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Fix: fail gracefully on --exclude on unsupported domains
[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{
d21b5f18 115 fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] (-k | -u | -j | -l | -p) [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);
b9b693fc
MD		 517 ret = zmalloc(length);
518 if (!ret) {
519 return NULL;
520 }
9c48cab3
JI		 521 strncpy(ret, preamble, length);
522 for (i = 0; i < count; i++) {
523 strcat(ret, names[i]);
524 if (i != count - 1) {
525 strcat(ret, ",");
526 }
527 }
89476427 528
9c48cab3
JI		 529 return ret;
530}
531
748bde76
JI		 532/*
533 * Compare list of exclusions against an event name.
534 * Return a list of legal exclusion names.
535 * Produce an error or a warning about others (depending on the situation)
536 */
537static
538int check_exclusion_subsets(const char *event_name,
539 const char *exclusions,
540 int *exclusion_count_ptr,
541 char ***exclusion_list_ptr)
542{
543 const char *excluder_ptr;
544 const char *event_ptr;
545 const char *next_excluder;
546 int excluder_length;
547 int exclusion_count = 0;
548 char **exclusion_list = NULL;
549 int ret = CMD_SUCCESS;
550
551 if (event_name[strlen(event_name) - 1] != '*') {
552 ERR("Event %s: Excluders can only be used with wildcarded events", event_name);
553 goto error;
554 }
555
556 next_excluder = exclusions;
557 while (*next_excluder != 0) {
558 event_ptr = event_name;
559 excluder_ptr = next_excluder;
560 excluder_length = strcspn(next_excluder, ",");
561
562 /* Scan both the excluder and the event letter by letter */
563 while (1) {
564 char e, x;
565
566 e = *event_ptr;
567 x = *excluder_ptr;
568
569 if (x == '*') {
570 /* Event is a subset of the excluder */
571 ERR("Event %s: %.*s excludes all events from %s",
572 event_name,
573 excluder_length,
574 next_excluder,
575 event_name);
576 goto error;
577 }
578 if (e == '*') {
466b49a2
MD		 579 char *string;
580 char **new_exclusion_list;
581
748bde76 582 /* Excluder is a proper subset of event */
466b49a2
MD		 583 string = strndup(next_excluder, excluder_length);
584 if (!string) {
585 PERROR("strndup error");
586 goto error;
587 }
588 new_exclusion_list = realloc(exclusion_list,
f7c909f7 589 sizeof(char *) * (exclusion_count + 1));
466b49a2
MD		 590 if (!new_exclusion_list) {
591 PERROR("realloc");
592 free(string);
593 goto error;
594 }
595 exclusion_list = new_exclusion_list;
748bde76 596 exclusion_count++;
466b49a2 597 exclusion_list[exclusion_count - 1] = string;
748bde76
JI		 598 break;
599 }
600 if (x != e) {
601 /* Excluder and event sets have no common elements */
602 WARN("Event %s: %.*s does not exclude any events from %s",
603 event_name,
604 excluder_length,
605 next_excluder,
606 event_name);
607 break;
608 }
609 excluder_ptr++;
610 event_ptr++;
611 }
612 /* next excluder */
613 next_excluder += excluder_length;
614 if (*next_excluder == ',') {
615 next_excluder++;
616 }
617 }
618 goto end;
619error:
620 while (exclusion_count--) {
621 free(exclusion_list[exclusion_count]);
622 }
623 if (exclusion_list != NULL) {
624 free(exclusion_list);
625 }
626 exclusion_list = NULL;
627 exclusion_count = 0;
628 ret = CMD_ERROR;
629end:
630 *exclusion_count_ptr = exclusion_count;
631 *exclusion_list_ptr = exclusion_list;
632 return ret;
633}
f3ed775e 634/*
6181537c 635 * Enabling event using the lttng API.
89476427 636 * Note: in case of error only the last error code will be return.
f3ed775e 637 */
cd80958d 638static int enable_events(char *session_name)
f3ed775e 639{
89476427
JRJ		 640 int ret = CMD_SUCCESS, command_ret = CMD_SUCCESS;
641 int error_holder = CMD_SUCCESS, warn = 0, error = 0, success = 1;
b73d0b29 642 char *event_name, *channel_name = NULL;
f3ed775e 643 struct lttng_event ev;
7d29a247 644 struct lttng_domain dom;
7ed70bc9
JI		 645 int exclusion_count = 0;
646 char **exclusion_list = NULL;
f3ed775e 647
441c16a7
MD		 648 memset(&ev, 0, sizeof(ev));
649 memset(&dom, 0, sizeof(dom));
650
53a80697
MD		 651 if (opt_kernel) {
652 if (opt_filter) {
653 ERR("Filter not implement for kernel tracing yet");
654 ret = CMD_ERROR;
655 goto error;
656 }
67b58630
JG		 657 if (opt_loglevel) {
658 WARN("Kernel loglevels are not supported.");
659 }
53a80697
MD		 660 }
661
7d29a247
DG		 662 /* Create lttng domain */
663 if (opt_kernel) {
664 dom.type = LTTNG_DOMAIN_KERNEL;
7972aab2 665 dom.buf_type = LTTNG_BUFFER_GLOBAL;
d78d6610 666 } else if (opt_userspace) {
2bdd86d4 667 dom.type = LTTNG_DOMAIN_UST;
7972aab2 668 /* Default. */
8692d4e5 669 dom.buf_type = LTTNG_BUFFER_PER_UID;
b9dfb167
DG		 670 } else if (opt_jul) {
671 dom.type = LTTNG_DOMAIN_JUL;
672 /* Default. */
673 dom.buf_type = LTTNG_BUFFER_PER_UID;
5cdb6027
DG		 674 } else if (opt_log4j) {
675 dom.type = LTTNG_DOMAIN_LOG4J;
676 /* Default. */
677 dom.buf_type = LTTNG_BUFFER_PER_UID;
6181537c 678 } else {
b9dfb167 679 print_missing_domain();
d16c1a4c 680 ret = CMD_ERROR;
6181537c 681 goto error;
2bdd86d4 682 }
7d29a247 683
b4845851
AB		 684 if (opt_exclude) {
685 switch (dom.type) {
686 case LTTNG_DOMAIN_KERNEL:
687 case LTTNG_DOMAIN_JUL:
688 case LTTNG_DOMAIN_LOG4J:
689 ERR("Event name exclusions are not yet implemented for %s events",
690 get_domain_str(dom.type));
691 ret = CMD_ERROR;
692 goto error;
693 case LTTNG_DOMAIN_UST:
694 /* Exclusions supported */
695 break;
696 default:
697 assert(0);
698 }
d5dd17fd
JI		 699 }
700
85076754 701 channel_name = opt_channel_name;
ae856491 702
cd80958d
DG		 703 handle = lttng_create_handle(session_name, &dom);
704 if (handle == NULL) {
705 ret = -1;
706 goto error;
707 }
1aef21b6 708
89476427
JRJ		 709 /* Prepare Mi */
710 if (lttng_opt_mi) {
711 /* Open a events element */
712 ret = mi_lttng_writer_open_element(writer, config_element_events);
713 if (ret) {
714 ret = CMD_ERROR;
715 goto error;
716 }
717 }
718
cd80958d 719 if (opt_enable_all) {
8c9ae521 720 /* Default setup for enable all */
75e8c5ab
MD		 721 if (opt_kernel) {
722 ev.type = opt_event_type;
723 ev.name[0] = '\0';
300b8fd5
MD		 724 /* kernel loglevels not implemented */
725 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
75e8c5ab
MD		 726 } else {
727 ev.type = LTTNG_EVENT_TRACEPOINT;
728 strcpy(ev.name, "*");
300b8fd5
MD		 729 ev.loglevel_type = opt_loglevel_type;
730 if (opt_loglevel) {
5cdb6027 731 assert(opt_userspace || opt_jul || opt_log4j);
b2064f54
DG		 732 if (opt_userspace) {
733 ev.loglevel = loglevel_str_to_value(opt_loglevel);
734 } else if (opt_jul) {
735 ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
5cdb6027
DG		 736 } else if (opt_log4j) {
737 ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
b2064f54 738 }
300b8fd5
MD		 739 if (ev.loglevel == -1) {
740 ERR("Unknown loglevel %s", opt_loglevel);
2f70b271 741 ret = -LTTNG_ERR_INVALID;
300b8fd5
MD		 742 goto error;
743 }
22e25b71 744 } else {
5cdb6027 745 assert(opt_userspace || opt_jul || opt_log4j);
b2064f54
DG		 746 if (opt_userspace) {
747 ev.loglevel = -1;
5cdb6027 748 } else if (opt_jul || opt_log4j) {
b2064f54
DG		 749 ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
750 }
300b8fd5 751 }
75e8c5ab 752 }
8c9ae521 753
7ed70bc9
JI		 754 if (opt_exclude) {
755 ret = check_exclusion_subsets("*", opt_exclude,
756 &exclusion_count, &exclusion_list);
757 if (ret == CMD_ERROR) {
758 goto error;
759 }
89476427 760 ev.exclusion = 1;
7ed70bc9 761 }
025faf73 762 if (!opt_filter) {
7ed70bc9
JI		 763 ret = lttng_enable_event_with_exclusions(handle,
764 &ev, channel_name,
765 NULL,
766 exclusion_count, exclusion_list);
025faf73
DG		 767 if (ret < 0) {
768 switch (-ret) {
769 case LTTNG_ERR_KERN_EVENT_EXIST:
770 WARN("Kernel events already enabled (channel %s, session %s)",
85076754 771 print_channel_name(channel_name), session_name);
89476427 772 warn = 1;
025faf73 773 break;
9e2a1daf
CB		 774 case LTTNG_ERR_TRACE_ALREADY_STARTED:
775 {
776 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
777 ERR("Events: %s (channel %s, session %s)",
778 msg,
779 print_channel_name(channel_name),
780 session_name);
781 error = 1;
782 break;
783 }
025faf73
DG		 784 default:
785 ERR("Events: %s (channel %s, session %s)",
85076754
MD		 786 lttng_strerror(ret),
787 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
788 ? print_raw_channel_name(channel_name)
789 : print_channel_name(channel_name),
790 session_name);
89476427 791 error = 1;
025faf73
DG		 792 break;
793 }
794 goto end;
42224349 795 }
8c9ae521 796
025faf73
DG		 797 switch (opt_event_type) {
798 case LTTNG_EVENT_TRACEPOINT:
67b58630 799 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
9c48cab3 800 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
466b49a2
MD		 801
802 if (!exclusion_string) {
803 PERROR("Cannot allocate exclusion_string");
804 error = 1;
805 goto end;
806 }
9c48cab3 807 MSG("All %s tracepoints%s are enabled in channel %s for loglevel %s",
b9dfb167 808 get_domain_str(dom.type),
9c48cab3 809 exclusion_string,
85076754 810 print_channel_name(channel_name),
025faf73 811 opt_loglevel);
9c48cab3 812 free(exclusion_string);
025faf73 813 } else {
9c48cab3 814 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
466b49a2
MD		 815
816 if (!exclusion_string) {
817 PERROR("Cannot allocate exclusion_string");
818 error = 1;
819 goto end;
820 }
9c48cab3 821 MSG("All %s tracepoints%s are enabled in channel %s",
b9dfb167 822 get_domain_str(dom.type),
9c48cab3 823 exclusion_string,
85076754 824 print_channel_name(channel_name));
9c48cab3 825 free(exclusion_string);
025faf73
DG		 826 }
827 break;
828 case LTTNG_EVENT_SYSCALL:
829 if (opt_kernel) {
6e911cad
MD		 830 MSG("All %s system calls are enabled in channel %s",
831 get_domain_str(dom.type),
85076754 832 print_channel_name(channel_name));
025faf73
DG		 833 }
834 break;
835 case LTTNG_EVENT_ALL:
67b58630 836 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
9c48cab3 837 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
466b49a2
MD		 838
839 if (!exclusion_string) {
840 PERROR("Cannot allocate exclusion_string");
841 error = 1;
842 goto end;
843 }
9c48cab3 844 MSG("All %s events%s are enabled in channel %s for loglevel %s",
b9dfb167 845 get_domain_str(dom.type),
9c48cab3 846 exclusion_string,
85076754 847 print_channel_name(channel_name),
025faf73 848 opt_loglevel);
9c48cab3 849 free(exclusion_string);
025faf73 850 } else {
9c48cab3 851 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
466b49a2
MD		 852
853 if (!exclusion_string) {
854 PERROR("Cannot allocate exclusion_string");
855 error = 1;
856 goto end;
857 }
9c48cab3 858 MSG("All %s events%s are enabled in channel %s",
b9dfb167 859 get_domain_str(dom.type),
9c48cab3 860 exclusion_string,
85076754 861 print_channel_name(channel_name));
9c48cab3 862 free(exclusion_string);
025faf73
DG		 863 }
864 break;
865 default:
866 /*
867 * We should not be here since lttng_enable_event should have
868 * failed on the event type.
869 */
870 goto error;
57064ada 871 }
f3ed775e 872 }
89476427 873
025faf73 874 if (opt_filter) {
89476427 875 command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
7ed70bc9 876 opt_filter, exclusion_count, exclusion_list);
89476427
JRJ		 877 if (command_ret < 0) {
878 switch (-command_ret) {
16363652 879 case LTTNG_ERR_FILTER_EXIST:
85076754 880 WARN("Filter on all events is already enabled"
16363652 881 " (channel %s, session %s)",
85076754 882 print_channel_name(channel_name), session_name);
89476427 883 warn = 1;
16363652 884 break;
9e2a1daf
CB		 885 case LTTNG_ERR_TRACE_ALREADY_STARTED:
886 {
887 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
888 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
889 msg,
890 print_channel_name(channel_name),
891 session_name, opt_filter);
892 error = 1;
893 break;
894 }
16363652 895 default:
85076754 896 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
da3d7d0e
JRJ		 897 lttng_strerror(command_ret),
898 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
85076754
MD		 899 ? print_raw_channel_name(channel_name)
900 : print_channel_name(channel_name),
901 session_name, opt_filter);
89476427 902 error = 1;
16363652
DG		 903 break;
904 }
89476427 905 error_holder = command_ret;
16363652 906 } else {
89476427 907 ev.filter = 1;
16363652
DG		 908 MSG("Filter '%s' successfully set", opt_filter);
909 }
910 }
89476427
JRJ		 911
912 if (lttng_opt_mi) {
913 /* The wildcard * is used for kernel and ust domain to
914 * represent ALL. We copy * in event name to force the wildcard use
915 * for kernel domain
916 *
917 * Note: this is strictly for semantic and printing while in
918 * machine interface mode.
919 */
920 strcpy(ev.name, "*");
921
922 /* If we reach here the events are enabled */
923 if (!error && !warn) {
924 ev.enabled = 1;
925 } else {
926 ev.enabled = 0;
927 success = 0;
928 }
970d848b 929 ret = mi_lttng_event(writer, &ev, 1, handle->domain.type);
89476427
JRJ		 930 if (ret) {
931 ret = CMD_ERROR;
932 goto error;
933 }
934
935 /* print exclusion */
936 ret = mi_print_exclusion(exclusion_count, exclusion_list);
937 if (ret) {
938 ret = CMD_ERROR;
939 goto error;
940 }
941
942 /* Success ? */
943 ret = mi_lttng_writer_write_element_bool(writer,
944 mi_lttng_element_command_success, success);
945 if (ret) {
946 ret = CMD_ERROR;
947 goto error;
948 }
949
950 /* Close event element */
951 ret = mi_lttng_writer_close_element(writer);
952 if (ret) {
953 ret = CMD_ERROR;
954 goto error;
955 }
956 }
957
8c9ae521 958 goto end;
f3ed775e
DG		 959 }
960
961 /* Strip event list */
962 event_name = strtok(opt_event_list, ",");
963 while (event_name != NULL) {
6181537c
DG		 964 /* Copy name and type of the event */
965 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
966 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
967 ev.type = opt_event_type;
968
f3ed775e
DG		 969 /* Kernel tracer action */
970 if (opt_kernel) {
971 DBG("Enabling kernel event %s for channel %s",
85076754
MD		 972 event_name,
973 print_channel_name(channel_name));
f3ed775e
DG		 974
975 switch (opt_event_type) {
7a3d1328
MD		 976 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
977 ev.type = LTTNG_EVENT_TRACEPOINT;
978 /* Fall-through */
e6ddca71 979 case LTTNG_EVENT_TRACEPOINT:
f3ed775e 980 break;
7d29a247 981 case LTTNG_EVENT_PROBE:
cf0e5467 982 ret = parse_probe_opts(&ev, opt_probe);
49d4e302 983 if (ret) {
cf0e5467 984 ERR("Unable to parse probe options");
0d63dd19
DG		 985 ret = 0;
986 goto error;
987 }
f3ed775e
DG		 988 break;
989 case LTTNG_EVENT_FUNCTION:
8f0d098b 990 ret = parse_probe_opts(&ev, opt_function);
49d4e302 991 if (ret) {
8f0d098b
MD		 992 ERR("Unable to parse function probe options");
993 ret = 0;
994 goto error;
995 }
996 break;
997 case LTTNG_EVENT_FUNCTION_ENTRY:
6181537c
DG		 998 strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
999 LTTNG_SYMBOL_NAME_LEN);
99497cd0 1000 ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e 1001 break;
a54bd42d 1002 case LTTNG_EVENT_SYSCALL:
c6aa2d41
MD		 1003 ev.type = LTTNG_EVENT_SYSCALL;
1004 break;
f3ed775e 1005 default:
1ab1ea0b 1006 ret = CMD_UNDEFINED;
f3ed775e
DG		 1007 goto error;
1008 }
0cda4f28 1009
0cda4f28 1010 /* kernel loglevels not implemented */
8005f29a 1011 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
f3ed775e 1012 } else if (opt_userspace) { /* User-space tracer action */
d78d6610 1013#if 0
e14f64a8
DG		 1014 if (opt_cmd_name != NULL || opt_pid) {
1015 MSG("Only supporting tracing all UST processes (-u) for now.");
1ab1ea0b 1016 ret = CMD_UNDEFINED;
2bdd86d4
MD		 1017 goto error;
1018 }
d78d6610 1019#endif
6181537c 1020
300b8fd5 1021 DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
85076754 1022 print_channel_name(channel_name), opt_loglevel ? : "<all>");
2bdd86d4
MD		 1023
1024 switch (opt_event_type) {
1025 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
2bdd86d4
MD		 1026 /* Fall-through */
1027 case LTTNG_EVENT_TRACEPOINT:
e4baff1e
MD		 1028 /* Copy name and type of the event */
1029 ev.type = LTTNG_EVENT_TRACEPOINT;
1030 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
1031 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
2bdd86d4
MD		 1032 break;
1033 case LTTNG_EVENT_PROBE:
1034 case LTTNG_EVENT_FUNCTION:
1035 case LTTNG_EVENT_FUNCTION_ENTRY:
1036 case LTTNG_EVENT_SYSCALL:
1037 default:
cc62c0c0 1038 ERR("Event type not available for user-space tracing");
4ce78777 1039 ret = CMD_UNSUPPORTED;
2bdd86d4
MD		 1040 goto error;
1041 }
0cda4f28 1042
7ed70bc9 1043 if (opt_exclude) {
89476427 1044 ev.exclusion = 1;
d5dd17fd
JI		 1045 if (opt_event_type != LTTNG_EVENT_ALL && opt_event_type != LTTNG_EVENT_TRACEPOINT) {
1046 ERR("Exclusion option can only be used with tracepoint events");
1047 ret = CMD_ERROR;
1048 goto error;
1049 }
7ed70bc9
JI		 1050 /* Free previously allocated items */
1051 if (exclusion_list != NULL) {
1052 while (exclusion_count--) {
1053 free(exclusion_list[exclusion_count]);
1054 }
1055 free(exclusion_list);
1056 exclusion_list = NULL;
1057 }
1058 /* Check for proper subsets */
1059 ret = check_exclusion_subsets(event_name, opt_exclude,
1060 &exclusion_count, &exclusion_list);
1061 if (ret == CMD_ERROR) {
1062 goto error;
1063 }
1064 }
1065
0cda4f28 1066 ev.loglevel_type = opt_loglevel_type;
ed7f4083 1067 if (opt_loglevel) {
8005f29a
MD		 1068 ev.loglevel = loglevel_str_to_value(opt_loglevel);
1069 if (ev.loglevel == -1) {
1070 ERR("Unknown loglevel %s", opt_loglevel);
2f70b271 1071 ret = -LTTNG_ERR_INVALID;
8005f29a
MD		 1072 goto error;
1073 }
22e25b71
MD		 1074 } else {
1075 ev.loglevel = -1;
ed7f4083 1076 }
5cdb6027 1077 } else if (opt_jul || opt_log4j) {
b9dfb167
DG		 1078 if (opt_event_type != LTTNG_EVENT_ALL &&
1079 opt_event_type != LTTNG_EVENT_TRACEPOINT) {
5cdb6027 1080 ERR("Event type not supported for domain.");
b9dfb167
DG		 1081 ret = CMD_UNSUPPORTED;
1082 goto error;
1083 }
b2064f54
DG		 1084
1085 ev.loglevel_type = opt_loglevel_type;
1086 if (opt_loglevel) {
5cdb6027
DG		 1087 if (opt_jul) {
1088 ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
1089 } else if (opt_log4j) {
1090 ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
1091 }
b2064f54
DG		 1092 if (ev.loglevel == -1) {
1093 ERR("Unknown loglevel %s", opt_loglevel);
1094 ret = -LTTNG_ERR_INVALID;
1095 goto error;
1096 }
1097 } else {
5cdb6027
DG		 1098 if (opt_jul) {
1099 ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
1100 } else if (opt_log4j) {
1101 ev.loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
1102 }
b2064f54 1103 }
b9dfb167
DG		 1104 ev.type = LTTNG_EVENT_TRACEPOINT;
1105 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
1106 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e 1107 } else {
b9dfb167 1108 print_missing_domain();
300b8fd5 1109 ret = CMD_ERROR;
f3ed775e
DG		 1110 goto error;
1111 }
1112
025faf73 1113 if (!opt_filter) {
9c48cab3
JI		 1114 char *exclusion_string;
1115
89476427 1116 command_ret = lttng_enable_event_with_exclusions(handle,
7ed70bc9
JI		 1117 &ev, channel_name,
1118 NULL, exclusion_count, exclusion_list);
9c48cab3 1119 exclusion_string = print_exclusions(exclusion_count, exclusion_list);
466b49a2
MD		 1120 if (!exclusion_string) {
1121 PERROR("Cannot allocate exclusion_string");
1122 error = 1;
1123 goto end;
1124 }
89476427 1125 if (command_ret < 0) {
025faf73 1126 /* Turn ret to positive value to handle the positive error code */
89476427 1127 switch (-command_ret) {
025faf73 1128 case LTTNG_ERR_KERN_EVENT_EXIST:
9c48cab3 1129 WARN("Kernel event %s%s already enabled (channel %s, session %s)",
85076754 1130 event_name,
9c48cab3 1131 exclusion_string,
85076754 1132 print_channel_name(channel_name), session_name);
89476427 1133 warn = 1;
025faf73 1134 break;
9e2a1daf
CB		 1135 case LTTNG_ERR_TRACE_ALREADY_STARTED:
1136 {
1137 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
1138 ERR("Event %s%s: %s (channel %s, session %s)", event_name,
1139 exclusion_string,
1140 msg,
1141 print_channel_name(channel_name),
1142 session_name);
1143 error = 1;
1144 break;
1145 }
025faf73 1146 default:
9c48cab3
JI		 1147 ERR("Event %s%s: %s (channel %s, session %s)", event_name,
1148 exclusion_string,
da3d7d0e
JRJ		 1149 lttng_strerror(command_ret),
1150 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
85076754
MD		 1151 ? print_raw_channel_name(channel_name)
1152 : print_channel_name(channel_name),
1153 session_name);
89476427 1154 error = 1;
025faf73
DG		 1155 break;
1156 }
89476427 1157 error_holder = command_ret;
025faf73 1158 } else {
5cdb6027
DG		 1159 /* So we don't print the default channel name for agent domain. */
1160 if (dom.type == LTTNG_DOMAIN_JUL ||
1161 dom.type == LTTNG_DOMAIN_LOG4J) {
49ceaa70
DG		 1162 MSG("%s event %s%s enabled.",
1163 get_domain_str(dom.type), event_name,
1164 exclusion_string);
1165 } else {
1166 MSG("%s event %s%s created in channel %s",
1167 get_domain_str(dom.type), event_name,
1168 exclusion_string,
1169 print_channel_name(channel_name));
1170 }
42224349 1171 }
9c48cab3 1172 free(exclusion_string);
6181537c 1173 }
025faf73
DG		 1174
1175 if (opt_filter) {
9c48cab3
JI		 1176 char *exclusion_string;
1177
89476427
JRJ		 1178 /* Filter present */
1179 ev.filter = 1;
1180
1181 command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
7ed70bc9 1182 opt_filter, exclusion_count, exclusion_list);
9c48cab3 1183 exclusion_string = print_exclusions(exclusion_count, exclusion_list);
466b49a2
MD		 1184 if (!exclusion_string) {
1185 PERROR("Cannot allocate exclusion_string");
1186 error = 1;
1187 goto end;
1188 }
89476427
JRJ		 1189 if (command_ret < 0) {
1190 switch (-command_ret) {
7671f53c 1191 case LTTNG_ERR_FILTER_EXIST:
9c48cab3 1192 WARN("Filter on event %s%s is already enabled"
7671f53c 1193 " (channel %s, session %s)",
85076754 1194 event_name,
9c48cab3 1195 exclusion_string,
85076754 1196 print_channel_name(channel_name), session_name);
89476427 1197 warn = 1;
7671f53c 1198 break;
9e2a1daf
CB		 1199 case LTTNG_ERR_TRACE_ALREADY_STARTED:
1200 {
1201 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
1202 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
1203 exclusion_string,
1204 msg,
1205 print_channel_name(channel_name),
1206 session_name, opt_filter);
1207 error = 1;
1208 break;
1209 }
7671f53c 1210 default:
9c48cab3
JI		 1211 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
1212 exclusion_string,
da3d7d0e
JRJ		 1213 lttng_strerror(command_ret),
1214 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
85076754
MD		 1215 ? print_raw_channel_name(channel_name)
1216 : print_channel_name(channel_name),
1217 session_name, opt_filter);
89476427 1218 error = 1;
7671f53c
CB		 1219 break;
1220 }
89476427
JRJ		 1221 error_holder = command_ret;
1222
16363652 1223 } else {
9c48cab3
JI		 1224 MSG("Event %s%s: Filter '%s' successfully set",
1225 event_name, exclusion_string,
1226 opt_filter);
53a80697 1227 }
9c48cab3 1228 free(exclusion_string);
53a80697 1229 }
6181537c 1230
89476427
JRJ		 1231 if (lttng_opt_mi) {
1232 if (command_ret) {
1233 success = 0;
1234 ev.enabled = 0;
1235 } else {
1236 ev.enabled = 1;
1237 }
1238
970d848b 1239 ret = mi_lttng_event(writer, &ev, 1, handle->domain.type);
89476427
JRJ		 1240 if (ret) {
1241 ret = CMD_ERROR;
1242 goto error;
1243 }
1244
1245 /* print exclusion */
1246 ret = mi_print_exclusion(exclusion_count, exclusion_list);
1247 if (ret) {
1248 ret = CMD_ERROR;
1249 goto error;
1250 }
1251
1252 /* Success ? */
1253 ret = mi_lttng_writer_write_element_bool(writer,
1254 mi_lttng_element_command_success, success);
1255 if (ret) {
1256 ret = CMD_ERROR;
1257 goto end;
1258 }
1259
1260 /* Close event element */
1261 ret = mi_lttng_writer_close_element(writer);
1262 if (ret) {
1263 ret = CMD_ERROR;
1264 goto end;
1265 }
1266 }
1267
f3ed775e
DG		 1268 /* Next event */
1269 event_name = strtok(NULL, ",");
89476427
JRJ		 1270 /* Reset warn, error and success */
1271 success = 1;
f3ed775e
DG		 1272 }
1273
8c9ae521 1274end:
89476427
JRJ		 1275 /* Close Mi */
1276 if (lttng_opt_mi) {
1277 /* Close events element */
1278 ret = mi_lttng_writer_close_element(writer);
1279 if (ret) {
1280 ret = CMD_ERROR;
1281 goto error;
1282 }
1283 }
f3ed775e 1284error:
ae856491
DG		 1285 if (warn) {
1286 ret = CMD_WARNING;
1287 }
89476427
JRJ		 1288 if (error) {
1289 ret = CMD_ERROR;
1290 }
cd80958d
DG		 1291 lttng_destroy_handle(handle);
1292
7ed70bc9
JI		 1293 if (exclusion_list != NULL) {
1294 while (exclusion_count--) {
1295 free(exclusion_list[exclusion_count]);
1296 }
1297 free(exclusion_list);
1298 }
1299
89476427
JRJ		 1300 /* Overwrite ret with error_holder if there was an actual error with
1301 * enabling an event.
1302 */
1303 ret = error_holder ? error_holder : ret;
1304
f3ed775e
DG		 1305 return ret;
1306}
1307
1308/*
6181537c 1309 * Add event to trace session
f3ed775e
DG		 1310 */
1311int cmd_enable_events(int argc, const char **argv)
1312{
89476427 1313 int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
f3ed775e 1314 static poptContext pc;
cd80958d 1315 char *session_name = NULL;
de044b7a 1316 int event_type = -1;
f3ed775e
DG		 1317
1318 pc = poptGetContext(NULL, argc, argv, long_options, 0);
1319 poptReadDefaultConfig(pc, 0);
1320
1321 /* Default event type */
7a3d1328 1322 opt_event_type = LTTNG_EVENT_ALL;
f3ed775e
DG		 1323
1324 while ((opt = poptGetNextOpt(pc)) != -1) {
1325 switch (opt) {
1326 case OPT_HELP:
ca1c3607 1327 usage(stdout);
f3ed775e 1328 goto end;
f3ed775e 1329 case OPT_TRACEPOINT:
e6ddca71 1330 opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e 1331 break;
cf0e5467 1332 case OPT_PROBE:
7d29a247 1333 opt_event_type = LTTNG_EVENT_PROBE;
f3ed775e
DG		 1334 break;
1335 case OPT_FUNCTION:
1336 opt_event_type = LTTNG_EVENT_FUNCTION;
8f0d098b
MD		 1337 break;
1338 case OPT_FUNCTION_ENTRY:
1339 opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
f3ed775e 1340 break;
a54bd42d
MD		 1341 case OPT_SYSCALL:
1342 opt_event_type = LTTNG_EVENT_SYSCALL;
0133c199 1343 break;
eeac7d46
MD		 1344 case OPT_USERSPACE:
1345 opt_userspace = 1;
eeac7d46 1346 break;
0cda4f28 1347 case OPT_LOGLEVEL:
8005f29a 1348 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
0cda4f28
MD		 1349 opt_loglevel = poptGetOptArg(pc);
1350 break;
1351 case OPT_LOGLEVEL_ONLY:
8005f29a 1352 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
0cda4f28 1353 opt_loglevel = poptGetOptArg(pc);
13dce3b7 1354 break;
679b4943
SM		 1355 case OPT_LIST_OPTIONS:
1356 list_cmd_options(stdout, long_options);
679b4943 1357 goto end;
53a80697
MD		 1358 case OPT_FILTER:
1359 break;
fac3366c
JI		 1360 case OPT_EXCLUDE:
1361 break;
f3ed775e
DG		 1362 default:
1363 usage(stderr);
1364 ret = CMD_UNDEFINED;
1365 goto end;
1366 }
de044b7a
DG		 1367
1368 /* Validate event type. Multiple event type are not supported. */
1369 if (event_type == -1) {
1370 event_type = opt_event_type;
1371 } else {
1372 if (event_type != opt_event_type) {
1373 ERR("Multiple event type not supported.");
1374 ret = CMD_ERROR;
1375 goto end;
1376 }
1377 }
f3ed775e
DG		 1378 }
1379
89476427
JRJ		 1380 /* Mi check */
1381 if (lttng_opt_mi) {
1382 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
1383 if (!writer) {
1384 ret = -LTTNG_ERR_NOMEM;
1385 goto end;
1386 }
1387
1388 /* Open command element */
1389 ret = mi_lttng_writer_command_open(writer,
1390 mi_lttng_element_command_enable_event);
1391 if (ret) {
1392 ret = CMD_ERROR;
1393 goto end;
1394 }
1395
1396 /* Open output element */
1397 ret = mi_lttng_writer_open_element(writer,
1398 mi_lttng_element_command_output);
1399 if (ret) {
1400 ret = CMD_ERROR;
1401 goto end;
1402 }
1403 }
1404
f3ed775e
DG		 1405 opt_event_list = (char*) poptGetArg(pc);
1406 if (opt_event_list == NULL && opt_enable_all == 0) {
1407 ERR("Missing event name(s).\n");
1408 usage(stderr);
ca1c3607 1409 ret = CMD_ERROR;
f3ed775e
DG		 1410 goto end;
1411 }
1412
cd80958d
DG		 1413 if (!opt_session_name) {
1414 session_name = get_session_name();
1415 if (session_name == NULL) {
89476427
JRJ		 1416 command_ret = CMD_ERROR;
1417 success = 0;
1418 goto mi_closing;
cd80958d
DG		 1419 }
1420 } else {
1421 session_name = opt_session_name;
1422 }
1423
89476427
JRJ		 1424 command_ret = enable_events(session_name);
1425 if (command_ret) {
1426 success = 0;
1427 goto mi_closing;
1428 }
1429
1430mi_closing:
1431 /* Mi closing */
1432 if (lttng_opt_mi) {
1433 /* Close output element */
1434 ret = mi_lttng_writer_close_element(writer);
1435 if (ret) {
1436 ret = CMD_ERROR;
1437 goto end;
1438 }
1439
1440 ret = mi_lttng_writer_write_element_bool(writer,
1441 mi_lttng_element_command_success, success);
1442 if (ret) {
1443 ret = CMD_ERROR;
1444 goto end;
1445 }
1446
1447 /* Command element close */
1448 ret = mi_lttng_writer_command_close(writer);
1449 if (ret) {
1450 ret = CMD_ERROR;
1451 goto end;
1452 }
1453 }
f3ed775e
DG		 1454
1455end:
89476427
JRJ		 1456 /* Mi clean-up */
1457 if (writer && mi_lttng_writer_destroy(writer)) {
1458 /* Preserve original error code */
1459 ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
1460 }
1461
cd80958d
DG		 1462 if (opt_session_name == NULL) {
1463 free(session_name);
1464 }
1465
89476427
JRJ		 1466 /* Overwrite ret if an error occurred in enable_events */
1467 ret = command_ret ? command_ret : ret;
1468
ca1c3607 1469 poptFreeContext(pc);
f3ed775e
DG		 1470 return ret;
1471}
LTTng 2.0 tools and control repository
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