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Add a function to check for legal exclusions
[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 38static int opt_userspace;
b9dfb167 39static int opt_jul;
f3ed775e 40static int opt_enable_all;
cf0e5467 41static char *opt_probe;
8f0d098b
MD		 42static char *opt_function;
43static char *opt_function_entry_symbol;
f3ed775e 44static char *opt_channel_name;
53a80697 45static char *opt_filter;
fac3366c 46static char *opt_exclude;
d78d6610
DG		 47#if 0
48/* Not implemented yet */
49static char *opt_cmd_name;
50static pid_t opt_pid;
51#endif
f3ed775e
DG		 52
53enum {
54 OPT_HELP = 1,
f3ed775e 55 OPT_TRACEPOINT,
cf0e5467 56 OPT_PROBE,
f3ed775e 57 OPT_FUNCTION,
8f0d098b 58 OPT_FUNCTION_ENTRY,
a54bd42d 59 OPT_SYSCALL,
eeac7d46 60 OPT_USERSPACE,
0cda4f28
MD		 61 OPT_LOGLEVEL,
62 OPT_LOGLEVEL_ONLY,
679b4943 63 OPT_LIST_OPTIONS,
53a80697 64 OPT_FILTER,
fac3366c 65 OPT_EXCLUDE,
f3ed775e
DG		 66};
67
cd80958d
DG		 68static struct lttng_handle *handle;
69
f3ed775e
DG		 70static struct poptOption long_options[] = {
71 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
72 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42 73 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
e14f64a8 74 {"all", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
f3ed775e
DG		 75 {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
76 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
d78d6610 77 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
b9dfb167 78 {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
f3ed775e 79 {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
7ebae521 80 {"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
40e9d5d3 81 {"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
b213d387
MD		 82#if 0
83 /*
84 * Currently removed from lttng kernel tracer. Removed from
85 * lttng UI to discourage its use.
86 */
40e9d5d3 87 {"function:entry", 0, POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0},
b213d387 88#endif
7ebae521 89 {"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
0cda4f28
MD		 90 {"loglevel", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL, 0, 0},
91 {"loglevel-only", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL_ONLY, 0, 0},
679b4943 92 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
53a80697 93 {"filter", 'f', POPT_ARG_STRING, &opt_filter, OPT_FILTER, 0, 0},
fac3366c 94 {"exclude", 'x', POPT_ARG_STRING, &opt_exclude, OPT_EXCLUDE, 0, 0},
f3ed775e
DG		 95 {0, 0, 0, 0, 0, 0, 0}
96};
97
98/*
99 * usage
100 */
101static void usage(FILE *ofp)
102{
32a6298d 103 fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [-k|-u] [OPTIONS] \n");
f3ed775e 104 fprintf(ofp, "\n");
32a6298d 105 fprintf(ofp, "Options:\n");
f3ed775e 106 fprintf(ofp, " -h, --help Show this help\n");
679b4943 107 fprintf(ofp, " --list-options Simple listing of options\n");
32a6298d
DG		 108 fprintf(ofp, " -s, --session NAME Apply to session name\n");
109 fprintf(ofp, " -c, --channel NAME Apply to this channel\n");
e08bff8d 110 fprintf(ofp, " -a, --all Enable all tracepoints and syscalls\n");
f3ed775e 111 fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
27221701 112 fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
b9dfb167 113 fprintf(ofp, " -j, --jul Apply for Java application using JUL\n");
f3ed775e
DG		 114 fprintf(ofp, "\n");
115 fprintf(ofp, "Event options:\n");
116 fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
be49af1e
MD		 117 fprintf(ofp, " - userspace tracer supports wildcards at end of string.\n");
118 fprintf(ofp, " Don't forget to quote to deal with bash expansion.\n");
119 fprintf(ofp, " e.g.:\n");
120 fprintf(ofp, " \"*\"\n");
121 fprintf(ofp, " \"app_component:na*\"\n");
6a240cd9 122 fprintf(ofp, " --probe (addr | symbol | symbol+offset)\n");
cf0e5467
MD		 123 fprintf(ofp, " Dynamic probe.\n");
124 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
125 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
6a240cd9 126 fprintf(ofp, " --function (addr | symbol | symbol+offset)\n");
8f0d098b
MD		 127 fprintf(ofp, " Dynamic function entry/return probe.\n");
128 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
129 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
b213d387 130#if 0
8f0d098b
MD		 131 fprintf(ofp, " --function:entry symbol\n");
132 fprintf(ofp, " Function tracer event\n");
b213d387 133#endif
a54bd42d 134 fprintf(ofp, " --syscall System call event\n");
f3ed775e 135 fprintf(ofp, "\n");
300b8fd5
MD		 136 fprintf(ofp, " --loglevel name\n");
137 fprintf(ofp, " Tracepoint loglevel range from 0 to loglevel\n");
138 fprintf(ofp, " --loglevel-only name\n");
139 fprintf(ofp, " Tracepoint loglevel (only this loglevel)\n");
140 fprintf(ofp, "\n");
0c8477c8
MD		 141 fprintf(ofp, " The loglevel or loglevel-only options should be\n");
142 fprintf(ofp, " combined with a tracepoint name or tracepoint\n");
143 fprintf(ofp, " wildcard.\n");
144 fprintf(ofp, " Available loglevels:\n");
145 fprintf(ofp, " (higher value is more verbose)\n");
46839cc2
MD		 146 fprintf(ofp, " TRACE_EMERG = 0\n");
147 fprintf(ofp, " TRACE_ALERT = 1\n");
148 fprintf(ofp, " TRACE_CRIT = 2\n");
149 fprintf(ofp, " TRACE_ERR = 3\n");
150 fprintf(ofp, " TRACE_WARNING = 4\n");
151 fprintf(ofp, " TRACE_NOTICE = 5\n");
152 fprintf(ofp, " TRACE_INFO = 6\n");
153 fprintf(ofp, " TRACE_DEBUG_SYSTEM = 7\n");
154 fprintf(ofp, " TRACE_DEBUG_PROGRAM = 8\n");
155 fprintf(ofp, " TRACE_DEBUG_PROCESS = 9\n");
156 fprintf(ofp, " TRACE_DEBUG_MODULE = 10\n");
157 fprintf(ofp, " TRACE_DEBUG_UNIT = 11\n");
158 fprintf(ofp, " TRACE_DEBUG_FUNCTION = 12\n");
159 fprintf(ofp, " TRACE_DEBUG_LINE = 13\n");
160 fprintf(ofp, " TRACE_DEBUG = 14\n");
161 fprintf(ofp, " (shortcuts such as \"system\" are allowed)\n");
f2611ab0 162 fprintf(ofp, " -f, --filter \'expression\'\n");
ee8ccafa
MD		 163 fprintf(ofp, " Filter expression on event fields and context.\n");
164 fprintf(ofp, " Event recording depends on evaluation.\n");
919e300c
MD		 165 fprintf(ofp, " Only specify on first activation of\n");
166 fprintf(ofp, " a given event within a session.\n");
167 fprintf(ofp, " Filter only allowed when enabling\n");
168 fprintf(ofp, " events within a session before tracing\n");
9bd578f5
MD		 169 fprintf(ofp, " is started. If the filter fails to link\n");
170 fprintf(ofp, " with the event within the traced domain,\n");
171 fprintf(ofp, " the event will be discarded. Currently,\n");
172 fprintf(ofp, " filter is only implemented for the user-space\n");
173 fprintf(ofp, " tracer.\n");
174 fprintf(ofp, " Expression examples:.\n");
175 fprintf(ofp, " \n");
176 fprintf(ofp, " 'intfield > 500 && intfield < 503'\n");
6a240cd9 177 fprintf(ofp, " '(strfield == \"test\" || intfield != 10) && intfield > 33'\n");
9bd578f5
MD		 178 fprintf(ofp, " 'doublefield > 1.1 && intfield < 5.3'\n");
179 fprintf(ofp, " \n");
180 fprintf(ofp, " Wildcards are allowed at the end of strings:\n");
181 fprintf(ofp, " 'seqfield1 == \"te*\"'\n");
182 fprintf(ofp, " In string literals, the escape character is '\\'.\n");
183 fprintf(ofp, " Use '\\*' for the '*' character, and '\\\\' for\n");
ee8ccafa
MD		 184 fprintf(ofp, " the '\\' character. Wildcard match any sequence of,\n");
185 fprintf(ofp, " characters including an empty sub-string (match 0 or\n");
186 fprintf(ofp, " more characters).\n");
187 fprintf(ofp, "\n");
188 fprintf(ofp, " Context information can be used for filtering. The\n");
189 fprintf(ofp, " examples below show usage of context filtering on\n");
190 fprintf(ofp, " process name (with a wildcard), process ID range, and\n");
191 fprintf(ofp, " unique thread ID for filtering. The process and\n");
192 fprintf(ofp, " thread ID of running applications can be found under\n");
193 fprintf(ofp, " columns \"PID\" and \"LWP\" of the \"ps -eLf\" command.\n");
194 fprintf(ofp, "\n");
195 fprintf(ofp, " '$ctx.procname == \"demo*\"'\n");
196 fprintf(ofp, " '$ctx.vpid >= 4433 && $ctx.vpid < 4455'\n");
197 fprintf(ofp, " '$ctx.vtid == 1234'\n");
c2063d0b
JI		 198 fprintf(ofp, " -x, --exclude LIST\n");
199 fprintf(ofp, " Add exclusions to UST tracepoints:\n");
200 fprintf(ofp, " Events that match any of the items\n");
201 fprintf(ofp, " in the comma-separated LIST are not\n");
202 fprintf(ofp, " enabled, even if they match a wildcard\n");
203 fprintf(ofp, " definition of the event.\n");
300b8fd5 204 fprintf(ofp, "\n");
f3ed775e
DG		 205}
206
0d63dd19 207/*
6181537c 208 * Parse probe options.
0d63dd19 209 */
cf0e5467 210static int parse_probe_opts(struct lttng_event *ev, char *opt)
0d63dd19
DG		 211{
212 int ret;
8ff0bbd0 213 char s_hex[19];
0d63dd19
DG		 214 char name[LTTNG_SYMBOL_NAME_LEN];
215
216 if (opt == NULL) {
217 ret = -1;
8f0d098b 218 goto end;
0d63dd19
DG		 219 }
220
221 /* Check for symbol+offset */
8ff0bbd0 222 ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
0d63dd19 223 if (ret == 2) {
7d29a247 224 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0 225 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
cf0e5467 226 DBG("probe symbol %s", ev->attr.probe.symbol_name);
9d035200 227 if (*s_hex == '\0') {
8ff0bbd0 228 ERR("Invalid probe offset %s", s_hex);
0d63dd19 229 ret = -1;
8f0d098b 230 goto end;
0d63dd19 231 }
8ff0bbd0 232 ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
cf0e5467 233 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
3000dc78 234 ev->attr.probe.addr = 0;
8f0d098b
MD		 235 goto end;
236 }
237
238 /* Check for symbol */
239 if (isalpha(name[0])) {
240 ret = sscanf(opt, "%s", name);
241 if (ret == 1) {
242 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0 243 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
8f0d098b
MD		 244 DBG("probe symbol %s", ev->attr.probe.symbol_name);
245 ev->attr.probe.offset = 0;
246 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
247 ev->attr.probe.addr = 0;
248 goto end;
249 }
0d63dd19
DG		 250 }
251
252 /* Check for address */
8ff0bbd0 253 ret = sscanf(opt, "%s", s_hex);
0d63dd19 254 if (ret > 0) {
9d035200 255 if (*s_hex == '\0') {
8ff0bbd0 256 ERR("Invalid probe address %s", s_hex);
0d63dd19 257 ret = -1;
8f0d098b 258 goto end;
0d63dd19 259 }
8ff0bbd0 260 ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
cf0e5467 261 DBG("probe addr %" PRIu64, ev->attr.probe.addr);
3000dc78
DG		 262 ev->attr.probe.offset = 0;
263 memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
8f0d098b 264 goto end;
0d63dd19
DG		 265 }
266
267 /* No match */
268 ret = -1;
269
8f0d098b 270end:
0d63dd19
DG		 271 return ret;
272}
273
8005f29a 274/*
0c8477c8 275 * Maps loglevel from string to value
8005f29a
MD		 276 */
277static
46839cc2 278int loglevel_str_to_value(const char *inputstr)
8005f29a 279{
46839cc2
MD		 280 int i = 0;
281 char str[LTTNG_SYMBOL_NAME_LEN];
282
e051e07c
DG		 283 /*
284 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
285 * added at the end of the loop so a the upper bound we avoid the overflow.
286 */
287 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
46839cc2
MD		 288 str[i] = toupper(inputstr[i]);
289 i++;
290 }
291 str[i] = '\0';
292 if (!strcmp(str, "TRACE_EMERG") || !strcmp(str, "EMERG")) {
293 return LTTNG_LOGLEVEL_EMERG;
294 } else if (!strcmp(str, "TRACE_ALERT") || !strcmp(str, "ALERT")) {
295 return LTTNG_LOGLEVEL_ALERT;
296 } else if (!strcmp(str, "TRACE_CRIT") || !strcmp(str, "CRIT")) {
297 return LTTNG_LOGLEVEL_CRIT;
298 } else if (!strcmp(str, "TRACE_ERR") || !strcmp(str, "ERR")) {
299 return LTTNG_LOGLEVEL_ERR;
300 } else if (!strcmp(str, "TRACE_WARNING") || !strcmp(str, "WARNING")) {
301 return LTTNG_LOGLEVEL_WARNING;
302 } else if (!strcmp(str, "TRACE_NOTICE") || !strcmp(str, "NOTICE")) {
303 return LTTNG_LOGLEVEL_NOTICE;
304 } else if (!strcmp(str, "TRACE_INFO") || !strcmp(str, "INFO")) {
305 return LTTNG_LOGLEVEL_INFO;
306 } else if (!strcmp(str, "TRACE_DEBUG_SYSTEM") || !strcmp(str, "DEBUG_SYSTEM") || !strcmp(str, "SYSTEM")) {
307 return LTTNG_LOGLEVEL_DEBUG_SYSTEM;
308 } else if (!strcmp(str, "TRACE_DEBUG_PROGRAM") || !strcmp(str, "DEBUG_PROGRAM") || !strcmp(str, "PROGRAM")) {
309 return LTTNG_LOGLEVEL_DEBUG_PROGRAM;
310 } else if (!strcmp(str, "TRACE_DEBUG_PROCESS") || !strcmp(str, "DEBUG_PROCESS") || !strcmp(str, "PROCESS")) {
311 return LTTNG_LOGLEVEL_DEBUG_PROCESS;
312 } else if (!strcmp(str, "TRACE_DEBUG_MODULE") || !strcmp(str, "DEBUG_MODULE") || !strcmp(str, "MODULE")) {
313 return LTTNG_LOGLEVEL_DEBUG_MODULE;
314 } else if (!strcmp(str, "TRACE_DEBUG_UNIT") || !strcmp(str, "DEBUG_UNIT") || !strcmp(str, "UNIT")) {
315 return LTTNG_LOGLEVEL_DEBUG_UNIT;
316 } else if (!strcmp(str, "TRACE_DEBUG_FUNCTION") || !strcmp(str, "DEBUG_FUNCTION") || !strcmp(str, "FUNCTION")) {
317 return LTTNG_LOGLEVEL_DEBUG_FUNCTION;
318 } else if (!strcmp(str, "TRACE_DEBUG_LINE") || !strcmp(str, "DEBUG_LINE") || !strcmp(str, "LINE")) {
319 return LTTNG_LOGLEVEL_DEBUG_LINE;
320 } else if (!strcmp(str, "TRACE_DEBUG") || !strcmp(str, "DEBUG")) {
321 return LTTNG_LOGLEVEL_DEBUG;
8005f29a
MD		 322 } else {
323 return -1;
324 }
325}
326
85076754
MD		 327static
328const char *print_channel_name(const char *name)
329{
330 return name ? : DEFAULT_CHANNEL_NAME;
331}
332
333static
334const char *print_raw_channel_name(const char *name)
335{
336 return name ? : "<default>";
337}
338
748bde76
JI		 339/*
340 * Compare list of exclusions against an event name.
341 * Return a list of legal exclusion names.
342 * Produce an error or a warning about others (depending on the situation)
343 */
344static
345int check_exclusion_subsets(const char *event_name,
346 const char *exclusions,
347 int *exclusion_count_ptr,
348 char ***exclusion_list_ptr)
349{
350 const char *excluder_ptr;
351 const char *event_ptr;
352 const char *next_excluder;
353 int excluder_length;
354 int exclusion_count = 0;
355 char **exclusion_list = NULL;
356 int ret = CMD_SUCCESS;
357
358 if (event_name[strlen(event_name) - 1] != '*') {
359 ERR("Event %s: Excluders can only be used with wildcarded events", event_name);
360 goto error;
361 }
362
363 next_excluder = exclusions;
364 while (*next_excluder != 0) {
365 event_ptr = event_name;
366 excluder_ptr = next_excluder;
367 excluder_length = strcspn(next_excluder, ",");
368
369 /* Scan both the excluder and the event letter by letter */
370 while (1) {
371 char e, x;
372
373 e = *event_ptr;
374 x = *excluder_ptr;
375
376 if (x == '*') {
377 /* Event is a subset of the excluder */
378 ERR("Event %s: %.*s excludes all events from %s",
379 event_name,
380 excluder_length,
381 next_excluder,
382 event_name);
383 goto error;
384 }
385 if (e == '*') {
386 /* Excluder is a proper subset of event */
387 exclusion_count++;
388 exclusion_list = realloc(exclusion_list, sizeof(char **) * exclusion_count);
389 exclusion_list[exclusion_count - 1] = strndup(next_excluder, excluder_length);
390
391 break;
392 }
393 if (x != e) {
394 /* Excluder and event sets have no common elements */
395 WARN("Event %s: %.*s does not exclude any events from %s",
396 event_name,
397 excluder_length,
398 next_excluder,
399 event_name);
400 break;
401 }
402 excluder_ptr++;
403 event_ptr++;
404 }
405 /* next excluder */
406 next_excluder += excluder_length;
407 if (*next_excluder == ',') {
408 next_excluder++;
409 }
410 }
411 goto end;
412error:
413 while (exclusion_count--) {
414 free(exclusion_list[exclusion_count]);
415 }
416 if (exclusion_list != NULL) {
417 free(exclusion_list);
418 }
419 exclusion_list = NULL;
420 exclusion_count = 0;
421 ret = CMD_ERROR;
422end:
423 *exclusion_count_ptr = exclusion_count;
424 *exclusion_list_ptr = exclusion_list;
425 return ret;
426}
f3ed775e 427/*
6181537c 428 * Enabling event using the lttng API.
f3ed775e 429 */
cd80958d 430static int enable_events(char *session_name)
f3ed775e 431{
85076754 432 int ret = CMD_SUCCESS, warn = 0;
b73d0b29 433 char *event_name, *channel_name = NULL;
f3ed775e 434 struct lttng_event ev;
7d29a247 435 struct lttng_domain dom;
f3ed775e 436
441c16a7
MD		 437 memset(&ev, 0, sizeof(ev));
438 memset(&dom, 0, sizeof(dom));
439
53a80697
MD		 440 if (opt_kernel) {
441 if (opt_filter) {
442 ERR("Filter not implement for kernel tracing yet");
443 ret = CMD_ERROR;
444 goto error;
445 }
67b58630
JG		 446 if (opt_loglevel) {
447 WARN("Kernel loglevels are not supported.");
448 }
53a80697
MD		 449 }
450
7d29a247
DG		 451 /* Create lttng domain */
452 if (opt_kernel) {
453 dom.type = LTTNG_DOMAIN_KERNEL;
7972aab2 454 dom.buf_type = LTTNG_BUFFER_GLOBAL;
d78d6610 455 } else if (opt_userspace) {
2bdd86d4 456 dom.type = LTTNG_DOMAIN_UST;
7972aab2 457 /* Default. */
8692d4e5 458 dom.buf_type = LTTNG_BUFFER_PER_UID;
b9dfb167
DG		 459 } else if (opt_jul) {
460 dom.type = LTTNG_DOMAIN_JUL;
461 /* Default. */
462 dom.buf_type = LTTNG_BUFFER_PER_UID;
6181537c 463 } else {
b9dfb167 464 print_missing_domain();
d16c1a4c 465 ret = CMD_ERROR;
6181537c 466 goto error;
2bdd86d4 467 }
7d29a247 468
85076754 469 channel_name = opt_channel_name;
ae856491 470
cd80958d
DG		 471 handle = lttng_create_handle(session_name, &dom);
472 if (handle == NULL) {
473 ret = -1;
474 goto error;
475 }
1aef21b6 476
cd80958d 477 if (opt_enable_all) {
8c9ae521 478 /* Default setup for enable all */
75e8c5ab
MD		 479 if (opt_kernel) {
480 ev.type = opt_event_type;
481 ev.name[0] = '\0';
300b8fd5
MD		 482 /* kernel loglevels not implemented */
483 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
75e8c5ab
MD		 484 } else {
485 ev.type = LTTNG_EVENT_TRACEPOINT;
486 strcpy(ev.name, "*");
300b8fd5
MD		 487 ev.loglevel_type = opt_loglevel_type;
488 if (opt_loglevel) {
489 ev.loglevel = loglevel_str_to_value(opt_loglevel);
490 if (ev.loglevel == -1) {
491 ERR("Unknown loglevel %s", opt_loglevel);
2f70b271 492 ret = -LTTNG_ERR_INVALID;
300b8fd5
MD		 493 goto error;
494 }
22e25b71
MD		 495 } else {
496 ev.loglevel = -1;
300b8fd5 497 }
75e8c5ab 498 }
8c9ae521 499
025faf73
DG		 500 if (!opt_filter) {
501 ret = lttng_enable_event(handle, &ev, channel_name);
502 if (ret < 0) {
503 switch (-ret) {
504 case LTTNG_ERR_KERN_EVENT_EXIST:
505 WARN("Kernel events already enabled (channel %s, session %s)",
85076754 506 print_channel_name(channel_name), session_name);
025faf73
DG		 507 break;
508 default:
509 ERR("Events: %s (channel %s, session %s)",
85076754
MD		 510 lttng_strerror(ret),
511 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
512 ? print_raw_channel_name(channel_name)
513 : print_channel_name(channel_name),
514 session_name);
025faf73
DG		 515 break;
516 }
517 goto end;
42224349 518 }
8c9ae521 519
025faf73
DG		 520 switch (opt_event_type) {
521 case LTTNG_EVENT_TRACEPOINT:
67b58630 522 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
025faf73 523 MSG("All %s tracepoints are enabled in channel %s for loglevel %s",
b9dfb167 524 get_domain_str(dom.type),
85076754 525 print_channel_name(channel_name),
025faf73
DG		 526 opt_loglevel);
527 } else {
528 MSG("All %s tracepoints are enabled in channel %s",
b9dfb167 529 get_domain_str(dom.type),
85076754 530 print_channel_name(channel_name));
025faf73
DG		 531 }
532 break;
533 case LTTNG_EVENT_SYSCALL:
534 if (opt_kernel) {
535 MSG("All kernel system calls are enabled in channel %s",
85076754 536 print_channel_name(channel_name));
025faf73
DG		 537 }
538 break;
539 case LTTNG_EVENT_ALL:
67b58630 540 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
025faf73 541 MSG("All %s events are enabled in channel %s for loglevel %s",
b9dfb167 542 get_domain_str(dom.type),
85076754 543 print_channel_name(channel_name),
025faf73
DG		 544 opt_loglevel);
545 } else {
546 MSG("All %s events are enabled in channel %s",
b9dfb167 547 get_domain_str(dom.type),
85076754 548 print_channel_name(channel_name));
025faf73
DG		 549 }
550 break;
551 default:
552 /*
553 * We should not be here since lttng_enable_event should have
554 * failed on the event type.
555 */
556 goto error;
57064ada 557 }
f3ed775e 558 }
025faf73
DG		 559 if (opt_filter) {
560 ret = lttng_enable_event_with_filter(handle, &ev, channel_name,
16363652
DG		 561 opt_filter);
562 if (ret < 0) {
563 switch (-ret) {
564 case LTTNG_ERR_FILTER_EXIST:
85076754 565 WARN("Filter on all events is already enabled"
16363652 566 " (channel %s, session %s)",
85076754 567 print_channel_name(channel_name), session_name);
16363652
DG		 568 break;
569 default:
85076754
MD		 570 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
571 lttng_strerror(ret),
572 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
573 ? print_raw_channel_name(channel_name)
574 : print_channel_name(channel_name),
575 session_name, opt_filter);
16363652
DG		 576 break;
577 }
578 goto error;
579 } else {
580 MSG("Filter '%s' successfully set", opt_filter);
581 }
582 }
8c9ae521 583 goto end;
f3ed775e
DG		 584 }
585
586 /* Strip event list */
587 event_name = strtok(opt_event_list, ",");
588 while (event_name != NULL) {
6181537c
DG		 589 /* Copy name and type of the event */
590 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
591 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
592 ev.type = opt_event_type;
593
f3ed775e
DG		 594 /* Kernel tracer action */
595 if (opt_kernel) {
596 DBG("Enabling kernel event %s for channel %s",
85076754
MD		 597 event_name,
598 print_channel_name(channel_name));
f3ed775e
DG		 599
600 switch (opt_event_type) {
7a3d1328
MD		 601 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
602 ev.type = LTTNG_EVENT_TRACEPOINT;
603 /* Fall-through */
e6ddca71 604 case LTTNG_EVENT_TRACEPOINT:
f3ed775e 605 break;
7d29a247 606 case LTTNG_EVENT_PROBE:
cf0e5467 607 ret = parse_probe_opts(&ev, opt_probe);
0d63dd19 608 if (ret < 0) {
cf0e5467 609 ERR("Unable to parse probe options");
0d63dd19
DG		 610 ret = 0;
611 goto error;
612 }
f3ed775e
DG		 613 break;
614 case LTTNG_EVENT_FUNCTION:
8f0d098b
MD		 615 ret = parse_probe_opts(&ev, opt_function);
616 if (ret < 0) {
617 ERR("Unable to parse function probe options");
618 ret = 0;
619 goto error;
620 }
621 break;
622 case LTTNG_EVENT_FUNCTION_ENTRY:
6181537c
DG		 623 strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
624 LTTNG_SYMBOL_NAME_LEN);
99497cd0 625 ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e 626 break;
a54bd42d 627 case LTTNG_EVENT_SYSCALL:
6181537c
DG		 628 MSG("per-syscall selection not supported yet. Use \"-a\" "
629 "for all syscalls.");
f3ed775e 630 default:
1ab1ea0b 631 ret = CMD_UNDEFINED;
f3ed775e
DG		 632 goto error;
633 }
0cda4f28 634
0cda4f28 635 /* kernel loglevels not implemented */
8005f29a 636 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
f3ed775e 637 } else if (opt_userspace) { /* User-space tracer action */
d78d6610 638#if 0
e14f64a8
DG		 639 if (opt_cmd_name != NULL || opt_pid) {
640 MSG("Only supporting tracing all UST processes (-u) for now.");
1ab1ea0b 641 ret = CMD_UNDEFINED;
2bdd86d4
MD		 642 goto error;
643 }
d78d6610 644#endif
6181537c 645
300b8fd5 646 DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
85076754 647 print_channel_name(channel_name), opt_loglevel ? : "<all>");
2bdd86d4
MD		 648
649 switch (opt_event_type) {
650 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
2bdd86d4
MD		 651 /* Fall-through */
652 case LTTNG_EVENT_TRACEPOINT:
e4baff1e
MD		 653 /* Copy name and type of the event */
654 ev.type = LTTNG_EVENT_TRACEPOINT;
655 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
656 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
2bdd86d4
MD		 657 break;
658 case LTTNG_EVENT_PROBE:
659 case LTTNG_EVENT_FUNCTION:
660 case LTTNG_EVENT_FUNCTION_ENTRY:
661 case LTTNG_EVENT_SYSCALL:
662 default:
cc62c0c0 663 ERR("Event type not available for user-space tracing");
4ce78777 664 ret = CMD_UNSUPPORTED;
2bdd86d4
MD		 665 goto error;
666 }
0cda4f28
MD		 667
668 ev.loglevel_type = opt_loglevel_type;
ed7f4083 669 if (opt_loglevel) {
8005f29a
MD		 670 ev.loglevel = loglevel_str_to_value(opt_loglevel);
671 if (ev.loglevel == -1) {
672 ERR("Unknown loglevel %s", opt_loglevel);
2f70b271 673 ret = -LTTNG_ERR_INVALID;
8005f29a
MD		 674 goto error;
675 }
22e25b71
MD		 676 } else {
677 ev.loglevel = -1;
ed7f4083 678 }
b9dfb167
DG		 679 } else if (opt_jul) {
680 if (opt_event_type != LTTNG_EVENT_ALL &&
681 opt_event_type != LTTNG_EVENT_TRACEPOINT) {
682 ERR("Event type not supported for JUL domain.");
683 ret = CMD_UNSUPPORTED;
684 goto error;
685 }
686 ev.type = LTTNG_EVENT_TRACEPOINT;
687 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
688 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e 689 } else {
b9dfb167 690 print_missing_domain();
300b8fd5 691 ret = CMD_ERROR;
f3ed775e
DG		 692 goto error;
693 }
694
025faf73
DG		 695 if (!opt_filter) {
696 ret = lttng_enable_event(handle, &ev, channel_name);
697 if (ret < 0) {
698 /* Turn ret to positive value to handle the positive error code */
699 switch (-ret) {
700 case LTTNG_ERR_KERN_EVENT_EXIST:
701 WARN("Kernel event %s already enabled (channel %s, session %s)",
85076754
MD		 702 event_name,
703 print_channel_name(channel_name), session_name);
025faf73
DG		 704 break;
705 default:
706 ERR("Event %s: %s (channel %s, session %s)", event_name,
85076754
MD		 707 lttng_strerror(ret),
708 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
709 ? print_raw_channel_name(channel_name)
710 : print_channel_name(channel_name),
711 session_name);
025faf73
DG		 712 break;
713 }
714 warn = 1;
715 } else {
716 MSG("%s event %s created in channel %s",
b9dfb167 717 get_domain_str(dom.type), event_name,
85076754 718 print_channel_name(channel_name));
42224349 719 }
6181537c 720 }
025faf73
DG		 721
722 if (opt_filter) {
723 ret = lttng_enable_event_with_filter(handle, &ev, channel_name,
16363652 724 opt_filter);
53a80697 725 if (ret < 0) {
7671f53c
CB		 726 switch (-ret) {
727 case LTTNG_ERR_FILTER_EXIST:
ff7ef7b8 728 WARN("Filter on event %s is already enabled"
7671f53c 729 " (channel %s, session %s)",
85076754
MD		 730 event_name,
731 print_channel_name(channel_name), session_name);
7671f53c
CB		 732 break;
733 default:
85076754
MD		 734 ERR("Event %s: %s (channel %s, session %s, filter \'%s\')", ev.name,
735 lttng_strerror(ret),
736 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
737 ? print_raw_channel_name(channel_name)
738 : print_channel_name(channel_name),
739 session_name, opt_filter);
7671f53c
CB		 740 break;
741 }
53a80697 742 goto error;
16363652
DG		 743 } else {
744 MSG("Filter '%s' successfully set", opt_filter);
53a80697
MD		 745 }
746 }
6181537c 747
f3ed775e
DG		 748 /* Next event */
749 event_name = strtok(NULL, ",");
750 }
751
8c9ae521 752end:
f3ed775e 753error:
ae856491
DG		 754 if (warn) {
755 ret = CMD_WARNING;
756 }
cd80958d
DG		 757 lttng_destroy_handle(handle);
758
f3ed775e
DG		 759 return ret;
760}
761
762/*
6181537c 763 * Add event to trace session
f3ed775e
DG		 764 */
765int cmd_enable_events(int argc, const char **argv)
766{
ca1c3607 767 int opt, ret = CMD_SUCCESS;
f3ed775e 768 static poptContext pc;
cd80958d 769 char *session_name = NULL;
de044b7a 770 int event_type = -1;
f3ed775e
DG		 771
772 pc = poptGetContext(NULL, argc, argv, long_options, 0);
773 poptReadDefaultConfig(pc, 0);
774
775 /* Default event type */
7a3d1328 776 opt_event_type = LTTNG_EVENT_ALL;
f3ed775e
DG		 777
778 while ((opt = poptGetNextOpt(pc)) != -1) {
779 switch (opt) {
780 case OPT_HELP:
ca1c3607 781 usage(stdout);
f3ed775e 782 goto end;
f3ed775e 783 case OPT_TRACEPOINT:
e6ddca71 784 opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e 785 break;
cf0e5467 786 case OPT_PROBE:
7d29a247 787 opt_event_type = LTTNG_EVENT_PROBE;
f3ed775e
DG		 788 break;
789 case OPT_FUNCTION:
790 opt_event_type = LTTNG_EVENT_FUNCTION;
8f0d098b
MD		 791 break;
792 case OPT_FUNCTION_ENTRY:
793 opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
f3ed775e 794 break;
a54bd42d
MD		 795 case OPT_SYSCALL:
796 opt_event_type = LTTNG_EVENT_SYSCALL;
0133c199 797 break;
eeac7d46
MD		 798 case OPT_USERSPACE:
799 opt_userspace = 1;
eeac7d46 800 break;
0cda4f28 801 case OPT_LOGLEVEL:
8005f29a 802 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
0cda4f28
MD		 803 opt_loglevel = poptGetOptArg(pc);
804 break;
805 case OPT_LOGLEVEL_ONLY:
8005f29a 806 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
0cda4f28 807 opt_loglevel = poptGetOptArg(pc);
13dce3b7 808 break;
679b4943
SM		 809 case OPT_LIST_OPTIONS:
810 list_cmd_options(stdout, long_options);
679b4943 811 goto end;
53a80697
MD		 812 case OPT_FILTER:
813 break;
fac3366c
JI		 814 case OPT_EXCLUDE:
815 break;
f3ed775e
DG		 816 default:
817 usage(stderr);
818 ret = CMD_UNDEFINED;
819 goto end;
820 }
de044b7a
DG		 821
822 /* Validate event type. Multiple event type are not supported. */
823 if (event_type == -1) {
824 event_type = opt_event_type;
825 } else {
826 if (event_type != opt_event_type) {
827 ERR("Multiple event type not supported.");
828 ret = CMD_ERROR;
829 goto end;
830 }
831 }
f3ed775e
DG		 832 }
833
834 opt_event_list = (char*) poptGetArg(pc);
835 if (opt_event_list == NULL && opt_enable_all == 0) {
836 ERR("Missing event name(s).\n");
837 usage(stderr);
ca1c3607 838 ret = CMD_ERROR;
f3ed775e
DG		 839 goto end;
840 }
841
cd80958d
DG		 842 if (!opt_session_name) {
843 session_name = get_session_name();
844 if (session_name == NULL) {
ca1c3607 845 ret = CMD_ERROR;
cd80958d
DG		 846 goto end;
847 }
848 } else {
849 session_name = opt_session_name;
850 }
851
852 ret = enable_events(session_name);
f3ed775e
DG		 853
854end:
cd80958d
DG		 855 if (opt_session_name == NULL) {
856 free(session_name);
857 }
858
ca1c3607 859 poptFreeContext(pc);
f3ed775e
DG		 860 return ret;
861}
LTTng tools - Deliverables
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