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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
------------------------------------------------------------------------------
-- --
-- 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) 2002-2025, 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;
with Interfaces.C; use Interfaces.C;
package body GNAT.Exception_Actions is
Global_Action : Exception_Action;
pragma Import
(Ada, Global_Action, "__gnat_exception_actions_global_action");
pragma Atomic (Global_Action);
-- Imported from Ada.Exceptions. Any change in the external name needs to
-- be coordinated with a-exextr.adb.
Global_Unhandled_Action : Exception_Action;
pragma Import
(Ada, Global_Unhandled_Action,
"__gnat_exception_actions_global_unhandled_action");
pragma Atomic (Global_Unhandled_Action);
-- Imported from Ada.Exceptions. Any change in the external name needs to
-- be coordinated with a-exextr.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
Global_Action := Action;
end Register_Global_Action;
--------------------------------------
-- Register_Global_Unhandled_Action --
--------------------------------------
procedure Register_Global_Unhandled_Action (Action : Exception_Action) is
begin
Global_Unhandled_Action := Action;
end Register_Global_Unhandled_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;
------------------------
-- Exception_Language --
------------------------
function Exception_Language
(E : Exception_Occurrence)
return Exception_Languages is
Foreign_Exception : aliased Exception_Data;
pragma Import
(Ada, Foreign_Exception, "system__exceptions__foreign_exception");
function To_Exception_Data_Ptr is new
Ada.Unchecked_Conversion (Exception_Id, Exception_Data_Ptr);
IdD : constant Exception_Data_Ptr
:= To_Exception_Data_Ptr (Exception_Identity (E));
Lang : constant Character := IdD.Lang;
begin
if Lang in 'B' .. 'C' then
return EL_Cpp;
end if;
if Lang /= 'A' then
return EL_Unknown;
end if;
if IdD /= Foreign_Exception'Unchecked_Access then
return EL_Ada;
end if;
declare
function Get_Exception_Machine_Occurrence
(E : Exception_Occurrence) return System.Address;
pragma Import (Ada, Get_Exception_Machine_Occurrence,
"__gnat_get_exception_machine_occurrence");
function Exception_Language_Is_CPlusPlus
(E : System.Address)
return C_bool;
pragma Import (C, Exception_Language_Is_CPlusPlus,
"__gnat_exception_language_is_cplusplus");
function Exception_Language_Is_Ada
(E : System.Address)
return C_bool;
pragma Import (C, Exception_Language_Is_Ada,
"__gnat_exception_language_is_ada");
Occurrence : constant System.Address
:= Get_Exception_Machine_Occurrence (E);
begin
if Exception_Language_Is_CPlusPlus (Occurrence) then
return EL_Cpp;
elsif Exception_Language_Is_Ada (Occurrence) then
-- This might some day indicate third-party Ada exceptions.
-- With GNAT exceptions, we should not reach this point.
return EL_Ada;
end if;
end;
return EL_Unknown;
end Exception_Language;
--------------------------
-- Is_Foreign_Exception --
--------------------------
function Is_Foreign_Exception (E : Exception_Occurrence) return Boolean is
begin
return Exception_Language (E) /= EL_Ada;
end Is_Foreign_Exception;
----------------
-- Name_To_Id --
----------------
function Name_To_Id (Name : String) return Exception_Id is
begin
return To_Id (Internal_Exception (Name, Create_If_Not_Exist => 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;
|
