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Implement support for lttng-modules syscall filtering
[lttng-tools.git] / src / bin / lttng / commands / enable_events.c
1 /*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
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.
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 *
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.
16 */
17
18 #define _GNU_SOURCE
19 #include <assert.h>
20 #include <popt.h>
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24 #include <sys/stat.h>
25 #include <sys/types.h>
26 #include <unistd.h>
27 #include <inttypes.h>
28 #include <ctype.h>
29
30 #include <src/common/sessiond-comm/sessiond-comm.h>
31
32 /* Mi dependancy */
33 #include <common/mi-lttng.h>
34
35 #include "../command.h"
36
37 #if (LTTNG_SYMBOL_NAME_LEN == 256)
38 #define LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "255"
39 #endif
40
41 static char *opt_event_list;
42 static int opt_event_type;
43 static const char *opt_loglevel;
44 static int opt_loglevel_type;
45 static int opt_kernel;
46 static char *opt_session_name;
47 static int opt_userspace;
48 static int opt_jul;
49 static int opt_log4j;
50 static int opt_enable_all;
51 static char *opt_probe;
52 static char *opt_function;
53 static char *opt_function_entry_symbol;
54 static char *opt_channel_name;
55 static char *opt_filter;
56 static char *opt_exclude;
57 #if 0
58 /* Not implemented yet */
59 static char *opt_cmd_name;
60 static pid_t opt_pid;
61 #endif
62
63 enum {
64 OPT_HELP = 1,
65 OPT_TRACEPOINT,
66 OPT_PROBE,
67 OPT_FUNCTION,
68 OPT_FUNCTION_ENTRY,
69 OPT_SYSCALL,
70 OPT_USERSPACE,
71 OPT_LOGLEVEL,
72 OPT_LOGLEVEL_ONLY,
73 OPT_LIST_OPTIONS,
74 OPT_FILTER,
75 OPT_EXCLUDE,
76 };
77
78 static struct lttng_handle *handle;
79 static struct mi_writer *writer;
80
81 static struct poptOption long_options[] = {
82 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
83 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
84 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
85 {"all", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
86 {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
87 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
88 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
89 {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
90 {"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0},
91 {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
92 {"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
93 {"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
94 #if 0
95 /*
96 * Currently removed from lttng kernel tracer. Removed from
97 * lttng UI to discourage its use.
98 */
99 {"function:entry", 0, POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0},
100 #endif
101 {"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
102 {"loglevel", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL, 0, 0},
103 {"loglevel-only", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL_ONLY, 0, 0},
104 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
105 {"filter", 'f', POPT_ARG_STRING, &opt_filter, OPT_FILTER, 0, 0},
106 {"exclude", 'x', POPT_ARG_STRING, &opt_exclude, OPT_EXCLUDE, 0, 0},
107 {0, 0, 0, 0, 0, 0, 0}
108 };
109
110 /*
111 * usage
112 */
113 static void usage(FILE *ofp)
114 {
115 fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [-k|-u] [OPTIONS] \n");
116 fprintf(ofp, "\n");
117 fprintf(ofp, "Options:\n");
118 fprintf(ofp, " -h, --help Show this help\n");
119 fprintf(ofp, " --list-options Simple listing of options\n");
120 fprintf(ofp, " -s, --session NAME Apply to session name\n");
121 fprintf(ofp, " -c, --channel NAME Apply to this channel\n");
122 fprintf(ofp, " -a, --all Enable all tracepoints and syscalls\n");
123 fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
124 fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
125 fprintf(ofp, " -j, --jul Apply for Java application using JUL\n");
126 fprintf(ofp, " -l, --log4j Apply for Java application using LOG4j\n");
127 fprintf(ofp, "\n");
128 fprintf(ofp, "Event options:\n");
129 fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
130 fprintf(ofp, " - userspace tracer supports wildcards at end of string.\n");
131 fprintf(ofp, " Don't forget to quote to deal with bash expansion.\n");
132 fprintf(ofp, " e.g.:\n");
133 fprintf(ofp, " \"*\"\n");
134 fprintf(ofp, " \"app_component:na*\"\n");
135 fprintf(ofp, " --probe (addr | symbol | symbol+offset)\n");
136 fprintf(ofp, " Dynamic probe.\n");
137 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
138 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
139 fprintf(ofp, " --function (addr | symbol | symbol+offset)\n");
140 fprintf(ofp, " Dynamic function entry/return probe.\n");
141 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
142 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
143 #if 0
144 fprintf(ofp, " --function:entry symbol\n");
145 fprintf(ofp, " Function tracer event\n");
146 #endif
147 fprintf(ofp, " --syscall System call event\n");
148 fprintf(ofp, "\n");
149 fprintf(ofp, " --loglevel name\n");
150 fprintf(ofp, " Tracepoint loglevel range from 0 to loglevel.\n");
151 fprintf(ofp, " For JUL/LOG4j domain, see the table below for the range values.\n");
152 fprintf(ofp, " --loglevel-only name\n");
153 fprintf(ofp, " Tracepoint loglevel (only this loglevel)\n");
154 fprintf(ofp, "\n");
155 fprintf(ofp, " The loglevel or loglevel-only options should be\n");
156 fprintf(ofp, " combined with a tracepoint name or tracepoint\n");
157 fprintf(ofp, " wildcard.\n");
158 fprintf(ofp, " Available loglevels:\n");
159 fprintf(ofp, " (higher value is more verbose)\n");
160 fprintf(ofp, " TRACE_EMERG = 0\n");
161 fprintf(ofp, " TRACE_ALERT = 1\n");
162 fprintf(ofp, " TRACE_CRIT = 2\n");
163 fprintf(ofp, " TRACE_ERR = 3\n");
164 fprintf(ofp, " TRACE_WARNING = 4\n");
165 fprintf(ofp, " TRACE_NOTICE = 5\n");
166 fprintf(ofp, " TRACE_INFO = 6\n");
167 fprintf(ofp, " TRACE_DEBUG_SYSTEM = 7\n");
168 fprintf(ofp, " TRACE_DEBUG_PROGRAM = 8\n");
169 fprintf(ofp, " TRACE_DEBUG_PROCESS = 9\n");
170 fprintf(ofp, " TRACE_DEBUG_MODULE = 10\n");
171 fprintf(ofp, " TRACE_DEBUG_UNIT = 11\n");
172 fprintf(ofp, " TRACE_DEBUG_FUNCTION = 12\n");
173 fprintf(ofp, " TRACE_DEBUG_LINE = 13\n");
174 fprintf(ofp, " TRACE_DEBUG = 14\n");
175 fprintf(ofp, " (shortcuts such as \"system\" are allowed)\n");
176 fprintf(ofp, "\n");
177 fprintf(ofp, " Available JUL domain loglevels:\n");
178 fprintf(ofp, " JUL_OFF = INT32_MAX\n");
179 fprintf(ofp, " JUL_SEVERE = %d\n", LTTNG_LOGLEVEL_JUL_SEVERE);
180 fprintf(ofp, " JUL_WARNING = %d\n", LTTNG_LOGLEVEL_JUL_WARNING);
181 fprintf(ofp, " JUL_INFO = %d\n", LTTNG_LOGLEVEL_JUL_INFO);
182 fprintf(ofp, " JUL_CONFIG = %d\n", LTTNG_LOGLEVEL_JUL_CONFIG);
183 fprintf(ofp, " JUL_FINE = %d\n", LTTNG_LOGLEVEL_JUL_FINE);
184 fprintf(ofp, " JUL_FINER = %d\n", LTTNG_LOGLEVEL_JUL_FINER);
185 fprintf(ofp, " JUL_FINEST = %d\n", LTTNG_LOGLEVEL_JUL_FINEST);
186 fprintf(ofp, " JUL_ALL = INT32_MIN\n");
187 fprintf(ofp, " (shortcuts such as \"severe\" are allowed)\n");
188 fprintf(ofp, "\n");
189 fprintf(ofp, " Available LOG4j domain loglevels:\n");
190 fprintf(ofp, " LOG4J_OFF = INT32_MAX\n");
191 fprintf(ofp, " LOG4J_FATAL = %d\n", LTTNG_LOGLEVEL_LOG4J_FATAL);
192 fprintf(ofp, " LOG4J_ERROR = %d\n", LTTNG_LOGLEVEL_LOG4J_ERROR);
193 fprintf(ofp, " LOG4J_WARN = %d\n", LTTNG_LOGLEVEL_LOG4J_WARN);
194 fprintf(ofp, " LOG4J_INFO = %d\n", LTTNG_LOGLEVEL_LOG4J_INFO);
195 fprintf(ofp, " LOG4J_DEBUG = %d\n", LTTNG_LOGLEVEL_LOG4J_DEBUG);
196 fprintf(ofp, " LOG4J_TRACE = %d\n", LTTNG_LOGLEVEL_LOG4J_TRACE);
197 fprintf(ofp, " LOG4J_ALL = INT32_MIN\n");
198 fprintf(ofp, " (shortcuts such as \"severe\" are allowed)\n");
199 fprintf(ofp, "\n");
200 fprintf(ofp, " -f, --filter \'expression\'\n");
201 fprintf(ofp, " Filter expression on event fields and context.\n");
202 fprintf(ofp, " Event recording depends on evaluation.\n");
203 fprintf(ofp, " Only specify on first activation of\n");
204 fprintf(ofp, " a given event within a session.\n");
205 fprintf(ofp, " Filter only allowed when enabling\n");
206 fprintf(ofp, " events within a session before tracing\n");
207 fprintf(ofp, " is started. If the filter fails to link\n");
208 fprintf(ofp, " with the event within the traced domain,\n");
209 fprintf(ofp, " the event will be discarded. Currently,\n");
210 fprintf(ofp, " filter is only implemented for the user-space\n");
211 fprintf(ofp, " tracer.\n");
212 fprintf(ofp, " Expression examples:.\n");
213 fprintf(ofp, " \n");
214 fprintf(ofp, " 'intfield > 500 && intfield < 503'\n");
215 fprintf(ofp, " '(strfield == \"test\" || intfield != 10) && intfield > 33'\n");
216 fprintf(ofp, " 'doublefield > 1.1 && intfield < 5.3'\n");
217 fprintf(ofp, " \n");
218 fprintf(ofp, " Wildcards are allowed at the end of strings:\n");
219 fprintf(ofp, " 'seqfield1 == \"te*\"'\n");
220 fprintf(ofp, " In string literals, the escape character is '\\'.\n");
221 fprintf(ofp, " Use '\\*' for the '*' character, and '\\\\' for\n");
222 fprintf(ofp, " the '\\' character. Wildcard match any sequence of,\n");
223 fprintf(ofp, " characters including an empty sub-string (match 0 or\n");
224 fprintf(ofp, " more characters).\n");
225 fprintf(ofp, "\n");
226 fprintf(ofp, " Context information can be used for filtering. The\n");
227 fprintf(ofp, " examples below show usage of context filtering on\n");
228 fprintf(ofp, " process name (with a wildcard), process ID range, and\n");
229 fprintf(ofp, " unique thread ID for filtering. The process and\n");
230 fprintf(ofp, " thread ID of running applications can be found under\n");
231 fprintf(ofp, " columns \"PID\" and \"LWP\" of the \"ps -eLf\" command.\n");
232 fprintf(ofp, "\n");
233 fprintf(ofp, " '$ctx.procname == \"demo*\"'\n");
234 fprintf(ofp, " '$ctx.vpid >= 4433 && $ctx.vpid < 4455'\n");
235 fprintf(ofp, " '$ctx.vtid == 1234'\n");
236 fprintf(ofp, " -x, --exclude LIST\n");
237 fprintf(ofp, " Add exclusions to UST tracepoints:\n");
238 fprintf(ofp, " Events that match any of the items\n");
239 fprintf(ofp, " in the comma-separated LIST are not\n");
240 fprintf(ofp, " enabled, even if they match a wildcard\n");
241 fprintf(ofp, " definition of the event.\n");
242 fprintf(ofp, "\n");
243 }
244
245 /*
246 * Parse probe options.
247 */
248 static int parse_probe_opts(struct lttng_event *ev, char *opt)
249 {
250 int ret = CMD_SUCCESS;
251 int match;
252 char s_hex[19];
253 #define S_HEX_LEN_SCANF_IS_A_BROKEN_API "18" /* 18 is (19 - 1) (\0 is extra) */
254 char name[LTTNG_SYMBOL_NAME_LEN];
255
256 if (opt == NULL) {
257 ret = CMD_ERROR;
258 goto end;
259 }
260
261 /* Check for symbol+offset */
262 match = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API
263 "[^'+']+%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", name, s_hex);
264 if (match == 2) {
265 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
266 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
267 DBG("probe symbol %s", ev->attr.probe.symbol_name);
268 if (*s_hex == '\0') {
269 ERR("Invalid probe offset %s", s_hex);
270 ret = CMD_ERROR;
271 goto end;
272 }
273 ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
274 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
275 ev->attr.probe.addr = 0;
276 goto end;
277 }
278
279 /* Check for symbol */
280 if (isalpha(name[0])) {
281 match = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "s",
282 name);
283 if (match == 1) {
284 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
285 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
286 DBG("probe symbol %s", ev->attr.probe.symbol_name);
287 ev->attr.probe.offset = 0;
288 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
289 ev->attr.probe.addr = 0;
290 goto end;
291 }
292 }
293
294 /* Check for address */
295 match = sscanf(opt, "%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", s_hex);
296 if (match > 0) {
297 if (*s_hex == '\0') {
298 ERR("Invalid probe address %s", s_hex);
299 ret = CMD_ERROR;
300 goto end;
301 }
302 ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
303 DBG("probe addr %" PRIu64, ev->attr.probe.addr);
304 ev->attr.probe.offset = 0;
305 memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
306 goto end;
307 }
308
309 /* No match */
310 ret = CMD_ERROR;
311
312 end:
313 return ret;
314 }
315
316 /*
317 * Maps LOG4j loglevel from string to value
318 */
319 static int loglevel_log4j_str_to_value(const char *inputstr)
320 {
321 int i = 0;
322 char str[LTTNG_SYMBOL_NAME_LEN];
323
324 /*
325 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
326 * added at the end of the loop so a the upper bound we avoid the overflow.
327 */
328 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
329 str[i] = toupper(inputstr[i]);
330 i++;
331 }
332 str[i] = '\0';
333
334 if (!strcmp(str, "LOG4J_OFF") || !strcmp(str, "OFF")) {
335 return LTTNG_LOGLEVEL_LOG4J_OFF;
336 } else if (!strcmp(str, "LOG4J_FATAL") || !strcmp(str, "FATAL")) {
337 return LTTNG_LOGLEVEL_LOG4J_FATAL;
338 } else if (!strcmp(str, "LOG4J_ERROR") || !strcmp(str, "ERROR")) {
339 return LTTNG_LOGLEVEL_LOG4J_ERROR;
340 } else if (!strcmp(str, "LOG4J_WARN") || !strcmp(str, "WARN")) {
341 return LTTNG_LOGLEVEL_LOG4J_WARN;
342 } else if (!strcmp(str, "LOG4J_INFO") || !strcmp(str, "INFO")) {
343 return LTTNG_LOGLEVEL_LOG4J_INFO;
344 } else if (!strcmp(str, "LOG4J_DEBUG") || !strcmp(str, "DEBUG")) {
345 return LTTNG_LOGLEVEL_LOG4J_DEBUG;
346 } else if (!strcmp(str, "LOG4J_TRACE") || !strcmp(str, "TRACE")) {
347 return LTTNG_LOGLEVEL_LOG4J_TRACE;
348 } else if (!strcmp(str, "LOG4J_ALL") || !strcmp(str, "ALL")) {
349 return LTTNG_LOGLEVEL_LOG4J_ALL;
350 } else {
351 return -1;
352 }
353 }
354
355 /*
356 * Maps JUL loglevel from string to value
357 */
358 static int loglevel_jul_str_to_value(const char *inputstr)
359 {
360 int i = 0;
361 char str[LTTNG_SYMBOL_NAME_LEN];
362
363 /*
364 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
365 * added at the end of the loop so a the upper bound we avoid the overflow.
366 */
367 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
368 str[i] = toupper(inputstr[i]);
369 i++;
370 }
371 str[i] = '\0';
372
373 if (!strcmp(str, "JUL_OFF") || !strcmp(str, "OFF")) {
374 return LTTNG_LOGLEVEL_JUL_OFF;
375 } else if (!strcmp(str, "JUL_SEVERE") || !strcmp(str, "SEVERE")) {
376 return LTTNG_LOGLEVEL_JUL_SEVERE;
377 } else if (!strcmp(str, "JUL_WARNING") || !strcmp(str, "WARNING")) {
378 return LTTNG_LOGLEVEL_JUL_WARNING;
379 } else if (!strcmp(str, "JUL_INFO") || !strcmp(str, "INFO")) {
380 return LTTNG_LOGLEVEL_JUL_INFO;
381 } else if (!strcmp(str, "JUL_CONFIG") || !strcmp(str, "CONFIG")) {
382 return LTTNG_LOGLEVEL_JUL_CONFIG;
383 } else if (!strcmp(str, "JUL_FINE") || !strcmp(str, "FINE")) {
384 return LTTNG_LOGLEVEL_JUL_FINE;
385 } else if (!strcmp(str, "JUL_FINER") || !strcmp(str, "FINER")) {
386 return LTTNG_LOGLEVEL_JUL_FINER;
387 } else if (!strcmp(str, "JUL_FINEST") || !strcmp(str, "FINEST")) {
388 return LTTNG_LOGLEVEL_JUL_FINEST;
389 } else if (!strcmp(str, "JUL_ALL") || !strcmp(str, "ALL")) {
390 return LTTNG_LOGLEVEL_JUL_ALL;
391 } else {
392 return -1;
393 }
394 }
395
396 /*
397 * Maps loglevel from string to value
398 */
399 static
400 int loglevel_str_to_value(const char *inputstr)
401 {
402 int i = 0;
403 char str[LTTNG_SYMBOL_NAME_LEN];
404
405 /*
406 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
407 * added at the end of the loop so a the upper bound we avoid the overflow.
408 */
409 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
410 str[i] = toupper(inputstr[i]);
411 i++;
412 }
413 str[i] = '\0';
414 if (!strcmp(str, "TRACE_EMERG") || !strcmp(str, "EMERG")) {
415 return LTTNG_LOGLEVEL_EMERG;
416 } else if (!strcmp(str, "TRACE_ALERT") || !strcmp(str, "ALERT")) {
417 return LTTNG_LOGLEVEL_ALERT;
418 } else if (!strcmp(str, "TRACE_CRIT") || !strcmp(str, "CRIT")) {
419 return LTTNG_LOGLEVEL_CRIT;
420 } else if (!strcmp(str, "TRACE_ERR") || !strcmp(str, "ERR")) {
421 return LTTNG_LOGLEVEL_ERR;
422 } else if (!strcmp(str, "TRACE_WARNING") || !strcmp(str, "WARNING")) {
423 return LTTNG_LOGLEVEL_WARNING;
424 } else if (!strcmp(str, "TRACE_NOTICE") || !strcmp(str, "NOTICE")) {
425 return LTTNG_LOGLEVEL_NOTICE;
426 } else if (!strcmp(str, "TRACE_INFO") || !strcmp(str, "INFO")) {
427 return LTTNG_LOGLEVEL_INFO;
428 } else if (!strcmp(str, "TRACE_DEBUG_SYSTEM") || !strcmp(str, "DEBUG_SYSTEM") || !strcmp(str, "SYSTEM")) {
429 return LTTNG_LOGLEVEL_DEBUG_SYSTEM;
430 } else if (!strcmp(str, "TRACE_DEBUG_PROGRAM") || !strcmp(str, "DEBUG_PROGRAM") || !strcmp(str, "PROGRAM")) {
431 return LTTNG_LOGLEVEL_DEBUG_PROGRAM;
432 } else if (!strcmp(str, "TRACE_DEBUG_PROCESS") || !strcmp(str, "DEBUG_PROCESS") || !strcmp(str, "PROCESS")) {
433 return LTTNG_LOGLEVEL_DEBUG_PROCESS;
434 } else if (!strcmp(str, "TRACE_DEBUG_MODULE") || !strcmp(str, "DEBUG_MODULE") || !strcmp(str, "MODULE")) {
435 return LTTNG_LOGLEVEL_DEBUG_MODULE;
436 } else if (!strcmp(str, "TRACE_DEBUG_UNIT") || !strcmp(str, "DEBUG_UNIT") || !strcmp(str, "UNIT")) {
437 return LTTNG_LOGLEVEL_DEBUG_UNIT;
438 } else if (!strcmp(str, "TRACE_DEBUG_FUNCTION") || !strcmp(str, "DEBUG_FUNCTION") || !strcmp(str, "FUNCTION")) {
439 return LTTNG_LOGLEVEL_DEBUG_FUNCTION;
440 } else if (!strcmp(str, "TRACE_DEBUG_LINE") || !strcmp(str, "DEBUG_LINE") || !strcmp(str, "LINE")) {
441 return LTTNG_LOGLEVEL_DEBUG_LINE;
442 } else if (!strcmp(str, "TRACE_DEBUG") || !strcmp(str, "DEBUG")) {
443 return LTTNG_LOGLEVEL_DEBUG;
444 } else {
445 return -1;
446 }
447 }
448
449 static
450 const char *print_channel_name(const char *name)
451 {
452 return name ? : DEFAULT_CHANNEL_NAME;
453 }
454
455 static
456 const char *print_raw_channel_name(const char *name)
457 {
458 return name ? : "<default>";
459 }
460
461 /*
462 * Mi print exlcusion list
463 */
464 static
465 int mi_print_exclusion(int count, char **names)
466 {
467 int i, ret;
468
469 assert(writer);
470
471 if (count == 0) {
472 ret = 0;
473 goto end;
474 }
475 ret = mi_lttng_writer_open_element(writer, config_element_exclusions);
476 if (ret) {
477 goto end;
478 }
479
480 for (i = 0; i < count; i++) {
481 ret = mi_lttng_writer_write_element_string(writer,
482 config_element_exclusion, names[i]);
483 if (ret) {
484 goto end;
485 }
486 }
487
488 /* Close exclusions element */
489 ret = mi_lttng_writer_close_element(writer);
490
491 end:
492 return ret;
493 }
494
495 /*
496 * Return allocated string for pretty-printing exclusion names.
497 */
498 static
499 char *print_exclusions(int count, char **names)
500 {
501 int length = 0;
502 int i;
503 const char *preamble = " excluding ";
504 char *ret;
505
506 if (count == 0) {
507 return strdup("");
508 }
509
510 /* calculate total required length */
511 for (i = 0; i < count; i++) {
512 length += strlen(names[i]) + 1;
513 }
514
515 /* add length of preamble + one for NUL - one for last (missing) comma */
516 length += strlen(preamble);
517 ret = malloc(length);
518 strncpy(ret, preamble, length);
519 for (i = 0; i < count; i++) {
520 strcat(ret, names[i]);
521 if (i != count - 1) {
522 strcat(ret, ",");
523 }
524 }
525
526 return ret;
527 }
528
529 /*
530 * Compare list of exclusions against an event name.
531 * Return a list of legal exclusion names.
532 * Produce an error or a warning about others (depending on the situation)
533 */
534 static
535 int check_exclusion_subsets(const char *event_name,
536 const char *exclusions,
537 int *exclusion_count_ptr,
538 char ***exclusion_list_ptr)
539 {
540 const char *excluder_ptr;
541 const char *event_ptr;
542 const char *next_excluder;
543 int excluder_length;
544 int exclusion_count = 0;
545 char **exclusion_list = NULL;
546 int ret = CMD_SUCCESS;
547
548 if (event_name[strlen(event_name) - 1] != '*') {
549 ERR("Event %s: Excluders can only be used with wildcarded events", event_name);
550 goto error;
551 }
552
553 next_excluder = exclusions;
554 while (*next_excluder != 0) {
555 event_ptr = event_name;
556 excluder_ptr = next_excluder;
557 excluder_length = strcspn(next_excluder, ",");
558
559 /* Scan both the excluder and the event letter by letter */
560 while (1) {
561 char e, x;
562
563 e = *event_ptr;
564 x = *excluder_ptr;
565
566 if (x == '*') {
567 /* Event is a subset of the excluder */
568 ERR("Event %s: %.*s excludes all events from %s",
569 event_name,
570 excluder_length,
571 next_excluder,
572 event_name);
573 goto error;
574 }
575 if (e == '*') {
576 /* Excluder is a proper subset of event */
577 exclusion_count++;
578 exclusion_list = realloc(exclusion_list, sizeof(char **) * exclusion_count);
579 exclusion_list[exclusion_count - 1] = strndup(next_excluder, excluder_length);
580
581 break;
582 }
583 if (x != e) {
584 /* Excluder and event sets have no common elements */
585 WARN("Event %s: %.*s does not exclude any events from %s",
586 event_name,
587 excluder_length,
588 next_excluder,
589 event_name);
590 break;
591 }
592 excluder_ptr++;
593 event_ptr++;
594 }
595 /* next excluder */
596 next_excluder += excluder_length;
597 if (*next_excluder == ',') {
598 next_excluder++;
599 }
600 }
601 goto end;
602 error:
603 while (exclusion_count--) {
604 free(exclusion_list[exclusion_count]);
605 }
606 if (exclusion_list != NULL) {
607 free(exclusion_list);
608 }
609 exclusion_list = NULL;
610 exclusion_count = 0;
611 ret = CMD_ERROR;
612 end:
613 *exclusion_count_ptr = exclusion_count;
614 *exclusion_list_ptr = exclusion_list;
615 return ret;
616 }
617 /*
618 * Enabling event using the lttng API.
619 * Note: in case of error only the last error code will be return.
620 */
621 static int enable_events(char *session_name)
622 {
623 int ret = CMD_SUCCESS, command_ret = CMD_SUCCESS;
624 int error_holder = CMD_SUCCESS, warn = 0, error = 0, success = 1;
625 char *event_name, *channel_name = NULL;
626 struct lttng_event ev;
627 struct lttng_domain dom;
628 int exclusion_count = 0;
629 char **exclusion_list = NULL;
630
631 memset(&ev, 0, sizeof(ev));
632 memset(&dom, 0, sizeof(dom));
633
634 if (opt_kernel) {
635 if (opt_filter) {
636 ERR("Filter not implement for kernel tracing yet");
637 ret = CMD_ERROR;
638 goto error;
639 }
640 if (opt_loglevel) {
641 WARN("Kernel loglevels are not supported.");
642 }
643 }
644
645 /* Create lttng domain */
646 if (opt_kernel) {
647 dom.type = LTTNG_DOMAIN_KERNEL;
648 dom.buf_type = LTTNG_BUFFER_GLOBAL;
649 } else if (opt_userspace) {
650 dom.type = LTTNG_DOMAIN_UST;
651 /* Default. */
652 dom.buf_type = LTTNG_BUFFER_PER_UID;
653 } else if (opt_jul) {
654 dom.type = LTTNG_DOMAIN_JUL;
655 /* Default. */
656 dom.buf_type = LTTNG_BUFFER_PER_UID;
657 } else if (opt_log4j) {
658 dom.type = LTTNG_DOMAIN_LOG4J;
659 /* Default. */
660 dom.buf_type = LTTNG_BUFFER_PER_UID;
661 } else {
662 print_missing_domain();
663 ret = CMD_ERROR;
664 goto error;
665 }
666
667 if (opt_kernel && opt_exclude) {
668 ERR("Event name exclusions are not yet implemented for kernel events");
669 ret = CMD_ERROR;
670 goto error;
671 }
672
673 channel_name = opt_channel_name;
674
675 handle = lttng_create_handle(session_name, &dom);
676 if (handle == NULL) {
677 ret = -1;
678 goto error;
679 }
680
681 /* Prepare Mi */
682 if (lttng_opt_mi) {
683 /* Open a events element */
684 ret = mi_lttng_writer_open_element(writer, config_element_events);
685 if (ret) {
686 ret = CMD_ERROR;
687 goto error;
688 }
689 }
690
691 if (opt_enable_all) {
692 /* Default setup for enable all */
693 if (opt_kernel) {
694 ev.type = opt_event_type;
695 ev.name[0] = '\0';
696 /* kernel loglevels not implemented */
697 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
698 } else {
699 ev.type = LTTNG_EVENT_TRACEPOINT;
700 strcpy(ev.name, "*");
701 ev.loglevel_type = opt_loglevel_type;
702 if (opt_loglevel) {
703 assert(opt_userspace || opt_jul || opt_log4j);
704 if (opt_userspace) {
705 ev.loglevel = loglevel_str_to_value(opt_loglevel);
706 } else if (opt_jul) {
707 ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
708 } else if (opt_log4j) {
709 ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
710 }
711 if (ev.loglevel == -1) {
712 ERR("Unknown loglevel %s", opt_loglevel);
713 ret = -LTTNG_ERR_INVALID;
714 goto error;
715 }
716 } else {
717 assert(opt_userspace || opt_jul || opt_log4j);
718 if (opt_userspace) {
719 ev.loglevel = -1;
720 } else if (opt_jul || opt_log4j) {
721 ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
722 }
723 }
724 }
725
726 if (opt_exclude) {
727 ret = check_exclusion_subsets("*", opt_exclude,
728 &exclusion_count, &exclusion_list);
729 if (ret == CMD_ERROR) {
730 goto error;
731 }
732 ev.exclusion = 1;
733 }
734 if (!opt_filter) {
735 ret = lttng_enable_event_with_exclusions(handle,
736 &ev, channel_name,
737 NULL,
738 exclusion_count, exclusion_list);
739 if (ret < 0) {
740 switch (-ret) {
741 case LTTNG_ERR_KERN_EVENT_EXIST:
742 WARN("Kernel events already enabled (channel %s, session %s)",
743 print_channel_name(channel_name), session_name);
744 warn = 1;
745 break;
746 default:
747 ERR("Events: %s (channel %s, session %s)",
748 lttng_strerror(ret),
749 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
750 ? print_raw_channel_name(channel_name)
751 : print_channel_name(channel_name),
752 session_name);
753 error = 1;
754 break;
755 }
756 goto end;
757 }
758
759 switch (opt_event_type) {
760 case LTTNG_EVENT_TRACEPOINT:
761 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
762 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
763 MSG("All %s tracepoints%s are enabled in channel %s for loglevel %s",
764 get_domain_str(dom.type),
765 exclusion_string,
766 print_channel_name(channel_name),
767 opt_loglevel);
768 free(exclusion_string);
769 } else {
770 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
771 MSG("All %s tracepoints%s are enabled in channel %s",
772 get_domain_str(dom.type),
773 exclusion_string,
774 print_channel_name(channel_name));
775 free(exclusion_string);
776 }
777 break;
778 case LTTNG_EVENT_SYSCALL:
779 if (opt_kernel) {
780 MSG("All %s system calls are enabled in channel %s",
781 get_domain_str(dom.type),
782 print_channel_name(channel_name));
783 }
784 break;
785 case LTTNG_EVENT_ALL:
786 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
787 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
788 MSG("All %s events%s are enabled in channel %s for loglevel %s",
789 get_domain_str(dom.type),
790 exclusion_string,
791 print_channel_name(channel_name),
792 opt_loglevel);
793 free(exclusion_string);
794 } else {
795 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
796 MSG("All %s events%s are enabled in channel %s",
797 get_domain_str(dom.type),
798 exclusion_string,
799 print_channel_name(channel_name));
800 free(exclusion_string);
801 }
802 break;
803 default:
804 /*
805 * We should not be here since lttng_enable_event should have
806 * failed on the event type.
807 */
808 goto error;
809 }
810 }
811
812 if (opt_filter) {
813 command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
814 opt_filter, exclusion_count, exclusion_list);
815 if (command_ret < 0) {
816 switch (-command_ret) {
817 case LTTNG_ERR_FILTER_EXIST:
818 WARN("Filter on all events is already enabled"
819 " (channel %s, session %s)",
820 print_channel_name(channel_name), session_name);
821 warn = 1;
822 break;
823 default:
824 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
825 lttng_strerror(command_ret),
826 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
827 ? print_raw_channel_name(channel_name)
828 : print_channel_name(channel_name),
829 session_name, opt_filter);
830 error = 1;
831 break;
832 }
833 error_holder = command_ret;
834 } else {
835 ev.filter = 1;
836 MSG("Filter '%s' successfully set", opt_filter);
837 }
838 }
839
840 if (lttng_opt_mi) {
841 /* The wildcard * is used for kernel and ust domain to
842 * represent ALL. We copy * in event name to force the wildcard use
843 * for kernel domain
844 *
845 * Note: this is strictly for semantic and printing while in
846 * machine interface mode.
847 */
848 strcpy(ev.name, "*");
849
850 /* If we reach here the events are enabled */
851 if (!error && !warn) {
852 ev.enabled = 1;
853 } else {
854 ev.enabled = 0;
855 success = 0;
856 }
857 ret = mi_lttng_event(writer, &ev, 1);
858 if (ret) {
859 ret = CMD_ERROR;
860 goto error;
861 }
862
863 /* print exclusion */
864 ret = mi_print_exclusion(exclusion_count, exclusion_list);
865 if (ret) {
866 ret = CMD_ERROR;
867 goto error;
868 }
869
870 /* Success ? */
871 ret = mi_lttng_writer_write_element_bool(writer,
872 mi_lttng_element_command_success, success);
873 if (ret) {
874 ret = CMD_ERROR;
875 goto error;
876 }
877
878 /* Close event element */
879 ret = mi_lttng_writer_close_element(writer);
880 if (ret) {
881 ret = CMD_ERROR;
882 goto error;
883 }
884 }
885
886 goto end;
887 }
888
889 /* Strip event list */
890 event_name = strtok(opt_event_list, ",");
891 while (event_name != NULL) {
892 /* Copy name and type of the event */
893 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
894 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
895 ev.type = opt_event_type;
896
897 /* Kernel tracer action */
898 if (opt_kernel) {
899 DBG("Enabling kernel event %s for channel %s",
900 event_name,
901 print_channel_name(channel_name));
902
903 switch (opt_event_type) {
904 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
905 ev.type = LTTNG_EVENT_TRACEPOINT;
906 /* Fall-through */
907 case LTTNG_EVENT_TRACEPOINT:
908 break;
909 case LTTNG_EVENT_PROBE:
910 ret = parse_probe_opts(&ev, opt_probe);
911 if (ret) {
912 ERR("Unable to parse probe options");
913 ret = 0;
914 goto error;
915 }
916 break;
917 case LTTNG_EVENT_FUNCTION:
918 ret = parse_probe_opts(&ev, opt_function);
919 if (ret) {
920 ERR("Unable to parse function probe options");
921 ret = 0;
922 goto error;
923 }
924 break;
925 case LTTNG_EVENT_FUNCTION_ENTRY:
926 strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
927 LTTNG_SYMBOL_NAME_LEN);
928 ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
929 break;
930 case LTTNG_EVENT_SYSCALL:
931 ev.type = LTTNG_EVENT_SYSCALL;
932 break;
933 default:
934 ret = CMD_UNDEFINED;
935 goto error;
936 }
937
938 /* kernel loglevels not implemented */
939 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
940 } else if (opt_userspace) { /* User-space tracer action */
941 #if 0
942 if (opt_cmd_name != NULL || opt_pid) {
943 MSG("Only supporting tracing all UST processes (-u) for now.");
944 ret = CMD_UNDEFINED;
945 goto error;
946 }
947 #endif
948
949 DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
950 print_channel_name(channel_name), opt_loglevel ? : "<all>");
951
952 switch (opt_event_type) {
953 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
954 /* Fall-through */
955 case LTTNG_EVENT_TRACEPOINT:
956 /* Copy name and type of the event */
957 ev.type = LTTNG_EVENT_TRACEPOINT;
958 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
959 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
960 break;
961 case LTTNG_EVENT_PROBE:
962 case LTTNG_EVENT_FUNCTION:
963 case LTTNG_EVENT_FUNCTION_ENTRY:
964 case LTTNG_EVENT_SYSCALL:
965 default:
966 ERR("Event type not available for user-space tracing");
967 ret = CMD_UNSUPPORTED;
968 goto error;
969 }
970
971 if (opt_exclude) {
972 ev.exclusion = 1;
973 if (opt_event_type != LTTNG_EVENT_ALL && opt_event_type != LTTNG_EVENT_TRACEPOINT) {
974 ERR("Exclusion option can only be used with tracepoint events");
975 ret = CMD_ERROR;
976 goto error;
977 }
978 /* Free previously allocated items */
979 if (exclusion_list != NULL) {
980 while (exclusion_count--) {
981 free(exclusion_list[exclusion_count]);
982 }
983 free(exclusion_list);
984 exclusion_list = NULL;
985 }
986 /* Check for proper subsets */
987 ret = check_exclusion_subsets(event_name, opt_exclude,
988 &exclusion_count, &exclusion_list);
989 if (ret == CMD_ERROR) {
990 goto error;
991 }
992 }
993
994 ev.loglevel_type = opt_loglevel_type;
995 if (opt_loglevel) {
996 ev.loglevel = loglevel_str_to_value(opt_loglevel);
997 if (ev.loglevel == -1) {
998 ERR("Unknown loglevel %s", opt_loglevel);
999 ret = -LTTNG_ERR_INVALID;
1000 goto error;
1001 }
1002 } else {
1003 ev.loglevel = -1;
1004 }
1005 } else if (opt_jul || opt_log4j) {
1006 if (opt_event_type != LTTNG_EVENT_ALL &&
1007 opt_event_type != LTTNG_EVENT_TRACEPOINT) {
1008 ERR("Event type not supported for domain.");
1009 ret = CMD_UNSUPPORTED;
1010 goto error;
1011 }
1012
1013 ev.loglevel_type = opt_loglevel_type;
1014 if (opt_loglevel) {
1015 if (opt_jul) {
1016 ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
1017 } else if (opt_log4j) {
1018 ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
1019 }
1020 if (ev.loglevel == -1) {
1021 ERR("Unknown loglevel %s", opt_loglevel);
1022 ret = -LTTNG_ERR_INVALID;
1023 goto error;
1024 }
1025 } else {
1026 if (opt_jul) {
1027 ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
1028 } else if (opt_log4j) {
1029 ev.loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
1030 }
1031 }
1032 ev.type = LTTNG_EVENT_TRACEPOINT;
1033 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
1034 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
1035 } else {
1036 print_missing_domain();
1037 ret = CMD_ERROR;
1038 goto error;
1039 }
1040
1041 if (!opt_filter) {
1042 char *exclusion_string;
1043
1044 command_ret = lttng_enable_event_with_exclusions(handle,
1045 &ev, channel_name,
1046 NULL, exclusion_count, exclusion_list);
1047 exclusion_string = print_exclusions(exclusion_count, exclusion_list);
1048 if (command_ret < 0) {
1049 /* Turn ret to positive value to handle the positive error code */
1050 switch (-command_ret) {
1051 case LTTNG_ERR_KERN_EVENT_EXIST:
1052 WARN("Kernel event %s%s already enabled (channel %s, session %s)",
1053 event_name,
1054 exclusion_string,
1055 print_channel_name(channel_name), session_name);
1056 warn = 1;
1057 break;
1058 default:
1059 ERR("Event %s%s: %s (channel %s, session %s)", event_name,
1060 exclusion_string,
1061 lttng_strerror(command_ret),
1062 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
1063 ? print_raw_channel_name(channel_name)
1064 : print_channel_name(channel_name),
1065 session_name);
1066 error = 1;
1067 break;
1068 }
1069 error_holder = command_ret;
1070 } else {
1071 /* So we don't print the default channel name for agent domain. */
1072 if (dom.type == LTTNG_DOMAIN_JUL ||
1073 dom.type == LTTNG_DOMAIN_LOG4J) {
1074 MSG("%s event %s%s enabled.",
1075 get_domain_str(dom.type), event_name,
1076 exclusion_string);
1077 } else {
1078 MSG("%s event %s%s created in channel %s",
1079 get_domain_str(dom.type), event_name,
1080 exclusion_string,
1081 print_channel_name(channel_name));
1082 }
1083 }
1084 free(exclusion_string);
1085 }
1086
1087 if (opt_filter) {
1088 char *exclusion_string;
1089
1090 /* Filter present */
1091 ev.filter = 1;
1092
1093 command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
1094 opt_filter, exclusion_count, exclusion_list);
1095 exclusion_string = print_exclusions(exclusion_count, exclusion_list);
1096
1097 if (command_ret < 0) {
1098 switch (-command_ret) {
1099 case LTTNG_ERR_FILTER_EXIST:
1100 WARN("Filter on event %s%s is already enabled"
1101 " (channel %s, session %s)",
1102 event_name,
1103 exclusion_string,
1104 print_channel_name(channel_name), session_name);
1105 warn = 1;
1106 break;
1107 default:
1108 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
1109 exclusion_string,
1110 lttng_strerror(command_ret),
1111 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
1112 ? print_raw_channel_name(channel_name)
1113 : print_channel_name(channel_name),
1114 session_name, opt_filter);
1115 error = 1;
1116 break;
1117 }
1118 error_holder = command_ret;
1119
1120 } else {
1121 MSG("Event %s%s: Filter '%s' successfully set",
1122 event_name, exclusion_string,
1123 opt_filter);
1124 }
1125 free(exclusion_string);
1126 }
1127
1128 if (lttng_opt_mi) {
1129 if (command_ret) {
1130 success = 0;
1131 ev.enabled = 0;
1132 } else {
1133 ev.enabled = 1;
1134 }
1135
1136 ret = mi_lttng_event(writer, &ev, 1);
1137 if (ret) {
1138 ret = CMD_ERROR;
1139 goto error;
1140 }
1141
1142 /* print exclusion */
1143 ret = mi_print_exclusion(exclusion_count, exclusion_list);
1144 if (ret) {
1145 ret = CMD_ERROR;
1146 goto error;
1147 }
1148
1149 /* Success ? */
1150 ret = mi_lttng_writer_write_element_bool(writer,
1151 mi_lttng_element_command_success, success);
1152 if (ret) {
1153 ret = CMD_ERROR;
1154 goto end;
1155 }
1156
1157 /* Close event element */
1158 ret = mi_lttng_writer_close_element(writer);
1159 if (ret) {
1160 ret = CMD_ERROR;
1161 goto end;
1162 }
1163 }
1164
1165 /* Next event */
1166 event_name = strtok(NULL, ",");
1167 /* Reset warn, error and success */
1168 success = 1;
1169 }
1170
1171 end:
1172 /* Close Mi */
1173 if (lttng_opt_mi) {
1174 /* Close events element */
1175 ret = mi_lttng_writer_close_element(writer);
1176 if (ret) {
1177 ret = CMD_ERROR;
1178 goto error;
1179 }
1180 }
1181 error:
1182 if (warn) {
1183 ret = CMD_WARNING;
1184 }
1185 if (error) {
1186 ret = CMD_ERROR;
1187 }
1188 lttng_destroy_handle(handle);
1189
1190 if (exclusion_list != NULL) {
1191 while (exclusion_count--) {
1192 free(exclusion_list[exclusion_count]);
1193 }
1194 free(exclusion_list);
1195 }
1196
1197 /* Overwrite ret with error_holder if there was an actual error with
1198 * enabling an event.
1199 */
1200 ret = error_holder ? error_holder : ret;
1201
1202 return ret;
1203 }
1204
1205 /*
1206 * Add event to trace session
1207 */
1208 int cmd_enable_events(int argc, const char **argv)
1209 {
1210 int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
1211 static poptContext pc;
1212 char *session_name = NULL;
1213 int event_type = -1;
1214
1215 pc = poptGetContext(NULL, argc, argv, long_options, 0);
1216 poptReadDefaultConfig(pc, 0);
1217
1218 /* Default event type */
1219 opt_event_type = LTTNG_EVENT_ALL;
1220
1221 while ((opt = poptGetNextOpt(pc)) != -1) {
1222 switch (opt) {
1223 case OPT_HELP:
1224 usage(stdout);
1225 goto end;
1226 case OPT_TRACEPOINT:
1227 opt_event_type = LTTNG_EVENT_TRACEPOINT;
1228 break;
1229 case OPT_PROBE:
1230 opt_event_type = LTTNG_EVENT_PROBE;
1231 break;
1232 case OPT_FUNCTION:
1233 opt_event_type = LTTNG_EVENT_FUNCTION;
1234 break;
1235 case OPT_FUNCTION_ENTRY:
1236 opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
1237 break;
1238 case OPT_SYSCALL:
1239 opt_event_type = LTTNG_EVENT_SYSCALL;
1240 break;
1241 case OPT_USERSPACE:
1242 opt_userspace = 1;
1243 break;
1244 case OPT_LOGLEVEL:
1245 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
1246 opt_loglevel = poptGetOptArg(pc);
1247 break;
1248 case OPT_LOGLEVEL_ONLY:
1249 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
1250 opt_loglevel = poptGetOptArg(pc);
1251 break;
1252 case OPT_LIST_OPTIONS:
1253 list_cmd_options(stdout, long_options);
1254 goto end;
1255 case OPT_FILTER:
1256 break;
1257 case OPT_EXCLUDE:
1258 break;
1259 default:
1260 usage(stderr);
1261 ret = CMD_UNDEFINED;
1262 goto end;
1263 }
1264
1265 /* Validate event type. Multiple event type are not supported. */
1266 if (event_type == -1) {
1267 event_type = opt_event_type;
1268 } else {
1269 if (event_type != opt_event_type) {
1270 ERR("Multiple event type not supported.");
1271 ret = CMD_ERROR;
1272 goto end;
1273 }
1274 }
1275 }
1276
1277 /* Mi check */
1278 if (lttng_opt_mi) {
1279 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
1280 if (!writer) {
1281 ret = -LTTNG_ERR_NOMEM;
1282 goto end;
1283 }
1284
1285 /* Open command element */
1286 ret = mi_lttng_writer_command_open(writer,
1287 mi_lttng_element_command_enable_event);
1288 if (ret) {
1289 ret = CMD_ERROR;
1290 goto end;
1291 }
1292
1293 /* Open output element */
1294 ret = mi_lttng_writer_open_element(writer,
1295 mi_lttng_element_command_output);
1296 if (ret) {
1297 ret = CMD_ERROR;
1298 goto end;
1299 }
1300 }
1301
1302 opt_event_list = (char*) poptGetArg(pc);
1303 if (opt_event_list == NULL && opt_enable_all == 0) {
1304 ERR("Missing event name(s).\n");
1305 usage(stderr);
1306 ret = CMD_ERROR;
1307 goto end;
1308 }
1309
1310 if (!opt_session_name) {
1311 session_name = get_session_name();
1312 if (session_name == NULL) {
1313 command_ret = CMD_ERROR;
1314 success = 0;
1315 goto mi_closing;
1316 }
1317 } else {
1318 session_name = opt_session_name;
1319 }
1320
1321 command_ret = enable_events(session_name);
1322 if (command_ret) {
1323 success = 0;
1324 goto mi_closing;
1325 }
1326
1327 mi_closing:
1328 /* Mi closing */
1329 if (lttng_opt_mi) {
1330 /* Close output element */
1331 ret = mi_lttng_writer_close_element(writer);
1332 if (ret) {
1333 ret = CMD_ERROR;
1334 goto end;
1335 }
1336
1337 ret = mi_lttng_writer_write_element_bool(writer,
1338 mi_lttng_element_command_success, success);
1339 if (ret) {
1340 ret = CMD_ERROR;
1341 goto end;
1342 }
1343
1344 /* Command element close */
1345 ret = mi_lttng_writer_command_close(writer);
1346 if (ret) {
1347 ret = CMD_ERROR;
1348 goto end;
1349 }
1350 }
1351
1352 end:
1353 /* Mi clean-up */
1354 if (writer && mi_lttng_writer_destroy(writer)) {
1355 /* Preserve original error code */
1356 ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
1357 }
1358
1359 if (opt_session_name == NULL) {
1360 free(session_name);
1361 }
1362
1363 /* Overwrite ret if an error occurred in enable_events */
1364 ret = command_ret ? command_ret : ret;
1365
1366 poptFreeContext(pc);
1367 return ret;
1368 }
LTTng tools - Deliverables
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