summaryrefslogtreecommitdiff
path: root/lib/util/debug.h
blob: c01fa928b5ea2c15f7ce8394fc5d2bd0a1cdb79a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
/* 
   Unix SMB/CIFS implementation.
   SMB debug stuff
   Copyright (C) Andrew Tridgell 1992-1998
   Copyright (C) John H Terpstra 1996-1998
   Copyright (C) Luke Kenneth Casson Leighton 1996-1998
   Copyright (C) Paul Ashton 1998

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef _DEBUG_H
#define _DEBUG_H

/* -------------------------------------------------------------------------- **
 * Debugging code.  See also debug.c
 */

/* the maximum debug level to compile into the code. This assumes a good
   optimising compiler that can remove unused code
   for embedded or low-memory systems set this to a value like 2 to get
   only important messages. This gives *much* smaller binaries
*/
#ifndef MAX_DEBUG_LEVEL
#define MAX_DEBUG_LEVEL 1000
#endif

int  Debug1( const char *, ... ) PRINTF_ATTRIBUTE(1,2);
bool dbgtext( const char *, ... ) PRINTF_ATTRIBUTE(1,2);
bool dbghdrclass( int level, int cls, const char *location, const char *func);
bool dbghdr( int level, const char *location, const char *func);

/*
 * Redefine DEBUGLEVEL because so we don't have to change every source file
 * that *unnecessarily* references it.
 */
#define DEBUGLEVEL DEBUGLEVEL_CLASS[DBGC_ALL]

/*
 * Define all new debug classes here. A class is represented by an entry in
 * the DEBUGLEVEL_CLASS array. Index zero of this arrray is equivalent to the
 * old DEBUGLEVEL. Any source file that does NOT add the following lines:
 *
 *   #undef  DBGC_CLASS
 *   #define DBGC_CLASS DBGC_<your class name here>
 *
 * at the start of the file (after #include "includes.h") will default to
 * using index zero, so it will behaive just like it always has.
 */
#define DBGC_ALL		0 /* index equivalent to DEBUGLEVEL */

#define DBGC_TDB		1
#define DBGC_PRINTDRIVERS	2
#define DBGC_LANMAN		3
#define DBGC_SMB		4
#define DBGC_RPC_PARSE		5
#define DBGC_RPC_SRV		6
#define DBGC_RPC_CLI		7
#define DBGC_PASSDB		8
#define DBGC_SAM		9
#define DBGC_AUTH		10
#define DBGC_WINBIND		11
#define DBGC_VFS		12
#define DBGC_IDMAP		13
#define DBGC_QUOTA		14
#define DBGC_ACLS		15
#define DBGC_LOCKING		16
#define DBGC_MSDFS		17
#define DBGC_DMAPI		18
#define DBGC_REGISTRY		19

/* Always ensure this is updated when new fixed classes area added, to ensure the array in debug.c is the right size */
#define DBGC_MAX_FIXED		19

/* So you can define DBGC_CLASS before including debug.h */
#ifndef DBGC_CLASS
#define DBGC_CLASS            0     /* override as shown above */
#endif

extern int  *DEBUGLEVEL_CLASS;

/* Debugging macros
 *
 * DEBUGLVL()
 *   If the 'file specific' debug class level >= level OR the system-wide
 *   DEBUGLEVEL (synomym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then
 *   generate a header using the default macros for file, line, and
 *   function name. Returns True if the debug level was <= DEBUGLEVEL.
 *
 *   Example: if( DEBUGLVL( 2 ) ) dbgtext( "Some text.\n" );
 *
 * DEBUG()
 *   If the 'file specific' debug class level >= level OR the system-wide
 *   DEBUGLEVEL (synomym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then
 *   generate a header using the default macros for file, line, and
 *   function name. Each call to DEBUG() generates a new header *unless* the
 *   previous debug output was unterminated (i.e. no '\n').
 *   See debug.c:dbghdr() for more info.
 *
 *   Example: DEBUG( 2, ("Some text and a value %d.\n", value) );
 *
 * DEBUGC()
 *   If the 'macro specified' debug class level >= level OR the system-wide
 *   DEBUGLEVEL (synomym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then
 *   generate a header using the default macros for file, line, and
 *   function name. Each call to DEBUG() generates a new header *unless* the
 *   previous debug output was unterminated (i.e. no '\n').
 *   See debug.c:dbghdr() for more info.
 *
 *   Example: DEBUGC( DBGC_TDB, 2, ("Some text and a value %d.\n", value) );
 *
 *  DEBUGADD(), DEBUGADDC()
 *    Same as DEBUG() and DEBUGC() except the text is appended to the previous
 *    DEBUG(), DEBUGC(), DEBUGADD(), DEBUGADDC() with out another interviening
 *    header.
 *
 *    Example: DEBUGADD( 2, ("Some text and a value %d.\n", value) );
 *             DEBUGADDC( DBGC_TDB, 2, ("Some text and a value %d.\n", value) );
 *
 * Note: If the debug class has not be redeined (see above) then the optimizer
 * will remove the extra conditional test.
 */

/*
 * From talloc.c:
 */

/* these macros gain us a few percent of speed on gcc */
#if (__GNUC__ >= 3)
/* the strange !! is to ensure that __builtin_expect() takes either 0 or 1
   as its first argument */
#ifndef likely
#define likely(x)   __builtin_expect(!!(x), 1)
#endif
#ifndef unlikely
#define unlikely(x) __builtin_expect(!!(x), 0)
#endif
#else
#ifndef likely
#define likely(x) (x)
#endif
#ifndef unlikely
#define unlikely(x) (x)
#endif
#endif

#define CHECK_DEBUGLVL( level ) \
  ( ((level) <= MAX_DEBUG_LEVEL) && \
    unlikely(DEBUGLEVEL_CLASS[ DBGC_CLASS ] >= (level)))

#define DEBUGLVL( level ) \
  ( CHECK_DEBUGLVL(level) \
   && dbghdrclass( level, DBGC_CLASS, __location__, __FUNCTION__ ) )


#define DEBUG( level, body ) \
  (void)( ((level) <= MAX_DEBUG_LEVEL) && \
	  unlikely(DEBUGLEVEL_CLASS[ DBGC_CLASS ] >= (level))		\
       && (dbghdrclass( level, DBGC_CLASS, __location__, __FUNCTION__ )) \
       && (dbgtext body) )

#define DEBUGC( dbgc_class, level, body ) \
  (void)( ((level) <= MAX_DEBUG_LEVEL) && \
	  unlikely(DEBUGLEVEL_CLASS[ dbgc_class ] >= (level))		\
       && (dbghdrclass( level, DBGC_CLASS, __location__, __FUNCTION__ )) \
       && (dbgtext body) )

#define DEBUGADD( level, body ) \
  (void)( ((level) <= MAX_DEBUG_LEVEL) && \
	  unlikely(DEBUGLEVEL_CLASS[ DBGC_CLASS ] >= (level))	\
       && (dbgtext body) )

#define DEBUGADDC( dbgc_class, level, body ) \
  (void)( ((level) <= MAX_DEBUG_LEVEL) && \
          unlikely((DEBUGLEVEL_CLASS[ dbgc_class ] >= (level))) \
       && (dbgtext body) )

/* Print a separator to the debug log. */
#define DEBUGSEP(level)\
	DEBUG((level),("===============================================================\n"))

/* The following definitions come from lib/debug.c  */

/** Possible destinations for the debug log (in order of precedence -
 * once set to DEBUG_FILE, it is not possible to reset to DEBUG_STDOUT
 * for example.  This makes it easy to override for debug to stderr on
 * the command line, as the smb.conf cannot reset it back to
 * file-based logging */
enum debug_logtype {DEBUG_DEFAULT_STDERR = 0, DEBUG_STDOUT = 1, DEBUG_FILE = 2, DEBUG_STDERR = 3};

struct debug_settings {
	size_t max_log_size;
	bool syslog;
	bool syslog_only;
	bool timestamp_logs;
	bool debug_prefix_timestamp;
	bool debug_hires_timestamp;
	bool debug_pid;
	bool debug_uid;
	bool debug_class;
};

void setup_logging(const char *prog_name, enum debug_logtype new_logtype);

void debug_close_dbf(void);
void gfree_debugsyms(void);
int debug_add_class(const char *classname);
int debug_lookup_classname(const char *classname);
bool debug_parse_levels(const char *params_str);
void debug_setup_talloc_log(void);
void debug_set_logfile(const char *name);
void debug_set_settings(struct debug_settings *settings);
bool reopen_logs_internal( void );
void force_check_log_size( void );
bool need_to_check_log_size( void );
void check_log_size( void );
void dbgflush( void );
bool dbghdrclass(int level, int cls, const char *location, const char *func);
bool dbghdr(int level, const char *location, const char *func);
bool debug_get_output_is_stderr(void);
void debug_schedule_reopen_logs(void);
char *debug_list_class_names_and_levels(void);

/**
  log suspicious usage - print comments and backtrace
*/	
_PUBLIC_ void log_suspicious_usage(const char *from, const char *info);

/**
  print suspicious usage - print comments and backtrace
*/	
_PUBLIC_ void print_suspicious_usage(const char* from, const char* info);
_PUBLIC_ uint32_t get_task_id(void);
_PUBLIC_ void log_task_id(void);

/* the debug operations structure - contains function pointers to
   various debug implementations of each operation */
struct debug_ops {
	/* function to log (using DEBUG) suspicious usage of data structure */
	void (*log_suspicious_usage)(const char* from, const char* info);

	/* function to log (using printf) suspicious usage of data structure.
	 * To be used in circumstances when using DEBUG would cause loop. */
	void (*print_suspicious_usage)(const char* from, const char* info);

	/* function to return process/thread id */
	uint32_t (*get_task_id)(void);

	/* function to log process/thread id */
	void (*log_task_id)(int fd);
};

/**
  register a set of debug handlers. 
*/
_PUBLIC_ void register_debug_handlers(const char *name, struct debug_ops *ops);

#endif