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" |
cecabda8 | 17 | #include "common/hash.h" |
b8aa6f43 | 18 | #include "common/strutils.h" |
36c52fff | 19 | #include "lib/lttng-ust/events.h" |
9d315d6d | 20 | #include "common/macros.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 | |
2208d8b5 MJ |
212 | int bin_op_bitwise_check(struct vstack *stack, |
213 | bytecode_opcode_t opcode __attribute__((unused)), | |
47e5f13e MD |
214 | const char *str) |
215 | { | |
216 | if (unlikely(!vstack_ax(stack) || !vstack_bx(stack))) | |
217 | goto error_empty; | |
218 | ||
219 | switch (vstack_ax(stack)->type) { | |
220 | default: | |
221 | goto error_type; | |
222 | ||
223 | case REG_UNKNOWN: | |
224 | goto unknown; | |
225 | case REG_S64: | |
d97f9b78 | 226 | case REG_U64: |
47e5f13e MD |
227 | switch (vstack_bx(stack)->type) { |
228 | default: | |
229 | goto error_type; | |
230 | ||
231 | case REG_UNKNOWN: | |
232 | goto unknown; | |
233 | case REG_S64: | |
d97f9b78 | 234 | case REG_U64: |
47e5f13e MD |
235 | break; |
236 | } | |
237 | break; | |
238 | } | |
239 | return 0; | |
240 | ||
241 | unknown: | |
242 | return 1; | |
243 | ||
244 | error_empty: | |
245 | ERR("empty stack for '%s' binary operator\n", str); | |
246 | return -EINVAL; | |
247 | ||
248 | error_type: | |
249 | ERR("unknown type for '%s' binary operator\n", str); | |
250 | return -EINVAL; | |
251 | } | |
252 | ||
253 | static | |
254 | int validate_get_symbol(struct bytecode_runtime *bytecode, | |
255 | const struct get_symbol *sym) | |
256 | { | |
257 | const char *str, *str_limit; | |
258 | size_t len_limit; | |
259 | ||
a2e4d05e | 260 | if (sym->offset >= bytecode->p.bc->bc.len - bytecode->p.bc->bc.reloc_offset) |
47e5f13e MD |
261 | return -EINVAL; |
262 | ||
a2e4d05e MD |
263 | str = bytecode->p.bc->bc.data + bytecode->p.bc->bc.reloc_offset + sym->offset; |
264 | str_limit = bytecode->p.bc->bc.data + bytecode->p.bc->bc.len; | |
47e5f13e MD |
265 | len_limit = str_limit - str; |
266 | if (strnlen(str, len_limit) == len_limit) | |
267 | return -EINVAL; | |
268 | return 0; | |
269 | } | |
270 | ||
97b58163 MD |
271 | /* |
272 | * Validate bytecode range overflow within the validation pass. | |
273 | * Called for each instruction encountered. | |
274 | */ | |
275 | static | |
276 | int bytecode_validate_overflow(struct bytecode_runtime *bytecode, | |
22389ecb | 277 | char *start_pc, char *pc) |
97b58163 MD |
278 | { |
279 | int ret = 0; | |
280 | ||
04aa13f8 FD |
281 | switch (*(bytecode_opcode_t *) pc) { |
282 | case BYTECODE_OP_UNKNOWN: | |
97b58163 MD |
283 | default: |
284 | { | |
285 | ERR("unknown bytecode op %u\n", | |
04aa13f8 | 286 | (unsigned int) *(bytecode_opcode_t *) pc); |
97b58163 MD |
287 | ret = -EINVAL; |
288 | break; | |
289 | } | |
290 | ||
04aa13f8 FD |
291 | case BYTECODE_OP_RETURN: |
292 | case BYTECODE_OP_RETURN_S64: | |
97b58163 MD |
293 | { |
294 | if (unlikely(pc + sizeof(struct return_op) | |
295 | > start_pc + bytecode->len)) { | |
82513dbe | 296 | ret = -ERANGE; |
97b58163 MD |
297 | } |
298 | break; | |
299 | } | |
300 | ||
301 | /* binary */ | |
04aa13f8 FD |
302 | case BYTECODE_OP_MUL: |
303 | case BYTECODE_OP_DIV: | |
304 | case BYTECODE_OP_MOD: | |
305 | case BYTECODE_OP_PLUS: | |
306 | case BYTECODE_OP_MINUS: | |
97b58163 MD |
307 | { |
308 | ERR("unsupported bytecode op %u\n", | |
04aa13f8 | 309 | (unsigned int) *(bytecode_opcode_t *) pc); |
97b58163 MD |
310 | ret = -EINVAL; |
311 | break; | |
312 | } | |
313 | ||
04aa13f8 FD |
314 | case BYTECODE_OP_EQ: |
315 | case BYTECODE_OP_NE: | |
316 | case BYTECODE_OP_GT: | |
317 | case BYTECODE_OP_LT: | |
318 | case BYTECODE_OP_GE: | |
319 | case BYTECODE_OP_LE: | |
320 | case BYTECODE_OP_EQ_STRING: | |
321 | case BYTECODE_OP_NE_STRING: | |
322 | case BYTECODE_OP_GT_STRING: | |
323 | case BYTECODE_OP_LT_STRING: | |
324 | case BYTECODE_OP_GE_STRING: | |
325 | case BYTECODE_OP_LE_STRING: | |
326 | case BYTECODE_OP_EQ_STAR_GLOB_STRING: | |
327 | case BYTECODE_OP_NE_STAR_GLOB_STRING: | |
328 | case BYTECODE_OP_EQ_S64: | |
329 | case BYTECODE_OP_NE_S64: | |
330 | case BYTECODE_OP_GT_S64: | |
331 | case BYTECODE_OP_LT_S64: | |
332 | case BYTECODE_OP_GE_S64: | |
333 | case BYTECODE_OP_LE_S64: | |
334 | case BYTECODE_OP_EQ_DOUBLE: | |
335 | case BYTECODE_OP_NE_DOUBLE: | |
336 | case BYTECODE_OP_GT_DOUBLE: | |
337 | case BYTECODE_OP_LT_DOUBLE: | |
338 | case BYTECODE_OP_GE_DOUBLE: | |
339 | case BYTECODE_OP_LE_DOUBLE: | |
340 | case BYTECODE_OP_EQ_DOUBLE_S64: | |
341 | case BYTECODE_OP_NE_DOUBLE_S64: | |
342 | case BYTECODE_OP_GT_DOUBLE_S64: | |
343 | case BYTECODE_OP_LT_DOUBLE_S64: | |
344 | case BYTECODE_OP_GE_DOUBLE_S64: | |
345 | case BYTECODE_OP_LE_DOUBLE_S64: | |
346 | case BYTECODE_OP_EQ_S64_DOUBLE: | |
347 | case BYTECODE_OP_NE_S64_DOUBLE: | |
348 | case BYTECODE_OP_GT_S64_DOUBLE: | |
349 | case BYTECODE_OP_LT_S64_DOUBLE: | |
350 | case BYTECODE_OP_GE_S64_DOUBLE: | |
351 | case BYTECODE_OP_LE_S64_DOUBLE: | |
352 | case BYTECODE_OP_BIT_RSHIFT: | |
353 | case BYTECODE_OP_BIT_LSHIFT: | |
354 | case BYTECODE_OP_BIT_AND: | |
355 | case BYTECODE_OP_BIT_OR: | |
356 | case BYTECODE_OP_BIT_XOR: | |
97b58163 MD |
357 | { |
358 | if (unlikely(pc + sizeof(struct binary_op) | |
359 | > start_pc + bytecode->len)) { | |
82513dbe | 360 | ret = -ERANGE; |
97b58163 MD |
361 | } |
362 | break; | |
363 | } | |
364 | ||
365 | /* unary */ | |
04aa13f8 FD |
366 | case BYTECODE_OP_UNARY_PLUS: |
367 | case BYTECODE_OP_UNARY_MINUS: | |
368 | case BYTECODE_OP_UNARY_NOT: | |
369 | case BYTECODE_OP_UNARY_PLUS_S64: | |
370 | case BYTECODE_OP_UNARY_MINUS_S64: | |
371 | case BYTECODE_OP_UNARY_NOT_S64: | |
372 | case BYTECODE_OP_UNARY_PLUS_DOUBLE: | |
373 | case BYTECODE_OP_UNARY_MINUS_DOUBLE: | |
374 | case BYTECODE_OP_UNARY_NOT_DOUBLE: | |
375 | case BYTECODE_OP_UNARY_BIT_NOT: | |
97b58163 MD |
376 | { |
377 | if (unlikely(pc + sizeof(struct unary_op) | |
378 | > start_pc + bytecode->len)) { | |
82513dbe | 379 | ret = -ERANGE; |
97b58163 MD |
380 | } |
381 | break; | |
382 | } | |
383 | ||
384 | /* logical */ | |
04aa13f8 FD |
385 | case BYTECODE_OP_AND: |
386 | case BYTECODE_OP_OR: | |
97b58163 MD |
387 | { |
388 | if (unlikely(pc + sizeof(struct logical_op) | |
389 | > start_pc + bytecode->len)) { | |
82513dbe | 390 | ret = -ERANGE; |
97b58163 MD |
391 | } |
392 | break; | |
393 | } | |
394 | ||
77aa5901 | 395 | /* load field ref */ |
04aa13f8 | 396 | case BYTECODE_OP_LOAD_FIELD_REF: |
97b58163 MD |
397 | { |
398 | ERR("Unknown field ref type\n"); | |
399 | ret = -EINVAL; | |
400 | break; | |
401 | } | |
47e5f13e | 402 | |
77aa5901 | 403 | /* get context ref */ |
04aa13f8 FD |
404 | case BYTECODE_OP_GET_CONTEXT_REF: |
405 | case BYTECODE_OP_LOAD_FIELD_REF_STRING: | |
406 | case BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE: | |
407 | case BYTECODE_OP_LOAD_FIELD_REF_S64: | |
408 | case BYTECODE_OP_LOAD_FIELD_REF_DOUBLE: | |
409 | case BYTECODE_OP_GET_CONTEXT_REF_STRING: | |
410 | case BYTECODE_OP_GET_CONTEXT_REF_S64: | |
411 | case BYTECODE_OP_GET_CONTEXT_REF_DOUBLE: | |
97b58163 MD |
412 | { |
413 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct field_ref) | |
414 | > start_pc + bytecode->len)) { | |
82513dbe | 415 | ret = -ERANGE; |
97b58163 MD |
416 | } |
417 | break; | |
418 | } | |
419 | ||
77aa5901 | 420 | /* load from immediate operand */ |
04aa13f8 FD |
421 | case BYTECODE_OP_LOAD_STRING: |
422 | case BYTECODE_OP_LOAD_STAR_GLOB_STRING: | |
97b58163 MD |
423 | { |
424 | struct load_op *insn = (struct load_op *) pc; | |
425 | uint32_t str_len, maxlen; | |
426 | ||
427 | if (unlikely(pc + sizeof(struct load_op) | |
428 | > start_pc + bytecode->len)) { | |
82513dbe | 429 | ret = -ERANGE; |
97b58163 MD |
430 | break; |
431 | } | |
432 | ||
433 | maxlen = start_pc + bytecode->len - pc - sizeof(struct load_op); | |
434 | str_len = strnlen(insn->data, maxlen); | |
435 | if (unlikely(str_len >= maxlen)) { | |
436 | /* Final '\0' not found within range */ | |
82513dbe | 437 | ret = -ERANGE; |
97b58163 MD |
438 | } |
439 | break; | |
440 | } | |
441 | ||
04aa13f8 | 442 | case BYTECODE_OP_LOAD_S64: |
97b58163 MD |
443 | { |
444 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct literal_numeric) | |
445 | > start_pc + bytecode->len)) { | |
82513dbe | 446 | ret = -ERANGE; |
97b58163 MD |
447 | } |
448 | break; | |
449 | } | |
450 | ||
04aa13f8 | 451 | case BYTECODE_OP_LOAD_DOUBLE: |
97b58163 MD |
452 | { |
453 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct literal_double) | |
454 | > start_pc + bytecode->len)) { | |
82513dbe | 455 | ret = -ERANGE; |
97b58163 MD |
456 | } |
457 | break; | |
458 | } | |
459 | ||
04aa13f8 FD |
460 | case BYTECODE_OP_CAST_TO_S64: |
461 | case BYTECODE_OP_CAST_DOUBLE_TO_S64: | |
462 | case BYTECODE_OP_CAST_NOP: | |
97b58163 MD |
463 | { |
464 | if (unlikely(pc + sizeof(struct cast_op) | |
465 | > start_pc + bytecode->len)) { | |
82513dbe | 466 | ret = -ERANGE; |
97b58163 MD |
467 | } |
468 | break; | |
469 | } | |
77aa5901 | 470 | |
47e5f13e MD |
471 | /* |
472 | * Instructions for recursive traversal through composed types. | |
473 | */ | |
04aa13f8 FD |
474 | case BYTECODE_OP_GET_CONTEXT_ROOT: |
475 | case BYTECODE_OP_GET_APP_CONTEXT_ROOT: | |
476 | case BYTECODE_OP_GET_PAYLOAD_ROOT: | |
477 | case BYTECODE_OP_LOAD_FIELD: | |
478 | case BYTECODE_OP_LOAD_FIELD_S8: | |
479 | case BYTECODE_OP_LOAD_FIELD_S16: | |
480 | case BYTECODE_OP_LOAD_FIELD_S32: | |
481 | case BYTECODE_OP_LOAD_FIELD_S64: | |
482 | case BYTECODE_OP_LOAD_FIELD_U8: | |
483 | case BYTECODE_OP_LOAD_FIELD_U16: | |
484 | case BYTECODE_OP_LOAD_FIELD_U32: | |
485 | case BYTECODE_OP_LOAD_FIELD_U64: | |
486 | case BYTECODE_OP_LOAD_FIELD_STRING: | |
487 | case BYTECODE_OP_LOAD_FIELD_SEQUENCE: | |
488 | case BYTECODE_OP_LOAD_FIELD_DOUBLE: | |
47e5f13e MD |
489 | if (unlikely(pc + sizeof(struct load_op) |
490 | > start_pc + bytecode->len)) { | |
491 | ret = -ERANGE; | |
492 | } | |
493 | break; | |
494 | ||
04aa13f8 | 495 | case BYTECODE_OP_GET_SYMBOL: |
47e5f13e MD |
496 | { |
497 | struct load_op *insn = (struct load_op *) pc; | |
498 | struct get_symbol *sym = (struct get_symbol *) insn->data; | |
499 | ||
500 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct get_symbol) | |
501 | > start_pc + bytecode->len)) { | |
502 | ret = -ERANGE; | |
90732639 | 503 | break; |
47e5f13e MD |
504 | } |
505 | ret = validate_get_symbol(bytecode, sym); | |
506 | break; | |
507 | } | |
508 | ||
04aa13f8 | 509 | case BYTECODE_OP_GET_SYMBOL_FIELD: |
47e5f13e MD |
510 | ERR("Unexpected get symbol field"); |
511 | ret = -EINVAL; | |
512 | break; | |
513 | ||
04aa13f8 | 514 | case BYTECODE_OP_GET_INDEX_U16: |
47e5f13e MD |
515 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct get_index_u16) |
516 | > start_pc + bytecode->len)) { | |
517 | ret = -ERANGE; | |
518 | } | |
519 | break; | |
520 | ||
04aa13f8 | 521 | case BYTECODE_OP_GET_INDEX_U64: |
47e5f13e MD |
522 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct get_index_u64) |
523 | > start_pc + bytecode->len)) { | |
524 | ret = -ERANGE; | |
525 | } | |
526 | break; | |
97b58163 MD |
527 | } |
528 | ||
529 | return ret; | |
530 | } | |
531 | ||
bf956ec0 | 532 | static |
10544ee8 | 533 | unsigned long delete_all_nodes(struct lttng_ust_lfht *ht) |
97b58163 | 534 | { |
10544ee8 | 535 | struct lttng_ust_lfht_iter iter; |
bf956ec0 MD |
536 | struct lfht_mp_node *node; |
537 | unsigned long nr_nodes = 0; | |
97b58163 | 538 | |
10544ee8 | 539 | lttng_ust_lfht_for_each_entry(ht, &iter, node, node) { |
bf956ec0 MD |
540 | int ret; |
541 | ||
10544ee8 | 542 | ret = lttng_ust_lfht_del(ht, lttng_ust_lfht_iter_get_node(&iter)); |
bf956ec0 MD |
543 | assert(!ret); |
544 | /* note: this hash table is never used concurrently */ | |
545 | free(node); | |
546 | nr_nodes++; | |
97b58163 | 547 | } |
bf956ec0 MD |
548 | return nr_nodes; |
549 | } | |
97b58163 | 550 | |
bf956ec0 MD |
551 | /* |
552 | * Return value: | |
53569322 | 553 | * >=0: success |
bf956ec0 MD |
554 | * <0: error |
555 | */ | |
556 | static | |
2208d8b5 MJ |
557 | int validate_instruction_context( |
558 | struct bytecode_runtime *bytecode __attribute__((unused)), | |
0305960f | 559 | struct vstack *stack, |
22389ecb MD |
560 | char *start_pc, |
561 | char *pc) | |
bf956ec0 MD |
562 | { |
563 | int ret = 0; | |
04aa13f8 | 564 | const bytecode_opcode_t opcode = *(bytecode_opcode_t *) pc; |
bf956ec0 | 565 | |
3151a51d | 566 | switch (opcode) { |
04aa13f8 | 567 | case BYTECODE_OP_UNKNOWN: |
bf956ec0 MD |
568 | default: |
569 | { | |
570 | ERR("unknown bytecode op %u\n", | |
04aa13f8 | 571 | (unsigned int) *(bytecode_opcode_t *) pc); |
bf956ec0 MD |
572 | ret = -EINVAL; |
573 | goto end; | |
574 | } | |
575 | ||
04aa13f8 FD |
576 | case BYTECODE_OP_RETURN: |
577 | case BYTECODE_OP_RETURN_S64: | |
bf956ec0 MD |
578 | { |
579 | goto end; | |
580 | } | |
581 | ||
582 | /* binary */ | |
04aa13f8 FD |
583 | case BYTECODE_OP_MUL: |
584 | case BYTECODE_OP_DIV: | |
585 | case BYTECODE_OP_MOD: | |
586 | case BYTECODE_OP_PLUS: | |
587 | case BYTECODE_OP_MINUS: | |
bf956ec0 MD |
588 | { |
589 | ERR("unsupported bytecode op %u\n", | |
3151a51d | 590 | (unsigned int) opcode); |
bf956ec0 MD |
591 | ret = -EINVAL; |
592 | goto end; | |
593 | } | |
97b58163 | 594 | |
04aa13f8 | 595 | case BYTECODE_OP_EQ: |
bf956ec0 | 596 | { |
3151a51d | 597 | ret = bin_op_compare_check(stack, opcode, "=="); |
53569322 | 598 | if (ret < 0) |
bf956ec0 MD |
599 | goto end; |
600 | break; | |
601 | } | |
04aa13f8 | 602 | case BYTECODE_OP_NE: |
bf956ec0 | 603 | { |
3151a51d | 604 | ret = bin_op_compare_check(stack, opcode, "!="); |
53569322 | 605 | if (ret < 0) |
bf956ec0 MD |
606 | goto end; |
607 | break; | |
608 | } | |
04aa13f8 | 609 | case BYTECODE_OP_GT: |
bf956ec0 | 610 | { |
3151a51d | 611 | ret = bin_op_compare_check(stack, opcode, ">"); |
53569322 | 612 | if (ret < 0) |
bf956ec0 MD |
613 | goto end; |
614 | break; | |
615 | } | |
04aa13f8 | 616 | case BYTECODE_OP_LT: |
bf956ec0 | 617 | { |
3151a51d | 618 | ret = bin_op_compare_check(stack, opcode, "<"); |
53569322 | 619 | if (ret < 0) |
bf956ec0 MD |
620 | goto end; |
621 | break; | |
622 | } | |
04aa13f8 | 623 | case BYTECODE_OP_GE: |
bf956ec0 | 624 | { |
3151a51d | 625 | ret = bin_op_compare_check(stack, opcode, ">="); |
53569322 | 626 | if (ret < 0) |
bf956ec0 MD |
627 | goto end; |
628 | break; | |
629 | } | |
04aa13f8 | 630 | case BYTECODE_OP_LE: |
bf956ec0 | 631 | { |
3151a51d | 632 | ret = bin_op_compare_check(stack, opcode, "<="); |
53569322 | 633 | if (ret < 0) |
97b58163 | 634 | goto end; |
bf956ec0 MD |
635 | break; |
636 | } | |
97b58163 | 637 | |
04aa13f8 FD |
638 | case BYTECODE_OP_EQ_STRING: |
639 | case BYTECODE_OP_NE_STRING: | |
640 | case BYTECODE_OP_GT_STRING: | |
641 | case BYTECODE_OP_LT_STRING: | |
642 | case BYTECODE_OP_GE_STRING: | |
643 | case BYTECODE_OP_LE_STRING: | |
bf956ec0 | 644 | { |
0305960f MD |
645 | if (!vstack_ax(stack) || !vstack_bx(stack)) { |
646 | ERR("Empty stack\n"); | |
647 | ret = -EINVAL; | |
648 | goto end; | |
649 | } | |
650 | if (vstack_ax(stack)->type != REG_STRING | |
651 | || vstack_bx(stack)->type != REG_STRING) { | |
bf956ec0 | 652 | ERR("Unexpected register type for string comparator\n"); |
97b58163 MD |
653 | ret = -EINVAL; |
654 | goto end; | |
97b58163 | 655 | } |
bf956ec0 MD |
656 | break; |
657 | } | |
97b58163 | 658 | |
04aa13f8 FD |
659 | case BYTECODE_OP_EQ_STAR_GLOB_STRING: |
660 | case BYTECODE_OP_NE_STAR_GLOB_STRING: | |
3151a51d PP |
661 | { |
662 | if (!vstack_ax(stack) || !vstack_bx(stack)) { | |
663 | ERR("Empty stack\n"); | |
664 | ret = -EINVAL; | |
665 | goto end; | |
666 | } | |
667 | if (vstack_ax(stack)->type != REG_STAR_GLOB_STRING | |
668 | && vstack_bx(stack)->type != REG_STAR_GLOB_STRING) { | |
669 | ERR("Unexpected register type for globbing pattern comparator\n"); | |
670 | ret = -EINVAL; | |
671 | goto end; | |
672 | } | |
673 | break; | |
674 | } | |
675 | ||
04aa13f8 FD |
676 | case BYTECODE_OP_EQ_S64: |
677 | case BYTECODE_OP_NE_S64: | |
678 | case BYTECODE_OP_GT_S64: | |
679 | case BYTECODE_OP_LT_S64: | |
680 | case BYTECODE_OP_GE_S64: | |
681 | case BYTECODE_OP_LE_S64: | |
bf956ec0 | 682 | { |
0305960f MD |
683 | if (!vstack_ax(stack) || !vstack_bx(stack)) { |
684 | ERR("Empty stack\n"); | |
685 | ret = -EINVAL; | |
686 | goto end; | |
687 | } | |
d97f9b78 MD |
688 | switch (vstack_ax(stack)->type) { |
689 | case REG_S64: | |
690 | case REG_U64: | |
691 | break; | |
692 | default: | |
693 | ERR("Unexpected register type for s64 comparator\n"); | |
694 | ret = -EINVAL; | |
695 | goto end; | |
696 | } | |
697 | switch (vstack_bx(stack)->type) { | |
698 | case REG_S64: | |
699 | case REG_U64: | |
700 | break; | |
701 | default: | |
bf956ec0 MD |
702 | ERR("Unexpected register type for s64 comparator\n"); |
703 | ret = -EINVAL; | |
704 | goto end; | |
97b58163 | 705 | } |
bf956ec0 MD |
706 | break; |
707 | } | |
97b58163 | 708 | |
04aa13f8 FD |
709 | case BYTECODE_OP_EQ_DOUBLE: |
710 | case BYTECODE_OP_NE_DOUBLE: | |
711 | case BYTECODE_OP_GT_DOUBLE: | |
712 | case BYTECODE_OP_LT_DOUBLE: | |
713 | case BYTECODE_OP_GE_DOUBLE: | |
714 | case BYTECODE_OP_LE_DOUBLE: | |
bf956ec0 | 715 | { |
0305960f MD |
716 | if (!vstack_ax(stack) || !vstack_bx(stack)) { |
717 | ERR("Empty stack\n"); | |
718 | ret = -EINVAL; | |
719 | goto end; | |
720 | } | |
dbea82ec MD |
721 | if (vstack_ax(stack)->type != REG_DOUBLE && vstack_bx(stack)->type != REG_DOUBLE) { |
722 | ERR("Double operator should have two double registers\n"); | |
bf956ec0 MD |
723 | ret = -EINVAL; |
724 | goto end; | |
97b58163 | 725 | } |
dbea82ec MD |
726 | break; |
727 | } | |
728 | ||
04aa13f8 FD |
729 | case BYTECODE_OP_EQ_DOUBLE_S64: |
730 | case BYTECODE_OP_NE_DOUBLE_S64: | |
731 | case BYTECODE_OP_GT_DOUBLE_S64: | |
732 | case BYTECODE_OP_LT_DOUBLE_S64: | |
733 | case BYTECODE_OP_GE_DOUBLE_S64: | |
734 | case BYTECODE_OP_LE_DOUBLE_S64: | |
dbea82ec MD |
735 | { |
736 | if (!vstack_ax(stack) || !vstack_bx(stack)) { | |
737 | ERR("Empty stack\n"); | |
738 | ret = -EINVAL; | |
739 | goto end; | |
740 | } | |
d97f9b78 MD |
741 | switch (vstack_ax(stack)->type) { |
742 | case REG_S64: | |
743 | case REG_U64: | |
744 | break; | |
745 | default: | |
746 | ERR("Double-S64 operator has unexpected register types\n"); | |
747 | ret = -EINVAL; | |
748 | goto end; | |
749 | } | |
750 | switch (vstack_bx(stack)->type) { | |
751 | case REG_DOUBLE: | |
752 | break; | |
753 | default: | |
dbea82ec MD |
754 | ERR("Double-S64 operator has unexpected register types\n"); |
755 | ret = -EINVAL; | |
756 | goto end; | |
757 | } | |
758 | break; | |
759 | } | |
760 | ||
04aa13f8 FD |
761 | case BYTECODE_OP_EQ_S64_DOUBLE: |
762 | case BYTECODE_OP_NE_S64_DOUBLE: | |
763 | case BYTECODE_OP_GT_S64_DOUBLE: | |
764 | case BYTECODE_OP_LT_S64_DOUBLE: | |
765 | case BYTECODE_OP_GE_S64_DOUBLE: | |
766 | case BYTECODE_OP_LE_S64_DOUBLE: | |
dbea82ec MD |
767 | { |
768 | if (!vstack_ax(stack) || !vstack_bx(stack)) { | |
769 | ERR("Empty stack\n"); | |
770 | ret = -EINVAL; | |
771 | goto end; | |
772 | } | |
d97f9b78 MD |
773 | switch (vstack_ax(stack)->type) { |
774 | case REG_DOUBLE: | |
775 | break; | |
776 | default: | |
777 | ERR("S64-Double operator has unexpected register types\n"); | |
778 | ret = -EINVAL; | |
779 | goto end; | |
780 | } | |
781 | switch (vstack_bx(stack)->type) { | |
782 | case REG_S64: | |
783 | case REG_U64: | |
784 | break; | |
785 | default: | |
dbea82ec | 786 | ERR("S64-Double operator has unexpected register types\n"); |
bf956ec0 MD |
787 | ret = -EINVAL; |
788 | goto end; | |
97b58163 | 789 | } |
bf956ec0 MD |
790 | break; |
791 | } | |
97b58163 | 792 | |
04aa13f8 | 793 | case BYTECODE_OP_BIT_RSHIFT: |
0039e2d8 MD |
794 | ret = bin_op_bitwise_check(stack, opcode, ">>"); |
795 | if (ret < 0) | |
796 | goto end; | |
797 | break; | |
04aa13f8 | 798 | case BYTECODE_OP_BIT_LSHIFT: |
0039e2d8 MD |
799 | ret = bin_op_bitwise_check(stack, opcode, "<<"); |
800 | if (ret < 0) | |
801 | goto end; | |
802 | break; | |
04aa13f8 | 803 | case BYTECODE_OP_BIT_AND: |
47e5f13e MD |
804 | ret = bin_op_bitwise_check(stack, opcode, "&"); |
805 | if (ret < 0) | |
806 | goto end; | |
807 | break; | |
04aa13f8 | 808 | case BYTECODE_OP_BIT_OR: |
47e5f13e MD |
809 | ret = bin_op_bitwise_check(stack, opcode, "|"); |
810 | if (ret < 0) | |
811 | goto end; | |
812 | break; | |
04aa13f8 | 813 | case BYTECODE_OP_BIT_XOR: |
47e5f13e MD |
814 | ret = bin_op_bitwise_check(stack, opcode, "^"); |
815 | if (ret < 0) | |
816 | goto end; | |
817 | break; | |
818 | ||
bf956ec0 | 819 | /* unary */ |
04aa13f8 FD |
820 | case BYTECODE_OP_UNARY_PLUS: |
821 | case BYTECODE_OP_UNARY_MINUS: | |
822 | case BYTECODE_OP_UNARY_NOT: | |
bf956ec0 | 823 | { |
0305960f MD |
824 | if (!vstack_ax(stack)) { |
825 | ERR("Empty stack\n"); | |
bf956ec0 MD |
826 | ret = -EINVAL; |
827 | goto end; | |
828 | } | |
0305960f | 829 | switch (vstack_ax(stack)->type) { |
bf956ec0 MD |
830 | default: |
831 | ERR("unknown register type\n"); | |
832 | ret = -EINVAL; | |
833 | goto end; | |
97b58163 | 834 | |
bf956ec0 | 835 | case REG_STRING: |
3151a51d | 836 | case REG_STAR_GLOB_STRING: |
bf956ec0 MD |
837 | ERR("Unary op can only be applied to numeric or floating point registers\n"); |
838 | ret = -EINVAL; | |
839 | goto end; | |
840 | case REG_S64: | |
841 | break; | |
d97f9b78 MD |
842 | case REG_U64: |
843 | break; | |
bf956ec0 | 844 | case REG_DOUBLE: |
97b58163 | 845 | break; |
53569322 MD |
846 | case REG_UNKNOWN: |
847 | break; | |
97b58163 | 848 | } |
bf956ec0 MD |
849 | break; |
850 | } | |
04aa13f8 | 851 | case BYTECODE_OP_UNARY_BIT_NOT: |
0039e2d8 MD |
852 | { |
853 | if (!vstack_ax(stack)) { | |
854 | ERR("Empty stack\n"); | |
855 | ret = -EINVAL; | |
856 | goto end; | |
857 | } | |
858 | switch (vstack_ax(stack)->type) { | |
859 | default: | |
860 | ERR("unknown register type\n"); | |
861 | ret = -EINVAL; | |
862 | goto end; | |
863 | ||
864 | case REG_STRING: | |
865 | case REG_STAR_GLOB_STRING: | |
866 | case REG_DOUBLE: | |
867 | ERR("Unary bitwise op can only be applied to numeric registers\n"); | |
868 | ret = -EINVAL; | |
869 | goto end; | |
870 | case REG_S64: | |
871 | break; | |
d97f9b78 MD |
872 | case REG_U64: |
873 | break; | |
0039e2d8 MD |
874 | case REG_UNKNOWN: |
875 | break; | |
876 | } | |
877 | break; | |
878 | } | |
97b58163 | 879 | |
04aa13f8 FD |
880 | case BYTECODE_OP_UNARY_PLUS_S64: |
881 | case BYTECODE_OP_UNARY_MINUS_S64: | |
882 | case BYTECODE_OP_UNARY_NOT_S64: | |
bf956ec0 | 883 | { |
0305960f MD |
884 | if (!vstack_ax(stack)) { |
885 | ERR("Empty stack\n"); | |
bf956ec0 MD |
886 | ret = -EINVAL; |
887 | goto end; | |
888 | } | |
d97f9b78 MD |
889 | if (vstack_ax(stack)->type != REG_S64 && |
890 | vstack_ax(stack)->type != REG_U64) { | |
bf956ec0 MD |
891 | ERR("Invalid register type\n"); |
892 | ret = -EINVAL; | |
893 | goto end; | |
97b58163 | 894 | } |
bf956ec0 MD |
895 | break; |
896 | } | |
97b58163 | 897 | |
04aa13f8 FD |
898 | case BYTECODE_OP_UNARY_PLUS_DOUBLE: |
899 | case BYTECODE_OP_UNARY_MINUS_DOUBLE: | |
900 | case BYTECODE_OP_UNARY_NOT_DOUBLE: | |
bf956ec0 | 901 | { |
0305960f MD |
902 | if (!vstack_ax(stack)) { |
903 | ERR("Empty stack\n"); | |
bf956ec0 MD |
904 | ret = -EINVAL; |
905 | goto end; | |
97b58163 | 906 | } |
0305960f | 907 | if (vstack_ax(stack)->type != REG_DOUBLE) { |
bf956ec0 MD |
908 | ERR("Invalid register type\n"); |
909 | ret = -EINVAL; | |
910 | goto end; | |
911 | } | |
912 | break; | |
913 | } | |
97b58163 | 914 | |
bf956ec0 | 915 | /* logical */ |
04aa13f8 FD |
916 | case BYTECODE_OP_AND: |
917 | case BYTECODE_OP_OR: | |
bf956ec0 MD |
918 | { |
919 | struct logical_op *insn = (struct logical_op *) pc; | |
97b58163 | 920 | |
0305960f MD |
921 | if (!vstack_ax(stack)) { |
922 | ERR("Empty stack\n"); | |
923 | ret = -EINVAL; | |
924 | goto end; | |
925 | } | |
53569322 | 926 | if (vstack_ax(stack)->type != REG_S64 |
d97f9b78 | 927 | && vstack_ax(stack)->type != REG_U64 |
53569322 | 928 | && vstack_ax(stack)->type != REG_UNKNOWN) { |
d97f9b78 | 929 | ERR("Logical comparator expects S64, U64 or dynamic register\n"); |
bf956ec0 MD |
930 | ret = -EINVAL; |
931 | goto end; | |
97b58163 MD |
932 | } |
933 | ||
bf956ec0 MD |
934 | dbg_printf("Validate jumping to bytecode offset %u\n", |
935 | (unsigned int) insn->skip_offset); | |
936 | if (unlikely(start_pc + insn->skip_offset <= pc)) { | |
937 | ERR("Loops are not allowed in bytecode\n"); | |
97b58163 MD |
938 | ret = -EINVAL; |
939 | goto end; | |
940 | } | |
bf956ec0 MD |
941 | break; |
942 | } | |
97b58163 | 943 | |
77aa5901 | 944 | /* load field ref */ |
04aa13f8 | 945 | case BYTECODE_OP_LOAD_FIELD_REF: |
bf956ec0 MD |
946 | { |
947 | ERR("Unknown field ref type\n"); | |
948 | ret = -EINVAL; | |
949 | goto end; | |
950 | } | |
04aa13f8 FD |
951 | case BYTECODE_OP_LOAD_FIELD_REF_STRING: |
952 | case BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE: | |
bf956ec0 MD |
953 | { |
954 | struct load_op *insn = (struct load_op *) pc; | |
955 | struct field_ref *ref = (struct field_ref *) insn->data; | |
956 | ||
bf956ec0 MD |
957 | dbg_printf("Validate load field ref offset %u type string\n", |
958 | ref->offset); | |
959 | break; | |
960 | } | |
04aa13f8 | 961 | case BYTECODE_OP_LOAD_FIELD_REF_S64: |
bf956ec0 MD |
962 | { |
963 | struct load_op *insn = (struct load_op *) pc; | |
964 | struct field_ref *ref = (struct field_ref *) insn->data; | |
97b58163 | 965 | |
bf956ec0 MD |
966 | dbg_printf("Validate load field ref offset %u type s64\n", |
967 | ref->offset); | |
968 | break; | |
969 | } | |
04aa13f8 | 970 | case BYTECODE_OP_LOAD_FIELD_REF_DOUBLE: |
bf956ec0 MD |
971 | { |
972 | struct load_op *insn = (struct load_op *) pc; | |
973 | struct field_ref *ref = (struct field_ref *) insn->data; | |
97b58163 | 974 | |
bf956ec0 MD |
975 | dbg_printf("Validate load field ref offset %u type double\n", |
976 | ref->offset); | |
977 | break; | |
978 | } | |
97b58163 | 979 | |
77aa5901 | 980 | /* load from immediate operand */ |
04aa13f8 FD |
981 | case BYTECODE_OP_LOAD_STRING: |
982 | case BYTECODE_OP_LOAD_STAR_GLOB_STRING: | |
bf956ec0 | 983 | { |
bf956ec0 MD |
984 | break; |
985 | } | |
97b58163 | 986 | |
04aa13f8 | 987 | case BYTECODE_OP_LOAD_S64: |
bf956ec0 | 988 | { |
bf956ec0 MD |
989 | break; |
990 | } | |
97b58163 | 991 | |
04aa13f8 | 992 | case BYTECODE_OP_LOAD_DOUBLE: |
bf956ec0 | 993 | { |
bf956ec0 MD |
994 | break; |
995 | } | |
97b58163 | 996 | |
04aa13f8 FD |
997 | case BYTECODE_OP_CAST_TO_S64: |
998 | case BYTECODE_OP_CAST_DOUBLE_TO_S64: | |
bf956ec0 MD |
999 | { |
1000 | struct cast_op *insn = (struct cast_op *) pc; | |
97b58163 | 1001 | |
0305960f MD |
1002 | if (!vstack_ax(stack)) { |
1003 | ERR("Empty stack\n"); | |
bf956ec0 MD |
1004 | ret = -EINVAL; |
1005 | goto end; | |
1006 | } | |
0305960f | 1007 | switch (vstack_ax(stack)->type) { |
bf956ec0 MD |
1008 | default: |
1009 | ERR("unknown register type\n"); | |
1010 | ret = -EINVAL; | |
1011 | goto end; | |
97b58163 | 1012 | |
bf956ec0 | 1013 | case REG_STRING: |
3151a51d | 1014 | case REG_STAR_GLOB_STRING: |
bf956ec0 MD |
1015 | ERR("Cast op can only be applied to numeric or floating point registers\n"); |
1016 | ret = -EINVAL; | |
1017 | goto end; | |
1018 | case REG_S64: | |
1019 | break; | |
d97f9b78 MD |
1020 | case REG_U64: |
1021 | break; | |
bf956ec0 MD |
1022 | case REG_DOUBLE: |
1023 | break; | |
53569322 MD |
1024 | case REG_UNKNOWN: |
1025 | break; | |
bf956ec0 | 1026 | } |
04aa13f8 | 1027 | if (insn->op == BYTECODE_OP_CAST_DOUBLE_TO_S64) { |
0305960f | 1028 | if (vstack_ax(stack)->type != REG_DOUBLE) { |
bf956ec0 | 1029 | ERR("Cast expects double\n"); |
97b58163 MD |
1030 | ret = -EINVAL; |
1031 | goto end; | |
97b58163 | 1032 | } |
97b58163 | 1033 | } |
bf956ec0 MD |
1034 | break; |
1035 | } | |
04aa13f8 | 1036 | case BYTECODE_OP_CAST_NOP: |
bf956ec0 MD |
1037 | { |
1038 | break; | |
1039 | } | |
1040 | ||
77aa5901 | 1041 | /* get context ref */ |
04aa13f8 | 1042 | case BYTECODE_OP_GET_CONTEXT_REF: |
77aa5901 | 1043 | { |
53569322 MD |
1044 | struct load_op *insn = (struct load_op *) pc; |
1045 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1046 | ||
1047 | dbg_printf("Validate get context ref offset %u type dynamic\n", | |
1048 | ref->offset); | |
1049 | break; | |
77aa5901 | 1050 | } |
04aa13f8 | 1051 | case BYTECODE_OP_GET_CONTEXT_REF_STRING: |
77aa5901 MD |
1052 | { |
1053 | struct load_op *insn = (struct load_op *) pc; | |
1054 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1055 | ||
1056 | dbg_printf("Validate get context ref offset %u type string\n", | |
1057 | ref->offset); | |
1058 | break; | |
1059 | } | |
04aa13f8 | 1060 | case BYTECODE_OP_GET_CONTEXT_REF_S64: |
77aa5901 MD |
1061 | { |
1062 | struct load_op *insn = (struct load_op *) pc; | |
1063 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1064 | ||
1065 | dbg_printf("Validate get context ref offset %u type s64\n", | |
1066 | ref->offset); | |
1067 | break; | |
1068 | } | |
04aa13f8 | 1069 | case BYTECODE_OP_GET_CONTEXT_REF_DOUBLE: |
77aa5901 MD |
1070 | { |
1071 | struct load_op *insn = (struct load_op *) pc; | |
1072 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1073 | ||
1074 | dbg_printf("Validate get context ref offset %u type double\n", | |
1075 | ref->offset); | |
1076 | break; | |
1077 | } | |
1078 | ||
47e5f13e MD |
1079 | /* |
1080 | * Instructions for recursive traversal through composed types. | |
1081 | */ | |
04aa13f8 | 1082 | case BYTECODE_OP_GET_CONTEXT_ROOT: |
47e5f13e MD |
1083 | { |
1084 | dbg_printf("Validate get context root\n"); | |
1085 | break; | |
1086 | } | |
04aa13f8 | 1087 | case BYTECODE_OP_GET_APP_CONTEXT_ROOT: |
47e5f13e MD |
1088 | { |
1089 | dbg_printf("Validate get app context root\n"); | |
1090 | break; | |
1091 | } | |
04aa13f8 | 1092 | case BYTECODE_OP_GET_PAYLOAD_ROOT: |
47e5f13e MD |
1093 | { |
1094 | dbg_printf("Validate get payload root\n"); | |
1095 | break; | |
1096 | } | |
04aa13f8 | 1097 | case BYTECODE_OP_LOAD_FIELD: |
47e5f13e MD |
1098 | { |
1099 | /* | |
1100 | * We tolerate that field type is unknown at validation, | |
1101 | * because we are performing the load specialization in | |
1102 | * a phase after validation. | |
1103 | */ | |
1104 | dbg_printf("Validate load field\n"); | |
1105 | break; | |
1106 | } | |
04aa13f8 | 1107 | case BYTECODE_OP_LOAD_FIELD_S8: |
47e5f13e MD |
1108 | { |
1109 | dbg_printf("Validate load field s8\n"); | |
1110 | break; | |
1111 | } | |
04aa13f8 | 1112 | case BYTECODE_OP_LOAD_FIELD_S16: |
47e5f13e MD |
1113 | { |
1114 | dbg_printf("Validate load field s16\n"); | |
1115 | break; | |
1116 | } | |
04aa13f8 | 1117 | case BYTECODE_OP_LOAD_FIELD_S32: |
47e5f13e MD |
1118 | { |
1119 | dbg_printf("Validate load field s32\n"); | |
1120 | break; | |
1121 | } | |
04aa13f8 | 1122 | case BYTECODE_OP_LOAD_FIELD_S64: |
47e5f13e MD |
1123 | { |
1124 | dbg_printf("Validate load field s64\n"); | |
1125 | break; | |
1126 | } | |
04aa13f8 | 1127 | case BYTECODE_OP_LOAD_FIELD_U8: |
47e5f13e MD |
1128 | { |
1129 | dbg_printf("Validate load field u8\n"); | |
1130 | break; | |
1131 | } | |
04aa13f8 | 1132 | case BYTECODE_OP_LOAD_FIELD_U16: |
47e5f13e MD |
1133 | { |
1134 | dbg_printf("Validate load field u16\n"); | |
1135 | break; | |
1136 | } | |
04aa13f8 | 1137 | case BYTECODE_OP_LOAD_FIELD_U32: |
47e5f13e MD |
1138 | { |
1139 | dbg_printf("Validate load field u32\n"); | |
1140 | break; | |
1141 | } | |
04aa13f8 | 1142 | case BYTECODE_OP_LOAD_FIELD_U64: |
47e5f13e MD |
1143 | { |
1144 | dbg_printf("Validate load field u64\n"); | |
1145 | break; | |
1146 | } | |
04aa13f8 | 1147 | case BYTECODE_OP_LOAD_FIELD_STRING: |
47e5f13e MD |
1148 | { |
1149 | dbg_printf("Validate load field string\n"); | |
1150 | break; | |
1151 | } | |
04aa13f8 | 1152 | case BYTECODE_OP_LOAD_FIELD_SEQUENCE: |
47e5f13e MD |
1153 | { |
1154 | dbg_printf("Validate load field sequence\n"); | |
1155 | break; | |
1156 | } | |
04aa13f8 | 1157 | case BYTECODE_OP_LOAD_FIELD_DOUBLE: |
47e5f13e MD |
1158 | { |
1159 | dbg_printf("Validate load field double\n"); | |
1160 | break; | |
1161 | } | |
1162 | ||
04aa13f8 | 1163 | case BYTECODE_OP_GET_SYMBOL: |
47e5f13e MD |
1164 | { |
1165 | struct load_op *insn = (struct load_op *) pc; | |
1166 | struct get_symbol *sym = (struct get_symbol *) insn->data; | |
1167 | ||
1168 | dbg_printf("Validate get symbol offset %u\n", sym->offset); | |
1169 | break; | |
1170 | } | |
1171 | ||
04aa13f8 | 1172 | case BYTECODE_OP_GET_SYMBOL_FIELD: |
47e5f13e MD |
1173 | { |
1174 | struct load_op *insn = (struct load_op *) pc; | |
1175 | struct get_symbol *sym = (struct get_symbol *) insn->data; | |
1176 | ||
1177 | dbg_printf("Validate get symbol field offset %u\n", sym->offset); | |
1178 | break; | |
1179 | } | |
1180 | ||
04aa13f8 | 1181 | case BYTECODE_OP_GET_INDEX_U16: |
47e5f13e MD |
1182 | { |
1183 | struct load_op *insn = (struct load_op *) pc; | |
1184 | struct get_index_u16 *get_index = (struct get_index_u16 *) insn->data; | |
1185 | ||
1186 | dbg_printf("Validate get index u16 index %u\n", get_index->index); | |
1187 | break; | |
1188 | } | |
1189 | ||
04aa13f8 | 1190 | case BYTECODE_OP_GET_INDEX_U64: |
47e5f13e MD |
1191 | { |
1192 | struct load_op *insn = (struct load_op *) pc; | |
1193 | struct get_index_u64 *get_index = (struct get_index_u64 *) insn->data; | |
1194 | ||
1195 | dbg_printf("Validate get index u64 index %" PRIu64 "\n", get_index->index); | |
1196 | break; | |
1197 | } | |
bf956ec0 MD |
1198 | } |
1199 | end: | |
1200 | return ret; | |
1201 | } | |
1202 | ||
1203 | /* | |
1204 | * Return value: | |
1205 | * 0: success | |
1206 | * <0: error | |
1207 | */ | |
1208 | static | |
1209 | int validate_instruction_all_contexts(struct bytecode_runtime *bytecode, | |
10544ee8 | 1210 | struct lttng_ust_lfht *merge_points, |
0305960f | 1211 | struct vstack *stack, |
22389ecb MD |
1212 | char *start_pc, |
1213 | char *pc) | |
bf956ec0 MD |
1214 | { |
1215 | int ret; | |
1216 | unsigned long target_pc = pc - start_pc; | |
10544ee8 MD |
1217 | struct lttng_ust_lfht_iter iter; |
1218 | struct lttng_ust_lfht_node *node; | |
71c1ceeb | 1219 | struct lfht_mp_node *mp_node; |
bf956ec0 MD |
1220 | unsigned long hash; |
1221 | ||
1222 | /* Validate the context resulting from the previous instruction */ | |
0305960f | 1223 | ret = validate_instruction_context(bytecode, stack, start_pc, pc); |
53569322 | 1224 | if (ret < 0) |
bf956ec0 MD |
1225 | return ret; |
1226 | ||
1227 | /* Validate merge points */ | |
22389ecb | 1228 | hash = lttng_hash_mix((const char *) target_pc, sizeof(target_pc), |
bf956ec0 | 1229 | lttng_hash_seed); |
10544ee8 | 1230 | lttng_ust_lfht_lookup(merge_points, hash, lttng_hash_match, |
22389ecb | 1231 | (const char *) target_pc, &iter); |
10544ee8 | 1232 | node = lttng_ust_lfht_iter_get_node(&iter); |
71c1ceeb MD |
1233 | if (node) { |
1234 | mp_node = caa_container_of(node, struct lfht_mp_node, node); | |
3151a51d | 1235 | |
04aa13f8 | 1236 | dbg_printf("Bytecode: validate merge point at offset %lu\n", |
bf956ec0 | 1237 | target_pc); |
71c1ceeb MD |
1238 | if (merge_points_compare(stack, &mp_node->stack)) { |
1239 | ERR("Merge points differ for offset %lu\n", | |
1240 | target_pc); | |
1241 | return -EINVAL; | |
1242 | } | |
bf956ec0 | 1243 | /* Once validated, we can remove the merge point */ |
04aa13f8 | 1244 | dbg_printf("Bytecode: remove merge point at offset %lu\n", |
bf956ec0 | 1245 | target_pc); |
10544ee8 | 1246 | ret = lttng_ust_lfht_del(merge_points, node); |
bf956ec0 MD |
1247 | assert(!ret); |
1248 | } | |
1249 | return 0; | |
1250 | } | |
1251 | ||
1252 | /* | |
1253 | * Return value: | |
1254 | * >0: going to next insn. | |
1255 | * 0: success, stop iteration. | |
1256 | * <0: error | |
1257 | */ | |
1258 | static | |
2208d8b5 | 1259 | int exec_insn(struct bytecode_runtime *bytecode __attribute__((unused)), |
10544ee8 | 1260 | struct lttng_ust_lfht *merge_points, |
0305960f | 1261 | struct vstack *stack, |
22389ecb MD |
1262 | char **_next_pc, |
1263 | char *pc) | |
bf956ec0 MD |
1264 | { |
1265 | int ret = 1; | |
22389ecb | 1266 | char *next_pc = *_next_pc; |
bf956ec0 | 1267 | |
04aa13f8 FD |
1268 | switch (*(bytecode_opcode_t *) pc) { |
1269 | case BYTECODE_OP_UNKNOWN: | |
bf956ec0 MD |
1270 | default: |
1271 | { | |
1272 | ERR("unknown bytecode op %u\n", | |
04aa13f8 | 1273 | (unsigned int) *(bytecode_opcode_t *) pc); |
bf956ec0 MD |
1274 | ret = -EINVAL; |
1275 | goto end; | |
1276 | } | |
1277 | ||
04aa13f8 | 1278 | case BYTECODE_OP_RETURN: |
bf956ec0 | 1279 | { |
71c1ceeb MD |
1280 | if (!vstack_ax(stack)) { |
1281 | ERR("Empty stack\n"); | |
1282 | ret = -EINVAL; | |
1283 | goto end; | |
1284 | } | |
47e5f13e MD |
1285 | switch (vstack_ax(stack)->type) { |
1286 | case REG_S64: | |
d97f9b78 | 1287 | case REG_U64: |
09f78acb FD |
1288 | case REG_DOUBLE: |
1289 | case REG_STRING: | |
1290 | case REG_PTR: | |
47e5f13e MD |
1291 | case REG_UNKNOWN: |
1292 | break; | |
1293 | default: | |
1294 | ERR("Unexpected register type %d at end of bytecode\n", | |
1295 | (int) vstack_ax(stack)->type); | |
1296 | ret = -EINVAL; | |
1297 | goto end; | |
1298 | } | |
1299 | ||
bf956ec0 MD |
1300 | ret = 0; |
1301 | goto end; | |
1302 | } | |
04aa13f8 | 1303 | case BYTECODE_OP_RETURN_S64: |
93c591bb MD |
1304 | { |
1305 | if (!vstack_ax(stack)) { | |
1306 | ERR("Empty stack\n"); | |
1307 | ret = -EINVAL; | |
1308 | goto end; | |
1309 | } | |
1310 | switch (vstack_ax(stack)->type) { | |
1311 | case REG_S64: | |
d97f9b78 | 1312 | case REG_U64: |
93c591bb MD |
1313 | break; |
1314 | default: | |
1315 | case REG_UNKNOWN: | |
1316 | ERR("Unexpected register type %d at end of bytecode\n", | |
1317 | (int) vstack_ax(stack)->type); | |
1318 | ret = -EINVAL; | |
1319 | goto end; | |
1320 | } | |
1321 | ||
1322 | ret = 0; | |
1323 | goto end; | |
1324 | } | |
bf956ec0 MD |
1325 | |
1326 | /* binary */ | |
04aa13f8 FD |
1327 | case BYTECODE_OP_MUL: |
1328 | case BYTECODE_OP_DIV: | |
1329 | case BYTECODE_OP_MOD: | |
1330 | case BYTECODE_OP_PLUS: | |
1331 | case BYTECODE_OP_MINUS: | |
bf956ec0 MD |
1332 | { |
1333 | ERR("unsupported bytecode op %u\n", | |
04aa13f8 | 1334 | (unsigned int) *(bytecode_opcode_t *) pc); |
bf956ec0 MD |
1335 | ret = -EINVAL; |
1336 | goto end; | |
1337 | } | |
1338 | ||
04aa13f8 FD |
1339 | case BYTECODE_OP_EQ: |
1340 | case BYTECODE_OP_NE: | |
1341 | case BYTECODE_OP_GT: | |
1342 | case BYTECODE_OP_LT: | |
1343 | case BYTECODE_OP_GE: | |
1344 | case BYTECODE_OP_LE: | |
1345 | case BYTECODE_OP_EQ_STRING: | |
1346 | case BYTECODE_OP_NE_STRING: | |
1347 | case BYTECODE_OP_GT_STRING: | |
1348 | case BYTECODE_OP_LT_STRING: | |
1349 | case BYTECODE_OP_GE_STRING: | |
1350 | case BYTECODE_OP_LE_STRING: | |
1351 | case BYTECODE_OP_EQ_STAR_GLOB_STRING: | |
1352 | case BYTECODE_OP_NE_STAR_GLOB_STRING: | |
1353 | case BYTECODE_OP_EQ_S64: | |
1354 | case BYTECODE_OP_NE_S64: | |
1355 | case BYTECODE_OP_GT_S64: | |
1356 | case BYTECODE_OP_LT_S64: | |
1357 | case BYTECODE_OP_GE_S64: | |
1358 | case BYTECODE_OP_LE_S64: | |
1359 | case BYTECODE_OP_EQ_DOUBLE: | |
1360 | case BYTECODE_OP_NE_DOUBLE: | |
1361 | case BYTECODE_OP_GT_DOUBLE: | |
1362 | case BYTECODE_OP_LT_DOUBLE: | |
1363 | case BYTECODE_OP_GE_DOUBLE: | |
1364 | case BYTECODE_OP_LE_DOUBLE: | |
1365 | case BYTECODE_OP_EQ_DOUBLE_S64: | |
1366 | case BYTECODE_OP_NE_DOUBLE_S64: | |
1367 | case BYTECODE_OP_GT_DOUBLE_S64: | |
1368 | case BYTECODE_OP_LT_DOUBLE_S64: | |
1369 | case BYTECODE_OP_GE_DOUBLE_S64: | |
1370 | case BYTECODE_OP_LE_DOUBLE_S64: | |
1371 | case BYTECODE_OP_EQ_S64_DOUBLE: | |
1372 | case BYTECODE_OP_NE_S64_DOUBLE: | |
1373 | case BYTECODE_OP_GT_S64_DOUBLE: | |
1374 | case BYTECODE_OP_LT_S64_DOUBLE: | |
1375 | case BYTECODE_OP_GE_S64_DOUBLE: | |
1376 | case BYTECODE_OP_LE_S64_DOUBLE: | |
d97f9b78 MD |
1377 | { |
1378 | /* Pop 2, push 1 */ | |
1379 | if (vstack_pop(stack)) { | |
1380 | ret = -EINVAL; | |
1381 | goto end; | |
1382 | } | |
1383 | if (!vstack_ax(stack)) { | |
1384 | ERR("Empty stack\n"); | |
1385 | ret = -EINVAL; | |
1386 | goto end; | |
1387 | } | |
1388 | switch (vstack_ax(stack)->type) { | |
1389 | case REG_S64: | |
1390 | case REG_U64: | |
1391 | case REG_DOUBLE: | |
1392 | case REG_STRING: | |
1393 | case REG_STAR_GLOB_STRING: | |
1394 | case REG_UNKNOWN: | |
1395 | break; | |
1396 | default: | |
1397 | ERR("Unexpected register type %d for operation\n", | |
1398 | (int) vstack_ax(stack)->type); | |
1399 | ret = -EINVAL; | |
1400 | goto end; | |
1401 | } | |
1402 | ||
1403 | vstack_ax(stack)->type = REG_S64; | |
1404 | next_pc += sizeof(struct binary_op); | |
1405 | break; | |
1406 | } | |
1407 | ||
04aa13f8 FD |
1408 | case BYTECODE_OP_BIT_RSHIFT: |
1409 | case BYTECODE_OP_BIT_LSHIFT: | |
1410 | case BYTECODE_OP_BIT_AND: | |
1411 | case BYTECODE_OP_BIT_OR: | |
1412 | case BYTECODE_OP_BIT_XOR: | |
bf956ec0 | 1413 | { |
0305960f MD |
1414 | /* Pop 2, push 1 */ |
1415 | if (vstack_pop(stack)) { | |
1416 | ret = -EINVAL; | |
1417 | goto end; | |
1418 | } | |
1419 | if (!vstack_ax(stack)) { | |
1420 | ERR("Empty stack\n"); | |
1421 | ret = -EINVAL; | |
1422 | goto end; | |
1423 | } | |
47e5f13e MD |
1424 | switch (vstack_ax(stack)->type) { |
1425 | case REG_S64: | |
d97f9b78 | 1426 | case REG_U64: |
47e5f13e MD |
1427 | case REG_DOUBLE: |
1428 | case REG_STRING: | |
1429 | case REG_STAR_GLOB_STRING: | |
1430 | case REG_UNKNOWN: | |
1431 | break; | |
1432 | default: | |
1433 | ERR("Unexpected register type %d for operation\n", | |
1434 | (int) vstack_ax(stack)->type); | |
1435 | ret = -EINVAL; | |
1436 | goto end; | |
1437 | } | |
1438 | ||
d97f9b78 | 1439 | vstack_ax(stack)->type = REG_U64; |
bf956ec0 MD |
1440 | next_pc += sizeof(struct binary_op); |
1441 | break; | |
1442 | } | |
1443 | ||
1444 | /* unary */ | |
04aa13f8 FD |
1445 | case BYTECODE_OP_UNARY_PLUS: |
1446 | case BYTECODE_OP_UNARY_MINUS: | |
53569322 MD |
1447 | { |
1448 | /* Pop 1, push 1 */ | |
1449 | if (!vstack_ax(stack)) { | |
1450 | ERR("Empty stack\n"); | |
1451 | ret = -EINVAL; | |
1452 | goto end; | |
1453 | } | |
47e5f13e MD |
1454 | switch (vstack_ax(stack)->type) { |
1455 | case REG_UNKNOWN: | |
1456 | case REG_DOUBLE: | |
1457 | case REG_S64: | |
d97f9b78 | 1458 | case REG_U64: |
47e5f13e MD |
1459 | break; |
1460 | default: | |
1461 | ERR("Unexpected register type %d for operation\n", | |
1462 | (int) vstack_ax(stack)->type); | |
1463 | ret = -EINVAL; | |
1464 | goto end; | |
1465 | } | |
53569322 MD |
1466 | vstack_ax(stack)->type = REG_UNKNOWN; |
1467 | next_pc += sizeof(struct unary_op); | |
1468 | break; | |
1469 | } | |
1470 | ||
04aa13f8 FD |
1471 | case BYTECODE_OP_UNARY_PLUS_S64: |
1472 | case BYTECODE_OP_UNARY_MINUS_S64: | |
1473 | case BYTECODE_OP_UNARY_NOT_S64: | |
47e5f13e MD |
1474 | { |
1475 | /* Pop 1, push 1 */ | |
1476 | if (!vstack_ax(stack)) { | |
1477 | ERR("Empty stack\n"); | |
1478 | ret = -EINVAL; | |
1479 | goto end; | |
1480 | } | |
1481 | switch (vstack_ax(stack)->type) { | |
1482 | case REG_S64: | |
d97f9b78 | 1483 | case REG_U64: |
47e5f13e MD |
1484 | break; |
1485 | default: | |
1486 | ERR("Unexpected register type %d for operation\n", | |
1487 | (int) vstack_ax(stack)->type); | |
1488 | ret = -EINVAL; | |
1489 | goto end; | |
1490 | } | |
1491 | ||
47e5f13e MD |
1492 | next_pc += sizeof(struct unary_op); |
1493 | break; | |
1494 | } | |
1495 | ||
04aa13f8 | 1496 | case BYTECODE_OP_UNARY_NOT: |
47e5f13e MD |
1497 | { |
1498 | /* Pop 1, push 1 */ | |
1499 | if (!vstack_ax(stack)) { | |
1500 | ERR("Empty stack\n"); | |
1501 | ret = -EINVAL; | |
1502 | goto end; | |
1503 | } | |
1504 | switch (vstack_ax(stack)->type) { | |
1505 | case REG_UNKNOWN: | |
1506 | case REG_DOUBLE: | |
1507 | case REG_S64: | |
d97f9b78 | 1508 | case REG_U64: |
47e5f13e MD |
1509 | break; |
1510 | default: | |
1511 | ERR("Unexpected register type %d for operation\n", | |
1512 | (int) vstack_ax(stack)->type); | |
1513 | ret = -EINVAL; | |
1514 | goto end; | |
1515 | } | |
1516 | ||
47e5f13e MD |
1517 | next_pc += sizeof(struct unary_op); |
1518 | break; | |
1519 | } | |
1520 | ||
04aa13f8 | 1521 | case BYTECODE_OP_UNARY_BIT_NOT: |
0039e2d8 MD |
1522 | { |
1523 | /* Pop 1, push 1 */ | |
1524 | if (!vstack_ax(stack)) { | |
1525 | ERR("Empty stack\n"); | |
1526 | ret = -EINVAL; | |
1527 | goto end; | |
1528 | } | |
1529 | switch (vstack_ax(stack)->type) { | |
1530 | case REG_UNKNOWN: | |
1531 | case REG_S64: | |
d97f9b78 | 1532 | case REG_U64: |
0039e2d8 MD |
1533 | break; |
1534 | case REG_DOUBLE: | |
1535 | default: | |
1536 | ERR("Unexpected register type %d for operation\n", | |
1537 | (int) vstack_ax(stack)->type); | |
1538 | ret = -EINVAL; | |
1539 | goto end; | |
1540 | } | |
1541 | ||
d97f9b78 | 1542 | vstack_ax(stack)->type = REG_U64; |
0039e2d8 MD |
1543 | next_pc += sizeof(struct unary_op); |
1544 | break; | |
1545 | } | |
1546 | ||
04aa13f8 | 1547 | case BYTECODE_OP_UNARY_NOT_DOUBLE: |
bf956ec0 | 1548 | { |
0305960f MD |
1549 | /* Pop 1, push 1 */ |
1550 | if (!vstack_ax(stack)) { | |
1551 | ERR("Empty stack\n"); | |
1552 | ret = -EINVAL; | |
1553 | goto end; | |
1554 | } | |
47e5f13e MD |
1555 | switch (vstack_ax(stack)->type) { |
1556 | case REG_DOUBLE: | |
1557 | break; | |
1558 | default: | |
1559 | ERR("Incorrect register type %d for operation\n", | |
1560 | (int) vstack_ax(stack)->type); | |
1561 | ret = -EINVAL; | |
1562 | goto end; | |
1563 | } | |
1564 | ||
0305960f | 1565 | vstack_ax(stack)->type = REG_S64; |
bf956ec0 MD |
1566 | next_pc += sizeof(struct unary_op); |
1567 | break; | |
1568 | } | |
1569 | ||
04aa13f8 FD |
1570 | case BYTECODE_OP_UNARY_PLUS_DOUBLE: |
1571 | case BYTECODE_OP_UNARY_MINUS_DOUBLE: | |
bf956ec0 | 1572 | { |
0305960f MD |
1573 | /* Pop 1, push 1 */ |
1574 | if (!vstack_ax(stack)) { | |
1575 | ERR("Empty stack\n"); | |
1576 | ret = -EINVAL; | |
1577 | goto end; | |
1578 | } | |
47e5f13e MD |
1579 | switch (vstack_ax(stack)->type) { |
1580 | case REG_DOUBLE: | |
1581 | break; | |
1582 | default: | |
1583 | ERR("Incorrect register type %d for operation\n", | |
1584 | (int) vstack_ax(stack)->type); | |
1585 | ret = -EINVAL; | |
1586 | goto end; | |
1587 | } | |
1588 | ||
0305960f | 1589 | vstack_ax(stack)->type = REG_DOUBLE; |
bf956ec0 MD |
1590 | next_pc += sizeof(struct unary_op); |
1591 | break; | |
1592 | } | |
1593 | ||
1594 | /* logical */ | |
04aa13f8 FD |
1595 | case BYTECODE_OP_AND: |
1596 | case BYTECODE_OP_OR: | |
bf956ec0 MD |
1597 | { |
1598 | struct logical_op *insn = (struct logical_op *) pc; | |
1599 | int merge_ret; | |
1600 | ||
1601 | /* Add merge point to table */ | |
71c1ceeb MD |
1602 | merge_ret = merge_point_add_check(merge_points, |
1603 | insn->skip_offset, stack); | |
bf956ec0 MD |
1604 | if (merge_ret) { |
1605 | ret = merge_ret; | |
1606 | goto end; | |
97b58163 | 1607 | } |
47e5f13e MD |
1608 | |
1609 | if (!vstack_ax(stack)) { | |
1610 | ERR("Empty stack\n"); | |
1611 | ret = -EINVAL; | |
1612 | goto end; | |
1613 | } | |
1614 | /* There is always a cast-to-s64 operation before a or/and op. */ | |
1615 | switch (vstack_ax(stack)->type) { | |
1616 | case REG_S64: | |
d97f9b78 | 1617 | case REG_U64: |
47e5f13e MD |
1618 | break; |
1619 | default: | |
1620 | ERR("Incorrect register type %d for operation\n", | |
1621 | (int) vstack_ax(stack)->type); | |
1622 | ret = -EINVAL; | |
1623 | goto end; | |
1624 | } | |
1625 | ||
bf956ec0 | 1626 | /* Continue to next instruction */ |
71c1ceeb MD |
1627 | /* Pop 1 when jump not taken */ |
1628 | if (vstack_pop(stack)) { | |
1629 | ret = -EINVAL; | |
1630 | goto end; | |
1631 | } | |
bf956ec0 MD |
1632 | next_pc += sizeof(struct logical_op); |
1633 | break; | |
1634 | } | |
1635 | ||
77aa5901 | 1636 | /* load field ref */ |
04aa13f8 | 1637 | case BYTECODE_OP_LOAD_FIELD_REF: |
bf956ec0 MD |
1638 | { |
1639 | ERR("Unknown field ref type\n"); | |
1640 | ret = -EINVAL; | |
1641 | goto end; | |
1642 | } | |
77aa5901 | 1643 | /* get context ref */ |
04aa13f8 | 1644 | case BYTECODE_OP_GET_CONTEXT_REF: |
77aa5901 | 1645 | { |
53569322 MD |
1646 | if (vstack_push(stack)) { |
1647 | ret = -EINVAL; | |
1648 | goto end; | |
1649 | } | |
1650 | vstack_ax(stack)->type = REG_UNKNOWN; | |
1651 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1652 | break; | |
77aa5901 | 1653 | } |
04aa13f8 FD |
1654 | case BYTECODE_OP_LOAD_FIELD_REF_STRING: |
1655 | case BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE: | |
1656 | case BYTECODE_OP_GET_CONTEXT_REF_STRING: | |
bf956ec0 | 1657 | { |
0305960f MD |
1658 | if (vstack_push(stack)) { |
1659 | ret = -EINVAL; | |
1660 | goto end; | |
1661 | } | |
1662 | vstack_ax(stack)->type = REG_STRING; | |
bf956ec0 MD |
1663 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1664 | break; | |
1665 | } | |
04aa13f8 FD |
1666 | case BYTECODE_OP_LOAD_FIELD_REF_S64: |
1667 | case BYTECODE_OP_GET_CONTEXT_REF_S64: | |
bf956ec0 | 1668 | { |
0305960f MD |
1669 | if (vstack_push(stack)) { |
1670 | ret = -EINVAL; | |
1671 | goto end; | |
1672 | } | |
1673 | vstack_ax(stack)->type = REG_S64; | |
bf956ec0 MD |
1674 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1675 | break; | |
1676 | } | |
04aa13f8 FD |
1677 | case BYTECODE_OP_LOAD_FIELD_REF_DOUBLE: |
1678 | case BYTECODE_OP_GET_CONTEXT_REF_DOUBLE: | |
bf956ec0 | 1679 | { |
0305960f MD |
1680 | if (vstack_push(stack)) { |
1681 | ret = -EINVAL; | |
1682 | goto end; | |
1683 | } | |
1684 | vstack_ax(stack)->type = REG_DOUBLE; | |
bf956ec0 MD |
1685 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1686 | break; | |
1687 | } | |
1688 | ||
77aa5901 | 1689 | /* load from immediate operand */ |
04aa13f8 | 1690 | case BYTECODE_OP_LOAD_STRING: |
bf956ec0 MD |
1691 | { |
1692 | struct load_op *insn = (struct load_op *) pc; | |
1693 | ||
0305960f MD |
1694 | if (vstack_push(stack)) { |
1695 | ret = -EINVAL; | |
1696 | goto end; | |
1697 | } | |
1698 | vstack_ax(stack)->type = REG_STRING; | |
bf956ec0 MD |
1699 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
1700 | break; | |
1701 | } | |
1702 | ||
04aa13f8 | 1703 | case BYTECODE_OP_LOAD_STAR_GLOB_STRING: |
3151a51d PP |
1704 | { |
1705 | struct load_op *insn = (struct load_op *) pc; | |
1706 | ||
1707 | if (vstack_push(stack)) { | |
1708 | ret = -EINVAL; | |
1709 | goto end; | |
1710 | } | |
1711 | vstack_ax(stack)->type = REG_STAR_GLOB_STRING; | |
1712 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1713 | break; | |
1714 | } | |
1715 | ||
04aa13f8 | 1716 | case BYTECODE_OP_LOAD_S64: |
bf956ec0 | 1717 | { |
0305960f MD |
1718 | if (vstack_push(stack)) { |
1719 | ret = -EINVAL; | |
1720 | goto end; | |
1721 | } | |
1722 | vstack_ax(stack)->type = REG_S64; | |
bf956ec0 MD |
1723 | next_pc += sizeof(struct load_op) |
1724 | + sizeof(struct literal_numeric); | |
1725 | break; | |
1726 | } | |
1727 | ||
04aa13f8 | 1728 | case BYTECODE_OP_LOAD_DOUBLE: |
bf956ec0 | 1729 | { |
0305960f MD |
1730 | if (vstack_push(stack)) { |
1731 | ret = -EINVAL; | |
1732 | goto end; | |
1733 | } | |
1734 | vstack_ax(stack)->type = REG_DOUBLE; | |
bf956ec0 MD |
1735 | next_pc += sizeof(struct load_op) |
1736 | + sizeof(struct literal_double); | |
1737 | break; | |
1738 | } | |
1739 | ||
04aa13f8 FD |
1740 | case BYTECODE_OP_CAST_TO_S64: |
1741 | case BYTECODE_OP_CAST_DOUBLE_TO_S64: | |
bf956ec0 | 1742 | { |
0305960f MD |
1743 | /* Pop 1, push 1 */ |
1744 | if (!vstack_ax(stack)) { | |
1745 | ERR("Empty stack\n"); | |
1746 | ret = -EINVAL; | |
1747 | goto end; | |
1748 | } | |
47e5f13e MD |
1749 | switch (vstack_ax(stack)->type) { |
1750 | case REG_S64: | |
d97f9b78 | 1751 | case REG_U64: |
47e5f13e MD |
1752 | case REG_DOUBLE: |
1753 | case REG_UNKNOWN: | |
1754 | break; | |
1755 | default: | |
1756 | ERR("Incorrect register type %d for cast\n", | |
1757 | (int) vstack_ax(stack)->type); | |
1758 | ret = -EINVAL; | |
1759 | goto end; | |
1760 | } | |
0305960f | 1761 | vstack_ax(stack)->type = REG_S64; |
bf956ec0 MD |
1762 | next_pc += sizeof(struct cast_op); |
1763 | break; | |
1764 | } | |
04aa13f8 | 1765 | case BYTECODE_OP_CAST_NOP: |
bf956ec0 MD |
1766 | { |
1767 | next_pc += sizeof(struct cast_op); | |
1768 | break; | |
1769 | } | |
97b58163 | 1770 | |
47e5f13e MD |
1771 | /* |
1772 | * Instructions for recursive traversal through composed types. | |
1773 | */ | |
04aa13f8 FD |
1774 | case BYTECODE_OP_GET_CONTEXT_ROOT: |
1775 | case BYTECODE_OP_GET_APP_CONTEXT_ROOT: | |
1776 | case BYTECODE_OP_GET_PAYLOAD_ROOT: | |
47e5f13e MD |
1777 | { |
1778 | if (vstack_push(stack)) { | |
1779 | ret = -EINVAL; | |
1780 | goto end; | |
1781 | } | |
1782 | vstack_ax(stack)->type = REG_PTR; | |
1783 | next_pc += sizeof(struct load_op); | |
1784 | break; | |
1785 | } | |
1786 | ||
04aa13f8 | 1787 | case BYTECODE_OP_LOAD_FIELD: |
47e5f13e MD |
1788 | { |
1789 | /* Pop 1, push 1 */ | |
1790 | if (!vstack_ax(stack)) { | |
1791 | ERR("Empty stack\n"); | |
1792 | ret = -EINVAL; | |
1793 | goto end; | |
1794 | } | |
1795 | if (vstack_ax(stack)->type != REG_PTR) { | |
1796 | ERR("Expecting pointer on top of stack\n"); | |
1797 | ret = -EINVAL; | |
1798 | goto end; | |
1799 | } | |
1800 | vstack_ax(stack)->type = REG_UNKNOWN; | |
1801 | next_pc += sizeof(struct load_op); | |
1802 | break; | |
1803 | } | |
1804 | ||
04aa13f8 FD |
1805 | case BYTECODE_OP_LOAD_FIELD_S8: |
1806 | case BYTECODE_OP_LOAD_FIELD_S16: | |
1807 | case BYTECODE_OP_LOAD_FIELD_S32: | |
1808 | case BYTECODE_OP_LOAD_FIELD_S64: | |
d97f9b78 MD |
1809 | { |
1810 | /* Pop 1, push 1 */ | |
1811 | if (!vstack_ax(stack)) { | |
1812 | ERR("Empty stack\n"); | |
1813 | ret = -EINVAL; | |
1814 | goto end; | |
1815 | } | |
1816 | if (vstack_ax(stack)->type != REG_PTR) { | |
1817 | ERR("Expecting pointer on top of stack\n"); | |
1818 | ret = -EINVAL; | |
1819 | goto end; | |
1820 | } | |
1821 | vstack_ax(stack)->type = REG_S64; | |
1822 | next_pc += sizeof(struct load_op); | |
1823 | break; | |
1824 | } | |
1825 | ||
04aa13f8 FD |
1826 | case BYTECODE_OP_LOAD_FIELD_U8: |
1827 | case BYTECODE_OP_LOAD_FIELD_U16: | |
1828 | case BYTECODE_OP_LOAD_FIELD_U32: | |
1829 | case BYTECODE_OP_LOAD_FIELD_U64: | |
47e5f13e MD |
1830 | { |
1831 | /* Pop 1, push 1 */ | |
1832 | if (!vstack_ax(stack)) { | |
1833 | ERR("Empty stack\n"); | |
1834 | ret = -EINVAL; | |
1835 | goto end; | |
1836 | } | |
1837 | if (vstack_ax(stack)->type != REG_PTR) { | |
1838 | ERR("Expecting pointer on top of stack\n"); | |
1839 | ret = -EINVAL; | |
1840 | goto end; | |
1841 | } | |
d97f9b78 | 1842 | vstack_ax(stack)->type = REG_U64; |
47e5f13e MD |
1843 | next_pc += sizeof(struct load_op); |
1844 | break; | |
1845 | } | |
1846 | ||
04aa13f8 FD |
1847 | case BYTECODE_OP_LOAD_FIELD_STRING: |
1848 | case BYTECODE_OP_LOAD_FIELD_SEQUENCE: | |
47e5f13e MD |
1849 | { |
1850 | /* Pop 1, push 1 */ | |
1851 | if (!vstack_ax(stack)) { | |
1852 | ERR("Empty stack\n"); | |
1853 | ret = -EINVAL; | |
1854 | goto end; | |
1855 | } | |
1856 | if (vstack_ax(stack)->type != REG_PTR) { | |
1857 | ERR("Expecting pointer on top of stack\n"); | |
1858 | ret = -EINVAL; | |
1859 | goto end; | |
1860 | } | |
1861 | vstack_ax(stack)->type = REG_STRING; | |
1862 | next_pc += sizeof(struct load_op); | |
1863 | break; | |
1864 | } | |
1865 | ||
04aa13f8 | 1866 | case BYTECODE_OP_LOAD_FIELD_DOUBLE: |
47e5f13e MD |
1867 | { |
1868 | /* Pop 1, push 1 */ | |
1869 | if (!vstack_ax(stack)) { | |
1870 | ERR("Empty stack\n"); | |
1871 | ret = -EINVAL; | |
1872 | goto end; | |
1873 | } | |
1874 | if (vstack_ax(stack)->type != REG_PTR) { | |
1875 | ERR("Expecting pointer on top of stack\n"); | |
1876 | ret = -EINVAL; | |
1877 | goto end; | |
1878 | } | |
1879 | vstack_ax(stack)->type = REG_DOUBLE; | |
1880 | next_pc += sizeof(struct load_op); | |
1881 | break; | |
1882 | } | |
1883 | ||
04aa13f8 FD |
1884 | case BYTECODE_OP_GET_SYMBOL: |
1885 | case BYTECODE_OP_GET_SYMBOL_FIELD: | |
47e5f13e MD |
1886 | { |
1887 | /* Pop 1, push 1 */ | |
1888 | if (!vstack_ax(stack)) { | |
1889 | ERR("Empty stack\n"); | |
1890 | ret = -EINVAL; | |
1891 | goto end; | |
1892 | } | |
1893 | if (vstack_ax(stack)->type != REG_PTR) { | |
1894 | ERR("Expecting pointer on top of stack\n"); | |
1895 | ret = -EINVAL; | |
1896 | goto end; | |
1897 | } | |
1898 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1899 | break; | |
1900 | } | |
1901 | ||
04aa13f8 | 1902 | case BYTECODE_OP_GET_INDEX_U16: |
47e5f13e MD |
1903 | { |
1904 | /* Pop 1, push 1 */ | |
1905 | if (!vstack_ax(stack)) { | |
1906 | ERR("Empty stack\n"); | |
1907 | ret = -EINVAL; | |
1908 | goto end; | |
1909 | } | |
1910 | if (vstack_ax(stack)->type != REG_PTR) { | |
1911 | ERR("Expecting pointer on top of stack\n"); | |
1912 | ret = -EINVAL; | |
1913 | goto end; | |
1914 | } | |
1915 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); | |
1916 | break; | |
1917 | } | |
1918 | ||
04aa13f8 | 1919 | case BYTECODE_OP_GET_INDEX_U64: |
47e5f13e MD |
1920 | { |
1921 | /* Pop 1, push 1 */ | |
1922 | if (!vstack_ax(stack)) { | |
1923 | ERR("Empty stack\n"); | |
1924 | ret = -EINVAL; | |
1925 | goto end; | |
1926 | } | |
1927 | if (vstack_ax(stack)->type != REG_PTR) { | |
1928 | ERR("Expecting pointer on top of stack\n"); | |
1929 | ret = -EINVAL; | |
1930 | goto end; | |
1931 | } | |
1932 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); | |
1933 | break; | |
1934 | } | |
1935 | ||
bf956ec0 MD |
1936 | } |
1937 | end: | |
1938 | *_next_pc = next_pc; | |
1939 | return ret; | |
1940 | } | |
1941 | ||
1942 | /* | |
1943 | * Never called concurrently (hash seed is shared). | |
1944 | */ | |
04aa13f8 | 1945 | int lttng_bytecode_validate(struct bytecode_runtime *bytecode) |
bf956ec0 | 1946 | { |
10544ee8 | 1947 | struct lttng_ust_lfht *merge_points; |
22389ecb | 1948 | char *pc, *next_pc, *start_pc; |
bf956ec0 | 1949 | int ret = -EINVAL; |
0305960f | 1950 | struct vstack stack; |
bf956ec0 | 1951 | |
0305960f | 1952 | vstack_init(&stack); |
bf956ec0 MD |
1953 | |
1954 | if (!lttng_hash_seed_ready) { | |
1955 | lttng_hash_seed = time(NULL); | |
1956 | lttng_hash_seed_ready = 1; | |
1957 | } | |
1958 | /* | |
1959 | * Note: merge_points hash table used by single thread, and | |
1960 | * never concurrently resized. Therefore, we can use it without | |
1961 | * holding RCU read-side lock and free nodes without using | |
1962 | * call_rcu. | |
1963 | */ | |
10544ee8 | 1964 | merge_points = lttng_ust_lfht_new(DEFAULT_NR_MERGE_POINTS, |
bf956ec0 MD |
1965 | MIN_NR_BUCKETS, MAX_NR_BUCKETS, |
1966 | 0, NULL); | |
1967 | if (!merge_points) { | |
1968 | ERR("Error allocating hash table for bytecode validation\n"); | |
1969 | return -ENOMEM; | |
1970 | } | |
47e5f13e | 1971 | start_pc = &bytecode->code[0]; |
bf956ec0 MD |
1972 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; |
1973 | pc = next_pc) { | |
82513dbe MD |
1974 | ret = bytecode_validate_overflow(bytecode, start_pc, pc); |
1975 | if (ret != 0) { | |
1976 | if (ret == -ERANGE) | |
04aa13f8 | 1977 | ERR("Bytecode overflow\n"); |
bf956ec0 | 1978 | goto end; |
97b58163 | 1979 | } |
bf956ec0 | 1980 | dbg_printf("Validating op %s (%u)\n", |
bf617e20 | 1981 | lttng_bytecode_print_op((unsigned int) *(bytecode_opcode_t *) pc), |
04aa13f8 | 1982 | (unsigned int) *(bytecode_opcode_t *) pc); |
bf956ec0 MD |
1983 | |
1984 | /* | |
1985 | * For each instruction, validate the current context | |
1986 | * (traversal of entire execution flow), and validate | |
53569322 | 1987 | * all merge points targeting this instruction. |
bf956ec0 MD |
1988 | */ |
1989 | ret = validate_instruction_all_contexts(bytecode, merge_points, | |
0305960f | 1990 | &stack, start_pc, pc); |
bf956ec0 MD |
1991 | if (ret) |
1992 | goto end; | |
0305960f | 1993 | ret = exec_insn(bytecode, merge_points, &stack, &next_pc, pc); |
bf956ec0 MD |
1994 | if (ret <= 0) |
1995 | goto end; | |
97b58163 MD |
1996 | } |
1997 | end: | |
bf956ec0 MD |
1998 | if (delete_all_nodes(merge_points)) { |
1999 | if (!ret) { | |
2000 | ERR("Unexpected merge points\n"); | |
2001 | ret = -EINVAL; | |
2002 | } | |
2003 | } | |
10544ee8 | 2004 | if (lttng_ust_lfht_destroy(merge_points)) { |
bf956ec0 MD |
2005 | ERR("Error destroying hash table\n"); |
2006 | } | |
97b58163 MD |
2007 | return ret; |
2008 | } |