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Diffstat (limited to 'gcc-4.8.3/gcc/ada/a-exexpr.adb')
| -rw-r--r-- | gcc-4.8.3/gcc/ada/a-exexpr.adb | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/gcc-4.8.3/gcc/ada/a-exexpr.adb b/gcc-4.8.3/gcc/ada/a-exexpr.adb new file mode 100644 index 000000000..e2fd7d70e --- /dev/null +++ b/gcc-4.8.3/gcc/ada/a-exexpr.adb @@ -0,0 +1,99 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- A D A . E X C E P T I O N S . E X C E P T I O N _ P R O P A G A T I O N -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1992-2012, 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 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 is the default version, using the __builtin_setjmp/longjmp EH +-- mechanism. + +with Ada.Unchecked_Conversion; + +separate (Ada.Exceptions) +package body Exception_Propagation is + + -- Common binding to __builtin_longjmp for sjlj variants. + + procedure builtin_longjmp (buffer : System.Address; Flag : Integer); + pragma No_Return (builtin_longjmp); + pragma Import (Intrinsic, builtin_longjmp, "__builtin_longjmp"); + + procedure Propagate_Continue (E : Exception_Id); + pragma No_Return (Propagate_Continue); + pragma Export (C, Propagate_Continue, "__gnat_raise_nodefer_with_msg"); + -- A call to this procedure is inserted automatically by GIGI, in order + -- to continue the propagation when the exception was not handled. + -- The linkage name is historical. + + ------------------------- + -- Allocate_Occurrence -- + ------------------------- + + function Allocate_Occurrence return EOA is + begin + return Get_Current_Excep.all; + end Allocate_Occurrence; + + ------------------------- + -- Propagate_Exception -- + ------------------------- + + procedure Propagate_Exception (Excep : EOA) is + Jumpbuf_Ptr : constant Address := Get_Jmpbuf_Address.all; + + begin + -- If the jump buffer pointer is non-null, transfer control using + -- it. Otherwise announce an unhandled exception (note that this + -- means that we have no finalizations to do other than at the outer + -- level). Perform the necessary notification tasks in both cases. + + if Jumpbuf_Ptr /= Null_Address then + if not Excep.Exception_Raised then + Excep.Exception_Raised := True; + Exception_Traces.Notify_Handled_Exception (Excep); + end if; + + builtin_longjmp (Jumpbuf_Ptr, 1); + + else + Exception_Traces.Notify_Unhandled_Exception (Excep); + Exception_Traces.Unhandled_Exception_Terminate (Excep); + end if; + end Propagate_Exception; + + ------------------------ + -- Propagate_Continue -- + ------------------------ + + procedure Propagate_Continue (E : Exception_Id) is + pragma Unreferenced (E); + begin + Propagate_Exception (Get_Current_Excep.all); + end Propagate_Continue; + +end Exception_Propagation; |