61 lines
2.3 KiB
C++
61 lines
2.3 KiB
C++
/*
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* Copyright (c) 2020, 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 "runtime/safepoint.hpp"
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#include "runtime/stackWatermark.inline.hpp"
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#include "runtime/stackWatermarkSet.inline.hpp"
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#include "runtime/keepStackGCProcessed.hpp"
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KeepStackGCProcessedMark::KeepStackGCProcessedMark(JavaThread* jt) :
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_active(true),
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_jt(jt) {
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finish_processing();
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if (!Thread::current()->is_Java_thread()) {
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assert(SafepointSynchronize::is_at_safepoint() && Thread::current()->is_VM_thread(),
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"must be either Java thread or VM thread in a safepoint");
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_active = false;
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return;
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}
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StackWatermark* our_watermark = StackWatermarkSet::get(JavaThread::current(), StackWatermarkKind::gc);
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if (our_watermark == NULL) {
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_active = false;
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return;
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}
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StackWatermark* their_watermark = StackWatermarkSet::get(jt, StackWatermarkKind::gc);
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our_watermark->link_watermark(their_watermark);
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}
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KeepStackGCProcessedMark::~KeepStackGCProcessedMark() {
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if (!_active) {
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return;
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}
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StackWatermark* our_watermark = StackWatermarkSet::get(JavaThread::current(), StackWatermarkKind::gc);
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our_watermark->link_watermark(NULL);
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}
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void KeepStackGCProcessedMark::finish_processing() {
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StackWatermarkSet::finish_processing(_jt, NULL /* context */, StackWatermarkKind::gc);
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}
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