gcc/ada/s-except.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                    S Y S T E M . E X C E P T I O N S                     --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2006-2007, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  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 --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 --  This package contains internal routines used as debugger helpers.
  35 --  It should be compiled without optimization to let debuggers inspect
  36 --  parameter values reliably from breakpoints on the routines.
  37
  38 pragma Warnings (Off);
  39 pragma Compiler_Unit;
  40 pragma Warnings (On);
  41
  42 with System.Standard_Library;
  43
  44 package System.Exceptions is
  45
  46    pragma Warnings (Off);
  47    pragma Preelaborate_05;
  48    pragma Warnings (On);
  49    --  To let Ada.Exceptions "with" us and let us "with" Standard_Library
  50
  51    package SSL renames System.Standard_Library;
  52    --  To let some of the hooks below have formal parameters typed in
  53    --  accordance with what GDB expects.
  54
  55    procedure Debug_Raise_Exception (E : SSL.Exception_Data_Ptr);
  56    pragma Export
  57      (Ada, Debug_Raise_Exception, "__gnat_debug_raise_exception");
  58    --  Hook called at a "raise" point for an exception E, when it is
  59    --  just about to be propagated.
  60
  61    procedure Debug_Unhandled_Exception (E : SSL.Exception_Data_Ptr);
  62    pragma Export
  63      (Ada, Debug_Unhandled_Exception, "__gnat_unhandled_exception");
  64    --  Hook called during the propagation process of an exception E, as soon
  65    --  as it is known to be unhandled.
  66
  67    procedure Debug_Raise_Assert_Failure;
  68    pragma Export
  69      (Ada, Debug_Raise_Assert_Failure, "__gnat_debug_raise_assert_failure");
  70    --  Hook called when an assertion failed. This is used by the debugger to
  71    --  intercept assertion failures, and treat them specially.
  72
  73    procedure Local_Raise (Excep : System.Address);
  74    pragma Export (Ada, Local_Raise);
  75    --  This is a dummy routine, used only by the debugger for the purpose of
  76    --  logging local raise statements that were transformed into a direct goto
  77    --  to the handler code. The compiler in this case generates:
  78    --
  79    --    Local_Raise (exception_data'address);
  80    --    goto Handler
  81    --
  82    --  The argument is the address of the exception data
  83
  84 end System.Exceptions;