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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- G N A T . T R A C E B A C K . S Y M B O L I C --
-- --
-- B o d y --
-- --
-- Copyright (C) 1999-2005, 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 2, 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. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, USA. --
-- --
-- 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. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- Run-time symbolic traceback support for Alpha/VMS
with Ada.Exceptions.Traceback; use Ada.Exceptions.Traceback;
with Interfaces.C;
with System;
with System.Aux_DEC;
with System.Soft_Links;
with System.Traceback_Entries;
package body GNAT.Traceback.Symbolic is
pragma Warnings (Off);
pragma Linker_Options ("--for-linker=sys$library:trace.exe");
use Interfaces.C;
use System;
use System.Aux_DEC;
use System.Traceback_Entries;
subtype User_Arg_Type is Unsigned_Longword;
subtype Cond_Value_Type is Unsigned_Longword;
type ASCIC is record
Count : unsigned_char;
Data : char_array (1 .. 255);
end record;
pragma Convention (C, ASCIC);
for ASCIC use record
Count at 0 range 0 .. 7;
Data at 1 range 0 .. 8 * 255 - 1;
end record;
for ASCIC'Size use 8 * 256;
function Fetch_ASCIC is new Fetch_From_Address (ASCIC);
procedure Symbolize
(Status : out Cond_Value_Type;
Current_PC : in Address;
Adjusted_PC : in Address;
Current_FP : in Address;
Current_R26 : in Address;
Image_Name : out Address;
Module_Name : out Address;
Routine_Name : out Address;
Line_Number : out Integer;
Relative_PC : out Address;
Absolute_PC : out Address;
PC_Is_Valid : out Long_Integer;
User_Act_Proc : Address := Address'Null_Parameter;
User_Arg_Value : User_Arg_Type := User_Arg_Type'Null_Parameter);
pragma Interface (External, Symbolize);
pragma Import_Valued_Procedure
(Symbolize, "TBK$SYMBOLIZE",
(Cond_Value_Type, Address, Address, Address, Address,
Address, Address, Address, Integer,
Address, Address, Long_Integer,
Address, User_Arg_Type),
(Value, Value, Value, Value, Value,
Reference, Reference, Reference, Reference,
Reference, Reference, Reference,
Value, Value),
User_Act_Proc);
function Decode_Ada_Name (Encoded_Name : String) return String;
-- Decodes an Ada identifier name. Removes leading "_ada_" and trailing
-- __{DIGIT}+ or ${DIGIT}+, converts other "__" to '.'
---------------------
-- Decode_Ada_Name --
---------------------
function Decode_Ada_Name (Encoded_Name : String) return String is
Decoded_Name : String (1 .. Encoded_Name'Length);
Pos : Integer := Encoded_Name'First;
Last : Integer := Encoded_Name'Last;
DPos : Integer := 1;
begin
if Pos > Last then
return "";
end if;
-- Skip leading _ada_
if Encoded_Name'Length > 4
and then Encoded_Name (Pos .. Pos + 4) = "_ada_"
then
Pos := Pos + 5;
end if;
-- Skip trailing __{DIGIT}+ or ${DIGIT}+
if Encoded_Name (Last) in '0' .. '9' then
for J in reverse Pos + 2 .. Last - 1 loop
case Encoded_Name (J) is
when '0' .. '9' =>
null;
when '$' =>
Last := J - 1;
exit;
when '_' =>
if Encoded_Name (J - 1) = '_' then
Last := J - 2;
end if;
exit;
when others =>
exit;
end case;
end loop;
end if;
-- Now just copy encoded name to decoded name, converting "__" to '.'
while Pos <= Last loop
if Encoded_Name (Pos) = '_' and then Encoded_Name (Pos + 1) = '_'
and then Pos /= Encoded_Name'First
then
Decoded_Name (DPos) := '.';
Pos := Pos + 2;
else
Decoded_Name (DPos) := Encoded_Name (Pos);
Pos := Pos + 1;
end if;
DPos := DPos + 1;
end loop;
return Decoded_Name (1 .. DPos - 1);
end Decode_Ada_Name;
------------------------
-- Symbolic_Traceback --
------------------------
function Symbolic_Traceback (Traceback : Tracebacks_Array) return String is
Status : Cond_Value_Type;
Image_Name : ASCIC;
Image_Name_Addr : Address;
Module_Name : ASCIC;
Module_Name_Addr : Address;
Routine_Name : ASCIC;
Routine_Name_Addr : Address;
Line_Number : Integer;
Relative_PC : Address;
Absolute_PC : Address;
PC_Is_Valid : Long_Integer;
Return_Address : Address;
Res : String (1 .. 256 * Traceback'Length);
Len : Integer;
begin
if Traceback'Length > 0 then
Len := 0;
-- Since image computation is not thread-safe we need task lockout
System.Soft_Links.Lock_Task.all;
for J in Traceback'Range loop
if J = Traceback'Last then
Return_Address := Address_Zero;
else
Return_Address := PC_For (Traceback (J + 1));
end if;
Symbolize
(Status,
PC_For (Traceback (J)),
PC_For (Traceback (J)),
PV_For (Traceback (J)),
Return_Address,
Image_Name_Addr,
Module_Name_Addr,
Routine_Name_Addr,
Line_Number,
Relative_PC,
Absolute_PC,
PC_Is_Valid);
Image_Name := Fetch_ASCIC (Image_Name_Addr);
Module_Name := Fetch_ASCIC (Module_Name_Addr);
Routine_Name := Fetch_ASCIC (Routine_Name_Addr);
declare
First : Integer := Len + 1;
Last : Integer := First + 80 - 1;
Pos : Integer;
Routine_Name_D : String := Decode_Ada_Name
(To_Ada
(Routine_Name.Data (1 .. size_t (Routine_Name.Count)),
False));
begin
Res (First .. Last) := (others => ' ');
Res (First .. First + Integer (Image_Name.Count) - 1) :=
To_Ada
(Image_Name.Data (1 .. size_t (Image_Name.Count)),
False);
Res (First + 10 ..
First + 10 + Integer (Module_Name.Count) - 1) :=
To_Ada
(Module_Name.Data (1 .. size_t (Module_Name.Count)),
False);
Res (First + 30 ..
First + 30 + Routine_Name_D'Length - 1) :=
Routine_Name_D;
-- If routine name doesn't fit 20 characters, output
-- the line number on next line at 50th position
if Routine_Name_D'Length > 20 then
Pos := First + 30 + Routine_Name_D'Length;
Res (Pos) := ASCII.LF;
Last := Pos + 80;
Res (Pos + 1 .. Last) := (others => ' ');
Pos := Pos + 51;
else
Pos := First + 50;
end if;
Res (Pos .. Pos + Integer'Image (Line_Number)'Length - 1) :=
Integer'Image (Line_Number);
Res (Last) := ASCII.LF;
Len := Last;
end;
end loop;
System.Soft_Links.Unlock_Task.all;
return Res (1 .. Len);
else
return "";
end if;
end Symbolic_Traceback;
function Symbolic_Traceback (E : Exception_Occurrence) return String is
begin
return Symbolic_Traceback (Tracebacks (E));
end Symbolic_Traceback;
end GNAT.Traceback.Symbolic;
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