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[BOLT][DWARF] Skip processing DWARF CUs with a DWO ID but no DWO name (#154749)

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This patch tries to skip processing DWARF CUs with a DWO ID but no DWO
name, and ensure them not included in the final binary.
This commit is contained in:
Jinjie Huang
2025-09-23 16:31:03 +08:00
committed by GitHub
parent 925ea5554d
commit e6540d20cf
5 changed files with 657 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
bolt/include/bolt/Core/BinaryContext.h
View File

@@ -326,6 +326,9 @@ public:
/// Returns true if DWARF4 or lower is used.
bool isDWARFLegacyUsed() const { return ContainsDwarfLegacy; }
/// Returns true if DWARFUnit is valid.
bool isValidDwarfUnit(DWARFUnit &DU) const;
std::map<unsigned, DwarfLineTable> &getDwarfLineTables() {
return DwarfLineTablesCUMap;
}

3
bolt/include/bolt/Core/DIEBuilder.h
View File

@@ -217,7 +217,8 @@ private:
std::optional<BOLTDWARF5AccelTableData *> Parent,
uint32_t NumberParentsInChain);
void registerUnit(DWARFUnit &DU, bool NeedSort);
/// Returns true if DWARFUnit is registered successfully.
bool registerUnit(DWARFUnit &DU, bool NeedSort);
/// \return the unique ID of \p U if it exists.
std::optional<uint32_t> getUnitId(const DWARFUnit &DU);

16
bolt/lib/Core/BinaryContext.cpp
View File

@@ -1624,10 +1624,26 @@ DWARFContext *BinaryContext::getDWOContext() const {
return &DWOCUs.begin()->second->getContext();
}
bool BinaryContext::isValidDwarfUnit(DWARFUnit &DU) const {
// Invalid DWARF unit with a DWOId but lacking a dwo_name.
if (DU.getDWOId() && !DU.isDWOUnit() &&
!DU.getUnitDIE().find(
{dwarf::DW_AT_dwo_name, dwarf::DW_AT_GNU_dwo_name})) {
this->outs() << "BOLT-ERROR: broken DWARF found in CU at offset 0x"
<< Twine::utohexstr(DU.getOffset()) << " (DWOId=0x"
<< Twine::utohexstr(*(DU.getDWOId()))
<< ", missing DW_AT_dwo_name / DW_AT_GNU_dwo_name)\n";
return false;
}
return true;
}
/// Handles DWO sections that can either be in .o, .dwo or .dwp files.
void BinaryContext::preprocessDWODebugInfo() {
for (const std::unique_ptr<DWARFUnit> &CU : DwCtx->compile_units()) {
DWARFUnit *const DwarfUnit = CU.get();
if (!isValidDwarfUnit(*DwarfUnit))
continue;
if (std::optional<uint64_t> DWOId = DwarfUnit->getDWOId()) {
std::string DWOName = dwarf::toString(
DwarfUnit->getUnitDIE().find(

10
bolt/lib/Core/DIEBuilder.cpp
View File

@@ -584,7 +584,8 @@ DWARFDie DIEBuilder::resolveDIEReference(
if ((RefCU =
getUnitForOffset(*this, *DwarfContext, TmpRefOffset, AttrSpec))) {
/// Trying to add to current working set in case it's cross CU reference.
registerUnit(*RefCU, true);
if (!registerUnit(*RefCU, true))
return DWARFDie();
DWARFDataExtractor DebugInfoData = RefCU->getDebugInfoExtractor();
if (DwarfDebugInfoEntry.extractFast(*RefCU, &TmpRefOffset, DebugInfoData,
RefCU->getNextUnitOffset(), 0)) {
@@ -1008,12 +1009,14 @@ static uint64_t getHash(const DWARFUnit &DU) {
return DU.getOffset();
}
void DIEBuilder::registerUnit(DWARFUnit &DU, bool NeedSort) {
bool DIEBuilder::registerUnit(DWARFUnit &DU, bool NeedSort) {
if (!BC.isValidDwarfUnit(DU))
return false;
auto IterGlobal = AllProcessed.insert(getHash(DU));
// If DU is already in a current working set or was already processed we can
// skip it.
if (!IterGlobal.second)
return;
return true;
if (getState().Type == ProcessingType::DWARF4TUs) {
getState().DWARF4TUVector.push_back(&DU);
} else if (getState().Type == ProcessingType::DWARF5TUs) {
@@ -1034,6 +1037,7 @@ void DIEBuilder::registerUnit(DWARFUnit &DU, bool NeedSort) {
if (getState().DUList.size() == getState().CloneUnitCtxMap.size())
getState().CloneUnitCtxMap.emplace_back();
getState().DUList.push_back(&DU);
return true;
}
std::optional<uint32_t> DIEBuilder::getUnitId(const DWARFUnit &DU) {

629
bolt/test/X86/dwarf5-dwoid-no-dwoname.s Normal file
View File

@@ -0,0 +1,629 @@
## Check that DWARF CU with a valid DWOId but missing a dwo_name is correctly detected.
# RUN: rm -rf %t && mkdir -p %t && cd %t
# RUN: llvm-mc -dwarf-version=5 -filetype=obj -triple x86_64-unknown-linux %s -split-dwarf-file=main.dwo -o main.o
# RUN: %clang -O3 -g -gdwarf-5 -gsplit-dwarf -Wl,-q %t/main.o -o main.exe
# RUN: llvm-bolt %t/main.exe -o %t/main.exe.bolt -update-debug-sections 2>&1 | FileCheck %s --check-prefix=PRECHECK
# PRECHECK: BOLT-ERROR: broken DWARF found in CU at offset 0x3e (DWOId=0x0, missing DW_AT_dwo_name / DW_AT_GNU_dwo_name)
## Checks that Broken dwarf CU is removed
# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t/main.exe.bolt | FileCheck %s --check-prefix=POSTCHECK
# POSTCHECK-LABEL: .debug_info contents:
# POSTCHECK: DW_TAG_skeleton_unit
# POSTCHECK-DAG: DW_AT_dwo_name{{.*=.*\.dwo.*}}
# POSTCHECK: NULL
# POSTCHECK-NOT: DW_TAG_skeleton_unit
.text
.file "main.cpp"
.section .rodata.cst16,"aM",@progbits,16
.LCPI0_0:
.LCPI0_1:
.LCPI0_2:
.LCPI0_3:
.LCPI0_4:
.LCPI0_5:
.LCPI0_6:
.LCPI0_7:
.LCPI0_8:
.LCPI0_9:
.LCPI0_10:
.text
.globl main
.type main,@function
main: # @main
.Lfunc_begin0:
.file 1 "." "main.cpp" md5 0x8a68374187457ce14ac0c6c2121349a2
.loc 1 5 0 # main.cpp:5:0
# %bb.0: # %vector.ph
.Ltmp0:
.Ltmp1:
.LBB0_1: # %vector.body
.Ltmp2:
.file 2 "." "callee.cpp" md5 0x86e19c24983503540b9bb1a6f7bad737
.loc 2 8 15 prologue_end # callee.cpp:8:15
.Ltmp3:
.loc 2 3 15 # callee.cpp:3:15
.Ltmp4:
.loc 2 8 15 # callee.cpp:8:15
.Ltmp5:
.loc 2 9 19 # callee.cpp:9:19
.Ltmp6:
.loc 2 9 13 is_stmt 0 # callee.cpp:9:13
.Ltmp7:
.loc 2 3 15 is_stmt 1 # callee.cpp:3:15
.loc 2 3 19 is_stmt 0 # callee.cpp:3:19
.Ltmp8:
.loc 2 4 19 is_stmt 1 # callee.cpp:4:19
.Ltmp9:
.loc 2 4 13 is_stmt 0 # callee.cpp:4:13
.Ltmp10:
.loc 2 4 19 # callee.cpp:4:19
.Ltmp11:
.loc 2 4 13 # callee.cpp:4:13
.Ltmp12:
.loc 2 2 12 is_stmt 1 # callee.cpp:2:12
.loc 2 2 17 is_stmt 0 # callee.cpp:2:17
.Ltmp13:
.loc 2 4 13 is_stmt 1 # callee.cpp:4:13
.Ltmp14:
.loc 2 0 0 is_stmt 0 # callee.cpp:0:0
.Ltmp15:
.loc 1 8 13 is_stmt 1 # main.cpp:8:13
.Ltmp16:
.loc 2 0 0 is_stmt 0 # callee.cpp:0:0
.Ltmp17:
.loc 1 8 13 # main.cpp:8:13
.Ltmp18:
.loc 1 7 35 is_stmt 1 # main.cpp:7:35
.Ltmp19:
# %bb.2: # %middle.block
.loc 1 7 5 is_stmt 0 # main.cpp:7:5
.Ltmp20:
.loc 1 11 9 is_stmt 1 # main.cpp:11:9
.Ltmp21:
.loc 1 15 1 # main.cpp:15:1
retq
.Ltmp22:
.Lfunc_end0:
.size main, .Lfunc_end0-main
.section .debug_abbrev,"",@progbits
.byte 1 # Abbreviation Code
.byte 74 # DW_TAG_skeleton_unit
.byte 1 # DW_CHILDREN_yes
.byte 16 # DW_AT_stmt_list
.byte 23 # DW_FORM_sec_offset
.byte 114 # DW_AT_str_offsets_base
.byte 23 # DW_FORM_sec_offset
.byte 27 # DW_AT_comp_dir
.byte 37 # DW_FORM_strx1
.ascii "\264B" # DW_AT_GNU_pubnames
.byte 25 # DW_FORM_flag_present
.byte 118 # DW_AT_dwo_name
.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 116 # DW_AT_rnglists_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 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 3 # DW_AT_name
.byte 37 # DW_FORM_strx1
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 3 # Abbreviation Code
.byte 29 # DW_TAG_inlined_subroutine
.byte 0 # DW_CHILDREN_no
.byte 49 # DW_AT_abstract_origin
.byte 16 # DW_FORM_ref_addr
.byte 85 # DW_AT_ranges
.byte 35 # DW_FORM_rnglistx
.byte 88 # DW_AT_call_file
.byte 11 # DW_FORM_data1
.byte 89 # DW_AT_call_line
.byte 11 # DW_FORM_data1
.byte 87 # DW_AT_call_column
.byte 11 # DW_FORM_data1
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 4 # Abbreviation Code
.byte 74 # DW_TAG_skeleton_unit
.byte 1 # DW_CHILDREN_yes
.byte 16 # DW_AT_stmt_list
.byte 23 # DW_FORM_sec_offset
.byte 114 # DW_AT_str_offsets_base
.byte 23 # DW_FORM_sec_offset
.byte 27 # DW_AT_comp_dir
.byte 37 # DW_FORM_strx1
.ascii "\264B" # DW_AT_GNU_pubnames
.byte 25 # DW_FORM_flag_present
.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 115 # DW_AT_addr_base
.byte 23 # DW_FORM_sec_offset
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 5 # Abbreviation Code
.byte 46 # DW_TAG_subprogram
.byte 0 # DW_CHILDREN_no
.byte 3 # DW_AT_name
.byte 37 # DW_FORM_strx1
.byte 32 # DW_AT_inline
.byte 33 # DW_FORM_implicit_const
.byte 1
.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 4 # DWARF Unit Type
.byte 8 # Address Size (in bytes)
.long .debug_abbrev # Offset Into Abbrev. Section
.quad -1861901018463438211
.byte 1 # Abbrev [1] 0x14:0x2a DW_TAG_skeleton_unit
.long .Lline_table_start0 # DW_AT_stmt_list
.long .Lstr_offsets_base0 # DW_AT_str_offsets_base
.byte 0 # DW_AT_comp_dir
# DW_AT_GNU_pubnames
.byte 3 # DW_AT_dwo_name
.byte 0 # DW_AT_low_pc
.long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
.long .Laddr_table_base0 # DW_AT_addr_base
.long .Lrnglists_table_base0 # DW_AT_rnglists_base
.byte 2 # Abbrev [2] 0x2c:0x11 DW_TAG_subprogram
.byte 0 # DW_AT_low_pc
.long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
.byte 2 # DW_AT_name
.byte 3 # Abbrev [3] 0x33:0x9 DW_TAG_inlined_subroutine
.long .debug_info+100 # DW_AT_abstract_origin
.byte 0 # DW_AT_ranges
.byte 1 # DW_AT_call_file
.byte 8 # DW_AT_call_line
.byte 16 # DW_AT_call_column
.byte 0 # End Of Children Mark
.byte 0 # End Of Children Mark
.Ldebug_info_end0:
.Lcu_begin1:
.long .Ldebug_info_end1-.Ldebug_info_start1 # Length of Unit
.Ldebug_info_start1:
.short 5 # DWARF version number
.byte 4 # DWARF Unit Type
.byte 8 # Address Size (in bytes)
.long .debug_abbrev # Offset Into Abbrev. Section
.quad 0
.byte 4 # Abbrev [4] 0x14:0x15 DW_TAG_skeleton_unit
.long .Lline_table_start0 # DW_AT_stmt_list
.long .Lstr_offsets_base0 # DW_AT_str_offsets_base
.byte 0 # DW_AT_comp_dir
# DW_AT_GNU_pubnames
.byte 4 # DW_AT_producer
.short 33 # DW_AT_language
.byte 5 # DW_AT_name
.long .Laddr_table_base0 # DW_AT_addr_base
.byte 5 # Abbrev [5] 0x26:0x2 DW_TAG_subprogram
.byte 1 # DW_AT_name
# DW_AT_inline
.byte 0 # End Of Children Mark
.Ldebug_info_end1:
.section .debug_rnglists,"",@progbits
.long .Ldebug_list_header_end0-.Ldebug_list_header_start0 # Length
.Ldebug_list_header_start0:
.short 5 # Version
.byte 8 # Address size
.byte 0 # Segment selector size
.long 1 # Offset entry count
.Lrnglists_table_base0:
.long .Ldebug_ranges1-.Lrnglists_table_base0
.Ldebug_ranges1:
.byte 4 # DW_RLE_offset_pair
.uleb128 .Ltmp2-.Lfunc_begin0 # starting offset
.uleb128 .Ltmp15-.Lfunc_begin0 # ending offset
.byte 4 # DW_RLE_offset_pair
.uleb128 .Ltmp16-.Lfunc_begin0 # starting offset
.uleb128 .Ltmp17-.Lfunc_begin0 # ending offset
.byte 0 # DW_RLE_end_of_list
.Ldebug_list_header_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
.Lskel_string0:
.asciz "." # string offset=0
.Lskel_string1:
.asciz "hotFunction" # string offset=45
.Lskel_string2:
.asciz "main" # string offset=57
.Lskel_string3:
.asciz "main.dwo" # string offset=62
.Lskel_string4:
.asciz "clang version 16.0.6" # string offset=71
.Lskel_string5:
.asciz "callee.cpp" # string offset=177
.section .debug_str_offsets,"",@progbits
.long .Lskel_string0
.long .Lskel_string1
.long .Lskel_string2
.long .Lskel_string3
.long .Lskel_string4
.long .Lskel_string5
.section .debug_str_offsets.dwo,"e",@progbits
.long 56 # Length of String Offsets Set
.short 5
.short 0
.section .debug_str.dwo,"eMS",@progbits,1
.Linfo_string0:
.asciz "_Z11hotFunctioni" # string offset=0
.Linfo_string1:
.asciz "hotFunction" # string offset=17
.Linfo_string2:
.asciz "int" # string offset=29
.Linfo_string3:
.asciz "x" # string offset=33
.Linfo_string4:
.asciz "main" # string offset=35
.Linfo_string5:
.asciz "argc" # string offset=40
.Linfo_string6:
.asciz "argv" # string offset=45
.Linfo_string7:
.asciz "char" # string offset=50
.Linfo_string8:
.asciz "sum" # string offset=55
.Linfo_string9:
.asciz "i" # string offset=59
.Linfo_string10:
.asciz "clang version 16.0.6" # string offset=61
.Linfo_string11:
.asciz "main.cpp" # string offset=167
.Linfo_string12:
.asciz "main.dwo" # string offset=176
.section .debug_str_offsets.dwo,"e",@progbits
.long 0
.long 17
.long 29
.long 33
.long 35
.long 40
.long 45
.long 50
.long 55
.long 59
.long 61
.long 167
.long 176
.section .debug_info.dwo,"e",@progbits
.long .Ldebug_info_dwo_end0-.Ldebug_info_dwo_start0 # Length of Unit
.Ldebug_info_dwo_start0:
.short 5 # DWARF version number
.byte 5 # DWARF Unit Type
.byte 8 # Address Size (in bytes)
.long 0 # Offset Into Abbrev. Section
.quad -1861901018463438211
.byte 1 # Abbrev [1] 0x14:0x71 DW_TAG_compile_unit
.byte 10 # DW_AT_producer
.short 33 # DW_AT_language
.byte 11 # DW_AT_name
.byte 12 # DW_AT_dwo_name
.byte 2 # Abbrev [2] 0x1a:0x12 DW_TAG_subprogram
.byte 0 # DW_AT_linkage_name
.byte 1 # DW_AT_name
.byte 2 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line
.long 44 # DW_AT_type
# DW_AT_external
# DW_AT_inline
.byte 3 # Abbrev [3] 0x23:0x8 DW_TAG_formal_parameter
.byte 3 # DW_AT_name
.byte 2 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line
.long 44 # DW_AT_type
.byte 0 # End Of Children Mark
.byte 4 # Abbrev [4] 0x2c:0x4 DW_TAG_base_type
.byte 2 # DW_AT_name
.byte 5 # DW_AT_encoding
.byte 4 # DW_AT_byte_size
.byte 5 # Abbrev [5] 0x30:0x46 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 87
# DW_AT_call_all_calls
.byte 4 # DW_AT_name
.byte 1 # DW_AT_decl_file
.byte 5 # DW_AT_decl_line
.long 44 # DW_AT_type
# DW_AT_external
.byte 6 # Abbrev [6] 0x3f:0xa DW_TAG_formal_parameter
.byte 1 # DW_AT_location
.byte 85
.byte 5 # DW_AT_name
.byte 1 # DW_AT_decl_file
.byte 5 # DW_AT_decl_line
.long 44 # DW_AT_type
.byte 6 # Abbrev [6] 0x49:0xa DW_TAG_formal_parameter
.byte 1 # DW_AT_location
.byte 84
.byte 6 # DW_AT_name
.byte 1 # DW_AT_decl_file
.byte 5 # DW_AT_decl_line
.long 118 # DW_AT_type
.byte 7 # Abbrev [7] 0x53:0x9 DW_TAG_variable
.byte 0 # DW_AT_const_value
.byte 8 # DW_AT_name
.byte 1 # DW_AT_decl_file
.byte 6 # DW_AT_decl_line
.long 44 # DW_AT_type
.byte 8 # Abbrev [8] 0x5c:0x19 DW_TAG_lexical_block
.byte 1 # DW_AT_low_pc
.long .Ltmp20-.Ltmp2 # DW_AT_high_pc
.byte 7 # Abbrev [7] 0x62:0x9 DW_TAG_variable
.byte 0 # DW_AT_const_value
.byte 9 # DW_AT_name
.byte 1 # DW_AT_decl_file
.byte 7 # DW_AT_decl_line
.long 44 # DW_AT_type
.byte 9 # Abbrev [9] 0x6b:0x9 DW_TAG_inlined_subroutine
.long 26 # DW_AT_abstract_origin
.byte 0 # DW_AT_ranges
.byte 1 # DW_AT_call_file
.byte 8 # DW_AT_call_line
.byte 16 # DW_AT_call_column
.byte 0 # End Of Children Mark
.byte 0 # End Of Children Mark
.byte 10 # Abbrev [10] 0x76:0x5 DW_TAG_pointer_type
.long 123 # DW_AT_type
.byte 10 # Abbrev [10] 0x7b:0x5 DW_TAG_pointer_type
.long 128 # DW_AT_type
.byte 4 # Abbrev [4] 0x80:0x4 DW_TAG_base_type
.byte 7 # DW_AT_name
.byte 6 # DW_AT_encoding
.byte 1 # DW_AT_byte_size
.byte 0 # End Of Children Mark
.Ldebug_info_dwo_end0:
.section .debug_abbrev.dwo,"e",@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 118 # DW_AT_dwo_name
.byte 37 # DW_FORM_strx1
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 2 # Abbreviation Code
.byte 46 # DW_TAG_subprogram
.byte 1 # DW_CHILDREN_yes
.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 32 # DW_AT_inline
.byte 33 # DW_FORM_implicit_const
.byte 1
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 3 # Abbreviation Code
.byte 5 # DW_TAG_formal_parameter
.byte 0 # DW_CHILDREN_no
.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 4 # 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 5 # 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 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 6 # 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 7 # Abbreviation Code
.byte 52 # DW_TAG_variable
.byte 0 # DW_CHILDREN_no
.byte 28 # DW_AT_const_value
.byte 13 # DW_FORM_sdata
.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 8 # Abbreviation Code
.byte 11 # DW_TAG_lexical_block
.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 0 # EOM(1)
.byte 0 # EOM(2)
.byte 9 # Abbreviation Code
.byte 29 # DW_TAG_inlined_subroutine
.byte 0 # DW_CHILDREN_no
.byte 49 # DW_AT_abstract_origin
.byte 19 # DW_FORM_ref4
.byte 85 # DW_AT_ranges
.byte 35 # DW_FORM_rnglistx
.byte 88 # DW_AT_call_file
.byte 11 # DW_FORM_data1
.byte 89 # DW_AT_call_line
.byte 11 # DW_FORM_data1
.byte 87 # DW_AT_call_column
.byte 11 # DW_FORM_data1
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 10 # Abbreviation Code
.byte 15 # DW_TAG_pointer_type
.byte 0 # DW_CHILDREN_no
.byte 73 # DW_AT_type
.byte 19 # DW_FORM_ref4
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 0 # EOM(3)
.section .debug_rnglists.dwo,"e",@progbits
.long .Ldebug_list_header_end1-.Ldebug_list_header_start1 # Length
.Ldebug_list_header_start1:
.short 5 # Version
.byte 8 # Address size
.byte 0 # Segment selector size
.long 1 # Offset entry count
.Lrnglists_dwo_table_base0:
.long .Ldebug_ranges0-.Lrnglists_dwo_table_base0
.Ldebug_ranges0:
.byte 4 # DW_RLE_offset_pair
.uleb128 .Ltmp2-.Lfunc_begin0 # starting offset
.uleb128 .Ltmp15-.Lfunc_begin0 # ending offset
.byte 4 # DW_RLE_offset_pair
.uleb128 .Ltmp16-.Lfunc_begin0 # starting offset
.uleb128 .Ltmp17-.Lfunc_begin0 # ending offset
.byte 0 # DW_RLE_end_of_list
.Ldebug_list_header_end1:
.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
.quad .Ltmp2
.Ldebug_addr_end0:
.section .debug_gnu_pubnames,"",@progbits
.long .LpubNames_end0-.LpubNames_start0 # Length of Public Names Info
.LpubNames_start0:
.short 2 # DWARF Version
.long .Lcu_begin0 # Offset of Compilation Unit Info
.long 62 # Compilation Unit Length
.long 26 # DIE offset
.byte 48 # Attributes: FUNCTION, EXTERNAL
.asciz "hotFunction" # External Name
.long 48 # DIE offset
.byte 48 # Attributes: FUNCTION, EXTERNAL
.asciz "main" # External Name
.long 0 # End Mark
.LpubNames_end0:
.section .debug_gnu_pubtypes,"",@progbits
.long .LpubTypes_end0-.LpubTypes_start0 # Length of Public Types Info
.LpubTypes_start0:
.short 2 # DWARF Version
.long .Lcu_begin0 # Offset of Compilation Unit Info
.long 62 # Compilation Unit Length
.long 44 # DIE offset
.byte 144 # Attributes: TYPE, STATIC
.asciz "int" # External Name
.long 128 # DIE offset
.byte 144 # Attributes: TYPE, STATIC
.asciz "char" # External Name
.long 0 # End Mark
.LpubTypes_end0:
.section .debug_gnu_pubnames,"",@progbits
.long .LpubNames_end1-.LpubNames_start1 # Length of Public Names Info
.LpubNames_start1:
.short 2 # DWARF Version
.long .Lcu_begin1 # Offset of Compilation Unit Info
.long 41 # Compilation Unit Length
.long 0 # End Mark
.LpubNames_end1:
.section .debug_gnu_pubtypes,"",@progbits
.long .LpubTypes_end1-.LpubTypes_start1 # Length of Public Types Info
.LpubTypes_start1:
.short 2 # DWARF Version
.long .Lcu_begin1 # Offset of Compilation Unit Info
.long 41 # Compilation Unit Length
.long 0 # End Mark
.LpubTypes_end1:
.ident "clang version 16.0.6"
.ident "clang version 16.0.6"
.section .GCC.command.line,"MS",@progbits,1
.zero 1
.ascii ""
.zero 1
.ascii ""
.zero 1
.section .debug_gnu_pubtypes,"",@progbits
.section ".note.GNU-stack","",@progbits
.addrsig
.section .debug_line,"",@progbits
.Lline_table_start0: