--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/test/test-stdio-over-pipes.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,299 @@
+/* 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 <stdlib.h>
+#include <string.h>
+
+
+static char exepath[1024];
+static size_t exepath_size = 1024;
+static char* args[3];
+static uv_process_options_t options;
+static int close_cb_called;
+static int exit_cb_called;
+static int on_read_cb_called;
+static int after_write_cb_called;
+static uv_pipe_t in;
+static uv_pipe_t out;
+static uv_loop_t* loop;
+#define OUTPUT_SIZE 1024
+static char output[OUTPUT_SIZE];
+static int output_used;
+
+
+static void close_cb(uv_handle_t* handle) {
+  close_cb_called++;
+}
+
+
+static void exit_cb(uv_process_t* process,
+                    int64_t exit_status,
+                    int term_signal) {
+  printf("exit_cb\n");
+  exit_cb_called++;
+  ASSERT_OK(exit_status);
+  ASSERT_OK(term_signal);
+  uv_close((uv_handle_t*)process, close_cb);
+  uv_close((uv_handle_t*)&in, close_cb);
+  uv_close((uv_handle_t*)&out, close_cb);
+}
+
+
+static void init_process_options(char* test, uv_exit_cb exit_cb) {
+  int r = uv_exepath(exepath, &exepath_size);
+  ASSERT_OK(r);
+  exepath[exepath_size] = '\0';
+  args[0] = exepath;
+  args[1] = test;
+  args[2] = NULL;
+  options.file = exepath;
+  options.args = args;
+  options.exit_cb = exit_cb;
+}
+
+
+static void on_alloc(uv_handle_t* handle,
+                     size_t suggested_size,
+                     uv_buf_t* buf) {
+  buf->base = output + output_used;
+  buf->len = OUTPUT_SIZE - output_used;
+}
+
+
+static void after_write(uv_write_t* req, int status) {
+  if (status) {
+    fprintf(stderr, "uv_write error: %s\n", uv_strerror(status));
+    ASSERT(0);
+  }
+
+  /* Free the read/write buffer and the request */
+  free(req);
+
+  after_write_cb_called++;
+}
+
+
+static void on_read(uv_stream_t* pipe, ssize_t nread, const uv_buf_t* rdbuf) {
+  uv_write_t* req;
+  uv_buf_t wrbuf;
+  int r;
+
+  ASSERT(nread > 0 || nread == UV_EOF);
+
+  if (nread > 0) {
+    output_used += nread;
+    if (output_used % 12 == 0) {
+      ASSERT_OK(memcmp("hello world\n", output, 12));
+      wrbuf = uv_buf_init(output, 12);
+      req = malloc(sizeof(*req));
+      r = uv_write(req, (uv_stream_t*) &in, &wrbuf, 1, after_write);
+      ASSERT_OK(r);
+    }
+  }
+
+  on_read_cb_called++;
+}
+
+
+static void test_stdio_over_pipes(int overlapped) {
+  int r;
+  uv_process_t process;
+  uv_stdio_container_t stdio[3];
+
+  loop = uv_default_loop();
+
+  init_process_options("stdio_over_pipes_helper", exit_cb);
+
+  uv_pipe_init(loop, &out, 0);
+  uv_pipe_init(loop, &in, 0);
+
+  options.stdio = stdio;
+  options.stdio[0].flags = UV_CREATE_PIPE | UV_READABLE_PIPE |
+      (overlapped ?  UV_OVERLAPPED_PIPE : 0);
+  options.stdio[0].data.stream = (uv_stream_t*) &in;
+  options.stdio[1].flags = UV_CREATE_PIPE | UV_WRITABLE_PIPE |
+      (overlapped ? UV_OVERLAPPED_PIPE : 0);
+  options.stdio[1].data.stream = (uv_stream_t*) &out;
+  options.stdio[2].flags = UV_INHERIT_FD;
+  options.stdio[2].data.fd = 2;
+  options.stdio_count = 3;
+
+  r = uv_spawn(loop, &process, &options);
+  ASSERT_OK(r);
+
+  r = uv_read_start((uv_stream_t*) &out, on_alloc, on_read);
+  ASSERT_OK(r);
+
+  r = uv_run(loop, UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_GT(on_read_cb_called, 1);
+  ASSERT_EQ(2, after_write_cb_called);
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(3, close_cb_called);
+  ASSERT_OK(memcmp("hello world\nhello world\n", output, 24));
+  ASSERT_EQ(24, output_used);
+
+  MAKE_VALGRIND_HAPPY(loop);
+}
+
+TEST_IMPL(stdio_over_pipes) {
+  test_stdio_over_pipes(0);
+  return 0;
+}
+
+TEST_IMPL(stdio_emulate_iocp) {
+  test_stdio_over_pipes(1);
+  return 0;
+}
+
+
+/* Everything here runs in a child process. */
+
+static int on_pipe_read_called;
+static int after_write_called;
+static uv_pipe_t stdin_pipe1;
+static uv_pipe_t stdout_pipe1;
+static uv_pipe_t stdin_pipe2;
+static uv_pipe_t stdout_pipe2;
+
+static void on_pipe_read(uv_stream_t* pipe, ssize_t nread, const uv_buf_t* buf) {
+  ASSERT_GT(nread, 0);
+  ASSERT_OK(memcmp("hello world\n", buf->base, nread));
+  on_pipe_read_called++;
+
+  free(buf->base);
+
+  uv_read_stop(pipe);
+}
+
+
+static void after_pipe_write(uv_write_t* req, int status) {
+  ASSERT_OK(status);
+  after_write_called++;
+}
+
+
+static void on_read_alloc(uv_handle_t* handle,
+                          size_t suggested_size,
+                          uv_buf_t* buf) {
+  buf->base = malloc(suggested_size);
+  buf->len = suggested_size;
+}
+
+
+int stdio_over_pipes_helper(void) {
+  /* Write several buffers to test that the write order is preserved. */
+  char* buffers[] = {
+    "he",
+    "ll",
+    "o ",
+    "wo",
+    "rl",
+    "d",
+    "\n"
+  };
+
+  uv_write_t write_req[ARRAY_SIZE(buffers)];
+  uv_buf_t buf[ARRAY_SIZE(buffers)];
+  unsigned int i;
+  int j;
+  int r;
+  uv_loop_t* loop = uv_default_loop();
+
+  ASSERT_EQ(UV_NAMED_PIPE, uv_guess_handle(0));
+  ASSERT_EQ(UV_NAMED_PIPE, uv_guess_handle(1));
+
+  r = uv_pipe_init(loop, &stdin_pipe1, 0);
+  ASSERT_OK(r);
+  r = uv_pipe_init(loop, &stdout_pipe1, 0);
+  ASSERT_OK(r);
+  r = uv_pipe_init(loop, &stdin_pipe2, 0);
+  ASSERT_OK(r);
+  r = uv_pipe_init(loop, &stdout_pipe2, 0);
+  ASSERT_OK(r);
+
+  uv_pipe_open(&stdin_pipe1, 0);
+  uv_pipe_open(&stdout_pipe1, 1);
+  uv_pipe_open(&stdin_pipe2, 0);
+  uv_pipe_open(&stdout_pipe2, 1);
+
+  for (j = 0; j < 2; j++) {
+    /* Unref both stdio handles to make sure that all writes complete. */
+    uv_unref((uv_handle_t*) &stdin_pipe1);
+    uv_unref((uv_handle_t*) &stdout_pipe1);
+    uv_unref((uv_handle_t*) &stdin_pipe2);
+    uv_unref((uv_handle_t*) &stdout_pipe2);
+
+    for (i = 0; i < ARRAY_SIZE(buffers); i++) {
+      buf[i] = uv_buf_init((char*) buffers[i], strlen(buffers[i]));
+    }
+
+    for (i = 0; i < ARRAY_SIZE(buffers); i++) {
+      r = uv_write(&write_req[i],
+                   (uv_stream_t*) (j == 0 ? &stdout_pipe1 : &stdout_pipe2),
+                   &buf[i],
+                   1,
+                   after_pipe_write);
+      ASSERT_OK(r);
+    }
+
+    notify_parent_process();
+    uv_run(loop, UV_RUN_DEFAULT);
+
+    ASSERT_EQ(after_write_called, 7 * (j + 1));
+    ASSERT_EQ(on_pipe_read_called, j);
+    ASSERT_OK(close_cb_called);
+
+    uv_ref((uv_handle_t*) &stdout_pipe1);
+    uv_ref((uv_handle_t*) &stdin_pipe1);
+    uv_ref((uv_handle_t*) &stdout_pipe2);
+    uv_ref((uv_handle_t*) &stdin_pipe2);
+
+    r = uv_read_start((uv_stream_t*) (j == 0 ? &stdin_pipe1 : &stdin_pipe2),
+                      on_read_alloc,
+                      on_pipe_read);
+    ASSERT_OK(r);
+
+    uv_run(loop, UV_RUN_DEFAULT);
+
+    ASSERT_EQ(after_write_called, 7 * (j + 1));
+    ASSERT_EQ(on_pipe_read_called, j + 1);
+    ASSERT_OK(close_cb_called);
+  }
+
+  uv_close((uv_handle_t*)&stdin_pipe1, close_cb);
+  uv_close((uv_handle_t*)&stdout_pipe1, close_cb);
+  uv_close((uv_handle_t*)&stdin_pipe2, close_cb);
+  uv_close((uv_handle_t*)&stdout_pipe2, close_cb);
+
+  uv_run(loop, UV_RUN_DEFAULT);
+
+  ASSERT_EQ(14, after_write_called);
+  ASSERT_EQ(2, on_pipe_read_called);
+  ASSERT_EQ(4, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(loop);
+  return 0;
+}