mark_specpdl     4624 src/lisp.h     extern void mark_specpdl (union specbinding *first, union specbinding *ptr);
mark_specpdl      656 src/thread.c     mark_specpdl (thread->m_specpdl, thread->m_specpdl_ptr);
mark_specpdl     4047 test/manual/etags/c-src/emacs/src/lisp.h extern void mark_specpdl (void);