1 ;;; introspection library
3 ;;;; This software is part of the SBCL system. See the README file for
6 ;;;; This software is derived from the CMU CL system, which was
7 ;;;; written at Carnegie Mellon University and released into the
8 ;;;; public domain. The software is in the public domain and is
9 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
10 ;;;; files for more information.
12 ;;; For the avoidance of doubt, the exported interface is the supported
13 ;;; interface. Anything else is internal, though you're welcome to argue a
14 ;;; case for exporting it.
16 ;;; If you steal the code from this file to cut and paste into your
17 ;;; own project, there will be much wailing and gnashing of teeth.
18 ;;; Your teeth. If need be, we'll kick them for you. This is a
19 ;;; contrib, we're allowed to look in internals. You're an
20 ;;; application programmer, and are not.
23 ;;; 1) structs don't have within-file location info. problem for the
24 ;;; structure itself, accessors, the copier and the predicate
25 ;;; 3) error handling. Signal random errors, or handle and resignal 'our'
26 ;;; error, or return NIL?
29 (defpackage :sb-introspect
31 (:export "ALLOCATION-INFORMATION"
33 "FUNCTION-LAMBDA-LIST"
36 "VALID-FUNCTION-NAME-P"
37 "FIND-DEFINITION-SOURCE"
38 "FIND-DEFINITION-SOURCES-BY-NAME"
40 "DEFINITION-SOURCE-PATHNAME"
41 "DEFINITION-SOURCE-FORM-PATH"
42 "DEFINITION-SOURCE-CHARACTER-OFFSET"
43 "DEFINITION-SOURCE-FILE-WRITE-DATE"
44 "DEFINITION-SOURCE-PLIST"
45 "DEFINITION-NOT-FOUND" "DEFINITION-NAME"
46 "FIND-FUNCTION-CALLEES"
47 "FIND-FUNCTION-CALLERS"
54 "WHO-SPECIALIZES-DIRECTLY"
55 "WHO-SPECIALIZES-GENERALLY"))
57 (in-package :sb-introspect)
59 ;;;; Internal interface for SBCL debug info
61 ;;; Here are some tutorial-style type definitions to help understand
62 ;;; the internal SBCL debugging data structures we're using. The
63 ;;; commentary is based on CMUCL's debug internals manual.
65 (deftype debug-info ()
66 "Structure containing all the debug information related to a function.
67 Function objects reference debug-infos which in turn reference
68 debug-sources and so on."
69 'sb-c::compiled-debug-info)
71 (deftype debug-source ()
72 "Debug sources describe where to find source code.
73 For example, the debug source for a function compiled from a file will
74 include the pathname of the file and the position of the definition."
77 (deftype debug-function ()
78 "Debug function represent static compile-time information about a function."
79 'sb-c::compiled-debug-fun)
81 (declaim (ftype (function (function) debug-info) function-debug-info))
82 (defun function-debug-info (function)
83 (let* ((function-object (sb-kernel::%fun-fun function))
84 (function-header (sb-kernel:fun-code-header function-object)))
85 (sb-kernel:%code-debug-info function-header)))
87 (declaim (ftype (function (function) debug-source) function-debug-source))
88 (defun function-debug-source (function)
89 (debug-info-source (function-debug-info function)))
91 (declaim (ftype (function (debug-info) debug-source) debug-info-source))
92 (defun debug-info-source (debug-info)
93 (sb-c::debug-info-source debug-info))
95 (declaim (ftype (function (debug-info) debug-function) debug-info-debug-function))
96 (defun debug-info-debug-function (debug-info)
97 (elt (sb-c::compiled-debug-info-fun-map debug-info) 0))
99 (defun valid-function-name-p (name)
100 "True if NAME denotes a valid function name, ie. one that can be passed to
102 (and (sb-int:valid-function-name-p name) t))
104 ;;;; Finding definitions
106 (defstruct definition-source
107 ;; Pathname of the source file that the definition was compiled from.
108 ;; This is null if the definition was not compiled from a file.
109 (pathname nil :type (or null pathname))
110 ;; Source-path of the definition within the file.
111 ;; This may be incomplete depending on the debug level at which the
112 ;; source was compiled.
113 (form-path '() :type list)
114 ;; Character offset of the top-level-form containing the definition.
115 ;; This corresponds to the first element of form-path.
116 (character-offset nil :type (or null integer))
117 ;; File-write-date of the source file when compiled.
118 ;; Null if not compiled from a file.
119 (file-write-date nil :type (or null integer))
120 ;; plist from WITH-COMPILATION-UNIT
122 ;; Any extra metadata that the caller might be interested in. For
123 ;; example the specializers of the method whose definition-source this
125 (description nil :type list))
127 (defun find-definition-sources-by-name (name type)
128 "Returns a list of DEFINITION-SOURCEs for the objects of type TYPE
129 defined with name NAME. NAME may be a symbol or a extended function
130 name. Type can currently be one of the following:
155 If an unsupported TYPE is requested, the function will return NIL.
163 (find-class name nil)))
164 (real-fdefinition (name)
165 ;; for getting the real function object, even if the
166 ;; function is being profiled
167 (let ((profile-info (gethash name sb-profile::*profiled-fun-name->info*)))
169 (sb-profile::profile-info-encapsulated-fun profile-info)
170 (fdefinition name)))))
174 (when (and (symbolp name)
175 (eq (sb-int:info :variable :kind name) :special))
176 (translate-source-location (sb-int:info :source-location type name))))
178 (when (and (symbolp name)
179 (eq (sb-int:info :variable :kind name) :constant))
180 (translate-source-location (sb-int:info :source-location type name))))
182 (when (and (symbolp name)
183 (eq (sb-int:info :variable :kind name) :macro))
184 (translate-source-location (sb-int:info :source-location type name))))
186 (when (and (symbolp name)
187 (macro-function name))
188 (find-definition-source (macro-function name))))
190 (when (compiler-macro-function name)
191 (find-definition-source (compiler-macro-function name))))
192 ((:function :generic-function)
193 (when (and (fboundp name)
194 (or (not (symbolp name))
195 (not (macro-function name))
196 (special-operator-p name)))
197 (let ((fun (real-fdefinition name)))
198 (when (eq (not (typep fun 'generic-function))
199 (not (eq type :generic-function)))
200 (find-definition-source fun)))))
202 ;; Source locations for types are saved separately when the expander
203 ;; is a closure without a good source-location.
204 (let ((loc (sb-int:info :type :source-location name)))
206 (translate-source-location loc)
207 (let ((expander-fun (sb-int:info :type :expander name)))
209 (find-definition-source expander-fun))))))
212 (let ((fun (real-fdefinition name)))
213 (when (typep fun 'generic-function)
214 (loop for method in (sb-mop::generic-function-methods
216 for source = (find-definition-source method)
217 when source collect source)))))
219 (when (and (consp name)
220 (eq (car name) 'setf))
221 (setf name (cadr name)))
222 (let ((expander (or (sb-int:info :setf :inverse name)
223 (sb-int:info :setf :expander name))))
225 (sb-introspect:find-definition-source (if (symbolp expander)
226 (symbol-function expander)
229 (let ((class (get-class name)))
231 (when (typep class 'sb-pcl::structure-class)
232 (find-definition-source class))
233 (when (sb-int:info :typed-structure :info name)
234 (translate-source-location
235 (sb-int:info :source-location :typed-structure name))))))
237 (let ((class (get-class name)))
239 (not (typep class 'sb-pcl::structure-class)))
240 (when (eq (not (typep class 'sb-pcl::condition-class))
241 (not (eq type :condition)))
242 (find-definition-source class)))))
243 ((:method-combination)
244 (let ((combination-fun
245 (find-method #'sb-mop:find-method-combination
247 (list (find-class 'generic-function)
251 (when combination-fun
252 (find-definition-source combination-fun))))
255 (let ((package (find-package name)))
257 (find-definition-source package)))))
258 ;; TRANSFORM and OPTIMIZER handling from swank-sbcl
261 (let ((fun-info (sb-int:info :function :info name)))
263 (loop for xform in (sb-c::fun-info-transforms fun-info)
264 for source = (find-definition-source
265 (sb-c::transform-function xform))
266 for typespec = (sb-kernel:type-specifier
267 (sb-c::transform-type xform))
268 for note = (sb-c::transform-note xform)
269 do (setf (definition-source-description source)
271 (list (second typespec) note)
276 (let ((fun-info (sb-int:info :function :info name)))
278 (let ((otypes '((sb-c::fun-info-derive-type . sb-c:derive-type)
279 (sb-c::fun-info-ltn-annotate . sb-c:ltn-annotate)
280 (sb-c::fun-info-ltn-annotate . sb-c:ltn-annotate)
281 (sb-c::fun-info-optimizer . sb-c:optimizer))))
282 (loop for (reader . name) in otypes
283 for fn = (funcall reader fun-info)
285 (let ((source (find-definition-source fn)))
286 (setf (definition-source-description source)
291 (let ((fun-info (sb-int:info :function :info name)))
293 (loop for vop in (sb-c::fun-info-templates fun-info)
294 for source = (find-definition-source
295 (sb-c::vop-info-generator-function vop))
296 do (setf (definition-source-description source)
297 (list (sb-c::template-name vop)
298 (sb-c::template-note vop)))
302 (let ((transform-fun (sb-int:info :function :source-transform name)))
304 (sb-introspect:find-definition-source transform-fun)))))
308 (defun find-definition-source (object)
310 ((or sb-pcl::condition-class sb-pcl::structure-class)
311 (let ((classoid (sb-impl::find-classoid (class-name object))))
313 (let ((layout (sb-impl::classoid-layout classoid)))
315 (translate-source-location
316 (sb-kernel::layout-source-location layout)))))))
319 (find-definition-sources-by-name
320 (sb-pcl::method-combination-type-name object) :method-combination)))
322 (translate-source-location (sb-impl::package-source-location object)))
324 (translate-source-location (sb-pcl::definition-source object)))
325 ;; Use the PCL definition location information instead of the function
326 ;; debug-info for methods and generic functions. Sometimes the
327 ;; debug-info would point into PCL internals instead of the proper
330 (let ((source (translate-source-location
331 (sb-pcl::definition-source object))))
333 (setf (definition-source-description source)
334 (list (sb-mop:generic-function-lambda-list object))))
337 (let ((source (translate-source-location
338 (sb-pcl::definition-source object))))
340 (setf (definition-source-description source)
341 (append (method-qualifiers object)
342 (if (sb-mop:method-generic-function object)
343 (sb-pcl::unparse-specializers
344 (sb-mop:method-generic-function object)
345 (sb-mop:method-specializers object))
346 (sb-mop:method-specializers object)))))
349 (sb-eval:interpreted-function
350 (let ((source (translate-source-location
351 (sb-eval:interpreted-function-source-location object))))
354 (cond ((struct-accessor-p object)
355 (find-definition-source
356 (struct-accessor-structure-class object)))
357 ((struct-predicate-p object)
358 (find-definition-source
359 (struct-predicate-structure-class object)))
360 ((struct-copier-p object)
361 (find-definition-source
362 (struct-copier-structure-class object)))
364 (find-function-definition-source object))))
365 ((or condition standard-object structure-object)
366 (find-definition-source (class-of object)))
368 (error "Don't know how to retrieve source location for a ~S"
371 (defun find-function-definition-source (function)
372 (let* ((debug-info (function-debug-info function))
373 (debug-source (debug-info-source debug-info))
374 (debug-fun (debug-info-debug-function debug-info))
375 (tlf (if debug-fun (sb-c::compiled-debug-fun-tlf-number debug-fun))))
376 (make-definition-source
378 ;; KLUDGE: at the moment, we don't record the correct toplevel
379 ;; form number for forms processed by EVAL (including EVAL-WHEN
380 ;; :COMPILE-TOPLEVEL). Until that's fixed, don't return a
381 ;; DEFINITION-SOURCE with a pathname. (When that's fixed, take
382 ;; out the (not (debug-source-form ...)) test.
383 (when (stringp (sb-c::debug-source-namestring debug-source))
384 (parse-namestring (sb-c::debug-source-namestring debug-source)))
387 (elt (sb-c::debug-source-start-positions debug-source) tlf))
388 ;; Unfortunately there is no proper source path available in the
389 ;; debug-source. FIXME: We could use sb-di:code-locations to get
390 ;; a full source path. -luke (12/Mar/2005)
391 :form-path (if tlf (list tlf))
392 :file-write-date (sb-c::debug-source-created debug-source)
393 :plist (sb-c::debug-source-plist debug-source))))
395 (defun translate-source-location (location)
397 (make-definition-source
398 :pathname (let ((n (sb-c:definition-source-location-namestring location)))
400 (parse-namestring n)))
402 (let ((number (sb-c:definition-source-location-toplevel-form-number
406 :plist (sb-c:definition-source-location-plist location))
407 (make-definition-source)))
409 ;;; This is kludgey. We expect these functions (the underlying functions,
410 ;;; not the closures) to be in static space and so not move ever.
411 ;;; FIXME It's also possibly wrong: not all structures use these vanilla
412 ;;; accessors, e.g. when the :type option is used
413 (defvar *struct-slotplace-reader*
414 (sb-vm::%simple-fun-self #'definition-source-pathname))
415 (defvar *struct-slotplace-writer*
416 (sb-vm::%simple-fun-self #'(setf definition-source-pathname)))
417 (defvar *struct-predicate*
418 (sb-vm::%simple-fun-self #'definition-source-p))
419 (defvar *struct-copier*
420 (sb-vm::%simple-fun-self #'copy-definition-source))
422 (defun struct-accessor-p (function)
423 (let ((self (sb-vm::%simple-fun-self function)))
424 ;; FIXME there are other kinds of struct accessor. Fill out this list
425 (member self (list *struct-slotplace-reader*
426 *struct-slotplace-writer*))))
428 (defun struct-copier-p (function)
429 (let ((self (sb-vm::%simple-fun-self function)))
430 ;; FIXME there may be other structure copier functions
431 (member self (list *struct-copier*))))
433 (defun struct-predicate-p (function)
434 (let ((self (sb-vm::%simple-fun-self function)))
435 ;; FIXME there may be other structure predicate functions
436 (member self (list *struct-predicate*))))
438 (sb-int:define-deprecated-function :late "1.0.24.5" function-arglist function-lambda-list
440 (function-lambda-list function))
442 (defun function-lambda-list (function)
443 "Describe the lambda list for the extended function designator FUNCTION.
444 Works for special-operators, macros, simple functions, interpreted functions,
445 and generic functions. Signals an error if FUNCTION is not a valid extended
446 function designator."
447 (cond ((valid-function-name-p function)
448 (function-lambda-list (or (and (symbolp function)
449 (macro-function function))
450 (fdefinition function))))
451 ((typep function 'generic-function)
452 (sb-pcl::generic-function-pretty-arglist function))
454 ((typep function 'sb-eval:interpreted-function)
455 (sb-eval:interpreted-function-lambda-list function))
457 (sb-kernel:%simple-fun-arglist (sb-kernel:%fun-fun function)))))
459 (defun deftype-lambda-list (typespec-operator)
460 "Returns the lambda list of TYPESPEC-OPERATOR as first return
461 value, and a flag whether the arglist could be found as second
463 (check-type typespec-operator symbol)
464 (case (sb-int:info :type :kind typespec-operator)
466 (sb-int:info :type :lambda-list typespec-operator))
468 (let ((translator-fun (sb-int:info :type :translator typespec-operator)))
470 (values (sb-kernel:%fun-lambda-list translator-fun) t)
471 ;; Some builtin types (e.g. STRING) do not have a
472 ;; translator, but they were actually defined via DEFTYPE
473 ;; in src/code/deftypes-for-target.lisp.
474 (sb-int:info :type :lambda-list typespec-operator))))
475 (t (values nil nil))))
477 (defun function-type (function-designator)
478 "Returns the ftype of FUNCTION-DESIGNATOR, or NIL."
479 (flet ((ftype-of (function-designator)
480 (sb-kernel:type-specifier
481 (sb-int:info :function :type function-designator))))
482 (etypecase function-designator
484 (when (and (fboundp function-designator)
485 (not (macro-function function-designator))
486 (not (special-operator-p function-designator)))
487 (ftype-of function-designator)))
489 (when (and (sb-int:legal-fun-name-p function-designator)
490 (fboundp function-designator))
491 (ftype-of function-designator)))
493 (function-type (sb-pcl:generic-function-name function-designator)))
495 ;; Give declared type in globaldb priority over derived type
496 ;; because it contains more accurate information e.g. for
498 (let ((type (function-type (sb-kernel:%fun-name
499 (sb-impl::%fun-fun function-designator)))))
502 (sb-impl::%fun-type function-designator)))))))
504 ;;; FIXME: These three are pretty terrible. Can we place have some proper metadata
507 (defun struct-accessor-structure-class (function)
508 (let ((self (sb-vm::%simple-fun-self function)))
510 ((member self (list *struct-slotplace-reader* *struct-slotplace-writer*))
512 (sb-kernel::classoid-name
513 (sb-kernel::layout-classoid
514 (sb-kernel:%closure-index-ref function 1)))))
517 (defun struct-copier-structure-class (function)
518 (let ((self (sb-vm::%simple-fun-self function)))
520 ((member self (list *struct-copier*))
522 (sb-kernel::classoid-name
523 (sb-kernel::layout-classoid
524 (sb-kernel:%closure-index-ref function 0)))))
527 (defun struct-predicate-structure-class (function)
528 (let ((self (sb-vm::%simple-fun-self function)))
530 ((member self (list *struct-predicate*))
532 (sb-kernel::classoid-name
533 (sb-kernel::layout-classoid
534 (sb-kernel:%closure-index-ref function 0)))))
537 ;;;; find callers/callees, liberated from Helmut Eller's code in SLIME
539 ;;; This interface is trmendously experimental.
541 ;;; For the moment I'm taking the view that FDEFN is an internal
542 ;;; object (one out of one CMUCL developer surveyed didn't know what
543 ;;; they were for), so these routines deal in FUNCTIONs
545 ;;; Find callers and callees by looking at the constant pool of
546 ;;; compiled code objects. We assume every fdefn object in the
547 ;;; constant pool corresponds to a call to that function. A better
548 ;;; strategy would be to use the disassembler to find actual
551 (defun find-function-callees (function)
552 "Return functions called by FUNCTION."
555 (sb-kernel:fun-code-header function)
557 (when (sb-kernel:fdefn-p obj)
558 (push (sb-kernel:fdefn-fun obj)
563 (defun find-function-callers (function &optional (spaces '(:read-only :static
565 "Return functions which call FUNCTION, by searching SPACES for code objects"
566 (let ((referrers '()))
567 (map-caller-code-components
571 (let ((entry (sb-kernel:%code-entry-points code)))
573 (push (princ-to-string code) referrers))
575 (loop for e = entry then (sb-kernel::%simple-fun-next e)
577 do (pushnew e referrers)))))))
580 (declaim (inline map-code-constants))
581 (defun map-code-constants (code fn)
582 "Call FN for each constant in CODE's constant pool."
583 (check-type code sb-kernel:code-component)
584 (loop for i from sb-vm:code-constants-offset below
585 (sb-kernel:get-header-data code)
586 do (funcall fn (sb-kernel:code-header-ref code i))))
588 (declaim (inline map-allocated-code-components))
589 (defun map-allocated-code-components (spaces fn)
590 "Call FN for each allocated code component in one of SPACES. FN
591 receives the object and its size as arguments. SPACES should be a
592 list of the symbols :dynamic, :static, or :read-only."
593 (dolist (space spaces)
594 (sb-vm::map-allocated-objects
595 (lambda (obj header size)
596 (when (= sb-vm:code-header-widetag header)
597 (funcall fn obj size)))
601 (declaim (inline map-caller-code-components))
602 (defun map-caller-code-components (function spaces fn)
603 "Call FN for each code component with a fdefn for FUNCTION in its
605 (let ((function (coerce function 'function)))
606 (map-allocated-code-components
609 (declare (ignore size))
613 (when (and (sb-kernel:fdefn-p constant)
614 (eq (sb-kernel:fdefn-fun constant)
616 (funcall fn obj))))))))
620 (defun get-simple-fun (functoid)
623 (get-simple-fun (sb-vm::fdefn-fun functoid)))
624 ((or null sb-impl::funcallable-instance)
627 (sb-kernel::%fun-fun functoid))))
629 (defun collect-xref (kind-index wanted-name)
631 (dolist (env sb-c::*info-environment* ret)
632 ;; Loop through the infodb ...
633 (sb-c::do-info (env :class class :type type :name info-name
635 ;; ... looking for function or macro definitions
636 (when (and (eql class :function)
637 (or (eql type :macro-function)
638 (eql type :definition)))
639 ;; Get a simple-fun for the definition, and an xref array
640 ;; from the table if available.
641 (let* ((simple-fun (get-simple-fun value))
642 (xrefs (when simple-fun
643 (sb-kernel:%simple-fun-xrefs simple-fun)))
645 (aref xrefs kind-index))))
646 ;; Loop through the name/path xref entries in the table
647 (loop for i from 0 below (length array) by 2
648 for xref-name = (aref array i)
649 for xref-path = (aref array (1+ i))
650 do (when (equal xref-name wanted-name)
651 (let ((source-location
652 (find-function-definition-source simple-fun)))
653 ;; Use the more accurate source path from
655 (setf (definition-source-form-path source-location)
657 (push (cons info-name source-location)
660 (defun who-calls (function-name)
661 "Use the xref facility to search for source locations where the
662 global function named FUNCTION-NAME is called. Returns a list of
663 function name, definition-source pairs."
664 (collect-xref #.(position :calls sb-c::*xref-kinds*) function-name))
666 (defun who-binds (symbol)
667 "Use the xref facility to search for source locations where the
668 special variable SYMBOL is rebound. Returns a list of function name,
669 definition-source pairs."
670 (collect-xref #.(position :binds sb-c::*xref-kinds*) symbol))
672 (defun who-references (symbol)
673 "Use the xref facility to search for source locations where the
674 special variable or constant SYMBOL is read. Returns a list of function
675 name, definition-source pairs."
676 (collect-xref #.(position :references sb-c::*xref-kinds*) symbol))
678 (defun who-sets (symbol)
679 "Use the xref facility to search for source locations where the
680 special variable SYMBOL is written to. Returns a list of function name,
681 definition-source pairs."
682 (collect-xref #.(position :sets sb-c::*xref-kinds*) symbol))
684 (defun who-macroexpands (macro-name)
685 "Use the xref facility to search for source locations where the
686 macro MACRO-NAME is expanded. Returns a list of function name,
687 definition-source pairs."
688 (collect-xref #.(position :macroexpands sb-c::*xref-kinds*) macro-name))
690 (defun who-specializes-directly (class-designator)
691 "Search for source locations of methods directly specializing on
692 CLASS-DESIGNATOR. Returns an alist of method name, definition-source
695 A method matches the criterion either if it specializes on the same
696 class as CLASS-DESIGNATOR designates (this includes CLASS-EQ
697 specializers), or if it eql-specializes on an instance of the
702 (let ((class (canonicalize-class-designator class-designator)))
704 (return-from who-specializes-directly nil))
705 (let ((result (collect-specializing-methods
707 ;; Does SPECL specialize on CLASS directly?
709 (sb-pcl::class-eq-specializer
710 (eq (sb-pcl::specializer-object specl) class))
711 (sb-pcl::eql-specializer
712 (let ((obj (sb-mop:eql-specializer-object specl)))
713 (eq (class-of obj) class)))
714 ((not sb-pcl::standard-specializer)
717 (eq specl class)))))))
718 (map-into result #'(lambda (m)
719 (cons `(method ,(method-generic-function-name m))
720 (find-definition-source m)))
723 (defun who-specializes-generally (class-designator)
724 "Search for source locations of methods specializing on
725 CLASS-DESIGNATOR, or a subclass of it. Returns an alist of method
726 name, definition-source pairs.
728 A method matches the criterion either if it specializes on the
729 designated class itself or a subclass of it (this includes CLASS-EQ
730 specializers), or if it eql-specializes on an instance of the
731 designated class or a subclass of it.
735 (let ((class (canonicalize-class-designator class-designator)))
737 (return-from who-specializes-generally nil))
738 (let ((result (collect-specializing-methods
740 ;; Does SPECL specialize on CLASS or a subclass
743 (sb-pcl::class-eq-specializer
744 (subtypep (sb-pcl::specializer-object specl) class))
745 (sb-pcl::eql-specializer
746 (typep (sb-mop:eql-specializer-object specl) class))
747 ((not sb-pcl::standard-specializer)
750 (subtypep specl class)))))))
751 (map-into result #'(lambda (m)
752 (cons `(method ,(method-generic-function-name m))
753 (find-definition-source m)))
756 (defun canonicalize-class-designator (class-designator)
757 (typecase class-designator
758 (symbol (find-class class-designator nil))
759 (class class-designator)
762 (defun method-generic-function-name (method)
763 (sb-mop:generic-function-name (sb-mop:method-generic-function method)))
765 (defun collect-specializing-methods (predicate)
767 (sb-pcl::map-specializers
769 (when (funcall predicate specl)
770 (let ((methods (sb-mop:specializer-direct-methods specl)))
771 (setf result (append methods result))))))
772 (delete-duplicates result)))
775 ;;;; ALLOCATION INTROSPECTION
777 (defun allocation-information (object)
779 "Returns information about the allocation of OBJECT. Primary return value
780 indicates the general type of allocation: :IMMEDIATE, :HEAP, :STACK,
783 Possible secondary return value provides additional information about the
786 For :HEAP objects the secondary value is a plist:
789 Inficates the heap segment the object is allocated in.
792 Is the current generation of the object: 0 for nursery, 6 for pseudo-static
793 generation loaded from core. (GENCGC and :SPACE :DYNAMIC only.)
796 Indicates a \"large\" object subject to non-copying
797 promotion. (GENCGC and :SPACE :DYNAMIC only.)
800 Indicates that the object is allocated in a boxed region. Unboxed
801 allocation is used for eg. specialized arrays after they have survived one
802 collection. (GENCGC and :SPACE :DYNAMIC only.)
805 Indicates that the page(s) on which the object resides are kept live due
806 to conservative references. Note that object may reside on a pinned page
807 even if :PINNED in NIL if the GC has not had the need to mark the the page
808 as pinned. (GENCGC and :SPACE :DYNAMIC only.)
811 Indicates that the page on which the object starts is write-protected,
812 which indicates for :BOXED objects that it hasn't been written to since
813 the last GC of its generation. (GENCGC and :SPACE :DYNAMIC only.)
816 The index of the page the object resides on. (GENGC and :SPACE :DYNAMIC
819 For :STACK objects secondary value is the thread on whose stack the object is
822 Expected use-cases include introspection to gain insight into allocation and
823 GC behaviour and restricting memoization to heap-allocated arguments.
825 Experimental: interface subject to change."
826 ;; FIXME: Would be nice to provide the size of the object as well, though
827 ;; maybe that should be a separate function, and something like MAP-PARTS
828 ;; for mapping over parts of arbitrary objects so users can get "deep sizes"
829 ;; as well if they want to.
831 ;; FIXME: For the memoization use-case possibly we should also provide a
832 ;; simpler HEAP-ALLOCATED-P, since that doesn't require disabling the GC
833 ;; scanning threads for negative answers? Similarly, STACK-ALLOCATED-P for
834 ;; checking if an object has been stack-allocated by a given thread for
835 ;; testing purposes might not come amiss.
836 (if (typep object '(or fixnum character))
837 (values :immediate nil)
839 (sb-sys:without-gcing
840 ;; Disable GC so the object cannot move to another page while
841 ;; we have the address.
842 (let* ((addr (sb-kernel:get-lisp-obj-address object))
844 (cond ((< sb-vm:read-only-space-start addr
845 (ash sb-vm:*read-only-space-free-pointer*
846 sb-vm:n-fixnum-tag-bits))
848 ((< sb-vm:static-space-start addr
849 (ash sb-vm:*static-space-free-pointer*
850 sb-vm:n-fixnum-tag-bits))
852 ((< (sb-kernel:current-dynamic-space-start) addr
853 (sb-sys:sap-int (sb-kernel:dynamic-space-free-pointer)))
857 (if (eq :dynamic space)
858 (let ((index (sb-vm::find-page-index addr)))
859 (symbol-macrolet ((page (sb-alien:deref sb-vm::page-table index)))
860 (let ((flags (sb-alien:slot page 'sb-vm::flags)))
862 :generation (sb-alien:slot page 'sb-vm::gen)
863 :write-protected (logbitp 0 flags)
864 :boxed (logbitp 2 flags)
865 :pinned (logbitp 5 flags)
866 :large (logbitp 6 flags)
870 (list :space space))))))
872 (values :heap plist))
874 (let ((sap (sb-sys:int-sap (sb-kernel:get-lisp-obj-address object))))
875 ;; FIXME: Check other stacks as well.
877 (dolist (thread (sb-thread:list-all-threads))
878 (let ((c-start (sb-di::descriptor-sap
879 (sb-thread::%symbol-value-in-thread
880 'sb-vm:*control-stack-start*
882 (c-end (sb-di::descriptor-sap
883 (sb-thread::%symbol-value-in-thread
884 'sb-vm:*control-stack-end*
886 (when (and c-start c-end)
887 (when (and (sb-sys:sap<= c-start sap)
888 (sb-sys:sap< sap c-end))
889 (return-from allocation-information
890 (values :stack thread))))))
892 (when (sb-vm:control-stack-pointer-valid-p sap nil)
893 (return-from allocation-information
894 (values :stack sb-thread::*current-thread*))))
897 (defun map-root (function object &key simple (ext t))
898 "Call FUNCTION with all non-immediate objects pointed to by OBJECT.
901 If SIMPLE is true (default is NIL), elides those pointers that are not
902 notionally part of certain built-in objects, but backpointers to a
903 conceptual parent: eg. elides the pointer from a SYMBOL to the
904 corresponding PACKAGE.
906 If EXT is true (default is T), includes some pointers that are not
907 actually contained in the object, but found in certain well-known
908 indirect containers: FDEFINITIONs, EQL specializers, classes, and
909 thread-local symbol values in other threads fall into this category.
911 NOTE: calling MAP-ROOT with a THREAD does not currently map over
912 conservative roots from the thread registers and interrupt contexts.
914 Experimental: interface subject to change."
915 (let ((fun (coerce function 'function))
916 (seen (sb-int:alloc-xset)))
918 (when (and (member (sb-kernel:lowtag-of part)
919 `(,sb-vm:instance-pointer-lowtag
920 ,sb-vm:list-pointer-lowtag
921 ,sb-vm:fun-pointer-lowtag
922 ,sb-vm:other-pointer-lowtag))
923 (not (sb-int:xset-member-p part seen)))
924 (sb-int:add-to-xset part seen)
925 (funcall fun part))))
927 (let ((table sb-pcl::*eql-specializer-table*))
928 (call (sb-int:with-locked-system-table (table)
929 (gethash object table)))))
931 ((or bignum float sb-sys:system-area-pointer fixnum))
933 (call (sb-ext:weak-pointer-value object)))
937 (when (and ext (ignore-errors (fboundp object)))
938 (call (fdefinition object))))
940 (call (numerator object))
941 (call (denominator object)))
943 (call (realpart object))
944 (call (realpart object)))
946 (let* ((len (sb-kernel:%instance-length object))
947 (nuntagged (if (typep object 'structure-object)
948 (sb-kernel:layout-n-untagged-slots
949 (sb-kernel:%instance-layout object))
951 (dotimes (i (- len nuntagged))
952 (call (sb-kernel:%instance-ref object i))))
954 (when (typep object 'sb-thread:thread)
955 (cond ((eq object sb-thread:*current-thread*)
956 (dolist (value (sb-thread::%thread-local-references))
958 (sb-vm::map-stack-references #'call))
960 ;; KLUDGE: INTERRUPT-THREAD is Not Nice (tm), but
961 ;; the alternative would be stopping the world...
963 (let ((sem (sb-thread:make-semaphore))
967 (sb-thread:interrupt-thread
970 (setf refs (sb-thread::%thread-local-references))
971 (sb-vm::map-stack-references (lambda (x) (push x refs)))
972 (sb-thread:signal-semaphore sem)))
973 (sb-thread:wait-on-semaphore sem))
974 (sb-thread:interrupt-thread-error ()))
975 (mapc #'call refs))))))
977 (if (simple-vector-p object)
978 (dotimes (i (length object))
979 (call (aref object i)))
980 (when (sb-kernel:array-header-p object)
981 (call (sb-kernel::%array-data-vector object))
982 (call (sb-kernel::%array-displaced-p object))
984 (call (sb-kernel::%array-displaced-from object))))))
985 (sb-kernel:code-component
986 (call (sb-kernel:%code-entry-points object))
987 (call (sb-kernel:%code-debug-info object))
988 (loop for i from sb-vm:code-constants-offset
989 below (sb-kernel:get-header-data object)
990 do (call (sb-kernel:code-header-ref object i))))
992 (call (sb-kernel:fdefn-name object))
993 (call (sb-kernel:fdefn-fun object)))
994 (sb-kernel:simple-fun
996 (call (sb-kernel:%simple-fun-next object)))
997 (call (sb-kernel:fun-code-header object))
998 (call (sb-kernel:%simple-fun-name object))
999 (call (sb-kernel:%simple-fun-arglist object))
1000 (call (sb-kernel:%simple-fun-type object))
1001 (call (sb-kernel:%simple-fun-info object)))
1003 (call (sb-kernel:%closure-fun object))
1004 (sb-kernel:do-closure-values (x object)
1006 (sb-kernel:funcallable-instance
1007 (call (sb-kernel:%funcallable-instance-function object))
1008 (loop for i from 1 below (- (1+ (sb-kernel:get-closure-length object))
1009 sb-vm::funcallable-instance-info-offset)
1010 do (call (sb-kernel:%funcallable-instance-info object i))))
1013 (dolist (thread (sb-thread:list-all-threads))
1014 (call (sb-thread:symbol-value-in-thread object thread nil))))
1016 ;; We don't have GLOBAL-BOUNDP, and there's no ERRORP arg.
1017 (call (sb-ext:symbol-global-value object))
1018 (unbound-variable ()))
1019 (when (and ext (ignore-errors (fboundp object)))
1020 (call (fdefinition object))
1021 (call (macro-function object))
1022 (let ((class (find-class object nil)))
1023 (when class (call class))))
1024 (call (symbol-plist object))
1025 (call (symbol-name object))
1027 (call (symbol-package object))))
1028 (sb-kernel::random-class
1029 (case (sb-kernel:widetag-of object)
1030 (#.sb-vm::value-cell-header-widetag
1031 (call (sb-kernel::value-cell-ref object)))
1033 (warn "~&MAP-ROOT: Unknown widetag ~S: ~S~%"
1034 (sb-kernel:widetag-of object) object)))))))