1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
25 #include "configuration.h"
26 #include "time_support.h"
40 static FILE* log_output
;
41 static log_callback_t
*log_callbacks
= NULL
;
43 static long long last_time
;
44 static long long current_time
;
46 static long long start
;
48 static char *log_strings
[5] =
59 /* The log_puts() serves to somewhat different goals:
62 * - feeding low-level info to the user in GDB or Telnet
64 * The latter dictates that strings without newline are not logged, lest there
65 * will be *MANY log lines when sending one char at the time(e.g.
69 static void log_puts(enum log_levels level
, const char *file
, int line
, const char *function
, const char *string
)
72 if (level
== LOG_LVL_OUTPUT
)
74 /* do not prepend any headers, just print out what we were given and return */
75 fputs(string
, log_output
);
80 f
= strrchr(file
, '/');
84 if (strchr(string
, '\n')!=NULL
)
86 if (debug_level
>= LOG_LVL_DEBUG
)
88 /* print with count and time information */
89 int t
=(int)(timeval_ms()-start
);
94 fprintf(log_output
, "%s %d %d %s:%d %s()"
98 ": %s", log_strings
[level
+1], count
, t
, file
, line
, function
,
106 /* print human readable output */
107 fprintf(log_output
, "%s%s",
108 (level
> LOG_LVL_USER
)?log_strings
[level
+1]:"", string
);
112 /* only entire lines are logged. Otherwise it's
113 * single chars intended for the log callbacks. */
118 /* Never forward LOG_LVL_DEBUG, too verbose and they can be found in the log if need be */
119 if (level
<= LOG_LVL_INFO
)
121 log_callback_t
*cb
, *next
;
123 /* DANGER!!!! the log callback can remove itself!!!! */
127 cb
->fn(cb
->priv
, file
, line
, function
, string
);
133 void log_printf(enum log_levels level
, const char *file
, int line
, const char *function
, const char *format
, ...)
139 if (level
> debug_level
)
142 va_start(ap
, format
);
144 string
= alloc_vprintf(format
, ap
);
147 log_puts(level
, file
, line
, function
, string
);
154 void log_printf_lf(enum log_levels level
, const char *file
, int line
, const char *function
, const char *format
, ...)
160 if (level
> debug_level
)
163 va_start(ap
, format
);
165 string
= alloc_vprintf(format
, ap
);
168 strcat(string
, "\n"); /* alloc_vprintf guaranteed the buffer to be at least one char longer */
169 log_puts(level
, file
, line
, function
, string
);
176 /* change the current debug level on the fly
179 * 2: + INFORMATIONAL MSGS
182 int handle_debug_level_command(struct command_context_s
*cmd_ctx
, char *cmd
, char **args
, int argc
)
185 command_print(cmd_ctx
, "debug_level: %i", debug_level
);
188 debug_level
= strtoul(args
[0], NULL
, 0);
199 int handle_log_output_command(struct command_context_s
*cmd_ctx
, char *cmd
, char **args
, int argc
)
203 FILE* file
= fopen(args
[0], "w");
214 int log_register_commands(struct command_context_s
*cmd_ctx
)
216 start
= timeval_ms();
217 register_command(cmd_ctx
, NULL
, "log_output", handle_log_output_command
,
218 COMMAND_ANY
, "redirect logging to <file> (default: stderr)");
219 register_command(cmd_ctx
, NULL
, "debug_level", handle_debug_level_command
,
220 COMMAND_ANY
, "adjust debug level <0-3>");
225 int log_init(struct command_context_s
*cmd_ctx
)
227 /* set defaults for daemon configuration, if not set by cmdline or cfgfile */
228 if (debug_level
== -1)
229 debug_level
= LOG_LVL_INFO
;
231 if (log_output
== NULL
)
236 start
=last_time
=timeval_ms();
241 int set_log_output(struct command_context_s
*cmd_ctx
, FILE *output
)
247 /* add/remove log callback handler */
248 int log_add_callback(log_callback_fn fn
, void *priv
)
252 /* prevent the same callback to be registered more than once, just for sure */
253 for (cb
= log_callbacks
; cb
; cb
= cb
->next
)
255 if (cb
->fn
== fn
&& cb
->priv
== priv
)
256 return ERROR_INVALID_ARGUMENTS
;
259 /* alloc memory, it is safe just to return in case of an error, no need for the caller to check this */
260 if ((cb
= malloc(sizeof(log_callback_t
))) == NULL
)
261 return ERROR_BUF_TOO_SMALL
;
263 /* add item to the beginning of the linked list */
266 cb
->next
= log_callbacks
;
272 int log_remove_callback(log_callback_fn fn
, void *priv
)
274 log_callback_t
*cb
, **p
;
276 for (p
= &log_callbacks
; (cb
= *p
); p
= &(*p
)->next
)
278 if (cb
->fn
== fn
&& cb
->priv
== priv
)
287 return ERROR_INVALID_ARGUMENTS
;
290 /* return allocated string w/printf() result */
291 char *alloc_vprintf(const char *fmt
, va_list ap
)
293 /* no buffer at the beginning, force realloc to do the job */
296 /* start with buffer size suitable for typical messages */
304 string
= realloc(string
, size
);
312 va_copy(ap_copy
, ap
);
314 ret
= vsnprintf(string
, size
, fmt
, ap_copy
);
315 /* NB! The result of the vsnprintf() might be an *EMPTY* string! */
316 if ((ret
>= 0) && ((ret
+ 1) < size
))
319 /* there was just enough or not enough space, allocate more in the next round */
320 size
*= 2; /* double the buffer size */
323 /* the returned buffer is by principle guaranteed to be at least one character longer */
327 char *alloc_printf(const char *format
, ...)
331 va_start(ap
, format
);
332 string
= alloc_vprintf(format
, ap
);
337 /* Code must return to the server loop before 1000ms has returned or invoke
340 * The GDB connection will time out if it spends >2000ms and you'll get nasty
341 * error messages from GDB:
343 * Ignoring packet error, continuing...
344 * Reply contains invalid hex digit 116
346 * While it is possible use "set remotetimeout" to more than the default 2000ms
347 * in GDB, OpenOCD guarantees that it sends keep-alive packages on the
348 * GDB protocol and it is a bug in OpenOCD not to either return to the server
349 * loop or invoke keep_alive() every 1000ms.
351 * This function will send a keep alive packet if >500ms has passed since last time
357 current_time
=timeval_ms();
358 if (current_time
-last_time
>1000)
360 LOG_WARNING("BUG: keep_alive() was not invoked in the 1000ms timelimit. GDB alive packet not sent! (%lld)", current_time
-last_time
);
361 last_time
=current_time
;
362 } else if (current_time
-last_time
>500)
364 /* this will keep the GDB connection alive */
365 LOG_USER_N("%s", "");
366 last_time
=current_time
;
370 /* reset keep alive timer without sending message */
373 current_time
=timeval_ms();
374 last_time
=current_time
;
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