Commit | Line | Data |
---|---|---|
953192ba MD |
1 | /* |
2 | * filter-visitor-generate-ir.c | |
3 | * | |
4 | * LTTng filter generate intermediate representation | |
5 | * | |
ab5be9fa | 6 | * Copyright 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
953192ba | 7 | * |
ab5be9fa | 8 | * SPDX-License-Identifier: LGPL-2.1-only |
953192ba | 9 | * |
953192ba MD |
10 | */ |
11 | ||
12 | #include <stdio.h> | |
13 | #include <unistd.h> | |
14 | #include <string.h> | |
15 | #include <stdlib.h> | |
16 | #include <assert.h> | |
17 | #include <errno.h> | |
18 | #include <inttypes.h> | |
953192ba | 19 | #include "filter-ast.h" |
95b9bd90 | 20 | #include "filter-parser.h" |
953192ba MD |
21 | #include "filter-ir.h" |
22 | ||
a187da1a | 23 | #include <common/macros.h> |
9f449915 | 24 | #include <common/string-utils/string-utils.h> |
a187da1a | 25 | |
953192ba MD |
26 | static |
27 | struct ir_op *generate_ir_recursive(struct filter_parser_ctx *ctx, | |
28 | struct filter_node *node, enum ir_side side); | |
29 | ||
30 | static | |
31 | struct ir_op *make_op_root(struct ir_op *child, enum ir_side side) | |
32 | { | |
33 | struct ir_op *op; | |
34 | ||
35 | op = calloc(sizeof(struct ir_op), 1); | |
36 | if (!op) | |
37 | return NULL; | |
38 | switch (child->data_type) { | |
39 | case IR_DATA_UNKNOWN: | |
40 | default: | |
41 | fprintf(stderr, "[error] Unknown root child data type\n"); | |
7d8868f9 | 42 | free(op); |
953192ba MD |
43 | return NULL; |
44 | case IR_DATA_STRING: | |
45 | fprintf(stderr, "[error] String cannot be root data type\n"); | |
7d8868f9 | 46 | free(op); |
953192ba MD |
47 | return NULL; |
48 | case IR_DATA_NUMERIC: | |
49 | case IR_DATA_FIELD_REF: | |
586dc72f | 50 | case IR_DATA_GET_CONTEXT_REF: |
bff988fa | 51 | case IR_DATA_EXPRESSION: |
953192ba MD |
52 | /* ok */ |
53 | break; | |
54 | } | |
55 | op->op = IR_OP_ROOT; | |
56 | op->side = side; | |
57 | op->data_type = child->data_type; | |
58 | op->signedness = child->signedness; | |
59 | op->u.root.child = child; | |
60 | return op; | |
61 | } | |
62 | ||
9f449915 PP |
63 | static |
64 | enum ir_load_string_type get_literal_string_type(const char *string) | |
65 | { | |
66 | assert(string); | |
67 | ||
68 | if (strutils_is_star_glob_pattern(string)) { | |
69 | if (strutils_is_star_at_the_end_only_glob_pattern(string)) { | |
70 | return IR_LOAD_STRING_TYPE_GLOB_STAR_END; | |
71 | } | |
72 | ||
73 | return IR_LOAD_STRING_TYPE_GLOB_STAR; | |
74 | } | |
75 | ||
76 | return IR_LOAD_STRING_TYPE_PLAIN; | |
77 | } | |
78 | ||
953192ba | 79 | static |
b53d4e59 | 80 | struct ir_op *make_op_load_string(const char *string, enum ir_side side) |
953192ba MD |
81 | { |
82 | struct ir_op *op; | |
83 | ||
84 | op = calloc(sizeof(struct ir_op), 1); | |
85 | if (!op) | |
86 | return NULL; | |
87 | op->op = IR_OP_LOAD; | |
88 | op->data_type = IR_DATA_STRING; | |
89 | op->signedness = IR_SIGN_UNKNOWN; | |
90 | op->side = side; | |
9f449915 PP |
91 | op->u.load.u.string.type = get_literal_string_type(string); |
92 | op->u.load.u.string.value = strdup(string); | |
93 | if (!op->u.load.u.string.value) { | |
953192ba MD |
94 | free(op); |
95 | return NULL; | |
96 | } | |
97 | return op; | |
98 | } | |
99 | ||
100 | static | |
101 | struct ir_op *make_op_load_numeric(int64_t v, enum ir_side side) | |
102 | { | |
103 | struct ir_op *op; | |
104 | ||
105 | op = calloc(sizeof(struct ir_op), 1); | |
106 | if (!op) | |
107 | return NULL; | |
108 | op->op = IR_OP_LOAD; | |
109 | op->data_type = IR_DATA_NUMERIC; | |
110 | /* TODO: for now, all numeric values are signed */ | |
111 | op->signedness = IR_SIGNED; | |
112 | op->side = side; | |
113 | op->u.load.u.num = v; | |
114 | return op; | |
115 | } | |
116 | ||
e90d8561 MD |
117 | static |
118 | struct ir_op *make_op_load_float(double v, enum ir_side side) | |
119 | { | |
120 | struct ir_op *op; | |
121 | ||
122 | op = calloc(sizeof(struct ir_op), 1); | |
123 | if (!op) | |
124 | return NULL; | |
125 | op->op = IR_OP_LOAD; | |
126 | op->data_type = IR_DATA_FLOAT; | |
127 | op->signedness = IR_SIGN_UNKNOWN; | |
128 | op->side = side; | |
129 | op->u.load.u.flt = v; | |
130 | return op; | |
131 | } | |
132 | ||
953192ba | 133 | static |
bff988fa | 134 | void free_load_expression(struct ir_load_expression *load_expression) |
953192ba | 135 | { |
bff988fa | 136 | struct ir_load_expression_op *exp_op; |
953192ba | 137 | |
bff988fa MD |
138 | if (!load_expression) |
139 | return; | |
140 | exp_op = load_expression->child; | |
141 | for (;;) { | |
142 | struct ir_load_expression_op *prev_exp_op; | |
661dfdd1 | 143 | |
bff988fa MD |
144 | if (!exp_op) |
145 | break; | |
146 | switch (exp_op->type) { | |
147 | case IR_LOAD_EXPRESSION_GET_CONTEXT_ROOT: | |
148 | case IR_LOAD_EXPRESSION_GET_APP_CONTEXT_ROOT: | |
149 | case IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT: | |
150 | case IR_LOAD_EXPRESSION_GET_INDEX: | |
151 | case IR_LOAD_EXPRESSION_LOAD_FIELD: | |
152 | break; | |
153 | case IR_LOAD_EXPRESSION_GET_SYMBOL: | |
154 | free(exp_op->u.symbol); | |
155 | break; | |
156 | } | |
157 | prev_exp_op = exp_op; | |
158 | exp_op = exp_op->next; | |
159 | free(prev_exp_op); | |
160 | } | |
161 | free(load_expression); | |
661dfdd1 MD |
162 | } |
163 | ||
bff988fa MD |
164 | /* |
165 | * Returns the first node of the chain, after initializing the next | |
166 | * pointers. | |
167 | */ | |
661dfdd1 | 168 | static |
bff988fa | 169 | struct filter_node *load_expression_get_forward_chain(struct filter_node *node) |
661dfdd1 | 170 | { |
bff988fa | 171 | struct filter_node *prev_node; |
661dfdd1 | 172 | |
bff988fa MD |
173 | for (;;) { |
174 | assert(node->type == NODE_EXPRESSION); | |
175 | prev_node = node; | |
176 | node = node->u.expression.prev; | |
177 | if (!node) { | |
178 | break; | |
179 | } | |
180 | node->u.expression.next = prev_node; | |
953192ba | 181 | } |
bff988fa | 182 | return prev_node; |
953192ba MD |
183 | } |
184 | ||
586dc72f | 185 | static |
bff988fa | 186 | struct ir_load_expression *create_load_expression(struct filter_node *node) |
586dc72f | 187 | { |
bff988fa MD |
188 | struct ir_load_expression *load_exp; |
189 | struct ir_load_expression_op *load_exp_op, *prev_op; | |
b53d4e59 | 190 | const char *str; |
586dc72f | 191 | |
bff988fa MD |
192 | /* Get forward chain. */ |
193 | node = load_expression_get_forward_chain(node); | |
194 | if (!node) | |
586dc72f | 195 | return NULL; |
bff988fa MD |
196 | load_exp = calloc(sizeof(struct ir_load_expression), 1); |
197 | if (!load_exp) | |
198 | return NULL; | |
199 | ||
200 | /* Root */ | |
201 | load_exp_op = calloc(sizeof(struct ir_load_expression_op), 1); | |
202 | if (!load_exp_op) | |
203 | goto error; | |
204 | load_exp->child = load_exp_op; | |
205 | str = node->u.expression.u.string; | |
206 | if (!strcmp(str, "$ctx")) { | |
207 | load_exp_op->type = IR_LOAD_EXPRESSION_GET_CONTEXT_ROOT; | |
208 | node = node->u.expression.next; | |
209 | if (!node) { | |
210 | fprintf(stderr, "[error] Expecting identifier after \'%s\'\n", str); | |
211 | goto error; | |
212 | } | |
213 | str = node->u.expression.u.string; | |
214 | } else if (!strcmp(str, "$app")) { | |
215 | load_exp_op->type = IR_LOAD_EXPRESSION_GET_APP_CONTEXT_ROOT; | |
216 | node = node->u.expression.next; | |
217 | if (!node) { | |
218 | fprintf(stderr, "[error] Expecting identifier after \'%s\'\n", str); | |
219 | goto error; | |
220 | } | |
221 | str = node->u.expression.u.string; | |
222 | } else if (str[0] == '$') { | |
223 | fprintf(stderr, "[error] Unexpected identifier \'%s\'\n", str); | |
661dfdd1 | 224 | goto error; |
bff988fa MD |
225 | } else { |
226 | load_exp_op->type = IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT; | |
661dfdd1 | 227 | } |
bff988fa MD |
228 | |
229 | for (;;) { | |
230 | struct filter_node *bracket_node; | |
231 | ||
232 | prev_op = load_exp_op; | |
233 | load_exp_op = calloc(sizeof(struct ir_load_expression_op), 1); | |
234 | if (!load_exp_op) | |
235 | goto error; | |
236 | prev_op->next = load_exp_op; | |
237 | load_exp_op->type = IR_LOAD_EXPRESSION_GET_SYMBOL; | |
238 | load_exp_op->u.symbol = strdup(str); | |
239 | if (!load_exp_op->u.symbol) | |
240 | goto error; | |
241 | ||
242 | /* Explore brackets from current node. */ | |
243 | for (bracket_node = node->u.expression.next_bracket; | |
244 | bracket_node != NULL; | |
245 | bracket_node = bracket_node->u.expression.next_bracket) { | |
246 | prev_op = load_exp_op; | |
247 | load_exp_op = calloc(sizeof(struct ir_load_expression_op), 1); | |
248 | if (!load_exp_op) | |
249 | goto error; | |
250 | prev_op->next = load_exp_op; | |
251 | load_exp_op->type = IR_LOAD_EXPRESSION_GET_INDEX; | |
252 | load_exp_op->u.index = bracket_node->u.expression.u.constant; | |
253 | } | |
254 | /* Go to next chain element. */ | |
255 | node = node->u.expression.next; | |
256 | if (!node) | |
257 | break; | |
258 | str = node->u.expression.u.string; | |
259 | } | |
260 | /* Add final load field */ | |
261 | prev_op = load_exp_op; | |
262 | load_exp_op = calloc(sizeof(struct ir_load_expression_op), 1); | |
263 | if (!load_exp_op) | |
264 | goto error; | |
265 | prev_op->next = load_exp_op; | |
266 | load_exp_op->type = IR_LOAD_EXPRESSION_LOAD_FIELD; | |
267 | return load_exp; | |
661dfdd1 MD |
268 | |
269 | error: | |
bff988fa | 270 | free_load_expression(load_exp); |
661dfdd1 MD |
271 | return NULL; |
272 | } | |
273 | ||
274 | static | |
bff988fa | 275 | struct ir_op *make_op_load_expression(struct filter_node *node, |
661dfdd1 MD |
276 | enum ir_side side) |
277 | { | |
278 | struct ir_op *op; | |
279 | ||
280 | op = calloc(sizeof(struct ir_op), 1); | |
281 | if (!op) | |
586dc72f | 282 | return NULL; |
661dfdd1 | 283 | op->op = IR_OP_LOAD; |
bff988fa | 284 | op->data_type = IR_DATA_EXPRESSION; |
661dfdd1 MD |
285 | op->signedness = IR_SIGN_DYN; |
286 | op->side = side; | |
bff988fa MD |
287 | op->u.load.u.expression = create_load_expression(node); |
288 | if (!op->u.load.u.expression) { | |
661dfdd1 MD |
289 | goto error; |
290 | } | |
586dc72f | 291 | return op; |
661dfdd1 MD |
292 | |
293 | error: | |
bff988fa | 294 | free_load_expression(op->u.load.u.expression); |
661dfdd1 MD |
295 | free(op); |
296 | return NULL; | |
586dc72f MD |
297 | } |
298 | ||
953192ba MD |
299 | static |
300 | struct ir_op *make_op_unary(enum unary_op_type unary_op_type, | |
301 | const char *op_str, enum ir_op_signedness signedness, | |
302 | struct ir_op *child, enum ir_side side) | |
303 | { | |
304 | struct ir_op *op = NULL; | |
305 | ||
306 | if (child->data_type == IR_DATA_STRING) { | |
307 | fprintf(stderr, "[error] unary operation '%s' not allowed on string literal\n", op_str); | |
308 | goto error; | |
309 | } | |
310 | ||
311 | op = calloc(sizeof(struct ir_op), 1); | |
312 | if (!op) | |
313 | return NULL; | |
314 | op->op = IR_OP_UNARY; | |
315 | op->data_type = child->data_type; | |
316 | op->signedness = signedness; | |
317 | op->side = side; | |
318 | op->u.unary.type = unary_op_type; | |
319 | op->u.unary.child = child; | |
320 | return op; | |
321 | ||
322 | error: | |
323 | free(op); | |
324 | return NULL; | |
325 | } | |
326 | ||
327 | /* | |
328 | * unary + is pretty much useless. | |
329 | */ | |
330 | static | |
331 | struct ir_op *make_op_unary_plus(struct ir_op *child, enum ir_side side) | |
332 | { | |
333 | return make_op_unary(AST_UNARY_PLUS, "+", child->signedness, | |
334 | child, side); | |
335 | } | |
336 | ||
337 | static | |
338 | struct ir_op *make_op_unary_minus(struct ir_op *child, enum ir_side side) | |
339 | { | |
340 | return make_op_unary(AST_UNARY_MINUS, "-", child->signedness, | |
341 | child, side); | |
342 | } | |
343 | ||
344 | static | |
345 | struct ir_op *make_op_unary_not(struct ir_op *child, enum ir_side side) | |
346 | { | |
347 | return make_op_unary(AST_UNARY_NOT, "!", child->signedness, | |
348 | child, side); | |
349 | } | |
350 | ||
116d3c01 MD |
351 | static |
352 | struct ir_op *make_op_unary_bit_not(struct ir_op *child, enum ir_side side) | |
353 | { | |
354 | return make_op_unary(AST_UNARY_BIT_NOT, "~", child->signedness, | |
355 | child, side); | |
356 | } | |
357 | ||
953192ba MD |
358 | static |
359 | struct ir_op *make_op_binary_compare(enum op_type bin_op_type, | |
360 | const char *op_str, struct ir_op *left, struct ir_op *right, | |
361 | enum ir_side side) | |
362 | { | |
363 | struct ir_op *op = NULL; | |
364 | ||
365 | if (left->data_type == IR_DATA_UNKNOWN | |
366 | || right->data_type == IR_DATA_UNKNOWN) { | |
367 | fprintf(stderr, "[error] binary operation '%s' has unknown operand type\n", op_str); | |
368 | goto error; | |
369 | ||
370 | } | |
371 | if ((left->data_type == IR_DATA_STRING | |
e90d8561 MD |
372 | && (right->data_type == IR_DATA_NUMERIC || right->data_type == IR_DATA_FLOAT)) |
373 | || ((left->data_type == IR_DATA_NUMERIC || left->data_type == IR_DATA_FLOAT) && | |
953192ba MD |
374 | right->data_type == IR_DATA_STRING)) { |
375 | fprintf(stderr, "[error] binary operation '%s' operand type mismatch\n", op_str); | |
376 | goto error; | |
377 | } | |
378 | ||
379 | op = calloc(sizeof(struct ir_op), 1); | |
380 | if (!op) | |
381 | return NULL; | |
382 | op->op = IR_OP_BINARY; | |
383 | op->u.binary.type = bin_op_type; | |
384 | op->u.binary.left = left; | |
385 | op->u.binary.right = right; | |
386 | ||
387 | /* we return a boolean, represented as signed numeric */ | |
388 | op->data_type = IR_DATA_NUMERIC; | |
389 | op->signedness = IR_SIGNED; | |
390 | op->side = side; | |
391 | ||
392 | return op; | |
393 | ||
394 | error: | |
395 | free(op); | |
396 | return NULL; | |
397 | } | |
398 | ||
399 | static | |
400 | struct ir_op *make_op_binary_eq(struct ir_op *left, struct ir_op *right, | |
401 | enum ir_side side) | |
402 | { | |
403 | return make_op_binary_compare(AST_OP_EQ, "==", left, right, side); | |
404 | } | |
405 | ||
406 | static | |
407 | struct ir_op *make_op_binary_ne(struct ir_op *left, struct ir_op *right, | |
408 | enum ir_side side) | |
409 | { | |
410 | return make_op_binary_compare(AST_OP_NE, "!=", left, right, side); | |
411 | } | |
412 | ||
413 | static | |
414 | struct ir_op *make_op_binary_gt(struct ir_op *left, struct ir_op *right, | |
415 | enum ir_side side) | |
416 | { | |
417 | return make_op_binary_compare(AST_OP_GT, ">", left, right, side); | |
418 | } | |
419 | ||
420 | static | |
421 | struct ir_op *make_op_binary_lt(struct ir_op *left, struct ir_op *right, | |
422 | enum ir_side side) | |
423 | { | |
424 | return make_op_binary_compare(AST_OP_LT, "<", left, right, side); | |
425 | } | |
426 | ||
427 | static | |
428 | struct ir_op *make_op_binary_ge(struct ir_op *left, struct ir_op *right, | |
429 | enum ir_side side) | |
430 | { | |
431 | return make_op_binary_compare(AST_OP_GE, ">=", left, right, side); | |
432 | } | |
433 | ||
434 | static | |
435 | struct ir_op *make_op_binary_le(struct ir_op *left, struct ir_op *right, | |
436 | enum ir_side side) | |
437 | { | |
438 | return make_op_binary_compare(AST_OP_LE, "<=", left, right, side); | |
439 | } | |
440 | ||
441 | static | |
442 | struct ir_op *make_op_binary_logical(enum op_type bin_op_type, | |
443 | const char *op_str, struct ir_op *left, struct ir_op *right, | |
444 | enum ir_side side) | |
445 | { | |
446 | struct ir_op *op = NULL; | |
447 | ||
448 | if (left->data_type == IR_DATA_UNKNOWN | |
449 | || right->data_type == IR_DATA_UNKNOWN) { | |
450 | fprintf(stderr, "[error] binary operation '%s' has unknown operand type\n", op_str); | |
451 | goto error; | |
452 | ||
453 | } | |
454 | if (left->data_type == IR_DATA_STRING | |
455 | || right->data_type == IR_DATA_STRING) { | |
456 | fprintf(stderr, "[error] logical binary operation '%s' cannot have string operand\n", op_str); | |
457 | goto error; | |
458 | } | |
459 | ||
460 | op = calloc(sizeof(struct ir_op), 1); | |
461 | if (!op) | |
462 | return NULL; | |
463 | op->op = IR_OP_LOGICAL; | |
464 | op->u.binary.type = bin_op_type; | |
465 | op->u.binary.left = left; | |
466 | op->u.binary.right = right; | |
467 | ||
468 | /* we return a boolean, represented as signed numeric */ | |
469 | op->data_type = IR_DATA_NUMERIC; | |
470 | op->signedness = IR_SIGNED; | |
471 | op->side = side; | |
472 | ||
473 | return op; | |
474 | ||
475 | error: | |
476 | free(op); | |
477 | return NULL; | |
478 | } | |
479 | ||
bff988fa MD |
480 | static |
481 | struct ir_op *make_op_binary_bitwise(enum op_type bin_op_type, | |
482 | const char *op_str, struct ir_op *left, struct ir_op *right, | |
483 | enum ir_side side) | |
484 | { | |
485 | struct ir_op *op = NULL; | |
486 | ||
487 | if (left->data_type == IR_DATA_UNKNOWN | |
488 | || right->data_type == IR_DATA_UNKNOWN) { | |
489 | fprintf(stderr, "[error] bitwise binary operation '%s' has unknown operand type\n", op_str); | |
490 | goto error; | |
491 | ||
492 | } | |
493 | if (left->data_type == IR_DATA_STRING | |
494 | || right->data_type == IR_DATA_STRING) { | |
495 | fprintf(stderr, "[error] bitwise binary operation '%s' cannot have string operand\n", op_str); | |
496 | goto error; | |
497 | } | |
498 | if (left->data_type == IR_DATA_FLOAT | |
499 | || right->data_type == IR_DATA_FLOAT) { | |
500 | fprintf(stderr, "[error] bitwise binary operation '%s' cannot have floating point operand\n", op_str); | |
501 | goto error; | |
502 | } | |
503 | ||
504 | op = calloc(sizeof(struct ir_op), 1); | |
505 | if (!op) | |
506 | return NULL; | |
507 | op->op = IR_OP_BINARY; | |
508 | op->u.binary.type = bin_op_type; | |
509 | op->u.binary.left = left; | |
510 | op->u.binary.right = right; | |
511 | ||
512 | /* we return a signed numeric */ | |
513 | op->data_type = IR_DATA_NUMERIC; | |
514 | op->signedness = IR_SIGNED; | |
515 | op->side = side; | |
516 | ||
517 | return op; | |
518 | ||
519 | error: | |
520 | free(op); | |
521 | return NULL; | |
522 | } | |
523 | ||
953192ba MD |
524 | static |
525 | struct ir_op *make_op_binary_logical_and(struct ir_op *left, struct ir_op *right, | |
526 | enum ir_side side) | |
527 | { | |
528 | return make_op_binary_logical(AST_OP_AND, "&&", left, right, side); | |
529 | } | |
530 | ||
531 | static | |
532 | struct ir_op *make_op_binary_logical_or(struct ir_op *left, struct ir_op *right, | |
533 | enum ir_side side) | |
534 | { | |
535 | return make_op_binary_logical(AST_OP_OR, "||", left, right, side); | |
536 | } | |
537 | ||
116d3c01 MD |
538 | static |
539 | struct ir_op *make_op_binary_bitwise_rshift(struct ir_op *left, struct ir_op *right, | |
540 | enum ir_side side) | |
541 | { | |
542 | return make_op_binary_bitwise(AST_OP_BIT_RSHIFT, ">>", left, right, side); | |
543 | } | |
544 | ||
545 | static | |
546 | struct ir_op *make_op_binary_bitwise_lshift(struct ir_op *left, struct ir_op *right, | |
547 | enum ir_side side) | |
548 | { | |
549 | return make_op_binary_bitwise(AST_OP_BIT_LSHIFT, "<<", left, right, side); | |
550 | } | |
551 | ||
bff988fa MD |
552 | static |
553 | struct ir_op *make_op_binary_bitwise_and(struct ir_op *left, struct ir_op *right, | |
554 | enum ir_side side) | |
555 | { | |
556 | return make_op_binary_bitwise(AST_OP_BIT_AND, "&", left, right, side); | |
557 | } | |
558 | ||
559 | static | |
560 | struct ir_op *make_op_binary_bitwise_or(struct ir_op *left, struct ir_op *right, | |
561 | enum ir_side side) | |
562 | { | |
563 | return make_op_binary_bitwise(AST_OP_BIT_OR, "|", left, right, side); | |
564 | } | |
565 | ||
566 | static | |
567 | struct ir_op *make_op_binary_bitwise_xor(struct ir_op *left, struct ir_op *right, | |
568 | enum ir_side side) | |
569 | { | |
570 | return make_op_binary_bitwise(AST_OP_BIT_XOR, "^", left, right, side); | |
571 | } | |
572 | ||
953192ba MD |
573 | static |
574 | void filter_free_ir_recursive(struct ir_op *op) | |
575 | { | |
576 | if (!op) | |
577 | return; | |
578 | switch (op->op) { | |
579 | case IR_OP_UNKNOWN: | |
580 | default: | |
581 | fprintf(stderr, "[error] Unknown op type in %s\n", | |
582 | __func__); | |
583 | break; | |
584 | case IR_OP_ROOT: | |
585 | filter_free_ir_recursive(op->u.root.child); | |
586 | break; | |
587 | case IR_OP_LOAD: | |
588 | switch (op->data_type) { | |
589 | case IR_DATA_STRING: | |
9f449915 | 590 | free(op->u.load.u.string.value); |
953192ba | 591 | break; |
586dc72f MD |
592 | case IR_DATA_FIELD_REF: /* fall-through */ |
593 | case IR_DATA_GET_CONTEXT_REF: | |
953192ba MD |
594 | free(op->u.load.u.ref); |
595 | break; | |
bff988fa MD |
596 | case IR_DATA_EXPRESSION: |
597 | free_load_expression(op->u.load.u.expression); | |
953192ba MD |
598 | default: |
599 | break; | |
600 | } | |
601 | break; | |
602 | case IR_OP_UNARY: | |
603 | filter_free_ir_recursive(op->u.unary.child); | |
604 | break; | |
605 | case IR_OP_BINARY: | |
606 | filter_free_ir_recursive(op->u.binary.left); | |
607 | filter_free_ir_recursive(op->u.binary.right); | |
608 | break; | |
609 | case IR_OP_LOGICAL: | |
610 | filter_free_ir_recursive(op->u.logical.left); | |
611 | filter_free_ir_recursive(op->u.logical.right); | |
612 | break; | |
613 | } | |
614 | free(op); | |
615 | } | |
616 | ||
617 | static | |
618 | struct ir_op *make_expression(struct filter_parser_ctx *ctx, | |
619 | struct filter_node *node, enum ir_side side) | |
620 | { | |
621 | switch (node->u.expression.type) { | |
622 | case AST_EXP_UNKNOWN: | |
623 | default: | |
624 | fprintf(stderr, "[error] %s: unknown expression type\n", __func__); | |
625 | return NULL; | |
626 | ||
627 | case AST_EXP_STRING: | |
628 | return make_op_load_string(node->u.expression.u.string, side); | |
629 | case AST_EXP_CONSTANT: | |
630 | return make_op_load_numeric(node->u.expression.u.constant, | |
631 | side); | |
e90d8561 MD |
632 | case AST_EXP_FLOAT_CONSTANT: |
633 | return make_op_load_float(node->u.expression.u.float_constant, | |
634 | side); | |
953192ba | 635 | case AST_EXP_IDENTIFIER: |
586dc72f | 636 | case AST_EXP_GLOBAL_IDENTIFIER: |
bff988fa | 637 | return make_op_load_expression(node, side); |
953192ba MD |
638 | case AST_EXP_NESTED: |
639 | return generate_ir_recursive(ctx, node->u.expression.u.child, | |
640 | side); | |
641 | } | |
642 | } | |
643 | ||
644 | static | |
645 | struct ir_op *make_op(struct filter_parser_ctx *ctx, | |
646 | struct filter_node *node, enum ir_side side) | |
647 | { | |
648 | struct ir_op *op = NULL, *lchild, *rchild; | |
649 | const char *op_str = "?"; | |
650 | ||
651 | switch (node->u.op.type) { | |
652 | case AST_OP_UNKNOWN: | |
653 | default: | |
654 | fprintf(stderr, "[error] %s: unknown binary op type\n", __func__); | |
655 | return NULL; | |
656 | ||
657 | /* | |
bff988fa MD |
658 | * The following binary operators other than comparators and |
659 | * logical and/or are not supported yet. | |
953192ba MD |
660 | */ |
661 | case AST_OP_MUL: | |
662 | op_str = "*"; | |
663 | goto error_not_supported; | |
664 | case AST_OP_DIV: | |
665 | op_str = "/"; | |
666 | goto error_not_supported; | |
667 | case AST_OP_MOD: | |
668 | op_str = "%"; | |
669 | goto error_not_supported; | |
670 | case AST_OP_PLUS: | |
671 | op_str = "+"; | |
672 | goto error_not_supported; | |
673 | case AST_OP_MINUS: | |
674 | op_str = "-"; | |
675 | goto error_not_supported; | |
bff988fa | 676 | |
116d3c01 MD |
677 | case AST_OP_BIT_RSHIFT: |
678 | case AST_OP_BIT_LSHIFT: | |
bff988fa MD |
679 | case AST_OP_BIT_AND: |
680 | case AST_OP_BIT_OR: | |
681 | case AST_OP_BIT_XOR: | |
682 | lchild = generate_ir_recursive(ctx, node->u.op.lchild, IR_LEFT); | |
683 | if (!lchild) | |
684 | return NULL; | |
685 | rchild = generate_ir_recursive(ctx, node->u.op.rchild, IR_RIGHT); | |
686 | if (!rchild) { | |
687 | filter_free_ir_recursive(lchild); | |
688 | return NULL; | |
689 | } | |
690 | break; | |
953192ba MD |
691 | |
692 | case AST_OP_EQ: | |
693 | case AST_OP_NE: | |
694 | case AST_OP_GT: | |
695 | case AST_OP_LT: | |
696 | case AST_OP_GE: | |
697 | case AST_OP_LE: | |
698 | lchild = generate_ir_recursive(ctx, node->u.op.lchild, IR_LEFT); | |
699 | if (!lchild) | |
700 | return NULL; | |
701 | rchild = generate_ir_recursive(ctx, node->u.op.rchild, IR_RIGHT); | |
702 | if (!rchild) { | |
703 | filter_free_ir_recursive(lchild); | |
704 | return NULL; | |
705 | } | |
706 | break; | |
707 | ||
708 | case AST_OP_AND: | |
709 | case AST_OP_OR: | |
710 | /* | |
711 | * Both children considered as left, since we need to | |
712 | * populate R0. | |
713 | */ | |
714 | lchild = generate_ir_recursive(ctx, node->u.op.lchild, IR_LEFT); | |
715 | if (!lchild) | |
716 | return NULL; | |
717 | rchild = generate_ir_recursive(ctx, node->u.op.rchild, IR_LEFT); | |
718 | if (!rchild) { | |
719 | filter_free_ir_recursive(lchild); | |
720 | return NULL; | |
721 | } | |
722 | break; | |
723 | } | |
724 | ||
725 | switch (node->u.op.type) { | |
726 | case AST_OP_AND: | |
727 | op = make_op_binary_logical_and(lchild, rchild, side); | |
728 | break; | |
729 | case AST_OP_OR: | |
730 | op = make_op_binary_logical_or(lchild, rchild, side); | |
731 | break; | |
732 | case AST_OP_EQ: | |
733 | op = make_op_binary_eq(lchild, rchild, side); | |
734 | break; | |
735 | case AST_OP_NE: | |
736 | op = make_op_binary_ne(lchild, rchild, side); | |
737 | break; | |
738 | case AST_OP_GT: | |
739 | op = make_op_binary_gt(lchild, rchild, side); | |
740 | break; | |
741 | case AST_OP_LT: | |
742 | op = make_op_binary_lt(lchild, rchild, side); | |
743 | break; | |
744 | case AST_OP_GE: | |
745 | op = make_op_binary_ge(lchild, rchild, side); | |
746 | break; | |
747 | case AST_OP_LE: | |
748 | op = make_op_binary_le(lchild, rchild, side); | |
749 | break; | |
116d3c01 MD |
750 | case AST_OP_BIT_RSHIFT: |
751 | op = make_op_binary_bitwise_rshift(lchild, rchild, side); | |
752 | break; | |
753 | case AST_OP_BIT_LSHIFT: | |
754 | op = make_op_binary_bitwise_lshift(lchild, rchild, side); | |
755 | break; | |
bff988fa MD |
756 | case AST_OP_BIT_AND: |
757 | op = make_op_binary_bitwise_and(lchild, rchild, side); | |
758 | break; | |
759 | case AST_OP_BIT_OR: | |
760 | op = make_op_binary_bitwise_or(lchild, rchild, side); | |
761 | break; | |
762 | case AST_OP_BIT_XOR: | |
763 | op = make_op_binary_bitwise_xor(lchild, rchild, side); | |
764 | break; | |
953192ba MD |
765 | default: |
766 | break; | |
767 | } | |
768 | ||
769 | if (!op) { | |
770 | filter_free_ir_recursive(rchild); | |
771 | filter_free_ir_recursive(lchild); | |
772 | } | |
773 | return op; | |
774 | ||
775 | error_not_supported: | |
776 | fprintf(stderr, "[error] %s: binary operation '%s' not supported\n", | |
777 | __func__, op_str); | |
778 | return NULL; | |
779 | } | |
780 | ||
781 | static | |
782 | struct ir_op *make_unary_op(struct filter_parser_ctx *ctx, | |
783 | struct filter_node *node, enum ir_side side) | |
784 | { | |
785 | switch (node->u.unary_op.type) { | |
786 | case AST_UNARY_UNKNOWN: | |
787 | default: | |
788 | fprintf(stderr, "[error] %s: unknown unary op type\n", __func__); | |
789 | return NULL; | |
790 | ||
791 | case AST_UNARY_PLUS: | |
792 | { | |
793 | struct ir_op *op, *child; | |
794 | ||
795 | child = generate_ir_recursive(ctx, node->u.unary_op.child, | |
796 | side); | |
797 | if (!child) | |
798 | return NULL; | |
799 | op = make_op_unary_plus(child, side); | |
800 | if (!op) { | |
801 | filter_free_ir_recursive(child); | |
802 | return NULL; | |
803 | } | |
804 | return op; | |
805 | } | |
806 | case AST_UNARY_MINUS: | |
807 | { | |
808 | struct ir_op *op, *child; | |
809 | ||
810 | child = generate_ir_recursive(ctx, node->u.unary_op.child, | |
811 | side); | |
812 | if (!child) | |
813 | return NULL; | |
814 | op = make_op_unary_minus(child, side); | |
815 | if (!op) { | |
816 | filter_free_ir_recursive(child); | |
817 | return NULL; | |
818 | } | |
819 | return op; | |
820 | } | |
821 | case AST_UNARY_NOT: | |
822 | { | |
823 | struct ir_op *op, *child; | |
824 | ||
825 | child = generate_ir_recursive(ctx, node->u.unary_op.child, | |
826 | side); | |
827 | if (!child) | |
828 | return NULL; | |
829 | op = make_op_unary_not(child, side); | |
830 | if (!op) { | |
831 | filter_free_ir_recursive(child); | |
832 | return NULL; | |
833 | } | |
834 | return op; | |
835 | } | |
bff988fa | 836 | case AST_UNARY_BIT_NOT: |
ab78f161 | 837 | { |
116d3c01 MD |
838 | struct ir_op *op, *child; |
839 | ||
840 | child = generate_ir_recursive(ctx, node->u.unary_op.child, | |
841 | side); | |
842 | if (!child) | |
843 | return NULL; | |
844 | op = make_op_unary_bit_not(child, side); | |
845 | if (!op) { | |
846 | filter_free_ir_recursive(child); | |
847 | return NULL; | |
848 | } | |
849 | return op; | |
ab78f161 | 850 | } |
953192ba | 851 | } |
ab78f161 | 852 | |
ab78f161 | 853 | return NULL; |
953192ba MD |
854 | } |
855 | ||
856 | static | |
857 | struct ir_op *generate_ir_recursive(struct filter_parser_ctx *ctx, | |
858 | struct filter_node *node, enum ir_side side) | |
859 | { | |
860 | switch (node->type) { | |
861 | case NODE_UNKNOWN: | |
862 | default: | |
863 | fprintf(stderr, "[error] %s: unknown node type\n", __func__); | |
864 | return NULL; | |
865 | ||
866 | case NODE_ROOT: | |
867 | { | |
868 | struct ir_op *op, *child; | |
869 | ||
870 | child = generate_ir_recursive(ctx, node->u.root.child, | |
871 | side); | |
872 | if (!child) | |
873 | return NULL; | |
874 | op = make_op_root(child, side); | |
875 | if (!op) { | |
876 | filter_free_ir_recursive(child); | |
877 | return NULL; | |
878 | } | |
879 | return op; | |
880 | } | |
881 | case NODE_EXPRESSION: | |
882 | return make_expression(ctx, node, side); | |
883 | case NODE_OP: | |
884 | return make_op(ctx, node, side); | |
885 | case NODE_UNARY_OP: | |
886 | return make_unary_op(ctx, node, side); | |
887 | } | |
888 | return 0; | |
889 | } | |
890 | ||
a187da1a | 891 | LTTNG_HIDDEN |
953192ba MD |
892 | void filter_ir_free(struct filter_parser_ctx *ctx) |
893 | { | |
894 | filter_free_ir_recursive(ctx->ir_root); | |
895 | ctx->ir_root = NULL; | |
896 | } | |
897 | ||
a187da1a | 898 | LTTNG_HIDDEN |
953192ba MD |
899 | int filter_visitor_ir_generate(struct filter_parser_ctx *ctx) |
900 | { | |
901 | struct ir_op *op; | |
902 | ||
903 | op = generate_ir_recursive(ctx, &ctx->ast->root, IR_LEFT); | |
904 | if (!op) { | |
905 | return -EINVAL; | |
906 | } | |
907 | ctx->ir_root = op; | |
908 | return 0; | |
909 | } |