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annotate src/share/vm/gc_interface/gcCause.hpp @ 13212:eb03a7335eb0

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Use fixed instead of virtual register for target in far foreign call, since the register allocator does not support virtual registers to be used at call sites.
author Christian Wimmer <christian.wimmer@oracle.com>
date Mon, 02 Dec 2013 14:20:32 -0800
parents f2110083203d
children de6a9e811145
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1 /*
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2 * Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_GC_INTERFACE_GCCAUSE_HPP
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26 #define SHARE_VM_GC_INTERFACE_GCCAUSE_HPP
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27
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28 #include "memory/allocation.hpp"
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29
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30 //
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31 // This class exposes implementation details of the various
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32 // collector(s), and we need to be very careful with it. If
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33 // use of this class grows, we should split it into public
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34 // and implemenation-private "causes".
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35 //
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36
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37 class GCCause : public AllStatic {
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38 public:
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39 enum Cause {
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40 /* public */
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41 _java_lang_system_gc,
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42 _full_gc_alot,
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43 _scavenge_alot,
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44 _allocation_profiler,
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45 _jvmti_force_gc,
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46 _gc_locker,
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47 _heap_inspection,
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48 _heap_dump,
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49
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50 /* implementation independent, but reserved for GC use */
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51 _no_gc,
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52 _no_cause_specified,
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53 _allocation_failure,
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54
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55 /* implementation specific */
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56
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57 _tenured_generation_full,
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58 _metadata_GC_threshold,
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59
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60 _cms_generation_full,
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61 _cms_initial_mark,
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62 _cms_final_remark,
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63 _cms_concurrent_mark,
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64
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65 _old_generation_expanded_on_last_scavenge,
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66 _old_generation_too_full_to_scavenge,
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67 _adaptive_size_policy,
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68
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69 _g1_inc_collection_pause,
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70 _g1_humongous_allocation,
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71
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72 _last_ditch_collection,
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73 _last_gc_cause
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74 };
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75
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76 inline static bool is_user_requested_gc(GCCause::Cause cause) {
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77 return (cause == GCCause::_java_lang_system_gc ||
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78 cause == GCCause::_jvmti_force_gc);
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79 }
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80
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81 inline static bool is_serviceability_requested_gc(GCCause::Cause
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82 cause) {
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83 return (cause == GCCause::_jvmti_force_gc ||
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84 cause == GCCause::_heap_inspection ||
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85 cause == GCCause::_heap_dump);
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86 }
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87
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88 // Return a string describing the GCCause.
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89 static const char* to_string(GCCause::Cause cause);
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90 };
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91
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92 // Helper class for doing logging that includes the GC Cause
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93 // as a string.
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94 class GCCauseString : StackObj {
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95 private:
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96 static const int _length = 128;
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97 char _buffer[_length];
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98 int _position;
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99
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100 public:
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101 GCCauseString(const char* prefix, GCCause::Cause cause) {
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102 if (PrintGCCause) {
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103 _position = jio_snprintf(_buffer, _length, "%s (%s) ", prefix, GCCause::to_string(cause));
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104 } else {
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105 _position = jio_snprintf(_buffer, _length, "%s ", prefix);
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106 }
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107 assert(_position >= 0 && _position <= _length,
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108 err_msg("Need to increase the buffer size in GCCauseString? %d", _position));
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109 }
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110
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111 GCCauseString& append(const char* str) {
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112 int res = jio_snprintf(_buffer + _position, _length - _position, "%s", str);
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113 _position += res;
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114 assert(res >= 0 && _position <= _length,
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115 err_msg("Need to increase the buffer size in GCCauseString? %d", res));
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116 return *this;
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117 }
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118
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119 operator const char*() {
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120 return _buffer;
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121 }
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122 };
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123
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124 #endif // SHARE_VM_GC_INTERFACE_GCCAUSE_HPP