0.pre7.90:
[sbcl.git] / src / code / target-load.lisp
index fe2bd03..0c8e9b6 100644 (file)
 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
 ;;;; files for more information.
 
-(in-package "SB!IMPL")
+(in-package "SB!FASL")
 
 (defvar *load-source-default-type* "lisp"
   #!+sb-doc
   "The source file types which LOAD looks for by default.")
 
+(declaim (type (or pathname null) *load-truename* *load-pathname*))
 (defvar *load-truename* nil
   #!+sb-doc
   "the TRUENAME of the file that LOAD is currently loading")
-
 (defvar *load-pathname* nil
   #!+sb-doc
   "the defaulted pathname that LOAD is currently loading")
-
-(declaim (type (or pathname null) *load-truename* *load-pathname*))
 \f
 ;;;; LOAD-AS-SOURCE
 
@@ -40,7 +38,7 @@
        (let ((results (multiple-value-list (eval sexpr))))
          (load-fresh-line)
          (format t "~{~S~^, ~}~%" results))
-       (eval sexpr))))
+      (eval sexpr))))
 \f
 ;;;; LOAD itself
 
       (t
        (let ((first-line (with-open-file (stream truename :direction :input)
                           (read-line stream nil)))
-            (fhs sb!c:*fasl-header-string-start-string*))
+            (fhsss *fasl-header-string-start-string*))
         (cond
          ((and first-line
                (>= (length (the simple-string first-line))
-                   (length fhs))
-               (string= first-line fhs :end1 (length fhs)))
+                   (length fhsss))
+               (string= first-line fhsss :end1 (length fhsss)))
           (internal-load pathname truename if-does-not-exist verbose print
                          :binary))
          (t
-          (when (string= (pathname-type truename)
-                         sb!c:*backend-fasl-file-type*)
+          (when (string= (pathname-type truename) *fasl-file-type*)
             (error "File has a fasl file type, but no fasl file header:~%  ~S"
                    (namestring truename)))
           (internal-load pathname truename if-does-not-exist verbose print
   (multiple-value-bind (src-pn src-tn)
       (try-default-type pathname *load-source-default-type*)
     (multiple-value-bind (obj-pn obj-tn)
-       (try-default-type pathname sb!c:*backend-fasl-file-type*)
+       (try-default-type pathname *fasl-file-type*)
       (cond
        ((and obj-tn
             src-tn
                        '(unsigned-byte 8)))
             (load-as-fasl filespec verbose print)
             (load-as-source filespec verbose print))
-        (let ((pn (merge-pathnames (pathname filespec)
-                                   *default-pathname-defaults*)))
-          (if (wild-pathname-p pn)
-              (let ((files (directory pn)))
+        (let (;; FIXME: MERGE-PATHNAMES doesn't work here for
+              ;; FILESPEC="TEST:Load-Test" and
+              ;; (LOGICAL-PATHNAME-TRANSLATIONS "TEST")
+              ;;   = (("**;*.*.*" "/foo/bar/**/*.*")).
+              ;; Physicalizing the pathname before merging 
+              ;; is a workaround, but the ANSI spec talks about
+              ;; MERGE-PATHNAMES accepting (and returning)
+              ;; logical pathnames, so a true fix would probably
+              ;; include fixing MERGE-PATHNAMES, then probably
+              ;; revisiting this code.
+              (ppn (physicalize-pathname (pathname filespec))))
+          (if (wild-pathname-p ppn)
+              (let ((files (directory ppn)))
                 #!+high-security
                 (when (null files)
                   (error 'file-error :pathname filespec))
                 (dolist (file files t)
-                  (internal-load pn
+                  (internal-load ppn
                                  file
                                  internal-if-does-not-exist
                                  verbose
                                  print)))
-              (let ((tn (probe-file pn)))
-                (if (or tn (pathname-type pn))
-                    (internal-load pn
+              (let ((tn (probe-file ppn)))
+                (if (or tn (pathname-type ppn))
+                    (internal-load ppn
                                    tn
                                    internal-if-does-not-exist
                                    verbose
                                    print)
                     (internal-load-default-type
-                     pn
+                     ppn
                      internal-if-does-not-exist
                      verbose
                      print)))))))))
   (declare (fixnum box-num code-length))
   (with-fop-stack t
     (let ((code (%primitive sb!c:allocate-code-object box-num code-length))
-         (index (+ #!-gengc sb!vm:code-trace-table-offset-slot
-                   #!+gengc sb!vm:code-debug-info-slot
-                   box-num)))
+         (index (+ sb!vm:code-trace-table-offset-slot box-num)))
       (declare (type index index))
-      #!-gengc (setf (%code-debug-info code) (pop-stack))
+      (setf (%code-debug-info code) (pop-stack))
       (dotimes (i box-num)
        (declare (fixnum i))
        (setf (code-header-ref code (decf index)) (pop-stack)))
       (sb!sys:without-gcing
-       (read-n-bytes *fasl-file*
+       (read-n-bytes *fasl-input-stream*
                      (code-instructions code)
                      0
-                     #!-gengc code-length
-                     #!+gengc (* code-length sb!vm:word-bytes)))
+                     code-length))
       code)))
 
+;;; Moving native code during a GC or purify is not so trivial on the
+;;; x86 port.
+;;;
+;;; Our strategy for allowing the loading of x86 native code into the
+;;; dynamic heap requires that the addresses of fixups be saved for
+;;; all these code objects. After a purify these fixups can be
+;;; dropped. In CMU CL, this policy was enabled with
+;;; *ENABLE-DYNAMIC-SPACE-CODE*; in SBCL it's always used.
 #!+x86
 (defun load-code (box-num code-length)
   (declare (fixnum box-num code-length))
        (push (pop-stack) stuff))
       (let* ((dbi (car (last stuff)))  ; debug-info
             (tto (first stuff))        ; trace-table-offset
-            (load-to-dynamic-space
-             (or *enable-dynamic-space-code*
-                 ;; definitely byte-compiled code?
-                 (and *load-byte-compiled-code-to-dynamic-space*
-                      (sb!c::debug-info-p dbi)
-                      (not (sb!c::compiled-debug-info-p dbi)))
-                 ;; or a x86 top level form?
-                 (and *load-x86-tlf-to-dynamic-space*
-                      (sb!c::compiled-debug-info-p dbi)
-                      (string= (sb!c::compiled-debug-info-name dbi)
-                               "top-level form")))) )
+            ;; Old CMU CL code had maybe-we-shouldn't-load-to-dyn-space
+            ;; pussyfooting around here, apparently dating back to the
+            ;; stone age of the X86 port, but in SBCL we always load
+            ;; to dynamic space. FIXME: So now this "variable" could go
+            ;; away entirely.
+            (load-to-dynamic-space t))
 
        (setq stuff (nreverse stuff))
 
-       ;; Check that tto is always a list for byte-compiled
-       ;; code. Could be used an alternate check.
-       (when (and (typep tto 'list)
-                  (not (and (sb!c::debug-info-p dbi)
-                            (not (sb!c::compiled-debug-info-p dbi)))))
-         ;; FIXME: What is this for?
-         (format t "* tto list on non-bc code: ~S~% ~S ~S~%"
-                 stuff dbi tto))
-       
        ;; FIXME: *LOAD-CODE-VERBOSE* should probably be #!+SB-SHOW.
        (when *load-code-verbose*
              (format t "stuff: ~S~%" stuff)
            (declare (fixnum i))
            (setf (code-header-ref code (decf index)) (pop stuff)))
          (sb!sys:without-gcing
-          (read-n-bytes *fasl-file* (code-instructions code) 0 code-length))
+          (read-n-bytes *fasl-input-stream*
+                        (code-instructions code)
+                        0
+                        code-length))
          code)))))
 \f
 ;;;; linkage fixups
 
 (declaim (ftype (function (string) sb!vm:word)
                foreign-symbol-address-as-integer))
+
+
+;;; sb!sys:get-dynamic-foreign-symbol-address is in foreign.lisp, on
+;;; platforms that have dynamic loading
 (defun foreign-symbol-address-as-integer (foreign-symbol)
-  (or (gethash foreign-symbol *static-foreign-symbols*)
-      (gethash (concatenate 'simple-string
-                           #!+linux "ldso_stub__"
-                           #!+openbsd "_"
-                           #!+freebsd "ldso_stub__"
-                           foreign-symbol)
-              *static-foreign-symbols*)
+  (or (find-foreign-symbol-in-table  foreign-symbol *static-foreign-symbols*)
       (sb!sys:get-dynamic-foreign-symbol-address foreign-symbol)
       (error "unknown foreign symbol: ~S" foreign-symbol)))