Commit | Line | Data |
---|---|---|
97b58163 MD |
1 | /* |
2 | * lttng-filter-interpreter.c | |
3 | * | |
4 | * LTTng UST filter interpreter. | |
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 "lttng-filter.h" | |
24 | ||
25 | /* | |
26 | * -1: wildcard found. | |
27 | * -2: unknown escape char. | |
28 | * 0: normal char. | |
29 | */ | |
30 | ||
31 | static | |
32 | int parse_char(const char **p) | |
33 | { | |
34 | switch (**p) { | |
35 | case '\\': | |
36 | (*p)++; | |
37 | switch (**p) { | |
38 | case '\\': | |
39 | case '*': | |
40 | return 0; | |
41 | default: | |
42 | return -2; | |
43 | } | |
44 | case '*': | |
45 | return -1; | |
46 | default: | |
47 | return 0; | |
48 | } | |
49 | } | |
50 | ||
51 | static | |
9b33aac4 | 52 | int stack_strcmp(struct estack *stack, int top, const char *cmp_type) |
97b58163 | 53 | { |
9b33aac4 | 54 | const char *p = estack_bx(stack, top)->u.s.str, *q = estack_ax(stack, top)->u.s.str; |
97b58163 MD |
55 | int ret; |
56 | int diff; | |
57 | ||
58 | for (;;) { | |
59 | int escaped_r0 = 0; | |
60 | ||
332335cd MD |
61 | if (unlikely(p - estack_bx(stack, top)->u.s.str >= estack_bx(stack, top)->u.s.seq_len || *p == '\0')) { |
62 | if (q - estack_ax(stack, top)->u.s.str >= estack_ax(stack, top)->u.s.seq_len || *q == '\0') { | |
5cf8141d | 63 | return 0; |
a0928c1e | 64 | } else { |
5cf8141d MD |
65 | if (estack_ax(stack, top)->u.s.literal) { |
66 | ret = parse_char(&q); | |
67 | if (ret == -1) | |
68 | return 0; | |
69 | } | |
70 | return -1; | |
a0928c1e | 71 | } |
97b58163 | 72 | } |
332335cd | 73 | if (unlikely(q - estack_ax(stack, top)->u.s.str >= estack_ax(stack, top)->u.s.seq_len || *q == '\0')) { |
867df2ba MD |
74 | if (estack_bx(stack, top)->u.s.literal) { |
75 | ret = parse_char(&p); | |
76 | if (ret == -1) | |
77 | return 0; | |
a0928c1e | 78 | } |
867df2ba | 79 | return 1; |
97b58163 | 80 | } |
9b33aac4 | 81 | if (estack_bx(stack, top)->u.s.literal) { |
97b58163 MD |
82 | ret = parse_char(&p); |
83 | if (ret == -1) { | |
84 | return 0; | |
85 | } else if (ret == -2) { | |
86 | escaped_r0 = 1; | |
87 | } | |
88 | /* else compare both char */ | |
89 | } | |
9b33aac4 | 90 | if (estack_ax(stack, top)->u.s.literal) { |
97b58163 MD |
91 | ret = parse_char(&q); |
92 | if (ret == -1) { | |
93 | return 0; | |
94 | } else if (ret == -2) { | |
95 | if (!escaped_r0) | |
96 | return -1; | |
97 | } else { | |
98 | if (escaped_r0) | |
99 | return 1; | |
100 | } | |
101 | } else { | |
102 | if (escaped_r0) | |
103 | return 1; | |
104 | } | |
105 | diff = *p - *q; | |
106 | if (diff != 0) | |
107 | break; | |
108 | p++; | |
109 | q++; | |
110 | } | |
111 | return diff; | |
112 | } | |
113 | ||
8a92ed2a | 114 | uint64_t lttng_filter_false(void *filter_data, |
97b58163 MD |
115 | const char *filter_stack_data) |
116 | { | |
117 | return 0; | |
118 | } | |
119 | ||
120 | #ifdef INTERPRETER_USE_SWITCH | |
121 | ||
122 | /* | |
123 | * Fallback for compilers that do not support taking address of labels. | |
124 | */ | |
125 | ||
126 | #define START_OP \ | |
127 | start_pc = &bytecode->data[0]; \ | |
128 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; \ | |
129 | pc = next_pc) { \ | |
130 | dbg_printf("Executing op %s (%u)\n", \ | |
131 | print_op((unsigned int) *(filter_opcode_t *) pc), \ | |
132 | (unsigned int) *(filter_opcode_t *) pc); \ | |
133 | switch (*(filter_opcode_t *) pc) { | |
134 | ||
135 | #define OP(name) case name | |
136 | ||
137 | #define PO break | |
138 | ||
139 | #define END_OP } \ | |
140 | } | |
141 | ||
142 | #else | |
143 | ||
144 | /* | |
145 | * Dispatch-table based interpreter. | |
146 | */ | |
147 | ||
148 | #define START_OP \ | |
149 | start_pc = &bytecode->data[0]; \ | |
150 | pc = next_pc = start_pc; \ | |
151 | if (unlikely(pc - start_pc >= bytecode->len)) \ | |
152 | goto end; \ | |
153 | goto *dispatch[*(filter_opcode_t *) pc]; | |
154 | ||
155 | #define OP(name) \ | |
156 | LABEL_##name | |
157 | ||
158 | #define PO \ | |
159 | pc = next_pc; \ | |
160 | goto *dispatch[*(filter_opcode_t *) pc]; | |
161 | ||
162 | #define END_OP | |
163 | ||
164 | #endif | |
165 | ||
8a92ed2a MD |
166 | /* |
167 | * Return 0 (discard), or raise the 0x1 flag (log event). | |
168 | * Currently, other flags are kept for future extensions and have no | |
169 | * effect. | |
170 | */ | |
171 | uint64_t lttng_filter_interpret_bytecode(void *filter_data, | |
97b58163 MD |
172 | const char *filter_stack_data) |
173 | { | |
174 | struct bytecode_runtime *bytecode = filter_data; | |
175 | void *pc, *next_pc, *start_pc; | |
176 | int ret = -EINVAL; | |
8b82df15 | 177 | uint64_t retval = 0; |
0305960f MD |
178 | struct estack _stack; |
179 | struct estack *stack = &_stack; | |
9b33aac4 MD |
180 | register int64_t ax = 0, bx = 0; |
181 | register int top = FILTER_STACK_EMPTY; | |
97b58163 MD |
182 | #ifndef INTERPRETER_USE_SWITCH |
183 | static void *dispatch[NR_FILTER_OPS] = { | |
184 | [ FILTER_OP_UNKNOWN ] = &&LABEL_FILTER_OP_UNKNOWN, | |
185 | ||
186 | [ FILTER_OP_RETURN ] = &&LABEL_FILTER_OP_RETURN, | |
187 | ||
188 | /* binary */ | |
189 | [ FILTER_OP_MUL ] = &&LABEL_FILTER_OP_MUL, | |
190 | [ FILTER_OP_DIV ] = &&LABEL_FILTER_OP_DIV, | |
191 | [ FILTER_OP_MOD ] = &&LABEL_FILTER_OP_MOD, | |
192 | [ FILTER_OP_PLUS ] = &&LABEL_FILTER_OP_PLUS, | |
193 | [ FILTER_OP_MINUS ] = &&LABEL_FILTER_OP_MINUS, | |
194 | [ FILTER_OP_RSHIFT ] = &&LABEL_FILTER_OP_RSHIFT, | |
195 | [ FILTER_OP_LSHIFT ] = &&LABEL_FILTER_OP_LSHIFT, | |
196 | [ FILTER_OP_BIN_AND ] = &&LABEL_FILTER_OP_BIN_AND, | |
197 | [ FILTER_OP_BIN_OR ] = &&LABEL_FILTER_OP_BIN_OR, | |
198 | [ FILTER_OP_BIN_XOR ] = &&LABEL_FILTER_OP_BIN_XOR, | |
199 | ||
200 | /* binary comparators */ | |
201 | [ FILTER_OP_EQ ] = &&LABEL_FILTER_OP_EQ, | |
202 | [ FILTER_OP_NE ] = &&LABEL_FILTER_OP_NE, | |
203 | [ FILTER_OP_GT ] = &&LABEL_FILTER_OP_GT, | |
204 | [ FILTER_OP_LT ] = &&LABEL_FILTER_OP_LT, | |
205 | [ FILTER_OP_GE ] = &&LABEL_FILTER_OP_GE, | |
206 | [ FILTER_OP_LE ] = &&LABEL_FILTER_OP_LE, | |
207 | ||
208 | /* string binary comparator */ | |
209 | [ FILTER_OP_EQ_STRING ] = &&LABEL_FILTER_OP_EQ_STRING, | |
210 | [ FILTER_OP_NE_STRING ] = &&LABEL_FILTER_OP_NE_STRING, | |
211 | [ FILTER_OP_GT_STRING ] = &&LABEL_FILTER_OP_GT_STRING, | |
212 | [ FILTER_OP_LT_STRING ] = &&LABEL_FILTER_OP_LT_STRING, | |
213 | [ FILTER_OP_GE_STRING ] = &&LABEL_FILTER_OP_GE_STRING, | |
214 | [ FILTER_OP_LE_STRING ] = &&LABEL_FILTER_OP_LE_STRING, | |
215 | ||
216 | /* s64 binary comparator */ | |
217 | [ FILTER_OP_EQ_S64 ] = &&LABEL_FILTER_OP_EQ_S64, | |
218 | [ FILTER_OP_NE_S64 ] = &&LABEL_FILTER_OP_NE_S64, | |
219 | [ FILTER_OP_GT_S64 ] = &&LABEL_FILTER_OP_GT_S64, | |
220 | [ FILTER_OP_LT_S64 ] = &&LABEL_FILTER_OP_LT_S64, | |
221 | [ FILTER_OP_GE_S64 ] = &&LABEL_FILTER_OP_GE_S64, | |
222 | [ FILTER_OP_LE_S64 ] = &&LABEL_FILTER_OP_LE_S64, | |
223 | ||
224 | /* double binary comparator */ | |
225 | [ FILTER_OP_EQ_DOUBLE ] = &&LABEL_FILTER_OP_EQ_DOUBLE, | |
226 | [ FILTER_OP_NE_DOUBLE ] = &&LABEL_FILTER_OP_NE_DOUBLE, | |
227 | [ FILTER_OP_GT_DOUBLE ] = &&LABEL_FILTER_OP_GT_DOUBLE, | |
228 | [ FILTER_OP_LT_DOUBLE ] = &&LABEL_FILTER_OP_LT_DOUBLE, | |
229 | [ FILTER_OP_GE_DOUBLE ] = &&LABEL_FILTER_OP_GE_DOUBLE, | |
230 | [ FILTER_OP_LE_DOUBLE ] = &&LABEL_FILTER_OP_LE_DOUBLE, | |
231 | ||
dbea82ec MD |
232 | /* Mixed S64-double binary comparators */ |
233 | [ FILTER_OP_EQ_DOUBLE_S64 ] = &&LABEL_FILTER_OP_EQ_DOUBLE_S64, | |
234 | [ FILTER_OP_NE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_NE_DOUBLE_S64, | |
235 | [ FILTER_OP_GT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GT_DOUBLE_S64, | |
236 | [ FILTER_OP_LT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LT_DOUBLE_S64, | |
237 | [ FILTER_OP_GE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GE_DOUBLE_S64, | |
238 | [ FILTER_OP_LE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LE_DOUBLE_S64, | |
239 | ||
240 | [ FILTER_OP_EQ_S64_DOUBLE ] = &&LABEL_FILTER_OP_EQ_S64_DOUBLE, | |
241 | [ FILTER_OP_NE_S64_DOUBLE ] = &&LABEL_FILTER_OP_NE_S64_DOUBLE, | |
242 | [ FILTER_OP_GT_S64_DOUBLE ] = &&LABEL_FILTER_OP_GT_S64_DOUBLE, | |
243 | [ FILTER_OP_LT_S64_DOUBLE ] = &&LABEL_FILTER_OP_LT_S64_DOUBLE, | |
244 | [ FILTER_OP_GE_S64_DOUBLE ] = &&LABEL_FILTER_OP_GE_S64_DOUBLE, | |
245 | [ FILTER_OP_LE_S64_DOUBLE ] = &&LABEL_FILTER_OP_LE_S64_DOUBLE, | |
246 | ||
97b58163 MD |
247 | /* unary */ |
248 | [ FILTER_OP_UNARY_PLUS ] = &&LABEL_FILTER_OP_UNARY_PLUS, | |
249 | [ FILTER_OP_UNARY_MINUS ] = &&LABEL_FILTER_OP_UNARY_MINUS, | |
250 | [ FILTER_OP_UNARY_NOT ] = &&LABEL_FILTER_OP_UNARY_NOT, | |
251 | [ FILTER_OP_UNARY_PLUS_S64 ] = &&LABEL_FILTER_OP_UNARY_PLUS_S64, | |
252 | [ FILTER_OP_UNARY_MINUS_S64 ] = &&LABEL_FILTER_OP_UNARY_MINUS_S64, | |
253 | [ FILTER_OP_UNARY_NOT_S64 ] = &&LABEL_FILTER_OP_UNARY_NOT_S64, | |
254 | [ FILTER_OP_UNARY_PLUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_PLUS_DOUBLE, | |
255 | [ FILTER_OP_UNARY_MINUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_MINUS_DOUBLE, | |
256 | [ FILTER_OP_UNARY_NOT_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_NOT_DOUBLE, | |
257 | ||
258 | /* logical */ | |
259 | [ FILTER_OP_AND ] = &&LABEL_FILTER_OP_AND, | |
260 | [ FILTER_OP_OR ] = &&LABEL_FILTER_OP_OR, | |
261 | ||
77aa5901 | 262 | /* load field ref */ |
97b58163 MD |
263 | [ FILTER_OP_LOAD_FIELD_REF ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF, |
264 | [ FILTER_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_STRING, | |
265 | [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_SEQUENCE, | |
266 | [ FILTER_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_S64, | |
267 | [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_DOUBLE, | |
268 | ||
77aa5901 | 269 | /* load from immediate operand */ |
97b58163 MD |
270 | [ FILTER_OP_LOAD_STRING ] = &&LABEL_FILTER_OP_LOAD_STRING, |
271 | [ FILTER_OP_LOAD_S64 ] = &&LABEL_FILTER_OP_LOAD_S64, | |
272 | [ FILTER_OP_LOAD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_DOUBLE, | |
273 | ||
274 | /* cast */ | |
275 | [ FILTER_OP_CAST_TO_S64 ] = &&LABEL_FILTER_OP_CAST_TO_S64, | |
276 | [ FILTER_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_FILTER_OP_CAST_DOUBLE_TO_S64, | |
277 | [ FILTER_OP_CAST_NOP ] = &&LABEL_FILTER_OP_CAST_NOP, | |
77aa5901 MD |
278 | |
279 | /* get context ref */ | |
280 | [ FILTER_OP_GET_CONTEXT_REF ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF, | |
281 | [ FILTER_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_STRING, | |
282 | [ FILTER_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_S64, | |
283 | [ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_DOUBLE, | |
97b58163 MD |
284 | }; |
285 | #endif /* #ifndef INTERPRETER_USE_SWITCH */ | |
286 | ||
287 | START_OP | |
288 | ||
289 | OP(FILTER_OP_UNKNOWN): | |
290 | OP(FILTER_OP_LOAD_FIELD_REF): | |
77aa5901 | 291 | OP(FILTER_OP_GET_CONTEXT_REF): |
97b58163 MD |
292 | #ifdef INTERPRETER_USE_SWITCH |
293 | default: | |
294 | #endif /* INTERPRETER_USE_SWITCH */ | |
295 | ERR("unknown bytecode op %u\n", | |
296 | (unsigned int) *(filter_opcode_t *) pc); | |
297 | ret = -EINVAL; | |
298 | goto end; | |
299 | ||
300 | OP(FILTER_OP_RETURN): | |
8a92ed2a | 301 | /* LTTNG_FILTER_DISCARD or LTTNG_FILTER_RECORD_FLAG */ |
9b33aac4 | 302 | retval = !!estack_ax_v; |
97b58163 MD |
303 | ret = 0; |
304 | goto end; | |
305 | ||
306 | /* binary */ | |
307 | OP(FILTER_OP_MUL): | |
308 | OP(FILTER_OP_DIV): | |
309 | OP(FILTER_OP_MOD): | |
310 | OP(FILTER_OP_PLUS): | |
311 | OP(FILTER_OP_MINUS): | |
312 | OP(FILTER_OP_RSHIFT): | |
313 | OP(FILTER_OP_LSHIFT): | |
314 | OP(FILTER_OP_BIN_AND): | |
315 | OP(FILTER_OP_BIN_OR): | |
316 | OP(FILTER_OP_BIN_XOR): | |
317 | ERR("unsupported bytecode op %u\n", | |
318 | (unsigned int) *(filter_opcode_t *) pc); | |
319 | ret = -EINVAL; | |
320 | goto end; | |
321 | ||
322 | OP(FILTER_OP_EQ): | |
323 | OP(FILTER_OP_NE): | |
324 | OP(FILTER_OP_GT): | |
325 | OP(FILTER_OP_LT): | |
326 | OP(FILTER_OP_GE): | |
327 | OP(FILTER_OP_LE): | |
328 | ERR("unsupported non-specialized bytecode op %u\n", | |
329 | (unsigned int) *(filter_opcode_t *) pc); | |
330 | ret = -EINVAL; | |
331 | goto end; | |
332 | ||
333 | OP(FILTER_OP_EQ_STRING): | |
334 | { | |
0305960f MD |
335 | int res; |
336 | ||
9b33aac4 MD |
337 | res = (stack_strcmp(stack, top, "==") == 0); |
338 | estack_pop(stack, top, ax, bx); | |
339 | estack_ax_v = res; | |
97b58163 MD |
340 | next_pc += sizeof(struct binary_op); |
341 | PO; | |
342 | } | |
343 | OP(FILTER_OP_NE_STRING): | |
344 | { | |
0305960f MD |
345 | int res; |
346 | ||
9b33aac4 MD |
347 | res = (stack_strcmp(stack, top, "!=") != 0); |
348 | estack_pop(stack, top, ax, bx); | |
349 | estack_ax_v = res; | |
97b58163 MD |
350 | next_pc += sizeof(struct binary_op); |
351 | PO; | |
352 | } | |
353 | OP(FILTER_OP_GT_STRING): | |
354 | { | |
0305960f MD |
355 | int res; |
356 | ||
9b33aac4 MD |
357 | res = (stack_strcmp(stack, top, ">") > 0); |
358 | estack_pop(stack, top, ax, bx); | |
359 | estack_ax_v = res; | |
97b58163 MD |
360 | next_pc += sizeof(struct binary_op); |
361 | PO; | |
362 | } | |
363 | OP(FILTER_OP_LT_STRING): | |
364 | { | |
0305960f MD |
365 | int res; |
366 | ||
9b33aac4 MD |
367 | res = (stack_strcmp(stack, top, "<") < 0); |
368 | estack_pop(stack, top, ax, bx); | |
369 | estack_ax_v = res; | |
97b58163 MD |
370 | next_pc += sizeof(struct binary_op); |
371 | PO; | |
372 | } | |
373 | OP(FILTER_OP_GE_STRING): | |
374 | { | |
0305960f MD |
375 | int res; |
376 | ||
9b33aac4 MD |
377 | res = (stack_strcmp(stack, top, ">=") >= 0); |
378 | estack_pop(stack, top, ax, bx); | |
379 | estack_ax_v = res; | |
97b58163 MD |
380 | next_pc += sizeof(struct binary_op); |
381 | PO; | |
382 | } | |
383 | OP(FILTER_OP_LE_STRING): | |
384 | { | |
0305960f MD |
385 | int res; |
386 | ||
9b33aac4 MD |
387 | res = (stack_strcmp(stack, top, "<=") <= 0); |
388 | estack_pop(stack, top, ax, bx); | |
389 | estack_ax_v = res; | |
97b58163 MD |
390 | next_pc += sizeof(struct binary_op); |
391 | PO; | |
392 | } | |
393 | ||
394 | OP(FILTER_OP_EQ_S64): | |
395 | { | |
0305960f MD |
396 | int res; |
397 | ||
9b33aac4 MD |
398 | res = (estack_bx_v == estack_ax_v); |
399 | estack_pop(stack, top, ax, bx); | |
400 | estack_ax_v = res; | |
97b58163 MD |
401 | next_pc += sizeof(struct binary_op); |
402 | PO; | |
403 | } | |
404 | OP(FILTER_OP_NE_S64): | |
405 | { | |
0305960f MD |
406 | int res; |
407 | ||
9b33aac4 MD |
408 | res = (estack_bx_v != estack_ax_v); |
409 | estack_pop(stack, top, ax, bx); | |
410 | estack_ax_v = res; | |
97b58163 MD |
411 | next_pc += sizeof(struct binary_op); |
412 | PO; | |
413 | } | |
414 | OP(FILTER_OP_GT_S64): | |
415 | { | |
0305960f MD |
416 | int res; |
417 | ||
9b33aac4 MD |
418 | res = (estack_bx_v > estack_ax_v); |
419 | estack_pop(stack, top, ax, bx); | |
420 | estack_ax_v = res; | |
97b58163 MD |
421 | next_pc += sizeof(struct binary_op); |
422 | PO; | |
423 | } | |
424 | OP(FILTER_OP_LT_S64): | |
425 | { | |
0305960f MD |
426 | int res; |
427 | ||
9b33aac4 MD |
428 | res = (estack_bx_v < estack_ax_v); |
429 | estack_pop(stack, top, ax, bx); | |
430 | estack_ax_v = res; | |
97b58163 MD |
431 | next_pc += sizeof(struct binary_op); |
432 | PO; | |
433 | } | |
434 | OP(FILTER_OP_GE_S64): | |
435 | { | |
0305960f MD |
436 | int res; |
437 | ||
9b33aac4 MD |
438 | res = (estack_bx_v >= estack_ax_v); |
439 | estack_pop(stack, top, ax, bx); | |
440 | estack_ax_v = res; | |
97b58163 MD |
441 | next_pc += sizeof(struct binary_op); |
442 | PO; | |
443 | } | |
444 | OP(FILTER_OP_LE_S64): | |
445 | { | |
0305960f MD |
446 | int res; |
447 | ||
9b33aac4 MD |
448 | res = (estack_bx_v <= estack_ax_v); |
449 | estack_pop(stack, top, ax, bx); | |
450 | estack_ax_v = res; | |
97b58163 MD |
451 | next_pc += sizeof(struct binary_op); |
452 | PO; | |
453 | } | |
454 | ||
455 | OP(FILTER_OP_EQ_DOUBLE): | |
456 | { | |
0305960f MD |
457 | int res; |
458 | ||
9b33aac4 MD |
459 | res = (estack_bx(stack, top)->u.d == estack_ax(stack, top)->u.d); |
460 | estack_pop(stack, top, ax, bx); | |
461 | estack_ax_v = res; | |
97b58163 MD |
462 | next_pc += sizeof(struct binary_op); |
463 | PO; | |
464 | } | |
465 | OP(FILTER_OP_NE_DOUBLE): | |
466 | { | |
0305960f MD |
467 | int res; |
468 | ||
9b33aac4 MD |
469 | res = (estack_bx(stack, top)->u.d != estack_ax(stack, top)->u.d); |
470 | estack_pop(stack, top, ax, bx); | |
471 | estack_ax_v = res; | |
97b58163 MD |
472 | next_pc += sizeof(struct binary_op); |
473 | PO; | |
474 | } | |
475 | OP(FILTER_OP_GT_DOUBLE): | |
476 | { | |
0305960f MD |
477 | int res; |
478 | ||
9b33aac4 MD |
479 | res = (estack_bx(stack, top)->u.d > estack_ax(stack, top)->u.d); |
480 | estack_pop(stack, top, ax, bx); | |
481 | estack_ax_v = res; | |
97b58163 MD |
482 | next_pc += sizeof(struct binary_op); |
483 | PO; | |
484 | } | |
485 | OP(FILTER_OP_LT_DOUBLE): | |
486 | { | |
0305960f MD |
487 | int res; |
488 | ||
9b33aac4 MD |
489 | res = (estack_bx(stack, top)->u.d < estack_ax(stack, top)->u.d); |
490 | estack_pop(stack, top, ax, bx); | |
491 | estack_ax_v = res; | |
97b58163 MD |
492 | next_pc += sizeof(struct binary_op); |
493 | PO; | |
494 | } | |
495 | OP(FILTER_OP_GE_DOUBLE): | |
496 | { | |
0305960f MD |
497 | int res; |
498 | ||
9b33aac4 MD |
499 | res = (estack_bx(stack, top)->u.d >= estack_ax(stack, top)->u.d); |
500 | estack_pop(stack, top, ax, bx); | |
501 | estack_ax_v = res; | |
97b58163 MD |
502 | next_pc += sizeof(struct binary_op); |
503 | PO; | |
504 | } | |
505 | OP(FILTER_OP_LE_DOUBLE): | |
506 | { | |
0305960f MD |
507 | int res; |
508 | ||
9b33aac4 MD |
509 | res = (estack_bx(stack, top)->u.d <= estack_ax(stack, top)->u.d); |
510 | estack_pop(stack, top, ax, bx); | |
511 | estack_ax_v = res; | |
dbea82ec MD |
512 | next_pc += sizeof(struct binary_op); |
513 | PO; | |
514 | } | |
515 | ||
516 | /* Mixed S64-double binary comparators */ | |
517 | OP(FILTER_OP_EQ_DOUBLE_S64): | |
518 | { | |
519 | int res; | |
520 | ||
9b33aac4 MD |
521 | res = (estack_bx(stack, top)->u.d == estack_ax_v); |
522 | estack_pop(stack, top, ax, bx); | |
523 | estack_ax_v = res; | |
dbea82ec MD |
524 | next_pc += sizeof(struct binary_op); |
525 | PO; | |
526 | } | |
527 | OP(FILTER_OP_NE_DOUBLE_S64): | |
528 | { | |
529 | int res; | |
530 | ||
9b33aac4 MD |
531 | res = (estack_bx(stack, top)->u.d != estack_ax_v); |
532 | estack_pop(stack, top, ax, bx); | |
533 | estack_ax_v = res; | |
dbea82ec MD |
534 | next_pc += sizeof(struct binary_op); |
535 | PO; | |
536 | } | |
537 | OP(FILTER_OP_GT_DOUBLE_S64): | |
538 | { | |
539 | int res; | |
540 | ||
9b33aac4 MD |
541 | res = (estack_bx(stack, top)->u.d > estack_ax_v); |
542 | estack_pop(stack, top, ax, bx); | |
543 | estack_ax_v = res; | |
dbea82ec MD |
544 | next_pc += sizeof(struct binary_op); |
545 | PO; | |
546 | } | |
547 | OP(FILTER_OP_LT_DOUBLE_S64): | |
548 | { | |
549 | int res; | |
550 | ||
9b33aac4 MD |
551 | res = (estack_bx(stack, top)->u.d < estack_ax_v); |
552 | estack_pop(stack, top, ax, bx); | |
553 | estack_ax_v = res; | |
dbea82ec MD |
554 | next_pc += sizeof(struct binary_op); |
555 | PO; | |
556 | } | |
557 | OP(FILTER_OP_GE_DOUBLE_S64): | |
558 | { | |
559 | int res; | |
560 | ||
9b33aac4 MD |
561 | res = (estack_bx(stack, top)->u.d >= estack_ax_v); |
562 | estack_pop(stack, top, ax, bx); | |
563 | estack_ax_v = res; | |
dbea82ec MD |
564 | next_pc += sizeof(struct binary_op); |
565 | PO; | |
566 | } | |
567 | OP(FILTER_OP_LE_DOUBLE_S64): | |
568 | { | |
569 | int res; | |
570 | ||
9b33aac4 MD |
571 | res = (estack_bx(stack, top)->u.d <= estack_ax_v); |
572 | estack_pop(stack, top, ax, bx); | |
573 | estack_ax_v = res; | |
dbea82ec MD |
574 | next_pc += sizeof(struct binary_op); |
575 | PO; | |
576 | } | |
577 | ||
578 | OP(FILTER_OP_EQ_S64_DOUBLE): | |
579 | { | |
580 | int res; | |
581 | ||
9b33aac4 MD |
582 | res = (estack_bx_v == estack_ax(stack, top)->u.d); |
583 | estack_pop(stack, top, ax, bx); | |
584 | estack_ax_v = res; | |
dbea82ec MD |
585 | next_pc += sizeof(struct binary_op); |
586 | PO; | |
587 | } | |
588 | OP(FILTER_OP_NE_S64_DOUBLE): | |
589 | { | |
590 | int res; | |
591 | ||
9b33aac4 MD |
592 | res = (estack_bx_v != estack_ax(stack, top)->u.d); |
593 | estack_pop(stack, top, ax, bx); | |
594 | estack_ax_v = res; | |
dbea82ec MD |
595 | next_pc += sizeof(struct binary_op); |
596 | PO; | |
597 | } | |
598 | OP(FILTER_OP_GT_S64_DOUBLE): | |
599 | { | |
600 | int res; | |
601 | ||
9b33aac4 MD |
602 | res = (estack_bx_v > estack_ax(stack, top)->u.d); |
603 | estack_pop(stack, top, ax, bx); | |
604 | estack_ax_v = res; | |
dbea82ec MD |
605 | next_pc += sizeof(struct binary_op); |
606 | PO; | |
607 | } | |
608 | OP(FILTER_OP_LT_S64_DOUBLE): | |
609 | { | |
610 | int res; | |
611 | ||
9b33aac4 MD |
612 | res = (estack_bx_v < estack_ax(stack, top)->u.d); |
613 | estack_pop(stack, top, ax, bx); | |
614 | estack_ax_v = res; | |
dbea82ec MD |
615 | next_pc += sizeof(struct binary_op); |
616 | PO; | |
617 | } | |
618 | OP(FILTER_OP_GE_S64_DOUBLE): | |
619 | { | |
620 | int res; | |
621 | ||
9b33aac4 MD |
622 | res = (estack_bx_v >= estack_ax(stack, top)->u.d); |
623 | estack_pop(stack, top, ax, bx); | |
624 | estack_ax_v = res; | |
dbea82ec MD |
625 | next_pc += sizeof(struct binary_op); |
626 | PO; | |
627 | } | |
628 | OP(FILTER_OP_LE_S64_DOUBLE): | |
629 | { | |
630 | int res; | |
631 | ||
9b33aac4 MD |
632 | res = (estack_bx_v <= estack_ax(stack, top)->u.d); |
633 | estack_pop(stack, top, ax, bx); | |
634 | estack_ax_v = res; | |
97b58163 MD |
635 | next_pc += sizeof(struct binary_op); |
636 | PO; | |
637 | } | |
638 | ||
639 | /* unary */ | |
640 | OP(FILTER_OP_UNARY_PLUS): | |
641 | OP(FILTER_OP_UNARY_MINUS): | |
642 | OP(FILTER_OP_UNARY_NOT): | |
643 | ERR("unsupported non-specialized bytecode op %u\n", | |
644 | (unsigned int) *(filter_opcode_t *) pc); | |
645 | ret = -EINVAL; | |
646 | goto end; | |
647 | ||
648 | ||
649 | OP(FILTER_OP_UNARY_PLUS_S64): | |
650 | OP(FILTER_OP_UNARY_PLUS_DOUBLE): | |
651 | { | |
652 | next_pc += sizeof(struct unary_op); | |
653 | PO; | |
654 | } | |
655 | OP(FILTER_OP_UNARY_MINUS_S64): | |
656 | { | |
9b33aac4 | 657 | estack_ax_v = -estack_ax_v; |
97b58163 MD |
658 | next_pc += sizeof(struct unary_op); |
659 | PO; | |
660 | } | |
661 | OP(FILTER_OP_UNARY_MINUS_DOUBLE): | |
662 | { | |
9b33aac4 | 663 | estack_ax(stack, top)->u.d = -estack_ax(stack, top)->u.d; |
97b58163 MD |
664 | next_pc += sizeof(struct unary_op); |
665 | PO; | |
666 | } | |
667 | OP(FILTER_OP_UNARY_NOT_S64): | |
668 | { | |
9b33aac4 | 669 | estack_ax_v = !estack_ax_v; |
97b58163 MD |
670 | next_pc += sizeof(struct unary_op); |
671 | PO; | |
672 | } | |
673 | OP(FILTER_OP_UNARY_NOT_DOUBLE): | |
674 | { | |
9b33aac4 | 675 | estack_ax(stack, top)->u.d = !estack_ax(stack, top)->u.d; |
97b58163 MD |
676 | next_pc += sizeof(struct unary_op); |
677 | PO; | |
678 | } | |
679 | ||
680 | /* logical */ | |
681 | OP(FILTER_OP_AND): | |
682 | { | |
683 | struct logical_op *insn = (struct logical_op *) pc; | |
684 | ||
0305960f | 685 | /* If AX is 0, skip and evaluate to 0 */ |
9b33aac4 | 686 | if (unlikely(estack_ax_v == 0)) { |
97b58163 MD |
687 | dbg_printf("Jumping to bytecode offset %u\n", |
688 | (unsigned int) insn->skip_offset); | |
689 | next_pc = start_pc + insn->skip_offset; | |
690 | } else { | |
71c1ceeb | 691 | /* Pop 1 when jump not taken */ |
9b33aac4 | 692 | estack_pop(stack, top, ax, bx); |
97b58163 MD |
693 | next_pc += sizeof(struct logical_op); |
694 | } | |
695 | PO; | |
696 | } | |
697 | OP(FILTER_OP_OR): | |
698 | { | |
699 | struct logical_op *insn = (struct logical_op *) pc; | |
700 | ||
0305960f | 701 | /* If AX is nonzero, skip and evaluate to 1 */ |
97b58163 | 702 | |
9b33aac4 MD |
703 | if (unlikely(estack_ax_v != 0)) { |
704 | estack_ax_v = 1; | |
97b58163 MD |
705 | dbg_printf("Jumping to bytecode offset %u\n", |
706 | (unsigned int) insn->skip_offset); | |
707 | next_pc = start_pc + insn->skip_offset; | |
708 | } else { | |
71c1ceeb | 709 | /* Pop 1 when jump not taken */ |
9b33aac4 | 710 | estack_pop(stack, top, ax, bx); |
97b58163 MD |
711 | next_pc += sizeof(struct logical_op); |
712 | } | |
713 | PO; | |
714 | } | |
715 | ||
716 | ||
77aa5901 | 717 | /* load field ref */ |
97b58163 MD |
718 | OP(FILTER_OP_LOAD_FIELD_REF_STRING): |
719 | { | |
720 | struct load_op *insn = (struct load_op *) pc; | |
721 | struct field_ref *ref = (struct field_ref *) insn->data; | |
722 | ||
723 | dbg_printf("load field ref offset %u type string\n", | |
724 | ref->offset); | |
9b33aac4 MD |
725 | estack_push(stack, top, ax, bx); |
726 | estack_ax(stack, top)->u.s.str = | |
97b58163 | 727 | *(const char * const *) &filter_stack_data[ref->offset]; |
9b33aac4 | 728 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { |
97b58163 MD |
729 | dbg_printf("Filter warning: loading a NULL string.\n"); |
730 | ret = -EINVAL; | |
731 | goto end; | |
732 | } | |
9b33aac4 MD |
733 | estack_ax(stack, top)->u.s.seq_len = UINT_MAX; |
734 | estack_ax(stack, top)->u.s.literal = 0; | |
735 | dbg_printf("ref load string %s\n", estack_ax(stack, top)->u.s.str); | |
97b58163 MD |
736 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
737 | PO; | |
738 | } | |
739 | ||
740 | OP(FILTER_OP_LOAD_FIELD_REF_SEQUENCE): | |
741 | { | |
742 | struct load_op *insn = (struct load_op *) pc; | |
743 | struct field_ref *ref = (struct field_ref *) insn->data; | |
744 | ||
745 | dbg_printf("load field ref offset %u type sequence\n", | |
746 | ref->offset); | |
9b33aac4 MD |
747 | estack_push(stack, top, ax, bx); |
748 | estack_ax(stack, top)->u.s.seq_len = | |
97b58163 | 749 | *(unsigned long *) &filter_stack_data[ref->offset]; |
9b33aac4 | 750 | estack_ax(stack, top)->u.s.str = |
97b58163 MD |
751 | *(const char **) (&filter_stack_data[ref->offset |
752 | + sizeof(unsigned long)]); | |
9b33aac4 | 753 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { |
97b58163 MD |
754 | dbg_printf("Filter warning: loading a NULL sequence.\n"); |
755 | ret = -EINVAL; | |
756 | goto end; | |
757 | } | |
9b33aac4 | 758 | estack_ax(stack, top)->u.s.literal = 0; |
97b58163 MD |
759 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
760 | PO; | |
761 | } | |
762 | ||
763 | OP(FILTER_OP_LOAD_FIELD_REF_S64): | |
764 | { | |
765 | struct load_op *insn = (struct load_op *) pc; | |
766 | struct field_ref *ref = (struct field_ref *) insn->data; | |
767 | ||
768 | dbg_printf("load field ref offset %u type s64\n", | |
769 | ref->offset); | |
9b33aac4 MD |
770 | estack_push(stack, top, ax, bx); |
771 | estack_ax_v = | |
772 | ((struct literal_numeric *) &filter_stack_data[ref->offset])->v; | |
773 | dbg_printf("ref load s64 %" PRIi64 "\n", estack_ax_v); | |
97b58163 MD |
774 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
775 | PO; | |
776 | } | |
777 | ||
778 | OP(FILTER_OP_LOAD_FIELD_REF_DOUBLE): | |
779 | { | |
780 | struct load_op *insn = (struct load_op *) pc; | |
781 | struct field_ref *ref = (struct field_ref *) insn->data; | |
782 | ||
783 | dbg_printf("load field ref offset %u type double\n", | |
784 | ref->offset); | |
9b33aac4 MD |
785 | estack_push(stack, top, ax, bx); |
786 | memcpy(&estack_ax(stack, top)->u.d, &filter_stack_data[ref->offset], | |
97b58163 | 787 | sizeof(struct literal_double)); |
9b33aac4 | 788 | dbg_printf("ref load double %g\n", estack_ax(stack, top)->u.d); |
97b58163 MD |
789 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
790 | PO; | |
791 | } | |
792 | ||
77aa5901 | 793 | /* load from immediate operand */ |
97b58163 MD |
794 | OP(FILTER_OP_LOAD_STRING): |
795 | { | |
796 | struct load_op *insn = (struct load_op *) pc; | |
797 | ||
798 | dbg_printf("load string %s\n", insn->data); | |
9b33aac4 MD |
799 | estack_push(stack, top, ax, bx); |
800 | estack_ax(stack, top)->u.s.str = insn->data; | |
801 | estack_ax(stack, top)->u.s.seq_len = UINT_MAX; | |
802 | estack_ax(stack, top)->u.s.literal = 1; | |
97b58163 MD |
803 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
804 | PO; | |
805 | } | |
806 | ||
807 | OP(FILTER_OP_LOAD_S64): | |
808 | { | |
809 | struct load_op *insn = (struct load_op *) pc; | |
810 | ||
9b33aac4 MD |
811 | estack_push(stack, top, ax, bx); |
812 | estack_ax_v = ((struct literal_numeric *) insn->data)->v; | |
813 | dbg_printf("load s64 %" PRIi64 "\n", estack_ax_v); | |
97b58163 MD |
814 | next_pc += sizeof(struct load_op) |
815 | + sizeof(struct literal_numeric); | |
816 | PO; | |
817 | } | |
818 | ||
819 | OP(FILTER_OP_LOAD_DOUBLE): | |
820 | { | |
821 | struct load_op *insn = (struct load_op *) pc; | |
822 | ||
9b33aac4 MD |
823 | estack_push(stack, top, ax, bx); |
824 | memcpy(&estack_ax(stack, top)->u.d, insn->data, | |
97b58163 | 825 | sizeof(struct literal_double)); |
9b33aac4 | 826 | dbg_printf("load s64 %g\n", estack_ax(stack, top)->u.d); |
97b58163 MD |
827 | next_pc += sizeof(struct load_op) |
828 | + sizeof(struct literal_double); | |
829 | PO; | |
830 | } | |
831 | ||
832 | /* cast */ | |
833 | OP(FILTER_OP_CAST_TO_S64): | |
834 | ERR("unsupported non-specialized bytecode op %u\n", | |
835 | (unsigned int) *(filter_opcode_t *) pc); | |
836 | ret = -EINVAL; | |
837 | goto end; | |
838 | ||
839 | OP(FILTER_OP_CAST_DOUBLE_TO_S64): | |
840 | { | |
9b33aac4 | 841 | estack_ax_v = (int64_t) estack_ax(stack, top)->u.d; |
97b58163 MD |
842 | next_pc += sizeof(struct cast_op); |
843 | PO; | |
844 | } | |
845 | ||
846 | OP(FILTER_OP_CAST_NOP): | |
847 | { | |
848 | next_pc += sizeof(struct cast_op); | |
849 | PO; | |
850 | } | |
851 | ||
77aa5901 MD |
852 | /* get context ref */ |
853 | OP(FILTER_OP_GET_CONTEXT_REF_STRING): | |
854 | { | |
855 | struct load_op *insn = (struct load_op *) pc; | |
856 | struct field_ref *ref = (struct field_ref *) insn->data; | |
857 | struct lttng_ctx_field *ctx_field; | |
858 | union lttng_ctx_value v; | |
859 | ||
860 | dbg_printf("get context ref offset %u type string\n", | |
861 | ref->offset); | |
a0a3bef9 | 862 | ctx_field = <tng_static_ctx->fields[ref->offset]; |
77aa5901 MD |
863 | ctx_field->get_value(ctx_field, &v); |
864 | estack_push(stack, top, ax, bx); | |
865 | estack_ax(stack, top)->u.s.str = v.str; | |
866 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
867 | dbg_printf("Filter warning: loading a NULL string.\n"); | |
868 | ret = -EINVAL; | |
869 | goto end; | |
870 | } | |
871 | estack_ax(stack, top)->u.s.seq_len = UINT_MAX; | |
872 | estack_ax(stack, top)->u.s.literal = 0; | |
873 | dbg_printf("ref get context string %s\n", estack_ax(stack, top)->u.s.str); | |
874 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
875 | PO; | |
876 | } | |
877 | ||
878 | OP(FILTER_OP_GET_CONTEXT_REF_S64): | |
879 | { | |
880 | struct load_op *insn = (struct load_op *) pc; | |
881 | struct field_ref *ref = (struct field_ref *) insn->data; | |
882 | struct lttng_ctx_field *ctx_field; | |
883 | union lttng_ctx_value v; | |
884 | ||
885 | dbg_printf("get context ref offset %u type s64\n", | |
886 | ref->offset); | |
a0a3bef9 | 887 | ctx_field = <tng_static_ctx->fields[ref->offset]; |
77aa5901 MD |
888 | ctx_field->get_value(ctx_field, &v); |
889 | estack_push(stack, top, ax, bx); | |
890 | estack_ax_v = v.s64; | |
891 | dbg_printf("ref get context s64 %" PRIi64 "\n", estack_ax_v); | |
892 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
893 | PO; | |
894 | } | |
895 | ||
896 | OP(FILTER_OP_GET_CONTEXT_REF_DOUBLE): | |
897 | { | |
898 | struct load_op *insn = (struct load_op *) pc; | |
899 | struct field_ref *ref = (struct field_ref *) insn->data; | |
900 | struct lttng_ctx_field *ctx_field; | |
901 | union lttng_ctx_value v; | |
902 | ||
903 | dbg_printf("get context ref offset %u type double\n", | |
904 | ref->offset); | |
a0a3bef9 | 905 | ctx_field = <tng_static_ctx->fields[ref->offset]; |
77aa5901 MD |
906 | ctx_field->get_value(ctx_field, &v); |
907 | estack_push(stack, top, ax, bx); | |
908 | memcpy(&estack_ax(stack, top)->u.d, &v.d, sizeof(struct literal_double)); | |
909 | dbg_printf("ref get context double %g\n", estack_ax(stack, top)->u.d); | |
910 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
911 | PO; | |
912 | } | |
913 | ||
97b58163 MD |
914 | END_OP |
915 | end: | |
916 | /* return 0 (discard) on error */ | |
917 | if (ret) | |
918 | return 0; | |
919 | return retval; | |
920 | } | |
921 | ||
922 | #undef START_OP | |
923 | #undef OP | |
924 | #undef PO | |
925 | #undef END_OP |