lld/test/MachO/discard-llvm-sections.s

   1 # REQUIRES: x86
   2 # RUN: rm -rf %t; split-file %s %t
   3 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %t/foo.s -o %t/foo.o
   4 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %t/bar.s -o %t/bar.o
   5
   6 ## "_llvm." symbols are not special. LLD would produce duplicate symbol errors
   7 ## if they were not within the LLVM segment.
   8
   9 ## 1/ Test that LLD does not produce duplicate symbols errors when linking global symbols
  10 ##    with the same name under the LLVM segment.
  11 # RUN: %lld -dylib %t/foo.o %t/bar.o -o %t/libDuplicate.dylib
  12
  13 ## 2/ Test that all sections within an LLVM segment are dropped.
  14 # RUN: llvm-objdump --section-headers %t/libDuplicate.dylib | FileCheck %s
  15
  16 # CHECK-LABEL: Sections:
  17 # CHECK-NEXT:  Idx  Name    Size      VMA            Type
  18 # CHECK-NEXT:  0    __text  00000000  {{[0-9a-f]+}}  TEXT
  19
  20 ## 3/ Test that linking global symbol that is not under the LLVM segment produces duplicate
  21 ##    symbols
  22 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin --defsym TEXT=0 %t/foo.s -o %t/foo.o
  23 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin --defsym TEXT=0 %t/bar.s -o %t/bar.o
  24 # RUN: not %lld -dylib %t/foo.o %t/bar.o -o %t/libDuplicate.dylib 2>&1 | FileCheck %s --check-prefix=DUP
  25
  26 # DUP: error: duplicate symbol: _llvm.foo
  27
  28 #--- foo.s
  29 .globl _llvm.foo
  30 .ifdef TEXT
  31   .section __TEXT,__cstring
  32 .else
  33   .section __LLVM,__bitcode
  34 .endif
  35   _llvm.foo:
  36     .asciz "test"
  37
  38 #--- bar.s
  39 .globl _llvm.foo
  40 .ifdef TEXT
  41   .section __TEXT,__cstring
  42 .else
  43   .section __LLVM,__bitcode
  44 .endif
  45   _llvm.foo:
  46     .asciz "test"