[llvm] 9f60820 - llvm-symbolizer: Support loclist in FRAME.
Evgenii Stepanov via llvm-commits
llvm-commits at lists.llvm.org
Mon Nov 25 15:12:40 PST 2019
Author: Evgenii Stepanov
Date: 2019-11-25T15:06:07-08:00
New Revision: 9f60820d8416a3e6839624839301a491ddb5d2a0
URL: https://github.com/llvm/llvm-project/commit/9f60820d8416a3e6839624839301a491ddb5d2a0
DIFF: https://github.com/llvm/llvm-project/commit/9f60820d8416a3e6839624839301a491ddb5d2a0.diff
LOG: llvm-symbolizer: Support loclist in FRAME.
Summary:
Support location lists in FRAME command.
These are used for the majority of local variables in optimized code.
Also support DW_OP_breg in addition to DW_OP_fbreg when it refers to the
same register as DW_AT_frame_base.
Reviewers: pcc, jdoerfert
Subscribers: srhines, hiraditya, rupprecht, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D70629
Added:
llvm/test/tools/llvm-symbolizer/frame-loclist.s
Modified:
llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
Removed:
################################################################################
diff --git a/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp b/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
index 012bab354600..0084d3167d51 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
@@ -1043,6 +1043,52 @@ static Optional<uint64_t> getTypeSize(DWARFDie Type, uint64_t PointerSize) {
return Optional<uint64_t>();
}
+static Optional<int64_t>
+getExpressionFrameOffset(ArrayRef<uint8_t> Expr,
+ Optional<unsigned> FrameBaseReg) {
+ if (!Expr.empty() &&
+ (Expr[0] == DW_OP_fbreg ||
+ (FrameBaseReg && Expr[0] == DW_OP_breg0 + *FrameBaseReg))) {
+ unsigned Count;
+ int64_t Offset = decodeSLEB128(Expr.data() + 1, &Count, Expr.end());
+ // A single DW_OP_fbreg or DW_OP_breg.
+ if (Expr.size() == Count + 1)
+ return Offset;
+ // Same + DW_OP_deref (Fortran arrays look like this).
+ if (Expr.size() == Count + 2 && Expr[Count + 1] == DW_OP_deref)
+ return Offset;
+ // Fallthrough. Do not accept ex. (DW_OP_breg W29, DW_OP_stack_value)
+ }
+ return None;
+}
+
+static Optional<int64_t>
+getLocationFrameOffset(DWARFCompileUnit *CU, DWARFFormValue &FormValue,
+ Optional<unsigned> FrameBaseReg) {
+ if (Optional<ArrayRef<uint8_t>> Location = FormValue.getAsBlock()) {
+ return getExpressionFrameOffset(*Location, FrameBaseReg);
+ } else if (FormValue.isFormClass(DWARFFormValue::FC_SectionOffset)) {
+ uint64_t Offset = *FormValue.getAsSectionOffset();
+ const DWARFLocationTable &LocTable = CU->getLocationTable();
+ Optional<int64_t> FrameOffset;
+ Error E = LocTable.visitLocationList(
+ &Offset, [&](const DWARFLocationEntry &Entry) {
+ if (Entry.Kind == dwarf::DW_LLE_base_address ||
+ Entry.Kind == dwarf::DW_LLE_base_addressx ||
+ Entry.Kind == dwarf::DW_LLE_end_of_list) {
+ return true;
+ }
+ if ((FrameOffset = getExpressionFrameOffset(Entry.Loc, FrameBaseReg)))
+ return false;
+ return true;
+ });
+ if (E)
+ return None;
+ return FrameOffset;
+ }
+ return None;
+}
+
void DWARFContext::addLocalsForDie(DWARFCompileUnit *CU, DWARFDie Subprogram,
DWARFDie Die, std::vector<DILocal> &Result) {
if (Die.getTag() == DW_TAG_variable ||
@@ -1051,11 +1097,17 @@ void DWARFContext::addLocalsForDie(DWARFCompileUnit *CU, DWARFDie Subprogram,
if (auto NameAttr = Subprogram.find(DW_AT_name))
if (Optional<const char *> Name = NameAttr->getAsCString())
Local.FunctionName = *Name;
+
+ Optional<unsigned> FrameBaseReg;
+ if (auto FrameBase = Subprogram.find(DW_AT_frame_base))
+ if (Optional<ArrayRef<uint8_t>> Expr = FrameBase->getAsBlock())
+ if (!Expr->empty() && (*Expr)[0] >= DW_OP_reg0 &&
+ (*Expr)[0] <= DW_OP_reg31) {
+ FrameBaseReg = (*Expr)[0] - DW_OP_reg0;
+ }
if (auto LocationAttr = Die.find(DW_AT_location))
- if (Optional<ArrayRef<uint8_t>> Location = LocationAttr->getAsBlock())
- if (!Location->empty() && (*Location)[0] == DW_OP_fbreg)
- Local.FrameOffset =
- decodeSLEB128(Location->data() + 1, nullptr, Location->end());
+ Local.FrameOffset = getLocationFrameOffset(CU, *LocationAttr, FrameBaseReg);
+
if (auto TagOffsetAttr = Die.find(DW_AT_LLVM_tag_offset))
Local.TagOffset = TagOffsetAttr->getAsUnsignedConstant();
diff --git a/llvm/test/tools/llvm-symbolizer/frame-loclist.s b/llvm/test/tools/llvm-symbolizer/frame-loclist.s
new file mode 100644
index 000000000000..91e35c3f2d01
--- /dev/null
+++ b/llvm/test/tools/llvm-symbolizer/frame-loclist.s
@@ -0,0 +1,588 @@
+// Test various single-location and location list formats.
+// REQUIRES: aarch64-registered-target
+
+// RUN: llvm-mc -filetype=obj -triple=aarch64-linux-android -o %t.o %s
+// RUN: echo -e 'FRAME %t.o 0x4\nFRAME %t.o 0x24\nFRAME %t.o 0x48\nFRAME %t.o 0x6a\nFRAME %t.o 0x9a' | llvm-symbolizer | FileCheck %s
+
+// DW_AT_location (DW_OP_breg29 W29-4)
+// CHECK: func00
+// CHECK-NEXT: x
+// CHECK-NEXT: /tmp/dbg.cc:7
+// CHECK-NEXT: -4 4 ??
+
+// DW_AT_location (DW_OP_fbreg -4)
+// CHECK: func0{{$}}
+// CHECK-NEXT: x
+// CHECK-NEXT: /tmp/dbg.cc:12
+// CHECK-NEXT: -4 4 ??
+
+// DW_AT_location (0x00000000:
+// [0x000000000000004c, 0x0000000000000058): DW_OP_breg29 W29-4
+// [0x0000000000000058, 0x000000000000005c): DW_OP_reg0 W0)
+// CHECK: func1
+// CHECK-NEXT: x
+// CHECK-NEXT: /tmp/dbg.cc:17
+// CHECK-NEXT: -4 4 ??
+
+// DW_AT_location (0x00000037:
+// [0x0000000000000078, 0x0000000000000080): DW_OP_consts +1, DW_OP_stack_value
+// [0x0000000000000080, 0x0000000000000088): DW_OP_breg29 W29-4
+// [0x0000000000000088, 0x000000000000008c): DW_OP_reg0 W0)
+// CHECK: func2
+// CHECK-NEXT: x
+// CHECK-NEXT: /tmp/dbg.cc:23
+// CHECK-NEXT: -4 4 ??
+
+// location lost
+// DW_AT_location (0x00000083:
+// [0x00000000000000a8, 0x00000000000000b8): DW_OP_consts +1, DW_OP_stack_value
+// [0x00000000000000b8, 0x00000000000000bc): DW_OP_reg0 W0)
+// CHECK: func3
+// CHECK-NEXT: x
+// CHECK-NEXT: /tmp/dbg.cc:29
+// CHECK-NEXT: ?? 4 ??
+
+ .text
+ .file "dbg.cc"
+ .file 1 "/tmp" "dbg.cc"
+ .globl func00 // -- Begin function func00
+ .p2align 2
+ .type func00, at function
+func00: // @func00
+.Lfunc_begin0:
+ .loc 1 6 0 // /tmp/dbg.cc:6:0
+ .cfi_startproc
+// %bb.0: // %entry
+ sub sp, sp, #32 // =32
+ stp x29, x30, [sp, #16] // 16-byte Folded Spill
+ add x29, sp, #16 // =16
+ .cfi_def_cfa w29, 16
+ .cfi_offset w30, -8
+ .cfi_offset w29, -16
+.Ltmp0:
+ //DEBUG_VALUE: func00:x <- [DW_OP_constu 4, DW_OP_minus, DW_OP_deref] $fp
+ .loc 1 8 3 prologue_end // /tmp/dbg.cc:8:3
+ sub x0, x29, #4 // =4
+ bl use
+.Ltmp1:
+ .loc 1 9 1 // /tmp/dbg.cc:9:1
+ ldp x29, x30, [sp, #16] // 16-byte Folded Reload
+ add sp, sp, #32 // =32
+ ret
+.Ltmp2:
+.Lfunc_end0:
+ .size func00, .Lfunc_end0-func00
+ .cfi_endproc
+ // -- End function
+ .globl func0 // -- Begin function func0
+ .p2align 2
+ .type func0, at function
+func0: // @func0
+.Lfunc_begin1:
+ .loc 1 11 0 // /tmp/dbg.cc:11:0
+ .cfi_startproc
+// %bb.0: // %entry
+ sub sp, sp, #32 // =32
+ stp x29, x30, [sp, #16] // 16-byte Folded Spill
+ add x29, sp, #16 // =16
+ .cfi_def_cfa w29, 16
+ .cfi_offset w30, -8
+ .cfi_offset w29, -16
+.Ltmp3:
+ //DEBUG_VALUE: func0:x <- [DW_OP_constu 4, DW_OP_minus, DW_OP_deref] $fp
+ .loc 1 13 3 prologue_end // /tmp/dbg.cc:13:3
+ sub x0, x29, #4 // =4
+ bl use
+.Ltmp4:
+ .loc 1 14 1 // /tmp/dbg.cc:14:1
+ ldp x29, x30, [sp, #16] // 16-byte Folded Reload
+ add sp, sp, #32 // =32
+ ret
+.Ltmp5:
+.Lfunc_end1:
+ .size func0, .Lfunc_end1-func0
+ .cfi_endproc
+ // -- End function
+ .globl func1 // -- Begin function func1
+ .p2align 2
+ .type func1, at function
+func1: // @func1
+.Lfunc_begin2:
+ .loc 1 16 0 // /tmp/dbg.cc:16:0
+ .cfi_startproc
+// %bb.0: // %entry
+ sub sp, sp, #32 // =32
+ stp x29, x30, [sp, #16] // 16-byte Folded Spill
+ add x29, sp, #16 // =16
+ .cfi_def_cfa w29, 16
+ .cfi_offset w30, -8
+ .cfi_offset w29, -16
+.Ltmp6:
+ //DEBUG_VALUE: func1:x <- [DW_OP_constu 4, DW_OP_minus, DW_OP_deref] $fp
+ .loc 1 18 3 prologue_end // /tmp/dbg.cc:18:3
+ sub x0, x29, #4 // =4
+ bl use
+.Ltmp7:
+ .loc 1 19 8 // /tmp/dbg.cc:19:8
+ ldur w0, [x29, #-4]
+.Ltmp8:
+ //DEBUG_VALUE: func1:x <- $w0
+ .loc 1 19 3 is_stmt 0 // /tmp/dbg.cc:19:3
+ bl usev
+.Ltmp9:
+ .loc 1 20 1 is_stmt 1 // /tmp/dbg.cc:20:1
+ ldp x29, x30, [sp, #16] // 16-byte Folded Reload
+ add sp, sp, #32 // =32
+ ret
+.Ltmp10:
+.Lfunc_end2:
+ .size func1, .Lfunc_end2-func1
+ .cfi_endproc
+ // -- End function
+ .globl func2 // -- Begin function func2
+ .p2align 2
+ .type func2, at function
+func2: // @func2
+.Lfunc_begin3:
+ .loc 1 22 0 // /tmp/dbg.cc:22:0
+ .cfi_startproc
+// %bb.0: // %entry
+ sub sp, sp, #32 // =32
+ stp x29, x30, [sp, #16] // 16-byte Folded Spill
+ add x29, sp, #16 // =16
+ .cfi_def_cfa w29, 16
+ .cfi_offset w30, -8
+ .cfi_offset w29, -16
+ mov w8, #1
+.Ltmp11:
+ //DEBUG_VALUE: func2:x <- 1
+ .loc 1 24 3 prologue_end // /tmp/dbg.cc:24:3
+ sub x0, x29, #4 // =4
+ .loc 1 23 7 // /tmp/dbg.cc:23:7
+ stur w8, [x29, #-4]
+.Ltmp12:
+ //DEBUG_VALUE: func2:x <- [DW_OP_constu 4, DW_OP_minus, DW_OP_deref] $fp
+ .loc 1 24 3 // /tmp/dbg.cc:24:3
+ bl use
+.Ltmp13:
+ .loc 1 25 8 // /tmp/dbg.cc:25:8
+ ldur w0, [x29, #-4]
+.Ltmp14:
+ //DEBUG_VALUE: func2:x <- $w0
+ .loc 1 25 3 is_stmt 0 // /tmp/dbg.cc:25:3
+ bl usev
+.Ltmp15:
+ .loc 1 26 1 is_stmt 1 // /tmp/dbg.cc:26:1
+ ldp x29, x30, [sp, #16] // 16-byte Folded Reload
+ add sp, sp, #32 // =32
+ ret
+.Ltmp16:
+.Lfunc_end3:
+ .size func2, .Lfunc_end3-func2
+ .cfi_endproc
+ // -- End function
+ .globl func3 // -- Begin function func3
+ .p2align 2
+ .type func3, at function
+func3: // @func3
+.Lfunc_begin4:
+ .loc 1 28 0 // /tmp/dbg.cc:28:0
+ .cfi_startproc
+// %bb.0: // %entry
+ sub sp, sp, #32 // =32
+ stp x29, x30, [sp, #16] // 16-byte Folded Spill
+ add x29, sp, #16 // =16
+ .cfi_def_cfa w29, 16
+ .cfi_offset w30, -8
+ .cfi_offset w29, -16
+ mov w8, #1
+.Ltmp17:
+ //DEBUG_VALUE: func3:x <- 1
+ .loc 1 30 3 prologue_end // /tmp/dbg.cc:30:3
+ sub x0, x29, #4 // =4
+ .loc 1 29 7 // /tmp/dbg.cc:29:7
+ stur w8, [x29, #-4]
+ .loc 1 30 3 // /tmp/dbg.cc:30:3
+ bl useV
+.Ltmp18:
+ .loc 1 31 8 // /tmp/dbg.cc:31:8
+ ldur w0, [x29, #-4]
+.Ltmp19:
+ //DEBUG_VALUE: func3:x <- $w0
+ .loc 1 31 3 is_stmt 0 // /tmp/dbg.cc:31:3
+ bl usev
+.Ltmp20:
+ .loc 1 32 1 is_stmt 1 // /tmp/dbg.cc:32:1
+ ldp x29, x30, [sp, #16] // 16-byte Folded Reload
+ add sp, sp, #32 // =32
+ ret
+.Ltmp21:
+.Lfunc_end4:
+ .size func3, .Lfunc_end4-func3
+ .cfi_endproc
+ // -- End function
+ .section .debug_str,"MS", at progbits,1
+.Linfo_string0:
+ .asciz "clang version 10.0.0 (git at github.com:llvm/llvm-project.git 5d25e153457e7bdd4181ab7496402a565a5b9370)" // string offset=0
+.Linfo_string1:
+ .asciz "/tmp/dbg.cc" // string offset=101
+.Linfo_string2:
+ .asciz "/code/build-llvm-cmake" // string offset=113
+.Linfo_string3:
+ .asciz "use" // string offset=136
+.Linfo_string4:
+ .asciz "int" // string offset=140
+.Linfo_string5:
+ .asciz "usev" // string offset=144
+.Linfo_string6:
+ .asciz "useV" // string offset=149
+.Linfo_string7:
+ .asciz "func00" // string offset=154
+.Linfo_string8:
+ .asciz "func0" // string offset=161
+.Linfo_string9:
+ .asciz "func1" // string offset=167
+.Linfo_string10:
+ .asciz "func2" // string offset=173
+.Linfo_string11:
+ .asciz "func3" // string offset=179
+.Linfo_string12:
+ .asciz "x" // string offset=185
+ .section .debug_loc,"", at progbits
+.Ldebug_loc0:
+ .xword .Ltmp6-.Lfunc_begin0
+ .xword .Ltmp8-.Lfunc_begin0
+ .hword 2 // Loc expr size
+ .byte 141 // DW_OP_breg29
+ .byte 124 // -4
+ .xword .Ltmp8-.Lfunc_begin0
+ .xword .Ltmp9-.Lfunc_begin0
+ .hword 1 // Loc expr size
+ .byte 80 // DW_OP_reg0
+ .xword 0
+ .xword 0
+.Ldebug_loc1:
+ .xword .Ltmp11-.Lfunc_begin0
+ .xword .Ltmp12-.Lfunc_begin0
+ .hword 3 // Loc expr size
+ .byte 17 // DW_OP_consts
+ .byte 1 // 1
+ .byte 159 // DW_OP_stack_value
+ .xword .Ltmp12-.Lfunc_begin0
+ .xword .Ltmp14-.Lfunc_begin0
+ .hword 2 // Loc expr size
+ .byte 141 // DW_OP_breg29
+ .byte 124 // -4
+ .xword .Ltmp14-.Lfunc_begin0
+ .xword .Ltmp15-.Lfunc_begin0
+ .hword 1 // Loc expr size
+ .byte 80 // DW_OP_reg0
+ .xword 0
+ .xword 0
+.Ldebug_loc2:
+ .xword .Ltmp17-.Lfunc_begin0
+ .xword .Ltmp19-.Lfunc_begin0
+ .hword 3 // Loc expr size
+ .byte 17 // DW_OP_consts
+ .byte 1 // 1
+ .byte 159 // DW_OP_stack_value
+ .xword .Ltmp19-.Lfunc_begin0
+ .xword .Ltmp20-.Lfunc_begin0
+ .hword 1 // Loc expr size
+ .byte 80 // DW_OP_reg0
+ .xword 0
+ .xword 0
+ .section .debug_abbrev,"", at progbits
+ .byte 1 // Abbreviation Code
+ .byte 17 // DW_TAG_compile_unit
+ .byte 1 // DW_CHILDREN_yes
+ .byte 37 // DW_AT_producer
+ .byte 14 // DW_FORM_strp
+ .byte 19 // DW_AT_language
+ .byte 5 // DW_FORM_data2
+ .byte 3 // DW_AT_name
+ .byte 14 // DW_FORM_strp
+ .byte 16 // DW_AT_stmt_list
+ .byte 23 // DW_FORM_sec_offset
+ .byte 27 // DW_AT_comp_dir
+ .byte 14 // DW_FORM_strp
+ .byte 17 // DW_AT_low_pc
+ .byte 1 // DW_FORM_addr
+ .byte 18 // DW_AT_high_pc
+ .byte 6 // DW_FORM_data4
+ .byte 0 // EOM(1)
+ .byte 0 // EOM(2)
+ .byte 2 // Abbreviation Code
+ .byte 46 // DW_TAG_subprogram
+ .byte 1 // DW_CHILDREN_yes
+ .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 3 // Abbreviation Code
+ .byte 5 // DW_TAG_formal_parameter
+ .byte 0 // DW_CHILDREN_no
+ .byte 73 // DW_AT_type
+ .byte 19 // DW_FORM_ref4
+ .byte 0 // EOM(1)
+ .byte 0 // EOM(2)
+ .byte 4 // 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 5 // Abbreviation Code
+ .byte 36 // DW_TAG_base_type
+ .byte 0 // DW_CHILDREN_no
+ .byte 3 // DW_AT_name
+ .byte 14 // DW_FORM_strp
+ .byte 62 // DW_AT_encoding
+ .byte 11 // DW_FORM_data1
+ .byte 11 // DW_AT_byte_size
+ .byte 11 // DW_FORM_data1
+ .byte 0 // EOM(1)
+ .byte 0 // EOM(2)
+ .byte 6 // Abbreviation Code
+ .byte 15 // DW_TAG_pointer_type
+ .byte 0 // DW_CHILDREN_no
+ .byte 0 // EOM(1)
+ .byte 0 // EOM(2)
+ .byte 7 // Abbreviation Code
+ .byte 46 // DW_TAG_subprogram
+ .byte 1 // DW_CHILDREN_yes
+ .byte 17 // DW_AT_low_pc
+ .byte 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 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 63 // DW_AT_external
+ .byte 25 // DW_FORM_flag_present
+ .byte 0 // EOM(1)
+ .byte 0 // EOM(2)
+ .byte 8 // 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 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 9 // 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 10 // 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 0 // EOM(3)
+ .section .debug_info,"", at progbits
+.Lcu_begin0:
+ .word .Ldebug_info_end0-.Ldebug_info_start0 // Length of Unit
+.Ldebug_info_start0:
+ .hword 4 // DWARF version number
+ .word .debug_abbrev // Offset Into Abbrev. Section
+ .byte 8 // Address Size (in bytes)
+ .byte 1 // Abbrev [1] 0xb:0x173 DW_TAG_compile_unit
+ .word .Linfo_string0 // DW_AT_producer
+ .hword 33 // DW_AT_language
+ .word .Linfo_string1 // DW_AT_name
+ .word .Lline_table_start0 // DW_AT_stmt_list
+ .word .Linfo_string2 // DW_AT_comp_dir
+ .xword .Lfunc_begin0 // DW_AT_low_pc
+ .word .Lfunc_end4-.Lfunc_begin0 // DW_AT_high_pc
+ .byte 2 // Abbrev [2] 0x2a:0xd DW_TAG_subprogram
+ .word .Linfo_string3 // DW_AT_name
+ .byte 1 // DW_AT_decl_file
+ .byte 3 // DW_AT_decl_line
+ // DW_AT_declaration
+ // DW_AT_external
+ .byte 3 // Abbrev [3] 0x31:0x5 DW_TAG_formal_parameter
+ .word 55 // DW_AT_type
+ .byte 0 // End Of Children Mark
+ .byte 4 // Abbrev [4] 0x37:0x5 DW_TAG_pointer_type
+ .word 60 // DW_AT_type
+ .byte 5 // Abbrev [5] 0x3c:0x7 DW_TAG_base_type
+ .word .Linfo_string4 // DW_AT_name
+ .byte 5 // DW_AT_encoding
+ .byte 4 // DW_AT_byte_size
+ .byte 2 // Abbrev [2] 0x43:0xd DW_TAG_subprogram
+ .word .Linfo_string5 // DW_AT_name
+ .byte 1 // DW_AT_decl_file
+ .byte 4 // DW_AT_decl_line
+ // DW_AT_declaration
+ // DW_AT_external
+ .byte 3 // Abbrev [3] 0x4a:0x5 DW_TAG_formal_parameter
+ .word 60 // DW_AT_type
+ .byte 0 // End Of Children Mark
+ .byte 2 // Abbrev [2] 0x50:0xd DW_TAG_subprogram
+ .word .Linfo_string6 // DW_AT_name
+ .byte 1 // DW_AT_decl_file
+ .byte 2 // DW_AT_decl_line
+ // DW_AT_declaration
+ // DW_AT_external
+ .byte 3 // Abbrev [3] 0x57:0x5 DW_TAG_formal_parameter
+ .word 93 // DW_AT_type
+ .byte 0 // End Of Children Mark
+ .byte 6 // Abbrev [6] 0x5d:0x1 DW_TAG_pointer_type
+ .byte 7 // Abbrev [7] 0x5e:0x31 DW_TAG_subprogram
+ .xword .Lfunc_begin0 // DW_AT_low_pc
+ .word .Lfunc_end0-.Lfunc_begin0 // DW_AT_high_pc
+ .byte 1 // DW_AT_frame_base
+ .byte 109
+ // DW_AT_GNU_all_call_sites
+ .word .Linfo_string7 // DW_AT_name
+ .byte 1 // DW_AT_decl_file
+ .byte 6 // DW_AT_decl_line
+ // DW_AT_external
+ .byte 8 // Abbrev [8] 0x73:0xe DW_TAG_variable
+ .byte 2 // DW_AT_location
+ .byte 141 // DW_OP_breg29
+ .byte 124 // -4
+ .word .Linfo_string12 // DW_AT_name
+ .byte 1 // DW_AT_decl_file
+ .byte 7 // DW_AT_decl_line
+ .word 60 // DW_AT_type
+ .byte 9 // Abbrev [9] 0x81:0xd DW_TAG_GNU_call_site
+ .word 42 // DW_AT_abstract_origin
+ .xword .Ltmp1 // DW_AT_low_pc
+ .byte 0 // End Of Children Mark
+ .byte 7 // Abbrev [7] 0x8f:0x31 DW_TAG_subprogram
+ .xword .Lfunc_begin1 // DW_AT_low_pc
+ .word .Lfunc_end1-.Lfunc_begin1 // DW_AT_high_pc
+ .byte 1 // DW_AT_frame_base
+ .byte 109
+ // DW_AT_GNU_all_call_sites
+ .word .Linfo_string8 // DW_AT_name
+ .byte 1 // DW_AT_decl_file
+ .byte 11 // DW_AT_decl_line
+ // DW_AT_external
+ .byte 8 // Abbrev [8] 0xa4:0xe DW_TAG_variable
+ .byte 2 // DW_AT_location
+ .byte 145
+ .byte 124
+ .word .Linfo_string12 // DW_AT_name
+ .byte 1 // DW_AT_decl_file
+ .byte 12 // DW_AT_decl_line
+ .word 60 // DW_AT_type
+ .byte 9 // Abbrev [9] 0xb2:0xd DW_TAG_GNU_call_site
+ .word 42 // DW_AT_abstract_origin
+ .xword .Ltmp4 // DW_AT_low_pc
+ .byte 0 // End Of Children Mark
+ .byte 7 // Abbrev [7] 0xc0:0x3f DW_TAG_subprogram
+ .xword .Lfunc_begin2 // DW_AT_low_pc
+ .word .Lfunc_end2-.Lfunc_begin2 // DW_AT_high_pc
+ .byte 1 // DW_AT_frame_base
+ .byte 109
+ // DW_AT_GNU_all_call_sites
+ .word .Linfo_string9 // DW_AT_name
+ .byte 1 // DW_AT_decl_file
+ .byte 16 // DW_AT_decl_line
+ // DW_AT_external
+ .byte 10 // Abbrev [10] 0xd5:0xf DW_TAG_variable
+ .word .Ldebug_loc0 // DW_AT_location
+ .word .Linfo_string12 // DW_AT_name
+ .byte 1 // DW_AT_decl_file
+ .byte 17 // DW_AT_decl_line
+ .word 60 // DW_AT_type
+ .byte 9 // Abbrev [9] 0xe4:0xd DW_TAG_GNU_call_site
+ .word 42 // DW_AT_abstract_origin
+ .xword .Ltmp7 // DW_AT_low_pc
+ .byte 9 // Abbrev [9] 0xf1:0xd DW_TAG_GNU_call_site
+ .word 67 // DW_AT_abstract_origin
+ .xword .Ltmp9 // DW_AT_low_pc
+ .byte 0 // End Of Children Mark
+ .byte 7 // Abbrev [7] 0xff:0x3f DW_TAG_subprogram
+ .xword .Lfunc_begin3 // DW_AT_low_pc
+ .word .Lfunc_end3-.Lfunc_begin3 // DW_AT_high_pc
+ .byte 1 // DW_AT_frame_base
+ .byte 109
+ // DW_AT_GNU_all_call_sites
+ .word .Linfo_string10 // DW_AT_name
+ .byte 1 // DW_AT_decl_file
+ .byte 22 // DW_AT_decl_line
+ // DW_AT_external
+ .byte 10 // Abbrev [10] 0x114:0xf DW_TAG_variable
+ .word .Ldebug_loc1 // DW_AT_location
+ .word .Linfo_string12 // DW_AT_name
+ .byte 1 // DW_AT_decl_file
+ .byte 23 // DW_AT_decl_line
+ .word 60 // DW_AT_type
+ .byte 9 // Abbrev [9] 0x123:0xd DW_TAG_GNU_call_site
+ .word 42 // DW_AT_abstract_origin
+ .xword .Ltmp13 // DW_AT_low_pc
+ .byte 9 // Abbrev [9] 0x130:0xd DW_TAG_GNU_call_site
+ .word 67 // DW_AT_abstract_origin
+ .xword .Ltmp15 // DW_AT_low_pc
+ .byte 0 // End Of Children Mark
+ .byte 7 // Abbrev [7] 0x13e:0x3f DW_TAG_subprogram
+ .xword .Lfunc_begin4 // DW_AT_low_pc
+ .word .Lfunc_end4-.Lfunc_begin4 // DW_AT_high_pc
+ .byte 1 // DW_AT_frame_base
+ .byte 109
+ // DW_AT_GNU_all_call_sites
+ .word .Linfo_string11 // DW_AT_name
+ .byte 1 // DW_AT_decl_file
+ .byte 28 // DW_AT_decl_line
+ // DW_AT_external
+ .byte 10 // Abbrev [10] 0x153:0xf DW_TAG_variable
+ .word .Ldebug_loc2 // DW_AT_location
+ .word .Linfo_string12 // DW_AT_name
+ .byte 1 // DW_AT_decl_file
+ .byte 29 // DW_AT_decl_line
+ .word 60 // DW_AT_type
+ .byte 9 // Abbrev [9] 0x162:0xd DW_TAG_GNU_call_site
+ .word 80 // DW_AT_abstract_origin
+ .xword .Ltmp18 // DW_AT_low_pc
+ .byte 9 // Abbrev [9] 0x16f:0xd DW_TAG_GNU_call_site
+ .word 67 // DW_AT_abstract_origin
+ .xword .Ltmp20 // DW_AT_low_pc
+ .byte 0 // End Of Children Mark
+ .byte 0 // End Of Children Mark
+.Ldebug_info_end0:
+ .ident "clang version 10.0.0 (git at github.com:llvm/llvm-project.git 5d25e153457e7bdd4181ab7496402a565a5b9370)"
+ .section ".note.GNU-stack","", at progbits
+ .section .debug_line,"", at progbits
+.Lline_table_start0:
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