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Fix: error on no/multiple domain options
[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 | -j | -l | -p) [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 = zmalloc(length);
518 if (!ret) {
519 return NULL;
520 }
521 strncpy(ret, preamble, length);
522 for (i = 0; i < count; i++) {
523 strcat(ret, names[i]);
524 if (i != count - 1) {
525 strcat(ret, ",");
526 }
527 }
528
529 return ret;
530 }
531
532 /*
533 * Compare list of exclusions against an event name.
534 * Return a list of legal exclusion names.
535 * Produce an error or a warning about others (depending on the situation)
536 */
537 static
538 int check_exclusion_subsets(const char *event_name,
539 const char *exclusions,
540 int *exclusion_count_ptr,
541 char ***exclusion_list_ptr)
542 {
543 const char *excluder_ptr;
544 const char *event_ptr;
545 const char *next_excluder;
546 int excluder_length;
547 int exclusion_count = 0;
548 char **exclusion_list = NULL;
549 int ret = CMD_SUCCESS;
550
551 if (event_name[strlen(event_name) - 1] != '*') {
552 ERR("Event %s: Excluders can only be used with wildcarded events", event_name);
553 goto error;
554 }
555
556 next_excluder = exclusions;
557 while (*next_excluder != 0) {
558 event_ptr = event_name;
559 excluder_ptr = next_excluder;
560 excluder_length = strcspn(next_excluder, ",");
561
562 /* Scan both the excluder and the event letter by letter */
563 while (1) {
564 char e, x;
565
566 e = *event_ptr;
567 x = *excluder_ptr;
568
569 if (x == '*') {
570 /* Event is a subset of the excluder */
571 ERR("Event %s: %.*s excludes all events from %s",
572 event_name,
573 excluder_length,
574 next_excluder,
575 event_name);
576 goto error;
577 }
578 if (e == '*') {
579 char *string;
580 char **new_exclusion_list;
581
582 /* Excluder is a proper subset of event */
583 string = strndup(next_excluder, excluder_length);
584 if (!string) {
585 PERROR("strndup error");
586 goto error;
587 }
588 new_exclusion_list = realloc(exclusion_list,
589 sizeof(char *) * (exclusion_count + 1));
590 if (!new_exclusion_list) {
591 PERROR("realloc");
592 free(string);
593 goto error;
594 }
595 exclusion_list = new_exclusion_list;
596 exclusion_count++;
597 exclusion_list[exclusion_count - 1] = string;
598 break;
599 }
600 if (x != e) {
601 /* Excluder and event sets have no common elements */
602 WARN("Event %s: %.*s does not exclude any events from %s",
603 event_name,
604 excluder_length,
605 next_excluder,
606 event_name);
607 break;
608 }
609 excluder_ptr++;
610 event_ptr++;
611 }
612 /* next excluder */
613 next_excluder += excluder_length;
614 if (*next_excluder == ',') {
615 next_excluder++;
616 }
617 }
618 goto end;
619 error:
620 while (exclusion_count--) {
621 free(exclusion_list[exclusion_count]);
622 }
623 if (exclusion_list != NULL) {
624 free(exclusion_list);
625 }
626 exclusion_list = NULL;
627 exclusion_count = 0;
628 ret = CMD_ERROR;
629 end:
630 *exclusion_count_ptr = exclusion_count;
631 *exclusion_list_ptr = exclusion_list;
632 return ret;
633 }
634 /*
635 * Enabling event using the lttng API.
636 * Note: in case of error only the last error code will be return.
637 */
638 static int enable_events(char *session_name)
639 {
640 int ret = CMD_SUCCESS, command_ret = CMD_SUCCESS;
641 int error_holder = CMD_SUCCESS, warn = 0, error = 0, success = 1;
642 char *event_name, *channel_name = NULL;
643 struct lttng_event ev;
644 struct lttng_domain dom;
645 int exclusion_count = 0;
646 char **exclusion_list = NULL;
647
648 memset(&ev, 0, sizeof(ev));
649 memset(&dom, 0, sizeof(dom));
650
651 if (opt_kernel) {
652 if (opt_filter) {
653 ERR("Filter not implement for kernel tracing yet");
654 ret = CMD_ERROR;
655 goto error;
656 }
657 if (opt_loglevel) {
658 WARN("Kernel loglevels are not supported.");
659 }
660 }
661
662 /* Create lttng domain */
663 if (opt_kernel) {
664 dom.type = LTTNG_DOMAIN_KERNEL;
665 dom.buf_type = LTTNG_BUFFER_GLOBAL;
666 } else if (opt_userspace) {
667 dom.type = LTTNG_DOMAIN_UST;
668 /* Default. */
669 dom.buf_type = LTTNG_BUFFER_PER_UID;
670 } else if (opt_jul) {
671 dom.type = LTTNG_DOMAIN_JUL;
672 /* Default. */
673 dom.buf_type = LTTNG_BUFFER_PER_UID;
674 } else if (opt_log4j) {
675 dom.type = LTTNG_DOMAIN_LOG4J;
676 /* Default. */
677 dom.buf_type = LTTNG_BUFFER_PER_UID;
678 } else {
679 /* Checked by the caller. */
680 assert(0);
681 }
682
683 if (opt_exclude) {
684 switch (dom.type) {
685 case LTTNG_DOMAIN_KERNEL:
686 case LTTNG_DOMAIN_JUL:
687 case LTTNG_DOMAIN_LOG4J:
688 ERR("Event name exclusions are not yet implemented for %s events",
689 get_domain_str(dom.type));
690 ret = CMD_ERROR;
691 goto error;
692 case LTTNG_DOMAIN_UST:
693 /* Exclusions supported */
694 break;
695 default:
696 assert(0);
697 }
698 }
699
700 channel_name = opt_channel_name;
701
702 handle = lttng_create_handle(session_name, &dom);
703 if (handle == NULL) {
704 ret = -1;
705 goto error;
706 }
707
708 /* Prepare Mi */
709 if (lttng_opt_mi) {
710 /* Open a events element */
711 ret = mi_lttng_writer_open_element(writer, config_element_events);
712 if (ret) {
713 ret = CMD_ERROR;
714 goto error;
715 }
716 }
717
718 if (opt_enable_all) {
719 /* Default setup for enable all */
720 if (opt_kernel) {
721 ev.type = opt_event_type;
722 ev.name[0] = '\0';
723 /* kernel loglevels not implemented */
724 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
725 } else {
726 ev.type = LTTNG_EVENT_TRACEPOINT;
727 strcpy(ev.name, "*");
728 ev.loglevel_type = opt_loglevel_type;
729 if (opt_loglevel) {
730 assert(opt_userspace || opt_jul || opt_log4j);
731 if (opt_userspace) {
732 ev.loglevel = loglevel_str_to_value(opt_loglevel);
733 } else if (opt_jul) {
734 ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
735 } else if (opt_log4j) {
736 ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
737 }
738 if (ev.loglevel == -1) {
739 ERR("Unknown loglevel %s", opt_loglevel);
740 ret = -LTTNG_ERR_INVALID;
741 goto error;
742 }
743 } else {
744 assert(opt_userspace || opt_jul || opt_log4j);
745 if (opt_userspace) {
746 ev.loglevel = -1;
747 } else if (opt_jul || opt_log4j) {
748 ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
749 }
750 }
751 }
752
753 if (opt_exclude) {
754 ret = check_exclusion_subsets("*", opt_exclude,
755 &exclusion_count, &exclusion_list);
756 if (ret == CMD_ERROR) {
757 goto error;
758 }
759 ev.exclusion = 1;
760 }
761 if (!opt_filter) {
762 ret = lttng_enable_event_with_exclusions(handle,
763 &ev, channel_name,
764 NULL,
765 exclusion_count, exclusion_list);
766 if (ret < 0) {
767 switch (-ret) {
768 case LTTNG_ERR_KERN_EVENT_EXIST:
769 WARN("Kernel events already enabled (channel %s, session %s)",
770 print_channel_name(channel_name), session_name);
771 warn = 1;
772 break;
773 case LTTNG_ERR_TRACE_ALREADY_STARTED:
774 {
775 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
776 ERR("Events: %s (channel %s, session %s)",
777 msg,
778 print_channel_name(channel_name),
779 session_name);
780 error = 1;
781 break;
782 }
783 default:
784 ERR("Events: %s (channel %s, session %s)",
785 lttng_strerror(ret),
786 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
787 ? print_raw_channel_name(channel_name)
788 : print_channel_name(channel_name),
789 session_name);
790 error = 1;
791 break;
792 }
793 goto end;
794 }
795
796 switch (opt_event_type) {
797 case LTTNG_EVENT_TRACEPOINT:
798 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
799 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
800
801 if (!exclusion_string) {
802 PERROR("Cannot allocate exclusion_string");
803 error = 1;
804 goto end;
805 }
806 MSG("All %s tracepoints%s are enabled in channel %s for loglevel %s",
807 get_domain_str(dom.type),
808 exclusion_string,
809 print_channel_name(channel_name),
810 opt_loglevel);
811 free(exclusion_string);
812 } else {
813 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
814
815 if (!exclusion_string) {
816 PERROR("Cannot allocate exclusion_string");
817 error = 1;
818 goto end;
819 }
820 MSG("All %s tracepoints%s are enabled in channel %s",
821 get_domain_str(dom.type),
822 exclusion_string,
823 print_channel_name(channel_name));
824 free(exclusion_string);
825 }
826 break;
827 case LTTNG_EVENT_SYSCALL:
828 if (opt_kernel) {
829 MSG("All %s system calls are enabled in channel %s",
830 get_domain_str(dom.type),
831 print_channel_name(channel_name));
832 }
833 break;
834 case LTTNG_EVENT_ALL:
835 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
836 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
837
838 if (!exclusion_string) {
839 PERROR("Cannot allocate exclusion_string");
840 error = 1;
841 goto end;
842 }
843 MSG("All %s events%s are enabled in channel %s for loglevel %s",
844 get_domain_str(dom.type),
845 exclusion_string,
846 print_channel_name(channel_name),
847 opt_loglevel);
848 free(exclusion_string);
849 } else {
850 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
851
852 if (!exclusion_string) {
853 PERROR("Cannot allocate exclusion_string");
854 error = 1;
855 goto end;
856 }
857 MSG("All %s events%s are enabled in channel %s",
858 get_domain_str(dom.type),
859 exclusion_string,
860 print_channel_name(channel_name));
861 free(exclusion_string);
862 }
863 break;
864 default:
865 /*
866 * We should not be here since lttng_enable_event should have
867 * failed on the event type.
868 */
869 goto error;
870 }
871 }
872
873 if (opt_filter) {
874 command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
875 opt_filter, exclusion_count, exclusion_list);
876 if (command_ret < 0) {
877 switch (-command_ret) {
878 case LTTNG_ERR_FILTER_EXIST:
879 WARN("Filter on all events is already enabled"
880 " (channel %s, session %s)",
881 print_channel_name(channel_name), session_name);
882 warn = 1;
883 break;
884 case LTTNG_ERR_TRACE_ALREADY_STARTED:
885 {
886 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
887 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
888 msg,
889 print_channel_name(channel_name),
890 session_name, opt_filter);
891 error = 1;
892 break;
893 }
894 default:
895 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
896 lttng_strerror(command_ret),
897 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
898 ? print_raw_channel_name(channel_name)
899 : print_channel_name(channel_name),
900 session_name, opt_filter);
901 error = 1;
902 break;
903 }
904 error_holder = command_ret;
905 } else {
906 ev.filter = 1;
907 MSG("Filter '%s' successfully set", opt_filter);
908 }
909 }
910
911 if (lttng_opt_mi) {
912 /* The wildcard * is used for kernel and ust domain to
913 * represent ALL. We copy * in event name to force the wildcard use
914 * for kernel domain
915 *
916 * Note: this is strictly for semantic and printing while in
917 * machine interface mode.
918 */
919 strcpy(ev.name, "*");
920
921 /* If we reach here the events are enabled */
922 if (!error && !warn) {
923 ev.enabled = 1;
924 } else {
925 ev.enabled = 0;
926 success = 0;
927 }
928 ret = mi_lttng_event(writer, &ev, 1, handle->domain.type);
929 if (ret) {
930 ret = CMD_ERROR;
931 goto error;
932 }
933
934 /* print exclusion */
935 ret = mi_print_exclusion(exclusion_count, exclusion_list);
936 if (ret) {
937 ret = CMD_ERROR;
938 goto error;
939 }
940
941 /* Success ? */
942 ret = mi_lttng_writer_write_element_bool(writer,
943 mi_lttng_element_command_success, success);
944 if (ret) {
945 ret = CMD_ERROR;
946 goto error;
947 }
948
949 /* Close event element */
950 ret = mi_lttng_writer_close_element(writer);
951 if (ret) {
952 ret = CMD_ERROR;
953 goto error;
954 }
955 }
956
957 goto end;
958 }
959
960 /* Strip event list */
961 event_name = strtok(opt_event_list, ",");
962 while (event_name != NULL) {
963 /* Copy name and type of the event */
964 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
965 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
966 ev.type = opt_event_type;
967
968 /* Kernel tracer action */
969 if (opt_kernel) {
970 DBG("Enabling kernel event %s for channel %s",
971 event_name,
972 print_channel_name(channel_name));
973
974 switch (opt_event_type) {
975 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
976 ev.type = LTTNG_EVENT_TRACEPOINT;
977 /* Fall-through */
978 case LTTNG_EVENT_TRACEPOINT:
979 break;
980 case LTTNG_EVENT_PROBE:
981 ret = parse_probe_opts(&ev, opt_probe);
982 if (ret) {
983 ERR("Unable to parse probe options");
984 ret = 0;
985 goto error;
986 }
987 break;
988 case LTTNG_EVENT_FUNCTION:
989 ret = parse_probe_opts(&ev, opt_function);
990 if (ret) {
991 ERR("Unable to parse function probe options");
992 ret = 0;
993 goto error;
994 }
995 break;
996 case LTTNG_EVENT_FUNCTION_ENTRY:
997 strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
998 LTTNG_SYMBOL_NAME_LEN);
999 ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
1000 break;
1001 case LTTNG_EVENT_SYSCALL:
1002 ev.type = LTTNG_EVENT_SYSCALL;
1003 break;
1004 default:
1005 ret = CMD_UNDEFINED;
1006 goto error;
1007 }
1008
1009 /* kernel loglevels not implemented */
1010 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
1011 } else if (opt_userspace) { /* User-space tracer action */
1012 #if 0
1013 if (opt_cmd_name != NULL || opt_pid) {
1014 MSG("Only supporting tracing all UST processes (-u) for now.");
1015 ret = CMD_UNDEFINED;
1016 goto error;
1017 }
1018 #endif
1019
1020 DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
1021 print_channel_name(channel_name), opt_loglevel ? : "<all>");
1022
1023 switch (opt_event_type) {
1024 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
1025 /* Fall-through */
1026 case LTTNG_EVENT_TRACEPOINT:
1027 /* Copy name and type of the event */
1028 ev.type = LTTNG_EVENT_TRACEPOINT;
1029 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
1030 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
1031 break;
1032 case LTTNG_EVENT_PROBE:
1033 case LTTNG_EVENT_FUNCTION:
1034 case LTTNG_EVENT_FUNCTION_ENTRY:
1035 case LTTNG_EVENT_SYSCALL:
1036 default:
1037 ERR("Event type not available for user-space tracing");
1038 ret = CMD_UNSUPPORTED;
1039 goto error;
1040 }
1041
1042 if (opt_exclude) {
1043 ev.exclusion = 1;
1044 if (opt_event_type != LTTNG_EVENT_ALL && opt_event_type != LTTNG_EVENT_TRACEPOINT) {
1045 ERR("Exclusion option can only be used with tracepoint events");
1046 ret = CMD_ERROR;
1047 goto error;
1048 }
1049 /* Free previously allocated items */
1050 if (exclusion_list != NULL) {
1051 while (exclusion_count--) {
1052 free(exclusion_list[exclusion_count]);
1053 }
1054 free(exclusion_list);
1055 exclusion_list = NULL;
1056 }
1057 /* Check for proper subsets */
1058 ret = check_exclusion_subsets(event_name, opt_exclude,
1059 &exclusion_count, &exclusion_list);
1060 if (ret == CMD_ERROR) {
1061 goto error;
1062 }
1063 }
1064
1065 ev.loglevel_type = opt_loglevel_type;
1066 if (opt_loglevel) {
1067 ev.loglevel = loglevel_str_to_value(opt_loglevel);
1068 if (ev.loglevel == -1) {
1069 ERR("Unknown loglevel %s", opt_loglevel);
1070 ret = -LTTNG_ERR_INVALID;
1071 goto error;
1072 }
1073 } else {
1074 ev.loglevel = -1;
1075 }
1076 } else if (opt_jul || opt_log4j) {
1077 if (opt_event_type != LTTNG_EVENT_ALL &&
1078 opt_event_type != LTTNG_EVENT_TRACEPOINT) {
1079 ERR("Event type not supported for domain.");
1080 ret = CMD_UNSUPPORTED;
1081 goto error;
1082 }
1083
1084 ev.loglevel_type = opt_loglevel_type;
1085 if (opt_loglevel) {
1086 if (opt_jul) {
1087 ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
1088 } else if (opt_log4j) {
1089 ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
1090 }
1091 if (ev.loglevel == -1) {
1092 ERR("Unknown loglevel %s", opt_loglevel);
1093 ret = -LTTNG_ERR_INVALID;
1094 goto error;
1095 }
1096 } else {
1097 if (opt_jul) {
1098 ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
1099 } else if (opt_log4j) {
1100 ev.loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
1101 }
1102 }
1103 ev.type = LTTNG_EVENT_TRACEPOINT;
1104 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
1105 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
1106 } else {
1107 assert(0);
1108 }
1109
1110 if (!opt_filter) {
1111 char *exclusion_string;
1112
1113 command_ret = lttng_enable_event_with_exclusions(handle,
1114 &ev, channel_name,
1115 NULL, exclusion_count, exclusion_list);
1116 exclusion_string = print_exclusions(exclusion_count, exclusion_list);
1117 if (!exclusion_string) {
1118 PERROR("Cannot allocate exclusion_string");
1119 error = 1;
1120 goto end;
1121 }
1122 if (command_ret < 0) {
1123 /* Turn ret to positive value to handle the positive error code */
1124 switch (-command_ret) {
1125 case LTTNG_ERR_KERN_EVENT_EXIST:
1126 WARN("Kernel event %s%s already enabled (channel %s, session %s)",
1127 event_name,
1128 exclusion_string,
1129 print_channel_name(channel_name), session_name);
1130 warn = 1;
1131 break;
1132 case LTTNG_ERR_TRACE_ALREADY_STARTED:
1133 {
1134 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
1135 ERR("Event %s%s: %s (channel %s, session %s)", event_name,
1136 exclusion_string,
1137 msg,
1138 print_channel_name(channel_name),
1139 session_name);
1140 error = 1;
1141 break;
1142 }
1143 default:
1144 ERR("Event %s%s: %s (channel %s, session %s)", event_name,
1145 exclusion_string,
1146 lttng_strerror(command_ret),
1147 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
1148 ? print_raw_channel_name(channel_name)
1149 : print_channel_name(channel_name),
1150 session_name);
1151 error = 1;
1152 break;
1153 }
1154 error_holder = command_ret;
1155 } else {
1156 switch (dom.type) {
1157 case LTTNG_DOMAIN_KERNEL:
1158 case LTTNG_DOMAIN_UST:
1159 MSG("%s event %s%s created in channel %s",
1160 get_domain_str(dom.type),
1161 event_name,
1162 exclusion_string,
1163 print_channel_name(channel_name));
1164 break;
1165 case LTTNG_DOMAIN_JUL:
1166 case LTTNG_DOMAIN_LOG4J:
1167 /*
1168 * Don't print the default channel
1169 * name for agent domains.
1170 */
1171 MSG("%s event %s%s enabled",
1172 get_domain_str(dom.type),
1173 event_name,
1174 exclusion_string);
1175 break;
1176 default:
1177 assert(0);
1178 }
1179 }
1180 free(exclusion_string);
1181 }
1182
1183 if (opt_filter) {
1184 char *exclusion_string;
1185
1186 /* Filter present */
1187 ev.filter = 1;
1188
1189 command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
1190 opt_filter, exclusion_count, exclusion_list);
1191 exclusion_string = print_exclusions(exclusion_count, exclusion_list);
1192 if (!exclusion_string) {
1193 PERROR("Cannot allocate exclusion_string");
1194 error = 1;
1195 goto end;
1196 }
1197 if (command_ret < 0) {
1198 switch (-command_ret) {
1199 case LTTNG_ERR_FILTER_EXIST:
1200 WARN("Filter on event %s%s is already enabled"
1201 " (channel %s, session %s)",
1202 event_name,
1203 exclusion_string,
1204 print_channel_name(channel_name), session_name);
1205 warn = 1;
1206 break;
1207 case LTTNG_ERR_TRACE_ALREADY_STARTED:
1208 {
1209 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
1210 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
1211 exclusion_string,
1212 msg,
1213 print_channel_name(channel_name),
1214 session_name, opt_filter);
1215 error = 1;
1216 break;
1217 }
1218 default:
1219 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
1220 exclusion_string,
1221 lttng_strerror(command_ret),
1222 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
1223 ? print_raw_channel_name(channel_name)
1224 : print_channel_name(channel_name),
1225 session_name, opt_filter);
1226 error = 1;
1227 break;
1228 }
1229 error_holder = command_ret;
1230
1231 } else {
1232 MSG("Event %s%s: Filter '%s' successfully set",
1233 event_name, exclusion_string,
1234 opt_filter);
1235 }
1236 free(exclusion_string);
1237 }
1238
1239 if (lttng_opt_mi) {
1240 if (command_ret) {
1241 success = 0;
1242 ev.enabled = 0;
1243 } else {
1244 ev.enabled = 1;
1245 }
1246
1247 ret = mi_lttng_event(writer, &ev, 1, handle->domain.type);
1248 if (ret) {
1249 ret = CMD_ERROR;
1250 goto error;
1251 }
1252
1253 /* print exclusion */
1254 ret = mi_print_exclusion(exclusion_count, exclusion_list);
1255 if (ret) {
1256 ret = CMD_ERROR;
1257 goto error;
1258 }
1259
1260 /* Success ? */
1261 ret = mi_lttng_writer_write_element_bool(writer,
1262 mi_lttng_element_command_success, success);
1263 if (ret) {
1264 ret = CMD_ERROR;
1265 goto end;
1266 }
1267
1268 /* Close event element */
1269 ret = mi_lttng_writer_close_element(writer);
1270 if (ret) {
1271 ret = CMD_ERROR;
1272 goto end;
1273 }
1274 }
1275
1276 /* Next event */
1277 event_name = strtok(NULL, ",");
1278 /* Reset warn, error and success */
1279 success = 1;
1280 }
1281
1282 end:
1283 /* Close Mi */
1284 if (lttng_opt_mi) {
1285 /* Close events element */
1286 ret = mi_lttng_writer_close_element(writer);
1287 if (ret) {
1288 ret = CMD_ERROR;
1289 goto error;
1290 }
1291 }
1292 error:
1293 if (warn) {
1294 ret = CMD_WARNING;
1295 }
1296 if (error) {
1297 ret = CMD_ERROR;
1298 }
1299 lttng_destroy_handle(handle);
1300
1301 if (exclusion_list != NULL) {
1302 while (exclusion_count--) {
1303 free(exclusion_list[exclusion_count]);
1304 }
1305 free(exclusion_list);
1306 }
1307
1308 /* Overwrite ret with error_holder if there was an actual error with
1309 * enabling an event.
1310 */
1311 ret = error_holder ? error_holder : ret;
1312
1313 return ret;
1314 }
1315
1316 /*
1317 * Add event to trace session
1318 */
1319 int cmd_enable_events(int argc, const char **argv)
1320 {
1321 int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
1322 static poptContext pc;
1323 char *session_name = NULL;
1324 int event_type = -1;
1325
1326 pc = poptGetContext(NULL, argc, argv, long_options, 0);
1327 poptReadDefaultConfig(pc, 0);
1328
1329 /* Default event type */
1330 opt_event_type = LTTNG_EVENT_ALL;
1331
1332 while ((opt = poptGetNextOpt(pc)) != -1) {
1333 switch (opt) {
1334 case OPT_HELP:
1335 usage(stdout);
1336 goto end;
1337 case OPT_TRACEPOINT:
1338 opt_event_type = LTTNG_EVENT_TRACEPOINT;
1339 break;
1340 case OPT_PROBE:
1341 opt_event_type = LTTNG_EVENT_PROBE;
1342 break;
1343 case OPT_FUNCTION:
1344 opt_event_type = LTTNG_EVENT_FUNCTION;
1345 break;
1346 case OPT_FUNCTION_ENTRY:
1347 opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
1348 break;
1349 case OPT_SYSCALL:
1350 opt_event_type = LTTNG_EVENT_SYSCALL;
1351 break;
1352 case OPT_USERSPACE:
1353 opt_userspace = 1;
1354 break;
1355 case OPT_LOGLEVEL:
1356 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
1357 opt_loglevel = poptGetOptArg(pc);
1358 break;
1359 case OPT_LOGLEVEL_ONLY:
1360 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
1361 opt_loglevel = poptGetOptArg(pc);
1362 break;
1363 case OPT_LIST_OPTIONS:
1364 list_cmd_options(stdout, long_options);
1365 goto end;
1366 case OPT_FILTER:
1367 break;
1368 case OPT_EXCLUDE:
1369 break;
1370 default:
1371 usage(stderr);
1372 ret = CMD_UNDEFINED;
1373 goto end;
1374 }
1375
1376 /* Validate event type. Multiple event type are not supported. */
1377 if (event_type == -1) {
1378 event_type = opt_event_type;
1379 } else {
1380 if (event_type != opt_event_type) {
1381 ERR("Multiple event type not supported.");
1382 ret = CMD_ERROR;
1383 goto end;
1384 }
1385 }
1386 }
1387
1388 ret = print_missing_or_multiple_domains(
1389 opt_kernel + opt_userspace + opt_jul + opt_log4j);
1390 if (ret) {
1391 ret = CMD_ERROR;
1392 goto end;
1393 }
1394
1395 /* Mi check */
1396 if (lttng_opt_mi) {
1397 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
1398 if (!writer) {
1399 ret = -LTTNG_ERR_NOMEM;
1400 goto end;
1401 }
1402
1403 /* Open command element */
1404 ret = mi_lttng_writer_command_open(writer,
1405 mi_lttng_element_command_enable_event);
1406 if (ret) {
1407 ret = CMD_ERROR;
1408 goto end;
1409 }
1410
1411 /* Open output element */
1412 ret = mi_lttng_writer_open_element(writer,
1413 mi_lttng_element_command_output);
1414 if (ret) {
1415 ret = CMD_ERROR;
1416 goto end;
1417 }
1418 }
1419
1420 opt_event_list = (char*) poptGetArg(pc);
1421 if (opt_event_list == NULL && opt_enable_all == 0) {
1422 ERR("Missing event name(s).\n");
1423 usage(stderr);
1424 ret = CMD_ERROR;
1425 goto end;
1426 }
1427
1428 if (!opt_session_name) {
1429 session_name = get_session_name();
1430 if (session_name == NULL) {
1431 command_ret = CMD_ERROR;
1432 success = 0;
1433 goto mi_closing;
1434 }
1435 } else {
1436 session_name = opt_session_name;
1437 }
1438
1439 command_ret = enable_events(session_name);
1440 if (command_ret) {
1441 success = 0;
1442 goto mi_closing;
1443 }
1444
1445 mi_closing:
1446 /* Mi closing */
1447 if (lttng_opt_mi) {
1448 /* Close output element */
1449 ret = mi_lttng_writer_close_element(writer);
1450 if (ret) {
1451 ret = CMD_ERROR;
1452 goto end;
1453 }
1454
1455 ret = mi_lttng_writer_write_element_bool(writer,
1456 mi_lttng_element_command_success, success);
1457 if (ret) {
1458 ret = CMD_ERROR;
1459 goto end;
1460 }
1461
1462 /* Command element close */
1463 ret = mi_lttng_writer_command_close(writer);
1464 if (ret) {
1465 ret = CMD_ERROR;
1466 goto end;
1467 }
1468 }
1469
1470 end:
1471 /* Mi clean-up */
1472 if (writer && mi_lttng_writer_destroy(writer)) {
1473 /* Preserve original error code */
1474 ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
1475 }
1476
1477 if (opt_session_name == NULL) {
1478 free(session_name);
1479 }
1480
1481 /* Overwrite ret if an error occurred in enable_events */
1482 ret = command_ret ? command_ret : ret;
1483
1484 poptFreeContext(pc);
1485 return ret;
1486 }
LTTng 2.0 tools and control repository
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