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Adding log4j agent support
[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;
251 char s_hex[19];
252 #define S_HEX_LEN_SCANF_IS_A_BROKEN_API "18" /* 18 is (19 - 1) (\0 is extra) */
253 char name[LTTNG_SYMBOL_NAME_LEN];
254
255 if (opt == NULL) {
256 ret = -1;
257 goto end;
258 }
259
260 /* Check for symbol+offset */
261 ret = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API
262 "[^'+']+%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", name, s_hex);
263 if (ret == 2) {
264 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
265 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
266 DBG("probe symbol %s", ev->attr.probe.symbol_name);
267 if (*s_hex == '\0') {
268 ERR("Invalid probe offset %s", s_hex);
269 ret = -1;
270 goto end;
271 }
272 ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
273 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
274 ev->attr.probe.addr = 0;
275 goto end;
276 }
277
278 /* Check for symbol */
279 if (isalpha(name[0])) {
280 ret = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "s",
281 name);
282 if (ret == 1) {
283 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
284 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
285 DBG("probe symbol %s", ev->attr.probe.symbol_name);
286 ev->attr.probe.offset = 0;
287 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
288 ev->attr.probe.addr = 0;
289 goto end;
290 }
291 }
292
293 /* Check for address */
294 ret = sscanf(opt, "%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", s_hex);
295 if (ret > 0) {
296 if (*s_hex == '\0') {
297 ERR("Invalid probe address %s", s_hex);
298 ret = -1;
299 goto end;
300 }
301 ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
302 DBG("probe addr %" PRIu64, ev->attr.probe.addr);
303 ev->attr.probe.offset = 0;
304 memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
305 goto end;
306 }
307
308 /* No match */
309 ret = -1;
310
311 end:
312 return ret;
313 }
314
315 /*
316 * Maps LOG4j loglevel from string to value
317 */
318 static int loglevel_log4j_str_to_value(const char *inputstr)
319 {
320 int i = 0;
321 char str[LTTNG_SYMBOL_NAME_LEN];
322
323 /*
324 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
325 * added at the end of the loop so a the upper bound we avoid the overflow.
326 */
327 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
328 str[i] = toupper(inputstr[i]);
329 i++;
330 }
331 str[i] = '\0';
332
333 if (!strcmp(str, "LOG4J_OFF") || !strcmp(str, "OFF")) {
334 return LTTNG_LOGLEVEL_LOG4J_OFF;
335 } else if (!strcmp(str, "LOG4J_FATAL") || !strcmp(str, "FATAL")) {
336 return LTTNG_LOGLEVEL_LOG4J_FATAL;
337 } else if (!strcmp(str, "LOG4J_ERROR") || !strcmp(str, "ERROR")) {
338 return LTTNG_LOGLEVEL_LOG4J_ERROR;
339 } else if (!strcmp(str, "LOG4J_WARN") || !strcmp(str, "WARN")) {
340 return LTTNG_LOGLEVEL_LOG4J_WARN;
341 } else if (!strcmp(str, "LOG4J_INFO") || !strcmp(str, "INFO")) {
342 return LTTNG_LOGLEVEL_LOG4J_INFO;
343 } else if (!strcmp(str, "LOG4J_DEBUG") || !strcmp(str, "DEBUG")) {
344 return LTTNG_LOGLEVEL_LOG4J_DEBUG;
345 } else if (!strcmp(str, "LOG4J_TRACE") || !strcmp(str, "TRACE")) {
346 return LTTNG_LOGLEVEL_LOG4J_TRACE;
347 } else if (!strcmp(str, "LOG4J_ALL") || !strcmp(str, "ALL")) {
348 return LTTNG_LOGLEVEL_LOG4J_ALL;
349 } else {
350 return -1;
351 }
352 }
353
354 /*
355 * Maps JUL loglevel from string to value
356 */
357 static int loglevel_jul_str_to_value(const char *inputstr)
358 {
359 int i = 0;
360 char str[LTTNG_SYMBOL_NAME_LEN];
361
362 /*
363 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
364 * added at the end of the loop so a the upper bound we avoid the overflow.
365 */
366 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
367 str[i] = toupper(inputstr[i]);
368 i++;
369 }
370 str[i] = '\0';
371
372 if (!strcmp(str, "JUL_OFF") || !strcmp(str, "OFF")) {
373 return LTTNG_LOGLEVEL_JUL_OFF;
374 } else if (!strcmp(str, "JUL_SEVERE") || !strcmp(str, "SEVERE")) {
375 return LTTNG_LOGLEVEL_JUL_SEVERE;
376 } else if (!strcmp(str, "JUL_WARNING") || !strcmp(str, "WARNING")) {
377 return LTTNG_LOGLEVEL_JUL_WARNING;
378 } else if (!strcmp(str, "JUL_INFO") || !strcmp(str, "INFO")) {
379 return LTTNG_LOGLEVEL_JUL_INFO;
380 } else if (!strcmp(str, "JUL_CONFIG") || !strcmp(str, "CONFIG")) {
381 return LTTNG_LOGLEVEL_JUL_CONFIG;
382 } else if (!strcmp(str, "JUL_FINE") || !strcmp(str, "FINE")) {
383 return LTTNG_LOGLEVEL_JUL_FINE;
384 } else if (!strcmp(str, "JUL_FINER") || !strcmp(str, "FINER")) {
385 return LTTNG_LOGLEVEL_JUL_FINER;
386 } else if (!strcmp(str, "JUL_FINEST") || !strcmp(str, "FINEST")) {
387 return LTTNG_LOGLEVEL_JUL_FINEST;
388 } else if (!strcmp(str, "JUL_ALL") || !strcmp(str, "ALL")) {
389 return LTTNG_LOGLEVEL_JUL_ALL;
390 } else {
391 return -1;
392 }
393 }
394
395 /*
396 * Maps loglevel from string to value
397 */
398 static
399 int loglevel_str_to_value(const char *inputstr)
400 {
401 int i = 0;
402 char str[LTTNG_SYMBOL_NAME_LEN];
403
404 /*
405 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
406 * added at the end of the loop so a the upper bound we avoid the overflow.
407 */
408 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
409 str[i] = toupper(inputstr[i]);
410 i++;
411 }
412 str[i] = '\0';
413 if (!strcmp(str, "TRACE_EMERG") || !strcmp(str, "EMERG")) {
414 return LTTNG_LOGLEVEL_EMERG;
415 } else if (!strcmp(str, "TRACE_ALERT") || !strcmp(str, "ALERT")) {
416 return LTTNG_LOGLEVEL_ALERT;
417 } else if (!strcmp(str, "TRACE_CRIT") || !strcmp(str, "CRIT")) {
418 return LTTNG_LOGLEVEL_CRIT;
419 } else if (!strcmp(str, "TRACE_ERR") || !strcmp(str, "ERR")) {
420 return LTTNG_LOGLEVEL_ERR;
421 } else if (!strcmp(str, "TRACE_WARNING") || !strcmp(str, "WARNING")) {
422 return LTTNG_LOGLEVEL_WARNING;
423 } else if (!strcmp(str, "TRACE_NOTICE") || !strcmp(str, "NOTICE")) {
424 return LTTNG_LOGLEVEL_NOTICE;
425 } else if (!strcmp(str, "TRACE_INFO") || !strcmp(str, "INFO")) {
426 return LTTNG_LOGLEVEL_INFO;
427 } else if (!strcmp(str, "TRACE_DEBUG_SYSTEM") || !strcmp(str, "DEBUG_SYSTEM") || !strcmp(str, "SYSTEM")) {
428 return LTTNG_LOGLEVEL_DEBUG_SYSTEM;
429 } else if (!strcmp(str, "TRACE_DEBUG_PROGRAM") || !strcmp(str, "DEBUG_PROGRAM") || !strcmp(str, "PROGRAM")) {
430 return LTTNG_LOGLEVEL_DEBUG_PROGRAM;
431 } else if (!strcmp(str, "TRACE_DEBUG_PROCESS") || !strcmp(str, "DEBUG_PROCESS") || !strcmp(str, "PROCESS")) {
432 return LTTNG_LOGLEVEL_DEBUG_PROCESS;
433 } else if (!strcmp(str, "TRACE_DEBUG_MODULE") || !strcmp(str, "DEBUG_MODULE") || !strcmp(str, "MODULE")) {
434 return LTTNG_LOGLEVEL_DEBUG_MODULE;
435 } else if (!strcmp(str, "TRACE_DEBUG_UNIT") || !strcmp(str, "DEBUG_UNIT") || !strcmp(str, "UNIT")) {
436 return LTTNG_LOGLEVEL_DEBUG_UNIT;
437 } else if (!strcmp(str, "TRACE_DEBUG_FUNCTION") || !strcmp(str, "DEBUG_FUNCTION") || !strcmp(str, "FUNCTION")) {
438 return LTTNG_LOGLEVEL_DEBUG_FUNCTION;
439 } else if (!strcmp(str, "TRACE_DEBUG_LINE") || !strcmp(str, "DEBUG_LINE") || !strcmp(str, "LINE")) {
440 return LTTNG_LOGLEVEL_DEBUG_LINE;
441 } else if (!strcmp(str, "TRACE_DEBUG") || !strcmp(str, "DEBUG")) {
442 return LTTNG_LOGLEVEL_DEBUG;
443 } else {
444 return -1;
445 }
446 }
447
448 static
449 const char *print_channel_name(const char *name)
450 {
451 return name ? : DEFAULT_CHANNEL_NAME;
452 }
453
454 static
455 const char *print_raw_channel_name(const char *name)
456 {
457 return name ? : "<default>";
458 }
459
460 /*
461 * Mi print exlcusion list
462 */
463 static
464 int mi_print_exclusion(int count, char **names)
465 {
466 int i, ret;
467
468 assert(writer);
469
470 if (count == 0) {
471 ret = 0;
472 goto end;
473 }
474 ret = mi_lttng_writer_open_element(writer, config_element_exclusions);
475 if (ret) {
476 goto end;
477 }
478
479 for (i = 0; i < count; i++) {
480 ret = mi_lttng_writer_write_element_string(writer,
481 config_element_exclusion, names[i]);
482 if (ret) {
483 goto end;
484 }
485 }
486
487 /* Close exclusions element */
488 ret = mi_lttng_writer_close_element(writer);
489
490 end:
491 return ret;
492 }
493
494 /*
495 * Return allocated string for pretty-printing exclusion names.
496 */
497 static
498 char *print_exclusions(int count, char **names)
499 {
500 int length = 0;
501 int i;
502 const char *preamble = " excluding ";
503 char *ret;
504
505 if (count == 0) {
506 return strdup("");
507 }
508
509 /* calculate total required length */
510 for (i = 0; i < count; i++) {
511 length += strlen(names[i]) + 1;
512 }
513
514 /* add length of preamble + one for NUL - one for last (missing) comma */
515 length += strlen(preamble);
516 ret = malloc(length);
517 strncpy(ret, preamble, length);
518 for (i = 0; i < count; i++) {
519 strcat(ret, names[i]);
520 if (i != count - 1) {
521 strcat(ret, ",");
522 }
523 }
524
525 return ret;
526 }
527
528 /*
529 * Compare list of exclusions against an event name.
530 * Return a list of legal exclusion names.
531 * Produce an error or a warning about others (depending on the situation)
532 */
533 static
534 int check_exclusion_subsets(const char *event_name,
535 const char *exclusions,
536 int *exclusion_count_ptr,
537 char ***exclusion_list_ptr)
538 {
539 const char *excluder_ptr;
540 const char *event_ptr;
541 const char *next_excluder;
542 int excluder_length;
543 int exclusion_count = 0;
544 char **exclusion_list = NULL;
545 int ret = CMD_SUCCESS;
546
547 if (event_name[strlen(event_name) - 1] != '*') {
548 ERR("Event %s: Excluders can only be used with wildcarded events", event_name);
549 goto error;
550 }
551
552 next_excluder = exclusions;
553 while (*next_excluder != 0) {
554 event_ptr = event_name;
555 excluder_ptr = next_excluder;
556 excluder_length = strcspn(next_excluder, ",");
557
558 /* Scan both the excluder and the event letter by letter */
559 while (1) {
560 char e, x;
561
562 e = *event_ptr;
563 x = *excluder_ptr;
564
565 if (x == '*') {
566 /* Event is a subset of the excluder */
567 ERR("Event %s: %.*s excludes all events from %s",
568 event_name,
569 excluder_length,
570 next_excluder,
571 event_name);
572 goto error;
573 }
574 if (e == '*') {
575 /* Excluder is a proper subset of event */
576 exclusion_count++;
577 exclusion_list = realloc(exclusion_list, sizeof(char **) * exclusion_count);
578 exclusion_list[exclusion_count - 1] = strndup(next_excluder, excluder_length);
579
580 break;
581 }
582 if (x != e) {
583 /* Excluder and event sets have no common elements */
584 WARN("Event %s: %.*s does not exclude any events from %s",
585 event_name,
586 excluder_length,
587 next_excluder,
588 event_name);
589 break;
590 }
591 excluder_ptr++;
592 event_ptr++;
593 }
594 /* next excluder */
595 next_excluder += excluder_length;
596 if (*next_excluder == ',') {
597 next_excluder++;
598 }
599 }
600 goto end;
601 error:
602 while (exclusion_count--) {
603 free(exclusion_list[exclusion_count]);
604 }
605 if (exclusion_list != NULL) {
606 free(exclusion_list);
607 }
608 exclusion_list = NULL;
609 exclusion_count = 0;
610 ret = CMD_ERROR;
611 end:
612 *exclusion_count_ptr = exclusion_count;
613 *exclusion_list_ptr = exclusion_list;
614 return ret;
615 }
616 /*
617 * Enabling event using the lttng API.
618 * Note: in case of error only the last error code will be return.
619 */
620 static int enable_events(char *session_name)
621 {
622 int ret = CMD_SUCCESS, command_ret = CMD_SUCCESS;
623 int error_holder = CMD_SUCCESS, warn = 0, error = 0, success = 1;
624 char *event_name, *channel_name = NULL;
625 struct lttng_event ev;
626 struct lttng_domain dom;
627 int exclusion_count = 0;
628 char **exclusion_list = NULL;
629
630 memset(&ev, 0, sizeof(ev));
631 memset(&dom, 0, sizeof(dom));
632
633 if (opt_kernel) {
634 if (opt_filter) {
635 ERR("Filter not implement for kernel tracing yet");
636 ret = CMD_ERROR;
637 goto error;
638 }
639 if (opt_loglevel) {
640 WARN("Kernel loglevels are not supported.");
641 }
642 }
643
644 /* Create lttng domain */
645 if (opt_kernel) {
646 dom.type = LTTNG_DOMAIN_KERNEL;
647 dom.buf_type = LTTNG_BUFFER_GLOBAL;
648 } else if (opt_userspace) {
649 dom.type = LTTNG_DOMAIN_UST;
650 /* Default. */
651 dom.buf_type = LTTNG_BUFFER_PER_UID;
652 } else if (opt_jul) {
653 dom.type = LTTNG_DOMAIN_JUL;
654 /* Default. */
655 dom.buf_type = LTTNG_BUFFER_PER_UID;
656 } else if (opt_log4j) {
657 dom.type = LTTNG_DOMAIN_LOG4J;
658 /* Default. */
659 dom.buf_type = LTTNG_BUFFER_PER_UID;
660 } else {
661 print_missing_domain();
662 ret = CMD_ERROR;
663 goto error;
664 }
665
666 if (opt_kernel && opt_exclude) {
667 ERR("Event name exclusions are not yet implemented for kernel events");
668 ret = CMD_ERROR;
669 goto error;
670 }
671
672 channel_name = opt_channel_name;
673
674 handle = lttng_create_handle(session_name, &dom);
675 if (handle == NULL) {
676 ret = -1;
677 goto error;
678 }
679
680 /* Prepare Mi */
681 if (lttng_opt_mi) {
682 /* Open a events element */
683 ret = mi_lttng_writer_open_element(writer, config_element_events);
684 if (ret) {
685 ret = CMD_ERROR;
686 goto error;
687 }
688 }
689
690 if (opt_enable_all) {
691 /* Default setup for enable all */
692 if (opt_kernel) {
693 ev.type = opt_event_type;
694 ev.name[0] = '\0';
695 /* kernel loglevels not implemented */
696 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
697 } else {
698 ev.type = LTTNG_EVENT_TRACEPOINT;
699 strcpy(ev.name, "*");
700 ev.loglevel_type = opt_loglevel_type;
701 if (opt_loglevel) {
702 assert(opt_userspace || opt_jul || opt_log4j);
703 if (opt_userspace) {
704 ev.loglevel = loglevel_str_to_value(opt_loglevel);
705 } else if (opt_jul) {
706 ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
707 } else if (opt_log4j) {
708 ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
709 }
710 if (ev.loglevel == -1) {
711 ERR("Unknown loglevel %s", opt_loglevel);
712 ret = -LTTNG_ERR_INVALID;
713 goto error;
714 }
715 } else {
716 assert(opt_userspace || opt_jul || opt_log4j);
717 if (opt_userspace) {
718 ev.loglevel = -1;
719 } else if (opt_jul || opt_log4j) {
720 ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
721 }
722 }
723 }
724
725 if (opt_exclude) {
726 ret = check_exclusion_subsets("*", opt_exclude,
727 &exclusion_count, &exclusion_list);
728 if (ret == CMD_ERROR) {
729 goto error;
730 }
731 ev.exclusion = 1;
732 }
733 if (!opt_filter) {
734 ret = lttng_enable_event_with_exclusions(handle,
735 &ev, channel_name,
736 NULL,
737 exclusion_count, exclusion_list);
738 if (ret < 0) {
739 switch (-ret) {
740 case LTTNG_ERR_KERN_EVENT_EXIST:
741 WARN("Kernel events already enabled (channel %s, session %s)",
742 print_channel_name(channel_name), session_name);
743 warn = 1;
744 break;
745 default:
746 ERR("Events: %s (channel %s, session %s)",
747 lttng_strerror(ret),
748 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
749 ? print_raw_channel_name(channel_name)
750 : print_channel_name(channel_name),
751 session_name);
752 error = 1;
753 break;
754 }
755 goto end;
756 }
757
758 switch (opt_event_type) {
759 case LTTNG_EVENT_TRACEPOINT:
760 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
761 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
762 MSG("All %s tracepoints%s are enabled in channel %s for loglevel %s",
763 get_domain_str(dom.type),
764 exclusion_string,
765 print_channel_name(channel_name),
766 opt_loglevel);
767 free(exclusion_string);
768 } else {
769 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
770 MSG("All %s tracepoints%s are enabled in channel %s",
771 get_domain_str(dom.type),
772 exclusion_string,
773 print_channel_name(channel_name));
774 free(exclusion_string);
775 }
776 break;
777 case LTTNG_EVENT_SYSCALL:
778 if (opt_kernel) {
779 MSG("All kernel system calls are enabled in channel %s",
780 print_channel_name(channel_name));
781 }
782 break;
783 case LTTNG_EVENT_ALL:
784 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
785 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
786 MSG("All %s events%s are enabled in channel %s for loglevel %s",
787 get_domain_str(dom.type),
788 exclusion_string,
789 print_channel_name(channel_name),
790 opt_loglevel);
791 free(exclusion_string);
792 } else {
793 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
794 MSG("All %s events%s are enabled in channel %s",
795 get_domain_str(dom.type),
796 exclusion_string,
797 print_channel_name(channel_name));
798 free(exclusion_string);
799 }
800 break;
801 default:
802 /*
803 * We should not be here since lttng_enable_event should have
804 * failed on the event type.
805 */
806 goto error;
807 }
808 }
809
810 if (opt_filter) {
811 command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
812 opt_filter, exclusion_count, exclusion_list);
813 if (command_ret < 0) {
814 switch (-command_ret) {
815 case LTTNG_ERR_FILTER_EXIST:
816 WARN("Filter on all events is already enabled"
817 " (channel %s, session %s)",
818 print_channel_name(channel_name), session_name);
819 warn = 1;
820 break;
821 default:
822 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
823 lttng_strerror(command_ret),
824 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
825 ? print_raw_channel_name(channel_name)
826 : print_channel_name(channel_name),
827 session_name, opt_filter);
828 error = 1;
829 break;
830 }
831 error_holder = command_ret;
832 } else {
833 ev.filter = 1;
834 MSG("Filter '%s' successfully set", opt_filter);
835 }
836 }
837
838 if (lttng_opt_mi) {
839 /* The wildcard * is used for kernel and ust domain to
840 * represent ALL. We copy * in event name to force the wildcard use
841 * for kernel domain
842 *
843 * Note: this is strictly for semantic and printing while in
844 * machine interface mode.
845 */
846 strcpy(ev.name, "*");
847
848 /* If we reach here the events are enabled */
849 if (!error && !warn) {
850 ev.enabled = 1;
851 } else {
852 ev.enabled = 0;
853 success = 0;
854 }
855 ret = mi_lttng_event(writer, &ev, 1);
856 if (ret) {
857 ret = CMD_ERROR;
858 goto error;
859 }
860
861 /* print exclusion */
862 ret = mi_print_exclusion(exclusion_count, exclusion_list);
863 if (ret) {
864 ret = CMD_ERROR;
865 goto error;
866 }
867
868 /* Success ? */
869 ret = mi_lttng_writer_write_element_bool(writer,
870 mi_lttng_element_command_success, success);
871 if (ret) {
872 ret = CMD_ERROR;
873 goto error;
874 }
875
876 /* Close event element */
877 ret = mi_lttng_writer_close_element(writer);
878 if (ret) {
879 ret = CMD_ERROR;
880 goto error;
881 }
882 }
883
884 goto end;
885 }
886
887 /* Strip event list */
888 event_name = strtok(opt_event_list, ",");
889 while (event_name != NULL) {
890 /* Copy name and type of the event */
891 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
892 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
893 ev.type = opt_event_type;
894
895 /* Kernel tracer action */
896 if (opt_kernel) {
897 DBG("Enabling kernel event %s for channel %s",
898 event_name,
899 print_channel_name(channel_name));
900
901 switch (opt_event_type) {
902 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
903 ev.type = LTTNG_EVENT_TRACEPOINT;
904 /* Fall-through */
905 case LTTNG_EVENT_TRACEPOINT:
906 break;
907 case LTTNG_EVENT_PROBE:
908 ret = parse_probe_opts(&ev, opt_probe);
909 if (ret < 0) {
910 ERR("Unable to parse probe options");
911 ret = 0;
912 goto error;
913 }
914 break;
915 case LTTNG_EVENT_FUNCTION:
916 ret = parse_probe_opts(&ev, opt_function);
917 if (ret < 0) {
918 ERR("Unable to parse function probe options");
919 ret = 0;
920 goto error;
921 }
922 break;
923 case LTTNG_EVENT_FUNCTION_ENTRY:
924 strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
925 LTTNG_SYMBOL_NAME_LEN);
926 ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
927 break;
928 case LTTNG_EVENT_SYSCALL:
929 MSG("per-syscall selection not supported yet. Use \"-a\" "
930 "for all syscalls.");
931 default:
932 ret = CMD_UNDEFINED;
933 goto error;
934 }
935
936 /* kernel loglevels not implemented */
937 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
938 } else if (opt_userspace) { /* User-space tracer action */
939 #if 0
940 if (opt_cmd_name != NULL || opt_pid) {
941 MSG("Only supporting tracing all UST processes (-u) for now.");
942 ret = CMD_UNDEFINED;
943 goto error;
944 }
945 #endif
946
947 DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
948 print_channel_name(channel_name), opt_loglevel ? : "<all>");
949
950 switch (opt_event_type) {
951 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
952 /* Fall-through */
953 case LTTNG_EVENT_TRACEPOINT:
954 /* Copy name and type of the event */
955 ev.type = LTTNG_EVENT_TRACEPOINT;
956 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
957 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
958 break;
959 case LTTNG_EVENT_PROBE:
960 case LTTNG_EVENT_FUNCTION:
961 case LTTNG_EVENT_FUNCTION_ENTRY:
962 case LTTNG_EVENT_SYSCALL:
963 default:
964 ERR("Event type not available for user-space tracing");
965 ret = CMD_UNSUPPORTED;
966 goto error;
967 }
968
969 if (opt_exclude) {
970 ev.exclusion = 1;
971 if (opt_event_type != LTTNG_EVENT_ALL && opt_event_type != LTTNG_EVENT_TRACEPOINT) {
972 ERR("Exclusion option can only be used with tracepoint events");
973 ret = CMD_ERROR;
974 goto error;
975 }
976 /* Free previously allocated items */
977 if (exclusion_list != NULL) {
978 while (exclusion_count--) {
979 free(exclusion_list[exclusion_count]);
980 }
981 free(exclusion_list);
982 exclusion_list = NULL;
983 }
984 /* Check for proper subsets */
985 ret = check_exclusion_subsets(event_name, opt_exclude,
986 &exclusion_count, &exclusion_list);
987 if (ret == CMD_ERROR) {
988 goto error;
989 }
990 }
991
992 ev.loglevel_type = opt_loglevel_type;
993 if (opt_loglevel) {
994 ev.loglevel = loglevel_str_to_value(opt_loglevel);
995 if (ev.loglevel == -1) {
996 ERR("Unknown loglevel %s", opt_loglevel);
997 ret = -LTTNG_ERR_INVALID;
998 goto error;
999 }
1000 } else {
1001 ev.loglevel = -1;
1002 }
1003 } else if (opt_jul || opt_log4j) {
1004 if (opt_event_type != LTTNG_EVENT_ALL &&
1005 opt_event_type != LTTNG_EVENT_TRACEPOINT) {
1006 ERR("Event type not supported for domain.");
1007 ret = CMD_UNSUPPORTED;
1008 goto error;
1009 }
1010
1011 ev.loglevel_type = opt_loglevel_type;
1012 if (opt_loglevel) {
1013 if (opt_jul) {
1014 ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
1015 } else if (opt_log4j) {
1016 ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
1017 }
1018 if (ev.loglevel == -1) {
1019 ERR("Unknown loglevel %s", opt_loglevel);
1020 ret = -LTTNG_ERR_INVALID;
1021 goto error;
1022 }
1023 } else {
1024 if (opt_jul) {
1025 ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
1026 } else if (opt_log4j) {
1027 ev.loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
1028 }
1029 }
1030 ev.type = LTTNG_EVENT_TRACEPOINT;
1031 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
1032 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
1033 } else {
1034 print_missing_domain();
1035 ret = CMD_ERROR;
1036 goto error;
1037 }
1038
1039 if (!opt_filter) {
1040 char *exclusion_string;
1041
1042 command_ret = lttng_enable_event_with_exclusions(handle,
1043 &ev, channel_name,
1044 NULL, exclusion_count, exclusion_list);
1045 exclusion_string = print_exclusions(exclusion_count, exclusion_list);
1046 if (command_ret < 0) {
1047 /* Turn ret to positive value to handle the positive error code */
1048 switch (-command_ret) {
1049 case LTTNG_ERR_KERN_EVENT_EXIST:
1050 WARN("Kernel event %s%s already enabled (channel %s, session %s)",
1051 event_name,
1052 exclusion_string,
1053 print_channel_name(channel_name), session_name);
1054 warn = 1;
1055 break;
1056 default:
1057 ERR("Event %s%s: %s (channel %s, session %s)", event_name,
1058 exclusion_string,
1059 lttng_strerror(command_ret),
1060 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
1061 ? print_raw_channel_name(channel_name)
1062 : print_channel_name(channel_name),
1063 session_name);
1064 error = 1;
1065 break;
1066 }
1067 error_holder = command_ret;
1068 } else {
1069 /* So we don't print the default channel name for agent domain. */
1070 if (dom.type == LTTNG_DOMAIN_JUL ||
1071 dom.type == LTTNG_DOMAIN_LOG4J) {
1072 MSG("%s event %s%s enabled.",
1073 get_domain_str(dom.type), event_name,
1074 exclusion_string);
1075 } else {
1076 MSG("%s event %s%s created in channel %s",
1077 get_domain_str(dom.type), event_name,
1078 exclusion_string,
1079 print_channel_name(channel_name));
1080 }
1081 }
1082 free(exclusion_string);
1083 }
1084
1085 if (opt_filter) {
1086 char *exclusion_string;
1087
1088 /* Filter present */
1089 ev.filter = 1;
1090
1091 command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
1092 opt_filter, exclusion_count, exclusion_list);
1093 exclusion_string = print_exclusions(exclusion_count, exclusion_list);
1094
1095 if (command_ret < 0) {
1096 switch (-command_ret) {
1097 case LTTNG_ERR_FILTER_EXIST:
1098 WARN("Filter on event %s%s is already enabled"
1099 " (channel %s, session %s)",
1100 event_name,
1101 exclusion_string,
1102 print_channel_name(channel_name), session_name);
1103 warn = 1;
1104 break;
1105 default:
1106 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
1107 exclusion_string,
1108 lttng_strerror(command_ret),
1109 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
1110 ? print_raw_channel_name(channel_name)
1111 : print_channel_name(channel_name),
1112 session_name, opt_filter);
1113 error = 1;
1114 break;
1115 }
1116 error_holder = command_ret;
1117
1118 } else {
1119 MSG("Event %s%s: Filter '%s' successfully set",
1120 event_name, exclusion_string,
1121 opt_filter);
1122 }
1123 free(exclusion_string);
1124 }
1125
1126 if (lttng_opt_mi) {
1127 if (command_ret) {
1128 success = 0;
1129 ev.enabled = 0;
1130 } else {
1131 ev.enabled = 1;
1132 }
1133
1134 ret = mi_lttng_event(writer, &ev, 1);
1135 if (ret) {
1136 ret = CMD_ERROR;
1137 goto error;
1138 }
1139
1140 /* print exclusion */
1141 ret = mi_print_exclusion(exclusion_count, exclusion_list);
1142 if (ret) {
1143 ret = CMD_ERROR;
1144 goto error;
1145 }
1146
1147 /* Success ? */
1148 ret = mi_lttng_writer_write_element_bool(writer,
1149 mi_lttng_element_command_success, success);
1150 if (ret) {
1151 ret = CMD_ERROR;
1152 goto end;
1153 }
1154
1155 /* Close event element */
1156 ret = mi_lttng_writer_close_element(writer);
1157 if (ret) {
1158 ret = CMD_ERROR;
1159 goto end;
1160 }
1161 }
1162
1163 /* Next event */
1164 event_name = strtok(NULL, ",");
1165 /* Reset warn, error and success */
1166 success = 1;
1167 }
1168
1169 end:
1170 /* Close Mi */
1171 if (lttng_opt_mi) {
1172 /* Close events element */
1173 ret = mi_lttng_writer_close_element(writer);
1174 if (ret) {
1175 ret = CMD_ERROR;
1176 goto error;
1177 }
1178 }
1179 error:
1180 if (warn) {
1181 ret = CMD_WARNING;
1182 }
1183 if (error) {
1184 ret = CMD_ERROR;
1185 }
1186 lttng_destroy_handle(handle);
1187
1188 if (exclusion_list != NULL) {
1189 while (exclusion_count--) {
1190 free(exclusion_list[exclusion_count]);
1191 }
1192 free(exclusion_list);
1193 }
1194
1195 /* Overwrite ret with error_holder if there was an actual error with
1196 * enabling an event.
1197 */
1198 ret = error_holder ? error_holder : ret;
1199
1200 return ret;
1201 }
1202
1203 /*
1204 * Add event to trace session
1205 */
1206 int cmd_enable_events(int argc, const char **argv)
1207 {
1208 int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
1209 static poptContext pc;
1210 char *session_name = NULL;
1211 int event_type = -1;
1212
1213 pc = poptGetContext(NULL, argc, argv, long_options, 0);
1214 poptReadDefaultConfig(pc, 0);
1215
1216 /* Default event type */
1217 opt_event_type = LTTNG_EVENT_ALL;
1218
1219 while ((opt = poptGetNextOpt(pc)) != -1) {
1220 switch (opt) {
1221 case OPT_HELP:
1222 usage(stdout);
1223 goto end;
1224 case OPT_TRACEPOINT:
1225 opt_event_type = LTTNG_EVENT_TRACEPOINT;
1226 break;
1227 case OPT_PROBE:
1228 opt_event_type = LTTNG_EVENT_PROBE;
1229 break;
1230 case OPT_FUNCTION:
1231 opt_event_type = LTTNG_EVENT_FUNCTION;
1232 break;
1233 case OPT_FUNCTION_ENTRY:
1234 opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
1235 break;
1236 case OPT_SYSCALL:
1237 opt_event_type = LTTNG_EVENT_SYSCALL;
1238 break;
1239 case OPT_USERSPACE:
1240 opt_userspace = 1;
1241 break;
1242 case OPT_LOGLEVEL:
1243 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
1244 opt_loglevel = poptGetOptArg(pc);
1245 break;
1246 case OPT_LOGLEVEL_ONLY:
1247 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
1248 opt_loglevel = poptGetOptArg(pc);
1249 break;
1250 case OPT_LIST_OPTIONS:
1251 list_cmd_options(stdout, long_options);
1252 goto end;
1253 case OPT_FILTER:
1254 break;
1255 case OPT_EXCLUDE:
1256 break;
1257 default:
1258 usage(stderr);
1259 ret = CMD_UNDEFINED;
1260 goto end;
1261 }
1262
1263 /* Validate event type. Multiple event type are not supported. */
1264 if (event_type == -1) {
1265 event_type = opt_event_type;
1266 } else {
1267 if (event_type != opt_event_type) {
1268 ERR("Multiple event type not supported.");
1269 ret = CMD_ERROR;
1270 goto end;
1271 }
1272 }
1273 }
1274
1275 /* Mi check */
1276 if (lttng_opt_mi) {
1277 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
1278 if (!writer) {
1279 ret = -LTTNG_ERR_NOMEM;
1280 goto end;
1281 }
1282
1283 /* Open command element */
1284 ret = mi_lttng_writer_command_open(writer,
1285 mi_lttng_element_command_enable_event);
1286 if (ret) {
1287 ret = CMD_ERROR;
1288 goto end;
1289 }
1290
1291 /* Open output element */
1292 ret = mi_lttng_writer_open_element(writer,
1293 mi_lttng_element_command_output);
1294 if (ret) {
1295 ret = CMD_ERROR;
1296 goto end;
1297 }
1298 }
1299
1300 opt_event_list = (char*) poptGetArg(pc);
1301 if (opt_event_list == NULL && opt_enable_all == 0) {
1302 ERR("Missing event name(s).\n");
1303 usage(stderr);
1304 ret = CMD_ERROR;
1305 goto end;
1306 }
1307
1308 if (!opt_session_name) {
1309 session_name = get_session_name();
1310 if (session_name == NULL) {
1311 command_ret = CMD_ERROR;
1312 success = 0;
1313 goto mi_closing;
1314 }
1315 } else {
1316 session_name = opt_session_name;
1317 }
1318
1319 command_ret = enable_events(session_name);
1320 if (command_ret) {
1321 success = 0;
1322 goto mi_closing;
1323 }
1324
1325 mi_closing:
1326 /* Mi closing */
1327 if (lttng_opt_mi) {
1328 /* Close output element */
1329 ret = mi_lttng_writer_close_element(writer);
1330 if (ret) {
1331 ret = CMD_ERROR;
1332 goto end;
1333 }
1334
1335 ret = mi_lttng_writer_write_element_bool(writer,
1336 mi_lttng_element_command_success, success);
1337 if (ret) {
1338 ret = CMD_ERROR;
1339 goto end;
1340 }
1341
1342 /* Command element close */
1343 ret = mi_lttng_writer_command_close(writer);
1344 if (ret) {
1345 ret = CMD_ERROR;
1346 goto end;
1347 }
1348 }
1349
1350 end:
1351 /* Mi clean-up */
1352 if (writer && mi_lttng_writer_destroy(writer)) {
1353 /* Preserve original error code */
1354 ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
1355 }
1356
1357 if (opt_session_name == NULL) {
1358 free(session_name);
1359 }
1360
1361 /* Overwrite ret if an error occurred in enable_events */
1362 ret = command_ret ? command_ret : ret;
1363
1364 poptFreeContext(pc);
1365 return ret;
1366 }
LTTng tools - Deliverables
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