[SCM] Hurd branch, master, updated. v0.5-437-g5f1011a

[Justus Winter]

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- Log -----------------------------------------------------------------
commit 5f1011ac0ad676d1e7eaba14d1384180e98fb93e
Author: Justus Winter <address@hidden>
Date:   Fri Jun 20 14:27:59 2014 +0200

    include: detect use-after-free errors using the reference counts
    
    * include/refcount.h (refcount_init): There must be at least one
    reference at initialization time.
    (refcounts_init): Likewise.
    (refcount_unsafe_ref): New function retaining the previous
    functionality of refcount_ref.  It is occasionally useful to raise the
    reference count again after it dropped to zero.
    (refcounts_unsafe_ref): Likewise.
    (refcounts_unsafe_weak_ref): Likewise.
    (refcount_ref): Detect use-after-free errors.
    (refcounts_ref): Likewise.
    (refcounts_ref_weak): Likewise.
    * libtrivfs/protid-clean.c (trivfs_clean_protid): Use refcount_unsafe_ref.

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

Summary of changes:
 include/refcount.h       |   73 +++++++++++++++++++++++++++++++++++++++++-----
 libtrivfs/protid-clean.c |    2 +-
 2 files changed, 66 insertions(+), 9 deletions(-)


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