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llvm-project/llvm/test/tools/llvm-readobj/demangle.test
George Rimar 6da44ad75d [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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## Show that llvm-readelf + llvm-readobj demangle symbol names in symbol tables
## (including dynamic symbols), relocations (including dynamic relocations), and groups.
# RUN: yaml2obj %s > %t.so
## Check LLVM output style.
# RUN: llvm-readobj --symbols --relocations --dyn-symbols --dyn-relocations \
# RUN: --elf-section-groups --elf-cg-profile --addrsig \
# RUN: --demangle %t.so > %t.llvm.long
# RUN: llvm-readobj --symbols --relocations --dyn-symbols --dyn-relocations \
# RUN: --elf-section-groups --elf-cg-profile --addrsig \
# RUN: -C %t.so > %t.llvm.short
# RUN: FileCheck %s --input-file %t.llvm.long --check-prefixes=LLVM-COMMON,LLVM-DEMANGLE
# RUN: diff %t.llvm.long %t.llvm.short
## Check that default is no demangling.
# RUN: llvm-readobj --symbols --relocations --dyn-symbols --dyn-relocations \
# RUN: --elf-section-groups --elf-cg-profile --addrsig \
# RUN: %t.so > %t.llvm.default
# RUN: llvm-readobj --symbols --relocations --dyn-symbols --dyn-relocations \
# RUN: --elf-section-groups --elf-cg-profile --addrsig \
# RUN: --demangle=false %t.so > %t.llvm.nodemangle
# RUN: FileCheck %s --input-file %t.llvm.default --check-prefixes=LLVM-COMMON,LLVM-MANGLED
# RUN: diff %t.llvm.default %t.llvm.nodemangle
# LLVM-COMMON: Relocations [
# LLVM-COMMON: Section {{.*}} .rela.text.foo {
# LLVM-DEMANGLE-NEXT: {{ }}foo(char){{ }}
# LLVM-MANGLED-NEXT: {{ }}_Z3fooc{{ }}
# LLVM-COMMON-NEXT: }
# LLVM-COMMON: ]
# LLVM-COMMON: Dynamic Relocations {
# LLVM-DEMANGLE-NEXT: {{ }}foo(int){{ }}
# LLVM-MANGLED-NEXT: {{ }}_Z3fooi{{ }}
# LLVM-COMMON-NEXT: }
# LLVM-COMMON: Symbols [
# LLVM-DEMANGLE: Name: foo(char){{ }}
# LLVM-DEMANGLE: Name: blah(float){{ }}
# LLVM-MANGLED: Name: _Z3fooc{{ }}
# LLVM-MANGLED: Name: _Z4blahf{{ }}
# LLVM-COMMON: ]
# LLVM-COMMON: DynamicSymbols [
# LLVM-DEMANGLE: Name: foo(int){{ }}
# LLVM-MANGLED: Name: _Z3fooi{{ }}
# LLVM-COMMON: ]
# LLVM-COMMON: Groups {
# LLVM-DEMANGLE: Signature: foo(char){{$}}
# LLVM-MANGLED: Signature: _Z3fooc{{$}}
# LLVM-COMMON: }
# LLVM-COMMON: CGProfile [
# LLVM-DEMANGLE: From: foo(char){{ }}
# LLVM-DEMANGLE: To: blah(float){{ }}
# LLVM-MANGLED: From: _Z3fooc{{ }}
# LLVM-MANGLED: To: _Z4blahf{{ }}
# LLVM-COMMON: ]
# LLVM-COMMON: Addrsig [
# LLVM-DEMANGLE-NEXT: Sym: foo(char){{ }}
# LLVM-DEMANGLE-NEXT: Sym: blah(float){{ }}
# LLVM-MANGLED-NEXT: Sym: _Z3fooc{{ }}
# LLVM-MANGLED-NEXT: Sym: _Z4blahf{{ }}
# LLVM-COMMON-NEXT: ]
## Check GNU output style.
# RUN: llvm-readelf --symbols --relocations --dyn-symbols --dyn-relocations \
# RUN: --elf-section-groups --demangle %t.so > %t.gnu.long
# RUN: llvm-readelf --symbols --relocations --dyn-symbols --dyn-relocations \
# RUN: --elf-section-groups -C %t.so > %t.gnu.short
# RUN: FileCheck %s --input-file %t.gnu.long --check-prefixes=GNU-COMMON,GNU-DEMANGLE
# RUN: diff %t.gnu.long %t.gnu.short
## Check that default is no demangling.
# RUN: llvm-readelf --symbols --relocations --dyn-symbols --dyn-relocations \
# RUN: --elf-section-groups %t.so > %t.gnu.default
# RUN: llvm-readelf --symbols --relocations --dyn-symbols --dyn-relocations \
# RUN: --elf-section-groups --demangle=false %t.so > %t.gnu.nodemangle
# RUN: FileCheck %s --input-file %t.gnu.default --check-prefixes=GNU-COMMON,GNU-MANGLED
# RUN: diff %t.gnu.default %t.gnu.nodemangle
# GNU-COMMON: Relocation section '.rela.text.foo' at offset {{.*}} contains 1 entries:
# GNU-COMMON-NEXT: Offset Info Type Symbol's Value Symbol's Name + Addend
# GNU-DEMANGLE-NEXT: foo(char){{ }}
# GNU-MANGLED-NEXT: _Z3fooc{{ }}
# GNU-COMMON: 'RELA' relocation section at offset {{.*}} contains 24 bytes:
# GNU-COMMON-NEXT: Offset Info Type Symbol's Value Symbol's Name + Addend
# GNU-DEMANGLE-NEXT: foo(int){{ }}
# GNU-MANGLED-NEXT: _Z3fooi{{ }}
# GNU-COMMON: Symbol table '.dynsym' contains 2 entries:
# GNU-COMMON-NEXT: Num: Value Size Type Bind Vis Ndx Name
# GNU-COMMON-NEXT: 0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
# GNU-DEMANGLE-NEXT: foo(int){{$}}
# GNU-MANGLED-NEXT: _Z3fooi{{$}}
# GNU-COMMON: Symbol table '.symtab' contains 3 entries:
# GNU-COMMON-NEXT: Num: Value Size Type Bind Vis Ndx Name
# GNU-COMMON-NEXT: 0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND
# GNU-DEMANGLE-NEXT: foo(char){{$}}
# GNU-DEMANGLE-NEXT: blah(float){{$}}
# GNU-MANGLED-NEXT: _Z3fooc{{$}}
# GNU-MANGLED-NEXT: _Z4blahf{{$}}
# GNU-COMMON: COMDAT group section [{{.*}}] `.group'
# GNU-DEMANGLE-SAME: [foo(char)]
# GNU-MANGLED-SAME: [_Z3fooc]
!ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_DYN
Machine: EM_X86_64
Sections:
## TODO: Replace the raw section contents with more meaningful dynamic
## tags/symbols/etc, once yaml2obj supports it.
## FIXME: yaml2obj does not currently allow custom addresses for .dynstr and
## .dynsym if DynamicSymbols are specified.
## See https://bugs.llvm.org/show_bug.cgi?id=40339
- Name: .dynstr
Type: SHT_STRTAB
Flags: [ SHF_ALLOC ]
AddressAlign: 0x100
EntSize: 0x1
## "\0_Z3fooi\0"
Content: "005f5a33666f6f6900"
- Name: .dynsym
Type: SHT_DYNSYM
Flags: [ SHF_ALLOC ]
Link: .dynstr
Address: 0x100
AddressAlign: 0x100
EntSize: 0x18
## Null symbol;
## st_name: 1; st_info: Global | Func; st_other: 0;
## st_shndx: .text.foo; st_value: 0x2000; st_size: 0
Content: "000000000000000000000000000000000000000000000000010000001200050000200000000000000000000000000000"
- Name: .rela.dyn
Type: SHT_RELA
Flags: [ SHF_ALLOC ]
Link: .dynsym
Info: .text.foo
Address: 0x200
AddressAlign: 0x100
EntSize: 0x18
Relocations:
- Offset: 0x10
## FIXME: This should be a lookup in the corresponding symbol table, not necessarily the static symbol table.
## See https://bugs.llvm.org/show_bug.cgi?id=40337.
Symbol: _Z3fooc
Type: R_X86_64_PC32
Addend: 0x4
- Name: .dynamic
Type: SHT_DYNAMIC
Flags: [ SHF_ALLOC ]
Address: 0x0000000000001000
Link: .dynstr
AddressAlign: 0x0000000000001000
EntSize: 0x0000000000000010
Entries:
- Tag: DT_STRTAB
Value: 0x0000000000000000
- Tag: DT_STRSZ
Value: 0x0000000000000009
- Tag: DT_SYMTAB
Value: 0x0000000000000100
- Tag: DT_SYMENT
Value: 0x0000000000000018
- Tag: DT_RELA
Value: 0x0000000000000200
- Tag: DT_RELASZ
Value: 0x0000000000000018
- Tag: DT_RELAENT
Value: 0x0000000000000018
- Tag: DT_NULL
Value: 0x0000000000000000
- Name: .text.foo
Type: SHT_PROGBITS
Flags: [ SHF_ALLOC, SHF_EXECINSTR, SHF_GROUP ]
Size: 0x40
Address: 0x2000
AddressAlign: 0x2000
- Name: .group
Type: SHT_GROUP
Link: .symtab
Info: _Z3fooc
Members:
- SectionOrType: GRP_COMDAT
- SectionOrType: .text.foo
- Name: .rela.text.foo
Type: SHT_RELA
Link: .symtab
Info: .text.foo
Relocations:
- Offset: 0x10
Symbol: _Z3fooc
Type: R_X86_64_PC32
- Name: .llvm.call-graph-profile
Type: SHT_LLVM_CALL_GRAPH_PROFILE
Link: .symtab
EntSize: 16
Content: "01000000020000002000000000000000"
- Name: .llvm_addrsig
Type: SHT_LLVM_ADDRSIG
Link: .symtab
Content: "0102"
Symbols:
- Name: _Z3fooc
Type: STT_FUNC
Section: .text.foo
Binding: STB_GLOBAL
- Name: _Z4blahf
Type: STT_FUNC
Section: .text.foo
Binding: STB_GLOBAL
ProgramHeaders:
- Type: PT_LOAD
Flags: [ PF_R, PF_X ]
VAddr: 0x0
PAddr: 0x0
Sections:
- Section: .dynsym
- Section: .dynstr
- Section: .rela.dyn
- Section: .dynamic
- Section: .text.foo
- Type: PT_DYNAMIC
Flags: [ PF_R ]
VAddr: 0x1000
PAddr: 0x1000
Sections:
- Section: .dynamic
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