test/layout.m

   1 // TEST_CONFIG MEM=gc SDK=macos
   2
   3 #include "test.h"
   4 #include <string.h>
   5 #include <objc/objc-runtime.h>
   6
   7 @class NSObject;
   8
   9 void printlayout(const char *name, const uint8_t *layout)
  10 {
  11     testprintf("%s: ", name);
  12
  13     if (!layout) {
  14         testprintf("NULL\n");
  15         return;
  16     }
  17
  18     const uint8_t *c;
  19     for (c = layout; *c; c++) {
  20         testprintf("%02x ", *c);
  21     }
  22
  23     testprintf("00\n");
  24 }
  25
  26
  27 @interface Super { id isa; } @end
  28 @implementation Super @end
  29
  30
  31 // strong: 0c 00  (0a00 without structs)
  32 // weak: NULL
  33 @interface AllScanned : Super {
  34     id id1;
  35     NSObject *o1;
  36     __strong void *v1;
  37     __strong intptr_t *i1;
  38     __strong long *l1;
  39     /* fixme
  40     struct {
  41         id id1;
  42         id id2;
  43     } str;
  44     */
  45     id arr1[4];
  46 }
  47 @end
  48 @implementation AllScanned @end
  49
  50 // strong: 00
  51 // weak: 1b 00 (18 00 without structs)
  52 @interface AllWeak : Super {
  53     __weak id id1;
  54     __weak NSObject *o1;
  55     __weak void *v1;
  56     __weak intptr_t *i1;
  57     __weak long *l1;
  58     /* fixme
  59     struct {
  60         __weak id id1;
  61         __weak id id2;
  62     } str;
  63     */
  64     __weak id arr1[4];
  65 }
  66 @end
  67 @implementation AllWeak @end
  68
  69 // strong: ""
  70 // weak: NULL
  71 @interface NoScanned { long i;  } @end
  72 @implementation NoScanned @end
  73
  74 int main()
  75 {
  76     const uint8_t *layout;
  77
  78     layout = class_getIvarLayout(objc_getClass("AllScanned"));
  79     printlayout("AllScanned", layout);
  80     layout = class_getWeakIvarLayout(objc_getClass("AllScanned"));
  81     printlayout("AllScanned weak", layout);
  82     // testassert(0 == strcmp(layout, "\x0a"));
  83
  84     layout = class_getIvarLayout(objc_getClass("AllWeak"));
  85     printlayout("AllWeak", layout);
  86     layout = class_getWeakIvarLayout(objc_getClass("AllWeak"));
  87     printlayout("AllWeak weak", layout);
  88     // testassert(0 == strcmp(layout, ""));
  89
  90     layout = class_getIvarLayout(objc_getClass("NoScanned"));
  91     printlayout("NoScanned", layout);
  92     // testassert(0 == strcmp(layout, ""));
  93
  94     succeed(__FILE__);
  95     return 0;
  96 }