test/swift-class-def.m

   1 #include <sys/cdefs.h>
   2
   3 #if __LP64__
   4 #   define PTR " .quad "
   5 #   define PTRSIZE "8"
   6 #   define LOGPTRSIZE "3"
   7 #   define ONLY_LP64(x) x
   8 #else
   9 #   define PTR " .long "
  10 #   define PTRSIZE "4"
  11 #   define LOGPTRSIZE "2"
  12 #   define ONLY_LP64(x)
  13 #endif
  14
  15 #if __has_feature(ptrauth_calls)
  16 #   define SIGNED_METHOD_LIST_IMP "@AUTH(ia,0,addr) "
  17 #   define SIGNED_STUB_INITIALIZER "@AUTH(ia,0xc671,addr) "
  18 #else
  19 #   define SIGNED_METHOD_LIST_IMP
  20 #   define SIGNED_STUB_INITIALIZER
  21 #endif
  22
  23 #define str(x) #x
  24 #define str2(x) str(x)
  25
  26 // Swift metadata initializers. Define these in the test.
  27 EXTERN_C Class initSuper(Class cls, void *arg);
  28 EXTERN_C Class initSub(Class cls, void *arg);
  29
  30 @interface SwiftSuper : NSObject @end
  31 @interface SwiftSub : SwiftSuper @end
  32
  33 __BEGIN_DECLS
  34 // not id to avoid ARC operations because the class doesn't implement RR methods
  35 void* nop(void* self) { return self; }
  36 __END_DECLS
  37
  38 #define SWIFT_CLASS(name, superclass, swiftInit) \
  39 asm(                                               \
  40     ".globl _OBJC_CLASS_$_" #name             "\n" \
  41     ".section __DATA,__objc_data               \n" \
  42     ".align 3                                  \n" \
  43     "_OBJC_CLASS_$_" #name ":                  \n" \
  44     PTR "_OBJC_METACLASS_$_" #name            "\n" \
  45     PTR "_OBJC_CLASS_$_" #superclass          "\n" \
  46     PTR "__objc_empty_cache                    \n" \
  47     PTR "0 \n"                                     \
  48     PTR "L_" #name "_ro + 2 \n"                    \
  49     /* Swift class fields. */                      \
  50     ".long 0 \n"   /* flags */                     \
  51     ".long 0 \n"   /* instanceAddressOffset */     \
  52     ".long 16 \n"  /* instanceSize */              \
  53     ".short 15 \n" /* instanceAlignMask */         \
  54     ".short 0 \n"  /* reserved */                  \
  55     ".long 256 \n" /* classSize */                 \
  56     ".long 0 \n"   /* classAddressOffset */        \
  57     PTR "0 \n"     /* description */               \
  58     /* pad to OBJC_MAX_CLASS_SIZE */               \
  59     PTR "0 \n"                                     \
  60     PTR "0 \n"                                     \
  61     PTR "0 \n"                                     \
  62     PTR "0 \n"                                     \
  63     PTR "0 \n"                                     \
  64     PTR "0 \n"                                     \
  65     PTR "0 \n"                                     \
  66     PTR "0 \n"                                     \
  67     PTR "0 \n"                                     \
  68     PTR "0 \n"                                     \
  69     PTR "0 \n"                                     \
  70     PTR "0 \n"                                     \
  71     PTR "0 \n"                                     \
  72     PTR "0 \n"                                     \
  73     PTR "0 \n"                                     \
  74     PTR "0 \n"                                     \
  75     PTR "0 \n"                                     \
  76     PTR "0 \n"                                     \
  77     PTR "0 \n"                                     \
  78     PTR "0 \n"                                     \
  79     PTR "0 \n"                                     \
  80     PTR "0 \n"                                     \
  81     PTR "0 \n"                                     \
  82     PTR "0 \n"                                     \
  83                                                    \
  84     "_OBJC_METACLASS_$_" #name ":              \n" \
  85     PTR "_OBJC_METACLASS_$_" #superclass      "\n" \
  86     PTR "_OBJC_METACLASS_$_" #superclass      "\n" \
  87     PTR "__objc_empty_cache                    \n" \
  88     PTR "0 \n"                                     \
  89     PTR "L_" #name "_meta_ro \n"                   \
  90     /* pad to OBJC_MAX_CLASS_SIZE */               \
  91     PTR "0 \n"                                     \
  92     PTR "0 \n"                                     \
  93     PTR "0 \n"                                     \
  94     PTR "0 \n"                                     \
  95     PTR "0 \n"                                     \
  96     PTR "0 \n"                                     \
  97     PTR "0 \n"                                     \
  98     PTR "0 \n"                                     \
  99     PTR "0 \n"                                     \
 100     PTR "0 \n"                                     \
 101     PTR "0 \n"                                     \
 102     PTR "0 \n"                                     \
 103     PTR "0 \n"                                     \
 104     PTR "0 \n"                                     \
 105     PTR "0 \n"                                     \
 106     PTR "0 \n"                                     \
 107     PTR "0 \n"                                     \
 108     PTR "0 \n"                                     \
 109     PTR "0 \n"                                     \
 110     PTR "0 \n"                                     \
 111     PTR "0 \n"                                     \
 112     PTR "0 \n"                                     \
 113     PTR "0 \n"                                     \
 114     PTR "0 \n"                                     \
 115     PTR "0 \n"                                     \
 116     PTR "0 \n"                                     \
 117     PTR "0 \n"                                     \
 118                                                    \
 119     "L_" #name "_ro: \n"                           \
 120     ".long (1<<6) \n"                              \
 121     ".long 0 \n"                                   \
 122     ".long " PTRSIZE " \n"                         \
 123     ONLY_LP64(".long 0 \n")                        \
 124     PTR "0 \n"                                     \
 125     PTR "L_" #name "_name \n"                      \
 126     PTR "L_" #name "_methods \n"                   \
 127     PTR "0 \n"                                     \
 128     PTR "L_" #name "_ivars \n"                     \
 129     PTR "0 \n"                                     \
 130     PTR "0 \n"                                     \
 131     PTR "_" #swiftInit SIGNED_METHOD_LIST_IMP "\n" \
 132                                                    \
 133     "L_" #name "_meta_ro: \n"                      \
 134     ".long 1 \n"                                   \
 135     ".long 40 \n"                                  \
 136     ".long 40 \n"                                  \
 137     ONLY_LP64(".long 0 \n")                        \
 138     PTR "0 \n"                                     \
 139     PTR "L_" #name "_name \n"                      \
 140     PTR "L_" #name "_meta_methods \n"              \
 141     PTR "0 \n"                                     \
 142     PTR "0 \n"                                     \
 143     PTR "0 \n"                                     \
 144     PTR "0 \n"                                     \
 145                                                    \
 146     "L_" #name "_methods: \n"                      \
 147     "L_" #name "_meta_methods: \n"                 \
 148     ".long 3*" PTRSIZE "\n"                        \
 149     ".long 1 \n"                                   \
 150     PTR "L_" #name "_self \n"                      \
 151     PTR "L_" #name "_self \n"                      \
 152     PTR "_nop" SIGNED_METHOD_LIST_IMP "\n"         \
 153                                                    \
 154     "L_" #name "_ivars: \n"                        \
 155     ".long 4*" PTRSIZE " \n"                       \
 156     ".long 1 \n"                                   \
 157     PTR "L_" #name "_ivar_offset \n"               \
 158     PTR "L_" #name "_ivar_name \n"                 \
 159     PTR "L_" #name "_ivar_type \n"                 \
 160     ".long " LOGPTRSIZE "\n"                       \
 161     ".long " PTRSIZE "\n"                          \
 162                                                    \
 163     "L_" #name "_ivar_offset: \n"                  \
 164     ".long 0 \n"                                   \
 165                                                    \
 166     ".cstring \n"                                  \
 167     "L_" #name "_name: .ascii \"" #name "\\0\" \n" \
 168     "L_" #name "_self: .ascii \"self\\0\" \n"      \
 169     "L_" #name "_ivar_name: "                      \
 170     "  .ascii \"" #name "_ivar\\0\" \n"            \
 171     "L_" #name "_ivar_type: .ascii \"c\\0\" \n"    \
 172                                                    \
 173                                                    \
 174     ".text \n"                                     \
 175 );                                                 \
 176 extern char OBJC_CLASS_$_ ## name;                 \
 177 Class Raw ## name = (Class)&OBJC_CLASS_$_ ## name
 178
 179 #define SWIFT_STUB_CLASSREF(name)  \
 180 extern char OBJC_CLASS_$_ ## name; \
 181 static Class name ## Classref = (Class)(&OBJC_CLASS_$_ ## name + 1)
 182
 183 #define SWIFT_STUB_CLASS(name, initializer)        \
 184 asm(                                               \
 185     ".globl _OBJC_CLASS_$_" #name "\n"             \
 186     ".section __DATA,__objc_data \n"               \
 187     ".align 3 \n"                                  \
 188     "_dummy" #name ": \n"                          \
 189     PTR "0 \n"                                     \
 190     ".alt_entry _OBJC_CLASS_$_" #name "\n"         \
 191     "_OBJC_CLASS_$_" #name ": \n"                  \
 192     PTR "1 \n"                                     \
 193     PTR "_" #initializer SIGNED_STUB_INITIALIZER "\n" \
 194     ".text"                                        \
 195 );                                                 \
 196 extern char OBJC_CLASS_$_ ## name;                 \
 197 Class Raw ## name = (Class)&OBJC_CLASS_$_ ## name; \
 198 SWIFT_STUB_CLASSREF(name)
 199
 200
 201 void fn(void) { }