------------------------------------------------------------------------------ -- -- -- 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) 2005-2007, 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 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 pragma Warnings (Off); pragma Linker_Options ("--for-linker=sys$library:trace.exe"); use System; use System.Aux_DEC; use System.Traceback_Entries; subtype Var_String_Buf is String (1 .. 254); type Var_String is record Curlen : Unsigned_Word := 0; Buf : Var_String_Buf; end record; pragma Convention (C, Var_String); for Var_String'Size use 8 * 256; type Descriptor64 is record Mbo : Unsigned_Word; Dtype : Unsigned_Byte; Class : Unsigned_Byte; Mbmo : Unsigned_Longword; Maxstrlen : Integer_64; Pointer : Address; end record; pragma Convention (C, Descriptor64); subtype Cond_Value_Type is Unsigned_Longword; function Symbolize (Current_PC : Address; Filename_Dsc : Address; Library_Dsc : Address; Record_Number : Address; Image_Dsc : Address; Module_Dsc : Address; Routine_Dsc : Address; Line_Number : Address; Relative_PC : Address) return Cond_Value_Type; pragma Import (C, Symbolize, "TBK$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 Status : Cond_Value_Type; Filename_Name : Var_String; Filename_Dsc : Descriptor64; Library_Name : Var_String; Library_Dsc : Descriptor64; Record_Number : Integer_64; Image_Name : Var_String; Image_Dsc : Descriptor64; Module_Name : Var_String; Module_Dsc : Descriptor64; Routine_Name : Var_String; Routine_Dsc : Descriptor64; Line_Number : Integer_64; Relative_PC : Integer_64; 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; Setup_Descriptor64_Vs (Filename_Dsc, Filename_Name'Address); Setup_Descriptor64_Vs (Library_Dsc, Library_Name'Address); 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 Status := Symbolize (PC_For (Traceback (J)), Filename_Dsc'Address, Library_Dsc'Address, Record_Number'Address, Image_Dsc'Address, Module_Dsc'Address, Routine_Dsc'Address, Line_Number'Address, Relative_PC'Address); declare First : Integer := Len + 1; Last : Integer := First + 80 - 1; Pos : Integer; Routine_Name_D : String := Decode_Ada_Name (Routine_Name.Buf (1 .. Natural (Routine_Name.Curlen))); 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 + Integer_64'Image (Line_Number)'Length - 1) := Integer_64'Image (Line_Number); Res (Last) := ASCII.LF; Len := Last; end; 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;