Commit | Line | Data |
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2d78951a | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: MIT |
2d78951a | 3 | * |
7e50015d | 4 | * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
2d78951a | 5 | * |
c0c0989a | 6 | * LTTng UST bytecode code. |
2d78951a MD |
7 | */ |
8 | ||
3fbec7dc | 9 | #define _LGPL_SOURCE |
b4051ad8 | 10 | #include <stddef.h> |
fb31eb73 FD |
11 | #include <stdint.h> |
12 | ||
f488575f | 13 | #include <urcu/rculist.h> |
fb31eb73 | 14 | |
04aa13f8 | 15 | #include "lttng-bytecode.h" |
d871c65b | 16 | #include "ust-events-internal.h" |
cd54f6d9 MD |
17 | |
18 | static const char *opnames[] = { | |
04aa13f8 | 19 | [ BYTECODE_OP_UNKNOWN ] = "UNKNOWN", |
cd54f6d9 | 20 | |
04aa13f8 | 21 | [ BYTECODE_OP_RETURN ] = "RETURN", |
cd54f6d9 MD |
22 | |
23 | /* binary */ | |
04aa13f8 FD |
24 | [ BYTECODE_OP_MUL ] = "MUL", |
25 | [ BYTECODE_OP_DIV ] = "DIV", | |
26 | [ BYTECODE_OP_MOD ] = "MOD", | |
27 | [ BYTECODE_OP_PLUS ] = "PLUS", | |
28 | [ BYTECODE_OP_MINUS ] = "MINUS", | |
29 | [ BYTECODE_OP_BIT_RSHIFT ] = "BIT_RSHIFT", | |
30 | [ BYTECODE_OP_BIT_LSHIFT ] = "BIT_LSHIFT", | |
31 | [ BYTECODE_OP_BIT_AND ] = "BIT_AND", | |
32 | [ BYTECODE_OP_BIT_OR ] = "BIT_OR", | |
33 | [ BYTECODE_OP_BIT_XOR ] = "BIT_XOR", | |
226106c0 MD |
34 | |
35 | /* binary comparators */ | |
04aa13f8 FD |
36 | [ BYTECODE_OP_EQ ] = "EQ", |
37 | [ BYTECODE_OP_NE ] = "NE", | |
38 | [ BYTECODE_OP_GT ] = "GT", | |
39 | [ BYTECODE_OP_LT ] = "LT", | |
40 | [ BYTECODE_OP_GE ] = "GE", | |
41 | [ BYTECODE_OP_LE ] = "LE", | |
cd54f6d9 | 42 | |
226106c0 | 43 | /* string binary comparators */ |
04aa13f8 FD |
44 | [ BYTECODE_OP_EQ_STRING ] = "EQ_STRING", |
45 | [ BYTECODE_OP_NE_STRING ] = "NE_STRING", | |
46 | [ BYTECODE_OP_GT_STRING ] = "GT_STRING", | |
47 | [ BYTECODE_OP_LT_STRING ] = "LT_STRING", | |
48 | [ BYTECODE_OP_GE_STRING ] = "GE_STRING", | |
49 | [ BYTECODE_OP_LE_STRING ] = "LE_STRING", | |
226106c0 MD |
50 | |
51 | /* s64 binary comparators */ | |
04aa13f8 FD |
52 | [ BYTECODE_OP_EQ_S64 ] = "EQ_S64", |
53 | [ BYTECODE_OP_NE_S64 ] = "NE_S64", | |
54 | [ BYTECODE_OP_GT_S64 ] = "GT_S64", | |
55 | [ BYTECODE_OP_LT_S64 ] = "LT_S64", | |
56 | [ BYTECODE_OP_GE_S64 ] = "GE_S64", | |
57 | [ BYTECODE_OP_LE_S64 ] = "LE_S64", | |
226106c0 MD |
58 | |
59 | /* double binary comparators */ | |
04aa13f8 FD |
60 | [ BYTECODE_OP_EQ_DOUBLE ] = "EQ_DOUBLE", |
61 | [ BYTECODE_OP_NE_DOUBLE ] = "NE_DOUBLE", | |
62 | [ BYTECODE_OP_GT_DOUBLE ] = "GT_DOUBLE", | |
63 | [ BYTECODE_OP_LT_DOUBLE ] = "LT_DOUBLE", | |
64 | [ BYTECODE_OP_GE_DOUBLE ] = "GE_DOUBLE", | |
65 | [ BYTECODE_OP_LE_DOUBLE ] = "LE_DOUBLE", | |
226106c0 | 66 | |
1e5f62b4 | 67 | /* Mixed S64-double binary comparators */ |
04aa13f8 FD |
68 | [ BYTECODE_OP_EQ_DOUBLE_S64 ] = "EQ_DOUBLE_S64", |
69 | [ BYTECODE_OP_NE_DOUBLE_S64 ] = "NE_DOUBLE_S64", | |
70 | [ BYTECODE_OP_GT_DOUBLE_S64 ] = "GT_DOUBLE_S64", | |
71 | [ BYTECODE_OP_LT_DOUBLE_S64 ] = "LT_DOUBLE_S64", | |
72 | [ BYTECODE_OP_GE_DOUBLE_S64 ] = "GE_DOUBLE_S64", | |
73 | [ BYTECODE_OP_LE_DOUBLE_S64 ] = "LE_DOUBLE_S64", | |
74 | ||
75 | [ BYTECODE_OP_EQ_S64_DOUBLE ] = "EQ_S64_DOUBLE", | |
76 | [ BYTECODE_OP_NE_S64_DOUBLE ] = "NE_S64_DOUBLE", | |
77 | [ BYTECODE_OP_GT_S64_DOUBLE ] = "GT_S64_DOUBLE", | |
78 | [ BYTECODE_OP_LT_S64_DOUBLE ] = "LT_S64_DOUBLE", | |
79 | [ BYTECODE_OP_GE_S64_DOUBLE ] = "GE_S64_DOUBLE", | |
80 | [ BYTECODE_OP_LE_S64_DOUBLE ] = "LE_S64_DOUBLE", | |
226106c0 | 81 | |
cd54f6d9 | 82 | /* unary */ |
04aa13f8 FD |
83 | [ BYTECODE_OP_UNARY_PLUS ] = "UNARY_PLUS", |
84 | [ BYTECODE_OP_UNARY_MINUS ] = "UNARY_MINUS", | |
85 | [ BYTECODE_OP_UNARY_NOT ] = "UNARY_NOT", | |
86 | [ BYTECODE_OP_UNARY_PLUS_S64 ] = "UNARY_PLUS_S64", | |
87 | [ BYTECODE_OP_UNARY_MINUS_S64 ] = "UNARY_MINUS_S64", | |
88 | [ BYTECODE_OP_UNARY_NOT_S64 ] = "UNARY_NOT_S64", | |
89 | [ BYTECODE_OP_UNARY_PLUS_DOUBLE ] = "UNARY_PLUS_DOUBLE", | |
90 | [ BYTECODE_OP_UNARY_MINUS_DOUBLE ] = "UNARY_MINUS_DOUBLE", | |
91 | [ BYTECODE_OP_UNARY_NOT_DOUBLE ] = "UNARY_NOT_DOUBLE", | |
cd54f6d9 MD |
92 | |
93 | /* logical */ | |
04aa13f8 FD |
94 | [ BYTECODE_OP_AND ] = "AND", |
95 | [ BYTECODE_OP_OR ] = "OR", | |
cd54f6d9 | 96 | |
77aa5901 | 97 | /* load field ref */ |
04aa13f8 FD |
98 | [ BYTECODE_OP_LOAD_FIELD_REF ] = "LOAD_FIELD_REF", |
99 | [ BYTECODE_OP_LOAD_FIELD_REF_STRING ] = "LOAD_FIELD_REF_STRING", | |
100 | [ BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE ] = "LOAD_FIELD_REF_SEQUENCE", | |
101 | [ BYTECODE_OP_LOAD_FIELD_REF_S64 ] = "LOAD_FIELD_REF_S64", | |
102 | [ BYTECODE_OP_LOAD_FIELD_REF_DOUBLE ] = "LOAD_FIELD_REF_DOUBLE", | |
2f0145d1 | 103 | |
77aa5901 | 104 | /* load from immediate operand */ |
04aa13f8 FD |
105 | [ BYTECODE_OP_LOAD_STRING ] = "LOAD_STRING", |
106 | [ BYTECODE_OP_LOAD_S64 ] = "LOAD_S64", | |
107 | [ BYTECODE_OP_LOAD_DOUBLE ] = "LOAD_DOUBLE", | |
49905038 MD |
108 | |
109 | /* cast */ | |
04aa13f8 FD |
110 | [ BYTECODE_OP_CAST_TO_S64 ] = "CAST_TO_S64", |
111 | [ BYTECODE_OP_CAST_DOUBLE_TO_S64 ] = "CAST_DOUBLE_TO_S64", | |
112 | [ BYTECODE_OP_CAST_NOP ] = "CAST_NOP", | |
77aa5901 MD |
113 | |
114 | /* get context ref */ | |
04aa13f8 FD |
115 | [ BYTECODE_OP_GET_CONTEXT_REF ] = "GET_CONTEXT_REF", |
116 | [ BYTECODE_OP_GET_CONTEXT_REF_STRING ] = "GET_CONTEXT_REF_STRING", | |
117 | [ BYTECODE_OP_GET_CONTEXT_REF_S64 ] = "GET_CONTEXT_REF_S64", | |
118 | [ BYTECODE_OP_GET_CONTEXT_REF_DOUBLE ] = "GET_CONTEXT_REF_DOUBLE", | |
f6753f2d MD |
119 | |
120 | /* load userspace field ref */ | |
04aa13f8 FD |
121 | [ BYTECODE_OP_LOAD_FIELD_REF_USER_STRING ] = "LOAD_FIELD_REF_USER_STRING", |
122 | [ BYTECODE_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = "LOAD_FIELD_REF_USER_SEQUENCE", | |
f6753f2d MD |
123 | |
124 | /* | |
125 | * load immediate star globbing pattern (literal string) | |
126 | * from immediate. | |
127 | */ | |
04aa13f8 | 128 | [ BYTECODE_OP_LOAD_STAR_GLOB_STRING ] = "LOAD_STAR_GLOB_STRING", |
f6753f2d MD |
129 | |
130 | /* globbing pattern binary operator: apply to */ | |
04aa13f8 FD |
131 | [ BYTECODE_OP_EQ_STAR_GLOB_STRING ] = "EQ_STAR_GLOB_STRING", |
132 | [ BYTECODE_OP_NE_STAR_GLOB_STRING ] = "NE_STAR_GLOB_STRING", | |
47e5f13e MD |
133 | |
134 | /* | |
135 | * Instructions for recursive traversal through composed types. | |
136 | */ | |
04aa13f8 FD |
137 | [ BYTECODE_OP_GET_CONTEXT_ROOT ] = "GET_CONTEXT_ROOT", |
138 | [ BYTECODE_OP_GET_APP_CONTEXT_ROOT ] = "GET_APP_CONTEXT_ROOT", | |
139 | [ BYTECODE_OP_GET_PAYLOAD_ROOT ] = "GET_PAYLOAD_ROOT", | |
140 | ||
141 | [ BYTECODE_OP_GET_SYMBOL ] = "GET_SYMBOL", | |
142 | [ BYTECODE_OP_GET_SYMBOL_FIELD ] = "GET_SYMBOL_FIELD", | |
143 | [ BYTECODE_OP_GET_INDEX_U16 ] = "GET_INDEX_U16", | |
144 | [ BYTECODE_OP_GET_INDEX_U64 ] = "GET_INDEX_U64", | |
145 | ||
146 | [ BYTECODE_OP_LOAD_FIELD ] = "LOAD_FIELD", | |
147 | [ BYTECODE_OP_LOAD_FIELD_S8 ] = "LOAD_FIELD_S8", | |
148 | [ BYTECODE_OP_LOAD_FIELD_S16 ] = "LOAD_FIELD_S16", | |
149 | [ BYTECODE_OP_LOAD_FIELD_S32 ] = "LOAD_FIELD_S32", | |
150 | [ BYTECODE_OP_LOAD_FIELD_S64 ] = "LOAD_FIELD_S64", | |
151 | [ BYTECODE_OP_LOAD_FIELD_U8 ] = "LOAD_FIELD_U8", | |
152 | [ BYTECODE_OP_LOAD_FIELD_U16 ] = "LOAD_FIELD_U16", | |
153 | [ BYTECODE_OP_LOAD_FIELD_U32 ] = "LOAD_FIELD_U32", | |
154 | [ BYTECODE_OP_LOAD_FIELD_U64 ] = "LOAD_FIELD_U64", | |
155 | [ BYTECODE_OP_LOAD_FIELD_STRING ] = "LOAD_FIELD_STRING", | |
156 | [ BYTECODE_OP_LOAD_FIELD_SEQUENCE ] = "LOAD_FIELD_SEQUENCE", | |
157 | [ BYTECODE_OP_LOAD_FIELD_DOUBLE ] = "LOAD_FIELD_DOUBLE", | |
158 | ||
159 | [ BYTECODE_OP_UNARY_BIT_NOT ] = "UNARY_BIT_NOT", | |
160 | ||
161 | [ BYTECODE_OP_RETURN_S64 ] = "RETURN_S64", | |
cd54f6d9 MD |
162 | }; |
163 | ||
04aa13f8 | 164 | const char *print_op(enum bytecode_op op) |
cd54f6d9 | 165 | { |
04aa13f8 | 166 | if (op >= NR_BYTECODE_OPS) |
cd54f6d9 MD |
167 | return "UNKNOWN"; |
168 | else | |
169 | return opnames[op]; | |
170 | } | |
171 | ||
cd54f6d9 | 172 | static |
53b9d7db | 173 | int apply_field_reloc(const struct lttng_event_desc *event_desc, |
cd54f6d9 MD |
174 | struct bytecode_runtime *runtime, |
175 | uint32_t runtime_len, | |
176 | uint32_t reloc_offset, | |
47e5f13e | 177 | const char *field_name, |
04aa13f8 | 178 | enum bytecode_op bytecode_op) |
cd54f6d9 | 179 | { |
cd54f6d9 MD |
180 | const struct lttng_event_field *fields, *field = NULL; |
181 | unsigned int nr_fields, i; | |
2f0145d1 | 182 | struct load_op *op; |
cd54f6d9 MD |
183 | uint32_t field_offset = 0; |
184 | ||
77aa5901 | 185 | dbg_printf("Apply field reloc: %u %s\n", reloc_offset, field_name); |
cd54f6d9 MD |
186 | |
187 | /* Lookup event by name */ | |
53b9d7db | 188 | if (!event_desc) |
cd54f6d9 | 189 | return -EINVAL; |
53b9d7db | 190 | fields = event_desc->fields; |
cd54f6d9 MD |
191 | if (!fields) |
192 | return -EINVAL; | |
53b9d7db | 193 | nr_fields = event_desc->nr_fields; |
cd54f6d9 | 194 | for (i = 0; i < nr_fields; i++) { |
218deb69 MD |
195 | if (fields[i].u.ext.nofilter) { |
196 | continue; | |
197 | } | |
cd54f6d9 MD |
198 | if (!strcmp(fields[i].name, field_name)) { |
199 | field = &fields[i]; | |
200 | break; | |
201 | } | |
202 | /* compute field offset */ | |
203 | switch (fields[i].type.atype) { | |
204 | case atype_integer: | |
205 | case atype_enum: | |
218deb69 | 206 | case atype_enum_nestable: |
cd54f6d9 MD |
207 | field_offset += sizeof(int64_t); |
208 | break; | |
209 | case atype_array: | |
218deb69 | 210 | case atype_array_nestable: |
cd54f6d9 | 211 | case atype_sequence: |
218deb69 | 212 | case atype_sequence_nestable: |
cd54f6d9 MD |
213 | field_offset += sizeof(unsigned long); |
214 | field_offset += sizeof(void *); | |
215 | break; | |
216 | case atype_string: | |
217 | field_offset += sizeof(void *); | |
218 | break; | |
219 | case atype_float: | |
220 | field_offset += sizeof(double); | |
da6eed25 | 221 | break; |
cd54f6d9 MD |
222 | default: |
223 | return -EINVAL; | |
224 | } | |
225 | } | |
226 | if (!field) | |
227 | return -EINVAL; | |
228 | ||
229 | /* Check if field offset is too large for 16-bit offset */ | |
5b4839a8 | 230 | if (field_offset > FILTER_BYTECODE_MAX_LEN - 1) |
cd54f6d9 MD |
231 | return -EINVAL; |
232 | ||
233 | /* set type */ | |
47e5f13e MD |
234 | op = (struct load_op *) &runtime->code[reloc_offset]; |
235 | ||
04aa13f8 FD |
236 | switch (bytecode_op) { |
237 | case BYTECODE_OP_LOAD_FIELD_REF: | |
47e5f13e MD |
238 | { |
239 | struct field_ref *field_ref; | |
240 | ||
241 | field_ref = (struct field_ref *) op->data; | |
242 | switch (field->type.atype) { | |
243 | case atype_integer: | |
244 | case atype_enum: | |
218deb69 | 245 | case atype_enum_nestable: |
04aa13f8 | 246 | op->op = BYTECODE_OP_LOAD_FIELD_REF_S64; |
47e5f13e MD |
247 | break; |
248 | case atype_array: | |
218deb69 | 249 | case atype_array_nestable: |
47e5f13e | 250 | case atype_sequence: |
218deb69 | 251 | case atype_sequence_nestable: |
04aa13f8 | 252 | op->op = BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE; |
47e5f13e MD |
253 | break; |
254 | case atype_string: | |
04aa13f8 | 255 | op->op = BYTECODE_OP_LOAD_FIELD_REF_STRING; |
47e5f13e MD |
256 | break; |
257 | case atype_float: | |
04aa13f8 | 258 | op->op = BYTECODE_OP_LOAD_FIELD_REF_DOUBLE; |
47e5f13e MD |
259 | break; |
260 | default: | |
261 | return -EINVAL; | |
262 | } | |
263 | /* set offset */ | |
264 | field_ref->offset = (uint16_t) field_offset; | |
da6eed25 | 265 | break; |
47e5f13e | 266 | } |
cd54f6d9 MD |
267 | default: |
268 | return -EINVAL; | |
269 | } | |
2d78951a MD |
270 | return 0; |
271 | } | |
272 | ||
77aa5901 | 273 | static |
53b9d7db | 274 | int apply_context_reloc(struct bytecode_runtime *runtime, |
77aa5901 MD |
275 | uint32_t runtime_len, |
276 | uint32_t reloc_offset, | |
47e5f13e | 277 | const char *context_name, |
04aa13f8 | 278 | enum bytecode_op bytecode_op) |
77aa5901 | 279 | { |
77aa5901 MD |
280 | struct load_op *op; |
281 | struct lttng_ctx_field *ctx_field; | |
282 | int idx; | |
185c7828 | 283 | struct lttng_ctx **pctx = runtime->p.pctx; |
77aa5901 MD |
284 | |
285 | dbg_printf("Apply context reloc: %u %s\n", reloc_offset, context_name); | |
286 | ||
287 | /* Get context index */ | |
185c7828 | 288 | idx = lttng_get_context_index(*pctx, context_name); |
53569322 MD |
289 | if (idx < 0) { |
290 | if (lttng_context_is_app(context_name)) { | |
291 | int ret; | |
292 | ||
293 | ret = lttng_ust_add_app_context_to_ctx_rcu(context_name, | |
185c7828 | 294 | pctx); |
53569322 MD |
295 | if (ret) |
296 | return ret; | |
185c7828 | 297 | idx = lttng_get_context_index(*pctx, context_name); |
53569322 MD |
298 | if (idx < 0) |
299 | return -ENOENT; | |
300 | } else { | |
301 | return -ENOENT; | |
302 | } | |
303 | } | |
77aa5901 MD |
304 | /* Check if idx is too large for 16-bit offset */ |
305 | if (idx > FILTER_BYTECODE_MAX_LEN - 1) | |
306 | return -EINVAL; | |
307 | ||
308 | /* Get context return type */ | |
185c7828 | 309 | ctx_field = &(*pctx)->fields[idx]; |
47e5f13e MD |
310 | op = (struct load_op *) &runtime->code[reloc_offset]; |
311 | ||
04aa13f8 FD |
312 | switch (bytecode_op) { |
313 | case BYTECODE_OP_GET_CONTEXT_REF: | |
47e5f13e MD |
314 | { |
315 | struct field_ref *field_ref; | |
316 | ||
317 | field_ref = (struct field_ref *) op->data; | |
318 | switch (ctx_field->event_field.type.atype) { | |
319 | case atype_integer: | |
320 | case atype_enum: | |
218deb69 | 321 | case atype_enum_nestable: |
04aa13f8 | 322 | op->op = BYTECODE_OP_GET_CONTEXT_REF_S64; |
47e5f13e MD |
323 | break; |
324 | /* Sequence and array supported as string */ | |
325 | case atype_string: | |
326 | case atype_array: | |
218deb69 | 327 | case atype_array_nestable: |
47e5f13e | 328 | case atype_sequence: |
218deb69 | 329 | case atype_sequence_nestable: |
04aa13f8 | 330 | op->op = BYTECODE_OP_GET_CONTEXT_REF_STRING; |
47e5f13e MD |
331 | break; |
332 | case atype_float: | |
04aa13f8 | 333 | op->op = BYTECODE_OP_GET_CONTEXT_REF_DOUBLE; |
47e5f13e MD |
334 | break; |
335 | case atype_dynamic: | |
04aa13f8 | 336 | op->op = BYTECODE_OP_GET_CONTEXT_REF; |
47e5f13e MD |
337 | break; |
338 | default: | |
339 | return -EINVAL; | |
340 | } | |
341 | /* set offset to context index within channel contexts */ | |
342 | field_ref->offset = (uint16_t) idx; | |
53569322 | 343 | break; |
47e5f13e | 344 | } |
77aa5901 MD |
345 | default: |
346 | return -EINVAL; | |
347 | } | |
77aa5901 MD |
348 | return 0; |
349 | } | |
350 | ||
351 | static | |
53b9d7db | 352 | int apply_reloc(const struct lttng_event_desc *event_desc, |
77aa5901 MD |
353 | struct bytecode_runtime *runtime, |
354 | uint32_t runtime_len, | |
355 | uint32_t reloc_offset, | |
356 | const char *name) | |
357 | { | |
358 | struct load_op *op; | |
359 | ||
360 | dbg_printf("Apply reloc: %u %s\n", reloc_offset, name); | |
361 | ||
362 | /* Ensure that the reloc is within the code */ | |
363 | if (runtime_len - reloc_offset < sizeof(uint16_t)) | |
364 | return -EINVAL; | |
365 | ||
47e5f13e | 366 | op = (struct load_op *) &runtime->code[reloc_offset]; |
77aa5901 | 367 | switch (op->op) { |
04aa13f8 | 368 | case BYTECODE_OP_LOAD_FIELD_REF: |
53b9d7db | 369 | return apply_field_reloc(event_desc, runtime, runtime_len, |
47e5f13e | 370 | reloc_offset, name, op->op); |
04aa13f8 | 371 | case BYTECODE_OP_GET_CONTEXT_REF: |
53b9d7db | 372 | return apply_context_reloc(runtime, runtime_len, |
47e5f13e | 373 | reloc_offset, name, op->op); |
04aa13f8 FD |
374 | case BYTECODE_OP_GET_SYMBOL: |
375 | case BYTECODE_OP_GET_SYMBOL_FIELD: | |
47e5f13e MD |
376 | /* |
377 | * Will be handled by load specialize phase or | |
378 | * dynamically by interpreter. | |
379 | */ | |
380 | return 0; | |
77aa5901 MD |
381 | default: |
382 | ERR("Unknown reloc op type %u\n", op->op); | |
383 | return -EINVAL; | |
384 | } | |
385 | return 0; | |
386 | } | |
387 | ||
f488575f | 388 | static |
ab249ecf | 389 | int bytecode_is_linked(struct lttng_ust_bytecode_node *bytecode, |
53b9d7db | 390 | struct cds_list_head *bytecode_runtime_head) |
f488575f MD |
391 | { |
392 | struct lttng_bytecode_runtime *bc_runtime; | |
393 | ||
53b9d7db | 394 | cds_list_for_each_entry(bc_runtime, bytecode_runtime_head, node) { |
ab249ecf | 395 | if (bc_runtime->bc == bytecode) |
f488575f MD |
396 | return 1; |
397 | } | |
398 | return 0; | |
399 | } | |
400 | ||
cd54f6d9 MD |
401 | /* |
402 | * Take a bytecode with reloc table and link it to an event to create a | |
403 | * bytecode runtime. | |
404 | */ | |
2d78951a | 405 | static |
83a109e6 | 406 | int link_bytecode(const struct lttng_event_desc *event_desc, |
53b9d7db | 407 | struct lttng_ctx **ctx, |
ab249ecf | 408 | struct lttng_ust_bytecode_node *bytecode, |
e58095ef | 409 | struct cds_list_head *insert_loc) |
2d78951a | 410 | { |
cd54f6d9 MD |
411 | int ret, offset, next_offset; |
412 | struct bytecode_runtime *runtime = NULL; | |
413 | size_t runtime_alloc_len; | |
414 | ||
ab249ecf | 415 | if (!bytecode) |
2d78951a | 416 | return 0; |
cd54f6d9 | 417 | /* Bytecode already linked */ |
ab249ecf | 418 | if (bytecode_is_linked(bytecode, insert_loc)) |
cd54f6d9 | 419 | return 0; |
2d78951a | 420 | |
f488575f | 421 | dbg_printf("Linking...\n"); |
cd54f6d9 MD |
422 | |
423 | /* We don't need the reloc table in the runtime */ | |
ab249ecf | 424 | runtime_alloc_len = sizeof(*runtime) + bytecode->bc.reloc_offset; |
cd54f6d9 MD |
425 | runtime = zmalloc(runtime_alloc_len); |
426 | if (!runtime) { | |
427 | ret = -ENOMEM; | |
e0a7d7ab | 428 | goto alloc_error; |
cd54f6d9 | 429 | } |
ab249ecf | 430 | runtime->p.bc = bytecode; |
53b9d7db | 431 | runtime->p.pctx = ctx; |
ab249ecf | 432 | runtime->len = bytecode->bc.reloc_offset; |
cd54f6d9 | 433 | /* copy original bytecode */ |
ab249ecf | 434 | memcpy(runtime->code, bytecode->bc.data, runtime->len); |
cd54f6d9 MD |
435 | /* |
436 | * apply relocs. Those are a uint16_t (offset in bytecode) | |
437 | * followed by a string (field name). | |
438 | */ | |
ab249ecf FD |
439 | for (offset = bytecode->bc.reloc_offset; |
440 | offset < bytecode->bc.len; | |
cd54f6d9 MD |
441 | offset = next_offset) { |
442 | uint16_t reloc_offset = | |
ab249ecf | 443 | *(uint16_t *) &bytecode->bc.data[offset]; |
77aa5901 | 444 | const char *name = |
ab249ecf | 445 | (const char *) &bytecode->bc.data[offset + sizeof(uint16_t)]; |
cd54f6d9 | 446 | |
53b9d7db | 447 | ret = apply_reloc(event_desc, runtime, runtime->len, reloc_offset, name); |
cd54f6d9 MD |
448 | if (ret) { |
449 | goto link_error; | |
450 | } | |
77aa5901 | 451 | next_offset = offset + sizeof(uint16_t) + strlen(name) + 1; |
cd54f6d9 | 452 | } |
9522a886 | 453 | /* Validate bytecode */ |
04aa13f8 | 454 | ret = lttng_bytecode_validate(runtime); |
9522a886 MD |
455 | if (ret) { |
456 | goto link_error; | |
457 | } | |
08c84b15 | 458 | /* Specialize bytecode */ |
04aa13f8 | 459 | ret = lttng_bytecode_specialize(event_desc, runtime); |
08c84b15 MD |
460 | if (ret) { |
461 | goto link_error; | |
462 | } | |
c42416df FD |
463 | |
464 | switch (bytecode->type) { | |
465 | case LTTNG_UST_BYTECODE_NODE_TYPE_FILTER: | |
466 | runtime->p.interpreter_funcs.filter = lttng_bytecode_filter_interpret; | |
467 | break; | |
d37ecb3f FD |
468 | case LTTNG_UST_BYTECODE_NODE_TYPE_CAPTURE: |
469 | runtime->p.interpreter_funcs.capture = lttng_bytecode_capture_interpret; | |
470 | break; | |
c42416df FD |
471 | default: |
472 | abort(); | |
473 | } | |
474 | ||
21af05a9 | 475 | runtime->p.link_failed = 0; |
e58095ef | 476 | cds_list_add_rcu(&runtime->p.node, insert_loc); |
f488575f | 477 | dbg_printf("Linking successful.\n"); |
2d78951a | 478 | return 0; |
cd54f6d9 MD |
479 | |
480 | link_error: | |
c42416df FD |
481 | switch (bytecode->type) { |
482 | case LTTNG_UST_BYTECODE_NODE_TYPE_FILTER: | |
483 | runtime->p.interpreter_funcs.filter = lttng_bytecode_filter_interpret_false; | |
484 | break; | |
d37ecb3f FD |
485 | case LTTNG_UST_BYTECODE_NODE_TYPE_CAPTURE: |
486 | runtime->p.interpreter_funcs.capture = lttng_bytecode_capture_interpret_false; | |
487 | break; | |
c42416df FD |
488 | default: |
489 | abort(); | |
490 | } | |
491 | ||
21af05a9 | 492 | runtime->p.link_failed = 1; |
e58095ef | 493 | cds_list_add_rcu(&runtime->p.node, insert_loc); |
e0a7d7ab | 494 | alloc_error: |
f488575f | 495 | dbg_printf("Linking failed.\n"); |
cd54f6d9 | 496 | return ret; |
2d78951a MD |
497 | } |
498 | ||
4d451c15 | 499 | void lttng_bytecode_filter_sync_state(struct lttng_bytecode_runtime *runtime) |
2d78951a | 500 | { |
ab249ecf | 501 | struct lttng_ust_bytecode_node *bc = runtime->bc; |
f488575f | 502 | |
21af05a9 | 503 | if (!bc->enabler->enabled || runtime->link_failed) |
c42416df | 504 | runtime->interpreter_funcs.filter = lttng_bytecode_filter_interpret_false; |
21af05a9 | 505 | else |
c42416df | 506 | runtime->interpreter_funcs.filter = lttng_bytecode_filter_interpret; |
2d78951a MD |
507 | } |
508 | ||
d37ecb3f FD |
509 | void lttng_bytecode_capture_sync_state(struct lttng_bytecode_runtime *runtime) |
510 | { | |
511 | struct lttng_ust_bytecode_node *bc = runtime->bc; | |
512 | ||
513 | if (!bc->enabler->enabled || runtime->link_failed) | |
514 | runtime->interpreter_funcs.capture = lttng_bytecode_capture_interpret_false; | |
515 | else | |
516 | runtime->interpreter_funcs.capture = lttng_bytecode_capture_interpret; | |
517 | } | |
518 | ||
2d78951a | 519 | /* |
621c07fc FD |
520 | * Given the lists of bytecode programs of an instance (trigger or event) and |
521 | * of a matching enabler, try to link all the enabler's bytecode programs with | |
522 | * the instance. | |
523 | * | |
524 | * This function is called after we confirmed that name enabler and the | |
525 | * instance are name matching (or glob pattern matching). | |
2d78951a | 526 | */ |
53b9d7db FD |
527 | void lttng_enabler_link_bytecode(const struct lttng_event_desc *event_desc, |
528 | struct lttng_ctx **ctx, | |
621c07fc FD |
529 | struct cds_list_head *instance_bytecode_head, |
530 | struct cds_list_head *enabler_bytecode_head) | |
2d78951a | 531 | { |
621c07fc | 532 | struct lttng_ust_bytecode_node *enabler_bc; |
e58095ef MD |
533 | struct lttng_bytecode_runtime *runtime; |
534 | ||
53b9d7db | 535 | assert(event_desc); |
e58095ef | 536 | |
621c07fc FD |
537 | /* Go over all the bytecode programs of the enabler. */ |
538 | cds_list_for_each_entry(enabler_bc, enabler_bytecode_head, node) { | |
e58095ef MD |
539 | int found = 0, ret; |
540 | struct cds_list_head *insert_loc; | |
541 | ||
621c07fc FD |
542 | /* |
543 | * Check if the current enabler bytecode program is already | |
544 | * linked with the instance. | |
545 | */ | |
546 | cds_list_for_each_entry(runtime, instance_bytecode_head, node) { | |
547 | if (runtime->bc == enabler_bc) { | |
e58095ef MD |
548 | found = 1; |
549 | break; | |
550 | } | |
551 | } | |
621c07fc FD |
552 | |
553 | /* | |
554 | * Skip bytecode already linked, go to the next enabler | |
555 | * bytecode program. | |
556 | */ | |
e58095ef MD |
557 | if (found) |
558 | continue; | |
559 | ||
560 | /* | |
561 | * Insert at specified priority (seqnum) in increasing | |
09434f96 FD |
562 | * order. If there already is a bytecode of the same priority, |
563 | * insert the new bytecode right after it. | |
e58095ef MD |
564 | */ |
565 | cds_list_for_each_entry_reverse(runtime, | |
621c07fc FD |
566 | instance_bytecode_head, node) { |
567 | if (runtime->bc->bc.seqnum <= enabler_bc->bc.seqnum) { | |
e58095ef MD |
568 | /* insert here */ |
569 | insert_loc = &runtime->node; | |
570 | goto add_within; | |
571 | } | |
572 | } | |
53b9d7db | 573 | |
e58095ef | 574 | /* Add to head to list */ |
621c07fc | 575 | insert_loc = instance_bytecode_head; |
e58095ef | 576 | add_within: |
f488575f | 577 | dbg_printf("linking bytecode\n"); |
621c07fc | 578 | ret = link_bytecode(event_desc, ctx, enabler_bc, insert_loc); |
e58095ef MD |
579 | if (ret) { |
580 | dbg_printf("[lttng filter] warning: cannot link event bytecode\n"); | |
581 | } | |
2d78951a | 582 | } |
2d78951a MD |
583 | } |
584 | ||
585 | /* | |
ab249ecf | 586 | * We own the bytecode if we return success. |
2d78951a | 587 | */ |
e58095ef | 588 | int lttng_filter_enabler_attach_bytecode(struct lttng_enabler *enabler, |
ab249ecf | 589 | struct lttng_ust_bytecode_node *bytecode) |
2d78951a | 590 | { |
ab249ecf | 591 | cds_list_add(&bytecode->node, &enabler->filter_bytecode_head); |
2d78951a MD |
592 | return 0; |
593 | } | |
f488575f | 594 | |
b77aaa1b FD |
595 | static |
596 | void free_filter_runtime(struct cds_list_head *bytecode_runtime_head) | |
f488575f MD |
597 | { |
598 | struct bytecode_runtime *runtime, *tmp; | |
599 | ||
b77aaa1b FD |
600 | cds_list_for_each_entry_safe(runtime, tmp, bytecode_runtime_head, |
601 | p.node) { | |
47e5f13e | 602 | free(runtime->data); |
f488575f MD |
603 | free(runtime); |
604 | } | |
605 | } | |
b77aaa1b FD |
606 | |
607 | void lttng_free_event_filter_runtime(struct lttng_event *event) | |
608 | { | |
a56fd376 | 609 | free_filter_runtime(&event->filter_bytecode_runtime_head); |
b77aaa1b | 610 | } |
d8d2416d FD |
611 | |
612 | void lttng_free_event_notifier_filter_runtime( | |
613 | struct lttng_event_notifier *event_notifier) | |
614 | { | |
615 | free_filter_runtime(&event_notifier->filter_bytecode_runtime_head); | |
616 | } |