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From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug testsuite/31202] [gdb/testsuite, aarch64] "[PAC]" in backtrace
Date: Thu, 04 Jan 2024 12:42:28 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D31202

--- 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=3D2bcfdb758bb1=
8e29cf6c0486c448bf78dbbc0c8a

commit 2bcfdb758bb18e29cf6c0486c448bf78dbbc0c8a
Author: Tom de Vries <tdevries@suse.de>
Date:   Thu Jan 4 13:42:45 2024 +0100

    [gdb/testsuite] Handle PAC marker

    On aarch64-linux, I run into:
    ...
    FAIL: gdb.base/annota1.exp: backtrace from shlibrary (timeout)
    ...
    due to the PAC marker showing up:
    ...
    ^Z^Zframe-address^M
    0x000000000041025c [PAC]^M
    ^Z^Zframe-address-end^M
    ...

    In the docs the marker is documented as follows:
    ...
    When GDB is debugging the AArch64 architecture, and the program is using
the
    v8.3-A feature Pointer Authentication (PAC), then whenever the link
register
    $lr is pointing to an PAC function its value will be masked.  When GDB
prints
    a backtrace, any addresses that required unmasking will be postfixed wi=
th
the
    marker [PAC].  When using the MI, this is printed as part of the addr_f=
lags
    field.
    ...

    Update the test-case to allow the PAC marker.

    Likewise in a few other test-cases.

    While we're at it, rewrite the affected pattern pat_begin in annota1.exp
into
    a more readable form.  Likewise for the corresponding pat_end.

    Tested on aarch64-linux.

    Approved-By: Luis Machado <luis.machado@arm.com>

    PR testsuite/31202
    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=3D31202

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