don't stack-allocate specialized vectors on non-conservtive control stacks

[sbcl.git] / src / code / gc.lisp

diff --git a/src/code/gc.lisp b/src/code/gc.lisp
index 2d2dc84..b477d98 100644 (file)
--- a/src/code/gc.lisp
+++ b/src/code/gc.lisp
@@ -157,10 +157,6 @@ run in any thread.")
 (progn
   (sb!alien:define-alien-variable ("gc_logfile" %gc-logfile) (* char))
   (defun (setf gc-logfile) (pathname)
-    "Use PATHNAME to log garbage collections. If non-null, the
-designated file is opened before and after each collection, and
-generation statistics are appended to it. To stop writing the log, use
-NIL as the pathname."
     (let ((new (when pathname
                  (sb!alien:make-alien-string
                   (native-namestring (translate-logical-pathname pathname)
@@ -170,12 +166,17 @@ NIL as the pathname."
       (when old
         (sb!alien:free-alien old))))
   (defun gc-logfile ()
-    "Return the name of the current GC logfile."
+    #!+sb-doc
+    "Return the pathname used to log garbage collections. Can be SETF.
+Default is NIL, meaning collections are not logged. If non-null, the
+designated file is opened before and after each collection, and generation
+statistics are appended to it."
     (let ((val %gc-logfile))
       (when val
         (native-pathname (cast val c-string)))))
   (declaim (inline dynamic-space-size))
   (defun dynamic-space-size ()
+    "Size of the dynamic space in bytes."
     (sb!alien:extern-alien "dynamic_space_size" os-vm-size-t)))
 \f
 ;;;; SUB-GC
@@ -303,13 +304,28 @@ NIL as the pathname."
           (call-hooks "after-GC" *after-gc-hooks* :on-error :warn))))))
 
 ;;; This is the user-advertised garbage collection function.
-(defun gc (&key (gen 0) (full nil) &allow-other-keys)
+(defun gc (&key (full nil) (gen 0) &allow-other-keys)
   #!+(and sb-doc gencgc)
-  "Initiate a garbage collection. GEN controls the number of generations
-  to garbage collect."
+  "Initiate a garbage collection.
+
+The default is to initiate a nursery collection, which may in turn
+trigger a collection of one or more older generations as well. If FULL
+is true, all generations are collected. If GEN is provided, it can be
+used to specify the oldest generation guaranteed to be collected.
+
+On CheneyGC platforms arguments FULL and GEN take no effect: a full
+collection is always preformed."
   #!+(and sb-doc (not gencgc))
-  "Initiate a garbage collection. GEN may be provided for compatibility with
-  generational garbage collectors, but is ignored in this implementation."
+  "Initiate a garbage collection.
+
+The collection is always a full collection.
+
+Arguments FULL and GEN can be used for compatibility with GENCGC
+platforms: there the default is to initiate a nursery collection,
+which may in turn trigger a collection of one or more older
+generations as well. If FULL is true, all generations are collected.
+If GEN is provided, it can be used to specify the oldest generation
+guaranteed to be collected."
   (when (sub-gc :gen (if full 6 gen))
     (post-gc)))
 
@@ -434,8 +450,8 @@ Experimental: interface subject to change."
     t)
   (def number-of-gcs-before-promotion
       "Number of times garbage collection is done on GENERATION before
-automatic promotion to the next generation is triggered. Can be assigned to
-using SETF. Available on GENCGC platforms only.
+automatic promotion to the next generation is triggered. Default is 1. Can be
+assigned to using SETF. Available on GENCGC platforms only.
 
 Experimental: interface subject to change."
     t)