X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fgeneric%2Fobjdef.lisp;h=57a4831ea4aaf893f9fcba744c25e46fdc1d3a2b;hb=7646aefa188758e2892fea2ad02be4f29b3938f2;hp=a4989d550fd34974f4750bbf522baf59681de5c5;hpb=3c65762b927af861c9c8bc416e4cbac9a14ec0c3;p=sbcl.git diff --git a/src/compiler/generic/objdef.lisp b/src/compiler/generic/objdef.lisp index a4989d5..57a4831 100644 --- a/src/compiler/generic/objdef.lisp +++ b/src/compiler/generic/objdef.lisp @@ -10,6 +10,31 @@ ;;;; 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 ;;;; the primitive objects themselves @@ -19,18 +44,18 @@ (cdr :ref-trans cdr :set-trans sb!c::%rplacd :init :arg)) (define-primitive-object (instance :lowtag instance-pointer-lowtag - :header instance-header-widetag + :widetag instance-header-widetag :alloc-trans %make-instance) (slots :rest-p t)) (define-primitive-object (bignum :lowtag other-pointer-lowtag - :header bignum-widetag + :widetag bignum-widetag :alloc-trans sb!bignum::%allocate-bignum) (digits :rest-p t :c-type #!-alpha "long" #!+alpha "u32")) (define-primitive-object (ratio :type ratio :lowtag other-pointer-lowtag - :header ratio-widetag + :widetag ratio-widetag :alloc-trans %make-ratio) (numerator :type integer :ref-known (flushable movable) @@ -42,23 +67,23 @@ :init :arg)) (define-primitive-object (single-float :lowtag other-pointer-lowtag - :header single-float-widetag) + :widetag single-float-widetag) (value :c-type "float")) (define-primitive-object (double-float :lowtag other-pointer-lowtag - :header double-float-widetag) + :widetag double-float-widetag) (filler) (value :c-type "double" :length 2)) #!+long-float (define-primitive-object (long-float :lowtag other-pointer-lowtag - :header long-float-widetag) + :widetag long-float-widetag) #!+sparc (filler) (value :c-type "long double" :length #!+x86 3 #!+sparc 4)) (define-primitive-object (complex :type complex :lowtag other-pointer-lowtag - :header complex-widetag + :widetag complex-widetag :alloc-trans %make-complex) (real :type real :ref-known (flushable movable) @@ -70,7 +95,9 @@ :init :arg)) (define-primitive-object (array :lowtag other-pointer-lowtag - :header t) + :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) @@ -105,14 +132,16 @@ (define-primitive-object (vector :type vector :lowtag other-pointer-lowtag - :header t) + :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 (code :type code-component :lowtag other-pointer-lowtag - :header t) + :widetag t) (code-size :type index :ref-known (flushable movable) :ref-trans %code-code-size) @@ -131,7 +160,7 @@ (define-primitive-object (fdefn :type fdefn :lowtag other-pointer-lowtag - :header fdefn-widetag) + :widetag fdefn-widetag) (name :ref-trans fdefn-name) (fun :type (or function null) :ref-trans fdefn-fun) (raw-addr :c-type #!-alpha "char *" #!+alpha "u32")) @@ -140,7 +169,7 @@ ;;; which are also subtypes of Common Lisp's FUNCTION type) (define-primitive-object (simple-fun :type function :lowtag fun-pointer-lowtag - :header simple-fun-header-widetag) + :widetag simple-fun-header-widetag) #!-x86 (self :ref-trans %simple-fun-self :set-trans (setf %simple-fun-self)) #!+x86 (self @@ -168,7 +197,8 @@ :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)) @@ -176,19 +206,25 @@ :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 :header t) +(define-primitive-object (return-pc :lowtag other-pointer-lowtag :widetag t) (return-point :c-type "unsigned char" :rest-p t)) (define-primitive-object (closure :lowtag fun-pointer-lowtag - :header closure-header-widetag) + :widetag closure-header-widetag) (fun :init :arg :ref-trans %closure-fun) (info :rest-p t)) (define-primitive-object (funcallable-instance :lowtag fun-pointer-lowtag - :header funcallable-instance-header-widetag + :widetag funcallable-instance-header-widetag :alloc-trans %make-funcallable-instance) #!-x86 (fun @@ -219,7 +255,7 @@ (info :rest-p t)) (define-primitive-object (value-cell :lowtag other-pointer-lowtag - :header value-cell-header-widetag + :widetag value-cell-header-widetag :alloc-trans make-value-cell) (value :set-trans value-cell-set :set-known (unsafe) @@ -229,19 +265,19 @@ #!+alpha (define-primitive-object (sap :lowtag other-pointer-lowtag - :header sap-widetag) + :widetag sap-widetag) (padding) (pointer :c-type "char *" :length 2)) #!-alpha (define-primitive-object (sap :lowtag other-pointer-lowtag - :header sap-widetag) + :widetag sap-widetag) (pointer :c-type "char *")) (define-primitive-object (weak-pointer :type weak-pointer :lowtag other-pointer-lowtag - :header weak-pointer-widetag + :widetag weak-pointer-widetag :alloc-trans make-weak-pointer) (value :ref-trans sb!c::%weak-pointer-value :ref-known (flushable) :init :arg) @@ -273,46 +309,76 @@ ;;; (For an explanation of this, see the comments at the definition of ;;; KLUDGE-NONDETERMINISTIC-CATCH-BLOCK-SIZE.) -(aver (= sb!vm::kludge-nondeterministic-catch-block-size catch-block-size)) +(aver (= kludge-nondeterministic-catch-block-size catch-block-size)) ;;;; symbols #!+x86 -(defknown symbol-hash (symbol) (integer 0 #.*target-most-positive-fixnum*) +(defknown symbol-hash (symbol) (integer 0 #.sb!xc:most-positive-fixnum) (flushable movable)) (define-primitive-object (symbol :lowtag other-pointer-lowtag - :header symbol-header-widetag + :widetag symbol-header-widetag #!-x86 :alloc-trans #!-x86 make-symbol) - (value :set-trans %set-symbol-value - :init :unbound) - #!+x86 (hash) + + ;; 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. + + (value :init :unbound) ;also the CAR of NIL-as-end-of-list + (hash) ;the CDR of NIL-as-end-of-list + (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)) (define-primitive-object (complex-single-float :lowtag other-pointer-lowtag - :header complex-single-float-widetag) + :widetag complex-single-float-widetag) (real :c-type "float") (imag :c-type "float")) (define-primitive-object (complex-double-float :lowtag other-pointer-lowtag - :header complex-double-float-widetag) + :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 - :header 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)) - +;;; 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 + #!+x86 (pseudo-atomic-atomic) + #!+x86 (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))