gcc/ada/raise.c

   1 /****************************************************************************
   2  *                                                                          *
   3  *                         GNAT COMPILER COMPONENTS                         *
   4  *                                                                          *
   5  *                                R A I S E                                 *
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   7  *                          C Implementation File                           *
   8  *                                                                          *
   9  *             Copyright (C) 1992-2005, Free Software Foundation, Inc.      *
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  11  * GNAT is free software;  you can  redistribute it  and/or modify it under *
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  16  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
  17  * for  more details.  You should have  received  a copy of the GNU General *
  18  * Public License  distributed with GNAT;  see file COPYING.  If not, write *
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  25  * ion does not  however invalidate  any other reasons  why the  executable *
  26  * file might be covered by the  GNU Public License.                        *
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  28  * GNAT was originally developed  by the GNAT team at  New York University. *
  29  * Extensive contributions were provided by Ada Core Technologies Inc.      *
  30  *                                                                          *
  31  ****************************************************************************/
  32
  33 /* Shared routines to support exception handling.
  34    Note that _gnat_builtin_longjmp should disappear at some point, replaced
  35    by direct call to __builtin_longjmp from Ada code.
  36    __gnat_unhandled_terminate is code shared between all exception handling
  37    mechanisms */
  38
  39 #ifdef IN_RTS
  40 #include "tconfig.h"
  41 #include "tsystem.h"
  42 #else
  43 #include "config.h"
  44 #include "system.h"
  45 #endif
  46
  47 #include "adaint.h"
  48 #include "raise.h"
  49
  50 /*  We have not yet figured out how to import this directly */
  51
  52 void
  53 _gnat_builtin_longjmp (void *ptr, int flag ATTRIBUTE_UNUSED)
  54 {
  55    __builtin_longjmp (ptr, 1);
  56 }
  57
  58 /* When an exception is raised for which no handler exists, the procedure
  59    Ada.Exceptions.Unhandled_Exception is called, which performs the call to
  60    adafinal to complete finalization, and then prints out the error messages
  61    for the unhandled exception. The final step is to call this routine, which
  62    performs any system dependent cleanup required.  */
  63
  64 void
  65 __gnat_unhandled_terminate (void)
  66 {
  67 #ifdef VMS
  68   /* Special termination handling for VMS */
  69   long prvhnd;
  70
  71   /* Remove the exception vector so it won't intercept any errors
  72      in the call to exit, and go into and endless loop */
  73
  74   SYS$SETEXV (1, 0, 3, &prvhnd);
  75 #endif
  76
  77   /* Default termination handling */
  78   __gnat_os_exit (1);
  79 }