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1 /*
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844
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2 * Copyright 2001-2009 Sun Microsystems, Inc. All Rights Reserved.
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342
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // VM_operations for the G1 collector.
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26 // VM_GC_Operation:
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27 // - VM_CGC_Operation
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28 // - VM_G1CollectFull
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29 // - VM_G1CollectForAllocation
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30 // - VM_G1IncCollectionPause
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31 // - VM_G1PopRegionCollectionPause
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32
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33 class VM_G1CollectFull: public VM_GC_Operation {
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34 private:
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35 public:
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36 VM_G1CollectFull(int gc_count_before,
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37 GCCause::Cause gc_cause)
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38 : VM_GC_Operation(gc_count_before)
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39 {
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40 _gc_cause = gc_cause;
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41 }
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42 ~VM_G1CollectFull() {}
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43 virtual VMOp_Type type() const { return VMOp_G1CollectFull; }
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44 virtual void doit();
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45 virtual const char* name() const {
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46 return "full garbage-first collection";
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47 }
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48 };
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49
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50 class VM_G1CollectForAllocation: public VM_GC_Operation {
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51 private:
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52 HeapWord* _res;
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53 size_t _size; // size of object to be allocated
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54 public:
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55 VM_G1CollectForAllocation(size_t size, int gc_count_before)
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56 : VM_GC_Operation(gc_count_before) {
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57 _size = size;
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58 _res = NULL;
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59 }
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60 ~VM_G1CollectForAllocation() {}
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61 virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; }
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62 virtual void doit();
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63 virtual const char* name() const {
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64 return "garbage-first collection to satisfy allocation";
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65 }
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66 HeapWord* result() { return _res; }
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67 };
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68
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69 class VM_G1IncCollectionPause: public VM_GC_Operation {
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70 public:
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71 VM_G1IncCollectionPause(int gc_count_before) :
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72 VM_GC_Operation(gc_count_before) {}
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73 virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; }
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74 virtual void doit();
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75 virtual const char* name() const {
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76 return "garbage-first incremental collection pause";
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77 }
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78 };
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79
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80 // Concurrent GC stop-the-world operations such as initial and final mark;
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81 // consider sharing these with CMS's counterparts.
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82 class VM_CGC_Operation: public VM_Operation {
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83 VoidClosure* _cl;
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84 const char* _printGCMessage;
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85 public:
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86 VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg) :
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87 _cl(cl),
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88 _printGCMessage(printGCMsg)
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89 {}
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90
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91 ~VM_CGC_Operation() {}
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92
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93 virtual VMOp_Type type() const { return VMOp_CGC_Operation; }
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94 virtual void doit();
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95 virtual bool doit_prologue();
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96 virtual void doit_epilogue();
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97 virtual const char* name() const {
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98 return "concurrent gc";
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99 }
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100 };
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