eal: introduce API for getting thread name

Introduce rte_thread_getname() API to get the thread name
and implement it for Linux and FreeBSD.

FreeBSD does not support getting the thread name.

One of the consumers of this API will be the trace subsystem where
it used as an informative purpose.

Signed-off-by: Jerin Jacob <jerinj@marvell.com>
Acked-by: David Marchand <david.marchand@redhat.com>

diff --git a/lib/librte_eal/freebsd/eal_thread.c b/lib/librte_eal/freebsd/eal_thread.c
index f21eddd93c9b6718c1b9d89873d227a1304a86ba..d802c1d2e7e9867b7a372531376b4f669f48a44a 100644 (file)
--- a/lib/librte_eal/freebsd/eal_thread.c
+++ b/lib/librte_eal/freebsd/eal_thread.c
@@ -175,3 +175,12 @@ int rte_thread_setname(pthread_t id, const char *name)
        pthread_set_name_np(id, name);
        return 0;
 }
+
+int rte_thread_getname(pthread_t id, char *name, size_t len)
+{
+       RTE_SET_USED(id);
+       RTE_SET_USED(name);
+       RTE_SET_USED(len);
+
+       return -ENOTSUP;
+}

diff --git a/lib/librte_eal/include/rte_lcore.h b/lib/librte_eal/include/rte_lcore.h
index 476b8ef3a7396d24abb9f87cf5f650ce23f65bde..339046bc8691a2f5add9366bf5bc1c063d4d7ae2 100644 (file)
--- a/lib/librte_eal/include/rte_lcore.h
+++ b/lib/librte_eal/include/rte_lcore.h
@@ -240,6 +240,23 @@ void rte_thread_get_affinity(rte_cpuset_t *cpusetp);
  */
 int rte_thread_setname(pthread_t id, const char *name);
 
+/**
+ * Get thread name.
+ *
+ * @note It fails with glibc < 2.12.
+ *
+ * @param id
+ *   Thread id.
+ * @param name
+ *   Thread name to set.
+ * @param len
+ *   Thread name buffer length.
+ * @return
+ *   On success, return 0; otherwise return a negative value.
+ */
+__rte_experimental
+int rte_thread_getname(pthread_t id, char *name, size_t len);
+
 /**
  * Create a control thread.
  *

diff --git a/lib/librte_eal/linux/eal_thread.c b/lib/librte_eal/linux/eal_thread.c
index 2fa5806b882c018a8573172e6669c7f339bec5a9..61fb2ed452c0b81a749bf6aa8622e03a03b33e89 100644 (file)
--- a/lib/librte_eal/linux/eal_thread.c
+++ b/lib/librte_eal/linux/eal_thread.c
@@ -186,3 +186,18 @@ int rte_thread_setname(pthread_t id, const char *name)
        RTE_SET_USED(name);
        return -ret;
 }
+
+int rte_thread_getname(pthread_t id, char *name, size_t len)
+{
+       int ret = ENOSYS;
+#if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
+#if __GLIBC_PREREQ(2, 12)
+       ret = pthread_getname_np(id, name, len);
+#endif
+#endif
+       RTE_SET_USED(id);
+       RTE_SET_USED(name);
+       RTE_SET_USED(len);
+       return -ret;
+
+}

diff --git a/lib/librte_eal/rte_eal_version.map b/lib/librte_eal/rte_eal_version.map
index f9ede5b41c69815841392087ee286208f9d480f8..71098581f9db2b299fe078ecd4e1dfc9fcb2b2ff 100644 (file)
--- a/lib/librte_eal/rte_eal_version.map
+++ b/lib/librte_eal/rte_eal_version.map
@@ -338,4 +338,5 @@ EXPERIMENTAL {
 
        # added in 20.05
        rte_log_can_log;
+       rte_thread_getname;
 };