| /* |
| * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "jfr/recorder/checkpoint/jfrCheckpointWriter.hpp" |
| #include "jfr/recorder/checkpoint/types/jfrType.hpp" |
| #include "jfr/recorder/checkpoint/types/jfrTypeManager.hpp" |
| #include "jfr/utilities/jfrIterator.hpp" |
| #include "runtime/safepoint.hpp" |
| #include "runtime/thread.inline.hpp" |
| #include "utilities/exceptions.hpp" |
| |
| JfrSerializerRegistration::JfrSerializerRegistration(JfrTypeId id, bool permit_cache, JfrSerializer* cs) : |
| _next(NULL), |
| _prev(NULL), |
| _serializer(cs), |
| _cache(), |
| _id(id), |
| _permit_cache(permit_cache) {} |
| |
| JfrSerializerRegistration::~JfrSerializerRegistration() { |
| delete _serializer; |
| } |
| |
| JfrSerializerRegistration* JfrSerializerRegistration::next() const { |
| return _next; |
| } |
| |
| void JfrSerializerRegistration::set_next(JfrSerializerRegistration* next) { |
| _next = next; |
| } |
| |
| JfrSerializerRegistration* JfrSerializerRegistration::prev() const { |
| return _prev; |
| } |
| |
| void JfrSerializerRegistration::set_prev(JfrSerializerRegistration* prev) { |
| _prev = prev; |
| } |
| |
| JfrTypeId JfrSerializerRegistration::id() const { |
| return _id; |
| } |
| |
| void JfrSerializerRegistration::invoke_serializer(JfrCheckpointWriter& writer) const { |
| if (_cache.valid()) { |
| writer.increment(); |
| _cache->write(writer); |
| return; |
| } |
| const JfrCheckpointContext ctx = writer.context(); |
| writer.write_type(_id); |
| _serializer->serialize(writer); |
| if (_permit_cache) { |
| _cache = writer.copy(&ctx); |
| } |
| } |
| |
| JfrTypeManager::~JfrTypeManager() { |
| Iterator iter(_types); |
| JfrSerializerRegistration* registration; |
| while (iter.has_next()) { |
| registration = _types.remove(iter.next()); |
| assert(registration != NULL, "invariant"); |
| delete registration; |
| } |
| Iterator sp_type_iter(_safepoint_types); |
| while (sp_type_iter.has_next()) { |
| registration = _safepoint_types.remove(sp_type_iter.next()); |
| assert(registration != NULL, "invariant"); |
| delete registration; |
| } |
| } |
| |
| size_t JfrTypeManager::number_of_registered_types() const { |
| size_t count = 0; |
| const Iterator iter(_types); |
| while (iter.has_next()) { |
| ++count; |
| iter.next(); |
| } |
| const Iterator sp_type_iter(_safepoint_types); |
| while (sp_type_iter.has_next()) { |
| ++count; |
| sp_type_iter.next(); |
| } |
| return count; |
| } |
| |
| void JfrTypeManager::write_types(JfrCheckpointWriter& writer) const { |
| const Iterator iter(_types); |
| while (iter.has_next()) { |
| iter.next()->invoke_serializer(writer); |
| } |
| } |
| |
| void JfrTypeManager::write_safepoint_types(JfrCheckpointWriter& writer) const { |
| assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
| const Iterator iter(_safepoint_types); |
| while (iter.has_next()) { |
| iter.next()->invoke_serializer(writer); |
| } |
| } |
| |
| void JfrTypeManager::write_type_set() const { |
| assert(!SafepointSynchronize::is_at_safepoint(), "invariant"); |
| // can safepoint here because of Module_lock |
| MutexLockerEx lock(Module_lock); |
| JfrCheckpointWriter writer(true, true, Thread::current()); |
| TypeSet set; |
| set.serialize(writer); |
| } |
| |
| void JfrTypeManager::write_type_set_for_unloaded_classes() const { |
| assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
| JfrCheckpointWriter writer(false, true, Thread::current()); |
| ClassUnloadTypeSet class_unload_set; |
| class_unload_set.serialize(writer); |
| } |
| |
| void JfrTypeManager::create_thread_checkpoint(JavaThread* jt) const { |
| assert(jt != NULL, "invariant"); |
| JfrThreadConstant type_thread(jt); |
| JfrCheckpointWriter writer(false, true, jt); |
| writer.write_type(TYPE_THREAD); |
| type_thread.serialize(writer); |
| // create and install a checkpoint blob |
| jt->jfr_thread_local()->set_thread_checkpoint(writer.checkpoint_blob()); |
| assert(jt->jfr_thread_local()->has_thread_checkpoint(), "invariant"); |
| } |
| |
| void JfrTypeManager::write_thread_checkpoint(JavaThread* jt) const { |
| assert(jt != NULL, "JavaThread is NULL!"); |
| ResourceMark rm(jt); |
| if (jt->jfr_thread_local()->has_thread_checkpoint()) { |
| JfrCheckpointWriter writer(false, false, jt); |
| jt->jfr_thread_local()->thread_checkpoint()->write(writer); |
| } else { |
| JfrThreadConstant type_thread(jt); |
| JfrCheckpointWriter writer(false, true, jt); |
| writer.write_type(TYPE_THREAD); |
| type_thread.serialize(writer); |
| } |
| } |
| |
| #ifdef ASSERT |
| static void assert_not_registered_twice(JfrTypeId id, JfrTypeManager::List& list) { |
| const JfrTypeManager::Iterator iter(list); |
| while (iter.has_next()) { |
| assert(iter.next()->id() != id, "invariant"); |
| } |
| } |
| #endif |
| |
| bool JfrTypeManager::register_serializer(JfrTypeId id, bool require_safepoint, bool permit_cache, JfrSerializer* cs) { |
| assert(cs != NULL, "invariant"); |
| JfrSerializerRegistration* const registration = new JfrSerializerRegistration(id, permit_cache, cs); |
| if (registration == NULL) { |
| delete cs; |
| return false; |
| } |
| if (require_safepoint) { |
| assert(!_safepoint_types.in_list(registration), "invariant"); |
| DEBUG_ONLY(assert_not_registered_twice(id, _safepoint_types);) |
| _safepoint_types.prepend(registration); |
| } |
| else { |
| assert(!_types.in_list(registration), "invariant"); |
| DEBUG_ONLY(assert_not_registered_twice(id, _types);) |
| _types.prepend(registration); |
| } |
| return true; |
| } |
| |
| bool JfrTypeManager::initialize() { |
| // register non-safepointing type serialization |
| for (size_t i = 0; i < 16; ++i) { |
| switch (i) { |
| case 0: register_serializer(TYPE_FLAGVALUEORIGIN, false, true, new FlagValueOriginConstant()); break; |
| case 1: register_serializer(TYPE_INFLATECAUSE, false, true, new MonitorInflateCauseConstant()); break; |
| case 2: register_serializer(TYPE_GCCAUSE, false, true, new GCCauseConstant()); break; |
| case 3: register_serializer(TYPE_GCNAME, false, true, new GCNameConstant()); break; |
| case 4: register_serializer(TYPE_GCWHEN, false, true, new GCWhenConstant()); break; |
| case 5: register_serializer(TYPE_G1HEAPREGIONTYPE, false, true, new G1HeapRegionTypeConstant()); break; |
| case 6: register_serializer(TYPE_GCTHRESHOLDUPDATER, false, true, new GCThresholdUpdaterConstant()); break; |
| case 7: register_serializer(TYPE_METADATATYPE, false, true, new MetadataTypeConstant()); break; |
| case 8: register_serializer(TYPE_METASPACEOBJECTTYPE, false, true, new MetaspaceObjectTypeConstant()); break; |
| case 9: register_serializer(TYPE_G1YCTYPE, false, true, new G1YCTypeConstant()); break; |
| case 10: register_serializer(TYPE_REFERENCETYPE, false, true, new ReferenceTypeConstant()); break; |
| case 11: register_serializer(TYPE_NARROWOOPMODE, false, true, new NarrowOopModeConstant()); break; |
| case 12: register_serializer(TYPE_COMPILERPHASETYPE, false, true, new CompilerPhaseTypeConstant()); break; |
| case 13: register_serializer(TYPE_CODEBLOBTYPE, false, true, new CodeBlobTypeConstant()); break; |
| case 14: register_serializer(TYPE_VMOPERATIONTYPE, false, true, new VMOperationTypeConstant()); break; |
| case 15: register_serializer(TYPE_THREADSTATE, false, true, new ThreadStateConstant()); break; |
| default: |
| guarantee(false, "invariant"); |
| } |
| } |
| |
| // register safepointing type serialization |
| for (size_t i = 0; i < 2; ++i) { |
| switch (i) { |
| case 0: register_serializer(TYPE_THREADGROUP, true, false, new JfrThreadGroupConstant()); break; |
| case 1: register_serializer(TYPE_THREAD, true, false, new JfrThreadConstantSet()); break; |
| default: |
| guarantee(false, "invariant"); |
| } |
| } |
| return true; |
| } |
| |
| |