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 int64_t last_time
;
49 static int64_t current_time
;
53 static const char * const log_strings
[6] = {
56 "Warn : ", /* want a space after each colon, all same width, colons aligned */
64 static struct store_log_forward
*log_head
;
65 static int log_forward_count
;
67 struct store_log_forward
{
68 struct store_log_forward
*next
;
75 /* either forward the log to the listeners or store it for possible forwarding later */
76 static void log_forward(const char *file
, unsigned line
, const char *function
, const char *string
)
78 if (log_forward_count
== 0) {
79 struct log_callback
*cb
, *next
;
81 /* DANGER!!!! the log callback can remove itself!!!! */
84 cb
->fn(cb
->priv
, file
, line
, function
, string
);
88 struct store_log_forward
*log
= malloc(sizeof(struct store_log_forward
));
89 log
->file
= strdup(file
);
91 log
->function
= strdup(function
);
92 log
->string
= strdup(string
);
98 struct store_log_forward
*t
;
100 while (t
->next
!= NULL
)
107 /* The log_puts() serves two somewhat different goals:
110 * - feeding low-level info to the user in GDB or Telnet
112 * The latter dictates that strings without newline are not logged, lest there
113 * will be *MANY log lines when sending one char at the time(e.g.
117 static void log_puts(enum log_levels level
,
120 const char *function
,
124 if (level
== LOG_LVL_OUTPUT
) {
125 /* do not prepend any headers, just print out what we were given and return */
126 fputs(string
, log_output
);
131 f
= strrchr(file
, '/');
135 if (strlen(string
) > 0) {
136 if (debug_level
>= LOG_LVL_DEBUG
) {
137 /* print with count and time information */
138 int64_t t
= timeval_ms() - start
;
139 #ifdef _DEBUG_FREE_SPACE_
140 struct mallinfo info
;
143 fprintf(log_output
, "%s%d %" PRId64
" %s:%d %s()"
144 #ifdef _DEBUG_FREE_SPACE_
147 ": %s", log_strings
[level
+ 1], count
, t
, file
, line
, function
,
148 #ifdef _DEBUG_FREE_SPACE_
153 /* if we are using gdb through pipes then we do not want any output
154 * to the pipe otherwise we get repeated strings */
155 fprintf(log_output
, "%s%s",
156 (level
> LOG_LVL_USER
) ? log_strings
[level
+ 1] : "", string
);
159 /* Empty strings are sent to log callbacks to keep e.g. gdbserver alive, here we do
165 /* Never forward LOG_LVL_DEBUG, too verbose and they can be found in the log if need be */
166 if (level
<= LOG_LVL_INFO
)
167 log_forward(file
, line
, function
, string
);
170 void log_printf(enum log_levels level
,
173 const char *function
,
181 if (level
> debug_level
)
184 va_start(ap
, format
);
186 string
= alloc_vprintf(format
, ap
);
187 if (string
!= NULL
) {
188 log_puts(level
, file
, line
, function
, string
);
195 void log_vprintf_lf(enum log_levels level
, const char *file
, unsigned line
,
196 const char *function
, const char *format
, va_list args
)
202 if (level
> debug_level
)
205 tmp
= alloc_vprintf(format
, args
);
211 * Note: alloc_vprintf() guarantees that the buffer is at least one
215 log_puts(level
, file
, line
, function
, tmp
);
219 void log_printf_lf(enum log_levels level
,
222 const char *function
,
228 va_start(ap
, format
);
229 log_vprintf_lf(level
, file
, line
, function
, format
, ap
);
233 COMMAND_HANDLER(handle_debug_level_command
)
237 COMMAND_PARSE_NUMBER(int, CMD_ARGV
[0], new_level
);
238 if ((new_level
> LOG_LVL_DEBUG_IO
) || (new_level
< LOG_LVL_SILENT
)) {
239 LOG_ERROR("level must be between %d and %d", LOG_LVL_SILENT
, LOG_LVL_DEBUG_IO
);
240 return ERROR_COMMAND_SYNTAX_ERROR
;
242 debug_level
= new_level
;
243 } else if (CMD_ARGC
> 1)
244 return ERROR_COMMAND_SYNTAX_ERROR
;
246 command_print(CMD_CTX
, "debug_level: %i", debug_level
);
251 COMMAND_HANDLER(handle_log_output_command
)
254 FILE *file
= fopen(CMD_ARGV
[0], "w");
256 LOG_ERROR("failed to open output log '%s'", CMD_ARGV
[0]);
259 if (log_output
!= stderr
&& log_output
!= NULL
) {
260 /* Close previous log file, if it was open and wasn't stderr. */
269 static struct command_registration log_command_handlers
[] = {
271 .name
= "log_output",
272 .handler
= handle_log_output_command
,
274 .help
= "redirect logging to a file (default: stderr)",
275 .usage
= "file_name",
278 .name
= "debug_level",
279 .handler
= handle_debug_level_command
,
281 .help
= "Sets the verbosity level of debugging output. "
282 "0 shows errors only; 1 adds warnings; "
283 "2 (default) adds other info; 3 adds debugging; "
284 "4 adds extra verbose debugging.",
287 COMMAND_REGISTRATION_DONE
290 int log_register_commands(struct command_context
*cmd_ctx
)
292 return register_commands(cmd_ctx
, NULL
, log_command_handlers
);
297 /* set defaults for daemon configuration,
298 * if not set by cmdline or cfgfile */
299 if (debug_level
== -1)
300 debug_level
= LOG_LVL_INFO
;
302 char *debug_env
= getenv("OPENOCD_DEBUG_LEVEL");
303 if (NULL
!= debug_env
) {
305 int retval
= parse_int(debug_env
, &value
);
306 if (ERROR_OK
== retval
&&
307 debug_level
>= LOG_LVL_SILENT
&&
308 debug_level
<= LOG_LVL_DEBUG_IO
)
312 if (log_output
== NULL
)
315 start
= last_time
= timeval_ms();
318 int set_log_output(struct command_context
*cmd_ctx
, FILE *output
)
324 /* add/remove log callback handler */
325 int log_add_callback(log_callback_fn fn
, void *priv
)
327 struct log_callback
*cb
;
329 /* prevent the same callback to be registered more than once, just for sure */
330 for (cb
= log_callbacks
; cb
; cb
= cb
->next
) {
331 if (cb
->fn
== fn
&& cb
->priv
== priv
)
332 return ERROR_COMMAND_SYNTAX_ERROR
;
335 /* alloc memory, it is safe just to return in case of an error, no need for the caller to
337 cb
= malloc(sizeof(struct log_callback
));
339 return ERROR_BUF_TOO_SMALL
;
341 /* add item to the beginning of the linked list */
344 cb
->next
= log_callbacks
;
350 int log_remove_callback(log_callback_fn fn
, void *priv
)
352 struct log_callback
*cb
, **p
;
354 for (p
= &log_callbacks
; (cb
= *p
); p
= &(*p
)->next
) {
355 if (cb
->fn
== fn
&& cb
->priv
== priv
) {
363 return ERROR_COMMAND_SYNTAX_ERROR
;
366 /* return allocated string w/printf() result */
367 char *alloc_vprintf(const char *fmt
, va_list ap
)
373 /* determine the length of the buffer needed */
374 va_copy(ap_copy
, ap
);
375 len
= vsnprintf(NULL
, 0, fmt
, ap_copy
);
378 /* allocate and make room for terminating zero. */
379 /* FIXME: The old version always allocated at least one byte extra and
380 * other code depend on that. They should be probably be fixed, but for
381 * now reserve the extra byte. */
382 string
= malloc(len
+ 2);
386 /* do the real work */
387 vsnprintf(string
, len
+ 1, fmt
, ap
);
392 char *alloc_printf(const char *format
, ...)
396 va_start(ap
, format
);
397 string
= alloc_vprintf(format
, ap
);
402 /* Code must return to the server loop before 1000ms has returned or invoke
405 * The GDB connection will time out if it spends >2000ms and you'll get nasty
406 * error messages from GDB:
408 * Ignoring packet error, continuing...
409 * Reply contains invalid hex digit 116
411 * While it is possible use "set remotetimeout" to more than the default 2000ms
412 * in GDB, OpenOCD guarantees that it sends keep-alive packages on the
413 * GDB protocol and it is a bug in OpenOCD not to either return to the server
414 * loop or invoke keep_alive() every 1000ms.
416 * This function will send a keep alive packet if >500ms has passed since last time
419 * Note that this function can be invoked often, so it needs to be relatively
420 * fast when invoked more often than every 500ms.
425 current_time
= timeval_ms();
426 if (current_time
-last_time
> 1000) {
427 extern int gdb_actual_connections
;
429 if (gdb_actual_connections
)
430 LOG_WARNING("keep_alive() was not invoked in the "
431 "1000ms timelimit. GDB alive packet not "
432 "sent! (%" PRId64
"). Workaround: increase "
433 "\"set remotetimeout\" in GDB",
434 current_time
-last_time
);
436 LOG_DEBUG("keep_alive() was not invoked in the "
437 "1000ms timelimit (%" PRId64
"). This may cause "
438 "trouble with GDB connections.",
439 current_time
-last_time
);
441 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
) {
469 uint64_t sleep_a_bit
= ms
- i
;
470 if (sleep_a_bit
> napTime
)
471 sleep_a_bit
= napTime
;
473 usleep(sleep_a_bit
* 1000);
478 void busy_sleep(uint64_t ms
)
480 uint64_t then
= timeval_ms();
481 while (timeval_ms() - then
< ms
) {