#include <urcu/list.h>
#include <urcu/uatomic.h>
-#include <common/buffer-view.h>
-#include <common/common.h>
-#include <common/compat/string.h>
-#include <common/defaults.h>
-#include <common/dynamic-buffer.h>
-#include <common/kernel-ctl/kernel-ctl.h>
-#include <common/payload-view.h>
-#include <common/payload.h>
-#include <common/relayd/relayd.h>
-#include <common/sessiond-comm/sessiond-comm.h>
-#include <common/string-utils/string-utils.h>
-#include <common/trace-chunk.h>
-#include <common/utils.h>
-#include <lttng/action/action-internal.h>
+#include <common/buffer-view.hpp>
+#include <common/common.hpp>
+#include <common/compat/string.hpp>
+#include <common/defaults.hpp>
+#include <common/dynamic-buffer.hpp>
+#include <common/kernel-ctl/kernel-ctl.hpp>
+#include <common/payload-view.hpp>
+#include <common/payload.hpp>
+#include <common/relayd/relayd.hpp>
+#include <common/sessiond-comm/sessiond-comm.hpp>
+#include <common/string-utils/string-utils.hpp>
+#include <common/trace-chunk.hpp>
+#include <common/utils.hpp>
+#include <lttng/action/action-internal.hpp>
#include <lttng/action/action.h>
-#include <lttng/channel-internal.h>
+#include <lttng/channel-internal.hpp>
#include <lttng/channel.h>
-#include <lttng/condition/condition-internal.h>
+#include <lttng/condition/condition-internal.hpp>
#include <lttng/condition/condition.h>
-#include <lttng/condition/event-rule-matches-internal.h>
+#include <lttng/condition/event-rule-matches-internal.hpp>
#include <lttng/condition/event-rule-matches.h>
-#include <lttng/error-query-internal.h>
-#include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/error-query-internal.hpp>
+#include <lttng/event-internal.hpp>
+#include <lttng/event-rule/event-rule-internal.hpp>
#include <lttng/event-rule/event-rule.h>
-#include <lttng/location-internal.h>
+#include <lttng/location-internal.hpp>
#include <lttng/lttng-error.h>
-#include <lttng/rotate-internal.h>
-#include <lttng/session-descriptor-internal.h>
-#include <lttng/session-internal.h>
+#include <lttng/rotate-internal.hpp>
+#include <lttng/session-descriptor-internal.hpp>
+#include <lttng/session-internal.hpp>
#include <lttng/tracker.h>
-#include <lttng/trigger/trigger-internal.h>
-#include <lttng/userspace-probe-internal.h>
-
-#include "agent-thread.h"
-#include "agent.h"
-#include "buffer-registry.h"
-#include "channel.h"
-#include "cmd.h"
-#include "consumer.h"
-#include "event-notifier-error-accounting.h"
-#include "event.h"
-#include "health-sessiond.h"
-#include "kernel-consumer.h"
-#include "kernel.h"
-#include "lttng-sessiond.h"
-#include "lttng-syscall.h"
-#include "notification-thread-commands.h"
-#include "notification-thread.h"
-#include "rotate.h"
-#include "rotation-thread.h"
-#include "session.h"
-#include "timer.h"
-#include "tracker.h"
-#include "utils.h"
+#include <lttng/trigger/trigger-internal.hpp>
+#include <lttng/userspace-probe-internal.hpp>
+
+#include "agent-thread.hpp"
+#include "agent.hpp"
+#include "buffer-registry.hpp"
+#include "channel.hpp"
+#include "cmd.hpp"
+#include "consumer.hpp"
+#include "event-notifier-error-accounting.hpp"
+#include "event.hpp"
+#include "health-sessiond.hpp"
+#include "kernel-consumer.hpp"
+#include "kernel.hpp"
+#include "lttng-sessiond.hpp"
+#include "lttng-syscall.hpp"
+#include "notification-thread-commands.hpp"
+#include "notification-thread.hpp"
+#include "rotate.hpp"
+#include "rotation-thread.hpp"
+#include "session.hpp"
+#include "timer.hpp"
+#include "tracker.hpp"
+#include "utils.hpp"
/* Sleep for 100ms between each check for the shm path's deletion. */
#define SESSION_DESTROY_SHM_PATH_CHECK_DELAY_US 100000
+static enum lttng_error_code wait_on_path(void *path);
+
+namespace {
struct cmd_destroy_session_reply_context {
int reply_sock_fd;
bool implicit_rotation_on_destroy;
enum lttng_error_code destruction_status;
};
-static enum lttng_error_code wait_on_path(void *path);
-
/*
* Command completion handler that is used by the destroy command
* when a session that has a non-default shm_path is being destroyed.
*
* See comment in cmd_destroy_session() for the rationale.
*/
-static struct destroy_completion_handler {
+struct destroy_completion_handler {
struct cmd_completion_handler handler;
char shm_path[member_sizeof(struct ltt_session, shm_path)];
} destroy_completion_handler = {
.shm_path = { 0 },
};
-static struct cmd_completion_handler *current_completion_handler;
-
/*
* Used to keep a unique index for each relayd socket created where this value
* is associated with streams on the consumer so it can match the right relayd
* to send to. It must be accessed with the relayd_net_seq_idx_lock
* held.
*/
-static pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER;
-static uint64_t relayd_net_seq_idx;
+pthread_mutex_t relayd_net_seq_idx_lock = PTHREAD_MUTEX_INITIALIZER;
+uint64_t relayd_net_seq_idx;
+} /* namespace */
+static struct cmd_completion_handler *current_completion_handler;
static int validate_ust_event_name(const char *);
static int cmd_enable_event_internal(struct ltt_session *session,
const struct lttng_domain *domain,
struct lttng_bytecode *filter,
struct lttng_event_exclusion *exclusion,
int wpipe);
+static enum lttng_error_code cmd_enable_channel_internal(
+ struct ltt_session *session,
+ const struct lttng_domain *domain,
+ const struct lttng_channel *_attr,
+ int wpipe);
/*
* Create a session path used by list_lttng_sessions for the case that the
return ret;
}
-/*
- * Fill lttng_channel array of all channels.
- */
-static ssize_t list_lttng_channels(enum lttng_domain_type domain,
- struct ltt_session *session, struct lttng_channel *channels,
- struct lttng_channel_extended *chan_exts)
-{
- int i = 0, ret = 0;
- struct ltt_kernel_channel *kchan;
-
- DBG("Listing channels for session %s", session->name);
-
- switch (domain) {
- case LTTNG_DOMAIN_KERNEL:
- /* Kernel channels */
- if (session->kernel_session != NULL) {
- cds_list_for_each_entry(kchan,
- &session->kernel_session->channel_list.head, list) {
- uint64_t discarded_events, lost_packets;
- struct lttng_channel_extended *extended;
-
- extended = (struct lttng_channel_extended *)
- kchan->channel->attr.extended.ptr;
-
- ret = get_kernel_runtime_stats(session, kchan,
- &discarded_events, &lost_packets);
- if (ret < 0) {
- goto end;
- }
- /* Copy lttng_channel struct to array */
- memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel));
- channels[i].enabled = kchan->enabled;
- chan_exts[i].discarded_events =
- discarded_events;
- chan_exts[i].lost_packets = lost_packets;
- chan_exts[i].monitor_timer_interval =
- extended->monitor_timer_interval;
- chan_exts[i].blocking_timeout = 0;
- i++;
- }
- }
- break;
- case LTTNG_DOMAIN_UST:
- {
- struct lttng_ht_iter iter;
- struct ltt_ust_channel *uchan;
-
- rcu_read_lock();
- cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht,
- &iter.iter, uchan, node.node) {
- uint64_t discarded_events = 0, lost_packets = 0;
-
- if (lttng_strncpy(channels[i].name, uchan->name,
- LTTNG_SYMBOL_NAME_LEN)) {
- break;
- }
- channels[i].attr.overwrite = uchan->attr.overwrite;
- channels[i].attr.subbuf_size = uchan->attr.subbuf_size;
- channels[i].attr.num_subbuf = uchan->attr.num_subbuf;
- channels[i].attr.switch_timer_interval =
- uchan->attr.switch_timer_interval;
- channels[i].attr.read_timer_interval =
- uchan->attr.read_timer_interval;
- channels[i].enabled = uchan->enabled;
- channels[i].attr.tracefile_size = uchan->tracefile_size;
- channels[i].attr.tracefile_count = uchan->tracefile_count;
-
- /*
- * Map enum lttng_ust_output to enum lttng_event_output.
- */
- switch (uchan->attr.output) {
- case LTTNG_UST_ABI_MMAP:
- channels[i].attr.output = LTTNG_EVENT_MMAP;
- break;
- default:
- /*
- * LTTNG_UST_MMAP is the only supported UST
- * output mode.
- */
- abort();
- break;
- }
-
- chan_exts[i].monitor_timer_interval =
- uchan->monitor_timer_interval;
- chan_exts[i].blocking_timeout =
- uchan->attr.u.s.blocking_timeout;
-
- ret = get_ust_runtime_stats(session, uchan,
- &discarded_events, &lost_packets);
- if (ret < 0) {
- break;
- }
- chan_exts[i].discarded_events = discarded_events;
- chan_exts[i].lost_packets = lost_packets;
- i++;
- }
- rcu_read_unlock();
- break;
- }
- default:
- break;
- }
-
-end:
- if (ret < 0) {
- return -LTTNG_ERR_FATAL;
- } else {
- return LTTNG_OK;
- }
-}
-
-static int append_extended_info(const char *filter_expression,
- struct lttng_event_exclusion *exclusion,
- struct lttng_userspace_probe_location *probe_location,
- struct lttng_payload *payload)
-{
- int ret = 0;
- size_t filter_len = 0;
- size_t nb_exclusions = 0;
- size_t userspace_probe_location_len = 0;
- struct lttcomm_event_extended_header extended_header = {};
- struct lttcomm_event_extended_header *p_extended_header;
- const size_t original_payload_size = payload->buffer.size;
-
- ret = lttng_dynamic_buffer_append(&payload->buffer, &extended_header,
- sizeof(extended_header));
- if (ret) {
- goto end;
- }
-
- if (filter_expression) {
- filter_len = strlen(filter_expression) + 1;
- ret = lttng_dynamic_buffer_append(&payload->buffer,
- filter_expression, filter_len);
- if (ret) {
- goto end;
- }
- }
-
- if (exclusion) {
- const size_t len = exclusion->count * LTTNG_SYMBOL_NAME_LEN;
-
- nb_exclusions = exclusion->count;
-
- ret = lttng_dynamic_buffer_append(
- &payload->buffer, &exclusion->names, len);
- if (ret) {
- goto end;
- }
- }
-
- if (probe_location) {
- const size_t size_before_probe = payload->buffer.size;
-
- ret = lttng_userspace_probe_location_serialize(probe_location,
- payload);
- if (ret < 0) {
- ret = -1;
- goto end;
- }
-
- userspace_probe_location_len =
- payload->buffer.size - size_before_probe;
- }
-
- /* Set header fields */
- p_extended_header = (struct lttcomm_event_extended_header *)
- (payload->buffer.data + original_payload_size);
-
- p_extended_header->filter_len = filter_len;
- p_extended_header->nb_exclusions = nb_exclusions;
- p_extended_header->userspace_probe_location_len =
- userspace_probe_location_len;
-
- ret = 0;
-end:
- return ret;
-}
-
/*
* Create a list of agent domain events.
*
* Return number of events in list on success or else a negative value.
*/
-static int list_lttng_agent_events(struct agent *agt,
- struct lttng_payload *payload)
+static enum lttng_error_code list_lttng_agent_events(
+ struct agent *agt, struct lttng_payload *reply_payload,
+ unsigned int *nb_events)
{
- int nb_events = 0, ret = 0;
- const struct agent_event *agent_event;
+ enum lttng_error_code ret_code;
+ int ret = 0;
+ unsigned int local_nb_events = 0;
+ struct agent_event *event;
struct lttng_ht_iter iter;
+ unsigned long agent_event_count;
- LTTNG_ASSERT(agt);
+ assert(agt);
+ assert(reply_payload);
DBG3("Listing agent events");
rcu_read_lock();
- cds_lfht_for_each_entry (
- agt->events->ht, &iter.iter, agent_event, node.node) {
- struct lttng_event event {};
+ agent_event_count = lttng_ht_get_count(agt->events);
+ if (agent_event_count == 0) {
+ /* Early exit. */
+ goto end;
+ }
- event.loglevel_type = agent_event->loglevel_type;
- event.loglevel = agent_event->loglevel_value;
- event.enabled = AGENT_EVENT_IS_ENABLED(agent_event);
+ if (agent_event_count > UINT_MAX) {
+ ret_code = LTTNG_ERR_OVERFLOW;
+ goto error;
+ }
- ret = lttng_strncpy(event.name, agent_event->name, sizeof(event.name));
- if (ret) {
- /* Internal error, invalid name. */
- ERR("Invalid event name while listing agent events: '%s' exceeds the maximal allowed length of %zu bytes",
- agent_event->name, sizeof(event.name));
- ret = -LTTNG_ERR_UNK;
- goto end;
- }
+ local_nb_events = (unsigned int) agent_event_count;
- ret = lttng_dynamic_buffer_append(
- &payload->buffer, &event, sizeof(event));
- if (ret) {
- ERR("Failed to append event to payload");
- ret = -LTTNG_ERR_NOMEM;
- goto end;
+ cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) {
+ struct lttng_event *tmp_event = lttng_event_create();
+
+ if (!tmp_event) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto error;
}
- nb_events++;
- }
+ if (lttng_strncpy(tmp_event->name, event->name, sizeof(tmp_event->name))) {
+ lttng_event_destroy(tmp_event);
+ ret_code = LTTNG_ERR_FATAL;
+ goto error;
+ }
+
+ tmp_event->name[sizeof(tmp_event->name) - 1] = '\0';
+ tmp_event->enabled = !!event->enabled_count;
+ tmp_event->loglevel = event->loglevel_value;
+ tmp_event->loglevel_type = event->loglevel_type;
- cds_lfht_for_each_entry (
- agt->events->ht, &iter.iter, agent_event, node.node) {
- /* Append extended info. */
- ret = append_extended_info(agent_event->filter_expression, NULL,
- NULL, payload);
+ ret = lttng_event_serialize(tmp_event, 0, NULL,
+ event->filter_expression, 0, NULL, reply_payload);
+ lttng_event_destroy(tmp_event);
if (ret) {
- ERR("Failed to append extended event info to payload");
- ret = -LTTNG_ERR_NOMEM;
- goto end;
+ ret_code = LTTNG_ERR_FATAL;
+ goto error;
}
}
- ret = nb_events;
end:
+ ret_code = LTTNG_OK;
+ *nb_events = local_nb_events;
+error:
rcu_read_unlock();
- return ret;
+ return ret_code;
}
/*
* Create a list of ust global domain events.
*/
-static int list_lttng_ust_global_events(char *channel_name,
+static enum lttng_error_code list_lttng_ust_global_events(char *channel_name,
struct ltt_ust_domain_global *ust_global,
- struct lttng_payload *payload)
+ struct lttng_payload *reply_payload,
+ unsigned int *nb_events)
{
- int ret = 0;
- unsigned int nb_events = 0;
+ enum lttng_error_code ret_code;
+ int ret;
struct lttng_ht_iter iter;
- const struct lttng_ht_node_str *node;
- const struct ltt_ust_channel *uchan;
- const struct ltt_ust_event *uevent;
+ struct lttng_ht_node_str *node;
+ struct ltt_ust_channel *uchan;
+ struct ltt_ust_event *uevent;
+ unsigned long channel_event_count;
+ unsigned int local_nb_events = 0;
+
+ assert(reply_payload);
+ assert(nb_events);
DBG("Listing UST global events for channel %s", channel_name);
lttng_ht_lookup(ust_global->channels, (void *) channel_name, &iter);
node = lttng_ht_iter_get_node_str(&iter);
if (node == NULL) {
- ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
- goto end;
+ ret_code = LTTNG_ERR_UST_CHAN_NOT_FOUND;
+ goto error;
}
uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node);
- DBG3("Listing UST global events");
+ channel_event_count = lttng_ht_get_count(uchan->events);
+ if (channel_event_count == 0) {
+ /* Early exit. */
+ ret_code = LTTNG_OK;
+ goto end;
+ }
+
+ if (channel_event_count > UINT_MAX) {
+ ret_code = LTTNG_ERR_OVERFLOW;
+ goto error;
+ }
+
+ local_nb_events = (unsigned int) channel_event_count;
+
+ DBG3("Listing UST global %d events", *nb_events);
cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) {
- struct lttng_event event = {};
+ struct lttng_event *tmp_event = NULL;
if (uevent->internal) {
+ /* This event should remain hidden from clients */
+ local_nb_events--;
continue;
}
- ret = lttng_strncpy(event.name, uevent->attr.name, sizeof(event.name));
- if (ret) {
- /* Internal error, invalid name. */
- ERR("Invalid event name while listing user space tracer events: '%s' exceeds the maximal allowed length of %zu bytes",
- uevent->attr.name, sizeof(event.name));
- ret = -LTTNG_ERR_UNK;
- goto end;
+ tmp_event = lttng_event_create();
+ if (!tmp_event) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto error;
}
- event.enabled = uevent->enabled;
+ if (lttng_strncpy(tmp_event->name, uevent->attr.name,
+ LTTNG_SYMBOL_NAME_LEN)) {
+ ret_code = LTTNG_ERR_FATAL;
+ lttng_event_destroy(tmp_event);
+ goto error;
+ }
+
+ tmp_event->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
+ tmp_event->enabled = uevent->enabled;
switch (uevent->attr.instrumentation) {
case LTTNG_UST_ABI_TRACEPOINT:
- event.type = LTTNG_EVENT_TRACEPOINT;
+ tmp_event->type = LTTNG_EVENT_TRACEPOINT;
break;
case LTTNG_UST_ABI_PROBE:
- event.type = LTTNG_EVENT_PROBE;
+ tmp_event->type = LTTNG_EVENT_PROBE;
break;
case LTTNG_UST_ABI_FUNCTION:
- event.type = LTTNG_EVENT_FUNCTION;
+ tmp_event->type = LTTNG_EVENT_FUNCTION;
break;
}
- event.loglevel = uevent->attr.loglevel;
+ tmp_event->loglevel = uevent->attr.loglevel;
switch (uevent->attr.loglevel_type) {
case LTTNG_UST_ABI_LOGLEVEL_ALL:
- event.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
+ tmp_event->loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
break;
case LTTNG_UST_ABI_LOGLEVEL_RANGE:
- event.loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
+ tmp_event->loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
break;
case LTTNG_UST_ABI_LOGLEVEL_SINGLE:
- event.loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
+ tmp_event->loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
break;
}
-
if (uevent->filter) {
- event.filter = 1;
+ tmp_event->filter = 1;
}
-
if (uevent->exclusion) {
- event.exclusion = 1;
- }
-
- ret = lttng_dynamic_buffer_append(&payload->buffer, &event, sizeof(event));
- if (ret) {
- ERR("Failed to append event to payload");
- ret = -LTTNG_ERR_NOMEM;
- goto end;
+ tmp_event->exclusion = 1;
}
- nb_events++;
- }
-
- cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) {
- /* Append extended info. */
- ret = append_extended_info(uevent->filter_expression,
- uevent->exclusion, NULL, payload);
+ /*
+ * We do not care about the filter bytecode and the fd from the
+ * userspace_probe_location.
+ */
+ ret = lttng_event_serialize(tmp_event, uevent->exclusion ? uevent->exclusion->count : 0,
+ uevent->exclusion ? (char **) uevent->exclusion ->names : NULL,
+ uevent->filter_expression, 0, NULL, reply_payload);
+ lttng_event_destroy(tmp_event);
if (ret) {
- ERR("Failed to append extended event info to payload");
- ret = -LTTNG_ERR_FATAL;
- goto end;
+ ret_code = LTTNG_ERR_FATAL;
+ goto error;
}
}
- ret = nb_events;
end:
+ /* nb_events is already set at this point. */
+ ret_code = LTTNG_OK;
+ *nb_events = local_nb_events;
+error:
rcu_read_unlock();
- return ret;
+ return ret_code;
}
/*
* Fill lttng_event array of all kernel events in the channel.
*/
-static int list_lttng_kernel_events(char *channel_name,
+static enum lttng_error_code list_lttng_kernel_events(char *channel_name,
struct ltt_kernel_session *kernel_session,
- struct lttng_payload *payload)
+ struct lttng_payload *reply_payload,
+ unsigned int *nb_events)
{
+ enum lttng_error_code ret_code;
int ret;
- unsigned int nb_event;
- const struct ltt_kernel_event *kevent;
- const struct ltt_kernel_channel *kchan;
+ struct ltt_kernel_event *event;
+ struct ltt_kernel_channel *kchan;
+
+ assert(reply_payload);
kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session);
if (kchan == NULL) {
- ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND;
- goto error;
+ ret_code = LTTNG_ERR_KERN_CHAN_NOT_FOUND;
+ goto end;
}
- nb_event = kchan->event_count;
+ *nb_events = kchan->event_count;
DBG("Listing events for channel %s", kchan->channel->name);
+ if (*nb_events == 0) {
+ ret_code = LTTNG_OK;
+ goto end;
+ }
+
/* Kernel channels */
- cds_list_for_each_entry(kevent, &kchan->events_list.head , list) {
- struct lttng_event event = {};
+ cds_list_for_each_entry(event, &kchan->events_list.head , list) {
+ struct lttng_event *tmp_event = lttng_event_create();
- ret = lttng_strncpy(event.name, kevent->event->name, sizeof(event.name));
- if (ret) {
- /* Internal error, invalid name. */
- ERR("Invalid event name while listing kernel events: '%s' exceeds the maximal allowed length of %zu bytes",
- kevent->event->name,
- sizeof(event.name));
- ret = -LTTNG_ERR_UNK;
+ if (!tmp_event) {
+ ret_code = LTTNG_ERR_NOMEM;
goto end;
}
- event.enabled = kevent->enabled;
- event.filter = (unsigned char) !!kevent->filter_expression;
+ if (lttng_strncpy(tmp_event->name, event->event->name, LTTNG_SYMBOL_NAME_LEN)) {
+ lttng_event_destroy(tmp_event);
+ ret_code = LTTNG_ERR_FATAL;
+ goto end;
- switch (kevent->event->instrumentation) {
+ }
+
+ tmp_event->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
+ tmp_event->enabled = event->enabled;
+ tmp_event->filter = (unsigned char) !!event->filter_expression;
+
+ switch (event->event->instrumentation) {
case LTTNG_KERNEL_ABI_TRACEPOINT:
- event.type = LTTNG_EVENT_TRACEPOINT;
+ tmp_event->type = LTTNG_EVENT_TRACEPOINT;
break;
case LTTNG_KERNEL_ABI_KRETPROBE:
- event.type = LTTNG_EVENT_FUNCTION;
- memcpy(&event.attr.probe, &kevent->event->u.kprobe,
+ tmp_event->type = LTTNG_EVENT_FUNCTION;
+ memcpy(&tmp_event->attr.probe, &event->event->u.kprobe,
sizeof(struct lttng_kernel_abi_kprobe));
break;
case LTTNG_KERNEL_ABI_KPROBE:
- event.type = LTTNG_EVENT_PROBE;
- memcpy(&event.attr.probe, &kevent->event->u.kprobe,
+ tmp_event->type = LTTNG_EVENT_PROBE;
+ memcpy(&tmp_event->attr.probe, &event->event->u.kprobe,
sizeof(struct lttng_kernel_abi_kprobe));
break;
case LTTNG_KERNEL_ABI_UPROBE:
- event.type = LTTNG_EVENT_USERSPACE_PROBE;
+ tmp_event->type = LTTNG_EVENT_USERSPACE_PROBE;
break;
case LTTNG_KERNEL_ABI_FUNCTION:
- event.type = LTTNG_EVENT_FUNCTION;
- memcpy(&event.attr.ftrace, &kevent->event->u.ftrace,
+ tmp_event->type = LTTNG_EVENT_FUNCTION;
+ memcpy(&(tmp_event->attr.ftrace), &event->event->u.ftrace,
sizeof(struct lttng_kernel_abi_function));
break;
case LTTNG_KERNEL_ABI_NOOP:
- event.type = LTTNG_EVENT_NOOP;
+ tmp_event->type = LTTNG_EVENT_NOOP;
break;
case LTTNG_KERNEL_ABI_SYSCALL:
- event.type = LTTNG_EVENT_SYSCALL;
+ tmp_event->type = LTTNG_EVENT_SYSCALL;
break;
case LTTNG_KERNEL_ABI_ALL:
/* fall-through. */
break;
}
- ret = lttng_dynamic_buffer_append(
- &payload->buffer, &event, sizeof(event));
- if (ret) {
- ERR("Failed to append event to payload");
- ret = -LTTNG_ERR_NOMEM;
- goto end;
+ if (event->userspace_probe_location) {
+ struct lttng_userspace_probe_location *location_copy =
+ lttng_userspace_probe_location_copy(
+ event->userspace_probe_location);
+
+ if (!location_copy) {
+ lttng_event_destroy(tmp_event);
+ ret_code = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ ret = lttng_event_set_userspace_probe_location(
+ tmp_event, location_copy);
+ if (ret) {
+ lttng_event_destroy(tmp_event);
+ lttng_userspace_probe_location_destroy(
+ location_copy);
+ ret_code = LTTNG_ERR_INVALID;
+ goto end;
+ }
}
- }
- cds_list_for_each_entry(kevent, &kchan->events_list.head , list) {
- /* Append extended info. */
- ret = append_extended_info(kevent->filter_expression, NULL,
- kevent->userspace_probe_location, payload);
+ ret = lttng_event_serialize(tmp_event, 0, NULL,
+ event->filter_expression, 0, NULL, reply_payload);
+ lttng_event_destroy(tmp_event);
if (ret) {
- DBG("Error appending extended info message");
- ret = -LTTNG_ERR_FATAL;
- goto error;
+ ret_code = LTTNG_ERR_FATAL;
+ goto end;
}
}
+ ret_code = LTTNG_OK;
end:
- return nb_event;
-error:
- return ret;
+ return ret_code;
}
/*
* Returns LTTNG_OK, or an LTTng error code on failure.
*/
static enum lttng_error_code send_consumer_relayd_sockets(
- enum lttng_domain_type domain,
unsigned int session_id, struct consumer_output *consumer,
struct consumer_socket *sock, const char *session_name,
const char *hostname, const char *base_path, int session_live_timer,
cds_lfht_for_each_entry(usess->consumer->socks->ht, &iter.iter,
socket, node.node) {
pthread_mutex_lock(socket->lock);
- ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_UST, session->id,
+ ret = send_consumer_relayd_sockets(session->id,
usess->consumer, socket,
session->name, session->hostname,
session->base_path,
cds_lfht_for_each_entry(ksess->consumer->socks->ht, &iter.iter,
socket, node.node) {
pthread_mutex_lock(socket->lock);
- ret = send_consumer_relayd_sockets(LTTNG_DOMAIN_KERNEL, session->id,
+ ret = send_consumer_relayd_sockets(session->id,
ksess->consumer, socket,
session->name, session->hostname,
session->base_path,
*
* The wpipe arguments is used as a notifier for the kernel thread.
*/
-int cmd_enable_channel(struct ltt_session *session,
- const struct lttng_domain *domain, const struct lttng_channel *_attr, int wpipe)
+int cmd_enable_channel(struct command_ctx *cmd_ctx, int sock, int wpipe)
{
int ret;
+ size_t channel_len;
+ ssize_t sock_recv_len;
+ struct lttng_channel *channel = NULL;
+ struct lttng_buffer_view view;
+ struct lttng_dynamic_buffer channel_buffer;
+ const struct lttng_domain command_domain = cmd_ctx->lsm.domain;
+
+ lttng_dynamic_buffer_init(&channel_buffer);
+ channel_len = (size_t) cmd_ctx->lsm.u.channel.length;
+ ret = lttng_dynamic_buffer_set_size(&channel_buffer, channel_len);
+ if (ret) {
+ ret = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ sock_recv_len = lttcomm_recv_unix_sock(sock, channel_buffer.data,
+ channel_len);
+ if (sock_recv_len < 0 || sock_recv_len != channel_len) {
+ ERR("Failed to receive \"enable channel\" command payload");
+ ret = LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ view = lttng_buffer_view_from_dynamic_buffer(&channel_buffer, 0, channel_len);
+ if (!lttng_buffer_view_is_valid(&view)) {
+ ret = LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ if (lttng_channel_create_from_buffer(&view, &channel) != channel_len) {
+ ERR("Invalid channel payload received in \"enable channel\" command");
+ ret = LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ ret = cmd_enable_channel_internal(
+ cmd_ctx->session, &command_domain, channel, wpipe);
+
+end:
+ lttng_dynamic_buffer_reset(&channel_buffer);
+ lttng_channel_destroy(channel);
+ return ret;
+}
+
+static enum lttng_error_code cmd_enable_channel_internal(
+ struct ltt_session *session,
+ const struct lttng_domain *domain,
+ const struct lttng_channel *_attr,
+ int wpipe)
+{
+ enum lttng_error_code ret_code;
struct ltt_ust_session *usess = session->ust_session;
struct lttng_ht *chan_ht;
size_t len;
- struct lttng_channel attr;
+ struct lttng_channel *attr = NULL;
LTTNG_ASSERT(session);
LTTNG_ASSERT(_attr);
LTTNG_ASSERT(domain);
- attr = *_attr;
- len = lttng_strnlen(attr.name, sizeof(attr.name));
+ attr = lttng_channel_copy(_attr);
+ if (!attr) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ len = lttng_strnlen(attr->name, sizeof(attr->name));
/* Validate channel name */
- if (attr.name[0] == '.' ||
- memchr(attr.name, '/', len) != NULL) {
- ret = LTTNG_ERR_INVALID_CHANNEL_NAME;
+ if (attr->name[0] == '.' ||
+ memchr(attr->name, '/', len) != NULL) {
+ ret_code = LTTNG_ERR_INVALID_CHANNEL_NAME;
goto end;
}
- DBG("Enabling channel %s for session %s", attr.name, session->name);
+ DBG("Enabling channel %s for session %s", attr->name, session->name);
rcu_read_lock();
* beacons for inactive streams.
*/
if (session->live_timer > 0) {
- attr.attr.live_timer_interval = session->live_timer;
- attr.attr.switch_timer_interval = 0;
+ attr->attr.live_timer_interval = session->live_timer;
+ attr->attr.switch_timer_interval = 0;
}
/* Check for feature support */
WARN("Kernel tracer does not support buffer monitoring. "
"Setting the monitor interval timer to 0 "
"(disabled) for channel '%s' of session '%s'",
- attr.name, session->name);
- lttng_channel_set_monitor_timer_interval(&attr, 0);
+ attr->name, session->name);
+ lttng_channel_set_monitor_timer_interval(attr, 0);
}
break;
}
case LTTNG_DOMAIN_PYTHON:
if (!agent_tracing_is_enabled()) {
DBG("Attempted to enable a channel in an agent domain but the agent thread is not running");
- ret = LTTNG_ERR_AGENT_TRACING_DISABLED;
+ ret_code = LTTNG_ERR_AGENT_TRACING_DISABLED;
goto error;
}
break;
default:
- ret = LTTNG_ERR_UNKNOWN_DOMAIN;
+ ret_code = LTTNG_ERR_UNKNOWN_DOMAIN;
goto error;
}
{
struct ltt_kernel_channel *kchan;
- kchan = trace_kernel_get_channel_by_name(attr.name,
- session->kernel_session);
+ kchan = trace_kernel_get_channel_by_name(
+ attr->name, session->kernel_session);
if (kchan == NULL) {
/*
* Don't try to create a channel if the session has been started at
* some point in time before. The tracer does not allow it.
*/
if (session->has_been_started) {
- ret = LTTNG_ERR_TRACE_ALREADY_STARTED;
+ ret_code = LTTNG_ERR_TRACE_ALREADY_STARTED;
goto error;
}
if (session->snapshot.nb_output > 0 ||
session->snapshot_mode) {
/* Enforce mmap output for snapshot sessions. */
- attr.attr.output = LTTNG_EVENT_MMAP;
+ attr->attr.output = LTTNG_EVENT_MMAP;
}
- ret = channel_kernel_create(session->kernel_session, &attr, wpipe);
- if (attr.name[0] != '\0') {
+ ret_code = channel_kernel_create(
+ session->kernel_session, attr, wpipe);
+ if (attr->name[0] != '\0') {
session->kernel_session->has_non_default_channel = 1;
}
} else {
- ret = channel_kernel_enable(session->kernel_session, kchan);
+ ret_code = channel_kernel_enable(session->kernel_session, kchan);
}
- if (ret != LTTNG_OK) {
+ if (ret_code != LTTNG_OK) {
goto error;
}
* adhered to.
*/
if (domain->type == LTTNG_DOMAIN_JUL) {
- if (strncmp(attr.name, DEFAULT_JUL_CHANNEL_NAME,
+ if (strncmp(attr->name, DEFAULT_JUL_CHANNEL_NAME,
LTTNG_SYMBOL_NAME_LEN)) {
- ret = LTTNG_ERR_INVALID_CHANNEL_NAME;
+ ret_code = LTTNG_ERR_INVALID_CHANNEL_NAME;
goto error;
}
} else if (domain->type == LTTNG_DOMAIN_LOG4J) {
- if (strncmp(attr.name, DEFAULT_LOG4J_CHANNEL_NAME,
+ if (strncmp(attr->name, DEFAULT_LOG4J_CHANNEL_NAME,
LTTNG_SYMBOL_NAME_LEN)) {
- ret = LTTNG_ERR_INVALID_CHANNEL_NAME;
+ ret_code = LTTNG_ERR_INVALID_CHANNEL_NAME;
goto error;
}
} else if (domain->type == LTTNG_DOMAIN_PYTHON) {
- if (strncmp(attr.name, DEFAULT_PYTHON_CHANNEL_NAME,
+ if (strncmp(attr->name, DEFAULT_PYTHON_CHANNEL_NAME,
LTTNG_SYMBOL_NAME_LEN)) {
- ret = LTTNG_ERR_INVALID_CHANNEL_NAME;
+ ret_code = LTTNG_ERR_INVALID_CHANNEL_NAME;
goto error;
}
}
chan_ht = usess->domain_global.channels;
- uchan = trace_ust_find_channel_by_name(chan_ht, attr.name);
+ uchan = trace_ust_find_channel_by_name(chan_ht, attr->name);
if (uchan == NULL) {
/*
* Don't try to create a channel if the session has been started at
* some point in time before. The tracer does not allow it.
*/
if (session->has_been_started) {
- ret = LTTNG_ERR_TRACE_ALREADY_STARTED;
+ ret_code = LTTNG_ERR_TRACE_ALREADY_STARTED;
goto error;
}
- ret = channel_ust_create(usess, &attr, domain->buf_type);
- if (attr.name[0] != '\0') {
+ ret_code = channel_ust_create(usess, attr, domain->buf_type);
+ if (attr->name[0] != '\0') {
usess->has_non_default_channel = 1;
}
} else {
- ret = channel_ust_enable(usess, uchan);
+ ret_code = channel_ust_enable(usess, uchan);
}
break;
}
default:
- ret = LTTNG_ERR_UNKNOWN_DOMAIN;
+ ret_code = LTTNG_ERR_UNKNOWN_DOMAIN;
goto error;
}
- if (ret == LTTNG_OK && attr.attr.output != LTTNG_EVENT_MMAP) {
+ if (ret_code == LTTNG_OK && attr->attr.output != LTTNG_EVENT_MMAP) {
session->has_non_mmap_channel = true;
}
error:
rcu_read_unlock();
end:
- return ret;
+ lttng_channel_destroy(attr);
+ return ret_code;
}
enum lttng_error_code cmd_process_attr_tracker_get_tracking_policy(
/*
* Command LTTNG_DISABLE_EVENT processed by the client thread.
*/
-int cmd_disable_event(struct ltt_session *session,
- enum lttng_domain_type domain, const char *channel_name,
- const struct lttng_event *event)
+int cmd_disable_event(struct command_ctx *cmd_ctx,
+ struct lttng_event *event,
+ char *filter_expression,
+ struct lttng_bytecode *bytecode,
+ struct lttng_event_exclusion *exclusion)
{
int ret;
const char *event_name;
+ const struct ltt_session *session = cmd_ctx->session;
+ const char *channel_name = cmd_ctx->lsm.u.disable.channel_name;
+ const enum lttng_domain_type domain = cmd_ctx->lsm.domain.type;
DBG("Disable event command for event \'%s\'", event->name);
+ /*
+ * Filter and exclusions are simply not handled by the
+ * disable event command at this time.
+ *
+ * FIXME
+ */
+ (void) filter_expression;
+ (void) exclusion;
+
+ /* Ignore the presence of filter or exclusion for the event */
+ event->filter = 0;
+ event->exclusion = 0;
+
event_name = event->name;
/* Error out on unhandled search criteria */
error_unlock:
rcu_read_unlock();
error:
+ free(exclusion);
+ free(bytecode);
+ free(filter_expression);
return ret;
}
/*
* Command LTTNG_ADD_CONTEXT processed by the client thread.
*/
-int cmd_add_context(struct ltt_session *session, enum lttng_domain_type domain,
- char *channel_name, const struct lttng_event_context *ctx, int kwpipe)
+int cmd_add_context(struct command_ctx *cmd_ctx,
+ const struct lttng_event_context *event_context, int kwpipe)
{
int ret, chan_kern_created = 0, chan_ust_created = 0;
- char *app_ctx_provider_name = NULL, *app_ctx_name = NULL;
+ const enum lttng_domain_type domain = cmd_ctx->lsm.domain.type;
+ const struct ltt_session *session = cmd_ctx->session;
+ const char *channel_name = cmd_ctx->lsm.u.context.channel_name;
/*
* Don't try to add a context if the session has been started at
* some point in time before. The tracer does not allow it and would
* result in a corrupted trace.
*/
- if (session->has_been_started) {
+ if (cmd_ctx->session->has_been_started) {
ret = LTTNG_ERR_TRACE_ALREADY_STARTED;
goto end;
}
- if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) {
- app_ctx_provider_name = ctx->u.app_ctx.provider_name;
- app_ctx_name = ctx->u.app_ctx.ctx_name;
- }
-
switch (domain) {
case LTTNG_DOMAIN_KERNEL:
LTTNG_ASSERT(session->kernel_session);
chan_kern_created = 1;
}
/* Add kernel context to kernel tracer */
- ret = context_kernel_add(session->kernel_session, ctx, channel_name);
+ ret = context_kernel_add(session->kernel_session,
+ event_context, channel_name);
if (ret != LTTNG_OK) {
goto error;
}
ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
goto error;
}
- /* break is _not_ missing here. */
}
+ /* fall through */
case LTTNG_DOMAIN_UST:
{
struct ltt_ust_session *usess = session->ust_session;
chan_ust_created = 1;
}
- ret = context_ust_add(usess, domain, ctx, channel_name);
- free(app_ctx_provider_name);
- free(app_ctx_name);
- app_ctx_name = NULL;
- app_ctx_provider_name = NULL;
+ ret = context_ust_add(usess, domain, event_context,
+ channel_name);
if (ret != LTTNG_OK) {
goto error;
}
trace_ust_destroy_channel(uchan);
}
end:
- free(app_ctx_provider_name);
- free(app_ctx_name);
return ret;
}
goto error;
}
- ret = cmd_enable_channel(session, domain, attr, wpipe);
+ ret = cmd_enable_channel_internal(
+ session, domain, attr, wpipe);
if (ret != LTTNG_OK) {
goto error;
}
}
}
if (filter) {
- filter_a = (lttng_bytecode *) zmalloc(sizeof(*filter_a) + filter->len);
+ filter_a = zmalloc<lttng_bytecode>(sizeof(*filter_a) + filter->len);
if (!filter_a) {
free(filter_expression_a);
ret = LTTNG_ERR_FATAL;
goto error;
}
- ret = cmd_enable_channel(session, domain, attr, wpipe);
+ ret = cmd_enable_channel_internal(
+ session, domain, attr, wpipe);
if (ret != LTTNG_OK) {
goto error;
}
struct lttng_bytecode)
+ filter->len;
- filter_copy = (lttng_bytecode *) zmalloc(filter_size);
+ filter_copy = zmalloc<lttng_bytecode>(filter_size);
if (!filter_copy) {
ret = LTTNG_ERR_NOMEM;
goto error;
* Command LTTNG_ENABLE_EVENT processed by the client thread.
* We own filter, exclusion, and filter_expression.
*/
-int cmd_enable_event(struct ltt_session *session,
- const struct lttng_domain *domain,
- char *channel_name, struct lttng_event *event,
+int cmd_enable_event(struct command_ctx *cmd_ctx,
+ struct lttng_event *event,
char *filter_expression,
- struct lttng_bytecode *filter,
struct lttng_event_exclusion *exclusion,
+ struct lttng_bytecode *bytecode,
int wpipe)
{
- return _cmd_enable_event(session, domain, channel_name, event,
- filter_expression, filter, exclusion, wpipe, false);
+ int ret;
+ /*
+ * Copied to ensure proper alignment since 'lsm' is a packed structure.
+ */
+ const lttng_domain command_domain = cmd_ctx->lsm.domain;
+
+ /*
+ * The ownership of the following parameters is transferred to
+ * _cmd_enable_event:
+ *
+ * - filter_expression,
+ * - bytecode,
+ * - exclusion
+ */
+ ret = _cmd_enable_event(cmd_ctx->session,
+ &command_domain,
+ cmd_ctx->lsm.u.enable.channel_name, event,
+ filter_expression, bytecode, exclusion, wpipe, false);
+ filter_expression = NULL;
+ bytecode = NULL;
+ exclusion = NULL;
+ return ret;
}
/*
/*
* Command LTTNG_LIST_TRACEPOINTS processed by the client thread.
*/
-ssize_t cmd_list_tracepoints(enum lttng_domain_type domain,
- struct lttng_event **events)
+enum lttng_error_code cmd_list_tracepoints(enum lttng_domain_type domain,
+ struct lttng_payload *reply_payload)
{
+ enum lttng_error_code ret_code;
int ret;
- ssize_t nb_events = 0;
+ ssize_t i, nb_events = 0;
+ struct lttng_event *events = NULL;
+ struct lttcomm_list_command_header reply_command_header = {};
+ size_t reply_command_header_offset;
+
+ assert(reply_payload);
+
+ /* Reserve space for command reply header. */
+ reply_command_header_offset = reply_payload->buffer.size;
+ ret = lttng_dynamic_buffer_set_size(&reply_payload->buffer,
+ reply_command_header_offset +
+ sizeof(struct lttcomm_list_command_header));
+ if (ret) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto error;
+ }
switch (domain) {
case LTTNG_DOMAIN_KERNEL:
- nb_events = kernel_list_events(events);
+ nb_events = kernel_list_events(&events);
if (nb_events < 0) {
- ret = LTTNG_ERR_KERN_LIST_FAIL;
+ ret_code = LTTNG_ERR_KERN_LIST_FAIL;
goto error;
}
break;
case LTTNG_DOMAIN_UST:
- nb_events = ust_app_list_events(events);
+ nb_events = ust_app_list_events(&events);
if (nb_events < 0) {
- ret = LTTNG_ERR_UST_LIST_FAIL;
+ ret_code = LTTNG_ERR_UST_LIST_FAIL;
goto error;
}
break;
case LTTNG_DOMAIN_LOG4J:
case LTTNG_DOMAIN_JUL:
case LTTNG_DOMAIN_PYTHON:
- nb_events = agent_list_events(events, domain);
+ nb_events = agent_list_events(&events, domain);
if (nb_events < 0) {
- ret = LTTNG_ERR_UST_LIST_FAIL;
+ ret_code = LTTNG_ERR_UST_LIST_FAIL;
goto error;
}
break;
default:
- ret = LTTNG_ERR_UND;
+ ret_code = LTTNG_ERR_UND;
+ goto error;
+ }
+
+ for (i = 0; i < nb_events; i++) {
+ ret = lttng_event_serialize(&events[i], 0, NULL, NULL, 0, NULL,
+ reply_payload);
+ if (ret) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto error;
+ }
+ }
+
+ if (nb_events > UINT32_MAX) {
+ ERR("Tracepoint count would overflow the tracepoint listing command's reply");
+ ret_code = LTTNG_ERR_OVERFLOW;
goto error;
}
- return nb_events;
+ /* Update command reply header. */
+ reply_command_header.count = (uint32_t) nb_events;
+ memcpy(reply_payload->buffer.data + reply_command_header_offset, &reply_command_header,
+ sizeof(reply_command_header));
+ ret_code = LTTNG_OK;
error:
- /* Return negative value to differentiate return code */
- return -ret;
+ free(events);
+ return ret_code;
}
/*
* Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread.
*/
-ssize_t cmd_list_tracepoint_fields(enum lttng_domain_type domain,
- struct lttng_event_field **fields)
+enum lttng_error_code cmd_list_tracepoint_fields(enum lttng_domain_type domain,
+ struct lttng_payload *reply)
{
+ enum lttng_error_code ret_code;
int ret;
- ssize_t nb_fields = 0;
+ unsigned int i, nb_fields;
+ struct lttng_event_field *fields = NULL;
+ struct lttcomm_list_command_header reply_command_header = {};
+ size_t reply_command_header_offset;
+
+ assert(reply);
+
+ /* Reserve space for command reply header. */
+ reply_command_header_offset = reply->buffer.size;
+ ret = lttng_dynamic_buffer_set_size(&reply->buffer,
+ reply_command_header_offset +
+ sizeof(struct lttcomm_list_command_header));
+ if (ret) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto error;
+ }
switch (domain) {
case LTTNG_DOMAIN_UST:
- nb_fields = ust_app_list_event_fields(fields);
- if (nb_fields < 0) {
- ret = LTTNG_ERR_UST_LIST_FAIL;
+ ret = ust_app_list_event_fields(&fields);
+ if (ret < 0) {
+ ret_code = LTTNG_ERR_UST_LIST_FAIL;
goto error;
}
+
break;
case LTTNG_DOMAIN_KERNEL:
default: /* fall-through */
- ret = LTTNG_ERR_UND;
+ ret_code = LTTNG_ERR_UND;
goto error;
}
- return nb_fields;
+ nb_fields = ret;
+
+ for (i = 0; i < nb_fields; i++) {
+ ret = lttng_event_field_serialize(&fields[i], reply);
+ if (ret) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto error;
+ }
+ }
+
+ if (nb_fields > UINT32_MAX) {
+ ERR("Tracepoint field count would overflow the tracepoint field listing command's reply");
+ ret_code = LTTNG_ERR_OVERFLOW;
+ goto error;
+ }
+
+ /* Update command reply header. */
+ reply_command_header.count = (uint32_t) nb_fields;
+
+ memcpy(reply->buffer.data + reply_command_header_offset, &reply_command_header,
+ sizeof(reply_command_header));
+
+ ret_code = LTTNG_OK;
error:
- /* Return negative value to differentiate return code */
- return -ret;
+ free(fields);
+ return ret_code;
}
-ssize_t cmd_list_syscalls(struct lttng_event **events)
+enum lttng_error_code cmd_list_syscalls(
+ struct lttng_payload *reply_payload)
{
- return syscall_table_list(events);
+ enum lttng_error_code ret_code;
+ ssize_t nb_events, i;
+ int ret;
+ struct lttng_event *events = NULL;
+ struct lttcomm_list_command_header reply_command_header = {};
+ size_t reply_command_header_offset;
+
+ assert(reply_payload);
+
+ /* Reserve space for command reply header. */
+ reply_command_header_offset = reply_payload->buffer.size;
+ ret = lttng_dynamic_buffer_set_size(&reply_payload->buffer,
+ reply_command_header_offset +
+ sizeof(struct lttcomm_list_command_header));
+ if (ret) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ nb_events = syscall_table_list(&events);
+ if (nb_events < 0) {
+ ret_code = (enum lttng_error_code) -nb_events;
+ goto end;
+ }
+
+ for (i = 0; i < nb_events; i++) {
+ ret = lttng_event_serialize(&events[i], 0, NULL, NULL, 0, NULL,
+ reply_payload);
+ if (ret) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+ }
+
+ if (nb_events > UINT32_MAX) {
+ ERR("Syscall count would overflow the syscall listing command's reply");
+ ret_code = LTTNG_ERR_OVERFLOW;
+ goto end;
+ }
+
+ /* Update command reply header. */
+ reply_command_header.count = (uint32_t) nb_events;
+ memcpy(reply_payload->buffer.data + reply_command_header_offset, &reply_command_header,
+ sizeof(reply_command_header));
+
+ ret_code = LTTNG_OK;
+end:
+ free(events);
+ return ret_code;
}
/*
*/
session->rotated_after_last_stop = false;
- if (session->rotate_timer_period) {
+ if (session->rotate_timer_period && !session->rotation_schedule_timer_enabled) {
int int_ret = timer_session_rotation_schedule_timer_start(
session, session->rotate_timer_period);
.cmd_header_size =
sizeof(struct lttcomm_session_destroy_command_header),
.data_size = 0,
+ .fd_count = 0,
};
size_t payload_size_before_location;
struct cmd_destroy_session_reply_context *reply_context = NULL;
if (sock_fd) {
- reply_context = (cmd_destroy_session_reply_context *) zmalloc(sizeof(*reply_context));
+ reply_context = zmalloc<cmd_destroy_session_reply_context>();
if (!reply_context) {
ret = LTTNG_ERR_NOMEM;
goto end;
}
+
reply_context->reply_sock_fd = *sock_fd;
}
goto error;
}
- socket->lock = (pthread_mutex_t *) zmalloc(sizeof(pthread_mutex_t));
+ socket->lock = zmalloc<pthread_mutex_t>();
if (socket->lock == NULL) {
PERROR("zmalloc pthread mutex");
ret = LTTNG_ERR_FATAL;
goto error;
}
+
pthread_mutex_init(socket->lock, NULL);
socket->registered = 1;
goto end;
}
- *domains = (lttng_domain *) zmalloc(nb_dom * sizeof(struct lttng_domain));
+ *domains = calloc<lttng_domain>(nb_dom);
if (*domains == NULL) {
ret = LTTNG_ERR_FATAL;
goto error;
/*
* Command LTTNG_LIST_CHANNELS processed by the client thread.
*/
-ssize_t cmd_list_channels(enum lttng_domain_type domain,
- struct ltt_session *session, struct lttng_channel **channels)
+enum lttng_error_code cmd_list_channels(enum lttng_domain_type domain,
+ struct ltt_session *session,
+ struct lttng_payload *payload)
{
- ssize_t nb_chan = 0, payload_size = 0, ret;
+ int ret = 0;
+ unsigned int i = 0;
+ struct lttcomm_list_command_header cmd_header = {};
+ size_t cmd_header_offset;
+ enum lttng_error_code ret_code;
+
+ assert(session);
+ assert(payload);
+
+ DBG("Listing channels for session %s", session->name);
+
+ cmd_header_offset = payload->buffer.size;
+
+ /* Reserve space for command reply header. */
+ ret = lttng_dynamic_buffer_set_size(&payload->buffer,
+ cmd_header_offset + sizeof(cmd_header));
+ if (ret) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto end;
+ }
switch (domain) {
case LTTNG_DOMAIN_KERNEL:
+ {
+ /* Kernel channels */
+ struct ltt_kernel_channel *kchan;
if (session->kernel_session != NULL) {
- nb_chan = session->kernel_session->channel_count;
- }
- DBG3("Number of kernel channels %zd", nb_chan);
- if (nb_chan <= 0) {
- ret = -LTTNG_ERR_KERN_CHAN_NOT_FOUND;
- goto end;
+ cds_list_for_each_entry(kchan,
+ &session->kernel_session->channel_list.head, list) {
+ uint64_t discarded_events, lost_packets;
+ struct lttng_channel_extended *extended;
+
+ extended = (struct lttng_channel_extended *)
+ kchan->channel->attr.extended.ptr;
+
+ ret = get_kernel_runtime_stats(session, kchan,
+ &discarded_events, &lost_packets);
+ if (ret < 0) {
+ ret_code = LTTNG_ERR_UNK;
+ goto end;
+ }
+
+ /*
+ * Update the discarded_events and lost_packets
+ * count for the channel
+ */
+ extended->discarded_events = discarded_events;
+ extended->lost_packets = lost_packets;
+
+ ret = lttng_channel_serialize(
+ kchan->channel, &payload->buffer);
+ if (ret) {
+ ERR("Failed to serialize lttng_channel: channel name = '%s'",
+ kchan->channel->name);
+ ret_code = LTTNG_ERR_UNK;
+ goto end;
+ }
+
+ i++;
+ }
}
break;
+ }
case LTTNG_DOMAIN_UST:
- if (session->ust_session != NULL) {
- rcu_read_lock();
- nb_chan = lttng_ht_get_count(
- session->ust_session->domain_global.channels);
- rcu_read_unlock();
- }
- DBG3("Number of UST global channels %zd", nb_chan);
- if (nb_chan < 0) {
- ret = -LTTNG_ERR_UST_CHAN_NOT_FOUND;
- goto end;
+ {
+ struct lttng_ht_iter iter;
+ struct ltt_ust_channel *uchan;
+
+ rcu_read_lock();
+ cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht,
+ &iter.iter, uchan, node.node) {
+ uint64_t discarded_events = 0, lost_packets = 0;
+ struct lttng_channel *channel = NULL;
+ struct lttng_channel_extended *extended;
+
+ channel = trace_ust_channel_to_lttng_channel(uchan);
+ if (!channel) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ extended = (struct lttng_channel_extended *)
+ channel->attr.extended.ptr;
+
+ ret = get_ust_runtime_stats(session, uchan,
+ &discarded_events, &lost_packets);
+ if (ret < 0) {
+ lttng_channel_destroy(channel);
+ ret_code = LTTNG_ERR_UNK;
+ goto end;
+ }
+
+ extended->discarded_events = discarded_events;
+ extended->lost_packets = lost_packets;
+
+ ret = lttng_channel_serialize(
+ channel, &payload->buffer);
+ if (ret) {
+ ERR("Failed to serialize lttng_channel: channel name = '%s'",
+ channel->name);
+ lttng_channel_destroy(channel);
+ ret_code = LTTNG_ERR_UNK;
+ goto end;
+ }
+
+ lttng_channel_destroy(channel);
+ i++;
}
+ rcu_read_unlock();
break;
+ }
default:
- ret = -LTTNG_ERR_UND;
- goto end;
+ break;
}
- if (nb_chan > 0) {
- const size_t channel_size = sizeof(struct lttng_channel) +
- sizeof(struct lttng_channel_extended);
- struct lttng_channel_extended *channel_exts;
-
- payload_size = nb_chan * channel_size;
- *channels = (lttng_channel *) zmalloc(payload_size);
- if (*channels == NULL) {
- ret = -LTTNG_ERR_FATAL;
- goto end;
- }
-
- channel_exts = (lttng_channel_extended *)
- (((char *) *channels) + (nb_chan * sizeof(struct lttng_channel)));
- ret = list_lttng_channels(domain, session, *channels, channel_exts);
- if (ret != LTTNG_OK) {
- free(*channels);
- *channels = NULL;
- goto end;
- }
- } else {
- *channels = NULL;
+ if (i > UINT32_MAX) {
+ ERR("Channel count would overflow the channel listing command's reply");
+ ret_code = LTTNG_ERR_OVERFLOW;
+ goto end;
}
- ret = payload_size;
+ /* Update command reply header. */
+ cmd_header.count = (uint32_t) i;
+ memcpy(payload->buffer.data + cmd_header_offset, &cmd_header,
+ sizeof(cmd_header));
+ ret_code = LTTNG_OK;
+
end:
- return ret;
+ return ret_code;
}
/*
* Command LTTNG_LIST_EVENTS processed by the client thread.
*/
-ssize_t cmd_list_events(enum lttng_domain_type domain,
- struct ltt_session *session, char *channel_name,
- struct lttng_payload *payload)
+enum lttng_error_code cmd_list_events(enum lttng_domain_type domain,
+ struct ltt_session *session,
+ char *channel_name,
+ struct lttng_payload *reply_payload)
{
- int ret = 0;
- ssize_t nb_events = 0;
- struct lttcomm_event_command_header cmd_header = {};
- const size_t cmd_header_offset = payload->buffer.size;
+ int buffer_resize_ret;
+ enum lttng_error_code ret_code = LTTNG_OK;
+ struct lttcomm_list_command_header reply_command_header = {};
+ size_t reply_command_header_offset;
+ unsigned int nb_events = 0;
- ret = lttng_dynamic_buffer_append(
- &payload->buffer, &cmd_header, sizeof(cmd_header));
- if (ret) {
- ret = LTTNG_ERR_NOMEM;
- goto error;
+ assert(reply_payload);
+
+ /* Reserve space for command reply header. */
+ reply_command_header_offset = reply_payload->buffer.size;
+ buffer_resize_ret = lttng_dynamic_buffer_set_size(&reply_payload->buffer,
+ reply_command_header_offset +
+ sizeof(struct lttcomm_list_command_header));
+ if (buffer_resize_ret) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto end;
}
switch (domain) {
case LTTNG_DOMAIN_KERNEL:
if (session->kernel_session != NULL) {
- nb_events = list_lttng_kernel_events(channel_name,
- session->kernel_session, payload);
+ ret_code = list_lttng_kernel_events(channel_name,
+ session->kernel_session, reply_payload, &nb_events);
}
+
break;
case LTTNG_DOMAIN_UST:
{
if (session->ust_session != NULL) {
- nb_events = list_lttng_ust_global_events(channel_name,
+ ret_code = list_lttng_ust_global_events(channel_name,
&session->ust_session->domain_global,
- payload);
+ reply_payload, &nb_events);
}
+
break;
}
case LTTNG_DOMAIN_LOG4J:
cds_lfht_for_each_entry(session->ust_session->agents->ht,
&iter.iter, agt, node.node) {
if (agt->domain == domain) {
- nb_events = list_lttng_agent_events(
- agt, payload);
+ ret_code = list_lttng_agent_events(
+ agt, reply_payload, &nb_events);
break;
}
}
+
rcu_read_unlock();
}
break;
default:
- ret = LTTNG_ERR_UND;
- goto error;
+ ret_code = LTTNG_ERR_UND;
+ break;
}
- ((struct lttcomm_event_command_header *) (payload->buffer.data +
- cmd_header_offset))->nb_events = (uint32_t) nb_events;
+ if (nb_events > UINT32_MAX) {
+ ret_code = LTTNG_ERR_OVERFLOW;
+ goto end;
+ }
- return nb_events;
+ /* Update command reply header. */
+ reply_command_header.count = (uint32_t) nb_events;
+ memcpy(reply_payload->buffer.data + reply_command_header_offset, &reply_command_header,
+ sizeof(reply_command_header));
-error:
- /* Return negative value to differentiate return code */
- return -ret;
+end:
+ return ret_code;
}
/*
goto end;
}
- list = (lttng_snapshot_output *) zmalloc(session->snapshot.nb_output * sizeof(*list));
+ list = calloc<lttng_snapshot_output>(session->snapshot.nb_output);
if (!list) {
ret = -LTTNG_ERR_NOMEM;
goto end;
struct ust_registry_event *event;
struct lttng_ht_iter iter_event;
+ chan->metadata_dumped = 0;
+
ret = ust_metadata_channel_statedump(registry, chan);
if (ret) {
pthread_mutex_unlock(®istry->lock);
"(err = %d)", ret);
goto end;
}
- cds_lfht_for_each_entry(chan->ht->ht, &iter_event.iter,
- event, node.node) {
+ cds_lfht_for_each_entry(chan->events->ht, &iter_event.iter,
+ event, node.node) {
+ event->metadata_dumped = 0;
ret = ust_metadata_event_statedump(registry,
chan, event);
if (ret) {
cds_lfht_for_each_entry(output->socks->ht, &iter.iter,
socket, node.node) {
pthread_mutex_lock(socket->lock);
- status = send_consumer_relayd_sockets(LTTNG_DOMAIN_NONE, session->id,
+ status = send_consumer_relayd_sockets(session->id,
output, socket,
session->name, session->hostname,
base_path,
struct ltt_kernel_session *ksess,
const struct consumer_output *output,
const struct ltt_session *session,
- int wait, uint64_t nb_packets_per_stream)
+ uint64_t nb_packets_per_stream)
{
enum lttng_error_code status;
LTTNG_ASSERT(session);
status = kernel_snapshot_record(
- ksess, output, wait, nb_packets_per_stream);
+ ksess, output, nb_packets_per_stream);
return status;
}
static enum lttng_error_code record_ust_snapshot(struct ltt_ust_session *usess,
const struct consumer_output *output,
const struct ltt_session *session,
- int wait, uint64_t nb_packets_per_stream)
+ uint64_t nb_packets_per_stream)
{
enum lttng_error_code status;
LTTNG_ASSERT(session);
status = ust_app_snapshot_record(
- usess, output, wait, nb_packets_per_stream);
+ usess, output, nb_packets_per_stream);
return status;
}
static
enum lttng_error_code snapshot_record(struct ltt_session *session,
- const struct snapshot_output *snapshot_output, int wait)
+ const struct snapshot_output *snapshot_output)
{
int64_t nb_packets_per_stream;
char snapshot_chunk_name[LTTNG_NAME_MAX];
if (session->kernel_session) {
ret_code = record_kernel_snapshot(session->kernel_session,
snapshot_kernel_consumer_output, session,
- wait, nb_packets_per_stream);
+ nb_packets_per_stream);
if (ret_code != LTTNG_OK) {
goto error_close_trace_chunk;
}
if (session->ust_session) {
ret_code = record_ust_snapshot(session->ust_session,
snapshot_ust_consumer_output, session,
- wait, nb_packets_per_stream);
+ nb_packets_per_stream);
if (ret_code != LTTNG_OK) {
goto error_close_trace_chunk;
}
* Return LTTNG_OK on success or else a LTTNG_ERR code.
*/
int cmd_snapshot_record(struct ltt_session *session,
- const struct lttng_snapshot_output *output, int wait)
+ const struct lttng_snapshot_output *output,
+ int wait __attribute__((unused)))
{
enum lttng_error_code cmd_ret = LTTNG_OK;
int ret;
/* Use the global datetime */
memcpy(tmp_output->datetime, datetime, sizeof(datetime));
- cmd_ret = snapshot_record(session, tmp_output, wait);
+ cmd_ret = snapshot_record(session, tmp_output);
if (cmd_ret != LTTNG_OK) {
goto error;
}
}
}
- cmd_ret = snapshot_record(session, &output_copy, wait);
+ cmd_ret = snapshot_record(session, &output_copy);
if (cmd_ret != LTTNG_OK) {
rcu_read_unlock();
goto error;
projects / lttng-tools.git / blobdiff