1 /*
2 * Copyright (c) 2015, 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 #ifndef SHARE_VM_LOGGING_LOGTAG_HPP
25 #define SHARE_VM_LOGGING_LOGTAG_HPP
26
27 #include "memory/allocation.hpp"
28 #include "utilities/globalDefinitions.hpp"
29
30 // List of available logging tags. New tags should be added here.
31 // (The tags 'all', 'disable' and 'help' are special tags that can
32 // not be used in log calls, and should not be listed below.)
33 #define LOG_TAG_LIST \
34 LOG_TAG(alloc) \
35 LOG_TAG(age) \
36 LOG_TAG(barrier) \
37 LOG_TAG(bot) \
38 LOG_TAG(census) \
39 LOG_TAG(classhisto) \
40 LOG_TAG(classresolve) \
41 LOG_TAG(classinit) \
42 LOG_TAG(classload) /* Trace all classes loaded */ \
43 LOG_TAG(classloaderdata) /* class loader loader_data lifetime */ \
44 LOG_TAG(classunload) /* Trace unloading of classes */ \
45 LOG_TAG(classpath) \
46 LOG_TAG(compaction) \
47 LOG_TAG(cpu) \
48 LOG_TAG(cset) \
49 LOG_TAG(defaultmethods) \
50 LOG_TAG(ergo) \
51 LOG_TAG(exceptions) \
52 LOG_TAG(exit) \
53 LOG_TAG(freelist) \
54 LOG_TAG(gc) \
55 LOG_TAG(heap) \
56 LOG_TAG(humongous) \
57 LOG_TAG(ihop) \
58 LOG_TAG(itables) \
59 LOG_TAG(jni) \
60 LOG_TAG(liveness) \
61 LOG_TAG(logging) \
62 LOG_TAG(marking) \
63 LOG_TAG(metaspace) \
64 LOG_TAG(monitorinflation) \
65 LOG_TAG(os) \
66 LOG_TAG(phases) \
67 LOG_TAG(plab) \
68 LOG_TAG(promotion) \
69 LOG_TAG(ref) \
70 LOG_TAG(refine) \
71 LOG_TAG(region) \
72 LOG_TAG(remset) \
73 LOG_TAG(safepoint) \
74 LOG_TAG(scavenge) \
75 LOG_TAG(scrub) \
76 LOG_TAG(start) \
77 LOG_TAG(state) \
78 LOG_TAG(stats) \
79 LOG_TAG(stringdedup) \
80 LOG_TAG(survivor) \
81 LOG_TAG(sweep) \
82 LOG_TAG(task) \
83 LOG_TAG(tlab) \
84 LOG_TAG(time) \
85 LOG_TAG(verify) \
86 LOG_TAG(vmoperation) \
87 LOG_TAG(vtables)
88
89 #define PREFIX_LOG_TAG(T) (LogTag::_##T)
90
91 // Expand a set of log tags to their prefixed names.
92 // For error detection purposes, the macro passes one more tag than what is supported.
93 // If too many tags are given, a static assert in the log class will fail.
94 #define LOG_TAGS_EXPANDED(T0, T1, T2, T3, T4, T5, ...) PREFIX_LOG_TAG(T0), PREFIX_LOG_TAG(T1), PREFIX_LOG_TAG(T2), \
95 PREFIX_LOG_TAG(T3), PREFIX_LOG_TAG(T4), PREFIX_LOG_TAG(T5)
96 // The EXPAND_VARARGS macro is required for MSVC, or it will resolve the LOG_TAGS_EXPANDED macro incorrectly.
97 #define EXPAND_VARARGS(x) x
98 #define LOG_TAGS(...) EXPAND_VARARGS(LOG_TAGS_EXPANDED(__VA_ARGS__, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG, _NO_TAG))
99
100 // Log tags are used to classify log messages.
101 // Each log message can be assigned between 1 to LogTag::MaxTags number of tags.
102 // Specifying multiple tags for a log message means that only outputs configured
103 // for those exact tags, or a subset of the tags with a wildcard, will see the logging.
104 // Multiple tags should be comma separated, e.g. log_error(tag1, tag2)("msg").
105 class LogTag : public AllStatic {
106 public:
107 // The maximum number of tags that a single log message can have.
108 // E.g. there might be hundreds of different tags available,
109 // but a specific log message can only be tagged with up to MaxTags of those.
110 static const size_t MaxTags = 5;
111
112 enum type {
113 __NO_TAG,
114 #define LOG_TAG(name) _##name,
115 LOG_TAG_LIST
116 #undef LOG_TAG
117 Count
118 };
119
120 static const char* name(LogTag::type tag) {
121 return _name[tag];
122 }
123
124 static LogTag::type from_string(const char *str);
125
126 private:
127 static const char* _name[];
128 };
129
130 typedef LogTag::type LogTagType;
131
132 #endif // SHARE_VM_LOGGING_LOGTAG_HPP