,@forms)))
\f
;;;; error code
-(eval-when (#-sb-xc :compile-toplevel :load-toplevel :execute)
- (defun emit-error-break (vop kind code values)
- (let ((vector (gensym)))
- `((progn
- #-darwin (inst int 3) ; i386 breakpoint instruction
- ;; CLH 20060314
- ;; On Darwin, we need to use #x0b0f instead of int3 in order
- ;; to generate a SIGILL instead of a SIGTRAP as darwin/x86
- ;; doesn't seem to be reliably firing SIGTRAP
- ;; handlers. Hopefully this will be fixed by Apple at a
- ;; later date.
- #+darwin (inst word #x0b0f))
- ;; The return PC points here; note the location for the debugger.
- (let ((vop ,vop))
- (when vop
- (note-this-location vop :internal-error)))
- (inst byte ,kind) ; eg trap_Xyyy
- (with-adjustable-vector (,vector) ; interr arguments
- (write-var-integer (error-number-or-lose ',code) ,vector)
- ,@(mapcar (lambda (tn)
- `(let ((tn ,tn))
- ;; classic CMU CL comment:
- ;; zzzzz jrd here. tn-offset is zero for constant
- ;; tns.
- (write-var-integer (make-sc-offset (sc-number
- (tn-sc tn))
- (or (tn-offset tn)
- 0))
- ,vector)))
- values)
- (inst byte (length ,vector))
- (dotimes (i (length ,vector))
- (inst byte (aref ,vector i))))))))
-
-(defmacro error-call (vop error-code &rest values)
+(defun emit-error-break (vop kind code values)
+ (assemble ()
+ #!-darwin
+ (inst int 3) ; i386 breakpoint instruction
+ ;; CLH 20060314
+ ;; On Darwin, we need to use #x0b0f instead of int3 in order
+ ;; to generate a SIGILL instead of a SIGTRAP as darwin/x86
+ ;; doesn't seem to be reliably firing SIGTRAP
+ ;; handlers. Hopefully this will be fixed by Apple at a
+ ;; later date.
+ #!+darwin
+ (inst word #x0b0f)
+ ;; The return PC points here; note the location for the debugger.
+ (when vop
+ (note-this-location vop :internal-error))
+ (inst byte kind) ; e.g. trap_xyyy
+ (with-adjustable-vector (vector) ; interr arguments
+ (write-var-integer code vector)
+ (dolist (tn values)
+ ;; classic CMU CL comment:
+ ;; zzzzz jrd here. tn-offset is zero for constant
+ ;; tns.
+ (write-var-integer (make-sc-offset (sc-number (tn-sc tn))
+ (or (tn-offset tn) 0))
+ vector))
+ (inst byte (length vector))
+ (dotimes (i (length vector))
+ (inst byte (aref vector i))))))
+
+(defun error-call (vop error-code &rest values)
#!+sb-doc
"Cause an error. ERROR-CODE is the error to cause."
- (cons 'progn
- (emit-error-break vop error-trap error-code values)))
+ (emit-error-break vop error-trap (error-number-or-lose error-code) values))
-(defmacro generate-error-code (vop error-code &rest values)
+(defun generate-error-code (vop error-code &rest values)
#!+sb-doc
"Generate-Error-Code Error-code Value*
Emit code for an error with the specified Error-Code and context Values."
- `(assemble (*elsewhere*)
- (let ((start-lab (gen-label)))
- (emit-label start-lab)
- (error-call ,vop ,error-code ,@values)
- start-lab)))
+ (assemble (*elsewhere*)
+ (let ((start-lab (gen-label)))
+ (emit-label start-lab)
+ (emit-error-break vop error-trap (error-number-or-lose error-code) values)
+ start-lab)))
\f
;;;; PSEUDO-ATOMIC
;;; does not matter whether a signal occurs during construction of a
;;; dynamic-extent object, as the half-finished construction of the
;;; object will not cause any difficulty. We can therefore elide
-(defmacro maybe-pseudo-atomic (really-p &body forms)
- `(if ,really-p
+(defmacro maybe-pseudo-atomic (not-really-p &body forms)
+ `(if ,not-really-p
(progn ,@forms)
(pseudo-atomic ,@forms)))
(move result value)))))
;;; helper for alien stuff.
+
(def!macro with-pinned-objects ((&rest objects) &body body)
"Arrange with the garbage collector that the pages occupied by
-OBJECTS will not be moved in memory for the duration of BODY. Useful
-for e.g. foreign calls where another thread may trigger garbage
-collection"
+OBJECTS will not be moved in memory for the duration of BODY.
+Useful for e.g. foreign calls where another thread may trigger
+collection."
(if objects
- `(multiple-value-prog1
- (progn
- ,@(loop for p in objects
- collect
- ;; There is no race here wrt to gc, because at every
- ;; point during the execution there is a reference to
- ;; P on the stack or in a register.
- `(push-word-on-c-stack
- (int-sap (sb!kernel:get-lisp-obj-address ,p))))
- ,@body)
- ;; If the body returned normally, we should restore the stack pointer
- ;; for the benefit of any following code in the same function. If
- ;; there's a non-local exit in the body, sp is garbage anyway and
- ;; will get set appropriately from {a, the} frame pointer before it's
- ;; next needed
- (pop-words-from-c-stack ,(length objects)))
+ (let ((pins (make-gensym-list (length objects)))
+ (wpo (block-gensym "WPO")))
+ ;; BODY is stuffed in a function to preserve the lexical
+ ;; environment.
+ `(flet ((,wpo () (progn ,@body)))
+ ;; PINS are dx-allocated in case the compiler for some
+ ;; unfathomable reason decides to allocate value-cells
+ ;; for them -- since we have DX value-cells on x86oid
+ ;; platforms this still forces them on the stack.
+ (dx-let ,(mapcar #'list pins objects)
+ (multiple-value-prog1 (,wpo)
+ ;; TOUCH-OBJECT has a VOP with an empty body: compiler
+ ;; thinks we're using the argument and doesn't flush
+ ;; the variable, but we don't have to pay any extra
+ ;; beyond that -- and MULTIPLE-VALUE-PROG1 keeps them
+ ;; live till the body has finished. *whew*
+ ,@(mapcar (lambda (pin)
+ `(touch-object ,pin))
+ pins)))))
`(progn ,@body)))
projects / sbcl.git / blobdiff