[llvm-readobj][test] - Improve dyn-symbols.test.

[grimar]

Summary

This removes the precompiled binary used, simplifies
the first test case, adds comments and llvm-readelf tool
invocations.
It also adds a test case for checking versioning symbols.

[jhenderson]

llvm/test/tools/llvm-readobj/ELF/dyn-symbols.test

1–2

As mentioned elsewhere, I'd rephrase the top-level comment "In this test we test that dynamic symbols are dumped as expected."

Also, you could simplify the case-level comments to "Case 1: Dynamic symbol table found via the DT_SYMTAB dynamic tag."

And remove the blank line after the case-level comment.

By the way, what in this test case forces the dynamic tag to be used and no the section header?

61–62

Is this bit necessary?

Also, at a glance, the addresses look like they could get messed up (two sections have address 0). I'd suggest using a non-zero address for .dynsym.

93

Do we have testing elsewhere for dynamic symbol dumping of symbols with version strings like this?

[grimar]

• Addressed review comments.

llvm/test/tools/llvm-readobj/ELF/dyn-symbols.test

1–2

By the way, what in this test case forces the dynamic tag to be used and no the section header?

Our logic at first finds a section header and then overrides the data with the data read
with use of dynamic tag.
(https://github.com/llvm-mirror/llvm/blob/master/tools/llvm-readobj/ELFDumper.cpp#L1735)

If something went wrong with the location found then we would report a warning:
"SHT_DYNSYM section header and DT_SYMTAB disagree about the location of the dynamic symbol table"
That is why I used "--implicit-check-not="warning:"".

But note, that we still need the section header, because we take a size of a dynamic symbol table from there.
There is no dynamic tag that allows us to get size.

61–62

It works without that, but I would like to be a bit more explicit here, since we refer to .dynsym from program headers.
I've added Address: 0x100 as you suggested, though it is not really important here.
It is only important for program header to have a proper p_offset such that Phdr.p_offset + VAddr - Phdr.p_vaddr == offset of .dynsym.
(https://github.com/llvm-mirror/llvm/blob/master/lib/Object/ELF.cpp#L557)

93

No. And here it was not tested properly too. I've added a new test case for that.

[jhenderson]

LGTM.

llvm/test/tools/llvm-readobj/ELF/dyn-symbols.test

68

Doesn't this need to be 0x100 too? Possibly not strictly, but otherwise the VAddr viewed via the program header won't match that in the section header. The tag would need updating too.

[grimar]

llvm/test/tools/llvm-readobj/ELF/dyn-symbols.test

68

but otherwise the VAddr viewed via the program header won't match that in the section header.

Right, but isn't that good for this test? We are trying to test that "dynamic symbol table found via the DT_SYMTAB dynamic tag".
Ideally we do not want to have a section header at all (but we can't).

[jhenderson]

llvm/test/tools/llvm-readobj/ELF/dyn-symbols.test

68

I'm just thinking that the section mapping produced by something like llvm-readelf is going to show the dynsym as not in the program header, if I'm not mistaken, which could get confusing if anybody debugs this test in the future.

I'm okay with no addresses being set at all. I just think it needs to be consistent.

[MaskRay]

llvm/test/tools/llvm-readobj/ELF/dyn-symbols.test

76

cmp

llvm/test/tools/llvm-readobj/ELF/Inputs/dynamic-table.c

-// clang -target x86_64-linux-gnu -shared -fPIC -lc dynamic-table.c \
-//       -o dynamic-table-so.x86 -Wl,-f,aux.so -Wl,-F,filter.so
 // clang -target mipsel-linux-gnu -shared -fPIC -lc dynamic-table.c \
 //       -o dynamic-table-so.mips
 // clang -target mipsel-linux-gnu -lc dynamic-table.c \
 //       -o dynamic-table-exe.mips
 int puts(const char *);
 
 __thread int foo;
 
 int main(void) {
   puts("Hello, World");
   foo = 0;
 }

llvm/test/tools/llvm-readobj/ELF/dyn-symbols.test

-# RUN: llvm-readobj --dyn-symbols %p/Inputs/dynamic-table-so.x86 | FileCheck %s
+## In this test we test that dynamic symbols are dumped as expected.
 
-## Check the two-letter alias --dt is equivalent to the --dyn-symbols full flag
-## name.
+## Case 1: Dynamic symbol table found via the DT_SYMTAB dynamic tag.
+# RUN: yaml2obj --docnum=1 %s -o %t1.so
+# RUN: llvm-readobj --dyn-symbols %t1.so 2>&1 \
+# RUN:   | FileCheck %s --implicit-check-not="warning:" --check-prefix=DYNSYMS-LLVM
+# RUN: llvm-readelf --dyn-symbols %t1.so 2>&1 \
+# RUN:   | FileCheck %s --implicit-check-not="warning:" --check-prefix=DYNSYMS-GNU
+
+# DYNSYMS-LLVM:      DynamicSymbols [
+# DYNSYMS-LLVM-NEXT:   Symbol {
+# DYNSYMS-LLVM-NEXT:     Name:  (0)
+# DYNSYMS-LLVM-NEXT:     Value: 0x0
+# DYNSYMS-LLVM-NEXT:     Size: 0
+# DYNSYMS-LLVM-NEXT:     Binding: Local (0x0)
+# DYNSYMS-LLVM-NEXT:     Type: None (0x0)
+# DYNSYMS-LLVM-NEXT:     Other: 0
+# DYNSYMS-LLVM-NEXT:     Section: Undefined (0x0)
+# DYNSYMS-LLVM-NEXT:   }
+# DYNSYMS-LLVM-NEXT:   Symbol {
+# DYNSYMS-LLVM-NEXT:     Name: foo (5)
+# DYNSYMS-LLVM-NEXT:     Value: 0x0
+# DYNSYMS-LLVM-NEXT:     Size: 0
+# DYNSYMS-LLVM-NEXT:     Binding: Local (0x0)
+# DYNSYMS-LLVM-NEXT:     Type: None (0x0)
+# DYNSYMS-LLVM-NEXT:     Other: 0
+# DYNSYMS-LLVM-NEXT:     Section: Undefined (0x0)
+# DYNSYMS-LLVM-NEXT:   }
+# DYNSYMS-LLVM-NEXT:   Symbol {
+# DYNSYMS-LLVM-NEXT:     Name: bar (1)
+# DYNSYMS-LLVM-NEXT:     Value: 0x0
+# DYNSYMS-LLVM-NEXT:     Size: 0
+# DYNSYMS-LLVM-NEXT:     Binding: Local (0x0)
+# DYNSYMS-LLVM-NEXT:     Type: None (0x0)
+# DYNSYMS-LLVM-NEXT:     Other: 0
+# DYNSYMS-LLVM-NEXT:     Section: Undefined (0x0)
+# DYNSYMS-LLVM-NEXT:   }
+# DYNSYMS-LLVM-NEXT: ]
+
+# DYNSYMS-GNU:      Symbol table '.dynsym' contains 3 entries:
+# DYNSYMS-GNU-NEXT:  Num:    Value          Size Type    Bind   Vis       Ndx Name
+# DYNSYMS-GNU-NEXT:    0: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT   UND
+# DYNSYMS-GNU-NEXT:    1: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT   UND foo
+# DYNSYMS-GNU-NEXT:    2: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT   UND bar
 
-# RUN: llvm-readobj --dt %p/Inputs/dynamic-table-so.x86 > %t.readobj-dt-alias
-# RUN: llvm-readobj --dyn-symbols %p/Inputs/dynamic-table-so.x86 > %t.readobj-dt-no-alias
-# RUN: diff %t.readobj-dt-alias %t.readobj-dt-no-alias
-
-# CHECK:      DynamicSymbols [
-# CHECK-NEXT:   Symbol {
-# CHECK-NEXT:     Name:
-# CHECK-NEXT:     Value: 0x0
-# CHECK-NEXT:     Size: 0
-# CHECK-NEXT:     Binding: Local
-# CHECK-NEXT:     Type: None
-# CHECK-NEXT:     Other: 0
-# CHECK-NEXT:     Section: Undefined
-# CHECK-NEXT:   }
-# CHECK-NEXT:   Symbol {
-# CHECK-NEXT:     Name:
-# CHECK-NEXT:     Value: 0x618
-# CHECK-NEXT:     Size: 0
-# CHECK-NEXT:     Binding: Local
-# CHECK-NEXT:     Type: Section
-# CHECK-NEXT:     Other: 0
-# CHECK-NEXT:     Section: .init
-# CHECK-NEXT:   }
-# CHECK-NEXT:   Symbol {
-# CHECK-NEXT:     Name:
-# CHECK-NEXT:     Value: 0x200DC0
-# CHECK-NEXT:     Size: 0
-# CHECK-NEXT:     Binding: Local
-# CHECK-NEXT:     Type: Section
-# CHECK-NEXT:     Other: 0
-# CHECK-NEXT:     Section: .tbss
-# CHECK-NEXT:   }
-# CHECK-NEXT:   Symbol {
-# CHECK-NEXT:     Name: _ITM_deregisterTMCloneTable{{ }}
-# CHECK-NEXT:     Value: 0x0
-# CHECK-NEXT:     Size: 0
-# CHECK-NEXT:     Binding: Weak
-# CHECK-NEXT:     Type: None
-# CHECK-NEXT:     Other: 0
-# CHECK-NEXT:     Section: Undefined
-# CHECK-NEXT:   }
-# CHECK-NEXT:   Symbol {
-# CHECK-NEXT:     Name: puts@GLIBC_2.2.5{{ }}
-# CHECK-NEXT:     Value: 0x0
-# CHECK-NEXT:     Size: 0
-# CHECK-NEXT:     Binding: Global
-# CHECK-NEXT:     Type: Function
-# CHECK-NEXT:     Other: 0
-# CHECK-NEXT:     Section: Undefined
-# CHECK-NEXT:   }
-# CHECK-NEXT:   Symbol {
-# CHECK-NEXT:     Name: __tls_get_addr@GLIBC_2.3{{ }}
-# CHECK-NEXT:     Value: 0x0
-# CHECK-NEXT:     Size: 0
-# CHECK-NEXT:     Binding: Global
-# CHECK-NEXT:     Type: Function
-# CHECK-NEXT:     Other: 0
-# CHECK-NEXT:     Section: Undefined
-# CHECK-NEXT:   }
-# CHECK-NEXT:   Symbol {
-# CHECK-NEXT:     Name: __gmon_start__{{ }}
-# CHECK-NEXT:     Value: 0x0
-# CHECK-NEXT:     Size: 0
-# CHECK-NEXT:     Binding: Weak
-# CHECK-NEXT:     Type: None
-# CHECK-NEXT:     Other: 0
-# CHECK-NEXT:     Section: Undefined
-# CHECK-NEXT:   }
-# CHECK-NEXT:   Symbol {
-# CHECK-NEXT:     Name: _Jv_RegisterClasses{{ }}
-# CHECK-NEXT:     Value: 0x0
-# CHECK-NEXT:     Size: 0
-# CHECK-NEXT:     Binding: Weak
-# CHECK-NEXT:     Type: None
-# CHECK-NEXT:     Other: 0
-# CHECK-NEXT:     Section: Undefined
-# CHECK-NEXT:   }
-# CHECK-NEXT:   Symbol {
-# CHECK-NEXT:     Name: _ITM_registerTMCloneTable{{ }}
-# CHECK-NEXT:     Value: 0x0
-# CHECK-NEXT:     Size: 0
-# CHECK-NEXT:     Binding: Weak
-# CHECK-NEXT:     Type: None
-# CHECK-NEXT:     Other: 0
-# CHECK-NEXT:     Section: Undefined
-# CHECK-NEXT:   }
-# CHECK-NEXT:   Symbol {
-# CHECK-NEXT:     Name: __cxa_finalize@GLIBC_2.2.5{{ }}
-# CHECK-NEXT:     Value: 0x0
-# CHECK-NEXT:     Size: 0
-# CHECK-NEXT:     Binding: Weak
-# CHECK-NEXT:     Type: Function
-# CHECK-NEXT:     Other: 0
-# CHECK-NEXT:     Section: Undefined
-# CHECK-NEXT:   }
-# CHECK-NEXT:   Symbol {
-# CHECK-NEXT:     Name: _edata{{ }}
-# CHECK-NEXT:     Value: 0x201030
-# CHECK-NEXT:     Size: 0
-# CHECK-NEXT:     Binding: Global
-# CHECK-NEXT:     Type: None
-# CHECK-NEXT:     Other: 0
-# CHECK-NEXT:     Section: .data
-# CHECK-NEXT:   }
-# CHECK-NEXT:   Symbol {
-# CHECK-NEXT:     Name: foo{{ }}
-# CHECK-NEXT:     Value: 0x0
-# CHECK-NEXT:     Size: 4
-# CHECK-NEXT:     Binding: Global
-# CHECK-NEXT:     Type: TLS
-# CHECK-NEXT:     Other: 0
-# CHECK-NEXT:     Section: .tbss
-# CHECK-NEXT:   }
-# CHECK-NEXT:   Symbol {
-# CHECK-NEXT:     Name: _end{{ }}
-# CHECK-NEXT:     Value: 0x201038
-# CHECK-NEXT:     Size: 0
-# CHECK-NEXT:     Binding: Global
-# CHECK-NEXT:     Type: None
-# CHECK-NEXT:     Other: 0
-# CHECK-NEXT:     Section: .bss
-# CHECK-NEXT:   }
-# CHECK-NEXT:   Symbol {
-# CHECK-NEXT:     Name: __bss_start{{ }}
-# CHECK-NEXT:     Value: 0x201030
-# CHECK-NEXT:     Size: 0
-# CHECK-NEXT:     Binding: Global
-# CHECK-NEXT:     Type: None
-# CHECK-NEXT:     Other: 0
-# CHECK-NEXT:     Section: .bss
-# CHECK-NEXT:   }
-# CHECK-NEXT:   Symbol {
-# CHECK-NEXT:     Name: main{{ }}
-# CHECK-NEXT:     Value: 0x780
-# CHECK-NEXT:     Size: 59
-# CHECK-NEXT:     Binding: Global
-# CHECK-NEXT:     Type: Function
-# CHECK-NEXT:     Other: 0
-# CHECK-NEXT:     Section: .text
-# CHECK-NEXT:   }
-# CHECK-NEXT:   Symbol {
-# CHECK-NEXT:     Name: _init{{ }}
-# CHECK-NEXT:     Value: 0x618
-# CHECK-NEXT:     Size: 0
-# CHECK-NEXT:     Binding: Global
-# CHECK-NEXT:     Type: Function
-# CHECK-NEXT:     Other: 0
-# CHECK-NEXT:     Section: .init
-# CHECK-NEXT:   }
-# CHECK-NEXT:   Symbol {
-# CHECK-NEXT:     Name: _fini{{ }}
-# CHECK-NEXT:     Value: 0x7BC
-# CHECK-NEXT:     Size: 0
-# CHECK-NEXT:     Binding: Global
-# CHECK-NEXT:     Type: Function
-# CHECK-NEXT:     Other: 0
-# CHECK-NEXT:     Section: .fini
-# CHECK-NEXT:   }
-# CHECK-NEXT: ]
+--- !ELF
+FileHeader:
+  Class:   ELFCLASS64
+  Data:    ELFDATA2LSB
+  Type:    ET_DYN
+  Machine: EM_X86_64
+Sections:
+  - Name:    .dynamic
+    Type:    SHT_DYNAMIC
+    Entries:
+      - Tag:   DT_SYMTAB
+        Value: 0x100
+      - Tag:   DT_NULL
+        Value: 0
+  - Name:    .dynsym
+    Type:    SHT_DYNSYM
+    Address: 0x100
+DynamicSymbols:
+  - Name: foo
+  - Name: bar
+ProgramHeaders:
+  - Type: PT_LOAD
+    VAddr: 0x100
+    Sections:
+      - Section: .dynsym
 
-## Check that we are able to dump the dynamic symbol table even when we have no program headers.
-## In this case we find the table by it's type (SHT_DYNSYM) and ignore the DT_SYMTAB value.
+## Case 2: Check the two-letter alias --dt is equivalent to the --dyn-symbols
+## full flag name.
+# RUN: llvm-readobj --dt %t1.so > %t.readobj-dt-alias
+# RUN: llvm-readobj --dyn-symbols %t1.so > %t.readobj-dt-no-alias
+# RUN: cmp %t.readobj-dt-alias %t.readobj-dt-no-alias
 
-# RUN: yaml2obj --docnum=1 %s -o %t1.so
-# RUN: llvm-readobj %t1.so --dyn-symbols | FileCheck %s --check-prefix=NOPHDRS
+## Case 3: Check that we are able to dump the dynamic symbol table even when we have no program headers.
+## In this case we find the table by it's type (SHT_DYNSYM) and ignore the DT_SYMTAB value.
+# RUN: yaml2obj --docnum=2 %s -o %t2.so
+# RUN: llvm-readobj %t2.so --dyn-symbols | FileCheck %s --check-prefix=NOPHDRS-LLVM
+# RUN: llvm-readelf %t2.so --dyn-symbols | FileCheck %s --check-prefix=NOPHDRS-GNU
 
-# NOPHDRS: Name: foo
+# NOPHDRS-LLVM: Name: foo
+# NOPHDRS-GNU:  1: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND foo
 
 --- !ELF
 FileHeader:
   Class:   ELFCLASS64
   Data:    ELFDATA2LSB
   Type:    ET_DYN
   Machine: EM_X86_64
 Sections:
   - Name:    .dynamic
     Type:    SHT_DYNAMIC
     Entries:
       - Tag:   DT_SYMTAB
         Value: 0xffff1234
       - Tag:   DT_NULL
         Value: 0
 DynamicSymbols:
   - Name: foo
 
-## Check we report a warning when there is no SHT_DYNSYM section and we can't map the DT_SYMTAB value
+## Case 4: Check we report a warning when there is no SHT_DYNSYM section and we can't map the DT_SYMTAB value
 ## to an address because of the absence of a corresponding PT_LOAD program header.
-
-# RUN: yaml2obj --docnum=2 %s -o %t2.so
-# RUN: llvm-readobj %t2.so --dyn-symbols 2>&1 | FileCheck %s -DFILE=%t2.so --check-prefix=NOSHT-DYNSYM
+# RUN: yaml2obj --docnum=3 %s -o %t3.so
+# RUN: llvm-readobj %t3.so --dyn-symbols 2>&1 | FileCheck %s -DFILE=%t3.so --check-prefixes=NOSHT-DYNSYM,NOSHT-DYNSYM-LLVM
+# RUN: llvm-readelf %t3.so --dyn-symbols 2>&1 | FileCheck %s -DFILE=%t3.so --check-prefix=NOSHT-DYNSYM
 
-# NOSHT-DYNSYM: warning: '[[FILE]]': Unable to parse DT_SYMTAB: virtual address is not in any segment: 0x0
-# NOSHT-DYNSYM:      DynamicSymbols [
-# NOSHT-DYNSYM-NEXT: ]
+# NOSHT-DYNSYM:           warning: '[[FILE]]': Unable to parse DT_SYMTAB: virtual address is not in any segment: 0x0
+# NOSHT-DYNSYM-LLVM:      DynamicSymbols [
+# NOSHT-DYNSYM-LLVM-NEXT: ]
 
 --- !ELF
 FileHeader:
   Class:   ELFCLASS64
   Data:    ELFDATA2LSB
   Type:    ET_DYN
   Machine: EM_X86_64
 Sections:
   - Name:    .dynsym
     Type:    SHT_PROGBITS
   - Name:    .dynamic
     Type:    SHT_DYNAMIC
     Entries:
       - Tag:   DT_SYMTAB
         Value: 0
       - Tag:   DT_NULL
         Value: 0
 DynamicSymbols:
   - Name: foo
 
-## Check that when we can't map the value of the DT_SYMTAB tag to an address, we report a warning and
+## Case 5: Check that when we can't map the value of the DT_SYMTAB tag to an address, we report a warning and
 ## use the information in the section header table to locate the dynamic symbol table.
-
-# RUN: yaml2obj --docnum=3 %s -o %t3.so
-# RUN: llvm-readobj %t3.so --dyn-symbols 2>&1 | FileCheck -DFILE=%t3.so %s --check-prefix=BROKEN-DTSYMTAB
+# RUN: yaml2obj --docnum=4 %s -o %t4.so
+# RUN: llvm-readobj %t4.so --dyn-symbols 2>&1 | FileCheck -DFILE=%t4.so %s --check-prefixes=BROKEN-DTSYMTAB,BROKEN-DTSYMTAB-LLVM
+# RUN: llvm-readelf %t4.so --dyn-symbols 2>&1 | FileCheck -DFILE=%t4.so %s --check-prefixes=BROKEN-DTSYMTAB,BROKEN-DTSYMTAB-GNU
 
-# BROKEN-DTSYMTAB: warning: '[[FILE]]': Unable to parse DT_SYMTAB: virtual address is not in any segment: 0xffff1234
-# BROKEN-DTSYMTAB: Name: foo
+# BROKEN-DTSYMTAB:      warning: '[[FILE]]': Unable to parse DT_SYMTAB: virtual address is not in any segment: 0xffff1234
+# BROKEN-DTSYMTAB-LLVM: Name: foo
+# BROKEN-DTSYMTAB-GNU:  1: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT   UND foo
 
 --- !ELF
 FileHeader:
   Class:   ELFCLASS64
   Data:    ELFDATA2LSB
   Type:    ET_DYN
   Machine: EM_X86_64
 Sections:
   - Name:    .dynamic
     Type:    SHT_DYNAMIC
     Entries:
       - Tag:   DT_SYMTAB
         Value: 0xffff1234
       - Tag:   DT_NULL
         Value: 0
 DynamicSymbols:
   - Name: foo
 ProgramHeaders:
   - Type: PT_LOAD
     VAddr: 0x0000
     Sections:
       - Section: .dynsym
 
-## Check that if we can get the location of the dynamic symbol table using both the DT_SYMTAB value
+## Case 6: Check that if we can get the location of the dynamic symbol table using both the DT_SYMTAB value
 ## and the section headers table then we prefer the former and report a warning.
-
-# RUN: yaml2obj --docnum=4 %s -o %t4.so
-# RUN: llvm-readobj %t4.so --dyn-symbols 2>&1 | FileCheck -DFILE=%t4.so %s --check-prefix=PREFER-DTSYMTAB
+# RUN: yaml2obj --docnum=5 %s -o %t5.so
+# RUN: llvm-readobj %t5.so --dyn-symbols 2>&1 | FileCheck -DFILE=%t5.so %s --check-prefixes=PREFER-DTSYMTAB,PREFER-DTSYMTAB-LLVM
+# RUN: llvm-readelf %t5.so --dyn-symbols 2>&1 | FileCheck -DFILE=%t5.so %s --check-prefixes=PREFER-DTSYMTAB,PREFER-DTSYMTAB-GNU
 
-# PREFER-DTSYMTAB: warning: '[[FILE]]': SHT_DYNSYM section header and DT_SYMTAB disagree about the location of the dynamic symbol table
-# PREFER-DTSYMTAB: Name: o
+# PREFER-DTSYMTAB:      warning: '[[FILE]]': SHT_DYNSYM section header and DT_SYMTAB disagree about the location of the dynamic symbol table
+# PREFER-DTSYMTAB-LLVM: Name: o
+# PREFER-DTSYMTAB-GNU:  1: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT   UND o
 
 --- !ELF
 FileHeader:
   Class:   ELFCLASS64
   Data:    ELFDATA2LSB
   Type:    ET_DYN
   Machine: EM_X86_64
 Sections:
## The Content describes 2 symbols: zero symbol and symbol with st_name == 3.
     Content: "000000000000000000000000000000000000000000000000030000000000000000000000000000000000000000000000"
 DynamicSymbols:
   - Name: foo
 ProgramHeaders:
   - Type: PT_LOAD
     VAddr: 0x0000
     Sections:
       - Section: .mydynsym
+
+## Case 7: Check how we dump versioned symbols. Use both -V and --dyn-symbols
+## to check that printed version is consistent.
+# RUN: yaml2obj %s --docnum=6 -o %t6
+# RUN: llvm-readobj -V --dyn-symbols %t6 | FileCheck %s --check-prefix=VERSIONED-LLVM
+# RUN: llvm-readelf -V --dyn-symbols %t6 | FileCheck %s --check-prefix=VERSIONED-GNU
+
+# VERSIONED-LLVM:      Symbol {
+# VERSIONED-LLVM:        Name: foo (16)
+# VERSIONED-LLVM-NEXT:   Value: 0x0
+# VERSIONED-LLVM-NEXT:   Size: 0
+# VERSIONED-LLVM-NEXT:   Binding: Local (0x0)
+# VERSIONED-LLVM-NEXT:   Type: None (0x0)
+# VERSIONED-LLVM-NEXT:   Other: 0
+# VERSIONED-LLVM-NEXT:   Section: Undefined (0x0)
+# VERSIONED-LLVM-NEXT: }
+# VERSIONED-LLVM-NEXT: Symbol {
+# VERSIONED-LLVM-NEXT:   Name: bar@@Default (12)
+# VERSIONED-LLVM-NEXT:   Value: 0x0
+# VERSIONED-LLVM-NEXT:   Size: 0
+# VERSIONED-LLVM-NEXT:   Binding: Local (0x0)
+# VERSIONED-LLVM-NEXT:   Type: None (0x0)
+# VERSIONED-LLVM-NEXT:   Other: 0
+# VERSIONED-LLVM-NEXT:   Section: Undefined (0x0)
+# VERSIONED-LLVM-NEXT: }
+# VERSIONED-LLVM-NEXT: Symbol {
+# VERSIONED-LLVM-NEXT:   Name: zed@NonDefault (20)
+# VERSIONED-LLVM-NEXT:   Value: 0x0
+# VERSIONED-LLVM-NEXT:   Size: 0
+# VERSIONED-LLVM-NEXT:   Binding: Local (0x0)
+# VERSIONED-LLVM-NEXT:   Type: None (0x0)
+# VERSIONED-LLVM-NEXT:   Other: 0
+# VERSIONED-LLVM-NEXT:   Section: Undefined (0x0)
+# VERSIONED-LLVM-NEXT: }
+# VERSIONED-LLVM: VersionSymbols [
+# VERSIONED-LLVM:  Name: foo
+# VERSIONED-LLVM:  Name: bar@@Default
+# VERSIONED-LLVM:  Name: zed@NonDefault
+
+# VERSIONED-GNU:      Num:    Value          Size Type    Bind   Vis       Ndx Name
+# VERSIONED-GNU:        1: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT   UND foo
+# VERSIONED-GNU-NEXT:   2: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT   UND bar@@Default
+# VERSIONED-GNU-NEXT:   3: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT   UND zed@NonDefault
+# VERSIONED-GNU:      000:   0 (*local*) 1 (*global*) 2 (Default) 3h(NonDefault)
+
+--- !ELF
+FileHeader:
+  Class:   ELFCLASS64
+  Data:    ELFDATA2LSB
+  Type:    ET_DYN
+  Machine: EM_X86_64
+Sections:
+  - Name:         .gnu.version
+    Type:         SHT_GNU_versym
+    Flags:        [ SHF_ALLOC ]
+    Link:         .dynsym
+    AddressAlign: 0x2
+    EntSize:      0x2
+## 0x8000 is a special VERSYM_HIDDEN bit.
+    Entries:      [ 0, 1, 2, 0x8003 ]
+  - Name:         .gnu.version_d
+    Type:         SHT_GNU_verdef
+    Flags:        [ SHF_ALLOC ]
+    Link:         .dynstr
+    AddressAlign: 0x4
+    Info:         0x2
+    Entries:
+      - Version:    1
+        Flags:      0
+        VersionNdx: 2
+        Hash:       0
+        Names:
+          - Default
+      - Version:    1
+        Flags:      0
+        VersionNdx: 3
+        Hash:       0
+        Names:
+          - NonDefault
+DynamicSymbols:
+  - Name: foo
+  - Name: bar
+  - Name: zed