* Supports event creation while tracing session is active.
* Needs to be called with sessions mutex held.
*/
-static
-struct lttng_kernel_event_recorder *_lttng_kernel_event_recorder_create(struct lttng_event_recorder_enabler *event_enabler,
+struct lttng_kernel_event_common *_lttng_kernel_event_create(struct lttng_event_enabler_common *event_enabler,
const struct lttng_kernel_event_desc *event_desc)
{
- struct lttng_event_ht *events_ht = lttng_get_event_ht_from_enabler(&event_enabler->parent);
- struct list_head *event_list_head = lttng_get_event_list_head_from_enabler(&event_enabler->parent);
- struct lttng_kernel_abi_event *event_param = &event_enabler->parent.event_param;
+ struct lttng_event_ht *events_ht = lttng_get_event_ht_from_enabler(event_enabler);
+ struct list_head *event_list_head = lttng_get_event_list_head_from_enabler(event_enabler);
+ struct lttng_kernel_abi_event *event_param = &event_enabler->event_param;
enum lttng_kernel_abi_instrumentation itype = event_param->instrumentation;
struct lttng_kernel_event_common_private *event_priv;
struct lttng_kernel_event_common *event;
- struct lttng_kernel_event_recorder *event_recorder;
const char *event_name;
struct hlist_head *head;
int ret;
- if (!lttng_kernel_event_id_available(&event_enabler->parent)) {
+ if (!lttng_kernel_event_id_available(event_enabler)) {
ret = -EMFILE;
goto full;
}
head = utils_borrow_hash_table_bucket(events_ht->table, LTTNG_EVENT_HT_SIZE, event_name);
lttng_hlist_for_each_entry(event_priv, head, hlist_node) {
- if (lttng_event_enabler_event_name_match_event(&event_enabler->parent, event_name, event_priv->pub)) {
+ if (lttng_event_enabler_event_name_match_event(event_enabler, event_name, event_priv->pub)) {
ret = -EEXIST;
goto exist;
}
}
- event = lttng_kernel_event_alloc(&event_enabler->parent);
+ event = lttng_kernel_event_alloc(event_enabler);
if (!event) {
ret = -ENOMEM;
goto alloc_error;
}
- event_recorder = container_of(event, struct lttng_kernel_event_recorder, parent);
switch (itype) {
case LTTNG_KERNEL_ABI_TRACEPOINT:
event->enabled = 0;
event->priv->registered = 1;
- event_return = lttng_kernel_event_alloc(&event_enabler->parent);
+ event_return = lttng_kernel_event_alloc(event_enabler);
if (!event) {
ret = -ENOMEM;
goto alloc_error;
ret = -EINVAL;
goto register_error;
}
+
ret = _lttng_event_recorder_metadata_statedump(event);
WARN_ON_ONCE(ret > 0);
if (ret) {
goto statedump_error;
}
- hlist_add_head(&event->priv->hlist_node, head);
- list_add(&event->priv->node, event_list_head);
- return event_recorder;
-
-statedump_error:
- /* If a statedump error occurs, events will not be readable. */
-register_error:
- lttng_kernel_event_free(event);
-alloc_error:
-exist:
-type_error:
-full:
- return ERR_PTR(ret);
-}
-
-static
-struct lttng_kernel_event_notifier *_lttng_kernel_event_notifier_create(struct lttng_event_notifier_enabler *event_enabler,
- const struct lttng_kernel_event_desc *event_desc)
-{
- struct lttng_event_ht *events_ht = lttng_get_event_ht_from_enabler(&event_enabler->parent);
- struct list_head *event_list_head = lttng_get_event_list_head_from_enabler(&event_enabler->parent);
- struct lttng_kernel_abi_event *event_param = &event_enabler->parent.event_param;
- enum lttng_kernel_abi_instrumentation itype = event_param->instrumentation;
- struct lttng_kernel_event_common_private *event_priv;
- struct lttng_kernel_event_common *event;
- struct lttng_kernel_event_notifier *event_notifier;
- const char *event_name;
- struct hlist_head *head;
- int ret;
-
- switch (itype) {
- case LTTNG_KERNEL_ABI_TRACEPOINT:
- event_name = event_desc->event_name;
- break;
-
- case LTTNG_KERNEL_ABI_KPROBE:
- lttng_fallthrough;
- case LTTNG_KERNEL_ABI_UPROBE:
- lttng_fallthrough;
- case LTTNG_KERNEL_ABI_SYSCALL:
- event_name = event_param->name;
- break;
-
- case LTTNG_KERNEL_ABI_KRETPROBE:
- lttng_fallthrough;
- case LTTNG_KERNEL_ABI_FUNCTION:
- lttng_fallthrough;
- case LTTNG_KERNEL_ABI_NOOP:
- lttng_fallthrough;
- default:
- WARN_ON_ONCE(1);
- ret = -EINVAL;
- goto type_error;
- }
-
- head = utils_borrow_hash_table_bucket(events_ht->table, LTTNG_EVENT_HT_SIZE, event_name);
- lttng_hlist_for_each_entry(event_priv, head, hlist_node) {
- if (lttng_event_enabler_event_name_match_event(&event_enabler->parent, event_name, event_priv->pub)) {
- ret = -EEXIST;
- goto exist;
- }
- }
-
- event = lttng_kernel_event_alloc(&event_enabler->parent);
- if (!event) {
- ret = -ENOMEM;
- goto alloc_error;
- }
- event_notifier = container_of(event, struct lttng_kernel_event_notifier, parent);
-
- switch (itype) {
- case LTTNG_KERNEL_ABI_TRACEPOINT:
- /* Event will be enabled by enabler sync. */
- event->enabled = 0;
- event->priv->registered = 0;
- event->priv->desc = lttng_event_desc_get(event_name);
- if (!event->priv->desc) {
- ret = -ENOENT;
- goto register_error;
- }
- /* Populate lttng_event_notifier structure before event registration. */
- smp_wmb();
- break;
-
- case LTTNG_KERNEL_ABI_KPROBE:
- /*
- * Needs to be explicitly enabled after creation, since
- * we may want to apply filters.
- */
- event->enabled = 0;
- event->priv->registered = 1;
- /*
- * Populate lttng_event_notifier structure before event
- * registration.
- */
- smp_wmb();
- ret = lttng_kprobes_register_event(event_param->u.kprobe.symbol_name,
- event_param->u.kprobe.symbol_name,
- event_param->u.kprobe.offset,
- event_param->u.kprobe.addr,
- event);
- if (ret) {
- ret = -EINVAL;
- goto register_error;
- }
- ret = try_module_get(event->priv->desc->owner);
- WARN_ON_ONCE(!ret);
- break;
-
- case LTTNG_KERNEL_ABI_SYSCALL:
- /*
- * Needs to be explicitly enabled after creation, since
- * we may want to apply filters.
- */
- event->enabled = 0;
- event->priv->registered = 0;
- event->priv->desc = event_desc;
- switch (event_param->u.syscall.entryexit) {
- case LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT:
- ret = -EINVAL;
- goto register_error;
- case LTTNG_KERNEL_ABI_SYSCALL_ENTRY:
- event->priv->u.syscall.entryexit = LTTNG_SYSCALL_ENTRY;
- break;
- case LTTNG_KERNEL_ABI_SYSCALL_EXIT:
- event->priv->u.syscall.entryexit = LTTNG_SYSCALL_EXIT;
- break;
- }
- switch (event_param->u.syscall.abi) {
- case LTTNG_KERNEL_ABI_SYSCALL_ABI_ALL:
- ret = -EINVAL;
- goto register_error;
- case LTTNG_KERNEL_ABI_SYSCALL_ABI_NATIVE:
- event->priv->u.syscall.abi = LTTNG_SYSCALL_ABI_NATIVE;
- break;
- case LTTNG_KERNEL_ABI_SYSCALL_ABI_COMPAT:
- event->priv->u.syscall.abi = LTTNG_SYSCALL_ABI_COMPAT;
- break;
- }
-
- if (!event->priv->desc) {
- ret = -EINVAL;
- goto register_error;
- }
- break;
-
- case LTTNG_KERNEL_ABI_UPROBE:
- /*
- * Needs to be explicitly enabled after creation, since
- * we may want to apply filters.
- */
- event->enabled = 0;
- event->priv->registered = 1;
-
- /*
- * Populate lttng_event_notifier structure before
- * event_notifier registration.
- */
- smp_wmb();
-
- ret = lttng_uprobes_register_event(event_param->name,
- event_param->u.uprobe.fd,
- event);
- if (ret)
- goto register_error;
- ret = try_module_get(event->priv->desc->owner);
- WARN_ON_ONCE(!ret);
- break;
-
- case LTTNG_KERNEL_ABI_KRETPROBE:
- lttng_fallthrough;
- case LTTNG_KERNEL_ABI_FUNCTION:
- lttng_fallthrough;
- case LTTNG_KERNEL_ABI_NOOP:
- lttng_fallthrough;
- default:
- WARN_ON_ONCE(1);
- ret = -EINVAL;
- goto register_error;
- }
ret = lttng_kernel_event_notifier_clear_error_counter(event);
if (ret)
goto register_error;
- list_add(&event->priv->node, event_list_head);
hlist_add_head(&event->priv->hlist_node, head);
+ list_add(&event->priv->node, event_list_head);
- return event_notifier;
+ return event;
+statedump_error:
+ /* If a statedump error occurs, events will not be readable. */
register_error:
lttng_kernel_event_free(event);
alloc_error:
exist:
type_error:
+full:
return ERR_PTR(ret);
}
-struct lttng_kernel_event_common *_lttng_kernel_event_create(struct lttng_event_enabler_common *event_enabler,
- const struct lttng_kernel_event_desc *event_desc)
-{
- switch (event_enabler->enabler_type) {
- case LTTNG_EVENT_ENABLER_TYPE_RECORDER:
- {
- struct lttng_event_recorder_enabler *event_recorder_enabler =
- container_of(event_enabler, struct lttng_event_recorder_enabler, parent);
- struct lttng_kernel_event_recorder *event_recorder;
-
- event_recorder = _lttng_kernel_event_recorder_create(event_recorder_enabler, event_desc);
- if (!event_recorder)
- return NULL;
- return &event_recorder->parent;
- }
- case LTTNG_EVENT_ENABLER_TYPE_NOTIFIER:
- {
- struct lttng_event_notifier_enabler *event_notifier_enabler =
- container_of(event_enabler, struct lttng_event_notifier_enabler, parent);
- struct lttng_kernel_event_notifier *event_notifier;
-
- event_notifier = _lttng_kernel_event_notifier_create(event_notifier_enabler, event_desc);
- if (!event_notifier)
- return NULL;
- return &event_notifier->parent;
- }
- default:
- return NULL;
- }
-}
-
struct lttng_kernel_event_common *lttng_kernel_event_create(struct lttng_event_enabler_common *event_enabler,
const struct lttng_kernel_event_desc *event_desc)
{
return event;
}
-
-
int lttng_kernel_counter_read(struct lttng_counter *counter,
const size_t *dim_indexes, int32_t cpu,
int64_t *val, bool *overflow, bool *underflow)
projects / lttng-modules.git / commitdiff
