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[release/9.0-staging][mono][gc] Fix gc descriptor computation for InlineArray structs #116951

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Merged
merged 1 commit into from
Jul 11, 2025
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[release/9.0-staging][mono][gc] Fix gc descriptor computation for InlineArray structs #116951

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8 changes: 6 additions & 2 deletions src/mono/mono/metadata/object.c
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Original file line number Diff line number Diff line change
Expand Up @@ -906,9 +906,13 @@ compute_class_bitmap (MonoClass *klass, gsize *bitmap, int size, int offset, int

guint32 field_iter = 1;
guint32 field_instance_offset = field_offset;
int field_size = 0;
// If struct has InlineArray attribute, iterate `length` times to set a bitmap
if (m_class_is_inlinearray (p))
if (m_class_is_inlinearray (p)) {
int align;
field_iter = m_class_inlinearray_value (p);
field_size = mono_type_size (field->type, &align);
}

if (field_iter > 500)
g_warning ("Large number of iterations detected when creating a GC bitmap, might affect performance.");
Expand Down Expand Up @@ -973,7 +977,7 @@ compute_class_bitmap (MonoClass *klass, gsize *bitmap, int size, int offset, int
break;
}

field_instance_offset += field_offset;
field_instance_offset += field_size;
field_iter--;
}
}
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