1 /* log - a generic logging facility in the spirit of log4j */
3 /* Copyright (c) 2004-2015. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
11 #include <stdio.h> /* snprintf */
12 #include <stdlib.h> /* snprintf */
14 #include "src/internal_config.h"
16 #include "src/xbt_modinter.h"
21 #include "xbt/sysdep.h"
22 #include "src/xbt/log_private.h"
23 #include "xbt/dynar.h"
24 #include "xbt/xbt_os_thread.h"
26 int xbt_log_no_loc = 0; /* if set to true (with --log=no_loc), file localization will be omitted (for tesh tests) */
27 static xbt_os_mutex_t log_cat_init_mutex = NULL;
29 /** \addtogroup XBT_log
31 * This section describes the API to the log functions used
32 * everywhere in this project.
34 \section XBT_log_toc Table of contents
44 - \ref log_API_isenabled
47 - \ref log_API_example
50 - \ref log_use_conf_thres
51 - \ref log_use_conf_multi
52 - \ref log_use_conf_fmt
53 - \ref log_use_conf_app
54 - \ref log_use_conf_add
61 \section log_overview 1. Introduction
63 This module is in charge of handling the log messages of every SimGrid
64 program. The main design goal are:
66 - <b>configurability</b>: the user can choose <i>at runtime</i> what messages to show and
67 what to hide, as well as how messages get displayed.
68 - <b>ease of use</b>: both to the programmer (using preprocessor macros black magic)
69 and to the user (with command line options)
70 - <b>performances</b>: logging shouldn't slow down the program when turned off, for example
71 - deal with <b>distributed settings</b>: SimGrid programs are [often] distributed ones,
72 and the logging mechanism allows to syndicate each and every log source into the same place.
73 At least, its design would allow to, once we write the last missing pieces
75 There is three main concepts in SimGrid's logging mechanism: <i>category</i>,
76 <i>priority</i> and <i>appender</i>. These three concepts work together to
77 enable developers to log messages according to message type and priority, and
78 to control at runtime how these messages are formatted and where they are
81 \subsection log_cat 1.1 Category hierarchy
83 The first and foremost advantage of any logging API over plain printf()
84 resides in its ability to disable certain log statements while allowing
85 others to print unhindered. This capability assumes that the logging space,
86 that is, the space of all possible logging statements, is categorized
87 according to some developer-chosen criteria.
89 This observation led to choosing category as the central concept of the
90 system. In a certain sense, they can be considered as logging topics or
93 \subsection log_pri 1.2 Logging priorities
95 The user can naturally declare interest into this or that logging category, but
96 he also can specify the desired level of details for each of them. This is
97 controlled by the <i>priority</i> concept (which should maybe be renamed to
100 Empirically, the user can specify that he wants to see every debugging message
101 of MSG while only being interested into the messages at level "error" or
102 higher about the XBT internals.
104 \subsection log_app 1.3 Message appenders
106 The message appenders are the elements in charge of actually displaying the
107 message to the user. For now, four appenders exist:
108 - the default one prints stuff on stderr
109 - file sends the data to a single file
110 - rollfile overwrites the file when the file grows too large
111 - splitfile creates new files with a specific maximum size
113 Other are planed (such as the one sending everything to a remote server)
116 \subsection log_lay 1.4 Message layouts
118 The message layouts are the elements in charge of choosing how each message
119 will look like. Their result is a string which is then passed to the appender
120 attached to the category to be displayed.
122 For now, there is two layouts: The simple one, which is good for most cases,
123 and another one allowing users to specify the format they want.
124 \ref log_use_conf provides more info on this.
126 \subsection log_hist 1.5 History of this module
128 Historically, this module is an adaptation of the log4c project, which is dead
129 upstream, and which I was given the permission to fork under the LGPL licence
130 by the log4c's authors. The log4c project itself was loosely based on the
131 Apache project's Log4J, which also inspired Log4CC, Log4py and so on. Our work
132 differs somehow from these projects anyway, because the C programming language
133 is not object oriented.
135 \section log_API 2. Programmer interface
137 \subsection log_API_cat 2.1 Constructing the category hierarchy
139 Every category is declared by providing a name and an optional
140 parent. If no parent is explicitly named, the root category, LOG_ROOT_CAT is
141 the category's parent.
143 A category is created by a macro call at the top level of a file. A
144 category can be created with any one of the following macros:
146 - \ref XBT_LOG_NEW_CATEGORY(MyCat,desc); Create a new root
147 - \ref XBT_LOG_NEW_SUBCATEGORY(MyCat, ParentCat,desc);
148 Create a new category being child of the category ParentCat
149 - \ref XBT_LOG_NEW_DEFAULT_CATEGORY(MyCat,desc);
150 Like XBT_LOG_NEW_CATEGORY, but the new category is the default one
152 - \ref XBT_LOG_NEW_DEFAULT_SUBCATEGORY(MyCat, ParentCat,desc);
153 Like XBT_LOG_NEW_SUBCATEGORY, but the new category is the default one
156 The parent cat can be defined in the same file or in another file (in
157 which case you want to use the \ref XBT_LOG_EXTERNAL_CATEGORY macro to make
158 it visible in the current file), but each category may have only one
159 definition. Likewise, you can use a category defined in another file as
160 default one using \ref XBT_LOG_EXTERNAL_DEFAULT_CATEGORY
162 Typically, there will be a Category for each module and sub-module, so you
163 can independently control logging for each module.
165 For a list of all existing categories, please refer to the \ref XBT_log_cats
166 section. This file is generated automatically from the SimGrid source code, so
167 it should be complete and accurate.
169 \section log_API_pri 2.2 Declaring message priority
171 A category may be assigned a threshold priority. The set of priorities are
172 defined by the \ref e_xbt_log_priority_t enum. All logging request under
173 this priority will be discarded.
175 If a given category is not assigned a threshold priority, then it inherits
176 one from its closest ancestor with an assigned threshold. To ensure that all
177 categories can eventually inherit a threshold, the root category always has
178 an assigned threshold priority.
180 Logging requests are made by invoking a logging macro on a category. All of
181 the macros have a printf-style format string followed by arguments. If you
182 compile with the -Wall option, gcc will warn you for unmatched arguments, ie
183 when you pass a pointer to a string where an integer was specified by the
184 format. This is usually a good idea.
186 Here is an example of the most basic type of macro. This is a logging
187 request with priority <i>warning</i>.
189 <code>XBT_CLOG(MyCat, xbt_log_priority_warning, "Values are: %d and '%s'", 5,
192 A logging request is said to be enabled if its priority is higher than or
193 equal to the threshold priority of its category. Otherwise, the request is
194 said to be disabled. A category without an assigned priority will inherit
195 one from the hierarchy.
197 It is possible to use any non-negative integer as a priority. If, as in the
198 example, one of the standard priorities is used, then there is a convenience
199 macro that is typically used instead. For example, the above example is
200 equivalent to the shorter:
202 <code>XBT_CWARN(MyCat, "Values are: %d and '%s'", 5, "oops");</code>
204 \section log_API_isenabled 2.3 Checking if a particular category/priority is enabled
206 It is sometimes useful to check whether a particular category is
207 enabled at a particular priority. One example is when you want to do
208 some extra computation to prepare a nice debugging message. There is
209 no use of doing so if the message won't be used afterward because
210 debugging is turned off.
212 Doing so is extremely easy, thanks to the XBT_LOG_ISENABLED(category, priority).
214 \section log_API_subcat 2.4 Using a default category (the easy interface)
216 If \ref XBT_LOG_NEW_DEFAULT_SUBCATEGORY(MyCat, Parent) or
217 \ref XBT_LOG_NEW_DEFAULT_CATEGORY(MyCat) is used to create the
218 category, then the even shorter form can be used:
220 <code>XBT_WARN("Values are: %s and '%d'", 5, "oops");</code>
222 Only one default category can be created per file, though multiple
223 non-defaults can be created and used.
225 \section log_API_easy 2.5 Putting all together: the easy interface
227 First of all, each module should register its own category into the categories
228 tree using \ref XBT_LOG_NEW_DEFAULT_SUBCATEGORY.
230 Then, logging should be done with the #XBT_DEBUG, #XBT_VERB, #XBT_INFO,
231 #XBT_WARN, #XBT_ERROR and #XBT_CRITICAL macros.
233 Under GCC, these macro check there arguments the same way than printf does. So,
234 if you compile with -Wall, the following code will issue a warning:
235 <code>XBT_DEBUG("Found %s (id %d)", some_string, a_double)</code>
237 If you want to specify the category to log onto (for example because you
238 have more than one category per file, add a C before the name of the log
239 producing macro (ie, use #XBT_CDEBUG, #XBT_CVERB, #XBT_CINFO, #XBT_CWARN,
240 #XBT_CERROR and #XBT_CCRITICAL and friends), and pass the category name as
243 The TRACE priority is not used the same way than the other. You should use
244 the #XBT_IN, #XBT_OUT and #XBT_HERE macros instead.
246 \section log_API_example 2.6 Example of use
248 Here is a more complete example:
253 / * create a category and a default subcategory * /
254 XBT_LOG_NEW_CATEGORY(VSS);
255 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(SA, VSS);
258 / * Now set the parent's priority. (the string would typically be a runtime option) * /
259 xbt_log_control_set("SA.thresh:3");
261 / * This request is enabled, because WARNING >= INFO. * /
262 XBT_CWARN(VSS, "Low fuel level.");
264 / * This request is disabled, because DEBUG < INFO. * /
265 XBT_CDEBUG(VSS, "Starting search for nearest gas station.");
267 / * The default category SA inherits its priority from VSS. Thus,
268 the following request is enabled because INFO >= INFO. * /
269 XBT_INFO("Located nearest gas station.");
271 / * This request is disabled, because DEBUG < INFO. * /
272 XBT_DEBUG("Exiting gas station search");
276 \section log_user 3. User interface
278 \section log_use_conf 3.1 Configuration
280 Although rarely done, it is possible to configure the logs during
281 program initialization by invoking the xbt_log_control_set() method
282 manually. A more conventional way is to use the --log command line
283 argument. xbt_init() (called by MSG_init() and friends)
284 checks and deals properly with such arguments.
286 \subsection log_use_conf_thres 3.1.1 Threshold configuration
288 The most common setting is to control which logging event will get
289 displayed by setting a threshold to each category through the
290 <tt>threshold</tt> keyword.
292 For example, \verbatim --log=root.threshold:debug\endverbatim will make
293 SimGrid <b>extremely</b> verbose while \verbatim
294 --log=root.thres:critical\endverbatim should shut it almost
297 Note that the <tt>threshold</tt> keyword can be abbreviated here. For example,
298 all the following notations have the same result.
300 --log=root.threshold:debug
301 --log=root.threshol:debug
302 --log=root.thresho:debug
303 --log=root.thresh:debug
304 --log=root.thres:debug
305 --log=root.thre:debug
309 --log=root.:debug <--- That's obviously really ugly, but it actually works.
312 The full list of recognized thresholds is the following:
314 - trace: enter and return of some functions
315 - debug: crufty output
316 - verbose: verbose output for the user wanting more
317 - info: output about the regular functionning
318 - warning: minor issue encountered
319 - error: issue encountered
320 - critical: major issue encountered
322 \subsection log_use_conf_multi 3.1.2 Passing several settings
324 You can provide several of those arguments to change the setting of several
325 categories, they will be applied from left to right. So,
326 \verbatim --log="root.thres:debug root.thres:critical"\endverbatim should
327 disable almost any logging.
329 Note that the quotes on above line are mandatory because there is a space in
330 the argument, so we are protecting ourselves from the shell, not from SimGrid.
331 We could also reach the same effect with this:
332 \verbatim --log=root.thres:debug --log=root.thres:critical\endverbatim
334 \subsection log_use_conf_fmt 3.1.3 Format configuration
336 As with SimGrid 3.3, it is possible to control the format of log
337 messages. This is done through the <tt>fmt</tt> keyword. For example,
338 \verbatim --log=root.fmt:%m\endverbatim reduces the output to the
339 user-message only, removing any decoration such as the date, or the
340 process ID, everything.
342 Here are the existing format directives:
345 - %%n: platform-dependent line separator (LOG4J compatible)
346 - %%e: plain old space (SimGrid extension)
348 - %%m: user-provided message
350 - %%c: Category name (LOG4J compatible)
351 - %%p: Priority name (LOG4J compatible)
353 - %%h: Hostname (SimGrid extension)
354 - %%P: Process name (SimGrid extension -- note that with SMPI this is the integer value of the process rank)
355 - %%t: Thread "name" (LOG4J compatible -- actually the address of the thread in memory)
356 - %%i: Process PID (SimGrid extension -- this is a 'i' as in 'i'dea)
358 - %%F: file name where the log event was raised (LOG4J compatible)
359 - %%l: location where the log event was raised (LOG4J compatible, like '%%F:%%L' -- this is a l as in 'l'etter)
360 - %%L: line number where the log event was raised (LOG4J compatible)
361 - %%M: function name (LOG4J compatible -- called method name here of course).
363 - %%b: full backtrace (Called %%throwable in LOG4J).
364 Defined only under windows or when using the GNU libc because backtrace() is not defined
365 elsewhere, and we only have a fallback for windows boxes, not mac ones for example.
366 - %%B: short backtrace (only the first line of the %%b).
367 Called %%throwable{short} in LOG4J; defined where %%b is.
369 - %%d: date (UNIX-like epoch)
370 - %%r: application age (time elapsed since the beginning of the application)
373 If you want to mimic the simple layout with the format one, you would use this
374 format: '[%%h:%%i:(%%i) %%r] %%l: [%%c/%%p] %%m%%n'. This is not completely correct
375 because the simple layout do not display the message location for messages at
376 priority INFO (thus, the fmt is '[%%h:%%i:(%%i) %%r] [%%c/%%p] %%m%%n' in this
377 case). Moreover, if there is no process name (ie, messages coming from the
378 library itself, or test programs doing strange things) do not display the
379 process identity (thus, fmt is '[%%r] %%l: [%%c/%%p] %%m%%n' in that case, and '[%%r]
380 [%%c/%%p] %%m%%n' if they are at priority INFO).
382 For now, there is only two format modifiers: the precision and the
383 width fields. You can for example specify %.4r to get the application
384 age with 4 numbers after the radix, or %15p to get the process name
385 on 15 columns. Finally, you can specify %10.6r to get the time on at
386 most 10 columns, with 6 numbers after the radix.
388 Note that when specifying the width, it is filled with spaces. That
389 is to say that for example %5r in your format is converted to "% 5f"
390 for printf (note the extra space); there is no way to fill the empty
391 columns with 0 (ie, pass "%05f" to printf). Another limitation is
392 that you cannot set specific layouts to the several priorities.
394 \subsection log_use_conf_app 3.1.4 Category appender
396 As with SimGrid 3.3, it is possible to control the appender of log
397 messages. This is done through the <tt>app</tt> keyword. For example,
398 \verbatim --log=root.app:file:mylogfile\endverbatim redirects the output
399 to the file mylogfile.
401 For splitfile appender, the format is
402 \verbatim --log=root.app:splitfile:size:mylogfile_%.format\endverbatim
404 The size is in bytes, and the % wildcard will be replaced by the number of the
405 file. If no % is present, it will be appended at the end.
407 rollfile appender is also available, it can be used as
408 \verbatim --log=root.app:rollfile:size:mylogfile\endverbatim
409 When the file grows to be larger than the size, it will be emptied and new log
410 events will be sent at its beginning
412 Any appender setup this way have its own layout format (simple one by default),
413 so you may have to change it too afterward. Moreover, the additivity of the log category
414 is also set to false to prevent log event displayed by this appender to "leak" to any other
415 appender higher in the hierarchy. If it is not what you wanted, you can naturally change it
418 \subsection log_use_conf_add 3.1.5 Category additivity
420 The <tt>add</tt> keyword allows to specify the additivity of a
421 category (see \ref log_in_app). '0', '1', 'no', 'yes', 'on'
422 and 'off' are all valid values, with 'yes' as default.
424 The following example resets the additivity of the xbt category to true (which is its default value).
425 \verbatim --log=xbt.add:yes\endverbatim
427 \section log_use_misc 3.2 Misc and Caveats
429 - Do not use any of the macros that start with '_'.
430 - Log4J has a 'rolling file appender' which you can select with a run-time
431 option and specify the max file size. This would be a nice default for
432 non-kernel applications.
433 - Careful, category names are global variables.
434 - When writing a log format, you often want to use spaces. If you don't
435 protect these spaces, they are used as configuration elements separators.
436 For example, if you want to remove the date from the logs, you want to pass the following
437 argument on the command line. The outer quotes are here to protect the string from the shell
438 interpretation while the inner ones are there to prevent simgrid from splitting the string
439 in several log parameters (that would be invalid).
440 \verbatim --log="'root.fmt:%l: [%p/%c]: %m%n'"\endverbatim
441 Another option is to use the SimGrid-specific format directive \%e for
442 spaces, like in the following.
443 \verbatim --log="root.fmt:%l:%e[%p/%c]:%e%m%n"\endverbatim
445 \section log_internals 4. Internal considerations
447 This module is a mess of macro black magic, and when it goes wrong,
448 SimGrid studently loose its ability to explain its problems. When
449 messing around this module, I often find useful to define
450 XBT_LOG_MAYDAY (which turns it back to good old printf) for the time
451 of finding what's going wrong. But things are quite verbose when
452 everything is enabled...
454 \section log_in_perf 4.1 Performance
456 Except for the first invocation of a given category, a disabled logging request
457 requires an a single comparison of a static variable to a constant.
459 There is also compile time constant, \ref XBT_LOG_STATIC_THRESHOLD, which
460 causes all logging requests with a lower priority to be optimized to 0 cost
461 by the compiler. By setting it to xbt_log_priority_infinite, all logging
462 requests are statically disabled at compile time and cost nothing. Released executables
463 <i>might</i> be compiled with (note that it will prevent users to debug their problems)
464 \verbatim-DXBT_LOG_STATIC_THRESHOLD=xbt_log_priority_infinite\endverbatim
466 Compiling with the \verbatim-DNLOG\endverbatim option disables all logging
467 requests at compilation time while the \verbatim-DNDEBUG\endverbatim disables
468 the requests of priority below INFO.
470 \todo Logging performance *may* be improved further by improving the message
471 propagation from appender to appender in the category tree.
473 \section log_in_app 4.2 Appenders
475 Each category has an optional appender. An appender is a pointer to a
476 structure which starts with a pointer to a do_append() function. do_append()
477 prints a message to a log.
479 When a category is passed a message by one of the logging macros, the category performs the following actions:
481 - if the category has an appender, the message is passed to the
482 appender's do_append() function,
483 - if additivity is true for the category, the message is passed to
484 the category's parent. Additivity is true by default, and can be
485 controlled by xbt_log_additivity_set() or something like --log=root.add:1 (see \ref log_use_conf_add).
486 Also, when you add an appender to a category, its additivity is automatically turned to off.
487 Turn it back on afterward if it is not what you wanted.
489 By default, only the root category have an appender, and any other category has
490 its additivity set to true. This causes all messages to be logged by the root
493 The default appender function currently prints to stderr
496 xbt_log_appender_t xbt_log_default_appender = NULL; /* set in log_init */
497 xbt_log_layout_t xbt_log_default_layout = NULL; /* set in log_init */
502 e_xbt_log_priority_t thresh;
504 xbt_log_appender_t appender;
505 } s_xbt_log_setting_t, *xbt_log_setting_t;
507 static xbt_dynar_t xbt_log_settings = NULL;
509 static void _free_setting(void *s)
511 xbt_log_setting_t set = *(xbt_log_setting_t *) s;
519 static void _xbt_log_cat_apply_set(xbt_log_category_t category, xbt_log_setting_t setting);
521 const char *xbt_log_priority_names[8] = {
532 s_xbt_log_category_t _XBT_LOGV(XBT_LOG_ROOT_CAT) = {
533 NULL /*parent */ , NULL /* firstChild */ , NULL /* nextSibling */ ,
534 "root", "The common ancestor for all categories",
535 0 /*initialized */, xbt_log_priority_uninitialized /* threshold */ ,
536 0 /* isThreshInherited */ ,
537 NULL /* appender */ , NULL /* layout */ ,
541 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(log, xbt, "Loggings from the logging mechanism itself");
543 /* create the default appender and install it in the root category,
544 which were already created (damnit. Too slow little beetle) */
545 void xbt_log_preinit(void)
547 xbt_log_default_appender = xbt_log_appender_file_new(NULL);
548 xbt_log_default_layout = xbt_log_layout_simple_new(NULL);
549 _XBT_LOGV(XBT_LOG_ROOT_CAT).appender = xbt_log_default_appender;
550 _XBT_LOGV(XBT_LOG_ROOT_CAT).layout = xbt_log_default_layout;
551 log_cat_init_mutex = xbt_os_mutex_init();
554 static void xbt_log_connect_categories(void)
556 /* Connect our log channels: that must be done manually under windows */
557 /* Also permit that they are correctly listed by xbt_log_help_categories() */
560 XBT_LOG_CONNECT(xbt);
561 XBT_LOG_CONNECT(log);
562 XBT_LOG_CONNECT(module);
563 XBT_LOG_CONNECT(replay);
564 XBT_LOG_CONNECT(strbuff);
565 XBT_LOG_CONNECT(xbt_cfg);
566 XBT_LOG_CONNECT(xbt_dict);
567 XBT_LOG_CONNECT(xbt_dict_cursor);
568 XBT_LOG_CONNECT(xbt_dict_elm);
569 XBT_LOG_CONNECT(xbt_dyn);
570 XBT_LOG_CONNECT(xbt_ex);
571 XBT_LOG_CONNECT(xbt_fifo);
572 XBT_LOG_CONNECT(xbt_graph);
573 XBT_LOG_CONNECT(xbt_heap);
574 XBT_LOG_CONNECT(xbt_lib);
575 XBT_LOG_CONNECT(xbt_mallocator);
576 XBT_LOG_CONNECT(xbt_matrix);
577 XBT_LOG_CONNECT(xbt_parmap);
578 XBT_LOG_CONNECT(xbt_sync);
579 XBT_LOG_CONNECT(xbt_sync_os);
581 #ifdef simgrid_EXPORTS
582 /* The following categories are only defined in libsimgrid */
586 XBT_LOG_CONNECT(lua);
587 XBT_LOG_CONNECT(lua_host);
588 XBT_LOG_CONNECT(lua_platf);
589 XBT_LOG_CONNECT(lua_debug);
593 XBT_LOG_CONNECT(instr);
594 XBT_LOG_CONNECT(instr_api);
595 XBT_LOG_CONNECT(instr_config);
596 XBT_LOG_CONNECT(instr_msg);
597 XBT_LOG_CONNECT(instr_msg_process);
598 XBT_LOG_CONNECT(instr_msg_vm);
599 XBT_LOG_CONNECT(instr_paje_containers);
600 XBT_LOG_CONNECT(instr_paje_header);
601 XBT_LOG_CONNECT(instr_paje_trace);
602 XBT_LOG_CONNECT(instr_paje_types);
603 XBT_LOG_CONNECT(instr_paje_values);
604 XBT_LOG_CONNECT(instr_resource);
605 XBT_LOG_CONNECT(instr_routing);
606 XBT_LOG_CONNECT(instr_surf);
607 XBT_LOG_CONNECT(instr_trace);
608 XBT_LOG_CONNECT(instr_TI_trace);
612 XBT_LOG_CONNECT(jedule);
613 XBT_LOG_CONNECT(jed_out);
614 XBT_LOG_CONNECT(jed_sd);
620 XBT_LOG_CONNECT(mc_checkpoint);
621 XBT_LOG_CONNECT(mc_comm_determinism);
622 XBT_LOG_CONNECT(mc_compare);
623 XBT_LOG_CONNECT(mc_diff);
624 XBT_LOG_CONNECT(mc_dwarf);
625 XBT_LOG_CONNECT(mc_hash);
626 XBT_LOG_CONNECT(mc_liveness);
627 XBT_LOG_CONNECT(mc_memory);
628 XBT_LOG_CONNECT(mc_page_snapshot);
629 XBT_LOG_CONNECT(mc_request);
630 XBT_LOG_CONNECT(mc_safety);
631 XBT_LOG_CONNECT(mc_VisitedState);
632 XBT_LOG_CONNECT(mc_client);
633 XBT_LOG_CONNECT(mc_client_api);
634 XBT_LOG_CONNECT(mc_comm_pattern);
635 XBT_LOG_CONNECT(mc_process);
636 XBT_LOG_CONNECT(mc_protocol);
637 XBT_LOG_CONNECT(mc_RegionSnaphot);
638 XBT_LOG_CONNECT(mc_ModelChecker);
639 XBT_LOG_CONNECT(mc_state);
641 XBT_LOG_CONNECT(mc_global);
642 XBT_LOG_CONNECT(mc_config);
643 XBT_LOG_CONNECT(mc_record);
646 XBT_LOG_CONNECT(msg);
647 XBT_LOG_CONNECT(msg_action);
648 XBT_LOG_CONNECT(msg_gos);
649 XBT_LOG_CONNECT(msg_io);
650 XBT_LOG_CONNECT(msg_kernel);
651 XBT_LOG_CONNECT(msg_mailbox);
652 XBT_LOG_CONNECT(msg_process);
653 XBT_LOG_CONNECT(msg_synchro);
654 XBT_LOG_CONNECT(msg_task);
655 XBT_LOG_CONNECT(msg_vm);
658 XBT_LOG_CONNECT(sg_host);
662 XBT_LOG_CONNECT(sd_daxparse);
664 XBT_LOG_CONNECT(sd_dotparse);
666 XBT_LOG_CONNECT(sd_kernel);
667 XBT_LOG_CONNECT(sd_task);
670 XBT_LOG_CONNECT(simix);
671 XBT_LOG_CONNECT(simix_context);
672 XBT_LOG_CONNECT(simix_deployment);
673 XBT_LOG_CONNECT(simix_environment);
674 XBT_LOG_CONNECT(simix_host);
675 XBT_LOG_CONNECT(simix_io);
676 XBT_LOG_CONNECT(simix_kernel);
677 XBT_LOG_CONNECT(simix_network);
678 XBT_LOG_CONNECT(simix_process);
679 XBT_LOG_CONNECT(simix_popping);
680 XBT_LOG_CONNECT(simix_synchro);
681 XBT_LOG_CONNECT(simix_vm);
684 /* SMPI categories are connected in smpi_global.c */
687 XBT_LOG_CONNECT(surf);
688 XBT_LOG_CONNECT(surf_config);
689 XBT_LOG_CONNECT(surf_cpu);
690 XBT_LOG_CONNECT(surf_cpu_cas);
691 XBT_LOG_CONNECT(surf_cpu_ti);
692 XBT_LOG_CONNECT(surf_energy);
693 XBT_LOG_CONNECT(surf_kernel);
694 XBT_LOG_CONNECT(surf_lagrange);
695 XBT_LOG_CONNECT(surf_lagrange_dichotomy);
696 XBT_LOG_CONNECT(surf_maxmin);
697 XBT_LOG_CONNECT(surf_network);
699 XBT_LOG_CONNECT(ns3);
701 XBT_LOG_CONNECT(surf_parse);
702 XBT_LOG_CONNECT(surf_route);
703 XBT_LOG_CONNECT(surf_routing_generic);
704 XBT_LOG_CONNECT(surf_route_cluster);
705 XBT_LOG_CONNECT(surf_route_cluster_torus);
706 XBT_LOG_CONNECT(surf_route_dijkstra);
707 XBT_LOG_CONNECT(surf_route_fat_tree);
708 XBT_LOG_CONNECT(surf_route_floyd);
709 XBT_LOG_CONNECT(surf_route_full);
710 XBT_LOG_CONNECT(surf_route_none);
711 XBT_LOG_CONNECT(surf_route_vivaldi);
712 XBT_LOG_CONNECT(surf_storage);
713 XBT_LOG_CONNECT(surf_trace);
714 XBT_LOG_CONNECT(surf_vm);
715 XBT_LOG_CONNECT(surf_host);
717 #endif /* simgrid_EXPORTS */
720 static void xbt_log_help(void);
721 static void xbt_log_help_categories(void);
723 /** @brief Get all logging settings from the command line
725 * xbt_log_control_set() is called on each string we got from cmd line
727 void xbt_log_init(int *argc, char **argv)
729 unsigned help_requested = 0; /* 1: logs; 2: categories */
733 // _XBT_LOGV(log).threshold = xbt_log_priority_debug; /* uncomment to set the LOG category to debug directly */
735 xbt_log_connect_categories();
737 /* Set logs and init log submodule */
738 for (j = i = 1; i < *argc; i++) {
739 if (!strncmp(argv[i], "--log=", strlen("--log="))) {
740 opt = strchr(argv[i], '=');
742 xbt_log_control_set(opt);
743 XBT_DEBUG("Did apply '%s' as log setting", opt);
744 } else if (!strcmp(argv[i], "--help-logs")) {
746 } else if (!strcmp(argv[i], "--help-log-categories")) {
757 if (help_requested) {
758 if (help_requested & 1)
760 if (help_requested & 2)
761 xbt_log_help_categories();
766 static void log_cat_exit(xbt_log_category_t cat)
768 xbt_log_category_t child;
771 if (cat->appender->free_)
772 cat->appender->free_(cat->appender);
776 if (cat->layout->free_)
777 cat->layout->free_(cat->layout);
781 for (child = cat->firstChild; child != NULL; child = child->nextSibling)
785 void xbt_log_postexit(void)
787 XBT_VERB("Exiting log");
788 xbt_os_mutex_destroy(log_cat_init_mutex);
789 xbt_dynar_free(&xbt_log_settings);
790 log_cat_exit(&_XBT_LOGV(XBT_LOG_ROOT_CAT));
793 /* Size of the static string in which we build the log string */
794 #define XBT_LOG_STATIC_BUFFER_SIZE 2048
795 /* Minimum size of the dynamic string in which we build the log string
796 (should be greater than XBT_LOG_STATIC_BUFFER_SIZE) */
797 #define XBT_LOG_DYNAMIC_BUFFER_SIZE 4096
799 void _xbt_log_event_log(xbt_log_event_t ev, const char *fmt, ...)
801 xbt_log_category_t cat = ev->cat;
803 xbt_assert(ev->priority >= 0, "Negative logging priority naturally forbidden");
804 xbt_assert(ev->priority < sizeof(xbt_log_priority_names), "Priority %d is greater than the biggest allowed value",
808 xbt_log_appender_t appender = cat->appender;
811 continue; /* No appender, try next */
813 xbt_assert(cat->layout, "No valid layout for the appender of category %s", cat->name);
815 /* First, try with a static buffer */
816 if (XBT_LOG_STATIC_BUFFER_SIZE) {
817 char buff[XBT_LOG_STATIC_BUFFER_SIZE];
820 ev->buffer_size = sizeof buff;
821 va_start(ev->ap, fmt);
822 done = cat->layout->do_layout(cat->layout, ev, fmt);
825 appender->do_append(appender, buff);
826 continue; /* Ok, that worked: go next */
830 /* The static buffer was too small, use a dynamically expanded one */
831 ev->buffer_size = XBT_LOG_DYNAMIC_BUFFER_SIZE;
832 ev->buffer = xbt_malloc(ev->buffer_size);
835 va_start(ev->ap, fmt);
836 done = cat->layout->do_layout(cat->layout, ev, fmt);
840 ev->buffer_size *= 2;
841 ev->buffer = xbt_realloc(ev->buffer, ev->buffer_size);
843 appender->do_append(appender, ev->buffer);
844 xbt_free(ev->buffer);
846 } while (cat->additivity && (cat = cat->parent, 1));
849 #undef XBT_LOG_DYNAMIC_BUFFER_SIZE
850 #undef XBT_LOG_STATIC_BUFFER_SIZE
854 * The standard logging macros use _XBT_LOG_ISENABLED, which calls _xbt_log_cat_init(). Thus, if we want to avoid an
855 * infinite recursion, we can not use the standard logging macros in _xbt_log_cat_init(), and in all functions called
858 * To circumvent the problem, we define the macro_xbt_log_init() as (0) for the length of the affected functions, and
859 * we do not forget to undefine it at the end!
862 static void _xbt_log_cat_apply_set(xbt_log_category_t category, xbt_log_setting_t setting)
864 #define _xbt_log_cat_init(a, b) (0)
866 if (setting->thresh != xbt_log_priority_uninitialized) {
867 xbt_log_threshold_set(category, setting->thresh);
869 XBT_DEBUG("Apply settings for category '%s': set threshold to %s (=%d)",
870 category->name, xbt_log_priority_names[category->threshold], category->threshold);
874 xbt_log_layout_set(category, xbt_log_layout_format_new(setting->fmt));
876 XBT_DEBUG("Apply settings for category '%s': set format to %s", category->name, setting->fmt);
879 if (setting->additivity != -1) {
880 xbt_log_additivity_set(category, setting->additivity);
882 XBT_DEBUG("Apply settings for category '%s': set additivity to %s",
883 category->name, (setting->additivity ? "on" : "off"));
885 if (setting->appender) {
886 xbt_log_appender_set(category, setting->appender);
887 if (!category->layout)
888 xbt_log_layout_set(category, xbt_log_layout_simple_new(NULL));
889 category->additivity = 0;
890 XBT_DEBUG("Set %p as appender of category '%s'", setting->appender, category->name);
892 #undef _xbt_log_cat_init
896 * This gets called the first time a category is referenced and performs the initialization.
897 * Also resets threshold to inherited!
899 int _xbt_log_cat_init(xbt_log_category_t category, e_xbt_log_priority_t priority)
901 #define _xbt_log_cat_init(a, b) (0)
903 if (log_cat_init_mutex != NULL)
904 xbt_os_mutex_acquire(log_cat_init_mutex);
906 if (category->initialized) {
907 if (log_cat_init_mutex != NULL)
908 xbt_os_mutex_release(log_cat_init_mutex);
909 return priority >= category->threshold;
913 xbt_log_setting_t setting = NULL;
916 XBT_DEBUG("Initializing category '%s' (firstChild=%s, nextSibling=%s)", category->name,
917 (category->firstChild ? category->firstChild->name : "none"),
918 (category->nextSibling ? category->nextSibling->name : "none"));
920 if (category == &_XBT_LOGV(XBT_LOG_ROOT_CAT)) {
921 category->threshold = xbt_log_priority_info;
922 category->appender = xbt_log_default_appender;
923 category->layout = xbt_log_default_layout;
925 if (!category->parent)
926 category->parent = &_XBT_LOGV(XBT_LOG_ROOT_CAT);
928 XBT_DEBUG("Set %s (%s) as father of %s ", category->parent->name,
929 (category->parent->initialized ? xbt_log_priority_names[category->parent->threshold] : "uninited"),
931 xbt_log_parent_set(category, category->parent);
933 if (XBT_LOG_ISENABLED(log, xbt_log_priority_debug)) {
934 char *buf, *res = NULL;
935 xbt_log_category_t cpp = category->parent->firstChild;
938 buf = bprintf("%s %s", res, cpp->name);
942 res = xbt_strdup(cpp->name);
944 cpp = cpp->nextSibling;
947 XBT_DEBUG("Children of %s: %s; nextSibling: %s", category->parent->name, res,
948 (category->parent->nextSibling ? category->parent->nextSibling->name : "none"));
954 /* Apply the control */
955 if (xbt_log_settings) {
956 xbt_assert(category, "NULL category");
957 xbt_assert(category->name);
959 xbt_dynar_foreach(xbt_log_settings, cursor, setting) {
960 xbt_assert(setting, "Damnit, NULL cat in the list");
961 xbt_assert(setting->catname, "NULL setting(=%p)->catname", (void *) setting);
963 if (!strcmp(setting->catname, category->name)) {
965 _xbt_log_cat_apply_set(category, setting);
966 xbt_dynar_cursor_rm(xbt_log_settings, &cursor);
971 XBT_DEBUG("Category '%s': inherited threshold = %s (=%d)",
972 category->name, xbt_log_priority_names[category->threshold], category->threshold);
975 category->initialized = 1;
976 if (log_cat_init_mutex != NULL)
977 xbt_os_mutex_release(log_cat_init_mutex);
978 return priority >= category->threshold;
980 #undef _xbt_log_cat_init
983 void xbt_log_parent_set(xbt_log_category_t cat, xbt_log_category_t parent)
985 xbt_assert(cat, "NULL category to be given a parent");
986 xbt_assert(parent, "The parent category of %s is NULL", cat->name);
988 /* if the category is initialized, unlink from current parent */
989 if (cat->initialized) {
990 xbt_log_category_t *cpp = &cat->parent->firstChild;
992 while (*cpp != cat && *cpp != NULL) {
993 cpp = &(*cpp)->nextSibling;
996 xbt_assert(*cpp == cat);
997 *cpp = cat->nextSibling;
1000 cat->parent = parent;
1001 cat->nextSibling = parent->firstChild;
1003 parent->firstChild = cat;
1005 if (!parent->initialized)
1006 _xbt_log_cat_init(parent, xbt_log_priority_uninitialized /* ignored */ );
1008 cat->threshold = parent->threshold;
1010 cat->isThreshInherited = 1;
1013 static void _set_inherited_thresholds(xbt_log_category_t cat)
1015 xbt_log_category_t child = cat->firstChild;
1017 for (; child != NULL; child = child->nextSibling) {
1018 if (child->isThreshInherited) {
1019 if (cat != &_XBT_LOGV(log))
1020 XBT_VERB("Set category threshold of %s to %s (=%d)",
1021 child->name, xbt_log_priority_names[cat->threshold], cat->threshold);
1022 child->threshold = cat->threshold;
1023 _set_inherited_thresholds(child);
1028 void xbt_log_threshold_set(xbt_log_category_t cat, e_xbt_log_priority_t threshold)
1030 cat->threshold = threshold;
1031 cat->isThreshInherited = 0;
1033 _set_inherited_thresholds(cat);
1036 static xbt_log_setting_t _xbt_log_parse_setting(const char *control_string)
1038 const char *orig_control_string = control_string;
1039 xbt_log_setting_t set = xbt_new(s_xbt_log_setting_t, 1);
1040 const char *name, *dot, *eq;
1042 set->catname = NULL;
1043 set->thresh = xbt_log_priority_uninitialized;
1045 set->additivity = -1;
1046 set->appender = NULL;
1048 if (!*control_string)
1050 XBT_DEBUG("Parse log setting '%s'", control_string);
1052 control_string += strspn(control_string, " ");
1053 name = control_string;
1054 control_string += strcspn(control_string, ".= ");
1055 dot = control_string;
1056 control_string += strcspn(control_string, ":= ");
1057 eq = control_string;
1059 if(*dot != '.' && (*eq == '=' || *eq == ':'))
1060 xbt_die ("Invalid control string '%s'", orig_control_string);
1062 if (!strncmp(dot + 1, "threshold", (size_t) (eq - dot - 1))) {
1064 char *neweq = xbt_strdup(eq + 1);
1065 char *p = neweq - 1;
1067 while (*(++p) != '\0') {
1068 if (*p >= 'a' && *p <= 'z') {
1073 XBT_DEBUG("New priority name = %s", neweq);
1074 for (i = 0; i < xbt_log_priority_infinite; i++) {
1075 if (!strncmp(xbt_log_priority_names[i], neweq, p - eq)) {
1076 XBT_DEBUG("This is priority %d", i);
1081 if(i<XBT_LOG_STATIC_THRESHOLD){
1083 "Priority '%s' (in setting '%s') is above allowed priority '%s'.\n\n"
1084 "Compiling SimGrid with -DNDEBUG forbids the levels 'trace' and 'debug'\n"
1085 "while -DNLOG forbids any logging, at any level.",
1086 eq + 1, name, xbt_log_priority_names[XBT_LOG_STATIC_THRESHOLD]);
1088 }else if (i < xbt_log_priority_infinite) {
1089 set->thresh = (e_xbt_log_priority_t) i;
1091 THROWF(arg_error, 0,
1092 "Unknown priority name: %s (must be one of: trace,debug,verbose,info,warning,error,critical)", eq + 1);
1095 } else if (!strncmp(dot + 1, "add", (size_t) (eq - dot - 1)) ||
1096 !strncmp(dot + 1, "additivity", (size_t) (eq - dot - 1))) {
1097 char *neweq = xbt_strdup(eq + 1);
1098 char *p = neweq - 1;
1100 while (*(++p) != '\0') {
1101 if (*p >= 'a' && *p <= 'z') {
1105 if (!strcmp(neweq, "ON") || !strcmp(neweq, "YES") || !strcmp(neweq, "1")) {
1106 set->additivity = 1;
1108 set->additivity = 0;
1111 } else if (!strncmp(dot + 1, "app", (size_t) (eq - dot - 1)) ||
1112 !strncmp(dot + 1, "appender", (size_t) (eq - dot - 1))) {
1113 char *neweq = xbt_strdup(eq + 1);
1115 if (!strncmp(neweq, "file:", 5)) {
1116 set->appender = xbt_log_appender_file_new(neweq + 5);
1117 }else if (!strncmp(neweq, "rollfile:", 9)) {
1118 set->appender = xbt_log_appender2_file_new(neweq + 9,1);
1119 }else if (!strncmp(neweq, "splitfile:", 10)) {
1120 set->appender = xbt_log_appender2_file_new(neweq + 10,0);
1122 THROWF(arg_error, 0, "Unknown appender log type: '%s'", neweq);
1125 } else if (!strncmp(dot + 1, "fmt", (size_t) (eq - dot - 1))) {
1126 set->fmt = xbt_strdup(eq + 1);
1129 snprintf(buff, MIN(512, eq - dot), "%s", dot + 1);
1130 THROWF(arg_error, 0, "Unknown setting of the log category: '%s'", buff);
1132 set->catname = (char *) xbt_malloc(dot - name + 1);
1134 memcpy(set->catname, name, dot - name);
1135 set->catname[dot - name] = '\0'; /* Just in case */
1136 XBT_DEBUG("This is for cat '%s'", set->catname);
1141 static xbt_log_category_t _xbt_log_cat_searchsub(xbt_log_category_t cat, char *name)
1143 xbt_log_category_t child, res;
1145 XBT_DEBUG("Search '%s' into '%s' (firstChild='%s'; nextSibling='%s')", name,
1146 cat->name, (cat->firstChild ? cat->firstChild->name : "none"),
1147 (cat->nextSibling ? cat->nextSibling->name : "none"));
1148 if (!strcmp(cat->name, name))
1151 for (child = cat->firstChild; child != NULL; child = child->nextSibling) {
1152 XBT_DEBUG("Dig into %s", child->name);
1153 res = _xbt_log_cat_searchsub(child, name);
1163 * \param control_string What to parse
1165 * Typically passed a command-line argument. The string has the syntax:
1167 * ( [category] "." [keyword] ":" value (" ")... )...
1169 * where [category] is one the category names (see \ref XBT_log_cats for a complete list of the ones defined in the
1170 * SimGrid library) and keyword is one of the following:
1172 * - thres: category's threshold priority. Possible values:
1173 * TRACE,DEBUG,VERBOSE,INFO,WARNING,ERROR,CRITICAL
1174 * - add or additivity: whether the logging actions must be passed to the parent category.
1175 * Possible values: 0, 1, no, yes, on, off.
1176 * Default value: yes.
1177 * - fmt: the format to use. See \ref log_use_conf_fmt for more information.
1178 * - app or appender: the appender to use. See \ref log_use_conf_app for more information.
1180 void xbt_log_control_set(const char *control_string)
1182 xbt_log_setting_t set;
1184 /* To split the string in commands, and the cursors */
1185 xbt_dynar_t set_strings;
1189 if (!control_string)
1191 XBT_DEBUG("Parse log settings '%s'", control_string);
1193 /* Special handling of no_loc request, which asks for any file localization to be omitted (for tesh runs) */
1194 if (!strcmp(control_string, "no_loc")) {
1198 /* some initialization if this is the first time that this get called */
1199 if (xbt_log_settings == NULL)
1200 xbt_log_settings = xbt_dynar_new(sizeof(xbt_log_setting_t), _free_setting);
1202 /* split the string, and remove empty entries */
1203 set_strings = xbt_str_split_quoted(control_string);
1205 if (xbt_dynar_is_empty(set_strings)) { /* vicious user! */
1206 xbt_dynar_free(&set_strings);
1210 /* Parse each entry and either use it right now (if the category was already created), or store it for further use */
1211 xbt_dynar_foreach(set_strings, cpt, str) {
1212 xbt_log_category_t cat = NULL;
1214 set = _xbt_log_parse_setting(str);
1215 cat = _xbt_log_cat_searchsub(&_XBT_LOGV(XBT_LOG_ROOT_CAT), set->catname);
1218 XBT_DEBUG("Apply directly");
1219 _xbt_log_cat_apply_set(cat, set);
1220 _free_setting((void *) &set);
1222 XBT_DEBUG("Store for further application");
1223 XBT_DEBUG("push %p to the settings", (void *) set);
1224 xbt_dynar_push(xbt_log_settings, &set);
1227 xbt_dynar_free(&set_strings);
1230 void xbt_log_appender_set(xbt_log_category_t cat, xbt_log_appender_t app)
1232 if (cat->appender) {
1233 if (cat->appender->free_)
1234 cat->appender->free_(cat->appender);
1235 free(cat->appender);
1237 cat->appender = app;
1240 void xbt_log_layout_set(xbt_log_category_t cat, xbt_log_layout_t lay)
1242 #define _xbt_log_cat_init(a, b) (0)
1243 if (!cat->appender) {
1244 XBT_VERB ("No appender to category %s. Setting the file appender as default", cat->name);
1245 xbt_log_appender_set(cat, xbt_log_appender_file_new(NULL));
1248 if (cat->layout->free_) {
1249 cat->layout->free_(cat->layout);
1254 xbt_log_additivity_set(cat, 0);
1255 #undef _xbt_log_cat_init
1258 void xbt_log_additivity_set(xbt_log_category_t cat, int additivity)
1260 cat->additivity = additivity;
1263 static void xbt_log_help(void)
1266 "Description of the logging output:\n"
1268 " Threshold configuration: --log=CATEGORY_NAME.thres:PRIORITY_LEVEL\n"
1269 " CATEGORY_NAME: defined in code with function 'XBT_LOG_NEW_CATEGORY'\n"
1270 " PRIORITY_LEVEL: the level to print (trace,debug,verbose,info,warning,error,critical)\n"
1271 " -> trace: enter and return of some functions\n"
1272 " -> debug: crufty output\n"
1273 " -> verbose: verbose output for the user wanting more\n"
1274 " -> info: output about the regular functionning\n"
1275 " -> warning: minor issue encountered\n"
1276 " -> error: issue encountered\n"
1277 " -> critical: major issue encountered\n"
1279 " Format configuration: --log=CATEGORY_NAME.fmt:OPTIONS\n"
1280 " OPTIONS may be:\n"
1281 " -> %%%%: the %% char\n"
1282 " -> %%n: platform-dependent line separator (LOG4J compatible)\n"
1283 " -> %%e: plain old space (SimGrid extension)\n"
1285 " -> %%m: user-provided message\n"
1287 " -> %%c: Category name (LOG4J compatible)\n"
1288 " -> %%p: Priority name (LOG4J compatible)\n"
1290 " -> %%h: Hostname (SimGrid extension)\n"
1291 " -> %%P: Process name (SimGrid extension)\n"
1292 " -> %%t: Thread \"name\" (LOG4J compatible -- actually the address of the thread in memory)\n"
1293 " -> %%i: Process PID (SimGrid extension -- this is a 'i' as in 'i'dea)\n"
1295 " -> %%F: file name where the log event was raised (LOG4J compatible)\n"
1296 " -> %%l: location where the log event was raised (LOG4J compatible, like '%%F:%%L' -- this is a l as in 'l'etter)\n"
1297 " -> %%L: line number where the log event was raised (LOG4J compatible)\n"
1298 " -> %%M: function name (LOG4J compatible -- called method name here of course).\n"
1299 " Defined only when using gcc because there is no __FUNCTION__ elsewhere.\n"
1301 " -> %%b: full backtrace (Called %%throwable in LOG4J). Defined only under windows or when using the GNU libc because\n"
1302 " backtrace() is not defined elsewhere, and we only have a fallback for windows boxes, not mac ones for example.\n"
1303 " -> %%B: short backtrace (only the first line of the %%b). Called %%throwable{short} in LOG4J; defined where %%b is.\n"
1305 " -> %%d: date (UNIX-like epoch)\n"
1306 " -> %%r: application age (time elapsed since the beginning of the application)\n"
1309 " --help-log-categories Display the current hierarchy of log categories.\n"
1310 " --log=no_loc Don't print file names in messages (for tesh tests).\n"
1315 static int xbt_log_cat_cmp(const void *pa, const void *pb)
1317 xbt_log_category_t a = *(xbt_log_category_t *)pa;
1318 xbt_log_category_t b = *(xbt_log_category_t *)pb;
1319 return strcmp(a->name, b->name);
1322 static void xbt_log_help_categories_rec(xbt_log_category_t category, const char *prefix)
1328 xbt_log_category_t cat;
1333 if (category->parent) {
1334 this_prefix = bprintf("%s \\_ ", prefix);
1335 child_prefix = bprintf("%s | ", prefix);
1337 this_prefix = xbt_strdup(prefix);
1338 child_prefix = xbt_strdup(prefix);
1341 dynar = xbt_dynar_new(sizeof(xbt_log_category_t), NULL);
1342 for (cat = category ; cat != NULL; cat = cat->nextSibling)
1343 xbt_dynar_push_as(dynar, xbt_log_category_t, cat);
1345 xbt_dynar_sort(dynar, xbt_log_cat_cmp);
1347 for (i = 0; i < xbt_dynar_length(dynar); i++) {
1348 if (i == xbt_dynar_length(dynar) - 1 && category->parent)
1349 *strrchr(child_prefix, '|') = ' ';
1350 cat = xbt_dynar_get_as(dynar, i, xbt_log_category_t);
1351 printf("%s%s: %s\n", this_prefix, cat->name, cat->description);
1352 xbt_log_help_categories_rec(cat->firstChild, child_prefix);
1355 xbt_dynar_free(&dynar);
1356 xbt_free(this_prefix);
1357 xbt_free(child_prefix);
1360 static void xbt_log_help_categories(void)
1362 printf("Current log category hierarchy:\n");
1363 xbt_log_help_categories_rec(&_XBT_LOGV(XBT_LOG_ROOT_CAT), " ");