326110 - PR_SetSysfdTableSize and PR_GetSysfdTableMax are not exported

Status: RESOLVED FIXED

(NSPR :: NSPR, defect, P1)

Description

[Noriko Hosoi]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1
Build Identifier: 

We are taking Wan-Teh's suggestion and put the ifdef statement to work around the build failure.

Wan-Teh wrote:
I looked at the NSPR source code and bug database.
I believe these two functions are intended to be
exported even though they are not documented in
the NSPR Reference and not declared in any NSPR
header files.

In NSPR 4.6, I added a Linux so that only the
functions declared in our public headers are
exported from our shared libraries.  This is
why you get undefined references for those two
functions on RHEL.

If you have an account in bugzilla.mozilla.org,
could you file an NSPR bug report?

https://bugzilla.mozilla.org/enter_bug.cgi?product=NSPR

Meantime, I suggest that you temporarily work
around this NSPR bug like this:

#ifdef LINUX
    /*
     * NSPR 4.6 does not export PR_SetSysfdTableSize
     * and PR_GetSysfdTableMax by mistake (NSPR Bugzilla
     * bug xxxxxx) on platforms that use GCC with symbol
     * visibility, so we have to call the system calls
     * directly.
     */
    {
        struct rlimit rlim;

        if (getrlimit(RLIMIT_NOFILE, &rlim) < 0)
            return;
        rlim.rlim_cur = rlim.rlim_max;
        (void) setrlimit(RLIMIT_NOFILE, &rlim);
    }
#else
    PR_SetSysfdTableSize(PR_GetSysfdTableMax());
#endif

Wan-Teh 

Reproducible: Always

Comment 1

[Wan-Teh Chang]

Attachment: Proposed patch

I considered declaring these two functions in prio.h or
prsystem.h.  But then I saw this comment before their
definitions in ptio.c:

/*
 * The next two entry points should not be in the API, but they are
 * defined here for historical (or hysterical) reasons.
 */

So I decided to declare them in "obsolete/probslet.h".

Noriko, if you know how to build NSPR, could you apply this
patch to NSPR_4_6_RTM and see if it fixes the bug for you?

Comment 2

[Kai Engert (:KaiE:)]

Comment on attachment 210929 [details] [diff] [review]
Proposed patch

r=kengert

Comment 3

[Noriko Hosoi]

(In reply to comment #1)
> [...]
> /*
>  * The next two entry points should not be in the API, but they are
>  * defined here for historical (or hysterical) reasons.
>  */
> 
> So I decided to declare them in "obsolete/probslet.h".
> 
> Noriko, if you know how to build NSPR, could you apply this
> patch to NSPR_4_6_RTM and see if it fixes the bug for you?
> 
I applied the patch to my NSPR tree (sorry, it's not NSPR_4_6_RTM, but the trunk) and built NSPR.  I could build DS fine which pointed to the newly built NSPR.
Thank you, Wan-Teh.

Comment 4

[Wan-Teh Chang]

I checked in the patch on the NSPR trunk (NSPR 4.7),
NSPRPUB_PRE_4_2_CLIENT_BRANCH (mozilla1.9alpha), and
NSPR_4_6_BRANCH (NSPR 4.6.2).

Checking in probslet.h;
/cvsroot/mozilla/nsprpub/pr/include/obsolete/probslet.h,v  <--  probslet.h
new revision: 3.11; previous revision: 3.10
done

Checking in probslet.h;
/cvsroot/mozilla/nsprpub/pr/include/obsolete/probslet.h,v  <--  probslet.h
new revision: 3.8.4.3; previous revision: 3.8.4.2
done

Checking in probslet.h;
/cvsroot/mozilla/nsprpub/pr/include/obsolete/probslet.h,v  <--  probslet.h
new revision: 3.9.2.1; previous revision: 3.9
done

Note that these two functions are not exported on
Windows and were not exported on Windows before.
Perhaps we should also use PR_IMPLEMENT with their
definitions to cause them to be exported on Windows.

Comment 5

[Wan-Teh Chang]

Attachment: Use PR_IMPLEMENT also

I was wrong.  Although these two functions were not
exported on Windows before, by declaring them with
NSPR_API in a public header, we are exporting them
on Windows now.

It is still a good idea to use PR_IMPLEMENT with
these two functions.  That's what this patch does.
I've checked it on on the NSPR trunk (NSPR 4.7),
NSPRPUB_PRE_4_2_CLIENT_BRANCH (mozilla1.9alpha),
and NSPR_4_6_BRANCH (NSPR 4.6.2).

Checking in io/prfile.c;
/cvsroot/mozilla/nsprpub/pr/src/io/prfile.c,v  <--  prfile.c
new revision: 3.44; previous revision: 3.43
done
Checking in pthreads/ptio.c;
/cvsroot/mozilla/nsprpub/pr/src/pthreads/ptio.c,v  <--  ptio.c
new revision: 3.104; previous revision: 3.103
done

Checking in io/prfile.c;
/cvsroot/mozilla/nsprpub/pr/src/io/prfile.c,v  <--  prfile.c
new revision: 3.36.2.8; previous revision: 3.36.2.7
done
Checking in pthreads/ptio.c;
/cvsroot/mozilla/nsprpub/pr/src/pthreads/ptio.c,v  <--  ptio.c
new revision: 3.71.2.25; previous revision: 3.71.2.24
done

Checking in io/prfile.c;
/cvsroot/mozilla/nsprpub/pr/src/io/prfile.c,v  <--  prfile.c
new revision: 3.42.2.1; previous revision: 3.42
done
Checking in pthreads/ptio.c;
/cvsroot/mozilla/nsprpub/pr/src/pthreads/ptio.c,v  <--  ptio.c
new revision: 3.101.2.1; previous revision: 3.101
done

Comment 6

[Julien Pierre]

Wan-Teh,

These 2 functions were already in nspr.def, which I had checked before reviewing the patch. I wasn't aware they weren't supposed to be exported on windows. Is nspr.def not used for all platforms as for NSS ?

Comment 7

[Wan-Teh Chang]

Julien,

In NSPR, the .def files are currently only used by
Solaris and OS/2.  We can use the .def files on
other platforms.  However, we may not be able to
use the .def files on Windows because they conflict
with the _declspec(dllexport) keyword that PR_IMPLEMENT
expands to on Windows.

These two functions were not exported on Windows.
It's fine to export them, which is why I decided to
export them now to have cross-platform consistency.

Comment 8

[Wan-Teh Chang]

I checked in the patches on the MOZILLA_1_8_BRANCH,
keeping it in sync with the NSPR_4_6_BRANCH.

Checking in pr/include/obsolete/probslet.h;
/cvsroot/mozilla/nsprpub/pr/include/obsolete/probslet.h,v  <--  probslet.h
new revision: 3.8.4.1.32.1; previous revision: 3.8.4.1
done
Checking in pr/src/io/prfile.c;
/cvsroot/mozilla/nsprpub/pr/src/io/prfile.c,v  <--  prfile.c
new revision: 3.36.2.6.16.1; previous revision: 3.36.2.6
done
Checking in pr/src/pthreads/ptio.c;
/cvsroot/mozilla/nsprpub/pr/src/pthreads/ptio.c,v  <--  ptio.c
new revision: 3.71.2.21.12.2; previous revision: 3.71.2.21.12.1
done