2 * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
4 * SPDX-License-Identifier: GPL-2.0-only
14 #include <sys/types.h>
19 #include <common/sessiond-comm/sessiond-comm.h>
20 #include <common/compat/string.h>
21 #include <common/compat/getenv.h>
22 #include <common/string-utils/string-utils.h>
23 #include <common/utils.h>
26 #include <common/mi-lttng.h>
28 #include <lttng/event-internal.h>
30 #include "../command.h"
31 #include "../loglevel.h"
32 #include "../uprobe.h"
34 #if (LTTNG_SYMBOL_NAME_LEN == 256)
35 #define LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "255"
38 static char *opt_event_list
;
39 static int opt_event_type
;
40 static const char *opt_loglevel
;
41 static int opt_loglevel_type
;
42 static int opt_kernel
;
43 static char *opt_session_name
;
44 static int opt_userspace
;
47 static int opt_python
;
48 static int opt_enable_all
;
49 static char *opt_probe
;
50 static char *opt_userspace_probe
;
51 static char *opt_function
;
52 static char *opt_channel_name
;
53 static char *opt_filter
;
54 static char *opt_exclude
;
56 #ifdef LTTNG_EMBED_HELP
57 static const char help_msg
[] =
58 #include <lttng-enable-event.1.h>
77 static struct lttng_handle
*handle
;
78 static struct mi_writer
*writer
;
80 static struct poptOption long_options
[] = {
81 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
82 {"help", 'h', POPT_ARG_NONE
, 0, OPT_HELP
, 0, 0},
83 {"session", 's', POPT_ARG_STRING
, &opt_session_name
, 0, 0, 0},
84 {"all", 'a', POPT_ARG_VAL
, &opt_enable_all
, 1, 0, 0},
85 {"channel", 'c', POPT_ARG_STRING
, &opt_channel_name
, 0, 0, 0},
86 {"kernel", 'k', POPT_ARG_VAL
, &opt_kernel
, 1, 0, 0},
87 {"userspace", 'u', POPT_ARG_NONE
, 0, OPT_USERSPACE
, 0, 0},
88 {"jul", 'j', POPT_ARG_VAL
, &opt_jul
, 1, 0, 0},
89 {"log4j", 'l', POPT_ARG_VAL
, &opt_log4j
, 1, 0, 0},
90 {"python", 'p', POPT_ARG_VAL
, &opt_python
, 1, 0, 0},
91 {"tracepoint", 0, POPT_ARG_NONE
, 0, OPT_TRACEPOINT
, 0, 0},
92 {"probe", 0, POPT_ARG_STRING
, &opt_probe
, OPT_PROBE
, 0, 0},
93 {"userspace-probe",0, POPT_ARG_STRING
, &opt_userspace_probe
, OPT_USERSPACE_PROBE
, 0, 0},
94 {"function", 0, POPT_ARG_STRING
, &opt_function
, OPT_FUNCTION
, 0, 0},
95 {"syscall", 0, POPT_ARG_NONE
, 0, OPT_SYSCALL
, 0, 0},
96 {"loglevel", 0, POPT_ARG_STRING
, 0, OPT_LOGLEVEL
, 0, 0},
97 {"loglevel-only", 0, POPT_ARG_STRING
, 0, OPT_LOGLEVEL_ONLY
, 0, 0},
98 {"list-options", 0, POPT_ARG_NONE
, NULL
, OPT_LIST_OPTIONS
, NULL
, NULL
},
99 {"filter", 'f', POPT_ARG_STRING
, &opt_filter
, OPT_FILTER
, 0, 0},
100 {"exclude", 'x', POPT_ARG_STRING
, &opt_exclude
, OPT_EXCLUDE
, 0, 0},
101 {0, 0, 0, 0, 0, 0, 0}
105 * Parse probe options.
107 static int parse_probe_opts(struct lttng_event
*ev
, char *opt
)
109 int ret
= CMD_SUCCESS
;
112 #define S_HEX_LEN_SCANF_IS_A_BROKEN_API "18" /* 18 is (19 - 1) (\0 is extra) */
113 char name
[LTTNG_SYMBOL_NAME_LEN
];
120 /* Check for symbol+offset */
121 match
= sscanf(opt
, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API
122 "[^'+']+%" S_HEX_LEN_SCANF_IS_A_BROKEN_API
"s", name
, s_hex
);
124 strncpy(ev
->attr
.probe
.symbol_name
, name
, LTTNG_SYMBOL_NAME_LEN
);
125 ev
->attr
.probe
.symbol_name
[LTTNG_SYMBOL_NAME_LEN
- 1] = '\0';
126 DBG("probe symbol %s", ev
->attr
.probe
.symbol_name
);
127 if (*s_hex
== '\0') {
128 ERR("Invalid probe offset %s", s_hex
);
132 ev
->attr
.probe
.offset
= strtoul(s_hex
, NULL
, 0);
133 DBG("probe offset %" PRIu64
, ev
->attr
.probe
.offset
);
134 ev
->attr
.probe
.addr
= 0;
138 /* Check for symbol */
139 if (isalpha(name
[0]) || name
[0] == '_') {
140 match
= sscanf(opt
, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API
"s",
143 strncpy(ev
->attr
.probe
.symbol_name
, name
, LTTNG_SYMBOL_NAME_LEN
);
144 ev
->attr
.probe
.symbol_name
[LTTNG_SYMBOL_NAME_LEN
- 1] = '\0';
145 DBG("probe symbol %s", ev
->attr
.probe
.symbol_name
);
146 ev
->attr
.probe
.offset
= 0;
147 DBG("probe offset %" PRIu64
, ev
->attr
.probe
.offset
);
148 ev
->attr
.probe
.addr
= 0;
153 /* Check for address */
154 match
= sscanf(opt
, "%" S_HEX_LEN_SCANF_IS_A_BROKEN_API
"s", s_hex
);
157 * Return an error if the first character of the tentative
158 * address is NULL or not a digit. It can be "0" if the address
159 * is in hexadecimal and can be 1 to 9 if it's in decimal.
161 if (*s_hex
== '\0' || !isdigit(*s_hex
)) {
162 ERR("Invalid probe description %s", s_hex
);
166 ev
->attr
.probe
.addr
= strtoul(s_hex
, NULL
, 0);
167 DBG("probe addr %" PRIu64
, ev
->attr
.probe
.addr
);
168 ev
->attr
.probe
.offset
= 0;
169 memset(ev
->attr
.probe
.symbol_name
, 0, LTTNG_SYMBOL_NAME_LEN
);
181 const char *print_channel_name(const char *name
)
183 return name
? : DEFAULT_CHANNEL_NAME
;
187 const char *print_raw_channel_name(const char *name
)
189 return name
? : "<default>";
193 * Mi print exlcusion list
196 int mi_print_exclusion(char **names
)
199 int count
= names
? strutils_array_of_strings_len(names
) : 0;
207 ret
= mi_lttng_writer_open_element(writer
, config_element_exclusions
);
212 for (i
= 0; i
< count
; i
++) {
213 ret
= mi_lttng_writer_write_element_string(writer
,
214 config_element_exclusion
, names
[i
]);
220 /* Close exclusions element */
221 ret
= mi_lttng_writer_close_element(writer
);
228 * Return allocated string for pretty-printing exclusion names.
231 char *print_exclusions(char **names
)
235 const char preamble
[] = " excluding ";
237 int count
= names
? strutils_array_of_strings_len(names
) : 0;
243 /* calculate total required length */
244 for (i
= 0; i
< count
; i
++) {
245 length
+= strlen(names
[i
]) + 4;
248 length
+= sizeof(preamble
);
249 ret
= zmalloc(length
);
253 strncpy(ret
, preamble
, length
);
254 for (i
= 0; i
< count
; i
++) {
256 strcat(ret
, names
[i
]);
258 if (i
!= count
- 1) {
267 int check_exclusion_subsets(const char *event_name
, const char *exclusion
)
271 const char *e
= event_name
;
272 const char *x
= exclusion
;
274 /* Scan both the excluder and the event letter by letter */
288 /* Event is a subset of the excluder */
289 ERR("Event %s: %s excludes all events from %s",
290 event_name
, exclusion
, event_name
);
296 * Reached the end of the event name before the
297 * end of the exclusion: this is valid.
319 WARN("Event %s: %s does not exclude any events from %s",
320 event_name
, exclusion
, event_name
);
327 * FIXME: find a good place to declare this since add trigger also uses it
330 int validate_exclusion_list(
331 const char *event_name
, const char *const *exclusions
);
334 int validate_exclusion_list(
335 const char *event_name
, const char *const *exclusions
)
339 /* Event name must be a valid globbing pattern to allow exclusions. */
340 if (!strutils_is_star_glob_pattern(event_name
)) {
341 ERR("Event %s: Exclusions can only be used with a globbing pattern",
347 * If the event name is a star-at-end only globbing pattern,
348 * then we can validate the individual exclusions. Otherwise
349 * all exclusions are passed to the session daemon.
351 if (strutils_is_star_at_the_end_only_glob_pattern(event_name
)) {
352 const char *const *exclusion
;
354 for (exclusion
= exclusions
; *exclusion
; exclusion
++) {
355 if (!strutils_is_star_glob_pattern(*exclusion
) ||
356 strutils_is_star_at_the_end_only_glob_pattern(*exclusion
)) {
357 ret
= check_exclusion_subsets(event_name
, *exclusion
);
375 static int create_exclusion_list_and_validate(const char *event_name
,
376 const char *exclusions_arg
,
377 char ***exclusion_list
)
380 char **exclusions
= NULL
;
382 /* Split exclusions. */
383 exclusions
= strutils_split(exclusions_arg
, ',', true);
388 if (validate_exclusion_list(event_name
, (const char **) exclusions
) !=
393 *exclusion_list
= exclusions
;
399 strutils_free_null_terminated_array_of_strings(exclusions
);
405 static void warn_on_truncated_exclusion_names(char * const *exclusion_list
,
408 char * const *exclusion
;
410 for (exclusion
= exclusion_list
; *exclusion
; exclusion
++) {
411 if (strlen(*exclusion
) >= LTTNG_SYMBOL_NAME_LEN
) {
412 WARN("Event exclusion \"%s\" will be truncated",
420 * Enabling event using the lttng API.
421 * Note: in case of error only the last error code will be return.
423 static int enable_events(char *session_name
)
425 int ret
= CMD_SUCCESS
, command_ret
= CMD_SUCCESS
;
426 int error_holder
= CMD_SUCCESS
, warn
= 0, error
= 0, success
= 1;
427 char *event_name
, *channel_name
= NULL
;
428 struct lttng_event
*ev
;
429 struct lttng_domain dom
;
430 char **exclusion_list
= NULL
;
431 struct lttng_userspace_probe_location
*uprobe_loc
= NULL
;
433 memset(&dom
, 0, sizeof(dom
));
435 ev
= lttng_event_create();
443 WARN("Kernel loglevels are not supported.");
447 /* Create lttng domain */
449 dom
.type
= LTTNG_DOMAIN_KERNEL
;
450 dom
.buf_type
= LTTNG_BUFFER_GLOBAL
;
451 } else if (opt_userspace
) {
452 dom
.type
= LTTNG_DOMAIN_UST
;
454 dom
.buf_type
= LTTNG_BUFFER_PER_UID
;
455 } else if (opt_jul
) {
456 dom
.type
= LTTNG_DOMAIN_JUL
;
458 dom
.buf_type
= LTTNG_BUFFER_PER_UID
;
459 } else if (opt_log4j
) {
460 dom
.type
= LTTNG_DOMAIN_LOG4J
;
462 dom
.buf_type
= LTTNG_BUFFER_PER_UID
;
463 } else if (opt_python
) {
464 dom
.type
= LTTNG_DOMAIN_PYTHON
;
466 dom
.buf_type
= LTTNG_BUFFER_PER_UID
;
468 /* Checked by the caller. */
474 case LTTNG_DOMAIN_KERNEL
:
475 case LTTNG_DOMAIN_JUL
:
476 case LTTNG_DOMAIN_LOG4J
:
477 case LTTNG_DOMAIN_PYTHON
:
478 ERR("Event name exclusions are not yet implemented for %s events",
479 get_domain_str(dom
.type
));
482 case LTTNG_DOMAIN_UST
:
483 /* Exclusions supported */
491 * Adding a filter to a probe, function or userspace-probe would be
492 * denied by the kernel tracer as it's not supported at the moment. We
493 * do an early check here to warn the user.
495 if (opt_filter
&& opt_kernel
) {
496 switch (opt_event_type
) {
497 case LTTNG_EVENT_ALL
:
498 case LTTNG_EVENT_TRACEPOINT
:
499 case LTTNG_EVENT_SYSCALL
:
501 case LTTNG_EVENT_PROBE
:
502 case LTTNG_EVENT_USERSPACE_PROBE
:
503 case LTTNG_EVENT_FUNCTION
:
504 ERR("Filter expressions are not supported for %s events",
505 get_event_type_str(opt_event_type
));
514 channel_name
= opt_channel_name
;
516 handle
= lttng_create_handle(session_name
, &dom
);
517 if (handle
== NULL
) {
524 /* Open a events element */
525 ret
= mi_lttng_writer_open_element(writer
, config_element_events
);
532 if (opt_enable_all
) {
533 /* Default setup for enable all */
535 ev
->type
= opt_event_type
;
536 strcpy(ev
->name
, "*");
537 /* kernel loglevels not implemented */
538 ev
->loglevel_type
= LTTNG_EVENT_LOGLEVEL_ALL
;
540 ev
->type
= LTTNG_EVENT_TRACEPOINT
;
541 strcpy(ev
->name
, "*");
542 ev
->loglevel_type
= opt_loglevel_type
;
546 assert(opt_userspace
|| opt_jul
|| opt_log4j
|| opt_python
);
549 enum lttng_loglevel loglevel
;
551 name_search_ret
= loglevel_name_to_value(opt_loglevel
, &loglevel
);
552 ev
->loglevel
= (int) loglevel
;
553 } else if (opt_jul
) {
554 enum lttng_loglevel_jul loglevel
;
556 name_search_ret
= loglevel_jul_name_to_value(opt_loglevel
, &loglevel
);
557 ev
->loglevel
= (int) loglevel
;
558 } else if (opt_log4j
) {
559 enum lttng_loglevel_log4j loglevel
;
561 name_search_ret
= loglevel_log4j_name_to_value(opt_loglevel
, &loglevel
);
562 ev
->loglevel
= (int) loglevel
;
565 enum lttng_loglevel_python loglevel
;
567 name_search_ret
= loglevel_python_name_to_value(opt_loglevel
, &loglevel
);
568 ev
->loglevel
= (int) loglevel
;
571 if (name_search_ret
== -1) {
572 ERR("Unknown loglevel %s", opt_loglevel
);
573 ret
= -LTTNG_ERR_INVALID
;
577 assert(opt_userspace
|| opt_jul
|| opt_log4j
|| opt_python
);
580 } else if (opt_jul
) {
581 ev
->loglevel
= LTTNG_LOGLEVEL_JUL_ALL
;
582 } else if (opt_log4j
) {
583 ev
->loglevel
= LTTNG_LOGLEVEL_LOG4J_ALL
;
584 } else if (opt_python
) {
585 ev
->loglevel
= LTTNG_LOGLEVEL_PYTHON_DEBUG
;
591 ret
= create_exclusion_list_and_validate("*",
592 opt_exclude
, &exclusion_list
);
599 warn_on_truncated_exclusion_names(exclusion_list
,
603 ret
= lttng_enable_event_with_exclusions(handle
,
606 exclusion_list
? strutils_array_of_strings_len(exclusion_list
) : 0,
610 case LTTNG_ERR_KERN_EVENT_EXIST
:
611 WARN("Kernel events already enabled (channel %s, session %s)",
612 print_channel_name(channel_name
), session_name
);
615 case LTTNG_ERR_TRACE_ALREADY_STARTED
:
617 const char *msg
= "The command tried to enable an event in a new domain for a session that has already been started once.";
618 ERR("Events: %s (channel %s, session %s)",
620 print_channel_name(channel_name
),
626 ERR("Events: %s (channel %s, session %s)",
628 ret
== -LTTNG_ERR_NEED_CHANNEL_NAME
629 ? print_raw_channel_name(channel_name
)
630 : print_channel_name(channel_name
),
638 switch (opt_event_type
) {
639 case LTTNG_EVENT_TRACEPOINT
:
640 if (opt_loglevel
&& dom
.type
!= LTTNG_DOMAIN_KERNEL
) {
641 char *exclusion_string
= print_exclusions(exclusion_list
);
643 if (!exclusion_string
) {
644 PERROR("Cannot allocate exclusion_string");
648 MSG("All %s tracepoints%s are enabled in channel %s for loglevel %s",
649 get_domain_str(dom
.type
),
651 print_channel_name(channel_name
),
653 free(exclusion_string
);
655 char *exclusion_string
= print_exclusions(exclusion_list
);
657 if (!exclusion_string
) {
658 PERROR("Cannot allocate exclusion_string");
662 MSG("All %s tracepoints%s are enabled in channel %s",
663 get_domain_str(dom
.type
),
665 print_channel_name(channel_name
));
666 free(exclusion_string
);
669 case LTTNG_EVENT_SYSCALL
:
671 MSG("All %s system calls are enabled in channel %s",
672 get_domain_str(dom
.type
),
673 print_channel_name(channel_name
));
676 case LTTNG_EVENT_ALL
:
677 if (opt_loglevel
&& dom
.type
!= LTTNG_DOMAIN_KERNEL
) {
678 char *exclusion_string
= print_exclusions(exclusion_list
);
680 if (!exclusion_string
) {
681 PERROR("Cannot allocate exclusion_string");
685 MSG("All %s events%s are enabled in channel %s for loglevel %s",
686 get_domain_str(dom
.type
),
688 print_channel_name(channel_name
),
690 free(exclusion_string
);
692 char *exclusion_string
= print_exclusions(exclusion_list
);
694 if (!exclusion_string
) {
695 PERROR("Cannot allocate exclusion_string");
699 MSG("All %s events%s are enabled in channel %s",
700 get_domain_str(dom
.type
),
702 print_channel_name(channel_name
));
703 free(exclusion_string
);
708 * We should not be here since lttng_enable_event should have
709 * failed on the event type.
716 command_ret
= lttng_enable_event_with_exclusions(handle
, ev
, channel_name
,
718 exclusion_list
? strutils_array_of_strings_len(exclusion_list
) : 0,
720 if (command_ret
< 0) {
721 switch (-command_ret
) {
722 case LTTNG_ERR_FILTER_EXIST
:
723 WARN("Filter on all events is already enabled"
724 " (channel %s, session %s)",
725 print_channel_name(channel_name
), session_name
);
728 case LTTNG_ERR_TRACE_ALREADY_STARTED
:
730 const char *msg
= "The command tried to enable an event in a new domain for a session that has already been started once.";
731 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
733 print_channel_name(channel_name
),
734 session_name
, opt_filter
);
739 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
740 lttng_strerror(command_ret
),
741 command_ret
== -LTTNG_ERR_NEED_CHANNEL_NAME
742 ? print_raw_channel_name(channel_name
)
743 : print_channel_name(channel_name
),
744 session_name
, opt_filter
);
748 error_holder
= command_ret
;
751 MSG("Filter '%s' successfully set", opt_filter
);
756 /* The wildcard * is used for kernel and ust domain to
757 * represent ALL. We copy * in event name to force the wildcard use
760 * Note: this is strictly for semantic and printing while in
761 * machine interface mode.
763 strcpy(ev
->name
, "*");
765 /* If we reach here the events are enabled */
766 if (!error
&& !warn
) {
772 ret
= mi_lttng_event(writer
, ev
, 1, handle
->domain
.type
);
778 /* print exclusion */
779 ret
= mi_print_exclusion(exclusion_list
);
786 ret
= mi_lttng_writer_write_element_bool(writer
,
787 mi_lttng_element_command_success
, success
);
793 /* Close event element */
794 ret
= mi_lttng_writer_close_element(writer
);
804 /* Strip event list */
805 event_name
= strtok(opt_event_list
, ",");
806 while (event_name
!= NULL
) {
807 /* Copy name and type of the event */
808 strncpy(ev
->name
, event_name
, LTTNG_SYMBOL_NAME_LEN
);
809 ev
->name
[LTTNG_SYMBOL_NAME_LEN
- 1] = '\0';
810 ev
->type
= opt_event_type
;
812 /* Kernel tracer action */
814 DBG("Enabling kernel event %s for channel %s",
816 print_channel_name(channel_name
));
818 switch (opt_event_type
) {
819 case LTTNG_EVENT_ALL
: /* Enable tracepoints and syscalls */
820 /* If event name differs from *, select tracepoint. */
821 if (strcmp(ev
->name
, "*")) {
822 ev
->type
= LTTNG_EVENT_TRACEPOINT
;
825 case LTTNG_EVENT_TRACEPOINT
:
827 case LTTNG_EVENT_PROBE
:
828 ret
= parse_probe_opts(ev
, opt_probe
);
830 ERR("Unable to parse probe options");
835 case LTTNG_EVENT_USERSPACE_PROBE
:
836 assert(ev
->type
== LTTNG_EVENT_USERSPACE_PROBE
);
838 ret
= parse_userspace_probe_opts(opt_userspace_probe
, &uprobe_loc
);
841 case CMD_UNSUPPORTED
:
843 * Error message describing
844 * what is not supported was
845 * printed in the function.
850 ERR("Unable to parse userspace probe options");
856 ret
= lttng_event_set_userspace_probe_location(ev
, uprobe_loc
);
858 WARN("Failed to set probe location on event");
863 /* Ownership of the uprobe location was transferred to the event. */
866 case LTTNG_EVENT_FUNCTION
:
867 ret
= parse_probe_opts(ev
, opt_function
);
869 ERR("Unable to parse function probe options");
874 case LTTNG_EVENT_SYSCALL
:
875 ev
->type
= LTTNG_EVENT_SYSCALL
;
882 /* kernel loglevels not implemented */
883 ev
->loglevel_type
= LTTNG_EVENT_LOGLEVEL_ALL
;
884 } else if (opt_userspace
) { /* User-space tracer action */
885 DBG("Enabling UST event %s for channel %s, loglevel %s", event_name
,
886 print_channel_name(channel_name
), opt_loglevel
? : "<all>");
888 switch (opt_event_type
) {
889 case LTTNG_EVENT_ALL
: /* Default behavior is tracepoint */
891 case LTTNG_EVENT_TRACEPOINT
:
892 /* Copy name and type of the event */
893 ev
->type
= LTTNG_EVENT_TRACEPOINT
;
894 strncpy(ev
->name
, event_name
, LTTNG_SYMBOL_NAME_LEN
);
895 ev
->name
[LTTNG_SYMBOL_NAME_LEN
- 1] = '\0';
897 case LTTNG_EVENT_PROBE
:
898 case LTTNG_EVENT_FUNCTION
:
899 case LTTNG_EVENT_SYSCALL
:
900 case LTTNG_EVENT_USERSPACE_PROBE
:
902 ERR("Event type not available for user-space tracing");
903 ret
= CMD_UNSUPPORTED
;
909 if (opt_event_type
!= LTTNG_EVENT_ALL
&& opt_event_type
!= LTTNG_EVENT_TRACEPOINT
) {
910 ERR("Exclusion option can only be used with tracepoint events");
914 /* Free previously allocated items */
915 strutils_free_null_terminated_array_of_strings(
917 exclusion_list
= NULL
;
918 ret
= create_exclusion_list_and_validate(
919 event_name
, opt_exclude
,
926 warn_on_truncated_exclusion_names(
927 exclusion_list
, &warn
);
930 ev
->loglevel_type
= opt_loglevel_type
;
932 enum lttng_loglevel loglevel
;
933 const int name_search_ret
= loglevel_name_to_value(opt_loglevel
, &loglevel
);
935 if (name_search_ret
== -1) {
936 ERR("Unknown loglevel %s", opt_loglevel
);
937 ret
= -LTTNG_ERR_INVALID
;
941 ev
->loglevel
= (int) loglevel
;
945 } else if (opt_jul
|| opt_log4j
|| opt_python
) {
946 if (opt_event_type
!= LTTNG_EVENT_ALL
&&
947 opt_event_type
!= LTTNG_EVENT_TRACEPOINT
) {
948 ERR("Event type not supported for domain.");
949 ret
= CMD_UNSUPPORTED
;
953 ev
->loglevel_type
= opt_loglevel_type
;
958 enum lttng_loglevel_jul loglevel
;
960 name_search_ret
= loglevel_jul_name_to_value(opt_loglevel
, &loglevel
);
961 ev
->loglevel
= (int) loglevel
;
962 } else if (opt_log4j
) {
963 enum lttng_loglevel_log4j loglevel
;
965 name_search_ret
= loglevel_log4j_name_to_value(opt_loglevel
, &loglevel
);
966 ev
->loglevel
= (int) loglevel
;
969 enum lttng_loglevel_python loglevel
;
971 name_search_ret
= loglevel_python_name_to_value(opt_loglevel
, &loglevel
);
972 ev
->loglevel
= (int) loglevel
;
975 if (name_search_ret
) {
976 ERR("Unknown loglevel %s", opt_loglevel
);
977 ret
= -LTTNG_ERR_INVALID
;
982 ev
->loglevel
= LTTNG_LOGLEVEL_JUL_ALL
;
983 } else if (opt_log4j
) {
984 ev
->loglevel
= LTTNG_LOGLEVEL_LOG4J_ALL
;
985 } else if (opt_python
) {
986 ev
->loglevel
= LTTNG_LOGLEVEL_PYTHON_DEBUG
;
989 ev
->type
= LTTNG_EVENT_TRACEPOINT
;
990 strncpy(ev
->name
, event_name
, LTTNG_SYMBOL_NAME_LEN
);
991 ev
->name
[LTTNG_SYMBOL_NAME_LEN
- 1] = '\0';
997 char *exclusion_string
;
999 command_ret
= lttng_enable_event_with_exclusions(handle
,
1002 exclusion_list
? strutils_array_of_strings_len(exclusion_list
) : 0,
1004 exclusion_string
= print_exclusions(exclusion_list
);
1005 if (!exclusion_string
) {
1006 PERROR("Cannot allocate exclusion_string");
1010 if (command_ret
< 0) {
1011 /* Turn ret to positive value to handle the positive error code */
1012 switch (-command_ret
) {
1013 case LTTNG_ERR_KERN_EVENT_EXIST
:
1014 WARN("Kernel event %s%s already enabled (channel %s, session %s)",
1017 print_channel_name(channel_name
), session_name
);
1020 case LTTNG_ERR_TRACE_ALREADY_STARTED
:
1022 const char *msg
= "The command tried to enable an event in a new domain for a session that has already been started once.";
1023 ERR("Event %s%s: %s (channel %s, session %s)", event_name
,
1026 print_channel_name(channel_name
),
1031 case LTTNG_ERR_SDT_PROBE_SEMAPHORE
:
1032 ERR("SDT probes %s guarded by semaphores are not supported (channel %s, session %s)",
1033 event_name
, print_channel_name(channel_name
),
1038 ERR("Event %s%s: %s (channel %s, session %s)", event_name
,
1040 lttng_strerror(command_ret
),
1041 command_ret
== -LTTNG_ERR_NEED_CHANNEL_NAME
1042 ? print_raw_channel_name(channel_name
)
1043 : print_channel_name(channel_name
),
1048 error_holder
= command_ret
;
1051 case LTTNG_DOMAIN_KERNEL
:
1052 case LTTNG_DOMAIN_UST
:
1053 MSG("%s event %s%s created in channel %s",
1054 get_domain_str(dom
.type
),
1057 print_channel_name(channel_name
));
1059 case LTTNG_DOMAIN_JUL
:
1060 case LTTNG_DOMAIN_LOG4J
:
1061 case LTTNG_DOMAIN_PYTHON
:
1063 * Don't print the default channel
1064 * name for agent domains.
1066 MSG("%s event %s%s enabled",
1067 get_domain_str(dom
.type
),
1075 free(exclusion_string
);
1079 char *exclusion_string
;
1081 /* Filter present */
1084 command_ret
= lttng_enable_event_with_exclusions(handle
, ev
, channel_name
,
1086 exclusion_list
? strutils_array_of_strings_len(exclusion_list
) : 0,
1088 exclusion_string
= print_exclusions(exclusion_list
);
1089 if (!exclusion_string
) {
1090 PERROR("Cannot allocate exclusion_string");
1094 if (command_ret
< 0) {
1095 switch (-command_ret
) {
1096 case LTTNG_ERR_FILTER_EXIST
:
1097 WARN("Filter on event %s%s is already enabled"
1098 " (channel %s, session %s)",
1101 print_channel_name(channel_name
), session_name
);
1104 case LTTNG_ERR_TRACE_ALREADY_STARTED
:
1106 const char *msg
= "The command tried to enable an event in a new domain for a session that has already been started once.";
1107 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev
->name
,
1110 print_channel_name(channel_name
),
1111 session_name
, opt_filter
);
1116 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev
->name
,
1118 lttng_strerror(command_ret
),
1119 command_ret
== -LTTNG_ERR_NEED_CHANNEL_NAME
1120 ? print_raw_channel_name(channel_name
)
1121 : print_channel_name(channel_name
),
1122 session_name
, opt_filter
);
1126 error_holder
= command_ret
;
1129 MSG("Event %s%s: Filter '%s' successfully set",
1130 event_name
, exclusion_string
,
1133 free(exclusion_string
);
1144 ret
= mi_lttng_event(writer
, ev
, 1, handle
->domain
.type
);
1150 /* print exclusion */
1151 ret
= mi_print_exclusion(exclusion_list
);
1158 ret
= mi_lttng_writer_write_element_bool(writer
,
1159 mi_lttng_element_command_success
, success
);
1165 /* Close event element */
1166 ret
= mi_lttng_writer_close_element(writer
);
1174 event_name
= strtok(NULL
, ",");
1175 /* Reset warn, error and success */
1182 /* Close events element */
1183 ret
= mi_lttng_writer_close_element(writer
);
1196 lttng_destroy_handle(handle
);
1197 strutils_free_null_terminated_array_of_strings(exclusion_list
);
1198 lttng_userspace_probe_location_destroy(uprobe_loc
);
1200 /* Overwrite ret with error_holder if there was an actual error with
1201 * enabling an event.
1203 ret
= error_holder
? error_holder
: ret
;
1205 lttng_event_destroy(ev
);
1210 * Add event to trace session
1212 int cmd_enable_events(int argc
, const char **argv
)
1214 int opt
, ret
= CMD_SUCCESS
, command_ret
= CMD_SUCCESS
, success
= 1;
1215 static poptContext pc
;
1216 char *session_name
= NULL
;
1217 const char *leftover
= NULL
;
1218 int event_type
= -1;
1220 pc
= poptGetContext(NULL
, argc
, argv
, long_options
, 0);
1221 poptReadDefaultConfig(pc
, 0);
1223 /* Default event type */
1224 opt_event_type
= LTTNG_EVENT_ALL
;
1226 while ((opt
= poptGetNextOpt(pc
)) != -1) {
1231 case OPT_TRACEPOINT
:
1232 opt_event_type
= LTTNG_EVENT_TRACEPOINT
;
1235 opt_event_type
= LTTNG_EVENT_PROBE
;
1237 case OPT_USERSPACE_PROBE
:
1238 opt_event_type
= LTTNG_EVENT_USERSPACE_PROBE
;
1241 opt_event_type
= LTTNG_EVENT_FUNCTION
;
1244 opt_event_type
= LTTNG_EVENT_SYSCALL
;
1250 opt_loglevel_type
= LTTNG_EVENT_LOGLEVEL_RANGE
;
1251 opt_loglevel
= poptGetOptArg(pc
);
1253 case OPT_LOGLEVEL_ONLY
:
1254 opt_loglevel_type
= LTTNG_EVENT_LOGLEVEL_SINGLE
;
1255 opt_loglevel
= poptGetOptArg(pc
);
1257 case OPT_LIST_OPTIONS
:
1258 list_cmd_options(stdout
, long_options
);
1265 ret
= CMD_UNDEFINED
;
1269 /* Validate event type. Multiple event type are not supported. */
1270 if (event_type
== -1) {
1271 event_type
= opt_event_type
;
1273 if (event_type
!= opt_event_type
) {
1274 ERR("Multiple event type not supported.");
1281 ret
= print_missing_or_multiple_domains(
1282 opt_kernel
+ opt_userspace
+ opt_jul
+ opt_log4j
+
1292 writer
= mi_lttng_writer_create(fileno(stdout
), lttng_opt_mi
);
1294 ret
= -LTTNG_ERR_NOMEM
;
1298 /* Open command element */
1299 ret
= mi_lttng_writer_command_open(writer
,
1300 mi_lttng_element_command_enable_event
);
1306 /* Open output element */
1307 ret
= mi_lttng_writer_open_element(writer
,
1308 mi_lttng_element_command_output
);
1315 opt_event_list
= (char*) poptGetArg(pc
);
1316 if (opt_event_list
== NULL
&& opt_enable_all
== 0) {
1317 ERR("Missing event name(s).\n");
1322 leftover
= poptGetArg(pc
);
1324 ERR("Unknown argument: %s", leftover
);
1329 if (!opt_session_name
) {
1330 session_name
= get_session_name();
1331 if (session_name
== NULL
) {
1332 command_ret
= CMD_ERROR
;
1337 session_name
= opt_session_name
;
1340 command_ret
= enable_events(session_name
);
1349 /* Close output element */
1350 ret
= mi_lttng_writer_close_element(writer
);
1356 ret
= mi_lttng_writer_write_element_bool(writer
,
1357 mi_lttng_element_command_success
, success
);
1363 /* Command element close */
1364 ret
= mi_lttng_writer_command_close(writer
);
1373 if (writer
&& mi_lttng_writer_destroy(writer
)) {
1374 /* Preserve original error code */
1375 ret
= ret
? ret
: LTTNG_ERR_MI_IO_FAIL
;
1378 if (opt_session_name
== NULL
) {
1382 /* Overwrite ret if an error occurred in enable_events */
1383 ret
= command_ret
? command_ret
: ret
;
1385 poptFreeContext(pc
);