[Bug dynamic-link/11941] ld.so: Improper assert map->l_init_called in dlclose

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https://sourceware.org/bugzilla/show_bug.cgi?id=11941

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=57707b7fcc38855869321f8c7827bfe21d729f37

commit 57707b7fcc38855869321f8c7827bfe21d729f37
Author: Carlos O'Donell <carlos@redhat.com>
Date:   Fri Dec 23 13:30:22 2016 -0500

    Bug 11941: ld.so: Improper assert map->l_init_called in dlclose

    There is at least one use case where during exit a library destructor
    might call dlclose() on a valid handle and have it fail with an
    assertion. We must allow this case, it is a valid handle, and dlclose()
    should not fail with an assert. In the future we might be able to return
    an error that the dlclose() could not be completed because the opened
    library has already been unloaded and destructors have run as part of
    exit processing.

    For more details see:
    https://www.sourceware.org/ml/libc-alpha/2016-12/msg00859.html

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                         |   14 ++++++
 elf/Makefile                      |   14 +++++-
 elf/dl-close.c                    |   30 ++++++++++---
 elf/tst-nodelete-dlclose-dso.c    |   90 +++++++++++++++++++++++++++++++++++++
 elf/tst-nodelete-dlclose-plugin.c |   40 ++++++++++++++++
 elf/tst-nodelete-dlclose.c        |   35 ++++++++++++++
 6 files changed, 215 insertions(+), 8 deletions(-)
 create mode 100644 elf/tst-nodelete-dlclose-dso.c
 create mode 100644 elf/tst-nodelete-dlclose-plugin.c
 create mode 100644 elf/tst-nodelete-dlclose.c

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