(abort-ir1-transform "too many indices for pointer deref: ~W"
(length indices)))
(let ((element-type (alien-pointer-type-to alien-type)))
+ (unless element-type
+ (give-up-ir1-transform "unable to open code deref of wild pointer type"))
(if indices
(let ((bits (alien-type-bits element-type))
(alignment (alien-type-alignment element-type)))
`(lambda (function ,@names)
(alien-funcall (deref function) ,@names))))
-(deftransform alien-funcall ((function &rest args) * * :important t)
+;;; Frame pointer, program counter conses. In each thread it's bound
+;;; locally or not bound at all.
+(defvar *saved-fp-and-pcs*)
+
+#!+:c-stack-is-control-stack
+(declaim (inline invoke-with-saved-fp-and-pc))
+#!+:c-stack-is-control-stack
+(defun invoke-with-saved-fp-and-pc (fn)
+ (declare #-sb-xc-host (muffle-conditions compiler-note)
+ (optimize (speed 3)))
+ (let* ((fp-and-pc (cons (%caller-frame)
+ (sap-int (%caller-pc)))))
+ (declare (truly-dynamic-extent fp-and-pc))
+ (let ((*saved-fp-and-pcs* (if (boundp '*saved-fp-and-pcs*)
+ (cons fp-and-pc *saved-fp-and-pcs*)
+ (list fp-and-pc))))
+ (declare (truly-dynamic-extent *saved-fp-and-pcs*))
+ (funcall fn))))
+
+(defun find-saved-fp-and-pc (fp)
+ (when (boundp '*saved-fp-and-pcs*)
+ (dolist (x *saved-fp-and-pcs*)
+ (when (#!+:stack-grows-downward-not-upward
+ sap>
+ #!-:stack-grows-downward-not-upward
+ sap<
+ (int-sap (get-lisp-obj-address (car x))) fp)
+ (return (values (car x) (cdr x)))))))
+
+(deftransform alien-funcall ((function &rest args) * * :node node :important t)
(let ((type (lvar-type function)))
(unless (alien-type-type-p type)
(give-up-ir1-transform "can't tell function type at compile time"))
`(multiple-value-bind ,(temps) ,body
(values ,@(results)))))
(setf body `(naturalize ,body ',return-type)))
+ ;; Remember this frame to make sure that we can get back
+ ;; to it later regardless of how the foreign stack looks
+ ;; like.
+ #!+:c-stack-is-control-stack
+ (when (policy node (<= speed debug))
+ (setf body `(invoke-with-saved-fp-and-pc (lambda () ,body))))
(/noshow "returning from DEFTRANSFORM ALIEN-FUNCALL" (params) body)
`(lambda (function ,@(params))
,body)))))))
(error "Something is broken."))
(values-specifier-type
(compute-alien-rep-type
- (alien-fun-type-result-type type)))))
+ (alien-fun-type-result-type type)
+ :result))))
(defoptimizer (%alien-funcall ltn-annotate)
((function type &rest args) node ltn-policy)