Commit | Line | Data |
---|---|---|
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 | |
fc80554e | 15 | #include "context-internal.h" |
04aa13f8 | 16 | #include "lttng-bytecode.h" |
d871c65b | 17 | #include "ust-events-internal.h" |
cd54f6d9 MD |
18 | |
19 | static const char *opnames[] = { | |
04aa13f8 | 20 | [ BYTECODE_OP_UNKNOWN ] = "UNKNOWN", |
cd54f6d9 | 21 | |
04aa13f8 | 22 | [ BYTECODE_OP_RETURN ] = "RETURN", |
cd54f6d9 MD |
23 | |
24 | /* binary */ | |
04aa13f8 FD |
25 | [ BYTECODE_OP_MUL ] = "MUL", |
26 | [ BYTECODE_OP_DIV ] = "DIV", | |
27 | [ BYTECODE_OP_MOD ] = "MOD", | |
28 | [ BYTECODE_OP_PLUS ] = "PLUS", | |
29 | [ BYTECODE_OP_MINUS ] = "MINUS", | |
30 | [ BYTECODE_OP_BIT_RSHIFT ] = "BIT_RSHIFT", | |
31 | [ BYTECODE_OP_BIT_LSHIFT ] = "BIT_LSHIFT", | |
32 | [ BYTECODE_OP_BIT_AND ] = "BIT_AND", | |
33 | [ BYTECODE_OP_BIT_OR ] = "BIT_OR", | |
34 | [ BYTECODE_OP_BIT_XOR ] = "BIT_XOR", | |
226106c0 MD |
35 | |
36 | /* binary comparators */ | |
04aa13f8 FD |
37 | [ BYTECODE_OP_EQ ] = "EQ", |
38 | [ BYTECODE_OP_NE ] = "NE", | |
39 | [ BYTECODE_OP_GT ] = "GT", | |
40 | [ BYTECODE_OP_LT ] = "LT", | |
41 | [ BYTECODE_OP_GE ] = "GE", | |
42 | [ BYTECODE_OP_LE ] = "LE", | |
cd54f6d9 | 43 | |
226106c0 | 44 | /* string binary comparators */ |
04aa13f8 FD |
45 | [ BYTECODE_OP_EQ_STRING ] = "EQ_STRING", |
46 | [ BYTECODE_OP_NE_STRING ] = "NE_STRING", | |
47 | [ BYTECODE_OP_GT_STRING ] = "GT_STRING", | |
48 | [ BYTECODE_OP_LT_STRING ] = "LT_STRING", | |
49 | [ BYTECODE_OP_GE_STRING ] = "GE_STRING", | |
50 | [ BYTECODE_OP_LE_STRING ] = "LE_STRING", | |
226106c0 MD |
51 | |
52 | /* s64 binary comparators */ | |
04aa13f8 FD |
53 | [ BYTECODE_OP_EQ_S64 ] = "EQ_S64", |
54 | [ BYTECODE_OP_NE_S64 ] = "NE_S64", | |
55 | [ BYTECODE_OP_GT_S64 ] = "GT_S64", | |
56 | [ BYTECODE_OP_LT_S64 ] = "LT_S64", | |
57 | [ BYTECODE_OP_GE_S64 ] = "GE_S64", | |
58 | [ BYTECODE_OP_LE_S64 ] = "LE_S64", | |
226106c0 MD |
59 | |
60 | /* double binary comparators */ | |
04aa13f8 FD |
61 | [ BYTECODE_OP_EQ_DOUBLE ] = "EQ_DOUBLE", |
62 | [ BYTECODE_OP_NE_DOUBLE ] = "NE_DOUBLE", | |
63 | [ BYTECODE_OP_GT_DOUBLE ] = "GT_DOUBLE", | |
64 | [ BYTECODE_OP_LT_DOUBLE ] = "LT_DOUBLE", | |
65 | [ BYTECODE_OP_GE_DOUBLE ] = "GE_DOUBLE", | |
66 | [ BYTECODE_OP_LE_DOUBLE ] = "LE_DOUBLE", | |
226106c0 | 67 | |
1e5f62b4 | 68 | /* Mixed S64-double binary comparators */ |
04aa13f8 FD |
69 | [ BYTECODE_OP_EQ_DOUBLE_S64 ] = "EQ_DOUBLE_S64", |
70 | [ BYTECODE_OP_NE_DOUBLE_S64 ] = "NE_DOUBLE_S64", | |
71 | [ BYTECODE_OP_GT_DOUBLE_S64 ] = "GT_DOUBLE_S64", | |
72 | [ BYTECODE_OP_LT_DOUBLE_S64 ] = "LT_DOUBLE_S64", | |
73 | [ BYTECODE_OP_GE_DOUBLE_S64 ] = "GE_DOUBLE_S64", | |
74 | [ BYTECODE_OP_LE_DOUBLE_S64 ] = "LE_DOUBLE_S64", | |
75 | ||
76 | [ BYTECODE_OP_EQ_S64_DOUBLE ] = "EQ_S64_DOUBLE", | |
77 | [ BYTECODE_OP_NE_S64_DOUBLE ] = "NE_S64_DOUBLE", | |
78 | [ BYTECODE_OP_GT_S64_DOUBLE ] = "GT_S64_DOUBLE", | |
79 | [ BYTECODE_OP_LT_S64_DOUBLE ] = "LT_S64_DOUBLE", | |
80 | [ BYTECODE_OP_GE_S64_DOUBLE ] = "GE_S64_DOUBLE", | |
81 | [ BYTECODE_OP_LE_S64_DOUBLE ] = "LE_S64_DOUBLE", | |
226106c0 | 82 | |
cd54f6d9 | 83 | /* unary */ |
04aa13f8 FD |
84 | [ BYTECODE_OP_UNARY_PLUS ] = "UNARY_PLUS", |
85 | [ BYTECODE_OP_UNARY_MINUS ] = "UNARY_MINUS", | |
86 | [ BYTECODE_OP_UNARY_NOT ] = "UNARY_NOT", | |
87 | [ BYTECODE_OP_UNARY_PLUS_S64 ] = "UNARY_PLUS_S64", | |
88 | [ BYTECODE_OP_UNARY_MINUS_S64 ] = "UNARY_MINUS_S64", | |
89 | [ BYTECODE_OP_UNARY_NOT_S64 ] = "UNARY_NOT_S64", | |
90 | [ BYTECODE_OP_UNARY_PLUS_DOUBLE ] = "UNARY_PLUS_DOUBLE", | |
91 | [ BYTECODE_OP_UNARY_MINUS_DOUBLE ] = "UNARY_MINUS_DOUBLE", | |
92 | [ BYTECODE_OP_UNARY_NOT_DOUBLE ] = "UNARY_NOT_DOUBLE", | |
cd54f6d9 MD |
93 | |
94 | /* logical */ | |
04aa13f8 FD |
95 | [ BYTECODE_OP_AND ] = "AND", |
96 | [ BYTECODE_OP_OR ] = "OR", | |
cd54f6d9 | 97 | |
77aa5901 | 98 | /* load field ref */ |
04aa13f8 FD |
99 | [ BYTECODE_OP_LOAD_FIELD_REF ] = "LOAD_FIELD_REF", |
100 | [ BYTECODE_OP_LOAD_FIELD_REF_STRING ] = "LOAD_FIELD_REF_STRING", | |
101 | [ BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE ] = "LOAD_FIELD_REF_SEQUENCE", | |
102 | [ BYTECODE_OP_LOAD_FIELD_REF_S64 ] = "LOAD_FIELD_REF_S64", | |
103 | [ BYTECODE_OP_LOAD_FIELD_REF_DOUBLE ] = "LOAD_FIELD_REF_DOUBLE", | |
2f0145d1 | 104 | |
77aa5901 | 105 | /* load from immediate operand */ |
04aa13f8 FD |
106 | [ BYTECODE_OP_LOAD_STRING ] = "LOAD_STRING", |
107 | [ BYTECODE_OP_LOAD_S64 ] = "LOAD_S64", | |
108 | [ BYTECODE_OP_LOAD_DOUBLE ] = "LOAD_DOUBLE", | |
49905038 MD |
109 | |
110 | /* cast */ | |
04aa13f8 FD |
111 | [ BYTECODE_OP_CAST_TO_S64 ] = "CAST_TO_S64", |
112 | [ BYTECODE_OP_CAST_DOUBLE_TO_S64 ] = "CAST_DOUBLE_TO_S64", | |
113 | [ BYTECODE_OP_CAST_NOP ] = "CAST_NOP", | |
77aa5901 MD |
114 | |
115 | /* get context ref */ | |
04aa13f8 FD |
116 | [ BYTECODE_OP_GET_CONTEXT_REF ] = "GET_CONTEXT_REF", |
117 | [ BYTECODE_OP_GET_CONTEXT_REF_STRING ] = "GET_CONTEXT_REF_STRING", | |
118 | [ BYTECODE_OP_GET_CONTEXT_REF_S64 ] = "GET_CONTEXT_REF_S64", | |
119 | [ BYTECODE_OP_GET_CONTEXT_REF_DOUBLE ] = "GET_CONTEXT_REF_DOUBLE", | |
f6753f2d MD |
120 | |
121 | /* load userspace field ref */ | |
04aa13f8 FD |
122 | [ BYTECODE_OP_LOAD_FIELD_REF_USER_STRING ] = "LOAD_FIELD_REF_USER_STRING", |
123 | [ BYTECODE_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = "LOAD_FIELD_REF_USER_SEQUENCE", | |
f6753f2d MD |
124 | |
125 | /* | |
126 | * load immediate star globbing pattern (literal string) | |
127 | * from immediate. | |
128 | */ | |
04aa13f8 | 129 | [ BYTECODE_OP_LOAD_STAR_GLOB_STRING ] = "LOAD_STAR_GLOB_STRING", |
f6753f2d MD |
130 | |
131 | /* globbing pattern binary operator: apply to */ | |
04aa13f8 FD |
132 | [ BYTECODE_OP_EQ_STAR_GLOB_STRING ] = "EQ_STAR_GLOB_STRING", |
133 | [ BYTECODE_OP_NE_STAR_GLOB_STRING ] = "NE_STAR_GLOB_STRING", | |
47e5f13e MD |
134 | |
135 | /* | |
136 | * Instructions for recursive traversal through composed types. | |
137 | */ | |
04aa13f8 FD |
138 | [ BYTECODE_OP_GET_CONTEXT_ROOT ] = "GET_CONTEXT_ROOT", |
139 | [ BYTECODE_OP_GET_APP_CONTEXT_ROOT ] = "GET_APP_CONTEXT_ROOT", | |
140 | [ BYTECODE_OP_GET_PAYLOAD_ROOT ] = "GET_PAYLOAD_ROOT", | |
141 | ||
142 | [ BYTECODE_OP_GET_SYMBOL ] = "GET_SYMBOL", | |
143 | [ BYTECODE_OP_GET_SYMBOL_FIELD ] = "GET_SYMBOL_FIELD", | |
144 | [ BYTECODE_OP_GET_INDEX_U16 ] = "GET_INDEX_U16", | |
145 | [ BYTECODE_OP_GET_INDEX_U64 ] = "GET_INDEX_U64", | |
146 | ||
147 | [ BYTECODE_OP_LOAD_FIELD ] = "LOAD_FIELD", | |
148 | [ BYTECODE_OP_LOAD_FIELD_S8 ] = "LOAD_FIELD_S8", | |
149 | [ BYTECODE_OP_LOAD_FIELD_S16 ] = "LOAD_FIELD_S16", | |
150 | [ BYTECODE_OP_LOAD_FIELD_S32 ] = "LOAD_FIELD_S32", | |
151 | [ BYTECODE_OP_LOAD_FIELD_S64 ] = "LOAD_FIELD_S64", | |
152 | [ BYTECODE_OP_LOAD_FIELD_U8 ] = "LOAD_FIELD_U8", | |
153 | [ BYTECODE_OP_LOAD_FIELD_U16 ] = "LOAD_FIELD_U16", | |
154 | [ BYTECODE_OP_LOAD_FIELD_U32 ] = "LOAD_FIELD_U32", | |
155 | [ BYTECODE_OP_LOAD_FIELD_U64 ] = "LOAD_FIELD_U64", | |
156 | [ BYTECODE_OP_LOAD_FIELD_STRING ] = "LOAD_FIELD_STRING", | |
157 | [ BYTECODE_OP_LOAD_FIELD_SEQUENCE ] = "LOAD_FIELD_SEQUENCE", | |
158 | [ BYTECODE_OP_LOAD_FIELD_DOUBLE ] = "LOAD_FIELD_DOUBLE", | |
159 | ||
160 | [ BYTECODE_OP_UNARY_BIT_NOT ] = "UNARY_BIT_NOT", | |
161 | ||
162 | [ BYTECODE_OP_RETURN_S64 ] = "RETURN_S64", | |
cd54f6d9 MD |
163 | }; |
164 | ||
bf617e20 | 165 | const char *lttng_bytecode_print_op(enum bytecode_op op) |
cd54f6d9 | 166 | { |
04aa13f8 | 167 | if (op >= NR_BYTECODE_OPS) |
cd54f6d9 MD |
168 | return "UNKNOWN"; |
169 | else | |
170 | return opnames[op]; | |
171 | } | |
172 | ||
cd54f6d9 | 173 | static |
53b9d7db | 174 | int apply_field_reloc(const struct lttng_event_desc *event_desc, |
cd54f6d9 MD |
175 | struct bytecode_runtime *runtime, |
176 | uint32_t runtime_len, | |
177 | uint32_t reloc_offset, | |
47e5f13e | 178 | const char *field_name, |
04aa13f8 | 179 | enum bytecode_op bytecode_op) |
cd54f6d9 | 180 | { |
cd54f6d9 MD |
181 | const struct lttng_event_field *fields, *field = NULL; |
182 | unsigned int nr_fields, i; | |
2f0145d1 | 183 | struct load_op *op; |
cd54f6d9 MD |
184 | uint32_t field_offset = 0; |
185 | ||
77aa5901 | 186 | dbg_printf("Apply field reloc: %u %s\n", reloc_offset, field_name); |
cd54f6d9 MD |
187 | |
188 | /* Lookup event by name */ | |
53b9d7db | 189 | if (!event_desc) |
cd54f6d9 | 190 | return -EINVAL; |
53b9d7db | 191 | fields = event_desc->fields; |
cd54f6d9 MD |
192 | if (!fields) |
193 | return -EINVAL; | |
53b9d7db | 194 | nr_fields = event_desc->nr_fields; |
cd54f6d9 | 195 | for (i = 0; i < nr_fields; i++) { |
218deb69 MD |
196 | if (fields[i].u.ext.nofilter) { |
197 | continue; | |
198 | } | |
cd54f6d9 MD |
199 | if (!strcmp(fields[i].name, field_name)) { |
200 | field = &fields[i]; | |
201 | break; | |
202 | } | |
203 | /* compute field offset */ | |
204 | switch (fields[i].type.atype) { | |
205 | case atype_integer: | |
218deb69 | 206 | case atype_enum_nestable: |
cd54f6d9 MD |
207 | field_offset += sizeof(int64_t); |
208 | break; | |
218deb69 | 209 | case atype_array_nestable: |
218deb69 | 210 | case atype_sequence_nestable: |
cd54f6d9 MD |
211 | field_offset += sizeof(unsigned long); |
212 | field_offset += sizeof(void *); | |
213 | break; | |
214 | case atype_string: | |
215 | field_offset += sizeof(void *); | |
216 | break; | |
217 | case atype_float: | |
218 | field_offset += sizeof(double); | |
da6eed25 | 219 | break; |
cd54f6d9 MD |
220 | default: |
221 | return -EINVAL; | |
222 | } | |
223 | } | |
224 | if (!field) | |
225 | return -EINVAL; | |
226 | ||
227 | /* Check if field offset is too large for 16-bit offset */ | |
fd17d7ce | 228 | if (field_offset > LTTNG_UST_ABI_FILTER_BYTECODE_MAX_LEN - 1) |
cd54f6d9 MD |
229 | return -EINVAL; |
230 | ||
231 | /* set type */ | |
47e5f13e MD |
232 | op = (struct load_op *) &runtime->code[reloc_offset]; |
233 | ||
04aa13f8 FD |
234 | switch (bytecode_op) { |
235 | case BYTECODE_OP_LOAD_FIELD_REF: | |
47e5f13e MD |
236 | { |
237 | struct field_ref *field_ref; | |
238 | ||
239 | field_ref = (struct field_ref *) op->data; | |
240 | switch (field->type.atype) { | |
241 | case atype_integer: | |
218deb69 | 242 | case atype_enum_nestable: |
04aa13f8 | 243 | op->op = BYTECODE_OP_LOAD_FIELD_REF_S64; |
47e5f13e | 244 | break; |
218deb69 | 245 | case atype_array_nestable: |
218deb69 | 246 | case atype_sequence_nestable: |
04aa13f8 | 247 | op->op = BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE; |
47e5f13e MD |
248 | break; |
249 | case atype_string: | |
04aa13f8 | 250 | op->op = BYTECODE_OP_LOAD_FIELD_REF_STRING; |
47e5f13e MD |
251 | break; |
252 | case atype_float: | |
04aa13f8 | 253 | op->op = BYTECODE_OP_LOAD_FIELD_REF_DOUBLE; |
47e5f13e MD |
254 | break; |
255 | default: | |
256 | return -EINVAL; | |
257 | } | |
258 | /* set offset */ | |
259 | field_ref->offset = (uint16_t) field_offset; | |
da6eed25 | 260 | break; |
47e5f13e | 261 | } |
cd54f6d9 MD |
262 | default: |
263 | return -EINVAL; | |
264 | } | |
2d78951a MD |
265 | return 0; |
266 | } | |
267 | ||
77aa5901 | 268 | static |
53b9d7db | 269 | int apply_context_reloc(struct bytecode_runtime *runtime, |
77aa5901 MD |
270 | uint32_t runtime_len, |
271 | uint32_t reloc_offset, | |
47e5f13e | 272 | const char *context_name, |
04aa13f8 | 273 | enum bytecode_op bytecode_op) |
77aa5901 | 274 | { |
77aa5901 MD |
275 | struct load_op *op; |
276 | struct lttng_ctx_field *ctx_field; | |
277 | int idx; | |
362a65de | 278 | struct lttng_ctx **pctx = runtime->p.priv->pctx; |
77aa5901 MD |
279 | |
280 | dbg_printf("Apply context reloc: %u %s\n", reloc_offset, context_name); | |
281 | ||
282 | /* Get context index */ | |
185c7828 | 283 | idx = lttng_get_context_index(*pctx, context_name); |
53569322 MD |
284 | if (idx < 0) { |
285 | if (lttng_context_is_app(context_name)) { | |
286 | int ret; | |
287 | ||
288 | ret = lttng_ust_add_app_context_to_ctx_rcu(context_name, | |
185c7828 | 289 | pctx); |
53569322 MD |
290 | if (ret) |
291 | return ret; | |
185c7828 | 292 | idx = lttng_get_context_index(*pctx, context_name); |
53569322 MD |
293 | if (idx < 0) |
294 | return -ENOENT; | |
295 | } else { | |
296 | return -ENOENT; | |
297 | } | |
298 | } | |
77aa5901 | 299 | /* Check if idx is too large for 16-bit offset */ |
fd17d7ce | 300 | if (idx > LTTNG_UST_ABI_FILTER_BYTECODE_MAX_LEN - 1) |
77aa5901 MD |
301 | return -EINVAL; |
302 | ||
303 | /* Get context return type */ | |
185c7828 | 304 | ctx_field = &(*pctx)->fields[idx]; |
47e5f13e MD |
305 | op = (struct load_op *) &runtime->code[reloc_offset]; |
306 | ||
04aa13f8 FD |
307 | switch (bytecode_op) { |
308 | case BYTECODE_OP_GET_CONTEXT_REF: | |
47e5f13e MD |
309 | { |
310 | struct field_ref *field_ref; | |
311 | ||
312 | field_ref = (struct field_ref *) op->data; | |
313 | switch (ctx_field->event_field.type.atype) { | |
314 | case atype_integer: | |
218deb69 | 315 | case atype_enum_nestable: |
04aa13f8 | 316 | op->op = BYTECODE_OP_GET_CONTEXT_REF_S64; |
47e5f13e MD |
317 | break; |
318 | /* Sequence and array supported as string */ | |
319 | case atype_string: | |
218deb69 | 320 | case atype_array_nestable: |
218deb69 | 321 | case atype_sequence_nestable: |
04aa13f8 | 322 | op->op = BYTECODE_OP_GET_CONTEXT_REF_STRING; |
47e5f13e MD |
323 | break; |
324 | case atype_float: | |
04aa13f8 | 325 | op->op = BYTECODE_OP_GET_CONTEXT_REF_DOUBLE; |
47e5f13e MD |
326 | break; |
327 | case atype_dynamic: | |
04aa13f8 | 328 | op->op = BYTECODE_OP_GET_CONTEXT_REF; |
47e5f13e MD |
329 | break; |
330 | default: | |
331 | return -EINVAL; | |
332 | } | |
333 | /* set offset to context index within channel contexts */ | |
334 | field_ref->offset = (uint16_t) idx; | |
53569322 | 335 | break; |
47e5f13e | 336 | } |
77aa5901 MD |
337 | default: |
338 | return -EINVAL; | |
339 | } | |
77aa5901 MD |
340 | return 0; |
341 | } | |
342 | ||
343 | static | |
53b9d7db | 344 | int apply_reloc(const struct lttng_event_desc *event_desc, |
77aa5901 MD |
345 | struct bytecode_runtime *runtime, |
346 | uint32_t runtime_len, | |
347 | uint32_t reloc_offset, | |
348 | const char *name) | |
349 | { | |
350 | struct load_op *op; | |
351 | ||
352 | dbg_printf("Apply reloc: %u %s\n", reloc_offset, name); | |
353 | ||
354 | /* Ensure that the reloc is within the code */ | |
355 | if (runtime_len - reloc_offset < sizeof(uint16_t)) | |
356 | return -EINVAL; | |
357 | ||
47e5f13e | 358 | op = (struct load_op *) &runtime->code[reloc_offset]; |
77aa5901 | 359 | switch (op->op) { |
04aa13f8 | 360 | case BYTECODE_OP_LOAD_FIELD_REF: |
53b9d7db | 361 | return apply_field_reloc(event_desc, runtime, runtime_len, |
47e5f13e | 362 | reloc_offset, name, op->op); |
04aa13f8 | 363 | case BYTECODE_OP_GET_CONTEXT_REF: |
53b9d7db | 364 | return apply_context_reloc(runtime, runtime_len, |
47e5f13e | 365 | reloc_offset, name, op->op); |
04aa13f8 FD |
366 | case BYTECODE_OP_GET_SYMBOL: |
367 | case BYTECODE_OP_GET_SYMBOL_FIELD: | |
47e5f13e MD |
368 | /* |
369 | * Will be handled by load specialize phase or | |
370 | * dynamically by interpreter. | |
371 | */ | |
372 | return 0; | |
77aa5901 MD |
373 | default: |
374 | ERR("Unknown reloc op type %u\n", op->op); | |
375 | return -EINVAL; | |
376 | } | |
377 | return 0; | |
378 | } | |
379 | ||
f488575f | 380 | static |
ab249ecf | 381 | int bytecode_is_linked(struct lttng_ust_bytecode_node *bytecode, |
53b9d7db | 382 | struct cds_list_head *bytecode_runtime_head) |
f488575f MD |
383 | { |
384 | struct lttng_bytecode_runtime *bc_runtime; | |
385 | ||
53b9d7db | 386 | cds_list_for_each_entry(bc_runtime, bytecode_runtime_head, node) { |
362a65de | 387 | if (bc_runtime->priv->bc == bytecode) |
f488575f MD |
388 | return 1; |
389 | } | |
390 | return 0; | |
391 | } | |
392 | ||
cd54f6d9 MD |
393 | /* |
394 | * Take a bytecode with reloc table and link it to an event to create a | |
395 | * bytecode runtime. | |
396 | */ | |
2d78951a | 397 | static |
83a109e6 | 398 | int link_bytecode(const struct lttng_event_desc *event_desc, |
53b9d7db | 399 | struct lttng_ctx **ctx, |
ab249ecf | 400 | struct lttng_ust_bytecode_node *bytecode, |
5bdf9ccc | 401 | struct cds_list_head *bytecode_runtime_head, |
e58095ef | 402 | struct cds_list_head *insert_loc) |
2d78951a | 403 | { |
cd54f6d9 MD |
404 | int ret, offset, next_offset; |
405 | struct bytecode_runtime *runtime = NULL; | |
362a65de | 406 | struct lttng_ust_bytecode_runtime_private *runtime_priv = NULL; |
cd54f6d9 MD |
407 | size_t runtime_alloc_len; |
408 | ||
ab249ecf | 409 | if (!bytecode) |
2d78951a | 410 | return 0; |
cd54f6d9 | 411 | /* Bytecode already linked */ |
5bdf9ccc | 412 | if (bytecode_is_linked(bytecode, bytecode_runtime_head)) |
cd54f6d9 | 413 | return 0; |
2d78951a | 414 | |
f488575f | 415 | dbg_printf("Linking...\n"); |
cd54f6d9 MD |
416 | |
417 | /* We don't need the reloc table in the runtime */ | |
ab249ecf | 418 | runtime_alloc_len = sizeof(*runtime) + bytecode->bc.reloc_offset; |
cd54f6d9 MD |
419 | runtime = zmalloc(runtime_alloc_len); |
420 | if (!runtime) { | |
421 | ret = -ENOMEM; | |
e0a7d7ab | 422 | goto alloc_error; |
cd54f6d9 | 423 | } |
362a65de MD |
424 | runtime_priv = zmalloc(sizeof(struct lttng_ust_bytecode_runtime_private)); |
425 | if (!runtime_priv) { | |
426 | free(runtime); | |
427 | runtime = NULL; | |
428 | ret = -ENOMEM; | |
429 | goto alloc_error; | |
430 | } | |
431 | runtime->p.priv = runtime_priv; | |
432 | runtime_priv->pub = runtime; | |
433 | runtime_priv->bc = bytecode; | |
434 | runtime_priv->pctx = ctx; | |
ab249ecf | 435 | runtime->len = bytecode->bc.reloc_offset; |
cd54f6d9 | 436 | /* copy original bytecode */ |
ab249ecf | 437 | memcpy(runtime->code, bytecode->bc.data, runtime->len); |
cd54f6d9 MD |
438 | /* |
439 | * apply relocs. Those are a uint16_t (offset in bytecode) | |
440 | * followed by a string (field name). | |
441 | */ | |
ab249ecf FD |
442 | for (offset = bytecode->bc.reloc_offset; |
443 | offset < bytecode->bc.len; | |
cd54f6d9 MD |
444 | offset = next_offset) { |
445 | uint16_t reloc_offset = | |
ab249ecf | 446 | *(uint16_t *) &bytecode->bc.data[offset]; |
77aa5901 | 447 | const char *name = |
ab249ecf | 448 | (const char *) &bytecode->bc.data[offset + sizeof(uint16_t)]; |
cd54f6d9 | 449 | |
53b9d7db | 450 | ret = apply_reloc(event_desc, runtime, runtime->len, reloc_offset, name); |
cd54f6d9 MD |
451 | if (ret) { |
452 | goto link_error; | |
453 | } | |
77aa5901 | 454 | next_offset = offset + sizeof(uint16_t) + strlen(name) + 1; |
cd54f6d9 | 455 | } |
9522a886 | 456 | /* Validate bytecode */ |
04aa13f8 | 457 | ret = lttng_bytecode_validate(runtime); |
9522a886 MD |
458 | if (ret) { |
459 | goto link_error; | |
460 | } | |
08c84b15 | 461 | /* Specialize bytecode */ |
04aa13f8 | 462 | ret = lttng_bytecode_specialize(event_desc, runtime); |
08c84b15 MD |
463 | if (ret) { |
464 | goto link_error; | |
465 | } | |
c42416df FD |
466 | |
467 | switch (bytecode->type) { | |
468 | case LTTNG_UST_BYTECODE_NODE_TYPE_FILTER: | |
469 | runtime->p.interpreter_funcs.filter = lttng_bytecode_filter_interpret; | |
470 | break; | |
d37ecb3f FD |
471 | case LTTNG_UST_BYTECODE_NODE_TYPE_CAPTURE: |
472 | runtime->p.interpreter_funcs.capture = lttng_bytecode_capture_interpret; | |
473 | break; | |
c42416df FD |
474 | default: |
475 | abort(); | |
476 | } | |
477 | ||
362a65de | 478 | runtime->p.priv->link_failed = 0; |
e58095ef | 479 | cds_list_add_rcu(&runtime->p.node, insert_loc); |
f488575f | 480 | dbg_printf("Linking successful.\n"); |
2d78951a | 481 | return 0; |
cd54f6d9 MD |
482 | |
483 | link_error: | |
c42416df FD |
484 | switch (bytecode->type) { |
485 | case LTTNG_UST_BYTECODE_NODE_TYPE_FILTER: | |
486 | runtime->p.interpreter_funcs.filter = lttng_bytecode_filter_interpret_false; | |
487 | break; | |
d37ecb3f FD |
488 | case LTTNG_UST_BYTECODE_NODE_TYPE_CAPTURE: |
489 | runtime->p.interpreter_funcs.capture = lttng_bytecode_capture_interpret_false; | |
490 | break; | |
c42416df FD |
491 | default: |
492 | abort(); | |
493 | } | |
494 | ||
362a65de | 495 | runtime_priv->link_failed = 1; |
e58095ef | 496 | cds_list_add_rcu(&runtime->p.node, insert_loc); |
e0a7d7ab | 497 | alloc_error: |
f488575f | 498 | dbg_printf("Linking failed.\n"); |
cd54f6d9 | 499 | return ret; |
2d78951a MD |
500 | } |
501 | ||
4d451c15 | 502 | void lttng_bytecode_filter_sync_state(struct lttng_bytecode_runtime *runtime) |
2d78951a | 503 | { |
362a65de | 504 | struct lttng_ust_bytecode_node *bc = runtime->priv->bc; |
f488575f | 505 | |
362a65de | 506 | if (!bc->enabler->enabled || runtime->priv->link_failed) |
c42416df | 507 | runtime->interpreter_funcs.filter = lttng_bytecode_filter_interpret_false; |
21af05a9 | 508 | else |
c42416df | 509 | runtime->interpreter_funcs.filter = lttng_bytecode_filter_interpret; |
2d78951a MD |
510 | } |
511 | ||
d37ecb3f FD |
512 | void lttng_bytecode_capture_sync_state(struct lttng_bytecode_runtime *runtime) |
513 | { | |
362a65de | 514 | struct lttng_ust_bytecode_node *bc = runtime->priv->bc; |
d37ecb3f | 515 | |
362a65de | 516 | if (!bc->enabler->enabled || runtime->priv->link_failed) |
d37ecb3f FD |
517 | runtime->interpreter_funcs.capture = lttng_bytecode_capture_interpret_false; |
518 | else | |
519 | runtime->interpreter_funcs.capture = lttng_bytecode_capture_interpret; | |
520 | } | |
521 | ||
2d78951a | 522 | /* |
621c07fc FD |
523 | * Given the lists of bytecode programs of an instance (trigger or event) and |
524 | * of a matching enabler, try to link all the enabler's bytecode programs with | |
525 | * the instance. | |
526 | * | |
527 | * This function is called after we confirmed that name enabler and the | |
528 | * instance are name matching (or glob pattern matching). | |
2d78951a | 529 | */ |
53b9d7db FD |
530 | void lttng_enabler_link_bytecode(const struct lttng_event_desc *event_desc, |
531 | struct lttng_ctx **ctx, | |
621c07fc FD |
532 | struct cds_list_head *instance_bytecode_head, |
533 | struct cds_list_head *enabler_bytecode_head) | |
2d78951a | 534 | { |
621c07fc | 535 | struct lttng_ust_bytecode_node *enabler_bc; |
e58095ef MD |
536 | struct lttng_bytecode_runtime *runtime; |
537 | ||
53b9d7db | 538 | assert(event_desc); |
e58095ef | 539 | |
621c07fc FD |
540 | /* Go over all the bytecode programs of the enabler. */ |
541 | cds_list_for_each_entry(enabler_bc, enabler_bytecode_head, node) { | |
e58095ef MD |
542 | int found = 0, ret; |
543 | struct cds_list_head *insert_loc; | |
544 | ||
621c07fc FD |
545 | /* |
546 | * Check if the current enabler bytecode program is already | |
547 | * linked with the instance. | |
548 | */ | |
549 | cds_list_for_each_entry(runtime, instance_bytecode_head, node) { | |
362a65de | 550 | if (runtime->priv->bc == enabler_bc) { |
e58095ef MD |
551 | found = 1; |
552 | break; | |
553 | } | |
554 | } | |
621c07fc FD |
555 | |
556 | /* | |
557 | * Skip bytecode already linked, go to the next enabler | |
558 | * bytecode program. | |
559 | */ | |
e58095ef MD |
560 | if (found) |
561 | continue; | |
562 | ||
563 | /* | |
564 | * Insert at specified priority (seqnum) in increasing | |
09434f96 FD |
565 | * order. If there already is a bytecode of the same priority, |
566 | * insert the new bytecode right after it. | |
e58095ef MD |
567 | */ |
568 | cds_list_for_each_entry_reverse(runtime, | |
621c07fc | 569 | instance_bytecode_head, node) { |
362a65de | 570 | if (runtime->priv->bc->bc.seqnum <= enabler_bc->bc.seqnum) { |
e58095ef MD |
571 | /* insert here */ |
572 | insert_loc = &runtime->node; | |
573 | goto add_within; | |
574 | } | |
575 | } | |
53b9d7db | 576 | |
e58095ef | 577 | /* Add to head to list */ |
621c07fc | 578 | insert_loc = instance_bytecode_head; |
e58095ef | 579 | add_within: |
f488575f | 580 | dbg_printf("linking bytecode\n"); |
5bdf9ccc | 581 | ret = link_bytecode(event_desc, ctx, enabler_bc, instance_bytecode_head, insert_loc); |
e58095ef MD |
582 | if (ret) { |
583 | dbg_printf("[lttng filter] warning: cannot link event bytecode\n"); | |
584 | } | |
2d78951a | 585 | } |
2d78951a MD |
586 | } |
587 | ||
588 | /* | |
ab249ecf | 589 | * We own the bytecode if we return success. |
2d78951a | 590 | */ |
e58095ef | 591 | int lttng_filter_enabler_attach_bytecode(struct lttng_enabler *enabler, |
ab249ecf | 592 | struct lttng_ust_bytecode_node *bytecode) |
2d78951a | 593 | { |
ab249ecf | 594 | cds_list_add(&bytecode->node, &enabler->filter_bytecode_head); |
2d78951a MD |
595 | return 0; |
596 | } | |
f488575f | 597 | |
b77aaa1b FD |
598 | static |
599 | void free_filter_runtime(struct cds_list_head *bytecode_runtime_head) | |
f488575f MD |
600 | { |
601 | struct bytecode_runtime *runtime, *tmp; | |
602 | ||
b77aaa1b FD |
603 | cds_list_for_each_entry_safe(runtime, tmp, bytecode_runtime_head, |
604 | p.node) { | |
47e5f13e | 605 | free(runtime->data); |
362a65de | 606 | free(runtime->p.priv); |
f488575f MD |
607 | free(runtime); |
608 | } | |
609 | } | |
b77aaa1b | 610 | |
b1f720f0 | 611 | void lttng_free_event_filter_runtime(struct lttng_ust_event_common *event) |
b77aaa1b | 612 | { |
b1f720f0 | 613 | free_filter_runtime(&event->filter_bytecode_runtime_head); |
d8d2416d | 614 | } |