apetushkov@9858: /*
apetushkov@9858:  * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
apetushkov@9858:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
apetushkov@9858:  *
apetushkov@9858:  * This code is free software; you can redistribute it and/or modify it
apetushkov@9858:  * under the terms of the GNU General Public License version 2 only, as
apetushkov@9858:  * published by the Free Software Foundation.
apetushkov@9858:  *
apetushkov@9858:  * This code is distributed in the hope that it will be useful, but WITHOUT
apetushkov@9858:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
apetushkov@9858:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
apetushkov@9858:  * version 2 for more details (a copy is included in the LICENSE file that
apetushkov@9858:  * accompanied this code).
apetushkov@9858:  *
apetushkov@9858:  * You should have received a copy of the GNU General Public License version
apetushkov@9858:  * 2 along with this work; if not, write to the Free Software Foundation,
apetushkov@9858:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
apetushkov@9858:  *
apetushkov@9858:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
apetushkov@9858:  * or visit www.oracle.com if you need additional information or have any
apetushkov@9858:  * questions.
apetushkov@9858:  *
apetushkov@9858:  */
apetushkov@9858: 
apetushkov@9858: #include "precompiled.hpp"
apetushkov@9858: #include "jfr/recorder/jfrEventSetting.inline.hpp"
apetushkov@9858: #include "jfr/recorder/storage/jfrStorage.hpp"
apetushkov@9858: #include "jfr/recorder/stacktrace/jfrStackTraceRepository.hpp"
apetushkov@9858: #include "jfr/support/jfrFlush.hpp"
apetushkov@9858: #include "jfr/support/jfrThreadLocal.hpp"
apetushkov@9858: #include "runtime/thread.inline.hpp"
apetushkov@9858: #include "utilities/debug.hpp"
apetushkov@9858: 
apetushkov@9858: JfrFlush::JfrFlush(JfrStorage::Buffer* old, size_t used, size_t requested, Thread* t) :
apetushkov@9858:   _result(JfrStorage::flush(old, used, requested, true, t)) {
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: template <typename T>
apetushkov@9858: class LessThanHalfBufferSize : AllStatic {
apetushkov@9858: public:
apetushkov@9858:   static bool evaluate(T* t) {
apetushkov@9858:     assert(t != NULL, "invariant");
apetushkov@9858:     return t->free_size() < t->size() / 2;
apetushkov@9858:   }
apetushkov@9858: };
apetushkov@9858: 
apetushkov@9858: template <typename T>
apetushkov@9858: class LessThanSize : AllStatic {
apetushkov@9858:  public:
apetushkov@9858:   static bool evaluate(T* t, size_t size) {
apetushkov@9858:     assert(t != NULL, "invariant");
apetushkov@9858:     return t->free_size() < size;
apetushkov@9858:   }
apetushkov@9858: };
apetushkov@9858: 
apetushkov@9858: bool jfr_is_event_enabled(JfrEventId id) {
apetushkov@9858:   return JfrEventSetting::is_enabled(id);
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: bool jfr_has_stacktrace_enabled(JfrEventId id) {
apetushkov@9858:   return JfrEventSetting::has_stacktrace(id);
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: void jfr_conditional_flush(JfrEventId id, size_t size, Thread* t) {
apetushkov@9858:   assert(jfr_is_event_enabled(id), "invariant");
apetushkov@9858:   if (t->jfr_thread_local()->has_native_buffer()) {
apetushkov@9858:     JfrStorage::Buffer* const buffer = t->jfr_thread_local()->native_buffer();
apetushkov@9858:     if (LessThanSize<JfrStorage::Buffer>::evaluate(buffer, size)) {
apetushkov@9858:       JfrFlush f(buffer, 0, 0, t);
apetushkov@9858:     }
apetushkov@9858:   }
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: bool jfr_save_stacktrace(Thread* t) {
apetushkov@9858:   JfrThreadLocal* const tl = t->jfr_thread_local();
apetushkov@9858:   if (tl->has_cached_stack_trace()) {
apetushkov@9858:     return false; // no ownership
apetushkov@9858:   }
apetushkov@9858:   tl->set_cached_stack_trace_id(JfrStackTraceRepository::record(t));
apetushkov@9858:   return true;
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: void jfr_clear_stacktrace(Thread* t) {
apetushkov@9858:   t->jfr_thread_local()->clear_cached_stack_trace();
apetushkov@9858: }