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Fix: initialize live_timer to 0 for snapshot session
[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
6c1c0768 19#define _LGPL_SOURCE
b2064f54 20#include <assert.h>
f3ed775e
DG		 21#include <popt.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25#include <sys/stat.h>
26#include <sys/types.h>
27#include <unistd.h>
5a0de755 28#include <inttypes.h>
8f0d098b 29#include <ctype.h>
f3ed775e 30
42224349 31#include <src/common/sessiond-comm/sessiond-comm.h>
f3ed775e 32
89476427
JRJ		 33/* Mi dependancy */
34#include <common/mi-lttng.h>
35
36#include "../command.h"
37
8ab7c0d9
MD		 38#if (LTTNG_SYMBOL_NAME_LEN == 256)
39#define LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "255"
40#endif
41
f3ed775e
DG		 42static char *opt_event_list;
43static int opt_event_type;
0cda4f28
MD		 44static const char *opt_loglevel;
45static int opt_loglevel_type;
6181537c 46static int opt_kernel;
5440dc42 47static char *opt_session_name;
f3ed775e 48static int opt_userspace;
b9dfb167 49static int opt_jul;
5cdb6027 50static int opt_log4j;
0e115563 51static int opt_python;
f3ed775e 52static int opt_enable_all;
cf0e5467 53static char *opt_probe;
8f0d098b 54static char *opt_function;
f3ed775e 55static char *opt_channel_name;
53a80697 56static char *opt_filter;
fac3366c 57static char *opt_exclude;
f3ed775e
DG		 58
59enum {
60 OPT_HELP = 1,
f3ed775e 61 OPT_TRACEPOINT,
cf0e5467 62 OPT_PROBE,
f3ed775e 63 OPT_FUNCTION,
a54bd42d 64 OPT_SYSCALL,
eeac7d46 65 OPT_USERSPACE,
0cda4f28
MD		 66 OPT_LOGLEVEL,
67 OPT_LOGLEVEL_ONLY,
679b4943 68 OPT_LIST_OPTIONS,
53a80697 69 OPT_FILTER,
fac3366c 70 OPT_EXCLUDE,
f3ed775e
DG		 71};
72
cd80958d 73static struct lttng_handle *handle;
89476427 74static struct mi_writer *writer;
cd80958d 75
f3ed775e
DG		 76static struct poptOption long_options[] = {
77 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
78 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42 79 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
e14f64a8 80 {"all", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
f3ed775e
DG		 81 {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
82 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
d78d6610 83 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
b9dfb167 84 {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
5cdb6027 85 {"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0},
0e115563 86 {"python", 'p', POPT_ARG_VAL, &opt_python, 1, 0, 0},
f3ed775e 87 {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
7ebae521 88 {"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
40e9d5d3 89 {"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
7ebae521 90 {"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
0cda4f28
MD		 91 {"loglevel", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL, 0, 0},
92 {"loglevel-only", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL_ONLY, 0, 0},
679b4943 93 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
53a80697 94 {"filter", 'f', POPT_ARG_STRING, &opt_filter, OPT_FILTER, 0, 0},
fac3366c 95 {"exclude", 'x', POPT_ARG_STRING, &opt_exclude, OPT_EXCLUDE, 0, 0},
f3ed775e
DG		 96 {0, 0, 0, 0, 0, 0, 0}
97};
98
99/*
100 * usage
101 */
102static void usage(FILE *ofp)
103{
313f1ac7 104 fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] (-k | -u | -j | -l | -p) [OPTIONS] \n");
f3ed775e 105 fprintf(ofp, "\n");
32a6298d 106 fprintf(ofp, "Options:\n");
f3ed775e 107 fprintf(ofp, " -h, --help Show this help\n");
679b4943 108 fprintf(ofp, " --list-options Simple listing of options\n");
32a6298d
DG		 109 fprintf(ofp, " -s, --session NAME Apply to session name\n");
110 fprintf(ofp, " -c, --channel NAME Apply to this channel\n");
e08bff8d 111 fprintf(ofp, " -a, --all Enable all tracepoints and syscalls\n");
f3ed775e 112 fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
27221701 113 fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
b9dfb167 114 fprintf(ofp, " -j, --jul Apply for Java application using JUL\n");
5cdb6027 115 fprintf(ofp, " -l, --log4j Apply for Java application using LOG4j\n");
23171d8c 116 fprintf(ofp, " -p, --python Apply for Python application\n");
f3ed775e
DG		 117 fprintf(ofp, "\n");
118 fprintf(ofp, "Event options:\n");
119 fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
be49af1e
MD		 120 fprintf(ofp, " - userspace tracer supports wildcards at end of string.\n");
121 fprintf(ofp, " Don't forget to quote to deal with bash expansion.\n");
122 fprintf(ofp, " e.g.:\n");
123 fprintf(ofp, " \"*\"\n");
124 fprintf(ofp, " \"app_component:na*\"\n");
6a240cd9 125 fprintf(ofp, " --probe (addr | symbol | symbol+offset)\n");
cf0e5467
MD		 126 fprintf(ofp, " Dynamic probe.\n");
127 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
128 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
6a240cd9 129 fprintf(ofp, " --function (addr | symbol | symbol+offset)\n");
8f0d098b
MD		 130 fprintf(ofp, " Dynamic function entry/return probe.\n");
131 fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
132 fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
a54bd42d 133 fprintf(ofp, " --syscall System call event\n");
f3ed775e 134 fprintf(ofp, "\n");
300b8fd5 135 fprintf(ofp, " --loglevel name\n");
f9e8873b 136 fprintf(ofp, " Tracepoint loglevel range from 0 to loglevel.\n");
372a6d2a 137 fprintf(ofp, " For JUL/LOG4j/Python domains, see the table below for the range values.\n");
300b8fd5
MD		 138 fprintf(ofp, " --loglevel-only name\n");
139 fprintf(ofp, " Tracepoint loglevel (only this loglevel)\n");
140 fprintf(ofp, "\n");
0c8477c8
MD		 141 fprintf(ofp, " The loglevel or loglevel-only options should be\n");
142 fprintf(ofp, " combined with a tracepoint name or tracepoint\n");
143 fprintf(ofp, " wildcard.\n");
144 fprintf(ofp, " Available loglevels:\n");
145 fprintf(ofp, " (higher value is more verbose)\n");
46839cc2
MD		 146 fprintf(ofp, " TRACE_EMERG = 0\n");
147 fprintf(ofp, " TRACE_ALERT = 1\n");
148 fprintf(ofp, " TRACE_CRIT = 2\n");
149 fprintf(ofp, " TRACE_ERR = 3\n");
150 fprintf(ofp, " TRACE_WARNING = 4\n");
151 fprintf(ofp, " TRACE_NOTICE = 5\n");
152 fprintf(ofp, " TRACE_INFO = 6\n");
153 fprintf(ofp, " TRACE_DEBUG_SYSTEM = 7\n");
154 fprintf(ofp, " TRACE_DEBUG_PROGRAM = 8\n");
155 fprintf(ofp, " TRACE_DEBUG_PROCESS = 9\n");
156 fprintf(ofp, " TRACE_DEBUG_MODULE = 10\n");
157 fprintf(ofp, " TRACE_DEBUG_UNIT = 11\n");
158 fprintf(ofp, " TRACE_DEBUG_FUNCTION = 12\n");
159 fprintf(ofp, " TRACE_DEBUG_LINE = 13\n");
160 fprintf(ofp, " TRACE_DEBUG = 14\n");
161 fprintf(ofp, " (shortcuts such as \"system\" are allowed)\n");
b2064f54
DG		 162 fprintf(ofp, "\n");
163 fprintf(ofp, " Available JUL domain loglevels:\n");
164 fprintf(ofp, " JUL_OFF = INT32_MAX\n");
165 fprintf(ofp, " JUL_SEVERE = %d\n", LTTNG_LOGLEVEL_JUL_SEVERE);
166 fprintf(ofp, " JUL_WARNING = %d\n", LTTNG_LOGLEVEL_JUL_WARNING);
167 fprintf(ofp, " JUL_INFO = %d\n", LTTNG_LOGLEVEL_JUL_INFO);
168 fprintf(ofp, " JUL_CONFIG = %d\n", LTTNG_LOGLEVEL_JUL_CONFIG);
169 fprintf(ofp, " JUL_FINE = %d\n", LTTNG_LOGLEVEL_JUL_FINE);
170 fprintf(ofp, " JUL_FINER = %d\n", LTTNG_LOGLEVEL_JUL_FINER);
171 fprintf(ofp, " JUL_FINEST = %d\n", LTTNG_LOGLEVEL_JUL_FINEST);
172 fprintf(ofp, " JUL_ALL = INT32_MIN\n");
173 fprintf(ofp, " (shortcuts such as \"severe\" are allowed)\n");
174 fprintf(ofp, "\n");
5cdb6027
DG		 175 fprintf(ofp, " Available LOG4j domain loglevels:\n");
176 fprintf(ofp, " LOG4J_OFF = INT32_MAX\n");
177 fprintf(ofp, " LOG4J_FATAL = %d\n", LTTNG_LOGLEVEL_LOG4J_FATAL);
178 fprintf(ofp, " LOG4J_ERROR = %d\n", LTTNG_LOGLEVEL_LOG4J_ERROR);
179 fprintf(ofp, " LOG4J_WARN = %d\n", LTTNG_LOGLEVEL_LOG4J_WARN);
180 fprintf(ofp, " LOG4J_INFO = %d\n", LTTNG_LOGLEVEL_LOG4J_INFO);
181 fprintf(ofp, " LOG4J_DEBUG = %d\n", LTTNG_LOGLEVEL_LOG4J_DEBUG);
182 fprintf(ofp, " LOG4J_TRACE = %d\n", LTTNG_LOGLEVEL_LOG4J_TRACE);
183 fprintf(ofp, " LOG4J_ALL = INT32_MIN\n");
184 fprintf(ofp, " (shortcuts such as \"severe\" are allowed)\n");
185 fprintf(ofp, "\n");
0e115563
DG		 186 fprintf(ofp, " Available Python domain loglevels:\n");
187 fprintf(ofp, " PYTHON_CRITICAL = %d\n", LTTNG_LOGLEVEL_PYTHON_CRITICAL);
188 fprintf(ofp, " PYTHON_ERROR = %d\n", LTTNG_LOGLEVEL_PYTHON_ERROR);
189 fprintf(ofp, " PYTHON_WARNING = %d\n", LTTNG_LOGLEVEL_PYTHON_WARNING);
190 fprintf(ofp, " PYTHON_INFO = %d\n", LTTNG_LOGLEVEL_PYTHON_INFO);
191 fprintf(ofp, " PYTHON_DEBUG = %d\n", LTTNG_LOGLEVEL_PYTHON_DEBUG);
192 fprintf(ofp, " PYTHON_NOTSET = %d\n", LTTNG_LOGLEVEL_PYTHON_NOTSET);
193 fprintf(ofp, " (shortcuts such as \"critical\" are allowed)\n");
194 fprintf(ofp, "\n");
f2611ab0 195 fprintf(ofp, " -f, --filter \'expression\'\n");
ee8ccafa
MD		 196 fprintf(ofp, " Filter expression on event fields and context.\n");
197 fprintf(ofp, " Event recording depends on evaluation.\n");
919e300c
MD		 198 fprintf(ofp, " Only specify on first activation of\n");
199 fprintf(ofp, " a given event within a session.\n");
200 fprintf(ofp, " Filter only allowed when enabling\n");
201 fprintf(ofp, " events within a session before tracing\n");
9bd578f5
MD		 202 fprintf(ofp, " is started. If the filter fails to link\n");
203 fprintf(ofp, " with the event within the traced domain,\n");
204 fprintf(ofp, " the event will be discarded. Currently,\n");
205 fprintf(ofp, " filter is only implemented for the user-space\n");
206 fprintf(ofp, " tracer.\n");
207 fprintf(ofp, " Expression examples:.\n");
208 fprintf(ofp, " \n");
209 fprintf(ofp, " 'intfield > 500 && intfield < 503'\n");
6a240cd9 210 fprintf(ofp, " '(strfield == \"test\" || intfield != 10) && intfield > 33'\n");
9bd578f5
MD		 211 fprintf(ofp, " 'doublefield > 1.1 && intfield < 5.3'\n");
212 fprintf(ofp, " \n");
213 fprintf(ofp, " Wildcards are allowed at the end of strings:\n");
214 fprintf(ofp, " 'seqfield1 == \"te*\"'\n");
215 fprintf(ofp, " In string literals, the escape character is '\\'.\n");
216 fprintf(ofp, " Use '\\*' for the '*' character, and '\\\\' for\n");
ee8ccafa
MD		 217 fprintf(ofp, " the '\\' character. Wildcard match any sequence of,\n");
218 fprintf(ofp, " characters including an empty sub-string (match 0 or\n");
219 fprintf(ofp, " more characters).\n");
220 fprintf(ofp, "\n");
221 fprintf(ofp, " Context information can be used for filtering. The\n");
222 fprintf(ofp, " examples below show usage of context filtering on\n");
223 fprintf(ofp, " process name (with a wildcard), process ID range, and\n");
224 fprintf(ofp, " unique thread ID for filtering. The process and\n");
225 fprintf(ofp, " thread ID of running applications can be found under\n");
226 fprintf(ofp, " columns \"PID\" and \"LWP\" of the \"ps -eLf\" command.\n");
227 fprintf(ofp, "\n");
228 fprintf(ofp, " '$ctx.procname == \"demo*\"'\n");
229 fprintf(ofp, " '$ctx.vpid >= 4433 && $ctx.vpid < 4455'\n");
230 fprintf(ofp, " '$ctx.vtid == 1234'\n");
c2063d0b
JI		 231 fprintf(ofp, " -x, --exclude LIST\n");
232 fprintf(ofp, " Add exclusions to UST tracepoints:\n");
233 fprintf(ofp, " Events that match any of the items\n");
234 fprintf(ofp, " in the comma-separated LIST are not\n");
235 fprintf(ofp, " enabled, even if they match a wildcard\n");
236 fprintf(ofp, " definition of the event.\n");
300b8fd5 237 fprintf(ofp, "\n");
f3ed775e
DG		 238}
239
0d63dd19 240/*
6181537c 241 * Parse probe options.
0d63dd19 242 */
cf0e5467 243static int parse_probe_opts(struct lttng_event *ev, char *opt)
0d63dd19 244{
49d4e302
JRJ		 245 int ret = CMD_SUCCESS;
246 int match;
8ff0bbd0 247 char s_hex[19];
8ab7c0d9 248#define S_HEX_LEN_SCANF_IS_A_BROKEN_API "18" /* 18 is (19 - 1) (\0 is extra) */
0d63dd19
DG		 249 char name[LTTNG_SYMBOL_NAME_LEN];
250
251 if (opt == NULL) {
49d4e302 252 ret = CMD_ERROR;
8f0d098b 253 goto end;
0d63dd19
DG		 254 }
255
256 /* Check for symbol+offset */
49d4e302 257 match = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API
8ab7c0d9 258 "[^'+']+%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", name, s_hex);
49d4e302 259 if (match == 2) {
7d29a247 260 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0 261 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
cf0e5467 262 DBG("probe symbol %s", ev->attr.probe.symbol_name);
9d035200 263 if (*s_hex == '\0') {
8ff0bbd0 264 ERR("Invalid probe offset %s", s_hex);
49d4e302 265 ret = CMD_ERROR;
8f0d098b 266 goto end;
0d63dd19 267 }
8ff0bbd0 268 ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
cf0e5467 269 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
3000dc78 270 ev->attr.probe.addr = 0;
8f0d098b
MD		 271 goto end;
272 }
273
274 /* Check for symbol */
275 if (isalpha(name[0])) {
49d4e302 276 match = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "s",
8ab7c0d9 277 name);
49d4e302 278 if (match == 1) {
8f0d098b 279 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0 280 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
8f0d098b
MD		 281 DBG("probe symbol %s", ev->attr.probe.symbol_name);
282 ev->attr.probe.offset = 0;
283 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
284 ev->attr.probe.addr = 0;
285 goto end;
286 }
0d63dd19
DG		 287 }
288
289 /* Check for address */
49d4e302
JRJ		 290 match = sscanf(opt, "%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", s_hex);
291 if (match > 0) {
9d035200 292 if (*s_hex == '\0') {
8ff0bbd0 293 ERR("Invalid probe address %s", s_hex);
49d4e302 294 ret = CMD_ERROR;
8f0d098b 295 goto end;
0d63dd19 296 }
8ff0bbd0 297 ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
cf0e5467 298 DBG("probe addr %" PRIu64, ev->attr.probe.addr);
3000dc78
DG		 299 ev->attr.probe.offset = 0;
300 memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
8f0d098b 301 goto end;
0d63dd19
DG		 302 }
303
304 /* No match */
49d4e302 305 ret = CMD_ERROR;
0d63dd19 306
8f0d098b 307end:
0d63dd19
DG		 308 return ret;
309}
310
5cdb6027
DG		 311/*
312 * Maps LOG4j loglevel from string to value
313 */
314static int loglevel_log4j_str_to_value(const char *inputstr)
315{
316 int i = 0;
317 char str[LTTNG_SYMBOL_NAME_LEN];
318
3712b110
JG		 319 if (!inputstr || strlen(inputstr) == 0) {
320 return -1;
321 }
322
5cdb6027
DG		 323 /*
324 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
325 * added at the end of the loop so a the upper bound we avoid the overflow.
326 */
327 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
328 str[i] = toupper(inputstr[i]);
329 i++;
330 }
331 str[i] = '\0';
332
333 if (!strcmp(str, "LOG4J_OFF") || !strcmp(str, "OFF")) {
334 return LTTNG_LOGLEVEL_LOG4J_OFF;
335 } else if (!strcmp(str, "LOG4J_FATAL") || !strcmp(str, "FATAL")) {
336 return LTTNG_LOGLEVEL_LOG4J_FATAL;
337 } else if (!strcmp(str, "LOG4J_ERROR") || !strcmp(str, "ERROR")) {
338 return LTTNG_LOGLEVEL_LOG4J_ERROR;
339 } else if (!strcmp(str, "LOG4J_WARN") || !strcmp(str, "WARN")) {
340 return LTTNG_LOGLEVEL_LOG4J_WARN;
341 } else if (!strcmp(str, "LOG4J_INFO") || !strcmp(str, "INFO")) {
342 return LTTNG_LOGLEVEL_LOG4J_INFO;
343 } else if (!strcmp(str, "LOG4J_DEBUG") || !strcmp(str, "DEBUG")) {
344 return LTTNG_LOGLEVEL_LOG4J_DEBUG;
345 } else if (!strcmp(str, "LOG4J_TRACE") || !strcmp(str, "TRACE")) {
346 return LTTNG_LOGLEVEL_LOG4J_TRACE;
347 } else if (!strcmp(str, "LOG4J_ALL") || !strcmp(str, "ALL")) {
348 return LTTNG_LOGLEVEL_LOG4J_ALL;
349 } else {
350 return -1;
351 }
352}
353
b2064f54
DG		 354/*
355 * Maps JUL loglevel from string to value
356 */
357static int loglevel_jul_str_to_value(const char *inputstr)
358{
359 int i = 0;
360 char str[LTTNG_SYMBOL_NAME_LEN];
361
3712b110
JG		 362 if (!inputstr || strlen(inputstr) == 0) {
363 return -1;
364 }
365
b2064f54
DG		 366 /*
367 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
368 * added at the end of the loop so a the upper bound we avoid the overflow.
369 */
370 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
371 str[i] = toupper(inputstr[i]);
372 i++;
373 }
374 str[i] = '\0';
375
376 if (!strcmp(str, "JUL_OFF") || !strcmp(str, "OFF")) {
377 return LTTNG_LOGLEVEL_JUL_OFF;
378 } else if (!strcmp(str, "JUL_SEVERE") || !strcmp(str, "SEVERE")) {
379 return LTTNG_LOGLEVEL_JUL_SEVERE;
380 } else if (!strcmp(str, "JUL_WARNING") || !strcmp(str, "WARNING")) {
381 return LTTNG_LOGLEVEL_JUL_WARNING;
382 } else if (!strcmp(str, "JUL_INFO") || !strcmp(str, "INFO")) {
383 return LTTNG_LOGLEVEL_JUL_INFO;
384 } else if (!strcmp(str, "JUL_CONFIG") || !strcmp(str, "CONFIG")) {
385 return LTTNG_LOGLEVEL_JUL_CONFIG;
386 } else if (!strcmp(str, "JUL_FINE") || !strcmp(str, "FINE")) {
387 return LTTNG_LOGLEVEL_JUL_FINE;
388 } else if (!strcmp(str, "JUL_FINER") || !strcmp(str, "FINER")) {
389 return LTTNG_LOGLEVEL_JUL_FINER;
390 } else if (!strcmp(str, "JUL_FINEST") || !strcmp(str, "FINEST")) {
391 return LTTNG_LOGLEVEL_JUL_FINEST;
392 } else if (!strcmp(str, "JUL_ALL") || !strcmp(str, "ALL")) {
393 return LTTNG_LOGLEVEL_JUL_ALL;
394 } else {
395 return -1;
396 }
397}
398
0e115563
DG		 399/*
400 * Maps Python loglevel from string to value
401 */
402static int loglevel_python_str_to_value(const char *inputstr)
403{
404 int i = 0;
405 char str[LTTNG_SYMBOL_NAME_LEN];
406
3712b110
JG		 407 if (!inputstr || strlen(inputstr) == 0) {
408 return -1;
409 }
410
0e115563
DG		 411 /*
412 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
413 * added at the end of the loop so a the upper bound we avoid the overflow.
414 */
415 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
416 str[i] = toupper(inputstr[i]);
417 i++;
418 }
419 str[i] = '\0';
420
421 if (!strcmp(str, "PYTHON_CRITICAL") || !strcmp(str, "CRITICAL")) {
422 return LTTNG_LOGLEVEL_PYTHON_CRITICAL;
423 } else if (!strcmp(str, "PYTHON_ERROR") || !strcmp(str, "ERROR")) {
424 return LTTNG_LOGLEVEL_PYTHON_ERROR;
425 } else if (!strcmp(str, "PYTHON_WARNING") || !strcmp(str, "WARNING")) {
426 return LTTNG_LOGLEVEL_PYTHON_WARNING;
427 } else if (!strcmp(str, "PYTHON_INFO") || !strcmp(str, "INFO")) {
428 return LTTNG_LOGLEVEL_PYTHON_INFO;
429 } else if (!strcmp(str, "PYTNON_DEBUG") || !strcmp(str, "DEBUG")) {
430 return LTTNG_LOGLEVEL_PYTHON_DEBUG;
431 } else if (!strcmp(str, "PYTHON_NOTSET") || !strcmp(str, "NOTSET")) {
432 return LTTNG_LOGLEVEL_PYTHON_NOTSET;
433 } else {
434 return -1;
435 }
436}
437
8005f29a 438/*
0c8477c8 439 * Maps loglevel from string to value
8005f29a
MD		 440 */
441static
46839cc2 442int loglevel_str_to_value(const char *inputstr)
8005f29a 443{
46839cc2
MD		 444 int i = 0;
445 char str[LTTNG_SYMBOL_NAME_LEN];
446
3712b110
JG		 447 if (!inputstr || strlen(inputstr) == 0) {
448 return -1;
449 }
450
e051e07c
DG		 451 /*
452 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
453 * added at the end of the loop so a the upper bound we avoid the overflow.
454 */
455 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
46839cc2
MD		 456 str[i] = toupper(inputstr[i]);
457 i++;
458 }
459 str[i] = '\0';
460 if (!strcmp(str, "TRACE_EMERG") || !strcmp(str, "EMERG")) {
461 return LTTNG_LOGLEVEL_EMERG;
462 } else if (!strcmp(str, "TRACE_ALERT") || !strcmp(str, "ALERT")) {
463 return LTTNG_LOGLEVEL_ALERT;
464 } else if (!strcmp(str, "TRACE_CRIT") || !strcmp(str, "CRIT")) {
465 return LTTNG_LOGLEVEL_CRIT;
466 } else if (!strcmp(str, "TRACE_ERR") || !strcmp(str, "ERR")) {
467 return LTTNG_LOGLEVEL_ERR;
468 } else if (!strcmp(str, "TRACE_WARNING") || !strcmp(str, "WARNING")) {
469 return LTTNG_LOGLEVEL_WARNING;
470 } else if (!strcmp(str, "TRACE_NOTICE") || !strcmp(str, "NOTICE")) {
471 return LTTNG_LOGLEVEL_NOTICE;
472 } else if (!strcmp(str, "TRACE_INFO") || !strcmp(str, "INFO")) {
473 return LTTNG_LOGLEVEL_INFO;
474 } else if (!strcmp(str, "TRACE_DEBUG_SYSTEM") || !strcmp(str, "DEBUG_SYSTEM") || !strcmp(str, "SYSTEM")) {
475 return LTTNG_LOGLEVEL_DEBUG_SYSTEM;
476 } else if (!strcmp(str, "TRACE_DEBUG_PROGRAM") || !strcmp(str, "DEBUG_PROGRAM") || !strcmp(str, "PROGRAM")) {
477 return LTTNG_LOGLEVEL_DEBUG_PROGRAM;
478 } else if (!strcmp(str, "TRACE_DEBUG_PROCESS") || !strcmp(str, "DEBUG_PROCESS") || !strcmp(str, "PROCESS")) {
479 return LTTNG_LOGLEVEL_DEBUG_PROCESS;
480 } else if (!strcmp(str, "TRACE_DEBUG_MODULE") || !strcmp(str, "DEBUG_MODULE") || !strcmp(str, "MODULE")) {
481 return LTTNG_LOGLEVEL_DEBUG_MODULE;
482 } else if (!strcmp(str, "TRACE_DEBUG_UNIT") || !strcmp(str, "DEBUG_UNIT") || !strcmp(str, "UNIT")) {
483 return LTTNG_LOGLEVEL_DEBUG_UNIT;
484 } else if (!strcmp(str, "TRACE_DEBUG_FUNCTION") || !strcmp(str, "DEBUG_FUNCTION") || !strcmp(str, "FUNCTION")) {
485 return LTTNG_LOGLEVEL_DEBUG_FUNCTION;
486 } else if (!strcmp(str, "TRACE_DEBUG_LINE") || !strcmp(str, "DEBUG_LINE") || !strcmp(str, "LINE")) {
487 return LTTNG_LOGLEVEL_DEBUG_LINE;
488 } else if (!strcmp(str, "TRACE_DEBUG") || !strcmp(str, "DEBUG")) {
489 return LTTNG_LOGLEVEL_DEBUG;
8005f29a
MD		 490 } else {
491 return -1;
492 }
493}
494
85076754
MD		 495static
496const char *print_channel_name(const char *name)
497{
498 return name ? : DEFAULT_CHANNEL_NAME;
499}
500
501static
502const char *print_raw_channel_name(const char *name)
503{
504 return name ? : "<default>";
505}
506
89476427
JRJ		 507/*
508 * Mi print exlcusion list
509 */
510static
511int mi_print_exclusion(int count, char **names)
512{
513 int i, ret;
514
515 assert(writer);
516
517 if (count == 0) {
518 ret = 0;
519 goto end;
520 }
521 ret = mi_lttng_writer_open_element(writer, config_element_exclusions);
522 if (ret) {
523 goto end;
524 }
525
526 for (i = 0; i < count; i++) {
527 ret = mi_lttng_writer_write_element_string(writer,
528 config_element_exclusion, names[i]);
529 if (ret) {
530 goto end;
531 }
532 }
533
534 /* Close exclusions element */
535 ret = mi_lttng_writer_close_element(writer);
536
537end:
538 return ret;
539}
540
9c48cab3
JI		 541/*
542 * Return allocated string for pretty-printing exclusion names.
543 */
544static
545char *print_exclusions(int count, char **names)
546{
547 int length = 0;
548 int i;
549 const char *preamble = " excluding ";
550 char *ret;
551
552 if (count == 0) {
553 return strdup("");
554 }
555
556 /* calculate total required length */
557 for (i = 0; i < count; i++) {
558 length += strlen(names[i]) + 1;
559 }
560
561 /* add length of preamble + one for NUL - one for last (missing) comma */
562 length += strlen(preamble);
fd591b18
MD		 563 ret = zmalloc(length);
564 if (!ret) {
565 return NULL;
566 }
9c48cab3
JI		 567 strncpy(ret, preamble, length);
568 for (i = 0; i < count; i++) {
569 strcat(ret, names[i]);
570 if (i != count - 1) {
571 strcat(ret, ",");
572 }
573 }
89476427 574
9c48cab3
JI		 575 return ret;
576}
577
748bde76
JI		 578/*
579 * Compare list of exclusions against an event name.
580 * Return a list of legal exclusion names.
581 * Produce an error or a warning about others (depending on the situation)
582 */
583static
584int check_exclusion_subsets(const char *event_name,
585 const char *exclusions,
586 int *exclusion_count_ptr,
587 char ***exclusion_list_ptr)
588{
589 const char *excluder_ptr;
590 const char *event_ptr;
591 const char *next_excluder;
592 int excluder_length;
593 int exclusion_count = 0;
594 char **exclusion_list = NULL;
595 int ret = CMD_SUCCESS;
596
597 if (event_name[strlen(event_name) - 1] != '*') {
598 ERR("Event %s: Excluders can only be used with wildcarded events", event_name);
599 goto error;
600 }
601
602 next_excluder = exclusions;
603 while (*next_excluder != 0) {
604 event_ptr = event_name;
605 excluder_ptr = next_excluder;
606 excluder_length = strcspn(next_excluder, ",");
607
608 /* Scan both the excluder and the event letter by letter */
609 while (1) {
610 char e, x;
611
612 e = *event_ptr;
613 x = *excluder_ptr;
614
615 if (x == '*') {
616 /* Event is a subset of the excluder */
617 ERR("Event %s: %.*s excludes all events from %s",
618 event_name,
619 excluder_length,
620 next_excluder,
621 event_name);
622 goto error;
623 }
624 if (e == '*') {
5ef79758
MD		 625 char *string;
626 char **new_exclusion_list;
627
748bde76 628 /* Excluder is a proper subset of event */
5ef79758
MD		 629 string = strndup(next_excluder, excluder_length);
630 if (!string) {
631 PERROR("strndup error");
632 goto error;
633 }
634 new_exclusion_list = realloc(exclusion_list,
1940b29e 635 sizeof(char *) * (exclusion_count + 1));
5ef79758
MD		 636 if (!new_exclusion_list) {
637 PERROR("realloc");
638 free(string);
639 goto error;
640 }
641 exclusion_list = new_exclusion_list;
748bde76 642 exclusion_count++;
5ef79758 643 exclusion_list[exclusion_count - 1] = string;
748bde76
JI		 644 break;
645 }
646 if (x != e) {
647 /* Excluder and event sets have no common elements */
648 WARN("Event %s: %.*s does not exclude any events from %s",
649 event_name,
650 excluder_length,
651 next_excluder,
652 event_name);
653 break;
654 }
655 excluder_ptr++;
656 event_ptr++;
657 }
658 /* next excluder */
659 next_excluder += excluder_length;
660 if (*next_excluder == ',') {
661 next_excluder++;
662 }
663 }
664 goto end;
665error:
666 while (exclusion_count--) {
667 free(exclusion_list[exclusion_count]);
668 }
669 if (exclusion_list != NULL) {
670 free(exclusion_list);
671 }
672 exclusion_list = NULL;
673 exclusion_count = 0;
674 ret = CMD_ERROR;
675end:
676 *exclusion_count_ptr = exclusion_count;
677 *exclusion_list_ptr = exclusion_list;
678 return ret;
679}
f3ed775e 680/*
6181537c 681 * Enabling event using the lttng API.
89476427 682 * Note: in case of error only the last error code will be return.
f3ed775e 683 */
cd80958d 684static int enable_events(char *session_name)
f3ed775e 685{
89476427
JRJ		 686 int ret = CMD_SUCCESS, command_ret = CMD_SUCCESS;
687 int error_holder = CMD_SUCCESS, warn = 0, error = 0, success = 1;
b73d0b29 688 char *event_name, *channel_name = NULL;
f3ed775e 689 struct lttng_event ev;
7d29a247 690 struct lttng_domain dom;
7ed70bc9
JI		 691 int exclusion_count = 0;
692 char **exclusion_list = NULL;
f3ed775e 693
441c16a7
MD		 694 memset(&ev, 0, sizeof(ev));
695 memset(&dom, 0, sizeof(dom));
696
53a80697 697 if (opt_kernel) {
67b58630
JG		 698 if (opt_loglevel) {
699 WARN("Kernel loglevels are not supported.");
700 }
53a80697
MD		 701 }
702
7d29a247
DG		 703 /* Create lttng domain */
704 if (opt_kernel) {
705 dom.type = LTTNG_DOMAIN_KERNEL;
7972aab2 706 dom.buf_type = LTTNG_BUFFER_GLOBAL;
d78d6610 707 } else if (opt_userspace) {
2bdd86d4 708 dom.type = LTTNG_DOMAIN_UST;
7972aab2 709 /* Default. */
8692d4e5 710 dom.buf_type = LTTNG_BUFFER_PER_UID;
b9dfb167
DG		 711 } else if (opt_jul) {
712 dom.type = LTTNG_DOMAIN_JUL;
713 /* Default. */
714 dom.buf_type = LTTNG_BUFFER_PER_UID;
5cdb6027
DG		 715 } else if (opt_log4j) {
716 dom.type = LTTNG_DOMAIN_LOG4J;
717 /* Default. */
718 dom.buf_type = LTTNG_BUFFER_PER_UID;
0e115563
DG		 719 } else if (opt_python) {
720 dom.type = LTTNG_DOMAIN_PYTHON;
721 /* Default. */
722 dom.buf_type = LTTNG_BUFFER_PER_UID;
6181537c 723 } else {
b9dfb167 724 print_missing_domain();
d16c1a4c 725 ret = CMD_ERROR;
6181537c 726 goto error;
2bdd86d4 727 }
7d29a247 728
d5dd17fd
JI		 729 if (opt_kernel && opt_exclude) {
730 ERR("Event name exclusions are not yet implemented for kernel events");
731 ret = CMD_ERROR;
732 goto error;
733 }
734
85076754 735 channel_name = opt_channel_name;
ae856491 736
cd80958d
DG		 737 handle = lttng_create_handle(session_name, &dom);
738 if (handle == NULL) {
739 ret = -1;
740 goto error;
741 }
1aef21b6 742
89476427
JRJ		 743 /* Prepare Mi */
744 if (lttng_opt_mi) {
745 /* Open a events element */
746 ret = mi_lttng_writer_open_element(writer, config_element_events);
747 if (ret) {
748 ret = CMD_ERROR;
749 goto error;
750 }
751 }
752
cd80958d 753 if (opt_enable_all) {
8c9ae521 754 /* Default setup for enable all */
75e8c5ab
MD		 755 if (opt_kernel) {
756 ev.type = opt_event_type;
29c62722 757 strcpy(ev.name, "*");
300b8fd5
MD		 758 /* kernel loglevels not implemented */
759 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
75e8c5ab
MD		 760 } else {
761 ev.type = LTTNG_EVENT_TRACEPOINT;
762 strcpy(ev.name, "*");
300b8fd5
MD		 763 ev.loglevel_type = opt_loglevel_type;
764 if (opt_loglevel) {
0e115563 765 assert(opt_userspace || opt_jul || opt_log4j || opt_python);
b2064f54
DG		 766 if (opt_userspace) {
767 ev.loglevel = loglevel_str_to_value(opt_loglevel);
768 } else if (opt_jul) {
769 ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
5cdb6027
DG		 770 } else if (opt_log4j) {
771 ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
0e115563
DG		 772 } else if (opt_python) {
773 ev.loglevel = loglevel_python_str_to_value(opt_loglevel);
b2064f54 774 }
300b8fd5
MD		 775 if (ev.loglevel == -1) {
776 ERR("Unknown loglevel %s", opt_loglevel);
2f70b271 777 ret = -LTTNG_ERR_INVALID;
300b8fd5
MD		 778 goto error;
779 }
22e25b71 780 } else {
0e115563 781 assert(opt_userspace || opt_jul || opt_log4j || opt_python);
b2064f54
DG		 782 if (opt_userspace) {
783 ev.loglevel = -1;
34aa3685 784 } else if (opt_jul) {
b2064f54 785 ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
34aa3685
JG		 786 } else if (opt_log4j) {
787 ev.loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
0e115563
DG		 788 } else if (opt_python) {
789 ev.loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG;
b2064f54 790 }
300b8fd5 791 }
75e8c5ab 792 }
8c9ae521 793
7ed70bc9
JI		 794 if (opt_exclude) {
795 ret = check_exclusion_subsets("*", opt_exclude,
796 &exclusion_count, &exclusion_list);
797 if (ret == CMD_ERROR) {
798 goto error;
799 }
89476427 800 ev.exclusion = 1;
7ed70bc9 801 }
025faf73 802 if (!opt_filter) {
7ed70bc9
JI		 803 ret = lttng_enable_event_with_exclusions(handle,
804 &ev, channel_name,
805 NULL,
806 exclusion_count, exclusion_list);
025faf73
DG		 807 if (ret < 0) {
808 switch (-ret) {
809 case LTTNG_ERR_KERN_EVENT_EXIST:
810 WARN("Kernel events already enabled (channel %s, session %s)",
85076754 811 print_channel_name(channel_name), session_name);
89476427 812 warn = 1;
025faf73 813 break;
45d5d421
CB		 814 case LTTNG_ERR_TRACE_ALREADY_STARTED:
815 {
816 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
817 ERR("Events: %s (channel %s, session %s)",
818 msg,
819 print_channel_name(channel_name),
820 session_name);
821 error = 1;
822 break;
823 }
025faf73
DG		 824 default:
825 ERR("Events: %s (channel %s, session %s)",
85076754
MD		 826 lttng_strerror(ret),
827 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
828 ? print_raw_channel_name(channel_name)
829 : print_channel_name(channel_name),
830 session_name);
89476427 831 error = 1;
025faf73
DG		 832 break;
833 }
834 goto end;
42224349 835 }
8c9ae521 836
025faf73
DG		 837 switch (opt_event_type) {
838 case LTTNG_EVENT_TRACEPOINT:
67b58630 839 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
9c48cab3 840 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
5ef79758
MD		 841
842 if (!exclusion_string) {
843 PERROR("Cannot allocate exclusion_string");
844 error = 1;
845 goto end;
846 }
9c48cab3 847 MSG("All %s tracepoints%s are enabled in channel %s for loglevel %s",
b9dfb167 848 get_domain_str(dom.type),
9c48cab3 849 exclusion_string,
85076754 850 print_channel_name(channel_name),
025faf73 851 opt_loglevel);
9c48cab3 852 free(exclusion_string);
025faf73 853 } else {
9c48cab3 854 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
5ef79758
MD		 855
856 if (!exclusion_string) {
857 PERROR("Cannot allocate exclusion_string");
858 error = 1;
859 goto end;
860 }
9c48cab3 861 MSG("All %s tracepoints%s are enabled in channel %s",
b9dfb167 862 get_domain_str(dom.type),
9c48cab3 863 exclusion_string,
85076754 864 print_channel_name(channel_name));
9c48cab3 865 free(exclusion_string);
025faf73
DG		 866 }
867 break;
868 case LTTNG_EVENT_SYSCALL:
869 if (opt_kernel) {
6e911cad
MD		 870 MSG("All %s system calls are enabled in channel %s",
871 get_domain_str(dom.type),
85076754 872 print_channel_name(channel_name));
025faf73
DG		 873 }
874 break;
875 case LTTNG_EVENT_ALL:
67b58630 876 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
9c48cab3 877 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
5ef79758
MD		 878
879 if (!exclusion_string) {
880 PERROR("Cannot allocate exclusion_string");
881 error = 1;
882 goto end;
883 }
9c48cab3 884 MSG("All %s events%s are enabled in channel %s for loglevel %s",
b9dfb167 885 get_domain_str(dom.type),
9c48cab3 886 exclusion_string,
85076754 887 print_channel_name(channel_name),
025faf73 888 opt_loglevel);
9c48cab3 889 free(exclusion_string);
025faf73 890 } else {
9c48cab3 891 char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
5ef79758
MD		 892
893 if (!exclusion_string) {
894 PERROR("Cannot allocate exclusion_string");
895 error = 1;
896 goto end;
897 }
9c48cab3 898 MSG("All %s events%s are enabled in channel %s",
b9dfb167 899 get_domain_str(dom.type),
9c48cab3 900 exclusion_string,
85076754 901 print_channel_name(channel_name));
9c48cab3 902 free(exclusion_string);
025faf73
DG		 903 }
904 break;
905 default:
906 /*
907 * We should not be here since lttng_enable_event should have
908 * failed on the event type.
909 */
910 goto error;
57064ada 911 }
f3ed775e 912 }
89476427 913
025faf73 914 if (opt_filter) {
89476427 915 command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
7ed70bc9 916 opt_filter, exclusion_count, exclusion_list);
89476427
JRJ		 917 if (command_ret < 0) {
918 switch (-command_ret) {
16363652 919 case LTTNG_ERR_FILTER_EXIST:
85076754 920 WARN("Filter on all events is already enabled"
16363652 921 " (channel %s, session %s)",
85076754 922 print_channel_name(channel_name), session_name);
89476427 923 warn = 1;
16363652 924 break;
45d5d421
CB		 925 case LTTNG_ERR_TRACE_ALREADY_STARTED:
926 {
927 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
928 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
929 msg,
930 print_channel_name(channel_name),
931 session_name, opt_filter);
932 error = 1;
933 break;
934 }
16363652 935 default:
85076754 936 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
da3d7d0e
JRJ		 937 lttng_strerror(command_ret),
938 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
85076754
MD		 939 ? print_raw_channel_name(channel_name)
940 : print_channel_name(channel_name),
941 session_name, opt_filter);
89476427 942 error = 1;
16363652
DG		 943 break;
944 }
89476427 945 error_holder = command_ret;
16363652 946 } else {
89476427 947 ev.filter = 1;
16363652
DG		 948 MSG("Filter '%s' successfully set", opt_filter);
949 }
950 }
89476427
JRJ		 951
952 if (lttng_opt_mi) {
953 /* The wildcard * is used for kernel and ust domain to
954 * represent ALL. We copy * in event name to force the wildcard use
955 * for kernel domain
956 *
957 * Note: this is strictly for semantic and printing while in
958 * machine interface mode.
959 */
960 strcpy(ev.name, "*");
961
962 /* If we reach here the events are enabled */
963 if (!error && !warn) {
964 ev.enabled = 1;
965 } else {
966 ev.enabled = 0;
967 success = 0;
968 }
970d848b 969 ret = mi_lttng_event(writer, &ev, 1, handle->domain.type);
89476427
JRJ		 970 if (ret) {
971 ret = CMD_ERROR;
972 goto error;
973 }
974
975 /* print exclusion */
976 ret = mi_print_exclusion(exclusion_count, exclusion_list);
977 if (ret) {
978 ret = CMD_ERROR;
979 goto error;
980 }
981
982 /* Success ? */
983 ret = mi_lttng_writer_write_element_bool(writer,
984 mi_lttng_element_command_success, success);
985 if (ret) {
986 ret = CMD_ERROR;
987 goto error;
988 }
989
990 /* Close event element */
991 ret = mi_lttng_writer_close_element(writer);
992 if (ret) {
993 ret = CMD_ERROR;
994 goto error;
995 }
996 }
997
8c9ae521 998 goto end;
f3ed775e
DG		 999 }
1000
1001 /* Strip event list */
1002 event_name = strtok(opt_event_list, ",");
1003 while (event_name != NULL) {
6181537c
DG		 1004 /* Copy name and type of the event */
1005 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
1006 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
1007 ev.type = opt_event_type;
1008
f3ed775e
DG		 1009 /* Kernel tracer action */
1010 if (opt_kernel) {
1011 DBG("Enabling kernel event %s for channel %s",
85076754
MD		 1012 event_name,
1013 print_channel_name(channel_name));
f3ed775e
DG		 1014
1015 switch (opt_event_type) {
29c62722
MD		 1016 case LTTNG_EVENT_ALL: /* Enable tracepoints and syscalls */
1017 /* If event name differs from *, select tracepoint. */
1018 if (strcmp(ev.name, "*")) {
1019 ev.type = LTTNG_EVENT_TRACEPOINT;
1020 }
1021 break;
e6ddca71 1022 case LTTNG_EVENT_TRACEPOINT:
f3ed775e 1023 break;
7d29a247 1024 case LTTNG_EVENT_PROBE:
cf0e5467 1025 ret = parse_probe_opts(&ev, opt_probe);
49d4e302 1026 if (ret) {
cf0e5467 1027 ERR("Unable to parse probe options");
0d63dd19
DG		 1028 ret = 0;
1029 goto error;
1030 }
f3ed775e
DG		 1031 break;
1032 case LTTNG_EVENT_FUNCTION:
8f0d098b 1033 ret = parse_probe_opts(&ev, opt_function);
49d4e302 1034 if (ret) {
8f0d098b
MD		 1035 ERR("Unable to parse function probe options");
1036 ret = 0;
1037 goto error;
1038 }
1039 break;
a54bd42d 1040 case LTTNG_EVENT_SYSCALL:
c6aa2d41
MD		 1041 ev.type = LTTNG_EVENT_SYSCALL;
1042 break;
f3ed775e 1043 default:
1ab1ea0b 1044 ret = CMD_UNDEFINED;
f3ed775e
DG		 1045 goto error;
1046 }
0cda4f28 1047
0cda4f28 1048 /* kernel loglevels not implemented */
8005f29a 1049 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
f3ed775e 1050 } else if (opt_userspace) { /* User-space tracer action */
300b8fd5 1051 DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
85076754 1052 print_channel_name(channel_name), opt_loglevel ? : "<all>");
2bdd86d4
MD		 1053
1054 switch (opt_event_type) {
1055 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
2bdd86d4
MD		 1056 /* Fall-through */
1057 case LTTNG_EVENT_TRACEPOINT:
e4baff1e
MD		 1058 /* Copy name and type of the event */
1059 ev.type = LTTNG_EVENT_TRACEPOINT;
1060 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
1061 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
2bdd86d4
MD		 1062 break;
1063 case LTTNG_EVENT_PROBE:
1064 case LTTNG_EVENT_FUNCTION:
2bdd86d4
MD		 1065 case LTTNG_EVENT_SYSCALL:
1066 default:
cc62c0c0 1067 ERR("Event type not available for user-space tracing");
4ce78777 1068 ret = CMD_UNSUPPORTED;
2bdd86d4
MD		 1069 goto error;
1070 }
0cda4f28 1071
7ed70bc9 1072 if (opt_exclude) {
89476427 1073 ev.exclusion = 1;
d5dd17fd
JI		 1074 if (opt_event_type != LTTNG_EVENT_ALL && opt_event_type != LTTNG_EVENT_TRACEPOINT) {
1075 ERR("Exclusion option can only be used with tracepoint events");
1076 ret = CMD_ERROR;
1077 goto error;
1078 }
7ed70bc9
JI		 1079 /* Free previously allocated items */
1080 if (exclusion_list != NULL) {
1081 while (exclusion_count--) {
1082 free(exclusion_list[exclusion_count]);
1083 }
1084 free(exclusion_list);
1085 exclusion_list = NULL;
1086 }
1087 /* Check for proper subsets */
1088 ret = check_exclusion_subsets(event_name, opt_exclude,
1089 &exclusion_count, &exclusion_list);
1090 if (ret == CMD_ERROR) {
1091 goto error;
1092 }
1093 }
1094
0cda4f28 1095 ev.loglevel_type = opt_loglevel_type;
ed7f4083 1096 if (opt_loglevel) {
8005f29a
MD		 1097 ev.loglevel = loglevel_str_to_value(opt_loglevel);
1098 if (ev.loglevel == -1) {
1099 ERR("Unknown loglevel %s", opt_loglevel);
2f70b271 1100 ret = -LTTNG_ERR_INVALID;
8005f29a
MD		 1101 goto error;
1102 }
22e25b71
MD		 1103 } else {
1104 ev.loglevel = -1;
ed7f4083 1105 }
0e115563 1106 } else if (opt_jul || opt_log4j || opt_python) {
b9dfb167
DG		 1107 if (opt_event_type != LTTNG_EVENT_ALL &&
1108 opt_event_type != LTTNG_EVENT_TRACEPOINT) {
5cdb6027 1109 ERR("Event type not supported for domain.");
b9dfb167
DG		 1110 ret = CMD_UNSUPPORTED;
1111 goto error;
1112 }
b2064f54
DG		 1113
1114 ev.loglevel_type = opt_loglevel_type;
1115 if (opt_loglevel) {
5cdb6027
DG		 1116 if (opt_jul) {
1117 ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
1118 } else if (opt_log4j) {
1119 ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
0e115563
DG		 1120 } else if (opt_python) {
1121 ev.loglevel = loglevel_python_str_to_value(opt_loglevel);
5cdb6027 1122 }
b2064f54
DG		 1123 if (ev.loglevel == -1) {
1124 ERR("Unknown loglevel %s", opt_loglevel);
1125 ret = -LTTNG_ERR_INVALID;
1126 goto error;
1127 }
1128 } else {
5cdb6027
DG		 1129 if (opt_jul) {
1130 ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
1131 } else if (opt_log4j) {
1132 ev.loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
0e115563
DG		 1133 } else if (opt_python) {
1134 ev.loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG;
5cdb6027 1135 }
b2064f54 1136 }
b9dfb167
DG		 1137 ev.type = LTTNG_EVENT_TRACEPOINT;
1138 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
1139 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e 1140 } else {
b9dfb167 1141 print_missing_domain();
300b8fd5 1142 ret = CMD_ERROR;
f3ed775e
DG		 1143 goto error;
1144 }
1145
025faf73 1146 if (!opt_filter) {
9c48cab3
JI		 1147 char *exclusion_string;
1148
89476427 1149 command_ret = lttng_enable_event_with_exclusions(handle,
7ed70bc9
JI		 1150 &ev, channel_name,
1151 NULL, exclusion_count, exclusion_list);
9c48cab3 1152 exclusion_string = print_exclusions(exclusion_count, exclusion_list);
5ef79758
MD		 1153 if (!exclusion_string) {
1154 PERROR("Cannot allocate exclusion_string");
1155 error = 1;
1156 goto end;
1157 }
89476427 1158 if (command_ret < 0) {
025faf73 1159 /* Turn ret to positive value to handle the positive error code */
89476427 1160 switch (-command_ret) {
025faf73 1161 case LTTNG_ERR_KERN_EVENT_EXIST:
9c48cab3 1162 WARN("Kernel event %s%s already enabled (channel %s, session %s)",
85076754 1163 event_name,
9c48cab3 1164 exclusion_string,
85076754 1165 print_channel_name(channel_name), session_name);
89476427 1166 warn = 1;
025faf73 1167 break;
45d5d421
CB		 1168 case LTTNG_ERR_TRACE_ALREADY_STARTED:
1169 {
1170 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
1171 ERR("Event %s%s: %s (channel %s, session %s)", event_name,
1172 exclusion_string,
1173 msg,
1174 print_channel_name(channel_name),
1175 session_name);
1176 error = 1;
1177 break;
1178 }
025faf73 1179 default:
9c48cab3
JI		 1180 ERR("Event %s%s: %s (channel %s, session %s)", event_name,
1181 exclusion_string,
da3d7d0e
JRJ		 1182 lttng_strerror(command_ret),
1183 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
85076754
MD		 1184 ? print_raw_channel_name(channel_name)
1185 : print_channel_name(channel_name),
1186 session_name);
89476427 1187 error = 1;
025faf73
DG		 1188 break;
1189 }
89476427 1190 error_holder = command_ret;
025faf73 1191 } else {
5cdb6027
DG		 1192 /* So we don't print the default channel name for agent domain. */
1193 if (dom.type == LTTNG_DOMAIN_JUL ||
1194 dom.type == LTTNG_DOMAIN_LOG4J) {
49ceaa70
DG		 1195 MSG("%s event %s%s enabled.",
1196 get_domain_str(dom.type), event_name,
1197 exclusion_string);
1198 } else {
1199 MSG("%s event %s%s created in channel %s",
1200 get_domain_str(dom.type), event_name,
1201 exclusion_string,
1202 print_channel_name(channel_name));
1203 }
42224349 1204 }
9c48cab3 1205 free(exclusion_string);
6181537c 1206 }
025faf73
DG		 1207
1208 if (opt_filter) {
9c48cab3
JI		 1209 char *exclusion_string;
1210
89476427
JRJ		 1211 /* Filter present */
1212 ev.filter = 1;
1213
1214 command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
7ed70bc9 1215 opt_filter, exclusion_count, exclusion_list);
9c48cab3 1216 exclusion_string = print_exclusions(exclusion_count, exclusion_list);
5ef79758
MD		 1217 if (!exclusion_string) {
1218 PERROR("Cannot allocate exclusion_string");
1219 error = 1;
1220 goto end;
1221 }
89476427
JRJ		 1222 if (command_ret < 0) {
1223 switch (-command_ret) {
7671f53c 1224 case LTTNG_ERR_FILTER_EXIST:
9c48cab3 1225 WARN("Filter on event %s%s is already enabled"
7671f53c 1226 " (channel %s, session %s)",
85076754 1227 event_name,
9c48cab3 1228 exclusion_string,
85076754 1229 print_channel_name(channel_name), session_name);
89476427 1230 warn = 1;
7671f53c 1231 break;
45d5d421
CB		 1232 case LTTNG_ERR_TRACE_ALREADY_STARTED:
1233 {
1234 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
1235 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
1236 exclusion_string,
1237 msg,
1238 print_channel_name(channel_name),
1239 session_name, opt_filter);
1240 error = 1;
1241 break;
1242 }
7671f53c 1243 default:
9c48cab3
JI		 1244 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
1245 exclusion_string,
da3d7d0e
JRJ		 1246 lttng_strerror(command_ret),
1247 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
85076754
MD		 1248 ? print_raw_channel_name(channel_name)
1249 : print_channel_name(channel_name),
1250 session_name, opt_filter);
89476427 1251 error = 1;
7671f53c
CB		 1252 break;
1253 }
89476427
JRJ		 1254 error_holder = command_ret;
1255
16363652 1256 } else {
9c48cab3
JI		 1257 MSG("Event %s%s: Filter '%s' successfully set",
1258 event_name, exclusion_string,
1259 opt_filter);
53a80697 1260 }
9c48cab3 1261 free(exclusion_string);
53a80697 1262 }
6181537c 1263
89476427
JRJ		 1264 if (lttng_opt_mi) {
1265 if (command_ret) {
1266 success = 0;
1267 ev.enabled = 0;
1268 } else {
1269 ev.enabled = 1;
1270 }
1271
970d848b 1272 ret = mi_lttng_event(writer, &ev, 1, handle->domain.type);
89476427
JRJ		 1273 if (ret) {
1274 ret = CMD_ERROR;
1275 goto error;
1276 }
1277
1278 /* print exclusion */
1279 ret = mi_print_exclusion(exclusion_count, exclusion_list);
1280 if (ret) {
1281 ret = CMD_ERROR;
1282 goto error;
1283 }
1284
1285 /* Success ? */
1286 ret = mi_lttng_writer_write_element_bool(writer,
1287 mi_lttng_element_command_success, success);
1288 if (ret) {
1289 ret = CMD_ERROR;
1290 goto end;
1291 }
1292
1293 /* Close event element */
1294 ret = mi_lttng_writer_close_element(writer);
1295 if (ret) {
1296 ret = CMD_ERROR;
1297 goto end;
1298 }
1299 }
1300
f3ed775e
DG		 1301 /* Next event */
1302 event_name = strtok(NULL, ",");
89476427
JRJ		 1303 /* Reset warn, error and success */
1304 success = 1;
f3ed775e
DG		 1305 }
1306
8c9ae521 1307end:
89476427
JRJ		 1308 /* Close Mi */
1309 if (lttng_opt_mi) {
1310 /* Close events element */
1311 ret = mi_lttng_writer_close_element(writer);
1312 if (ret) {
1313 ret = CMD_ERROR;
1314 goto error;
1315 }
1316 }
f3ed775e 1317error:
ae856491
DG		 1318 if (warn) {
1319 ret = CMD_WARNING;
1320 }
89476427
JRJ		 1321 if (error) {
1322 ret = CMD_ERROR;
1323 }
cd80958d
DG		 1324 lttng_destroy_handle(handle);
1325
7ed70bc9
JI		 1326 if (exclusion_list != NULL) {
1327 while (exclusion_count--) {
1328 free(exclusion_list[exclusion_count]);
1329 }
1330 free(exclusion_list);
1331 }
1332
89476427
JRJ		 1333 /* Overwrite ret with error_holder if there was an actual error with
1334 * enabling an event.
1335 */
1336 ret = error_holder ? error_holder : ret;
1337
f3ed775e
DG		 1338 return ret;
1339}
1340
1341/*
6181537c 1342 * Add event to trace session
f3ed775e
DG		 1343 */
1344int cmd_enable_events(int argc, const char **argv)
1345{
89476427 1346 int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
f3ed775e 1347 static poptContext pc;
cd80958d 1348 char *session_name = NULL;
de044b7a 1349 int event_type = -1;
f3ed775e
DG		 1350
1351 pc = poptGetContext(NULL, argc, argv, long_options, 0);
1352 poptReadDefaultConfig(pc, 0);
1353
1354 /* Default event type */
7a3d1328 1355 opt_event_type = LTTNG_EVENT_ALL;
f3ed775e
DG		 1356
1357 while ((opt = poptGetNextOpt(pc)) != -1) {
1358 switch (opt) {
1359 case OPT_HELP:
ca1c3607 1360 usage(stdout);
f3ed775e 1361 goto end;
f3ed775e 1362 case OPT_TRACEPOINT:
e6ddca71 1363 opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e 1364 break;
cf0e5467 1365 case OPT_PROBE:
7d29a247 1366 opt_event_type = LTTNG_EVENT_PROBE;
f3ed775e
DG		 1367 break;
1368 case OPT_FUNCTION:
1369 opt_event_type = LTTNG_EVENT_FUNCTION;
8f0d098b 1370 break;
a54bd42d
MD		 1371 case OPT_SYSCALL:
1372 opt_event_type = LTTNG_EVENT_SYSCALL;
0133c199 1373 break;
eeac7d46
MD		 1374 case OPT_USERSPACE:
1375 opt_userspace = 1;
eeac7d46 1376 break;
0cda4f28 1377 case OPT_LOGLEVEL:
8005f29a 1378 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
0cda4f28
MD		 1379 opt_loglevel = poptGetOptArg(pc);
1380 break;
1381 case OPT_LOGLEVEL_ONLY:
8005f29a 1382 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
0cda4f28 1383 opt_loglevel = poptGetOptArg(pc);
13dce3b7 1384 break;
679b4943
SM		 1385 case OPT_LIST_OPTIONS:
1386 list_cmd_options(stdout, long_options);
679b4943 1387 goto end;
53a80697
MD		 1388 case OPT_FILTER:
1389 break;
fac3366c
JI		 1390 case OPT_EXCLUDE:
1391 break;
f3ed775e
DG		 1392 default:
1393 usage(stderr);
1394 ret = CMD_UNDEFINED;
1395 goto end;
1396 }
de044b7a
DG		 1397
1398 /* Validate event type. Multiple event type are not supported. */
1399 if (event_type == -1) {
1400 event_type = opt_event_type;
1401 } else {
1402 if (event_type != opt_event_type) {
1403 ERR("Multiple event type not supported.");
1404 ret = CMD_ERROR;
1405 goto end;
1406 }
1407 }
f3ed775e
DG		 1408 }
1409
89476427
JRJ		 1410 /* Mi check */
1411 if (lttng_opt_mi) {
1412 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
1413 if (!writer) {
1414 ret = -LTTNG_ERR_NOMEM;
1415 goto end;
1416 }
1417
1418 /* Open command element */
1419 ret = mi_lttng_writer_command_open(writer,
1420 mi_lttng_element_command_enable_event);
1421 if (ret) {
1422 ret = CMD_ERROR;
1423 goto end;
1424 }
1425
1426 /* Open output element */
1427 ret = mi_lttng_writer_open_element(writer,
1428 mi_lttng_element_command_output);
1429 if (ret) {
1430 ret = CMD_ERROR;
1431 goto end;
1432 }
1433 }
1434
f3ed775e
DG		 1435 opt_event_list = (char*) poptGetArg(pc);
1436 if (opt_event_list == NULL && opt_enable_all == 0) {
1437 ERR("Missing event name(s).\n");
1438 usage(stderr);
ca1c3607 1439 ret = CMD_ERROR;
f3ed775e
DG		 1440 goto end;
1441 }
1442
cd80958d
DG		 1443 if (!opt_session_name) {
1444 session_name = get_session_name();
1445 if (session_name == NULL) {
89476427
JRJ		 1446 command_ret = CMD_ERROR;
1447 success = 0;
1448 goto mi_closing;
cd80958d
DG		 1449 }
1450 } else {
1451 session_name = opt_session_name;
1452 }
1453
89476427
JRJ		 1454 command_ret = enable_events(session_name);
1455 if (command_ret) {
1456 success = 0;
1457 goto mi_closing;
1458 }
1459
1460mi_closing:
1461 /* Mi closing */
1462 if (lttng_opt_mi) {
1463 /* Close output element */
1464 ret = mi_lttng_writer_close_element(writer);
1465 if (ret) {
1466 ret = CMD_ERROR;
1467 goto end;
1468 }
1469
1470 ret = mi_lttng_writer_write_element_bool(writer,
1471 mi_lttng_element_command_success, success);
1472 if (ret) {
1473 ret = CMD_ERROR;
1474 goto end;
1475 }
1476
1477 /* Command element close */
1478 ret = mi_lttng_writer_command_close(writer);
1479 if (ret) {
1480 ret = CMD_ERROR;
1481 goto end;
1482 }
1483 }
f3ed775e
DG		 1484
1485end:
89476427
JRJ		 1486 /* Mi clean-up */
1487 if (writer && mi_lttng_writer_destroy(writer)) {
1488 /* Preserve original error code */
1489 ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
1490 }
1491
cd80958d
DG		 1492 if (opt_session_name == NULL) {
1493 free(session_name);
1494 }
1495
89476427
JRJ		 1496 /* Overwrite ret if an error occurred in enable_events */
1497 ret = command_ret ? command_ret : ret;
1498
ca1c3607 1499 poptFreeContext(pc);
f3ed775e
DG		 1500 return ret;
1501}
LTTng tools - Deliverables
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