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f8fb13ef | 1 | /* Copyright (C) 2001, 2009, 2010, 2011, 2012, 2013 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 | |
0fc9040f LC |
36 | #define RELOC(frame, val) \ |
37 | (((SCM *) (val)) + SCM_VM_FRAME_OFFSET (frame)) | |
ac99cb0c KN |
38 | |
39 | SCM | |
89b235af AW |
40 | scm_c_make_frame (SCM stack_holder, scm_t_ptrdiff fp_offset, |
41 | scm_t_ptrdiff sp_offset, scm_t_uint32 *ip) | |
ac99cb0c | 42 | { |
aa3f6951 AW |
43 | struct scm_frame *p = scm_gc_malloc (sizeof (struct scm_frame), |
44 | "vmframe"); | |
b1b942b7 | 45 | p->stack_holder = stack_holder; |
89b235af AW |
46 | p->fp_offset = fp_offset; |
47 | p->sp_offset = sp_offset; | |
b1b942b7 | 48 | p->ip = ip; |
6f3b0cc2 | 49 | return scm_cell (scm_tc7_frame, (scm_t_bits)p); |
ac99cb0c KN |
50 | } |
51 | ||
6f3b0cc2 AW |
52 | void |
53 | scm_i_frame_print (SCM frame, SCM port, scm_print_state *pstate) | |
2f9769b6 | 54 | { |
0607ebbf | 55 | scm_puts_unlocked ("#<frame ", port); |
2f9769b6 | 56 | scm_uintprint (SCM_UNPACK (frame), 16, port); |
0607ebbf | 57 | scm_putc_unlocked (' ', port); |
aa3f6951 | 58 | scm_write (scm_frame_procedure (frame), port); |
2f9769b6 | 59 | /* don't write args, they can get us into trouble. */ |
0607ebbf | 60 | scm_puts_unlocked (">", port); |
2f9769b6 AW |
61 | } |
62 | ||
89b235af AW |
63 | SCM* |
64 | scm_i_frame_stack_base (SCM frame) | |
65 | #define FUNC_NAME "frame-stack-base" | |
66 | { | |
67 | SCM stack_holder; | |
68 | ||
69 | SCM_VALIDATE_VM_FRAME (1, frame); | |
70 | ||
71 | stack_holder = SCM_VM_FRAME_STACK_HOLDER (frame); | |
72 | ||
73 | if (SCM_VM_CONT_P (stack_holder)) | |
74 | return SCM_VM_CONT_DATA (stack_holder)->stack_base; | |
75 | ||
76 | return SCM_VM_DATA (stack_holder)->stack_base; | |
77 | } | |
78 | #undef FUNC_NAME | |
79 | ||
80 | ||
81 | scm_t_ptrdiff | |
82 | scm_i_frame_offset (SCM frame) | |
83 | #define FUNC_NAME "frame-offset" | |
84 | { | |
85 | SCM stack_holder; | |
86 | ||
87 | SCM_VALIDATE_VM_FRAME (1, frame); | |
88 | ||
89 | stack_holder = SCM_VM_FRAME_STACK_HOLDER (frame); | |
90 | ||
91 | if (SCM_VM_CONT_P (stack_holder)) | |
92 | return SCM_VM_CONT_DATA (stack_holder)->reloc; | |
93 | ||
94 | return 0; | |
95 | } | |
96 | #undef FUNC_NAME | |
97 | ||
3d94d862 | 98 | \f |
ac99cb0c KN |
99 | /* Scheme interface */ |
100 | ||
aa3f6951 | 101 | SCM_DEFINE (scm_frame_p, "frame?", 1, 0, 0, |
ac99cb0c KN |
102 | (SCM obj), |
103 | "") | |
aa3f6951 | 104 | #define FUNC_NAME s_scm_frame_p |
ac99cb0c | 105 | { |
5c8cefe5 | 106 | return scm_from_bool (SCM_VM_FRAME_P (obj)); |
b1b942b7 AW |
107 | } |
108 | #undef FUNC_NAME | |
109 | ||
aa3f6951 | 110 | SCM_DEFINE (scm_frame_procedure, "frame-procedure", 1, 0, 0, |
b1b942b7 AW |
111 | (SCM frame), |
112 | "") | |
aa3f6951 | 113 | #define FUNC_NAME s_scm_frame_procedure |
b1b942b7 AW |
114 | { |
115 | SCM_VALIDATE_VM_FRAME (1, frame); | |
116 | return SCM_FRAME_PROGRAM (SCM_VM_FRAME_FP (frame)); | |
117 | } | |
118 | #undef FUNC_NAME | |
119 | ||
aa3f6951 AW |
120 | SCM_DEFINE (scm_frame_arguments, "frame-arguments", 1, 0, 0, |
121 | (SCM frame), | |
122 | "") | |
123 | #define FUNC_NAME s_scm_frame_arguments | |
b1b942b7 | 124 | { |
6c6a4439 | 125 | static SCM var = SCM_BOOL_F; |
b1b942b7 AW |
126 | |
127 | SCM_VALIDATE_VM_FRAME (1, frame); | |
128 | ||
6c6a4439 AW |
129 | if (scm_is_false (var)) |
130 | var = scm_c_module_lookup (scm_c_resolve_module ("system vm frame"), | |
aa3f6951 | 131 | "frame-arguments"); |
b1b942b7 | 132 | |
6c6a4439 | 133 | return scm_call_1 (SCM_VARIABLE_REF (var), frame); |
ac99cb0c KN |
134 | } |
135 | #undef FUNC_NAME | |
136 | ||
423fca76 AW |
137 | SCM_DEFINE (scm_frame_source, "frame-source", 1, 0, 0, |
138 | (SCM frame), | |
139 | "") | |
140 | #define FUNC_NAME s_scm_frame_source | |
ac99cb0c | 141 | { |
423fca76 | 142 | SCM_VALIDATE_VM_FRAME (1, frame); |
b1b942b7 | 143 | |
581a4eb8 | 144 | return scm_find_source_for_addr (scm_frame_instruction_pointer (frame)); |
ac99cb0c | 145 | } |
423fca76 | 146 | #undef FUNC_NAME |
ac99cb0c | 147 | |
aa3f6951 | 148 | SCM_DEFINE (scm_frame_num_locals, "frame-num-locals", 1, 0, 0, |
6c6a4439 AW |
149 | (SCM frame), |
150 | "") | |
aa3f6951 | 151 | #define FUNC_NAME s_scm_frame_num_locals |
6c6a4439 | 152 | { |
b636cdb0 | 153 | SCM *fp, *sp; |
6c6a4439 AW |
154 | |
155 | SCM_VALIDATE_VM_FRAME (1, frame); | |
156 | ||
b636cdb0 | 157 | fp = SCM_VM_FRAME_FP (frame); |
510ca126 | 158 | sp = SCM_VM_FRAME_SP (frame); |
510ca126 | 159 | |
b636cdb0 | 160 | return scm_from_ptrdiff_t (SCM_FRAME_NUM_LOCALS (fp, sp)); |
6c6a4439 AW |
161 | } |
162 | #undef FUNC_NAME | |
163 | ||
aa3f6951 | 164 | SCM_DEFINE (scm_frame_local_ref, "frame-local-ref", 2, 0, 0, |
af988bbf | 165 | (SCM frame, SCM index), |
ac99cb0c | 166 | "") |
aa3f6951 | 167 | #define FUNC_NAME s_scm_frame_local_ref |
ac99cb0c | 168 | { |
b636cdb0 | 169 | SCM *fp, *sp; |
b1b942b7 | 170 | unsigned int i; |
b1b942b7 | 171 | |
6c6a4439 | 172 | SCM_VALIDATE_VM_FRAME (1, frame); |
b1b942b7 | 173 | SCM_VALIDATE_UINT_COPY (2, index, i); |
b1b942b7 | 174 | |
b636cdb0 | 175 | fp = SCM_VM_FRAME_FP (frame); |
6c6a4439 | 176 | sp = SCM_VM_FRAME_SP (frame); |
f8085163 | 177 | |
b636cdb0 AW |
178 | if (i < SCM_FRAME_NUM_LOCALS (fp, sp)) |
179 | return SCM_FRAME_LOCAL (fp, i); | |
f8085163 | 180 | |
6c6a4439 | 181 | SCM_OUT_OF_RANGE (SCM_ARG2, index); |
af988bbf KN |
182 | } |
183 | #undef FUNC_NAME | |
ac99cb0c | 184 | |
aa3f6951 AW |
185 | /* Need same not-yet-active frame logic here as in frame-num-locals */ |
186 | SCM_DEFINE (scm_frame_local_set_x, "frame-local-set!", 3, 0, 0, | |
af988bbf KN |
187 | (SCM frame, SCM index, SCM val), |
188 | "") | |
aa3f6951 | 189 | #define FUNC_NAME s_scm_frame_local_set_x |
af988bbf | 190 | { |
b636cdb0 | 191 | SCM *fp, *sp; |
b1b942b7 | 192 | unsigned int i; |
b1b942b7 | 193 | |
6c6a4439 | 194 | SCM_VALIDATE_VM_FRAME (1, frame); |
b1b942b7 | 195 | SCM_VALIDATE_UINT_COPY (2, index, i); |
b1b942b7 | 196 | |
b636cdb0 | 197 | fp = SCM_VM_FRAME_FP (frame); |
6c6a4439 | 198 | sp = SCM_VM_FRAME_SP (frame); |
f8085163 | 199 | |
b636cdb0 | 200 | if (i < SCM_FRAME_NUM_LOCALS (fp, sp)) |
6c6a4439 | 201 | { |
b636cdb0 | 202 | SCM_FRAME_LOCAL (fp, i) = val; |
f8085163 | 203 | return SCM_UNSPECIFIED; |
6c6a4439 | 204 | } |
f8085163 | 205 | |
6c6a4439 AW |
206 | SCM_OUT_OF_RANGE (SCM_ARG2, index); |
207 | } | |
208 | #undef FUNC_NAME | |
b1b942b7 | 209 | |
2e30f398 AW |
210 | SCM_DEFINE (scm_frame_address, "frame-address", 1, 0, 0, |
211 | (SCM frame), | |
212 | "Return the frame pointer for @var{frame}.") | |
213 | #define FUNC_NAME s_scm_frame_address | |
214 | { | |
215 | SCM_VALIDATE_VM_FRAME (1, frame); | |
72b82b0f | 216 | return scm_from_uintptr_t ((scm_t_uintptr) SCM_VM_FRAME_FP (frame)); |
2e30f398 AW |
217 | } |
218 | #undef FUNC_NAME | |
219 | ||
542f975e AW |
220 | SCM_DEFINE (scm_frame_stack_pointer, "frame-stack-pointer", 1, 0, 0, |
221 | (SCM frame), | |
222 | "") | |
223 | #define FUNC_NAME s_scm_frame_stack_pointer | |
224 | { | |
225 | SCM_VALIDATE_VM_FRAME (1, frame); | |
226 | ||
72b82b0f | 227 | return scm_from_uintptr_t ((scm_t_uintptr) SCM_VM_FRAME_SP (frame)); |
542f975e AW |
228 | } |
229 | #undef FUNC_NAME | |
230 | ||
aa3f6951 | 231 | SCM_DEFINE (scm_frame_instruction_pointer, "frame-instruction-pointer", 1, 0, 0, |
6c6a4439 AW |
232 | (SCM frame), |
233 | "") | |
aa3f6951 | 234 | #define FUNC_NAME s_scm_frame_instruction_pointer |
6c6a4439 AW |
235 | { |
236 | SCM_VALIDATE_VM_FRAME (1, frame); | |
67b699cc | 237 | |
581a4eb8 | 238 | return scm_from_uintptr_t ((scm_t_uintptr) SCM_VM_FRAME_IP (frame)); |
ac99cb0c KN |
239 | } |
240 | #undef FUNC_NAME | |
241 | ||
aa3f6951 | 242 | SCM_DEFINE (scm_frame_return_address, "frame-return-address", 1, 0, 0, |
ac99cb0c KN |
243 | (SCM frame), |
244 | "") | |
aa3f6951 | 245 | #define FUNC_NAME s_scm_frame_return_address |
ac99cb0c | 246 | { |
b1b942b7 | 247 | SCM_VALIDATE_VM_FRAME (1, frame); |
72b82b0f AW |
248 | return scm_from_uintptr_t ((scm_t_uintptr) (SCM_FRAME_RETURN_ADDRESS |
249 | (SCM_VM_FRAME_FP (frame)))); | |
ac99cb0c KN |
250 | } |
251 | #undef FUNC_NAME | |
252 | ||
aa3f6951 | 253 | SCM_DEFINE (scm_frame_dynamic_link, "frame-dynamic-link", 1, 0, 0, |
ac99cb0c KN |
254 | (SCM frame), |
255 | "") | |
aa3f6951 | 256 | #define FUNC_NAME s_scm_frame_dynamic_link |
ac99cb0c | 257 | { |
b1b942b7 AW |
258 | SCM_VALIDATE_VM_FRAME (1, frame); |
259 | /* fixme: munge fp if holder is a continuation */ | |
72b82b0f AW |
260 | return scm_from_uintptr_t |
261 | ((scm_t_uintptr) | |
b1b942b7 AW |
262 | RELOC (frame, |
263 | SCM_FRAME_DYNAMIC_LINK (SCM_VM_FRAME_FP (frame)))); | |
ac99cb0c KN |
264 | } |
265 | #undef FUNC_NAME | |
266 | ||
93dbc31b AW |
267 | SCM_DEFINE (scm_frame_previous, "frame-previous", 1, 0, 0, |
268 | (SCM frame), | |
269 | "") | |
270 | #define FUNC_NAME s_scm_frame_previous | |
b1b942b7 AW |
271 | { |
272 | SCM *this_fp, *new_fp, *new_sp; | |
da874e54 | 273 | SCM proc; |
93dbc31b AW |
274 | |
275 | SCM_VALIDATE_VM_FRAME (1, frame); | |
276 | ||
277 | again: | |
b1b942b7 AW |
278 | this_fp = SCM_VM_FRAME_FP (frame); |
279 | new_fp = SCM_FRAME_DYNAMIC_LINK (this_fp); | |
280 | if (new_fp) | |
da874e54 | 281 | { |
89b235af | 282 | SCM *stack_base = scm_i_frame_stack_base (frame); |
da874e54 | 283 | new_fp = RELOC (frame, new_fp); |
b636cdb0 | 284 | new_sp = SCM_FRAME_PREVIOUS_SP (this_fp); |
93dbc31b | 285 | frame = scm_c_make_frame (SCM_VM_FRAME_STACK_HOLDER (frame), |
89b235af AW |
286 | new_fp - stack_base, new_sp - stack_base, |
287 | SCM_FRAME_RETURN_ADDRESS (this_fp)); | |
da874e54 AW |
288 | proc = scm_frame_procedure (frame); |
289 | ||
d798a895 | 290 | if (SCM_PROGRAM_P (proc) && SCM_PROGRAM_IS_BOOT (proc)) |
93dbc31b AW |
291 | goto again; |
292 | else | |
293 | return frame; | |
b1b942b7 AW |
294 | } |
295 | else | |
296 | return SCM_BOOL_F; | |
297 | } | |
93dbc31b | 298 | #undef FUNC_NAME |
b1b942b7 | 299 | |
ac99cb0c | 300 | \f |
07e56b27 AW |
301 | void |
302 | scm_init_frames (void) | |
303 | { | |
ac99cb0c | 304 | #ifndef SCM_MAGIC_SNARFER |
aeeff258 | 305 | #include "libguile/frames.x" |
ac99cb0c KN |
306 | #endif |
307 | } | |
308 | ||
309 | /* | |
310 | Local Variables: | |
311 | c-file-style: "gnu" | |
312 | End: | |
313 | */ |