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[llvm-objcopy][MachO] Implement --strip-debug 

Reviewed By: alexshap

Differential Revision: https://reviews.llvm.org/D70476
This commit is contained in:
Fangrui Song 2019-11-18 15:25:04 -08:00 committed by Fangrui Song
parent 242002770b
commit 30ccee71ca
2 changed files with 41 additions and 3 deletions
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38
llvm/test/tools/llvm-objcopy/MachO/strip-debug.test Normal file
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@ -0,0 +1,38 @@
## Show that llvm-objcopy/llvm-strip removes all symbols and debug sections.
# RUN: yaml2obj %p/Inputs/strip-all-with-dwarf.yaml -o %t
# RUN: llvm-objcopy --strip-debug %t %t.stripped
# RUN: llvm-readobj --sections %t.stripped | FileCheck /dev/null --check-prefix=NODWARF \
# RUN: --implicit-check-not='Name: __debug' --implicit-check-not='Name: __apple'
## Make sure that all symbols are kept.
# RUN: llvm-readobj --symbols %t | FileCheck %s --check-prefix=SYM
# RUN: llvm-readobj --symbols %t.stripped | FileCheck %s --check-prefix=SYM
# SYM: Symbols [
# SYM-COUNT-3: Symbol
# SYM: ]
## Make sure that all relocations to non-debug sections are kept.
# RUN: llvm-readobj -r %t | FileCheck %s --check-prefixes=RELOC,DEBUG
# RUN: llvm-readobj -r %t.stripped | FileCheck %s --check-prefix=RELOC
# RELOC: Relocations [
# RELOC-NEXT: Section __text {
# RELOC-NEXT: 0x0 0 0 0 X86_64_RELOC_UNSIGNED 0 -
# RELOC-NEXT: 0x0 0 0 0 X86_64_RELOC_UNSIGNED 0 -
# RELOC-NEXT: }
# DEBUG: Section __debug_info {
# DEBUG-NEXT: 0x0 0 0 0 X86_64_RELOC_UNSIGNED 0 -
# DEBUG-NEXT: 0x0 0 0 0 X86_64_RELOC_UNSIGNED 0 -
# DEBUG-NEXT: 0x0 0 0 0 X86_64_RELOC_UNSIGNED 0 -
# DEBUG-NEXT: 0x0 0 0 0 X86_64_RELOC_UNSIGNED 0 -
# DEBUG-NEXT: }
# RELOC-NEXT: Section __compact_unwind {
# RELOC-NEXT: 0x0 0 0 0 X86_64_RELOC_UNSIGNED 0 -
# RELOC-NEXT: }
# DEBUG-NEXT: Section __debug_line {
# DEBUG-NEXT: 0x0 0 0 0 X86_64_RELOC_UNSIGNED 0 -
# DEBUG-NEXT: }
# RELOC-NEXT: ]

6
llvm/tools/llvm-objcopy/MachO/MachOObjcopy.cpp
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@ -29,7 +29,7 @@ static void removeSections(const CopyConfig &Config, Object &Obj) {
};
}
if (Config.StripAll) {
if (Config.StripAll || Config.StripDebug) {
// Remove all debug sections.
RemovePred = [RemovePred](const Section &Sec) {
if (Sec.Segname == "__DWARF")
@ -99,8 +99,8 @@ static Error handleArgs(const CopyConfig &Config, Object &Obj) {
Config.ExtractDWO || Config.KeepFileSymbols || Config.LocalizeHidden ||
Config.PreserveDates || Config.StripAllGNU || Config.StripDWO ||
Config.StripNonAlloc || Config.StripSections || Config.Weaken ||
Config.DecompressDebugSections || Config.StripDebug ||
Config.StripNonAlloc || Config.StripSections || Config.StripUnneeded ||
Config.DecompressDebugSections || Config.StripNonAlloc ||
Config.StripSections || Config.StripUnneeded ||
Config.DiscardMode != DiscardType::None || !Config.SymbolsToAdd.empty() ||
Config.EntryExpr) {
return createStringError(llvm::errc::invalid_argument,