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Diffstat (limited to 'gcc/ada/s-traceb.ads')
| -rw-r--r-- | gcc/ada/s-traceb.ads | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/gcc/ada/s-traceb.ads b/gcc/ada/s-traceb.ads new file mode 100644 index 00000000000..13f0e88728d --- /dev/null +++ b/gcc/ada/s-traceb.ads @@ -0,0 +1,84 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S Y S T E M . T R A C E B A C K -- +-- -- +-- S p e c -- +-- -- +-- $Revision: 1.7 $ +-- -- +-- Copyright (C) 1999-2001 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. -- +-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). -- +-- -- +------------------------------------------------------------------------------ + +-- This package provides a method for generating a traceback of the +-- current execution location. The traceback shows the locations of +-- calls in the call chain, up to either the top or a designated +-- number of levels. + +pragma Polling (Off); +-- We must turn polling off for this unit, because otherwise we get +-- elaboration circularities with System.Exception_Tables. + +package System.Traceback is + + ---------------- + -- 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); + -- Store up to Max_Len code locations in Traceback, corresponding to + -- the current call chain. + -- + -- Traceback is the address of an array of addresses where the + -- result will be stored. + -- + -- Max_Len is the length of the Traceback array. If the call chain + -- is longer than this, then additional entries are discarded, and + -- the traceback is missing some of the highest level entries. + -- + -- Len is the returned actual number of addresses stored + -- in the Traceback array. + -- + -- Exclude_Min/Exclude_Max, if non null, provide a range of addresses + -- to ignore from the computation of the traceback. + -- + -- On return, the Traceback array is filled in, and Len indicates + -- the number of stored entries. The first entry is the most recent + -- call, and the last entry is the highest level call. + + function C_Call_Chain + (Traceback : System.Address; + Max_Len : Natural) + return Natural; + pragma Export (C, C_Call_Chain, "system__traceback__c_call_chain"); + -- Version that can be used directly from C. + +end System.Traceback; |