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13b56530f4
G1 and CMS delay worker thread creation until BarrierSet exists. Reviewed-by: dholmes, tschatzl
60 lines
2.3 KiB
C++
60 lines
2.3 KiB
C++
/*
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* Copyright (c) 1997, 2018, 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 "gc/shared/barrierSet.hpp"
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#include "gc/shared/barrierSetAssembler.hpp"
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#include "runtime/thread.hpp"
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#include "utilities/debug.hpp"
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#include "utilities/macros.hpp"
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BarrierSet* BarrierSet::_barrier_set = NULL;
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void BarrierSet::set_barrier_set(BarrierSet* barrier_set) {
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assert(_barrier_set == NULL, "Already initialized");
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_barrier_set = barrier_set;
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// Notify barrier set of the current (main) thread. Normally the
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// Thread constructor deals with this, but the main thread is
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// created before we get here. Verify it isn't yet on the thread
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// list, else we'd also need to call BarrierSet::on_thread_attach.
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// This is the only thread that can exist at this point; the Thread
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// constructor objects to other threads being created before the
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// barrier set is available.
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assert(Thread::current()->is_Java_thread(),
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"Expected main thread to be a JavaThread");
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assert(!JavaThread::current()->on_thread_list(),
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"Main thread already on thread list.");
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_barrier_set->on_thread_create(Thread::current());
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}
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// Called from init.cpp
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void gc_barrier_stubs_init() {
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BarrierSet* bs = BarrierSet::barrier_set();
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#ifndef ZERO
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BarrierSetAssembler* bs_assembler = bs->barrier_set_assembler();
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bs_assembler->barrier_stubs_init();
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#endif
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}
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