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-- GHDL Run Time (GRT) - Symbolization using gcc libbacktrace.
-- Copyright (C) 2015 Tristan Gingold
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program. If not, see <gnu.org/licenses>.
--
-- As a special exception, if other files instantiate generics from this
-- unit, or you link this unit with other files to produce an executable,
-- this unit does not by itself cause the resulting executable to be
-- covered by the GNU General Public License. This exception does not
-- however invalidate any other reasons why the executable file might be
-- covered by the GNU Public License.
with System; use System;
package body Grt.Backtraces.Gcc is
-- From backtrace.h
type Backtrace_Error_Callback is access procedure
(Data : System.Address; Msg : Address; Errnum : Integer);
pragma Convention (C, Backtrace_Error_Callback);
type Backtrace_State is null record;
pragma Convention (C, Backtrace_State);
type Backtrace_State_Acc is access all Backtrace_State;
pragma Convention (C, Backtrace_State_Acc);
function Backtrace_Create_State (Filename : Address;
Threaded : Integer;
Error_Callback : Backtrace_Error_Callback;
Data : System.Address)
return Backtrace_State_Acc;
pragma Import (C, Backtrace_Create_State);
type Backtrace_Full_Callback is access function
(Data : System.Address;
Pc : Address;
Filename : System.Address;
Lineno : Integer;
Function_Name : System.Address)
return Integer;
pragma Convention (C, Backtrace_Full_Callback);
function Backtrace_Pcinfo (State : Backtrace_State_Acc;
Pc : Address;
Callback : Backtrace_Full_Callback;
Error_Callback : Backtrace_Error_Callback;
Data : System.Address)
return Integer;
pragma Import (C, Backtrace_Pcinfo);
State : Backtrace_State_Acc;
Initialized : Boolean := False;
Res_Filename : System.Address;
Res_Lineno : Natural;
Res_Subprg : System.Address;
procedure Error_Cb
(Data : Address; Msg : Address; Errnum : Integer);
pragma Convention (C, Error_Cb);
procedure Error_Cb
(Data : Address; Msg : Address; Errnum : Integer) is
begin
null;
end Error_Cb;
function Cb (Data : System.Address;
Pc : Address;
Filename : System.Address;
Lineno : Integer;
Function_Name : System.Address)
return Integer;
pragma Convention (C, Cb);
function Cb (Data : System.Address;
Pc : Address;
Filename : System.Address;
Lineno : Integer;
Function_Name : System.Address)
return Integer
is
pragma Unreferenced (Data, Pc);
begin
if Res_Filename = Null_Address then
Res_Filename := Filename;
Res_Lineno := Lineno;
Res_Subprg := Function_Name;
end if;
return 0;
end Cb;
procedure Symbolizer (Pc : System.Address;
Filename : out System.Address;
Lineno : out Natural;
Subprg : out System.Address)
is
Res : Integer;
pragma Unreferenced (Res);
begin
if not Initialized then
Initialized := True;
State := Backtrace_Create_State
(Null_Address, 0, Error_Cb'Access, Null_Address);
end if;
Res_Filename := Null_Address;
Res_Lineno := 0;
Res_Subprg := Null_Address;
if State /= null then
Res := Backtrace_Pcinfo
(State, Pc, Cb'access, Error_Cb'Access, Null_Address);
end if;
Filename := Res_Filename;
Lineno := Res_Lineno;
Subprg := Res_Subprg;
end Symbolizer;
end Grt.Backtraces.Gcc;
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