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Differential D142425

[BOLT][DWARF] Reuse entries in .debug_addr when not modified
ClosedPublic

Authored by ayermolo on Jan 23 2023, 5:13 PM.

Details

Reviewers
rafauler
Amir
maksfb
jdoerfert
Commits
rGf230099c1327: [BOLT][DWARF] Reuse entries in .debug_addr when not modified
Summary

In some binaries produced with ThinLTO there are CUs that share entry in
.debug_addr. Before we would generate a new entry for each. Which lead to binary
size increase. This changes the behavior so that we re-use entries in
.debug_addr.

Diff Detail

Event Timeline

ayermolo created this revision.Jan 23 2023, 5:13 PM
Herald added a reviewer: rafauler. · View Herald TranscriptJan 23 2023, 5:13 PM
Herald added a reviewer: Amir. · View Herald Transcript
Herald added a reviewer: maksfb. · View Herald Transcript
Herald added a project: Restricted Project. · View Herald Transcript
Herald added subscribers: treapster, hoy, modimo, wenlei. · View Herald Transcript
ayermolo requested review of this revision.Jan 23 2023, 5:13 PM
Herald added a reviewer: jdoerfert. · View Herald TranscriptJan 23 2023, 5:13 PM
Herald added a project: Restricted Project. · View Herald Transcript
Herald added subscribers: llvm-commits, yota9, sstefan1. · View Herald Transcript
Harbormaster completed remote builds in B209513: Diff 491569.Jan 23 2023, 5:27 PM
maksfb accepted this revision.Jan 24 2023, 3:44 PM

LGTM. Thanks!

This revision is now accepted and ready to land.Jan 24 2023, 3:44 PM
ayermolo added a comment.Jan 24 2023, 3:52 PM

Example of pre-bolt debug info

DW_TAG_compile_unit
  DW_AT_addr_base (0x00000008)
DW_TAG_compile_unit
  DW_AT_addr_base (0x00000008)
DW_TAG_compile_unit
  DW_AT_addr_base (0x00000008)

If only the first CU was modified, and other two were not.
Before the fix:

DW_TAG_compile_unit
  DW_AT_addr_base (0x00000008)
DW_TAG_compile_unit
  DW_AT_addr_base (0x00000020)
DW_TAG_compile_unit
  DW_AT_addr_base (0x00000030)

After the fix:

DW_TAG_compile_unit
  DW_AT_addr_base (0x00000008)
DW_TAG_compile_unit
  DW_AT_addr_base (0x00000020)
DW_TAG_compile_unit
  DW_AT_addr_base (0x00000020)
Closed by commit rGf230099c1327: [BOLT][DWARF] Reuse entries in .debug_addr when not modified (authored by ayermolo). · Explain WhyJan 24 2023, 3:56 PM
This revision was automatically updated to reflect the committed changes.
ayermolo added a commit: rGf230099c1327: [BOLT][DWARF] Reuse entries in .debug_addr when not modified.

Revision Contents

Diff 491946

bolt/lib/Core/DebugData.cpp

Show First 20 Lines • Show All 474 Lines • ▼ Show 20 LinesAddressSectionBuffer DebugAddrWriterDwarf5::finalize() {
raw_svector_ostream AddressStream(Buffer); raw_svector_ostream AddressStream(Buffer);
const endianness Endian = const endianness Endian =
BC->DwCtx->isLittleEndian() ? support::little : support::big; BC->DwCtx->isLittleEndian() ? support::little : support::big;
const DWARFSection &AddrSec = BC->DwCtx->getDWARFObj().getAddrSection(); const DWARFSection &AddrSec = BC->DwCtx->getDWARFObj().getAddrSection();
DWARFDataExtractor AddrData(BC->DwCtx->getDWARFObj(), AddrSec, Endian, 0); DWARFDataExtractor AddrData(BC->DwCtx->getDWARFObj(), AddrSec, Endian, 0);
DWARFDebugAddrTable AddrTable; DWARFDebugAddrTable AddrTable;
DIDumpOptions DumpOpts; DIDumpOptions DumpOpts;
constexpr uint32_t HeaderSize = 8; constexpr uint32_t HeaderSize = 8;
DenseMap<uint64_t, uint64_t> UnmodifiedAddressOffsets;
for (std::unique_ptr<DWARFUnit> &CU : BC->DwCtx->compile_units()) { for (std::unique_ptr<DWARFUnit> &CU : BC->DwCtx->compile_units()) {
const uint64_t CUID = getCUID(*CU.get()); const uint64_t CUID = getCUID(*CU.get());
const uint8_t AddrSize = CU->getAddressByteSize(); const uint8_t AddrSize = CU->getAddressByteSize();
auto AMIter = AddressMaps.find(CUID); auto AMIter = AddressMaps.find(CUID);
// A case where CU has entry in .debug_addr, but we don't modify addresses // A case where CU has entry in .debug_addr, but we don't modify addresses
// for it. // for it.
if (AMIter == AddressMaps.end()) { if (AMIter == AddressMaps.end()) {
AMIter = AddressMaps.insert({CUID, AddressForDWOCU()}).first; AMIter = AddressMaps.insert({CUID, AddressForDWOCU()}).first;
std::optional<uint64_t> BaseOffset = CU->getAddrOffsetSectionBase(); std::optional<uint64_t> BaseOffset = CU->getAddrOffsetSectionBase();
if (!BaseOffset) if (!BaseOffset)
continue; continue;
// Address base offset is to the first entry. // Address base offset is to the first entry.
// The size of header is 8 bytes. // The size of header is 8 bytes.
uint64_t Offset = *BaseOffset - HeaderSize; uint64_t Offset = *BaseOffset - HeaderSize;
auto Iter = UnmodifiedAddressOffsets.find(Offset);
if (Iter != UnmodifiedAddressOffsets.end()) {
DWOIdToOffsetMap[CUID] = Iter->getSecond();
continue;
}
UnmodifiedAddressOffsets[Offset] = Buffer.size() + HeaderSize;
if (Error Err = AddrTable.extract(AddrData, &Offset, 5, AddrSize, if (Error Err = AddrTable.extract(AddrData, &Offset, 5, AddrSize,
DumpOpts.WarningHandler)) { DumpOpts.WarningHandler)) {
DumpOpts.RecoverableErrorHandler(std::move(Err)); DumpOpts.RecoverableErrorHandler(std::move(Err));
continue; continue;
} }
uint32_t Index = 0; uint32_t Index = 0;
for (uint64_t Addr : AddrTable.getAddressEntries()) for (uint64_t Addr : AddrTable.getAddressEntries())
AMIter->second.insert(Addr, Index++); AMIter->second.insert(Addr, Index++);
} }
DWOIdToOffsetMap[CUID] = Buffer.size() + HeaderSize; DWOIdToOffsetMap[CUID] = Buffer.size() + HeaderSize;
std::vector<IndexAddressPair> SortedMap( std::vector<IndexAddressPair> SortedMap(
▲ Show 20 Lines • Show All 1,215 Lines • Show Last 20 Lines

bolt/test/X86/Inputs/dwarf5-helper1-addr-section-reuse.s

  • This file was added.
# int foo() {
# return 0;
#}
.text
.file "helper1.cpp"
.globl _Z3foov # -- Begin function _Z3foov
.p2align 4, 0x90
.type _Z3foov,@function
_Z3foov: # @_Z3foov
.Lfunc_begin0:
.file 0 "testAddr" "helper1.cpp" md5 0xd7d0e6ab5d3b7dbefa5b3fd3cd035697
.loc 0 1 0 # helper1.cpp:1:0
.cfi_startproc
# %bb.0:
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset %rbp, -16
movq %rsp, %rbp
.cfi_def_cfa_register %rbp
.Ltmp0:
.loc 0 2 3 prologue_end # helper1.cpp:2:3
xorl %eax, %eax
.loc 0 2 3 epilogue_begin is_stmt 0 # helper1.cpp:2:3
popq %rbp
.cfi_def_cfa %rsp, 8
retq
.Ltmp1:
.Lfunc_end0:
.size _Z3foov, .Lfunc_end0-_Z3foov
.cfi_endproc
# -- End function
.section .debug_abbrev,"",@progbits
.byte 1 # Abbreviation Code
.byte 17 # DW_TAG_compile_unit
.byte 1 # DW_CHILDREN_yes
.byte 37 # DW_AT_producer
.byte 37 # DW_FORM_strx1
.byte 19 # DW_AT_language
.byte 5 # DW_FORM_data2
.byte 3 # DW_AT_name
.byte 37 # DW_FORM_strx1
.byte 114 # DW_AT_str_offsets_base
.byte 23 # DW_FORM_sec_offset
.byte 16 # DW_AT_stmt_list
.byte 23 # DW_FORM_sec_offset
.byte 27 # DW_AT_comp_dir
.byte 37 # DW_FORM_strx1
.byte 115 # DW_AT_addr_base
.byte 23 # DW_FORM_sec_offset
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 2 # Abbreviation Code
.byte 46 # DW_TAG_subprogram
.byte 0 # DW_CHILDREN_no
.byte 64 # DW_AT_frame_base
.byte 24 # DW_FORM_exprloc
.byte 110 # DW_AT_linkage_name
.byte 37 # DW_FORM_strx1
.byte 3 # DW_AT_name
.byte 37 # DW_FORM_strx1
.byte 58 # DW_AT_decl_file
.byte 11 # DW_FORM_data1
.byte 59 # DW_AT_decl_line
.byte 11 # DW_FORM_data1
.byte 73 # DW_AT_type
.byte 19 # DW_FORM_ref4
.byte 63 # DW_AT_external
.byte 25 # DW_FORM_flag_present
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 3 # Abbreviation Code
.byte 36 # DW_TAG_base_type
.byte 0 # DW_CHILDREN_no
.byte 3 # DW_AT_name
.byte 37 # DW_FORM_strx1
.byte 62 # DW_AT_encoding
.byte 11 # DW_FORM_data1
.byte 11 # DW_AT_byte_size
.byte 11 # DW_FORM_data1
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 0 # EOM(3)
.section .debug_info,"",@progbits
.Lcu_begin0:
.long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
.Ldebug_info_start0:
.short 5 # DWARF version number
.byte 1 # DWARF Unit Type
.byte 8 # Address Size (in bytes)
.long .debug_abbrev # Offset Into Abbrev. Section
.byte 1 # Abbrev [1] 0xc:0x2c DW_TAG_compile_unit
.byte 0 # DW_AT_producer
.short 33 # DW_AT_language
.byte 1 # DW_AT_name
.long .Lstr_offsets_base0 # DW_AT_str_offsets_base
.long .Lline_table_start0 # DW_AT_stmt_list
.byte 2 # DW_AT_comp_dir
.long 0x8 # DW_AT_addr_base
.byte 2 # Abbrev [2] 0x23:0x10 DW_TAG_subprogram
.byte 1 # DW_AT_frame_base
.byte 86
.byte 3 # DW_AT_linkage_name
.byte 4 # DW_AT_name
.byte 0 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line
.long 51 # DW_AT_type
# DW_AT_external
.byte 3 # Abbrev [3] 0x33:0x4 DW_TAG_base_type
.byte 5 # DW_AT_name
.byte 5 # DW_AT_encoding
.byte 4 # DW_AT_byte_size
.byte 0 # End Of Children Mark
.Ldebug_info_end0:
.section .debug_str_offsets,"",@progbits
.long 28 # Length of String Offsets Set
.short 5
.short 0
.Lstr_offsets_base0:
.section .debug_str,"MS",@progbits,1
.Linfo_string0:
.asciz "clang version 15.0.0" # string offset=0
.Linfo_string1:
.asciz "helper1.cpp" # string offset=146
.Linfo_string2:
.asciz "testAddr" # string offset=158
.Linfo_string3:
.asciz "_Z3foov" # string offset=205
.Linfo_string4:
.asciz "foo" # string offset=213
.Linfo_string5:
.asciz "int" # string offset=217
.section .debug_str_offsets,"",@progbits
.long .Linfo_string0
.long .Linfo_string1
.long .Linfo_string2
.long .Linfo_string3
.long .Linfo_string4
.long .Linfo_string5
.ident "clang version 15.0.0"
.section ".note.GNU-stack","",@progbits
.addrsig
.section .debug_line,"",@progbits
.Lline_table_start0:

bolt/test/X86/Inputs/dwarf5-helper2-addr-section-reuse.s

  • This file was added.
# int foo() {
# return 0;
#}
.text
.file "helper2.cpp"
.globl _Z4foo2v # -- Begin function _Z4foo2v
.p2align 4, 0x90
.type _Z4foo2v,@function
_Z4foo2v: # @_Z4foo2v
.Lfunc_begin0:
.file 0 "testAddr" "helper2.cpp" md5 0xd625613508584d1558af439616b0e2d3
.loc 0 1 0 # helper2.cpp:1:0
.cfi_startproc
# %bb.0:
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset %rbp, -16
movq %rsp, %rbp
.cfi_def_cfa_register %rbp
.Ltmp0:
.loc 0 2 3 prologue_end # helper2.cpp:2:3
xorl %eax, %eax
.loc 0 2 3 epilogue_begin is_stmt 0 # helper2.cpp:2:3
popq %rbp
.cfi_def_cfa %rsp, 8
retq
.Ltmp1:
.Lfunc_end0:
.size _Z4foo2v, .Lfunc_end0-_Z4foo2v
.cfi_endproc
# -- End function
.section .debug_abbrev,"",@progbits
.byte 1 # Abbreviation Code
.byte 17 # DW_TAG_compile_unit
.byte 1 # DW_CHILDREN_yes
.byte 37 # DW_AT_producer
.byte 37 # DW_FORM_strx1
.byte 19 # DW_AT_language
.byte 5 # DW_FORM_data2
.byte 3 # DW_AT_name
.byte 37 # DW_FORM_strx1
.byte 114 # DW_AT_str_offsets_base
.byte 23 # DW_FORM_sec_offset
.byte 16 # DW_AT_stmt_list
.byte 23 # DW_FORM_sec_offset
.byte 27 # DW_AT_comp_dir
.byte 37 # DW_FORM_strx1
.byte 115 # DW_AT_addr_base
.byte 23 # DW_FORM_sec_offset
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 2 # Abbreviation Code
.byte 46 # DW_TAG_subprogram
.byte 0 # DW_CHILDREN_no
.byte 64 # DW_AT_frame_base
.byte 24 # DW_FORM_exprloc
.byte 110 # DW_AT_linkage_name
.byte 37 # DW_FORM_strx1
.byte 3 # DW_AT_name
.byte 37 # DW_FORM_strx1
.byte 58 # DW_AT_decl_file
.byte 11 # DW_FORM_data1
.byte 59 # DW_AT_decl_line
.byte 11 # DW_FORM_data1
.byte 73 # DW_AT_type
.byte 19 # DW_FORM_ref4
.byte 63 # DW_AT_external
.byte 25 # DW_FORM_flag_present
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 3 # Abbreviation Code
.byte 36 # DW_TAG_base_type
.byte 0 # DW_CHILDREN_no
.byte 3 # DW_AT_name
.byte 37 # DW_FORM_strx1
.byte 62 # DW_AT_encoding
.byte 11 # DW_FORM_data1
.byte 11 # DW_AT_byte_size
.byte 11 # DW_FORM_data1
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 0 # EOM(3)
.section .debug_info,"",@progbits
.Lcu_begin0:
.long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
.Ldebug_info_start0:
.short 5 # DWARF version number
.byte 1 # DWARF Unit Type
.byte 8 # Address Size (in bytes)
.long .debug_abbrev # Offset Into Abbrev. Section
.byte 1 # Abbrev [1] 0xc:0x2c DW_TAG_compile_unit
.byte 0 # DW_AT_producer
.short 33 # DW_AT_language
.byte 1 # DW_AT_name
.long .Lstr_offsets_base0 # DW_AT_str_offsets_base
.long .Lline_table_start0 # DW_AT_stmt_list
.byte 2 # DW_AT_comp_dir
.long 0x8 # DW_AT_addr_base
.byte 2 # Abbrev [2] 0x23:0x10 DW_TAG_subprogram
.byte 1 # DW_AT_frame_base
.byte 86
.byte 3 # DW_AT_linkage_name
.byte 4 # DW_AT_name
.byte 0 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line
.long 51 # DW_AT_type
# DW_AT_external
.byte 3 # Abbrev [3] 0x33:0x4 DW_TAG_base_type
.byte 5 # DW_AT_name
.byte 5 # DW_AT_encoding
.byte 4 # DW_AT_byte_size
.byte 0 # End Of Children Mark
.Ldebug_info_end0:
.section .debug_str_offsets,"",@progbits
.long 28 # Length of String Offsets Set
.short 5
.short 0
.Lstr_offsets_base0:
.section .debug_str,"MS",@progbits,1
.Linfo_string0:
.asciz "clang version 15.0.0" # string offset=0
.Linfo_string1:
.asciz "helper2.cpp" # string offset=146
.Linfo_string2:
.asciz "testAddr" # string offset=158
.Linfo_string3:
.asciz "_Z4foo2v" # string offset=205
.Linfo_string4:
.asciz "foo2" # string offset=214
.Linfo_string5:
.asciz "int" # string offset=219
.section .debug_str_offsets,"",@progbits
.long .Linfo_string0
.long .Linfo_string1
.long .Linfo_string2
.long .Linfo_string3
.long .Linfo_string4
.long .Linfo_string5
.ident "clang version 15.0.0"
.section ".note.GNU-stack","",@progbits
.addrsig
.section .debug_line,"",@progbits
.Lline_table_start0:

bolt/test/X86/Inputs/dwarf5-main-addr-section-reuse.s

  • This file was added.
#int main() {
# return 0;
#}
.text
.file "main.cpp"
.globl main # -- Begin function main
.p2align 4, 0x90
.type main,@function
main: # @main
.Lfunc_begin0:
.file 0 "testAddr" "main.cpp" md5 0xd7b10b0a4a7fb8e0790feb7a5cd9b69a
.loc 0 1 0 # main.cpp:1:0
.cfi_startproc
# %bb.0:
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset %rbp, -16
movq %rsp, %rbp
.cfi_def_cfa_register %rbp
movl $0, -4(%rbp)
.Ltmp0:
.loc 0 2 3 prologue_end # main.cpp:2:3
xorl %eax, %eax
.loc 0 2 3 epilogue_begin is_stmt 0 # main.cpp:2:3
popq %rbp
.cfi_def_cfa %rsp, 8
retq
.Ltmp1:
.Lfunc_end0:
.size main, .Lfunc_end0-main
.cfi_endproc
# -- End function
.section .debug_abbrev,"",@progbits
.byte 1 # Abbreviation Code
.byte 17 # DW_TAG_compile_unit
.byte 1 # DW_CHILDREN_yes
.byte 37 # DW_AT_producer
.byte 37 # DW_FORM_strx1
.byte 19 # DW_AT_language
.byte 5 # DW_FORM_data2
.byte 3 # DW_AT_name
.byte 37 # DW_FORM_strx1
.byte 114 # DW_AT_str_offsets_base
.byte 23 # DW_FORM_sec_offset
.byte 16 # DW_AT_stmt_list
.byte 23 # DW_FORM_sec_offset
.byte 27 # DW_AT_comp_dir
.byte 37 # DW_FORM_strx1
.byte 17 # DW_AT_low_pc
.byte 27 # DW_FORM_addrx
.byte 18 # DW_AT_high_pc
.byte 6 # DW_FORM_data4
.byte 115 # DW_AT_addr_base
.byte 23 # DW_FORM_sec_offset
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 2 # Abbreviation Code
.byte 46 # DW_TAG_subprogram
.byte 0 # DW_CHILDREN_no
.byte 17 # DW_AT_low_pc
.byte 27 # DW_FORM_addrx
.byte 18 # DW_AT_high_pc
.byte 6 # DW_FORM_data4
.byte 64 # DW_AT_frame_base
.byte 24 # DW_FORM_exprloc
.byte 3 # DW_AT_name
.byte 37 # DW_FORM_strx1
.byte 58 # DW_AT_decl_file
.byte 11 # DW_FORM_data1
.byte 59 # DW_AT_decl_line
.byte 11 # DW_FORM_data1
.byte 73 # DW_AT_type
.byte 19 # DW_FORM_ref4
.byte 63 # DW_AT_external
.byte 25 # DW_FORM_flag_present
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 3 # Abbreviation Code
.byte 36 # DW_TAG_base_type
.byte 0 # DW_CHILDREN_no
.byte 3 # DW_AT_name
.byte 37 # DW_FORM_strx1
.byte 62 # DW_AT_encoding
.byte 11 # DW_FORM_data1
.byte 11 # DW_AT_byte_size
.byte 11 # DW_FORM_data1
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 0 # EOM(3)
.section .debug_info,"",@progbits
.Lcu_begin0:
.long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
.Ldebug_info_start0:
.short 5 # DWARF version number
.byte 1 # DWARF Unit Type
.byte 8 # Address Size (in bytes)
.long .debug_abbrev # Offset Into Abbrev. Section
.byte 1 # Abbrev [1] 0xc:0x2b DW_TAG_compile_unit
.byte 0 # DW_AT_producer
.short 33 # DW_AT_language
.byte 1 # DW_AT_name
.long .Lstr_offsets_base0 # DW_AT_str_offsets_base
.long .Lline_table_start0 # DW_AT_stmt_list
.byte 2 # DW_AT_comp_dir
.byte 0 # DW_AT_low_pc
.long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
.long .Laddr_table_base0 # DW_AT_addr_base
.byte 2 # Abbrev [2] 0x23:0xf DW_TAG_subprogram
.byte 0 # DW_AT_low_pc
.long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
.byte 1 # DW_AT_frame_base
.byte 86
.byte 3 # DW_AT_name
.byte 0 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line
.long 50 # DW_AT_type
# DW_AT_external
.byte 3 # Abbrev [3] 0x32:0x4 DW_TAG_base_type
.byte 4 # DW_AT_name
.byte 5 # DW_AT_encoding
.byte 4 # DW_AT_byte_size
.byte 0 # End Of Children Mark
.Ldebug_info_end0:
.section .debug_str_offsets,"",@progbits
.long 24 # Length of String Offsets Set
.short 5
.short 0
.Lstr_offsets_base0:
.section .debug_str,"MS",@progbits,1
.Linfo_string0:
.asciz "clang version 15.0.0" # string offset=0
.Linfo_string1:
.asciz "main.cpp" # string offset=146
.Linfo_string2:
.asciz "testAddr" # string offset=155
.Linfo_string3:
.asciz "main" # string offset=202
.Linfo_string4:
.asciz "int" # string offset=207
.section .debug_str_offsets,"",@progbits
.long .Linfo_string0
.long .Linfo_string1
.long .Linfo_string2
.long .Linfo_string3
.long .Linfo_string4
.section .debug_addr,"",@progbits
.long .Ldebug_addr_end0-.Ldebug_addr_start0 # Length of contribution
.Ldebug_addr_start0:
.short 5 # DWARF version number
.byte 8 # Address size
.byte 0 # Segment selector size
.Laddr_table_base0:
.quad .Lfunc_begin0
.Ldebug_addr_end0:
.ident "clang version 15.0.0"
.section ".note.GNU-stack","",@progbits
.addrsig
.section .debug_line,"",@progbits
.Lline_table_start0:

bolt/test/X86/dwarf5-addr-section-reuse.s

  • This file was added.
# RUN: llvm-mc -dwarf-version=5 -filetype=obj -triple x86_64-unknown-linux %p/Inputs/dwarf5-main-addr-section-reuse.s -o %tmain.o
# RUN: llvm-mc -dwarf-version=5 -filetype=obj -triple x86_64-unknown-linux %p/Inputs/dwarf5-helper1-addr-section-reuse.s -o %thelper1.o
# RUN: llvm-mc -dwarf-version=5 -filetype=obj -triple x86_64-unknown-linux %p/Inputs/dwarf5-helper2-addr-section-reuse.s -o %thelper2.o
# RUN: %clang %cflags -dwarf-5 %tmain.o %thelper1.o %thelper2.o -o %t.exe -Wl,-q
# RUN: llvm-dwarfdump --debug-info %t.exe | FileCheck --check-prefix=PRECHECK %s
# RUN: llvm-bolt %t.exe -o %t.exe.bolt --update-debug-sections
# RUN: llvm-dwarfdump --debug-info %t.exe.bolt | FileCheck --check-prefix=POSTCHECK %s
# This test checks that when a binary is bolted if CU is not modified and has DW_AT_addr_base that is shared
# after being bolted CUs still share same entry in .debug_addr.
# PRECHECK: DW_AT_addr_base (0x00000008)
# PRECHECK: DW_AT_addr_base (0x00000008)
# PRECHECK: DW_AT_addr_base (0x00000008)
# POSTCHECK: DW_AT_addr_base (0x00000008)
# POSTCHECK: DW_AT_addr_base (0x00000020)
# POSTCHECK: DW_AT_addr_base (0x00000020)