Commit | Line | Data |
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a6029b97 | 1 | /* Copyright (C) 2001, 2009, 2010 Free Software Foundation, Inc. |
a98cef7e | 2 | * |
560b9c25 | 3 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
4 | * modify it under the terms of the GNU Lesser General Public License |
5 | * as published by the Free Software Foundation; either version 3 of | |
6 | * the License, or (at your option) any later version. | |
a98cef7e | 7 | * |
53befeb7 NJ |
8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
560b9c25 AW |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
a98cef7e | 12 | * |
560b9c25 AW |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
560b9c25 | 17 | */ |
a98cef7e | 18 | |
13c47753 AW |
19 | #if HAVE_CONFIG_H |
20 | # include <config.h> | |
21 | #endif | |
22 | ||
da8b4747 | 23 | #include <stdlib.h> |
6d14383e | 24 | #include <alloca.h> |
17e90c5e | 25 | #include <string.h> |
e3eb628d | 26 | |
1c44468d | 27 | #include "libguile/bdw-gc.h" |
e3eb628d LC |
28 | #include <gc/gc_mark.h> |
29 | ||
560b9c25 | 30 | #include "_scm.h" |
adaf86ec | 31 | #include "control.h" |
ac99cb0c | 32 | #include "frames.h" |
17e90c5e | 33 | #include "instructions.h" |
8f5cfc81 | 34 | #include "objcodes.h" |
ac99cb0c | 35 | #include "programs.h" |
fb10a008 | 36 | #include "lang.h" /* NULL_OR_NIL_P */ |
a98cef7e KN |
37 | #include "vm.h" |
38 | ||
a98cef7e KN |
39 | /* I sometimes use this for debugging. */ |
40 | #define vm_puts(OBJ) \ | |
41 | { \ | |
22bcbe8c AW |
42 | scm_display (OBJ, scm_current_error_port ()); \ |
43 | scm_newline (scm_current_error_port ()); \ | |
a98cef7e KN |
44 | } |
45 | ||
11ea1aba AW |
46 | /* The VM has a number of internal assertions that shouldn't normally be |
47 | necessary, but might be if you think you found a bug in the VM. */ | |
48 | #define VM_ENABLE_ASSERTIONS | |
49 | ||
50 | /* We can add a mode that ensures that all stack items above the stack pointer | |
51 | are NULL. This is useful for checking the internal consistency of the VM's | |
52 | assumptions and its operators, but isn't necessary for normal operation. It | |
616167fc | 53 | will ensure that assertions are enabled. Slows down the VM by about 30%. */ |
747a1635 | 54 | /* NB! If you enable this, search for NULLING in throw.c */ |
616167fc | 55 | /* #define VM_ENABLE_STACK_NULLING */ |
11ea1aba | 56 | |
53e28ed9 AW |
57 | /* #define VM_ENABLE_PARANOID_ASSERTIONS */ |
58 | ||
11ea1aba AW |
59 | #if defined (VM_ENABLE_STACK_NULLING) && !defined (VM_ENABLE_ASSERTIONS) |
60 | #define VM_ENABLE_ASSERTIONS | |
61 | #endif | |
62 | ||
e3eb628d LC |
63 | /* When defined, arrange so that the GC doesn't scan the VM stack beyond its |
64 | current SP. This should help avoid excess data retention. See | |
65 | http://thread.gmane.org/gmane.comp.programming.garbage-collection.boehmgc/3001 | |
66 | for a discussion. */ | |
67 | #define VM_ENABLE_PRECISE_STACK_GC_SCAN | |
68 | ||
69 | ||
a98cef7e | 70 | \f |
a98cef7e KN |
71 | /* |
72 | * VM Continuation | |
73 | */ | |
74 | ||
6f3b0cc2 AW |
75 | void |
76 | scm_i_vm_cont_print (SCM x, SCM port, scm_print_state *pstate) | |
77 | { | |
78 | scm_puts ("#<vm-continuation ", port); | |
79 | scm_uintprint (SCM_UNPACK (x), 16, port); | |
80 | scm_puts (">", port); | |
81 | } | |
17e90c5e | 82 | |
d8873dfe AW |
83 | /* In theory, a number of vm instances can be active in the call trace, and we |
84 | only want to reify the continuations of those in the current continuation | |
85 | root. I don't see a nice way to do this -- ideally it would involve dynwinds, | |
86 | and previous values of the *the-vm* fluid within the current continuation | |
87 | root. But we don't have access to continuation roots in the dynwind stack. | |
88 | So, just punt for now, we just capture the continuation for the current VM. | |
89 | ||
90 | While I'm on the topic, ideally we could avoid copying the C stack if the | |
91 | continuation root is inside VM code, and call/cc was invoked within that same | |
92 | call to vm_run; but that's currently not implemented. | |
93 | */ | |
cee1d22c AW |
94 | SCM |
95 | scm_i_vm_capture_stack (SCM *stack_base, SCM *fp, SCM *sp, scm_t_uint8 *ra, | |
96 | scm_t_uint8 *mvra, scm_t_uint32 flags) | |
a98cef7e | 97 | { |
d8873dfe AW |
98 | struct scm_vm_cont *p; |
99 | ||
100 | p = scm_gc_malloc (sizeof (*p), "capture_vm_cont"); | |
101 | p->stack_size = sp - stack_base + 1; | |
d8eeb67c LC |
102 | p->stack_base = scm_gc_malloc (p->stack_size * sizeof (SCM), |
103 | "capture_vm_cont"); | |
d8873dfe AW |
104 | #if defined(VM_ENABLE_STACK_NULLING) && 0 |
105 | /* Tail continuations leave their frame on the stack for subsequent | |
106 | application, but don't capture the frame -- so there are some elements on | |
107 | the stack then, and this check doesn't work, so disable it for now. */ | |
108 | if (sp >= vp->stack_base) | |
66db076a AW |
109 | if (!vp->sp[0] || vp->sp[1]) |
110 | abort (); | |
11ea1aba AW |
111 | memset (p->stack_base, 0, p->stack_size * sizeof (SCM)); |
112 | #endif | |
d8873dfe AW |
113 | p->ra = ra; |
114 | p->mvra = mvra; | |
115 | p->sp = sp; | |
116 | p->fp = fp; | |
117 | memcpy (p->stack_base, stack_base, (sp + 1 - stack_base) * sizeof (SCM)); | |
118 | p->reloc = p->stack_base - stack_base; | |
cee1d22c | 119 | p->flags = flags; |
6f3b0cc2 | 120 | return scm_cell (scm_tc7_vm_cont, (scm_t_bits)p); |
a98cef7e KN |
121 | } |
122 | ||
123 | static void | |
d8873dfe | 124 | vm_return_to_continuation (SCM vm, SCM cont, size_t n, SCM *argv) |
a98cef7e | 125 | { |
d8873dfe AW |
126 | struct scm_vm *vp; |
127 | struct scm_vm_cont *cp; | |
128 | SCM *argv_copy; | |
129 | ||
130 | argv_copy = alloca (n * sizeof(SCM)); | |
131 | memcpy (argv_copy, argv, n * sizeof(SCM)); | |
132 | ||
133 | vp = SCM_VM_DATA (vm); | |
134 | cp = SCM_VM_CONT_DATA (cont); | |
135 | ||
136 | if (n == 0 && !cp->mvra) | |
137 | scm_misc_error (NULL, "Too few values returned to continuation", | |
138 | SCM_EOL); | |
139 | ||
140 | if (vp->stack_size < cp->stack_size + n + 1) | |
a98cef7e | 141 | { |
17e90c5e | 142 | /* puts ("FIXME: Need to expand"); */ |
a98cef7e KN |
143 | abort (); |
144 | } | |
11ea1aba AW |
145 | #ifdef VM_ENABLE_STACK_NULLING |
146 | { | |
d8873dfe | 147 | scm_t_ptrdiff nzero = (vp->sp - cp->sp); |
11ea1aba | 148 | if (nzero > 0) |
d8873dfe | 149 | memset (vp->stack_base + cp->stack_size, 0, nzero * sizeof (SCM)); |
66db076a AW |
150 | /* actually nzero should always be negative, because vm_reset_stack will |
151 | unwind the stack to some point *below* this continuation */ | |
11ea1aba AW |
152 | } |
153 | #endif | |
d8873dfe AW |
154 | vp->sp = cp->sp; |
155 | vp->fp = cp->fp; | |
156 | memcpy (vp->stack_base, cp->stack_base, cp->stack_size * sizeof (SCM)); | |
bfffd258 | 157 | |
d8873dfe AW |
158 | if (n == 1 || !cp->mvra) |
159 | { | |
160 | vp->ip = cp->ra; | |
161 | vp->sp++; | |
162 | *vp->sp = argv_copy[0]; | |
163 | } | |
164 | else | |
165 | { | |
166 | size_t i; | |
167 | for (i = 0; i < n; i++) | |
168 | { | |
169 | vp->sp++; | |
170 | *vp->sp = argv_copy[i]; | |
171 | } | |
172 | vp->sp++; | |
173 | *vp->sp = scm_from_size_t (n); | |
174 | vp->ip = cp->mvra; | |
175 | } | |
176 | } | |
bfffd258 | 177 | |
bfffd258 | 178 | SCM |
269479e3 | 179 | scm_i_vm_capture_continuation (SCM vm) |
bfffd258 | 180 | { |
d8873dfe | 181 | struct scm_vm *vp = SCM_VM_DATA (vm); |
cee1d22c | 182 | return scm_i_vm_capture_stack (vp->stack_base, vp->fp, vp->sp, vp->ip, NULL, 0); |
a98cef7e KN |
183 | } |
184 | ||
b1b942b7 | 185 | static void |
7656f194 | 186 | vm_dispatch_hook (SCM vm, int hook_num) |
b1b942b7 | 187 | { |
7656f194 AW |
188 | struct scm_vm *vp; |
189 | SCM hook; | |
190 | SCM frame; | |
b1b942b7 | 191 | |
7656f194 AW |
192 | vp = SCM_VM_DATA (vm); |
193 | hook = vp->hooks[hook_num]; | |
b1b942b7 | 194 | |
7656f194 AW |
195 | if (SCM_LIKELY (scm_is_false (hook)) |
196 | || scm_is_null (SCM_HOOK_PROCEDURES (hook))) | |
197 | return; | |
198 | ||
199 | vp->trace_level--; | |
200 | frame = scm_c_make_frame (vm, vp->fp, vp->sp, vp->ip, 0); | |
201 | scm_c_run_hookn (hook, &frame, 1); | |
202 | vp->trace_level++; | |
b1b942b7 AW |
203 | } |
204 | ||
cee1d22c | 205 | static void vm_abort (SCM vm, size_t n, scm_t_int64 cookie) SCM_NORETURN; |
4f66bcde | 206 | static void |
cee1d22c | 207 | vm_abort (SCM vm, size_t n, scm_t_int64 vm_cookie) |
4f66bcde | 208 | { |
eaefabee | 209 | size_t i; |
2d026f04 AW |
210 | ssize_t tail_len; |
211 | SCM tag, tail, *argv; | |
eaefabee | 212 | |
2d026f04 AW |
213 | /* FIXME: VM_ENABLE_STACK_NULLING */ |
214 | tail = *(SCM_VM_DATA (vm)->sp--); | |
215 | /* NULLSTACK (1) */ | |
216 | tail_len = scm_ilength (tail); | |
217 | if (tail_len < 0) | |
218 | abort (); | |
eaefabee | 219 | tag = SCM_VM_DATA (vm)->sp[-n]; |
2d026f04 | 220 | argv = alloca ((n + tail_len) * sizeof (SCM)); |
eaefabee AW |
221 | for (i = 0; i < n; i++) |
222 | argv[i] = SCM_VM_DATA (vm)->sp[-(n-1-i)]; | |
2d026f04 AW |
223 | for (; i < n + tail_len; i++, tail = scm_cdr (tail)) |
224 | argv[i] = scm_car (tail); | |
225 | /* NULLSTACK (n + 1) */ | |
eaefabee AW |
226 | SCM_VM_DATA (vm)->sp -= n + 1; |
227 | ||
cee1d22c AW |
228 | scm_c_abort (vm, tag, n + tail_len, argv, vm_cookie); |
229 | } | |
230 | ||
231 | static void | |
07801437 | 232 | vm_reinstate_partial_continuation (SCM vm, SCM cont, SCM intwinds, |
9a1c6f1f | 233 | size_t n, SCM *argv) |
cee1d22c | 234 | { |
07801437 AW |
235 | struct scm_vm *vp; |
236 | struct scm_vm_cont *cp; | |
237 | SCM *argv_copy, *base; | |
238 | size_t i; | |
239 | ||
240 | argv_copy = alloca (n * sizeof(SCM)); | |
241 | memcpy (argv_copy, argv, n * sizeof(SCM)); | |
242 | ||
243 | vp = SCM_VM_DATA (vm); | |
244 | cp = SCM_VM_CONT_DATA (cont); | |
245 | base = SCM_FRAME_UPPER_ADDRESS (vp->fp) + 1; | |
246 | ||
247 | #define RELOC(scm_p) (scm_p + cp->reloc + (base - cp->stack_base)) | |
248 | ||
249 | if ((base - vp->stack_base) + cp->stack_size + n + 1 > vp->stack_size) | |
250 | { | |
251 | /* puts ("FIXME: Need to expand"); */ | |
252 | abort (); | |
253 | } | |
254 | ||
255 | memcpy (base, cp->stack_base, cp->stack_size * sizeof (SCM)); | |
256 | ||
257 | /* now relocate frame pointers */ | |
258 | { | |
259 | SCM *fp; | |
260 | for (fp = RELOC (cp->fp); | |
261 | SCM_FRAME_LOWER_ADDRESS (fp) > base; | |
262 | fp = SCM_FRAME_DYNAMIC_LINK (fp)) | |
263 | SCM_FRAME_SET_DYNAMIC_LINK (fp, RELOC (SCM_FRAME_DYNAMIC_LINK (fp))); | |
264 | } | |
265 | ||
266 | vp->sp = base - 1 + cp->stack_size; | |
267 | vp->fp = RELOC (cp->fp); | |
268 | vp->ip = cp->mvra; | |
269 | ||
270 | #undef RELOC | |
271 | ||
272 | /* now push args. ip is in a MV context. */ | |
273 | for (i = 0; i < n; i++) | |
274 | { | |
275 | vp->sp++; | |
276 | *vp->sp = argv_copy[i]; | |
277 | } | |
278 | vp->sp++; | |
279 | *vp->sp = scm_from_size_t (n); | |
9a1c6f1f AW |
280 | |
281 | /* Finally, rewind the dynamic state. */ | |
282 | { | |
283 | long delta = 0; | |
284 | SCM newwinds = scm_i_dynwinds (); | |
285 | for (; scm_is_pair (intwinds); intwinds = scm_cdr (intwinds), delta--) | |
286 | newwinds = scm_cons (scm_car (intwinds), newwinds); | |
287 | scm_dowinds (newwinds, delta); | |
288 | } | |
4f66bcde AW |
289 | } |
290 | ||
291 | \f | |
17e90c5e KN |
292 | /* |
293 | * VM Internal functions | |
294 | */ | |
295 | ||
f6a8e791 AW |
296 | SCM_SYMBOL (sym_vm_run, "vm-run"); |
297 | SCM_SYMBOL (sym_vm_error, "vm-error"); | |
298 | SCM_SYMBOL (sym_keyword_argument_error, "keyword-argument-error"); | |
299 | SCM_SYMBOL (sym_debug, "debug"); | |
17e90c5e | 300 | |
6f3b0cc2 AW |
301 | void |
302 | scm_i_vm_print (SCM x, SCM port, scm_print_state *pstate) | |
303 | { | |
304 | scm_puts ("#<vm ", port); | |
305 | scm_uintprint (SCM_UNPACK (x), 16, port); | |
306 | scm_puts (">", port); | |
307 | } | |
308 | ||
2fda0242 | 309 | static SCM |
d2d7acd5 | 310 | really_make_boot_program (long nargs) |
2fda0242 | 311 | { |
5bd047ce | 312 | SCM u8vec; |
97fcf583 AW |
313 | scm_t_uint8 text[] = { scm_op_mv_call, 0, 0, 0, 1, |
314 | scm_op_make_int8_1, scm_op_halt }; | |
28b119ee | 315 | struct scm_objcode *bp; |
3b9e095b | 316 | SCM ret; |
5bd047ce | 317 | |
53e28ed9 | 318 | if (SCM_UNLIKELY (nargs > 255 || nargs < 0)) |
2fda0242 | 319 | abort (); |
28b119ee AW |
320 | text[1] = (scm_t_uint8)nargs; |
321 | ||
d7e7a02a | 322 | bp = scm_malloc (sizeof (struct scm_objcode) + sizeof (text)); |
3dbbe28d | 323 | memcpy (SCM_C_OBJCODE_BASE (bp), text, sizeof (text)); |
28b119ee AW |
324 | bp->len = sizeof(text); |
325 | bp->metalen = 0; | |
28b119ee | 326 | |
7055591c AW |
327 | u8vec = scm_c_take_bytevector ((scm_t_int8*)bp, |
328 | sizeof (struct scm_objcode) + sizeof (text)); | |
5bd047ce | 329 | ret = scm_make_program (scm_bytecode_to_objcode (u8vec), |
20d47c39 | 330 | SCM_BOOL_F, SCM_BOOL_F); |
ba20f78a | 331 | SCM_SET_CELL_WORD_0 (ret, SCM_CELL_WORD_0 (ret) | SCM_F_PROGRAM_IS_BOOT); |
5bd047ce | 332 | |
3b9e095b | 333 | return ret; |
2fda0242 | 334 | } |
d2d7acd5 AW |
335 | #define NUM_BOOT_PROGS 8 |
336 | static SCM | |
337 | vm_make_boot_program (long nargs) | |
338 | { | |
339 | static SCM programs[NUM_BOOT_PROGS] = { 0, }; | |
340 | ||
341 | if (SCM_UNLIKELY (!programs[0])) | |
342 | { | |
343 | int i; | |
344 | for (i = 0; i < NUM_BOOT_PROGS; i++) | |
f39448c5 | 345 | programs[i] = really_make_boot_program (i); |
d2d7acd5 AW |
346 | } |
347 | ||
348 | if (SCM_LIKELY (nargs < NUM_BOOT_PROGS)) | |
349 | return programs[nargs]; | |
350 | else | |
351 | return really_make_boot_program (nargs); | |
352 | } | |
2fda0242 | 353 | |
a98cef7e KN |
354 | \f |
355 | /* | |
356 | * VM | |
357 | */ | |
358 | ||
b7393ea1 AW |
359 | static SCM |
360 | resolve_variable (SCM what, SCM program_module) | |
361 | { | |
9bd48cb1 | 362 | if (SCM_LIKELY (scm_is_symbol (what))) |
b7393ea1 AW |
363 | { |
364 | if (SCM_LIKELY (scm_module_system_booted_p | |
365 | && scm_is_true (program_module))) | |
366 | /* might longjmp */ | |
367 | return scm_module_lookup (program_module, what); | |
368 | else | |
369 | { | |
370 | SCM v = scm_sym2var (what, SCM_BOOL_F, SCM_BOOL_F); | |
371 | if (scm_is_false (v)) | |
372 | scm_misc_error (NULL, "unbound variable: ~S", scm_list_1 (what)); | |
373 | else | |
374 | return v; | |
375 | } | |
376 | } | |
377 | else | |
378 | { | |
379 | SCM mod; | |
380 | /* compilation of @ or @@ | |
381 | `what' is a three-element list: (MODNAME SYM INTERFACE?) | |
382 | INTERFACE? is #t if we compiled @ or #f if we compiled @@ | |
383 | */ | |
384 | mod = scm_resolve_module (SCM_CAR (what)); | |
385 | if (scm_is_true (SCM_CADDR (what))) | |
386 | mod = scm_module_public_interface (mod); | |
5c8cefe5 | 387 | if (scm_is_false (mod)) |
b7393ea1 AW |
388 | scm_misc_error (NULL, "no such module: ~S", |
389 | scm_list_1 (SCM_CAR (what))); | |
390 | /* might longjmp */ | |
391 | return scm_module_lookup (mod, SCM_CADR (what)); | |
392 | } | |
393 | } | |
394 | ||
51e9ba2f | 395 | #define VM_DEFAULT_STACK_SIZE (64 * 1024) |
17e90c5e | 396 | |
17e90c5e | 397 | #define VM_NAME vm_regular_engine |
6d14383e AW |
398 | #define FUNC_NAME "vm-regular-engine" |
399 | #define VM_ENGINE SCM_VM_REGULAR_ENGINE | |
83495480 | 400 | #include "vm-engine.c" |
17e90c5e | 401 | #undef VM_NAME |
6d14383e | 402 | #undef FUNC_NAME |
17e90c5e | 403 | #undef VM_ENGINE |
17e90c5e KN |
404 | |
405 | #define VM_NAME vm_debug_engine | |
6d14383e AW |
406 | #define FUNC_NAME "vm-debug-engine" |
407 | #define VM_ENGINE SCM_VM_DEBUG_ENGINE | |
83495480 | 408 | #include "vm-engine.c" |
17e90c5e | 409 | #undef VM_NAME |
6d14383e | 410 | #undef FUNC_NAME |
17e90c5e KN |
411 | #undef VM_ENGINE |
412 | ||
6d14383e AW |
413 | static const scm_t_vm_engine vm_engines[] = |
414 | { vm_regular_engine, vm_debug_engine }; | |
415 | ||
e3eb628d LC |
416 | #ifdef VM_ENABLE_PRECISE_STACK_GC_SCAN |
417 | ||
418 | /* The GC "kind" for the VM stack. */ | |
419 | static int vm_stack_gc_kind; | |
420 | ||
421 | #endif | |
422 | ||
a98cef7e | 423 | static SCM |
17e90c5e KN |
424 | make_vm (void) |
425 | #define FUNC_NAME "make_vm" | |
a98cef7e | 426 | { |
17e90c5e | 427 | int i; |
7f991c7d | 428 | struct scm_vm *vp; |
747a1635 | 429 | |
7f991c7d | 430 | vp = scm_gc_malloc (sizeof (struct scm_vm), "vm"); |
d8eeb67c | 431 | |
3d5ee0cd | 432 | vp->stack_size = VM_DEFAULT_STACK_SIZE; |
e3eb628d LC |
433 | |
434 | #ifdef VM_ENABLE_PRECISE_STACK_GC_SCAN | |
4168aa46 TTN |
435 | vp->stack_base = (SCM *) |
436 | GC_generic_malloc (vp->stack_size * sizeof (SCM), vm_stack_gc_kind); | |
e3eb628d LC |
437 | |
438 | /* Keep a pointer to VP so that `vm_stack_mark ()' can know what the stack | |
439 | top is. */ | |
440 | *vp->stack_base = PTR2SCM (vp); | |
441 | vp->stack_base++; | |
442 | vp->stack_size--; | |
443 | #else | |
d8eeb67c LC |
444 | vp->stack_base = scm_gc_malloc (vp->stack_size * sizeof (SCM), |
445 | "stack-base"); | |
e3eb628d LC |
446 | #endif |
447 | ||
2bbe1533 AW |
448 | #ifdef VM_ENABLE_STACK_NULLING |
449 | memset (vp->stack_base, 0, vp->stack_size * sizeof (SCM)); | |
450 | #endif | |
75d315e1 | 451 | vp->stack_limit = vp->stack_base + vp->stack_size; |
3616e9e9 KN |
452 | vp->ip = NULL; |
453 | vp->sp = vp->stack_base - 1; | |
454 | vp->fp = NULL; | |
6d14383e | 455 | vp->engine = SCM_VM_DEBUG_ENGINE; |
3d5ee0cd | 456 | vp->options = SCM_EOL; |
7656f194 | 457 | vp->trace_level = 0; |
17e90c5e | 458 | for (i = 0; i < SCM_VM_NUM_HOOKS; i++) |
3d5ee0cd | 459 | vp->hooks[i] = SCM_BOOL_F; |
2d026f04 | 460 | vp->cookie = 0; |
6f3b0cc2 | 461 | return scm_cell (scm_tc7_vm, (scm_t_bits)vp); |
a98cef7e | 462 | } |
17e90c5e | 463 | #undef FUNC_NAME |
a98cef7e | 464 | |
e3eb628d LC |
465 | #ifdef VM_ENABLE_PRECISE_STACK_GC_SCAN |
466 | ||
467 | /* Mark the VM stack region between its base and its current top. */ | |
468 | static struct GC_ms_entry * | |
469 | vm_stack_mark (GC_word *addr, struct GC_ms_entry *mark_stack_ptr, | |
470 | struct GC_ms_entry *mark_stack_limit, GC_word env) | |
471 | { | |
472 | GC_word *word; | |
473 | const struct scm_vm *vm; | |
474 | ||
475 | /* The first word of the VM stack should contain a pointer to the | |
476 | corresponding VM. */ | |
477 | vm = * ((struct scm_vm **) addr); | |
478 | ||
8071c490 LC |
479 | if (vm == NULL |
480 | || (SCM *) addr != vm->stack_base - 1 | |
78747ac6 | 481 | || vm->stack_limit - vm->stack_base != vm->stack_size) |
e3eb628d LC |
482 | /* ADDR must be a pointer to a free-list element, which we must ignore |
483 | (see warning in <gc/gc_mark.h>). */ | |
484 | return mark_stack_ptr; | |
485 | ||
e3eb628d LC |
486 | for (word = (GC_word *) vm->stack_base; word <= (GC_word *) vm->sp; word++) |
487 | mark_stack_ptr = GC_MARK_AND_PUSH ((* (GC_word **) word), | |
488 | mark_stack_ptr, mark_stack_limit, | |
489 | NULL); | |
490 | ||
491 | return mark_stack_ptr; | |
492 | } | |
493 | ||
494 | #endif /* VM_ENABLE_PRECISE_STACK_GC_SCAN */ | |
495 | ||
496 | ||
6d14383e | 497 | SCM |
4abef68f | 498 | scm_c_vm_run (SCM vm, SCM program, SCM *argv, int nargs) |
6d14383e | 499 | { |
4abef68f | 500 | struct scm_vm *vp = SCM_VM_DATA (vm); |
7656f194 | 501 | return vm_engines[vp->engine](vm, program, argv, nargs); |
6d14383e AW |
502 | } |
503 | ||
6f3b0cc2 AW |
504 | SCM_DEFINE (scm_vm_apply, "vm-apply", 3, 0, 0, |
505 | (SCM vm, SCM program, SCM args), | |
506 | "") | |
507 | #define FUNC_NAME s_scm_vm_apply | |
a98cef7e | 508 | { |
6d14383e AW |
509 | SCM *argv; |
510 | int i, nargs; | |
511 | ||
512 | SCM_VALIDATE_VM (1, vm); | |
67e2d80a | 513 | SCM_VALIDATE_PROC (2, program); |
6d14383e AW |
514 | |
515 | nargs = scm_ilength (args); | |
516 | if (SCM_UNLIKELY (nargs < 0)) | |
517 | scm_wrong_type_arg_msg (FUNC_NAME, 3, args, "list"); | |
518 | ||
519 | argv = alloca(nargs * sizeof(SCM)); | |
520 | for (i = 0; i < nargs; i++) | |
521 | { | |
522 | argv[i] = SCM_CAR (args); | |
523 | args = SCM_CDR (args); | |
524 | } | |
525 | ||
4abef68f | 526 | return scm_c_vm_run (vm, program, argv, nargs); |
a98cef7e | 527 | } |
17e90c5e | 528 | #undef FUNC_NAME |
a98cef7e | 529 | |
14aa25e4 AW |
530 | SCM |
531 | scm_vm_call_with_new_stack (SCM vm, SCM thunk, SCM id) | |
532 | { | |
533 | return scm_c_vm_run (vm, thunk, NULL, 0); | |
534 | } | |
535 | ||
a98cef7e KN |
536 | /* Scheme interface */ |
537 | ||
538 | SCM_DEFINE (scm_vm_version, "vm-version", 0, 0, 0, | |
17e90c5e KN |
539 | (void), |
540 | "") | |
a98cef7e KN |
541 | #define FUNC_NAME s_scm_vm_version |
542 | { | |
d3518113 | 543 | return scm_from_locale_string (PACKAGE_VERSION); |
a98cef7e KN |
544 | } |
545 | #undef FUNC_NAME | |
546 | ||
499a4c07 | 547 | SCM_DEFINE (scm_the_vm, "the-vm", 0, 0, 0, |
fcd4901b | 548 | (void), |
499a4c07 KN |
549 | "") |
550 | #define FUNC_NAME s_scm_the_vm | |
551 | { | |
2bbe1533 | 552 | scm_i_thread *t = SCM_I_CURRENT_THREAD; |
f63ea2ce | 553 | |
8b22ed7a | 554 | if (SCM_UNLIKELY (scm_is_false ((t->vm)))) |
2bbe1533 | 555 | t->vm = make_vm (); |
f63ea2ce | 556 | |
2bbe1533 | 557 | return t->vm; |
499a4c07 KN |
558 | } |
559 | #undef FUNC_NAME | |
560 | ||
561 | ||
a98cef7e KN |
562 | SCM_DEFINE (scm_vm_p, "vm?", 1, 0, 0, |
563 | (SCM obj), | |
17e90c5e | 564 | "") |
a98cef7e KN |
565 | #define FUNC_NAME s_scm_vm_p |
566 | { | |
9bd48cb1 | 567 | return scm_from_bool (SCM_VM_P (obj)); |
a98cef7e KN |
568 | } |
569 | #undef FUNC_NAME | |
570 | ||
571 | SCM_DEFINE (scm_make_vm, "make-vm", 0, 0, 0, | |
17e90c5e KN |
572 | (void), |
573 | "") | |
574 | #define FUNC_NAME s_scm_make_vm, | |
a98cef7e | 575 | { |
17e90c5e | 576 | return make_vm (); |
a98cef7e KN |
577 | } |
578 | #undef FUNC_NAME | |
579 | ||
17e90c5e | 580 | SCM_DEFINE (scm_vm_ip, "vm:ip", 1, 0, 0, |
a98cef7e | 581 | (SCM vm), |
17e90c5e KN |
582 | "") |
583 | #define FUNC_NAME s_scm_vm_ip | |
a98cef7e KN |
584 | { |
585 | SCM_VALIDATE_VM (1, vm); | |
f41cb00c | 586 | return scm_from_ulong ((unsigned long) SCM_VM_DATA (vm)->ip); |
a98cef7e KN |
587 | } |
588 | #undef FUNC_NAME | |
589 | ||
590 | SCM_DEFINE (scm_vm_sp, "vm:sp", 1, 0, 0, | |
591 | (SCM vm), | |
17e90c5e | 592 | "") |
a98cef7e KN |
593 | #define FUNC_NAME s_scm_vm_sp |
594 | { | |
595 | SCM_VALIDATE_VM (1, vm); | |
f41cb00c | 596 | return scm_from_ulong ((unsigned long) SCM_VM_DATA (vm)->sp); |
a98cef7e KN |
597 | } |
598 | #undef FUNC_NAME | |
599 | ||
600 | SCM_DEFINE (scm_vm_fp, "vm:fp", 1, 0, 0, | |
601 | (SCM vm), | |
17e90c5e | 602 | "") |
a98cef7e KN |
603 | #define FUNC_NAME s_scm_vm_fp |
604 | { | |
605 | SCM_VALIDATE_VM (1, vm); | |
f41cb00c | 606 | return scm_from_ulong ((unsigned long) SCM_VM_DATA (vm)->fp); |
a98cef7e KN |
607 | } |
608 | #undef FUNC_NAME | |
609 | ||
17e90c5e KN |
610 | #define VM_DEFINE_HOOK(n) \ |
611 | { \ | |
3d5ee0cd | 612 | struct scm_vm *vp; \ |
17e90c5e | 613 | SCM_VALIDATE_VM (1, vm); \ |
3d5ee0cd | 614 | vp = SCM_VM_DATA (vm); \ |
8b22ed7a | 615 | if (scm_is_false (vp->hooks[n])) \ |
238e7a11 | 616 | vp->hooks[n] = scm_make_hook (SCM_I_MAKINUM (1)); \ |
3d5ee0cd | 617 | return vp->hooks[n]; \ |
17e90c5e KN |
618 | } |
619 | ||
620 | SCM_DEFINE (scm_vm_boot_hook, "vm-boot-hook", 1, 0, 0, | |
a98cef7e | 621 | (SCM vm), |
17e90c5e KN |
622 | "") |
623 | #define FUNC_NAME s_scm_vm_boot_hook | |
a98cef7e | 624 | { |
17e90c5e | 625 | VM_DEFINE_HOOK (SCM_VM_BOOT_HOOK); |
a98cef7e KN |
626 | } |
627 | #undef FUNC_NAME | |
628 | ||
17e90c5e KN |
629 | SCM_DEFINE (scm_vm_halt_hook, "vm-halt-hook", 1, 0, 0, |
630 | (SCM vm), | |
631 | "") | |
632 | #define FUNC_NAME s_scm_vm_halt_hook | |
a98cef7e | 633 | { |
17e90c5e | 634 | VM_DEFINE_HOOK (SCM_VM_HALT_HOOK); |
a98cef7e KN |
635 | } |
636 | #undef FUNC_NAME | |
637 | ||
17e90c5e | 638 | SCM_DEFINE (scm_vm_next_hook, "vm-next-hook", 1, 0, 0, |
a98cef7e | 639 | (SCM vm), |
17e90c5e KN |
640 | "") |
641 | #define FUNC_NAME s_scm_vm_next_hook | |
a98cef7e | 642 | { |
17e90c5e | 643 | VM_DEFINE_HOOK (SCM_VM_NEXT_HOOK); |
a98cef7e KN |
644 | } |
645 | #undef FUNC_NAME | |
646 | ||
7a0d0cee KN |
647 | SCM_DEFINE (scm_vm_break_hook, "vm-break-hook", 1, 0, 0, |
648 | (SCM vm), | |
649 | "") | |
650 | #define FUNC_NAME s_scm_vm_break_hook | |
651 | { | |
652 | VM_DEFINE_HOOK (SCM_VM_BREAK_HOOK); | |
653 | } | |
654 | #undef FUNC_NAME | |
655 | ||
17e90c5e KN |
656 | SCM_DEFINE (scm_vm_enter_hook, "vm-enter-hook", 1, 0, 0, |
657 | (SCM vm), | |
658 | "") | |
659 | #define FUNC_NAME s_scm_vm_enter_hook | |
a98cef7e | 660 | { |
17e90c5e | 661 | VM_DEFINE_HOOK (SCM_VM_ENTER_HOOK); |
a98cef7e KN |
662 | } |
663 | #undef FUNC_NAME | |
664 | ||
17e90c5e KN |
665 | SCM_DEFINE (scm_vm_apply_hook, "vm-apply-hook", 1, 0, 0, |
666 | (SCM vm), | |
667 | "") | |
668 | #define FUNC_NAME s_scm_vm_apply_hook | |
a98cef7e | 669 | { |
17e90c5e | 670 | VM_DEFINE_HOOK (SCM_VM_APPLY_HOOK); |
a98cef7e KN |
671 | } |
672 | #undef FUNC_NAME | |
673 | ||
17e90c5e | 674 | SCM_DEFINE (scm_vm_exit_hook, "vm-exit-hook", 1, 0, 0, |
a98cef7e | 675 | (SCM vm), |
17e90c5e KN |
676 | "") |
677 | #define FUNC_NAME s_scm_vm_exit_hook | |
a98cef7e | 678 | { |
17e90c5e | 679 | VM_DEFINE_HOOK (SCM_VM_EXIT_HOOK); |
a98cef7e KN |
680 | } |
681 | #undef FUNC_NAME | |
682 | ||
17e90c5e | 683 | SCM_DEFINE (scm_vm_return_hook, "vm-return-hook", 1, 0, 0, |
a98cef7e | 684 | (SCM vm), |
17e90c5e KN |
685 | "") |
686 | #define FUNC_NAME s_scm_vm_return_hook | |
a98cef7e | 687 | { |
17e90c5e | 688 | VM_DEFINE_HOOK (SCM_VM_RETURN_HOOK); |
a98cef7e KN |
689 | } |
690 | #undef FUNC_NAME | |
691 | ||
17e90c5e KN |
692 | SCM_DEFINE (scm_vm_option, "vm-option", 2, 0, 0, |
693 | (SCM vm, SCM key), | |
694 | "") | |
695 | #define FUNC_NAME s_scm_vm_option | |
a98cef7e KN |
696 | { |
697 | SCM_VALIDATE_VM (1, vm); | |
17e90c5e | 698 | return scm_assq_ref (SCM_VM_DATA (vm)->options, key); |
a98cef7e KN |
699 | } |
700 | #undef FUNC_NAME | |
701 | ||
17e90c5e KN |
702 | SCM_DEFINE (scm_set_vm_option_x, "set-vm-option!", 3, 0, 0, |
703 | (SCM vm, SCM key, SCM val), | |
704 | "") | |
705 | #define FUNC_NAME s_scm_set_vm_option_x | |
a98cef7e KN |
706 | { |
707 | SCM_VALIDATE_VM (1, vm); | |
17e90c5e KN |
708 | SCM_VM_DATA (vm)->options |
709 | = scm_assq_set_x (SCM_VM_DATA (vm)->options, key, val); | |
710 | return SCM_UNSPECIFIED; | |
a98cef7e KN |
711 | } |
712 | #undef FUNC_NAME | |
713 | ||
7656f194 | 714 | SCM_DEFINE (scm_vm_trace_level, "vm-trace-level", 1, 0, 0, |
17e90c5e KN |
715 | (SCM vm), |
716 | "") | |
7656f194 | 717 | #define FUNC_NAME s_scm_vm_trace_level |
a98cef7e | 718 | { |
a98cef7e | 719 | SCM_VALIDATE_VM (1, vm); |
7656f194 AW |
720 | return scm_from_int (SCM_VM_DATA (vm)->trace_level); |
721 | } | |
722 | #undef FUNC_NAME | |
723 | ||
724 | SCM_DEFINE (scm_set_vm_trace_level_x, "set-vm-trace-level!", 2, 0, 0, | |
725 | (SCM vm, SCM level), | |
726 | "") | |
727 | #define FUNC_NAME s_scm_set_vm_trace_level_x | |
728 | { | |
729 | SCM_VALIDATE_VM (1, vm); | |
730 | SCM_VM_DATA (vm)->trace_level = scm_to_int (level); | |
731 | return SCM_UNSPECIFIED; | |
a98cef7e KN |
732 | } |
733 | #undef FUNC_NAME | |
734 | ||
735 | \f | |
736 | /* | |
17e90c5e | 737 | * Initialize |
a98cef7e KN |
738 | */ |
739 | ||
07e56b27 AW |
740 | SCM scm_load_compiled_with_vm (SCM file) |
741 | { | |
53e28ed9 | 742 | SCM program = scm_make_program (scm_load_objcode (file), |
20d47c39 | 743 | SCM_BOOL_F, SCM_BOOL_F); |
07e56b27 | 744 | |
4abef68f | 745 | return scm_c_vm_run (scm_the_vm (), program, NULL, 0); |
07e56b27 AW |
746 | } |
747 | ||
17e90c5e | 748 | void |
07e56b27 | 749 | scm_bootstrap_vm (void) |
17e90c5e | 750 | { |
60ae5ca2 AW |
751 | scm_c_register_extension ("libguile", "scm_init_vm", |
752 | (scm_t_extension_init_func)scm_init_vm, NULL); | |
753 | ||
e3eb628d LC |
754 | #ifdef VM_ENABLE_PRECISE_STACK_GC_SCAN |
755 | vm_stack_gc_kind = | |
756 | GC_new_kind (GC_new_free_list (), | |
757 | GC_MAKE_PROC (GC_new_proc (vm_stack_mark), 0), | |
758 | 0, 1); | |
759 | ||
760 | #endif | |
07e56b27 AW |
761 | } |
762 | ||
763 | void | |
764 | scm_init_vm (void) | |
765 | { | |
17e90c5e | 766 | #ifndef SCM_MAGIC_SNARFER |
aeeff258 | 767 | #include "libguile/vm.x" |
17e90c5e | 768 | #endif |
a98cef7e | 769 | } |
17e90c5e KN |
770 | |
771 | /* | |
772 | Local Variables: | |
773 | c-file-style: "gnu" | |
774 | End: | |
775 | */ |