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Differential D132782

[BOLT][DWARF] Fix for Handle zero size DW_TAG_inlined_subroutine
ClosedPublic

Authored by ayermolo on Aug 26 2022, 9:54 PM.

Details

Reviewers
rafauler
Amir
maksfb
Group Reviewers
Restricted Project
Commits
rG2afc90a2de37: [BOLT][DWARF] Fix for Handle zero size DW_TAG_inlined_subroutine
Summary

Managed to introduce an error when changing code to fix other tests and the unit
test was no adequate due to --nostdlib being passed in in llvm testing
enviroment.
Original diff: https://reviews.llvm.org/D132059

Updated a test to make sure that original address and the new address are
different.

Diff Detail

Event Timeline

ayermolo created this revision.Aug 26 2022, 9:54 PM
Herald added a reviewer: rafauler. · View Herald TranscriptAug 26 2022, 9:54 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.Aug 26 2022, 9:54 PM
Herald added a project: Restricted Project. · View Herald TranscriptAug 26 2022, 9:54 PM
Herald added subscribers: llvm-commits, yota9. · View Herald Transcript
ayermolo edited the summary of this revision. (Show Details)Aug 26 2022, 9:55 PM
ayermolo added a reviewer: Restricted Project.
Harbormaster completed remote builds in B183724: Diff 456081.Aug 26 2022, 10:02 PM
ayermolo retitled this revision from [BOLT][DWARF][NFC] Fix for Handle zero size DW_TAG_inlined_subroutine to [BOLT][DWARF] Fix for Handle zero size DW_TAG_inlined_subroutine.Dec 13 2022, 3:39 PM
maksfb accepted this revision.Dec 13 2022, 3:39 PM

Remove "NFC" before commit.

bolt/lib/Rewrite/DWARFRewriter.cpp
467
This revision is now accepted and ready to land.Dec 13 2022, 3:39 PM
ayermolo updated this revision to Diff 482653.Dec 13 2022, 4:05 PM

rebase + address comments

ayermolo marked an inline comment as done.Dec 13 2022, 4:06 PM
Harbormaster completed remote builds in B202971: Diff 482653.Dec 13 2022, 4:12 PM
Closed by commit rG2afc90a2de37: [BOLT][DWARF] Fix for Handle zero size DW_TAG_inlined_subroutine (authored by ayermolo). · Explain WhyDec 14 2022, 9:03 AM
This revision was automatically updated to reflect the committed changes.
ayermolo added a commit: rG2afc90a2de37: [BOLT][DWARF] Fix for Handle zero size DW_TAG_inlined_subroutine.

Revision Contents

PathSize
bolt/
lib/
Rewrite/
13 lines
test/
X86/
356 lines

Diff 482883

bolt/lib/Rewrite/DWARFRewriter.cpp

Show First 20 Lines • Show All 457 Lines • ▼ Show 20 Lines while (
case dwarf::DW_TAG_catch_block: { case dwarf::DW_TAG_catch_block: {
uint64_t RangesSectionOffset = RangesSectionWriter.getEmptyRangesOffset(); uint64_t RangesSectionOffset = RangesSectionWriter.getEmptyRangesOffset();
Expected<DWARFAddressRangesVector> RangesOrError = DIE.getAddressRanges(); Expected<DWARFAddressRangesVector> RangesOrError = DIE.getAddressRanges();
const BinaryFunction *Function = const BinaryFunction *Function =
RangesOrError && !RangesOrError->empty() RangesOrError && !RangesOrError->empty()
? BC.getBinaryFunctionContainingAddress( ? BC.getBinaryFunctionContainingAddress(
RangesOrError->front().LowPC) RangesOrError->front().LowPC)
: nullptr; : nullptr;
DebugAddressRangesVector OutputRanges;
bool ErrorState = false; bool ErrorState = false;
std::optional<uint64_t> NewLowPC;
maksfbUnsubmitted
Done
ReplyInline Actions
bool ErrorState = false;
- Optional<uint64_t> NewLowPC;
+ std::optional<uint64_t> NewLowPC;
if (Function) {
maksfb:
if (Function) { if (Function) {
OutputRanges = Function->translateInputToOutputRanges(*RangesOrError); DebugAddressRangesVector OutputRanges =
Function->translateInputToOutputRanges(*RangesOrError);
LLVM_DEBUG(if (OutputRanges.empty() != RangesOrError->empty()) { LLVM_DEBUG(if (OutputRanges.empty() != RangesOrError->empty()) {
dbgs() << "BOLT-DEBUG: problem with DIE at 0x" dbgs() << "BOLT-DEBUG: problem with DIE at 0x"
<< Twine::utohexstr(DIE.getOffset()) << " in CU at 0x" << Twine::utohexstr(DIE.getOffset()) << " in CU at 0x"
<< Twine::utohexstr(Unit.getOffset()) << '\n'; << Twine::utohexstr(Unit.getOffset()) << '\n';
}); });
if (!OutputRanges.empty())
NewLowPC = OutputRanges.front().LowPC;
RangesSectionOffset = RangesSectionWriter.addRanges( RangesSectionOffset = RangesSectionWriter.addRanges(
std::move(OutputRanges), CachedRanges); std::move(OutputRanges), CachedRanges);
} else if (!RangesOrError) { } else if (!RangesOrError) {
ErrorState = true; ErrorState = true;
consumeError(RangesOrError.takeError()); consumeError(RangesOrError.takeError());
} }
uint64_t LowPCToUse = 0; uint64_t LowPCToUse = 0;
if (!ErrorState && RangesOrError.get().size() == 1 && if (!ErrorState && RangesOrError.get().size() == 1 &&
RangesOrError.get().begin()->LowPC == RangesOrError.get().begin()->LowPC ==
RangesOrError.get().begin()->HighPC) { RangesOrError.get().begin()->HighPC) {
if (!OutputRanges.empty()) if (NewLowPC)
LowPCToUse = OutputRanges.front().LowPC; LowPCToUse = NewLowPC.value();
else else
LowPCToUse = RangesOrError.get().begin()->LowPC; LowPCToUse = RangesOrError.get().begin()->LowPC;
} }
updateDWARFObjectAddressRanges(DIE, RangesSectionOffset, DebugInfoPatcher, updateDWARFObjectAddressRanges(DIE, RangesSectionOffset, DebugInfoPatcher,
AbbrevWriter, LowPCToUse); AbbrevWriter, LowPCToUse);
break; break;
} }
▲ Show 20 Lines • Show All 1,449 Lines • Show Last 20 Lines

bolt/test/X86/dwarf4-size-0-inlined_subroutine.s

# REQUIRES: system-linux # REQUIRES: system-linux
# RUN: llvm-mc -dwarf-version=4 -filetype=obj -triple x86_64-unknown-linux %s -o %tmain.o # RUN: llvm-mc -dwarf-version=4 -filetype=obj -triple x86_64-unknown-linux %s -o %tmain.o
# RUN: %clang %cflags -dwarf-5 %tmain.o -o %t.exe -Wl,-q # RUN: %clang %cflags -dwarf-4 %tmain.o -o %t.exe -Wl,-q
# RUN: llvm-bolt %t.exe -o %t.bolt --update-debug-sections # RUN: llvm-bolt %t.exe -o %t.bolt --update-debug-sections --use-old-text
# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.bolt | FileCheck --check-prefix=CHECK %s # RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.bolt > %t.txt
# RUN: llvm-dwarfdump --show-form --verbose --debug-info %t.exe >> %t.txt
# RUN: cat %t.txt | FileCheck --check-prefix=CHECK %s
# CHECK: DW_TAG_inlined_subroutine # CHECK: DW_TAG_inlined_subroutine
# CHECK: DW_AT_low_pc [DW_FORM_addr] (0x[[#%.16x,ADDR:]]) # CHECK: DW_AT_low_pc [DW_FORM_addr] (0x[[#%.16x,ADDR:]])
# CHECK: DW_AT_ranges [DW_FORM_sec_offset] # CHECK: DW_AT_ranges [DW_FORM_sec_offset]
# CHECK-NEXT: [0x[[#ADDR]], 0x[[#ADDR]]) # CHECK-NEXT: [0x[[#ADDR]], 0x[[#ADDR]])
# CHECK: DW_TAG_inlined_subroutine
# CHECK-NOT: DW_AT_low_pc [DW_FORM_addr] (0x[[#ADDR]])
# Testing BOLT handles correctly when size of DW_AT_inlined_subroutine is 0. # Testing BOLT handles correctly when size of DW_AT_inlined_subroutine is 0.
# In other words DW_AT_high_pc is 0 or DW_AT_low_pc == DW_AT_high_pc. # In other words DW_AT_high_pc is 0 or DW_AT_low_pc == DW_AT_high_pc.
# Modified assembly manually to set DW_AT_high_pc to 0. # Modified assembly manually to set DW_AT_high_pc to 0.
# clang++ -g2 -gdwarf-4 main.cpp -O1 -S -o main4.s
# static int helper(int i) { # static int helper(int i) {
# return ++i; # return ++i;
# } # }
# # void may_not_exist(void) __attribute__ ((weak));
# int main(int argc, char *argv[]) { # int main(int argc, char *argv[]) {
# return helper(argc); # if (may_not_exist)
# may_not_exist();
# int j = 0;
# [[clang::always_inline]] j = helper(argc);
# return j;
# } # }
.text .text
.file "main.cpp" .file "main.cpp"
.globl _Z6helperi # -- Begin function _Z6helperi
.p2align 4, 0x90
.type _Z6helperi,@function
_Z6helperi: # @_Z6helperi
.Lfunc_begin0:
.file 1 "." "main.cpp"
.loc 1 1 0 # main.cpp:1:0
.cfi_startproc
# %bb.0: # %entry
#DEBUG_VALUE: helper:i <- $edi
# kill: def $edi killed $edi def $rdi
.loc 1 2 10 prologue_end # main.cpp:2:10
leal 1(%rdi), %eax
.Ltmp0:
#DEBUG_VALUE: helper:i <- $eax
.loc 1 2 3 is_stmt 0 # main.cpp:2:3
retq
.Ltmp1:
.Lfunc_end0:
.size _Z6helperi, .Lfunc_end0-_Z6helperi
.cfi_endproc
# -- End function
.globl main # -- Begin function main .globl main # -- Begin function main
.p2align 4, 0x90 .p2align 4, 0x90
.type main,@function .type main,@function
main: # @main main: # @main
.Lfunc_begin1: .Lfunc_begin0:
.loc 1 5 0 is_stmt 1 # main.cpp:5:0 .file 1 "." "main.cpp"
.loc 1 5 0 # main.cpp:5:0
.cfi_startproc .cfi_startproc
# %bb.0: # %entry # %bb.0: # %entry
#DEBUG_VALUE: main:argc <- $edi #DEBUG_VALUE: main:argc <- $edi
#DEBUG_VALUE: main:argv <- $rsi #DEBUG_VALUE: main:argv <- $rsi
#DEBUG_VALUE: helper:i <- $edi pushq %rbx
# kill: def $edi killed $edi def $rdi .cfi_def_cfa_offset 16
.loc 1 2 10 prologue_end # main.cpp:2:10 .cfi_offset %rbx, -16
leal 1(%rdi), %eax movl %edi, %ebx
.Ltmp0:
.loc 1 6 7 prologue_end # main.cpp:6:7
cmpq $0, _Z13may_not_existv@GOTPCREL(%rip)
je .LBB0_2
.Ltmp1:
# %bb.1: # %if.then
#DEBUG_VALUE: main:argc <- $ebx
#DEBUG_VALUE: main:argv <- $rsi
.loc 1 7 5 # main.cpp:7:5
callq _Z13may_not_existv@PLT
.Ltmp2: .Ltmp2:
#DEBUG_VALUE: main:argv <- [DW_OP_LLVM_entry_value 1] $rsi
.LBB0_2: # %if.end
#DEBUG_VALUE: main:argc <- $ebx
#DEBUG_VALUE: main:argv <- [DW_OP_LLVM_entry_value 1] $rsi
#DEBUG_VALUE: main:j <- 0
#DEBUG_VALUE: helper:i <- $ebx
.loc 1 2 10 # main.cpp:2:10
incl %ebx
.Ltmp3:
#DEBUG_VALUE: main:argc <- [DW_OP_LLVM_entry_value 1] $edi
#DEBUG_VALUE: helper:i <- $ebx
#DEBUG_VALUE: main:j <- $ebx
.loc 1 10 3 # main.cpp:10:3
movl %ebx, %eax
popq %rbx
.Ltmp4:
#DEBUG_VALUE: helper:i <- $eax #DEBUG_VALUE: helper:i <- $eax
.loc 1 6 3 # main.cpp:6:3 #DEBUG_VALUE: main:j <- $eax
.cfi_def_cfa_offset 8
retq retq
.Ltmp3: .Ltmp5:
.Lfunc_end1: .Lfunc_end0:
.size main, .Lfunc_end1-main .size main, .Lfunc_end0-main
.cfi_endproc .cfi_endproc
# -- End function # -- End function
.section .debug_loc,"",@progbits .section .debug_loc,"",@progbits
.Ldebug_loc0: .Ldebug_loc0:
.quad .Lfunc_begin0-.Lfunc_begin0 .quad .Lfunc_begin0-.Lfunc_begin0
.quad .Ltmp0-.Lfunc_begin0 .quad .Ltmp1-.Lfunc_begin0
.short 1 # Loc expr size .short 1 # Loc expr size
.byte 85 # super-register DW_OP_reg5 .byte 85 # super-register DW_OP_reg5
.quad .Ltmp0-.Lfunc_begin0 .quad .Ltmp1-.Lfunc_begin0
.quad .Lfunc_end0-.Lfunc_begin0 .quad .Ltmp3-.Lfunc_begin0
.short 1 # Loc expr size .short 1 # Loc expr size
.byte 80 # super-register DW_OP_reg0 .byte 83 # super-register DW_OP_reg3
.quad .Ltmp3-.Lfunc_begin0
.quad .Lfunc_end0-.Lfunc_begin0
.short 4 # Loc expr size
.byte 243 # DW_OP_GNU_entry_value
.byte 1 # 1
.byte 85 # super-register DW_OP_reg5
.byte 159 # DW_OP_stack_value
.quad 0 .quad 0
.quad 0 .quad 0
.Ldebug_loc1: .Ldebug_loc1:
.quad .Lfunc_begin1-.Lfunc_begin0 .quad .Lfunc_begin0-.Lfunc_begin0
.quad .Ltmp2-.Lfunc_begin0 .quad .Ltmp2-.Lfunc_begin0
.short 1 # Loc expr size .short 1 # Loc expr size
.byte 85 # super-register DW_OP_reg5 .byte 84 # DW_OP_reg4
.quad .Ltmp2-.Lfunc_begin0 .quad .Ltmp2-.Lfunc_begin0
.quad .Lfunc_end1-.Lfunc_begin0 .quad .Lfunc_end0-.Lfunc_begin0
.short 4 # Loc expr size
.byte 243 # DW_OP_GNU_entry_value
.byte 1 # 1
.byte 84 # DW_OP_reg4
.byte 159 # DW_OP_stack_value
.quad 0
.quad 0
.Ldebug_loc2:
.quad .Ltmp2-.Lfunc_begin0
.quad .Ltmp3-.Lfunc_begin0
.short 3 # Loc expr size
.byte 17 # DW_OP_consts
.byte 0 # 0
.byte 159 # DW_OP_stack_value
.quad .Ltmp3-.Lfunc_begin0
.quad .Ltmp4-.Lfunc_begin0
.short 1 # Loc expr size
.byte 83 # super-register DW_OP_reg3
.quad .Ltmp4-.Lfunc_begin0
.quad .Lfunc_end0-.Lfunc_begin0
.short 1 # Loc expr size .short 1 # Loc expr size
.byte 80 # super-register DW_OP_reg0 .byte 80 # super-register DW_OP_reg0
.quad 0 .quad 0
.quad 0 .quad 0
.section .debug_abbrev,"",@progbits .section .debug_abbrev,"",@progbits
.byte 1 # Abbreviation Code .byte 1 # Abbreviation Code
.byte 17 # DW_TAG_compile_unit .byte 17 # DW_TAG_compile_unit
.byte 1 # DW_CHILDREN_yes .byte 1 # DW_CHILDREN_yes
Show All 11 Lines.Ldebug_loc2:
.byte 1 # DW_FORM_addr .byte 1 # DW_FORM_addr
.byte 18 # DW_AT_high_pc .byte 18 # DW_AT_high_pc
.byte 6 # DW_FORM_data4 .byte 6 # DW_FORM_data4
.byte 0 # EOM(1) .byte 0 # EOM(1)
.byte 0 # EOM(2) .byte 0 # EOM(2)
.byte 2 # Abbreviation Code .byte 2 # Abbreviation Code
.byte 46 # DW_TAG_subprogram .byte 46 # DW_TAG_subprogram
.byte 1 # DW_CHILDREN_yes .byte 1 # DW_CHILDREN_yes
.byte 17 # DW_AT_low_pc
.byte 1 # DW_FORM_addr
.byte 18 # DW_AT_high_pc
.byte 6 # DW_FORM_data4
.byte 64 # DW_AT_frame_base
.byte 24 # DW_FORM_exprloc
.ascii "\227B" # DW_AT_GNU_all_call_sites
.byte 25 # DW_FORM_flag_present
.byte 49 # DW_AT_abstract_origin
.byte 19 # DW_FORM_ref4
.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 23 # DW_FORM_sec_offset
.byte 49 # DW_AT_abstract_origin
.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 110 # DW_AT_linkage_name .byte 110 # DW_AT_linkage_name
.byte 14 # DW_FORM_strp .byte 14 # DW_FORM_strp
.byte 3 # DW_AT_name .byte 3 # DW_AT_name
.byte 14 # DW_FORM_strp .byte 14 # DW_FORM_strp
.byte 58 # DW_AT_decl_file .byte 58 # DW_AT_decl_file
.byte 11 # DW_FORM_data1 .byte 11 # DW_FORM_data1
.byte 59 # DW_AT_decl_line .byte 59 # DW_AT_decl_line
.byte 11 # DW_FORM_data1 .byte 11 # DW_FORM_data1
.byte 73 # DW_AT_type .byte 73 # DW_AT_type
.byte 19 # DW_FORM_ref4 .byte 19 # DW_FORM_ref4
.byte 63 # DW_AT_external
.byte 25 # DW_FORM_flag_present
.byte 32 # DW_AT_inline .byte 32 # DW_AT_inline
.byte 11 # DW_FORM_data1 .byte 11 # DW_FORM_data1
.byte 0 # EOM(1) .byte 0 # EOM(1)
.byte 0 # EOM(2) .byte 0 # EOM(2)
.byte 5 # Abbreviation Code .byte 3 # Abbreviation Code
.byte 5 # DW_TAG_formal_parameter .byte 5 # DW_TAG_formal_parameter
.byte 0 # DW_CHILDREN_no .byte 0 # DW_CHILDREN_no
.byte 3 # DW_AT_name .byte 3 # DW_AT_name
.byte 14 # DW_FORM_strp .byte 14 # DW_FORM_strp
.byte 58 # DW_AT_decl_file .byte 58 # DW_AT_decl_file
.byte 11 # DW_FORM_data1 .byte 11 # DW_FORM_data1
.byte 59 # DW_AT_decl_line .byte 59 # DW_AT_decl_line
.byte 11 # DW_FORM_data1 .byte 11 # DW_FORM_data1
.byte 73 # DW_AT_type .byte 73 # DW_AT_type
.byte 19 # DW_FORM_ref4 .byte 19 # DW_FORM_ref4
.byte 0 # EOM(1) .byte 0 # EOM(1)
.byte 0 # EOM(2) .byte 0 # EOM(2)
.byte 6 # Abbreviation Code .byte 4 # Abbreviation Code
.byte 36 # DW_TAG_base_type .byte 36 # DW_TAG_base_type
.byte 0 # DW_CHILDREN_no .byte 0 # DW_CHILDREN_no
.byte 3 # DW_AT_name .byte 3 # DW_AT_name
.byte 14 # DW_FORM_strp .byte 14 # DW_FORM_strp
.byte 62 # DW_AT_encoding .byte 62 # DW_AT_encoding
.byte 11 # DW_FORM_data1 .byte 11 # DW_FORM_data1
.byte 11 # DW_AT_byte_size .byte 11 # DW_AT_byte_size
.byte 11 # DW_FORM_data1 .byte 11 # DW_FORM_data1
.byte 0 # EOM(1) .byte 0 # EOM(1)
.byte 0 # EOM(2) .byte 0 # EOM(2)
.byte 7 # Abbreviation Code .byte 5 # Abbreviation Code
.byte 46 # DW_TAG_subprogram .byte 46 # DW_TAG_subprogram
.byte 1 # DW_CHILDREN_yes .byte 1 # DW_CHILDREN_yes
.byte 17 # DW_AT_low_pc .byte 17 # DW_AT_low_pc
.byte 1 # DW_FORM_addr .byte 1 # DW_FORM_addr
.byte 18 # DW_AT_high_pc .byte 18 # DW_AT_high_pc
.byte 6 # DW_FORM_data4 .byte 6 # DW_FORM_data4
.byte 64 # DW_AT_frame_base .byte 64 # DW_AT_frame_base
.byte 24 # DW_FORM_exprloc .byte 24 # DW_FORM_exprloc
.ascii "\227B" # DW_AT_GNU_all_call_sites .ascii "\227B" # DW_AT_GNU_all_call_sites
.byte 25 # DW_FORM_flag_present .byte 25 # DW_FORM_flag_present
.byte 3 # DW_AT_name .byte 3 # DW_AT_name
.byte 14 # DW_FORM_strp .byte 14 # DW_FORM_strp
.byte 58 # DW_AT_decl_file .byte 58 # DW_AT_decl_file
.byte 11 # DW_FORM_data1 .byte 11 # DW_FORM_data1
.byte 59 # DW_AT_decl_line .byte 59 # DW_AT_decl_line
.byte 11 # DW_FORM_data1 .byte 11 # DW_FORM_data1
.byte 73 # DW_AT_type .byte 73 # DW_AT_type
.byte 19 # DW_FORM_ref4 .byte 19 # DW_FORM_ref4
.byte 63 # DW_AT_external .byte 63 # DW_AT_external
.byte 25 # DW_FORM_flag_present .byte 25 # DW_FORM_flag_present
.byte 0 # EOM(1) .byte 0 # EOM(1)
.byte 0 # EOM(2) .byte 0 # EOM(2)
.byte 8 # Abbreviation Code .byte 6 # Abbreviation Code
.byte 5 # DW_TAG_formal_parameter .byte 5 # DW_TAG_formal_parameter
.byte 0 # DW_CHILDREN_no .byte 0 # DW_CHILDREN_no
.byte 2 # DW_AT_location .byte 2 # DW_AT_location
.byte 24 # DW_FORM_exprloc .byte 23 # DW_FORM_sec_offset
.byte 3 # DW_AT_name .byte 3 # DW_AT_name
.byte 14 # DW_FORM_strp .byte 14 # DW_FORM_strp
.byte 58 # DW_AT_decl_file .byte 58 # DW_AT_decl_file
.byte 11 # DW_FORM_data1 .byte 11 # DW_FORM_data1
.byte 59 # DW_AT_decl_line .byte 59 # DW_AT_decl_line
.byte 11 # DW_FORM_data1 .byte 11 # DW_FORM_data1
.byte 73 # DW_AT_type .byte 73 # DW_AT_type
.byte 19 # DW_FORM_ref4 .byte 19 # DW_FORM_ref4
.byte 0 # EOM(1) .byte 0 # EOM(1)
.byte 0 # EOM(2) .byte 0 # EOM(2)
.byte 9 # Abbreviation Code .byte 7 # Abbreviation Code
.byte 52 # DW_TAG_variable
.byte 0 # DW_CHILDREN_no
.byte 2 # DW_AT_location
.byte 23 # DW_FORM_sec_offset
.byte 3 # DW_AT_name
.byte 14 # DW_FORM_strp
.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 29 # DW_TAG_inlined_subroutine .byte 29 # DW_TAG_inlined_subroutine
.byte 1 # DW_CHILDREN_yes .byte 1 # DW_CHILDREN_yes
.byte 49 # DW_AT_abstract_origin .byte 49 # DW_AT_abstract_origin
.byte 19 # DW_FORM_ref4 .byte 19 # DW_FORM_ref4
.byte 17 # DW_AT_low_pc .byte 17 # DW_AT_low_pc
.byte 1 # DW_FORM_addr .byte 1 # DW_FORM_addr
.byte 18 # DW_AT_high_pc .byte 18 # DW_AT_high_pc
.byte 6 # DW_FORM_data4 .byte 6 # DW_FORM_data4
.byte 88 # DW_AT_call_file .byte 88 # DW_AT_call_file
.byte 11 # DW_FORM_data1 .byte 11 # DW_FORM_data1
.byte 89 # DW_AT_call_line .byte 89 # DW_AT_call_line
.byte 11 # DW_FORM_data1 .byte 11 # DW_FORM_data1
.byte 87 # DW_AT_call_column .byte 87 # DW_AT_call_column
.byte 11 # DW_FORM_data1 .byte 11 # DW_FORM_data1
.byte 0 # EOM(1) .byte 0 # EOM(1)
.byte 0 # EOM(2) .byte 0 # EOM(2)
.byte 9 # Abbreviation Code
.byte 5 # DW_TAG_formal_parameter
.byte 0 # DW_CHILDREN_no
.byte 2 # DW_AT_location
.byte 24 # DW_FORM_exprloc
.byte 49 # DW_AT_abstract_origin
.byte 19 # DW_FORM_ref4
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 10 # Abbreviation Code .byte 10 # Abbreviation Code
.ascii "\211\202\001" # DW_TAG_GNU_call_site
.byte 0 # DW_CHILDREN_no
.byte 49 # DW_AT_abstract_origin
.byte 19 # DW_FORM_ref4
.byte 17 # DW_AT_low_pc
.byte 1 # DW_FORM_addr
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 11 # Abbreviation Code
.byte 46 # DW_TAG_subprogram
.byte 0 # DW_CHILDREN_no
.byte 110 # DW_AT_linkage_name
.byte 14 # DW_FORM_strp
.byte 3 # DW_AT_name
.byte 14 # DW_FORM_strp
.byte 58 # DW_AT_decl_file
.byte 11 # DW_FORM_data1
.byte 59 # DW_AT_decl_line
.byte 11 # DW_FORM_data1
.byte 60 # DW_AT_declaration
.byte 25 # DW_FORM_flag_present
.byte 63 # DW_AT_external
.byte 25 # DW_FORM_flag_present
.byte 0 # EOM(1)
.byte 0 # EOM(2)
.byte 12 # Abbreviation Code
.byte 15 # DW_TAG_pointer_type .byte 15 # DW_TAG_pointer_type
.byte 0 # DW_CHILDREN_no .byte 0 # DW_CHILDREN_no
.byte 73 # DW_AT_type .byte 73 # DW_AT_type
.byte 19 # DW_FORM_ref4 .byte 19 # DW_FORM_ref4
.byte 0 # EOM(1) .byte 0 # EOM(1)
.byte 0 # EOM(2) .byte 0 # EOM(2)
.byte 0 # EOM(3) .byte 0 # EOM(3)
.section .debug_info,"",@progbits .section .debug_info,"",@progbits
.Lcu_begin0: .Lcu_begin0:
.long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit .long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
.Ldebug_info_start0: .Ldebug_info_start0:
.short 4 # DWARF version number .short 4 # DWARF version number
.long .debug_abbrev # Offset Into Abbrev. Section .long .debug_abbrev # Offset Into Abbrev. Section
.byte 8 # Address Size (in bytes) .byte 8 # Address Size (in bytes)
.byte 1 # Abbrev [1] 0xb:0xc3 DW_TAG_compile_unit .byte 1 # Abbrev [1] 0xb:0xcf DW_TAG_compile_unit
.long .Linfo_string0 # DW_AT_producer .long .Linfo_string0 # DW_AT_producer
.short 33 # DW_AT_language .short 33 # DW_AT_language
.long .Linfo_string1 # DW_AT_name .long .Linfo_string1 # DW_AT_name
.long .Lline_table_start0 # DW_AT_stmt_list .long .Lline_table_start0 # DW_AT_stmt_list
.long .Linfo_string2 # DW_AT_comp_dir .long .Linfo_string2 # DW_AT_comp_dir
.quad .Lfunc_begin0 # DW_AT_low_pc .quad .Lfunc_begin0 # DW_AT_low_pc
.long .Lfunc_end1-.Lfunc_begin0 # DW_AT_high_pc
.byte 2 # Abbrev [2] 0x2a:0x1d DW_TAG_subprogram
.quad .Lfunc_begin0 # DW_AT_low_pc
.long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
.byte 1 # DW_AT_frame_base .byte 2 # Abbrev [2] 0x2a:0x1c DW_TAG_subprogram
.byte 87
# DW_AT_GNU_all_call_sites
.long 71 # DW_AT_abstract_origin
.byte 3 # Abbrev [3] 0x3d:0x9 DW_TAG_formal_parameter
.long .Ldebug_loc0 # DW_AT_location
.long 87 # DW_AT_abstract_origin
.byte 0 # End Of Children Mark
.byte 4 # Abbrev [4] 0x47:0x1c DW_TAG_subprogram
.long .Linfo_string3 # DW_AT_linkage_name .long .Linfo_string3 # DW_AT_linkage_name
.long .Linfo_string4 # DW_AT_name .long .Linfo_string4 # DW_AT_name
.byte 1 # DW_AT_decl_file .byte 1 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line .byte 1 # DW_AT_decl_line
.long 99 # DW_AT_type .long 70 # DW_AT_type
# DW_AT_external
.byte 1 # DW_AT_inline .byte 1 # DW_AT_inline
.byte 5 # Abbrev [5] 0x57:0xb DW_TAG_formal_parameter .byte 3 # Abbrev [3] 0x3a:0xb DW_TAG_formal_parameter
.long .Linfo_string6 # DW_AT_name .long .Linfo_string6 # DW_AT_name
.byte 1 # DW_AT_decl_file .byte 1 # DW_AT_decl_file
.byte 1 # DW_AT_decl_line .byte 1 # DW_AT_decl_line
.long 99 # DW_AT_type .long 70 # DW_AT_type
.byte 0 # End Of Children Mark .byte 0 # End Of Children Mark
.byte 6 # Abbrev [6] 0x63:0x7 DW_TAG_base_type .byte 4 # Abbrev [4] 0x46:0x7 DW_TAG_base_type
.long .Linfo_string5 # DW_AT_name .long .Linfo_string5 # DW_AT_name
.byte 5 # DW_AT_encoding .byte 5 # DW_AT_encoding
.byte 4 # DW_AT_byte_size .byte 4 # DW_AT_byte_size
.byte 7 # Abbrev [7] 0x6a:0x52 DW_TAG_subprogram .byte 5 # Abbrev [5] 0x4d:0x70 DW_TAG_subprogram
.quad .Lfunc_begin1 # DW_AT_low_pc .quad .Lfunc_begin0 # DW_AT_low_pc
.long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
.byte 1 # DW_AT_frame_base .byte 1 # DW_AT_frame_base
.byte 87 .byte 87
# DW_AT_GNU_all_call_sites # DW_AT_GNU_all_call_sites
.long .Linfo_string7 # DW_AT_name .long .Linfo_string9 # DW_AT_name
.byte 1 # DW_AT_decl_file .byte 1 # DW_AT_decl_file
.byte 5 # DW_AT_decl_line .byte 5 # DW_AT_decl_line
.long 99 # DW_AT_type .long 70 # DW_AT_type
# DW_AT_external # DW_AT_external
.byte 8 # Abbrev [8] 0x83:0xd DW_TAG_formal_parameter .byte 6 # Abbrev [6] 0x66:0xf DW_TAG_formal_parameter
.byte 1 # DW_AT_location .long .Ldebug_loc0 # DW_AT_location
.byte 85 .long .Linfo_string10 # DW_AT_name
.long .Linfo_string8 # DW_AT_name
.byte 1 # DW_AT_decl_file .byte 1 # DW_AT_decl_file
.byte 5 # DW_AT_decl_line .byte 5 # DW_AT_decl_line
.long 99 # DW_AT_type .long 70 # DW_AT_type
.byte 8 # Abbrev [8] 0x90:0xd DW_TAG_formal_parameter .byte 6 # Abbrev [6] 0x75:0xf DW_TAG_formal_parameter
.byte 1 # DW_AT_location .long .Ldebug_loc1 # DW_AT_location
.byte 84 .long .Linfo_string11 # DW_AT_name
.long .Linfo_string9 # DW_AT_name
.byte 1 # DW_AT_decl_file .byte 1 # DW_AT_decl_file
.byte 5 # DW_AT_decl_line .byte 5 # DW_AT_decl_line
.long 188 # DW_AT_type .long 200 # DW_AT_type
.byte 9 # Abbrev [9] 0x9d:0x1e DW_TAG_inlined_subroutine .byte 7 # Abbrev [7] 0x84:0xf DW_TAG_variable
.long 71 # DW_AT_abstract_origin .long .Ldebug_loc2 # DW_AT_location
.quad .Lfunc_begin1 # DW_AT_low_pc .long .Linfo_string13 # DW_AT_name
.long 0 # DW_AT_high_pc # This was manually modified to be 0 .byte 1 # DW_AT_decl_file
.byte 8 # DW_AT_decl_line
.long 70 # DW_AT_type
.byte 8 # Abbrev [8] 0x93:0x1c DW_TAG_inlined_subroutine
.long 42 # DW_AT_abstract_origin
.quad .Ltmp2 # DW_AT_low_pc
.long 0 # DW_AT_high_pc Manually modified
.byte 1 # DW_AT_call_file .byte 1 # DW_AT_call_file
.byte 6 # DW_AT_call_line .byte 9 # DW_AT_call_line
.byte 10 # DW_AT_call_column .byte 32 # DW_AT_call_column
.byte 3 # Abbrev [3] 0xb1:0x9 DW_TAG_formal_parameter .byte 9 # Abbrev [9] 0xa7:0x7 DW_TAG_formal_parameter
.long .Ldebug_loc1 # DW_AT_location .byte 1 # DW_AT_location
.long 87 # DW_AT_abstract_origin .byte 83
.long 58 # DW_AT_abstract_origin
.byte 0 # End Of Children Mark .byte 0 # End Of Children Mark
.byte 10 # Abbrev [10] 0xaf:0xd DW_TAG_GNU_call_site
.long 189 # DW_AT_abstract_origin
.quad .Ltmp2 # DW_AT_low_pc
.byte 0 # End Of Children Mark .byte 0 # End Of Children Mark
.byte 10 # Abbrev [10] 0xbc:0x5 DW_TAG_pointer_type .byte 11 # Abbrev [11] 0xbd:0xb DW_TAG_subprogram
.long 193 # DW_AT_type .long .Linfo_string7 # DW_AT_linkage_name
.byte 10 # Abbrev [10] 0xc1:0x5 DW_TAG_pointer_type .long .Linfo_string8 # DW_AT_name
.long 198 # DW_AT_type .byte 1 # DW_AT_decl_file
.byte 6 # Abbrev [6] 0xc6:0x7 DW_TAG_base_type .byte 4 # DW_AT_decl_line
.long .Linfo_string10 # DW_AT_name # DW_AT_declaration
# DW_AT_external
.byte 12 # Abbrev [12] 0xc8:0x5 DW_TAG_pointer_type
.long 205 # DW_AT_type
.byte 12 # Abbrev [12] 0xcd:0x5 DW_TAG_pointer_type
.long 210 # DW_AT_type
.byte 4 # Abbrev [4] 0xd2:0x7 DW_TAG_base_type
.long .Linfo_string12 # DW_AT_name
.byte 6 # DW_AT_encoding .byte 6 # DW_AT_encoding
.byte 1 # DW_AT_byte_size .byte 1 # DW_AT_byte_size
.byte 0 # End Of Children Mark .byte 0 # End Of Children Mark
.Ldebug_info_end0: .Ldebug_info_end0:
.section .debug_str,"MS",@progbits,1 .section .debug_str,"MS",@progbits,1
.Linfo_string0: .Linfo_string0:
.asciz "clang version 15.0.0" # string offset=0 .asciz "clang version 16.0.0" # string offset=0
.Linfo_string1: .Linfo_string1:
.asciz "main.cpp" # string offset=134 .asciz "main.cpp" # string offset=105
.Linfo_string2: .Linfo_string2:
.asciz "." # string offset=143 .asciz "." # string offset=114
.Linfo_string3: .Linfo_string3:
.asciz "_Z6helperi" # string offset=181 .asciz "_ZL6helperi" # string offset=152
.Linfo_string4: .Linfo_string4:
.asciz "helper" # string offset=192 .asciz "helper" # string offset=164
.Linfo_string5: .Linfo_string5:
.asciz "int" # string offset=199 .asciz "int" # string offset=171
.Linfo_string6: .Linfo_string6:
.asciz "i" # string offset=203 .asciz "i" # string offset=175
.Linfo_string7: .Linfo_string7:
.asciz "main" # string offset=205 .asciz "_Z13may_not_existv" # string offset=177
.Linfo_string8: .Linfo_string8:
.asciz "argc" # string offset=210 .asciz "may_not_exist" # string offset=196
.Linfo_string9: .Linfo_string9:
.asciz "argv" # string offset=215 .asciz "main" # string offset=210
.Linfo_string10: .Linfo_string10:
.asciz "char" # string offset=220 .asciz "argc" # string offset=215
.ident "clang version 15.0.0" .Linfo_string11:
.asciz "argv" # string offset=220
.Linfo_string12:
.asciz "char" # string offset=225
.Linfo_string13:
.asciz "j" # string offset=230
.weak _Z13may_not_existv
.ident "clang version 16.0.0"
.section ".note.GNU-stack","",@progbits .section ".note.GNU-stack","",@progbits
.addrsig .addrsig
.addrsig_sym _Z13may_not_existv
.section .debug_line,"",@progbits .section .debug_line,"",@progbits
.Lline_table_start0: .Lline_table_start0: