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1 /*
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2 * Copyright 2002-2006 Sun Microsystems, Inc. All Rights Reserved.
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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 //
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26 // This class exposes implementation details of the various
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27 // collector(s), and we need to be very careful with it. If
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28 // use of this class grows, we should split it into public
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29 // and implemenation-private "causes".
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30 //
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31
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32 class GCCause : public AllStatic {
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33 public:
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34 enum Cause {
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35 /* public */
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36 _java_lang_system_gc,
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37 _full_gc_alot,
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38 _scavenge_alot,
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39 _allocation_profiler,
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40 _jvmti_force_gc,
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41 _gc_locker,
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42 _heap_inspection,
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43 _heap_dump,
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44
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45 /* implementation independent, but reserved for GC use */
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46 _no_gc,
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47 _no_cause_specified,
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48 _allocation_failure,
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49
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50 /* implementation specific */
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51
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52 _tenured_generation_full,
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53 _permanent_generation_full,
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54
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55 _cms_generation_full,
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56 _cms_initial_mark,
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57 _cms_final_remark,
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58
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59 _old_generation_expanded_on_last_scavenge,
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60 _old_generation_too_full_to_scavenge,
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61 _adaptive_size_policy,
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62
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342
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63 _g1_inc_collection_pause, _g1_pop_region_collection_pause,
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64
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65 _last_ditch_collection,
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66 _last_gc_cause
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67 };
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68
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69 inline static bool is_user_requested_gc(GCCause::Cause cause) {
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70 return (cause == GCCause::_java_lang_system_gc ||
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71 cause == GCCause::_jvmti_force_gc);
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72 }
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342
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73
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74 inline static bool is_serviceability_requested_gc(GCCause::Cause
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75 cause) {
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76 return (cause == GCCause::_jvmti_force_gc ||
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77 cause == GCCause::_heap_inspection ||
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78 cause == GCCause::_heap_dump);
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79 }
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342
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80
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81 // Return a string describing the GCCause.
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82 static const char* to_string(GCCause::Cause cause);
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83 // Return true if the GCCause is for a full collection.
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84 static bool is_for_full_collection(GCCause::Cause cause) PRODUCT_RETURN0;
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85 };
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