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1 /* |
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2 * Copyright (c) 2016, 2018, 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 #include "precompiled.hpp" |
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26 #include "jfr/jni/jfrJavaSupport.hpp" |
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27 #include "jfr/utilities/jfrJavaLog.hpp" |
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28 #include "jfr/utilities/jfrLogTagSets.hpp" |
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29 #include "logging/log.hpp" |
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30 #include "logging/logConfiguration.hpp" |
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31 #include "memory/resourceArea.hpp" |
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32 #include "runtime/thread.inline.hpp" |
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33 |
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34 #define JFR_LOG_TAGS_CONCATED(T0, T1, T2, T3, T4, T5, ...) \ |
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35 T0 ## _ ## T1 ## _ ## T2 ## _ ## T3 ## _ ## T4 ## _ ## T5 |
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36 |
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37 enum JfrLogTagSetType { |
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38 #define JFR_LOG_TAG(...) \ |
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39 EXPAND_VARARGS(JFR_LOG_TAGS_CONCATED(__VA_ARGS__, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG)), |
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40 |
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41 JFR_LOG_TAG_SET_LIST |
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42 |
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43 #undef JFR_LOG_TAG |
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44 JFR_LOG_TAG_SET_COUNT |
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45 }; |
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46 |
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47 struct jfrLogSubscriber |
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48 { |
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49 jobject log_tag_enum_ref; |
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50 LogTagSet* log_tag_set; |
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51 }; |
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52 |
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53 static jfrLogSubscriber log_tag_sets[JFR_LOG_TAG_SET_COUNT]; |
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54 |
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55 static void log_cfg_update(LogLevelType llt, JfrLogTagSetType jflt, TRAPS) { |
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56 DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD)); |
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57 if (log_tag_sets[jflt].log_tag_enum_ref == NULL) { |
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58 return; |
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59 } |
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60 jobject lt = log_tag_sets[jflt].log_tag_enum_ref; |
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61 // set field tagSetLevel to llt value |
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62 JavaValue result(T_VOID); |
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63 JfrJavaArguments args(&result); |
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64 args.set_klass(JfrJavaSupport::klass(lt)); |
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65 args.set_name("tagSetLevel", CHECK); |
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66 args.set_signature("I", CHECK); |
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67 args.set_receiver(JfrJavaSupport::resolve_non_null(lt)); |
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68 args.push_int(llt); |
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69 JfrJavaSupport::set_field(&args, THREAD); |
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70 } |
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71 |
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72 static LogLevelType highest_level(const LogTagSet& lts) { |
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73 for (size_t i = 0; i < LogLevel::Count; i++) { |
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74 if (lts.is_level((LogLevelType)i)) { |
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75 return (LogLevelType)i; |
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76 } |
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77 } |
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78 return LogLevel::Off; |
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79 } |
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80 |
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81 static void log_config_change_internal(bool init, TRAPS) { |
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82 LogLevelType llt; |
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83 LogTagSet* lts; |
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84 |
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85 #define JFR_LOG_TAG(...) \ |
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86 lts = &LogTagSetMapping<LOG_TAGS(__VA_ARGS__)>::tagset(); \ |
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87 if (init) { \ |
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88 JfrLogTagSetType tagSetType = \ |
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89 EXPAND_VARARGS(JFR_LOG_TAGS_CONCATED(__VA_ARGS__, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG)); \ |
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90 assert(NULL == log_tag_sets[tagSetType].log_tag_set, "Init JFR LogTagSets twice"); \ |
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91 log_tag_sets[tagSetType].log_tag_set = lts; \ |
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92 } \ |
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93 llt = highest_level(*lts); \ |
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94 log_cfg_update(llt, \ |
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95 EXPAND_VARARGS(JFR_LOG_TAGS_CONCATED(__VA_ARGS__, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG)), THREAD); |
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96 JFR_LOG_TAG_SET_LIST |
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97 #undef JFR_LOG_TAG |
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98 } |
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99 |
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100 static void log_config_change() { |
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101 Thread* t = Thread::current(); |
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102 DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(t)); |
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103 log_config_change_internal(false, t); |
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104 } |
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105 |
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106 void JfrJavaLog::subscribe_log_level(jobject log_tag, jint id, TRAPS) { |
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107 DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD)); |
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108 static bool subscribed_updates = true; |
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109 assert(id < JFR_LOG_TAG_SET_COUNT, |
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110 "LogTag id, java and native not in synch, %d < %d", id, JFR_LOG_TAG_SET_COUNT); |
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111 assert(NULL == log_tag_sets[id].log_tag_enum_ref, "Subscribing twice"); |
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112 log_tag_sets[id].log_tag_enum_ref = JfrJavaSupport::global_jni_handle(log_tag, THREAD); |
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113 if (subscribed_updates) { |
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114 LogConfiguration::register_update_listener(&log_config_change); |
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115 log_config_change_internal(true, THREAD); |
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116 subscribed_updates = false; |
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117 } else { |
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118 log_config_change_internal(false, THREAD); |
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119 } |
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120 } |
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121 |
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122 void JfrJavaLog::log(jint tag_set, jint level, jstring message, TRAPS) { |
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123 DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD)); |
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124 if (message == NULL) { |
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125 return; |
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126 } |
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127 if (level < (jint)LogLevel::First || level > (jint)LogLevel::Last) { |
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128 JfrJavaSupport::throw_illegal_argument_exception("LogLevel passed is outside valid range", THREAD); |
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129 return; |
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130 } |
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131 if (tag_set < 0 || tag_set >= (jint)JFR_LOG_TAG_SET_COUNT) { |
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132 JfrJavaSupport::throw_illegal_argument_exception("LogTagSet id is outside valid range", THREAD); |
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133 return; |
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134 } |
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135 ResourceMark rm(THREAD); |
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136 const char* const s = JfrJavaSupport::c_str(message, CHECK); |
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137 assert(s != NULL, "invariant"); |
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138 assert(log_tag_sets[tag_set].log_tag_set != NULL, "LogTagSet is not init"); |
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139 log_tag_sets[tag_set].log_tag_set->log((LogLevelType)level, s); |
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140 } |