Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/gc_interface/gcCause.hpp@f90c822e73f8 (annotated)
src/share/vm/gc_interface/gcCause.hpp
Wed, 27 Apr 2016 01:25:04 +0800
- author
- aoqi
- date
- Wed, 27 Apr 2016 01:25:04 +0800
- changeset 0
- f90c822e73f8
- child 6876
- 710a3c8b516e
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http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | * |
| aoqi@0 | 23 | */ |
| aoqi@0 | 24 | |
| aoqi@0 | 25 | #ifndef SHARE_VM_GC_INTERFACE_GCCAUSE_HPP |
| aoqi@0 | 26 | #define SHARE_VM_GC_INTERFACE_GCCAUSE_HPP |
| aoqi@0 | 27 | |
| aoqi@0 | 28 | #include "memory/allocation.hpp" |
| aoqi@0 | 29 | |
| aoqi@0 | 30 | // |
| aoqi@0 | 31 | // This class exposes implementation details of the various |
| aoqi@0 | 32 | // collector(s), and we need to be very careful with it. If |
| aoqi@0 | 33 | // use of this class grows, we should split it into public |
| aoqi@0 | 34 | // and implemenation-private "causes". |
| aoqi@0 | 35 | // |
| aoqi@0 | 36 | |
| aoqi@0 | 37 | class GCCause : public AllStatic { |
| aoqi@0 | 38 | public: |
| aoqi@0 | 39 | enum Cause { |
| aoqi@0 | 40 | /* public */ |
| aoqi@0 | 41 | _java_lang_system_gc, |
| aoqi@0 | 42 | _full_gc_alot, |
| aoqi@0 | 43 | _scavenge_alot, |
| aoqi@0 | 44 | _allocation_profiler, |
| aoqi@0 | 45 | _jvmti_force_gc, |
| aoqi@0 | 46 | _gc_locker, |
| aoqi@0 | 47 | _heap_inspection, |
| aoqi@0 | 48 | _heap_dump, |
| aoqi@0 | 49 | |
| aoqi@0 | 50 | /* implementation independent, but reserved for GC use */ |
| aoqi@0 | 51 | _no_gc, |
| aoqi@0 | 52 | _no_cause_specified, |
| aoqi@0 | 53 | _allocation_failure, |
| aoqi@0 | 54 | |
| aoqi@0 | 55 | /* implementation specific */ |
| aoqi@0 | 56 | |
| aoqi@0 | 57 | _tenured_generation_full, |
| aoqi@0 | 58 | _metadata_GC_threshold, |
| aoqi@0 | 59 | |
| aoqi@0 | 60 | _cms_generation_full, |
| aoqi@0 | 61 | _cms_initial_mark, |
| aoqi@0 | 62 | _cms_final_remark, |
| aoqi@0 | 63 | _cms_concurrent_mark, |
| aoqi@0 | 64 | |
| aoqi@0 | 65 | _old_generation_expanded_on_last_scavenge, |
| aoqi@0 | 66 | _old_generation_too_full_to_scavenge, |
| aoqi@0 | 67 | _adaptive_size_policy, |
| aoqi@0 | 68 | |
| aoqi@0 | 69 | _g1_inc_collection_pause, |
| aoqi@0 | 70 | _g1_humongous_allocation, |
| aoqi@0 | 71 | |
| aoqi@0 | 72 | _last_ditch_collection, |
| aoqi@0 | 73 | _last_gc_cause |
| aoqi@0 | 74 | }; |
| aoqi@0 | 75 | |
| aoqi@0 | 76 | inline static bool is_user_requested_gc(GCCause::Cause cause) { |
| aoqi@0 | 77 | return (cause == GCCause::_java_lang_system_gc || |
| aoqi@0 | 78 | cause == GCCause::_jvmti_force_gc); |
| aoqi@0 | 79 | } |
| aoqi@0 | 80 | |
| aoqi@0 | 81 | inline static bool is_serviceability_requested_gc(GCCause::Cause |
| aoqi@0 | 82 | cause) { |
| aoqi@0 | 83 | return (cause == GCCause::_jvmti_force_gc || |
| aoqi@0 | 84 | cause == GCCause::_heap_inspection || |
| aoqi@0 | 85 | cause == GCCause::_heap_dump); |
| aoqi@0 | 86 | } |
| aoqi@0 | 87 | |
| aoqi@0 | 88 | // Return a string describing the GCCause. |
| aoqi@0 | 89 | static const char* to_string(GCCause::Cause cause); |
| aoqi@0 | 90 | }; |
| aoqi@0 | 91 | |
| aoqi@0 | 92 | // Helper class for doing logging that includes the GC Cause |
| aoqi@0 | 93 | // as a string. |
| aoqi@0 | 94 | class GCCauseString : StackObj { |
| aoqi@0 | 95 | private: |
| aoqi@0 | 96 | static const int _length = 128; |
| aoqi@0 | 97 | char _buffer[_length]; |
| aoqi@0 | 98 | int _position; |
| aoqi@0 | 99 | |
| aoqi@0 | 100 | public: |
| aoqi@0 | 101 | GCCauseString(const char* prefix, GCCause::Cause cause) { |
| aoqi@0 | 102 | if (PrintGCCause) { |
| aoqi@0 | 103 | _position = jio_snprintf(_buffer, _length, "%s (%s) ", prefix, GCCause::to_string(cause)); |
| aoqi@0 | 104 | } else { |
| aoqi@0 | 105 | _position = jio_snprintf(_buffer, _length, "%s ", prefix); |
| aoqi@0 | 106 | } |
| aoqi@0 | 107 | assert(_position >= 0 && _position <= _length, |
| aoqi@0 | 108 | err_msg("Need to increase the buffer size in GCCauseString? %d", _position)); |
| aoqi@0 | 109 | } |
| aoqi@0 | 110 | |
| aoqi@0 | 111 | GCCauseString& append(const char* str) { |
| aoqi@0 | 112 | int res = jio_snprintf(_buffer + _position, _length - _position, "%s", str); |
| aoqi@0 | 113 | _position += res; |
| aoqi@0 | 114 | assert(res >= 0 && _position <= _length, |
| aoqi@0 | 115 | err_msg("Need to increase the buffer size in GCCauseString? %d", res)); |
| aoqi@0 | 116 | return *this; |
| aoqi@0 | 117 | } |
| aoqi@0 | 118 | |
| aoqi@0 | 119 | operator const char*() { |
| aoqi@0 | 120 | return _buffer; |
| aoqi@0 | 121 | } |
| aoqi@0 | 122 | }; |
| aoqi@0 | 123 | |
| aoqi@0 | 124 | #endif // SHARE_VM_GC_INTERFACE_GCCAUSE_HPP |
