Commit | Line | Data |
---|---|---|
9f36eaed MJ |
1 | /* SPDX-License-Identifier: MIT |
2 | * | |
07dfc1d0 MD |
3 | * lttng-filter-interpreter.c |
4 | * | |
5 | * LTTng modules filter interpreter. | |
6 | * | |
bbf3aef5 | 7 | * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
07dfc1d0 MD |
8 | */ |
9 | ||
80bb2600 | 10 | #include <wrapper/uaccess.h> |
63155590 | 11 | #include <wrapper/frame.h> |
cbc19040 | 12 | #include <wrapper/types.h> |
3834b99f | 13 | #include <linux/swab.h> |
f127e61e | 14 | |
2df37e95 MD |
15 | #include <lttng/filter.h> |
16 | #include <lttng/string-utils.h> | |
07dfc1d0 | 17 | |
63155590 MD |
18 | LTTNG_STACK_FRAME_NON_STANDARD(lttng_filter_interpret_bytecode); |
19 | ||
f127e61e MD |
20 | /* |
21 | * get_char should be called with page fault handler disabled if it is expected | |
22 | * to handle user-space read. | |
23 | */ | |
24 | static | |
25 | char get_char(struct estack_entry *reg, size_t offset) | |
26 | { | |
27 | if (unlikely(offset >= reg->u.s.seq_len)) | |
28 | return '\0'; | |
29 | if (reg->u.s.user) { | |
30 | char c; | |
31 | ||
32 | /* Handle invalid access as end of string. */ | |
80bb2600 | 33 | if (unlikely(!lttng_access_ok(VERIFY_READ, |
f127e61e MD |
34 | reg->u.s.user_str + offset, |
35 | sizeof(c)))) | |
36 | return '\0'; | |
37 | /* Handle fault (nonzero return value) as end of string. */ | |
38 | if (unlikely(__copy_from_user_inatomic(&c, | |
39 | reg->u.s.user_str + offset, | |
40 | sizeof(c)))) | |
41 | return '\0'; | |
42 | return c; | |
43 | } else { | |
44 | return reg->u.s.str[offset]; | |
45 | } | |
46 | } | |
47 | ||
07dfc1d0 MD |
48 | /* |
49 | * -1: wildcard found. | |
50 | * -2: unknown escape char. | |
51 | * 0: normal char. | |
52 | */ | |
07dfc1d0 | 53 | static |
f127e61e | 54 | int parse_char(struct estack_entry *reg, char *c, size_t *offset) |
07dfc1d0 | 55 | { |
f127e61e | 56 | switch (*c) { |
07dfc1d0 | 57 | case '\\': |
f127e61e MD |
58 | (*offset)++; |
59 | *c = get_char(reg, *offset); | |
60 | switch (*c) { | |
07dfc1d0 MD |
61 | case '\\': |
62 | case '*': | |
63 | return 0; | |
64 | default: | |
65 | return -2; | |
66 | } | |
67 | case '*': | |
68 | return -1; | |
69 | default: | |
70 | return 0; | |
71 | } | |
72 | } | |
73 | ||
02aca193 PP |
74 | static |
75 | char get_char_at_cb(size_t at, void *data) | |
76 | { | |
77 | return get_char(data, at); | |
78 | } | |
79 | ||
80 | static | |
81 | int stack_star_glob_match(struct estack *stack, int top, const char *cmp_type) | |
82 | { | |
83 | bool has_user = false; | |
84 | mm_segment_t old_fs; | |
85 | int result; | |
86 | struct estack_entry *pattern_reg; | |
87 | struct estack_entry *candidate_reg; | |
88 | ||
89 | if (estack_bx(stack, top)->u.s.user | |
90 | || estack_ax(stack, top)->u.s.user) { | |
91 | has_user = true; | |
92 | old_fs = get_fs(); | |
93 | set_fs(KERNEL_DS); | |
94 | pagefault_disable(); | |
95 | } | |
96 | ||
97 | /* Find out which side is the pattern vs. the candidate. */ | |
98 | if (estack_ax(stack, top)->u.s.literal_type == ESTACK_STRING_LITERAL_TYPE_STAR_GLOB) { | |
99 | pattern_reg = estack_ax(stack, top); | |
100 | candidate_reg = estack_bx(stack, top); | |
101 | } else { | |
102 | pattern_reg = estack_bx(stack, top); | |
103 | candidate_reg = estack_ax(stack, top); | |
104 | } | |
105 | ||
106 | /* Perform the match operation. */ | |
107 | result = !strutils_star_glob_match_char_cb(get_char_at_cb, | |
108 | pattern_reg, get_char_at_cb, candidate_reg); | |
109 | if (has_user) { | |
110 | pagefault_enable(); | |
111 | set_fs(old_fs); | |
112 | } | |
113 | ||
114 | return result; | |
115 | } | |
116 | ||
07dfc1d0 MD |
117 | static |
118 | int stack_strcmp(struct estack *stack, int top, const char *cmp_type) | |
119 | { | |
f127e61e MD |
120 | size_t offset_bx = 0, offset_ax = 0; |
121 | int diff, has_user = 0; | |
122 | mm_segment_t old_fs; | |
123 | ||
124 | if (estack_bx(stack, top)->u.s.user | |
125 | || estack_ax(stack, top)->u.s.user) { | |
126 | has_user = 1; | |
127 | old_fs = get_fs(); | |
128 | set_fs(KERNEL_DS); | |
129 | pagefault_disable(); | |
130 | } | |
07dfc1d0 MD |
131 | |
132 | for (;;) { | |
f127e61e | 133 | int ret; |
07dfc1d0 | 134 | int escaped_r0 = 0; |
f127e61e | 135 | char char_bx, char_ax; |
07dfc1d0 | 136 | |
f127e61e MD |
137 | char_bx = get_char(estack_bx(stack, top), offset_bx); |
138 | char_ax = get_char(estack_ax(stack, top), offset_ax); | |
139 | ||
140 | if (unlikely(char_bx == '\0')) { | |
141 | if (char_ax == '\0') { | |
142 | diff = 0; | |
143 | break; | |
07dfc1d0 | 144 | } else { |
02aca193 PP |
145 | if (estack_ax(stack, top)->u.s.literal_type == |
146 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
147 | ret = parse_char(estack_ax(stack, top), |
148 | &char_ax, &offset_ax); | |
149 | if (ret == -1) { | |
150 | diff = 0; | |
151 | break; | |
152 | } | |
07dfc1d0 | 153 | } |
f127e61e MD |
154 | diff = -1; |
155 | break; | |
07dfc1d0 MD |
156 | } |
157 | } | |
f127e61e | 158 | if (unlikely(char_ax == '\0')) { |
02aca193 PP |
159 | if (estack_bx(stack, top)->u.s.literal_type == |
160 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
abfd272b MD |
161 | ret = parse_char(estack_bx(stack, top), |
162 | &char_bx, &offset_bx); | |
163 | if (ret == -1) { | |
164 | diff = 0; | |
165 | break; | |
07dfc1d0 | 166 | } |
07dfc1d0 | 167 | } |
abfd272b MD |
168 | diff = 1; |
169 | break; | |
07dfc1d0 | 170 | } |
02aca193 PP |
171 | if (estack_bx(stack, top)->u.s.literal_type == |
172 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
173 | ret = parse_char(estack_bx(stack, top), |
174 | &char_bx, &offset_bx); | |
07dfc1d0 | 175 | if (ret == -1) { |
f127e61e MD |
176 | diff = 0; |
177 | break; | |
07dfc1d0 MD |
178 | } else if (ret == -2) { |
179 | escaped_r0 = 1; | |
180 | } | |
181 | /* else compare both char */ | |
182 | } | |
02aca193 PP |
183 | if (estack_ax(stack, top)->u.s.literal_type == |
184 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
185 | ret = parse_char(estack_ax(stack, top), |
186 | &char_ax, &offset_ax); | |
07dfc1d0 | 187 | if (ret == -1) { |
f127e61e MD |
188 | diff = 0; |
189 | break; | |
07dfc1d0 | 190 | } else if (ret == -2) { |
f127e61e MD |
191 | if (!escaped_r0) { |
192 | diff = -1; | |
193 | break; | |
194 | } | |
07dfc1d0 | 195 | } else { |
f127e61e MD |
196 | if (escaped_r0) { |
197 | diff = 1; | |
198 | break; | |
199 | } | |
07dfc1d0 MD |
200 | } |
201 | } else { | |
f127e61e MD |
202 | if (escaped_r0) { |
203 | diff = 1; | |
204 | break; | |
205 | } | |
07dfc1d0 | 206 | } |
f127e61e | 207 | diff = char_bx - char_ax; |
07dfc1d0 MD |
208 | if (diff != 0) |
209 | break; | |
f127e61e MD |
210 | offset_bx++; |
211 | offset_ax++; | |
212 | } | |
213 | if (has_user) { | |
214 | pagefault_enable(); | |
215 | set_fs(old_fs); | |
07dfc1d0 MD |
216 | } |
217 | return diff; | |
218 | } | |
219 | ||
220 | uint64_t lttng_filter_false(void *filter_data, | |
79150a49 | 221 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 MD |
222 | const char *filter_stack_data) |
223 | { | |
a93d4e71 | 224 | return LTTNG_FILTER_DISCARD; |
07dfc1d0 MD |
225 | } |
226 | ||
227 | #ifdef INTERPRETER_USE_SWITCH | |
228 | ||
229 | /* | |
230 | * Fallback for compilers that do not support taking address of labels. | |
231 | */ | |
232 | ||
233 | #define START_OP \ | |
234 | start_pc = &bytecode->data[0]; \ | |
235 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; \ | |
236 | pc = next_pc) { \ | |
5a15f70c | 237 | dbg_printk("LTTng: Executing op %s (%u)\n", \ |
07dfc1d0 MD |
238 | lttng_filter_print_op((unsigned int) *(filter_opcode_t *) pc), \ |
239 | (unsigned int) *(filter_opcode_t *) pc); \ | |
240 | switch (*(filter_opcode_t *) pc) { | |
241 | ||
242 | #define OP(name) case name | |
243 | ||
244 | #define PO break | |
245 | ||
246 | #define END_OP } \ | |
247 | } | |
248 | ||
249 | #else | |
250 | ||
251 | /* | |
252 | * Dispatch-table based interpreter. | |
253 | */ | |
254 | ||
255 | #define START_OP \ | |
3834b99f | 256 | start_pc = &bytecode->code[0]; \ |
07dfc1d0 MD |
257 | pc = next_pc = start_pc; \ |
258 | if (unlikely(pc - start_pc >= bytecode->len)) \ | |
259 | goto end; \ | |
260 | goto *dispatch[*(filter_opcode_t *) pc]; | |
261 | ||
262 | #define OP(name) \ | |
263 | LABEL_##name | |
264 | ||
265 | #define PO \ | |
266 | pc = next_pc; \ | |
267 | goto *dispatch[*(filter_opcode_t *) pc]; | |
268 | ||
269 | #define END_OP | |
270 | ||
271 | #endif | |
272 | ||
3834b99f MD |
273 | static int context_get_index(struct lttng_probe_ctx *lttng_probe_ctx, |
274 | struct load_ptr *ptr, | |
275 | uint32_t idx) | |
276 | { | |
277 | ||
278 | struct lttng_ctx_field *ctx_field; | |
279 | struct lttng_event_field *field; | |
280 | union lttng_ctx_value v; | |
281 | ||
282 | ctx_field = <tng_static_ctx->fields[idx]; | |
283 | field = &ctx_field->event_field; | |
284 | ptr->type = LOAD_OBJECT; | |
285 | /* field is only used for types nested within variants. */ | |
286 | ptr->field = NULL; | |
287 | ||
288 | switch (field->type.atype) { | |
289 | case atype_integer: | |
290 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
ceabb767 | 291 | if (field->type.u.integer.signedness) { |
3834b99f MD |
292 | ptr->object_type = OBJECT_TYPE_S64; |
293 | ptr->u.s64 = v.s64; | |
294 | ptr->ptr = &ptr->u.s64; | |
295 | } else { | |
296 | ptr->object_type = OBJECT_TYPE_U64; | |
297 | ptr->u.u64 = v.s64; /* Cast. */ | |
298 | ptr->ptr = &ptr->u.u64; | |
299 | } | |
300 | break; | |
ceabb767 | 301 | case atype_enum_nestable: |
3834b99f MD |
302 | { |
303 | const struct lttng_integer_type *itype = | |
ceabb767 | 304 | &field->type.u.enum_nestable.container_type->u.integer; |
3834b99f MD |
305 | |
306 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
307 | if (itype->signedness) { | |
308 | ptr->object_type = OBJECT_TYPE_S64; | |
309 | ptr->u.s64 = v.s64; | |
310 | ptr->ptr = &ptr->u.s64; | |
311 | } else { | |
312 | ptr->object_type = OBJECT_TYPE_U64; | |
313 | ptr->u.u64 = v.s64; /* Cast. */ | |
314 | ptr->ptr = &ptr->u.u64; | |
315 | } | |
316 | break; | |
317 | } | |
ceabb767 MD |
318 | case atype_array_nestable: |
319 | if (!lttng_is_bytewise_integer(field->type.u.array_nestable.elem_type)) { | |
5a15f70c | 320 | printk(KERN_WARNING "LTTng: filter: Array nesting only supports integer types.\n"); |
3834b99f MD |
321 | return -EINVAL; |
322 | } | |
ceabb767 | 323 | if (field->type.u.array_nestable.elem_type->u.integer.encoding == lttng_encode_none) { |
5a15f70c | 324 | printk(KERN_WARNING "LTTng: filter: Only string arrays are supported for contexts.\n"); |
3834b99f MD |
325 | return -EINVAL; |
326 | } | |
327 | ptr->object_type = OBJECT_TYPE_STRING; | |
328 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
329 | ptr->ptr = v.str; | |
330 | break; | |
ceabb767 MD |
331 | case atype_sequence_nestable: |
332 | if (!lttng_is_bytewise_integer(field->type.u.sequence_nestable.elem_type)) { | |
5a15f70c | 333 | printk(KERN_WARNING "LTTng: filter: Sequence nesting only supports integer types.\n"); |
3834b99f MD |
334 | return -EINVAL; |
335 | } | |
ceabb767 | 336 | if (field->type.u.sequence_nestable.elem_type->u.integer.encoding == lttng_encode_none) { |
5a15f70c | 337 | printk(KERN_WARNING "LTTng: filter: Only string sequences are supported for contexts.\n"); |
3834b99f MD |
338 | return -EINVAL; |
339 | } | |
340 | ptr->object_type = OBJECT_TYPE_STRING; | |
341 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
342 | ptr->ptr = v.str; | |
343 | break; | |
3834b99f MD |
344 | case atype_string: |
345 | ptr->object_type = OBJECT_TYPE_STRING; | |
346 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
347 | ptr->ptr = v.str; | |
348 | break; | |
ceabb767 | 349 | case atype_struct_nestable: |
5a15f70c | 350 | printk(KERN_WARNING "LTTng: filter: Structure type cannot be loaded.\n"); |
3834b99f | 351 | return -EINVAL; |
ceabb767 | 352 | case atype_variant_nestable: |
5a15f70c | 353 | printk(KERN_WARNING "LTTng: filter: Variant type cannot be loaded.\n"); |
ceabb767 | 354 | return -EINVAL; |
3834b99f | 355 | default: |
5a15f70c | 356 | printk(KERN_WARNING "LTTng: filter: Unknown type: %d", (int) field->type.atype); |
3834b99f MD |
357 | return -EINVAL; |
358 | } | |
359 | return 0; | |
360 | } | |
361 | ||
362 | static int dynamic_get_index(struct lttng_probe_ctx *lttng_probe_ctx, | |
363 | struct bytecode_runtime *runtime, | |
364 | uint64_t index, struct estack_entry *stack_top) | |
365 | { | |
366 | int ret; | |
367 | const struct filter_get_index_data *gid; | |
368 | ||
369 | /* | |
370 | * Types nested within variants need to perform dynamic lookup | |
371 | * based on the field descriptions. LTTng-UST does not implement | |
372 | * variants for now. | |
373 | */ | |
374 | if (stack_top->u.ptr.field) | |
375 | return -EINVAL; | |
376 | gid = (const struct filter_get_index_data *) &runtime->data[index]; | |
377 | switch (stack_top->u.ptr.type) { | |
378 | case LOAD_OBJECT: | |
379 | switch (stack_top->u.ptr.object_type) { | |
380 | case OBJECT_TYPE_ARRAY: | |
381 | { | |
382 | const char *ptr; | |
383 | ||
384 | WARN_ON_ONCE(gid->offset >= gid->array_len); | |
385 | /* Skip count (unsigned long) */ | |
386 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
387 | ptr = ptr + gid->offset; | |
388 | stack_top->u.ptr.ptr = ptr; | |
389 | stack_top->u.ptr.object_type = gid->elem.type; | |
390 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
391 | /* field is only used for types nested within variants. */ | |
392 | stack_top->u.ptr.field = NULL; | |
393 | break; | |
394 | } | |
395 | case OBJECT_TYPE_SEQUENCE: | |
396 | { | |
397 | const char *ptr; | |
398 | size_t ptr_seq_len; | |
399 | ||
400 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
401 | ptr_seq_len = *(unsigned long *) stack_top->u.ptr.ptr; | |
402 | if (gid->offset >= gid->elem.len * ptr_seq_len) { | |
403 | ret = -EINVAL; | |
404 | goto end; | |
405 | } | |
406 | ptr = ptr + gid->offset; | |
407 | stack_top->u.ptr.ptr = ptr; | |
408 | stack_top->u.ptr.object_type = gid->elem.type; | |
409 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
410 | /* field is only used for types nested within variants. */ | |
411 | stack_top->u.ptr.field = NULL; | |
412 | break; | |
413 | } | |
414 | case OBJECT_TYPE_STRUCT: | |
5a15f70c | 415 | printk(KERN_WARNING "LTTng: filter: Nested structures are not supported yet.\n"); |
3834b99f MD |
416 | ret = -EINVAL; |
417 | goto end; | |
418 | case OBJECT_TYPE_VARIANT: | |
419 | default: | |
5a15f70c | 420 | printk(KERN_WARNING "LTTng: filter: Unexpected get index type %d", |
3834b99f MD |
421 | (int) stack_top->u.ptr.object_type); |
422 | ret = -EINVAL; | |
423 | goto end; | |
424 | } | |
425 | break; | |
426 | case LOAD_ROOT_CONTEXT: | |
427 | case LOAD_ROOT_APP_CONTEXT: /* Fall-through */ | |
428 | { | |
429 | ret = context_get_index(lttng_probe_ctx, | |
430 | &stack_top->u.ptr, | |
431 | gid->ctx_index); | |
432 | if (ret) { | |
433 | goto end; | |
434 | } | |
435 | break; | |
436 | } | |
437 | case LOAD_ROOT_PAYLOAD: | |
438 | stack_top->u.ptr.ptr += gid->offset; | |
439 | if (gid->elem.type == OBJECT_TYPE_STRING) | |
440 | stack_top->u.ptr.ptr = *(const char * const *) stack_top->u.ptr.ptr; | |
441 | stack_top->u.ptr.object_type = gid->elem.type; | |
442 | stack_top->u.ptr.type = LOAD_OBJECT; | |
443 | /* field is only used for types nested within variants. */ | |
444 | stack_top->u.ptr.field = NULL; | |
445 | break; | |
446 | } | |
447 | return 0; | |
448 | ||
449 | end: | |
450 | return ret; | |
451 | } | |
452 | ||
453 | static int dynamic_load_field(struct estack_entry *stack_top) | |
454 | { | |
455 | int ret; | |
456 | ||
457 | switch (stack_top->u.ptr.type) { | |
458 | case LOAD_OBJECT: | |
459 | break; | |
460 | case LOAD_ROOT_CONTEXT: | |
461 | case LOAD_ROOT_APP_CONTEXT: | |
462 | case LOAD_ROOT_PAYLOAD: | |
463 | default: | |
464 | dbg_printk("Filter warning: cannot load root, missing field name.\n"); | |
465 | ret = -EINVAL; | |
466 | goto end; | |
467 | } | |
468 | switch (stack_top->u.ptr.object_type) { | |
469 | case OBJECT_TYPE_S8: | |
470 | dbg_printk("op load field s8\n"); | |
471 | stack_top->u.v = *(int8_t *) stack_top->u.ptr.ptr; | |
472 | break; | |
473 | case OBJECT_TYPE_S16: | |
474 | { | |
475 | int16_t tmp; | |
476 | ||
477 | dbg_printk("op load field s16\n"); | |
478 | tmp = *(int16_t *) stack_top->u.ptr.ptr; | |
479 | if (stack_top->u.ptr.rev_bo) | |
480 | __swab16s(&tmp); | |
481 | stack_top->u.v = tmp; | |
482 | break; | |
483 | } | |
484 | case OBJECT_TYPE_S32: | |
485 | { | |
486 | int32_t tmp; | |
487 | ||
488 | dbg_printk("op load field s32\n"); | |
489 | tmp = *(int32_t *) stack_top->u.ptr.ptr; | |
490 | if (stack_top->u.ptr.rev_bo) | |
491 | __swab32s(&tmp); | |
492 | stack_top->u.v = tmp; | |
493 | break; | |
494 | } | |
495 | case OBJECT_TYPE_S64: | |
496 | { | |
497 | int64_t tmp; | |
498 | ||
499 | dbg_printk("op load field s64\n"); | |
500 | tmp = *(int64_t *) stack_top->u.ptr.ptr; | |
501 | if (stack_top->u.ptr.rev_bo) | |
502 | __swab64s(&tmp); | |
503 | stack_top->u.v = tmp; | |
504 | break; | |
505 | } | |
506 | case OBJECT_TYPE_U8: | |
507 | dbg_printk("op load field u8\n"); | |
508 | stack_top->u.v = *(uint8_t *) stack_top->u.ptr.ptr; | |
509 | break; | |
510 | case OBJECT_TYPE_U16: | |
511 | { | |
512 | uint16_t tmp; | |
513 | ||
5fae98f7 | 514 | dbg_printk("op load field u16\n"); |
3834b99f MD |
515 | tmp = *(uint16_t *) stack_top->u.ptr.ptr; |
516 | if (stack_top->u.ptr.rev_bo) | |
517 | __swab16s(&tmp); | |
518 | stack_top->u.v = tmp; | |
519 | break; | |
520 | } | |
521 | case OBJECT_TYPE_U32: | |
522 | { | |
523 | uint32_t tmp; | |
524 | ||
525 | dbg_printk("op load field u32\n"); | |
526 | tmp = *(uint32_t *) stack_top->u.ptr.ptr; | |
527 | if (stack_top->u.ptr.rev_bo) | |
528 | __swab32s(&tmp); | |
529 | stack_top->u.v = tmp; | |
530 | break; | |
531 | } | |
532 | case OBJECT_TYPE_U64: | |
533 | { | |
534 | uint64_t tmp; | |
535 | ||
536 | dbg_printk("op load field u64\n"); | |
537 | tmp = *(uint64_t *) stack_top->u.ptr.ptr; | |
538 | if (stack_top->u.ptr.rev_bo) | |
539 | __swab64s(&tmp); | |
540 | stack_top->u.v = tmp; | |
541 | break; | |
542 | } | |
543 | case OBJECT_TYPE_STRING: | |
544 | { | |
545 | const char *str; | |
546 | ||
547 | dbg_printk("op load field string\n"); | |
548 | str = (const char *) stack_top->u.ptr.ptr; | |
549 | stack_top->u.s.str = str; | |
550 | if (unlikely(!stack_top->u.s.str)) { | |
551 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
552 | ret = -EINVAL; | |
553 | goto end; | |
554 | } | |
4efe037b | 555 | stack_top->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
556 | stack_top->u.s.literal_type = |
557 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
558 | break; | |
559 | } | |
560 | case OBJECT_TYPE_STRING_SEQUENCE: | |
561 | { | |
562 | const char *ptr; | |
563 | ||
564 | dbg_printk("op load field string sequence\n"); | |
565 | ptr = stack_top->u.ptr.ptr; | |
566 | stack_top->u.s.seq_len = *(unsigned long *) ptr; | |
567 | stack_top->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
568 | if (unlikely(!stack_top->u.s.str)) { | |
569 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
570 | ret = -EINVAL; | |
571 | goto end; | |
572 | } | |
573 | stack_top->u.s.literal_type = | |
574 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
575 | break; | |
576 | } | |
577 | case OBJECT_TYPE_DYNAMIC: | |
578 | /* | |
579 | * Dynamic types in context are looked up | |
580 | * by context get index. | |
581 | */ | |
582 | ret = -EINVAL; | |
583 | goto end; | |
584 | case OBJECT_TYPE_DOUBLE: | |
585 | ret = -EINVAL; | |
586 | goto end; | |
587 | case OBJECT_TYPE_SEQUENCE: | |
588 | case OBJECT_TYPE_ARRAY: | |
589 | case OBJECT_TYPE_STRUCT: | |
590 | case OBJECT_TYPE_VARIANT: | |
5a15f70c | 591 | printk(KERN_WARNING "LTTng: filter: Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); |
3834b99f MD |
592 | ret = -EINVAL; |
593 | goto end; | |
594 | } | |
595 | return 0; | |
596 | ||
597 | end: | |
598 | return ret; | |
599 | } | |
600 | ||
07dfc1d0 MD |
601 | /* |
602 | * Return 0 (discard), or raise the 0x1 flag (log event). | |
603 | * Currently, other flags are kept for future extensions and have no | |
604 | * effect. | |
605 | */ | |
606 | uint64_t lttng_filter_interpret_bytecode(void *filter_data, | |
79150a49 | 607 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 MD |
608 | const char *filter_stack_data) |
609 | { | |
610 | struct bytecode_runtime *bytecode = filter_data; | |
611 | void *pc, *next_pc, *start_pc; | |
612 | int ret = -EINVAL; | |
613 | uint64_t retval = 0; | |
614 | struct estack _stack; | |
615 | struct estack *stack = &_stack; | |
616 | register int64_t ax = 0, bx = 0; | |
617 | register int top = FILTER_STACK_EMPTY; | |
618 | #ifndef INTERPRETER_USE_SWITCH | |
619 | static void *dispatch[NR_FILTER_OPS] = { | |
620 | [ FILTER_OP_UNKNOWN ] = &&LABEL_FILTER_OP_UNKNOWN, | |
621 | ||
622 | [ FILTER_OP_RETURN ] = &&LABEL_FILTER_OP_RETURN, | |
623 | ||
624 | /* binary */ | |
625 | [ FILTER_OP_MUL ] = &&LABEL_FILTER_OP_MUL, | |
626 | [ FILTER_OP_DIV ] = &&LABEL_FILTER_OP_DIV, | |
627 | [ FILTER_OP_MOD ] = &&LABEL_FILTER_OP_MOD, | |
628 | [ FILTER_OP_PLUS ] = &&LABEL_FILTER_OP_PLUS, | |
629 | [ FILTER_OP_MINUS ] = &&LABEL_FILTER_OP_MINUS, | |
e16c054b MD |
630 | [ FILTER_OP_BIT_RSHIFT ] = &&LABEL_FILTER_OP_BIT_RSHIFT, |
631 | [ FILTER_OP_BIT_LSHIFT ] = &&LABEL_FILTER_OP_BIT_LSHIFT, | |
3834b99f MD |
632 | [ FILTER_OP_BIT_AND ] = &&LABEL_FILTER_OP_BIT_AND, |
633 | [ FILTER_OP_BIT_OR ] = &&LABEL_FILTER_OP_BIT_OR, | |
634 | [ FILTER_OP_BIT_XOR ] = &&LABEL_FILTER_OP_BIT_XOR, | |
07dfc1d0 MD |
635 | |
636 | /* binary comparators */ | |
637 | [ FILTER_OP_EQ ] = &&LABEL_FILTER_OP_EQ, | |
638 | [ FILTER_OP_NE ] = &&LABEL_FILTER_OP_NE, | |
639 | [ FILTER_OP_GT ] = &&LABEL_FILTER_OP_GT, | |
640 | [ FILTER_OP_LT ] = &&LABEL_FILTER_OP_LT, | |
641 | [ FILTER_OP_GE ] = &&LABEL_FILTER_OP_GE, | |
642 | [ FILTER_OP_LE ] = &&LABEL_FILTER_OP_LE, | |
643 | ||
644 | /* string binary comparator */ | |
645 | [ FILTER_OP_EQ_STRING ] = &&LABEL_FILTER_OP_EQ_STRING, | |
646 | [ FILTER_OP_NE_STRING ] = &&LABEL_FILTER_OP_NE_STRING, | |
647 | [ FILTER_OP_GT_STRING ] = &&LABEL_FILTER_OP_GT_STRING, | |
648 | [ FILTER_OP_LT_STRING ] = &&LABEL_FILTER_OP_LT_STRING, | |
649 | [ FILTER_OP_GE_STRING ] = &&LABEL_FILTER_OP_GE_STRING, | |
650 | [ FILTER_OP_LE_STRING ] = &&LABEL_FILTER_OP_LE_STRING, | |
651 | ||
02aca193 PP |
652 | /* globbing pattern binary comparator */ |
653 | [ FILTER_OP_EQ_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_EQ_STAR_GLOB_STRING, | |
654 | [ FILTER_OP_NE_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_NE_STAR_GLOB_STRING, | |
655 | ||
07dfc1d0 MD |
656 | /* s64 binary comparator */ |
657 | [ FILTER_OP_EQ_S64 ] = &&LABEL_FILTER_OP_EQ_S64, | |
658 | [ FILTER_OP_NE_S64 ] = &&LABEL_FILTER_OP_NE_S64, | |
659 | [ FILTER_OP_GT_S64 ] = &&LABEL_FILTER_OP_GT_S64, | |
660 | [ FILTER_OP_LT_S64 ] = &&LABEL_FILTER_OP_LT_S64, | |
661 | [ FILTER_OP_GE_S64 ] = &&LABEL_FILTER_OP_GE_S64, | |
662 | [ FILTER_OP_LE_S64 ] = &&LABEL_FILTER_OP_LE_S64, | |
663 | ||
664 | /* double binary comparator */ | |
665 | [ FILTER_OP_EQ_DOUBLE ] = &&LABEL_FILTER_OP_EQ_DOUBLE, | |
666 | [ FILTER_OP_NE_DOUBLE ] = &&LABEL_FILTER_OP_NE_DOUBLE, | |
667 | [ FILTER_OP_GT_DOUBLE ] = &&LABEL_FILTER_OP_GT_DOUBLE, | |
668 | [ FILTER_OP_LT_DOUBLE ] = &&LABEL_FILTER_OP_LT_DOUBLE, | |
669 | [ FILTER_OP_GE_DOUBLE ] = &&LABEL_FILTER_OP_GE_DOUBLE, | |
670 | [ FILTER_OP_LE_DOUBLE ] = &&LABEL_FILTER_OP_LE_DOUBLE, | |
671 | ||
672 | /* Mixed S64-double binary comparators */ | |
673 | [ FILTER_OP_EQ_DOUBLE_S64 ] = &&LABEL_FILTER_OP_EQ_DOUBLE_S64, | |
674 | [ FILTER_OP_NE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_NE_DOUBLE_S64, | |
675 | [ FILTER_OP_GT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GT_DOUBLE_S64, | |
676 | [ FILTER_OP_LT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LT_DOUBLE_S64, | |
677 | [ FILTER_OP_GE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GE_DOUBLE_S64, | |
678 | [ FILTER_OP_LE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LE_DOUBLE_S64, | |
679 | ||
680 | [ FILTER_OP_EQ_S64_DOUBLE ] = &&LABEL_FILTER_OP_EQ_S64_DOUBLE, | |
681 | [ FILTER_OP_NE_S64_DOUBLE ] = &&LABEL_FILTER_OP_NE_S64_DOUBLE, | |
682 | [ FILTER_OP_GT_S64_DOUBLE ] = &&LABEL_FILTER_OP_GT_S64_DOUBLE, | |
683 | [ FILTER_OP_LT_S64_DOUBLE ] = &&LABEL_FILTER_OP_LT_S64_DOUBLE, | |
684 | [ FILTER_OP_GE_S64_DOUBLE ] = &&LABEL_FILTER_OP_GE_S64_DOUBLE, | |
685 | [ FILTER_OP_LE_S64_DOUBLE ] = &&LABEL_FILTER_OP_LE_S64_DOUBLE, | |
686 | ||
687 | /* unary */ | |
688 | [ FILTER_OP_UNARY_PLUS ] = &&LABEL_FILTER_OP_UNARY_PLUS, | |
689 | [ FILTER_OP_UNARY_MINUS ] = &&LABEL_FILTER_OP_UNARY_MINUS, | |
690 | [ FILTER_OP_UNARY_NOT ] = &&LABEL_FILTER_OP_UNARY_NOT, | |
691 | [ FILTER_OP_UNARY_PLUS_S64 ] = &&LABEL_FILTER_OP_UNARY_PLUS_S64, | |
692 | [ FILTER_OP_UNARY_MINUS_S64 ] = &&LABEL_FILTER_OP_UNARY_MINUS_S64, | |
693 | [ FILTER_OP_UNARY_NOT_S64 ] = &&LABEL_FILTER_OP_UNARY_NOT_S64, | |
694 | [ FILTER_OP_UNARY_PLUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_PLUS_DOUBLE, | |
695 | [ FILTER_OP_UNARY_MINUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_MINUS_DOUBLE, | |
696 | [ FILTER_OP_UNARY_NOT_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_NOT_DOUBLE, | |
697 | ||
698 | /* logical */ | |
699 | [ FILTER_OP_AND ] = &&LABEL_FILTER_OP_AND, | |
700 | [ FILTER_OP_OR ] = &&LABEL_FILTER_OP_OR, | |
701 | ||
702 | /* load field ref */ | |
703 | [ FILTER_OP_LOAD_FIELD_REF ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF, | |
704 | [ FILTER_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_STRING, | |
705 | [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_SEQUENCE, | |
706 | [ FILTER_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_S64, | |
707 | [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_DOUBLE, | |
708 | ||
709 | /* load from immediate operand */ | |
710 | [ FILTER_OP_LOAD_STRING ] = &&LABEL_FILTER_OP_LOAD_STRING, | |
02aca193 | 711 | [ FILTER_OP_LOAD_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_LOAD_STAR_GLOB_STRING, |
07dfc1d0 MD |
712 | [ FILTER_OP_LOAD_S64 ] = &&LABEL_FILTER_OP_LOAD_S64, |
713 | [ FILTER_OP_LOAD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_DOUBLE, | |
714 | ||
715 | /* cast */ | |
716 | [ FILTER_OP_CAST_TO_S64 ] = &&LABEL_FILTER_OP_CAST_TO_S64, | |
717 | [ FILTER_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_FILTER_OP_CAST_DOUBLE_TO_S64, | |
718 | [ FILTER_OP_CAST_NOP ] = &&LABEL_FILTER_OP_CAST_NOP, | |
719 | ||
720 | /* get context ref */ | |
721 | [ FILTER_OP_GET_CONTEXT_REF ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF, | |
722 | [ FILTER_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_STRING, | |
723 | [ FILTER_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_S64, | |
724 | [ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_DOUBLE, | |
f127e61e MD |
725 | |
726 | /* load userspace field ref */ | |
727 | [ FILTER_OP_LOAD_FIELD_REF_USER_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_STRING, | |
728 | [ FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE, | |
3834b99f MD |
729 | |
730 | /* Instructions for recursive traversal through composed types. */ | |
731 | [ FILTER_OP_GET_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_CONTEXT_ROOT, | |
732 | [ FILTER_OP_GET_APP_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_APP_CONTEXT_ROOT, | |
733 | [ FILTER_OP_GET_PAYLOAD_ROOT ] = &&LABEL_FILTER_OP_GET_PAYLOAD_ROOT, | |
734 | ||
735 | [ FILTER_OP_GET_SYMBOL ] = &&LABEL_FILTER_OP_GET_SYMBOL, | |
736 | [ FILTER_OP_GET_SYMBOL_FIELD ] = &&LABEL_FILTER_OP_GET_SYMBOL_FIELD, | |
737 | [ FILTER_OP_GET_INDEX_U16 ] = &&LABEL_FILTER_OP_GET_INDEX_U16, | |
738 | [ FILTER_OP_GET_INDEX_U64 ] = &&LABEL_FILTER_OP_GET_INDEX_U64, | |
739 | ||
740 | [ FILTER_OP_LOAD_FIELD ] = &&LABEL_FILTER_OP_LOAD_FIELD, | |
741 | [ FILTER_OP_LOAD_FIELD_S8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S8, | |
742 | [ FILTER_OP_LOAD_FIELD_S16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S16, | |
743 | [ FILTER_OP_LOAD_FIELD_S32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S32, | |
744 | [ FILTER_OP_LOAD_FIELD_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S64, | |
745 | [ FILTER_OP_LOAD_FIELD_U8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U8, | |
746 | [ FILTER_OP_LOAD_FIELD_U16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U16, | |
747 | [ FILTER_OP_LOAD_FIELD_U32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U32, | |
748 | [ FILTER_OP_LOAD_FIELD_U64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U64, | |
749 | [ FILTER_OP_LOAD_FIELD_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_STRING, | |
750 | [ FILTER_OP_LOAD_FIELD_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_SEQUENCE, | |
751 | [ FILTER_OP_LOAD_FIELD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_DOUBLE, | |
e16c054b MD |
752 | |
753 | [ FILTER_OP_UNARY_BIT_NOT ] = &&LABEL_FILTER_OP_UNARY_BIT_NOT, | |
57ba4b41 MD |
754 | |
755 | [ FILTER_OP_RETURN_S64 ] = &&LABEL_FILTER_OP_RETURN_S64, | |
07dfc1d0 MD |
756 | }; |
757 | #endif /* #ifndef INTERPRETER_USE_SWITCH */ | |
758 | ||
759 | START_OP | |
760 | ||
761 | OP(FILTER_OP_UNKNOWN): | |
762 | OP(FILTER_OP_LOAD_FIELD_REF): | |
763 | OP(FILTER_OP_GET_CONTEXT_REF): | |
764 | #ifdef INTERPRETER_USE_SWITCH | |
765 | default: | |
766 | #endif /* INTERPRETER_USE_SWITCH */ | |
5a15f70c | 767 | printk(KERN_WARNING "LTTng: filter: unknown bytecode op %u\n", |
07dfc1d0 MD |
768 | (unsigned int) *(filter_opcode_t *) pc); |
769 | ret = -EINVAL; | |
770 | goto end; | |
771 | ||
772 | OP(FILTER_OP_RETURN): | |
57ba4b41 | 773 | OP(FILTER_OP_RETURN_S64): |
a93d4e71 | 774 | /* LTTNG_FILTER_DISCARD or LTTNG_FILTER_RECORD_FLAG */ |
07dfc1d0 MD |
775 | retval = !!estack_ax_v; |
776 | ret = 0; | |
777 | goto end; | |
778 | ||
779 | /* binary */ | |
780 | OP(FILTER_OP_MUL): | |
781 | OP(FILTER_OP_DIV): | |
782 | OP(FILTER_OP_MOD): | |
783 | OP(FILTER_OP_PLUS): | |
784 | OP(FILTER_OP_MINUS): | |
5a15f70c | 785 | printk(KERN_WARNING "LTTng: filter: unsupported bytecode op %u\n", |
07dfc1d0 MD |
786 | (unsigned int) *(filter_opcode_t *) pc); |
787 | ret = -EINVAL; | |
788 | goto end; | |
789 | ||
790 | OP(FILTER_OP_EQ): | |
791 | OP(FILTER_OP_NE): | |
792 | OP(FILTER_OP_GT): | |
793 | OP(FILTER_OP_LT): | |
794 | OP(FILTER_OP_GE): | |
795 | OP(FILTER_OP_LE): | |
5a15f70c | 796 | printk(KERN_WARNING "LTTng: filter: unsupported non-specialized bytecode op %u\n", |
07dfc1d0 MD |
797 | (unsigned int) *(filter_opcode_t *) pc); |
798 | ret = -EINVAL; | |
799 | goto end; | |
800 | ||
801 | OP(FILTER_OP_EQ_STRING): | |
802 | { | |
803 | int res; | |
804 | ||
805 | res = (stack_strcmp(stack, top, "==") == 0); | |
806 | estack_pop(stack, top, ax, bx); | |
807 | estack_ax_v = res; | |
808 | next_pc += sizeof(struct binary_op); | |
809 | PO; | |
810 | } | |
811 | OP(FILTER_OP_NE_STRING): | |
812 | { | |
813 | int res; | |
814 | ||
815 | res = (stack_strcmp(stack, top, "!=") != 0); | |
816 | estack_pop(stack, top, ax, bx); | |
817 | estack_ax_v = res; | |
818 | next_pc += sizeof(struct binary_op); | |
819 | PO; | |
820 | } | |
821 | OP(FILTER_OP_GT_STRING): | |
822 | { | |
823 | int res; | |
824 | ||
825 | res = (stack_strcmp(stack, top, ">") > 0); | |
826 | estack_pop(stack, top, ax, bx); | |
827 | estack_ax_v = res; | |
828 | next_pc += sizeof(struct binary_op); | |
829 | PO; | |
830 | } | |
831 | OP(FILTER_OP_LT_STRING): | |
832 | { | |
833 | int res; | |
834 | ||
835 | res = (stack_strcmp(stack, top, "<") < 0); | |
836 | estack_pop(stack, top, ax, bx); | |
837 | estack_ax_v = res; | |
838 | next_pc += sizeof(struct binary_op); | |
839 | PO; | |
840 | } | |
841 | OP(FILTER_OP_GE_STRING): | |
842 | { | |
843 | int res; | |
844 | ||
845 | res = (stack_strcmp(stack, top, ">=") >= 0); | |
846 | estack_pop(stack, top, ax, bx); | |
847 | estack_ax_v = res; | |
848 | next_pc += sizeof(struct binary_op); | |
849 | PO; | |
850 | } | |
851 | OP(FILTER_OP_LE_STRING): | |
852 | { | |
853 | int res; | |
854 | ||
855 | res = (stack_strcmp(stack, top, "<=") <= 0); | |
856 | estack_pop(stack, top, ax, bx); | |
857 | estack_ax_v = res; | |
858 | next_pc += sizeof(struct binary_op); | |
859 | PO; | |
860 | } | |
861 | ||
02aca193 PP |
862 | OP(FILTER_OP_EQ_STAR_GLOB_STRING): |
863 | { | |
864 | int res; | |
865 | ||
866 | res = (stack_star_glob_match(stack, top, "==") == 0); | |
867 | estack_pop(stack, top, ax, bx); | |
868 | estack_ax_v = res; | |
869 | next_pc += sizeof(struct binary_op); | |
870 | PO; | |
871 | } | |
872 | OP(FILTER_OP_NE_STAR_GLOB_STRING): | |
873 | { | |
874 | int res; | |
875 | ||
876 | res = (stack_star_glob_match(stack, top, "!=") != 0); | |
877 | estack_pop(stack, top, ax, bx); | |
878 | estack_ax_v = res; | |
879 | next_pc += sizeof(struct binary_op); | |
880 | PO; | |
881 | } | |
882 | ||
07dfc1d0 MD |
883 | OP(FILTER_OP_EQ_S64): |
884 | { | |
885 | int res; | |
886 | ||
887 | res = (estack_bx_v == estack_ax_v); | |
888 | estack_pop(stack, top, ax, bx); | |
889 | estack_ax_v = res; | |
890 | next_pc += sizeof(struct binary_op); | |
891 | PO; | |
892 | } | |
893 | OP(FILTER_OP_NE_S64): | |
894 | { | |
895 | int res; | |
896 | ||
897 | res = (estack_bx_v != estack_ax_v); | |
898 | estack_pop(stack, top, ax, bx); | |
899 | estack_ax_v = res; | |
900 | next_pc += sizeof(struct binary_op); | |
901 | PO; | |
902 | } | |
903 | OP(FILTER_OP_GT_S64): | |
904 | { | |
905 | int res; | |
906 | ||
907 | res = (estack_bx_v > estack_ax_v); | |
908 | estack_pop(stack, top, ax, bx); | |
909 | estack_ax_v = res; | |
910 | next_pc += sizeof(struct binary_op); | |
911 | PO; | |
912 | } | |
913 | OP(FILTER_OP_LT_S64): | |
914 | { | |
915 | int res; | |
916 | ||
917 | res = (estack_bx_v < estack_ax_v); | |
918 | estack_pop(stack, top, ax, bx); | |
919 | estack_ax_v = res; | |
920 | next_pc += sizeof(struct binary_op); | |
921 | PO; | |
922 | } | |
923 | OP(FILTER_OP_GE_S64): | |
924 | { | |
925 | int res; | |
926 | ||
927 | res = (estack_bx_v >= estack_ax_v); | |
928 | estack_pop(stack, top, ax, bx); | |
929 | estack_ax_v = res; | |
930 | next_pc += sizeof(struct binary_op); | |
931 | PO; | |
932 | } | |
933 | OP(FILTER_OP_LE_S64): | |
934 | { | |
935 | int res; | |
936 | ||
937 | res = (estack_bx_v <= estack_ax_v); | |
938 | estack_pop(stack, top, ax, bx); | |
939 | estack_ax_v = res; | |
940 | next_pc += sizeof(struct binary_op); | |
941 | PO; | |
942 | } | |
943 | ||
944 | OP(FILTER_OP_EQ_DOUBLE): | |
945 | OP(FILTER_OP_NE_DOUBLE): | |
946 | OP(FILTER_OP_GT_DOUBLE): | |
947 | OP(FILTER_OP_LT_DOUBLE): | |
948 | OP(FILTER_OP_GE_DOUBLE): | |
949 | OP(FILTER_OP_LE_DOUBLE): | |
950 | { | |
951 | BUG_ON(1); | |
952 | PO; | |
953 | } | |
954 | ||
955 | /* Mixed S64-double binary comparators */ | |
956 | OP(FILTER_OP_EQ_DOUBLE_S64): | |
957 | OP(FILTER_OP_NE_DOUBLE_S64): | |
958 | OP(FILTER_OP_GT_DOUBLE_S64): | |
959 | OP(FILTER_OP_LT_DOUBLE_S64): | |
960 | OP(FILTER_OP_GE_DOUBLE_S64): | |
961 | OP(FILTER_OP_LE_DOUBLE_S64): | |
962 | OP(FILTER_OP_EQ_S64_DOUBLE): | |
963 | OP(FILTER_OP_NE_S64_DOUBLE): | |
964 | OP(FILTER_OP_GT_S64_DOUBLE): | |
965 | OP(FILTER_OP_LT_S64_DOUBLE): | |
966 | OP(FILTER_OP_GE_S64_DOUBLE): | |
967 | OP(FILTER_OP_LE_S64_DOUBLE): | |
968 | { | |
969 | BUG_ON(1); | |
970 | PO; | |
971 | } | |
e16c054b MD |
972 | OP(FILTER_OP_BIT_RSHIFT): |
973 | { | |
974 | int64_t res; | |
975 | ||
ea13ec96 MD |
976 | /* Catch undefined behavior. */ |
977 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
978 | ret = -EINVAL; | |
979 | goto end; | |
980 | } | |
f8d42740 | 981 | res = ((uint64_t) estack_bx_v >> (uint32_t) estack_ax_v); |
e16c054b MD |
982 | estack_pop(stack, top, ax, bx); |
983 | estack_ax_v = res; | |
984 | next_pc += sizeof(struct binary_op); | |
985 | PO; | |
986 | } | |
987 | OP(FILTER_OP_BIT_LSHIFT): | |
988 | { | |
989 | int64_t res; | |
990 | ||
ea13ec96 MD |
991 | /* Catch undefined behavior. */ |
992 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
993 | ret = -EINVAL; | |
994 | goto end; | |
995 | } | |
f8d42740 | 996 | res = ((uint64_t) estack_bx_v << (uint32_t) estack_ax_v); |
e16c054b MD |
997 | estack_pop(stack, top, ax, bx); |
998 | estack_ax_v = res; | |
999 | next_pc += sizeof(struct binary_op); | |
1000 | PO; | |
1001 | } | |
3834b99f MD |
1002 | OP(FILTER_OP_BIT_AND): |
1003 | { | |
1004 | int64_t res; | |
1005 | ||
f8d42740 | 1006 | res = ((uint64_t) estack_bx_v & (uint64_t) estack_ax_v); |
3834b99f MD |
1007 | estack_pop(stack, top, ax, bx); |
1008 | estack_ax_v = res; | |
1009 | next_pc += sizeof(struct binary_op); | |
1010 | PO; | |
1011 | } | |
1012 | OP(FILTER_OP_BIT_OR): | |
1013 | { | |
1014 | int64_t res; | |
1015 | ||
f8d42740 | 1016 | res = ((uint64_t) estack_bx_v | (uint64_t) estack_ax_v); |
3834b99f MD |
1017 | estack_pop(stack, top, ax, bx); |
1018 | estack_ax_v = res; | |
1019 | next_pc += sizeof(struct binary_op); | |
1020 | PO; | |
1021 | } | |
1022 | OP(FILTER_OP_BIT_XOR): | |
1023 | { | |
1024 | int64_t res; | |
1025 | ||
f8d42740 | 1026 | res = ((uint64_t) estack_bx_v ^ (uint64_t) estack_ax_v); |
3834b99f MD |
1027 | estack_pop(stack, top, ax, bx); |
1028 | estack_ax_v = res; | |
1029 | next_pc += sizeof(struct binary_op); | |
1030 | PO; | |
1031 | } | |
07dfc1d0 MD |
1032 | |
1033 | /* unary */ | |
1034 | OP(FILTER_OP_UNARY_PLUS): | |
1035 | OP(FILTER_OP_UNARY_MINUS): | |
1036 | OP(FILTER_OP_UNARY_NOT): | |
5a15f70c | 1037 | printk(KERN_WARNING "LTTng: filter: unsupported non-specialized bytecode op %u\n", |
07dfc1d0 MD |
1038 | (unsigned int) *(filter_opcode_t *) pc); |
1039 | ret = -EINVAL; | |
1040 | goto end; | |
1041 | ||
1042 | ||
e16c054b MD |
1043 | OP(FILTER_OP_UNARY_BIT_NOT): |
1044 | { | |
f8d42740 | 1045 | estack_ax_v = ~(uint64_t) estack_ax_v; |
e16c054b MD |
1046 | next_pc += sizeof(struct unary_op); |
1047 | PO; | |
1048 | } | |
1049 | ||
07dfc1d0 MD |
1050 | OP(FILTER_OP_UNARY_PLUS_S64): |
1051 | { | |
1052 | next_pc += sizeof(struct unary_op); | |
1053 | PO; | |
1054 | } | |
1055 | OP(FILTER_OP_UNARY_MINUS_S64): | |
1056 | { | |
1057 | estack_ax_v = -estack_ax_v; | |
1058 | next_pc += sizeof(struct unary_op); | |
1059 | PO; | |
1060 | } | |
1061 | OP(FILTER_OP_UNARY_PLUS_DOUBLE): | |
1062 | OP(FILTER_OP_UNARY_MINUS_DOUBLE): | |
1063 | { | |
1064 | BUG_ON(1); | |
1065 | PO; | |
1066 | } | |
1067 | OP(FILTER_OP_UNARY_NOT_S64): | |
1068 | { | |
1069 | estack_ax_v = !estack_ax_v; | |
1070 | next_pc += sizeof(struct unary_op); | |
1071 | PO; | |
1072 | } | |
1073 | OP(FILTER_OP_UNARY_NOT_DOUBLE): | |
1074 | { | |
1075 | BUG_ON(1); | |
1076 | PO; | |
1077 | } | |
1078 | ||
1079 | /* logical */ | |
1080 | OP(FILTER_OP_AND): | |
1081 | { | |
1082 | struct logical_op *insn = (struct logical_op *) pc; | |
1083 | ||
1084 | /* If AX is 0, skip and evaluate to 0 */ | |
1085 | if (unlikely(estack_ax_v == 0)) { | |
1086 | dbg_printk("Jumping to bytecode offset %u\n", | |
1087 | (unsigned int) insn->skip_offset); | |
1088 | next_pc = start_pc + insn->skip_offset; | |
1089 | } else { | |
1090 | /* Pop 1 when jump not taken */ | |
1091 | estack_pop(stack, top, ax, bx); | |
1092 | next_pc += sizeof(struct logical_op); | |
1093 | } | |
1094 | PO; | |
1095 | } | |
1096 | OP(FILTER_OP_OR): | |
1097 | { | |
1098 | struct logical_op *insn = (struct logical_op *) pc; | |
1099 | ||
1100 | /* If AX is nonzero, skip and evaluate to 1 */ | |
1101 | ||
1102 | if (unlikely(estack_ax_v != 0)) { | |
1103 | estack_ax_v = 1; | |
1104 | dbg_printk("Jumping to bytecode offset %u\n", | |
1105 | (unsigned int) insn->skip_offset); | |
1106 | next_pc = start_pc + insn->skip_offset; | |
1107 | } else { | |
1108 | /* Pop 1 when jump not taken */ | |
1109 | estack_pop(stack, top, ax, bx); | |
1110 | next_pc += sizeof(struct logical_op); | |
1111 | } | |
1112 | PO; | |
1113 | } | |
1114 | ||
1115 | ||
1116 | /* load field ref */ | |
1117 | OP(FILTER_OP_LOAD_FIELD_REF_STRING): | |
1118 | { | |
1119 | struct load_op *insn = (struct load_op *) pc; | |
1120 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1121 | ||
1122 | dbg_printk("load field ref offset %u type string\n", | |
1123 | ref->offset); | |
1124 | estack_push(stack, top, ax, bx); | |
1125 | estack_ax(stack, top)->u.s.str = | |
1126 | *(const char * const *) &filter_stack_data[ref->offset]; | |
1127 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1128 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1129 | ret = -EINVAL; | |
1130 | goto end; | |
1131 | } | |
cbc19040 | 1132 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1133 | estack_ax(stack, top)->u.s.literal_type = |
1134 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1135 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1136 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
1137 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1138 | PO; | |
1139 | } | |
1140 | ||
1141 | OP(FILTER_OP_LOAD_FIELD_REF_SEQUENCE): | |
1142 | { | |
1143 | struct load_op *insn = (struct load_op *) pc; | |
1144 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1145 | ||
1146 | dbg_printk("load field ref offset %u type sequence\n", | |
1147 | ref->offset); | |
1148 | estack_push(stack, top, ax, bx); | |
1149 | estack_ax(stack, top)->u.s.seq_len = | |
1150 | *(unsigned long *) &filter_stack_data[ref->offset]; | |
1151 | estack_ax(stack, top)->u.s.str = | |
1152 | *(const char **) (&filter_stack_data[ref->offset | |
1153 | + sizeof(unsigned long)]); | |
1154 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1155 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1156 | ret = -EINVAL; | |
1157 | goto end; | |
1158 | } | |
02aca193 PP |
1159 | estack_ax(stack, top)->u.s.literal_type = |
1160 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1161 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1162 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1163 | PO; | |
1164 | } | |
1165 | ||
1166 | OP(FILTER_OP_LOAD_FIELD_REF_S64): | |
1167 | { | |
1168 | struct load_op *insn = (struct load_op *) pc; | |
1169 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1170 | ||
1171 | dbg_printk("load field ref offset %u type s64\n", | |
1172 | ref->offset); | |
1173 | estack_push(stack, top, ax, bx); | |
1174 | estack_ax_v = | |
1175 | ((struct literal_numeric *) &filter_stack_data[ref->offset])->v; | |
1176 | dbg_printk("ref load s64 %lld\n", | |
1177 | (long long) estack_ax_v); | |
1178 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1179 | PO; | |
1180 | } | |
1181 | ||
1182 | OP(FILTER_OP_LOAD_FIELD_REF_DOUBLE): | |
1183 | { | |
1184 | BUG_ON(1); | |
1185 | PO; | |
1186 | } | |
1187 | ||
1188 | /* load from immediate operand */ | |
1189 | OP(FILTER_OP_LOAD_STRING): | |
1190 | { | |
1191 | struct load_op *insn = (struct load_op *) pc; | |
1192 | ||
1193 | dbg_printk("load string %s\n", insn->data); | |
1194 | estack_push(stack, top, ax, bx); | |
1195 | estack_ax(stack, top)->u.s.str = insn->data; | |
cbc19040 | 1196 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1197 | estack_ax(stack, top)->u.s.literal_type = |
1198 | ESTACK_STRING_LITERAL_TYPE_PLAIN; | |
1199 | estack_ax(stack, top)->u.s.user = 0; | |
1200 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1201 | PO; | |
1202 | } | |
1203 | ||
1204 | OP(FILTER_OP_LOAD_STAR_GLOB_STRING): | |
1205 | { | |
1206 | struct load_op *insn = (struct load_op *) pc; | |
1207 | ||
1208 | dbg_printk("load globbing pattern %s\n", insn->data); | |
1209 | estack_push(stack, top, ax, bx); | |
1210 | estack_ax(stack, top)->u.s.str = insn->data; | |
cbc19040 | 1211 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1212 | estack_ax(stack, top)->u.s.literal_type = |
1213 | ESTACK_STRING_LITERAL_TYPE_STAR_GLOB; | |
f127e61e | 1214 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1215 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
1216 | PO; | |
1217 | } | |
1218 | ||
1219 | OP(FILTER_OP_LOAD_S64): | |
1220 | { | |
1221 | struct load_op *insn = (struct load_op *) pc; | |
1222 | ||
1223 | estack_push(stack, top, ax, bx); | |
1224 | estack_ax_v = ((struct literal_numeric *) insn->data)->v; | |
1225 | dbg_printk("load s64 %lld\n", | |
1226 | (long long) estack_ax_v); | |
1227 | next_pc += sizeof(struct load_op) | |
1228 | + sizeof(struct literal_numeric); | |
1229 | PO; | |
1230 | } | |
1231 | ||
1232 | OP(FILTER_OP_LOAD_DOUBLE): | |
1233 | { | |
1234 | BUG_ON(1); | |
1235 | PO; | |
1236 | } | |
1237 | ||
1238 | /* cast */ | |
1239 | OP(FILTER_OP_CAST_TO_S64): | |
5a15f70c | 1240 | printk(KERN_WARNING "LTTng: filter: unsupported non-specialized bytecode op %u\n", |
07dfc1d0 MD |
1241 | (unsigned int) *(filter_opcode_t *) pc); |
1242 | ret = -EINVAL; | |
1243 | goto end; | |
1244 | ||
1245 | OP(FILTER_OP_CAST_DOUBLE_TO_S64): | |
1246 | { | |
1247 | BUG_ON(1); | |
1248 | PO; | |
1249 | } | |
1250 | ||
1251 | OP(FILTER_OP_CAST_NOP): | |
1252 | { | |
1253 | next_pc += sizeof(struct cast_op); | |
1254 | PO; | |
1255 | } | |
1256 | ||
1257 | /* get context ref */ | |
1258 | OP(FILTER_OP_GET_CONTEXT_REF_STRING): | |
1259 | { | |
1260 | struct load_op *insn = (struct load_op *) pc; | |
1261 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1262 | struct lttng_ctx_field *ctx_field; | |
1263 | union lttng_ctx_value v; | |
1264 | ||
1265 | dbg_printk("get context ref offset %u type string\n", | |
1266 | ref->offset); | |
1267 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1268 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
07dfc1d0 MD |
1269 | estack_push(stack, top, ax, bx); |
1270 | estack_ax(stack, top)->u.s.str = v.str; | |
1271 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1272 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1273 | ret = -EINVAL; | |
1274 | goto end; | |
1275 | } | |
cbc19040 | 1276 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1277 | estack_ax(stack, top)->u.s.literal_type = |
1278 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1279 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1280 | dbg_printk("ref get context string %s\n", estack_ax(stack, top)->u.s.str); |
1281 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1282 | PO; | |
1283 | } | |
1284 | ||
1285 | OP(FILTER_OP_GET_CONTEXT_REF_S64): | |
1286 | { | |
1287 | struct load_op *insn = (struct load_op *) pc; | |
1288 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1289 | struct lttng_ctx_field *ctx_field; | |
1290 | union lttng_ctx_value v; | |
1291 | ||
1292 | dbg_printk("get context ref offset %u type s64\n", | |
1293 | ref->offset); | |
1294 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1295 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
07dfc1d0 MD |
1296 | estack_push(stack, top, ax, bx); |
1297 | estack_ax_v = v.s64; | |
1298 | dbg_printk("ref get context s64 %lld\n", | |
1299 | (long long) estack_ax_v); | |
1300 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1301 | PO; | |
1302 | } | |
1303 | ||
1304 | OP(FILTER_OP_GET_CONTEXT_REF_DOUBLE): | |
1305 | { | |
1306 | BUG_ON(1); | |
1307 | PO; | |
1308 | } | |
1309 | ||
f127e61e MD |
1310 | /* load userspace field ref */ |
1311 | OP(FILTER_OP_LOAD_FIELD_REF_USER_STRING): | |
1312 | { | |
1313 | struct load_op *insn = (struct load_op *) pc; | |
1314 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1315 | ||
1316 | dbg_printk("load field ref offset %u type user string\n", | |
1317 | ref->offset); | |
1318 | estack_push(stack, top, ax, bx); | |
5b4ad89f | 1319 | estack_ax(stack, top)->u.s.user_str = |
f127e61e MD |
1320 | *(const char * const *) &filter_stack_data[ref->offset]; |
1321 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1322 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1323 | ret = -EINVAL; | |
1324 | goto end; | |
1325 | } | |
cbc19040 | 1326 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1327 | estack_ax(stack, top)->u.s.literal_type = |
1328 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
1329 | estack_ax(stack, top)->u.s.user = 1; |
1330 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); | |
1331 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1332 | PO; | |
1333 | } | |
1334 | ||
1335 | OP(FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE): | |
1336 | { | |
1337 | struct load_op *insn = (struct load_op *) pc; | |
1338 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1339 | ||
1340 | dbg_printk("load field ref offset %u type user sequence\n", | |
1341 | ref->offset); | |
1342 | estack_push(stack, top, ax, bx); | |
1343 | estack_ax(stack, top)->u.s.seq_len = | |
1344 | *(unsigned long *) &filter_stack_data[ref->offset]; | |
5b4ad89f | 1345 | estack_ax(stack, top)->u.s.user_str = |
f127e61e MD |
1346 | *(const char **) (&filter_stack_data[ref->offset |
1347 | + sizeof(unsigned long)]); | |
1348 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1349 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1350 | ret = -EINVAL; | |
1351 | goto end; | |
1352 | } | |
02aca193 PP |
1353 | estack_ax(stack, top)->u.s.literal_type = |
1354 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
1355 | estack_ax(stack, top)->u.s.user = 1; |
1356 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1357 | PO; | |
1358 | } | |
1359 | ||
3834b99f MD |
1360 | OP(FILTER_OP_GET_CONTEXT_ROOT): |
1361 | { | |
1362 | dbg_printk("op get context root\n"); | |
1363 | estack_push(stack, top, ax, bx); | |
1364 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_CONTEXT; | |
1365 | /* "field" only needed for variants. */ | |
1366 | estack_ax(stack, top)->u.ptr.field = NULL; | |
1367 | next_pc += sizeof(struct load_op); | |
1368 | PO; | |
1369 | } | |
1370 | ||
1371 | OP(FILTER_OP_GET_APP_CONTEXT_ROOT): | |
1372 | { | |
1373 | BUG_ON(1); | |
1374 | PO; | |
1375 | } | |
1376 | ||
1377 | OP(FILTER_OP_GET_PAYLOAD_ROOT): | |
1378 | { | |
1379 | dbg_printk("op get app payload root\n"); | |
1380 | estack_push(stack, top, ax, bx); | |
1381 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_PAYLOAD; | |
1382 | estack_ax(stack, top)->u.ptr.ptr = filter_stack_data; | |
1383 | /* "field" only needed for variants. */ | |
1384 | estack_ax(stack, top)->u.ptr.field = NULL; | |
1385 | next_pc += sizeof(struct load_op); | |
1386 | PO; | |
1387 | } | |
1388 | ||
1389 | OP(FILTER_OP_GET_SYMBOL): | |
1390 | { | |
1391 | dbg_printk("op get symbol\n"); | |
1392 | switch (estack_ax(stack, top)->u.ptr.type) { | |
1393 | case LOAD_OBJECT: | |
5a15f70c | 1394 | printk(KERN_WARNING "LTTng: filter: Nested fields not implemented yet.\n"); |
3834b99f MD |
1395 | ret = -EINVAL; |
1396 | goto end; | |
1397 | case LOAD_ROOT_CONTEXT: | |
1398 | case LOAD_ROOT_APP_CONTEXT: | |
1399 | case LOAD_ROOT_PAYLOAD: | |
1400 | /* | |
1401 | * symbol lookup is performed by | |
1402 | * specialization. | |
1403 | */ | |
1404 | ret = -EINVAL; | |
1405 | goto end; | |
1406 | } | |
1407 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1408 | PO; | |
1409 | } | |
1410 | ||
1411 | OP(FILTER_OP_GET_SYMBOL_FIELD): | |
1412 | { | |
1413 | /* | |
1414 | * Used for first variant encountered in a | |
1415 | * traversal. Variants are not implemented yet. | |
1416 | */ | |
1417 | ret = -EINVAL; | |
1418 | goto end; | |
1419 | } | |
1420 | ||
1421 | OP(FILTER_OP_GET_INDEX_U16): | |
1422 | { | |
1423 | struct load_op *insn = (struct load_op *) pc; | |
1424 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; | |
1425 | ||
1426 | dbg_printk("op get index u16\n"); | |
1427 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1428 | if (ret) | |
1429 | goto end; | |
1430 | estack_ax_v = estack_ax(stack, top)->u.v; | |
1431 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); | |
1432 | PO; | |
1433 | } | |
1434 | ||
1435 | OP(FILTER_OP_GET_INDEX_U64): | |
1436 | { | |
1437 | struct load_op *insn = (struct load_op *) pc; | |
1438 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; | |
1439 | ||
1440 | dbg_printk("op get index u64\n"); | |
1441 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1442 | if (ret) | |
1443 | goto end; | |
1444 | estack_ax_v = estack_ax(stack, top)->u.v; | |
1445 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); | |
1446 | PO; | |
1447 | } | |
1448 | ||
1449 | OP(FILTER_OP_LOAD_FIELD): | |
1450 | { | |
1451 | dbg_printk("op load field\n"); | |
1452 | ret = dynamic_load_field(estack_ax(stack, top)); | |
1453 | if (ret) | |
1454 | goto end; | |
1455 | estack_ax_v = estack_ax(stack, top)->u.v; | |
1456 | next_pc += sizeof(struct load_op); | |
1457 | PO; | |
1458 | } | |
1459 | ||
1460 | OP(FILTER_OP_LOAD_FIELD_S8): | |
1461 | { | |
1462 | dbg_printk("op load field s8\n"); | |
1463 | ||
1464 | estack_ax_v = *(int8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1465 | next_pc += sizeof(struct load_op); | |
1466 | PO; | |
1467 | } | |
1468 | OP(FILTER_OP_LOAD_FIELD_S16): | |
1469 | { | |
1470 | dbg_printk("op load field s16\n"); | |
1471 | ||
1472 | estack_ax_v = *(int16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1473 | next_pc += sizeof(struct load_op); | |
1474 | PO; | |
1475 | } | |
1476 | OP(FILTER_OP_LOAD_FIELD_S32): | |
1477 | { | |
1478 | dbg_printk("op load field s32\n"); | |
1479 | ||
1480 | estack_ax_v = *(int32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1481 | next_pc += sizeof(struct load_op); | |
1482 | PO; | |
1483 | } | |
1484 | OP(FILTER_OP_LOAD_FIELD_S64): | |
1485 | { | |
1486 | dbg_printk("op load field s64\n"); | |
1487 | ||
1488 | estack_ax_v = *(int64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1489 | next_pc += sizeof(struct load_op); | |
1490 | PO; | |
1491 | } | |
1492 | OP(FILTER_OP_LOAD_FIELD_U8): | |
1493 | { | |
1494 | dbg_printk("op load field u8\n"); | |
1495 | ||
1496 | estack_ax_v = *(uint8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1497 | next_pc += sizeof(struct load_op); | |
1498 | PO; | |
1499 | } | |
1500 | OP(FILTER_OP_LOAD_FIELD_U16): | |
1501 | { | |
1502 | dbg_printk("op load field u16\n"); | |
1503 | ||
1504 | estack_ax_v = *(uint16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1505 | next_pc += sizeof(struct load_op); | |
1506 | PO; | |
1507 | } | |
1508 | OP(FILTER_OP_LOAD_FIELD_U32): | |
1509 | { | |
1510 | dbg_printk("op load field u32\n"); | |
1511 | ||
1512 | estack_ax_v = *(uint32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1513 | next_pc += sizeof(struct load_op); | |
1514 | PO; | |
1515 | } | |
1516 | OP(FILTER_OP_LOAD_FIELD_U64): | |
1517 | { | |
1518 | dbg_printk("op load field u64\n"); | |
1519 | ||
1520 | estack_ax_v = *(uint64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
1521 | next_pc += sizeof(struct load_op); | |
1522 | PO; | |
1523 | } | |
1524 | OP(FILTER_OP_LOAD_FIELD_DOUBLE): | |
1525 | { | |
1526 | ret = -EINVAL; | |
1527 | goto end; | |
1528 | } | |
1529 | ||
1530 | OP(FILTER_OP_LOAD_FIELD_STRING): | |
1531 | { | |
1532 | const char *str; | |
1533 | ||
1534 | dbg_printk("op load field string\n"); | |
1535 | str = (const char *) estack_ax(stack, top)->u.ptr.ptr; | |
1536 | estack_ax(stack, top)->u.s.str = str; | |
1537 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1538 | dbg_printk("Filter warning: loading a NULL string.\n"); | |
1539 | ret = -EINVAL; | |
1540 | goto end; | |
1541 | } | |
4efe037b | 1542 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
1543 | estack_ax(stack, top)->u.s.literal_type = |
1544 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
1545 | next_pc += sizeof(struct load_op); | |
1546 | PO; | |
1547 | } | |
1548 | ||
1549 | OP(FILTER_OP_LOAD_FIELD_SEQUENCE): | |
1550 | { | |
1551 | const char *ptr; | |
1552 | ||
1553 | dbg_printk("op load field string sequence\n"); | |
1554 | ptr = estack_ax(stack, top)->u.ptr.ptr; | |
1555 | estack_ax(stack, top)->u.s.seq_len = *(unsigned long *) ptr; | |
1556 | estack_ax(stack, top)->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
1557 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
1558 | dbg_printk("Filter warning: loading a NULL sequence.\n"); | |
1559 | ret = -EINVAL; | |
1560 | goto end; | |
1561 | } | |
1562 | estack_ax(stack, top)->u.s.literal_type = | |
1563 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
1564 | next_pc += sizeof(struct load_op); | |
1565 | PO; | |
1566 | } | |
1567 | ||
07dfc1d0 MD |
1568 | END_OP |
1569 | end: | |
a93d4e71 | 1570 | /* Return _DISCARD on error. */ |
07dfc1d0 | 1571 | if (ret) |
a93d4e71 | 1572 | return LTTNG_FILTER_DISCARD; |
07dfc1d0 MD |
1573 | return retval; |
1574 | } | |
1575 | ||
1576 | #undef START_OP | |
1577 | #undef OP | |
1578 | #undef PO | |
1579 | #undef END_OP |