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diff --git a/gcc/ada/g-exctra.ads b/gcc/ada/g-exctra.ads new file mode 100644 index 00000000000..854ff9d8a60 --- /dev/null +++ b/gcc/ada/g-exctra.ads @@ -0,0 +1,94 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- G N A T . E X C E P T I O N _ T R A C E S -- +-- -- +-- S p e c -- +-- -- +-- $Revision: 1.4 $ +-- -- +-- Copyright (C) 2000 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). -- +-- -- +------------------------------------------------------------------------------ + +-- This package provides an interface allowing to control *automatic* output +-- to standard error upon exception occurrences (as opposed to explicit +-- generation of traceback information using GNAT.Traceback). +-- +-- This output includes the basic information associated with the exception +-- (name, message) as well as a backtrace of the call chain at the point +-- where the exception occured. This backtrace is only output if the call +-- chain information is available, depending if the binder switch dedicated +-- to that purpose has been used or not. +-- +-- The default backtrace is in the form of absolute code locations which may +-- be converted to corresponding source locations using the addr2line utility +-- or from within GDB. Please refer to GNAT.Traceback for information about +-- what is necessary to be able to exploit thisg possibility. +-- +-- The backtrace output can also be customized by way of a "decorator" which +-- may return any string output in association with a provided call chain. + +with GNAT.Traceback; use GNAT.Traceback; + +package GNAT.Exception_Traces is + + -- The following defines the exact situations in which raises will + -- cause automatic output of trace information. + + type Trace_Kind is + (Every_Raise, + -- Denotes the initial raise event for any exception occurrence, either + -- explicit or due to a specific language rule, within the context of a + -- task or not. + + Unhandled_Raise + -- Denotes the raise events corresponding to exceptions for which there + -- is no user defined handler, in particular, when a task dies due to an + -- unhandled exception. + ); + + -- The following procedures can be used to activate and deactivate + -- traces identified by the above trace kind values. + + procedure Trace_On (Kind : in Trace_Kind); + -- Activate the traces denoted by Kind. + + procedure Trace_Off; + -- Stop the tracing requested by the last call to Trace_On. + -- Has no effect if no such call has ever occurred. + + -- The following provide the backtrace decorating facilities + + type Traceback_Decorator is access + function (Traceback : Tracebacks_Array) return String; + -- A backtrace decorator is a function which returns the string to be + -- output for a call chain provided by way of a tracebacks array. + + procedure Set_Trace_Decorator (Decorator : Traceback_Decorator); + -- Set the decorator to be used for future automatic outputs. Restore + -- the default behavior (output of raw addresses) if the provided + -- access value is null. + +end GNAT.Exception_Traces; |