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From: "vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug ada/30726] [gdb/ada, cc-with-dwz] FAIL:
 gdb.ada/arr_acc_idx_w_gap.exp: enum_rep
Date: Sun, 06 Aug 2023 14:28:01 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D30726

--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
With target board unix, looking at the debug info we have:
...
 <0><81c>: Abbrev Number: 1 (DW_TAG_compile_unit)
    <822>   DW_AT_name        : enum_with_gap.adb
 <1><84c>: Abbrev Number: 4 (DW_TAG_enumeration_type)
    <84d>   DW_AT_name        : enum_with_gap__enum_with_gaps
 <2><86b>: Abbrev Number: 5 (DW_TAG_enumerator)
    <86c>   DW_AT_name        : enum_with_gap__lit3
    <870>   DW_AT_const_value : 13
<0><9e9>: Abbrev Number: 1 (DW_TAG_compile_unit)
    <9ef>   DW_AT_name        : enum_with_gap_main.adb
 <1><a20>: Abbrev Number: 4 (DW_TAG_enumeration_type)
    <a21>   DW_AT_name        : enum_with_gap__enum_with_gaps
 <2><a3f>: Abbrev Number: 5 (DW_TAG_enumerator)
    <a40>   DW_AT_name        : enum_with_gap__lit3
    <a44>   DW_AT_const_value : 13
 <1><b4c>: Abbrev Number: 16 (DW_TAG_enumeration_type)
    <b4d>   DW_AT_name        : enum_with_gap__enum_subrangeB
    <b55>   DW_AT_artificial  : 1
 <2><b6b>: Abbrev Number: 5 (DW_TAG_enumerator)
    <b6c>   DW_AT_name        : enum_with_gap__lit3__2
    <b70>   DW_AT_const_value : 13
...

Dwz moves enum_with_gap__enum_with_gaps into a partial unit.

That somehow changes the symbol table.

With target board unix, the first item with canonical name lit3 is:
...
    [721] ((cooked_index_entry *) 0x7fe8d8009b00)
    name:       enum_with_gap__lit3
    canonical:  lit3
    DWARF tag:  DW_TAG_enumerator
    flags:      0x2 [IS_STATIC]
    DIE offset: 0x86b
    parent:     ((cooked_index_entry *) 0x7fe8d8021fe0) [enum_with_gap]
...

With target board cc-with-dwz, it's instead:
...
    [780] ((cooked_index_entry *) 0x7f9d1c0049c0)
    name:       enum_with_gap__lit3__2
    canonical:  lit3
    DWARF tag:  DW_TAG_enumerator
    flags:      0x2 [IS_STATIC]
    DIE offset: 0x23a5
    parent:     ((cooked_index_entry *) 0x7f9d1c025ad0) [enum_with_gap]
...

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