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Fix: Missing rcu_read_lock in ust_app_get_nb_stream()
[lttng-tools.git] / src / bin / lttng / commands / enable_events.c
CommitLineData
f3ed775e
DG		 1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
d14d33bf
AM		 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.
f3ed775e
DG		 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 *
d14d33bf
AM		 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.
f3ed775e
DG		 16 */
17
18#define _GNU_SOURCE
b2064f54 19#include <assert.h>
f3ed775e
DG		 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>
5a0de755 27#include <inttypes.h>
8f0d098b 28#include <ctype.h>
f3ed775e 29
42224349 30#include <src/common/sessiond-comm/sessiond-comm.h>
f3ed775e 31
89476427
JRJ		 32/* Mi dependancy */
33#include <common/mi-lttng.h>
34
35#include "../command.h"
36
8ab7c0d9
MD		 37#if (LTTNG_SYMBOL_NAME_LEN == 256)
38#define LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "255"
39#endif
40
f3ed775e
DG		 41static char *opt_event_list;
42static int opt_event_type;
0cda4f28
MD		 43static const char *opt_loglevel;
44static int opt_loglevel_type;
6181537c 45static int opt_kernel;
5440dc42 46static char *opt_session_name;
f3ed775e 47static int opt_userspace;
b9dfb167 48static int opt_jul;
5cdb6027 49static int opt_log4j;
f3ed775e 50static int opt_enable_all;
cf0e5467 51static char *opt_probe;
8f0d098b
MD		 52static char *opt_function;
53static char *opt_function_entry_symbol;
f3ed775e 54static char *opt_channel_name;
53a80697 55static char *opt_filter;
fac3366c 56static char *opt_exclude;
d78d6610
DG		 57#if 0
58/* Not implemented yet */
59static char *opt_cmd_name;
60static pid_t opt_pid;
61#endif
f3ed775e
DG		 62
63enum {
64 OPT_HELP = 1,
f3ed775e 65 OPT_TRACEPOINT,
cf0e5467 66 OPT_PROBE,
f3ed775e 67 OPT_FUNCTION,
8f0d098b 68 OPT_FUNCTION_ENTRY,
a54bd42d 69 OPT_SYSCALL,
eeac7d46 70 OPT_USERSPACE,
0cda4f28
MD		 71 OPT_LOGLEVEL,
72 OPT_LOGLEVEL_ONLY,
679b4943 73 OPT_LIST_OPTIONS,
53a80697 74 OPT_FILTER,
fac3366c 75 OPT_EXCLUDE,
f3ed775e
DG		 76};
77
cd80958d 78static struct lttng_handle *handle;
89476427 79static struct mi_writer *writer;
cd80958d 80
f3ed775e
DG		 81static struct poptOption long_options[] = {
82 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
83 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42 84 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
e14f64a8 85 {"all", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
f3ed775e
DG		 86 {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
87 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
d78d6610 88 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
b9dfb167 89 {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
5cdb6027 90 {"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0},
f3ed775e 91 {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
7ebae521 92 {"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
40e9d5d3 93 {"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
b213d387
MD		 94#if 0
95 /*
96 * Currently removed from lttng kernel tracer. Removed from
97 * lttng UI to discourage its use.
98 */
40e9d5d3 99 {"function:entry", 0, POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0},
b213d387 100#endif
7ebae521 101 {"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
0cda4f28
MD		 102 {"loglevel", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL, 0, 0},
103 {"loglevel-only", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL_ONLY, 0, 0},
679b4943 104 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
53a80697 105 {"filter", 'f', POPT_ARG_STRING, &opt_filter, OPT_FILTER, 0, 0},
fac3366c 106 {"exclude", 'x', POPT_ARG_STRING, &opt_exclude, OPT_EXCLUDE, 0, 0},
f3ed775e
DG		 107 {0, 0, 0, 0, 0, 0, 0}
108};
109
110/*
111 * usage
112 */
113static void usage(FILE *ofp)
114{
32a6298d 115 fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [-k|-u] [OPTIONS] \n");
f3ed775e 116 fprintf(ofp, "\n");
32a6298d 117 fprintf(ofp, "Options:\n");
f3ed775e 118 fprintf(ofp, " -h, --help Show this help\n");
679b4943 119 fprintf(ofp, " --list-options Simple listing of options\n");
32a6298d
DG		 120 fprintf(ofp, " -s, --session NAME Apply to session name\n");
121 fprintf(ofp, " -c, --channel NAME Apply to this channel\n");
e08bff8d 122 fprintf(ofp, " -a, --all Enable all tracepoints and syscalls\n");
f3ed775e 123 fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
27221701 124 fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
b9dfb167 125 fprintf(ofp, " -j, --jul Apply for Java application using JUL\n");
5cdb6027 126 fprintf(ofp, " -l, --log4j Apply for Java application using LOG4j\n");
f3ed775e
DG		 127 fprintf(ofp, "\n");
128 fprintf(ofp, "Event options:\n");
129 fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
be49af1e
MD		 130 fprintf(ofp, " - userspace tracer supports wildcards at end of string.\n");
131 fprintf(ofp, " Don't forget to quote to deal with bash expansion.\n");
132 fprintf(ofp, " e.g.:\n");
133 fprintf(ofp, " \"*\"\n");
134 fprintf(ofp, " \"app_component:na*\"\n");
6a240cd9 135 fprintf(ofp, " --probe (addr | symbol | symbol+offset)\n");
cf0e5467
MD		 136 fprintf(ofp, " Dynamic probe.\n");
137 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
138 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
6a240cd9 139 fprintf(ofp, " --function (addr | symbol | symbol+offset)\n");
8f0d098b
MD		 140 fprintf(ofp, " Dynamic function entry/return probe.\n");
141 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
142 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
b213d387 143#if 0
8f0d098b
MD		 144 fprintf(ofp, " --function:entry symbol\n");
145 fprintf(ofp, " Function tracer event\n");
b213d387 146#endif
a54bd42d 147 fprintf(ofp, " --syscall System call event\n");
f3ed775e 148 fprintf(ofp, "\n");
300b8fd5 149 fprintf(ofp, " --loglevel name\n");
f9e8873b 150 fprintf(ofp, " Tracepoint loglevel range from 0 to loglevel.\n");
5cdb6027 151 fprintf(ofp, " For JUL/LOG4j domain, see the table below for the range values.\n");
300b8fd5
MD		 152 fprintf(ofp, " --loglevel-only name\n");
153 fprintf(ofp, " Tracepoint loglevel (only this loglevel)\n");
154 fprintf(ofp, "\n");
0c8477c8
MD		 155 fprintf(ofp, " The loglevel or loglevel-only options should be\n");
156 fprintf(ofp, " combined with a tracepoint name or tracepoint\n");
157 fprintf(ofp, " wildcard.\n");
158 fprintf(ofp, " Available loglevels:\n");
159 fprintf(ofp, " (higher value is more verbose)\n");
46839cc2
MD		 160 fprintf(ofp, " TRACE_EMERG = 0\n");
161 fprintf(ofp, " TRACE_ALERT = 1\n");
162 fprintf(ofp, " TRACE_CRIT = 2\n");
163 fprintf(ofp, " TRACE_ERR = 3\n");
164 fprintf(ofp, " TRACE_WARNING = 4\n");
165 fprintf(ofp, " TRACE_NOTICE = 5\n");
166 fprintf(ofp, " TRACE_INFO = 6\n");
167 fprintf(ofp, " TRACE_DEBUG_SYSTEM = 7\n");
168 fprintf(ofp, " TRACE_DEBUG_PROGRAM = 8\n");
169 fprintf(ofp, " TRACE_DEBUG_PROCESS = 9\n");
170 fprintf(ofp, " TRACE_DEBUG_MODULE = 10\n");
171 fprintf(ofp, " TRACE_DEBUG_UNIT = 11\n");
172 fprintf(ofp, " TRACE_DEBUG_FUNCTION = 12\n");
173 fprintf(ofp, " TRACE_DEBUG_LINE = 13\n");
174 fprintf(ofp, " TRACE_DEBUG = 14\n");
175 fprintf(ofp, " (shortcuts such as \"system\" are allowed)\n");
b2064f54
DG		 176 fprintf(ofp, "\n");
177 fprintf(ofp, " Available JUL domain loglevels:\n");
178 fprintf(ofp, " JUL_OFF = INT32_MAX\n");
179 fprintf(ofp, " JUL_SEVERE = %d\n", LTTNG_LOGLEVEL_JUL_SEVERE);
180 fprintf(ofp, " JUL_WARNING = %d\n", LTTNG_LOGLEVEL_JUL_WARNING);
181 fprintf(ofp, " JUL_INFO = %d\n", LTTNG_LOGLEVEL_JUL_INFO);
182 fprintf(ofp, " JUL_CONFIG = %d\n", LTTNG_LOGLEVEL_JUL_CONFIG);
183 fprintf(ofp, " JUL_FINE = %d\n", LTTNG_LOGLEVEL_JUL_FINE);
184 fprintf(ofp, " JUL_FINER = %d\n", LTTNG_LOGLEVEL_JUL_FINER);
185 fprintf(ofp, " JUL_FINEST = %d\n", LTTNG_LOGLEVEL_JUL_FINEST);
186 fprintf(ofp, " JUL_ALL = INT32_MIN\n");
187 fprintf(ofp, " (shortcuts such as \"severe\" are allowed)\n");
188 fprintf(ofp, "\n");
5cdb6027
DG		 189 fprintf(ofp, " Available LOG4j domain loglevels:\n");
190 fprintf(ofp, " LOG4J_OFF = INT32_MAX\n");
191 fprintf(ofp, " LOG4J_FATAL = %d\n", LTTNG_LOGLEVEL_LOG4J_FATAL);
192 fprintf(ofp, " LOG4J_ERROR = %d\n", LTTNG_LOGLEVEL_LOG4J_ERROR);
193 fprintf(ofp, " LOG4J_WARN = %d\n", LTTNG_LOGLEVEL_LOG4J_WARN);
194 fprintf(ofp, " LOG4J_INFO = %d\n", LTTNG_LOGLEVEL_LOG4J_INFO);
195 fprintf(ofp, " LOG4J_DEBUG = %d\n", LTTNG_LOGLEVEL_LOG4J_DEBUG);
196 fprintf(ofp, " LOG4J_TRACE = %d\n", LTTNG_LOGLEVEL_LOG4J_TRACE);
197 fprintf(ofp, " LOG4J_ALL = INT32_MIN\n");
198 fprintf(ofp, " (shortcuts such as \"severe\" are allowed)\n");
199 fprintf(ofp, "\n");
f2611ab0 200 fprintf(ofp, " -f, --filter \'expression\'\n");
ee8ccafa
MD		 201 fprintf(ofp, " Filter expression on event fields and context.\n");
202 fprintf(ofp, " Event recording depends on evaluation.\n");
919e300c
MD		 203 fprintf(ofp, " Only specify on first activation of\n");
204 fprintf(ofp, " a given event within a session.\n");
205 fprintf(ofp, " Filter only allowed when enabling\n");
206 fprintf(ofp, " events within a session before tracing\n");
9bd578f5
MD		 207 fprintf(ofp, " is started. If the filter fails to link\n");
208 fprintf(ofp, " with the event within the traced domain,\n");
209 fprintf(ofp, " the event will be discarded. Currently,\n");
210 fprintf(ofp, " filter is only implemented for the user-space\n");
211 fprintf(ofp, " tracer.\n");
212 fprintf(ofp, " Expression examples:.\n");
213 fprintf(ofp, " \n");
214 fprintf(ofp, " 'intfield > 500 && intfield < 503'\n");
6a240cd9 215 fprintf(ofp, " '(strfield == \"test\" || intfield != 10) && intfield > 33'\n");
9bd578f5
MD		 216 fprintf(ofp, " 'doublefield > 1.1 && intfield < 5.3'\n");
217 fprintf(ofp, " \n");
218 fprintf(ofp, " Wildcards are allowed at the end of strings:\n");
219 fprintf(ofp, " 'seqfield1 == \"te*\"'\n");
220 fprintf(ofp, " In string literals, the escape character is '\\'.\n");
221 fprintf(ofp, " Use '\\*' for the '*' character, and '\\\\' for\n");
ee8ccafa
MD		 222 fprintf(ofp, " the '\\' character. Wildcard match any sequence of,\n");
223 fprintf(ofp, " characters including an empty sub-string (match 0 or\n");
224 fprintf(ofp, " more characters).\n");
225 fprintf(ofp, "\n");
226 fprintf(ofp, " Context information can be used for filtering. The\n");
227 fprintf(ofp, " examples below show usage of context filtering on\n");
228 fprintf(ofp, " process name (with a wildcard), process ID range, and\n");
229 fprintf(ofp, " unique thread ID for filtering. The process and\n");
230 fprintf(ofp, " thread ID of running applications can be found under\n");
231 fprintf(ofp, " columns \"PID\" and \"LWP\" of the \"ps -eLf\" command.\n");
232 fprintf(ofp, "\n");
233 fprintf(ofp, " '$ctx.procname == \"demo*\"'\n");
234 fprintf(ofp, " '$ctx.vpid >= 4433 && $ctx.vpid < 4455'\n");
235 fprintf(ofp, " '$ctx.vtid == 1234'\n");
c2063d0b
JI		 236 fprintf(ofp, " -x, --exclude LIST\n");
237 fprintf(ofp, " Add exclusions to UST tracepoints:\n");
238 fprintf(ofp, " Events that match any of the items\n");
239 fprintf(ofp, " in the comma-separated LIST are not\n");
240 fprintf(ofp, " enabled, even if they match a wildcard\n");
241 fprintf(ofp, " definition of the event.\n");
300b8fd5 242 fprintf(ofp, "\n");
f3ed775e
DG		 243}
244
0d63dd19 245/*
6181537c 246 * Parse probe options.
0d63dd19 247 */
cf0e5467 248static int parse_probe_opts(struct lttng_event *ev, char *opt)
0d63dd19 249{
49d4e302
JRJ		 250 int ret = CMD_SUCCESS;
251 int match;
8ff0bbd0 252 char s_hex[19];
8ab7c0d9 253#define S_HEX_LEN_SCANF_IS_A_BROKEN_API "18" /* 18 is (19 - 1) (\0 is extra) */
0d63dd19
DG		 254 char name[LTTNG_SYMBOL_NAME_LEN];
255
256 if (opt == NULL) {
49d4e302 257 ret = CMD_ERROR;
8f0d098b 258 goto end;
0d63dd19
DG		 259 }
260
261 /* Check for symbol+offset */
49d4e302 262 match = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API
8ab7c0d9 263 "[^'+']+%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", name, s_hex);
49d4e302 264 if (match == 2) {
7d29a247 265 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0 266 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
cf0e5467 267 DBG("probe symbol %s", ev->attr.probe.symbol_name);
9d035200 268 if (*s_hex == '\0') {
8ff0bbd0 269 ERR("Invalid probe offset %s", s_hex);
49d4e302 270 ret = CMD_ERROR;
8f0d098b 271 goto end;
0d63dd19 272 }
8ff0bbd0 273 ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
cf0e5467 274 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
3000dc78 275 ev->attr.probe.addr = 0;
8f0d098b
MD		 276 goto end;
277 }
278
279 /* Check for symbol */
280 if (isalpha(name[0])) {
49d4e302 281 match = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "s",
8ab7c0d9 282 name);
49d4e302 283 if (match == 1) {
8f0d098b 284 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0 285 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
8f0d098b
MD		 286 DBG("probe symbol %s", ev->attr.probe.symbol_name);
287 ev->attr.probe.offset = 0;
288 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
289 ev->attr.probe.addr = 0;
290 goto end;
291 }
0d63dd19
DG		 292 }
293
294 /* Check for address */
49d4e302
JRJ		 295 match = sscanf(opt, "%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", s_hex);
296 if (match > 0) {
9d035200 297 if (*s_hex == '\0') {
8ff0bbd0 298 ERR("Invalid probe address %s", s_hex);
49d4e302 299 ret = CMD_ERROR;
8f0d098b 300 goto end;
0d63dd19 301 }
8ff0bbd0 302 ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
cf0e5467 303 DBG("probe addr %" PRIu64, ev->attr.probe.addr);
3000dc78
DG		 304 ev->attr.probe.offset = 0;
305 memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
8f0d098b 306 goto end;
0d63dd19
DG		 307 }
308
309 /* No match */
49d4e302 310 ret = CMD_ERROR;
0d63dd19 311
8f0d098b 312end:
0d63dd19
DG		 313 return ret;
314}
315
5cdb6027
DG		 316/*
317 * Maps LOG4j loglevel from string to value
318 */
319static int loglevel_log4j_str_to_value(const char *inputstr)
320{
321 int i = 0;
322 char str[LTTNG_SYMBOL_NAME_LEN];
323
324 /*
325 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
326 * added at the end of the loop so a the upper bound we avoid the overflow.
327 */
328 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
329 str[i] = toupper(inputstr[i]);
330 i++;
331 }
332 str[i] = '\0';
333
334 if (!strcmp(str, "LOG4J_OFF") || !strcmp(str, "OFF")) {
335 return LTTNG_LOGLEVEL_LOG4J_OFF;
336 } else if (!strcmp(str, "LOG4J_FATAL") || !strcmp(str, "FATAL")) {
337 return LTTNG_LOGLEVEL_LOG4J_FATAL;
338 } else if (!strcmp(str, "LOG4J_ERROR") || !strcmp(str, "ERROR")) {
339 return LTTNG_LOGLEVEL_LOG4J_ERROR;
340 } else if (!strcmp(str, "LOG4J_WARN") || !strcmp(str, "WARN")) {
341 return LTTNG_LOGLEVEL_LOG4J_WARN;
342 } else if (!strcmp(str, "LOG4J_INFO") || !strcmp(str, "INFO")) {
343 return LTTNG_LOGLEVEL_LOG4J_INFO;
344 } else if (!strcmp(str, "LOG4J_DEBUG") || !strcmp(str, "DEBUG")) {
345 return LTTNG_LOGLEVEL_LOG4J_DEBUG;
346 } else if (!strcmp(str, "LOG4J_TRACE") || !strcmp(str, "TRACE")) {
347 return LTTNG_LOGLEVEL_LOG4J_TRACE;
348 } else if (!strcmp(str, "LOG4J_ALL") || !strcmp(str, "ALL")) {
349 return LTTNG_LOGLEVEL_LOG4J_ALL;
350 } else {
351 return -1;
352 }
353}
354
b2064f54
DG		 355/*
356 * Maps JUL loglevel from string to value
357 */
358static int loglevel_jul_str_to_value(const char *inputstr)
359{
360 int i = 0;
361 char str[LTTNG_SYMBOL_NAME_LEN];
362
363 /*
364 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
365 * added at the end of the loop so a the upper bound we avoid the overflow.
366 */
367 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
368 str[i] = toupper(inputstr[i]);
369 i++;
370 }
371 str[i] = '\0';
372
373 if (!strcmp(str, "JUL_OFF") || !strcmp(str, "OFF")) {
374 return LTTNG_LOGLEVEL_JUL_OFF;
375 } else if (!strcmp(str, "JUL_SEVERE") || !strcmp(str, "SEVERE")) {
376 return LTTNG_LOGLEVEL_JUL_SEVERE;
377 } else if (!strcmp(str, "JUL_WARNING") || !strcmp(str, "WARNING")) {
378 return LTTNG_LOGLEVEL_JUL_WARNING;
379 } else if (!strcmp(str, "JUL_INFO") || !strcmp(str, "INFO")) {
380 return LTTNG_LOGLEVEL_JUL_INFO;
381 } else if (!strcmp(str, "JUL_CONFIG") || !strcmp(str, "CONFIG")) {
382 return LTTNG_LOGLEVEL_JUL_CONFIG;
383 } else if (!strcmp(str, "JUL_FINE") || !strcmp(str, "FINE")) {
384 return LTTNG_LOGLEVEL_JUL_FINE;
385 } else if (!strcmp(str, "JUL_FINER") || !strcmp(str, "FINER")) {
386 return LTTNG_LOGLEVEL_JUL_FINER;
387 } else if (!strcmp(str, "JUL_FINEST") || !strcmp(str, "FINEST")) {
388 return LTTNG_LOGLEVEL_JUL_FINEST;
389 } else if (!strcmp(str, "JUL_ALL") || !strcmp(str, "ALL")) {
390 return LTTNG_LOGLEVEL_JUL_ALL;
391 } else {
392 return -1;
393 }
394}
395
8005f29a 396/*
0c8477c8 397 * Maps loglevel from string to value
8005f29a
MD		 398 */
399static
46839cc2 400int loglevel_str_to_value(const char *inputstr)
8005f29a 401{
46839cc2
MD		 402 int i = 0;
403 char str[LTTNG_SYMBOL_NAME_LEN];
404
e051e07c
DG		 405 /*
406 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
407 * added at the end of the loop so a the upper bound we avoid the overflow.
408 */
409 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
46839cc2
MD		 410 str[i] = toupper(inputstr[i]);
411 i++;
412 }
413 str[i] = '\0';
414 if (!strcmp(str, "TRACE_EMERG") || !strcmp(str, "EMERG")) {
415 return LTTNG_LOGLEVEL_EMERG;
416 } else if (!strcmp(str, "TRACE_ALERT") || !strcmp(str, "ALERT")) {
417 return LTTNG_LOGLEVEL_ALERT;
418 } else if (!strcmp(str, "TRACE_CRIT") || !strcmp(str, "CRIT")) {
419 return LTTNG_LOGLEVEL_CRIT;
420 } else if (!strcmp(str, "TRACE_ERR") || !strcmp(str, "ERR")) {
421 return LTTNG_LOGLEVEL_ERR;
422 } else if (!strcmp(str, "TRACE_WARNING") || !strcmp(str, "WARNING")) {
423 return LTTNG_LOGLEVEL_WARNING;
424 } else if (!strcmp(str, "TRACE_NOTICE") || !strcmp(str, "NOTICE")) {
425 return LTTNG_LOGLEVEL_NOTICE;
426 } else if (!strcmp(str, "TRACE_INFO") || !strcmp(str, "INFO")) {
427 return LTTNG_LOGLEVEL_INFO;
428 } else if (!strcmp(str, "TRACE_DEBUG_SYSTEM") || !strcmp(str, "DEBUG_SYSTEM") || !strcmp(str, "SYSTEM")) {
429 return LTTNG_LOGLEVEL_DEBUG_SYSTEM;
430 } else if (!strcmp(str, "TRACE_DEBUG_PROGRAM") || !strcmp(str, "DEBUG_PROGRAM") || !strcmp(str, "PROGRAM")) {
431 return LTTNG_LOGLEVEL_DEBUG_PROGRAM;
432 } else if (!strcmp(str, "TRACE_DEBUG_PROCESS") || !strcmp(str, "DEBUG_PROCESS") || !strcmp(str, "PROCESS")) {
433 return LTTNG_LOGLEVEL_DEBUG_PROCESS;
434 } else if (!strcmp(str, "TRACE_DEBUG_MODULE") || !strcmp(str, "DEBUG_MODULE") || !strcmp(str, "MODULE")) {
435 return LTTNG_LOGLEVEL_DEBUG_MODULE;
436 } else if (!strcmp(str, "TRACE_DEBUG_UNIT") || !strcmp(str, "DEBUG_UNIT") || !strcmp(str, "UNIT")) {
437 return LTTNG_LOGLEVEL_DEBUG_UNIT;
438 } else if (!strcmp(str, "TRACE_DEBUG_FUNCTION") || !strcmp(str, "DEBUG_FUNCTION") || !strcmp(str, "FUNCTION")) {
439 return LTTNG_LOGLEVEL_DEBUG_FUNCTION;
440 } else if (!strcmp(str, "TRACE_DEBUG_LINE") || !strcmp(str, "DEBUG_LINE") || !strcmp(str, "LINE")) {
441 return LTTNG_LOGLEVEL_DEBUG_LINE;
442 } else if (!strcmp(str, "TRACE_DEBUG") || !strcmp(str, "DEBUG")) {
443 return LTTNG_LOGLEVEL_DEBUG;
8005f29a
MD		 444 } else {
445 return -1;
446 }
447}
448
85076754
MD		 449static
450const char *print_channel_name(const char *name)
451{
452 return name ? : DEFAULT_CHANNEL_NAME;
453}
454
455static
456const char *print_raw_channel_name(const char *name)
457{
458 return name ? : "<default>";
459}
460
89476427
JRJ		 461/*
462 * Mi print exlcusion list
463 */
464static
465int mi_print_exclusion(int count, char **names)
466{
467 int i, ret;
468
469 assert(writer);
470
471 if (count == 0) {
472 ret = 0;
473 goto end;
474 }
475 ret = mi_lttng_writer_open_element(writer, config_element_exclusions);
476 if (ret) {
477 goto end;
478 }
479
480 for (i = 0; i < count; i++) {
481 ret = mi_lttng_writer_write_element_string(writer,
482 config_element_exclusion, names[i]);
483 if (ret) {
484 goto end;
485 }
486 }
487
488 /* Close exclusions element */
489 ret = mi_lttng_writer_close_element(writer);
490
491end:
492 return ret;
493}
494
9c48cab3
JI		 495/*
496 * Return allocated string for pretty-printing exclusion names.
497 */
498static
499char *print_exclusions(int count, char **names)
500{
501 int length = 0;
502 int i;
503 const char *preamble = " excluding ";
504 char *ret;
505
506 if (count == 0) {
507 return strdup("");
508 }
509
510 /* calculate total required length */
511 for (i = 0; i < count; i++) {
512 length += strlen(names[i]) + 1;
513 }
514
515 /* add length of preamble + one for NUL - one for last (missing) comma */
516 length += strlen(preamble);
517 ret = malloc(length);
518 strncpy(ret, preamble, length);
519 for (i = 0; i < count; i++) {
520 strcat(ret, names[i]);
521 if (i != count - 1) {
522 strcat(ret, ",");
523 }
524 }
89476427 525
9c48cab3
JI		 526 return ret;
527}
528
748bde76
JI		 529/*
530 * Compare list of exclusions against an event name.
531 * Return a list of legal exclusion names.
532 * Produce an error or a warning about others (depending on the situation)
533 */
534static
535int check_exclusion_subsets(const char *event_name,
536 const char *exclusions,
537 int *exclusion_count_ptr,
538 char ***exclusion_list_ptr)
539{
540 const char *excluder_ptr;
541 const char *event_ptr;
542 const char *next_excluder;
543 int excluder_length;
544 int exclusion_count = 0;
545 char **exclusion_list = NULL;
546 int ret = CMD_SUCCESS;
547
548 if (event_name[strlen(event_name) - 1] != '*') {
549 ERR("Event %s: Excluders can only be used with wildcarded events", event_name);
550 goto error;
551 }
552
553 next_excluder = exclusions;
554 while (*next_excluder != 0) {
555 event_ptr = event_name;
556 excluder_ptr = next_excluder;
557 excluder_length = strcspn(next_excluder, ",");
558
559 /* Scan both the excluder and the event letter by letter */
560 while (1) {
561 char e, x;
562
563 e = *event_ptr;
564 x = *excluder_ptr;
565
566 if (x == '*') {
567 /* Event is a subset of the excluder */
568 ERR("Event %s: %.*s excludes all events from %s",
569 event_name,
570 excluder_length,
571 next_excluder,
572 event_name);
573 goto error;
574 }
575 if (e == '*') {
576 /* Excluder is a proper subset of event */
577 exclusion_count++;
578 exclusion_list = realloc(exclusion_list, sizeof(char **) * exclusion_count);
579 exclusion_list[exclusion_count - 1] = strndup(next_excluder, excluder_length);
580
581 break;
582 }
583 if (x != e) {
584 /* Excluder and event sets have no common elements */
585 WARN("Event %s: %.*s does not exclude any events from %s",
586 event_name,
587 excluder_length,
588 next_excluder,
589 event_name);
590 break;
591 }
592 excluder_ptr++;
593 event_ptr++;
594 }
595 /* next excluder */
596 next_excluder += excluder_length;
597 if (*next_excluder == ',') {
598 next_excluder++;
599 }
600 }
601 goto end;
602error:
603 while (exclusion_count--) {
604 free(exclusion_list[exclusion_count]);
605 }
606 if (exclusion_list != NULL) {
607 free(exclusion_list);
608 }
609 exclusion_list = NULL;
610 exclusion_count = 0;
611 ret = CMD_ERROR;
612end:
613 *exclusion_count_ptr = exclusion_count;
614 *exclusion_list_ptr = exclusion_list;
615 return ret;
616}
f3ed775e 617/*
6181537c 618 * Enabling event using the lttng API.
89476427 619 * Note: in case of error only the last error code will be return.
f3ed775e 620 */
cd80958d 621static int enable_events(char *session_name)
f3ed775e 622{
89476427
JRJ		 623 int ret = CMD_SUCCESS, command_ret = CMD_SUCCESS;
624 int error_holder = CMD_SUCCESS, warn = 0, error = 0, success = 1;
b73d0b29 625 char *event_name, *channel_name = NULL;
f3ed775e 626 struct lttng_event ev;
7d29a247 627 struct lttng_domain dom;
7ed70bc9
JI		 628 int exclusion_count = 0;
629 char **exclusion_list = NULL;
f3ed775e 630
441c16a7
MD		 631 memset(&ev, 0, sizeof(ev));
632 memset(&dom, 0, sizeof(dom));
633
53a80697
MD		 634 if (opt_kernel) {
635 if (opt_filter) {
636 ERR("Filter not implement for kernel tracing yet");
637 ret = CMD_ERROR;
638 goto error;
639 }
67b58630
JG		 640 if (opt_loglevel) {
641 WARN("Kernel loglevels are not supported.");
642 }
53a80697
MD		 643 }
644
7d29a247
DG		 645 /* Create lttng domain */
646 if (opt_kernel) {
647 dom.type = LTTNG_DOMAIN_KERNEL;
7972aab2 648 dom.buf_type = LTTNG_BUFFER_GLOBAL;
d78d6610 649 } else if (opt_userspace) {
2bdd86d4 650 dom.type = LTTNG_DOMAIN_UST;
7972aab2 651 /* Default. */
8692d4e5 652 dom.buf_type = LTTNG_BUFFER_PER_UID;
b9dfb167
DG		 653 } else if (opt_jul) {
654 dom.type = LTTNG_DOMAIN_JUL;
655 /* Default. */
656 dom.buf_type = LTTNG_BUFFER_PER_UID;
5cdb6027
DG		 657 } else if (opt_log4j) {
658 dom.type = LTTNG_DOMAIN_LOG4J;
659 /* Default. */
660 dom.buf_type = LTTNG_BUFFER_PER_UID;
6181537c 661 } else {
b9dfb167 662 print_missing_domain();
d16c1a4c 663 ret = CMD_ERROR;
6181537c 664 goto error;
2bdd86d4 665 }
7d29a247 666
d5dd17fd
JI		 667 if (opt_kernel && opt_exclude) {
668 ERR("Event name exclusions are not yet implemented for kernel events");
669 ret = CMD_ERROR;
670 goto error;
671 }
672
85076754 673 channel_name = opt_channel_name;
ae856491 674
cd80958d
DG		 675 handle = lttng_create_handle(session_name, &dom);
676 if (handle == NULL) {
677 ret = -1;
678 goto error;
679 }
1aef21b6 680
89476427
JRJ		 681 /* Prepare Mi */
682 if (lttng_opt_mi) {
683 /* Open a events element */
684 ret = mi_lttng_writer_open_element(writer, config_element_events);
685 if (ret) {
686 ret = CMD_ERROR;
687 goto error;
688 }
689 }
690
cd80958d 691 if (opt_enable_all) {
8c9ae521 692 /* Default setup for enable all */
75e8c5ab
MD		 693 if (opt_kernel) {
694 ev.type = opt_event_type;
695 ev.name[0] = '\0';
300b8fd5
MD		 696 /* kernel loglevels not implemented */
697 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
75e8c5ab
MD		 698 } else {
699 ev.type = LTTNG_EVENT_TRACEPOINT;
700 strcpy(ev.name, "*");
300b8fd5
MD		 701 ev.loglevel_type = opt_loglevel_type;
702 if (opt_loglevel) {
5cdb6027 703 assert(opt_userspace || opt_jul || opt_log4j);
b2064f54
DG		 704 if (opt_userspace) {
705 ev.loglevel = loglevel_str_to_value(opt_loglevel);
706 } else if (opt_jul) {
707 ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
5cdb6027
DG		 708 } else if (opt_log4j) {
709 ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
b2064f54 710 }
300b8fd5
MD		 711 if (ev.loglevel == -1) {
712 ERR("Unknown loglevel %s", opt_loglevel);
2f70b271 713 ret = -LTTNG_ERR_INVALID;
300b8fd5
MD		 714 goto error;
715 }
22e25b71 716 } else {
5cdb6027 717 assert(opt_userspace || opt_jul || opt_log4j);
b2064f54
DG		 718 if (opt_userspace) {
719 ev.loglevel = -1;
5cdb6027 720 } else if (opt_jul || opt_log4j) {
b2064f54
DG		 721 ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
722 }
300b8fd5 723 }
75e8c5ab 724 }
8c9ae521 725
7ed70bc9
JI		 726 if (opt_exclude) {
727 ret = check_exclusion_subsets("*", opt_exclude,
728 &exclusion_count, &exclusion_list);
729 if (ret == CMD_ERROR) {
730 goto error;
731 }
89476427 732 ev.exclusion = 1;
7ed70bc9 733 }
025faf73 734 if (!opt_filter) {
7ed70bc9
JI		 735 ret = lttng_enable_event_with_exclusions(handle,
736 &ev, channel_name,
737 NULL,
738 exclusion_count, exclusion_list);
025faf73
DG		 739 if (ret < 0) {
740 switch (-ret) {
741 case LTTNG_ERR_KERN_EVENT_EXIST:
742 WARN("Kernel events already enabled (channel %s, session %s)",
85076754 743 print_channel_name(channel_name), session_name);
89476427 744 warn = 1;
025faf73 745 break;
9e2a1daf
CB		 746 case LTTNG_ERR_TRACE_ALREADY_STARTED:
747 {
748 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
749 ERR("Events: %s (channel %s, session %s)",
750 msg,
751 print_channel_name(channel_name),
752 session_name);
753 error = 1;
754 break;
755 }
025faf73
DG		 756 default:
757 ERR("Events: %s (channel %s, session %s)",
85076754
MD		 758 lttng_strerror(ret),
759 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
760 ? print_raw_channel_name(channel_name)
761 : print_channel_name(channel_name),
762 session_name);
89476427 763 error = 1;
025faf73
DG		 764 break;
765 }
766 goto end;
42224349 767 }
8c9ae521 768
025faf73
DG		 769 switch (opt_event_type) {
770 case LTTNG_EVENT_TRACEPOINT:
67b58630 771 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
9c48cab3
JI		 772 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
773 MSG("All %s tracepoints%s are enabled in channel %s for loglevel %s",
b9dfb167 774 get_domain_str(dom.type),
9c48cab3 775 exclusion_string,
85076754 776 print_channel_name(channel_name),
025faf73 777 opt_loglevel);
9c48cab3 778 free(exclusion_string);
025faf73 779 } else {
9c48cab3
JI		 780 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
781 MSG("All %s tracepoints%s are enabled in channel %s",
b9dfb167 782 get_domain_str(dom.type),
9c48cab3 783 exclusion_string,
85076754 784 print_channel_name(channel_name));
9c48cab3 785 free(exclusion_string);
025faf73
DG		 786 }
787 break;
788 case LTTNG_EVENT_SYSCALL:
789 if (opt_kernel) {
6e911cad
MD		 790 MSG("All %s system calls are enabled in channel %s",
791 get_domain_str(dom.type),
85076754 792 print_channel_name(channel_name));
025faf73
DG		 793 }
794 break;
795 case LTTNG_EVENT_ALL:
67b58630 796 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
9c48cab3
JI		 797 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
798 MSG("All %s events%s are enabled in channel %s for loglevel %s",
b9dfb167 799 get_domain_str(dom.type),
9c48cab3 800 exclusion_string,
85076754 801 print_channel_name(channel_name),
025faf73 802 opt_loglevel);
9c48cab3 803 free(exclusion_string);
025faf73 804 } else {
9c48cab3
JI		 805 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
806 MSG("All %s events%s are enabled in channel %s",
b9dfb167 807 get_domain_str(dom.type),
9c48cab3 808 exclusion_string,
85076754 809 print_channel_name(channel_name));
9c48cab3 810 free(exclusion_string);
025faf73
DG		 811 }
812 break;
813 default:
814 /*
815 * We should not be here since lttng_enable_event should have
816 * failed on the event type.
817 */
818 goto error;
57064ada 819 }
f3ed775e 820 }
89476427 821
025faf73 822 if (opt_filter) {
89476427 823 command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
7ed70bc9 824 opt_filter, exclusion_count, exclusion_list);
89476427
JRJ		 825 if (command_ret < 0) {
826 switch (-command_ret) {
16363652 827 case LTTNG_ERR_FILTER_EXIST:
85076754 828 WARN("Filter on all events is already enabled"
16363652 829 " (channel %s, session %s)",
85076754 830 print_channel_name(channel_name), session_name);
89476427 831 warn = 1;
16363652 832 break;
9e2a1daf
CB		 833 case LTTNG_ERR_TRACE_ALREADY_STARTED:
834 {
835 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
836 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
837 msg,
838 print_channel_name(channel_name),
839 session_name, opt_filter);
840 error = 1;
841 break;
842 }
16363652 843 default:
85076754 844 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
da3d7d0e
JRJ		 845 lttng_strerror(command_ret),
846 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
85076754
MD		 847 ? print_raw_channel_name(channel_name)
848 : print_channel_name(channel_name),
849 session_name, opt_filter);
89476427 850 error = 1;
16363652
DG		 851 break;
852 }
89476427 853 error_holder = command_ret;
16363652 854 } else {
89476427 855 ev.filter = 1;
16363652
DG		 856 MSG("Filter '%s' successfully set", opt_filter);
857 }
858 }
89476427
JRJ		 859
860 if (lttng_opt_mi) {
861 /* The wildcard * is used for kernel and ust domain to
862 * represent ALL. We copy * in event name to force the wildcard use
863 * for kernel domain
864 *
865 * Note: this is strictly for semantic and printing while in
866 * machine interface mode.
867 */
868 strcpy(ev.name, "*");
869
870 /* If we reach here the events are enabled */
871 if (!error && !warn) {
872 ev.enabled = 1;
873 } else {
874 ev.enabled = 0;
875 success = 0;
876 }
970d848b 877 ret = mi_lttng_event(writer, &ev, 1, handle->domain.type);
89476427
JRJ		 878 if (ret) {
879 ret = CMD_ERROR;
880 goto error;
881 }
882
883 /* print exclusion */
884 ret = mi_print_exclusion(exclusion_count, exclusion_list);
885 if (ret) {
886 ret = CMD_ERROR;
887 goto error;
888 }
889
890 /* Success ? */
891 ret = mi_lttng_writer_write_element_bool(writer,
892 mi_lttng_element_command_success, success);
893 if (ret) {
894 ret = CMD_ERROR;
895 goto error;
896 }
897
898 /* Close event element */
899 ret = mi_lttng_writer_close_element(writer);
900 if (ret) {
901 ret = CMD_ERROR;
902 goto error;
903 }
904 }
905
8c9ae521 906 goto end;
f3ed775e
DG		 907 }
908
909 /* Strip event list */
910 event_name = strtok(opt_event_list, ",");
911 while (event_name != NULL) {
6181537c
DG		 912 /* Copy name and type of the event */
913 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
914 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
915 ev.type = opt_event_type;
916
f3ed775e
DG		 917 /* Kernel tracer action */
918 if (opt_kernel) {
919 DBG("Enabling kernel event %s for channel %s",
85076754
MD		 920 event_name,
921 print_channel_name(channel_name));
f3ed775e
DG		 922
923 switch (opt_event_type) {
7a3d1328
MD		 924 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
925 ev.type = LTTNG_EVENT_TRACEPOINT;
926 /* Fall-through */
e6ddca71 927 case LTTNG_EVENT_TRACEPOINT:
f3ed775e 928 break;
7d29a247 929 case LTTNG_EVENT_PROBE:
cf0e5467 930 ret = parse_probe_opts(&ev, opt_probe);
49d4e302 931 if (ret) {
cf0e5467 932 ERR("Unable to parse probe options");
0d63dd19
DG		 933 ret = 0;
934 goto error;
935 }
f3ed775e
DG		 936 break;
937 case LTTNG_EVENT_FUNCTION:
8f0d098b 938 ret = parse_probe_opts(&ev, opt_function);
49d4e302 939 if (ret) {
8f0d098b
MD		 940 ERR("Unable to parse function probe options");
941 ret = 0;
942 goto error;
943 }
944 break;
945 case LTTNG_EVENT_FUNCTION_ENTRY:
6181537c
DG		 946 strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
947 LTTNG_SYMBOL_NAME_LEN);
99497cd0 948 ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e 949 break;
a54bd42d 950 case LTTNG_EVENT_SYSCALL:
c6aa2d41
MD		 951 ev.type = LTTNG_EVENT_SYSCALL;
952 break;
f3ed775e 953 default:
1ab1ea0b 954 ret = CMD_UNDEFINED;
f3ed775e
DG		 955 goto error;
956 }
0cda4f28 957
0cda4f28 958 /* kernel loglevels not implemented */
8005f29a 959 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
f3ed775e 960 } else if (opt_userspace) { /* User-space tracer action */
d78d6610 961#if 0
e14f64a8
DG		 962 if (opt_cmd_name != NULL || opt_pid) {
963 MSG("Only supporting tracing all UST processes (-u) for now.");
1ab1ea0b 964 ret = CMD_UNDEFINED;
2bdd86d4
MD		 965 goto error;
966 }
d78d6610 967#endif
6181537c 968
300b8fd5 969 DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
85076754 970 print_channel_name(channel_name), opt_loglevel ? : "<all>");
2bdd86d4
MD		 971
972 switch (opt_event_type) {
973 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
2bdd86d4
MD		 974 /* Fall-through */
975 case LTTNG_EVENT_TRACEPOINT:
e4baff1e
MD		 976 /* Copy name and type of the event */
977 ev.type = LTTNG_EVENT_TRACEPOINT;
978 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
979 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
2bdd86d4
MD		 980 break;
981 case LTTNG_EVENT_PROBE:
982 case LTTNG_EVENT_FUNCTION:
983 case LTTNG_EVENT_FUNCTION_ENTRY:
984 case LTTNG_EVENT_SYSCALL:
985 default:
cc62c0c0 986 ERR("Event type not available for user-space tracing");
4ce78777 987 ret = CMD_UNSUPPORTED;
2bdd86d4
MD		 988 goto error;
989 }
0cda4f28 990
7ed70bc9 991 if (opt_exclude) {
89476427 992 ev.exclusion = 1;
d5dd17fd
JI		 993 if (opt_event_type != LTTNG_EVENT_ALL && opt_event_type != LTTNG_EVENT_TRACEPOINT) {
994 ERR("Exclusion option can only be used with tracepoint events");
995 ret = CMD_ERROR;
996 goto error;
997 }
7ed70bc9
JI		 998 /* Free previously allocated items */
999 if (exclusion_list != NULL) {
1000 while (exclusion_count--) {
1001 free(exclusion_list[exclusion_count]);
1002 }
1003 free(exclusion_list);
1004 exclusion_list = NULL;
1005 }
1006 /* Check for proper subsets */
1007 ret = check_exclusion_subsets(event_name, opt_exclude,
1008 &exclusion_count, &exclusion_list);
1009 if (ret == CMD_ERROR) {
1010 goto error;
1011 }
1012 }
1013
0cda4f28 1014 ev.loglevel_type = opt_loglevel_type;
ed7f4083 1015 if (opt_loglevel) {
8005f29a
MD		 1016 ev.loglevel = loglevel_str_to_value(opt_loglevel);
1017 if (ev.loglevel == -1) {
1018 ERR("Unknown loglevel %s", opt_loglevel);
2f70b271 1019 ret = -LTTNG_ERR_INVALID;
8005f29a
MD		 1020 goto error;
1021 }
22e25b71
MD		 1022 } else {
1023 ev.loglevel = -1;
ed7f4083 1024 }
5cdb6027 1025 } else if (opt_jul || opt_log4j) {
b9dfb167
DG		 1026 if (opt_event_type != LTTNG_EVENT_ALL &&
1027 opt_event_type != LTTNG_EVENT_TRACEPOINT) {
5cdb6027 1028 ERR("Event type not supported for domain.");
b9dfb167
DG		 1029 ret = CMD_UNSUPPORTED;
1030 goto error;
1031 }
b2064f54
DG		 1032
1033 ev.loglevel_type = opt_loglevel_type;
1034 if (opt_loglevel) {
5cdb6027
DG		 1035 if (opt_jul) {
1036 ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
1037 } else if (opt_log4j) {
1038 ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
1039 }
b2064f54
DG		 1040 if (ev.loglevel == -1) {
1041 ERR("Unknown loglevel %s", opt_loglevel);
1042 ret = -LTTNG_ERR_INVALID;
1043 goto error;
1044 }
1045 } else {
5cdb6027
DG		 1046 if (opt_jul) {
1047 ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
1048 } else if (opt_log4j) {
1049 ev.loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
1050 }
b2064f54 1051 }
b9dfb167
DG		 1052 ev.type = LTTNG_EVENT_TRACEPOINT;
1053 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
1054 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e 1055 } else {
b9dfb167 1056 print_missing_domain();
300b8fd5 1057 ret = CMD_ERROR;
f3ed775e
DG		 1058 goto error;
1059 }
1060
025faf73 1061 if (!opt_filter) {
9c48cab3
JI		 1062 char *exclusion_string;
1063
89476427 1064 command_ret = lttng_enable_event_with_exclusions(handle,
7ed70bc9
JI		 1065 &ev, channel_name,
1066 NULL, exclusion_count, exclusion_list);
9c48cab3 1067 exclusion_string = print_exclusions(exclusion_count, exclusion_list);
89476427 1068 if (command_ret < 0) {
025faf73 1069 /* Turn ret to positive value to handle the positive error code */
89476427 1070 switch (-command_ret) {
025faf73 1071 case LTTNG_ERR_KERN_EVENT_EXIST:
9c48cab3 1072 WARN("Kernel event %s%s already enabled (channel %s, session %s)",
85076754 1073 event_name,
9c48cab3 1074 exclusion_string,
85076754 1075 print_channel_name(channel_name), session_name);
89476427 1076 warn = 1;
025faf73 1077 break;
9e2a1daf
CB		 1078 case LTTNG_ERR_TRACE_ALREADY_STARTED:
1079 {
1080 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
1081 ERR("Event %s%s: %s (channel %s, session %s)", event_name,
1082 exclusion_string,
1083 msg,
1084 print_channel_name(channel_name),
1085 session_name);
1086 error = 1;
1087 break;
1088 }
025faf73 1089 default:
9c48cab3
JI		 1090 ERR("Event %s%s: %s (channel %s, session %s)", event_name,
1091 exclusion_string,
da3d7d0e
JRJ		 1092 lttng_strerror(command_ret),
1093 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
85076754
MD		 1094 ? print_raw_channel_name(channel_name)
1095 : print_channel_name(channel_name),
1096 session_name);
89476427 1097 error = 1;
025faf73
DG		 1098 break;
1099 }
89476427 1100 error_holder = command_ret;
025faf73 1101 } else {
5cdb6027
DG		 1102 /* So we don't print the default channel name for agent domain. */
1103 if (dom.type == LTTNG_DOMAIN_JUL ||
1104 dom.type == LTTNG_DOMAIN_LOG4J) {
49ceaa70
DG		 1105 MSG("%s event %s%s enabled.",
1106 get_domain_str(dom.type), event_name,
1107 exclusion_string);
1108 } else {
1109 MSG("%s event %s%s created in channel %s",
1110 get_domain_str(dom.type), event_name,
1111 exclusion_string,
1112 print_channel_name(channel_name));
1113 }
42224349 1114 }
9c48cab3 1115 free(exclusion_string);
6181537c 1116 }
025faf73
DG		 1117
1118 if (opt_filter) {
9c48cab3
JI		 1119 char *exclusion_string;
1120
89476427
JRJ		 1121 /* Filter present */
1122 ev.filter = 1;
1123
1124 command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
7ed70bc9 1125 opt_filter, exclusion_count, exclusion_list);
9c48cab3
JI		 1126 exclusion_string = print_exclusions(exclusion_count, exclusion_list);
1127
89476427
JRJ		 1128 if (command_ret < 0) {
1129 switch (-command_ret) {
7671f53c 1130 case LTTNG_ERR_FILTER_EXIST:
9c48cab3 1131 WARN("Filter on event %s%s is already enabled"
7671f53c 1132 " (channel %s, session %s)",
85076754 1133 event_name,
9c48cab3 1134 exclusion_string,
85076754 1135 print_channel_name(channel_name), session_name);
89476427 1136 warn = 1;
7671f53c 1137 break;
9e2a1daf
CB		 1138 case LTTNG_ERR_TRACE_ALREADY_STARTED:
1139 {
1140 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
1141 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
1142 exclusion_string,
1143 msg,
1144 print_channel_name(channel_name),
1145 session_name, opt_filter);
1146 error = 1;
1147 break;
1148 }
7671f53c 1149 default:
9c48cab3
JI		 1150 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
1151 exclusion_string,
da3d7d0e
JRJ		 1152 lttng_strerror(command_ret),
1153 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
85076754
MD		 1154 ? print_raw_channel_name(channel_name)
1155 : print_channel_name(channel_name),
1156 session_name, opt_filter);
89476427 1157 error = 1;
7671f53c
CB		 1158 break;
1159 }
89476427
JRJ		 1160 error_holder = command_ret;
1161
16363652 1162 } else {
9c48cab3
JI		 1163 MSG("Event %s%s: Filter '%s' successfully set",
1164 event_name, exclusion_string,
1165 opt_filter);
53a80697 1166 }
9c48cab3 1167 free(exclusion_string);
53a80697 1168 }
6181537c 1169
89476427
JRJ		 1170 if (lttng_opt_mi) {
1171 if (command_ret) {
1172 success = 0;
1173 ev.enabled = 0;
1174 } else {
1175 ev.enabled = 1;
1176 }
1177
970d848b 1178 ret = mi_lttng_event(writer, &ev, 1, handle->domain.type);
89476427
JRJ		 1179 if (ret) {
1180 ret = CMD_ERROR;
1181 goto error;
1182 }
1183
1184 /* print exclusion */
1185 ret = mi_print_exclusion(exclusion_count, exclusion_list);
1186 if (ret) {
1187 ret = CMD_ERROR;
1188 goto error;
1189 }
1190
1191 /* Success ? */
1192 ret = mi_lttng_writer_write_element_bool(writer,
1193 mi_lttng_element_command_success, success);
1194 if (ret) {
1195 ret = CMD_ERROR;
1196 goto end;
1197 }
1198
1199 /* Close event element */
1200 ret = mi_lttng_writer_close_element(writer);
1201 if (ret) {
1202 ret = CMD_ERROR;
1203 goto end;
1204 }
1205 }
1206
f3ed775e
DG		 1207 /* Next event */
1208 event_name = strtok(NULL, ",");
89476427
JRJ		 1209 /* Reset warn, error and success */
1210 success = 1;
f3ed775e
DG		 1211 }
1212
8c9ae521 1213end:
89476427
JRJ		 1214 /* Close Mi */
1215 if (lttng_opt_mi) {
1216 /* Close events element */
1217 ret = mi_lttng_writer_close_element(writer);
1218 if (ret) {
1219 ret = CMD_ERROR;
1220 goto error;
1221 }
1222 }
f3ed775e 1223error:
ae856491
DG		 1224 if (warn) {
1225 ret = CMD_WARNING;
1226 }
89476427
JRJ		 1227 if (error) {
1228 ret = CMD_ERROR;
1229 }
cd80958d
DG		 1230 lttng_destroy_handle(handle);
1231
7ed70bc9
JI		 1232 if (exclusion_list != NULL) {
1233 while (exclusion_count--) {
1234 free(exclusion_list[exclusion_count]);
1235 }
1236 free(exclusion_list);
1237 }
1238
89476427
JRJ		 1239 /* Overwrite ret with error_holder if there was an actual error with
1240 * enabling an event.
1241 */
1242 ret = error_holder ? error_holder : ret;
1243
f3ed775e
DG		 1244 return ret;
1245}
1246
1247/*
6181537c 1248 * Add event to trace session
f3ed775e
DG		 1249 */
1250int cmd_enable_events(int argc, const char **argv)
1251{
89476427 1252 int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
f3ed775e 1253 static poptContext pc;
cd80958d 1254 char *session_name = NULL;
de044b7a 1255 int event_type = -1;
f3ed775e
DG		 1256
1257 pc = poptGetContext(NULL, argc, argv, long_options, 0);
1258 poptReadDefaultConfig(pc, 0);
1259
1260 /* Default event type */
7a3d1328 1261 opt_event_type = LTTNG_EVENT_ALL;
f3ed775e
DG		 1262
1263 while ((opt = poptGetNextOpt(pc)) != -1) {
1264 switch (opt) {
1265 case OPT_HELP:
ca1c3607 1266 usage(stdout);
f3ed775e 1267 goto end;
f3ed775e 1268 case OPT_TRACEPOINT:
e6ddca71 1269 opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e 1270 break;
cf0e5467 1271 case OPT_PROBE:
7d29a247 1272 opt_event_type = LTTNG_EVENT_PROBE;
f3ed775e
DG		 1273 break;
1274 case OPT_FUNCTION:
1275 opt_event_type = LTTNG_EVENT_FUNCTION;
8f0d098b
MD		 1276 break;
1277 case OPT_FUNCTION_ENTRY:
1278 opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
f3ed775e 1279 break;
a54bd42d
MD		 1280 case OPT_SYSCALL:
1281 opt_event_type = LTTNG_EVENT_SYSCALL;
0133c199 1282 break;
eeac7d46
MD		 1283 case OPT_USERSPACE:
1284 opt_userspace = 1;
eeac7d46 1285 break;
0cda4f28 1286 case OPT_LOGLEVEL:
8005f29a 1287 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
0cda4f28
MD		 1288 opt_loglevel = poptGetOptArg(pc);
1289 break;
1290 case OPT_LOGLEVEL_ONLY:
8005f29a 1291 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
0cda4f28 1292 opt_loglevel = poptGetOptArg(pc);
13dce3b7 1293 break;
679b4943
SM		 1294 case OPT_LIST_OPTIONS:
1295 list_cmd_options(stdout, long_options);
679b4943 1296 goto end;
53a80697
MD		 1297 case OPT_FILTER:
1298 break;
fac3366c
JI		 1299 case OPT_EXCLUDE:
1300 break;
f3ed775e
DG		 1301 default:
1302 usage(stderr);
1303 ret = CMD_UNDEFINED;
1304 goto end;
1305 }
de044b7a
DG		 1306
1307 /* Validate event type. Multiple event type are not supported. */
1308 if (event_type == -1) {
1309 event_type = opt_event_type;
1310 } else {
1311 if (event_type != opt_event_type) {
1312 ERR("Multiple event type not supported.");
1313 ret = CMD_ERROR;
1314 goto end;
1315 }
1316 }
f3ed775e
DG		 1317 }
1318
89476427
JRJ		 1319 /* Mi check */
1320 if (lttng_opt_mi) {
1321 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
1322 if (!writer) {
1323 ret = -LTTNG_ERR_NOMEM;
1324 goto end;
1325 }
1326
1327 /* Open command element */
1328 ret = mi_lttng_writer_command_open(writer,
1329 mi_lttng_element_command_enable_event);
1330 if (ret) {
1331 ret = CMD_ERROR;
1332 goto end;
1333 }
1334
1335 /* Open output element */
1336 ret = mi_lttng_writer_open_element(writer,
1337 mi_lttng_element_command_output);
1338 if (ret) {
1339 ret = CMD_ERROR;
1340 goto end;
1341 }
1342 }
1343
f3ed775e
DG		 1344 opt_event_list = (char*) poptGetArg(pc);
1345 if (opt_event_list == NULL && opt_enable_all == 0) {
1346 ERR("Missing event name(s).\n");
1347 usage(stderr);
ca1c3607 1348 ret = CMD_ERROR;
f3ed775e
DG		 1349 goto end;
1350 }
1351
cd80958d
DG		 1352 if (!opt_session_name) {
1353 session_name = get_session_name();
1354 if (session_name == NULL) {
89476427
JRJ		 1355 command_ret = CMD_ERROR;
1356 success = 0;
1357 goto mi_closing;
cd80958d
DG		 1358 }
1359 } else {
1360 session_name = opt_session_name;
1361 }
1362
89476427
JRJ		 1363 command_ret = enable_events(session_name);
1364 if (command_ret) {
1365 success = 0;
1366 goto mi_closing;
1367 }
1368
1369mi_closing:
1370 /* Mi closing */
1371 if (lttng_opt_mi) {
1372 /* Close output element */
1373 ret = mi_lttng_writer_close_element(writer);
1374 if (ret) {
1375 ret = CMD_ERROR;
1376 goto end;
1377 }
1378
1379 ret = mi_lttng_writer_write_element_bool(writer,
1380 mi_lttng_element_command_success, success);
1381 if (ret) {
1382 ret = CMD_ERROR;
1383 goto end;
1384 }
1385
1386 /* Command element close */
1387 ret = mi_lttng_writer_command_close(writer);
1388 if (ret) {
1389 ret = CMD_ERROR;
1390 goto end;
1391 }
1392 }
f3ed775e
DG		 1393
1394end:
89476427
JRJ		 1395 /* Mi clean-up */
1396 if (writer && mi_lttng_writer_destroy(writer)) {
1397 /* Preserve original error code */
1398 ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
1399 }
1400
cd80958d
DG		 1401 if (opt_session_name == NULL) {
1402 free(session_name);
1403 }
1404
89476427
JRJ		 1405 /* Overwrite ret if an error occurred in enable_events */
1406 ret = command_ret ? command_ret : ret;
1407
ca1c3607 1408 poptFreeContext(pc);
f3ed775e
DG		 1409 return ret;
1410}
LTTng 2.0 tools and control repository
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