Fix deadlocks in GC on Windows.

[sbcl.git] / src / compiler / x86-64 / subprim.lisp

diff --git a/src/compiler/x86-64/subprim.lisp b/src/compiler/x86-64/subprim.lisp
index 74692e8..a779d13 100644 (file)
--- a/src/compiler/x86-64/subprim.lisp
+++ b/src/compiler/x86-64/subprim.lisp
@@ -18,17 +18,18 @@
   (:translate length)
   (:args (object :scs (descriptor-reg control-stack) :target ptr))
   (:arg-types list)
-  (:temporary (:sc unsigned-reg :offset eax-offset) eax)
+  (:temporary (:sc dword-reg :offset eax-offset) eax)
   (:temporary (:sc descriptor-reg :from (:argument 0)) ptr)
   (:results (count :scs (any-reg)))
   (:result-types positive-fixnum)
   (:policy :fast-safe)
   (:vop-var vop)
   (:save-p :compute-only)
+  (:ignore eax)
   (:generator 40
     ;; Move OBJECT into a temp we can bash on, and initialize the count.
     (move ptr object)
-    (inst xor count count)
+    (zeroize count)
     ;; If we are starting with NIL, then it's really easy.
     (inst cmp ptr nil-value)
     (inst jmp :e DONE)
@@ -43,12 +44,9 @@
     (inst jmp :e DONE)
     ;; Otherwise, check to see whether we hit the end of a dotted list. If
     ;; not, loop back for more.
-    (move eax ptr)
-    (inst and al-tn lowtag-mask)
-    (inst cmp al-tn list-pointer-lowtag)
-    (inst jmp :e LOOP)
+    (%test-lowtag ptr LOOP nil list-pointer-lowtag)
     ;; It's dotted all right. Flame out.
-    (error-call vop object-not-list-error ptr)
+    (error-call vop 'object-not-list-error ptr)
     ;; We be done.
     DONE))
 
@@ -66,7 +64,7 @@
     ;; Get a copy of OBJECT in a register we can bash on, and
     ;; initialize COUNT.
     (move ptr object)
-    (inst xor count count)
+    (zeroize count)
     ;; If we are starting with NIL, we be done.
     (inst cmp ptr nil-value)
     (inst jmp :e DONE)
@@ -80,3 +78,5 @@
     DONE))
 
 (define-static-fun length (object) :translate length)
+(define-static-fun %coerce-callable-to-fun (callable)
+  :translate %coerce-callable-to-fun)