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clang-p2996/lld/test/COFF/sort-debug.test
Martin Storsjö 4c3b74b7f5 [LLD] [COFF] Order .debug_* sections at the end, to avoid leaving gaps if stripped 
So far, we sort all discardable sections at the end, with only some
extra logic to make sure that the .reloc section is at the start
of that group of sections. But if there are other discardable
sections, other than .reloc, they must also be ordered before
.debug_* sections, to avoid leaving gaps if the executable is
stripped.

(Stripping executables doesn't remove all discardable sections,
only the ones named .debug_*).

Rust binaries seem to include a .rmeta section, which is marked
discardable. This fixes stripping such binaries if built with
dwarf debug info included.

This fixes issues observed in MSYS2 in
https://github.com/msys2/MINGW-packages/pull/10555.

Differential Revision: https://reviews.llvm.org/D120805
2022-03-03 10:08:51 +02:00

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# RUN: yaml2obj %s -o %t.obj
# RUN: lld-link /debug /out:%t.exe /entry:main %t.obj
# RUN: llvm-readobj --sections %t.exe | FileCheck %s
# RUN: lld-link /debug:dwarf /out:%t.exe /entry:main %t.obj
# RUN: llvm-readobj --sections %t.exe | FileCheck %s
# RUN: lld-link /out:%t.exe /entry:main %t.obj
# RUN: llvm-readobj --sections %t.exe | FileCheck -check-prefix=NODEBUG %s
# RUN: lld-link /debug:symtab /out:%t.exe /entry:main %t.obj
# RUN: llvm-readobj --sections %t.exe | FileCheck -check-prefix=NODEBUG %s
# CHECK: Name: .text
# CHECK: Name: .reloc
# CHECK: Name: .rmeta
# CHECK: Name: .debug_abbrev
# CHECK: Name: .debug_info
# CHECK: Name: .debug_line
# CHECK: Name: .debug_pubnames
# CHECK: Name: .debug_pubtypes
# NODEBUG: Name: .text
# NODEBUG: Name: .reloc
# NODEBUG: Name: .rmeta
# NODEBUG-NOT: Name: .debug_abbrev
# NODEBUG-NOT: Name: .debug_info
# NODEBUG-NOT: Name: .debug_line
# NODEBUG-NOT: Name: .debug_pubnames
# NODEBUG-NOT: Name: .debug_pubtypes
--- !COFF
header:
Machine: IMAGE_FILE_MACHINE_I386
Characteristics: [ ]
sections:
- Name: .text
Characteristics: [ IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ ]
Alignment: 16
SectionData: 508D0500000000C70424000000005AC3
Relocations:
- VirtualAddress: 3
SymbolName: '?x@@3HA'
Type: IMAGE_REL_I386_DIR32
- Name: .data
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE ]
Alignment: 4
SectionData: ''
- Name: .bss
Characteristics: [ IMAGE_SCN_CNT_UNINITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE ]
Alignment: 4
SectionData: ''
SizeOfRawData: 4
- Name: '.debug$S'
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ ]
Alignment: 1
Subsections:
- !Symbols
Records:
- Kind: S_GPROC32_ID
ProcSym:
PtrParent: 0
PtrEnd: 0
PtrNext: 0
CodeSize: 16
DbgStart: 0
DbgEnd: 0
FunctionType: 0
Segment: 0
Flags: [ ]
DisplayName: main
- Kind: S_PROC_ID_END
ScopeEndSym:
- !Lines
CodeSize: 16
Flags: [ HasColumnInfo ]
RelocOffset: 0
RelocSegment: 0
Blocks:
- FileName: '\usr\local\google\home\majnemer\llvm\src\tools\lld\<stdin>'
Lines:
- Offset: 0
LineStart: 1
IsStatement: false
EndDelta: 0
Columns:
- StartColumn: 0
EndColumn: 0
- !FileChecksums
Checksums:
- FileName: '\usr\local\google\home\majnemer\llvm\src\tools\lld\<stdin>'
Kind: None
Checksum: ''
- !StringTable
Strings:
- '\usr\local\google\home\majnemer\llvm\src\tools\lld\<stdin>'
Relocations:
- VirtualAddress: 44
SymbolName: _main
Type: IMAGE_REL_I386_SECREL
- VirtualAddress: 48
SymbolName: _main
Type: IMAGE_REL_I386_SECTION
- VirtualAddress: 68
SymbolName: _main
Type: IMAGE_REL_I386_SECREL
- VirtualAddress: 72
SymbolName: _main
Type: IMAGE_REL_I386_SECTION
- Name: .debug_str
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ ]
Alignment: 1
SectionData: ''
- Name: .debug_loc
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ ]
Alignment: 1
SectionData: ''
- Name: .debug_abbrev
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ ]
Alignment: 1
SectionData: 011101250E1305030E10171B0E110112060000023400030E49133F193A0B3B0B02186E0E0000032400030E3E0B0B0B0000042E0011011206E77F194018030E3A0B3B0B49133F19000000
- Name: .debug_info
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ ]
Alignment: 1
SectionData: 54000000040000000000040100000000040037000000000000003F000000000000001000000002720000003B0000000101050300000000780000000374000000050404000000001000000001548000000001013B00000000
Relocations:
- VirtualAddress: 6
SymbolName: .debug_abbrev
Type: IMAGE_REL_I386_SECREL
- VirtualAddress: 12
SymbolName: .debug_str
Type: IMAGE_REL_I386_SECREL
- VirtualAddress: 18
SymbolName: .debug_str
Type: IMAGE_REL_I386_SECREL
- VirtualAddress: 22
SymbolName: .debug_line
Type: IMAGE_REL_I386_SECREL
- VirtualAddress: 26
SymbolName: .debug_str
Type: IMAGE_REL_I386_SECREL
- VirtualAddress: 30
SymbolName: .text
Type: IMAGE_REL_I386_DIR32
- VirtualAddress: 39
SymbolName: .debug_str
Type: IMAGE_REL_I386_SECREL
- VirtualAddress: 51
SymbolName: '?x@@3HA'
Type: IMAGE_REL_I386_DIR32
- VirtualAddress: 55
SymbolName: .debug_str
Type: IMAGE_REL_I386_SECREL
- VirtualAddress: 60
SymbolName: .debug_str
Type: IMAGE_REL_I386_SECREL
- VirtualAddress: 67
SymbolName: .text
Type: IMAGE_REL_I386_DIR32
- VirtualAddress: 77
SymbolName: .debug_str
Type: IMAGE_REL_I386_SECREL
- Name: .debug_ranges
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ ]
Alignment: 1
SectionData: ''
- Name: .debug_pubnames
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ ]
Alignment: 1
SectionData: 1D00000002000000000058000000420000006D61696E0026000000780000000000
Relocations:
- VirtualAddress: 6
SymbolName: .debug_info
Type: IMAGE_REL_I386_SECREL
- Name: .debug_pubtypes
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ ]
Alignment: 1
SectionData: 16000000020000000000580000003B000000696E740000000000
Relocations:
- VirtualAddress: 6
SymbolName: .debug_info
Type: IMAGE_REL_I386_SECREL
- Name: .debug_line
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ ]
Alignment: 1
SectionData: 3300000002001E0000000101FB0E0D000101010100000001000001003C737464696E3E000000000000050200000000010AD60202000101
Relocations:
- VirtualAddress: 43
SymbolName: .text
Type: IMAGE_REL_I386_DIR32
- Name: .rmeta
Characteristics: [ IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ ]
Alignment: 1
SectionData: 00112233
symbols:
- Name: .text
Value: 0
SectionNumber: 1
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
SectionDefinition:
Length: 16
NumberOfRelocations: 1
NumberOfLinenumbers: 0
CheckSum: 0
Number: 1
- Name: .data
Value: 0
SectionNumber: 2
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
SectionDefinition:
Length: 0
NumberOfRelocations: 0
NumberOfLinenumbers: 0
CheckSum: 0
Number: 2
- Name: .bss
Value: 0
SectionNumber: 3
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
SectionDefinition:
Length: 4
NumberOfRelocations: 0
NumberOfLinenumbers: 0
CheckSum: 0
Number: 3
- Name: '.debug$S'
Value: 0
SectionNumber: 4
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
SectionDefinition:
Length: 188
NumberOfRelocations: 4
NumberOfLinenumbers: 0
CheckSum: 0
Number: 4
- Name: .debug_str
Value: 0
SectionNumber: 5
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
SectionDefinition:
Length: 133
NumberOfRelocations: 0
NumberOfLinenumbers: 0
CheckSum: 0
Number: 5
- Name: .debug_loc
Value: 0
SectionNumber: 6
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
SectionDefinition:
Length: 0
NumberOfRelocations: 0
NumberOfLinenumbers: 0
CheckSum: 0
Number: 6
- Name: .debug_abbrev
Value: 0
SectionNumber: 7
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
SectionDefinition:
Length: 74
NumberOfRelocations: 0
NumberOfLinenumbers: 0
CheckSum: 0
Number: 7
- Name: .debug_info
Value: 0
SectionNumber: 8
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
SectionDefinition:
Length: 88
NumberOfRelocations: 12
NumberOfLinenumbers: 0
CheckSum: 0
Number: 8
- Name: .debug_ranges
Value: 0
SectionNumber: 9
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
SectionDefinition:
Length: 0
NumberOfRelocations: 0
NumberOfLinenumbers: 0
CheckSum: 0
Number: 9
- Name: .debug_pubnames
Value: 0
SectionNumber: 10
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
SectionDefinition:
Length: 33
NumberOfRelocations: 1
NumberOfLinenumbers: 0
CheckSum: 0
Number: 10
- Name: .debug_pubtypes
Value: 0
SectionNumber: 11
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
SectionDefinition:
Length: 26
NumberOfRelocations: 1
NumberOfLinenumbers: 0
CheckSum: 0
Number: 11
- Name: .debug_line
Value: 0
SectionNumber: 12
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
SectionDefinition:
Length: 55
NumberOfRelocations: 1
NumberOfLinenumbers: 0
CheckSum: 0
Number: 12
- Name: '@feat.00'
Value: 1
SectionNumber: -1
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_STATIC
- Name: _main
Value: 0
SectionNumber: 1
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_FUNCTION
StorageClass: IMAGE_SYM_CLASS_EXTERNAL
- Name: '?x@@3HA'
Value: 0
SectionNumber: 3
SimpleType: IMAGE_SYM_TYPE_NULL
ComplexType: IMAGE_SYM_DTYPE_NULL
StorageClass: IMAGE_SYM_CLASS_EXTERNAL
...
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