diff options
Diffstat (limited to 'lld/test/MachO/common-symbol-resolution.s')
| -rw-r--r-- | lld/test/MachO/common-symbol-resolution.s | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/lld/test/MachO/common-symbol-resolution.s b/lld/test/MachO/common-symbol-resolution.s new file mode 100644 index 0000000..6cefe30 --- /dev/null +++ b/lld/test/MachO/common-symbol-resolution.s @@ -0,0 +1,113 @@ +# REQUIRES: x86 +# RUN: split-file %s %t + +# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %t/common.s -o %t/common.o +# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %t/weak-common.s -o %t/weak-common.o +# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %t/defined.s -o %t/defined.o +# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %t/weak-defined.s -o %t/weak-defined.o +# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %t/libfoo.s -o %t/libfoo.o +# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %t/test.s -o %t/test.o +# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %t/calls-foo.s -o %t/calls-foo.o + +# RUN: lld -flavor darwinnew -syslibroot %S/Inputs/MacOSX.sdk -lSystem -order_file %t/order -dylib %t/libfoo.o -o %t/libfoo.dylib + +# RUN: rm -f %t/defined.a %t/weak-defined-and-common.a +# RUN: llvm-ar rcs %t/defined.a %t/defined.o +# RUN: llvm-ar rcs %t/weak-defined-and-common.a %t/weak-defined.o %t/common.o + +## The weak attribute appears to have no effect on common symbols. Given two +## common symbols of the same name, we always pick the one with the larger size, +## regardless of whether it is weak. Moreover, the resolved symbol in the output +## file will always be non-weak, even if the winning input symbol definition was +## weak. +# RUN: lld -flavor darwinnew -syslibroot %S/Inputs/MacOSX.sdk -lSystem -order_file %t/order %t/common.o %t/weak-common.o %t/test.o -o %t/test +# RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=LARGER-COMMON +# RUN: lld -flavor darwinnew -syslibroot %S/Inputs/MacOSX.sdk -lSystem -order_file %t/order %t/weak-common.o %t/common.o %t/test.o -o %t/test +# RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=LARGER-COMMON + +## Defined symbols are the only ones that take precedence over common symbols. +# RUN: lld -flavor darwinnew -syslibroot %S/Inputs/MacOSX.sdk -lSystem -order_file %t/order %t/defined.o %t/common.o %t/test.o -o %t/test +# RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=DEFINED +# RUN: lld -flavor darwinnew -syslibroot %S/Inputs/MacOSX.sdk -lSystem -order_file %t/order %t/common.o %t/defined.o %t/test.o -o %t/test +# RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=DEFINED + +# RUN: lld -flavor darwinnew -syslibroot %S/Inputs/MacOSX.sdk -lSystem -order_file %t/order %t/weak-defined.o %t/common.o %t/test.o -o %t/test +# RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=WEAK-DEFINED +# RUN: lld -flavor darwinnew -syslibroot %S/Inputs/MacOSX.sdk -lSystem -order_file %t/order %t/common.o %t/weak-defined.o %t/test.o -o %t/test +# RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=WEAK-DEFINED + +## Common symbols take precedence over archive symbols. +# RUN: lld -flavor darwinnew -syslibroot %S/Inputs/MacOSX.sdk -lSystem -order_file %t/order %t/defined.a %t/weak-common.o %t/test.o -o %t/test +# RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=LARGER-COMMON +# RUN: lld -flavor darwinnew -syslibroot %S/Inputs/MacOSX.sdk -lSystem -order_file %t/order %t/weak-common.o %t/defined.a %t/test.o -o %t/test +# RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=LARGER-COMMON + +## If an archive has both a common and a defined symbol, the defined one should +## win. +# RUN: lld -flavor darwinnew -syslibroot %S/Inputs/MacOSX.sdk -lSystem -order_file %t/order %t/weak-defined-and-common.a %t/calls-foo.o -o %t/calls-foo +# RUN: llvm-objdump --syms %t/calls-foo | FileCheck %s --check-prefix=WEAK-DEFINED +# RUN: lld -flavor darwinnew -syslibroot %S/Inputs/MacOSX.sdk -lSystem -order_file %t/order %t/calls-foo.o %t/weak-defined-and-common.a -o %t/calls-foo +# RUN: llvm-objdump --syms %t/calls-foo | FileCheck %s --check-prefix=WEAK-DEFINED + +## Common symbols take precedence over dylib symbols. +# RUN: lld -flavor darwinnew -syslibroot %S/Inputs/MacOSX.sdk -lSystem -order_file %t/order %t/libfoo.dylib %t/weak-common.o %t/test.o -o %t/test +# RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=LARGER-COMMON +# RUN: lld -flavor darwinnew -syslibroot %S/Inputs/MacOSX.sdk -lSystem -order_file %t/order %t/weak-common.o %t/libfoo.dylib %t/test.o -o %t/test +# RUN: llvm-objdump --syms %t/test | FileCheck %s --check-prefix=LARGER-COMMON + +# LARGER-COMMON-LABEL: SYMBOL TABLE: +# LARGER-COMMON-DAG: [[#%x, FOO_ADDR:]] g O __DATA,__common _foo +# LARGER-COMMON-DAG: [[#FOO_ADDR + 2]] g O __DATA,__common _foo_end + +# DEFINED-LABEL: SYMBOL TABLE: +# DEFINED: g F __TEXT,__text _foo + +# WEAK-DEFINED-LABEL: SYMBOL TABLE: +# WEAK-DEFINED: w F __TEXT,__text _foo + +#--- order +## %t/order is important as we determine the size of a given symbol via the +## address of the next symbol. +_foo +_foo_end + +#--- common.s +.comm _foo, 1 + +.globl _bar +_bar: + +#--- weak-common.s +.weak_definition _foo +.comm _foo, 2 + +#--- defined.s +.globl _foo +_foo: + .quad 0x1234 + +#--- weak-defined.s +.globl _foo +.weak_definition _foo +_foo: + .quad 0x1234 + +#--- libfoo.s +.globl _foo +_foo: + .quad 0x1234 + +#--- test.s +.comm _foo_end, 1 + +.globl _main +_main: + ret + +#--- calls-foo.s +.comm _foo_end, 1 + +.globl _main +_main: + callq _foo + ret |