/*

 * Copyright (c) 2017, 2018, Red Hat, Inc. 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 "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"

#include "utilities/macros.hpp"

size_t EpsilonArguments::conservative_max_heap_alignment() {

  return UseLargePages ? os::large_page_size() : os::vm_page_size();

}

void EpsilonArguments::initialize() {

  GCArguments::initialize();

  assert(UseEpsilonGC, "Sanity");

  // Forcefully exit when OOME is detected. Nothing we can do at that point.

  if (FLAG_IS_DEFAULT(ExitOnOutOfMemoryError)) {

    FLAG_SET_DEFAULT(ExitOnOutOfMemoryError, true);

  }

  if (EpsilonMaxTLABSize < MinTLABSize) {

    warning("EpsilonMaxTLABSize < MinTLABSize, adjusting it to " SIZE_FORMAT, MinTLABSize);

    EpsilonMaxTLABSize = MinTLABSize;

  }

  if (!EpsilonElasticTLAB && EpsilonElasticTLABDecay) {

    warning("Disabling EpsilonElasticTLABDecay because EpsilonElasticTLAB is disabled");

    FLAG_SET_DEFAULT(EpsilonElasticTLABDecay, false);

  }

#ifdef COMPILER2

  // Enable loop strip mining: there are still non-GC safepoints, no need to make it worse

  if (FLAG_IS_DEFAULT(UseCountedLoopSafepoints)) {

    FLAG_SET_DEFAULT(UseCountedLoopSafepoints, true);

    if (FLAG_IS_DEFAULT(LoopStripMiningIter)) {

      FLAG_SET_DEFAULT(LoopStripMiningIter, 1000);

    }

  }

#endif

}

CollectedHeap* EpsilonArguments::create_heap() {

  return create_heap_with_policy<EpsilonHeap, EpsilonCollectorPolicy>();

}