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From: Eric Wong <normalperson@yhbt.net>
To: ruby-core@ruby-lang.org
Cc: unicorn-public@yhbt.net
Subject: Re: [ruby-core:99184] [Ruby master Bug#17023] How to prevent String memory to be relocated in ruby-ffi
Date: Wed, 15 Jul 2020 23:35:40 +0000	[thread overview]
Message-ID: <20200715233540.GA14457@dcvr> (raw)
In-Reply-To: <redmine.journal-86563.20200715200039.5550@ruby-lang.org>

tenderlove@ruby-lang.org wrote:
> Right, that makes sense.  I really need to document this (and
> I apologize for not doing so already), but
> `rb_gc_register_address` will pin your objects.  When you know
> you're done with the reference, you can release it with
> `rb_gc_unregister_address`.  Of course if you don't call the
> unregister function, the reference will stay alive forever.

Btw, does rb_gc_register_mark_object pin?  A quick glance at
gc.c tells me it doesn't, and I'll need to revert commit
2a6cb76d5010cb763ef5a2c305728465d15eb7c9 in unicorn:
https://yhbt.net/unicorn-public/20181226050857.6413-1-e@80x24.org/

Anyways, it takes me too long to compile Ruby so I'm back to
running whatever my distro ships.  I haven't been able to
test GC.compact at all.

> https://bugs.ruby-lang.org/issues/17023#change-86563

       reply	other threads:[~2020-07-15 23:35 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <redmine.issue-17023.20200710175402.5550@ruby-lang.org>
     [not found] ` <redmine.journal-86563.20200715200039.5550@ruby-lang.org>
2020-07-15 23:35   ` Eric Wong [this message]
2020-07-15 23:49     ` [ruby-core:99185] " Aaron Patterson
2020-07-16  0:04       ` Eric Wong

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