--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/test/test-loop-stop.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,83 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "uv.h"
+#include "task.h"
+
+static uv_prepare_t prepare_handle;
+static uv_timer_t timer_handle;
+static int prepare_called = 0;
+static int timer_called = 0;
+static int num_ticks = 10;
+
+
+static void prepare_cb(uv_prepare_t* handle) {
+  ASSERT_PTR_EQ(handle, &prepare_handle);
+  prepare_called++;
+  if (prepare_called == num_ticks)
+    uv_prepare_stop(handle);
+}
+
+
+static void timer_cb(uv_timer_t* handle) {
+  ASSERT_PTR_EQ(handle, &timer_handle);
+  timer_called++;
+  if (timer_called == 1)
+    uv_stop(uv_default_loop());
+  else if (timer_called == num_ticks)
+    uv_timer_stop(handle);
+}
+
+
+TEST_IMPL(loop_stop) {
+  int r;
+  uv_prepare_init(uv_default_loop(), &prepare_handle);
+  uv_prepare_start(&prepare_handle, prepare_cb);
+  uv_timer_init(uv_default_loop(), &timer_handle);
+  uv_timer_start(&timer_handle, timer_cb, 100, 100);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT(r);
+  ASSERT_EQ(1, timer_called);
+
+  r = uv_run(uv_default_loop(), UV_RUN_NOWAIT);
+  ASSERT(r);
+  ASSERT_GT(prepare_called, 1);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+  ASSERT_EQ(10, timer_called);
+  ASSERT_EQ(10, prepare_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(loop_stop_before_run) {
+  ASSERT_OK(uv_timer_init(uv_default_loop(), &timer_handle));
+  ASSERT_OK(uv_timer_start(&timer_handle, (uv_timer_cb) abort, 0, 0));
+  uv_stop(uv_default_loop());
+  ASSERT_NE(0, uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}