lib/util/debug.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba debug defines
   4    Copyright (C) Andrew Tridgell 2003
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #ifndef _SAMBA_DEBUG_H_
  21 #define _SAMBA_DEBUG_H_
  22
  23 /**
  24  * @file
  25  * @brief Debugging macros
  26  */
  27
  28 /* the debug operations structure - contains function pointers to
  29    various debug implementations of each operation */
  30 struct debug_ops {
  31         /* function to log (using DEBUG) suspicious usage of data structure */
  32         void (*log_suspicious_usage)(const char* from, const char* info);
  33
  34         /* function to log (using printf) suspicious usage of data structure.
  35          * To be used in circumstances when using DEBUG would cause loop. */
  36         void (*print_suspicious_usage)(const char* from, const char* info);
  37
  38         /* function to return process/thread id */
  39         uint32_t (*get_task_id)(void);
  40
  41         /* function to log process/thread id */
  42         void (*log_task_id)(int fd);
  43 };
  44
  45 #define DEBUGLEVEL *debug_level
  46 extern int DEBUGLEVEL;
  47
  48 #define DEBUGLVL(level) ((level) <= DEBUGLEVEL)
  49 #define _DEBUG(level, body, header) do { \
  50         if (DEBUGLVL(level)) { \
  51                 if (header) { \
  52                         dbghdr(level, __location__, __FUNCTION__); \
  53                 } \
  54                 dbgtext body; \
  55         } \
  56 } while (0)
  57 /**
  58  * Write to the debug log.
  59  */
  60 #define DEBUG(level, body) _DEBUG(level, body, true)
  61 /**
  62  * Add data to an existing debug log entry.
  63  */
  64 #define DEBUGADD(level, body) _DEBUG(level, body, false)
  65
  66 /**
  67  * Obtain indentation string for the debug log.
  68  *
  69  * Level specified by n.
  70  */
  71 #define DEBUGTAB(n) do_debug_tab(n)
  72
  73 /** Possible destinations for the debug log (in order of precedence -
  74  * once set to DEBUG_FILE, it is not possible to reset to DEBUG_STDOUT
  75  * for example.  This makes it easy to override for debug to stderr on
  76  * the command line, as the smb.conf cannot reset it back to
  77  * file-based logging */
  78 enum debug_logtype {DEBUG_STDOUT = 0, DEBUG_FILE = 1, DEBUG_STDERR = 2};
  79
  80 /**
  81   the backend for debug messages. Note that the DEBUG() macro has already
  82   ensured that the log level has been met before this is called
  83 */
  84 _PUBLIC_ void dbghdr(int level, const char *location, const char *func);
  85
  86 _PUBLIC_ void dbghdrclass(int level, int cls, const char *location, const char *func);
  87
  88 /**
  89   reopen the log file (usually called because the log file name might have changed)
  90 */
  91 _PUBLIC_ void reopen_logs(void);
  92
  93 /**
  94  * this global variable determines what messages are printed
  95  */
  96 _PUBLIC_ void debug_schedule_reopen_logs(void);
  97
  98 /**
  99   control the name of the logfile and whether logging will be to stdout, stderr
 100   or a file
 101 */
 102 _PUBLIC_ void setup_logging(const char *prog_name, enum debug_logtype new_logtype);
 103
 104 /**
 105    Just run logging to stdout for this program
 106 */
 107 _PUBLIC_ void setup_logging_stdout(void);
 108
 109 /**
 110   return a string constant containing n tabs
 111   no more than 10 tabs are returned
 112 */
 113 _PUBLIC_ const char *do_debug_tab(int n);
 114
 115 /**
 116   log suspicious usage - print comments and backtrace
 117 */
 118 _PUBLIC_ void log_suspicious_usage(const char *from, const char *info);
 119
 120 /**
 121   print suspicious usage - print comments and backtrace
 122 */
 123 _PUBLIC_ void print_suspicious_usage(const char* from, const char* info);
 124 _PUBLIC_ uint32_t get_task_id(void);
 125 _PUBLIC_ void log_task_id(void);
 126
 127 /**
 128   register a set of debug handlers.
 129 */
 130 _PUBLIC_ void register_debug_handlers(const char *name, struct debug_ops *ops);
 131
 132 /**
 133   the backend for debug messages. Note that the DEBUG() macro has already
 134   ensured that the log level has been met before this is called
 135
 136   @note You should never have to call this function directly. Call the DEBUG()
 137   macro instead.
 138 */
 139 _PUBLIC_ void dbgtext(const char *format, ...) PRINTF_ATTRIBUTE(1,2);
 140
 141 struct _XFILE;
 142 extern struct _XFILE *dbf;
 143
 144 /* setup talloc logging */
 145 void debug_setup_talloc_log(void);
 146
 147 #endif