source3/include/debug.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    SMB debug stuff
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) John H Terpstra 1996-1998
   6    Copyright (C) Luke Kenneth Casson Leighton 1996-1998
   7    Copyright (C) Paul Ashton 1998
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #ifndef _DEBUG_H
  24 #define _DEBUG_H
  25
  26 /* -------------------------------------------------------------------------- **
  27  * Debugging code.  See also debug.c
  28  */
  29
  30 /* the maximum debug level to compile into the code. This assumes a good
  31    optimising compiler that can remove unused code
  32    for embedded or low-memory systems set this to a value like 2 to get
  33    only important messages. This gives *much* smaller binaries
  34 */
  35 #ifndef MAX_DEBUG_LEVEL
  36 #define MAX_DEBUG_LEVEL 1000
  37 #endif
  38
  39 /* mkproto.awk has trouble with ifdef'd function definitions (it ignores
  40  * the #ifdef directive and will read both definitions, thus creating two
  41  * diffferent prototype declarations), so we must do these by hand.
  42  */
  43 /* I know the __attribute__ stuff is ugly, but it does ensure we get the
  44    arguments to DEBUG() right. We have got them wrong too often in the
  45    past.
  46    The PRINTFLIKE comment does the equivalent for SGI MIPSPro.
  47  */
  48 /* PRINTFLIKE1 */
  49 int  Debug1( const char *, ... ) PRINTF_ATTRIBUTE(1,2);
  50 /* PRINTFLIKE1 */
  51 bool dbgtext( const char *, ... ) PRINTF_ATTRIBUTE(1,2);
  52 bool dbghdrclass( int level, int cls, const char *location, const char *func);
  53 bool dbghdr( int level, const char *location, const char *func);
  54
  55 #if defined(sgi) && (_COMPILER_VERSION >= 730)
  56 #pragma mips_frequency_hint NEVER Debug1
  57 #pragma mips_frequency_hint NEVER dbgtext
  58 #pragma mips_frequency_hint NEVER dbghdrclass
  59 #pragma mips_frequency_hint NEVER dbghdr
  60 #endif
  61
  62 /* If we have these macros, we can add additional info to the header. */
  63
  64 #ifdef HAVE_FUNCTION_MACRO
  65 #define FUNCTION_MACRO  (__FUNCTION__)
  66 #else
  67 #define FUNCTION_MACRO  ("")
  68 #endif
  69
  70 /*
  71  * Redefine DEBUGLEVEL because so we don't have to change every source file
  72  * that *unnecessarily* references it. Source files neeed not extern reference
  73  * DEBUGLEVEL, as it's extern in includes.h (which all source files include).
  74  * Eventually, all these references should be removed, and all references to
  75  * DEBUGLEVEL should be references to DEBUGLEVEL_CLASS[DBGC_ALL]. This could
  76  * still be through a macro still called DEBUGLEVEL. This cannot be done now
  77  * because some references would expand incorrectly.
  78  */
  79 #define DEBUGLEVEL *debug_level
  80 extern int DEBUGLEVEL;
  81
  82 /*
  83  * Define all new debug classes here. A class is represented by an entry in
  84  * the DEBUGLEVEL_CLASS array. Index zero of this arrray is equivalent to the
  85  * old DEBUGLEVEL. Any source file that does NOT add the following lines:
  86  *
  87  *   #undef  DBGC_CLASS
  88  *   #define DBGC_CLASS DBGC_<your class name here>
  89  *
  90  * at the start of the file (after #include "includes.h") will default to
  91  * using index zero, so it will behaive just like it always has.
  92  */
  93 #define DBGC_ALL                0 /* index equivalent to DEBUGLEVEL */
  94
  95 #define DBGC_TDB                1
  96 #define DBGC_PRINTDRIVERS       2
  97 #define DBGC_LANMAN             3
  98 #define DBGC_SMB                4
  99 #define DBGC_RPC_PARSE          5
 100 #define DBGC_RPC_SRV            6
 101 #define DBGC_RPC_CLI            7
 102 #define DBGC_PASSDB             8
 103 #define DBGC_SAM                9
 104 #define DBGC_AUTH               10
 105 #define DBGC_WINBIND            11
 106 #define DBGC_VFS                12
 107 #define DBGC_IDMAP              13
 108 #define DBGC_QUOTA              14
 109 #define DBGC_ACLS               15
 110 #define DBGC_LOCKING            16
 111 #define DBGC_MSDFS              17
 112 #define DBGC_DMAPI              18
 113 #define DBGC_REGISTRY           19
 114
 115 /* So you can define DBGC_CLASS before including debug.h */
 116 #ifndef DBGC_CLASS
 117 #define DBGC_CLASS            0     /* override as shown above */
 118 #endif
 119
 120 extern int  *DEBUGLEVEL_CLASS;
 121 extern bool *DEBUGLEVEL_CLASS_ISSET;
 122
 123 /* Debugging macros
 124  *
 125  * DEBUGLVL()
 126  *   If the 'file specific' debug class level >= level OR the system-wide
 127  *   DEBUGLEVEL (synomym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then
 128  *   generate a header using the default macros for file, line, and
 129  *   function name. Returns True if the debug level was <= DEBUGLEVEL.
 130  *
 131  *   Example: if( DEBUGLVL( 2 ) ) dbgtext( "Some text.\n" );
 132  *
 133  * DEBUGLVLC()
 134  *   If the 'macro specified' debug class level >= level OR the system-wide
 135  *   DEBUGLEVEL (synomym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then
 136  *   generate a header using the default macros for file, line, and
 137  *   function name. Returns True if the debug level was <= DEBUGLEVEL.
 138  *
 139  *   Example: if( DEBUGLVLC( DBGC_TDB, 2 ) ) dbgtext( "Some text.\n" );
 140  *
 141  * DEBUG()
 142  *   If the 'file specific' debug class level >= level OR the system-wide
 143  *   DEBUGLEVEL (synomym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then
 144  *   generate a header using the default macros for file, line, and
 145  *   function name. Each call to DEBUG() generates a new header *unless* the
 146  *   previous debug output was unterminated (i.e. no '\n').
 147  *   See debug.c:dbghdr() for more info.
 148  *
 149  *   Example: DEBUG( 2, ("Some text and a value %d.\n", value) );
 150  *
 151  * DEBUGC()
 152  *   If the 'macro specified' debug class level >= level OR the system-wide
 153  *   DEBUGLEVEL (synomym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then
 154  *   generate a header using the default macros for file, line, and
 155  *   function name. Each call to DEBUG() generates a new header *unless* the
 156  *   previous debug output was unterminated (i.e. no '\n').
 157  *   See debug.c:dbghdr() for more info.
 158  *
 159  *   Example: DEBUGC( DBGC_TDB, 2, ("Some text and a value %d.\n", value) );
 160  *
 161  *  DEBUGADD(), DEBUGADDC()
 162  *    Same as DEBUG() and DEBUGC() except the text is appended to the previous
 163  *    DEBUG(), DEBUGC(), DEBUGADD(), DEBUGADDC() with out another interviening
 164  *    header.
 165  *
 166  *    Example: DEBUGADD( 2, ("Some text and a value %d.\n", value) );
 167  *             DEBUGADDC( DBGC_TDB, 2, ("Some text and a value %d.\n", value) );
 168  *
 169  * Note: If the debug class has not be redeined (see above) then the optimizer
 170  * will remove the extra conditional test.
 171  */
 172
 173 /*
 174  * From talloc.c:
 175  */
 176
 177 /* these macros gain us a few percent of speed on gcc */
 178 #if (__GNUC__ >= 3)
 179 /* the strange !! is to ensure that __builtin_expect() takes either 0 or 1
 180    as its first argument */
 181 #ifndef likely
 182 #define likely(x)   __builtin_expect(!!(x), 1)
 183 #endif
 184 #ifndef unlikely
 185 #define unlikely(x) __builtin_expect(!!(x), 0)
 186 #endif
 187 #else
 188 #ifndef likely
 189 #define likely(x) (x)
 190 #endif
 191 #ifndef unlikely
 192 #define unlikely(x) (x)
 193 #endif
 194 #endif
 195
 196 #define CHECK_DEBUGLVL( level ) \
 197   ( ((level) <= MAX_DEBUG_LEVEL) && \
 198      unlikely((DEBUGLEVEL_CLASS[ DBGC_CLASS ] >= (level))||  \
 199      (!DEBUGLEVEL_CLASS_ISSET[ DBGC_CLASS ] && \
 200       DEBUGLEVEL_CLASS[ DBGC_ALL   ] >= (level))  ) )
 201
 202 #define DEBUGLVL( level ) \
 203   ( CHECK_DEBUGLVL(level) \
 204    && dbghdrclass( level, DBGC_CLASS, __location__, FUNCTION_MACRO ) )
 205
 206
 207 #define DEBUGLVLC( dbgc_class, level ) \
 208   ( ((level) <= MAX_DEBUG_LEVEL) && \
 209      unlikely((DEBUGLEVEL_CLASS[ dbgc_class ] >= (level))||  \
 210      (!DEBUGLEVEL_CLASS_ISSET[ dbgc_class ] && \
 211       DEBUGLEVEL_CLASS[ DBGC_ALL   ] >= (level))  ) \
 212    && dbghdrclass( level, DBGC_CLASS, __location__, FUNCTION_MACRO) )
 213
 214
 215 #define DEBUG( level, body ) \
 216   (void)( ((level) <= MAX_DEBUG_LEVEL) && \
 217            unlikely((DEBUGLEVEL_CLASS[ DBGC_CLASS ] >= (level))||  \
 218            (!DEBUGLEVEL_CLASS_ISSET[ DBGC_CLASS ] && \
 219             DEBUGLEVEL_CLASS[ DBGC_ALL   ] >= (level))  ) \
 220        && (dbghdrclass( level, DBGC_CLASS, __location__, FUNCTION_MACRO )) \
 221        && (dbgtext body) )
 222
 223 #define DEBUGC( dbgc_class, level, body ) \
 224   (void)( ((level) <= MAX_DEBUG_LEVEL) && \
 225            unlikely((DEBUGLEVEL_CLASS[ dbgc_class ] >= (level))||  \
 226            (!DEBUGLEVEL_CLASS_ISSET[ dbgc_class ] && \
 227             DEBUGLEVEL_CLASS[ DBGC_ALL   ] >= (level))  ) \
 228        && (dbghdrclass( level, DBGC_CLASS, __location__, FUNCTION_MACRO)) \
 229        && (dbgtext body) )
 230
 231 #define DEBUGADD( level, body ) \
 232   (void)( ((level) <= MAX_DEBUG_LEVEL) && \
 233            unlikely((DEBUGLEVEL_CLASS[ DBGC_CLASS ] >= (level))||  \
 234            (!DEBUGLEVEL_CLASS_ISSET[ DBGC_CLASS ] && \
 235             DEBUGLEVEL_CLASS[ DBGC_ALL   ] >= (level))  ) \
 236        && (dbgtext body) )
 237
 238 #define DEBUGADDC( dbgc_class, level, body ) \
 239   (void)( ((level) <= MAX_DEBUG_LEVEL) && \
 240           unlikely((DEBUGLEVEL_CLASS[ dbgc_class ] >= (level))||  \
 241            (!DEBUGLEVEL_CLASS_ISSET[ dbgc_class ] && \
 242             DEBUGLEVEL_CLASS[ DBGC_ALL   ] >= (level))  ) \
 243        && (dbgtext body) )
 244
 245 /* Print a separator to the debug log. */
 246 #define DEBUGSEP(level)\
 247         DEBUG((level),("===============================================================\n"))
 248
 249 /* The following definitions come from lib/debug.c  */
 250
 251 /** Possible destinations for the debug log (in order of precedence -
 252  * once set to DEBUG_FILE, it is not possible to reset to DEBUG_STDOUT
 253  * for example.  This makes it easy to override for debug to stderr on
 254  * the command line, as the smb.conf cannot reset it back to
 255  * file-based logging */
 256 enum debug_logtype {DEBUG_DEFAULT_STDERR = 0, DEBUG_STDOUT = 1, DEBUG_FILE = 2, DEBUG_STDERR = 3};
 257
 258 void setup_logging(const char *prog_name, enum debug_logtype new_logtype);
 259
 260 void debug_close_dbf(void);
 261 void gfree_debugsyms(void);
 262 const char *debug_classname_from_index(int ndx);
 263 int debug_add_class(const char *classname);
 264 int debug_lookup_classname(const char *classname);
 265 bool debug_parse_levels(const char *params_str);
 266 void debug_message(struct messaging_context *msg_ctx, void *private_data, uint32_t msg_type, struct server_id src, DATA_BLOB *data);
 267 void debug_init(void);
 268 void debug_register_msgs(struct messaging_context *msg_ctx);
 269 void debug_set_logfile(const char *name);
 270 bool reopen_logs( void );
 271 void force_check_log_size( void );
 272 bool need_to_check_log_size( void );
 273 void check_log_size( void );
 274 void dbgflush( void );
 275 bool dbghdrclass(int level, int cls, const char *location, const char *func);
 276 bool dbghdr(int level, const char *location, const char *func);
 277 bool debug_get_output_is_stderr(void);
 278
 279 #endif
 280