diff options
Diffstat (limited to 'gcc-4.9/gcc/testsuite/ada/acats/tests/cb/cb40005.a')
| -rw-r--r-- | gcc-4.9/gcc/testsuite/ada/acats/tests/cb/cb40005.a | 339 |
1 files changed, 339 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/ada/acats/tests/cb/cb40005.a b/gcc-4.9/gcc/testsuite/ada/acats/tests/cb/cb40005.a new file mode 100644 index 000000000..681ec18ff --- /dev/null +++ b/gcc-4.9/gcc/testsuite/ada/acats/tests/cb/cb40005.a @@ -0,0 +1,339 @@ +-- CB40005.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 exceptions raised in non-generic code can be handled by +-- a procedure in a generic package. Check that the exception identity +-- can be properly retrieved from the generic code and used by the +-- non-generic code. +-- +-- TEST DESCRIPTION: +-- This test models a possible usage paradigm for the type: +-- Ada.Exceptions.Exception_Occurrence. +-- +-- A generic package takes access to procedure types (allowing it to +-- be used at any accessibility level) and defines a "fail soft" +-- procedure that takes designators to a procedure to call, a +-- procedure to call in the event that it fails, and a function to +-- call to determine the next action. +-- +-- In the event an exception occurs on the call to the first procedure, +-- the exception is stored in a stack; along with the designator to the +-- procedure that caused it; allowing the procedure to be called again, +-- or the exception to be re-raised. +-- +-- A full implementation of such a tool would use a more robust storage +-- mechanism, and would provide a more flexible interface. +-- +-- +-- CHANGE HISTORY: +-- 29 MAR 96 SAIC Initial version +-- 12 NOV 96 SAIC Revised for 2.1 release +-- +--! + +----------------------------------------------------------------- CB40005_0 + +with Ada.Exceptions; +generic + type Proc_Pointer is access procedure; + type Func_Pointer is access function return Proc_Pointer; +package CB40005_0 is -- Fail_Soft + + + procedure Fail_Soft_Call( Proc_To_Call : Proc_Pointer; + Proc_To_Call_On_Exception : Proc_Pointer := null; + Retry_Routine : Func_Pointer := null ); + + function Top_Event_Exception return Ada.Exceptions.Exception_Occurrence; + + function Top_Event_Procedure return Proc_Pointer; + + procedure Pop_Event; + + function Event_Stack_Size return Natural; + +end CB40005_0; -- Fail_Soft + +-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- CB40005_0 + +with Report; +package body CB40005_0 is + + type History_Event is record + Exception_Event : Ada.Exceptions.Exception_Occurrence_Access; + Procedure_Called : Proc_Pointer; + end record; + + procedure Store_Event( Proc_Called : Proc_Pointer; + Error : Ada.Exceptions.Exception_Occurrence ); + + procedure Fail_Soft_Call( Proc_To_Call : Proc_Pointer; + Proc_To_Call_On_Exception : Proc_Pointer := null; + Retry_Routine : Func_Pointer := null ) is + + Current_Proc_To_Call : Proc_Pointer := Proc_To_Call; + + begin + while Current_Proc_To_Call /= null loop + begin + Current_Proc_To_Call.all; -- call procedure through pointer + Current_Proc_To_Call := null; + exception + when Capture: others => + Store_Event( Current_Proc_To_Call, Capture ); + if Proc_To_Call_On_Exception /= null then + Proc_To_Call_On_Exception.all; + end if; + if Retry_Routine /= null then + Current_Proc_To_Call := Retry_Routine.all; + else + Current_Proc_To_Call := null; + end if; + end; + end loop; + end Fail_Soft_Call; + + Stack : array(1..10) of History_Event; -- minimal, sufficient for testing + + Stack_Top : Natural := 0; + + procedure Store_Event( Proc_Called : Proc_Pointer; + Error : Ada.Exceptions.Exception_Occurrence ) + is + begin + Stack_Top := Stack_Top +1; + Stack(Stack_Top) := ( Ada.Exceptions.Save_Occurrence(Error), + Proc_Called ); + end Store_Event; + + function Top_Event_Exception return Ada.Exceptions.Exception_Occurrence is + begin + if Stack_Top > 0 then + return Stack(Stack_Top).Exception_Event.all; + else + return Ada.Exceptions.Null_Occurrence; + end if; + end Top_Event_Exception; + + function Top_Event_Procedure return Proc_Pointer is + begin + if Stack_Top > 0 then + return Stack(Stack_Top).Procedure_Called; + else + return null; + end if; + end Top_Event_Procedure; + + procedure Pop_Event is + begin + if Stack_Top > 0 then + Stack_Top := Stack_Top -1; + else + Report.Failed("Stack Error"); + end if; + end Pop_Event; + + function Event_Stack_Size return Natural is + begin + return Stack_Top; + end Event_Stack_Size; + +end CB40005_0; + +------------------------------------------------------------------- CB40005 + +with Report; +with TCTouch; +with CB40005_0; +with Ada.Exceptions; +procedure CB40005 is + + type Proc_Pointer is access procedure; + type Func_Pointer is access function return Proc_Pointer; + + package Fail_Soft is new CB40005_0(Proc_Pointer, Func_Pointer); + + procedure Cause_Standard_Exception; + + procedure Cause_Visible_Exception; + + procedure Cause_Invisible_Exception; + + Exception_Procedure_Pointer : Proc_Pointer; + + Visible_Exception : exception; + + procedure Action_On_Exception; + + function Retry_Procedure return Proc_Pointer; + + Raise_Error : Boolean; + + -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- + + procedure Cause_Standard_Exception is + begin + TCTouch.Touch('S'); --------------------------------------------------- S + if Raise_Error then + raise Constraint_Error; + end if; + end Cause_Standard_Exception; + + procedure Cause_Visible_Exception is + begin + TCTouch.Touch('V'); --------------------------------------------------- V + if Raise_Error then + raise Visible_Exception; + end if; + end Cause_Visible_Exception; + + procedure Cause_Invisible_Exception is + Invisible_Exception : exception; + begin + TCTouch.Touch('I'); --------------------------------------------------- I + if Raise_Error then + raise Invisible_Exception; + end if; + end Cause_Invisible_Exception; + + procedure Action_On_Exception is + begin + TCTouch.Touch('A'); --------------------------------------------------- A + end Action_On_Exception; + + function Retry_Procedure return Proc_Pointer is + begin + TCTouch.Touch('R'); --------------------------------------------------- R + return Action_On_Exception'Access; + end Retry_Procedure; + + -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- + +begin -- Main test procedure. + + Report.Test ("CB40005", "Check that exceptions raised in non-generic " & + "code can be handled by a procedure in a generic " & + "package. Check that the exception identity can " & + "be properly retrieved from the generic code and " & + "used by the non-generic code" ); + + -- first, check that the no exception cases cause no action on the stack + Raise_Error := False; + + Fail_Soft.Fail_Soft_Call( Cause_Standard_Exception'Access ); -- S + + Fail_Soft.Fail_Soft_Call( Cause_Visible_Exception'Access, -- V + Action_On_Exception'Access, + Retry_Procedure'Access ); + + Fail_Soft.Fail_Soft_Call( Cause_Invisible_Exception'Access, -- I + null, + Retry_Procedure'Access ); + + TCTouch.Assert( Fail_Soft.Event_Stack_Size = 0, "Empty stack"); + + TCTouch.Validate( "SVI", "Non error case check" ); + + -- second, check that error cases add to the stack + Raise_Error := True; + + Fail_Soft.Fail_Soft_Call( Cause_Standard_Exception'Access ); -- S + + Fail_Soft.Fail_Soft_Call( Cause_Visible_Exception'Access, -- V + Action_On_Exception'Access, -- A + Retry_Procedure'Access ); -- RA + + Fail_Soft.Fail_Soft_Call( Cause_Invisible_Exception'Access, -- I + null, + Retry_Procedure'Access ); -- RA + + TCTouch.Assert( Fail_Soft.Event_Stack_Size = 3, "Stack = 3"); + + TCTouch.Validate( "SVARAIRA", "Error case check" ); + + -- check that the exceptions and procedure were stored correctly + -- on the stack + Raise_Error := False; + + -- return procedure pointer from top of stack and call the procedure + -- through that pointer: + + Fail_Soft.Top_Event_Procedure.all; + + TCTouch.Validate( "I", "Invisible case unwind" ); + + begin + Ada.Exceptions.Raise_Exception( + Ada.Exceptions.Exception_Identity(Fail_Soft.Top_Event_Exception) ); + Report.Failed("1: Exception not raised"); + exception + when Constraint_Error => Report.Failed("1: Raised Constraint_Error"); + when Visible_Exception => Report.Failed("1: Raised Visible_Exception"); + when others => null; -- expected case + end; + + Fail_Soft.Pop_Event; + + -- return procedure pointer from top of stack and call the procedure + -- through that pointer: + + Fail_Soft.Top_Event_Procedure.all; + + TCTouch.Validate( "V", "Visible case unwind" ); + + begin + Ada.Exceptions.Raise_Exception( + Ada.Exceptions.Exception_Identity(Fail_Soft.Top_Event_Exception) ); + Report.Failed("2: Exception not raised"); + exception + when Constraint_Error => Report.Failed("2: Raised Constraint_Error"); + when Visible_Exception => null; -- expected case + when others => Report.Failed("2: Raised Invisible_Exception"); + end; + + Fail_Soft.Pop_Event; + + Fail_Soft.Top_Event_Procedure.all; + + TCTouch.Validate( "S", "Standard case unwind" ); + + begin + Ada.Exceptions.Raise_Exception( + Ada.Exceptions.Exception_Identity(Fail_Soft.Top_Event_Exception) ); + Report.Failed("3: Exception not raised"); + exception + when Constraint_Error => null; -- expected case + when Visible_Exception => Report.Failed("3: Raised Visible_Exception"); + when others => Report.Failed("3: Raised Invisible_Exception"); + end; + + Fail_Soft.Pop_Event; + + TCTouch.Assert( Fail_Soft.Event_Stack_Size = 0, "Stack empty after pops"); + + Report.Result; + +end CB40005; |