This is an archive of the discontinued LLVM Phabricator instance.

Differential D130812

[BOLT][DWARF] Fix handling of multiple DW_OP_addrx in an expression
ClosedPublic

Authored by ayermolo on Jul 29 2022, 6:15 PM.

Details

Reviewers
rafauler
Amir
maksfb
jdoerfert
Commits
rGdd29b3c54201: [BOLT][DWARF] Fix handling of multiple DW_OP_addrx in an expression
Summary

We were not handling correclty multiple DW_OP_addrx in the location expression.
This was exposed by clang-15 build in release mode with debug information.

Diff Detail

Event Timeline

ayermolo created this revision.Jul 29 2022, 6:15 PM
Herald added a reviewer: rafauler. · View Herald TranscriptJul 29 2022, 6:15 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: hoy, modimo, wenlei. · View Herald Transcript
ayermolo requested review of this revision.Jul 29 2022, 6:15 PM
Herald added a reviewer: jdoerfert. · View Herald TranscriptJul 29 2022, 6:15 PM
Herald added a project: Restricted Project. · View Herald Transcript
Herald added subscribers: llvm-commits, yota9, sstefan1. · View Herald Transcript
ayermolo updated this revision to Diff 448755.Jul 29 2022, 6:17 PM

nit

ayermolo added a subscriber: dblaikie.Jul 29 2022, 6:18 PM

Thanks to @dblaikie for the unit test. :)

Harbormaster completed remote builds in B178372: Diff 448755.Jul 29 2022, 6:24 PM
maksfb added inline comments.Jul 29 2022, 6:38 PM
bolt/lib/Rewrite/DWARFRewriter.cpp
668
670

Do you have to update when SizeDiff == 0?

ayermolo added inline comments.Jul 29 2022, 7:59 PM
bolt/lib/Rewrite/DWARFRewriter.cpp
670

ah good point!

ayermolo updated this revision to Diff 448766.Jul 29 2022, 8:02 PM

remove update bool

ayermolo updated this revision to Diff 448767.Jul 29 2022, 8:03 PM
ayermolo marked an inline comment as done.

comment

ayermolo marked an inline comment as done.Jul 29 2022, 8:03 PM
Harbormaster completed remote builds in B178379: Diff 448767.Jul 29 2022, 8:09 PM
maksfb accepted this revision.Jul 29 2022, 8:30 PM

LGTM

This revision is now accepted and ready to land.Jul 29 2022, 8:30 PM
Closed by commit rGdd29b3c54201: [BOLT][DWARF] Fix handling of multiple DW_OP_addrx in an expression (authored by ayermolo). · Explain WhyAug 1 2022, 2:42 PM
This revision was automatically updated to reflect the committed changes.
ayermolo added a commit: rGdd29b3c54201: [BOLT][DWARF] Fix handling of multiple DW_OP_addrx in an expression.

Revision Contents

PathSize
bolt/
lib/
Rewrite/
31 lines
test/
X86/
445 lines

Diff 448766

bolt/lib/Rewrite/DWARFRewriter.cpp

Show First 20 Lines • Show All 622 Lines • ▼ Show 20 Lines default: {
"unexpected DW_AT_location form"); "unexpected DW_AT_location form");
if (Unit.isDWOUnit() || Unit.getVersion() >= 5) { if (Unit.isDWOUnit() || Unit.getVersion() >= 5) {
ArrayRef<uint8_t> Expr = *Value.getAsBlock(); ArrayRef<uint8_t> Expr = *Value.getAsBlock();
DataExtractor Data( DataExtractor Data(
StringRef((const char *)Expr.data(), Expr.size()), StringRef((const char *)Expr.data(), Expr.size()),
Unit.getContext().isLittleEndian(), 0); Unit.getContext().isLittleEndian(), 0);
DWARFExpression LocExpr(Data, Unit.getAddressByteSize(), DWARFExpression LocExpr(Data, Unit.getAddressByteSize(),
Unit.getFormParams().Format); Unit.getFormParams().Format);
uint32_t PrevOffset = 0; uint32_t PrevEndOffset = 0;
constexpr uint32_t SizeOfOpcode = 1; uint32_t CurrEndOffset = 0;
constexpr uint32_t SizeOfForm = 1; constexpr uint32_t SizeOfOP = 1;
constexpr uint32_t SizeOfSizeField = 1;
int32_t SizeDiff = 0;
// Encoding [size of expression] [opcode] [value] [opcode] [value]
for (auto &Expr : LocExpr) { for (auto &Expr : LocExpr) {
PrevEndOffset = CurrEndOffset;
CurrEndOffset = Expr.getEndOffset();
if (!(Expr.getCode() == dwarf::DW_OP_GNU_addr_index || if (!(Expr.getCode() == dwarf::DW_OP_GNU_addr_index ||
Expr.getCode() == dwarf::DW_OP_addrx)) Expr.getCode() == dwarf::DW_OP_addrx))
continue; continue;
const uint64_t Index = Expr.getRawOperand(0); const uint64_t Index = Expr.getRawOperand(0);
Optional<object::SectionedAddress> EntryAddress = Optional<object::SectionedAddress> EntryAddress =
Unit.getAddrOffsetSectionItem(Index); Unit.getAddrOffsetSectionItem(Index);
assert(EntryAddress && "Address is not found."); assert(EntryAddress && "Address is not found.");
assert(Index <= std::numeric_limits<uint32_t>::max() && assert(Index <= std::numeric_limits<uint32_t>::max() &&
"Invalid Operand Index."); "Invalid Operand Index.");
if (Expr.getCode() == dwarf::DW_OP_addrx) { if (Expr.getCode() == dwarf::DW_OP_addrx) {
const uint32_t EncodingSize = const uint32_t EncodingSize = CurrEndOffset - PrevEndOffset - 1;
Expr.getOperandEndOffset(0) - PrevOffset - SizeOfOpcode;
const uint32_t Index = AddrWriter->getIndexFromAddress( const uint32_t Index = AddrWriter->getIndexFromAddress(
EntryAddress->Address, Unit); EntryAddress->Address, Unit);
// Encoding new size. // Encoding new size.
SmallString<8> Tmp; SmallString<8> Tmp;
raw_svector_ostream OSE(Tmp); raw_svector_ostream OSE(Tmp);
encodeULEB128(Index, OSE); encodeULEB128(Index, OSE);
DebugInfoPatcher.addUDataPatch(AttrOffset, Tmp.size() + 1, 1); SizeDiff += Tmp.size() - EncodingSize;
DebugInfoPatcher.addUDataPatch(AttrOffset + PrevOffset + DebugInfoPatcher.addUDataPatch(AttrOffset + PrevEndOffset +
SizeOfOpcode + SizeOfForm, SizeOfOP + SizeOfSizeField,
Index, EncodingSize); Index, EncodingSize);
} else { } else {
// TODO: Re-do this as DWARF5. // TODO: Re-do this as DWARF5.
AddrWriter->addIndexAddress(EntryAddress->Address, AddrWriter->addIndexAddress(EntryAddress->Address,
static_cast<uint32_t>(Index), Unit); static_cast<uint32_t>(Index), Unit);
} }
if (Expr.getDescription().Op[1] ==
DWARFExpression::Operation::SizeNA)
PrevOffset = Expr.getOperandEndOffset(0);
else
PrevOffset = Expr.getOperandEndOffset(1);
} }
// Updating the size of the experssion.
maksfbUnsubmitted
Done
ReplyInline Actions
static_cast<uint32_t>(Index), Unit);
}
}
- // Updating the size of the experssion.
+ // Update the size of the expression.
if (Updated)
maksfb:
if (SizeDiff)
DebugInfoPatcher.addUDataPatch(AttrOffset,
maksfbUnsubmitted
Done
ReplyInline Actions

Do you have to update when SizeDiff == 0?

maksfb: Do you have to update when `SizeDiff == 0`?
ayermoloAuthorUnsubmitted
Done
ReplyInline Actions

ah good point!

ayermolo: ah good point!
SizeDiff + CurrEndOffset, 1);
} }
} }
} else if (Optional<AttrInfo> AttrVal = } else if (Optional<AttrInfo> AttrVal =
findAttributeInfo(DIE, dwarf::DW_AT_low_pc)) { findAttributeInfo(DIE, dwarf::DW_AT_low_pc)) {
AttrOffset = AttrVal->Offset; AttrOffset = AttrVal->Offset;
Value = AttrVal->V; Value = AttrVal->V;
const Optional<uint64_t> Result = Value.getAsAddress(); const Optional<uint64_t> Result = Value.getAsAddress();
if (Result.hasValue()) { if (Result.hasValue()) {
▲ Show 20 Lines • Show All 1,238 Lines • Show Last 20 Lines

bolt/test/X86/dwarf5-multiple-dw-op-addrx-locexpr.s

  • This file was added.
# REQUIRES: system-linux
# RUN: llvm-mc -dwarf-version=5 -filetype=obj -triple x86_64-unknown-linux %s -o %t1.o
# RUN: %clang %cflags -dwarf-5 %t1.o -o %t.exe -Wl,-q
# RUN: llvm-bolt %t.exe -o %t.bolt --update-debug-sections
# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.exe | FileCheck --check-prefix=PRECHECK %s
# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.bolt | FileCheck --check-prefix=CHECK %s
# PRECHECK: DW_TAG_variable
# PRECHECK: DW_AT_name [DW_FORM_strx1]
# PRECHECK: DW_AT_type [DW_FORM_ref4]
# PRECHECK: DW_AT_decl_file [DW_FORM_data1]
# PRECHECK: DW_AT_decl_line [DW_FORM_data1]
# PRECHECK: DW_AT_location [DW_FORM_exprloc] (DW_OP_addrx 0x0, DW_OP_piece 0x4, DW_OP_addrx 0x1, DW_OP_piece 0x4)
# CHECK: DW_TAG_variable
# CHECK: DW_AT_name [DW_FORM_strx1]
# CHECK: DW_AT_type [DW_FORM_ref4]
# CHECK: DW_AT_decl_file [DW_FORM_data1]
# CHECK: DW_AT_decl_line [DW_FORM_data1]
# CHECK: DW_AT_location [DW_FORM_exprloc] (DW_OP_addrx 0x4, DW_OP_piece 0x4, DW_OP_addrx 0x5, DW_OP_piece 0x4)
# This test checks that we update DW_AT_location [DW_FORM_exprloc] with multiple DW_OP_addrx.
# struct pair {int i; int j; };
# static pair p;
# int load() {
# return p.i + p.j;
# }
# void store(int i, int j) {
# p.i = i;
# p.j = j;
# }
# int main() {
# return 0;
# }
.text
.file "main.cpp"
.file 0 "task" "main.cpp" md5 0x02662c1bdb2472436fee6b36e4dca0e0
.globl _Z4loadv # -- Begin function _Z4loadv
.p2align 4, 0x90
.type _Z4loadv,@function
_Z4loadv: # @_Z4loadv
.Lfunc_begin0:
.loc 0 3 0 # main.cpp:3:0
.cfi_startproc
# %bb.0: # %entry
.loc 0 4 20 prologue_end # main.cpp:4:20
movl _ZL1p.1(%rip), %eax
.loc 0 4 16 is_stmt 0 # main.cpp:4:16
addl _ZL1p.0(%rip), %eax
.loc 0 4 5 # main.cpp:4:5
retq
.Ltmp0:
.Lfunc_end0:
.size _Z4loadv, .Lfunc_end0-_Z4loadv
.cfi_endproc
# -- End function
.globl _Z5storeii # -- Begin function _Z5storeii
.p2align 4, 0x90
.type _Z5storeii,@function
_Z5storeii: # @_Z5storeii
.Lfunc_begin1:
.loc 0 6 0 is_stmt 1 # main.cpp:6:0
.cfi_startproc
# %bb.0: # %entry
#DEBUG_VALUE: store:i <- $edi
#DEBUG_VALUE: store:j <- $esi
.loc 0 7 9 prologue_end # main.cpp:7:9
movl %edi, _ZL1p.0(%rip)
.loc 0 8 11 # main.cpp:8:11
movl %esi, _ZL1p.1(%rip)
.loc 0 9 1 # main.cpp:9:1
retq
.Ltmp1:
.Lfunc_end1:
.size _Z5storeii, .Lfunc_end1-_Z5storeii
.cfi_endproc
# -- End function
.globl main # -- Begin function main
.p2align 4, 0x90
.type main,@function
main: # @main
.Lfunc_begin2:
.loc 0 10 0 # main.cpp:10:0
.cfi_startproc
# %bb.0: # %entry
.loc 0 11 1 prologue_end # main.cpp:11:1
xorl %eax, %eax
retq
.Ltmp2:
.Lfunc_end2:
.size main, .Lfunc_end2-main
.cfi_endproc
# -- End function
.type _ZL1p.0,@object # @_ZL1p.0
.local _ZL1p.0
.comm _ZL1p.0,4,4
.type _ZL1p.1,@object # @_ZL1p.1
.local _ZL1p.1
.comm _ZL1p.1,4,4
.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 52 # DW_TAG_variable
.byte 0 # DW_CHILDREN_no
.byte 3 # DW_AT_name
.byte 37 # DW_FORM_strx1
.byte 73 # DW_AT_type
.byte 19 # DW_FORM_ref4
.byte 58 # DW_AT_decl_file
.byte 11 # DW_FORM_data1
.byte 59 # DW_AT_decl_line
.byte 11 # DW_FORM_data1
.byte 2 # DW_AT_location
.byte 24 # DW_FORM_exprloc
.byte 110 # DW_AT_linkage_name
.byte 37 # DW_FORM_strx1
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 3 # Abbreviation Code
.byte 19 # DW_TAG_structure_type
.byte 1 # DW_CHILDREN_yes
.byte 54 # DW_AT_calling_convention
.byte 11 # DW_FORM_data1
.byte 3 # DW_AT_name
.byte 37 # DW_FORM_strx1
.byte 11 # DW_AT_byte_size
.byte 11 # DW_FORM_data1
.byte 58 # DW_AT_decl_file
.byte 11 # DW_FORM_data1
.byte 59 # DW_AT_decl_line
.byte 11 # DW_FORM_data1
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 4 # Abbreviation Code
.byte 13 # DW_TAG_member
.byte 0 # DW_CHILDREN_no
.byte 3 # DW_AT_name
.byte 37 # DW_FORM_strx1
.byte 73 # DW_AT_type
.byte 19 # DW_FORM_ref4
.byte 58 # DW_AT_decl_file
.byte 11 # DW_FORM_data1
.byte 59 # DW_AT_decl_line
.byte 11 # DW_FORM_data1
.byte 56 # DW_AT_data_member_location
.byte 11 # DW_FORM_data1
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 5 # 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 6 # 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 122 # DW_AT_call_all_calls
.byte 25 # DW_FORM_flag_present
.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 7 # Abbreviation Code
.byte 46 # DW_TAG_subprogram
.byte 1 # DW_CHILDREN_yes
.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 122 # DW_AT_call_all_calls
.byte 25 # DW_FORM_flag_present
.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 63 # DW_AT_external
.byte 25 # DW_FORM_flag_present
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 8 # Abbreviation Code
.byte 5 # DW_TAG_formal_parameter
.byte 0 # DW_CHILDREN_no
.byte 2 # DW_AT_location
.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 0 # EOM(1)
.byte 0 # EOM(2)
.byte 9 # 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 122 # DW_AT_call_all_calls
.byte 25 # DW_FORM_flag_present
.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 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:0x87 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 2 # DW_AT_low_pc
.long .Lfunc_end2-.Lfunc_begin0 # DW_AT_high_pc
.long .Laddr_table_base0 # DW_AT_addr_base
.byte 2 # Abbrev [2] 0x23:0x12 DW_TAG_variable
.byte 3 # DW_AT_name
.long 53 # DW_AT_type
.byte 0 # DW_AT_decl_file
.byte 2 # DW_AT_decl_line
.byte 8 # DW_AT_location
.byte 161
.byte 0
.byte 147
.byte 4
.byte 161
.byte 1
.byte 147
.byte 4
.byte 8 # DW_AT_linkage_name
.byte 3 # Abbrev [3] 0x35:0x19 DW_TAG_structure_type
.byte 5 # DW_AT_calling_convention
.byte 7 # DW_AT_name
.byte 8 # DW_AT_byte_size
.byte 0 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line
.byte 4 # Abbrev [4] 0x3b:0x9 DW_TAG_member
.byte 4 # DW_AT_name
.long 78 # DW_AT_type
.byte 0 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line
.byte 0 # DW_AT_data_member_location
.byte 4 # Abbrev [4] 0x44:0x9 DW_TAG_member
.byte 6 # DW_AT_name
.long 78 # DW_AT_type
.byte 0 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line
.byte 4 # DW_AT_data_member_location
.byte 0 # End Of Children Mark
.byte 5 # Abbrev [5] 0x4e:0x4 DW_TAG_base_type
.byte 5 # DW_AT_name
.byte 5 # DW_AT_encoding
.byte 4 # DW_AT_byte_size
.byte 6 # Abbrev [6] 0x52:0x10 DW_TAG_subprogram
.byte 2 # DW_AT_low_pc
.long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
.byte 1 # DW_AT_frame_base
.byte 87
# DW_AT_call_all_calls
.byte 9 # DW_AT_linkage_name
.byte 10 # DW_AT_name
.byte 0 # DW_AT_decl_file
.byte 3 # DW_AT_decl_line
.long 78 # DW_AT_type
# DW_AT_external
.byte 7 # Abbrev [7] 0x62:0x21 DW_TAG_subprogram
.byte 3 # DW_AT_low_pc
.long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc
.byte 1 # DW_AT_frame_base
.byte 87
# DW_AT_call_all_calls
.byte 11 # DW_AT_linkage_name
.byte 12 # DW_AT_name
.byte 0 # DW_AT_decl_file
.byte 6 # DW_AT_decl_line
# DW_AT_external
.byte 8 # Abbrev [8] 0x6e:0xa DW_TAG_formal_parameter
.byte 1 # DW_AT_location
.byte 85
.byte 4 # DW_AT_name
.byte 0 # DW_AT_decl_file
.byte 6 # DW_AT_decl_line
.long 78 # DW_AT_type
.byte 8 # Abbrev [8] 0x78:0xa DW_TAG_formal_parameter
.byte 1 # DW_AT_location
.byte 84
.byte 6 # DW_AT_name
.byte 0 # DW_AT_decl_file
.byte 6 # DW_AT_decl_line
.long 78 # DW_AT_type
.byte 0 # End Of Children Mark
.byte 9 # Abbrev [9] 0x83:0xf DW_TAG_subprogram
.byte 4 # DW_AT_low_pc
.long .Lfunc_end2-.Lfunc_begin2 # DW_AT_high_pc
.byte 1 # DW_AT_frame_base
.byte 87
# DW_AT_call_all_calls
.byte 13 # DW_AT_name
.byte 0 # DW_AT_decl_file
.byte 10 # DW_AT_decl_line
.long 78 # DW_AT_type
# DW_AT_external
.byte 0 # End Of Children Mark
.Ldebug_info_end0:
.section .debug_str_offsets,"",@progbits
.long 60 # 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=134
.Linfo_string2:
.asciz "test" # string offset=143
.Linfo_string3:
.asciz "p" # string offset=181
.Linfo_string4:
.asciz "i" # string offset=183
.Linfo_string5:
.asciz "int" # string offset=185
.Linfo_string6:
.asciz "j" # string offset=189
.Linfo_string7:
.asciz "pair" # string offset=191
.Linfo_string8:
.asciz "_ZL1p" # string offset=196
.Linfo_string9:
.asciz "_Z4loadv" # string offset=202
.Linfo_string10:
.asciz "load" # string offset=211
.Linfo_string11:
.asciz "_Z5storeii" # string offset=216
.Linfo_string12:
.asciz "store" # string offset=227
.Linfo_string13:
.asciz "main" # string offset=233
.section .debug_str_offsets,"",@progbits
.long .Linfo_string0
.long .Linfo_string1
.long .Linfo_string2
.long .Linfo_string3
.long .Linfo_string4
.long .Linfo_string5
.long .Linfo_string6
.long .Linfo_string7
.long .Linfo_string8
.long .Linfo_string9
.long .Linfo_string10
.long .Linfo_string11
.long .Linfo_string12
.long .Linfo_string13
.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 _ZL1p.0
.quad _ZL1p.1
.quad .Lfunc_begin0
.quad .Lfunc_begin1
.quad .Lfunc_begin2
.Ldebug_addr_end0:
.ident "clang version 15.0.0"
.section ".note.GNU-stack","",@progbits
.addrsig
.section .debug_line,"",@progbits
.Lline_table_start0: