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From: "mark at klomp dot org" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug libelf/28190] FAIL: run-backtrace-native.sh with glibc 2.34
Date: Wed, 04 Aug 2021 18:56:42 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28190

Mark Wielaard <mark at klomp dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2021-08-04
             Status|UNCONFIRMED                 |ASSIGNED

--- Comment #2 from Mark Wielaard <mark at klomp dot org> ---
This comes from the following glibc commit:

commit f779b1efb35fe141e47952af3ac7f0540acca401
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Mon Dec 7 16:21:55 2020 -0300

    nptl: Implement raise in terms of pthread_kill

    Now that pthread_kill is provided by libc.so it is possible to
    implement the generic POSIX implementation as
    'pthread_kill(pthread_self(), sig)'.

    For Linux implementation, pthread_kill read the targeting TID from
    the TCB.  For raise, this it not possible because it would make raise
    fail when issue after vfork (where creates the resulting process
    has a different TID from the parent, but its TCB is not updated as
    for pthread_create).  To make raise use pthread_kill, it is make
    usable from vfork by getting the target thread id through gettid
    syscall.

    Checked on x86_64-linux-gnu and aarch64-linux-gnu.

Before raise simply called the (tg)kill syscall directly. Now we have an ex=
tra
frame in the backtrace.

--=20
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