1 ;;; introspection library
3 ;;; This is here as a discussion point, not yet a supported interface. If
4 ;;; you would like to use the functions here, or you would like other
5 ;;; functions to be here, join the debate on navel@metacircles.com.
6 ;;; List info at http://lists.metacircles.com/cgi-bin/mailman/listinfo/navel
8 ;;; For the avoidance of doubt, the exported interface is the proposed
9 ;;; supported interface. Anything else is internal, though you're
10 ;;; welcome to argue a case for exporting it.
12 ;;; If you steal the code from this file to cut and paste into your
13 ;;; own project, there will be much wailing and gnashing of teeth.
14 ;;; Your teeth. If need be, we'll kick them for you. This is a
15 ;;; contrib, we're allowed to look in internals. You're an
16 ;;; application programmer, and are not.
19 ;;; 1) structs don't have within-file location info. problem for the
20 ;;; structure itself, accessors and the predicate
21 ;;; 3) error handling. Signal random errors, or handle and resignal 'our'
22 ;;; error, or return NIL?
25 (defpackage :sb-introspect
27 (:export
"FUNCTION-ARGLIST"
28 "VALID-FUNCTION-NAME-P"
29 "FIND-DEFINITION-SOURCE"
30 "FIND-DEFINITION-SOURCES-BY-NAME"
32 "DEFINITION-SOURCE-PATHNAME"
33 "DEFINITION-SOURCE-FORM-PATH"
34 "DEFINITION-SOURCE-CHARACTER-OFFSET"
35 "DEFINITION-SOURCE-FILE-WRITE-DATE"
36 "DEFINITION-SOURCE-PLIST"
37 "DEFINITION-NOT-FOUND" "DEFINITION-NAME"
38 "FIND-FUNCTION-CALLEES"
39 "FIND-FUNCTION-CALLERS"
46 (in-package :sb-introspect
)
48 ;;;; Internal interface for SBCL debug info
50 ;;; Here are some tutorial-style type definitions to help understand
51 ;;; the internal SBCL debugging data structures we're using. The
52 ;;; commentary is based on CMUCL's debug internals manual.
54 (deftype debug-info
()
55 "Structure containing all the debug information related to a function.
56 Function objects reference debug-infos which in turn reference
57 debug-sources and so on."
58 'sb-c
::compiled-debug-info
)
60 (deftype debug-source
()
61 "Debug sources describe where to find source code.
62 For example, the debug source for a function compiled from a file will
63 include the pathname of the file and the position of the definition."
66 (deftype debug-function
()
67 "Debug function represent static compile-time information about a function."
68 'sb-c
::compiled-debug-fun
)
70 (declaim (ftype (function (function) debug-info
) function-debug-info
))
71 (defun function-debug-info (function)
72 (let* ((function-object (sb-kernel::%closure-fun function
))
73 (function-header (sb-kernel:fun-code-header function-object
)))
74 (sb-kernel:%code-debug-info function-header
)))
76 (declaim (ftype (function (function) debug-source
) function-debug-source
))
77 (defun function-debug-source (function)
78 (debug-info-source (function-debug-info function
)))
80 (declaim (ftype (function (debug-info) debug-source
) debug-info-source
))
81 (defun debug-info-source (debug-info)
82 (sb-c::debug-info-source debug-info
))
84 (declaim (ftype (function (debug-info) debug-function
) debug-info-debug-function
))
85 (defun debug-info-debug-function (debug-info)
86 (elt (sb-c::compiled-debug-info-fun-map debug-info
) 0))
88 (defun valid-function-name-p (name)
89 "True if NAME denotes a function name that can be passed to MACRO-FUNCTION or FDEFINITION "
90 (and (sb-int:valid-function-name-p name
) t
))
92 ;;;; Finding definitions
94 (defstruct definition-source
95 ;; Pathname of the source file that the definition was compiled from.
96 ;; This is null if the definition was not compiled from a file.
97 (pathname nil
:type
(or null pathname
))
98 ;; Source-path of the definition within the file.
99 ;; This may be incomplete depending on the debug level at which the
100 ;; source was compiled.
101 (form-path '() :type list
)
102 ;; Character offset of the top-level-form containing the definition.
103 ;; This corresponds to the first element of form-path.
104 (character-offset nil
:type
(or null integer
))
105 ;; File-write-date of the source file when compiled.
106 ;; Null if not compiled from a file.
107 (file-write-date nil
:type
(or null integer
))
108 ;; plist from WITH-COMPILATION-UNIT
110 ;; Any extra metadata that the caller might be interested in. For
111 ;; example the specializers of the method whose definition-source this
113 (description nil
:type list
))
115 (defun find-definition-sources-by-name (name type
)
116 "Returns a list of DEFINITION-SOURCEs for the objects of type TYPE
117 defined with name NAME. NAME may be a symbol or a extended function
118 name. Type can currently be one of the following:
143 If an unsupported TYPE is requested, the function will return NIL.
151 (find-class name nil
)))
152 (real-fdefinition (name)
153 ;; for getting the real function object, even if the
154 ;; function is being profiled
155 (let ((profile-info (gethash name sb-profile
::*profiled-fun-name-
>info
*)))
157 (sb-profile::profile-info-encapsulated-fun profile-info
)
158 (fdefinition name
)))))
162 (when (and (symbolp name
)
163 (eq (sb-int:info
:variable
:kind name
) :special
))
164 (translate-source-location (sb-int:info
:source-location type name
))))
166 (when (and (symbolp name
)
167 (eq (sb-int:info
:variable
:kind name
) :constant
))
168 (translate-source-location (sb-int:info
:source-location type name
))))
170 (when (and (symbolp name
)
171 (eq (sb-int:info
:variable
:kind name
) :macro
))
172 (translate-source-location (sb-int:info
:source-location type name
))))
174 (when (and (symbolp name
)
175 (macro-function name
))
176 (find-definition-source (macro-function name
))))
178 (when (compiler-macro-function name
)
179 (find-definition-source (compiler-macro-function name
))))
180 ((:function
:generic-function
)
181 (when (and (fboundp name
)
182 (or (not (symbolp name
))
183 (not (macro-function name
))))
184 (let ((fun (real-fdefinition name
)))
185 (when (eq (not (typep fun
'generic-function
))
186 (not (eq type
:generic-function
)))
187 (find-definition-source fun
)))))
189 (let ((expander-fun (sb-int:info
:type
:expander name
)))
191 (find-definition-source expander-fun
))))
194 (let ((fun (real-fdefinition name
)))
195 (when (typep fun
'generic-function
)
196 (loop for method in
(sb-mop::generic-function-methods
198 for source
= (find-definition-source method
)
199 when source collect source
)))))
201 (when (and (consp name
)
202 (eq (car name
) 'setf
))
203 (setf name
(cadr name
)))
204 (let ((expander (or (sb-int:info
:setf
:inverse name
)
205 (sb-int:info
:setf
:expander name
))))
207 (sb-introspect:find-definition-source
(if (symbolp expander
)
208 (symbol-function expander
)
211 (let ((class (get-class name
)))
213 (when (typep class
'sb-pcl
::structure-class
)
214 (find-definition-source class
))
215 (when (sb-int:info
:typed-structure
:info name
)
216 (translate-source-location
217 (sb-int:info
:source-location
:typed-structure name
))))))
219 (let ((class (get-class name
)))
221 (not (typep class
'sb-pcl
::structure-class
)))
222 (when (eq (not (typep class
'sb-pcl
::condition-class
))
223 (not (eq type
:condition
)))
224 (find-definition-source class
)))))
225 ((:method-combination
)
226 (let ((combination-fun
227 (ignore-errors (find-method #'sb-mop
:find-method-combination
229 (list (find-class 'generic-function
)
232 (when combination-fun
233 (find-definition-source combination-fun
))))
236 (let ((package (find-package name
)))
238 (find-definition-source package
)))))
239 ;; TRANSFORM and OPTIMIZER handling from swank-sbcl
242 (let ((fun-info (sb-int:info
:function
:info name
)))
244 (loop for xform in
(sb-c::fun-info-transforms fun-info
)
245 for source
= (find-definition-source
246 (sb-c::transform-function xform
))
247 for typespec
= (sb-kernel:type-specifier
248 (sb-c::transform-type xform
))
249 for note
= (sb-c::transform-note xform
)
250 do
(setf (definition-source-description source
)
252 (list (second typespec
) note
)
257 (let ((fun-info (sb-int:info
:function
:info name
)))
259 (let ((otypes '((sb-c::fun-info-derive-type . sb-c
:derive-type
)
260 (sb-c::fun-info-ltn-annotate . sb-c
:ltn-annotate
)
261 (sb-c::fun-info-ltn-annotate . sb-c
:ltn-annotate
)
262 (sb-c::fun-info-optimizer . sb-c
:optimizer
))))
263 (loop for
(reader . name
) in otypes
264 for fn
= (funcall reader fun-info
)
266 (let ((source (find-definition-source fn
)))
267 (setf (definition-source-description source
)
272 (let ((fun-info (sb-int:info
:function
:info name
)))
274 (loop for vop in
(sb-c::fun-info-templates fun-info
)
275 for source
= (find-definition-source
276 (sb-c::vop-info-generator-function vop
))
277 do
(setf (definition-source-description source
)
278 (list (sb-c::template-name vop
)
279 (sb-c::template-note vop
)))
283 (let ((transform-fun (sb-int:info
:function
:source-transform name
)))
285 (sb-introspect:find-definition-source transform-fun
)))))
289 (defun find-definition-source (object)
291 ((or sb-pcl
::condition-class sb-pcl
::structure-class
)
292 (let ((classoid (sb-impl::find-classoid
(class-name object
))))
294 (let ((layout (sb-impl::classoid-layout classoid
)))
296 (translate-source-location
297 (sb-kernel::layout-source-location layout
)))))))
300 (find-definition-sources-by-name
301 (sb-pcl::method-combination-type-name object
) :method-combination
)))
303 (translate-source-location (sb-impl::package-source-location object
)))
305 (translate-source-location (sb-pcl::definition-source object
)))
306 ;; Use the PCL definition location information instead of the function
307 ;; debug-info for methods and generic functions. Sometimes the
308 ;; debug-info would point into PCL internals instead of the proper
311 (let ((source (translate-source-location
312 (sb-pcl::definition-source object
))))
314 (setf (definition-source-description source
)
315 (list (sb-mop:generic-function-lambda-list object
))))
318 (let ((source (translate-source-location
319 (sb-pcl::definition-source object
))))
321 (setf (definition-source-description source
)
322 (append (method-qualifiers object
)
323 (if (sb-mop:method-generic-function object
)
324 (sb-pcl::unparse-specializers
325 (sb-mop:method-generic-function object
)
326 (sb-mop:method-specializers object
))
327 (sb-mop:method-specializers object
)))))
330 (sb-eval:interpreted-function
331 (let ((source (translate-source-location
332 (sb-eval:interpreted-function-source-location object
))))
335 (cond ((struct-accessor-p object
)
336 (find-definition-source
337 (struct-accessor-structure-class object
)))
338 ((struct-predicate-p object
)
339 (find-definition-source
340 (struct-predicate-structure-class object
)))
342 (find-function-definition-source object
))))
344 (error "Don't know how to retrive source location for a ~S~%"
347 (defun find-function-definition-source (function)
348 (let* ((debug-info (function-debug-info function
))
349 (debug-source (debug-info-source debug-info
))
350 (debug-fun (debug-info-debug-function debug-info
))
351 (tlf (if debug-fun
(sb-c::compiled-debug-fun-tlf-number debug-fun
))))
352 (make-definition-source
354 (if (eql (sb-c::debug-source-from debug-source
) :file
)
355 (parse-namestring (sb-c::debug-source-name debug-source
)))
358 (elt (sb-c::debug-source-start-positions debug-source
) tlf
))
359 ;; Unfortunately there is no proper source path available in the
360 ;; debug-source. FIXME: We could use sb-di:code-locations to get
361 ;; a full source path. -luke (12/Mar/2005)
362 :form-path
(if tlf
(list tlf
))
363 :file-write-date
(sb-c::debug-source-created debug-source
)
364 :plist
(sb-c::debug-source-plist debug-source
))))
366 (defun translate-source-location (location)
368 (make-definition-source
369 :pathname
(let ((n (sb-c:definition-source-location-namestring location
)))
371 (parse-namestring n
)))
373 (let ((number (sb-c:definition-source-location-toplevel-form-number
377 :plist
(sb-c:definition-source-location-plist location
))
378 (make-definition-source)))
380 ;;; This is kludgey. We expect these functions (the underlying functions,
381 ;;; not the closures) to be in static space and so not move ever.
382 ;;; FIXME It's also possibly wrong: not all structures use these vanilla
383 ;;; accessors, e.g. when the :type option is used
384 (defvar *struct-slotplace-reader
*
385 (sb-vm::%simple-fun-self
#'definition-source-pathname
))
386 (defvar *struct-slotplace-writer
*
387 (sb-vm::%simple-fun-self
#'(setf definition-source-pathname
)))
388 (defvar *struct-predicate
*
389 (sb-vm::%simple-fun-self
#'definition-source-p
))
391 (defun struct-accessor-p (function)
392 (let ((self (sb-vm::%simple-fun-self function
)))
393 ;; FIXME there are other kinds of struct accessor. Fill out this list
394 (member self
(list *struct-slotplace-reader
*
395 *struct-slotplace-writer
*))))
397 (defun struct-predicate-p (function)
398 (let ((self (sb-vm::%simple-fun-self function
)))
399 ;; FIXME there may be other structure predicate functions
400 (member self
(list *struct-predicate
*))))
402 ;;; FIXME: maybe this should be renamed as FUNCTION-LAMBDA-LIST?
403 (defun function-arglist (function)
404 "Describe the lambda list for the extended function designator FUNCTION.
405 Works for special-operators, macros, simple functions,
406 interpreted functions, and generic functions. Signals error if
408 (cond ((valid-function-name-p function
)
409 (function-arglist (or (and (symbolp function
)
410 (macro-function function
))
411 (fdefinition function
))))
412 ((typep function
'generic-function
)
413 (sb-pcl::generic-function-pretty-arglist function
))
415 ((typep function
'sb-eval
:interpreted-function
)
416 (sb-eval:interpreted-function-lambda-list function
))
417 (t (sb-kernel:%simple-fun-arglist
(sb-kernel:%fun-fun function
)))))
419 (defun struct-accessor-structure-class (function)
420 (let ((self (sb-vm::%simple-fun-self function
)))
422 ((member self
(list *struct-slotplace-reader
* *struct-slotplace-writer
*))
424 (sb-kernel::classoid-name
425 (sb-kernel::layout-classoid
426 (sb-kernel:%closure-index-ref function
1)))))
429 (defun struct-predicate-structure-class (function)
430 (let ((self (sb-vm::%simple-fun-self function
)))
432 ((member self
(list *struct-predicate
*))
434 (sb-kernel::classoid-name
435 (sb-kernel::layout-classoid
436 (sb-kernel:%closure-index-ref function
0)))))
439 ;;;; find callers/callees, liberated from Helmut Eller's code in SLIME
441 ;;; This interface is trmendously experimental.
443 ;;; For the moment I'm taking the view that FDEFN is an internal
444 ;;; object (one out of one CMUCL developer surveyed didn't know what
445 ;;; they were for), so these routines deal in FUNCTIONs
447 ;;; Find callers and callees by looking at the constant pool of
448 ;;; compiled code objects. We assume every fdefn object in the
449 ;;; constant pool corresponds to a call to that function. A better
450 ;;; strategy would be to use the disassembler to find actual
453 (defun find-function-callees (function)
454 "Return functions called by FUNCTION."
457 (sb-kernel:fun-code-header function
)
459 (when (sb-kernel:fdefn-p obj
)
460 (push (sb-kernel:fdefn-fun obj
)
465 (defun find-function-callers (function &optional
(spaces '(:read-only
:static
467 "Return functions which call FUNCTION, by searching SPACES for code objects"
468 (let ((referrers '()))
469 (map-caller-code-components
473 (let ((entry (sb-kernel:%code-entry-points code
)))
475 (push (princ-to-string code
) referrers
))
477 (loop for e
= entry then
(sb-kernel::%simple-fun-next e
)
479 do
(pushnew e referrers
)))))))
482 (declaim (inline map-code-constants
))
483 (defun map-code-constants (code fn
)
484 "Call FN for each constant in CODE's constant pool."
485 (check-type code sb-kernel
:code-component
)
486 (loop for i from sb-vm
:code-constants-offset below
487 (sb-kernel:get-header-data code
)
488 do
(funcall fn
(sb-kernel:code-header-ref code i
))))
490 (declaim (inline map-allocated-code-components
))
491 (defun map-allocated-code-components (spaces fn
)
492 "Call FN for each allocated code component in one of SPACES. FN
493 receives the object and its size as arguments. SPACES should be a
494 list of the symbols :dynamic, :static, or :read-only."
495 (dolist (space spaces
)
496 (sb-vm::map-allocated-objects
497 (lambda (obj header size
)
498 (when (= sb-vm
:code-header-widetag header
)
499 (funcall fn obj size
)))
503 (declaim (inline map-caller-code-components
))
504 (defun map-caller-code-components (function spaces fn
)
505 "Call FN for each code component with a fdefn for FUNCTION in its
507 (let ((function (coerce function
'function
)))
508 (map-allocated-code-components
511 (declare (ignore size
))
515 (when (and (sb-kernel:fdefn-p constant
)
516 (eq (sb-kernel:fdefn-fun constant
)
518 (funcall fn obj
))))))))
522 (defun get-simple-fun (functoid)
525 (get-simple-fun (sb-vm::fdefn-fun functoid
)))
526 ((or null sb-impl
::funcallable-instance
)
529 (sb-kernel::%closure-fun functoid
))))
531 (defun collect-xref (kind-index wanted-name
)
533 (dolist (env sb-c
::*info-environment
* ret
)
534 ;; Loop through the infodb ...
535 (sb-c::do-info
(env :class class
:type type
:name info-name
537 ;; ... looking for function or macro definitions
538 (when (and (eql class
:function
)
539 (or (eql type
:macro-function
)
540 (eql type
:definition
)))
541 ;; Get a simple-fun for the definition, and an xref array
542 ;; from the table if available.
543 (let* ((simple-fun (get-simple-fun value
))
544 (xrefs (when simple-fun
545 (sb-vm::%simple-fun-xrefs simple-fun
)))
547 (aref xrefs kind-index
))))
548 ;; Loop through the name/path xref entries in the table
549 (loop for i from
0 below
(length array
) by
2
550 for xref-name
= (aref array i
)
551 for xref-path
= (aref array
(1+ i
))
552 do
(when (eql xref-name wanted-name
)
553 (let ((source-location
554 (find-function-definition-source simple-fun
)))
555 ;; Use the more accurate source path from
557 (setf (definition-source-form-path source-location
)
559 (push (cons info-name source-location
)
562 (defun who-calls (function-name)
563 "Use the xref facility to search for source locations where the
564 global function named FUNCTION-NAME is called. Returns a list of
565 function name, definition-source pairs."
566 (collect-xref #.
(position :calls sb-c
::*xref-kinds
*) function-name
))
568 (defun who-binds (symbol)
569 "Use the xref facility to search for source locations where the
570 special variable SYMBOL is rebound. Returns a list of function name,
571 definition-source pairs."
572 (collect-xref #.
(position :binds sb-c
::*xref-kinds
*) symbol
))
574 (defun who-references (symbol)
575 "Use the xref facility to search for source locations where the
576 special variable or constant SYMBOL is read. Returns a list of function
577 name, definition-source pairs."
578 (collect-xref #.
(position :references sb-c
::*xref-kinds
*) symbol
))
580 (defun who-sets (symbol)
581 "Use the xref facility to search for source locations where the
582 special variable SYMBOL is written to. Returns a list of function name,
583 definition-source pairs."
584 (collect-xref #.
(position :sets sb-c
::*xref-kinds
*) symbol
))
586 (defun who-macroexpands (macro-name)
587 "Use the xref facility to search for source locations where the
588 macro MACRO-NAME is expanded. Returns a list of function name,
589 definition-source pairs."
590 (collect-xref #.
(position :macroexpands sb-c
::*xref-kinds
*) macro-name
))
592 (provide 'sb-introspect
)