--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/test/blackhole-server.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,122 @@
+/* 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"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef struct {
+  uv_tcp_t handle;
+  uv_shutdown_t shutdown_req;
+} conn_rec;
+
+static uv_tcp_t tcp_server;
+
+static void connection_cb(uv_stream_t* stream, int status);
+static void alloc_cb(uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf);
+static void read_cb(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf);
+static void shutdown_cb(uv_shutdown_t* req, int status);
+static void close_cb(uv_handle_t* handle);
+
+
+static void connection_cb(uv_stream_t* stream, int status) {
+  conn_rec* conn;
+  int r;
+
+  ASSERT_OK(status);
+  ASSERT_PTR_EQ(stream, (uv_stream_t*)&tcp_server);
+
+  conn = malloc(sizeof *conn);
+  ASSERT_NOT_NULL(conn);
+
+  r = uv_tcp_init(stream->loop, &conn->handle);
+  ASSERT_OK(r);
+
+  r = uv_accept(stream, (uv_stream_t*)&conn->handle);
+  ASSERT_OK(r);
+
+  r = uv_read_start((uv_stream_t*)&conn->handle, alloc_cb, read_cb);
+  ASSERT_OK(r);
+}
+
+
+static void alloc_cb(uv_handle_t* handle,
+                     size_t suggested_size,
+                     uv_buf_t* buf) {
+  static char slab[65536];
+  buf->base = slab;
+  buf->len = sizeof(slab);
+}
+
+
+static void read_cb(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf) {
+  conn_rec* conn;
+  int r;
+
+  if (nread >= 0)
+    return;
+
+  ASSERT_EQ(nread, UV_EOF);
+
+  conn = container_of(stream, conn_rec, handle);
+
+  r = uv_shutdown(&conn->shutdown_req, stream, shutdown_cb);
+  ASSERT_OK(r);
+}
+
+
+static void shutdown_cb(uv_shutdown_t* req, int status) {
+  conn_rec* conn = container_of(req, conn_rec, shutdown_req);
+  uv_close((uv_handle_t*)&conn->handle, close_cb);
+}
+
+
+static void close_cb(uv_handle_t* handle) {
+  conn_rec* conn = container_of(handle, conn_rec, handle);
+  free(conn);
+}
+
+
+HELPER_IMPL(tcp4_blackhole_server) {
+  struct sockaddr_in addr;
+  uv_loop_t* loop;
+  int r;
+
+  loop = uv_default_loop();
+  ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
+
+  r = uv_tcp_init(loop, &tcp_server);
+  ASSERT_OK(r);
+
+  r = uv_tcp_bind(&tcp_server, (const struct sockaddr*) &addr, 0);
+  ASSERT_OK(r);
+
+  r = uv_listen((uv_stream_t*)&tcp_server, 128, connection_cb);
+  ASSERT_OK(r);
+
+  notify_parent_process();
+  r = uv_run(loop, UV_RUN_DEFAULT);
+  ASSERT(0 && "Blackhole server dropped out of event loop.");
+
+  return 0;
+}