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) 2006-2009, 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 3,  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.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 --  This package contains internal routines used as debugger helpers.
  33 --  It should be compiled without optimization to let debuggers inspect
  34 --  parameter values reliably from breakpoints on the routines.
  35
  36 pragma Compiler_Unit;
  37
  38 with System.Standard_Library;
  39
  40 package System.Exceptions is
  41
  42    pragma Preelaborate_05;
  43    --  To let Ada.Exceptions "with" us and let us "with" Standard_Library
  44
  45    package SSL renames System.Standard_Library;
  46    --  To let some of the hooks below have formal parameters typed in
  47    --  accordance with what GDB expects.
  48
  49    procedure Debug_Raise_Exception (E : SSL.Exception_Data_Ptr);
  50    pragma Export
  51      (Ada, Debug_Raise_Exception, "__gnat_debug_raise_exception");
  52    --  Hook called at a "raise" point for an exception E, when it is
  53    --  just about to be propagated.
  54
  55    procedure Debug_Unhandled_Exception (E : SSL.Exception_Data_Ptr);
  56    pragma Export
  57      (Ada, Debug_Unhandled_Exception, "__gnat_unhandled_exception");
  58    --  Hook called during the propagation process of an exception E, as soon
  59    --  as it is known to be unhandled.
  60
  61    procedure Debug_Raise_Assert_Failure;
  62    pragma Export
  63      (Ada, Debug_Raise_Assert_Failure, "__gnat_debug_raise_assert_failure");
  64    --  Hook called when an assertion failed. This is used by the debugger to
  65    --  intercept assertion failures, and treat them specially.
  66
  67    procedure Local_Raise (Excep : System.Address);
  68    pragma Export (Ada, Local_Raise);
  69    --  This is a dummy routine, used only by the debugger for the purpose of
  70    --  logging local raise statements that were transformed into a direct goto
  71    --  to the handler code. The compiler in this case generates:
  72    --
  73    --    Local_Raise (exception_data'address);
  74    --    goto Handler
  75    --
  76    --  The argument is the address of the exception data
  77
  78 end System.Exceptions;