--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/test/test-process-title.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,135 @@
+/* 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 <string.h>
+
+
+static void set_title(const char* title) {
+  char buffer[512];
+  int err;
+
+  err = uv_get_process_title(buffer, sizeof(buffer));
+  ASSERT_OK(err);
+
+  err = uv_set_process_title(title);
+  ASSERT_OK(err);
+
+  err = uv_get_process_title(buffer, sizeof(buffer));
+  ASSERT_OK(err);
+
+  ASSERT_OK(strcmp(buffer, title));
+}
+
+
+static void uv_get_process_title_edge_cases(void) {
+  char buffer[512];
+  int r;
+
+  /* Test a NULL buffer */
+  r = uv_get_process_title(NULL, 100);
+  ASSERT_EQ(r, UV_EINVAL);
+
+  /* Test size of zero */
+  r = uv_get_process_title(buffer, 0);
+  ASSERT_EQ(r, UV_EINVAL);
+
+  /* Test for insufficient buffer size */
+  r = uv_get_process_title(buffer, 1);
+  ASSERT_EQ(r, UV_ENOBUFS);
+}
+
+
+TEST_IMPL(process_title) {
+#if defined(__sun) || defined(__CYGWIN__) || defined(__MSYS__) || \
+    defined(__PASE__)
+  RETURN_SKIP("uv_(get|set)_process_title is not implemented.");
+#endif
+
+  /* Check for format string vulnerabilities. */
+  set_title("%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s");
+  set_title("new title");
+
+  /* Check uv_get_process_title() edge cases */
+  uv_get_process_title_edge_cases();
+
+  return 0;
+}
+
+
+static void exit_cb(uv_process_t* process, int64_t status, int signo) {
+  ASSERT_OK(status);
+  ASSERT_OK(signo);
+  uv_close((uv_handle_t*) process, NULL);
+}
+
+
+TEST_IMPL(process_title_big_argv) {
+  uv_process_options_t options;
+  uv_process_t process;
+  size_t exepath_size;
+  char exepath[1024];
+  char jumbo[512];
+  char* args[5];
+
+#ifdef _WIN32
+  /* Remove once https://github.com/libuv/libuv/issues/2667 is fixed. */
+  uv_set_process_title("run-tests");
+#endif
+
+  exepath_size = sizeof(exepath) - 1;
+  ASSERT_OK(uv_exepath(exepath, &exepath_size));
+  exepath[exepath_size] = '\0';
+
+  memset(jumbo, 'x', sizeof(jumbo) - 1);
+  jumbo[sizeof(jumbo) - 1] = '\0';
+
+  /* Note: need to pass three arguments, not two, otherwise
+   * run-tests.c thinks it's the name of a test to run.
+   */
+  args[0] = exepath;
+  args[1] = "process_title_big_argv_helper";
+  args[2] = jumbo;
+  args[3] = jumbo;
+  args[4] = NULL;
+
+  memset(&options, 0, sizeof(options));
+  options.file = exepath;
+  options.args = args;
+  options.exit_cb = exit_cb;
+
+  ASSERT_OK(uv_spawn(uv_default_loop(), &process, &options));
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+/* Called by process_title_big_argv_helper. */
+void process_title_big_argv(void) {
+  char buf[256] = "fail";
+
+  /* Return value deliberately ignored. */
+  uv_get_process_title(buf, sizeof(buf));
+  ASSERT_NE(0, strcmp(buf, "fail"));
+}