3ede876b32
2006-02-13 Hristian Kirtchev <kirtchev@adacore.com> * a-tasatt.adb, s-osinte-lynxos-3.adb, s-osinte-lynxos.adb, s-osinte-aix.adb, s-interr-sigaction.adb, s-asthan-vms-alpha.adb, s-interr-vms.adb, s-intman-vms.adb, s-interr-vxworks.adb, s-intman-vxworks.adb, s-asthan-vms-alpha.adb, a-ztexio.adb, a-reatim.adb, a-taside.adb, a-textio.adb, a-witeio.adb, prj-attr.adb, s-intman-irix.adb, s-intman-solaris.adb, s-intman-posix.adb, a-dynpri.adb, a-interr.adb, g-dynhta.adb, s-asthan.adb, s-interr.adb, s-pooglo.adb, s-pooloc.adb, s-poosiz.adb, s-tasren.adb, s-tasuti.adb, s-tataat.adb, s-tpobop.adb: Remove redundant with clauses. From-SVN: r111024
251 lines
9.2 KiB
Ada
251 lines
9.2 KiB
Ada
------------------------------------------------------------------------------
|
|
-- --
|
|
-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
|
|
-- --
|
|
-- S Y S T E M . I N T E R R U P T _ M A N A G E M E N T --
|
|
-- --
|
|
-- B o d y --
|
|
-- --
|
|
-- Copyright (C) 1992-2006 Free Software Foundation, Inc. --
|
|
-- --
|
|
-- GNARL 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. GNARL 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 GNARL; 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. --
|
|
-- --
|
|
-- GNARL was developed by the GNARL team at Florida State University. --
|
|
-- Extensive contributions were provided by Ada Core Technologies, Inc. --
|
|
-- --
|
|
------------------------------------------------------------------------------
|
|
|
|
-- This is a Solaris version of this package.
|
|
|
|
-- Make a careful study of all signals available under the OS,
|
|
-- to see which need to be reserved, kept always unmasked,
|
|
-- or kept always unmasked.
|
|
|
|
-- Be on the lookout for special signals that
|
|
-- may be used by the thread library.
|
|
|
|
package body System.Interrupt_Management is
|
|
|
|
use Interfaces.C;
|
|
use System.OS_Interface;
|
|
|
|
type Interrupt_List is array (Interrupt_ID range <>) of Interrupt_ID;
|
|
|
|
Exception_Interrupts : constant Interrupt_List :=
|
|
(SIGFPE, SIGILL, SIGSEGV, SIGBUS);
|
|
|
|
Unreserve_All_Interrupts : Interfaces.C.int;
|
|
pragma Import
|
|
(C, Unreserve_All_Interrupts, "__gl_unreserve_all_interrupts");
|
|
|
|
function State (Int : Interrupt_ID) return Character;
|
|
pragma Import (C, State, "__gnat_get_interrupt_state");
|
|
-- Get interrupt state. Defined in init.c
|
|
-- The input argument is the interrupt number,
|
|
-- and the result is one of the following:
|
|
|
|
User : constant Character := 'u';
|
|
Runtime : constant Character := 'r';
|
|
Default : constant Character := 's';
|
|
-- 'n' this interrupt not set by any Interrupt_State pragma
|
|
-- 'u' Interrupt_State pragma set state to User
|
|
-- 'r' Interrupt_State pragma set state to Runtime
|
|
-- 's' Interrupt_State pragma set state to System (use "default"
|
|
-- system handler)
|
|
|
|
----------------------
|
|
-- Notify_Exception --
|
|
----------------------
|
|
|
|
-- This function identifies the Ada exception to be raised using
|
|
-- the information when the system received a synchronous signal.
|
|
-- Since this function is machine and OS dependent, different code
|
|
-- has to be provided for different target.
|
|
|
|
procedure Notify_Exception
|
|
(signo : Signal;
|
|
info : access siginfo_t;
|
|
context : access ucontext_t);
|
|
|
|
----------------------
|
|
-- Notify_Exception --
|
|
----------------------
|
|
|
|
procedure Notify_Exception
|
|
(signo : Signal;
|
|
info : access siginfo_t;
|
|
context : access ucontext_t)
|
|
is
|
|
pragma Unreferenced (context);
|
|
begin
|
|
-- Check that treatment of exception propagation here
|
|
-- is consistent with treatment of the abort signal in
|
|
-- System.Task_Primitives.Operations.
|
|
|
|
case signo is
|
|
when SIGFPE =>
|
|
case info.si_code is
|
|
when FPE_INTDIV |
|
|
FPE_INTOVF |
|
|
FPE_FLTDIV |
|
|
FPE_FLTOVF |
|
|
FPE_FLTUND |
|
|
FPE_FLTRES |
|
|
FPE_FLTINV |
|
|
FPE_FLTSUB =>
|
|
|
|
raise Constraint_Error;
|
|
|
|
when others =>
|
|
pragma Assert (False);
|
|
null;
|
|
end case;
|
|
|
|
when SIGILL | SIGSEGV | SIGBUS =>
|
|
raise Storage_Error;
|
|
|
|
when others =>
|
|
pragma Assert (False);
|
|
null;
|
|
end case;
|
|
end Notify_Exception;
|
|
|
|
----------------
|
|
-- Initialize --
|
|
----------------
|
|
|
|
Initialized : Boolean := False;
|
|
|
|
procedure Initialize is
|
|
act : aliased struct_sigaction;
|
|
old_act : aliased struct_sigaction;
|
|
mask : aliased sigset_t;
|
|
Result : Interfaces.C.int;
|
|
|
|
begin
|
|
if Initialized then
|
|
return;
|
|
end if;
|
|
|
|
Initialized := True;
|
|
|
|
-- Need to call pthread_init very early because it is doing signal
|
|
-- initializations.
|
|
|
|
pthread_init;
|
|
|
|
-- Change this if you want to use another signal for task abort.
|
|
-- SIGTERM might be a good one.
|
|
|
|
Abort_Task_Interrupt := SIGABRT;
|
|
|
|
act.sa_handler := Notify_Exception'Address;
|
|
|
|
-- Set sa_flags to SA_NODEFER so that during the handler execution
|
|
-- we do not change the Signal_Mask to be masked for the Signal.
|
|
-- This is a temporary fix to the problem that the Signal_Mask is
|
|
-- not restored after the exception (longjmp) from the handler.
|
|
-- The right fix should be made in sigsetjmp so that we save
|
|
-- the Signal_Set and restore it after a longjmp.
|
|
|
|
-- In that case, this field should be changed back to 0. ??? (Dong-Ik)
|
|
|
|
act.sa_flags := 16;
|
|
|
|
Result := sigemptyset (mask'Access);
|
|
pragma Assert (Result = 0);
|
|
|
|
-- ??? For the same reason explained above, we can't mask these
|
|
-- signals because otherwise we won't be able to catch more than
|
|
-- one signal.
|
|
|
|
act.sa_mask := mask;
|
|
|
|
pragma Assert (Keep_Unmasked = (Interrupt_ID'Range => False));
|
|
pragma Assert (Reserve = (Interrupt_ID'Range => False));
|
|
|
|
for J in Exception_Interrupts'Range loop
|
|
if State (Exception_Interrupts (J)) /= User then
|
|
Keep_Unmasked (Exception_Interrupts (J)) := True;
|
|
Reserve (Exception_Interrupts (J)) := True;
|
|
|
|
if State (Exception_Interrupts (J)) /= Default then
|
|
Result :=
|
|
sigaction
|
|
(Signal (Exception_Interrupts (J)), act'Unchecked_Access,
|
|
old_act'Unchecked_Access);
|
|
pragma Assert (Result = 0);
|
|
end if;
|
|
end if;
|
|
end loop;
|
|
|
|
if State (Abort_Task_Interrupt) /= User then
|
|
Keep_Unmasked (Abort_Task_Interrupt) := True;
|
|
Reserve (Abort_Task_Interrupt) := True;
|
|
end if;
|
|
|
|
-- Set SIGINT to unmasked state as long as it's
|
|
-- not in "User" state. Check for Unreserve_All_Interrupts last
|
|
|
|
if State (SIGINT) /= User then
|
|
Keep_Unmasked (SIGINT) := True;
|
|
Reserve (SIGINT) := True;
|
|
end if;
|
|
|
|
-- Check all signals for state that requires keeping them
|
|
-- unmasked and reserved
|
|
|
|
for J in Interrupt_ID'Range loop
|
|
if State (J) = Default or else State (J) = Runtime then
|
|
Keep_Unmasked (J) := True;
|
|
Reserve (J) := True;
|
|
end if;
|
|
end loop;
|
|
|
|
-- Add the set of signals that must always be unmasked for this target
|
|
|
|
for J in Unmasked'Range loop
|
|
Keep_Unmasked (Interrupt_ID (Unmasked (J))) := True;
|
|
Reserve (Interrupt_ID (Unmasked (J))) := True;
|
|
end loop;
|
|
|
|
-- Add target-specific reserved signals
|
|
|
|
for J in Reserved'Range loop
|
|
Reserve (Interrupt_ID (Reserved (J))) := True;
|
|
end loop;
|
|
|
|
-- Process pragma Unreserve_All_Interrupts. This overrides any
|
|
-- settings due to pragma Interrupt_State:
|
|
|
|
if Unreserve_All_Interrupts /= 0 then
|
|
Keep_Unmasked (SIGINT) := False;
|
|
Reserve (SIGINT) := False;
|
|
end if;
|
|
|
|
-- We do not have Signal 0 in reality. We just use this value
|
|
-- to identify not existing signals (see s-intnam.ads). Therefore,
|
|
-- Signal 0 should not be used in all signal related operations hence
|
|
-- mark it as reserved.
|
|
|
|
Reserve (0) := True;
|
|
end Initialize;
|
|
|
|
end System.Interrupt_Management;
|