89 template <LogTagType T0, LogTagType T1, LogTagType T2, LogTagType T3, LogTagType T4, LogTagType GuardTag>
90 class LogImpl;
91
92 // Non-template helper class for implementing write-slowpath in cpp
93 class LogWriteHelper : AllStatic {
94 private:
95
96 template <LogTagType T0, LogTagType T1, LogTagType T2, LogTagType T3, LogTagType T4, LogTagType GuardTag>
97 friend class LogImpl;
98
99 ATTRIBUTE_PRINTF(6, 0)
100 static void write_large(LogTagSet& lts,
101 LogLevelType level,
102 const char* prefix,
103 size_t prefix_len,
104 size_t msg_len,
105 const char* fmt,
106 va_list args);
107 };
108
109 template <LogTagType T0, LogTagType T1 = LogTag::__NO_TAG, LogTagType T2 = LogTag::__NO_TAG, LogTagType T3 = LogTag::__NO_TAG,
110 LogTagType T4 = LogTag::__NO_TAG, LogTagType GuardTag = LogTag::__NO_TAG>
111 class LogImpl VALUE_OBJ_CLASS_SPEC {
112 private:
113 static const size_t LogBufferSize = 512;
114 public:
115 // Make sure no more than the maximum number of tags have been given.
116 // The GuardTag allows this to be detected if/when it happens. If the GuardTag
117 // is not __NO_TAG, the number of tags given exceeds the maximum allowed.
118 STATIC_ASSERT(GuardTag == LogTag::__NO_TAG); // Number of logging tags exceeds maximum supported!
119
120 // Empty constructor to avoid warnings on MSVC about unused variables
121 // when the log instance is only used for static functions.
122 LogImpl() {
123 }
124
125 static bool is_level(LogLevelType level) {
126 return LogTagSetMapping<T0, T1, T2, T3, T4>::tagset().is_level(level);
127 }
128
165 #define LOG_LEVEL(level, name) ATTRIBUTE_PRINTF(2, 0) \
166 LogImpl& v##name(const char* fmt, va_list args) { \
167 vwrite(LogLevel::level, fmt, args); \
168 return *this; \
169 } \
170 LogImpl& name(const char* fmt, ...) ATTRIBUTE_PRINTF(2, 3) { \
171 va_list args; \
172 va_start(args, fmt); \
173 vwrite(LogLevel::level, fmt, args); \
174 va_end(args); \
175 return *this; \
176 } \
177 static bool is_##name() { \
178 return is_level(LogLevel::level); \
179 } \
180 static outputStream* name##_stream() { \
181 return new logStream(write<LogLevel::level>); \
182 }
183 LOG_LEVEL_LIST
184 #undef LOG_LEVEL
185 };
186
187 #endif // SHARE_VM_LOGGING_LOG_HPP
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89 template <LogTagType T0, LogTagType T1, LogTagType T2, LogTagType T3, LogTagType T4, LogTagType GuardTag>
90 class LogImpl;
91
92 // Non-template helper class for implementing write-slowpath in cpp
93 class LogWriteHelper : AllStatic {
94 private:
95
96 template <LogTagType T0, LogTagType T1, LogTagType T2, LogTagType T3, LogTagType T4, LogTagType GuardTag>
97 friend class LogImpl;
98
99 ATTRIBUTE_PRINTF(6, 0)
100 static void write_large(LogTagSet& lts,
101 LogLevelType level,
102 const char* prefix,
103 size_t prefix_len,
104 size_t msg_len,
105 const char* fmt,
106 va_list args);
107 };
108
109 //
110 // Log class that embeds both log tags and a log level.
111 //
112 // The class provides a way to write the tags and log level once,
113 // so that redundant specification of tags or levels can be avoided.
114 //
115 // Example usage:
116 // LogTarget(Debug, gc) out;
117 // if (out.is_enabled()) {
118 // ...
119 // out.print("Worker: %u", i);
120 // out.print(" data: %d", x);
121 // ...
122 // print_stats(out.stream());
123 // }
124 //
125 #define LogTarget(level, ...) LogTargetImpl<LogLevel::level, LOG_TAGS(__VA_ARGS__)>
126
127 template <LogTagType T0, LogTagType T1 = LogTag::__NO_TAG, LogTagType T2 = LogTag::__NO_TAG, LogTagType T3 = LogTag::__NO_TAG,
128 LogTagType T4 = LogTag::__NO_TAG, LogTagType GuardTag = LogTag::__NO_TAG>
129 class LogImpl VALUE_OBJ_CLASS_SPEC {
130 private:
131 static const size_t LogBufferSize = 512;
132 public:
133 // Make sure no more than the maximum number of tags have been given.
134 // The GuardTag allows this to be detected if/when it happens. If the GuardTag
135 // is not __NO_TAG, the number of tags given exceeds the maximum allowed.
136 STATIC_ASSERT(GuardTag == LogTag::__NO_TAG); // Number of logging tags exceeds maximum supported!
137
138 // Empty constructor to avoid warnings on MSVC about unused variables
139 // when the log instance is only used for static functions.
140 LogImpl() {
141 }
142
143 static bool is_level(LogLevelType level) {
144 return LogTagSetMapping<T0, T1, T2, T3, T4>::tagset().is_level(level);
145 }
146
183 #define LOG_LEVEL(level, name) ATTRIBUTE_PRINTF(2, 0) \
184 LogImpl& v##name(const char* fmt, va_list args) { \
185 vwrite(LogLevel::level, fmt, args); \
186 return *this; \
187 } \
188 LogImpl& name(const char* fmt, ...) ATTRIBUTE_PRINTF(2, 3) { \
189 va_list args; \
190 va_start(args, fmt); \
191 vwrite(LogLevel::level, fmt, args); \
192 va_end(args); \
193 return *this; \
194 } \
195 static bool is_##name() { \
196 return is_level(LogLevel::level); \
197 } \
198 static outputStream* name##_stream() { \
199 return new logStream(write<LogLevel::level>); \
200 }
201 LOG_LEVEL_LIST
202 #undef LOG_LEVEL
203 };
204
205 // Combines logging tags and a logging level.
206 template <LogLevelType level, LogTagType T0, LogTagType T1 = LogTag::__NO_TAG, LogTagType T2 = LogTag::__NO_TAG,
207 LogTagType T3 = LogTag::__NO_TAG, LogTagType T4 = LogTag::__NO_TAG, LogTagType GuardTag = LogTag::__NO_TAG>
208 class LogTargetImpl {
209 public:
210 // Empty constructor to avoid warnings on MSVC about unused variables
211 // when the log instance is only used for static functions.
212 LogTargetImpl() {
213 }
214
215 static bool is_enabled() {
216 return LogImpl<T0, T1, T2, T3, T4, GuardTag>::is_level(level);
217 }
218
219 static void print(const char* fmt, ...) ATTRIBUTE_PRINTF(1, 2) {
220 va_list args;
221 va_start(args, fmt);
222 LogImpl<T0, T1, T2, T3, T4, GuardTag>::vwrite(level, fmt, args);
223 va_end(args);
224 }
225
226 static outputStream* stream() {
227 return new logStream(&LogImpl<T0, T1, T2, T3, T4, GuardTag>::template write<level>);
228 }
229 };
230
231 #endif // SHARE_VM_LOGGING_LOG_HPP
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