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 @@ -54,6 +54,10 @@ uint32_t getNumHashes(); uint32_t getSizeHdr(); uint32_t getHeaderDataLength(); + uint32_t getNumAtoms(); + uint16_t getAtomType(int i); + dwarf::Form getAtomForm(int i); + 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 @@ -61,6 +61,32 @@ uint32_t DWARFAcceleratorTable::getHeaderDataLength() { return Hdr.HeaderDataLength; } +uint32_t DWARFAcceleratorTable::getNumAtoms() { return HdrData.Atoms.size(); } +uint16_t DWARFAcceleratorTable::getAtomType(int i) { + return HdrData.Atoms[i].first; +} +dwarf::Form DWARFAcceleratorTable::getAtomForm(int i) { + return HdrData.Atoms[i].second; +} + +uint32_t DWARFAcceleratorTable::readAtoms(uint32_t &HashDataOffset) { + uint32_t DieOffset = dwarf::DW_INVALID_OFFSET; + for (uint32_t i = 0; i < this->getNumAtoms(); ++i) { + DWARFFormValue FormValue(this->getAtomForm(i)); + if (FormValue.extractValue(AccelSection, &HashDataOffset, NULL)) { + switch (this->getAtomType(i)) { + 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. Index: lib/DebugInfo/DWARF/DWARFVerifier.cpp =================================================================== --- lib/DebugInfo/DWARF/DWARFVerifier.cpp +++ lib/DebugInfo/DWARF/DWARFVerifier.cpp @@ -298,14 +298,74 @@ 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; } } + + 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; + break; + } + + uint32_t StrpOffset; + uint32_t StringOffset; + uint32_t StringCount = 0; + uint32_t DieOffset = dwarf::DW_INVALID_OFFSET; + + uint32_t NumAtoms = AppleNames.getNumAtoms(); + if (NumAtoms == 0) { + OS << format("error: failed to read HashData at 0x%08x\n", + HashDataOffset + 8); + HashDataOffset = dwarf::DW_INVALID_OFFSET; + ++NumAppleNamesErrors; + } + + 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: failed to read HashData at 0x%08x\n", + HashDataOffsetStart); + ++NumAppleNamesErrors; + } 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 = ""; + + 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_verify_buckets_hashdataoffset.s =================================================================== --- /dev/null +++ test/tools/llvm-dwarfdump/X86/apple_names_verify_buckets_hashdataoffset.s @@ -0,0 +1,196 @@ +# 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: 0x000000fe + +# 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, +# as well as an invalid HashData offset for Hash[0] in the same 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 "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 + .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: 4294967294 + .long 177678 ## Hash in Bucket 0 -- error: error: Hash[0] has invalid HashData offset: 0x000000fe + .long Lobjc_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_die.s =================================================================== --- /dev/null +++ test/tools/llvm-dwarfdump/X86/apple_names_verify_die.s @@ -0,0 +1,196 @@ +# 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: .apple_names Bucket[0] Hash[0] = 0x0002b60e Str[0] = 0x00000054 DIE[0] = 0x00000001 is not a valid DIE offset for "i". + +# This test is meant to verify that the -verify option +# in llvm-dwarfdump, correctly identifies +# that the DIE is not valid offset in the .debug_info section +# 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 + .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 + .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 25 ## DW_FORM_data4 -- error: .apple_names Bucket[0] Hash[0] = 0x0002b60e Str[0] = 0x00000054 DIE[0] = 0x00000001 is not a valid DIE offset for "i". + .long 0 ## Bucket 0 + .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_hashdata_start.s =================================================================== --- test/tools/llvm-dwarfdump/X86/apple_names_verify_hashdata_start.s +++ test/tools/llvm-dwarfdump/X86/apple_names_verify_hashdata_start.s @@ -3,18 +3,20 @@ # RUN: | FileCheck %s # CHECK: Verifying .apple_names... -# CHECK-NEXT: error: Bucket[0] has invalid hash index: [-2] +# CHECK-NEXT: error: failed to read HashData at 0x00000034 # 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. +# that there's no data to read since number of Atoms is 0. - .section __TEXT,__text,regular,pure_instructions + .section __TEXT,__text,regular,pure_instructions .file 1 "basic.c" .comm _i,4,2 ## @i .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 .section __DWARF,__debug_loc,regular,debug @@ -109,10 +111,10 @@ .long 1 ## Header Hash Count .long 12 ## Header Data Length .long 0 ## HeaderData Die Offset Base - .long 1 ## HeaderData Atom Count + .long 0 ## HeaderData Atom Count -- error: failed to read HashData at 0x00000034 .short 1 ## DW_ATOM_die_offset .short 6 ## DW_FORM_data4 - .long -2 ## Bucket 0 -- error: Bucket[0] has invalid hash index: [-2] + .long 0 ## Bucket 0 .long 177678 ## Hash in Bucket 0 .long LNames0-Lnames_begin ## Offset in Bucket 0 LNames0: