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cold-init.lisp    341 lines (297 with data), 12.4 kB

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;;;; cold initialization stuff, plus some other miscellaneous stuff
;;;; that we don't have any better place for
;;;; This software is part of the SBCL system. See the README file for
;;;; more information.
;;;;
;;;; This software is derived from the CMU CL system, which was
;;;; written at Carnegie Mellon University and released into the
;;;; public domain. The software is in the public domain and is
;;;; provided with absolutely no warranty. See the COPYING and CREDITS
;;;; files for more information.
(in-package "SB!IMPL")
;;;; burning our ships behind us
;;; There's a fair amount of machinery which is needed only at cold
;;; init time, and should be discarded before freezing the final
;;; system. We discard it by uninterning the associated symbols.
;;; Rather than using a special table of symbols to be uninterned,
;;; which might be tedious to maintain, instead we use a hack:
;;; anything whose name matches a magic character pattern is
;;; uninterned.
;;;
;;; FIXME: Are there other tables that need to have entries removed?
;;; What about symbols of the form DEF!FOO?
(defun !unintern-init-only-stuff ()
(do ((any-changes? nil nil))
(nil)
(dolist (package (list-all-packages))
(do-symbols (symbol package)
(let ((name (symbol-name symbol)))
(when (or (string= name "!" :end1 1 :end2 1)
(and (>= (length name) 2)
(string= name "*!" :end1 2 :end2 2)))
(/show0 "uninterning cold-init-only symbol..")
(/primitive-print name)
;; FIXME: Is this (FIRST (LAST *INFO-ENVIRONMENT*)) really
;; meant to be an idiom to use? Is there a more obvious
;; name for this? [e.g. (GLOBAL-ENVIRONMENT)?]
(do-info ((first (last *info-environment*))
:name entry :class class :type type)
(when (eq entry symbol)
(clear-info class type entry)))
(unintern symbol package)
(setf any-changes? t)))))
(unless any-changes?
(return))))
;;;; putting ourselves out of our misery when things become too much to bear
(declaim (ftype (function (simple-string) nil) !cold-lose))
(defun !cold-lose (msg)
(%primitive print msg)
(%primitive print "too early in cold init to recover from errors")
(%halt))
;;; last-ditch error reporting for things which should never happen
;;; and which, if they do happen, are sufficiently likely to torpedo
;;; the normal error-handling system that we want to bypass it
(declaim (ftype (function (simple-string) nil) critically-unreachable))
(defun critically-unreachable (where)
(%primitive print "internal error: Control should never reach here, i.e.")
(%primitive print where)
(%halt))
;;;; !COLD-INIT
;;; a list of toplevel things set by GENESIS
(defvar *!reversed-cold-toplevels*)
;;; a SIMPLE-VECTOR set by GENESIS
(defvar *!load-time-values*)
(eval-when (:compile-toplevel :execute)
;; FIXME: Perhaps we should make SHOW-AND-CALL-AND-FMAKUNBOUND, too,
;; and use it for most of the cold-init functions. (Just be careful
;; not to use it for the COLD-INIT-OR-REINIT functions.)
(sb!xc:defmacro show-and-call (name)
`(progn
(/primitive-print ,(symbol-name name))
(,name))))
;;; called when a cold system starts up
(defun !cold-init ()
#!+sb-doc "Give the world a shove and hope it spins."
(/show0 "entering !COLD-INIT")
;; FIXME: It'd probably be cleaner to have most of the stuff here
;; handled by calls like !GC-COLD-INIT, !ERROR-COLD-INIT, and
;; !UNIX-COLD-INIT. And *TYPE-SYSTEM-INITIALIZED* could be changed to
;; *TYPE-SYSTEM-INITIALIZED-WHEN-BOUND* so that it doesn't need to
;; be explicitly set in order to be meaningful.
(setf *before-gc-hooks* nil
*after-gc-hooks* nil
*gc-inhibit* 1
*need-to-collect-garbage* nil
sb!unix::*interrupts-enabled* t
sb!unix::*interrupt-pending* nil
*break-on-signals* nil
*maximum-error-depth* 10
*current-error-depth* 0
*cold-init-complete-p* nil
*type-system-initialized* nil)
(show-and-call !typecheckfuns-cold-init)
;; Anyone might call RANDOM to initialize a hash value or something;
;; and there's nothing which needs to be initialized in order for
;; this to be initialized, so we initialize it right away.
(show-and-call !random-cold-init)
(show-and-call !package-cold-init)
;; All sorts of things need INFO and/or (SETF INFO).
(/show0 "about to SHOW-AND-CALL !GLOBALDB-COLD-INIT")
(show-and-call !globaldb-cold-init)
;; This needs to be done early, but needs to be after INFO is
;; initialized.
(show-and-call !function-names-cold-init)
(show-and-call !fdefn-cold-init)
;; Various toplevel forms call MAKE-ARRAY, which calls SUBTYPEP, so
;; the basic type machinery needs to be initialized before toplevel
;; forms run.
(show-and-call !type-class-cold-init)
(show-and-call !typedefs-cold-init)
(show-and-call !classes-cold-init)
(show-and-call !early-type-cold-init)
(show-and-call !late-type-cold-init)
(show-and-call !alien-type-cold-init)
(show-and-call !target-type-cold-init)
(show-and-call !vm-type-cold-init)
;; FIXME: It would be tidy to make sure that that these cold init
;; functions are called in the same relative order as the toplevel
;; forms of the corresponding source files.
;;(show-and-call !package-cold-init)
(show-and-call !policy-cold-init-or-resanify)
(/show0 "back from !POLICY-COLD-INIT-OR-RESANIFY")
(show-and-call !early-proclaim-cold-init)
;; KLUDGE: Why are fixups mixed up with toplevel forms? Couldn't
;; fixups be done separately? Wouldn't that be clearer and better?
;; -- WHN 19991204
(/show0 "doing cold toplevel forms and fixups")
(/show0 "(LISTP *!REVERSED-COLD-TOPLEVELS*)=..")
(/hexstr (if (listp *!reversed-cold-toplevels*) "true" "NIL"))
(/show0 "about to calculate (LENGTH *!REVERSED-COLD-TOPLEVELS*)")
(/show0 "(LENGTH *!REVERSED-COLD-TOPLEVELS*)=..")
#!+sb-show (let ((r-c-tl-length (length *!reversed-cold-toplevels*)))
(/show0 "(length calculated..)")
(let ((hexstr (hexstr r-c-tl-length)))
(/show0 "(hexstr calculated..)")
(/primitive-print hexstr)))
(let (#!+sb-show (index-in-cold-toplevels 0))
#!+sb-show (declare (type fixnum index-in-cold-toplevels))
(dolist (toplevel-thing (prog1
(nreverse *!reversed-cold-toplevels*)
;; (Now that we've NREVERSEd it, it's
;; somewhat scrambled, so keep anyone
;; else from trying to get at it.)
(makunbound '*!reversed-cold-toplevels*)))
#!+sb-show
(when (zerop (mod index-in-cold-toplevels 1024))
(/show0 "INDEX-IN-COLD-TOPLEVELS=..")
(/hexstr index-in-cold-toplevels))
#!+sb-show
(setf index-in-cold-toplevels
(the fixnum (1+ index-in-cold-toplevels)))
(typecase toplevel-thing
(function
(funcall toplevel-thing))
(cons
(case (first toplevel-thing)
(:load-time-value
(setf (svref *!load-time-values* (third toplevel-thing))
(funcall (second toplevel-thing))))
(:load-time-value-fixup
(setf (sap-ref-32 (second toplevel-thing) 0)
(get-lisp-obj-address
(svref *!load-time-values* (third toplevel-thing)))))
#!+(and x86 gencgc)
(:load-time-code-fixup
(sb!vm::!envector-load-time-code-fixup (second toplevel-thing)
(third toplevel-thing)
(fourth toplevel-thing)
(fifth toplevel-thing)))
(t
(!cold-lose "bogus fixup code in *!REVERSED-COLD-TOPLEVELS*"))))
(t (!cold-lose "bogus function in *!REVERSED-COLD-TOPLEVELS*")))))
(/show0 "done with loop over cold toplevel forms and fixups")
;; Set sane values again, so that the user sees sane values instead
;; of whatever is left over from the last DECLAIM/PROCLAIM.
(show-and-call !policy-cold-init-or-resanify)
;; Only do this after toplevel forms have run, 'cause that's where
;; DEFTYPEs are.
(setf *type-system-initialized* t)
;; now that the type system is definitely initialized, fixup UNKNOWN
;; types that have crept in.
(show-and-call !fixup-type-cold-init)
;; run the PROCLAIMs.
(show-and-call !late-proclaim-cold-init)
(show-and-call os-cold-init-or-reinit)
(show-and-call stream-cold-init-or-reset)
(show-and-call !loader-cold-init)
(show-and-call signal-cold-init-or-reinit)
(setf (sb!alien:extern-alien "internal_errors_enabled" boolean) t)
;; FIXME: This list of modes should be defined in one place and
;; explicitly shared between here and REINIT.
;; FIXME: For some unknown reason, NetBSD/x86 won't run with the
;; :invalid trap enabled. That should be fixed, but not today...
;; PEM -- April 5, 2004
(set-floating-point-modes
:traps '(:overflow #!-netbsd :invalid :divide-by-zero))
(show-and-call !class-finalize)
;; The reader and printer are initialized very late, so that they
;; can do hairy things like invoking the compiler as part of their
;; initialization.
(show-and-call !reader-cold-init)
(let ((*readtable* *standard-readtable*))
(show-and-call !sharpm-cold-init)
(show-and-call !backq-cold-init))
(setf *readtable* (copy-readtable *standard-readtable*))
(setf sb!debug:*debug-readtable* (copy-readtable *standard-readtable*))
(sb!pretty:!pprint-cold-init)
;; the ANSI-specified initial value of *PACKAGE*
(setf *package* (find-package "COMMON-LISP-USER"))
(/show0 "done initializing, setting *COLD-INIT-COMPLETE-P*")
(setf *cold-init-complete-p* t)
;; The system is finally ready for GC.
(/show0 "enabling GC")
(gc-on)
(/show0 "doing first GC")
(gc :full t)
(/show0 "back from first GC")
;; The show is on.
(terpri)
(/show0 "going into toplevel loop")
(handling-end-of-the-world
(toplevel-init)
(critically-unreachable "after TOPLEVEL-INIT")))
(defun quit (&key recklessly-p
(unix-code 0 unix-code-p)
(unix-status unix-code))
#!+sb-doc
"Terminate the current Lisp. Things are cleaned up (with UNWIND-PROTECT
and so forth) unless RECKLESSLY-P is non-NIL. On UNIX-like systems,
UNIX-STATUS is used as the status code."
(declare (type (signed-byte 32) unix-status unix-code))
(/show0 "entering QUIT")
;; FIXME: UNIX-CODE was deprecated in sbcl-0.6.8, after having been
;; around for less than a year. It should be safe to remove it after
;; a year.
(when unix-code-p
(warn "The UNIX-CODE argument is deprecated. Use the UNIX-STATUS argument
instead (which is another name for the same thing)."))
(if recklessly-p
(sb!unix:unix-exit unix-status)
(throw '%end-of-the-world unix-status))
(critically-unreachable "after trying to die in QUIT"))
;;;; initialization functions
(defun reinit ()
(without-interrupts
(without-gcing
(os-cold-init-or-reinit)
(stream-reinit)
(signal-cold-init-or-reinit)
(setf (sb!alien:extern-alien "internal_errors_enabled" boolean) t)
;; PRINT seems not to like x86 NPX denormal floats like
;; LEAST-NEGATIVE-SINGLE-FLOAT, so the :UNDERFLOW exceptions are
;; disabled by default. Joe User can explicitly enable them if
;; desired.
;;
;; see also comment at the previous SET-FLOATING-POINT-MODES
;; call site.
(set-floating-point-modes
:traps '(:overflow #!-netbsd :invalid :divide-by-zero))
(sb!thread::maybe-install-futex-functions)))
(gc-on)
(gc))
;;;; some support for any hapless wretches who end up debugging cold
;;;; init code
;;; Decode THING into hexadecimal notation using only machinery
;;; available early in cold init.
#!+sb-show
(defun hexstr (thing)
(/noshow0 "entering HEXSTR")
(let ((addr (get-lisp-obj-address thing))
(str (make-string 10)))
(/noshow0 "ADDR and STR calculated")
(setf (char str 0) #\0
(char str 1) #\x)
(/noshow0 "CHARs 0 and 1 set")
(dotimes (i 8)
(/noshow0 "at head of DOTIMES loop")
(let* ((nibble (ldb (byte 4 0) addr))
(chr (char "0123456789abcdef" nibble)))
(declare (type (unsigned-byte 4) nibble)
(base-char chr))
(/noshow0 "NIBBLE and CHR calculated")
(setf (char str (- 9 i)) chr
addr (ash addr -4))))
str))
#!+sb-show
(defun cold-print (x)
(typecase x
(simple-string (sb!sys:%primitive print x))
(symbol (sb!sys:%primitive print (symbol-name x)))
(list (let ((count 0))
(sb!sys:%primitive print "list:")
(dolist (i x)
(when (>= (incf count) 4)
(sb!sys:%primitive print "...")
(return))
(cold-print i))))
(t (sb!sys:%primitive print (hexstr x)))))