#include "hashtable.h"
#include "ust-app.h"
-#include "../hashtable/hash.h"
-#include "ust-ctl.h"
#include "ust-consumer.h"
+#include "ust-ctl.h"
+
+/*
+ * Delete ust app event safely. RCU read lock must be held before calling
+ * this function.
+ */
+static void delete_ust_app_event(int sock, struct ust_app_event *ua_event)
+{
+ /* TODO : remove context */
+ //struct ust_app_ctx *ltctx;
+ //cds_lfht_for_each_entry(lte->ctx, &iter, ltctx, node) {
+ // delete_ust_app_ctx(sock, ltctx);
+ //}
+
+ ustctl_release_object(sock, ua_event->obj);
+ free(ua_event);
+}
+
+/*
+ * Delete ust app stream safely. RCU read lock must be held before calling
+ * this function.
+ */
+static void delete_ust_app_stream(int sock, struct ltt_ust_stream *stream)
+{
+ //TODO
+ //stream is used for passing to consumer.
+ //send_channel_streams is responsible for freeing the streams.
+ //note that this will not play well with flight recorder mode:
+ //we might need a criterion to discard the streams.
+}
+
+/*
+ * Delete ust app channel safely. RCU read lock must be held before calling
+ * this function.
+ */
+static void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan)
+{
+ int ret;
+ struct cds_lfht_iter iter;
+ struct ust_app_event *ua_event;
+ struct ltt_ust_stream *stream, *stmp;
+
+ cds_list_for_each_entry_safe(stream, stmp, &ua_chan->streams.head, list) {
+ delete_ust_app_stream(sock, stream);
+ }
+
+ /* TODO : remove channel context */
+ //cds_lfht_for_each_entry(ltc->ctx, &iter, ltctx, node) {
+ // hashtable_del(ltc->ctx, &iter);
+ // delete_ust_app_ctx(sock, ltctx);
+ //}
+ //ret = hashtable_destroy(ltc->ctx);
+
+ cds_lfht_for_each_entry(ua_chan->events, &iter, ua_event, node) {
+ hashtable_del(ua_chan->events, &iter);
+ delete_ust_app_event(sock, ua_event);
+ }
+
+ ret = hashtable_destroy(ua_chan->events);
+ if (ret < 0) {
+ ERR("UST app destroy session hashtable failed");
+ goto error;
+ }
+
+error:
+ return;
+}
+
+/*
+ * Delete ust app session safely. RCU read lock must be held before calling
+ * this function.
+ */
+static void delete_ust_app_session(int sock,
+ struct ust_app_session *ua_sess)
+{
+ int ret;
+ struct cds_lfht_iter iter;
+ struct ust_app_channel *ua_chan;
+
+ if (ua_sess->metadata) {
+ /*
+ * We do NOT release the stream object and metadata object since they
+ * are release when fds are sent to the consumer.
+ */
+ }
+
+ cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) {
+ hashtable_del(ua_sess->channels, &iter);
+ delete_ust_app_channel(sock, ua_chan);
+ }
+
+ ret = hashtable_destroy(ua_sess->channels);
+ if (ret < 0) {
+ ERR("UST app destroy session hashtable failed");
+ goto error;
+ }
+
+error:
+ return;
+}
/*
* Delete a traceable application structure from the global list.
int ret;
struct cds_lfht_node *node;
struct cds_lfht_iter iter;
+ struct ust_app_session *lts;
rcu_read_lock();
- /* TODO: clean session hashtable */
- free(lta->sessions);
- close(lta->key.sock);
-
/* Remove from apps hash table */
node = hashtable_lookup(ust_app_ht,
(void *) ((unsigned long) lta->key.pid), sizeof(void *), &iter);
if (node == NULL) {
ERR("UST app pid %d not found in hash table", lta->key.pid);
+ goto end;
} else {
ret = hashtable_del(ust_app_ht, &iter);
if (ret) {
(void *) ((unsigned long) lta->key.sock), sizeof(void *), &iter);
if (node == NULL) {
ERR("UST app key %d not found in key hash table", lta->key.sock);
+ goto end;
} else {
ret = hashtable_del(ust_app_sock_key_map, &iter);
if (ret) {
}
}
- free(lta);
+ /* Socket is already closed at this point */
+ /* Delete ust app sessions info */
+ if (lta->sock_closed) {
+ lta->key.sock = -1;
+ }
+
+ cds_lfht_for_each_entry(lta->sessions, &iter, lts, node) {
+ hashtable_del(lta->sessions, &iter);
+ delete_ust_app_session(lta->key.sock, lts);
+ }
+
+ ret = hashtable_destroy(lta->sessions);
+ if (ret < 0) {
+ ERR("UST app destroy session hashtable failed");
+ goto end;
+ }
+
+ if (lta->key.sock >= 0) {
+ close(lta->key.sock);
+ }
+
+ free(lta);
+end:
rcu_read_unlock();
}
(void *)((unsigned long) sock), sizeof(void *), &iter);
if (node == NULL) {
DBG2("UST app find by sock %d key not found", sock);
- rcu_read_unlock();
goto error;
}
(void *)((unsigned long) key->pid), sizeof(void *), &iter);
if (node == NULL) {
DBG2("UST app find by sock %d not found", sock);
- rcu_read_unlock();
goto error;
}
-
return caa_container_of(node, struct ust_app, node);
error:
node = hashtable_lookup(ust_app_ht,
(void *)((unsigned long) pid), sizeof(void *), &iter);
if (node == NULL) {
- rcu_read_unlock();
DBG2("UST app no found with pid %d", pid);
goto error;
}
return caa_container_of(node, struct ust_app, node);
error:
+ rcu_read_unlock();
return NULL;
}
{
struct ust_app *lta;
- lta = malloc(sizeof(struct ust_app));
+ lta = zmalloc(sizeof(struct ust_app));
if (lta == NULL) {
PERROR("malloc");
return -ENOMEM;
goto error;
}
+ /* We got called because the socket was closed on the remote end. */
+ close(sock);
+ /* Using a flag because we still need "sock" as a key. */
+ lta->sock_closed = 1;
call_rcu(&node->head, delete_ust_app_rcu);
-
error:
rcu_read_unlock();
return;
return count;
}
+/*
+ * Fill events array with all events name of all registered apps.
+ */
+int ust_app_list_events(struct lttng_event **events)
+{
+ int ret, handle;
+ size_t nbmem, count = 0;
+ struct cds_lfht_iter iter;
+ struct ust_app *app;
+ struct lttng_event *tmp;
+
+ nbmem = UST_APP_EVENT_LIST_SIZE;
+ tmp = zmalloc(nbmem * sizeof(struct lttng_event));
+ if (tmp == NULL) {
+ PERROR("zmalloc ust app events");
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ rcu_read_lock();
+
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
+ handle = ustctl_tracepoint_list(app->key.sock);
+ if (handle < 0) {
+ ERR("UST app list events getting handle failed for app pid %d",
+ app->key.pid);
+ continue;
+ }
+
+ while ((ret = ustctl_tracepoint_list_get(app->key.sock, handle,
+ tmp[count].name)) != -ENOENT) {
+ if (count > nbmem) {
+ DBG2("Reallocating event list from %zu to %zu bytes", nbmem,
+ nbmem + UST_APP_EVENT_LIST_SIZE);
+ nbmem += UST_APP_EVENT_LIST_SIZE;
+ tmp = realloc(tmp, nbmem);
+ if (tmp == NULL) {
+ PERROR("realloc ust app events");
+ ret = -ENOMEM;
+ goto rcu_error;
+ }
+ }
+
+ tmp[count].type = LTTNG_UST_TRACEPOINT;
+ tmp[count].pid = app->key.pid;
+ count++;
+ }
+ }
+
+ ret = count;
+ *events = tmp;
+
+ DBG2("UST app list events done (%zu events)", count);
+
+rcu_error:
+ rcu_read_unlock();
+error:
+ return ret;
+}
+
/*
* Free and clean all traceable apps of the global list.
*/
/* Create session on the tracer side and add it to app session HT */
ua_sess = create_ust_app_session(usess, app);
- if (ret < 0) {
+ if (ua_sess == NULL) {
goto next;
}
/* Create session on the tracer side and add it to app session HT */
ua_sess = create_ust_app_session(usess, app);
- if (ret < 0) {
+ if (ua_sess == NULL) {
goto next;
}
DBG("Starting tracing for ust app pid %d", app->key.pid);
+ rcu_read_lock();
+
ua_sess = lookup_session_by_app(usess, app);
if (ua_sess == NULL) {
/* Only malloc can failed so something is really wrong */
- goto error;
+ goto error_rcu_unlock;
}
ret = create_ust_app_metadata(ua_sess, usess->pathname, app);
if (ret < 0) {
- goto error;
+ goto error_rcu_unlock;
}
/* For each channel */
ustream = zmalloc(sizeof(*ustream));
if (ustream == NULL) {
PERROR("zmalloc ust stream");
- continue;
+ goto error_rcu_unlock;
}
ret = ustctl_create_stream(app->key.sock, ua_chan->obj,
/* Setup UST consumer socket and send fds to it */
ret = ust_consumer_send_session(usess->consumer_fd, ua_sess);
if (ret < 0) {
- goto error;
+ goto error_rcu_unlock;
}
/* This start the UST tracing */
ret = ustctl_start_session(app->key.sock, ua_sess->handle);
if (ret < 0) {
ERR("Error starting tracing for app pid: %d", app->key.pid);
- goto error;
+ goto error_rcu_unlock;
}
+ rcu_read_unlock();
/* Quiescent wait after starting trace */
ustctl_wait_quiescent(app->key.sock);
return 0;
-error:
+error_rcu_unlock:
+ rcu_read_unlock();
return -1;
}
projects / lttng-tools.git / blobdiff