Commit | Line | Data |
---|---|---|
97b58163 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: MIT |
97b58163 | 3 | * |
7e50015d | 4 | * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
97b58163 | 5 | * |
c0c0989a | 6 | * LTTng UST bytecode validator. |
97b58163 MD |
7 | */ |
8 | ||
bf956ec0 | 9 | #define _LGPL_SOURCE |
b4051ad8 | 10 | #include <stddef.h> |
fb31eb73 | 11 | #include <stdint.h> |
bf956ec0 | 12 | #include <time.h> |
97b58163 | 13 | |
10544ee8 | 14 | #include "rculfhash.h" |
fb31eb73 | 15 | |
04aa13f8 | 16 | #include "lttng-bytecode.h" |
bf956ec0 | 17 | #include "lttng-hash-helper.h" |
3151a51d | 18 | #include "string-utils.h" |
92495593 | 19 | #include "ust-events-internal.h" |
ddabe860 | 20 | #include "ust-helper.h" |
bf956ec0 | 21 | |
0305960f MD |
22 | /* |
23 | * Number of merge points for hash table size. Hash table initialized to | |
24 | * that size, and we do not resize, because we do not want to trigger | |
25 | * RCU worker thread execution: fall-back on linear traversal if number | |
26 | * of merge points exceeds this value. | |
27 | */ | |
28 | #define DEFAULT_NR_MERGE_POINTS 128 | |
29 | #define MIN_NR_BUCKETS 128 | |
30 | #define MAX_NR_BUCKETS 128 | |
31 | ||
bf956ec0 MD |
32 | /* merge point table node */ |
33 | struct lfht_mp_node { | |
10544ee8 | 34 | struct lttng_ust_lfht_node node; |
bf956ec0 MD |
35 | |
36 | /* Context at merge point */ | |
0305960f | 37 | struct vstack stack; |
bf956ec0 MD |
38 | unsigned long target_pc; |
39 | }; | |
40 | ||
41 | static unsigned long lttng_hash_seed; | |
42 | static unsigned int lttng_hash_seed_ready; | |
43 | ||
44 | static | |
10544ee8 | 45 | int lttng_hash_match(struct lttng_ust_lfht_node *node, const void *key) |
bf956ec0 MD |
46 | { |
47 | struct lfht_mp_node *mp_node = | |
48 | caa_container_of(node, struct lfht_mp_node, node); | |
49 | unsigned long key_pc = (unsigned long) key; | |
50 | ||
51 | if (mp_node->target_pc == key_pc) | |
52 | return 1; | |
53 | else | |
54 | return 0; | |
55 | } | |
56 | ||
57 | static | |
71c1ceeb MD |
58 | int merge_points_compare(const struct vstack *stacka, |
59 | const struct vstack *stackb) | |
60 | { | |
61 | int i, len; | |
62 | ||
63 | if (stacka->top != stackb->top) | |
64 | return 1; | |
65 | len = stacka->top + 1; | |
66 | assert(len >= 0); | |
67 | for (i = 0; i < len; i++) { | |
53569322 MD |
68 | if (stacka->e[i].type != REG_UNKNOWN |
69 | && stackb->e[i].type != REG_UNKNOWN | |
70 | && stacka->e[i].type != stackb->e[i].type) | |
71c1ceeb MD |
71 | return 1; |
72 | } | |
73 | return 0; | |
74 | } | |
75 | ||
76 | static | |
10544ee8 | 77 | int merge_point_add_check(struct lttng_ust_lfht *ht, unsigned long target_pc, |
0305960f | 78 | const struct vstack *stack) |
bf956ec0 MD |
79 | { |
80 | struct lfht_mp_node *node; | |
22389ecb | 81 | unsigned long hash = lttng_hash_mix((const char *) target_pc, |
bf956ec0 MD |
82 | sizeof(target_pc), |
83 | lttng_hash_seed); | |
10544ee8 | 84 | struct lttng_ust_lfht_node *ret; |
bf956ec0 | 85 | |
04aa13f8 | 86 | dbg_printf("Bytecode: adding merge point at offset %lu, hash %lu\n", |
bf956ec0 MD |
87 | target_pc, hash); |
88 | node = zmalloc(sizeof(struct lfht_mp_node)); | |
89 | if (!node) | |
90 | return -ENOMEM; | |
91 | node->target_pc = target_pc; | |
0305960f | 92 | memcpy(&node->stack, stack, sizeof(node->stack)); |
10544ee8 | 93 | ret = lttng_ust_lfht_add_unique(ht, hash, lttng_hash_match, |
22389ecb | 94 | (const char *) target_pc, &node->node); |
71c1ceeb MD |
95 | if (ret != &node->node) { |
96 | struct lfht_mp_node *ret_mp = | |
97 | caa_container_of(ret, struct lfht_mp_node, node); | |
98 | ||
99 | /* Key already present */ | |
04aa13f8 | 100 | dbg_printf("Bytecode: compare merge points for offset %lu, hash %lu\n", |
71c1ceeb MD |
101 | target_pc, hash); |
102 | free(node); | |
103 | if (merge_points_compare(stack, &ret_mp->stack)) { | |
104 | ERR("Merge points differ for offset %lu\n", | |
105 | target_pc); | |
106 | return -EINVAL; | |
107 | } | |
108 | } | |
bf956ec0 MD |
109 | return 0; |
110 | } | |
111 | ||
112 | /* | |
0305960f | 113 | * Binary comparators use top of stack and top of stack -1. |
53569322 MD |
114 | * Return 0 if typing is known to match, 1 if typing is dynamic |
115 | * (unknown), negative error value on error. | |
bf956ec0 | 116 | */ |
97b58163 | 117 | static |
04aa13f8 | 118 | int bin_op_compare_check(struct vstack *stack, bytecode_opcode_t opcode, |
3151a51d | 119 | const char *str) |
97b58163 | 120 | { |
0305960f | 121 | if (unlikely(!vstack_ax(stack) || !vstack_bx(stack))) |
53569322 | 122 | goto error_empty; |
0305960f MD |
123 | |
124 | switch (vstack_ax(stack)->type) { | |
97b58163 | 125 | default: |
53569322 | 126 | goto error_type; |
97b58163 | 127 | |
53569322 MD |
128 | case REG_UNKNOWN: |
129 | goto unknown; | |
97b58163 | 130 | case REG_STRING: |
0305960f | 131 | switch (vstack_bx(stack)->type) { |
97b58163 | 132 | default: |
53569322 | 133 | goto error_type; |
97b58163 | 134 | |
53569322 MD |
135 | case REG_UNKNOWN: |
136 | goto unknown; | |
97b58163 MD |
137 | case REG_STRING: |
138 | break; | |
3151a51d | 139 | case REG_STAR_GLOB_STRING: |
04aa13f8 | 140 | if (opcode != BYTECODE_OP_EQ && opcode != BYTECODE_OP_NE) { |
3151a51d PP |
141 | goto error_mismatch; |
142 | } | |
143 | break; | |
144 | case REG_S64: | |
d97f9b78 | 145 | case REG_U64: |
3151a51d PP |
146 | case REG_DOUBLE: |
147 | goto error_mismatch; | |
148 | } | |
149 | break; | |
150 | case REG_STAR_GLOB_STRING: | |
151 | switch (vstack_bx(stack)->type) { | |
152 | default: | |
153 | goto error_type; | |
154 | ||
155 | case REG_UNKNOWN: | |
156 | goto unknown; | |
157 | case REG_STRING: | |
04aa13f8 | 158 | if (opcode != BYTECODE_OP_EQ && opcode != BYTECODE_OP_NE) { |
3151a51d PP |
159 | goto error_mismatch; |
160 | } | |
161 | break; | |
162 | case REG_STAR_GLOB_STRING: | |
97b58163 | 163 | case REG_S64: |
d97f9b78 | 164 | case REG_U64: |
97b58163 MD |
165 | case REG_DOUBLE: |
166 | goto error_mismatch; | |
167 | } | |
168 | break; | |
169 | case REG_S64: | |
d97f9b78 | 170 | case REG_U64: |
97b58163 | 171 | case REG_DOUBLE: |
0305960f | 172 | switch (vstack_bx(stack)->type) { |
97b58163 | 173 | default: |
53569322 | 174 | goto error_type; |
97b58163 | 175 | |
53569322 MD |
176 | case REG_UNKNOWN: |
177 | goto unknown; | |
97b58163 | 178 | case REG_STRING: |
3151a51d | 179 | case REG_STAR_GLOB_STRING: |
97b58163 | 180 | goto error_mismatch; |
97b58163 | 181 | case REG_S64: |
d97f9b78 | 182 | case REG_U64: |
97b58163 MD |
183 | case REG_DOUBLE: |
184 | break; | |
185 | } | |
186 | break; | |
187 | } | |
188 | return 0; | |
189 | ||
53569322 MD |
190 | unknown: |
191 | return 1; | |
0305960f | 192 | |
97b58163 MD |
193 | error_mismatch: |
194 | ERR("type mismatch for '%s' binary operator\n", str); | |
195 | return -EINVAL; | |
53569322 MD |
196 | |
197 | error_empty: | |
198 | ERR("empty stack for '%s' binary operator\n", str); | |
199 | return -EINVAL; | |
200 | ||
201 | error_type: | |
202 | ERR("unknown type for '%s' binary operator\n", str); | |
203 | return -EINVAL; | |
97b58163 MD |
204 | } |
205 | ||
47e5f13e MD |
206 | /* |
207 | * Binary bitwise operators use top of stack and top of stack -1. | |
208 | * Return 0 if typing is known to match, 1 if typing is dynamic | |
209 | * (unknown), negative error value on error. | |
210 | */ | |
211 | static | |
04aa13f8 | 212 | int bin_op_bitwise_check(struct vstack *stack, bytecode_opcode_t opcode, |
47e5f13e MD |
213 | const char *str) |
214 | { | |
215 | if (unlikely(!vstack_ax(stack) || !vstack_bx(stack))) | |
216 | goto error_empty; | |
217 | ||
218 | switch (vstack_ax(stack)->type) { | |
219 | default: | |
220 | goto error_type; | |
221 | ||
222 | case REG_UNKNOWN: | |
223 | goto unknown; | |
224 | case REG_S64: | |
d97f9b78 | 225 | case REG_U64: |
47e5f13e MD |
226 | switch (vstack_bx(stack)->type) { |
227 | default: | |
228 | goto error_type; | |
229 | ||
230 | case REG_UNKNOWN: | |
231 | goto unknown; | |
232 | case REG_S64: | |
d97f9b78 | 233 | case REG_U64: |
47e5f13e MD |
234 | break; |
235 | } | |
236 | break; | |
237 | } | |
238 | return 0; | |
239 | ||
240 | unknown: | |
241 | return 1; | |
242 | ||
243 | error_empty: | |
244 | ERR("empty stack for '%s' binary operator\n", str); | |
245 | return -EINVAL; | |
246 | ||
247 | error_type: | |
248 | ERR("unknown type for '%s' binary operator\n", str); | |
249 | return -EINVAL; | |
250 | } | |
251 | ||
252 | static | |
253 | int validate_get_symbol(struct bytecode_runtime *bytecode, | |
254 | const struct get_symbol *sym) | |
255 | { | |
256 | const char *str, *str_limit; | |
257 | size_t len_limit; | |
258 | ||
362a65de | 259 | if (sym->offset >= bytecode->p.priv->bc->bc.len - bytecode->p.priv->bc->bc.reloc_offset) |
47e5f13e MD |
260 | return -EINVAL; |
261 | ||
362a65de MD |
262 | str = bytecode->p.priv->bc->bc.data + bytecode->p.priv->bc->bc.reloc_offset + sym->offset; |
263 | str_limit = bytecode->p.priv->bc->bc.data + bytecode->p.priv->bc->bc.len; | |
47e5f13e MD |
264 | len_limit = str_limit - str; |
265 | if (strnlen(str, len_limit) == len_limit) | |
266 | return -EINVAL; | |
267 | return 0; | |
268 | } | |
269 | ||
97b58163 MD |
270 | /* |
271 | * Validate bytecode range overflow within the validation pass. | |
272 | * Called for each instruction encountered. | |
273 | */ | |
274 | static | |
275 | int bytecode_validate_overflow(struct bytecode_runtime *bytecode, | |
22389ecb | 276 | char *start_pc, char *pc) |
97b58163 MD |
277 | { |
278 | int ret = 0; | |
279 | ||
04aa13f8 FD |
280 | switch (*(bytecode_opcode_t *) pc) { |
281 | case BYTECODE_OP_UNKNOWN: | |
97b58163 MD |
282 | default: |
283 | { | |
284 | ERR("unknown bytecode op %u\n", | |
04aa13f8 | 285 | (unsigned int) *(bytecode_opcode_t *) pc); |
97b58163 MD |
286 | ret = -EINVAL; |
287 | break; | |
288 | } | |
289 | ||
04aa13f8 FD |
290 | case BYTECODE_OP_RETURN: |
291 | case BYTECODE_OP_RETURN_S64: | |
97b58163 MD |
292 | { |
293 | if (unlikely(pc + sizeof(struct return_op) | |
294 | > start_pc + bytecode->len)) { | |
82513dbe | 295 | ret = -ERANGE; |
97b58163 MD |
296 | } |
297 | break; | |
298 | } | |
299 | ||
300 | /* binary */ | |
04aa13f8 FD |
301 | case BYTECODE_OP_MUL: |
302 | case BYTECODE_OP_DIV: | |
303 | case BYTECODE_OP_MOD: | |
304 | case BYTECODE_OP_PLUS: | |
305 | case BYTECODE_OP_MINUS: | |
97b58163 MD |
306 | { |
307 | ERR("unsupported bytecode op %u\n", | |
04aa13f8 | 308 | (unsigned int) *(bytecode_opcode_t *) pc); |
97b58163 MD |
309 | ret = -EINVAL; |
310 | break; | |
311 | } | |
312 | ||
04aa13f8 FD |
313 | case BYTECODE_OP_EQ: |
314 | case BYTECODE_OP_NE: | |
315 | case BYTECODE_OP_GT: | |
316 | case BYTECODE_OP_LT: | |
317 | case BYTECODE_OP_GE: | |
318 | case BYTECODE_OP_LE: | |
319 | case BYTECODE_OP_EQ_STRING: | |
320 | case BYTECODE_OP_NE_STRING: | |
321 | case BYTECODE_OP_GT_STRING: | |
322 | case BYTECODE_OP_LT_STRING: | |
323 | case BYTECODE_OP_GE_STRING: | |
324 | case BYTECODE_OP_LE_STRING: | |
325 | case BYTECODE_OP_EQ_STAR_GLOB_STRING: | |
326 | case BYTECODE_OP_NE_STAR_GLOB_STRING: | |
327 | case BYTECODE_OP_EQ_S64: | |
328 | case BYTECODE_OP_NE_S64: | |
329 | case BYTECODE_OP_GT_S64: | |
330 | case BYTECODE_OP_LT_S64: | |
331 | case BYTECODE_OP_GE_S64: | |
332 | case BYTECODE_OP_LE_S64: | |
333 | case BYTECODE_OP_EQ_DOUBLE: | |
334 | case BYTECODE_OP_NE_DOUBLE: | |
335 | case BYTECODE_OP_GT_DOUBLE: | |
336 | case BYTECODE_OP_LT_DOUBLE: | |
337 | case BYTECODE_OP_GE_DOUBLE: | |
338 | case BYTECODE_OP_LE_DOUBLE: | |
339 | case BYTECODE_OP_EQ_DOUBLE_S64: | |
340 | case BYTECODE_OP_NE_DOUBLE_S64: | |
341 | case BYTECODE_OP_GT_DOUBLE_S64: | |
342 | case BYTECODE_OP_LT_DOUBLE_S64: | |
343 | case BYTECODE_OP_GE_DOUBLE_S64: | |
344 | case BYTECODE_OP_LE_DOUBLE_S64: | |
345 | case BYTECODE_OP_EQ_S64_DOUBLE: | |
346 | case BYTECODE_OP_NE_S64_DOUBLE: | |
347 | case BYTECODE_OP_GT_S64_DOUBLE: | |
348 | case BYTECODE_OP_LT_S64_DOUBLE: | |
349 | case BYTECODE_OP_GE_S64_DOUBLE: | |
350 | case BYTECODE_OP_LE_S64_DOUBLE: | |
351 | case BYTECODE_OP_BIT_RSHIFT: | |
352 | case BYTECODE_OP_BIT_LSHIFT: | |
353 | case BYTECODE_OP_BIT_AND: | |
354 | case BYTECODE_OP_BIT_OR: | |
355 | case BYTECODE_OP_BIT_XOR: | |
97b58163 MD |
356 | { |
357 | if (unlikely(pc + sizeof(struct binary_op) | |
358 | > start_pc + bytecode->len)) { | |
82513dbe | 359 | ret = -ERANGE; |
97b58163 MD |
360 | } |
361 | break; | |
362 | } | |
363 | ||
364 | /* unary */ | |
04aa13f8 FD |
365 | case BYTECODE_OP_UNARY_PLUS: |
366 | case BYTECODE_OP_UNARY_MINUS: | |
367 | case BYTECODE_OP_UNARY_NOT: | |
368 | case BYTECODE_OP_UNARY_PLUS_S64: | |
369 | case BYTECODE_OP_UNARY_MINUS_S64: | |
370 | case BYTECODE_OP_UNARY_NOT_S64: | |
371 | case BYTECODE_OP_UNARY_PLUS_DOUBLE: | |
372 | case BYTECODE_OP_UNARY_MINUS_DOUBLE: | |
373 | case BYTECODE_OP_UNARY_NOT_DOUBLE: | |
374 | case BYTECODE_OP_UNARY_BIT_NOT: | |
97b58163 MD |
375 | { |
376 | if (unlikely(pc + sizeof(struct unary_op) | |
377 | > start_pc + bytecode->len)) { | |
82513dbe | 378 | ret = -ERANGE; |
97b58163 MD |
379 | } |
380 | break; | |
381 | } | |
382 | ||
383 | /* logical */ | |
04aa13f8 FD |
384 | case BYTECODE_OP_AND: |
385 | case BYTECODE_OP_OR: | |
97b58163 MD |
386 | { |
387 | if (unlikely(pc + sizeof(struct logical_op) | |
388 | > start_pc + bytecode->len)) { | |
82513dbe | 389 | ret = -ERANGE; |
97b58163 MD |
390 | } |
391 | break; | |
392 | } | |
393 | ||
77aa5901 | 394 | /* load field ref */ |
04aa13f8 | 395 | case BYTECODE_OP_LOAD_FIELD_REF: |
97b58163 MD |
396 | { |
397 | ERR("Unknown field ref type\n"); | |
398 | ret = -EINVAL; | |
399 | break; | |
400 | } | |
47e5f13e | 401 | |
77aa5901 | 402 | /* get context ref */ |
04aa13f8 FD |
403 | case BYTECODE_OP_GET_CONTEXT_REF: |
404 | case BYTECODE_OP_LOAD_FIELD_REF_STRING: | |
405 | case BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE: | |
406 | case BYTECODE_OP_LOAD_FIELD_REF_S64: | |
407 | case BYTECODE_OP_LOAD_FIELD_REF_DOUBLE: | |
408 | case BYTECODE_OP_GET_CONTEXT_REF_STRING: | |
409 | case BYTECODE_OP_GET_CONTEXT_REF_S64: | |
410 | case BYTECODE_OP_GET_CONTEXT_REF_DOUBLE: | |
97b58163 MD |
411 | { |
412 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct field_ref) | |
413 | > start_pc + bytecode->len)) { | |
82513dbe | 414 | ret = -ERANGE; |
97b58163 MD |
415 | } |
416 | break; | |
417 | } | |
418 | ||
77aa5901 | 419 | /* load from immediate operand */ |
04aa13f8 FD |
420 | case BYTECODE_OP_LOAD_STRING: |
421 | case BYTECODE_OP_LOAD_STAR_GLOB_STRING: | |
97b58163 MD |
422 | { |
423 | struct load_op *insn = (struct load_op *) pc; | |
424 | uint32_t str_len, maxlen; | |
425 | ||
426 | if (unlikely(pc + sizeof(struct load_op) | |
427 | > start_pc + bytecode->len)) { | |
82513dbe | 428 | ret = -ERANGE; |
97b58163 MD |
429 | break; |
430 | } | |
431 | ||
432 | maxlen = start_pc + bytecode->len - pc - sizeof(struct load_op); | |
433 | str_len = strnlen(insn->data, maxlen); | |
434 | if (unlikely(str_len >= maxlen)) { | |
435 | /* Final '\0' not found within range */ | |
82513dbe | 436 | ret = -ERANGE; |
97b58163 MD |
437 | } |
438 | break; | |
439 | } | |
440 | ||
04aa13f8 | 441 | case BYTECODE_OP_LOAD_S64: |
97b58163 MD |
442 | { |
443 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct literal_numeric) | |
444 | > start_pc + bytecode->len)) { | |
82513dbe | 445 | ret = -ERANGE; |
97b58163 MD |
446 | } |
447 | break; | |
448 | } | |
449 | ||
04aa13f8 | 450 | case BYTECODE_OP_LOAD_DOUBLE: |
97b58163 MD |
451 | { |
452 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct literal_double) | |
453 | > start_pc + bytecode->len)) { | |
82513dbe | 454 | ret = -ERANGE; |
97b58163 MD |
455 | } |
456 | break; | |
457 | } | |
458 | ||
04aa13f8 FD |
459 | case BYTECODE_OP_CAST_TO_S64: |
460 | case BYTECODE_OP_CAST_DOUBLE_TO_S64: | |
461 | case BYTECODE_OP_CAST_NOP: | |
97b58163 MD |
462 | { |
463 | if (unlikely(pc + sizeof(struct cast_op) | |
464 | > start_pc + bytecode->len)) { | |
82513dbe | 465 | ret = -ERANGE; |
97b58163 MD |
466 | } |
467 | break; | |
468 | } | |
77aa5901 | 469 | |
47e5f13e MD |
470 | /* |
471 | * Instructions for recursive traversal through composed types. | |
472 | */ | |
04aa13f8 FD |
473 | case BYTECODE_OP_GET_CONTEXT_ROOT: |
474 | case BYTECODE_OP_GET_APP_CONTEXT_ROOT: | |
475 | case BYTECODE_OP_GET_PAYLOAD_ROOT: | |
476 | case BYTECODE_OP_LOAD_FIELD: | |
477 | case BYTECODE_OP_LOAD_FIELD_S8: | |
478 | case BYTECODE_OP_LOAD_FIELD_S16: | |
479 | case BYTECODE_OP_LOAD_FIELD_S32: | |
480 | case BYTECODE_OP_LOAD_FIELD_S64: | |
481 | case BYTECODE_OP_LOAD_FIELD_U8: | |
482 | case BYTECODE_OP_LOAD_FIELD_U16: | |
483 | case BYTECODE_OP_LOAD_FIELD_U32: | |
484 | case BYTECODE_OP_LOAD_FIELD_U64: | |
485 | case BYTECODE_OP_LOAD_FIELD_STRING: | |
486 | case BYTECODE_OP_LOAD_FIELD_SEQUENCE: | |
487 | case BYTECODE_OP_LOAD_FIELD_DOUBLE: | |
47e5f13e MD |
488 | if (unlikely(pc + sizeof(struct load_op) |
489 | > start_pc + bytecode->len)) { | |
490 | ret = -ERANGE; | |
491 | } | |
492 | break; | |
493 | ||
04aa13f8 | 494 | case BYTECODE_OP_GET_SYMBOL: |
47e5f13e MD |
495 | { |
496 | struct load_op *insn = (struct load_op *) pc; | |
497 | struct get_symbol *sym = (struct get_symbol *) insn->data; | |
498 | ||
499 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct get_symbol) | |
500 | > start_pc + bytecode->len)) { | |
501 | ret = -ERANGE; | |
90732639 | 502 | break; |
47e5f13e MD |
503 | } |
504 | ret = validate_get_symbol(bytecode, sym); | |
505 | break; | |
506 | } | |
507 | ||
04aa13f8 | 508 | case BYTECODE_OP_GET_SYMBOL_FIELD: |
47e5f13e MD |
509 | ERR("Unexpected get symbol field"); |
510 | ret = -EINVAL; | |
511 | break; | |
512 | ||
04aa13f8 | 513 | case BYTECODE_OP_GET_INDEX_U16: |
47e5f13e MD |
514 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct get_index_u16) |
515 | > start_pc + bytecode->len)) { | |
516 | ret = -ERANGE; | |
517 | } | |
518 | break; | |
519 | ||
04aa13f8 | 520 | case BYTECODE_OP_GET_INDEX_U64: |
47e5f13e MD |
521 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct get_index_u64) |
522 | > start_pc + bytecode->len)) { | |
523 | ret = -ERANGE; | |
524 | } | |
525 | break; | |
97b58163 MD |
526 | } |
527 | ||
528 | return ret; | |
529 | } | |
530 | ||
bf956ec0 | 531 | static |
10544ee8 | 532 | unsigned long delete_all_nodes(struct lttng_ust_lfht *ht) |
97b58163 | 533 | { |
10544ee8 | 534 | struct lttng_ust_lfht_iter iter; |
bf956ec0 MD |
535 | struct lfht_mp_node *node; |
536 | unsigned long nr_nodes = 0; | |
97b58163 | 537 | |
10544ee8 | 538 | lttng_ust_lfht_for_each_entry(ht, &iter, node, node) { |
bf956ec0 MD |
539 | int ret; |
540 | ||
10544ee8 | 541 | ret = lttng_ust_lfht_del(ht, lttng_ust_lfht_iter_get_node(&iter)); |
bf956ec0 MD |
542 | assert(!ret); |
543 | /* note: this hash table is never used concurrently */ | |
544 | free(node); | |
545 | nr_nodes++; | |
97b58163 | 546 | } |
bf956ec0 MD |
547 | return nr_nodes; |
548 | } | |
97b58163 | 549 | |
bf956ec0 MD |
550 | /* |
551 | * Return value: | |
53569322 | 552 | * >=0: success |
bf956ec0 MD |
553 | * <0: error |
554 | */ | |
555 | static | |
556 | int validate_instruction_context(struct bytecode_runtime *bytecode, | |
0305960f | 557 | struct vstack *stack, |
22389ecb MD |
558 | char *start_pc, |
559 | char *pc) | |
bf956ec0 MD |
560 | { |
561 | int ret = 0; | |
04aa13f8 | 562 | const bytecode_opcode_t opcode = *(bytecode_opcode_t *) pc; |
bf956ec0 | 563 | |
3151a51d | 564 | switch (opcode) { |
04aa13f8 | 565 | case BYTECODE_OP_UNKNOWN: |
bf956ec0 MD |
566 | default: |
567 | { | |
568 | ERR("unknown bytecode op %u\n", | |
04aa13f8 | 569 | (unsigned int) *(bytecode_opcode_t *) pc); |
bf956ec0 MD |
570 | ret = -EINVAL; |
571 | goto end; | |
572 | } | |
573 | ||
04aa13f8 FD |
574 | case BYTECODE_OP_RETURN: |
575 | case BYTECODE_OP_RETURN_S64: | |
bf956ec0 MD |
576 | { |
577 | goto end; | |
578 | } | |
579 | ||
580 | /* binary */ | |
04aa13f8 FD |
581 | case BYTECODE_OP_MUL: |
582 | case BYTECODE_OP_DIV: | |
583 | case BYTECODE_OP_MOD: | |
584 | case BYTECODE_OP_PLUS: | |
585 | case BYTECODE_OP_MINUS: | |
bf956ec0 MD |
586 | { |
587 | ERR("unsupported bytecode op %u\n", | |
3151a51d | 588 | (unsigned int) opcode); |
bf956ec0 MD |
589 | ret = -EINVAL; |
590 | goto end; | |
591 | } | |
97b58163 | 592 | |
04aa13f8 | 593 | case BYTECODE_OP_EQ: |
bf956ec0 | 594 | { |
3151a51d | 595 | ret = bin_op_compare_check(stack, opcode, "=="); |
53569322 | 596 | if (ret < 0) |
bf956ec0 MD |
597 | goto end; |
598 | break; | |
599 | } | |
04aa13f8 | 600 | case BYTECODE_OP_NE: |
bf956ec0 | 601 | { |
3151a51d | 602 | ret = bin_op_compare_check(stack, opcode, "!="); |
53569322 | 603 | if (ret < 0) |
bf956ec0 MD |
604 | goto end; |
605 | break; | |
606 | } | |
04aa13f8 | 607 | case BYTECODE_OP_GT: |
bf956ec0 | 608 | { |
3151a51d | 609 | ret = bin_op_compare_check(stack, opcode, ">"); |
53569322 | 610 | if (ret < 0) |
bf956ec0 MD |
611 | goto end; |
612 | break; | |
613 | } | |
04aa13f8 | 614 | case BYTECODE_OP_LT: |
bf956ec0 | 615 | { |
3151a51d | 616 | ret = bin_op_compare_check(stack, opcode, "<"); |
53569322 | 617 | if (ret < 0) |
bf956ec0 MD |
618 | goto end; |
619 | break; | |
620 | } | |
04aa13f8 | 621 | case BYTECODE_OP_GE: |
bf956ec0 | 622 | { |
3151a51d | 623 | ret = bin_op_compare_check(stack, opcode, ">="); |
53569322 | 624 | if (ret < 0) |
bf956ec0 MD |
625 | goto end; |
626 | break; | |
627 | } | |
04aa13f8 | 628 | case BYTECODE_OP_LE: |
bf956ec0 | 629 | { |
3151a51d | 630 | ret = bin_op_compare_check(stack, opcode, "<="); |
53569322 | 631 | if (ret < 0) |
97b58163 | 632 | goto end; |
bf956ec0 MD |
633 | break; |
634 | } | |
97b58163 | 635 | |
04aa13f8 FD |
636 | case BYTECODE_OP_EQ_STRING: |
637 | case BYTECODE_OP_NE_STRING: | |
638 | case BYTECODE_OP_GT_STRING: | |
639 | case BYTECODE_OP_LT_STRING: | |
640 | case BYTECODE_OP_GE_STRING: | |
641 | case BYTECODE_OP_LE_STRING: | |
bf956ec0 | 642 | { |
0305960f MD |
643 | if (!vstack_ax(stack) || !vstack_bx(stack)) { |
644 | ERR("Empty stack\n"); | |
645 | ret = -EINVAL; | |
646 | goto end; | |
647 | } | |
648 | if (vstack_ax(stack)->type != REG_STRING | |
649 | || vstack_bx(stack)->type != REG_STRING) { | |
bf956ec0 | 650 | ERR("Unexpected register type for string comparator\n"); |
97b58163 MD |
651 | ret = -EINVAL; |
652 | goto end; | |
97b58163 | 653 | } |
bf956ec0 MD |
654 | break; |
655 | } | |
97b58163 | 656 | |
04aa13f8 FD |
657 | case BYTECODE_OP_EQ_STAR_GLOB_STRING: |
658 | case BYTECODE_OP_NE_STAR_GLOB_STRING: | |
3151a51d PP |
659 | { |
660 | if (!vstack_ax(stack) || !vstack_bx(stack)) { | |
661 | ERR("Empty stack\n"); | |
662 | ret = -EINVAL; | |
663 | goto end; | |
664 | } | |
665 | if (vstack_ax(stack)->type != REG_STAR_GLOB_STRING | |
666 | && vstack_bx(stack)->type != REG_STAR_GLOB_STRING) { | |
667 | ERR("Unexpected register type for globbing pattern comparator\n"); | |
668 | ret = -EINVAL; | |
669 | goto end; | |
670 | } | |
671 | break; | |
672 | } | |
673 | ||
04aa13f8 FD |
674 | case BYTECODE_OP_EQ_S64: |
675 | case BYTECODE_OP_NE_S64: | |
676 | case BYTECODE_OP_GT_S64: | |
677 | case BYTECODE_OP_LT_S64: | |
678 | case BYTECODE_OP_GE_S64: | |
679 | case BYTECODE_OP_LE_S64: | |
bf956ec0 | 680 | { |
0305960f MD |
681 | if (!vstack_ax(stack) || !vstack_bx(stack)) { |
682 | ERR("Empty stack\n"); | |
683 | ret = -EINVAL; | |
684 | goto end; | |
685 | } | |
d97f9b78 MD |
686 | switch (vstack_ax(stack)->type) { |
687 | case REG_S64: | |
688 | case REG_U64: | |
689 | break; | |
690 | default: | |
691 | ERR("Unexpected register type for s64 comparator\n"); | |
692 | ret = -EINVAL; | |
693 | goto end; | |
694 | } | |
695 | switch (vstack_bx(stack)->type) { | |
696 | case REG_S64: | |
697 | case REG_U64: | |
698 | break; | |
699 | default: | |
bf956ec0 MD |
700 | ERR("Unexpected register type for s64 comparator\n"); |
701 | ret = -EINVAL; | |
702 | goto end; | |
97b58163 | 703 | } |
bf956ec0 MD |
704 | break; |
705 | } | |
97b58163 | 706 | |
04aa13f8 FD |
707 | case BYTECODE_OP_EQ_DOUBLE: |
708 | case BYTECODE_OP_NE_DOUBLE: | |
709 | case BYTECODE_OP_GT_DOUBLE: | |
710 | case BYTECODE_OP_LT_DOUBLE: | |
711 | case BYTECODE_OP_GE_DOUBLE: | |
712 | case BYTECODE_OP_LE_DOUBLE: | |
bf956ec0 | 713 | { |
0305960f MD |
714 | if (!vstack_ax(stack) || !vstack_bx(stack)) { |
715 | ERR("Empty stack\n"); | |
716 | ret = -EINVAL; | |
717 | goto end; | |
718 | } | |
dbea82ec MD |
719 | if (vstack_ax(stack)->type != REG_DOUBLE && vstack_bx(stack)->type != REG_DOUBLE) { |
720 | ERR("Double operator should have two double registers\n"); | |
bf956ec0 MD |
721 | ret = -EINVAL; |
722 | goto end; | |
97b58163 | 723 | } |
dbea82ec MD |
724 | break; |
725 | } | |
726 | ||
04aa13f8 FD |
727 | case BYTECODE_OP_EQ_DOUBLE_S64: |
728 | case BYTECODE_OP_NE_DOUBLE_S64: | |
729 | case BYTECODE_OP_GT_DOUBLE_S64: | |
730 | case BYTECODE_OP_LT_DOUBLE_S64: | |
731 | case BYTECODE_OP_GE_DOUBLE_S64: | |
732 | case BYTECODE_OP_LE_DOUBLE_S64: | |
dbea82ec MD |
733 | { |
734 | if (!vstack_ax(stack) || !vstack_bx(stack)) { | |
735 | ERR("Empty stack\n"); | |
736 | ret = -EINVAL; | |
737 | goto end; | |
738 | } | |
d97f9b78 MD |
739 | switch (vstack_ax(stack)->type) { |
740 | case REG_S64: | |
741 | case REG_U64: | |
742 | break; | |
743 | default: | |
744 | ERR("Double-S64 operator has unexpected register types\n"); | |
745 | ret = -EINVAL; | |
746 | goto end; | |
747 | } | |
748 | switch (vstack_bx(stack)->type) { | |
749 | case REG_DOUBLE: | |
750 | break; | |
751 | default: | |
dbea82ec MD |
752 | ERR("Double-S64 operator has unexpected register types\n"); |
753 | ret = -EINVAL; | |
754 | goto end; | |
755 | } | |
756 | break; | |
757 | } | |
758 | ||
04aa13f8 FD |
759 | case BYTECODE_OP_EQ_S64_DOUBLE: |
760 | case BYTECODE_OP_NE_S64_DOUBLE: | |
761 | case BYTECODE_OP_GT_S64_DOUBLE: | |
762 | case BYTECODE_OP_LT_S64_DOUBLE: | |
763 | case BYTECODE_OP_GE_S64_DOUBLE: | |
764 | case BYTECODE_OP_LE_S64_DOUBLE: | |
dbea82ec MD |
765 | { |
766 | if (!vstack_ax(stack) || !vstack_bx(stack)) { | |
767 | ERR("Empty stack\n"); | |
768 | ret = -EINVAL; | |
769 | goto end; | |
770 | } | |
d97f9b78 MD |
771 | switch (vstack_ax(stack)->type) { |
772 | case REG_DOUBLE: | |
773 | break; | |
774 | default: | |
775 | ERR("S64-Double operator has unexpected register types\n"); | |
776 | ret = -EINVAL; | |
777 | goto end; | |
778 | } | |
779 | switch (vstack_bx(stack)->type) { | |
780 | case REG_S64: | |
781 | case REG_U64: | |
782 | break; | |
783 | default: | |
dbea82ec | 784 | ERR("S64-Double operator has unexpected register types\n"); |
bf956ec0 MD |
785 | ret = -EINVAL; |
786 | goto end; | |
97b58163 | 787 | } |
bf956ec0 MD |
788 | break; |
789 | } | |
97b58163 | 790 | |
04aa13f8 | 791 | case BYTECODE_OP_BIT_RSHIFT: |
0039e2d8 MD |
792 | ret = bin_op_bitwise_check(stack, opcode, ">>"); |
793 | if (ret < 0) | |
794 | goto end; | |
795 | break; | |
04aa13f8 | 796 | case BYTECODE_OP_BIT_LSHIFT: |
0039e2d8 MD |
797 | ret = bin_op_bitwise_check(stack, opcode, "<<"); |
798 | if (ret < 0) | |
799 | goto end; | |
800 | break; | |
04aa13f8 | 801 | case BYTECODE_OP_BIT_AND: |
47e5f13e MD |
802 | ret = bin_op_bitwise_check(stack, opcode, "&"); |
803 | if (ret < 0) | |
804 | goto end; | |
805 | break; | |
04aa13f8 | 806 | case BYTECODE_OP_BIT_OR: |
47e5f13e MD |
807 | ret = bin_op_bitwise_check(stack, opcode, "|"); |
808 | if (ret < 0) | |
809 | goto end; | |
810 | break; | |
04aa13f8 | 811 | case BYTECODE_OP_BIT_XOR: |
47e5f13e MD |
812 | ret = bin_op_bitwise_check(stack, opcode, "^"); |
813 | if (ret < 0) | |
814 | goto end; | |
815 | break; | |
816 | ||
bf956ec0 | 817 | /* unary */ |
04aa13f8 FD |
818 | case BYTECODE_OP_UNARY_PLUS: |
819 | case BYTECODE_OP_UNARY_MINUS: | |
820 | case BYTECODE_OP_UNARY_NOT: | |
bf956ec0 | 821 | { |
0305960f MD |
822 | if (!vstack_ax(stack)) { |
823 | ERR("Empty stack\n"); | |
bf956ec0 MD |
824 | ret = -EINVAL; |
825 | goto end; | |
826 | } | |
0305960f | 827 | switch (vstack_ax(stack)->type) { |
bf956ec0 MD |
828 | default: |
829 | ERR("unknown register type\n"); | |
830 | ret = -EINVAL; | |
831 | goto end; | |
97b58163 | 832 | |
bf956ec0 | 833 | case REG_STRING: |
3151a51d | 834 | case REG_STAR_GLOB_STRING: |
bf956ec0 MD |
835 | ERR("Unary op can only be applied to numeric or floating point registers\n"); |
836 | ret = -EINVAL; | |
837 | goto end; | |
838 | case REG_S64: | |
839 | break; | |
d97f9b78 MD |
840 | case REG_U64: |
841 | break; | |
bf956ec0 | 842 | case REG_DOUBLE: |
97b58163 | 843 | break; |
53569322 MD |
844 | case REG_UNKNOWN: |
845 | break; | |
97b58163 | 846 | } |
bf956ec0 MD |
847 | break; |
848 | } | |
04aa13f8 | 849 | case BYTECODE_OP_UNARY_BIT_NOT: |
0039e2d8 MD |
850 | { |
851 | if (!vstack_ax(stack)) { | |
852 | ERR("Empty stack\n"); | |
853 | ret = -EINVAL; | |
854 | goto end; | |
855 | } | |
856 | switch (vstack_ax(stack)->type) { | |
857 | default: | |
858 | ERR("unknown register type\n"); | |
859 | ret = -EINVAL; | |
860 | goto end; | |
861 | ||
862 | case REG_STRING: | |
863 | case REG_STAR_GLOB_STRING: | |
864 | case REG_DOUBLE: | |
865 | ERR("Unary bitwise op can only be applied to numeric registers\n"); | |
866 | ret = -EINVAL; | |
867 | goto end; | |
868 | case REG_S64: | |
869 | break; | |
d97f9b78 MD |
870 | case REG_U64: |
871 | break; | |
0039e2d8 MD |
872 | case REG_UNKNOWN: |
873 | break; | |
874 | } | |
875 | break; | |
876 | } | |
97b58163 | 877 | |
04aa13f8 FD |
878 | case BYTECODE_OP_UNARY_PLUS_S64: |
879 | case BYTECODE_OP_UNARY_MINUS_S64: | |
880 | case BYTECODE_OP_UNARY_NOT_S64: | |
bf956ec0 | 881 | { |
0305960f MD |
882 | if (!vstack_ax(stack)) { |
883 | ERR("Empty stack\n"); | |
bf956ec0 MD |
884 | ret = -EINVAL; |
885 | goto end; | |
886 | } | |
d97f9b78 MD |
887 | if (vstack_ax(stack)->type != REG_S64 && |
888 | vstack_ax(stack)->type != REG_U64) { | |
bf956ec0 MD |
889 | ERR("Invalid register type\n"); |
890 | ret = -EINVAL; | |
891 | goto end; | |
97b58163 | 892 | } |
bf956ec0 MD |
893 | break; |
894 | } | |
97b58163 | 895 | |
04aa13f8 FD |
896 | case BYTECODE_OP_UNARY_PLUS_DOUBLE: |
897 | case BYTECODE_OP_UNARY_MINUS_DOUBLE: | |
898 | case BYTECODE_OP_UNARY_NOT_DOUBLE: | |
bf956ec0 | 899 | { |
0305960f MD |
900 | if (!vstack_ax(stack)) { |
901 | ERR("Empty stack\n"); | |
bf956ec0 MD |
902 | ret = -EINVAL; |
903 | goto end; | |
97b58163 | 904 | } |
0305960f | 905 | if (vstack_ax(stack)->type != REG_DOUBLE) { |
bf956ec0 MD |
906 | ERR("Invalid register type\n"); |
907 | ret = -EINVAL; | |
908 | goto end; | |
909 | } | |
910 | break; | |
911 | } | |
97b58163 | 912 | |
bf956ec0 | 913 | /* logical */ |
04aa13f8 FD |
914 | case BYTECODE_OP_AND: |
915 | case BYTECODE_OP_OR: | |
bf956ec0 MD |
916 | { |
917 | struct logical_op *insn = (struct logical_op *) pc; | |
97b58163 | 918 | |
0305960f MD |
919 | if (!vstack_ax(stack)) { |
920 | ERR("Empty stack\n"); | |
921 | ret = -EINVAL; | |
922 | goto end; | |
923 | } | |
53569322 | 924 | if (vstack_ax(stack)->type != REG_S64 |
d97f9b78 | 925 | && vstack_ax(stack)->type != REG_U64 |
53569322 | 926 | && vstack_ax(stack)->type != REG_UNKNOWN) { |
d97f9b78 | 927 | ERR("Logical comparator expects S64, U64 or dynamic register\n"); |
bf956ec0 MD |
928 | ret = -EINVAL; |
929 | goto end; | |
97b58163 MD |
930 | } |
931 | ||
bf956ec0 MD |
932 | dbg_printf("Validate jumping to bytecode offset %u\n", |
933 | (unsigned int) insn->skip_offset); | |
934 | if (unlikely(start_pc + insn->skip_offset <= pc)) { | |
935 | ERR("Loops are not allowed in bytecode\n"); | |
97b58163 MD |
936 | ret = -EINVAL; |
937 | goto end; | |
938 | } | |
bf956ec0 MD |
939 | break; |
940 | } | |
97b58163 | 941 | |
77aa5901 | 942 | /* load field ref */ |
04aa13f8 | 943 | case BYTECODE_OP_LOAD_FIELD_REF: |
bf956ec0 MD |
944 | { |
945 | ERR("Unknown field ref type\n"); | |
946 | ret = -EINVAL; | |
947 | goto end; | |
948 | } | |
04aa13f8 FD |
949 | case BYTECODE_OP_LOAD_FIELD_REF_STRING: |
950 | case BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE: | |
bf956ec0 MD |
951 | { |
952 | struct load_op *insn = (struct load_op *) pc; | |
953 | struct field_ref *ref = (struct field_ref *) insn->data; | |
954 | ||
bf956ec0 MD |
955 | dbg_printf("Validate load field ref offset %u type string\n", |
956 | ref->offset); | |
957 | break; | |
958 | } | |
04aa13f8 | 959 | case BYTECODE_OP_LOAD_FIELD_REF_S64: |
bf956ec0 MD |
960 | { |
961 | struct load_op *insn = (struct load_op *) pc; | |
962 | struct field_ref *ref = (struct field_ref *) insn->data; | |
97b58163 | 963 | |
bf956ec0 MD |
964 | dbg_printf("Validate load field ref offset %u type s64\n", |
965 | ref->offset); | |
966 | break; | |
967 | } | |
04aa13f8 | 968 | case BYTECODE_OP_LOAD_FIELD_REF_DOUBLE: |
bf956ec0 MD |
969 | { |
970 | struct load_op *insn = (struct load_op *) pc; | |
971 | struct field_ref *ref = (struct field_ref *) insn->data; | |
97b58163 | 972 | |
bf956ec0 MD |
973 | dbg_printf("Validate load field ref offset %u type double\n", |
974 | ref->offset); | |
975 | break; | |
976 | } | |
97b58163 | 977 | |
77aa5901 | 978 | /* load from immediate operand */ |
04aa13f8 FD |
979 | case BYTECODE_OP_LOAD_STRING: |
980 | case BYTECODE_OP_LOAD_STAR_GLOB_STRING: | |
bf956ec0 | 981 | { |
bf956ec0 MD |
982 | break; |
983 | } | |
97b58163 | 984 | |
04aa13f8 | 985 | case BYTECODE_OP_LOAD_S64: |
bf956ec0 | 986 | { |
bf956ec0 MD |
987 | break; |
988 | } | |
97b58163 | 989 | |
04aa13f8 | 990 | case BYTECODE_OP_LOAD_DOUBLE: |
bf956ec0 | 991 | { |
bf956ec0 MD |
992 | break; |
993 | } | |
97b58163 | 994 | |
04aa13f8 FD |
995 | case BYTECODE_OP_CAST_TO_S64: |
996 | case BYTECODE_OP_CAST_DOUBLE_TO_S64: | |
bf956ec0 MD |
997 | { |
998 | struct cast_op *insn = (struct cast_op *) pc; | |
97b58163 | 999 | |
0305960f MD |
1000 | if (!vstack_ax(stack)) { |
1001 | ERR("Empty stack\n"); | |
bf956ec0 MD |
1002 | ret = -EINVAL; |
1003 | goto end; | |
1004 | } | |
0305960f | 1005 | switch (vstack_ax(stack)->type) { |
bf956ec0 MD |
1006 | default: |
1007 | ERR("unknown register type\n"); | |
1008 | ret = -EINVAL; | |
1009 | goto end; | |
97b58163 | 1010 | |
bf956ec0 | 1011 | case REG_STRING: |
3151a51d | 1012 | case REG_STAR_GLOB_STRING: |
bf956ec0 MD |
1013 | ERR("Cast op can only be applied to numeric or floating point registers\n"); |
1014 | ret = -EINVAL; | |
1015 | goto end; | |
1016 | case REG_S64: | |
1017 | break; | |
d97f9b78 MD |
1018 | case REG_U64: |
1019 | break; | |
bf956ec0 MD |
1020 | case REG_DOUBLE: |
1021 | break; | |
53569322 MD |
1022 | case REG_UNKNOWN: |
1023 | break; | |
bf956ec0 | 1024 | } |
04aa13f8 | 1025 | if (insn->op == BYTECODE_OP_CAST_DOUBLE_TO_S64) { |
0305960f | 1026 | if (vstack_ax(stack)->type != REG_DOUBLE) { |
bf956ec0 | 1027 | ERR("Cast expects double\n"); |
97b58163 MD |
1028 | ret = -EINVAL; |
1029 | goto end; | |
97b58163 | 1030 | } |
97b58163 | 1031 | } |
bf956ec0 MD |
1032 | break; |
1033 | } | |
04aa13f8 | 1034 | case BYTECODE_OP_CAST_NOP: |
bf956ec0 MD |
1035 | { |
1036 | break; | |
1037 | } | |
1038 | ||
77aa5901 | 1039 | /* get context ref */ |
04aa13f8 | 1040 | case BYTECODE_OP_GET_CONTEXT_REF: |
77aa5901 | 1041 | { |
53569322 MD |
1042 | struct load_op *insn = (struct load_op *) pc; |
1043 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1044 | ||
1045 | dbg_printf("Validate get context ref offset %u type dynamic\n", | |
1046 | ref->offset); | |
1047 | break; | |
77aa5901 | 1048 | } |
04aa13f8 | 1049 | case BYTECODE_OP_GET_CONTEXT_REF_STRING: |
77aa5901 MD |
1050 | { |
1051 | struct load_op *insn = (struct load_op *) pc; | |
1052 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1053 | ||
1054 | dbg_printf("Validate get context ref offset %u type string\n", | |
1055 | ref->offset); | |
1056 | break; | |
1057 | } | |
04aa13f8 | 1058 | case BYTECODE_OP_GET_CONTEXT_REF_S64: |
77aa5901 MD |
1059 | { |
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 s64\n", | |
1064 | ref->offset); | |
1065 | break; | |
1066 | } | |
04aa13f8 | 1067 | case BYTECODE_OP_GET_CONTEXT_REF_DOUBLE: |
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 double\n", | |
1073 | ref->offset); | |
1074 | break; | |
1075 | } | |
1076 | ||
47e5f13e MD |
1077 | /* |
1078 | * Instructions for recursive traversal through composed types. | |
1079 | */ | |
04aa13f8 | 1080 | case BYTECODE_OP_GET_CONTEXT_ROOT: |
47e5f13e MD |
1081 | { |
1082 | dbg_printf("Validate get context root\n"); | |
1083 | break; | |
1084 | } | |
04aa13f8 | 1085 | case BYTECODE_OP_GET_APP_CONTEXT_ROOT: |
47e5f13e MD |
1086 | { |
1087 | dbg_printf("Validate get app context root\n"); | |
1088 | break; | |
1089 | } | |
04aa13f8 | 1090 | case BYTECODE_OP_GET_PAYLOAD_ROOT: |
47e5f13e MD |
1091 | { |
1092 | dbg_printf("Validate get payload root\n"); | |
1093 | break; | |
1094 | } | |
04aa13f8 | 1095 | case BYTECODE_OP_LOAD_FIELD: |
47e5f13e MD |
1096 | { |
1097 | /* | |
1098 | * We tolerate that field type is unknown at validation, | |
1099 | * because we are performing the load specialization in | |
1100 | * a phase after validation. | |
1101 | */ | |
1102 | dbg_printf("Validate load field\n"); | |
1103 | break; | |
1104 | } | |
04aa13f8 | 1105 | case BYTECODE_OP_LOAD_FIELD_S8: |
47e5f13e MD |
1106 | { |
1107 | dbg_printf("Validate load field s8\n"); | |
1108 | break; | |
1109 | } | |
04aa13f8 | 1110 | case BYTECODE_OP_LOAD_FIELD_S16: |
47e5f13e MD |
1111 | { |
1112 | dbg_printf("Validate load field s16\n"); | |
1113 | break; | |
1114 | } | |
04aa13f8 | 1115 | case BYTECODE_OP_LOAD_FIELD_S32: |
47e5f13e MD |
1116 | { |
1117 | dbg_printf("Validate load field s32\n"); | |
1118 | break; | |
1119 | } | |
04aa13f8 | 1120 | case BYTECODE_OP_LOAD_FIELD_S64: |
47e5f13e MD |
1121 | { |
1122 | dbg_printf("Validate load field s64\n"); | |
1123 | break; | |
1124 | } | |
04aa13f8 | 1125 | case BYTECODE_OP_LOAD_FIELD_U8: |
47e5f13e MD |
1126 | { |
1127 | dbg_printf("Validate load field u8\n"); | |
1128 | break; | |
1129 | } | |
04aa13f8 | 1130 | case BYTECODE_OP_LOAD_FIELD_U16: |
47e5f13e MD |
1131 | { |
1132 | dbg_printf("Validate load field u16\n"); | |
1133 | break; | |
1134 | } | |
04aa13f8 | 1135 | case BYTECODE_OP_LOAD_FIELD_U32: |
47e5f13e MD |
1136 | { |
1137 | dbg_printf("Validate load field u32\n"); | |
1138 | break; | |
1139 | } | |
04aa13f8 | 1140 | case BYTECODE_OP_LOAD_FIELD_U64: |
47e5f13e MD |
1141 | { |
1142 | dbg_printf("Validate load field u64\n"); | |
1143 | break; | |
1144 | } | |
04aa13f8 | 1145 | case BYTECODE_OP_LOAD_FIELD_STRING: |
47e5f13e MD |
1146 | { |
1147 | dbg_printf("Validate load field string\n"); | |
1148 | break; | |
1149 | } | |
04aa13f8 | 1150 | case BYTECODE_OP_LOAD_FIELD_SEQUENCE: |
47e5f13e MD |
1151 | { |
1152 | dbg_printf("Validate load field sequence\n"); | |
1153 | break; | |
1154 | } | |
04aa13f8 | 1155 | case BYTECODE_OP_LOAD_FIELD_DOUBLE: |
47e5f13e MD |
1156 | { |
1157 | dbg_printf("Validate load field double\n"); | |
1158 | break; | |
1159 | } | |
1160 | ||
04aa13f8 | 1161 | case BYTECODE_OP_GET_SYMBOL: |
47e5f13e MD |
1162 | { |
1163 | struct load_op *insn = (struct load_op *) pc; | |
1164 | struct get_symbol *sym = (struct get_symbol *) insn->data; | |
1165 | ||
1166 | dbg_printf("Validate get symbol offset %u\n", sym->offset); | |
1167 | break; | |
1168 | } | |
1169 | ||
04aa13f8 | 1170 | case BYTECODE_OP_GET_SYMBOL_FIELD: |
47e5f13e MD |
1171 | { |
1172 | struct load_op *insn = (struct load_op *) pc; | |
1173 | struct get_symbol *sym = (struct get_symbol *) insn->data; | |
1174 | ||
1175 | dbg_printf("Validate get symbol field offset %u\n", sym->offset); | |
1176 | break; | |
1177 | } | |
1178 | ||
04aa13f8 | 1179 | case BYTECODE_OP_GET_INDEX_U16: |
47e5f13e MD |
1180 | { |
1181 | struct load_op *insn = (struct load_op *) pc; | |
1182 | struct get_index_u16 *get_index = (struct get_index_u16 *) insn->data; | |
1183 | ||
1184 | dbg_printf("Validate get index u16 index %u\n", get_index->index); | |
1185 | break; | |
1186 | } | |
1187 | ||
04aa13f8 | 1188 | case BYTECODE_OP_GET_INDEX_U64: |
47e5f13e MD |
1189 | { |
1190 | struct load_op *insn = (struct load_op *) pc; | |
1191 | struct get_index_u64 *get_index = (struct get_index_u64 *) insn->data; | |
1192 | ||
1193 | dbg_printf("Validate get index u64 index %" PRIu64 "\n", get_index->index); | |
1194 | break; | |
1195 | } | |
bf956ec0 MD |
1196 | } |
1197 | end: | |
1198 | return ret; | |
1199 | } | |
1200 | ||
1201 | /* | |
1202 | * Return value: | |
1203 | * 0: success | |
1204 | * <0: error | |
1205 | */ | |
1206 | static | |
1207 | int validate_instruction_all_contexts(struct bytecode_runtime *bytecode, | |
10544ee8 | 1208 | struct lttng_ust_lfht *merge_points, |
0305960f | 1209 | struct vstack *stack, |
22389ecb MD |
1210 | char *start_pc, |
1211 | char *pc) | |
bf956ec0 MD |
1212 | { |
1213 | int ret; | |
1214 | unsigned long target_pc = pc - start_pc; | |
10544ee8 MD |
1215 | struct lttng_ust_lfht_iter iter; |
1216 | struct lttng_ust_lfht_node *node; | |
71c1ceeb | 1217 | struct lfht_mp_node *mp_node; |
bf956ec0 MD |
1218 | unsigned long hash; |
1219 | ||
1220 | /* Validate the context resulting from the previous instruction */ | |
0305960f | 1221 | ret = validate_instruction_context(bytecode, stack, start_pc, pc); |
53569322 | 1222 | if (ret < 0) |
bf956ec0 MD |
1223 | return ret; |
1224 | ||
1225 | /* Validate merge points */ | |
22389ecb | 1226 | hash = lttng_hash_mix((const char *) target_pc, sizeof(target_pc), |
bf956ec0 | 1227 | lttng_hash_seed); |
10544ee8 | 1228 | lttng_ust_lfht_lookup(merge_points, hash, lttng_hash_match, |
22389ecb | 1229 | (const char *) target_pc, &iter); |
10544ee8 | 1230 | node = lttng_ust_lfht_iter_get_node(&iter); |
71c1ceeb MD |
1231 | if (node) { |
1232 | mp_node = caa_container_of(node, struct lfht_mp_node, node); | |
3151a51d | 1233 | |
04aa13f8 | 1234 | dbg_printf("Bytecode: validate merge point at offset %lu\n", |
bf956ec0 | 1235 | target_pc); |
71c1ceeb MD |
1236 | if (merge_points_compare(stack, &mp_node->stack)) { |
1237 | ERR("Merge points differ for offset %lu\n", | |
1238 | target_pc); | |
1239 | return -EINVAL; | |
1240 | } | |
bf956ec0 | 1241 | /* Once validated, we can remove the merge point */ |
04aa13f8 | 1242 | dbg_printf("Bytecode: remove merge point at offset %lu\n", |
bf956ec0 | 1243 | target_pc); |
10544ee8 | 1244 | ret = lttng_ust_lfht_del(merge_points, node); |
bf956ec0 MD |
1245 | assert(!ret); |
1246 | } | |
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | /* | |
1251 | * Return value: | |
1252 | * >0: going to next insn. | |
1253 | * 0: success, stop iteration. | |
1254 | * <0: error | |
1255 | */ | |
1256 | static | |
1257 | int exec_insn(struct bytecode_runtime *bytecode, | |
10544ee8 | 1258 | struct lttng_ust_lfht *merge_points, |
0305960f | 1259 | struct vstack *stack, |
22389ecb MD |
1260 | char **_next_pc, |
1261 | char *pc) | |
bf956ec0 MD |
1262 | { |
1263 | int ret = 1; | |
22389ecb | 1264 | char *next_pc = *_next_pc; |
bf956ec0 | 1265 | |
04aa13f8 FD |
1266 | switch (*(bytecode_opcode_t *) pc) { |
1267 | case BYTECODE_OP_UNKNOWN: | |
bf956ec0 MD |
1268 | default: |
1269 | { | |
1270 | ERR("unknown bytecode op %u\n", | |
04aa13f8 | 1271 | (unsigned int) *(bytecode_opcode_t *) pc); |
bf956ec0 MD |
1272 | ret = -EINVAL; |
1273 | goto end; | |
1274 | } | |
1275 | ||
04aa13f8 | 1276 | case BYTECODE_OP_RETURN: |
bf956ec0 | 1277 | { |
71c1ceeb MD |
1278 | if (!vstack_ax(stack)) { |
1279 | ERR("Empty stack\n"); | |
1280 | ret = -EINVAL; | |
1281 | goto end; | |
1282 | } | |
47e5f13e MD |
1283 | switch (vstack_ax(stack)->type) { |
1284 | case REG_S64: | |
d97f9b78 | 1285 | case REG_U64: |
09f78acb FD |
1286 | case REG_DOUBLE: |
1287 | case REG_STRING: | |
1288 | case REG_PTR: | |
47e5f13e MD |
1289 | case REG_UNKNOWN: |
1290 | break; | |
1291 | default: | |
1292 | ERR("Unexpected register type %d at end of bytecode\n", | |
1293 | (int) vstack_ax(stack)->type); | |
1294 | ret = -EINVAL; | |
1295 | goto end; | |
1296 | } | |
1297 | ||
bf956ec0 MD |
1298 | ret = 0; |
1299 | goto end; | |
1300 | } | |
04aa13f8 | 1301 | case BYTECODE_OP_RETURN_S64: |
93c591bb MD |
1302 | { |
1303 | if (!vstack_ax(stack)) { | |
1304 | ERR("Empty stack\n"); | |
1305 | ret = -EINVAL; | |
1306 | goto end; | |
1307 | } | |
1308 | switch (vstack_ax(stack)->type) { | |
1309 | case REG_S64: | |
d97f9b78 | 1310 | case REG_U64: |
93c591bb MD |
1311 | break; |
1312 | default: | |
1313 | case REG_UNKNOWN: | |
1314 | ERR("Unexpected register type %d at end of bytecode\n", | |
1315 | (int) vstack_ax(stack)->type); | |
1316 | ret = -EINVAL; | |
1317 | goto end; | |
1318 | } | |
1319 | ||
1320 | ret = 0; | |
1321 | goto end; | |
1322 | } | |
bf956ec0 MD |
1323 | |
1324 | /* binary */ | |
04aa13f8 FD |
1325 | case BYTECODE_OP_MUL: |
1326 | case BYTECODE_OP_DIV: | |
1327 | case BYTECODE_OP_MOD: | |
1328 | case BYTECODE_OP_PLUS: | |
1329 | case BYTECODE_OP_MINUS: | |
bf956ec0 MD |
1330 | { |
1331 | ERR("unsupported bytecode op %u\n", | |
04aa13f8 | 1332 | (unsigned int) *(bytecode_opcode_t *) pc); |
bf956ec0 MD |
1333 | ret = -EINVAL; |
1334 | goto end; | |
1335 | } | |
1336 | ||
04aa13f8 FD |
1337 | case BYTECODE_OP_EQ: |
1338 | case BYTECODE_OP_NE: | |
1339 | case BYTECODE_OP_GT: | |
1340 | case BYTECODE_OP_LT: | |
1341 | case BYTECODE_OP_GE: | |
1342 | case BYTECODE_OP_LE: | |
1343 | case BYTECODE_OP_EQ_STRING: | |
1344 | case BYTECODE_OP_NE_STRING: | |
1345 | case BYTECODE_OP_GT_STRING: | |
1346 | case BYTECODE_OP_LT_STRING: | |
1347 | case BYTECODE_OP_GE_STRING: | |
1348 | case BYTECODE_OP_LE_STRING: | |
1349 | case BYTECODE_OP_EQ_STAR_GLOB_STRING: | |
1350 | case BYTECODE_OP_NE_STAR_GLOB_STRING: | |
1351 | case BYTECODE_OP_EQ_S64: | |
1352 | case BYTECODE_OP_NE_S64: | |
1353 | case BYTECODE_OP_GT_S64: | |
1354 | case BYTECODE_OP_LT_S64: | |
1355 | case BYTECODE_OP_GE_S64: | |
1356 | case BYTECODE_OP_LE_S64: | |
1357 | case BYTECODE_OP_EQ_DOUBLE: | |
1358 | case BYTECODE_OP_NE_DOUBLE: | |
1359 | case BYTECODE_OP_GT_DOUBLE: | |
1360 | case BYTECODE_OP_LT_DOUBLE: | |
1361 | case BYTECODE_OP_GE_DOUBLE: | |
1362 | case BYTECODE_OP_LE_DOUBLE: | |
1363 | case BYTECODE_OP_EQ_DOUBLE_S64: | |
1364 | case BYTECODE_OP_NE_DOUBLE_S64: | |
1365 | case BYTECODE_OP_GT_DOUBLE_S64: | |
1366 | case BYTECODE_OP_LT_DOUBLE_S64: | |
1367 | case BYTECODE_OP_GE_DOUBLE_S64: | |
1368 | case BYTECODE_OP_LE_DOUBLE_S64: | |
1369 | case BYTECODE_OP_EQ_S64_DOUBLE: | |
1370 | case BYTECODE_OP_NE_S64_DOUBLE: | |
1371 | case BYTECODE_OP_GT_S64_DOUBLE: | |
1372 | case BYTECODE_OP_LT_S64_DOUBLE: | |
1373 | case BYTECODE_OP_GE_S64_DOUBLE: | |
1374 | case BYTECODE_OP_LE_S64_DOUBLE: | |
d97f9b78 MD |
1375 | { |
1376 | /* Pop 2, push 1 */ | |
1377 | if (vstack_pop(stack)) { | |
1378 | ret = -EINVAL; | |
1379 | goto end; | |
1380 | } | |
1381 | if (!vstack_ax(stack)) { | |
1382 | ERR("Empty stack\n"); | |
1383 | ret = -EINVAL; | |
1384 | goto end; | |
1385 | } | |
1386 | switch (vstack_ax(stack)->type) { | |
1387 | case REG_S64: | |
1388 | case REG_U64: | |
1389 | case REG_DOUBLE: | |
1390 | case REG_STRING: | |
1391 | case REG_STAR_GLOB_STRING: | |
1392 | case REG_UNKNOWN: | |
1393 | break; | |
1394 | default: | |
1395 | ERR("Unexpected register type %d for operation\n", | |
1396 | (int) vstack_ax(stack)->type); | |
1397 | ret = -EINVAL; | |
1398 | goto end; | |
1399 | } | |
1400 | ||
1401 | vstack_ax(stack)->type = REG_S64; | |
1402 | next_pc += sizeof(struct binary_op); | |
1403 | break; | |
1404 | } | |
1405 | ||
04aa13f8 FD |
1406 | case BYTECODE_OP_BIT_RSHIFT: |
1407 | case BYTECODE_OP_BIT_LSHIFT: | |
1408 | case BYTECODE_OP_BIT_AND: | |
1409 | case BYTECODE_OP_BIT_OR: | |
1410 | case BYTECODE_OP_BIT_XOR: | |
bf956ec0 | 1411 | { |
0305960f MD |
1412 | /* Pop 2, push 1 */ |
1413 | if (vstack_pop(stack)) { | |
1414 | ret = -EINVAL; | |
1415 | goto end; | |
1416 | } | |
1417 | if (!vstack_ax(stack)) { | |
1418 | ERR("Empty stack\n"); | |
1419 | ret = -EINVAL; | |
1420 | goto end; | |
1421 | } | |
47e5f13e MD |
1422 | switch (vstack_ax(stack)->type) { |
1423 | case REG_S64: | |
d97f9b78 | 1424 | case REG_U64: |
47e5f13e MD |
1425 | case REG_DOUBLE: |
1426 | case REG_STRING: | |
1427 | case REG_STAR_GLOB_STRING: | |
1428 | case REG_UNKNOWN: | |
1429 | break; | |
1430 | default: | |
1431 | ERR("Unexpected register type %d for operation\n", | |
1432 | (int) vstack_ax(stack)->type); | |
1433 | ret = -EINVAL; | |
1434 | goto end; | |
1435 | } | |
1436 | ||
d97f9b78 | 1437 | vstack_ax(stack)->type = REG_U64; |
bf956ec0 MD |
1438 | next_pc += sizeof(struct binary_op); |
1439 | break; | |
1440 | } | |
1441 | ||
1442 | /* unary */ | |
04aa13f8 FD |
1443 | case BYTECODE_OP_UNARY_PLUS: |
1444 | case BYTECODE_OP_UNARY_MINUS: | |
53569322 MD |
1445 | { |
1446 | /* Pop 1, push 1 */ | |
1447 | if (!vstack_ax(stack)) { | |
1448 | ERR("Empty stack\n"); | |
1449 | ret = -EINVAL; | |
1450 | goto end; | |
1451 | } | |
47e5f13e MD |
1452 | switch (vstack_ax(stack)->type) { |
1453 | case REG_UNKNOWN: | |
1454 | case REG_DOUBLE: | |
1455 | case REG_S64: | |
d97f9b78 | 1456 | case REG_U64: |
47e5f13e MD |
1457 | break; |
1458 | default: | |
1459 | ERR("Unexpected register type %d for operation\n", | |
1460 | (int) vstack_ax(stack)->type); | |
1461 | ret = -EINVAL; | |
1462 | goto end; | |
1463 | } | |
53569322 MD |
1464 | vstack_ax(stack)->type = REG_UNKNOWN; |
1465 | next_pc += sizeof(struct unary_op); | |
1466 | break; | |
1467 | } | |
1468 | ||
04aa13f8 FD |
1469 | case BYTECODE_OP_UNARY_PLUS_S64: |
1470 | case BYTECODE_OP_UNARY_MINUS_S64: | |
1471 | case BYTECODE_OP_UNARY_NOT_S64: | |
47e5f13e MD |
1472 | { |
1473 | /* Pop 1, push 1 */ | |
1474 | if (!vstack_ax(stack)) { | |
1475 | ERR("Empty stack\n"); | |
1476 | ret = -EINVAL; | |
1477 | goto end; | |
1478 | } | |
1479 | switch (vstack_ax(stack)->type) { | |
1480 | case REG_S64: | |
d97f9b78 | 1481 | case REG_U64: |
47e5f13e MD |
1482 | break; |
1483 | default: | |
1484 | ERR("Unexpected register type %d for operation\n", | |
1485 | (int) vstack_ax(stack)->type); | |
1486 | ret = -EINVAL; | |
1487 | goto end; | |
1488 | } | |
1489 | ||
47e5f13e MD |
1490 | next_pc += sizeof(struct unary_op); |
1491 | break; | |
1492 | } | |
1493 | ||
04aa13f8 | 1494 | case BYTECODE_OP_UNARY_NOT: |
47e5f13e MD |
1495 | { |
1496 | /* Pop 1, push 1 */ | |
1497 | if (!vstack_ax(stack)) { | |
1498 | ERR("Empty stack\n"); | |
1499 | ret = -EINVAL; | |
1500 | goto end; | |
1501 | } | |
1502 | switch (vstack_ax(stack)->type) { | |
1503 | case REG_UNKNOWN: | |
1504 | case REG_DOUBLE: | |
1505 | case REG_S64: | |
d97f9b78 | 1506 | case REG_U64: |
47e5f13e MD |
1507 | break; |
1508 | default: | |
1509 | ERR("Unexpected register type %d for operation\n", | |
1510 | (int) vstack_ax(stack)->type); | |
1511 | ret = -EINVAL; | |
1512 | goto end; | |
1513 | } | |
1514 | ||
47e5f13e MD |
1515 | next_pc += sizeof(struct unary_op); |
1516 | break; | |
1517 | } | |
1518 | ||
04aa13f8 | 1519 | case BYTECODE_OP_UNARY_BIT_NOT: |
0039e2d8 MD |
1520 | { |
1521 | /* Pop 1, push 1 */ | |
1522 | if (!vstack_ax(stack)) { | |
1523 | ERR("Empty stack\n"); | |
1524 | ret = -EINVAL; | |
1525 | goto end; | |
1526 | } | |
1527 | switch (vstack_ax(stack)->type) { | |
1528 | case REG_UNKNOWN: | |
1529 | case REG_S64: | |
d97f9b78 | 1530 | case REG_U64: |
0039e2d8 MD |
1531 | break; |
1532 | case REG_DOUBLE: | |
1533 | default: | |
1534 | ERR("Unexpected register type %d for operation\n", | |
1535 | (int) vstack_ax(stack)->type); | |
1536 | ret = -EINVAL; | |
1537 | goto end; | |
1538 | } | |
1539 | ||
d97f9b78 | 1540 | vstack_ax(stack)->type = REG_U64; |
0039e2d8 MD |
1541 | next_pc += sizeof(struct unary_op); |
1542 | break; | |
1543 | } | |
1544 | ||
04aa13f8 | 1545 | case BYTECODE_OP_UNARY_NOT_DOUBLE: |
bf956ec0 | 1546 | { |
0305960f MD |
1547 | /* Pop 1, push 1 */ |
1548 | if (!vstack_ax(stack)) { | |
1549 | ERR("Empty stack\n"); | |
1550 | ret = -EINVAL; | |
1551 | goto end; | |
1552 | } | |
47e5f13e MD |
1553 | switch (vstack_ax(stack)->type) { |
1554 | case REG_DOUBLE: | |
1555 | break; | |
1556 | default: | |
1557 | ERR("Incorrect register type %d for operation\n", | |
1558 | (int) vstack_ax(stack)->type); | |
1559 | ret = -EINVAL; | |
1560 | goto end; | |
1561 | } | |
1562 | ||
0305960f | 1563 | vstack_ax(stack)->type = REG_S64; |
bf956ec0 MD |
1564 | next_pc += sizeof(struct unary_op); |
1565 | break; | |
1566 | } | |
1567 | ||
04aa13f8 FD |
1568 | case BYTECODE_OP_UNARY_PLUS_DOUBLE: |
1569 | case BYTECODE_OP_UNARY_MINUS_DOUBLE: | |
bf956ec0 | 1570 | { |
0305960f MD |
1571 | /* Pop 1, push 1 */ |
1572 | if (!vstack_ax(stack)) { | |
1573 | ERR("Empty stack\n"); | |
1574 | ret = -EINVAL; | |
1575 | goto end; | |
1576 | } | |
47e5f13e MD |
1577 | switch (vstack_ax(stack)->type) { |
1578 | case REG_DOUBLE: | |
1579 | break; | |
1580 | default: | |
1581 | ERR("Incorrect register type %d for operation\n", | |
1582 | (int) vstack_ax(stack)->type); | |
1583 | ret = -EINVAL; | |
1584 | goto end; | |
1585 | } | |
1586 | ||
0305960f | 1587 | vstack_ax(stack)->type = REG_DOUBLE; |
bf956ec0 MD |
1588 | next_pc += sizeof(struct unary_op); |
1589 | break; | |
1590 | } | |
1591 | ||
1592 | /* logical */ | |
04aa13f8 FD |
1593 | case BYTECODE_OP_AND: |
1594 | case BYTECODE_OP_OR: | |
bf956ec0 MD |
1595 | { |
1596 | struct logical_op *insn = (struct logical_op *) pc; | |
1597 | int merge_ret; | |
1598 | ||
1599 | /* Add merge point to table */ | |
71c1ceeb MD |
1600 | merge_ret = merge_point_add_check(merge_points, |
1601 | insn->skip_offset, stack); | |
bf956ec0 MD |
1602 | if (merge_ret) { |
1603 | ret = merge_ret; | |
1604 | goto end; | |
97b58163 | 1605 | } |
47e5f13e MD |
1606 | |
1607 | if (!vstack_ax(stack)) { | |
1608 | ERR("Empty stack\n"); | |
1609 | ret = -EINVAL; | |
1610 | goto end; | |
1611 | } | |
1612 | /* There is always a cast-to-s64 operation before a or/and op. */ | |
1613 | switch (vstack_ax(stack)->type) { | |
1614 | case REG_S64: | |
d97f9b78 | 1615 | case REG_U64: |
47e5f13e MD |
1616 | break; |
1617 | default: | |
1618 | ERR("Incorrect register type %d for operation\n", | |
1619 | (int) vstack_ax(stack)->type); | |
1620 | ret = -EINVAL; | |
1621 | goto end; | |
1622 | } | |
1623 | ||
bf956ec0 | 1624 | /* Continue to next instruction */ |
71c1ceeb MD |
1625 | /* Pop 1 when jump not taken */ |
1626 | if (vstack_pop(stack)) { | |
1627 | ret = -EINVAL; | |
1628 | goto end; | |
1629 | } | |
bf956ec0 MD |
1630 | next_pc += sizeof(struct logical_op); |
1631 | break; | |
1632 | } | |
1633 | ||
77aa5901 | 1634 | /* load field ref */ |
04aa13f8 | 1635 | case BYTECODE_OP_LOAD_FIELD_REF: |
bf956ec0 MD |
1636 | { |
1637 | ERR("Unknown field ref type\n"); | |
1638 | ret = -EINVAL; | |
1639 | goto end; | |
1640 | } | |
77aa5901 | 1641 | /* get context ref */ |
04aa13f8 | 1642 | case BYTECODE_OP_GET_CONTEXT_REF: |
77aa5901 | 1643 | { |
53569322 MD |
1644 | if (vstack_push(stack)) { |
1645 | ret = -EINVAL; | |
1646 | goto end; | |
1647 | } | |
1648 | vstack_ax(stack)->type = REG_UNKNOWN; | |
1649 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1650 | break; | |
77aa5901 | 1651 | } |
04aa13f8 FD |
1652 | case BYTECODE_OP_LOAD_FIELD_REF_STRING: |
1653 | case BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE: | |
1654 | case BYTECODE_OP_GET_CONTEXT_REF_STRING: | |
bf956ec0 | 1655 | { |
0305960f MD |
1656 | if (vstack_push(stack)) { |
1657 | ret = -EINVAL; | |
1658 | goto end; | |
1659 | } | |
1660 | vstack_ax(stack)->type = REG_STRING; | |
bf956ec0 MD |
1661 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1662 | break; | |
1663 | } | |
04aa13f8 FD |
1664 | case BYTECODE_OP_LOAD_FIELD_REF_S64: |
1665 | case BYTECODE_OP_GET_CONTEXT_REF_S64: | |
bf956ec0 | 1666 | { |
0305960f MD |
1667 | if (vstack_push(stack)) { |
1668 | ret = -EINVAL; | |
1669 | goto end; | |
1670 | } | |
1671 | vstack_ax(stack)->type = REG_S64; | |
bf956ec0 MD |
1672 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1673 | break; | |
1674 | } | |
04aa13f8 FD |
1675 | case BYTECODE_OP_LOAD_FIELD_REF_DOUBLE: |
1676 | case BYTECODE_OP_GET_CONTEXT_REF_DOUBLE: | |
bf956ec0 | 1677 | { |
0305960f MD |
1678 | if (vstack_push(stack)) { |
1679 | ret = -EINVAL; | |
1680 | goto end; | |
1681 | } | |
1682 | vstack_ax(stack)->type = REG_DOUBLE; | |
bf956ec0 MD |
1683 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1684 | break; | |
1685 | } | |
1686 | ||
77aa5901 | 1687 | /* load from immediate operand */ |
04aa13f8 | 1688 | case BYTECODE_OP_LOAD_STRING: |
bf956ec0 MD |
1689 | { |
1690 | struct load_op *insn = (struct load_op *) pc; | |
1691 | ||
0305960f MD |
1692 | if (vstack_push(stack)) { |
1693 | ret = -EINVAL; | |
1694 | goto end; | |
1695 | } | |
1696 | vstack_ax(stack)->type = REG_STRING; | |
bf956ec0 MD |
1697 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
1698 | break; | |
1699 | } | |
1700 | ||
04aa13f8 | 1701 | case BYTECODE_OP_LOAD_STAR_GLOB_STRING: |
3151a51d PP |
1702 | { |
1703 | struct load_op *insn = (struct load_op *) pc; | |
1704 | ||
1705 | if (vstack_push(stack)) { | |
1706 | ret = -EINVAL; | |
1707 | goto end; | |
1708 | } | |
1709 | vstack_ax(stack)->type = REG_STAR_GLOB_STRING; | |
1710 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1711 | break; | |
1712 | } | |
1713 | ||
04aa13f8 | 1714 | case BYTECODE_OP_LOAD_S64: |
bf956ec0 | 1715 | { |
0305960f MD |
1716 | if (vstack_push(stack)) { |
1717 | ret = -EINVAL; | |
1718 | goto end; | |
1719 | } | |
1720 | vstack_ax(stack)->type = REG_S64; | |
bf956ec0 MD |
1721 | next_pc += sizeof(struct load_op) |
1722 | + sizeof(struct literal_numeric); | |
1723 | break; | |
1724 | } | |
1725 | ||
04aa13f8 | 1726 | case BYTECODE_OP_LOAD_DOUBLE: |
bf956ec0 | 1727 | { |
0305960f MD |
1728 | if (vstack_push(stack)) { |
1729 | ret = -EINVAL; | |
1730 | goto end; | |
1731 | } | |
1732 | vstack_ax(stack)->type = REG_DOUBLE; | |
bf956ec0 MD |
1733 | next_pc += sizeof(struct load_op) |
1734 | + sizeof(struct literal_double); | |
1735 | break; | |
1736 | } | |
1737 | ||
04aa13f8 FD |
1738 | case BYTECODE_OP_CAST_TO_S64: |
1739 | case BYTECODE_OP_CAST_DOUBLE_TO_S64: | |
bf956ec0 | 1740 | { |
0305960f MD |
1741 | /* Pop 1, push 1 */ |
1742 | if (!vstack_ax(stack)) { | |
1743 | ERR("Empty stack\n"); | |
1744 | ret = -EINVAL; | |
1745 | goto end; | |
1746 | } | |
47e5f13e MD |
1747 | switch (vstack_ax(stack)->type) { |
1748 | case REG_S64: | |
d97f9b78 | 1749 | case REG_U64: |
47e5f13e MD |
1750 | case REG_DOUBLE: |
1751 | case REG_UNKNOWN: | |
1752 | break; | |
1753 | default: | |
1754 | ERR("Incorrect register type %d for cast\n", | |
1755 | (int) vstack_ax(stack)->type); | |
1756 | ret = -EINVAL; | |
1757 | goto end; | |
1758 | } | |
0305960f | 1759 | vstack_ax(stack)->type = REG_S64; |
bf956ec0 MD |
1760 | next_pc += sizeof(struct cast_op); |
1761 | break; | |
1762 | } | |
04aa13f8 | 1763 | case BYTECODE_OP_CAST_NOP: |
bf956ec0 MD |
1764 | { |
1765 | next_pc += sizeof(struct cast_op); | |
1766 | break; | |
1767 | } | |
97b58163 | 1768 | |
47e5f13e MD |
1769 | /* |
1770 | * Instructions for recursive traversal through composed types. | |
1771 | */ | |
04aa13f8 FD |
1772 | case BYTECODE_OP_GET_CONTEXT_ROOT: |
1773 | case BYTECODE_OP_GET_APP_CONTEXT_ROOT: | |
1774 | case BYTECODE_OP_GET_PAYLOAD_ROOT: | |
47e5f13e MD |
1775 | { |
1776 | if (vstack_push(stack)) { | |
1777 | ret = -EINVAL; | |
1778 | goto end; | |
1779 | } | |
1780 | vstack_ax(stack)->type = REG_PTR; | |
1781 | next_pc += sizeof(struct load_op); | |
1782 | break; | |
1783 | } | |
1784 | ||
04aa13f8 | 1785 | case BYTECODE_OP_LOAD_FIELD: |
47e5f13e MD |
1786 | { |
1787 | /* Pop 1, push 1 */ | |
1788 | if (!vstack_ax(stack)) { | |
1789 | ERR("Empty stack\n"); | |
1790 | ret = -EINVAL; | |
1791 | goto end; | |
1792 | } | |
1793 | if (vstack_ax(stack)->type != REG_PTR) { | |
1794 | ERR("Expecting pointer on top of stack\n"); | |
1795 | ret = -EINVAL; | |
1796 | goto end; | |
1797 | } | |
1798 | vstack_ax(stack)->type = REG_UNKNOWN; | |
1799 | next_pc += sizeof(struct load_op); | |
1800 | break; | |
1801 | } | |
1802 | ||
04aa13f8 FD |
1803 | case BYTECODE_OP_LOAD_FIELD_S8: |
1804 | case BYTECODE_OP_LOAD_FIELD_S16: | |
1805 | case BYTECODE_OP_LOAD_FIELD_S32: | |
1806 | case BYTECODE_OP_LOAD_FIELD_S64: | |
d97f9b78 MD |
1807 | { |
1808 | /* Pop 1, push 1 */ | |
1809 | if (!vstack_ax(stack)) { | |
1810 | ERR("Empty stack\n"); | |
1811 | ret = -EINVAL; | |
1812 | goto end; | |
1813 | } | |
1814 | if (vstack_ax(stack)->type != REG_PTR) { | |
1815 | ERR("Expecting pointer on top of stack\n"); | |
1816 | ret = -EINVAL; | |
1817 | goto end; | |
1818 | } | |
1819 | vstack_ax(stack)->type = REG_S64; | |
1820 | next_pc += sizeof(struct load_op); | |
1821 | break; | |
1822 | } | |
1823 | ||
04aa13f8 FD |
1824 | case BYTECODE_OP_LOAD_FIELD_U8: |
1825 | case BYTECODE_OP_LOAD_FIELD_U16: | |
1826 | case BYTECODE_OP_LOAD_FIELD_U32: | |
1827 | case BYTECODE_OP_LOAD_FIELD_U64: | |
47e5f13e MD |
1828 | { |
1829 | /* Pop 1, push 1 */ | |
1830 | if (!vstack_ax(stack)) { | |
1831 | ERR("Empty stack\n"); | |
1832 | ret = -EINVAL; | |
1833 | goto end; | |
1834 | } | |
1835 | if (vstack_ax(stack)->type != REG_PTR) { | |
1836 | ERR("Expecting pointer on top of stack\n"); | |
1837 | ret = -EINVAL; | |
1838 | goto end; | |
1839 | } | |
d97f9b78 | 1840 | vstack_ax(stack)->type = REG_U64; |
47e5f13e MD |
1841 | next_pc += sizeof(struct load_op); |
1842 | break; | |
1843 | } | |
1844 | ||
04aa13f8 FD |
1845 | case BYTECODE_OP_LOAD_FIELD_STRING: |
1846 | case BYTECODE_OP_LOAD_FIELD_SEQUENCE: | |
47e5f13e MD |
1847 | { |
1848 | /* Pop 1, push 1 */ | |
1849 | if (!vstack_ax(stack)) { | |
1850 | ERR("Empty stack\n"); | |
1851 | ret = -EINVAL; | |
1852 | goto end; | |
1853 | } | |
1854 | if (vstack_ax(stack)->type != REG_PTR) { | |
1855 | ERR("Expecting pointer on top of stack\n"); | |
1856 | ret = -EINVAL; | |
1857 | goto end; | |
1858 | } | |
1859 | vstack_ax(stack)->type = REG_STRING; | |
1860 | next_pc += sizeof(struct load_op); | |
1861 | break; | |
1862 | } | |
1863 | ||
04aa13f8 | 1864 | case BYTECODE_OP_LOAD_FIELD_DOUBLE: |
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_DOUBLE; | |
1878 | next_pc += sizeof(struct load_op); | |
1879 | break; | |
1880 | } | |
1881 | ||
04aa13f8 FD |
1882 | case BYTECODE_OP_GET_SYMBOL: |
1883 | case BYTECODE_OP_GET_SYMBOL_FIELD: | |
47e5f13e MD |
1884 | { |
1885 | /* Pop 1, push 1 */ | |
1886 | if (!vstack_ax(stack)) { | |
1887 | ERR("Empty stack\n"); | |
1888 | ret = -EINVAL; | |
1889 | goto end; | |
1890 | } | |
1891 | if (vstack_ax(stack)->type != REG_PTR) { | |
1892 | ERR("Expecting pointer on top of stack\n"); | |
1893 | ret = -EINVAL; | |
1894 | goto end; | |
1895 | } | |
1896 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1897 | break; | |
1898 | } | |
1899 | ||
04aa13f8 | 1900 | case BYTECODE_OP_GET_INDEX_U16: |
47e5f13e MD |
1901 | { |
1902 | /* Pop 1, push 1 */ | |
1903 | if (!vstack_ax(stack)) { | |
1904 | ERR("Empty stack\n"); | |
1905 | ret = -EINVAL; | |
1906 | goto end; | |
1907 | } | |
1908 | if (vstack_ax(stack)->type != REG_PTR) { | |
1909 | ERR("Expecting pointer on top of stack\n"); | |
1910 | ret = -EINVAL; | |
1911 | goto end; | |
1912 | } | |
1913 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); | |
1914 | break; | |
1915 | } | |
1916 | ||
04aa13f8 | 1917 | case BYTECODE_OP_GET_INDEX_U64: |
47e5f13e MD |
1918 | { |
1919 | /* Pop 1, push 1 */ | |
1920 | if (!vstack_ax(stack)) { | |
1921 | ERR("Empty stack\n"); | |
1922 | ret = -EINVAL; | |
1923 | goto end; | |
1924 | } | |
1925 | if (vstack_ax(stack)->type != REG_PTR) { | |
1926 | ERR("Expecting pointer on top of stack\n"); | |
1927 | ret = -EINVAL; | |
1928 | goto end; | |
1929 | } | |
1930 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); | |
1931 | break; | |
1932 | } | |
1933 | ||
bf956ec0 MD |
1934 | } |
1935 | end: | |
1936 | *_next_pc = next_pc; | |
1937 | return ret; | |
1938 | } | |
1939 | ||
1940 | /* | |
1941 | * Never called concurrently (hash seed is shared). | |
1942 | */ | |
04aa13f8 | 1943 | int lttng_bytecode_validate(struct bytecode_runtime *bytecode) |
bf956ec0 | 1944 | { |
10544ee8 | 1945 | struct lttng_ust_lfht *merge_points; |
22389ecb | 1946 | char *pc, *next_pc, *start_pc; |
bf956ec0 | 1947 | int ret = -EINVAL; |
0305960f | 1948 | struct vstack stack; |
bf956ec0 | 1949 | |
0305960f | 1950 | vstack_init(&stack); |
bf956ec0 MD |
1951 | |
1952 | if (!lttng_hash_seed_ready) { | |
1953 | lttng_hash_seed = time(NULL); | |
1954 | lttng_hash_seed_ready = 1; | |
1955 | } | |
1956 | /* | |
1957 | * Note: merge_points hash table used by single thread, and | |
1958 | * never concurrently resized. Therefore, we can use it without | |
1959 | * holding RCU read-side lock and free nodes without using | |
1960 | * call_rcu. | |
1961 | */ | |
10544ee8 | 1962 | merge_points = lttng_ust_lfht_new(DEFAULT_NR_MERGE_POINTS, |
bf956ec0 MD |
1963 | MIN_NR_BUCKETS, MAX_NR_BUCKETS, |
1964 | 0, NULL); | |
1965 | if (!merge_points) { | |
1966 | ERR("Error allocating hash table for bytecode validation\n"); | |
1967 | return -ENOMEM; | |
1968 | } | |
47e5f13e | 1969 | start_pc = &bytecode->code[0]; |
bf956ec0 MD |
1970 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; |
1971 | pc = next_pc) { | |
82513dbe MD |
1972 | ret = bytecode_validate_overflow(bytecode, start_pc, pc); |
1973 | if (ret != 0) { | |
1974 | if (ret == -ERANGE) | |
04aa13f8 | 1975 | ERR("Bytecode overflow\n"); |
bf956ec0 | 1976 | goto end; |
97b58163 | 1977 | } |
bf956ec0 | 1978 | dbg_printf("Validating op %s (%u)\n", |
bf617e20 | 1979 | lttng_bytecode_print_op((unsigned int) *(bytecode_opcode_t *) pc), |
04aa13f8 | 1980 | (unsigned int) *(bytecode_opcode_t *) pc); |
bf956ec0 MD |
1981 | |
1982 | /* | |
1983 | * For each instruction, validate the current context | |
1984 | * (traversal of entire execution flow), and validate | |
53569322 | 1985 | * all merge points targeting this instruction. |
bf956ec0 MD |
1986 | */ |
1987 | ret = validate_instruction_all_contexts(bytecode, merge_points, | |
0305960f | 1988 | &stack, start_pc, pc); |
bf956ec0 MD |
1989 | if (ret) |
1990 | goto end; | |
0305960f | 1991 | ret = exec_insn(bytecode, merge_points, &stack, &next_pc, pc); |
bf956ec0 MD |
1992 | if (ret <= 0) |
1993 | goto end; | |
97b58163 MD |
1994 | } |
1995 | end: | |
bf956ec0 MD |
1996 | if (delete_all_nodes(merge_points)) { |
1997 | if (!ret) { | |
1998 | ERR("Unexpected merge points\n"); | |
1999 | ret = -EINVAL; | |
2000 | } | |
2001 | } | |
10544ee8 | 2002 | if (lttng_ust_lfht_destroy(merge_points)) { |
bf956ec0 MD |
2003 | ERR("Error destroying hash table\n"); |
2004 | } | |
97b58163 MD |
2005 | return ret; |
2006 | } |