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) | |
29366989 AW |
141 | scm_misc_error ("vm-engine", "not enough space to reinstate continuation", |
142 | scm_list_2 (vm, cont)); | |
143 | ||
11ea1aba AW |
144 | #ifdef VM_ENABLE_STACK_NULLING |
145 | { | |
d8873dfe | 146 | scm_t_ptrdiff nzero = (vp->sp - cp->sp); |
11ea1aba | 147 | if (nzero > 0) |
d8873dfe | 148 | memset (vp->stack_base + cp->stack_size, 0, nzero * sizeof (SCM)); |
66db076a AW |
149 | /* actually nzero should always be negative, because vm_reset_stack will |
150 | unwind the stack to some point *below* this continuation */ | |
11ea1aba AW |
151 | } |
152 | #endif | |
d8873dfe AW |
153 | vp->sp = cp->sp; |
154 | vp->fp = cp->fp; | |
155 | memcpy (vp->stack_base, cp->stack_base, cp->stack_size * sizeof (SCM)); | |
bfffd258 | 156 | |
d8873dfe AW |
157 | if (n == 1 || !cp->mvra) |
158 | { | |
159 | vp->ip = cp->ra; | |
160 | vp->sp++; | |
161 | *vp->sp = argv_copy[0]; | |
162 | } | |
163 | else | |
164 | { | |
165 | size_t i; | |
166 | for (i = 0; i < n; i++) | |
167 | { | |
168 | vp->sp++; | |
169 | *vp->sp = argv_copy[i]; | |
170 | } | |
171 | vp->sp++; | |
172 | *vp->sp = scm_from_size_t (n); | |
173 | vp->ip = cp->mvra; | |
174 | } | |
175 | } | |
bfffd258 | 176 | |
bfffd258 | 177 | SCM |
269479e3 | 178 | scm_i_vm_capture_continuation (SCM vm) |
bfffd258 | 179 | { |
d8873dfe | 180 | struct scm_vm *vp = SCM_VM_DATA (vm); |
cee1d22c | 181 | return scm_i_vm_capture_stack (vp->stack_base, vp->fp, vp->sp, vp->ip, NULL, 0); |
a98cef7e KN |
182 | } |
183 | ||
b1b942b7 | 184 | static void |
7656f194 | 185 | vm_dispatch_hook (SCM vm, int hook_num) |
b1b942b7 | 186 | { |
7656f194 AW |
187 | struct scm_vm *vp; |
188 | SCM hook; | |
189 | SCM frame; | |
b1b942b7 | 190 | |
7656f194 AW |
191 | vp = SCM_VM_DATA (vm); |
192 | hook = vp->hooks[hook_num]; | |
b1b942b7 | 193 | |
7656f194 AW |
194 | if (SCM_LIKELY (scm_is_false (hook)) |
195 | || scm_is_null (SCM_HOOK_PROCEDURES (hook))) | |
196 | return; | |
197 | ||
198 | vp->trace_level--; | |
199 | frame = scm_c_make_frame (vm, vp->fp, vp->sp, vp->ip, 0); | |
200 | scm_c_run_hookn (hook, &frame, 1); | |
201 | vp->trace_level++; | |
b1b942b7 AW |
202 | } |
203 | ||
cee1d22c | 204 | static void vm_abort (SCM vm, size_t n, scm_t_int64 cookie) SCM_NORETURN; |
4f66bcde | 205 | static void |
cee1d22c | 206 | vm_abort (SCM vm, size_t n, scm_t_int64 vm_cookie) |
4f66bcde | 207 | { |
eaefabee | 208 | size_t i; |
2d026f04 AW |
209 | ssize_t tail_len; |
210 | SCM tag, tail, *argv; | |
eaefabee | 211 | |
2d026f04 AW |
212 | /* FIXME: VM_ENABLE_STACK_NULLING */ |
213 | tail = *(SCM_VM_DATA (vm)->sp--); | |
214 | /* NULLSTACK (1) */ | |
215 | tail_len = scm_ilength (tail); | |
216 | if (tail_len < 0) | |
29366989 AW |
217 | scm_misc_error ("vm-engine", "tail values to abort should be a list", |
218 | scm_list_1 (tail)); | |
219 | ||
eaefabee | 220 | tag = SCM_VM_DATA (vm)->sp[-n]; |
2d026f04 | 221 | argv = alloca ((n + tail_len) * sizeof (SCM)); |
eaefabee AW |
222 | for (i = 0; i < n; i++) |
223 | argv[i] = SCM_VM_DATA (vm)->sp[-(n-1-i)]; | |
2d026f04 AW |
224 | for (; i < n + tail_len; i++, tail = scm_cdr (tail)) |
225 | argv[i] = scm_car (tail); | |
226 | /* NULLSTACK (n + 1) */ | |
eaefabee AW |
227 | SCM_VM_DATA (vm)->sp -= n + 1; |
228 | ||
cee1d22c AW |
229 | scm_c_abort (vm, tag, n + tail_len, argv, vm_cookie); |
230 | } | |
231 | ||
232 | static void | |
07801437 | 233 | vm_reinstate_partial_continuation (SCM vm, SCM cont, SCM intwinds, |
adbdfd6d | 234 | size_t n, SCM *argv, scm_t_int64 vm_cookie) |
cee1d22c | 235 | { |
07801437 AW |
236 | struct scm_vm *vp; |
237 | struct scm_vm_cont *cp; | |
238 | SCM *argv_copy, *base; | |
239 | size_t i; | |
240 | ||
241 | argv_copy = alloca (n * sizeof(SCM)); | |
242 | memcpy (argv_copy, argv, n * sizeof(SCM)); | |
243 | ||
244 | vp = SCM_VM_DATA (vm); | |
245 | cp = SCM_VM_CONT_DATA (cont); | |
246 | base = SCM_FRAME_UPPER_ADDRESS (vp->fp) + 1; | |
247 | ||
248 | #define RELOC(scm_p) (scm_p + cp->reloc + (base - cp->stack_base)) | |
249 | ||
250 | if ((base - vp->stack_base) + cp->stack_size + n + 1 > vp->stack_size) | |
29366989 AW |
251 | scm_misc_error ("vm-engine", |
252 | "not enough space to instate partial continuation", | |
253 | scm_list_2 (vm, cont)); | |
07801437 AW |
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 | ||
07801437 AW |
270 | /* now push args. ip is in a MV context. */ |
271 | for (i = 0; i < n; i++) | |
272 | { | |
273 | vp->sp++; | |
274 | *vp->sp = argv_copy[i]; | |
275 | } | |
276 | vp->sp++; | |
277 | *vp->sp = scm_from_size_t (n); | |
9a1c6f1f | 278 | |
adbdfd6d AW |
279 | /* Finally, rewind the dynamic state. |
280 | ||
281 | We have to treat prompts specially, because we could be rewinding the | |
282 | dynamic state from a different thread, or just a different position on the | |
283 | C and/or VM stack -- so we need to reset the jump buffers so that an abort | |
284 | comes back here, with appropriately adjusted sp and fp registers. */ | |
9a1c6f1f AW |
285 | { |
286 | long delta = 0; | |
287 | SCM newwinds = scm_i_dynwinds (); | |
288 | for (; scm_is_pair (intwinds); intwinds = scm_cdr (intwinds), delta--) | |
adbdfd6d AW |
289 | { |
290 | SCM x = scm_car (intwinds); | |
291 | if (SCM_PROMPT_P (x)) | |
292 | /* the jmpbuf will be reset by our caller */ | |
293 | x = scm_c_make_prompt (SCM_PROMPT_TAG (x), | |
294 | RELOC (SCM_PROMPT_REGISTERS (x)->fp), | |
295 | RELOC (SCM_PROMPT_REGISTERS (x)->sp), | |
296 | SCM_PROMPT_REGISTERS (x)->ip, | |
297 | SCM_PROMPT_ESCAPE_P (x), | |
298 | vm_cookie, | |
299 | newwinds); | |
300 | newwinds = scm_cons (x, newwinds); | |
301 | } | |
9a1c6f1f AW |
302 | scm_dowinds (newwinds, delta); |
303 | } | |
adbdfd6d | 304 | #undef RELOC |
4f66bcde AW |
305 | } |
306 | ||
307 | \f | |
17e90c5e KN |
308 | /* |
309 | * VM Internal functions | |
310 | */ | |
311 | ||
0404c97d AW |
312 | /* Unfortunately we can't snarf these: snarfed things are only loaded up from |
313 | (system vm vm), which might not be loaded before an error happens. */ | |
314 | static SCM sym_vm_run, sym_vm_error, sym_keyword_argument_error, sym_debug; | |
17e90c5e | 315 | |
6f3b0cc2 AW |
316 | void |
317 | scm_i_vm_print (SCM x, SCM port, scm_print_state *pstate) | |
318 | { | |
319 | scm_puts ("#<vm ", port); | |
320 | scm_uintprint (SCM_UNPACK (x), 16, port); | |
321 | scm_puts (">", port); | |
322 | } | |
323 | ||
2fda0242 | 324 | static SCM |
d2d7acd5 | 325 | really_make_boot_program (long nargs) |
2fda0242 | 326 | { |
5bd047ce | 327 | SCM u8vec; |
97fcf583 AW |
328 | scm_t_uint8 text[] = { scm_op_mv_call, 0, 0, 0, 1, |
329 | scm_op_make_int8_1, scm_op_halt }; | |
28b119ee | 330 | struct scm_objcode *bp; |
3b9e095b | 331 | SCM ret; |
5bd047ce | 332 | |
53e28ed9 | 333 | if (SCM_UNLIKELY (nargs > 255 || nargs < 0)) |
29366989 AW |
334 | scm_misc_error ("vm-engine", "too many args when making boot procedure", |
335 | scm_list_1 (scm_from_long (nargs))); | |
336 | ||
28b119ee AW |
337 | text[1] = (scm_t_uint8)nargs; |
338 | ||
d7e7a02a | 339 | bp = scm_malloc (sizeof (struct scm_objcode) + sizeof (text)); |
3dbbe28d | 340 | memcpy (SCM_C_OBJCODE_BASE (bp), text, sizeof (text)); |
28b119ee AW |
341 | bp->len = sizeof(text); |
342 | bp->metalen = 0; | |
28b119ee | 343 | |
7055591c AW |
344 | u8vec = scm_c_take_bytevector ((scm_t_int8*)bp, |
345 | sizeof (struct scm_objcode) + sizeof (text)); | |
5bd047ce | 346 | ret = scm_make_program (scm_bytecode_to_objcode (u8vec), |
20d47c39 | 347 | SCM_BOOL_F, SCM_BOOL_F); |
ba20f78a | 348 | SCM_SET_CELL_WORD_0 (ret, SCM_CELL_WORD_0 (ret) | SCM_F_PROGRAM_IS_BOOT); |
5bd047ce | 349 | |
3b9e095b | 350 | return ret; |
2fda0242 | 351 | } |
d2d7acd5 AW |
352 | #define NUM_BOOT_PROGS 8 |
353 | static SCM | |
354 | vm_make_boot_program (long nargs) | |
355 | { | |
356 | static SCM programs[NUM_BOOT_PROGS] = { 0, }; | |
357 | ||
358 | if (SCM_UNLIKELY (!programs[0])) | |
359 | { | |
360 | int i; | |
361 | for (i = 0; i < NUM_BOOT_PROGS; i++) | |
f39448c5 | 362 | programs[i] = really_make_boot_program (i); |
d2d7acd5 AW |
363 | } |
364 | ||
365 | if (SCM_LIKELY (nargs < NUM_BOOT_PROGS)) | |
366 | return programs[nargs]; | |
367 | else | |
368 | return really_make_boot_program (nargs); | |
369 | } | |
2fda0242 | 370 | |
a98cef7e KN |
371 | \f |
372 | /* | |
373 | * VM | |
374 | */ | |
375 | ||
b7393ea1 AW |
376 | static SCM |
377 | resolve_variable (SCM what, SCM program_module) | |
378 | { | |
9bd48cb1 | 379 | if (SCM_LIKELY (scm_is_symbol (what))) |
b7393ea1 AW |
380 | { |
381 | if (SCM_LIKELY (scm_module_system_booted_p | |
382 | && scm_is_true (program_module))) | |
383 | /* might longjmp */ | |
384 | return scm_module_lookup (program_module, what); | |
385 | else | |
386 | { | |
387 | SCM v = scm_sym2var (what, SCM_BOOL_F, SCM_BOOL_F); | |
388 | if (scm_is_false (v)) | |
389 | scm_misc_error (NULL, "unbound variable: ~S", scm_list_1 (what)); | |
390 | else | |
391 | return v; | |
392 | } | |
393 | } | |
394 | else | |
395 | { | |
396 | SCM mod; | |
397 | /* compilation of @ or @@ | |
398 | `what' is a three-element list: (MODNAME SYM INTERFACE?) | |
399 | INTERFACE? is #t if we compiled @ or #f if we compiled @@ | |
400 | */ | |
401 | mod = scm_resolve_module (SCM_CAR (what)); | |
402 | if (scm_is_true (SCM_CADDR (what))) | |
403 | mod = scm_module_public_interface (mod); | |
5c8cefe5 | 404 | if (scm_is_false (mod)) |
b7393ea1 AW |
405 | scm_misc_error (NULL, "no such module: ~S", |
406 | scm_list_1 (SCM_CAR (what))); | |
407 | /* might longjmp */ | |
408 | return scm_module_lookup (mod, SCM_CADR (what)); | |
409 | } | |
410 | } | |
411 | ||
51e9ba2f | 412 | #define VM_DEFAULT_STACK_SIZE (64 * 1024) |
17e90c5e | 413 | |
17e90c5e | 414 | #define VM_NAME vm_regular_engine |
6d14383e AW |
415 | #define FUNC_NAME "vm-regular-engine" |
416 | #define VM_ENGINE SCM_VM_REGULAR_ENGINE | |
83495480 | 417 | #include "vm-engine.c" |
17e90c5e | 418 | #undef VM_NAME |
6d14383e | 419 | #undef FUNC_NAME |
17e90c5e | 420 | #undef VM_ENGINE |
17e90c5e KN |
421 | |
422 | #define VM_NAME vm_debug_engine | |
6d14383e AW |
423 | #define FUNC_NAME "vm-debug-engine" |
424 | #define VM_ENGINE SCM_VM_DEBUG_ENGINE | |
83495480 | 425 | #include "vm-engine.c" |
17e90c5e | 426 | #undef VM_NAME |
6d14383e | 427 | #undef FUNC_NAME |
17e90c5e KN |
428 | #undef VM_ENGINE |
429 | ||
6d14383e AW |
430 | static const scm_t_vm_engine vm_engines[] = |
431 | { vm_regular_engine, vm_debug_engine }; | |
432 | ||
e3eb628d LC |
433 | #ifdef VM_ENABLE_PRECISE_STACK_GC_SCAN |
434 | ||
435 | /* The GC "kind" for the VM stack. */ | |
436 | static int vm_stack_gc_kind; | |
437 | ||
438 | #endif | |
439 | ||
a98cef7e | 440 | static SCM |
17e90c5e KN |
441 | make_vm (void) |
442 | #define FUNC_NAME "make_vm" | |
a98cef7e | 443 | { |
17e90c5e | 444 | int i; |
7f991c7d | 445 | struct scm_vm *vp; |
747a1635 | 446 | |
7f991c7d | 447 | vp = scm_gc_malloc (sizeof (struct scm_vm), "vm"); |
d8eeb67c | 448 | |
3d5ee0cd | 449 | vp->stack_size = VM_DEFAULT_STACK_SIZE; |
e3eb628d LC |
450 | |
451 | #ifdef VM_ENABLE_PRECISE_STACK_GC_SCAN | |
4168aa46 TTN |
452 | vp->stack_base = (SCM *) |
453 | GC_generic_malloc (vp->stack_size * sizeof (SCM), vm_stack_gc_kind); | |
e3eb628d LC |
454 | |
455 | /* Keep a pointer to VP so that `vm_stack_mark ()' can know what the stack | |
456 | top is. */ | |
457 | *vp->stack_base = PTR2SCM (vp); | |
458 | vp->stack_base++; | |
459 | vp->stack_size--; | |
460 | #else | |
d8eeb67c LC |
461 | vp->stack_base = scm_gc_malloc (vp->stack_size * sizeof (SCM), |
462 | "stack-base"); | |
e3eb628d LC |
463 | #endif |
464 | ||
2bbe1533 AW |
465 | #ifdef VM_ENABLE_STACK_NULLING |
466 | memset (vp->stack_base, 0, vp->stack_size * sizeof (SCM)); | |
467 | #endif | |
75d315e1 | 468 | vp->stack_limit = vp->stack_base + vp->stack_size; |
3616e9e9 KN |
469 | vp->ip = NULL; |
470 | vp->sp = vp->stack_base - 1; | |
471 | vp->fp = NULL; | |
6d14383e | 472 | vp->engine = SCM_VM_DEBUG_ENGINE; |
3d5ee0cd | 473 | vp->options = SCM_EOL; |
7656f194 | 474 | vp->trace_level = 0; |
17e90c5e | 475 | for (i = 0; i < SCM_VM_NUM_HOOKS; i++) |
3d5ee0cd | 476 | vp->hooks[i] = SCM_BOOL_F; |
2d026f04 | 477 | vp->cookie = 0; |
6f3b0cc2 | 478 | return scm_cell (scm_tc7_vm, (scm_t_bits)vp); |
a98cef7e | 479 | } |
17e90c5e | 480 | #undef FUNC_NAME |
a98cef7e | 481 | |
e3eb628d LC |
482 | #ifdef VM_ENABLE_PRECISE_STACK_GC_SCAN |
483 | ||
484 | /* Mark the VM stack region between its base and its current top. */ | |
485 | static struct GC_ms_entry * | |
486 | vm_stack_mark (GC_word *addr, struct GC_ms_entry *mark_stack_ptr, | |
487 | struct GC_ms_entry *mark_stack_limit, GC_word env) | |
488 | { | |
489 | GC_word *word; | |
490 | const struct scm_vm *vm; | |
491 | ||
492 | /* The first word of the VM stack should contain a pointer to the | |
493 | corresponding VM. */ | |
494 | vm = * ((struct scm_vm **) addr); | |
495 | ||
8071c490 LC |
496 | if (vm == NULL |
497 | || (SCM *) addr != vm->stack_base - 1 | |
78747ac6 | 498 | || vm->stack_limit - vm->stack_base != vm->stack_size) |
e3eb628d LC |
499 | /* ADDR must be a pointer to a free-list element, which we must ignore |
500 | (see warning in <gc/gc_mark.h>). */ | |
501 | return mark_stack_ptr; | |
502 | ||
e3eb628d LC |
503 | for (word = (GC_word *) vm->stack_base; word <= (GC_word *) vm->sp; word++) |
504 | mark_stack_ptr = GC_MARK_AND_PUSH ((* (GC_word **) word), | |
505 | mark_stack_ptr, mark_stack_limit, | |
506 | NULL); | |
507 | ||
508 | return mark_stack_ptr; | |
509 | } | |
510 | ||
511 | #endif /* VM_ENABLE_PRECISE_STACK_GC_SCAN */ | |
512 | ||
513 | ||
6d14383e | 514 | SCM |
4abef68f | 515 | scm_c_vm_run (SCM vm, SCM program, SCM *argv, int nargs) |
6d14383e | 516 | { |
4abef68f | 517 | struct scm_vm *vp = SCM_VM_DATA (vm); |
7656f194 | 518 | return vm_engines[vp->engine](vm, program, argv, nargs); |
6d14383e AW |
519 | } |
520 | ||
6f3b0cc2 AW |
521 | SCM_DEFINE (scm_vm_apply, "vm-apply", 3, 0, 0, |
522 | (SCM vm, SCM program, SCM args), | |
523 | "") | |
524 | #define FUNC_NAME s_scm_vm_apply | |
a98cef7e | 525 | { |
6d14383e AW |
526 | SCM *argv; |
527 | int i, nargs; | |
528 | ||
529 | SCM_VALIDATE_VM (1, vm); | |
67e2d80a | 530 | SCM_VALIDATE_PROC (2, program); |
6d14383e AW |
531 | |
532 | nargs = scm_ilength (args); | |
533 | if (SCM_UNLIKELY (nargs < 0)) | |
534 | scm_wrong_type_arg_msg (FUNC_NAME, 3, args, "list"); | |
535 | ||
536 | argv = alloca(nargs * sizeof(SCM)); | |
537 | for (i = 0; i < nargs; i++) | |
538 | { | |
539 | argv[i] = SCM_CAR (args); | |
540 | args = SCM_CDR (args); | |
541 | } | |
542 | ||
4abef68f | 543 | return scm_c_vm_run (vm, program, argv, nargs); |
a98cef7e | 544 | } |
17e90c5e | 545 | #undef FUNC_NAME |
a98cef7e KN |
546 | |
547 | /* Scheme interface */ | |
548 | ||
549 | SCM_DEFINE (scm_vm_version, "vm-version", 0, 0, 0, | |
17e90c5e KN |
550 | (void), |
551 | "") | |
a98cef7e KN |
552 | #define FUNC_NAME s_scm_vm_version |
553 | { | |
d3518113 | 554 | return scm_from_locale_string (PACKAGE_VERSION); |
a98cef7e KN |
555 | } |
556 | #undef FUNC_NAME | |
557 | ||
499a4c07 | 558 | SCM_DEFINE (scm_the_vm, "the-vm", 0, 0, 0, |
fcd4901b | 559 | (void), |
499a4c07 KN |
560 | "") |
561 | #define FUNC_NAME s_scm_the_vm | |
562 | { | |
2bbe1533 | 563 | scm_i_thread *t = SCM_I_CURRENT_THREAD; |
f63ea2ce | 564 | |
8b22ed7a | 565 | if (SCM_UNLIKELY (scm_is_false ((t->vm)))) |
2bbe1533 | 566 | t->vm = make_vm (); |
f63ea2ce | 567 | |
2bbe1533 | 568 | return t->vm; |
499a4c07 KN |
569 | } |
570 | #undef FUNC_NAME | |
571 | ||
572 | ||
a98cef7e KN |
573 | SCM_DEFINE (scm_vm_p, "vm?", 1, 0, 0, |
574 | (SCM obj), | |
17e90c5e | 575 | "") |
a98cef7e KN |
576 | #define FUNC_NAME s_scm_vm_p |
577 | { | |
9bd48cb1 | 578 | return scm_from_bool (SCM_VM_P (obj)); |
a98cef7e KN |
579 | } |
580 | #undef FUNC_NAME | |
581 | ||
582 | SCM_DEFINE (scm_make_vm, "make-vm", 0, 0, 0, | |
17e90c5e KN |
583 | (void), |
584 | "") | |
585 | #define FUNC_NAME s_scm_make_vm, | |
a98cef7e | 586 | { |
17e90c5e | 587 | return make_vm (); |
a98cef7e KN |
588 | } |
589 | #undef FUNC_NAME | |
590 | ||
17e90c5e | 591 | SCM_DEFINE (scm_vm_ip, "vm:ip", 1, 0, 0, |
a98cef7e | 592 | (SCM vm), |
17e90c5e KN |
593 | "") |
594 | #define FUNC_NAME s_scm_vm_ip | |
a98cef7e KN |
595 | { |
596 | SCM_VALIDATE_VM (1, vm); | |
f41cb00c | 597 | return scm_from_ulong ((unsigned long) SCM_VM_DATA (vm)->ip); |
a98cef7e KN |
598 | } |
599 | #undef FUNC_NAME | |
600 | ||
601 | SCM_DEFINE (scm_vm_sp, "vm:sp", 1, 0, 0, | |
602 | (SCM vm), | |
17e90c5e | 603 | "") |
a98cef7e KN |
604 | #define FUNC_NAME s_scm_vm_sp |
605 | { | |
606 | SCM_VALIDATE_VM (1, vm); | |
f41cb00c | 607 | return scm_from_ulong ((unsigned long) SCM_VM_DATA (vm)->sp); |
a98cef7e KN |
608 | } |
609 | #undef FUNC_NAME | |
610 | ||
611 | SCM_DEFINE (scm_vm_fp, "vm:fp", 1, 0, 0, | |
612 | (SCM vm), | |
17e90c5e | 613 | "") |
a98cef7e KN |
614 | #define FUNC_NAME s_scm_vm_fp |
615 | { | |
616 | SCM_VALIDATE_VM (1, vm); | |
f41cb00c | 617 | return scm_from_ulong ((unsigned long) SCM_VM_DATA (vm)->fp); |
a98cef7e KN |
618 | } |
619 | #undef FUNC_NAME | |
620 | ||
17e90c5e KN |
621 | #define VM_DEFINE_HOOK(n) \ |
622 | { \ | |
3d5ee0cd | 623 | struct scm_vm *vp; \ |
17e90c5e | 624 | SCM_VALIDATE_VM (1, vm); \ |
3d5ee0cd | 625 | vp = SCM_VM_DATA (vm); \ |
8b22ed7a | 626 | if (scm_is_false (vp->hooks[n])) \ |
238e7a11 | 627 | vp->hooks[n] = scm_make_hook (SCM_I_MAKINUM (1)); \ |
3d5ee0cd | 628 | return vp->hooks[n]; \ |
17e90c5e KN |
629 | } |
630 | ||
631 | SCM_DEFINE (scm_vm_boot_hook, "vm-boot-hook", 1, 0, 0, | |
a98cef7e | 632 | (SCM vm), |
17e90c5e KN |
633 | "") |
634 | #define FUNC_NAME s_scm_vm_boot_hook | |
a98cef7e | 635 | { |
17e90c5e | 636 | VM_DEFINE_HOOK (SCM_VM_BOOT_HOOK); |
a98cef7e KN |
637 | } |
638 | #undef FUNC_NAME | |
639 | ||
17e90c5e KN |
640 | SCM_DEFINE (scm_vm_halt_hook, "vm-halt-hook", 1, 0, 0, |
641 | (SCM vm), | |
642 | "") | |
643 | #define FUNC_NAME s_scm_vm_halt_hook | |
a98cef7e | 644 | { |
17e90c5e | 645 | VM_DEFINE_HOOK (SCM_VM_HALT_HOOK); |
a98cef7e KN |
646 | } |
647 | #undef FUNC_NAME | |
648 | ||
17e90c5e | 649 | SCM_DEFINE (scm_vm_next_hook, "vm-next-hook", 1, 0, 0, |
a98cef7e | 650 | (SCM vm), |
17e90c5e KN |
651 | "") |
652 | #define FUNC_NAME s_scm_vm_next_hook | |
a98cef7e | 653 | { |
17e90c5e | 654 | VM_DEFINE_HOOK (SCM_VM_NEXT_HOOK); |
a98cef7e KN |
655 | } |
656 | #undef FUNC_NAME | |
657 | ||
7a0d0cee KN |
658 | SCM_DEFINE (scm_vm_break_hook, "vm-break-hook", 1, 0, 0, |
659 | (SCM vm), | |
660 | "") | |
661 | #define FUNC_NAME s_scm_vm_break_hook | |
662 | { | |
663 | VM_DEFINE_HOOK (SCM_VM_BREAK_HOOK); | |
664 | } | |
665 | #undef FUNC_NAME | |
666 | ||
17e90c5e KN |
667 | SCM_DEFINE (scm_vm_enter_hook, "vm-enter-hook", 1, 0, 0, |
668 | (SCM vm), | |
669 | "") | |
670 | #define FUNC_NAME s_scm_vm_enter_hook | |
a98cef7e | 671 | { |
17e90c5e | 672 | VM_DEFINE_HOOK (SCM_VM_ENTER_HOOK); |
a98cef7e KN |
673 | } |
674 | #undef FUNC_NAME | |
675 | ||
17e90c5e KN |
676 | SCM_DEFINE (scm_vm_apply_hook, "vm-apply-hook", 1, 0, 0, |
677 | (SCM vm), | |
678 | "") | |
679 | #define FUNC_NAME s_scm_vm_apply_hook | |
a98cef7e | 680 | { |
17e90c5e | 681 | VM_DEFINE_HOOK (SCM_VM_APPLY_HOOK); |
a98cef7e KN |
682 | } |
683 | #undef FUNC_NAME | |
684 | ||
17e90c5e | 685 | SCM_DEFINE (scm_vm_exit_hook, "vm-exit-hook", 1, 0, 0, |
a98cef7e | 686 | (SCM vm), |
17e90c5e KN |
687 | "") |
688 | #define FUNC_NAME s_scm_vm_exit_hook | |
a98cef7e | 689 | { |
17e90c5e | 690 | VM_DEFINE_HOOK (SCM_VM_EXIT_HOOK); |
a98cef7e KN |
691 | } |
692 | #undef FUNC_NAME | |
693 | ||
17e90c5e | 694 | SCM_DEFINE (scm_vm_return_hook, "vm-return-hook", 1, 0, 0, |
a98cef7e | 695 | (SCM vm), |
17e90c5e KN |
696 | "") |
697 | #define FUNC_NAME s_scm_vm_return_hook | |
a98cef7e | 698 | { |
17e90c5e | 699 | VM_DEFINE_HOOK (SCM_VM_RETURN_HOOK); |
a98cef7e KN |
700 | } |
701 | #undef FUNC_NAME | |
702 | ||
17e90c5e KN |
703 | SCM_DEFINE (scm_vm_option, "vm-option", 2, 0, 0, |
704 | (SCM vm, SCM key), | |
705 | "") | |
706 | #define FUNC_NAME s_scm_vm_option | |
a98cef7e KN |
707 | { |
708 | SCM_VALIDATE_VM (1, vm); | |
17e90c5e | 709 | return scm_assq_ref (SCM_VM_DATA (vm)->options, key); |
a98cef7e KN |
710 | } |
711 | #undef FUNC_NAME | |
712 | ||
17e90c5e KN |
713 | SCM_DEFINE (scm_set_vm_option_x, "set-vm-option!", 3, 0, 0, |
714 | (SCM vm, SCM key, SCM val), | |
715 | "") | |
716 | #define FUNC_NAME s_scm_set_vm_option_x | |
a98cef7e KN |
717 | { |
718 | SCM_VALIDATE_VM (1, vm); | |
17e90c5e KN |
719 | SCM_VM_DATA (vm)->options |
720 | = scm_assq_set_x (SCM_VM_DATA (vm)->options, key, val); | |
721 | return SCM_UNSPECIFIED; | |
a98cef7e KN |
722 | } |
723 | #undef FUNC_NAME | |
724 | ||
7656f194 | 725 | SCM_DEFINE (scm_vm_trace_level, "vm-trace-level", 1, 0, 0, |
17e90c5e KN |
726 | (SCM vm), |
727 | "") | |
7656f194 | 728 | #define FUNC_NAME s_scm_vm_trace_level |
a98cef7e | 729 | { |
a98cef7e | 730 | SCM_VALIDATE_VM (1, vm); |
7656f194 AW |
731 | return scm_from_int (SCM_VM_DATA (vm)->trace_level); |
732 | } | |
733 | #undef FUNC_NAME | |
734 | ||
735 | SCM_DEFINE (scm_set_vm_trace_level_x, "set-vm-trace-level!", 2, 0, 0, | |
736 | (SCM vm, SCM level), | |
737 | "") | |
738 | #define FUNC_NAME s_scm_set_vm_trace_level_x | |
739 | { | |
740 | SCM_VALIDATE_VM (1, vm); | |
741 | SCM_VM_DATA (vm)->trace_level = scm_to_int (level); | |
742 | return SCM_UNSPECIFIED; | |
a98cef7e KN |
743 | } |
744 | #undef FUNC_NAME | |
745 | ||
746 | \f | |
747 | /* | |
17e90c5e | 748 | * Initialize |
a98cef7e KN |
749 | */ |
750 | ||
07e56b27 AW |
751 | SCM scm_load_compiled_with_vm (SCM file) |
752 | { | |
53e28ed9 | 753 | SCM program = scm_make_program (scm_load_objcode (file), |
20d47c39 | 754 | SCM_BOOL_F, SCM_BOOL_F); |
07e56b27 | 755 | |
4abef68f | 756 | return scm_c_vm_run (scm_the_vm (), program, NULL, 0); |
07e56b27 AW |
757 | } |
758 | ||
17e90c5e | 759 | void |
07e56b27 | 760 | scm_bootstrap_vm (void) |
17e90c5e | 761 | { |
60ae5ca2 AW |
762 | scm_c_register_extension ("libguile", "scm_init_vm", |
763 | (scm_t_extension_init_func)scm_init_vm, NULL); | |
764 | ||
35ac7852 AW |
765 | sym_vm_run = scm_from_locale_symbol ("vm-run"); |
766 | sym_vm_error = scm_from_locale_symbol ("vm-error"); | |
767 | sym_keyword_argument_error = scm_from_locale_symbol ("keyword-argument-error"); | |
768 | sym_debug = scm_from_locale_symbol ("debug"); | |
0404c97d | 769 | |
e3eb628d LC |
770 | #ifdef VM_ENABLE_PRECISE_STACK_GC_SCAN |
771 | vm_stack_gc_kind = | |
772 | GC_new_kind (GC_new_free_list (), | |
773 | GC_MAKE_PROC (GC_new_proc (vm_stack_mark), 0), | |
774 | 0, 1); | |
775 | ||
776 | #endif | |
07e56b27 AW |
777 | } |
778 | ||
779 | void | |
780 | scm_init_vm (void) | |
781 | { | |
17e90c5e | 782 | #ifndef SCM_MAGIC_SNARFER |
aeeff258 | 783 | #include "libguile/vm.x" |
17e90c5e | 784 | #endif |
a98cef7e | 785 | } |
17e90c5e KN |
786 | |
787 | /* | |
788 | Local Variables: | |
789 | c-file-style: "gnu" | |
790 | End: | |
791 | */ |