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Fix memory leak of Ractor basket when sending to closed Ractor

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The following script leaks memory:

    r = Ractor.new { }
    r.value

    10.times do
      100_000.times do
        r.send(123)
      rescue Ractor::ClosedError
      end

      puts `ps -o rss= -p #{$$}`
    end

Before:

    18508
    25420
    32460
    40012
    47308
    54092
    61132
    68300
    75724
    83020

After:

    11432
    11432
    11432
    11432
    11432
    11432
    11432
    11432
    11432
    11688
This commit is contained in:
Peter Zhu 2025-06-11 13:59:38 -04:00
parent a74c385208
commit d55c463d56
Notes: git 2025-06-12 14:02:57 +00:00 
Merged: https://github.com/ruby/ruby/pull/13590
1 changed files with 1 additions and 0 deletions
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1
ractor_sync.c
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@ -1197,6 +1197,7 @@ ractor_send_basket(rb_execution_context_t *ec, const struct ractor_port *rp, str
RUBY_DEBUG_LOG("closed:%u@r%u", (unsigned int)ractor_port_id(rp), rb_ractor_id(rp->r));
if (raise_on_error) {
ractor_basket_free(b);
rb_raise(rb_eRactorClosedError, "The port was already closed");
}
}