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, see <http://www.gnu.org/licenses/>. *
23 ***************************************************************************/
31 #include "time_support.h"
35 #ifdef _DEBUG_FREE_SPACE_
39 #error "malloc.h is required to use --enable-malloc-logging"
45 static FILE *log_output
;
46 static struct log_callback
*log_callbacks
;
48 static long long last_time
;
49 static long long current_time
;
51 static long long start
;
53 static const char * const log_strings
[5] = {
56 "Warn : ", /* want a space after each colon, all same width, colons aligned */
63 static struct store_log_forward
*log_head
;
64 static int log_forward_count
;
66 struct store_log_forward
{
67 struct store_log_forward
*next
;
74 /* either forward the log to the listeners or store it for possible forwarding later */
75 static void log_forward(const char *file
, unsigned line
, const char *function
, const char *string
)
77 if (log_forward_count
== 0) {
78 struct log_callback
*cb
, *next
;
80 /* DANGER!!!! the log callback can remove itself!!!! */
83 cb
->fn(cb
->priv
, file
, line
, function
, string
);
87 struct store_log_forward
*log
= malloc(sizeof(struct store_log_forward
));
88 log
->file
= strdup(file
);
90 log
->function
= strdup(function
);
91 log
->string
= strdup(string
);
97 struct store_log_forward
*t
;
99 while (t
->next
!= NULL
)
106 /* The log_puts() serves to somewhat different goals:
109 * - feeding low-level info to the user in GDB or Telnet
111 * The latter dictates that strings without newline are not logged, lest there
112 * will be *MANY log lines when sending one char at the time(e.g.
116 static void log_puts(enum log_levels level
,
119 const char *function
,
123 if (level
== LOG_LVL_OUTPUT
) {
124 /* do not prepend any headers, just print out what we were given and return */
125 fputs(string
, log_output
);
130 f
= strrchr(file
, '/');
134 if (strlen(string
) > 0) {
135 if (debug_level
>= LOG_LVL_DEBUG
) {
136 /* print with count and time information */
137 int t
= (int)(timeval_ms()-start
);
138 #ifdef _DEBUG_FREE_SPACE_
139 struct mallinfo info
;
142 fprintf(log_output
, "%s%d %d %s:%d %s()"
143 #ifdef _DEBUG_FREE_SPACE_
146 ": %s", log_strings
[level
+ 1], count
, t
, file
, line
, function
,
147 #ifdef _DEBUG_FREE_SPACE_
152 /* if we are using gdb through pipes then we do not want any output
153 * to the pipe otherwise we get repeated strings */
154 fprintf(log_output
, "%s%s",
155 (level
> LOG_LVL_USER
) ? log_strings
[level
+ 1] : "", string
);
158 /* Empty strings are sent to log callbacks to keep e.g. gdbserver alive, here we do
164 /* Never forward LOG_LVL_DEBUG, too verbose and they can be found in the log if need be */
165 if (level
<= LOG_LVL_INFO
)
166 log_forward(file
, line
, function
, string
);
169 void log_printf(enum log_levels level
,
172 const char *function
,
180 if (level
> debug_level
)
183 va_start(ap
, format
);
185 string
= alloc_vprintf(format
, ap
);
186 if (string
!= NULL
) {
187 log_puts(level
, file
, line
, function
, string
);
194 void log_printf_lf(enum log_levels level
,
197 const char *function
,
205 if (level
> debug_level
)
208 va_start(ap
, format
);
210 string
= alloc_vprintf(format
, ap
);
211 if (string
!= NULL
) {
212 strcat(string
, "\n"); /* alloc_vprintf guaranteed the buffer to be at least one
214 log_puts(level
, file
, line
, function
, string
);
221 COMMAND_HANDLER(handle_debug_level_command
)
225 COMMAND_PARSE_NUMBER(int, CMD_ARGV
[0], new_level
);
226 if ((new_level
> LOG_LVL_DEBUG
) || (new_level
< LOG_LVL_SILENT
)) {
227 LOG_ERROR("level must be between %d and %d", LOG_LVL_SILENT
, LOG_LVL_DEBUG
);
228 return ERROR_COMMAND_SYNTAX_ERROR
;
230 debug_level
= new_level
;
231 } else if (CMD_ARGC
> 1)
232 return ERROR_COMMAND_SYNTAX_ERROR
;
234 command_print(CMD_CTX
, "debug_level: %i", debug_level
);
239 COMMAND_HANDLER(handle_log_output_command
)
242 FILE *file
= fopen(CMD_ARGV
[0], "w");
251 static struct command_registration log_command_handlers
[] = {
253 .name
= "log_output",
254 .handler
= handle_log_output_command
,
256 .help
= "redirect logging to a file (default: stderr)",
257 .usage
= "file_name",
260 .name
= "debug_level",
261 .handler
= handle_debug_level_command
,
263 .help
= "Sets the verbosity level of debugging output. "
264 "0 shows errors only; 1 adds warnings; "
265 "2 (default) adds other info; 3 adds debugging.",
268 COMMAND_REGISTRATION_DONE
271 int log_register_commands(struct command_context
*cmd_ctx
)
273 return register_commands(cmd_ctx
, NULL
, log_command_handlers
);
278 /* set defaults for daemon configuration,
279 * if not set by cmdline or cfgfile */
280 if (debug_level
== -1)
281 debug_level
= LOG_LVL_INFO
;
283 char *debug_env
= getenv("OPENOCD_DEBUG_LEVEL");
284 if (NULL
!= debug_env
) {
286 int retval
= parse_int(debug_env
, &value
);
287 if (ERROR_OK
== retval
&&
288 debug_level
>= LOG_LVL_SILENT
&&
289 debug_level
<= LOG_LVL_DEBUG
)
293 if (log_output
== NULL
)
296 start
= last_time
= timeval_ms();
299 int set_log_output(struct command_context
*cmd_ctx
, FILE *output
)
305 /* add/remove log callback handler */
306 int log_add_callback(log_callback_fn fn
, void *priv
)
308 struct log_callback
*cb
;
310 /* prevent the same callback to be registered more than once, just for sure */
311 for (cb
= log_callbacks
; cb
; cb
= cb
->next
) {
312 if (cb
->fn
== fn
&& cb
->priv
== priv
)
313 return ERROR_COMMAND_SYNTAX_ERROR
;
316 /* alloc memory, it is safe just to return in case of an error, no need for the caller to
318 cb
= malloc(sizeof(struct log_callback
));
320 return ERROR_BUF_TOO_SMALL
;
322 /* add item to the beginning of the linked list */
325 cb
->next
= log_callbacks
;
331 int log_remove_callback(log_callback_fn fn
, void *priv
)
333 struct log_callback
*cb
, **p
;
335 for (p
= &log_callbacks
; (cb
= *p
); p
= &(*p
)->next
) {
336 if (cb
->fn
== fn
&& cb
->priv
== priv
) {
344 return ERROR_COMMAND_SYNTAX_ERROR
;
347 /* return allocated string w/printf() result */
348 char *alloc_vprintf(const char *fmt
, va_list ap
)
354 /* determine the length of the buffer needed */
355 va_copy(ap_copy
, ap
);
356 len
= vsnprintf(NULL
, 0, fmt
, ap_copy
);
359 /* allocate and make room for terminating zero. */
360 /* FIXME: The old version always allocated at least one byte extra and
361 * other code depend on that. They should be probably be fixed, but for
362 * now reserve the extra byte. */
363 string
= malloc(len
+ 2);
367 /* do the real work */
368 vsnprintf(string
, len
+ 1, fmt
, ap
);
373 char *alloc_printf(const char *format
, ...)
377 va_start(ap
, format
);
378 string
= alloc_vprintf(format
, ap
);
383 /* Code must return to the server loop before 1000ms has returned or invoke
386 * The GDB connection will time out if it spends >2000ms and you'll get nasty
387 * error messages from GDB:
389 * Ignoring packet error, continuing...
390 * Reply contains invalid hex digit 116
392 * While it is possible use "set remotetimeout" to more than the default 2000ms
393 * in GDB, OpenOCD guarantees that it sends keep-alive packages on the
394 * GDB protocol and it is a bug in OpenOCD not to either return to the server
395 * loop or invoke keep_alive() every 1000ms.
397 * This function will send a keep alive packet if >500ms has passed since last time
400 * Note that this function can be invoked often, so it needs to be relatively
401 * fast when invoked more often than every 500ms.
406 current_time
= timeval_ms();
407 if (current_time
-last_time
> 1000) {
408 extern int gdb_actual_connections
;
410 if (gdb_actual_connections
)
411 LOG_WARNING("keep_alive() was not invoked in the "
412 "1000ms timelimit. GDB alive packet not "
413 "sent! (%lld). Workaround: increase "
414 "\"set remotetimeout\" in GDB",
415 current_time
-last_time
);
417 LOG_DEBUG("keep_alive() was not invoked in the "
418 "1000ms timelimit (%lld). This may cause "
419 "trouble with GDB connections.",
420 current_time
-last_time
);
422 if (current_time
-last_time
> 500) {
423 /* this will keep the GDB connection alive */
424 LOG_USER_N("%s", "");
426 /* DANGER!!!! do not add code to invoke e.g. target event processing,
427 * jim timer processing, etc. it can cause infinite recursion +
428 * jim event callbacks need to happen at a well defined time,
429 * not anywhere keep_alive() is invoked.
431 * These functions should be invoked at a well defined spot in server.c
434 last_time
= current_time
;
438 /* reset keep alive timer without sending message */
441 current_time
= timeval_ms();
442 last_time
= current_time
;
445 /* if we sleep for extended periods of time, we must invoke keep_alive() intermittantly */
446 void alive_sleep(uint64_t ms
)
448 uint64_t napTime
= 10;
449 for (uint64_t i
= 0; i
< ms
; i
+= napTime
) {
450 uint64_t sleep_a_bit
= ms
- i
;
451 if (sleep_a_bit
> napTime
)
452 sleep_a_bit
= napTime
;
454 usleep(sleep_a_bit
* 1000);
459 void busy_sleep(uint64_t ms
)
461 uint64_t then
= timeval_ms();
462 while (timeval_ms() - then
< ms
) {
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