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Re: nss_db: protect against empty mappings
- From: Florian Weimer <fweimer at redhat dot com>
- To: DJ Delorie <dj at redhat dot com>
- Cc: Andreas Schwab <schwab at suse dot de>, carlos at redhat dot com, libc-alpha at sourceware dot org
- Date: Wed, 19 Jun 2019 18:33:11 +0200
- Subject: Re: nss_db: protect against empty mappings
- References: <xntvclbkqd.fsf@greed.delorie.com>
* DJ Delorie:
> Andreas Schwab <schwab@suse.de> writes:
>> If calling is_selinux_enabled has side effects then it cannot be elided.
>> If it doesn't, then it is pointless. Assignment to a write-only
>> variable doesn't change that.
>
> Sorry, by "side effects" I meant "the program has a runtime dependency
> on selinux.so". The program is never run so it doesn't matter what the
> function *does*. The code is intentionally overcomplicated to ensure
> gcc doesn't optimize away the call, either now or in the future.
Just print the return value, then?
Thanks,
Florian