X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Falloc.lisp;h=c7b76f9e004a79292345b834030a00d6316f640c;hb=1d881f74d4c2c6099107544a5f337837eb281865;hp=5ae0275672b9f66d9e775bf1c2098719a7a3eee6;hpb=dc9fb9111cb1b645aaede0d3ec019c0f78200be0;p=sbcl.git

diff --git a/src/code/alloc.lisp b/src/code/alloc.lisp
index 5ae0275..c7b76f9 100644
--- a/src/code/alloc.lisp
+++ b/src/code/alloc.lisp
@@ -22,31 +22,25 @@
   (declare (type (unsigned-byte #.n-widetag-bits) widetag)
            (type (unsigned-byte #.n-word-bits) words)
            (type index length))
-  (handler-case
-      ;; WITHOUT-GCING implies WITHOUT-INTERRUPTS
-      (without-gcing
-        (let* ((pointer *static-space-free-pointer*) ; in words
-               (free (* pointer n-word-bytes))
-               (vector (logior free other-pointer-lowtag)) ; in bytes, yay
-               ;; rounded to dual word boundary
-               (nwords (logandc2 (+ lowtag-mask (+ words vector-data-offset 1))
-                                 lowtag-mask))
-               (new-pointer (+ *static-space-free-pointer* nwords))
-               (new-free (* new-pointer n-word-bytes)))
-          ;; FIXME: don't signal while in WITHOUT-GCING, the handler
-          ;; risks deadlock with SIG_STOP_FOR_GC.
-          (unless (> static-space-end new-free)
-            (error 'simple-storage-condition
-                   :format-control "Not enough memory left in static space to ~
-                                    allocate vector."))
-          (store-word widetag
-                      vector 0 other-pointer-lowtag)
-          (store-word (ash length word-shift)
-                      vector vector-length-slot other-pointer-lowtag)
-          (store-word 0 new-free)
-          (setf *static-space-free-pointer* new-pointer)
-          (%make-lisp-obj vector)))
-    (serious-condition (c)
-      ;; unwind from WITHOUT-GCING
-      (error c))))
+  ;; WITHOUT-GCING implies WITHOUT-INTERRUPTS
+  (or
+   (without-gcing
+     (let* ((pointer (ash *static-space-free-pointer* n-fixnum-tag-bits))
+            (vector (logior pointer other-pointer-lowtag))
+            ;; rounded to dual word boundary
+            (nwords (logandc2 (+ lowtag-mask (+ words vector-data-offset 1))
+                              lowtag-mask))
+            (new-pointer (+ pointer (ash nwords word-shift))))
+       (when (> static-space-end new-pointer)
+         (store-word widetag
+                     vector 0 other-pointer-lowtag)
+         (store-word (fixnumize length)
+                     vector vector-length-slot other-pointer-lowtag)
+         (store-word 0 new-pointer)
+         (setf *static-space-free-pointer*
+               (ash new-pointer (- n-fixnum-tag-bits)))
+         (%make-lisp-obj vector))))
+   (error 'simple-storage-condition
+          :format-control "Not enough memory left in static space to ~
+                           allocate vector.")))