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" |
8f5cfc81 | 36 | #include "objcodes.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 | ||
57 | /* We can add a mode that ensures that all stack items above the stack pointer | |
58 | are NULL. This is useful for checking the internal consistency of the VM's | |
59 | assumptions and its operators, but isn't necessary for normal operation. It | |
616167fc | 60 | will ensure that assertions are enabled. Slows down the VM by about 30%. */ |
747a1635 | 61 | /* NB! If you enable this, search for NULLING in throw.c */ |
616167fc | 62 | /* #define VM_ENABLE_STACK_NULLING */ |
11ea1aba | 63 | |
53e28ed9 AW |
64 | /* #define VM_ENABLE_PARANOID_ASSERTIONS */ |
65 | ||
11ea1aba AW |
66 | #if defined (VM_ENABLE_STACK_NULLING) && !defined (VM_ENABLE_ASSERTIONS) |
67 | #define VM_ENABLE_ASSERTIONS | |
68 | #endif | |
69 | ||
e3eb628d LC |
70 | /* When defined, arrange so that the GC doesn't scan the VM stack beyond its |
71 | current SP. This should help avoid excess data retention. See | |
72 | http://thread.gmane.org/gmane.comp.programming.garbage-collection.boehmgc/3001 | |
73 | for a discussion. */ | |
74 | #define VM_ENABLE_PRECISE_STACK_GC_SCAN | |
75 | ||
f1046e6b LC |
76 | /* Size in SCM objects of the stack reserve. The reserve is used to run |
77 | exception handling code in case of a VM stack overflow. */ | |
78 | #define VM_STACK_RESERVE_SIZE 512 | |
79 | ||
e3eb628d | 80 | |
a98cef7e | 81 | \f |
a98cef7e KN |
82 | /* |
83 | * VM Continuation | |
84 | */ | |
85 | ||
6f3b0cc2 AW |
86 | void |
87 | scm_i_vm_cont_print (SCM x, SCM port, scm_print_state *pstate) | |
88 | { | |
0607ebbf | 89 | scm_puts_unlocked ("#<vm-continuation ", port); |
6f3b0cc2 | 90 | scm_uintprint (SCM_UNPACK (x), 16, port); |
0607ebbf | 91 | scm_puts_unlocked (">", port); |
6f3b0cc2 | 92 | } |
17e90c5e | 93 | |
d8873dfe AW |
94 | /* In theory, a number of vm instances can be active in the call trace, and we |
95 | only want to reify the continuations of those in the current continuation | |
96 | root. I don't see a nice way to do this -- ideally it would involve dynwinds, | |
97 | and previous values of the *the-vm* fluid within the current continuation | |
98 | root. But we don't have access to continuation roots in the dynwind stack. | |
99 | So, just punt for now, we just capture the continuation for the current VM. | |
100 | ||
101 | While I'm on the topic, ideally we could avoid copying the C stack if the | |
102 | continuation root is inside VM code, and call/cc was invoked within that same | |
103 | call to vm_run; but that's currently not implemented. | |
104 | */ | |
cee1d22c | 105 | SCM |
9121d9f1 | 106 | scm_i_vm_capture_stack (SCM *stack_base, SCM *fp, SCM *sp, scm_t_uint32 *ra, |
840ec334 | 107 | scm_t_dynstack *dynstack, scm_t_uint32 flags) |
a98cef7e | 108 | { |
d8873dfe AW |
109 | struct scm_vm_cont *p; |
110 | ||
111 | p = scm_gc_malloc (sizeof (*p), "capture_vm_cont"); | |
112 | p->stack_size = sp - stack_base + 1; | |
d8eeb67c LC |
113 | p->stack_base = scm_gc_malloc (p->stack_size * sizeof (SCM), |
114 | "capture_vm_cont"); | |
d8873dfe AW |
115 | #if defined(VM_ENABLE_STACK_NULLING) && 0 |
116 | /* Tail continuations leave their frame on the stack for subsequent | |
117 | application, but don't capture the frame -- so there are some elements on | |
118 | the stack then, and this check doesn't work, so disable it for now. */ | |
119 | if (sp >= vp->stack_base) | |
66db076a AW |
120 | if (!vp->sp[0] || vp->sp[1]) |
121 | abort (); | |
11ea1aba AW |
122 | memset (p->stack_base, 0, p->stack_size * sizeof (SCM)); |
123 | #endif | |
d8873dfe | 124 | p->ra = ra; |
d8873dfe AW |
125 | p->sp = sp; |
126 | p->fp = fp; | |
127 | memcpy (p->stack_base, stack_base, (sp + 1 - stack_base) * sizeof (SCM)); | |
128 | p->reloc = p->stack_base - stack_base; | |
9ede013f | 129 | p->dynstack = dynstack; |
cee1d22c | 130 | p->flags = flags; |
6f3b0cc2 | 131 | return scm_cell (scm_tc7_vm_cont, (scm_t_bits)p); |
a98cef7e KN |
132 | } |
133 | ||
134 | static void | |
d8873dfe | 135 | vm_return_to_continuation (SCM vm, SCM cont, size_t n, SCM *argv) |
a98cef7e | 136 | { |
d8873dfe AW |
137 | struct scm_vm *vp; |
138 | struct scm_vm_cont *cp; | |
139 | SCM *argv_copy; | |
140 | ||
141 | argv_copy = alloca (n * sizeof(SCM)); | |
142 | memcpy (argv_copy, argv, n * sizeof(SCM)); | |
143 | ||
144 | vp = SCM_VM_DATA (vm); | |
145 | cp = SCM_VM_CONT_DATA (cont); | |
146 | ||
f8085163 | 147 | if (vp->stack_size < cp->stack_size + n + 3) |
29366989 AW |
148 | scm_misc_error ("vm-engine", "not enough space to reinstate continuation", |
149 | scm_list_2 (vm, cont)); | |
150 | ||
11ea1aba AW |
151 | #ifdef VM_ENABLE_STACK_NULLING |
152 | { | |
d8873dfe | 153 | scm_t_ptrdiff nzero = (vp->sp - cp->sp); |
11ea1aba | 154 | if (nzero > 0) |
d8873dfe | 155 | memset (vp->stack_base + cp->stack_size, 0, nzero * sizeof (SCM)); |
66db076a AW |
156 | /* actually nzero should always be negative, because vm_reset_stack will |
157 | unwind the stack to some point *below* this continuation */ | |
11ea1aba AW |
158 | } |
159 | #endif | |
d8873dfe AW |
160 | vp->sp = cp->sp; |
161 | vp->fp = cp->fp; | |
162 | memcpy (vp->stack_base, cp->stack_base, cp->stack_size * sizeof (SCM)); | |
bfffd258 | 163 | |
03f16599 AW |
164 | { |
165 | size_t i; | |
166 | ||
167 | /* Push on an empty frame, as the continuation expects. */ | |
f8085163 | 168 | for (i = 0; i < 3; i++) |
03f16599 AW |
169 | { |
170 | vp->sp++; | |
171 | *vp->sp = SCM_BOOL_F; | |
172 | } | |
173 | ||
174 | /* Push the return values. */ | |
175 | for (i = 0; i < n; i++) | |
176 | { | |
177 | vp->sp++; | |
178 | *vp->sp = argv_copy[i]; | |
179 | } | |
840ec334 | 180 | vp->ip = cp->ra; |
03f16599 | 181 | } |
d8873dfe | 182 | } |
bfffd258 | 183 | |
bfffd258 | 184 | SCM |
9ede013f | 185 | scm_i_capture_current_stack (void) |
bfffd258 | 186 | { |
9ede013f AW |
187 | scm_i_thread *thread; |
188 | SCM vm; | |
189 | struct scm_vm *vp; | |
190 | ||
191 | thread = SCM_I_CURRENT_THREAD; | |
192 | vm = scm_the_vm (); | |
193 | vp = SCM_VM_DATA (vm); | |
194 | ||
840ec334 | 195 | return scm_i_vm_capture_stack (vp->stack_base, vp->fp, vp->sp, vp->ip, |
9ede013f AW |
196 | scm_dynstack_capture_all (&thread->dynstack), |
197 | 0); | |
a98cef7e KN |
198 | } |
199 | ||
c850a0ff AW |
200 | static void vm_dispatch_hook (SCM vm, int hook_num, |
201 | SCM *argv, int n) SCM_NOINLINE; | |
202 | ||
b1b942b7 | 203 | static void |
c850a0ff | 204 | vm_dispatch_hook (SCM vm, int hook_num, SCM *argv, int n) |
b1b942b7 | 205 | { |
7656f194 AW |
206 | struct scm_vm *vp; |
207 | SCM hook; | |
b3567435 | 208 | struct scm_frame c_frame; |
8e4c60ff | 209 | scm_t_cell *frame; |
893fb8d0 | 210 | int saved_trace_level; |
b1b942b7 | 211 | |
7656f194 AW |
212 | vp = SCM_VM_DATA (vm); |
213 | hook = vp->hooks[hook_num]; | |
b1b942b7 | 214 | |
7656f194 AW |
215 | if (SCM_LIKELY (scm_is_false (hook)) |
216 | || scm_is_null (SCM_HOOK_PROCEDURES (hook))) | |
217 | return; | |
b3567435 | 218 | |
893fb8d0 AW |
219 | saved_trace_level = vp->trace_level; |
220 | vp->trace_level = 0; | |
b3567435 LC |
221 | |
222 | /* Allocate a frame object on the stack. This is more efficient than calling | |
223 | `scm_c_make_frame ()' to allocate on the heap, but it forces hooks to not | |
224 | capture frame objects. | |
225 | ||
226 | At the same time, procedures such as `frame-procedure' make sense only | |
227 | while the stack frame represented by the frame object is visible, so it | |
228 | seems reasonable to limit the lifetime of frame objects. */ | |
229 | ||
230 | c_frame.stack_holder = vm; | |
231 | c_frame.fp = vp->fp; | |
232 | c_frame.sp = vp->sp; | |
233 | c_frame.ip = vp->ip; | |
234 | c_frame.offset = 0; | |
8e4c60ff LC |
235 | |
236 | /* Arrange for FRAME to be 8-byte aligned, like any other cell. */ | |
237 | frame = alloca (sizeof (*frame) + 8); | |
238 | frame = (scm_t_cell *) ROUND_UP ((scm_t_uintptr) frame, 8UL); | |
239 | ||
240 | frame->word_0 = SCM_PACK (scm_tc7_frame); | |
21041372 | 241 | frame->word_1 = SCM_PACK_POINTER (&c_frame); |
b3567435 | 242 | |
c850a0ff AW |
243 | if (n == 0) |
244 | { | |
245 | SCM args[1]; | |
246 | ||
247 | args[0] = SCM_PACK_POINTER (frame); | |
248 | scm_c_run_hookn (hook, args, 1); | |
249 | } | |
250 | else if (n == 1) | |
251 | { | |
252 | SCM args[2]; | |
253 | ||
254 | args[0] = SCM_PACK_POINTER (frame); | |
255 | args[1] = argv[0]; | |
256 | scm_c_run_hookn (hook, args, 2); | |
257 | } | |
258 | else | |
259 | { | |
260 | SCM args = SCM_EOL; | |
261 | ||
262 | while (n--) | |
263 | args = scm_cons (argv[n], args); | |
264 | scm_c_run_hook (hook, scm_cons (SCM_PACK_POINTER (frame), args)); | |
265 | } | |
b3567435 | 266 | |
893fb8d0 | 267 | vp->trace_level = saved_trace_level; |
b1b942b7 AW |
268 | } |
269 | ||
4f66bcde | 270 | static void |
99511cd0 AW |
271 | vm_abort (SCM vm, SCM tag, size_t nstack, SCM *stack_args, SCM tail, SCM *sp, |
272 | scm_i_jmp_buf *current_registers) SCM_NORETURN; | |
9d381ba4 AW |
273 | |
274 | static void | |
99511cd0 AW |
275 | vm_abort (SCM vm, SCM tag, size_t nstack, SCM *stack_args, SCM tail, SCM *sp, |
276 | scm_i_jmp_buf *current_registers) | |
4f66bcde | 277 | { |
eaefabee | 278 | size_t i; |
2d026f04 | 279 | ssize_t tail_len; |
99511cd0 | 280 | SCM *argv; |
eaefabee | 281 | |
2d026f04 AW |
282 | tail_len = scm_ilength (tail); |
283 | if (tail_len < 0) | |
29366989 AW |
284 | scm_misc_error ("vm-engine", "tail values to abort should be a list", |
285 | scm_list_1 (tail)); | |
286 | ||
99511cd0 AW |
287 | argv = alloca ((nstack + tail_len) * sizeof (SCM)); |
288 | for (i = 0; i < nstack; i++) | |
289 | argv[i] = stack_args[i]; | |
290 | for (; i < nstack + tail_len; i++, tail = scm_cdr (tail)) | |
2d026f04 | 291 | argv[i] = scm_car (tail); |
eaefabee | 292 | |
99511cd0 AW |
293 | /* FIXME: NULLSTACK (SCM_VM_DATA (vp)->sp - sp) */ |
294 | SCM_VM_DATA (vm)->sp = sp; | |
295 | ||
296 | scm_c_abort (vm, tag, nstack + tail_len, argv, current_registers); | |
cee1d22c AW |
297 | } |
298 | ||
9d381ba4 AW |
299 | static void |
300 | vm_reinstate_partial_continuation (SCM vm, SCM cont, size_t n, SCM *argv, | |
301 | scm_t_dynstack *dynstack, | |
302 | scm_i_jmp_buf *registers) | |
cee1d22c | 303 | { |
07801437 AW |
304 | struct scm_vm *vp; |
305 | struct scm_vm_cont *cp; | |
306 | SCM *argv_copy, *base; | |
9ede013f | 307 | scm_t_ptrdiff reloc; |
07801437 AW |
308 | size_t i; |
309 | ||
310 | argv_copy = alloca (n * sizeof(SCM)); | |
311 | memcpy (argv_copy, argv, n * sizeof(SCM)); | |
312 | ||
313 | vp = SCM_VM_DATA (vm); | |
314 | cp = SCM_VM_CONT_DATA (cont); | |
b636cdb0 | 315 | base = SCM_FRAME_LOCALS_ADDRESS (vp->fp); |
9ede013f | 316 | reloc = cp->reloc + (base - cp->stack_base); |
07801437 | 317 | |
0fc9040f | 318 | #define RELOC(scm_p) \ |
9ede013f | 319 | (((SCM *) (scm_p)) + reloc) |
07801437 AW |
320 | |
321 | if ((base - vp->stack_base) + cp->stack_size + n + 1 > vp->stack_size) | |
29366989 AW |
322 | scm_misc_error ("vm-engine", |
323 | "not enough space to instate partial continuation", | |
324 | scm_list_2 (vm, cont)); | |
07801437 AW |
325 | |
326 | memcpy (base, cp->stack_base, cp->stack_size * sizeof (SCM)); | |
327 | ||
328 | /* now relocate frame pointers */ | |
329 | { | |
330 | SCM *fp; | |
331 | for (fp = RELOC (cp->fp); | |
332 | SCM_FRAME_LOWER_ADDRESS (fp) > base; | |
333 | fp = SCM_FRAME_DYNAMIC_LINK (fp)) | |
334 | SCM_FRAME_SET_DYNAMIC_LINK (fp, RELOC (SCM_FRAME_DYNAMIC_LINK (fp))); | |
335 | } | |
336 | ||
337 | vp->sp = base - 1 + cp->stack_size; | |
338 | vp->fp = RELOC (cp->fp); | |
840ec334 | 339 | vp->ip = cp->ra; |
07801437 | 340 | |
840ec334 | 341 | /* Push the arguments. */ |
07801437 AW |
342 | for (i = 0; i < n; i++) |
343 | { | |
344 | vp->sp++; | |
345 | *vp->sp = argv_copy[i]; | |
346 | } | |
9a1c6f1f | 347 | |
9d381ba4 AW |
348 | /* The prompt captured a slice of the dynamic stack. Here we wind |
349 | those entries onto the current thread's stack. We also have to | |
350 | relocate any prompts that we see along the way. */ | |
351 | { | |
352 | scm_t_bits *walk; | |
353 | ||
354 | for (walk = SCM_DYNSTACK_FIRST (cp->dynstack); | |
355 | SCM_DYNSTACK_TAG (walk); | |
356 | walk = SCM_DYNSTACK_NEXT (walk)) | |
357 | { | |
358 | scm_t_bits tag = SCM_DYNSTACK_TAG (walk); | |
359 | ||
360 | if (SCM_DYNSTACK_TAG_TYPE (tag) == SCM_DYNSTACK_TYPE_PROMPT) | |
361 | scm_dynstack_wind_prompt (dynstack, walk, reloc, registers); | |
362 | else | |
363 | scm_dynstack_wind_1 (dynstack, walk); | |
364 | } | |
365 | } | |
adbdfd6d | 366 | #undef RELOC |
4f66bcde AW |
367 | } |
368 | ||
369 | \f | |
17e90c5e KN |
370 | /* |
371 | * VM Internal functions | |
372 | */ | |
373 | ||
6f3b0cc2 AW |
374 | void |
375 | scm_i_vm_print (SCM x, SCM port, scm_print_state *pstate) | |
376 | { | |
0a935b2a LC |
377 | const struct scm_vm *vm; |
378 | ||
379 | vm = SCM_VM_DATA (x); | |
380 | ||
0607ebbf | 381 | scm_puts_unlocked ("#<vm ", port); |
0a935b2a LC |
382 | switch (vm->engine) |
383 | { | |
384 | case SCM_VM_REGULAR_ENGINE: | |
0607ebbf | 385 | scm_puts_unlocked ("regular-engine ", port); |
0a935b2a LC |
386 | break; |
387 | ||
388 | case SCM_VM_DEBUG_ENGINE: | |
0607ebbf | 389 | scm_puts_unlocked ("debug-engine ", port); |
0a935b2a LC |
390 | break; |
391 | ||
392 | default: | |
0607ebbf | 393 | scm_puts_unlocked ("unknown-engine ", port); |
0a935b2a | 394 | } |
6f3b0cc2 | 395 | scm_uintprint (SCM_UNPACK (x), 16, port); |
0607ebbf | 396 | scm_puts_unlocked (">", port); |
6f3b0cc2 AW |
397 | } |
398 | ||
53bdfcf0 AW |
399 | \f |
400 | /* | |
401 | * VM Error Handling | |
402 | */ | |
403 | ||
404 | static void vm_error (const char *msg, SCM arg) SCM_NORETURN; | |
4d497b62 AW |
405 | static void vm_error_bad_instruction (scm_t_uint32 inst) SCM_NORETURN SCM_NOINLINE; |
406 | static void vm_error_unbound (SCM proc, SCM sym) SCM_NORETURN SCM_NOINLINE; | |
407 | static void vm_error_unbound_fluid (SCM proc, SCM fluid) SCM_NORETURN SCM_NOINLINE; | |
408 | static void vm_error_not_a_variable (const char *func_name, SCM x) SCM_NORETURN SCM_NOINLINE; | |
409 | static void vm_error_apply_to_non_list (SCM x) SCM_NORETURN SCM_NOINLINE; | |
410 | static void vm_error_kwargs_length_not_even (SCM proc) SCM_NORETURN SCM_NOINLINE; | |
28d5d253 MW |
411 | static void vm_error_kwargs_invalid_keyword (SCM proc, SCM obj) SCM_NORETURN SCM_NOINLINE; |
412 | static void vm_error_kwargs_unrecognized_keyword (SCM proc, SCM kw) SCM_NORETURN SCM_NOINLINE; | |
4d497b62 AW |
413 | static void vm_error_too_many_args (int nargs) SCM_NORETURN SCM_NOINLINE; |
414 | static void vm_error_wrong_num_args (SCM proc) SCM_NORETURN SCM_NOINLINE; | |
415 | static void vm_error_wrong_type_apply (SCM proc) SCM_NORETURN SCM_NOINLINE; | |
416 | static void vm_error_stack_overflow (struct scm_vm *vp) SCM_NORETURN SCM_NOINLINE; | |
417 | static void vm_error_stack_underflow (void) SCM_NORETURN SCM_NOINLINE; | |
418 | static void vm_error_improper_list (SCM x) SCM_NORETURN SCM_NOINLINE; | |
419 | static void vm_error_not_a_pair (const char *subr, SCM x) SCM_NORETURN SCM_NOINLINE; | |
420 | static void vm_error_not_a_bytevector (const char *subr, SCM x) SCM_NORETURN SCM_NOINLINE; | |
421 | static void vm_error_not_a_struct (const char *subr, SCM x) SCM_NORETURN SCM_NOINLINE; | |
422 | static void vm_error_no_values (void) SCM_NORETURN SCM_NOINLINE; | |
423 | static void vm_error_not_enough_values (void) SCM_NORETURN SCM_NOINLINE; | |
82f4bac4 | 424 | static void vm_error_wrong_number_of_values (scm_t_uint32 expected) SCM_NORETURN SCM_NOINLINE; |
4d497b62 AW |
425 | static void vm_error_continuation_not_rewindable (SCM cont) SCM_NORETURN SCM_NOINLINE; |
426 | static void vm_error_bad_wide_string_length (size_t len) SCM_NORETURN SCM_NOINLINE; | |
53bdfcf0 AW |
427 | |
428 | static void | |
429 | vm_error (const char *msg, SCM arg) | |
430 | { | |
431 | scm_throw (sym_vm_error, | |
432 | scm_list_3 (sym_vm_run, scm_from_latin1_string (msg), | |
433 | SCM_UNBNDP (arg) ? SCM_EOL : scm_list_1 (arg))); | |
434 | abort(); /* not reached */ | |
435 | } | |
436 | ||
437 | static void | |
438 | vm_error_bad_instruction (scm_t_uint32 inst) | |
439 | { | |
440 | vm_error ("VM: Bad instruction: ~s", scm_from_uint32 (inst)); | |
441 | } | |
442 | ||
443 | static void | |
444 | vm_error_unbound (SCM proc, SCM sym) | |
445 | { | |
446 | scm_error_scm (scm_misc_error_key, proc, | |
447 | scm_from_latin1_string ("Unbound variable: ~s"), | |
448 | scm_list_1 (sym), SCM_BOOL_F); | |
449 | } | |
450 | ||
451 | static void | |
452 | vm_error_unbound_fluid (SCM proc, SCM fluid) | |
453 | { | |
454 | scm_error_scm (scm_misc_error_key, proc, | |
455 | scm_from_latin1_string ("Unbound fluid: ~s"), | |
456 | scm_list_1 (fluid), SCM_BOOL_F); | |
457 | } | |
458 | ||
459 | static void | |
460 | vm_error_not_a_variable (const char *func_name, SCM x) | |
461 | { | |
462 | scm_error (scm_arg_type_key, func_name, "Not a variable: ~S", | |
463 | scm_list_1 (x), scm_list_1 (x)); | |
464 | } | |
465 | ||
53bdfcf0 AW |
466 | static void |
467 | vm_error_apply_to_non_list (SCM x) | |
468 | { | |
469 | scm_error (scm_arg_type_key, "apply", "Apply to non-list: ~S", | |
470 | scm_list_1 (x), scm_list_1 (x)); | |
471 | } | |
472 | ||
473 | static void | |
474 | vm_error_kwargs_length_not_even (SCM proc) | |
475 | { | |
476 | scm_error_scm (sym_keyword_argument_error, proc, | |
477 | scm_from_latin1_string ("Odd length of keyword argument list"), | |
478 | SCM_EOL, SCM_BOOL_F); | |
479 | } | |
480 | ||
481 | static void | |
4af0d97e | 482 | vm_error_kwargs_invalid_keyword (SCM proc, SCM obj) |
53bdfcf0 AW |
483 | { |
484 | scm_error_scm (sym_keyword_argument_error, proc, | |
485 | scm_from_latin1_string ("Invalid keyword"), | |
4af0d97e | 486 | SCM_EOL, scm_list_1 (obj)); |
53bdfcf0 AW |
487 | } |
488 | ||
489 | static void | |
4af0d97e | 490 | vm_error_kwargs_unrecognized_keyword (SCM proc, SCM kw) |
53bdfcf0 AW |
491 | { |
492 | scm_error_scm (sym_keyword_argument_error, proc, | |
493 | scm_from_latin1_string ("Unrecognized keyword"), | |
4af0d97e | 494 | SCM_EOL, scm_list_1 (kw)); |
53bdfcf0 AW |
495 | } |
496 | ||
497 | static void | |
498 | vm_error_too_many_args (int nargs) | |
499 | { | |
500 | vm_error ("VM: Too many arguments", scm_from_int (nargs)); | |
501 | } | |
502 | ||
503 | static void | |
504 | vm_error_wrong_num_args (SCM proc) | |
505 | { | |
506 | scm_wrong_num_args (proc); | |
507 | } | |
508 | ||
509 | static void | |
510 | vm_error_wrong_type_apply (SCM proc) | |
511 | { | |
512 | scm_error (scm_arg_type_key, NULL, "Wrong type to apply: ~S", | |
513 | scm_list_1 (proc), scm_list_1 (proc)); | |
514 | } | |
515 | ||
516 | static void | |
517 | vm_error_stack_overflow (struct scm_vm *vp) | |
518 | { | |
519 | if (vp->stack_limit < vp->stack_base + vp->stack_size) | |
520 | /* There are VM_STACK_RESERVE_SIZE bytes left. Make them available so | |
521 | that `throw' below can run on this VM. */ | |
522 | vp->stack_limit = vp->stack_base + vp->stack_size; | |
523 | else | |
524 | /* There is no space left on the stack. FIXME: Do something more | |
525 | sensible here! */ | |
526 | abort (); | |
527 | vm_error ("VM: Stack overflow", SCM_UNDEFINED); | |
528 | } | |
529 | ||
530 | static void | |
531 | vm_error_stack_underflow (void) | |
532 | { | |
533 | vm_error ("VM: Stack underflow", SCM_UNDEFINED); | |
534 | } | |
535 | ||
536 | static void | |
537 | vm_error_improper_list (SCM x) | |
538 | { | |
539 | vm_error ("Expected a proper list, but got object with tail ~s", x); | |
540 | } | |
541 | ||
542 | static void | |
543 | vm_error_not_a_pair (const char *subr, SCM x) | |
544 | { | |
545 | scm_wrong_type_arg_msg (subr, 1, x, "pair"); | |
546 | } | |
547 | ||
548 | static void | |
549 | vm_error_not_a_bytevector (const char *subr, SCM x) | |
550 | { | |
551 | scm_wrong_type_arg_msg (subr, 1, x, "bytevector"); | |
552 | } | |
553 | ||
554 | static void | |
555 | vm_error_not_a_struct (const char *subr, SCM x) | |
556 | { | |
557 | scm_wrong_type_arg_msg (subr, 1, x, "struct"); | |
558 | } | |
559 | ||
560 | static void | |
561 | vm_error_no_values (void) | |
562 | { | |
563 | vm_error ("Zero values returned to single-valued continuation", | |
564 | SCM_UNDEFINED); | |
565 | } | |
566 | ||
567 | static void | |
568 | vm_error_not_enough_values (void) | |
569 | { | |
570 | vm_error ("Too few values returned to continuation", SCM_UNDEFINED); | |
571 | } | |
572 | ||
82f4bac4 AW |
573 | static void |
574 | vm_error_wrong_number_of_values (scm_t_uint32 expected) | |
575 | { | |
576 | vm_error ("Wrong number of values returned to continuation (expected ~a)", | |
577 | scm_from_uint32 (expected)); | |
578 | } | |
579 | ||
53bdfcf0 AW |
580 | static void |
581 | vm_error_continuation_not_rewindable (SCM cont) | |
582 | { | |
583 | vm_error ("Unrewindable partial continuation", cont); | |
584 | } | |
585 | ||
586 | static void | |
587 | vm_error_bad_wide_string_length (size_t len) | |
588 | { | |
589 | vm_error ("VM: Bad wide string length: ~S", scm_from_size_t (len)); | |
590 | } | |
591 | ||
53bdfcf0 AW |
592 | |
593 | \f | |
28b119ee | 594 | |
ef6b7f71 | 595 | static SCM vm_boot_continuation; |
486013d6 AW |
596 | static SCM vm_builtin_apply; |
597 | static SCM vm_builtin_values; | |
598 | static SCM vm_builtin_abort_to_prompt; | |
599 | static SCM vm_builtin_call_with_values; | |
600 | static SCM vm_builtin_call_with_current_continuation; | |
510ca126 | 601 | |
ef6b7f71 | 602 | static const scm_t_uint32 vm_boot_continuation_code[] = { |
095100bb | 603 | SCM_PACK_OP_24 (halt, 0) |
510ca126 AW |
604 | }; |
605 | ||
486013d6 | 606 | static const scm_t_uint32 vm_builtin_apply_code[] = { |
095100bb AW |
607 | SCM_PACK_OP_24 (assert_nargs_ge, 3), |
608 | SCM_PACK_OP_24 (tail_apply, 0), /* proc in r1, args from r2 */ | |
510ca126 AW |
609 | }; |
610 | ||
486013d6 | 611 | static const scm_t_uint32 vm_builtin_values_code[] = { |
095100bb | 612 | SCM_PACK_OP_24 (return_values, 0) /* vals from r1 */ |
510ca126 AW |
613 | }; |
614 | ||
486013d6 | 615 | static const scm_t_uint32 vm_builtin_abort_to_prompt_code[] = { |
095100bb AW |
616 | SCM_PACK_OP_24 (assert_nargs_ge, 2), |
617 | SCM_PACK_OP_24 (abort, 0), /* tag in r1, vals from r2 */ | |
486013d6 | 618 | /* FIXME: Partial continuation should capture caller regs. */ |
095100bb | 619 | SCM_PACK_OP_24 (return_values, 0) /* vals from r1 */ |
486013d6 AW |
620 | }; |
621 | ||
622 | static const scm_t_uint32 vm_builtin_call_with_values_code[] = { | |
095100bb AW |
623 | SCM_PACK_OP_24 (assert_nargs_ee, 3), |
624 | SCM_PACK_OP_24 (alloc_frame, 7), | |
625 | SCM_PACK_OP_12_12 (mov, 6, 1), | |
626 | SCM_PACK_OP_24 (call, 6), SCM_PACK_OP_ARG_8_24 (0, 1), | |
627 | SCM_PACK_OP_12_12 (mov, 0, 2), | |
628 | SCM_PACK_OP_24 (tail_call_shuffle, 7) | |
486013d6 AW |
629 | }; |
630 | ||
631 | static const scm_t_uint32 vm_builtin_call_with_current_continuation_code[] = { | |
095100bb AW |
632 | SCM_PACK_OP_24 (assert_nargs_ee, 2), |
633 | SCM_PACK_OP_24 (call_cc, 0) | |
486013d6 AW |
634 | }; |
635 | ||
636 | ||
637 | static SCM | |
638 | scm_vm_builtin_ref (unsigned idx) | |
639 | { | |
640 | switch (idx) | |
641 | { | |
9f309e2c | 642 | #define INDEX_TO_NAME(builtin, BUILTIN, req, opt, rest) \ |
486013d6 AW |
643 | case SCM_VM_BUILTIN_##BUILTIN: return vm_builtin_##builtin; |
644 | FOR_EACH_VM_BUILTIN(INDEX_TO_NAME) | |
645 | #undef INDEX_TO_NAME | |
646 | default: abort(); | |
647 | } | |
648 | } | |
649 | ||
9f309e2c | 650 | SCM scm_sym_apply; |
486013d6 AW |
651 | static SCM scm_sym_values; |
652 | static SCM scm_sym_abort_to_prompt; | |
653 | static SCM scm_sym_call_with_values; | |
654 | static SCM scm_sym_call_with_current_continuation; | |
655 | ||
656 | SCM | |
657 | scm_vm_builtin_name_to_index (SCM name) | |
658 | #define FUNC_NAME "builtin-name->index" | |
659 | { | |
660 | SCM_VALIDATE_SYMBOL (1, name); | |
661 | ||
9f309e2c | 662 | #define NAME_TO_INDEX(builtin, BUILTIN, req, opt, rest) \ |
486013d6 AW |
663 | if (scm_is_eq (name, scm_sym_##builtin)) \ |
664 | return scm_from_uint (SCM_VM_BUILTIN_##BUILTIN); | |
665 | FOR_EACH_VM_BUILTIN(NAME_TO_INDEX) | |
666 | #undef NAME_TO_INDEX | |
667 | ||
668 | return SCM_BOOL_F; | |
669 | } | |
670 | #undef FUNC_NAME | |
671 | ||
672 | SCM | |
673 | scm_vm_builtin_index_to_name (SCM index) | |
674 | #define FUNC_NAME "builtin-index->name" | |
675 | { | |
676 | unsigned idx; | |
677 | ||
678 | SCM_VALIDATE_UINT_COPY (1, index, idx); | |
679 | ||
680 | switch (idx) | |
681 | { | |
9f309e2c | 682 | #define INDEX_TO_NAME(builtin, BUILTIN, req, opt, rest) \ |
486013d6 AW |
683 | case SCM_VM_BUILTIN_##BUILTIN: return scm_sym_##builtin; |
684 | FOR_EACH_VM_BUILTIN(INDEX_TO_NAME) | |
685 | #undef INDEX_TO_NAME | |
686 | default: return SCM_BOOL_F; | |
687 | } | |
688 | } | |
689 | #undef FUNC_NAME | |
690 | ||
691 | static void | |
692 | scm_init_vm_builtins (void) | |
693 | { | |
486013d6 AW |
694 | scm_c_define_gsubr ("builtin-name->index", 1, 0, 0, |
695 | scm_vm_builtin_name_to_index); | |
696 | scm_c_define_gsubr ("builtin-index->name", 1, 0, 0, | |
697 | scm_vm_builtin_index_to_name); | |
698 | } | |
699 | ||
700 | SCM | |
701 | scm_i_call_with_current_continuation (SCM proc) | |
702 | { | |
703 | return scm_call_1 (vm_builtin_call_with_current_continuation, proc); | |
704 | } | |
510ca126 | 705 | |
a98cef7e KN |
706 | \f |
707 | /* | |
708 | * VM | |
709 | */ | |
710 | ||
b7393ea1 | 711 | static SCM |
b782ed01 | 712 | resolve_variable (SCM what, SCM module) |
b7393ea1 | 713 | { |
9bd48cb1 | 714 | if (SCM_LIKELY (scm_is_symbol (what))) |
b7393ea1 | 715 | { |
b782ed01 AW |
716 | if (scm_is_true (module)) |
717 | return scm_module_lookup (module, what); | |
b7393ea1 | 718 | else |
62e15979 | 719 | return scm_module_lookup (scm_the_root_module (), what); |
b7393ea1 AW |
720 | } |
721 | else | |
722 | { | |
b782ed01 AW |
723 | SCM modname, sym, public; |
724 | ||
725 | modname = SCM_CAR (what); | |
726 | sym = SCM_CADR (what); | |
727 | public = SCM_CADDR (what); | |
728 | ||
d6fbf0c0 AW |
729 | if (!scm_module_system_booted_p) |
730 | { | |
731 | #ifdef VM_ENABLE_PARANOID_ASSERTIONS | |
732 | ASSERT (scm_is_false (public)); | |
733 | ASSERT (scm_is_true | |
734 | (scm_equal_p (modname, | |
735 | scm_list_1 (scm_from_utf8_symbol ("guile"))))); | |
736 | #endif | |
737 | return scm_lookup (sym); | |
738 | } | |
739 | else if (scm_is_true (public)) | |
b782ed01 AW |
740 | return scm_public_lookup (modname, sym); |
741 | else | |
742 | return scm_private_lookup (modname, sym); | |
b7393ea1 AW |
743 | } |
744 | } | |
745 | ||
aab9d46c | 746 | #define VM_MIN_STACK_SIZE (1024) |
486013d6 | 747 | #define VM_DEFAULT_STACK_SIZE (256 * 1024) |
aab9d46c SIT |
748 | static size_t vm_stack_size = VM_DEFAULT_STACK_SIZE; |
749 | ||
750 | static void | |
751 | initialize_default_stack_size (void) | |
752 | { | |
753 | int size = scm_getenv_int ("GUILE_STACK_SIZE", vm_stack_size); | |
754 | if (size >= VM_MIN_STACK_SIZE) | |
755 | vm_stack_size = size; | |
756 | } | |
17e90c5e | 757 | |
510ca126 | 758 | #define RTL_VM_NAME rtl_vm_regular_engine |
6d14383e AW |
759 | #define FUNC_NAME "vm-regular-engine" |
760 | #define VM_ENGINE SCM_VM_REGULAR_ENGINE | |
83495480 | 761 | #include "vm-engine.c" |
510ca126 | 762 | #undef RTL_VM_NAME |
6d14383e | 763 | #undef FUNC_NAME |
17e90c5e | 764 | #undef VM_ENGINE |
17e90c5e | 765 | |
510ca126 | 766 | #define RTL_VM_NAME rtl_vm_debug_engine |
6d14383e AW |
767 | #define FUNC_NAME "vm-debug-engine" |
768 | #define VM_ENGINE SCM_VM_DEBUG_ENGINE | |
83495480 | 769 | #include "vm-engine.c" |
510ca126 | 770 | #undef RTL_VM_NAME |
6d14383e | 771 | #undef FUNC_NAME |
17e90c5e KN |
772 | #undef VM_ENGINE |
773 | ||
73c3db66 AW |
774 | typedef SCM (*scm_t_rtl_vm_engine) (SCM vm, SCM program, SCM *argv, size_t nargs); |
775 | ||
776 | static const scm_t_rtl_vm_engine rtl_vm_engines[] = | |
777 | { rtl_vm_regular_engine, rtl_vm_debug_engine }; | |
778 | ||
e3eb628d LC |
779 | #ifdef VM_ENABLE_PRECISE_STACK_GC_SCAN |
780 | ||
781 | /* The GC "kind" for the VM stack. */ | |
782 | static int vm_stack_gc_kind; | |
783 | ||
784 | #endif | |
785 | ||
a98cef7e | 786 | static SCM |
17e90c5e KN |
787 | make_vm (void) |
788 | #define FUNC_NAME "make_vm" | |
a98cef7e | 789 | { |
17e90c5e | 790 | int i; |
7f991c7d | 791 | struct scm_vm *vp; |
747a1635 | 792 | |
7f991c7d | 793 | vp = scm_gc_malloc (sizeof (struct scm_vm), "vm"); |
d8eeb67c | 794 | |
aab9d46c | 795 | vp->stack_size= vm_stack_size; |
e3eb628d LC |
796 | |
797 | #ifdef VM_ENABLE_PRECISE_STACK_GC_SCAN | |
4168aa46 TTN |
798 | vp->stack_base = (SCM *) |
799 | GC_generic_malloc (vp->stack_size * sizeof (SCM), vm_stack_gc_kind); | |
e3eb628d LC |
800 | |
801 | /* Keep a pointer to VP so that `vm_stack_mark ()' can know what the stack | |
802 | top is. */ | |
21041372 | 803 | *vp->stack_base = SCM_PACK_POINTER (vp); |
e3eb628d LC |
804 | vp->stack_base++; |
805 | vp->stack_size--; | |
806 | #else | |
d8eeb67c LC |
807 | vp->stack_base = scm_gc_malloc (vp->stack_size * sizeof (SCM), |
808 | "stack-base"); | |
e3eb628d LC |
809 | #endif |
810 | ||
2bbe1533 AW |
811 | #ifdef VM_ENABLE_STACK_NULLING |
812 | memset (vp->stack_base, 0, vp->stack_size * sizeof (SCM)); | |
813 | #endif | |
f1046e6b | 814 | vp->stack_limit = vp->stack_base + vp->stack_size - VM_STACK_RESERVE_SIZE; |
3616e9e9 KN |
815 | vp->ip = NULL; |
816 | vp->sp = vp->stack_base - 1; | |
817 | vp->fp = NULL; | |
ea9f4f4b | 818 | vp->engine = vm_default_engine; |
7656f194 | 819 | vp->trace_level = 0; |
17e90c5e | 820 | for (i = 0; i < SCM_VM_NUM_HOOKS; i++) |
3d5ee0cd | 821 | vp->hooks[i] = SCM_BOOL_F; |
6f3b0cc2 | 822 | return scm_cell (scm_tc7_vm, (scm_t_bits)vp); |
a98cef7e | 823 | } |
17e90c5e | 824 | #undef FUNC_NAME |
a98cef7e | 825 | |
e3eb628d LC |
826 | #ifdef VM_ENABLE_PRECISE_STACK_GC_SCAN |
827 | ||
828 | /* Mark the VM stack region between its base and its current top. */ | |
829 | static struct GC_ms_entry * | |
830 | vm_stack_mark (GC_word *addr, struct GC_ms_entry *mark_stack_ptr, | |
831 | struct GC_ms_entry *mark_stack_limit, GC_word env) | |
832 | { | |
833 | GC_word *word; | |
834 | const struct scm_vm *vm; | |
835 | ||
836 | /* The first word of the VM stack should contain a pointer to the | |
837 | corresponding VM. */ | |
838 | vm = * ((struct scm_vm **) addr); | |
839 | ||
8071c490 | 840 | if (vm == NULL |
f1046e6b | 841 | || (SCM *) addr != vm->stack_base - 1) |
e3eb628d LC |
842 | /* ADDR must be a pointer to a free-list element, which we must ignore |
843 | (see warning in <gc/gc_mark.h>). */ | |
844 | return mark_stack_ptr; | |
845 | ||
e3eb628d LC |
846 | for (word = (GC_word *) vm->stack_base; word <= (GC_word *) vm->sp; word++) |
847 | mark_stack_ptr = GC_MARK_AND_PUSH ((* (GC_word **) word), | |
848 | mark_stack_ptr, mark_stack_limit, | |
849 | NULL); | |
850 | ||
851 | return mark_stack_ptr; | |
852 | } | |
853 | ||
854 | #endif /* VM_ENABLE_PRECISE_STACK_GC_SCAN */ | |
855 | ||
856 | ||
6d14383e | 857 | SCM |
4abef68f | 858 | scm_c_vm_run (SCM vm, SCM program, SCM *argv, int nargs) |
6d14383e | 859 | { |
4abef68f | 860 | struct scm_vm *vp = SCM_VM_DATA (vm); |
b95d76fc | 861 | SCM_CHECK_STACK; |
1c33be99 | 862 | return rtl_vm_engines[vp->engine](vm, program, argv, nargs); |
6d14383e AW |
863 | } |
864 | ||
a98cef7e KN |
865 | /* Scheme interface */ |
866 | ||
271c3d31 LC |
867 | SCM_DEFINE (scm_the_vm, "the-vm", 0, 0, 0, |
868 | (void), | |
869 | "Return the current thread's VM.") | |
870 | #define FUNC_NAME s_scm_the_vm | |
871 | { | |
ea9f4f4b AW |
872 | scm_i_thread *t = SCM_I_CURRENT_THREAD; |
873 | ||
874 | if (SCM_UNLIKELY (scm_is_false (t->vm))) | |
875 | t->vm = make_vm (); | |
876 | ||
877 | return t->vm; | |
271c3d31 | 878 | } |
499a4c07 KN |
879 | #undef FUNC_NAME |
880 | ||
881 | ||
a98cef7e KN |
882 | SCM_DEFINE (scm_vm_p, "vm?", 1, 0, 0, |
883 | (SCM obj), | |
17e90c5e | 884 | "") |
a98cef7e KN |
885 | #define FUNC_NAME s_scm_vm_p |
886 | { | |
9bd48cb1 | 887 | return scm_from_bool (SCM_VM_P (obj)); |
a98cef7e KN |
888 | } |
889 | #undef FUNC_NAME | |
890 | ||
891 | SCM_DEFINE (scm_make_vm, "make-vm", 0, 0, 0, | |
17e90c5e KN |
892 | (void), |
893 | "") | |
894 | #define FUNC_NAME s_scm_make_vm, | |
a98cef7e | 895 | { |
17e90c5e | 896 | return make_vm (); |
a98cef7e KN |
897 | } |
898 | #undef FUNC_NAME | |
899 | ||
17e90c5e | 900 | SCM_DEFINE (scm_vm_ip, "vm:ip", 1, 0, 0, |
a98cef7e | 901 | (SCM vm), |
17e90c5e KN |
902 | "") |
903 | #define FUNC_NAME s_scm_vm_ip | |
a98cef7e KN |
904 | { |
905 | SCM_VALIDATE_VM (1, vm); | |
3d27ef4b | 906 | return scm_from_unsigned_integer ((scm_t_bits) SCM_VM_DATA (vm)->ip); |
a98cef7e KN |
907 | } |
908 | #undef FUNC_NAME | |
909 | ||
910 | SCM_DEFINE (scm_vm_sp, "vm:sp", 1, 0, 0, | |
911 | (SCM vm), | |
17e90c5e | 912 | "") |
a98cef7e KN |
913 | #define FUNC_NAME s_scm_vm_sp |
914 | { | |
915 | SCM_VALIDATE_VM (1, vm); | |
3d27ef4b | 916 | return scm_from_unsigned_integer ((scm_t_bits) SCM_VM_DATA (vm)->sp); |
a98cef7e KN |
917 | } |
918 | #undef FUNC_NAME | |
919 | ||
920 | SCM_DEFINE (scm_vm_fp, "vm:fp", 1, 0, 0, | |
921 | (SCM vm), | |
17e90c5e | 922 | "") |
a98cef7e KN |
923 | #define FUNC_NAME s_scm_vm_fp |
924 | { | |
925 | SCM_VALIDATE_VM (1, vm); | |
3d27ef4b | 926 | return scm_from_unsigned_integer ((scm_t_bits) SCM_VM_DATA (vm)->fp); |
a98cef7e KN |
927 | } |
928 | #undef FUNC_NAME | |
929 | ||
17e90c5e KN |
930 | #define VM_DEFINE_HOOK(n) \ |
931 | { \ | |
3d5ee0cd | 932 | struct scm_vm *vp; \ |
17e90c5e | 933 | SCM_VALIDATE_VM (1, vm); \ |
3d5ee0cd | 934 | vp = SCM_VM_DATA (vm); \ |
8b22ed7a | 935 | if (scm_is_false (vp->hooks[n])) \ |
238e7a11 | 936 | vp->hooks[n] = scm_make_hook (SCM_I_MAKINUM (1)); \ |
3d5ee0cd | 937 | return vp->hooks[n]; \ |
17e90c5e KN |
938 | } |
939 | ||
c45d4d77 | 940 | SCM_DEFINE (scm_vm_apply_hook, "vm-apply-hook", 1, 0, 0, |
17e90c5e KN |
941 | (SCM vm), |
942 | "") | |
c45d4d77 | 943 | #define FUNC_NAME s_scm_vm_apply_hook |
a98cef7e | 944 | { |
c45d4d77 | 945 | VM_DEFINE_HOOK (SCM_VM_APPLY_HOOK); |
a98cef7e KN |
946 | } |
947 | #undef FUNC_NAME | |
948 | ||
c45d4d77 | 949 | SCM_DEFINE (scm_vm_push_continuation_hook, "vm-push-continuation-hook", 1, 0, 0, |
17e90c5e KN |
950 | (SCM vm), |
951 | "") | |
c45d4d77 | 952 | #define FUNC_NAME s_scm_vm_push_continuation_hook |
a98cef7e | 953 | { |
c45d4d77 | 954 | VM_DEFINE_HOOK (SCM_VM_PUSH_CONTINUATION_HOOK); |
a98cef7e KN |
955 | } |
956 | #undef FUNC_NAME | |
957 | ||
c45d4d77 | 958 | SCM_DEFINE (scm_vm_pop_continuation_hook, "vm-pop-continuation-hook", 1, 0, 0, |
a98cef7e | 959 | (SCM vm), |
17e90c5e | 960 | "") |
c45d4d77 | 961 | #define FUNC_NAME s_scm_vm_pop_continuation_hook |
a98cef7e | 962 | { |
c45d4d77 | 963 | VM_DEFINE_HOOK (SCM_VM_POP_CONTINUATION_HOOK); |
a98cef7e KN |
964 | } |
965 | #undef FUNC_NAME | |
966 | ||
c45d4d77 | 967 | SCM_DEFINE (scm_vm_next_hook, "vm-next-hook", 1, 0, 0, |
a98cef7e | 968 | (SCM vm), |
17e90c5e | 969 | "") |
c45d4d77 | 970 | #define FUNC_NAME s_scm_vm_next_hook |
a98cef7e | 971 | { |
c45d4d77 | 972 | VM_DEFINE_HOOK (SCM_VM_NEXT_HOOK); |
a98cef7e KN |
973 | } |
974 | #undef FUNC_NAME | |
f3120251 AW |
975 | |
976 | SCM_DEFINE (scm_vm_abort_continuation_hook, "vm-abort-continuation-hook", 1, 0, 0, | |
977 | (SCM vm), | |
978 | "") | |
979 | #define FUNC_NAME s_scm_vm_abort_continuation_hook | |
980 | { | |
981 | VM_DEFINE_HOOK (SCM_VM_ABORT_CONTINUATION_HOOK); | |
982 | } | |
983 | #undef FUNC_NAME | |
984 | ||
985 | SCM_DEFINE (scm_vm_restore_continuation_hook, "vm-restore-continuation-hook", 1, 0, 0, | |
986 | (SCM vm), | |
987 | "") | |
988 | #define FUNC_NAME s_scm_vm_restore_continuation_hook | |
989 | { | |
990 | VM_DEFINE_HOOK (SCM_VM_RESTORE_CONTINUATION_HOOK); | |
991 | } | |
992 | #undef FUNC_NAME | |
a98cef7e | 993 | |
7656f194 | 994 | SCM_DEFINE (scm_vm_trace_level, "vm-trace-level", 1, 0, 0, |
17e90c5e KN |
995 | (SCM vm), |
996 | "") | |
7656f194 | 997 | #define FUNC_NAME s_scm_vm_trace_level |
a98cef7e | 998 | { |
a98cef7e | 999 | SCM_VALIDATE_VM (1, vm); |
7656f194 AW |
1000 | return scm_from_int (SCM_VM_DATA (vm)->trace_level); |
1001 | } | |
1002 | #undef FUNC_NAME | |
1003 | ||
1004 | SCM_DEFINE (scm_set_vm_trace_level_x, "set-vm-trace-level!", 2, 0, 0, | |
1005 | (SCM vm, SCM level), | |
1006 | "") | |
1007 | #define FUNC_NAME s_scm_set_vm_trace_level_x | |
1008 | { | |
1009 | SCM_VALIDATE_VM (1, vm); | |
1010 | SCM_VM_DATA (vm)->trace_level = scm_to_int (level); | |
1011 | return SCM_UNSPECIFIED; | |
a98cef7e KN |
1012 | } |
1013 | #undef FUNC_NAME | |
1014 | ||
1015 | \f | |
ea9f4f4b AW |
1016 | /* |
1017 | * VM engines | |
1018 | */ | |
1019 | ||
1020 | static int | |
1021 | symbol_to_vm_engine (SCM engine, const char *FUNC_NAME) | |
1022 | { | |
1023 | if (scm_is_eq (engine, sym_regular)) | |
1024 | return SCM_VM_REGULAR_ENGINE; | |
1025 | else if (scm_is_eq (engine, sym_debug)) | |
1026 | return SCM_VM_DEBUG_ENGINE; | |
1027 | else | |
1028 | SCM_MISC_ERROR ("Unknown VM engine: ~a", scm_list_1 (engine)); | |
1029 | } | |
1030 | ||
1031 | static SCM | |
1032 | vm_engine_to_symbol (int engine, const char *FUNC_NAME) | |
1033 | { | |
1034 | switch (engine) | |
1035 | { | |
1036 | case SCM_VM_REGULAR_ENGINE: | |
1037 | return sym_regular; | |
1038 | case SCM_VM_DEBUG_ENGINE: | |
1039 | return sym_debug; | |
1040 | default: | |
1041 | /* ? */ | |
1042 | SCM_MISC_ERROR ("Unknown VM engine: ~a", | |
1043 | scm_list_1 (scm_from_int (engine))); | |
1044 | } | |
1045 | } | |
1046 | ||
ea9f4f4b AW |
1047 | SCM_DEFINE (scm_vm_engine, "vm-engine", 1, 0, 0, |
1048 | (SCM vm), | |
1049 | "") | |
1050 | #define FUNC_NAME s_scm_vm_engine | |
1051 | { | |
1052 | SCM_VALIDATE_VM (1, vm); | |
1053 | return vm_engine_to_symbol (SCM_VM_DATA (vm)->engine, FUNC_NAME); | |
1054 | } | |
1055 | #undef FUNC_NAME | |
1056 | ||
1057 | void | |
1058 | scm_c_set_vm_engine_x (SCM vm, int engine) | |
1059 | #define FUNC_NAME "set-vm-engine!" | |
1060 | { | |
1061 | SCM_VALIDATE_VM (1, vm); | |
1062 | ||
ea9f4f4b AW |
1063 | if (engine < 0 || engine >= SCM_VM_NUM_ENGINES) |
1064 | SCM_MISC_ERROR ("Unknown VM engine: ~a", | |
1065 | scm_list_1 (scm_from_int (engine))); | |
1066 | ||
1067 | SCM_VM_DATA (vm)->engine = engine; | |
1068 | } | |
1069 | #undef FUNC_NAME | |
1070 | ||
1071 | SCM_DEFINE (scm_set_vm_engine_x, "set-vm-engine!", 2, 0, 0, | |
1072 | (SCM vm, SCM engine), | |
1073 | "") | |
1074 | #define FUNC_NAME s_scm_set_vm_engine_x | |
1075 | { | |
1076 | scm_c_set_vm_engine_x (vm, symbol_to_vm_engine (engine, FUNC_NAME)); | |
1077 | return SCM_UNSPECIFIED; | |
1078 | } | |
1079 | #undef FUNC_NAME | |
1080 | ||
1081 | void | |
1082 | scm_c_set_default_vm_engine_x (int engine) | |
1083 | #define FUNC_NAME "set-default-vm-engine!" | |
1084 | { | |
1085 | if (engine < 0 || engine >= SCM_VM_NUM_ENGINES) | |
1086 | SCM_MISC_ERROR ("Unknown VM engine: ~a", | |
1087 | scm_list_1 (scm_from_int (engine))); | |
1088 | ||
1089 | vm_default_engine = engine; | |
1090 | } | |
1091 | #undef FUNC_NAME | |
1092 | ||
1093 | SCM_DEFINE (scm_set_default_vm_engine_x, "set-default-vm-engine!", 1, 0, 0, | |
1094 | (SCM engine), | |
1095 | "") | |
1096 | #define FUNC_NAME s_scm_set_default_vm_engine_x | |
1097 | { | |
1098 | scm_c_set_default_vm_engine_x (symbol_to_vm_engine (engine, FUNC_NAME)); | |
1099 | return SCM_UNSPECIFIED; | |
1100 | } | |
1101 | #undef FUNC_NAME | |
1102 | ||
1103 | static void reinstate_vm (SCM vm) | |
1104 | { | |
1105 | scm_i_thread *t = SCM_I_CURRENT_THREAD; | |
1106 | t->vm = vm; | |
1107 | } | |
1108 | ||
1109 | SCM_DEFINE (scm_call_with_vm, "call-with-vm", 2, 0, 1, | |
1110 | (SCM vm, SCM proc, SCM args), | |
1111 | "Apply @var{proc} to @var{args} in a dynamic extent in which\n" | |
1112 | "@var{vm} is the current VM.\n\n" | |
1113 | "As an implementation restriction, if @var{vm} is not the same\n" | |
1114 | "as the current thread's VM, continuations captured within the\n" | |
1115 | "call to @var{proc} may not be reinstated once control leaves\n" | |
1116 | "@var{proc}.") | |
1117 | #define FUNC_NAME s_scm_call_with_vm | |
1118 | { | |
1119 | SCM prev_vm, ret; | |
1120 | SCM *argv; | |
1121 | int i, nargs; | |
1122 | scm_t_wind_flags flags; | |
1123 | scm_i_thread *t = SCM_I_CURRENT_THREAD; | |
1124 | ||
1125 | SCM_VALIDATE_VM (1, vm); | |
1126 | SCM_VALIDATE_PROC (2, proc); | |
1127 | ||
1128 | nargs = scm_ilength (args); | |
1129 | if (SCM_UNLIKELY (nargs < 0)) | |
1130 | scm_wrong_type_arg_msg (FUNC_NAME, 3, args, "list"); | |
1131 | ||
1132 | argv = alloca (nargs * sizeof(SCM)); | |
1133 | for (i = 0; i < nargs; i++) | |
1134 | { | |
1135 | argv[i] = SCM_CAR (args); | |
1136 | args = SCM_CDR (args); | |
1137 | } | |
1138 | ||
1139 | prev_vm = t->vm; | |
1140 | ||
1141 | /* Reentry can happen via invokation of a saved continuation, but | |
1142 | continuations only save the state of the VM that they are in at | |
1143 | capture-time, which might be different from this one. So, in the | |
1144 | case that the VMs are different, set up a non-rewindable frame to | |
1145 | prevent reinstating an incomplete continuation. */ | |
1146 | flags = scm_is_eq (prev_vm, vm) ? 0 : SCM_F_WIND_EXPLICITLY; | |
1147 | if (flags) | |
1148 | { | |
1149 | scm_dynwind_begin (0); | |
1150 | scm_dynwind_unwind_handler_with_scm (reinstate_vm, prev_vm, flags); | |
1151 | t->vm = vm; | |
1152 | } | |
1153 | ||
1154 | ret = scm_c_vm_run (vm, proc, argv, nargs); | |
1155 | ||
1156 | if (flags) | |
1157 | scm_dynwind_end (); | |
1158 | ||
1159 | return ret; | |
1160 | } | |
1161 | #undef FUNC_NAME | |
1162 | ||
1163 | \f | |
a98cef7e | 1164 | /* |
17e90c5e | 1165 | * Initialize |
a98cef7e KN |
1166 | */ |
1167 | ||
07e56b27 AW |
1168 | SCM scm_load_compiled_with_vm (SCM file) |
1169 | { | |
b8bc86bc AW |
1170 | SCM program = scm_load_thunk_from_file (file); |
1171 | ||
4abef68f | 1172 | return scm_c_vm_run (scm_the_vm (), program, NULL, 0); |
07e56b27 AW |
1173 | } |
1174 | ||
67b699cc | 1175 | |
9f309e2c AW |
1176 | void |
1177 | scm_init_vm_builtin_properties (void) | |
1178 | { | |
1179 | /* FIXME: Seems hacky to do this here, but oh well :/ */ | |
1180 | scm_sym_apply = scm_from_utf8_symbol ("apply"); | |
1181 | scm_sym_values = scm_from_utf8_symbol ("values"); | |
1182 | scm_sym_abort_to_prompt = scm_from_utf8_symbol ("abort-to-prompt"); | |
1183 | scm_sym_call_with_values = scm_from_utf8_symbol ("call-with-values"); | |
1184 | scm_sym_call_with_current_continuation = | |
1185 | scm_from_utf8_symbol ("call-with-current-continuation"); | |
1186 | ||
1187 | #define INIT_BUILTIN(builtin, BUILTIN, req, opt, rest) \ | |
1188 | scm_set_procedure_property_x (vm_builtin_##builtin, scm_sym_name, \ | |
1189 | scm_sym_##builtin); \ | |
1190 | scm_set_procedure_minimum_arity_x (vm_builtin_##builtin, \ | |
1191 | SCM_I_MAKINUM (req), \ | |
1192 | SCM_I_MAKINUM (opt), \ | |
1193 | scm_from_bool (rest)); | |
1194 | FOR_EACH_VM_BUILTIN (INIT_BUILTIN); | |
1195 | #undef INIT_BUILTIN | |
1196 | } | |
1197 | ||
17e90c5e | 1198 | void |
07e56b27 | 1199 | scm_bootstrap_vm (void) |
17e90c5e | 1200 | { |
44602b08 AW |
1201 | scm_c_register_extension ("libguile-" SCM_EFFECTIVE_VERSION, |
1202 | "scm_init_vm", | |
60ae5ca2 | 1203 | (scm_t_extension_init_func)scm_init_vm, NULL); |
486013d6 AW |
1204 | scm_c_register_extension ("libguile-" SCM_EFFECTIVE_VERSION, |
1205 | "scm_init_vm_builtins", | |
1206 | (scm_t_extension_init_func)scm_init_vm_builtins, | |
1207 | NULL); | |
60ae5ca2 | 1208 | |
aab9d46c SIT |
1209 | initialize_default_stack_size (); |
1210 | ||
4a655e50 AW |
1211 | sym_vm_run = scm_from_latin1_symbol ("vm-run"); |
1212 | sym_vm_error = scm_from_latin1_symbol ("vm-error"); | |
1213 | sym_keyword_argument_error = scm_from_latin1_symbol ("keyword-argument-error"); | |
1214 | sym_regular = scm_from_latin1_symbol ("regular"); | |
1215 | sym_debug = scm_from_latin1_symbol ("debug"); | |
0404c97d | 1216 | |
ef6b7f71 AW |
1217 | vm_boot_continuation = scm_i_make_program (vm_boot_continuation_code); |
1218 | SCM_SET_CELL_WORD_0 (vm_boot_continuation, | |
1219 | (SCM_CELL_WORD_0 (vm_boot_continuation) | |
73c3db66 | 1220 | | SCM_F_PROGRAM_IS_BOOT)); |
9f309e2c AW |
1221 | |
1222 | #define DEFINE_BUILTIN(builtin, BUILTIN, req, opt, rest) \ | |
80797145 | 1223 | vm_builtin_##builtin = scm_i_make_program (vm_builtin_##builtin##_code); |
9f309e2c AW |
1224 | FOR_EACH_VM_BUILTIN (DEFINE_BUILTIN); |
1225 | #undef DEFINE_BUILTIN | |
73c3db66 | 1226 | |
e3eb628d LC |
1227 | #ifdef VM_ENABLE_PRECISE_STACK_GC_SCAN |
1228 | vm_stack_gc_kind = | |
1229 | GC_new_kind (GC_new_free_list (), | |
1230 | GC_MAKE_PROC (GC_new_proc (vm_stack_mark), 0), | |
1231 | 0, 1); | |
1232 | ||
1233 | #endif | |
07e56b27 AW |
1234 | } |
1235 | ||
1236 | void | |
1237 | scm_init_vm (void) | |
1238 | { | |
17e90c5e | 1239 | #ifndef SCM_MAGIC_SNARFER |
aeeff258 | 1240 | #include "libguile/vm.x" |
17e90c5e | 1241 | #endif |
a98cef7e | 1242 | } |
17e90c5e KN |
1243 | |
1244 | /* | |
1245 | Local Variables: | |
1246 | c-file-style: "gnu" | |
1247 | End: | |
1248 | */ |