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Fix: use zmalloc in lttng enable_events.c
[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 #define _LGPL_SOURCE
20 #include <assert.h>
21 #include <popt.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include <sys/stat.h>
26 #include <sys/types.h>
27 #include <unistd.h>
28 #include <inttypes.h>
29 #include <ctype.h>
30
31 #include <src/common/sessiond-comm/sessiond-comm.h>
32
33 /* Mi dependancy */
34 #include <common/mi-lttng.h>
35
36 #include "../command.h"
37
38 #if (LTTNG_SYMBOL_NAME_LEN == 256)
39 #define LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "255"
40 #endif
41
42 static char *opt_event_list;
43 static int opt_event_type;
44 static const char *opt_loglevel;
45 static int opt_loglevel_type;
46 static int opt_kernel;
47 static char *opt_session_name;
48 static int opt_userspace;
49 static int opt_jul;
50 static int opt_log4j;
51 static int opt_python;
52 static int opt_enable_all;
53 static char *opt_probe;
54 static char *opt_function;
55 static char *opt_function_entry_symbol;
56 static char *opt_channel_name;
57 static char *opt_filter;
58 static char *opt_exclude;
59 #if 0
60 /* Not implemented yet */
61 static char *opt_cmd_name;
62 static pid_t opt_pid;
63 #endif
64
65 enum {
66 OPT_HELP = 1,
67 OPT_TRACEPOINT,
68 OPT_PROBE,
69 OPT_FUNCTION,
70 OPT_FUNCTION_ENTRY,
71 OPT_SYSCALL,
72 OPT_USERSPACE,
73 OPT_LOGLEVEL,
74 OPT_LOGLEVEL_ONLY,
75 OPT_LIST_OPTIONS,
76 OPT_FILTER,
77 OPT_EXCLUDE,
78 };
79
80 static struct lttng_handle *handle;
81 static struct mi_writer *writer;
82
83 static struct poptOption long_options[] = {
84 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
85 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
86 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
87 {"all", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
88 {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
89 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
90 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
91 {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
92 {"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0},
93 {"python", 'p', POPT_ARG_VAL, &opt_python, 1, 0, 0},
94 {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
95 {"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
96 {"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
97 #if 0
98 /*
99 * Currently removed from lttng kernel tracer. Removed from
100 * lttng UI to discourage its use.
101 */
102 {"function:entry", 0, POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0},
103 #endif
104 {"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
105 {"loglevel", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL, 0, 0},
106 {"loglevel-only", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL_ONLY, 0, 0},
107 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
108 {"filter", 'f', POPT_ARG_STRING, &opt_filter, OPT_FILTER, 0, 0},
109 {"exclude", 'x', POPT_ARG_STRING, &opt_exclude, OPT_EXCLUDE, 0, 0},
110 {0, 0, 0, 0, 0, 0, 0}
111 };
112
113 /*
114 * usage
115 */
116 static void usage(FILE *ofp)
117 {
118 fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [-k|-u] [OPTIONS] \n");
119 fprintf(ofp, "\n");
120 fprintf(ofp, "Options:\n");
121 fprintf(ofp, " -h, --help Show this help\n");
122 fprintf(ofp, " --list-options Simple listing of options\n");
123 fprintf(ofp, " -s, --session NAME Apply to session name\n");
124 fprintf(ofp, " -c, --channel NAME Apply to this channel\n");
125 fprintf(ofp, " -a, --all Enable all tracepoints and syscalls\n");
126 fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
127 fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
128 fprintf(ofp, " -j, --jul Apply for Java application using JUL\n");
129 fprintf(ofp, " -l, --log4j Apply for Java application using LOG4j\n");
130 fprintf(ofp, " -p, --python Apply for Java application using LOG4j\n");
131 fprintf(ofp, "\n");
132 fprintf(ofp, "Event options:\n");
133 fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
134 fprintf(ofp, " - userspace tracer supports wildcards at end of string.\n");
135 fprintf(ofp, " Don't forget to quote to deal with bash expansion.\n");
136 fprintf(ofp, " e.g.:\n");
137 fprintf(ofp, " \"*\"\n");
138 fprintf(ofp, " \"app_component:na*\"\n");
139 fprintf(ofp, " --probe (addr | symbol | symbol+offset)\n");
140 fprintf(ofp, " Dynamic probe.\n");
141 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
142 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
143 fprintf(ofp, " --function (addr | symbol | symbol+offset)\n");
144 fprintf(ofp, " Dynamic function entry/return probe.\n");
145 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
146 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
147 #if 0
148 fprintf(ofp, " --function:entry symbol\n");
149 fprintf(ofp, " Function tracer event\n");
150 #endif
151 fprintf(ofp, " --syscall System call event\n");
152 fprintf(ofp, "\n");
153 fprintf(ofp, " --loglevel name\n");
154 fprintf(ofp, " Tracepoint loglevel range from 0 to loglevel.\n");
155 fprintf(ofp, " For JUL/LOG4j domain, see the table below for the range values.\n");
156 fprintf(ofp, " --loglevel-only name\n");
157 fprintf(ofp, " Tracepoint loglevel (only this loglevel)\n");
158 fprintf(ofp, "\n");
159 fprintf(ofp, " The loglevel or loglevel-only options should be\n");
160 fprintf(ofp, " combined with a tracepoint name or tracepoint\n");
161 fprintf(ofp, " wildcard.\n");
162 fprintf(ofp, " Available loglevels:\n");
163 fprintf(ofp, " (higher value is more verbose)\n");
164 fprintf(ofp, " TRACE_EMERG = 0\n");
165 fprintf(ofp, " TRACE_ALERT = 1\n");
166 fprintf(ofp, " TRACE_CRIT = 2\n");
167 fprintf(ofp, " TRACE_ERR = 3\n");
168 fprintf(ofp, " TRACE_WARNING = 4\n");
169 fprintf(ofp, " TRACE_NOTICE = 5\n");
170 fprintf(ofp, " TRACE_INFO = 6\n");
171 fprintf(ofp, " TRACE_DEBUG_SYSTEM = 7\n");
172 fprintf(ofp, " TRACE_DEBUG_PROGRAM = 8\n");
173 fprintf(ofp, " TRACE_DEBUG_PROCESS = 9\n");
174 fprintf(ofp, " TRACE_DEBUG_MODULE = 10\n");
175 fprintf(ofp, " TRACE_DEBUG_UNIT = 11\n");
176 fprintf(ofp, " TRACE_DEBUG_FUNCTION = 12\n");
177 fprintf(ofp, " TRACE_DEBUG_LINE = 13\n");
178 fprintf(ofp, " TRACE_DEBUG = 14\n");
179 fprintf(ofp, " (shortcuts such as \"system\" are allowed)\n");
180 fprintf(ofp, "\n");
181 fprintf(ofp, " Available JUL domain loglevels:\n");
182 fprintf(ofp, " JUL_OFF = INT32_MAX\n");
183 fprintf(ofp, " JUL_SEVERE = %d\n", LTTNG_LOGLEVEL_JUL_SEVERE);
184 fprintf(ofp, " JUL_WARNING = %d\n", LTTNG_LOGLEVEL_JUL_WARNING);
185 fprintf(ofp, " JUL_INFO = %d\n", LTTNG_LOGLEVEL_JUL_INFO);
186 fprintf(ofp, " JUL_CONFIG = %d\n", LTTNG_LOGLEVEL_JUL_CONFIG);
187 fprintf(ofp, " JUL_FINE = %d\n", LTTNG_LOGLEVEL_JUL_FINE);
188 fprintf(ofp, " JUL_FINER = %d\n", LTTNG_LOGLEVEL_JUL_FINER);
189 fprintf(ofp, " JUL_FINEST = %d\n", LTTNG_LOGLEVEL_JUL_FINEST);
190 fprintf(ofp, " JUL_ALL = INT32_MIN\n");
191 fprintf(ofp, " (shortcuts such as \"severe\" are allowed)\n");
192 fprintf(ofp, "\n");
193 fprintf(ofp, " Available LOG4j domain loglevels:\n");
194 fprintf(ofp, " LOG4J_OFF = INT32_MAX\n");
195 fprintf(ofp, " LOG4J_FATAL = %d\n", LTTNG_LOGLEVEL_LOG4J_FATAL);
196 fprintf(ofp, " LOG4J_ERROR = %d\n", LTTNG_LOGLEVEL_LOG4J_ERROR);
197 fprintf(ofp, " LOG4J_WARN = %d\n", LTTNG_LOGLEVEL_LOG4J_WARN);
198 fprintf(ofp, " LOG4J_INFO = %d\n", LTTNG_LOGLEVEL_LOG4J_INFO);
199 fprintf(ofp, " LOG4J_DEBUG = %d\n", LTTNG_LOGLEVEL_LOG4J_DEBUG);
200 fprintf(ofp, " LOG4J_TRACE = %d\n", LTTNG_LOGLEVEL_LOG4J_TRACE);
201 fprintf(ofp, " LOG4J_ALL = INT32_MIN\n");
202 fprintf(ofp, " (shortcuts such as \"severe\" are allowed)\n");
203 fprintf(ofp, "\n");
204 fprintf(ofp, " Available Python domain loglevels:\n");
205 fprintf(ofp, " PYTHON_CRITICAL = %d\n", LTTNG_LOGLEVEL_PYTHON_CRITICAL);
206 fprintf(ofp, " PYTHON_ERROR = %d\n", LTTNG_LOGLEVEL_PYTHON_ERROR);
207 fprintf(ofp, " PYTHON_WARNING = %d\n", LTTNG_LOGLEVEL_PYTHON_WARNING);
208 fprintf(ofp, " PYTHON_INFO = %d\n", LTTNG_LOGLEVEL_PYTHON_INFO);
209 fprintf(ofp, " PYTHON_DEBUG = %d\n", LTTNG_LOGLEVEL_PYTHON_DEBUG);
210 fprintf(ofp, " PYTHON_NOTSET = %d\n", LTTNG_LOGLEVEL_PYTHON_NOTSET);
211 fprintf(ofp, " (shortcuts such as \"critical\" are allowed)\n");
212 fprintf(ofp, "\n");
213 fprintf(ofp, " -f, --filter \'expression\'\n");
214 fprintf(ofp, " Filter expression on event fields and context.\n");
215 fprintf(ofp, " Event recording depends on evaluation.\n");
216 fprintf(ofp, " Only specify on first activation of\n");
217 fprintf(ofp, " a given event within a session.\n");
218 fprintf(ofp, " Filter only allowed when enabling\n");
219 fprintf(ofp, " events within a session before tracing\n");
220 fprintf(ofp, " is started. If the filter fails to link\n");
221 fprintf(ofp, " with the event within the traced domain,\n");
222 fprintf(ofp, " the event will be discarded. Currently,\n");
223 fprintf(ofp, " filter is only implemented for the user-space\n");
224 fprintf(ofp, " tracer.\n");
225 fprintf(ofp, " Expression examples:.\n");
226 fprintf(ofp, " \n");
227 fprintf(ofp, " 'intfield > 500 && intfield < 503'\n");
228 fprintf(ofp, " '(strfield == \"test\" || intfield != 10) && intfield > 33'\n");
229 fprintf(ofp, " 'doublefield > 1.1 && intfield < 5.3'\n");
230 fprintf(ofp, " \n");
231 fprintf(ofp, " Wildcards are allowed at the end of strings:\n");
232 fprintf(ofp, " 'seqfield1 == \"te*\"'\n");
233 fprintf(ofp, " In string literals, the escape character is '\\'.\n");
234 fprintf(ofp, " Use '\\*' for the '*' character, and '\\\\' for\n");
235 fprintf(ofp, " the '\\' character. Wildcard match any sequence of,\n");
236 fprintf(ofp, " characters including an empty sub-string (match 0 or\n");
237 fprintf(ofp, " more characters).\n");
238 fprintf(ofp, "\n");
239 fprintf(ofp, " Context information can be used for filtering. The\n");
240 fprintf(ofp, " examples below show usage of context filtering on\n");
241 fprintf(ofp, " process name (with a wildcard), process ID range, and\n");
242 fprintf(ofp, " unique thread ID for filtering. The process and\n");
243 fprintf(ofp, " thread ID of running applications can be found under\n");
244 fprintf(ofp, " columns \"PID\" and \"LWP\" of the \"ps -eLf\" command.\n");
245 fprintf(ofp, "\n");
246 fprintf(ofp, " '$ctx.procname == \"demo*\"'\n");
247 fprintf(ofp, " '$ctx.vpid >= 4433 && $ctx.vpid < 4455'\n");
248 fprintf(ofp, " '$ctx.vtid == 1234'\n");
249 fprintf(ofp, " -x, --exclude LIST\n");
250 fprintf(ofp, " Add exclusions to UST tracepoints:\n");
251 fprintf(ofp, " Events that match any of the items\n");
252 fprintf(ofp, " in the comma-separated LIST are not\n");
253 fprintf(ofp, " enabled, even if they match a wildcard\n");
254 fprintf(ofp, " definition of the event.\n");
255 fprintf(ofp, "\n");
256 }
257
258 /*
259 * Parse probe options.
260 */
261 static int parse_probe_opts(struct lttng_event *ev, char *opt)
262 {
263 int ret = CMD_SUCCESS;
264 int match;
265 char s_hex[19];
266 #define S_HEX_LEN_SCANF_IS_A_BROKEN_API "18" /* 18 is (19 - 1) (\0 is extra) */
267 char name[LTTNG_SYMBOL_NAME_LEN];
268
269 if (opt == NULL) {
270 ret = CMD_ERROR;
271 goto end;
272 }
273
274 /* Check for symbol+offset */
275 match = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API
276 "[^'+']+%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", name, s_hex);
277 if (match == 2) {
278 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
279 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
280 DBG("probe symbol %s", ev->attr.probe.symbol_name);
281 if (*s_hex == '\0') {
282 ERR("Invalid probe offset %s", s_hex);
283 ret = CMD_ERROR;
284 goto end;
285 }
286 ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
287 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
288 ev->attr.probe.addr = 0;
289 goto end;
290 }
291
292 /* Check for symbol */
293 if (isalpha(name[0])) {
294 match = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "s",
295 name);
296 if (match == 1) {
297 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
298 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
299 DBG("probe symbol %s", ev->attr.probe.symbol_name);
300 ev->attr.probe.offset = 0;
301 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
302 ev->attr.probe.addr = 0;
303 goto end;
304 }
305 }
306
307 /* Check for address */
308 match = sscanf(opt, "%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", s_hex);
309 if (match > 0) {
310 if (*s_hex == '\0') {
311 ERR("Invalid probe address %s", s_hex);
312 ret = CMD_ERROR;
313 goto end;
314 }
315 ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
316 DBG("probe addr %" PRIu64, ev->attr.probe.addr);
317 ev->attr.probe.offset = 0;
318 memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
319 goto end;
320 }
321
322 /* No match */
323 ret = CMD_ERROR;
324
325 end:
326 return ret;
327 }
328
329 /*
330 * Maps LOG4j loglevel from string to value
331 */
332 static int loglevel_log4j_str_to_value(const char *inputstr)
333 {
334 int i = 0;
335 char str[LTTNG_SYMBOL_NAME_LEN];
336
337 /*
338 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
339 * added at the end of the loop so a the upper bound we avoid the overflow.
340 */
341 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
342 str[i] = toupper(inputstr[i]);
343 i++;
344 }
345 str[i] = '\0';
346
347 if (!strcmp(str, "LOG4J_OFF") || !strcmp(str, "OFF")) {
348 return LTTNG_LOGLEVEL_LOG4J_OFF;
349 } else if (!strcmp(str, "LOG4J_FATAL") || !strcmp(str, "FATAL")) {
350 return LTTNG_LOGLEVEL_LOG4J_FATAL;
351 } else if (!strcmp(str, "LOG4J_ERROR") || !strcmp(str, "ERROR")) {
352 return LTTNG_LOGLEVEL_LOG4J_ERROR;
353 } else if (!strcmp(str, "LOG4J_WARN") || !strcmp(str, "WARN")) {
354 return LTTNG_LOGLEVEL_LOG4J_WARN;
355 } else if (!strcmp(str, "LOG4J_INFO") || !strcmp(str, "INFO")) {
356 return LTTNG_LOGLEVEL_LOG4J_INFO;
357 } else if (!strcmp(str, "LOG4J_DEBUG") || !strcmp(str, "DEBUG")) {
358 return LTTNG_LOGLEVEL_LOG4J_DEBUG;
359 } else if (!strcmp(str, "LOG4J_TRACE") || !strcmp(str, "TRACE")) {
360 return LTTNG_LOGLEVEL_LOG4J_TRACE;
361 } else if (!strcmp(str, "LOG4J_ALL") || !strcmp(str, "ALL")) {
362 return LTTNG_LOGLEVEL_LOG4J_ALL;
363 } else {
364 return -1;
365 }
366 }
367
368 /*
369 * Maps JUL loglevel from string to value
370 */
371 static int loglevel_jul_str_to_value(const char *inputstr)
372 {
373 int i = 0;
374 char str[LTTNG_SYMBOL_NAME_LEN];
375
376 /*
377 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
378 * added at the end of the loop so a the upper bound we avoid the overflow.
379 */
380 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
381 str[i] = toupper(inputstr[i]);
382 i++;
383 }
384 str[i] = '\0';
385
386 if (!strcmp(str, "JUL_OFF") || !strcmp(str, "OFF")) {
387 return LTTNG_LOGLEVEL_JUL_OFF;
388 } else if (!strcmp(str, "JUL_SEVERE") || !strcmp(str, "SEVERE")) {
389 return LTTNG_LOGLEVEL_JUL_SEVERE;
390 } else if (!strcmp(str, "JUL_WARNING") || !strcmp(str, "WARNING")) {
391 return LTTNG_LOGLEVEL_JUL_WARNING;
392 } else if (!strcmp(str, "JUL_INFO") || !strcmp(str, "INFO")) {
393 return LTTNG_LOGLEVEL_JUL_INFO;
394 } else if (!strcmp(str, "JUL_CONFIG") || !strcmp(str, "CONFIG")) {
395 return LTTNG_LOGLEVEL_JUL_CONFIG;
396 } else if (!strcmp(str, "JUL_FINE") || !strcmp(str, "FINE")) {
397 return LTTNG_LOGLEVEL_JUL_FINE;
398 } else if (!strcmp(str, "JUL_FINER") || !strcmp(str, "FINER")) {
399 return LTTNG_LOGLEVEL_JUL_FINER;
400 } else if (!strcmp(str, "JUL_FINEST") || !strcmp(str, "FINEST")) {
401 return LTTNG_LOGLEVEL_JUL_FINEST;
402 } else if (!strcmp(str, "JUL_ALL") || !strcmp(str, "ALL")) {
403 return LTTNG_LOGLEVEL_JUL_ALL;
404 } else {
405 return -1;
406 }
407 }
408
409 /*
410 * Maps Python loglevel from string to value
411 */
412 static int loglevel_python_str_to_value(const char *inputstr)
413 {
414 int i = 0;
415 char str[LTTNG_SYMBOL_NAME_LEN];
416
417 /*
418 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
419 * added at the end of the loop so a the upper bound we avoid the overflow.
420 */
421 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
422 str[i] = toupper(inputstr[i]);
423 i++;
424 }
425 str[i] = '\0';
426
427 if (!strcmp(str, "PYTHON_CRITICAL") || !strcmp(str, "CRITICAL")) {
428 return LTTNG_LOGLEVEL_PYTHON_CRITICAL;
429 } else if (!strcmp(str, "PYTHON_ERROR") || !strcmp(str, "ERROR")) {
430 return LTTNG_LOGLEVEL_PYTHON_ERROR;
431 } else if (!strcmp(str, "PYTHON_WARNING") || !strcmp(str, "WARNING")) {
432 return LTTNG_LOGLEVEL_PYTHON_WARNING;
433 } else if (!strcmp(str, "PYTHON_INFO") || !strcmp(str, "INFO")) {
434 return LTTNG_LOGLEVEL_PYTHON_INFO;
435 } else if (!strcmp(str, "PYTNON_DEBUG") || !strcmp(str, "DEBUG")) {
436 return LTTNG_LOGLEVEL_PYTHON_DEBUG;
437 } else if (!strcmp(str, "PYTHON_NOTSET") || !strcmp(str, "NOTSET")) {
438 return LTTNG_LOGLEVEL_PYTHON_NOTSET;
439 } else {
440 return -1;
441 }
442 }
443
444 /*
445 * Maps loglevel from string to value
446 */
447 static
448 int loglevel_str_to_value(const char *inputstr)
449 {
450 int i = 0;
451 char str[LTTNG_SYMBOL_NAME_LEN];
452
453 /*
454 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
455 * added at the end of the loop so a the upper bound we avoid the overflow.
456 */
457 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
458 str[i] = toupper(inputstr[i]);
459 i++;
460 }
461 str[i] = '\0';
462 if (!strcmp(str, "TRACE_EMERG") || !strcmp(str, "EMERG")) {
463 return LTTNG_LOGLEVEL_EMERG;
464 } else if (!strcmp(str, "TRACE_ALERT") || !strcmp(str, "ALERT")) {
465 return LTTNG_LOGLEVEL_ALERT;
466 } else if (!strcmp(str, "TRACE_CRIT") || !strcmp(str, "CRIT")) {
467 return LTTNG_LOGLEVEL_CRIT;
468 } else if (!strcmp(str, "TRACE_ERR") || !strcmp(str, "ERR")) {
469 return LTTNG_LOGLEVEL_ERR;
470 } else if (!strcmp(str, "TRACE_WARNING") || !strcmp(str, "WARNING")) {
471 return LTTNG_LOGLEVEL_WARNING;
472 } else if (!strcmp(str, "TRACE_NOTICE") || !strcmp(str, "NOTICE")) {
473 return LTTNG_LOGLEVEL_NOTICE;
474 } else if (!strcmp(str, "TRACE_INFO") || !strcmp(str, "INFO")) {
475 return LTTNG_LOGLEVEL_INFO;
476 } else if (!strcmp(str, "TRACE_DEBUG_SYSTEM") || !strcmp(str, "DEBUG_SYSTEM") || !strcmp(str, "SYSTEM")) {
477 return LTTNG_LOGLEVEL_DEBUG_SYSTEM;
478 } else if (!strcmp(str, "TRACE_DEBUG_PROGRAM") || !strcmp(str, "DEBUG_PROGRAM") || !strcmp(str, "PROGRAM")) {
479 return LTTNG_LOGLEVEL_DEBUG_PROGRAM;
480 } else if (!strcmp(str, "TRACE_DEBUG_PROCESS") || !strcmp(str, "DEBUG_PROCESS") || !strcmp(str, "PROCESS")) {
481 return LTTNG_LOGLEVEL_DEBUG_PROCESS;
482 } else if (!strcmp(str, "TRACE_DEBUG_MODULE") || !strcmp(str, "DEBUG_MODULE") || !strcmp(str, "MODULE")) {
483 return LTTNG_LOGLEVEL_DEBUG_MODULE;
484 } else if (!strcmp(str, "TRACE_DEBUG_UNIT") || !strcmp(str, "DEBUG_UNIT") || !strcmp(str, "UNIT")) {
485 return LTTNG_LOGLEVEL_DEBUG_UNIT;
486 } else if (!strcmp(str, "TRACE_DEBUG_FUNCTION") || !strcmp(str, "DEBUG_FUNCTION") || !strcmp(str, "FUNCTION")) {
487 return LTTNG_LOGLEVEL_DEBUG_FUNCTION;
488 } else if (!strcmp(str, "TRACE_DEBUG_LINE") || !strcmp(str, "DEBUG_LINE") || !strcmp(str, "LINE")) {
489 return LTTNG_LOGLEVEL_DEBUG_LINE;
490 } else if (!strcmp(str, "TRACE_DEBUG") || !strcmp(str, "DEBUG")) {
491 return LTTNG_LOGLEVEL_DEBUG;
492 } else {
493 return -1;
494 }
495 }
496
497 static
498 const char *print_channel_name(const char *name)
499 {
500 return name ? : DEFAULT_CHANNEL_NAME;
501 }
502
503 static
504 const char *print_raw_channel_name(const char *name)
505 {
506 return name ? : "<default>";
507 }
508
509 /*
510 * Mi print exlcusion list
511 */
512 static
513 int mi_print_exclusion(int count, char **names)
514 {
515 int i, ret;
516
517 assert(writer);
518
519 if (count == 0) {
520 ret = 0;
521 goto end;
522 }
523 ret = mi_lttng_writer_open_element(writer, config_element_exclusions);
524 if (ret) {
525 goto end;
526 }
527
528 for (i = 0; i < count; i++) {
529 ret = mi_lttng_writer_write_element_string(writer,
530 config_element_exclusion, names[i]);
531 if (ret) {
532 goto end;
533 }
534 }
535
536 /* Close exclusions element */
537 ret = mi_lttng_writer_close_element(writer);
538
539 end:
540 return ret;
541 }
542
543 /*
544 * Return allocated string for pretty-printing exclusion names.
545 */
546 static
547 char *print_exclusions(int count, char **names)
548 {
549 int length = 0;
550 int i;
551 const char *preamble = " excluding ";
552 char *ret;
553
554 if (count == 0) {
555 return strdup("");
556 }
557
558 /* calculate total required length */
559 for (i = 0; i < count; i++) {
560 length += strlen(names[i]) + 1;
561 }
562
563 /* add length of preamble + one for NUL - one for last (missing) comma */
564 length += strlen(preamble);
565 ret = zmalloc(length);
566 if (!ret) {
567 return NULL;
568 }
569 strncpy(ret, preamble, length);
570 for (i = 0; i < count; i++) {
571 strcat(ret, names[i]);
572 if (i != count - 1) {
573 strcat(ret, ",");
574 }
575 }
576
577 return ret;
578 }
579
580 /*
581 * Compare list of exclusions against an event name.
582 * Return a list of legal exclusion names.
583 * Produce an error or a warning about others (depending on the situation)
584 */
585 static
586 int check_exclusion_subsets(const char *event_name,
587 const char *exclusions,
588 int *exclusion_count_ptr,
589 char ***exclusion_list_ptr)
590 {
591 const char *excluder_ptr;
592 const char *event_ptr;
593 const char *next_excluder;
594 int excluder_length;
595 int exclusion_count = 0;
596 char **exclusion_list = NULL;
597 int ret = CMD_SUCCESS;
598
599 if (event_name[strlen(event_name) - 1] != '*') {
600 ERR("Event %s: Excluders can only be used with wildcarded events", event_name);
601 goto error;
602 }
603
604 next_excluder = exclusions;
605 while (*next_excluder != 0) {
606 event_ptr = event_name;
607 excluder_ptr = next_excluder;
608 excluder_length = strcspn(next_excluder, ",");
609
610 /* Scan both the excluder and the event letter by letter */
611 while (1) {
612 char e, x;
613
614 e = *event_ptr;
615 x = *excluder_ptr;
616
617 if (x == '*') {
618 /* Event is a subset of the excluder */
619 ERR("Event %s: %.*s excludes all events from %s",
620 event_name,
621 excluder_length,
622 next_excluder,
623 event_name);
624 goto error;
625 }
626 if (e == '*') {
627 /* Excluder is a proper subset of event */
628 exclusion_count++;
629 exclusion_list = realloc(exclusion_list, sizeof(char **) * exclusion_count);
630 exclusion_list[exclusion_count - 1] = strndup(next_excluder, excluder_length);
631
632 break;
633 }
634 if (x != e) {
635 /* Excluder and event sets have no common elements */
636 WARN("Event %s: %.*s does not exclude any events from %s",
637 event_name,
638 excluder_length,
639 next_excluder,
640 event_name);
641 break;
642 }
643 excluder_ptr++;
644 event_ptr++;
645 }
646 /* next excluder */
647 next_excluder += excluder_length;
648 if (*next_excluder == ',') {
649 next_excluder++;
650 }
651 }
652 goto end;
653 error:
654 while (exclusion_count--) {
655 free(exclusion_list[exclusion_count]);
656 }
657 if (exclusion_list != NULL) {
658 free(exclusion_list);
659 }
660 exclusion_list = NULL;
661 exclusion_count = 0;
662 ret = CMD_ERROR;
663 end:
664 *exclusion_count_ptr = exclusion_count;
665 *exclusion_list_ptr = exclusion_list;
666 return ret;
667 }
668 /*
669 * Enabling event using the lttng API.
670 * Note: in case of error only the last error code will be return.
671 */
672 static int enable_events(char *session_name)
673 {
674 int ret = CMD_SUCCESS, command_ret = CMD_SUCCESS;
675 int error_holder = CMD_SUCCESS, warn = 0, error = 0, success = 1;
676 char *event_name, *channel_name = NULL;
677 struct lttng_event ev;
678 struct lttng_domain dom;
679 int exclusion_count = 0;
680 char **exclusion_list = NULL;
681
682 memset(&ev, 0, sizeof(ev));
683 memset(&dom, 0, sizeof(dom));
684
685 if (opt_kernel) {
686 if (opt_filter) {
687 ERR("Filter not implement for kernel tracing yet");
688 ret = CMD_ERROR;
689 goto error;
690 }
691 if (opt_loglevel) {
692 WARN("Kernel loglevels are not supported.");
693 }
694 }
695
696 /* Create lttng domain */
697 if (opt_kernel) {
698 dom.type = LTTNG_DOMAIN_KERNEL;
699 dom.buf_type = LTTNG_BUFFER_GLOBAL;
700 } else if (opt_userspace) {
701 dom.type = LTTNG_DOMAIN_UST;
702 /* Default. */
703 dom.buf_type = LTTNG_BUFFER_PER_UID;
704 } else if (opt_jul) {
705 dom.type = LTTNG_DOMAIN_JUL;
706 /* Default. */
707 dom.buf_type = LTTNG_BUFFER_PER_UID;
708 } else if (opt_log4j) {
709 dom.type = LTTNG_DOMAIN_LOG4J;
710 /* Default. */
711 dom.buf_type = LTTNG_BUFFER_PER_UID;
712 } else if (opt_python) {
713 dom.type = LTTNG_DOMAIN_PYTHON;
714 /* Default. */
715 dom.buf_type = LTTNG_BUFFER_PER_UID;
716 } else {
717 print_missing_domain();
718 ret = CMD_ERROR;
719 goto error;
720 }
721
722 if (opt_kernel && opt_exclude) {
723 ERR("Event name exclusions are not yet implemented for kernel events");
724 ret = CMD_ERROR;
725 goto error;
726 }
727
728 channel_name = opt_channel_name;
729
730 handle = lttng_create_handle(session_name, &dom);
731 if (handle == NULL) {
732 ret = -1;
733 goto error;
734 }
735
736 /* Prepare Mi */
737 if (lttng_opt_mi) {
738 /* Open a events element */
739 ret = mi_lttng_writer_open_element(writer, config_element_events);
740 if (ret) {
741 ret = CMD_ERROR;
742 goto error;
743 }
744 }
745
746 if (opt_enable_all) {
747 /* Default setup for enable all */
748 if (opt_kernel) {
749 ev.type = opt_event_type;
750 ev.name[0] = '\0';
751 /* kernel loglevels not implemented */
752 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
753 } else {
754 ev.type = LTTNG_EVENT_TRACEPOINT;
755 strcpy(ev.name, "*");
756 ev.loglevel_type = opt_loglevel_type;
757 if (opt_loglevel) {
758 assert(opt_userspace || opt_jul || opt_log4j || opt_python);
759 if (opt_userspace) {
760 ev.loglevel = loglevel_str_to_value(opt_loglevel);
761 } else if (opt_jul) {
762 ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
763 } else if (opt_log4j) {
764 ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
765 } else if (opt_python) {
766 ev.loglevel = loglevel_python_str_to_value(opt_loglevel);
767 }
768 if (ev.loglevel == -1) {
769 ERR("Unknown loglevel %s", opt_loglevel);
770 ret = -LTTNG_ERR_INVALID;
771 goto error;
772 }
773 } else {
774 assert(opt_userspace || opt_jul || opt_log4j || opt_python);
775 if (opt_userspace) {
776 ev.loglevel = -1;
777 } else if (opt_jul || opt_log4j) {
778 ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
779 } else if (opt_python) {
780 ev.loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG;
781 }
782 }
783 }
784
785 if (opt_exclude) {
786 ret = check_exclusion_subsets("*", opt_exclude,
787 &exclusion_count, &exclusion_list);
788 if (ret == CMD_ERROR) {
789 goto error;
790 }
791 ev.exclusion = 1;
792 }
793 if (!opt_filter) {
794 ret = lttng_enable_event_with_exclusions(handle,
795 &ev, channel_name,
796 NULL,
797 exclusion_count, exclusion_list);
798 if (ret < 0) {
799 switch (-ret) {
800 case LTTNG_ERR_KERN_EVENT_EXIST:
801 WARN("Kernel events already enabled (channel %s, session %s)",
802 print_channel_name(channel_name), session_name);
803 warn = 1;
804 break;
805 case LTTNG_ERR_TRACE_ALREADY_STARTED:
806 {
807 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
808 ERR("Events: %s (channel %s, session %s)",
809 msg,
810 print_channel_name(channel_name),
811 session_name);
812 error = 1;
813 break;
814 }
815 default:
816 ERR("Events: %s (channel %s, session %s)",
817 lttng_strerror(ret),
818 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
819 ? print_raw_channel_name(channel_name)
820 : print_channel_name(channel_name),
821 session_name);
822 error = 1;
823 break;
824 }
825 goto end;
826 }
827
828 switch (opt_event_type) {
829 case LTTNG_EVENT_TRACEPOINT:
830 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
831 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
832 MSG("All %s tracepoints%s are enabled in channel %s for loglevel %s",
833 get_domain_str(dom.type),
834 exclusion_string,
835 print_channel_name(channel_name),
836 opt_loglevel);
837 free(exclusion_string);
838 } else {
839 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
840 MSG("All %s tracepoints%s are enabled in channel %s",
841 get_domain_str(dom.type),
842 exclusion_string,
843 print_channel_name(channel_name));
844 free(exclusion_string);
845 }
846 break;
847 case LTTNG_EVENT_SYSCALL:
848 if (opt_kernel) {
849 MSG("All %s system calls are enabled in channel %s",
850 get_domain_str(dom.type),
851 print_channel_name(channel_name));
852 }
853 break;
854 case LTTNG_EVENT_ALL:
855 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
856 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
857 MSG("All %s events%s are enabled in channel %s for loglevel %s",
858 get_domain_str(dom.type),
859 exclusion_string,
860 print_channel_name(channel_name),
861 opt_loglevel);
862 free(exclusion_string);
863 } else {
864 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
865 MSG("All %s events%s are enabled in channel %s",
866 get_domain_str(dom.type),
867 exclusion_string,
868 print_channel_name(channel_name));
869 free(exclusion_string);
870 }
871 break;
872 default:
873 /*
874 * We should not be here since lttng_enable_event should have
875 * failed on the event type.
876 */
877 goto error;
878 }
879 }
880
881 if (opt_filter) {
882 command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
883 opt_filter, exclusion_count, exclusion_list);
884 if (command_ret < 0) {
885 switch (-command_ret) {
886 case LTTNG_ERR_FILTER_EXIST:
887 WARN("Filter on all events is already enabled"
888 " (channel %s, session %s)",
889 print_channel_name(channel_name), session_name);
890 warn = 1;
891 break;
892 case LTTNG_ERR_TRACE_ALREADY_STARTED:
893 {
894 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
895 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
896 msg,
897 print_channel_name(channel_name),
898 session_name, opt_filter);
899 error = 1;
900 break;
901 }
902 default:
903 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
904 lttng_strerror(command_ret),
905 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
906 ? print_raw_channel_name(channel_name)
907 : print_channel_name(channel_name),
908 session_name, opt_filter);
909 error = 1;
910 break;
911 }
912 error_holder = command_ret;
913 } else {
914 ev.filter = 1;
915 MSG("Filter '%s' successfully set", opt_filter);
916 }
917 }
918
919 if (lttng_opt_mi) {
920 /* The wildcard * is used for kernel and ust domain to
921 * represent ALL. We copy * in event name to force the wildcard use
922 * for kernel domain
923 *
924 * Note: this is strictly for semantic and printing while in
925 * machine interface mode.
926 */
927 strcpy(ev.name, "*");
928
929 /* If we reach here the events are enabled */
930 if (!error && !warn) {
931 ev.enabled = 1;
932 } else {
933 ev.enabled = 0;
934 success = 0;
935 }
936 ret = mi_lttng_event(writer, &ev, 1, handle->domain.type);
937 if (ret) {
938 ret = CMD_ERROR;
939 goto error;
940 }
941
942 /* print exclusion */
943 ret = mi_print_exclusion(exclusion_count, exclusion_list);
944 if (ret) {
945 ret = CMD_ERROR;
946 goto error;
947 }
948
949 /* Success ? */
950 ret = mi_lttng_writer_write_element_bool(writer,
951 mi_lttng_element_command_success, success);
952 if (ret) {
953 ret = CMD_ERROR;
954 goto error;
955 }
956
957 /* Close event element */
958 ret = mi_lttng_writer_close_element(writer);
959 if (ret) {
960 ret = CMD_ERROR;
961 goto error;
962 }
963 }
964
965 goto end;
966 }
967
968 /* Strip event list */
969 event_name = strtok(opt_event_list, ",");
970 while (event_name != NULL) {
971 /* Copy name and type of the event */
972 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
973 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
974 ev.type = opt_event_type;
975
976 /* Kernel tracer action */
977 if (opt_kernel) {
978 DBG("Enabling kernel event %s for channel %s",
979 event_name,
980 print_channel_name(channel_name));
981
982 switch (opt_event_type) {
983 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
984 ev.type = LTTNG_EVENT_TRACEPOINT;
985 /* Fall-through */
986 case LTTNG_EVENT_TRACEPOINT:
987 break;
988 case LTTNG_EVENT_PROBE:
989 ret = parse_probe_opts(&ev, opt_probe);
990 if (ret) {
991 ERR("Unable to parse probe options");
992 ret = 0;
993 goto error;
994 }
995 break;
996 case LTTNG_EVENT_FUNCTION:
997 ret = parse_probe_opts(&ev, opt_function);
998 if (ret) {
999 ERR("Unable to parse function probe options");
1000 ret = 0;
1001 goto error;
1002 }
1003 break;
1004 case LTTNG_EVENT_FUNCTION_ENTRY:
1005 strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
1006 LTTNG_SYMBOL_NAME_LEN);
1007 ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
1008 break;
1009 case LTTNG_EVENT_SYSCALL:
1010 ev.type = LTTNG_EVENT_SYSCALL;
1011 break;
1012 default:
1013 ret = CMD_UNDEFINED;
1014 goto error;
1015 }
1016
1017 /* kernel loglevels not implemented */
1018 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
1019 } else if (opt_userspace) { /* User-space tracer action */
1020 #if 0
1021 if (opt_cmd_name != NULL || opt_pid) {
1022 MSG("Only supporting tracing all UST processes (-u) for now.");
1023 ret = CMD_UNDEFINED;
1024 goto error;
1025 }
1026 #endif
1027
1028 DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
1029 print_channel_name(channel_name), opt_loglevel ? : "<all>");
1030
1031 switch (opt_event_type) {
1032 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
1033 /* Fall-through */
1034 case LTTNG_EVENT_TRACEPOINT:
1035 /* Copy name and type of the event */
1036 ev.type = LTTNG_EVENT_TRACEPOINT;
1037 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
1038 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
1039 break;
1040 case LTTNG_EVENT_PROBE:
1041 case LTTNG_EVENT_FUNCTION:
1042 case LTTNG_EVENT_FUNCTION_ENTRY:
1043 case LTTNG_EVENT_SYSCALL:
1044 default:
1045 ERR("Event type not available for user-space tracing");
1046 ret = CMD_UNSUPPORTED;
1047 goto error;
1048 }
1049
1050 if (opt_exclude) {
1051 ev.exclusion = 1;
1052 if (opt_event_type != LTTNG_EVENT_ALL && opt_event_type != LTTNG_EVENT_TRACEPOINT) {
1053 ERR("Exclusion option can only be used with tracepoint events");
1054 ret = CMD_ERROR;
1055 goto error;
1056 }
1057 /* Free previously allocated items */
1058 if (exclusion_list != NULL) {
1059 while (exclusion_count--) {
1060 free(exclusion_list[exclusion_count]);
1061 }
1062 free(exclusion_list);
1063 exclusion_list = NULL;
1064 }
1065 /* Check for proper subsets */
1066 ret = check_exclusion_subsets(event_name, opt_exclude,
1067 &exclusion_count, &exclusion_list);
1068 if (ret == CMD_ERROR) {
1069 goto error;
1070 }
1071 }
1072
1073 ev.loglevel_type = opt_loglevel_type;
1074 if (opt_loglevel) {
1075 ev.loglevel = loglevel_str_to_value(opt_loglevel);
1076 if (ev.loglevel == -1) {
1077 ERR("Unknown loglevel %s", opt_loglevel);
1078 ret = -LTTNG_ERR_INVALID;
1079 goto error;
1080 }
1081 } else {
1082 ev.loglevel = -1;
1083 }
1084 } else if (opt_jul || opt_log4j || opt_python) {
1085 if (opt_event_type != LTTNG_EVENT_ALL &&
1086 opt_event_type != LTTNG_EVENT_TRACEPOINT) {
1087 ERR("Event type not supported for domain.");
1088 ret = CMD_UNSUPPORTED;
1089 goto error;
1090 }
1091
1092 ev.loglevel_type = opt_loglevel_type;
1093 if (opt_loglevel) {
1094 if (opt_jul) {
1095 ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
1096 } else if (opt_log4j) {
1097 ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
1098 } else if (opt_python) {
1099 ev.loglevel = loglevel_python_str_to_value(opt_loglevel);
1100 }
1101 if (ev.loglevel == -1) {
1102 ERR("Unknown loglevel %s", opt_loglevel);
1103 ret = -LTTNG_ERR_INVALID;
1104 goto error;
1105 }
1106 } else {
1107 if (opt_jul) {
1108 ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
1109 } else if (opt_log4j) {
1110 ev.loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
1111 } else if (opt_python) {
1112 ev.loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG;
1113 }
1114 }
1115 ev.type = LTTNG_EVENT_TRACEPOINT;
1116 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
1117 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
1118 } else {
1119 print_missing_domain();
1120 ret = CMD_ERROR;
1121 goto error;
1122 }
1123
1124 if (!opt_filter) {
1125 char *exclusion_string;
1126
1127 command_ret = lttng_enable_event_with_exclusions(handle,
1128 &ev, channel_name,
1129 NULL, exclusion_count, exclusion_list);
1130 exclusion_string = print_exclusions(exclusion_count, exclusion_list);
1131 if (command_ret < 0) {
1132 /* Turn ret to positive value to handle the positive error code */
1133 switch (-command_ret) {
1134 case LTTNG_ERR_KERN_EVENT_EXIST:
1135 WARN("Kernel event %s%s already enabled (channel %s, session %s)",
1136 event_name,
1137 exclusion_string,
1138 print_channel_name(channel_name), session_name);
1139 warn = 1;
1140 break;
1141 case LTTNG_ERR_TRACE_ALREADY_STARTED:
1142 {
1143 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
1144 ERR("Event %s%s: %s (channel %s, session %s)", event_name,
1145 exclusion_string,
1146 msg,
1147 print_channel_name(channel_name),
1148 session_name);
1149 error = 1;
1150 break;
1151 }
1152 default:
1153 ERR("Event %s%s: %s (channel %s, session %s)", event_name,
1154 exclusion_string,
1155 lttng_strerror(command_ret),
1156 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
1157 ? print_raw_channel_name(channel_name)
1158 : print_channel_name(channel_name),
1159 session_name);
1160 error = 1;
1161 break;
1162 }
1163 error_holder = command_ret;
1164 } else {
1165 /* So we don't print the default channel name for agent domain. */
1166 if (dom.type == LTTNG_DOMAIN_JUL ||
1167 dom.type == LTTNG_DOMAIN_LOG4J) {
1168 MSG("%s event %s%s enabled.",
1169 get_domain_str(dom.type), event_name,
1170 exclusion_string);
1171 } else {
1172 MSG("%s event %s%s created in channel %s",
1173 get_domain_str(dom.type), event_name,
1174 exclusion_string,
1175 print_channel_name(channel_name));
1176 }
1177 }
1178 free(exclusion_string);
1179 }
1180
1181 if (opt_filter) {
1182 char *exclusion_string;
1183
1184 /* Filter present */
1185 ev.filter = 1;
1186
1187 command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
1188 opt_filter, exclusion_count, exclusion_list);
1189 exclusion_string = print_exclusions(exclusion_count, exclusion_list);
1190
1191 if (command_ret < 0) {
1192 switch (-command_ret) {
1193 case LTTNG_ERR_FILTER_EXIST:
1194 WARN("Filter on event %s%s is already enabled"
1195 " (channel %s, session %s)",
1196 event_name,
1197 exclusion_string,
1198 print_channel_name(channel_name), session_name);
1199 warn = 1;
1200 break;
1201 case LTTNG_ERR_TRACE_ALREADY_STARTED:
1202 {
1203 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
1204 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
1205 exclusion_string,
1206 msg,
1207 print_channel_name(channel_name),
1208 session_name, opt_filter);
1209 error = 1;
1210 break;
1211 }
1212 default:
1213 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
1214 exclusion_string,
1215 lttng_strerror(command_ret),
1216 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
1217 ? print_raw_channel_name(channel_name)
1218 : print_channel_name(channel_name),
1219 session_name, opt_filter);
1220 error = 1;
1221 break;
1222 }
1223 error_holder = command_ret;
1224
1225 } else {
1226 MSG("Event %s%s: Filter '%s' successfully set",
1227 event_name, exclusion_string,
1228 opt_filter);
1229 }
1230 free(exclusion_string);
1231 }
1232
1233 if (lttng_opt_mi) {
1234 if (command_ret) {
1235 success = 0;
1236 ev.enabled = 0;
1237 } else {
1238 ev.enabled = 1;
1239 }
1240
1241 ret = mi_lttng_event(writer, &ev, 1, handle->domain.type);
1242 if (ret) {
1243 ret = CMD_ERROR;
1244 goto error;
1245 }
1246
1247 /* print exclusion */
1248 ret = mi_print_exclusion(exclusion_count, exclusion_list);
1249 if (ret) {
1250 ret = CMD_ERROR;
1251 goto error;
1252 }
1253
1254 /* Success ? */
1255 ret = mi_lttng_writer_write_element_bool(writer,
1256 mi_lttng_element_command_success, success);
1257 if (ret) {
1258 ret = CMD_ERROR;
1259 goto end;
1260 }
1261
1262 /* Close event element */
1263 ret = mi_lttng_writer_close_element(writer);
1264 if (ret) {
1265 ret = CMD_ERROR;
1266 goto end;
1267 }
1268 }
1269
1270 /* Next event */
1271 event_name = strtok(NULL, ",");
1272 /* Reset warn, error and success */
1273 success = 1;
1274 }
1275
1276 end:
1277 /* Close Mi */
1278 if (lttng_opt_mi) {
1279 /* Close events element */
1280 ret = mi_lttng_writer_close_element(writer);
1281 if (ret) {
1282 ret = CMD_ERROR;
1283 goto error;
1284 }
1285 }
1286 error:
1287 if (warn) {
1288 ret = CMD_WARNING;
1289 }
1290 if (error) {
1291 ret = CMD_ERROR;
1292 }
1293 lttng_destroy_handle(handle);
1294
1295 if (exclusion_list != NULL) {
1296 while (exclusion_count--) {
1297 free(exclusion_list[exclusion_count]);
1298 }
1299 free(exclusion_list);
1300 }
1301
1302 /* Overwrite ret with error_holder if there was an actual error with
1303 * enabling an event.
1304 */
1305 ret = error_holder ? error_holder : ret;
1306
1307 return ret;
1308 }
1309
1310 /*
1311 * Add event to trace session
1312 */
1313 int cmd_enable_events(int argc, const char **argv)
1314 {
1315 int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
1316 static poptContext pc;
1317 char *session_name = NULL;
1318 int event_type = -1;
1319
1320 pc = poptGetContext(NULL, argc, argv, long_options, 0);
1321 poptReadDefaultConfig(pc, 0);
1322
1323 /* Default event type */
1324 opt_event_type = LTTNG_EVENT_ALL;
1325
1326 while ((opt = poptGetNextOpt(pc)) != -1) {
1327 switch (opt) {
1328 case OPT_HELP:
1329 usage(stdout);
1330 goto end;
1331 case OPT_TRACEPOINT:
1332 opt_event_type = LTTNG_EVENT_TRACEPOINT;
1333 break;
1334 case OPT_PROBE:
1335 opt_event_type = LTTNG_EVENT_PROBE;
1336 break;
1337 case OPT_FUNCTION:
1338 opt_event_type = LTTNG_EVENT_FUNCTION;
1339 break;
1340 case OPT_FUNCTION_ENTRY:
1341 opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
1342 break;
1343 case OPT_SYSCALL:
1344 opt_event_type = LTTNG_EVENT_SYSCALL;
1345 break;
1346 case OPT_USERSPACE:
1347 opt_userspace = 1;
1348 break;
1349 case OPT_LOGLEVEL:
1350 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
1351 opt_loglevel = poptGetOptArg(pc);
1352 break;
1353 case OPT_LOGLEVEL_ONLY:
1354 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
1355 opt_loglevel = poptGetOptArg(pc);
1356 break;
1357 case OPT_LIST_OPTIONS:
1358 list_cmd_options(stdout, long_options);
1359 goto end;
1360 case OPT_FILTER:
1361 break;
1362 case OPT_EXCLUDE:
1363 break;
1364 default:
1365 usage(stderr);
1366 ret = CMD_UNDEFINED;
1367 goto end;
1368 }
1369
1370 /* Validate event type. Multiple event type are not supported. */
1371 if (event_type == -1) {
1372 event_type = opt_event_type;
1373 } else {
1374 if (event_type != opt_event_type) {
1375 ERR("Multiple event type not supported.");
1376 ret = CMD_ERROR;
1377 goto end;
1378 }
1379 }
1380 }
1381
1382 /* Mi check */
1383 if (lttng_opt_mi) {
1384 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
1385 if (!writer) {
1386 ret = -LTTNG_ERR_NOMEM;
1387 goto end;
1388 }
1389
1390 /* Open command element */
1391 ret = mi_lttng_writer_command_open(writer,
1392 mi_lttng_element_command_enable_event);
1393 if (ret) {
1394 ret = CMD_ERROR;
1395 goto end;
1396 }
1397
1398 /* Open output element */
1399 ret = mi_lttng_writer_open_element(writer,
1400 mi_lttng_element_command_output);
1401 if (ret) {
1402 ret = CMD_ERROR;
1403 goto end;
1404 }
1405 }
1406
1407 opt_event_list = (char*) poptGetArg(pc);
1408 if (opt_event_list == NULL && opt_enable_all == 0) {
1409 ERR("Missing event name(s).\n");
1410 usage(stderr);
1411 ret = CMD_ERROR;
1412 goto end;
1413 }
1414
1415 if (!opt_session_name) {
1416 session_name = get_session_name();
1417 if (session_name == NULL) {
1418 command_ret = CMD_ERROR;
1419 success = 0;
1420 goto mi_closing;
1421 }
1422 } else {
1423 session_name = opt_session_name;
1424 }
1425
1426 command_ret = enable_events(session_name);
1427 if (command_ret) {
1428 success = 0;
1429 goto mi_closing;
1430 }
1431
1432 mi_closing:
1433 /* Mi closing */
1434 if (lttng_opt_mi) {
1435 /* Close output element */
1436 ret = mi_lttng_writer_close_element(writer);
1437 if (ret) {
1438 ret = CMD_ERROR;
1439 goto end;
1440 }
1441
1442 ret = mi_lttng_writer_write_element_bool(writer,
1443 mi_lttng_element_command_success, success);
1444 if (ret) {
1445 ret = CMD_ERROR;
1446 goto end;
1447 }
1448
1449 /* Command element close */
1450 ret = mi_lttng_writer_command_close(writer);
1451 if (ret) {
1452 ret = CMD_ERROR;
1453 goto end;
1454 }
1455 }
1456
1457 end:
1458 /* Mi clean-up */
1459 if (writer && mi_lttng_writer_destroy(writer)) {
1460 /* Preserve original error code */
1461 ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
1462 }
1463
1464 if (opt_session_name == NULL) {
1465 free(session_name);
1466 }
1467
1468 /* Overwrite ret if an error occurred in enable_events */
1469 ret = command_ret ? command_ret : ret;
1470
1471 poptFreeContext(pc);
1472 return ret;
1473 }
LTTng tools - Deliverables
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