trace: implement registration payload

[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 e82bb9e..da269de 100644 (file)
--- a/lib/librte_eal/common/eal_common_trace.c
+++ b/lib/librte_eal/common/eal_common_trace.c
@@ -378,6 +378,25 @@ trace_mem_per_thread_free(void)
        rte_spinlock_unlock(&trace->lock);
 }
 
+void
+__rte_trace_point_emit_field(size_t sz, const char *in, const char *datatype)
+{
+       char *field = RTE_PER_LCORE(ctf_field);
+       int count = RTE_PER_LCORE(ctf_count);
+       size_t size;
+       int rc;
+
+       size = RTE_MAX(0, TRACE_CTF_FIELD_SIZE - 1 - count);
+       RTE_PER_LCORE(trace_point_sz) += sz;
+       rc = snprintf(RTE_PTR_ADD(field, count), size, "%s %s;", datatype, in);
+       if (rc <= 0 || (size_t)rc >= size) {
+               RTE_PER_LCORE(trace_point_sz) = 0;
+               trace_crit("CTF field is too long");
+               return;
+       }
+       RTE_PER_LCORE(ctf_count) += rc;
+}
+
 int
 __rte_trace_point_register(rte_trace_point_t *handle, const char *name,
                void (*register_fn)(void))