1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/gc_interface/gcCause.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,124 @@
1.4 +/*
1.5 + * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_GC_INTERFACE_GCCAUSE_HPP
1.29 +#define SHARE_VM_GC_INTERFACE_GCCAUSE_HPP
1.30 +
1.31 +#include "memory/allocation.hpp"
1.32 +
1.33 +//
1.34 +// This class exposes implementation details of the various
1.35 +// collector(s), and we need to be very careful with it. If
1.36 +// use of this class grows, we should split it into public
1.37 +// and implemenation-private "causes".
1.38 +//
1.39 +
1.40 +class GCCause : public AllStatic {
1.41 + public:
1.42 + enum Cause {
1.43 + /* public */
1.44 + _java_lang_system_gc,
1.45 + _full_gc_alot,
1.46 + _scavenge_alot,
1.47 + _allocation_profiler,
1.48 + _jvmti_force_gc,
1.49 + _gc_locker,
1.50 + _heap_inspection,
1.51 + _heap_dump,
1.52 +
1.53 + /* implementation independent, but reserved for GC use */
1.54 + _no_gc,
1.55 + _no_cause_specified,
1.56 + _allocation_failure,
1.57 +
1.58 + /* implementation specific */
1.59 +
1.60 + _tenured_generation_full,
1.61 + _metadata_GC_threshold,
1.62 +
1.63 + _cms_generation_full,
1.64 + _cms_initial_mark,
1.65 + _cms_final_remark,
1.66 + _cms_concurrent_mark,
1.67 +
1.68 + _old_generation_expanded_on_last_scavenge,
1.69 + _old_generation_too_full_to_scavenge,
1.70 + _adaptive_size_policy,
1.71 +
1.72 + _g1_inc_collection_pause,
1.73 + _g1_humongous_allocation,
1.74 +
1.75 + _last_ditch_collection,
1.76 + _last_gc_cause
1.77 + };
1.78 +
1.79 + inline static bool is_user_requested_gc(GCCause::Cause cause) {
1.80 + return (cause == GCCause::_java_lang_system_gc ||
1.81 + cause == GCCause::_jvmti_force_gc);
1.82 + }
1.83 +
1.84 + inline static bool is_serviceability_requested_gc(GCCause::Cause
1.85 + cause) {
1.86 + return (cause == GCCause::_jvmti_force_gc ||
1.87 + cause == GCCause::_heap_inspection ||
1.88 + cause == GCCause::_heap_dump);
1.89 + }
1.90 +
1.91 + // Return a string describing the GCCause.
1.92 + static const char* to_string(GCCause::Cause cause);
1.93 +};
1.94 +
1.95 +// Helper class for doing logging that includes the GC Cause
1.96 +// as a string.
1.97 +class GCCauseString : StackObj {
1.98 + private:
1.99 + static const int _length = 128;
1.100 + char _buffer[_length];
1.101 + int _position;
1.102 +
1.103 + public:
1.104 + GCCauseString(const char* prefix, GCCause::Cause cause) {
1.105 + if (PrintGCCause) {
1.106 + _position = jio_snprintf(_buffer, _length, "%s (%s) ", prefix, GCCause::to_string(cause));
1.107 + } else {
1.108 + _position = jio_snprintf(_buffer, _length, "%s ", prefix);
1.109 + }
1.110 + assert(_position >= 0 && _position <= _length,
1.111 + err_msg("Need to increase the buffer size in GCCauseString? %d", _position));
1.112 + }
1.113 +
1.114 + GCCauseString& append(const char* str) {
1.115 + int res = jio_snprintf(_buffer + _position, _length - _position, "%s", str);
1.116 + _position += res;
1.117 + assert(res >= 0 && _position <= _length,
1.118 + err_msg("Need to increase the buffer size in GCCauseString? %d", res));
1.119 + return *this;
1.120 + }
1.121 +
1.122 + operator const char*() {
1.123 + return _buffer;
1.124 + }
1.125 +};
1.126 +
1.127 +#endif // SHARE_VM_GC_INTERFACE_GCCAUSE_HPP
