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Diffstat (limited to 'gcc-4.3.1/gcc/ada/s-traceb-mastop.adb')
| -rw-r--r-- | gcc-4.3.1/gcc/ada/s-traceb-mastop.adb | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/gcc-4.3.1/gcc/ada/s-traceb-mastop.adb b/gcc-4.3.1/gcc/ada/s-traceb-mastop.adb new file mode 100644 index 000000000..9591b2d2a --- /dev/null +++ b/gcc-4.3.1/gcc/ada/s-traceb-mastop.adb @@ -0,0 +1,112 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S Y S T E M . T R A C E B A C K -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1999-2005, AdaCore -- +-- -- +-- 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. -- +-- -- +------------------------------------------------------------------------------ + +-- This version uses System.Machine_State_Operations routines + +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); + 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); + 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; |