8222125: Shenandoah: Crash when running with ShenandoahParallelSafepointThreads=1
Reviewed-by: shade
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1e6d8fbb1d
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@ -1204,7 +1204,9 @@ void ShenandoahHeap::print_gc_threads_on(outputStream* st) const {
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void ShenandoahHeap::gc_threads_do(ThreadClosure* tcl) const {
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workers()->threads_do(tcl);
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_safepoint_workers->threads_do(tcl);
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if (_safepoint_workers != NULL) {
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_safepoint_workers->threads_do(tcl);
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}
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if (ShenandoahStringDedup::is_enabled()) {
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ShenandoahStringDedup::threads_do(tcl);
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}
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@ -0,0 +1,46 @@
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/*
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* Copyright (c) 2019, Red Hat, Inc. All rights reserved.
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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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/*
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* @test TestSingleSafepointWorker
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* @key gc
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* @requires vm.gc.Shenandoah
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*
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* @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahParallelSafepointThreads=1 -Xmx128m TestSafepointWorkers
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* @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahParallelSafepointThreads=2 -Xmx128m TestSafepointWorkers
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* @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahParallelSafepointThreads=4 -Xmx128m TestSafepointWorkers
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* @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahParallelSafepointThreads=8 -Xmx128m TestSafepointWorkers
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*/
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public class TestSafepointWorkers {
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static final long TARGET_MB = Long.getLong("target", 1000); // 1 Gb allocation
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static volatile Object sink;
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public static void main(String[] args) throws Exception {
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long count = TARGET_MB * 1024 * 1024 / 16;
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for (long c = 0; c < count; c++) {
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sink = new Object();
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}
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}
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}
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