| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- S Y S T E M . T R A C E B A C K -- |
| -- -- |
| -- 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 was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- This version assumes that System.Machine_State_Operations.Pop_Frame can |
| -- work with the Info parameter being null. |
| |
| with System.Machine_State_Operations; |
| |
| package body System.Traceback is |
| |
| use System.Machine_State_Operations; |
| |
| ---------------- |
| -- Call_Chain -- |
| ---------------- |
| |
| procedure Call_Chain |
| (Traceback : System.Address; |
| Max_Len : Natural; |
| Len : out Natural; |
| Exclude_Min : System.Address := System.Null_Address; |
| Exclude_Max : System.Address := System.Null_Address; |
| Skip_Frames : Natural := 1) |
| is |
| type Tracebacks_Array is array (1 .. Max_Len) of Code_Loc; |
| pragma Suppress_Initialization (Tracebacks_Array); |
| |
| M : Machine_State; |
| Code : Code_Loc; |
| |
| Trace : Tracebacks_Array; |
| for Trace'Address use Traceback; |
| |
| N_Skips : Natural := 0; |
| |
| begin |
| M := Allocate_Machine_State; |
| Set_Machine_State (M); |
| |
| -- Skip the requested number of frames |
| |
| loop |
| Code := Get_Code_Loc (M); |
| exit when Code = Null_Address or else N_Skips = Skip_Frames; |
| |
| Pop_Frame (M, System.Null_Address); |
| N_Skips := N_Skips + 1; |
| end loop; |
| |
| -- Now, record the frames outside the exclusion bounds, updating |
| -- the Len output value along the way. |
| |
| Len := 0; |
| loop |
| Code := Get_Code_Loc (M); |
| exit when Code = Null_Address or else Len = Max_Len; |
| |
| if Code < Exclude_Min or else Code > Exclude_Max then |
| Len := Len + 1; |
| Trace (Len) := Code; |
| end if; |
| |
| Pop_Frame (M, System.Null_Address); |
| end loop; |
| |
| Free_Machine_State (M); |
| end Call_Chain; |
| |
| ------------------ |
| -- C_Call_Chain -- |
| ------------------ |
| |
| function C_Call_Chain |
| (Traceback : System.Address; |
| Max_Len : Natural) return Natural |
| is |
| Val : Natural; |
| begin |
| Call_Chain (Traceback, Max_Len, Val); |
| return Val; |
| end C_Call_Chain; |
| |
| end System.Traceback; |
