util: Introduce "subprogram_name" to identify subprocesses and threads.

[openvswitch] / lib / vlog.c

diff --git a/lib/vlog.c b/lib/vlog.c
index d26e61391e58f7fc3b52171f87faf1e0abfc9794..128ed45dcf5b46b6bb6ba6aa650ea5df3f556065 100644 (file)
--- a/lib/vlog.c
+++ b/lib/vlog.c
@@ -653,6 +653,14 @@ format_log_message(const struct vlog_module *module, enum vlog_level level,
         case 'r':
             ds_put_format(s, "%lld", time_msec() - time_boot_msec());
             break;
+        case 't':
+            ds_put_cstr(s, subprogram_name[0] ? subprogram_name : "main");
+            break;
+        case 'T':
+            if (subprogram_name[0]) {
+                ds_put_format(s, "(%s)", subprogram_name);
+            }
+            break;
         default:
             ds_put_char(s, p[-1]);
             break;