+/*
+ * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; only version 2 of the License.
+ *
+ * This program 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 General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <lttngerr.h>
+#include <lttng-share.h>
+
+#include "trace-ust.h"
+
+/*
+ * Find the channel name for the given ust session.
+ */
+struct ltt_ust_channel *trace_ust_get_channel_by_name(
+ char *name, struct ltt_ust_session *session)
+{
+ struct ltt_ust_channel *chan;
+
+ if (session == NULL) {
+ ERR("Undefine session");
+ goto error;
+ }
+
+ cds_list_for_each_entry(chan, &session->channels.head, list) {
+ if (strcmp(name, chan->name) == 0) {
+ DBG("Found UST channel by name %s", name);
+ return chan;
+ }
+ }
+
+error:
+ return NULL;
+}
+
+/*
+ * Find the event name for the given channel.
+ */
+struct ltt_ust_event *trace_ust_get_event_by_name(
+ char *name, struct ltt_ust_channel *channel)
+{
+ struct ltt_ust_event *ev;
+
+ if (channel == NULL) {
+ ERR("Undefine channel");
+ goto error;
+ }
+
+ cds_list_for_each_entry(ev, &channel->events.head, list) {
+ if (strcmp(name, ev->event->name) == 0) {
+ DBG("Found UST event by name %s for channel %s", name,
+ channel->name);
+ return ev;
+ }
+ }
+
+error:
+ return NULL;
+}
+
+/*
+ * Allocate and initialize a ust session data structure.
+ *
+ * Return pointer to structure or NULL.
+ */
+struct ltt_ust_session *trace_ust_create_session(void)
+{
+ struct ltt_ust_session *lus;
+
+ /* Allocate a new ltt ust session */
+ lus = malloc(sizeof(struct ltt_ust_session));
+ if (lus == NULL) {
+ perror("create ust session malloc");
+ goto error;
+ }
+
+ /* Init data structure */
+ lus->handle = -1;
+ lus->enabled = 1;
+ lus->uconsumer_fds_sent = 0;
+ lus->path = NULL;
+ lus->metadata = NULL;
+ lus->channels.count = 0;
+ CDS_INIT_LIST_HEAD(&lus->channels.head);
+
+ return lus;
+
+error:
+ return NULL;
+}
+
+/*
+ * Allocate and initialize a ust channel data structure.
+ *
+ * Return pointer to structure or NULL.
+ */
+struct ltt_ust_channel *trace_ust_create_channel(char *name, char *path,
+ struct lttng_ust_channel *chan)
+{
+ int ret;
+ struct ltt_ust_channel *luc;
+
+ luc = malloc(sizeof(struct ltt_ust_channel));
+ if (luc == NULL) {
+ perror("ltt_ust_channel malloc");
+ goto error;
+ }
+
+ luc->attr = malloc(sizeof(struct lttng_ust_channel));
+ if (luc->attr == NULL) {
+ perror("lttng_ust_channel malloc");
+ goto error;
+ }
+ memcpy(luc->attr, chan, sizeof(struct lttng_ust_channel));
+
+ luc->handle = -1;
+ luc->enabled = 1;
+ luc->ctx = NULL;
+ luc->events.count = 0;
+ CDS_INIT_LIST_HEAD(&luc->events.head);
+
+ /* Copy channel name */
+ strncpy(luc->name, name, LTTNG_UST_SYM_NAME_LEN);
+ luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+
+ /* Set trace output path */
+ ret = asprintf(&luc->trace_path, "%s", path);
+ if (ret < 0) {
+ perror("asprintf ust create channel");
+ goto error;
+ }
+
+ return luc;
+
+error:
+ return NULL;
+}
+
+/*
+ * Allocate and initialize a ust event. Set name and event type.
+ *
+ * Return pointer to structure or NULL.
+ */
+struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev)
+{
+ struct ltt_ust_event *lue;
+ struct lttng_ust_event *event;
+
+ lue = malloc(sizeof(struct ltt_ust_event));
+ event = malloc(sizeof(struct lttng_ust_event));
+ if (lue == NULL || event == NULL) {
+ perror("ust event malloc");
+ goto error;
+ }
+
+ switch (ev->type) {
+ case LTTNG_EVENT_PROBE:
+ event->instrumentation = LTTNG_UST_PROBE;
+ break;
+ case LTTNG_EVENT_FUNCTION:
+ event->instrumentation = LTTNG_UST_FUNCTION;
+ break;
+ case LTTNG_EVENT_FUNCTION_ENTRY:
+ event->instrumentation = LTTNG_UST_FUNCTION;
+ break;
+ case LTTNG_EVENT_TRACEPOINT:
+ event->instrumentation = LTTNG_UST_TRACEPOINT;
+ break;
+ default:
+ ERR("Unknown ust instrumentation type (%d)", ev->type);
+ goto error;
+ }
+
+ /* Copy event name */
+ strncpy(event->name, ev->name, LTTNG_UST_SYM_NAME_LEN);
+ event->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+
+ /* Setting up a ust event */
+ lue->handle = -1;
+ lue->event = event;
+ lue->enabled = 1;
+ lue->ctx = NULL;
+
+ return lue;
+
+error:
+ return NULL;
+}
+
+/*
+ * Allocate and initialize a ust metadata.
+ *
+ * Return pointer to structure or NULL.
+ */
+struct ltt_ust_metadata *trace_ust_create_metadata(char *path)
+{
+ int ret;
+ struct ltt_ust_metadata *lum;
+ struct lttng_ust_channel *attr;
+
+ lum = malloc(sizeof(struct ltt_ust_metadata));
+ attr = malloc(sizeof(struct lttng_ust_channel));
+ if (lum == NULL || attr == NULL) {
+ perror("ust metadata malloc");
+ goto error;
+ }
+
+ /* Set default attributes */
+ attr->overwrite = DEFAULT_CHANNEL_OVERWRITE;
+ attr->subbuf_size = DEFAULT_METADATA_SUBBUF_SIZE;
+ attr->num_subbuf = DEFAULT_METADATA_SUBBUF_NUM;
+ attr->switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
+ attr->read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;
+ attr->output = DEFAULT_UST_CHANNEL_OUTPUT;
+
+ lum->attr = attr;
+ lum->handle = -1;
+ /* Set metadata trace path */
+ ret = asprintf(&lum->trace_path, "%s/metadata", path);
+ if (ret < 0) {
+ perror("asprintf ust metadata");
+ goto error;
+ }
+
+ return lum;
+
+error:
+ return NULL;
+}
+
+/*
+ * Cleanup ust event structure.
+ */
+void trace_ust_destroy_event(struct ltt_ust_event *event)
+{
+ DBG("[trace] Destroy ust event %s", event->event->name);
+
+ /* Free attributes */
+ free(event->event);
+ free(event->ctx);
+
+ /* Remove from event list */
+ cds_list_del(&event->list);
+ free(event);
+}
+
+/*
+ * Cleanup ust channel structure.
+ */
+void trace_ust_destroy_channel(struct ltt_ust_channel *channel)
+{
+ struct ltt_ust_event *event, *etmp;
+
+ DBG("[trace] Destroy ust channel %d", channel->handle);
+
+ free(channel->trace_path);
+ /* Free attributes structure */
+ free(channel->attr);
+ free(channel->ctx);
+
+ /* For each event in the channel list */
+ cds_list_for_each_entry_safe(event, etmp, &channel->events.head, list) {
+ trace_ust_destroy_event(event);
+ }
+
+ /* Remove from channel list */
+ cds_list_del(&channel->list);
+ free(channel);
+}
+
+/*
+ * Cleanup ust metadata structure.
+ */
+void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata)
+{
+ DBG("[trace] Destroy ust metadata %d", metadata->handle);
+
+ /* Free attributes */
+ free(metadata->attr);
+ free(metadata->trace_path);
+
+ free(metadata);
+}
+
+/*
+ * Cleanup ust session structure
+ */
+void trace_ust_destroy_session(struct ltt_ust_session *session)
+{
+ struct ltt_ust_channel *channel, *ctmp;
+
+ DBG("[trace] Destroy ust session %d", session->handle);
+
+ /* Extra safety */
+ if (session == NULL) {
+ return;
+ }
+
+ if (session->metadata != NULL) {
+ trace_ust_destroy_metadata(session->metadata);
+ }
+
+ cds_list_for_each_entry_safe(channel, ctmp, &session->channels.head, list) {
+ trace_ust_destroy_channel(channel);
+ }
+
+ free(session->path);
+ free(session);
+}
projects / lttng-tools.git / commitdiff
