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Only call RCLASS_SET_ALLOCATOR on T_CLASS objects

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It's invalid to set an allocator on a T_ICLASS or T_MODULE, as those use
the other fields from the union.
This commit is contained in:
John Hawthorn 2025-05-19 17:37:25 -07:00
parent e01e89f55c
commit 05cdcfcefd
Notes: git 2025-05-23 17:34:01 +00:00 
Merged: https://github.com/ruby/ruby/pull/13416
2 changed files with 5 additions and 4 deletions
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6
class.c
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@ -700,7 +700,6 @@ class_alloc(VALUE flags, VALUE klass)
RCLASS_SET_ORIGIN((VALUE)obj, (VALUE)obj);
RCLASS_SET_REFINED_CLASS((VALUE)obj, Qnil);
RCLASS_SET_ALLOCATOR((VALUE)obj, 0);
RCLASS_SET_SUBCLASSES((VALUE)obj, anchor);
@ -1044,7 +1043,9 @@ rb_mod_init_copy(VALUE clone, VALUE orig)
RBASIC_SET_CLASS(clone, rb_singleton_class_clone(orig));
rb_singleton_class_attached(METACLASS_OF(clone), (VALUE)clone);
}
RCLASS_SET_ALLOCATOR(clone, RCLASS_ALLOCATOR(orig));
if (BUILTIN_TYPE(clone) == T_CLASS) {
RCLASS_SET_ALLOCATOR(clone, RCLASS_ALLOCATOR(orig));
}
copy_tables(clone, orig);
if (RCLASS_M_TBL(orig)) {
struct clone_method_arg arg;
@ -1085,7 +1086,6 @@ rb_mod_init_copy(VALUE clone, VALUE orig)
rb_class_set_super(prev_clone_p, clone_p);
prev_clone_p = clone_p;
RCLASS_SET_CONST_TBL(clone_p, RCLASS_CONST_TBL(p), false);
RCLASS_SET_ALLOCATOR(clone_p, RCLASS_ALLOCATOR(p));
if (RB_TYPE_P(clone, T_CLASS)) {
RCLASS_SET_INCLUDER(clone_p, clone);
}

3
internal/class.h
View File

@ -667,7 +667,8 @@ RCLASS_ALLOCATOR(VALUE klass)
static inline void
RCLASS_SET_ALLOCATOR(VALUE klass, rb_alloc_func_t allocator)
{
assert(!RCLASS_SINGLETON_P(klass));
RUBY_ASSERT(RB_TYPE_P(klass, T_CLASS));
RUBY_ASSERT(!RCLASS_SINGLETON_P(klass));
RCLASS_EXT_PRIME(klass)->as.class.allocator = allocator; // Allocator is set only on the initial definition
}