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[ruby/mmtk] Check that a and b are valid objects in write barrier

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https://github.com/ruby/mmtk/commit/350625ebb3
This commit is contained in:
Peter Zhu 2026-01-05 18:32:02 -05:00 committed by git
parent 08f6b8673a
commit 1abb609d66
1 changed files with 12 additions and 0 deletions
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12
gc/mmtk/mmtk.c
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@ -963,6 +963,18 @@ rb_gc_impl_writebarrier(void *objspace_ptr, VALUE a, VALUE b)
if (SPECIAL_CONST_P(b)) return;
#ifdef MMTK_DEBUG
if (!rb_gc_impl_pointer_to_heap_p(objspace_ptr, (void *)a)) {
char buff[256];
rb_bug("a: %s is not an object", rb_raw_obj_info(buff, 256, a));
}
if (!rb_gc_impl_pointer_to_heap_p(objspace_ptr, (void *)b)) {
char buff[256];
rb_bug("b: %s is not an object", rb_raw_obj_info(buff, 256, b));
}
#endif
mmtk_object_reference_write_post(cache->mutator, (MMTk_ObjectReference)a);
}