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[ruby/stringio] Update write-barrier at copying

Browse Source 
http://ci.rvm.jp/results/trunk-asserts@ruby-sp2-docker/4552803

```
verify_internal_consistency_reachable_i: WB miss (O->Y) 0x00007f752ddd5550 [3LM    ] strio (StringIO)strio -> 0x00007f752d19b7d0 [0      ] T_STRING (String) len: 8, capa: 15 "to_strio"
<internal:/tmp/ruby/src/trunk-asserts/lib/rubygems/core_ext/kernel_require.rb>:53: [BUG] gc_verify_internal_consistency: found internal inconsistency.
```

https://github.com/ruby/stringio/commit/2e8ab43cba
This commit is contained in:
Nobuyoshi Nakada 2023-05-03 14:19:17 +09:00 committed by git
parent 32cc6301b3
commit 409a13e9ea
1 changed files with 7 additions and 3 deletions
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10
ext/stringio/stringio.c
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@ -698,15 +698,19 @@ strio_eof(VALUE self)
static VALUE
strio_copy(VALUE copy, VALUE orig)
{
struct StringIO *ptr;
struct StringIO *ptr, *old_ptr;
VALUE old_string = Qundef;
orig = rb_convert_type(orig, T_DATA, "StringIO", "to_strio");
if (copy == orig) return copy;
ptr = StringIO(orig);
if (check_strio(copy)) {
strio_free(DATA_PTR(copy));
old_ptr = check_strio(copy);
if (old_ptr) {
old_string = old_ptr->string;
strio_free(old_ptr);
}
DATA_PTR(copy) = ptr;
RB_OBJ_WRITTEN(copy, old_string, ptr->string);
RBASIC(copy)->flags &= ~STRIO_READWRITE;
RBASIC(copy)->flags |= RBASIC(orig)->flags & STRIO_READWRITE;
++ptr->count;