* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#define _GNU_SOURCE
+#define _LGPL_SOURCE
#include <stdio.h>
-#include <urcu/list.h>
-#include <urcu/hlist.h>
-#include <pthread.h>
+#include <assert.h>
#include <errno.h>
+#include <limits.h>
+#include <pthread.h>
#include <sys/shm.h>
#include <sys/ipc.h>
#include <stdint.h>
#include <stddef.h>
#include <inttypes.h>
#include <time.h>
+#include <stdbool.h>
+#include <unistd.h>
#include <lttng/ust-endian.h>
-#include "clock.h"
#include <urcu-bp.h>
+#include <urcu/arch.h>
#include <urcu/compiler.h>
+#include <urcu/hlist.h>
+#include <urcu/list.h>
#include <urcu/uatomic.h>
-#include <urcu/arch.h>
#include <lttng/tracepoint.h>
#include <lttng/ust-events.h>
#include <helper.h>
#include <lttng/ust-ctl.h>
#include <ust-comm.h>
+#include <ust-fd.h>
+#include <lttng/ust-dynamic-type.h>
+#include <lttng/ust-context-provider.h>
#include "error.h"
#include "compat.h"
#include "lttng-ust-uuid.h"
#include "tracepoint-internal.h"
+#include "string-utils.h"
+#include "lttng-bytecode.h"
#include "lttng-tracer.h"
#include "lttng-tracer-core.h"
-#include "lttng-ust-baddr.h"
+#include "lttng-ust-statedump.h"
+#include "ust-events-internal.h"
#include "wait.h"
#include "../libringbuffer/shm.h"
#include "jhash.h"
+#include <lttng/ust-abi.h>
/*
- * The sessions mutex is the centralized mutex across UST tracing
- * control and probe registration. All operations within this file are
- * called by the communication thread, under ust_lock protection.
+ * All operations within this file are called by the communication
+ * thread, under ust_lock protection.
*/
-static pthread_mutex_t sessions_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-void ust_lock(void)
-{
- pthread_mutex_lock(&sessions_mutex);
-}
-
-void ust_unlock(void)
-{
- pthread_mutex_unlock(&sessions_mutex);
-}
static CDS_LIST_HEAD(sessions);
+static CDS_LIST_HEAD(event_notifier_groups);
struct cds_list_head *_lttng_get_sessions(void)
{
}
static void _lttng_event_destroy(struct lttng_event *event);
+static void _lttng_event_notifier_destroy(
+ struct lttng_event_notifier *event_notifier);
+static void _lttng_enum_destroy(struct lttng_enum *_enum);
static
-void lttng_session_lazy_sync_enablers(struct lttng_session *session);
+void lttng_session_lazy_sync_event_enablers(struct lttng_session *session);
static
-void lttng_session_sync_enablers(struct lttng_session *session);
+void lttng_session_sync_event_enablers(struct lttng_session *session);
+static
+void lttng_event_notifier_group_sync_enablers(
+ struct lttng_event_notifier_group *event_notifier_group);
static
void lttng_enabler_destroy(struct lttng_enabler *enabler);
enum lttng_ust_loglevel_type req_type,
int req_loglevel)
{
- if (req_type == LTTNG_UST_LOGLEVEL_ALL)
- return 1;
if (!has_loglevel)
loglevel = TRACE_DEFAULT;
switch (req_type) {
case LTTNG_UST_LOGLEVEL_RANGE:
- if (loglevel <= req_loglevel || req_loglevel == -1)
+ if (loglevel <= req_loglevel
+ || (req_loglevel == -1 && loglevel <= TRACE_DEBUG))
return 1;
else
return 0;
case LTTNG_UST_LOGLEVEL_SINGLE:
- if (loglevel == req_loglevel || req_loglevel == -1)
+ if (loglevel == req_loglevel
+ || (req_loglevel == -1 && loglevel <= TRACE_DEBUG))
return 1;
else
return 0;
case LTTNG_UST_LOGLEVEL_ALL:
default:
- return 1;
+ if (loglevel <= TRACE_DEBUG)
+ return 1;
+ else
+ return 0;
}
}
session = zmalloc(sizeof(struct lttng_session));
if (!session)
return NULL;
+ if (lttng_session_context_init(&session->ctx)) {
+ free(session);
+ return NULL;
+ }
CDS_INIT_LIST_HEAD(&session->chan_head);
CDS_INIT_LIST_HEAD(&session->events_head);
+ CDS_INIT_LIST_HEAD(&session->enums_head);
CDS_INIT_LIST_HEAD(&session->enablers_head);
for (i = 0; i < LTTNG_UST_EVENT_HT_SIZE; i++)
CDS_INIT_HLIST_HEAD(&session->events_ht.table[i]);
+ for (i = 0; i < LTTNG_UST_ENUM_HT_SIZE; i++)
+ CDS_INIT_HLIST_HEAD(&session->enums_ht.table[i]);
cds_list_add(&session->node, &sessions);
return session;
}
+struct lttng_event_notifier_group *lttng_event_notifier_group_create(void)
+{
+ struct lttng_event_notifier_group *event_notifier_group;
+ int i;
+
+ event_notifier_group = zmalloc(sizeof(struct lttng_event_notifier_group));
+ if (!event_notifier_group)
+ return NULL;
+
+ CDS_INIT_LIST_HEAD(&event_notifier_group->enablers_head);
+ CDS_INIT_LIST_HEAD(&event_notifier_group->event_notifiers_head);
+ for (i = 0; i < LTTNG_UST_EVENT_NOTIFIER_HT_SIZE; i++)
+ CDS_INIT_HLIST_HEAD(&event_notifier_group->event_notifiers_ht.table[i]);
+
+ cds_list_add(&event_notifier_group->node, &event_notifier_groups);
+
+ return event_notifier_group;
+}
+
/*
* Only used internally at session destruction.
*/
assert(event->registered == 0);
desc = event->desc;
- ret = __tracepoint_probe_register(desc->name,
+ ret = __tracepoint_probe_register_queue_release(desc->name,
desc->probe_callback,
event, desc->signature);
WARN_ON_ONCE(ret);
event->registered = 1;
}
+static
+void register_event_notifier(struct lttng_event_notifier *event_notifier)
+{
+ int ret;
+ const struct lttng_event_desc *desc;
+
+ assert(event_notifier->registered == 0);
+ desc = event_notifier->desc;
+ ret = __tracepoint_probe_register_queue_release(desc->name,
+ desc->u.ext.event_notifier_callback, event_notifier, desc->signature);
+ WARN_ON_ONCE(ret);
+ if (!ret)
+ event_notifier->registered = 1;
+}
+
static
void unregister_event(struct lttng_event *event)
{
assert(event->registered == 1);
desc = event->desc;
- ret = __tracepoint_probe_unregister(desc->name,
+ ret = __tracepoint_probe_unregister_queue_release(desc->name,
desc->probe_callback,
event);
WARN_ON_ONCE(ret);
event->registered = 0;
}
+static
+void unregister_event_notifier(struct lttng_event_notifier *event_notifier)
+{
+ int ret;
+ const struct lttng_event_desc *desc;
+
+ assert(event_notifier->registered == 1);
+ desc = event_notifier->desc;
+ ret = __tracepoint_probe_unregister_queue_release(desc->name,
+ desc->u.ext.event_notifier_callback, event_notifier);
+ WARN_ON_ONCE(ret);
+ if (!ret)
+ event_notifier->registered = 0;
+}
+
/*
* Only used internally at session destruction.
*/
unregister_event(event);
}
+/*
+ * Only used internally at session destruction.
+ */
+static
+void _lttng_event_notifier_unregister(struct lttng_event_notifier *event_notifier)
+{
+ if (event_notifier->registered)
+ unregister_event_notifier(event_notifier);
+}
+
void lttng_session_destroy(struct lttng_session *session)
{
struct lttng_channel *chan, *tmpchan;
struct lttng_event *event, *tmpevent;
- struct lttng_enabler *enabler, *tmpenabler;
+ struct lttng_enum *_enum, *tmp_enum;
+ struct lttng_event_enabler *event_enabler, *event_tmpenabler;
CMM_ACCESS_ONCE(session->active) = 0;
cds_list_for_each_entry(event, &session->events_head, node) {
_lttng_event_unregister(event);
}
synchronize_trace(); /* Wait for in-flight events to complete */
- cds_list_for_each_entry_safe(enabler, tmpenabler,
+ __tracepoint_probe_prune_release_queue();
+ cds_list_for_each_entry_safe(event_enabler, event_tmpenabler,
&session->enablers_head, node)
- lttng_enabler_destroy(enabler);
+ lttng_event_enabler_destroy(event_enabler);
cds_list_for_each_entry_safe(event, tmpevent,
&session->events_head, node)
_lttng_event_destroy(event);
+ cds_list_for_each_entry_safe(_enum, tmp_enum,
+ &session->enums_head, node)
+ _lttng_enum_destroy(_enum);
cds_list_for_each_entry_safe(chan, tmpchan, &session->chan_head, node)
_lttng_channel_unmap(chan);
cds_list_del(&session->node);
+ lttng_destroy_context(session->ctx);
free(session);
}
+void lttng_event_notifier_group_destroy(
+ struct lttng_event_notifier_group *event_notifier_group)
+{
+ int close_ret;
+ struct lttng_event_notifier_enabler *notifier_enabler, *tmpnotifier_enabler;
+ struct lttng_event_notifier *notifier, *tmpnotifier;
+
+ if (!event_notifier_group) {
+ return;
+ }
+
+ cds_list_for_each_entry(notifier,
+ &event_notifier_group->event_notifiers_head, node)
+ _lttng_event_notifier_unregister(notifier);
+
+ synchronize_trace();
+
+ cds_list_for_each_entry_safe(notifier_enabler, tmpnotifier_enabler,
+ &event_notifier_group->enablers_head, node)
+ lttng_event_notifier_enabler_destroy(notifier_enabler);
+
+ cds_list_for_each_entry_safe(notifier, tmpnotifier,
+ &event_notifier_group->event_notifiers_head, node)
+ _lttng_event_notifier_destroy(notifier);
+
+ /* Close the notification fd to the listener of event notifiers. */
+
+ lttng_ust_lock_fd_tracker();
+ close_ret = close(event_notifier_group->notification_fd);
+ if (!close_ret) {
+ lttng_ust_delete_fd_from_tracker(
+ event_notifier_group->notification_fd);
+ } else {
+ PERROR("close");
+ abort();
+ }
+ lttng_ust_unlock_fd_tracker();
+
+ cds_list_del(&event_notifier_group->node);
+
+ free(event_notifier_group);
+}
+
+static
+void lttng_enabler_destroy(struct lttng_enabler *enabler)
+{
+ struct lttng_ust_bytecode_node *filter_node, *tmp_filter_node;
+ struct lttng_ust_excluder_node *excluder_node, *tmp_excluder_node;
+
+ if (!enabler) {
+ return;
+ }
+
+ /* Destroy filter bytecode */
+ cds_list_for_each_entry_safe(filter_node, tmp_filter_node,
+ &enabler->filter_bytecode_head, node) {
+ free(filter_node);
+ }
+
+ /* Destroy excluders */
+ cds_list_for_each_entry_safe(excluder_node, tmp_excluder_node,
+ &enabler->excluder_head, node) {
+ free(excluder_node);
+ }
+}
+
+ void lttng_event_notifier_enabler_destroy(struct lttng_event_notifier_enabler *event_notifier_enabler)
+{
+ if (!event_notifier_enabler) {
+ return;
+ }
+
+ cds_list_del(&event_notifier_enabler->node);
+
+ lttng_enabler_destroy(lttng_event_notifier_enabler_as_enabler(event_notifier_enabler));
+
+ free(event_notifier_enabler);
+}
+
+static
+int lttng_enum_create(const struct lttng_enum_desc *desc,
+ struct lttng_session *session)
+{
+ const char *enum_name = desc->name;
+ struct lttng_enum *_enum;
+ struct cds_hlist_head *head;
+ int ret = 0;
+ size_t name_len = strlen(enum_name);
+ uint32_t hash;
+ int notify_socket;
+
+ /* Check if this enum is already registered for this session. */
+ hash = jhash(enum_name, name_len, 0);
+ head = &session->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)];
+
+ _enum = lttng_ust_enum_get_from_desc(session, desc);
+ if (_enum) {
+ ret = -EEXIST;
+ goto exist;
+ }
+
+ notify_socket = lttng_get_notify_socket(session->owner);
+ if (notify_socket < 0) {
+ ret = notify_socket;
+ goto socket_error;
+ }
+
+ _enum = zmalloc(sizeof(*_enum));
+ if (!_enum) {
+ ret = -ENOMEM;
+ goto cache_error;
+ }
+ _enum->session = session;
+ _enum->desc = desc;
+
+ ret = ustcomm_register_enum(notify_socket,
+ session->objd,
+ enum_name,
+ desc->nr_entries,
+ desc->entries,
+ &_enum->id);
+ if (ret < 0) {
+ DBG("Error (%d) registering enumeration to sessiond", ret);
+ goto sessiond_register_error;
+ }
+ cds_list_add(&_enum->node, &session->enums_head);
+ cds_hlist_add_head(&_enum->hlist, head);
+ return 0;
+
+sessiond_register_error:
+ free(_enum);
+cache_error:
+socket_error:
+exist:
+ return ret;
+}
+
+static
+int lttng_create_enum_check(const struct lttng_type *type,
+ struct lttng_session *session)
+{
+ switch (type->atype) {
+ case atype_enum:
+ {
+ const struct lttng_enum_desc *enum_desc;
+ int ret;
+
+ enum_desc = type->u.legacy.basic.enumeration.desc;
+ ret = lttng_enum_create(enum_desc, session);
+ if (ret && ret != -EEXIST) {
+ DBG("Unable to create enum error: (%d)", ret);
+ return ret;
+ }
+ break;
+ }
+ case atype_enum_nestable:
+ {
+ const struct lttng_enum_desc *enum_desc;
+ int ret;
+
+ enum_desc = type->u.enum_nestable.desc;
+ ret = lttng_enum_create(enum_desc, session);
+ if (ret && ret != -EEXIST) {
+ DBG("Unable to create enum error: (%d)", ret);
+ return ret;
+ }
+ break;
+ }
+ case atype_dynamic:
+ {
+ const struct lttng_event_field *tag_field_generic;
+ const struct lttng_enum_desc *enum_desc;
+ int ret;
+
+ tag_field_generic = lttng_ust_dynamic_type_tag_field();
+ enum_desc = tag_field_generic->type.u.enum_nestable.desc;
+ ret = lttng_enum_create(enum_desc, session);
+ if (ret && ret != -EEXIST) {
+ DBG("Unable to create enum error: (%d)", ret);
+ return ret;
+ }
+ break;
+ }
+ default:
+ /* TODO: nested types when they become supported. */
+ break;
+ }
+ return 0;
+}
+
+static
+int lttng_create_all_event_enums(size_t nr_fields,
+ const struct lttng_event_field *event_fields,
+ struct lttng_session *session)
+{
+ size_t i;
+ int ret;
+
+ /* For each field, ensure enum is part of the session. */
+ for (i = 0; i < nr_fields; i++) {
+ const struct lttng_type *type = &event_fields[i].type;
+
+ ret = lttng_create_enum_check(type, session);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+static
+int lttng_create_all_ctx_enums(size_t nr_fields,
+ const struct lttng_ctx_field *ctx_fields,
+ struct lttng_session *session)
+{
+ size_t i;
+ int ret;
+
+ /* For each field, ensure enum is part of the session. */
+ for (i = 0; i < nr_fields; i++) {
+ const struct lttng_type *type = &ctx_fields[i].event_field.type;
+
+ ret = lttng_create_enum_check(type, session);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+/*
+ * Ensure that a state-dump will be performed for this session at the end
+ * of the current handle_message().
+ */
+int lttng_session_statedump(struct lttng_session *session)
+{
+ session->statedump_pending = 1;
+ lttng_ust_sockinfo_session_enabled(session->owner);
+ return 0;
+}
+
int lttng_session_enable(struct lttng_session *session)
{
int ret = 0;
/* Set transient enabler state to "enabled" */
session->tstate = 1;
+
/* We need to sync enablers with session before activation. */
- lttng_session_sync_enablers(session);
+ lttng_session_sync_event_enablers(session);
/*
* Snapshot the number of events per channel to know the type of header
if (ctx) {
nr_fields = ctx->nr_fields;
fields = ctx->fields;
+ ret = lttng_create_all_ctx_enums(nr_fields, fields,
+ session);
+ if (ret < 0) {
+ DBG("Error (%d) adding enum to session", ret);
+ return ret;
+ }
}
ret = ustcomm_register_channel(notify_socket,
+ session,
session->objd,
chan->objd,
nr_fields,
CMM_ACCESS_ONCE(session->active) = 1;
CMM_ACCESS_ONCE(session->been_active) = 1;
- session->statedump_pending = 1;
- lttng_ust_sockinfo_session_enabled(session->owner);
+ ret = lttng_session_statedump(session);
+ if (ret)
+ return ret;
end:
return ret;
}
/* Set transient enabler state to "disabled" */
session->tstate = 0;
- lttng_session_sync_enablers(session);
+ lttng_session_sync_event_enablers(session);
end:
return ret;
}
}
/* Set transient enabler state to "enabled" */
channel->tstate = 1;
- lttng_session_sync_enablers(channel->session);
+ lttng_session_sync_event_enablers(channel->session);
/* Set atomically the state to "enabled" */
CMM_ACCESS_ONCE(channel->enabled) = 1;
end:
CMM_ACCESS_ONCE(channel->enabled) = 0;
/* Set transient enabler state to "enabled" */
channel->tstate = 0;
- lttng_session_sync_enablers(channel->session);
+ lttng_session_sync_event_enablers(channel->session);
end:
return ret;
}
+static inline
+struct cds_hlist_head *borrow_hash_table_bucket(
+ struct cds_hlist_head *hash_table,
+ unsigned int hash_table_size,
+ const struct lttng_event_desc *desc)
+{
+ const char *event_name;
+ size_t name_len;
+ uint32_t hash;
+
+ event_name = desc->name;
+ name_len = strlen(event_name);
+
+ hash = jhash(event_name, name_len, 0);
+ return &hash_table[hash & (hash_table_size - 1)];
+}
+
/*
* Supports event creation while tracing session is active.
*/
int lttng_event_create(const struct lttng_event_desc *desc,
struct lttng_channel *chan)
{
- const char *event_name = desc->name;
struct lttng_event *event;
struct lttng_session *session = chan->session;
struct cds_hlist_head *head;
- struct cds_hlist_node *node;
int ret = 0;
- size_t name_len = strlen(event_name);
- uint32_t hash;
int notify_socket, loglevel;
const char *uri;
- hash = jhash(event_name, name_len, 0);
- head = &chan->session->events_ht.table[hash & (LTTNG_UST_EVENT_HT_SIZE - 1)];
- cds_hlist_for_each_entry(event, node, head, hlist) {
- assert(event->desc);
- if (!strncmp(event->desc->name, desc->name,
- LTTNG_UST_SYM_NAME_LEN - 1)
- && chan == event->chan) {
- ret = -EEXIST;
- goto exist;
- }
- }
+ head = borrow_hash_table_bucket(chan->session->events_ht.table,
+ LTTNG_UST_EVENT_HT_SIZE, desc);
notify_socket = lttng_get_notify_socket(session->owner);
if (notify_socket < 0) {
goto socket_error;
}
+ ret = lttng_create_all_event_enums(desc->nr_fields, desc->fields,
+ session);
+ if (ret < 0) {
+ DBG("Error (%d) adding enum to session", ret);
+ goto create_enum_error;
+ }
+
/*
* Check if loglevel match. Refuse to connect event if not.
*/
/* Event will be enabled by enabler sync. */
event->enabled = 0;
event->registered = 0;
- CDS_INIT_LIST_HEAD(&event->bytecode_runtime_head);
+ CDS_INIT_LIST_HEAD(&event->filter_bytecode_runtime_head);
CDS_INIT_LIST_HEAD(&event->enablers_ref_head);
event->desc = desc;
/* Fetch event ID from sessiond */
ret = ustcomm_register_event(notify_socket,
+ session,
session->objd,
chan->objd,
- event_name,
+ desc->name,
loglevel,
desc->signature,
desc->nr_fields,
goto sessiond_register_error;
}
- /* Populate lttng_event structure before tracepoint registration. */
- cmm_smp_wmb();
cds_list_add(&event->node, &chan->session->events_head);
cds_hlist_add_head(&event->hlist, head);
return 0;
sessiond_register_error:
free(event);
cache_error:
+create_enum_error:
socket_error:
-exist:
return ret;
}
static
-int lttng_desc_match_wildcard_enabler(const struct lttng_event_desc *desc,
+int lttng_event_notifier_create(const struct lttng_event_desc *desc,
+ uint64_t token,
+ struct lttng_event_notifier_group *event_notifier_group)
+{
+ struct lttng_event_notifier *event_notifier;
+ struct cds_hlist_head *head;
+ int ret = 0;
+
+ /*
+ * Get the hashtable bucket the created lttng_event_notifier object
+ * should be inserted.
+ */
+ head = borrow_hash_table_bucket(
+ event_notifier_group->event_notifiers_ht.table,
+ LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc);
+
+ event_notifier = zmalloc(sizeof(struct lttng_event_notifier));
+ if (!event_notifier) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ event_notifier->group = event_notifier_group;
+ event_notifier->user_token = token;
+
+ /* Event notifier will be enabled by enabler sync. */
+ event_notifier->enabled = 0;
+ event_notifier->registered = 0;
+
+ CDS_INIT_LIST_HEAD(&event_notifier->filter_bytecode_runtime_head);
+ CDS_INIT_LIST_HEAD(&event_notifier->enablers_ref_head);
+ event_notifier->desc = desc;
+
+ cds_list_add(&event_notifier->node,
+ &event_notifier_group->event_notifiers_head);
+ cds_hlist_add_head(&event_notifier->hlist, head);
+
+ return 0;
+
+error:
+ return ret;
+}
+
+static
+void _lttng_event_notifier_destroy(struct lttng_event_notifier *event_notifier)
+{
+ struct lttng_enabler_ref *enabler_ref, *tmp_enabler_ref;
+
+ /* Remove from event_notifier list. */
+ cds_list_del(&event_notifier->node);
+ /* Remove from event_notifier hash table. */
+ cds_hlist_del(&event_notifier->hlist);
+
+ lttng_free_event_notifier_filter_runtime(event_notifier);
+
+ /* Free event_notifier enabler refs */
+ cds_list_for_each_entry_safe(enabler_ref, tmp_enabler_ref,
+ &event_notifier->enablers_ref_head, node)
+ free(enabler_ref);
+ free(event_notifier);
+}
+
+static
+int lttng_desc_match_star_glob_enabler(const struct lttng_event_desc *desc,
struct lttng_enabler *enabler)
{
int loglevel = 0;
unsigned int has_loglevel = 0;
- assert(enabler->type == LTTNG_ENABLER_WILDCARD);
- /* Compare excluding final '*' */
- if (strncmp(desc->name, enabler->event_param.name,
- strlen(enabler->event_param.name) - 1))
+ assert(enabler->format_type == LTTNG_ENABLER_FORMAT_STAR_GLOB);
+ if (!strutils_star_glob_match(enabler->event_param.name, SIZE_MAX,
+ desc->name, SIZE_MAX))
return 0;
if (desc->loglevel) {
loglevel = *(*desc->loglevel);
int loglevel = 0;
unsigned int has_loglevel = 0;
- assert(enabler->type == LTTNG_ENABLER_EVENT);
+ assert(enabler->format_type == LTTNG_ENABLER_FORMAT_EVENT);
if (strcmp(desc->name, enabler->event_param.name))
return 0;
if (desc->loglevel) {
int lttng_desc_match_enabler(const struct lttng_event_desc *desc,
struct lttng_enabler *enabler)
{
- struct lttng_ust_excluder_node *excluder;
-
- /* If event matches with an excluder, return 'does not match' */
- cds_list_for_each_entry(excluder, &enabler->excluder_head, node) {
- int count;
-
- for (count = 0; count < excluder->excluder.count; count++) {
- int found, len;
- char *excluder_name;
-
- excluder_name = (char *) (excluder->excluder.names)
- + count * LTTNG_UST_SYM_NAME_LEN;
- len = strnlen(excluder_name, LTTNG_UST_SYM_NAME_LEN);
- if (len > 0 && excluder_name[len - 1] == '*') {
- found = !strncmp(desc->name, excluder_name,
- len - 1);
- } else {
- found = !strncmp(desc->name, excluder_name,
- LTTNG_UST_SYM_NAME_LEN - 1);
- }
- if (found) {
- return 0;
+ switch (enabler->format_type) {
+ case LTTNG_ENABLER_FORMAT_STAR_GLOB:
+ {
+ struct lttng_ust_excluder_node *excluder;
+
+ if (!lttng_desc_match_star_glob_enabler(desc, enabler)) {
+ return 0;
+ }
+
+ /*
+ * If the matching event matches with an excluder,
+ * return 'does not match'
+ */
+ cds_list_for_each_entry(excluder, &enabler->excluder_head, node) {
+ int count;
+
+ for (count = 0; count < excluder->excluder.count; count++) {
+ int len;
+ char *excluder_name;
+
+ excluder_name = (char *) (excluder->excluder.names)
+ + count * LTTNG_UST_SYM_NAME_LEN;
+ len = strnlen(excluder_name, LTTNG_UST_SYM_NAME_LEN);
+ if (len > 0 && strutils_star_glob_match(excluder_name, len, desc->name, SIZE_MAX))
+ return 0;
}
}
+ return 1;
}
- switch (enabler->type) {
- case LTTNG_ENABLER_WILDCARD:
- return lttng_desc_match_wildcard_enabler(desc, enabler);
- case LTTNG_ENABLER_EVENT:
+ case LTTNG_ENABLER_FORMAT_EVENT:
return lttng_desc_match_event_enabler(desc, enabler);
default:
return -EINVAL;
}
static
-int lttng_event_match_enabler(struct lttng_event *event,
- struct lttng_enabler *enabler)
+int lttng_event_enabler_match_event(struct lttng_event_enabler *event_enabler,
+ struct lttng_event *event)
{
- if (lttng_desc_match_enabler(event->desc, enabler)
- && event->chan == enabler->chan)
+ if (lttng_desc_match_enabler(event->desc,
+ lttng_event_enabler_as_enabler(event_enabler))
+ && event->chan == event_enabler->chan)
return 1;
else
return 0;
}
static
-struct lttng_enabler_ref * lttng_event_enabler_ref(struct lttng_event *event,
+int lttng_event_notifier_enabler_match_event_notifier(
+ struct lttng_event_notifier_enabler *event_notifier_enabler,
+ struct lttng_event_notifier *event_notifier)
+{
+ int desc_matches = lttng_desc_match_enabler(event_notifier->desc,
+ lttng_event_notifier_enabler_as_enabler(event_notifier_enabler));
+
+ if (desc_matches && event_notifier->group == event_notifier_enabler->group &&
+ event_notifier->user_token == event_notifier_enabler->user_token)
+ return 1;
+ else
+ return 0;
+}
+
+static
+struct lttng_enabler_ref *lttng_enabler_ref(
+ struct cds_list_head *enabler_ref_list,
struct lttng_enabler *enabler)
{
struct lttng_enabler_ref *enabler_ref;
- cds_list_for_each_entry(enabler_ref,
- &event->enablers_ref_head, node) {
+ cds_list_for_each_entry(enabler_ref, enabler_ref_list, node) {
if (enabler_ref->ref == enabler)
return enabler_ref;
}
* tracepoint probes.
*/
static
-void lttng_create_event_if_missing(struct lttng_enabler *enabler)
+void lttng_create_event_if_missing(struct lttng_event_enabler *event_enabler)
{
- struct lttng_session *session = enabler->chan->session;
+ struct lttng_session *session = event_enabler->chan->session;
struct lttng_probe_desc *probe_desc;
const struct lttng_event_desc *desc;
struct lttng_event *event;
*/
cds_list_for_each_entry(probe_desc, probe_list, head) {
for (i = 0; i < probe_desc->nr_events; i++) {
- int found = 0, ret;
+ int ret;
+ bool found = false;
struct cds_hlist_head *head;
struct cds_hlist_node *node;
- const char *event_name;
- size_t name_len;
- uint32_t hash;
desc = probe_desc->event_desc[i];
- if (!lttng_desc_match_enabler(desc, enabler))
+ if (!lttng_desc_match_enabler(desc,
+ lttng_event_enabler_as_enabler(event_enabler)))
continue;
- event_name = desc->name;
- name_len = strlen(event_name);
- /*
- * Check if already created.
- */
- hash = jhash(event_name, name_len, 0);
- head = &session->events_ht.table[hash & (LTTNG_UST_EVENT_HT_SIZE - 1)];
+ head = borrow_hash_table_bucket(
+ session->events_ht.table,
+ LTTNG_UST_EVENT_HT_SIZE, desc);
+
cds_hlist_for_each_entry(event, node, head, hlist) {
if (event->desc == desc
- && event->chan == enabler->chan)
- found = 1;
+ && event->chan == event_enabler->chan) {
+ found = true;
+ break;
+ }
}
if (found)
continue;
* event probe.
*/
ret = lttng_event_create(probe_desc->event_desc[i],
- enabler->chan);
+ event_enabler->chan);
if (ret) {
DBG("Unable to create event %s, error %d\n",
probe_desc->event_desc[i]->name, ret);
}
}
+static
+void probe_provider_event_for_each(struct lttng_probe_desc *provider_desc,
+ void (*event_func)(struct lttng_session *session,
+ struct lttng_event *event),
+ void (*event_notifier_func)(struct lttng_event_notifier *event_notifier))
+{
+ struct cds_hlist_node *node, *tmp_node;
+ struct cds_list_head *sessionsp;
+ unsigned int i;
+
+ /* Get handle on list of sessions. */
+ sessionsp = _lttng_get_sessions();
+
+ /*
+ * Iterate over all events in the probe provider descriptions and
+ * sessions to queue the unregistration of the events.
+ */
+ for (i = 0; i < provider_desc->nr_events; i++) {
+ const struct lttng_event_desc *event_desc;
+ struct lttng_event_notifier_group *event_notifier_group;
+ struct lttng_event_notifier *event_notifier;
+ struct lttng_session *session;
+ struct cds_hlist_head *head;
+ struct lttng_event *event;
+
+ event_desc = provider_desc->event_desc[i];
+
+ /*
+ * Iterate over all session to find the current event
+ * description.
+ */
+ cds_list_for_each_entry(session, sessionsp, node) {
+ /*
+ * Get the list of events in the hashtable bucket and
+ * iterate to find the event matching this descriptor.
+ */
+ head = borrow_hash_table_bucket(
+ session->events_ht.table,
+ LTTNG_UST_EVENT_HT_SIZE, event_desc);
+
+ cds_hlist_for_each_entry_safe(event, node, tmp_node, head, hlist) {
+ if (event_desc == event->desc) {
+ event_func(session, event);
+ break;
+ }
+ }
+ }
+
+ /*
+ * Iterate over all event_notifier groups to find the current event
+ * description.
+ */
+ cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) {
+ /*
+ * Get the list of event_notifiers in the hashtable bucket and
+ * iterate to find the event_notifier matching this
+ * descriptor.
+ */
+ head = borrow_hash_table_bucket(
+ event_notifier_group->event_notifiers_ht.table,
+ LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, event_desc);
+
+ cds_hlist_for_each_entry_safe(event_notifier, node, tmp_node, head, hlist) {
+ if (event_desc == event_notifier->desc) {
+ event_notifier_func(event_notifier);
+ break;
+ }
+ }
+ }
+ }
+}
+
+static
+void _unregister_event(struct lttng_session *session,
+ struct lttng_event *event)
+{
+ _lttng_event_unregister(event);
+}
+
+static
+void _event_enum_destroy(struct lttng_session *session,
+ struct lttng_event *event)
+{
+ unsigned int i;
+
+ /* Destroy enums of the current event. */
+ for (i = 0; i < event->desc->nr_fields; i++) {
+ const struct lttng_enum_desc *enum_desc;
+ const struct lttng_event_field *field;
+ struct lttng_enum *curr_enum;
+
+ field = &(event->desc->fields[i]);
+ switch (field->type.atype) {
+ case atype_enum:
+ enum_desc = field->type.u.legacy.basic.enumeration.desc;
+ break;
+ case atype_enum_nestable:
+ enum_desc = field->type.u.enum_nestable.desc;
+ break;
+ default:
+ continue;
+ }
+
+ curr_enum = lttng_ust_enum_get_from_desc(session, enum_desc);
+ if (curr_enum) {
+ _lttng_enum_destroy(curr_enum);
+ }
+ }
+
+ /* Destroy event. */
+ _lttng_event_destroy(event);
+}
+
+/*
+ * Iterate over all the UST sessions to unregister and destroy all probes from
+ * the probe provider descriptor received as argument. Must me called with the
+ * ust_lock held.
+ */
+void lttng_probe_provider_unregister_events(
+ struct lttng_probe_desc *provider_desc)
+{
+ /*
+ * Iterate over all events in the probe provider descriptions and sessions
+ * to queue the unregistration of the events.
+ */
+ probe_provider_event_for_each(provider_desc, _unregister_event,
+ _lttng_event_notifier_unregister);
+
+ /* Wait for grace period. */
+ synchronize_trace();
+ /* Prune the unregistration queue. */
+ __tracepoint_probe_prune_release_queue();
+
+ /*
+ * It is now safe to destroy the events and remove them from the event list
+ * and hashtables.
+ */
+ probe_provider_event_for_each(provider_desc, _event_enum_destroy,
+ _lttng_event_notifier_destroy);
+}
+
/*
- * Create events associated with an enabler (if not already present),
+ * Create events associated with an event enabler (if not already present),
* and add backward reference from the event to the enabler.
*/
static
-int lttng_enabler_ref_events(struct lttng_enabler *enabler)
+int lttng_event_enabler_ref_events(struct lttng_event_enabler *event_enabler)
{
- struct lttng_session *session = enabler->chan->session;
+ struct lttng_session *session = event_enabler->chan->session;
struct lttng_event *event;
+ if (!lttng_event_enabler_as_enabler(event_enabler)->enabled)
+ goto end;
+
/* First ensure that probe events are created for this enabler. */
- lttng_create_event_if_missing(enabler);
+ lttng_create_event_if_missing(event_enabler);
/* For each event matching enabler in session event list. */
cds_list_for_each_entry(event, &session->events_head, node) {
struct lttng_enabler_ref *enabler_ref;
- if (!lttng_event_match_enabler(event, enabler))
+ if (!lttng_event_enabler_match_event(event_enabler, event))
continue;
- enabler_ref = lttng_event_enabler_ref(event, enabler);
+ enabler_ref = lttng_enabler_ref(&event->enablers_ref_head,
+ lttng_event_enabler_as_enabler(event_enabler));
if (!enabler_ref) {
/*
* If no backward ref, create it.
enabler_ref = zmalloc(sizeof(*enabler_ref));
if (!enabler_ref)
return -ENOMEM;
- enabler_ref->ref = enabler;
+ enabler_ref->ref = lttng_event_enabler_as_enabler(
+ event_enabler);
cds_list_add(&enabler_ref->node,
&event->enablers_ref_head);
}
/*
* Link filter bytecodes if not linked yet.
*/
- lttng_enabler_event_link_bytecode(event, enabler);
+ lttng_enabler_link_bytecode(event->desc,
+ &session->ctx,
+ &event->filter_bytecode_runtime_head,
+ lttng_event_enabler_as_enabler(event_enabler));
/* TODO: merge event context. */
}
+end:
return 0;
}
struct lttng_session *session;
cds_list_for_each_entry(session, &sessions, node) {
- lttng_session_lazy_sync_enablers(session);
+ lttng_session_lazy_sync_event_enablers(session);
+ }
+ return 0;
+}
+
+int lttng_fix_pending_event_notifiers(void)
+{
+ struct lttng_event_notifier_group *event_notifier_group;
+
+ cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) {
+ lttng_event_notifier_group_sync_enablers(event_notifier_group);
}
return 0;
}
* Only dump state for the sessions owned by the caller thread, because
* we don't keep ust_lock across the entire iteration.
*/
-int lttng_handle_pending_statedump(void *owner)
+void lttng_handle_pending_statedump(void *owner)
{
struct lttng_session *session;
/* Execute state dump */
- lttng_ust_baddr_statedump(owner);
+ do_lttng_ust_statedump(owner);
/* Clear pending state dump */
- ust_lock();
+ if (ust_lock()) {
+ goto end;
+ }
cds_list_for_each_entry(session, &sessions, node) {
if (session->owner != owner)
continue;
continue;
session->statedump_pending = 0;
}
+end:
ust_unlock();
- return 0;
+ return;
}
/*
{
struct lttng_enabler_ref *enabler_ref, *tmp_enabler_ref;
+ /* Remove from event list. */
cds_list_del(&event->node);
+ /* Remove from event hash table. */
+ cds_hlist_del(&event->hlist);
+
lttng_destroy_context(event->ctx);
lttng_free_event_filter_runtime(event);
/* Free event enabler refs */
free(event);
}
+static
+void _lttng_enum_destroy(struct lttng_enum *_enum)
+{
+ cds_list_del(&_enum->node);
+ cds_hlist_del(&_enum->hlist);
+ free(_enum);
+}
+
void lttng_ust_events_exit(void)
{
struct lttng_session *session, *tmpsession;
/*
* Enabler management.
*/
-struct lttng_enabler *lttng_enabler_create(enum lttng_enabler_type type,
+struct lttng_event_enabler *lttng_event_enabler_create(
+ enum lttng_enabler_format_type format_type,
struct lttng_ust_event *event_param,
struct lttng_channel *chan)
{
- struct lttng_enabler *enabler;
+ struct lttng_event_enabler *event_enabler;
- enabler = zmalloc(sizeof(*enabler));
- if (!enabler)
+ event_enabler = zmalloc(sizeof(*event_enabler));
+ if (!event_enabler)
return NULL;
- enabler->type = type;
- CDS_INIT_LIST_HEAD(&enabler->filter_bytecode_head);
- CDS_INIT_LIST_HEAD(&enabler->excluder_head);
- memcpy(&enabler->event_param, event_param,
- sizeof(enabler->event_param));
- enabler->chan = chan;
+ event_enabler->base.format_type = format_type;
+ CDS_INIT_LIST_HEAD(&event_enabler->base.filter_bytecode_head);
+ CDS_INIT_LIST_HEAD(&event_enabler->base.excluder_head);
+ memcpy(&event_enabler->base.event_param, event_param,
+ sizeof(event_enabler->base.event_param));
+ event_enabler->chan = chan;
/* ctx left NULL */
- enabler->enabled = 1;
- cds_list_add(&enabler->node, &enabler->chan->session->enablers_head);
- lttng_session_lazy_sync_enablers(enabler->chan->session);
- return enabler;
+ event_enabler->base.enabled = 0;
+ cds_list_add(&event_enabler->node, &event_enabler->chan->session->enablers_head);
+ lttng_session_lazy_sync_event_enablers(event_enabler->chan->session);
+
+ return event_enabler;
}
-int lttng_enabler_enable(struct lttng_enabler *enabler)
+struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create(
+ struct lttng_event_notifier_group *event_notifier_group,
+ enum lttng_enabler_format_type format_type,
+ struct lttng_ust_event_notifier *event_notifier_param)
{
- enabler->enabled = 1;
- lttng_session_lazy_sync_enablers(enabler->chan->session);
+ struct lttng_event_notifier_enabler *event_notifier_enabler;
+
+ event_notifier_enabler = zmalloc(sizeof(*event_notifier_enabler));
+ if (!event_notifier_enabler)
+ return NULL;
+ event_notifier_enabler->base.format_type = format_type;
+ CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.filter_bytecode_head);
+ CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.excluder_head);
+
+ event_notifier_enabler->user_token = event_notifier_param->event.token;
+
+ memcpy(&event_notifier_enabler->base.event_param.name,
+ event_notifier_param->event.name,
+ sizeof(event_notifier_enabler->base.event_param.name));
+ event_notifier_enabler->base.event_param.instrumentation =
+ event_notifier_param->event.instrumentation;
+ event_notifier_enabler->base.event_param.loglevel =
+ event_notifier_param->event.loglevel;
+ event_notifier_enabler->base.event_param.loglevel_type =
+ event_notifier_param->event.loglevel_type;
+
+ event_notifier_enabler->base.enabled = 0;
+ event_notifier_enabler->group = event_notifier_group;
+
+ cds_list_add(&event_notifier_enabler->node,
+ &event_notifier_group->enablers_head);
+
+ lttng_event_notifier_group_sync_enablers(event_notifier_group);
+
+ return event_notifier_enabler;
+}
+
+int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler)
+{
+ lttng_event_enabler_as_enabler(event_enabler)->enabled = 1;
+ lttng_session_lazy_sync_event_enablers(event_enabler->chan->session);
+
return 0;
}
-int lttng_enabler_disable(struct lttng_enabler *enabler)
+int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler)
{
- enabler->enabled = 0;
- lttng_session_lazy_sync_enablers(enabler->chan->session);
+ lttng_event_enabler_as_enabler(event_enabler)->enabled = 0;
+ lttng_session_lazy_sync_event_enablers(event_enabler->chan->session);
+
return 0;
}
-int lttng_enabler_attach_bytecode(struct lttng_enabler *enabler,
- struct lttng_ust_filter_bytecode_node *bytecode)
+static
+void _lttng_enabler_attach_filter_bytecode(struct lttng_enabler *enabler,
+ struct lttng_ust_bytecode_node *bytecode)
{
bytecode->enabler = enabler;
cds_list_add_tail(&bytecode->node, &enabler->filter_bytecode_head);
- lttng_session_lazy_sync_enablers(enabler->chan->session);
+}
+
+int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler,
+ struct lttng_ust_bytecode_node *bytecode)
+{
+ _lttng_enabler_attach_filter_bytecode(
+ lttng_event_enabler_as_enabler(event_enabler), bytecode);
+
+ lttng_session_lazy_sync_event_enablers(event_enabler->chan->session);
return 0;
}
-int lttng_enabler_attach_exclusion(struct lttng_enabler *enabler,
+static
+void _lttng_enabler_attach_exclusion(struct lttng_enabler *enabler,
struct lttng_ust_excluder_node *excluder)
{
excluder->enabler = enabler;
cds_list_add_tail(&excluder->node, &enabler->excluder_head);
- lttng_session_lazy_sync_enablers(enabler->chan->session);
+}
+
+int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *event_enabler,
+ struct lttng_ust_excluder_node *excluder)
+{
+ _lttng_enabler_attach_exclusion(
+ lttng_event_enabler_as_enabler(event_enabler), excluder);
+
+ lttng_session_lazy_sync_event_enablers(event_enabler->chan->session);
+ return 0;
+}
+
+int lttng_event_notifier_enabler_enable(
+ struct lttng_event_notifier_enabler *event_notifier_enabler)
+{
+ lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 1;
+ lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group);
+
+ return 0;
+}
+
+int lttng_event_notifier_enabler_disable(
+ struct lttng_event_notifier_enabler *event_notifier_enabler)
+{
+ lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 0;
+ lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group);
+
+ return 0;
+}
+
+int lttng_event_notifier_enabler_attach_filter_bytecode(
+ struct lttng_event_notifier_enabler *event_notifier_enabler,
+ struct lttng_ust_bytecode_node *bytecode)
+{
+ _lttng_enabler_attach_filter_bytecode(
+ lttng_event_notifier_enabler_as_enabler(event_notifier_enabler),
+ bytecode);
+
+ lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group);
+ return 0;
+}
+
+int lttng_event_notifier_enabler_attach_exclusion(
+ struct lttng_event_notifier_enabler *event_notifier_enabler,
+ struct lttng_ust_excluder_node *excluder)
+{
+ _lttng_enabler_attach_exclusion(
+ lttng_event_notifier_enabler_as_enabler(event_notifier_enabler),
+ excluder);
+
+ lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group);
return 0;
}
int lttng_attach_context(struct lttng_ust_context *context_param,
+ union ust_args *uargs,
struct lttng_ctx **ctx, struct lttng_session *session)
{
/*
switch (context_param->ctx) {
case LTTNG_UST_CONTEXT_PTHREAD_ID:
return lttng_add_pthread_id_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER:
+ {
+ struct lttng_ust_perf_counter_ctx *perf_ctx_param;
+
+ perf_ctx_param = &context_param->u.perf_counter;
+ return lttng_add_perf_counter_to_ctx(
+ perf_ctx_param->type,
+ perf_ctx_param->config,
+ perf_ctx_param->name,
+ ctx);
+ }
case LTTNG_UST_CONTEXT_VTID:
return lttng_add_vtid_to_ctx(ctx);
case LTTNG_UST_CONTEXT_VPID:
return lttng_add_procname_to_ctx(ctx);
case LTTNG_UST_CONTEXT_IP:
return lttng_add_ip_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_CPU_ID:
+ return lttng_add_cpu_id_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_APP_CONTEXT:
+ return lttng_ust_add_app_context_to_ctx_rcu(uargs->app_context.ctxname,
+ ctx);
+ case LTTNG_UST_CONTEXT_CGROUP_NS:
+ return lttng_add_cgroup_ns_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_IPC_NS:
+ return lttng_add_ipc_ns_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_MNT_NS:
+ return lttng_add_mnt_ns_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_NET_NS:
+ return lttng_add_net_ns_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_PID_NS:
+ return lttng_add_pid_ns_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_TIME_NS:
+ return lttng_add_time_ns_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_USER_NS:
+ return lttng_add_user_ns_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_UTS_NS:
+ return lttng_add_uts_ns_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_VUID:
+ return lttng_add_vuid_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_VEUID:
+ return lttng_add_veuid_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_VSUID:
+ return lttng_add_vsuid_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_VGID:
+ return lttng_add_vgid_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_VEGID:
+ return lttng_add_vegid_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_VSGID:
+ return lttng_add_vsgid_to_ctx(ctx);
default:
return -EINVAL;
}
}
-int lttng_enabler_attach_context(struct lttng_enabler *enabler,
+int lttng_event_enabler_attach_context(struct lttng_event_enabler *enabler,
struct lttng_ust_context *context_param)
{
-#if 0 // disabled for now.
- struct lttng_session *session = enabler->chan->session;
- int ret;
-
- ret = lttng_attach_context(context_param, &enabler->ctx,
- session);
- if (ret)
- return ret;
- lttng_session_lazy_sync_enablers(enabler->chan->session);
-#endif
return -ENOSYS;
}
-static
-void lttng_enabler_destroy(struct lttng_enabler *enabler)
+void lttng_event_enabler_destroy(struct lttng_event_enabler *event_enabler)
{
- struct lttng_ust_filter_bytecode_node *filter_node, *tmp_filter_node;
- struct lttng_ust_excluder_node *excluder_node, *tmp_excluder_node;
-
- /* Destroy filter bytecode */
- cds_list_for_each_entry_safe(filter_node, tmp_filter_node,
- &enabler->filter_bytecode_head, node) {
- free(filter_node);
- }
-
- /* Destroy excluders */
- cds_list_for_each_entry_safe(excluder_node, tmp_excluder_node,
- &enabler->excluder_head, node) {
- free(excluder_node);
+ if (!event_enabler) {
+ return;
}
+ cds_list_del(&event_enabler->node);
- /* Destroy contexts */
- lttng_destroy_context(enabler->ctx);
+ lttng_enabler_destroy(lttng_event_enabler_as_enabler(event_enabler));
- cds_list_del(&enabler->node);
- free(enabler);
+ lttng_destroy_context(event_enabler->ctx);
+ free(event_enabler);
}
/*
- * lttng_session_sync_enablers should be called just before starting a
+ * lttng_session_sync_event_enablers should be called just before starting a
* session.
*/
static
-void lttng_session_sync_enablers(struct lttng_session *session)
+void lttng_session_sync_event_enablers(struct lttng_session *session)
{
- struct lttng_enabler *enabler;
+ struct lttng_event_enabler *event_enabler;
struct lttng_event *event;
- cds_list_for_each_entry(enabler, &session->enablers_head, node)
- lttng_enabler_ref_events(enabler);
+ cds_list_for_each_entry(event_enabler, &session->enablers_head, node)
+ lttng_event_enabler_ref_events(event_enabler);
/*
* For each event, if at least one of its enablers is enabled,
* and its channel and session transient states are enabled, we
/* Enable filters */
cds_list_for_each_entry(runtime,
- &event->bytecode_runtime_head, node) {
- lttng_filter_sync_state(runtime);
+ &event->filter_bytecode_runtime_head, node) {
+ lttng_bytecode_filter_sync_state(runtime);
+ }
+ }
+ __tracepoint_probe_prune_release_queue();
+}
+
+static
+void lttng_create_event_notifier_if_missing(
+ struct lttng_event_notifier_enabler *event_notifier_enabler)
+{
+ struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group;
+ struct lttng_probe_desc *probe_desc;
+ struct cds_list_head *probe_list;
+ int i;
+
+ probe_list = lttng_get_probe_list_head();
+
+ cds_list_for_each_entry(probe_desc, probe_list, head) {
+ for (i = 0; i < probe_desc->nr_events; i++) {
+ int ret;
+ bool found = false;
+ const struct lttng_event_desc *desc;
+ struct lttng_event_notifier *event_notifier;
+ struct cds_hlist_head *head;
+ struct cds_hlist_node *node;
+
+ desc = probe_desc->event_desc[i];
+ if (!lttng_desc_match_enabler(desc,
+ lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)))
+ continue;
+
+ /*
+ * Given the current event_notifier group, get the bucket that
+ * the target event_notifier would be if it was already
+ * created.
+ */
+ head = borrow_hash_table_bucket(
+ event_notifier_group->event_notifiers_ht.table,
+ LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc);
+
+ cds_hlist_for_each_entry(event_notifier, node, head, hlist) {
+ /*
+ * Check if event_notifier already exists by checking
+ * if the event_notifier and enabler share the same
+ * description and id.
+ */
+ if (event_notifier->desc == desc &&
+ event_notifier->user_token == event_notifier_enabler->user_token) {
+ found = true;
+ break;
+ }
+ }
+
+ if (found)
+ continue;
+
+ /*
+ * We need to create a event_notifier for this event probe.
+ */
+ ret = lttng_event_notifier_create(desc,
+ event_notifier_enabler->user_token,
+ event_notifier_group);
+ if (ret) {
+ DBG("Unable to create event_notifier %s, error %d\n",
+ probe_desc->event_desc[i]->name, ret);
+ }
+ }
+ }
+}
+
+/*
+ * Create event_notifiers associated with a event_notifier enabler (if not already present).
+ */
+static
+int lttng_event_notifier_enabler_ref_event_notifiers(
+ struct lttng_event_notifier_enabler *event_notifier_enabler)
+{
+ struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group;
+ struct lttng_event_notifier *event_notifier;
+
+ /*
+ * Only try to create event_notifiers for enablers that are enabled, the user
+ * might still be attaching filter or exclusion to the
+ * event_notifier_enabler.
+ */
+ if (!lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled)
+ goto end;
+
+ /* First, ensure that probe event_notifiers are created for this enabler. */
+ lttng_create_event_notifier_if_missing(event_notifier_enabler);
+
+ /* Link the created event_notifier with its associated enabler. */
+ cds_list_for_each_entry(event_notifier, &event_notifier_group->event_notifiers_head, node) {
+ struct lttng_enabler_ref *enabler_ref;
+
+ if (!lttng_event_notifier_enabler_match_event_notifier(event_notifier_enabler, event_notifier))
+ continue;
+
+ enabler_ref = lttng_enabler_ref(&event_notifier->enablers_ref_head,
+ lttng_event_notifier_enabler_as_enabler(event_notifier_enabler));
+ if (!enabler_ref) {
+ /*
+ * If no backward ref, create it.
+ * Add backward ref from event_notifier to enabler.
+ */
+ enabler_ref = zmalloc(sizeof(*enabler_ref));
+ if (!enabler_ref)
+ return -ENOMEM;
+
+ enabler_ref->ref = lttng_event_notifier_enabler_as_enabler(
+ event_notifier_enabler);
+ cds_list_add(&enabler_ref->node,
+ &event_notifier->enablers_ref_head);
+ }
+
+ /*
+ * Link filter bytecodes if not linked yet.
+ */
+ lttng_enabler_link_bytecode(event_notifier->desc,
+ &event_notifier_group->ctx, &event_notifier->filter_bytecode_runtime_head,
+ lttng_event_notifier_enabler_as_enabler(event_notifier_enabler));
+ }
+end:
+ return 0;
+}
+
+static
+void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group *event_notifier_group)
+{
+ struct lttng_event_notifier_enabler *event_notifier_enabler;
+ struct lttng_event_notifier *event_notifier;
+
+ cds_list_for_each_entry(event_notifier_enabler, &event_notifier_group->enablers_head, node)
+ lttng_event_notifier_enabler_ref_event_notifiers(event_notifier_enabler);
+
+ /*
+ * For each event_notifier, if at least one of its enablers is enabled,
+ * we enable the event_notifier, else we disable it.
+ */
+ cds_list_for_each_entry(event_notifier, &event_notifier_group->event_notifiers_head, node) {
+ struct lttng_enabler_ref *enabler_ref;
+ struct lttng_bytecode_runtime *runtime;
+ int enabled = 0, has_enablers_without_bytecode = 0;
+
+ /* Enable event_notifiers */
+ cds_list_for_each_entry(enabler_ref,
+ &event_notifier->enablers_ref_head, node) {
+ if (enabler_ref->ref->enabled) {
+ enabled = 1;
+ break;
+ }
+ }
+
+ CMM_STORE_SHARED(event_notifier->enabled, enabled);
+ /*
+ * Sync tracepoint registration with event_notifier enabled
+ * state.
+ */
+ if (enabled) {
+ if (!event_notifier->registered)
+ register_event_notifier(event_notifier);
+ } else {
+ if (event_notifier->registered)
+ unregister_event_notifier(event_notifier);
+ }
+
+ /* Check if has enablers without bytecode enabled */
+ cds_list_for_each_entry(enabler_ref,
+ &event_notifier->enablers_ref_head, node) {
+ if (enabler_ref->ref->enabled
+ && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) {
+ has_enablers_without_bytecode = 1;
+ break;
+ }
+ }
+ event_notifier->has_enablers_without_bytecode =
+ has_enablers_without_bytecode;
+
+ /* Enable filters */
+ cds_list_for_each_entry(runtime,
+ &event_notifier->filter_bytecode_runtime_head, node) {
+ lttng_bytecode_filter_sync_state(runtime);
}
}
+ __tracepoint_probe_prune_release_queue();
}
/*
* "lazy" sync means we only sync if required.
*/
static
-void lttng_session_lazy_sync_enablers(struct lttng_session *session)
+void lttng_session_lazy_sync_event_enablers(struct lttng_session *session)
{
/* We can skip if session is not active */
if (!session->active)
return;
- lttng_session_sync_enablers(session);
+ lttng_session_sync_event_enablers(session);
+}
+
+/*
+ * Update all sessions with the given app context.
+ * Called with ust lock held.
+ * This is invoked when an application context gets loaded/unloaded. It
+ * ensures the context callbacks are in sync with the application
+ * context (either app context callbacks, or dummy callbacks).
+ */
+void lttng_ust_context_set_session_provider(const char *name,
+ size_t (*get_size)(struct lttng_ctx_field *field, size_t offset),
+ void (*record)(struct lttng_ctx_field *field,
+ struct lttng_ust_lib_ring_buffer_ctx *ctx,
+ struct lttng_channel *chan),
+ void (*get_value)(struct lttng_ctx_field *field,
+ struct lttng_ctx_value *value))
+{
+ struct lttng_session *session;
+
+ cds_list_for_each_entry(session, &sessions, node) {
+ struct lttng_channel *chan;
+ struct lttng_event *event;
+ int ret;
+
+ ret = lttng_ust_context_set_provider_rcu(&session->ctx,
+ name, get_size, record, get_value);
+ if (ret)
+ abort();
+ cds_list_for_each_entry(chan, &session->chan_head, node) {
+ ret = lttng_ust_context_set_provider_rcu(&chan->ctx,
+ name, get_size, record, get_value);
+ if (ret)
+ abort();
+ }
+ cds_list_for_each_entry(event, &session->events_head, node) {
+ ret = lttng_ust_context_set_provider_rcu(&event->ctx,
+ name, get_size, record, get_value);
+ if (ret)
+ abort();
+ }
+ }
+}
+
+/*
+ * Update all event_notifier groups with the given app context.
+ * Called with ust lock held.
+ * This is invoked when an application context gets loaded/unloaded. It
+ * ensures the context callbacks are in sync with the application
+ * context (either app context callbacks, or dummy callbacks).
+ */
+void lttng_ust_context_set_event_notifier_group_provider(const char *name,
+ size_t (*get_size)(struct lttng_ctx_field *field, size_t offset),
+ void (*record)(struct lttng_ctx_field *field,
+ struct lttng_ust_lib_ring_buffer_ctx *ctx,
+ struct lttng_channel *chan),
+ void (*get_value)(struct lttng_ctx_field *field,
+ struct lttng_ctx_value *value))
+{
+ struct lttng_event_notifier_group *event_notifier_group;
+
+ cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) {
+ int ret;
+
+ ret = lttng_ust_context_set_provider_rcu(
+ &event_notifier_group->ctx,
+ name, get_size, record, get_value);
+ if (ret)
+ abort();
+ }
}