2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
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.
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.
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.
25 #include <sys/types.h>
30 #include "../command.h"
31 #include <src/common/sessiond-comm/sessiond-comm.h>
33 #if (LTTNG_SYMBOL_NAME_LEN == 256)
34 #define LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "255"
37 static char *opt_event_list
;
38 static int opt_event_type
;
39 static const char *opt_loglevel
;
40 static int opt_loglevel_type
;
41 static int opt_kernel
;
42 static char *opt_session_name
;
43 static int opt_userspace
;
45 static int opt_enable_all
;
46 static char *opt_probe
;
47 static char *opt_function
;
48 static char *opt_function_entry_symbol
;
49 static char *opt_channel_name
;
50 static char *opt_filter
;
51 static char *opt_exclude
;
53 /* Not implemented yet */
54 static char *opt_cmd_name
;
73 static struct lttng_handle
*handle
;
75 static struct poptOption long_options
[] = {
76 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
77 {"help", 'h', POPT_ARG_NONE
, 0, OPT_HELP
, 0, 0},
78 {"session", 's', POPT_ARG_STRING
, &opt_session_name
, 0, 0, 0},
79 {"all", 'a', POPT_ARG_VAL
, &opt_enable_all
, 1, 0, 0},
80 {"channel", 'c', POPT_ARG_STRING
, &opt_channel_name
, 0, 0, 0},
81 {"kernel", 'k', POPT_ARG_VAL
, &opt_kernel
, 1, 0, 0},
82 {"userspace", 'u', POPT_ARG_NONE
, 0, OPT_USERSPACE
, 0, 0},
83 {"jul", 'j', POPT_ARG_VAL
, &opt_jul
, 1, 0, 0},
84 {"tracepoint", 0, POPT_ARG_NONE
, 0, OPT_TRACEPOINT
, 0, 0},
85 {"probe", 0, POPT_ARG_STRING
, &opt_probe
, OPT_PROBE
, 0, 0},
86 {"function", 0, POPT_ARG_STRING
, &opt_function
, OPT_FUNCTION
, 0, 0},
89 * Currently removed from lttng kernel tracer. Removed from
90 * lttng UI to discourage its use.
92 {"function:entry", 0, POPT_ARG_STRING
, &opt_function_entry_symbol
, OPT_FUNCTION_ENTRY
, 0, 0},
94 {"syscall", 0, POPT_ARG_NONE
, 0, OPT_SYSCALL
, 0, 0},
95 {"loglevel", 0, POPT_ARG_STRING
, 0, OPT_LOGLEVEL
, 0, 0},
96 {"loglevel-only", 0, POPT_ARG_STRING
, 0, OPT_LOGLEVEL_ONLY
, 0, 0},
97 {"list-options", 0, POPT_ARG_NONE
, NULL
, OPT_LIST_OPTIONS
, NULL
, NULL
},
98 {"filter", 'f', POPT_ARG_STRING
, &opt_filter
, OPT_FILTER
, 0, 0},
99 {"exclude", 'x', POPT_ARG_STRING
, &opt_exclude
, OPT_EXCLUDE
, 0, 0},
100 {0, 0, 0, 0, 0, 0, 0}
106 static void usage(FILE *ofp
)
108 fprintf(ofp
, "usage: lttng enable-event NAME[,NAME2,...] [-k|-u] [OPTIONS] \n");
110 fprintf(ofp
, "Options:\n");
111 fprintf(ofp
, " -h, --help Show this help\n");
112 fprintf(ofp
, " --list-options Simple listing of options\n");
113 fprintf(ofp
, " -s, --session NAME Apply to session name\n");
114 fprintf(ofp
, " -c, --channel NAME Apply to this channel\n");
115 fprintf(ofp
, " -a, --all Enable all tracepoints and syscalls\n");
116 fprintf(ofp
, " -k, --kernel Apply for the kernel tracer\n");
117 fprintf(ofp
, " -u, --userspace Apply to the user-space tracer\n");
118 fprintf(ofp
, " -j, --jul Apply for Java application using JUL\n");
120 fprintf(ofp
, "Event options:\n");
121 fprintf(ofp
, " --tracepoint Tracepoint event (default)\n");
122 fprintf(ofp
, " - userspace tracer supports wildcards at end of string.\n");
123 fprintf(ofp
, " Don't forget to quote to deal with bash expansion.\n");
124 fprintf(ofp
, " e.g.:\n");
125 fprintf(ofp
, " \"*\"\n");
126 fprintf(ofp
, " \"app_component:na*\"\n");
127 fprintf(ofp
, " --probe (addr | symbol | symbol+offset)\n");
128 fprintf(ofp
, " Dynamic probe.\n");
129 fprintf(ofp
, " Addr and offset can be octal (0NNN...),\n");
130 fprintf(ofp
, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
131 fprintf(ofp
, " --function (addr | symbol | symbol+offset)\n");
132 fprintf(ofp
, " Dynamic function entry/return probe.\n");
133 fprintf(ofp
, " Addr and offset can be octal (0NNN...),\n");
134 fprintf(ofp
, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
136 fprintf(ofp
, " --function:entry symbol\n");
137 fprintf(ofp
, " Function tracer event\n");
139 fprintf(ofp
, " --syscall System call event\n");
141 fprintf(ofp
, " --loglevel name\n");
142 fprintf(ofp
, " Tracepoint loglevel range from 0 to loglevel.\n");
143 fprintf(ofp
, " For JUL domain, see the table below for the range values.\n");
144 fprintf(ofp
, " --loglevel-only name\n");
145 fprintf(ofp
, " Tracepoint loglevel (only this loglevel)\n");
147 fprintf(ofp
, " The loglevel or loglevel-only options should be\n");
148 fprintf(ofp
, " combined with a tracepoint name or tracepoint\n");
149 fprintf(ofp
, " wildcard.\n");
150 fprintf(ofp
, " Available loglevels:\n");
151 fprintf(ofp
, " (higher value is more verbose)\n");
152 fprintf(ofp
, " TRACE_EMERG = 0\n");
153 fprintf(ofp
, " TRACE_ALERT = 1\n");
154 fprintf(ofp
, " TRACE_CRIT = 2\n");
155 fprintf(ofp
, " TRACE_ERR = 3\n");
156 fprintf(ofp
, " TRACE_WARNING = 4\n");
157 fprintf(ofp
, " TRACE_NOTICE = 5\n");
158 fprintf(ofp
, " TRACE_INFO = 6\n");
159 fprintf(ofp
, " TRACE_DEBUG_SYSTEM = 7\n");
160 fprintf(ofp
, " TRACE_DEBUG_PROGRAM = 8\n");
161 fprintf(ofp
, " TRACE_DEBUG_PROCESS = 9\n");
162 fprintf(ofp
, " TRACE_DEBUG_MODULE = 10\n");
163 fprintf(ofp
, " TRACE_DEBUG_UNIT = 11\n");
164 fprintf(ofp
, " TRACE_DEBUG_FUNCTION = 12\n");
165 fprintf(ofp
, " TRACE_DEBUG_LINE = 13\n");
166 fprintf(ofp
, " TRACE_DEBUG = 14\n");
167 fprintf(ofp
, " (shortcuts such as \"system\" are allowed)\n");
169 fprintf(ofp
, " Available JUL domain loglevels:\n");
170 fprintf(ofp
, " JUL_OFF = INT32_MAX\n");
171 fprintf(ofp
, " JUL_SEVERE = %d\n", LTTNG_LOGLEVEL_JUL_SEVERE
);
172 fprintf(ofp
, " JUL_WARNING = %d\n", LTTNG_LOGLEVEL_JUL_WARNING
);
173 fprintf(ofp
, " JUL_INFO = %d\n", LTTNG_LOGLEVEL_JUL_INFO
);
174 fprintf(ofp
, " JUL_CONFIG = %d\n", LTTNG_LOGLEVEL_JUL_CONFIG
);
175 fprintf(ofp
, " JUL_FINE = %d\n", LTTNG_LOGLEVEL_JUL_FINE
);
176 fprintf(ofp
, " JUL_FINER = %d\n", LTTNG_LOGLEVEL_JUL_FINER
);
177 fprintf(ofp
, " JUL_FINEST = %d\n", LTTNG_LOGLEVEL_JUL_FINEST
);
178 fprintf(ofp
, " JUL_ALL = INT32_MIN\n");
179 fprintf(ofp
, " (shortcuts such as \"severe\" are allowed)\n");
181 fprintf(ofp
, " -f, --filter \'expression\'\n");
182 fprintf(ofp
, " Filter expression on event fields and context.\n");
183 fprintf(ofp
, " Event recording depends on evaluation.\n");
184 fprintf(ofp
, " Only specify on first activation of\n");
185 fprintf(ofp
, " a given event within a session.\n");
186 fprintf(ofp
, " Filter only allowed when enabling\n");
187 fprintf(ofp
, " events within a session before tracing\n");
188 fprintf(ofp
, " is started. If the filter fails to link\n");
189 fprintf(ofp
, " with the event within the traced domain,\n");
190 fprintf(ofp
, " the event will be discarded. Currently,\n");
191 fprintf(ofp
, " filter is only implemented for the user-space\n");
192 fprintf(ofp
, " tracer.\n");
193 fprintf(ofp
, " Expression examples:.\n");
195 fprintf(ofp
, " 'intfield > 500 && intfield < 503'\n");
196 fprintf(ofp
, " '(strfield == \"test\" || intfield != 10) && intfield > 33'\n");
197 fprintf(ofp
, " 'doublefield > 1.1 && intfield < 5.3'\n");
199 fprintf(ofp
, " Wildcards are allowed at the end of strings:\n");
200 fprintf(ofp
, " 'seqfield1 == \"te*\"'\n");
201 fprintf(ofp
, " In string literals, the escape character is '\\'.\n");
202 fprintf(ofp
, " Use '\\*' for the '*' character, and '\\\\' for\n");
203 fprintf(ofp
, " the '\\' character. Wildcard match any sequence of,\n");
204 fprintf(ofp
, " characters including an empty sub-string (match 0 or\n");
205 fprintf(ofp
, " more characters).\n");
207 fprintf(ofp
, " Context information can be used for filtering. The\n");
208 fprintf(ofp
, " examples below show usage of context filtering on\n");
209 fprintf(ofp
, " process name (with a wildcard), process ID range, and\n");
210 fprintf(ofp
, " unique thread ID for filtering. The process and\n");
211 fprintf(ofp
, " thread ID of running applications can be found under\n");
212 fprintf(ofp
, " columns \"PID\" and \"LWP\" of the \"ps -eLf\" command.\n");
214 fprintf(ofp
, " '$ctx.procname == \"demo*\"'\n");
215 fprintf(ofp
, " '$ctx.vpid >= 4433 && $ctx.vpid < 4455'\n");
216 fprintf(ofp
, " '$ctx.vtid == 1234'\n");
217 fprintf(ofp
, " -x, --exclude LIST\n");
218 fprintf(ofp
, " Add exclusions to UST tracepoints:\n");
219 fprintf(ofp
, " Events that match any of the items\n");
220 fprintf(ofp
, " in the comma-separated LIST are not\n");
221 fprintf(ofp
, " enabled, even if they match a wildcard\n");
222 fprintf(ofp
, " definition of the event.\n");
227 * Parse probe options.
229 static int parse_probe_opts(struct lttng_event
*ev
, char *opt
)
231 int ret
= CMD_SUCCESS
;
234 #define S_HEX_LEN_SCANF_IS_A_BROKEN_API "18" /* 18 is (19 - 1) (\0 is extra) */
235 char name
[LTTNG_SYMBOL_NAME_LEN
];
242 /* Check for symbol+offset */
243 match
= sscanf(opt
, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API
244 "[^'+']+%" S_HEX_LEN_SCANF_IS_A_BROKEN_API
"s", name
, s_hex
);
246 strncpy(ev
->attr
.probe
.symbol_name
, name
, LTTNG_SYMBOL_NAME_LEN
);
247 ev
->attr
.probe
.symbol_name
[LTTNG_SYMBOL_NAME_LEN
- 1] = '\0';
248 DBG("probe symbol %s", ev
->attr
.probe
.symbol_name
);
249 if (*s_hex
== '\0') {
250 ERR("Invalid probe offset %s", s_hex
);
254 ev
->attr
.probe
.offset
= strtoul(s_hex
, NULL
, 0);
255 DBG("probe offset %" PRIu64
, ev
->attr
.probe
.offset
);
256 ev
->attr
.probe
.addr
= 0;
260 /* Check for symbol */
261 if (isalpha(name
[0])) {
262 match
= sscanf(opt
, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API
"s",
265 strncpy(ev
->attr
.probe
.symbol_name
, name
, LTTNG_SYMBOL_NAME_LEN
);
266 ev
->attr
.probe
.symbol_name
[LTTNG_SYMBOL_NAME_LEN
- 1] = '\0';
267 DBG("probe symbol %s", ev
->attr
.probe
.symbol_name
);
268 ev
->attr
.probe
.offset
= 0;
269 DBG("probe offset %" PRIu64
, ev
->attr
.probe
.offset
);
270 ev
->attr
.probe
.addr
= 0;
275 /* Check for address */
276 match
= sscanf(opt
, "%" S_HEX_LEN_SCANF_IS_A_BROKEN_API
"s", s_hex
);
278 if (*s_hex
== '\0') {
279 ERR("Invalid probe address %s", s_hex
);
283 ev
->attr
.probe
.addr
= strtoul(s_hex
, NULL
, 0);
284 DBG("probe addr %" PRIu64
, ev
->attr
.probe
.addr
);
285 ev
->attr
.probe
.offset
= 0;
286 memset(ev
->attr
.probe
.symbol_name
, 0, LTTNG_SYMBOL_NAME_LEN
);
298 * Maps JUL loglevel from string to value
300 static int loglevel_jul_str_to_value(const char *inputstr
)
303 char str
[LTTNG_SYMBOL_NAME_LEN
];
306 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
307 * added at the end of the loop so a the upper bound we avoid the overflow.
309 while (i
< (LTTNG_SYMBOL_NAME_LEN
- 1) && inputstr
[i
] != '\0') {
310 str
[i
] = toupper(inputstr
[i
]);
315 if (!strcmp(str
, "JUL_OFF") || !strcmp(str
, "OFF")) {
316 return LTTNG_LOGLEVEL_JUL_OFF
;
317 } else if (!strcmp(str
, "JUL_SEVERE") || !strcmp(str
, "SEVERE")) {
318 return LTTNG_LOGLEVEL_JUL_SEVERE
;
319 } else if (!strcmp(str
, "JUL_WARNING") || !strcmp(str
, "WARNING")) {
320 return LTTNG_LOGLEVEL_JUL_WARNING
;
321 } else if (!strcmp(str
, "JUL_INFO") || !strcmp(str
, "INFO")) {
322 return LTTNG_LOGLEVEL_JUL_INFO
;
323 } else if (!strcmp(str
, "JUL_CONFIG") || !strcmp(str
, "CONFIG")) {
324 return LTTNG_LOGLEVEL_JUL_CONFIG
;
325 } else if (!strcmp(str
, "JUL_FINE") || !strcmp(str
, "FINE")) {
326 return LTTNG_LOGLEVEL_JUL_FINE
;
327 } else if (!strcmp(str
, "JUL_FINER") || !strcmp(str
, "FINER")) {
328 return LTTNG_LOGLEVEL_JUL_FINER
;
329 } else if (!strcmp(str
, "JUL_FINEST") || !strcmp(str
, "FINEST")) {
330 return LTTNG_LOGLEVEL_JUL_FINEST
;
331 } else if (!strcmp(str
, "JUL_ALL") || !strcmp(str
, "ALL")) {
332 return LTTNG_LOGLEVEL_JUL_ALL
;
339 * Maps loglevel from string to value
342 int loglevel_str_to_value(const char *inputstr
)
345 char str
[LTTNG_SYMBOL_NAME_LEN
];
348 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
349 * added at the end of the loop so a the upper bound we avoid the overflow.
351 while (i
< (LTTNG_SYMBOL_NAME_LEN
- 1) && inputstr
[i
] != '\0') {
352 str
[i
] = toupper(inputstr
[i
]);
356 if (!strcmp(str
, "TRACE_EMERG") || !strcmp(str
, "EMERG")) {
357 return LTTNG_LOGLEVEL_EMERG
;
358 } else if (!strcmp(str
, "TRACE_ALERT") || !strcmp(str
, "ALERT")) {
359 return LTTNG_LOGLEVEL_ALERT
;
360 } else if (!strcmp(str
, "TRACE_CRIT") || !strcmp(str
, "CRIT")) {
361 return LTTNG_LOGLEVEL_CRIT
;
362 } else if (!strcmp(str
, "TRACE_ERR") || !strcmp(str
, "ERR")) {
363 return LTTNG_LOGLEVEL_ERR
;
364 } else if (!strcmp(str
, "TRACE_WARNING") || !strcmp(str
, "WARNING")) {
365 return LTTNG_LOGLEVEL_WARNING
;
366 } else if (!strcmp(str
, "TRACE_NOTICE") || !strcmp(str
, "NOTICE")) {
367 return LTTNG_LOGLEVEL_NOTICE
;
368 } else if (!strcmp(str
, "TRACE_INFO") || !strcmp(str
, "INFO")) {
369 return LTTNG_LOGLEVEL_INFO
;
370 } else if (!strcmp(str
, "TRACE_DEBUG_SYSTEM") || !strcmp(str
, "DEBUG_SYSTEM") || !strcmp(str
, "SYSTEM")) {
371 return LTTNG_LOGLEVEL_DEBUG_SYSTEM
;
372 } else if (!strcmp(str
, "TRACE_DEBUG_PROGRAM") || !strcmp(str
, "DEBUG_PROGRAM") || !strcmp(str
, "PROGRAM")) {
373 return LTTNG_LOGLEVEL_DEBUG_PROGRAM
;
374 } else if (!strcmp(str
, "TRACE_DEBUG_PROCESS") || !strcmp(str
, "DEBUG_PROCESS") || !strcmp(str
, "PROCESS")) {
375 return LTTNG_LOGLEVEL_DEBUG_PROCESS
;
376 } else if (!strcmp(str
, "TRACE_DEBUG_MODULE") || !strcmp(str
, "DEBUG_MODULE") || !strcmp(str
, "MODULE")) {
377 return LTTNG_LOGLEVEL_DEBUG_MODULE
;
378 } else if (!strcmp(str
, "TRACE_DEBUG_UNIT") || !strcmp(str
, "DEBUG_UNIT") || !strcmp(str
, "UNIT")) {
379 return LTTNG_LOGLEVEL_DEBUG_UNIT
;
380 } else if (!strcmp(str
, "TRACE_DEBUG_FUNCTION") || !strcmp(str
, "DEBUG_FUNCTION") || !strcmp(str
, "FUNCTION")) {
381 return LTTNG_LOGLEVEL_DEBUG_FUNCTION
;
382 } else if (!strcmp(str
, "TRACE_DEBUG_LINE") || !strcmp(str
, "DEBUG_LINE") || !strcmp(str
, "LINE")) {
383 return LTTNG_LOGLEVEL_DEBUG_LINE
;
384 } else if (!strcmp(str
, "TRACE_DEBUG") || !strcmp(str
, "DEBUG")) {
385 return LTTNG_LOGLEVEL_DEBUG
;
392 const char *print_channel_name(const char *name
)
394 return name
? : DEFAULT_CHANNEL_NAME
;
398 const char *print_raw_channel_name(const char *name
)
400 return name
? : "<default>";
404 * Return allocated string for pretty-printing exclusion names.
407 char *print_exclusions(int count
, char **names
)
411 const char *preamble
= " excluding ";
418 /* calculate total required length */
419 for (i
= 0; i
< count
; i
++) {
420 length
+= strlen(names
[i
]) + 1;
423 /* add length of preamble + one for NUL - one for last (missing) comma */
424 length
+= strlen(preamble
);
425 ret
= zmalloc(length
);
429 strncpy(ret
, preamble
, length
);
430 for (i
= 0; i
< count
; i
++) {
431 strcat(ret
, names
[i
]);
432 if (i
!= count
- 1) {
440 * Compare list of exclusions against an event name.
441 * Return a list of legal exclusion names.
442 * Produce an error or a warning about others (depending on the situation)
445 int check_exclusion_subsets(const char *event_name
,
446 const char *exclusions
,
447 int *exclusion_count_ptr
,
448 char ***exclusion_list_ptr
)
450 const char *excluder_ptr
;
451 const char *event_ptr
;
452 const char *next_excluder
;
454 int exclusion_count
= 0;
455 char **exclusion_list
= NULL
;
456 int ret
= CMD_SUCCESS
;
458 if (event_name
[strlen(event_name
) - 1] != '*') {
459 ERR("Event %s: Excluders can only be used with wildcarded events", event_name
);
463 next_excluder
= exclusions
;
464 while (*next_excluder
!= 0) {
465 event_ptr
= event_name
;
466 excluder_ptr
= next_excluder
;
467 excluder_length
= strcspn(next_excluder
, ",");
469 /* Scan both the excluder and the event letter by letter */
477 /* Event is a subset of the excluder */
478 ERR("Event %s: %.*s excludes all events from %s",
486 /* Excluder is a proper subset of event */
488 exclusion_list
= realloc(exclusion_list
, sizeof(char **) * exclusion_count
);
489 exclusion_list
[exclusion_count
- 1] = strndup(next_excluder
, excluder_length
);
494 /* Excluder and event sets have no common elements */
495 WARN("Event %s: %.*s does not exclude any events from %s",
506 next_excluder
+= excluder_length
;
507 if (*next_excluder
== ',') {
513 while (exclusion_count
--) {
514 free(exclusion_list
[exclusion_count
]);
516 if (exclusion_list
!= NULL
) {
517 free(exclusion_list
);
519 exclusion_list
= NULL
;
523 *exclusion_count_ptr
= exclusion_count
;
524 *exclusion_list_ptr
= exclusion_list
;
528 * Enabling event using the lttng API.
530 static int enable_events(char *session_name
)
532 int ret
= CMD_SUCCESS
, warn
= 0;
533 char *event_name
, *channel_name
= NULL
;
534 struct lttng_event ev
;
535 struct lttng_domain dom
;
536 int exclusion_count
= 0;
537 char **exclusion_list
= NULL
;
539 memset(&ev
, 0, sizeof(ev
));
540 memset(&dom
, 0, sizeof(dom
));
544 ERR("Filter not implement for kernel tracing yet");
549 WARN("Kernel loglevels are not supported.");
553 /* Create lttng domain */
555 dom
.type
= LTTNG_DOMAIN_KERNEL
;
556 dom
.buf_type
= LTTNG_BUFFER_GLOBAL
;
557 } else if (opt_userspace
) {
558 dom
.type
= LTTNG_DOMAIN_UST
;
560 dom
.buf_type
= LTTNG_BUFFER_PER_UID
;
561 } else if (opt_jul
) {
562 dom
.type
= LTTNG_DOMAIN_JUL
;
564 dom
.buf_type
= LTTNG_BUFFER_PER_UID
;
566 print_missing_domain();
571 if (opt_kernel
&& opt_exclude
) {
572 ERR("Event name exclusions are not yet implemented for kernel events");
577 channel_name
= opt_channel_name
;
579 handle
= lttng_create_handle(session_name
, &dom
);
580 if (handle
== NULL
) {
585 if (opt_enable_all
) {
586 /* Default setup for enable all */
588 ev
.type
= opt_event_type
;
590 /* kernel loglevels not implemented */
591 ev
.loglevel_type
= LTTNG_EVENT_LOGLEVEL_ALL
;
593 ev
.type
= LTTNG_EVENT_TRACEPOINT
;
594 strcpy(ev
.name
, "*");
595 ev
.loglevel_type
= opt_loglevel_type
;
597 assert(opt_userspace
|| opt_jul
);
599 ev
.loglevel
= loglevel_str_to_value(opt_loglevel
);
600 } else if (opt_jul
) {
601 ev
.loglevel
= loglevel_jul_str_to_value(opt_loglevel
);
603 if (ev
.loglevel
== -1) {
604 ERR("Unknown loglevel %s", opt_loglevel
);
605 ret
= -LTTNG_ERR_INVALID
;
609 assert(opt_userspace
|| opt_jul
);
612 } else if (opt_jul
) {
613 ev
.loglevel
= LTTNG_LOGLEVEL_JUL_ALL
;
619 ret
= check_exclusion_subsets("*", opt_exclude
,
620 &exclusion_count
, &exclusion_list
);
621 if (ret
== CMD_ERROR
) {
626 ret
= lttng_enable_event_with_exclusions(handle
,
629 exclusion_count
, exclusion_list
);
632 case LTTNG_ERR_KERN_EVENT_EXIST
:
633 WARN("Kernel events already enabled (channel %s, session %s)",
634 print_channel_name(channel_name
), session_name
);
636 case LTTNG_ERR_TRACE_ALREADY_STARTED
:
638 const char *msg
= "The command tried to enable an event in a new domain for a session that has already been started once.";
639 ERR("Events: %s (channel %s, session %s)",
641 print_channel_name(channel_name
),
647 ERR("Events: %s (channel %s, session %s)",
649 ret
== -LTTNG_ERR_NEED_CHANNEL_NAME
650 ? print_raw_channel_name(channel_name
)
651 : print_channel_name(channel_name
),
658 switch (opt_event_type
) {
659 case LTTNG_EVENT_TRACEPOINT
:
660 if (opt_loglevel
&& dom
.type
!= LTTNG_DOMAIN_KERNEL
) {
661 char *exclusion_string
= print_exclusions(exclusion_count
, exclusion_list
);
662 MSG("All %s tracepoints%s are enabled in channel %s for loglevel %s",
663 get_domain_str(dom
.type
),
665 print_channel_name(channel_name
),
667 free(exclusion_string
);
669 char *exclusion_string
= print_exclusions(exclusion_count
, exclusion_list
);
670 MSG("All %s tracepoints%s are enabled in channel %s",
671 get_domain_str(dom
.type
),
673 print_channel_name(channel_name
));
674 free(exclusion_string
);
677 case LTTNG_EVENT_SYSCALL
:
679 MSG("All kernel system calls are enabled in channel %s",
680 print_channel_name(channel_name
));
683 case LTTNG_EVENT_ALL
:
684 if (opt_loglevel
&& dom
.type
!= LTTNG_DOMAIN_KERNEL
) {
685 char *exclusion_string
= print_exclusions(exclusion_count
, exclusion_list
);
686 MSG("All %s events%s are enabled in channel %s for loglevel %s",
687 get_domain_str(dom
.type
),
689 print_channel_name(channel_name
),
691 free(exclusion_string
);
693 char *exclusion_string
= print_exclusions(exclusion_count
, exclusion_list
);
694 MSG("All %s events%s are enabled in channel %s",
695 get_domain_str(dom
.type
),
697 print_channel_name(channel_name
));
698 free(exclusion_string
);
703 * We should not be here since lttng_enable_event should have
704 * failed on the event type.
710 ret
= lttng_enable_event_with_exclusions(handle
, &ev
, channel_name
,
711 opt_filter
, exclusion_count
, exclusion_list
);
714 case LTTNG_ERR_FILTER_EXIST
:
715 WARN("Filter on all events is already enabled"
716 " (channel %s, session %s)",
717 print_channel_name(channel_name
), session_name
);
719 case LTTNG_ERR_TRACE_ALREADY_STARTED
:
721 const char *msg
= "The command tried to enable an event in a new domain for a session that has already been started once.";
722 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
724 print_channel_name(channel_name
),
725 session_name
, opt_filter
);
730 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
732 ret
== -LTTNG_ERR_NEED_CHANNEL_NAME
733 ? print_raw_channel_name(channel_name
)
734 : print_channel_name(channel_name
),
735 session_name
, opt_filter
);
740 MSG("Filter '%s' successfully set", opt_filter
);
746 /* Strip event list */
747 event_name
= strtok(opt_event_list
, ",");
748 while (event_name
!= NULL
) {
749 /* Copy name and type of the event */
750 strncpy(ev
.name
, event_name
, LTTNG_SYMBOL_NAME_LEN
);
751 ev
.name
[LTTNG_SYMBOL_NAME_LEN
- 1] = '\0';
752 ev
.type
= opt_event_type
;
754 /* Kernel tracer action */
756 DBG("Enabling kernel event %s for channel %s",
758 print_channel_name(channel_name
));
760 switch (opt_event_type
) {
761 case LTTNG_EVENT_ALL
: /* Default behavior is tracepoint */
762 ev
.type
= LTTNG_EVENT_TRACEPOINT
;
764 case LTTNG_EVENT_TRACEPOINT
:
766 case LTTNG_EVENT_PROBE
:
767 ret
= parse_probe_opts(&ev
, opt_probe
);
769 ERR("Unable to parse probe options");
774 case LTTNG_EVENT_FUNCTION
:
775 ret
= parse_probe_opts(&ev
, opt_function
);
777 ERR("Unable to parse function probe options");
782 case LTTNG_EVENT_FUNCTION_ENTRY
:
783 strncpy(ev
.attr
.ftrace
.symbol_name
, opt_function_entry_symbol
,
784 LTTNG_SYMBOL_NAME_LEN
);
785 ev
.attr
.ftrace
.symbol_name
[LTTNG_SYMBOL_NAME_LEN
- 1] = '\0';
787 case LTTNG_EVENT_SYSCALL
:
788 MSG("per-syscall selection not supported yet. Use \"-a\" "
789 "for all syscalls.");
795 /* kernel loglevels not implemented */
796 ev
.loglevel_type
= LTTNG_EVENT_LOGLEVEL_ALL
;
797 } else if (opt_userspace
) { /* User-space tracer action */
799 if (opt_cmd_name
!= NULL
|| opt_pid
) {
800 MSG("Only supporting tracing all UST processes (-u) for now.");
806 DBG("Enabling UST event %s for channel %s, loglevel %s", event_name
,
807 print_channel_name(channel_name
), opt_loglevel
? : "<all>");
809 switch (opt_event_type
) {
810 case LTTNG_EVENT_ALL
: /* Default behavior is tracepoint */
812 case LTTNG_EVENT_TRACEPOINT
:
813 /* Copy name and type of the event */
814 ev
.type
= LTTNG_EVENT_TRACEPOINT
;
815 strncpy(ev
.name
, event_name
, LTTNG_SYMBOL_NAME_LEN
);
816 ev
.name
[LTTNG_SYMBOL_NAME_LEN
- 1] = '\0';
818 case LTTNG_EVENT_PROBE
:
819 case LTTNG_EVENT_FUNCTION
:
820 case LTTNG_EVENT_FUNCTION_ENTRY
:
821 case LTTNG_EVENT_SYSCALL
:
823 ERR("Event type not available for user-space tracing");
824 ret
= CMD_UNSUPPORTED
;
829 if (opt_event_type
!= LTTNG_EVENT_ALL
&& opt_event_type
!= LTTNG_EVENT_TRACEPOINT
) {
830 ERR("Exclusion option can only be used with tracepoint events");
834 /* Free previously allocated items */
835 if (exclusion_list
!= NULL
) {
836 while (exclusion_count
--) {
837 free(exclusion_list
[exclusion_count
]);
839 free(exclusion_list
);
840 exclusion_list
= NULL
;
842 /* Check for proper subsets */
843 ret
= check_exclusion_subsets(event_name
, opt_exclude
,
844 &exclusion_count
, &exclusion_list
);
845 if (ret
== CMD_ERROR
) {
850 ev
.loglevel_type
= opt_loglevel_type
;
852 ev
.loglevel
= loglevel_str_to_value(opt_loglevel
);
853 if (ev
.loglevel
== -1) {
854 ERR("Unknown loglevel %s", opt_loglevel
);
855 ret
= -LTTNG_ERR_INVALID
;
861 } else if (opt_jul
) {
862 if (opt_event_type
!= LTTNG_EVENT_ALL
&&
863 opt_event_type
!= LTTNG_EVENT_TRACEPOINT
) {
864 ERR("Event type not supported for JUL domain.");
865 ret
= CMD_UNSUPPORTED
;
869 ev
.loglevel_type
= opt_loglevel_type
;
871 ev
.loglevel
= loglevel_jul_str_to_value(opt_loglevel
);
872 if (ev
.loglevel
== -1) {
873 ERR("Unknown loglevel %s", opt_loglevel
);
874 ret
= -LTTNG_ERR_INVALID
;
878 ev
.loglevel
= LTTNG_LOGLEVEL_JUL_ALL
;
880 ev
.type
= LTTNG_EVENT_TRACEPOINT
;
881 strncpy(ev
.name
, event_name
, LTTNG_SYMBOL_NAME_LEN
);
882 ev
.name
[LTTNG_SYMBOL_NAME_LEN
- 1] = '\0';
884 print_missing_domain();
890 char *exclusion_string
;
892 ret
= lttng_enable_event_with_exclusions(handle
,
894 NULL
, exclusion_count
, exclusion_list
);
895 exclusion_string
= print_exclusions(exclusion_count
, exclusion_list
);
897 /* Turn ret to positive value to handle the positive error code */
899 case LTTNG_ERR_KERN_EVENT_EXIST
:
900 WARN("Kernel event %s%s already enabled (channel %s, session %s)",
903 print_channel_name(channel_name
), session_name
);
906 case LTTNG_ERR_TRACE_ALREADY_STARTED
:
908 const char *msg
= "The command tried to enable an event in a new domain for a session that has already been started once.";
909 ERR("Event %s%s: %s (channel %s, session %s)", event_name
,
912 print_channel_name(channel_name
),
918 ERR("Event %s%s: %s (channel %s, session %s)", event_name
,
921 ret
== -LTTNG_ERR_NEED_CHANNEL_NAME
922 ? print_raw_channel_name(channel_name
)
923 : print_channel_name(channel_name
),
929 MSG("%s event %s%s created in channel %s",
930 get_domain_str(dom
.type
), event_name
,
932 print_channel_name(channel_name
));
934 free(exclusion_string
);
938 char *exclusion_string
;
940 ret
= lttng_enable_event_with_exclusions(handle
, &ev
, channel_name
,
941 opt_filter
, exclusion_count
, exclusion_list
);
942 exclusion_string
= print_exclusions(exclusion_count
, exclusion_list
);
946 case LTTNG_ERR_FILTER_EXIST
:
947 WARN("Filter on event %s%s is already enabled"
948 " (channel %s, session %s)",
951 print_channel_name(channel_name
), session_name
);
953 case LTTNG_ERR_TRACE_ALREADY_STARTED
:
955 const char *msg
= "The command tried to enable an event in a new domain for a session that has already been started once.";
956 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev
.name
,
959 print_channel_name(channel_name
),
960 session_name
, opt_filter
);
965 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev
.name
,
968 ret
== -LTTNG_ERR_NEED_CHANNEL_NAME
969 ? print_raw_channel_name(channel_name
)
970 : print_channel_name(channel_name
),
971 session_name
, opt_filter
);
974 free(exclusion_string
);
977 MSG("Event %s%s: Filter '%s' successfully set",
978 event_name
, exclusion_string
,
981 free(exclusion_string
);
985 event_name
= strtok(NULL
, ",");
993 lttng_destroy_handle(handle
);
995 if (exclusion_list
!= NULL
) {
996 while (exclusion_count
--) {
997 free(exclusion_list
[exclusion_count
]);
999 free(exclusion_list
);
1006 * Add event to trace session
1008 int cmd_enable_events(int argc
, const char **argv
)
1010 int opt
, ret
= CMD_SUCCESS
;
1011 static poptContext pc
;
1012 char *session_name
= NULL
;
1013 int event_type
= -1;
1015 pc
= poptGetContext(NULL
, argc
, argv
, long_options
, 0);
1016 poptReadDefaultConfig(pc
, 0);
1018 /* Default event type */
1019 opt_event_type
= LTTNG_EVENT_ALL
;
1021 while ((opt
= poptGetNextOpt(pc
)) != -1) {
1026 case OPT_TRACEPOINT
:
1027 opt_event_type
= LTTNG_EVENT_TRACEPOINT
;
1030 opt_event_type
= LTTNG_EVENT_PROBE
;
1033 opt_event_type
= LTTNG_EVENT_FUNCTION
;
1035 case OPT_FUNCTION_ENTRY
:
1036 opt_event_type
= LTTNG_EVENT_FUNCTION_ENTRY
;
1039 opt_event_type
= LTTNG_EVENT_SYSCALL
;
1045 opt_loglevel_type
= LTTNG_EVENT_LOGLEVEL_RANGE
;
1046 opt_loglevel
= poptGetOptArg(pc
);
1048 case OPT_LOGLEVEL_ONLY
:
1049 opt_loglevel_type
= LTTNG_EVENT_LOGLEVEL_SINGLE
;
1050 opt_loglevel
= poptGetOptArg(pc
);
1052 case OPT_LIST_OPTIONS
:
1053 list_cmd_options(stdout
, long_options
);
1061 ret
= CMD_UNDEFINED
;
1065 /* Validate event type. Multiple event type are not supported. */
1066 if (event_type
== -1) {
1067 event_type
= opt_event_type
;
1069 if (event_type
!= opt_event_type
) {
1070 ERR("Multiple event type not supported.");
1077 opt_event_list
= (char*) poptGetArg(pc
);
1078 if (opt_event_list
== NULL
&& opt_enable_all
== 0) {
1079 ERR("Missing event name(s).\n");
1085 if (!opt_session_name
) {
1086 session_name
= get_session_name();
1087 if (session_name
== NULL
) {
1092 session_name
= opt_session_name
;
1095 ret
= enable_events(session_name
);
1098 if (opt_session_name
== NULL
) {
1102 poptFreeContext(pc
);