(in-package "SB!FASL")
\f
+;;;; There looks to be an exciting amount of state being modified
+;;;; here: certainly enough that I (dan, 2003.1.22) don't want to mess
+;;;; around deciding how to thread-safetify it. So we use a Big Lock.
+;;;; Because this code is mutually recursive with the compiler, we use
+;;;; the *big-compiler-lock*
+
;;;; miscellaneous load utilities
;;; Output the current number of semicolons after a fresh-line.
(progn ,@forms)
(setq *fop-stack-pointer* ,n-index)))))))
\f
+;;;; Conditions signalled on invalid fasls (wrong fasl version, etc),
+;;;; so that user code (esp. ASDF) can reasonably handle attempts to
+;;;; load such fasls by recompiling them, etc. For simplicity's sake
+;;;; make only condition INVALID-FASL part of the public interface,
+;;;; and keep the guts internal.
+
+(define-condition invalid-fasl (error)
+ ((stream :reader invalid-fasl-stream :initarg :stream)
+ (expected :reader invalid-fasl-expected :initarg :expected))
+ (:report
+ (lambda (condition stream)
+ (format stream "~S is an invalid fasl file."
+ (invalid-fasl-stream condition)))))
+
+(define-condition invalid-fasl-header (invalid-fasl)
+ ((byte :reader invalid-fasl-byte :initarg :byte)
+ (byte-nr :reader invalid-fasl-byte-nr :initarg :byte-nr))
+ (:report
+ (lambda (condition stream)
+ (format stream "~@<~S contains an illegal byte in the FASL header at ~
+ position ~A: Expected ~A, got ~A.~:@>"
+ (invalid-fasl-stream condition)
+ (invalid-fasl-byte-nr condition)
+ (invalid-fasl-byte condition)
+ (invalid-fasl-expected condition)))))
+
+(define-condition invalid-fasl-version (invalid-fasl)
+ ((variant :reader invalid-fasl-variant :initarg :variant)
+ (version :reader invalid-fasl-version :initarg :version))
+ (:report
+ (lambda (condition stream)
+ (format stream "~@<~S is in ~A fasl file format version ~W, ~
+ but this version of SBCL uses format version ~W.~:@>"
+ (invalid-fasl-stream condition)
+ (invalid-fasl-variant condition)
+ (invalid-fasl-version condition)
+ (invalid-fasl-expected condition)))))
+
+(define-condition invalid-fasl-implementation (invalid-fasl)
+ ((implementation :reader invalid-fasl-implementation
+ :initarg :implementation))
+ (:report
+ (lambda (condition stream)
+ (format stream "~S was compiled for implementation ~A, but this is a ~A."
+ (invalid-fasl-stream condition)
+ (invalid-fasl-implementation condition)
+ (invalid-fasl-expected condition)))))
+
+(define-condition invalid-fasl-features (invalid-fasl)
+ ((potential-features :reader invalid-fasl-potential-features
+ :initarg :potential-features)
+ (features :reader invalid-fasl-features :initarg :features))
+ (:report
+ (lambda (condition stream)
+ (format stream "~@<incompatible ~S in fasl file ~S: ~2I~_~
+ Of features affecting binary compatibility, ~4I~_~S~2I~_~
+ the fasl has ~4I~_~A,~2I~_~
+ while the runtime expects ~4I~_~A.~:>"
+ '*features*
+ (invalid-fasl-stream condition)
+ (invalid-fasl-potential-features condition)
+ (invalid-fasl-features condition)
+ (invalid-fasl-expected condition)))))
+
;;;; LOAD-AS-FASL
;;;;
;;;; Note: LOAD-AS-FASL is used not only by LOAD, but also (with
(let ((byte (read-byte stream nil)))
(when byte
- ;; Read the string part of the fasl header, or die.
+ ;; Read and validate constant string prefix in fasl header.
(let* ((fhsss *fasl-header-string-start-string*)
(fhsss-length (length fhsss)))
(unless (= byte (char-code (schar fhsss 0)))
- (error "illegal first byte in fasl file header"))
+ (error 'invalid-fasl-header
+ :stream stream
+ :first-byte-p t
+ :byte byte
+ :expected (char-code (schar fhsss 0))))
(do ((byte (read-byte stream) (read-byte stream))
(count 1 (1+ count)))
((= byte +fasl-header-string-stop-char-code+)
(declare (fixnum byte count))
(when (and (< count fhsss-length)
(not (eql byte (char-code (schar fhsss count)))))
- (error
- "illegal subsequent (not first) byte in fasl file header"))))
-
- ;; Read and validate implementation and version, or die.
- (let* ((implementation-length (read-arg 4))
- (implementation-string (make-string implementation-length))
- (ignore (read-string-as-bytes stream implementation-string))
- (implementation (keywordicate implementation-string))
- ;; FIXME: The logic above to read a keyword from the fasl file
- ;; could probably be shared with the read-a-keyword fop.
- (version (read-arg 4)))
- (declare (ignore ignore))
- (flet ((check-version (variant possible-implementation needed-version)
- (when (string= possible-implementation implementation)
- (unless (= version needed-version)
- (error "~@<~S is in ~A fasl file format version ~W, ~
- but this version of SBCL uses ~
- format version ~W.~:@>"
- stream
- variant
- version
- needed-version))
- t)))
- (or (check-version "native code"
- +backend-fasl-file-implementation+
- +fasl-file-version+)
- (error "~S was compiled for implementation ~A, but this is a ~A."
- stream
- implementation
- +backend-fasl-file-implementation+)))))))
+ (error 'invalid-fasl-header
+ :stream stream
+ :byte-nr count
+ :byte byte
+ :expected (char-code (schar fhsss count))))))
+
+ ;; Read and validate version-specific compatibility stuff.
+ (flet ((string-from-stream ()
+ (let* ((length (read-arg 4))
+ (result (make-string length)))
+ (read-string-as-bytes stream result)
+ result)))
+ ;; Read and validate implementation and version.
+ (let* ((implementation (keywordicate (string-from-stream)))
+ ;; FIXME: The logic above to read a keyword from the fasl file
+ ;; could probably be shared with the read-a-keyword fop.
+ (version (read-arg 4)))
+ (flet ((check-version (variant
+ possible-implementation
+ needed-version)
+ (when (string= possible-implementation implementation)
+ (or (= version needed-version)
+ (error 'invalid-fasl-version
+ ;; :error :wrong-version
+ :stream stream
+ :variant variant
+ :version version
+ :expected needed-version)))))
+ (or (check-version "native code"
+ +backend-fasl-file-implementation+
+ +fasl-file-version+)
+ (error 'invalid-fasl-implementation
+ :stream stream
+ :implementation implementation
+ :expected +backend-fasl-file-implementation+))))
+ ;; Read and validate *FEATURES* which affect binary compatibility.
+ (let ((faff-in-this-file (string-from-stream)))
+ (unless (string= faff-in-this-file *features-affecting-fasl-format*)
+ (error 'invalid-fasl-features
+ :stream stream
+ :potential-features *features-potentially-affecting-fasl-format*
+ :expected *features-affecting-fasl-format*
+ :features faff-in-this-file)))
+ ;; success
+ t))))
;; Setting this variable gives you a trace of fops as they are loaded and
;; executed.
(when (zerop (file-length stream))
(error "attempt to load an empty FASL file:~% ~S" (namestring stream)))
(maybe-announce-load stream verbose)
- (let* ((*fasl-input-stream* stream)
- (*current-fop-table* (or (pop *free-fop-tables*) (make-array 1000)))
- (*current-fop-table-size* (length *current-fop-table*))
- (*fop-stack-pointer-on-entry* *fop-stack-pointer*))
- (unwind-protect
- ;; FIXME: This should probably become
- ;; (LOOP WHILE (LOAD-FASL-GROUP-STREAM))
- ;; but as a LOOP newbie I don't want to do that until I can
- ;; test it.
- (do ((loaded-group (load-fasl-group stream) (load-fasl-group stream)))
- ((not loaded-group)))
- (setq *fop-stack-pointer* *fop-stack-pointer-on-entry*)
- (push *current-fop-table* *free-fop-tables*)
- ;; NIL out the stack and table, so that we don't hold onto garbage.
- ;;
- ;; FIXME: Couldn't we just get rid of the free fop table pool so
- ;; that some of this NILing out would go away?
- (fill *fop-stack* nil :end *fop-stack-pointer-on-entry*)
- (fill *current-fop-table* nil)))
+ (sb!thread:with-recursive-lock (sb!c::*big-compiler-lock*)
+ (let* ((*fasl-input-stream* stream)
+ (*current-fop-table* (or (pop *free-fop-tables*) (make-array 1000)))
+ (*current-fop-table-size* (length *current-fop-table*))
+ (*fop-stack-pointer-on-entry* *fop-stack-pointer*))
+ (unwind-protect
+ (loop while (load-fasl-group stream))
+ (setq *fop-stack-pointer* *fop-stack-pointer-on-entry*)
+ (push *current-fop-table* *free-fop-tables*)
+ ;; NIL out the stack and table, so that we don't hold onto garbage.
+ ;;
+ ;; FIXME: Couldn't we just get rid of the free fop table pool so
+ ;; that some of this NILing out would go away?
+ (fill *fop-stack* nil :end *fop-stack-pointer-on-entry*)
+ (fill *current-fop-table* nil))))
t)
;;; This is used in in target-load and also genesis, using
;;; code for foreign symbol lookup should be here.
(defun find-foreign-symbol-in-table (name table)
(let ((prefixes
- #!+(or linux freebsd) #("" "ldso_stub__")
- #!+openbsd #("" "_")))
+ #!+(or osf1 sunos linux freebsd darwin) #("" "ldso_stub__")
+ #!+openbsd #("")))
+ (declare (notinline some)) ; to suppress bug 117 bogowarning
(some (lambda (prefix)
(gethash (concatenate 'string prefix name)
table
nil))
prefixes)))
-
\f
;;;; stuff for debugging/tuning by collecting statistics on FOPs (?)