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[Bug libc/18023] extend_alloca is broken (questionable pointer comparison, horrible machine code)

--- Comment #9 from cvs-commit at gcc dot <cvs-commit at gcc dot> ---
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The branch, release/2.26/master has been updated
       via  05155f0772a4befcc10da16ab64060ae7836ff7c (commit)
       via  13728f56f0cdfff536fe6673eae6881a3483a6a2 (commit)
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- Log -----------------------------------------------------------------;h=05155f0772a4befcc10da16ab64060ae7836ff7c

commit 05155f0772a4befcc10da16ab64060ae7836ff7c
Author: Florian Weimer <>
Date:   Thu Oct 19 10:44:31 2017 +0200

    nss_files: Avoid large buffers with many host addresses [BZ #22078]

    The previous implementation had at least a quadratic space
    requirement in the number of host addresses and aliases.

    (cherry picked from commit d8425e116cdd954fea0c04c0f406179b5daebbb3);h=13728f56f0cdfff536fe6673eae6881a3483a6a2

commit 13728f56f0cdfff536fe6673eae6881a3483a6a2
Author: Florian Weimer <>
Date:   Wed Oct 11 07:01:34 2017 +0200

    nss_files: Use struct scratch_buffer for gethostbyname [BZ #18023]

    (cherry picked from commit 78e806fd8cd8c918d3bbe1bcdf9091ab365e4a69);h=5ebb81e29243ff286bd46dea62fab46a40dfd6c3

commit 5ebb81e29243ff286bd46dea62fab46a40dfd6c3
Author: Florian Weimer <>
Date:   Tue Oct 10 11:50:41 2017 +0200

    nss_files: Refactor gethostbyname3 multi case into separate function

    This is in preparation of further cleanup work.

    (cherry picked from commit 8ed70de2faceb4bd7b35bbdc2b7e8c83d9a297ba)


Summary of changes:
 ChangeLog                       |   22 +++
 NEWS                            |    1 +
 nss/Makefile                    |    2 +
 nss/nss_files/files-hosts.c     |  400 +++++++++++++++++++++------------------
 nss/tst-nss-files-hosts-multi.c |  331 ++++++++++++++++++++++++++++++++
 5 files changed, 568 insertions(+), 188 deletions(-)
 create mode 100644 nss/tst-nss-files-hosts-multi.c

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