#include "tracepoint-internal.h"
#include "lttng-tracer.h"
#include "lttng-tracer-core.h"
+#include "lttng-ust-baddr.h"
#include "wait.h"
#include "../libringbuffer/shm.h"
#include "jhash.h"
/*
- * The sessions mutex is the centralized mutex across UST tracing
- * control and probe registration. All operations within this file are
- * called by the communication thread, under ust_lock protection.
+ * All operations within this file are called by the communication
+ * thread, under ust_lock protection.
*/
-static pthread_mutex_t sessions_mutex = PTHREAD_MUTEX_INITIALIZER;
-void ust_lock(void)
-{
- pthread_mutex_lock(&sessions_mutex);
-}
+static CDS_LIST_HEAD(sessions);
-void ust_unlock(void)
+struct cds_list_head *_lttng_get_sessions(void)
{
- pthread_mutex_unlock(&sessions_mutex);
+ return &sessions;
}
-static CDS_LIST_HEAD(sessions);
-
static void _lttng_event_destroy(struct lttng_event *event);
static
enum lttng_ust_loglevel_type req_type,
int req_loglevel)
{
- if (req_type == LTTNG_UST_LOGLEVEL_ALL)
- return 1;
if (!has_loglevel)
loglevel = TRACE_DEFAULT;
switch (req_type) {
case LTTNG_UST_LOGLEVEL_RANGE:
- if (loglevel <= req_loglevel || req_loglevel == -1)
+ if (loglevel <= req_loglevel
+ || (req_loglevel == -1 && loglevel <= TRACE_DEBUG))
return 1;
else
return 0;
case LTTNG_UST_LOGLEVEL_SINGLE:
- if (loglevel == req_loglevel || req_loglevel == -1)
+ if (loglevel == req_loglevel
+ || (req_loglevel == -1 && loglevel <= TRACE_DEBUG))
return 1;
else
return 0;
case LTTNG_UST_LOGLEVEL_ALL:
default:
- return 1;
+ if (loglevel <= TRACE_DEBUG)
+ return 1;
+ else
+ return 0;
}
}
/* Set transient enabler state to "enabled" */
session->tstate = 1;
- /* We need to sync enablers with session before activation. */
- lttng_session_sync_enablers(session);
/*
* Snapshot the number of events per channel to know the type of header
}
}
+ /* We need to sync enablers with session before activation. */
+ lttng_session_sync_enablers(session);
+
/* Set atomically the state to "active" */
CMM_ACCESS_ONCE(session->active) = 1;
CMM_ACCESS_ONCE(session->been_active) = 1;
- lttng_ust_sockinfo_session_enabled(session->owner, session);
+ session->statedump_pending = 1;
+ lttng_ust_sockinfo_session_enabled(session->owner);
end:
return ret;
}
return 0;
}
+/*
+ * For each session of the owner thread, execute pending statedump.
+ * Only dump state for the sessions owned by the caller thread, because
+ * we don't keep ust_lock across the entire iteration.
+ */
+void lttng_handle_pending_statedump(void *owner)
+{
+ struct lttng_session *session;
+
+ /* Execute state dump */
+ lttng_ust_baddr_statedump(owner);
+
+ /* Clear pending state dump */
+ if (ust_lock()) {
+ goto end;
+ }
+ cds_list_for_each_entry(session, &sessions, node) {
+ if (session->owner != owner)
+ continue;
+ if (!session->statedump_pending)
+ continue;
+ session->statedump_pending = 0;
+ }
+end:
+ ust_unlock();
+ return;
+}
+
/*
* Only used internally at session destruction.
*/
sizeof(enabler->event_param));
enabler->chan = chan;
/* ctx left NULL */
- enabler->enabled = 1;
+ /*
+ * The "disable" event create comm field has been added to fix a
+ * race between event creation (of a started trace) and enabling
+ * filtering. New session daemon always set the "disable" field
+ * to 1, and are aware that they need to explicitly enable the
+ * event. Older session daemon (within same ABI) leave it at 0,
+ * and therefore we need to enable it here, keeping the original
+ * racy behavior.
+ */
+ enabler->enabled = !event_param->disabled;
cds_list_add(&enabler->node, &enabler->chan->session->enablers_head);
lttng_session_lazy_sync_enablers(enabler->chan->session);
return enabler;
switch (context_param->ctx) {
case LTTNG_UST_CONTEXT_PTHREAD_ID:
return lttng_add_pthread_id_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER:
+ {
+ struct lttng_ust_perf_counter_ctx *perf_ctx_param;
+
+ perf_ctx_param = &context_param->u.perf_counter;
+ return lttng_add_perf_counter_to_ctx(
+ perf_ctx_param->type,
+ perf_ctx_param->config,
+ perf_ctx_param->name,
+ ctx);
+ }
case LTTNG_UST_CONTEXT_VTID:
return lttng_add_vtid_to_ctx(ctx);
case LTTNG_UST_CONTEXT_VPID: