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invalidate negative cache any time.

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negative cache on a class which does not have subclasses was not
invalidated, but it should be invalidated because other classes
can cache this negative cache.
[Bug #17553]
This commit is contained in:
Koichi Sasada 2021-02-19 14:57:59 +09:00
parent d260cbe295
commit 9c769575bf
Notes: git 2021-02-19 16:54:53 +09:00 
Merged: https://github.com/ruby/ruby/pull/4201
2 changed files with 16 additions and 7 deletions
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11
test/ruby/test_method_cache.rb
View file

@ -61,5 +61,16 @@ class TestMethodCache < Test::Unit::TestCase
assert_equal :c2, c3.new.foo
end
def test_negative_cache_with_and_without_subclasses
c0 = Class.new{}
c1 = Class.new(c0){}
c0.new.foo rescue nil
c1.new.foo rescue nil
c1.module_eval{ def foo = :c1 }
c0.module_eval{ def foo = :c0 }
assert_equal :c0, c0.new.foo
end
end

12
vm_method.c
View file

@ -129,17 +129,15 @@ rb_clear_constant_cache(void)
}
static void
invalidate_negative_cache(ID mid, bool invalidate_cme)
invalidate_negative_cache(ID mid)
{
const rb_callable_method_entry_t *cme;
rb_vm_t *vm = GET_VM();
if (rb_id_table_lookup(vm->negative_cme_table, mid, (VALUE *)&cme)) {
rb_id_table_delete(vm->negative_cme_table, mid);
if (invalidate_cme) {
vm_cme_invalidate((rb_callable_method_entry_t *)cme);
RB_DEBUG_COUNTER_INC(cc_invalidate_negative);
}
vm_cme_invalidate((rb_callable_method_entry_t *)cme);
RB_DEBUG_COUNTER_INC(cc_invalidate_negative);
}
}
@ -162,7 +160,7 @@ clear_method_cache_by_id_in_class(VALUE klass, ID mid)
// invalidate CCs
if (cc_tbl && rb_id_table_lookup(cc_tbl, mid, (VALUE *)&ccs)) {
if (NIL_P(ccs->cme->owner)) invalidate_negative_cache(mid, false);
if (NIL_P(ccs->cme->owner)) invalidate_negative_cache(mid);
rb_vm_ccs_free(ccs);
rb_id_table_delete(cc_tbl, mid);
RB_DEBUG_COUNTER_INC(cc_invalidate_leaf_ccs);
@ -211,7 +209,7 @@ clear_method_cache_by_id_in_class(VALUE klass, ID mid)
RB_DEBUG_COUNTER_INC(cc_invalidate_tree);
}
else {
invalidate_negative_cache(mid, true);
invalidate_negative_cache(mid);
}
}
}