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jeremybenn |
-- C761007.A
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--
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--
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-- Grant of Unlimited Rights
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--
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-- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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-- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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-- unlimited rights in the software and documentation contained herein.
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-- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
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-- this public release, the Government intends to confer upon all
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-- recipients unlimited rights equal to those held by the Government.
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-- These rights include rights to use, duplicate, release or disclose the
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-- released technical data and computer software in whole or in part, in
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-- any manner and for any purpose whatsoever, and to have or permit others
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-- to do so.
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--
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-- DISCLAIMER
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--
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-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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-- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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-- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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-- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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-- PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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--
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-- OBJECTIVE:
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-- Check that if a finalize procedure invoked by a transfer of control
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-- due to selection of a terminate alternative attempts to propagate an
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-- exception, the exception is ignored, but any other finalizations due
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-- to be performed are performed.
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--
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--
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-- TEST DESCRIPTION:
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-- This test declares a nested controlled data type, and embeds an object
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-- of that type within a protected type. Objects of the protected type
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-- are created and destroyed, and the actions of the embedded controlled
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-- object are checked. The container controlled type causes an exception
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-- as the last part of it's finalization operation.
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--
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-- This test utilizes several tasks to accomplish the objective. The
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-- tasks contain delays to ensure that the expected order of processing
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-- is indeed accomplished.
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--
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-- Subtest 1:
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-- local task object runs to normal completion
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--
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-- Subtest 2:
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-- local task aborts a nested task to cause finalization
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--
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-- Subtest 3:
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-- local task sleeps long enough to allow procedure started
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-- asynchronously to go into infinite loop. Procedure is then aborted
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-- via ATC, causing finalization of objects.
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--
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-- Subtest 4:
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-- local task object takes terminate alternative, causing finalization
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--
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--
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-- CHANGE HISTORY:
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-- 06 JUN 95 SAIC Initial version
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-- 05 APR 96 SAIC Documentation changes
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-- 03 MAR 97 PWB.CTA Allowed two finalization orders for ATC test
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-- 02 DEC 97 EDS Remove duplicate characters from check string.
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--!
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---------------------------------------------------------------- C761007_0
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with Ada.Finalization;
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package C761007_0 is
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type Internal is new Ada.Finalization.Controlled
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with record
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Effect : Character;
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end record;
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procedure Finalize( I: in out Internal );
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Side_Effect : String(1..80); -- way bigger than needed
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Side_Effect_Finger : Natural := 0;
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end C761007_0;
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-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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with TCTouch;
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package body C761007_0 is
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procedure Finalize( I : in out Internal ) is
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Previous_Side_Effect : Boolean := False;
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begin
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-- look to see if this character has been finalized yet
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for SEI in 1..Side_Effect_Finger loop
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Previous_Side_Effect := Previous_Side_Effect
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or Side_Effect(Side_Effect_Finger) = I.Effect;
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end loop;
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-- if not, then tack it on to the string, and touch the character
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if not Previous_Side_Effect then
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Side_Effect_Finger := Side_Effect_Finger +1;
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Side_Effect(Side_Effect_Finger) := I.Effect;
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TCTouch.Touch(I.Effect);
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end if;
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end Finalize;
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end C761007_0;
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---------------------------------------------------------------- C761007_1
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with C761007_0;
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with Ada.Finalization;
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package C761007_1 is
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type Container is new Ada.Finalization.Controlled
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with record
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Effect : Character;
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Content : C761007_0.Internal;
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end record;
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procedure Finalize( C: in out Container );
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Side_Effect : String(1..80); -- way bigger than needed
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Side_Effect_Finger : Natural := 0;
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This_Exception_Is_Supposed_To_Be_Ignored : exception;
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end C761007_1;
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-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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with TCTouch;
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package body C761007_1 is
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procedure Finalize( C: in out Container ) is
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Previous_Side_Effect : Boolean := False;
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begin
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-- look to see if this character has been finalized yet
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for SEI in 1..Side_Effect_Finger loop
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Previous_Side_Effect := Previous_Side_Effect
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or Side_Effect(Side_Effect_Finger) = C.Effect;
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end loop;
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-- if not, then tack it on to the string, and touch the character
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if not Previous_Side_Effect then
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Side_Effect_Finger := Side_Effect_Finger +1;
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Side_Effect(Side_Effect_Finger) := C.Effect;
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TCTouch.Touch(C.Effect);
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end if;
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raise This_Exception_Is_Supposed_To_Be_Ignored;
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end Finalize;
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end C761007_1;
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---------------------------------------------------------------- C761007_2
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with C761007_1;
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package C761007_2 is
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protected type Prot_W_Fin_Obj is
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procedure Set_Effects( Container, Filling: Character );
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private
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The_Data_Under_Test : C761007_1.Container;
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-- finalization for this will occur when the Prot_W_Fin_Obj object
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-- "goes out of existence" for whatever reason.
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end Prot_W_Fin_Obj;
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end C761007_2;
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-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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package body C761007_2 is
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protected body Prot_W_Fin_Obj is
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procedure Set_Effects( Container, Filling: Character ) is
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begin
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The_Data_Under_Test.Effect := Container; -- A, etc.
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The_Data_Under_Test.Content.Effect := Filling; -- B, etc.
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end Set_Effects;
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end Prot_W_Fin_Obj;
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end C761007_2;
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------------------------------------------------------------------ C761007
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with Report;
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with Impdef;
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with TCTouch;
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with C761007_0;
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with C761007_1;
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with C761007_2;
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procedure C761007 is
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task type Subtests( Outer, Inner : Character) is
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entry Ready;
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entry Complete;
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end Subtests;
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task body Subtests is
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Local_Prot_W_Fin_Obj : C761007_2.Prot_W_Fin_Obj;
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begin
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Local_Prot_W_Fin_Obj.Set_Effects( Outer, Inner );
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accept Ready;
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select
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accept Complete;
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or terminate; -- used in Subtest 4
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end select;
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exception
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-- the exception caused by the finalization of Local_Prot_W_Fin_Obj
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-- should never be visible to this scope.
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when others => Report.Failed("Exception in a Subtest object "
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& Outer & Inner);
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end Subtests;
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procedure Subtest_1 is
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-- check the case where "nothing special" happens.
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This_Subtest : Subtests( 'A', 'B' );
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begin
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This_Subtest.Ready;
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This_Subtest.Complete;
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while not This_Subtest'Terminated loop -- wait for finalization
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delay Impdef.Clear_Ready_Queue;
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end loop;
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-- in the finalization of This_Subtest, the controlled object embedded in
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-- the Prot_W_Fin_Obj will finalize. An exception is raised in the
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-- container object, after "touching" it's tag character.
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-- The finalization of the contained controlled object must be performed.
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TCTouch.Validate( "AB", "Item embedded in task" );
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exception
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when others => Report.Failed("Undesirable exception in Subtest_1");
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end Subtest_1;
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procedure Subtest_2 is
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-- check for explicit abort
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task Subtest_Task is
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entry Complete;
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end Subtest_Task;
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task body Subtest_Task is
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task Nesting;
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task body Nesting is
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Deep_Nesting : Subtests( 'E', 'F' );
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begin
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if Report.Ident_Bool( True ) then
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-- controlled objects have been created in the elaboration of
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-- Deep_Nesting. Deep_Nesting must call the Set_Effects operation
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-- in the Prot_W_Fin_Obj, and then hang waiting for the Complete
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-- entry call.
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Deep_Nesting.Ready;
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abort Deep_Nesting;
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else
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Report.Failed("Dead code in Nesting");
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end if;
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exception
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when others => Report.Failed("Exception in Subtest_Task.Nesting");
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end Nesting;
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Local_2 : C761007_2.Prot_W_Fin_Obj;
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begin
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-- Nesting has activated at this point, which implies the activation
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-- of Deep_Nesting as well.
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Local_2.Set_Effects( 'C', 'D' );
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-- wait for Nesting to terminate
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while not Nesting'Terminated loop
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delay Impdef.Clear_Ready_Queue;
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end loop;
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accept Complete;
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exception
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when others => Report.Failed("Exception in Subtest_Task");
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end Subtest_Task;
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begin
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-- wait for everything in Subtest_Task to happen
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Subtest_Task.Complete;
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while not Subtest_Task'Terminated loop -- wait for finalization
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delay Impdef.Clear_Ready_Queue;
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end loop;
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TCTouch.Validate( "EFCD", "Aborted nested task" );
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exception
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when others => Report.Failed("Undesirable exception in Subtest_2");
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end Subtest_2;
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procedure Subtest_3 is
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-- check abort caused by asynchronous transfer of control
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task Subtest_3_Task is
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entry Complete;
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end Subtest_3_Task;
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procedure Check_Atc_Operation is
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Check_Atc : C761007_2.Prot_W_Fin_Obj;
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begin
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Check_Atc.Set_Effects( 'G', 'H' );
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while Report.Ident_Bool( True ) loop -- wait to be aborted
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if Report.Ident_Bool( True ) then
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Impdef.Exceed_Time_Slice;
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delay Impdef.Switch_To_New_Task;
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else
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Report.Failed("Optimization prevention");
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end if;
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end loop;
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Report.Failed("Check_Atc_Operation loop completed");
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end Check_Atc_Operation;
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task body Subtest_3_Task is
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task Nesting is
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entry Complete;
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end Nesting;
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task body Nesting is
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Nesting_3 : C761007_2.Prot_W_Fin_Obj;
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begin
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Nesting_3.Set_Effects( 'G', 'H' );
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-- give Check_Atc_Operation sufficient time to perform it's
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-- Set_Effects on it's local Prot_W_Fin_Obj object
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delay Impdef.Clear_Ready_Queue;
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accept Complete;
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exception
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when others => Report.Failed("Exception in Subtest_3_Task.Nesting");
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end Nesting;
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Local_3 : C761007_2.Prot_W_Fin_Obj;
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begin -- Subtest_3_Task
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Local_3.Set_Effects( 'I', 'J' );
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select
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Nesting.Complete;
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then abort ---------------------------------------------------- cause KL
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Check_ATC_Operation;
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end select;
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accept Complete;
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exception
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when others => Report.Failed("Exception in Subtest_3_Task");
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end Subtest_3_Task;
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begin -- Subtest_3
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Subtest_3_Task.Complete;
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while not Subtest_3_Task'Terminated loop -- wait for finalization
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delay Impdef.Clear_Ready_Queue;
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end loop;
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TCTouch.Validate( "GHIJ", "Asynchronously aborted operation" );
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exception
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when others => Report.Failed("Undesirable exception in Subtest_3");
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end Subtest_3;
|
383 |
|
|
|
384 |
|
|
procedure Subtest_4 is
|
385 |
|
|
-- check the case where transfer is caused by terminate alternative
|
386 |
|
|
-- highly similar to Subtest_1
|
387 |
|
|
|
388 |
|
|
This_Subtest : Subtests( 'M', 'N' );
|
389 |
|
|
begin
|
390 |
|
|
|
391 |
|
|
This_Subtest.Ready;
|
392 |
|
|
-- don't call This_Subtest.Complete;
|
393 |
|
|
|
394 |
|
|
exception
|
395 |
|
|
when others => Report.Failed("Undesirable exception in Subtest_4");
|
396 |
|
|
|
397 |
|
|
end Subtest_4;
|
398 |
|
|
|
399 |
|
|
begin -- Main test procedure.
|
400 |
|
|
|
401 |
|
|
Report.Test ("C761007", "Check that if a finalize procedure invoked by " &
|
402 |
|
|
"a transfer of control or selection of a " &
|
403 |
|
|
"terminate alternative attempts to propagate " &
|
404 |
|
|
"an exception, the exception is ignored, but " &
|
405 |
|
|
"any other finalizations due to be performed " &
|
406 |
|
|
"are performed" );
|
407 |
|
|
|
408 |
|
|
Subtest_1; -- checks internal
|
409 |
|
|
|
410 |
|
|
Subtest_2; -- checks internal
|
411 |
|
|
|
412 |
|
|
Subtest_3; -- checks internal
|
413 |
|
|
|
414 |
|
|
Subtest_4;
|
415 |
|
|
TCTouch.Validate( "MN", "transfer due to terminate alternative" );
|
416 |
|
|
|
417 |
|
|
Report.Result;
|
418 |
|
|
|
419 |
|
|
end C761007;
|