Commit | Line | Data |
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aab9d46c | 1 | /* Copyright (C) 2001, 2009, 2010, 2011, 2012, 2013 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> |
daccfef4 | 25 | #include <alignof.h> |
17e90c5e | 26 | #include <string.h> |
e78d4bf9 | 27 | #include <stdint.h> |
e3eb628d | 28 | |
1c44468d | 29 | #include "libguile/bdw-gc.h" |
e3eb628d LC |
30 | #include <gc/gc_mark.h> |
31 | ||
560b9c25 | 32 | #include "_scm.h" |
adaf86ec | 33 | #include "control.h" |
ac99cb0c | 34 | #include "frames.h" |
17e90c5e | 35 | #include "instructions.h" |
4cbc95f1 | 36 | #include "loader.h" |
ac99cb0c | 37 | #include "programs.h" |
a98cef7e | 38 | #include "vm.h" |
486013d6 | 39 | #include "vm-builtins.h" |
a98cef7e | 40 | |
aab9d46c SIT |
41 | #include "private-gc.h" /* scm_getenv_int */ |
42 | ||
97b18a66 | 43 | static int vm_default_engine = SCM_VM_REGULAR_ENGINE; |
ea9f4f4b AW |
44 | |
45 | /* Unfortunately we can't snarf these: snarfed things are only loaded up from | |
46 | (system vm vm), which might not be loaded before an error happens. */ | |
47 | static SCM sym_vm_run; | |
48 | static SCM sym_vm_error; | |
49 | static SCM sym_keyword_argument_error; | |
50 | static SCM sym_regular; | |
51 | static SCM sym_debug; | |
a98cef7e | 52 | |
11ea1aba AW |
53 | /* The VM has a number of internal assertions that shouldn't normally be |
54 | necessary, but might be if you think you found a bug in the VM. */ | |
55 | #define VM_ENABLE_ASSERTIONS | |
56 | ||
53e28ed9 AW |
57 | /* #define VM_ENABLE_PARANOID_ASSERTIONS */ |
58 | ||
e3eb628d LC |
59 | /* When defined, arrange so that the GC doesn't scan the VM stack beyond its |
60 | current SP. This should help avoid excess data retention. See | |
61 | http://thread.gmane.org/gmane.comp.programming.garbage-collection.boehmgc/3001 | |
62 | for a discussion. */ | |
63 | #define VM_ENABLE_PRECISE_STACK_GC_SCAN | |
64 | ||
f1046e6b LC |
65 | /* Size in SCM objects of the stack reserve. The reserve is used to run |
66 | exception handling code in case of a VM stack overflow. */ | |
67 | #define VM_STACK_RESERVE_SIZE 512 | |
68 | ||
e3eb628d | 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 | { | |
0607ebbf | 78 | scm_puts_unlocked ("#<vm-continuation ", port); |
6f3b0cc2 | 79 | scm_uintprint (SCM_UNPACK (x), 16, port); |
0607ebbf | 80 | scm_puts_unlocked (">", port); |
6f3b0cc2 | 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 | 94 | SCM |
9121d9f1 | 95 | scm_i_vm_capture_stack (SCM *stack_base, SCM *fp, SCM *sp, scm_t_uint32 *ra, |
840ec334 | 96 | scm_t_dynstack *dynstack, 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 | 104 | p->ra = ra; |
d8873dfe AW |
105 | p->sp = sp; |
106 | p->fp = fp; | |
107 | memcpy (p->stack_base, stack_base, (sp + 1 - stack_base) * sizeof (SCM)); | |
108 | p->reloc = p->stack_base - stack_base; | |
9ede013f | 109 | p->dynstack = dynstack; |
cee1d22c | 110 | p->flags = flags; |
6f3b0cc2 | 111 | return scm_cell (scm_tc7_vm_cont, (scm_t_bits)p); |
a98cef7e KN |
112 | } |
113 | ||
114 | static void | |
d8873dfe | 115 | vm_return_to_continuation (SCM vm, SCM cont, size_t n, SCM *argv) |
a98cef7e | 116 | { |
d8873dfe AW |
117 | struct scm_vm *vp; |
118 | struct scm_vm_cont *cp; | |
119 | SCM *argv_copy; | |
120 | ||
121 | argv_copy = alloca (n * sizeof(SCM)); | |
122 | memcpy (argv_copy, argv, n * sizeof(SCM)); | |
123 | ||
124 | vp = SCM_VM_DATA (vm); | |
125 | cp = SCM_VM_CONT_DATA (cont); | |
126 | ||
f8085163 | 127 | if (vp->stack_size < cp->stack_size + n + 3) |
29366989 AW |
128 | scm_misc_error ("vm-engine", "not enough space to reinstate continuation", |
129 | scm_list_2 (vm, cont)); | |
130 | ||
d8873dfe AW |
131 | vp->sp = cp->sp; |
132 | vp->fp = cp->fp; | |
133 | memcpy (vp->stack_base, cp->stack_base, cp->stack_size * sizeof (SCM)); | |
bfffd258 | 134 | |
03f16599 AW |
135 | { |
136 | size_t i; | |
137 | ||
138 | /* Push on an empty frame, as the continuation expects. */ | |
f8085163 | 139 | for (i = 0; i < 3; i++) |
03f16599 AW |
140 | { |
141 | vp->sp++; | |
142 | *vp->sp = SCM_BOOL_F; | |
143 | } | |
144 | ||
145 | /* Push the return values. */ | |
146 | for (i = 0; i < n; i++) | |
147 | { | |
148 | vp->sp++; | |
149 | *vp->sp = argv_copy[i]; | |
150 | } | |
840ec334 | 151 | vp->ip = cp->ra; |
03f16599 | 152 | } |
d8873dfe | 153 | } |
bfffd258 | 154 | |
bfffd258 | 155 | SCM |
9ede013f | 156 | scm_i_capture_current_stack (void) |
bfffd258 | 157 | { |
9ede013f AW |
158 | scm_i_thread *thread; |
159 | SCM vm; | |
160 | struct scm_vm *vp; | |
161 | ||
162 | thread = SCM_I_CURRENT_THREAD; | |
163 | vm = scm_the_vm (); | |
164 | vp = SCM_VM_DATA (vm); | |
165 | ||
840ec334 | 166 | return scm_i_vm_capture_stack (vp->stack_base, vp->fp, vp->sp, vp->ip, |
9ede013f AW |
167 | scm_dynstack_capture_all (&thread->dynstack), |
168 | 0); | |
a98cef7e KN |
169 | } |
170 | ||
c850a0ff AW |
171 | static void vm_dispatch_hook (SCM vm, int hook_num, |
172 | SCM *argv, int n) SCM_NOINLINE; | |
173 | ||
b1b942b7 | 174 | static void |
c850a0ff | 175 | vm_dispatch_hook (SCM vm, int hook_num, SCM *argv, int n) |
b1b942b7 | 176 | { |
7656f194 AW |
177 | struct scm_vm *vp; |
178 | SCM hook; | |
b3567435 | 179 | struct scm_frame c_frame; |
8e4c60ff | 180 | scm_t_cell *frame; |
893fb8d0 | 181 | int saved_trace_level; |
b1b942b7 | 182 | |
7656f194 AW |
183 | vp = SCM_VM_DATA (vm); |
184 | hook = vp->hooks[hook_num]; | |
b1b942b7 | 185 | |
7656f194 AW |
186 | if (SCM_LIKELY (scm_is_false (hook)) |
187 | || scm_is_null (SCM_HOOK_PROCEDURES (hook))) | |
188 | return; | |
b3567435 | 189 | |
893fb8d0 AW |
190 | saved_trace_level = vp->trace_level; |
191 | vp->trace_level = 0; | |
b3567435 LC |
192 | |
193 | /* Allocate a frame object on the stack. This is more efficient than calling | |
194 | `scm_c_make_frame ()' to allocate on the heap, but it forces hooks to not | |
195 | capture frame objects. | |
196 | ||
197 | At the same time, procedures such as `frame-procedure' make sense only | |
198 | while the stack frame represented by the frame object is visible, so it | |
199 | seems reasonable to limit the lifetime of frame objects. */ | |
200 | ||
201 | c_frame.stack_holder = vm; | |
202 | c_frame.fp = vp->fp; | |
203 | c_frame.sp = vp->sp; | |
204 | c_frame.ip = vp->ip; | |
205 | c_frame.offset = 0; | |
8e4c60ff LC |
206 | |
207 | /* Arrange for FRAME to be 8-byte aligned, like any other cell. */ | |
208 | frame = alloca (sizeof (*frame) + 8); | |
209 | frame = (scm_t_cell *) ROUND_UP ((scm_t_uintptr) frame, 8UL); | |
210 | ||
211 | frame->word_0 = SCM_PACK (scm_tc7_frame); | |
21041372 | 212 | frame->word_1 = SCM_PACK_POINTER (&c_frame); |
b3567435 | 213 | |
c850a0ff AW |
214 | if (n == 0) |
215 | { | |
216 | SCM args[1]; | |
217 | ||
218 | args[0] = SCM_PACK_POINTER (frame); | |
219 | scm_c_run_hookn (hook, args, 1); | |
220 | } | |
221 | else if (n == 1) | |
222 | { | |
223 | SCM args[2]; | |
224 | ||
225 | args[0] = SCM_PACK_POINTER (frame); | |
226 | args[1] = argv[0]; | |
227 | scm_c_run_hookn (hook, args, 2); | |
228 | } | |
229 | else | |
230 | { | |
231 | SCM args = SCM_EOL; | |
232 | ||
233 | while (n--) | |
234 | args = scm_cons (argv[n], args); | |
235 | scm_c_run_hook (hook, scm_cons (SCM_PACK_POINTER (frame), args)); | |
236 | } | |
b3567435 | 237 | |
893fb8d0 | 238 | vp->trace_level = saved_trace_level; |
b1b942b7 AW |
239 | } |
240 | ||
4f66bcde | 241 | static void |
99511cd0 AW |
242 | vm_abort (SCM vm, SCM tag, size_t nstack, SCM *stack_args, SCM tail, SCM *sp, |
243 | scm_i_jmp_buf *current_registers) SCM_NORETURN; | |
9d381ba4 AW |
244 | |
245 | static void | |
99511cd0 AW |
246 | vm_abort (SCM vm, SCM tag, size_t nstack, SCM *stack_args, SCM tail, SCM *sp, |
247 | scm_i_jmp_buf *current_registers) | |
4f66bcde | 248 | { |
eaefabee | 249 | size_t i; |
2d026f04 | 250 | ssize_t tail_len; |
99511cd0 | 251 | SCM *argv; |
eaefabee | 252 | |
2d026f04 AW |
253 | tail_len = scm_ilength (tail); |
254 | if (tail_len < 0) | |
29366989 AW |
255 | scm_misc_error ("vm-engine", "tail values to abort should be a list", |
256 | scm_list_1 (tail)); | |
257 | ||
99511cd0 AW |
258 | argv = alloca ((nstack + tail_len) * sizeof (SCM)); |
259 | for (i = 0; i < nstack; i++) | |
260 | argv[i] = stack_args[i]; | |
261 | for (; i < nstack + tail_len; i++, tail = scm_cdr (tail)) | |
2d026f04 | 262 | argv[i] = scm_car (tail); |
eaefabee | 263 | |
99511cd0 AW |
264 | /* FIXME: NULLSTACK (SCM_VM_DATA (vp)->sp - sp) */ |
265 | SCM_VM_DATA (vm)->sp = sp; | |
266 | ||
267 | scm_c_abort (vm, tag, nstack + tail_len, argv, current_registers); | |
cee1d22c AW |
268 | } |
269 | ||
9d381ba4 AW |
270 | static void |
271 | vm_reinstate_partial_continuation (SCM vm, SCM cont, size_t n, SCM *argv, | |
272 | scm_t_dynstack *dynstack, | |
273 | scm_i_jmp_buf *registers) | |
cee1d22c | 274 | { |
07801437 AW |
275 | struct scm_vm *vp; |
276 | struct scm_vm_cont *cp; | |
277 | SCM *argv_copy, *base; | |
9ede013f | 278 | scm_t_ptrdiff reloc; |
07801437 AW |
279 | size_t i; |
280 | ||
281 | argv_copy = alloca (n * sizeof(SCM)); | |
282 | memcpy (argv_copy, argv, n * sizeof(SCM)); | |
283 | ||
284 | vp = SCM_VM_DATA (vm); | |
285 | cp = SCM_VM_CONT_DATA (cont); | |
b636cdb0 | 286 | base = SCM_FRAME_LOCALS_ADDRESS (vp->fp); |
9ede013f | 287 | reloc = cp->reloc + (base - cp->stack_base); |
07801437 | 288 | |
0fc9040f | 289 | #define RELOC(scm_p) \ |
9ede013f | 290 | (((SCM *) (scm_p)) + reloc) |
07801437 AW |
291 | |
292 | if ((base - vp->stack_base) + cp->stack_size + n + 1 > vp->stack_size) | |
29366989 AW |
293 | scm_misc_error ("vm-engine", |
294 | "not enough space to instate partial continuation", | |
295 | scm_list_2 (vm, cont)); | |
07801437 AW |
296 | |
297 | memcpy (base, cp->stack_base, cp->stack_size * sizeof (SCM)); | |
298 | ||
299 | /* now relocate frame pointers */ | |
300 | { | |
301 | SCM *fp; | |
302 | for (fp = RELOC (cp->fp); | |
303 | SCM_FRAME_LOWER_ADDRESS (fp) > base; | |
304 | fp = SCM_FRAME_DYNAMIC_LINK (fp)) | |
305 | SCM_FRAME_SET_DYNAMIC_LINK (fp, RELOC (SCM_FRAME_DYNAMIC_LINK (fp))); | |
306 | } | |
307 | ||
308 | vp->sp = base - 1 + cp->stack_size; | |
309 | vp->fp = RELOC (cp->fp); | |
840ec334 | 310 | vp->ip = cp->ra; |
07801437 | 311 | |
840ec334 | 312 | /* Push the arguments. */ |
07801437 AW |
313 | for (i = 0; i < n; i++) |
314 | { | |
315 | vp->sp++; | |
316 | *vp->sp = argv_copy[i]; | |
317 | } | |
9a1c6f1f | 318 | |
9d381ba4 AW |
319 | /* The prompt captured a slice of the dynamic stack. Here we wind |
320 | those entries onto the current thread's stack. We also have to | |
321 | relocate any prompts that we see along the way. */ | |
322 | { | |
323 | scm_t_bits *walk; | |
324 | ||
325 | for (walk = SCM_DYNSTACK_FIRST (cp->dynstack); | |
326 | SCM_DYNSTACK_TAG (walk); | |
327 | walk = SCM_DYNSTACK_NEXT (walk)) | |
328 | { | |
329 | scm_t_bits tag = SCM_DYNSTACK_TAG (walk); | |
330 | ||
331 | if (SCM_DYNSTACK_TAG_TYPE (tag) == SCM_DYNSTACK_TYPE_PROMPT) | |
332 | scm_dynstack_wind_prompt (dynstack, walk, reloc, registers); | |
333 | else | |
334 | scm_dynstack_wind_1 (dynstack, walk); | |
335 | } | |
336 | } | |
adbdfd6d | 337 | #undef RELOC |
4f66bcde AW |
338 | } |
339 | ||
340 | \f | |
17e90c5e KN |
341 | /* |
342 | * VM Internal functions | |
343 | */ | |
344 | ||
6f3b0cc2 AW |
345 | void |
346 | scm_i_vm_print (SCM x, SCM port, scm_print_state *pstate) | |
347 | { | |
0a935b2a LC |
348 | const struct scm_vm *vm; |
349 | ||
350 | vm = SCM_VM_DATA (x); | |
351 | ||
0607ebbf | 352 | scm_puts_unlocked ("#<vm ", port); |
0a935b2a LC |
353 | switch (vm->engine) |
354 | { | |
355 | case SCM_VM_REGULAR_ENGINE: | |
0607ebbf | 356 | scm_puts_unlocked ("regular-engine ", port); |
0a935b2a LC |
357 | break; |
358 | ||
359 | case SCM_VM_DEBUG_ENGINE: | |
0607ebbf | 360 | scm_puts_unlocked ("debug-engine ", port); |
0a935b2a LC |
361 | break; |
362 | ||
363 | default: | |
0607ebbf | 364 | scm_puts_unlocked ("unknown-engine ", port); |
0a935b2a | 365 | } |
6f3b0cc2 | 366 | scm_uintprint (SCM_UNPACK (x), 16, port); |
0607ebbf | 367 | scm_puts_unlocked (">", port); |
6f3b0cc2 AW |
368 | } |
369 | ||
53bdfcf0 AW |
370 | \f |
371 | /* | |
372 | * VM Error Handling | |
373 | */ | |
374 | ||
375 | static void vm_error (const char *msg, SCM arg) SCM_NORETURN; | |
4d497b62 AW |
376 | static void vm_error_bad_instruction (scm_t_uint32 inst) SCM_NORETURN SCM_NOINLINE; |
377 | static void vm_error_unbound (SCM proc, SCM sym) SCM_NORETURN SCM_NOINLINE; | |
378 | static void vm_error_unbound_fluid (SCM proc, SCM fluid) SCM_NORETURN SCM_NOINLINE; | |
379 | static void vm_error_not_a_variable (const char *func_name, SCM x) SCM_NORETURN SCM_NOINLINE; | |
380 | static void vm_error_apply_to_non_list (SCM x) SCM_NORETURN SCM_NOINLINE; | |
381 | static void vm_error_kwargs_length_not_even (SCM proc) SCM_NORETURN SCM_NOINLINE; | |
28d5d253 MW |
382 | static void vm_error_kwargs_invalid_keyword (SCM proc, SCM obj) SCM_NORETURN SCM_NOINLINE; |
383 | static void vm_error_kwargs_unrecognized_keyword (SCM proc, SCM kw) SCM_NORETURN SCM_NOINLINE; | |
4d497b62 AW |
384 | static void vm_error_too_many_args (int nargs) SCM_NORETURN SCM_NOINLINE; |
385 | static void vm_error_wrong_num_args (SCM proc) SCM_NORETURN SCM_NOINLINE; | |
386 | static void vm_error_wrong_type_apply (SCM proc) SCM_NORETURN SCM_NOINLINE; | |
387 | static void vm_error_stack_overflow (struct scm_vm *vp) SCM_NORETURN SCM_NOINLINE; | |
388 | static void vm_error_stack_underflow (void) SCM_NORETURN SCM_NOINLINE; | |
389 | static void vm_error_improper_list (SCM x) SCM_NORETURN SCM_NOINLINE; | |
390 | static void vm_error_not_a_pair (const char *subr, SCM x) SCM_NORETURN SCM_NOINLINE; | |
391 | static void vm_error_not_a_bytevector (const char *subr, SCM x) SCM_NORETURN SCM_NOINLINE; | |
392 | static void vm_error_not_a_struct (const char *subr, SCM x) SCM_NORETURN SCM_NOINLINE; | |
393 | static void vm_error_no_values (void) SCM_NORETURN SCM_NOINLINE; | |
394 | static void vm_error_not_enough_values (void) SCM_NORETURN SCM_NOINLINE; | |
82f4bac4 | 395 | static void vm_error_wrong_number_of_values (scm_t_uint32 expected) SCM_NORETURN SCM_NOINLINE; |
4d497b62 AW |
396 | static void vm_error_continuation_not_rewindable (SCM cont) SCM_NORETURN SCM_NOINLINE; |
397 | static void vm_error_bad_wide_string_length (size_t len) SCM_NORETURN SCM_NOINLINE; | |
53bdfcf0 AW |
398 | |
399 | static void | |
400 | vm_error (const char *msg, SCM arg) | |
401 | { | |
402 | scm_throw (sym_vm_error, | |
403 | scm_list_3 (sym_vm_run, scm_from_latin1_string (msg), | |
404 | SCM_UNBNDP (arg) ? SCM_EOL : scm_list_1 (arg))); | |
405 | abort(); /* not reached */ | |
406 | } | |
407 | ||
408 | static void | |
409 | vm_error_bad_instruction (scm_t_uint32 inst) | |
410 | { | |
411 | vm_error ("VM: Bad instruction: ~s", scm_from_uint32 (inst)); | |
412 | } | |
413 | ||
414 | static void | |
415 | vm_error_unbound (SCM proc, SCM sym) | |
416 | { | |
417 | scm_error_scm (scm_misc_error_key, proc, | |
418 | scm_from_latin1_string ("Unbound variable: ~s"), | |
419 | scm_list_1 (sym), SCM_BOOL_F); | |
420 | } | |
421 | ||
422 | static void | |
423 | vm_error_unbound_fluid (SCM proc, SCM fluid) | |
424 | { | |
425 | scm_error_scm (scm_misc_error_key, proc, | |
426 | scm_from_latin1_string ("Unbound fluid: ~s"), | |
427 | scm_list_1 (fluid), SCM_BOOL_F); | |
428 | } | |
429 | ||
430 | static void | |
431 | vm_error_not_a_variable (const char *func_name, SCM x) | |
432 | { | |
433 | scm_error (scm_arg_type_key, func_name, "Not a variable: ~S", | |
434 | scm_list_1 (x), scm_list_1 (x)); | |
435 | } | |
436 | ||
53bdfcf0 AW |
437 | static void |
438 | vm_error_apply_to_non_list (SCM x) | |
439 | { | |
440 | scm_error (scm_arg_type_key, "apply", "Apply to non-list: ~S", | |
441 | scm_list_1 (x), scm_list_1 (x)); | |
442 | } | |
443 | ||
444 | static void | |
445 | vm_error_kwargs_length_not_even (SCM proc) | |
446 | { | |
447 | scm_error_scm (sym_keyword_argument_error, proc, | |
448 | scm_from_latin1_string ("Odd length of keyword argument list"), | |
449 | SCM_EOL, SCM_BOOL_F); | |
450 | } | |
451 | ||
452 | static void | |
4af0d97e | 453 | vm_error_kwargs_invalid_keyword (SCM proc, SCM obj) |
53bdfcf0 AW |
454 | { |
455 | scm_error_scm (sym_keyword_argument_error, proc, | |
456 | scm_from_latin1_string ("Invalid keyword"), | |
4af0d97e | 457 | SCM_EOL, scm_list_1 (obj)); |
53bdfcf0 AW |
458 | } |
459 | ||
460 | static void | |
4af0d97e | 461 | vm_error_kwargs_unrecognized_keyword (SCM proc, SCM kw) |
53bdfcf0 AW |
462 | { |
463 | scm_error_scm (sym_keyword_argument_error, proc, | |
464 | scm_from_latin1_string ("Unrecognized keyword"), | |
4af0d97e | 465 | SCM_EOL, scm_list_1 (kw)); |
53bdfcf0 AW |
466 | } |
467 | ||
468 | static void | |
469 | vm_error_too_many_args (int nargs) | |
470 | { | |
471 | vm_error ("VM: Too many arguments", scm_from_int (nargs)); | |
472 | } | |
473 | ||
474 | static void | |
475 | vm_error_wrong_num_args (SCM proc) | |
476 | { | |
477 | scm_wrong_num_args (proc); | |
478 | } | |
479 | ||
480 | static void | |
481 | vm_error_wrong_type_apply (SCM proc) | |
482 | { | |
483 | scm_error (scm_arg_type_key, NULL, "Wrong type to apply: ~S", | |
484 | scm_list_1 (proc), scm_list_1 (proc)); | |
485 | } | |
486 | ||
487 | static void | |
488 | vm_error_stack_overflow (struct scm_vm *vp) | |
489 | { | |
490 | if (vp->stack_limit < vp->stack_base + vp->stack_size) | |
491 | /* There are VM_STACK_RESERVE_SIZE bytes left. Make them available so | |
492 | that `throw' below can run on this VM. */ | |
493 | vp->stack_limit = vp->stack_base + vp->stack_size; | |
494 | else | |
495 | /* There is no space left on the stack. FIXME: Do something more | |
496 | sensible here! */ | |
497 | abort (); | |
498 | vm_error ("VM: Stack overflow", SCM_UNDEFINED); | |
499 | } | |
500 | ||
501 | static void | |
502 | vm_error_stack_underflow (void) | |
503 | { | |
504 | vm_error ("VM: Stack underflow", SCM_UNDEFINED); | |
505 | } | |
506 | ||
507 | static void | |
508 | vm_error_improper_list (SCM x) | |
509 | { | |
510 | vm_error ("Expected a proper list, but got object with tail ~s", x); | |
511 | } | |
512 | ||
513 | static void | |
514 | vm_error_not_a_pair (const char *subr, SCM x) | |
515 | { | |
516 | scm_wrong_type_arg_msg (subr, 1, x, "pair"); | |
517 | } | |
518 | ||
519 | static void | |
520 | vm_error_not_a_bytevector (const char *subr, SCM x) | |
521 | { | |
522 | scm_wrong_type_arg_msg (subr, 1, x, "bytevector"); | |
523 | } | |
524 | ||
525 | static void | |
526 | vm_error_not_a_struct (const char *subr, SCM x) | |
527 | { | |
528 | scm_wrong_type_arg_msg (subr, 1, x, "struct"); | |
529 | } | |
530 | ||
531 | static void | |
532 | vm_error_no_values (void) | |
533 | { | |
534 | vm_error ("Zero values returned to single-valued continuation", | |
535 | SCM_UNDEFINED); | |
536 | } | |
537 | ||
538 | static void | |
539 | vm_error_not_enough_values (void) | |
540 | { | |
541 | vm_error ("Too few values returned to continuation", SCM_UNDEFINED); | |
542 | } | |
543 | ||
82f4bac4 AW |
544 | static void |
545 | vm_error_wrong_number_of_values (scm_t_uint32 expected) | |
546 | { | |
547 | vm_error ("Wrong number of values returned to continuation (expected ~a)", | |
548 | scm_from_uint32 (expected)); | |
549 | } | |
550 | ||
53bdfcf0 AW |
551 | static void |
552 | vm_error_continuation_not_rewindable (SCM cont) | |
553 | { | |
554 | vm_error ("Unrewindable partial continuation", cont); | |
555 | } | |
556 | ||
557 | static void | |
558 | vm_error_bad_wide_string_length (size_t len) | |
559 | { | |
560 | vm_error ("VM: Bad wide string length: ~S", scm_from_size_t (len)); | |
561 | } | |
562 | ||
53bdfcf0 AW |
563 | |
564 | \f | |
28b119ee | 565 | |
ef6b7f71 | 566 | static SCM vm_boot_continuation; |
486013d6 AW |
567 | static SCM vm_builtin_apply; |
568 | static SCM vm_builtin_values; | |
569 | static SCM vm_builtin_abort_to_prompt; | |
570 | static SCM vm_builtin_call_with_values; | |
571 | static SCM vm_builtin_call_with_current_continuation; | |
510ca126 | 572 | |
ef6b7f71 | 573 | static const scm_t_uint32 vm_boot_continuation_code[] = { |
095100bb | 574 | SCM_PACK_OP_24 (halt, 0) |
510ca126 AW |
575 | }; |
576 | ||
486013d6 | 577 | static const scm_t_uint32 vm_builtin_apply_code[] = { |
095100bb AW |
578 | SCM_PACK_OP_24 (assert_nargs_ge, 3), |
579 | SCM_PACK_OP_24 (tail_apply, 0), /* proc in r1, args from r2 */ | |
510ca126 AW |
580 | }; |
581 | ||
486013d6 | 582 | static const scm_t_uint32 vm_builtin_values_code[] = { |
095100bb | 583 | SCM_PACK_OP_24 (return_values, 0) /* vals from r1 */ |
510ca126 AW |
584 | }; |
585 | ||
486013d6 | 586 | static const scm_t_uint32 vm_builtin_abort_to_prompt_code[] = { |
095100bb AW |
587 | SCM_PACK_OP_24 (assert_nargs_ge, 2), |
588 | SCM_PACK_OP_24 (abort, 0), /* tag in r1, vals from r2 */ | |
486013d6 | 589 | /* FIXME: Partial continuation should capture caller regs. */ |
095100bb | 590 | SCM_PACK_OP_24 (return_values, 0) /* vals from r1 */ |
486013d6 AW |
591 | }; |
592 | ||
593 | static const scm_t_uint32 vm_builtin_call_with_values_code[] = { | |
095100bb AW |
594 | SCM_PACK_OP_24 (assert_nargs_ee, 3), |
595 | SCM_PACK_OP_24 (alloc_frame, 7), | |
596 | SCM_PACK_OP_12_12 (mov, 6, 1), | |
597 | SCM_PACK_OP_24 (call, 6), SCM_PACK_OP_ARG_8_24 (0, 1), | |
598 | SCM_PACK_OP_12_12 (mov, 0, 2), | |
599 | SCM_PACK_OP_24 (tail_call_shuffle, 7) | |
486013d6 AW |
600 | }; |
601 | ||
602 | static const scm_t_uint32 vm_builtin_call_with_current_continuation_code[] = { | |
095100bb AW |
603 | SCM_PACK_OP_24 (assert_nargs_ee, 2), |
604 | SCM_PACK_OP_24 (call_cc, 0) | |
486013d6 AW |
605 | }; |
606 | ||
607 | ||
608 | static SCM | |
609 | scm_vm_builtin_ref (unsigned idx) | |
610 | { | |
611 | switch (idx) | |
612 | { | |
9f309e2c | 613 | #define INDEX_TO_NAME(builtin, BUILTIN, req, opt, rest) \ |
486013d6 AW |
614 | case SCM_VM_BUILTIN_##BUILTIN: return vm_builtin_##builtin; |
615 | FOR_EACH_VM_BUILTIN(INDEX_TO_NAME) | |
616 | #undef INDEX_TO_NAME | |
617 | default: abort(); | |
618 | } | |
619 | } | |
620 | ||
9f309e2c | 621 | SCM scm_sym_apply; |
486013d6 AW |
622 | static SCM scm_sym_values; |
623 | static SCM scm_sym_abort_to_prompt; | |
624 | static SCM scm_sym_call_with_values; | |
625 | static SCM scm_sym_call_with_current_continuation; | |
626 | ||
627 | SCM | |
628 | scm_vm_builtin_name_to_index (SCM name) | |
629 | #define FUNC_NAME "builtin-name->index" | |
630 | { | |
631 | SCM_VALIDATE_SYMBOL (1, name); | |
632 | ||
9f309e2c | 633 | #define NAME_TO_INDEX(builtin, BUILTIN, req, opt, rest) \ |
486013d6 AW |
634 | if (scm_is_eq (name, scm_sym_##builtin)) \ |
635 | return scm_from_uint (SCM_VM_BUILTIN_##BUILTIN); | |
636 | FOR_EACH_VM_BUILTIN(NAME_TO_INDEX) | |
637 | #undef NAME_TO_INDEX | |
638 | ||
639 | return SCM_BOOL_F; | |
640 | } | |
641 | #undef FUNC_NAME | |
642 | ||
643 | SCM | |
644 | scm_vm_builtin_index_to_name (SCM index) | |
645 | #define FUNC_NAME "builtin-index->name" | |
646 | { | |
647 | unsigned idx; | |
648 | ||
649 | SCM_VALIDATE_UINT_COPY (1, index, idx); | |
650 | ||
651 | switch (idx) | |
652 | { | |
9f309e2c | 653 | #define INDEX_TO_NAME(builtin, BUILTIN, req, opt, rest) \ |
486013d6 AW |
654 | case SCM_VM_BUILTIN_##BUILTIN: return scm_sym_##builtin; |
655 | FOR_EACH_VM_BUILTIN(INDEX_TO_NAME) | |
656 | #undef INDEX_TO_NAME | |
657 | default: return SCM_BOOL_F; | |
658 | } | |
659 | } | |
660 | #undef FUNC_NAME | |
661 | ||
662 | static void | |
663 | scm_init_vm_builtins (void) | |
664 | { | |
486013d6 AW |
665 | scm_c_define_gsubr ("builtin-name->index", 1, 0, 0, |
666 | scm_vm_builtin_name_to_index); | |
667 | scm_c_define_gsubr ("builtin-index->name", 1, 0, 0, | |
668 | scm_vm_builtin_index_to_name); | |
669 | } | |
670 | ||
671 | SCM | |
672 | scm_i_call_with_current_continuation (SCM proc) | |
673 | { | |
674 | return scm_call_1 (vm_builtin_call_with_current_continuation, proc); | |
675 | } | |
510ca126 | 676 | |
a98cef7e KN |
677 | \f |
678 | /* | |
679 | * VM | |
680 | */ | |
681 | ||
b7393ea1 | 682 | static SCM |
b782ed01 | 683 | resolve_variable (SCM what, SCM module) |
b7393ea1 | 684 | { |
9bd48cb1 | 685 | if (SCM_LIKELY (scm_is_symbol (what))) |
b7393ea1 | 686 | { |
b782ed01 AW |
687 | if (scm_is_true (module)) |
688 | return scm_module_lookup (module, what); | |
b7393ea1 | 689 | else |
62e15979 | 690 | return scm_module_lookup (scm_the_root_module (), what); |
b7393ea1 AW |
691 | } |
692 | else | |
693 | { | |
b782ed01 AW |
694 | SCM modname, sym, public; |
695 | ||
696 | modname = SCM_CAR (what); | |
697 | sym = SCM_CADR (what); | |
698 | public = SCM_CADDR (what); | |
699 | ||
d6fbf0c0 AW |
700 | if (!scm_module_system_booted_p) |
701 | { | |
702 | #ifdef VM_ENABLE_PARANOID_ASSERTIONS | |
703 | ASSERT (scm_is_false (public)); | |
704 | ASSERT (scm_is_true | |
705 | (scm_equal_p (modname, | |
706 | scm_list_1 (scm_from_utf8_symbol ("guile"))))); | |
707 | #endif | |
708 | return scm_lookup (sym); | |
709 | } | |
710 | else if (scm_is_true (public)) | |
b782ed01 AW |
711 | return scm_public_lookup (modname, sym); |
712 | else | |
713 | return scm_private_lookup (modname, sym); | |
b7393ea1 AW |
714 | } |
715 | } | |
716 | ||
aab9d46c | 717 | #define VM_MIN_STACK_SIZE (1024) |
486013d6 | 718 | #define VM_DEFAULT_STACK_SIZE (256 * 1024) |
aab9d46c SIT |
719 | static size_t vm_stack_size = VM_DEFAULT_STACK_SIZE; |
720 | ||
721 | static void | |
722 | initialize_default_stack_size (void) | |
723 | { | |
724 | int size = scm_getenv_int ("GUILE_STACK_SIZE", vm_stack_size); | |
725 | if (size >= VM_MIN_STACK_SIZE) | |
726 | vm_stack_size = size; | |
727 | } | |
17e90c5e | 728 | |
f42cfbf0 AW |
729 | #define VM_NAME vm_regular_engine |
730 | #define VM_USE_HOOKS 0 | |
6d14383e | 731 | #define FUNC_NAME "vm-regular-engine" |
83495480 | 732 | #include "vm-engine.c" |
6d14383e | 733 | #undef FUNC_NAME |
f42cfbf0 AW |
734 | #undef VM_USE_HOOKS |
735 | #undef VM_NAME | |
17e90c5e | 736 | |
f42cfbf0 AW |
737 | #define VM_NAME vm_debug_engine |
738 | #define VM_USE_HOOKS 1 | |
6d14383e | 739 | #define FUNC_NAME "vm-debug-engine" |
83495480 | 740 | #include "vm-engine.c" |
6d14383e | 741 | #undef FUNC_NAME |
f42cfbf0 AW |
742 | #undef VM_USE_HOOKS |
743 | #undef VM_NAME | |
17e90c5e | 744 | |
f42cfbf0 | 745 | typedef SCM (*scm_t_vm_engine) (SCM vm, SCM program, SCM *argv, size_t nargs); |
73c3db66 | 746 | |
f42cfbf0 AW |
747 | static const scm_t_vm_engine vm_engines[SCM_VM_NUM_ENGINES] = |
748 | { vm_regular_engine, vm_debug_engine }; | |
73c3db66 | 749 | |
e3eb628d LC |
750 | #ifdef VM_ENABLE_PRECISE_STACK_GC_SCAN |
751 | ||
752 | /* The GC "kind" for the VM stack. */ | |
753 | static int vm_stack_gc_kind; | |
754 | ||
755 | #endif | |
756 | ||
a98cef7e | 757 | static SCM |
17e90c5e KN |
758 | make_vm (void) |
759 | #define FUNC_NAME "make_vm" | |
a98cef7e | 760 | { |
17e90c5e | 761 | int i; |
7f991c7d | 762 | struct scm_vm *vp; |
747a1635 | 763 | |
7f991c7d | 764 | vp = scm_gc_malloc (sizeof (struct scm_vm), "vm"); |
d8eeb67c | 765 | |
aab9d46c | 766 | vp->stack_size= vm_stack_size; |
e3eb628d LC |
767 | |
768 | #ifdef VM_ENABLE_PRECISE_STACK_GC_SCAN | |
4168aa46 TTN |
769 | vp->stack_base = (SCM *) |
770 | GC_generic_malloc (vp->stack_size * sizeof (SCM), vm_stack_gc_kind); | |
e3eb628d LC |
771 | |
772 | /* Keep a pointer to VP so that `vm_stack_mark ()' can know what the stack | |
773 | top is. */ | |
21041372 | 774 | *vp->stack_base = SCM_PACK_POINTER (vp); |
e3eb628d LC |
775 | vp->stack_base++; |
776 | vp->stack_size--; | |
777 | #else | |
d8eeb67c LC |
778 | vp->stack_base = scm_gc_malloc (vp->stack_size * sizeof (SCM), |
779 | "stack-base"); | |
e3eb628d LC |
780 | #endif |
781 | ||
f1046e6b | 782 | vp->stack_limit = vp->stack_base + vp->stack_size - VM_STACK_RESERVE_SIZE; |
3616e9e9 KN |
783 | vp->ip = NULL; |
784 | vp->sp = vp->stack_base - 1; | |
785 | vp->fp = NULL; | |
ea9f4f4b | 786 | vp->engine = vm_default_engine; |
7656f194 | 787 | vp->trace_level = 0; |
17e90c5e | 788 | for (i = 0; i < SCM_VM_NUM_HOOKS; i++) |
3d5ee0cd | 789 | vp->hooks[i] = SCM_BOOL_F; |
6f3b0cc2 | 790 | return scm_cell (scm_tc7_vm, (scm_t_bits)vp); |
a98cef7e | 791 | } |
17e90c5e | 792 | #undef FUNC_NAME |
a98cef7e | 793 | |
e3eb628d LC |
794 | #ifdef VM_ENABLE_PRECISE_STACK_GC_SCAN |
795 | ||
796 | /* Mark the VM stack region between its base and its current top. */ | |
797 | static struct GC_ms_entry * | |
798 | vm_stack_mark (GC_word *addr, struct GC_ms_entry *mark_stack_ptr, | |
799 | struct GC_ms_entry *mark_stack_limit, GC_word env) | |
800 | { | |
801 | GC_word *word; | |
802 | const struct scm_vm *vm; | |
803 | ||
804 | /* The first word of the VM stack should contain a pointer to the | |
805 | corresponding VM. */ | |
806 | vm = * ((struct scm_vm **) addr); | |
807 | ||
8071c490 | 808 | if (vm == NULL |
f1046e6b | 809 | || (SCM *) addr != vm->stack_base - 1) |
e3eb628d LC |
810 | /* ADDR must be a pointer to a free-list element, which we must ignore |
811 | (see warning in <gc/gc_mark.h>). */ | |
812 | return mark_stack_ptr; | |
813 | ||
e3eb628d LC |
814 | for (word = (GC_word *) vm->stack_base; word <= (GC_word *) vm->sp; word++) |
815 | mark_stack_ptr = GC_MARK_AND_PUSH ((* (GC_word **) word), | |
816 | mark_stack_ptr, mark_stack_limit, | |
817 | NULL); | |
818 | ||
819 | return mark_stack_ptr; | |
820 | } | |
821 | ||
822 | #endif /* VM_ENABLE_PRECISE_STACK_GC_SCAN */ | |
823 | ||
824 | ||
6d14383e | 825 | SCM |
4abef68f | 826 | scm_c_vm_run (SCM vm, SCM program, SCM *argv, int nargs) |
6d14383e | 827 | { |
4abef68f | 828 | struct scm_vm *vp = SCM_VM_DATA (vm); |
b95d76fc | 829 | SCM_CHECK_STACK; |
f42cfbf0 | 830 | return vm_engines[vp->engine](vm, program, argv, nargs); |
6d14383e AW |
831 | } |
832 | ||
a98cef7e KN |
833 | /* Scheme interface */ |
834 | ||
271c3d31 LC |
835 | SCM_DEFINE (scm_the_vm, "the-vm", 0, 0, 0, |
836 | (void), | |
837 | "Return the current thread's VM.") | |
838 | #define FUNC_NAME s_scm_the_vm | |
839 | { | |
ea9f4f4b AW |
840 | scm_i_thread *t = SCM_I_CURRENT_THREAD; |
841 | ||
842 | if (SCM_UNLIKELY (scm_is_false (t->vm))) | |
843 | t->vm = make_vm (); | |
844 | ||
845 | return t->vm; | |
271c3d31 | 846 | } |
499a4c07 KN |
847 | #undef FUNC_NAME |
848 | ||
849 | ||
a98cef7e KN |
850 | SCM_DEFINE (scm_vm_p, "vm?", 1, 0, 0, |
851 | (SCM obj), | |
17e90c5e | 852 | "") |
a98cef7e KN |
853 | #define FUNC_NAME s_scm_vm_p |
854 | { | |
9bd48cb1 | 855 | return scm_from_bool (SCM_VM_P (obj)); |
a98cef7e KN |
856 | } |
857 | #undef FUNC_NAME | |
858 | ||
859 | SCM_DEFINE (scm_make_vm, "make-vm", 0, 0, 0, | |
17e90c5e KN |
860 | (void), |
861 | "") | |
862 | #define FUNC_NAME s_scm_make_vm, | |
a98cef7e | 863 | { |
17e90c5e | 864 | return make_vm (); |
a98cef7e KN |
865 | } |
866 | #undef FUNC_NAME | |
867 | ||
17e90c5e | 868 | SCM_DEFINE (scm_vm_ip, "vm:ip", 1, 0, 0, |
a98cef7e | 869 | (SCM vm), |
17e90c5e KN |
870 | "") |
871 | #define FUNC_NAME s_scm_vm_ip | |
a98cef7e KN |
872 | { |
873 | SCM_VALIDATE_VM (1, vm); | |
3d27ef4b | 874 | return scm_from_unsigned_integer ((scm_t_bits) SCM_VM_DATA (vm)->ip); |
a98cef7e KN |
875 | } |
876 | #undef FUNC_NAME | |
877 | ||
878 | SCM_DEFINE (scm_vm_sp, "vm:sp", 1, 0, 0, | |
879 | (SCM vm), | |
17e90c5e | 880 | "") |
a98cef7e KN |
881 | #define FUNC_NAME s_scm_vm_sp |
882 | { | |
883 | SCM_VALIDATE_VM (1, vm); | |
3d27ef4b | 884 | return scm_from_unsigned_integer ((scm_t_bits) SCM_VM_DATA (vm)->sp); |
a98cef7e KN |
885 | } |
886 | #undef FUNC_NAME | |
887 | ||
888 | SCM_DEFINE (scm_vm_fp, "vm:fp", 1, 0, 0, | |
889 | (SCM vm), | |
17e90c5e | 890 | "") |
a98cef7e KN |
891 | #define FUNC_NAME s_scm_vm_fp |
892 | { | |
893 | SCM_VALIDATE_VM (1, vm); | |
3d27ef4b | 894 | return scm_from_unsigned_integer ((scm_t_bits) SCM_VM_DATA (vm)->fp); |
a98cef7e KN |
895 | } |
896 | #undef FUNC_NAME | |
897 | ||
17e90c5e KN |
898 | #define VM_DEFINE_HOOK(n) \ |
899 | { \ | |
3d5ee0cd | 900 | struct scm_vm *vp; \ |
17e90c5e | 901 | SCM_VALIDATE_VM (1, vm); \ |
3d5ee0cd | 902 | vp = SCM_VM_DATA (vm); \ |
8b22ed7a | 903 | if (scm_is_false (vp->hooks[n])) \ |
238e7a11 | 904 | vp->hooks[n] = scm_make_hook (SCM_I_MAKINUM (1)); \ |
3d5ee0cd | 905 | return vp->hooks[n]; \ |
17e90c5e KN |
906 | } |
907 | ||
c45d4d77 | 908 | SCM_DEFINE (scm_vm_apply_hook, "vm-apply-hook", 1, 0, 0, |
17e90c5e KN |
909 | (SCM vm), |
910 | "") | |
c45d4d77 | 911 | #define FUNC_NAME s_scm_vm_apply_hook |
a98cef7e | 912 | { |
c45d4d77 | 913 | VM_DEFINE_HOOK (SCM_VM_APPLY_HOOK); |
a98cef7e KN |
914 | } |
915 | #undef FUNC_NAME | |
916 | ||
c45d4d77 | 917 | SCM_DEFINE (scm_vm_push_continuation_hook, "vm-push-continuation-hook", 1, 0, 0, |
17e90c5e KN |
918 | (SCM vm), |
919 | "") | |
c45d4d77 | 920 | #define FUNC_NAME s_scm_vm_push_continuation_hook |
a98cef7e | 921 | { |
c45d4d77 | 922 | VM_DEFINE_HOOK (SCM_VM_PUSH_CONTINUATION_HOOK); |
a98cef7e KN |
923 | } |
924 | #undef FUNC_NAME | |
925 | ||
c45d4d77 | 926 | SCM_DEFINE (scm_vm_pop_continuation_hook, "vm-pop-continuation-hook", 1, 0, 0, |
a98cef7e | 927 | (SCM vm), |
17e90c5e | 928 | "") |
c45d4d77 | 929 | #define FUNC_NAME s_scm_vm_pop_continuation_hook |
a98cef7e | 930 | { |
c45d4d77 | 931 | VM_DEFINE_HOOK (SCM_VM_POP_CONTINUATION_HOOK); |
a98cef7e KN |
932 | } |
933 | #undef FUNC_NAME | |
934 | ||
c45d4d77 | 935 | SCM_DEFINE (scm_vm_next_hook, "vm-next-hook", 1, 0, 0, |
a98cef7e | 936 | (SCM vm), |
17e90c5e | 937 | "") |
c45d4d77 | 938 | #define FUNC_NAME s_scm_vm_next_hook |
a98cef7e | 939 | { |
c45d4d77 | 940 | VM_DEFINE_HOOK (SCM_VM_NEXT_HOOK); |
a98cef7e KN |
941 | } |
942 | #undef FUNC_NAME | |
f3120251 AW |
943 | |
944 | SCM_DEFINE (scm_vm_abort_continuation_hook, "vm-abort-continuation-hook", 1, 0, 0, | |
945 | (SCM vm), | |
946 | "") | |
947 | #define FUNC_NAME s_scm_vm_abort_continuation_hook | |
948 | { | |
949 | VM_DEFINE_HOOK (SCM_VM_ABORT_CONTINUATION_HOOK); | |
950 | } | |
951 | #undef FUNC_NAME | |
952 | ||
953 | SCM_DEFINE (scm_vm_restore_continuation_hook, "vm-restore-continuation-hook", 1, 0, 0, | |
954 | (SCM vm), | |
955 | "") | |
956 | #define FUNC_NAME s_scm_vm_restore_continuation_hook | |
957 | { | |
958 | VM_DEFINE_HOOK (SCM_VM_RESTORE_CONTINUATION_HOOK); | |
959 | } | |
960 | #undef FUNC_NAME | |
a98cef7e | 961 | |
7656f194 | 962 | SCM_DEFINE (scm_vm_trace_level, "vm-trace-level", 1, 0, 0, |
17e90c5e KN |
963 | (SCM vm), |
964 | "") | |
7656f194 | 965 | #define FUNC_NAME s_scm_vm_trace_level |
a98cef7e | 966 | { |
a98cef7e | 967 | SCM_VALIDATE_VM (1, vm); |
7656f194 AW |
968 | return scm_from_int (SCM_VM_DATA (vm)->trace_level); |
969 | } | |
970 | #undef FUNC_NAME | |
971 | ||
972 | SCM_DEFINE (scm_set_vm_trace_level_x, "set-vm-trace-level!", 2, 0, 0, | |
973 | (SCM vm, SCM level), | |
974 | "") | |
975 | #define FUNC_NAME s_scm_set_vm_trace_level_x | |
976 | { | |
977 | SCM_VALIDATE_VM (1, vm); | |
978 | SCM_VM_DATA (vm)->trace_level = scm_to_int (level); | |
979 | return SCM_UNSPECIFIED; | |
a98cef7e KN |
980 | } |
981 | #undef FUNC_NAME | |
982 | ||
983 | \f | |
ea9f4f4b AW |
984 | /* |
985 | * VM engines | |
986 | */ | |
987 | ||
988 | static int | |
989 | symbol_to_vm_engine (SCM engine, const char *FUNC_NAME) | |
990 | { | |
991 | if (scm_is_eq (engine, sym_regular)) | |
992 | return SCM_VM_REGULAR_ENGINE; | |
993 | else if (scm_is_eq (engine, sym_debug)) | |
994 | return SCM_VM_DEBUG_ENGINE; | |
995 | else | |
996 | SCM_MISC_ERROR ("Unknown VM engine: ~a", scm_list_1 (engine)); | |
997 | } | |
998 | ||
999 | static SCM | |
1000 | vm_engine_to_symbol (int engine, const char *FUNC_NAME) | |
1001 | { | |
1002 | switch (engine) | |
1003 | { | |
1004 | case SCM_VM_REGULAR_ENGINE: | |
1005 | return sym_regular; | |
1006 | case SCM_VM_DEBUG_ENGINE: | |
1007 | return sym_debug; | |
1008 | default: | |
1009 | /* ? */ | |
1010 | SCM_MISC_ERROR ("Unknown VM engine: ~a", | |
1011 | scm_list_1 (scm_from_int (engine))); | |
1012 | } | |
1013 | } | |
1014 | ||
ea9f4f4b AW |
1015 | SCM_DEFINE (scm_vm_engine, "vm-engine", 1, 0, 0, |
1016 | (SCM vm), | |
1017 | "") | |
1018 | #define FUNC_NAME s_scm_vm_engine | |
1019 | { | |
1020 | SCM_VALIDATE_VM (1, vm); | |
1021 | return vm_engine_to_symbol (SCM_VM_DATA (vm)->engine, FUNC_NAME); | |
1022 | } | |
1023 | #undef FUNC_NAME | |
1024 | ||
1025 | void | |
1026 | scm_c_set_vm_engine_x (SCM vm, int engine) | |
1027 | #define FUNC_NAME "set-vm-engine!" | |
1028 | { | |
1029 | SCM_VALIDATE_VM (1, vm); | |
1030 | ||
ea9f4f4b AW |
1031 | if (engine < 0 || engine >= SCM_VM_NUM_ENGINES) |
1032 | SCM_MISC_ERROR ("Unknown VM engine: ~a", | |
1033 | scm_list_1 (scm_from_int (engine))); | |
1034 | ||
1035 | SCM_VM_DATA (vm)->engine = engine; | |
1036 | } | |
1037 | #undef FUNC_NAME | |
1038 | ||
1039 | SCM_DEFINE (scm_set_vm_engine_x, "set-vm-engine!", 2, 0, 0, | |
1040 | (SCM vm, SCM engine), | |
1041 | "") | |
1042 | #define FUNC_NAME s_scm_set_vm_engine_x | |
1043 | { | |
1044 | scm_c_set_vm_engine_x (vm, symbol_to_vm_engine (engine, FUNC_NAME)); | |
1045 | return SCM_UNSPECIFIED; | |
1046 | } | |
1047 | #undef FUNC_NAME | |
1048 | ||
1049 | void | |
1050 | scm_c_set_default_vm_engine_x (int engine) | |
1051 | #define FUNC_NAME "set-default-vm-engine!" | |
1052 | { | |
1053 | if (engine < 0 || engine >= SCM_VM_NUM_ENGINES) | |
1054 | SCM_MISC_ERROR ("Unknown VM engine: ~a", | |
1055 | scm_list_1 (scm_from_int (engine))); | |
1056 | ||
1057 | vm_default_engine = engine; | |
1058 | } | |
1059 | #undef FUNC_NAME | |
1060 | ||
1061 | SCM_DEFINE (scm_set_default_vm_engine_x, "set-default-vm-engine!", 1, 0, 0, | |
1062 | (SCM engine), | |
1063 | "") | |
1064 | #define FUNC_NAME s_scm_set_default_vm_engine_x | |
1065 | { | |
1066 | scm_c_set_default_vm_engine_x (symbol_to_vm_engine (engine, FUNC_NAME)); | |
1067 | return SCM_UNSPECIFIED; | |
1068 | } | |
1069 | #undef FUNC_NAME | |
1070 | ||
1071 | static void reinstate_vm (SCM vm) | |
1072 | { | |
1073 | scm_i_thread *t = SCM_I_CURRENT_THREAD; | |
1074 | t->vm = vm; | |
1075 | } | |
1076 | ||
1077 | SCM_DEFINE (scm_call_with_vm, "call-with-vm", 2, 0, 1, | |
1078 | (SCM vm, SCM proc, SCM args), | |
1079 | "Apply @var{proc} to @var{args} in a dynamic extent in which\n" | |
1080 | "@var{vm} is the current VM.\n\n" | |
1081 | "As an implementation restriction, if @var{vm} is not the same\n" | |
1082 | "as the current thread's VM, continuations captured within the\n" | |
1083 | "call to @var{proc} may not be reinstated once control leaves\n" | |
1084 | "@var{proc}.") | |
1085 | #define FUNC_NAME s_scm_call_with_vm | |
1086 | { | |
1087 | SCM prev_vm, ret; | |
1088 | SCM *argv; | |
1089 | int i, nargs; | |
1090 | scm_t_wind_flags flags; | |
1091 | scm_i_thread *t = SCM_I_CURRENT_THREAD; | |
1092 | ||
1093 | SCM_VALIDATE_VM (1, vm); | |
1094 | SCM_VALIDATE_PROC (2, proc); | |
1095 | ||
1096 | nargs = scm_ilength (args); | |
1097 | if (SCM_UNLIKELY (nargs < 0)) | |
1098 | scm_wrong_type_arg_msg (FUNC_NAME, 3, args, "list"); | |
1099 | ||
1100 | argv = alloca (nargs * sizeof(SCM)); | |
1101 | for (i = 0; i < nargs; i++) | |
1102 | { | |
1103 | argv[i] = SCM_CAR (args); | |
1104 | args = SCM_CDR (args); | |
1105 | } | |
1106 | ||
1107 | prev_vm = t->vm; | |
1108 | ||
1109 | /* Reentry can happen via invokation of a saved continuation, but | |
1110 | continuations only save the state of the VM that they are in at | |
1111 | capture-time, which might be different from this one. So, in the | |
1112 | case that the VMs are different, set up a non-rewindable frame to | |
1113 | prevent reinstating an incomplete continuation. */ | |
1114 | flags = scm_is_eq (prev_vm, vm) ? 0 : SCM_F_WIND_EXPLICITLY; | |
1115 | if (flags) | |
1116 | { | |
1117 | scm_dynwind_begin (0); | |
1118 | scm_dynwind_unwind_handler_with_scm (reinstate_vm, prev_vm, flags); | |
1119 | t->vm = vm; | |
1120 | } | |
1121 | ||
1122 | ret = scm_c_vm_run (vm, proc, argv, nargs); | |
1123 | ||
1124 | if (flags) | |
1125 | scm_dynwind_end (); | |
1126 | ||
1127 | return ret; | |
1128 | } | |
1129 | #undef FUNC_NAME | |
1130 | ||
1131 | \f | |
a98cef7e | 1132 | /* |
17e90c5e | 1133 | * Initialize |
a98cef7e KN |
1134 | */ |
1135 | ||
07e56b27 AW |
1136 | SCM scm_load_compiled_with_vm (SCM file) |
1137 | { | |
b8bc86bc AW |
1138 | SCM program = scm_load_thunk_from_file (file); |
1139 | ||
4abef68f | 1140 | return scm_c_vm_run (scm_the_vm (), program, NULL, 0); |
07e56b27 AW |
1141 | } |
1142 | ||
67b699cc | 1143 | |
9f309e2c AW |
1144 | void |
1145 | scm_init_vm_builtin_properties (void) | |
1146 | { | |
1147 | /* FIXME: Seems hacky to do this here, but oh well :/ */ | |
1148 | scm_sym_apply = scm_from_utf8_symbol ("apply"); | |
1149 | scm_sym_values = scm_from_utf8_symbol ("values"); | |
1150 | scm_sym_abort_to_prompt = scm_from_utf8_symbol ("abort-to-prompt"); | |
1151 | scm_sym_call_with_values = scm_from_utf8_symbol ("call-with-values"); | |
1152 | scm_sym_call_with_current_continuation = | |
1153 | scm_from_utf8_symbol ("call-with-current-continuation"); | |
1154 | ||
1155 | #define INIT_BUILTIN(builtin, BUILTIN, req, opt, rest) \ | |
1156 | scm_set_procedure_property_x (vm_builtin_##builtin, scm_sym_name, \ | |
1157 | scm_sym_##builtin); \ | |
1158 | scm_set_procedure_minimum_arity_x (vm_builtin_##builtin, \ | |
1159 | SCM_I_MAKINUM (req), \ | |
1160 | SCM_I_MAKINUM (opt), \ | |
1161 | scm_from_bool (rest)); | |
1162 | FOR_EACH_VM_BUILTIN (INIT_BUILTIN); | |
1163 | #undef INIT_BUILTIN | |
1164 | } | |
1165 | ||
17e90c5e | 1166 | void |
07e56b27 | 1167 | scm_bootstrap_vm (void) |
17e90c5e | 1168 | { |
44602b08 AW |
1169 | scm_c_register_extension ("libguile-" SCM_EFFECTIVE_VERSION, |
1170 | "scm_init_vm", | |
60ae5ca2 | 1171 | (scm_t_extension_init_func)scm_init_vm, NULL); |
486013d6 AW |
1172 | scm_c_register_extension ("libguile-" SCM_EFFECTIVE_VERSION, |
1173 | "scm_init_vm_builtins", | |
1174 | (scm_t_extension_init_func)scm_init_vm_builtins, | |
1175 | NULL); | |
60ae5ca2 | 1176 | |
aab9d46c SIT |
1177 | initialize_default_stack_size (); |
1178 | ||
4a655e50 AW |
1179 | sym_vm_run = scm_from_latin1_symbol ("vm-run"); |
1180 | sym_vm_error = scm_from_latin1_symbol ("vm-error"); | |
1181 | sym_keyword_argument_error = scm_from_latin1_symbol ("keyword-argument-error"); | |
1182 | sym_regular = scm_from_latin1_symbol ("regular"); | |
1183 | sym_debug = scm_from_latin1_symbol ("debug"); | |
0404c97d | 1184 | |
ef6b7f71 AW |
1185 | vm_boot_continuation = scm_i_make_program (vm_boot_continuation_code); |
1186 | SCM_SET_CELL_WORD_0 (vm_boot_continuation, | |
1187 | (SCM_CELL_WORD_0 (vm_boot_continuation) | |
73c3db66 | 1188 | | SCM_F_PROGRAM_IS_BOOT)); |
9f309e2c AW |
1189 | |
1190 | #define DEFINE_BUILTIN(builtin, BUILTIN, req, opt, rest) \ | |
80797145 | 1191 | vm_builtin_##builtin = scm_i_make_program (vm_builtin_##builtin##_code); |
9f309e2c AW |
1192 | FOR_EACH_VM_BUILTIN (DEFINE_BUILTIN); |
1193 | #undef DEFINE_BUILTIN | |
73c3db66 | 1194 | |
e3eb628d LC |
1195 | #ifdef VM_ENABLE_PRECISE_STACK_GC_SCAN |
1196 | vm_stack_gc_kind = | |
1197 | GC_new_kind (GC_new_free_list (), | |
1198 | GC_MAKE_PROC (GC_new_proc (vm_stack_mark), 0), | |
1199 | 0, 1); | |
1200 | ||
1201 | #endif | |
07e56b27 AW |
1202 | } |
1203 | ||
1204 | void | |
1205 | scm_init_vm (void) | |
1206 | { | |
17e90c5e | 1207 | #ifndef SCM_MAGIC_SNARFER |
aeeff258 | 1208 | #include "libguile/vm.x" |
17e90c5e | 1209 | #endif |
a98cef7e | 1210 | } |
17e90c5e KN |
1211 | |
1212 | /* | |
1213 | Local Variables: | |
1214 | c-file-style: "gnu" | |
1215 | End: | |
1216 | */ |