[Bug nptl/19861] libpthread IFUNC resolver for fork can lead to crash

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https://sourceware.org/bugzilla/show_bug.cgi?id=19861

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=fc5ad7024c620cdfe9b76e94638aac83b99c5bf8

commit fc5ad7024c620cdfe9b76e94638aac83b99c5bf8
Author: Andreas Schwab <schwab@suse.de>
Date:   Tue Aug 8 16:21:58 2017 +0200

    Don't use IFUNC resolver for longjmp or system in libpthread (bug 21041)

    Unlike the vfork forwarder and like the fork forwarder as in bug 19861,
    there won't be a problem when the compiler does not turn this into a tail
    call.

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Summary of changes:
 ChangeLog         |    6 ++++++
 nptl/pt-longjmp.c |   31 ++++++++++---------------------
 nptl/pt-system.c  |   24 ++++++++----------------
 3 files changed, 24 insertions(+), 37 deletions(-)

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