Class SuppressCrashReport

Lib/test/support/__init__.py:1886–1979

Try to prevent a crash report from popping up. On Windows, don't display the Windows Error Reporting dialog. On UNIX, disable the creation of coredump file.

class SuppressCrashReport:
    """Try to prevent a crash report from popping up.

    On Windows, don't display the Windows Error Reporting dialog.  On UNIX,
    disable the creation of coredump file.
    """
    old_value = None
    old_modes = None

    def __enter__(self):
        """On Windows, disable Windows Error Reporting dialogs using
        SetErrorMode() and CrtSetReportMode().

        On UNIX, try to save the previous core file size limit, then set
        soft limit to 0.
        """
        if sys.platform.startswith('win'):
            # see http://msdn.microsoft.com/en-us/library/windows/desktop/ms680621.aspx
            try:
                import msvcrt
            except ImportError:
                return

            self.old_value = msvcrt.GetErrorMode()

            msvcrt.SetErrorMode(self.old_value | msvcrt.SEM_NOGPFAULTERRORBOX)

            # bpo-23314: Suppress assert dialogs in debug builds.
            # CrtSetReportMode() is only available in debug build.
            if hasattr(msvcrt, 'CrtSetReportMode'):
                self.old_modes = {}
                for report_type in [msvcrt.CRT_WARN,
                                    msvcrt.CRT_ERROR,
                                    msvcrt.CRT_ASSERT]:
                    old_mode = msvcrt.CrtSetReportMode(report_type,
                            msvcrt.CRTDBG_MODE_FILE)
                    old_file = msvcrt.CrtSetReportFile(report_type,
                            msvcrt.CRTDBG_FILE_STDERR)
                    self.old_modes[report_type] = old_mode, old_file

        else:
            try:
                import resource
                self.resource = resource
            except ImportError:
                self.resource = None
            if self.resource is not None:
                try:
                    self.old_value = self.resource.getrlimit(self.resource.RLIMIT_CORE)
                    self.resource.setrlimit(self.resource.RLIMIT_CORE,
                                            (0, self.old_value[1]))
                except (ValueError, OSError):
                    pass

            if sys.platform == 'darwin':
                import subprocess
                # Check if the 'Crash Reporter' on OSX was configured
                # in 'Developer' mode and warn that it will get triggered