Merge branch 'barch/windows_no_popups' into 'main'

Prevent gtest tests from popping up dialog boxes

See merge request GNOME/glib!2400

glib/gtestutils.c

@@ -35,6 +35,7 @@
 #include <sys/resource.h>
 #endif
 #ifdef G_OS_WIN32
+#include <crtdbg.h>
 #include <io.h>
 #include <windows.h>
 #endif
@@ -1597,6 +1598,25 @@ void
   mutable_test_config_vars.test_undefined = FALSE;
 #endif
 
+#ifdef G_OS_WIN32
+  // don't open a window for errors (like the "abort() was called one")
+  _CrtSetReportMode (_CRT_ERROR, _CRTDBG_MODE_FILE);
+  _CrtSetReportFile (_CRT_ERROR, _CRTDBG_FILE_STDERR);
+  // while gtest tests tend to use g_assert and friends
+  // if they do use the C standard assert macro we want to
+  // output a message to stderr, not open a popup window
+  _CrtSetReportMode (_CRT_ASSERT, _CRTDBG_MODE_FILE);
+  _CrtSetReportFile (_CRT_ASSERT, _CRTDBG_FILE_STDERR);
+  // in release mode abort() will pop up a windows error
+  // reporting dialog, let's prevent that. Only msvcrxx and
+  // the UCRT have this function, but there's no great way to
+  // detect msvcrxx (that I know of) so only call this when using
+  // the UCRT
+#ifdef _UCRT
+  _set_abort_behavior (0, _CALL_REPORTFAULT);
+#endif
+#endif
+
   va_start (args, argv);
   while ((option = va_arg (args, char *)))
     {

glib/gutils.c

@@ -3160,8 +3160,13 @@ g_check_setuid (void)
 void
 g_abort (void)
 {
-  /* One call to break the debugger */
-  DebugBreak ();
+  /* One call to break the debugger
+   * We check if a debugger is actually attached to
+   * avoid a windows error reporting popup window
+   * when run in a test harness / on CI
+   */
+  if (IsDebuggerPresent ())
+    DebugBreak ();
   /* One call in case CRT changes its abort() behaviour */
   abort ();
   /* And one call to bind them all and terminate the program for sure */