*/
#define _GNU_SOURCE
+#define _LGPL_SOURCE
#include <stdio.h>
#include <urcu/list.h>
#include <urcu/hlist.h>
#include <stddef.h>
#include <inttypes.h>
#include <time.h>
+#include <stdbool.h>
#include <lttng/ust-endian.h>
#include "clock.h"
#include <helper.h>
#include <lttng/ust-ctl.h>
#include <ust-comm.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-tracer.h"
#include "lttng-tracer-core.h"
-#include "lttng-ust-baddr.h"
+#include "lttng-ust-statedump.h"
#include "wait.h"
#include "../libringbuffer/shm.h"
#include "jhash.h"
}
static void _lttng_event_destroy(struct lttng_event *event);
+static void _lttng_enum_destroy(struct lttng_enum *_enum);
static
void lttng_session_lazy_sync_enablers(struct lttng_session *session);
switch (req_type) {
case LTTNG_UST_LOGLEVEL_RANGE:
if (loglevel <= req_loglevel
- || (req_loglevel == -1 && loglevel <= TRACE_DEFAULT))
+ || (req_loglevel == -1 && loglevel <= TRACE_DEBUG))
return 1;
else
return 0;
case LTTNG_UST_LOGLEVEL_SINGLE:
if (loglevel == req_loglevel
- || (req_loglevel == -1 && loglevel <= TRACE_DEFAULT))
+ || (req_loglevel == -1 && loglevel <= TRACE_DEBUG))
return 1;
else
return 0;
case LTTNG_UST_LOGLEVEL_ALL:
default:
- if (loglevel <= TRACE_DEFAULT)
+ 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;
}
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);
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);
{
struct lttng_channel *chan, *tmpchan;
struct lttng_event *event, *tmpevent;
+ struct lttng_enum *_enum, *tmp_enum;
struct lttng_enabler *enabler, *tmpenabler;
CMM_ACCESS_ONCE(session->active) = 0;
_lttng_event_unregister(event);
}
synchronize_trace(); /* Wait for in-flight events to complete */
+ __tracepoint_probe_prune_release_queue();
cds_list_for_each_entry_safe(enabler, tmpenabler,
&session->enablers_head, node)
lttng_enabler_destroy(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);
}
+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.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_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.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;
+ }
+ 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);
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;
}
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;
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;
- }
- }
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.
*/
/* Fetch event ID from sessiond */
ret = ustcomm_register_event(notify_socket,
+ session,
session->objd,
chan->objd,
event_name,
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_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->type == LTTNG_ENABLER_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 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->type) {
+ case LTTNG_ENABLER_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:
return lttng_desc_match_event_enabler(desc, enabler);
default:
}
}
+/*
+ * 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)
+{
+ struct cds_hlist_node *node, *tmp_node;
+ struct cds_list_head *sessionsp;
+ struct lttng_session *session;
+ struct cds_hlist_head *head;
+ struct lttng_event *event;
+ unsigned int i, j;
+
+ /* 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;
+ const char *event_name;
+ size_t name_len;
+ uint32_t hash;
+
+ event_desc = provider_desc->event_desc[i];
+ event_name = event_desc->name;
+ name_len = strlen(event_name);
+ hash = jhash(event_name, name_len, 0);
+
+ /* 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 = &session->events_ht.table[hash & (LTTNG_UST_EVENT_HT_SIZE - 1)];
+ cds_hlist_for_each_entry(event, node, head, hlist) {
+ if (event_desc == event->desc) {
+ /* Queue the unregistration of this event. */
+ _lttng_event_unregister(event);
+ break;
+ }
+ }
+ }
+ }
+
+ /* 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.
+ */
+ for (i = 0; i < provider_desc->nr_events; i++) {
+ const struct lttng_event_desc *event_desc;
+ const char *event_name;
+ size_t name_len;
+ uint32_t hash;
+
+ event_desc = provider_desc->event_desc[i];
+ event_name = event_desc->name;
+ name_len = strlen(event_name);
+ hash = jhash(event_name, name_len, 0);
+
+ /* Iterate over all sessions 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 = &session->events_ht.table[hash & (LTTNG_UST_EVENT_HT_SIZE - 1)];
+ cds_hlist_for_each_entry_safe(event, node, tmp_node, head, hlist) {
+ if (event_desc == event->desc) {
+ /* Destroy enums of the current event. */
+ for (j = 0; j < event->desc->nr_fields; j++) {
+ const struct lttng_enum_desc *enum_desc;
+ const struct lttng_event_field *field;
+ struct lttng_enum *curr_enum;
+
+ field = &(event->desc->fields[j]);
+ if (field->type.atype != atype_enum) {
+ continue;
+ }
+
+ enum_desc = field->type.u.basic.enumeration.desc;
+ 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);
+ break;
+ }
+ }
+ }
+ }
+}
+
/*
* Create events associated with an enabler (if not already present),
* and add backward reference from the event to the enabler.
struct lttng_session *session;
/* Execute state dump */
- lttng_ust_baddr_statedump(owner);
+ do_lttng_ust_statedump(owner);
/* Clear pending state dump */
if (ust_lock()) {
{
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;
sizeof(enabler->event_param));
enabler->chan = chan;
/* ctx left NULL */
- enabler->enabled = 1;
+ enabler->enabled = 0;
cds_list_add(&enabler->node, &enabler->chan->session->enablers_head);
lttng_session_lazy_sync_enablers(enabler->chan->session);
return enabler;
}
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);
default:
return -EINVAL;
}
lttng_filter_sync_state(runtime);
}
}
+ __tracepoint_probe_prune_release_queue();
}
/*
return;
lttng_session_sync_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();
+ }
+ }
+}
projects / lttng-ust.git / blobdiff