// Perform system library startup tasks. This is normally
// called just before invoking the program's "main" function.
public static void Startup()
{
Module mainModule;
Assembly assembly;
Type type;
FieldInfo field;
// Bail out if we've already done the startup code.
lock (typeof(Crt0))
{
if (startupDone)
{
return;
}
startupDone = true;
}
// Find the module that contains the "main" function.
mainModule = null;
try
{
assembly = Assembly.GetCallingAssembly();
type = assembly.GetType("<Module>");
if (type != null)
{
mainModule = type.Module;
}
}
catch (NotImplementedException)
{
// The runtime engine probably does not have support
// for reflection, so there's nothing we can do.
}
// Find standard C library's global module.
libcModule = null;
try
{
assembly = Assembly.Load("libc");
type = assembly.GetType("libc");
if (type != null)
{
libcModule = type.Module;
}
}
catch (OutOfMemoryException)
{
// Send out of memory conditions back up the stack.
throw;
}
catch (Exception)
{
// We weren't able to load "libc" for some reason.
}
// Set the global "__environ" variable within "libc".
if (libcModule != null)
{
field = libcModule.GetField("__environ");
if (field != null)
{
field.SetValue(null, (Object)environ);
}
}
// Initialize the stdin, stdout, and stderr file descriptors.
#if CONFIG_SMALL_CONSOLE
FileTable.SetFileDescriptor(0, Stream.Null);
FileTable.SetFileDescriptor(1, new ConsoleStream());
FileTable.SetFileDescriptor(2, new ConsoleStream());
#else
FileTable.SetFileDescriptor
(0, new FDStream(0, Console.OpenStandardInput()));
FileTable.SetFileDescriptor
(1, new FDStream(1, Console.OpenStandardOutput()));
FileTable.SetFileDescriptor
(2, new FDStream(2, Console.OpenStandardError()));
#endif
// Invoke the application's ".init" function, if present.
if (mainModule != null)
{
MethodInfo initMethod = mainModule.GetMethod(".init");
if (initMethod != null)
{
initMethod.Invoke(null, null);
}
}
// Locate the application's ".fini" function.
if (mainModule != null)
{
finiMethod = mainModule.GetMethod(".fini");
}
else
{
finiMethod = null;
}
}
