[Bug libc/11929] glibc-2.12: static binaries: __getpagesize: Assertion `_rtld_global_ro._dl_pagesize != 0'

[Bug libc/11929] glibc-2.12: static binaries: __getpagesize: Assertion `_rtld_global_ro._dl_pagesize != 0'

[allan at archlinux dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=11929

--- Comment #2 from Allan McRae <allan at archlinux dot org> 2010-10-25 16:10:11 UTC ---
This patch causes some issues when static linking.  e.g.:

#include <iconv.h>
#include <stdio.h>
#include <errno.h>
int main () {
  iconv_t x;
  x = iconv_open ("UTF-8", "UTF-32LE");
  printf ("%d\n", errno == EINVAL);
  return 0;
}

The iconv_open fails when compiled with -static.  Using the workaround in
sysdeps/unix/sysv/linux/getpagesize.c from Fedora git "fixes" the issue:

-#ifdef __ASSUME_AT_PAGESIZE
+#if 0 && defined __ASSUME_AT_PAGESIZE

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[Bug libc/11929] glibc-2.12: static binaries: __getpagesize: Assertion `_rtld_global_ro._dl_pagesize != 0'

[lool at dooz dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=11929

Loïc Minier <lool at dooz dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |lool at dooz dot org

--- Comment #3 from Loïc Minier <lool at dooz dot org> 2010-11-11 14:57:00 UTC ---
Allan, is the iconv issue a new one?  Your testcase fails for me even when
Mike's patch isn't applied; I get an assertion failure
"_rtld_global_ro._dl_pagesize != 0".

What failure do you get?  Could you break in __getpagesize() and see what
pagesize you get in the first (static libc.a copy) and second (lib.so) hits?

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[Bug libc/11929] glibc-2.12: static binaries: __getpagesize: Assertion `_rtld_global_ro._dl_pagesize != 0'

[allan at archlinux dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=11929

--- Comment #4 from Allan McRae <allan at archlinux dot org> 2010-11-11 15:22:46 UTC ---
Yes...  it is not surprising that you run into the initial bug when not
applying the patch!

The point I was making is that Fedora's hack fix fixes both the "_dl_pagesize"
issue and the "iconv" one that I pointed out.  That leads me to suspect that
some part of the initialisation of static apps is still incomplete after the
application of the proposed patch.  And given that changing on #ifdef fixes
both, these issues were probably introduced at the same time.

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[Bug libc/11929] glibc-2.12: static binaries: __getpagesize: Assertion `_rtld_global_ro._dl_pagesize != 0'

[lool at dooz dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=11929

--- Comment #5 from Loïc Minier <lool at dooz dot org> 2010-11-11 15:32:45 UTC ---
Sorry, wasn't clear: I did not know whether you iconv issue was there before
the patch, and when reading your first comment, I thought it was a rebuttal for
Mike's patch, but I wanted to confirm that Mike's patch was an immediate net
win (moving arch-specific code to common code and fixing at least one class of
issues), even if it doesn't fix all instances of this class of bugs.

Hope this makes more sense now  :)

I understand that the Fedora change is just meant to be a workaround rather
than a fix?  There might be other random issues if the vdso isn't setup
properly in the static+dynamic case, so it would be best to init libc properly
in this case rather than fix just the getpagesize() issue?

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[Bug libc/11929] glibc-2.12: static binaries: __getpagesize: Assertion `_rtld_global_ro._dl_pagesize != 0'

[allan at archlinux dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=11929

--- Comment #6 from Allan McRae <allan at archlinux dot org> 2010-11-12 00:13:28 UTC ---
Yes, the patch is an improvement but it either:
1) is incomplete
2) introduces a new big (with iconv test case)

I am leaning towards #1, but have not had time to investigate further.

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[Bug libc/11929] glibc-2.12: static binaries: __getpagesize: Assertion `_rtld_global_ro._dl_pagesize != 0'

[me at matthewblair dot net]

http://sourceware.org/bugzilla/show_bug.cgi?id=11929

Matt Blair <me at matthewblair dot net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |me at matthewblair dot net

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[Bug libc/11929] glibc-2.12: static binaries: __getpagesize: Assertion `_rtld_global_ro._dl_pagesize != 0'

[vapier at gentoo dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=11929

--- Comment #7 from Mike Frysinger <vapier at gentoo dot org> 2010-11-22 18:57:59 UTC ---
the iconv code calls the gconv code which attempts to dynamically load shared
objects from /usr/lib64/gconv/.  i havent dug past that so far, but it seems to
boil down to the same issue -- dlopening shared objects from static objects is
broken.

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[Bug libc/11929] glibc-2.12: static binaries: __getpagesize: Assertion `_rtld_global_ro._dl_pagesize != 0'

[allan at archlinux dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=11929

--- Comment #8 from Allan McRae <allan at archlinux dot org> 2011-12-27 05:49:57 UTC ---
>From some quick testing, it appears this bug is fixed in glibc-2.15.  Possibly
by commit 02d46fc4.

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[Bug libc/11929] glibc-2.12: static binaries: __getpagesize: Assertion `_rtld_global_ro._dl_pagesize != 0'

[drepper.fsp at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=11929

Ulrich Drepper <drepper.fsp at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #9 from Ulrich Drepper <drepper.fsp at gmail dot com> 2012-01-09 01:40:26 UTC ---
I went ahead and marked the change as the fix.

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[Bug libc/11929] glibc-2.12: static binaries: __getpagesize: Assertion `_rtld_global_ro._dl_pagesize != 0'

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=11929

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-

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[Bug libc/11929] glibc-2.12: static binaries: __getpagesize: Assertion `_rtld_global_ro._dl_pagesize != 0'

[allan at archlinux dot org]

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                 CC|                            |allan at archlinux dot org


http://sourceware.org/bugzilla/show_bug.cgi?id=11929

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[Bug libc/11929] glibc-2.12: static binaries: __getpagesize: Assertion `_rtld_global_ro._dl_pagesize != 0'

[vapier at gentoo dot org]

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http://sourceware.org/bugzilla/show_bug.cgi?id=11929

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[Bug libc/11929] glibc-2.12: static binaries: __getpagesize: Assertion `_rtld_global_ro._dl_pagesize != 0'

[vapier at gentoo dot org]

------- Additional Comments From vapier at gentoo dot org  2010-08-19 22:41 -------
Created an attachment (id=4941)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=4941&action=view)
glibc-2.12-static-glro-init.patch


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