is fork() supported?

[DJ Delorie]

>> I see four options...
>> 
>> 1. Not supported.  Sorry.
>> 
>> 2. Supported only if you have fork-able closure backings (mmap or
>>    maybe ktmpfile, but not file-backed) but this means documenting
>>    that (at least) selinux settings might affect this.  Caveat
>>    Programmer.
>> 
>> 3. Some API that says "I need this" so it can fail in a more useful
>>    way than "segfault".
>> 
>> 4. Fully supported, and we have some work to do to handle fork events.

Andrew Haley writes:
> The bug that will never die.
>
> https://bugzilla.redhat.com/show_bug.cgi?id=1249685
> https://bugzilla.redhat.com/show_bug.cgi?id=531233
> https://bugzilla.redhat.com/show_bug.cgi?id=772657

Sounds like a vote for (1) or (2) ;-)

Florian Weimer writes:
> Well, there are two ways to fix it: Avoid the need for alias mappings by
> switching to static trampolines, or create new alias mappings upon fork.
> (A third option would be kernel support for private alias mappings.  A
> fourth, get some form of explicit JIT support for SELinux.)

Sounds like a vote for (4)