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Diffstat (limited to 'gcc/ada/3vtrasym.adb')
| -rw-r--r-- | gcc/ada/3vtrasym.adb | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/gcc/ada/3vtrasym.adb b/gcc/ada/3vtrasym.adb new file mode 100644 index 00000000000..26382c11130 --- /dev/null +++ b/gcc/ada/3vtrasym.adb @@ -0,0 +1,185 @@ +------------------------------------------------------------------------------ +-- -- +-- 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) 1999-2003 Ada Core Technologies, 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, 59 Temple Place - Suite 330, Boston, -- +-- MA 02111-1307, 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 is maintained by Ada Core Technologies Inc (http://www.gnat.com). -- +-- -- +------------------------------------------------------------------------------ + +-- Run-time symbolic traceback support for VMS + +with Ada.Exceptions.Traceback; use Ada.Exceptions.Traceback; +with Interfaces.C; +with Interfaces.C.Strings; +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.Strings; + use System; + use System.Aux_DEC; + use System.Traceback_Entries; + + type Dscdef1_Type is record + Maxstrlen : Unsigned_Word; + Dtype : Unsigned_Byte; + Class : Unsigned_Byte; + Pointer : chars_ptr; + end record; + + for Dscdef1_Type use record + Maxstrlen at 0 range 0 .. 15; + Dtype at 2 range 0 .. 7; + Class at 3 range 0 .. 7; + Pointer at 4 range 0 .. 31; + end record; + for Dscdef1_Type'Size use 64; + + Image_Buf : String (1 .. 10240); + Image_Len : Integer; + Image_Need_Hdr : Boolean := True; + Image_Do_Another_Line : Boolean; + Image_Xtra_Msg : Boolean; + + procedure Traceback_Image (Out_Desc : access Dscdef1_Type); + + procedure Traceback_Image (Out_Desc : access Dscdef1_Type) is + Image : String (1 .. Integer (Out_Desc.Maxstrlen)); + begin + Image := Value (Out_Desc.Pointer, + Interfaces.C.size_t (Out_Desc.Maxstrlen)); + + if Image_Do_Another_Line and then + (Image_Need_Hdr or else + Image (Image'First .. Image'First + 27) /= + " image module routine") + then + declare + First : Integer := Image_Len + 1; + Last : Integer := First + Image'Length - 1; + begin + Image_Buf (First .. Last + 1) := Image & ASCII.LF; + Image_Len := Last + 1; + end; + + Image_Need_Hdr := False; + + if Image (Image'First .. Image'First + 3) = "----" then + if Image_Xtra_Msg = False then + Image_Xtra_Msg := True; + else + Image_Xtra_Msg := False; + end if; + end if; + + if Out_Desc.Maxstrlen = 79 and then not Image_Xtra_Msg then + Image_Len := Image_Len - 1; + Image_Do_Another_Line := False; + end if; + end if; + end Traceback_Image; + + subtype User_Arg_Type is Unsigned_Longword; + subtype Cond_Value_Type is Unsigned_Longword; + + procedure Show_Traceback + (Status : out Cond_Value_Type; + Faulting_FP : Address; + Faulting_SP : Address; + Faulting_PC : Address; + Detail_Level : Integer := Integer'Null_Parameter; + User_Act_Proc : Address := Address'Null_Parameter; + User_Arg_Value : User_Arg_Type := User_Arg_Type'Null_Parameter; + Exceptionn : Unsigned_Longword := Unsigned_Longword'Null_Parameter); + + pragma Interface (External, Show_Traceback); + + pragma Import_Valued_Procedure + (Show_Traceback, "TBK$SHOW_TRACEBACK", + (Cond_Value_Type, Address, Address, Address, Integer, Address, + User_Arg_Type, Unsigned_Longword), + (Value, Value, Value, Value, Reference, Value, Value, Reference), + Detail_Level); + + + ------------------------ + -- Symbolic_Traceback -- + ------------------------ + + function Symbolic_Traceback (Traceback : Tracebacks_Array) return String is + Res : String (1 .. 256 * Traceback'Length); + Len : Integer; + Status : Cond_Value_Type; + + 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 I in Traceback'Range loop + Image_Len := 0; + Image_Do_Another_Line := True; + Image_Xtra_Msg := False; + + Show_Traceback + (Status, + FP_For (Traceback (I)), + SP_For (Traceback (I)), + PC_For (Traceback (I)), + 0, + Traceback_Image'Address); + + declare + First : Integer := Len + 1; + Last : Integer := First + Image_Len - 1; + begin + Res (First .. Last + 1) := Image_Buf & ASCII.LF; + Len := Last + 1; + 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; |