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llvm-mirror/test/tools/llvm-objdump/symbol-table-elf.test
George Rimar 60c8d3580e [yaml2obj][obj2yaml] - Change how symbol's binding is descibed when parsing/dumping.
Currently, YAML has the following syntax for describing the symbols:

Symbols:
  Local:
    LocalSymbol1:
    ...
    LocalSymbol2:
    ...
  ...
  Global:
    GlobalSymbol1:
  ...
  Weak:
  ...
  GNUUnique:

I.e. symbols are grouped by their bindings. That is not very convenient,
because:

It does not allow to set a custom binding, what can be useful for producing
broken/special outputs for test cases. Adding a new binding would require to
change a syntax (what we observed when added GNUUnique recently).

It does not allow to change the order of the symbols in .symtab/.dynsym,
i.e. currently all Local symbols are placed first, then Global, Weak and GNUUnique
are following, but we are not able to change the order.

It is not consistent. Binding is just one of the properties of the symbol,
we do not group them by other properties.

It makes the code more complex that it can be. This patch shows it can be simplified
with the change performed.

The patch changes the syntax to just:

Symbols:
  Symbol1:
  ...
  Symbol2:
  ...
...

With that, we are able to work with the binding field just like with any other symbol property.

Differential revision: https://reviews.llvm.org/D60122

llvm-svn: 357595
2019-04-03 14:53:42 +00:00

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# RUN: yaml2obj %s > %t
# RUN: llvm-objdump --syms %t > %t1
# RUN: llvm-objdump -t %t > %t2
# RUN: cmp %t1 %t2
# RUN: FileCheck %s --input-file=%t1
# CHECK: SYMBOL TABLE:
# CHECK-NEXT: 0000000000001004 l F .text 00000000 lfoo
# CHECK-NEXT: 0000000000001008 l O .text 00000000 lbar
# CHECK-NEXT: 0000000000001004 g F .text 00000000 foo
# CHECK-NEXT: 0000000000001008 g O .text 00000000 bar
!ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_EXEC
Machine: EM_X86_64
Sections:
- Name: .bss
Type: SHT_NOBITS
Flags: [ SHF_ALLOC ]
AddressAlign: 0x0000000000000010
Size: 64
- Name: .text
Type: SHT_PROGBITS
Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
AddressAlign: 0x0000000000000010
Content: "00000000"
Symbols:
- Name: lfoo
Type: STT_FUNC
Section: .text
Value: 0x1004
- Name: lbar
Type: STT_OBJECT
Section: .text
Value: 0x1008
- Name: foo
Type: STT_FUNC
Section: .text
Value: 0x1004
Binding: STB_GLOBAL
- Name: bar
Type: STT_OBJECT
Section: .text
Value: 0x1008
Binding: STB_GLOBAL