-- CB20006.A
|
-- CB20006.A
|
--
|
--
|
-- Grant of Unlimited Rights
|
-- Grant of Unlimited Rights
|
--
|
--
|
-- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
|
-- 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
|
-- 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 in the software and documentation contained herein.
|
-- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
|
-- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
|
-- this public release, the Government intends to confer upon all
|
-- this public release, the Government intends to confer upon all
|
-- recipients unlimited rights equal to those held by the Government.
|
-- recipients unlimited rights equal to those held by the Government.
|
-- These rights include rights to use, duplicate, release or disclose the
|
-- These rights include rights to use, duplicate, release or disclose the
|
-- released technical data and computer software in whole or in part, in
|
-- 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
|
-- any manner and for any purpose whatsoever, and to have or permit others
|
-- to do so.
|
-- to do so.
|
--
|
--
|
-- DISCLAIMER
|
-- DISCLAIMER
|
--
|
--
|
-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
|
-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
|
-- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
|
-- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
|
-- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
|
-- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
|
-- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
|
-- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
|
-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
|
-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
|
-- PARTICULAR PURPOSE OF SAID MATERIAL.
|
-- PARTICULAR PURPOSE OF SAID MATERIAL.
|
--*
|
--*
|
--
|
--
|
-- OBJECTIVE:
|
-- OBJECTIVE:
|
-- Check that exceptions are raised and properly handled (including
|
-- Check that exceptions are raised and properly handled (including
|
-- propagation by reraise) in protected operations.
|
-- propagation by reraise) in protected operations.
|
--
|
--
|
-- TEST DESCRIPTION:
|
-- TEST DESCRIPTION:
|
-- Declare a package with a protected type, including protected operation
|
-- Declare a package with a protected type, including protected operation
|
-- declarations and private data, simulating a counting semaphore.
|
-- declarations and private data, simulating a counting semaphore.
|
-- In the main procedure, perform calls on protected operations
|
-- In the main procedure, perform calls on protected operations
|
-- of the protected object designed to induce the raising of exceptions.
|
-- of the protected object designed to induce the raising of exceptions.
|
--
|
--
|
-- The exceptions raised are to be initially handled in the protected
|
-- The exceptions raised are to be initially handled in the protected
|
-- operations, but this handling involves the reraise of the exception
|
-- operations, but this handling involves the reraise of the exception
|
-- and the propagation of the exception to the caller.
|
-- and the propagation of the exception to the caller.
|
--
|
--
|
-- Ensure that the exceptions are raised, handled / reraised successfully
|
-- Ensure that the exceptions are raised, handled / reraised successfully
|
-- in protected procedures and functions. Use "others" handlers in the
|
-- in protected procedures and functions. Use "others" handlers in the
|
-- protected operations.
|
-- protected operations.
|
--
|
--
|
--
|
--
|
-- CHANGE HISTORY:
|
-- CHANGE HISTORY:
|
-- 06 Dec 94 SAIC ACVC 2.0
|
-- 06 Dec 94 SAIC ACVC 2.0
|
--
|
--
|
--!
|
--!
|
|
|
package CB20006_0 is -- Package Semaphore.
|
package CB20006_0 is -- Package Semaphore.
|
|
|
Reraised_In_Function,
|
Reraised_In_Function,
|
Reraised_In_Procedure,
|
Reraised_In_Procedure,
|
Handled_In_Function_Caller,
|
Handled_In_Function_Caller,
|
Handled_In_Procedure_Caller : Boolean := False;
|
Handled_In_Procedure_Caller : Boolean := False;
|
|
|
Resource_Overflow,
|
Resource_Overflow,
|
Resource_Underflow : exception;
|
Resource_Underflow : exception;
|
|
|
protected type Counting_Semaphore (Max_Resources : Integer) is
|
protected type Counting_Semaphore (Max_Resources : Integer) is
|
procedure Secure;
|
procedure Secure;
|
function Resource_Limit_Exceeded return Boolean;
|
function Resource_Limit_Exceeded return Boolean;
|
procedure Release;
|
procedure Release;
|
private
|
private
|
Count : Integer := Max_Resources;
|
Count : Integer := Max_Resources;
|
end Counting_Semaphore;
|
end Counting_Semaphore;
|
|
|
end CB20006_0;
|
end CB20006_0;
|
|
|
--=================================================================--
|
--=================================================================--
|
|
|
with Report;
|
with Report;
|
|
|
package body CB20006_0 is -- Package Semaphore.
|
package body CB20006_0 is -- Package Semaphore.
|
|
|
protected body Counting_Semaphore is
|
protected body Counting_Semaphore is
|
|
|
procedure Secure is
|
procedure Secure is
|
begin
|
begin
|
if (Count = 0) then -- No resources left to secure.
|
if (Count = 0) then -- No resources left to secure.
|
raise Resource_Underflow;
|
raise Resource_Underflow;
|
Report.Failed
|
Report.Failed
|
("Program control not transferred by raise in Procedure Secure");
|
("Program control not transferred by raise in Procedure Secure");
|
else
|
else
|
Count := Count - 1; -- Available resources decremented.
|
Count := Count - 1; -- Available resources decremented.
|
end if;
|
end if;
|
exception
|
exception
|
when Resource_Underflow =>
|
when Resource_Underflow =>
|
Reraised_In_Procedure := True;
|
Reraised_In_Procedure := True;
|
raise; -- Exception propagated to caller.
|
raise; -- Exception propagated to caller.
|
Report.Failed ("Exception not propagated to caller from Secure");
|
Report.Failed ("Exception not propagated to caller from Secure");
|
when others =>
|
when others =>
|
Report.Failed ("Unexpected exception raised in Secure");
|
Report.Failed ("Unexpected exception raised in Secure");
|
end Secure;
|
end Secure;
|
|
|
|
|
function Resource_Limit_Exceeded return Boolean is
|
function Resource_Limit_Exceeded return Boolean is
|
begin
|
begin
|
if (Count > Max_Resources) then
|
if (Count > Max_Resources) then
|
raise Resource_Overflow; -- Exception used as control flow
|
raise Resource_Overflow; -- Exception used as control flow
|
-- mechanism.
|
-- mechanism.
|
Report.Failed
|
Report.Failed
|
("Specific raise did not alter program control" &
|
("Specific raise did not alter program control" &
|
" from Resource_Limit_Exceeded");
|
" from Resource_Limit_Exceeded");
|
else
|
else
|
return (False);
|
return (False);
|
end if;
|
end if;
|
exception
|
exception
|
when others =>
|
when others =>
|
Reraised_In_Function := True;
|
Reraised_In_Function := True;
|
raise; -- Exception propagated to caller.
|
raise; -- Exception propagated to caller.
|
Report.Failed ("Exception not propagated to caller" &
|
Report.Failed ("Exception not propagated to caller" &
|
" from Resource_Limit_Exceeded");
|
" from Resource_Limit_Exceeded");
|
end Resource_Limit_Exceeded;
|
end Resource_Limit_Exceeded;
|
|
|
|
|
procedure Release is
|
procedure Release is
|
begin
|
begin
|
Count := Count + 1; -- Count of resources available
|
Count := Count + 1; -- Count of resources available
|
-- incremented.
|
-- incremented.
|
if Resource_Limit_Exceeded then -- Call to protected operation
|
if Resource_Limit_Exceeded then -- Call to protected operation
|
Count := Count - 1; -- function that raises/reraises
|
Count := Count - 1; -- function that raises/reraises
|
-- an exception.
|
-- an exception.
|
Report.Failed("Resource limit exceeded");
|
Report.Failed("Resource limit exceeded");
|
end if;
|
end if;
|
|
|
exception
|
exception
|
when others =>
|
when others =>
|
raise; -- Reraised and propagated again.
|
raise; -- Reraised and propagated again.
|
Report.Failed ("Exception not reraised by procedure Release");
|
Report.Failed ("Exception not reraised by procedure Release");
|
end Release;
|
end Release;
|
|
|
|
|
end Counting_Semaphore;
|
end Counting_Semaphore;
|
|
|
end CB20006_0;
|
end CB20006_0;
|
|
|
|
|
--=================================================================--
|
--=================================================================--
|
|
|
|
|
with CB20006_0; -- Package Semaphore.
|
with CB20006_0; -- Package Semaphore.
|
with Report;
|
with Report;
|
|
|
procedure CB20006 is
|
procedure CB20006 is
|
begin
|
begin
|
|
|
Report.Test ("CB20006", "Check that exceptions are raised and " &
|
Report.Test ("CB20006", "Check that exceptions are raised and " &
|
"handled / reraised and propagated " &
|
"handled / reraised and propagated " &
|
"correctly by protected operations" );
|
"correctly by protected operations" );
|
|
|
Test_Block:
|
Test_Block:
|
declare
|
declare
|
|
|
package Semaphore renames CB20006_0;
|
package Semaphore renames CB20006_0;
|
|
|
Total_Resources_Available : constant := 1;
|
Total_Resources_Available : constant := 1;
|
|
|
Resources : Semaphore.Counting_Semaphore (Total_Resources_Available);
|
Resources : Semaphore.Counting_Semaphore (Total_Resources_Available);
|
-- An object of protected type.
|
-- An object of protected type.
|
|
|
begin
|
begin
|
|
|
Allocate_Resources:
|
Allocate_Resources:
|
declare
|
declare
|
Loop_Count : Integer := Total_Resources_Available + 1;
|
Loop_Count : Integer := Total_Resources_Available + 1;
|
begin
|
begin
|
for I in 1..Loop_Count loop -- Force exception
|
for I in 1..Loop_Count loop -- Force exception
|
Resources.Secure;
|
Resources.Secure;
|
end loop;
|
end loop;
|
Report.Failed
|
Report.Failed
|
("Exception not propagated from protected operation Secure");
|
("Exception not propagated from protected operation Secure");
|
exception
|
exception
|
when Semaphore.Resource_Underflow => -- Exception propagated
|
when Semaphore.Resource_Underflow => -- Exception propagated
|
Semaphore.Handled_In_Procedure_Caller := True; -- from protected
|
Semaphore.Handled_In_Procedure_Caller := True; -- from protected
|
when others => -- procedure.
|
when others => -- procedure.
|
Semaphore.Handled_In_Procedure_Caller := False;
|
Semaphore.Handled_In_Procedure_Caller := False;
|
end Allocate_Resources;
|
end Allocate_Resources;
|
|
|
|
|
Deallocate_Resources:
|
Deallocate_Resources:
|
declare
|
declare
|
Loop_Count : Integer := Total_Resources_Available + 1;
|
Loop_Count : Integer := Total_Resources_Available + 1;
|
begin
|
begin
|
for I in 1..Loop_Count loop -- Force exception
|
for I in 1..Loop_Count loop -- Force exception
|
Resources.Release;
|
Resources.Release;
|
end loop;
|
end loop;
|
Report.Failed
|
Report.Failed
|
("Exception not propagated from protected operation Release");
|
("Exception not propagated from protected operation Release");
|
exception
|
exception
|
when Semaphore.Resource_Overflow => -- Exception propagated
|
when Semaphore.Resource_Overflow => -- Exception propagated
|
Semaphore.Handled_In_Function_Caller := True; -- from protected
|
Semaphore.Handled_In_Function_Caller := True; -- from protected
|
when others => -- function.
|
when others => -- function.
|
Semaphore.Handled_In_Function_Caller := False;
|
Semaphore.Handled_In_Function_Caller := False;
|
end Deallocate_Resources;
|
end Deallocate_Resources;
|
|
|
|
|
if not (Semaphore.Reraised_In_Procedure and
|
if not (Semaphore.Reraised_In_Procedure and
|
Semaphore.Reraised_In_Function and
|
Semaphore.Reraised_In_Function and
|
Semaphore.Handled_In_Procedure_Caller and
|
Semaphore.Handled_In_Procedure_Caller and
|
Semaphore.Handled_In_Function_Caller)
|
Semaphore.Handled_In_Function_Caller)
|
then -- Incorrect excpt. handling
|
then -- Incorrect excpt. handling
|
Report.Failed -- in protected operations.
|
Report.Failed -- in protected operations.
|
("Improper exception handling/reraising by protected operations");
|
("Improper exception handling/reraising by protected operations");
|
end if;
|
end if;
|
|
|
exception
|
exception
|
|
|
when others =>
|
when others =>
|
Report.Failed ("Unexpected exception " &
|
Report.Failed ("Unexpected exception " &
|
" raised and propagated in test");
|
" raised and propagated in test");
|
end Test_Block;
|
end Test_Block;
|
|
|
Report.Result;
|
Report.Result;
|
|
|
|
|
end CB20006;
|
end CB20006;
|
|
|
