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diff --git a/gcc-4.9/gcc/testsuite/ada/acats/tests/c3/c3a2003.a b/gcc-4.9/gcc/testsuite/ada/acats/tests/c3/c3a2003.a new file mode 100644 index 000000000..deb92f1a8 --- /dev/null +++ b/gcc-4.9/gcc/testsuite/ada/acats/tests/c3/c3a2003.a @@ -0,0 +1,329 @@ +-- C3A2003.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, for X'Access of a general access type A, Program_Error is +-- raised if the accessibility level of X is deeper than that of A. +-- Check for the case where X denotes a view that is a dereference of an +-- access parameter, or a rename thereof. Check for the case where X is +-- an access parameter and the corresponding actual is another access +-- parameter. +-- +-- TEST DESCRIPTION: +-- In order to satisfy accessibility requirements, the designated +-- object X must be at the same or a less deep nesting level than the +-- general access type A -- X must "live" as long as A. Nesting +-- levels are the run-time nestings of masters: block statements; +-- subprogram, task, and entry bodies; and accept statements. Packages +-- are invisible to accessibility rules. +-- +-- This test declares subprograms with access parameters, within which +-- 'Access is attempted on a dereference of an access parameter, and +-- assigned to an access object whose type A is declared at some nesting +-- level. The test verifies that Program_Error is raised if the actual +-- corresponding to the access parameter is another access parameter, +-- and the actual corresponding to this second access parameter is: +-- +-- (1) an expression of a named access type, and the accessibility +-- level of the named access type is deeper than that of the +-- access type A. +-- +-- (2) a reference to the Access attribute (e.g., X'Access), and +-- the accessibility level of X is deeper than that of the +-- access type A. +-- +-- Note that the static nesting level of the actual corresponding to the +-- access parameter can be deeper than that of the type A -- it is +-- the run-time nesting that matters for accessibility rules. Consider +-- the case where the access type A is declared within the called +-- subprogram. The accessibility check will never fail, even if the +-- actual happens to have a deeper static nesting level: +-- +-- procedure P (X: access T) is +-- type A is access all T; -- Static level = 2, e.g. +-- Acc : A := X.all'Access; -- Check should never fail. +-- begin null; end; +-- . . . +-- procedure Q (Y: access T) is +-- begin +-- P(Y); +-- end; +-- . . . +-- declare +-- Actual : aliased T; -- Static level = 3, e.g. +-- begin +-- Q (Actual'Access); +-- end; +-- +-- For the execution of Q (and hence P), the accessibility level of +-- type A will always be deeper than that of Actual, so there is no +-- danger of a dangling reference arising from the assignment to +-- Acc. Thus, X.all'Access is safe, even though the static nesting +-- level of Actual is deeper than that of A. +-- +-- +-- CHANGE HISTORY: +-- 06 Dec 94 SAIC ACVC 2.0 +-- 15 Jul 98 EDS Avoid optimization. +-- 28 Jun 02 RLB Added pragma Elaborate_All (Report);. +--! + +with report; use report; pragma Elaborate_All (report); +package C3A2003_0 is + + type Desig is array (1 .. 10) of Integer; + + X0 : aliased Desig := (Desig'Range => Ident_Int(3)); -- Level = 0. + + type Acc_L0 is access all Desig; -- Level = 0. + A0 : Acc_L0; + + type Result_Kind is (OK, P_E, O_E); + + procedure Target_Is_Level_0_Nest (Y: access Desig; S: out Result_Kind); + procedure Never_Fails_Nest (Y: access Desig; S: out Result_Kind); + procedure Never_Fails_Same (Y: access Desig; S: out Result_Kind); + +end C3A2003_0; + + + --==================================================================-- + + +package body C3A2003_0 is + + procedure Target_Is_Level_0_Nest (Y: access Desig; S: out Result_Kind) is + + + -- This procedure utilizes 'Access on a dereference of an access + -- parameter, and assigned to an access object whose type A is + -- declared at some nesting level. Program_Error is raised if + -- the accessibility level of the operand type is deeper than that + -- of the target type. + + procedure Nested (X: access Desig; R: out Result_Kind) is + -- Dereference of an access_to_object value is aliased. + Ren : Desig renames X.all; -- Renaming of a dereference + begin -- of an access parameter. + -- The accessibility level of type A0 is 0. + A0 := Ren'Access; + R := OK; + exception + when Program_Error => + R := P_E; + when others => + R := O_E; + end Nested; + + begin -- Target_Is_Level_0_Nest + Nested (Y, S); + end Target_Is_Level_0_Nest; + + ------------------------------------------------------------------ + + procedure Never_Fails_Nest (Y: access Desig; S: out Result_Kind) is + + type Acc_Deeper is access all Desig; + AD : Acc_Deeper; + + function Nested (X: access Desig) return Result_Kind is + begin + -- X.all'Access below will always be safe, since the accessibility + -- level (although not necessarily the static nesting depth) of the + -- type of AD will always be deeper than or the same as that of the + -- actual corresponding to Y. + AD := X.all'Access; + if Ident_Int (AD(4)) /= 3 then --Avoid Optimization of AD + FAILED ("Initial Values not correct."); + end if; + return OK; + exception + when Program_Error => + return P_E; + when others => + return O_E; + end Nested; + + begin -- Never_Fails_Nest + S := Nested (Y); + end Never_Fails_Nest; + + ------------------------------------------------------------------ + + procedure Called_By_Never_Fails_Same + (X: access Desig; R: out Result_Kind) is + type Acc_Local is access all Desig; + AL : Acc_Local; + + -- Dereference of an access_to_object value is aliased. + Ren : Desig renames X.all; -- Renaming of a dereference + begin -- of an access parameter. + -- Ren'Access below will always be safe, since the accessibility + -- level (although not necessarily the static nesting depth) of + -- type of AL will always be deeper than or the same as that of the + -- actual corresponding to Y. + AL := Ren'Access; + if Ident_Int (AL(4)) /= 3 then --Avoid Optimization of AL + FAILED ("Initial Values not correct."); + end if; + R := OK; + exception + when Program_Error => + R := P_E; + when others => + R := O_E; + end Called_By_Never_Fails_Same; + + ------------------------------------------------------------------ + + procedure Never_Fails_Same (Y: access Desig; S: out Result_Kind) is + begin + Called_By_Never_Fails_Same (Y, S); + end Never_Fails_Same; + +end C3A2003_0; + + + --==================================================================-- + + +with C3A2003_0; +use C3A2003_0; + +with Report; use report; + +procedure C3A2003 is + + type Acc_L1 is access all Desig; -- Level = 1. + A1 : Acc_L1; + X1 : aliased Desig := (Desig'Range => Ident_Int(3)); + Res : Result_Kind; + + + procedure Called_By_Target_L1 (X: access Desig; R: out Result_Kind) is + begin + -- The accessibility level of the type of A1 is 1. + A1 := X.all'Access; + if IDENT_INT (A1(4)) /= 3 then --Avoid optimization of A1 + FAILED ("Initial values not correct."); + end if; + R := OK; + exception + when Program_Error => + R := P_E; + when others => + R := O_E; + end Called_By_Target_L1; + + ------------------------------------------------------------------ + + function Target_Is_Level_1_Same (Y: access Desig) return Result_Kind is + S : Result_Kind; + begin + Called_By_Target_L1 (Y, S); + return S; + end Target_Is_Level_1_Same; + + ------------------------------------------------------------------ + + procedure Display_Results (Result : in Result_Kind; + Expected: in Result_Kind; + Msg : in String) is + begin + if Result /= Expected then + case Result is + when OK => Report.Failed ("No exception raised: " & Msg); + when P_E => Report.Failed ("Program_Error raised: " & Msg); + when O_E => Report.Failed ("Unexpected exception raised: " & Msg); + end case; + end if; + end Display_Results; + +begin -- C3A2003 + + Report.Test ("C3A2003", "Check that, for X'Access of general access " & + "type A, Program_Error is raised if the accessibility " & + "level of X is deeper than that of A: X is an access " & + "parameter; corresponding actual is another access " & + "parameter"); + + + -- Accessibility level of actual is 0 (actual is X'Access): + + Never_Fails_Same (X0'Access, Res); + Display_Results (Res, OK, "Never_Fails_Same, level 0 actual"); + + Never_Fails_Nest (X0'Access, Res); + Display_Results (Res, OK, "Target_L1_Nest, level 0 actual"); + + Target_Is_Level_0_Nest (X0'Access, Res); + Display_Results (Res, OK, "Target_L0_Nest, level 0 actual"); + + Res := Target_Is_Level_1_Same (X0'Access); + Display_Results (Res, OK, "Target_L1_Same, level 0 actual"); + + + -- Accessibility level of actual is 1 (actual is X'Access): + + Never_Fails_Same (X1'Access, Res); + Display_Results (Res, OK, "Never_Fails_Same, level 1 actual"); + + Never_Fails_Nest (X1'Access, Res); + Display_Results (Res, OK, "Target_L1_Nest, level 1 actual"); + + Target_Is_Level_0_Nest (X1'Access, Res); + Display_Results (Res, P_E, "Target_L0_Nest, level 1 actual"); + + Res := Target_Is_Level_1_Same (X1'Access); + Display_Results (Res, OK, "Target_L1_Same, level 1 actual"); + + + Block_L2: + declare + X2 : aliased Desig := (Desig'Range => Ident_Int(3)); + type Acc_L2 is access all Desig; -- Level = 2. + Expr_L2 : Acc_L2 := X2'Access; + begin + + -- Accessibility level of actual is 2 (actual is expression of named + -- access type): + + Never_Fails_Same (Expr_L2, Res); + Display_Results (Res, OK, "Never_Fails_Same, level 2 actual"); + + Never_Fails_Nest (Expr_L2, Res); + Display_Results (Res, OK, "Target_L1_Nest, level 2 actual"); + + Target_Is_Level_0_Nest (Expr_L2, Res); + Display_Results (Res, P_E, "Target_L0_Nest, level 2 actual"); + + Res := Target_Is_Level_1_Same (Expr_L2); + Display_Results (Res, P_E, "Target_L1_Same, level 2 actual"); + + end Block_L2; + + Report.Result; + +end C3A2003; |