1 /* 2 * Copyright (c) 2002, 2009, 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 // 26 // This class exposes implementation details of the various 27 // collector(s), and we need to be very careful with it. If 28 // use of this class grows, we should split it into public 29 // and implemenation-private "causes". 30 // 31 32 class GCCause : public AllStatic { 33 public: 34 enum Cause { 35 /* public */ 36 _java_lang_system_gc, 37 _full_gc_alot, 38 _scavenge_alot, 39 _allocation_profiler, 40 _jvmti_force_gc, 41 _gc_locker, 42 _heap_inspection, 43 _heap_dump, 44 45 /* implementation independent, but reserved for GC use */ 46 _no_gc, 47 _no_cause_specified, 48 _allocation_failure, 49 50 /* implementation specific */ 51 52 _tenured_generation_full, 53 _permanent_generation_full, 54 55 _cms_generation_full, 56 _cms_initial_mark, 57 _cms_final_remark, 58 59 _old_generation_expanded_on_last_scavenge, 60 _old_generation_too_full_to_scavenge, 61 _adaptive_size_policy, 62 63 _g1_inc_collection_pause, 64 65 _last_ditch_collection, 66 _last_gc_cause 67 }; 68 69 inline static bool is_user_requested_gc(GCCause::Cause cause) { 70 return (cause == GCCause::_java_lang_system_gc || 71 cause == GCCause::_jvmti_force_gc); 72 } 73 74 inline static bool is_serviceability_requested_gc(GCCause::Cause 75 cause) { 76 return (cause == GCCause::_jvmti_force_gc || 77 cause == GCCause::_heap_inspection || 78 cause == GCCause::_heap_dump); 79 } 80 81 // Return a string describing the GCCause. 82 static const char* to_string(GCCause::Cause cause); 83 // Return true if the GCCause is for a full collection. 84 static bool is_for_full_collection(GCCause::Cause cause) PRODUCT_RETURN0; 85 };