X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/8c354c48ec90c997cc7213ce96ca97d882934166..f4c515a7b473a123f6bb722fdb588b04c807d126:/src/xbt/log.c diff --git a/src/xbt/log.c b/src/xbt/log.c index 65ca648fb7..834acb2731 100644 --- a/src/xbt/log.c +++ b/src/xbt/log.c @@ -2,369 +2,1087 @@ /* log - a generic logging facility in the spirit of log4j */ -/* Copyright (c) 2004 Martin Quinson. All rights reserved. */ +/* Copyright (c) 2003-2007 Martin Quinson. All rights reserved. */ /* This program is free software; you can redistribute it and/or modify it * under the terms of the license (GNU LGPL) which comes with this package. */ + #include #include +#include /* snprintf */ +#include /* snprintf */ + +#include "portable.h" /* to get a working stdarg.h */ #include "xbt_modinter.h" #include "xbt/misc.h" +#include "xbt/ex.h" +#include "xbt/str.h" #include "xbt/sysdep.h" -#include "xbt/log.h" -#include "xbt/error.h" +#include "xbt/log_private.h" #include "xbt/dynar.h" +XBT_PUBLIC_DATA(int) (*xbt_pid)(); + +/** \addtogroup XBT_log + * + * This section describes the API to the log functions used + * everywhere in this project. + +\section XBT_log_toc Table of contents + + - \ref log_overview + - \ref log_cat + - \ref log_pri + - \ref log_app + - \ref log_hist + - \ref log_API + - \ref log_API_cat + - \ref log_API_pri + - \ref log_API_isenabled + - \ref log_API_subcat + - \ref log_API_easy + - \ref log_API_example + - \ref log_user + - \ref log_use_conf + - \ref log_use_conf_thres + - \ref log_use_conf_multi + - \ref log_use_conf_fmt + - \ref log_use_conf_app + - \ref log_use_conf_add + - \ref log_use_misc + - \ref log_internals + - \ref log_in_perf + - \ref log_in_app + - \ref XBT_log_cats + +\section log_overview 1. Introduction + +This module is in charge of handling the log messages of every SimGrid +program. The main design goal are: + + - configurability: the user can choose at runtime what messages to show and + what to hide, as well as how messages get displayed. + - ease of use: both to the programmer (using preprocessor macros black magic) + and to the user (with command line options) + - performances: logging shouldn't slow down the program when turned off, for example + - deal with distributed settings: SimGrid programs are [often] distributed ones, + and the logging mechanism allows to syndicate each and every log source into the same place. + At least, its design would allow to, once we write the last missing pieces + +There is three main concepts in SimGrid's logging mechanism: category, +priority and appender. These three concepts work together to +enable developers to log messages according to message type and priority, and +to control at runtime how these messages are formatted and where they are +reported. + +\subsection log_cat 1.1 Category hierarchy + +The first and foremost advantage of any logging API over plain printf() +resides in its ability to disable certain log statements while allowing +others to print unhindered. This capability assumes that the logging space, +that is, the space of all possible logging statements, is categorized +according to some developer-chosen criteria. + +This observation led to choosing category as the central concept of the +system. In a certain sense, they can be considered as logging topics or +channels. + +\subsection log_pri 1.2 Logging priorities + +The user can naturally declare interest into this or that logging category, but +he also can specify the desired level of details for each of them. This is +controlled by the priority concept (which should maybe be renamed to +severity). + +Empirically, the user can specify that he wants to see every debugging message +of GRAS while only being interested into the messages at level "error" or +higher about the XBT internals. + +\subsection log_app 1.3 Message appenders + +The message appenders are the elements in charge of actually displaying the +message to the user. For now, only two appenders exist: the default one prints +stuff on stderr while it is possible to create appenders printing to a specific +file. + +Other are planed (such as the one sending everything to a remote server, +or the one using only a fixed amount of lines in a file, and rotating content on +need). One day, for sure ;) + +\subsection log_lay 1.4 Message layouts + +The message layouts are the elements in charge of choosing how each message +will look like. Their result is a string which is then passed to the appender +attached to the category to be displayed. + +For now, there is two layouts: The simple one, which is good for most cases, +and another one allowing users to specify the format they want. +\ref log_use_conf provides more info on this. + +\subsection log_hist 1.5 History of this module + +Historically, this module is an adaptation of the log4c project, which is dead +upstream, and which I was given the permission to fork under the LGPL licence +by the log4c's authors. The log4c project itself was loosely based on the +Apache project's Log4J, which also inspired Log4CC, Log4py and so on. Our work +differs somehow from these projects anyway, because the C programming language +is not object oriented. + +\section log_API 2. Programmer interface + +\subsection log_API_cat 2.1 Constructing the category hierarchy + +Every category is declared by providing a name and an optional +parent. If no parent is explicitly named, the root category, LOG_ROOT_CAT is +the category's parent. + +A category is created by a macro call at the top level of a file. A +category can be created with any one of the following macros: + + - \ref XBT_LOG_NEW_CATEGORY(MyCat,desc); Create a new root + - \ref XBT_LOG_NEW_SUBCATEGORY(MyCat, ParentCat,desc); + Create a new category being child of the category ParentCat + - \ref XBT_LOG_NEW_DEFAULT_CATEGORY(MyCat,desc); + Like XBT_LOG_NEW_CATEGORY, but the new category is the default one + in this file + - \ref XBT_LOG_NEW_DEFAULT_SUBCATEGORY(MyCat, ParentCat,desc); + Like XBT_LOG_NEW_SUBCATEGORY, but the new category is the default one + in this file + +The parent cat can be defined in the same file or in another file (in +which case you want to use the \ref XBT_LOG_EXTERNAL_CATEGORY macro to make +it visible in the current file), but each category may have only one +definition. Likewise, you can use a category defined in another file as +default one using \ref XBT_LOG_EXTERNAL_DEFAULT_CATEGORY + +Typically, there will be a Category for each module and sub-module, so you +can independently control logging for each module. + +For a list of all existing categories, please refer to the \ref XBT_log_cats +section. This file is generated automatically from the SimGrid source code, so +it should be complete and accurate. + +\section log_API_pri 2.2 Declaring message priority + +A category may be assigned a threshold priority. The set of priorities are +defined by the \ref e_xbt_log_priority_t enum. All logging request under +this priority will be discarded. + +If a given category is not assigned a threshold priority, then it inherits +one from its closest ancestor with an assigned threshold. To ensure that all +categories can eventually inherit a threshold, the root category always has +an assigned threshold priority. + +Logging requests are made by invoking a logging macro on a category. All of +the macros have a printf-style format string followed by arguments. If you +compile with the -Wall option, gcc will warn you for unmatched arguments, ie +when you pass a pointer to a string where an integer was specified by the +format. This is usually a good idea. + +Because some C compilers do not support vararg macros, there is a version of +the macro for any number of arguments from 0 to 6. The macro name ends with +the total number of arguments. + +Here is an example of the most basic type of macro. This is a logging +request with priority warning. + +CLOG5(MyCat, gras_log_priority_warning, "Values are: %d and '%s'", 5, +"oops"); + +A logging request is said to be enabled if its priority is higher than or +equal to the threshold priority of its category. Otherwise, the request is +said to be disabled. A category without an assigned priority will inherit +one from the hierarchy. + +It is possible to use any non-negative integer as a priority. If, as in the +example, one of the standard priorities is used, then there is a convenience +macro that is typically used instead. For example, the above example is +equivalent to the shorter: + +CWARN4(MyCat, "Values are: %d and '%s'", 5, "oops"); + +\section log_API_isenabled 2.3 Checking if a particular category/priority is enabled + +It is sometimes useful to check whether a particular category is +enabled at a particular priority. One example is when you want to do +some extra computation to prepare a nice debugging message. There is +no use of doing so if the message won't be used afterward because +debugging is turned off. + +Doing so is extremely easy, thanks to the XBT_LOG_ISENABLED(category, priority). + +\section log_API_subcat 2.4 Using a default category (the easy interface) + +If \ref XBT_LOG_NEW_DEFAULT_SUBCATEGORY(MyCat, Parent) or +\ref XBT_LOG_NEW_DEFAULT_CATEGORY(MyCat) is used to create the +category, then the even shorter form can be used: + +WARN3("Values are: %s and '%d'", 5, "oops"); + +Only one default category can be created per file, though multiple +non-defaults can be created and used. + +\section log_API_easy 2.5 Putting all together: the easy interface + +First of all, each module should register its own category into the categories +tree using \ref XBT_LOG_NEW_DEFAULT_SUBCATEGORY. + +Then, logging should be done with the DEBUG, VERB, INFO, WARN, +ERROR or CRITICAL macro families (such as #DEBUG10, #VERB10, +#INFO10, #WARN10, #ERROR10 and #CRITICAL10). For each group, there is at +least 11 different macros (like DEBUG0, DEBUG1, DEBUG2, DEBUG3, DEBUG4 and +DEBUG5, DEBUG6, DEBUG7, DEBUG8, DEBUG9, DEBUG10), only differing in the number of arguments passed along the format. +This is because we want SimGrid itself to keep compilable on ancient +compiler not supporting variable number of arguments to macros. But we +should provide a macro simpler to use for the users not interested in SP3 +machines (FIXME). + +Under GCC, these macro check there arguments the same way than printf does. So, +if you compile with -Wall, the following code will issue a warning: +DEBUG2("Found %s (id %f)", some_string, a_double) + +If you want to specify the category to log onto (for example because you +have more than one category per file, add a C before the name of the log +producing macro (ie, use #CDEBUG10, #CVERB10, #CINFO10, #CWARN10, #CERROR10 and +#CCRITICAL10 and friends), and pass the category name as first argument. + +The TRACE priority is not used the same way than the other. You should use +the #XBT_IN, XBT_IN (up to #XBT_IN5), #XBT_OUT and #XBT_HERE macros +instead. + +\section log_API_example 2.6 Example of use + +Here is a more complete example: + +\verbatim +#include "xbt/log.h" + +/ * create a category and a default subcategory * / +XBT_LOG_NEW_CATEGORY(VSS); +XBT_LOG_NEW_DEFAULT_SUBCATEGORY(SA, VSS); + +int main() { + / * Now set the parent's priority. (the string would typcially be a runtime option) * / + xbt_log_control_set("SA.thresh:3"); + + / * This request is enabled, because WARNING >= INFO. * / + CWARN2(VSS, "Low fuel level."); + + / * This request is disabled, because DEBUG < INFO. * / + CDEBUG2(VSS, "Starting search for nearest gas station."); + + / * The default category SA inherits its priority from VSS. Thus, + the following request is enabled because INFO >= INFO. * / + INFO1("Located nearest gas station."); + + / * This request is disabled, because DEBUG < INFO. * / + DEBUG1("Exiting gas station search"); +} +\endverbatim + +Another example can be found in the relevant part of the GRAS tutorial: +\ref GRAS_tut_tour_logs. + +\section log_user 3. User interface + +\section log_use_conf 3.1 Configuration + +Although rarely done, it is possible to configure the logs during +program initialization by invoking the xbt_log_control_set() method +manually. A more conventional way is to use the --log command line +argument. xbt_init() (called by MSG_init(), gras_init() and friends) +checks and deals properly with such arguments. + +The following command line arguments exist, but are deprecated and +may disappear in the future: --xbt-log, --gras-log, --msg-log and +--surf-log. + +\subsection log_use_conf_thres 3.1.1 Threshold configuration + +The most common setting is to control which logging event will get +displayed by setting a threshold to each category through the +thres keyword. + +For example, \verbatim --log=root.thres:debug\endverbatim will make +SimGrid extremely verbose while \verbatim +--log=root.thres:critical\endverbatim should shut it almost +completely off. + +\subsection log_use_conf_multi 3.1.2 Passing several settings + +You can provide several of those arguments to change the setting of several +categories, they will be applied from left to right. So, +\verbatim --log="root.thres:debug root.thres:critical"\endverbatim should +disable almost any logging. + +Note that the quotes on above line are mandatory because there is a space in +the argument, so we are protecting ourselves from the shell, not from SimGrid. +We could also reach the same effect with this: +\verbatim --log=root.thres:debug --log=root.thres:critical\endverbatim + +\subsection log_use_conf_fmt 3.1.3 Format configuration + +As with SimGrid 3.3, it is possible to control the format of log +messages. This is done through the fmt keyword. For example, +\verbatim --log=root.fmt:%m\endverbatim reduces the output to the +user-message only, removing any decoration such as the date, or the +process ID, everything. + +Here are the existing format directives: + + - %%: the % char + - %%n: platform-dependent line separator (LOG4J compatible) + - %%e: plain old space (SimGrid extension) + + - %%m: user-provided message + + - %%c: Category name (LOG4J compatible) + - %%p: Priority name (LOG4J compatible) + + - %%h: Hostname (SimGrid extension) + - %%P: Process name (SimGrid extension) + - %%t: Thread "name" (LOG4J compatible -- actually the address of the thread in memory) + - %%i: Process PID (SimGrid extension -- this is a 'i' as in 'i'dea) + + - %%F: file name where the log event was raised (LOG4J compatible) + - %%l: location where the log event was raised (LOG4J compatible, like '%%F:%%L' -- this is a l as in 'l'etter) + - %%L: line number where the log event was raised (LOG4J compatible) + - %%M: function name (LOG4J compatible -- called method name here of course). + Defined only when using gcc because there is no __FUNCTION__ elsewhere. + + - %%b: full backtrace (Called %%throwable in LOG4J). + Defined only under windows or when using the GNU libc because backtrace() is not defined + elsewhere, and we only have a fallback for windows boxes, not mac ones for example. + - %%B: short backtrace (only the first line of the %%b). + Called %%throwable{short} in LOG4J; defined where %%b is. + + - %%d: date (UNIX-like epoch) + - %%r: application age (time elapsed since the beginning of the application) + + +If you want to mimic the simple layout with the format one, you would use this +format: '[%%h:%%i:(%%I) %%r] %%l: [%%c/%%p] %%m%%n'. This is not completely correct +because the simple layout do not display the message location for messages at +priority INFO (thus, the fmt is '[%%h:%%i:(%%I) %%r] %%l: [%%c/%%p] %%m%%n' in this +case). Moreover, if there is no process name (ie, messages coming from the +library itself, or test programs doing strange things) do not display the +process identity (thus, fmt is '[%%r] %%l: [%%c/%%p] %%m%%n' in that case, and '[%%r] +[%%c/%%p] %%m%%n' if they are at priority INFO). + +For now, there is only one format modifier: the precision field. You +can for example specify %.4r to get the application age with 4 +numbers after the radix. Another limitation is that you cannot set +specific layouts to the several priorities. + +\subsection log_use_conf_app 3.1.4 Category appender + +As with SimGrid 3.3, it is possible to control the appender of log +messages. This is done through the app keyword. For example, +\verbatim --log=root.app:file:mylogfile\endverbatim redirects the output +to the file mylogfile. + +Any appender setup this way have its own layout format (simple one by default), +so you may have to change it too afterward. Moreover, the additivity of the log category +is also set to false to prevent log event displayed by this appender to "leak" to any other +appender higher in the hierarchy. If it is not what you wanted, you can naturally change it +manually. + +\subsection log_use_conf_add 3.1.5 Category additivity + +The add keyword allows to specify the additivity of a +category (see \ref log_in_app). '0', '1', 'no', 'yes', 'on' +and 'off' are all valid values, with 'yes' as default. + +The following example resets the additivity of the xbt category to true (which is its default value). +\verbatim --log=xbt.add:yes\endverbatim + +\section log_use_misc 3.2 Misc and Caveats + + - Do not use any of the macros that start with '_'. + - Log4J has a 'rolling file appender' which you can select with a run-time + option and specify the max file size. This would be a nice default for + non-kernel applications. + - Careful, category names are global variables. + +\section log_internals 4. Internal considerations + +This module is a mess of macro black magic, and when it goes wrong, +SimGrid studently loose its ability to explain its problems. When +messing around this module, I often find useful to define +XBT_LOG_MAYDAY (which turns it back to good old printf) for the time +of finding what's going wrong. But things are quite verbose when +everything is enabled... + +\section log_in_perf 4.1 Performance + +Except for the first invocation of a given category, a disabled logging request +requires an a single comparison of a static variable to a constant. + +There is also compile time constant, \ref XBT_LOG_STATIC_THRESHOLD, which +causes all logging requests with a lower priority to be optimized to 0 cost +by the compiler. By setting it to gras_log_priority_infinite, all logging +requests are statically disabled at compile time and cost nothing. Released executables +might be compiled with (note that it will prevent users to debug their problems) +\verbatim-DXBT_LOG_STATIC_THRESHOLD=gras_log_priority_infinite\endverbatim + +Compiling with the \verbatim-DNLOG\endverbatim option disables all logging +requests at compilation time while the \verbatim-DNDEBUG\endverbatim disables +the requests of priority below INFO. + +\todo Logging performance *may* be improved further by improving the message +propagation from appender to appender in the category tree. + +\section log_in_app 4.2 Appenders + +Each category has an optional appender. An appender is a pointer to a +structure which starts with a pointer to a do_append() function. do_append() +prints a message to a log. + +When a category is passed a message by one of the logging macros, the +category performs the following actions: + + - if the category has an appender, the message is passed to the + appender's do_append() function, + - if additivity is true for the category, the message is passed to + the category's parent. Additivity is true by default, and can be + controlled by xbt_log_additivity_set() or something like --log=root.add:1 (see \ref log_use_conf_add). + Also, when you add an appender to a category, its additivity is automatically turned to off. + Turn it back on afterward if it is not what you wanted. + +By default, only the root category have an appender, and any other category has +its additivity set to true. This causes all messages to be logged by the root +category's appender. + +The default appender function currently prints to stderr, and the only other +existing one writes to the specified file. More would be needed, like the one +able to send the logs to a remote dedicated server. +This is on our TODO list for quite a while now, but your help would be +welcome here, too. + + + *//*'*/ + + +xbt_log_appender_t xbt_log_default_appender = NULL; /* set in log_init */ +xbt_log_layout_t xbt_log_default_layout = NULL; /* set in log_init */ +int _log_usable = 0; + typedef struct { char *catname; e_xbt_log_priority_t thresh; + char *fmt; + int additivity; + xbt_log_appender_t appender; } s_xbt_log_setting_t,*xbt_log_setting_t; static xbt_dynar_t xbt_log_settings=NULL; + static void _free_setting(void *s) { - xbt_log_setting_t set=(xbt_log_setting_t)s; + xbt_log_setting_t set=*(xbt_log_setting_t*)s; if (set) { - xbt_free(set->catname); -/* xbt_free(set); FIXME: uncommenting this leads to segfault when more than one chunk is passed as gras-log */ + free(set->catname); + if (set->fmt) + free(set->fmt); + free(set); } } +static void _xbt_log_cat_apply_set(xbt_log_category_t category, + xbt_log_setting_t setting); const char *xbt_log_priority_names[8] = { - "NONE", - "TRACE", - "DEBUG", - "VERBOSE", - "INFO", - "WARNING", - "ERROR", - "CRITICAL" + "NONE", + "TRACE", + "DEBUG", + "VERBOSE", + "INFO", + "WARNING", + "ERROR", + "CRITICAL" }; s_xbt_log_category_t _XBT_LOGV(XBT_LOG_ROOT_CAT) = { - 0, 0, 0, - "root", xbt_log_priority_uninitialized, 0, - NULL, 0 + NULL /*parent*/, NULL /* firstChild */, NULL /* nextSibling */, + "root", xbt_log_priority_uninitialized /* threshold */, + 0 /* isThreshInherited */, + NULL /* appender */, NULL /* layout */, + 0 /* additivity */ }; -XBT_LOG_NEW_SUBCATEGORY(gras,XBT_LOG_ROOT_CAT,"All GRAS categories"); -XBT_LOG_NEW_SUBCATEGORY(xbt,XBT_LOG_ROOT_CAT,"All XBT categories (gras toolbox)"); -XBT_LOG_NEW_SUBCATEGORY(surf,XBT_LOG_ROOT_CAT,"All SURF categories"); -XBT_LOG_NEW_DEFAULT_SUBCATEGORY(log,xbt,"Loggings from the logging mecanism itself"); +XBT_LOG_NEW_CATEGORY(xbt,"All XBT categories (simgrid toolbox)"); +XBT_LOG_NEW_CATEGORY(surf,"All SURF categories"); +XBT_LOG_NEW_CATEGORY(msg,"All MSG categories"); +XBT_LOG_NEW_CATEGORY(simix,"All SIMIX categories"); +XBT_LOG_NEW_DEFAULT_SUBCATEGORY(log,xbt,"Loggings from the logging mechanism itself"); -static void _apply_control(xbt_log_category_t cat) { - int cursor; - xbt_log_setting_t setting=NULL; - int found = 0; +/** @brief Get all logging settings from the command line + * + * xbt_log_control_set() is called on each string we got from cmd line + */ +void xbt_log_init(int *argc,char **argv) { + int i,j; + char *opt; - if (!xbt_log_settings) - return; + /* create the default appender and install it in the root category, + which were already created (damnit. Too slow little beetle)*/ + xbt_log_default_appender = xbt_log_appender_file_new(NULL); + xbt_log_default_layout = xbt_log_layout_simple_new(NULL); + _XBT_LOGV(XBT_LOG_ROOT_CAT).appender = xbt_log_default_appender; + _XBT_LOGV(XBT_LOG_ROOT_CAT).layout = xbt_log_default_layout; + _log_usable = 1; - xbt_assert0(cat,"NULL category"); - xbt_assert(cat->name); + // _XBT_LOGV(log).threshold = xbt_log_priority_debug; /* uncomment to set the LOG category to debug directly */ - xbt_dynar_foreach(xbt_log_settings,cursor,setting) { - xbt_assert0(setting,"Damnit, NULL cat in the list"); - xbt_assert1(setting->catname,"NULL setting(=%p)->catname",(void*)setting); + /* Set logs and init log submodule */ + for (i=1; i<*argc; i++){ + if (!strncmp(argv[i],"--log=",strlen("--log=")) || + !strncmp(argv[i],"--gras-log=",strlen("--gras-log=")) || + !strncmp(argv[i],"--surf-log=",strlen("--surf-log=")) || + !strncmp(argv[i],"--msg-log=",strlen("--msg-log=")) || + !strncmp(argv[i],"--simix-log=",strlen("--simix-log=")) || + !strncmp(argv[i],"--xbt-log=",strlen("--xbt-log="))){ - if (!strcmp(setting->catname,cat->name)) { - found = 1; + if (strncmp(argv[i],"--log=",strlen("--log="))) + WARN2("Option %.*s is deprecated and will disapear in the future. Use --log instead.", + (int)(strchr(argv[i],'=')-argv[i]),argv[i]); - xbt_log_threshold_set(cat, setting->thresh); - xbt_dynar_cursor_rm(xbt_log_settings,&cursor); + opt=strchr(argv[i],'='); + opt++; + xbt_log_control_set(opt); + DEBUG1("Did apply '%s' as log setting",opt); + /*remove this from argv*/ - if (cat->threshold <= xbt_log_priority_verbose) { - s_xbt_log_event_t _log_ev = - {cat,xbt_log_priority_verbose,__FILE__,_XBT_GNUC_FUNCTION,__LINE__}; - _xbt_log_event_log(&_log_ev, - "Apply settings for category '%s': set threshold to %s (=%d)", - cat->name, - xbt_log_priority_names[cat->threshold], cat->threshold); + for (j=i+1; j<*argc; j++){ + argv[j-1] = argv[j]; } + + argv[j-1] = NULL; + (*argc)--; + i--; /* compensate effect of next loop incrementation */ } } - if (!found && cat->threshold <= xbt_log_priority_verbose) { - s_xbt_log_event_t _log_ev = - {cat,xbt_log_priority_verbose,__FILE__,_XBT_GNUC_FUNCTION,__LINE__}; - _xbt_log_event_log(&_log_ev, - "Category '%s': inherited threshold = %s (=%d)", - cat->name, - xbt_log_priority_names[cat->threshold], cat->threshold); +} + +static void log_cat_exit(xbt_log_category_t cat) { + xbt_log_category_t child; + + if (cat->appender) { + if (cat->appender->free_) + cat->appender->free_(cat->appender); + free(cat->appender); + } + if (cat->layout) { + if (cat->layout->free_) + cat->layout->free_(cat->layout); + free(cat->layout); } + for(child=cat->firstChild ; child != NULL; child = child->nextSibling) + log_cat_exit(child); +} + +void xbt_log_exit(void) { + VERB0("Exiting log"); + xbt_dynar_free(&xbt_log_settings); + log_cat_exit(&_XBT_LOGV(XBT_LOG_ROOT_CAT)); + _log_usable = 0; } void _xbt_log_event_log( xbt_log_event_t ev, const char *fmt, ...) { + xbt_log_category_t cat = ev->cat; + if (!_log_usable) { + /* Make sure that the layouts have been malloced */ + xbt_log_default_appender = xbt_log_appender_file_new(NULL); + xbt_log_default_layout = xbt_log_layout_simple_new(NULL); + _XBT_LOGV(XBT_LOG_ROOT_CAT).appender = xbt_log_default_appender; + _XBT_LOGV(XBT_LOG_ROOT_CAT).layout = xbt_log_default_layout; + _log_usable = 1; + } + va_start(ev->ap, fmt); + va_start(ev->ap_copy, fmt); while(1) { xbt_log_appender_t appender = cat->appender; if (appender != NULL) { - appender->do_append(appender, ev, fmt); + xbt_assert1(cat->layout,"No valid layout for the appender of category %s",cat->name); + cat->layout->do_layout(cat->layout, ev, fmt, appender); } - if (!cat->willLogToParent) + if (!cat->additivity) break; cat = cat->parent; - } + } va_end(ev->ap); + va_end(ev->ap_copy); + +#ifdef WIN32 + free(ev->buffer); +#endif } -static void _cat_init(xbt_log_category_t category) { - if (category == &_XBT_LOGV(XBT_LOG_ROOT_CAT)) { - category->threshold = xbt_log_priority_info; - category->appender = xbt_log_default_appender; - } else { - xbt_log_parent_set(category, category->parent); +static void _xbt_log_cat_apply_set(xbt_log_category_t category, + xbt_log_setting_t setting) { + + s_xbt_log_event_t _log_ev; + + if (setting->thresh != xbt_log_priority_uninitialized) { + xbt_log_threshold_set(category, setting->thresh); + + if (category->threshold <= xbt_log_priority_debug) { + _log_ev.cat = category; + _log_ev.priority = xbt_log_priority_debug; + _log_ev.fileName = __FILE__ ; + _log_ev.functionName = _XBT_FUNCTION ; + _log_ev.lineNum = __LINE__ ; + + _xbt_log_event_log(&_log_ev, + "Apply settings for category '%s': set threshold to %s (=%d)", + category->name, + xbt_log_priority_names[category->threshold], + category->threshold); + } } - _apply_control(category); -} + if (setting->fmt) { + xbt_log_layout_set(category,xbt_log_layout_format_new(setting->fmt)); + + if (category->threshold <= xbt_log_priority_debug) { + _log_ev.cat = category; + _log_ev.priority = xbt_log_priority_debug; + _log_ev.fileName = __FILE__ ; + _log_ev.functionName = _XBT_FUNCTION ; + _log_ev.lineNum = __LINE__ ; + + _xbt_log_event_log(&_log_ev, + "Apply settings for category '%s': set format to %s", + category->name, + setting->fmt); + } + } + + if (setting->additivity != -1) { + xbt_log_additivity_set(category,setting->additivity); + + if (category->threshold <= xbt_log_priority_debug) { + _log_ev.cat = category; + _log_ev.priority = xbt_log_priority_debug; + _log_ev.fileName = __FILE__ ; + _log_ev.functionName = _XBT_FUNCTION ; + _log_ev.lineNum = __LINE__ ; + + _xbt_log_event_log(&_log_ev, + "Apply settings for category '%s': set additivity to %s", + category->name, + (setting->additivity?"on":"off")); + } + } + if (setting->appender) { + xbt_log_appender_set(category,setting->appender); + if (!category->layout) + xbt_log_layout_set(category,xbt_log_layout_simple_new(NULL)); + category->additivity = 0; + if (category->threshold <= xbt_log_priority_debug) { + _log_ev.cat = category; + _log_ev.priority = xbt_log_priority_debug; + _log_ev.fileName = __FILE__ ; + _log_ev.functionName = _XBT_FUNCTION ; + _log_ev.lineNum = __LINE__ ; + + _xbt_log_event_log(&_log_ev, + "Set %p as appender of category '%s'", + setting->appender, + category->name); + } + } + +} /* * This gets called the first time a category is referenced and performs the - * initialization. + * initialization. * Also resets threshold to inherited! */ -int _xbt_log_cat_init(e_xbt_log_priority_t priority, - xbt_log_category_t category) { - - _cat_init(category); - +int _xbt_log_cat_init(xbt_log_category_t category, + e_xbt_log_priority_t priority) { + unsigned int cursor; + xbt_log_setting_t setting=NULL; + int found = 0; + s_xbt_log_event_t _log_ev; + + if (_XBT_LOGV(log).threshold <= xbt_log_priority_debug + && _XBT_LOGV(log).threshold != xbt_log_priority_uninitialized) { + _log_ev.cat = &_XBT_LOGV(log); + _log_ev.priority = xbt_log_priority_debug; + _log_ev.fileName = __FILE__ ; + _log_ev.functionName = _XBT_FUNCTION ; + _log_ev.lineNum = __LINE__ ; + _xbt_log_event_log(&_log_ev, "Initializing category '%s' (firstChild=%s, nextSibling=%s)", + category->name, + (category->firstChild ?category->firstChild->name :"none"), + (category->nextSibling?category->nextSibling->name:"none")); + } + + if(category == &_XBT_LOGV(XBT_LOG_ROOT_CAT)){ + category->threshold = xbt_log_priority_info;/* xbt_log_priority_debug*/; + category->appender = xbt_log_default_appender; + category->layout = xbt_log_default_layout; + } else { + + if (!category->parent) + category->parent = &_XBT_LOGV(XBT_LOG_ROOT_CAT); + + if (_XBT_LOGV(log).threshold <= xbt_log_priority_debug + && _XBT_LOGV(log).threshold != xbt_log_priority_uninitialized) { + _log_ev.lineNum = __LINE__ ; + _xbt_log_event_log(&_log_ev, "Set %s (%s) as father of %s ", category->parent->name, + (category->parent->threshold == xbt_log_priority_uninitialized ? "uninited":xbt_log_priority_names[category->parent->threshold]), + category->name); + } + xbt_log_parent_set(category, category->parent); + + if (_XBT_LOGV(log).threshold < xbt_log_priority_info + && _XBT_LOGV(log).threshold != xbt_log_priority_uninitialized) { + char *buf,*res=NULL; + xbt_log_category_t cpp = category->parent->firstChild; + while (cpp) { + if (res) { + buf = bprintf("%s %s",res,cpp->name); + free(res); + res = buf; + } else { + res = xbt_strdup(cpp->name); + } + cpp = cpp->nextSibling; + } + + _log_ev.lineNum = __LINE__ ; + _xbt_log_event_log(&_log_ev, + "Childs of %s: %s; nextSibling: %s", category->parent->name,res, + (category->parent->nextSibling?category->parent->nextSibling->name:"none")); + + free(res); + } + + } + + /* Apply the control */ + if (!xbt_log_settings) + return priority >= category->threshold; + + xbt_assert0(category,"NULL category"); + xbt_assert(category->name); + + xbt_dynar_foreach(xbt_log_settings,cursor,setting) { + xbt_assert0(setting,"Damnit, NULL cat in the list"); + xbt_assert1(setting->catname,"NULL setting(=%p)->catname",(void*)setting); + + if (!strcmp(setting->catname,category->name)) { + + found = 1; + + _xbt_log_cat_apply_set(category,setting); + + xbt_dynar_cursor_rm(xbt_log_settings,&cursor); + } + } + + if (!found && category->threshold <= xbt_log_priority_verbose) { + + _log_ev.cat = &_XBT_LOGV(log); + _log_ev.priority = xbt_log_priority_verbose; + _log_ev.fileName = __FILE__ ; + _log_ev.functionName = _XBT_FUNCTION ; + _log_ev.lineNum = __LINE__ ; + + _xbt_log_event_log(&_log_ev, + "Category '%s': inherited threshold = %s (=%d)", + category->name, + xbt_log_priority_names[category->threshold], category->threshold); + } + return priority >= category->threshold; } -void xbt_log_parent_set(xbt_log_category_t cat, - xbt_log_category_t parent) { +void xbt_log_parent_set(xbt_log_category_t cat,xbt_log_category_t parent) { xbt_assert0(cat,"NULL category to be given a parent"); xbt_assert1(parent,"The parent category of %s is NULL",cat->name); - /* unlink from current parent */ - if (cat->threshold != xbt_log_priority_uninitialized) { + /* + * if the threshold is initialized + * unlink from current parent + */ + if(cat->threshold != xbt_log_priority_uninitialized){ + xbt_log_category_t* cpp = &parent->firstChild; + while(*cpp != cat && *cpp != NULL) { cpp = &(*cpp)->nextSibling; } + xbt_assert(*cpp == cat); *cpp = cat->nextSibling; } - /* Set new parent */ cat->parent = parent; cat->nextSibling = parent->firstChild; + parent->firstChild = cat; - /* Make sure parent is initialized */ - if (parent->threshold == xbt_log_priority_uninitialized) { - _cat_init(parent); + if (parent->threshold == xbt_log_priority_uninitialized){ + + _xbt_log_cat_init(parent, + xbt_log_priority_uninitialized/* ignored*/); } - - /* Reset priority */ + cat->threshold = parent->threshold; + cat->isThreshInherited = 1; -} /* log_setParent */ + +} static void _set_inherited_thresholds(xbt_log_category_t cat) { + xbt_log_category_t child = cat->firstChild; + for( ; child != NULL; child = child->nextSibling) { if (child->isThreshInherited) { if (cat != &_XBT_LOGV(log)) - VERB3("Set category threshold of %s to %s (=%d)", - child->name,xbt_log_priority_names[cat->threshold],cat->threshold); + VERB3("Set category threshold of %s to %s (=%d)", + child->name,xbt_log_priority_names[cat->threshold],cat->threshold); child->threshold = cat->threshold; _set_inherited_thresholds(child); } } + + } void xbt_log_threshold_set(xbt_log_category_t cat, - e_xbt_log_priority_t threshold) { + e_xbt_log_priority_t threshold) { cat->threshold = threshold; cat->isThreshInherited = 0; + _set_inherited_thresholds(cat); + } -static void _xbt_log_parse_setting(const char* control_string, - xbt_log_setting_t set) { +static xbt_log_setting_t _xbt_log_parse_setting(const char* control_string) { + + xbt_log_setting_t set = xbt_new(s_xbt_log_setting_t,1); const char *name, *dot, *eq; - + set->catname=NULL; - if (!*control_string) - return; + set->thresh = xbt_log_priority_uninitialized; + set->fmt = NULL; + set->additivity = -1; + set->appender = NULL; + + if (!*control_string) + return set; DEBUG1("Parse log setting '%s'",control_string); control_string += strspn(control_string, " "); name = control_string; control_string += strcspn(control_string, ".= "); dot = control_string; - control_string += strcspn(control_string, "= "); + control_string += strcspn(control_string, ":= "); eq = control_string; control_string += strcspn(control_string, " "); - xbt_assert1(*dot == '.' && *eq == '=', - "Invalid control string '%s'",control_string); + xbt_assert1(*dot == '.' && (*eq == '=' || *eq == ':'), + "Invalid control string '%s'",control_string); - if (!strncmp(dot + 1, "thresh", min(eq - dot - 1,strlen("thresh")))) { + if (!strncmp(dot + 1, "thresh", (size_t)(eq - dot - 1))) { int i; char *neweq=xbt_strdup(eq+1); char *p=neweq-1; - + while (*(++p) != '\0') { if (*p >= 'a' && *p <= 'z') { - *p-='a'-'A'; + *p-='a'-'A'; } } - + DEBUG1("New priority name = %s",neweq); - for (i=0; ithresh=i; + if (ithresh= (e_xbt_log_priority_t) i; } else { - xbt_assert1(FALSE,"Unknown priority name: %s",eq+1); + THROW1(arg_error,0, + "Unknown priority name: %s (must be one of: trace,debug,verbose,info,warning,error,critical)",eq+1); } - xbt_free(neweq); + free(neweq); + } else if ( !strncmp(dot + 1, "add", (size_t)(eq - dot - 1)) || + !strncmp(dot + 1, "additivity", (size_t)(eq - dot - 1)) ) { + + char *neweq=xbt_strdup(eq+1); + char *p=neweq-1; + + while (*(++p) != '\0') { + if (*p >= 'a' && *p <= 'z') { + *p-='a'-'A'; + } + } + if ( !strcmp(neweq,"ON") || + !strcmp(neweq,"YES") || + !strcmp(neweq,"1") ) { + set->additivity = 1; + } else { + set->additivity = 0; + } + free(neweq); + } else if ( !strncmp(dot + 1, "app", (size_t)(eq - dot - 1)) || + !strncmp(dot + 1, "appender", (size_t)(eq - dot - 1)) ) { + + char *neweq=xbt_strdup(eq+1); + + if ( !strncmp(neweq,"file:",5) ) { + set->appender = xbt_log_appender_file_new(neweq+5); + } else { + THROW1(arg_error,0,"Unknown appender log type: '%s'",neweq); + } + free(neweq); + } else if (!strncmp(dot + 1, "fmt", (size_t)(eq - dot - 1))) { + set->fmt = xbt_strdup(eq+1); } else { char buff[512]; - snprintf(buff,min(512,eq - dot - 1),"%s",dot+1); - xbt_assert1(FALSE,"Unknown setting of the log category: %s",buff); + snprintf(buff,min(512,eq - dot),"%s",dot+1); + THROW1(arg_error,0,"Unknown setting of the log category: '%s'",buff); } set->catname=(char*)xbt_malloc(dot - name+1); - - strncpy(set->catname,name,dot-name); + + memcpy(set->catname,name,dot-name); set->catname[dot-name]='\0'; /* Just in case */ DEBUG1("This is for cat '%s'", set->catname); -} -static xbt_error_t _xbt_log_cat_searchsub(xbt_log_category_t cat,char *name, - /*OUT*/xbt_log_category_t*whereto) { - xbt_error_t errcode; - xbt_log_category_t child; - - if (!strcmp(cat->name,name)) { - *whereto=cat; - return no_error; - } - for(child=cat->firstChild ; child != NULL; child = child->nextSibling) { - errcode=_xbt_log_cat_searchsub(child,name,whereto); - if (errcode==no_error) - return no_error; - } - return mismatch_error; + return set; } -static void _cleanup_double_spaces(char *s) { - char *p = s; - int e = 0; - - while (1) { - if (!*p) - goto end; - - if (!isspace(*p)) - break; - - p++; +static xbt_log_category_t _xbt_log_cat_searchsub(xbt_log_category_t cat,char *name) { + xbt_log_category_t child,res; + + DEBUG4("Search '%s' into '%s' (firstChild='%s'; nextSibling='%s')",name,cat->name, + (cat->firstChild ? cat->firstChild->name :"none"), + (cat->nextSibling ? cat->nextSibling->name:"none")); + if (!strcmp(cat->name,name)) + return cat; + + for (child=cat->firstChild ; child != NULL; child = child->nextSibling) { + DEBUG1("Dig into %s",child->name); + res = _xbt_log_cat_searchsub(child,name); + if (res) + return res; } - - e = 1; - - do { - if (e) - *s++ = *p; - - if (!*++p) - goto end; - - if (e ^ !isspace(*p)) - if ((e = !e)) - *s++ = ' '; - } while (1); - - end: - *s = '\0'; + + return NULL; } /** - * xbt_log_control_set: - * @cs: What to parse + * \ingroup XBT_log + * \param control_string What to parse * * Typically passed a command-line argument. The string has the syntax: * - * ( [category] "." [keyword] "=" value (" ")... )... + * ( [category] "." [keyword] ":" value (" ")... )... * - * where [category] is one the category names and keyword is one of the - * following: + * where [category] is one the category names (see \ref XBT_log_cats for + * a complete list of the ones defined in the SimGrid library) + * and keyword is one of the following: * - * thresh value is an integer priority level. Sets the category's - * threshold priority. + * - thres: category's threshold priority. Possible values: + * TRACE,DEBUG,VERBOSE,INFO,WARNING,ERROR,CRITICAL + * - add or additivity: whether the logging actions must be passed to + * the parent category. + * Possible values: 0, 1, no, yes, on, off. + * Default value: yes. + * - fmt: the format to use. See \ref log_use_conf_fmt for more information. + * - app or appender: the appender to use. See \ref log_use_conf_app for more + * information. * - * @warning - * This routine may only be called once and that must be before any other - * logging command! Typically, this is done from main(). */ void xbt_log_control_set(const char* control_string) { - xbt_error_t errcode; xbt_log_setting_t set; - char *cs; - char *p; - int done = 0; - - DEBUG1("Parse log settings '%s'",control_string); - if (control_string == NULL) + + /* To split the string in commands, and the cursors */ + xbt_dynar_t set_strings; + char *str; + unsigned int cpt; + + if (!control_string) return; + DEBUG1("Parse log settings '%s'",control_string); + + /* some initialization if this is the first time that this get called */ if (xbt_log_settings == NULL) xbt_log_settings = xbt_dynar_new(sizeof(xbt_log_setting_t), - _free_setting); + _free_setting); + + /* split the string, and remove empty entries */ + set_strings=xbt_str_split_quoted(control_string); + + if (xbt_dynar_length(set_strings) == 0) { /* vicious user! */ + xbt_dynar_free(&set_strings); + return; + } - set = xbt_new(s_xbt_log_setting_t,1); - cs=xbt_strdup(control_string); + /* Parse each entry and either use it right now (if the category was already + created), or store it for further use */ + xbt_dynar_foreach(set_strings,cpt,str) { + xbt_log_category_t cat=NULL; - _cleanup_double_spaces(cs); + set = _xbt_log_parse_setting(str); + cat = _xbt_log_cat_searchsub(&_XBT_LOGV(XBT_LOG_ROOT_CAT),set->catname); - while (!done) { - xbt_log_category_t cat; - - p=strrchr(cs,' '); - if (p) { - *p='\0'; - *p++; + if (cat) { + DEBUG0("Apply directly"); + _xbt_log_cat_apply_set(cat,set); + _free_setting((void*)&set); } else { - p=cs; - done = 1; - } - _xbt_log_parse_setting(p,set); - - errcode = _xbt_log_cat_searchsub(&_XBT_LOGV(root),set->catname,&cat); - if (errcode == mismatch_error) { + DEBUG0("Store for further application"); DEBUG1("push %p to the settings",(void*)set); xbt_dynar_push(xbt_log_settings,&set); - /* malloc in advance the next slot */ - set = xbt_new(s_xbt_log_setting_t,1); - } else { - DEBUG0("Apply directly"); - xbt_free(set->catname); - xbt_log_threshold_set(cat,set->thresh); } } - xbt_free(set); - xbt_free(cs); -} + xbt_dynar_free(&set_strings); +} void xbt_log_appender_set(xbt_log_category_t cat, xbt_log_appender_t app) { + if (cat->appender) { + if (cat->appender->free_) + cat->appender->free_(cat->appender); + free(cat->appender); + } cat->appender = app; } +void xbt_log_layout_set(xbt_log_category_t cat, xbt_log_layout_t lay) { + if (!cat->appender) { + VERB1("No appender to category %s. Setting the file appender as default", + cat->name); + xbt_log_appender_set(cat,xbt_log_appender_file_new(NULL)); + } + if (cat->layout && cat != &_XBT_LOGV(root)) { + /* better leak the default layout than check every categories to + change it */ + if (cat->layout->free_) { + cat->layout->free_(cat->layout); + free(cat->layout); + } + } + cat->layout = lay; + xbt_log_additivity_set(cat,0); +} -void xbt_log_exit(void) { - VERB0("Exiting log"); - xbt_dynar_free(&xbt_log_settings); - VERB0("Exited log"); +void xbt_log_additivity_set(xbt_log_category_t cat, int additivity) { + cat->additivity = additivity; } +