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Manpage: cleanup layout of enable-event
[lttng-tools.git] / src / bin / lttng / commands / enable_events.c
CommitLineData
f3ed775e
DG		 1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
d14d33bf
AM		 4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2 only,
6 * as published by the Free Software Foundation.
f3ed775e
DG		 7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
d14d33bf
AM		 13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
f3ed775e
DG		 16 */
17
18#define _GNU_SOURCE
19#include <popt.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23#include <sys/stat.h>
24#include <sys/types.h>
25#include <unistd.h>
5a0de755 26#include <inttypes.h>
8f0d098b 27#include <ctype.h>
f3ed775e 28
c399183f 29#include "../command.h"
42224349 30#include <src/common/sessiond-comm/sessiond-comm.h>
f3ed775e
DG		 31
32static char *opt_event_list;
33static int opt_event_type;
0cda4f28
MD		 34static const char *opt_loglevel;
35static int opt_loglevel_type;
6181537c 36static int opt_kernel;
5440dc42 37static char *opt_session_name;
f3ed775e
DG		 38static int opt_userspace;
39static int opt_enable_all;
cf0e5467 40static char *opt_probe;
8f0d098b
MD		 41static char *opt_function;
42static char *opt_function_entry_symbol;
f3ed775e 43static char *opt_channel_name;
53a80697 44static char *opt_filter;
d78d6610
DG		 45#if 0
46/* Not implemented yet */
47static char *opt_cmd_name;
48static pid_t opt_pid;
49#endif
f3ed775e
DG		 50
51enum {
52 OPT_HELP = 1,
f3ed775e 53 OPT_TRACEPOINT,
cf0e5467 54 OPT_PROBE,
f3ed775e 55 OPT_FUNCTION,
8f0d098b 56 OPT_FUNCTION_ENTRY,
a54bd42d 57 OPT_SYSCALL,
eeac7d46 58 OPT_USERSPACE,
0cda4f28
MD		 59 OPT_LOGLEVEL,
60 OPT_LOGLEVEL_ONLY,
679b4943 61 OPT_LIST_OPTIONS,
53a80697 62 OPT_FILTER,
f3ed775e
DG		 63};
64
cd80958d
DG		 65static struct lttng_handle *handle;
66
f3ed775e
DG		 67static struct poptOption long_options[] = {
68 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
69 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42 70 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
e14f64a8 71 {"all", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
f3ed775e
DG		 72 {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
73 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
d78d6610 74 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
f3ed775e 75 {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
7ebae521 76 {"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
40e9d5d3 77 {"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
b213d387
MD		 78#if 0
79 /*
80 * Currently removed from lttng kernel tracer. Removed from
81 * lttng UI to discourage its use.
82 */
40e9d5d3 83 {"function:entry", 0, POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0},
b213d387 84#endif
7ebae521 85 {"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
0cda4f28
MD		 86 {"loglevel", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL, 0, 0},
87 {"loglevel-only", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL_ONLY, 0, 0},
679b4943 88 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
53a80697 89 {"filter", 'f', POPT_ARG_STRING, &opt_filter, OPT_FILTER, 0, 0},
f3ed775e
DG		 90 {0, 0, 0, 0, 0, 0, 0}
91};
92
93/*
94 * usage
95 */
96static void usage(FILE *ofp)
97{
32a6298d 98 fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [-k|-u] [OPTIONS] \n");
f3ed775e 99 fprintf(ofp, "\n");
32a6298d 100 fprintf(ofp, "Options:\n");
f3ed775e 101 fprintf(ofp, " -h, --help Show this help\n");
679b4943 102 fprintf(ofp, " --list-options Simple listing of options\n");
32a6298d
DG		 103 fprintf(ofp, " -s, --session NAME Apply to session name\n");
104 fprintf(ofp, " -c, --channel NAME Apply to this channel\n");
e08bff8d 105 fprintf(ofp, " -a, --all Enable all tracepoints and syscalls\n");
f3ed775e 106 fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
27221701 107 fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
f3ed775e
DG		 108 fprintf(ofp, "\n");
109 fprintf(ofp, "Event options:\n");
110 fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
be49af1e
MD		 111 fprintf(ofp, " - userspace tracer supports wildcards at end of string.\n");
112 fprintf(ofp, " Don't forget to quote to deal with bash expansion.\n");
113 fprintf(ofp, " e.g.:\n");
114 fprintf(ofp, " \"*\"\n");
115 fprintf(ofp, " \"app_component:na*\"\n");
6a240cd9 116 fprintf(ofp, " --probe (addr | symbol | symbol+offset)\n");
cf0e5467
MD		 117 fprintf(ofp, " Dynamic probe.\n");
118 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
119 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
6a240cd9 120 fprintf(ofp, " --function (addr | symbol | symbol+offset)\n");
8f0d098b
MD		 121 fprintf(ofp, " Dynamic function entry/return probe.\n");
122 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
123 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
b213d387 124#if 0
8f0d098b
MD		 125 fprintf(ofp, " --function:entry symbol\n");
126 fprintf(ofp, " Function tracer event\n");
b213d387 127#endif
a54bd42d 128 fprintf(ofp, " --syscall System call event\n");
f3ed775e 129 fprintf(ofp, "\n");
300b8fd5
MD		 130 fprintf(ofp, " --loglevel name\n");
131 fprintf(ofp, " Tracepoint loglevel range from 0 to loglevel\n");
132 fprintf(ofp, " --loglevel-only name\n");
133 fprintf(ofp, " Tracepoint loglevel (only this loglevel)\n");
134 fprintf(ofp, "\n");
0c8477c8
MD		 135 fprintf(ofp, " The loglevel or loglevel-only options should be\n");
136 fprintf(ofp, " combined with a tracepoint name or tracepoint\n");
137 fprintf(ofp, " wildcard.\n");
138 fprintf(ofp, " Available loglevels:\n");
139 fprintf(ofp, " (higher value is more verbose)\n");
46839cc2
MD		 140 fprintf(ofp, " TRACE_EMERG = 0\n");
141 fprintf(ofp, " TRACE_ALERT = 1\n");
142 fprintf(ofp, " TRACE_CRIT = 2\n");
143 fprintf(ofp, " TRACE_ERR = 3\n");
144 fprintf(ofp, " TRACE_WARNING = 4\n");
145 fprintf(ofp, " TRACE_NOTICE = 5\n");
146 fprintf(ofp, " TRACE_INFO = 6\n");
147 fprintf(ofp, " TRACE_DEBUG_SYSTEM = 7\n");
148 fprintf(ofp, " TRACE_DEBUG_PROGRAM = 8\n");
149 fprintf(ofp, " TRACE_DEBUG_PROCESS = 9\n");
150 fprintf(ofp, " TRACE_DEBUG_MODULE = 10\n");
151 fprintf(ofp, " TRACE_DEBUG_UNIT = 11\n");
152 fprintf(ofp, " TRACE_DEBUG_FUNCTION = 12\n");
153 fprintf(ofp, " TRACE_DEBUG_LINE = 13\n");
154 fprintf(ofp, " TRACE_DEBUG = 14\n");
155 fprintf(ofp, " (shortcuts such as \"system\" are allowed)\n");
53a80697 156 fprintf(ofp, " --filter \'expression\'\n");
ee8ccafa
MD		 157 fprintf(ofp, " Filter expression on event fields and context.\n");
158 fprintf(ofp, " Event recording depends on evaluation.\n");
919e300c
MD		 159 fprintf(ofp, " Only specify on first activation of\n");
160 fprintf(ofp, " a given event within a session.\n");
161 fprintf(ofp, " Filter only allowed when enabling\n");
162 fprintf(ofp, " events within a session before tracing\n");
9bd578f5
MD		 163 fprintf(ofp, " is started. If the filter fails to link\n");
164 fprintf(ofp, " with the event within the traced domain,\n");
165 fprintf(ofp, " the event will be discarded. Currently,\n");
166 fprintf(ofp, " filter is only implemented for the user-space\n");
167 fprintf(ofp, " tracer.\n");
168 fprintf(ofp, " Expression examples:.\n");
169 fprintf(ofp, " \n");
170 fprintf(ofp, " 'intfield > 500 && intfield < 503'\n");
6a240cd9 171 fprintf(ofp, " '(strfield == \"test\" || intfield != 10) && intfield > 33'\n");
9bd578f5
MD		 172 fprintf(ofp, " 'doublefield > 1.1 && intfield < 5.3'\n");
173 fprintf(ofp, " \n");
174 fprintf(ofp, " Wildcards are allowed at the end of strings:\n");
175 fprintf(ofp, " 'seqfield1 == \"te*\"'\n");
176 fprintf(ofp, " In string literals, the escape character is '\\'.\n");
177 fprintf(ofp, " Use '\\*' for the '*' character, and '\\\\' for\n");
ee8ccafa
MD		 178 fprintf(ofp, " the '\\' character. Wildcard match any sequence of,\n");
179 fprintf(ofp, " characters including an empty sub-string (match 0 or\n");
180 fprintf(ofp, " more characters).\n");
181 fprintf(ofp, "\n");
182 fprintf(ofp, " Context information can be used for filtering. The\n");
183 fprintf(ofp, " examples below show usage of context filtering on\n");
184 fprintf(ofp, " process name (with a wildcard), process ID range, and\n");
185 fprintf(ofp, " unique thread ID for filtering. The process and\n");
186 fprintf(ofp, " thread ID of running applications can be found under\n");
187 fprintf(ofp, " columns \"PID\" and \"LWP\" of the \"ps -eLf\" command.\n");
188 fprintf(ofp, "\n");
189 fprintf(ofp, " '$ctx.procname == \"demo*\"'\n");
190 fprintf(ofp, " '$ctx.vpid >= 4433 && $ctx.vpid < 4455'\n");
191 fprintf(ofp, " '$ctx.vtid == 1234'\n");
300b8fd5 192 fprintf(ofp, "\n");
f3ed775e
DG		 193}
194
0d63dd19 195/*
6181537c 196 * Parse probe options.
0d63dd19 197 */
cf0e5467 198static int parse_probe_opts(struct lttng_event *ev, char *opt)
0d63dd19
DG		 199{
200 int ret;
8ff0bbd0 201 char s_hex[19];
0d63dd19
DG		 202 char name[LTTNG_SYMBOL_NAME_LEN];
203
204 if (opt == NULL) {
205 ret = -1;
8f0d098b 206 goto end;
0d63dd19
DG		 207 }
208
209 /* Check for symbol+offset */
8ff0bbd0 210 ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
0d63dd19 211 if (ret == 2) {
7d29a247 212 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0 213 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
cf0e5467 214 DBG("probe symbol %s", ev->attr.probe.symbol_name);
9d035200 215 if (*s_hex == '\0') {
8ff0bbd0 216 ERR("Invalid probe offset %s", s_hex);
0d63dd19 217 ret = -1;
8f0d098b 218 goto end;
0d63dd19 219 }
8ff0bbd0 220 ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
cf0e5467 221 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
3000dc78 222 ev->attr.probe.addr = 0;
8f0d098b
MD		 223 goto end;
224 }
225
226 /* Check for symbol */
227 if (isalpha(name[0])) {
228 ret = sscanf(opt, "%s", name);
229 if (ret == 1) {
230 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0 231 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
8f0d098b
MD		 232 DBG("probe symbol %s", ev->attr.probe.symbol_name);
233 ev->attr.probe.offset = 0;
234 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
235 ev->attr.probe.addr = 0;
236 goto end;
237 }
0d63dd19
DG		 238 }
239
240 /* Check for address */
8ff0bbd0 241 ret = sscanf(opt, "%s", s_hex);
0d63dd19 242 if (ret > 0) {
9d035200 243 if (*s_hex == '\0') {
8ff0bbd0 244 ERR("Invalid probe address %s", s_hex);
0d63dd19 245 ret = -1;
8f0d098b 246 goto end;
0d63dd19 247 }
8ff0bbd0 248 ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
cf0e5467 249 DBG("probe addr %" PRIu64, ev->attr.probe.addr);
3000dc78
DG		 250 ev->attr.probe.offset = 0;
251 memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
8f0d098b 252 goto end;
0d63dd19
DG		 253 }
254
255 /* No match */
256 ret = -1;
257
8f0d098b 258end:
0d63dd19
DG		 259 return ret;
260}
261
8005f29a 262/*
0c8477c8 263 * Maps loglevel from string to value
8005f29a
MD		 264 */
265static
46839cc2 266int loglevel_str_to_value(const char *inputstr)
8005f29a 267{
46839cc2
MD		 268 int i = 0;
269 char str[LTTNG_SYMBOL_NAME_LEN];
270
e051e07c
DG		 271 /*
272 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
273 * added at the end of the loop so a the upper bound we avoid the overflow.
274 */
275 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
46839cc2
MD		 276 str[i] = toupper(inputstr[i]);
277 i++;
278 }
279 str[i] = '\0';
280 if (!strcmp(str, "TRACE_EMERG") || !strcmp(str, "EMERG")) {
281 return LTTNG_LOGLEVEL_EMERG;
282 } else if (!strcmp(str, "TRACE_ALERT") || !strcmp(str, "ALERT")) {
283 return LTTNG_LOGLEVEL_ALERT;
284 } else if (!strcmp(str, "TRACE_CRIT") || !strcmp(str, "CRIT")) {
285 return LTTNG_LOGLEVEL_CRIT;
286 } else if (!strcmp(str, "TRACE_ERR") || !strcmp(str, "ERR")) {
287 return LTTNG_LOGLEVEL_ERR;
288 } else if (!strcmp(str, "TRACE_WARNING") || !strcmp(str, "WARNING")) {
289 return LTTNG_LOGLEVEL_WARNING;
290 } else if (!strcmp(str, "TRACE_NOTICE") || !strcmp(str, "NOTICE")) {
291 return LTTNG_LOGLEVEL_NOTICE;
292 } else if (!strcmp(str, "TRACE_INFO") || !strcmp(str, "INFO")) {
293 return LTTNG_LOGLEVEL_INFO;
294 } else if (!strcmp(str, "TRACE_DEBUG_SYSTEM") || !strcmp(str, "DEBUG_SYSTEM") || !strcmp(str, "SYSTEM")) {
295 return LTTNG_LOGLEVEL_DEBUG_SYSTEM;
296 } else if (!strcmp(str, "TRACE_DEBUG_PROGRAM") || !strcmp(str, "DEBUG_PROGRAM") || !strcmp(str, "PROGRAM")) {
297 return LTTNG_LOGLEVEL_DEBUG_PROGRAM;
298 } else if (!strcmp(str, "TRACE_DEBUG_PROCESS") || !strcmp(str, "DEBUG_PROCESS") || !strcmp(str, "PROCESS")) {
299 return LTTNG_LOGLEVEL_DEBUG_PROCESS;
300 } else if (!strcmp(str, "TRACE_DEBUG_MODULE") || !strcmp(str, "DEBUG_MODULE") || !strcmp(str, "MODULE")) {
301 return LTTNG_LOGLEVEL_DEBUG_MODULE;
302 } else if (!strcmp(str, "TRACE_DEBUG_UNIT") || !strcmp(str, "DEBUG_UNIT") || !strcmp(str, "UNIT")) {
303 return LTTNG_LOGLEVEL_DEBUG_UNIT;
304 } else if (!strcmp(str, "TRACE_DEBUG_FUNCTION") || !strcmp(str, "DEBUG_FUNCTION") || !strcmp(str, "FUNCTION")) {
305 return LTTNG_LOGLEVEL_DEBUG_FUNCTION;
306 } else if (!strcmp(str, "TRACE_DEBUG_LINE") || !strcmp(str, "DEBUG_LINE") || !strcmp(str, "LINE")) {
307 return LTTNG_LOGLEVEL_DEBUG_LINE;
308 } else if (!strcmp(str, "TRACE_DEBUG") || !strcmp(str, "DEBUG")) {
309 return LTTNG_LOGLEVEL_DEBUG;
8005f29a
MD		 310 } else {
311 return -1;
312 }
313}
314
f3ed775e 315/*
6181537c 316 * Enabling event using the lttng API.
f3ed775e 317 */
cd80958d 318static int enable_events(char *session_name)
f3ed775e 319{
ae856491 320 int err, ret = CMD_SUCCESS, warn = 0;
b73d0b29 321 char *event_name, *channel_name = NULL;
f3ed775e 322 struct lttng_event ev;
7d29a247 323 struct lttng_domain dom;
f3ed775e 324
441c16a7
MD		 325 memset(&ev, 0, sizeof(ev));
326 memset(&dom, 0, sizeof(dom));
327
53a80697
MD		 328 if (opt_kernel) {
329 if (opt_filter) {
330 ERR("Filter not implement for kernel tracing yet");
331 ret = CMD_ERROR;
332 goto error;
333 }
334 }
335
7d29a247
DG		 336 /* Create lttng domain */
337 if (opt_kernel) {
338 dom.type = LTTNG_DOMAIN_KERNEL;
7972aab2 339 dom.buf_type = LTTNG_BUFFER_GLOBAL;
d78d6610 340 } else if (opt_userspace) {
2bdd86d4 341 dom.type = LTTNG_DOMAIN_UST;
7972aab2 342 /* Default. */
8692d4e5 343 dom.buf_type = LTTNG_BUFFER_PER_UID;
6181537c 344 } else {
e14f64a8 345 ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
d16c1a4c 346 ret = CMD_ERROR;
6181537c 347 goto error;
2bdd86d4 348 }
7d29a247 349
ae856491
DG		 350 if (opt_channel_name == NULL) {
351 err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME);
352 if (err < 0) {
353 ret = CMD_FATAL;
354 goto error;
355 }
356 } else {
357 channel_name = opt_channel_name;
358 }
359
cd80958d
DG		 360 handle = lttng_create_handle(session_name, &dom);
361 if (handle == NULL) {
362 ret = -1;
363 goto error;
364 }
1aef21b6 365
cd80958d 366 if (opt_enable_all) {
8c9ae521 367 /* Default setup for enable all */
75e8c5ab
MD		 368 if (opt_kernel) {
369 ev.type = opt_event_type;
370 ev.name[0] = '\0';
300b8fd5
MD		 371 /* kernel loglevels not implemented */
372 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
75e8c5ab
MD		 373 } else {
374 ev.type = LTTNG_EVENT_TRACEPOINT;
375 strcpy(ev.name, "*");
300b8fd5
MD		 376 ev.loglevel_type = opt_loglevel_type;
377 if (opt_loglevel) {
378 ev.loglevel = loglevel_str_to_value(opt_loglevel);
379 if (ev.loglevel == -1) {
380 ERR("Unknown loglevel %s", opt_loglevel);
2f70b271 381 ret = -LTTNG_ERR_INVALID;
300b8fd5
MD		 382 goto error;
383 }
22e25b71
MD		 384 } else {
385 ev.loglevel = -1;
300b8fd5 386 }
75e8c5ab 387 }
8c9ae521 388
025faf73
DG		 389 if (!opt_filter) {
390 ret = lttng_enable_event(handle, &ev, channel_name);
391 if (ret < 0) {
392 switch (-ret) {
393 case LTTNG_ERR_KERN_EVENT_EXIST:
394 WARN("Kernel events already enabled (channel %s, session %s)",
395 channel_name, session_name);
396 break;
397 default:
398 ERR("Events: %s (channel %s, session %s)",
399 lttng_strerror(ret), channel_name, session_name);
400 break;
401 }
402 goto end;
42224349 403 }
8c9ae521 404
025faf73
DG		 405 switch (opt_event_type) {
406 case LTTNG_EVENT_TRACEPOINT:
407 if (opt_loglevel) {
408 MSG("All %s tracepoints are enabled in channel %s for loglevel %s",
409 opt_kernel ? "kernel" : "UST", channel_name,
410 opt_loglevel);
411 } else {
412 MSG("All %s tracepoints are enabled in channel %s",
413 opt_kernel ? "kernel" : "UST", channel_name);
57064ada 414
025faf73
DG		 415 }
416 break;
417 case LTTNG_EVENT_SYSCALL:
418 if (opt_kernel) {
419 MSG("All kernel system calls are enabled in channel %s",
420 channel_name);
421 }
422 break;
423 case LTTNG_EVENT_ALL:
424 if (opt_loglevel) {
425 MSG("All %s events are enabled in channel %s for loglevel %s",
426 opt_kernel ? "kernel" : "UST", channel_name,
427 opt_loglevel);
428 } else {
429 MSG("All %s events are enabled in channel %s",
430 opt_kernel ? "kernel" : "UST", channel_name);
431 }
432 break;
433 default:
434 /*
435 * We should not be here since lttng_enable_event should have
436 * failed on the event type.
437 */
438 goto error;
57064ada 439 }
f3ed775e 440 }
025faf73
DG		 441 if (opt_filter) {
442 ret = lttng_enable_event_with_filter(handle, &ev, channel_name,
16363652
DG		 443 opt_filter);
444 if (ret < 0) {
445 switch (-ret) {
446 case LTTNG_ERR_FILTER_EXIST:
ff7ef7b8 447 WARN("Filter on events is already enabled"
16363652
DG		 448 " (channel %s, session %s)",
449 channel_name, session_name);
450 break;
ff7ef7b8
DG		 451 case LTTNG_ERR_FILTER_INVAL:
452 case LTTNG_ERR_FILTER_NOMEM:
16363652 453 default:
85711340 454 ERR("%s", lttng_strerror(ret));
16363652
DG		 455 break;
456 }
457 goto error;
458 } else {
459 MSG("Filter '%s' successfully set", opt_filter);
460 }
461 }
8c9ae521 462 goto end;
f3ed775e
DG		 463 }
464
465 /* Strip event list */
466 event_name = strtok(opt_event_list, ",");
467 while (event_name != NULL) {
6181537c
DG		 468 /* Copy name and type of the event */
469 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
470 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
471 ev.type = opt_event_type;
472
f3ed775e
DG		 473 /* Kernel tracer action */
474 if (opt_kernel) {
475 DBG("Enabling kernel event %s for channel %s",
476 event_name, channel_name);
f3ed775e
DG		 477
478 switch (opt_event_type) {
7a3d1328
MD		 479 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
480 ev.type = LTTNG_EVENT_TRACEPOINT;
481 /* Fall-through */
e6ddca71 482 case LTTNG_EVENT_TRACEPOINT:
f3ed775e 483 break;
7d29a247 484 case LTTNG_EVENT_PROBE:
cf0e5467 485 ret = parse_probe_opts(&ev, opt_probe);
0d63dd19 486 if (ret < 0) {
cf0e5467 487 ERR("Unable to parse probe options");
0d63dd19
DG		 488 ret = 0;
489 goto error;
490 }
f3ed775e
DG		 491 break;
492 case LTTNG_EVENT_FUNCTION:
8f0d098b
MD		 493 ret = parse_probe_opts(&ev, opt_function);
494 if (ret < 0) {
495 ERR("Unable to parse function probe options");
496 ret = 0;
497 goto error;
498 }
499 break;
500 case LTTNG_EVENT_FUNCTION_ENTRY:
6181537c
DG		 501 strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
502 LTTNG_SYMBOL_NAME_LEN);
99497cd0 503 ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e 504 break;
a54bd42d 505 case LTTNG_EVENT_SYSCALL:
6181537c
DG		 506 MSG("per-syscall selection not supported yet. Use \"-a\" "
507 "for all syscalls.");
f3ed775e 508 default:
1ab1ea0b 509 ret = CMD_UNDEFINED;
f3ed775e
DG		 510 goto error;
511 }
0cda4f28 512
ed7f4083 513 if (opt_loglevel) {
0cda4f28 514 MSG("Kernel loglevels are not supported.");
4ce78777 515 ret = CMD_UNSUPPORTED;
0cda4f28
MD		 516 goto error;
517 }
518
519 /* kernel loglevels not implemented */
8005f29a 520 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
f3ed775e 521 } else if (opt_userspace) { /* User-space tracer action */
d78d6610 522#if 0
e14f64a8
DG		 523 if (opt_cmd_name != NULL || opt_pid) {
524 MSG("Only supporting tracing all UST processes (-u) for now.");
1ab1ea0b 525 ret = CMD_UNDEFINED;
2bdd86d4
MD		 526 goto error;
527 }
d78d6610 528#endif
6181537c 529
300b8fd5
MD		 530 DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
531 channel_name, opt_loglevel ? : "<all>");
2bdd86d4
MD		 532
533 switch (opt_event_type) {
534 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
2bdd86d4
MD		 535 /* Fall-through */
536 case LTTNG_EVENT_TRACEPOINT:
e4baff1e
MD		 537 /* Copy name and type of the event */
538 ev.type = LTTNG_EVENT_TRACEPOINT;
539 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
540 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
2bdd86d4
MD		 541 break;
542 case LTTNG_EVENT_PROBE:
543 case LTTNG_EVENT_FUNCTION:
544 case LTTNG_EVENT_FUNCTION_ENTRY:
545 case LTTNG_EVENT_SYSCALL:
546 default:
cc62c0c0 547 ERR("Event type not available for user-space tracing");
4ce78777 548 ret = CMD_UNSUPPORTED;
2bdd86d4
MD		 549 goto error;
550 }
0cda4f28
MD		 551
552 ev.loglevel_type = opt_loglevel_type;
ed7f4083 553 if (opt_loglevel) {
8005f29a
MD		 554 ev.loglevel = loglevel_str_to_value(opt_loglevel);
555 if (ev.loglevel == -1) {
556 ERR("Unknown loglevel %s", opt_loglevel);
2f70b271 557 ret = -LTTNG_ERR_INVALID;
8005f29a
MD		 558 goto error;
559 }
22e25b71
MD		 560 } else {
561 ev.loglevel = -1;
ed7f4083 562 }
f3ed775e 563 } else {
e14f64a8 564 ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
300b8fd5 565 ret = CMD_ERROR;
f3ed775e
DG		 566 goto error;
567 }
568
025faf73
DG		 569 if (!opt_filter) {
570 ret = lttng_enable_event(handle, &ev, channel_name);
571 if (ret < 0) {
572 /* Turn ret to positive value to handle the positive error code */
573 switch (-ret) {
574 case LTTNG_ERR_KERN_EVENT_EXIST:
575 WARN("Kernel event %s already enabled (channel %s, session %s)",
576 event_name, channel_name, session_name);
577 break;
578 default:
579 ERR("Event %s: %s (channel %s, session %s)", event_name,
580 lttng_strerror(ret), channel_name, session_name);
581 break;
582 }
583 warn = 1;
584 } else {
585 MSG("%s event %s created in channel %s",
586 opt_kernel ? "kernel": "UST", event_name, channel_name);
42224349 587 }
6181537c 588 }
025faf73
DG		 589
590 if (opt_filter) {
591 ret = lttng_enable_event_with_filter(handle, &ev, channel_name,
16363652 592 opt_filter);
53a80697 593 if (ret < 0) {
7671f53c
CB		 594 switch (-ret) {
595 case LTTNG_ERR_FILTER_EXIST:
ff7ef7b8 596 WARN("Filter on event %s is already enabled"
7671f53c
CB		 597 " (channel %s, session %s)",
598 event_name, channel_name, session_name);
599 break;
ff7ef7b8
DG		 600 case LTTNG_ERR_FILTER_INVAL:
601 case LTTNG_ERR_FILTER_NOMEM:
602 ERR("%s", lttng_strerror(ret));
7671f53c 603 default:
16363652
DG		 604 ERR("Setting filter for event %s: '%s'", ev.name,
605 opt_filter);
7671f53c
CB		 606 break;
607 }
53a80697 608 goto error;
16363652
DG		 609 } else {
610 MSG("Filter '%s' successfully set", opt_filter);
53a80697
MD		 611 }
612 }
6181537c 613
f3ed775e
DG		 614 /* Next event */
615 event_name = strtok(NULL, ",");
616 }
617
8c9ae521 618end:
f3ed775e 619error:
ae856491
DG		 620 if (warn) {
621 ret = CMD_WARNING;
622 }
b73d0b29
MD		 623 if (opt_channel_name == NULL) {
624 free(channel_name);
625 }
cd80958d
DG		 626 lttng_destroy_handle(handle);
627
f3ed775e
DG		 628 return ret;
629}
630
631/*
6181537c 632 * Add event to trace session
f3ed775e
DG		 633 */
634int cmd_enable_events(int argc, const char **argv)
635{
ca1c3607 636 int opt, ret = CMD_SUCCESS;
f3ed775e 637 static poptContext pc;
cd80958d 638 char *session_name = NULL;
de044b7a 639 int event_type = -1;
f3ed775e
DG		 640
641 pc = poptGetContext(NULL, argc, argv, long_options, 0);
642 poptReadDefaultConfig(pc, 0);
643
644 /* Default event type */
7a3d1328 645 opt_event_type = LTTNG_EVENT_ALL;
f3ed775e
DG		 646
647 while ((opt = poptGetNextOpt(pc)) != -1) {
648 switch (opt) {
649 case OPT_HELP:
ca1c3607 650 usage(stdout);
f3ed775e 651 goto end;
f3ed775e 652 case OPT_TRACEPOINT:
e6ddca71 653 opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e 654 break;
cf0e5467 655 case OPT_PROBE:
7d29a247 656 opt_event_type = LTTNG_EVENT_PROBE;
f3ed775e
DG		 657 break;
658 case OPT_FUNCTION:
659 opt_event_type = LTTNG_EVENT_FUNCTION;
8f0d098b
MD		 660 break;
661 case OPT_FUNCTION_ENTRY:
662 opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
f3ed775e 663 break;
a54bd42d
MD		 664 case OPT_SYSCALL:
665 opt_event_type = LTTNG_EVENT_SYSCALL;
0133c199 666 break;
eeac7d46
MD		 667 case OPT_USERSPACE:
668 opt_userspace = 1;
eeac7d46 669 break;
0cda4f28 670 case OPT_LOGLEVEL:
8005f29a 671 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
0cda4f28
MD		 672 opt_loglevel = poptGetOptArg(pc);
673 break;
674 case OPT_LOGLEVEL_ONLY:
8005f29a 675 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
0cda4f28 676 opt_loglevel = poptGetOptArg(pc);
13dce3b7 677 break;
679b4943
SM		 678 case OPT_LIST_OPTIONS:
679 list_cmd_options(stdout, long_options);
679b4943 680 goto end;
53a80697
MD		 681 case OPT_FILTER:
682 break;
f3ed775e
DG		 683 default:
684 usage(stderr);
685 ret = CMD_UNDEFINED;
686 goto end;
687 }
de044b7a
DG		 688
689 /* Validate event type. Multiple event type are not supported. */
690 if (event_type == -1) {
691 event_type = opt_event_type;
692 } else {
693 if (event_type != opt_event_type) {
694 ERR("Multiple event type not supported.");
695 ret = CMD_ERROR;
696 goto end;
697 }
698 }
f3ed775e
DG		 699 }
700
701 opt_event_list = (char*) poptGetArg(pc);
702 if (opt_event_list == NULL && opt_enable_all == 0) {
703 ERR("Missing event name(s).\n");
704 usage(stderr);
ca1c3607 705 ret = CMD_ERROR;
f3ed775e
DG		 706 goto end;
707 }
708
cd80958d
DG		 709 if (!opt_session_name) {
710 session_name = get_session_name();
711 if (session_name == NULL) {
ca1c3607 712 ret = CMD_ERROR;
cd80958d
DG		 713 goto end;
714 }
715 } else {
716 session_name = opt_session_name;
717 }
718
719 ret = enable_events(session_name);
f3ed775e
DG		 720
721end:
cd80958d
DG		 722 if (opt_session_name == NULL) {
723 free(session_name);
724 }
725
ca1c3607 726 poptFreeContext(pc);
f3ed775e
DG		 727 return ret;
728}
LTTng 2.0 tools and control repository
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