Class_klass(), npts, CHECK_(empty));
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2408
  int arg = 0;
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2409
  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
  2410
  ResourceMark rm(THREAD);
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2411
  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
  2412
    oop mirror = NULL;
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2413
    if (is_on_bcp) {
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2414
      // Note:  class_loader & protection_domain are both null at this point.
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2415
      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
  2416
                                 SignatureStream::ReturnNull, CHECK_(empty));
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2417
      if (mirror == NULL) {
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2418
        // fall back from BCP to accessing_klass
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2419
        if (accessing_klass.not_null()) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2420
          class_loader      = Handle(THREAD, InstanceKlass::cast(accessing_klass())->class_loader());
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2421
          protection_domain = Handle(THREAD, InstanceKlass::cast(accessing_klass())->protection_domain());
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2422
        }
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2423
        is_on_bcp = false;
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2424
      }
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2425
    }
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2426
    if (!is_on_bcp) {
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2427
      // 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
  2428
      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
  2429
                                 SignatureStream::NCDFError, CHECK_(empty));
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2430
    }
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2431
    if (ss.at_return_type())
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2432
      rt = Handle(THREAD, mirror);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2433
    else
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2434
      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
  2435
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2436
    // Check accessibility.
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2437
    if (ss.is_object() && accessing_klass.not_null()) {
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2438
      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
  2439
      mirror = NULL;  // safety
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2440
      // Emulate ConstantPool::verify_constant_pool_resolve.
14488
ab48109f7d1b 8001471: Klass::cast() does nothing
hseigel
parents: 14077
diff changeset
  2441
      if (sel_klass->oop_is_objArray())
13952
e3cf184080bc 8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents: 13753
diff changeset
  2442
        sel_klass = ObjArrayKlass::cast(sel_klass)->bottom_klass();
14488
ab48109f7d1b 8001471: Klass::cast() does nothing
hseigel
parents: 14077
diff changeset
  2443
      if (sel_klass->oop_is_instance()) {
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2444
        KlassHandle sel_kh(THREAD, sel_klass);
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2445
        LinkResolver::check_klass_accessability(accessing_klass, sel_kh, CHECK_(empty));
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2446
      }
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2447
    }
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2448
  }
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2449
  assert(arg == npts, "");
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2450
8676
9098d4e927e1 7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents: 8675
diff changeset
  2451
  // call java.lang.invoke.MethodHandleNatives::findMethodType(Class rt, Class[] pts) -> MethodType
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2452
  JavaCallArguments args(Handle(THREAD, rt()));
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2453
  args.push_oop(pts());
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2454
  JavaValue result(T_OBJECT);
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2455
  JavaCalls::call_static(&result,
5420
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 5124
diff changeset
  2456
                         SystemDictionary::MethodHandleNatives_klass(),
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 5124
diff changeset
  2457
                         vmSymbols::findMethodHandleType_name(),
9116
9bc44be338d6 6981791: remove experimental code for JSR 292
jrose
parents: 8883
diff changeset
  2458
                         vmSymbols::findMethodHandleType_signature(),
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2459
                         &args, CHECK_(empty));
6463
f4362c8da849 6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
parents: 6062
diff changeset
  2460
  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
  2461
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2462
  if (is_on_bcp) {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2463
    // 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
  2464
    MutexLocker ml(SystemDictionary_lock, THREAD);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2465
    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
  2466
    if (spe == NULL)
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2467
      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
  2468
    if (spe->method_type() == NULL) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2469
      spe->set_method_type(method_type());
6463
f4362c8da849 6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
parents: 6062
diff changeset
  2470
    }
f4362c8da849 6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
parents: 6062
diff changeset
  2471
  }
5421
e294db54fc0d 6939196: method handle signatures off the boot class path get linkage errors
jrose
parents: 5420
diff changeset
  2472
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2473
  // 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
  2474
  return method_type;
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2475
}
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2476
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2477
// Ask Java code to find or construct a method handle constant.
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2478
Handle SystemDictionary::link_method_handle_constant(KlassHandle caller,
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2479
                                                     int ref_kind, //e.g., JVM_REF_invokeVirtual
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2480
                                                     KlassHandle callee,
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2481
                                                     Symbol* name_sym,
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2482
                                                     Symbol* signature,
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2483
                                                     TRAPS) {
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2484
  Handle empty;
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2485
  Handle name = java_lang_String::create_from_symbol(name_sym, CHECK_(empty));
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2486
  Handle type;
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2487
  if (signature->utf8_length() > 0 && signature->byte_at(0) == '(') {
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2488
    type = find_method_handle_type(signature, caller, CHECK_(empty));
21103
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2489
  } else if (caller.is_null()) {
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2490
    // This should not happen.  JDK code should take care of that.
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2491
    THROW_MSG_(vmSymbols::java_lang_InternalError(), "bad MH constant", empty);
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2492
  } else {
8076
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2493
    ResourceMark rm(THREAD);
96d498ec7ae1 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 7426
diff changeset
  2494
    SignatureStream ss(signature, false);
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2495
    if (!ss.is_done()) {
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2496
      oop mirror = ss.as_java_mirror(caller->class_loader(), caller->protection_domain(),
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2497
                                     SignatureStream::NCDFError, CHECK_(empty));
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2498
      type = Handle(THREAD, mirror);
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2499
      ss.next();
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2500
      if (!ss.is_done())  type = Handle();  // error!
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2501
    }
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2502
  }
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2503
  if (type.is_null()) {
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2504
    THROW_MSG_(vmSymbols::java_lang_LinkageError(), "bad signature", empty);
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2505
  }
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2506
8676
9098d4e927e1 7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents: 8675
diff changeset
  2507
  // 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
  2508
  JavaCallArguments args;
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2509
  args.push_oop(caller->java_mirror());  // the referring class
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2510
  args.push_int(ref_kind);
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2511
  args.push_oop(callee->java_mirror());  // the target class
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2512
  args.push_oop(name());
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2513
  args.push_oop(type());
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2514
  JavaValue result(T_OBJECT);
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2515
  JavaCalls::call_static(&result,
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2516
                         SystemDictionary::MethodHandleNatives_klass(),
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2517
                         vmSymbols::linkMethodHandleConstant_name(),
9116
9bc44be338d6 6981791: remove experimental code for JSR 292
jrose
parents: 8883
diff changeset
  2518
                         vmSymbols::linkMethodHandleConstant_signature(),
5882
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2519
                         &args, CHECK_(empty));
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2520
  return Handle(THREAD, (oop) result.get_jobject());
6b2aecc4f7d8 6939203: JSR 292 needs method handle constants
jrose
parents: 5547
diff changeset
  2521
}
2534
08dac9ce0cd7 6655638: dynamic languages need method handles
jrose
parents: 2332
diff changeset
  2522
8676
9098d4e927e1 7012648: move JSR 292 to package java.lang.invoke and adjust names
jrose
parents: 8675
diff changeset
  2523
// 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
  2524
// name and signature, as interpreted relative to the given class loader.
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2525
methodHandle SystemDictionary::find_dynamic_call_site_invoker(KlassHandle caller,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2526
                                                              Handle bootstrap_specifier,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2527
                                                              Symbol* name,
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2528
                                                              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
  2529
                                                              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
  2530
                                                              Handle *method_type_result,
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2531
                                                              TRAPS) {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2532
  methodHandle empty;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2533
  Handle bsm, info;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2534
  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
  2535
    bsm = bootstrap_specifier;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2536
  } else {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2537
    assert(bootstrap_specifier->is_objArray(), "");
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2538
    objArrayHandle args(THREAD, (objArrayOop) bootstrap_specifier());
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2539
    int len = args->length();
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2540
    assert(len >= 1, "");
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2541
    bsm = Handle(THREAD, args->obj_at(0));
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2542
    if (len > 1) {
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2543
      objArrayOop args1 = oopFactory::new_objArray(SystemDictionary::Object_klass(), len-1, CHECK_(empty));
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2544
      for (int i = 1; i < len; i++)
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2545
        args1->obj_at_put(i-1, args->obj_at(i));
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2546
      info = Handle(THREAD, args1);
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2547
    }
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2548
  }
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2549
  guarantee(java_lang_invoke_MethodHandle::is_instance(bsm()),
6062
bab93afe9df7 6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents: 5882
diff changeset
  2550
            "caller must supply a valid BSM");
bab93afe9df7 6964498: JSR 292 invokedynamic sites need local bootstrap methods
jrose
parents: 5882
diff changeset
  2551
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2552
  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
  2553
  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
  2554
21103
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2555
  // This should not happen.  JDK code should take care of that.
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2556
  if (caller.is_null() || method_type.is_null()) {
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2557
    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
  2558
  }
1c85309b5895 8026502: java/lang/invoke/MethodHandleConstants.java fails on all platforms
twisti
parents: 20405
diff changeset
  2559
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2560
  objArrayHandle appendix_box = oopFactory::new_objArray(SystemDictionary::Object_klass(), 1, CHECK_(empty));
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2561
  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
  2562
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2563
  // call java.lang.invoke.MethodHandleNatives::linkCallSite(caller, bsm, name, mtype, info, &appendix)
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2564
  JavaCallArguments args;
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2565
  args.push_oop(caller->java_mirror());
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2566
  args.push_oop(bsm());
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2567
  args.push_oop(method_name());
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2568
  args.push_oop(method_type());
5420
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 5124
diff changeset
  2569
  args.push_oop(info());
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2570
  args.push_oop(appendix_box);
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2571
  JavaValue result(T_OBJECT);
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2572
  JavaCalls::call_static(&result,
5420
586d3988e72b 6939134: JSR 292 adjustments to method handle invocation
jrose
parents: 5124
diff changeset
  2573
                         SystemDictionary::MethodHandleNatives_klass(),
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2574
                         vmSymbols::linkCallSite_name(),
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2575
                         vmSymbols::linkCallSite_signature(),
2570
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2576
                         &args, CHECK_(empty));
13391
30245956af37 7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents: 13286
diff changeset
  2577
  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
  2578
  (*method_type_result) = method_type;
14588
8ec26d2d9339 8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents: 14488
diff changeset
  2579
  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
  2580
}
ecc7862946d4 6655646: dynamic languages need dynamically linked call sites
jrose
parents: 2534
diff changeset
  2581
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2582
// Since the identity hash code for symbols changes when the symbols are
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2583
// moved from the regular perm gen (hash in the mark word) to the shared
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2584
// spaces (hash is the address), the classes loaded into the dictionary
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2585
// may be in the wrong buckets.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2586
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2587
void SystemDictionary::reorder_dictionary() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2588
  dictionary()->reorder_dictionary();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2589
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2590
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2591
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2592
void SystemDictionary::copy_buckets(char** top, char* end) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2593
  dictionary()->copy_buckets(top, end);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2594
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2595
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2596
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2597
void SystemDictionary::copy_table(char** top, char* end) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2598
  dictionary()->copy_table(top, end);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2599
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2600
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2601
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2602
void SystemDictionary::reverse() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2603
  dictionary()->reverse();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2604
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2605
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2606
int SystemDictionary::number_of_classes() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2607
  return dictionary()->number_of_entries();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2608
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2609
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2610
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2611
// ----------------------------------------------------------------------------
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  2612
void SystemDictionary::print_shared(bool details) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  2613
  shared_dictionary()->print(details);
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  2614
}
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2615
26135
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  2616
void SystemDictionary::print(bool details) {
82b516c550f7 8046070: Class Data Sharing clean up and refactoring
iklam
parents: 25492
diff changeset
  2617
  dictionary()->print(details);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2618
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2619
  // Placeholders
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2620
  GCMutexLocker mu(SystemDictionary_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2621
  placeholders()->print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2622
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2623
  // loader constraints - print under SD_lock
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2624
  constraints()->print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2625
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2626
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2627
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2628
void SystemDictionary::verify() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2629
  guarantee(dictionary() != NULL, "Verify of system dictionary failed");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2630
  guarantee(constraints() != NULL,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2631
            "Verify of loader constraints failed");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2632
  guarantee(dictionary()->number_of_entries() >= 0 &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2633
            placeholders()->number_of_entries() >= 0,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2634
            "Verify of system dictionary failed");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2635
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2636
  // Verify dictionary
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2637
  dictionary()->verify();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2638
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2639
  GCMutexLocker mu(SystemDictionary_lock);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2640
  placeholders()->verify();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2641
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2642
  // Verify constraint table
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2643
  guarantee(constraints() != NULL, "Verify of loader constraints failed");
4899
ab225bac579c 6920977: G1: guarantee(k == probe->klass(),"klass should be in dictionary") fails
tonyp
parents: 4571
diff changeset
  2644
  constraints()->verify(dictionary(), placeholders());
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2645
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2646
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2647
// utility function for class load event
21767
41eaa9a17059 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents: 21103
diff changeset
  2648
void SystemDictionary::post_class_load_event(const Ticks& start_time,
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2649
                                             instanceKlassHandle k,
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2650
                                             Handle initiating_loader) {
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2651
#if INCLUDE_TRACE
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2652
  EventClassLoad event(UNTIMED);
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2653
  if (event.should_commit()) {
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2654
    event.set_starttime(start_time);
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2655
    event.set_loadedClass(k());
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2656
    oop defining_class_loader = k->class_loader();
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2657
    event.set_definingClassLoader(defining_class_loader !=  NULL ?
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2658
                                    defining_class_loader->klass() : (Klass*)NULL);
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2659
    oop class_loader = initiating_loader.is_null() ? (oop)NULL : initiating_loader();
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2660
    event.set_initiatingClassLoader(class_loader != NULL ?
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2661
                                      class_loader->klass() : (Klass*)NULL);
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2662
    event.commit();
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2663
  }
27673
df559a888b9f 8065361: Fixup headers and definitions for INCLUDE_TRACE
mgronlun
parents: 27247
diff changeset
  2664
#endif // INCLUDE_TRACE
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2665
}
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 17373
diff changeset
  2666
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2667
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2668
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2669
// statistics code
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2670
class ClassStatistics: AllStatic {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2671
 private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2672
  static int nclasses;        // number of classes
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2673
  static int nmethods;        // number of methods
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2674
  static int nmethoddata;     // number of methodData
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2675
  static int class_size;      // size of class objects in words
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2676
  static int method_size;     // size of method objects in words
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2677
  static int debug_size;      // size of debug info in methods
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2678
  static int methoddata_size; // size of methodData objects in words
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2679
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2680
  static void do_class(Klass* k) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2681
    nclasses++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2682
    class_size += k->size();
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2683
    if (k->oop_is_instance()) {
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2684
      InstanceKlass* ik = (InstanceKlass*)k;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2685
      class_size += ik->methods()->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2686
      class_size += ik->constants()->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2687
      class_size += ik->local_interfaces()->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2688
      class_size += ik->transitive_interfaces()->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2689
      // We do not have to count implementors, since we only store one!
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2690
      // SSS: How should these be accounted now that they have moved?
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2691
      // class_size += ik->fields()->length();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2692
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2693
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2694
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2695
  static void do_method(Method* m) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2696
    nmethods++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2697
    method_size += m->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2698
    // class loader uses same objArray for empty vectors, so don't count these
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2699
    if (m->has_stackmap_table()) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2700
      method_size += m->stackmap_data()->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2701
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2702
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2703
    MethodData* mdo = m->method_data();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2704
    if (mdo != NULL) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2705
      nmethoddata++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2706
      methoddata_size += mdo->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2707
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2708
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2709
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2710
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2711
  static void print() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2712
    SystemDictionary::classes_do(do_class);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2713
    SystemDictionary::methods_do(do_method);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2714
    tty->print_cr("Class statistics:");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2715
    tty->print_cr("%d classes (%d bytes)", nclasses, class_size * oopSize);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2716
    tty->print_cr("%d methods (%d bytes = %d base + %d debug info)", nmethods,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2717
                  (method_size + debug_size) * oopSize, method_size * oopSize, debug_size * oopSize);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2718
    tty->print_cr("%d methoddata (%d bytes)", nmethoddata, methoddata_size * oopSize);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2719
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2720
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2721
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2722
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2723
int ClassStatistics::nclasses        = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2724
int ClassStatistics::nmethods        = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2725
int ClassStatistics::nmethoddata     = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2726
int ClassStatistics::class_size      = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2727
int ClassStatistics::method_size     = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2728
int ClassStatistics::debug_size      = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2729
int ClassStatistics::methoddata_size = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2730
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2731
void SystemDictionary::print_class_statistics() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2732
  ResourceMark rm;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2733
  ClassStatistics::print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2734
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2735
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2736
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2737
class MethodStatistics: AllStatic {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2738
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2739
  enum {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2740
    max_parameter_size = 10
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2741
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2742
 private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2743
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2744
  static int _number_of_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2745
  static int _number_of_final_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2746
  static int _number_of_static_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2747
  static int _number_of_native_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2748
  static int _number_of_synchronized_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2749
  static int _number_of_profiled_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2750
  static int _number_of_bytecodes;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2751
  static int _parameter_size_profile[max_parameter_size];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2752
  static int _bytecodes_profile[Bytecodes::number_of_java_codes];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2753
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2754
  static void initialize() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2755
    _number_of_methods        = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2756
    _number_of_final_methods  = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2757
    _number_of_static_methods = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2758
    _number_of_native_methods = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2759
    _number_of_synchronized_methods = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2760
    _number_of_profiled_methods = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2761
    _number_of_bytecodes      = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2762
    for (int i = 0; i < max_parameter_size             ; i++) _parameter_size_profile[i] = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2763
    for (int j = 0; j < Bytecodes::number_of_java_codes; j++) _bytecodes_profile     [j] = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2764
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2765
13728
882756847a04 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 13391
diff changeset
  2766
  static void do_method(Method* m) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2767
    _number_of_methods++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2768
    // collect flag info
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2769
    if (m->is_final()       ) _number_of_final_methods++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2770
    if (m->is_static()      ) _number_of_static_methods++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2771
    if (m->is_native()      ) _number_of_native_methods++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2772
    if (m->is_synchronized()) _number_of_synchronized_methods++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2773
    if (m->method_data() != NULL) _number_of_profiled_methods++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2774
    // collect parameter size info (add one for receiver, if any)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2775
    _parameter_size_profile[MIN2(m->size_of_parameters() + (m->is_static() ? 0 : 1), max_parameter_size - 1)]++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2776
    // collect bytecodes info
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2777
    {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2778
      Thread *thread = Thread::current();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2779
      HandleMark hm(thread);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2780
      BytecodeStream s(methodHandle(thread, m));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2781
      Bytecodes::Code c;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2782
      while ((c = s.next()) >= 0) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2783
        _number_of_bytecodes++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2784
        _bytecodes_profile[c]++;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2785
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2786
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2787
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2788
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2789
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2790
  static void print() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2791
    initialize();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2792
    SystemDictionary::methods_do(do_method);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2793
    // generate output
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2794
    tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2795
    tty->print_cr("Method statistics (static):");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2796
    // flag distribution
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2797
    tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2798
    tty->print_cr("%6d final        methods  %6.1f%%", _number_of_final_methods       , _number_of_final_methods        * 100.0F / _number_of_methods);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2799
    tty->print_cr("%6d static       methods  %6.1f%%", _number_of_static_methods      , _number_of_static_methods       * 100.0F / _number_of_methods);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2800
    tty->print_cr("%6d native       methods  %6.1f%%", _number_of_native_methods      , _number_of_native_methods       * 100.0F / _number_of_methods);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2801
    tty->print_cr("%6d synchronized methods  %6.1f%%", _number_of_synchronized_methods, _number_of_synchronized_methods * 100.0F / _number_of_methods);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2802
    tty->print_cr("%6d profiled     methods  %6.1f%%", _number_of_profiled_methods, _number_of_profiled_methods * 100.0F / _number_of_methods);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2803
    // parameter size profile
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2804
    tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2805
    { int tot = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2806
      int avg = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2807
      for (int i = 0; i < max_parameter_size; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2808
        int n = _parameter_size_profile[i];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2809
        tot += n;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2810
        avg += n*i;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2811
        tty->print_cr("parameter size = %1d: %6d methods  %5.1f%%", i, n, n * 100.0F / _number_of_methods);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2812
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2813
      assert(tot == _number_of_methods, "should be the same");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2814
      tty->print_cr("                    %6d methods  100.0%%", _number_of_methods);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2815
      tty->print_cr("(average parameter size = %3.1f including receiver, if any)", (float)avg / _number_of_methods);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2816
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2817
    // bytecodes profile
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2818
    tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2819
    { int tot = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2820
      for (int i = 0; i < Bytecodes::number_of_java_codes; i++) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2821
        if (Bytecodes::is_defined(i)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2822
          Bytecodes::Code c = Bytecodes::cast(i);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2823
          int n = _bytecodes_profile[c];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2824
          tot += n;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2825
          tty->print_cr("%9d  %7.3f%%  %s", n, n * 100.0F / _number_of_bytecodes, Bytecodes::name(c));
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2826
        }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2827
      }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2828
      assert(tot == _number_of_bytecodes, "should be the same");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2829
      tty->print_cr("%9d  100.000%%", _number_of_bytecodes);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2830
    }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2831
    tty->cr();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2832
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2833
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2834
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2835
int MethodStatistics::_number_of_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2836
int MethodStatistics::_number_of_final_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2837
int MethodStatistics::_number_of_static_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2838
int MethodStatistics::_number_of_native_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2839
int MethodStatistics::_number_of_synchronized_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2840
int MethodStatistics::_number_of_profiled_methods;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2841
int MethodStatistics::_number_of_bytecodes;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2842
int MethodStatistics::_parameter_size_profile[MethodStatistics::max_parameter_size];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2843
int MethodStatistics::_bytecodes_profile[Bytecodes::number_of_java_codes];
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2844
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2845
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2846
void SystemDictionary::print_method_statistics() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2847
  MethodStatistics::print();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2848
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2849
489c9b5090e2 Initial load
duke
parents:
diff changeset
  2850
#endif // PRODUCT