Commit | Line | Data |
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2d78951a MD |
1 | /* |
2 | * lttng-filter.c | |
3 | * | |
4 | * LTTng UST filter code. | |
5 | * | |
7e50015d | 6 | * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
2d78951a | 7 | * |
7e50015d MD |
8 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
9 | * of this software and associated documentation files (the "Software"), to deal | |
10 | * in the Software without restriction, including without limitation the rights | |
11 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
12 | * copies of the Software, and to permit persons to whom the Software is | |
13 | * furnished to do so, subject to the following conditions: | |
2d78951a | 14 | * |
7e50015d MD |
15 | * The above copyright notice and this permission notice shall be included in |
16 | * all copies or substantial portions of the Software. | |
2d78951a | 17 | * |
7e50015d MD |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
21 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
22 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
23 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
24 | * SOFTWARE. | |
2d78951a MD |
25 | */ |
26 | ||
3fbec7dc | 27 | #define _LGPL_SOURCE |
f488575f | 28 | #include <urcu/rculist.h> |
97b58163 | 29 | #include "lttng-filter.h" |
cd54f6d9 MD |
30 | |
31 | static const char *opnames[] = { | |
32 | [ FILTER_OP_UNKNOWN ] = "UNKNOWN", | |
33 | ||
34 | [ FILTER_OP_RETURN ] = "RETURN", | |
35 | ||
36 | /* binary */ | |
37 | [ FILTER_OP_MUL ] = "MUL", | |
38 | [ FILTER_OP_DIV ] = "DIV", | |
39 | [ FILTER_OP_MOD ] = "MOD", | |
40 | [ FILTER_OP_PLUS ] = "PLUS", | |
41 | [ FILTER_OP_MINUS ] = "MINUS", | |
42 | [ FILTER_OP_RSHIFT ] = "RSHIFT", | |
43 | [ FILTER_OP_LSHIFT ] = "LSHIFT", | |
44 | [ FILTER_OP_BIN_AND ] = "BIN_AND", | |
45 | [ FILTER_OP_BIN_OR ] = "BIN_OR", | |
46 | [ FILTER_OP_BIN_XOR ] = "BIN_XOR", | |
226106c0 MD |
47 | |
48 | /* binary comparators */ | |
cd54f6d9 MD |
49 | [ FILTER_OP_EQ ] = "EQ", |
50 | [ FILTER_OP_NE ] = "NE", | |
51 | [ FILTER_OP_GT ] = "GT", | |
52 | [ FILTER_OP_LT ] = "LT", | |
53 | [ FILTER_OP_GE ] = "GE", | |
54 | [ FILTER_OP_LE ] = "LE", | |
55 | ||
226106c0 MD |
56 | /* string binary comparators */ |
57 | [ FILTER_OP_EQ_STRING ] = "EQ_STRING", | |
58 | [ FILTER_OP_NE_STRING ] = "NE_STRING", | |
59 | [ FILTER_OP_GT_STRING ] = "GT_STRING", | |
60 | [ FILTER_OP_LT_STRING ] = "LT_STRING", | |
61 | [ FILTER_OP_GE_STRING ] = "GE_STRING", | |
62 | [ FILTER_OP_LE_STRING ] = "LE_STRING", | |
63 | ||
64 | /* s64 binary comparators */ | |
65 | [ FILTER_OP_EQ_S64 ] = "EQ_S64", | |
66 | [ FILTER_OP_NE_S64 ] = "NE_S64", | |
67 | [ FILTER_OP_GT_S64 ] = "GT_S64", | |
68 | [ FILTER_OP_LT_S64 ] = "LT_S64", | |
69 | [ FILTER_OP_GE_S64 ] = "GE_S64", | |
70 | [ FILTER_OP_LE_S64 ] = "LE_S64", | |
71 | ||
72 | /* double binary comparators */ | |
73 | [ FILTER_OP_EQ_DOUBLE ] = "EQ_DOUBLE", | |
74 | [ FILTER_OP_NE_DOUBLE ] = "NE_DOUBLE", | |
75 | [ FILTER_OP_GT_DOUBLE ] = "GT_DOUBLE", | |
76 | [ FILTER_OP_LT_DOUBLE ] = "LT_DOUBLE", | |
77 | [ FILTER_OP_GE_DOUBLE ] = "GE_DOUBLE", | |
78 | [ FILTER_OP_LE_DOUBLE ] = "LE_DOUBLE", | |
79 | ||
1e5f62b4 MD |
80 | /* Mixed S64-double binary comparators */ |
81 | [ FILTER_OP_EQ_DOUBLE_S64 ] = "EQ_DOUBLE_S64", | |
82 | [ FILTER_OP_NE_DOUBLE_S64 ] = "NE_DOUBLE_S64", | |
83 | [ FILTER_OP_GT_DOUBLE_S64 ] = "GT_DOUBLE_S64", | |
84 | [ FILTER_OP_LT_DOUBLE_S64 ] = "LT_DOUBLE_S64", | |
85 | [ FILTER_OP_GE_DOUBLE_S64 ] = "GE_DOUBLE_S64", | |
86 | [ FILTER_OP_LE_DOUBLE_S64 ] = "LE_DOUBLE_S64", | |
87 | ||
88 | [ FILTER_OP_EQ_S64_DOUBLE ] = "EQ_S64_DOUBLE", | |
89 | [ FILTER_OP_NE_S64_DOUBLE ] = "NE_S64_DOUBLE", | |
90 | [ FILTER_OP_GT_S64_DOUBLE ] = "GT_S64_DOUBLE", | |
91 | [ FILTER_OP_LT_S64_DOUBLE ] = "LT_S64_DOUBLE", | |
92 | [ FILTER_OP_GE_S64_DOUBLE ] = "GE_S64_DOUBLE", | |
93 | [ FILTER_OP_LE_S64_DOUBLE ] = "LE_S64_DOUBLE", | |
226106c0 | 94 | |
cd54f6d9 MD |
95 | /* unary */ |
96 | [ FILTER_OP_UNARY_PLUS ] = "UNARY_PLUS", | |
97 | [ FILTER_OP_UNARY_MINUS ] = "UNARY_MINUS", | |
98 | [ FILTER_OP_UNARY_NOT ] = "UNARY_NOT", | |
226106c0 MD |
99 | [ FILTER_OP_UNARY_PLUS_S64 ] = "UNARY_PLUS_S64", |
100 | [ FILTER_OP_UNARY_MINUS_S64 ] = "UNARY_MINUS_S64", | |
101 | [ FILTER_OP_UNARY_NOT_S64 ] = "UNARY_NOT_S64", | |
102 | [ FILTER_OP_UNARY_PLUS_DOUBLE ] = "UNARY_PLUS_DOUBLE", | |
103 | [ FILTER_OP_UNARY_MINUS_DOUBLE ] = "UNARY_MINUS_DOUBLE", | |
104 | [ FILTER_OP_UNARY_NOT_DOUBLE ] = "UNARY_NOT_DOUBLE", | |
cd54f6d9 MD |
105 | |
106 | /* logical */ | |
107 | [ FILTER_OP_AND ] = "AND", | |
108 | [ FILTER_OP_OR ] = "OR", | |
109 | ||
77aa5901 | 110 | /* load field ref */ |
cd54f6d9 | 111 | [ FILTER_OP_LOAD_FIELD_REF ] = "LOAD_FIELD_REF", |
2f0145d1 MD |
112 | [ FILTER_OP_LOAD_FIELD_REF_STRING ] = "LOAD_FIELD_REF_STRING", |
113 | [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = "LOAD_FIELD_REF_SEQUENCE", | |
114 | [ FILTER_OP_LOAD_FIELD_REF_S64 ] = "LOAD_FIELD_REF_S64", | |
115 | [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = "LOAD_FIELD_REF_DOUBLE", | |
116 | ||
77aa5901 | 117 | /* load from immediate operand */ |
cd54f6d9 MD |
118 | [ FILTER_OP_LOAD_STRING ] = "LOAD_STRING", |
119 | [ FILTER_OP_LOAD_S64 ] = "LOAD_S64", | |
da6eed25 | 120 | [ FILTER_OP_LOAD_DOUBLE ] = "LOAD_DOUBLE", |
49905038 MD |
121 | |
122 | /* cast */ | |
123 | [ FILTER_OP_CAST_TO_S64 ] = "CAST_TO_S64", | |
124 | [ FILTER_OP_CAST_DOUBLE_TO_S64 ] = "CAST_DOUBLE_TO_S64", | |
125 | [ FILTER_OP_CAST_NOP ] = "CAST_NOP", | |
77aa5901 MD |
126 | |
127 | /* get context ref */ | |
128 | [ FILTER_OP_GET_CONTEXT_REF ] = "GET_CONTEXT_REF", | |
129 | [ FILTER_OP_GET_CONTEXT_REF_STRING ] = "GET_CONTEXT_REF_STRING", | |
130 | [ FILTER_OP_GET_CONTEXT_REF_S64 ] = "GET_CONTEXT_REF_S64", | |
131 | [ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = "GET_CONTEXT_REF_DOUBLE", | |
cd54f6d9 MD |
132 | }; |
133 | ||
cd54f6d9 MD |
134 | const char *print_op(enum filter_op op) |
135 | { | |
136 | if (op >= NR_FILTER_OPS) | |
137 | return "UNKNOWN"; | |
138 | else | |
139 | return opnames[op]; | |
140 | } | |
141 | ||
cd54f6d9 | 142 | static |
7dd08bec | 143 | int apply_field_reloc(struct lttng_event *event, |
cd54f6d9 MD |
144 | struct bytecode_runtime *runtime, |
145 | uint32_t runtime_len, | |
146 | uint32_t reloc_offset, | |
147 | const char *field_name) | |
148 | { | |
149 | const struct lttng_event_desc *desc; | |
150 | const struct lttng_event_field *fields, *field = NULL; | |
151 | unsigned int nr_fields, i; | |
152 | struct field_ref *field_ref; | |
2f0145d1 | 153 | struct load_op *op; |
cd54f6d9 MD |
154 | uint32_t field_offset = 0; |
155 | ||
77aa5901 | 156 | dbg_printf("Apply field reloc: %u %s\n", reloc_offset, field_name); |
cd54f6d9 MD |
157 | |
158 | /* Lookup event by name */ | |
159 | desc = event->desc; | |
160 | if (!desc) | |
161 | return -EINVAL; | |
162 | fields = desc->fields; | |
163 | if (!fields) | |
164 | return -EINVAL; | |
165 | nr_fields = desc->nr_fields; | |
166 | for (i = 0; i < nr_fields; i++) { | |
167 | if (!strcmp(fields[i].name, field_name)) { | |
168 | field = &fields[i]; | |
169 | break; | |
170 | } | |
171 | /* compute field offset */ | |
172 | switch (fields[i].type.atype) { | |
173 | case atype_integer: | |
174 | case atype_enum: | |
175 | field_offset += sizeof(int64_t); | |
176 | break; | |
177 | case atype_array: | |
178 | case atype_sequence: | |
179 | field_offset += sizeof(unsigned long); | |
180 | field_offset += sizeof(void *); | |
181 | break; | |
182 | case atype_string: | |
183 | field_offset += sizeof(void *); | |
184 | break; | |
185 | case atype_float: | |
186 | field_offset += sizeof(double); | |
da6eed25 | 187 | break; |
cd54f6d9 MD |
188 | default: |
189 | return -EINVAL; | |
190 | } | |
191 | } | |
192 | if (!field) | |
193 | return -EINVAL; | |
194 | ||
195 | /* Check if field offset is too large for 16-bit offset */ | |
5b4839a8 | 196 | if (field_offset > FILTER_BYTECODE_MAX_LEN - 1) |
cd54f6d9 MD |
197 | return -EINVAL; |
198 | ||
199 | /* set type */ | |
2f0145d1 MD |
200 | op = (struct load_op *) &runtime->data[reloc_offset]; |
201 | field_ref = (struct field_ref *) op->data; | |
cd54f6d9 MD |
202 | switch (field->type.atype) { |
203 | case atype_integer: | |
204 | case atype_enum: | |
2f0145d1 | 205 | op->op = FILTER_OP_LOAD_FIELD_REF_S64; |
cd54f6d9 MD |
206 | break; |
207 | case atype_array: | |
208 | case atype_sequence: | |
2f0145d1 | 209 | op->op = FILTER_OP_LOAD_FIELD_REF_SEQUENCE; |
cd54f6d9 MD |
210 | break; |
211 | case atype_string: | |
2f0145d1 | 212 | op->op = FILTER_OP_LOAD_FIELD_REF_STRING; |
cd54f6d9 MD |
213 | break; |
214 | case atype_float: | |
2f0145d1 | 215 | op->op = FILTER_OP_LOAD_FIELD_REF_DOUBLE; |
da6eed25 | 216 | break; |
cd54f6d9 MD |
217 | default: |
218 | return -EINVAL; | |
219 | } | |
220 | /* set offset */ | |
221 | field_ref->offset = (uint16_t) field_offset; | |
2d78951a MD |
222 | return 0; |
223 | } | |
224 | ||
77aa5901 MD |
225 | static |
226 | int apply_context_reloc(struct lttng_event *event, | |
227 | struct bytecode_runtime *runtime, | |
228 | uint32_t runtime_len, | |
229 | uint32_t reloc_offset, | |
230 | const char *context_name) | |
231 | { | |
232 | struct field_ref *field_ref; | |
233 | struct load_op *op; | |
234 | struct lttng_ctx_field *ctx_field; | |
235 | int idx; | |
53569322 | 236 | struct lttng_session *session = runtime->p.session; |
77aa5901 MD |
237 | |
238 | dbg_printf("Apply context reloc: %u %s\n", reloc_offset, context_name); | |
239 | ||
240 | /* Get context index */ | |
53569322 MD |
241 | idx = lttng_get_context_index(session->ctx, context_name); |
242 | if (idx < 0) { | |
243 | if (lttng_context_is_app(context_name)) { | |
244 | int ret; | |
245 | ||
246 | ret = lttng_ust_add_app_context_to_ctx_rcu(context_name, | |
247 | &session->ctx); | |
248 | if (ret) | |
249 | return ret; | |
250 | idx = lttng_get_context_index(session->ctx, | |
251 | context_name); | |
252 | if (idx < 0) | |
253 | return -ENOENT; | |
254 | } else { | |
255 | return -ENOENT; | |
256 | } | |
257 | } | |
77aa5901 MD |
258 | /* Check if idx is too large for 16-bit offset */ |
259 | if (idx > FILTER_BYTECODE_MAX_LEN - 1) | |
260 | return -EINVAL; | |
261 | ||
262 | /* Get context return type */ | |
53569322 | 263 | ctx_field = &session->ctx->fields[idx]; |
77aa5901 MD |
264 | op = (struct load_op *) &runtime->data[reloc_offset]; |
265 | field_ref = (struct field_ref *) op->data; | |
266 | switch (ctx_field->event_field.type.atype) { | |
267 | case atype_integer: | |
268 | case atype_enum: | |
269 | op->op = FILTER_OP_GET_CONTEXT_REF_S64; | |
270 | break; | |
271 | /* Sequence and array supported as string */ | |
272 | case atype_string: | |
273 | case atype_array: | |
274 | case atype_sequence: | |
275 | op->op = FILTER_OP_GET_CONTEXT_REF_STRING; | |
276 | break; | |
277 | case atype_float: | |
278 | op->op = FILTER_OP_GET_CONTEXT_REF_DOUBLE; | |
279 | break; | |
53569322 MD |
280 | case atype_dynamic: |
281 | op->op = FILTER_OP_GET_CONTEXT_REF; | |
282 | break; | |
77aa5901 MD |
283 | default: |
284 | return -EINVAL; | |
285 | } | |
286 | /* set offset to context index within channel contexts */ | |
287 | field_ref->offset = (uint16_t) idx; | |
288 | return 0; | |
289 | } | |
290 | ||
291 | static | |
292 | int apply_reloc(struct lttng_event *event, | |
293 | struct bytecode_runtime *runtime, | |
294 | uint32_t runtime_len, | |
295 | uint32_t reloc_offset, | |
296 | const char *name) | |
297 | { | |
298 | struct load_op *op; | |
299 | ||
300 | dbg_printf("Apply reloc: %u %s\n", reloc_offset, name); | |
301 | ||
302 | /* Ensure that the reloc is within the code */ | |
303 | if (runtime_len - reloc_offset < sizeof(uint16_t)) | |
304 | return -EINVAL; | |
305 | ||
306 | op = (struct load_op *) &runtime->data[reloc_offset]; | |
307 | switch (op->op) { | |
308 | case FILTER_OP_LOAD_FIELD_REF: | |
309 | return apply_field_reloc(event, runtime, runtime_len, | |
310 | reloc_offset, name); | |
311 | case FILTER_OP_GET_CONTEXT_REF: | |
312 | return apply_context_reloc(event, runtime, runtime_len, | |
313 | reloc_offset, name); | |
314 | default: | |
315 | ERR("Unknown reloc op type %u\n", op->op); | |
316 | return -EINVAL; | |
317 | } | |
318 | return 0; | |
319 | } | |
320 | ||
f488575f MD |
321 | static |
322 | int bytecode_is_linked(struct lttng_ust_filter_bytecode_node *filter_bytecode, | |
7dd08bec | 323 | struct lttng_event *event) |
f488575f MD |
324 | { |
325 | struct lttng_bytecode_runtime *bc_runtime; | |
326 | ||
e58095ef MD |
327 | cds_list_for_each_entry(bc_runtime, |
328 | &event->bytecode_runtime_head, node) { | |
f488575f MD |
329 | if (bc_runtime->bc == filter_bytecode) |
330 | return 1; | |
331 | } | |
332 | return 0; | |
333 | } | |
334 | ||
cd54f6d9 MD |
335 | /* |
336 | * Take a bytecode with reloc table and link it to an event to create a | |
337 | * bytecode runtime. | |
338 | */ | |
2d78951a | 339 | static |
7dd08bec | 340 | int _lttng_filter_event_link_bytecode(struct lttng_event *event, |
e58095ef MD |
341 | struct lttng_ust_filter_bytecode_node *filter_bytecode, |
342 | struct cds_list_head *insert_loc) | |
2d78951a | 343 | { |
cd54f6d9 MD |
344 | int ret, offset, next_offset; |
345 | struct bytecode_runtime *runtime = NULL; | |
346 | size_t runtime_alloc_len; | |
347 | ||
2d78951a MD |
348 | if (!filter_bytecode) |
349 | return 0; | |
cd54f6d9 | 350 | /* Bytecode already linked */ |
f488575f | 351 | if (bytecode_is_linked(filter_bytecode, event)) |
cd54f6d9 | 352 | return 0; |
2d78951a | 353 | |
f488575f | 354 | dbg_printf("Linking...\n"); |
cd54f6d9 MD |
355 | |
356 | /* We don't need the reloc table in the runtime */ | |
f488575f | 357 | runtime_alloc_len = sizeof(*runtime) + filter_bytecode->bc.reloc_offset; |
cd54f6d9 MD |
358 | runtime = zmalloc(runtime_alloc_len); |
359 | if (!runtime) { | |
360 | ret = -ENOMEM; | |
e0a7d7ab | 361 | goto alloc_error; |
cd54f6d9 | 362 | } |
f488575f | 363 | runtime->p.bc = filter_bytecode; |
53569322 | 364 | runtime->p.session = event->chan->session; |
f488575f | 365 | runtime->len = filter_bytecode->bc.reloc_offset; |
cd54f6d9 | 366 | /* copy original bytecode */ |
f488575f | 367 | memcpy(runtime->data, filter_bytecode->bc.data, runtime->len); |
cd54f6d9 MD |
368 | /* |
369 | * apply relocs. Those are a uint16_t (offset in bytecode) | |
370 | * followed by a string (field name). | |
371 | */ | |
f488575f MD |
372 | for (offset = filter_bytecode->bc.reloc_offset; |
373 | offset < filter_bytecode->bc.len; | |
cd54f6d9 MD |
374 | offset = next_offset) { |
375 | uint16_t reloc_offset = | |
f488575f | 376 | *(uint16_t *) &filter_bytecode->bc.data[offset]; |
77aa5901 | 377 | const char *name = |
f488575f | 378 | (const char *) &filter_bytecode->bc.data[offset + sizeof(uint16_t)]; |
cd54f6d9 | 379 | |
77aa5901 | 380 | ret = apply_reloc(event, runtime, runtime->len, reloc_offset, name); |
cd54f6d9 MD |
381 | if (ret) { |
382 | goto link_error; | |
383 | } | |
77aa5901 | 384 | next_offset = offset + sizeof(uint16_t) + strlen(name) + 1; |
cd54f6d9 | 385 | } |
9522a886 MD |
386 | /* Validate bytecode */ |
387 | ret = lttng_filter_validate_bytecode(runtime); | |
388 | if (ret) { | |
389 | goto link_error; | |
390 | } | |
08c84b15 MD |
391 | /* Specialize bytecode */ |
392 | ret = lttng_filter_specialize_bytecode(runtime); | |
393 | if (ret) { | |
394 | goto link_error; | |
395 | } | |
f488575f | 396 | runtime->p.filter = lttng_filter_interpret_bytecode; |
21af05a9 | 397 | runtime->p.link_failed = 0; |
e58095ef | 398 | cds_list_add_rcu(&runtime->p.node, insert_loc); |
f488575f | 399 | dbg_printf("Linking successful.\n"); |
2d78951a | 400 | return 0; |
cd54f6d9 MD |
401 | |
402 | link_error: | |
f488575f | 403 | runtime->p.filter = lttng_filter_false; |
21af05a9 | 404 | runtime->p.link_failed = 1; |
e58095ef | 405 | cds_list_add_rcu(&runtime->p.node, insert_loc); |
e0a7d7ab | 406 | alloc_error: |
f488575f | 407 | dbg_printf("Linking failed.\n"); |
cd54f6d9 | 408 | return ret; |
2d78951a MD |
409 | } |
410 | ||
e58095ef | 411 | void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime) |
2d78951a | 412 | { |
e58095ef | 413 | struct lttng_ust_filter_bytecode_node *bc = runtime->bc; |
f488575f | 414 | |
21af05a9 | 415 | if (!bc->enabler->enabled || runtime->link_failed) |
e58095ef | 416 | runtime->filter = lttng_filter_false; |
21af05a9 MD |
417 | else |
418 | runtime->filter = lttng_filter_interpret_bytecode; | |
2d78951a MD |
419 | } |
420 | ||
421 | /* | |
e58095ef | 422 | * Link bytecode for all enablers referenced by an event. |
2d78951a | 423 | */ |
e58095ef MD |
424 | void lttng_enabler_event_link_bytecode(struct lttng_event *event, |
425 | struct lttng_enabler *enabler) | |
2d78951a | 426 | { |
e58095ef MD |
427 | struct lttng_ust_filter_bytecode_node *bc; |
428 | struct lttng_bytecode_runtime *runtime; | |
429 | ||
430 | /* Can only be called for events with desc attached */ | |
431 | assert(event->desc); | |
432 | ||
433 | /* Link each bytecode. */ | |
434 | cds_list_for_each_entry(bc, &enabler->filter_bytecode_head, node) { | |
435 | int found = 0, ret; | |
436 | struct cds_list_head *insert_loc; | |
437 | ||
438 | cds_list_for_each_entry(runtime, | |
439 | &event->bytecode_runtime_head, node) { | |
440 | if (runtime->bc == bc) { | |
441 | found = 1; | |
442 | break; | |
443 | } | |
444 | } | |
445 | /* Skip bytecode already linked */ | |
446 | if (found) | |
447 | continue; | |
448 | ||
449 | /* | |
450 | * Insert at specified priority (seqnum) in increasing | |
451 | * order. | |
452 | */ | |
453 | cds_list_for_each_entry_reverse(runtime, | |
454 | &event->bytecode_runtime_head, node) { | |
455 | if (runtime->bc->bc.seqnum < bc->bc.seqnum) { | |
456 | /* insert here */ | |
457 | insert_loc = &runtime->node; | |
458 | goto add_within; | |
459 | } | |
460 | } | |
461 | /* Add to head to list */ | |
462 | insert_loc = &event->bytecode_runtime_head; | |
463 | add_within: | |
f488575f | 464 | dbg_printf("linking bytecode\n"); |
e58095ef MD |
465 | ret = _lttng_filter_event_link_bytecode(event, bc, |
466 | insert_loc); | |
467 | if (ret) { | |
468 | dbg_printf("[lttng filter] warning: cannot link event bytecode\n"); | |
469 | } | |
2d78951a | 470 | } |
2d78951a MD |
471 | } |
472 | ||
473 | /* | |
e58095ef | 474 | * We own the filter_bytecode if we return success. |
2d78951a | 475 | */ |
e58095ef | 476 | int lttng_filter_enabler_attach_bytecode(struct lttng_enabler *enabler, |
f488575f | 477 | struct lttng_ust_filter_bytecode_node *filter_bytecode) |
2d78951a | 478 | { |
e58095ef | 479 | cds_list_add(&filter_bytecode->node, &enabler->filter_bytecode_head); |
2d78951a MD |
480 | return 0; |
481 | } | |
f488575f | 482 | |
e58095ef | 483 | void lttng_free_enabler_filter_bytecode(struct lttng_enabler *enabler) |
f488575f MD |
484 | { |
485 | struct lttng_ust_filter_bytecode_node *filter_bytecode, *tmp; | |
486 | ||
487 | cds_list_for_each_entry_safe(filter_bytecode, tmp, | |
e58095ef | 488 | &enabler->filter_bytecode_head, node) { |
f488575f MD |
489 | free(filter_bytecode); |
490 | } | |
491 | } | |
492 | ||
7dd08bec | 493 | void lttng_free_event_filter_runtime(struct lttng_event *event) |
f488575f MD |
494 | { |
495 | struct bytecode_runtime *runtime, *tmp; | |
496 | ||
497 | cds_list_for_each_entry_safe(runtime, tmp, | |
e58095ef | 498 | &event->bytecode_runtime_head, p.node) { |
f488575f MD |
499 | free(runtime); |
500 | } | |
501 | } |