--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/test/test-loop-configure.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,38 @@
+/* Copyright (c) 2014, Ben Noordhuis <[email protected]>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "uv.h"
+#include "task.h"
+
+static void timer_cb(uv_timer_t* handle) {
+  uv_close((uv_handle_t*) handle, NULL);
+}
+
+
+TEST_IMPL(loop_configure) {
+  uv_timer_t timer_handle;
+  uv_loop_t loop;
+  ASSERT_OK(uv_loop_init(&loop));
+#ifdef _WIN32
+  ASSERT_EQ(UV_ENOSYS, uv_loop_configure(&loop, UV_LOOP_BLOCK_SIGNAL, 0));
+#else
+  ASSERT_OK(uv_loop_configure(&loop, UV_LOOP_BLOCK_SIGNAL, SIGPROF));
+#endif
+  ASSERT_OK(uv_timer_init(&loop, &timer_handle));
+  ASSERT_OK(uv_timer_start(&timer_handle, timer_cb, 10, 0));
+  ASSERT_OK(uv_run(&loop, UV_RUN_DEFAULT));
+  ASSERT_OK(uv_loop_close(&loop));
+  return 0;
+}