[ruby-core:88797] [Ruby trunk Bug#14929] [PATCH] thread.c (do_select): fix leak on exception

Issue #14929 has been updated by nagachika (Tomoyuki Chikanaga).

Backport changed from 2.3: REQUIRED, 2.4: DONE, 2.5: REQUIRED to 2.3: REQUIRED, 2.4: DONE, 2.5: DONE

ruby_2_5 r64605 merged revision(s) 64007,64019,64020.

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Bug #14929: [PATCH] thread.c (do_select): fix leak on exception
https://bugs.ruby-lang.org/issues/14929#change-73838

* Author: normalperson (Eric Wong)
* Status: Closed
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 
* Backport: 2.3: REQUIRED, 2.4: DONE, 2.5: DONE
----------------------------------------
```
thread.c (do_select): fix leak on exception

When do_select is interrupted and raise happens from
RUBY_VM_CHECK_INTS_BLOCKING, the original FD sets we copied
do not get freed, leading to a memory leak.  Wrap up all the
FD sets into a Ruby object to ensure the GC can release an
allocations made for rb_fdset_t.

This leak existed since Ruby 2.0.0 (r36430)
```


I found this bug because I was tracking down a problem
while working on timer-thread elimination.


---Files--------------------------------
0001-thread.c-do_select-fix-leak-on-exception.patch (3.87 KB)


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