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Add RARRAY_LITERAL_FLAG for array literals

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Array created as literals during iseq compilation don't need a
reference count since they can never be modified. The previous
implementation would mutate the hidden array's reference count,
causing copy-on-write invalidation.

This commit adds a RARRAY_LITERAL_FLAG for arrays created through
rb_ary_literal_new. Arrays created with this flag do not have reference
count stored and just assume they have infinite number of references.

Co-authored-by: Jean Boussier <jean.boussier@gmail.com>
This commit is contained in:
Peter Zhu 2022-07-19 11:15:05 -04:00
parent b25ee69e38
commit 5871ecf956
Notes: git 2022-07-21 02:14:17 +09:00
3 changed files with 37 additions and 14 deletions
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internal/array.h
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@ -33,6 +33,7 @@ void rb_ary_cancel_sharing(VALUE ary);
size_t rb_ary_size_as_embedded(VALUE ary);
void rb_ary_make_embedded(VALUE ary);
bool rb_ary_embeddable_p(VALUE ary);
VALUE rb_ary_literal_new(long capa);
static inline VALUE rb_ary_entry_internal(VALUE ary, long offset);
static inline bool ARY_PTR_USING_P(VALUE ary);