From: marcandre-ruby-core@marc-andre.ca
To: ruby-core@ruby-lang.org
Subject: [ruby-core:102102] [Ruby master Bug#17543] Ractor isolation broken by `self` in shareable proc
Date: Fri, 15 Jan 2021 07:40:00 +0000 (UTC) [thread overview]
Message-ID: <redmine.issue-17543.20210115073958.182@ruby-lang.org> (raw)
In-Reply-To: redmine.issue-17543.20210115073958.182@ruby-lang.org
Issue #17543 has been reported by marcandre (Marc-Andre Lafortune).
----------------------------------------
Bug #17543: Ractor isolation broken by `self` in shareable proc
https://bugs.ruby-lang.org/issues/17543
* Author: marcandre (Marc-Andre Lafortune)
* Status: Open
* Priority: Normal
* Assignee: ko1 (Koichi Sasada)
* ruby -v: 3.0.0p0
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN
----------------------------------------
Discussing with @MaxLap we realized that the `self` in a shareable proc is not properly isolated:
```
class Foo
attr_accessor :x
def pr
Ractor.make_shareable(Proc.new { self })
end
end
f = Foo.new
f.x = [1, 2, 3]
Ractor.new(f.pr) { |pr| pr.call.x << :oops }
p f.x # => [1, 2, 3, :oops]
```
If the `self` refers to a shareable object then it's fine, but for non-shareable objects it has to be reset to `nil` or to a global shareable object that would have an instructive `inspect`.
```ruby
Ractor::DETACHED_SELF = Object.new
def << Ractor::DETACHED_SELF
def inspect
'<#detached self>'
end
alias to_s inspect
end
Ractor::DETACHED_SELF.freeze
```
--
https://bugs.ruby-lang.org/
next parent reply other threads:[~2021-01-15 7:40 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-15 7:40 marcandre-ruby-core [this message]
2021-01-15 18:54 ` [ruby-core:102106] [Ruby master Bug#17543] Ractor isolation broken by `self` in shareable proc eregontp
2021-01-16 0:55 ` [ruby-core:102110] " marcandre-ruby-core
2021-01-16 14:40 ` [ruby-core:102112] " eregontp
2021-01-16 16:41 ` [ruby-core:102114] " marcandre-ruby-core
2021-01-16 18:00 ` [ruby-core:102115] " eregontp
2021-01-16 23:45 ` [ruby-core:102117] " marcandre-ruby-core
2021-01-22 16:23 ` [ruby-core:102193] " hunter_spawn
2021-01-22 17:17 ` [ruby-core:102195] " marcandre-ruby-core
2021-01-22 18:00 ` [ruby-core:102196] " eregontp
2021-01-29 9:19 ` [ruby-core:102294] " ko1
2021-01-29 12:31 ` [ruby-core:102300] " eregontp
2021-01-29 15:06 ` [ruby-core:102304] " marcandre-ruby-core
2023-08-24 20:34 ` [ruby-core:114510] " jeremyevans0 (Jeremy Evans) via ruby-core
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