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Diffstat (limited to 'gcc-4.2.1/gcc/ada/a-excach.adb')
-rw-r--r-- | gcc-4.2.1/gcc/ada/a-excach.adb | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/gcc-4.2.1/gcc/ada/a-excach.adb b/gcc-4.2.1/gcc/ada/a-excach.adb new file mode 100644 index 000000000..e10352d07 --- /dev/null +++ b/gcc-4.2.1/gcc/ada/a-excach.adb @@ -0,0 +1,76 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- A D A . E X C E P T I O N S . C A L L _ C H A I N -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1992-2005, Free Software Foundation, 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, 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. -- +-- -- +------------------------------------------------------------------------------ + +pragma Warnings (Off); +-- Allow withing of non-Preelaborated units in Ada 2005 mode where this +-- package will be categorized as Preelaborate. See AI-362 for details. +-- It is safe in the context of the run-time to violate the rules! + +with System.Traceback; + +pragma Warnings (On); + +separate (Ada.Exceptions) +procedure Call_Chain (Excep : EOA) is + + Exception_Tracebacks : Integer; + pragma Import (C, Exception_Tracebacks, "__gl_exception_tracebacks"); + -- Boolean indicating whether tracebacks should be stored in exception + -- occurrences. + +begin + if Exception_Tracebacks /= 0 and Excep.Num_Tracebacks = 0 then + + -- If Exception_Tracebacks = 0 then the program was not + -- compiled for storing tracebacks in exception occurrences + -- (-bargs -E switch) so that we do not generate them. + -- + -- If Excep.Num_Tracebacks /= 0 then this is a reraise, no need + -- to store a new (wrong) chain. + + -- We ask System.Traceback.Call_Chain to skip 3 frames to ensure that + -- itself, ourselves and our caller are not part of the result. Our + -- caller is always an exception propagation actor that we don't want + -- to see, and it may be part of a separate subunit which pulls it + -- outside the AAA/ZZZ range. + + System.Traceback.Call_Chain + (Traceback => Excep.Tracebacks'Address, + Max_Len => Max_Tracebacks, + Len => Excep.Num_Tracebacks, + Exclude_Min => Code_Address_For_AAA, + Exclude_Max => Code_Address_For_ZZZ, + Skip_Frames => 3); + end if; + +end Call_Chain; |