/*

 * Copyright (c) 2017, 2019, Oracle and/or its affiliates. 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/z/zArguments.hpp"

#include "gc/z/zCollectedHeap.hpp"

#include "gc/z/zWorkers.hpp"

#include "gc/shared/gcArguments.hpp"

#include "runtime/globals.hpp"

#include "runtime/globals_extension.hpp"

void ZArguments::initialize_alignments() {

  SpaceAlignment = ZGranuleSize;

  HeapAlignment = SpaceAlignment;

}

void ZArguments::initialize() {

  GCArguments::initialize();

  // Enable NUMA by default

  if (FLAG_IS_DEFAULT(UseNUMA)) {

    FLAG_SET_DEFAULT(UseNUMA, true);

  }

  // Disable biased locking by default

  if (FLAG_IS_DEFAULT(UseBiasedLocking)) {

    FLAG_SET_DEFAULT(UseBiasedLocking, false);

  }

  // Select number of parallel threads

  if (FLAG_IS_DEFAULT(ParallelGCThreads)) {

    FLAG_SET_DEFAULT(ParallelGCThreads, ZWorkers::calculate_nparallel());

  }

  if (ParallelGCThreads == 0) {

    vm_exit_during_initialization("The flag -XX:+UseZGC can not be combined with -XX:ParallelGCThreads=0");

  }

  // Select number of concurrent threads

  if (FLAG_IS_DEFAULT(ConcGCThreads)) {

    FLAG_SET_DEFAULT(ConcGCThreads, ZWorkers::calculate_nconcurrent());

  }

  if (ConcGCThreads == 0) {

    vm_exit_during_initialization("The flag -XX:+UseZGC can not be combined with -XX:ConcGCThreads=0");

  }

#ifdef COMPILER2

  // Enable loop strip mining by default

  if (FLAG_IS_DEFAULT(UseCountedLoopSafepoints)) {

    FLAG_SET_DEFAULT(UseCountedLoopSafepoints, true);

    if (FLAG_IS_DEFAULT(LoopStripMiningIter)) {

      FLAG_SET_DEFAULT(LoopStripMiningIter, 1000);

    }

  }

#endif

  // CompressedOops/UseCompressedClassPointers not supported

  FLAG_SET_DEFAULT(UseCompressedOops, false);

  FLAG_SET_DEFAULT(UseCompressedClassPointers, false);

  // Verification before startup and after exit not (yet) supported

  FLAG_SET_DEFAULT(VerifyDuringStartup, false);

  FLAG_SET_DEFAULT(VerifyBeforeExit, false);

  // Verification before heap iteration not (yet) supported, for the

  // same reason we need fixup_partial_loads

  FLAG_SET_DEFAULT(VerifyBeforeIteration, false);

  if (VerifyBeforeGC || VerifyDuringGC || VerifyAfterGC) {

    FLAG_SET_DEFAULT(ZVerifyRoots, true);

    FLAG_SET_DEFAULT(ZVerifyObjects, true);

  }

  // Verification of stacks not (yet) supported, for the same reason

  // we need fixup_partial_loads

  DEBUG_ONLY(FLAG_SET_DEFAULT(VerifyStack, false));

  // Initialize platform specific arguments

  initialize_platform();

}

size_t ZArguments::conservative_max_heap_alignment() {

  return 0;

}

CollectedHeap* ZArguments::create_heap() {

  return new ZCollectedHeap();

}