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Fix: global logging symbols defined multiple times
[babeltrace.git] / logging / log.c
CommitLineData
beb0fb75
PP		 1/*
2 * This is zf_log.c, modified with Babeltrace prefixes.
3 * See <https://github.com/wonder-mice/zf_log/>.
4 * See LICENSE.
5 */
6
7#include <babeltrace/babeltrace-internal.h>
557d8f39 8#include <babeltrace/common-internal.h>
c0c0c8b4 9#include <pthread.h>
beb0fb75 10
f61ad754
MJ		 11#ifdef __CYGWIN__
12extern unsigned long pthread_getsequence_np(pthread_t *);
13#endif
14
beb0fb75
PP		 15/* When defined, Android log (android/log.h) will be used by default instead of
16 * stderr (ignored on non-Android platforms). Date, time, pid and tid (context)
17 * will be provided by Android log. Android log features will be used to output
18 * log level and tag.
19 */
20#ifdef BT_LOG_USE_ANDROID_LOG
21 #undef BT_LOG_USE_ANDROID_LOG
22 #if defined(__ANDROID__)
23 #define BT_LOG_USE_ANDROID_LOG 1
24 #else
25 #define BT_LOG_USE_ANDROID_LOG 0
26 #endif
27#else
28 #define BT_LOG_USE_ANDROID_LOG 0
29#endif
30/* When defined, NSLog (uses Apple System Log) will be used instead of stderr
31 * (ignored on non-Apple platforms). Date, time, pid and tid (context) will be
32 * provided by NSLog. Curiously, doesn't use NSLog() directly, but piggybacks on
33 * non-public CFLog() function. Both use Apple System Log internally, but it's
34 * easier to call CFLog() from C than NSLog(). Current implementation doesn't
35 * support "%@" format specifier.
36 */
37#ifdef BT_LOG_USE_NSLOG
38 #undef BT_LOG_USE_NSLOG
39 #if defined(__APPLE__) && defined(__MACH__)
40 #define BT_LOG_USE_NSLOG 1
41 #else
42 #define BT_LOG_USE_NSLOG 0
43 #endif
44#else
45 #define BT_LOG_USE_NSLOG 0
46#endif
47/* When defined, OutputDebugString() will be used instead of stderr (ignored on
48 * non-Windows platforms). Uses OutputDebugStringA() variant and feeds it with
49 * UTF-8 data.
50 */
51#ifdef BT_LOG_USE_DEBUGSTRING
52 #undef BT_LOG_USE_DEBUGSTRING
53 #if defined(_WIN32) || defined(_WIN64)
54 #define BT_LOG_USE_DEBUGSTRING 1
55 #else
56 #define BT_LOG_USE_DEBUGSTRING 0
57 #endif
58#else
59 #define BT_LOG_USE_DEBUGSTRING 0
60#endif
61/* When defined, bt_log library will not contain definition of tag prefix
62 * variable. In that case it must be defined elsewhere using
63 * BT_LOG_DEFINE_TAG_PREFIX macro, for example:
64 *
65 * BT_LOG_DEFINE_TAG_PREFIX = "ProcessName";
66 *
67 * This allows to specify custom value for static initialization and avoid
68 * overhead of setting this value in runtime.
69 */
70#ifdef BT_LOG_EXTERN_TAG_PREFIX
71 #undef BT_LOG_EXTERN_TAG_PREFIX
72 #define BT_LOG_EXTERN_TAG_PREFIX 1
73#else
74 #define BT_LOG_EXTERN_TAG_PREFIX 0
75#endif
76/* When defined, bt_log library will not contain definition of global format
77 * variable. In that case it must be defined elsewhere using
78 * BT_LOG_DEFINE_GLOBAL_FORMAT macro, for example:
79 *
80 * BT_LOG_DEFINE_GLOBAL_FORMAT = {MEM_WIDTH};
81 *
82 * This allows to specify custom value for static initialization and avoid
83 * overhead of setting this value in runtime.
84 */
85#ifdef BT_LOG_EXTERN_GLOBAL_FORMAT
86 #undef BT_LOG_EXTERN_GLOBAL_FORMAT
87 #define BT_LOG_EXTERN_GLOBAL_FORMAT 1
88#else
89 #define BT_LOG_EXTERN_GLOBAL_FORMAT 0
90#endif
91/* When defined, bt_log library will not contain definition of global output
92 * variable. In that case it must be defined elsewhere using
93 * BT_LOG_DEFINE_GLOBAL_OUTPUT macro, for example:
94 *
95 * BT_LOG_DEFINE_GLOBAL_OUTPUT = {BT_LOG_PUT_STD, custom_output_callback};
96 *
97 * This allows to specify custom value for static initialization and avoid
98 * overhead of setting this value in runtime.
99 */
100#ifdef BT_LOG_EXTERN_GLOBAL_OUTPUT
101 #undef BT_LOG_EXTERN_GLOBAL_OUTPUT
102 #define BT_LOG_EXTERN_GLOBAL_OUTPUT 1
103#else
104 #define BT_LOG_EXTERN_GLOBAL_OUTPUT 0
105#endif
106/* When defined, bt_log library will not contain definition of global output
107 * level variable. In that case it must be defined elsewhere using
108 * BT_LOG_DEFINE_GLOBAL_OUTPUT_LEVEL macro, for example:
109 *
110 * BT_LOG_DEFINE_GLOBAL_OUTPUT_LEVEL = BT_LOG_WARN;
111 *
112 * This allows to specify custom value for static initialization and avoid
113 * overhead of setting this value in runtime.
114 */
115#ifdef BT_LOG_EXTERN_GLOBAL_OUTPUT_LEVEL
116 #undef BT_LOG_EXTERN_GLOBAL_OUTPUT_LEVEL
117 #define BT_LOG_EXTERN_GLOBAL_OUTPUT_LEVEL 1
118#else
119 #define BT_LOG_EXTERN_GLOBAL_OUTPUT_LEVEL 0
120#endif
121/* When defined, implementation will prefer smaller code size over speed.
122 * Very rough estimate is that code will be up to 2x smaller and up to 2x
123 * slower. Disabled by default.
124 */
125#ifdef BT_LOG_OPTIMIZE_SIZE
126 #undef BT_LOG_OPTIMIZE_SIZE
127 #define BT_LOG_OPTIMIZE_SIZE 1
128#else
129 #define BT_LOG_OPTIMIZE_SIZE 0
130#endif
131/* Size of the log line buffer. The buffer is allocated on stack. It limits
132 * maximum length of a log line.
133 */
134#ifndef BT_LOG_BUF_SZ
135 #define BT_LOG_BUF_SZ 512
136#endif
137/* Default number of bytes in one line of memory output. For large values
138 * BT_LOG_BUF_SZ also must be increased.
139 */
140#ifndef BT_LOG_MEM_WIDTH
141 #define BT_LOG_MEM_WIDTH 32
142#endif
143/* String to put in the end of each log line (can be empty). Its value used by
144 * stderr output callback. Its size used as a default value for BT_LOG_EOL_SZ.
145 */
146#ifndef BT_LOG_EOL
147 #define BT_LOG_EOL "\n"
148#endif
149/* Default delimiter that separates parts of log message. Can NOT contain '%'
150 * or '\0'.
151 *
152 * Log message format specifications can override (or ignore) this value. For
153 * more details see BT_LOG_MESSAGE_CTX_FORMAT, BT_LOG_MESSAGE_SRC_FORMAT and
154 * BT_LOG_MESSAGE_TAG_FORMAT.
155 */
156#ifndef BT_LOG_DEF_DELIMITER
157 #define BT_LOG_DEF_DELIMITER " "
158#endif
159/* Specifies log message context format. Log message context includes date,
160 * time, process id, thread id and message's log level. Custom information can
161 * be added as well. Supported fields: YEAR, MONTH, DAY, HOUR, MINUTE, SECOND,
162 * MILLISECOND, PID, TID, LEVEL, S(str), F_INIT(statements),
163 * F_UINT(width, value).
164 *
165 * Must be defined as a tuple, for example:
166 *
167 * #define BT_LOG_MESSAGE_CTX_FORMAT (YEAR, S("."), MONTH, S("."), DAY, S(" > "))
168 *
169 * In that case, resulting log message will be:
170 *
171 * 2016.12.22 > TAG function@filename.c:line Message text
172 *
173 * Note, that tag, source location and message text are not impacted by
174 * this setting. See BT_LOG_MESSAGE_TAG_FORMAT and BT_LOG_MESSAGE_SRC_FORMAT.
175 *
176 * If message context must be visually separated from the rest of the message,
177 * it must be reflected in context format (notice trailing S(" > ") in the
178 * example above).
179 *
180 * S(str) adds constant string str. String can NOT contain '%' or '\0'.
181 *
182 * F_INIT(statements) adds initialization statement(s) that will be evaluated
183 * once for each log message. All statements are evaluated in specified order.
184 * Several F_INIT() fields can be used in every log message format
185 * specification. Fields, like F_UINT(width, value), are allowed to use results
186 * of initialization statements. If statement introduces variables (or other
187 * names, like structures) they must be prefixed with "f_". Statements must be
188 * enclosed into additional "()". Example:
189 *
190 * #define BT_LOG_MESSAGE_CTX_FORMAT \
191 * (F_INIT(( struct rusage f_ru; getrusage(RUSAGE_SELF, &f_ru); )), \
192 * YEAR, S("."), MONTH, S("."), DAY, S(" "), \
193 * F_UINT(5, f_ru.ru_nsignals), \
194 * S(" "))
195 *
196 * F_UINT(width, value) adds unsigned integer value extended with up to width
197 * spaces (for alignment purposes). Value can be any expression that evaluates
198 * to unsigned integer. If expression contains non-standard functions, they
199 * must be declared with F_INIT(). Example:
200 *
201 * #define BT_LOG_MESSAGE_CTX_FORMAT \
202 * (YEAR, S("."), MONTH, S("."), DAY, S(" "), \
203 * F_INIT(( unsigned tickcount(); )), \
204 * F_UINT(5, tickcount()), \
205 * S(" "))
206 *
207 * Other log message format specifications follow same rules, but have a
208 * different set of supported fields.
209 */
210#ifndef BT_LOG_MESSAGE_CTX_FORMAT
211 #define BT_LOG_MESSAGE_CTX_FORMAT \
212 (MONTH, S("-"), DAY, S(BT_LOG_DEF_DELIMITER), \
213 HOUR, S(":"), MINUTE, S(":"), SECOND, S("."), MILLISECOND, S(BT_LOG_DEF_DELIMITER), \
214 PID, S(BT_LOG_DEF_DELIMITER), TID, S(BT_LOG_DEF_DELIMITER), \
215 LEVEL, S(BT_LOG_DEF_DELIMITER))
216#endif
217/* Example:
218 */
219/* Specifies log message tag format. It includes tag prefix and tag. Custom
220 * information can be added as well. Supported fields:
221 * TAG(prefix_delimiter, tag_delimiter), S(str), F_INIT(statements),
222 * F_UINT(width, value).
223 *
224 * TAG(prefix_delimiter, tag_delimiter) adds following string to log message:
225 *
226 * PREFIX<prefix_delimiter>TAG<tag_delimiter>
227 *
228 * Prefix delimiter will be used only when prefix is not empty. Tag delimiter
229 * will be used only when prefixed tag is not empty. Example:
230 *
231 * #define BT_LOG_TAG_FORMAT (S("["), TAG(".", ""), S("] "))
232 *
233 * See BT_LOG_MESSAGE_CTX_FORMAT for details.
234 */
235#ifndef BT_LOG_MESSAGE_TAG_FORMAT
236 #define BT_LOG_MESSAGE_TAG_FORMAT \
237 (TAG(".", BT_LOG_DEF_DELIMITER))
238#endif
239/* Specifies log message source location format. It includes function name,
240 * file name and file line. Custom information can be added as well. Supported
241 * fields: FUNCTION, FILENAME, FILELINE, S(str), F_INIT(statements),
242 * F_UINT(width, value).
243 *
244 * See BT_LOG_MESSAGE_CTX_FORMAT for details.
245 */
246#ifndef BT_LOG_MESSAGE_SRC_FORMAT
247 #define BT_LOG_MESSAGE_SRC_FORMAT \
248 (FUNCTION, S("@"), FILENAME, S(":"), FILELINE, S(BT_LOG_DEF_DELIMITER))
249#endif
250/* Fields that can be used in log message format specifications (see above).
251 * Mentioning them here explicitly, so we know that nobody else defined them
252 * before us. See BT_LOG_MESSAGE_CTX_FORMAT for details.
253 */
254#define YEAR YEAR
255#define MONTH MONTH
256#define DAY DAY
257#define MINUTE MINUTE
258#define SECOND SECOND
259#define MILLISECOND MILLISECOND
260#define PID PID
261#define TID TID
262#define LEVEL LEVEL
263#define TAG(prefix_delim, tag_delim) TAG(prefix_delim, tag_delim)
264#define FUNCTION FUNCTION
265#define FILENAME FILENAME
266#define FILELINE FILELINE
267#define S(str) S(str)
268#define F_INIT(statements) F_INIT(statements)
269#define F_UINT(width, value) F_UINT(width, value)
270/* Number of bytes to reserve for EOL in the log line buffer (must be >0).
271 * Must be larger than or equal to length of BT_LOG_EOL with terminating null.
272 */
273#ifndef BT_LOG_EOL_SZ
274 #define BT_LOG_EOL_SZ sizeof(BT_LOG_EOL)
275#endif
276/* Compile instrumented version of the library to facilitate unit testing.
277 */
278#ifndef BT_LOG_INSTRUMENTED
279 #define BT_LOG_INSTRUMENTED 0
280#endif
281
282#if defined(__linux__)
283 #if !defined(__ANDROID__) && !defined(_GNU_SOURCE)
284 #define _GNU_SOURCE
285 #endif
286#endif
287#if defined(__MINGW32__)
288 #ifdef __STRICT_ANSI__
289 #undef __STRICT_ANSI__
290 #endif
291#endif
292#include <assert.h>
293#include <ctype.h>
294#include <string.h>
295#include <time.h>
296#include <stdarg.h>
297#include <stddef.h>
298#include <stdlib.h>
299#include <stdio.h>
00a52b39
PP		 300
301#define BT_LOG_OUTPUT_LEVEL dummy
302
beb0fb75
PP		 303#include <babeltrace/logging-internal.h>
304#include <babeltrace/logging.h>
305
306#if defined(_WIN32) || defined(_WIN64)
307 #include <windows.h>
308#else
309 #include <unistd.h>
310 #include <sys/time.h>
311 #if defined(__linux__)
312 #include <linux/limits.h>
94ddf5ca
MJ		 313 #elif (defined(__sun__) || defined(__CYGWIN__))
314 /* Solaris and Cygwin have no sys/syslimits.h */
beb0fb75
PP		 315 #else
316 #include <sys/syslimits.h>
317 #endif
318#endif
319
320#if defined(__linux__)
321 #include <sys/prctl.h>
322 #include <sys/types.h>
323 #if !defined(__ANDROID__)
324 #include <sys/syscall.h>
325 #endif
326#endif
327#if defined(__MACH__)
328 #include <pthread.h>
329#endif
330
331#define INLINE _BT_LOG_INLINE
332#define VAR_UNUSED(var) (void)var
333#define RETVAL_UNUSED(expr) do { while(expr) break; } while(0)
334#define STATIC_ASSERT(name, cond) \
335 typedef char assert_##name[(cond)? 1: -1]
336#define ASSERT_UNREACHABLE(why) assert(!sizeof(why))
337#ifndef _countof
338 #define _countof(xs) (sizeof(xs) / sizeof((xs)[0]))
339#endif
340
341#if BT_LOG_INSTRUMENTED
342 #define INSTRUMENTED_CONST
343#else
344 #define INSTRUMENTED_CONST const
345#endif
346
347#define _PP_PASTE_2(a, b) a ## b
348#define _PP_CONCAT_2(a, b) _PP_PASTE_2(a, b)
349
350#define _PP_PASTE_3(a, b, c) a ## b ## c
351#define _PP_CONCAT_3(a, b, c) _PP_PASTE_3(a, b, c)
352
353/* Microsoft C preprocessor is a piece of shit. This moron treats __VA_ARGS__
354 * as a single token and requires additional expansion to realize that it's
355 * actually a list. If not for it, there would be no need in this extra
356 * expansion.
357 */
358#define _PP_ID(x) x
359#define _PP_NARGS_N(_0,_1,_2,_3,_4,_5,_6,_7,_8,_9,_10,_11,_12,_13,_14,_15,_16,_17,_18,_19,_20,_21,_22,_23,_24,...) _24
360#define _PP_NARGS(...) _PP_ID(_PP_NARGS_N(__VA_ARGS__,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0))
361
362/* There is a more efficient way to implement this, but it requires
363 * working C preprocessor. Unfortunately, Microsoft Visual Studio doesn't
364 * have one.
365 */
366#define _PP_HEAD__(x, ...) x
367#define _PP_HEAD_(...) _PP_ID(_PP_HEAD__(__VA_ARGS__, ~))
368#define _PP_HEAD(xs) _PP_HEAD_ xs
369#define _PP_TAIL_(x, ...) (__VA_ARGS__)
370#define _PP_TAIL(xs) _PP_TAIL_ xs
371#define _PP_UNTUPLE_(...) __VA_ARGS__
372#define _PP_UNTUPLE(xs) _PP_UNTUPLE_ xs
373
374/* Apply function macro to each element in tuple. Output is not
375 * enforced to be a tuple.
376 */
377#define _PP_MAP_1(f, xs) f(_PP_HEAD(xs))
378#define _PP_MAP_2(f, xs) f(_PP_HEAD(xs)) _PP_MAP_1(f, _PP_TAIL(xs))
379#define _PP_MAP_3(f, xs) f(_PP_HEAD(xs)) _PP_MAP_2(f, _PP_TAIL(xs))
380#define _PP_MAP_4(f, xs) f(_PP_HEAD(xs)) _PP_MAP_3(f, _PP_TAIL(xs))
381#define _PP_MAP_5(f, xs) f(_PP_HEAD(xs)) _PP_MAP_4(f, _PP_TAIL(xs))
382#define _PP_MAP_6(f, xs) f(_PP_HEAD(xs)) _PP_MAP_5(f, _PP_TAIL(xs))
383#define _PP_MAP_7(f, xs) f(_PP_HEAD(xs)) _PP_MAP_6(f, _PP_TAIL(xs))
384#define _PP_MAP_8(f, xs) f(_PP_HEAD(xs)) _PP_MAP_7(f, _PP_TAIL(xs))
385#define _PP_MAP_9(f, xs) f(_PP_HEAD(xs)) _PP_MAP_8(f, _PP_TAIL(xs))
386#define _PP_MAP_10(f, xs) f(_PP_HEAD(xs)) _PP_MAP_9(f, _PP_TAIL(xs))
387#define _PP_MAP_11(f, xs) f(_PP_HEAD(xs)) _PP_MAP_10(f, _PP_TAIL(xs))
388#define _PP_MAP_12(f, xs) f(_PP_HEAD(xs)) _PP_MAP_11(f, _PP_TAIL(xs))
389#define _PP_MAP_13(f, xs) f(_PP_HEAD(xs)) _PP_MAP_12(f, _PP_TAIL(xs))
390#define _PP_MAP_14(f, xs) f(_PP_HEAD(xs)) _PP_MAP_13(f, _PP_TAIL(xs))
391#define _PP_MAP_15(f, xs) f(_PP_HEAD(xs)) _PP_MAP_14(f, _PP_TAIL(xs))
392#define _PP_MAP_16(f, xs) f(_PP_HEAD(xs)) _PP_MAP_15(f, _PP_TAIL(xs))
393#define _PP_MAP_17(f, xs) f(_PP_HEAD(xs)) _PP_MAP_16(f, _PP_TAIL(xs))
394#define _PP_MAP_18(f, xs) f(_PP_HEAD(xs)) _PP_MAP_17(f, _PP_TAIL(xs))
395#define _PP_MAP_19(f, xs) f(_PP_HEAD(xs)) _PP_MAP_18(f, _PP_TAIL(xs))
396#define _PP_MAP_20(f, xs) f(_PP_HEAD(xs)) _PP_MAP_19(f, _PP_TAIL(xs))
397#define _PP_MAP_21(f, xs) f(_PP_HEAD(xs)) _PP_MAP_20(f, _PP_TAIL(xs))
398#define _PP_MAP_22(f, xs) f(_PP_HEAD(xs)) _PP_MAP_21(f, _PP_TAIL(xs))
399#define _PP_MAP_23(f, xs) f(_PP_HEAD(xs)) _PP_MAP_22(f, _PP_TAIL(xs))
400#define _PP_MAP_24(f, xs) f(_PP_HEAD(xs)) _PP_MAP_23(f, _PP_TAIL(xs))
401#define _PP_MAP(f, xs) _PP_CONCAT_2(_PP_MAP_, _PP_NARGS xs) (f, xs)
402
403/* Apply function macro to each element in tuple in reverse order.
404 * Output is not enforced to be a tuple.
405 */
406#define _PP_RMAP_1(f, xs) f(_PP_HEAD(xs))
407#define _PP_RMAP_2(f, xs) _PP_RMAP_1(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
408#define _PP_RMAP_3(f, xs) _PP_RMAP_2(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
409#define _PP_RMAP_4(f, xs) _PP_RMAP_3(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
410#define _PP_RMAP_5(f, xs) _PP_RMAP_4(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
411#define _PP_RMAP_6(f, xs) _PP_RMAP_5(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
412#define _PP_RMAP_7(f, xs) _PP_RMAP_6(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
413#define _PP_RMAP_8(f, xs) _PP_RMAP_7(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
414#define _PP_RMAP_9(f, xs) _PP_RMAP_8(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
415#define _PP_RMAP_10(f, xs) _PP_RMAP_9(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
416#define _PP_RMAP_11(f, xs) _PP_RMAP_10(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
417#define _PP_RMAP_12(f, xs) _PP_RMAP_11(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
418#define _PP_RMAP_13(f, xs) _PP_RMAP_12(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
419#define _PP_RMAP_14(f, xs) _PP_RMAP_13(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
420#define _PP_RMAP_15(f, xs) _PP_RMAP_14(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
421#define _PP_RMAP_16(f, xs) _PP_RMAP_15(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
422#define _PP_RMAP_17(f, xs) _PP_RMAP_16(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
423#define _PP_RMAP_18(f, xs) _PP_RMAP_17(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
424#define _PP_RMAP_19(f, xs) _PP_RMAP_18(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
425#define _PP_RMAP_20(f, xs) _PP_RMAP_19(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
426#define _PP_RMAP_21(f, xs) _PP_RMAP_20(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
427#define _PP_RMAP_22(f, xs) _PP_RMAP_21(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
428#define _PP_RMAP_23(f, xs) _PP_RMAP_22(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
429#define _PP_RMAP_24(f, xs) _PP_RMAP_23(f, _PP_TAIL(xs)) f(_PP_HEAD(xs))
430#define _PP_RMAP(f, xs) _PP_CONCAT_2(_PP_RMAP_, _PP_NARGS xs) (f, xs)
431
432/* Used to implement _BT_LOG_MESSAGE_FORMAT_CONTAINS() macro. All possible
433 * fields must be mentioned here. Not counting F_INIT() here because it's
434 * somewhat special and is handled spearatly (at least for now).
435 */
436#define _BT_LOG_MESSAGE_FORMAT_MASK__ (0<<0)
437#define _BT_LOG_MESSAGE_FORMAT_MASK__YEAR (1<<1)
438#define _BT_LOG_MESSAGE_FORMAT_MASK__MONTH (1<<2)
439#define _BT_LOG_MESSAGE_FORMAT_MASK__DAY (1<<3)
440#define _BT_LOG_MESSAGE_FORMAT_MASK__HOUR (1<<4)
441#define _BT_LOG_MESSAGE_FORMAT_MASK__MINUTE (1<<5)
442#define _BT_LOG_MESSAGE_FORMAT_MASK__SECOND (1<<6)
443#define _BT_LOG_MESSAGE_FORMAT_MASK__MILLISECOND (1<<7)
444#define _BT_LOG_MESSAGE_FORMAT_MASK__PID (1<<8)
445#define _BT_LOG_MESSAGE_FORMAT_MASK__TID (1<<9)
446#define _BT_LOG_MESSAGE_FORMAT_MASK__LEVEL (1<<10)
447#define _BT_LOG_MESSAGE_FORMAT_MASK__TAG(ps, ts) (1<<11)
448#define _BT_LOG_MESSAGE_FORMAT_MASK__FUNCTION (1<<12)
449#define _BT_LOG_MESSAGE_FORMAT_MASK__FILENAME (1<<13)
450#define _BT_LOG_MESSAGE_FORMAT_MASK__FILELINE (1<<14)
451#define _BT_LOG_MESSAGE_FORMAT_MASK__S(s) (1<<15)
452#define _BT_LOG_MESSAGE_FORMAT_MASK__F_INIT(expr) (0<<16)
453#define _BT_LOG_MESSAGE_FORMAT_MASK__F_UINT(w, v) (1<<17)
454#define _BT_LOG_MESSAGE_FORMAT_MASK(field) \
455 _PP_CONCAT_3(_BT_LOG_MESSAGE_FORMAT_MASK_, _, field)
456
457/* Logical "or" of masks of fields used in specified format specification.
458 */
459#define _BT_LOG_MESSAGE_FORMAT_FIELDS(format) \
460 (0 _PP_MAP(| _BT_LOG_MESSAGE_FORMAT_MASK, format))
461
462/* Expands to expressions that evaluates to true if field is used in
463 * specified format specification. Example:
464 *
465 * #if _BT_LOG_MESSAGE_FORMAT_CONTAINS(F_UINT, BT_LOG_MESSAGE_CTX_FORMAT)
466 * ...
467 * #endif
468 */
469#define _BT_LOG_MESSAGE_FORMAT_CONTAINS(field, format) \
470 (_BT_LOG_MESSAGE_FORMAT_MASK(field) & _BT_LOG_MESSAGE_FORMAT_FIELDS(format))
471
472/* Same, but checks all supported format specifications.
473 */
474#define _BT_LOG_MESSAGE_FORMAT_FIELD_USED(field) \
475 (_BT_LOG_MESSAGE_FORMAT_CONTAINS(field, BT_LOG_MESSAGE_CTX_FORMAT) || \
476 _BT_LOG_MESSAGE_FORMAT_CONTAINS(field, BT_LOG_MESSAGE_TAG_FORMAT) || \
477 _BT_LOG_MESSAGE_FORMAT_CONTAINS(field, BT_LOG_MESSAGE_SRC_FORMAT))
478
479#define _BT_LOG_MESSAGE_FORMAT_DATETIME_USED \
480 (_BT_LOG_MESSAGE_FORMAT_CONTAINS(YEAR, BT_LOG_MESSAGE_CTX_FORMAT) || \
481 _BT_LOG_MESSAGE_FORMAT_CONTAINS(MONTH, BT_LOG_MESSAGE_CTX_FORMAT) || \
482 _BT_LOG_MESSAGE_FORMAT_CONTAINS(DAY, BT_LOG_MESSAGE_CTX_FORMAT) || \
483 _BT_LOG_MESSAGE_FORMAT_CONTAINS(HOUR, BT_LOG_MESSAGE_CTX_FORMAT) || \
484 _BT_LOG_MESSAGE_FORMAT_CONTAINS(MINUTE, BT_LOG_MESSAGE_CTX_FORMAT) || \
485 _BT_LOG_MESSAGE_FORMAT_CONTAINS(SECOND, BT_LOG_MESSAGE_CTX_FORMAT) || \
486 _BT_LOG_MESSAGE_FORMAT_CONTAINS(MILLISECOND, BT_LOG_MESSAGE_CTX_FORMAT))
487
488#if defined(_MSC_VER) && !defined(__INTEL_COMPILER)
489 #pragma warning(disable:4204) /* nonstandard extension used: non-constant aggregate initializer */
490 #define memccpy _memccpy
491#endif
492
994e8fa3
MJ		 493#if (defined(_MSC_VER) && !defined(__INTEL_COMPILER)) || \
494 (defined(__MINGW64__) && !defined(__USE_MINGW_ANSI_STDIO))
beb0fb75
PP		 495 #define vsnprintf(s, sz, fmt, va) fake_vsnprintf(s, sz, fmt, va)
496 static int fake_vsnprintf(char *s, size_t sz, const char *fmt, va_list ap)
497 {
498 const int n = vsnprintf_s(s, sz, _TRUNCATE, fmt, ap);
499 return 0 < n? n: (int)sz + 1; /* no need in _vscprintf() for now */
500 }
501 #if BT_LOG_OPTIMIZE_SIZE
502 #define snprintf(s, sz, ...) fake_snprintf(s, sz, __VA_ARGS__)
503 static int fake_snprintf(char *s, size_t sz, const char *fmt, ...)
504 {
505 va_list va;
506 va_start(va, fmt);
507 const int n = fake_vsnprintf(s, sz, fmt, va);
508 va_end(va);
509 return n;
510 }
511 #endif
512#endif
513
514typedef void (*time_cb)(struct tm *const tm, unsigned *const usec);
515typedef void (*pid_cb)(int *const pid, int *const tid);
516typedef void (*buffer_cb)(bt_log_message *msg, char *buf);
517
518typedef struct src_location
519{
520 const char *const func;
521 const char *const file;
522 const unsigned line;
523}
524src_location;
525
526typedef struct mem_block
527{
528 const void *const d;
529 const unsigned d_sz;
530}
531mem_block;
532
533static void time_callback(struct tm *const tm, unsigned *const usec);
534static void pid_callback(int *const pid, int *const tid);
535static void buffer_callback(bt_log_message *msg, char *buf);
536
537STATIC_ASSERT(eol_fits_eol_sz, sizeof(BT_LOG_EOL) <= BT_LOG_EOL_SZ);
538STATIC_ASSERT(eol_sz_greater_than_zero, 0 < BT_LOG_EOL_SZ);
539STATIC_ASSERT(eol_sz_less_than_buf_sz, BT_LOG_EOL_SZ < BT_LOG_BUF_SZ);
540#if !defined(_WIN32) && !defined(_WIN64)
541 STATIC_ASSERT(buf_sz_less_than_pipe_buf, BT_LOG_BUF_SZ <= PIPE_BUF);
542#endif
543static const char c_hex[] = "0123456789abcdef";
544
545static INSTRUMENTED_CONST unsigned g_buf_sz = BT_LOG_BUF_SZ - BT_LOG_EOL_SZ;
546static INSTRUMENTED_CONST time_cb g_time_cb = time_callback;
547static INSTRUMENTED_CONST pid_cb g_pid_cb = pid_callback;
548static INSTRUMENTED_CONST buffer_cb g_buffer_cb = buffer_callback;
549
550#if BT_LOG_USE_ANDROID_LOG
551 #include <android/log.h>
552
553 static INLINE int android_lvl(const int lvl)
554 {
555 switch (lvl)
556 {
557 case BT_LOG_VERBOSE:
558 return ANDROID_LOG_VERBOSE;
559 case BT_LOG_DEBUG:
560 return ANDROID_LOG_DEBUG;
561 case BT_LOG_INFO:
562 return ANDROID_LOG_INFO;
563 case BT_LOG_WARN:
564 return ANDROID_LOG_WARN;
565 case BT_LOG_ERROR:
566 return ANDROID_LOG_ERROR;
567 case BT_LOG_FATAL:
568 return ANDROID_LOG_FATAL;
569 default:
570 ASSERT_UNREACHABLE("Bad log level");
571 return ANDROID_LOG_UNKNOWN;
572 }
573 }
574
575 static void out_android_callback(const bt_log_message *const msg, void *arg)
576 {
577 VAR_UNUSED(arg);
578 *msg->p = 0;
579 const char *tag = msg->p;
580 if (msg->tag_e != msg->tag_b)
581 {
582 tag = msg->tag_b;
583 *msg->tag_e = 0;
584 }
585 __android_log_print(android_lvl(msg->lvl), tag, "%s", msg->msg_b);
586 }
587
588 enum { OUT_ANDROID_MASK = BT_LOG_PUT_STD & ~BT_LOG_PUT_CTX };
589 #define OUT_ANDROID OUT_ANDROID_MASK, 0, out_android_callback
590#endif
591
592#if BT_LOG_USE_NSLOG
593 #include <CoreFoundation/CoreFoundation.h>
594 CF_EXPORT void CFLog(int32_t level, CFStringRef format, ...);
595
596 static INLINE int apple_lvl(const int lvl)
597 {
598 switch (lvl)
599 {
600 case BT_LOG_VERBOSE:
601 return 7; /* ASL_LEVEL_DEBUG / kCFLogLevelDebug */;
602 case BT_LOG_DEBUG:
603 return 7; /* ASL_LEVEL_DEBUG / kCFLogLevelDebug */;
604 case BT_LOG_INFO:
605 return 6; /* ASL_LEVEL_INFO / kCFLogLevelInfo */;
606 case BT_LOG_WARN:
607 return 4; /* ASL_LEVEL_WARNING / kCFLogLevelWarning */;
608 case BT_LOG_ERROR:
609 return 3; /* ASL_LEVEL_ERR / kCFLogLevelError */;
610 case BT_LOG_FATAL:
611 return 0; /* ASL_LEVEL_EMERG / kCFLogLevelEmergency */;
612 default:
613 ASSERT_UNREACHABLE("Bad log level");
614 return 0; /* ASL_LEVEL_EMERG / kCFLogLevelEmergency */;
615 }
616 }
617
618 static void out_nslog_callback(const bt_log_message *const msg, void *arg)
619 {
620 VAR_UNUSED(arg);
621 *msg->p = 0;
622 CFLog(apple_lvl(msg->lvl), CFSTR("%s"), msg->tag_b);
623 }
624
625 enum { OUT_NSLOG_MASK = BT_LOG_PUT_STD & ~BT_LOG_PUT_CTX };
626 #define OUT_NSLOG OUT_NSLOG_MASK, 0, out_nslog_callback
627#endif
628
629#if BT_LOG_USE_DEBUGSTRING
630 #include <windows.h>
631
632 static void out_debugstring_callback(const bt_log_message *const msg, void *arg)
633 {
634 VAR_UNUSED(arg);
635 msg->p[0] = '\n';
636 msg->p[1] = '\0';
637 OutputDebugStringA(msg->buf);
638 }
639
640 enum { OUT_DEBUGSTRING_MASK = BT_LOG_PUT_STD };
641 #define OUT_DEBUGSTRING OUT_DEBUGSTRING_MASK, 0, out_debugstring_callback
642#endif
643
644BT_HIDDEN
645void bt_log_out_stderr_callback(const bt_log_message *const msg, void *arg)
646{
647 VAR_UNUSED(arg);
648 const size_t eol_len = sizeof(BT_LOG_EOL) - 1;
649 memcpy(msg->p, BT_LOG_EOL, eol_len);
650#if defined(_WIN32) || defined(_WIN64)
651 /* WriteFile() is atomic for local files opened with FILE_APPEND_DATA and
652 without FILE_WRITE_DATA */
653 WriteFile(GetStdHandle(STD_ERROR_HANDLE), msg->buf,
654 (DWORD)(msg->p - msg->buf + eol_len), 0, 0);
655#else
656 /* write() is atomic for buffers less than or equal to PIPE_BUF. */
657 RETVAL_UNUSED(write(STDERR_FILENO, msg->buf,
658 (size_t)(msg->p - msg->buf) + eol_len));
659#endif
660}
661
662static const bt_log_output out_stderr = {BT_LOG_OUT_STDERR};
663
664#if !BT_LOG_EXTERN_TAG_PREFIX
665 BT_LOG_DEFINE_TAG_PREFIX = 0;
666#endif
667
668#if !BT_LOG_EXTERN_GLOBAL_FORMAT
669 BT_LOG_DEFINE_GLOBAL_FORMAT = {BT_LOG_MEM_WIDTH};
670#endif
671
672#if !BT_LOG_EXTERN_GLOBAL_OUTPUT
673 #if BT_LOG_USE_ANDROID_LOG
674 BT_LOG_DEFINE_GLOBAL_OUTPUT = {OUT_ANDROID};
675 #elif BT_LOG_USE_NSLOG
676 BT_LOG_DEFINE_GLOBAL_OUTPUT = {OUT_NSLOG};
677 #elif BT_LOG_USE_DEBUGSTRING
678 BT_LOG_DEFINE_GLOBAL_OUTPUT = {OUT_DEBUGSTRING};
679 #else
680 BT_LOG_DEFINE_GLOBAL_OUTPUT = {BT_LOG_OUT_STDERR};
681 #endif
682#endif
683
684#if !BT_LOG_EXTERN_GLOBAL_OUTPUT_LEVEL
685 BT_LOG_DEFINE_GLOBAL_OUTPUT_LEVEL = 0;
686#endif
687
4f1c7f2e 688BT_HIDDEN
beb0fb75
PP		 689const bt_log_spec _bt_log_stderr_spec =
690{
691 BT_LOG_GLOBAL_FORMAT,
692 &out_stderr,
693};
694
695static const bt_log_spec global_spec =
696{
697 BT_LOG_GLOBAL_FORMAT,
698 BT_LOG_GLOBAL_OUTPUT,
699};
700
701#if _BT_LOG_MESSAGE_FORMAT_CONTAINS(LEVEL, BT_LOG_MESSAGE_CTX_FORMAT)
702static char lvl_char(const int lvl)
703{
704 switch (lvl)
705 {
706 case BT_LOG_VERBOSE:
707 return 'V';
708 case BT_LOG_DEBUG:
709 return 'D';
710 case BT_LOG_INFO:
711 return 'I';
712 case BT_LOG_WARN:
713 return 'W';
714 case BT_LOG_ERROR:
715 return 'E';
716 case BT_LOG_FATAL:
717 return 'F';
718 default:
719 ASSERT_UNREACHABLE("Bad log level");
720 return '?';
721 }
722}
723#endif
724
725#define GCCVER_LESS(MAJOR, MINOR, PATCH) \
726 (__GNUC__ < MAJOR || \
727 (__GNUC__ == MAJOR && (__GNUC_MINOR__ < MINOR || \
728 (__GNUC_MINOR__ == MINOR && __GNUC_PATCHLEVEL__ < PATCH))))
729
730#if !defined(__clang__) && defined(__GNUC__) && GCCVER_LESS(4,7,0)
731 #define __atomic_load_n(vp, model) __sync_fetch_and_add(vp, 0)
732 #define __atomic_fetch_add(vp, n, model) __sync_fetch_and_add(vp, n)
733 #define __atomic_sub_fetch(vp, n, model) __sync_sub_and_fetch(vp, n)
734 #define __atomic_or_fetch(vp, n, model) __sync_or_and_fetch(vp, n)
735 #define __atomic_and_fetch(vp, n, model) __sync_and_and_fetch(vp, n)
736 /* Note: will not store old value of *vp in *ep (non-standard behaviour) */
737 #define __atomic_compare_exchange_n(vp, ep, d, weak, smodel, fmodel) \
738 __sync_bool_compare_and_swap(vp, *(ep), d)
739#endif
740
741#if !BT_LOG_OPTIMIZE_SIZE && !defined(_WIN32) && !defined(_WIN64)
742#define TCACHE
743#define TCACHE_STALE (0x40000000)
744#define TCACHE_FLUID (0x40000000 | 0x80000000)
745static unsigned g_tcache_mode = TCACHE_STALE;
746static struct timeval g_tcache_tv = {0, 0};
f833fd04 747static struct tm g_tcache_tm = {0};
beb0fb75
PP		 748
749static INLINE int tcache_get(const struct timeval *const tv, struct tm *const tm)
750{
751 unsigned mode;
752 mode = __atomic_load_n(&g_tcache_mode, __ATOMIC_RELAXED);
753 if (0 == (mode & TCACHE_FLUID))
754 {
755 mode = __atomic_fetch_add(&g_tcache_mode, 1, __ATOMIC_ACQUIRE);
756 if (0 == (mode & TCACHE_FLUID))
757 {
758 if (g_tcache_tv.tv_sec == tv->tv_sec)
759 {
760 *tm = g_tcache_tm;
761 __atomic_sub_fetch(&g_tcache_mode, 1, __ATOMIC_RELEASE);
762 return !0;
763 }
764 __atomic_or_fetch(&g_tcache_mode, TCACHE_STALE, __ATOMIC_RELAXED);
765 }
766 __atomic_sub_fetch(&g_tcache_mode, 1, __ATOMIC_RELEASE);
767 }
768 return 0;
769}
770
771static INLINE void tcache_set(const struct timeval *const tv, struct tm *const tm)
772{
773 unsigned stale = TCACHE_STALE;
774 if (__atomic_compare_exchange_n(&g_tcache_mode, &stale, TCACHE_FLUID,
775 0, __ATOMIC_ACQUIRE, __ATOMIC_RELAXED))
776 {
777 g_tcache_tv = *tv;
778 g_tcache_tm = *tm;
779 __atomic_and_fetch(&g_tcache_mode, ~TCACHE_FLUID, __ATOMIC_RELEASE);
780 }
781}
782#endif
783
784static void time_callback(struct tm *const tm, unsigned *const msec)
785{
786#if !_BT_LOG_MESSAGE_FORMAT_DATETIME_USED
787 VAR_UNUSED(tm);
788 VAR_UNUSED(msec);
789#else
790 #if defined(_WIN32) || defined(_WIN64)
791 SYSTEMTIME st;
792 GetLocalTime(&st);
793 tm->tm_year = st.wYear;
794 tm->tm_mon = st.wMonth;
795 tm->tm_mday = st.wDay;
796 tm->tm_wday = st.wDayOfWeek;
797 tm->tm_hour = st.wHour;
798 tm->tm_min = st.wMinute;
799 tm->tm_sec = st.wSecond;
800 *msec = st.wMilliseconds;
801 #else
802 struct timeval tv;
803 gettimeofday(&tv, 0);
804 #ifndef TCACHE
805 localtime_r(&tv.tv_sec, tm);
806 #else
807 if (!tcache_get(&tv, tm))
808 {
809 localtime_r(&tv.tv_sec, tm);
810 tcache_set(&tv, tm);
811 }
812 #endif
813 *msec = (unsigned)tv.tv_usec / 1000;
814 #endif
815#endif
816}
817
818static void pid_callback(int *const pid, int *const tid)
819{
820#if !_BT_LOG_MESSAGE_FORMAT_CONTAINS(PID, BT_LOG_MESSAGE_CTX_FORMAT)
821 VAR_UNUSED(pid);
822#else
823 #if defined(_WIN32) || defined(_WIN64)
824 *pid = GetCurrentProcessId();
825 #else
826 *pid = getpid();
827 #endif
828#endif
829
830#if !_BT_LOG_MESSAGE_FORMAT_CONTAINS(TID, BT_LOG_MESSAGE_CTX_FORMAT)
831 VAR_UNUSED(tid);
832#else
833 #if defined(_WIN32) || defined(_WIN64)
834 *tid = GetCurrentThreadId();
f61ad754
MJ		 835 #elif defined(__CYGWIN__)
836 pthread_t thr = pthread_self();
837 *tid = (int)pthread_getsequence_np(&thr);
c0c0c8b4
MJ		 838 #elif defined(__sun__)
839 *tid = (int)pthread_self();
beb0fb75
PP		 840 #elif defined(__ANDROID__)
841 *tid = gettid();
842 #elif defined(__linux__)
843 *tid = syscall(SYS_gettid);
844 #elif defined(__MACH__)
845 *tid = (int)pthread_mach_thread_np(pthread_self());
846 #else
847 #define Platform not supported
848 #endif
849#endif
850}
851
852static void buffer_callback(bt_log_message *msg, char *buf)
853{
854 msg->e = (msg->p = msg->buf = buf) + g_buf_sz;
855}
856
857#if _BT_LOG_MESSAGE_FORMAT_CONTAINS(FUNCTION, BT_LOG_MESSAGE_SRC_FORMAT)
858static const char *funcname(const char *func)
859{
860 return func? func: "";
861}
862#endif
863
864#if _BT_LOG_MESSAGE_FORMAT_CONTAINS(FILENAME, BT_LOG_MESSAGE_SRC_FORMAT)
865static const char *filename(const char *file)
866{
867 const char *f = file;
868 for (const char *p = file; 0 != *p; ++p)
869 {
870 if ('/' == *p || '\\' == *p)
871 {
872 f = p + 1;
873 }
874 }
875 return f;
876}
877#endif
878
879static INLINE size_t nprintf_size(bt_log_message *const msg)
880{
881 // *nprintf() always puts 0 in the end when input buffer is not empty. This
882 // 0 is not desired because its presence sets (ctx->p) to (ctx->e - 1) which
883 // leaves space for one more character. Some put_xxx() functions don't use
884 // *nprintf() and could use that last character. In that case log line will
885 // have multiple (two) half-written parts which is confusing. To workaround
886 // that we allow *nprintf() to write its 0 in the eol area (which is always
887 // not empty).
888 return (size_t)(msg->e - msg->p + 1);
889}
890
891static INLINE void put_nprintf(bt_log_message *const msg, const int n)
892{
893 if (0 < n)
894 {
895 msg->p = n < msg->e - msg->p? msg->p + n: msg->e;
896 }
897}
898
899static INLINE char *put_padding_r(const unsigned w, const char wc,
900 char *p, char *e)
901{
902 for (char *const b = e - w; b < p; *--p = wc) {}
903 return p;
904}
905
906static char *put_integer_r(unsigned v, const int sign,
907 const unsigned w, const char wc, char *const e)
908{
909 static const char _signs[] = {'-', '0', '+'};
ee07b1e9 910 const char *const signs = _signs + 1;
beb0fb75
PP		 911 char *p = e;
912 do { *--p = '0' + v % 10; } while (0 != (v /= 10));
913 if (0 == sign) return put_padding_r(w, wc, p, e);
914 if ('0' != wc)
915 {
916 *--p = signs[sign];
917 return put_padding_r(w, wc, p, e);
918 }
919 p = put_padding_r(w, wc, p, e + 1);
920 *--p = signs[sign];
921 return p;
922}
923
924static INLINE char *put_uint_r(const unsigned v, const unsigned w, const char wc,
925 char *const e)
926{
927 return put_integer_r(v, 0, w, wc, e);
928}
929
930static INLINE char *put_int_r(const int v, const unsigned w, const char wc,
931 char *const e)
932{
933 return 0 <= v? put_integer_r((unsigned)v, 0, w, wc, e)
934 : put_integer_r((unsigned)-v, -1, w, wc, e);
935}
936
937static INLINE char *put_stringn(const char *const s_p, const char *const s_e,
938 char *const p, char *const e)
939{
940 const ptrdiff_t m = e - p;
941 ptrdiff_t n = s_e - s_p;
942 if (n > m)
943 {
944 n = m;
945 }
946 memcpy(p, s_p, n);
947 return p + n;
948}
949
950static INLINE char *put_string(const char *s, char *p, char *const e)
951{
952 const ptrdiff_t n = e - p;
953 char *const c = (char *)memccpy(p, s, '\0', n);
954 return 0 != c? c - 1: e;
955}
956
957static INLINE char *put_uint(unsigned v, const unsigned w, const char wc,
958 char *const p, char *const e)
959{
960 char buf[16];
961 char *const se = buf + _countof(buf);
962 char *sp = put_uint_r(v, w, wc, se);
963 return put_stringn(sp, se, p, e);
964}
965
966#define PUT_CSTR_R(p, STR) \
967 do { \
968 for (unsigned i = sizeof(STR) - 1; 0 < i--;) { \
969 *--(p) = (STR)[i]; \
970 } \
971 } _BT_LOG_ONCE
972
973#define PUT_CSTR_CHECKED(p, e, STR) \
974 do { \
975 for (unsigned i = 0; (e) > (p) && (sizeof(STR) - 1) > i; ++i) { \
976 *(p)++ = (STR)[i]; \
977 } \
978 } _BT_LOG_ONCE
979
980/* F_INIT field support.
981 */
982#define _BT_LOG_MESSAGE_FORMAT_INIT__
983#define _BT_LOG_MESSAGE_FORMAT_INIT__YEAR
984#define _BT_LOG_MESSAGE_FORMAT_INIT__MONTH
985#define _BT_LOG_MESSAGE_FORMAT_INIT__DAY
986#define _BT_LOG_MESSAGE_FORMAT_INIT__HOUR
987#define _BT_LOG_MESSAGE_FORMAT_INIT__MINUTE
988#define _BT_LOG_MESSAGE_FORMAT_INIT__SECOND
989#define _BT_LOG_MESSAGE_FORMAT_INIT__MILLISECOND
990#define _BT_LOG_MESSAGE_FORMAT_INIT__PID
991#define _BT_LOG_MESSAGE_FORMAT_INIT__TID
992#define _BT_LOG_MESSAGE_FORMAT_INIT__LEVEL
993#define _BT_LOG_MESSAGE_FORMAT_INIT__TAG(ps, ts)
994#define _BT_LOG_MESSAGE_FORMAT_INIT__FUNCTION
995#define _BT_LOG_MESSAGE_FORMAT_INIT__FILENAME
996#define _BT_LOG_MESSAGE_FORMAT_INIT__FILELINE
997#define _BT_LOG_MESSAGE_FORMAT_INIT__S(s)
998#define _BT_LOG_MESSAGE_FORMAT_INIT__F_INIT(expr) _PP_UNTUPLE(expr);
999#define _BT_LOG_MESSAGE_FORMAT_INIT__F_UINT(w, v)
1000#define _BT_LOG_MESSAGE_FORMAT_INIT(field) \
1001 _PP_CONCAT_3(_BT_LOG_MESSAGE_FORMAT_INIT_, _, field)
1002
1003/* Implements generation of printf-like format string for log message
1004 * format specification.
1005 */
1006#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__ ""
1007#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__YEAR "%04u"
1008#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__MONTH "%02u"
1009#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__DAY "%02u"
1010#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__HOUR "%02u"
1011#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__MINUTE "%02u"
1012#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__SECOND "%02u"
1013#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__MILLISECOND "%03u"
1014#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__PID "%5i"
1015#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__TID "%5i"
1016#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__LEVEL "%c"
1017#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__TAG UNDEFINED
1018#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__FUNCTION "%s"
1019#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__FILENAME "%s"
1020#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__FILELINE "%u"
1021#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__S(s) s
1022#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__F_INIT(expr) ""
1023#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT__F_UINT(w, v) "%" #w "u"
1024#define _BT_LOG_MESSAGE_FORMAT_PRINTF_FMT(field) \
1025 _PP_CONCAT_3(_BT_LOG_MESSAGE_FORMAT_PRINTF_FMT_, _, field)
1026
1027/* Implements generation of printf-like format parameters for log message
1028 * format specification.
1029 */
1030#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__
1031#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__YEAR ,(unsigned)(tm.tm_year + 1900)
1032#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__MONTH ,(unsigned)(tm.tm_mon + 1)
1033#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__DAY ,(unsigned)tm.tm_mday
1034#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__HOUR ,(unsigned)tm.tm_hour
1035#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__MINUTE ,(unsigned)tm.tm_min
1036#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__SECOND ,(unsigned)tm.tm_sec
1037#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__MILLISECOND ,(unsigned)msec
1038#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__PID ,pid
1039#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__TID ,tid
1040#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__LEVEL ,(char)lvl_char(msg->lvl)
1041#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__TAG UNDEFINED
1042#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__FUNCTION ,funcname(src->func)
1043#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__FILENAME ,filename(src->file)
1044#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__FILELINE ,src->line
1045#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__S(s)
1046#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__F_INIT(expr)
1047#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL__F_UINT(w, v) ,v
1048#define _BT_LOG_MESSAGE_FORMAT_PRINTF_VAL(field) \
1049 _PP_CONCAT_3(_BT_LOG_MESSAGE_FORMAT_PRINTF_VAL_, _, field)
1050
1051/* Implements generation of put_xxx_t statements for log message specification.
1052 */
1053#define _BT_LOG_MESSAGE_FORMAT_PUT_R__
1054#define _BT_LOG_MESSAGE_FORMAT_PUT_R__YEAR p = put_uint_r(tm.tm_year + 1900, 4, '0', p);
1055#define _BT_LOG_MESSAGE_FORMAT_PUT_R__MONTH p = put_uint_r((unsigned)tm.tm_mon + 1, 2, '0', p);
1056#define _BT_LOG_MESSAGE_FORMAT_PUT_R__DAY p = put_uint_r((unsigned)tm.tm_mday, 2, '0', p);
1057#define _BT_LOG_MESSAGE_FORMAT_PUT_R__HOUR p = put_uint_r((unsigned)tm.tm_hour, 2, '0', p);
1058#define _BT_LOG_MESSAGE_FORMAT_PUT_R__MINUTE p = put_uint_r((unsigned)tm.tm_min, 2, '0', p);
1059#define _BT_LOG_MESSAGE_FORMAT_PUT_R__SECOND p = put_uint_r((unsigned)tm.tm_sec, 2, '0', p);
1060#define _BT_LOG_MESSAGE_FORMAT_PUT_R__MILLISECOND p = put_uint_r(msec, 3, '0', p);
1061#define _BT_LOG_MESSAGE_FORMAT_PUT_R__PID p = put_int_r(pid, 5, ' ', p);
1062#define _BT_LOG_MESSAGE_FORMAT_PUT_R__TID p = put_int_r(tid, 5, ' ', p);
1063#define _BT_LOG_MESSAGE_FORMAT_PUT_R__LEVEL *--p = lvl_char(msg->lvl);
1064#define _BT_LOG_MESSAGE_FORMAT_PUT_R__TAG UNDEFINED
1065#define _BT_LOG_MESSAGE_FORMAT_PUT_R__FUNCTION UNDEFINED
1066#define _BT_LOG_MESSAGE_FORMAT_PUT_R__FILENAME UNDEFINED
1067#define _BT_LOG_MESSAGE_FORMAT_PUT_R__FILELINE UNDEFINED
1068#define _BT_LOG_MESSAGE_FORMAT_PUT_R__S(s) PUT_CSTR_R(p, s);
1069#define _BT_LOG_MESSAGE_FORMAT_PUT_R__F_INIT(expr)
1070#define _BT_LOG_MESSAGE_FORMAT_PUT_R__F_UINT(w, v) p = put_uint_r(v, w, ' ', p);
1071#define _BT_LOG_MESSAGE_FORMAT_PUT_R(field) \
1072 _PP_CONCAT_3(_BT_LOG_MESSAGE_FORMAT_PUT_R_, _, field)
1073
1074static void put_ctx(bt_log_message *const msg)
1075{
1076 _PP_MAP(_BT_LOG_MESSAGE_FORMAT_INIT, BT_LOG_MESSAGE_CTX_FORMAT)
1077#if !_BT_LOG_MESSAGE_FORMAT_FIELDS(BT_LOG_MESSAGE_CTX_FORMAT)
1078 VAR_UNUSED(msg);
1079#else
1080 #if _BT_LOG_MESSAGE_FORMAT_DATETIME_USED
1081 struct tm tm;
1082 unsigned msec;
1083 g_time_cb(&tm, &msec);
1084 #endif
1085 #if _BT_LOG_MESSAGE_FORMAT_CONTAINS(PID, BT_LOG_MESSAGE_CTX_FORMAT) || \
1086 _BT_LOG_MESSAGE_FORMAT_CONTAINS(TID, BT_LOG_MESSAGE_CTX_FORMAT)
1087 int pid, tid;
1088 g_pid_cb(&pid, &tid);
1089 #endif
1090
1091 #if BT_LOG_OPTIMIZE_SIZE
1092 int n;
1093 n = snprintf(msg->p, nprintf_size(msg),
1094 _PP_MAP(_BT_LOG_MESSAGE_FORMAT_PRINTF_FMT, BT_LOG_MESSAGE_CTX_FORMAT)
1095 _PP_MAP(_BT_LOG_MESSAGE_FORMAT_PRINTF_VAL, BT_LOG_MESSAGE_CTX_FORMAT));
1096 put_nprintf(msg, n);
1097 #else
1098 char buf[64];
1099 char *const e = buf + sizeof(buf);
1100 char *p = e;
1101 _PP_RMAP(_BT_LOG_MESSAGE_FORMAT_PUT_R, BT_LOG_MESSAGE_CTX_FORMAT)
1102 msg->p = put_stringn(p, e, msg->p, msg->e);
1103 #endif
1104#endif
1105}
1106
1107#define PUT_TAG(msg, tag, prefix_delim, tag_delim) \
1108 do { \
1109 const char *ch; \
1110 msg->tag_b = msg->p; \
1111 if (0 != (ch = _bt_log_tag_prefix)) { \
1112 for (;msg->e != msg->p && 0 != (*msg->p = *ch); ++msg->p, ++ch) {} \
1113 } \
1114 if (0 != (ch = tag) && 0 != tag[0]) { \
1115 if (msg->tag_b != msg->p) { \
1116 PUT_CSTR_CHECKED(msg->p, msg->e, prefix_delim); \
1117 } \
1118 for (;msg->e != msg->p && 0 != (*msg->p = *ch); ++msg->p, ++ch) {} \
1119 } \
1120 msg->tag_e = msg->p; \
1121 if (msg->tag_b != msg->p) { \
1122 PUT_CSTR_CHECKED(msg->p, msg->e, tag_delim); \
1123 } \
1124 } _BT_LOG_ONCE
1125
1126/* Implements simple put statements for log message specification.
1127 */
1128#define _BT_LOG_MESSAGE_FORMAT_PUT__
1129#define _BT_LOG_MESSAGE_FORMAT_PUT__YEAR UNDEFINED
1130#define _BT_LOG_MESSAGE_FORMAT_PUT__MONTH UNDEFINED
1131#define _BT_LOG_MESSAGE_FORMAT_PUT__DAY UNDEFINED
1132#define _BT_LOG_MESSAGE_FORMAT_PUT__HOUR UNDEFINED
1133#define _BT_LOG_MESSAGE_FORMAT_PUT__MINUTE UNDEFINED
1134#define _BT_LOG_MESSAGE_FORMAT_PUT__SECOND UNDEFINED
1135#define _BT_LOG_MESSAGE_FORMAT_PUT__MILLISECOND UNDEFINED
1136#define _BT_LOG_MESSAGE_FORMAT_PUT__PID UNDEFINED
1137#define _BT_LOG_MESSAGE_FORMAT_PUT__TID UNDEFINED
1138#define _BT_LOG_MESSAGE_FORMAT_PUT__LEVEL UNDEFINED
1139#define _BT_LOG_MESSAGE_FORMAT_PUT__TAG(pd, td) PUT_TAG(msg, tag, pd, td);
1140#define _BT_LOG_MESSAGE_FORMAT_PUT__FUNCTION msg->p = put_string(funcname(src->func), msg->p, msg->e);
1141#define _BT_LOG_MESSAGE_FORMAT_PUT__FILENAME msg->p = put_string(filename(src->file), msg->p, msg->e);
1142#define _BT_LOG_MESSAGE_FORMAT_PUT__FILELINE msg->p = put_uint(src->line, 0, '\0', msg->p, msg->e);
1143#define _BT_LOG_MESSAGE_FORMAT_PUT__S(s) PUT_CSTR_CHECKED(msg->p, msg->e, s);
1144#define _BT_LOG_MESSAGE_FORMAT_PUT__F_INIT(expr)
1145#define _BT_LOG_MESSAGE_FORMAT_PUT__F_UINT(w, v) msg->p = put_uint(v, w, ' ', msg->p, msg->e);
1146#define _BT_LOG_MESSAGE_FORMAT_PUT(field) \
1147 _PP_CONCAT_3(_BT_LOG_MESSAGE_FORMAT_PUT_, _, field)
1148
1149static void put_tag(bt_log_message *const msg, const char *const tag)
1150{
1151 _PP_MAP(_BT_LOG_MESSAGE_FORMAT_INIT, BT_LOG_MESSAGE_TAG_FORMAT)
1152#if !_BT_LOG_MESSAGE_FORMAT_CONTAINS(TAG, BT_LOG_MESSAGE_TAG_FORMAT)
1153 VAR_UNUSED(tag);
1154#endif
1155#if !_BT_LOG_MESSAGE_FORMAT_FIELDS(BT_LOG_MESSAGE_TAG_FORMAT)
1156 VAR_UNUSED(msg);
1157#else
1158 _PP_MAP(_BT_LOG_MESSAGE_FORMAT_PUT, BT_LOG_MESSAGE_TAG_FORMAT)
1159#endif
1160}
1161
1162static void put_src(bt_log_message *const msg, const src_location *const src)
1163{
1164 _PP_MAP(_BT_LOG_MESSAGE_FORMAT_INIT, BT_LOG_MESSAGE_SRC_FORMAT)
1165#if !_BT_LOG_MESSAGE_FORMAT_CONTAINS(FUNCTION, BT_LOG_MESSAGE_SRC_FORMAT) && \
1166 !_BT_LOG_MESSAGE_FORMAT_CONTAINS(FILENAME, BT_LOG_MESSAGE_SRC_FORMAT) && \
1167 !_BT_LOG_MESSAGE_FORMAT_CONTAINS(FILELINE, BT_LOG_MESSAGE_SRC_FORMAT)
1168 VAR_UNUSED(src);
1169#endif
1170#if !_BT_LOG_MESSAGE_FORMAT_FIELDS(BT_LOG_MESSAGE_SRC_FORMAT)
1171 VAR_UNUSED(msg);
1172#else
1173 #if BT_LOG_OPTIMIZE_SIZE
1174 int n;
1175 n = snprintf(msg->p, nprintf_size(msg),
1176 _PP_MAP(_BT_LOG_MESSAGE_FORMAT_PRINTF_FMT, BT_LOG_MESSAGE_SRC_FORMAT)
1177 _PP_MAP(_BT_LOG_MESSAGE_FORMAT_PRINTF_VAL, BT_LOG_MESSAGE_SRC_FORMAT));
1178 put_nprintf(msg, n);
1179 #else
1180 _PP_MAP(_BT_LOG_MESSAGE_FORMAT_PUT, BT_LOG_MESSAGE_SRC_FORMAT)
1181 #endif
1182#endif
1183}
1184
1185static void put_msg(bt_log_message *const msg,
1186 const char *const fmt, va_list va)
1187{
1188 int n;
1189 msg->msg_b = msg->p;
1190 n = vsnprintf(msg->p, nprintf_size(msg), fmt, va);
1191 put_nprintf(msg, n);
1192}
1193
1194static void output_mem(const bt_log_spec *log, bt_log_message *const msg,
1195 const mem_block *const mem)
1196{
1197 if (0 == mem->d || 0 == mem->d_sz)
1198 {
1199 return;
1200 }
1201 const unsigned char *mem_p = (const unsigned char *)mem->d;
1202 const unsigned char *const mem_e = mem_p + mem->d_sz;
1203 const unsigned char *mem_cut;
1204 const ptrdiff_t mem_width = (ptrdiff_t)log->format->mem_width;
1205 char *const hex_b = msg->msg_b;
1206 char *const ascii_b = hex_b + 2 * mem_width + 2;
1207 char *const ascii_e = ascii_b + mem_width;
1208 if (msg->e < ascii_e)
1209 {
1210 return;
1211 }
1212 while (mem_p != mem_e)
1213 {
1214 char *hex = hex_b;
1215 char *ascii = ascii_b;
1216 for (mem_cut = mem_width < mem_e - mem_p? mem_p + mem_width: mem_e;
1217 mem_cut != mem_p; ++mem_p)
1218 {
1219 const unsigned char ch = *mem_p;
1220 *hex++ = c_hex[(0xf0 & ch) >> 4];
1221 *hex++ = c_hex[(0x0f & ch)];
1222 *ascii++ = isprint(ch)? (char)ch: '?';
1223 }
1224 while (hex != ascii_b)
1225 {
1226 *hex++ = ' ';
1227 }
1228 msg->p = ascii;
1229 log->output->callback(msg, log->output->arg);
1230 }
1231}
1232
1233BT_HIDDEN
1234void bt_log_set_tag_prefix(const char *const prefix)
1235{
1236 _bt_log_tag_prefix = prefix;
1237}
1238
1239BT_HIDDEN
1240void bt_log_set_mem_width(const unsigned w)
1241{
1242 _bt_log_global_format.mem_width = w;
1243}
1244
1245BT_HIDDEN
1246void bt_log_set_output_level(const int lvl)
1247{
1248 _bt_log_global_output_lvl = lvl;
1249}
1250
1251BT_HIDDEN
1252void bt_log_set_output_v(const unsigned mask, void *const arg,
1253 const bt_log_output_cb callback)
1254{
1255 _bt_log_global_output.mask = mask;
1256 _bt_log_global_output.arg = arg;
1257 _bt_log_global_output.callback = callback;
1258}
1259
1260static void _bt_log_write_imp(
1261 const bt_log_spec *log,
1262 const src_location *const src, const mem_block *const mem,
1263 const int lvl, const char *const tag, const char *const fmt, va_list va)
1264{
1265 bt_log_message msg;
1266 char buf[BT_LOG_BUF_SZ];
1267 const unsigned mask = log->output->mask;
1268 msg.lvl = lvl;
1269 msg.tag = tag;
1270 g_buffer_cb(&msg, buf);
557d8f39
PP		 1271 const char *rst_color_p = bt_common_color_reset();
1272 const char *rst_color_e = rst_color_p + strlen(rst_color_p);
1273 const char *color_p = "";
1274 const char *color_e = color_p;
1275
1276 switch (lvl) {
1277 case BT_LOG_INFO:
1278 color_p = bt_common_color_fg_blue();
1279 color_e = color_p + strlen(color_p);
1280 break;
1281 case BT_LOG_WARN:
1282 color_p = bt_common_color_fg_yellow();
1283 color_e = color_p + strlen(color_p);
1284 break;
1285 case BT_LOG_ERROR:
1286 case BT_LOG_FATAL:
1287 color_p = bt_common_color_fg_red();
1288 color_e = color_p + strlen(color_p);
1289 break;
1290 default:
1291 break;
1292 }
1293
1294 msg.p = put_stringn(color_p, color_e, msg.p, msg.e);
1295
beb0fb75
PP		 1296 if (BT_LOG_PUT_CTX & mask)
1297 {
1298 put_ctx(&msg);
1299 }
1300 if (BT_LOG_PUT_TAG & mask)
1301 {
1302 put_tag(&msg, tag);
1303 }
1304 if (0 != src && BT_LOG_PUT_SRC & mask)
1305 {
1306 put_src(&msg, src);
1307 }
1308 if (BT_LOG_PUT_MSG & mask)
1309 {
1310 put_msg(&msg, fmt, va);
1311 }
557d8f39 1312 msg.p = put_stringn(rst_color_p, rst_color_e, msg.p, msg.e);
beb0fb75
PP		 1313 log->output->callback(&msg, log->output->arg);
1314 if (0 != mem && BT_LOG_PUT_MSG & mask)
1315 {
1316 output_mem(log, &msg, mem);
1317 }
1318}
1319
1320BT_HIDDEN
1321void _bt_log_write_d(
1322 const char *const func, const char *const file, const unsigned line,
1323 const int lvl, const char *const tag,
1324 const char *const fmt, ...)
1325{
1326 const src_location src = {func, file, line};
1327 va_list va;
1328 va_start(va, fmt);
1329 _bt_log_write_imp(&global_spec, &src, 0, lvl, tag, fmt, va);
1330 va_end(va);
1331}
1332
1333BT_HIDDEN
1334void _bt_log_write_aux_d(
1335 const char *const func, const char *const file, const unsigned line,
1336 const bt_log_spec *const log, const int lvl, const char *const tag,
1337 const char *const fmt, ...)
1338{
1339 const src_location src = {func, file, line};
1340 va_list va;
1341 va_start(va, fmt);
1342 _bt_log_write_imp(log, &src, 0, lvl, tag, fmt, va);
1343 va_end(va);
1344}
1345
1346BT_HIDDEN
1347void _bt_log_write(const int lvl, const char *const tag,
1348 const char *const fmt, ...)
1349{
1350 va_list va;
1351 va_start(va, fmt);
1352 _bt_log_write_imp(&global_spec, 0, 0, lvl, tag, fmt, va);
1353 va_end(va);
1354}
1355
1356BT_HIDDEN
1357void _bt_log_write_aux(
1358 const bt_log_spec *const log, const int lvl, const char *const tag,
1359 const char *const fmt, ...)
1360{
1361 va_list va;
1362 va_start(va, fmt);
1363 _bt_log_write_imp(log, 0, 0, lvl, tag, fmt, va);
1364 va_end(va);
1365}
1366
1367BT_HIDDEN
1368void _bt_log_write_mem_d(
1369 const char *const func, const char *const file, const unsigned line,
1370 const int lvl, const char *const tag,
1371 const void *const d, const unsigned d_sz,
1372 const char *const fmt, ...)
1373{
1374 const src_location src = {func, file, line};
1375 const mem_block mem = {d, d_sz};
1376 va_list va;
1377 va_start(va, fmt);
1378 _bt_log_write_imp(&global_spec, &src, &mem, lvl, tag, fmt, va);
1379 va_end(va);
1380}
1381
1382BT_HIDDEN
1383void _bt_log_write_mem_aux_d(
1384 const char *const func, const char *const file, const unsigned line,
1385 const bt_log_spec *const log, const int lvl, const char *const tag,
1386 const void *const d, const unsigned d_sz,
1387 const char *const fmt, ...)
1388{
1389 const src_location src = {func, file, line};
1390 const mem_block mem = {d, d_sz};
1391 va_list va;
1392 va_start(va, fmt);
1393 _bt_log_write_imp(log, &src, &mem, lvl, tag, fmt, va);
1394 va_end(va);
1395}
1396
1397BT_HIDDEN
1398void _bt_log_write_mem(const int lvl, const char *const tag,
1399 const void *const d, const unsigned d_sz,
1400 const char *const fmt, ...)
1401{
1402 const mem_block mem = {d, d_sz};
1403 va_list va;
1404 va_start(va, fmt);
1405 _bt_log_write_imp(&global_spec, 0, &mem, lvl, tag, fmt, va);
1406 va_end(va);
1407}
1408
1409BT_HIDDEN
1410void _bt_log_write_mem_aux(
1411 const bt_log_spec *const log, const int lvl, const char *const tag,
1412 const void *const d, const unsigned d_sz,
1413 const char *const fmt, ...)
1414{
1415 const mem_block mem = {d, d_sz};
1416 va_list va;
1417 va_start(va, fmt);
1418 _bt_log_write_imp(log, 0, &mem, lvl, tag, fmt, va);
1419 va_end(va);
1420}
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