| /* |
| * Copyright (c) 2002, 2013, 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_INTERFACE_GCCAUSE_HPP |
| #define SHARE_VM_GC_INTERFACE_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 implemenation-private "causes". |
| // |
| |
| 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, |
| _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, |
| |
| _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, |
| |
| _last_ditch_collection, |
| _last_gc_cause |
| }; |
| |
| inline static bool is_user_requested_gc(GCCause::Cause cause) { |
| return (cause == GCCause::_java_lang_system_gc || |
| cause == GCCause::_jvmti_force_gc); |
| } |
| |
| inline static bool is_serviceability_requested_gc(GCCause::Cause |
| cause) { |
| return (cause == GCCause::_jvmti_force_gc || |
| cause == GCCause::_heap_inspection || |
| cause == GCCause::_heap_dump); |
| } |
| |
| // Return a string describing the GCCause. |
| static const char* to_string(GCCause::Cause cause); |
| }; |
| |
| // Helper class for doing logging that includes the GC Cause |
| // as a string. |
| class GCCauseString : StackObj { |
| private: |
| static const int _length = 128; |
| char _buffer[_length]; |
| int _position; |
| |
| public: |
| GCCauseString(const char* prefix, GCCause::Cause cause) { |
| if (PrintGCCause) { |
| _position = jio_snprintf(_buffer, _length, "%s (%s) ", prefix, GCCause::to_string(cause)); |
| } else { |
| _position = jio_snprintf(_buffer, _length, "%s ", prefix); |
| } |
| assert(_position >= 0 && _position <= _length, |
| err_msg("Need to increase the buffer size in GCCauseString? %d", _position)); |
| } |
| |
| GCCauseString& append(const char* str) { |
| int res = jio_snprintf(_buffer + _position, _length - _position, "%s", str); |
| _position += res; |
| assert(res >= 0 && _position <= _length, |
| err_msg("Need to increase the buffer size in GCCauseString? %d", res)); |
| return *this; |
| } |
| |
| operator const char*() { |
| return _buffer; |
| } |
| }; |
| |
| #endif // SHARE_VM_GC_INTERFACE_GCCAUSE_HPP |