tests: fix spawn-multithreaded on win32

Add test-spawn-sleep helper program to sleep on Windows (child-test
removed in commit 241b9f41b, probably breaking the test)

(fwiw, Windows has a timeout command nowadays, but it conflicts with
msys2 timeout which has different usage)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>

glib/tests/meson.build

@@ -267,6 +267,16 @@ executable('test-spawn-echo', 'test-spawn-echo.c',
   install: installed_tests_enabled,
 )
 
+if host_machine.system() == 'windows'
+  # test-spawn-sleep helper binary required by the spawn tests above
+  executable('test-spawn-sleep', 'test-spawn-sleep.c',
+    c_args : test_cargs,
+    dependencies : test_deps,
+    install_dir: installed_tests_execdir,
+    install: installed_tests_enabled,
+  )
+endif
+
 executable('testing-helper', 'testing-helper.c',
   c_args : test_cargs,
   dependencies : test_deps,

glib/tests/spawn-multithreaded.c

@@ -31,6 +31,7 @@
 #include <sys/types.h>
 
 static char *echo_prog_path;
+static char *sleep_prog_path;
 
 #ifdef G_OS_UNIX
 #include <unistd.h>
@@ -43,10 +44,6 @@ static char *echo_prog_path;
 static GMainLoop *global_main_loop;
 static guint alive;
 
-#ifdef G_OS_WIN32
-static char *argv0;
-#endif
-
 static GPid
 get_a_child (gint ttl)
 {
@@ -61,9 +58,9 @@ get_a_child (gint ttl)
   si.cb = sizeof (&si);
   memset (&pi, 0, sizeof (pi));
 
-  cmdline = g_strdup_printf ("child-test -c%d", ttl);
+  cmdline = g_strdup_printf ("%s %d", sleep_prog_path, ttl);
 
-  if (!CreateProcess (argv0, cmdline, NULL, NULL,
+  if (!CreateProcess (NULL, cmdline, NULL, NULL,
                       FALSE, 0, NULL, NULL, &si, &pi))
     g_error ("CreateProcess failed: %s",
              g_win32_error_message (GetLastError ()));
@@ -384,9 +381,13 @@ main (int   argc,
 
   dirname = g_path_get_dirname (argv[0]);
   echo_prog_path = g_build_filename (dirname, "test-spawn-echo" EXEEXT, NULL);
+  sleep_prog_path = g_build_filename (dirname, "test-spawn-sleep" EXEEXT, NULL);
   g_free (dirname);
 
   g_assert (g_file_test (echo_prog_path, G_FILE_TEST_EXISTS));
+#ifdef G_OS_WIN32
+  g_assert (g_file_test (sleep_prog_path, G_FILE_TEST_EXISTS));
+#endif
 
   g_test_add_func ("/gthread/spawn-childs", test_spawn_childs);
   g_test_add_func ("/gthread/spawn-childs-threads", test_spawn_childs_threads);
@@ -396,6 +397,7 @@ main (int   argc,
   ret = g_test_run();
 
   g_free (echo_prog_path);
+  g_free (sleep_prog_path);
 
   return ret;
 }

glib/tests/test-spawn-sleep.c

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2022 Red Hat, Inc.
+ *
+ * This work is provided "as is"; redistribution and modification
+ * in whole or in part, in any medium, physical or electronic is
+ * permitted without restriction.
+ *
+ * This work is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * In no event shall the authors or contributors be liable for any
+ * direct, indirect, incidental, special, exemplary, or consequential
+ * damages (including, but not limited to, procurement of substitute
+ * goods or services; loss of use, data, or profits; or business
+ * interruption) however caused and on any theory of liability, whether
+ * in contract, strict liability, or tort (including negligence or
+ * otherwise) arising in any way out of the use of this software, even
+ * if advised of the possibility of such damage.
+ */
+#include "config.h"
+
+#include <stdlib.h>
+#include "glib.h"
+
+int
+main (int   argc,
+      char *argv[])
+{
+  g_usleep (atoi (argv[1]) * G_USEC_PER_SEC);
+  return 0;
+}