test/layout.m

   1 #include "test.h"
   2 #include <string.h>
   3 #include <objc/objc-runtime.h>
   4
   5 @class NSObject;
   6
   7 void printlayout(const char *name, const char *layout)
   8 {
   9     testprintf("%s: ", name);
  10
  11     if (!layout) {
  12         testprintf("NULL\n");
  13         return;
  14     }
  15
  16     const char *c;
  17     for (c = layout; *c; c++) {
  18         testprintf("%02x ", *c);
  19     }
  20
  21     testprintf("00\n");
  22 }
  23
  24
  25 @interface Super { id isa; } @end
  26 @implementation Super @end
  27
  28
  29 // strong: 0c 00  (0a00 without structs)
  30 // weak: NULL
  31 @interface AllScanned : Super {
  32     id id1;
  33     NSObject *o1;
  34     __strong void *v1;
  35     __strong intptr_t i1;
  36     __strong long l1;
  37     /* fixme
  38     struct {
  39         id id1;
  40         id id2;
  41     } str;
  42     */
  43     id arr1[4];
  44 }
  45 @end
  46 @implementation AllScanned @end
  47
  48 // strong: 00
  49 // weak: 1b 00 (18 00 without structs)
  50 @interface AllWeak : Super {
  51     __weak id id1;
  52     __weak NSObject *o1;
  53     __weak void *v1;
  54     __weak intptr_t i1;
  55     __weak long l1;
  56     /* fixme
  57     struct {
  58         __weak id id1;
  59         __weak id id2;
  60     } str;
  61     */
  62     __weak id arr1[4];
  63 }
  64 @end
  65 @implementation AllWeak @end
  66
  67 // strong: ""
  68 // weak: NULL
  69 @interface NoScanned { long i;  } @end
  70 @implementation NoScanned @end
  71
  72 int main()
  73 {
  74     const char *layout;
  75
  76     layout = class_getIvarLayout(objc_getClass("AllScanned"));
  77     printlayout("AllScanned", layout);
  78     layout = class_getWeakIvarLayout(objc_getClass("AllScanned"));
  79     printlayout("AllScanned weak", layout);
  80     // testassert(0 == strcmp(layout, "\x0a"));
  81
  82     layout = class_getIvarLayout(objc_getClass("AllWeak"));
  83     printlayout("AllWeak", layout);
  84     layout = class_getWeakIvarLayout(objc_getClass("AllWeak"));
  85     printlayout("AllWeak weak", layout);
  86     // testassert(0 == strcmp(layout, ""));
  87
  88     layout = class_getIvarLayout(objc_getClass("NoScanned"));
  89     printlayout("NoScanned", layout);
  90     // testassert(0 == strcmp(layout, ""));
  91
  92     succeed(__FILE__);
  93     return 0;
  94 }