old-autovect-branch/libjava/gnu/java/lang/natMainThread.cc

   1 // natMainThread.cc - Implementation of MainThread native methods.
   2
   3 /* Copyright (C) 1998, 1999, 2000, 2001, 2003  Free Software Foundation
   4
   5    This file is part of libgcj.
   6
   7 This software is copyrighted work licensed under the terms of the
   8 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   9 details.  */
  10
  11 #include <config.h>
  12
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15
  16 #include <gcj/cni.h>
  17 #include <jvm.h>
  18
  19 #include <gnu/java/lang/MainThread.h>
  20
  21 typedef void main_func (jobject);
  22
  23 void
  24 gnu::java::lang::MainThread::call_main (void)
  25 {
  26   Utf8Const* main_signature = _Jv_makeUtf8Const ("([Ljava.lang.String;)V", 22);
  27   Utf8Const* main_name = _Jv_makeUtf8Const ("main", 4);
  28
  29   _Jv_Method *meth = _Jv_LookupDeclaredMethod (klass, main_name,
  30                                                main_signature);
  31
  32   // Some checks from Java Spec section 12.1.4.
  33   const char *msg = NULL;
  34   if (meth == NULL)
  35     msg = "no suitable method `main' in class";
  36   else if (! ::java::lang::reflect::Modifier::isStatic(meth->accflags))
  37     msg = "`main' must be static";
  38   else if (! ::java::lang::reflect::Modifier::isPublic(meth->accflags))
  39     msg =  "`main' must be public";
  40   if (msg != NULL)
  41     {
  42       fprintf (stderr, "%s\n", msg);
  43       ::exit(1);
  44     }
  45
  46   main_func *real_main = (main_func *) meth->ncode;
  47   (*real_main) (args);
  48 }