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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ada/] [a-exexpr.adb] - Rev 724
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------------------------------------------------------------------------------ -- -- -- 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) 1992-2011, 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"); ------------------------- -- Propagate_Exception -- ------------------------- procedure Propagate_Exception is 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 (Jumpbuf_Ptr, 1); else Exception_Traces.Notify_Unhandled_Exception; Exception_Traces.Unhandled_Exception_Terminate; end if; end Propagate_Exception; end Exception_Propagation;
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