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 | ||
82235210 | 395 | /* load field and get context ref */ |
04aa13f8 | 396 | case BYTECODE_OP_LOAD_FIELD_REF: |
04aa13f8 FD |
397 | case BYTECODE_OP_GET_CONTEXT_REF: |
398 | case BYTECODE_OP_LOAD_FIELD_REF_STRING: | |
399 | case BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE: | |
400 | case BYTECODE_OP_LOAD_FIELD_REF_S64: | |
401 | case BYTECODE_OP_LOAD_FIELD_REF_DOUBLE: | |
402 | case BYTECODE_OP_GET_CONTEXT_REF_STRING: | |
403 | case BYTECODE_OP_GET_CONTEXT_REF_S64: | |
404 | case BYTECODE_OP_GET_CONTEXT_REF_DOUBLE: | |
97b58163 MD |
405 | { |
406 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct field_ref) | |
407 | > start_pc + bytecode->len)) { | |
82513dbe | 408 | ret = -ERANGE; |
97b58163 MD |
409 | } |
410 | break; | |
411 | } | |
412 | ||
77aa5901 | 413 | /* load from immediate operand */ |
04aa13f8 FD |
414 | case BYTECODE_OP_LOAD_STRING: |
415 | case BYTECODE_OP_LOAD_STAR_GLOB_STRING: | |
97b58163 MD |
416 | { |
417 | struct load_op *insn = (struct load_op *) pc; | |
418 | uint32_t str_len, maxlen; | |
419 | ||
420 | if (unlikely(pc + sizeof(struct load_op) | |
421 | > start_pc + bytecode->len)) { | |
82513dbe | 422 | ret = -ERANGE; |
97b58163 MD |
423 | break; |
424 | } | |
425 | ||
426 | maxlen = start_pc + bytecode->len - pc - sizeof(struct load_op); | |
427 | str_len = strnlen(insn->data, maxlen); | |
428 | if (unlikely(str_len >= maxlen)) { | |
429 | /* Final '\0' not found within range */ | |
82513dbe | 430 | ret = -ERANGE; |
97b58163 MD |
431 | } |
432 | break; | |
433 | } | |
434 | ||
04aa13f8 | 435 | case BYTECODE_OP_LOAD_S64: |
97b58163 MD |
436 | { |
437 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct literal_numeric) | |
438 | > start_pc + bytecode->len)) { | |
82513dbe | 439 | ret = -ERANGE; |
97b58163 MD |
440 | } |
441 | break; | |
442 | } | |
443 | ||
04aa13f8 | 444 | case BYTECODE_OP_LOAD_DOUBLE: |
97b58163 MD |
445 | { |
446 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct literal_double) | |
447 | > start_pc + bytecode->len)) { | |
82513dbe | 448 | ret = -ERANGE; |
97b58163 MD |
449 | } |
450 | break; | |
451 | } | |
452 | ||
04aa13f8 FD |
453 | case BYTECODE_OP_CAST_TO_S64: |
454 | case BYTECODE_OP_CAST_DOUBLE_TO_S64: | |
455 | case BYTECODE_OP_CAST_NOP: | |
97b58163 MD |
456 | { |
457 | if (unlikely(pc + sizeof(struct cast_op) | |
458 | > start_pc + bytecode->len)) { | |
82513dbe | 459 | ret = -ERANGE; |
97b58163 MD |
460 | } |
461 | break; | |
462 | } | |
77aa5901 | 463 | |
47e5f13e MD |
464 | /* |
465 | * Instructions for recursive traversal through composed types. | |
466 | */ | |
04aa13f8 FD |
467 | case BYTECODE_OP_GET_CONTEXT_ROOT: |
468 | case BYTECODE_OP_GET_APP_CONTEXT_ROOT: | |
469 | case BYTECODE_OP_GET_PAYLOAD_ROOT: | |
470 | case BYTECODE_OP_LOAD_FIELD: | |
471 | case BYTECODE_OP_LOAD_FIELD_S8: | |
472 | case BYTECODE_OP_LOAD_FIELD_S16: | |
473 | case BYTECODE_OP_LOAD_FIELD_S32: | |
474 | case BYTECODE_OP_LOAD_FIELD_S64: | |
475 | case BYTECODE_OP_LOAD_FIELD_U8: | |
476 | case BYTECODE_OP_LOAD_FIELD_U16: | |
477 | case BYTECODE_OP_LOAD_FIELD_U32: | |
478 | case BYTECODE_OP_LOAD_FIELD_U64: | |
479 | case BYTECODE_OP_LOAD_FIELD_STRING: | |
480 | case BYTECODE_OP_LOAD_FIELD_SEQUENCE: | |
481 | case BYTECODE_OP_LOAD_FIELD_DOUBLE: | |
47e5f13e MD |
482 | if (unlikely(pc + sizeof(struct load_op) |
483 | > start_pc + bytecode->len)) { | |
484 | ret = -ERANGE; | |
485 | } | |
486 | break; | |
487 | ||
04aa13f8 | 488 | case BYTECODE_OP_GET_SYMBOL: |
47e5f13e MD |
489 | { |
490 | struct load_op *insn = (struct load_op *) pc; | |
491 | struct get_symbol *sym = (struct get_symbol *) insn->data; | |
492 | ||
493 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct get_symbol) | |
494 | > start_pc + bytecode->len)) { | |
495 | ret = -ERANGE; | |
90732639 | 496 | break; |
47e5f13e MD |
497 | } |
498 | ret = validate_get_symbol(bytecode, sym); | |
499 | break; | |
500 | } | |
501 | ||
04aa13f8 | 502 | case BYTECODE_OP_GET_SYMBOL_FIELD: |
47e5f13e MD |
503 | ERR("Unexpected get symbol field"); |
504 | ret = -EINVAL; | |
505 | break; | |
506 | ||
04aa13f8 | 507 | case BYTECODE_OP_GET_INDEX_U16: |
47e5f13e MD |
508 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct get_index_u16) |
509 | > start_pc + bytecode->len)) { | |
510 | ret = -ERANGE; | |
511 | } | |
512 | break; | |
513 | ||
04aa13f8 | 514 | case BYTECODE_OP_GET_INDEX_U64: |
47e5f13e MD |
515 | if (unlikely(pc + sizeof(struct load_op) + sizeof(struct get_index_u64) |
516 | > start_pc + bytecode->len)) { | |
517 | ret = -ERANGE; | |
518 | } | |
519 | break; | |
97b58163 MD |
520 | } |
521 | ||
522 | return ret; | |
523 | } | |
524 | ||
bf956ec0 | 525 | static |
10544ee8 | 526 | unsigned long delete_all_nodes(struct lttng_ust_lfht *ht) |
97b58163 | 527 | { |
10544ee8 | 528 | struct lttng_ust_lfht_iter iter; |
bf956ec0 MD |
529 | struct lfht_mp_node *node; |
530 | unsigned long nr_nodes = 0; | |
97b58163 | 531 | |
10544ee8 | 532 | lttng_ust_lfht_for_each_entry(ht, &iter, node, node) { |
bf956ec0 MD |
533 | int ret; |
534 | ||
10544ee8 | 535 | ret = lttng_ust_lfht_del(ht, lttng_ust_lfht_iter_get_node(&iter)); |
bf956ec0 MD |
536 | assert(!ret); |
537 | /* note: this hash table is never used concurrently */ | |
538 | free(node); | |
539 | nr_nodes++; | |
97b58163 | 540 | } |
bf956ec0 MD |
541 | return nr_nodes; |
542 | } | |
97b58163 | 543 | |
bf956ec0 MD |
544 | /* |
545 | * Return value: | |
53569322 | 546 | * >=0: success |
bf956ec0 MD |
547 | * <0: error |
548 | */ | |
549 | static | |
2208d8b5 MJ |
550 | int validate_instruction_context( |
551 | struct bytecode_runtime *bytecode __attribute__((unused)), | |
0305960f | 552 | struct vstack *stack, |
22389ecb MD |
553 | char *start_pc, |
554 | char *pc) | |
bf956ec0 MD |
555 | { |
556 | int ret = 0; | |
04aa13f8 | 557 | const bytecode_opcode_t opcode = *(bytecode_opcode_t *) pc; |
bf956ec0 | 558 | |
3151a51d | 559 | switch (opcode) { |
04aa13f8 | 560 | case BYTECODE_OP_UNKNOWN: |
bf956ec0 MD |
561 | default: |
562 | { | |
563 | ERR("unknown bytecode op %u\n", | |
04aa13f8 | 564 | (unsigned int) *(bytecode_opcode_t *) pc); |
bf956ec0 MD |
565 | ret = -EINVAL; |
566 | goto end; | |
567 | } | |
568 | ||
04aa13f8 FD |
569 | case BYTECODE_OP_RETURN: |
570 | case BYTECODE_OP_RETURN_S64: | |
bf956ec0 MD |
571 | { |
572 | goto end; | |
573 | } | |
574 | ||
575 | /* binary */ | |
04aa13f8 FD |
576 | case BYTECODE_OP_MUL: |
577 | case BYTECODE_OP_DIV: | |
578 | case BYTECODE_OP_MOD: | |
579 | case BYTECODE_OP_PLUS: | |
580 | case BYTECODE_OP_MINUS: | |
bf956ec0 MD |
581 | { |
582 | ERR("unsupported bytecode op %u\n", | |
3151a51d | 583 | (unsigned int) opcode); |
bf956ec0 MD |
584 | ret = -EINVAL; |
585 | goto end; | |
586 | } | |
97b58163 | 587 | |
04aa13f8 | 588 | case BYTECODE_OP_EQ: |
bf956ec0 | 589 | { |
3151a51d | 590 | ret = bin_op_compare_check(stack, opcode, "=="); |
53569322 | 591 | if (ret < 0) |
bf956ec0 MD |
592 | goto end; |
593 | break; | |
594 | } | |
04aa13f8 | 595 | case BYTECODE_OP_NE: |
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_GT: |
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_LT: |
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_GE: |
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_LE: |
bf956ec0 | 624 | { |
3151a51d | 625 | ret = bin_op_compare_check(stack, opcode, "<="); |
53569322 | 626 | if (ret < 0) |
97b58163 | 627 | goto end; |
bf956ec0 MD |
628 | break; |
629 | } | |
97b58163 | 630 | |
04aa13f8 FD |
631 | case BYTECODE_OP_EQ_STRING: |
632 | case BYTECODE_OP_NE_STRING: | |
633 | case BYTECODE_OP_GT_STRING: | |
634 | case BYTECODE_OP_LT_STRING: | |
635 | case BYTECODE_OP_GE_STRING: | |
636 | case BYTECODE_OP_LE_STRING: | |
bf956ec0 | 637 | { |
0305960f MD |
638 | if (!vstack_ax(stack) || !vstack_bx(stack)) { |
639 | ERR("Empty stack\n"); | |
640 | ret = -EINVAL; | |
641 | goto end; | |
642 | } | |
643 | if (vstack_ax(stack)->type != REG_STRING | |
644 | || vstack_bx(stack)->type != REG_STRING) { | |
bf956ec0 | 645 | ERR("Unexpected register type for string comparator\n"); |
97b58163 MD |
646 | ret = -EINVAL; |
647 | goto end; | |
97b58163 | 648 | } |
bf956ec0 MD |
649 | break; |
650 | } | |
97b58163 | 651 | |
04aa13f8 FD |
652 | case BYTECODE_OP_EQ_STAR_GLOB_STRING: |
653 | case BYTECODE_OP_NE_STAR_GLOB_STRING: | |
3151a51d PP |
654 | { |
655 | if (!vstack_ax(stack) || !vstack_bx(stack)) { | |
656 | ERR("Empty stack\n"); | |
657 | ret = -EINVAL; | |
658 | goto end; | |
659 | } | |
660 | if (vstack_ax(stack)->type != REG_STAR_GLOB_STRING | |
661 | && vstack_bx(stack)->type != REG_STAR_GLOB_STRING) { | |
662 | ERR("Unexpected register type for globbing pattern comparator\n"); | |
663 | ret = -EINVAL; | |
664 | goto end; | |
665 | } | |
666 | break; | |
667 | } | |
668 | ||
04aa13f8 FD |
669 | case BYTECODE_OP_EQ_S64: |
670 | case BYTECODE_OP_NE_S64: | |
671 | case BYTECODE_OP_GT_S64: | |
672 | case BYTECODE_OP_LT_S64: | |
673 | case BYTECODE_OP_GE_S64: | |
674 | case BYTECODE_OP_LE_S64: | |
bf956ec0 | 675 | { |
0305960f MD |
676 | if (!vstack_ax(stack) || !vstack_bx(stack)) { |
677 | ERR("Empty stack\n"); | |
678 | ret = -EINVAL; | |
679 | goto end; | |
680 | } | |
d97f9b78 MD |
681 | switch (vstack_ax(stack)->type) { |
682 | case REG_S64: | |
683 | case REG_U64: | |
684 | break; | |
685 | default: | |
686 | ERR("Unexpected register type for s64 comparator\n"); | |
687 | ret = -EINVAL; | |
688 | goto end; | |
689 | } | |
690 | switch (vstack_bx(stack)->type) { | |
691 | case REG_S64: | |
692 | case REG_U64: | |
693 | break; | |
694 | default: | |
bf956ec0 MD |
695 | ERR("Unexpected register type for s64 comparator\n"); |
696 | ret = -EINVAL; | |
697 | goto end; | |
97b58163 | 698 | } |
bf956ec0 MD |
699 | break; |
700 | } | |
97b58163 | 701 | |
04aa13f8 FD |
702 | case BYTECODE_OP_EQ_DOUBLE: |
703 | case BYTECODE_OP_NE_DOUBLE: | |
704 | case BYTECODE_OP_GT_DOUBLE: | |
705 | case BYTECODE_OP_LT_DOUBLE: | |
706 | case BYTECODE_OP_GE_DOUBLE: | |
707 | case BYTECODE_OP_LE_DOUBLE: | |
bf956ec0 | 708 | { |
0305960f MD |
709 | if (!vstack_ax(stack) || !vstack_bx(stack)) { |
710 | ERR("Empty stack\n"); | |
711 | ret = -EINVAL; | |
712 | goto end; | |
713 | } | |
dbea82ec MD |
714 | if (vstack_ax(stack)->type != REG_DOUBLE && vstack_bx(stack)->type != REG_DOUBLE) { |
715 | ERR("Double operator should have two double registers\n"); | |
bf956ec0 MD |
716 | ret = -EINVAL; |
717 | goto end; | |
97b58163 | 718 | } |
dbea82ec MD |
719 | break; |
720 | } | |
721 | ||
04aa13f8 FD |
722 | case BYTECODE_OP_EQ_DOUBLE_S64: |
723 | case BYTECODE_OP_NE_DOUBLE_S64: | |
724 | case BYTECODE_OP_GT_DOUBLE_S64: | |
725 | case BYTECODE_OP_LT_DOUBLE_S64: | |
726 | case BYTECODE_OP_GE_DOUBLE_S64: | |
727 | case BYTECODE_OP_LE_DOUBLE_S64: | |
dbea82ec MD |
728 | { |
729 | if (!vstack_ax(stack) || !vstack_bx(stack)) { | |
730 | ERR("Empty stack\n"); | |
731 | ret = -EINVAL; | |
732 | goto end; | |
733 | } | |
d97f9b78 MD |
734 | switch (vstack_ax(stack)->type) { |
735 | case REG_S64: | |
736 | case REG_U64: | |
737 | break; | |
738 | default: | |
739 | ERR("Double-S64 operator has unexpected register types\n"); | |
740 | ret = -EINVAL; | |
741 | goto end; | |
742 | } | |
743 | switch (vstack_bx(stack)->type) { | |
744 | case REG_DOUBLE: | |
745 | break; | |
746 | default: | |
dbea82ec MD |
747 | ERR("Double-S64 operator has unexpected register types\n"); |
748 | ret = -EINVAL; | |
749 | goto end; | |
750 | } | |
751 | break; | |
752 | } | |
753 | ||
04aa13f8 FD |
754 | case BYTECODE_OP_EQ_S64_DOUBLE: |
755 | case BYTECODE_OP_NE_S64_DOUBLE: | |
756 | case BYTECODE_OP_GT_S64_DOUBLE: | |
757 | case BYTECODE_OP_LT_S64_DOUBLE: | |
758 | case BYTECODE_OP_GE_S64_DOUBLE: | |
759 | case BYTECODE_OP_LE_S64_DOUBLE: | |
dbea82ec MD |
760 | { |
761 | if (!vstack_ax(stack) || !vstack_bx(stack)) { | |
762 | ERR("Empty stack\n"); | |
763 | ret = -EINVAL; | |
764 | goto end; | |
765 | } | |
d97f9b78 MD |
766 | switch (vstack_ax(stack)->type) { |
767 | case REG_DOUBLE: | |
768 | break; | |
769 | default: | |
770 | ERR("S64-Double operator has unexpected register types\n"); | |
771 | ret = -EINVAL; | |
772 | goto end; | |
773 | } | |
774 | switch (vstack_bx(stack)->type) { | |
775 | case REG_S64: | |
776 | case REG_U64: | |
777 | break; | |
778 | default: | |
dbea82ec | 779 | ERR("S64-Double operator has unexpected register types\n"); |
bf956ec0 MD |
780 | ret = -EINVAL; |
781 | goto end; | |
97b58163 | 782 | } |
bf956ec0 MD |
783 | break; |
784 | } | |
97b58163 | 785 | |
04aa13f8 | 786 | case BYTECODE_OP_BIT_RSHIFT: |
0039e2d8 MD |
787 | ret = bin_op_bitwise_check(stack, opcode, ">>"); |
788 | if (ret < 0) | |
789 | goto end; | |
790 | break; | |
04aa13f8 | 791 | case BYTECODE_OP_BIT_LSHIFT: |
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_AND: |
47e5f13e MD |
797 | ret = bin_op_bitwise_check(stack, opcode, "&"); |
798 | if (ret < 0) | |
799 | goto end; | |
800 | break; | |
04aa13f8 | 801 | case BYTECODE_OP_BIT_OR: |
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_XOR: |
47e5f13e MD |
807 | ret = bin_op_bitwise_check(stack, opcode, "^"); |
808 | if (ret < 0) | |
809 | goto end; | |
810 | break; | |
811 | ||
bf956ec0 | 812 | /* unary */ |
04aa13f8 FD |
813 | case BYTECODE_OP_UNARY_PLUS: |
814 | case BYTECODE_OP_UNARY_MINUS: | |
815 | case BYTECODE_OP_UNARY_NOT: | |
bf956ec0 | 816 | { |
0305960f MD |
817 | if (!vstack_ax(stack)) { |
818 | ERR("Empty stack\n"); | |
bf956ec0 MD |
819 | ret = -EINVAL; |
820 | goto end; | |
821 | } | |
0305960f | 822 | switch (vstack_ax(stack)->type) { |
bf956ec0 MD |
823 | default: |
824 | ERR("unknown register type\n"); | |
825 | ret = -EINVAL; | |
826 | goto end; | |
97b58163 | 827 | |
bf956ec0 | 828 | case REG_STRING: |
3151a51d | 829 | case REG_STAR_GLOB_STRING: |
bf956ec0 MD |
830 | ERR("Unary op can only be applied to numeric or floating point registers\n"); |
831 | ret = -EINVAL; | |
832 | goto end; | |
833 | case REG_S64: | |
834 | break; | |
d97f9b78 MD |
835 | case REG_U64: |
836 | break; | |
bf956ec0 | 837 | case REG_DOUBLE: |
97b58163 | 838 | break; |
53569322 MD |
839 | case REG_UNKNOWN: |
840 | break; | |
97b58163 | 841 | } |
bf956ec0 MD |
842 | break; |
843 | } | |
04aa13f8 | 844 | case BYTECODE_OP_UNARY_BIT_NOT: |
0039e2d8 MD |
845 | { |
846 | if (!vstack_ax(stack)) { | |
847 | ERR("Empty stack\n"); | |
848 | ret = -EINVAL; | |
849 | goto end; | |
850 | } | |
851 | switch (vstack_ax(stack)->type) { | |
852 | default: | |
853 | ERR("unknown register type\n"); | |
854 | ret = -EINVAL; | |
855 | goto end; | |
856 | ||
857 | case REG_STRING: | |
858 | case REG_STAR_GLOB_STRING: | |
859 | case REG_DOUBLE: | |
860 | ERR("Unary bitwise op can only be applied to numeric registers\n"); | |
861 | ret = -EINVAL; | |
862 | goto end; | |
863 | case REG_S64: | |
864 | break; | |
d97f9b78 MD |
865 | case REG_U64: |
866 | break; | |
0039e2d8 MD |
867 | case REG_UNKNOWN: |
868 | break; | |
869 | } | |
870 | break; | |
871 | } | |
97b58163 | 872 | |
04aa13f8 FD |
873 | case BYTECODE_OP_UNARY_PLUS_S64: |
874 | case BYTECODE_OP_UNARY_MINUS_S64: | |
875 | case BYTECODE_OP_UNARY_NOT_S64: | |
bf956ec0 | 876 | { |
0305960f MD |
877 | if (!vstack_ax(stack)) { |
878 | ERR("Empty stack\n"); | |
bf956ec0 MD |
879 | ret = -EINVAL; |
880 | goto end; | |
881 | } | |
d97f9b78 MD |
882 | if (vstack_ax(stack)->type != REG_S64 && |
883 | vstack_ax(stack)->type != REG_U64) { | |
bf956ec0 MD |
884 | ERR("Invalid register type\n"); |
885 | ret = -EINVAL; | |
886 | goto end; | |
97b58163 | 887 | } |
bf956ec0 MD |
888 | break; |
889 | } | |
97b58163 | 890 | |
04aa13f8 FD |
891 | case BYTECODE_OP_UNARY_PLUS_DOUBLE: |
892 | case BYTECODE_OP_UNARY_MINUS_DOUBLE: | |
893 | case BYTECODE_OP_UNARY_NOT_DOUBLE: | |
bf956ec0 | 894 | { |
0305960f MD |
895 | if (!vstack_ax(stack)) { |
896 | ERR("Empty stack\n"); | |
bf956ec0 MD |
897 | ret = -EINVAL; |
898 | goto end; | |
97b58163 | 899 | } |
0305960f | 900 | if (vstack_ax(stack)->type != REG_DOUBLE) { |
bf956ec0 MD |
901 | ERR("Invalid register type\n"); |
902 | ret = -EINVAL; | |
903 | goto end; | |
904 | } | |
905 | break; | |
906 | } | |
97b58163 | 907 | |
bf956ec0 | 908 | /* logical */ |
04aa13f8 FD |
909 | case BYTECODE_OP_AND: |
910 | case BYTECODE_OP_OR: | |
bf956ec0 MD |
911 | { |
912 | struct logical_op *insn = (struct logical_op *) pc; | |
97b58163 | 913 | |
0305960f MD |
914 | if (!vstack_ax(stack)) { |
915 | ERR("Empty stack\n"); | |
916 | ret = -EINVAL; | |
917 | goto end; | |
918 | } | |
53569322 | 919 | if (vstack_ax(stack)->type != REG_S64 |
d97f9b78 | 920 | && vstack_ax(stack)->type != REG_U64 |
53569322 | 921 | && vstack_ax(stack)->type != REG_UNKNOWN) { |
d97f9b78 | 922 | ERR("Logical comparator expects S64, U64 or dynamic register\n"); |
bf956ec0 MD |
923 | ret = -EINVAL; |
924 | goto end; | |
97b58163 MD |
925 | } |
926 | ||
bf956ec0 MD |
927 | dbg_printf("Validate jumping to bytecode offset %u\n", |
928 | (unsigned int) insn->skip_offset); | |
929 | if (unlikely(start_pc + insn->skip_offset <= pc)) { | |
930 | ERR("Loops are not allowed in bytecode\n"); | |
97b58163 MD |
931 | ret = -EINVAL; |
932 | goto end; | |
933 | } | |
bf956ec0 MD |
934 | break; |
935 | } | |
97b58163 | 936 | |
77aa5901 | 937 | /* load field ref */ |
04aa13f8 | 938 | case BYTECODE_OP_LOAD_FIELD_REF: |
bf956ec0 MD |
939 | { |
940 | ERR("Unknown field ref type\n"); | |
941 | ret = -EINVAL; | |
942 | goto end; | |
943 | } | |
04aa13f8 FD |
944 | case BYTECODE_OP_LOAD_FIELD_REF_STRING: |
945 | case BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE: | |
bf956ec0 MD |
946 | { |
947 | struct load_op *insn = (struct load_op *) pc; | |
948 | struct field_ref *ref = (struct field_ref *) insn->data; | |
949 | ||
bf956ec0 MD |
950 | dbg_printf("Validate load field ref offset %u type string\n", |
951 | ref->offset); | |
952 | break; | |
953 | } | |
04aa13f8 | 954 | case BYTECODE_OP_LOAD_FIELD_REF_S64: |
bf956ec0 MD |
955 | { |
956 | struct load_op *insn = (struct load_op *) pc; | |
957 | struct field_ref *ref = (struct field_ref *) insn->data; | |
97b58163 | 958 | |
bf956ec0 MD |
959 | dbg_printf("Validate load field ref offset %u type s64\n", |
960 | ref->offset); | |
961 | break; | |
962 | } | |
04aa13f8 | 963 | case BYTECODE_OP_LOAD_FIELD_REF_DOUBLE: |
bf956ec0 MD |
964 | { |
965 | struct load_op *insn = (struct load_op *) pc; | |
966 | struct field_ref *ref = (struct field_ref *) insn->data; | |
97b58163 | 967 | |
bf956ec0 MD |
968 | dbg_printf("Validate load field ref offset %u type double\n", |
969 | ref->offset); | |
970 | break; | |
971 | } | |
97b58163 | 972 | |
77aa5901 | 973 | /* load from immediate operand */ |
04aa13f8 FD |
974 | case BYTECODE_OP_LOAD_STRING: |
975 | case BYTECODE_OP_LOAD_STAR_GLOB_STRING: | |
bf956ec0 | 976 | { |
bf956ec0 MD |
977 | break; |
978 | } | |
97b58163 | 979 | |
04aa13f8 | 980 | case BYTECODE_OP_LOAD_S64: |
bf956ec0 | 981 | { |
bf956ec0 MD |
982 | break; |
983 | } | |
97b58163 | 984 | |
04aa13f8 | 985 | case BYTECODE_OP_LOAD_DOUBLE: |
bf956ec0 | 986 | { |
bf956ec0 MD |
987 | break; |
988 | } | |
97b58163 | 989 | |
04aa13f8 FD |
990 | case BYTECODE_OP_CAST_TO_S64: |
991 | case BYTECODE_OP_CAST_DOUBLE_TO_S64: | |
bf956ec0 MD |
992 | { |
993 | struct cast_op *insn = (struct cast_op *) pc; | |
97b58163 | 994 | |
0305960f MD |
995 | if (!vstack_ax(stack)) { |
996 | ERR("Empty stack\n"); | |
bf956ec0 MD |
997 | ret = -EINVAL; |
998 | goto end; | |
999 | } | |
0305960f | 1000 | switch (vstack_ax(stack)->type) { |
bf956ec0 MD |
1001 | default: |
1002 | ERR("unknown register type\n"); | |
1003 | ret = -EINVAL; | |
1004 | goto end; | |
97b58163 | 1005 | |
bf956ec0 | 1006 | case REG_STRING: |
3151a51d | 1007 | case REG_STAR_GLOB_STRING: |
bf956ec0 MD |
1008 | ERR("Cast op can only be applied to numeric or floating point registers\n"); |
1009 | ret = -EINVAL; | |
1010 | goto end; | |
1011 | case REG_S64: | |
1012 | break; | |
d97f9b78 MD |
1013 | case REG_U64: |
1014 | break; | |
bf956ec0 MD |
1015 | case REG_DOUBLE: |
1016 | break; | |
53569322 MD |
1017 | case REG_UNKNOWN: |
1018 | break; | |
bf956ec0 | 1019 | } |
04aa13f8 | 1020 | if (insn->op == BYTECODE_OP_CAST_DOUBLE_TO_S64) { |
0305960f | 1021 | if (vstack_ax(stack)->type != REG_DOUBLE) { |
bf956ec0 | 1022 | ERR("Cast expects double\n"); |
97b58163 MD |
1023 | ret = -EINVAL; |
1024 | goto end; | |
97b58163 | 1025 | } |
97b58163 | 1026 | } |
bf956ec0 MD |
1027 | break; |
1028 | } | |
04aa13f8 | 1029 | case BYTECODE_OP_CAST_NOP: |
bf956ec0 MD |
1030 | { |
1031 | break; | |
1032 | } | |
1033 | ||
77aa5901 | 1034 | /* get context ref */ |
04aa13f8 | 1035 | case BYTECODE_OP_GET_CONTEXT_REF: |
77aa5901 | 1036 | { |
53569322 MD |
1037 | struct load_op *insn = (struct load_op *) pc; |
1038 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1039 | ||
1040 | dbg_printf("Validate get context ref offset %u type dynamic\n", | |
1041 | ref->offset); | |
1042 | break; | |
77aa5901 | 1043 | } |
04aa13f8 | 1044 | case BYTECODE_OP_GET_CONTEXT_REF_STRING: |
77aa5901 MD |
1045 | { |
1046 | struct load_op *insn = (struct load_op *) pc; | |
1047 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1048 | ||
1049 | dbg_printf("Validate get context ref offset %u type string\n", | |
1050 | ref->offset); | |
1051 | break; | |
1052 | } | |
04aa13f8 | 1053 | case BYTECODE_OP_GET_CONTEXT_REF_S64: |
77aa5901 MD |
1054 | { |
1055 | struct load_op *insn = (struct load_op *) pc; | |
1056 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1057 | ||
1058 | dbg_printf("Validate get context ref offset %u type s64\n", | |
1059 | ref->offset); | |
1060 | break; | |
1061 | } | |
04aa13f8 | 1062 | case BYTECODE_OP_GET_CONTEXT_REF_DOUBLE: |
77aa5901 MD |
1063 | { |
1064 | struct load_op *insn = (struct load_op *) pc; | |
1065 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1066 | ||
1067 | dbg_printf("Validate get context ref offset %u type double\n", | |
1068 | ref->offset); | |
1069 | break; | |
1070 | } | |
1071 | ||
47e5f13e MD |
1072 | /* |
1073 | * Instructions for recursive traversal through composed types. | |
1074 | */ | |
04aa13f8 | 1075 | case BYTECODE_OP_GET_CONTEXT_ROOT: |
47e5f13e MD |
1076 | { |
1077 | dbg_printf("Validate get context root\n"); | |
1078 | break; | |
1079 | } | |
04aa13f8 | 1080 | case BYTECODE_OP_GET_APP_CONTEXT_ROOT: |
47e5f13e MD |
1081 | { |
1082 | dbg_printf("Validate get app context root\n"); | |
1083 | break; | |
1084 | } | |
04aa13f8 | 1085 | case BYTECODE_OP_GET_PAYLOAD_ROOT: |
47e5f13e MD |
1086 | { |
1087 | dbg_printf("Validate get payload root\n"); | |
1088 | break; | |
1089 | } | |
04aa13f8 | 1090 | case BYTECODE_OP_LOAD_FIELD: |
47e5f13e MD |
1091 | { |
1092 | /* | |
1093 | * We tolerate that field type is unknown at validation, | |
1094 | * because we are performing the load specialization in | |
1095 | * a phase after validation. | |
1096 | */ | |
1097 | dbg_printf("Validate load field\n"); | |
1098 | break; | |
1099 | } | |
c7ef2e7d MD |
1100 | |
1101 | /* | |
1102 | * Disallow already specialized bytecode op load field instructions to | |
1103 | * ensure that the received bytecode does not read a memory area larger | |
1104 | * than the memory targeted by the instrumentation. | |
1105 | */ | |
04aa13f8 | 1106 | case BYTECODE_OP_LOAD_FIELD_S8: |
04aa13f8 | 1107 | case BYTECODE_OP_LOAD_FIELD_S16: |
04aa13f8 | 1108 | case BYTECODE_OP_LOAD_FIELD_S32: |
04aa13f8 | 1109 | case BYTECODE_OP_LOAD_FIELD_S64: |
04aa13f8 | 1110 | case BYTECODE_OP_LOAD_FIELD_U8: |
04aa13f8 | 1111 | case BYTECODE_OP_LOAD_FIELD_U16: |
04aa13f8 | 1112 | case BYTECODE_OP_LOAD_FIELD_U32: |
04aa13f8 | 1113 | case BYTECODE_OP_LOAD_FIELD_U64: |
04aa13f8 | 1114 | case BYTECODE_OP_LOAD_FIELD_STRING: |
04aa13f8 | 1115 | case BYTECODE_OP_LOAD_FIELD_SEQUENCE: |
04aa13f8 | 1116 | case BYTECODE_OP_LOAD_FIELD_DOUBLE: |
47e5f13e | 1117 | { |
c7ef2e7d MD |
1118 | dbg_printf("Validate load field, reject specialized load instruction (%d)\n", |
1119 | (int) opcode); | |
1120 | ret = -EINVAL; | |
1121 | goto end; | |
47e5f13e MD |
1122 | } |
1123 | ||
04aa13f8 | 1124 | case BYTECODE_OP_GET_SYMBOL: |
47e5f13e MD |
1125 | { |
1126 | struct load_op *insn = (struct load_op *) pc; | |
1127 | struct get_symbol *sym = (struct get_symbol *) insn->data; | |
1128 | ||
1129 | dbg_printf("Validate get symbol offset %u\n", sym->offset); | |
1130 | break; | |
1131 | } | |
1132 | ||
04aa13f8 | 1133 | case BYTECODE_OP_GET_SYMBOL_FIELD: |
47e5f13e MD |
1134 | { |
1135 | struct load_op *insn = (struct load_op *) pc; | |
1136 | struct get_symbol *sym = (struct get_symbol *) insn->data; | |
1137 | ||
1138 | dbg_printf("Validate get symbol field offset %u\n", sym->offset); | |
1139 | break; | |
1140 | } | |
1141 | ||
04aa13f8 | 1142 | case BYTECODE_OP_GET_INDEX_U16: |
47e5f13e MD |
1143 | { |
1144 | struct load_op *insn = (struct load_op *) pc; | |
1145 | struct get_index_u16 *get_index = (struct get_index_u16 *) insn->data; | |
1146 | ||
1147 | dbg_printf("Validate get index u16 index %u\n", get_index->index); | |
1148 | break; | |
1149 | } | |
1150 | ||
04aa13f8 | 1151 | case BYTECODE_OP_GET_INDEX_U64: |
47e5f13e MD |
1152 | { |
1153 | struct load_op *insn = (struct load_op *) pc; | |
1154 | struct get_index_u64 *get_index = (struct get_index_u64 *) insn->data; | |
1155 | ||
1156 | dbg_printf("Validate get index u64 index %" PRIu64 "\n", get_index->index); | |
1157 | break; | |
1158 | } | |
bf956ec0 MD |
1159 | } |
1160 | end: | |
1161 | return ret; | |
1162 | } | |
1163 | ||
1164 | /* | |
1165 | * Return value: | |
1166 | * 0: success | |
1167 | * <0: error | |
1168 | */ | |
1169 | static | |
1170 | int validate_instruction_all_contexts(struct bytecode_runtime *bytecode, | |
10544ee8 | 1171 | struct lttng_ust_lfht *merge_points, |
0305960f | 1172 | struct vstack *stack, |
22389ecb MD |
1173 | char *start_pc, |
1174 | char *pc) | |
bf956ec0 MD |
1175 | { |
1176 | int ret; | |
1177 | unsigned long target_pc = pc - start_pc; | |
10544ee8 MD |
1178 | struct lttng_ust_lfht_iter iter; |
1179 | struct lttng_ust_lfht_node *node; | |
71c1ceeb | 1180 | struct lfht_mp_node *mp_node; |
bf956ec0 MD |
1181 | unsigned long hash; |
1182 | ||
1183 | /* Validate the context resulting from the previous instruction */ | |
0305960f | 1184 | ret = validate_instruction_context(bytecode, stack, start_pc, pc); |
53569322 | 1185 | if (ret < 0) |
bf956ec0 MD |
1186 | return ret; |
1187 | ||
1188 | /* Validate merge points */ | |
22389ecb | 1189 | hash = lttng_hash_mix((const char *) target_pc, sizeof(target_pc), |
bf956ec0 | 1190 | lttng_hash_seed); |
10544ee8 | 1191 | lttng_ust_lfht_lookup(merge_points, hash, lttng_hash_match, |
22389ecb | 1192 | (const char *) target_pc, &iter); |
10544ee8 | 1193 | node = lttng_ust_lfht_iter_get_node(&iter); |
71c1ceeb MD |
1194 | if (node) { |
1195 | mp_node = caa_container_of(node, struct lfht_mp_node, node); | |
3151a51d | 1196 | |
04aa13f8 | 1197 | dbg_printf("Bytecode: validate merge point at offset %lu\n", |
bf956ec0 | 1198 | target_pc); |
71c1ceeb MD |
1199 | if (merge_points_compare(stack, &mp_node->stack)) { |
1200 | ERR("Merge points differ for offset %lu\n", | |
1201 | target_pc); | |
1202 | return -EINVAL; | |
1203 | } | |
bf956ec0 | 1204 | /* Once validated, we can remove the merge point */ |
04aa13f8 | 1205 | dbg_printf("Bytecode: remove merge point at offset %lu\n", |
bf956ec0 | 1206 | target_pc); |
10544ee8 | 1207 | ret = lttng_ust_lfht_del(merge_points, node); |
bf956ec0 MD |
1208 | assert(!ret); |
1209 | } | |
1210 | return 0; | |
1211 | } | |
1212 | ||
82235210 MD |
1213 | /* |
1214 | * Validate load instructions: specialized instructions not accepted as input. | |
1215 | * | |
1216 | * Return value: | |
1217 | * >0: going to next insn. | |
1218 | * 0: success, stop iteration. | |
1219 | * <0: error | |
1220 | */ | |
1221 | static | |
1222 | int validate_load(char **_next_pc, | |
1223 | char *pc) | |
1224 | { | |
1225 | int ret = 0; | |
1226 | char *next_pc = *_next_pc; | |
1227 | ||
1228 | switch (*(bytecode_opcode_t *) pc) { | |
1229 | case BYTECODE_OP_UNKNOWN: | |
1230 | default: | |
1231 | { | |
1232 | ERR("Unknown bytecode op %u\n", | |
1233 | (unsigned int) *(bytecode_opcode_t *) pc); | |
1234 | ret = -EINVAL; | |
1235 | goto end; | |
1236 | } | |
1237 | ||
1238 | case BYTECODE_OP_RETURN: | |
1239 | { | |
1240 | next_pc += sizeof(struct return_op); | |
1241 | break; | |
1242 | } | |
1243 | ||
1244 | case BYTECODE_OP_RETURN_S64: | |
1245 | { | |
1246 | next_pc += sizeof(struct return_op); | |
1247 | break; | |
1248 | } | |
1249 | ||
1250 | /* binary */ | |
1251 | case BYTECODE_OP_MUL: | |
1252 | case BYTECODE_OP_DIV: | |
1253 | case BYTECODE_OP_MOD: | |
1254 | case BYTECODE_OP_PLUS: | |
1255 | case BYTECODE_OP_MINUS: | |
1256 | { | |
1257 | ERR("Unsupported bytecode op %u\n", | |
1258 | (unsigned int) *(bytecode_opcode_t *) pc); | |
1259 | ret = -EINVAL; | |
1260 | goto end; | |
1261 | } | |
1262 | ||
1263 | case BYTECODE_OP_EQ: | |
1264 | case BYTECODE_OP_NE: | |
1265 | case BYTECODE_OP_GT: | |
1266 | case BYTECODE_OP_LT: | |
1267 | case BYTECODE_OP_GE: | |
1268 | case BYTECODE_OP_LE: | |
1269 | case BYTECODE_OP_EQ_STRING: | |
1270 | case BYTECODE_OP_NE_STRING: | |
1271 | case BYTECODE_OP_GT_STRING: | |
1272 | case BYTECODE_OP_LT_STRING: | |
1273 | case BYTECODE_OP_GE_STRING: | |
1274 | case BYTECODE_OP_LE_STRING: | |
1275 | case BYTECODE_OP_EQ_STAR_GLOB_STRING: | |
1276 | case BYTECODE_OP_NE_STAR_GLOB_STRING: | |
1277 | case BYTECODE_OP_EQ_S64: | |
1278 | case BYTECODE_OP_NE_S64: | |
1279 | case BYTECODE_OP_GT_S64: | |
1280 | case BYTECODE_OP_LT_S64: | |
1281 | case BYTECODE_OP_GE_S64: | |
1282 | case BYTECODE_OP_LE_S64: | |
1283 | case BYTECODE_OP_EQ_DOUBLE: | |
1284 | case BYTECODE_OP_NE_DOUBLE: | |
1285 | case BYTECODE_OP_GT_DOUBLE: | |
1286 | case BYTECODE_OP_LT_DOUBLE: | |
1287 | case BYTECODE_OP_GE_DOUBLE: | |
1288 | case BYTECODE_OP_LE_DOUBLE: | |
1289 | case BYTECODE_OP_EQ_DOUBLE_S64: | |
1290 | case BYTECODE_OP_NE_DOUBLE_S64: | |
1291 | case BYTECODE_OP_GT_DOUBLE_S64: | |
1292 | case BYTECODE_OP_LT_DOUBLE_S64: | |
1293 | case BYTECODE_OP_GE_DOUBLE_S64: | |
1294 | case BYTECODE_OP_LE_DOUBLE_S64: | |
1295 | case BYTECODE_OP_EQ_S64_DOUBLE: | |
1296 | case BYTECODE_OP_NE_S64_DOUBLE: | |
1297 | case BYTECODE_OP_GT_S64_DOUBLE: | |
1298 | case BYTECODE_OP_LT_S64_DOUBLE: | |
1299 | case BYTECODE_OP_GE_S64_DOUBLE: | |
1300 | case BYTECODE_OP_LE_S64_DOUBLE: | |
1301 | case BYTECODE_OP_BIT_RSHIFT: | |
1302 | case BYTECODE_OP_BIT_LSHIFT: | |
1303 | case BYTECODE_OP_BIT_AND: | |
1304 | case BYTECODE_OP_BIT_OR: | |
1305 | case BYTECODE_OP_BIT_XOR: | |
1306 | { | |
1307 | next_pc += sizeof(struct binary_op); | |
1308 | break; | |
1309 | } | |
1310 | ||
1311 | /* unary */ | |
1312 | case BYTECODE_OP_UNARY_PLUS: | |
1313 | case BYTECODE_OP_UNARY_MINUS: | |
1314 | case BYTECODE_OP_UNARY_PLUS_S64: | |
1315 | case BYTECODE_OP_UNARY_MINUS_S64: | |
1316 | case BYTECODE_OP_UNARY_NOT_S64: | |
1317 | case BYTECODE_OP_UNARY_NOT: | |
1318 | case BYTECODE_OP_UNARY_BIT_NOT: | |
1319 | case BYTECODE_OP_UNARY_PLUS_DOUBLE: | |
1320 | case BYTECODE_OP_UNARY_MINUS_DOUBLE: | |
1321 | case BYTECODE_OP_UNARY_NOT_DOUBLE: | |
1322 | { | |
1323 | next_pc += sizeof(struct unary_op); | |
1324 | break; | |
1325 | } | |
1326 | ||
1327 | /* logical */ | |
1328 | case BYTECODE_OP_AND: | |
1329 | case BYTECODE_OP_OR: | |
1330 | { | |
1331 | next_pc += sizeof(struct logical_op); | |
1332 | break; | |
1333 | } | |
1334 | ||
1335 | /* load field ref */ | |
1336 | case BYTECODE_OP_LOAD_FIELD_REF: | |
1337 | /* get context ref */ | |
1338 | case BYTECODE_OP_GET_CONTEXT_REF: | |
1339 | { | |
1340 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1341 | break; | |
1342 | } | |
1343 | case BYTECODE_OP_LOAD_FIELD_REF_STRING: | |
1344 | case BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE: | |
1345 | case BYTECODE_OP_GET_CONTEXT_REF_STRING: | |
1346 | case BYTECODE_OP_LOAD_FIELD_REF_S64: | |
1347 | case BYTECODE_OP_GET_CONTEXT_REF_S64: | |
1348 | case BYTECODE_OP_LOAD_FIELD_REF_DOUBLE: | |
1349 | case BYTECODE_OP_GET_CONTEXT_REF_DOUBLE: | |
1350 | { | |
1351 | /* | |
1352 | * Reject specialized load field ref instructions. | |
1353 | */ | |
1354 | ret = -EINVAL; | |
1355 | goto end; | |
1356 | } | |
1357 | ||
1358 | /* load from immediate operand */ | |
1359 | case BYTECODE_OP_LOAD_STRING: | |
1360 | case BYTECODE_OP_LOAD_STAR_GLOB_STRING: | |
1361 | { | |
1362 | struct load_op *insn = (struct load_op *) pc; | |
1363 | ||
1364 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1365 | break; | |
1366 | } | |
1367 | ||
1368 | case BYTECODE_OP_LOAD_S64: | |
1369 | { | |
1370 | next_pc += sizeof(struct load_op) + sizeof(struct literal_numeric); | |
1371 | break; | |
1372 | } | |
1373 | case BYTECODE_OP_LOAD_DOUBLE: | |
1374 | { | |
1375 | next_pc += sizeof(struct load_op) + sizeof(struct literal_double); | |
1376 | break; | |
1377 | } | |
1378 | ||
1379 | case BYTECODE_OP_CAST_DOUBLE_TO_S64: | |
1380 | case BYTECODE_OP_CAST_TO_S64: | |
1381 | case BYTECODE_OP_CAST_NOP: | |
1382 | { | |
1383 | next_pc += sizeof(struct cast_op); | |
1384 | break; | |
1385 | } | |
1386 | ||
1387 | /* | |
1388 | * Instructions for recursive traversal through composed types. | |
1389 | */ | |
1390 | case BYTECODE_OP_GET_CONTEXT_ROOT: | |
1391 | case BYTECODE_OP_GET_APP_CONTEXT_ROOT: | |
1392 | case BYTECODE_OP_GET_PAYLOAD_ROOT: | |
1393 | case BYTECODE_OP_LOAD_FIELD: | |
1394 | { | |
1395 | next_pc += sizeof(struct load_op); | |
1396 | break; | |
1397 | } | |
1398 | ||
1399 | case BYTECODE_OP_LOAD_FIELD_S8: | |
1400 | case BYTECODE_OP_LOAD_FIELD_S16: | |
1401 | case BYTECODE_OP_LOAD_FIELD_S32: | |
1402 | case BYTECODE_OP_LOAD_FIELD_S64: | |
1403 | case BYTECODE_OP_LOAD_FIELD_U8: | |
1404 | case BYTECODE_OP_LOAD_FIELD_U16: | |
1405 | case BYTECODE_OP_LOAD_FIELD_U32: | |
1406 | case BYTECODE_OP_LOAD_FIELD_U64: | |
1407 | case BYTECODE_OP_LOAD_FIELD_STRING: | |
1408 | case BYTECODE_OP_LOAD_FIELD_SEQUENCE: | |
1409 | case BYTECODE_OP_LOAD_FIELD_DOUBLE: | |
1410 | { | |
1411 | /* | |
1412 | * Reject specialized load field instructions. | |
1413 | */ | |
1414 | ret = -EINVAL; | |
1415 | goto end; | |
1416 | } | |
1417 | ||
1418 | case BYTECODE_OP_GET_SYMBOL: | |
1419 | case BYTECODE_OP_GET_SYMBOL_FIELD: | |
1420 | { | |
1421 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1422 | break; | |
1423 | } | |
1424 | ||
1425 | case BYTECODE_OP_GET_INDEX_U16: | |
1426 | { | |
1427 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); | |
1428 | break; | |
1429 | } | |
1430 | ||
1431 | case BYTECODE_OP_GET_INDEX_U64: | |
1432 | { | |
1433 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); | |
1434 | break; | |
1435 | } | |
1436 | ||
1437 | } | |
1438 | end: | |
1439 | *_next_pc = next_pc; | |
1440 | return ret; | |
1441 | } | |
1442 | ||
bf956ec0 MD |
1443 | /* |
1444 | * Return value: | |
1445 | * >0: going to next insn. | |
1446 | * 0: success, stop iteration. | |
1447 | * <0: error | |
1448 | */ | |
1449 | static | |
2208d8b5 | 1450 | int exec_insn(struct bytecode_runtime *bytecode __attribute__((unused)), |
10544ee8 | 1451 | struct lttng_ust_lfht *merge_points, |
0305960f | 1452 | struct vstack *stack, |
22389ecb MD |
1453 | char **_next_pc, |
1454 | char *pc) | |
bf956ec0 MD |
1455 | { |
1456 | int ret = 1; | |
22389ecb | 1457 | char *next_pc = *_next_pc; |
bf956ec0 | 1458 | |
04aa13f8 FD |
1459 | switch (*(bytecode_opcode_t *) pc) { |
1460 | case BYTECODE_OP_UNKNOWN: | |
bf956ec0 MD |
1461 | default: |
1462 | { | |
1463 | ERR("unknown bytecode op %u\n", | |
04aa13f8 | 1464 | (unsigned int) *(bytecode_opcode_t *) pc); |
bf956ec0 MD |
1465 | ret = -EINVAL; |
1466 | goto end; | |
1467 | } | |
1468 | ||
04aa13f8 | 1469 | case BYTECODE_OP_RETURN: |
bf956ec0 | 1470 | { |
71c1ceeb MD |
1471 | if (!vstack_ax(stack)) { |
1472 | ERR("Empty stack\n"); | |
1473 | ret = -EINVAL; | |
1474 | goto end; | |
1475 | } | |
47e5f13e MD |
1476 | switch (vstack_ax(stack)->type) { |
1477 | case REG_S64: | |
d97f9b78 | 1478 | case REG_U64: |
09f78acb FD |
1479 | case REG_DOUBLE: |
1480 | case REG_STRING: | |
1481 | case REG_PTR: | |
47e5f13e MD |
1482 | case REG_UNKNOWN: |
1483 | break; | |
1484 | default: | |
1485 | ERR("Unexpected register type %d at end of bytecode\n", | |
1486 | (int) vstack_ax(stack)->type); | |
1487 | ret = -EINVAL; | |
1488 | goto end; | |
1489 | } | |
1490 | ||
bf956ec0 MD |
1491 | ret = 0; |
1492 | goto end; | |
1493 | } | |
04aa13f8 | 1494 | case BYTECODE_OP_RETURN_S64: |
93c591bb MD |
1495 | { |
1496 | if (!vstack_ax(stack)) { | |
1497 | ERR("Empty stack\n"); | |
1498 | ret = -EINVAL; | |
1499 | goto end; | |
1500 | } | |
1501 | switch (vstack_ax(stack)->type) { | |
1502 | case REG_S64: | |
d97f9b78 | 1503 | case REG_U64: |
93c591bb MD |
1504 | break; |
1505 | default: | |
1506 | case REG_UNKNOWN: | |
1507 | ERR("Unexpected register type %d at end of bytecode\n", | |
1508 | (int) vstack_ax(stack)->type); | |
1509 | ret = -EINVAL; | |
1510 | goto end; | |
1511 | } | |
1512 | ||
1513 | ret = 0; | |
1514 | goto end; | |
1515 | } | |
bf956ec0 MD |
1516 | |
1517 | /* binary */ | |
04aa13f8 FD |
1518 | case BYTECODE_OP_MUL: |
1519 | case BYTECODE_OP_DIV: | |
1520 | case BYTECODE_OP_MOD: | |
1521 | case BYTECODE_OP_PLUS: | |
1522 | case BYTECODE_OP_MINUS: | |
bf956ec0 MD |
1523 | { |
1524 | ERR("unsupported bytecode op %u\n", | |
04aa13f8 | 1525 | (unsigned int) *(bytecode_opcode_t *) pc); |
bf956ec0 MD |
1526 | ret = -EINVAL; |
1527 | goto end; | |
1528 | } | |
1529 | ||
04aa13f8 FD |
1530 | case BYTECODE_OP_EQ: |
1531 | case BYTECODE_OP_NE: | |
1532 | case BYTECODE_OP_GT: | |
1533 | case BYTECODE_OP_LT: | |
1534 | case BYTECODE_OP_GE: | |
1535 | case BYTECODE_OP_LE: | |
1536 | case BYTECODE_OP_EQ_STRING: | |
1537 | case BYTECODE_OP_NE_STRING: | |
1538 | case BYTECODE_OP_GT_STRING: | |
1539 | case BYTECODE_OP_LT_STRING: | |
1540 | case BYTECODE_OP_GE_STRING: | |
1541 | case BYTECODE_OP_LE_STRING: | |
1542 | case BYTECODE_OP_EQ_STAR_GLOB_STRING: | |
1543 | case BYTECODE_OP_NE_STAR_GLOB_STRING: | |
1544 | case BYTECODE_OP_EQ_S64: | |
1545 | case BYTECODE_OP_NE_S64: | |
1546 | case BYTECODE_OP_GT_S64: | |
1547 | case BYTECODE_OP_LT_S64: | |
1548 | case BYTECODE_OP_GE_S64: | |
1549 | case BYTECODE_OP_LE_S64: | |
1550 | case BYTECODE_OP_EQ_DOUBLE: | |
1551 | case BYTECODE_OP_NE_DOUBLE: | |
1552 | case BYTECODE_OP_GT_DOUBLE: | |
1553 | case BYTECODE_OP_LT_DOUBLE: | |
1554 | case BYTECODE_OP_GE_DOUBLE: | |
1555 | case BYTECODE_OP_LE_DOUBLE: | |
1556 | case BYTECODE_OP_EQ_DOUBLE_S64: | |
1557 | case BYTECODE_OP_NE_DOUBLE_S64: | |
1558 | case BYTECODE_OP_GT_DOUBLE_S64: | |
1559 | case BYTECODE_OP_LT_DOUBLE_S64: | |
1560 | case BYTECODE_OP_GE_DOUBLE_S64: | |
1561 | case BYTECODE_OP_LE_DOUBLE_S64: | |
1562 | case BYTECODE_OP_EQ_S64_DOUBLE: | |
1563 | case BYTECODE_OP_NE_S64_DOUBLE: | |
1564 | case BYTECODE_OP_GT_S64_DOUBLE: | |
1565 | case BYTECODE_OP_LT_S64_DOUBLE: | |
1566 | case BYTECODE_OP_GE_S64_DOUBLE: | |
1567 | case BYTECODE_OP_LE_S64_DOUBLE: | |
d97f9b78 MD |
1568 | { |
1569 | /* Pop 2, push 1 */ | |
1570 | if (vstack_pop(stack)) { | |
1571 | ret = -EINVAL; | |
1572 | goto end; | |
1573 | } | |
1574 | if (!vstack_ax(stack)) { | |
1575 | ERR("Empty stack\n"); | |
1576 | ret = -EINVAL; | |
1577 | goto end; | |
1578 | } | |
1579 | switch (vstack_ax(stack)->type) { | |
1580 | case REG_S64: | |
1581 | case REG_U64: | |
1582 | case REG_DOUBLE: | |
1583 | case REG_STRING: | |
1584 | case REG_STAR_GLOB_STRING: | |
1585 | case REG_UNKNOWN: | |
1586 | break; | |
1587 | default: | |
1588 | ERR("Unexpected register type %d for operation\n", | |
1589 | (int) vstack_ax(stack)->type); | |
1590 | ret = -EINVAL; | |
1591 | goto end; | |
1592 | } | |
1593 | ||
1594 | vstack_ax(stack)->type = REG_S64; | |
1595 | next_pc += sizeof(struct binary_op); | |
1596 | break; | |
1597 | } | |
1598 | ||
04aa13f8 FD |
1599 | case BYTECODE_OP_BIT_RSHIFT: |
1600 | case BYTECODE_OP_BIT_LSHIFT: | |
1601 | case BYTECODE_OP_BIT_AND: | |
1602 | case BYTECODE_OP_BIT_OR: | |
1603 | case BYTECODE_OP_BIT_XOR: | |
bf956ec0 | 1604 | { |
0305960f MD |
1605 | /* Pop 2, push 1 */ |
1606 | if (vstack_pop(stack)) { | |
1607 | ret = -EINVAL; | |
1608 | goto end; | |
1609 | } | |
1610 | if (!vstack_ax(stack)) { | |
1611 | ERR("Empty stack\n"); | |
1612 | ret = -EINVAL; | |
1613 | goto end; | |
1614 | } | |
47e5f13e MD |
1615 | switch (vstack_ax(stack)->type) { |
1616 | case REG_S64: | |
d97f9b78 | 1617 | case REG_U64: |
47e5f13e MD |
1618 | case REG_DOUBLE: |
1619 | case REG_STRING: | |
1620 | case REG_STAR_GLOB_STRING: | |
1621 | case REG_UNKNOWN: | |
1622 | break; | |
1623 | default: | |
1624 | ERR("Unexpected register type %d for operation\n", | |
1625 | (int) vstack_ax(stack)->type); | |
1626 | ret = -EINVAL; | |
1627 | goto end; | |
1628 | } | |
1629 | ||
d97f9b78 | 1630 | vstack_ax(stack)->type = REG_U64; |
bf956ec0 MD |
1631 | next_pc += sizeof(struct binary_op); |
1632 | break; | |
1633 | } | |
1634 | ||
1635 | /* unary */ | |
04aa13f8 FD |
1636 | case BYTECODE_OP_UNARY_PLUS: |
1637 | case BYTECODE_OP_UNARY_MINUS: | |
53569322 MD |
1638 | { |
1639 | /* Pop 1, push 1 */ | |
1640 | if (!vstack_ax(stack)) { | |
1641 | ERR("Empty stack\n"); | |
1642 | ret = -EINVAL; | |
1643 | goto end; | |
1644 | } | |
47e5f13e MD |
1645 | switch (vstack_ax(stack)->type) { |
1646 | case REG_UNKNOWN: | |
1647 | case REG_DOUBLE: | |
1648 | case REG_S64: | |
d97f9b78 | 1649 | case REG_U64: |
47e5f13e MD |
1650 | break; |
1651 | default: | |
1652 | ERR("Unexpected register type %d for operation\n", | |
1653 | (int) vstack_ax(stack)->type); | |
1654 | ret = -EINVAL; | |
1655 | goto end; | |
1656 | } | |
53569322 MD |
1657 | vstack_ax(stack)->type = REG_UNKNOWN; |
1658 | next_pc += sizeof(struct unary_op); | |
1659 | break; | |
1660 | } | |
1661 | ||
04aa13f8 FD |
1662 | case BYTECODE_OP_UNARY_PLUS_S64: |
1663 | case BYTECODE_OP_UNARY_MINUS_S64: | |
1664 | case BYTECODE_OP_UNARY_NOT_S64: | |
47e5f13e MD |
1665 | { |
1666 | /* Pop 1, push 1 */ | |
1667 | if (!vstack_ax(stack)) { | |
1668 | ERR("Empty stack\n"); | |
1669 | ret = -EINVAL; | |
1670 | goto end; | |
1671 | } | |
1672 | switch (vstack_ax(stack)->type) { | |
1673 | case REG_S64: | |
d97f9b78 | 1674 | case REG_U64: |
47e5f13e MD |
1675 | break; |
1676 | default: | |
1677 | ERR("Unexpected register type %d for operation\n", | |
1678 | (int) vstack_ax(stack)->type); | |
1679 | ret = -EINVAL; | |
1680 | goto end; | |
1681 | } | |
1682 | ||
47e5f13e MD |
1683 | next_pc += sizeof(struct unary_op); |
1684 | break; | |
1685 | } | |
1686 | ||
04aa13f8 | 1687 | case BYTECODE_OP_UNARY_NOT: |
47e5f13e MD |
1688 | { |
1689 | /* Pop 1, push 1 */ | |
1690 | if (!vstack_ax(stack)) { | |
1691 | ERR("Empty stack\n"); | |
1692 | ret = -EINVAL; | |
1693 | goto end; | |
1694 | } | |
1695 | switch (vstack_ax(stack)->type) { | |
1696 | case REG_UNKNOWN: | |
1697 | case REG_DOUBLE: | |
1698 | case REG_S64: | |
d97f9b78 | 1699 | case REG_U64: |
47e5f13e MD |
1700 | break; |
1701 | default: | |
1702 | ERR("Unexpected register type %d for operation\n", | |
1703 | (int) vstack_ax(stack)->type); | |
1704 | ret = -EINVAL; | |
1705 | goto end; | |
1706 | } | |
1707 | ||
47e5f13e MD |
1708 | next_pc += sizeof(struct unary_op); |
1709 | break; | |
1710 | } | |
1711 | ||
04aa13f8 | 1712 | case BYTECODE_OP_UNARY_BIT_NOT: |
0039e2d8 MD |
1713 | { |
1714 | /* Pop 1, push 1 */ | |
1715 | if (!vstack_ax(stack)) { | |
1716 | ERR("Empty stack\n"); | |
1717 | ret = -EINVAL; | |
1718 | goto end; | |
1719 | } | |
1720 | switch (vstack_ax(stack)->type) { | |
1721 | case REG_UNKNOWN: | |
1722 | case REG_S64: | |
d97f9b78 | 1723 | case REG_U64: |
0039e2d8 MD |
1724 | break; |
1725 | case REG_DOUBLE: | |
1726 | default: | |
1727 | ERR("Unexpected register type %d for operation\n", | |
1728 | (int) vstack_ax(stack)->type); | |
1729 | ret = -EINVAL; | |
1730 | goto end; | |
1731 | } | |
1732 | ||
d97f9b78 | 1733 | vstack_ax(stack)->type = REG_U64; |
0039e2d8 MD |
1734 | next_pc += sizeof(struct unary_op); |
1735 | break; | |
1736 | } | |
1737 | ||
04aa13f8 | 1738 | case BYTECODE_OP_UNARY_NOT_DOUBLE: |
bf956ec0 | 1739 | { |
0305960f MD |
1740 | /* Pop 1, push 1 */ |
1741 | if (!vstack_ax(stack)) { | |
1742 | ERR("Empty stack\n"); | |
1743 | ret = -EINVAL; | |
1744 | goto end; | |
1745 | } | |
47e5f13e MD |
1746 | switch (vstack_ax(stack)->type) { |
1747 | case REG_DOUBLE: | |
1748 | break; | |
1749 | default: | |
1750 | ERR("Incorrect register type %d for operation\n", | |
1751 | (int) vstack_ax(stack)->type); | |
1752 | ret = -EINVAL; | |
1753 | goto end; | |
1754 | } | |
1755 | ||
0305960f | 1756 | vstack_ax(stack)->type = REG_S64; |
bf956ec0 MD |
1757 | next_pc += sizeof(struct unary_op); |
1758 | break; | |
1759 | } | |
1760 | ||
04aa13f8 FD |
1761 | case BYTECODE_OP_UNARY_PLUS_DOUBLE: |
1762 | case BYTECODE_OP_UNARY_MINUS_DOUBLE: | |
bf956ec0 | 1763 | { |
0305960f MD |
1764 | /* Pop 1, push 1 */ |
1765 | if (!vstack_ax(stack)) { | |
1766 | ERR("Empty stack\n"); | |
1767 | ret = -EINVAL; | |
1768 | goto end; | |
1769 | } | |
47e5f13e MD |
1770 | switch (vstack_ax(stack)->type) { |
1771 | case REG_DOUBLE: | |
1772 | break; | |
1773 | default: | |
1774 | ERR("Incorrect register type %d for operation\n", | |
1775 | (int) vstack_ax(stack)->type); | |
1776 | ret = -EINVAL; | |
1777 | goto end; | |
1778 | } | |
1779 | ||
0305960f | 1780 | vstack_ax(stack)->type = REG_DOUBLE; |
bf956ec0 MD |
1781 | next_pc += sizeof(struct unary_op); |
1782 | break; | |
1783 | } | |
1784 | ||
1785 | /* logical */ | |
04aa13f8 FD |
1786 | case BYTECODE_OP_AND: |
1787 | case BYTECODE_OP_OR: | |
bf956ec0 MD |
1788 | { |
1789 | struct logical_op *insn = (struct logical_op *) pc; | |
1790 | int merge_ret; | |
1791 | ||
1792 | /* Add merge point to table */ | |
71c1ceeb MD |
1793 | merge_ret = merge_point_add_check(merge_points, |
1794 | insn->skip_offset, stack); | |
bf956ec0 MD |
1795 | if (merge_ret) { |
1796 | ret = merge_ret; | |
1797 | goto end; | |
97b58163 | 1798 | } |
47e5f13e MD |
1799 | |
1800 | if (!vstack_ax(stack)) { | |
1801 | ERR("Empty stack\n"); | |
1802 | ret = -EINVAL; | |
1803 | goto end; | |
1804 | } | |
1805 | /* There is always a cast-to-s64 operation before a or/and op. */ | |
1806 | switch (vstack_ax(stack)->type) { | |
1807 | case REG_S64: | |
d97f9b78 | 1808 | case REG_U64: |
47e5f13e MD |
1809 | break; |
1810 | default: | |
1811 | ERR("Incorrect register type %d for operation\n", | |
1812 | (int) vstack_ax(stack)->type); | |
1813 | ret = -EINVAL; | |
1814 | goto end; | |
1815 | } | |
1816 | ||
bf956ec0 | 1817 | /* Continue to next instruction */ |
71c1ceeb MD |
1818 | /* Pop 1 when jump not taken */ |
1819 | if (vstack_pop(stack)) { | |
1820 | ret = -EINVAL; | |
1821 | goto end; | |
1822 | } | |
bf956ec0 MD |
1823 | next_pc += sizeof(struct logical_op); |
1824 | break; | |
1825 | } | |
1826 | ||
77aa5901 | 1827 | /* load field ref */ |
04aa13f8 | 1828 | case BYTECODE_OP_LOAD_FIELD_REF: |
bf956ec0 MD |
1829 | { |
1830 | ERR("Unknown field ref type\n"); | |
1831 | ret = -EINVAL; | |
1832 | goto end; | |
1833 | } | |
77aa5901 | 1834 | /* get context ref */ |
04aa13f8 | 1835 | case BYTECODE_OP_GET_CONTEXT_REF: |
77aa5901 | 1836 | { |
53569322 MD |
1837 | if (vstack_push(stack)) { |
1838 | ret = -EINVAL; | |
1839 | goto end; | |
1840 | } | |
1841 | vstack_ax(stack)->type = REG_UNKNOWN; | |
1842 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1843 | break; | |
77aa5901 | 1844 | } |
04aa13f8 FD |
1845 | case BYTECODE_OP_LOAD_FIELD_REF_STRING: |
1846 | case BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE: | |
1847 | case BYTECODE_OP_GET_CONTEXT_REF_STRING: | |
bf956ec0 | 1848 | { |
0305960f MD |
1849 | if (vstack_push(stack)) { |
1850 | ret = -EINVAL; | |
1851 | goto end; | |
1852 | } | |
1853 | vstack_ax(stack)->type = REG_STRING; | |
bf956ec0 MD |
1854 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1855 | break; | |
1856 | } | |
04aa13f8 FD |
1857 | case BYTECODE_OP_LOAD_FIELD_REF_S64: |
1858 | case BYTECODE_OP_GET_CONTEXT_REF_S64: | |
bf956ec0 | 1859 | { |
0305960f MD |
1860 | if (vstack_push(stack)) { |
1861 | ret = -EINVAL; | |
1862 | goto end; | |
1863 | } | |
1864 | vstack_ax(stack)->type = REG_S64; | |
bf956ec0 MD |
1865 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1866 | break; | |
1867 | } | |
04aa13f8 FD |
1868 | case BYTECODE_OP_LOAD_FIELD_REF_DOUBLE: |
1869 | case BYTECODE_OP_GET_CONTEXT_REF_DOUBLE: | |
bf956ec0 | 1870 | { |
0305960f MD |
1871 | if (vstack_push(stack)) { |
1872 | ret = -EINVAL; | |
1873 | goto end; | |
1874 | } | |
1875 | vstack_ax(stack)->type = REG_DOUBLE; | |
bf956ec0 MD |
1876 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1877 | break; | |
1878 | } | |
1879 | ||
77aa5901 | 1880 | /* load from immediate operand */ |
04aa13f8 | 1881 | case BYTECODE_OP_LOAD_STRING: |
bf956ec0 MD |
1882 | { |
1883 | struct load_op *insn = (struct load_op *) pc; | |
1884 | ||
0305960f MD |
1885 | if (vstack_push(stack)) { |
1886 | ret = -EINVAL; | |
1887 | goto end; | |
1888 | } | |
1889 | vstack_ax(stack)->type = REG_STRING; | |
bf956ec0 MD |
1890 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
1891 | break; | |
1892 | } | |
1893 | ||
04aa13f8 | 1894 | case BYTECODE_OP_LOAD_STAR_GLOB_STRING: |
3151a51d PP |
1895 | { |
1896 | struct load_op *insn = (struct load_op *) pc; | |
1897 | ||
1898 | if (vstack_push(stack)) { | |
1899 | ret = -EINVAL; | |
1900 | goto end; | |
1901 | } | |
1902 | vstack_ax(stack)->type = REG_STAR_GLOB_STRING; | |
1903 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1904 | break; | |
1905 | } | |
1906 | ||
04aa13f8 | 1907 | case BYTECODE_OP_LOAD_S64: |
bf956ec0 | 1908 | { |
0305960f MD |
1909 | if (vstack_push(stack)) { |
1910 | ret = -EINVAL; | |
1911 | goto end; | |
1912 | } | |
1913 | vstack_ax(stack)->type = REG_S64; | |
bf956ec0 MD |
1914 | next_pc += sizeof(struct load_op) |
1915 | + sizeof(struct literal_numeric); | |
1916 | break; | |
1917 | } | |
1918 | ||
04aa13f8 | 1919 | case BYTECODE_OP_LOAD_DOUBLE: |
bf956ec0 | 1920 | { |
0305960f MD |
1921 | if (vstack_push(stack)) { |
1922 | ret = -EINVAL; | |
1923 | goto end; | |
1924 | } | |
1925 | vstack_ax(stack)->type = REG_DOUBLE; | |
bf956ec0 MD |
1926 | next_pc += sizeof(struct load_op) |
1927 | + sizeof(struct literal_double); | |
1928 | break; | |
1929 | } | |
1930 | ||
04aa13f8 FD |
1931 | case BYTECODE_OP_CAST_TO_S64: |
1932 | case BYTECODE_OP_CAST_DOUBLE_TO_S64: | |
bf956ec0 | 1933 | { |
0305960f MD |
1934 | /* Pop 1, push 1 */ |
1935 | if (!vstack_ax(stack)) { | |
1936 | ERR("Empty stack\n"); | |
1937 | ret = -EINVAL; | |
1938 | goto end; | |
1939 | } | |
47e5f13e MD |
1940 | switch (vstack_ax(stack)->type) { |
1941 | case REG_S64: | |
d97f9b78 | 1942 | case REG_U64: |
47e5f13e MD |
1943 | case REG_DOUBLE: |
1944 | case REG_UNKNOWN: | |
1945 | break; | |
1946 | default: | |
1947 | ERR("Incorrect register type %d for cast\n", | |
1948 | (int) vstack_ax(stack)->type); | |
1949 | ret = -EINVAL; | |
1950 | goto end; | |
1951 | } | |
0305960f | 1952 | vstack_ax(stack)->type = REG_S64; |
bf956ec0 MD |
1953 | next_pc += sizeof(struct cast_op); |
1954 | break; | |
1955 | } | |
04aa13f8 | 1956 | case BYTECODE_OP_CAST_NOP: |
bf956ec0 MD |
1957 | { |
1958 | next_pc += sizeof(struct cast_op); | |
1959 | break; | |
1960 | } | |
97b58163 | 1961 | |
47e5f13e MD |
1962 | /* |
1963 | * Instructions for recursive traversal through composed types. | |
1964 | */ | |
04aa13f8 FD |
1965 | case BYTECODE_OP_GET_CONTEXT_ROOT: |
1966 | case BYTECODE_OP_GET_APP_CONTEXT_ROOT: | |
1967 | case BYTECODE_OP_GET_PAYLOAD_ROOT: | |
47e5f13e MD |
1968 | { |
1969 | if (vstack_push(stack)) { | |
1970 | ret = -EINVAL; | |
1971 | goto end; | |
1972 | } | |
1973 | vstack_ax(stack)->type = REG_PTR; | |
1974 | next_pc += sizeof(struct load_op); | |
1975 | break; | |
1976 | } | |
1977 | ||
04aa13f8 | 1978 | case BYTECODE_OP_LOAD_FIELD: |
47e5f13e MD |
1979 | { |
1980 | /* Pop 1, push 1 */ | |
1981 | if (!vstack_ax(stack)) { | |
1982 | ERR("Empty stack\n"); | |
1983 | ret = -EINVAL; | |
1984 | goto end; | |
1985 | } | |
1986 | if (vstack_ax(stack)->type != REG_PTR) { | |
1987 | ERR("Expecting pointer on top of stack\n"); | |
1988 | ret = -EINVAL; | |
1989 | goto end; | |
1990 | } | |
1991 | vstack_ax(stack)->type = REG_UNKNOWN; | |
1992 | next_pc += sizeof(struct load_op); | |
1993 | break; | |
1994 | } | |
1995 | ||
04aa13f8 FD |
1996 | case BYTECODE_OP_LOAD_FIELD_S8: |
1997 | case BYTECODE_OP_LOAD_FIELD_S16: | |
1998 | case BYTECODE_OP_LOAD_FIELD_S32: | |
1999 | case BYTECODE_OP_LOAD_FIELD_S64: | |
d97f9b78 MD |
2000 | { |
2001 | /* Pop 1, push 1 */ | |
2002 | if (!vstack_ax(stack)) { | |
2003 | ERR("Empty stack\n"); | |
2004 | ret = -EINVAL; | |
2005 | goto end; | |
2006 | } | |
2007 | if (vstack_ax(stack)->type != REG_PTR) { | |
2008 | ERR("Expecting pointer on top of stack\n"); | |
2009 | ret = -EINVAL; | |
2010 | goto end; | |
2011 | } | |
2012 | vstack_ax(stack)->type = REG_S64; | |
2013 | next_pc += sizeof(struct load_op); | |
2014 | break; | |
2015 | } | |
2016 | ||
04aa13f8 FD |
2017 | case BYTECODE_OP_LOAD_FIELD_U8: |
2018 | case BYTECODE_OP_LOAD_FIELD_U16: | |
2019 | case BYTECODE_OP_LOAD_FIELD_U32: | |
2020 | case BYTECODE_OP_LOAD_FIELD_U64: | |
47e5f13e MD |
2021 | { |
2022 | /* Pop 1, push 1 */ | |
2023 | if (!vstack_ax(stack)) { | |
2024 | ERR("Empty stack\n"); | |
2025 | ret = -EINVAL; | |
2026 | goto end; | |
2027 | } | |
2028 | if (vstack_ax(stack)->type != REG_PTR) { | |
2029 | ERR("Expecting pointer on top of stack\n"); | |
2030 | ret = -EINVAL; | |
2031 | goto end; | |
2032 | } | |
d97f9b78 | 2033 | vstack_ax(stack)->type = REG_U64; |
47e5f13e MD |
2034 | next_pc += sizeof(struct load_op); |
2035 | break; | |
2036 | } | |
2037 | ||
04aa13f8 FD |
2038 | case BYTECODE_OP_LOAD_FIELD_STRING: |
2039 | case BYTECODE_OP_LOAD_FIELD_SEQUENCE: | |
47e5f13e MD |
2040 | { |
2041 | /* Pop 1, push 1 */ | |
2042 | if (!vstack_ax(stack)) { | |
2043 | ERR("Empty stack\n"); | |
2044 | ret = -EINVAL; | |
2045 | goto end; | |
2046 | } | |
2047 | if (vstack_ax(stack)->type != REG_PTR) { | |
2048 | ERR("Expecting pointer on top of stack\n"); | |
2049 | ret = -EINVAL; | |
2050 | goto end; | |
2051 | } | |
2052 | vstack_ax(stack)->type = REG_STRING; | |
2053 | next_pc += sizeof(struct load_op); | |
2054 | break; | |
2055 | } | |
2056 | ||
04aa13f8 | 2057 | case BYTECODE_OP_LOAD_FIELD_DOUBLE: |
47e5f13e MD |
2058 | { |
2059 | /* Pop 1, push 1 */ | |
2060 | if (!vstack_ax(stack)) { | |
2061 | ERR("Empty stack\n"); | |
2062 | ret = -EINVAL; | |
2063 | goto end; | |
2064 | } | |
2065 | if (vstack_ax(stack)->type != REG_PTR) { | |
2066 | ERR("Expecting pointer on top of stack\n"); | |
2067 | ret = -EINVAL; | |
2068 | goto end; | |
2069 | } | |
2070 | vstack_ax(stack)->type = REG_DOUBLE; | |
2071 | next_pc += sizeof(struct load_op); | |
2072 | break; | |
2073 | } | |
2074 | ||
04aa13f8 FD |
2075 | case BYTECODE_OP_GET_SYMBOL: |
2076 | case BYTECODE_OP_GET_SYMBOL_FIELD: | |
47e5f13e MD |
2077 | { |
2078 | /* Pop 1, push 1 */ | |
2079 | if (!vstack_ax(stack)) { | |
2080 | ERR("Empty stack\n"); | |
2081 | ret = -EINVAL; | |
2082 | goto end; | |
2083 | } | |
2084 | if (vstack_ax(stack)->type != REG_PTR) { | |
2085 | ERR("Expecting pointer on top of stack\n"); | |
2086 | ret = -EINVAL; | |
2087 | goto end; | |
2088 | } | |
2089 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
2090 | break; | |
2091 | } | |
2092 | ||
04aa13f8 | 2093 | case BYTECODE_OP_GET_INDEX_U16: |
47e5f13e MD |
2094 | { |
2095 | /* Pop 1, push 1 */ | |
2096 | if (!vstack_ax(stack)) { | |
2097 | ERR("Empty stack\n"); | |
2098 | ret = -EINVAL; | |
2099 | goto end; | |
2100 | } | |
2101 | if (vstack_ax(stack)->type != REG_PTR) { | |
2102 | ERR("Expecting pointer on top of stack\n"); | |
2103 | ret = -EINVAL; | |
2104 | goto end; | |
2105 | } | |
2106 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); | |
2107 | break; | |
2108 | } | |
2109 | ||
04aa13f8 | 2110 | case BYTECODE_OP_GET_INDEX_U64: |
47e5f13e MD |
2111 | { |
2112 | /* Pop 1, push 1 */ | |
2113 | if (!vstack_ax(stack)) { | |
2114 | ERR("Empty stack\n"); | |
2115 | ret = -EINVAL; | |
2116 | goto end; | |
2117 | } | |
2118 | if (vstack_ax(stack)->type != REG_PTR) { | |
2119 | ERR("Expecting pointer on top of stack\n"); | |
2120 | ret = -EINVAL; | |
2121 | goto end; | |
2122 | } | |
2123 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); | |
2124 | break; | |
2125 | } | |
2126 | ||
bf956ec0 MD |
2127 | } |
2128 | end: | |
2129 | *_next_pc = next_pc; | |
2130 | return ret; | |
2131 | } | |
2132 | ||
82235210 MD |
2133 | int lttng_bytecode_validate_load(struct bytecode_runtime *bytecode) |
2134 | { | |
2135 | char *pc, *next_pc, *start_pc; | |
2136 | int ret = -EINVAL; | |
2137 | ||
2138 | start_pc = &bytecode->code[0]; | |
2139 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; | |
2140 | pc = next_pc) { | |
2141 | ret = bytecode_validate_overflow(bytecode, start_pc, pc); | |
2142 | if (ret != 0) { | |
2143 | if (ret == -ERANGE) | |
2144 | ERR("Bytecode overflow\n"); | |
2145 | goto end; | |
2146 | } | |
2147 | dbg_printf("Validating loads: op %s (%u)\n", | |
2148 | lttng_bytecode_print_op((unsigned int) *(bytecode_opcode_t *) pc), | |
2149 | (unsigned int) *(bytecode_opcode_t *) pc); | |
2150 | ||
2151 | ret = validate_load(&next_pc, pc); | |
2152 | if (ret) | |
2153 | goto end; | |
2154 | } | |
2155 | end: | |
2156 | return ret; | |
2157 | } | |
2158 | ||
bf956ec0 MD |
2159 | /* |
2160 | * Never called concurrently (hash seed is shared). | |
2161 | */ | |
04aa13f8 | 2162 | int lttng_bytecode_validate(struct bytecode_runtime *bytecode) |
bf956ec0 | 2163 | { |
10544ee8 | 2164 | struct lttng_ust_lfht *merge_points; |
22389ecb | 2165 | char *pc, *next_pc, *start_pc; |
bf956ec0 | 2166 | int ret = -EINVAL; |
0305960f | 2167 | struct vstack stack; |
bf956ec0 | 2168 | |
0305960f | 2169 | vstack_init(&stack); |
bf956ec0 MD |
2170 | |
2171 | if (!lttng_hash_seed_ready) { | |
2172 | lttng_hash_seed = time(NULL); | |
2173 | lttng_hash_seed_ready = 1; | |
2174 | } | |
2175 | /* | |
2176 | * Note: merge_points hash table used by single thread, and | |
2177 | * never concurrently resized. Therefore, we can use it without | |
2178 | * holding RCU read-side lock and free nodes without using | |
2179 | * call_rcu. | |
2180 | */ | |
10544ee8 | 2181 | merge_points = lttng_ust_lfht_new(DEFAULT_NR_MERGE_POINTS, |
bf956ec0 MD |
2182 | MIN_NR_BUCKETS, MAX_NR_BUCKETS, |
2183 | 0, NULL); | |
2184 | if (!merge_points) { | |
2185 | ERR("Error allocating hash table for bytecode validation\n"); | |
2186 | return -ENOMEM; | |
2187 | } | |
47e5f13e | 2188 | start_pc = &bytecode->code[0]; |
bf956ec0 MD |
2189 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; |
2190 | pc = next_pc) { | |
82513dbe MD |
2191 | ret = bytecode_validate_overflow(bytecode, start_pc, pc); |
2192 | if (ret != 0) { | |
2193 | if (ret == -ERANGE) | |
04aa13f8 | 2194 | ERR("Bytecode overflow\n"); |
bf956ec0 | 2195 | goto end; |
97b58163 | 2196 | } |
bf956ec0 | 2197 | dbg_printf("Validating op %s (%u)\n", |
bf617e20 | 2198 | lttng_bytecode_print_op((unsigned int) *(bytecode_opcode_t *) pc), |
04aa13f8 | 2199 | (unsigned int) *(bytecode_opcode_t *) pc); |
bf956ec0 MD |
2200 | |
2201 | /* | |
2202 | * For each instruction, validate the current context | |
2203 | * (traversal of entire execution flow), and validate | |
53569322 | 2204 | * all merge points targeting this instruction. |
bf956ec0 MD |
2205 | */ |
2206 | ret = validate_instruction_all_contexts(bytecode, merge_points, | |
0305960f | 2207 | &stack, start_pc, pc); |
bf956ec0 MD |
2208 | if (ret) |
2209 | goto end; | |
0305960f | 2210 | ret = exec_insn(bytecode, merge_points, &stack, &next_pc, pc); |
bf956ec0 MD |
2211 | if (ret <= 0) |
2212 | goto end; | |
97b58163 MD |
2213 | } |
2214 | end: | |
bf956ec0 MD |
2215 | if (delete_all_nodes(merge_points)) { |
2216 | if (!ret) { | |
2217 | ERR("Unexpected merge points\n"); | |
2218 | ret = -EINVAL; | |
2219 | } | |
2220 | } | |
10544ee8 | 2221 | if (lttng_ust_lfht_destroy(merge_points)) { |
bf956ec0 MD |
2222 | ERR("Error destroying hash table\n"); |
2223 | } | |
97b58163 MD |
2224 | return ret; |
2225 | } |