I noticed that who-calls doesn't work for methods in openmcl. Here is a quick hack. It appears to work for me.
;; xref-locations from swank-openmcl.lisp
(defun xref-locations (relation name &optional (inverse nil)) (flet ((function-source-location (entry) (multiple-value-bind (info name) (ccl::edit-definition-p (ccl::%db-key-from-xref-entry entry) (if (eql (ccl::xref-entry-type entry) 'macro) 'function (ccl::xref-entry-type entry))) (cond ((not info) (list :error (format nil "No source info available for ~A" (ccl::xref-entry-name entry)))) ((typep (caar info) 'ccl::method) `(:location (:file ,(remove-filename-quoting (namestring (translate-logical-pathname (cdr (car info)))))) (:method ,(princ-to-string (ccl::method-name (caar info))) ,(mapcar 'princ-to-string (mapcar #'specializer-name (ccl::method-specializers (caar info)))) ,@(mapcar 'princ-to-string (ccl::method-qualifiers (caar info)))) nil)) (t (canonicalize-location (cdr (first info)) name)))))) (declare (dynamic-extent #'function-source-location)) (loop for xref in (if inverse (ccl::get-relation relation name :wild :exhaustive t) (ccl::get-relation relation :wild name :exhaustive t)) for function = (ccl::xref-entry-name xref) collect `((function ,function) ,(function-source-location xref)))))