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[BOLT][DWARF] Fix out of order rangelists/loclists (#81645)

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GCC can generate rangelists/loclists that are out of order. Fixed so
that we don't assert, and instead generate partially optimized list.
Through most code paths we do sort rnglists/loclists, but not for
loclist for a path where BOLT does not modify a function. Although it's
nice to have lists sorted, this implementation shouldn't rely on it.
This also fixes an issue if we partially capture a list we would write
out *end_of_list in helper function. So tools won't see the rest of the
addresses being written out.
This commit is contained in:
Alexander Yermolovich 2024-02-14 11:23:57 -08:00 committed by GitHub
parent 6297479ff0
commit c9e8e91aca
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
2 changed files with 504 additions and 26 deletions
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45
bolt/lib/Core/DebugData.cpp
View File

@ -230,7 +230,7 @@ template <typename DebugVector, typename ListEntry, typename DebugAddressEntry>
static bool emitWithBase(raw_ostream &OS, const DebugVector &Entries,
DebugAddrWriter &AddrWriter, DWARFUnit &CU,
uint32_t &Index, const ListEntry BaseAddressx,
const ListEntry OffsetPair, const ListEntry EndOfList,
const ListEntry OffsetPair,
const std::function<void(uint32_t)> &Func) {
if (Entries.size() < 2)
return false;
@ -241,7 +241,9 @@ static bool emitWithBase(raw_ostream &OS, const DebugVector &Entries,
const DebugAddressEntry &Entry = Entries[Index];
if (Entry.LowPC == 0)
break;
assert(Base <= Entry.LowPC && "Entry base is higher than low PC");
// In case rnglists or loclists are not sorted.
if (Base > Entry.LowPC)
break;
uint32_t StartOffset = Entry.LowPC - Base;
uint32_t EndOffset = Entry.HighPC - Base;
if (encodeULEB128(EndOffset, TempBuffer) > 2)
@ -266,8 +268,6 @@ static bool emitWithBase(raw_ostream &OS, const DebugVector &Entries,
encodeULEB128(OffsetEntry.EndOffset, OS);
Func(OffsetEntry.Index);
}
support::endian::write(OS, static_cast<uint8_t>(EndOfList),
llvm::endianness::little);
return true;
}
@ -276,19 +276,17 @@ DebugRangeListsSectionWriter::addRanges(DebugAddressRangesVector &Ranges) {
std::lock_guard<std::mutex> Lock(WriterMutex);
RangeEntries.push_back(CurrentOffset);
bool WrittenStartxLength = false;
std::sort(
Ranges.begin(), Ranges.end(),
[](const DebugAddressRange &R1, const DebugAddressRange &R2) -> bool {
return R1.LowPC < R2.LowPC;
});
for (unsigned I = 0; I < Ranges.size();) {
WrittenStartxLength = false;
if (emitWithBase<DebugAddressRangesVector, dwarf::RnglistEntries,
DebugAddressRange>(
*CUBodyStream, Ranges, *AddrWriter, *CU, I,
dwarf::DW_RLE_base_addressx, dwarf::DW_RLE_offset_pair,
dwarf::DW_RLE_end_of_list, [](uint32_t Index) -> void {}))
DebugAddressRange>(*CUBodyStream, Ranges, *AddrWriter, *CU,
I, dwarf::DW_RLE_base_addressx,
dwarf::DW_RLE_offset_pair,
[](uint32_t Index) -> void {}))
continue;
const DebugAddressRange &Range = Ranges[I];
@ -299,12 +297,11 @@ DebugRangeListsSectionWriter::addRanges(DebugAddressRangesVector &Ranges) {
encodeULEB128(Index, *CUBodyStream);
encodeULEB128(Range.HighPC - Range.LowPC, *CUBodyStream);
++I;
WrittenStartxLength = true;
}
if (WrittenStartxLength)
support::endian::write(*CUBodyStream,
static_cast<uint8_t>(dwarf::DW_RLE_end_of_list),
llvm::endianness::little);
support::endian::write(*CUBodyStream,
static_cast<uint8_t>(dwarf::DW_RLE_end_of_list),
llvm::endianness::little);
CurrentOffset = CUBodyBuffer->size();
return RangeEntries.size() - 1;
}
@ -688,7 +685,6 @@ static void writeDWARF5LocList(uint32_t &NumberOfEntries, DIEValue &AttrInfo,
}
std::vector<uint64_t> OffsetsArray;
bool WrittenStartxLength = false;
auto writeExpression = [&](uint32_t Index) -> void {
const DebugLocationEntry &Entry = LocList[Index];
encodeULEB128(Entry.Expr.size(), LocBodyStream);
@ -696,12 +692,11 @@ static void writeDWARF5LocList(uint32_t &NumberOfEntries, DIEValue &AttrInfo,
reinterpret_cast<const char *>(Entry.Expr.data()), Entry.Expr.size());
};
for (unsigned I = 0; I < LocList.size();) {
WrittenStartxLength = false;
if (emitWithBase<DebugLocationsVector, dwarf::LoclistEntries,
DebugLocationEntry>(
LocBodyStream, LocList, AddrWriter, CU, I,
dwarf::DW_LLE_base_addressx, dwarf::DW_LLE_offset_pair,
dwarf::DW_LLE_end_of_list, writeExpression))
DebugLocationEntry>(LocBodyStream, LocList, AddrWriter, CU,
I, dwarf::DW_LLE_base_addressx,
dwarf::DW_LLE_offset_pair,
writeExpression))
continue;
const DebugLocationEntry &Entry = LocList[I];
@ -713,13 +708,11 @@ static void writeDWARF5LocList(uint32_t &NumberOfEntries, DIEValue &AttrInfo,
encodeULEB128(Entry.HighPC - Entry.LowPC, LocBodyStream);
writeExpression(I);
++I;
WrittenStartxLength = true;
}
if (WrittenStartxLength)
support::endian::write(LocBodyStream,
static_cast<uint8_t>(dwarf::DW_LLE_end_of_list),
llvm::endianness::little);
support::endian::write(LocBodyStream,
static_cast<uint8_t>(dwarf::DW_LLE_end_of_list),
llvm::endianness::little);
}
void DebugLoclistWriter::addList(DIEBuilder &DIEBldr, DIE &Die,

485
bolt/test/X86/dwarf5-loclist-out-of-order.s Normal file
View File

@ -0,0 +1,485 @@
# 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 --skip-funcs=main
# RUN: llvm-dwarfdump --show-form --verbose --debug-loclists --debug-addr %t.bolt > %t.txt
# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.bolt >> %t.txt
# RUN: cat %t.txt | FileCheck --check-prefix=POSTCHECK %s
## Tests to make sure BOLT handles correctly locations that are out of order, and the function is not being processed.
# POSTCHECK: DW_LLE_base_addressx
# POSTCHECK-NEXT: DW_LLE_offset_pair
# POSTCHECK-NEXT: DW_LLE_offset_pair
# POSTCHECK-NEXT: DW_LLE_startx_length
# POSTCHECK-NEXT: DW_LLE_end_of_list
# POSTCHECK: DW_LLE_base_addressx
# POSTCHECK-NEXT: DW_LLE_offset_pair
# POSTCHECK-NEXT: DW_LLE_offset_pair
# POSTCHECK-NEXT: DW_LLE_end_of_list
# POSTCHECK: Addrs: [
# POSTCHECK-NEXT: 0x[[#%.16x,ADDR:]]
# POSTCHECK-NEXT: 0x
# POSTCHECK-NEXT: 0x
# POSTCHECK-NEXT: 0x[[#%.16x,ADDR1:]]
# POSTCHECK-NEXT: 0x
# POSTCHECK-NEXT: 0x
# POSTCHECK: DW_TAG_formal_parameter
# POSTCHECK: DW_TAG_formal_parameter
# POSTCHECK-NEXT: DW_AT_location
# POSTCHECK-NEXT: [0x[[#ADDR1]], 0x[[#ADDR1 + 0x1a]]): DW_OP_reg3 RBX
# POSTCHECK-NEXT: [0x[[#ADDR1 + 0x1a]], 0x[[#ADDR1 + 0x1d]]): DW_OP_entry_value(DW_OP_reg5 RDI), DW_OP_stack_value
# POSTCHECK-NEXT: [0x[[#ADDR]], 0x[[#ADDR + 0x12]]): DW_OP_reg5 RDI)
## clang++ main.cpp -fno-inline-functions -g2 -O2 -S
## void use(int * x) {
## *x += 4;
## }
## int main(int argc, char *argv[]) {
## int x = argc;
## use(&x);
## x = x + argc;
## use(&x);
## return x;
## }
## Test was manually modified to re-order locations.
.text
.file "main.cpp"
.globl _Z3usePi # -- Begin function _Z3usePi
.p2align 4, 0x90
.type _Z3usePi,@function
_Z3usePi: # @_Z3usePi
.Lfunc_begin0:
.file 0 "/repro" "main.cpp" md5 0xe24a1d6afb5e23ce0028f1f33bc08cd7
.cfi_startproc
# %bb.0: # %entry
#DEBUG_VALUE: use:x <- $rdi
.loc 0 2 8 prologue_end # main.cpp:2:8
addl $4, (%rdi)
.loc 0 3 1 # main.cpp:3:1
retq
.Ltmp0:
.Lfunc_end0:
.size _Z3usePi, .Lfunc_end0-_Z3usePi
.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
#DEBUG_VALUE: main:argc <- $edi
#DEBUG_VALUE: main:argv <- $rsi
pushq %r14
.cfi_def_cfa_offset 16
pushq %rbx
.cfi_def_cfa_offset 24
pushq %rax
.cfi_def_cfa_offset 32
.cfi_offset %rbx, -24
.cfi_offset %r14, -16
movl %edi, %ebx
.Ltmp1:
.loc 0 5 7 prologue_end # main.cpp:5:7
movl %edi, 4(%rsp)
leaq 4(%rsp), %r14
.loc 0 6 3 # main.cpp:6:3
movq %r14, %rdi
.Ltmp2:
#DEBUG_VALUE: main:argc <- $ebx
callq _Z3usePi
.Ltmp3:
#DEBUG_VALUE: main:argv <- [DW_OP_LLVM_entry_value 1] $rsi
.loc 0 7 5 # main.cpp:7:5
addl %ebx, 4(%rsp)
.loc 0 8 3 # main.cpp:8:3
movq %r14, %rdi
callq _Z3usePi
.Ltmp4:
.loc 0 9 10 # main.cpp:9:10
movl 4(%rsp), %eax
.loc 0 9 3 epilogue_begin is_stmt 0 # main.cpp:9:3
addq $8, %rsp
.cfi_def_cfa_offset 24
popq %rbx
.Ltmp5:
#DEBUG_VALUE: main:argc <- [DW_OP_LLVM_entry_value 1] $edi
.cfi_def_cfa_offset 16
popq %r14
.cfi_def_cfa_offset 8
retq
.Ltmp6:
.Lfunc_end1:
.size main, .Lfunc_end1-main
.cfi_endproc
# -- End function
.section .debug_loclists,"",@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 2 # Offset entry count
.Lloclists_table_base0:
.long .Ldebug_loc0-.Lloclists_table_base0
.long .Ldebug_loc1-.Lloclists_table_base0
.Ldebug_loc0:
.byte 4 # DW_LLE_offset_pair
.uleb128 .Ltmp2-.Lfunc_begin0 # starting offset
.uleb128 .Ltmp5-.Lfunc_begin0 # ending offset
.byte 1 # Loc expr size
.byte 83 # super-register DW_OP_reg3
.byte 4 # DW_LLE_offset_pair
.uleb128 .Ltmp5-.Lfunc_begin0 # starting offset
.uleb128 .Lfunc_end1-.Lfunc_begin0 # ending offset
.byte 4 # Loc expr size
.byte 163 # DW_OP_entry_value
.byte 1 # 1
.byte 85 # super-register DW_OP_reg5
.byte 159 # DW_OP_stack_value
.byte 4 # DW_LLE_offset_pair #manually moved out of order
.uleb128 .Lfunc_begin1-.Lfunc_begin0 # starting offset
.uleb128 .Ltmp2-.Lfunc_begin0 # ending offset
.byte 1 # Loc expr size
.byte 85 # super-register DW_OP_reg5
.byte 0 # DW_LLE_end_of_list
.Ldebug_loc1:
.byte 4 # DW_LLE_offset_pair
.uleb128 .Lfunc_begin1-.Lfunc_begin0 # starting offset
.uleb128 .Ltmp3-.Lfunc_begin0 # ending offset
.byte 1 # Loc expr size
.byte 84 # DW_OP_reg4
.byte 4 # DW_LLE_offset_pair
.uleb128 .Ltmp3-.Lfunc_begin0 # starting offset
.uleb128 .Lfunc_end1-.Lfunc_begin0 # ending offset
.byte 4 # Loc expr size
.byte 163 # DW_OP_entry_value
.byte 1 # 1
.byte 84 # DW_OP_reg4
.byte 159 # DW_OP_stack_value
.byte 0 # DW_LLE_end_of_list
.Ldebug_list_header_end0:
.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
.ascii "\214\001" # DW_AT_loclists_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 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 3 # 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 4 # 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 5 # Abbreviation Code
.byte 5 # DW_TAG_formal_parameter
.byte 0 # DW_CHILDREN_no
.byte 2 # DW_AT_location
.byte 34 # DW_FORM_loclistx
.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 6 # Abbreviation Code
.byte 52 # DW_TAG_variable
.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 72 # DW_TAG_call_site
.byte 1 # DW_CHILDREN_yes
.byte 127 # DW_AT_call_origin
.byte 19 # DW_FORM_ref4
.byte 125 # DW_AT_call_return_pc
.byte 27 # DW_FORM_addrx
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 8 # Abbreviation Code
.byte 73 # DW_TAG_call_site_parameter
.byte 0 # DW_CHILDREN_no
.byte 2 # DW_AT_location
.byte 24 # DW_FORM_exprloc
.byte 126 # DW_AT_call_value
.byte 24 # DW_FORM_exprloc
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 9 # 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 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_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:0x91 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
.long .Lloclists_table_base0 # DW_AT_loclists_base
.byte 2 # Abbrev [2] 0x27:0x17 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 3 # DW_AT_linkage_name
.byte 4 # DW_AT_name
.byte 0 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line
# DW_AT_external
.byte 3 # Abbrev [3] 0x33:0xa DW_TAG_formal_parameter
.byte 1 # DW_AT_location
.byte 85
.byte 7 # DW_AT_name
.byte 0 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line
.long 137 # DW_AT_type
.byte 0 # End Of Children Mark
.byte 4 # Abbrev [4] 0x3e:0x47 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 87
# DW_AT_call_all_calls
.byte 5 # DW_AT_name
.byte 0 # DW_AT_decl_file
.byte 4 # DW_AT_decl_line
.long 133 # DW_AT_type
# DW_AT_external
.byte 5 # Abbrev [5] 0x4d:0x9 DW_TAG_formal_parameter
.byte 0 # DW_AT_location
.byte 8 # DW_AT_name
.byte 0 # DW_AT_decl_file
.byte 4 # DW_AT_decl_line
.long 133 # DW_AT_type
.byte 5 # Abbrev [5] 0x56:0x9 DW_TAG_formal_parameter
.byte 1 # DW_AT_location
.byte 9 # DW_AT_name
.byte 0 # DW_AT_decl_file
.byte 4 # DW_AT_decl_line
.long 142 # DW_AT_type
.byte 6 # Abbrev [6] 0x5f:0xb DW_TAG_variable
.byte 2 # DW_AT_location
.byte 145
.byte 4
.byte 7 # DW_AT_name
.byte 0 # DW_AT_decl_file
.byte 5 # DW_AT_decl_line
.long 133 # DW_AT_type
.byte 7 # Abbrev [7] 0x6a:0xd DW_TAG_call_site
.long 39 # DW_AT_call_origin
.byte 2 # DW_AT_call_return_pc
.byte 8 # Abbrev [8] 0x70:0x6 DW_TAG_call_site_parameter
.byte 1 # DW_AT_location
.byte 85
.byte 2 # DW_AT_call_value
.byte 126
.byte 0
.byte 0 # End Of Children Mark
.byte 7 # Abbrev [7] 0x77:0xd DW_TAG_call_site
.long 39 # DW_AT_call_origin
.byte 3 # DW_AT_call_return_pc
.byte 8 # Abbrev [8] 0x7d:0x6 DW_TAG_call_site_parameter
.byte 1 # DW_AT_location
.byte 85
.byte 2 # DW_AT_call_value
.byte 126
.byte 0
.byte 0 # End Of Children Mark
.byte 0 # End Of Children Mark
.byte 9 # Abbrev [9] 0x85:0x4 DW_TAG_base_type
.byte 6 # DW_AT_name
.byte 5 # DW_AT_encoding
.byte 4 # DW_AT_byte_size
.byte 10 # Abbrev [10] 0x89:0x5 DW_TAG_pointer_type
.long 133 # DW_AT_type
.byte 10 # Abbrev [10] 0x8e:0x5 DW_TAG_pointer_type
.long 147 # DW_AT_type
.byte 10 # Abbrev [10] 0x93:0x5 DW_TAG_pointer_type
.long 152 # DW_AT_type
.byte 9 # Abbrev [9] 0x98:0x4 DW_TAG_base_type
.byte 10 # DW_AT_name
.byte 6 # DW_AT_encoding
.byte 1 # DW_AT_byte_size
.byte 0 # End Of Children Mark
.Ldebug_info_end0:
.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 (git@github.com:ayermolo/llvm-project.git a1e412af2bf4bf613021f72205f249ab2469f08b)" # string offset=0
.Linfo_string1:
.asciz "main.cpp" # string offset=108
.Linfo_string2:
.asciz "/repro" # string offset=117
.Linfo_string3:
.asciz "_Z3usePi" # string offset=161
.Linfo_string4:
.asciz "use" # string offset=170
.Linfo_string5:
.asciz "main" # string offset=174
.Linfo_string6:
.asciz "int" # string offset=179
.Linfo_string7:
.asciz "x" # string offset=183
.Linfo_string8:
.asciz "argc" # string offset=185
.Linfo_string9:
.asciz "argv" # string offset=190
.Linfo_string10:
.asciz "char" # string offset=195
.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
.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
.quad .Ltmp3
.quad .Ltmp4
.Ldebug_addr_end0:
.ident "clang version 19.0.0git (git@github.com:ayermolo/llvm-project.git a1e412af2bf4bf613021f72205f249ab2469f08b)"
.section ".note.GNU-stack","",@progbits
.addrsig
.section .debug_line,"",@progbits
.Lline_table_start0: