272bf0fc41
As an optimization for ld64 sometimes it can be useful to not export any symbols for top level binaries that don't need any exports, to do this you can pass `-exported_symbols_list /dev/null`, or new with Xcode 14 (ld64 816) there is a `-no_exported_symbols` flag for the same behavior. This reproduces this behavior where previously an empty exported symbols list file would have been ignored. Differential Revision: https://reviews.llvm.org/D127562
264 lines
9.0 KiB
ArmAsm
264 lines
9.0 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 %t/default.s -o %t/default.o
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# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos %t/lazydef.s -o %t/lazydef.o
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# RUN: llvm-ar --format=darwin rcs %t/lazydef.a %t/lazydef.o
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## Check that mixing exported and unexported symbol options yields an error
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# RUN: not %lld -dylib %t/default.o -o /dev/null \
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# RUN: -exported_symbol a -unexported_symbol b 2>&1 | \
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# RUN: FileCheck --check-prefix=CONFLICT %s
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#
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# RUN: not %lld -dylib %t/default.o -o /dev/null \
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# RUN: -exported_symbols_list /dev/null -unexported_symbol b 2>&1 | \
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# RUN: FileCheck --check-prefix=CONFLICT %s
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#
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# RUN: not %lld -dylib %t/default.o -o /dev/null \
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# RUN: -no_exported_symbols -unexported_symbol b 2>&1 | \
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# RUN: FileCheck --check-prefix=CONFLICT %s
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#
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# RUN: not %lld -dylib %t/default.o -o /dev/null \
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# RUN: -no_exported_symbols -exported_symbol b 2>&1 | \
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# RUN: FileCheck --check-prefix=CONFLICT-NO-EXPORTS %s
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#
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# RUN: not %lld -dylib %t/default.o -o /dev/null \
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# RUN: -no_exported_symbols -exported_symbols_list %t/literals.txt 2>&1 | \
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# RUN: FileCheck --check-prefix=CONFLICT-NO-EXPORTS %s
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# CONFLICT: error: cannot use both -exported_symbol* and -unexported_symbol* options
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# CONFLICT-NO-EXPORTS: error: cannot use both -exported_symbol* and -no_exported_symbols options
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## Check that an exported literal name with no symbol definition yields an error
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## but that an exported glob-pattern with no matching symbol definition is OK
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# RUN: not %lld -dylib %t/default.o -o /dev/null \
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# RUN: -exported_symbol absent_literal \
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# RUN: -exported_symbol absent_gl?b 2>&1 | \
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# RUN: FileCheck --check-prefix=UNDEF %s
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# UNDEF: error: undefined symbol: absent_literal
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# UNDEF-NEXT: >>> referenced by -exported_symbol(s_list)
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# UNDEF-NOT: error: {{.*}} absent_gl{{.}}b
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## Check that dynamic_lookup suppresses the error
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# RUN: %lld -dylib %t/default.o -undefined dynamic_lookup -o %t/dyn-lookup \
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# RUN: -exported_symbol absent_literal
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# RUN: llvm-objdump --macho --syms %t/dyn-lookup | FileCheck %s --check-prefix=DYN
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# DYN: *UND* absent_literal
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## Check that exported literal symbols are present in output's
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## symbol table, even lazy symbols which would otherwise be omitted
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# RUN: %lld -dylib %t/default.o %t/lazydef.a -o %t/lazydef \
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# RUN: -exported_symbol _keep_globl \
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# RUN: -exported_symbol _keep_lazy
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# RUN: llvm-objdump --syms %t/lazydef | \
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# RUN: FileCheck --check-prefix=EXPORT %s
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# EXPORT-DAG: g F __TEXT,__text _keep_globl
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# EXPORT-DAG: g F __TEXT,__text _keep_lazy
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## Check that exported symbol is global
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# RUN: %no-fatal-warnings-lld -dylib %t/default.o -o %t/hidden-export \
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# RUN: -exported_symbol _private_extern 2>&1 | \
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# RUN: FileCheck --check-prefix=PRIVATE %s
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# PRIVATE: warning: cannot export hidden symbol _private_extern
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## Check that we still hide the other symbols despite the warning
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# RUN: llvm-objdump --macho --exports-trie %t/hidden-export | \
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# RUN: FileCheck --check-prefix=EMPTY-TRIE %s
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# EMPTY-TRIE: Exports trie:
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# EMPTY-TRIE-EMPTY:
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## Check that the export trie is unaltered
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# RUN: %lld -dylib %t/default.o -o %t/default
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# RUN: llvm-objdump --macho --exports-trie %t/default | \
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# RUN: FileCheck --check-prefix=DEFAULT %s
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# DEFAULT-LABEL: Exports trie:
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# DEFAULT-DAG: _hide_globl
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# DEFAULT-DAG: _keep_globl
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# DEFAULT-NOT: _private_extern
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## Check that the export trie is shaped by an allow list and then
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## by a deny list. Both lists are designed to yield the same result.
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## Check the allow list
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# RUN: %lld -dylib %t/default.o -o %t/allowed \
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# RUN: -exported_symbol _keep_globl
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# RUN: llvm-objdump --macho --exports-trie %t/allowed | \
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# RUN: FileCheck --check-prefix=TRIE %s
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# RUN: llvm-nm -m %t/allowed | \
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# RUN: FileCheck --check-prefix=NM %s
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## Check the deny list
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# RUN: %lld -dylib %t/default.o -o %t/denied \
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# RUN: -unexported_symbol _hide_globl
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# RUN: llvm-objdump --macho --exports-trie %t/denied | \
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# RUN: FileCheck --check-prefix=TRIE %s
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# RUN: llvm-nm -m %t/denied | \
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# RUN: FileCheck --check-prefix=NM %s
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# TRIE-LABEL: Exports trie:
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# TRIE-DAG: _keep_globl
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# TRIE-NOT: _hide_globl
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# TRIE-NOT: _private_extern
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# NM-DAG: external _keep_globl
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# NM-DAG: non-external (was a private external) _hide_globl
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# NM-DAG: non-external (was a private external) _private_extern
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# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos \
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# RUN: %t/symdefs.s -o %t/symdefs.o
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## Check that only string-literal patterns match
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## Check that comments and blank lines are stripped from symbol list
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# RUN: %lld -dylib %t/symdefs.o -o %t/literal \
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# RUN: -exported_symbols_list %t/literals.txt
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# RUN: llvm-objdump --macho --exports-trie %t/literal | \
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# RUN: FileCheck --check-prefix=LITERAL %s
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# LITERAL-DAG: literal_only
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# LITERAL-DAG: literal_also
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# LITERAL-DAG: globby_also
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# LITERAL-NOT: globby_only
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## Check that only glob patterns match
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## Check that comments and blank lines are stripped from symbol list
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# RUN: %lld -dylib %t/symdefs.o -o %t/globby \
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# RUN: -exported_symbols_list %t/globbys.txt
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# RUN: llvm-objdump --macho --exports-trie %t/globby | \
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# RUN: FileCheck --check-prefix=GLOBBY %s
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# GLOBBY-DAG: literal_also
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# GLOBBY-DAG: globby_only
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# GLOBBY-DAG: globby_also
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# GLOBBY-NOT: literal_only
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# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos \
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# RUN: %t/autohide.s -o %t/autohide.o
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# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos \
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# RUN: %t/autohide-private-extern.s -o %t/autohide-private-extern.o
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# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos \
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# RUN: %t/glob-private-extern.s -o %t/glob-private-extern.o
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# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-macos \
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# RUN: %t/weak-private-extern.s -o %t/weak-private-extern.o
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## Test that we can export the autohide symbol but not when it's also
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## private-extern
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# RUN: %lld -dylib -exported_symbol "_foo" %t/autohide.o -o %t/exp-autohide.dylib
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# RUN: llvm-nm -g %t/exp-autohide.dylib | FileCheck %s --check-prefix=EXP-AUTOHIDE
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# RUN: not %lld -dylib -exported_symbol "_foo" %t/autohide-private-extern.o \
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# RUN: -o /dev/null 2>&1 | FileCheck %s --check-prefix=AUTOHIDE-PRIVATE
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# RUN: not %lld -dylib -exported_symbol "_foo" %t/autohide.o \
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# RUN: %t/glob-private-extern.o -o /dev/null 2>&1 | \
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# RUN: FileCheck %s --check-prefix=AUTOHIDE-PRIVATE
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# RUN: not %lld -dylib -exported_symbol "_foo" %t/autohide.o \
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# RUN: %t/weak-private-extern.o -o /dev/null 2>&1 | \
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# RUN: FileCheck %s --check-prefix=AUTOHIDE-PRIVATE
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## Test that exported hidden symbols are still treated as a liveness root.
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## This previously used to crash when enabling -dead_strip since it's unconventional
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## to add treat private extern symbols as a liveness root.
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# RUN: %no-fatal-warnings-lld -dylib -exported_symbol "_foo" %t/autohide-private-extern.o \
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# RUN: -dead_strip -o %t/exported-hidden
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# RUN: llvm-nm -m %t/exported-hidden | FileCheck %s --check-prefix=AUTOHIDE-PRIVATE-DEAD-STRIP
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# RUN: %no-fatal-warnings-lld -dylib -exported_symbol "_foo" %t/autohide.o \
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# RUN: -dead_strip %t/glob-private-extern.o -o %t/exported-hidden
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# RUN: llvm-nm -m %t/exported-hidden | FileCheck %s --check-prefix=AUTOHIDE-PRIVATE-DEAD-STRIP
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# RUN: %no-fatal-warnings-lld -dylib -exported_symbol "_foo" %t/autohide.o \
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# RUN: -dead_strip %t/weak-private-extern.o -o %t/exported-hidden
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# RUN: llvm-nm -m %t/exported-hidden | FileCheck %s --check-prefix=AUTOHIDE-PRIVATE-DEAD-STRIP
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# EXP-AUTOHIDE: T _foo
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# AUTOHIDE-PRIVATE: error: cannot export hidden symbol _foo
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# AUTOHIDE-PRIVATE-DEAD-STRIP: (__TEXT,__text) non-external (was a private external) _foo
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## Test not exporting any symbols
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# RUN: %lld -dylib %t/symdefs.o -o %t/noexports -exported_symbols_list /dev/null
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# RUN: llvm-objdump --macho --exports-trie %t/noexports | FileCheck --check-prefix=NOEXPORTS %s
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# RUN: %lld -dylib %t/symdefs.o -o %t/noexports -no_exported_symbols
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# RUN: llvm-objdump --macho --exports-trie %t/noexports | FileCheck --check-prefix=NOEXPORTS %s
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# NOEXPORTS-NOT: globby_also
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# NOEXPORTS-NOT: globby_only
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# NOEXPORTS-NOT: literal_also
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# NOEXPORTS-NOT: literal_only
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#--- default.s
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.globl _keep_globl, _hide_globl
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_keep_globl:
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retq
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_hide_globl:
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retq
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.private_extern _private_extern
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_private_extern:
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retq
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_private:
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retq
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#--- lazydef.s
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.globl _keep_lazy
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_keep_lazy:
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retq
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#--- symdefs.s
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.globl literal_only, literal_also, globby_only, globby_also
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literal_only:
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retq
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literal_also:
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retq
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globby_only:
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retq
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globby_also:
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retq
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#--- literals.txt
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literal_only # comment
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literal_also
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# globby_only
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globby_also
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#--- globbys.txt
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# literal_only
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l?ter[aeiou]l_*[^y] # comment
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*gl?bby_*
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#--- autohide.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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#--- autohide-private-extern.s
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.globl _foo
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.weak_def_can_be_hidden _foo
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.private_extern _foo
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_foo:
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retq
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#--- glob-private-extern.s
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.global _foo
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.private_extern _foo
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_foo:
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retq
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#--- weak-private-extern.s
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.global _foo
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.weak_definition _foo
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.private_extern _foo
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_foo:
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retq
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