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111
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1 /* Test the Modern GNU Objective-C Runtime API.
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2
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3 This is test 'resolve-method', covering +resolveClassMethod: and
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4 +resolveInstanceMethod:. */
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5
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6 /* { dg-do run } */
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7 /* { dg-skip-if "" { *-*-* } { "-fnext-runtime" } { "" } } */
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8
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9 /* To get the modern GNU Objective-C Runtime API, you include
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10 objc/runtime.h. */
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11 #include <objc/runtime.h>
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12
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13 /* For __objc_msg_forward2. */
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14 #include <objc/message.h>
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15
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16 #include <stdlib.h>
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17 #include <stdio.h>
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18 #include <string.h>
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19
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20 @interface MyRootClass
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21 { Class isa; }
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22 + alloc;
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23 - init;
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24 @end
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25
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26 @implementation MyRootClass
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27 + alloc { return class_createInstance (self, 0); }
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28 - init { return self; }
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29 @end
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30
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31
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32 /* A number of tests will try invoking methods that don't exist. We
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33 want to record the fact, but not abort the program, so we supply
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34 our own fowarding implementation which will invoke the following
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35 function for any method that is not found. */
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36
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37 /* Keep track of how many times a non-existing method was executed. */
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38 static int nonExistingMethodCount = 0;
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39
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40 /* Inspired by nil_method in libobjc. */
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41 id nonExisting_method (id receiver __attribute__ ((__unused__)),
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42 SEL sel __attribute__ ((__unused__)))
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43 {
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44 nonExistingMethodCount++;
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45 return nil;
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46 }
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47
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48 /* Keep track of how many times the forwarding lookup was invoked. */
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49 static int forwardingCount = 0;
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50
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51 /* We install this forwarding hook to cause all failed method lookups
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52 to call our 'nonExisting_method' function. */
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53 IMP forward_everything_to_non_existing_method (id receiver __attribute__ ((__unused__)),
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54 SEL sel __attribute__ ((__unused__)))
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55 {
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56 forwardingCount++;
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57 return (IMP)nonExisting_method;
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58 }
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59
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60
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61 /* 'CountClass' is used to test that +resolveClassMethod: and
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62 +resolveInstanceMethod: are called when expected. They do nothing
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63 other than recording that they are called. */
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64 @interface CountClass : MyRootClass
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65 + (BOOL) resolveClassMethod: (SEL)selector;
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66 + (BOOL) resolveInstanceMethod: (SEL)selector;
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67 + (void) existingClassMethod;
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68 - (void) existingInstanceMethod;
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69 @end
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70
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71 /* Count how many times the methods are called for class
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72 'CountClass'. */
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73 static int resolveClassMethodCount = 0;
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74 static int resolveInstanceMethodCount = 0;
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75
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76 @implementation CountClass : MyRootClass
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77 + (BOOL) resolveClassMethod: (SEL)selector
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78 {
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79 resolveClassMethodCount++;
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80 return NO;
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81 }
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82 + (BOOL) resolveInstanceMethod: (SEL)selector
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83 {
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84 resolveInstanceMethodCount++;
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85 return NO;
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86 }
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87 + (void) existingClassMethod
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88 {
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89 return;
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90 }
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91 - (void) existingInstanceMethod
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92 {
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93 return;
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94 }
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95 @end
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96
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97 @protocol NonExistingStuff
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98 + (void) nonExistingClassMethod;
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99 - (void) nonExistingInstanceMethod;
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100 @end
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101
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102 /* Declare a category with some non existing methods, but don't
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103 actually implement them. */
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104 @interface CountClass (NonExistingStuff) <NonExistingStuff>
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105 @end
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106
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107
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108 /* 'SelfExtendingClass' is used to test that +resolveClassMethod: and
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109 +resolveInstanceMethod: can extend the class. Any time they are
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110 called, they install the requested method, mapping it to the same
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111 implementation as 'countHits'. */
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112 @interface SelfExtendingClass : MyRootClass
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113 + (int) countHits;
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114 + (BOOL) resolveClassMethod: (SEL)selector;
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115 + (BOOL) resolveInstanceMethod: (SEL)selector;
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116 @end
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117
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118 /* How many times the countHits method (or a clone) was called. */
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119 static int hitCount = 0;
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120
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121 @implementation SelfExtendingClass : MyRootClass
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122 + (int) countHits
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123 {
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124 hitCount++;
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125 return hitCount;
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126 }
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127 + (BOOL) resolveClassMethod: (SEL)selector
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128 {
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129 /* Duplicate the 'countHits' method into the new method. */
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130 Method method = class_getClassMethod (self, @selector (countHits));
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131 class_addMethod (object_getClass (self), selector,
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132 method_getImplementation (method),
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133 method_getTypeEncoding (method));
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134 resolveClassMethodCount++;
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135 return YES;
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136 }
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137 + (BOOL) resolveInstanceMethod: (SEL)selector
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138 {
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139 /* Duplicate the 'countHits' method into the new method. */
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140 Method method = class_getClassMethod (self, @selector (countHits));
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141 class_addMethod (self, selector,
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142 method_getImplementation (method),
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143 method_getTypeEncoding (method));
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144 resolveInstanceMethodCount++;
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145 return YES;
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146
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147 }
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148 @end
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149
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150 @protocol NonExistingStuff2
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151 + (int) nonExistingCountHitsMethod;
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152 - (int) nonExistingCountHitsMethod;
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153
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154 + (int) nonExistingCountHitsMethod2;
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155 - (int) nonExistingCountHitsMethod2;
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156
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157 + (int) nonExistingCountHitsMethod3;
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158 - (int) nonExistingCountHitsMethod3;
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159 @end
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160
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161 /* Declare a category with some non existing methods, but don't
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162 actually implement them. */
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163 @interface SelfExtendingClass (NonExistingStuff) <NonExistingStuff2>
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164 @end
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165
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166
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167 int main (int argc, void **args)
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168 {
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169 /* Functions are tested in alphabetical order. */
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170
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171 /* Install our test forwarding hook. */
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172 __objc_msg_forward2 = forward_everything_to_non_existing_method;
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173
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174 printf ("Testing [+resolveClassMethod:]...\n");
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175 {
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176 Method m;
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177 IMP i;
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178
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179 /** CountClass tests. **/
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180
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181 /* Call an existing method. No +resolveClassMethod and no
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182 forwarding should be triggered. */
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183 [CountClass existingClassMethod];
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184
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185 if (resolveClassMethodCount != 0)
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186 abort ();
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187
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188 if (forwardingCount != 0)
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189 abort ();
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190
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191 if (nonExistingMethodCount != 0)
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192 abort ();
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193
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194 /* Call a non-existing method. Both +resolveClassMethod and the
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195 forwarding should be triggered. */
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196 [CountClass nonExistingClassMethod];
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197
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198 if (resolveClassMethodCount != 1)
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199 abort ();
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200
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201 if (forwardingCount != 1)
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202 abort ();
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203
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204 if (nonExistingMethodCount != 1)
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205 abort ();
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206
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207 /* Now try the same tests with class_getClassMethod(), which
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208 should trigger the resolve methods too, but not the
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209 forwarding. */
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210 m = class_getClassMethod (objc_getClass ("CountClass"),
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211 @selector (existingClassMethod));
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212 if (resolveClassMethodCount != 1)
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213 abort ();
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214
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215 if (forwardingCount != 1)
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216 abort ();
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217
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218 if (nonExistingMethodCount != 1)
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219 abort ();
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220
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221 m = class_getClassMethod (objc_getClass ("CountClass"),
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222 @selector (nonExistingClassMethod));
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223 if (resolveClassMethodCount != 2)
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224 abort ();
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225
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226 if (forwardingCount != 1)
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227 abort ();
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228
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229 if (nonExistingMethodCount != 1)
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230 abort ();
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231
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232 /* Now try the same tests with class_getMethodImplementation(),
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233 which should trigger the resolve methods and the forwarding
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234 (but not execute the forwarding, obviously). */
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235 i = class_getMethodImplementation (object_getClass (objc_getClass ("CountClass")),
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236 @selector (existingClassMethod));
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237 if (resolveClassMethodCount != 2)
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238 abort ();
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239
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240 if (forwardingCount != 1)
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241 abort ();
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242
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243 if (nonExistingMethodCount != 1)
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244 abort ();
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245
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246 i = class_getMethodImplementation (object_getClass (objc_getClass ("CountClass")),
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247 @selector (nonExistingClassMethod));
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248 if (resolveClassMethodCount != 3)
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249 abort ();
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250
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251 if (forwardingCount != 2)
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252 abort ();
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253
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254 if (nonExistingMethodCount != 1)
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255 abort ();
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256
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257
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258 /* Reset the counters for the next test. */
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259 resolveClassMethodCount = 0;
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260 forwardingCount = 0;
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261 nonExistingMethodCount = 0;
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262
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263
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264 /** SelfExtendingClass tests. **/
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265
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266 /* Try the direct countHits method first. No resolving or
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267 forwarding should be triggered. */
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268 if ([SelfExtendingClass countHits] != 1)
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269 abort ();
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270
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271 if (resolveClassMethodCount != 0)
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272 abort ();
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273
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274 if (forwardingCount != 0)
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275 abort ();
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276
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277 if (nonExistingMethodCount != 0)
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278 abort ();
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279
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280 /* Now, try calling a non-existing count method; it should be
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281 installed and invoked. */
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282 if ([SelfExtendingClass nonExistingCountHitsMethod] != 2)
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283 abort ();
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284
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285 if (resolveClassMethodCount != 1)
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286 abort ();
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287
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288 if (forwardingCount != 0)
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289 abort ();
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290
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291 if (nonExistingMethodCount != 0)
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292 abort ();
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293
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294 /* Try it again. The method has now been installed, so it should
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295 be used and work, but with no additional resolving
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296 involved. */
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297 if ([SelfExtendingClass nonExistingCountHitsMethod] != 3)
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298 abort ();
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299
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300 if (resolveClassMethodCount != 1)
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301 abort ();
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302
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303 if (forwardingCount != 0)
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304 abort ();
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305
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306 if (nonExistingMethodCount != 0)
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307 abort ();
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308
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309
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310 /* Now try the same tests with class_getClassMethod(). */
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311 m = class_getClassMethod (objc_getClass ("SelfExtendingClass"),
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312 @selector (nonExistingCountHitsMethod2));
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313 if (resolveClassMethodCount != 2)
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314 abort ();
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315
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316 if (forwardingCount != 0)
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317 abort ();
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318
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319 if (nonExistingMethodCount != 0)
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320 abort ();
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321
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322 /* Try it again. The method has now been installed, so it should
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323 be used and work, but with no additional resolving
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324 involved. */
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325 if ([SelfExtendingClass nonExistingCountHitsMethod2] != 4)
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326 abort ();
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327
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328 if (resolveClassMethodCount != 2)
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329 abort ();
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330
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331 if (forwardingCount != 0)
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332 abort ();
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333
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334 if (nonExistingMethodCount != 0)
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335 abort ();
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336
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337
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338 /* Now try the same tests with class_getMethodImplementation(). */
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339 i = class_getMethodImplementation (object_getClass (objc_getClass ("SelfExtendingClass")),
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340 @selector (nonExistingCountHitsMethod3));
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341 if (resolveClassMethodCount != 3)
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342 abort ();
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343
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344 if (forwardingCount != 0)
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345 abort ();
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346
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347 if (nonExistingMethodCount != 0)
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348 abort ();
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349
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350 /* Try it again. The method has now been installed, so it should
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351 be used and work, but with no additional resolving
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352 involved. */
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353 if ([SelfExtendingClass nonExistingCountHitsMethod3] != 5)
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354 abort ();
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355
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356 if (resolveClassMethodCount != 3)
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357 abort ();
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358
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359 if (forwardingCount != 0)
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360 abort ();
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361
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362 if (nonExistingMethodCount != 0)
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363 abort ();
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364 }
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365
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366 /* Reset the counters for the next test. */
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367 nonExistingMethodCount = 0;
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368 forwardingCount = 0;
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369 hitCount = 0;
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370
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371 printf ("Testing [+resolveInstanceMethod:]...\n");
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372 {
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373 Method m;
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374 IMP i;
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375 CountClass *object = [[CountClass alloc] init];
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376 SelfExtendingClass *object2 = [[SelfExtendingClass alloc] init];
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377
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378 /** CountClass tests. **/
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379
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380 /* Call an existing method. No +resolveInstanceMethod and no
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381 forwarding should be triggered. */
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382 [object existingInstanceMethod];
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383
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384 if (resolveInstanceMethodCount != 0)
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385 abort ();
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386
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387 if (forwardingCount != 0)
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388 abort ();
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389
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390 if (nonExistingMethodCount != 0)
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391 abort ();
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392
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393 /* Call a non-existing method. Both +resolveInstanceMethod and the
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394 forwarding should be triggered. */
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395 [object nonExistingInstanceMethod];
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396
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397 if (resolveInstanceMethodCount != 1)
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398 abort ();
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399
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400 if (forwardingCount != 1)
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401 abort ();
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402
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403 if (nonExistingMethodCount != 1)
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404 abort ();
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405
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406 /* Now try the same tests with class_getInstanceMethod(), which
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407 should trigger the resolve methods too, but not the
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408 forwarding. */
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409 m = class_getInstanceMethod (objc_getClass ("CountClass"),
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410 @selector (existingInstanceMethod));
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411
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412 if (resolveInstanceMethodCount != 1)
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413 abort ();
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414
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415 if (forwardingCount != 1)
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416 abort ();
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417
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418 if (nonExistingMethodCount != 1)
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419 abort ();
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420
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421 m = class_getInstanceMethod (objc_getClass ("CountClass"),
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422 @selector (nonExistingInstanceMethod));
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423
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424 if (resolveInstanceMethodCount != 2)
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425 abort ();
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426
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427 if (forwardingCount != 1)
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428 abort ();
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429
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430 if (nonExistingMethodCount != 1)
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431 abort ();
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432
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433 /* Now try the same tests with class_getMethodImplementation(),
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434 which should trigger the resolve methods and the
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435 forwarding. */
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436 i = class_getMethodImplementation (objc_getClass ("CountClass"),
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437 @selector (existingInstanceMethod));
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438 if (resolveInstanceMethodCount != 2)
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439 abort ();
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440
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441 if (forwardingCount != 1)
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442 abort ();
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443
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444 if (nonExistingMethodCount != 1)
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445 abort ();
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446
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447 i = class_getMethodImplementation (objc_getClass ("CountClass"),
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448 @selector (nonExistingInstanceMethod));
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449 if (resolveInstanceMethodCount != 3)
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450 abort ();
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451
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452 if (forwardingCount != 2)
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453 abort ();
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454
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455 if (nonExistingMethodCount != 1)
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456 abort ();
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457
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458 /* Reset the counters for the next test. */
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459 resolveInstanceMethodCount = 0;
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460 forwardingCount = 0;
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461 nonExistingMethodCount = 0;
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462
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463
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464 /** SelfExtendingClass tests. **/
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465
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466 /* Try the direct countHits method first. No resolving or
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467 forwarding should be triggered. */
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468 if ([SelfExtendingClass countHits] != 1)
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469 abort ();
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470
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471 if (resolveInstanceMethodCount != 0)
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472 abort ();
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473
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474 if (forwardingCount != 0)
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475 abort ();
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476
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477 if (nonExistingMethodCount != 0)
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478 abort ();
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479
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480 /* Now, try calling a non-existing count method; it should be
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481 installed and invoked. */
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482 if ([object2 nonExistingCountHitsMethod] != 2)
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483 abort ();
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484
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485 if (resolveInstanceMethodCount != 1)
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486 abort ();
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487
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488 if (forwardingCount != 0)
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489 abort ();
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490
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491 if (nonExistingMethodCount != 0)
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492 abort ();
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493
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494 /* Try it again. The method has now been installed, so it should
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495 be used and work, but with no additional resolving
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496 involved. */
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497 if ([object2 nonExistingCountHitsMethod] != 3)
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498 abort ();
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|
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499
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|
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500 if (resolveInstanceMethodCount != 1)
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|
|
501 abort ();
|
|
|
502
|
|
|
503 if (forwardingCount != 0)
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|
|
504 abort ();
|
|
|
505
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506 if (nonExistingMethodCount != 0)
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|
|
507 abort ();
|
|
|
508
|
|
|
509 /* Now try the same tests with class_getInstanceMethod(). */
|
|
|
510 m = class_getInstanceMethod (objc_getClass ("SelfExtendingClass"),
|
|
|
511 @selector (nonExistingCountHitsMethod2));
|
|
|
512 if (resolveInstanceMethodCount != 2)
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|
|
513 abort ();
|
|
|
514
|
|
|
515 if (forwardingCount != 0)
|
|
|
516 abort ();
|
|
|
517
|
|
|
518 if (nonExistingMethodCount != 0)
|
|
|
519 abort ();
|
|
|
520
|
|
|
521 /* Try it again. The method has now been installed, so it should
|
|
|
522 be used and work, but with no additional resolving
|
|
|
523 involved. */
|
|
|
524 if ([object2 nonExistingCountHitsMethod2] != 4)
|
|
|
525 abort ();
|
|
|
526
|
|
|
527 if (resolveInstanceMethodCount != 2)
|
|
|
528 abort ();
|
|
|
529
|
|
|
530 if (forwardingCount != 0)
|
|
|
531 abort ();
|
|
|
532
|
|
|
533 if (nonExistingMethodCount != 0)
|
|
|
534 abort ();
|
|
|
535
|
|
|
536
|
|
|
537 /* Now try the same tests with class_getMethodImplementation(). */
|
|
|
538 i = class_getMethodImplementation (objc_getClass ("SelfExtendingClass"),
|
|
|
539 @selector (nonExistingCountHitsMethod3));
|
|
|
540 if (resolveInstanceMethodCount != 3)
|
|
|
541 abort ();
|
|
|
542
|
|
|
543 if (forwardingCount != 0)
|
|
|
544 abort ();
|
|
|
545
|
|
|
546 if (nonExistingMethodCount != 0)
|
|
|
547 abort ();
|
|
|
548
|
|
|
549 /* Try it again. The method has now been installed, so it should
|
|
|
550 be used and work, but with no additional resolving
|
|
|
551 involved. */
|
|
|
552 if ([object2 nonExistingCountHitsMethod3] != 5)
|
|
|
553 abort ();
|
|
|
554
|
|
|
555 if (resolveInstanceMethodCount != 3)
|
|
|
556 abort ();
|
|
|
557
|
|
|
558 if (forwardingCount != 0)
|
|
|
559 abort ();
|
|
|
560
|
|
|
561 if (nonExistingMethodCount != 0)
|
|
|
562 abort ();
|
|
|
563 }
|
|
|
564
|
|
|
565
|
|
|
566 return 0;
|
|
|
567 }
|
