0.7.1.3:
[sbcl.git] / src / code / debug-int.lisp
index 3996f93..83c7872 100644 (file)
                     (invalid-value-debug-var condition)
                     (invalid-value-frame condition)))))
 
-(define-condition ambiguous-variable-name (debug-condition)
-  ((name :reader ambiguous-variable-name-name :initarg :name)
-   (frame :reader ambiguous-variable-name-frame :initarg :frame))
+(define-condition ambiguous-var-name (debug-condition)
+  ((name :reader ambiguous-var-name-name :initarg :name)
+   (frame :reader ambiguous-var-name-frame :initarg :frame))
   (:report (lambda (condition stream)
             (format stream "~&~S names more than one valid variable in ~S."
-                    (ambiguous-variable-name-name condition)
-                    (ambiguous-variable-name-frame condition)))))
+                    (ambiguous-var-name-name condition)
+                    (ambiguous-var-name-frame condition)))))
 \f
 ;;;; errors and DEBUG-SIGNAL
 
 (defstruct (debug-var (:constructor nil)
                      (:copier nil))
   ;; the name of the variable
-  (symbol (required-argument) :type symbol)
+  (symbol (missing-arg) :type symbol)
   ;; a unique integer identification relative to other variables with the same
   ;; symbol
-  (id 0 :type sb!c::index)
+  (id 0 :type index)
   ;; Does the variable always have a valid value?
   (alive-p nil :type boolean))
 (def!method print-object ((debug-var debug-var) stream)
   (print-unreadable-object (debug-var stream :type t :identity t)
     (format stream
-           "~S ~D"
+           "~S ~W"
            (debug-var-symbol debug-var)
            (debug-var-id debug-var))))
 
                          (symbol id alive-p sc-offset save-sc-offset))
            (:copier nil))
   ;; storage class and offset (unexported)
-  (sc-offset nil :type sb!c::sc-offset)
+  (sc-offset nil :type sb!c:sc-offset)
   ;; storage class and offset when saved somewhere
-  (save-sc-offset nil :type (or sb!c::sc-offset null)))
+  (save-sc-offset nil :type (or sb!c:sc-offset null)))
 
 ;;;; frames
 
   (elsewhere-p nil :type boolean))
 (def!method print-object ((obj debug-block) str)
   (print-unreadable-object (obj str :type t)
-    (prin1 (debug-block-function-name obj) str)))
+    (prin1 (debug-block-fun-name obj) str)))
 
 #!+sb-doc
 (setf (fdocumentation 'debug-block-successors 'function)
   ;; This is the component in which the breakpoint lies.
   component
   ;; This is the byte offset into the component.
-  (offset nil :type sb!c::index)
+  (offset nil :type index)
   ;; The original instruction replaced by the breakpoint.
   (instruction nil :type (or null (unsigned-byte 32)))
   ;; A list of user breakpoints at this location.
            (breakpoint-data-offset obj))))
 
 (defstruct (breakpoint (:constructor %make-breakpoint
-                                    (hook-function what kind %info))
+                                    (hook-fun what kind %info))
                       (:copier nil))
   ;; This is the function invoked when execution encounters the
   ;; breakpoint. It takes a frame, the breakpoint, and optionally a
-  ;; list of values. Values are supplied for :FUN-END breakpoints
-  ;; as values to return for the function containing the breakpoint.
-  ;; :FUN-END breakpoint hook-functions also take a cookie
-  ;; argument. See COOKIE-FUN slot.
-  (hook-function nil :type function)
+  ;; list of values. Values are supplied for :FUN-END breakpoints as
+  ;; values to return for the function containing the breakpoint.
+  ;; :FUN-END breakpoint hook functions also take a cookie argument.
+  ;; See the COOKIE-FUN slot.
+  (hook-fun (required-arg) :type function)
   ;; CODE-LOCATION or DEBUG-FUN
   (what nil :type (or code-location debug-fun))
   ;; :CODE-LOCATION, :FUN-START, or :FUN-END for that kind
   ;; for identifying :FUN-END breakpoint executions. That is, if
   ;; there is one :FUN-END breakpoint, but there may be multiple
   ;; pending calls of its function on the stack. This function takes
-  ;; the cookie, and the hook-function takes the cookie too.
+  ;; the cookie, and the hook function takes the cookie too.
   (cookie-fun nil :type (or null function))
   ;; This slot users can set with whatever information they find useful.
   %info)
   ;; the DEBUG-FUN containing this CODE-LOCATION
   (debug-fun nil :type debug-fun)
   ;; This is initially :UNSURE. Upon first trying to access an
-  ;; :unparsed slot, if the data is unavailable, then this becomes t,
+  ;; :UNPARSED slot, if the data is unavailable, then this becomes T,
   ;; and the code-location is unknown. If the data is available, this
-  ;; becomes nil, a known location. We can't use a separate type
+  ;; becomes NIL, a known location. We can't use a separate type
   ;; code-location for this since we must return code-locations before
   ;; we can tell whether they're known or unknown. For example, when
   ;; parsing the stack, we don't want to unpack all the variables and
   ;; out and just find it in the blocks cache in DEBUG-FUN.
   (%debug-block :unparsed :type (or debug-block (member :unparsed)))
   ;; This is the number of forms processed by the compiler or loader
-  ;; before the top-level form containing this code-location.
-  (%tlf-offset :unparsed :type (or sb!c::index (member :unparsed)))
+  ;; before the top level form containing this code-location.
+  (%tlf-offset :unparsed :type (or index (member :unparsed)))
   ;; This is the depth-first number of the node that begins
-  ;; code-location within its top-level form.
-  (%form-number :unparsed :type (or sb!c::index (member :unparsed))))
+  ;; code-location within its top level form.
+  (%form-number :unparsed :type (or index (member :unparsed))))
 (def!method print-object ((obj code-location) str)
   (print-unreadable-object (obj str :type t)
     (prin1 (debug-fun-name (code-location-debug-fun obj))
            (:constructor make-compiled-code-location (pc debug-fun))
            (:copier nil))
   ;; an index into DEBUG-FUN's component slot
-  (pc nil :type sb!c::index)
+  (pc nil :type index)
   ;; a bit-vector indexed by a variable's position in
   ;; DEBUG-FUN-DEBUG-VARS indicating whether the variable has a
   ;; valid value at this code-location. (unexported).
 \f
 ;;;; DEBUG-SOURCEs
 
-;;; Return the number of top-level forms processed by the compiler
+;;; Return the number of top level forms processed by the compiler
 ;;; before compiling this source. If this source is uncompiled, this
 ;;; is zero. This may be zero even if the source is compiled since the
 ;;; first form in the first file compiled in one compilation, for
 ;;; example, must have a root number of zero -- the compiler saw no
-;;; other top-level forms before it.
+;;; other top level forms before it.
 (defun debug-source-root-number (debug-source)
   (sb!c::debug-source-source-root debug-source))
 \f
        (zerop (logand (sap-int x) #b11))))
 
 #!+x86
-(sb!alien:def-alien-routine component-ptr-from-pc (system-area-pointer)
+(sb!alien:define-alien-routine component-ptr-from-pc (system-area-pointer)
   (pc system-area-pointer))
 
 #!+x86
   (let ((component-ptr (component-ptr-from-pc pc)))
     (unless (sap= component-ptr (int-sap #x0))
        (let* ((code (component-from-component-ptr component-ptr))
-             (code-header-len (* (get-header-data code) sb!vm:word-bytes))
+             (code-header-len (* (get-header-data code) sb!vm:n-word-bytes))
              (pc-offset (- (sap-int pc)
                            (- (get-lisp-obj-address code)
                               sb!vm:other-pointer-lowtag)
     nil)
    (t
     ;; Check the two possible frame pointers.
-    (let ((lisp-ocfp (sap-ref-sap fp (- (* (1+ sb!vm::ocfp-save-offset) 4))))
-         (lisp-ra (sap-ref-sap fp (- (* (1+ sb!vm::return-pc-save-offset)
+    (let ((lisp-ocfp (sap-ref-sap fp (- (* (1+ ocfp-save-offset) 4))))
+         (lisp-ra (sap-ref-sap fp (- (* (1+ return-pc-save-offset)
                                         4))))
-         (c-ocfp (sap-ref-sap fp (* 0 sb!vm:word-bytes)))
-         (c-ra (sap-ref-sap fp (* 1 sb!vm:word-bytes))))
+         (c-ocfp (sap-ref-sap fp (* 0 sb!vm:n-word-bytes)))
+         (c-ra (sap-ref-sap fp (* 1 sb!vm:n-word-bytes))))
       (cond ((and (sap> lisp-ocfp fp) (cstack-pointer-valid-p lisp-ocfp)
                  (ra-pointer-valid-p lisp-ra)
                  (sap> c-ocfp fp) (cstack-pointer-valid-p c-ocfp)
 ;;; Return the top frame of the control stack as it was before calling
 ;;; this function.
 (defun top-frame ()
-  (/show0 "entering TOP-FRAME")
+  (/noshow0 "entering TOP-FRAME")
   (multiple-value-bind (fp pc) (%caller-frame-and-pc)
     (compute-calling-frame (descriptor-sap fp) pc nil)))
 
 ;;; Return the frame immediately below FRAME on the stack; or when
 ;;; FRAME is the bottom of the stack, return NIL.
 (defun frame-down (frame)
-  (/show0 "entering FRAME-DOWN")
+  (/noshow0 "entering FRAME-DOWN")
   ;; We have to access the old-fp and return-pc out of frame and pass
   ;; them to COMPUTE-CALLING-FRAME.
   (let ((down (frame-%down frame)))
     (if (eq down :unparsed)
        (let ((debug-fun (frame-debug-fun frame)))
-         (/show0 "in DOWN :UNPARSED case")
+         (/noshow0 "in DOWN :UNPARSED case")
          (setf (frame-%down frame)
                (etypecase debug-fun
                  (compiled-debug-fun
                     (compute-calling-frame
                      (descriptor-sap
                       (get-context-value
-                       frame sb!vm::ocfp-save-offset
+                       frame ocfp-save-offset
                        (sb!c::compiled-debug-fun-old-fp c-d-f)))
                      (get-context-value
-                      frame sb!vm::lra-save-offset
+                      frame lra-save-offset
                       (sb!c::compiled-debug-fun-return-pc c-d-f))
                      frame)))
                  (bogus-debug-fun
                        #!-x86
                       (compute-calling-frame
                        #!-alpha
-                       (sap-ref-sap fp (* sb!vm::ocfp-save-offset
-                                          sb!vm:word-bytes))
+                       (sap-ref-sap fp (* ocfp-save-offset
+                                          sb!vm:n-word-bytes))
                        #!+alpha
                        (int-sap
-                        (sap-ref-32 fp (* sb!vm::ocfp-save-offset
-                                          sb!vm:word-bytes)))
+                        (sap-ref-32 fp (* ocfp-save-offset
+                                          sb!vm:n-word-bytes)))
 
-                       (stack-ref fp sb!vm::lra-save-offset)
+                       (stack-ref fp lra-save-offset)
 
                        frame)))))))
        down)))
 #!-x86
 (defun get-context-value (frame stack-slot loc)
   (declare (type compiled-frame frame) (type unsigned-byte stack-slot)
-          (type sb!c::sc-offset loc))
+          (type sb!c:sc-offset loc))
   (let ((pointer (frame-pointer frame))
        (escaped (compiled-frame-escaped frame)))
     (if escaped
 #!+x86
 (defun get-context-value (frame stack-slot loc)
   (declare (type compiled-frame frame) (type unsigned-byte stack-slot)
-          (type sb!c::sc-offset loc))
+          (type sb!c:sc-offset loc))
   (let ((pointer (frame-pointer frame))
        (escaped (compiled-frame-escaped frame)))
     (if escaped
        (sub-access-debug-var-slot pointer loc escaped)
        (ecase stack-slot
-         (#.sb!vm::ocfp-save-offset
+         (#.ocfp-save-offset
           (stack-ref pointer stack-slot))
-         (#.sb!vm::lra-save-offset
+         (#.lra-save-offset
           (sap-ref-sap pointer (- (* (1+ stack-slot) 4))))))))
 
 #!-x86
 (defun (setf get-context-value) (value frame stack-slot loc)
   (declare (type compiled-frame frame) (type unsigned-byte stack-slot)
-          (type sb!c::sc-offset loc))
+          (type sb!c:sc-offset loc))
   (let ((pointer (frame-pointer frame))
        (escaped (compiled-frame-escaped frame)))
     (if escaped
 #!+x86
 (defun (setf get-context-value) (value frame stack-slot loc)
   (declare (type compiled-frame frame) (type unsigned-byte stack-slot)
-          (type sb!c::sc-offset loc))
+          (type sb!c:sc-offset loc))
   (let ((pointer (frame-pointer frame))
        (escaped (compiled-frame-escaped frame)))
     (if escaped
        (sub-set-debug-var-slot pointer loc value escaped)
        (ecase stack-slot
-         (#.sb!vm::ocfp-save-offset
+         (#.ocfp-save-offset
           (setf (stack-ref pointer stack-slot) value))
-         (#.sb!vm::lra-save-offset
+         (#.lra-save-offset
           (setf (sap-ref-sap pointer (- (* (1+ stack-slot) 4))) value))))))
 
 ;;; This returns a frame for the one existing in time immediately
 ;;; prior to the frame referenced by current-fp. This is current-fp's
 ;;; caller or the next frame down the control stack. If there is no
-;;; down frame, this returns nil for the bottom of the stack. Up-frame
-;;; is the up link for the resulting frame object, and it is nil when
+;;; down frame, this returns NIL for the bottom of the stack. UP-FRAME
+;;; is the up link for the resulting frame object, and it is null when
 ;;; we call this to get the top of the stack.
 ;;;
 ;;; The current frame contains the pointer to the temporally previous
                (if (fixnump lra)
                    (let ((fp (frame-pointer up-frame)))
                      (values lra
-                             (stack-ref fp (1+ sb!vm::lra-save-offset))))
+                             (stack-ref fp (1+ lra-save-offset))))
                    (values (get-header-data lra)
                            (lra-code-header lra)))
              (if code
                  (values code
                          (* (1+ (- word-offset (get-header-data code)))
-                            sb!vm:word-bytes)
+                            sb!vm:n-word-bytes)
                          nil)
                  (values :foreign-function
                          0
                                                        escaped)
                                 (if up-frame (1+ (frame-number up-frame)) 0)
                                 escaped))))))
-
 #!+x86
 (defun compute-calling-frame (caller ra up-frame)
   (declare (type system-area-pointer caller ra))
-  (/show0 "entering COMPUTE-CALLING-FRAME")
+  (/noshow0 "entering COMPUTE-CALLING-FRAME")
   (when (cstack-pointer-valid-p caller)
-    (/show0 "in WHEN")
+    (/noshow0 "in WHEN")
     ;; First check for an escaped frame.
     (multiple-value-bind (code pc-offset escaped) (find-escaped-frame caller)
-      (/show0 "at COND")
+      (/noshow0 "at COND")
       (cond (code
-            (/show0 "in CODE clause")
+            (/noshow0 "in CODE clause")
             ;; If it's escaped it may be a function end breakpoint trap.
             (when (and (code-component-p code)
                        (eq (%code-debug-info code) :bogus-lra))
               (setq code (code-header-ref code real-lra-slot))
               (aver code)))
            (t
-            (/show0 "in T clause")
+            (/noshow0 "in T clause")
             ;; not escaped
             (multiple-value-setq (pc-offset code)
               (compute-lra-data-from-pc ra))
                       "bogus stack frame"))
                     (t
                      (debug-fun-from-pc code pc-offset)))))
-       (/show0 "returning MAKE-COMPILED-FRAME from COMPUTE-CALLING-FRAME")
+       (/noshow0 "returning MAKE-COMPILED-FRAME from COMPUTE-CALLING-FRAME")
        (make-compiled-frame caller up-frame d-fun
                             (code-location-from-pc d-fun pc-offset
                                                    escaped)
 #!+x86
 (defun find-escaped-frame (frame-pointer)
   (declare (type system-area-pointer frame-pointer))
-  (/show0 "entering FIND-ESCAPED-FRAME")
+  (/noshow0 "entering FIND-ESCAPED-FRAME")
   (dotimes (index *free-interrupt-context-index* (values nil 0 nil))
     (sb!alien:with-alien
        ((lisp-interrupt-contexts (array (* os-context-t) nil) :extern))
-      (/show0 "at head of WITH-ALIEN")
+      (/noshow0 "at head of WITH-ALIEN")
       (let ((context (sb!alien:deref lisp-interrupt-contexts index)))
-       (/show0 "got CONTEXT")
+       (/noshow0 "got CONTEXT")
        (when (= (sap-int frame-pointer)
                 (sb!vm:context-register context sb!vm::cfp-offset))
          (without-gcing
-          (/show0 "in WITHOUT-GCING")
+          (/noshow0 "in WITHOUT-GCING")
           (let* ((component-ptr (component-ptr-from-pc
                                  (sb!vm:context-pc context)))
                  (code (unless (sap= component-ptr (int-sap #x0))
                          (component-from-component-ptr component-ptr))))
-            (/show0 "got CODE")
+            (/noshow0 "got CODE")
             (when (null code)
               (return (values code 0 context)))
             (let* ((code-header-len (* (get-header-data code)
-                                       sb!vm:word-bytes))
+                                       sb!vm:n-word-bytes))
                    (pc-offset
                     (- (sap-int (sb!vm:context-pc context))
                        (- (get-lisp-obj-address code)
                           sb!vm:other-pointer-lowtag)
                        code-header-len)))
-              (/show "got PC-OFFSET")
+              (/noshow "got PC-OFFSET")
               (unless (<= 0 pc-offset
                           (* (code-header-ref code sb!vm:code-code-size-slot)
-                             sb!vm:word-bytes))
+                             sb!vm:n-word-bytes))
                 ;; We were in an assembly routine. Therefore, use the
                 ;; LRA as the pc.
                 ;;
                 ;; FIXME: Should this be WARN or ERROR or what?
                 (format t "** pc-offset ~S not in code obj ~S?~%"
                         pc-offset code))
-              (/show0 "returning from FIND-ESCAPED-FRAME")
+              (/noshow0 "returning from FIND-ESCAPED-FRAME")
               (return
                (values code pc-offset context))))))))))
 
             (when (symbolp code)
               (return (values code 0 scp)))
             (let* ((code-header-len (* (get-header-data code)
-                                       sb!vm:word-bytes))
+                                       sb!vm:n-word-bytes))
                    (pc-offset
                     (- (sap-int (sb!vm:context-pc scp))
                        (- (get-lisp-obj-address code)
               ;; delay slot.
               #!+(or pmax sgi) ; pmax only (and broken anyway)
               (when (logbitp 31 (sb!alien:slot scp '%mips::sc-cause))
-                (incf pc-offset sb!vm:word-bytes))
+                (incf pc-offset sb!vm:n-word-bytes))
               (unless (<= 0 pc-offset
                           (* (code-header-ref code sb!vm:code-code-size-slot)
-                             sb!vm:word-bytes))
+                             sb!vm:n-word-bytes))
                 ;; We were in an assembly routine. Therefore, use the
                 ;; LRA as the pc.
                 (setf pc-offset
     (if (functionp object)
        (or (fun-code-header object)
            :undefined-function)
-       (let ((lowtag (get-lowtag object)))
+       (let ((lowtag (lowtag-of object)))
          (if (= lowtag sb!vm:other-pointer-lowtag)
-             (let ((type (get-type object)))
-               (cond ((= type sb!vm:code-header-widetag)
+             (let ((widetag (widetag-of object)))
+               (cond ((= widetag sb!vm:code-header-widetag)
                       object)
-                     ((= type sb!vm:return-pc-header-widetag)
+                     ((= widetag sb!vm:return-pc-header-widetag)
                       (lra-code-header object))
                      (t
                       nil))))))))
 \f
 ;;;; frame utilities
 
-;;; This returns a COMPILED-DEBUG-FUN for code and pc. We fetch the
+;;; This returns a COMPILED-DEBUG-FUN for COMPONENT and PC. We fetch the
 ;;; SB!C::DEBUG-INFO and run down its FUN-MAP to get a
-;;; SB!C::COMPILED-DEBUG-FUN from the pc. The result only needs to
-;;; reference the component, for function constants, and the
+;;; SB!C::COMPILED-DEBUG-FUN from the PC. The result only needs to
+;;; reference the COMPONENT, for function constants, and the
 ;;; SB!C::COMPILED-DEBUG-FUN.
 (defun debug-fun-from-pc (component pc)
   (let ((info (%code-debug-info component)))
      ((eq info :bogus-lra)
       (make-bogus-debug-fun "function end breakpoint"))
      (t
-      (let* ((fun-map (get-debug-info-fun-map info))
+      (let* ((fun-map (sb!c::compiled-debug-info-fun-map info))
             (len (length fun-map)))
        (declare (type simple-vector fun-map))
        (if (= len 1)
 ;;; CODE-LOCATIONs at which execution would continue with frame as the
 ;;; top frame if someone threw to the corresponding tag.
 (defun frame-catches (frame)
-  (let ((catch (descriptor-sap *current-catch-block*))
-       (res nil)
+  (let ((catch (descriptor-sap sb!vm:*current-catch-block*))
+       (reversed-result nil)
        (fp (frame-pointer frame)))
-    (loop
-      (when (zerop (sap-int catch)) (return (nreverse res)))
-      (when (sap= fp
-                 #!-alpha
-                 (sap-ref-sap catch
-                                     (* sb!vm:catch-block-current-cont-slot
-                                        sb!vm:word-bytes))
-                 #!+alpha
-                 (:int-sap
-                  (sap-ref-32 catch
-                                     (* sb!vm:catch-block-current-cont-slot
-                                        sb!vm:word-bytes))))
-       (let* (#!-x86
-              (lra (stack-ref catch sb!vm:catch-block-entry-pc-slot))
-              #!+x86
-              (ra (sap-ref-sap
-                   catch (* sb!vm:catch-block-entry-pc-slot
-                            sb!vm:word-bytes)))
-              #!-x86
-              (component
-               (stack-ref catch sb!vm:catch-block-current-code-slot))
-              #!+x86
-              (component (component-from-component-ptr
-                          (component-ptr-from-pc ra)))
-              (offset
-               #!-x86
-               (* (- (1+ (get-header-data lra))
-                     (get-header-data component))
-                  sb!vm:word-bytes)
-               #!+x86
-               (- (sap-int ra)
-                  (- (get-lisp-obj-address component)
-                     sb!vm:other-pointer-lowtag)
-                  (* (get-header-data component) sb!vm:word-bytes))))
-         (push (cons #!-x86
-                     (stack-ref catch sb!vm:catch-block-tag-slot)
-                     #!+x86
-                     (make-lisp-obj
-                      (sap-ref-32 catch (* sb!vm:catch-block-tag-slot
-                                                  sb!vm:word-bytes)))
-                     (make-compiled-code-location
-                      offset (frame-debug-fun frame)))
-               res)))
-      (setf catch
-           #!-alpha
-           (sap-ref-sap catch
-                               (* sb!vm:catch-block-previous-catch-slot
-                                  sb!vm:word-bytes))
-           #!+alpha
-           (:int-sap
-            (sap-ref-32 catch
-                               (* sb!vm:catch-block-previous-catch-slot
-                                  sb!vm:word-bytes)))))))
+    (loop until (zerop (sap-int catch))
+         finally (return (nreverse reversed-result))
+         do
+         (when (sap= fp
+                     #!-alpha
+                     (sap-ref-sap catch
+                                  (* sb!vm:catch-block-current-cont-slot
+                                     sb!vm:n-word-bytes))
+                     #!+alpha
+                     (int-sap
+                      (sap-ref-32 catch
+                                  (* sb!vm:catch-block-current-cont-slot
+                                     sb!vm:n-word-bytes))))
+           (let* (#!-x86
+                  (lra (stack-ref catch sb!vm:catch-block-entry-pc-slot))
+                  #!+x86
+                  (ra (sap-ref-sap
+                       catch (* sb!vm:catch-block-entry-pc-slot
+                                sb!vm:n-word-bytes)))
+                  #!-x86
+                  (component
+                   (stack-ref catch sb!vm:catch-block-current-code-slot))
+                  #!+x86
+                  (component (component-from-component-ptr
+                              (component-ptr-from-pc ra)))
+                  (offset
+                   #!-x86
+                   (* (- (1+ (get-header-data lra))
+                         (get-header-data component))
+                      sb!vm:n-word-bytes)
+                   #!+x86
+                   (- (sap-int ra)
+                      (- (get-lisp-obj-address component)
+                         sb!vm:other-pointer-lowtag)
+                      (* (get-header-data component) sb!vm:n-word-bytes))))
+             (push (cons #!-x86
+                         (stack-ref catch sb!vm:catch-block-tag-slot)
+                         #!+x86
+                         (make-lisp-obj
+                          (sap-ref-32 catch (* sb!vm:catch-block-tag-slot
+                                               sb!vm:n-word-bytes)))
+                         (make-compiled-code-location
+                          offset (frame-debug-fun frame)))
+                   reversed-result)))
+         (setf catch
+               #!-alpha
+               (sap-ref-sap catch
+                            (* sb!vm:catch-block-previous-catch-slot
+                               sb!vm:n-word-bytes))
+               #!+alpha
+               (int-sap
+                (sap-ref-32 catch
+                            (* sb!vm:catch-block-previous-catch-slot
+                               sb!vm:n-word-bytes)))))))
 \f
 ;;;; operations on DEBUG-FUNs
 
 ;;; nil). This may iterate over only some of DEBUG-FUN's variables or
 ;;; none depending on debug policy; for example, possibly the
 ;;; compilation only preserved argument information.
-(defmacro do-debug-fun-variables ((var debug-fun &optional result)
-                                      &body body)
+(defmacro do-debug-fun-vars ((var debug-fun &optional result) &body body)
   (let ((vars (gensym))
        (i (gensym)))
     `(let ((,vars (debug-fun-debug-vars ,debug-fun)))
 ;;; Return the name of the function represented by DEBUG-FUN. This may
 ;;; be a string or a cons; do not assume it is a symbol.
 (defun debug-fun-name (debug-fun)
+  (declare (type debug-fun debug-fun))
   (etypecase debug-fun
     (compiled-debug-fun
      (sb!c::compiled-debug-fun-name
 ;;; Return a DEBUG-FUN that represents debug information for FUN.
 (defun fun-debug-fun (fun)
   (declare (type function fun))
-  (ecase (get-type fun)
+  (ecase (widetag-of fun)
     (#.sb!vm:closure-header-widetag
      (fun-debug-fun (%closure-fun fun)))
     (#.sb!vm:funcallable-instance-header-widetag
                     (and (sb!c::compiled-debug-fun-p x)
                          (eq (sb!c::compiled-debug-fun-name x) name)
                          (eq (sb!c::compiled-debug-fun-kind x) nil)))
-                  (get-debug-info-fun-map
+                  (sb!c::compiled-debug-info-fun-map
                    (%code-debug-info component)))))
        (if res
            (make-compiled-debug-fun res component)
            (debug-fun-from-pc component
                               (* (- (fun-word-offset fun)
                                     (get-header-data component))
-                                 sb!vm:word-bytes)))))))
+                                 sb!vm:n-word-bytes)))))))
 
 ;;; Return the kind of the function, which is one of :OPTIONAL,
-;;; :EXTERNAL, TOP-level, :CLEANUP, or NIL.
+;;; :EXTERNAL, :TOPLEVEL, :CLEANUP, or NIL.
 (defun debug-fun-kind (debug-fun)
   ;; FIXME: This "is one of" information should become part of the function
   ;; declamation, not just a doc string
 ;;; as symbol. The result of this function is limited to the
 ;;; availability of variable information in DEBUG-FUN; for
 ;;; example, possibly DEBUG-FUN only knows about its arguments.
-(defun debug-fun-symbol-variables (debug-fun symbol)
+(defun debug-fun-symbol-vars (debug-fun symbol)
   (let ((vars (ambiguous-debug-vars debug-fun (symbol-name symbol)))
        (package (and (symbol-package symbol)
                      (package-name (symbol-package symbol)))))
     (if variables
        (let* ((len (length variables))
               (prefix-len (length name-prefix-string))
-              (pos (find-variable name-prefix-string variables len))
+              (pos (find-var name-prefix-string variables len))
               (res nil))
          (when pos
            ;; Find names from pos to variable's len that contain prefix.
            (setq res (nreverse res)))
          res))))
 
-;;; This returns a position in variables for one containing name as an
-;;; initial substring. End is the length of variables if supplied.
-(defun find-variable (name variables &optional end)
+;;; This returns a position in VARIABLES for one containing NAME as an
+;;; initial substring. END is the length of VARIABLES if supplied.
+(defun find-var (name variables &optional end)
   (declare (simple-vector variables)
           (simple-string name))
   (let ((name-len (length name)))
     (position name variables
-             :test #'(lambda (x y)
-                       (let* ((y (debug-var-symbol-name y))
-                              (y-len (length y)))
-                         (declare (simple-string y))
-                         (and (>= y-len name-len)
-                              (string= x y :end1 name-len :end2 name-len))))
+             :test (lambda (x y)
+                     (let* ((y (debug-var-symbol-name y))
+                            (y-len (length y)))
+                       (declare (simple-string y))
+                       (and (>= y-len name-len)
+                            (string= x y :end1 name-len :end2 name-len))))
              :end (or end (length variables)))))
 
 ;;; Return a list representing the lambda-list for DEBUG-FUN. The
           (debug-signal 'no-debug-blocks
                         :debug-fun debug-fun)))))
 
-;;; This returns a SIMPLE-VECTOR of DEBUG-BLOCKs or NIL. NIL indicates
-;;; there was no basic block information.
+;;; Return a SIMPLE-VECTOR of DEBUG-BLOCKs or NIL. NIL indicates there
+;;; was no basic block information.
 (defun parse-debug-blocks (debug-fun)
   (etypecase debug-fun
     (compiled-debug-fun
 
 ;;; This does some of the work of PARSE-DEBUG-BLOCKS.
 (defun parse-compiled-debug-blocks (debug-fun)
-  (let* ((debug-fun (compiled-debug-fun-compiler-debug-fun
-                    debug-fun))
-        (var-count (length (debug-fun-debug-vars debug-fun)))
-        (blocks (sb!c::compiled-debug-fun-blocks debug-fun))
+  (let* ((var-count (length (debug-fun-debug-vars debug-fun)))
+        (compiler-debug-fun (compiled-debug-fun-compiler-debug-fun
+                             debug-fun))
+        (blocks (sb!c::compiled-debug-fun-blocks compiler-debug-fun))
         ;; KLUDGE: 8 is a hard-wired constant in the compiler for the
         ;; element size of the packed binary representation of the
         ;; blocks data.
         (live-set-len (ceiling var-count 8))
-        (tlf-number (sb!c::compiled-debug-fun-tlf-number debug-fun)))
-    (unless blocks (return-from parse-compiled-debug-blocks nil))
+        (tlf-number (sb!c::compiled-debug-fun-tlf-number compiler-debug-fun)))
+    (unless blocks
+      (return-from parse-compiled-debug-blocks nil))
     (macrolet ((aref+ (a i) `(prog1 (aref ,a ,i) (incf ,i))))
       (with-parsing-buffer (blocks-buffer locations-buffer)
        (let ((i 0)
 (defun assign-minimal-var-names (vars)
   (declare (simple-vector vars))
   (let* ((len (length vars))
-        (width (length (format nil "~D" (1- len)))))
+        (width (length (format nil "~W" (1- len)))))
     (dotimes (i len)
       (setf (compiled-debug-var-symbol (svref vars i))
            (intern (format nil "ARG-~V,'0D" width i)
 (defun parse-compiled-debug-vars (debug-fun)
   (let* ((cdebug-fun (compiled-debug-fun-compiler-debug-fun
                      debug-fun))
-        (packed-vars (sb!c::compiled-debug-fun-variables cdebug-fun))
+        (packed-vars (sb!c::compiled-debug-fun-vars cdebug-fun))
         (args-minimal (eq (sb!c::compiled-debug-fun-arguments cdebug-fun)
                           :minimal)))
     (when packed-vars
                                                         save-sc-offset)
                                buffer)))))))
 \f
-;;;; unpacking minimal debug functions
-
-;;; Return a FUN-MAP for a given COMPILED-DEBUG-INFO object.
-(defun get-debug-info-fun-map (info)
-  (declare (type sb!c::compiled-debug-info info))
-  (let ((map (sb!c::compiled-debug-info-fun-map info)))
-    ;; The old CMU CL had various hairy possibilities here, but in
-    ;; SBCL we only use this one, right? 
-    (aver (simple-vector-p map))
-    ;; So it's easy..
-    map))
-\f
 ;;;; CODE-LOCATIONs
 
 ;;; If we're sure of whether code-location is known, return T or NIL.
                                  0)))
                       (svref blocks (1- end)))
                      (t last))))
-               (declare (type sb!c::index i end))
+               (declare (type index i end))
                (when (< pc
                         (compiled-code-location-pc
                          (svref (compiled-debug-block-code-locations
           (car sources)
           (do ((prev sources src)
                (src (cdr sources) (cdr src))
-               (offset (code-location-top-level-form-offset code-location)))
+               (offset (code-location-toplevel-form-offset code-location)))
               ((null src) (car prev))
             (when (< offset (sb!c::debug-source-source-root (car src)))
               (return (car prev)))))))
     ;; did special tricks to debug the IR1 interpreter.)
     ))
 
-;;; Returns the number of top-level forms before the one containing
+;;; Returns the number of top level forms before the one containing
 ;;; CODE-LOCATION as seen by the compiler in some compilation unit. (A
 ;;; compilation unit is not necessarily a single file, see the section
 ;;; on debug-sources.)
-(defun code-location-top-level-form-offset (code-location)
+(defun code-location-toplevel-form-offset (code-location)
   (when (code-location-unknown-p code-location)
     (error 'unknown-code-location :code-location code-location))
   (let ((tlf-offset (code-location-%tlf-offset code-location)))
              (unless (fill-in-code-location code-location)
                ;; This check should be unnecessary. We're missing
                ;; debug info the compiler should have dumped.
-               (error "internal error: unknown code location"))
+               (bug "unknown code location"))
              (code-location-%tlf-offset code-location))
             ;; (There used to be more cases back before sbcl-0.7.0,,
             ;; when we did special tricks to debug the IR1
          (t tlf-offset))))
 
 ;;; Return the number of the form corresponding to CODE-LOCATION. The
-;;; form number is derived by a walking the subforms of a top-level
+;;; form number is derived by a walking the subforms of a top level
 ;;; form in depth-first order.
 (defun code-location-form-number (code-location)
   (when (code-location-unknown-p code-location)
              (unless (fill-in-code-location code-location)
                ;; This check should be unnecessary. We're missing
                ;; debug info the compiler should have dumped.
-               (error "internal error: unknown code location"))
+               (bug "unknown code location"))
              (code-location-%form-number code-location))
             ;; (There used to be more cases back before sbcl-0.7.0,,
             ;; when we did special tricks to debug the IR1
             ((not (fill-in-code-location code-location))
              ;; This check should be unnecessary. We're missing
              ;; debug info the compiler should have dumped.
-             (error "internal error: unknown code location"))
+             (bug "unknown code location"))
             (t
              (compiled-code-location-kind code-location)))))
     ;; (There used to be more cases back before sbcl-0.7.0,,
                 ;;
                 ;; FIXME: This error and comment happen over and over again.
                 ;; Make them a shared function.
-                (error "internal error: unknown code location"))
+                (bug "unknown code location"))
               (compiled-code-location-%live-set code-location))
              (t live-set)))))
 
        ;; interpreter.)
        ))
     ;; (There used to be more cases back before sbcl-0.7.0,,
-    ;; when we did special tricks to debug the IR1
-    ;; interpreter.)
+    ;; when we did special tricks to debug IR1-interpreted code.)
     ))
 (defun sub-compiled-code-location= (obj1 obj2)
   (= (compiled-code-location-pc obj1)
 
 ;;; Return the name of the function represented by DEBUG-FUN.
 ;;; This may be a string or a cons; do not assume it is a symbol.
-(defun debug-block-function-name (debug-block)
+(defun debug-block-fun-name (debug-block)
   (etypecase debug-block
     (compiled-debug-block
      (let ((code-locs (compiled-debug-block-code-locations debug-block)))
 ;;; GC, and might also arise in debug variable locations when
 ;;; those variables are invalid.)
 (defun make-valid-lisp-obj (val)
-  (/show0 "entering MAKE-VALID-LISP-OBJ, VAL=..")
-  #!+sb-show (/hexstr val)
   (if (or
        ;; fixnum
        (zerop (logand val 3))
            ;; routine in the C runtime support code
            (or (< sb!vm:read-only-space-start val
                   (* sb!vm:*read-only-space-free-pointer*
-                     sb!vm:word-bytes))
+                     sb!vm:n-word-bytes))
                (< sb!vm:static-space-start val
                   (* sb!vm:*static-space-free-pointer*
-                     sb!vm:word-bytes))
+                     sb!vm:n-word-bytes))
                (< sb!vm:dynamic-space-start val
                   (sap-int (dynamic-space-free-pointer))))))
       (make-lisp-obj val)
                                  (sb!vm:context-register escaped
                                                          sb!vm::nfp-offset))
                                 #!-alpha
-                                (sb!sys:sap-ref-sap fp (* sb!vm::nfp-save-offset
-                                                          sb!vm:word-bytes))
+                                (sb!sys:sap-ref-sap fp (* nfp-save-offset
+                                                          sb!vm:n-word-bytes))
                                 #!+alpha
                                 (sb!vm::make-number-stack-pointer
-                                 (sb!sys:sap-ref-32 fp (* sb!vm::nfp-save-offset
-                                                          sb!vm:word-bytes))))))
+                                 (sb!sys:sap-ref-32 fp (* nfp-save-offset
+                                                          sb!vm:n-word-bytes))))))
                   ,@body)))
     (ecase (sb!c:sc-offset-scn sc-offset)
       ((#.sb!vm:any-reg-sc-number
          (sb!sys:int-sap val)))
       (#.sb!vm:signed-reg-sc-number
        (with-escaped-value (val)
-         (if (logbitp (1- sb!vm:word-bits) val)
-             (logior val (ash -1 sb!vm:word-bits))
+         (if (logbitp (1- sb!vm:n-word-bits) val)
+             (logior val (ash -1 sb!vm:n-word-bits))
              val)))
       (#.sb!vm:unsigned-reg-sc-number
        (with-escaped-value (val)
       (#.sb!vm:single-stack-sc-number
        (with-nfp (nfp)
          (sb!sys:sap-ref-single nfp (* (sb!c:sc-offset-offset sc-offset)
-                                       sb!vm:word-bytes))))
+                                       sb!vm:n-word-bytes))))
       (#.sb!vm:double-stack-sc-number
        (with-nfp (nfp)
          (sb!sys:sap-ref-double nfp (* (sb!c:sc-offset-offset sc-offset)
-                                       sb!vm:word-bytes))))
+                                       sb!vm:n-word-bytes))))
       #!+long-float
       (#.sb!vm:long-stack-sc-number
        (with-nfp (nfp)
          (sb!sys:sap-ref-long nfp (* (sb!c:sc-offset-offset sc-offset)
-                                     sb!vm:word-bytes))))
+                                     sb!vm:n-word-bytes))))
       (#.sb!vm:complex-single-stack-sc-number
        (with-nfp (nfp)
          (complex
           (sb!sys:sap-ref-single nfp (* (sb!c:sc-offset-offset sc-offset)
-                                        sb!vm:word-bytes))
+                                        sb!vm:n-word-bytes))
           (sb!sys:sap-ref-single nfp (* (1+ (sb!c:sc-offset-offset sc-offset))
-                                        sb!vm:word-bytes)))))
+                                        sb!vm:n-word-bytes)))))
       (#.sb!vm:complex-double-stack-sc-number
        (with-nfp (nfp)
          (complex
           (sb!sys:sap-ref-double nfp (* (sb!c:sc-offset-offset sc-offset)
-                                        sb!vm:word-bytes))
+                                        sb!vm:n-word-bytes))
           (sb!sys:sap-ref-double nfp (* (+ (sb!c:sc-offset-offset sc-offset) 2)
-                                        sb!vm:word-bytes)))))
+                                        sb!vm:n-word-bytes)))))
       #!+long-float
       (#.sb!vm:complex-long-stack-sc-number
        (with-nfp (nfp)
          (complex
           (sb!sys:sap-ref-long nfp (* (sb!c:sc-offset-offset sc-offset)
-                                      sb!vm:word-bytes))
+                                      sb!vm:n-word-bytes))
           (sb!sys:sap-ref-long nfp (* (+ (sb!c:sc-offset-offset sc-offset)
                                          #!+sparc 4)
-                                      sb!vm:word-bytes)))))
+                                      sb!vm:n-word-bytes)))))
       (#.sb!vm:control-stack-sc-number
        (sb!kernel:stack-ref fp (sb!c:sc-offset-offset sc-offset)))
       (#.sb!vm:base-char-stack-sc-number
        (with-nfp (nfp)
          (code-char (sb!sys:sap-ref-32 nfp (* (sb!c:sc-offset-offset sc-offset)
-                                              sb!vm:word-bytes)))))
+                                              sb!vm:n-word-bytes)))))
       (#.sb!vm:unsigned-stack-sc-number
        (with-nfp (nfp)
          (sb!sys:sap-ref-32 nfp (* (sb!c:sc-offset-offset sc-offset)
-                                   sb!vm:word-bytes))))
+                                   sb!vm:n-word-bytes))))
       (#.sb!vm:signed-stack-sc-number
        (with-nfp (nfp)
          (sb!sys:signed-sap-ref-32 nfp (* (sb!c:sc-offset-offset sc-offset)
-                                          sb!vm:word-bytes))))
+                                          sb!vm:n-word-bytes))))
       (#.sb!vm:sap-stack-sc-number
        (with-nfp (nfp)
          (sb!sys:sap-ref-sap nfp (* (sb!c:sc-offset-offset sc-offset)
-                                    sb!vm:word-bytes)))))))
+                                    sb!vm:n-word-bytes)))))))
 
 #!+x86
 (defun sub-access-debug-var-slot (fp sc-offset &optional escaped)
   (declare (type system-area-pointer fp))
-  (/show0 "entering SUB-ACCESS-DEBUG-VAR-SLOT, FP,SC-OFFSET,ESCAPED=..")
-  (/hexstr fp) (/hexstr sc-offset) (/hexstr escaped)
   (macrolet ((with-escaped-value ((var) &body forms)
               `(if escaped
                    (let ((,var (sb!vm:context-register
                                 escaped
                                 (sb!c:sc-offset-offset sc-offset))))
-                     (/show0 "in escaped case, ,VAR value=..")
-                     (/hexstr ,var)
                      ,@forms)
                    :invalid-value-for-unescaped-register-storage))
             (escaped-float-value (format)
                    :invalid-value-for-unescaped-register-storage)))
     (ecase (sb!c:sc-offset-scn sc-offset)
       ((#.sb!vm:any-reg-sc-number #.sb!vm:descriptor-reg-sc-number)
-       (/show0 "case of ANY-REG-SC-NUMBER or DESCRIPTOR-REG-SC-NUMBER")
        (without-gcing
        (with-escaped-value (val)
-         (/show0 "VAL=..")
-         (/hexstr val)
          (make-valid-lisp-obj val))))
       (#.sb!vm:base-char-reg-sc-number
-       (/show0 "case of BASE-CHAR-REG-SC-NUMBER")
        (with-escaped-value (val)
         (code-char val)))
       (#.sb!vm:sap-reg-sc-number
-       (/show0 "case of SAP-REG-SC-NUMBER")
        (with-escaped-value (val)
         (int-sap val)))
       (#.sb!vm:signed-reg-sc-number
-       (/show0 "case of SIGNED-REG-SC-NUMBER")
        (with-escaped-value (val)
-        (if (logbitp (1- sb!vm:word-bits) val)
-            (logior val (ash -1 sb!vm:word-bits))
+        (if (logbitp (1- sb!vm:n-word-bits) val)
+            (logior val (ash -1 sb!vm:n-word-bits))
             val)))
       (#.sb!vm:unsigned-reg-sc-number
-       (/show0 "case of UNSIGNED-REG-SC-NUMBER")
        (with-escaped-value (val)
         val))
       (#.sb!vm:single-reg-sc-number
-       (/show0 "case of SINGLE-REG-SC-NUMBER")
        (escaped-float-value single-float))
       (#.sb!vm:double-reg-sc-number
-       (/show0 "case of DOUBLE-REG-SC-NUMBER")
        (escaped-float-value double-float))
       #!+long-float
       (#.sb!vm:long-reg-sc-number
-       (/show0 "case of LONG-REG-SC-NUMBER")
        (escaped-float-value long-float))
       (#.sb!vm:complex-single-reg-sc-number
-       (/show0 "case of COMPLEX-SINGLE-REG-SC-NUMBER")
        (escaped-complex-float-value single-float))
       (#.sb!vm:complex-double-reg-sc-number
-       (/show0 "case of COMPLEX-DOUBLE-REG-SC-NUMBER")
        (escaped-complex-float-value double-float))
       #!+long-float
       (#.sb!vm:complex-long-reg-sc-number
-       (/show0 "case of COMPLEX-LONG-REG-SC-NUMBER")
        (escaped-complex-float-value long-float))
       (#.sb!vm:single-stack-sc-number
-       (/show0 "case of SINGLE-STACK-SC-NUMBER")
        (sap-ref-single fp (- (* (1+ (sb!c:sc-offset-offset sc-offset))
-                               sb!vm:word-bytes))))
+                               sb!vm:n-word-bytes))))
       (#.sb!vm:double-stack-sc-number
-       (/show0 "case of DOUBLE-STACK-SC-NUMBER")
        (sap-ref-double fp (- (* (+ (sb!c:sc-offset-offset sc-offset) 2)
-                               sb!vm:word-bytes))))
+                               sb!vm:n-word-bytes))))
       #!+long-float
       (#.sb!vm:long-stack-sc-number
-       (/show0 "case of LONG-STACK-SC-NUMBER")
        (sap-ref-long fp (- (* (+ (sb!c:sc-offset-offset sc-offset) 3)
-                             sb!vm:word-bytes))))
+                             sb!vm:n-word-bytes))))
       (#.sb!vm:complex-single-stack-sc-number
-       (/show0 "case of COMPLEX-STACK-SC-NUMBER")
        (complex
        (sap-ref-single fp (- (* (1+ (sb!c:sc-offset-offset sc-offset))
-                                sb!vm:word-bytes)))
+                                sb!vm:n-word-bytes)))
        (sap-ref-single fp (- (* (+ (sb!c:sc-offset-offset sc-offset) 2)
-                                sb!vm:word-bytes)))))
+                                sb!vm:n-word-bytes)))))
       (#.sb!vm:complex-double-stack-sc-number
-       (/show0 "case of COMPLEX-DOUBLE-STACK-SC-NUMBER")
        (complex
        (sap-ref-double fp (- (* (+ (sb!c:sc-offset-offset sc-offset) 2)
-                                sb!vm:word-bytes)))
+                                sb!vm:n-word-bytes)))
        (sap-ref-double fp (- (* (+ (sb!c:sc-offset-offset sc-offset) 4)
-                                sb!vm:word-bytes)))))
+                                sb!vm:n-word-bytes)))))
       #!+long-float
       (#.sb!vm:complex-long-stack-sc-number
-       (/show0 "case of COMPLEX-LONG-STACK-SC-NUMBER")
        (complex
        (sap-ref-long fp (- (* (+ (sb!c:sc-offset-offset sc-offset) 3)
-                              sb!vm:word-bytes)))
+                              sb!vm:n-word-bytes)))
        (sap-ref-long fp (- (* (+ (sb!c:sc-offset-offset sc-offset) 6)
-                              sb!vm:word-bytes)))))
+                              sb!vm:n-word-bytes)))))
       (#.sb!vm:control-stack-sc-number
-       (/show0 "case of CONTROL-STACK-SC-NUMBER")
        (stack-ref fp (sb!c:sc-offset-offset sc-offset)))
       (#.sb!vm:base-char-stack-sc-number
-       (/show0 "case of BASE-CHAR-STACK-SC-NUMBER")
        (code-char
        (sap-ref-32 fp (- (* (1+ (sb!c:sc-offset-offset sc-offset))
-                            sb!vm:word-bytes)))))
+                            sb!vm:n-word-bytes)))))
       (#.sb!vm:unsigned-stack-sc-number
-       (/show0 "case of UNSIGNED-STACK-SC-NUMBER")
        (sap-ref-32 fp (- (* (1+ (sb!c:sc-offset-offset sc-offset))
-                           sb!vm:word-bytes))))
+                           sb!vm:n-word-bytes))))
       (#.sb!vm:signed-stack-sc-number
-       (/show0 "case of SIGNED-STACK-SC-NUMBER")
        (signed-sap-ref-32 fp (- (* (1+ (sb!c:sc-offset-offset sc-offset))
-                                  sb!vm:word-bytes))))
+                                  sb!vm:n-word-bytes))))
       (#.sb!vm:sap-stack-sc-number
-       (/show0 "case of SAP-STACK-SC-NUMBER")
        (sap-ref-sap fp (- (* (1+ (sb!c:sc-offset-offset sc-offset))
-                            sb!vm:word-bytes)))))))
+                            sb!vm:n-word-bytes)))))))
 
 ;;; This stores value as the value of DEBUG-VAR in FRAME. In the
 ;;; COMPILED-DEBUG-VAR case, access the current value to determine if
                                                         sb!vm::nfp-offset))
                                #!-alpha
                                (sap-ref-sap fp
-                                            (* sb!vm::nfp-save-offset
-                                               sb!vm:word-bytes))
+                                            (* nfp-save-offset
+                                               sb!vm:n-word-bytes))
                                #!+alpha
                                (sb!vm::make-number-stack-pointer
                                 (sap-ref-32 fp
-                                            (* sb!vm::nfp-save-offset
-                                               sb!vm:word-bytes))))))
+                                            (* nfp-save-offset
+                                               sb!vm:n-word-bytes))))))
                  ,@body)))
     (ecase (sb!c:sc-offset-scn sc-offset)
       ((#.sb!vm:any-reg-sc-number
       (#.sb!vm:sap-reg-sc-number
        (set-escaped-value (sap-int value)))
       (#.sb!vm:signed-reg-sc-number
-       (set-escaped-value (logand value (1- (ash 1 sb!vm:word-bits)))))
+       (set-escaped-value (logand value (1- (ash 1 sb!vm:n-word-bits)))))
       (#.sb!vm:unsigned-reg-sc-number
        (set-escaped-value value))
       (#.sb!vm:non-descriptor-reg-sc-number
       (#.sb!vm:single-stack-sc-number
        (with-nfp (nfp)
         (setf (sap-ref-single nfp (* (sb!c:sc-offset-offset sc-offset)
-                                     sb!vm:word-bytes))
+                                     sb!vm:n-word-bytes))
               (the single-float value))))
       (#.sb!vm:double-stack-sc-number
        (with-nfp (nfp)
         (setf (sap-ref-double nfp (* (sb!c:sc-offset-offset sc-offset)
-                                     sb!vm:word-bytes))
+                                     sb!vm:n-word-bytes))
               (the double-float value))))
       #!+long-float
       (#.sb!vm:long-stack-sc-number
        (with-nfp (nfp)
         (setf (sap-ref-long nfp (* (sb!c:sc-offset-offset sc-offset)
-                                   sb!vm:word-bytes))
+                                   sb!vm:n-word-bytes))
               (the long-float value))))
       (#.sb!vm:complex-single-stack-sc-number
        (with-nfp (nfp)
         (setf (sap-ref-single
-               nfp (* (sb!c:sc-offset-offset sc-offset) sb!vm:word-bytes))
+               nfp (* (sb!c:sc-offset-offset sc-offset) sb!vm:n-word-bytes))
               (the single-float (realpart value)))
         (setf (sap-ref-single
                nfp (* (1+ (sb!c:sc-offset-offset sc-offset))
-                      sb!vm:word-bytes))
+                      sb!vm:n-word-bytes))
               (the single-float (realpart value)))))
       (#.sb!vm:complex-double-stack-sc-number
        (with-nfp (nfp)
         (setf (sap-ref-double
-               nfp (* (sb!c:sc-offset-offset sc-offset) sb!vm:word-bytes))
+               nfp (* (sb!c:sc-offset-offset sc-offset) sb!vm:n-word-bytes))
               (the double-float (realpart value)))
         (setf (sap-ref-double
                nfp (* (+ (sb!c:sc-offset-offset sc-offset) 2)
-                      sb!vm:word-bytes))
+                      sb!vm:n-word-bytes))
               (the double-float (realpart value)))))
       #!+long-float
       (#.sb!vm:complex-long-stack-sc-number
        (with-nfp (nfp)
         (setf (sap-ref-long
-               nfp (* (sb!c:sc-offset-offset sc-offset) sb!vm:word-bytes))
+               nfp (* (sb!c:sc-offset-offset sc-offset) sb!vm:n-word-bytes))
               (the long-float (realpart value)))
         (setf (sap-ref-long
                nfp (* (+ (sb!c:sc-offset-offset sc-offset) #!+sparc 4)
-                      sb!vm:word-bytes))
+                      sb!vm:n-word-bytes))
               (the long-float (realpart value)))))
       (#.sb!vm:control-stack-sc-number
        (setf (stack-ref fp (sb!c:sc-offset-offset sc-offset)) value))
       (#.sb!vm:base-char-stack-sc-number
        (with-nfp (nfp)
         (setf (sap-ref-32 nfp (* (sb!c:sc-offset-offset sc-offset)
-                                        sb!vm:word-bytes))
+                                        sb!vm:n-word-bytes))
               (char-code (the character value)))))
       (#.sb!vm:unsigned-stack-sc-number
        (with-nfp (nfp)
         (setf (sap-ref-32 nfp (* (sb!c:sc-offset-offset sc-offset)
-                                 sb!vm:word-bytes))
+                                 sb!vm:n-word-bytes))
               (the (unsigned-byte 32) value))))
       (#.sb!vm:signed-stack-sc-number
        (with-nfp (nfp)
         (setf (signed-sap-ref-32 nfp (* (sb!c:sc-offset-offset sc-offset)
-                                        sb!vm:word-bytes))
+                                        sb!vm:n-word-bytes))
               (the (signed-byte 32) value))))
       (#.sb!vm:sap-stack-sc-number
        (with-nfp (nfp)
         (setf (sap-ref-sap nfp (* (sb!c:sc-offset-offset sc-offset)
-                                  sb!vm:word-bytes))
+                                  sb!vm:n-word-bytes))
               (the system-area-pointer value)))))))
 
 #!+x86
       (#.sb!vm:sap-reg-sc-number
        (set-escaped-value (sap-int value)))
       (#.sb!vm:signed-reg-sc-number
-       (set-escaped-value (logand value (1- (ash 1 sb!vm:word-bits)))))
+       (set-escaped-value (logand value (1- (ash 1 sb!vm:n-word-bits)))))
       (#.sb!vm:unsigned-reg-sc-number
        (set-escaped-value value))
       (#.sb!vm:single-reg-sc-number
       (#.sb!vm:single-stack-sc-number
        (setf (sap-ref-single
              fp (- (* (1+ (sb!c:sc-offset-offset sc-offset))
-                      sb!vm:word-bytes)))
+                      sb!vm:n-word-bytes)))
             (the single-float value)))
       (#.sb!vm:double-stack-sc-number
        (setf (sap-ref-double
              fp (- (* (+ (sb!c:sc-offset-offset sc-offset) 2)
-                      sb!vm:word-bytes)))
+                      sb!vm:n-word-bytes)))
             (the double-float value)))
       #!+long-float
       (#.sb!vm:long-stack-sc-number
        (setf (sap-ref-long
              fp (- (* (+ (sb!c:sc-offset-offset sc-offset) 3)
-                      sb!vm:word-bytes)))
+                      sb!vm:n-word-bytes)))
             (the long-float value)))
       (#.sb!vm:complex-single-stack-sc-number
        (setf (sap-ref-single
              fp (- (* (1+ (sb!c:sc-offset-offset sc-offset))
-                      sb!vm:word-bytes)))
+                      sb!vm:n-word-bytes)))
             (realpart (the (complex single-float) value)))
        (setf (sap-ref-single
              fp (- (* (+ (sb!c:sc-offset-offset sc-offset) 2)
-                      sb!vm:word-bytes)))
+                      sb!vm:n-word-bytes)))
             (imagpart (the (complex single-float) value))))
       (#.sb!vm:complex-double-stack-sc-number
        (setf (sap-ref-double
              fp (- (* (+ (sb!c:sc-offset-offset sc-offset) 2)
-                      sb!vm:word-bytes)))
+                      sb!vm:n-word-bytes)))
             (realpart (the (complex double-float) value)))
        (setf (sap-ref-double
              fp (- (* (+ (sb!c:sc-offset-offset sc-offset) 4)
-                      sb!vm:word-bytes)))
+                      sb!vm:n-word-bytes)))
             (imagpart (the (complex double-float) value))))
       #!+long-float
       (#.sb!vm:complex-long-stack-sc-number
        (setf (sap-ref-long
              fp (- (* (+ (sb!c:sc-offset-offset sc-offset) 3)
-                      sb!vm:word-bytes)))
+                      sb!vm:n-word-bytes)))
             (realpart (the (complex long-float) value)))
        (setf (sap-ref-long
              fp (- (* (+ (sb!c:sc-offset-offset sc-offset) 6)
-                      sb!vm:word-bytes)))
+                      sb!vm:n-word-bytes)))
             (imagpart (the (complex long-float) value))))
       (#.sb!vm:control-stack-sc-number
        (setf (stack-ref fp (sb!c:sc-offset-offset sc-offset)) value))
       (#.sb!vm:base-char-stack-sc-number
        (setf (sap-ref-32 fp (- (* (1+ (sb!c:sc-offset-offset sc-offset))
-                                        sb!vm:word-bytes)))
+                                        sb!vm:n-word-bytes)))
             (char-code (the character value))))
       (#.sb!vm:unsigned-stack-sc-number
        (setf (sap-ref-32 fp (- (* (1+ (sb!c:sc-offset-offset sc-offset))
-                                        sb!vm:word-bytes)))
+                                        sb!vm:n-word-bytes)))
             (the (unsigned-byte 32) value)))
       (#.sb!vm:signed-stack-sc-number
        (setf (signed-sap-ref-32
-             fp (- (* (1+ (sb!c:sc-offset-offset sc-offset)) sb!vm:word-bytes)))
+             fp (- (* (1+ (sb!c:sc-offset-offset sc-offset))
+                      sb!vm:n-word-bytes)))
             (the (signed-byte 32) value)))
       (#.sb!vm:sap-stack-sc-number
        (setf (sap-ref-sap fp (- (* (1+ (sb!c:sc-offset-offset sc-offset))
-                                         sb!vm:word-bytes)))
+                                         sb!vm:n-word-bytes)))
             (the system-area-pointer value))))))
 
 ;;; The method for setting and accessing COMPILED-DEBUG-VAR values use
 ;;; this to determine if the value stored is the actual value or an
 ;;; indirection cell.
 (defun indirect-value-cell-p (x)
-  (and (= (get-lowtag x) sb!vm:other-pointer-lowtag)
-       (= (get-type x) sb!vm:value-cell-header-widetag)))
+  (and (= (lowtag-of x) sb!vm:other-pointer-lowtag)
+       (= (widetag-of x) sb!vm:value-cell-header-widetag)))
 
 ;;; Return three values reflecting the validity of DEBUG-VAR's value
 ;;; at BASIC-CODE-LOCATION:
 ;;; This code produces and uses what we call source-paths. A
 ;;; source-path is a list whose first element is a form number as
 ;;; returned by CODE-LOCATION-FORM-NUMBER and whose last element is a
-;;; top-level-form number as returned by
-;;; CODE-LOCATION-TOP-LEVEL-FORM-NUMBER. The elements from the last to
+;;; top level form number as returned by
+;;; CODE-LOCATION-TOPLEVEL-FORM-NUMBER. The elements from the last to
 ;;; the first, exclusively, are the numbered subforms into which to
 ;;; descend. For example:
 ;;;    (defun foo (x)
 ;;;      (let ((a (aref x 3)))
 ;;;    (cons a 3)))
 ;;; The call to AREF in this example is form number 5. Assuming this
-;;; DEFUN is the 11'th top-level-form, the source-path for the AREF
+;;; DEFUN is the 11'th top level form, the source-path for the AREF
 ;;; call is as follows:
 ;;;    (5 1 0 1 3 11)
 ;;; Given the DEFUN, 3 gets you the LET, 1 gets you the bindings, 0
 ;;; table used to detect CAR circularities in FORM-NUMBER-TRANSLATIONS
 (defvar *form-number-circularity-table* (make-hash-table :test 'eq))
 
-;;; This returns a table mapping form numbers to source-paths. A source-path
-;;; indicates a descent into the top-level-form form, going directly to the
-;;; subform corressponding to the form number.
+;;; This returns a table mapping form numbers to source-paths. A
+;;; source-path indicates a descent into the TOPLEVEL-FORM form,
+;;; going directly to the subform corressponding to the form number.
 ;;;
 ;;; The vector elements are in the same format as the compiler's
 ;;; NODE-SOURCE-PATH; that is, the first element is the form number and
-;;; the last is the top-level-form number.
+;;; the last is the TOPLEVEL-FORM number.
 (defun form-number-translations (form tlf-number)
   (clrhash *form-number-circularity-table*)
   (setf (fill-pointer *form-number-temp*) 0)
          (frob)
          (setq trail (cdr trail)))))))
 
-;;; FORM is a top-level form, and path is a source-path into it. This
+;;; FORM is a top level form, and path is a source-path into it. This
 ;;; returns the form indicated by the source-path. Context is the
 ;;; number of enclosing forms to return instead of directly returning
 ;;; the source-path form. When context is non-zero, the form returned
 ;;; The returned function takes the frame to get values from as its
 ;;; argument, and it returns the values of FORM. The returned function
 ;;; can signal the following conditions: INVALID-VALUE,
-;;; AMBIGUOUS-VARIABLE-NAME, and FRAME-FUN-MISMATCH.
+;;; AMBIGUOUS-VAR-NAME, and FRAME-FUN-MISMATCH.
 (defun preprocess-for-eval (form loc)
   (declare (type code-location loc))
   (let ((n-frame (gensym))
       (debug-signal 'no-debug-vars :debug-fun fun))
     (sb!int:collect ((binds)
                     (specs))
-      (do-debug-fun-variables (var fun)
+      (do-debug-fun-vars (var fun)
        (let ((validity (debug-var-validity var loc)))
          (unless (eq validity :invalid)
            (let* ((sym (debug-var-symbol var))
            (:valid
             (specs `(,name (debug-var-value ',var ,n-frame))))
            (:unknown
-            (specs `(,name (debug-signal 'invalid-value :debug-var ',var
+            (specs `(,name (debug-signal 'invalid-value
+                                         :debug-var ',var
                                          :frame ,n-frame))))
            (:ambiguous
-            (specs `(,name (debug-signal 'ambiguous-variable-name :name ',name
+            (specs `(,name (debug-signal 'ambiguous-var-name
+                                         :name ',name
                                          :frame ,n-frame)))))))
       (let ((res (coerce `(lambda (,n-frame)
                            (declare (ignorable ,n-frame))
                            (symbol-macrolet ,(specs) ,form))
                         'function)))
-       #'(lambda (frame)
-           ;; This prevents these functions from being used in any
-           ;; location other than a function return location, so
-           ;; maybe this should only check whether frame's
-           ;; DEBUG-FUN is the same as loc's.
-           (unless (code-location= (frame-code-location frame) loc)
-             (debug-signal 'frame-fun-mismatch
-                           :code-location loc :form form :frame frame))
-           (funcall res frame))))))
+       (lambda (frame)
+         ;; This prevents these functions from being used in any
+         ;; location other than a function return location, so maybe
+         ;; this should only check whether FRAME's DEBUG-FUN is the
+         ;; same as LOC's.
+         (unless (code-location= (frame-code-location frame) loc)
+           (debug-signal 'frame-fun-mismatch
+                         :code-location loc :form form :frame frame))
+         (funcall res frame))))))
 \f
 ;;;; breakpoints
 
 ;;;; user-visible interface
 
 ;;; Create and return a breakpoint. When program execution encounters
-;;; the breakpoint, the system calls HOOK-FUNCTION. HOOK-FUNCTION takes the
-;;; current frame for the function in which the program is running and the
-;;; breakpoint object.
+;;; the breakpoint, the system calls HOOK-FUN. HOOK-FUN takes the
+;;; current frame for the function in which the program is running and
+;;; the breakpoint object.
 ;;;
 ;;; WHAT and KIND determine where in a function the system invokes
-;;; HOOK-FUNCTION. WHAT is either a code-location or a DEBUG-FUN.
-;;; KIND is one of :CODE-LOCATION, :FUN-START, or :FUN-END.
-;;; Since the starts and ends of functions may not have code-locations
-;;; representing them, designate these places by supplying WHAT as a
-;;; DEBUG-FUN and KIND indicating the :FUN-START or
-;;; :FUN-END. When WHAT is a DEBUG-FUN and kind is
-;;; :FUN-END, then hook-function must take two additional
-;;; arguments, a list of values returned by the function and a
-;;; FUN-END-COOKIE.
+;;; HOOK-FUN. WHAT is either a code-location or a DEBUG-FUN. KIND is
+;;; one of :CODE-LOCATION, :FUN-START, or :FUN-END. Since the starts
+;;; and ends of functions may not have code-locations representing
+;;; them, designate these places by supplying WHAT as a DEBUG-FUN and
+;;; KIND indicating the :FUN-START or :FUN-END. When WHAT is a
+;;; DEBUG-FUN and kind is :FUN-END, then HOOK-FUN must take two
+;;; additional arguments, a list of values returned by the function
+;;; and a FUN-END-COOKIE.
 ;;;
 ;;; INFO is information supplied by and used by the user.
 ;;;
 ;;; function.
 ;;;
 ;;; Signal an error if WHAT is an unknown code-location.
-(defun make-breakpoint (hook-function what
+(defun make-breakpoint (hook-fun what
                        &key (kind :code-location) info fun-end-cookie)
   (etypecase what
     (code-location
        (error "cannot make a breakpoint at an unknown code location: ~S"
              what))
      (aver (eq kind :code-location))
-     (let ((bpt (%make-breakpoint hook-function what kind info)))
+     (let ((bpt (%make-breakpoint hook-fun what kind info)))
        (etypecase what
         (compiled-code-location
          ;; This slot is filled in due to calling CODE-LOCATION-UNKNOWN-P.
          (when (eq (compiled-code-location-kind what) :unknown-return)
-           (let ((other-bpt (%make-breakpoint hook-function what
+           (let ((other-bpt (%make-breakpoint hook-fun what
                                               :unknown-return-partner
                                               info)))
              (setf (breakpoint-unknown-return-partner bpt) other-bpt)
     (compiled-debug-fun
      (ecase kind
        (:fun-start
-       (%make-breakpoint hook-function what kind info))
+       (%make-breakpoint hook-fun what kind info))
        (:fun-end
        (unless (eq (sb!c::compiled-debug-fun-returns
                     (compiled-debug-fun-compiler-debug-fun what))
          (error ":FUN-END breakpoints are currently unsupported ~
                  for the known return convention."))
 
-       (let* ((bpt (%make-breakpoint hook-function what kind info))
+       (let* ((bpt (%make-breakpoint hook-fun what kind info))
               (starter (compiled-debug-fun-end-starter what)))
          (unless starter
            (setf starter (%make-breakpoint #'list what :fun-start nil))
-           (setf (breakpoint-hook-function starter)
+           (setf (breakpoint-hook-fun starter)
                  (fun-end-starter-hook starter what))
            (setf (compiled-debug-fun-end-starter what) starter))
          (setf (breakpoint-start-helper bpt) starter)
 (defun fun-end-starter-hook (starter-bpt debug-fun)
   (declare (type breakpoint starter-bpt)
           (type compiled-debug-fun debug-fun))
-  #'(lambda (frame breakpoint)
-      (declare (ignore breakpoint)
-              (type frame frame))
-      (let ((lra-sc-offset
-            (sb!c::compiled-debug-fun-return-pc
-             (compiled-debug-fun-compiler-debug-fun debug-fun))))
-       (multiple-value-bind (lra component offset)
-           (make-bogus-lra
-            (get-context-value frame
-                               sb!vm::lra-save-offset
-                               lra-sc-offset))
-         (setf (get-context-value frame
-                                  sb!vm::lra-save-offset
-                                  lra-sc-offset)
-               lra)
-         (let ((end-bpts (breakpoint-%info starter-bpt)))
-           (let ((data (breakpoint-data component offset)))
-             (setf (breakpoint-data-breakpoints data) end-bpts)
-             (dolist (bpt end-bpts)
-               (setf (breakpoint-internal-data bpt) data)))
-           (let ((cookie (make-fun-end-cookie lra debug-fun)))
-             (setf (gethash component *fun-end-cookies*) cookie)
-             (dolist (bpt end-bpts)
-               (let ((fun (breakpoint-cookie-fun bpt)))
-                 (when fun (funcall fun frame cookie))))))))))
+  (lambda (frame breakpoint)
+    (declare (ignore breakpoint)
+            (type frame frame))
+    (let ((lra-sc-offset
+          (sb!c::compiled-debug-fun-return-pc
+           (compiled-debug-fun-compiler-debug-fun debug-fun))))
+      (multiple-value-bind (lra component offset)
+         (make-bogus-lra
+          (get-context-value frame
+                             lra-save-offset
+                             lra-sc-offset))
+       (setf (get-context-value frame
+                                lra-save-offset
+                                lra-sc-offset)
+             lra)
+       (let ((end-bpts (breakpoint-%info starter-bpt)))
+         (let ((data (breakpoint-data component offset)))
+           (setf (breakpoint-data-breakpoints data) end-bpts)
+           (dolist (bpt end-bpts)
+             (setf (breakpoint-internal-data bpt) data)))
+         (let ((cookie (make-fun-end-cookie lra debug-fun)))
+           (setf (gethash component *fun-end-cookies*) cookie)
+           (dolist (bpt end-bpts)
+             (let ((fun (breakpoint-cookie-fun bpt)))
+               (when fun (funcall fun frame cookie))))))))))
 
 ;;; This takes a FUN-END-COOKIE and a frame, and it returns
 ;;; whether the cookie is still valid. A cookie becomes invalid when
     (do ((frame frame (frame-down frame)))
        ((not frame) nil)
       (when (and (compiled-frame-p frame)
-                (eq lra
-                    (get-context-value frame
-                                       sb!vm::lra-save-offset
-                                       lra-sc-offset)))
+                 (#-x86 eq #+x86 sap=
+                 lra
+                 (get-context-value frame lra-save-offset lra-sc-offset)))
        (return t)))))
 \f
 ;;;; ACTIVATE-BREAKPOINT
 
-;;; Cause the system to invoke the breakpoint's hook-function until
+;;; Cause the system to invoke the breakpoint's hook function until
 ;;; the next call to DEACTIVATE-BREAKPOINT or DELETE-BREAKPOINT. The
 ;;; system invokes breakpoint hook functions in the opposite order
 ;;; that you activate them.
 \f
 ;;;; DEACTIVATE-BREAKPOINT
 
-;;; Stop the system from invoking the breakpoint's hook-function.
+;;; Stop the system from invoking the breakpoint's hook function.
 (defun deactivate-breakpoint (breakpoint)
   (when (eq (breakpoint-status breakpoint) :active)
     (without-interrupts
 (defun deactivate-compiled-breakpoint (breakpoint)
   (if (eq (breakpoint-kind breakpoint) :fun-end)
       (let ((starter (breakpoint-start-helper breakpoint)))
-       (unless (find-if #'(lambda (bpt)
-                            (and (not (eq bpt breakpoint))
-                                 (eq (breakpoint-status bpt) :active)))
+       (unless (find-if (lambda (bpt)
+                          (and (not (eq bpt breakpoint))
+                               (eq (breakpoint-status bpt) :active)))
                         (breakpoint-%info starter))
          (deactivate-compiled-breakpoint starter)))
       (let* ((data (breakpoint-internal-data breakpoint))
 ;;; returns the overwritten bits. You must call this in a context in
 ;;; which GC is disabled, so that Lisp doesn't move objects around
 ;;; that C is pointing to.
-(sb!alien:def-alien-routine "breakpoint_install" sb!c-call:unsigned-long
-  (code-obj sb!c-call:unsigned-long)
-  (pc-offset sb!c-call:int))
+(sb!alien:define-alien-routine "breakpoint_install" sb!alien:unsigned-long
+  (code-obj sb!alien:unsigned-long)
+  (pc-offset sb!alien:int))
 
 ;;; This removes the break instruction and replaces the original
 ;;; instruction. You must call this in a context in which GC is disabled
 ;;; so Lisp doesn't move objects around that C is pointing to.
-(sb!alien:def-alien-routine "breakpoint_remove" sb!c-call:void
-  (code-obj sb!c-call:unsigned-long)
-  (pc-offset sb!c-call:int)
-  (old-inst sb!c-call:unsigned-long))
+(sb!alien:define-alien-routine "breakpoint_remove" sb!alien:void
+  (code-obj sb!alien:unsigned-long)
+  (pc-offset sb!alien:int)
+  (old-inst sb!alien:unsigned-long))
 
-(sb!alien:def-alien-routine "breakpoint_do_displaced_inst" sb!c-call:void
+(sb!alien:define-alien-routine "breakpoint_do_displaced_inst" sb!alien:void
   (scp (* os-context-t))
-  (orig-inst sb!c-call:unsigned-long))
+  (orig-inst sb!alien:unsigned-long))
 
 ;;;; breakpoint handlers (layer between C and exported interface)
 
-;;; This maps components to a mapping of offsets to breakpoint-datas.
+;;; This maps components to a mapping of offsets to BREAKPOINT-DATAs.
 (defvar *component-breakpoint-offsets* (make-hash-table :test 'eq))
 
-;;; This returns the breakpoint-data associated with component cross
+;;; This returns the BREAKPOINT-DATA object associated with component cross
 ;;; offset. If none exists, this makes one, installs it, and returns it.
 (defun breakpoint-data (component offset &optional (create t))
   (flet ((install-breakpoint-data ()
          (install-breakpoint-data)))))
 
 ;;; We use this when there are no longer any active breakpoints
-;;; corresponding to data.
+;;; corresponding to DATA.
 (defun delete-breakpoint-data (data)
   (let* ((component (breakpoint-data-component data))
         (offsets (delete (breakpoint-data-offset data)
   (values))
 
 ;;; The C handler for interrupts calls this when it has a
-;;; debugging-tool break instruction. This does NOT handle all breaks;
-;;; for example, it does not handle breaks for internal errors.
+;;; debugging-tool break instruction. This does *not* handle all
+;;; breaks; for example, it does not handle breaks for internal
+;;; errors.
 (defun handle-breakpoint (offset component signal-context)
-  (/show0 "entering HANDLE-BREAKPOINT")
   (let ((data (breakpoint-data component offset nil)))
     (unless data
       (error "unknown breakpoint in ~S at offset ~S"
 ;;; This handles code-location and DEBUG-FUN :FUN-START
 ;;; breakpoints.
 (defun handle-breakpoint-aux (breakpoints data offset component signal-context)
-  (/show0 "entering HANDLE-BREAKPOINT-AUX")
   (unless breakpoints
-    (error "internal error: breakpoint that nobody wants"))
+    (bug "breakpoint that nobody wants"))
   (unless (member data *executing-breakpoint-hooks*)
     (let ((*executing-breakpoint-hooks* (cons data
                                              *executing-breakpoint-hooks*)))
         (frame (do ((f (top-frame) (frame-down f)))
                    ((eq debug-fun (frame-debug-fun f)) f))))
     (dolist (bpt breakpoints)
-      (funcall (breakpoint-hook-function bpt)
+      (funcall (breakpoint-hook-fun bpt)
               frame
               ;; If this is an :UNKNOWN-RETURN-PARTNER, then pass the
               ;; hook function the original breakpoint, so that users
                   bpt)))))
 
 (defun handle-fun-end-breakpoint (offset component context)
-  (/show0 "entering HANDLE-FUN-END-BREAKPOINT")
   (let ((data (breakpoint-data component offset nil)))
     (unless data
       (error "unknown breakpoint in ~S at offset ~S"
 ;;; [old C code] or HANDLE-FUN-END-BREAKPOINT calls this directly
 ;;; [new C code].
 (defun handle-fun-end-breakpoint-aux (breakpoints data signal-context)
-  (/show0 "entering HANDLE-FUN-END-BREAKPOINT-AUX")
   (delete-breakpoint-data data)
   (let* ((scp
          (locally
         (frame (do ((cfp (sb!vm:context-register scp sb!vm::cfp-offset))
                     (f (top-frame) (frame-down f)))
                    ((= cfp (sap-int (frame-pointer f))) f)
-                 (declare (type (unsigned-byte #.sb!vm:word-bits) cfp))))
+                 (declare (type (unsigned-byte #.sb!vm:n-word-bits) cfp))))
         (component (breakpoint-data-component data))
         (cookie (gethash component *fun-end-cookies*)))
     (remhash component *fun-end-cookies*)
     (dolist (bpt breakpoints)
-      (funcall (breakpoint-hook-function bpt)
+      (funcall (breakpoint-hook-fun bpt)
               frame bpt
               (get-fun-end-breakpoint-values scp)
               cookie))))
        (setf (code-header-ref code-object (1+ real-lra-slot)) offset))
      (setf (code-header-ref code-object known-return-p-slot)
           known-return-p)
-     (system-area-copy src-start 0 dst-start 0 (* length sb!vm:byte-bits))
+     (system-area-copy src-start 0 dst-start 0 (* length sb!vm:n-byte-bits))
      (sb!vm:sanctify-for-execution code-object)
      #!+x86
      (values dst-start code-object (sap- trap-loc src-start))
     (do-debug-fun-blocks (block debug-fun)
       (do-debug-block-locations (loc block)
        (fill-in-code-location loc)
-       (format t "~S code location at ~D"
+       (format t "~S code location at ~W"
                (compiled-code-location-kind loc)
                (compiled-code-location-pc loc))
        (sb!debug::print-code-location-source-form loc 0)