1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2007-2010 Øyvind Harboe *
6 * oyvind.harboe@zylin.com *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
16 * This program is distributed in the hope that it will be useful, *
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
19 * GNU General Public License for more details. *
21 * You should have received a copy of the GNU General Public License *
22 * along with this program; if not, write to the *
23 * Free Software Foundation, Inc., *
24 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
25 ***************************************************************************/
30 #include "time_support.h"
31 // @todo the inclusion of server.h here is a layering violation
32 #include <server/server.h>
36 #ifdef _DEBUG_FREE_SPACE_
40 #error "malloc.h is required to use --enable-malloc-logging"
46 static FILE* log_output
;
47 static struct log_callback
*log_callbacks
= NULL
;
49 static long long last_time
;
50 static long long current_time
;
52 static long long start
;
54 static char *log_strings
[5] =
58 "Warn : ", /* want a space after each colon, all same width, colons aligned */
67 static struct store_log_forward
* log_head
= NULL
;
68 static int log_forward_count
= 0;
70 struct store_log_forward
72 struct store_log_forward
* next
;
75 const char * function
;
79 /* either forward the log to the listeners or store it for possible forwarding later */
80 static void log_forward(const char *file
, unsigned line
, const char *function
, const char *string
)
82 if (log_forward_count
==0)
84 struct log_callback
*cb
, *next
;
86 /* DANGER!!!! the log callback can remove itself!!!! */
90 cb
->fn(cb
->priv
, file
, line
, function
, string
);
95 struct store_log_forward
*log
= malloc(sizeof (struct store_log_forward
));
96 log
->file
= strdup(file
);
98 log
->function
= strdup(function
);
99 log
->string
= strdup(string
);
106 struct store_log_forward
* t
;
108 while (t
->next
!=NULL
)
117 /* The log_puts() serves to somewhat different goals:
120 * - feeding low-level info to the user in GDB or Telnet
122 * The latter dictates that strings without newline are not logged, lest there
123 * will be *MANY log lines when sending one char at the time(e.g.
127 static void log_puts(enum log_levels level
, const char *file
, int line
, const char *function
, const char *string
)
130 if (level
== LOG_LVL_OUTPUT
)
132 /* do not prepend any headers, just print out what we were given and return */
133 fputs(string
, log_output
);
138 f
= strrchr(file
, '/');
142 if (strlen(string
) > 0)
144 if (debug_level
>= LOG_LVL_DEBUG
)
146 /* print with count and time information */
147 int t
= (int)(timeval_ms()-start
);
148 #ifdef _DEBUG_FREE_SPACE_
149 struct mallinfo info
;
152 fprintf(log_output
, "%s%d %d %s:%d %s()"
153 #ifdef _DEBUG_FREE_SPACE_
156 ": %s", log_strings
[level
+ 1], count
, t
, file
, line
, function
,
157 #ifdef _DEBUG_FREE_SPACE_
164 /* if we are using gdb through pipes then we do not want any output
165 * to the pipe otherwise we get repeated strings */
166 fprintf(log_output
, "%s%s",
167 (level
> LOG_LVL_USER
)?log_strings
[level
+ 1]:"", string
);
171 /* Empty strings are sent to log callbacks to keep e.g. gdbserver alive, here we do nothing. */
176 /* Never forward LOG_LVL_DEBUG, too verbose and they can be found in the log if need be */
177 if (level
<= LOG_LVL_INFO
)
179 log_forward(file
, line
, function
, string
);
184 void log_printf(enum log_levels level
, const char *file
, unsigned line
, const char *function
, const char *format
, ...)
190 if (level
> debug_level
)
193 va_start(ap
, format
);
195 string
= alloc_vprintf(format
, ap
);
198 log_puts(level
, file
, line
, function
, string
);
205 void log_printf_lf(enum log_levels level
, const char *file
, unsigned line
, const char *function
, const char *format
, ...)
211 if (level
> debug_level
)
214 va_start(ap
, format
);
216 string
= alloc_vprintf(format
, ap
);
219 strcat(string
, "\n"); /* alloc_vprintf guaranteed the buffer to be at least one char longer */
220 log_puts(level
, file
, line
, function
, string
);
227 /* change the current debug level on the fly
230 * 2: + INFORMATIONAL MSGS
233 COMMAND_HANDLER(handle_debug_level_command
)
238 COMMAND_PARSE_NUMBER(uint
, CMD_ARGV
[0], new_level
);
239 debug_level
= MIN(new_level
, LOG_LVL_DEBUG
);
241 else if (CMD_ARGC
> 1)
242 return ERROR_COMMAND_SYNTAX_ERROR
;
244 command_print(CMD_CTX
, "debug_level: %i", debug_level
);
249 COMMAND_HANDLER(handle_log_output_command
)
253 FILE* file
= fopen(CMD_ARGV
[0], "w");
264 static struct command_registration log_command_handlers
[] = {
266 .name
= "log_output",
267 .handler
= handle_log_output_command
,
269 .help
= "redirect logging to a file (default: stderr)",
270 .usage
= "file_name",
273 .name
= "debug_level",
274 .handler
= handle_debug_level_command
,
276 .help
= "Sets the verbosity level of debugging output. "
277 "0 shows errors only; 1 adds warnings; "
278 "2 (default) adds other info; 3 adds debugging.",
281 COMMAND_REGISTRATION_DONE
284 int log_register_commands(struct command_context
*cmd_ctx
)
286 return register_commands(cmd_ctx
, NULL
, log_command_handlers
);
291 /* set defaults for daemon configuration,
292 * if not set by cmdline or cfgfile */
293 if (debug_level
== -1)
294 debug_level
= LOG_LVL_INFO
;
296 char *debug_env
= getenv("OPENOCD_DEBUG_LEVEL");
297 if (NULL
!= debug_env
)
300 int retval
= parse_int(debug_env
, &value
);
301 if (ERROR_OK
== retval
&&
302 debug_level
>= LOG_LVL_SILENT
&&
303 debug_level
<= LOG_LVL_DEBUG
)
309 if (log_output
== NULL
)
312 start
= last_time
= timeval_ms();
315 int set_log_output(struct command_context
*cmd_ctx
, FILE *output
)
321 /* add/remove log callback handler */
322 int log_add_callback(log_callback_fn fn
, void *priv
)
324 struct log_callback
*cb
;
326 /* prevent the same callback to be registered more than once, just for sure */
327 for (cb
= log_callbacks
; cb
; cb
= cb
->next
)
329 if (cb
->fn
== fn
&& cb
->priv
== priv
)
330 return ERROR_INVALID_ARGUMENTS
;
333 /* alloc memory, it is safe just to return in case of an error, no need for the caller to check this */
334 if ((cb
= malloc(sizeof(struct log_callback
))) == NULL
)
335 return ERROR_BUF_TOO_SMALL
;
337 /* add item to the beginning of the linked list */
340 cb
->next
= log_callbacks
;
346 int log_remove_callback(log_callback_fn fn
, void *priv
)
348 struct log_callback
*cb
, **p
;
350 for (p
= &log_callbacks
; (cb
= *p
); p
= &(*p
)->next
)
352 if (cb
->fn
== fn
&& cb
->priv
== priv
)
361 return ERROR_INVALID_ARGUMENTS
;
364 /* return allocated string w/printf() result */
365 char *alloc_vprintf(const char *fmt
, va_list ap
)
371 /* determine the length of the buffer needed */
372 va_copy(ap_copy
, ap
);
373 len
= vsnprintf(NULL
, 0, fmt
, ap_copy
);
376 /* allocate and make room for terminating zero. */
377 /* FIXME: The old version always allocated at least one byte extra and
378 * other code depend on that. They should be probably be fixed, but for
379 * now reserve the extra byte. */
380 string
= malloc(len
+ 2);
384 /* do the real work */
385 vsnprintf(string
, len
+ 1, fmt
, ap
);
390 char *alloc_printf(const char *format
, ...)
394 va_start(ap
, format
);
395 string
= alloc_vprintf(format
, ap
);
400 /* Code must return to the server loop before 1000ms has returned or invoke
403 * The GDB connection will time out if it spends >2000ms and you'll get nasty
404 * error messages from GDB:
406 * Ignoring packet error, continuing...
407 * Reply contains invalid hex digit 116
409 * While it is possible use "set remotetimeout" to more than the default 2000ms
410 * in GDB, OpenOCD guarantees that it sends keep-alive packages on the
411 * GDB protocol and it is a bug in OpenOCD not to either return to the server
412 * loop or invoke keep_alive() every 1000ms.
414 * This function will send a keep alive packet if >500ms has passed since last time
417 * Note that this function can be invoked often, so it needs to be relatively
418 * fast when invoked more often than every 500ms.
423 current_time
= timeval_ms();
424 if (current_time
-last_time
> 1000)
426 extern int gdb_actual_connections
;
428 if (gdb_actual_connections
)
429 LOG_WARNING("keep_alive() was not invoked in the "
430 "1000ms timelimit. GDB alive packet not "
431 "sent! (%lld). Workaround: increase "
432 "\"set remotetimeout\" in GDB",
433 current_time
-last_time
);
435 LOG_DEBUG("keep_alive() was not invoked in the "
436 "1000ms timelimit (%lld). This may cause "
437 "trouble with GDB connections.",
438 current_time
-last_time
);
440 if (current_time
-last_time
> 500)
442 /* this will keep the GDB connection alive */
443 LOG_USER_N("%s", "");
445 /* DANGER!!!! do not add code to invoke e.g. target event processing,
446 * jim timer processing, etc. it can cause infinite recursion +
447 * jim event callbacks need to happen at a well defined time,
448 * not anywhere keep_alive() is invoked.
450 * These functions should be invoked at a well defined spot in server.c
453 last_time
= current_time
;
457 /* reset keep alive timer without sending message */
460 current_time
= timeval_ms();
461 last_time
= current_time
;
464 /* if we sleep for extended periods of time, we must invoke keep_alive() intermittantly */
465 void alive_sleep(uint64_t ms
)
467 uint64_t napTime
= 10;
468 for (uint64_t i
= 0; i
< ms
; i
+= napTime
)
470 uint64_t sleep_a_bit
= ms
- i
;
471 if (sleep_a_bit
> napTime
)
472 sleep_a_bit
= napTime
;
474 usleep(sleep_a_bit
* 1000);
479 void busy_sleep(uint64_t ms
)
481 uint64_t then
= timeval_ms();
482 while (timeval_ms() - then
< ms
)