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flat-namespace-interposable.s
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# REQUIRES: x86
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# RUN: rm -rf %t; split-file %s %t
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## With -flat_namespace, non-weak extern symbols in dylibs become interposable.
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## Check that we generate the correct bindings for them. The test also includes
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## other symbol types like weak externs to verify we continue to do the same
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## (correct) thing even when `-flat_namespace` is enabled, instead of generating
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## spurious bindings.
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# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos -o %t/foo.o %t/foo.s
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# RUN: %lld -lSystem -flat_namespace -o %t/foo %t/foo.o
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# RUN: %lld -lSystem -flat_namespace -fixup_chains -o %t/chained %t/foo.o
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# RUN: %lld -lSystem -dylib -flat_namespace -o %t/foo.dylib %t/foo.o
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# RUN: %lld -lSystem -dylib -flat_namespace -fixup_chains -o %t/chained.dylib %t/foo.o
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# RUN: %lld -lSystem -bundle -flat_namespace -o %t/foo.bundle %t/foo.o
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# RUN: %lld -lSystem -bundle -flat_namespace -fixup_chains -o %t/chained.bundle %t/foo.o
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# RUN: llvm-objdump --macho --syms --rebase --bind --lazy-bind --weak-bind %t/foo | \
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# RUN:   FileCheck %s --check-prefixes=SYMS,EXEC --implicit-check-not=_private_extern
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# RUN: llvm-objdump --macho --syms %t/chained >> %t/chained.objdump
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# RUN: llvm-objdump --macho --dyld-info %t/chained >> %t/chained.objdump
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# RUN: FileCheck %s --check-prefixes=SYMS,CHAINED-EXEC < %t/chained.objdump
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# RUN: llvm-objdump --macho --syms %t/chained.dylib >> %t/dylib.objdump
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# RUN: llvm-objdump --macho --dyld-info %t/chained.dylib >> %t/dylib.objdump
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# RUN: FileCheck %s --check-prefixes=SYMS,CHAINED-DYLIB < %t/dylib.objdump
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# RUN: llvm-objdump --macho --syms %t/chained.bundle >> %t/bundle.objdump
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# RUN: llvm-objdump --macho --dyld-info %t/chained.bundle >> %t/bundle.objdump
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# RUN: FileCheck %s --check-prefixes=SYMS,CHAINED-DYLIB < %t/bundle.objdump
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# SYMS: SYMBOL TABLE:
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# SYMS-DAG: [[#%x, EXTERN_REF:]] l     O __DATA,__data _extern_ref
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# SYMS-DAG: [[#%x, LOCAL_REF:]]  l     O __DATA,__data _local_ref
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# SYMS-DAG: [[#%x, WEAK_REF:]]   l     O __DATA,__data _weak_ref
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# SYMS-DAG: [[#%x, TLV_REF:]]    g     O __DATA,__thread_vars _tlv
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## Executables with -flat_namespace don't have interposable externs.
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# EXEC:       Rebase table:
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# EXEC-NEXT:  segment  section          address                  type
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# EXEC-DAG:   __DATA   __la_symbol_ptr  0x[[#%X, WEAK_LAZY:]]    pointer
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# EXEC-DAG:   __DATA   __data           0x[[#%.8X, EXTERN_REF]]  pointer
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# EXEC-DAG:   __DATA   __data           0x[[#%.8X, LOCAL_REF]]   pointer
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# EXEC-DAG:   __DATA   __data           0x[[#%.8X, WEAK_REF]]    pointer
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# EXEC-EMPTY:
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# EXEC-NEXT:  Bind table:
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# EXEC-NEXT:  segment  section          address  type     addend dylib   symbol
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# EXEC-EMPTY:
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# EXEC-NEXT:  Lazy bind table:
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# EXEC-NEXT:  segment  section          address  dylib    symbol
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# EXEC-EMPTY:
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# EXEC-NEXT:  Weak bind table:
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# EXEC-NEXT:  segment  section          address                type     addend   symbol
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# EXEC-NEXT:  __DATA   __la_symbol_ptr  0x[[#%.8X, WEAK_LAZY]] pointer       0   _weak_extern
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# EXEC-NEXT:  __DATA   __data           0x[[#%.8X, WEAK_REF]]  pointer       0   _weak_extern
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# EXEC-EMPTY:
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# CHAINED-EXEC:      dyld information:
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# CHAINED-EXEC-NEXT: segment      section  address               pointer type   addend dylib  symbol/vm address
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# CHAINED-EXEC-DAG:  __DATA_CONST __got    {{.*}}                {{.*}}  bind   0x0    weak   _weak_extern
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# CHAINED-EXEC-DAG: __DATA       __data    0x[[#%x, EXTERN_REF]] {{.*}}  rebase               {{.*}}
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# CHAINED-EXEC-DAG: __DATA       __data    0x[[#%x, WEAK_REF]]   {{.*}}  bind   0x0    weak   _weak_extern
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# CHAINED-EXEC-DAG: __DATA       __data    0x[[#%x, LOCAL_REF]]  {{.*}}  rebase               {{.*}}
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# CHAINED-EXEC-EMPTY:
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# DYLIB:       Rebase table:
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# DYLIB-NEXT:  segment      section          address                  type
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# DYLIB-DAG:   __DATA       __la_symbol_ptr  0x[[#%X, WEAK_LAZY:]]    pointer
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# DYLIB-DAG:   __DATA       __la_symbol_ptr  0x[[#%X, EXTERN_LAZY:]]  pointer
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# DYLIB-DAG:   __DATA       __data           0x[[#%.8X, EXTERN_REF]]  pointer
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# DYLIB-DAG:   __DATA       __data           0x[[#%.8X, LOCAL_REF]]   pointer
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# DYLIB-DAG:   __DATA       __data           0x[[#%.8X, WEAK_REF]]    pointer
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# DYLIB-DAG:   __DATA       __thread_ptrs    0x[[#%.8X, TLV_REF]]     pointer
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# DYLIB-EMPTY:
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# DYLIB-NEXT:  Bind table:
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# DYLIB-NEXT:  segment      section        address                 type     addend dylib            symbol
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# DYLIB-DAG:   __DATA_CONST __got          {{.*}}                  pointer       0 flat-namespace   dyld_stub_binder
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# DYLIB-DAG:   __DATA       __data         0x[[#%.8X, EXTERN_REF]] pointer       0 flat-namespace   _extern
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# DYLIB-DAG:   __DATA       __thread_ptrs  0x[[#%.8X, TLV_REF]]    pointer       0 flat-namespace   _tlv
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# DYLIB-EMPTY:
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# DYLIB-NEXT:  Lazy bind table:
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# DYLIB-NEXT:  segment  section            address                  dylib           symbol
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# DYLIB-NEXT:  __DATA   __la_symbol_ptr    0x[[#%.8X, EXTERN_LAZY]] flat-namespace   _extern
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# DYLIB-EMPTY:
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# DYLIB-NEXT:  Weak bind table:
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# DYLIB-NEXT:  segment  section            address                  type    addend   symbol
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# DYLIB-NEXT:  __DATA   __la_symbol_ptr    0x[[#%.8X, WEAK_LAZY]]   pointer      0   _weak_extern
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# DYLIB-NEXT:  __DATA   __data             0x[[#%.8X, WEAK_REF]]    pointer      0   _weak_extern
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# DYLIB-EMPTY:
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# CHAINED-DYLIB: dyld information:
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# CHAINED-DYLIB-NEXT: segment      section      address               pointer type  addend dylib           symbol/vm address
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# CHAINED-DYLIB-DAG: __DATA_CONST __got         {{.*}}                {{.*}}  bind  0x0    weak            _weak_extern
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# CHAINED-DYLIB-DAG: __DATA_CONST __got         {{.*}}                {{.*}}  bind  0x0    flat-namespace  _extern
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# CHAINED-DYLIB-DAG: __DATA       __data        0x[[#%x, EXTERN_REF]] {{.*}}  bind  0x0    flat-namespace  _extern
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# CHAINED-DYLIB-DAG: __DATA       __data        0x[[#%x, WEAK_REF]]   {{.*}}  bind  0x0    weak            _weak_extern
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# CHAINED-DYLIB-DAG: __DATA       __data        0x[[#%x, LOCAL_REF]]  {{.*}}  rebase                       {{.*}}
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# CHAINED-DYLIB-DAG: __DATA       __thread_ptrs 0x[[#%x, TLV_REF]]    {{.*}}  bind  0x0    flat-namespace  _tlv
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# CHAINED-DYLIB-EMPTY:
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#--- foo.s
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.globl _main, _extern, _weak_extern, _tlv
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.weak_definition _weak_extern
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.private_extern _private_extern
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_extern:
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  retq
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_weak_extern:
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  retq
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_private_extern:
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  retq
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_local:
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  retq
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_main:
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  callq _extern
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  callq _weak_extern
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  callq _private_extern
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  callq _local
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  mov _tlv@TLVP(%rip), %rax
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  retq
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.data
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_extern_ref:
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.quad _extern
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_weak_ref:
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.quad _weak_extern
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_local_ref:
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.quad _local
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.section __DATA,__thread_vars,thread_local_variables
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_tlv:
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.subsections_via_symbols
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