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111
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1 -- CXH3001.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 pragma Reviewable.
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28 -- Check that pragma Reviewable is accepted as a configuration pragma.
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29 --
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30 -- TEST DESCRIPTION
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31 -- The test requires that the configuration pragma Reviewable
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32 -- be processed. The following package contains a simple "one of each
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33 -- construct in the language" to check that the configuration pragma has
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34 -- not disallowed some feature of the language. This test should generate
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35 -- no errors.
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36 --
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37 -- APPLICABILITY CRITERIA:
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38 -- This test is only applicable for a compiler attempting validation
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39 -- for the Safety and Security Annex.
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40 --
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41 -- PASS/FAIL CRITERIA:
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42 -- This test passes if it correctly compiles, executes, and reports PASS.
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43 -- It fails if the pragma is rejected. The effect of the pragma should
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44 -- be to produce a listing with information, including warnings, as
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45 -- required in H.3.1. Specific form and contents of this listing are not
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46 -- required by this test and are not part of the PASS/FAIL criteria.
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47 --
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48 -- SPECIAL REQUIREMENTS
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49 -- The implementation must process a configuration pragma which is not
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50 -- part of any Compilation Unit; the method employed is implementation
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51 -- defined.
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52 --
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53 -- Pragma Reviewable requires that the implementation provide the
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54 -- following information for the compilation units in this test:
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55 --
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56 -- o Where compiler-generated run-time checks remain (6)
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57 --
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58 -- o Identification of any construct with a language-defined check
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59 -- that is recognized prior to runtime as certain to fail if
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60 -- executed (7)
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61 --
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62 -- o For each reference to a scalar object, an identification of
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63 -- the reference as either "known to be initialized,"
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64 -- or "possibly uninitialized" (8)
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65 --
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66 -- o Where run-time support routines are implicitly invoked (9)
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67 --
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68 -- o An object code listing including: (10)
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69 --
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70 -- o Machine instructions with relative offsets (11)
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71 --
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72 -- o Where each data object is stored during its lifetime (12)
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73 --
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74 -- o Correspondence with the source program (13)
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75 --
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76 -- o Identification of each construct for which the implementation
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77 -- detects the possibility of erroneous execution (14)
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78 --
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79 -- o For each subprogram, block, task or other construct implemented by
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80 -- reserving and subsequently freezing an area of the run-time stack,
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81 -- an identification of the length of the fixed-size portion of
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82 -- the area and an indication of whether the non-fixed size portion
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83 -- is reserved on the stack or in a dynamically managed storage
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84 -- region (15)
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85 --
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86 --
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87 -- CHANGE HISTORY:
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88 -- 26 OCT 95 SAIC Initial version
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89 -- 12 NOV 96 SAIC Revised for 2.1
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90 -- 27 AUG 99 RLB Removed result dependence on uninitialized object.
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91 -- 30 AUG 99 RLB Repaired the above.
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92 --
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93 --!
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94
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95 ---------------------------- CONFIGURATION PRAGMAS -----------------------
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96
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97 pragma Reviewable; -- OK
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98 -- configuration pragma
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99
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100 ------------------------ END OF CONFIGURATION PRAGMAS --------------------
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101
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102
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103 ----------------------------------------------------------------- CXH3001_0
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104
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105 package CXH3001_0 is
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106
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107 type Enum is (Item,Stuff,Things);
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108
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109 type Int is range 0..256;
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110
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111 type Unt is mod 256;
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112
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113 type Flt is digits 5;
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114
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115 type Fix is delta 0.5 range -1.0..1.0;
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116
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117 type Root(Disc: Enum) is tagged record
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118 I: Int; U:Unt;
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119 end record;
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120
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121 type List is array(Unt) of Root(Stuff);
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122
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123 type A_List is access List;
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124 type A_Proc is access procedure(R:Root);
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125
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126 procedure P(R:Root);
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127
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128 function F return A_Proc;
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129
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130 protected PT is
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131 entry Set(Switch: Boolean);
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132 function Enquire return Boolean;
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133 private
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134 Toggle : Boolean;
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135 end PT;
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136
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137 task TT is
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138 entry Release;
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139 end TT;
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140
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141 Global_Variable : Boolean := False;
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142
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143 end CXH3001_0;
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144
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145 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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146
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147 with Report;
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148 package body CXH3001_0 is
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149
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150 procedure P(R:Root) is
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151 Warnable : Positive := 0; -- (7) -- OPTIONAL WARNING
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152 -- this would raise Constraint_Error if P were ever called, however
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153 -- this test never calls P.
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154 begin
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155 case R.Disc is
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156 when Item => Report.Comment("Got Item");
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157 when Stuff => Report.Comment("Got Stuff");
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158 when Things => Report.Comment("Got Things");
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159 end case;
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160 if Report.Ident_Int( Warnable ) = 0 then
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161 Global_Variable := not Global_Variable; -- (8) known to be initialized
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162 end if;
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163 end P;
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164
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165 function F return A_Proc is
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166 begin
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167 return P'Access;
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168 end F;
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169
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170 protected body PT is
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171
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172 entry Set(Switch: Boolean) when True is
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173 begin
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174 Toggle := Switch;
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175 end Set;
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176
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177 function Enquire return Boolean is
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178 begin
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179 return Toggle;
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180 end Enquire;
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181
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182 end PT;
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183
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184 task body TT is
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185 begin
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186 loop
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187 accept Release;
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188 exit when Global_Variable;
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189 end loop;
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190 end TT;
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191
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192 -- (9) TT activation
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193 end CXH3001_0;
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194
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195 ------------------------------------------------------------------- CXH3001
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196
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197 with Report;
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198 with CXH3001_0;
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199 procedure CXH3001 is
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200 begin
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201 Report.Test("CXH3001", "Check pragma Reviewable as a configuration pragma");
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202
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203 Block: declare
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204 A_Truth : Boolean;
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205 Message : String := Report.Ident_Str( "Bad value encountered" );
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206 begin
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207 begin
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208 A_Truth := Report.Ident_Bool( True ) or A_Truth; -- (8) not initialized
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209 if not A_Truth then
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210 Report.Comment ("True or Uninit = False");
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211 A_Truth := Report.Ident_Bool (True);
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212 else
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213 A_Truth := Report.Ident_Bool (True);
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214 -- We do this separately on each branch in order to insure that a
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215 -- clever optimizer can find out little about this value. Ident_Bool
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216 -- is supposed to be opaque to any optimizer.
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217 end if;
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218 exception
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219 when Constraint_Error | Program_Error =>
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220 -- Possible results of accessing an uninitialized object.
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221 A_Truth := Report.Ident_Bool (True);
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222 end;
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223
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224 CXH3001_0.PT.Set( A_Truth );
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225
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226 CXH3001_0.Global_Variable := A_Truth;
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227
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228 CXH3001_0.TT.Release; -- (9) rendezvous with TT
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229
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230 while CXH3001_0.TT'Callable loop
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231 delay 1.0; -- wait for TT to become non-callable
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232 end loop;
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233
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234 if not CXH3001_0.PT.Enquire
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235 or not CXH3001_0.Global_Variable
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236 or CXH3001_0.TT'Callable then
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237 Report.Failed(Message);
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238 end if;
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239
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240 end Block;
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241
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242 Report.Result;
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243 end CXH3001;
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