summaryrefslogtreecommitdiff
path: root/gcc/ada/g-excact.adb
blob: 1ba4cf8d64e1b0e838b4a5beb8bb076b0aff4292 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--              G N A T . E X C E P T I O N _ A C T I O N S                 --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--          Copyright (C) 2002-2009, Free Software Foundation, Inc.         --
--                                                                          --
-- GNAT is free software;  you can  redistribute it  and/or modify it under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
--                                                                          --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception,   --
-- version 3.1, as published by the Free Software Foundation.               --
--                                                                          --
-- You should have received a copy of the GNU General Public License and    --
-- a copy of the GCC Runtime Library Exception along with this program;     --
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
-- <http://www.gnu.org/licenses/>.                                          --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

with Ada.Unchecked_Conversion;
with System;
with System.Soft_Links;       use System.Soft_Links;
with System.Standard_Library; use System.Standard_Library;
with System.Exception_Table;  use System.Exception_Table;

package body GNAT.Exception_Actions is

   Global_Action : Exception_Action;
   pragma Import (C, Global_Action, "__gnat_exception_actions_global_action");
   --  Imported from Ada.Exceptions. Any change in the external name needs to
   --  be coordinated with a-except.adb

   Raise_Hook_Initialized : Boolean;
   pragma Import
     (Ada, Raise_Hook_Initialized, "__gnat_exception_actions_initialized");

   function To_Raise_Action is new Ada.Unchecked_Conversion
     (Exception_Action, Raise_Action);

   --  ??? Would be nice to have this in System.Standard_Library
   function To_Data is new Ada.Unchecked_Conversion
     (Exception_Id, Exception_Data_Ptr);
   function To_Id is new Ada.Unchecked_Conversion
     (Exception_Data_Ptr, Exception_Id);

   ----------------------------
   -- Register_Global_Action --
   ----------------------------

   procedure Register_Global_Action (Action : Exception_Action) is
   begin
      Lock_Task.all;
      Global_Action := Action;
      Unlock_Task.all;
   end Register_Global_Action;

   ------------------------
   -- Register_Id_Action --
   ------------------------

   procedure Register_Id_Action
     (Id     : Exception_Id;
      Action : Exception_Action)
   is
   begin
      if Id = Null_Id then
         raise Program_Error;
      end if;

      Lock_Task.all;
      To_Data (Id).Raise_Hook := To_Raise_Action (Action);
      Raise_Hook_Initialized := True;
      Unlock_Task.all;
   end Register_Id_Action;

   ---------------
   -- Core_Dump --
   ---------------

   procedure Core_Dump (Occurrence : Exception_Occurrence) is separate;

   ----------------
   -- Name_To_Id --
   ----------------

   function Name_To_Id (Name : String) return Exception_Id is
   begin
      return To_Id (Internal_Exception (Name, False));
   end Name_To_Id;

   ---------------------------------
   -- Registered_Exceptions_Count --
   ---------------------------------

   function Registered_Exceptions_Count return Natural renames
     System.Exception_Table.Registered_Exceptions_Count;

   -------------------------------
   -- Get_Registered_Exceptions --
   -------------------------------
   --  This subprogram isn't an iterator to avoid concurrency problems,
   --  since the exceptions are registered dynamically. Since we have to lock
   --  the runtime while computing this array, this means that any callback in
   --  an active iterator would be unable to access the runtime.

   procedure Get_Registered_Exceptions
     (List : out Exception_Id_Array;
      Last : out Integer)
   is
      Ids : Exception_Data_Array (List'Range);
   begin
      Get_Registered_Exceptions (Ids, Last);

      for L in List'First .. Last loop
         List (L) := To_Id (Ids (L));
      end loop;
   end Get_Registered_Exceptions;

end GNAT.Exception_Actions;