Label all iomgr objects
This allows a list of them to be dumped to isolate where memory leaks
are occuring.
diff --git a/test/core/end2end/fixtures/chttp2_socket_pair.c b/test/core/end2end/fixtures/chttp2_socket_pair.c
index e0221d0..48c121c 100644
--- a/test/core/end2end/fixtures/chttp2_socket_pair.c
+++ b/test/core/end2end/fixtures/chttp2_socket_pair.c
@@ -98,7 +98,7 @@
f.client_cq = grpc_completion_queue_create();
f.server_cq = grpc_completion_queue_create();
- *sfd = grpc_iomgr_create_endpoint_pair(65536);
+ *sfd = grpc_iomgr_create_endpoint_pair("fixture", 65536);
return f;
}