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 #   define SIGNED_METHOD_LIST "@AUTH(da,0xC310,addr) "
  19 #   define SIGNED_ISA "@AUTH(da, 0x6AE1, addr) "
  20 #   define SIGNED_SUPER "@AUTH(da, 0xB5AB, addr) "
  21 #else
  22 #   define SIGNED_METHOD_LIST_IMP
  23 #   define SIGNED_STUB_INITIALIZER
  24 #   define SIGNED_METHOD_LIST
  25 #   define SIGNED_ISA
  26 #   define SIGNED_SUPER
  27 #endif
  28
  29 #define str(x) #x
  30 #define str2(x) str(x)
  31
  32 // Swift metadata initializers. Define these in the test.
  33 EXTERN_C Class initSuper(Class cls, void *arg);
  34 EXTERN_C Class initSub(Class cls, void *arg);
  35
  36 @interface SwiftSuper : NSObject @end
  37 @interface SwiftSub : SwiftSuper @end
  38
  39 __BEGIN_DECLS
  40 // not id to avoid ARC operations because the class doesn't implement RR methods
  41 void* nop(void* self) { return self; }
  42 __END_DECLS
  43
  44 #define SWIFT_CLASS(name, superclass, swiftInit) \
  45 asm(                                               \
  46     ".globl _OBJC_CLASS_$_" #name             "\n" \
  47     ".section __DATA,__objc_data               \n" \
  48     ".align 3                                  \n" \
  49     "_OBJC_CLASS_$_" #name ":                  \n" \
  50     PTR "_OBJC_METACLASS_$_" #name SIGNED_ISA "\n" \
  51     PTR "_OBJC_CLASS_$_" #superclass SIGNED_SUPER "\n" \
  52     PTR "__objc_empty_cache                    \n" \
  53     PTR "0 \n"                                     \
  54     PTR "L_" #name "_ro + 2 \n"                    \
  55     /* Swift class fields. */                      \
  56     ".long 0 \n"   /* flags */                     \
  57     ".long 0 \n"   /* instanceAddressOffset */     \
  58     ".long 16 \n"  /* instanceSize */              \
  59     ".short 15 \n" /* instanceAlignMask */         \
  60     ".short 0 \n"  /* reserved */                  \
  61     ".long 256 \n" /* classSize */                 \
  62     ".long 0 \n"   /* classAddressOffset */        \
  63     PTR "0 \n"     /* description */               \
  64     /* pad to OBJC_MAX_CLASS_SIZE */               \
  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     PTR "0 \n"                                     \
  84     PTR "0 \n"                                     \
  85     PTR "0 \n"                                     \
  86     PTR "0 \n"                                     \
  87     PTR "0 \n"                                     \
  88     PTR "0 \n"                                     \
  89                                                    \
  90     "_OBJC_METACLASS_$_" #name ":              \n" \
  91     PTR "_OBJC_METACLASS_$_" #superclass SIGNED_ISA "\n" \
  92     PTR "_OBJC_METACLASS_$_" #superclass SIGNED_SUPER "\n" \
  93     PTR "__objc_empty_cache                    \n" \
  94     PTR "0 \n"                                     \
  95     PTR "L_" #name "_meta_ro \n"                   \
  96     /* pad to OBJC_MAX_CLASS_SIZE */               \
  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     PTR "0 \n"                                     \
 119     PTR "0 \n"                                     \
 120     PTR "0 \n"                                     \
 121     PTR "0 \n"                                     \
 122     PTR "0 \n"                                     \
 123     PTR "0 \n"                                     \
 124                                                    \
 125     "L_" #name "_ro: \n"                           \
 126     ".long (1<<6) \n"                              \
 127     ".long 0 \n"                                   \
 128     ".long " PTRSIZE " \n"                         \
 129     ONLY_LP64(".long 0 \n")                        \
 130     PTR "0 \n"                                     \
 131     PTR "L_" #name "_name \n"                      \
 132     PTR "L_" #name "_methods" SIGNED_METHOD_LIST "\n" \
 133     PTR "0 \n"                                     \
 134     PTR "L_" #name "_ivars \n"                     \
 135     PTR "0 \n"                                     \
 136     PTR "0 \n"                                     \
 137     PTR "_" #swiftInit SIGNED_METHOD_LIST_IMP "\n" \
 138                                                    \
 139     "L_" #name "_meta_ro: \n"                      \
 140     ".long 1 \n"                                   \
 141     ".long 40 \n"                                  \
 142     ".long 40 \n"                                  \
 143     ONLY_LP64(".long 0 \n")                        \
 144     PTR "0 \n"                                     \
 145     PTR "L_" #name "_name \n"                      \
 146     PTR "L_" #name "_meta_methods" SIGNED_METHOD_LIST "\n" \
 147     PTR "0 \n"                                     \
 148     PTR "0 \n"                                     \
 149     PTR "0 \n"                                     \
 150     PTR "0 \n"                                     \
 151                                                    \
 152     "L_" #name "_methods: \n"                      \
 153     "L_" #name "_meta_methods: \n"                 \
 154     ".long 3*" PTRSIZE "\n"                        \
 155     ".long 1 \n"                                   \
 156     PTR "L_" #name "_self \n"                      \
 157     PTR "L_" #name "_self \n"                      \
 158     PTR "_nop" SIGNED_METHOD_LIST_IMP "\n"         \
 159                                                    \
 160     "L_" #name "_ivars: \n"                        \
 161     ".long 4*" PTRSIZE " \n"                       \
 162     ".long 1 \n"                                   \
 163     PTR "L_" #name "_ivar_offset \n"               \
 164     PTR "L_" #name "_ivar_name \n"                 \
 165     PTR "L_" #name "_ivar_type \n"                 \
 166     ".long " LOGPTRSIZE "\n"                       \
 167     ".long " PTRSIZE "\n"                          \
 168                                                    \
 169     "L_" #name "_ivar_offset: \n"                  \
 170     ".long 0 \n"                                   \
 171                                                    \
 172     ".cstring \n"                                  \
 173     "L_" #name "_name: .ascii \"" #name "\\0\" \n" \
 174     "L_" #name "_self: .ascii \"self\\0\" \n"      \
 175     "L_" #name "_ivar_name: "                      \
 176     "  .ascii \"" #name "_ivar\\0\" \n"            \
 177     "L_" #name "_ivar_type: .ascii \"c\\0\" \n"    \
 178                                                    \
 179                                                    \
 180     ".text \n"                                     \
 181 );                                                 \
 182 extern char OBJC_CLASS_$_ ## name;                 \
 183 Class Raw ## name = (Class)&OBJC_CLASS_$_ ## name
 184
 185 #define SWIFT_STUB_CLASSREF(name)  \
 186 extern char OBJC_CLASS_$_ ## name; \
 187 static Class name ## Classref = (Class)(&OBJC_CLASS_$_ ## name + 1)
 188
 189 #define SWIFT_STUB_CLASS(name, initializer)        \
 190 asm(                                               \
 191     ".globl _OBJC_CLASS_$_" #name "\n"             \
 192     ".section __DATA,__objc_data \n"               \
 193     ".align 3 \n"                                  \
 194     "_dummy" #name ": \n"                          \
 195     PTR "0 \n"                                     \
 196     ".alt_entry _OBJC_CLASS_$_" #name "\n"         \
 197     "_OBJC_CLASS_$_" #name ": \n"                  \
 198     PTR "1 \n"                                     \
 199     PTR "_" #initializer SIGNED_STUB_INITIALIZER "\n" \
 200     ".text"                                        \
 201 );                                                 \
 202 extern char OBJC_CLASS_$_ ## name;                 \
 203 Class Raw ## name = (Class)&OBJC_CLASS_$_ ## name; \
 204 SWIFT_STUB_CLASSREF(name)
 205
 206
 207 void fn(void) { }