Commit | Line | Data |
---|---|---|
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 | ||
f488575f | 23 | #include <urcu/rculist.h> |
97b58163 | 24 | #include "lttng-filter.h" |
cd54f6d9 MD |
25 | |
26 | static const char *opnames[] = { | |
27 | [ FILTER_OP_UNKNOWN ] = "UNKNOWN", | |
28 | ||
29 | [ FILTER_OP_RETURN ] = "RETURN", | |
30 | ||
31 | /* binary */ | |
32 | [ FILTER_OP_MUL ] = "MUL", | |
33 | [ FILTER_OP_DIV ] = "DIV", | |
34 | [ FILTER_OP_MOD ] = "MOD", | |
35 | [ FILTER_OP_PLUS ] = "PLUS", | |
36 | [ FILTER_OP_MINUS ] = "MINUS", | |
37 | [ FILTER_OP_RSHIFT ] = "RSHIFT", | |
38 | [ FILTER_OP_LSHIFT ] = "LSHIFT", | |
39 | [ FILTER_OP_BIN_AND ] = "BIN_AND", | |
40 | [ FILTER_OP_BIN_OR ] = "BIN_OR", | |
41 | [ FILTER_OP_BIN_XOR ] = "BIN_XOR", | |
226106c0 MD |
42 | |
43 | /* binary comparators */ | |
cd54f6d9 MD |
44 | [ FILTER_OP_EQ ] = "EQ", |
45 | [ FILTER_OP_NE ] = "NE", | |
46 | [ FILTER_OP_GT ] = "GT", | |
47 | [ FILTER_OP_LT ] = "LT", | |
48 | [ FILTER_OP_GE ] = "GE", | |
49 | [ FILTER_OP_LE ] = "LE", | |
50 | ||
226106c0 MD |
51 | /* string binary comparators */ |
52 | [ FILTER_OP_EQ_STRING ] = "EQ_STRING", | |
53 | [ FILTER_OP_NE_STRING ] = "NE_STRING", | |
54 | [ FILTER_OP_GT_STRING ] = "GT_STRING", | |
55 | [ FILTER_OP_LT_STRING ] = "LT_STRING", | |
56 | [ FILTER_OP_GE_STRING ] = "GE_STRING", | |
57 | [ FILTER_OP_LE_STRING ] = "LE_STRING", | |
58 | ||
59 | /* s64 binary comparators */ | |
60 | [ FILTER_OP_EQ_S64 ] = "EQ_S64", | |
61 | [ FILTER_OP_NE_S64 ] = "NE_S64", | |
62 | [ FILTER_OP_GT_S64 ] = "GT_S64", | |
63 | [ FILTER_OP_LT_S64 ] = "LT_S64", | |
64 | [ FILTER_OP_GE_S64 ] = "GE_S64", | |
65 | [ FILTER_OP_LE_S64 ] = "LE_S64", | |
66 | ||
67 | /* double binary comparators */ | |
68 | [ FILTER_OP_EQ_DOUBLE ] = "EQ_DOUBLE", | |
69 | [ FILTER_OP_NE_DOUBLE ] = "NE_DOUBLE", | |
70 | [ FILTER_OP_GT_DOUBLE ] = "GT_DOUBLE", | |
71 | [ FILTER_OP_LT_DOUBLE ] = "LT_DOUBLE", | |
72 | [ FILTER_OP_GE_DOUBLE ] = "GE_DOUBLE", | |
73 | [ FILTER_OP_LE_DOUBLE ] = "LE_DOUBLE", | |
74 | ||
1e5f62b4 MD |
75 | /* Mixed S64-double binary comparators */ |
76 | [ FILTER_OP_EQ_DOUBLE_S64 ] = "EQ_DOUBLE_S64", | |
77 | [ FILTER_OP_NE_DOUBLE_S64 ] = "NE_DOUBLE_S64", | |
78 | [ FILTER_OP_GT_DOUBLE_S64 ] = "GT_DOUBLE_S64", | |
79 | [ FILTER_OP_LT_DOUBLE_S64 ] = "LT_DOUBLE_S64", | |
80 | [ FILTER_OP_GE_DOUBLE_S64 ] = "GE_DOUBLE_S64", | |
81 | [ FILTER_OP_LE_DOUBLE_S64 ] = "LE_DOUBLE_S64", | |
82 | ||
83 | [ FILTER_OP_EQ_S64_DOUBLE ] = "EQ_S64_DOUBLE", | |
84 | [ FILTER_OP_NE_S64_DOUBLE ] = "NE_S64_DOUBLE", | |
85 | [ FILTER_OP_GT_S64_DOUBLE ] = "GT_S64_DOUBLE", | |
86 | [ FILTER_OP_LT_S64_DOUBLE ] = "LT_S64_DOUBLE", | |
87 | [ FILTER_OP_GE_S64_DOUBLE ] = "GE_S64_DOUBLE", | |
88 | [ FILTER_OP_LE_S64_DOUBLE ] = "LE_S64_DOUBLE", | |
226106c0 | 89 | |
cd54f6d9 MD |
90 | /* unary */ |
91 | [ FILTER_OP_UNARY_PLUS ] = "UNARY_PLUS", | |
92 | [ FILTER_OP_UNARY_MINUS ] = "UNARY_MINUS", | |
93 | [ FILTER_OP_UNARY_NOT ] = "UNARY_NOT", | |
226106c0 MD |
94 | [ FILTER_OP_UNARY_PLUS_S64 ] = "UNARY_PLUS_S64", |
95 | [ FILTER_OP_UNARY_MINUS_S64 ] = "UNARY_MINUS_S64", | |
96 | [ FILTER_OP_UNARY_NOT_S64 ] = "UNARY_NOT_S64", | |
97 | [ FILTER_OP_UNARY_PLUS_DOUBLE ] = "UNARY_PLUS_DOUBLE", | |
98 | [ FILTER_OP_UNARY_MINUS_DOUBLE ] = "UNARY_MINUS_DOUBLE", | |
99 | [ FILTER_OP_UNARY_NOT_DOUBLE ] = "UNARY_NOT_DOUBLE", | |
cd54f6d9 MD |
100 | |
101 | /* logical */ | |
102 | [ FILTER_OP_AND ] = "AND", | |
103 | [ FILTER_OP_OR ] = "OR", | |
104 | ||
77aa5901 | 105 | /* load field ref */ |
cd54f6d9 | 106 | [ FILTER_OP_LOAD_FIELD_REF ] = "LOAD_FIELD_REF", |
2f0145d1 MD |
107 | [ FILTER_OP_LOAD_FIELD_REF_STRING ] = "LOAD_FIELD_REF_STRING", |
108 | [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = "LOAD_FIELD_REF_SEQUENCE", | |
109 | [ FILTER_OP_LOAD_FIELD_REF_S64 ] = "LOAD_FIELD_REF_S64", | |
110 | [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = "LOAD_FIELD_REF_DOUBLE", | |
111 | ||
77aa5901 | 112 | /* load from immediate operand */ |
cd54f6d9 MD |
113 | [ FILTER_OP_LOAD_STRING ] = "LOAD_STRING", |
114 | [ FILTER_OP_LOAD_S64 ] = "LOAD_S64", | |
da6eed25 | 115 | [ FILTER_OP_LOAD_DOUBLE ] = "LOAD_DOUBLE", |
49905038 MD |
116 | |
117 | /* cast */ | |
118 | [ FILTER_OP_CAST_TO_S64 ] = "CAST_TO_S64", | |
119 | [ FILTER_OP_CAST_DOUBLE_TO_S64 ] = "CAST_DOUBLE_TO_S64", | |
120 | [ FILTER_OP_CAST_NOP ] = "CAST_NOP", | |
77aa5901 MD |
121 | |
122 | /* get context ref */ | |
123 | [ FILTER_OP_GET_CONTEXT_REF ] = "GET_CONTEXT_REF", | |
124 | [ FILTER_OP_GET_CONTEXT_REF_STRING ] = "GET_CONTEXT_REF_STRING", | |
125 | [ FILTER_OP_GET_CONTEXT_REF_S64 ] = "GET_CONTEXT_REF_S64", | |
126 | [ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = "GET_CONTEXT_REF_DOUBLE", | |
cd54f6d9 MD |
127 | }; |
128 | ||
cd54f6d9 MD |
129 | const char *print_op(enum filter_op op) |
130 | { | |
131 | if (op >= NR_FILTER_OPS) | |
132 | return "UNKNOWN"; | |
133 | else | |
134 | return opnames[op]; | |
135 | } | |
136 | ||
cd54f6d9 | 137 | static |
7dd08bec | 138 | int apply_field_reloc(struct lttng_event *event, |
cd54f6d9 MD |
139 | struct bytecode_runtime *runtime, |
140 | uint32_t runtime_len, | |
141 | uint32_t reloc_offset, | |
142 | const char *field_name) | |
143 | { | |
144 | const struct lttng_event_desc *desc; | |
145 | const struct lttng_event_field *fields, *field = NULL; | |
146 | unsigned int nr_fields, i; | |
147 | struct field_ref *field_ref; | |
2f0145d1 | 148 | struct load_op *op; |
cd54f6d9 MD |
149 | uint32_t field_offset = 0; |
150 | ||
77aa5901 | 151 | dbg_printf("Apply field reloc: %u %s\n", reloc_offset, field_name); |
cd54f6d9 MD |
152 | |
153 | /* Lookup event by name */ | |
154 | desc = event->desc; | |
155 | if (!desc) | |
156 | return -EINVAL; | |
157 | fields = desc->fields; | |
158 | if (!fields) | |
159 | return -EINVAL; | |
160 | nr_fields = desc->nr_fields; | |
161 | for (i = 0; i < nr_fields; i++) { | |
162 | if (!strcmp(fields[i].name, field_name)) { | |
163 | field = &fields[i]; | |
164 | break; | |
165 | } | |
166 | /* compute field offset */ | |
167 | switch (fields[i].type.atype) { | |
168 | case atype_integer: | |
169 | case atype_enum: | |
170 | field_offset += sizeof(int64_t); | |
171 | break; | |
172 | case atype_array: | |
173 | case atype_sequence: | |
174 | field_offset += sizeof(unsigned long); | |
175 | field_offset += sizeof(void *); | |
176 | break; | |
177 | case atype_string: | |
178 | field_offset += sizeof(void *); | |
179 | break; | |
180 | case atype_float: | |
181 | field_offset += sizeof(double); | |
da6eed25 | 182 | break; |
cd54f6d9 MD |
183 | default: |
184 | return -EINVAL; | |
185 | } | |
186 | } | |
187 | if (!field) | |
188 | return -EINVAL; | |
189 | ||
190 | /* Check if field offset is too large for 16-bit offset */ | |
5b4839a8 | 191 | if (field_offset > FILTER_BYTECODE_MAX_LEN - 1) |
cd54f6d9 MD |
192 | return -EINVAL; |
193 | ||
194 | /* set type */ | |
2f0145d1 MD |
195 | op = (struct load_op *) &runtime->data[reloc_offset]; |
196 | field_ref = (struct field_ref *) op->data; | |
cd54f6d9 MD |
197 | switch (field->type.atype) { |
198 | case atype_integer: | |
199 | case atype_enum: | |
2f0145d1 | 200 | op->op = FILTER_OP_LOAD_FIELD_REF_S64; |
cd54f6d9 MD |
201 | break; |
202 | case atype_array: | |
203 | case atype_sequence: | |
2f0145d1 | 204 | op->op = FILTER_OP_LOAD_FIELD_REF_SEQUENCE; |
cd54f6d9 MD |
205 | break; |
206 | case atype_string: | |
2f0145d1 | 207 | op->op = FILTER_OP_LOAD_FIELD_REF_STRING; |
cd54f6d9 MD |
208 | break; |
209 | case atype_float: | |
2f0145d1 | 210 | op->op = FILTER_OP_LOAD_FIELD_REF_DOUBLE; |
da6eed25 | 211 | break; |
cd54f6d9 MD |
212 | default: |
213 | return -EINVAL; | |
214 | } | |
215 | /* set offset */ | |
216 | field_ref->offset = (uint16_t) field_offset; | |
2d78951a MD |
217 | return 0; |
218 | } | |
219 | ||
77aa5901 MD |
220 | static |
221 | int apply_context_reloc(struct lttng_event *event, | |
222 | struct bytecode_runtime *runtime, | |
223 | uint32_t runtime_len, | |
224 | uint32_t reloc_offset, | |
225 | const char *context_name) | |
226 | { | |
227 | struct field_ref *field_ref; | |
228 | struct load_op *op; | |
229 | struct lttng_ctx_field *ctx_field; | |
230 | int idx; | |
53569322 | 231 | struct lttng_session *session = runtime->p.session; |
77aa5901 MD |
232 | |
233 | dbg_printf("Apply context reloc: %u %s\n", reloc_offset, context_name); | |
234 | ||
235 | /* Get context index */ | |
53569322 MD |
236 | idx = lttng_get_context_index(session->ctx, context_name); |
237 | if (idx < 0) { | |
238 | if (lttng_context_is_app(context_name)) { | |
239 | int ret; | |
240 | ||
241 | ret = lttng_ust_add_app_context_to_ctx_rcu(context_name, | |
242 | &session->ctx); | |
243 | if (ret) | |
244 | return ret; | |
245 | idx = lttng_get_context_index(session->ctx, | |
246 | context_name); | |
247 | if (idx < 0) | |
248 | return -ENOENT; | |
249 | } else { | |
250 | return -ENOENT; | |
251 | } | |
252 | } | |
77aa5901 MD |
253 | /* Check if idx is too large for 16-bit offset */ |
254 | if (idx > FILTER_BYTECODE_MAX_LEN - 1) | |
255 | return -EINVAL; | |
256 | ||
257 | /* Get context return type */ | |
53569322 | 258 | ctx_field = &session->ctx->fields[idx]; |
77aa5901 MD |
259 | op = (struct load_op *) &runtime->data[reloc_offset]; |
260 | field_ref = (struct field_ref *) op->data; | |
261 | switch (ctx_field->event_field.type.atype) { | |
262 | case atype_integer: | |
263 | case atype_enum: | |
264 | op->op = FILTER_OP_GET_CONTEXT_REF_S64; | |
265 | break; | |
266 | /* Sequence and array supported as string */ | |
267 | case atype_string: | |
268 | case atype_array: | |
269 | case atype_sequence: | |
270 | op->op = FILTER_OP_GET_CONTEXT_REF_STRING; | |
271 | break; | |
272 | case atype_float: | |
273 | op->op = FILTER_OP_GET_CONTEXT_REF_DOUBLE; | |
274 | break; | |
53569322 MD |
275 | case atype_dynamic: |
276 | op->op = FILTER_OP_GET_CONTEXT_REF; | |
277 | break; | |
77aa5901 MD |
278 | default: |
279 | return -EINVAL; | |
280 | } | |
281 | /* set offset to context index within channel contexts */ | |
282 | field_ref->offset = (uint16_t) idx; | |
283 | return 0; | |
284 | } | |
285 | ||
286 | static | |
287 | int apply_reloc(struct lttng_event *event, | |
288 | struct bytecode_runtime *runtime, | |
289 | uint32_t runtime_len, | |
290 | uint32_t reloc_offset, | |
291 | const char *name) | |
292 | { | |
293 | struct load_op *op; | |
294 | ||
295 | dbg_printf("Apply reloc: %u %s\n", reloc_offset, name); | |
296 | ||
297 | /* Ensure that the reloc is within the code */ | |
298 | if (runtime_len - reloc_offset < sizeof(uint16_t)) | |
299 | return -EINVAL; | |
300 | ||
301 | op = (struct load_op *) &runtime->data[reloc_offset]; | |
302 | switch (op->op) { | |
303 | case FILTER_OP_LOAD_FIELD_REF: | |
304 | return apply_field_reloc(event, runtime, runtime_len, | |
305 | reloc_offset, name); | |
306 | case FILTER_OP_GET_CONTEXT_REF: | |
307 | return apply_context_reloc(event, runtime, runtime_len, | |
308 | reloc_offset, name); | |
309 | default: | |
310 | ERR("Unknown reloc op type %u\n", op->op); | |
311 | return -EINVAL; | |
312 | } | |
313 | return 0; | |
314 | } | |
315 | ||
f488575f MD |
316 | static |
317 | int bytecode_is_linked(struct lttng_ust_filter_bytecode_node *filter_bytecode, | |
7dd08bec | 318 | struct lttng_event *event) |
f488575f MD |
319 | { |
320 | struct lttng_bytecode_runtime *bc_runtime; | |
321 | ||
e58095ef MD |
322 | cds_list_for_each_entry(bc_runtime, |
323 | &event->bytecode_runtime_head, node) { | |
f488575f MD |
324 | if (bc_runtime->bc == filter_bytecode) |
325 | return 1; | |
326 | } | |
327 | return 0; | |
328 | } | |
329 | ||
cd54f6d9 MD |
330 | /* |
331 | * Take a bytecode with reloc table and link it to an event to create a | |
332 | * bytecode runtime. | |
333 | */ | |
2d78951a | 334 | static |
7dd08bec | 335 | int _lttng_filter_event_link_bytecode(struct lttng_event *event, |
e58095ef MD |
336 | struct lttng_ust_filter_bytecode_node *filter_bytecode, |
337 | struct cds_list_head *insert_loc) | |
2d78951a | 338 | { |
cd54f6d9 MD |
339 | int ret, offset, next_offset; |
340 | struct bytecode_runtime *runtime = NULL; | |
341 | size_t runtime_alloc_len; | |
342 | ||
2d78951a MD |
343 | if (!filter_bytecode) |
344 | return 0; | |
cd54f6d9 | 345 | /* Bytecode already linked */ |
f488575f | 346 | if (bytecode_is_linked(filter_bytecode, event)) |
cd54f6d9 | 347 | return 0; |
2d78951a | 348 | |
f488575f | 349 | dbg_printf("Linking...\n"); |
cd54f6d9 MD |
350 | |
351 | /* We don't need the reloc table in the runtime */ | |
f488575f | 352 | runtime_alloc_len = sizeof(*runtime) + filter_bytecode->bc.reloc_offset; |
cd54f6d9 MD |
353 | runtime = zmalloc(runtime_alloc_len); |
354 | if (!runtime) { | |
355 | ret = -ENOMEM; | |
e0a7d7ab | 356 | goto alloc_error; |
cd54f6d9 | 357 | } |
f488575f | 358 | runtime->p.bc = filter_bytecode; |
53569322 | 359 | runtime->p.session = event->chan->session; |
f488575f | 360 | runtime->len = filter_bytecode->bc.reloc_offset; |
cd54f6d9 | 361 | /* copy original bytecode */ |
f488575f | 362 | memcpy(runtime->data, filter_bytecode->bc.data, runtime->len); |
cd54f6d9 MD |
363 | /* |
364 | * apply relocs. Those are a uint16_t (offset in bytecode) | |
365 | * followed by a string (field name). | |
366 | */ | |
f488575f MD |
367 | for (offset = filter_bytecode->bc.reloc_offset; |
368 | offset < filter_bytecode->bc.len; | |
cd54f6d9 MD |
369 | offset = next_offset) { |
370 | uint16_t reloc_offset = | |
f488575f | 371 | *(uint16_t *) &filter_bytecode->bc.data[offset]; |
77aa5901 | 372 | const char *name = |
f488575f | 373 | (const char *) &filter_bytecode->bc.data[offset + sizeof(uint16_t)]; |
cd54f6d9 | 374 | |
77aa5901 | 375 | ret = apply_reloc(event, runtime, runtime->len, reloc_offset, name); |
cd54f6d9 MD |
376 | if (ret) { |
377 | goto link_error; | |
378 | } | |
77aa5901 | 379 | next_offset = offset + sizeof(uint16_t) + strlen(name) + 1; |
cd54f6d9 | 380 | } |
9522a886 MD |
381 | /* Validate bytecode */ |
382 | ret = lttng_filter_validate_bytecode(runtime); | |
383 | if (ret) { | |
384 | goto link_error; | |
385 | } | |
08c84b15 MD |
386 | /* Specialize bytecode */ |
387 | ret = lttng_filter_specialize_bytecode(runtime); | |
388 | if (ret) { | |
389 | goto link_error; | |
390 | } | |
f488575f | 391 | runtime->p.filter = lttng_filter_interpret_bytecode; |
21af05a9 | 392 | runtime->p.link_failed = 0; |
e58095ef | 393 | cds_list_add_rcu(&runtime->p.node, insert_loc); |
f488575f | 394 | dbg_printf("Linking successful.\n"); |
2d78951a | 395 | return 0; |
cd54f6d9 MD |
396 | |
397 | link_error: | |
f488575f | 398 | runtime->p.filter = lttng_filter_false; |
21af05a9 | 399 | runtime->p.link_failed = 1; |
e58095ef | 400 | cds_list_add_rcu(&runtime->p.node, insert_loc); |
e0a7d7ab | 401 | alloc_error: |
f488575f | 402 | dbg_printf("Linking failed.\n"); |
cd54f6d9 | 403 | return ret; |
2d78951a MD |
404 | } |
405 | ||
e58095ef | 406 | void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime) |
2d78951a | 407 | { |
e58095ef | 408 | struct lttng_ust_filter_bytecode_node *bc = runtime->bc; |
f488575f | 409 | |
21af05a9 | 410 | if (!bc->enabler->enabled || runtime->link_failed) |
e58095ef | 411 | runtime->filter = lttng_filter_false; |
21af05a9 MD |
412 | else |
413 | runtime->filter = lttng_filter_interpret_bytecode; | |
2d78951a MD |
414 | } |
415 | ||
416 | /* | |
e58095ef | 417 | * Link bytecode for all enablers referenced by an event. |
2d78951a | 418 | */ |
e58095ef MD |
419 | void lttng_enabler_event_link_bytecode(struct lttng_event *event, |
420 | struct lttng_enabler *enabler) | |
2d78951a | 421 | { |
e58095ef MD |
422 | struct lttng_ust_filter_bytecode_node *bc; |
423 | struct lttng_bytecode_runtime *runtime; | |
424 | ||
425 | /* Can only be called for events with desc attached */ | |
426 | assert(event->desc); | |
427 | ||
428 | /* Link each bytecode. */ | |
429 | cds_list_for_each_entry(bc, &enabler->filter_bytecode_head, node) { | |
430 | int found = 0, ret; | |
431 | struct cds_list_head *insert_loc; | |
432 | ||
433 | cds_list_for_each_entry(runtime, | |
434 | &event->bytecode_runtime_head, node) { | |
435 | if (runtime->bc == bc) { | |
436 | found = 1; | |
437 | break; | |
438 | } | |
439 | } | |
440 | /* Skip bytecode already linked */ | |
441 | if (found) | |
442 | continue; | |
443 | ||
444 | /* | |
445 | * Insert at specified priority (seqnum) in increasing | |
446 | * order. | |
447 | */ | |
448 | cds_list_for_each_entry_reverse(runtime, | |
449 | &event->bytecode_runtime_head, node) { | |
450 | if (runtime->bc->bc.seqnum < bc->bc.seqnum) { | |
451 | /* insert here */ | |
452 | insert_loc = &runtime->node; | |
453 | goto add_within; | |
454 | } | |
455 | } | |
456 | /* Add to head to list */ | |
457 | insert_loc = &event->bytecode_runtime_head; | |
458 | add_within: | |
f488575f | 459 | dbg_printf("linking bytecode\n"); |
e58095ef MD |
460 | ret = _lttng_filter_event_link_bytecode(event, bc, |
461 | insert_loc); | |
462 | if (ret) { | |
463 | dbg_printf("[lttng filter] warning: cannot link event bytecode\n"); | |
464 | } | |
2d78951a | 465 | } |
2d78951a MD |
466 | } |
467 | ||
468 | /* | |
e58095ef | 469 | * We own the filter_bytecode if we return success. |
2d78951a | 470 | */ |
e58095ef | 471 | int lttng_filter_enabler_attach_bytecode(struct lttng_enabler *enabler, |
f488575f | 472 | struct lttng_ust_filter_bytecode_node *filter_bytecode) |
2d78951a | 473 | { |
e58095ef | 474 | cds_list_add(&filter_bytecode->node, &enabler->filter_bytecode_head); |
2d78951a MD |
475 | return 0; |
476 | } | |
f488575f | 477 | |
e58095ef | 478 | void lttng_free_enabler_filter_bytecode(struct lttng_enabler *enabler) |
f488575f MD |
479 | { |
480 | struct lttng_ust_filter_bytecode_node *filter_bytecode, *tmp; | |
481 | ||
482 | cds_list_for_each_entry_safe(filter_bytecode, tmp, | |
e58095ef | 483 | &enabler->filter_bytecode_head, node) { |
f488575f MD |
484 | free(filter_bytecode); |
485 | } | |
486 | } | |
487 | ||
7dd08bec | 488 | void lttng_free_event_filter_runtime(struct lttng_event *event) |
f488575f MD |
489 | { |
490 | struct bytecode_runtime *runtime, *tmp; | |
491 | ||
492 | cds_list_for_each_entry_safe(runtime, tmp, | |
e58095ef | 493 | &event->bytecode_runtime_head, p.node) { |
f488575f MD |
494 | free(runtime); |
495 | } | |
496 | } |