diff options
Diffstat (limited to 'gcc/ada/s-exctra.ads')
| -rw-r--r-- | gcc/ada/s-exctra.ads | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/gcc/ada/s-exctra.ads b/gcc/ada/s-exctra.ads new file mode 100644 index 0000000..956f531 --- /dev/null +++ b/gcc/ada/s-exctra.ads @@ -0,0 +1,96 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- S Y S T E M . E X C E P T I O N _ T R A C E S -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 2000-2014, 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 3, 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. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- 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 System.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 occurred. 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 System.Traceback for information about +-- what is necessary to be able to exploit this 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. +-- The decorator replaces the default backtrace mentioned above. + +with System.Traceback_Entries; + +package System.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 : 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 : Traceback_Entries.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. + -- + -- Note: System.Traceback.Symbolic.Symbolic_Traceback may be used as the + -- Decorator, to get a symbolic traceback. This will cause a significant + -- cpu and memory overhead. + +end System.Exception_Traces; |