1 ;;;; cold initialization stuff, plus some other miscellaneous stuff
2 ;;;; that we don't have any better place for
4 ;;;; This software is part of the SBCL system. See the README file for
7 ;;;; This software is derived from the CMU CL system, which was
8 ;;;; written at Carnegie Mellon University and released into the
9 ;;;; public domain. The software is in the public domain and is
10 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
11 ;;;; files for more information.
13 (in-package "SB!IMPL")
15 ;;;; burning our ships behind us
17 ;;; There's a fair amount of machinery which is needed only at cold
18 ;;; init time, and should be discarded before freezing the final
19 ;;; system. We discard it by uninterning the associated symbols.
20 ;;; Rather than using a special table of symbols to be uninterned,
21 ;;; which might be tedious to maintain, instead we use a hack:
22 ;;; anything whose name matches a magic character pattern is
24 (defun !unintern-init-only-stuff ()
25 (do ((any-changes? nil nil))
27 (dolist (package (list-all-packages))
28 (do-symbols (symbol package)
29 (let ((name (symbol-name symbol)))
30 (when (or (string= name "!" :end1 1 :end2 1)
31 (and (>= (length name) 2)
32 (string= name "*!" :end1 2 :end2 2)))
33 (/show0 "uninterning cold-init-only symbol..")
34 #!+sb-show (%primitive print name)
35 (unintern symbol package)
36 (setf any-changes? t)))))
42 ;;; a list of toplevel things set by GENESIS
43 (defvar *!reversed-cold-toplevels*)
45 ;;; a SIMPLE-VECTOR set by genesis
46 (defvar *!load-time-values*)
49 (defun do-load-time-value-fixup (object offset index)
50 (declare (type index offset))
51 (macrolet ((lose (msg)
53 (%primitive print ,msg)
55 (let ((value (svref *!load-time-values* index)))
59 (0 (setf (car object) value))
60 (1 (setf (cdr object) value))
61 (t (lose "bogus offset in cons cell"))))
63 (setf (%instance-ref object (- offset sb!vm:instance-slots-offset))
66 (setf (code-header-ref object offset) value))
68 (setf (svref object (- offset sb!vm:vector-data-offset)) value))
70 (lose "unknown kind of object for load-time-value fixup"))))))
72 (eval-when (:compile-toplevel :execute)
73 ;; FIXME: Perhaps we should make SHOW-AND-CALL-AND-FMAKUNBOUND, too,
74 ;; and use it for most of the cold-init functions. (Just be careful
75 ;; not to use it for the COLD-INIT-OR-REINIT functions.)
76 (sb!xc:defmacro show-and-call (name)
78 #!+sb-show (%primitive print ,(symbol-name name))
81 ;;; called when a cold system starts up
83 #!+sb-doc "Give the world a shove and hope it spins."
85 (/show0 "entering !COLD-INIT")
87 ;; FIXME: It'd probably be cleaner to have most of the stuff here
88 ;; handled by calls a la !GC-COLD-INIT, !ERROR-COLD-INIT, and
89 ;; !UNIX-COLD-INIT. And *TYPE-SYSTEM-INITIALIZED* could be changed to
90 ;; *TYPE-SYSTEM-INITIALIZED-WHEN-BOUND* so that it doesn't need to
91 ;; be explicitly set in order to be meaningful.
92 (setf *gc-verbose* nil)
93 (setf *gc-notify-stream* nil)
94 (setf *before-gc-hooks* nil)
95 (setf *after-gc-hooks* nil)
96 #!+gengc (setf sb!conditions::*handler-clusters* nil)
97 #!-gengc (setf *already-maybe-gcing* t
99 *need-to-collect-garbage* nil
100 sb!unix::*interrupts-enabled* t
101 sb!unix::*interrupt-pending* nil)
102 (setf *break-on-signals* nil)
103 (setf *maximum-error-depth* 10)
104 (setf *current-error-depth* 0)
105 (setf *cold-init-complete-p* nil)
106 (setf *type-system-initialized* nil)
108 ;; Anyone might call RANDOM to initialize a hash value or something;
109 ;; and there's nothing which needs to be initialized in order for
110 ;; this to be initialized, so we initialize it right away.
111 (show-and-call !random-cold-init)
113 ;; All sorts of things need INFO and/or (SETF INFO).
114 (/show0 "about to SHOW-AND-CALL !GLOBALDB-COLD-INIT")
115 (show-and-call !globaldb-cold-init)
117 ;; This needs to be done early, but needs to be after INFO is
119 (show-and-call !fdefn-cold-init)
121 ;; Various toplevel forms call MAKE-ARRAY, which calls SUBTYPEP, so
122 ;; the basic type machinery needs to be initialized before toplevel
124 (show-and-call !type-class-cold-init)
125 (show-and-call !typedefs-cold-init)
126 (show-and-call !classes-cold-init)
127 (show-and-call !early-type-cold-init)
128 (show-and-call !late-type-cold-init)
129 (show-and-call !alien-type-cold-init)
130 (show-and-call !target-type-cold-init)
131 (show-and-call !vm-type-cold-init)
132 ;; FIXME: It would be tidy to make sure that that these cold init
133 ;; functions are called in the same relative order as the toplevel
134 ;; forms of the corresponding source files.
136 (show-and-call !package-cold-init)
138 ;; Set sane values for our toplevel forms.
139 (show-and-call !set-sane-cookie-defaults)
141 ;; KLUDGE: Why are fixups mixed up with toplevel forms? Couldn't
142 ;; fixups be done separately? Wouldn't that be clearer and better?
144 (/show0 "doing cold toplevel forms and fixups")
145 (/show0 "(LENGTH *!REVERSED-COLD-TOPLEVELS*)=..")
146 #!+sb-show (%primitive print
147 (sb!impl::hexstr (length *!reversed-cold-toplevels*)))
148 (let (#!+sb-show (index-in-cold-toplevels 0)
149 #!+sb-show (filename-in-cold-toplevels nil))
150 #!+sb-show (declare (type fixnum index-in-cold-toplevels))
151 (dolist (toplevel-thing (prog1
152 (nreverse *!reversed-cold-toplevels*)
153 ;; (Now that we've NREVERSEd it, it's
154 ;; somewhat scrambled, so keep anyone
155 ;; else from trying to get at it.)
156 (makunbound '*!reversed-cold-toplevels*)))
158 (when (zerop (mod index-in-cold-toplevels 1024))
159 (/show0 "INDEX-IN-COLD-TOPLEVELS=..")
160 (%primitive print (sb!impl::hexstr index-in-cold-toplevels)))
162 (setf index-in-cold-toplevels
163 (the fixnum (1+ index-in-cold-toplevels)))
164 (typecase toplevel-thing
166 (funcall toplevel-thing))
168 (case (first toplevel-thing)
170 (setf (svref *!load-time-values* (third toplevel-thing))
171 (funcall (second toplevel-thing))))
172 (:load-time-value-fixup
174 (setf (sap-ref-32 (second toplevel-thing) 0)
175 (get-lisp-obj-address
176 (svref *!load-time-values* (third toplevel-thing))))
178 (do-load-time-value-fixup (second toplevel-thing)
179 (third toplevel-thing)
180 (fourth toplevel-thing)))
182 (:load-time-code-fixup
183 (sb!vm::do-load-time-code-fixup (second toplevel-thing)
184 (third toplevel-thing)
185 (fourth toplevel-thing)
186 (fifth toplevel-thing)))
189 "bogus fixup code in *!REVERSED-COLD-TOPLEVELS*")
192 (%primitive print "bogus function in *!REVERSED-COLD-TOPLEVELS*")
194 (/show0 "done with loop over cold toplevel forms and fixups")
196 ;; Set sane values again, so that the user sees sane values instead of
197 ;; whatever is left over from the last DECLAIM.
198 (show-and-call !set-sane-cookie-defaults)
200 ;; Only do this after top level forms have run, 'cause that's where
202 (setf *type-system-initialized* t)
204 (show-and-call os-cold-init-or-reinit)
205 (show-and-call !filesys-cold-init)
207 (show-and-call stream-cold-init-or-reset)
208 (show-and-call !loader-cold-init)
209 (show-and-call signal-cold-init-or-reinit)
210 (setf (sb!alien:extern-alien "internal_errors_enabled" boolean) t)
212 ;; FIXME: This list of modes should be defined in one place and
213 ;; explicitly shared between here and REINIT.
214 (set-floating-point-modes :traps '(:overflow
219 (show-and-call !class-finalize)
221 ;; The reader and printer are initialized very late, so that they
222 ;; can even do hairy things like invoking the compiler as part of
223 ;; their initialization.
224 (show-and-call !reader-cold-init)
225 (let ((*readtable* *standard-readtable*))
226 (show-and-call !sharpm-cold-init)
227 (show-and-call !backq-cold-init))
228 (setf *readtable* (copy-readtable *standard-readtable*))
229 (setf sb!debug:*debug-readtable* (copy-readtable *standard-readtable*))
230 (sb!pretty:!pprint-cold-init)
232 ;; the ANSI-specified initial value of *PACKAGE*
233 (setf *package* (find-package "COMMON-LISP-USER"))
234 ;; FIXME: I'm not sure where it should be done, but CL-USER really
235 ;; ought to USE-PACKAGE publicly accessible packages like SB-DEBUG
236 ;; (for ARG and VAR), SB-EXT, SB-EXT-C-CALL, and SB-EXT-ALIEN so
237 ;; that the user has a hint about which symbols we consider public.
238 ;; (Perhaps SB-DEBUG wouldn't need to be in the list if ARG and VAR
239 ;; could be typed directly, with no parentheses, at the debug prompt
240 ;; the way that e.g. F or BACKTRACE can be?)
242 (/show0 "done initializing")
243 (setf *cold-init-complete-p* t)
245 ;; Unintern no-longer-needed stuff before we GC.
247 (!unintern-init-only-stuff)
249 ;; The system is finally ready for GC.
250 #!-gengc (setf *already-maybe-gcing* nil)
251 (/show0 "enabling GC")
253 (/show0 "doing first GC")
255 (/show0 "back from first GC")
259 (/show0 "going into toplevel loop")
260 (handling-end-of-the-world
263 (defun quit (&key recklessly-p
264 (unix-code 0 unix-code-p)
265 (unix-status unix-code))
267 "Terminate the current Lisp. Things are cleaned up (with UNWIND-PROTECT
268 and so forth) unless RECKLESSLY-P is non-NIL. On UNIX-like systems,
269 UNIX-STATUS is used as the status code."
270 (declare (type (signed-byte 32) unix-code))
271 ;; TO DO: UNIX-CODE was deprecated in sbcl-0.6.8, after having been
272 ;; around for less than a year. It should be safe to remove it after
275 (warn "The UNIX-CODE argument is deprecated. Use the UNIX-STATUS argument
276 instead (which is another name for the same thing)."))
278 (sb!unix:unix-exit unix-status)
279 (throw '%end-of-the-world unix-status)))
281 ;;;; initialization functions
286 (os-cold-init-or-reinit)
288 (signal-cold-init-or-reinit)
289 (gc-cold-init-or-reinit)
290 (setf (sb!alien:extern-alien "internal_errors_enabled" boolean) t)
291 (set-floating-point-modes :traps
292 ;; PRINT seems to not like x86 NPX denormal
293 ;; floats like LEAST-NEGATIVE-SINGLE-FLOAT, so
294 ;; the :UNDERFLOW exceptions are disabled by
295 ;; default. Joe User can explicitly enable them
297 '(:overflow #!-x86 :underflow :invalid
299 ;; Clear pseudo atomic in case this core wasn't compiled with
302 ;; FIXME: In SBCL our cores are always compiled with support. So
303 ;; we don't need to do this, do we? At least not for this
304 ;; reason.. (Perhaps we should do it anyway in case someone
305 ;; manages to save an image from within a pseudo-atomic-atomic
307 #!+x86 (setf sb!impl::*pseudo-atomic-atomic* 0))
310 ;;;; some support for any hapless wretches who end up debugging cold
313 ;;; Decode THING into hex using only machinery available early in cold
316 (defun hexstr (thing)
317 (let ((addr (sb!kernel:get-lisp-obj-address thing))
318 (str (make-string 10)))
319 (setf (char str 0) #\0
322 (let* ((nibble (ldb (byte 4 0) addr))
323 (chr (char "0123456789abcdef" nibble)))
324 (declare (type (unsigned-byte 4) nibble)
326 (setf (char str (- 9 i)) chr
327 addr (ash addr -4))))
331 (defun cold-print (x)
333 (simple-string (sb!sys:%primitive print x))
334 (symbol (sb!sys:%primitive print (symbol-name x)))
335 (list (let ((count 0))
336 (sb!sys:%primitive print "list:")
338 (when (>= (incf count) 4)
339 (sb!sys:%primitive print "...")
342 (t (sb!sys:%primitive print (hexstr x)))))