X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;ds=sidebyside;f=liblttng-ust%2Fust-core.c;h=9f21b9772e665cafe5ecd6bb5f247dfd0fbe8e6b;hb=aab8b172425eb52f2cd5bd71ce03f8a5624f83df;hp=60cdbfa91a2c876f5d5ae05db7a6ceae2a065df6;hpb=828c801ed0e0b82bb06421f561fc2d31184730e8;p=lttng-ust.git diff --git a/liblttng-ust/ust-core.c b/liblttng-ust/ust-core.c index 60cdbfa9..9f21b977 100644 --- a/liblttng-ust/ust-core.c +++ b/liblttng-ust/ust-core.c @@ -1,30 +1,23 @@ /* - * ust-core.c + * SPDX-License-Identifier: LGPL-2.1-only * * Copyright (C) 2011 Mathieu Desnoyers - * - * 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 +#include #include -#include + +#include "ust-events-internal.h" #include +#include "lttng-tracer-core.h" +#include "jhash.h" static CDS_LIST_HEAD(lttng_transport_list); +static CDS_LIST_HEAD(lttng_counter_transport_list); -struct lttng_transport *lttng_transport_find(const char *name) +struct lttng_transport *lttng_ust_transport_find(const char *name) { struct lttng_transport *transport; @@ -35,6 +28,17 @@ struct lttng_transport *lttng_transport_find(const char *name) return NULL; } +struct lttng_counter_transport *lttng_counter_transport_find(const char *name) +{ + struct lttng_counter_transport *transport; + + cds_list_for_each_entry(transport, <tng_counter_transport_list, node) { + if (!strcmp(transport->name, name)) + return transport; + } + return NULL; +} + /** * lttng_transport_register - LTT transport registration * @transport: transport structure @@ -56,3 +60,133 @@ 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, + 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(struct lttng_ust_ctx_field *field, size_t offset) +{ + size_t size = 0; + + size += lib_ring_buffer_align(offset, lttng_alignof(char)); + size += sizeof(char); /* tag */ + return size; +} + +void lttng_ust_dummy_record(struct lttng_ust_ctx_field *field, + struct lttng_ust_lib_ring_buffer_ctx *ctx, + struct lttng_ust_channel_buffer *chan) +{ + char sel_char = (char) LTTNG_UST_DYNAMIC_TYPE_NONE; + + lib_ring_buffer_align_ctx(ctx, lttng_alignof(sel_char)); + chan->ops->event_write(ctx, &sel_char, sizeof(sel_char)); +} + +void lttng_ust_dummy_get_value(struct lttng_ust_ctx_field *field, + 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(); + } +}