/*
* Copyright (c) 2017, Red Hat, Inc. and/or its affiliates.
* 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 "gc/epsilon/epsilonArguments.hpp"
#include "gc/epsilon/epsilonHeap.hpp"
#include "gc/epsilon/epsilonCollectorPolicy.hpp"
#include "gc/shared/gcArguments.inline.hpp"
#include "runtime/globals.hpp"
#include "runtime/globals_extension.hpp"
#include "runtime/vm_version.hpp"
size_t EpsilonArguments::conservative_max_heap_alignment() {
return UseLargePages ? os::large_page_size() : os::vm_page_size();
}
void EpsilonArguments::initialize_flags() {
GCArguments::initialize_flags();
assert(UseEpsilonGC || UseNoGC, "Error");
// UseNoGC is the alias, drop and replace it with the a single option:
// the rest of the code can use UseEpsilonGC then.
if (UseNoGC) {
FLAG_SET_DEFAULT(UseEpsilonGC, true);
FLAG_SET_DEFAULT(UseNoGC, false);
}
// Forcefully exit when OOME is detected. Nothing we can do at that point.
if (FLAG_IS_DEFAULT(ExitOnOutOfMemoryError)) {
FLAG_SET_DEFAULT(ExitOnOutOfMemoryError, true);
}
#if INCLUDE_ALL_GCS
if (EpsilonMaxTLABSize < MinTLABSize) {
warning("EpsilonMaxTLABSize < MinTLABSize, adjusting it to " SIZE_FORMAT, MinTLABSize);
EpsilonMaxTLABSize = MinTLABSize;
}
#endif
}
CollectedHeap* EpsilonArguments::create_heap() {
return create_heap_with_policy<EpsilonHeap, EpsilonCollectorPolicy>();
}