summaryrefslogtreecommitdiff
path: root/gcc/testsuite/ada/acats/tests/c7/c761002.a
blob: 5b807bba720ad3cc8b4b0845f33dd704a3e6c00e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
-- C761002.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 objects of a controlled type that are created
--      by an allocator are finalized at the appropriate time.  In 
--      particular, check that such objects are not finalized due to 
--      completion of the master in which they were allocated if the 
--      corresponding access type is declared outside of that master.
--
--      Check that Unchecked_Deallocation of a controlled 
--      object causes finalization of that object.
--
-- TEST DESCRIPTION:
--      This test derives a type from Ada.Finalization.Controlled, and
--      declares access types to that type in various scope scenarios.
--      The dispatching procedure Finalize is redefined for the derived
--      type to perform a check that it has been called at the 
--      correct time.  This is accomplished using a global variable 
--      which indicates what state the software is currently 
--      executing.  The test utilizes the TCTouch facilities to 
--      verify that Finalize is called the correct number of times, at 
--      the correct times.  Several calls are made to validate passing 
--      the null string to check that Finalize has NOT been called at 
--      that point.
--
--
-- CHANGE HISTORY:
--      06 Dec 94   SAIC    ACVC 2.0
--
--!

with Ada.Finalization;
package C761002_0 is
  type Global is new Ada.Finalization.Controlled with null record;
  procedure Finalize( It: in out Global );
  
  type Second is new Ada.Finalization.Limited_Controlled with null record;
  procedure Finalize( It: in out Second );
end C761002_0;

with Report;
with TCTouch;
package body C761002_0 is

  procedure Finalize( It: in out Global ) is
  begin
    TCTouch.Touch('F');  ------------------------------------------------- F
  end Finalize;

  procedure Finalize( It: in out Second ) is
  begin
    TCTouch.Touch('S');  ------------------------------------------------- S
  end Finalize;
end C761002_0;

with Report;
with TCTouch;
with C761002_0;
with Unchecked_Deallocation;
procedure C761002 is

  -- check the straightforward case
  procedure Subtest_1 is
    type Access_1 is access C761002_0.Global;
    V1 : Access_1;
    procedure Allocate is
      V2 : Access_1;
    begin
      V2 := new C761002_0.Global;
      V1 := V2;  -- "dead" assignment must not be optimized away due to
                 -- finalization "side effects", many more of these follow
    end Allocate;
  begin
    Allocate;
    -- no calls to Finalize should have occurred at this point
    TCTouch.Validate("","Allocated nested, retained");
  end Subtest_1;
  
  -- check Unchecked_Deallocation
  procedure Subtest_2 is
    type Access_2 is access C761002_0.Global;
    procedure Free is
              new Unchecked_Deallocation(C761002_0.Global, Access_2);
    V1 : Access_2;
    V2 : Access_2;

    procedure Allocate is
    begin
      V1 := new C761002_0.Global;
      V2 := new C761002_0.Global;
    end Allocate;

  begin
    Allocate;
    -- no calls to Finalize should have occurred at this point.
    TCTouch.Validate("","Allocated nested, non-local");
    
    Free(V1); -- instance of Unchecked_Deallocation
    -- should cause the finalization of V1.all
    TCTouch.Validate("F","Unchecked Deallocation");
  end Subtest_2; -- leaving this scope should cause the finalization of V2.all
  
  -- check various master-exit scenarios
  -- the "Fake" parameters are used to avoid unwanted optimizations
  procedure Subtest_3 is
    procedure With_Local_Block is
      type Access_3 is access C761002_0.Global;
      V1 : Access_3;
    begin
      declare
        V2 : Access_3 := new C761002_0.Global;
      begin
        V1 := V2;
      end;
      TCTouch.Validate("","Local Block, normal exit");
      -- the allocated object should be finalized on leaving this scope
    end With_Local_Block;
    
    procedure With_Local_Block_Return(Fake: Integer) is
      type Access_4 is access C761002_0.Global;
      V1 : Access_4 := new C761002_0.Global;
    begin
      if Fake = 0 then
        declare
          V2 : Access_4;
        begin
          V2 := new C761002_0.Global;
          return; -- the two allocated objects should be finalized
        end;      -- upon leaving this scope
      else
        V1 := null;
      end if;
    end With_Local_Block_Return;

    procedure With_Goto(Fake: Integer) is
      type Access_5 is access C761002_0.Global;
      V1 : Access_5 := new C761002_0.Global;
      V2 : Access_5;
      V3 : Access_5;
    begin
      if Fake = 0 then
        declare
          type Access_6 is access C761002_0.Second;
          V6 : Access_6;
        begin
          V6 := new C761002_0.Second;
          goto check;
        end;
      else
        V2 := V1;
      end if;
      V3 := V2;
<<check>>
      TCTouch.Validate("S","goto past master end");
     end With_Goto;

  begin
    With_Local_Block;
    TCTouch.Validate("F","Local Block, normal exit, after master");

    With_Local_Block_Return( Report.Ident_Int(0) );
    TCTouch.Validate("FF","Local Block, return from block");

    With_Goto( Report.Ident_Int(0) );
    TCTouch.Validate("F","With Goto");

  end Subtest_3;

  procedure Subtest_4 is

    Oops : exception;
    
    procedure Alley( Fake: Integer ) is
      type Access_1 is access C761002_0.Global;
      V1 : Access_1;
    begin
      V1 := new C761002_0.Global;
      if Fake = 1 then
        raise Oops;
      end if;
      V1 := null;
    end Alley;
  
  begin
    Catch: begin
      Alley( Report.Ident_Int(1) );
    exception
      when Oops   => TCTouch.Validate("F","leaving via exception");
      when others => Report.Failed("Wrong exception");
    end Catch;
  end Subtest_4;

begin  -- Main test procedure.

  Report.Test ("C761002", "Check that objects of a controlled type created "
                        & "by an allocator are finalized appropriately. " 
                        & "Check that Unchecked_Deallocation of a "
                        & "controlled object causes finalization " 
                        & "of that object" );
  
  Subtest_1;
  -- leaving the scope of the access type should finalize the 
  -- collection
  TCTouch.Validate("F","Allocated nested, Subtest 1");
  
  Subtest_2;
  -- Unchecked_Deallocation already finalized one of the two 
  -- objects allocated, the other should be the only one finalized 
  -- at leaving the scope of the access type.
  TCTouch.Validate("F","Allocated non-local");

  Subtest_3;
  -- there should be no remaining finalizations from this subtest
  TCTouch.Validate("","Localized objects");

  Subtest_4;
  -- there should be no remaining finalizations from this subtest
  TCTouch.Validate("","Exception testing");

  Report.Result;

end C761002;