75 lines
3.9 KiB
Ada
75 lines
3.9 KiB
Ada
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------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- A D A . E X C E P T I O N S . C A L L _ C H A I N --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2014, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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pragma Warnings (Off);
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-- Allow withing of non-Preelaborated units in Ada 2005 mode where this
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-- package will be categorized as Preelaborate. See AI-362 for details.
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-- It is safe in the context of the run-time to violate the rules.
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with System.Traceback;
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pragma Warnings (On);
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separate (Ada.Exceptions)
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procedure Call_Chain (Excep : EOA) is
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Exception_Tracebacks : Integer;
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pragma Import (C, Exception_Tracebacks, "__gl_exception_tracebacks");
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-- Boolean indicating whether tracebacks should be stored in exception
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-- occurrences.
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begin
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if Exception_Tracebacks /= 0 and Excep.Num_Tracebacks = 0 then
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-- If Exception_Tracebacks = 0 then the program was not
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-- compiled for storing tracebacks in exception occurrences
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-- (-bargs -E switch) so that we do not generate them.
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--
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-- If Excep.Num_Tracebacks /= 0 then this is a reraise, no need
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-- to store a new (wrong) chain.
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-- We ask System.Traceback.Call_Chain to skip 3 frames to ensure that
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-- itself, ourselves and our caller are not part of the result. Our
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-- caller is always an exception propagation actor that we don't want
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-- to see, and it may be part of a separate subunit which pulls it
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-- outside the AAA/ZZZ range.
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System.Traceback.Call_Chain
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(Traceback => Excep.Tracebacks,
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Max_Len => Max_Tracebacks,
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Len => Excep.Num_Tracebacks,
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Exclude_Min => Code_Address_For_AAA,
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Exclude_Max => Code_Address_For_ZZZ,
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Skip_Frames => 3);
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end if;
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end Call_Chain;
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