Index: lib/DebugInfo/DWARF/DWARFDebugRnglists.cpp =================================================================== --- lib/DebugInfo/DWARF/DWARFDebugRnglists.cpp +++ lib/DebugInfo/DWARF/DWARFDebugRnglists.cpp @@ -123,7 +123,7 @@ if (RLE.EntryKind == dwarf::DW_RLE_base_addressx) { BaseAddr = U.getAddrOffsetSectionItem(RLE.Value0); if (!BaseAddr) - BaseAddr = {RLE.Value0, 0}; + BaseAddr = {RLE.Value0, -1ULL}; continue; } if (RLE.EntryKind == dwarf::DW_RLE_base_address) { @@ -156,7 +156,7 @@ case dwarf::DW_RLE_startx_length: { auto Start = U.getAddrOffsetSectionItem(RLE.Value0); if (!Start) - Start = {0, 0}; + Start = {0, -1ULL}; E.SectionIndex = Start->SectionIndex; E.LowPC = Start->Address; E.HighPC = E.LowPC + RLE.Value1; Index: test/tools/llvm-dwarfdump/X86/no_debug_addr.s =================================================================== --- test/tools/llvm-dwarfdump/X86/no_debug_addr.s +++ test/tools/llvm-dwarfdump/X86/no_debug_addr.s @@ -0,0 +1,197 @@ +# RUN: llvm-mc %s -filetype obj -triple=x86_64-pc-linux -o %t.o +# RUN: llvm-dwarfdump -v %t.o | FileCheck %s + +## When .debug_addr is absent for some reason, +## check we do not print a bogus section name. + +# CHECK: DW_AT_ranges [DW_FORM_rnglistx] (indexed (0x0) rangelist = 0x00000004 +# CHECK-NEXT: [0x0000000000000000, 0x0000000000000001) +# CHECK-NEXT: [0x0000000000000000, 0x0000000000000002) +# CHECK-NEXT: [0x0000000000000003, 0x0000000000000004)) + +.text +.section .text._Z3zedv,"ax",@progbits +.Lfunc_begin0: + retq +.Lfunc_end0: + +.section .text.main,"ax",@progbits +.Lfunc_begin1: + retq + retq +.Lfunc_end1: + +.section .debug_str_offsets,"",@progbits +.long 32 +.short 5 +.short 0 +.Lstr_offsets_base0: + .long .Linfo_string0 + .long .Linfo_string0 + .long .Linfo_string0 + .long .Linfo_string0 + .long .Linfo_string0 + .long .Linfo_string0 + .long .Linfo_string0 + +.section .debug_str,"MS",@progbits,1 +.Linfo_string0: + .asciz "stub" + +.section .debug_abbrev,"",@progbits + .byte 1 # Abbreviation Code + .byte 17 # DW_TAG_compile_unit + .byte 1 # DW_CHILDREN_yes + .byte 37 # DW_AT_producer + .byte 37 # DW_FORM_strx1 + .byte 19 # DW_AT_language + .byte 5 # DW_FORM_data2 + .byte 3 # DW_AT_name + .byte 37 # DW_FORM_strx1 + .byte 114 # DW_AT_str_offsets_base + .byte 23 # DW_FORM_sec_offset + .byte 16 # DW_AT_stmt_list + .byte 23 # DW_FORM_sec_offset + .byte 27 # DW_AT_comp_dir + .byte 37 # DW_FORM_strx1 + .byte 115 # DW_AT_addr_base + .byte 23 # DW_FORM_sec_offset + .byte 17 # DW_AT_low_pc + .byte 1 # DW_FORM_addr + .byte 85 # DW_AT_ranges + .byte 35 # DW_FORM_rnglistx + .byte 116 # DW_AT_rnglists_base + .byte 23 # DW_FORM_sec_offset + .byte 0 # EOM(1) + .byte 0 # EOM(2) + .byte 2 # Abbreviation Code + .byte 46 # DW_TAG_subprogram + .byte 0 # DW_CHILDREN_no + .byte 17 # DW_AT_low_pc + .byte 27 # DW_FORM_addrx + .byte 18 # DW_AT_high_pc + .byte 6 # DW_FORM_data4 + .byte 64 # DW_AT_frame_base + .byte 24 # DW_FORM_exprloc + .byte 110 # DW_AT_linkage_name + .byte 37 # DW_FORM_strx1 + .byte 3 # DW_AT_name + .byte 37 # DW_FORM_strx1 + .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 63 # DW_AT_external + .byte 25 # DW_FORM_flag_present + .byte 0 # EOM(1) + .byte 0 # EOM(2) + .byte 3 # Abbreviation Code + .byte 46 # DW_TAG_subprogram + .byte 0 # DW_CHILDREN_no + .byte 17 # DW_AT_low_pc + .byte 27 # DW_FORM_addrx + .byte 18 # DW_AT_high_pc + .byte 6 # DW_FORM_data4 + .byte 64 # DW_AT_frame_base + .byte 24 # DW_FORM_exprloc + .byte 3 # DW_AT_name + .byte 37 # DW_FORM_strx1 + .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 63 # DW_AT_external + .byte 25 # DW_FORM_flag_present + .byte 0 # EOM(1) + .byte 0 # EOM(2) + .byte 4 # Abbreviation Code + .byte 36 # DW_TAG_base_type + .byte 0 # DW_CHILDREN_no + .byte 3 # DW_AT_name + .byte 37 # DW_FORM_strx1 + .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 .debug_info,"",@progbits +.Lcu_begin0: + .long 75 # Length of Unit + .short 5 # DWARF version number + .byte 1 # DWARF Unit Type + .byte 8 # Address Size (in bytes) + .long .debug_abbrev # Offset Into Abbrev. Section + + .byte 1 # Abbrev [1] 0xc:0x43 DW_TAG_compile_unit + .byte 0 # DW_AT_producer + .short 4 # DW_AT_language + .byte 1 # DW_AT_name + .long .Lstr_offsets_base0 # DW_AT_str_offsets_base + .long 0 # DW_AT_stmt_list + .byte 2 # DW_AT_comp_dir + .long 0 # DW_AT_addr_base + .quad 0 # DW_AT_low_pc + .byte 0 # DW_AT_ranges + .long .Lrnglists_table_base0 # DW_AT_rnglists_base + + .byte 2 # Abbrev [2] 0x2b:0x10 DW_TAG_subprogram + .byte 0 # DW_AT_low_pc + .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc + .byte 1 # DW_AT_frame_base + .byte 86 + .byte 3 # DW_AT_linkage_name + .byte 4 # DW_AT_name + .byte 1 # DW_AT_decl_file + .byte 1 # DW_AT_decl_line + .long 74 # DW_AT_type + # DW_AT_external + + .byte 3 # Abbrev [3] 0x3b:0xf DW_TAG_subprogram + .byte 1 # DW_AT_low_pc + .long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc + .byte 1 # DW_AT_frame_base + .byte 86 + .byte 6 # DW_AT_name + .byte 1 # DW_AT_decl_file + .byte 5 # DW_AT_decl_line + .long 74 # DW_AT_type + # DW_AT_external + + .byte 4 # Abbrev [4] 0x4a:0x4 DW_TAG_base_type + .byte 5 # DW_AT_name + .byte 5 # DW_AT_encoding + .byte 4 # DW_AT_byte_size + .byte 0 # End Of Children Mark + +.section .debug_rnglists,"",@progbits +.long .Ldebug_rnglist_table_end0-.Ldebug_rnglist_table_start0 # Length +.Ldebug_rnglist_table_start0: + .short 5 # Version + .byte 8 # Address size + .byte 0 # Segment selector size + .long 1 # Offset entry count +.Lrnglists_table_base0: + .long .Ldebug_ranges0-.Lrnglists_table_base0 +.Ldebug_ranges0: + .byte 3 # DW_RLE_startx_length + .byte 0 # start index + .uleb128 .Lfunc_end0-.Lfunc_begin0 # length + .byte 3 # DW_RLE_startx_length + .byte 1 # start index + .uleb128 .Lfunc_end1-.Lfunc_begin1 # length + + .byte 1 # DW_RLE_base_addressx + .byte 0 # Base address (index 0 in .debug_addr) + .byte 4 # DW_RLE_offset_pair + .byte 0x3 # Start offset + .byte 0x4 # End offset + + .byte 0 # DW_RLE_end_of_list +.Ldebug_rnglist_table_end0: