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_LOGPREFIX_HPP
25 #define SHARE_VM_LOGGING_LOGPREFIX_HPP
26 #include "gc/shared/gcId.hpp"
27 #include "logging/logTag.hpp"
28
29 // Prefixes prepend each log message for a specified tagset with the given prefix.
30 // A prefix consists of a format string and a value or callback. Prefixes are added
31 // after the decorations but before the log message.
32 //
33 // List of prefixes for specific tags and/or tagsets.
34 // Syntax: LOG_PREFIX(<printf format>, <value/callback for value>, LOG_TAGS(<chosen log tags>))
35 #define LOG_PREFIX_LIST // Currently unused/empty
36
37 // The empty prefix, used when there's no prefix defined.
38 template <LogTagType T0, LogTagType T1, LogTagType T2, LogTagType T3, LogTagType T4, LogTagType GuardTag = LogTag::__NO_TAG>
39 struct LogPrefix {
40 STATIC_ASSERT(GuardTag == LogTag::__NO_TAG);
41 static size_t prefix(char* buf, size_t len) {
42 return 0;
43 }
44 };
45
46 #define LOG_PREFIX(fmt, fn, ...) \
47 template <> struct LogPrefix<__VA_ARGS__> { \
48 static size_t prefix(char* buf, size_t len) { \
49 int ret = jio_snprintf(buf, len, fmt, fn); \
50 assert(ret >= 0, \
51 err_msg("Failed to prefix log message using prefix ('%s', '%s'), log buffer too small?", fmt, #fn)); \
52 return ret; \
53 } \
54 };
55 LOG_PREFIX_LIST
56 #undef LOG_PREFIX
57
58 #endif
|
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_LOGPREFIX_HPP
25 #define SHARE_VM_LOGGING_LOGPREFIX_HPP
26
27 #include "gc/shared/gcId.hpp"
28 #include "logging/logTag.hpp"
29
30 // Prefixes prepend each log message for a specified tagset with the given prefix.
31 // A prefix consists of a format string and a value or callback. Prefixes are added
32 // after the decorations but before the log message.
33 //
34 // List of prefixes for specific tags and/or tagsets.
35 // Syntax: LOG_PREFIX(<printf format>, <value/callback for value>, LOG_TAGS(<chosen log tags>))
36 #define LOG_PREFIX_LIST // Currently unused/empty
37
38 // The empty prefix, used when there's no prefix defined.
39 template <LogTagType T0, LogTagType T1, LogTagType T2, LogTagType T3, LogTagType T4, LogTagType GuardTag = LogTag::__NO_TAG>
40 struct LogPrefix : public AllStatic {
41 STATIC_ASSERT(GuardTag == LogTag::__NO_TAG);
42 static size_t prefix(char* buf, size_t len) {
43 return 0;
44 }
45 };
46
47 #define LOG_PREFIX(fmt, fn, ...) \
48 template <> struct LogPrefix<__VA_ARGS__> { \
49 static size_t prefix(char* buf, size_t len) { \
50 int ret = jio_snprintf(buf, len, fmt, fn); \
51 assert(ret >= 0, \
52 err_msg("Failed to prefix log message using prefix ('%s', '%s'), log buffer too small?", fmt, #fn)); \
53 return ret; \
54 } \
55 };
56 LOG_PREFIX_LIST
57 #undef LOG_PREFIX
58
59 #endif // SHARE_VM_LOGGING_LOGPREFIX_HPP
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