/*
* ltt-probes.c
*
- * Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
* Holds LTTng probes registry.
*
- * Dual LGPL v2.1/GPL v2 license.
+ * Copyright 2010-2012 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; only
+ * version 2.1 of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include <urcu/list.h>
#include <urcu/hlist.h>
#include <lttng/ust-events.h>
+#include <lttng/tracepoint.h>
+#include "tracepoint-internal.h"
#include <assert.h>
#include <helper.h>
#include <ctype.h>
*/
static CDS_LIST_HEAD(probe_list);
-/*
- * Wildcard list, containing the active wildcards.
- * Protected by ust lock.
- */
-static CDS_LIST_HEAD(wildcard_list);
-
static
const struct lttng_probe_desc *find_provider(const char *provider)
{
* fix the events awaiting probe load.
*/
for (i = 0; i < desc->nr_events; i++) {
- ret = pending_probe_fix_events(desc->event_desc[i]);
+ const struct lttng_event_desc *ed;
+
+ ed = desc->event_desc[i];
+ DBG("Registered event probe \"%s\" with signature \"%s\"",
+ ed->name, ed->signature);
+ ret = pending_probe_fix_events(ed);
assert(!ret);
}
end:
LTTNG_UST_SYM_NAME_LEN);
list_entry->tp.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
if (!probe_desc->event_desc[i]->loglevel) {
- list_entry->tp.loglevel[0] = '\0';
- list_entry->tp.loglevel_value = 0;
+ list_entry->tp.loglevel = TRACE_DEFAULT;
} else {
- strncpy(list_entry->tp.loglevel,
- (*probe_desc->event_desc[i]->loglevel)->identifier,
- LTTNG_UST_SYM_NAME_LEN);
- list_entry->tp.loglevel[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
- list_entry->tp.loglevel_value =
- (*probe_desc->event_desc[i]->loglevel)->value;
+ list_entry->tp.loglevel = *(*probe_desc->event_desc[i]->loglevel);
}
}
}
return &entry->tp;
}
-/* WILDCARDS */
+void ltt_probes_prune_field_list(struct lttng_ust_field_list *list)
+{
+ struct tp_field_list_entry *list_entry, *tmp;
+
+ cds_list_for_each_entry_safe(list_entry, tmp, &list->head, head) {
+ cds_list_del(&list_entry->head);
+ free(list_entry);
+ }
+}
/*
- * Return wildcard for a given event name if the event name match the
- * one of the wildcards.
- * Must be called with ust lock held.
- * Returns NULL if not present.
+ * called with UST lock held.
*/
-struct wildcard_entry *match_wildcard(const char *name)
+int ltt_probes_get_field_list(struct lttng_ust_field_list *list)
{
- struct wildcard_entry *e;
-
- cds_list_for_each_entry(e, &wildcard_list, list) {
- /* If only contain '*' */
- if (strlen(e->name) == 1)
- return e;
- /* Compare excluding final '*' */
- if (!strncmp(name, e->name, strlen(e->name) - 1))
- return e;
+ struct lttng_probe_desc *probe_desc;
+ int i;
+
+ CDS_INIT_LIST_HEAD(&list->head);
+ cds_list_for_each_entry(probe_desc, &probe_list, head) {
+ for (i = 0; i < probe_desc->nr_events; i++) {
+ const struct lttng_event_desc *event_desc =
+ probe_desc->event_desc[i];
+ int j;
+
+ if (event_desc->nr_fields == 0) {
+ /* Events without fields. */
+ struct tp_field_list_entry *list_entry;
+
+ list_entry = zmalloc(sizeof(*list_entry));
+ if (!list_entry)
+ goto err_nomem;
+ cds_list_add(&list_entry->head, &list->head);
+ strncpy(list_entry->field.event_name,
+ event_desc->name,
+ LTTNG_UST_SYM_NAME_LEN);
+ list_entry->field.event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ list_entry->field.field_name[0] = '\0';
+ list_entry->field.type = LTTNG_UST_FIELD_OTHER;
+ if (!event_desc->loglevel) {
+ list_entry->field.loglevel = TRACE_DEFAULT;
+ } else {
+ list_entry->field.loglevel = *(*event_desc->loglevel);
+ }
+ list_entry->field.nowrite = 1;
+ }
+
+ for (j = 0; j < event_desc->nr_fields; j++) {
+ const struct lttng_event_field *event_field =
+ &event_desc->fields[j];
+ struct tp_field_list_entry *list_entry;
+
+ list_entry = zmalloc(sizeof(*list_entry));
+ if (!list_entry)
+ goto err_nomem;
+ cds_list_add(&list_entry->head, &list->head);
+ strncpy(list_entry->field.event_name,
+ event_desc->name,
+ LTTNG_UST_SYM_NAME_LEN);
+ list_entry->field.event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ strncpy(list_entry->field.field_name,
+ event_field->name,
+ LTTNG_UST_SYM_NAME_LEN);
+ list_entry->field.field_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ switch (event_field->type.atype) {
+ case atype_integer:
+ list_entry->field.type = LTTNG_UST_FIELD_INTEGER;
+ break;
+ case atype_string:
+ list_entry->field.type = LTTNG_UST_FIELD_STRING;
+ break;
+ case atype_array:
+ if (event_field->type.u.array.elem_type.atype != atype_integer
+ || event_field->type.u.array.elem_type.u.basic.integer.encoding == lttng_encode_none)
+ list_entry->field.type = LTTNG_UST_FIELD_OTHER;
+ else
+ list_entry->field.type = LTTNG_UST_FIELD_STRING;
+ break;
+ case atype_sequence:
+ if (event_field->type.u.sequence.elem_type.atype != atype_integer
+ || event_field->type.u.sequence.elem_type.u.basic.integer.encoding == lttng_encode_none)
+ list_entry->field.type = LTTNG_UST_FIELD_OTHER;
+ else
+ list_entry->field.type = LTTNG_UST_FIELD_STRING;
+ break;
+ case atype_float:
+ list_entry->field.type = LTTNG_UST_FIELD_FLOAT;
+ break;
+ case atype_enum:
+ list_entry->field.type = LTTNG_UST_FIELD_ENUM;
+ break;
+ default:
+ list_entry->field.type = LTTNG_UST_FIELD_OTHER;
+ }
+ if (!event_desc->loglevel) {
+ list_entry->field.loglevel = TRACE_DEFAULT;
+ } else {
+ list_entry->field.loglevel = *(*event_desc->loglevel);
+ }
+ list_entry->field.nowrite = event_field->nowrite;
+ }
+ }
}
- return NULL;
+ if (cds_list_empty(&list->head))
+ list->iter = NULL;
+ else
+ list->iter =
+ cds_list_first_entry(&list->head,
+ struct tp_field_list_entry, head);
+ return 0;
+
+err_nomem:
+ ltt_probes_prune_field_list(list);
+ return -ENOMEM;
+}
+
+/*
+ * Return current iteration position, advance internal iterator to next.
+ * Return NULL if end of list.
+ */
+struct lttng_ust_field_iter *
+ lttng_ust_field_list_get_iter_next(struct lttng_ust_field_list *list)
+{
+ struct tp_field_list_entry *entry;
+
+ if (!list->iter)
+ return NULL;
+ entry = list->iter;
+ if (entry->head.next == &list->head)
+ list->iter = NULL;
+ else
+ list->iter = cds_list_entry(entry->head.next,
+ struct tp_field_list_entry, head);
+ return &entry->field;
}
/*
* marshall all probes/all events and create those that fit the
* wildcard. Add them to the events list as created.
*/
-static
-void _probes_create_wildcard_events(struct wildcard_entry *entry,
+void ltt_probes_create_wildcard_events(struct wildcard_entry *entry,
struct session_wildcard *wildcard)
{
struct lttng_probe_desc *probe_desc;
&& (strlen(entry->name) == 1
|| !strncmp(event_desc->name, entry->name,
strlen(entry->name) - 1))) {
- /* TODO: get value from loglevel. */
-
- /* TODO: check if loglevel match */
- //if (event_desc->loglevel
- // && (*event_desc->loglevel)->value ...)
- match = 1;
+ if (ltt_loglevel_match(event_desc,
+ entry->loglevel_type,
+ entry->loglevel)) {
+ match = 1;
+ }
}
if (match) {
struct ltt_event *ev;
memcpy(&event_param, &wildcard->event_param,
sizeof(event_param));
- memcpy(event_param.name,
+ strncpy(event_param.name,
event_desc->name,
sizeof(event_param.name));
+ event_param.name[sizeof(event_param.name) - 1] = '\0';
/* create event */
ret = ltt_event_create(wildcard->chan,
- &event_param, NULL,
- &ev);
+ &event_param, &ev);
if (ret) {
DBG("Error creating event");
continue;
}
}
}
+ lttng_filter_wildcard_link_bytecode(wildcard);
}
-/*
- * Add the wildcard to the wildcard list. Must be called with
- * ust lock held.
- */
-struct session_wildcard *add_wildcard(const char *name,
- struct ltt_channel *chan,
- struct lttng_ust_event *event_param)
-{
- struct wildcard_entry *e;
- struct session_wildcard *sw;
- size_t name_len = strlen(name) + 1;
- int found = 0;
-
- /* try to find global wildcard entry */
- cds_list_for_each_entry(e, &wildcard_list, list) {
- if (!strncmp(name, e->name, LTTNG_UST_SYM_NAME_LEN - 1)) {
- found = 1;
- break;
- }
- }
-
- if (!found) {
- /*
- * Create global wildcard entry if not found. Using
- * zmalloc here to allocate a variable length element.
- * Could cause some memory fragmentation if overused.
- */
- e = zmalloc(sizeof(struct wildcard_entry) + name_len);
- if (!e)
- return ERR_PTR(-ENOMEM);
- memcpy(&e->name[0], name, name_len);
- cds_list_add(&e->list, &wildcard_list);
- CDS_INIT_LIST_HEAD(&e->session_list);
- }
-
- /* session wildcard */
- cds_list_for_each_entry(sw, &e->session_list, session_list) {
- if (chan == sw->chan) {
- DBG("wildcard %s busy for this channel", name);
- return ERR_PTR(-EEXIST); /* Already there */
- }
- }
- sw = zmalloc(sizeof(struct session_wildcard));
- if (!sw)
- return ERR_PTR(-ENOMEM);
- sw->chan = chan;
- sw->enabled = 1;
- memcpy(&sw->event_param, event_param, sizeof(sw->event_param));
- sw->event_param.instrumentation = LTTNG_UST_TRACEPOINT;
- CDS_INIT_LIST_HEAD(&sw->events);
- cds_list_add(&sw->list, &chan->session->wildcards);
- cds_list_add(&sw->session_list, &e->session_list);
- sw->entry = e;
- _probes_create_wildcard_events(e, sw);
- return sw;
-}
-
-/*
- * Remove the wildcard from the wildcard list. Must be called with
- * ust_lock held. Only called at session teardown.
- */
-void _remove_wildcard(struct session_wildcard *wildcard)
-{
- struct ltt_event *ev, *tmp;
-
- /*
- * Just remove the events owned (for enable/disable) by this
- * wildcard from the list. The session teardown will take care
- * of freeing the event memory.
- */
- cds_list_for_each_entry_safe(ev, tmp, &wildcard->events,
- wildcard_list) {
- cds_list_del(&ev->wildcard_list);
- }
- cds_list_del(&wildcard->session_list);
- cds_list_del(&wildcard->list);
- if (cds_list_empty(&wildcard->entry->session_list)) {
- cds_list_del(&wildcard->entry->list);
- free(wildcard->entry);
- }
- free(wildcard);
-}
-
-int ltt_wildcard_enable(struct session_wildcard *wildcard)
-{
- struct ltt_event *ev;
- int ret;
-
- if (wildcard->enabled)
- return -EEXIST;
- cds_list_for_each_entry(ev, &wildcard->events, wildcard_list) {
- ret = ltt_event_enable(ev);
- if (ret) {
- DBG("Error: enable error.\n");
- return ret;
- }
- }
- wildcard->enabled = 1;
- return 0;
-}
-
-int ltt_wildcard_disable(struct session_wildcard *wildcard)
-{
- struct ltt_event *ev;
- int ret;
-
- if (!wildcard->enabled)
- return -EEXIST;
- cds_list_for_each_entry(ev, &wildcard->events, wildcard_list) {
- ret = ltt_event_disable(ev);
- if (ret) {
- DBG("Error: disable error.\n");
- return ret;
- }
- }
- wildcard->enabled = 0;
- return 0;
-}
projects / lttng-ust.git / blobdiff