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c4da3dfb67c50ea9cd00d6148a52192722a102d5
[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_python;
51 static int opt_enable_all;
52 static char *opt_probe;
53 static char *opt_function;
54 static char *opt_function_entry_symbol;
55 static char *opt_channel_name;
56 static char *opt_filter;
57 static char *opt_exclude;
58 #if 0
59 /* Not implemented yet */
60 static char *opt_cmd_name;
61 static pid_t opt_pid;
62 #endif
63
64 enum {
65 OPT_HELP = 1,
66 OPT_TRACEPOINT,
67 OPT_PROBE,
68 OPT_FUNCTION,
69 OPT_FUNCTION_ENTRY,
70 OPT_SYSCALL,
71 OPT_USERSPACE,
72 OPT_LOGLEVEL,
73 OPT_LOGLEVEL_ONLY,
74 OPT_LIST_OPTIONS,
75 OPT_FILTER,
76 OPT_EXCLUDE,
77 };
78
79 static struct lttng_handle *handle;
80 static struct mi_writer *writer;
81
82 static struct poptOption long_options[] = {
83 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
84 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
85 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
86 {"all", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
87 {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
88 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
89 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
90 {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
91 {"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0},
92 {"python", 'p', POPT_ARG_VAL, &opt_python, 1, 0, 0},
93 {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
94 {"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
95 {"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
96 #if 0
97 /*
98 * Currently removed from lttng kernel tracer. Removed from
99 * lttng UI to discourage its use.
100 */
101 {"function:entry", 0, POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0},
102 #endif
103 {"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
104 {"loglevel", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL, 0, 0},
105 {"loglevel-only", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL_ONLY, 0, 0},
106 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
107 {"filter", 'f', POPT_ARG_STRING, &opt_filter, OPT_FILTER, 0, 0},
108 {"exclude", 'x', POPT_ARG_STRING, &opt_exclude, OPT_EXCLUDE, 0, 0},
109 {0, 0, 0, 0, 0, 0, 0}
110 };
111
112 /*
113 * usage
114 */
115 static void usage(FILE *ofp)
116 {
117 fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [-k|-u] [OPTIONS] \n");
118 fprintf(ofp, "\n");
119 fprintf(ofp, "Options:\n");
120 fprintf(ofp, " -h, --help Show this help\n");
121 fprintf(ofp, " --list-options Simple listing of options\n");
122 fprintf(ofp, " -s, --session NAME Apply to session name\n");
123 fprintf(ofp, " -c, --channel NAME Apply to this channel\n");
124 fprintf(ofp, " -a, --all Enable all tracepoints and syscalls\n");
125 fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
126 fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
127 fprintf(ofp, " -j, --jul Apply for Java application using JUL\n");
128 fprintf(ofp, " -l, --log4j Apply for Java application using LOG4j\n");
129 fprintf(ofp, " -p, --python Apply for Java application using LOG4j\n");
130 fprintf(ofp, "\n");
131 fprintf(ofp, "Event options:\n");
132 fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
133 fprintf(ofp, " - userspace tracer supports wildcards at end of string.\n");
134 fprintf(ofp, " Don't forget to quote to deal with bash expansion.\n");
135 fprintf(ofp, " e.g.:\n");
136 fprintf(ofp, " \"*\"\n");
137 fprintf(ofp, " \"app_component:na*\"\n");
138 fprintf(ofp, " --probe (addr | symbol | symbol+offset)\n");
139 fprintf(ofp, " Dynamic probe.\n");
140 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
141 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
142 fprintf(ofp, " --function (addr | symbol | symbol+offset)\n");
143 fprintf(ofp, " Dynamic function entry/return probe.\n");
144 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
145 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
146 #if 0
147 fprintf(ofp, " --function:entry symbol\n");
148 fprintf(ofp, " Function tracer event\n");
149 #endif
150 fprintf(ofp, " --syscall System call event\n");
151 fprintf(ofp, "\n");
152 fprintf(ofp, " --loglevel name\n");
153 fprintf(ofp, " Tracepoint loglevel range from 0 to loglevel.\n");
154 fprintf(ofp, " For JUL/LOG4j domain, see the table below for the range values.\n");
155 fprintf(ofp, " --loglevel-only name\n");
156 fprintf(ofp, " Tracepoint loglevel (only this loglevel)\n");
157 fprintf(ofp, "\n");
158 fprintf(ofp, " The loglevel or loglevel-only options should be\n");
159 fprintf(ofp, " combined with a tracepoint name or tracepoint\n");
160 fprintf(ofp, " wildcard.\n");
161 fprintf(ofp, " Available loglevels:\n");
162 fprintf(ofp, " (higher value is more verbose)\n");
163 fprintf(ofp, " TRACE_EMERG = 0\n");
164 fprintf(ofp, " TRACE_ALERT = 1\n");
165 fprintf(ofp, " TRACE_CRIT = 2\n");
166 fprintf(ofp, " TRACE_ERR = 3\n");
167 fprintf(ofp, " TRACE_WARNING = 4\n");
168 fprintf(ofp, " TRACE_NOTICE = 5\n");
169 fprintf(ofp, " TRACE_INFO = 6\n");
170 fprintf(ofp, " TRACE_DEBUG_SYSTEM = 7\n");
171 fprintf(ofp, " TRACE_DEBUG_PROGRAM = 8\n");
172 fprintf(ofp, " TRACE_DEBUG_PROCESS = 9\n");
173 fprintf(ofp, " TRACE_DEBUG_MODULE = 10\n");
174 fprintf(ofp, " TRACE_DEBUG_UNIT = 11\n");
175 fprintf(ofp, " TRACE_DEBUG_FUNCTION = 12\n");
176 fprintf(ofp, " TRACE_DEBUG_LINE = 13\n");
177 fprintf(ofp, " TRACE_DEBUG = 14\n");
178 fprintf(ofp, " (shortcuts such as \"system\" are allowed)\n");
179 fprintf(ofp, "\n");
180 fprintf(ofp, " Available JUL domain loglevels:\n");
181 fprintf(ofp, " JUL_OFF = INT32_MAX\n");
182 fprintf(ofp, " JUL_SEVERE = %d\n", LTTNG_LOGLEVEL_JUL_SEVERE);
183 fprintf(ofp, " JUL_WARNING = %d\n", LTTNG_LOGLEVEL_JUL_WARNING);
184 fprintf(ofp, " JUL_INFO = %d\n", LTTNG_LOGLEVEL_JUL_INFO);
185 fprintf(ofp, " JUL_CONFIG = %d\n", LTTNG_LOGLEVEL_JUL_CONFIG);
186 fprintf(ofp, " JUL_FINE = %d\n", LTTNG_LOGLEVEL_JUL_FINE);
187 fprintf(ofp, " JUL_FINER = %d\n", LTTNG_LOGLEVEL_JUL_FINER);
188 fprintf(ofp, " JUL_FINEST = %d\n", LTTNG_LOGLEVEL_JUL_FINEST);
189 fprintf(ofp, " JUL_ALL = INT32_MIN\n");
190 fprintf(ofp, " (shortcuts such as \"severe\" are allowed)\n");
191 fprintf(ofp, "\n");
192 fprintf(ofp, " Available LOG4j domain loglevels:\n");
193 fprintf(ofp, " LOG4J_OFF = INT32_MAX\n");
194 fprintf(ofp, " LOG4J_FATAL = %d\n", LTTNG_LOGLEVEL_LOG4J_FATAL);
195 fprintf(ofp, " LOG4J_ERROR = %d\n", LTTNG_LOGLEVEL_LOG4J_ERROR);
196 fprintf(ofp, " LOG4J_WARN = %d\n", LTTNG_LOGLEVEL_LOG4J_WARN);
197 fprintf(ofp, " LOG4J_INFO = %d\n", LTTNG_LOGLEVEL_LOG4J_INFO);
198 fprintf(ofp, " LOG4J_DEBUG = %d\n", LTTNG_LOGLEVEL_LOG4J_DEBUG);
199 fprintf(ofp, " LOG4J_TRACE = %d\n", LTTNG_LOGLEVEL_LOG4J_TRACE);
200 fprintf(ofp, " LOG4J_ALL = INT32_MIN\n");
201 fprintf(ofp, " (shortcuts such as \"severe\" are allowed)\n");
202 fprintf(ofp, "\n");
203 fprintf(ofp, " Available Python domain loglevels:\n");
204 fprintf(ofp, " PYTHON_CRITICAL = %d\n", LTTNG_LOGLEVEL_PYTHON_CRITICAL);
205 fprintf(ofp, " PYTHON_ERROR = %d\n", LTTNG_LOGLEVEL_PYTHON_ERROR);
206 fprintf(ofp, " PYTHON_WARNING = %d\n", LTTNG_LOGLEVEL_PYTHON_WARNING);
207 fprintf(ofp, " PYTHON_INFO = %d\n", LTTNG_LOGLEVEL_PYTHON_INFO);
208 fprintf(ofp, " PYTHON_DEBUG = %d\n", LTTNG_LOGLEVEL_PYTHON_DEBUG);
209 fprintf(ofp, " PYTHON_NOTSET = %d\n", LTTNG_LOGLEVEL_PYTHON_NOTSET);
210 fprintf(ofp, " (shortcuts such as \"critical\" are allowed)\n");
211 fprintf(ofp, "\n");
212 fprintf(ofp, " -f, --filter \'expression\'\n");
213 fprintf(ofp, " Filter expression on event fields and context.\n");
214 fprintf(ofp, " Event recording depends on evaluation.\n");
215 fprintf(ofp, " Only specify on first activation of\n");
216 fprintf(ofp, " a given event within a session.\n");
217 fprintf(ofp, " Filter only allowed when enabling\n");
218 fprintf(ofp, " events within a session before tracing\n");
219 fprintf(ofp, " is started. If the filter fails to link\n");
220 fprintf(ofp, " with the event within the traced domain,\n");
221 fprintf(ofp, " the event will be discarded. Currently,\n");
222 fprintf(ofp, " filter is only implemented for the user-space\n");
223 fprintf(ofp, " tracer.\n");
224 fprintf(ofp, " Expression examples:.\n");
225 fprintf(ofp, " \n");
226 fprintf(ofp, " 'intfield > 500 && intfield < 503'\n");
227 fprintf(ofp, " '(strfield == \"test\" || intfield != 10) && intfield > 33'\n");
228 fprintf(ofp, " 'doublefield > 1.1 && intfield < 5.3'\n");
229 fprintf(ofp, " \n");
230 fprintf(ofp, " Wildcards are allowed at the end of strings:\n");
231 fprintf(ofp, " 'seqfield1 == \"te*\"'\n");
232 fprintf(ofp, " In string literals, the escape character is '\\'.\n");
233 fprintf(ofp, " Use '\\*' for the '*' character, and '\\\\' for\n");
234 fprintf(ofp, " the '\\' character. Wildcard match any sequence of,\n");
235 fprintf(ofp, " characters including an empty sub-string (match 0 or\n");
236 fprintf(ofp, " more characters).\n");
237 fprintf(ofp, "\n");
238 fprintf(ofp, " Context information can be used for filtering. The\n");
239 fprintf(ofp, " examples below show usage of context filtering on\n");
240 fprintf(ofp, " process name (with a wildcard), process ID range, and\n");
241 fprintf(ofp, " unique thread ID for filtering. The process and\n");
242 fprintf(ofp, " thread ID of running applications can be found under\n");
243 fprintf(ofp, " columns \"PID\" and \"LWP\" of the \"ps -eLf\" command.\n");
244 fprintf(ofp, "\n");
245 fprintf(ofp, " '$ctx.procname == \"demo*\"'\n");
246 fprintf(ofp, " '$ctx.vpid >= 4433 && $ctx.vpid < 4455'\n");
247 fprintf(ofp, " '$ctx.vtid == 1234'\n");
248 fprintf(ofp, " -x, --exclude LIST\n");
249 fprintf(ofp, " Add exclusions to UST tracepoints:\n");
250 fprintf(ofp, " Events that match any of the items\n");
251 fprintf(ofp, " in the comma-separated LIST are not\n");
252 fprintf(ofp, " enabled, even if they match a wildcard\n");
253 fprintf(ofp, " definition of the event.\n");
254 fprintf(ofp, "\n");
255 }
256
257 /*
258 * Parse probe options.
259 */
260 static int parse_probe_opts(struct lttng_event *ev, char *opt)
261 {
262 int ret = CMD_SUCCESS;
263 int match;
264 char s_hex[19];
265 #define S_HEX_LEN_SCANF_IS_A_BROKEN_API "18" /* 18 is (19 - 1) (\0 is extra) */
266 char name[LTTNG_SYMBOL_NAME_LEN];
267
268 if (opt == NULL) {
269 ret = CMD_ERROR;
270 goto end;
271 }
272
273 /* Check for symbol+offset */
274 match = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API
275 "[^'+']+%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", name, s_hex);
276 if (match == 2) {
277 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
278 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
279 DBG("probe symbol %s", ev->attr.probe.symbol_name);
280 if (*s_hex == '\0') {
281 ERR("Invalid probe offset %s", s_hex);
282 ret = CMD_ERROR;
283 goto end;
284 }
285 ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
286 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
287 ev->attr.probe.addr = 0;
288 goto end;
289 }
290
291 /* Check for symbol */
292 if (isalpha(name[0])) {
293 match = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "s",
294 name);
295 if (match == 1) {
296 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
297 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
298 DBG("probe symbol %s", ev->attr.probe.symbol_name);
299 ev->attr.probe.offset = 0;
300 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
301 ev->attr.probe.addr = 0;
302 goto end;
303 }
304 }
305
306 /* Check for address */
307 match = sscanf(opt, "%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", s_hex);
308 if (match > 0) {
309 if (*s_hex == '\0') {
310 ERR("Invalid probe address %s", s_hex);
311 ret = CMD_ERROR;
312 goto end;
313 }
314 ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
315 DBG("probe addr %" PRIu64, ev->attr.probe.addr);
316 ev->attr.probe.offset = 0;
317 memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
318 goto end;
319 }
320
321 /* No match */
322 ret = CMD_ERROR;
323
324 end:
325 return ret;
326 }
327
328 /*
329 * Maps LOG4j loglevel from string to value
330 */
331 static int loglevel_log4j_str_to_value(const char *inputstr)
332 {
333 int i = 0;
334 char str[LTTNG_SYMBOL_NAME_LEN];
335
336 /*
337 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
338 * added at the end of the loop so a the upper bound we avoid the overflow.
339 */
340 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
341 str[i] = toupper(inputstr[i]);
342 i++;
343 }
344 str[i] = '\0';
345
346 if (!strcmp(str, "LOG4J_OFF") || !strcmp(str, "OFF")) {
347 return LTTNG_LOGLEVEL_LOG4J_OFF;
348 } else if (!strcmp(str, "LOG4J_FATAL") || !strcmp(str, "FATAL")) {
349 return LTTNG_LOGLEVEL_LOG4J_FATAL;
350 } else if (!strcmp(str, "LOG4J_ERROR") || !strcmp(str, "ERROR")) {
351 return LTTNG_LOGLEVEL_LOG4J_ERROR;
352 } else if (!strcmp(str, "LOG4J_WARN") || !strcmp(str, "WARN")) {
353 return LTTNG_LOGLEVEL_LOG4J_WARN;
354 } else if (!strcmp(str, "LOG4J_INFO") || !strcmp(str, "INFO")) {
355 return LTTNG_LOGLEVEL_LOG4J_INFO;
356 } else if (!strcmp(str, "LOG4J_DEBUG") || !strcmp(str, "DEBUG")) {
357 return LTTNG_LOGLEVEL_LOG4J_DEBUG;
358 } else if (!strcmp(str, "LOG4J_TRACE") || !strcmp(str, "TRACE")) {
359 return LTTNG_LOGLEVEL_LOG4J_TRACE;
360 } else if (!strcmp(str, "LOG4J_ALL") || !strcmp(str, "ALL")) {
361 return LTTNG_LOGLEVEL_LOG4J_ALL;
362 } else {
363 return -1;
364 }
365 }
366
367 /*
368 * Maps JUL loglevel from string to value
369 */
370 static int loglevel_jul_str_to_value(const char *inputstr)
371 {
372 int i = 0;
373 char str[LTTNG_SYMBOL_NAME_LEN];
374
375 /*
376 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
377 * added at the end of the loop so a the upper bound we avoid the overflow.
378 */
379 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
380 str[i] = toupper(inputstr[i]);
381 i++;
382 }
383 str[i] = '\0';
384
385 if (!strcmp(str, "JUL_OFF") || !strcmp(str, "OFF")) {
386 return LTTNG_LOGLEVEL_JUL_OFF;
387 } else if (!strcmp(str, "JUL_SEVERE") || !strcmp(str, "SEVERE")) {
388 return LTTNG_LOGLEVEL_JUL_SEVERE;
389 } else if (!strcmp(str, "JUL_WARNING") || !strcmp(str, "WARNING")) {
390 return LTTNG_LOGLEVEL_JUL_WARNING;
391 } else if (!strcmp(str, "JUL_INFO") || !strcmp(str, "INFO")) {
392 return LTTNG_LOGLEVEL_JUL_INFO;
393 } else if (!strcmp(str, "JUL_CONFIG") || !strcmp(str, "CONFIG")) {
394 return LTTNG_LOGLEVEL_JUL_CONFIG;
395 } else if (!strcmp(str, "JUL_FINE") || !strcmp(str, "FINE")) {
396 return LTTNG_LOGLEVEL_JUL_FINE;
397 } else if (!strcmp(str, "JUL_FINER") || !strcmp(str, "FINER")) {
398 return LTTNG_LOGLEVEL_JUL_FINER;
399 } else if (!strcmp(str, "JUL_FINEST") || !strcmp(str, "FINEST")) {
400 return LTTNG_LOGLEVEL_JUL_FINEST;
401 } else if (!strcmp(str, "JUL_ALL") || !strcmp(str, "ALL")) {
402 return LTTNG_LOGLEVEL_JUL_ALL;
403 } else {
404 return -1;
405 }
406 }
407
408 /*
409 * Maps Python loglevel from string to value
410 */
411 static int loglevel_python_str_to_value(const char *inputstr)
412 {
413 int i = 0;
414 char str[LTTNG_SYMBOL_NAME_LEN];
415
416 /*
417 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
418 * added at the end of the loop so a the upper bound we avoid the overflow.
419 */
420 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
421 str[i] = toupper(inputstr[i]);
422 i++;
423 }
424 str[i] = '\0';
425
426 if (!strcmp(str, "PYTHON_CRITICAL") || !strcmp(str, "CRITICAL")) {
427 return LTTNG_LOGLEVEL_PYTHON_CRITICAL;
428 } else if (!strcmp(str, "PYTHON_ERROR") || !strcmp(str, "ERROR")) {
429 return LTTNG_LOGLEVEL_PYTHON_ERROR;
430 } else if (!strcmp(str, "PYTHON_WARNING") || !strcmp(str, "WARNING")) {
431 return LTTNG_LOGLEVEL_PYTHON_WARNING;
432 } else if (!strcmp(str, "PYTHON_INFO") || !strcmp(str, "INFO")) {
433 return LTTNG_LOGLEVEL_PYTHON_INFO;
434 } else if (!strcmp(str, "PYTNON_DEBUG") || !strcmp(str, "DEBUG")) {
435 return LTTNG_LOGLEVEL_PYTHON_DEBUG;
436 } else if (!strcmp(str, "PYTHON_NOTSET") || !strcmp(str, "NOTSET")) {
437 return LTTNG_LOGLEVEL_PYTHON_NOTSET;
438 } else {
439 return -1;
440 }
441 }
442
443 /*
444 * Maps loglevel from string to value
445 */
446 static
447 int loglevel_str_to_value(const char *inputstr)
448 {
449 int i = 0;
450 char str[LTTNG_SYMBOL_NAME_LEN];
451
452 /*
453 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
454 * added at the end of the loop so a the upper bound we avoid the overflow.
455 */
456 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
457 str[i] = toupper(inputstr[i]);
458 i++;
459 }
460 str[i] = '\0';
461 if (!strcmp(str, "TRACE_EMERG") || !strcmp(str, "EMERG")) {
462 return LTTNG_LOGLEVEL_EMERG;
463 } else if (!strcmp(str, "TRACE_ALERT") || !strcmp(str, "ALERT")) {
464 return LTTNG_LOGLEVEL_ALERT;
465 } else if (!strcmp(str, "TRACE_CRIT") || !strcmp(str, "CRIT")) {
466 return LTTNG_LOGLEVEL_CRIT;
467 } else if (!strcmp(str, "TRACE_ERR") || !strcmp(str, "ERR")) {
468 return LTTNG_LOGLEVEL_ERR;
469 } else if (!strcmp(str, "TRACE_WARNING") || !strcmp(str, "WARNING")) {
470 return LTTNG_LOGLEVEL_WARNING;
471 } else if (!strcmp(str, "TRACE_NOTICE") || !strcmp(str, "NOTICE")) {
472 return LTTNG_LOGLEVEL_NOTICE;
473 } else if (!strcmp(str, "TRACE_INFO") || !strcmp(str, "INFO")) {
474 return LTTNG_LOGLEVEL_INFO;
475 } else if (!strcmp(str, "TRACE_DEBUG_SYSTEM") || !strcmp(str, "DEBUG_SYSTEM") || !strcmp(str, "SYSTEM")) {
476 return LTTNG_LOGLEVEL_DEBUG_SYSTEM;
477 } else if (!strcmp(str, "TRACE_DEBUG_PROGRAM") || !strcmp(str, "DEBUG_PROGRAM") || !strcmp(str, "PROGRAM")) {
478 return LTTNG_LOGLEVEL_DEBUG_PROGRAM;
479 } else if (!strcmp(str, "TRACE_DEBUG_PROCESS") || !strcmp(str, "DEBUG_PROCESS") || !strcmp(str, "PROCESS")) {
480 return LTTNG_LOGLEVEL_DEBUG_PROCESS;
481 } else if (!strcmp(str, "TRACE_DEBUG_MODULE") || !strcmp(str, "DEBUG_MODULE") || !strcmp(str, "MODULE")) {
482 return LTTNG_LOGLEVEL_DEBUG_MODULE;
483 } else if (!strcmp(str, "TRACE_DEBUG_UNIT") || !strcmp(str, "DEBUG_UNIT") || !strcmp(str, "UNIT")) {
484 return LTTNG_LOGLEVEL_DEBUG_UNIT;
485 } else if (!strcmp(str, "TRACE_DEBUG_FUNCTION") || !strcmp(str, "DEBUG_FUNCTION") || !strcmp(str, "FUNCTION")) {
486 return LTTNG_LOGLEVEL_DEBUG_FUNCTION;
487 } else if (!strcmp(str, "TRACE_DEBUG_LINE") || !strcmp(str, "DEBUG_LINE") || !strcmp(str, "LINE")) {
488 return LTTNG_LOGLEVEL_DEBUG_LINE;
489 } else if (!strcmp(str, "TRACE_DEBUG") || !strcmp(str, "DEBUG")) {
490 return LTTNG_LOGLEVEL_DEBUG;
491 } else {
492 return -1;
493 }
494 }
495
496 static
497 const char *print_channel_name(const char *name)
498 {
499 return name ? : DEFAULT_CHANNEL_NAME;
500 }
501
502 static
503 const char *print_raw_channel_name(const char *name)
504 {
505 return name ? : "<default>";
506 }
507
508 /*
509 * Mi print exlcusion list
510 */
511 static
512 int mi_print_exclusion(int count, char **names)
513 {
514 int i, ret;
515
516 assert(writer);
517
518 if (count == 0) {
519 ret = 0;
520 goto end;
521 }
522 ret = mi_lttng_writer_open_element(writer, config_element_exclusions);
523 if (ret) {
524 goto end;
525 }
526
527 for (i = 0; i < count; i++) {
528 ret = mi_lttng_writer_write_element_string(writer,
529 config_element_exclusion, names[i]);
530 if (ret) {
531 goto end;
532 }
533 }
534
535 /* Close exclusions element */
536 ret = mi_lttng_writer_close_element(writer);
537
538 end:
539 return ret;
540 }
541
542 /*
543 * Return allocated string for pretty-printing exclusion names.
544 */
545 static
546 char *print_exclusions(int count, char **names)
547 {
548 int length = 0;
549 int i;
550 const char *preamble = " excluding ";
551 char *ret;
552
553 if (count == 0) {
554 return strdup("");
555 }
556
557 /* calculate total required length */
558 for (i = 0; i < count; i++) {
559 length += strlen(names[i]) + 1;
560 }
561
562 /* add length of preamble + one for NUL - one for last (missing) comma */
563 length += strlen(preamble);
564 ret = malloc(length);
565 strncpy(ret, preamble, length);
566 for (i = 0; i < count; i++) {
567 strcat(ret, names[i]);
568 if (i != count - 1) {
569 strcat(ret, ",");
570 }
571 }
572
573 return ret;
574 }
575
576 /*
577 * Compare list of exclusions against an event name.
578 * Return a list of legal exclusion names.
579 * Produce an error or a warning about others (depending on the situation)
580 */
581 static
582 int check_exclusion_subsets(const char *event_name,
583 const char *exclusions,
584 int *exclusion_count_ptr,
585 char ***exclusion_list_ptr)
586 {
587 const char *excluder_ptr;
588 const char *event_ptr;
589 const char *next_excluder;
590 int excluder_length;
591 int exclusion_count = 0;
592 char **exclusion_list = NULL;
593 int ret = CMD_SUCCESS;
594
595 if (event_name[strlen(event_name) - 1] != '*') {
596 ERR("Event %s: Excluders can only be used with wildcarded events", event_name);
597 goto error;
598 }
599
600 next_excluder = exclusions;
601 while (*next_excluder != 0) {
602 event_ptr = event_name;
603 excluder_ptr = next_excluder;
604 excluder_length = strcspn(next_excluder, ",");
605
606 /* Scan both the excluder and the event letter by letter */
607 while (1) {
608 char e, x;
609
610 e = *event_ptr;
611 x = *excluder_ptr;
612
613 if (x == '*') {
614 /* Event is a subset of the excluder */
615 ERR("Event %s: %.*s excludes all events from %s",
616 event_name,
617 excluder_length,
618 next_excluder,
619 event_name);
620 goto error;
621 }
622 if (e == '*') {
623 /* Excluder is a proper subset of event */
624 exclusion_count++;
625 exclusion_list = realloc(exclusion_list, sizeof(char **) * exclusion_count);
626 exclusion_list[exclusion_count - 1] = strndup(next_excluder, excluder_length);
627
628 break;
629 }
630 if (x != e) {
631 /* Excluder and event sets have no common elements */
632 WARN("Event %s: %.*s does not exclude any events from %s",
633 event_name,
634 excluder_length,
635 next_excluder,
636 event_name);
637 break;
638 }
639 excluder_ptr++;
640 event_ptr++;
641 }
642 /* next excluder */
643 next_excluder += excluder_length;
644 if (*next_excluder == ',') {
645 next_excluder++;
646 }
647 }
648 goto end;
649 error:
650 while (exclusion_count--) {
651 free(exclusion_list[exclusion_count]);
652 }
653 if (exclusion_list != NULL) {
654 free(exclusion_list);
655 }
656 exclusion_list = NULL;
657 exclusion_count = 0;
658 ret = CMD_ERROR;
659 end:
660 *exclusion_count_ptr = exclusion_count;
661 *exclusion_list_ptr = exclusion_list;
662 return ret;
663 }
664 /*
665 * Enabling event using the lttng API.
666 * Note: in case of error only the last error code will be return.
667 */
668 static int enable_events(char *session_name)
669 {
670 int ret = CMD_SUCCESS, command_ret = CMD_SUCCESS;
671 int error_holder = CMD_SUCCESS, warn = 0, error = 0, success = 1;
672 char *event_name, *channel_name = NULL;
673 struct lttng_event ev;
674 struct lttng_domain dom;
675 int exclusion_count = 0;
676 char **exclusion_list = NULL;
677
678 memset(&ev, 0, sizeof(ev));
679 memset(&dom, 0, sizeof(dom));
680
681 if (opt_kernel) {
682 if (opt_filter) {
683 ERR("Filter not implement for kernel tracing yet");
684 ret = CMD_ERROR;
685 goto error;
686 }
687 if (opt_loglevel) {
688 WARN("Kernel loglevels are not supported.");
689 }
690 }
691
692 /* Create lttng domain */
693 if (opt_kernel) {
694 dom.type = LTTNG_DOMAIN_KERNEL;
695 dom.buf_type = LTTNG_BUFFER_GLOBAL;
696 } else if (opt_userspace) {
697 dom.type = LTTNG_DOMAIN_UST;
698 /* Default. */
699 dom.buf_type = LTTNG_BUFFER_PER_UID;
700 } else if (opt_jul) {
701 dom.type = LTTNG_DOMAIN_JUL;
702 /* Default. */
703 dom.buf_type = LTTNG_BUFFER_PER_UID;
704 } else if (opt_log4j) {
705 dom.type = LTTNG_DOMAIN_LOG4J;
706 /* Default. */
707 dom.buf_type = LTTNG_BUFFER_PER_UID;
708 } else if (opt_python) {
709 dom.type = LTTNG_DOMAIN_PYTHON;
710 /* Default. */
711 dom.buf_type = LTTNG_BUFFER_PER_UID;
712 } else {
713 print_missing_domain();
714 ret = CMD_ERROR;
715 goto error;
716 }
717
718 if (opt_kernel && opt_exclude) {
719 ERR("Event name exclusions are not yet implemented for kernel events");
720 ret = CMD_ERROR;
721 goto error;
722 }
723
724 channel_name = opt_channel_name;
725
726 handle = lttng_create_handle(session_name, &dom);
727 if (handle == NULL) {
728 ret = -1;
729 goto error;
730 }
731
732 /* Prepare Mi */
733 if (lttng_opt_mi) {
734 /* Open a events element */
735 ret = mi_lttng_writer_open_element(writer, config_element_events);
736 if (ret) {
737 ret = CMD_ERROR;
738 goto error;
739 }
740 }
741
742 if (opt_enable_all) {
743 /* Default setup for enable all */
744 if (opt_kernel) {
745 ev.type = opt_event_type;
746 ev.name[0] = '\0';
747 /* kernel loglevels not implemented */
748 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
749 } else {
750 ev.type = LTTNG_EVENT_TRACEPOINT;
751 strcpy(ev.name, "*");
752 ev.loglevel_type = opt_loglevel_type;
753 if (opt_loglevel) {
754 assert(opt_userspace || opt_jul || opt_log4j || opt_python);
755 if (opt_userspace) {
756 ev.loglevel = loglevel_str_to_value(opt_loglevel);
757 } else if (opt_jul) {
758 ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
759 } else if (opt_log4j) {
760 ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
761 } else if (opt_python) {
762 ev.loglevel = loglevel_python_str_to_value(opt_loglevel);
763 }
764 if (ev.loglevel == -1) {
765 ERR("Unknown loglevel %s", opt_loglevel);
766 ret = -LTTNG_ERR_INVALID;
767 goto error;
768 }
769 } else {
770 assert(opt_userspace || opt_jul || opt_log4j || opt_python);
771 if (opt_userspace) {
772 ev.loglevel = -1;
773 } else if (opt_jul || opt_log4j) {
774 ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
775 } else if (opt_python) {
776 ev.loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG;
777 }
778 }
779 }
780
781 if (opt_exclude) {
782 ret = check_exclusion_subsets("*", opt_exclude,
783 &exclusion_count, &exclusion_list);
784 if (ret == CMD_ERROR) {
785 goto error;
786 }
787 ev.exclusion = 1;
788 }
789 if (!opt_filter) {
790 ret = lttng_enable_event_with_exclusions(handle,
791 &ev, channel_name,
792 NULL,
793 exclusion_count, exclusion_list);
794 if (ret < 0) {
795 switch (-ret) {
796 case LTTNG_ERR_KERN_EVENT_EXIST:
797 WARN("Kernel events already enabled (channel %s, session %s)",
798 print_channel_name(channel_name), session_name);
799 warn = 1;
800 break;
801 case LTTNG_ERR_TRACE_ALREADY_STARTED:
802 {
803 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
804 ERR("Events: %s (channel %s, session %s)",
805 msg,
806 print_channel_name(channel_name),
807 session_name);
808 error = 1;
809 break;
810 }
811 default:
812 ERR("Events: %s (channel %s, session %s)",
813 lttng_strerror(ret),
814 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
815 ? print_raw_channel_name(channel_name)
816 : print_channel_name(channel_name),
817 session_name);
818 error = 1;
819 break;
820 }
821 goto end;
822 }
823
824 switch (opt_event_type) {
825 case LTTNG_EVENT_TRACEPOINT:
826 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
827 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
828 MSG("All %s tracepoints%s are enabled in channel %s for loglevel %s",
829 get_domain_str(dom.type),
830 exclusion_string,
831 print_channel_name(channel_name),
832 opt_loglevel);
833 free(exclusion_string);
834 } else {
835 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
836 MSG("All %s tracepoints%s are enabled in channel %s",
837 get_domain_str(dom.type),
838 exclusion_string,
839 print_channel_name(channel_name));
840 free(exclusion_string);
841 }
842 break;
843 case LTTNG_EVENT_SYSCALL:
844 if (opt_kernel) {
845 MSG("All %s system calls are enabled in channel %s",
846 get_domain_str(dom.type),
847 print_channel_name(channel_name));
848 }
849 break;
850 case LTTNG_EVENT_ALL:
851 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
852 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
853 MSG("All %s events%s are enabled in channel %s for loglevel %s",
854 get_domain_str(dom.type),
855 exclusion_string,
856 print_channel_name(channel_name),
857 opt_loglevel);
858 free(exclusion_string);
859 } else {
860 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
861 MSG("All %s events%s are enabled in channel %s",
862 get_domain_str(dom.type),
863 exclusion_string,
864 print_channel_name(channel_name));
865 free(exclusion_string);
866 }
867 break;
868 default:
869 /*
870 * We should not be here since lttng_enable_event should have
871 * failed on the event type.
872 */
873 goto error;
874 }
875 }
876
877 if (opt_filter) {
878 command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
879 opt_filter, exclusion_count, exclusion_list);
880 if (command_ret < 0) {
881 switch (-command_ret) {
882 case LTTNG_ERR_FILTER_EXIST:
883 WARN("Filter on all events is already enabled"
884 " (channel %s, session %s)",
885 print_channel_name(channel_name), session_name);
886 warn = 1;
887 break;
888 case LTTNG_ERR_TRACE_ALREADY_STARTED:
889 {
890 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
891 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
892 msg,
893 print_channel_name(channel_name),
894 session_name, opt_filter);
895 error = 1;
896 break;
897 }
898 default:
899 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
900 lttng_strerror(command_ret),
901 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
902 ? print_raw_channel_name(channel_name)
903 : print_channel_name(channel_name),
904 session_name, opt_filter);
905 error = 1;
906 break;
907 }
908 error_holder = command_ret;
909 } else {
910 ev.filter = 1;
911 MSG("Filter '%s' successfully set", opt_filter);
912 }
913 }
914
915 if (lttng_opt_mi) {
916 /* The wildcard * is used for kernel and ust domain to
917 * represent ALL. We copy * in event name to force the wildcard use
918 * for kernel domain
919 *
920 * Note: this is strictly for semantic and printing while in
921 * machine interface mode.
922 */
923 strcpy(ev.name, "*");
924
925 /* If we reach here the events are enabled */
926 if (!error && !warn) {
927 ev.enabled = 1;
928 } else {
929 ev.enabled = 0;
930 success = 0;
931 }
932 ret = mi_lttng_event(writer, &ev, 1, handle->domain.type);
933 if (ret) {
934 ret = CMD_ERROR;
935 goto error;
936 }
937
938 /* print exclusion */
939 ret = mi_print_exclusion(exclusion_count, exclusion_list);
940 if (ret) {
941 ret = CMD_ERROR;
942 goto error;
943 }
944
945 /* Success ? */
946 ret = mi_lttng_writer_write_element_bool(writer,
947 mi_lttng_element_command_success, success);
948 if (ret) {
949 ret = CMD_ERROR;
950 goto error;
951 }
952
953 /* Close event element */
954 ret = mi_lttng_writer_close_element(writer);
955 if (ret) {
956 ret = CMD_ERROR;
957 goto error;
958 }
959 }
960
961 goto end;
962 }
963
964 /* Strip event list */
965 event_name = strtok(opt_event_list, ",");
966 while (event_name != NULL) {
967 /* Copy name and type of the event */
968 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
969 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
970 ev.type = opt_event_type;
971
972 /* Kernel tracer action */
973 if (opt_kernel) {
974 DBG("Enabling kernel event %s for channel %s",
975 event_name,
976 print_channel_name(channel_name));
977
978 switch (opt_event_type) {
979 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
980 ev.type = LTTNG_EVENT_TRACEPOINT;
981 /* Fall-through */
982 case LTTNG_EVENT_TRACEPOINT:
983 break;
984 case LTTNG_EVENT_PROBE:
985 ret = parse_probe_opts(&ev, opt_probe);
986 if (ret) {
987 ERR("Unable to parse probe options");
988 ret = 0;
989 goto error;
990 }
991 break;
992 case LTTNG_EVENT_FUNCTION:
993 ret = parse_probe_opts(&ev, opt_function);
994 if (ret) {
995 ERR("Unable to parse function probe options");
996 ret = 0;
997 goto error;
998 }
999 break;
1000 case LTTNG_EVENT_FUNCTION_ENTRY:
1001 strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
1002 LTTNG_SYMBOL_NAME_LEN);
1003 ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
1004 break;
1005 case LTTNG_EVENT_SYSCALL:
1006 ev.type = LTTNG_EVENT_SYSCALL;
1007 break;
1008 default:
1009 ret = CMD_UNDEFINED;
1010 goto error;
1011 }
1012
1013 /* kernel loglevels not implemented */
1014 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
1015 } else if (opt_userspace) { /* User-space tracer action */
1016 #if 0
1017 if (opt_cmd_name != NULL || opt_pid) {
1018 MSG("Only supporting tracing all UST processes (-u) for now.");
1019 ret = CMD_UNDEFINED;
1020 goto error;
1021 }
1022 #endif
1023
1024 DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
1025 print_channel_name(channel_name), opt_loglevel ? : "<all>");
1026
1027 switch (opt_event_type) {
1028 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
1029 /* Fall-through */
1030 case LTTNG_EVENT_TRACEPOINT:
1031 /* Copy name and type of the event */
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 break;
1036 case LTTNG_EVENT_PROBE:
1037 case LTTNG_EVENT_FUNCTION:
1038 case LTTNG_EVENT_FUNCTION_ENTRY:
1039 case LTTNG_EVENT_SYSCALL:
1040 default:
1041 ERR("Event type not available for user-space tracing");
1042 ret = CMD_UNSUPPORTED;
1043 goto error;
1044 }
1045
1046 if (opt_exclude) {
1047 ev.exclusion = 1;
1048 if (opt_event_type != LTTNG_EVENT_ALL && opt_event_type != LTTNG_EVENT_TRACEPOINT) {
1049 ERR("Exclusion option can only be used with tracepoint events");
1050 ret = CMD_ERROR;
1051 goto error;
1052 }
1053 /* Free previously allocated items */
1054 if (exclusion_list != NULL) {
1055 while (exclusion_count--) {
1056 free(exclusion_list[exclusion_count]);
1057 }
1058 free(exclusion_list);
1059 exclusion_list = NULL;
1060 }
1061 /* Check for proper subsets */
1062 ret = check_exclusion_subsets(event_name, opt_exclude,
1063 &exclusion_count, &exclusion_list);
1064 if (ret == CMD_ERROR) {
1065 goto error;
1066 }
1067 }
1068
1069 ev.loglevel_type = opt_loglevel_type;
1070 if (opt_loglevel) {
1071 ev.loglevel = loglevel_str_to_value(opt_loglevel);
1072 if (ev.loglevel == -1) {
1073 ERR("Unknown loglevel %s", opt_loglevel);
1074 ret = -LTTNG_ERR_INVALID;
1075 goto error;
1076 }
1077 } else {
1078 ev.loglevel = -1;
1079 }
1080 } else if (opt_jul || opt_log4j || opt_python) {
1081 if (opt_event_type != LTTNG_EVENT_ALL &&
1082 opt_event_type != LTTNG_EVENT_TRACEPOINT) {
1083 ERR("Event type not supported for domain.");
1084 ret = CMD_UNSUPPORTED;
1085 goto error;
1086 }
1087
1088 ev.loglevel_type = opt_loglevel_type;
1089 if (opt_loglevel) {
1090 if (opt_jul) {
1091 ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
1092 } else if (opt_log4j) {
1093 ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
1094 } else if (opt_python) {
1095 ev.loglevel = loglevel_python_str_to_value(opt_loglevel);
1096 }
1097 if (ev.loglevel == -1) {
1098 ERR("Unknown loglevel %s", opt_loglevel);
1099 ret = -LTTNG_ERR_INVALID;
1100 goto error;
1101 }
1102 } else {
1103 if (opt_jul) {
1104 ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
1105 } else if (opt_log4j) {
1106 ev.loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
1107 } else if (opt_python) {
1108 ev.loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG;
1109 }
1110 }
1111 ev.type = LTTNG_EVENT_TRACEPOINT;
1112 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
1113 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
1114 } else {
1115 print_missing_domain();
1116 ret = CMD_ERROR;
1117 goto error;
1118 }
1119
1120 if (!opt_filter) {
1121 char *exclusion_string;
1122
1123 command_ret = lttng_enable_event_with_exclusions(handle,
1124 &ev, channel_name,
1125 NULL, exclusion_count, exclusion_list);
1126 exclusion_string = print_exclusions(exclusion_count, exclusion_list);
1127 if (command_ret < 0) {
1128 /* Turn ret to positive value to handle the positive error code */
1129 switch (-command_ret) {
1130 case LTTNG_ERR_KERN_EVENT_EXIST:
1131 WARN("Kernel event %s%s already enabled (channel %s, session %s)",
1132 event_name,
1133 exclusion_string,
1134 print_channel_name(channel_name), session_name);
1135 warn = 1;
1136 break;
1137 case LTTNG_ERR_TRACE_ALREADY_STARTED:
1138 {
1139 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
1140 ERR("Event %s%s: %s (channel %s, session %s)", event_name,
1141 exclusion_string,
1142 msg,
1143 print_channel_name(channel_name),
1144 session_name);
1145 error = 1;
1146 break;
1147 }
1148 default:
1149 ERR("Event %s%s: %s (channel %s, session %s)", event_name,
1150 exclusion_string,
1151 lttng_strerror(command_ret),
1152 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
1153 ? print_raw_channel_name(channel_name)
1154 : print_channel_name(channel_name),
1155 session_name);
1156 error = 1;
1157 break;
1158 }
1159 error_holder = command_ret;
1160 } else {
1161 /* So we don't print the default channel name for agent domain. */
1162 if (dom.type == LTTNG_DOMAIN_JUL ||
1163 dom.type == LTTNG_DOMAIN_LOG4J) {
1164 MSG("%s event %s%s enabled.",
1165 get_domain_str(dom.type), event_name,
1166 exclusion_string);
1167 } else {
1168 MSG("%s event %s%s created in channel %s",
1169 get_domain_str(dom.type), event_name,
1170 exclusion_string,
1171 print_channel_name(channel_name));
1172 }
1173 }
1174 free(exclusion_string);
1175 }
1176
1177 if (opt_filter) {
1178 char *exclusion_string;
1179
1180 /* Filter present */
1181 ev.filter = 1;
1182
1183 command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
1184 opt_filter, exclusion_count, exclusion_list);
1185 exclusion_string = print_exclusions(exclusion_count, exclusion_list);
1186
1187 if (command_ret < 0) {
1188 switch (-command_ret) {
1189 case LTTNG_ERR_FILTER_EXIST:
1190 WARN("Filter on event %s%s is already enabled"
1191 " (channel %s, session %s)",
1192 event_name,
1193 exclusion_string,
1194 print_channel_name(channel_name), session_name);
1195 warn = 1;
1196 break;
1197 case LTTNG_ERR_TRACE_ALREADY_STARTED:
1198 {
1199 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
1200 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
1201 exclusion_string,
1202 msg,
1203 print_channel_name(channel_name),
1204 session_name, opt_filter);
1205 error = 1;
1206 break;
1207 }
1208 default:
1209 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
1210 exclusion_string,
1211 lttng_strerror(command_ret),
1212 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
1213 ? print_raw_channel_name(channel_name)
1214 : print_channel_name(channel_name),
1215 session_name, opt_filter);
1216 error = 1;
1217 break;
1218 }
1219 error_holder = command_ret;
1220
1221 } else {
1222 MSG("Event %s%s: Filter '%s' successfully set",
1223 event_name, exclusion_string,
1224 opt_filter);
1225 }
1226 free(exclusion_string);
1227 }
1228
1229 if (lttng_opt_mi) {
1230 if (command_ret) {
1231 success = 0;
1232 ev.enabled = 0;
1233 } else {
1234 ev.enabled = 1;
1235 }
1236
1237 ret = mi_lttng_event(writer, &ev, 1, handle->domain.type);
1238 if (ret) {
1239 ret = CMD_ERROR;
1240 goto error;
1241 }
1242
1243 /* print exclusion */
1244 ret = mi_print_exclusion(exclusion_count, exclusion_list);
1245 if (ret) {
1246 ret = CMD_ERROR;
1247 goto error;
1248 }
1249
1250 /* Success ? */
1251 ret = mi_lttng_writer_write_element_bool(writer,
1252 mi_lttng_element_command_success, success);
1253 if (ret) {
1254 ret = CMD_ERROR;
1255 goto end;
1256 }
1257
1258 /* Close event element */
1259 ret = mi_lttng_writer_close_element(writer);
1260 if (ret) {
1261 ret = CMD_ERROR;
1262 goto end;
1263 }
1264 }
1265
1266 /* Next event */
1267 event_name = strtok(NULL, ",");
1268 /* Reset warn, error and success */
1269 success = 1;
1270 }
1271
1272 end:
1273 /* Close Mi */
1274 if (lttng_opt_mi) {
1275 /* Close events element */
1276 ret = mi_lttng_writer_close_element(writer);
1277 if (ret) {
1278 ret = CMD_ERROR;
1279 goto error;
1280 }
1281 }
1282 error:
1283 if (warn) {
1284 ret = CMD_WARNING;
1285 }
1286 if (error) {
1287 ret = CMD_ERROR;
1288 }
1289 lttng_destroy_handle(handle);
1290
1291 if (exclusion_list != NULL) {
1292 while (exclusion_count--) {
1293 free(exclusion_list[exclusion_count]);
1294 }
1295 free(exclusion_list);
1296 }
1297
1298 /* Overwrite ret with error_holder if there was an actual error with
1299 * enabling an event.
1300 */
1301 ret = error_holder ? error_holder : ret;
1302
1303 return ret;
1304 }
1305
1306 /*
1307 * Add event to trace session
1308 */
1309 int cmd_enable_events(int argc, const char **argv)
1310 {
1311 int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
1312 static poptContext pc;
1313 char *session_name = NULL;
1314 int event_type = -1;
1315
1316 pc = poptGetContext(NULL, argc, argv, long_options, 0);
1317 poptReadDefaultConfig(pc, 0);
1318
1319 /* Default event type */
1320 opt_event_type = LTTNG_EVENT_ALL;
1321
1322 while ((opt = poptGetNextOpt(pc)) != -1) {
1323 switch (opt) {
1324 case OPT_HELP:
1325 usage(stdout);
1326 goto end;
1327 case OPT_TRACEPOINT:
1328 opt_event_type = LTTNG_EVENT_TRACEPOINT;
1329 break;
1330 case OPT_PROBE:
1331 opt_event_type = LTTNG_EVENT_PROBE;
1332 break;
1333 case OPT_FUNCTION:
1334 opt_event_type = LTTNG_EVENT_FUNCTION;
1335 break;
1336 case OPT_FUNCTION_ENTRY:
1337 opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
1338 break;
1339 case OPT_SYSCALL:
1340 opt_event_type = LTTNG_EVENT_SYSCALL;
1341 break;
1342 case OPT_USERSPACE:
1343 opt_userspace = 1;
1344 break;
1345 case OPT_LOGLEVEL:
1346 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
1347 opt_loglevel = poptGetOptArg(pc);
1348 break;
1349 case OPT_LOGLEVEL_ONLY:
1350 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
1351 opt_loglevel = poptGetOptArg(pc);
1352 break;
1353 case OPT_LIST_OPTIONS:
1354 list_cmd_options(stdout, long_options);
1355 goto end;
1356 case OPT_FILTER:
1357 break;
1358 case OPT_EXCLUDE:
1359 break;
1360 default:
1361 usage(stderr);
1362 ret = CMD_UNDEFINED;
1363 goto end;
1364 }
1365
1366 /* Validate event type. Multiple event type are not supported. */
1367 if (event_type == -1) {
1368 event_type = opt_event_type;
1369 } else {
1370 if (event_type != opt_event_type) {
1371 ERR("Multiple event type not supported.");
1372 ret = CMD_ERROR;
1373 goto end;
1374 }
1375 }
1376 }
1377
1378 /* Mi check */
1379 if (lttng_opt_mi) {
1380 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
1381 if (!writer) {
1382 ret = -LTTNG_ERR_NOMEM;
1383 goto end;
1384 }
1385
1386 /* Open command element */
1387 ret = mi_lttng_writer_command_open(writer,
1388 mi_lttng_element_command_enable_event);
1389 if (ret) {
1390 ret = CMD_ERROR;
1391 goto end;
1392 }
1393
1394 /* Open output element */
1395 ret = mi_lttng_writer_open_element(writer,
1396 mi_lttng_element_command_output);
1397 if (ret) {
1398 ret = CMD_ERROR;
1399 goto end;
1400 }
1401 }
1402
1403 opt_event_list = (char*) poptGetArg(pc);
1404 if (opt_event_list == NULL && opt_enable_all == 0) {
1405 ERR("Missing event name(s).\n");
1406 usage(stderr);
1407 ret = CMD_ERROR;
1408 goto end;
1409 }
1410
1411 if (!opt_session_name) {
1412 session_name = get_session_name();
1413 if (session_name == NULL) {
1414 command_ret = CMD_ERROR;
1415 success = 0;
1416 goto mi_closing;
1417 }
1418 } else {
1419 session_name = opt_session_name;
1420 }
1421
1422 command_ret = enable_events(session_name);
1423 if (command_ret) {
1424 success = 0;
1425 goto mi_closing;
1426 }
1427
1428 mi_closing:
1429 /* Mi closing */
1430 if (lttng_opt_mi) {
1431 /* Close output element */
1432 ret = mi_lttng_writer_close_element(writer);
1433 if (ret) {
1434 ret = CMD_ERROR;
1435 goto end;
1436 }
1437
1438 ret = mi_lttng_writer_write_element_bool(writer,
1439 mi_lttng_element_command_success, success);
1440 if (ret) {
1441 ret = CMD_ERROR;
1442 goto end;
1443 }
1444
1445 /* Command element close */
1446 ret = mi_lttng_writer_command_close(writer);
1447 if (ret) {
1448 ret = CMD_ERROR;
1449 goto end;
1450 }
1451 }
1452
1453 end:
1454 /* Mi clean-up */
1455 if (writer && mi_lttng_writer_destroy(writer)) {
1456 /* Preserve original error code */
1457 ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
1458 }
1459
1460 if (opt_session_name == NULL) {
1461 free(session_name);
1462 }
1463
1464 /* Overwrite ret if an error occurred in enable_events */
1465 ret = command_ret ? command_ret : ret;
1466
1467 poptFreeContext(pc);
1468 return ret;
1469 }
LTTng tools - Deliverables
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