/*
- * ust-core.c
+ * SPDX-License-Identifier: LGPL-2.1-only
*
* Copyright (C) 2011 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
*/
+#define _LGPL_SOURCE
+#include <stdint.h>
+#include <stddef.h>
#include <stdlib.h>
-#include <lttng/ust-events.h>
+
+#include "context-internal.h"
+#include "ust-events-internal.h"
#include <usterr-signal-safe.h>
+#include "lttng-tracer-core.h"
+#include "lttng-rb-clients.h"
+#include "lttng-counter-client.h"
+#include "jhash.h"
-static CDS_LIST_HEAD(ltt_transport_list);
+static CDS_LIST_HEAD(lttng_transport_list);
+static CDS_LIST_HEAD(lttng_counter_transport_list);
-void init_usterr(void)
+struct lttng_transport *lttng_ust_transport_find(const char *name)
{
- char *ust_debug;
+ struct lttng_transport *transport;
- if (ust_loglevel == UST_LOGLEVEL_UNKNOWN) {
- ust_debug = getenv("LTTNG_UST_DEBUG");
- if (ust_debug)
- ust_loglevel = UST_LOGLEVEL_DEBUG;
- else
- ust_loglevel = UST_LOGLEVEL_NORMAL;
+ cds_list_for_each_entry(transport, <tng_transport_list, node) {
+ if (!strcmp(transport->name, name))
+ return transport;
}
+ return NULL;
}
-struct ltt_transport *ltt_transport_find(const char *name)
+struct lttng_counter_transport *lttng_counter_transport_find(const char *name)
{
- struct ltt_transport *transport;
+ struct lttng_counter_transport *transport;
- cds_list_for_each_entry(transport, <t_transport_list, node) {
+ cds_list_for_each_entry(transport, <tng_counter_transport_list, node) {
if (!strcmp(transport->name, name))
return transport;
}
}
/**
- * ltt_transport_register - LTT transport registration
+ * lttng_transport_register - LTT transport registration
* @transport: transport structure
*
* Registers a transport which can be used as output to extract the data out of
* LTTng. Called with ust_lock held.
*/
-void ltt_transport_register(struct ltt_transport *transport)
+void lttng_transport_register(struct lttng_transport *transport)
{
- cds_list_add_tail(&transport->node, <t_transport_list);
+ cds_list_add_tail(&transport->node, <tng_transport_list);
}
/**
- * ltt_transport_unregister - LTT transport unregistration
+ * lttng_transport_unregister - LTT transport unregistration
* @transport: transport structure
* Called with ust_lock held.
*/
-void ltt_transport_unregister(struct ltt_transport *transport)
+void lttng_transport_unregister(struct lttng_transport *transport)
{
cds_list_del(&transport->node);
}
+
+/**
+ * lttng_counter_transport_register - LTTng counter transport registration
+ * @transport: transport structure
+ *
+ * Registers a counter transport which can be used as output to extract
+ * the data out of LTTng. Called with ust_lock held.
+ */
+void lttng_counter_transport_register(struct lttng_counter_transport *transport)
+{
+ cds_list_add_tail(&transport->node, <tng_counter_transport_list);
+}
+
+/**
+ * lttng_counter_transport_unregister - LTTng counter transport unregistration
+ * @transport: transport structure
+ * Called with ust_lock held.
+ */
+void lttng_counter_transport_unregister(struct lttng_counter_transport *transport)
+{
+ cds_list_del(&transport->node);
+}
+
+/*
+ * Needed by comm layer.
+ */
+struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_ust_session *session,
+ const struct lttng_ust_enum_desc *enum_desc)
+{
+ struct lttng_enum *_enum;
+ struct cds_hlist_head *head;
+ struct cds_hlist_node *node;
+ size_t name_len = strlen(enum_desc->name);
+ uint32_t hash;
+
+ hash = jhash(enum_desc->name, name_len, 0);
+ head = &session->priv->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)];
+ cds_hlist_for_each_entry(_enum, node, head, hlist) {
+ assert(_enum->desc);
+ if (_enum->desc == enum_desc)
+ return _enum;
+ }
+ return NULL;
+}
+
+size_t lttng_ust_dummy_get_size(void *priv __attribute__((unused)),
+ size_t offset)
+{
+ size_t size = 0;
+
+ size += lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(char));
+ size += sizeof(char); /* tag */
+ return size;
+}
+
+void lttng_ust_dummy_record(void *priv __attribute__((unused)),
+ struct lttng_ust_lib_ring_buffer_ctx *ctx,
+ struct lttng_ust_channel_buffer *chan)
+{
+ char sel_char = (char) LTTNG_UST_DYNAMIC_TYPE_NONE;
+
+ chan->ops->event_write(ctx, &sel_char, sizeof(sel_char), lttng_ust_rb_alignof(sel_char));
+}
+
+void lttng_ust_dummy_get_value(void *priv __attribute__((unused)),
+ struct lttng_ust_ctx_value *value)
+{
+ value->sel = LTTNG_UST_DYNAMIC_TYPE_NONE;
+}
+
+int lttng_context_is_app(const char *name)
+{
+ if (strncmp(name, "$app.", strlen("$app.")) != 0) {
+ return 0;
+ }
+ return 1;
+}
+
+struct lttng_ust_channel_buffer *lttng_ust_alloc_channel_buffer(void)
+{
+ struct lttng_ust_channel_buffer *lttng_chan_buf;
+ struct lttng_ust_channel_common *lttng_chan_common;
+ struct lttng_ust_channel_buffer_private *lttng_chan_buf_priv;
+
+ lttng_chan_buf = zmalloc(sizeof(struct lttng_ust_channel_buffer));
+ if (!lttng_chan_buf)
+ goto lttng_chan_buf_error;
+ lttng_chan_buf->struct_size = sizeof(struct lttng_ust_channel_buffer);
+ lttng_chan_common = zmalloc(sizeof(struct lttng_ust_channel_common));
+ if (!lttng_chan_common)
+ goto lttng_chan_common_error;
+ lttng_chan_common->struct_size = sizeof(struct lttng_ust_channel_common);
+ lttng_chan_buf_priv = zmalloc(sizeof(struct lttng_ust_channel_buffer_private));
+ if (!lttng_chan_buf_priv)
+ goto lttng_chan_buf_priv_error;
+ lttng_chan_buf->parent = lttng_chan_common;
+ lttng_chan_common->type = LTTNG_UST_CHANNEL_TYPE_BUFFER;
+ lttng_chan_common->child = lttng_chan_buf;
+ lttng_chan_buf->priv = lttng_chan_buf_priv;
+ lttng_chan_common->priv = <tng_chan_buf_priv->parent;
+ lttng_chan_buf_priv->pub = lttng_chan_buf;
+ lttng_chan_buf_priv->parent.pub = lttng_chan_common;
+
+ return lttng_chan_buf;
+
+lttng_chan_buf_priv_error:
+ free(lttng_chan_common);
+lttng_chan_common_error:
+ free(lttng_chan_buf);
+lttng_chan_buf_error:
+ return NULL;
+}
+
+void lttng_ust_free_channel_common(struct lttng_ust_channel_common *chan)
+{
+ switch (chan->type) {
+ case LTTNG_UST_CHANNEL_TYPE_BUFFER:
+ {
+ struct lttng_ust_channel_buffer *chan_buf;
+
+ chan_buf = (struct lttng_ust_channel_buffer *)chan->child;
+ free(chan_buf->parent);
+ free(chan_buf->priv);
+ free(chan_buf);
+ break;
+ }
+ default:
+ abort();
+ }
+}
+
+void lttng_ust_ring_buffer_clients_init(void)
+{
+ lttng_ring_buffer_metadata_client_init();
+ lttng_ring_buffer_client_overwrite_init();
+ lttng_ring_buffer_client_overwrite_rt_init();
+ lttng_ring_buffer_client_discard_init();
+ lttng_ring_buffer_client_discard_rt_init();
+}
+
+void lttng_ust_ring_buffer_clients_exit(void)
+{
+ lttng_ring_buffer_client_discard_rt_exit();
+ lttng_ring_buffer_client_discard_exit();
+ lttng_ring_buffer_client_overwrite_rt_exit();
+ lttng_ring_buffer_client_overwrite_exit();
+ lttng_ring_buffer_metadata_client_exit();
+}
+
+void lttng_ust_counter_clients_init(void)
+{
+ lttng_counter_client_percpu_64_modular_init();
+ lttng_counter_client_percpu_32_modular_init();
+}
+
+void lttng_ust_counter_clients_exit(void)
+{
+ lttng_counter_client_percpu_32_modular_exit();
+ lttng_counter_client_percpu_64_modular_exit();
+}
projects / lttng-ust.git / blobdiff