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diff --git a/gcc-4.9/gcc/testsuite/ada/acats/tests/c9/c954014.a b/gcc-4.9/gcc/testsuite/ada/acats/tests/c9/c954014.a new file mode 100644 index 000000000..53e45a090 --- /dev/null +++ b/gcc-4.9/gcc/testsuite/ada/acats/tests/c9/c954014.a @@ -0,0 +1,485 @@ +-- C954014.A +-- +-- Grant of Unlimited Rights +-- +-- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687, +-- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained +-- unlimited rights in the software and documentation contained herein. +-- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making +-- this public release, the Government intends to confer upon all +-- recipients unlimited rights equal to those held by the Government. +-- These rights include rights to use, duplicate, release or disclose the +-- released technical data and computer software in whole or in part, in +-- any manner and for any purpose whatsoever, and to have or permit others +-- to do so. +-- +-- DISCLAIMER +-- +-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR +-- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED +-- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE +-- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE +-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A +-- PARTICULAR PURPOSE OF SAID MATERIAL. +--* +-- +-- OBJECTIVE: +-- Check that a requeue is not canceled and that the requeueing +-- task is unaffected when a calling task is aborted. Check that the +-- abort is deferred until the entry call is complete. +-- Specifically, check requeue to an entry in a different task, +-- requeue where the entry call has parameters, and requeue +-- without the abort option. +-- +-- TEST DESCRIPTION +-- In the Driver create a task that places a call on the +-- Distributor. In the Distributor requeue this call on the Credit task. +-- Abort the calling task when it is known to be in rendezvous with the +-- Credit task. (We arrange this by using artificial synchronization +-- points in the Driver and the accept body of the Credit task) Ensure +-- that the abort is deferred (the task is not terminated) until the +-- accept body completes. Afterwards, send one extra message through +-- the Distributor to check that the requeueing task has not been +-- disrupted. +-- +-- This series of tests uses a simulation of a transaction driven +-- processing system. Line Drivers accept input from an external source +-- and build them into transaction records. These records are then +-- encapsulated in message tasks which remain extant for the life of the +-- transaction in the system. The message tasks put themselves on the +-- input queue of a Distributor which, from information in the +-- transaction and/or system load conditions forwards them to other +-- operating tasks. These in turn might forward the transactions to yet +-- other tasks for further action. The routing is, in real life, dynamic +-- and unpredictable at the time of message generation. All rerouting in +-- this model is done by means of requeues. +-- +-- +-- CHANGE HISTORY: +-- 06 Dec 94 SAIC ACVC 2.0 +-- 25 Nov 95 SAIC Replaced global variables with protected objects +-- for ACVC 2.0.1. +-- +--! + +with Report; +with ImpDef; + +procedure C954014 is + + -- Arbitrary test values + Credit_Return : constant := 1; + Debit_Return : constant := 2; + + + protected type Shared_Boolean (Initial_Value : Boolean := False) is + procedure Set_True; + procedure Set_False; + function Value return Boolean; + private + Current_Value : Boolean := Initial_Value; + end Shared_Boolean; + + protected body Shared_Boolean is + procedure Set_True is + begin + Current_Value := True; + end Set_True; + + procedure Set_False is + begin + Current_Value := False; + end Set_False; + + function Value return Boolean is + begin + return Current_Value; + end Value; + end Shared_Boolean; + + + TC_Debit_Message_Complete : Shared_Boolean (False); + + -- Synchronization flags for handshaking between the Line_Driver + -- and the Accept body in the Credit Task + TC_Handshake_A : Shared_Boolean (False); + TC_Handshake_B : Shared_Boolean (False); + TC_Handshake_C : Shared_Boolean (False); + TC_Handshake_D : Shared_Boolean (False); + TC_Handshake_E : Shared_Boolean (False); + TC_Handshake_F : Shared_Boolean (False); + + + type Transaction_Code is (Credit, Debit); + + type Transaction_Record; + type acc_Transaction_Record is access Transaction_Record; + type Transaction_Record is + record + ID : integer := 0; + Code : Transaction_Code := Debit; + Account_Number : integer := 0; + Stock_Number : integer := 0; + Quantity : integer := 0; + Return_Value : integer := 0; + TC_Message_Count : integer := 0; + TC_Thru_Distrib : Boolean; + end record; + + + task type Message_Task is + entry Accept_Transaction (In_Transaction : acc_Transaction_Record); + end Message_Task; + type acc_Message_Task is access Message_Task; + + task Line_Driver is + entry start; + end Line_Driver; + + task Distributor is + entry Input(Transaction : acc_Transaction_Record); + end Distributor; + + task Credit_Computation is + entry Input(Transaction : acc_Transaction_Record); + end Credit_Computation; + + task Debit_Computation is + entry Input(Transaction : acc_Transaction_Record); + end Debit_Computation; + + + -- Assemble messages received from an external source + -- Creates a message task for each. The message tasks remain extant + -- for the life of the messages in the system. + -- TC: The Line Driver task would normally be designed to loop + -- continuously creating the messages as input is received. Simulate + -- this but limit it to two dummy messages for this test and use + -- special artificial handshaking checks with the Credit accept body + -- to control the test. Allow it to terminate at the end + -- + task body Line_Driver is + Current_ID : integer := 1; + TC_First_message_sent: Boolean := false; + + procedure Build_Credit_Record + ( Next_Transaction : acc_Transaction_Record ) is + Dummy_Account : constant integer := 100; + begin + Next_Transaction.ID := Current_ID; + Next_Transaction.Code := Credit; + + Next_Transaction.Account_Number := Dummy_Account; + Current_ID := Current_ID + 1; + end Build_Credit_Record; + + + procedure Build_Debit_Record + ( Next_Transaction : acc_Transaction_Record ) is + Dummy_Account : constant integer := 200; + begin + Next_Transaction.ID := Current_ID; + Next_Transaction.Code := Debit; + + Next_Transaction.Account_Number := Dummy_Account; + Current_ID := Current_ID + 1; + end Build_Debit_Record; + + begin + + accept Start; -- Wait for trigger from main + + for i in 1..2 loop -- TC: arbitrarily limit to one credit message + -- and one debit, then complete + declare + -- Create a task for the next message + Next_Message_Task : acc_Message_Task := new Message_Task; + -- Create a record for it + Next_Transaction : acc_Transaction_Record := + new Transaction_Record; + begin + if not TC_First_Message_Sent then + -- send out the first message which will be aborted + Build_Credit_Record ( Next_Transaction ); + Next_Message_Task.Accept_Transaction ( Next_Transaction ); + TC_First_Message_Sent := true; + + -- Wait for Credit task to get into the accept body + -- The call from the Message Task has been requeued by + -- the distributor + while not TC_Handshake_A.Value loop + delay ImpDef.Minimum_Task_Switch; + end loop; + + -- Abort the calling task; the Credit task is guaranteed to + -- be in the accept body + abort Next_Message_Task.all; -- We are still in this declare + -- block + + -- Inform the Credit task that the abort has been initiated + TC_Handshake_B.Set_True; + + -- Now wait for the "acknowledgment" from the Credit task + -- this ensures a complete task switch (at least) + while not TC_Handshake_C.Value loop + delay ImpDef.Minimum_Task_Switch; + end loop; + + -- The aborted task must not terminate till the accept body + -- has completed + if Next_Message_Task'terminated then + Report.Failed ("The abort was not deferred"); + end if; + + -- Inform the Credit task that the termination has been checked + TC_Handshake_D.Set_True; + + -- Now wait for the completion of the accept body in the + -- Credit task + while not TC_Handshake_E.Value loop + delay ImpDef.Minimum_Task_Switch; + end loop; + + while not ( Next_Message_Task'terminated ) loop + delay ImpDef.Minimum_Task_Switch; + end loop; + + -- Indicate to the Main program that this section is complete + TC_Handshake_F.Set_True; + + else + -- The main part of the test is complete. Send one Debit message + -- as further exercise of the Distributor to ensure it has not + -- been affected by the abort of the requeue; + Build_Debit_Record ( Next_Transaction ); + Next_Message_Task.Accept_Transaction ( Next_Transaction ); + end if; + end; -- declare + end loop; + + exception + when others => + Report.Failed ("Unexpected exception in Line_Driver"); + end Line_Driver; + + + + task body Message_Task is + + TC_Original_Transaction_Code : Transaction_Code; + This_Transaction : acc_Transaction_Record := new Transaction_Record; + + begin + + accept Accept_Transaction (In_Transaction : acc_Transaction_Record) do + This_Transaction.all := In_Transaction.all; + end Accept_Transaction; + + -- Note the original code to ensure correct return + TC_Original_Transaction_Code := This_Transaction.Code; + + -- Queue up on Distributor's Input queue + Distributor.Input ( This_Transaction ); + -- This task will now wait for the requeued rendezvous + -- to complete before proceeding + + -- After the required computations have been performed + -- return the Transaction_Record appropriately (probably to an output + -- line driver) + null; -- stub + + -- For the test check that the return values are as expected + if TC_Original_Transaction_Code /= This_Transaction.Code then + -- Incorrect rendezvous + Report.Failed ("Message Task: Incorrect code returned"); + end if; + + if This_Transaction.Code = Credit then + -- The only Credit message was the one that should have been aborted + Report.Failed ("Abort was not effective"); + else + if This_Transaction.Return_Value /= Debit_Return or + This_Transaction.TC_Message_Count /= 1 or not + This_Transaction.TC_Thru_Distrib then + Report.Failed ("Expected path not traversed"); + end if; + TC_Debit_Message_Complete.Set_True; + end if; + + exception + when others => + Report.Failed ("Unexpected exception in Message_Task"); + + end Message_Task; + + + + -- Dispose each input Transaction_Record to the appropriate + -- computation tasks + -- + task body Distributor is + + begin + loop + select + accept Input (Transaction : acc_Transaction_Record) do + + -- Indicate that the message did pass through the + -- Distributor Task + Transaction.TC_Thru_Distrib := true; + + -- Pass this transaction on the appropriate computation + -- task + case Transaction.Code is + when Credit => + requeue Credit_Computation.Input; -- without abort + when Debit => + requeue Debit_Computation.Input; -- without abort + end case; + end Input; + or + terminate; + end select; + end loop; + + exception + when others => + Report.Failed ("Unexpected exception in Distributor"); + end Distributor; + + + + -- Computation task. + -- Note: After the computation is performed in this task and the + -- accept body is completed the rendezvous in the original + -- message task is completed. + task body Credit_Computation is + Message_Count : integer := 0; + begin + loop + select + accept Input ( Transaction : acc_Transaction_Record) do + -- Perform the computations required for this transaction + -- + null; -- stub + + -- The rest of this code is for Test Control + -- + if not Transaction.TC_Thru_Distrib then + Report.Failed + ("Credit Task: Wrong queue, Distributor bypassed"); + end if; + if Transaction.code /= Credit then + Report.Failed + ("Credit Task: Requeue delivered to the wrong queue"); + end if; + + -- for the test plug a known value and count + Transaction.Return_Value := Credit_Return; + -- one, and only one message should pass through + if Message_Count /= 0 then + Report.Failed ("Aborted Requeue was not canceled -1"); + end if; + Message_Count := Message_Count + 1; + Transaction.TC_Message_Count := Message_Count; + + -- Having done the basic housekeeping we now need to signal + -- that we are in the accept body of the credit task. The + -- message has arrived and the Line Driver may now abort the + -- calling task + TC_Handshake_A.Set_True; + + -- Now wait for the Line Driver to inform us the calling + -- task has been aborted + while not TC_Handshake_B.Value loop + delay ImpDef.Minimum_Task_Switch; + end loop; + + -- The abort has taken place + -- Inform the Line Driver that we are still running in the + -- accept body + TC_Handshake_C.Set_True; + + -- Now wait for the Line Driver to digest this information + while not TC_Handshake_D.Value loop + delay ImpDef.Minimum_Task_Switch; + end loop; + + -- The Line driver has checked that the caller is not terminated + -- We can now complete the accept + + end Input; + -- We are out of the accept + TC_Handshake_E.Set_True; + + or + terminate; + end select; + end loop; + exception + when others => + Report.Failed ("Unexpected exception in Credit_Computation"); + end Credit_Computation; + + + + -- Computation task. + -- Note: After the computation is performed in this task and the + -- accept body is completed the rendezvous in the original + -- message task is completed. + task body Debit_Computation is + Message_Count : integer := 0; + begin + loop + select + accept Input (Transaction : acc_Transaction_Record) do + -- Perform the computations required for this message + -- + null; -- stub + + -- The rest of this code is for Test Control + -- + if not Transaction.TC_Thru_Distrib then + Report.Failed + ("Debit Task: Wrong queue, Distributor bypassed"); + end if; + if Transaction.code /= Debit then + Report.Failed + ("Debit Task: Requeue delivered to the wrong queue"); + end if; + + -- for the test plug a known value and count + Transaction.Return_Value := Debit_Return; + -- one, and only one, message should pass through + Message_Count := Message_Count + 1; + Transaction.TC_Message_Count := Message_Count; + end Input; + or + terminate; + end select; + end loop; + exception + when others => + Report.Failed ("Unexpected exception in Debit_Computation"); + + + end Debit_Computation; + + +begin -- c954014 + Report.Test ("C954014", "Abort a task that has a call" & + " requeued_without_abort"); + + Line_Driver.Start; -- Start the test + + -- Wait for the message tasks to complete before reporting the result + -- + while not (TC_Handshake_F.Value -- abort not effective? + and TC_Debit_Message_Complete.Value -- Distributor affected? + and TC_Handshake_E.Value ) loop -- accept not completed? + delay ImpDef.Minimum_Task_Switch; + end loop; + + Report.Result; + +end C954014; |