Backport #9463: SEGV when calling GC.start in a finalizer

• Status: Closed
• Assignee: usa (Usaku NAKAMURA)

[usa (Usaku NAKAMURA)]

minimum reproduce code:

raise_proc = proc do |id|
  GC.start
end
3.times do
  ObjectSpace.define_finalizer(Object.new, raise_proc)
end

to fix this, need to backport r33361 and r33460.

[usa (Usaku NAKAMURA)]

• Related to Bug #9205: Assertion failed: heap_pages_deferred_final == 0 added

[usa (Usaku NAKAMURA)]

• Status changed from Assigned to Closed
• % Done changed from 0 to 100

Applied in changeset r44762.

---

merge revision(s) 33361,33460: [Backport #9463]

* gc.c (slot_sweep, rb_gc_finalize_deferred)
  (rb_objspace_call_finalizer, rb_gc): run finalizers
  sequencially.  [ruby-dev:44562]

* gc.c (rb_gc_finalize_deferred, rb_objspace_call_finalizer):
  should use ATOMIC_EXCHANGE() to check the previous value.
  [ruby-dev:44596] [Bug #5439]