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111
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1 -- CD30001.A
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2 --
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3 -- Grant of Unlimited Rights
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4 --
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5 -- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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6 -- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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7 -- unlimited rights in the software and documentation contained herein.
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8 -- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
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9 -- this public release, the Government intends to confer upon all
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10 -- recipients unlimited rights equal to those held by the Government.
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11 -- These rights include rights to use, duplicate, release or disclose the
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12 -- released technical data and computer software in whole or in part, in
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13 -- any manner and for any purpose whatsoever, and to have or permit others
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14 -- to do so.
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15 --
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16 -- DISCLAIMER
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17 --
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18 -- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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19 -- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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20 -- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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21 -- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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22 -- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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23 -- PARTICULAR PURPOSE OF SAID MATERIAL.
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24 --*
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25 --
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26 -- OBJECTIVE:
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27 -- Check that X'Address produces a useful result when X is an aliased
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28 -- object.
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29 -- Check that X'Address produces a useful result when X is an object of
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30 -- a by-reference type.
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31 -- Check that X'Address produces a useful result when X is an entity
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32 -- whose Address has been specified.
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33 --
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34 -- Check that aliased objects and subcomponents are allocated on storage
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35 -- element boundaries. Check that objects and subcomponents of by
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36 -- reference types are allocated on storage element boundaries.
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37 --
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38 -- Check that for an array X, X'Address points at the first component
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39 -- of the array, and not at the array bounds.
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40 --
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41 -- TEST DESCRIPTION:
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42 -- This test defines a data structure (an array of records) where each
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43 -- aspect of the data structure is aliased. The test checks 'Address
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44 -- for each "layer" of aliased objects.
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45 --
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46 -- APPLICABILITY CRITERIA:
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47 -- All implementations must attempt to compile this test.
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48 --
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49 -- For implementations validating against Systems Programming Annex (C):
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50 -- this test must execute and report PASSED.
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51 --
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52 -- For implementations not validating against Annex C:
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53 -- this test may report compile time errors at one or more points
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54 -- indicated by "-- ANX-C RQMT", in which case it may be graded as inapplicable.
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55 -- Otherwise, the test must execute and report PASSED.
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56 --
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57 --
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58 -- CHANGE HISTORY:
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59 -- 22 JUL 95 SAIC Initial version
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60 -- 08 MAY 96 SAIC Reinforced for 2.1
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61 -- 16 FEB 98 EDS Modified documentation
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62 --!
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63
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64 ----------------------------------------------------------------- CD30001_0
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65
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66 with SPPRT13;
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67 package CD30001_0 is
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68
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69 -- Check that X'Address produces a useful result when X is an aliased
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70 -- object.
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71 -- Check that X'Address produces a useful result when X is an object of
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72 -- a by-reference type.
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73 -- Check that X'Address produces a useful result when X is an entity
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74 -- whose Address has been specified.
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75 -- (using the new form of "for X'Address use ...")
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76 --
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77 -- Check that aliased objects and subcomponents are allocated on storage
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78 -- element boundaries. Check that objects and subcomponents of by
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79 -- reference types are allocated on storage element boundaries.
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80
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81 type Simple_Enum_Type is (Just, A, Little, Bit);
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82
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83 type Data is record
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84 Aliased_Comp_1 : aliased Simple_Enum_Type;
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85 Aliased_Comp_2 : aliased Simple_Enum_Type;
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86 end record;
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87
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88 type Array_W_Aliased_Comps is array(1..2) of aliased Data;
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89
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90 Aliased_Object : aliased Array_W_Aliased_Comps;
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91
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92 Specific_Object : aliased Array_W_Aliased_Comps;
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93 for Specific_Object'Address use SPPRT13.Variable_Address2; -- ANX-C RQMT.
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94
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95 procedure TC_Check_Aliased_Addresses;
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96
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97 procedure TC_Check_Specific_Addresses;
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98
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99 procedure TC_Check_By_Reference_Types;
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100
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101 end CD30001_0;
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102
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103 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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104
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105 with Report;
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106 with System.Storage_Elements;
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107 with System.Address_To_Access_Conversions;
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108 package body CD30001_0 is
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109
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110 package Simple_Enum_Type_Ref_Conv is
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111 new System.Address_To_Access_Conversions(Simple_Enum_Type);
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112
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113 package Data_Ref_Conv is new System.Address_To_Access_Conversions(Data);
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114
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115 package Array_W_Aliased_Comps_Ref_Conv is
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116 new System.Address_To_Access_Conversions(Array_W_Aliased_Comps);
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117
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118 use type System.Address;
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119 use type System.Storage_Elements.Integer_Address;
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120 use type System.Storage_Elements.Storage_Offset;
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121
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122 procedure TC_Check_Aliased_Addresses is
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123 use type Simple_Enum_Type_Ref_Conv.Object_Pointer;
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124 use type Data_Ref_Conv.Object_Pointer;
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125 use type Array_W_Aliased_Comps_Ref_Conv.Object_Pointer;
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126
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127 begin
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128
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129 -- Check the object Aliased_Object
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130
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131 if Aliased_Object'Address not in System.Address then
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132 Report.Failed("Aliased_Object'Address not an address");
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133 end if;
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134
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135 if Array_W_Aliased_Comps_Ref_Conv.To_Pointer(Aliased_Object'Address)
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136 /= Aliased_Object'Unchecked_Access then
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137 Report.Failed
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138 ("'Unchecked_Access does not match expected address value");
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139 end if;
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140
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141 -- Check the element Aliased_Object(1)
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142
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143 if Data_Ref_Conv.To_Address( Aliased_Object(1)'Access )
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144 /= Aliased_Object(1)'Address then
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145 Report.Failed
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146 ("Array element 'Access does not match expected address value");
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147 end if;
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148
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149 -- Check that Array'Address points at the first component...
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150
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151 if Array_W_Aliased_Comps_Ref_Conv.To_Address( Aliased_Object'Access )
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152 /= Aliased_Object(1)'Address then
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153 Report.Failed
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154 ("Address of array object does not equal address of first component");
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155 end if;
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156
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157 -- Check the components of Aliased_Object(2)
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158
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159 if Simple_Enum_Type_Ref_Conv.To_Address(
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160 Aliased_Object(2).Aliased_Comp_1'Unchecked_Access)
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161 not in System.Address then
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162 Report.Failed("Component 2 'Unchecked_Access not a valid address");
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163 end if;
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164
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165 if Aliased_Object(2).Aliased_Comp_2'Address not in System.Address then
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166 Report.Failed("Component 2 not located at a valid address ");
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167 end if;
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168
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169 end TC_Check_Aliased_Addresses;
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170
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171 procedure TC_Check_Specific_Addresses is
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172 use type System.Address;
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173 use type System.Storage_Elements.Integer_Address;
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174 use type Simple_Enum_Type_Ref_Conv.Object_Pointer;
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175 use type Data_Ref_Conv.Object_Pointer;
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176 use type Array_W_Aliased_Comps_Ref_Conv.Object_Pointer;
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177 begin
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178
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179 -- Check the object Specific_Object
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180
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181 if System.Storage_Elements.To_Integer(Specific_Object'Address)
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182 /= System.Storage_Elements.To_Integer(SPPRT13.Variable_Address2) then
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183 Report.Failed
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184 ("Specific_Object not at address specified in representation clause");
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185 end if;
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186
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187 if Array_W_Aliased_Comps_Ref_Conv.To_Pointer(SPPRT13.Variable_Address2)
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188 /= Specific_Object'Unchecked_Access then
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189 Report.Failed("Specific_Object'Unchecked_Access not expected value");
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190 end if;
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191
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192 -- Check the element Specific_Object(1)
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193
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194 if Data_Ref_Conv.To_Address( Specific_Object(1)'Access )
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195 /= Specific_Object(1)'Address then
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196 Report.Failed
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197 ("Specific Array element 'Access does not correspond to the "
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198 & "elements 'Address");
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199 end if;
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200
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201 -- Check that Array'Address points at the first component...
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202
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203 if Array_W_Aliased_Comps_Ref_Conv.To_Address( Specific_Object'Access )
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204 /= Specific_Object(1)'Address then
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205 Report.Failed
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206 ("Address of array object does not equal address of first component");
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207 end if;
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208
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209 -- Check the components of Specific_Object(2)
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210
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211 if Simple_Enum_Type_Ref_Conv.To_Address(
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212 Specific_Object(1).Aliased_Comp_1'Access)
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213 not in System.Address then
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214 Report.Failed("Access value of first record component for object at " &
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215 "specific address not a valid address");
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216 end if;
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217
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218 if Specific_Object(2).Aliased_Comp_2'Address not in System.Address then
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219 Report.Failed("Second record component for object at specific " &
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220 "address not located at a valid address");
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221 end if;
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222
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223 end TC_Check_Specific_Addresses;
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224
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225 -- Check that X'Address produces a useful result when X is an object of
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226 -- a by-reference type.
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227
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228 type Tagged_But_Not_Exciting is tagged record
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229 A_Bit_Of_Data : Boolean;
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230 end record;
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231
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232 Tagged_Object : Tagged_But_Not_Exciting;
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233
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234 procedure Muck_With_Addresses( It : in out Tagged_But_Not_Exciting;
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235 Its_Address : in System.Address ) is
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236 begin
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237 if It'Address /= Its_Address then
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238 Report.Failed("Address of object passed by reference does not " &
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239 "match address of object passed" );
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240 end if;
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241 end Muck_With_Addresses;
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242
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243 procedure TC_Check_By_Reference_Types is
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244 begin
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245 Muck_With_Addresses( Tagged_Object, Tagged_Object'Address );
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246 end TC_Check_By_Reference_Types;
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247
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248 end CD30001_0;
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249
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250 ------------------------------------------------------------------- CD30001
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251
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252 with Report;
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253 with CD30001_0;
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254 procedure CD30001 is
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255
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256 begin -- Main test procedure.
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257
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258 Report.Test ("CD30001",
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259 "Check that X'Address produces a useful result when X is " &
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260 "an aliased object, or an entity whose Address has been " &
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261 "specified" );
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262
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263 -- Check that X'Address produces a useful result when X is an aliased
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264 -- object.
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265 --
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266 -- Check that aliased objects and subcomponents are allocated on storage
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267 -- element boundaries. Check that objects and subcomponents of by
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268 -- reference types are allocated on storage element boundaries.
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269
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270 CD30001_0.TC_Check_Aliased_Addresses;
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271
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272 -- Check that X'Address produces a useful result when X is an entity
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273 -- whose Address has been specified.
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274
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275 CD30001_0.TC_Check_Specific_Addresses;
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276
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277 -- Check that X'Address produces a useful result when X is an object of
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278 -- a by-reference type.
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279
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280 CD30001_0.TC_Check_By_Reference_Types;
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281
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282 Report.Result;
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283
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284 end CD30001;
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