Commit | Line | Data |
---|---|---|
97b58163 | 1 | /* |
04aa13f8 | 2 | * lttng-bytecode-validator.c |
97b58163 | 3 | * |
04aa13f8 | 4 | * LTTng UST bytecode validator. |
97b58163 | 5 | * |
7e50015d | 6 | * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
97b58163 | 7 | * |
7e50015d MD |
8 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
9 | * of this software and associated documentation files (the "Software"), to deal | |
10 | * in the Software without restriction, including without limitation the rights | |
11 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
12 | * copies of the Software, and to permit persons to whom the Software is | |
13 | * furnished to do so, subject to the following conditions: | |
97b58163 | 14 | * |
7e50015d MD |
15 | * The above copyright notice and this permission notice shall be included in |
16 | * all copies or substantial portions of the Software. | |
97b58163 | 17 | * |
7e50015d MD |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
21 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
22 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
23 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
24 | * SOFTWARE. | |
97b58163 MD |
25 | */ |
26 | ||
bf956ec0 | 27 | #define _LGPL_SOURCE |
b4051ad8 | 28 | #include <stddef.h> |
fb31eb73 | 29 | #include <stdint.h> |
bf956ec0 | 30 | #include <time.h> |
97b58163 | 31 | |
fb31eb73 | 32 | #include <urcu-bp.h> |
bf956ec0 | 33 | #include <urcu/rculfhash.h> |
fb31eb73 | 34 | |
04aa13f8 | 35 | #include "lttng-bytecode.h" |
bf956ec0 | 36 | #include "lttng-hash-helper.h" |
3151a51d | 37 | #include "string-utils.h" |
92495593 | 38 | #include "ust-events-internal.h" |
bf956ec0 | 39 | |
0305960f MD |
40 | /* |
41 | * Number of merge points for hash table size. Hash table initialized to | |
42 | * that size, and we do not resize, because we do not want to trigger | |
43 | * RCU worker thread execution: fall-back on linear traversal if number | |
44 | * of merge points exceeds this value. | |
45 | */ | |
46 | #define DEFAULT_NR_MERGE_POINTS 128 | |
47 | #define MIN_NR_BUCKETS 128 | |
48 | #define MAX_NR_BUCKETS 128 | |
49 | ||
bf956ec0 MD |
50 | /* merge point table node */ |
51 | struct lfht_mp_node { | |
52 | struct cds_lfht_node node; | |
53 | ||
54 | /* Context at merge point */ | |
0305960f | 55 | struct vstack stack; |
bf956ec0 MD |
56 | unsigned long target_pc; |
57 | }; | |
58 | ||
59 | static unsigned long lttng_hash_seed; | |
60 | static unsigned int lttng_hash_seed_ready; | |
61 | ||
62 | static | |
63 | int lttng_hash_match(struct cds_lfht_node *node, const void *key) | |
64 | { | |
65 | struct lfht_mp_node *mp_node = | |
66 | caa_container_of(node, struct lfht_mp_node, node); | |
67 | unsigned long key_pc = (unsigned long) key; | |
68 | ||
69 | if (mp_node->target_pc == key_pc) | |
70 | return 1; | |
71 | else | |
72 | return 0; | |
73 | } | |
74 | ||
75 | static | |
71c1ceeb MD |
76 | int merge_points_compare(const struct vstack *stacka, |
77 | const struct vstack *stackb) | |
78 | { | |
79 | int i, len; | |
80 | ||
81 | if (stacka->top != stackb->top) | |
82 | return 1; | |
83 | len = stacka->top + 1; | |
84 | assert(len >= 0); | |
85 | for (i = 0; i < len; i++) { | |
53569322 MD |
86 | if (stacka->e[i].type != REG_UNKNOWN |
87 | && stackb->e[i].type != REG_UNKNOWN | |
88 | && stacka->e[i].type != stackb->e[i].type) | |
71c1ceeb MD |
89 | return 1; |
90 | } | |
91 | return 0; | |
92 | } | |
93 | ||
94 | static | |
95 | int merge_point_add_check(struct cds_lfht *ht, unsigned long target_pc, | |
0305960f | 96 | const struct vstack *stack) |
bf956ec0 MD |
97 | { |
98 | struct lfht_mp_node *node; | |
22389ecb | 99 | unsigned long hash = lttng_hash_mix((const char *) target_pc, |
bf956ec0 MD |
100 | sizeof(target_pc), |
101 | lttng_hash_seed); | |
71c1ceeb | 102 | struct cds_lfht_node *ret; |
bf956ec0 | 103 | |
04aa13f8 | 104 | dbg_printf("Bytecode: adding merge point at offset %lu, hash %lu\n", |
bf956ec0 MD |
105 | target_pc, hash); |
106 | node = zmalloc(sizeof(struct lfht_mp_node)); | |
107 | if (!node) | |
108 | return -ENOMEM; | |
109 | node->target_pc = target_pc; | |
0305960f | 110 | memcpy(&node->stack, stack, sizeof(node->stack)); |
71c1ceeb | 111 | ret = cds_lfht_add_unique(ht, hash, lttng_hash_match, |
22389ecb | 112 | (const char *) target_pc, &node->node); |
71c1ceeb MD |
113 | if (ret != &node->node) { |
114 | struct lfht_mp_node *ret_mp = | |
115 | caa_container_of(ret, struct lfht_mp_node, node); | |
116 | ||
117 | /* Key already present */ | |
04aa13f8 | 118 | dbg_printf("Bytecode: compare merge points for offset %lu, hash %lu\n", |
71c1ceeb MD |
119 | target_pc, hash); |
120 | free(node); | |
121 | if (merge_points_compare(stack, &ret_mp->stack)) { | |
122 | ERR("Merge points differ for offset %lu\n", | |
123 | target_pc); | |
124 | return -EINVAL; | |
125 | } | |
126 | } | |
bf956ec0 MD |
127 | return 0; |
128 | } | |
129 | ||
130 | /* | |
0305960f | 131 | * Binary comparators use top of stack and top of stack -1. |
53569322 MD |
132 | * Return 0 if typing is known to match, 1 if typing is dynamic |
133 | * (unknown), negative error value on error. | |
bf956ec0 | 134 | */ |
97b58163 | 135 | static |
04aa13f8 | 136 | int bin_op_compare_check(struct vstack *stack, bytecode_opcode_t opcode, |
3151a51d | 137 | const char *str) |
97b58163 | 138 | { |
0305960f | 139 | if (unlikely(!vstack_ax(stack) || !vstack_bx(stack))) |
53569322 | 140 | goto error_empty; |
0305960f MD |
141 | |
142 | switch (vstack_ax(stack)->type) { | |
97b58163 | 143 | default: |
53569322 | 144 | goto error_type; |
97b58163 | 145 | |
53569322 MD |
146 | case REG_UNKNOWN: |
147 | goto unknown; | |
97b58163 | 148 | case REG_STRING: |
0305960f | 149 | switch (vstack_bx(stack)->type) { |
97b58163 | 150 | default: |
53569322 | 151 | goto error_type; |
97b58163 | 152 | |
53569322 MD |
153 | case REG_UNKNOWN: |
154 | goto unknown; | |
97b58163 MD |
155 | case REG_STRING: |
156 | break; | |
3151a51d | 157 | case REG_STAR_GLOB_STRING: |
04aa13f8 | 158 | if (opcode != BYTECODE_OP_EQ && opcode != BYTECODE_OP_NE) { |
3151a51d PP |
159 | goto error_mismatch; |
160 | } | |
161 | break; | |
162 | case REG_S64: | |
d97f9b78 | 163 | case REG_U64: |
3151a51d PP |
164 | case REG_DOUBLE: |
165 | goto error_mismatch; | |
166 | } | |
167 | break; | |
168 | case REG_STAR_GLOB_STRING: | |
169 | switch (vstack_bx(stack)->type) { | |
170 | default: | |
171 | goto error_type; | |
172 | ||
173 | case REG_UNKNOWN: | |
174 | goto unknown; | |
175 | case REG_STRING: | |
04aa13f8 | 176 | if (opcode != BYTECODE_OP_EQ && opcode != BYTECODE_OP_NE) { |
3151a51d PP |
177 | goto error_mismatch; |
178 | } | |
179 | break; | |
180 | case REG_STAR_GLOB_STRING: | |
97b58163 | 181 | case REG_S64: |
d97f9b78 | 182 | case REG_U64: |
97b58163 MD |
183 | case REG_DOUBLE: |
184 | goto error_mismatch; | |
185 | } | |
186 | break; | |
187 | case REG_S64: | |
d97f9b78 | 188 | case REG_U64: |
97b58163 | 189 | case REG_DOUBLE: |
0305960f | 190 | switch (vstack_bx(stack)->type) { |
97b58163 | 191 | default: |
53569322 | 192 | goto error_type; |
97b58163 | 193 | |
53569322 MD |
194 | case REG_UNKNOWN: |
195 | goto unknown; | |
97b58163 | 196 | case REG_STRING: |
3151a51d | 197 | case REG_STAR_GLOB_STRING: |
97b58163 | 198 | goto error_mismatch; |
97b58163 | 199 | case REG_S64: |
d97f9b78 | 200 | case REG_U64: |
97b58163 MD |
201 | case REG_DOUBLE: |
202 | break; | |
203 | } | |
204 | break; | |
205 | } | |
206 | return 0; | |
207 | ||
53569322 MD |
208 | unknown: |
209 | return 1; | |
0305960f | 210 | |
97b58163 MD |
211 | error_mismatch: |
212 | ERR("type mismatch for '%s' binary operator\n", str); | |
213 | return -EINVAL; | |
53569322 MD |
214 | |
215 | error_empty: | |
216 | ERR("empty stack for '%s' binary operator\n", str); | |
217 | return -EINVAL; | |
218 | ||
219 | error_type: | |
220 | ERR("unknown type for '%s' binary operator\n", str); | |
221 | return -EINVAL; | |
97b58163 MD |
222 | } |
223 | ||
47e5f13e MD |
224 | /* |
225 | * Binary bitwise operators use top of stack and top of stack -1. | |
226 | * Return 0 if typing is known to match, 1 if typing is dynamic | |
227 | * (unknown), negative error value on error. | |
228 | */ | |
229 | static | |
04aa13f8 | 230 | int bin_op_bitwise_check(struct vstack *stack, bytecode_opcode_t opcode, |
47e5f13e MD |
231 | const char *str) |
232 | { | |
233 | if (unlikely(!vstack_ax(stack) || !vstack_bx(stack))) | |
234 | goto error_empty; | |
235 | ||
236 | switch (vstack_ax(stack)->type) { | |
237 | default: | |
238 | goto error_type; | |
239 | ||
240 | case REG_UNKNOWN: | |
241 | goto unknown; | |
242 | case REG_S64: | |
d97f9b78 | 243 | case REG_U64: |
47e5f13e MD |
244 | switch (vstack_bx(stack)->type) { |
245 | default: | |
246 | goto error_type; | |
247 | ||
248 | case REG_UNKNOWN: | |
249 | goto unknown; | |
250 | case REG_S64: | |
d97f9b78 | 251 | case REG_U64: |
47e5f13e MD |
252 | break; |
253 | } | |
254 | break; | |
255 | } | |
256 | return 0; | |
257 | ||
258 | unknown: | |
259 | return 1; | |
260 | ||
261 | error_empty: | |
262 | ERR("empty stack for '%s' binary operator\n", str); | |
263 | return -EINVAL; | |
264 | ||
265 | error_type: | |
266 | ERR("unknown type for '%s' binary operator\n", str); | |
267 | return -EINVAL; | |
268 | } | |
269 | ||
270 | static | |
271 | int validate_get_symbol(struct bytecode_runtime *bytecode, | |
272 | const struct get_symbol *sym) | |
273 | { | |
274 | const char *str, *str_limit; | |
275 | size_t len_limit; | |
276 | ||
277 | if (sym->offset >= bytecode->p.bc->bc.len - bytecode->p.bc->bc.reloc_offset) | |
278 | return -EINVAL; | |
279 | ||
280 | str = bytecode->p.bc->bc.data + bytecode->p.bc->bc.reloc_offset + sym->offset; | |
281 | str_limit = bytecode->p.bc->bc.data + bytecode->p.bc->bc.len; | |
282 | len_limit = str_limit - str; | |
283 | if (strnlen(str, len_limit) == len_limit) | |
284 | return -EINVAL; | |
285 | return 0; | |
286 | } | |
287 | ||
97b58163 MD |
288 | /* |
289 | * Validate bytecode range overflow within the validation pass. | |
290 | * Called for each instruction encountered. | |
291 | */ | |
292 | static | |
293 | int bytecode_validate_overflow(struct bytecode_runtime *bytecode, | |
22389ecb | 294 | char *start_pc, char *pc) |
97b58163 MD |
295 | { |
296 | int ret = 0; | |
297 | ||
04aa13f8 FD |
298 | switch (*(bytecode_opcode_t *) pc) { |
299 | case BYTECODE_OP_UNKNOWN: | |
97b58163 MD |
300 | default: |
301 | { | |
302 | ERR("unknown bytecode op %u\n", | |
04aa13f8 | 303 | (unsigned int) *(bytecode_opcode_t *) pc); |
97b58163 MD |
304 | ret = -EINVAL; |
305 | break; | |
306 | } | |
307 | ||
04aa13f8 FD |
308 | case BYTECODE_OP_RETURN: |
309 | case BYTECODE_OP_RETURN_S64: | |
97b58163 MD |
310 | { |
311 | if (unlikely(pc + sizeof(struct return_op) | |
312 | > start_pc + bytecode->len)) { | |
82513dbe | 313 | ret = -ERANGE; |
97b58163 MD |
314 | } |
315 | break; | |
316 | } | |
317 | ||
318 | /* binary */ | |
04aa13f8 FD |
319 | case BYTECODE_OP_MUL: |
320 | case BYTECODE_OP_DIV: | |
321 | case BYTECODE_OP_MOD: | |
322 | case BYTECODE_OP_PLUS: | |
323 | case BYTECODE_OP_MINUS: | |
97b58163 MD |
324 | { |
325 | ERR("unsupported bytecode op %u\n", | |
04aa13f8 | 326 | (unsigned int) *(bytecode_opcode_t *) pc); |
97b58163 MD |
327 | ret = -EINVAL; |
328 | break; | |
329 | } | |
330 | ||
04aa13f8 FD |
331 | case BYTECODE_OP_EQ: |
332 | case BYTECODE_OP_NE: | |
333 | case BYTECODE_OP_GT: | |
334 | case BYTECODE_OP_LT: | |
335 | case BYTECODE_OP_GE: | |
336 | case BYTECODE_OP_LE: | |
337 | case BYTECODE_OP_EQ_STRING: | |
338 | case BYTECODE_OP_NE_STRING: | |
339 | case BYTECODE_OP_GT_STRING: | |
340 | case BYTECODE_OP_LT_STRING: | |
341 | case BYTECODE_OP_GE_STRING: | |
342 | case BYTECODE_OP_LE_STRING: | |
343 | case BYTECODE_OP_EQ_STAR_GLOB_STRING: | |
344 | case BYTECODE_OP_NE_STAR_GLOB_STRING: | |
345 | case BYTECODE_OP_EQ_S64: | |
346 | case BYTECODE_OP_NE_S64: | |
347 | case BYTECODE_OP_GT_S64: | |
348 | case BYTECODE_OP_LT_S64: | |
349 | case BYTECODE_OP_GE_S64: | |
350 | case BYTECODE_OP_LE_S64: | |
351 | case BYTECODE_OP_EQ_DOUBLE: | |
352 | case BYTECODE_OP_NE_DOUBLE: | |
353 | case BYTECODE_OP_GT_DOUBLE: | |
354 | case BYTECODE_OP_LT_DOUBLE: | |
355 | case BYTECODE_OP_GE_DOUBLE: | |
356 | case BYTECODE_OP_LE_DOUBLE: | |
357 | case BYTECODE_OP_EQ_DOUBLE_S64: | |
358 | case BYTECODE_OP_NE_DOUBLE_S64: | |
359 | case BYTECODE_OP_GT_DOUBLE_S64: | |
360 | case BYTECODE_OP_LT_DOUBLE_S64: | |
361 | case BYTECODE_OP_GE_DOUBLE_S64: | |
362 | case BYTECODE_OP_LE_DOUBLE_S64: | |
363 | case BYTECODE_OP_EQ_S64_DOUBLE: | |
364 | case BYTECODE_OP_NE_S64_DOUBLE: | |
365 | case BYTECODE_OP_GT_S64_DOUBLE: | |
366 | case BYTECODE_OP_LT_S64_DOUBLE: | |
367 | case BYTECODE_OP_GE_S64_DOUBLE: | |
368 | case BYTECODE_OP_LE_S64_DOUBLE: | |
369 | case BYTECODE_OP_BIT_RSHIFT: | |
370 | case BYTECODE_OP_BIT_LSHIFT: | |
371 | case BYTECODE_OP_BIT_AND: | |
372 | case BYTECODE_OP_BIT_OR: | |
373 | case BYTECODE_OP_BIT_XOR: | |
97b58163 MD |
374 | { |
375 | if (unlikely(pc + sizeof(struct binary_op) | |
376 | > start_pc + bytecode->len)) { | |
82513dbe | 377 | ret = -ERANGE; |
97b58163 MD |
378 | } |
379 | break; | |
380 | } | |
381 | ||
382 | /* unary */ | |
04aa13f8 FD |
383 | case BYTECODE_OP_UNARY_PLUS: |
384 | case BYTECODE_OP_UNARY_MINUS: | |
385 | case BYTECODE_OP_UNARY_NOT: | |
386 | case BYTECODE_OP_UNARY_PLUS_S64: | |
387 | case BYTECODE_OP_UNARY_MINUS_S64: | |
388 | case BYTECODE_OP_UNARY_NOT_S64: | |
389 | case BYTECODE_OP_UNARY_PLUS_DOUBLE: | |
390 | case BYTECODE_OP_UNARY_MINUS_DOUBLE: | |
391 | case BYTECODE_OP_UNARY_NOT_DOUBLE: | |
392 | case BYTECODE_OP_UNARY_BIT_NOT: | |
97b58163 MD |
393 | { |
394 | if (unlikely(pc + sizeof(struct unary_op) | |
395 | > start_pc + bytecode->len)) { | |
82513dbe | 396 | ret = -ERANGE; |
97b58163 MD |
397 | } |
398 | break; | |
399 | } | |
400 | ||
401 | /* logical */ | |
04aa13f8 FD |
402 | case BYTECODE_OP_AND: |
403 | case BYTECODE_OP_OR: | |
97b58163 MD |
404 | { |
405 | if (unlikely(pc + sizeof(struct logical_op) | |
406 | > start_pc + bytecode->len)) { | |
82513dbe | 407 | ret = -ERANGE; |
97b58163 MD |
408 | } |
409 | break; | |
410 | } | |
411 | ||
77aa5901 | 412 | /* load field ref */ |
04aa13f8 | 413 | case BYTECODE_OP_LOAD_FIELD_REF: |
97b58163 MD |
414 | { |
415 | ERR("Unknown field ref type\n"); | |
416 | ret = -EINVAL; | |
417 | break; | |
418 | } | |
47e5f13e | 419 | |
77aa5901 | 420 | /* get context ref */ |
04aa13f8 FD |
421 | case BYTECODE_OP_GET_CONTEXT_REF: |
422 | case BYTECODE_OP_LOAD_FIELD_REF_STRING: | |
423 | case BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE: | |
424 | case BYTECODE_OP_LOAD_FIELD_REF_S64: | |
425 | case BYTECODE_OP_LOAD_FIELD_REF_DOUBLE: | |
426 | case BYTECODE_OP_GET_CONTEXT_REF_STRING: | |
427 | case BYTECODE_OP_GET_CONTEXT_REF_S64: | |
428 | case BYTECODE_OP_GET_CONTEXT_REF_DOUBLE: | |
97b58163 MD |
429 | { |
430 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct field_ref) | |
431 | > start_pc + bytecode->len)) { | |
82513dbe | 432 | ret = -ERANGE; |
97b58163 MD |
433 | } |
434 | break; | |
435 | } | |
436 | ||
77aa5901 | 437 | /* load from immediate operand */ |
04aa13f8 FD |
438 | case BYTECODE_OP_LOAD_STRING: |
439 | case BYTECODE_OP_LOAD_STAR_GLOB_STRING: | |
97b58163 MD |
440 | { |
441 | struct load_op *insn = (struct load_op *) pc; | |
442 | uint32_t str_len, maxlen; | |
443 | ||
444 | if (unlikely(pc + sizeof(struct load_op) | |
445 | > start_pc + bytecode->len)) { | |
82513dbe | 446 | ret = -ERANGE; |
97b58163 MD |
447 | break; |
448 | } | |
449 | ||
450 | maxlen = start_pc + bytecode->len - pc - sizeof(struct load_op); | |
451 | str_len = strnlen(insn->data, maxlen); | |
452 | if (unlikely(str_len >= maxlen)) { | |
453 | /* Final '\0' not found within range */ | |
82513dbe | 454 | ret = -ERANGE; |
97b58163 MD |
455 | } |
456 | break; | |
457 | } | |
458 | ||
04aa13f8 | 459 | case BYTECODE_OP_LOAD_S64: |
97b58163 MD |
460 | { |
461 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct literal_numeric) | |
462 | > start_pc + bytecode->len)) { | |
82513dbe | 463 | ret = -ERANGE; |
97b58163 MD |
464 | } |
465 | break; | |
466 | } | |
467 | ||
04aa13f8 | 468 | case BYTECODE_OP_LOAD_DOUBLE: |
97b58163 MD |
469 | { |
470 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct literal_double) | |
471 | > start_pc + bytecode->len)) { | |
82513dbe | 472 | ret = -ERANGE; |
97b58163 MD |
473 | } |
474 | break; | |
475 | } | |
476 | ||
04aa13f8 FD |
477 | case BYTECODE_OP_CAST_TO_S64: |
478 | case BYTECODE_OP_CAST_DOUBLE_TO_S64: | |
479 | case BYTECODE_OP_CAST_NOP: | |
97b58163 MD |
480 | { |
481 | if (unlikely(pc + sizeof(struct cast_op) | |
482 | > start_pc + bytecode->len)) { | |
82513dbe | 483 | ret = -ERANGE; |
97b58163 MD |
484 | } |
485 | break; | |
486 | } | |
77aa5901 | 487 | |
47e5f13e MD |
488 | /* |
489 | * Instructions for recursive traversal through composed types. | |
490 | */ | |
04aa13f8 FD |
491 | case BYTECODE_OP_GET_CONTEXT_ROOT: |
492 | case BYTECODE_OP_GET_APP_CONTEXT_ROOT: | |
493 | case BYTECODE_OP_GET_PAYLOAD_ROOT: | |
494 | case BYTECODE_OP_LOAD_FIELD: | |
495 | case BYTECODE_OP_LOAD_FIELD_S8: | |
496 | case BYTECODE_OP_LOAD_FIELD_S16: | |
497 | case BYTECODE_OP_LOAD_FIELD_S32: | |
498 | case BYTECODE_OP_LOAD_FIELD_S64: | |
499 | case BYTECODE_OP_LOAD_FIELD_U8: | |
500 | case BYTECODE_OP_LOAD_FIELD_U16: | |
501 | case BYTECODE_OP_LOAD_FIELD_U32: | |
502 | case BYTECODE_OP_LOAD_FIELD_U64: | |
503 | case BYTECODE_OP_LOAD_FIELD_STRING: | |
504 | case BYTECODE_OP_LOAD_FIELD_SEQUENCE: | |
505 | case BYTECODE_OP_LOAD_FIELD_DOUBLE: | |
47e5f13e MD |
506 | if (unlikely(pc + sizeof(struct load_op) |
507 | > start_pc + bytecode->len)) { | |
508 | ret = -ERANGE; | |
509 | } | |
510 | break; | |
511 | ||
04aa13f8 | 512 | case BYTECODE_OP_GET_SYMBOL: |
47e5f13e MD |
513 | { |
514 | struct load_op *insn = (struct load_op *) pc; | |
515 | struct get_symbol *sym = (struct get_symbol *) insn->data; | |
516 | ||
517 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct get_symbol) | |
518 | > start_pc + bytecode->len)) { | |
519 | ret = -ERANGE; | |
90732639 | 520 | break; |
47e5f13e MD |
521 | } |
522 | ret = validate_get_symbol(bytecode, sym); | |
523 | break; | |
524 | } | |
525 | ||
04aa13f8 | 526 | case BYTECODE_OP_GET_SYMBOL_FIELD: |
47e5f13e MD |
527 | ERR("Unexpected get symbol field"); |
528 | ret = -EINVAL; | |
529 | break; | |
530 | ||
04aa13f8 | 531 | case BYTECODE_OP_GET_INDEX_U16: |
47e5f13e MD |
532 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct get_index_u16) |
533 | > start_pc + bytecode->len)) { | |
534 | ret = -ERANGE; | |
535 | } | |
536 | break; | |
537 | ||
04aa13f8 | 538 | case BYTECODE_OP_GET_INDEX_U64: |
47e5f13e MD |
539 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct get_index_u64) |
540 | > start_pc + bytecode->len)) { | |
541 | ret = -ERANGE; | |
542 | } | |
543 | break; | |
97b58163 MD |
544 | } |
545 | ||
546 | return ret; | |
547 | } | |
548 | ||
bf956ec0 MD |
549 | static |
550 | unsigned long delete_all_nodes(struct cds_lfht *ht) | |
97b58163 | 551 | { |
bf956ec0 MD |
552 | struct cds_lfht_iter iter; |
553 | struct lfht_mp_node *node; | |
554 | unsigned long nr_nodes = 0; | |
97b58163 | 555 | |
bf956ec0 MD |
556 | cds_lfht_for_each_entry(ht, &iter, node, node) { |
557 | int ret; | |
558 | ||
559 | ret = cds_lfht_del(ht, cds_lfht_iter_get_node(&iter)); | |
560 | assert(!ret); | |
561 | /* note: this hash table is never used concurrently */ | |
562 | free(node); | |
563 | nr_nodes++; | |
97b58163 | 564 | } |
bf956ec0 MD |
565 | return nr_nodes; |
566 | } | |
97b58163 | 567 | |
bf956ec0 MD |
568 | /* |
569 | * Return value: | |
53569322 | 570 | * >=0: success |
bf956ec0 MD |
571 | * <0: error |
572 | */ | |
573 | static | |
574 | int validate_instruction_context(struct bytecode_runtime *bytecode, | |
0305960f | 575 | struct vstack *stack, |
22389ecb MD |
576 | char *start_pc, |
577 | char *pc) | |
bf956ec0 MD |
578 | { |
579 | int ret = 0; | |
04aa13f8 | 580 | const bytecode_opcode_t opcode = *(bytecode_opcode_t *) pc; |
bf956ec0 | 581 | |
3151a51d | 582 | switch (opcode) { |
04aa13f8 | 583 | case BYTECODE_OP_UNKNOWN: |
bf956ec0 MD |
584 | default: |
585 | { | |
586 | ERR("unknown bytecode op %u\n", | |
04aa13f8 | 587 | (unsigned int) *(bytecode_opcode_t *) pc); |
bf956ec0 MD |
588 | ret = -EINVAL; |
589 | goto end; | |
590 | } | |
591 | ||
04aa13f8 FD |
592 | case BYTECODE_OP_RETURN: |
593 | case BYTECODE_OP_RETURN_S64: | |
bf956ec0 MD |
594 | { |
595 | goto end; | |
596 | } | |
597 | ||
598 | /* binary */ | |
04aa13f8 FD |
599 | case BYTECODE_OP_MUL: |
600 | case BYTECODE_OP_DIV: | |
601 | case BYTECODE_OP_MOD: | |
602 | case BYTECODE_OP_PLUS: | |
603 | case BYTECODE_OP_MINUS: | |
bf956ec0 MD |
604 | { |
605 | ERR("unsupported bytecode op %u\n", | |
3151a51d | 606 | (unsigned int) opcode); |
bf956ec0 MD |
607 | ret = -EINVAL; |
608 | goto end; | |
609 | } | |
97b58163 | 610 | |
04aa13f8 | 611 | case BYTECODE_OP_EQ: |
bf956ec0 | 612 | { |
3151a51d | 613 | ret = bin_op_compare_check(stack, opcode, "=="); |
53569322 | 614 | if (ret < 0) |
bf956ec0 MD |
615 | goto end; |
616 | break; | |
617 | } | |
04aa13f8 | 618 | case BYTECODE_OP_NE: |
bf956ec0 | 619 | { |
3151a51d | 620 | ret = bin_op_compare_check(stack, opcode, "!="); |
53569322 | 621 | if (ret < 0) |
bf956ec0 MD |
622 | goto end; |
623 | break; | |
624 | } | |
04aa13f8 | 625 | case BYTECODE_OP_GT: |
bf956ec0 | 626 | { |
3151a51d | 627 | ret = bin_op_compare_check(stack, opcode, ">"); |
53569322 | 628 | if (ret < 0) |
bf956ec0 MD |
629 | goto end; |
630 | break; | |
631 | } | |
04aa13f8 | 632 | case BYTECODE_OP_LT: |
bf956ec0 | 633 | { |
3151a51d | 634 | ret = bin_op_compare_check(stack, opcode, "<"); |
53569322 | 635 | if (ret < 0) |
bf956ec0 MD |
636 | goto end; |
637 | break; | |
638 | } | |
04aa13f8 | 639 | case BYTECODE_OP_GE: |
bf956ec0 | 640 | { |
3151a51d | 641 | ret = bin_op_compare_check(stack, opcode, ">="); |
53569322 | 642 | if (ret < 0) |
bf956ec0 MD |
643 | goto end; |
644 | break; | |
645 | } | |
04aa13f8 | 646 | case BYTECODE_OP_LE: |
bf956ec0 | 647 | { |
3151a51d | 648 | ret = bin_op_compare_check(stack, opcode, "<="); |
53569322 | 649 | if (ret < 0) |
97b58163 | 650 | goto end; |
bf956ec0 MD |
651 | break; |
652 | } | |
97b58163 | 653 | |
04aa13f8 FD |
654 | case BYTECODE_OP_EQ_STRING: |
655 | case BYTECODE_OP_NE_STRING: | |
656 | case BYTECODE_OP_GT_STRING: | |
657 | case BYTECODE_OP_LT_STRING: | |
658 | case BYTECODE_OP_GE_STRING: | |
659 | case BYTECODE_OP_LE_STRING: | |
bf956ec0 | 660 | { |
0305960f MD |
661 | if (!vstack_ax(stack) || !vstack_bx(stack)) { |
662 | ERR("Empty stack\n"); | |
663 | ret = -EINVAL; | |
664 | goto end; | |
665 | } | |
666 | if (vstack_ax(stack)->type != REG_STRING | |
667 | || vstack_bx(stack)->type != REG_STRING) { | |
bf956ec0 | 668 | ERR("Unexpected register type for string comparator\n"); |
97b58163 MD |
669 | ret = -EINVAL; |
670 | goto end; | |
97b58163 | 671 | } |
bf956ec0 MD |
672 | break; |
673 | } | |
97b58163 | 674 | |
04aa13f8 FD |
675 | case BYTECODE_OP_EQ_STAR_GLOB_STRING: |
676 | case BYTECODE_OP_NE_STAR_GLOB_STRING: | |
3151a51d PP |
677 | { |
678 | if (!vstack_ax(stack) || !vstack_bx(stack)) { | |
679 | ERR("Empty stack\n"); | |
680 | ret = -EINVAL; | |
681 | goto end; | |
682 | } | |
683 | if (vstack_ax(stack)->type != REG_STAR_GLOB_STRING | |
684 | && vstack_bx(stack)->type != REG_STAR_GLOB_STRING) { | |
685 | ERR("Unexpected register type for globbing pattern comparator\n"); | |
686 | ret = -EINVAL; | |
687 | goto end; | |
688 | } | |
689 | break; | |
690 | } | |
691 | ||
04aa13f8 FD |
692 | case BYTECODE_OP_EQ_S64: |
693 | case BYTECODE_OP_NE_S64: | |
694 | case BYTECODE_OP_GT_S64: | |
695 | case BYTECODE_OP_LT_S64: | |
696 | case BYTECODE_OP_GE_S64: | |
697 | case BYTECODE_OP_LE_S64: | |
bf956ec0 | 698 | { |
0305960f MD |
699 | if (!vstack_ax(stack) || !vstack_bx(stack)) { |
700 | ERR("Empty stack\n"); | |
701 | ret = -EINVAL; | |
702 | goto end; | |
703 | } | |
d97f9b78 MD |
704 | switch (vstack_ax(stack)->type) { |
705 | case REG_S64: | |
706 | case REG_U64: | |
707 | break; | |
708 | default: | |
709 | ERR("Unexpected register type for s64 comparator\n"); | |
710 | ret = -EINVAL; | |
711 | goto end; | |
712 | } | |
713 | switch (vstack_bx(stack)->type) { | |
714 | case REG_S64: | |
715 | case REG_U64: | |
716 | break; | |
717 | default: | |
bf956ec0 MD |
718 | ERR("Unexpected register type for s64 comparator\n"); |
719 | ret = -EINVAL; | |
720 | goto end; | |
97b58163 | 721 | } |
bf956ec0 MD |
722 | break; |
723 | } | |
97b58163 | 724 | |
04aa13f8 FD |
725 | case BYTECODE_OP_EQ_DOUBLE: |
726 | case BYTECODE_OP_NE_DOUBLE: | |
727 | case BYTECODE_OP_GT_DOUBLE: | |
728 | case BYTECODE_OP_LT_DOUBLE: | |
729 | case BYTECODE_OP_GE_DOUBLE: | |
730 | case BYTECODE_OP_LE_DOUBLE: | |
bf956ec0 | 731 | { |
0305960f MD |
732 | if (!vstack_ax(stack) || !vstack_bx(stack)) { |
733 | ERR("Empty stack\n"); | |
734 | ret = -EINVAL; | |
735 | goto end; | |
736 | } | |
dbea82ec MD |
737 | if (vstack_ax(stack)->type != REG_DOUBLE && vstack_bx(stack)->type != REG_DOUBLE) { |
738 | ERR("Double operator should have two double registers\n"); | |
bf956ec0 MD |
739 | ret = -EINVAL; |
740 | goto end; | |
97b58163 | 741 | } |
dbea82ec MD |
742 | break; |
743 | } | |
744 | ||
04aa13f8 FD |
745 | case BYTECODE_OP_EQ_DOUBLE_S64: |
746 | case BYTECODE_OP_NE_DOUBLE_S64: | |
747 | case BYTECODE_OP_GT_DOUBLE_S64: | |
748 | case BYTECODE_OP_LT_DOUBLE_S64: | |
749 | case BYTECODE_OP_GE_DOUBLE_S64: | |
750 | case BYTECODE_OP_LE_DOUBLE_S64: | |
dbea82ec MD |
751 | { |
752 | if (!vstack_ax(stack) || !vstack_bx(stack)) { | |
753 | ERR("Empty stack\n"); | |
754 | ret = -EINVAL; | |
755 | goto end; | |
756 | } | |
d97f9b78 MD |
757 | switch (vstack_ax(stack)->type) { |
758 | case REG_S64: | |
759 | case REG_U64: | |
760 | break; | |
761 | default: | |
762 | ERR("Double-S64 operator has unexpected register types\n"); | |
763 | ret = -EINVAL; | |
764 | goto end; | |
765 | } | |
766 | switch (vstack_bx(stack)->type) { | |
767 | case REG_DOUBLE: | |
768 | break; | |
769 | default: | |
dbea82ec MD |
770 | ERR("Double-S64 operator has unexpected register types\n"); |
771 | ret = -EINVAL; | |
772 | goto end; | |
773 | } | |
774 | break; | |
775 | } | |
776 | ||
04aa13f8 FD |
777 | case BYTECODE_OP_EQ_S64_DOUBLE: |
778 | case BYTECODE_OP_NE_S64_DOUBLE: | |
779 | case BYTECODE_OP_GT_S64_DOUBLE: | |
780 | case BYTECODE_OP_LT_S64_DOUBLE: | |
781 | case BYTECODE_OP_GE_S64_DOUBLE: | |
782 | case BYTECODE_OP_LE_S64_DOUBLE: | |
dbea82ec MD |
783 | { |
784 | if (!vstack_ax(stack) || !vstack_bx(stack)) { | |
785 | ERR("Empty stack\n"); | |
786 | ret = -EINVAL; | |
787 | goto end; | |
788 | } | |
d97f9b78 MD |
789 | switch (vstack_ax(stack)->type) { |
790 | case REG_DOUBLE: | |
791 | break; | |
792 | default: | |
793 | ERR("S64-Double operator has unexpected register types\n"); | |
794 | ret = -EINVAL; | |
795 | goto end; | |
796 | } | |
797 | switch (vstack_bx(stack)->type) { | |
798 | case REG_S64: | |
799 | case REG_U64: | |
800 | break; | |
801 | default: | |
dbea82ec | 802 | ERR("S64-Double operator has unexpected register types\n"); |
bf956ec0 MD |
803 | ret = -EINVAL; |
804 | goto end; | |
97b58163 | 805 | } |
bf956ec0 MD |
806 | break; |
807 | } | |
97b58163 | 808 | |
04aa13f8 | 809 | case BYTECODE_OP_BIT_RSHIFT: |
0039e2d8 MD |
810 | ret = bin_op_bitwise_check(stack, opcode, ">>"); |
811 | if (ret < 0) | |
812 | goto end; | |
813 | break; | |
04aa13f8 | 814 | case BYTECODE_OP_BIT_LSHIFT: |
0039e2d8 MD |
815 | ret = bin_op_bitwise_check(stack, opcode, "<<"); |
816 | if (ret < 0) | |
817 | goto end; | |
818 | break; | |
04aa13f8 | 819 | case BYTECODE_OP_BIT_AND: |
47e5f13e MD |
820 | ret = bin_op_bitwise_check(stack, opcode, "&"); |
821 | if (ret < 0) | |
822 | goto end; | |
823 | break; | |
04aa13f8 | 824 | case BYTECODE_OP_BIT_OR: |
47e5f13e MD |
825 | ret = bin_op_bitwise_check(stack, opcode, "|"); |
826 | if (ret < 0) | |
827 | goto end; | |
828 | break; | |
04aa13f8 | 829 | case BYTECODE_OP_BIT_XOR: |
47e5f13e MD |
830 | ret = bin_op_bitwise_check(stack, opcode, "^"); |
831 | if (ret < 0) | |
832 | goto end; | |
833 | break; | |
834 | ||
bf956ec0 | 835 | /* unary */ |
04aa13f8 FD |
836 | case BYTECODE_OP_UNARY_PLUS: |
837 | case BYTECODE_OP_UNARY_MINUS: | |
838 | case BYTECODE_OP_UNARY_NOT: | |
bf956ec0 | 839 | { |
0305960f MD |
840 | if (!vstack_ax(stack)) { |
841 | ERR("Empty stack\n"); | |
bf956ec0 MD |
842 | ret = -EINVAL; |
843 | goto end; | |
844 | } | |
0305960f | 845 | switch (vstack_ax(stack)->type) { |
bf956ec0 MD |
846 | default: |
847 | ERR("unknown register type\n"); | |
848 | ret = -EINVAL; | |
849 | goto end; | |
97b58163 | 850 | |
bf956ec0 | 851 | case REG_STRING: |
3151a51d | 852 | case REG_STAR_GLOB_STRING: |
bf956ec0 MD |
853 | ERR("Unary op can only be applied to numeric or floating point registers\n"); |
854 | ret = -EINVAL; | |
855 | goto end; | |
856 | case REG_S64: | |
857 | break; | |
d97f9b78 MD |
858 | case REG_U64: |
859 | break; | |
bf956ec0 | 860 | case REG_DOUBLE: |
97b58163 | 861 | break; |
53569322 MD |
862 | case REG_UNKNOWN: |
863 | break; | |
97b58163 | 864 | } |
bf956ec0 MD |
865 | break; |
866 | } | |
04aa13f8 | 867 | case BYTECODE_OP_UNARY_BIT_NOT: |
0039e2d8 MD |
868 | { |
869 | if (!vstack_ax(stack)) { | |
870 | ERR("Empty stack\n"); | |
871 | ret = -EINVAL; | |
872 | goto end; | |
873 | } | |
874 | switch (vstack_ax(stack)->type) { | |
875 | default: | |
876 | ERR("unknown register type\n"); | |
877 | ret = -EINVAL; | |
878 | goto end; | |
879 | ||
880 | case REG_STRING: | |
881 | case REG_STAR_GLOB_STRING: | |
882 | case REG_DOUBLE: | |
883 | ERR("Unary bitwise op can only be applied to numeric registers\n"); | |
884 | ret = -EINVAL; | |
885 | goto end; | |
886 | case REG_S64: | |
887 | break; | |
d97f9b78 MD |
888 | case REG_U64: |
889 | break; | |
0039e2d8 MD |
890 | case REG_UNKNOWN: |
891 | break; | |
892 | } | |
893 | break; | |
894 | } | |
97b58163 | 895 | |
04aa13f8 FD |
896 | case BYTECODE_OP_UNARY_PLUS_S64: |
897 | case BYTECODE_OP_UNARY_MINUS_S64: | |
898 | case BYTECODE_OP_UNARY_NOT_S64: | |
bf956ec0 | 899 | { |
0305960f MD |
900 | if (!vstack_ax(stack)) { |
901 | ERR("Empty stack\n"); | |
bf956ec0 MD |
902 | ret = -EINVAL; |
903 | goto end; | |
904 | } | |
d97f9b78 MD |
905 | if (vstack_ax(stack)->type != REG_S64 && |
906 | vstack_ax(stack)->type != REG_U64) { | |
bf956ec0 MD |
907 | ERR("Invalid register type\n"); |
908 | ret = -EINVAL; | |
909 | goto end; | |
97b58163 | 910 | } |
bf956ec0 MD |
911 | break; |
912 | } | |
97b58163 | 913 | |
04aa13f8 FD |
914 | case BYTECODE_OP_UNARY_PLUS_DOUBLE: |
915 | case BYTECODE_OP_UNARY_MINUS_DOUBLE: | |
916 | case BYTECODE_OP_UNARY_NOT_DOUBLE: | |
bf956ec0 | 917 | { |
0305960f MD |
918 | if (!vstack_ax(stack)) { |
919 | ERR("Empty stack\n"); | |
bf956ec0 MD |
920 | ret = -EINVAL; |
921 | goto end; | |
97b58163 | 922 | } |
0305960f | 923 | if (vstack_ax(stack)->type != REG_DOUBLE) { |
bf956ec0 MD |
924 | ERR("Invalid register type\n"); |
925 | ret = -EINVAL; | |
926 | goto end; | |
927 | } | |
928 | break; | |
929 | } | |
97b58163 | 930 | |
bf956ec0 | 931 | /* logical */ |
04aa13f8 FD |
932 | case BYTECODE_OP_AND: |
933 | case BYTECODE_OP_OR: | |
bf956ec0 MD |
934 | { |
935 | struct logical_op *insn = (struct logical_op *) pc; | |
97b58163 | 936 | |
0305960f MD |
937 | if (!vstack_ax(stack)) { |
938 | ERR("Empty stack\n"); | |
939 | ret = -EINVAL; | |
940 | goto end; | |
941 | } | |
53569322 | 942 | if (vstack_ax(stack)->type != REG_S64 |
d97f9b78 | 943 | && vstack_ax(stack)->type != REG_U64 |
53569322 | 944 | && vstack_ax(stack)->type != REG_UNKNOWN) { |
d97f9b78 | 945 | ERR("Logical comparator expects S64, U64 or dynamic register\n"); |
bf956ec0 MD |
946 | ret = -EINVAL; |
947 | goto end; | |
97b58163 MD |
948 | } |
949 | ||
bf956ec0 MD |
950 | dbg_printf("Validate jumping to bytecode offset %u\n", |
951 | (unsigned int) insn->skip_offset); | |
952 | if (unlikely(start_pc + insn->skip_offset <= pc)) { | |
953 | ERR("Loops are not allowed in bytecode\n"); | |
97b58163 MD |
954 | ret = -EINVAL; |
955 | goto end; | |
956 | } | |
bf956ec0 MD |
957 | break; |
958 | } | |
97b58163 | 959 | |
77aa5901 | 960 | /* load field ref */ |
04aa13f8 | 961 | case BYTECODE_OP_LOAD_FIELD_REF: |
bf956ec0 MD |
962 | { |
963 | ERR("Unknown field ref type\n"); | |
964 | ret = -EINVAL; | |
965 | goto end; | |
966 | } | |
04aa13f8 FD |
967 | case BYTECODE_OP_LOAD_FIELD_REF_STRING: |
968 | case BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE: | |
bf956ec0 MD |
969 | { |
970 | struct load_op *insn = (struct load_op *) pc; | |
971 | struct field_ref *ref = (struct field_ref *) insn->data; | |
972 | ||
bf956ec0 MD |
973 | dbg_printf("Validate load field ref offset %u type string\n", |
974 | ref->offset); | |
975 | break; | |
976 | } | |
04aa13f8 | 977 | case BYTECODE_OP_LOAD_FIELD_REF_S64: |
bf956ec0 MD |
978 | { |
979 | struct load_op *insn = (struct load_op *) pc; | |
980 | struct field_ref *ref = (struct field_ref *) insn->data; | |
97b58163 | 981 | |
bf956ec0 MD |
982 | dbg_printf("Validate load field ref offset %u type s64\n", |
983 | ref->offset); | |
984 | break; | |
985 | } | |
04aa13f8 | 986 | case BYTECODE_OP_LOAD_FIELD_REF_DOUBLE: |
bf956ec0 MD |
987 | { |
988 | struct load_op *insn = (struct load_op *) pc; | |
989 | struct field_ref *ref = (struct field_ref *) insn->data; | |
97b58163 | 990 | |
bf956ec0 MD |
991 | dbg_printf("Validate load field ref offset %u type double\n", |
992 | ref->offset); | |
993 | break; | |
994 | } | |
97b58163 | 995 | |
77aa5901 | 996 | /* load from immediate operand */ |
04aa13f8 FD |
997 | case BYTECODE_OP_LOAD_STRING: |
998 | case BYTECODE_OP_LOAD_STAR_GLOB_STRING: | |
bf956ec0 | 999 | { |
bf956ec0 MD |
1000 | break; |
1001 | } | |
97b58163 | 1002 | |
04aa13f8 | 1003 | case BYTECODE_OP_LOAD_S64: |
bf956ec0 | 1004 | { |
bf956ec0 MD |
1005 | break; |
1006 | } | |
97b58163 | 1007 | |
04aa13f8 | 1008 | case BYTECODE_OP_LOAD_DOUBLE: |
bf956ec0 | 1009 | { |
bf956ec0 MD |
1010 | break; |
1011 | } | |
97b58163 | 1012 | |
04aa13f8 FD |
1013 | case BYTECODE_OP_CAST_TO_S64: |
1014 | case BYTECODE_OP_CAST_DOUBLE_TO_S64: | |
bf956ec0 MD |
1015 | { |
1016 | struct cast_op *insn = (struct cast_op *) pc; | |
97b58163 | 1017 | |
0305960f MD |
1018 | if (!vstack_ax(stack)) { |
1019 | ERR("Empty stack\n"); | |
bf956ec0 MD |
1020 | ret = -EINVAL; |
1021 | goto end; | |
1022 | } | |
0305960f | 1023 | switch (vstack_ax(stack)->type) { |
bf956ec0 MD |
1024 | default: |
1025 | ERR("unknown register type\n"); | |
1026 | ret = -EINVAL; | |
1027 | goto end; | |
97b58163 | 1028 | |
bf956ec0 | 1029 | case REG_STRING: |
3151a51d | 1030 | case REG_STAR_GLOB_STRING: |
bf956ec0 MD |
1031 | ERR("Cast op can only be applied to numeric or floating point registers\n"); |
1032 | ret = -EINVAL; | |
1033 | goto end; | |
1034 | case REG_S64: | |
1035 | break; | |
d97f9b78 MD |
1036 | case REG_U64: |
1037 | break; | |
bf956ec0 MD |
1038 | case REG_DOUBLE: |
1039 | break; | |
53569322 MD |
1040 | case REG_UNKNOWN: |
1041 | break; | |
bf956ec0 | 1042 | } |
04aa13f8 | 1043 | if (insn->op == BYTECODE_OP_CAST_DOUBLE_TO_S64) { |
0305960f | 1044 | if (vstack_ax(stack)->type != REG_DOUBLE) { |
bf956ec0 | 1045 | ERR("Cast expects double\n"); |
97b58163 MD |
1046 | ret = -EINVAL; |
1047 | goto end; | |
97b58163 | 1048 | } |
97b58163 | 1049 | } |
bf956ec0 MD |
1050 | break; |
1051 | } | |
04aa13f8 | 1052 | case BYTECODE_OP_CAST_NOP: |
bf956ec0 MD |
1053 | { |
1054 | break; | |
1055 | } | |
1056 | ||
77aa5901 | 1057 | /* get context ref */ |
04aa13f8 | 1058 | case BYTECODE_OP_GET_CONTEXT_REF: |
77aa5901 | 1059 | { |
53569322 MD |
1060 | struct load_op *insn = (struct load_op *) pc; |
1061 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1062 | ||
1063 | dbg_printf("Validate get context ref offset %u type dynamic\n", | |
1064 | ref->offset); | |
1065 | break; | |
77aa5901 | 1066 | } |
04aa13f8 | 1067 | case BYTECODE_OP_GET_CONTEXT_REF_STRING: |
77aa5901 MD |
1068 | { |
1069 | struct load_op *insn = (struct load_op *) pc; | |
1070 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1071 | ||
1072 | dbg_printf("Validate get context ref offset %u type string\n", | |
1073 | ref->offset); | |
1074 | break; | |
1075 | } | |
04aa13f8 | 1076 | case BYTECODE_OP_GET_CONTEXT_REF_S64: |
77aa5901 MD |
1077 | { |
1078 | struct load_op *insn = (struct load_op *) pc; | |
1079 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1080 | ||
1081 | dbg_printf("Validate get context ref offset %u type s64\n", | |
1082 | ref->offset); | |
1083 | break; | |
1084 | } | |
04aa13f8 | 1085 | case BYTECODE_OP_GET_CONTEXT_REF_DOUBLE: |
77aa5901 MD |
1086 | { |
1087 | struct load_op *insn = (struct load_op *) pc; | |
1088 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1089 | ||
1090 | dbg_printf("Validate get context ref offset %u type double\n", | |
1091 | ref->offset); | |
1092 | break; | |
1093 | } | |
1094 | ||
47e5f13e MD |
1095 | /* |
1096 | * Instructions for recursive traversal through composed types. | |
1097 | */ | |
04aa13f8 | 1098 | case BYTECODE_OP_GET_CONTEXT_ROOT: |
47e5f13e MD |
1099 | { |
1100 | dbg_printf("Validate get context root\n"); | |
1101 | break; | |
1102 | } | |
04aa13f8 | 1103 | case BYTECODE_OP_GET_APP_CONTEXT_ROOT: |
47e5f13e MD |
1104 | { |
1105 | dbg_printf("Validate get app context root\n"); | |
1106 | break; | |
1107 | } | |
04aa13f8 | 1108 | case BYTECODE_OP_GET_PAYLOAD_ROOT: |
47e5f13e MD |
1109 | { |
1110 | dbg_printf("Validate get payload root\n"); | |
1111 | break; | |
1112 | } | |
04aa13f8 | 1113 | case BYTECODE_OP_LOAD_FIELD: |
47e5f13e MD |
1114 | { |
1115 | /* | |
1116 | * We tolerate that field type is unknown at validation, | |
1117 | * because we are performing the load specialization in | |
1118 | * a phase after validation. | |
1119 | */ | |
1120 | dbg_printf("Validate load field\n"); | |
1121 | break; | |
1122 | } | |
04aa13f8 | 1123 | case BYTECODE_OP_LOAD_FIELD_S8: |
47e5f13e MD |
1124 | { |
1125 | dbg_printf("Validate load field s8\n"); | |
1126 | break; | |
1127 | } | |
04aa13f8 | 1128 | case BYTECODE_OP_LOAD_FIELD_S16: |
47e5f13e MD |
1129 | { |
1130 | dbg_printf("Validate load field s16\n"); | |
1131 | break; | |
1132 | } | |
04aa13f8 | 1133 | case BYTECODE_OP_LOAD_FIELD_S32: |
47e5f13e MD |
1134 | { |
1135 | dbg_printf("Validate load field s32\n"); | |
1136 | break; | |
1137 | } | |
04aa13f8 | 1138 | case BYTECODE_OP_LOAD_FIELD_S64: |
47e5f13e MD |
1139 | { |
1140 | dbg_printf("Validate load field s64\n"); | |
1141 | break; | |
1142 | } | |
04aa13f8 | 1143 | case BYTECODE_OP_LOAD_FIELD_U8: |
47e5f13e MD |
1144 | { |
1145 | dbg_printf("Validate load field u8\n"); | |
1146 | break; | |
1147 | } | |
04aa13f8 | 1148 | case BYTECODE_OP_LOAD_FIELD_U16: |
47e5f13e MD |
1149 | { |
1150 | dbg_printf("Validate load field u16\n"); | |
1151 | break; | |
1152 | } | |
04aa13f8 | 1153 | case BYTECODE_OP_LOAD_FIELD_U32: |
47e5f13e MD |
1154 | { |
1155 | dbg_printf("Validate load field u32\n"); | |
1156 | break; | |
1157 | } | |
04aa13f8 | 1158 | case BYTECODE_OP_LOAD_FIELD_U64: |
47e5f13e MD |
1159 | { |
1160 | dbg_printf("Validate load field u64\n"); | |
1161 | break; | |
1162 | } | |
04aa13f8 | 1163 | case BYTECODE_OP_LOAD_FIELD_STRING: |
47e5f13e MD |
1164 | { |
1165 | dbg_printf("Validate load field string\n"); | |
1166 | break; | |
1167 | } | |
04aa13f8 | 1168 | case BYTECODE_OP_LOAD_FIELD_SEQUENCE: |
47e5f13e MD |
1169 | { |
1170 | dbg_printf("Validate load field sequence\n"); | |
1171 | break; | |
1172 | } | |
04aa13f8 | 1173 | case BYTECODE_OP_LOAD_FIELD_DOUBLE: |
47e5f13e MD |
1174 | { |
1175 | dbg_printf("Validate load field double\n"); | |
1176 | break; | |
1177 | } | |
1178 | ||
04aa13f8 | 1179 | case BYTECODE_OP_GET_SYMBOL: |
47e5f13e MD |
1180 | { |
1181 | struct load_op *insn = (struct load_op *) pc; | |
1182 | struct get_symbol *sym = (struct get_symbol *) insn->data; | |
1183 | ||
1184 | dbg_printf("Validate get symbol offset %u\n", sym->offset); | |
1185 | break; | |
1186 | } | |
1187 | ||
04aa13f8 | 1188 | case BYTECODE_OP_GET_SYMBOL_FIELD: |
47e5f13e MD |
1189 | { |
1190 | struct load_op *insn = (struct load_op *) pc; | |
1191 | struct get_symbol *sym = (struct get_symbol *) insn->data; | |
1192 | ||
1193 | dbg_printf("Validate get symbol field offset %u\n", sym->offset); | |
1194 | break; | |
1195 | } | |
1196 | ||
04aa13f8 | 1197 | case BYTECODE_OP_GET_INDEX_U16: |
47e5f13e MD |
1198 | { |
1199 | struct load_op *insn = (struct load_op *) pc; | |
1200 | struct get_index_u16 *get_index = (struct get_index_u16 *) insn->data; | |
1201 | ||
1202 | dbg_printf("Validate get index u16 index %u\n", get_index->index); | |
1203 | break; | |
1204 | } | |
1205 | ||
04aa13f8 | 1206 | case BYTECODE_OP_GET_INDEX_U64: |
47e5f13e MD |
1207 | { |
1208 | struct load_op *insn = (struct load_op *) pc; | |
1209 | struct get_index_u64 *get_index = (struct get_index_u64 *) insn->data; | |
1210 | ||
1211 | dbg_printf("Validate get index u64 index %" PRIu64 "\n", get_index->index); | |
1212 | break; | |
1213 | } | |
bf956ec0 MD |
1214 | } |
1215 | end: | |
1216 | return ret; | |
1217 | } | |
1218 | ||
1219 | /* | |
1220 | * Return value: | |
1221 | * 0: success | |
1222 | * <0: error | |
1223 | */ | |
1224 | static | |
1225 | int validate_instruction_all_contexts(struct bytecode_runtime *bytecode, | |
1226 | struct cds_lfht *merge_points, | |
0305960f | 1227 | struct vstack *stack, |
22389ecb MD |
1228 | char *start_pc, |
1229 | char *pc) | |
bf956ec0 MD |
1230 | { |
1231 | int ret; | |
1232 | unsigned long target_pc = pc - start_pc; | |
1233 | struct cds_lfht_iter iter; | |
1234 | struct cds_lfht_node *node; | |
71c1ceeb | 1235 | struct lfht_mp_node *mp_node; |
bf956ec0 MD |
1236 | unsigned long hash; |
1237 | ||
1238 | /* Validate the context resulting from the previous instruction */ | |
0305960f | 1239 | ret = validate_instruction_context(bytecode, stack, start_pc, pc); |
53569322 | 1240 | if (ret < 0) |
bf956ec0 MD |
1241 | return ret; |
1242 | ||
1243 | /* Validate merge points */ | |
22389ecb | 1244 | hash = lttng_hash_mix((const char *) target_pc, sizeof(target_pc), |
bf956ec0 | 1245 | lttng_hash_seed); |
71c1ceeb | 1246 | cds_lfht_lookup(merge_points, hash, lttng_hash_match, |
22389ecb | 1247 | (const char *) target_pc, &iter); |
71c1ceeb MD |
1248 | node = cds_lfht_iter_get_node(&iter); |
1249 | if (node) { | |
1250 | mp_node = caa_container_of(node, struct lfht_mp_node, node); | |
3151a51d | 1251 | |
04aa13f8 | 1252 | dbg_printf("Bytecode: validate merge point at offset %lu\n", |
bf956ec0 | 1253 | target_pc); |
71c1ceeb MD |
1254 | if (merge_points_compare(stack, &mp_node->stack)) { |
1255 | ERR("Merge points differ for offset %lu\n", | |
1256 | target_pc); | |
1257 | return -EINVAL; | |
1258 | } | |
bf956ec0 | 1259 | /* Once validated, we can remove the merge point */ |
04aa13f8 | 1260 | dbg_printf("Bytecode: remove merge point at offset %lu\n", |
bf956ec0 MD |
1261 | target_pc); |
1262 | ret = cds_lfht_del(merge_points, node); | |
1263 | assert(!ret); | |
1264 | } | |
1265 | return 0; | |
1266 | } | |
1267 | ||
1268 | /* | |
1269 | * Return value: | |
1270 | * >0: going to next insn. | |
1271 | * 0: success, stop iteration. | |
1272 | * <0: error | |
1273 | */ | |
1274 | static | |
1275 | int exec_insn(struct bytecode_runtime *bytecode, | |
1276 | struct cds_lfht *merge_points, | |
0305960f | 1277 | struct vstack *stack, |
22389ecb MD |
1278 | char **_next_pc, |
1279 | char *pc) | |
bf956ec0 MD |
1280 | { |
1281 | int ret = 1; | |
22389ecb | 1282 | char *next_pc = *_next_pc; |
bf956ec0 | 1283 | |
04aa13f8 FD |
1284 | switch (*(bytecode_opcode_t *) pc) { |
1285 | case BYTECODE_OP_UNKNOWN: | |
bf956ec0 MD |
1286 | default: |
1287 | { | |
1288 | ERR("unknown bytecode op %u\n", | |
04aa13f8 | 1289 | (unsigned int) *(bytecode_opcode_t *) pc); |
bf956ec0 MD |
1290 | ret = -EINVAL; |
1291 | goto end; | |
1292 | } | |
1293 | ||
04aa13f8 | 1294 | case BYTECODE_OP_RETURN: |
bf956ec0 | 1295 | { |
71c1ceeb MD |
1296 | if (!vstack_ax(stack)) { |
1297 | ERR("Empty stack\n"); | |
1298 | ret = -EINVAL; | |
1299 | goto end; | |
1300 | } | |
47e5f13e MD |
1301 | switch (vstack_ax(stack)->type) { |
1302 | case REG_S64: | |
d97f9b78 | 1303 | case REG_U64: |
09f78acb FD |
1304 | case REG_DOUBLE: |
1305 | case REG_STRING: | |
1306 | case REG_PTR: | |
47e5f13e MD |
1307 | case REG_UNKNOWN: |
1308 | break; | |
1309 | default: | |
1310 | ERR("Unexpected register type %d at end of bytecode\n", | |
1311 | (int) vstack_ax(stack)->type); | |
1312 | ret = -EINVAL; | |
1313 | goto end; | |
1314 | } | |
1315 | ||
bf956ec0 MD |
1316 | ret = 0; |
1317 | goto end; | |
1318 | } | |
04aa13f8 | 1319 | case BYTECODE_OP_RETURN_S64: |
93c591bb MD |
1320 | { |
1321 | if (!vstack_ax(stack)) { | |
1322 | ERR("Empty stack\n"); | |
1323 | ret = -EINVAL; | |
1324 | goto end; | |
1325 | } | |
1326 | switch (vstack_ax(stack)->type) { | |
1327 | case REG_S64: | |
d97f9b78 | 1328 | case REG_U64: |
93c591bb MD |
1329 | break; |
1330 | default: | |
1331 | case REG_UNKNOWN: | |
1332 | ERR("Unexpected register type %d at end of bytecode\n", | |
1333 | (int) vstack_ax(stack)->type); | |
1334 | ret = -EINVAL; | |
1335 | goto end; | |
1336 | } | |
1337 | ||
1338 | ret = 0; | |
1339 | goto end; | |
1340 | } | |
bf956ec0 MD |
1341 | |
1342 | /* binary */ | |
04aa13f8 FD |
1343 | case BYTECODE_OP_MUL: |
1344 | case BYTECODE_OP_DIV: | |
1345 | case BYTECODE_OP_MOD: | |
1346 | case BYTECODE_OP_PLUS: | |
1347 | case BYTECODE_OP_MINUS: | |
bf956ec0 MD |
1348 | { |
1349 | ERR("unsupported bytecode op %u\n", | |
04aa13f8 | 1350 | (unsigned int) *(bytecode_opcode_t *) pc); |
bf956ec0 MD |
1351 | ret = -EINVAL; |
1352 | goto end; | |
1353 | } | |
1354 | ||
04aa13f8 FD |
1355 | case BYTECODE_OP_EQ: |
1356 | case BYTECODE_OP_NE: | |
1357 | case BYTECODE_OP_GT: | |
1358 | case BYTECODE_OP_LT: | |
1359 | case BYTECODE_OP_GE: | |
1360 | case BYTECODE_OP_LE: | |
1361 | case BYTECODE_OP_EQ_STRING: | |
1362 | case BYTECODE_OP_NE_STRING: | |
1363 | case BYTECODE_OP_GT_STRING: | |
1364 | case BYTECODE_OP_LT_STRING: | |
1365 | case BYTECODE_OP_GE_STRING: | |
1366 | case BYTECODE_OP_LE_STRING: | |
1367 | case BYTECODE_OP_EQ_STAR_GLOB_STRING: | |
1368 | case BYTECODE_OP_NE_STAR_GLOB_STRING: | |
1369 | case BYTECODE_OP_EQ_S64: | |
1370 | case BYTECODE_OP_NE_S64: | |
1371 | case BYTECODE_OP_GT_S64: | |
1372 | case BYTECODE_OP_LT_S64: | |
1373 | case BYTECODE_OP_GE_S64: | |
1374 | case BYTECODE_OP_LE_S64: | |
1375 | case BYTECODE_OP_EQ_DOUBLE: | |
1376 | case BYTECODE_OP_NE_DOUBLE: | |
1377 | case BYTECODE_OP_GT_DOUBLE: | |
1378 | case BYTECODE_OP_LT_DOUBLE: | |
1379 | case BYTECODE_OP_GE_DOUBLE: | |
1380 | case BYTECODE_OP_LE_DOUBLE: | |
1381 | case BYTECODE_OP_EQ_DOUBLE_S64: | |
1382 | case BYTECODE_OP_NE_DOUBLE_S64: | |
1383 | case BYTECODE_OP_GT_DOUBLE_S64: | |
1384 | case BYTECODE_OP_LT_DOUBLE_S64: | |
1385 | case BYTECODE_OP_GE_DOUBLE_S64: | |
1386 | case BYTECODE_OP_LE_DOUBLE_S64: | |
1387 | case BYTECODE_OP_EQ_S64_DOUBLE: | |
1388 | case BYTECODE_OP_NE_S64_DOUBLE: | |
1389 | case BYTECODE_OP_GT_S64_DOUBLE: | |
1390 | case BYTECODE_OP_LT_S64_DOUBLE: | |
1391 | case BYTECODE_OP_GE_S64_DOUBLE: | |
1392 | case BYTECODE_OP_LE_S64_DOUBLE: | |
d97f9b78 MD |
1393 | { |
1394 | /* Pop 2, push 1 */ | |
1395 | if (vstack_pop(stack)) { | |
1396 | ret = -EINVAL; | |
1397 | goto end; | |
1398 | } | |
1399 | if (!vstack_ax(stack)) { | |
1400 | ERR("Empty stack\n"); | |
1401 | ret = -EINVAL; | |
1402 | goto end; | |
1403 | } | |
1404 | switch (vstack_ax(stack)->type) { | |
1405 | case REG_S64: | |
1406 | case REG_U64: | |
1407 | case REG_DOUBLE: | |
1408 | case REG_STRING: | |
1409 | case REG_STAR_GLOB_STRING: | |
1410 | case REG_UNKNOWN: | |
1411 | break; | |
1412 | default: | |
1413 | ERR("Unexpected register type %d for operation\n", | |
1414 | (int) vstack_ax(stack)->type); | |
1415 | ret = -EINVAL; | |
1416 | goto end; | |
1417 | } | |
1418 | ||
1419 | vstack_ax(stack)->type = REG_S64; | |
1420 | next_pc += sizeof(struct binary_op); | |
1421 | break; | |
1422 | } | |
1423 | ||
04aa13f8 FD |
1424 | case BYTECODE_OP_BIT_RSHIFT: |
1425 | case BYTECODE_OP_BIT_LSHIFT: | |
1426 | case BYTECODE_OP_BIT_AND: | |
1427 | case BYTECODE_OP_BIT_OR: | |
1428 | case BYTECODE_OP_BIT_XOR: | |
bf956ec0 | 1429 | { |
0305960f MD |
1430 | /* Pop 2, push 1 */ |
1431 | if (vstack_pop(stack)) { | |
1432 | ret = -EINVAL; | |
1433 | goto end; | |
1434 | } | |
1435 | if (!vstack_ax(stack)) { | |
1436 | ERR("Empty stack\n"); | |
1437 | ret = -EINVAL; | |
1438 | goto end; | |
1439 | } | |
47e5f13e MD |
1440 | switch (vstack_ax(stack)->type) { |
1441 | case REG_S64: | |
d97f9b78 | 1442 | case REG_U64: |
47e5f13e MD |
1443 | case REG_DOUBLE: |
1444 | case REG_STRING: | |
1445 | case REG_STAR_GLOB_STRING: | |
1446 | case REG_UNKNOWN: | |
1447 | break; | |
1448 | default: | |
1449 | ERR("Unexpected register type %d for operation\n", | |
1450 | (int) vstack_ax(stack)->type); | |
1451 | ret = -EINVAL; | |
1452 | goto end; | |
1453 | } | |
1454 | ||
d97f9b78 | 1455 | vstack_ax(stack)->type = REG_U64; |
bf956ec0 MD |
1456 | next_pc += sizeof(struct binary_op); |
1457 | break; | |
1458 | } | |
1459 | ||
1460 | /* unary */ | |
04aa13f8 FD |
1461 | case BYTECODE_OP_UNARY_PLUS: |
1462 | case BYTECODE_OP_UNARY_MINUS: | |
53569322 MD |
1463 | { |
1464 | /* Pop 1, push 1 */ | |
1465 | if (!vstack_ax(stack)) { | |
1466 | ERR("Empty stack\n"); | |
1467 | ret = -EINVAL; | |
1468 | goto end; | |
1469 | } | |
47e5f13e MD |
1470 | switch (vstack_ax(stack)->type) { |
1471 | case REG_UNKNOWN: | |
1472 | case REG_DOUBLE: | |
1473 | case REG_S64: | |
d97f9b78 | 1474 | case REG_U64: |
47e5f13e MD |
1475 | break; |
1476 | default: | |
1477 | ERR("Unexpected register type %d for operation\n", | |
1478 | (int) vstack_ax(stack)->type); | |
1479 | ret = -EINVAL; | |
1480 | goto end; | |
1481 | } | |
53569322 MD |
1482 | vstack_ax(stack)->type = REG_UNKNOWN; |
1483 | next_pc += sizeof(struct unary_op); | |
1484 | break; | |
1485 | } | |
1486 | ||
04aa13f8 FD |
1487 | case BYTECODE_OP_UNARY_PLUS_S64: |
1488 | case BYTECODE_OP_UNARY_MINUS_S64: | |
1489 | case BYTECODE_OP_UNARY_NOT_S64: | |
47e5f13e MD |
1490 | { |
1491 | /* Pop 1, push 1 */ | |
1492 | if (!vstack_ax(stack)) { | |
1493 | ERR("Empty stack\n"); | |
1494 | ret = -EINVAL; | |
1495 | goto end; | |
1496 | } | |
1497 | switch (vstack_ax(stack)->type) { | |
1498 | case REG_S64: | |
d97f9b78 | 1499 | case REG_U64: |
47e5f13e MD |
1500 | break; |
1501 | default: | |
1502 | ERR("Unexpected register type %d for operation\n", | |
1503 | (int) vstack_ax(stack)->type); | |
1504 | ret = -EINVAL; | |
1505 | goto end; | |
1506 | } | |
1507 | ||
47e5f13e MD |
1508 | next_pc += sizeof(struct unary_op); |
1509 | break; | |
1510 | } | |
1511 | ||
04aa13f8 | 1512 | case BYTECODE_OP_UNARY_NOT: |
47e5f13e MD |
1513 | { |
1514 | /* Pop 1, push 1 */ | |
1515 | if (!vstack_ax(stack)) { | |
1516 | ERR("Empty stack\n"); | |
1517 | ret = -EINVAL; | |
1518 | goto end; | |
1519 | } | |
1520 | switch (vstack_ax(stack)->type) { | |
1521 | case REG_UNKNOWN: | |
1522 | case REG_DOUBLE: | |
1523 | case REG_S64: | |
d97f9b78 | 1524 | case REG_U64: |
47e5f13e MD |
1525 | break; |
1526 | default: | |
1527 | ERR("Unexpected register type %d for operation\n", | |
1528 | (int) vstack_ax(stack)->type); | |
1529 | ret = -EINVAL; | |
1530 | goto end; | |
1531 | } | |
1532 | ||
47e5f13e MD |
1533 | next_pc += sizeof(struct unary_op); |
1534 | break; | |
1535 | } | |
1536 | ||
04aa13f8 | 1537 | case BYTECODE_OP_UNARY_BIT_NOT: |
0039e2d8 MD |
1538 | { |
1539 | /* Pop 1, push 1 */ | |
1540 | if (!vstack_ax(stack)) { | |
1541 | ERR("Empty stack\n"); | |
1542 | ret = -EINVAL; | |
1543 | goto end; | |
1544 | } | |
1545 | switch (vstack_ax(stack)->type) { | |
1546 | case REG_UNKNOWN: | |
1547 | case REG_S64: | |
d97f9b78 | 1548 | case REG_U64: |
0039e2d8 MD |
1549 | break; |
1550 | case REG_DOUBLE: | |
1551 | default: | |
1552 | ERR("Unexpected register type %d for operation\n", | |
1553 | (int) vstack_ax(stack)->type); | |
1554 | ret = -EINVAL; | |
1555 | goto end; | |
1556 | } | |
1557 | ||
d97f9b78 | 1558 | vstack_ax(stack)->type = REG_U64; |
0039e2d8 MD |
1559 | next_pc += sizeof(struct unary_op); |
1560 | break; | |
1561 | } | |
1562 | ||
04aa13f8 | 1563 | case BYTECODE_OP_UNARY_NOT_DOUBLE: |
bf956ec0 | 1564 | { |
0305960f MD |
1565 | /* Pop 1, push 1 */ |
1566 | if (!vstack_ax(stack)) { | |
1567 | ERR("Empty stack\n"); | |
1568 | ret = -EINVAL; | |
1569 | goto end; | |
1570 | } | |
47e5f13e MD |
1571 | switch (vstack_ax(stack)->type) { |
1572 | case REG_DOUBLE: | |
1573 | break; | |
1574 | default: | |
1575 | ERR("Incorrect register type %d for operation\n", | |
1576 | (int) vstack_ax(stack)->type); | |
1577 | ret = -EINVAL; | |
1578 | goto end; | |
1579 | } | |
1580 | ||
0305960f | 1581 | vstack_ax(stack)->type = REG_S64; |
bf956ec0 MD |
1582 | next_pc += sizeof(struct unary_op); |
1583 | break; | |
1584 | } | |
1585 | ||
04aa13f8 FD |
1586 | case BYTECODE_OP_UNARY_PLUS_DOUBLE: |
1587 | case BYTECODE_OP_UNARY_MINUS_DOUBLE: | |
bf956ec0 | 1588 | { |
0305960f MD |
1589 | /* Pop 1, push 1 */ |
1590 | if (!vstack_ax(stack)) { | |
1591 | ERR("Empty stack\n"); | |
1592 | ret = -EINVAL; | |
1593 | goto end; | |
1594 | } | |
47e5f13e MD |
1595 | switch (vstack_ax(stack)->type) { |
1596 | case REG_DOUBLE: | |
1597 | break; | |
1598 | default: | |
1599 | ERR("Incorrect register type %d for operation\n", | |
1600 | (int) vstack_ax(stack)->type); | |
1601 | ret = -EINVAL; | |
1602 | goto end; | |
1603 | } | |
1604 | ||
0305960f | 1605 | vstack_ax(stack)->type = REG_DOUBLE; |
bf956ec0 MD |
1606 | next_pc += sizeof(struct unary_op); |
1607 | break; | |
1608 | } | |
1609 | ||
1610 | /* logical */ | |
04aa13f8 FD |
1611 | case BYTECODE_OP_AND: |
1612 | case BYTECODE_OP_OR: | |
bf956ec0 MD |
1613 | { |
1614 | struct logical_op *insn = (struct logical_op *) pc; | |
1615 | int merge_ret; | |
1616 | ||
1617 | /* Add merge point to table */ | |
71c1ceeb MD |
1618 | merge_ret = merge_point_add_check(merge_points, |
1619 | insn->skip_offset, stack); | |
bf956ec0 MD |
1620 | if (merge_ret) { |
1621 | ret = merge_ret; | |
1622 | goto end; | |
97b58163 | 1623 | } |
47e5f13e MD |
1624 | |
1625 | if (!vstack_ax(stack)) { | |
1626 | ERR("Empty stack\n"); | |
1627 | ret = -EINVAL; | |
1628 | goto end; | |
1629 | } | |
1630 | /* There is always a cast-to-s64 operation before a or/and op. */ | |
1631 | switch (vstack_ax(stack)->type) { | |
1632 | case REG_S64: | |
d97f9b78 | 1633 | case REG_U64: |
47e5f13e MD |
1634 | break; |
1635 | default: | |
1636 | ERR("Incorrect register type %d for operation\n", | |
1637 | (int) vstack_ax(stack)->type); | |
1638 | ret = -EINVAL; | |
1639 | goto end; | |
1640 | } | |
1641 | ||
bf956ec0 | 1642 | /* Continue to next instruction */ |
71c1ceeb MD |
1643 | /* Pop 1 when jump not taken */ |
1644 | if (vstack_pop(stack)) { | |
1645 | ret = -EINVAL; | |
1646 | goto end; | |
1647 | } | |
bf956ec0 MD |
1648 | next_pc += sizeof(struct logical_op); |
1649 | break; | |
1650 | } | |
1651 | ||
77aa5901 | 1652 | /* load field ref */ |
04aa13f8 | 1653 | case BYTECODE_OP_LOAD_FIELD_REF: |
bf956ec0 MD |
1654 | { |
1655 | ERR("Unknown field ref type\n"); | |
1656 | ret = -EINVAL; | |
1657 | goto end; | |
1658 | } | |
77aa5901 | 1659 | /* get context ref */ |
04aa13f8 | 1660 | case BYTECODE_OP_GET_CONTEXT_REF: |
77aa5901 | 1661 | { |
53569322 MD |
1662 | if (vstack_push(stack)) { |
1663 | ret = -EINVAL; | |
1664 | goto end; | |
1665 | } | |
1666 | vstack_ax(stack)->type = REG_UNKNOWN; | |
1667 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1668 | break; | |
77aa5901 | 1669 | } |
04aa13f8 FD |
1670 | case BYTECODE_OP_LOAD_FIELD_REF_STRING: |
1671 | case BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE: | |
1672 | case BYTECODE_OP_GET_CONTEXT_REF_STRING: | |
bf956ec0 | 1673 | { |
0305960f MD |
1674 | if (vstack_push(stack)) { |
1675 | ret = -EINVAL; | |
1676 | goto end; | |
1677 | } | |
1678 | vstack_ax(stack)->type = REG_STRING; | |
bf956ec0 MD |
1679 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1680 | break; | |
1681 | } | |
04aa13f8 FD |
1682 | case BYTECODE_OP_LOAD_FIELD_REF_S64: |
1683 | case BYTECODE_OP_GET_CONTEXT_REF_S64: | |
bf956ec0 | 1684 | { |
0305960f MD |
1685 | if (vstack_push(stack)) { |
1686 | ret = -EINVAL; | |
1687 | goto end; | |
1688 | } | |
1689 | vstack_ax(stack)->type = REG_S64; | |
bf956ec0 MD |
1690 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1691 | break; | |
1692 | } | |
04aa13f8 FD |
1693 | case BYTECODE_OP_LOAD_FIELD_REF_DOUBLE: |
1694 | case BYTECODE_OP_GET_CONTEXT_REF_DOUBLE: | |
bf956ec0 | 1695 | { |
0305960f MD |
1696 | if (vstack_push(stack)) { |
1697 | ret = -EINVAL; | |
1698 | goto end; | |
1699 | } | |
1700 | vstack_ax(stack)->type = REG_DOUBLE; | |
bf956ec0 MD |
1701 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1702 | break; | |
1703 | } | |
1704 | ||
77aa5901 | 1705 | /* load from immediate operand */ |
04aa13f8 | 1706 | case BYTECODE_OP_LOAD_STRING: |
bf956ec0 MD |
1707 | { |
1708 | struct load_op *insn = (struct load_op *) pc; | |
1709 | ||
0305960f MD |
1710 | if (vstack_push(stack)) { |
1711 | ret = -EINVAL; | |
1712 | goto end; | |
1713 | } | |
1714 | vstack_ax(stack)->type = REG_STRING; | |
bf956ec0 MD |
1715 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
1716 | break; | |
1717 | } | |
1718 | ||
04aa13f8 | 1719 | case BYTECODE_OP_LOAD_STAR_GLOB_STRING: |
3151a51d PP |
1720 | { |
1721 | struct load_op *insn = (struct load_op *) pc; | |
1722 | ||
1723 | if (vstack_push(stack)) { | |
1724 | ret = -EINVAL; | |
1725 | goto end; | |
1726 | } | |
1727 | vstack_ax(stack)->type = REG_STAR_GLOB_STRING; | |
1728 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1729 | break; | |
1730 | } | |
1731 | ||
04aa13f8 | 1732 | case BYTECODE_OP_LOAD_S64: |
bf956ec0 | 1733 | { |
0305960f MD |
1734 | if (vstack_push(stack)) { |
1735 | ret = -EINVAL; | |
1736 | goto end; | |
1737 | } | |
1738 | vstack_ax(stack)->type = REG_S64; | |
bf956ec0 MD |
1739 | next_pc += sizeof(struct load_op) |
1740 | + sizeof(struct literal_numeric); | |
1741 | break; | |
1742 | } | |
1743 | ||
04aa13f8 | 1744 | case BYTECODE_OP_LOAD_DOUBLE: |
bf956ec0 | 1745 | { |
0305960f MD |
1746 | if (vstack_push(stack)) { |
1747 | ret = -EINVAL; | |
1748 | goto end; | |
1749 | } | |
1750 | vstack_ax(stack)->type = REG_DOUBLE; | |
bf956ec0 MD |
1751 | next_pc += sizeof(struct load_op) |
1752 | + sizeof(struct literal_double); | |
1753 | break; | |
1754 | } | |
1755 | ||
04aa13f8 FD |
1756 | case BYTECODE_OP_CAST_TO_S64: |
1757 | case BYTECODE_OP_CAST_DOUBLE_TO_S64: | |
bf956ec0 | 1758 | { |
0305960f MD |
1759 | /* Pop 1, push 1 */ |
1760 | if (!vstack_ax(stack)) { | |
1761 | ERR("Empty stack\n"); | |
1762 | ret = -EINVAL; | |
1763 | goto end; | |
1764 | } | |
47e5f13e MD |
1765 | switch (vstack_ax(stack)->type) { |
1766 | case REG_S64: | |
d97f9b78 | 1767 | case REG_U64: |
47e5f13e MD |
1768 | case REG_DOUBLE: |
1769 | case REG_UNKNOWN: | |
1770 | break; | |
1771 | default: | |
1772 | ERR("Incorrect register type %d for cast\n", | |
1773 | (int) vstack_ax(stack)->type); | |
1774 | ret = -EINVAL; | |
1775 | goto end; | |
1776 | } | |
0305960f | 1777 | vstack_ax(stack)->type = REG_S64; |
bf956ec0 MD |
1778 | next_pc += sizeof(struct cast_op); |
1779 | break; | |
1780 | } | |
04aa13f8 | 1781 | case BYTECODE_OP_CAST_NOP: |
bf956ec0 MD |
1782 | { |
1783 | next_pc += sizeof(struct cast_op); | |
1784 | break; | |
1785 | } | |
97b58163 | 1786 | |
47e5f13e MD |
1787 | /* |
1788 | * Instructions for recursive traversal through composed types. | |
1789 | */ | |
04aa13f8 FD |
1790 | case BYTECODE_OP_GET_CONTEXT_ROOT: |
1791 | case BYTECODE_OP_GET_APP_CONTEXT_ROOT: | |
1792 | case BYTECODE_OP_GET_PAYLOAD_ROOT: | |
47e5f13e MD |
1793 | { |
1794 | if (vstack_push(stack)) { | |
1795 | ret = -EINVAL; | |
1796 | goto end; | |
1797 | } | |
1798 | vstack_ax(stack)->type = REG_PTR; | |
1799 | next_pc += sizeof(struct load_op); | |
1800 | break; | |
1801 | } | |
1802 | ||
04aa13f8 | 1803 | case BYTECODE_OP_LOAD_FIELD: |
47e5f13e MD |
1804 | { |
1805 | /* Pop 1, push 1 */ | |
1806 | if (!vstack_ax(stack)) { | |
1807 | ERR("Empty stack\n"); | |
1808 | ret = -EINVAL; | |
1809 | goto end; | |
1810 | } | |
1811 | if (vstack_ax(stack)->type != REG_PTR) { | |
1812 | ERR("Expecting pointer on top of stack\n"); | |
1813 | ret = -EINVAL; | |
1814 | goto end; | |
1815 | } | |
1816 | vstack_ax(stack)->type = REG_UNKNOWN; | |
1817 | next_pc += sizeof(struct load_op); | |
1818 | break; | |
1819 | } | |
1820 | ||
04aa13f8 FD |
1821 | case BYTECODE_OP_LOAD_FIELD_S8: |
1822 | case BYTECODE_OP_LOAD_FIELD_S16: | |
1823 | case BYTECODE_OP_LOAD_FIELD_S32: | |
1824 | case BYTECODE_OP_LOAD_FIELD_S64: | |
d97f9b78 MD |
1825 | { |
1826 | /* Pop 1, push 1 */ | |
1827 | if (!vstack_ax(stack)) { | |
1828 | ERR("Empty stack\n"); | |
1829 | ret = -EINVAL; | |
1830 | goto end; | |
1831 | } | |
1832 | if (vstack_ax(stack)->type != REG_PTR) { | |
1833 | ERR("Expecting pointer on top of stack\n"); | |
1834 | ret = -EINVAL; | |
1835 | goto end; | |
1836 | } | |
1837 | vstack_ax(stack)->type = REG_S64; | |
1838 | next_pc += sizeof(struct load_op); | |
1839 | break; | |
1840 | } | |
1841 | ||
04aa13f8 FD |
1842 | case BYTECODE_OP_LOAD_FIELD_U8: |
1843 | case BYTECODE_OP_LOAD_FIELD_U16: | |
1844 | case BYTECODE_OP_LOAD_FIELD_U32: | |
1845 | case BYTECODE_OP_LOAD_FIELD_U64: | |
47e5f13e MD |
1846 | { |
1847 | /* Pop 1, push 1 */ | |
1848 | if (!vstack_ax(stack)) { | |
1849 | ERR("Empty stack\n"); | |
1850 | ret = -EINVAL; | |
1851 | goto end; | |
1852 | } | |
1853 | if (vstack_ax(stack)->type != REG_PTR) { | |
1854 | ERR("Expecting pointer on top of stack\n"); | |
1855 | ret = -EINVAL; | |
1856 | goto end; | |
1857 | } | |
d97f9b78 | 1858 | vstack_ax(stack)->type = REG_U64; |
47e5f13e MD |
1859 | next_pc += sizeof(struct load_op); |
1860 | break; | |
1861 | } | |
1862 | ||
04aa13f8 FD |
1863 | case BYTECODE_OP_LOAD_FIELD_STRING: |
1864 | case BYTECODE_OP_LOAD_FIELD_SEQUENCE: | |
47e5f13e MD |
1865 | { |
1866 | /* Pop 1, push 1 */ | |
1867 | if (!vstack_ax(stack)) { | |
1868 | ERR("Empty stack\n"); | |
1869 | ret = -EINVAL; | |
1870 | goto end; | |
1871 | } | |
1872 | if (vstack_ax(stack)->type != REG_PTR) { | |
1873 | ERR("Expecting pointer on top of stack\n"); | |
1874 | ret = -EINVAL; | |
1875 | goto end; | |
1876 | } | |
1877 | vstack_ax(stack)->type = REG_STRING; | |
1878 | next_pc += sizeof(struct load_op); | |
1879 | break; | |
1880 | } | |
1881 | ||
04aa13f8 | 1882 | case BYTECODE_OP_LOAD_FIELD_DOUBLE: |
47e5f13e MD |
1883 | { |
1884 | /* Pop 1, push 1 */ | |
1885 | if (!vstack_ax(stack)) { | |
1886 | ERR("Empty stack\n"); | |
1887 | ret = -EINVAL; | |
1888 | goto end; | |
1889 | } | |
1890 | if (vstack_ax(stack)->type != REG_PTR) { | |
1891 | ERR("Expecting pointer on top of stack\n"); | |
1892 | ret = -EINVAL; | |
1893 | goto end; | |
1894 | } | |
1895 | vstack_ax(stack)->type = REG_DOUBLE; | |
1896 | next_pc += sizeof(struct load_op); | |
1897 | break; | |
1898 | } | |
1899 | ||
04aa13f8 FD |
1900 | case BYTECODE_OP_GET_SYMBOL: |
1901 | case BYTECODE_OP_GET_SYMBOL_FIELD: | |
47e5f13e MD |
1902 | { |
1903 | /* Pop 1, push 1 */ | |
1904 | if (!vstack_ax(stack)) { | |
1905 | ERR("Empty stack\n"); | |
1906 | ret = -EINVAL; | |
1907 | goto end; | |
1908 | } | |
1909 | if (vstack_ax(stack)->type != REG_PTR) { | |
1910 | ERR("Expecting pointer on top of stack\n"); | |
1911 | ret = -EINVAL; | |
1912 | goto end; | |
1913 | } | |
1914 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1915 | break; | |
1916 | } | |
1917 | ||
04aa13f8 | 1918 | case BYTECODE_OP_GET_INDEX_U16: |
47e5f13e MD |
1919 | { |
1920 | /* Pop 1, push 1 */ | |
1921 | if (!vstack_ax(stack)) { | |
1922 | ERR("Empty stack\n"); | |
1923 | ret = -EINVAL; | |
1924 | goto end; | |
1925 | } | |
1926 | if (vstack_ax(stack)->type != REG_PTR) { | |
1927 | ERR("Expecting pointer on top of stack\n"); | |
1928 | ret = -EINVAL; | |
1929 | goto end; | |
1930 | } | |
1931 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); | |
1932 | break; | |
1933 | } | |
1934 | ||
04aa13f8 | 1935 | case BYTECODE_OP_GET_INDEX_U64: |
47e5f13e MD |
1936 | { |
1937 | /* Pop 1, push 1 */ | |
1938 | if (!vstack_ax(stack)) { | |
1939 | ERR("Empty stack\n"); | |
1940 | ret = -EINVAL; | |
1941 | goto end; | |
1942 | } | |
1943 | if (vstack_ax(stack)->type != REG_PTR) { | |
1944 | ERR("Expecting pointer on top of stack\n"); | |
1945 | ret = -EINVAL; | |
1946 | goto end; | |
1947 | } | |
1948 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); | |
1949 | break; | |
1950 | } | |
1951 | ||
bf956ec0 MD |
1952 | } |
1953 | end: | |
1954 | *_next_pc = next_pc; | |
1955 | return ret; | |
1956 | } | |
1957 | ||
1958 | /* | |
1959 | * Never called concurrently (hash seed is shared). | |
1960 | */ | |
04aa13f8 | 1961 | int lttng_bytecode_validate(struct bytecode_runtime *bytecode) |
bf956ec0 MD |
1962 | { |
1963 | struct cds_lfht *merge_points; | |
22389ecb | 1964 | char *pc, *next_pc, *start_pc; |
bf956ec0 | 1965 | int ret = -EINVAL; |
0305960f | 1966 | struct vstack stack; |
bf956ec0 | 1967 | |
0305960f | 1968 | vstack_init(&stack); |
bf956ec0 MD |
1969 | |
1970 | if (!lttng_hash_seed_ready) { | |
1971 | lttng_hash_seed = time(NULL); | |
1972 | lttng_hash_seed_ready = 1; | |
1973 | } | |
1974 | /* | |
1975 | * Note: merge_points hash table used by single thread, and | |
1976 | * never concurrently resized. Therefore, we can use it without | |
1977 | * holding RCU read-side lock and free nodes without using | |
1978 | * call_rcu. | |
1979 | */ | |
1980 | merge_points = cds_lfht_new(DEFAULT_NR_MERGE_POINTS, | |
1981 | MIN_NR_BUCKETS, MAX_NR_BUCKETS, | |
1982 | 0, NULL); | |
1983 | if (!merge_points) { | |
1984 | ERR("Error allocating hash table for bytecode validation\n"); | |
1985 | return -ENOMEM; | |
1986 | } | |
47e5f13e | 1987 | start_pc = &bytecode->code[0]; |
bf956ec0 MD |
1988 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; |
1989 | pc = next_pc) { | |
82513dbe MD |
1990 | ret = bytecode_validate_overflow(bytecode, start_pc, pc); |
1991 | if (ret != 0) { | |
1992 | if (ret == -ERANGE) | |
04aa13f8 | 1993 | ERR("Bytecode overflow\n"); |
bf956ec0 | 1994 | goto end; |
97b58163 | 1995 | } |
bf956ec0 | 1996 | dbg_printf("Validating op %s (%u)\n", |
04aa13f8 FD |
1997 | print_op((unsigned int) *(bytecode_opcode_t *) pc), |
1998 | (unsigned int) *(bytecode_opcode_t *) pc); | |
bf956ec0 MD |
1999 | |
2000 | /* | |
2001 | * For each instruction, validate the current context | |
2002 | * (traversal of entire execution flow), and validate | |
53569322 | 2003 | * all merge points targeting this instruction. |
bf956ec0 MD |
2004 | */ |
2005 | ret = validate_instruction_all_contexts(bytecode, merge_points, | |
0305960f | 2006 | &stack, start_pc, pc); |
bf956ec0 MD |
2007 | if (ret) |
2008 | goto end; | |
0305960f | 2009 | ret = exec_insn(bytecode, merge_points, &stack, &next_pc, pc); |
bf956ec0 MD |
2010 | if (ret <= 0) |
2011 | goto end; | |
97b58163 MD |
2012 | } |
2013 | end: | |
bf956ec0 MD |
2014 | if (delete_all_nodes(merge_points)) { |
2015 | if (!ret) { | |
2016 | ERR("Unexpected merge points\n"); | |
2017 | ret = -EINVAL; | |
2018 | } | |
2019 | } | |
2020 | if (cds_lfht_destroy(merge_points, NULL)) { | |
2021 | ERR("Error destroying hash table\n"); | |
2022 | } | |
97b58163 MD |
2023 | return ret; |
2024 | } |