1270 lines
46 KiB
Ada
1270 lines
46 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- A D A . E X C E P T I O N S --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2006, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING. If not, write --
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-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
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-- Boston, MA 02110-1301, USA. --
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-- --
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-- As a special exception, if other files instantiate generics from this --
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-- unit, or you link this unit with other files to produce an executable, --
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-- this unit does not by itself cause the resulting executable to be --
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-- covered by the GNU General Public License. This exception does not --
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-- however invalidate any other reasons why the executable file might be --
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-- covered by the GNU Public License. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This version of Ada.Exceptions is a full Ada 95 version, and Ada 2005
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-- features such as the additional definitions of Exception_Name returning
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-- Wide_[Wide_]String.
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-- It is used for building the compiler and the basic tools, since these
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-- builds may be done with bootstrap compilers that cannot handle these
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-- additions. The full version of Ada.Exceptions can be found in the files
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-- a-except-2005.ads/adb, and is used for all other builds where full Ada
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-- 2005 functionality is required. in particular, it is used for building
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-- run times on all targets.
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pragma Style_Checks (All_Checks);
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-- No subprogram ordering check, due to logical grouping
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pragma Polling (Off);
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-- We must turn polling off for this unit, because otherwise we get
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-- elaboration circularities with System.Exception_Tables.
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with System; use System;
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with System.Standard_Library; use System.Standard_Library;
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with System.Soft_Links; use System.Soft_Links;
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package body Ada.Exceptions is
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pragma Suppress (All_Checks);
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-- We definitely do not want exceptions occurring within this unit, or
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-- we are in big trouble. If an exceptional situation does occur, better
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-- that it not be raised, since raising it can cause confusing chaos.
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-----------------------
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-- Local Subprograms --
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-----------------------
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-- Note: the exported subprograms in this package body are called directly
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-- from C clients using the given external name, even though they are not
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-- technically visible in the Ada sense.
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procedure Process_Raise_Exception (E : Exception_Id);
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pragma No_Return (Process_Raise_Exception);
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-- This is the lowest level raise routine. It raises the exception
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-- referenced by Current_Excep.all in the TSD, without deferring abort
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-- (the caller must ensure that abort is deferred on entry).
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procedure To_Stderr (S : String);
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pragma Export (Ada, To_Stderr, "__gnat_to_stderr");
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-- Little routine to output string to stderr that is also used
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-- in the tasking run time.
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procedure To_Stderr (C : Character);
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pragma Inline (To_Stderr);
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pragma Export (Ada, To_Stderr, "__gnat_to_stderr_char");
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-- Little routine to output a character to stderr, used by some of
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-- the separate units below.
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package Exception_Data is
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---------------------------------
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-- Exception messages routines --
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---------------------------------
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procedure Set_Exception_C_Msg
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(Id : Exception_Id;
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Msg1 : System.Address;
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Line : Integer := 0;
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Msg2 : System.Address := System.Null_Address);
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-- This routine is called to setup the exception referenced by the
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-- Current_Excep field in the TSD to contain the indicated Id value
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-- and message. Msg1 is a null terminated string which is generated
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-- as the exception message. If line is non-zero, then a colon and
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-- the decimal representation of this integer is appended to the
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-- message. When Msg2 is non-null, a space and this additional null
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-- terminated string is added to the message.
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procedure Set_Exception_Msg
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(Id : Exception_Id;
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Message : String);
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-- This routine is called to setup the exception referenced by the
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-- Current_Excep field in the TSD to contain the indicated Id value
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-- and message. Message is a string which is generated as the
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-- exception message.
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--------------------------------------
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-- Exception information subprogram --
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--------------------------------------
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function Exception_Information (X : Exception_Occurrence) return String;
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-- The format of the exception information is as follows:
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--
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-- Exception_Name: <exception name> (as in Exception_Name)
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-- Message: <message> (only if Exception_Message is empty)
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-- PID=nnnn (only if != 0)
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-- Call stack traceback locations: (only if at least one location)
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-- <0xyyyyyyyy 0xyyyyyyyy ...> (is recorded)
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--
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-- The lines are separated by a ASCII.LF character.
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-- The nnnn is the partition Id given as decimal digits.
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-- The 0x... line represents traceback program counter locations, in
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-- execution order with the first one being the exception location. It
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-- is present only
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--
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-- The Exception_Name and Message lines are omitted in the abort
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-- signal case, since this is not really an exception.
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-- !! If the format of the generated string is changed, please note
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-- !! that an equivalent modification to the routine String_To_EO must
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-- !! be made to preserve proper functioning of the stream attributes.
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---------------------------------------
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-- Exception backtracing subprograms --
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---------------------------------------
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-- What is automatically output when exception tracing is on is the
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-- usual exception information with the call chain backtrace possibly
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-- tailored by a backtrace decorator. Modifying Exception_Information
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-- itself is not a good idea because the decorated output is completely
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-- out of control and would break all our code related to the streaming
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-- of exceptions. We then provide an alternative function to compute
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-- the possibly tailored output, which is equivalent if no decorator is
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-- currently set:
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function Tailored_Exception_Information
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(X : Exception_Occurrence) return String;
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-- Exception information to be output in the case of automatic tracing
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-- requested through GNAT.Exception_Traces.
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--
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-- This is the same as Exception_Information if no backtrace decorator
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-- is currently in place. Otherwise, this is Exception_Information with
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-- the call chain raw addresses replaced by the result of a call to the
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-- current decorator provided with the call chain addresses.
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pragma Export
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(Ada, Tailored_Exception_Information,
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"__gnat_tailored_exception_information");
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-- This is currently used by System.Tasking.Stages
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end Exception_Data;
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package Exception_Traces is
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use Exception_Data;
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-- Imports Tailored_Exception_Information
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----------------------------------------------
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-- Run-Time Exception Notification Routines --
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----------------------------------------------
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-- These subprograms provide a common run-time interface to trigger the
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-- actions required when an exception is about to be propagated (e.g.
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-- user specified actions or output of exception information). They are
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-- exported to be usable by the Ada exception handling personality
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-- routine when the GCC 3 mechanism is used.
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procedure Notify_Handled_Exception;
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pragma Export
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(C, Notify_Handled_Exception, "__gnat_notify_handled_exception");
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-- This routine is called for a handled occurrence is about to be
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-- propagated.
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procedure Notify_Unhandled_Exception;
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pragma Export
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(C, Notify_Unhandled_Exception, "__gnat_notify_unhandled_exception");
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-- This routine is called when an unhandled occurrence is about to be
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-- propagated.
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procedure Unhandled_Exception_Terminate;
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pragma No_Return (Unhandled_Exception_Terminate);
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-- This procedure is called to terminate execution following an
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-- unhandled exception. The exception information, including
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-- traceback if available is output, and execution is then
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-- terminated. Note that at the point where this routine is
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-- called, the stack has typically been destroyed.
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end Exception_Traces;
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package Exception_Propagation is
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procedure Setup_Exception
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(Excep : EOA;
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Current : EOA;
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Reraised : Boolean := False);
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-- Dummy routine used to share a-exexda.adb, do nothing
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end Exception_Propagation;
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package Stream_Attributes is
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--------------------------------
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-- Stream attributes routines --
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--------------------------------
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function EId_To_String (X : Exception_Id) return String;
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function String_To_EId (S : String) return Exception_Id;
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-- Functions for implementing Exception_Id stream attributes
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function EO_To_String (X : Exception_Occurrence) return String;
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function String_To_EO (S : String) return Exception_Occurrence;
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-- Functions for implementing Exception_Occurrence stream
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-- attributes
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end Stream_Attributes;
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procedure Raise_Current_Excep (E : Exception_Id);
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pragma No_Return (Raise_Current_Excep);
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pragma Export (C, Raise_Current_Excep, "__gnat_raise_nodefer_with_msg");
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-- This is a simple wrapper to Process_Raise_Exception.
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--
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-- This external name for Raise_Current_Excep is historical, and probably
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-- should be changed but for now we keep it, because gdb and gigi know
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-- about it.
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procedure Raise_Exception_No_Defer
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(E : Exception_Id; Message : String := "");
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pragma Export
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(Ada, Raise_Exception_No_Defer,
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"ada__exceptions__raise_exception_no_defer");
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pragma No_Return (Raise_Exception_No_Defer);
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-- Similar to Raise_Exception, but with no abort deferral
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procedure Raise_With_Msg (E : Exception_Id);
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pragma No_Return (Raise_With_Msg);
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pragma Export (C, Raise_With_Msg, "__gnat_raise_with_msg");
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-- Raises an exception with given exception id value. A message
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-- is associated with the raise, and has already been stored in the
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-- exception occurrence referenced by the Current_Excep in the TSD.
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-- Abort is deferred before the raise call.
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procedure Raise_With_Location_And_Msg
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(E : Exception_Id;
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F : System.Address;
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L : Integer;
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M : System.Address := System.Null_Address);
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pragma No_Return (Raise_With_Location_And_Msg);
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-- Raise an exception with given exception id value. A filename and line
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-- number is associated with the raise and is stored in the exception
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-- occurrence and in addition a string message M is appended to
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-- this (if M is not null).
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procedure Raise_Constraint_Error
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(File : System.Address;
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Line : Integer);
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pragma No_Return (Raise_Constraint_Error);
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pragma Export
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(C, Raise_Constraint_Error, "__gnat_raise_constraint_error");
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-- Raise constraint error with file:line information
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procedure Raise_Constraint_Error_Msg
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(File : System.Address;
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Line : Integer;
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Msg : System.Address);
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pragma No_Return (Raise_Constraint_Error_Msg);
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pragma Export
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(C, Raise_Constraint_Error_Msg, "__gnat_raise_constraint_error_msg");
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-- Raise constraint error with file:line + msg information
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procedure Raise_Program_Error
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(File : System.Address;
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Line : Integer);
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pragma No_Return (Raise_Program_Error);
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pragma Export
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(C, Raise_Program_Error, "__gnat_raise_program_error");
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-- Raise program error with file:line information
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procedure Raise_Program_Error_Msg
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(File : System.Address;
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Line : Integer;
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Msg : System.Address);
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pragma No_Return (Raise_Program_Error_Msg);
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pragma Export
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(C, Raise_Program_Error_Msg, "__gnat_raise_program_error_msg");
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-- Raise program error with file:line + msg information
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procedure Raise_Storage_Error
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(File : System.Address;
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Line : Integer);
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pragma No_Return (Raise_Storage_Error);
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pragma Export
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(C, Raise_Storage_Error, "__gnat_raise_storage_error");
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-- Raise storage error with file:line information
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procedure Raise_Storage_Error_Msg
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(File : System.Address;
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Line : Integer;
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Msg : System.Address);
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pragma No_Return (Raise_Storage_Error_Msg);
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pragma Export
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(C, Raise_Storage_Error_Msg, "__gnat_raise_storage_error_msg");
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-- Raise storage error with file:line + reason msg information
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-- The exception raising process and the automatic tracing mechanism rely
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-- on some careful use of flags attached to the exception occurrence. The
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-- graph below illustrates the relations between the Raise_ subprograms
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-- and identifies the points where basic flags such as Exception_Raised
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-- are initialized.
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--
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-- (i) signs indicate the flags initialization points. R stands for Raise,
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-- W for With, and E for Exception.
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--
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-- R_No_Msg R_E R_Pe R_Ce R_Se
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-- | | | | |
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-- +--+ +--+ +---+ | +---+
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-- | | | | |
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-- R_E_No_Defer(i) R_W_Msg(i) R_W_Loc
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-- | | | |
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-- +------------+ | +-----------+ +--+
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-- | | | |
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-- | | | Set_E_C_Msg(i)
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-- | | |
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-- Raise_Current_Excep
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procedure Reraise;
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pragma No_Return (Reraise);
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pragma Export (C, Reraise, "__gnat_reraise");
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-- Reraises the exception referenced by the Current_Excep field of
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-- the TSD (all fields of this exception occurrence are set). Abort
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-- is deferred before the reraise operation.
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-- Save_Occurrence variations: As the management of the private data
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-- attached to occurrences is delicate, wether or not pointers to such
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-- data has to be copied in various situations is better made explicit.
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-- The following procedures provide an internal interface to help making
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-- this explicit.
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procedure Save_Occurrence_No_Private
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(Target : out Exception_Occurrence;
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Source : Exception_Occurrence);
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-- Copy all the components of Source to Target, except the
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-- Private_Data pointer.
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procedure Transfer_Occurrence
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(Target : Exception_Occurrence_Access;
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Source : Exception_Occurrence);
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pragma Export (C, Transfer_Occurrence, "__gnat_transfer_occurrence");
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-- Called from System.Tasking.RendezVous.Exceptional_Complete_RendezVous
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-- to setup Target from Source as an exception to be propagated in the
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-- caller task. Target is expected to be a pointer to the fixed TSD
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-- occurrence for this task.
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-----------------------------
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-- Run-Time Check Routines --
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-----------------------------
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-- These routines are called from the runtime to raise a specific
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-- exception with a reason message attached. The parameters are
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-- the file name and line number in each case. The names are keyed
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-- to the codes defined in Types.ads and a-types.h (for example,
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-- the name Rcheck_05 refers to the Reason whose Pos code is 5).
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procedure Rcheck_00 (File : System.Address; Line : Integer);
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procedure Rcheck_01 (File : System.Address; Line : Integer);
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procedure Rcheck_02 (File : System.Address; Line : Integer);
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procedure Rcheck_03 (File : System.Address; Line : Integer);
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procedure Rcheck_04 (File : System.Address; Line : Integer);
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procedure Rcheck_05 (File : System.Address; Line : Integer);
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procedure Rcheck_06 (File : System.Address; Line : Integer);
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procedure Rcheck_07 (File : System.Address; Line : Integer);
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procedure Rcheck_08 (File : System.Address; Line : Integer);
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procedure Rcheck_09 (File : System.Address; Line : Integer);
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procedure Rcheck_10 (File : System.Address; Line : Integer);
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procedure Rcheck_11 (File : System.Address; Line : Integer);
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procedure Rcheck_12 (File : System.Address; Line : Integer);
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procedure Rcheck_13 (File : System.Address; Line : Integer);
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procedure Rcheck_14 (File : System.Address; Line : Integer);
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procedure Rcheck_15 (File : System.Address; Line : Integer);
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procedure Rcheck_16 (File : System.Address; Line : Integer);
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procedure Rcheck_17 (File : System.Address; Line : Integer);
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procedure Rcheck_18 (File : System.Address; Line : Integer);
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procedure Rcheck_19 (File : System.Address; Line : Integer);
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procedure Rcheck_20 (File : System.Address; Line : Integer);
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procedure Rcheck_21 (File : System.Address; Line : Integer);
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procedure Rcheck_22 (File : System.Address; Line : Integer);
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procedure Rcheck_23 (File : System.Address; Line : Integer);
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procedure Rcheck_24 (File : System.Address; Line : Integer);
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procedure Rcheck_25 (File : System.Address; Line : Integer);
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procedure Rcheck_26 (File : System.Address; Line : Integer);
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procedure Rcheck_27 (File : System.Address; Line : Integer);
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procedure Rcheck_28 (File : System.Address; Line : Integer);
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procedure Rcheck_29 (File : System.Address; Line : Integer);
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procedure Rcheck_30 (File : System.Address; Line : Integer);
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procedure Rcheck_31 (File : System.Address; Line : Integer);
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procedure Rcheck_32 (File : System.Address; Line : Integer);
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pragma Export (C, Rcheck_00, "__gnat_rcheck_00");
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pragma Export (C, Rcheck_01, "__gnat_rcheck_01");
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pragma Export (C, Rcheck_02, "__gnat_rcheck_02");
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pragma Export (C, Rcheck_03, "__gnat_rcheck_03");
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pragma Export (C, Rcheck_04, "__gnat_rcheck_04");
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pragma Export (C, Rcheck_05, "__gnat_rcheck_05");
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pragma Export (C, Rcheck_06, "__gnat_rcheck_06");
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pragma Export (C, Rcheck_07, "__gnat_rcheck_07");
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pragma Export (C, Rcheck_08, "__gnat_rcheck_08");
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pragma Export (C, Rcheck_09, "__gnat_rcheck_09");
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pragma Export (C, Rcheck_10, "__gnat_rcheck_10");
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pragma Export (C, Rcheck_11, "__gnat_rcheck_11");
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pragma Export (C, Rcheck_12, "__gnat_rcheck_12");
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pragma Export (C, Rcheck_13, "__gnat_rcheck_13");
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pragma Export (C, Rcheck_14, "__gnat_rcheck_14");
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pragma Export (C, Rcheck_15, "__gnat_rcheck_15");
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pragma Export (C, Rcheck_16, "__gnat_rcheck_16");
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pragma Export (C, Rcheck_17, "__gnat_rcheck_17");
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pragma Export (C, Rcheck_18, "__gnat_rcheck_18");
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pragma Export (C, Rcheck_19, "__gnat_rcheck_19");
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pragma Export (C, Rcheck_20, "__gnat_rcheck_20");
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pragma Export (C, Rcheck_21, "__gnat_rcheck_21");
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pragma Export (C, Rcheck_22, "__gnat_rcheck_22");
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pragma Export (C, Rcheck_23, "__gnat_rcheck_23");
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pragma Export (C, Rcheck_24, "__gnat_rcheck_24");
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pragma Export (C, Rcheck_25, "__gnat_rcheck_25");
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pragma Export (C, Rcheck_26, "__gnat_rcheck_26");
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pragma Export (C, Rcheck_27, "__gnat_rcheck_27");
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pragma Export (C, Rcheck_28, "__gnat_rcheck_28");
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pragma Export (C, Rcheck_29, "__gnat_rcheck_29");
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pragma Export (C, Rcheck_30, "__gnat_rcheck_30");
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pragma Export (C, Rcheck_31, "__gnat_rcheck_31");
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pragma Export (C, Rcheck_32, "__gnat_rcheck_32");
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-- None of these procedures ever returns (they raise an exception!). By
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-- using pragma No_Return, we ensure that any junk code after the call,
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-- such as normal return epilog stuff, can be eliminated).
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pragma No_Return (Rcheck_00);
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pragma No_Return (Rcheck_01);
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|
pragma No_Return (Rcheck_02);
|
|
pragma No_Return (Rcheck_03);
|
|
pragma No_Return (Rcheck_04);
|
|
pragma No_Return (Rcheck_05);
|
|
pragma No_Return (Rcheck_06);
|
|
pragma No_Return (Rcheck_07);
|
|
pragma No_Return (Rcheck_08);
|
|
pragma No_Return (Rcheck_09);
|
|
pragma No_Return (Rcheck_10);
|
|
pragma No_Return (Rcheck_11);
|
|
pragma No_Return (Rcheck_12);
|
|
pragma No_Return (Rcheck_13);
|
|
pragma No_Return (Rcheck_14);
|
|
pragma No_Return (Rcheck_15);
|
|
pragma No_Return (Rcheck_16);
|
|
pragma No_Return (Rcheck_17);
|
|
pragma No_Return (Rcheck_18);
|
|
pragma No_Return (Rcheck_19);
|
|
pragma No_Return (Rcheck_20);
|
|
pragma No_Return (Rcheck_21);
|
|
pragma No_Return (Rcheck_22);
|
|
pragma No_Return (Rcheck_23);
|
|
pragma No_Return (Rcheck_24);
|
|
pragma No_Return (Rcheck_25);
|
|
pragma No_Return (Rcheck_26);
|
|
pragma No_Return (Rcheck_27);
|
|
pragma No_Return (Rcheck_28);
|
|
pragma No_Return (Rcheck_29);
|
|
pragma No_Return (Rcheck_30);
|
|
pragma No_Return (Rcheck_32);
|
|
|
|
---------------------------------------------
|
|
-- Reason Strings for Run-Time Check Calls --
|
|
---------------------------------------------
|
|
|
|
-- These strings are null-terminated and are used by Rcheck_nn. The
|
|
-- strings correspond to the definitions for Types.RT_Exception_Code.
|
|
|
|
use ASCII;
|
|
|
|
Rmsg_00 : constant String := "access check failed" & NUL;
|
|
Rmsg_01 : constant String := "access parameter is null" & NUL;
|
|
Rmsg_02 : constant String := "discriminant check failed" & NUL;
|
|
Rmsg_03 : constant String := "divide by zero" & NUL;
|
|
Rmsg_04 : constant String := "explicit raise" & NUL;
|
|
Rmsg_05 : constant String := "index check failed" & NUL;
|
|
Rmsg_06 : constant String := "invalid data" & NUL;
|
|
Rmsg_07 : constant String := "length check failed" & NUL;
|
|
Rmsg_08 : constant String := "null Exception_Id" & NUL;
|
|
Rmsg_09 : constant String := "null-exclusion check failed" & NUL;
|
|
Rmsg_10 : constant String := "overflow check failed" & NUL;
|
|
Rmsg_11 : constant String := "partition check failed" & NUL;
|
|
Rmsg_12 : constant String := "range check failed" & NUL;
|
|
Rmsg_13 : constant String := "tag check failed" & NUL;
|
|
Rmsg_14 : constant String := "access before elaboration" & NUL;
|
|
Rmsg_15 : constant String := "accessibility check failed" & NUL;
|
|
Rmsg_16 : constant String := "all guards closed" & NUL;
|
|
Rmsg_17 : constant String := "Current_Task referenced in entry" &
|
|
" body" & NUL;
|
|
Rmsg_18 : constant String := "duplicated entry address" & NUL;
|
|
Rmsg_19 : constant String := "explicit raise" & NUL;
|
|
Rmsg_20 : constant String := "finalize/adjust raised exception" & NUL;
|
|
Rmsg_21 : constant String := "implicit return with No_Return" & NUL;
|
|
Rmsg_22 : constant String := "misaligned address value" & NUL;
|
|
Rmsg_23 : constant String := "missing return" & NUL;
|
|
Rmsg_24 : constant String := "overlaid controlled object" & NUL;
|
|
Rmsg_25 : constant String := "potentially blocking operation" & NUL;
|
|
Rmsg_26 : constant String := "stubbed subprogram called" & NUL;
|
|
Rmsg_27 : constant String := "unchecked union restriction" & NUL;
|
|
Rmsg_28 : constant String := "illegal use of remote access-to-" &
|
|
"class-wide type, see RM E.4(18)" & NUL;
|
|
Rmsg_29 : constant String := "empty storage pool" & NUL;
|
|
Rmsg_30 : constant String := "explicit raise" & NUL;
|
|
Rmsg_31 : constant String := "infinite recursion" & NUL;
|
|
Rmsg_32 : constant String := "object too large" & NUL;
|
|
|
|
-----------------------
|
|
-- Polling Interface --
|
|
-----------------------
|
|
|
|
type Unsigned is mod 2 ** 32;
|
|
|
|
Counter : Unsigned := 0;
|
|
pragma Warnings (Off, Counter);
|
|
-- This counter is provided for convenience. It can be used in Poll to
|
|
-- perform periodic but not systematic operations.
|
|
|
|
procedure Poll is separate;
|
|
-- The actual polling routine is separate, so that it can easily
|
|
-- be replaced with a target dependent version.
|
|
|
|
------------------------------
|
|
-- Current_Target_Exception --
|
|
------------------------------
|
|
|
|
function Current_Target_Exception return Exception_Occurrence is
|
|
begin
|
|
return Null_Occurrence;
|
|
end Current_Target_Exception;
|
|
|
|
-------------------
|
|
-- EId_To_String --
|
|
-------------------
|
|
|
|
function EId_To_String (X : Exception_Id) return String
|
|
renames Stream_Attributes.EId_To_String;
|
|
|
|
------------------
|
|
-- EO_To_String --
|
|
------------------
|
|
|
|
-- We use the null string to represent the null occurrence, otherwise
|
|
-- we output the Exception_Information string for the occurrence.
|
|
|
|
function EO_To_String (X : Exception_Occurrence) return String
|
|
renames Stream_Attributes.EO_To_String;
|
|
|
|
------------------------
|
|
-- Exception_Identity --
|
|
------------------------
|
|
|
|
function Exception_Identity
|
|
(X : Exception_Occurrence) return Exception_Id
|
|
is
|
|
begin
|
|
-- Note that the following test used to be here for the original
|
|
-- Ada 95 semantics, but these were modified by AI-241 to require
|
|
-- returning Null_Id instead of raising Constraint_Error.
|
|
|
|
-- if X.Id = Null_Id then
|
|
-- raise Constraint_Error;
|
|
-- end if;
|
|
|
|
return X.Id;
|
|
end Exception_Identity;
|
|
|
|
---------------------------
|
|
-- Exception_Information --
|
|
---------------------------
|
|
|
|
function Exception_Information (X : Exception_Occurrence) return String is
|
|
begin
|
|
if X.Id = Null_Id then
|
|
raise Constraint_Error;
|
|
end if;
|
|
|
|
return Exception_Data.Exception_Information (X);
|
|
end Exception_Information;
|
|
|
|
-----------------------
|
|
-- Exception_Message --
|
|
-----------------------
|
|
|
|
function Exception_Message (X : Exception_Occurrence) return String is
|
|
begin
|
|
if X.Id = Null_Id then
|
|
raise Constraint_Error;
|
|
end if;
|
|
|
|
return X.Msg (1 .. X.Msg_Length);
|
|
end Exception_Message;
|
|
|
|
--------------------
|
|
-- Exception_Name --
|
|
--------------------
|
|
|
|
function Exception_Name (Id : Exception_Id) return String is
|
|
begin
|
|
if Id = null then
|
|
raise Constraint_Error;
|
|
end if;
|
|
|
|
return To_Ptr (Id.Full_Name) (1 .. Id.Name_Length - 1);
|
|
end Exception_Name;
|
|
|
|
function Exception_Name (X : Exception_Occurrence) return String is
|
|
begin
|
|
return Exception_Name (X.Id);
|
|
end Exception_Name;
|
|
|
|
---------------------------
|
|
-- Exception_Name_Simple --
|
|
---------------------------
|
|
|
|
function Exception_Name_Simple (X : Exception_Occurrence) return String is
|
|
Name : constant String := Exception_Name (X);
|
|
P : Natural;
|
|
|
|
begin
|
|
P := Name'Length;
|
|
while P > 1 loop
|
|
exit when Name (P - 1) = '.';
|
|
P := P - 1;
|
|
end loop;
|
|
|
|
-- Return result making sure lower bound is 1
|
|
|
|
declare
|
|
subtype Rname is String (1 .. Name'Length - P + 1);
|
|
begin
|
|
return Rname (Name (P .. Name'Length));
|
|
end;
|
|
end Exception_Name_Simple;
|
|
|
|
--------------------
|
|
-- Exception_Data --
|
|
--------------------
|
|
|
|
package body Exception_Data is separate;
|
|
-- This package can be easily dummied out if we do not want the
|
|
-- basic support for exception messages (such as in Ada 83).
|
|
|
|
package body Exception_Propagation is
|
|
|
|
procedure Setup_Exception
|
|
(Excep : EOA;
|
|
Current : EOA;
|
|
Reraised : Boolean := False)
|
|
is
|
|
pragma Warnings (Off, Excep);
|
|
pragma Warnings (Off, Current);
|
|
pragma Warnings (Off, Reraised);
|
|
begin
|
|
null;
|
|
end Setup_Exception;
|
|
|
|
end Exception_Propagation;
|
|
|
|
----------------------
|
|
-- Exception_Traces --
|
|
----------------------
|
|
|
|
package body Exception_Traces is separate;
|
|
-- Depending on the underlying support for IO the implementation
|
|
-- will differ. Moreover we would like to dummy out this package
|
|
-- in case we do not want any exception tracing support. This is
|
|
-- why this package is separated.
|
|
|
|
-----------------
|
|
-- Local_Raise --
|
|
-----------------
|
|
|
|
procedure Local_Raise (Excep : Exception_Id) is
|
|
pragma Warnings (Off, Excep);
|
|
begin
|
|
return;
|
|
end Local_Raise;
|
|
|
|
-----------------------
|
|
-- Stream Attributes --
|
|
-----------------------
|
|
|
|
package body Stream_Attributes is separate;
|
|
-- This package can be easily dummied out if we do not want the
|
|
-- support for streaming Exception_Ids and Exception_Occurrences.
|
|
|
|
-----------------------------
|
|
-- Process_Raise_Exception --
|
|
-----------------------------
|
|
|
|
procedure Process_Raise_Exception (E : Exception_Id) is
|
|
pragma Inspection_Point (E);
|
|
-- This is so the debugger can reliably inspect the parameter
|
|
|
|
Jumpbuf_Ptr : constant Address := Get_Jmpbuf_Address.all;
|
|
Excep : constant EOA := Get_Current_Excep.all;
|
|
|
|
procedure builtin_longjmp (buffer : Address; Flag : Integer);
|
|
pragma No_Return (builtin_longjmp);
|
|
pragma Import (C, builtin_longjmp, "_gnat_builtin_longjmp");
|
|
|
|
begin
|
|
-- WARNING: There should be no exception handler for this body
|
|
-- because this would cause gigi to prepend a setup for a new
|
|
-- jmpbuf to the sequence of statements in case of built-in sjljl.
|
|
-- We would then always get this new buf in Jumpbuf_Ptr instead of the
|
|
-- one for the exception we are handling, which would completely break
|
|
-- the whole design of this procedure.
|
|
|
|
-- 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 Process_Raise_Exception;
|
|
|
|
----------------------------
|
|
-- Raise_Constraint_Error --
|
|
----------------------------
|
|
|
|
procedure Raise_Constraint_Error
|
|
(File : System.Address;
|
|
Line : Integer)
|
|
is
|
|
begin
|
|
Raise_With_Location_And_Msg
|
|
(Constraint_Error_Def'Access, File, Line);
|
|
end Raise_Constraint_Error;
|
|
|
|
--------------------------------
|
|
-- Raise_Constraint_Error_Msg --
|
|
--------------------------------
|
|
|
|
procedure Raise_Constraint_Error_Msg
|
|
(File : System.Address;
|
|
Line : Integer;
|
|
Msg : System.Address)
|
|
is
|
|
begin
|
|
Raise_With_Location_And_Msg
|
|
(Constraint_Error_Def'Access, File, Line, Msg);
|
|
end Raise_Constraint_Error_Msg;
|
|
|
|
-------------------------
|
|
-- Raise_Current_Excep --
|
|
-------------------------
|
|
|
|
procedure Raise_Current_Excep (E : Exception_Id) is
|
|
|
|
pragma Inspection_Point (E);
|
|
-- This is so the debugger can reliably inspect the parameter when
|
|
-- inserting a breakpoint at the start of this procedure.
|
|
|
|
Id : Exception_Id := E;
|
|
pragma Volatile (Id);
|
|
pragma Warnings (Off, Id);
|
|
-- In order to provide support for breakpoints on unhandled exceptions,
|
|
-- the debugger will also need to be able to inspect the value of E from
|
|
-- another (inner) frame. So we need to make sure that if E is passed in
|
|
-- a register, its value is also spilled on stack. For this, we store
|
|
-- the parameter value in a local variable, and add a pragma Volatile to
|
|
-- make sure it is spilled. The pragma Warnings (Off) is needed because
|
|
-- the compiler knows that Id is not referenced and that this use of
|
|
-- pragma Volatile is peculiar!
|
|
|
|
begin
|
|
Process_Raise_Exception (E);
|
|
end Raise_Current_Excep;
|
|
|
|
---------------------
|
|
-- Raise_Exception --
|
|
---------------------
|
|
|
|
procedure Raise_Exception
|
|
(E : Exception_Id;
|
|
Message : String := "")
|
|
is
|
|
begin
|
|
if E /= null then
|
|
Exception_Data.Set_Exception_Msg (E, Message);
|
|
Abort_Defer.all;
|
|
Raise_Current_Excep (E);
|
|
end if;
|
|
|
|
-- Note: if E is null then just return (Ada 95 semantics)
|
|
|
|
return;
|
|
end Raise_Exception;
|
|
|
|
----------------------------
|
|
-- Raise_Exception_Always --
|
|
----------------------------
|
|
|
|
procedure Raise_Exception_Always
|
|
(E : Exception_Id;
|
|
Message : String := "")
|
|
is
|
|
begin
|
|
Exception_Data.Set_Exception_Msg (E, Message);
|
|
Abort_Defer.all;
|
|
Raise_Current_Excep (E);
|
|
end Raise_Exception_Always;
|
|
|
|
-------------------------------
|
|
-- Raise_From_Signal_Handler --
|
|
-------------------------------
|
|
|
|
procedure Raise_From_Signal_Handler
|
|
(E : Exception_Id;
|
|
M : System.Address)
|
|
is
|
|
begin
|
|
Exception_Data.Set_Exception_C_Msg (E, M);
|
|
Abort_Defer.all;
|
|
Process_Raise_Exception (E);
|
|
end Raise_From_Signal_Handler;
|
|
|
|
-------------------------
|
|
-- Raise_Program_Error --
|
|
-------------------------
|
|
|
|
procedure Raise_Program_Error
|
|
(File : System.Address;
|
|
Line : Integer)
|
|
is
|
|
begin
|
|
Raise_With_Location_And_Msg
|
|
(Program_Error_Def'Access, File, Line);
|
|
end Raise_Program_Error;
|
|
|
|
-----------------------------
|
|
-- Raise_Program_Error_Msg --
|
|
-----------------------------
|
|
|
|
procedure Raise_Program_Error_Msg
|
|
(File : System.Address;
|
|
Line : Integer;
|
|
Msg : System.Address)
|
|
is
|
|
begin
|
|
Raise_With_Location_And_Msg
|
|
(Program_Error_Def'Access, File, Line, Msg);
|
|
end Raise_Program_Error_Msg;
|
|
|
|
-------------------------
|
|
-- Raise_Storage_Error --
|
|
-------------------------
|
|
|
|
procedure Raise_Storage_Error
|
|
(File : System.Address;
|
|
Line : Integer)
|
|
is
|
|
begin
|
|
Raise_With_Location_And_Msg
|
|
(Storage_Error_Def'Access, File, Line);
|
|
end Raise_Storage_Error;
|
|
|
|
-----------------------------
|
|
-- Raise_Storage_Error_Msg --
|
|
-----------------------------
|
|
|
|
procedure Raise_Storage_Error_Msg
|
|
(File : System.Address;
|
|
Line : Integer;
|
|
Msg : System.Address)
|
|
is
|
|
begin
|
|
Raise_With_Location_And_Msg
|
|
(Storage_Error_Def'Access, File, Line, Msg);
|
|
end Raise_Storage_Error_Msg;
|
|
|
|
---------------------------------
|
|
-- Raise_With_Location_And_Msg --
|
|
---------------------------------
|
|
|
|
procedure Raise_With_Location_And_Msg
|
|
(E : Exception_Id;
|
|
F : System.Address;
|
|
L : Integer;
|
|
M : System.Address := System.Null_Address)
|
|
is
|
|
begin
|
|
Exception_Data.Set_Exception_C_Msg (E, F, L, M);
|
|
Abort_Defer.all;
|
|
Raise_Current_Excep (E);
|
|
end Raise_With_Location_And_Msg;
|
|
|
|
--------------------
|
|
-- Raise_With_Msg --
|
|
--------------------
|
|
|
|
procedure Raise_With_Msg (E : Exception_Id) is
|
|
Excep : constant EOA := Get_Current_Excep.all;
|
|
|
|
begin
|
|
Excep.Exception_Raised := False;
|
|
Excep.Id := E;
|
|
Excep.Num_Tracebacks := 0;
|
|
Excep.Cleanup_Flag := False;
|
|
Excep.Pid := Local_Partition_ID;
|
|
Abort_Defer.all;
|
|
Raise_Current_Excep (E);
|
|
end Raise_With_Msg;
|
|
|
|
--------------------------------------
|
|
-- Calls to Run-Time Check Routines --
|
|
--------------------------------------
|
|
|
|
procedure Rcheck_00 (File : System.Address; Line : Integer) is
|
|
begin
|
|
Raise_Constraint_Error_Msg (File, Line, Rmsg_00'Address);
|
|
end Rcheck_00;
|
|
|
|
procedure Rcheck_01 (File : System.Address; Line : Integer) is
|
|
begin
|
|
Raise_Constraint_Error_Msg (File, Line, Rmsg_01'Address);
|
|
end Rcheck_01;
|
|
|
|
procedure Rcheck_02 (File : System.Address; Line : Integer) is
|
|
begin
|
|
Raise_Constraint_Error_Msg (File, Line, Rmsg_02'Address);
|
|
end Rcheck_02;
|
|
|
|
procedure Rcheck_03 (File : System.Address; Line : Integer) is
|
|
begin
|
|
Raise_Constraint_Error_Msg (File, Line, Rmsg_03'Address);
|
|
end Rcheck_03;
|
|
|
|
procedure Rcheck_04 (File : System.Address; Line : Integer) is
|
|
begin
|
|
Raise_Constraint_Error_Msg (File, Line, Rmsg_04'Address);
|
|
end Rcheck_04;
|
|
|
|
procedure Rcheck_05 (File : System.Address; Line : Integer) is
|
|
begin
|
|
Raise_Constraint_Error_Msg (File, Line, Rmsg_05'Address);
|
|
end Rcheck_05;
|
|
|
|
procedure Rcheck_06 (File : System.Address; Line : Integer) is
|
|
begin
|
|
Raise_Constraint_Error_Msg (File, Line, Rmsg_06'Address);
|
|
end Rcheck_06;
|
|
|
|
procedure Rcheck_07 (File : System.Address; Line : Integer) is
|
|
begin
|
|
Raise_Constraint_Error_Msg (File, Line, Rmsg_07'Address);
|
|
end Rcheck_07;
|
|
|
|
procedure Rcheck_08 (File : System.Address; Line : Integer) is
|
|
begin
|
|
Raise_Constraint_Error_Msg (File, Line, Rmsg_08'Address);
|
|
end Rcheck_08;
|
|
|
|
procedure Rcheck_09 (File : System.Address; Line : Integer) is
|
|
begin
|
|
Raise_Constraint_Error_Msg (File, Line, Rmsg_09'Address);
|
|
end Rcheck_09;
|
|
|
|
procedure Rcheck_10 (File : System.Address; Line : Integer) is
|
|
begin
|
|
Raise_Constraint_Error_Msg (File, Line, Rmsg_10'Address);
|
|
end Rcheck_10;
|
|
|
|
procedure Rcheck_11 (File : System.Address; Line : Integer) is
|
|
begin
|
|
Raise_Constraint_Error_Msg (File, Line, Rmsg_11'Address);
|
|
end Rcheck_11;
|
|
|
|
procedure Rcheck_12 (File : System.Address; Line : Integer) is
|
|
begin
|
|
Raise_Constraint_Error_Msg (File, Line, Rmsg_12'Address);
|
|
end Rcheck_12;
|
|
|
|
procedure Rcheck_13 (File : System.Address; Line : Integer) is
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begin
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Raise_Constraint_Error_Msg (File, Line, Rmsg_13'Address);
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end Rcheck_13;
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procedure Rcheck_14 (File : System.Address; Line : Integer) is
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begin
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Raise_Program_Error_Msg (File, Line, Rmsg_14'Address);
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end Rcheck_14;
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procedure Rcheck_15 (File : System.Address; Line : Integer) is
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begin
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Raise_Program_Error_Msg (File, Line, Rmsg_15'Address);
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end Rcheck_15;
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procedure Rcheck_16 (File : System.Address; Line : Integer) is
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begin
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Raise_Program_Error_Msg (File, Line, Rmsg_16'Address);
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end Rcheck_16;
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procedure Rcheck_17 (File : System.Address; Line : Integer) is
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begin
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Raise_Program_Error_Msg (File, Line, Rmsg_17'Address);
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end Rcheck_17;
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procedure Rcheck_18 (File : System.Address; Line : Integer) is
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begin
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Raise_Program_Error_Msg (File, Line, Rmsg_18'Address);
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end Rcheck_18;
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procedure Rcheck_19 (File : System.Address; Line : Integer) is
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begin
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Raise_Program_Error_Msg (File, Line, Rmsg_19'Address);
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end Rcheck_19;
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procedure Rcheck_20 (File : System.Address; Line : Integer) is
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begin
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Raise_Program_Error_Msg (File, Line, Rmsg_20'Address);
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end Rcheck_20;
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procedure Rcheck_21 (File : System.Address; Line : Integer) is
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begin
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Raise_Program_Error_Msg (File, Line, Rmsg_21'Address);
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end Rcheck_21;
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|
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procedure Rcheck_22 (File : System.Address; Line : Integer) is
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begin
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Raise_Program_Error_Msg (File, Line, Rmsg_22'Address);
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end Rcheck_22;
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|
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procedure Rcheck_23 (File : System.Address; Line : Integer) is
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begin
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Raise_Program_Error_Msg (File, Line, Rmsg_23'Address);
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end Rcheck_23;
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|
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procedure Rcheck_24 (File : System.Address; Line : Integer) is
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|
begin
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Raise_Program_Error_Msg (File, Line, Rmsg_24'Address);
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end Rcheck_24;
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|
|
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procedure Rcheck_25 (File : System.Address; Line : Integer) is
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|
begin
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Raise_Program_Error_Msg (File, Line, Rmsg_25'Address);
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end Rcheck_25;
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|
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procedure Rcheck_26 (File : System.Address; Line : Integer) is
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|
begin
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Raise_Program_Error_Msg (File, Line, Rmsg_26'Address);
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end Rcheck_26;
|
|
|
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procedure Rcheck_27 (File : System.Address; Line : Integer) is
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|
begin
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|
Raise_Program_Error_Msg (File, Line, Rmsg_27'Address);
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end Rcheck_27;
|
|
|
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procedure Rcheck_28 (File : System.Address; Line : Integer) is
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|
begin
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Raise_Program_Error_Msg (File, Line, Rmsg_28'Address);
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end Rcheck_28;
|
|
|
|
procedure Rcheck_29 (File : System.Address; Line : Integer) is
|
|
begin
|
|
Raise_Storage_Error_Msg (File, Line, Rmsg_29'Address);
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end Rcheck_29;
|
|
|
|
procedure Rcheck_30 (File : System.Address; Line : Integer) is
|
|
begin
|
|
Raise_Storage_Error_Msg (File, Line, Rmsg_30'Address);
|
|
end Rcheck_30;
|
|
|
|
procedure Rcheck_31 (File : System.Address; Line : Integer) is
|
|
begin
|
|
Raise_Storage_Error_Msg (File, Line, Rmsg_31'Address);
|
|
end Rcheck_31;
|
|
|
|
procedure Rcheck_32 (File : System.Address; Line : Integer) is
|
|
begin
|
|
Raise_Storage_Error_Msg (File, Line, Rmsg_32'Address);
|
|
end Rcheck_32;
|
|
|
|
-------------
|
|
-- Reraise --
|
|
-------------
|
|
|
|
procedure Reraise is
|
|
Excep : constant EOA := Get_Current_Excep.all;
|
|
|
|
begin
|
|
Abort_Defer.all;
|
|
Raise_Current_Excep (Excep.Id);
|
|
end Reraise;
|
|
|
|
------------------------
|
|
-- Reraise_Occurrence --
|
|
------------------------
|
|
|
|
procedure Reraise_Occurrence (X : Exception_Occurrence) is
|
|
begin
|
|
if X.Id /= null then
|
|
Abort_Defer.all;
|
|
Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
|
|
Raise_Current_Excep (X.Id);
|
|
end if;
|
|
end Reraise_Occurrence;
|
|
|
|
-------------------------------
|
|
-- Reraise_Occurrence_Always --
|
|
-------------------------------
|
|
|
|
procedure Reraise_Occurrence_Always (X : Exception_Occurrence) is
|
|
begin
|
|
Abort_Defer.all;
|
|
Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
|
|
Raise_Current_Excep (X.Id);
|
|
end Reraise_Occurrence_Always;
|
|
|
|
---------------------------------
|
|
-- Reraise_Occurrence_No_Defer --
|
|
---------------------------------
|
|
|
|
procedure Reraise_Occurrence_No_Defer (X : Exception_Occurrence) is
|
|
begin
|
|
Save_Occurrence_No_Private (Get_Current_Excep.all.all, X);
|
|
Raise_Current_Excep (X.Id);
|
|
end Reraise_Occurrence_No_Defer;
|
|
|
|
---------------------
|
|
-- Save_Occurrence --
|
|
---------------------
|
|
|
|
procedure Save_Occurrence
|
|
(Target : out Exception_Occurrence;
|
|
Source : Exception_Occurrence)
|
|
is
|
|
begin
|
|
Save_Occurrence_No_Private (Target, Source);
|
|
end Save_Occurrence;
|
|
|
|
function Save_Occurrence (Source : Exception_Occurrence) return EOA is
|
|
Target : constant EOA := new Exception_Occurrence;
|
|
begin
|
|
Save_Occurrence (Target.all, Source);
|
|
return Target;
|
|
end Save_Occurrence;
|
|
|
|
--------------------------------
|
|
-- Save_Occurrence_No_Private --
|
|
--------------------------------
|
|
|
|
procedure Save_Occurrence_No_Private
|
|
(Target : out Exception_Occurrence;
|
|
Source : Exception_Occurrence)
|
|
is
|
|
begin
|
|
Target.Id := Source.Id;
|
|
Target.Msg_Length := Source.Msg_Length;
|
|
Target.Num_Tracebacks := Source.Num_Tracebacks;
|
|
Target.Pid := Source.Pid;
|
|
Target.Cleanup_Flag := Source.Cleanup_Flag;
|
|
|
|
Target.Msg (1 .. Target.Msg_Length) :=
|
|
Source.Msg (1 .. Target.Msg_Length);
|
|
|
|
Target.Tracebacks (1 .. Target.Num_Tracebacks) :=
|
|
Source.Tracebacks (1 .. Target.Num_Tracebacks);
|
|
end Save_Occurrence_No_Private;
|
|
|
|
-------------------------
|
|
-- Transfer_Occurrence --
|
|
-------------------------
|
|
|
|
procedure Transfer_Occurrence
|
|
(Target : Exception_Occurrence_Access;
|
|
Source : Exception_Occurrence)
|
|
is
|
|
begin
|
|
-- Setup Target as an exception to be propagated in the calling task
|
|
-- (rendezvous-wise), taking care not to clobber the associated private
|
|
-- data. Target is expected to be a pointer to the calling task's
|
|
-- fixed TSD occurrence, which is very different from Get_Current_Excep
|
|
-- here because this subprogram is called from the called task.
|
|
|
|
Save_Occurrence_No_Private (Target.all, Source);
|
|
end Transfer_Occurrence;
|
|
|
|
-------------------
|
|
-- String_To_EId --
|
|
-------------------
|
|
|
|
function String_To_EId (S : String) return Exception_Id
|
|
renames Stream_Attributes.String_To_EId;
|
|
|
|
------------------
|
|
-- String_To_EO --
|
|
------------------
|
|
|
|
function String_To_EO (S : String) return Exception_Occurrence
|
|
renames Stream_Attributes.String_To_EO;
|
|
|
|
------------------------------
|
|
-- Raise_Exception_No_Defer --
|
|
------------------------------
|
|
|
|
procedure Raise_Exception_No_Defer
|
|
(E : Exception_Id;
|
|
Message : String := "")
|
|
is
|
|
begin
|
|
Exception_Data.Set_Exception_Msg (E, Message);
|
|
|
|
-- Do not call Abort_Defer.all, as specified by the spec
|
|
|
|
Raise_Current_Excep (E);
|
|
end Raise_Exception_No_Defer;
|
|
|
|
---------------
|
|
-- To_Stderr --
|
|
---------------
|
|
|
|
procedure To_Stderr (C : Character) is
|
|
|
|
type int is new Integer;
|
|
|
|
procedure put_char_stderr (C : int);
|
|
pragma Import (C, put_char_stderr, "put_char_stderr");
|
|
|
|
begin
|
|
put_char_stderr (Character'Pos (C));
|
|
end To_Stderr;
|
|
|
|
procedure To_Stderr (S : String) is
|
|
begin
|
|
for J in S'Range loop
|
|
if S (J) /= ASCII.CR then
|
|
To_Stderr (S (J));
|
|
end if;
|
|
end loop;
|
|
end To_Stderr;
|
|
|
|
end Ada.Exceptions;
|