File : a-elchha-lynxos178-cert.adb
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT RUN-TIME COMPONENTS --
4 -- --
5 -- A D A . E X C E P T I O N S . L A S T _ C H A N C E _ H A N D L E R --
6 -- --
7 -- B o d y --
8 -- --
9 -- Copyright (C) 2012-2015, 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 -- --
19 -- --
20 -- --
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 -- Default last chance handler for use with the ravenscar-cert and cert
33 -- run-time libs on LynxOS-178
34
35 -- Dumps exception identity and partial argument string to addr2line for
36 -- generation of a symbolic stack backtrace (when gnatbind -E is used)
37
38 with GNAT.IO; use GNAT.IO;
39 with GNAT.Debug_Utilities; use GNAT.Debug_Utilities;
40 with System.Standard_Library; use System.Standard_Library;
41 with System;
42
43 procedure Ada.Exceptions.Last_Chance_Handler (Except : Exception_Occurrence) is
44
45 Max_Error_Message_Size : constant := 128;
46
47 -- The length of the exception name. We have to subtract one
48 -- because it is NUL-terminated.
49 Exception_Name_Length : constant Integer := Except.Id.Name_Length - 1;
50
51 subtype Error_Message_Size_Type is Integer range
52 1 .. Max_Error_Message_Size;
53
54 ------------------------
55 -- LynxOS-178 Imports --
56 ------------------------
57
58 procedure Stop (ID : Integer := 0);
59 pragma Import (C, Stop, "exit");
60 pragma No_Return (Stop);
61
62 Message : String (1 .. Max_Error_Message_Size);
63
64 Message_Length : Error_Message_Size_Type;
65
66 begin
67 if Exception_Name_Length + 25 > Max_Error_Message_Size then
68 Message_Length := Max_Error_Message_Size;
69 else
70 Message_Length := Exception_Name_Length + 25;
71 end if;
72
73 Message (1 .. 25) := "Unhandled Ada Exception: ";
74 Message (26 .. Message_Length) :=
75 To_Ptr (Except.Id.Full_Name) (1 .. Message_Length - 25);
76
77 New_Line;
78 Put_Line ("In last chance handler");
79 Put_Line (Message (1 .. Message_Length));
80 New_Line;
81
82 Put_Line ("Traceback addresses for addr2line:");
83
84 for J in 1 .. Except.Num_Tracebacks loop
85 Put (Image_C (Except.Tracebacks (J)));
86 Put (" ");
87 end loop;
88
89 New_Line;
90
91 Stop;
92 end Ada.Exceptions.Last_Chance_Handler;