/*
* 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);
-/*
- * Loglevel hash table, containing the active loglevels.
- * Protected by ust lock.
- */
-#define LOGLEVEL_HASH_BITS 6
-#define LOGLEVEL_TABLE_SIZE (1 << LOGLEVEL_HASH_BITS)
-static struct cds_hlist_head loglevel_table[LOGLEVEL_TABLE_SIZE];
-
-/*
- * 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;
}
-/*
- * Get loglevel if the loglevel is present in the loglevel hash table.
- * Must be called with ust lock held.
- * Returns NULL if not present.
- */
-struct loglevel_entry *get_loglevel(const char *name)
-{
- struct cds_hlist_head *head;
- struct cds_hlist_node *node;
- struct loglevel_entry *e;
- size_t name_len = strlen(name);
- uint32_t hash;
-
- if (name_len > LTTNG_UST_SYM_NAME_LEN - 1) {
- WARN("Truncating loglevel name %s which exceeds size limits of %u chars", name, LTTNG_UST_SYM_NAME_LEN - 1);
- name_len = LTTNG_UST_SYM_NAME_LEN - 1;
- }
- hash = jhash(name, name_len, 0);
- head = &loglevel_table[hash & (LOGLEVEL_TABLE_SIZE - 1)];
- cds_hlist_for_each_entry(e, node, head, hlist) {
- if (!strncmp(name, e->name, LTTNG_UST_SYM_NAME_LEN - 1))
- return e;
- }
- return NULL;
-}
-
-struct loglevel_entry *get_loglevel_value(int64_t value)
-{
- char name[LTTNG_UST_SYM_NAME_LEN];
- int ret;
-
- ret = snprintf(name, LTTNG_UST_SYM_NAME_LEN, "%lld", (long long) value);
- if (ret < 0)
- return NULL;
- return get_loglevel(name);
-}
-
-/*
- * marshall all probes/all events and create those that fit the
- * loglevel. Add them to the events list as created.
- */
-static
-void _probes_create_loglevel_events(struct loglevel_entry *entry,
- struct session_loglevel *loglevel)
-{
- struct lttng_probe_desc *probe_desc;
- struct lttng_ust_event event_param;
- int i;
-
- cds_list_for_each_entry(probe_desc, &probe_list, head) {
- for (i = 0; i < probe_desc->nr_events; i++) {
- const struct tracepoint_loglevel_entry *ev_ll;
- const struct lttng_event_desc *event_desc;
- int match = 0;
-
- event_desc = probe_desc->event_desc[i];
- if (!(event_desc->loglevel))
- continue;
- ev_ll = *event_desc->loglevel;
- if (isdigit(entry->name[0])) {
- if (atoll(entry->name) == ev_ll->value) {
- match = 1;
- }
- } else if (!strncmp(ev_ll->identifier, entry->name,
- LTTNG_UST_SYM_NAME_LEN - 1)) {
- match = 1;
- }
-
- if (match) {
- struct ltt_event *ev;
- int ret;
-
- memcpy(&event_param, &loglevel->event_param,
- sizeof(event_param));
- memcpy(event_param.name,
- event_desc->name,
- sizeof(event_param.name));
- /* create event */
- ret = ltt_event_create(loglevel->chan,
- &event_param, NULL,
- &ev);
- if (ret) {
- DBG("Error creating event");
- continue;
- }
- cds_list_add(&ev->loglevel_list,
- &loglevel->events);
- }
- }
- }
-}
-
-/*
- * Add the loglevel to the loglevel hash table. Must be called with
- * ust lock held.
- * TODO: should be integrated with events and wildcards.
- */
-struct session_loglevel *add_loglevel(const char *name,
- struct ltt_channel *chan,
- struct lttng_ust_event *event_param)
-{
- struct cds_hlist_head *head;
- struct cds_hlist_node *node;
- struct loglevel_entry *e;
- struct session_loglevel *sl;
- int found = 0;
- size_t name_len = strlen(name);
- uint32_t hash;
-
- if (name_len > LTTNG_UST_SYM_NAME_LEN - 1) {
- WARN("Truncating loglevel name %s which exceeds size limits of %u chars", name, LTTNG_UST_SYM_NAME_LEN - 1);
- name_len = LTTNG_UST_SYM_NAME_LEN - 1;
- }
- hash = jhash(name, name_len, 0);
- /* loglevel entry */
- head = &loglevel_table[hash & (LOGLEVEL_TABLE_SIZE - 1)];
- cds_hlist_for_each_entry(e, node, head, hlist) {
- if (!strncmp(name, e->name, LTTNG_UST_SYM_NAME_LEN - 1)) {
- found = 1;
- break;
- }
- }
-
- if (!found) {
- /*
- * Using zmalloc here to allocate a variable length element. Could
- * cause some memory fragmentation if overused.
- */
- e = zmalloc(sizeof(struct loglevel_entry) + name_len + 1);
- if (!e)
- return ERR_PTR(-ENOMEM);
- memcpy(&e->name[0], name, name_len + 1);
- e->name[name_len] = '\0';
- cds_hlist_add_head(&e->hlist, head);
- CDS_INIT_LIST_HEAD(&e->session_list);
- }
-
- /* session loglevel */
- cds_list_for_each_entry(sl, &e->session_list, session_list) {
- if (chan == sl->chan) {
- DBG("loglevel %s busy for this channel", name);
- return ERR_PTR(-EEXIST); /* Already there */
- }
- }
- sl = zmalloc(sizeof(struct session_loglevel));
- if (!sl)
- return ERR_PTR(-ENOMEM);
- sl->chan = chan;
- sl->enabled = 1;
- memcpy(&sl->event_param, event_param, sizeof(sl->event_param));
- sl->event_param.instrumentation = LTTNG_UST_TRACEPOINT;
- CDS_INIT_LIST_HEAD(&sl->events);
- cds_list_add(&sl->list, &chan->session->loglevels);
- cds_list_add(&sl->session_list, &e->session_list);
- sl->entry = e;
- _probes_create_loglevel_events(e, sl);
- return sl;
-}
-
-/*
- * Remove the loglevel from the loglevel hash table. Must be called with
- * ust_lock held. Only called at session teardown.
- */
-void _remove_loglevel(struct session_loglevel *loglevel)
-{
- struct ltt_event *ev, *tmp;
-
- /*
- * Just remove the events owned (for enable/disable) by this
- * loglevel from the list. The session teardown will take care
- * of freeing the event memory.
- */
- cds_list_for_each_entry_safe(ev, tmp, &loglevel->events,
- loglevel_list) {
- cds_list_del(&ev->loglevel_list);
- }
- cds_list_del(&loglevel->session_list);
- cds_list_del(&loglevel->list);
- if (cds_list_empty(&loglevel->entry->session_list)) {
- cds_hlist_del(&loglevel->entry->hlist);
- free(loglevel->entry);
- }
- free(loglevel);
-}
-
-int ltt_loglevel_enable(struct session_loglevel *loglevel)
-{
- struct ltt_event *ev;
- int ret;
-
- if (loglevel->enabled)
- return -EEXIST;
- cds_list_for_each_entry(ev, &loglevel->events, loglevel_list) {
- ret = ltt_event_enable(ev);
- if (ret) {
- DBG("Error: enable error.\n");
- return ret;
- }
- }
- loglevel->enabled = 1;
- return 0;
-}
-
-int ltt_loglevel_disable(struct session_loglevel *loglevel)
-{
- struct ltt_event *ev;
- int ret;
-
- if (!loglevel->enabled)
- return -EEXIST;
- cds_list_for_each_entry(ev, &loglevel->events, loglevel_list) {
- ret = ltt_event_disable(ev);
- if (ret) {
- DBG("Error: disable error.\n");
- return ret;
- }
- }
- loglevel->enabled = 0;
- return 0;
-}
-
-/* WILDCARDS */
-
-/*
- * 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.
- */
-struct wildcard_entry *match_wildcard(const char *name)
-{
- 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;
- }
- return NULL;
-}
-
/*
* 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))) {
- 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,
}
}
-/*
- * Add the wildcard to the wildcard hash table. 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;
-
- /* 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) {
- /*
- * 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 hash table. 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