From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/ada/a-exexpr.adb | 121 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 121 insertions(+) create mode 100644 gcc/ada/a-exexpr.adb (limited to 'gcc/ada/a-exexpr.adb') diff --git a/gcc/ada/a-exexpr.adb b/gcc/ada/a-exexpr.adb new file mode 100644 index 000000000..e3ae5b01c --- /dev/null +++ b/gcc/ada/a-exexpr.adb @@ -0,0 +1,121 @@ +------------------------------------------------------------------------------ +-- -- +-- 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) 1992-2009, 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 -- +-- . -- +-- -- +-- 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 System.Storage_Elements; use System.Storage_Elements; + +pragma Warnings (Off); +-- Since several constructs give warnings in 3.14a1, including unreferenced +-- variables and pragma Unreferenced itself. + +separate (Ada.Exceptions) +package body Exception_Propagation is + + --------------------- + -- Setup_Exception -- + --------------------- + + procedure Setup_Exception + (Excep : EOA; + Current : EOA; + Reraised : Boolean := False) + is + pragma Unreferenced (Excep, Current, Reraised); + begin + -- In the GNAT-SJLJ case this "stack" only exists implicitly, by way of + -- local occurrence declarations together with save/restore operations + -- generated by the front-end, and this routine has nothing to do. + + null; + end Setup_Exception; + + ------------------------- + -- Propagate_Exception -- + ------------------------- + + procedure Propagate_Exception + (E : Exception_Id; + From_Signal_Handler : Boolean) + is + pragma Inspection_Point (E); + + Jumpbuf_Ptr : constant Address := Get_Jmpbuf_Address.all; + Excep : constant EOA := Get_Current_Excep.all; + begin + -- Compute the backtrace for this occurrence if corresponding binder + -- option has been set. Call_Chain takes care of the reraise case. + + Call_Chain (Excep); + + -- Note on above call to Call_Chain: + + -- We used to only do this if From_Signal_Handler was not set, + -- based on the assumption that backtracing from a signal handler + -- would not work due to stack layout oddities. However, since + + -- 1. The flag is never set in tasking programs (Notify_Exception + -- performs regular raise statements), and + + -- 2. No problem has shown up in tasking programs around here so + -- far, this turned out to be too strong an assumption. + + -- As, in addition, the test was + + -- 1. preventing the production of backtraces in non-tasking + -- programs, and + + -- 2. introducing a behavior inconsistency between + -- the tasking and non-tasking cases, + + -- we have simply removed it + + -- 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; + end if; + + builtin_longjmp (To_Jmpbuf_Address (Jumpbuf_Ptr), 1); + + else + Exception_Traces.Notify_Unhandled_Exception; + Exception_Traces.Unhandled_Exception_Terminate; + end if; + end Propagate_Exception; + +end Exception_Propagation; -- cgit v1.2.3