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src/hotspot/share/jfr/support/jfrEpochSynchronization.cpp
39 строк
2 KB
David Holmes
8252406: Introduce Thread::as_Java_thread() convenience function
11 сен 2020, 04:31
11 сен 2020, 04:31
976acdd
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/* * Copyright (c) 2019, 2020, 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/types/traceid/jfrTraceIdEpoch.hpp" #include "jfr/support/jfrEpochSynchronization.hpp" #include "runtime/interfaceSupport.inline.hpp" #include "runtime/thread.inline.hpp" JfrEpochSynchronization::JfrEpochSynchronization() { if (JfrTraceIdEpoch::is_synchronizing()) { // only at a safepoint JavaThread* const jt = JavaThread::current(); assert(jt->thread_state() == _thread_in_native, "invariant"); // use ordinary transition to have the thread block and await the new epoch ThreadInVMfromNative transition(jt); } }