1 /*
2 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jfr/jni/jfrJavaSupport.hpp"
27 #include "jfr/utilities/jfrJavaLog.hpp"
28 #include "memory/resourceArea.hpp"
29 #include "runtime/thread.inline.hpp"
30
31 // #define JFR_LOG_TAGS_CONCATED(T0, T1, T2, T3, T4, T5, ...) \
32 // T0 ## _ ## T1 ## _ ## T2 ## _ ## T3 ## _ ## T4 ## _ ## T5
33
34 // enum JfrLogTagSetType {
35 // #define JFR_LOG_TAG(...) \
36 // EXPAND_VARARGS(JFR_LOG_TAGS_CONCATED(__VA_ARGS__, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG)),
37
38 // JFR_LOG_TAG_SET_LIST
39
40 // #undef JFR_LOG_TAG
41 // JFR_LOG_TAG_SET_COUNT
42 // };
43
44 // struct jfrLogSubscriber
45 // {
46 // jobject log_tag_enum_ref;
47 // LogTagSet* log_tag_set;
48 // };
49
50 // static jfrLogSubscriber log_tag_sets[JFR_LOG_TAG_SET_COUNT];
51
52 // static void log_cfg_update(LogLevelType llt, JfrLogTagSetType jflt, TRAPS) {
53 // DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));
54 // if (log_tag_sets[jflt].log_tag_enum_ref == NULL) {
55 // return;
56 // }
57 // jobject lt = log_tag_sets[jflt].log_tag_enum_ref;
58 // // set field tagSetLevel to llt value
59 // JavaValue result(T_VOID);
60 // JfrJavaArguments args(&result);
61 // args.set_klass(JfrJavaSupport::klass(lt));
62 // args.set_name("tagSetLevel", CHECK);
63 // args.set_signature("I", CHECK);
64 // args.set_receiver(JfrJavaSupport::resolve_non_null(lt));
65 // args.push_int(llt);
66 // JfrJavaSupport::set_field(&args, THREAD);
67 // }
68
69 // static LogLevelType highest_level(const LogTagSet& lts) {
70 // for (size_t i = 0; i < LogLevel::Count; i++) {
71 // if (lts.is_level((LogLevelType)i)) {
72 // return (LogLevelType)i;
73 // }
74 // }
75 // return LogLevel::Off;
76 // }
77
78 // static void log_config_change_internal(bool init, TRAPS) {
79 // LogLevelType llt;
80 // LogTagSet* lts;
81
82 // #define JFR_LOG_TAG(...) \
83 // lts = &LogTagSetMapping<LOG_TAGS(__VA_ARGS__)>::tagset(); \
84 // if (init) { \
85 // JfrLogTagSetType tagSetType = \
86 // EXPAND_VARARGS(JFR_LOG_TAGS_CONCATED(__VA_ARGS__, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG)); \
87 // assert(NULL == log_tag_sets[tagSetType].log_tag_set, "Init JFR LogTagSets twice"); \
88 // log_tag_sets[tagSetType].log_tag_set = lts; \
89 // } \
90 // llt = highest_level(*lts); \
91 // log_cfg_update(llt, \
92 // EXPAND_VARARGS(JFR_LOG_TAGS_CONCATED(__VA_ARGS__, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG)), THREAD);
93 // JFR_LOG_TAG_SET_LIST
94 // #undef JFR_LOG_TAG
95 // }
96
97 // static void log_config_change() {
98 // Thread* t = Thread::current();
99 // DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(t));
100 // log_config_change_internal(false, t);
101 // }
102
103 void JfrJavaLog::subscribe_log_level(jobject log_tag, jint id, TRAPS) {
104 DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));
105 // static bool subscribed_updates = true;
106 // assert(id < JFR_LOG_TAG_SET_COUNT,
107 // "LogTag id, java and native not in synch, %d < %d", id, JFR_LOG_TAG_SET_COUNT);
108 // assert(NULL == log_tag_sets[id].log_tag_enum_ref, "Subscribing twice");
109 // log_tag_sets[id].log_tag_enum_ref = JfrJavaSupport::global_jni_handle(log_tag, THREAD);
110 // if (subscribed_updates) {
111 // LogConfiguration::register_update_listener(&log_config_change);
112 // log_config_change_internal(true, THREAD);
113 // subscribed_updates = false;
114 // } else {
115 // log_config_change_internal(false, THREAD);
116 // }
117 }
118
119 void JfrJavaLog::log(jint tag_set, jint level, jstring message, TRAPS) {
120 DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(THREAD));
121 if (!LogJFR) {
122 return;
123 }
124 if (message == NULL) {
125 return;
126 }
127 // if (level < (jint)LogLevel::First || level > (jint)LogLevel::Last) {
128 // JfrJavaSupport::throw_illegal_argument_exception("LogLevel passed is outside valid range", THREAD);
129 // return;
130 // }
131 // if (tag_set < 0 || tag_set >= (jint)JFR_LOG_TAG_SET_COUNT) {
132 // JfrJavaSupport::throw_illegal_argument_exception("LogTagSet id is outside valid range", THREAD);
133 // return;
134 // }
135 ResourceMark rm(THREAD);
136 const char* const s = JfrJavaSupport::c_str(message, CHECK);
137 assert(s != NULL, "invariant");
138 // assert(log_tag_sets[tag_set].log_tag_set != NULL, "LogTagSet is not init");
139 // log_tag_sets[tag_set].log_tag_set->log((LogLevelType)level, s);
140 tty->print_cr("JFR: %s", s);
141 }