blob: 8dbc4184887194a9b590a760e9d39646b9c19917 [file] [log] [blame]
Willy Tarreau4e2b6462019-05-16 17:44:30 +02001/*
2 * Process debugging functions.
3 *
4 * Copyright 2000-2019 Willy Tarreau <willy@haproxy.org>.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
13#include <signal.h>
14#include <time.h>
15#include <stdio.h>
Willy Tarreau6bdf3e92019-05-20 14:25:05 +020016#include <stdlib.h>
Willy Tarreau4e2b6462019-05-16 17:44:30 +020017
Willy Tarreau5cf64dd2019-05-17 10:36:08 +020018#include <common/buf.h>
Willy Tarreau4e2b6462019-05-16 17:44:30 +020019#include <common/config.h>
20#include <common/debug.h>
21#include <common/hathreads.h>
22#include <common/initcall.h>
23#include <common/standard.h>
24
25#include <types/global.h>
26
27#include <proto/cli.h>
28#include <proto/fd.h>
Willy Tarreau78a7cb62019-08-21 14:16:02 +020029#include <proto/hlua.h>
Willy Tarreau4e2b6462019-05-16 17:44:30 +020030#include <proto/stream_interface.h>
31#include <proto/task.h>
32
Willy Tarreaua37cb182019-07-31 19:20:39 +020033/* mask of threads still having to dump, used to respect ordering. Only used
34 * when USE_THREAD_DUMP is set.
35 */
36volatile unsigned long threads_to_dump = 0;
37
Willy Tarreau5cf64dd2019-05-17 10:36:08 +020038/* Dumps to the buffer some known information for the desired thread, and
39 * optionally extra info for the current thread. The dump will be appended to
40 * the buffer, so the caller is responsible for preliminary initializing it.
41 * The calling thread ID needs to be passed in <calling_tid> to display a star
Willy Tarreaue6a02fa2019-05-22 07:06:44 +020042 * in front of the calling thread's line (usually it's tid). Any stuck thread
43 * is also prefixed with a '>'.
Willy Tarreau4e2b6462019-05-16 17:44:30 +020044 */
Willy Tarreau5cf64dd2019-05-17 10:36:08 +020045void ha_thread_dump(struct buffer *buf, int thr, int calling_tid)
Willy Tarreau4e2b6462019-05-16 17:44:30 +020046{
47 unsigned long thr_bit = 1UL << thr;
David Carliera92c5ce2019-09-13 05:03:12 +010048 unsigned long long p = ha_thread_info[thr].prev_cpu_time;
49 unsigned long long n = now_cpu_time_thread(&ha_thread_info[thr]);
50 int stuck = !!(ha_thread_info[thr].flags & TI_FL_STUCK);
Willy Tarreau4e2b6462019-05-16 17:44:30 +020051
Willy Tarreau5cf64dd2019-05-17 10:36:08 +020052 chunk_appendf(buf,
Willy Tarreaue6a02fa2019-05-22 07:06:44 +020053 "%c%cThread %-2u: act=%d glob=%d wq=%d rq=%d tl=%d tlsz=%d rqsz=%d\n"
Olivier Houchard305d5ab2019-07-24 18:07:06 +020054 " stuck=%d prof=%d",
Willy Tarreaue6a02fa2019-05-22 07:06:44 +020055 (thr == calling_tid) ? '*' : ' ', stuck ? '>' : ' ', thr + 1,
Olivier Houchardcfbb3e62019-05-29 19:22:43 +020056 thread_has_tasks(),
Willy Tarreau4e2b6462019-05-16 17:44:30 +020057 !!(global_tasks_mask & thr_bit),
58 !eb_is_empty(&task_per_thread[thr].timers),
59 !eb_is_empty(&task_per_thread[thr].rqueue),
Olivier Houchard06910462019-10-11 16:35:01 +020060 !(LIST_ISEMPTY(&task_per_thread[thr].task_list) |
61 MT_LIST_ISEMPTY(&task_per_thread[thr].shared_tasklet_list)),
Willy Tarreau4e2b6462019-05-16 17:44:30 +020062 task_per_thread[thr].task_list_size,
63 task_per_thread[thr].rqueue_size,
Willy Tarreaue6a02fa2019-05-22 07:06:44 +020064 stuck,
Willy Tarreau4e2b6462019-05-16 17:44:30 +020065 !!(task_profiling_mask & thr_bit));
66
Willy Tarreau5cf64dd2019-05-17 10:36:08 +020067 chunk_appendf(buf,
Willy Tarreau4e2b6462019-05-16 17:44:30 +020068 " harmless=%d wantrdv=%d",
69 !!(threads_harmless_mask & thr_bit),
70 !!(threads_want_rdv_mask & thr_bit));
Willy Tarreau4e2b6462019-05-16 17:44:30 +020071
Willy Tarreau5cf64dd2019-05-17 10:36:08 +020072 chunk_appendf(buf, "\n");
Willy Tarreau9c8800a2019-05-20 20:52:20 +020073 chunk_appendf(buf, " cpu_ns: poll=%llu now=%llu diff=%llu\n", p, n, n-p);
Willy Tarreau4e2b6462019-05-16 17:44:30 +020074
75 /* this is the end of what we can dump from outside the thread */
76
77 if (thr != tid)
78 return;
79
Willy Tarreau5cf64dd2019-05-17 10:36:08 +020080 chunk_appendf(buf, " curr_task=");
Willy Tarreaud022e9c2019-09-24 08:25:15 +020081 ha_task_dump(buf, sched->current, " ");
Willy Tarreau4e2b6462019-05-16 17:44:30 +020082}
83
84
Willy Tarreau5cf64dd2019-05-17 10:36:08 +020085/* dumps into the buffer some information related to task <task> (which may
Willy Tarreau4e2b6462019-05-16 17:44:30 +020086 * either be a task or a tasklet, and prepend each line except the first one
Willy Tarreau5cf64dd2019-05-17 10:36:08 +020087 * with <pfx>. The buffer is only appended and the first output starts by the
88 * pointer itself. The caller is responsible for making sure the task is not
89 * going to vanish during the dump.
Willy Tarreau4e2b6462019-05-16 17:44:30 +020090 */
Willy Tarreau5cf64dd2019-05-17 10:36:08 +020091void ha_task_dump(struct buffer *buf, const struct task *task, const char *pfx)
Willy Tarreau4e2b6462019-05-16 17:44:30 +020092{
Willy Tarreau578ea8b2019-05-22 09:43:09 +020093 const struct stream *s = NULL;
Willy Tarreaua512b022019-08-21 14:12:19 +020094 const struct appctx __maybe_unused *appctx = NULL;
Willy Tarreau78a7cb62019-08-21 14:16:02 +020095 struct hlua __maybe_unused *hlua = NULL;
Willy Tarreau578ea8b2019-05-22 09:43:09 +020096
Willy Tarreau14a1ab72019-05-17 10:34:25 +020097 if (!task) {
Willy Tarreau5cf64dd2019-05-17 10:36:08 +020098 chunk_appendf(buf, "0\n");
Willy Tarreau231ec392019-05-17 10:39:47 +020099 return;
100 }
101
Willy Tarreau20db9112019-05-17 14:14:35 +0200102 if (TASK_IS_TASKLET(task))
103 chunk_appendf(buf,
104 "%p (tasklet) calls=%u\n",
105 task,
106 task->calls);
107 else
108 chunk_appendf(buf,
109 "%p (task) calls=%u last=%llu%s\n",
110 task,
111 task->calls,
112 task->call_date ? (unsigned long long)(now_mono_time() - task->call_date) : 0,
113 task->call_date ? " ns ago" : "");
Willy Tarreau4e2b6462019-05-16 17:44:30 +0200114
Willy Tarreau5cf64dd2019-05-17 10:36:08 +0200115 chunk_appendf(buf, "%s"
Willy Tarreaua512b022019-08-21 14:12:19 +0200116 " fct=%p (%s) ctx=%p",
Willy Tarreau4e2b6462019-05-16 17:44:30 +0200117 pfx,
Willy Tarreau14a1ab72019-05-17 10:34:25 +0200118 task->process,
119 task->process == process_stream ? "process_stream" :
120 task->process == task_run_applet ? "task_run_applet" :
121 task->process == si_cs_io_cb ? "si_cs_io_cb" :
Willy Tarreau78a7cb62019-08-21 14:16:02 +0200122#ifdef USE_LUA
123 task->process == hlua_process_task ? "hlua_process_task" :
124#endif
Willy Tarreau4e2b6462019-05-16 17:44:30 +0200125 "?",
Willy Tarreau14a1ab72019-05-17 10:34:25 +0200126 task->context);
Willy Tarreau578ea8b2019-05-22 09:43:09 +0200127
Willy Tarreaua512b022019-08-21 14:12:19 +0200128 if (task->process == task_run_applet && (appctx = task->context))
129 chunk_appendf(buf, "(%s)\n", appctx->applet->name);
130 else
131 chunk_appendf(buf, "\n");
132
Willy Tarreau578ea8b2019-05-22 09:43:09 +0200133 if (task->process == process_stream && task->context)
134 s = (struct stream *)task->context;
135 else if (task->process == task_run_applet && task->context)
136 s = si_strm(((struct appctx *)task->context)->owner);
137 else if (task->process == si_cs_io_cb && task->context)
138 s = si_strm((struct stream_interface *)task->context);
139
140 if (s)
141 stream_dump(buf, s, pfx, '\n');
Willy Tarreau78a7cb62019-08-21 14:16:02 +0200142
143#ifdef USE_LUA
144 hlua = NULL;
145 if (s && (hlua = s->hlua)) {
146 chunk_appendf(buf, "%sCurrent executing Lua from a stream analyser -- ", pfx);
147 }
148 else if (task->process == hlua_process_task && (hlua = task->context)) {
149 chunk_appendf(buf, "%sCurrent executing a Lua task -- ", pfx);
150 }
151 else if (task->process == task_run_applet && (appctx = task->context) &&
152 (appctx->applet->fct == hlua_applet_tcp_fct && (hlua = appctx->ctx.hlua_apptcp.hlua))) {
153 chunk_appendf(buf, "%sCurrent executing a Lua TCP service -- ", pfx);
154 }
155 else if (task->process == task_run_applet && (appctx = task->context) &&
156 (appctx->applet->fct == hlua_applet_http_fct && (hlua = appctx->ctx.hlua_apphttp.hlua))) {
157 chunk_appendf(buf, "%sCurrent executing a Lua HTTP service -- ", pfx);
158 }
159
160 if (hlua) {
161 luaL_traceback(hlua->T, hlua->T, NULL, 0);
162 if (!append_prefixed_str(buf, lua_tostring(hlua->T, -1), pfx, '\n', 1))
163 b_putchr(buf, '\n');
164 }
165#endif
Willy Tarreau4e2b6462019-05-16 17:44:30 +0200166}
167
Willy Tarreau4e2b6462019-05-16 17:44:30 +0200168/* This function dumps all profiling settings. It returns 0 if the output
169 * buffer is full and it needs to be called again, otherwise non-zero.
170 */
171static int cli_io_handler_show_threads(struct appctx *appctx)
172{
173 struct stream_interface *si = appctx->owner;
174 int thr;
175
176 if (unlikely(si_ic(si)->flags & (CF_WRITE_ERROR|CF_SHUTW)))
177 return 1;
178
179 if (appctx->st0)
180 thr = appctx->st1;
181 else
182 thr = 0;
183
Willy Tarreau5cf64dd2019-05-17 10:36:08 +0200184 chunk_reset(&trash);
Willy Tarreauc7091d82019-05-17 10:08:49 +0200185 ha_thread_dump_all_to_trash();
Willy Tarreau5cf64dd2019-05-17 10:36:08 +0200186
187 if (ci_putchk(si_ic(si), &trash) == -1) {
188 /* failed, try again */
189 si_rx_room_blk(si);
190 appctx->st1 = thr;
191 return 0;
192 }
Willy Tarreau4e2b6462019-05-16 17:44:30 +0200193 return 1;
194}
195
Willy Tarreau56131ca2019-05-20 13:48:29 +0200196/* dumps a state of all threads into the trash and on fd #2, then aborts. */
197void ha_panic()
198{
199 chunk_reset(&trash);
Willy Tarreaua9f9fc92019-05-20 17:45:35 +0200200 chunk_appendf(&trash, "Thread %u is about to kill the process.\n", tid + 1);
Willy Tarreau56131ca2019-05-20 13:48:29 +0200201 ha_thread_dump_all_to_trash();
Tim Duesterhusdda11552019-06-12 20:47:30 +0200202 shut_your_big_mouth_gcc(write(2, trash.area, trash.data));
Willy Tarreau56131ca2019-05-20 13:48:29 +0200203 for (;;)
204 abort();
205}
206
Willy Tarreau6bdf3e92019-05-20 14:25:05 +0200207#if defined(DEBUG_DEV)
208/* parse a "debug dev exit" command. It always returns 1, though it should never return. */
209static int debug_parse_cli_exit(char **args, char *payload, struct appctx *appctx, void *private)
210{
211 int code = atoi(args[3]);
212
213 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
214 return 1;
215
216 exit(code);
217 return 1;
218}
219
220/* parse a "debug dev close" command. It always returns 1. */
221static int debug_parse_cli_close(char **args, char *payload, struct appctx *appctx, void *private)
222{
223 int fd;
224
225 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
226 return 1;
227
Willy Tarreau9d008692019-08-09 11:21:01 +0200228 if (!*args[3])
229 return cli_err(appctx, "Missing file descriptor number.\n");
Willy Tarreau6bdf3e92019-05-20 14:25:05 +0200230
231 fd = atoi(args[3]);
Willy Tarreau9d008692019-08-09 11:21:01 +0200232 if (fd < 0 || fd >= global.maxsock)
233 return cli_err(appctx, "File descriptor out of range.\n");
Willy Tarreau6bdf3e92019-05-20 14:25:05 +0200234
Willy Tarreau9d008692019-08-09 11:21:01 +0200235 if (!fdtab[fd].owner)
236 return cli_msg(appctx, LOG_INFO, "File descriptor was already closed.\n");
Willy Tarreau6bdf3e92019-05-20 14:25:05 +0200237
238 fd_delete(fd);
239 return 1;
Willy Tarreau6bdf3e92019-05-20 14:25:05 +0200240}
241
242/* parse a "debug dev delay" command. It always returns 1. */
243static int debug_parse_cli_delay(char **args, char *payload, struct appctx *appctx, void *private)
244{
245 int delay = atoi(args[3]);
246
247 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
248 return 1;
249
250 usleep((long)delay * 1000);
251 return 1;
252}
253
254/* parse a "debug dev log" command. It always returns 1. */
255static int debug_parse_cli_log(char **args, char *payload, struct appctx *appctx, void *private)
256{
257 int arg;
258
259 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
260 return 1;
261
262 chunk_reset(&trash);
263 for (arg = 3; *args[arg]; arg++) {
264 if (arg > 3)
265 chunk_strcat(&trash, " ");
266 chunk_strcat(&trash, args[arg]);
267 }
268
269 send_log(NULL, LOG_INFO, "%s\n", trash.area);
270 return 1;
271}
272
273/* parse a "debug dev loop" command. It always returns 1. */
274static int debug_parse_cli_loop(char **args, char *payload, struct appctx *appctx, void *private)
275{
276 struct timeval deadline, curr;
277 int loop = atoi(args[3]);
278
279 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
280 return 1;
281
282 gettimeofday(&curr, NULL);
283 tv_ms_add(&deadline, &curr, loop);
284
285 while (tv_ms_cmp(&curr, &deadline) < 0)
286 gettimeofday(&curr, NULL);
287
288 return 1;
289}
290
291/* parse a "debug dev panic" command. It always returns 1, though it should never return. */
292static int debug_parse_cli_panic(char **args, char *payload, struct appctx *appctx, void *private)
293{
294 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
295 return 1;
296
297 ha_panic();
298 return 1;
299}
300
301/* parse a "debug dev exec" command. It always returns 1. */
302static int debug_parse_cli_exec(char **args, char *payload, struct appctx *appctx, void *private)
303{
304 FILE *f;
305 int arg;
306
307 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
308 return 1;
309
310 chunk_reset(&trash);
311 for (arg = 3; *args[arg]; arg++) {
312 if (arg > 3)
313 chunk_strcat(&trash, " ");
314 chunk_strcat(&trash, args[arg]);
315 }
316
317 f = popen(trash.area, "re");
Willy Tarreau9d008692019-08-09 11:21:01 +0200318 if (!f)
319 return cli_err(appctx, "Failed to execute command.\n");
Willy Tarreau6bdf3e92019-05-20 14:25:05 +0200320
321 chunk_reset(&trash);
322 while (1) {
323 size_t ret = fread(trash.area + trash.data, 1, trash.size - 20 - trash.data, f);
324 if (!ret)
325 break;
326 trash.data += ret;
327 if (trash.data + 20 == trash.size) {
328 chunk_strcat(&trash, "\n[[[TRUNCATED]]]\n");
329 break;
330 }
331 }
332
333 fclose(f);
334 trash.area[trash.data] = 0;
Willy Tarreau9d008692019-08-09 11:21:01 +0200335 return cli_msg(appctx, LOG_INFO, trash.area);
Willy Tarreau6bdf3e92019-05-20 14:25:05 +0200336}
337
338/* parse a "debug dev hex" command. It always returns 1. */
339static int debug_parse_cli_hex(char **args, char *payload, struct appctx *appctx, void *private)
340{
341 unsigned long start, len;
342
343 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
344 return 1;
345
Willy Tarreau9d008692019-08-09 11:21:01 +0200346 if (!*args[3])
347 return cli_err(appctx, "Missing memory address to dump from.\n");
Willy Tarreau6bdf3e92019-05-20 14:25:05 +0200348
349 start = strtoul(args[3], NULL, 0);
Willy Tarreau9d008692019-08-09 11:21:01 +0200350 if (!start)
351 return cli_err(appctx, "Will not dump from NULL address.\n");
Willy Tarreau6bdf3e92019-05-20 14:25:05 +0200352
353 /* by default, dump ~128 till next block of 16 */
354 len = strtoul(args[4], NULL, 0);
355 if (!len)
356 len = ((start + 128) & -16) - start;
357
358 chunk_reset(&trash);
Willy Tarreau37101052019-05-20 16:48:20 +0200359 dump_hex(&trash, " ", (const void *)start, len, 1);
Willy Tarreau6bdf3e92019-05-20 14:25:05 +0200360 trash.area[trash.data] = 0;
Willy Tarreau9d008692019-08-09 11:21:01 +0200361 return cli_msg(appctx, LOG_INFO, trash.area);
Willy Tarreau6bdf3e92019-05-20 14:25:05 +0200362}
363
364/* parse a "debug dev tkill" command. It always returns 1. */
365static int debug_parse_cli_tkill(char **args, char *payload, struct appctx *appctx, void *private)
366{
367 int thr = 0;
368 int sig = SIGABRT;
369
370 if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
371 return 1;
372
373 if (*args[3])
374 thr = atoi(args[3]);
375
Willy Tarreau9d008692019-08-09 11:21:01 +0200376 if (thr < 0 || thr > global.nbthread)
377 return cli_err(appctx, "Thread number out of range (use 0 for current).\n");
Willy Tarreau6bdf3e92019-05-20 14:25:05 +0200378
379 if (*args[4])
380 sig = atoi(args[4]);
381
Willy Tarreau6bdf3e92019-05-20 14:25:05 +0200382 if (thr)
Willy Tarreaufade80d2019-05-22 08:46:59 +0200383 ha_tkill(thr - 1, sig);
Willy Tarreau6bdf3e92019-05-20 14:25:05 +0200384 else
Willy Tarreau6bdf3e92019-05-20 14:25:05 +0200385 raise(sig);
386 return 1;
387}
388
389#endif
390
Willy Tarreauc7091d82019-05-17 10:08:49 +0200391#ifndef USE_THREAD_DUMP
392
393/* This function dumps all threads' state to the trash. This version is the
394 * most basic one, which doesn't inspect other threads.
395 */
396void ha_thread_dump_all_to_trash()
397{
398 unsigned int thr;
399
400 for (thr = 0; thr < global.nbthread; thr++)
401 ha_thread_dump(&trash, thr, tid);
402}
403
404#else /* below USE_THREAD_DUMP is set */
405
Willy Tarreauddd85332019-05-22 06:28:54 +0200406/* The signal to trigger a debug dump on a thread is SIGURG. It has the benefit
407 * of not stopping gdb by default, so that issuing "show threads" in a process
408 * being debugged has no adverse effect.
409 */
410#define DEBUGSIG SIGURG
Willy Tarreauc7091d82019-05-17 10:08:49 +0200411
Willy Tarreauc7091d82019-05-17 10:08:49 +0200412/* ID of the thread requesting the dump */
413static unsigned int thread_dump_tid;
414
415/* points to the buffer where the dump functions should write. It must
416 * have already been initialized by the requester. Nothing is done if
417 * it's NULL.
418 */
419struct buffer *thread_dump_buffer = NULL;
420
421void ha_thread_dump_all_to_trash()
422{
Willy Tarreauc7091d82019-05-17 10:08:49 +0200423 unsigned long old;
424
425 while (1) {
426 old = 0;
427 if (HA_ATOMIC_CAS(&threads_to_dump, &old, all_threads_mask))
428 break;
429 ha_thread_relax();
430 }
431
432 thread_dump_buffer = &trash;
433 thread_dump_tid = tid;
Willy Tarreaufade80d2019-05-22 08:46:59 +0200434 ha_tkillall(DEBUGSIG);
Willy Tarreauc7091d82019-05-17 10:08:49 +0200435}
436
437/* handles DEBUGSIG to dump the state of the thread it's working on */
438void debug_handler(int sig, siginfo_t *si, void *arg)
439{
440 /* There are 4 phases in the dump process:
441 * 1- wait for our turn, i.e. when all lower bits are gone.
442 * 2- perform the action if our bit is set
443 * 3- remove our bit to let the next one go, unless we're
Willy Tarreauc0773622019-07-31 19:15:45 +0200444 * the last one and have to put them all as a signal
445 * 4- wait out bit to re-appear, then clear it and quit.
Willy Tarreauc7091d82019-05-17 10:08:49 +0200446 */
447
448 /* wait for all previous threads to finish first */
449 while (threads_to_dump & (tid_bit - 1))
450 ha_thread_relax();
451
452 /* dump if needed */
453 if (threads_to_dump & tid_bit) {
454 if (thread_dump_buffer)
455 ha_thread_dump(thread_dump_buffer, tid, thread_dump_tid);
456 if ((threads_to_dump & all_threads_mask) == tid_bit) {
457 /* last one */
Willy Tarreauc0773622019-07-31 19:15:45 +0200458 HA_ATOMIC_STORE(&threads_to_dump, all_threads_mask);
Willy Tarreauc7091d82019-05-17 10:08:49 +0200459 thread_dump_buffer = NULL;
460 }
461 else
462 HA_ATOMIC_AND(&threads_to_dump, ~tid_bit);
463 }
464
465 /* now wait for all others to finish dumping. The last one will set all
Willy Tarreauc0773622019-07-31 19:15:45 +0200466 * bits again to broadcast the leaving condition so we'll see ourselves
467 * present again. This way the threads_to_dump variable never passes to
468 * zero until all visitors have stopped waiting.
Willy Tarreauc7091d82019-05-17 10:08:49 +0200469 */
Willy Tarreauc0773622019-07-31 19:15:45 +0200470 while (!(threads_to_dump & tid_bit))
471 ha_thread_relax();
472 HA_ATOMIC_AND(&threads_to_dump, ~tid_bit);
Willy Tarreaue6a02fa2019-05-22 07:06:44 +0200473
474 /* mark the current thread as stuck to detect it upon next invocation
475 * if it didn't move.
476 */
477 if (!((threads_harmless_mask|sleeping_thread_mask) & tid_bit))
478 ti->flags |= TI_FL_STUCK;
Willy Tarreauc7091d82019-05-17 10:08:49 +0200479}
480
481static int init_debug_per_thread()
482{
483 sigset_t set;
484
485 /* unblock the DEBUGSIG signal we intend to use */
486 sigemptyset(&set);
487 sigaddset(&set, DEBUGSIG);
488 ha_sigmask(SIG_UNBLOCK, &set, NULL);
489 return 1;
490}
491
492static int init_debug()
493{
494 struct sigaction sa;
495
496 sa.sa_handler = NULL;
497 sa.sa_sigaction = debug_handler;
498 sigemptyset(&sa.sa_mask);
499 sa.sa_flags = SA_SIGINFO;
500 sigaction(DEBUGSIG, &sa, NULL);
501 return 0;
502}
503
504REGISTER_POST_CHECK(init_debug);
505REGISTER_PER_THREAD_INIT(init_debug_per_thread);
506
507#endif /* USE_THREAD_DUMP */
508
Willy Tarreau4e2b6462019-05-16 17:44:30 +0200509/* register cli keywords */
510static struct cli_kw_list cli_kws = {{ },{
Willy Tarreau6bdf3e92019-05-20 14:25:05 +0200511#if defined(DEBUG_DEV)
512 {{ "debug", "dev", "close", NULL }, "debug dev close <fd> : close this file descriptor", debug_parse_cli_close, NULL },
513 {{ "debug", "dev", "delay", NULL }, "debug dev delay [ms] : sleep this long", debug_parse_cli_delay, NULL },
514 {{ "debug", "dev", "exec", NULL }, "debug dev exec [cmd] ... : show this command's output", debug_parse_cli_exec, NULL },
515 {{ "debug", "dev", "exit", NULL }, "debug dev exit [code] : immediately exit the process", debug_parse_cli_exit, NULL },
516 {{ "debug", "dev", "hex", NULL }, "debug dev hex <addr> [len]: dump a memory area", debug_parse_cli_hex, NULL },
517 {{ "debug", "dev", "log", NULL }, "debug dev log [msg] ... : send this msg to global logs", debug_parse_cli_log, NULL },
518 {{ "debug", "dev", "loop", NULL }, "debug dev loop [ms] : loop this long", debug_parse_cli_loop, NULL },
519 {{ "debug", "dev", "panic", NULL }, "debug dev panic : immediately trigger a panic", debug_parse_cli_panic, NULL },
520 {{ "debug", "dev", "tkill", NULL }, "debug dev tkill [thr] [sig] : send signal to thread", debug_parse_cli_tkill, NULL },
521#endif
Willy Tarreau4e2b6462019-05-16 17:44:30 +0200522 { { "show", "threads", NULL }, "show threads : show some threads debugging information", NULL, cli_io_handler_show_threads, NULL },
523 {{},}
524}};
525
526INITCALL1(STG_REGISTER, cli_register_kw, &cli_kws);