[Bug libc/23489] "gcc -lmcheck" aborts on free when using posix_memalign

[Bug libc/23489] "gcc -lmcheck" aborts on free when using posix_memalign

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=23489

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |28068


Referenced Bugs:

https://sourceware.org/bugzilla/show_bug.cgi?id=28068
[Bug 28068] FAIL: malloc/tst-mallocalign1-mcheck
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[Bug libc/23489] "gcc -lmcheck" aborts on free when using posix_memalign

[siddhesh at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=23489

Siddhesh Poyarekar <siddhesh at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at sourceware dot org   |siddhesh at sourceware dot org
                 CC|                            |siddhesh at sourceware dot org
             Status|NEW                         |ASSIGNED

--- Comment #26 from Siddhesh Poyarekar <siddhesh at sourceware dot org> ---
I can reproduce this and it should get fixed once the patchset[1] to move
malloc debugging out into a separate DSO is pushed.

[1] https://patchwork.sourceware.org/project/glibc/list/?series=2486

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[Bug libc/23489] "gcc -lmcheck" aborts on free when using posix_memalign

[siddhesh at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=23489

Siddhesh Poyarekar <siddhesh at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
   Target Milestone|---                         |2.34
             Status|ASSIGNED                    |RESOLVED

--- Comment #27 from Siddhesh Poyarekar <siddhesh at sourceware dot org> ---
commit c142eb253f3814f46527e9b37484041dd85702cf
Author: Siddhesh Poyarekar <siddhesh@sourceware.org>
Date:   Thu Jul 22 18:38:02 2021 +0530

    mcheck: Wean away from malloc hooks [BZ #23489]

    Split the mcheck implementation into the debugging hooks and API so
    that the API can be replicated in libc and libc_malloc_debug.so.  The
    libc APIs always result in failure.

    The mcheck implementation has also been moved entirely into
    libc_malloc_debug.so and with it, all of the hook initialization code
    can now be moved into the debug library.  Now the initialization can
    be done independently of libc internals.

    With this patch, libc_malloc_debug.so can no longer be used with older
    libcs, which is not its goal anyway.  tst-vfork3 breaks due to this
    since it spawns shell scripts, which in turn execute using the system
    glibc.  Move the test to tests-container so that only the built glibc
    is used.

    This move also fixes bugs in the mcheck version of memalign and
    realloc, thus allowing removal of the tests from tests-mcheck
    exclusion list.

    Reviewed-by: Carlos O'Donell <carlos@redhat.com>
    Tested-by: Carlos O'Donell <carlos@redhat.com>

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[Bug libc/23489] "gcc -lmcheck" aborts on free when using posix_memalign

[ht990332 at gmx dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=23489

--- Comment #28 from Hussam Al-Tayeb <ht990332 at gmx dot com> ---
(In reply to Siddhesh Poyarekar from comment #26)
> I can reproduce this and it should get fixed once the patchset[1] to move
> malloc debugging out into a separate DSO is pushed.
> 
> [1] https://patchwork.sourceware.org/project/glibc/list/?series=2486

Can this be safely backported to the 2.33 branch?

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[Bug libc/23489] "gcc -lmcheck" aborts on free when using posix_memalign

[siddhesh at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=23489

--- Comment #29 from Siddhesh Poyarekar <siddhesh at sourceware dot org> ---
I'm afraid not, the patchset introduces an ABI change.  It may be possible to
isolate and backport some fixes for mcheck.

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