Many projects use this option. There are two ways to use it. You can
either a) Just use --strip-debug and keep the old file with debug
content or b) you can use --strip-debug, --only-keep-debug, and
--add-gnu-debuglink all in conjunction to create two separate files, the
stripped file and the debug file. --only-keep-debug is more complicated
than --strip-debug because it keeps the section headers without keeping
section contents. That's not really supported by llvm-objcopy at the
moment but I plan on adding it. So this change just supports a) and
options to support b) will come soon.
Differential Revision: https://reviews.llvm.org/D39919
llvm-svn: 318094
--- /dev/null
+# RUN: yaml2obj %s > %t
+# RUN: llvm-objcopy -strip-debug %t %t2
+# RUN: llvm-readobj -file-headers -sections -symbols %t2 | FileCheck %s
+
+!ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_REL
+ Machine: EM_X86_64
+Sections:
+ - Name: .debugfoo
+ Type: SHT_PROGBITS
+ Content: "00000000"
+ - Name: .text
+ Type: SHT_PROGBITS
+ Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
+ AddressAlign: 0x0000000000000010
+ Content: "00000000"
+Symbols:
+ Global:
+ - Name: foo
+ Section: .text
+ - Name: debugfoo
+ Section: .debugfoo
+
+# CHECK: SectionHeaderCount: 5
+
+# CHECK: Name: .text
+# CHECK: Name: .symtab
+# CHECK: Name: .strtab
+# CHECK: Name: .shstrtab
+
+# Check that *only* foo is copied and not debugfoo
+# CHECK: Symbols [
+# CHECK-NEXT: Symbol {
+# CHECK-NEXT: Name:
+# CHECK-NEXT: Value:
+# CHECK-NEXT: Size:
+# CHECK-NEXT: Binding:
+# CHECK-NEXT: Type:
+# CHECK-NEXT: Other:
+# CHECK-NEXT: Section: Undefined
+# CHECK-NEXT: }
+# CHECK-NEXT: Symbol {
+# CHECK-NEXT: Name: foo
+# CHECK-NEXT: Value:
+# CHECK-NEXT: Size:
+# CHECK-NEXT: Binding: Global
+# CHECK-NEXT: Type:
+# CHECK-NEXT: Other:
+# CHECK-NEXT: Section: .text
+# CHECK-NEXT: }
+# CHECK-NEXT: ]
cl::aliasopt(ToRemove));
static cl::opt<bool> StripAll("strip-all",
cl::desc("Removes symbol, relocation, and debug information"));
+static cl::opt<bool> StripDebug("strip-debug",
+ cl::desc("Removes all debug information"));
static cl::opt<bool> StripSections("strip-sections",
cl::desc("Remove all section headers"));
static cl::opt<bool>
Obj->WriteSectionHeaders = false;
}
+ if (StripDebug) {
+ RemovePred = [RemovePred](const SectionBase &Sec) {
+ return RemovePred(Sec) || Sec.Name.startswith(".debug");
+ };
+ }
+
Obj->removeSections(RemovePred);
Obj->finalize();
WriteObjectFile(*Obj, OutputFilename.getValue());