lld/test/ELF/wrap-drop-shared-original.s

   1 ## If the original of a wrapped symbol becomes unreferenced after wrapping, it
   2 ## should be dropped from the dynamic symbol table even if defined in a shared
   3 ## library.
   4
   5 # REQUIRES: x86
   6
   7 # RUN: rm -rf %t && split-file %s %t
   8 # RUN: llvm-mc -filetype=obj -triple=x86_64-elf %t/original.s -o %t/original.o
   9 # RUN: llvm-mc -filetype=obj -triple=x86_64-elf %t/wrapped.s -o %t/wrapped.o
  10 # RUN: llvm-mc -filetype=obj -triple=x86_64-elf %t/ref.s -o %t/ref.o
  11 # RUN: ld.lld -shared -o %t/liboriginal.so -soname liboriginal.so %t/original.o
  12 # RUN: ld.lld -shared -o %t/liboriginal-and-wrapped.so \
  13 # RUN:   -soname liboriginal-and-wrapped.so %t/original.o %t/wrapped.o
  14 # RUN: ld.lld -shared -o %t/libref-with-original.so %t/ref.o \
  15 # RUN:   --as-needed %t/liboriginal.so --wrap foo
  16 # RUN: llvm-readelf --dynamic --dyn-syms %t/libref-with-original.so | \
  17 # RUN:   FileCheck --check-prefix=ORIGINAL %s
  18 # RUN: ld.lld -shared -o %t/libref-with-original-and-wrapped.so %t/ref.o \
  19 # RUN:   --as-needed %t/liboriginal-and-wrapped.so --wrap foo
  20 # RUN: llvm-readelf --dynamic --dyn-syms %t/libref-with-original-and-wrapped.so | \
  21 # RUN:   FileCheck --check-prefix=ORIGINAL-AND-WRAPPED %s
  22
  23 # ORIGINAL-NOT: (NEEDED) Shared library: [liboriginal.so]
  24 # ORIGINAL:      Symbol table '.dynsym' contains 3 entries:
  25 # ORIGINAL:      NOTYPE  LOCAL  DEFAULT   UND
  26 # ORIGINAL-NEXT: NOTYPE  GLOBAL DEFAULT   UND __wrap_foo
  27 # ORIGINAL-NEXT: NOTYPE  GLOBAL DEFAULT     6 ref
  28
  29 # ORIGINAL-AND-WRAPPED: (NEEDED) Shared library: [liboriginal-and-wrapped.so]
  30 # ORIGINAL-AND-WRAPPED:      Symbol table '.dynsym' contains 3 entries:
  31 # ORIGINAL-AND-WRAPPED:      NOTYPE  LOCAL  DEFAULT   UND
  32 # ORIGINAL-AND-WRAPPED-NEXT: NOTYPE  GLOBAL DEFAULT   UND __wrap_foo
  33 # ORIGINAL-AND-WRAPPED-NEXT: NOTYPE  GLOBAL DEFAULT     6 ref
  34
  35 #--- original.s
  36 .globl foo
  37 foo:
  38         retq
  39
  40 #--- wrapped.s
  41 .globl __wrap_foo
  42 __wrap_foo:
  43         retq
  44
  45 #--- ref.s
  46 .globl ref
  47 ref:
  48         jmp     foo@plt