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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) 2005-2010, 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 3, 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- 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 IA64/VMS
with Ada.Exceptions.Traceback; use Ada.Exceptions.Traceback;
with System;
with System.Aux_DEC;
with System.Soft_Links;
with System.Traceback_Entries;
package body GNAT.Traceback.Symbolic is
use System;
use System.Aux_DEC;
use System.Traceback_Entries;
subtype Var_String_Buf is String (1 .. 254);
type Var_String is record
Curlen : Unsigned_Word := 0;
Buf : Var_String_Buf;
end record;
pragma Convention (C, Var_String);
for Var_String'Size use 8 * 256;
type Descriptor64 is record
Mbo : Unsigned_Word;
Dtype : Unsigned_Byte;
Class : Unsigned_Byte;
Mbmo : Unsigned_Longword;
Maxstrlen : Integer_64;
Pointer : Address;
end record;
pragma Convention (C, Descriptor64);
subtype Cond_Value_Type is Unsigned_Longword;
-- TBK_API_PARAM as defined in TBKDEF
type Tbk_Api_Param is record
Length : Unsigned_Word;
T_Type : Unsigned_Byte;
Version : Unsigned_Byte;
Reserveda : Unsigned_Longword;
Faulting_Pc : Address;
Faulting_Fp : Address;
Filename_Desc : Address;
Library_Module_Desc : Address;
Record_Number : Address;
Image_Desc : Address;
Module_Desc : Address;
Routine_Desc : Address;
Listing_Lineno : Address;
Rel_Pc : Address;
Image_Base_Addr : Address;
Module_Base_Addr : Address;
Malloc_Rtn : Address;
Free_Rtn : Address;
Symbolize_Flags : Address;
Reserved0 : Unsigned_Quadword;
Reserved1 : Unsigned_Quadword;
Reserved2 : Unsigned_Quadword;
end record;
pragma Convention (C, Tbk_Api_Param);
K_Version : constant Unsigned_Byte := 1;
-- Current API version
K_Length : constant Unsigned_Word := 152;
-- Length of the parameter
pragma Compile_Time_Error (Tbk_Api_Param'Size = K_Length * 8,
"Bad length for tbk_api_param");
-- Sanity check
function Symbolize (Param : Address) return Cond_Value_Type;
pragma Import (C, Symbolize, "TBK$I64_SYMBOLIZE");
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 '.'
procedure Setup_Descriptor64_Vs (Desc : out Descriptor64; Var : Address);
-- Setup descriptor Desc for address Var
---------------------
-- 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;
---------------------------
-- Setup_Descriptor64_Vs --
---------------------------
procedure Setup_Descriptor64_Vs (Desc : out Descriptor64; Var : Address) is
K_Dtype_Vt : constant Unsigned_Byte := 37;
K_Class_Vs : constant Unsigned_Byte := 11;
begin
Desc.Mbo := 1;
Desc.Dtype := K_Dtype_Vt;
Desc.Class := K_Class_Vs;
Desc.Mbmo := -1;
Desc.Maxstrlen := Integer_64 (Var_String_Buf'Length);
Desc.Pointer := Var;
end Setup_Descriptor64_Vs;
------------------------
-- Symbolic_Traceback --
------------------------
function Symbolic_Traceback (Traceback : Tracebacks_Array) return String is
Param : Tbk_Api_Param;
Status : Cond_Value_Type;
Record_Number : Unsigned_Longword;
Image_Name : Var_String;
Image_Dsc : Descriptor64;
Module_Name : Var_String;
Module_Dsc : Descriptor64;
Routine_Name : Var_String;
Routine_Dsc : Descriptor64;
Line_Number : Unsigned_Longword;
Res : String (1 .. 256 * Traceback'Length);
Len : Integer;
begin
if Traceback'Length = 0 then
return "";
end if;
Len := 0;
-- Since image computation is not thread-safe we need task lockout
System.Soft_Links.Lock_Task.all;
-- Initialize descriptors
Setup_Descriptor64_Vs (Image_Dsc, Image_Name'Address);
Setup_Descriptor64_Vs (Module_Dsc, Module_Name'Address);
Setup_Descriptor64_Vs (Routine_Dsc, Routine_Name'Address);
for J in Traceback'Range loop
-- Initialize fields in case they are not written
Record_Number := 0;
Line_Number := 0;
Image_Name.Curlen := 0;
Module_Name.Curlen := 0;
Routine_Name.Curlen := 0;
-- Symbolize
Param := (Length => K_Length,
T_Type => 0,
Version => K_Version,
Reserveda => 0,
Faulting_Pc => PC_For (Traceback (J)),
Faulting_Fp => 0,
Filename_Desc => Null_Address,
Library_Module_Desc => Null_Address,
Record_Number => Record_Number'Address,
Image_Desc => Image_Dsc'Address,
Module_Desc => Module_Dsc'Address,
Routine_Desc => Routine_Dsc'Address,
Listing_Lineno => Line_Number'Address,
Rel_Pc => Null_Address,
Image_Base_Addr => Null_Address,
Module_Base_Addr => Null_Address,
Malloc_Rtn => Null_Address,
Free_Rtn => Null_Address,
Symbolize_Flags => Null_Address,
Reserved0 => (0, 0),
Reserved1 => (0, 0),
Reserved2 => (0, 0));
Status := Symbolize (Param'Address);
-- Check for success (marked by bit 0)
if (Status rem 2) = 1 then
-- Success
if Line_Number = 0 then
-- As GCC doesn't emit source file correlation, use record
-- number of line number is not set
Line_Number := Record_Number;
end if;
declare
First : constant Integer := Len + 1;
Last : Integer := First + 80 - 1;
Pos : Integer;
Routine_Name_D : constant String :=
Decode_Ada_Name
(Routine_Name.Buf
(1 .. Natural (Routine_Name.Curlen)));
Lineno : constant String :=
Unsigned_Longword'Image (Line_Number);
begin
Res (First .. Last) := (others => ' ');
Res (First .. First + Natural (Image_Name.Curlen) - 1) :=
Image_Name.Buf (1 .. Natural (Image_Name.Curlen));
Res (First + 10 ..
First + 10 + Natural (Module_Name.Curlen) - 1) :=
Module_Name.Buf (1 .. Natural (Module_Name.Curlen));
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 + Lineno'Length - 1) := Lineno;
Res (Last) := ASCII.LF;
Len := Last;
end;
-- Failure (bit 0 clear)
else
Res (Len + 1 .. Len + 6) := "ERROR" & ASCII.LF;
Len := Len + 6;
end if;
end loop;
System.Soft_Links.Unlock_Task.all;
return Res (1 .. Len);
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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