;;;; files for more information.
(in-package "SB!VM")
+
+;;;; KLUDGE: The primitive objects here may look like self-contained
+;;;; definitions, but in general they're not. In particular, if you
+;;;; try to add a slot to them, beware of the following:
+;;;; * (mysterious crashes which occur after changing the length
+;;;; of SIMPLE-FUN, just adding a new slot not even doing anything
+;;;; with it, still dunno why)
+;;;; * The GC scavenging code (and for all I know other GC code too)
+;;;; is not automatically generated from these layouts, but instead
+;;;; was hand-written to correspond to them. The offsets are
+;;;; automatically propagated into the GC scavenging code, but the
+;;;; existence of slots, and whether they should be scavenged, is
+;;;; not automatically propagated. Thus e.g. if you add a
+;;;; SIMPLE-FUN-DEBUG-INFO slot holding a tagged object which needs
+;;;; to be GCed, you need to tweak scav_code_header() and
+;;;; verify_space() in gencgc.c, and the corresponding code in gc.c.
+;;;; * The src/runtime/print.c code (used by LDB) is implemented
+;;;; using hand-written lists of slot names, which aren't automatically
+;;;; generated from the code in this file.
+;;;; * Various code (e.g. STATIC-FSET in genesis.lisp) is hard-wired
+;;;; to know the name of the last slot of the object the code works
+;;;; with, and implicitly to know that the last slot is special (being
+;;;; the beginning of an arbitrary-length sequence of bytes following
+;;;; the fixed-layout slots).
+;;;; -- WHN 2001-12-29
\f
;;;; the primitive objects themselves
:ref-trans %denominator
:init :arg))
+#!+#.(cl:if (cl:= sb!vm:n-word-bits 32) '(and) '(or))
(define-primitive-object (single-float :lowtag other-pointer-lowtag
:widetag single-float-widetag)
(value :c-type "float"))
(define-primitive-object (double-float :lowtag other-pointer-lowtag
:widetag double-float-widetag)
- (filler)
- (value :c-type "double" :length 2))
+ #!-x86-64 (filler)
+ (value :c-type "double" :length #!-x86-64 2 #!+x86-64 1))
#!+long-float
(define-primitive-object (long-float :lowtag other-pointer-lowtag
(define-primitive-object (array :lowtag other-pointer-lowtag
:widetag t)
+ ;; FILL-POINTER of an ARRAY is in the same place as LENGTH of a
+ ;; VECTOR -- see SHRINK-VECTOR.
(fill-pointer :type index
:ref-trans %array-fill-pointer
:ref-known (flushable foldable)
(define-primitive-object (vector :type vector
:lowtag other-pointer-lowtag
:widetag t)
+ ;; FILL-POINTER of an ARRAY is in the same place as LENGTH of a
+ ;; VECTOR -- see SHRINK-VECTOR.
(length :ref-trans sb!c::vector-length
:type index)
(data :rest-p t :c-type #!-alpha "unsigned long" #!+alpha "u32"))
(define-primitive-object (simple-fun :type function
:lowtag fun-pointer-lowtag
:widetag simple-fun-header-widetag)
- #!-x86 (self :ref-trans %simple-fun-self
+ #!-(or x86 x86-64) (self :ref-trans %simple-fun-self
:set-trans (setf %simple-fun-self))
- #!+x86 (self
+ #!+(or x86 x86-64) (self
;; KLUDGE: There's no :SET-KNOWN, :SET-TRANS, :REF-KNOWN, or
;; :REF-TRANS here in this case. Instead, there's separate
;; DEFKNOWN/DEFINE-VOP/DEFTRANSFORM stuff in
:ref-trans %simple-fun-name
:set-known (unsafe)
:set-trans (setf %simple-fun-name))
- (arglist :ref-known (flushable)
+ (arglist :type list
+ :ref-known (flushable)
:ref-trans %simple-fun-arglist
:set-known (unsafe)
:set-trans (setf %simple-fun-arglist))
:ref-trans %simple-fun-type
:set-known (unsafe)
:set-trans (setf %simple-fun-type))
+ ;; the SB!C::DEBUG-FUN object corresponding to this object, or NIL for none
+ #+nil ; FIXME: doesn't work (gotcha, lowly maintenoid!) See notes on bug 137.
+ (debug-fun :ref-known (flushable)
+ :ref-trans %simple-fun-debug-fun
+ :set-known (unsafe)
+ :set-trans (setf %simple-fun-debug-fun))
(code :rest-p t :c-type "unsigned char"))
(define-primitive-object (return-pc :lowtag other-pointer-lowtag :widetag t)
:lowtag fun-pointer-lowtag
:widetag funcallable-instance-header-widetag
:alloc-trans %make-funcallable-instance)
- #!-x86
+ #!-(or x86 x86-64)
(fun
:ref-known (flushable) :ref-trans %funcallable-instance-fun
:set-known (unsafe) :set-trans (setf %funcallable-instance-fun))
- #!+x86
+ #!+(or x86 x86-64)
(fun
:ref-known (flushable) :ref-trans %funcallable-instance-fun
;; KLUDGE: There's no :SET-KNOWN or :SET-TRANS in this case.
(define-primitive-object (unwind-block)
(current-uwp :c-type #!-alpha "struct unwind_block *" #!+alpha "u32")
(current-cont :c-type #!-alpha "lispobj *" #!+alpha "u32")
- #!-x86 current-code
+ #!-(or x86 x86-64) current-code
entry-pc)
(define-primitive-object (catch-block)
(current-uwp :c-type #!-alpha "struct unwind_block *" #!+alpha "u32")
(current-cont :c-type #!-alpha "lispobj *" #!+alpha "u32")
- #!-x86 current-code
+ #!-(or x86 x86-64) current-code
entry-pc
tag
(previous-catch :c-type #!-alpha "struct catch_block *" #!+alpha "u32")
\f
;;;; symbols
-#!+x86
-(defknown symbol-hash (symbol) (integer 0 #.*target-most-positive-fixnum*)
- (flushable movable))
-
(define-primitive-object (symbol :lowtag other-pointer-lowtag
:widetag symbol-header-widetag
- #!-x86 :alloc-trans #!-x86 make-symbol)
- (value :set-trans %set-symbol-value
- :init :unbound)
- #!+x86 (hash)
+ :alloc-trans make-symbol)
+
+ ;; Beware when changing this definition. NIL-the-symbol is defined
+ ;; using this layout, and NIL-the-end-of-list-marker is the cons
+ ;; ( NIL . NIL ), living in the first two slots of NIL-the-symbol
+ ;; (conses have no header). Careful selection of lowtags ensures
+ ;; that the same pointer can be used for both purposes:
+ ;; OTHER-POINTER-LOWTAG is 7, LIST-POINTER-LOWTAG is 3, so if you
+ ;; subtract 3 from (SB-KERNEL:GET-LISP-OBJ-ADDRESS 'NIL) you get the
+ ;; first data slot, and if you subtract 7 you get a symbol header.
+
+ ;; also the CAR of NIL-as-end-of-list
+ (value :init :unbound :ref-known (flushable) :ref-trans symbol-global-value)
+ ;; also the CDR of NIL-as-end-of-list. Its reffer needs special
+ ;; care for this reason, as hash values must be fixnums.
+ (hash :set-trans %set-symbol-hash)
+
(plist :ref-trans symbol-plist
:set-trans %set-symbol-plist
:init :null)
(name :ref-trans symbol-name :init :arg)
(package :ref-trans symbol-package
:set-trans %set-symbol-package
- :init :null))
+ :init :null)
+ #!+sb-thread (tls-index :ref-known (flushable) :ref-trans symbol-tls-index))
(define-primitive-object (complex-single-float
:lowtag other-pointer-lowtag
(define-primitive-object (complex-double-float
:lowtag other-pointer-lowtag
:widetag complex-double-float-widetag)
- (filler)
- (real :c-type "double" :length 2)
- (imag :c-type "double" :length 2))
-
-#!+long-float
-(define-primitive-object (complex-long-float
- :lowtag other-pointer-lowtag
- :widetag complex-long-float-widetag)
- #!+sparc (filler)
- (real :c-type "long double" :length #!+x86 3 #!+sparc 4)
- (imag :c-type "long double" :length #!+x86 3 #!+sparc 4))
-
+ #!-x86-64 (filler)
+ (real :c-type "double" :length #!-x86-64 2 #!+x86-64 1)
+ (imag :c-type "double" :length #!-x86-64 2 #!+x86-64 1))
+
+;;; this isn't actually a lisp object at all, it's a c structure that lives
+;;; in c-land. However, we need sight of so many parts of it from Lisp that
+;;; it makes sense to define it here anyway, so that the GENESIS machinery
+;;; can take care of maintaining Lisp and C versions.
+;;; Hence the even-fixnum lowtag just so we don't get odd(sic) numbers
+;;; added to the slot offsets
+(define-primitive-object (thread :lowtag even-fixnum-lowtag)
+ ;; unbound_marker is borrowed very briefly at thread startup to
+ ;; pass the address of initial-function into new_thread_trampoline
+ (unbound-marker :init :unbound) ; tls[0] = UNBOUND_MARKER_WIDETAG
+ (pid :c-type "pid_t")
+ (binding-stack-start :c-type "lispobj *" :length #!+alpha 2 #!-alpha 1)
+ (binding-stack-pointer :c-type "lispobj *" :length #!+alpha 2 #!-alpha 1)
+ (control-stack-start :c-type "lispobj *" :length #!+alpha 2 #!-alpha 1)
+ (control-stack-end :c-type "lispobj *" :length #!+alpha 2 #!-alpha 1)
+ (alien-stack-start :c-type "lispobj *" :length #!+alpha 2 #!-alpha 1)
+ (alien-stack-pointer :c-type "lispobj *" :length #!+alpha 2 #!-alpha 1)
+ #!+gencgc (alloc-region :c-type "struct alloc_region" :length 5)
+ (tls-cookie) ; on x86, the LDT index
+ (this :c-type "struct thread *" :length #!+alpha 2 #!-alpha 1)
+ (next :c-type "struct thread *" :length #!+alpha 2 #!-alpha 1)
+ (state) ; running, stopping, stopped, dead
+ #!+(or x86 x86-64) (pseudo-atomic-atomic)
+ #!+(or x86 x86-64) (pseudo-atomic-interrupted)
+ (interrupt-data :c-type "struct interrupt_data *"
+ :length #!+alpha 2 #!-alpha 1)
+ (interrupt-contexts :c-type "os_context_t *" :rest-p t))
projects / sbcl.git / blobdiff