correct octets in c-string decoding errors

[sbcl.git] / src / code / fd-stream.lisp

diff --git a/src/code/fd-stream.lisp b/src/code/fd-stream.lisp
index 69505b8..311a4b9 100644 (file)
--- a/src/code/fd-stream.lisp
+++ b/src/code/fd-stream.lisp
@@ -52,25 +52,16 @@
   #!+sb-doc
   "List of available buffers.")
 
-(defvar *available-buffers-spinlock* (sb!thread::make-spinlock
-                                      :name "lock for *AVAILABLE-BUFFERS*")
+(defvar *available-buffers-lock* (sb!thread:make-mutex
+                                  :name "lock for *AVAILABLE-BUFFERS*")
   #!+sb-doc
   "Mutex for access to *AVAILABLE-BUFFERS*.")
 
 (defmacro with-available-buffers-lock ((&optional) &body body)
-  ;; CALL-WITH-SYSTEM-SPINLOCK because
-  ;;
-  ;; 1. streams are low-level enough to be async signal safe, and in
-  ;;    particular a C-c that brings up the debugger while holding the
-  ;;    mutex would lose badly
-  ;;
-  ;; 2. this can potentially be a fairly busy (but also probably
-  ;;    uncontended) lock, so we don't want to pay the syscall per
-  ;;    release -- hence a spinlock.
-  ;;
-  ;; ...again, once we have smarted locks the spinlock here can become
-  ;; a mutex.
-  `(sb!thread::with-system-spinlock (*available-buffers-spinlock*)
+  ;; CALL-WITH-SYSTEM-MUTEX because streams are low-level enough to be
+  ;; async signal safe, and in particular a C-c that brings up the
+  ;; debugger while holding the mutex would lose badly.
+  `(sb!thread::with-system-mutex (*available-buffers-lock*)
      ,@body))
 
 (defconstant +bytes-per-buffer+ (* 4 1024)
@@ -452,11 +443,10 @@
   (error 'c-string-encoding-error
          :external-format external-format
          :code code))
-
-(defun c-string-decoding-error (external-format octets)
+(defun c-string-decoding-error (external-format sap offset count)
   (error 'c-string-decoding-error
          :external-format external-format
-         :octets octets))
+         :octets (sap-ref-octets sap offset count)))
 
 ;;; Returning true goes into end of file handling, false will enter another
 ;;; round of input buffer filling followed by re-entering character decode.
@@ -1603,7 +1593,8 @@
                                    (incf head size)
                                    nil))
                            (when decode-break-reason
-                             (c-string-decoding-error ,name decode-break-reason))
+                             (c-string-decoding-error
+                              ,name sap head decode-break-reason))
                            (when (zerop (char-code char))
                              (return count))))
                  (string (make-string length :element-type element-type)))
@@ -1622,7 +1613,8 @@
                       (incf head size)
                       nil))
               (when decode-break-reason
-                (c-string-decoding-error ,name decode-break-reason))
+                (c-string-decoding-error
+                 ,name sap head decode-break-reason))
               (setf (aref string index) char)))))
 
       (defun ,output-c-string-function (string)