#include <unistd.h>
#include <lttngerr.h>
+#include <lttng-share.h>
#include "hashtable.h"
#include "ust-app.h"
#include "../hashtable/hash.h"
+#include "ust-ctl.h"
+#include "ust-consumer.h"
/*
* Delete a traceable application structure from the global list.
rcu_read_lock();
- hashtable_get_first(lta->channels, &iter);
- while ((node = hashtable_iter_get_node(&iter)) != NULL) {
- ret = hashtable_del(lta->channels, &iter);
- if (!ret) {
- trace_ust_destroy_channel(
- caa_container_of(node, struct ltt_ust_channel, node));
- }
- hashtable_get_next(lta->channels, &iter);
- }
-
- free(lta->channels);
+ free(lta->sessions);
close(lta->key.sock);
/* Remove from apps hash table */
struct cds_lfht_node *node;
struct ust_app_key *key;
struct cds_lfht_iter iter;
- //struct ust_app *app;
rcu_read_lock();
lta = malloc(sizeof(struct ust_app));
if (lta == NULL) {
- perror("malloc");
+ PERROR("malloc");
return -ENOMEM;
}
lta->name[16] = '\0';
hashtable_node_init(<a->node, (void *)((unsigned long)lta->key.pid),
sizeof(void *));
- lta->channels = hashtable_new_str(0);
+
+ /* Session hashtable */
+ lta->sessions = hashtable_new(0);
/* Set sock key map */
hashtable_node_init(<a->key.node, (void *)((unsigned long)lta->key.sock),
ust_app_ht = hashtable_new(0);
ust_app_sock_key_map = hashtable_new(0);
}
+
+/*
+ * Alloc new UST app session.
+ */
+static struct ust_app_session *alloc_app_session(void)
+{
+ struct ust_app_session *ua_sess;
+
+ ua_sess = zmalloc(sizeof(struct ust_app_session));
+ if (ua_sess == NULL) {
+ PERROR("malloc");
+ goto error;
+ }
+
+ ua_sess->enabled = 0;
+ ua_sess->handle = -1;
+ ua_sess->channels = hashtable_new_str(0);
+ ua_sess->metadata = NULL;
+ ua_sess->obj = NULL;
+
+ return ua_sess;
+
+error:
+ return NULL;
+}
+
+static struct ust_app_channel *alloc_app_channel(char *name)
+{
+ struct ust_app_channel *ua_chan;
+
+ ua_chan = zmalloc(sizeof(struct ust_app_channel));
+ if (ua_chan == NULL) {
+ PERROR("malloc");
+ goto error;
+ }
+
+ strncpy(ua_chan->name, name, sizeof(ua_chan->name));
+ ua_chan->name[sizeof(ua_chan->name) - 1] = '\0';
+ ua_chan->enabled = 0;
+ ua_chan->handle = -1;
+ ua_chan->obj = NULL;
+ ua_chan->ctx = hashtable_new(0);
+ ua_chan->streams = hashtable_new(0);
+ ua_chan->events = hashtable_new_str(0);
+ hashtable_node_init(&ua_chan->node, (void *) ua_chan->name,
+ strlen(ua_chan->name));
+
+ DBG3("UST app channel %s allocated", ua_chan->name);
+
+ return ua_chan;
+
+error:
+ return NULL;
+}
+
+static struct ust_app_event *alloc_app_event(char *name)
+{
+ struct ust_app_event *ua_event;
+
+ ua_event = zmalloc(sizeof(struct ust_app_event));
+ if (ua_event == NULL) {
+ PERROR("malloc");
+ goto error;
+ }
+
+ strncpy(ua_event->name, name, sizeof(ua_event->name));
+ ua_event->name[sizeof(ua_event->name) - 1] = '\0';
+ ua_event->ctx = hashtable_new(0);
+ hashtable_node_init(&ua_event->node, (void *) ua_event->name,
+ strlen(ua_event->name));
+
+ DBG3("UST app event %s allocated", ua_event->name);
+
+ return ua_event;
+
+error:
+ return NULL;
+}
+
+static void shallow_copy_event(struct ust_app_event *ua_event,
+ struct ltt_ust_event *uevent)
+{
+ strncpy(ua_event->name, uevent->attr.name, sizeof(ua_event->name));
+ ua_event->name[sizeof(ua_event->name) - 1] = '\0';
+
+ /* TODO: support copy context */
+}
+
+static void shallow_copy_channel(struct ust_app_channel *ua_chan,
+ struct ltt_ust_channel *uchan)
+{
+ struct cds_lfht_iter iter;
+ struct cds_lfht_node *node, *ua_event_node;
+ struct ltt_ust_event *uevent;
+ struct ust_app_event *ua_event;
+
+ DBG2("Shallow copy of UST app channel %s", ua_chan->name);
+
+ strncpy(ua_chan->name, uchan->name, sizeof(ua_chan->name));
+ ua_chan->name[sizeof(ua_chan->name) - 1] = '\0';
+
+ /* TODO: support copy context */
+
+ hashtable_get_first(uchan->events, &iter);
+ while ((node = hashtable_iter_get_node(&iter)) != NULL) {
+ uevent = caa_container_of(node, struct ltt_ust_event, node);
+
+ ua_event_node = hashtable_lookup(ua_chan->events,
+ (void *) uevent->attr.name, strlen(uevent->attr.name), &iter);
+ if (ua_event_node == NULL) {
+ DBG2("UST event %s not found on shallow copy channel",
+ uevent->attr.name);
+ ua_event = alloc_app_event(uevent->attr.name);
+ if (ua_event == NULL) {
+ continue;
+ }
+ hashtable_add_unique(ua_chan->events, &ua_event->node);
+ } else {
+ ua_event = caa_container_of(node, struct ust_app_event, node);
+ }
+
+ shallow_copy_event(ua_event, uevent);
+
+ /* Get next UST events */
+ hashtable_get_next(uchan->events, &iter);
+ }
+
+ DBG3("Shallow copy channel done");
+}
+
+static void shallow_copy_session(struct ust_app_session *ua_sess,
+ struct ltt_ust_session *usess)
+{
+ struct cds_lfht_node *node, *ua_chan_node;
+ struct cds_lfht_iter iter;
+ struct ltt_ust_channel *uchan;
+ struct ust_app_channel *ua_chan;
+
+ DBG2("Shallow copy of session handle");
+
+ ua_sess->uid = usess->uid;
+
+ /* TODO: support all UST domain */
+
+ /* Iterate over all channels in global domain. */
+ hashtable_get_first(usess->domain_global.channels, &iter);
+ while ((node = hashtable_iter_get_node(&iter)) != NULL) {
+ uchan = caa_container_of(node, struct ltt_ust_channel, node);
+
+ ua_chan_node = hashtable_lookup(ua_sess->channels,
+ (void *) uchan->name, strlen(uchan->name), &iter);
+ if (ua_chan_node == NULL) {
+ DBG2("Channel %s not found on shallow session copy, creating it",
+ uchan->name);
+ ua_chan = alloc_app_channel(uchan->name);
+ if (ua_chan == NULL) {
+ /* malloc failed... continuing */
+ continue;
+ }
+ hashtable_add_unique(ua_sess->channels, &ua_chan->node);
+ } else {
+ ua_chan = caa_container_of(node, struct ust_app_channel, node);
+ }
+
+ shallow_copy_channel(ua_chan, uchan);
+
+ /* Next item in hash table */
+ hashtable_get_next(usess->domain_global.channels, &iter);
+ }
+}
+
+static struct ust_app_session *lookup_session_by_app(
+ struct ltt_ust_session *usess, struct ust_app *app)
+{
+ struct cds_lfht_iter iter;
+ struct cds_lfht_node *node;
+
+ /* Get right UST app session from app */
+ node = hashtable_lookup(app->sessions,
+ (void *) ((unsigned long) usess->uid),
+ sizeof(void *), &iter);
+ if (node == NULL) {
+ goto error;
+ }
+
+ return caa_container_of(node, struct ust_app_session, node);
+
+error:
+ return NULL;
+}
+
+int ust_app_add_channel(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter;
+ struct cds_lfht_node *node, *ua_chan_node;
+ struct ust_app *app;
+ struct ust_app_session *ua_sess;
+ struct ust_app_channel *ua_chan;
+
+ DBG2("UST app adding channel %s to global domain for session uid %d",
+ uchan->name, usess->uid);
+
+ rcu_read_lock();
+ hashtable_get_first(ust_app_ht, &iter);
+ while ((node = hashtable_iter_get_node(&iter)) != NULL) {
+ app = caa_container_of(node, struct ust_app, node);
+
+ ua_sess = lookup_session_by_app(usess, app);
+ if (ua_sess == NULL) {
+ DBG2("UST app pid: %d session uid %d not found, creating one",
+ app->key.pid, usess->uid);
+ ua_sess = alloc_app_session();
+ if (ua_sess == NULL) {
+ /* Only malloc can failed so something is really wrong */
+ goto next;
+ }
+ shallow_copy_session(ua_sess, usess);
+ }
+
+ if (ua_sess->handle == -1) {
+ ret = ustctl_create_session(app->key.sock);
+ if (ret < 0) {
+ DBG("Error creating session for app pid %d, sock %d",
+ app->key.pid, app->key.sock);
+ /* TODO: free() ua_sess */
+ goto next;
+ }
+
+ DBG2("UST app ustctl create session handle %d", ret);
+ ua_sess->handle = ret;
+
+ /* Add ust app session to app's HT */
+ hashtable_node_init(&ua_sess->node,
+ (void *)((unsigned long) ua_sess->uid), sizeof(void *));
+ hashtable_add_unique(app->sessions, &ua_sess->node);
+ }
+
+ /* Lookup channel in the ust app session */
+ ua_chan_node = hashtable_lookup(ua_sess->channels,
+ (void *) uchan->name, strlen(uchan->name), &iter);
+ if (ua_chan_node == NULL) {
+ ERR("Channel suppose to be present with the above shallow "
+ "session copy. Continuing...");
+ goto next;
+ }
+
+ ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node);
+
+ /* TODO: remove cast and use lttng-ust-abi.h */
+ ret = ustctl_create_channel(app->key.sock, ua_sess->handle,
+ (struct lttng_ust_channel_attr *)&uchan->attr, &ua_chan->obj);
+ if (ret < 0) {
+ DBG("Error creating channel %s for app (pid: %d, sock: %d) "
+ "and session handle %d with ret %d",
+ uchan->name, app->key.pid, app->key.sock,
+ ua_sess->handle, ret);
+ goto next;
+ }
+
+ ua_chan->handle = ua_chan->obj->handle;
+ ua_chan->attr.shm_fd = ua_chan->obj->shm_fd;
+ ua_chan->attr.wait_fd = ua_chan->obj->wait_fd;
+ ua_chan->attr.memory_map_size = ua_chan->obj->memory_map_size;
+
+ DBG2("Channel %s UST create successfully for pid:%d and sock:%d",
+ uchan->name, app->key.pid, app->key.sock);
+
+next:
+ /* Next applications */
+ hashtable_get_next(ust_app_ht, &iter);
+ }
+ rcu_read_unlock();
+
+ return ret;
+}
+
+int ust_app_add_event(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter;
+ struct cds_lfht_node *node, *ua_chan_node, *ua_event_node;
+ struct ust_app *app;
+ struct ust_app_session *ua_sess;
+ struct ust_app_channel *ua_chan;
+ struct ust_app_event *ua_event;
+ struct lttng_ust_event ltt_uevent;
+ struct object_data *obj_event;
+
+ DBG2("UST app adding event %s to global domain for session uid %d",
+ uevent->attr.name, usess->uid);
+
+ rcu_read_lock();
+ hashtable_get_first(ust_app_ht, &iter);
+ while ((node = hashtable_iter_get_node(&iter)) != NULL) {
+ app = caa_container_of(node, struct ust_app, node);
+
+ ua_sess = lookup_session_by_app(usess, app);
+ if (ua_sess == NULL) {
+ DBG2("UST app (pid: %d, sock: %d) session not found, creating one",
+ app->key.pid, app->key.sock);
+ ua_sess = alloc_app_session();
+ if (ua_sess == NULL) {
+ /* Only malloc can failed so something is really wrong */
+ goto next;
+ }
+ shallow_copy_session(ua_sess, usess);
+ }
+
+ if (ua_sess->handle == -1) {
+ ret = ustctl_create_session(app->key.sock);
+ if (ret < 0) {
+ DBG("Error creating session for app pid %d, sock %d",
+ app->key.pid, app->key.sock);
+ /* TODO: free() ua_sess */
+ goto next;
+ }
+
+ DBG2("UST app ustctl create session handle %d", ret);
+ ua_sess->handle = ret;
+ /* Add ust app session to app's HT */
+ hashtable_node_init(&ua_sess->node,
+ (void *)((unsigned long) ua_sess->uid), sizeof(void *));
+ hashtable_add_unique(app->sessions, &ua_sess->node);
+ }
+
+ /* Lookup channel in the ust app session */
+ ua_chan_node = hashtable_lookup(ua_sess->channels,
+ (void *) uchan->name, strlen(uchan->name), &iter);
+ if (ua_chan_node == NULL) {
+ ERR("Channel suppose to be present with the above shallow "
+ "session copy. Continuing...");
+ goto next;
+ }
+
+ ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node);
+
+ /* Prepare lttng ust event */
+ strncpy(ltt_uevent.name, uevent->attr.name, sizeof(ltt_uevent.name));
+ ltt_uevent.name[sizeof(ltt_uevent.name) - 1] = '\0';
+ /* TODO: adjust to other instrumentation types */
+ ltt_uevent.instrumentation = LTTNG_UST_TRACEPOINT;
+
+ /* Get event node */
+ ua_event_node = hashtable_lookup(ua_chan->events,
+ (void *) uevent->attr.name, strlen(uevent->attr.name), &iter);
+ if (ua_event_node == NULL) {
+ DBG2("UST app event %s not found, creating one", uevent->attr.name);
+ /* Does not exist so create one */
+ ua_event = alloc_app_event(uevent->attr.name);
+ if (ua_event == NULL) {
+ /* Only malloc can failed so something is really wrong */
+ goto next;
+ }
+
+ shallow_copy_event(ua_event, uevent);
+
+ /* Create UST event on tracer */
+ ret = ustctl_create_event(app->key.sock, <t_uevent, ua_chan->obj,
+ &obj_event);
+ if (ret < 0) {
+ ERR("Error ustctl create event %s for app pid: %d with ret %d",
+ uevent->attr.name, app->key.pid, ret);
+ /* TODO: free() ua_event and obj_event */
+ goto next;
+ }
+ ua_event->obj = obj_event;
+ ua_event->handle = obj_event->handle;
+ ua_event->enabled = 1;
+ } else {
+ ua_event = caa_container_of(ua_event_node,
+ struct ust_app_event, node);
+
+ if (ua_event->enabled == 0) {
+ ret = ustctl_enable(app->key.sock, ua_event->obj);
+ if (ret < 0) {
+ ERR("Error ustctl enable event %s for app "
+ "pid: %d with ret %d", uevent->attr.name,
+ app->key.pid, ret);
+ goto next;
+ }
+ ua_event->enabled = 1;
+ }
+ }
+
+ hashtable_add_unique(ua_chan->events, &ua_event->node);
+
+ DBG2("Event %s UST create successfully for pid:%d", uevent->attr.name,
+ app->key.pid);
+
+next:
+ /* Next applications */
+ hashtable_get_next(ust_app_ht, &iter);
+ }
+ rcu_read_unlock();
+
+ return ret;
+}
+
+int ust_app_start_trace(struct ltt_ust_session *usess)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter;
+ struct cds_lfht_node *node, *ua_chan_node;
+ struct ust_app *app;
+ struct ust_app_session *ua_sess;
+ struct ust_app_channel *ua_chan;
+ struct lttng_ust_channel_attr uattr;
+ struct ltt_ust_channel *uchan;
+
+ rcu_read_lock();
+ hashtable_get_first(ust_app_ht, &iter);
+ while ((node = hashtable_iter_get_node(&iter)) != NULL) {
+ app = caa_container_of(node, struct ust_app, node);
+
+ ua_sess = lookup_session_by_app(usess, app);
+ if (ua_sess == NULL) {
+ /* Only malloc can failed so something is really wrong */
+ goto next;
+ }
+
+ if (ua_sess->metadata == NULL) {
+ /* Allocate UST metadata */
+ ua_sess->metadata = trace_ust_create_metadata(usess->pathname);
+ if (ua_sess->metadata == NULL) {
+ ERR("UST app session %d creating metadata failed",
+ ua_sess->handle);
+ goto next;
+ }
+
+ uattr.overwrite = ua_sess->metadata->attr.overwrite;
+ uattr.subbuf_size = ua_sess->metadata->attr.subbuf_size;
+ uattr.num_subbuf = ua_sess->metadata->attr.num_subbuf;
+ uattr.switch_timer_interval =
+ ua_sess->metadata->attr.switch_timer_interval;
+ uattr.read_timer_interval =
+ ua_sess->metadata->attr.read_timer_interval;
+ uattr.output = ua_sess->metadata->attr.output;
+
+ /* UST tracer metadata creation */
+ ret = ustctl_open_metadata(app->key.sock, ua_sess->handle, &uattr,
+ &ua_sess->metadata->obj);
+ if (ret < 0) {
+ ERR("UST app open metadata failed for app pid:%d",
+ app->key.pid);
+ goto next;
+ }
+
+ DBG2("UST metadata opened for app pid %d", app->key.pid);
+ }
+
+ /* Open UST metadata stream */
+ if (ua_sess->metadata->stream_obj == NULL) {
+ ret = ustctl_create_stream(app->key.sock, ua_sess->metadata->obj,
+ &ua_sess->metadata->stream_obj);
+ if (ret < 0) {
+ ERR("UST create metadata stream failed");
+ goto next;
+ }
+
+ ret = snprintf(ua_sess->metadata->pathname, PATH_MAX, "%s/%s",
+ usess->pathname, "metadata");
+ if (ret < 0) {
+ PERROR("asprintf UST create stream");
+ goto next;
+ }
+
+ DBG2("UST metadata stream object created for app pid %d",
+ app->key.pid);
+ }
+
+ /* For each channel */
+ hashtable_get_first(usess->domain_global.channels, &iter);
+ while ((node = hashtable_iter_get_node(&iter)) != NULL) {
+ uchan = caa_container_of(node, struct ltt_ust_channel, node);
+
+ /* Lookup channel in the ust app session */
+ ua_chan_node = hashtable_lookup(ua_sess->channels,
+ (void *) uchan->name, strlen(uchan->name), &iter);
+ if (ua_chan_node == NULL) {
+ ERR("Channel suppose to be present with the above shallow "
+ "session copy. Continuing...");
+ goto next;
+ }
+
+ ua_chan = caa_container_of(ua_chan_node,
+ struct ust_app_channel, node);
+
+ struct ltt_ust_stream *ustream;
+
+ ustream = malloc(sizeof(*ustream));
+ if (ustream == NULL) {
+ goto next_chan;
+ }
+
+ memset(ustream, 0, sizeof(struct ltt_ust_stream));
+
+ ret = ustctl_create_stream(app->key.sock, ua_chan->obj,
+ &ustream->obj);
+ if (ret < 0) {
+ ERR("Creating channel stream failed");
+ goto next_chan;
+ }
+
+ ustream->handle = ustream->obj->handle;
+
+ hashtable_node_init(&ustream->node,
+ (void *)((unsigned long) ustream->handle), sizeof(void *));
+ hashtable_add_unique(ua_chan->streams, &ustream->node);
+
+ ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%lu",
+ uchan->pathname, uchan->name,
+ hashtable_get_count(ua_chan->streams));
+ if (ret < 0) {
+ PERROR("asprintf UST create stream");
+ goto next_chan;
+ }
+
+next_chan:
+ /* Next applications */
+ hashtable_get_next(ua_sess->channels, &iter);
+ }
+
+ /* Setup UST consumer socket and send fds to it */
+ printf("WTF HERE: sock: %d\n", usess->consumer_fd);
+ ret = ust_consumer_send_session(usess->consumer_fd, ua_sess);
+ if (ret < 0) {
+ goto next;
+ }
+
+ /* 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 next;
+ }
+
+ /* Quiescent wait after starting trace */
+ ustctl_wait_quiescent(app->key.sock);
+next:
+ /* Next applications */
+ hashtable_get_next(ust_app_ht, &iter);
+ }
+ rcu_read_unlock();
+
+ return 0;
+}
projects / lttng-tools.git / blobdiff