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[BOLT][DWARF] Fix parent chain in debug_names entries with forward declaration. (#93865)

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Previously when an entry was skipped in parent chain a child will point
to the next valid entry in the chain. After discussion in
https://github.com/llvm/llvm-project/pull/91808 this is not very useful.
Changed implemenation so that all the children of the entry that is
skipped won't have DW_IDX_parent.
This commit is contained in:
Alexander Yermolovich 2024-06-05 09:57:11 -07:00 committed by GitHub
parent baa6609fad
commit 61589b8599
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
5 changed files with 743 additions and 19 deletions
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7
bolt/include/bolt/Core/DIEBuilder.h
View File

@ -215,10 +215,9 @@ private:
/// Along with current CU, and DIE being processed and the new DIE offset to
/// be updated, it takes in Parents vector that can be empty if this DIE has
/// no parents.
uint32_t
finalizeDIEs(DWARFUnit &CU, DIE &Die,
std::vector<std::optional<BOLTDWARF5AccelTableData *>> &Parents,
uint32_t &CurOffset);
uint32_t finalizeDIEs(DWARFUnit &CU, DIE &Die,
std::optional<BOLTDWARF5AccelTableData *> Parent,
uint32_t NumberParentsInChain, uint32_t &CurOffset);
void registerUnit(DWARFUnit &DU, bool NeedSort);

7
bolt/include/bolt/Core/DebugNames.h
View File

@ -24,16 +24,17 @@ public:
BOLTDWARF5AccelTableData(const uint64_t DieOffset,
const std::optional<uint64_t> DefiningParentOffset,
const unsigned DieTag, const unsigned UnitID,
const bool IsTU,
const bool IsParentRoot, const bool IsTU,
const std::optional<unsigned> SecondUnitID)
: DWARF5AccelTableData(DieOffset, DefiningParentOffset, DieTag, UnitID,
IsTU),
SecondUnitID(SecondUnitID) {}
SecondUnitID(SecondUnitID), IsParentRoot(IsParentRoot) {}
uint64_t getDieOffset() const { return DWARF5AccelTableData::getDieOffset(); }
unsigned getDieTag() const { return DWARF5AccelTableData::getDieTag(); }
unsigned getUnitID() const { return DWARF5AccelTableData::getUnitID(); }
bool isTU() const { return DWARF5AccelTableData::isTU(); }
bool isParentRoot() const { return IsParentRoot; }
std::optional<unsigned> getSecondUnitID() const { return SecondUnitID; }
void setPatchOffset(uint64_t PatchOffset) { OffsetVal = PatchOffset; }
@ -41,6 +42,7 @@ public:
private:
std::optional<unsigned> SecondUnitID;
bool IsParentRoot;
};
class DWARF5AcceleratorTable {
@ -57,6 +59,7 @@ public:
std::optional<BOLTDWARF5AccelTableData *>
addAccelTableEntry(DWARFUnit &Unit, const DIE &Die,
const std::optional<uint64_t> &DWOID,
const uint32_t NumberParentsInChain,
std::optional<BOLTDWARF5AccelTableData *> &Parent);
/// Set current unit being processed.
void setCurrentUnit(DWARFUnit &Unit, const uint64_t UnitStartOffset);

29
bolt/lib/Core/DIEBuilder.cpp
View File

@ -461,32 +461,42 @@ getUnitForOffset(DIEBuilder &Builder, DWARFContext &DWCtx,
return nullptr;
}
uint32_t DIEBuilder::finalizeDIEs(
DWARFUnit &CU, DIE &Die,
std::vector<std::optional<BOLTDWARF5AccelTableData *>> &Parents,
uint32_t &CurOffset) {
uint32_t
DIEBuilder::finalizeDIEs(DWARFUnit &CU, DIE &Die,
std::optional<BOLTDWARF5AccelTableData *> Parent,
uint32_t NumberParentsInChain, uint32_t &CurOffset) {
getState().DWARFDieAddressesParsed.erase(Die.getOffset());
uint32_t CurSize = 0;
Die.setOffset(CurOffset);
std::optional<BOLTDWARF5AccelTableData *> NameEntry =
DebugNamesTable.addAccelTableEntry(
CU, Die, SkeletonCU ? SkeletonCU->getDWOId() : std::nullopt,
Parents.back());
NumberParentsInChain, Parent);
// It is possible that an indexed debugging information entry has a parent
// that is not indexed (for example, if its parent does not have a name
// attribute). In such a case, a parent attribute may point to a nameless
// index entry (that is, one that cannot be reached from any entry in the name
// table), or it may point to the nearest ancestor that does have an index
// entry.
// Skipping entry is not very useful for LLDB. This follows clang where
// children of forward declaration won't have DW_IDX_parent.
// https://github.com/llvm/llvm-project/pull/91808
// If Parent is nullopt and NumberParentsInChain is not zero, then forward
// declaration was encountered in this DF traversal. Propagating nullopt for
// Parent to children.
if (!Parent && NumberParentsInChain)
NameEntry = std::nullopt;
if (NameEntry)
Parents.push_back(std::move(NameEntry));
++NumberParentsInChain;
for (DIEValue &Val : Die.values())
CurSize += Val.sizeOf(CU.getFormParams());
CurSize += getULEB128Size(Die.getAbbrevNumber());
CurOffset += CurSize;
for (DIE &Child : Die.children()) {
uint32_t ChildSize = finalizeDIEs(CU, Child, Parents, CurOffset);
uint32_t ChildSize =
finalizeDIEs(CU, Child, NameEntry, NumberParentsInChain, CurOffset);
CurSize += ChildSize;
}
// for children end mark.
@ -496,9 +506,6 @@ uint32_t DIEBuilder::finalizeDIEs(
}
Die.setSize(CurSize);
if (NameEntry)
Parents.pop_back();
return CurSize;
}
@ -510,7 +517,7 @@ void DIEBuilder::finish() {
DebugNamesTable.setCurrentUnit(CU, UnitStartOffset);
std::vector<std::optional<BOLTDWARF5AccelTableData *>> Parents;
Parents.push_back(std::nullopt);
finalizeDIEs(CU, *UnitDIE, Parents, CurOffset);
finalizeDIEs(CU, *UnitDIE, std::nullopt, 0, CurOffset);
DWARFUnitInfo &CurUnitInfo = getUnitInfoByDwarfUnit(CU);
CurUnitInfo.UnitOffset = UnitStartOffset;

11
bolt/lib/Core/DebugNames.cpp
View File

@ -220,6 +220,7 @@ static uint64_t getEntryID(const BOLTDWARF5AccelTableData &Entry) {
std::optional<BOLTDWARF5AccelTableData *>
DWARF5AcceleratorTable::addAccelTableEntry(
DWARFUnit &Unit, const DIE &Die, const std::optional<uint64_t> &DWOID,
const uint32_t NumberParentsInChain,
std::optional<BOLTDWARF5AccelTableData *> &Parent) {
if (Unit.getVersion() < 5 || !NeedToCreate)
return std::nullopt;
@ -312,8 +313,14 @@ DWARF5AcceleratorTable::addAccelTableEntry(
// Keeping memory footprint down.
if (ParentOffset)
EntryRelativeOffsets.insert({*ParentOffset, 0});
bool IsParentRoot = false;
// If there is no parent and no valid Entries in parent chain this is a root
// to be marked with a flag.
if (!Parent && !NumberParentsInChain)
IsParentRoot = true;
It.Values.push_back(new (Allocator) BOLTDWARF5AccelTableData(
Die.getOffset(), ParentOffset, DieTag, UnitID, IsTU, SecondIndex));
Die.getOffset(), ParentOffset, DieTag, UnitID, IsParentRoot, IsTU,
SecondIndex));
return It.Values.back();
};
@ -462,7 +469,7 @@ void DWARF5AcceleratorTable::populateAbbrevsMap() {
Abbrev.addAttribute({dwarf::DW_IDX_die_offset, dwarf::DW_FORM_ref4});
if (std::optional<uint64_t> Offset = Value->getParentDieOffset())
Abbrev.addAttribute({dwarf::DW_IDX_parent, dwarf::DW_FORM_ref4});
else
else if (Value->isParentRoot())
Abbrev.addAttribute(
{dwarf::DW_IDX_parent, dwarf::DW_FORM_flag_present});
FoldingSetNodeID ID;

708
bolt/test/X86/dwarf5-debug-names-skip-forward-decl.s Normal file
View File

@ -0,0 +1,708 @@
# 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 --debug-names %t.bolt FileCheck --check-prefix=POSTCHECK %s
## This test checks that BOLT doesn't set DW_IDX_parent an entry, InnerState, when it's parent is a forward declaration.
# POSTCHECK: debug_names
# POSTCHECK: Bucket 0 [
# POSTCHECK-NEXT: Name 1 {
# POSTCHECK-NEXT: Hash: 0xB888030
# POSTCHECK-NEXT: String: 0x00000047 "int"
# POSTCHECK-NEXT: Entry @ 0xfb {
# POSTCHECK-NEXT: Abbrev: 0x1
# POSTCHECK-NEXT: Tag: DW_TAG_base_type
# POSTCHECK-NEXT: DW_IDX_die_offset: 0x0000005c
# POSTCHECK-NEXT: DW_IDX_parent: <parent not indexed>
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: ]
# POSTCHECK-NEXT: Bucket 1 [
# POSTCHECK-NEXT: EMPTY
# POSTCHECK-NEXT: ]
# POSTCHECK-NEXT: Bucket 2 [
# POSTCHECK-NEXT: Name 2 {
# POSTCHECK-NEXT: Hash: 0x7C9A7F6A
# POSTCHECK-NEXT: String: {{.+}} "main"
# POSTCHECK-NEXT: Entry @ {{.+}} {
# POSTCHECK-NEXT: Abbrev: 0x2
# POSTCHECK-NEXT: Tag: DW_TAG_subprogram
# POSTCHECK-NEXT: DW_IDX_die_offset: 0x00000034
# POSTCHECK-NEXT: DW_IDX_parent: <parent not indexed>
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: Name 3 {
# POSTCHECK-NEXT: Hash: 0xE0CDC6A2
# POSTCHECK-NEXT: String: {{.+}} "InnerState"
# POSTCHECK-NEXT: Entry @ {{.+}} {
# POSTCHECK-NEXT: Abbrev: 0x3
# POSTCHECK-NEXT: Tag: DW_TAG_class_type
# POSTCHECK-NEXT: DW_IDX_type_unit: 0x01
# POSTCHECK-NEXT: DW_IDX_die_offset: 0x00000030
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: ]
# POSTCHECK-NEXT: Bucket 3 [
# POSTCHECK-NEXT: EMPTY
# POSTCHECK-NEXT: ]
# POSTCHECK-NEXT: Bucket 4 [
# POSTCHECK-NEXT: EMPTY
# POSTCHECK-NEXT: ]
# POSTCHECK-NEXT: Bucket 5 [
# POSTCHECK-NEXT: Name 4 {
# POSTCHECK-NEXT: Hash: 0x2F94396D
# POSTCHECK-NEXT: String: {{.+}} "_Z9get_statev"
# POSTCHECK-NEXT: Entry @ {{.+}} {
# POSTCHECK-NEXT: Abbrev: 0x2
# POSTCHECK-NEXT: Tag: DW_TAG_subprogram
# POSTCHECK-NEXT: DW_IDX_die_offset: 0x00000024
# POSTCHECK-NEXT: DW_IDX_parent: <parent not indexed>
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: Name 5 {
# POSTCHECK-NEXT: Hash: 0xCD86E3E5
# POSTCHECK-NEXT: String: {{.+}} "get_state"
# POSTCHECK-NEXT: Entry @ {{.+}} {
# POSTCHECK-NEXT: Abbrev: 0x2
# POSTCHECK-NEXT: Tag: DW_TAG_subprogram
# POSTCHECK-NEXT: DW_IDX_die_offset: 0x00000024
# POSTCHECK-NEXT: DW_IDX_parent: <parent not indexed>
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: ]
# POSTCHECK-NEXT: Bucket 6 [
# POSTCHECK-NEXT: Name 6 {
# POSTCHECK-NEXT: Hash: 0x2B606
# POSTCHECK-NEXT: String: {{.+}} "A"
# POSTCHECK-NEXT: Entry @ 0x11a {
# POSTCHECK-NEXT: Abbrev: 0x4
# POSTCHECK-NEXT: Tag: DW_TAG_namespace
# POSTCHECK-NEXT: DW_IDX_type_unit: 0x00
# POSTCHECK-NEXT: DW_IDX_die_offset: 0x00000023
# POSTCHECK-NEXT: DW_IDX_parent: <parent not indexed>
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: Entry @ 0x120 {
# POSTCHECK-NEXT: Abbrev: 0x4
# POSTCHECK-NEXT: Tag: DW_TAG_namespace
# POSTCHECK-NEXT: DW_IDX_type_unit: 0x01
# POSTCHECK-NEXT: DW_IDX_die_offset: 0x00000023
# POSTCHECK-NEXT: DW_IDX_parent: <parent not indexed>
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: Entry @ 0x126 {
# POSTCHECK-NEXT: Abbrev: 0x5
# POSTCHECK-NEXT: Tag: DW_TAG_namespace
# POSTCHECK-NEXT: DW_IDX_die_offset: 0x00000043
# POSTCHECK-NEXT: DW_IDX_parent: <parent not indexed>
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: Name 7 {
# POSTCHECK-NEXT: Hash: 0x10614A06
# POSTCHECK-NEXT: String: {{.+}} "State"
# POSTCHECK-NEXT: Entry @ {{.+}} {
# POSTCHECK-NEXT: Abbrev: 0x6
# POSTCHECK-NEXT: Tag: DW_TAG_structure_type
# POSTCHECK-NEXT: DW_IDX_type_unit: 0x00
# POSTCHECK-NEXT: DW_IDX_die_offset: 0x00000027
# POSTCHECK-NEXT: DW_IDX_parent: Entry @ 0x137
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: ]
# POSTCHECK-NEXT: Bucket 7 [
# POSTCHECK-NEXT: Name 8 {
# POSTCHECK-NEXT: Hash: 0x2B607
# POSTCHECK-NEXT: String: {{.+}} "B"
# POSTCHECK-NEXT: Entry @ 0x137 {
# POSTCHECK-NEXT: Abbrev: 0x7
# POSTCHECK-NEXT: Tag: DW_TAG_namespace
# POSTCHECK-NEXT: DW_IDX_type_unit: 0x00
# POSTCHECK-NEXT: DW_IDX_die_offset: 0x00000025
# POSTCHECK-NEXT: DW_IDX_parent: Entry @ 0x11a
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: Entry @ {{.+}} {
# POSTCHECK-NEXT: Abbrev: 0x7
# POSTCHECK-NEXT: Tag: DW_TAG_namespace
# POSTCHECK-NEXT: DW_IDX_type_unit: 0x01
# POSTCHECK-NEXT: DW_IDX_die_offset: 0x00000025
# POSTCHECK-NEXT: DW_IDX_parent: Entry @ 0x120
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: Entry @ {{.+}} {
# POSTCHECK-NEXT: Abbrev: 0x8
# POSTCHECK-NEXT: Tag: DW_TAG_namespace
# POSTCHECK-NEXT: DW_IDX_die_offset: 0x00000045
# POSTCHECK-NEXT: DW_IDX_parent: Entry @ 0x126
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: }
# POSTCHECK-NEXT: ]
# POSTCHECK-NEXT: }
## clang++ -g2 -O0 -fdebug-types-section -gpubnames -S
## A::B::State::InnerState get_state() { return A::B::State::InnerState(); }
## int main() {
## return 0;
## }
## Manually modified to fix bug in clang where for TU0 "B" was pointing to CU DIE instead of parent in TU
.text
.file "main.cpp"
.globl _Z9get_statev # -- Begin function _Z9get_statev
.p2align 4, 0x90
.type _Z9get_statev,@function
_Z9get_statev: # @_Z9get_statev
.Lfunc_begin0:
.file 0 "/skipDecl" "main.cpp" md5 0xd417b4a09217d7c3ec58d64286de7ba4
.loc 0 2 0 # main.cpp:2:0
.cfi_startproc
# %bb.0: # %entry
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset %rbp, -16
movq %rsp, %rbp
.cfi_def_cfa_register %rbp
.Ltmp0:
.loc 0 2 39 prologue_end epilogue_begin # main.cpp:2:39
popq %rbp
.cfi_def_cfa %rsp, 8
retq
.Ltmp1:
.Lfunc_end0:
.size _Z9get_statev, .Lfunc_end0-_Z9get_statev
.cfi_endproc
# -- End function
.globl main # -- Begin function main
.p2align 4, 0x90
.type main,@function
main: # @main
.Lfunc_begin1:
.loc 0 4 0 # main.cpp:4:0
.cfi_startproc
# %bb.0: # %entry
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset %rbp, -16
movq %rsp, %rbp
.cfi_def_cfa_register %rbp
movl $0, -4(%rbp)
.Ltmp2:
.loc 0 5 3 prologue_end # main.cpp:5:3
xorl %eax, %eax
.loc 0 5 3 epilogue_begin is_stmt 0 # main.cpp:5:3
popq %rbp
.cfi_def_cfa %rsp, 8
retq
.Ltmp3:
.Lfunc_end1:
.size main, .Lfunc_end1-main
.cfi_endproc
# -- End function
.section .debug_info,"G",@progbits,16664150534606561860,comdat
.Ltu_begin0:
.long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
.Ldebug_info_start0:
.short 5 # DWARF version number
.byte 2 # DWARF Unit Type
.byte 8 # Address Size (in bytes)
.long .debug_abbrev # Offset Into Abbrev. Section
.quad -1782593539102989756 # Type Signature
.long 39 # Type DIE Offset
.byte 1 # Abbrev [1] 0x18:0x18 DW_TAG_type_unit
.short 33 # DW_AT_language
.long .Lline_table_start0 # DW_AT_stmt_list
.long .Lstr_offsets_base0 # DW_AT_str_offsets_base
.byte 2 # Abbrev [2] 0x23:0xc DW_TAG_namespace
.byte 5 # DW_AT_name
.byte 2 # Abbrev [2] 0x25:0x9 DW_TAG_namespace
.byte 6 # DW_AT_name
.byte 3 # Abbrev [3] 0x27:0x6 DW_TAG_structure_type
.byte 5 # DW_AT_calling_convention
.byte 7 # DW_AT_name
.byte 1 # DW_AT_byte_size
.byte 0 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line
.byte 0 # End Of Children Mark
.byte 0 # End Of Children Mark
.byte 0 # End Of Children Mark
.Ldebug_info_end0:
.section .debug_info,"G",@progbits,1766745463811827694,comdat
.Ltu_begin1:
.long .Ldebug_info_end1-.Ldebug_info_start1 # Length of Unit
.Ldebug_info_start1:
.short 5 # DWARF version number
.byte 2 # DWARF Unit Type
.byte 8 # Address Size (in bytes)
.long .debug_abbrev # Offset Into Abbrev. Section
.quad 1766745463811827694 # Type Signature
.long 48 # Type DIE Offset
.byte 1 # Abbrev [1] 0x18:0x22 DW_TAG_type_unit
.short 33 # DW_AT_language
.long .Lline_table_start0 # DW_AT_stmt_list
.long .Lstr_offsets_base0 # DW_AT_str_offsets_base
.byte 2 # Abbrev [2] 0x23:0x16 DW_TAG_namespace
.byte 5 # DW_AT_name
.byte 2 # Abbrev [2] 0x25:0x13 DW_TAG_namespace
.byte 6 # DW_AT_name
.byte 4 # Abbrev [4] 0x27:0x10 DW_TAG_structure_type
# DW_AT_declaration
.quad -1782593539102989756 # DW_AT_signature
.byte 5 # Abbrev [5] 0x30:0x6 DW_TAG_class_type
.byte 5 # DW_AT_calling_convention
.byte 8 # DW_AT_name
.byte 1 # DW_AT_byte_size
.byte 0 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line
.byte 0 # End Of Children Mark
.byte 0 # End Of Children Mark
.byte 0 # End Of Children Mark
.byte 0 # End Of Children Mark
.Ldebug_info_end1:
.section .debug_abbrev,"",@progbits
.byte 1 # Abbreviation Code
.byte 65 # DW_TAG_type_unit
.byte 1 # DW_CHILDREN_yes
.byte 19 # DW_AT_language
.byte 5 # DW_FORM_data2
.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 0 # EOM(1)
.byte 0 # EOM(2)
.byte 2 # Abbreviation Code
.byte 57 # DW_TAG_namespace
.byte 1 # DW_CHILDREN_yes
.byte 3 # DW_AT_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 0 # DW_CHILDREN_no
.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 19 # DW_TAG_structure_type
.byte 1 # DW_CHILDREN_yes
.byte 60 # DW_AT_declaration
.byte 25 # DW_FORM_flag_present
.byte 105 # DW_AT_signature
.byte 32 # DW_FORM_ref_sig8
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 5 # Abbreviation Code
.byte 2 # DW_TAG_class_type
.byte 0 # DW_CHILDREN_no
.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 6 # 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 7 # 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 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 8 # 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 9 # Abbreviation Code
.byte 2 # DW_TAG_class_type
.byte 0 # DW_CHILDREN_no
.byte 60 # DW_AT_declaration
.byte 25 # DW_FORM_flag_present
.byte 105 # DW_AT_signature
.byte 32 # DW_FORM_ref_sig8
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 10 # 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_end2-.Ldebug_info_start2 # Length of Unit
.Ldebug_info_start2:
.short 5 # DWARF version number
.byte 1 # DWARF Unit Type
.byte 8 # Address Size (in bytes)
.long .debug_abbrev # Offset Into Abbrev. Section
.byte 6 # Abbrev [6] 0xc:0x54 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_end1-.Lfunc_begin0 # DW_AT_high_pc
.long .Laddr_table_base0 # DW_AT_addr_base
.byte 7 # Abbrev [7] 0x23:0x10 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_linkage_name
.byte 4 # DW_AT_name
.byte 0 # DW_AT_decl_file
.byte 2 # DW_AT_decl_line
.long 79 # DW_AT_type
# DW_AT_external
.byte 8 # Abbrev [8] 0x33:0xf DW_TAG_subprogram
.byte 1 # DW_AT_low_pc
.long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc
.byte 1 # DW_AT_frame_base
.byte 86
.byte 9 # DW_AT_name
.byte 0 # DW_AT_decl_file
.byte 4 # DW_AT_decl_line
.long 91 # DW_AT_type
# DW_AT_external
.byte 2 # Abbrev [2] 0x42:0x19 DW_TAG_namespace
.byte 5 # DW_AT_name
.byte 2 # Abbrev [2] 0x44:0x16 DW_TAG_namespace
.byte 6 # DW_AT_name
.byte 4 # Abbrev [4] 0x46:0x13 DW_TAG_structure_type
# DW_AT_declaration
.quad -1782593539102989756 # DW_AT_signature
.byte 9 # Abbrev [9] 0x4f:0x9 DW_TAG_class_type
# DW_AT_declaration
.quad 1766745463811827694 # DW_AT_signature
.byte 0 # End Of Children Mark
.byte 0 # End Of Children Mark
.byte 0 # End Of Children Mark
.byte 10 # Abbrev [10] 0x5b:0x4 DW_TAG_base_type
.byte 10 # DW_AT_name
.byte 5 # DW_AT_encoding
.byte 4 # DW_AT_byte_size
.byte 0 # End Of Children Mark
.Ldebug_info_end2:
.section .debug_str_offsets,"",@progbits
.long 48 # Length of String Offsets Set
.short 5
.short 0
.Lstr_offsets_base0:
.section .debug_str,"MS",@progbits,1
.Linfo_string0:
.asciz "clang version 19.0.0git" # string offset=0
.Linfo_string1:
.asciz "main.cpp" # string offset=24
.Linfo_string2:
.asciz "/skipDecl" # string offset=33
.Linfo_string3:
.asciz "get_state" # string offset=80
.Linfo_string4:
.asciz "_Z9get_statev" # string offset=90
.Linfo_string5:
.asciz "main" # string offset=104
.Linfo_string6:
.asciz "A" # string offset=109
.Linfo_string7:
.asciz "B" # string offset=111
.Linfo_string8:
.asciz "State" # string offset=113
.Linfo_string9:
.asciz "InnerState" # string offset=119
.Linfo_string10:
.asciz "int" # string offset=130
.section .debug_str_offsets,"",@progbits
.long .Linfo_string0
.long .Linfo_string1
.long .Linfo_string2
.long .Linfo_string4
.long .Linfo_string3
.long .Linfo_string6
.long .Linfo_string7
.long .Linfo_string8
.long .Linfo_string9
.long .Linfo_string5
.long .Linfo_string10
.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 .Lfunc_begin1
.Ldebug_addr_end0:
.section .debug_names,"",@progbits
.long .Lnames_end0-.Lnames_start0 # Header: unit length
.Lnames_start0:
.short 5 # Header: version
.short 0 # Header: padding
.long 1 # Header: compilation unit count
.long 2 # Header: local type unit count
.long 0 # Header: foreign type unit count
.long 8 # Header: bucket count
.long 8 # Header: name count
.long .Lnames_abbrev_end0-.Lnames_abbrev_start0 # Header: abbreviation table size
.long 8 # Header: augmentation string size
.ascii "LLVM0700" # Header: augmentation string
.long .Lcu_begin0 # Compilation unit 0
.long .Ltu_begin0 # Type unit 0
.long .Ltu_begin1 # Type unit 1
.long 1 # Bucket 0
.long 0 # Bucket 1
.long 2 # Bucket 2
.long 0 # Bucket 3
.long 0 # Bucket 4
.long 4 # Bucket 5
.long 6 # Bucket 6
.long 8 # Bucket 7
.long 193495088 # Hash in Bucket 0
.long 2090499946 # Hash in Bucket 2
.long -523385182 # Hash in Bucket 2
.long 798243181 # Hash in Bucket 5
.long -846797851 # Hash in Bucket 5
.long 177670 # Hash in Bucket 6
.long 274811398 # Hash in Bucket 6
.long 177671 # Hash in Bucket 7
.long .Linfo_string10 # String in Bucket 0: int
.long .Linfo_string5 # String in Bucket 2: main
.long .Linfo_string9 # String in Bucket 2: InnerState
.long .Linfo_string4 # String in Bucket 5: _Z9get_statev
.long .Linfo_string3 # String in Bucket 5: get_state
.long .Linfo_string6 # String in Bucket 6: A
.long .Linfo_string8 # String in Bucket 6: State
.long .Linfo_string7 # String in Bucket 7: B
.long .Lnames7-.Lnames_entries0 # Offset in Bucket 0
.long .Lnames2-.Lnames_entries0 # Offset in Bucket 2
.long .Lnames6-.Lnames_entries0 # Offset in Bucket 2
.long .Lnames1-.Lnames_entries0 # Offset in Bucket 5
.long .Lnames0-.Lnames_entries0 # Offset in Bucket 5
.long .Lnames3-.Lnames_entries0 # Offset in Bucket 6
.long .Lnames5-.Lnames_entries0 # Offset in Bucket 6
.long .Lnames4-.Lnames_entries0 # Offset in Bucket 7
.Lnames_abbrev_start0:
.byte 1 # Abbrev code
.byte 36 # DW_TAG_base_type
.byte 3 # DW_IDX_die_offset
.byte 19 # DW_FORM_ref4
.byte 4 # DW_IDX_parent
.byte 25 # DW_FORM_flag_present
.byte 0 # End of abbrev
.byte 0 # End of abbrev
.byte 2 # Abbrev code
.byte 46 # DW_TAG_subprogram
.byte 3 # DW_IDX_die_offset
.byte 19 # DW_FORM_ref4
.byte 4 # DW_IDX_parent
.byte 25 # DW_FORM_flag_present
.byte 0 # End of abbrev
.byte 0 # End of abbrev
.byte 3 # Abbrev code
.byte 2 # DW_TAG_class_type
.byte 2 # DW_IDX_type_unit
.byte 11 # DW_FORM_data1
.byte 3 # DW_IDX_die_offset
.byte 19 # DW_FORM_ref4
.byte 0 # End of abbrev
.byte 0 # End of abbrev
.byte 4 # Abbrev code
.byte 57 # DW_TAG_namespace
.byte 2 # DW_IDX_type_unit
.byte 11 # DW_FORM_data1
.byte 3 # DW_IDX_die_offset
.byte 19 # DW_FORM_ref4
.byte 4 # DW_IDX_parent
.byte 25 # DW_FORM_flag_present
.byte 0 # End of abbrev
.byte 0 # End of abbrev
.byte 5 # Abbrev code
.byte 57 # DW_TAG_namespace
.byte 3 # DW_IDX_die_offset
.byte 19 # DW_FORM_ref4
.byte 4 # DW_IDX_parent
.byte 25 # DW_FORM_flag_present
.byte 0 # End of abbrev
.byte 0 # End of abbrev
.byte 6 # Abbrev code
.byte 19 # DW_TAG_structure_type
.byte 2 # DW_IDX_type_unit
.byte 11 # DW_FORM_data1
.byte 3 # DW_IDX_die_offset
.byte 19 # DW_FORM_ref4
.byte 4 # DW_IDX_parent
.byte 19 # DW_FORM_ref4
.byte 0 # End of abbrev
.byte 0 # End of abbrev
.byte 7 # Abbrev code
.byte 57 # DW_TAG_namespace
.byte 2 # DW_IDX_type_unit
.byte 11 # DW_FORM_data1
.byte 3 # DW_IDX_die_offset
.byte 19 # DW_FORM_ref4
.byte 4 # DW_IDX_parent
.byte 19 # DW_FORM_ref4
.byte 0 # End of abbrev
.byte 0 # End of abbrev
.byte 8 # Abbrev code
.byte 57 # DW_TAG_namespace
.byte 3 # DW_IDX_die_offset
.byte 19 # DW_FORM_ref4
.byte 4 # DW_IDX_parent
.byte 19 # DW_FORM_ref4
.byte 0 # End of abbrev
.byte 0 # End of abbrev
.byte 0 # End of abbrev list
.Lnames_abbrev_end0:
.Lnames_entries0:
.Lnames7:
.L6:
.byte 1 # Abbreviation code
.long 91 # DW_IDX_die_offset
.byte 0 # DW_IDX_parent
# End of list: int
.Lnames2:
.L1:
.byte 2 # Abbreviation code
.long 51 # DW_IDX_die_offset
.byte 0 # DW_IDX_parent
# End of list: main
.Lnames6:
.L8:
.byte 3 # Abbreviation code
.byte 1 # DW_IDX_type_unit
.long 48 # DW_IDX_die_offset
.byte 0 # End of list: InnerState
.Lnames1:
.L4:
.byte 2 # Abbreviation code
.long 35 # DW_IDX_die_offset
.byte 0 # DW_IDX_parent
# End of list: _Z9get_statev
.Lnames0:
.byte 2 # Abbreviation code
.long 35 # DW_IDX_die_offset
.byte 0 # DW_IDX_parent
# End of list: get_state
.Lnames3:
.LmanualLabel:
.byte 4 # Abbreviation code
.byte 0 # DW_IDX_type_unit
.long 35 # DW_IDX_die_offset
.L3: # DW_IDX_parent
.byte 4 # Abbreviation code
.byte 1 # DW_IDX_type_unit
.long 35 # DW_IDX_die_offset
.L2: # DW_IDX_parent
.byte 5 # Abbreviation code
.long 66 # DW_IDX_die_offset
.byte 0 # DW_IDX_parent
# End of list: A
.Lnames5:
.L0:
.byte 6 # Abbreviation code
.byte 0 # DW_IDX_type_unit
.long 39 # DW_IDX_die_offset
.long .L5-.Lnames_entries0 # DW_IDX_parent
.byte 0 # End of list: State
.Lnames4:
.L5:
.byte 7 # Abbreviation code
.byte 0 # DW_IDX_type_unit
.long 37 # DW_IDX_die_offset
.long .LmanualLabel-.Lnames_entries0 # DW_IDX_parent
.L7:
.byte 7 # Abbreviation code
.byte 1 # DW_IDX_type_unit
.long 37 # DW_IDX_die_offset
.long .L3-.Lnames_entries0 # DW_IDX_parent
.L9:
.byte 8 # Abbreviation code
.long 68 # DW_IDX_die_offset
.long .L2-.Lnames_entries0 # DW_IDX_parent
.byte 0 # End of list: B
.p2align 2, 0x0
.Lnames_end0:
.ident "clang version 19.0.0git"
.section ".note.GNU-stack","",@progbits
.addrsig
.section .debug_line,"",@progbits
.Lline_table_start0: