1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- S Y S T E M . T R A C E B A C K --
9 -- Copyright (C) 1999-2003 Free Software Foundation, Inc. --
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, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
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. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 -- This is the default version of this package
36 -- Note: this unit must be compiled using -fno-optimize-sibling-calls.
37 -- See comment below in body of Call_Chain for details on the reason.
39 package body System.Traceback is
46 (Traceback : System.Address;
53 Call_Chain (Traceback, Max_Len, Val);
62 (Traceback : System.Address;
64 Exclude_Min : System.Address;
65 Exclude_Max : System.Address;
66 Skip_Frames : Integer)
68 pragma Import (C, Backtrace, "__gnat_backtrace");
71 (Traceback : System.Address;
74 Exclude_Min : System.Address := System.Null_Address;
75 Exclude_Max : System.Address := System.Null_Address;
76 Skip_Frames : Natural := 1)
79 -- Note: Backtrace relies on the following call actually creating a
80 -- stack frame. To ensure that this is the case, it is essential to
81 -- compile this unit without sibling call optimization.
83 -- We want the underlying engine to skip its own frame plus the
84 -- ones we have been requested to skip ourselves.
86 Len := Backtrace (Traceback => Traceback,
88 Exclude_Min => Exclude_Min,
89 Exclude_Max => Exclude_Max,
90 Skip_Frames => Skip_Frames + 1);