Commit | Line | Data |
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2d78951a MD |
1 | /* |
2 | * lttng-filter.c | |
3 | * | |
4 | * LTTng UST filter code. | |
5 | * | |
6 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
7 | * | |
8 | * This library is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; only | |
11 | * version 2.1 of the License. | |
12 | * | |
13 | * This library is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with this library; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #include <errno.h> | |
24 | #include <stdio.h> | |
25 | #include <helper.h> | |
26 | #include <lttng/ust-events.h> | |
cd54f6d9 MD |
27 | #include <stdint.h> |
28 | #include <errno.h> | |
29 | #include <string.h> | |
30 | #include <inttypes.h> | |
31 | #include <limits.h> | |
b1caea50 | 32 | #include <usterr-signal-safe.h> |
cd54f6d9 MD |
33 | #include "filter-bytecode.h" |
34 | ||
35 | #define NR_REG 2 | |
36 | ||
37 | #ifndef min_t | |
38 | #define min_t(type, a, b) \ | |
39 | ((type) (a) < (type) (b) ? (type) (a) : (type) (b)) | |
40 | #endif | |
41 | ||
42 | #ifndef likely | |
43 | #define likely(x) __builtin_expect(!!(x), 1) | |
44 | #endif | |
45 | ||
46 | #ifndef unlikely | |
47 | #define unlikely(x) __builtin_expect(!!(x), 0) | |
48 | #endif | |
49 | ||
50 | #ifdef DEBUG | |
51 | #define dbg_printf(fmt, args...) printf("[debug bytecode] " fmt, ## args) | |
52 | #else | |
53 | #define dbg_printf(fmt, args...) \ | |
54 | do { \ | |
55 | /* do nothing but check printf format */ \ | |
56 | if (0) \ | |
57 | printf("[debug bytecode] " fmt, ## args); \ | |
58 | } while (0) | |
59 | #endif | |
60 | ||
61 | /* Linked bytecode */ | |
62 | struct bytecode_runtime { | |
63 | uint16_t len; | |
64 | char data[0]; | |
65 | }; | |
66 | ||
9522a886 MD |
67 | enum reg_type { |
68 | REG_S64, | |
69 | REG_DOUBLE, | |
70 | REG_STRING, | |
225b6640 | 71 | REG_TYPE_UNKNOWN, |
9522a886 MD |
72 | }; |
73 | ||
74 | /* Validation registers */ | |
75 | struct vreg { | |
76 | enum reg_type type; | |
77 | int literal; /* is string literal ? */ | |
78 | }; | |
79 | ||
80 | /* Execution registers */ | |
cd54f6d9 | 81 | struct reg { |
9522a886 | 82 | enum reg_type type; |
cd54f6d9 | 83 | int64_t v; |
da6eed25 | 84 | double d; |
cd54f6d9 MD |
85 | |
86 | const char *str; | |
87 | size_t seq_len; | |
88 | int literal; /* is string literal ? */ | |
89 | }; | |
90 | ||
91 | static const char *opnames[] = { | |
92 | [ FILTER_OP_UNKNOWN ] = "UNKNOWN", | |
93 | ||
94 | [ FILTER_OP_RETURN ] = "RETURN", | |
95 | ||
96 | /* binary */ | |
97 | [ FILTER_OP_MUL ] = "MUL", | |
98 | [ FILTER_OP_DIV ] = "DIV", | |
99 | [ FILTER_OP_MOD ] = "MOD", | |
100 | [ FILTER_OP_PLUS ] = "PLUS", | |
101 | [ FILTER_OP_MINUS ] = "MINUS", | |
102 | [ FILTER_OP_RSHIFT ] = "RSHIFT", | |
103 | [ FILTER_OP_LSHIFT ] = "LSHIFT", | |
104 | [ FILTER_OP_BIN_AND ] = "BIN_AND", | |
105 | [ FILTER_OP_BIN_OR ] = "BIN_OR", | |
106 | [ FILTER_OP_BIN_XOR ] = "BIN_XOR", | |
226106c0 MD |
107 | |
108 | /* binary comparators */ | |
cd54f6d9 MD |
109 | [ FILTER_OP_EQ ] = "EQ", |
110 | [ FILTER_OP_NE ] = "NE", | |
111 | [ FILTER_OP_GT ] = "GT", | |
112 | [ FILTER_OP_LT ] = "LT", | |
113 | [ FILTER_OP_GE ] = "GE", | |
114 | [ FILTER_OP_LE ] = "LE", | |
115 | ||
226106c0 MD |
116 | /* string binary comparators */ |
117 | [ FILTER_OP_EQ_STRING ] = "EQ_STRING", | |
118 | [ FILTER_OP_NE_STRING ] = "NE_STRING", | |
119 | [ FILTER_OP_GT_STRING ] = "GT_STRING", | |
120 | [ FILTER_OP_LT_STRING ] = "LT_STRING", | |
121 | [ FILTER_OP_GE_STRING ] = "GE_STRING", | |
122 | [ FILTER_OP_LE_STRING ] = "LE_STRING", | |
123 | ||
124 | /* s64 binary comparators */ | |
125 | [ FILTER_OP_EQ_S64 ] = "EQ_S64", | |
126 | [ FILTER_OP_NE_S64 ] = "NE_S64", | |
127 | [ FILTER_OP_GT_S64 ] = "GT_S64", | |
128 | [ FILTER_OP_LT_S64 ] = "LT_S64", | |
129 | [ FILTER_OP_GE_S64 ] = "GE_S64", | |
130 | [ FILTER_OP_LE_S64 ] = "LE_S64", | |
131 | ||
132 | /* double binary comparators */ | |
133 | [ FILTER_OP_EQ_DOUBLE ] = "EQ_DOUBLE", | |
134 | [ FILTER_OP_NE_DOUBLE ] = "NE_DOUBLE", | |
135 | [ FILTER_OP_GT_DOUBLE ] = "GT_DOUBLE", | |
136 | [ FILTER_OP_LT_DOUBLE ] = "LT_DOUBLE", | |
137 | [ FILTER_OP_GE_DOUBLE ] = "GE_DOUBLE", | |
138 | [ FILTER_OP_LE_DOUBLE ] = "LE_DOUBLE", | |
139 | ||
140 | ||
cd54f6d9 MD |
141 | /* unary */ |
142 | [ FILTER_OP_UNARY_PLUS ] = "UNARY_PLUS", | |
143 | [ FILTER_OP_UNARY_MINUS ] = "UNARY_MINUS", | |
144 | [ FILTER_OP_UNARY_NOT ] = "UNARY_NOT", | |
226106c0 MD |
145 | [ FILTER_OP_UNARY_PLUS_S64 ] = "UNARY_PLUS_S64", |
146 | [ FILTER_OP_UNARY_MINUS_S64 ] = "UNARY_MINUS_S64", | |
147 | [ FILTER_OP_UNARY_NOT_S64 ] = "UNARY_NOT_S64", | |
148 | [ FILTER_OP_UNARY_PLUS_DOUBLE ] = "UNARY_PLUS_DOUBLE", | |
149 | [ FILTER_OP_UNARY_MINUS_DOUBLE ] = "UNARY_MINUS_DOUBLE", | |
150 | [ FILTER_OP_UNARY_NOT_DOUBLE ] = "UNARY_NOT_DOUBLE", | |
cd54f6d9 MD |
151 | |
152 | /* logical */ | |
153 | [ FILTER_OP_AND ] = "AND", | |
154 | [ FILTER_OP_OR ] = "OR", | |
155 | ||
156 | /* load */ | |
157 | [ FILTER_OP_LOAD_FIELD_REF ] = "LOAD_FIELD_REF", | |
2f0145d1 MD |
158 | [ FILTER_OP_LOAD_FIELD_REF_STRING ] = "LOAD_FIELD_REF_STRING", |
159 | [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = "LOAD_FIELD_REF_SEQUENCE", | |
160 | [ FILTER_OP_LOAD_FIELD_REF_S64 ] = "LOAD_FIELD_REF_S64", | |
161 | [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = "LOAD_FIELD_REF_DOUBLE", | |
162 | ||
cd54f6d9 MD |
163 | [ FILTER_OP_LOAD_STRING ] = "LOAD_STRING", |
164 | [ FILTER_OP_LOAD_S64 ] = "LOAD_S64", | |
da6eed25 | 165 | [ FILTER_OP_LOAD_DOUBLE ] = "LOAD_DOUBLE", |
cd54f6d9 MD |
166 | }; |
167 | ||
168 | static | |
169 | const char *print_op(enum filter_op op) | |
170 | { | |
171 | if (op >= NR_FILTER_OPS) | |
172 | return "UNKNOWN"; | |
173 | else | |
174 | return opnames[op]; | |
175 | } | |
176 | ||
177 | /* | |
178 | * -1: wildcard found. | |
179 | * -2: unknown escape char. | |
180 | * 0: normal char. | |
181 | */ | |
182 | ||
183 | static | |
184 | int parse_char(const char **p) | |
185 | { | |
186 | switch (**p) { | |
187 | case '\\': | |
188 | (*p)++; | |
189 | switch (**p) { | |
190 | case '\\': | |
191 | case '*': | |
192 | return 0; | |
193 | default: | |
194 | return -2; | |
195 | } | |
196 | case '*': | |
197 | return -1; | |
198 | default: | |
199 | return 0; | |
200 | } | |
201 | } | |
202 | ||
203 | static | |
204 | int reg_strcmp(struct reg reg[NR_REG], const char *cmp_type) | |
205 | { | |
206 | const char *p = reg[REG_R0].str, *q = reg[REG_R1].str; | |
207 | int ret; | |
208 | int diff; | |
209 | ||
210 | for (;;) { | |
211 | int escaped_r0 = 0; | |
212 | ||
213 | if (unlikely(p - reg[REG_R0].str > reg[REG_R0].seq_len || *p == '\0')) { | |
214 | if (q - reg[REG_R1].str > reg[REG_R1].seq_len || *q == '\0') | |
215 | diff = 0; | |
216 | else | |
217 | diff = -1; | |
218 | break; | |
219 | } | |
220 | if (unlikely(q - reg[REG_R1].str > reg[REG_R1].seq_len || *q == '\0')) { | |
221 | if (p - reg[REG_R0].str > reg[REG_R0].seq_len || *p == '\0') | |
222 | diff = 0; | |
223 | else | |
224 | diff = 1; | |
225 | break; | |
226 | } | |
227 | if (reg[REG_R0].literal) { | |
228 | ret = parse_char(&p); | |
229 | if (ret == -1) { | |
230 | return 0; | |
231 | } else if (ret == -2) { | |
232 | escaped_r0 = 1; | |
233 | } | |
234 | /* else compare both char */ | |
235 | } | |
236 | if (reg[REG_R1].literal) { | |
237 | ret = parse_char(&q); | |
238 | if (ret == -1) { | |
239 | return 0; | |
240 | } else if (ret == -2) { | |
241 | if (!escaped_r0) | |
242 | return -1; | |
243 | } else { | |
244 | if (escaped_r0) | |
245 | return 1; | |
246 | } | |
247 | } else { | |
248 | if (escaped_r0) | |
249 | return 1; | |
250 | } | |
251 | diff = *p - *q; | |
252 | if (diff != 0) | |
253 | break; | |
254 | p++; | |
255 | q++; | |
256 | } | |
257 | return diff; | |
258 | } | |
259 | ||
260 | static | |
261 | int lttng_filter_false(void *filter_data, | |
262 | const char *filter_stack_data) | |
263 | { | |
264 | return 0; | |
265 | } | |
2d78951a MD |
266 | |
267 | static | |
268 | int lttng_filter_interpret_bytecode(void *filter_data, | |
269 | const char *filter_stack_data) | |
270 | { | |
cd54f6d9 MD |
271 | struct bytecode_runtime *bytecode = filter_data; |
272 | void *pc, *next_pc, *start_pc; | |
273 | int ret = -EINVAL; | |
274 | int retval = 0; | |
275 | struct reg reg[NR_REG]; | |
cd54f6d9 MD |
276 | |
277 | start_pc = &bytecode->data[0]; | |
278 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; | |
279 | pc = next_pc) { | |
cd54f6d9 MD |
280 | dbg_printf("Executing op %s (%u)\n", |
281 | print_op((unsigned int) *(filter_opcode_t *) pc), | |
282 | (unsigned int) *(filter_opcode_t *) pc); | |
283 | switch (*(filter_opcode_t *) pc) { | |
284 | case FILTER_OP_UNKNOWN: | |
2f0145d1 | 285 | case FILTER_OP_LOAD_FIELD_REF: |
cd54f6d9 | 286 | default: |
b1caea50 | 287 | ERR("unknown bytecode op %u\n", |
cd54f6d9 MD |
288 | (unsigned int) *(filter_opcode_t *) pc); |
289 | ret = -EINVAL; | |
290 | goto end; | |
291 | ||
292 | case FILTER_OP_RETURN: | |
293 | retval = !!reg[0].v; | |
294 | ret = 0; | |
295 | goto end; | |
296 | ||
297 | /* binary */ | |
298 | case FILTER_OP_MUL: | |
299 | case FILTER_OP_DIV: | |
300 | case FILTER_OP_MOD: | |
301 | case FILTER_OP_PLUS: | |
302 | case FILTER_OP_MINUS: | |
303 | case FILTER_OP_RSHIFT: | |
304 | case FILTER_OP_LSHIFT: | |
305 | case FILTER_OP_BIN_AND: | |
306 | case FILTER_OP_BIN_OR: | |
307 | case FILTER_OP_BIN_XOR: | |
b1caea50 | 308 | ERR("unsupported bytecode op %u\n", |
cd54f6d9 MD |
309 | (unsigned int) *(filter_opcode_t *) pc); |
310 | ret = -EINVAL; | |
311 | goto end; | |
312 | ||
313 | case FILTER_OP_EQ: | |
226106c0 MD |
314 | case FILTER_OP_NE: |
315 | case FILTER_OP_GT: | |
316 | case FILTER_OP_LT: | |
317 | case FILTER_OP_GE: | |
318 | case FILTER_OP_LE: | |
319 | ERR("unsupported non-specialized bytecode op %u\n", | |
320 | (unsigned int) *(filter_opcode_t *) pc); | |
321 | ret = -EINVAL; | |
322 | goto end; | |
cd54f6d9 | 323 | |
226106c0 MD |
324 | case FILTER_OP_EQ_STRING: |
325 | { | |
326 | reg[REG_R0].v = (reg_strcmp(reg, "==") == 0); | |
cd54f6d9 MD |
327 | reg[REG_R0].type = REG_S64; |
328 | next_pc += sizeof(struct binary_op); | |
329 | break; | |
330 | } | |
226106c0 | 331 | case FILTER_OP_NE_STRING: |
cd54f6d9 | 332 | { |
226106c0 | 333 | reg[REG_R0].v = (reg_strcmp(reg, "!=") != 0); |
cd54f6d9 MD |
334 | reg[REG_R0].type = REG_S64; |
335 | next_pc += sizeof(struct binary_op); | |
336 | break; | |
337 | } | |
226106c0 | 338 | case FILTER_OP_GT_STRING: |
cd54f6d9 | 339 | { |
226106c0 | 340 | reg[REG_R0].v = (reg_strcmp(reg, ">") > 0); |
cd54f6d9 MD |
341 | reg[REG_R0].type = REG_S64; |
342 | next_pc += sizeof(struct binary_op); | |
343 | break; | |
344 | } | |
226106c0 | 345 | case FILTER_OP_LT_STRING: |
cd54f6d9 | 346 | { |
226106c0 | 347 | reg[REG_R0].v = (reg_strcmp(reg, "<") < 0); |
cd54f6d9 MD |
348 | reg[REG_R0].type = REG_S64; |
349 | next_pc += sizeof(struct binary_op); | |
350 | break; | |
351 | } | |
226106c0 | 352 | case FILTER_OP_GE_STRING: |
cd54f6d9 | 353 | { |
226106c0 MD |
354 | reg[REG_R0].v = (reg_strcmp(reg, ">=") >= 0); |
355 | reg[REG_R0].type = REG_S64; | |
356 | next_pc += sizeof(struct binary_op); | |
357 | break; | |
358 | } | |
359 | case FILTER_OP_LE_STRING: | |
360 | { | |
361 | reg[REG_R0].v = (reg_strcmp(reg, "<=") <= 0); | |
362 | reg[REG_R0].type = REG_S64; | |
363 | next_pc += sizeof(struct binary_op); | |
364 | break; | |
365 | } | |
cd54f6d9 | 366 | |
226106c0 MD |
367 | case FILTER_OP_EQ_S64: |
368 | { | |
369 | reg[REG_R0].v = (reg[REG_R0].v == reg[REG_R1].v); | |
cd54f6d9 MD |
370 | reg[REG_R0].type = REG_S64; |
371 | next_pc += sizeof(struct binary_op); | |
372 | break; | |
373 | } | |
226106c0 | 374 | case FILTER_OP_NE_S64: |
cd54f6d9 | 375 | { |
226106c0 MD |
376 | reg[REG_R0].v = (reg[REG_R0].v != reg[REG_R1].v); |
377 | reg[REG_R0].type = REG_S64; | |
378 | next_pc += sizeof(struct binary_op); | |
379 | break; | |
380 | } | |
381 | case FILTER_OP_GT_S64: | |
382 | { | |
383 | reg[REG_R0].v = (reg[REG_R0].v > reg[REG_R1].v); | |
384 | reg[REG_R0].type = REG_S64; | |
385 | next_pc += sizeof(struct binary_op); | |
386 | break; | |
387 | } | |
388 | case FILTER_OP_LT_S64: | |
389 | { | |
390 | reg[REG_R0].v = (reg[REG_R0].v < reg[REG_R1].v); | |
391 | reg[REG_R0].type = REG_S64; | |
392 | next_pc += sizeof(struct binary_op); | |
393 | break; | |
394 | } | |
395 | case FILTER_OP_GE_S64: | |
396 | { | |
397 | reg[REG_R0].v = (reg[REG_R0].v >= reg[REG_R1].v); | |
398 | reg[REG_R0].type = REG_S64; | |
399 | next_pc += sizeof(struct binary_op); | |
400 | break; | |
401 | } | |
402 | case FILTER_OP_LE_S64: | |
403 | { | |
404 | reg[REG_R0].v = (reg[REG_R0].v <= reg[REG_R1].v); | |
405 | reg[REG_R0].type = REG_S64; | |
406 | next_pc += sizeof(struct binary_op); | |
407 | break; | |
408 | } | |
cd54f6d9 | 409 | |
226106c0 MD |
410 | case FILTER_OP_EQ_DOUBLE: |
411 | { | |
412 | if (unlikely(reg[REG_R0].type == REG_S64)) | |
413 | reg[REG_R0].d = (double) reg[REG_R0].v; | |
414 | else if (unlikely(reg[REG_R1].type == REG_S64)) | |
415 | reg[REG_R1].d = (double) reg[REG_R1].v; | |
416 | reg[REG_R0].v = (reg[REG_R0].d == reg[REG_R1].d); | |
417 | reg[REG_R0].type = REG_S64; | |
418 | next_pc += sizeof(struct binary_op); | |
419 | break; | |
420 | } | |
421 | case FILTER_OP_NE_DOUBLE: | |
422 | { | |
423 | if (unlikely(reg[REG_R0].type == REG_S64)) | |
424 | reg[REG_R0].d = (double) reg[REG_R0].v; | |
425 | else if (unlikely(reg[REG_R1].type == REG_S64)) | |
426 | reg[REG_R1].d = (double) reg[REG_R1].v; | |
427 | reg[REG_R0].v = (reg[REG_R0].d != reg[REG_R1].d); | |
428 | reg[REG_R0].type = REG_S64; | |
429 | next_pc += sizeof(struct binary_op); | |
430 | break; | |
431 | } | |
432 | case FILTER_OP_GT_DOUBLE: | |
433 | { | |
434 | if (unlikely(reg[REG_R0].type == REG_S64)) | |
435 | reg[REG_R0].d = (double) reg[REG_R0].v; | |
436 | else if (unlikely(reg[REG_R1].type == REG_S64)) | |
437 | reg[REG_R1].d = (double) reg[REG_R1].v; | |
438 | reg[REG_R0].v = (reg[REG_R0].d > reg[REG_R1].d); | |
439 | reg[REG_R0].type = REG_S64; | |
440 | next_pc += sizeof(struct binary_op); | |
441 | break; | |
442 | } | |
443 | case FILTER_OP_LT_DOUBLE: | |
444 | { | |
445 | if (unlikely(reg[REG_R0].type == REG_S64)) | |
446 | reg[REG_R0].d = (double) reg[REG_R0].v; | |
447 | else if (unlikely(reg[REG_R1].type == REG_S64)) | |
448 | reg[REG_R1].d = (double) reg[REG_R1].v; | |
449 | reg[REG_R0].v = (reg[REG_R0].d < reg[REG_R1].d); | |
450 | reg[REG_R0].type = REG_S64; | |
451 | next_pc += sizeof(struct binary_op); | |
452 | break; | |
453 | } | |
454 | case FILTER_OP_GE_DOUBLE: | |
455 | { | |
456 | if (unlikely(reg[REG_R0].type == REG_S64)) | |
457 | reg[REG_R0].d = (double) reg[REG_R0].v; | |
458 | else if (unlikely(reg[REG_R1].type == REG_S64)) | |
459 | reg[REG_R1].d = (double) reg[REG_R1].v; | |
460 | reg[REG_R0].v = (reg[REG_R0].d >= reg[REG_R1].d); | |
461 | reg[REG_R0].type = REG_S64; | |
462 | next_pc += sizeof(struct binary_op); | |
463 | break; | |
464 | } | |
465 | case FILTER_OP_LE_DOUBLE: | |
466 | { | |
467 | if (unlikely(reg[REG_R0].type == REG_S64)) | |
468 | reg[REG_R0].d = (double) reg[REG_R0].v; | |
469 | else if (unlikely(reg[REG_R1].type == REG_S64)) | |
470 | reg[REG_R1].d = (double) reg[REG_R1].v; | |
471 | reg[REG_R0].v = (reg[REG_R0].d <= reg[REG_R1].d); | |
cd54f6d9 MD |
472 | reg[REG_R0].type = REG_S64; |
473 | next_pc += sizeof(struct binary_op); | |
474 | break; | |
475 | } | |
476 | ||
477 | /* unary */ | |
478 | case FILTER_OP_UNARY_PLUS: | |
479 | { | |
cd54f6d9 MD |
480 | next_pc += sizeof(struct unary_op); |
481 | break; | |
482 | } | |
483 | case FILTER_OP_UNARY_MINUS: | |
484 | { | |
485 | struct unary_op *insn = (struct unary_op *) pc; | |
486 | ||
da6eed25 MD |
487 | switch (reg[insn->reg].type) { |
488 | default: | |
b1caea50 | 489 | ERR("unknown register type\n"); |
cd54f6d9 MD |
490 | ret = -EINVAL; |
491 | goto end; | |
da6eed25 MD |
492 | |
493 | case REG_STRING: | |
b1caea50 | 494 | ERR("Unary minus can only be applied to numeric or floating point registers\n"); |
da6eed25 MD |
495 | ret = -EINVAL; |
496 | goto end; | |
497 | case REG_S64: | |
498 | reg[insn->reg].v = -reg[insn->reg].v; | |
499 | break; | |
500 | case REG_DOUBLE: | |
501 | reg[insn->reg].d = -reg[insn->reg].d; | |
502 | break; | |
cd54f6d9 | 503 | } |
cd54f6d9 MD |
504 | next_pc += sizeof(struct unary_op); |
505 | break; | |
506 | } | |
507 | case FILTER_OP_UNARY_NOT: | |
508 | { | |
509 | struct unary_op *insn = (struct unary_op *) pc; | |
510 | ||
da6eed25 MD |
511 | switch (reg[insn->reg].type) { |
512 | default: | |
b1caea50 | 513 | ERR("unknown register type\n"); |
da6eed25 MD |
514 | ret = -EINVAL; |
515 | goto end; | |
516 | ||
517 | case REG_STRING: | |
b1caea50 | 518 | ERR("Unary not can only be applied to numeric or floating point registers\n"); |
da6eed25 MD |
519 | ret = -EINVAL; |
520 | goto end; | |
521 | case REG_S64: | |
522 | reg[insn->reg].v = !reg[insn->reg].v; | |
523 | break; | |
524 | case REG_DOUBLE: | |
525 | reg[insn->reg].d = !reg[insn->reg].d; | |
526 | break; | |
527 | } | |
cd54f6d9 MD |
528 | reg[insn->reg].v = !reg[insn->reg].v; |
529 | next_pc += sizeof(struct unary_op); | |
530 | break; | |
531 | } | |
532 | /* logical */ | |
533 | case FILTER_OP_AND: | |
534 | { | |
535 | struct logical_op *insn = (struct logical_op *) pc; | |
536 | ||
cd54f6d9 | 537 | /* If REG_R0 is 0, skip and evaluate to 0 */ |
da6eed25 MD |
538 | if ((reg[REG_R0].type == REG_S64 && reg[REG_R0].v == 0) |
539 | || (reg[REG_R0].type == REG_DOUBLE && reg[REG_R0].d == 0.0)) { | |
cd54f6d9 MD |
540 | dbg_printf("Jumping to bytecode offset %u\n", |
541 | (unsigned int) insn->skip_offset); | |
542 | next_pc = start_pc + insn->skip_offset; | |
cd54f6d9 MD |
543 | } else { |
544 | next_pc += sizeof(struct logical_op); | |
545 | } | |
546 | break; | |
547 | } | |
548 | case FILTER_OP_OR: | |
549 | { | |
550 | struct logical_op *insn = (struct logical_op *) pc; | |
551 | ||
cd54f6d9 | 552 | /* If REG_R0 is nonzero, skip and evaluate to 1 */ |
da6eed25 MD |
553 | |
554 | if ((reg[REG_R0].type == REG_S64 && reg[REG_R0].v != 0) | |
555 | || (reg[REG_R0].type == REG_DOUBLE && reg[REG_R0].d != 0.0)) { | |
cd54f6d9 MD |
556 | reg[REG_R0].v = 1; |
557 | dbg_printf("Jumping to bytecode offset %u\n", | |
558 | (unsigned int) insn->skip_offset); | |
559 | next_pc = start_pc + insn->skip_offset; | |
cd54f6d9 MD |
560 | } else { |
561 | next_pc += sizeof(struct logical_op); | |
562 | } | |
563 | break; | |
564 | } | |
565 | ||
566 | /* load */ | |
2f0145d1 | 567 | case FILTER_OP_LOAD_FIELD_REF_STRING: |
cd54f6d9 MD |
568 | { |
569 | struct load_op *insn = (struct load_op *) pc; | |
570 | struct field_ref *ref = (struct field_ref *) insn->data; | |
571 | ||
2f0145d1 MD |
572 | dbg_printf("load field ref offset %u type string\n", |
573 | ref->offset); | |
574 | reg[insn->reg].str = | |
575 | *(const char * const *) &filter_stack_data[ref->offset]; | |
576 | reg[insn->reg].type = REG_STRING; | |
577 | reg[insn->reg].seq_len = UINT_MAX; | |
578 | reg[insn->reg].literal = 0; | |
579 | dbg_printf("ref load string %s\n", reg[insn->reg].str); | |
580 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
581 | break; | |
582 | } | |
cd54f6d9 | 583 | |
2f0145d1 MD |
584 | case FILTER_OP_LOAD_FIELD_REF_SEQUENCE: |
585 | { | |
586 | struct load_op *insn = (struct load_op *) pc; | |
587 | struct field_ref *ref = (struct field_ref *) insn->data; | |
cd54f6d9 | 588 | |
2f0145d1 MD |
589 | dbg_printf("load field ref offset %u type sequence\n", |
590 | ref->offset); | |
591 | reg[insn->reg].seq_len = | |
592 | *(unsigned long *) &filter_stack_data[ref->offset]; | |
593 | reg[insn->reg].str = | |
594 | *(const char **) (&filter_stack_data[ref->offset | |
595 | + sizeof(unsigned long)]); | |
596 | reg[insn->reg].type = REG_STRING; | |
597 | reg[insn->reg].literal = 0; | |
598 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
599 | break; | |
600 | } | |
601 | ||
602 | case FILTER_OP_LOAD_FIELD_REF_S64: | |
603 | { | |
604 | struct load_op *insn = (struct load_op *) pc; | |
605 | struct field_ref *ref = (struct field_ref *) insn->data; | |
606 | ||
607 | dbg_printf("load field ref offset %u type s64\n", | |
608 | ref->offset); | |
609 | memcpy(®[insn->reg].v, &filter_stack_data[ref->offset], | |
610 | sizeof(struct literal_numeric)); | |
611 | reg[insn->reg].type = REG_S64; | |
612 | reg[insn->reg].literal = 0; | |
613 | dbg_printf("ref load s64 %" PRIi64 "\n", reg[insn->reg].v); | |
614 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
615 | break; | |
616 | } | |
617 | ||
618 | case FILTER_OP_LOAD_FIELD_REF_DOUBLE: | |
619 | { | |
620 | struct load_op *insn = (struct load_op *) pc; | |
621 | struct field_ref *ref = (struct field_ref *) insn->data; | |
622 | ||
623 | dbg_printf("load field ref offset %u type double\n", | |
624 | ref->offset); | |
625 | memcpy(®[insn->reg].d, &filter_stack_data[ref->offset], | |
626 | sizeof(struct literal_double)); | |
627 | reg[insn->reg].type = REG_DOUBLE; | |
628 | reg[insn->reg].literal = 0; | |
629 | dbg_printf("ref load double %g\n", reg[insn->reg].d); | |
cd54f6d9 MD |
630 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
631 | break; | |
632 | } | |
633 | ||
634 | case FILTER_OP_LOAD_STRING: | |
635 | { | |
636 | struct load_op *insn = (struct load_op *) pc; | |
637 | ||
cd54f6d9 MD |
638 | dbg_printf("load string %s\n", insn->data); |
639 | reg[insn->reg].str = insn->data; | |
640 | reg[insn->reg].type = REG_STRING; | |
641 | reg[insn->reg].seq_len = UINT_MAX; | |
642 | reg[insn->reg].literal = 1; | |
643 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
644 | break; | |
645 | } | |
646 | ||
647 | case FILTER_OP_LOAD_S64: | |
648 | { | |
649 | struct load_op *insn = (struct load_op *) pc; | |
650 | ||
cd54f6d9 MD |
651 | memcpy(®[insn->reg].v, insn->data, |
652 | sizeof(struct literal_numeric)); | |
653 | dbg_printf("load s64 %" PRIi64 "\n", reg[insn->reg].v); | |
654 | reg[insn->reg].type = REG_S64; | |
08c84b15 | 655 | reg[insn->reg].literal = 1; |
cd54f6d9 MD |
656 | next_pc += sizeof(struct load_op) |
657 | + sizeof(struct literal_numeric); | |
658 | break; | |
659 | } | |
da6eed25 MD |
660 | |
661 | case FILTER_OP_LOAD_DOUBLE: | |
662 | { | |
663 | struct load_op *insn = (struct load_op *) pc; | |
664 | ||
da6eed25 MD |
665 | memcpy(®[insn->reg].d, insn->data, |
666 | sizeof(struct literal_double)); | |
667 | dbg_printf("load s64 %g\n", reg[insn->reg].d); | |
668 | reg[insn->reg].type = REG_DOUBLE; | |
08c84b15 | 669 | reg[insn->reg].literal = 1; |
da6eed25 MD |
670 | next_pc += sizeof(struct load_op) |
671 | + sizeof(struct literal_double); | |
672 | break; | |
673 | } | |
cd54f6d9 MD |
674 | } |
675 | } | |
676 | end: | |
677 | /* return 0 (discard) on error */ | |
678 | if (ret) | |
679 | return 0; | |
680 | return retval; | |
681 | } | |
682 | ||
9522a886 MD |
683 | static |
684 | int bin_op_compare_check(struct vreg reg[NR_REG], const char *str) | |
685 | { | |
686 | switch (reg[REG_R0].type) { | |
687 | default: | |
688 | goto error_unknown; | |
689 | ||
690 | case REG_STRING: | |
691 | switch (reg[REG_R1].type) { | |
692 | default: | |
693 | goto error_unknown; | |
694 | ||
695 | case REG_STRING: | |
696 | break; | |
697 | case REG_S64: | |
698 | case REG_DOUBLE: | |
699 | goto error_mismatch; | |
700 | } | |
701 | break; | |
702 | case REG_S64: | |
703 | case REG_DOUBLE: | |
704 | switch (reg[REG_R1].type) { | |
705 | default: | |
706 | goto error_unknown; | |
707 | ||
708 | case REG_STRING: | |
709 | goto error_mismatch; | |
710 | ||
711 | case REG_S64: | |
712 | case REG_DOUBLE: | |
713 | break; | |
714 | } | |
715 | break; | |
716 | } | |
717 | return 0; | |
718 | ||
719 | error_unknown: | |
720 | ||
721 | return -EINVAL; | |
722 | error_mismatch: | |
723 | ERR("type mismatch for '%s' binary operator\n", str); | |
724 | return -EINVAL; | |
725 | } | |
726 | ||
727 | static | |
728 | int lttng_filter_validate_bytecode(struct bytecode_runtime *bytecode) | |
729 | { | |
730 | void *pc, *next_pc, *start_pc; | |
731 | int ret = -EINVAL; | |
732 | struct vreg reg[NR_REG]; | |
733 | int i; | |
734 | ||
735 | for (i = 0; i < NR_REG; i++) { | |
225b6640 | 736 | reg[i].type = REG_TYPE_UNKNOWN; |
9522a886 MD |
737 | reg[i].literal = 0; |
738 | } | |
739 | ||
740 | start_pc = &bytecode->data[0]; | |
741 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; | |
742 | pc = next_pc) { | |
743 | if (unlikely(pc >= start_pc + bytecode->len)) { | |
744 | ERR("filter bytecode overflow\n"); | |
745 | ret = -EINVAL; | |
746 | goto end; | |
747 | } | |
748 | dbg_printf("Validating op %s (%u)\n", | |
749 | print_op((unsigned int) *(filter_opcode_t *) pc), | |
750 | (unsigned int) *(filter_opcode_t *) pc); | |
751 | switch (*(filter_opcode_t *) pc) { | |
752 | case FILTER_OP_UNKNOWN: | |
753 | default: | |
754 | ERR("unknown bytecode op %u\n", | |
755 | (unsigned int) *(filter_opcode_t *) pc); | |
756 | ret = -EINVAL; | |
757 | goto end; | |
758 | ||
759 | case FILTER_OP_RETURN: | |
760 | ret = 0; | |
761 | goto end; | |
762 | ||
763 | /* binary */ | |
764 | case FILTER_OP_MUL: | |
765 | case FILTER_OP_DIV: | |
766 | case FILTER_OP_MOD: | |
767 | case FILTER_OP_PLUS: | |
768 | case FILTER_OP_MINUS: | |
769 | case FILTER_OP_RSHIFT: | |
770 | case FILTER_OP_LSHIFT: | |
771 | case FILTER_OP_BIN_AND: | |
772 | case FILTER_OP_BIN_OR: | |
773 | case FILTER_OP_BIN_XOR: | |
774 | ERR("unsupported bytecode op %u\n", | |
775 | (unsigned int) *(filter_opcode_t *) pc); | |
776 | ret = -EINVAL; | |
777 | goto end; | |
778 | ||
779 | case FILTER_OP_EQ: | |
780 | { | |
781 | ret = bin_op_compare_check(reg, "=="); | |
782 | if (ret) | |
783 | goto end; | |
784 | reg[REG_R0].type = REG_S64; | |
785 | next_pc += sizeof(struct binary_op); | |
786 | break; | |
787 | } | |
788 | case FILTER_OP_NE: | |
789 | { | |
790 | ret = bin_op_compare_check(reg, "!="); | |
791 | if (ret) | |
792 | goto end; | |
793 | reg[REG_R0].type = REG_S64; | |
794 | next_pc += sizeof(struct binary_op); | |
795 | break; | |
796 | } | |
797 | case FILTER_OP_GT: | |
798 | { | |
799 | ret = bin_op_compare_check(reg, ">"); | |
800 | if (ret) | |
801 | goto end; | |
802 | reg[REG_R0].type = REG_S64; | |
803 | next_pc += sizeof(struct binary_op); | |
804 | break; | |
805 | } | |
806 | case FILTER_OP_LT: | |
807 | { | |
808 | ret = bin_op_compare_check(reg, "<"); | |
809 | if (ret) | |
810 | goto end; | |
811 | reg[REG_R0].type = REG_S64; | |
812 | next_pc += sizeof(struct binary_op); | |
813 | break; | |
814 | } | |
815 | case FILTER_OP_GE: | |
816 | { | |
817 | ret = bin_op_compare_check(reg, ">="); | |
818 | if (ret) | |
819 | goto end; | |
820 | reg[REG_R0].type = REG_S64; | |
821 | next_pc += sizeof(struct binary_op); | |
822 | break; | |
823 | } | |
824 | case FILTER_OP_LE: | |
825 | { | |
826 | ret = bin_op_compare_check(reg, "<="); | |
827 | if (ret) | |
828 | goto end; | |
829 | reg[REG_R0].type = REG_S64; | |
830 | next_pc += sizeof(struct binary_op); | |
831 | break; | |
832 | } | |
833 | ||
226106c0 MD |
834 | case FILTER_OP_EQ_STRING: |
835 | case FILTER_OP_NE_STRING: | |
836 | case FILTER_OP_GT_STRING: | |
837 | case FILTER_OP_LT_STRING: | |
838 | case FILTER_OP_GE_STRING: | |
839 | case FILTER_OP_LE_STRING: | |
840 | { | |
841 | if (reg[REG_R0].type != REG_STRING | |
842 | || reg[REG_R1].type != REG_STRING) { | |
843 | ERR("Unexpected register type for string comparator\n"); | |
844 | ret = -EINVAL; | |
845 | goto end; | |
846 | } | |
847 | reg[REG_R0].type = REG_S64; | |
848 | next_pc += sizeof(struct binary_op); | |
849 | break; | |
850 | } | |
851 | ||
852 | case FILTER_OP_EQ_S64: | |
853 | case FILTER_OP_NE_S64: | |
854 | case FILTER_OP_GT_S64: | |
855 | case FILTER_OP_LT_S64: | |
856 | case FILTER_OP_GE_S64: | |
857 | case FILTER_OP_LE_S64: | |
858 | { | |
859 | if (reg[REG_R0].type != REG_S64 | |
860 | || reg[REG_R1].type != REG_S64) { | |
861 | ERR("Unexpected register type for s64 comparator\n"); | |
862 | ret = -EINVAL; | |
863 | goto end; | |
864 | } | |
865 | reg[REG_R0].type = REG_S64; | |
866 | next_pc += sizeof(struct binary_op); | |
867 | break; | |
868 | } | |
869 | ||
870 | case FILTER_OP_EQ_DOUBLE: | |
871 | case FILTER_OP_NE_DOUBLE: | |
872 | case FILTER_OP_GT_DOUBLE: | |
873 | case FILTER_OP_LT_DOUBLE: | |
874 | case FILTER_OP_GE_DOUBLE: | |
875 | case FILTER_OP_LE_DOUBLE: | |
876 | { | |
877 | if ((reg[REG_R0].type != REG_DOUBLE && reg[REG_R0].type != REG_S64) | |
878 | || (reg[REG_R1].type != REG_DOUBLE && reg[REG_R1].type != REG_S64)) { | |
879 | ERR("Unexpected register type for double comparator\n"); | |
880 | ret = -EINVAL; | |
881 | goto end; | |
882 | } | |
883 | reg[REG_R0].type = REG_DOUBLE; | |
884 | next_pc += sizeof(struct binary_op); | |
885 | break; | |
886 | } | |
887 | ||
9522a886 MD |
888 | /* unary */ |
889 | case FILTER_OP_UNARY_PLUS: | |
890 | case FILTER_OP_UNARY_MINUS: | |
891 | case FILTER_OP_UNARY_NOT: | |
892 | { | |
893 | struct unary_op *insn = (struct unary_op *) pc; | |
894 | ||
895 | if (unlikely(insn->reg >= REG_ERROR)) { | |
896 | ERR("invalid register %u\n", | |
897 | (unsigned int) insn->reg); | |
898 | ret = -EINVAL; | |
899 | goto end; | |
900 | } | |
901 | switch (reg[insn->reg].type) { | |
902 | default: | |
903 | ERR("unknown register type\n"); | |
904 | ret = -EINVAL; | |
905 | goto end; | |
906 | ||
907 | case REG_STRING: | |
908 | ERR("Unary op can only be applied to numeric or floating point registers\n"); | |
909 | ret = -EINVAL; | |
910 | goto end; | |
911 | case REG_S64: | |
912 | break; | |
913 | case REG_DOUBLE: | |
914 | break; | |
915 | } | |
916 | next_pc += sizeof(struct unary_op); | |
917 | break; | |
918 | } | |
08c84b15 MD |
919 | |
920 | case FILTER_OP_UNARY_PLUS_S64: | |
921 | case FILTER_OP_UNARY_MINUS_S64: | |
922 | case FILTER_OP_UNARY_NOT_S64: | |
923 | { | |
924 | struct unary_op *insn = (struct unary_op *) pc; | |
925 | ||
926 | if (unlikely(insn->reg >= REG_ERROR)) { | |
927 | ERR("invalid register %u\n", | |
928 | (unsigned int) insn->reg); | |
929 | ret = -EINVAL; | |
930 | goto end; | |
931 | } | |
932 | if (reg[insn->reg].type != REG_S64) { | |
933 | ERR("Invalid register type\n"); | |
934 | ret = -EINVAL; | |
935 | goto end; | |
936 | } | |
937 | next_pc += sizeof(struct unary_op); | |
938 | break; | |
939 | } | |
940 | ||
941 | case FILTER_OP_UNARY_PLUS_DOUBLE: | |
942 | case FILTER_OP_UNARY_MINUS_DOUBLE: | |
943 | case FILTER_OP_UNARY_NOT_DOUBLE: | |
944 | { | |
945 | struct unary_op *insn = (struct unary_op *) pc; | |
946 | ||
947 | if (unlikely(insn->reg >= REG_ERROR)) { | |
948 | ERR("invalid register %u\n", | |
949 | (unsigned int) insn->reg); | |
950 | ret = -EINVAL; | |
951 | goto end; | |
952 | } | |
953 | if (reg[insn->reg].type != REG_DOUBLE) { | |
954 | ERR("Invalid register type\n"); | |
955 | ret = -EINVAL; | |
956 | goto end; | |
957 | } | |
958 | next_pc += sizeof(struct unary_op); | |
959 | break; | |
960 | } | |
961 | ||
9522a886 MD |
962 | /* logical */ |
963 | case FILTER_OP_AND: | |
964 | case FILTER_OP_OR: | |
965 | { | |
966 | struct logical_op *insn = (struct logical_op *) pc; | |
967 | ||
225b6640 | 968 | if (unlikely(reg[REG_R0].type == REG_TYPE_UNKNOWN |
fb72494a | 969 | || reg[REG_R1].type == REG_TYPE_UNKNOWN |
225b6640 MD |
970 | || reg[REG_R0].type == REG_STRING |
971 | || reg[REG_R1].type == REG_STRING)) { | |
972 | ERR("Logical comparator can only be applied to numeric and floating point registers\n"); | |
9522a886 MD |
973 | ret = -EINVAL; |
974 | goto end; | |
975 | } | |
976 | ||
977 | dbg_printf("Validate jumping to bytecode offset %u\n", | |
978 | (unsigned int) insn->skip_offset); | |
979 | if (unlikely(start_pc + insn->skip_offset <= pc)) { | |
980 | ERR("Loops are not allowed in bytecode\n"); | |
981 | ret = -EINVAL; | |
982 | goto end; | |
983 | } | |
984 | next_pc += sizeof(struct logical_op); | |
985 | break; | |
986 | } | |
987 | ||
988 | /* load */ | |
989 | case FILTER_OP_LOAD_FIELD_REF: | |
2f0145d1 MD |
990 | { |
991 | ERR("Unknown field ref type\n"); | |
992 | ret = -EINVAL; | |
993 | goto end; | |
994 | } | |
995 | case FILTER_OP_LOAD_FIELD_REF_STRING: | |
996 | case FILTER_OP_LOAD_FIELD_REF_SEQUENCE: | |
9522a886 MD |
997 | { |
998 | struct load_op *insn = (struct load_op *) pc; | |
999 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1000 | ||
1001 | if (unlikely(insn->reg >= REG_ERROR)) { | |
1002 | ERR("invalid register %u\n", | |
1003 | (unsigned int) insn->reg); | |
1004 | ret = -EINVAL; | |
1005 | goto end; | |
1006 | } | |
2f0145d1 MD |
1007 | dbg_printf("Validate load field ref offset %u type string\n", |
1008 | ref->offset); | |
1009 | reg[insn->reg].type = REG_STRING; | |
1010 | reg[insn->reg].literal = 0; | |
1011 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1012 | break; | |
1013 | } | |
1014 | case FILTER_OP_LOAD_FIELD_REF_S64: | |
1015 | { | |
1016 | struct load_op *insn = (struct load_op *) pc; | |
1017 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1018 | ||
1019 | if (unlikely(insn->reg >= REG_ERROR)) { | |
1020 | ERR("invalid register %u\n", | |
1021 | (unsigned int) insn->reg); | |
9522a886 MD |
1022 | ret = -EINVAL; |
1023 | goto end; | |
9522a886 | 1024 | } |
2f0145d1 MD |
1025 | dbg_printf("Validate load field ref offset %u type s64\n", |
1026 | ref->offset); | |
1027 | reg[insn->reg].type = REG_S64; | |
1028 | reg[insn->reg].literal = 0; | |
1029 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1030 | break; | |
1031 | } | |
1032 | case FILTER_OP_LOAD_FIELD_REF_DOUBLE: | |
1033 | { | |
1034 | struct load_op *insn = (struct load_op *) pc; | |
1035 | struct field_ref *ref = (struct field_ref *) insn->data; | |
9522a886 | 1036 | |
2f0145d1 MD |
1037 | if (unlikely(insn->reg >= REG_ERROR)) { |
1038 | ERR("invalid register %u\n", | |
1039 | (unsigned int) insn->reg); | |
1040 | ret = -EINVAL; | |
1041 | goto end; | |
1042 | } | |
1043 | dbg_printf("Validate load field ref offset %u type double\n", | |
1044 | ref->offset); | |
1045 | reg[insn->reg].type = REG_DOUBLE; | |
1046 | reg[insn->reg].literal = 0; | |
9522a886 MD |
1047 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1048 | break; | |
1049 | } | |
1050 | ||
1051 | case FILTER_OP_LOAD_STRING: | |
1052 | { | |
1053 | struct load_op *insn = (struct load_op *) pc; | |
1054 | ||
1055 | if (unlikely(insn->reg >= REG_ERROR)) { | |
1056 | ERR("invalid register %u\n", | |
1057 | (unsigned int) insn->reg); | |
1058 | ret = -EINVAL; | |
1059 | goto end; | |
1060 | } | |
1061 | reg[insn->reg].type = REG_STRING; | |
1062 | reg[insn->reg].literal = 1; | |
1063 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1064 | break; | |
1065 | } | |
1066 | ||
1067 | case FILTER_OP_LOAD_S64: | |
1068 | { | |
1069 | struct load_op *insn = (struct load_op *) pc; | |
1070 | ||
1071 | if (unlikely(insn->reg >= REG_ERROR)) { | |
1072 | ERR("invalid register %u\n", | |
1073 | (unsigned int) insn->reg); | |
1074 | ret = -EINVAL; | |
1075 | goto end; | |
1076 | } | |
1077 | reg[insn->reg].type = REG_S64; | |
08c84b15 | 1078 | reg[insn->reg].literal = 1; |
9522a886 MD |
1079 | next_pc += sizeof(struct load_op) |
1080 | + sizeof(struct literal_numeric); | |
1081 | break; | |
1082 | } | |
1083 | ||
1084 | case FILTER_OP_LOAD_DOUBLE: | |
1085 | { | |
1086 | struct load_op *insn = (struct load_op *) pc; | |
1087 | ||
1088 | if (unlikely(insn->reg >= REG_ERROR)) { | |
1089 | ERR("invalid register %u\n", | |
1090 | (unsigned int) insn->reg); | |
1091 | ret = -EINVAL; | |
1092 | goto end; | |
1093 | } | |
1094 | reg[insn->reg].type = REG_DOUBLE; | |
08c84b15 | 1095 | reg[insn->reg].literal = 1; |
9522a886 MD |
1096 | next_pc += sizeof(struct load_op) |
1097 | + sizeof(struct literal_double); | |
1098 | break; | |
1099 | } | |
1100 | } | |
1101 | } | |
1102 | end: | |
1103 | return ret; | |
1104 | } | |
1105 | ||
08c84b15 MD |
1106 | static |
1107 | int lttng_filter_specialize_bytecode(struct bytecode_runtime *bytecode) | |
1108 | { | |
1109 | void *pc, *next_pc, *start_pc; | |
1110 | int ret = -EINVAL; | |
1111 | struct vreg reg[NR_REG]; | |
1112 | int i; | |
1113 | ||
1114 | for (i = 0; i < NR_REG; i++) { | |
1115 | reg[i].type = REG_TYPE_UNKNOWN; | |
1116 | reg[i].literal = 0; | |
1117 | } | |
1118 | ||
1119 | start_pc = &bytecode->data[0]; | |
1120 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; | |
1121 | pc = next_pc) { | |
1122 | switch (*(filter_opcode_t *) pc) { | |
1123 | case FILTER_OP_UNKNOWN: | |
1124 | default: | |
1125 | ERR("unknown bytecode op %u\n", | |
1126 | (unsigned int) *(filter_opcode_t *) pc); | |
1127 | ret = -EINVAL; | |
1128 | goto end; | |
1129 | ||
1130 | case FILTER_OP_RETURN: | |
1131 | ret = 0; | |
1132 | goto end; | |
1133 | ||
1134 | /* binary */ | |
1135 | case FILTER_OP_MUL: | |
1136 | case FILTER_OP_DIV: | |
1137 | case FILTER_OP_MOD: | |
1138 | case FILTER_OP_PLUS: | |
1139 | case FILTER_OP_MINUS: | |
1140 | case FILTER_OP_RSHIFT: | |
1141 | case FILTER_OP_LSHIFT: | |
1142 | case FILTER_OP_BIN_AND: | |
1143 | case FILTER_OP_BIN_OR: | |
1144 | case FILTER_OP_BIN_XOR: | |
1145 | ERR("unsupported bytecode op %u\n", | |
1146 | (unsigned int) *(filter_opcode_t *) pc); | |
1147 | ret = -EINVAL; | |
1148 | goto end; | |
1149 | ||
1150 | case FILTER_OP_EQ: | |
226106c0 MD |
1151 | { |
1152 | struct binary_op *insn = (struct binary_op *) pc; | |
1153 | ||
1154 | switch(reg[REG_R0].type) { | |
1155 | default: | |
1156 | ERR("unknown register type\n"); | |
1157 | ret = -EINVAL; | |
1158 | goto end; | |
1159 | ||
1160 | case REG_STRING: | |
1161 | insn->op = FILTER_OP_EQ_STRING; | |
1162 | break; | |
1163 | case REG_S64: | |
1164 | if (reg[REG_R1].type == REG_S64) | |
1165 | insn->op = FILTER_OP_EQ_S64; | |
1166 | else | |
1167 | insn->op = FILTER_OP_EQ_DOUBLE; | |
1168 | break; | |
1169 | case REG_DOUBLE: | |
1170 | insn->op = FILTER_OP_EQ_DOUBLE; | |
1171 | break; | |
1172 | } | |
1173 | reg[REG_R0].type = REG_S64; | |
1174 | next_pc += sizeof(struct binary_op); | |
1175 | break; | |
1176 | } | |
1177 | ||
08c84b15 | 1178 | case FILTER_OP_NE: |
226106c0 MD |
1179 | { |
1180 | struct binary_op *insn = (struct binary_op *) pc; | |
1181 | ||
1182 | switch(reg[REG_R0].type) { | |
1183 | default: | |
1184 | ERR("unknown register type\n"); | |
1185 | ret = -EINVAL; | |
1186 | goto end; | |
1187 | ||
1188 | case REG_STRING: | |
1189 | insn->op = FILTER_OP_NE_STRING; | |
1190 | break; | |
1191 | case REG_S64: | |
1192 | if (reg[REG_R1].type == REG_S64) | |
1193 | insn->op = FILTER_OP_NE_S64; | |
1194 | else | |
1195 | insn->op = FILTER_OP_NE_DOUBLE; | |
1196 | break; | |
1197 | case REG_DOUBLE: | |
1198 | insn->op = FILTER_OP_NE_DOUBLE; | |
1199 | break; | |
1200 | } | |
1201 | reg[REG_R0].type = REG_S64; | |
1202 | next_pc += sizeof(struct binary_op); | |
1203 | break; | |
1204 | } | |
1205 | ||
08c84b15 | 1206 | case FILTER_OP_GT: |
226106c0 MD |
1207 | { |
1208 | struct binary_op *insn = (struct binary_op *) pc; | |
1209 | ||
1210 | switch(reg[REG_R0].type) { | |
1211 | default: | |
1212 | ERR("unknown register type\n"); | |
1213 | ret = -EINVAL; | |
1214 | goto end; | |
1215 | ||
1216 | case REG_STRING: | |
1217 | insn->op = FILTER_OP_GT_STRING; | |
1218 | break; | |
1219 | case REG_S64: | |
1220 | if (reg[REG_R1].type == REG_S64) | |
1221 | insn->op = FILTER_OP_GT_S64; | |
1222 | else | |
1223 | insn->op = FILTER_OP_GT_DOUBLE; | |
1224 | break; | |
1225 | case REG_DOUBLE: | |
1226 | insn->op = FILTER_OP_GT_DOUBLE; | |
1227 | break; | |
1228 | } | |
1229 | reg[REG_R0].type = REG_S64; | |
1230 | next_pc += sizeof(struct binary_op); | |
1231 | break; | |
1232 | } | |
1233 | ||
08c84b15 | 1234 | case FILTER_OP_LT: |
226106c0 MD |
1235 | { |
1236 | struct binary_op *insn = (struct binary_op *) pc; | |
1237 | ||
1238 | switch(reg[REG_R0].type) { | |
1239 | default: | |
1240 | ERR("unknown register type\n"); | |
1241 | ret = -EINVAL; | |
1242 | goto end; | |
1243 | ||
1244 | case REG_STRING: | |
1245 | insn->op = FILTER_OP_LT_STRING; | |
1246 | break; | |
1247 | case REG_S64: | |
1248 | if (reg[REG_R1].type == REG_S64) | |
1249 | insn->op = FILTER_OP_LT_S64; | |
1250 | else | |
1251 | insn->op = FILTER_OP_LT_DOUBLE; | |
1252 | break; | |
1253 | case REG_DOUBLE: | |
1254 | insn->op = FILTER_OP_LT_DOUBLE; | |
1255 | break; | |
1256 | } | |
1257 | reg[REG_R0].type = REG_S64; | |
1258 | next_pc += sizeof(struct binary_op); | |
1259 | break; | |
1260 | } | |
1261 | ||
08c84b15 | 1262 | case FILTER_OP_GE: |
226106c0 MD |
1263 | { |
1264 | struct binary_op *insn = (struct binary_op *) pc; | |
1265 | ||
1266 | switch(reg[REG_R0].type) { | |
1267 | default: | |
1268 | ERR("unknown register type\n"); | |
1269 | ret = -EINVAL; | |
1270 | goto end; | |
1271 | ||
1272 | case REG_STRING: | |
1273 | insn->op = FILTER_OP_GE_STRING; | |
1274 | break; | |
1275 | case REG_S64: | |
1276 | if (reg[REG_R1].type == REG_S64) | |
1277 | insn->op = FILTER_OP_GE_S64; | |
1278 | else | |
1279 | insn->op = FILTER_OP_GE_DOUBLE; | |
1280 | break; | |
1281 | case REG_DOUBLE: | |
1282 | insn->op = FILTER_OP_GE_DOUBLE; | |
1283 | break; | |
1284 | } | |
1285 | reg[REG_R0].type = REG_S64; | |
1286 | next_pc += sizeof(struct binary_op); | |
1287 | break; | |
1288 | } | |
08c84b15 | 1289 | case FILTER_OP_LE: |
226106c0 MD |
1290 | { |
1291 | struct binary_op *insn = (struct binary_op *) pc; | |
1292 | ||
1293 | switch(reg[REG_R0].type) { | |
1294 | default: | |
1295 | ERR("unknown register type\n"); | |
1296 | ret = -EINVAL; | |
1297 | goto end; | |
1298 | ||
1299 | case REG_STRING: | |
1300 | insn->op = FILTER_OP_LE_STRING; | |
1301 | break; | |
1302 | case REG_S64: | |
1303 | if (reg[REG_R1].type == REG_S64) | |
1304 | insn->op = FILTER_OP_LE_S64; | |
1305 | else | |
1306 | insn->op = FILTER_OP_LE_DOUBLE; | |
1307 | break; | |
1308 | case REG_DOUBLE: | |
1309 | insn->op = FILTER_OP_LE_DOUBLE; | |
1310 | break; | |
1311 | } | |
1312 | reg[REG_R0].type = REG_S64; | |
1313 | next_pc += sizeof(struct binary_op); | |
1314 | break; | |
1315 | } | |
1316 | ||
1317 | case FILTER_OP_EQ_STRING: | |
1318 | case FILTER_OP_NE_STRING: | |
1319 | case FILTER_OP_GT_STRING: | |
1320 | case FILTER_OP_LT_STRING: | |
1321 | case FILTER_OP_GE_STRING: | |
1322 | case FILTER_OP_LE_STRING: | |
1323 | case FILTER_OP_EQ_S64: | |
1324 | case FILTER_OP_NE_S64: | |
1325 | case FILTER_OP_GT_S64: | |
1326 | case FILTER_OP_LT_S64: | |
1327 | case FILTER_OP_GE_S64: | |
1328 | case FILTER_OP_LE_S64: | |
1329 | case FILTER_OP_EQ_DOUBLE: | |
1330 | case FILTER_OP_NE_DOUBLE: | |
1331 | case FILTER_OP_GT_DOUBLE: | |
1332 | case FILTER_OP_LT_DOUBLE: | |
1333 | case FILTER_OP_GE_DOUBLE: | |
1334 | case FILTER_OP_LE_DOUBLE: | |
08c84b15 MD |
1335 | { |
1336 | reg[REG_R0].type = REG_S64; | |
1337 | next_pc += sizeof(struct binary_op); | |
1338 | break; | |
1339 | } | |
1340 | ||
226106c0 | 1341 | |
08c84b15 MD |
1342 | /* unary */ |
1343 | case FILTER_OP_UNARY_PLUS: | |
1344 | { | |
1345 | struct unary_op *insn = (struct unary_op *) pc; | |
1346 | ||
1347 | switch(reg[insn->reg].type) { | |
1348 | default: | |
1349 | ERR("unknown register type\n"); | |
1350 | ret = -EINVAL; | |
1351 | goto end; | |
1352 | ||
1353 | case REG_S64: | |
1354 | insn->op = FILTER_OP_UNARY_PLUS_S64; | |
1355 | break; | |
1356 | case REG_DOUBLE: | |
1357 | insn->op = FILTER_OP_UNARY_PLUS_DOUBLE; | |
1358 | break; | |
1359 | } | |
1360 | break; | |
1361 | } | |
1362 | ||
1363 | case FILTER_OP_UNARY_MINUS: | |
1364 | { | |
1365 | struct unary_op *insn = (struct unary_op *) pc; | |
1366 | ||
1367 | switch(reg[insn->reg].type) { | |
1368 | default: | |
1369 | ERR("unknown register type\n"); | |
1370 | ret = -EINVAL; | |
1371 | goto end; | |
1372 | ||
1373 | case REG_S64: | |
1374 | insn->op = FILTER_OP_UNARY_MINUS_S64; | |
1375 | break; | |
1376 | case REG_DOUBLE: | |
1377 | insn->op = FILTER_OP_UNARY_MINUS_DOUBLE; | |
1378 | break; | |
1379 | } | |
1380 | break; | |
1381 | } | |
1382 | ||
1383 | case FILTER_OP_UNARY_NOT: | |
1384 | { | |
1385 | struct unary_op *insn = (struct unary_op *) pc; | |
1386 | ||
1387 | switch(reg[insn->reg].type) { | |
1388 | default: | |
1389 | ERR("unknown register type\n"); | |
1390 | ret = -EINVAL; | |
1391 | goto end; | |
1392 | ||
1393 | case REG_S64: | |
1394 | insn->op = FILTER_OP_UNARY_NOT_S64; | |
1395 | break; | |
1396 | case REG_DOUBLE: | |
1397 | insn->op = FILTER_OP_UNARY_NOT_DOUBLE; | |
1398 | break; | |
1399 | } | |
1400 | break; | |
1401 | } | |
1402 | ||
1403 | case FILTER_OP_UNARY_PLUS_S64: | |
1404 | case FILTER_OP_UNARY_MINUS_S64: | |
1405 | case FILTER_OP_UNARY_NOT_S64: | |
1406 | case FILTER_OP_UNARY_PLUS_DOUBLE: | |
1407 | case FILTER_OP_UNARY_MINUS_DOUBLE: | |
1408 | case FILTER_OP_UNARY_NOT_DOUBLE: | |
1409 | { | |
1410 | next_pc += sizeof(struct unary_op); | |
1411 | break; | |
1412 | } | |
1413 | ||
1414 | /* logical */ | |
1415 | case FILTER_OP_AND: | |
1416 | case FILTER_OP_OR: | |
1417 | { | |
1418 | next_pc += sizeof(struct logical_op); | |
1419 | break; | |
1420 | } | |
1421 | ||
1422 | /* load */ | |
1423 | case FILTER_OP_LOAD_FIELD_REF: | |
1424 | { | |
1425 | ERR("Unknown field ref type\n"); | |
1426 | ret = -EINVAL; | |
1427 | goto end; | |
1428 | } | |
1429 | case FILTER_OP_LOAD_FIELD_REF_STRING: | |
1430 | case FILTER_OP_LOAD_FIELD_REF_SEQUENCE: | |
1431 | { | |
1432 | struct load_op *insn = (struct load_op *) pc; | |
1433 | ||
1434 | reg[insn->reg].type = REG_STRING; | |
1435 | reg[insn->reg].literal = 0; | |
1436 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1437 | break; | |
1438 | } | |
1439 | case FILTER_OP_LOAD_FIELD_REF_S64: | |
1440 | { | |
1441 | struct load_op *insn = (struct load_op *) pc; | |
1442 | ||
1443 | reg[insn->reg].type = REG_S64; | |
1444 | reg[insn->reg].literal = 0; | |
1445 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1446 | break; | |
1447 | } | |
1448 | case FILTER_OP_LOAD_FIELD_REF_DOUBLE: | |
1449 | { | |
1450 | struct load_op *insn = (struct load_op *) pc; | |
1451 | ||
1452 | reg[insn->reg].type = REG_DOUBLE; | |
1453 | reg[insn->reg].literal = 0; | |
1454 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1455 | break; | |
1456 | } | |
1457 | ||
1458 | case FILTER_OP_LOAD_STRING: | |
1459 | { | |
1460 | struct load_op *insn = (struct load_op *) pc; | |
1461 | ||
1462 | reg[insn->reg].type = REG_STRING; | |
1463 | reg[insn->reg].literal = 1; | |
1464 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1465 | break; | |
1466 | } | |
1467 | ||
1468 | case FILTER_OP_LOAD_S64: | |
1469 | { | |
1470 | struct load_op *insn = (struct load_op *) pc; | |
1471 | ||
1472 | reg[insn->reg].type = REG_S64; | |
1473 | reg[insn->reg].literal = 1; | |
1474 | next_pc += sizeof(struct load_op) | |
1475 | + sizeof(struct literal_numeric); | |
1476 | break; | |
1477 | } | |
1478 | ||
1479 | case FILTER_OP_LOAD_DOUBLE: | |
1480 | { | |
1481 | struct load_op *insn = (struct load_op *) pc; | |
1482 | ||
1483 | reg[insn->reg].type = REG_DOUBLE; | |
1484 | reg[insn->reg].literal = 1; | |
1485 | next_pc += sizeof(struct load_op) | |
1486 | + sizeof(struct literal_double); | |
1487 | break; | |
1488 | } | |
1489 | } | |
1490 | } | |
1491 | end: | |
1492 | return ret; | |
1493 | } | |
1494 | ||
1495 | ||
1496 | ||
cd54f6d9 MD |
1497 | static |
1498 | int apply_field_reloc(struct ltt_event *event, | |
1499 | struct bytecode_runtime *runtime, | |
1500 | uint32_t runtime_len, | |
1501 | uint32_t reloc_offset, | |
1502 | const char *field_name) | |
1503 | { | |
1504 | const struct lttng_event_desc *desc; | |
1505 | const struct lttng_event_field *fields, *field = NULL; | |
1506 | unsigned int nr_fields, i; | |
1507 | struct field_ref *field_ref; | |
2f0145d1 | 1508 | struct load_op *op; |
cd54f6d9 MD |
1509 | uint32_t field_offset = 0; |
1510 | ||
a8c27c7c | 1511 | dbg_printf("Apply reloc: %u %s\n", reloc_offset, field_name); |
cd54f6d9 MD |
1512 | |
1513 | /* Ensure that the reloc is within the code */ | |
1514 | if (runtime_len - reloc_offset < sizeof(uint16_t)) | |
1515 | return -EINVAL; | |
1516 | ||
1517 | /* Lookup event by name */ | |
1518 | desc = event->desc; | |
1519 | if (!desc) | |
1520 | return -EINVAL; | |
1521 | fields = desc->fields; | |
1522 | if (!fields) | |
1523 | return -EINVAL; | |
1524 | nr_fields = desc->nr_fields; | |
1525 | for (i = 0; i < nr_fields; i++) { | |
1526 | if (!strcmp(fields[i].name, field_name)) { | |
1527 | field = &fields[i]; | |
1528 | break; | |
1529 | } | |
1530 | /* compute field offset */ | |
1531 | switch (fields[i].type.atype) { | |
1532 | case atype_integer: | |
1533 | case atype_enum: | |
1534 | field_offset += sizeof(int64_t); | |
1535 | break; | |
1536 | case atype_array: | |
1537 | case atype_sequence: | |
1538 | field_offset += sizeof(unsigned long); | |
1539 | field_offset += sizeof(void *); | |
1540 | break; | |
1541 | case atype_string: | |
1542 | field_offset += sizeof(void *); | |
1543 | break; | |
1544 | case atype_float: | |
1545 | field_offset += sizeof(double); | |
da6eed25 | 1546 | break; |
cd54f6d9 MD |
1547 | default: |
1548 | return -EINVAL; | |
1549 | } | |
1550 | } | |
1551 | if (!field) | |
1552 | return -EINVAL; | |
1553 | ||
1554 | /* Check if field offset is too large for 16-bit offset */ | |
1555 | if (field_offset > FILTER_BYTECODE_MAX_LEN) | |
1556 | return -EINVAL; | |
1557 | ||
1558 | /* set type */ | |
2f0145d1 MD |
1559 | op = (struct load_op *) &runtime->data[reloc_offset]; |
1560 | field_ref = (struct field_ref *) op->data; | |
cd54f6d9 MD |
1561 | switch (field->type.atype) { |
1562 | case atype_integer: | |
1563 | case atype_enum: | |
2f0145d1 | 1564 | op->op = FILTER_OP_LOAD_FIELD_REF_S64; |
cd54f6d9 MD |
1565 | break; |
1566 | case atype_array: | |
1567 | case atype_sequence: | |
2f0145d1 | 1568 | op->op = FILTER_OP_LOAD_FIELD_REF_SEQUENCE; |
cd54f6d9 MD |
1569 | break; |
1570 | case atype_string: | |
2f0145d1 | 1571 | op->op = FILTER_OP_LOAD_FIELD_REF_STRING; |
cd54f6d9 MD |
1572 | break; |
1573 | case atype_float: | |
2f0145d1 | 1574 | op->op = FILTER_OP_LOAD_FIELD_REF_DOUBLE; |
da6eed25 | 1575 | break; |
cd54f6d9 MD |
1576 | default: |
1577 | return -EINVAL; | |
1578 | } | |
1579 | /* set offset */ | |
1580 | field_ref->offset = (uint16_t) field_offset; | |
2d78951a MD |
1581 | return 0; |
1582 | } | |
1583 | ||
cd54f6d9 MD |
1584 | /* |
1585 | * Take a bytecode with reloc table and link it to an event to create a | |
1586 | * bytecode runtime. | |
1587 | */ | |
2d78951a MD |
1588 | static |
1589 | int _lttng_filter_event_link_bytecode(struct ltt_event *event, | |
1590 | struct lttng_ust_filter_bytecode *filter_bytecode) | |
1591 | { | |
cd54f6d9 MD |
1592 | int ret, offset, next_offset; |
1593 | struct bytecode_runtime *runtime = NULL; | |
1594 | size_t runtime_alloc_len; | |
1595 | ||
2d78951a MD |
1596 | if (!filter_bytecode) |
1597 | return 0; | |
cd54f6d9 MD |
1598 | /* Even is not connected to any description */ |
1599 | if (!event->desc) | |
1600 | return 0; | |
1601 | /* Bytecode already linked */ | |
1602 | if (event->filter || event->filter_data) | |
1603 | return 0; | |
2d78951a | 1604 | |
a8c27c7c | 1605 | dbg_printf("Linking\n"); |
cd54f6d9 MD |
1606 | |
1607 | /* We don't need the reloc table in the runtime */ | |
1608 | runtime_alloc_len = sizeof(*runtime) + filter_bytecode->reloc_offset; | |
1609 | runtime = zmalloc(runtime_alloc_len); | |
1610 | if (!runtime) { | |
1611 | ret = -ENOMEM; | |
1612 | goto link_error; | |
1613 | } | |
1614 | runtime->len = filter_bytecode->reloc_offset; | |
1615 | /* copy original bytecode */ | |
1616 | memcpy(runtime->data, filter_bytecode->data, runtime->len); | |
1617 | /* | |
1618 | * apply relocs. Those are a uint16_t (offset in bytecode) | |
1619 | * followed by a string (field name). | |
1620 | */ | |
cd54f6d9 MD |
1621 | for (offset = filter_bytecode->reloc_offset; |
1622 | offset < filter_bytecode->len; | |
1623 | offset = next_offset) { | |
1624 | uint16_t reloc_offset = | |
1625 | *(uint16_t *) &filter_bytecode->data[offset]; | |
1626 | const char *field_name = | |
1627 | (const char *) &filter_bytecode->data[offset + sizeof(uint16_t)]; | |
1628 | ||
1629 | ret = apply_field_reloc(event, runtime, runtime->len, reloc_offset, field_name); | |
1630 | if (ret) { | |
1631 | goto link_error; | |
1632 | } | |
1633 | next_offset = offset + sizeof(uint16_t) + strlen(field_name) + 1; | |
1634 | } | |
9522a886 MD |
1635 | /* Validate bytecode */ |
1636 | ret = lttng_filter_validate_bytecode(runtime); | |
1637 | if (ret) { | |
1638 | goto link_error; | |
1639 | } | |
08c84b15 MD |
1640 | /* Specialize bytecode */ |
1641 | ret = lttng_filter_specialize_bytecode(runtime); | |
1642 | if (ret) { | |
1643 | goto link_error; | |
1644 | } | |
cd54f6d9 | 1645 | event->filter_data = runtime; |
2d78951a | 1646 | event->filter = lttng_filter_interpret_bytecode; |
2d78951a | 1647 | return 0; |
cd54f6d9 MD |
1648 | |
1649 | link_error: | |
1650 | event->filter = lttng_filter_false; | |
1651 | free(runtime); | |
1652 | return ret; | |
2d78951a MD |
1653 | } |
1654 | ||
1655 | void lttng_filter_event_link_bytecode(struct ltt_event *event, | |
1656 | struct lttng_ust_filter_bytecode *filter_bytecode) | |
1657 | { | |
1658 | int ret; | |
1659 | ||
cd54f6d9 | 1660 | ret = _lttng_filter_event_link_bytecode(event, filter_bytecode); |
2d78951a MD |
1661 | if (ret) { |
1662 | fprintf(stderr, "[lttng filter] error linking event bytecode\n"); | |
1663 | } | |
1664 | } | |
1665 | ||
1666 | /* | |
1667 | * Link bytecode to all events for a wildcard. Skips events that already | |
1668 | * have a bytecode linked. | |
1669 | * We do not set each event's filter_bytecode field, because they do not | |
1670 | * own the filter_bytecode: the wildcard owns it. | |
1671 | */ | |
1672 | void lttng_filter_wildcard_link_bytecode(struct session_wildcard *wildcard) | |
1673 | { | |
1674 | struct ltt_event *event; | |
1675 | int ret; | |
1676 | ||
1677 | if (!wildcard->filter_bytecode) | |
1678 | return; | |
1679 | ||
1680 | cds_list_for_each_entry(event, &wildcard->events, wildcard_list) { | |
1681 | if (event->filter) | |
1682 | continue; | |
1683 | ret = _lttng_filter_event_link_bytecode(event, | |
1684 | wildcard->filter_bytecode); | |
1685 | if (ret) { | |
1686 | fprintf(stderr, "[lttng filter] error linking wildcard bytecode\n"); | |
1687 | } | |
1688 | ||
1689 | } | |
1690 | return; | |
1691 | } | |
1692 | ||
1693 | /* | |
1694 | * Need to attach filter to an event before starting tracing for the | |
cd54f6d9 | 1695 | * session. We own the filter_bytecode if we return success. |
2d78951a MD |
1696 | */ |
1697 | int lttng_filter_event_attach_bytecode(struct ltt_event *event, | |
1698 | struct lttng_ust_filter_bytecode *filter_bytecode) | |
1699 | { | |
2d78951a MD |
1700 | if (event->chan->session->been_active) |
1701 | return -EPERM; | |
1702 | if (event->filter_bytecode) | |
1703 | return -EEXIST; | |
cd54f6d9 | 1704 | event->filter_bytecode = filter_bytecode; |
2d78951a MD |
1705 | return 0; |
1706 | } | |
1707 | ||
1708 | /* | |
1709 | * Need to attach filter to a wildcard before starting tracing for the | |
cd54f6d9 | 1710 | * session. We own the filter_bytecode if we return success. |
2d78951a MD |
1711 | */ |
1712 | int lttng_filter_wildcard_attach_bytecode(struct session_wildcard *wildcard, | |
1713 | struct lttng_ust_filter_bytecode *filter_bytecode) | |
1714 | { | |
2d78951a MD |
1715 | if (wildcard->chan->session->been_active) |
1716 | return -EPERM; | |
1717 | if (wildcard->filter_bytecode) | |
1718 | return -EEXIST; | |
cd54f6d9 | 1719 | wildcard->filter_bytecode = filter_bytecode; |
2d78951a MD |
1720 | return 0; |
1721 | } |