1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- S Y S T E M . T R A C E B A C K --
9 -- Copyright (C) 1999-2015, AdaCore --
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. --
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. --
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/>. --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
30 ------------------------------------------------------------------------------
32 -- This version uses System.Machine_State_Operations routines
34 with System
.Machine_State_Operations
;
36 package body System
.Traceback
is
38 use System
.Machine_State_Operations
;
41 (Traceback
: System
.Address
;
44 Exclude_Min
: System
.Address
:= System
.Null_Address
;
45 Exclude_Max
: System
.Address
:= System
.Null_Address
;
46 Skip_Frames
: Natural := 1);
47 -- Same as the exported version, but takes Traceback as an Address
54 (Traceback
: System
.Address
;
57 Exclude_Min
: System
.Address
:= System
.Null_Address
;
58 Exclude_Max
: System
.Address
:= System
.Null_Address
;
59 Skip_Frames
: Natural := 1)
61 type Tracebacks_Array
is array (1 .. Max_Len
) of Code_Loc
;
62 pragma Suppress_Initialization
(Tracebacks_Array
);
67 Trace
: Tracebacks_Array
;
68 for Trace
'Address use Traceback
;
70 N_Skips
: Natural := 0;
73 M
:= Allocate_Machine_State
;
74 Set_Machine_State
(M
);
76 -- Skip the requested number of frames
79 Code
:= Get_Code_Loc
(M
);
80 exit when Code
= Null_Address
or else N_Skips
= Skip_Frames
;
83 N_Skips
:= N_Skips
+ 1;
86 -- Now, record the frames outside the exclusion bounds, updating
87 -- the Len output value along the way.
91 Code
:= Get_Code_Loc
(M
);
92 exit when Code
= Null_Address
or else Len
= Max_Len
;
94 if Code
< Exclude_Min
or else Code
> Exclude_Max
then
102 Free_Machine_State
(M
);
106 (Traceback
: in out System
.Traceback_Entries
.Tracebacks_Array
;
109 Exclude_Min
: System
.Address
:= System
.Null_Address
;
110 Exclude_Max
: System
.Address
:= System
.Null_Address
;
111 Skip_Frames
: Natural := 1)
115 (Traceback
'Address, Max_Len
, Len
,
116 Exclude_Min
, Exclude_Max
,
118 -- Skip one extra frame to skip the other Call_Chain entry as well
120 Skip_Frames
=> Skip_Frames
+ 1);
127 function C_Call_Chain
128 (Traceback
: System
.Address
;
129 Max_Len
: Natural) return Natural
133 Call_Chain
(Traceback
, Max_Len
, Val
);
137 end System
.Traceback
;