trace: create CTF TDSL metadata in memory

[dpdk.git] / lib / librte_eal / common / eal_common_trace.c

diff --git a/lib/librte_eal/common/eal_common_trace.c b/lib/librte_eal/common/eal_common_trace.c
index a765a24..923b1dc 100644 (file)
--- a/lib/librte_eal/common/eal_common_trace.c
+++ b/lib/librte_eal/common/eal_common_trace.c
@@ -22,6 +22,72 @@ static RTE_DEFINE_PER_LCORE(int, ctf_count);
 static struct trace_point_head tp_list = STAILQ_HEAD_INITIALIZER(tp_list);
 static struct trace trace;
 
+struct trace *
+trace_obj_get(void)
+{
+       return &trace;
+}
+
+struct trace_point_head *
+trace_list_head_get(void)
+{
+       return &tp_list;
+}
+
+int
+eal_trace_init(void)
+{
+       /* One of the trace point registration failed */
+       if (trace.register_errno) {
+               rte_errno = trace.register_errno;
+               goto fail;
+       }
+
+       if (!rte_trace_is_enabled())
+               return 0;
+
+       rte_spinlock_init(&trace.lock);
+
+       /* Is duplicate trace name registered */
+       if (trace_has_duplicate_entry())
+               goto fail;
+
+       /* Generate UUID ver 4 with total size of events and number of
+        * events
+        */
+       trace_uuid_generate();
+
+       /* Generate CTF TDSL metadata */
+       if (trace_metadata_create() < 0)
+               goto fail;
+
+       /* Create trace directory */
+       if (trace_mkdir())
+               goto free_meta;
+
+       /* Save current epoch timestamp for future use */
+       if (trace_epoch_time_save() < 0)
+               goto fail;
+
+       rte_trace_mode_set(trace.mode);
+
+       return 0;
+
+free_meta:
+       trace_metadata_destroy();
+fail:
+       trace_err("failed to initialize trace [%s]", rte_strerror(rte_errno));
+       return -rte_errno;
+}
+
+void
+eal_trace_fini(void)
+{
+       if (!rte_trace_is_enabled())
+               return;
+       trace_metadata_destroy();
+}
+
 bool
 rte_trace_is_enabled(void)
 {