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From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug testsuite/31232] [gdb/testsuite, ppc64le] FAIL:
 gdb.dwarf2/dw2-entry-points.exp: bt foo
Date: Thu, 11 Jan 2024 15:04:37 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D31232

--- Comment #3 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=3Dbinutils-gdb.git;h=3Dfa87f8e1958b=
8937047e3d5fcfd8c265745710ae

commit fa87f8e1958b8937047e3d5fcfd8c265745710ae
Author: Tom de Vries <tdevries@suse.de>
Date:   Thu Jan 11 16:05:12 2024 +0100

    [gdb/testsuite] Fix gdb.dwarf2/dw2-entry-points.exp on ppc64le

    On ppc64le-linux, I run into:
    ...
    (gdb) bt^M
     #0  0x00000000100006dc in foobar (J=3D2)^M
     #1  0x000000001000070c in prog ()^M
    (gdb) FAIL: gdb.dwarf2/dw2-entry-points.exp: bt foo
    ...

    The test-case attemps to emulate additional entry points of a function,
with
    function bar having entry points foo and foobar:
    ...
    (gdb) p bar
    $1 =3D {void (int, int)} 0x1000064c <bar>
    (gdb) p foo
    $2 =3D {void (int, int)} 0x10000698 <foo>
    (gdb) p foobar
    $3 =3D {void (int)} 0x100006d0 <foobar>
    ...

    However, when setting a breakpoint on the entry point foo:
    ...
    (gdb) b foo
    Breakpoint 1 at 0x100006dc
    ...
    it ends up in foobar instead of in foo, due to prologue skipping, and
    consequently the backtrace show foobar instead foo.

    The problem is that the test-case does not emulate an actual prologue at
each
    entry point.

    Fix this by disabling the prologue skipping when setting a breakpoint,
using
    "break *foo".

    Tested on ppc64le-linux and x86_64-linux.

    Tested-By: Guinevere Larsen <blarsen@redhat.com>
    Approved-By: Ulrich Weigand <Ulrich.Weigand@de.ibm.com>

    PR testsuite/31232
    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=3D31232

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