[llvm] 3cbc4c4 - llvm-dwarfdump: Rebuild type names in dwo type units

David Blaikie via llvm-commits llvm-commits at lists.llvm.org
Thu Nov 18 14:12:58 PST 2021


Author: David Blaikie
Date: 2021-11-18T14:12:48-08:00
New Revision: 3cbc4c487aa253daaa2b4c344022564f8ee3297d

URL: https://github.com/llvm/llvm-project/commit/3cbc4c487aa253daaa2b4c344022564f8ee3297d
DIFF: https://github.com/llvm/llvm-project/commit/3cbc4c487aa253daaa2b4c344022564f8ee3297d.diff

LOG: llvm-dwarfdump: Rebuild type names in dwo type units

Added: 
    llvm/test/tools/llvm-dwarfdump/X86/prettyprint_type_units_split_v4.s
    llvm/test/tools/llvm-dwarfdump/X86/prettyprint_type_units_split_v5.s

Modified: 
    llvm/include/llvm/DebugInfo/DWARF/DWARFContext.h
    llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
    llvm/lib/DebugInfo/DWARF/DWARFDie.cpp
    llvm/test/tools/llvm-dwarfdump/X86/prettyprint_type_units.s

Removed: 
    


################################################################################
diff  --git a/llvm/include/llvm/DebugInfo/DWARF/DWARFContext.h b/llvm/include/llvm/DebugInfo/DWARF/DWARFContext.h
index 3ece8a14061ed..902973ff57228 100644
--- a/llvm/include/llvm/DebugInfo/DWARF/DWARFContext.h
+++ b/llvm/include/llvm/DebugInfo/DWARF/DWARFContext.h
@@ -243,7 +243,7 @@ class DWARFContext : public DIContext {
   }
 
   DWARFCompileUnit *getDWOCompileUnitForHash(uint64_t Hash);
-  DWARFTypeUnit *getTypeUnitForHash(uint16_t Version, uint64_t Hash);
+  DWARFTypeUnit *getTypeUnitForHash(uint16_t Version, uint64_t Hash, bool IsDWO);
 
   /// Return the compile unit that includes an offset (relative to .debug_info).
   DWARFCompileUnit *getCompileUnitForOffset(uint64_t Offset);

diff  --git a/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp b/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
index 188bc6bbb58f7..c8331487f2821 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
@@ -693,24 +693,15 @@ void DWARFContext::dump(
     getDebugNames().dump(OS);
 }
 
-DWARFTypeUnit *DWARFContext::getTypeUnitForHash(uint16_t Version,
-                                                uint64_t Hash) {
-  // FIXME: Include support for Split DWARF here
-  parseNormalUnits();
-
-  auto IsTypeWithHash = [&](const std::unique_ptr<DWARFUnit> &Unit) {
-    DWARFTypeUnit *TU = dyn_cast<DWARFTypeUnit>(Unit.get());
-    if (!TU)
-      return false;
-    return TU->getTypeHash() == Hash;
-  };
-  auto I = llvm::find_if(types_section_units(), IsTypeWithHash);
-  if (I != types_section_units().end())
-    return cast<DWARFTypeUnit>(I->get());
-  // Search normal .debug_info units in case it's a DWARFv5 type unit.
-  I = llvm::find_if(normal_units(), IsTypeWithHash);
-  if (I != types_section_units().end())
-    return cast<DWARFTypeUnit>(I->get());
+DWARFTypeUnit *DWARFContext::getTypeUnitForHash(uint16_t Version, uint64_t Hash,
+                                                bool IsDWO) {
+  // FIXME: Check for/use the tu_index here, if there is one.
+  for (const auto &U : IsDWO ? dwo_units() : normal_units()) {
+    if (DWARFTypeUnit *TU = dyn_cast<DWARFTypeUnit>(U.get())) {
+      if (TU->getTypeHash() == Hash)
+        return TU;
+    }
+  }
   return nullptr;
 }
 

diff  --git a/llvm/lib/DebugInfo/DWARF/DWARFDie.cpp b/llvm/lib/DebugInfo/DWARF/DWARFDie.cpp
index 8be8f6ac18ae0..ed50f2635738c 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFDie.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFDie.cpp
@@ -891,8 +891,8 @@ DWARFDie::getAttributeValueAsReferencedDie(const DWARFFormValue &V) const {
 DWARFDie DWARFDie::resolveTypeUnitReference() const {
   if (auto Attr = find(DW_AT_signature)) {
     if (Optional<uint64_t> Sig = Attr->getAsReferenceUVal()) {
-      if (DWARFTypeUnit *TU =
-              U->getContext().getTypeUnitForHash(U->getVersion(), *Sig))
+      if (DWARFTypeUnit *TU = U->getContext().getTypeUnitForHash(
+              U->getVersion(), *Sig, U->isDWOUnit()))
         return TU->getDIEForOffset(TU->getTypeOffset() + TU->getOffset());
     }
   }

diff  --git a/llvm/test/tools/llvm-dwarfdump/X86/prettyprint_type_units.s b/llvm/test/tools/llvm-dwarfdump/X86/prettyprint_type_units.s
index 3b19fda88f61d..aad748a301e6b 100644
--- a/llvm/test/tools/llvm-dwarfdump/X86/prettyprint_type_units.s
+++ b/llvm/test/tools/llvm-dwarfdump/X86/prettyprint_type_units.s
@@ -21,9 +21,9 @@
 
 
 # CHECK: DW_TAG_template_type_parameter
-# CHECK:   DW_AT_type (0x00000058 "t1")
+# CHECK:   DW_AT_type ({{.*}} "t1")
 # CHECK: DW_TAG_template_type_parameter
-# CHECK:   DW_AT_type (0x00000061 "t2")
+# CHECK:   DW_AT_type ({{.*}} "t2")
 
 	.text
 	.file	"test.cpp"

diff  --git a/llvm/test/tools/llvm-dwarfdump/X86/prettyprint_type_units_split_v4.s b/llvm/test/tools/llvm-dwarfdump/X86/prettyprint_type_units_split_v4.s
new file mode 100644
index 0000000000000..e8bb951750873
--- /dev/null
+++ b/llvm/test/tools/llvm-dwarfdump/X86/prettyprint_type_units_split_v4.s
@@ -0,0 +1,243 @@
+# RUN: llvm-mc < %s -filetype obj -triple x86_64 -o - \
+# RUN:   | llvm-dwarfdump - | FileCheck %s
+
+# Generated from:
+#
+#   struct t1 { };
+#   t1 v1;
+#
+# $ clang++ -S -g -fdebug-types-section -gsplit-dwarf -o test.5.split.s -gdwarf-5 -g
+
+# CHECK: DW_TAG_variable
+# CHECK:   DW_AT_type ({{.*}} "t1")
+
+	.text
+	.file	"test.cpp"
+	.section	.debug_types.dwo,"e", at progbits
+	.long	.Ldebug_info_dwo_end0-.Ldebug_info_dwo_start0 # Length of Unit
+.Ldebug_info_dwo_start0:
+	.short	4                               # DWARF version number
+	.long	0                               # Offset Into Abbrev. Section
+	.byte	8                               # Address Size (in bytes)
+	.quad	-4149699470930386446            # Type Signature
+	.long	30                              # Type DIE Offset
+	.byte	1                               # Abbrev [1] 0x17:0xe DW_TAG_type_unit
+	.short	33                              # DW_AT_language
+	.long	0                               # DW_AT_stmt_list
+	.byte	2                               # Abbrev [2] 0x1e:0x6 DW_TAG_structure_type
+	.byte	5                               # DW_AT_calling_convention
+	.byte	1                               # DW_AT_name
+	.byte	1                               # DW_AT_byte_size
+	.byte	1                               # DW_AT_decl_file
+	.byte	1                               # DW_AT_decl_line
+	.byte	0                               # End Of Children Mark
+.Ldebug_info_dwo_end0:
+	.file	1 "/usr/local/google/home/blaikie/dev/scratch" "test.cpp"
+	.type	v1, at object                      # @v1
+	.bss
+	.globl	v1
+v1:
+	.zero	1
+	.size	v1, 1
+
+	.section	.debug_abbrev,"", at progbits
+	.byte	1                               # Abbreviation Code
+	.byte	17                              # DW_TAG_compile_unit
+	.byte	0                               # DW_CHILDREN_no
+	.byte	16                              # DW_AT_stmt_list
+	.byte	23                              # DW_FORM_sec_offset
+	.byte	27                              # DW_AT_comp_dir
+	.byte	14                              # DW_FORM_strp
+	.ascii	"\264B"                         # DW_AT_GNU_pubnames
+	.byte	25                              # DW_FORM_flag_present
+	.ascii	"\260B"                         # DW_AT_GNU_dwo_name
+	.byte	14                              # DW_FORM_strp
+	.ascii	"\261B"                         # DW_AT_GNU_dwo_id
+	.byte	7                               # DW_FORM_data8
+	.ascii	"\263B"                         # DW_AT_GNU_addr_base
+	.byte	23                              # DW_FORM_sec_offset
+	.byte	0                               # EOM(1)
+	.byte	0                               # EOM(2)
+	.byte	0                               # EOM(3)
+	.section	.debug_info,"", at progbits
+.Lcu_begin0:
+	.long	.Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
+.Ldebug_info_start0:
+	.short	4                               # DWARF version number
+	.long	.debug_abbrev                   # Offset Into Abbrev. Section
+	.byte	8                               # Address Size (in bytes)
+	.byte	1                               # Abbrev [1] 0xb:0x19 DW_TAG_compile_unit
+	.long	.Lline_table_start0             # DW_AT_stmt_list
+	.long	.Lskel_string0                  # DW_AT_comp_dir
+                                        # DW_AT_GNU_pubnames
+	.long	.Lskel_string1                  # DW_AT_GNU_dwo_name
+	.quad	5272896739482311860             # DW_AT_GNU_dwo_id
+	.long	.Laddr_table_base0              # DW_AT_GNU_addr_base
+.Ldebug_info_end0:
+	.section	.debug_str,"MS", at progbits,1
+.Lskel_string0:
+	.asciz	"/usr/local/google/home/blaikie/dev/scratch" # string offset=0
+.Lskel_string1:
+	.asciz	"test.dwo"                      # string offset=43
+	.section	.debug_str.dwo,"eMS", at progbits,1
+.Linfo_string0:
+	.asciz	"v1"                            # string offset=0
+.Linfo_string1:
+	.asciz	"t1"                            # string offset=3
+.Linfo_string2:
+	.asciz	"clang version 14.0.0 (git at github.com:llvm/llvm-project.git c9e46219f38da5c3fbfe41012173dc893516826e)" # string offset=6
+.Linfo_string3:
+	.asciz	"test.cpp"                      # string offset=107
+.Linfo_string4:
+	.asciz	"test.dwo"                      # string offset=116
+	.section	.debug_str_offsets.dwo,"e", at progbits
+	.long	0
+	.long	3
+	.long	6
+	.long	107
+	.long	116
+	.section	.debug_info.dwo,"e", at progbits
+	.long	.Ldebug_info_dwo_end1-.Ldebug_info_dwo_start1 # Length of Unit
+.Ldebug_info_dwo_start1:
+	.short	4                               # DWARF version number
+	.long	0                               # Offset Into Abbrev. Section
+	.byte	8                               # Address Size (in bytes)
+	.byte	3                               # Abbrev [3] 0xb:0x23 DW_TAG_compile_unit
+	.byte	2                               # DW_AT_producer
+	.short	33                              # DW_AT_language
+	.byte	3                               # DW_AT_name
+	.byte	4                               # DW_AT_GNU_dwo_name
+	.quad	5272896739482311860             # DW_AT_GNU_dwo_id
+	.byte	4                               # Abbrev [4] 0x19:0xb DW_TAG_variable
+	.byte	0                               # DW_AT_name
+	.long	36                              # DW_AT_type
+                                        # DW_AT_external
+	.byte	1                               # DW_AT_decl_file
+	.byte	2                               # DW_AT_decl_line
+	.byte	2                               # DW_AT_location
+	.byte	251
+	.byte	0
+	.byte	5                               # Abbrev [5] 0x24:0x9 DW_TAG_structure_type
+                                        # DW_AT_declaration
+	.quad	-4149699470930386446            # DW_AT_signature
+	.byte	0                               # End Of Children Mark
+.Ldebug_info_dwo_end1:
+	.section	.debug_abbrev.dwo,"e", at 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	0                               # EOM(1)
+	.byte	0                               # EOM(2)
+	.byte	2                               # 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
+	.ascii	"\202>"                         # DW_FORM_GNU_str_index
+	.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	3                               # Abbreviation Code
+	.byte	17                              # DW_TAG_compile_unit
+	.byte	1                               # DW_CHILDREN_yes
+	.byte	37                              # DW_AT_producer
+	.ascii	"\202>"                         # DW_FORM_GNU_str_index
+	.byte	19                              # DW_AT_language
+	.byte	5                               # DW_FORM_data2
+	.byte	3                               # DW_AT_name
+	.ascii	"\202>"                         # DW_FORM_GNU_str_index
+	.ascii	"\260B"                         # DW_AT_GNU_dwo_name
+	.ascii	"\202>"                         # DW_FORM_GNU_str_index
+	.ascii	"\261B"                         # DW_AT_GNU_dwo_id
+	.byte	7                               # DW_FORM_data8
+	.byte	0                               # EOM(1)
+	.byte	0                               # EOM(2)
+	.byte	4                               # Abbreviation Code
+	.byte	52                              # DW_TAG_variable
+	.byte	0                               # DW_CHILDREN_no
+	.byte	3                               # DW_AT_name
+	.ascii	"\202>"                         # DW_FORM_GNU_str_index
+	.byte	73                              # DW_AT_type
+	.byte	19                              # DW_FORM_ref4
+	.byte	63                              # DW_AT_external
+	.byte	25                              # DW_FORM_flag_present
+	.byte	58                              # DW_AT_decl_file
+	.byte	11                              # DW_FORM_data1
+	.byte	59                              # DW_AT_decl_line
+	.byte	11                              # DW_FORM_data1
+	.byte	2                               # DW_AT_location
+	.byte	24                              # DW_FORM_exprloc
+	.byte	0                               # EOM(1)
+	.byte	0                               # EOM(2)
+	.byte	5                               # Abbreviation Code
+	.byte	19                              # DW_TAG_structure_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	0                               # EOM(3)
+	.section	.debug_line.dwo,"e", at progbits
+.Ltmp0:
+	.long	.Ldebug_line_end0-.Ldebug_line_start0 # unit length
+.Ldebug_line_start0:
+	.short	4
+	.long	.Lprologue_end0-.Lprologue_start0
+.Lprologue_start0:
+	.byte	1
+	.byte	1
+	.byte	1
+	.byte	-5
+	.byte	14
+	.byte	1
+	.byte	0
+	.ascii	"test.cpp"
+	.byte	0
+	.byte	0
+	.byte	0
+	.byte	0
+	.byte	0
+.Lprologue_end0:
+.Ldebug_line_end0:
+	.section	.debug_addr,"", at progbits
+.Laddr_table_base0:
+	.quad	v1
+	.section	.debug_gnu_pubnames,"", at progbits
+	.long	.LpubNames_end0-.LpubNames_start0 # Length of Public Names Info
+.LpubNames_start0:
+	.short	2                               # DWARF Version
+	.long	.Lcu_begin0                     # Offset of Compilation Unit Info
+	.long	36                              # Compilation Unit Length
+	.long	25                              # DIE offset
+	.byte	32                              # Attributes: VARIABLE, EXTERNAL
+	.asciz	"v1"                            # External Name
+	.long	0                               # End Mark
+.LpubNames_end0:
+	.section	.debug_gnu_pubtypes,"", at progbits
+	.long	.LpubTypes_end0-.LpubTypes_start0 # Length of Public Types Info
+.LpubTypes_start0:
+	.short	2                               # DWARF Version
+	.long	.Lcu_begin0                     # Offset of Compilation Unit Info
+	.long	36                              # Compilation Unit Length
+	.long	36                              # DIE offset
+	.byte	16                              # Attributes: TYPE, EXTERNAL
+	.asciz	"t1"                            # External Name
+	.long	0                               # End Mark
+.LpubTypes_end0:
+	.ident	"clang version 14.0.0 (git at github.com:llvm/llvm-project.git c9e46219f38da5c3fbfe41012173dc893516826e)"
+	.section	".note.GNU-stack","", at progbits
+	.addrsig
+	.section	.debug_line,"", at progbits
+.Lline_table_start0:

diff  --git a/llvm/test/tools/llvm-dwarfdump/X86/prettyprint_type_units_split_v5.s b/llvm/test/tools/llvm-dwarfdump/X86/prettyprint_type_units_split_v5.s
new file mode 100644
index 0000000000000..e8bb951750873
--- /dev/null
+++ b/llvm/test/tools/llvm-dwarfdump/X86/prettyprint_type_units_split_v5.s
@@ -0,0 +1,243 @@
+# RUN: llvm-mc < %s -filetype obj -triple x86_64 -o - \
+# RUN:   | llvm-dwarfdump - | FileCheck %s
+
+# Generated from:
+#
+#   struct t1 { };
+#   t1 v1;
+#
+# $ clang++ -S -g -fdebug-types-section -gsplit-dwarf -o test.5.split.s -gdwarf-5 -g
+
+# CHECK: DW_TAG_variable
+# CHECK:   DW_AT_type ({{.*}} "t1")
+
+	.text
+	.file	"test.cpp"
+	.section	.debug_types.dwo,"e", at progbits
+	.long	.Ldebug_info_dwo_end0-.Ldebug_info_dwo_start0 # Length of Unit
+.Ldebug_info_dwo_start0:
+	.short	4                               # DWARF version number
+	.long	0                               # Offset Into Abbrev. Section
+	.byte	8                               # Address Size (in bytes)
+	.quad	-4149699470930386446            # Type Signature
+	.long	30                              # Type DIE Offset
+	.byte	1                               # Abbrev [1] 0x17:0xe DW_TAG_type_unit
+	.short	33                              # DW_AT_language
+	.long	0                               # DW_AT_stmt_list
+	.byte	2                               # Abbrev [2] 0x1e:0x6 DW_TAG_structure_type
+	.byte	5                               # DW_AT_calling_convention
+	.byte	1                               # DW_AT_name
+	.byte	1                               # DW_AT_byte_size
+	.byte	1                               # DW_AT_decl_file
+	.byte	1                               # DW_AT_decl_line
+	.byte	0                               # End Of Children Mark
+.Ldebug_info_dwo_end0:
+	.file	1 "/usr/local/google/home/blaikie/dev/scratch" "test.cpp"
+	.type	v1, at object                      # @v1
+	.bss
+	.globl	v1
+v1:
+	.zero	1
+	.size	v1, 1
+
+	.section	.debug_abbrev,"", at progbits
+	.byte	1                               # Abbreviation Code
+	.byte	17                              # DW_TAG_compile_unit
+	.byte	0                               # DW_CHILDREN_no
+	.byte	16                              # DW_AT_stmt_list
+	.byte	23                              # DW_FORM_sec_offset
+	.byte	27                              # DW_AT_comp_dir
+	.byte	14                              # DW_FORM_strp
+	.ascii	"\264B"                         # DW_AT_GNU_pubnames
+	.byte	25                              # DW_FORM_flag_present
+	.ascii	"\260B"                         # DW_AT_GNU_dwo_name
+	.byte	14                              # DW_FORM_strp
+	.ascii	"\261B"                         # DW_AT_GNU_dwo_id
+	.byte	7                               # DW_FORM_data8
+	.ascii	"\263B"                         # DW_AT_GNU_addr_base
+	.byte	23                              # DW_FORM_sec_offset
+	.byte	0                               # EOM(1)
+	.byte	0                               # EOM(2)
+	.byte	0                               # EOM(3)
+	.section	.debug_info,"", at progbits
+.Lcu_begin0:
+	.long	.Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
+.Ldebug_info_start0:
+	.short	4                               # DWARF version number
+	.long	.debug_abbrev                   # Offset Into Abbrev. Section
+	.byte	8                               # Address Size (in bytes)
+	.byte	1                               # Abbrev [1] 0xb:0x19 DW_TAG_compile_unit
+	.long	.Lline_table_start0             # DW_AT_stmt_list
+	.long	.Lskel_string0                  # DW_AT_comp_dir
+                                        # DW_AT_GNU_pubnames
+	.long	.Lskel_string1                  # DW_AT_GNU_dwo_name
+	.quad	5272896739482311860             # DW_AT_GNU_dwo_id
+	.long	.Laddr_table_base0              # DW_AT_GNU_addr_base
+.Ldebug_info_end0:
+	.section	.debug_str,"MS", at progbits,1
+.Lskel_string0:
+	.asciz	"/usr/local/google/home/blaikie/dev/scratch" # string offset=0
+.Lskel_string1:
+	.asciz	"test.dwo"                      # string offset=43
+	.section	.debug_str.dwo,"eMS", at progbits,1
+.Linfo_string0:
+	.asciz	"v1"                            # string offset=0
+.Linfo_string1:
+	.asciz	"t1"                            # string offset=3
+.Linfo_string2:
+	.asciz	"clang version 14.0.0 (git at github.com:llvm/llvm-project.git c9e46219f38da5c3fbfe41012173dc893516826e)" # string offset=6
+.Linfo_string3:
+	.asciz	"test.cpp"                      # string offset=107
+.Linfo_string4:
+	.asciz	"test.dwo"                      # string offset=116
+	.section	.debug_str_offsets.dwo,"e", at progbits
+	.long	0
+	.long	3
+	.long	6
+	.long	107
+	.long	116
+	.section	.debug_info.dwo,"e", at progbits
+	.long	.Ldebug_info_dwo_end1-.Ldebug_info_dwo_start1 # Length of Unit
+.Ldebug_info_dwo_start1:
+	.short	4                               # DWARF version number
+	.long	0                               # Offset Into Abbrev. Section
+	.byte	8                               # Address Size (in bytes)
+	.byte	3                               # Abbrev [3] 0xb:0x23 DW_TAG_compile_unit
+	.byte	2                               # DW_AT_producer
+	.short	33                              # DW_AT_language
+	.byte	3                               # DW_AT_name
+	.byte	4                               # DW_AT_GNU_dwo_name
+	.quad	5272896739482311860             # DW_AT_GNU_dwo_id
+	.byte	4                               # Abbrev [4] 0x19:0xb DW_TAG_variable
+	.byte	0                               # DW_AT_name
+	.long	36                              # DW_AT_type
+                                        # DW_AT_external
+	.byte	1                               # DW_AT_decl_file
+	.byte	2                               # DW_AT_decl_line
+	.byte	2                               # DW_AT_location
+	.byte	251
+	.byte	0
+	.byte	5                               # Abbrev [5] 0x24:0x9 DW_TAG_structure_type
+                                        # DW_AT_declaration
+	.quad	-4149699470930386446            # DW_AT_signature
+	.byte	0                               # End Of Children Mark
+.Ldebug_info_dwo_end1:
+	.section	.debug_abbrev.dwo,"e", at 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	0                               # EOM(1)
+	.byte	0                               # EOM(2)
+	.byte	2                               # 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
+	.ascii	"\202>"                         # DW_FORM_GNU_str_index
+	.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	3                               # Abbreviation Code
+	.byte	17                              # DW_TAG_compile_unit
+	.byte	1                               # DW_CHILDREN_yes
+	.byte	37                              # DW_AT_producer
+	.ascii	"\202>"                         # DW_FORM_GNU_str_index
+	.byte	19                              # DW_AT_language
+	.byte	5                               # DW_FORM_data2
+	.byte	3                               # DW_AT_name
+	.ascii	"\202>"                         # DW_FORM_GNU_str_index
+	.ascii	"\260B"                         # DW_AT_GNU_dwo_name
+	.ascii	"\202>"                         # DW_FORM_GNU_str_index
+	.ascii	"\261B"                         # DW_AT_GNU_dwo_id
+	.byte	7                               # DW_FORM_data8
+	.byte	0                               # EOM(1)
+	.byte	0                               # EOM(2)
+	.byte	4                               # Abbreviation Code
+	.byte	52                              # DW_TAG_variable
+	.byte	0                               # DW_CHILDREN_no
+	.byte	3                               # DW_AT_name
+	.ascii	"\202>"                         # DW_FORM_GNU_str_index
+	.byte	73                              # DW_AT_type
+	.byte	19                              # DW_FORM_ref4
+	.byte	63                              # DW_AT_external
+	.byte	25                              # DW_FORM_flag_present
+	.byte	58                              # DW_AT_decl_file
+	.byte	11                              # DW_FORM_data1
+	.byte	59                              # DW_AT_decl_line
+	.byte	11                              # DW_FORM_data1
+	.byte	2                               # DW_AT_location
+	.byte	24                              # DW_FORM_exprloc
+	.byte	0                               # EOM(1)
+	.byte	0                               # EOM(2)
+	.byte	5                               # Abbreviation Code
+	.byte	19                              # DW_TAG_structure_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	0                               # EOM(3)
+	.section	.debug_line.dwo,"e", at progbits
+.Ltmp0:
+	.long	.Ldebug_line_end0-.Ldebug_line_start0 # unit length
+.Ldebug_line_start0:
+	.short	4
+	.long	.Lprologue_end0-.Lprologue_start0
+.Lprologue_start0:
+	.byte	1
+	.byte	1
+	.byte	1
+	.byte	-5
+	.byte	14
+	.byte	1
+	.byte	0
+	.ascii	"test.cpp"
+	.byte	0
+	.byte	0
+	.byte	0
+	.byte	0
+	.byte	0
+.Lprologue_end0:
+.Ldebug_line_end0:
+	.section	.debug_addr,"", at progbits
+.Laddr_table_base0:
+	.quad	v1
+	.section	.debug_gnu_pubnames,"", at progbits
+	.long	.LpubNames_end0-.LpubNames_start0 # Length of Public Names Info
+.LpubNames_start0:
+	.short	2                               # DWARF Version
+	.long	.Lcu_begin0                     # Offset of Compilation Unit Info
+	.long	36                              # Compilation Unit Length
+	.long	25                              # DIE offset
+	.byte	32                              # Attributes: VARIABLE, EXTERNAL
+	.asciz	"v1"                            # External Name
+	.long	0                               # End Mark
+.LpubNames_end0:
+	.section	.debug_gnu_pubtypes,"", at progbits
+	.long	.LpubTypes_end0-.LpubTypes_start0 # Length of Public Types Info
+.LpubTypes_start0:
+	.short	2                               # DWARF Version
+	.long	.Lcu_begin0                     # Offset of Compilation Unit Info
+	.long	36                              # Compilation Unit Length
+	.long	36                              # DIE offset
+	.byte	16                              # Attributes: TYPE, EXTERNAL
+	.asciz	"t1"                            # External Name
+	.long	0                               # End Mark
+.LpubTypes_end0:
+	.ident	"clang version 14.0.0 (git at github.com:llvm/llvm-project.git c9e46219f38da5c3fbfe41012173dc893516826e)"
+	.section	".note.GNU-stack","", at progbits
+	.addrsig
+	.section	.debug_line,"", at progbits
+.Lline_table_start0:


        


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