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llvm-project/lld/test/mach-o/dead-strip-globals.yaml

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Have one version of libSystem for each arch. NFC. An upcoming commit will change how we choose to reference a dylib. Currently dylibs are only given an LC_LOAD_DYLIB in the final image if an atom is used. This is different from ld64 which adds the load command when the dylib is referenced on the cmdline. In order to change this behaviour, we need libSystem.yaml to actually contain a mach header so that it is parsed as a dylib, instead of currently being parsed as a normalised file. To get a mach header, we also require an arch, so now we have one libsystem per arch and all the tests have been updated to choose the correct one. llvm-svn: 278372
2016-08-12 02:08:59 +08:00
# RUN: lld -flavor darwin -arch x86_64 -dead_strip -export_dynamic %s -dylib %p/Inputs/x86_64/libSystem.yaml -o %t.dylib -print_atoms | FileCheck -check-prefix=CHECK1 %s
# RUN: lld -flavor darwin -arch x86_64 -export_dynamic -dead_strip %s -dylib %p/Inputs/x86_64/libSystem.yaml -o %t.dylib -print_atoms | FileCheck -check-prefix=CHECK1 %s
# RUN: lld -flavor darwin -arch x86_64 -dead_strip %s -dylib %p/Inputs/x86_64/libSystem.yaml -o %t2.dylib -print_atoms | FileCheck -check-prefix=CHECK2 %s
Add support for export_dynamic cmdline option and behaviour. This option matches the behaviour of ld64, that is it prevents globals from being dead stripped in executables and dylibs. Reviewed by Lang Hames Differential Revision: http://reviews.llvm.org/D16026 llvm-svn: 258554
2016-01-23 05:13:24 +08:00
Dead strip DESC bits should only be set on object files. It only makes sense to set on N_NO_DEAD_STRIP on a relocatable object file. Otherwise the bits aren't useful for anything. Matches the ld64 behaviour. llvm-svn: 278419
2016-08-12 05:27:18 +08:00
# RUN: lld -flavor darwin -arch x86_64 -r %s -dylib %p/Inputs/x86_64/libSystem.yaml -o %t3.o
# RUN: llvm-nm -m %t3.o | FileCheck -check-prefix=RELOCATABLE_SYMBOLS %s
Add support for export_dynamic cmdline option and behaviour. This option matches the behaviour of ld64, that is it prevents globals from being dead stripped in executables and dylibs. Reviewed by Lang Hames Differential Revision: http://reviews.llvm.org/D16026 llvm-svn: 258554
2016-01-23 05:13:24 +08:00
#
# Test that -export_dynamic -dead-strip from removing globals.
#
---
defined-atoms:
- name: def
scope: global
dead-strip: never
- name: dead
scope: global
shared-library-atoms:
- name: dyld_stub_binder
load-name: /usr/lib/libSystem.B.dylib
type: unknown
...
# CHECK1: name: def
# CHECK1: name: dead
# CHECK2: name: def
# CHECK2-NOT: name: dead
Dead strip DESC bits should only be set on object files. It only makes sense to set on N_NO_DEAD_STRIP on a relocatable object file. Otherwise the bits aren't useful for anything. Matches the ld64 behaviour. llvm-svn: 278419
2016-08-12 05:27:18 +08:00
# RELOCATABLE_SYMBOLS: external def