278 lines
9.5 KiB
Ada
278 lines
9.5 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- G N A T . T R A C E B A C K . S Y M B O L I C --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 2005-2009, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- Run-time symbolic traceback support for IA64/VMS
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with Ada.Exceptions.Traceback; use Ada.Exceptions.Traceback;
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with System;
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with System.Aux_DEC;
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with System.Soft_Links;
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with System.Traceback_Entries;
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package body GNAT.Traceback.Symbolic is
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pragma Warnings (Off); -- ??? needs comment
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pragma Linker_Options ("--for-linker=sys$library:trace.exe");
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use System;
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use System.Aux_DEC;
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use System.Traceback_Entries;
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subtype Var_String_Buf is String (1 .. 254);
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type Var_String is record
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Curlen : Unsigned_Word := 0;
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Buf : Var_String_Buf;
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end record;
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pragma Convention (C, Var_String);
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for Var_String'Size use 8 * 256;
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type Descriptor64 is record
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Mbo : Unsigned_Word;
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Dtype : Unsigned_Byte;
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Class : Unsigned_Byte;
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Mbmo : Unsigned_Longword;
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Maxstrlen : Integer_64;
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Pointer : Address;
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end record;
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pragma Convention (C, Descriptor64);
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subtype Cond_Value_Type is Unsigned_Longword;
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function Symbolize
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(Current_PC : Address;
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Filename_Dsc : Address;
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Library_Dsc : Address;
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Record_Number : Address;
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Image_Dsc : Address;
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Module_Dsc : Address;
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Routine_Dsc : Address;
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Line_Number : Address;
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Relative_PC : Address) return Cond_Value_Type;
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pragma Import (C, Symbolize, "TBK$I64_SYMBOLIZE");
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function Decode_Ada_Name (Encoded_Name : String) return String;
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-- Decodes an Ada identifier name. Removes leading "_ada_" and trailing
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-- __{DIGIT}+ or ${DIGIT}+, converts other "__" to '.'
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procedure Setup_Descriptor64_Vs (Desc : out Descriptor64; Var : Address);
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-- Setup descriptor Desc for address Var
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---------------------
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-- Decode_Ada_Name --
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---------------------
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function Decode_Ada_Name (Encoded_Name : String) return String is
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Decoded_Name : String (1 .. Encoded_Name'Length);
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Pos : Integer := Encoded_Name'First;
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Last : Integer := Encoded_Name'Last;
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DPos : Integer := 1;
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begin
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if Pos > Last then
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return "";
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end if;
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-- Skip leading _ada_
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if Encoded_Name'Length > 4
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and then Encoded_Name (Pos .. Pos + 4) = "_ada_"
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then
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Pos := Pos + 5;
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end if;
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-- Skip trailing __{DIGIT}+ or ${DIGIT}+
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if Encoded_Name (Last) in '0' .. '9' then
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for J in reverse Pos + 2 .. Last - 1 loop
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case Encoded_Name (J) is
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when '0' .. '9' =>
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null;
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when '$' =>
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Last := J - 1;
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exit;
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when '_' =>
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if Encoded_Name (J - 1) = '_' then
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Last := J - 2;
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end if;
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exit;
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when others =>
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exit;
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end case;
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end loop;
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end if;
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-- Now just copy encoded name to decoded name, converting "__" to '.'
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while Pos <= Last loop
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if Encoded_Name (Pos) = '_' and then Encoded_Name (Pos + 1) = '_'
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and then Pos /= Encoded_Name'First
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then
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Decoded_Name (DPos) := '.';
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Pos := Pos + 2;
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else
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Decoded_Name (DPos) := Encoded_Name (Pos);
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Pos := Pos + 1;
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end if;
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DPos := DPos + 1;
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end loop;
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return Decoded_Name (1 .. DPos - 1);
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end Decode_Ada_Name;
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---------------------------
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-- Setup_Descriptor64_Vs --
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---------------------------
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procedure Setup_Descriptor64_Vs (Desc : out Descriptor64; Var : Address) is
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K_Dtype_Vt : constant Unsigned_Byte := 37;
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K_Class_Vs : constant Unsigned_Byte := 11;
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begin
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Desc.Mbo := 1;
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Desc.Dtype := K_Dtype_Vt;
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Desc.Class := K_Class_Vs;
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Desc.Mbmo := -1;
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Desc.Maxstrlen := Integer_64 (Var_String_Buf'Length);
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Desc.Pointer := Var;
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end Setup_Descriptor64_Vs;
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------------------------
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-- Symbolic_Traceback --
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------------------------
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function Symbolic_Traceback (Traceback : Tracebacks_Array) return String is
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Status : Cond_Value_Type;
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Filename_Name : Var_String;
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Filename_Dsc : Descriptor64;
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Library_Name : Var_String;
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Library_Dsc : Descriptor64;
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Record_Number : Integer_64;
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Image_Name : Var_String;
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Image_Dsc : Descriptor64;
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Module_Name : Var_String;
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Module_Dsc : Descriptor64;
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Routine_Name : Var_String;
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Routine_Dsc : Descriptor64;
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Line_Number : Integer_64;
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Relative_PC : Integer_64;
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Res : String (1 .. 256 * Traceback'Length);
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Len : Integer;
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begin
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if Traceback'Length = 0 then
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return "";
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end if;
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Len := 0;
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-- Since image computation is not thread-safe we need task lockout
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System.Soft_Links.Lock_Task.all;
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Setup_Descriptor64_Vs (Filename_Dsc, Filename_Name'Address);
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Setup_Descriptor64_Vs (Library_Dsc, Library_Name'Address);
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Setup_Descriptor64_Vs (Image_Dsc, Image_Name'Address);
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Setup_Descriptor64_Vs (Module_Dsc, Module_Name'Address);
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Setup_Descriptor64_Vs (Routine_Dsc, Routine_Name'Address);
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for J in Traceback'Range loop
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Status := Symbolize
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(PC_For (Traceback (J)),
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Filename_Dsc'Address,
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Library_Dsc'Address,
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Record_Number'Address,
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Image_Dsc'Address,
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Module_Dsc'Address,
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Routine_Dsc'Address,
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Line_Number'Address,
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Relative_PC'Address);
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declare
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First : Integer := Len + 1;
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Last : Integer := First + 80 - 1;
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Pos : Integer;
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Routine_Name_D : String :=
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Decode_Ada_Name
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(Routine_Name.Buf
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(1 .. Natural (Routine_Name.Curlen)));
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begin
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Res (First .. Last) := (others => ' ');
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Res (First .. First + Natural (Image_Name.Curlen) - 1) :=
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Image_Name.Buf (1 .. Natural (Image_Name.Curlen));
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Res (First + 10 ..
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First + 10 + Natural (Module_Name.Curlen) - 1) :=
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Module_Name.Buf (1 .. Natural (Module_Name.Curlen));
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Res (First + 30 ..
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First + 30 + Routine_Name_D'Length - 1) :=
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Routine_Name_D;
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-- If routine name doesn't fit 20 characters, output
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-- the line number on next line at 50th position
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if Routine_Name_D'Length > 20 then
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Pos := First + 30 + Routine_Name_D'Length;
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Res (Pos) := ASCII.LF;
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Last := Pos + 80;
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Res (Pos + 1 .. Last) := (others => ' ');
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Pos := Pos + 51;
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else
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Pos := First + 50;
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end if;
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Res (Pos ..
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Pos + Integer_64'Image (Line_Number)'Length - 1) :=
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Integer_64'Image (Line_Number);
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Res (Last) := ASCII.LF;
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Len := Last;
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end;
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end loop;
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System.Soft_Links.Unlock_Task.all;
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return Res (1 .. Len);
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end Symbolic_Traceback;
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function Symbolic_Traceback (E : Exception_Occurrence) return String is
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begin
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return Symbolic_Traceback (Tracebacks (E));
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end Symbolic_Traceback;
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end GNAT.Traceback.Symbolic;
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