--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeManager.cpp Tue May 15 20:24:34 2018 +0200
@@ -0,0 +1,233 @@
+/*
+ * 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;
+}
+
+