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add new test for warning, update existing test to not fail with the warning
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‎lld/test/ELF/gdb-index-missing-pubnames.s‎

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# REQUIRES: x86
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# RUN: rm -rf %t && split-file %s %t && cd %t
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# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux input.s -o input.o
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# RUN: ld.lld --gdb-index input.o -o output.exe 2>&1 | FileCheck %s --check-prefix=WARNING --implicit-check-not=warning:
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# WARNING: warning: input.o: file contains debug info but is missing .debug_gnu_pubnames or .debug_gnu_pubtypes sections required by --gdb-index. Compile the file using -gsplit-dwarf or -ggnu-pubnames to generate these sections.
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# The input file was generated by compiling 'void _start() {}' with
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# clang -g -O2 -S and stripping out some unneeded parts.
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#--- input.s
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.file "test.c"
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.text
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.globl _start # -- Begin function _start
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.p2align 4
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.type _start,@function
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_start: # @_start
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.Lfunc_begin0:
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.cfi_startproc
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nop
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.Lfunc_end0:
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.size _start, .Lfunc_end0-_start
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.cfi_endproc
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# -- End function
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.section .debug_abbrev,"",@progbits
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.byte 1 # Abbreviation Code
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.byte 17 # DW_TAG_compile_unit
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.byte 1 # DW_CHILDREN_yes
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.byte 37 # DW_AT_producer
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.byte 37 # DW_FORM_strx1
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.byte 19 # DW_AT_language
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.byte 5 # DW_FORM_data2
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.byte 3 # DW_AT_name
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.byte 37 # DW_FORM_strx1
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.byte 114 # DW_AT_str_offsets_base
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.byte 23 # DW_FORM_sec_offset
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.byte 16 # DW_AT_stmt_list
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.byte 23 # DW_FORM_sec_offset
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.byte 27 # DW_AT_comp_dir
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.byte 37 # DW_FORM_strx1
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.byte 17 # DW_AT_low_pc
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.byte 27 # DW_FORM_addrx
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.byte 18 # DW_AT_high_pc
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.byte 6 # DW_FORM_data4
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.byte 115 # DW_AT_addr_base
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.byte 23 # DW_FORM_sec_offset
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 2 # Abbreviation Code
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.byte 46 # DW_TAG_subprogram
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.byte 0 # DW_CHILDREN_no
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.byte 17 # DW_AT_low_pc
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.byte 27 # DW_FORM_addrx
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.byte 18 # DW_AT_high_pc
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.byte 6 # DW_FORM_data4
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.byte 64 # DW_AT_frame_base
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.byte 24 # DW_FORM_exprloc
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.byte 122 # DW_AT_call_all_calls
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.byte 25 # DW_FORM_flag_present
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.byte 3 # DW_AT_name
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.byte 37 # DW_FORM_strx1
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.byte 58 # DW_AT_decl_file
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.byte 11 # DW_FORM_data1
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.byte 59 # DW_AT_decl_line
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.byte 11 # DW_FORM_data1
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.byte 63 # DW_AT_external
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.byte 25 # DW_FORM_flag_present
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 0 # EOM(3)
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.section .debug_info,"",@progbits
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.Lcu_begin0:
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.long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
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.Ldebug_info_start0:
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.short 5 # DWARF version number
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.byte 1 # DWARF Unit Type
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.byte 8 # Address Size (in bytes)
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.long .debug_abbrev # Offset Into Abbrev. Section
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.byte 1 # Abbrev [1] 0xc:0x23 DW_TAG_compile_unit
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.byte 0 # DW_AT_producer
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.short 29 # DW_AT_language
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.byte 1 # DW_AT_name
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.long .Lstr_offsets_base0 # DW_AT_str_offsets_base
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.long .Lline_table_start0 # DW_AT_stmt_list
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.byte 2 # DW_AT_comp_dir
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.byte 0 # DW_AT_low_pc
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.long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
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.long .Laddr_table_base0 # DW_AT_addr_base
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.byte 2 # Abbrev [2] 0x23:0xb DW_TAG_subprogram
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.byte 0 # DW_AT_low_pc
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.long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
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.byte 1 # DW_AT_frame_base
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.byte 87
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# DW_AT_call_all_calls
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.byte 3 # DW_AT_name
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.byte 0 # DW_AT_decl_file
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.byte 1 # DW_AT_decl_line
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# DW_AT_external
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.byte 0 # End Of Children Mark
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.Ldebug_info_end0:
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.section .debug_str_offsets,"",@progbits
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.long 20 # Length of String Offsets Set
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.short 5
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.short 0
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.Lstr_offsets_base0:
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.section .debug_str,"MS",@progbits,1
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.Linfo_string0:
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.asciz "clang version 22.0.0git (027279a7ef2bedffcd0d23f605fc0e135ad77e37)"
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.Linfo_string1:
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.asciz "test.c"
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.Linfo_string2:
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.asciz ""
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.Linfo_string3:
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.asciz "_start"
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.section .debug_str_offsets,"",@progbits
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.long .Linfo_string0
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.long .Linfo_string1
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.long .Linfo_string2
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.long .Linfo_string3
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.section .debug_addr,"",@progbits
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.long .Ldebug_addr_end0-.Ldebug_addr_start0 # Length of contribution
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.Ldebug_addr_start0:
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.short 5 # DWARF version number
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.byte 8 # Address size
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.byte 0 # Segment selector size
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.Laddr_table_base0:
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.quad .Lfunc_begin0
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.Ldebug_addr_end0:
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.ident "clang version 22.0.0git (027279a7ef2bedffcd0d23f605fc0e135ad77e37)"
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.section ".note.GNU-stack","",@progbits
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.addrsig
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.section .debug_line,"",@progbits
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.Lline_table_start0:

‎lld/test/ELF/gdb-index-multiple-cu-2.s‎

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# REQUIRES: x86
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# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.o
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# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %p/Inputs/gdb-index-multiple-cu-2.s -o %t1.o
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# RUN: ld.lld --gdb-index %t.o %t1.o -o %t 2>&1 | count 0
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# RUN: ld.lld --gdb-index %t.o %t1.o -o %t 2>&1 | sed '/missing .debug_gnu_pubnames/d' | count 0
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# RUN: llvm-dwarfdump -gdb-index %t | FileCheck %s
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# %t.o has 2 CUs while %t1 has 1, thus _start in %t1.o should have cuIndex 2.

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