Commit | Line | Data |
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44d97054 | 1 | /* Copyright (C) 2001, 2009, 2010, 2011, 2012, 2013, 2014 Free Software Foundation, Inc. |
ac99cb0c | 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. | |
ac99cb0c | 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. | |
ac99cb0c | 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 | */ |
ac99cb0c | 18 | |
13c47753 AW |
19 | #if HAVE_CONFIG_H |
20 | # include <config.h> | |
21 | #endif | |
22 | ||
da8b4747 | 23 | #include <stdlib.h> |
ac99cb0c | 24 | #include <string.h> |
560b9c25 | 25 | #include "_scm.h" |
ac99cb0c | 26 | #include "frames.h" |
89b235af | 27 | #include "vm.h" |
0fc9040f LC |
28 | #include <verify.h> |
29 | ||
30 | /* Make sure assumptions on the layout of `struct scm_vm_frame' hold. */ | |
31 | verify (sizeof (SCM) == sizeof (SCM *)); | |
b636cdb0 | 32 | verify (sizeof (struct scm_vm_frame) == 3 * sizeof (SCM)); |
0fc9040f | 33 | verify (offsetof (struct scm_vm_frame, dynamic_link) == 0); |
ac99cb0c KN |
34 | |
35 | \f | |
ac99cb0c KN |
36 | |
37 | SCM | |
8de051da | 38 | scm_c_make_frame (enum scm_vm_frame_kind kind, const struct scm_frame *frame) |
ac99cb0c | 39 | { |
aa3f6951 AW |
40 | struct scm_frame *p = scm_gc_malloc (sizeof (struct scm_frame), |
41 | "vmframe"); | |
8de051da AW |
42 | p->stack_holder = frame->stack_holder; |
43 | p->fp_offset = frame->fp_offset; | |
44 | p->sp_offset = frame->sp_offset; | |
45 | p->ip = frame->ip; | |
46 | return scm_cell (scm_tc7_frame | (kind << 8), (scm_t_bits)p); | |
ac99cb0c KN |
47 | } |
48 | ||
6f3b0cc2 AW |
49 | void |
50 | scm_i_frame_print (SCM frame, SCM port, scm_print_state *pstate) | |
2f9769b6 | 51 | { |
0607ebbf | 52 | scm_puts_unlocked ("#<frame ", port); |
2f9769b6 | 53 | scm_uintprint (SCM_UNPACK (frame), 16, port); |
0607ebbf | 54 | scm_putc_unlocked (' ', port); |
aa3f6951 | 55 | scm_write (scm_frame_procedure (frame), port); |
2f9769b6 | 56 | /* don't write args, they can get us into trouble. */ |
0607ebbf | 57 | scm_puts_unlocked (">", port); |
2f9769b6 AW |
58 | } |
59 | ||
44d97054 AW |
60 | static SCM* |
61 | frame_stack_base (enum scm_vm_frame_kind kind, struct scm_frame *frame) | |
89b235af | 62 | { |
44d97054 | 63 | switch (kind) |
5515edc5 AW |
64 | { |
65 | case SCM_VM_FRAME_KIND_CONT: | |
44d97054 | 66 | return ((struct scm_vm_cont *) frame->stack_holder)->stack_base; |
89b235af | 67 | |
5515edc5 | 68 | case SCM_VM_FRAME_KIND_VM: |
44d97054 | 69 | return ((struct scm_vm *) frame->stack_holder)->stack_base; |
5515edc5 AW |
70 | |
71 | default: | |
72 | abort (); | |
73 | } | |
89b235af | 74 | } |
44d97054 AW |
75 | |
76 | static scm_t_ptrdiff | |
77 | frame_offset (enum scm_vm_frame_kind kind, struct scm_frame *frame) | |
78 | { | |
79 | switch (kind) | |
80 | { | |
81 | case SCM_VM_FRAME_KIND_CONT: | |
82 | return ((struct scm_vm_cont *) frame->stack_holder)->reloc; | |
83 | ||
84 | case SCM_VM_FRAME_KIND_VM: | |
85 | return 0; | |
86 | ||
87 | default: | |
88 | abort (); | |
89 | } | |
90 | } | |
91 | ||
92 | SCM* | |
93 | scm_i_frame_stack_base (SCM frame) | |
94 | #define FUNC_NAME "frame-stack-base" | |
95 | { | |
96 | SCM_VALIDATE_VM_FRAME (1, frame); | |
97 | ||
98 | return frame_stack_base (SCM_VM_FRAME_KIND (frame), | |
99 | SCM_VM_FRAME_DATA (frame)); | |
100 | } | |
89b235af AW |
101 | #undef FUNC_NAME |
102 | ||
89b235af AW |
103 | scm_t_ptrdiff |
104 | scm_i_frame_offset (SCM frame) | |
105 | #define FUNC_NAME "frame-offset" | |
106 | { | |
89b235af AW |
107 | SCM_VALIDATE_VM_FRAME (1, frame); |
108 | ||
44d97054 AW |
109 | return frame_offset (SCM_VM_FRAME_KIND (frame), |
110 | SCM_VM_FRAME_DATA (frame)); | |
5515edc5 | 111 | |
89b235af AW |
112 | } |
113 | #undef FUNC_NAME | |
114 | ||
3d94d862 | 115 | \f |
ac99cb0c KN |
116 | /* Scheme interface */ |
117 | ||
aa3f6951 | 118 | SCM_DEFINE (scm_frame_p, "frame?", 1, 0, 0, |
ac99cb0c KN |
119 | (SCM obj), |
120 | "") | |
aa3f6951 | 121 | #define FUNC_NAME s_scm_frame_p |
ac99cb0c | 122 | { |
5c8cefe5 | 123 | return scm_from_bool (SCM_VM_FRAME_P (obj)); |
b1b942b7 AW |
124 | } |
125 | #undef FUNC_NAME | |
126 | ||
aa3f6951 | 127 | SCM_DEFINE (scm_frame_procedure, "frame-procedure", 1, 0, 0, |
b1b942b7 AW |
128 | (SCM frame), |
129 | "") | |
aa3f6951 | 130 | #define FUNC_NAME s_scm_frame_procedure |
b1b942b7 AW |
131 | { |
132 | SCM_VALIDATE_VM_FRAME (1, frame); | |
133 | return SCM_FRAME_PROGRAM (SCM_VM_FRAME_FP (frame)); | |
134 | } | |
135 | #undef FUNC_NAME | |
136 | ||
60617d81 MW |
137 | static SCM frame_arguments_var; |
138 | ||
139 | static void | |
140 | init_frame_arguments_var (void) | |
141 | { | |
142 | frame_arguments_var | |
143 | = scm_c_private_lookup ("system vm frame", "frame-arguments"); | |
144 | } | |
145 | ||
aa3f6951 AW |
146 | SCM_DEFINE (scm_frame_arguments, "frame-arguments", 1, 0, 0, |
147 | (SCM frame), | |
148 | "") | |
149 | #define FUNC_NAME s_scm_frame_arguments | |
b1b942b7 | 150 | { |
60617d81 MW |
151 | static scm_i_pthread_once_t once = SCM_I_PTHREAD_ONCE_INIT; |
152 | scm_i_pthread_once (&once, init_frame_arguments_var); | |
b1b942b7 | 153 | |
60617d81 | 154 | SCM_VALIDATE_VM_FRAME (1, frame); |
b1b942b7 | 155 | |
60617d81 | 156 | return scm_call_1 (scm_variable_ref (frame_arguments_var), frame); |
ac99cb0c KN |
157 | } |
158 | #undef FUNC_NAME | |
159 | ||
423fca76 AW |
160 | SCM_DEFINE (scm_frame_source, "frame-source", 1, 0, 0, |
161 | (SCM frame), | |
162 | "") | |
163 | #define FUNC_NAME s_scm_frame_source | |
ac99cb0c | 164 | { |
423fca76 | 165 | SCM_VALIDATE_VM_FRAME (1, frame); |
b1b942b7 | 166 | |
581a4eb8 | 167 | return scm_find_source_for_addr (scm_frame_instruction_pointer (frame)); |
ac99cb0c | 168 | } |
423fca76 | 169 | #undef FUNC_NAME |
ac99cb0c | 170 | |
aa3f6951 | 171 | SCM_DEFINE (scm_frame_num_locals, "frame-num-locals", 1, 0, 0, |
6c6a4439 AW |
172 | (SCM frame), |
173 | "") | |
aa3f6951 | 174 | #define FUNC_NAME s_scm_frame_num_locals |
6c6a4439 | 175 | { |
b636cdb0 | 176 | SCM *fp, *sp; |
6c6a4439 AW |
177 | |
178 | SCM_VALIDATE_VM_FRAME (1, frame); | |
179 | ||
b636cdb0 | 180 | fp = SCM_VM_FRAME_FP (frame); |
510ca126 | 181 | sp = SCM_VM_FRAME_SP (frame); |
510ca126 | 182 | |
b636cdb0 | 183 | return scm_from_ptrdiff_t (SCM_FRAME_NUM_LOCALS (fp, sp)); |
6c6a4439 AW |
184 | } |
185 | #undef FUNC_NAME | |
186 | ||
aa3f6951 | 187 | SCM_DEFINE (scm_frame_local_ref, "frame-local-ref", 2, 0, 0, |
af988bbf | 188 | (SCM frame, SCM index), |
ac99cb0c | 189 | "") |
aa3f6951 | 190 | #define FUNC_NAME s_scm_frame_local_ref |
ac99cb0c | 191 | { |
b636cdb0 | 192 | SCM *fp, *sp; |
b1b942b7 | 193 | unsigned int i; |
b1b942b7 | 194 | |
6c6a4439 | 195 | SCM_VALIDATE_VM_FRAME (1, frame); |
b1b942b7 | 196 | SCM_VALIDATE_UINT_COPY (2, index, i); |
b1b942b7 | 197 | |
b636cdb0 | 198 | fp = SCM_VM_FRAME_FP (frame); |
6c6a4439 | 199 | sp = SCM_VM_FRAME_SP (frame); |
f8085163 | 200 | |
b636cdb0 AW |
201 | if (i < SCM_FRAME_NUM_LOCALS (fp, sp)) |
202 | return SCM_FRAME_LOCAL (fp, i); | |
f8085163 | 203 | |
6c6a4439 | 204 | SCM_OUT_OF_RANGE (SCM_ARG2, index); |
af988bbf KN |
205 | } |
206 | #undef FUNC_NAME | |
ac99cb0c | 207 | |
aa3f6951 AW |
208 | /* Need same not-yet-active frame logic here as in frame-num-locals */ |
209 | SCM_DEFINE (scm_frame_local_set_x, "frame-local-set!", 3, 0, 0, | |
af988bbf KN |
210 | (SCM frame, SCM index, SCM val), |
211 | "") | |
aa3f6951 | 212 | #define FUNC_NAME s_scm_frame_local_set_x |
af988bbf | 213 | { |
b636cdb0 | 214 | SCM *fp, *sp; |
b1b942b7 | 215 | unsigned int i; |
b1b942b7 | 216 | |
6c6a4439 | 217 | SCM_VALIDATE_VM_FRAME (1, frame); |
b1b942b7 | 218 | SCM_VALIDATE_UINT_COPY (2, index, i); |
b1b942b7 | 219 | |
b636cdb0 | 220 | fp = SCM_VM_FRAME_FP (frame); |
6c6a4439 | 221 | sp = SCM_VM_FRAME_SP (frame); |
f8085163 | 222 | |
b636cdb0 | 223 | if (i < SCM_FRAME_NUM_LOCALS (fp, sp)) |
6c6a4439 | 224 | { |
b636cdb0 | 225 | SCM_FRAME_LOCAL (fp, i) = val; |
f8085163 | 226 | return SCM_UNSPECIFIED; |
6c6a4439 | 227 | } |
f8085163 | 228 | |
6c6a4439 AW |
229 | SCM_OUT_OF_RANGE (SCM_ARG2, index); |
230 | } | |
231 | #undef FUNC_NAME | |
b1b942b7 | 232 | |
2e30f398 AW |
233 | SCM_DEFINE (scm_frame_address, "frame-address", 1, 0, 0, |
234 | (SCM frame), | |
235 | "Return the frame pointer for @var{frame}.") | |
236 | #define FUNC_NAME s_scm_frame_address | |
237 | { | |
238 | SCM_VALIDATE_VM_FRAME (1, frame); | |
72b82b0f | 239 | return scm_from_uintptr_t ((scm_t_uintptr) SCM_VM_FRAME_FP (frame)); |
2e30f398 AW |
240 | } |
241 | #undef FUNC_NAME | |
242 | ||
542f975e AW |
243 | SCM_DEFINE (scm_frame_stack_pointer, "frame-stack-pointer", 1, 0, 0, |
244 | (SCM frame), | |
245 | "") | |
246 | #define FUNC_NAME s_scm_frame_stack_pointer | |
247 | { | |
248 | SCM_VALIDATE_VM_FRAME (1, frame); | |
249 | ||
72b82b0f | 250 | return scm_from_uintptr_t ((scm_t_uintptr) SCM_VM_FRAME_SP (frame)); |
542f975e AW |
251 | } |
252 | #undef FUNC_NAME | |
253 | ||
aa3f6951 | 254 | SCM_DEFINE (scm_frame_instruction_pointer, "frame-instruction-pointer", 1, 0, 0, |
6c6a4439 AW |
255 | (SCM frame), |
256 | "") | |
aa3f6951 | 257 | #define FUNC_NAME s_scm_frame_instruction_pointer |
6c6a4439 AW |
258 | { |
259 | SCM_VALIDATE_VM_FRAME (1, frame); | |
67b699cc | 260 | |
581a4eb8 | 261 | return scm_from_uintptr_t ((scm_t_uintptr) SCM_VM_FRAME_IP (frame)); |
ac99cb0c KN |
262 | } |
263 | #undef FUNC_NAME | |
264 | ||
aa3f6951 | 265 | SCM_DEFINE (scm_frame_return_address, "frame-return-address", 1, 0, 0, |
ac99cb0c KN |
266 | (SCM frame), |
267 | "") | |
aa3f6951 | 268 | #define FUNC_NAME s_scm_frame_return_address |
ac99cb0c | 269 | { |
b1b942b7 | 270 | SCM_VALIDATE_VM_FRAME (1, frame); |
72b82b0f AW |
271 | return scm_from_uintptr_t ((scm_t_uintptr) (SCM_FRAME_RETURN_ADDRESS |
272 | (SCM_VM_FRAME_FP (frame)))); | |
ac99cb0c KN |
273 | } |
274 | #undef FUNC_NAME | |
275 | ||
44d97054 AW |
276 | #define RELOC(kind, frame, val) \ |
277 | (((SCM *) (val)) + frame_offset (kind, frame)) | |
278 | ||
aa3f6951 | 279 | SCM_DEFINE (scm_frame_dynamic_link, "frame-dynamic-link", 1, 0, 0, |
ac99cb0c KN |
280 | (SCM frame), |
281 | "") | |
aa3f6951 | 282 | #define FUNC_NAME s_scm_frame_dynamic_link |
ac99cb0c | 283 | { |
b1b942b7 AW |
284 | SCM_VALIDATE_VM_FRAME (1, frame); |
285 | /* fixme: munge fp if holder is a continuation */ | |
72b82b0f AW |
286 | return scm_from_uintptr_t |
287 | ((scm_t_uintptr) | |
44d97054 | 288 | RELOC (SCM_VM_FRAME_KIND (frame), SCM_VM_FRAME_DATA (frame), |
b1b942b7 | 289 | SCM_FRAME_DYNAMIC_LINK (SCM_VM_FRAME_FP (frame)))); |
ac99cb0c KN |
290 | } |
291 | #undef FUNC_NAME | |
292 | ||
44d97054 AW |
293 | int |
294 | scm_c_frame_previous (enum scm_vm_frame_kind kind, struct scm_frame *frame) | |
b1b942b7 AW |
295 | { |
296 | SCM *this_fp, *new_fp, *new_sp; | |
da874e54 | 297 | SCM proc; |
93dbc31b | 298 | |
93dbc31b | 299 | again: |
44d97054 | 300 | this_fp = frame->fp_offset + frame_stack_base (kind, frame); |
b1b942b7 AW |
301 | new_fp = SCM_FRAME_DYNAMIC_LINK (this_fp); |
302 | if (new_fp) | |
da874e54 | 303 | { |
44d97054 AW |
304 | SCM *stack_base = frame_stack_base (kind, frame); |
305 | new_fp = RELOC (kind, frame, new_fp); | |
b636cdb0 | 306 | new_sp = SCM_FRAME_PREVIOUS_SP (this_fp); |
44d97054 AW |
307 | frame->fp_offset = new_fp - stack_base; |
308 | frame->sp_offset = new_sp - stack_base; | |
309 | frame->ip = SCM_FRAME_RETURN_ADDRESS (this_fp); | |
310 | ||
311 | proc = SCM_FRAME_PROGRAM (new_fp); | |
da874e54 | 312 | |
d798a895 | 313 | if (SCM_PROGRAM_P (proc) && SCM_PROGRAM_IS_BOOT (proc)) |
93dbc31b AW |
314 | goto again; |
315 | else | |
44d97054 | 316 | return 1; |
b1b942b7 AW |
317 | } |
318 | else | |
44d97054 AW |
319 | return 0; |
320 | } | |
321 | ||
322 | SCM_DEFINE (scm_frame_previous, "frame-previous", 1, 0, 0, | |
323 | (SCM frame), | |
324 | "") | |
325 | #define FUNC_NAME s_scm_frame_previous | |
326 | { | |
327 | enum scm_vm_frame_kind kind; | |
328 | struct scm_frame tmp; | |
329 | ||
330 | SCM_VALIDATE_VM_FRAME (1, frame); | |
331 | ||
332 | kind = SCM_VM_FRAME_KIND (frame); | |
333 | memcpy (&tmp, SCM_VM_FRAME_DATA (frame), sizeof tmp); | |
334 | ||
335 | if (!scm_c_frame_previous (SCM_VM_FRAME_KIND (frame), &tmp)) | |
b1b942b7 | 336 | return SCM_BOOL_F; |
44d97054 | 337 | |
8de051da | 338 | return scm_c_make_frame (kind, &tmp); |
b1b942b7 | 339 | } |
93dbc31b | 340 | #undef FUNC_NAME |
b1b942b7 | 341 | |
ac99cb0c | 342 | \f |
07e56b27 AW |
343 | void |
344 | scm_init_frames (void) | |
345 | { | |
ac99cb0c | 346 | #ifndef SCM_MAGIC_SNARFER |
aeeff258 | 347 | #include "libguile/frames.x" |
ac99cb0c KN |
348 | #endif |
349 | } | |
350 | ||
351 | /* | |
352 | Local Variables: | |
353 | c-file-style: "gnu" | |
354 | End: | |
355 | */ |