lld/test/MachO/flat-namespace-interposable.s

   1 # REQUIRES: x86
   2 # RUN: rm -rf %t; split-file %s %t
   3
   4 ## With -flat_namespace, non-weak extern symbols in dylibs become interposable.
   5 ## Check that we generate the correct bindings for them. The test also includes
   6 ## other symbol types like weak externs to verify we continue to do the same
   7 ## (correct) thing even when `-flat_namespace` is enabled, instead of generating
   8 ## spurious bindings.
   9
  10 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos -o %t/foo.o %t/foo.s
  11 # RUN: %lld -lSystem -flat_namespace -o %t/foo %t/foo.o
  12 # RUN: %lld -lSystem -flat_namespace -fixup_chains -o %t/chained %t/foo.o
  13 # RUN: %lld -lSystem -dylib -flat_namespace -o %t/foo.dylib %t/foo.o
  14 # RUN: %lld -lSystem -dylib -flat_namespace -fixup_chains -o %t/chained.dylib %t/foo.o
  15 # RUN: %lld -lSystem -bundle -flat_namespace -o %t/foo.bundle %t/foo.o
  16 # RUN: %lld -lSystem -bundle -flat_namespace -fixup_chains -o %t/chained.bundle %t/foo.o
  17 # RUN: llvm-objdump --macho --syms --rebase --bind --lazy-bind --weak-bind %t/foo | \
  18 # RUN:   FileCheck %s --check-prefixes=SYMS,EXEC --implicit-check-not=_private_extern
  19 # RUN: llvm-objdump --macho --syms %t/chained >> %t/chained.objdump
  20 # RUN: llvm-objdump --macho --dyld-info %t/chained >> %t/chained.objdump
  21 # RUN: FileCheck %s --check-prefixes=SYMS,CHAINED-EXEC < %t/chained.objdump
  22 # RUN: llvm-objdump --macho --syms %t/chained.dylib >> %t/dylib.objdump
  23 # RUN: llvm-objdump --macho --dyld-info %t/chained.dylib >> %t/dylib.objdump
  24 # RUN: FileCheck %s --check-prefixes=SYMS,CHAINED-DYLIB < %t/dylib.objdump
  25 # RUN: llvm-objdump --macho --syms %t/chained.bundle >> %t/bundle.objdump
  26 # RUN: llvm-objdump --macho --dyld-info %t/chained.bundle >> %t/bundle.objdump
  27 # RUN: FileCheck %s --check-prefixes=SYMS,CHAINED-DYLIB < %t/bundle.objdump
  28
  29 # SYMS: SYMBOL TABLE:
  30 # SYMS-DAG: [[#%x, EXTERN_REF:]] l     O __DATA,__data _extern_ref
  31 # SYMS-DAG: [[#%x, LOCAL_REF:]]  l     O __DATA,__data _local_ref
  32 # SYMS-DAG: [[#%x, WEAK_REF:]]   l     O __DATA,__data _weak_ref
  33 # SYMS-DAG: [[#%x, TLV_REF:]]    g     O __DATA,__thread_vars _tlv
  34
  35 ## Executables with -flat_namespace don't have interposable externs.
  36 # EXEC:       Rebase table:
  37 # EXEC-NEXT:  segment  section          address                  type
  38 # EXEC-DAG:   __DATA   __la_symbol_ptr  0x[[#%X, WEAK_LAZY:]]    pointer
  39 # EXEC-DAG:   __DATA   __data           0x[[#%.8X, EXTERN_REF]]  pointer
  40 # EXEC-DAG:   __DATA   __data           0x[[#%.8X, LOCAL_REF]]   pointer
  41 # EXEC-DAG:   __DATA   __data           0x[[#%.8X, WEAK_REF]]    pointer
  42 # EXEC-EMPTY:
  43 # EXEC-NEXT:  Bind table:
  44 # EXEC-NEXT:  segment  section          address  type     addend dylib   symbol
  45 # EXEC-EMPTY:
  46 # EXEC-NEXT:  Lazy bind table:
  47 # EXEC-NEXT:  segment  section          address  dylib    symbol
  48 # EXEC-EMPTY:
  49 # EXEC-NEXT:  Weak bind table:
  50 # EXEC-NEXT:  segment  section          address                type     addend   symbol
  51 # EXEC-NEXT:  __DATA   __la_symbol_ptr  0x[[#%.8X, WEAK_LAZY]] pointer       0   _weak_extern
  52 # EXEC-NEXT:  __DATA   __data           0x[[#%.8X, WEAK_REF]]  pointer       0   _weak_extern
  53 # EXEC-EMPTY:
  54
  55 # CHAINED-EXEC:      dyld information:
  56 # CHAINED-EXEC-NEXT: segment      section  address               pointer type   addend dylib  symbol/vm address
  57 # CHAINED-EXEC-DAG:  __DATA_CONST __got    {{.*}}                {{.*}}  bind   0x0    weak   _weak_extern
  58 # CHAINED-EXEC-DAG: __DATA       __data    0x[[#%x, EXTERN_REF]] {{.*}}  rebase               {{.*}}
  59 # CHAINED-EXEC-DAG: __DATA       __data    0x[[#%x, WEAK_REF]]   {{.*}}  bind   0x0    weak   _weak_extern
  60 # CHAINED-EXEC-DAG: __DATA       __data    0x[[#%x, LOCAL_REF]]  {{.*}}  rebase               {{.*}}
  61 # CHAINED-EXEC-EMPTY:
  62
  63 # DYLIB:       Rebase table:
  64 # DYLIB-NEXT:  segment      section          address                  type
  65 # DYLIB-DAG:   __DATA       __la_symbol_ptr  0x[[#%X, WEAK_LAZY:]]    pointer
  66 # DYLIB-DAG:   __DATA       __la_symbol_ptr  0x[[#%X, EXTERN_LAZY:]]  pointer
  67 # DYLIB-DAG:   __DATA       __data           0x[[#%.8X, EXTERN_REF]]  pointer
  68 # DYLIB-DAG:   __DATA       __data           0x[[#%.8X, LOCAL_REF]]   pointer
  69 # DYLIB-DAG:   __DATA       __data           0x[[#%.8X, WEAK_REF]]    pointer
  70 # DYLIB-DAG:   __DATA       __thread_ptrs    0x[[#%.8X, TLV_REF]]     pointer
  71 # DYLIB-EMPTY:
  72 # DYLIB-NEXT:  Bind table:
  73 # DYLIB-NEXT:  segment      section        address                 type     addend dylib            symbol
  74 # DYLIB-DAG:   __DATA_CONST __got          {{.*}}                  pointer       0 flat-namespace   dyld_stub_binder
  75 # DYLIB-DAG:   __DATA       __data         0x[[#%.8X, EXTERN_REF]] pointer       0 flat-namespace   _extern
  76 # DYLIB-DAG:   __DATA       __thread_ptrs  0x[[#%.8X, TLV_REF]]    pointer       0 flat-namespace   _tlv
  77 # DYLIB-EMPTY:
  78 # DYLIB-NEXT:  Lazy bind table:
  79 # DYLIB-NEXT:  segment  section            address                  dylib           symbol
  80 # DYLIB-NEXT:  __DATA   __la_symbol_ptr    0x[[#%.8X, EXTERN_LAZY]] flat-namespace   _extern
  81 # DYLIB-EMPTY:
  82 # DYLIB-NEXT:  Weak bind table:
  83 # DYLIB-NEXT:  segment  section            address                  type    addend   symbol
  84 # DYLIB-NEXT:  __DATA   __la_symbol_ptr    0x[[#%.8X, WEAK_LAZY]]   pointer      0   _weak_extern
  85 # DYLIB-NEXT:  __DATA   __data             0x[[#%.8X, WEAK_REF]]    pointer      0   _weak_extern
  86 # DYLIB-EMPTY:
  87
  88 # CHAINED-DYLIB: dyld information:
  89 # CHAINED-DYLIB-NEXT: segment      section      address               pointer type  addend dylib           symbol/vm address
  90 # CHAINED-DYLIB-DAG: __DATA_CONST __got         {{.*}}                {{.*}}  bind  0x0    weak            _weak_extern
  91 # CHAINED-DYLIB-DAG: __DATA_CONST __got         {{.*}}                {{.*}}  bind  0x0    flat-namespace  _extern
  92 # CHAINED-DYLIB-DAG: __DATA       __data        0x[[#%x, EXTERN_REF]] {{.*}}  bind  0x0    flat-namespace  _extern
  93 # CHAINED-DYLIB-DAG: __DATA       __data        0x[[#%x, WEAK_REF]]   {{.*}}  bind  0x0    weak            _weak_extern
  94 # CHAINED-DYLIB-DAG: __DATA       __data        0x[[#%x, LOCAL_REF]]  {{.*}}  rebase                       {{.*}}
  95 # CHAINED-DYLIB-DAG: __DATA       __thread_ptrs 0x[[#%x, TLV_REF]]    {{.*}}  bind  0x0    flat-namespace  _tlv
  96 # CHAINED-DYLIB-EMPTY:
  97
  98 #--- foo.s
  99
 100 .globl _main, _extern, _weak_extern, _tlv
 101 .weak_definition _weak_extern
 102 .private_extern _private_extern
 103
 104 _extern:
 105   retq
 106 _weak_extern:
 107   retq
 108 _private_extern:
 109   retq
 110 _local:
 111   retq
 112
 113 _main:
 114   callq _extern
 115   callq _weak_extern
 116   callq _private_extern
 117   callq _local
 118   mov _tlv@TLVP(%rip), %rax
 119   retq
 120
 121 .data
 122 _extern_ref:
 123 .quad _extern
 124 _weak_ref:
 125 .quad _weak_extern
 126 _local_ref:
 127 .quad _local
 128
 129 .section __DATA,__thread_vars,thread_local_variables
 130 _tlv:
 131
 132 .subsections_via_symbols