| /* |
| * Copyright (c) 2002, 2015, 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. |
| * |
| */ |
| |
| #ifndef SHARE_VM_GC_SHARED_GCCAUSE_HPP |
| #define SHARE_VM_GC_SHARED_GCCAUSE_HPP |
| |
| #include "memory/allocation.hpp" |
| |
| // |
| // This class exposes implementation details of the various |
| // collector(s), and we need to be very careful with it. If |
| // use of this class grows, we should split it into public |
| // and implementation-private "causes". |
| // |
| // The definitions in the SA code should be kept in sync |
| // with the definitions here. |
| // |
| |
| class GCCause : public AllStatic { |
| public: |
| enum Cause { |
| /* public */ |
| _java_lang_system_gc, |
| _full_gc_alot, |
| _scavenge_alot, |
| _allocation_profiler, |
| _jvmti_force_gc, |
| _gc_locker, |
| _heap_inspection, |
| _heap_dump, |
| _wb_young_gc, |
| _wb_conc_mark, |
| _wb_full_gc, |
| _update_allocation_context_stats_inc, |
| _update_allocation_context_stats_full, |
| |
| /* implementation independent, but reserved for GC use */ |
| _no_gc, |
| _no_cause_specified, |
| _allocation_failure, |
| |
| /* implementation specific */ |
| |
| _tenured_generation_full, |
| _metadata_GC_threshold, |
| _metadata_GC_clear_soft_refs, |
| |
| _cms_generation_full, |
| _cms_initial_mark, |
| _cms_final_remark, |
| _cms_concurrent_mark, |
| |
| _old_generation_expanded_on_last_scavenge, |
| _old_generation_too_full_to_scavenge, |
| _adaptive_size_policy, |
| |
| _g1_inc_collection_pause, |
| _g1_humongous_allocation, |
| |
| _dcmd_gc_run, |
| |
| _last_gc_cause |
| }; |
| |
| inline static bool is_user_requested_gc(GCCause::Cause cause) { |
| return (cause == GCCause::_java_lang_system_gc || |
| cause == GCCause::_dcmd_gc_run); |
| } |
| |
| inline static bool is_serviceability_requested_gc(GCCause::Cause |
| cause) { |
| return (cause == GCCause::_jvmti_force_gc || |
| cause == GCCause::_heap_inspection || |
| cause == GCCause::_heap_dump); |
| } |
| |
| // Causes for collection of the tenured gernation |
| inline static bool is_tenured_allocation_failure_gc(GCCause::Cause cause) { |
| assert(cause != GCCause::_old_generation_too_full_to_scavenge && |
| cause != GCCause::_old_generation_expanded_on_last_scavenge, |
| "This GCCause may be correct but is not expected yet: %s", |
| to_string(cause)); |
| // _tenured_generation_full or _cms_generation_full for full tenured generations |
| // _adaptive_size_policy for a full collection after a young GC |
| // _allocation_failure is the generic cause a collection which could result |
| // in the collection of the tenured generation if there is not enough space |
| // in the tenured generation to support a young GC. |
| return (cause == GCCause::_tenured_generation_full || |
| cause == GCCause::_cms_generation_full || |
| cause == GCCause::_adaptive_size_policy || |
| cause == GCCause::_allocation_failure); |
| } |
| |
| // Causes for collection of the young generation |
| inline static bool is_allocation_failure_gc(GCCause::Cause cause) { |
| // _allocation_failure is the generic cause a collection for allocation failure |
| // _adaptive_size_policy is for a collecton done before a full GC |
| return (cause == GCCause::_allocation_failure || |
| cause == GCCause::_adaptive_size_policy); |
| } |
| |
| // Return a string describing the GCCause. |
| static const char* to_string(GCCause::Cause cause); |
| }; |
| |
| #endif // SHARE_VM_GC_SHARED_GCCAUSE_HPP |