1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "gc/shared/gc.hpp"
  26 #include "gc/serial/serialGC.hpp"
  27 #include "runtime/globals.hpp"
  28 #include "utilities/globalDefinitions.hpp"
  29 #include "utilities/macros.hpp"
  30 
  31 #if INCLUDE_ALL_GCS
  32 #include "gc/parallel/parallelGC.hpp"
  33 #include "gc/cms/concurrentMarkSweepGC.hpp"
  34 #include "gc/g1/g1GC.hpp"
  35 #endif
  36 
  37 GC* GC::_gc = NULL;
  38 
  39 jint GC::initialize() {
  40   assert(_gc == NULL, "GC already created");
  41 #if !INCLUDE_ALL_GCS
  42   if (UseParallelGC) {
  43     fatal("UseParallelGC not supported in this VM.");
  44   } else if (UseG1GC) {
  45     fatal("UseG1GC not supported in this VM.");
  46   } else if (UseConcMarkSweepGC) {
  47     fatal("UseConcMarkSweepGC not supported in this VM.");
  48 #else
  49   if (UseParallelGC) {
  50     _gc = new ParallelGC();
  51   } else if (UseG1GC) {
  52     _gc = new G1GC();
  53   } else if (UseConcMarkSweepGC) {
  54     _gc = new ConcurrentMarkSweepGC();
  55 #endif
  56   } else if (UseSerialGC) {
  57     _gc = new SerialGC();
  58   } else {
  59     ShouldNotReachHere();
  60   }
  61   return JNI_OK;
  62 }
  63