test/instanceSize.m

   1 // TEST_CONFIG
   2
   3 #include "test.h"
   4 #include "testroot.i"
   5 #include <objc/runtime.h>
   6
   7
   8 @interface Sub1 : TestRoot {
   9     // id isa;  // 0..4
  10     BOOL b;     // 4..5
  11 }
  12 @end
  13
  14 @implementation Sub1 @end
  15
  16 @interface Sub2 : Sub1 {
  17     // id isa   // 0..4    0..8
  18     // BOOL b   // 4..5    8..9
  19     BOOL b2;    // 5..6    9..10
  20     id o;       // 8..12   16..24
  21 }
  22 @end
  23 @implementation Sub2 @end
  24
  25 @interface Sub3 : Sub1 {
  26     // id isa;  // 0..4    0..8
  27     // BOOL b;  // 4..5    8..9
  28     id o;       // 8..12   16..24
  29     BOOL b2;    // 12..13  24..25
  30 }
  31 @end
  32 @implementation Sub3 @end
  33
  34 int main()
  35 {
  36     testassert(sizeof(id) == class_getInstanceSize([TestRoot class]));
  37     testassert(2*sizeof(id) == class_getInstanceSize([Sub1 class]));
  38     testassert(3*sizeof(id) == class_getInstanceSize([Sub2 class]));
  39     testassert(4*sizeof(id) == class_getInstanceSize([Sub3 class]));
  40
  41 #if !__has_feature(objc_arc)
  42     id o;
  43
  44     o = [TestRoot new];
  45     testassert(object_getIndexedIvars(o) == (char *)o + class_getInstanceSize(object_getClass(o)));
  46     RELEASE_VAR(o);
  47     o = [Sub1 new];
  48     testassert(object_getIndexedIvars(o) == (char *)o + class_getInstanceSize(object_getClass(o)));
  49     RELEASE_VAR(o);
  50     o = [Sub2 new];
  51     testassert(object_getIndexedIvars(o) == (char *)o + class_getInstanceSize(object_getClass(o)));
  52     RELEASE_VAR(o);
  53     o = [Sub3 new];
  54     testassert(object_getIndexedIvars(o) == (char *)o + class_getInstanceSize(object_getClass(o)));
  55     RELEASE_VAR(o);
  56 #endif
  57
  58     succeed(__FILE__);
  59 }