"DEFINITION-NOT-FOUND" "DEFINITION-NAME"
"FIND-FUNCTION-CALLEES"
"FIND-FUNCTION-CALLERS"
+ "MAP-ROOT"
"WHO-BINDS"
"WHO-CALLS"
"WHO-REFERENCES"
(values :stack sb-thread::*current-thread*))))
:foreign)))))
+(defun map-root (function object &key simple (ext t))
+ "Call FUNCTION with all non-immediate objects pointed to by OBJECT.
+Returns OBJECT.
+
+If SIMPLE is true (default is NIL), elides those pointers that are not
+notionally part of certain built-in objects, but backpointers to a
+conceptual parent: eg. elides the pointer from a SYMBOL to the
+corresponding PACKAGE.
+
+If EXT is true (default is T), includes some pointers that are not
+actually contained in the object, but found in certain well-known
+indirect containers: FDEFINITIONs, EQL specializers, classes, and
+thread-local symbol values in other threads fall into this category.
+
+NOTE: calling MAP-ROOT with a THREAD does not currently map over
+conservative roots from the thread registers and interrupt contexts.
+
+Experimental: interface subject to change."
+ (let ((fun (coerce function 'function))
+ (seen (sb-int:alloc-xset)))
+ (flet ((call (part)
+ (when (and (member (sb-kernel:lowtag-of part)
+ `(,sb-vm:instance-pointer-lowtag
+ ,sb-vm:list-pointer-lowtag
+ ,sb-vm:fun-pointer-lowtag
+ ,sb-vm:other-pointer-lowtag))
+ (not (sb-int:xset-member-p part seen)))
+ (sb-int:add-to-xset part seen)
+ (funcall fun part))))
+ (when ext
+ (let ((table sb-pcl::*eql-specializer-table*))
+ (call (sb-ext:with-locked-hash-table (table)
+ (gethash object table)))))
+ (etypecase object
+ ((or bignum float sb-sys:system-area-pointer fixnum))
+ (sb-ext:weak-pointer
+ (call (sb-ext:weak-pointer-value object)))
+ (cons
+ (call (car object))
+ (call (cdr object))
+ (when (and ext (ignore-errors (fboundp object)))
+ (call (fdefinition object))))
+ (ratio
+ (call (numerator object))
+ (call (denominator object)))
+ (complex
+ (call (realpart object))
+ (call (realpart object)))
+ (sb-vm::instance
+ (let* ((len (sb-kernel:%instance-length object))
+ (nuntagged (if (typep object 'structure-object)
+ (sb-kernel:layout-n-untagged-slots
+ (sb-kernel:%instance-layout object))
+ 0)))
+ (dotimes (i (- len nuntagged))
+ (call (sb-kernel:%instance-ref object i))))
+ #+sb-thread
+ (when (typep object 'sb-thread:thread)
+ (cond ((eq object sb-thread:*current-thread*)
+ (dolist (value (sb-thread::%thread-local-references))
+ (call value))
+ (sb-vm::map-stack-references #'call))
+ (t
+ ;; KLUDGE: INTERRUPT-THREAD is Not Nice (tm), but
+ ;; the alternative would be stopping the world...
+ #+sb-thread
+ (let ((sem (sb-thread:make-semaphore))
+ (refs nil))
+ (handler-case
+ (progn
+ (sb-thread:interrupt-thread
+ object
+ (lambda ()
+ (setf refs (sb-thread::%thread-local-references))
+ (sb-vm::map-stack-references (lambda (x) (push x refs)))
+ (sb-thread:signal-semaphore sem)))
+ (sb-thread:wait-on-semaphore sem))
+ (sb-thread:interrupt-thread-error ()))
+ (mapc #'call refs))))))
+ (array
+ (if (simple-vector-p object)
+ (dotimes (i (length object))
+ (call (aref object i)))
+ (when (sb-kernel:array-header-p object)
+ (call (sb-kernel::%array-data-vector object))
+ (call (sb-kernel::%array-displaced-p object))
+ (unless simple
+ (call (sb-kernel::%array-displaced-from object))))))
+ (sb-kernel:code-component
+ (call (sb-kernel:%code-entry-points object))
+ (call (sb-kernel:%code-debug-info object))
+ (loop for i from sb-vm:code-constants-offset
+ below (sb-kernel:get-header-data object)
+ do (call (sb-kernel:code-header-ref object i))))
+ (sb-kernel:fdefn
+ (call (sb-kernel:fdefn-name object))
+ (call (sb-kernel:fdefn-fun object)))
+ (sb-kernel:simple-fun
+ (unless simple
+ (call (sb-kernel:%simple-fun-next object)))
+ (call (sb-kernel:fun-code-header object))
+ (call (sb-kernel:%simple-fun-name object))
+ (call (sb-kernel:%simple-fun-arglist object))
+ (call (sb-kernel:%simple-fun-type object))
+ (call (sb-kernel:%simple-fun-info object)))
+ (sb-kernel:closure
+ (call (sb-kernel:%closure-fun object))
+ (sb-kernel:do-closure-values (x object)
+ (call x)))
+ (sb-kernel:funcallable-instance
+ (call (sb-kernel:%funcallable-instance-function object))
+ (loop for i from 1 below (- (1+ (sb-kernel:get-closure-length object))
+ sb-vm::funcallable-instance-info-offset)
+ do (call (sb-kernel:%funcallable-instance-info object i))))
+ (symbol
+ (when ext
+ (dolist (thread (sb-thread:list-all-threads))
+ (call (sb-thread:symbol-value-in-thread object thread nil))))
+ (handler-case
+ ;; We don't have GLOBAL-BOUNDP, and there's no ERRORP arg.
+ (call (sb-ext:symbol-global-value object))
+ (unbound-variable ()))
+ (when (and ext (ignore-errors (fboundp object)))
+ (call (fdefinition object))
+ (call (macro-function object))
+ (let ((class (find-class object nil)))
+ (when class (call class))))
+ (call (symbol-plist object))
+ (call (symbol-name object))
+ (unless simple
+ (call (symbol-package object))))
+ (sb-kernel::random-class
+ (case (sb-kernel:widetag-of object)
+ (#.sb-vm::value-cell-header-widetag
+ (call (sb-kernel::value-cell-ref object)))
+ #+(and sb-lutex sb-thread)
+ (#.sb-vm::lutex-widetag)
+ (t
+ (warn "~&MAP-ROOT: Unknown widetag ~S: ~S~%"
+ (sb-kernel:widetag-of object) object)))))))
+ object)
projects / sbcl.git / blobdiff