[Bug testsuite/31592] [gdb/testsuite] gdb.dwarf2/dw2-epilogue-begin.exp drops epilogue_begin entry

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=31592

--- Comment #4 from Sourceware Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Tom de Vries <vries@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=d52ba54add0d2500403db63c09878e3f3cde8449

commit d52ba54add0d2500403db63c09878e3f3cde8449
Author: Tom de Vries <tdevries@suse.de>
Date:   Wed Apr 17 12:55:00 2024 +0200

    [gdb/testsuite] Require address update for DW_LNE_end_sequence

    With test-case gdb.dwarf2/dw2-epilogue-begin.exp, we have an end_sequence
    entry with the same address as the line entry before it:
    ...
    File name                    Line number    Starting address    View   
Stmt

    dw2-epilogue-begin.c                  44            0x4101e8              
x
    dw2-epilogue-begin.c                  47            0x4101ec              
x
    dw2-epilogue-begin.c                   -            0x4101ec
    ...
    and consequently the line entry is removed by gdb:
    ...
    INDEX  LINE   REL-ADDRESS        UNREL-ADDRESS      IS-STMT PRO EPI
    0      20     0x00000000004101a8 0x00000000004101a8 Y       Y   Y
    1      27     0x00000000004101b0 0x00000000004101b0 Y
    2      32     0x00000000004101b8 0x00000000004101b8 Y       Y
    3      34     0x00000000004101c0 0x00000000004101c0 Y           Y
    4      35     0x00000000004101c8 0x00000000004101c8 Y
    5      40     0x00000000004101d4 0x00000000004101d4 Y       Y
    6      44     0x00000000004101e8 0x00000000004101e8 Y
    7      END    0x00000000004101ec 0x00000000004101ec Y
    ...

    This is a common mistake in dwarf assembly test-cases.

    Fix this by:
    - requiring an address update for each DW_LNE_end_sequence, and
    - fixing the test-cases where that triggers an error.

    I also encountered the error in test-case gdb.dwarf2/dw2-bad-elf.exp, and
in
    this case I worked around it using "DW_LNS_advance_pc 0".

    Tested on aarch64-linux.

    PR testsuite/31592
    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31592

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