FreeBSD Port: www/firefox

[Jan Beich]

Konstantin Belousov <kostikbel at gmail.com> writes:

> On Wed, Apr 12, 2017 at 02:00:31AM +0200, Jan Beich wrote:
>
>> Christoph Moench-Tegeder <cmt at burggraben.net> writes:
>> 
>> > ## Jan Beich (jbeich at FreeBSD.org):
>> >
>> >> Walter Schwarzenfeld (privately) writes:
>> >> > With gtk3 on it starts after sysctl p1003_1b.sem_nsems_max=512.
>> >> > Please => pkg-message.
>> >> 
>> >> Don't use sem(4), it's deprecated since FreeBSD 9.0. p1003_1b.sem_nsems_max
>> >> doesn't have an effect with the new implementation.
>> >> 
>> >> https://svnweb.freebsd.org/changeset/base/201546
>> >
>> > Um. Firefox' "configure" code explicitly checks the maximum number
>> > of semaphores via sysconf(_SC_SEM_NSEMS_MAX) (that's in
>> > python/futures/concurrent/futures/process.py l. 250). As far as I
>> > can tell, in FreeBSD 10.3 that value is set by sysctl
>> > p1003_1b.sem_nsems_max - so at least for the "old" FreeBSD, that
>> > would be the way to go? (and it worked for me).
>> 
>> FreeBSD 8.x has been EOL since 2015-08-01. However, sysconf() ends up
>> using sem(4) even for new code. Maybe someone from threads@ knows more.
>> 
>> $ getconf SEM_NSEMS_MAX
>> undefined
>> 
>> $ kldload sem
>> $ getconf SEM_NSEMS_MAX
>> 30
>
> The following should fix sysconf(3):
>
> diff --git a/lib/libc/gen/sysconf.c b/lib/libc/gen/sysconf.c
> index ffd9f6b4fa7..a69f3778b64 100644
> --- a/lib/libc/gen/sysconf.c
> +++ b/lib/libc/gen/sysconf.c
> @@ -48,6 +48,7 @@ __FBSDID("$FreeBSD$");
>  #include <limits.h>
>  #include <paths.h>
>  #include <pthread.h>		/* we just need the limits */
> +#include <semaphore.h>
>  #include <time.h>
>  #include <unistd.h>
>  #include "un-namespace.h"
> @@ -299,13 +300,9 @@ do_NAME_MAX:
>  		mib[1] = CTL_P1003_1B_RTSIG_MAX;
>  		goto yesno;
>  	case _SC_SEM_NSEMS_MAX:
> -		mib[0] = CTL_P1003_1B;
> -		mib[1] = CTL_P1003_1B_SEM_NSEMS_MAX;
> -		goto yesno;
> +		return (-1);
>  	case _SC_SEM_VALUE_MAX:
> -		mib[0] = CTL_P1003_1B;
> -		mib[1] = CTL_P1003_1B_SEM_VALUE_MAX;
> -		goto yesno;
> +		return (SEM_VALUE_MAX);
>  	case _SC_SIGQUEUE_MAX:
>  		mib[0] = CTL_P1003_1B;
>  		mib[1] = CTL_P1003_1B_SIGQUEUE_MAX;

I confirm, the patch fixes Firefox 53+ build with sem(4) loaded.
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