Index: include/llvm/BinaryFormat/Dwarf.h
===================================================================
--- include/llvm/BinaryFormat/Dwarf.h
+++ include/llvm/BinaryFormat/Dwarf.h
@@ -62,6 +62,9 @@
const uint32_t DW_CIE_ID = UINT32_MAX;
const uint64_t DW64_CIE_ID = UINT64_MAX;
+// Identifier of an invalid DIE offset in the .debug_info section.
+const uint32_t DW_INVALID_OFFSET = UINT32_MAX;
+
enum Tag : uint16_t {
#define HANDLE_DW_TAG(ID, NAME, VERSION, VENDOR) DW_TAG_##NAME = ID,
#include "llvm/BinaryFormat/Dwarf.def"
Index: include/llvm/DebugInfo/DWARF/DWARFAcceleratorTable.h
===================================================================
--- include/llvm/DebugInfo/DWARF/DWARFAcceleratorTable.h
+++ include/llvm/DebugInfo/DWARF/DWARFAcceleratorTable.h
@@ -55,6 +55,17 @@
uint32_t getNumHashes();
uint32_t getSizeHdr();
uint32_t getHeaderDataLength();
+ ArrayRef<std::pair<HeaderData::AtomType, HeaderData::Form>> getAtomsDesc();
+
+ /// Return information related to the DWARF DIE we're looking for when
+ /// performing a lookup by name.
+ ///
+ /// \param HashDataOffset an offset into the hash data table
+ /// \returns DIEOffset the offset into the .debug_info section for the DIE
+ /// related to the input hash data offset. Currently this function returns
+ /// only the DIEOffset but it can be modified to return more data regarding
+ /// the DIE
+ uint32_t readAtoms(uint32_t &HashDataOffset);
void dump(raw_ostream &OS) const;
};
Index: lib/DebugInfo/DWARF/DWARFAcceleratorTable.cpp
===================================================================
--- lib/DebugInfo/DWARF/DWARFAcceleratorTable.cpp
+++ lib/DebugInfo/DWARF/DWARFAcceleratorTable.cpp
@@ -62,6 +62,41 @@
return Hdr.HeaderDataLength;
}
+ArrayRef<std::pair<DWARFAcceleratorTable::HeaderData::AtomType,
+ DWARFAcceleratorTable::HeaderData::Form>>
+DWARFAcceleratorTable::getAtomsDesc() {
+ return HdrData.Atoms;
+}
+
+bool isSupportedForm(DWARFFormValue FormValue) {
+ if ((!FormValue.isFormClass(DWARFFormValue::FC_Constant) &&
+ !FormValue.isFormClass(DWARFFormValue::FC_Flag)) ||
+ FormValue.getForm() == dwarf::DW_FORM_sdata)
+ return false;
+ return true;
+}
+
+uint32_t DWARFAcceleratorTable::readAtoms(uint32_t &HashDataOffset) {
+ uint32_t DieOffset = dwarf::DW_INVALID_OFFSET;
+
+ for (auto Atom : getAtomsDesc()) {
+ DWARFFormValue FormValue(Atom.second);
+ if (isSupportedForm(FormValue)) {
+ FormValue.extractValue(AccelSection, &HashDataOffset, NULL);
+ switch (Atom.first) {
+ case dwarf::DW_ATOM_die_offset:
+ DieOffset = *FormValue.getAsUnsignedConstant();
+ break;
+ default:
+ break;
+ }
+ } else {
+ HashDataOffset = dwarf::DW_INVALID_OFFSET;
+ }
+ }
+ return DieOffset;
+}
+
LLVM_DUMP_METHOD void DWARFAcceleratorTable::dump(raw_ostream &OS) const {
// Dump the header.
OS << "Magic = " << format("0x%08x", Hdr.Magic) << '\n'
Index: lib/DebugInfo/DWARF/DWARFVerifier.cpp
===================================================================
--- lib/DebugInfo/DWARF/DWARFVerifier.cpp
+++ lib/DebugInfo/DWARF/DWARFVerifier.cpp
@@ -292,20 +292,81 @@
OS << "Verifying .apple_names...\n";
- // Verify that all buckets have a valid hash index or are empty
+ // Verify that all buckets have a valid hash index or are empty.
uint32_t NumBuckets = AppleNames.getNumBuckets();
uint32_t NumHashes = AppleNames.getNumHashes();
uint32_t BucketsOffset =
AppleNames.getSizeHdr() + AppleNames.getHeaderDataLength();
+ uint32_t HashesBase = BucketsOffset + NumBuckets * 4;
+ uint32_t OffsetsBase = HashesBase + NumHashes * 4;
for (uint32_t BucketIdx = 0; BucketIdx < NumBuckets; ++BucketIdx) {
uint32_t HashIdx = AppleNamesSection.getU32(&BucketsOffset);
if (HashIdx >= NumHashes && HashIdx != UINT32_MAX) {
- OS << format("error: Bucket[%d] has invalid hash index: [%d]\n",
- BucketIdx, HashIdx);
+ OS << format("error: Bucket[%d] has invalid hash index: %u\n", BucketIdx,
+ HashIdx);
++NumAppleNamesErrors;
}
}
+
+ uint32_t NumAtoms = AppleNames.getAtomsDesc().size();
+ if (NumAtoms == 0) {
+ OS << "error: no atoms; failed to read HashData\n";
+ ++NumAppleNamesErrors;
+ return false;
+ }
+
+ for (uint32_t HashIdx = 0; HashIdx < NumHashes; ++HashIdx) {
+ uint32_t HashOffset = HashesBase + 4 * HashIdx;
+ uint32_t DataOffset = OffsetsBase + 4 * HashIdx;
+ uint32_t Hash = AppleNamesSection.getU32(&HashOffset);
+ uint32_t HashDataOffset = AppleNamesSection.getU32(&DataOffset);
+ if (!AppleNamesSection.isValidOffsetForDataOfSize(HashDataOffset,
+ sizeof(uint64_t))) {
+ OS << format("error: Hash[%d] has invalid HashData offset: 0x%08x\n",
+ HashIdx, HashDataOffset);
+ ++NumAppleNamesErrors;
+ }
+
+ uint32_t StrpOffset;
+ uint32_t StringOffset;
+ uint32_t StringCount = 0;
+ uint32_t DieOffset = dwarf::DW_INVALID_OFFSET;
+
+ while ((StrpOffset = AppleNamesSection.getU32(&HashDataOffset)) != 0) {
+ const uint32_t NumHashDataObjects =
+ AppleNamesSection.getU32(&HashDataOffset);
+ for (uint32_t HashDataIdx = 0; HashDataIdx < NumHashDataObjects;
+ ++HashDataIdx) {
+ const uint32_t HashDataOffsetStart = HashDataOffset;
+ DieOffset = AppleNames.readAtoms(HashDataOffset);
+ if (HashDataOffset == dwarf::DW_INVALID_OFFSET) {
+ OS << format(
+ "error: unsupported form; failed to read HashData at 0x%08x\n",
+ HashDataOffsetStart);
+ ++NumAppleNamesErrors;
+ return false;
+ } else if (!DCtx.getDIEForOffset(DieOffset)) {
+ const uint32_t BucketIdx =
+ NumBuckets ? (Hash % NumBuckets) : UINT32_MAX;
+ StringOffset = StrpOffset;
+ const char *Name = StrData.getCStr(&StringOffset);
+ if (!Name)
+ Name = "<NULL>";
+
+ OS << format(
+ "error: .apple_names Bucket[%d] Hash[%d] = 0x%08x "
+ "Str[%u] = 0x%08x "
+ "DIE[%d] = 0x%08x is not a valid DIE offset for \"%s\".\n",
+ BucketIdx, HashIdx, Hash, StringCount, StrpOffset, HashDataIdx,
+ DieOffset, Name);
+
+ ++NumAppleNamesErrors;
+ }
+ }
+ ++StringCount;
+ }
+ }
return NumAppleNamesErrors == 0;
}
Index: test/tools/llvm-dwarfdump/X86/apple_names.test
===================================================================
--- /dev/null
+++ test/tools/llvm-dwarfdump/X86/apple_names.test
@@ -0,0 +1,5 @@
+RUN: llvm-dwarfdump -verify %p/../../../DebugInfo/Inputs/dwarfdump-objc.x86_64.o \
+RUN: | FileCheck %s
+
+CHECK: Verifying .apple_names
+CHECK-NEXT: No errors.
Index: test/tools/llvm-dwarfdump/X86/apple_names_verify_atoms.s
===================================================================
--- /dev/null
+++ test/tools/llvm-dwarfdump/X86/apple_names_verify_atoms.s
@@ -0,0 +1,59 @@
+# RUN: llvm-mc %s -filetype obj -triple x86_64-apple-darwin -o - \
+# RUN: | not llvm-dwarfdump -verify - \
+# RUN: | FileCheck %s
+
+# CHECK: Verifying .apple_names...
+# CHECK-NEXT: error: no atoms; failed to read HashData
+
+# This test is meant to verify that the -verify option
+# in llvm-dwarfdump, correctly identifies that there is not Atom.
+# As a result, the hashdata cannot be read.
+
+ .section __TEXT,__text,regular,pure_instructions
+ .file 1 "basic.c"
+ .comm _i,4,2 ## @i
+ .comm _j,4,2 ## @j
+ .section __DWARF,__debug_str,regular,debug
+Linfo_string:
+ .asciz "Apple LLVM version 8.1.0 (clang-802.0.35)" ## string offset=0
+ .asciz "basic.c" ## string offset=42
+ .asciz "/Users/sgravani/Development/tests" ## string offset=50
+ .asciz "i" ## string offset=84
+ .asciz "int" ## string offset=86
+ .asciz "j" ## string offset=90
+
+ .section __DWARF,__debug_info,regular,debug
+Lsection_info:
+ .section __DWARF,__apple_names,regular,debug
+Lnames_begin:
+ .long 1212240712 ## Header Magic
+ .short 1 ## Header Version
+ .short 0 ## Header Hash Function
+ .long 2 ## Header Bucket Count
+ .long 2 ## Header Hash Count
+ .long 12 ## Header Data Length
+ .long 0 ## HeaderData Die Offset Base
+ .long 0 ## HeaderData Atom Count -- error: no atoms; failed to read HashData
+ .short 1 ## DW_ATOM_die_offset
+ .short 6 ## DW_FORM_data4
+ .long 0 ## Bucket 0
+ .long 1 ## Bucket 1
+ .long 177678 ## Hash in Bucket 0
+ .long 177679 ## Hash in Bucket 1
+ .long LNames0-Lnames_begin ## Offset in Bucket 0
+ .long LNames1-Lnames_begin ## Offset in Bucket 1
+LNames0:
+ .long 84 ## i
+ .long 1 ## Num DIEs
+ .long 30
+ .long 0
+LNames1:
+ .long 90 ## j
+ .long 1 ## Num DIEs
+ .long 58
+ .long 0
+
+.subsections_via_symbols
+ .section __DWARF,__debug_line,regular,debug
+Lsection_line:
+Lline_table_start0:
Index: test/tools/llvm-dwarfdump/X86/apple_names_verify_buckets.s
===================================================================
--- test/tools/llvm-dwarfdump/X86/apple_names_verify_buckets.s
+++ /dev/null
@@ -1,192 +0,0 @@
-# RUN: llvm-mc %s -filetype obj -triple x86_64-apple-darwin -o - \
-# RUN: | not llvm-dwarfdump -verify - \
-# RUN: | FileCheck %s
-
-# CHECK: Verifying .apple_names...
-# CHECK-NEXT: error: Bucket[0] has invalid hash index: [-2]
-
-# This test is meant to verify that the -verify option
-# in llvm-dwarfdump, correctly identifies
-# an invalid hash index for bucket[0] in the .apple_names section.
-
- .section __TEXT,__text,regular,pure_instructions
- .file 1 "basic.c"
- .comm _i,4,2 ## @i
- .section __DWARF,__debug_str,regular,debug
-Linfo_string:
- .asciz "basic.c" ## string offset=42
- .asciz "i" ## string offset=84
- .asciz "int" ## string offset=86
- .section __DWARF,__debug_loc,regular,debug
-Lsection_debug_loc:
- .section __DWARF,__debug_abbrev,regular,debug
-Lsection_abbrev:
- .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 0 ## EOM(1)
- .byte 0 ## EOM(2)
- .byte 2 ## Abbreviation Code
- .byte 52 ## DW_TAG_variable
- .byte 0 ## DW_CHILDREN_no
- .byte 3 ## DW_AT_name
- .byte 14 ## DW_FORM_strp
- .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 3 ## 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 0 ## EOM(3)
- .section __DWARF,__debug_info,regular,debug
-Lsection_info:
-Lcu_begin0:
- .long 55 ## Length of Unit
- .short 4 ## DWARF version number
-Lset0 = Lsection_abbrev-Lsection_abbrev ## Offset Into Abbrev. Section
- .long Lset0
- .byte 8 ## Address Size (in bytes)
- .byte 1 ## Abbrev [1] 0xb:0x30 DW_TAG_compile_unit
- .long 0 ## DW_AT_producer
- .short 12 ## DW_AT_language
- .long 42 ## DW_AT_name
-Lset1 = Lline_table_start0-Lsection_line ## DW_AT_stmt_list
- .long Lset1
- .long 50 ## DW_AT_comp_dir
- .byte 2 ## Abbrev [2] 0x1e:0x15 DW_TAG_variable
- .long 84 ## DW_AT_name
- .long 51 ## DW_AT_type
- ## DW_AT_external
- .byte 1 ## DW_AT_decl_file
- .byte 1 ## DW_AT_decl_line
- .byte 9 ## DW_AT_location
- .byte 3
- .quad _i
- .byte 3 ## Abbrev [3] 0x33:0x7 DW_TAG_base_type
- .long 86 ## DW_AT_name
- .byte 5 ## DW_AT_encoding
- .byte 4 ## DW_AT_byte_size
- .byte 0 ## End Of Children Mark
- .section __DWARF,__debug_ranges,regular,debug
-Ldebug_range:
- .section __DWARF,__debug_macinfo,regular,debug
-Ldebug_macinfo:
-Lcu_macro_begin0:
- .byte 0 ## End Of Macro List Mark
- .section __DWARF,__apple_names,regular,debug
-Lnames_begin:
- .long 1212240712 ## Header Magic
- .short 1 ## Header Version
- .short 0 ## Header Hash Function
- .long 1 ## Header Bucket Count
- .long 1 ## Header Hash Count
- .long 12 ## Header Data Length
- .long 0 ## HeaderData Die Offset Base
- .long 1 ## HeaderData Atom Count
- .short 1 ## DW_ATOM_die_offset
- .short 6 ## DW_FORM_data4
- .long -2 ## Bucket 0 -- error: Bucket[0] has invalid hash index: [-2]
- .long 177678 ## Hash in Bucket 0
- .long LNames0-Lnames_begin ## Offset in Bucket 0
-LNames0:
- .long 84 ## i
- .long 1 ## Num DIEs
- .long 30
- .long 0
- .section __DWARF,__apple_objc,regular,debug
-Lobjc_begin:
- .long 1212240712 ## Header Magic
- .short 1 ## Header Version
- .short 0 ## Header Hash Function
- .long 1 ## Header Bucket Count
- .long 0 ## Header Hash Count
- .long 12 ## Header Data Length
- .long 0 ## HeaderData Die Offset Base
- .long 1 ## HeaderData Atom Count
- .short 1 ## DW_ATOM_die_offset
- .short 6 ## DW_FORM_data4
- .long -1 ## Bucket 0
- .section __DWARF,__apple_namespac,regular,debug
-Lnamespac_begin:
- .long 1212240712 ## Header Magic
- .short 1 ## Header Version
- .short 0 ## Header Hash Function
- .long 1 ## Header Bucket Count
- .long 0 ## Header Hash Count
- .long 12 ## Header Data Length
- .long 0 ## HeaderData Die Offset Base
- .long 1 ## HeaderData Atom Count
- .short 1 ## DW_ATOM_die_offset
- .short 6 ## DW_FORM_data4
- .long -1 ## Bucket 0
- .section __DWARF,__apple_types,regular,debug
-Ltypes_begin:
- .long 1212240712 ## Header Magic
- .short 1 ## Header Version
- .short 0 ## Header Hash Function
- .long 1 ## Header Bucket Count
- .long 1 ## Header Hash Count
- .long 20 ## Header Data Length
- .long 0 ## HeaderData Die Offset Base
- .long 3 ## HeaderData Atom Count
- .short 1 ## DW_ATOM_die_offset
- .short 6 ## DW_FORM_data4
- .short 3 ## DW_ATOM_die_tag
- .short 5 ## DW_FORM_data2
- .short 4 ## DW_ATOM_type_flags
- .short 11 ## DW_FORM_data1
- .long 0 ## Bucket 0
- .long 193495088 ## Hash in Bucket 0
- .long Ltypes0-Ltypes_begin ## Offset in Bucket 0
-Ltypes0:
- .long 86 ## int
- .long 1 ## Num DIEs
- .long 51
- .short 36
- .byte 0
- .long 0
- .section __DWARF,__apple_exttypes,regular,debug
-Lexttypes_begin:
- .long 1212240712 ## Header Magic
- .short 1 ## Header Version
- .short 0 ## Header Hash Function
- .long 1 ## Header Bucket Count
- .long 0 ## Header Hash Count
- .long 12 ## Header Data Length
- .long 0 ## HeaderData Die Offset Base
- .long 1 ## HeaderData Atom Count
- .short 7 ## DW_ATOM_ext_types
- .short 6 ## DW_FORM_data4
- .long -1 ## Bucket 0
-
-.subsections_via_symbols
- .section __DWARF,__debug_line,regular,debug
-Lsection_line:
-Lline_table_start0:
Index: test/tools/llvm-dwarfdump/X86/apple_names_verify_data.s
===================================================================
--- /dev/null
+++ test/tools/llvm-dwarfdump/X86/apple_names_verify_data.s
@@ -0,0 +1,64 @@
+# RUN: llvm-mc %s -filetype obj -triple x86_64-apple-darwin -o - \
+# RUN: | not llvm-dwarfdump -verify - \
+# RUN: | FileCheck %s
+
+# CHECK: Verifying .apple_names...
+# CHECK-NEXT: error: Bucket[0] has invalid hash index: 4294967294
+# CHECK-NEXT: error: Hash[0] has invalid HashData offset: 0x000000b4
+# CHECK-NEXT: error: .apple_names Bucket[1] Hash[1] = 0x0002b60f Str[0] = 0x0000005a DIE[0] = 0x00000001 is not a valid DIE offset for "j".
+
+# This test is meant to verify that the -verify option
+# in llvm-dwarfdump, correctly identifies
+# an invalid hash index for bucket[0] in the .apple_names section,
+# an invalid HashData offset for Hash[0], as well as
+# an invalid DIE offset in the .debug_info section.
+# We're reading an invalid DIE due to the incorrect interpretation of DW_FORM for the DIE.
+# Instead of DW_FORM_data4 the Atom[0].form is: DW_FORM_flag_present.
+
+ .section __TEXT,__text,regular,pure_instructions
+ .file 1 "basic.c"
+ .comm _i,4,2 ## @i
+ .comm _j,4,2 ## @j
+ .section __DWARF,__debug_str,regular,debug
+Linfo_string:
+ .asciz "Apple LLVM version 8.1.0 (clang-802.0.35)" ## string offset=0
+ .asciz "basic.c" ## string offset=42
+ .asciz "/Users/sgravani/Development/tests" ## string offset=50
+ .asciz "i" ## string offset=84
+ .asciz "int" ## string offset=86
+ .asciz "j" ## string offset=90
+ .section __DWARF,__debug_info,regular,debug
+Lsection_info:
+ .section __DWARF,__apple_names,regular,debug
+Lnames_begin:
+ .long 1212240712 ## Header Magic
+ .short 1 ## Header Version
+ .short 0 ## Header Hash Function
+ .long 2 ## Header Bucket Count
+ .long 2 ## Header Hash Count
+ .long 12 ## Header Data Length
+ .long 0 ## HeaderData Die Offset Base
+ .long 1 ## HeaderData Atom Count
+ .short 1 ## DW_ATOM_die_offset
+ .short 25 ## DW_FORM_data4 -- error: .apple_names Bucket[1] Hash[1] = 0x0002b60f Str[0] = 0x0000005a DIE[0] = 0x00000001 is not a valid DIE offset for "j".
+ .long -2 ## Bucket 0 -- error: Bucket[0] has invalid hash index: 4294967294
+ .long 1 ## Bucket 1
+ .long 177678 ## Hash in Bucket 0
+ .long 177679 ## Hash in Bucket 1
+ .long Lsection_line ## Offset in Bucket 0 -- error: Hash[0] has invalid HashData offset: 0x000000b4
+ .long LNames1-Lnames_begin ## Offset in Bucket 1
+LNames0:
+ .long 84 ## i
+ .long 1 ## Num DIEs
+ .long 30
+ .long 0
+LNames1:
+ .long 90 ## j
+ .long 1 ## Num DIEs
+ .long 58
+ .long 0
+
+.subsections_via_symbols
+ .section __DWARF,__debug_line,regular,debug
+Lsection_line:
+Lline_table_start0:
Index: test/tools/llvm-dwarfdump/X86/apple_names_verify_form.s
===================================================================
--- /dev/null
+++ test/tools/llvm-dwarfdump/X86/apple_names_verify_form.s
@@ -0,0 +1,58 @@
+# RUN: llvm-mc %s -filetype obj -triple x86_64-apple-darwin -o - \
+# RUN: | not llvm-dwarfdump -verify - \
+# RUN: | FileCheck %s
+
+# CHECK: Verifying .apple_names...
+# CHECK-NEXT: error: unsupported form; failed to read HashData at 0x00000040
+
+# This test is meant to verify that the -verify option
+# in llvm-dwarfdump, correctly identifies that Atom[0].form is unsupported.
+# As a result, the hashdata cannot be read.
+
+ .section __TEXT,__text,regular,pure_instructions
+ .file 1 "basic.c"
+ .comm _i,4,2 ## @i
+ .comm _j,4,2 ## @j
+ .section __DWARF,__debug_str,regular,debug
+Linfo_string:
+ .asciz "Apple LLVM version 8.1.0 (clang-802.0.35)" ## string offset=0
+ .asciz "basic.c" ## string offset=42
+ .asciz "/Users/sgravani/Development/tests" ## string offset=50
+ .asciz "i" ## string offset=84
+ .asciz "int" ## string offset=86
+ .asciz "j" ## string offset=90
+ .section __DWARF,__debug_info,regular,debug
+Lsection_info:
+ .section __DWARF,__apple_names,regular,debug
+Lnames_begin:
+ .long 1212240712 ## Header Magic
+ .short 1 ## Header Version
+ .short 0 ## Header Hash Function
+ .long 2 ## Header Bucket Count
+ .long 2 ## Header Hash Count
+ .long 12 ## Header Data Length
+ .long 0 ## HeaderData Die Offset Base
+ .long 1 ## HeaderData Atom Count
+ .short 1 ## DW_ATOM_die_offset
+ .short 400 ## DW_FORM_data4 -- error: unsupported form; failed to read HashData at 0x00000040
+ .long 0 ## Bucket 0
+ .long 1 ## Bucket 1
+ .long 177678 ## Hash in Bucket 0
+ .long 177679 ## Hash in Bucket 1
+ .long LNames0-Lnames_begin ## Offset in Bucket 0
+ .long LNames1-Lnames_begin ## Offset in Bucket 1
+LNames0:
+ .long 84 ## i
+ .long 1 ## Num DIEs
+ .long 30
+ .long 0
+LNames1:
+ .long 90 ## j
+ .long 1 ## Num DIEs
+ .long 58
+ .long 0
+
+.subsections_via_symbols
+ .section __DWARF,__debug_line,regular,debug
+Lsection_line:
+Lline_table_start0: