Extend heap only at
(1) after major GC
or
(2) after several (two times, at current) minor GC
Details in https://bugs.ruby-lang.org/issues/9607#note-9
[Bug #9607]
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* gc.c (gc_page_sweep): should not set, but add final_slots into
sweep_page->final_slots.
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clear counter at the beggining of every GC and
count promoted (infant->young) objects.
Some promotions (infant->young) are transition of promoting to old
objects. We should not count such promotions.
With this technique, we don't need to check young objects
at obj_free().
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gc_verify_internal_consistency() counts all
- live objects
- young objects (if age2 promotion)
- old objects
in all pages and compares with objspace managing counters.
* gc.c (gc_after_sweep): do gc_verify_internal_consistency()
when RGENGC_CHECK_MODE >= 2.
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* gc.c: use int for simple predicate functions instead of VALUE.
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of RVALUE_OLD_P(). clang fails to compile it because is_old is
`int' but RVALUE_OLD_P() returns VALUE.
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* gc.c (RVALUE_DEMOTE_FROM_OLD): decrement old object count.
* gc.c (RVALUE_DEMOTE_FROM_YOUNG): decrement young object count.
* gc.c (rb_gc_resurrect): increment old object count.
* gc.c (gc_marks_body): should not add old object count.
This code is completely my misunderstanding.
* gc.c (rb_gc_force_recycle): decrement young or old object count
correctly.
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* gc.c (rb_free_m_tbl): mark function as static
* method.h (rb_free_m_tbl): remove prototype
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at the major GC because AGE2Promotion changes all old objects into
young objects at major GC.
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heap_pages_increment.
For example, GC by exceeding malloc_limit can remain
heap_pages_increment.
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on RGENGC_AGE2_PROMOTION.
* gc.c (RVALUE_PROMOTE_YOUNG): decrement young object count on
YOUNG->OLD.
* gc.c (obj_free): decrement young object count when young object
freed.
* gc.c (gc_marks): should not clear young object count.
* gc.c (gc_stat_internal): GC.stat :young_object information.
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Tomb heap pages are freed pages here, so expanding heap is
not required.
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when memop type is MEMOP_TYPE_REALLOC.
GC at realloc is not well maintained.
We need a time to make it safe.
[ruby-dev:48117]
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* gc.c (objspace_malloc_increase): run full mark if 0x04 bit is
set in ruby_gc_stress. [ruby-core:62103] [Feature #9761]
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* gc.c (objspace_malloc_increase): run GC after realloc not only
malloc and calloc by GC.stress. [ruby-core:62103] [Feature #9761]
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* gc.c (garbage_collect_body): name magic numbers.
* gc.c (gc_stress_set): GC.stress accepts not only boolean but
also Fixnum.
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* gc.c (rb_gc_writebarrier): drop special case for big hash/array
[Bug #9518]
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* gc.c: no newline in messages for rb_bug, it outputs a newline
after the message.
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* gc.c (gc_verify_internal_consistency): always do nothing unless
USE_RGENGC is set, no local variable needed.
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This reverts a hunk of r40703 by ko1.
This fixes [ruby-dev:48098] [Bug #9717].
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