derek.holloway
7502bf64a4
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142 lines
5.5 KiB
ArmAsm
142 lines
5.5 KiB
ArmAsm
# REQUIRES: x86
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# RUN: rm -rf %t; split-file %s %t
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# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos \
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# RUN: %t/weak-foo.s -o %t/weak-foo.o
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# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos \
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# RUN: %t/weak-autohide-foo.s -o %t/weak-autohide-foo.o
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# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos \
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# RUN: %t/weak-foo-pe.s -o %t/weak-foo-pe.o
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# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos \
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# RUN: %t/weak-autohide-foo-pe.s -o %t/weak-autohide-foo-pe.o
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# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos \
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# RUN: %t/ref-foo.s -o %t/ref-foo.o
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## Basics: A weak_def_can_be_hidden symbol should not be in the output's
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## export table, nor in the weak bind table, and references to it from
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## within the dylib should not use weak indirect lookups.
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## Think: Inline function compiled without any -fvisibility flags, inline
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## function does not have its address taken. In -O2 compiles, GlobalOpt will
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## upgrade the inline function from .weak_definition to .weak_def_can_be_hidden.
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# RUN: %lld -dylib -o %t/weak-autohide-foo.dylib \
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# RUN: %t/weak-autohide-foo.o %t/ref-foo.o
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# RUN: llvm-objdump --syms --exports-trie %t/weak-autohide-foo.dylib | \
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# RUN: FileCheck --check-prefix=EXPORTS %s
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# RUN: llvm-nm -m %t/weak-autohide-foo.dylib | \
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# RUN: FileCheck --check-prefix=EXPORTS-NM %s
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# RUN: llvm-objdump --macho --bind --weak-bind %t/weak-autohide-foo.dylib | \
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# RUN: FileCheck --check-prefix=WEAKBIND %s
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# RUN: llvm-objdump --macho --private-header %t/weak-autohide-foo.dylib | \
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# RUN: FileCheck --check-prefix=HEADERS %s
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## ld64 doesn't treat .weak_def_can_be_hidden as weak symbols in the
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## exports trie or bind tables, but it claims they are weak in the symbol
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## table. lld marks them as local in the symbol table, see also test
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## weak-private-extern.s. These FileCheck lines match both outputs.
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# EXPORTS-LABEL: SYMBOL TABLE:
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# EXPORTS-DAG: [[#%x, FOO_ADDR:]] {{.*}} _foo
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# EXPORTS-LABEL: Exports trie:
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# EXPORTS-NOT: 0x{{0*}}[[#%X, FOO_ADDR]] _foo
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## nm output for .weak_def_can_be_hidden says "was a private external" even
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## though it wasn't .private_extern: It was just .weak_def_can_be_hidden.
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## This matches ld64.
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# EXPORTS-NM: (__TEXT,__text) non-external (was a private external) _foo
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# WEAKBIND-NOT: __got
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# WEAKBIND-NOT: __la_symbol_ptr
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## ld64 sets WEAKBIND and BINDS_TO_WEAK in the mach-o header even though there
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## are no weak bindings or weak definitions after processing the autohide. That
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## looks like a bug in ld64 (?) If you change lit.local.cfg to set %lld to ld to
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## test compatibility, you have to add some arbitrary suffix to these two lines:
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# HEADERS-NOT: WEAK_DEFINES
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# HEADERS-NOT: BINDS_TO_WEAK
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## Same behavior for a symbol that's both .weak_def_can_be_hidden and
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## .private_extern. Think: Inline function compiled with
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## -fvisibility-inlines-hidden.
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# RUN: %lld -dylib -o %t/weak-autohide-foo-pe.dylib \
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# RUN: %t/weak-autohide-foo-pe.o %t/ref-foo.o
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# RUN: llvm-objdump --syms --exports-trie %t/weak-autohide-foo-pe.dylib | \
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# RUN: FileCheck --check-prefix=EXPORTS %s
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# RUN: llvm-nm -m %t/weak-autohide-foo-pe.dylib | \
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# RUN: FileCheck --check-prefix=EXPORTS-NM %s
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# RUN: llvm-objdump --macho --bind --weak-bind %t/weak-autohide-foo-pe.dylib | \
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# RUN: FileCheck --check-prefix=WEAKBIND %s
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# RUN: llvm-objdump --macho --private-header %t/weak-autohide-foo-pe.dylib | \
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# RUN: FileCheck --check-prefix=HEADERS %s
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## In fact, a regular weak symbol that's .private_extern behaves the same
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## as well.
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# RUN: %lld -dylib -o %t/weak-foo-pe.dylib %t/weak-foo-pe.o %t/ref-foo.o
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# RUN: llvm-objdump --syms --exports-trie %t/weak-foo-pe.dylib | \
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# RUN: FileCheck --check-prefix=EXPORTS %s
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# RUN: llvm-nm -m %t/weak-foo-pe.dylib | \
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# RUN: FileCheck --check-prefix=EXPORTS-NM %s
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# RUN: llvm-objdump --macho --bind --weak-bind %t/weak-foo-pe.dylib | \
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# RUN: FileCheck --check-prefix=WEAKBIND %s
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# RUN: llvm-objdump --macho --private-header %t/weak-foo-pe.dylib | \
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# RUN: FileCheck --check-prefix=HEADERS %s
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## Combining a regular weak_definition with a weak_def_can_be_hidden produces
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## a regular weak external.
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# RUN: %lld -dylib -o %t/weak-foo.dylib -lSystem \
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# RUN: %t/weak-autohide-foo.o %t/weak-foo.o %t/ref-foo.o
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# RUN: llvm-objdump --syms --exports-trie %t/weak-foo.dylib | \
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# RUN: FileCheck --check-prefix=WEAK %s
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# RUN: llvm-nm -m %t/weak-foo.dylib | \
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# RUN: FileCheck --check-prefix=WEAK-NM %s
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# RUN: llvm-objdump --macho --bind --weak-bind %t/weak-foo.dylib | \
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# RUN: FileCheck --check-prefix=WEAK-WEAKBIND %s
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# RUN: llvm-objdump --macho --private-header %t/weak-foo.dylib | \
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# RUN: FileCheck --check-prefix=WEAK-HEADERS %s
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# WEAK-LABEL: SYMBOL TABLE:
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# WEAK-DAG: [[#%x, FOO_ADDR:]] w {{.*}} _foo
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# WEAK-LABEL: Exports trie:
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# WEAK-DAG: 0x{{0*}}[[#%X, FOO_ADDR]] _foo
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# WEAK-NM: (__TEXT,__text) weak external _foo
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# WEAK-WEAKBIND: __la_symbol_ptr 0x{{.*}} pointer 0 _foo
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# WEAK-HEADERS: WEAK_DEFINES
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# WEAK-HEADERS: BINDS_TO_WEAK
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#--- weak-foo.s
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.globl _foo
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.weak_definition _foo
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_foo:
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retq
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#--- weak-autohide-foo.s
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.globl _foo
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.weak_def_can_be_hidden _foo
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_foo:
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retq
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# An alias is the only way to set .weak_def_can_be_hidden on an already-hidden symbol.
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# Veryify that LLD can handle these double-hidden symbols gracefully.
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.set l_foo, _foo
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#--- weak-foo-pe.s
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.private_extern _foo
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.globl _foo
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.weak_definition _foo
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_foo:
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retq
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#--- weak-autohide-foo-pe.s
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.private_extern _foo
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.globl _foo
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.weak_def_can_be_hidden _foo
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_foo:
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retq
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#--- ref-foo.s
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.globl _bar
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_bar:
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callq _foo
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retq
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