Commit | Line | Data |
---|---|---|
9f36eaed MJ |
1 | /* SPDX-License-Identifier: MIT |
2 | * | |
80c2a69a | 3 | * lttng-bytecode-interpreter.c |
07dfc1d0 | 4 | * |
80c2a69a | 5 | * LTTng modules bytecode interpreter. |
07dfc1d0 | 6 | * |
bbf3aef5 | 7 | * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
07dfc1d0 MD |
8 | */ |
9 | ||
80bb2600 | 10 | #include <wrapper/uaccess.h> |
d9053936 | 11 | #include <wrapper/objtool.h> |
cbc19040 | 12 | #include <wrapper/types.h> |
3834b99f | 13 | #include <linux/swab.h> |
f127e61e | 14 | |
80c2a69a | 15 | #include <lttng/lttng-bytecode.h> |
2df37e95 | 16 | #include <lttng/string-utils.h> |
07dfc1d0 | 17 | |
f127e61e MD |
18 | /* |
19 | * get_char should be called with page fault handler disabled if it is expected | |
20 | * to handle user-space read. | |
21 | */ | |
22 | static | |
23 | char get_char(struct estack_entry *reg, size_t offset) | |
24 | { | |
25 | if (unlikely(offset >= reg->u.s.seq_len)) | |
26 | return '\0'; | |
27 | if (reg->u.s.user) { | |
28 | char c; | |
29 | ||
30 | /* Handle invalid access as end of string. */ | |
80bb2600 | 31 | if (unlikely(!lttng_access_ok(VERIFY_READ, |
f127e61e MD |
32 | reg->u.s.user_str + offset, |
33 | sizeof(c)))) | |
34 | return '\0'; | |
35 | /* Handle fault (nonzero return value) as end of string. */ | |
36 | if (unlikely(__copy_from_user_inatomic(&c, | |
37 | reg->u.s.user_str + offset, | |
38 | sizeof(c)))) | |
39 | return '\0'; | |
40 | return c; | |
41 | } else { | |
42 | return reg->u.s.str[offset]; | |
43 | } | |
44 | } | |
45 | ||
07dfc1d0 MD |
46 | /* |
47 | * -1: wildcard found. | |
48 | * -2: unknown escape char. | |
49 | * 0: normal char. | |
50 | */ | |
07dfc1d0 | 51 | static |
f127e61e | 52 | int parse_char(struct estack_entry *reg, char *c, size_t *offset) |
07dfc1d0 | 53 | { |
f127e61e | 54 | switch (*c) { |
07dfc1d0 | 55 | case '\\': |
f127e61e MD |
56 | (*offset)++; |
57 | *c = get_char(reg, *offset); | |
58 | switch (*c) { | |
07dfc1d0 MD |
59 | case '\\': |
60 | case '*': | |
61 | return 0; | |
62 | default: | |
63 | return -2; | |
64 | } | |
65 | case '*': | |
66 | return -1; | |
67 | default: | |
68 | return 0; | |
69 | } | |
70 | } | |
71 | ||
02aca193 PP |
72 | static |
73 | char get_char_at_cb(size_t at, void *data) | |
74 | { | |
75 | return get_char(data, at); | |
76 | } | |
77 | ||
78 | static | |
79 | int stack_star_glob_match(struct estack *stack, int top, const char *cmp_type) | |
80 | { | |
81 | bool has_user = false; | |
02aca193 PP |
82 | int result; |
83 | struct estack_entry *pattern_reg; | |
84 | struct estack_entry *candidate_reg; | |
85 | ||
6f192a16 | 86 | /* Disable the page fault handler when reading from userspace. */ |
02aca193 PP |
87 | if (estack_bx(stack, top)->u.s.user |
88 | || estack_ax(stack, top)->u.s.user) { | |
89 | has_user = true; | |
02aca193 PP |
90 | pagefault_disable(); |
91 | } | |
92 | ||
93 | /* Find out which side is the pattern vs. the candidate. */ | |
94 | if (estack_ax(stack, top)->u.s.literal_type == ESTACK_STRING_LITERAL_TYPE_STAR_GLOB) { | |
95 | pattern_reg = estack_ax(stack, top); | |
96 | candidate_reg = estack_bx(stack, top); | |
97 | } else { | |
98 | pattern_reg = estack_bx(stack, top); | |
99 | candidate_reg = estack_ax(stack, top); | |
100 | } | |
101 | ||
102 | /* Perform the match operation. */ | |
103 | result = !strutils_star_glob_match_char_cb(get_char_at_cb, | |
104 | pattern_reg, get_char_at_cb, candidate_reg); | |
6f192a16 | 105 | if (has_user) |
02aca193 | 106 | pagefault_enable(); |
02aca193 PP |
107 | |
108 | return result; | |
109 | } | |
110 | ||
07dfc1d0 MD |
111 | static |
112 | int stack_strcmp(struct estack *stack, int top, const char *cmp_type) | |
113 | { | |
f127e61e MD |
114 | size_t offset_bx = 0, offset_ax = 0; |
115 | int diff, has_user = 0; | |
f127e61e MD |
116 | |
117 | if (estack_bx(stack, top)->u.s.user | |
118 | || estack_ax(stack, top)->u.s.user) { | |
119 | has_user = 1; | |
f127e61e MD |
120 | pagefault_disable(); |
121 | } | |
07dfc1d0 MD |
122 | |
123 | for (;;) { | |
f127e61e | 124 | int ret; |
07dfc1d0 | 125 | int escaped_r0 = 0; |
f127e61e | 126 | char char_bx, char_ax; |
07dfc1d0 | 127 | |
f127e61e MD |
128 | char_bx = get_char(estack_bx(stack, top), offset_bx); |
129 | char_ax = get_char(estack_ax(stack, top), offset_ax); | |
130 | ||
131 | if (unlikely(char_bx == '\0')) { | |
132 | if (char_ax == '\0') { | |
133 | diff = 0; | |
134 | break; | |
07dfc1d0 | 135 | } else { |
02aca193 PP |
136 | if (estack_ax(stack, top)->u.s.literal_type == |
137 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
138 | ret = parse_char(estack_ax(stack, top), |
139 | &char_ax, &offset_ax); | |
140 | if (ret == -1) { | |
141 | diff = 0; | |
142 | break; | |
143 | } | |
07dfc1d0 | 144 | } |
f127e61e MD |
145 | diff = -1; |
146 | break; | |
07dfc1d0 MD |
147 | } |
148 | } | |
f127e61e | 149 | if (unlikely(char_ax == '\0')) { |
02aca193 PP |
150 | if (estack_bx(stack, top)->u.s.literal_type == |
151 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
abfd272b MD |
152 | ret = parse_char(estack_bx(stack, top), |
153 | &char_bx, &offset_bx); | |
154 | if (ret == -1) { | |
155 | diff = 0; | |
156 | break; | |
07dfc1d0 | 157 | } |
07dfc1d0 | 158 | } |
abfd272b MD |
159 | diff = 1; |
160 | break; | |
07dfc1d0 | 161 | } |
02aca193 PP |
162 | if (estack_bx(stack, top)->u.s.literal_type == |
163 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
164 | ret = parse_char(estack_bx(stack, top), |
165 | &char_bx, &offset_bx); | |
07dfc1d0 | 166 | if (ret == -1) { |
f127e61e MD |
167 | diff = 0; |
168 | break; | |
07dfc1d0 MD |
169 | } else if (ret == -2) { |
170 | escaped_r0 = 1; | |
171 | } | |
172 | /* else compare both char */ | |
173 | } | |
02aca193 PP |
174 | if (estack_ax(stack, top)->u.s.literal_type == |
175 | ESTACK_STRING_LITERAL_TYPE_PLAIN) { | |
f127e61e MD |
176 | ret = parse_char(estack_ax(stack, top), |
177 | &char_ax, &offset_ax); | |
07dfc1d0 | 178 | if (ret == -1) { |
f127e61e MD |
179 | diff = 0; |
180 | break; | |
07dfc1d0 | 181 | } else if (ret == -2) { |
f127e61e MD |
182 | if (!escaped_r0) { |
183 | diff = -1; | |
184 | break; | |
185 | } | |
07dfc1d0 | 186 | } else { |
f127e61e MD |
187 | if (escaped_r0) { |
188 | diff = 1; | |
189 | break; | |
190 | } | |
07dfc1d0 MD |
191 | } |
192 | } else { | |
f127e61e MD |
193 | if (escaped_r0) { |
194 | diff = 1; | |
195 | break; | |
196 | } | |
07dfc1d0 | 197 | } |
f127e61e | 198 | diff = char_bx - char_ax; |
07dfc1d0 MD |
199 | if (diff != 0) |
200 | break; | |
f127e61e MD |
201 | offset_bx++; |
202 | offset_ax++; | |
203 | } | |
6f192a16 | 204 | if (has_user) |
f127e61e | 205 | pagefault_enable(); |
6f192a16 | 206 | |
07dfc1d0 MD |
207 | return diff; |
208 | } | |
209 | ||
80c2a69a | 210 | uint64_t lttng_bytecode_filter_interpret_false(void *filter_data, |
79150a49 | 211 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 MD |
212 | const char *filter_stack_data) |
213 | { | |
80c2a69a | 214 | return LTTNG_INTERPRETER_DISCARD; |
07dfc1d0 MD |
215 | } |
216 | ||
217 | #ifdef INTERPRETER_USE_SWITCH | |
218 | ||
219 | /* | |
220 | * Fallback for compilers that do not support taking address of labels. | |
221 | */ | |
222 | ||
223 | #define START_OP \ | |
224 | start_pc = &bytecode->data[0]; \ | |
225 | for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; \ | |
226 | pc = next_pc) { \ | |
5a15f70c | 227 | dbg_printk("LTTng: Executing op %s (%u)\n", \ |
80c2a69a FD |
228 | lttng_bytecode_print_op((unsigned int) *(bytecode_opcode_t *) pc), \ |
229 | (unsigned int) *(bytecode_opcode_t *) pc); \ | |
230 | switch (*(bytecode_opcode_t *) pc) { | |
07dfc1d0 MD |
231 | |
232 | #define OP(name) case name | |
233 | ||
234 | #define PO break | |
235 | ||
236 | #define END_OP } \ | |
237 | } | |
238 | ||
239 | #else | |
240 | ||
241 | /* | |
242 | * Dispatch-table based interpreter. | |
243 | */ | |
244 | ||
245 | #define START_OP \ | |
3834b99f | 246 | start_pc = &bytecode->code[0]; \ |
07dfc1d0 MD |
247 | pc = next_pc = start_pc; \ |
248 | if (unlikely(pc - start_pc >= bytecode->len)) \ | |
249 | goto end; \ | |
80c2a69a | 250 | goto *dispatch[*(bytecode_opcode_t *) pc]; |
07dfc1d0 MD |
251 | |
252 | #define OP(name) \ | |
253 | LABEL_##name | |
254 | ||
255 | #define PO \ | |
256 | pc = next_pc; \ | |
80c2a69a | 257 | goto *dispatch[*(bytecode_opcode_t *) pc]; |
07dfc1d0 MD |
258 | |
259 | #define END_OP | |
260 | ||
261 | #endif | |
262 | ||
1242217a FD |
263 | #define IS_INTEGER_REGISTER(reg_type) \ |
264 | (reg_type == REG_S64 || reg_type == REG_U64) | |
d644d1df | 265 | |
3834b99f MD |
266 | static int context_get_index(struct lttng_probe_ctx *lttng_probe_ctx, |
267 | struct load_ptr *ptr, | |
268 | uint32_t idx) | |
269 | { | |
270 | ||
271 | struct lttng_ctx_field *ctx_field; | |
272 | struct lttng_event_field *field; | |
273 | union lttng_ctx_value v; | |
274 | ||
275 | ctx_field = <tng_static_ctx->fields[idx]; | |
276 | field = &ctx_field->event_field; | |
277 | ptr->type = LOAD_OBJECT; | |
278 | /* field is only used for types nested within variants. */ | |
279 | ptr->field = NULL; | |
280 | ||
281 | switch (field->type.atype) { | |
282 | case atype_integer: | |
283 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
ceabb767 | 284 | if (field->type.u.integer.signedness) { |
3834b99f MD |
285 | ptr->object_type = OBJECT_TYPE_S64; |
286 | ptr->u.s64 = v.s64; | |
287 | ptr->ptr = &ptr->u.s64; | |
288 | } else { | |
289 | ptr->object_type = OBJECT_TYPE_U64; | |
290 | ptr->u.u64 = v.s64; /* Cast. */ | |
291 | ptr->ptr = &ptr->u.u64; | |
292 | } | |
293 | break; | |
ceabb767 | 294 | case atype_enum_nestable: |
3834b99f MD |
295 | { |
296 | const struct lttng_integer_type *itype = | |
ceabb767 | 297 | &field->type.u.enum_nestable.container_type->u.integer; |
3834b99f MD |
298 | |
299 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
300 | if (itype->signedness) { | |
301 | ptr->object_type = OBJECT_TYPE_S64; | |
302 | ptr->u.s64 = v.s64; | |
303 | ptr->ptr = &ptr->u.s64; | |
304 | } else { | |
305 | ptr->object_type = OBJECT_TYPE_U64; | |
306 | ptr->u.u64 = v.s64; /* Cast. */ | |
307 | ptr->ptr = &ptr->u.u64; | |
308 | } | |
309 | break; | |
310 | } | |
ceabb767 MD |
311 | case atype_array_nestable: |
312 | if (!lttng_is_bytewise_integer(field->type.u.array_nestable.elem_type)) { | |
80c2a69a | 313 | printk(KERN_WARNING "LTTng: bytecode: Array nesting only supports integer types.\n"); |
3834b99f MD |
314 | return -EINVAL; |
315 | } | |
ceabb767 | 316 | if (field->type.u.array_nestable.elem_type->u.integer.encoding == lttng_encode_none) { |
80c2a69a | 317 | printk(KERN_WARNING "LTTng: bytecode: Only string arrays are supported for contexts.\n"); |
3834b99f MD |
318 | return -EINVAL; |
319 | } | |
320 | ptr->object_type = OBJECT_TYPE_STRING; | |
321 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
322 | ptr->ptr = v.str; | |
323 | break; | |
ceabb767 MD |
324 | case atype_sequence_nestable: |
325 | if (!lttng_is_bytewise_integer(field->type.u.sequence_nestable.elem_type)) { | |
80c2a69a | 326 | printk(KERN_WARNING "LTTng: bytecode: Sequence nesting only supports integer types.\n"); |
3834b99f MD |
327 | return -EINVAL; |
328 | } | |
ceabb767 | 329 | if (field->type.u.sequence_nestable.elem_type->u.integer.encoding == lttng_encode_none) { |
80c2a69a | 330 | printk(KERN_WARNING "LTTng: bytecode: Only string sequences are supported for contexts.\n"); |
3834b99f MD |
331 | return -EINVAL; |
332 | } | |
333 | ptr->object_type = OBJECT_TYPE_STRING; | |
334 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
335 | ptr->ptr = v.str; | |
336 | break; | |
3834b99f MD |
337 | case atype_string: |
338 | ptr->object_type = OBJECT_TYPE_STRING; | |
339 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); | |
340 | ptr->ptr = v.str; | |
341 | break; | |
ceabb767 | 342 | case atype_struct_nestable: |
80c2a69a | 343 | printk(KERN_WARNING "LTTng: bytecode: Structure type cannot be loaded.\n"); |
3834b99f | 344 | return -EINVAL; |
ceabb767 | 345 | case atype_variant_nestable: |
80c2a69a | 346 | printk(KERN_WARNING "LTTng: bytecode: Variant type cannot be loaded.\n"); |
ceabb767 | 347 | return -EINVAL; |
3834b99f | 348 | default: |
80c2a69a | 349 | printk(KERN_WARNING "LTTng: bytecode: Unknown type: %d", (int) field->type.atype); |
3834b99f MD |
350 | return -EINVAL; |
351 | } | |
352 | return 0; | |
353 | } | |
354 | ||
355 | static int dynamic_get_index(struct lttng_probe_ctx *lttng_probe_ctx, | |
356 | struct bytecode_runtime *runtime, | |
357 | uint64_t index, struct estack_entry *stack_top) | |
358 | { | |
359 | int ret; | |
80c2a69a | 360 | const struct bytecode_get_index_data *gid; |
3834b99f | 361 | |
80c2a69a | 362 | gid = (const struct bytecode_get_index_data *) &runtime->data[index]; |
3834b99f MD |
363 | switch (stack_top->u.ptr.type) { |
364 | case LOAD_OBJECT: | |
365 | switch (stack_top->u.ptr.object_type) { | |
366 | case OBJECT_TYPE_ARRAY: | |
367 | { | |
368 | const char *ptr; | |
369 | ||
370 | WARN_ON_ONCE(gid->offset >= gid->array_len); | |
371 | /* Skip count (unsigned long) */ | |
372 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
373 | ptr = ptr + gid->offset; | |
374 | stack_top->u.ptr.ptr = ptr; | |
375 | stack_top->u.ptr.object_type = gid->elem.type; | |
376 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
03cb0cdd | 377 | BUG_ON(stack_top->u.ptr.field->type.atype != atype_array_nestable); |
3834b99f MD |
378 | stack_top->u.ptr.field = NULL; |
379 | break; | |
380 | } | |
381 | case OBJECT_TYPE_SEQUENCE: | |
382 | { | |
383 | const char *ptr; | |
384 | size_t ptr_seq_len; | |
385 | ||
386 | ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long)); | |
387 | ptr_seq_len = *(unsigned long *) stack_top->u.ptr.ptr; | |
388 | if (gid->offset >= gid->elem.len * ptr_seq_len) { | |
389 | ret = -EINVAL; | |
390 | goto end; | |
391 | } | |
392 | ptr = ptr + gid->offset; | |
393 | stack_top->u.ptr.ptr = ptr; | |
394 | stack_top->u.ptr.object_type = gid->elem.type; | |
395 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; | |
03cb0cdd | 396 | BUG_ON(stack_top->u.ptr.field->type.atype != atype_sequence_nestable); |
3834b99f MD |
397 | stack_top->u.ptr.field = NULL; |
398 | break; | |
399 | } | |
400 | case OBJECT_TYPE_STRUCT: | |
80c2a69a | 401 | printk(KERN_WARNING "LTTng: bytecode: Nested structures are not supported yet.\n"); |
3834b99f MD |
402 | ret = -EINVAL; |
403 | goto end; | |
404 | case OBJECT_TYPE_VARIANT: | |
405 | default: | |
80c2a69a | 406 | printk(KERN_WARNING "LTTng: bytecode: Unexpected get index type %d", |
3834b99f MD |
407 | (int) stack_top->u.ptr.object_type); |
408 | ret = -EINVAL; | |
409 | goto end; | |
410 | } | |
411 | break; | |
412 | case LOAD_ROOT_CONTEXT: | |
413 | case LOAD_ROOT_APP_CONTEXT: /* Fall-through */ | |
414 | { | |
415 | ret = context_get_index(lttng_probe_ctx, | |
416 | &stack_top->u.ptr, | |
417 | gid->ctx_index); | |
418 | if (ret) { | |
419 | goto end; | |
420 | } | |
421 | break; | |
422 | } | |
423 | case LOAD_ROOT_PAYLOAD: | |
424 | stack_top->u.ptr.ptr += gid->offset; | |
425 | if (gid->elem.type == OBJECT_TYPE_STRING) | |
426 | stack_top->u.ptr.ptr = *(const char * const *) stack_top->u.ptr.ptr; | |
427 | stack_top->u.ptr.object_type = gid->elem.type; | |
428 | stack_top->u.ptr.type = LOAD_OBJECT; | |
03cb0cdd | 429 | stack_top->u.ptr.field = gid->field; |
60e8b0d6 | 430 | stack_top->u.ptr.rev_bo = gid->elem.rev_bo; |
3834b99f MD |
431 | break; |
432 | } | |
196e531f FD |
433 | |
434 | stack_top->type = REG_PTR; | |
435 | ||
3834b99f MD |
436 | return 0; |
437 | ||
438 | end: | |
439 | return ret; | |
440 | } | |
441 | ||
442 | static int dynamic_load_field(struct estack_entry *stack_top) | |
443 | { | |
444 | int ret; | |
445 | ||
446 | switch (stack_top->u.ptr.type) { | |
447 | case LOAD_OBJECT: | |
448 | break; | |
449 | case LOAD_ROOT_CONTEXT: | |
450 | case LOAD_ROOT_APP_CONTEXT: | |
451 | case LOAD_ROOT_PAYLOAD: | |
452 | default: | |
80c2a69a | 453 | dbg_printk("Bytecode warning: cannot load root, missing field name.\n"); |
3834b99f MD |
454 | ret = -EINVAL; |
455 | goto end; | |
456 | } | |
457 | switch (stack_top->u.ptr.object_type) { | |
458 | case OBJECT_TYPE_S8: | |
459 | dbg_printk("op load field s8\n"); | |
460 | stack_top->u.v = *(int8_t *) stack_top->u.ptr.ptr; | |
d644d1df | 461 | stack_top->type = REG_S64; |
3834b99f MD |
462 | break; |
463 | case OBJECT_TYPE_S16: | |
464 | { | |
465 | int16_t tmp; | |
466 | ||
467 | dbg_printk("op load field s16\n"); | |
468 | tmp = *(int16_t *) stack_top->u.ptr.ptr; | |
469 | if (stack_top->u.ptr.rev_bo) | |
470 | __swab16s(&tmp); | |
471 | stack_top->u.v = tmp; | |
d644d1df | 472 | stack_top->type = REG_S64; |
3834b99f MD |
473 | break; |
474 | } | |
475 | case OBJECT_TYPE_S32: | |
476 | { | |
477 | int32_t tmp; | |
478 | ||
479 | dbg_printk("op load field s32\n"); | |
480 | tmp = *(int32_t *) stack_top->u.ptr.ptr; | |
481 | if (stack_top->u.ptr.rev_bo) | |
482 | __swab32s(&tmp); | |
483 | stack_top->u.v = tmp; | |
d644d1df | 484 | stack_top->type = REG_S64; |
3834b99f MD |
485 | break; |
486 | } | |
487 | case OBJECT_TYPE_S64: | |
488 | { | |
489 | int64_t tmp; | |
490 | ||
491 | dbg_printk("op load field s64\n"); | |
492 | tmp = *(int64_t *) stack_top->u.ptr.ptr; | |
493 | if (stack_top->u.ptr.rev_bo) | |
494 | __swab64s(&tmp); | |
495 | stack_top->u.v = tmp; | |
d644d1df | 496 | stack_top->type = REG_S64; |
3834b99f MD |
497 | break; |
498 | } | |
499 | case OBJECT_TYPE_U8: | |
500 | dbg_printk("op load field u8\n"); | |
501 | stack_top->u.v = *(uint8_t *) stack_top->u.ptr.ptr; | |
1242217a | 502 | stack_top->type = REG_U64; |
3834b99f MD |
503 | break; |
504 | case OBJECT_TYPE_U16: | |
505 | { | |
506 | uint16_t tmp; | |
507 | ||
5fae98f7 | 508 | dbg_printk("op load field u16\n"); |
3834b99f MD |
509 | tmp = *(uint16_t *) stack_top->u.ptr.ptr; |
510 | if (stack_top->u.ptr.rev_bo) | |
511 | __swab16s(&tmp); | |
512 | stack_top->u.v = tmp; | |
1242217a | 513 | stack_top->type = REG_U64; |
3834b99f MD |
514 | break; |
515 | } | |
516 | case OBJECT_TYPE_U32: | |
517 | { | |
518 | uint32_t tmp; | |
519 | ||
520 | dbg_printk("op load field u32\n"); | |
521 | tmp = *(uint32_t *) stack_top->u.ptr.ptr; | |
522 | if (stack_top->u.ptr.rev_bo) | |
523 | __swab32s(&tmp); | |
524 | stack_top->u.v = tmp; | |
1242217a | 525 | stack_top->type = REG_U64; |
3834b99f MD |
526 | break; |
527 | } | |
528 | case OBJECT_TYPE_U64: | |
529 | { | |
530 | uint64_t tmp; | |
531 | ||
532 | dbg_printk("op load field u64\n"); | |
533 | tmp = *(uint64_t *) stack_top->u.ptr.ptr; | |
534 | if (stack_top->u.ptr.rev_bo) | |
535 | __swab64s(&tmp); | |
536 | stack_top->u.v = tmp; | |
1242217a | 537 | stack_top->type = REG_U64; |
3834b99f MD |
538 | break; |
539 | } | |
540 | case OBJECT_TYPE_STRING: | |
541 | { | |
542 | const char *str; | |
543 | ||
544 | dbg_printk("op load field string\n"); | |
545 | str = (const char *) stack_top->u.ptr.ptr; | |
546 | stack_top->u.s.str = str; | |
547 | if (unlikely(!stack_top->u.s.str)) { | |
80c2a69a | 548 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
3834b99f MD |
549 | ret = -EINVAL; |
550 | goto end; | |
551 | } | |
4efe037b | 552 | stack_top->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
553 | stack_top->u.s.literal_type = |
554 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 555 | stack_top->type = REG_STRING; |
3834b99f MD |
556 | break; |
557 | } | |
558 | case OBJECT_TYPE_STRING_SEQUENCE: | |
559 | { | |
560 | const char *ptr; | |
561 | ||
562 | dbg_printk("op load field string sequence\n"); | |
563 | ptr = stack_top->u.ptr.ptr; | |
564 | stack_top->u.s.seq_len = *(unsigned long *) ptr; | |
565 | stack_top->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
566 | if (unlikely(!stack_top->u.s.str)) { | |
80c2a69a | 567 | dbg_printk("Bytecode warning: loading a NULL sequence.\n"); |
3834b99f MD |
568 | ret = -EINVAL; |
569 | goto end; | |
570 | } | |
571 | stack_top->u.s.literal_type = | |
572 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 573 | stack_top->type = REG_STRING; |
3834b99f MD |
574 | break; |
575 | } | |
576 | case OBJECT_TYPE_DYNAMIC: | |
577 | /* | |
578 | * Dynamic types in context are looked up | |
579 | * by context get index. | |
580 | */ | |
581 | ret = -EINVAL; | |
582 | goto end; | |
583 | case OBJECT_TYPE_DOUBLE: | |
584 | ret = -EINVAL; | |
585 | goto end; | |
586 | case OBJECT_TYPE_SEQUENCE: | |
587 | case OBJECT_TYPE_ARRAY: | |
588 | case OBJECT_TYPE_STRUCT: | |
589 | case OBJECT_TYPE_VARIANT: | |
80c2a69a | 590 | printk(KERN_WARNING "LTTng: bytecode: Sequences, arrays, struct and variant cannot be loaded (nested types).\n"); |
3834b99f MD |
591 | ret = -EINVAL; |
592 | goto end; | |
593 | } | |
594 | return 0; | |
595 | ||
596 | end: | |
597 | return ret; | |
598 | } | |
599 | ||
03cb0cdd FD |
600 | static |
601 | int lttng_bytecode_interpret_format_output(struct estack_entry *ax, | |
602 | struct lttng_interpreter_output *output) | |
603 | { | |
604 | int ret; | |
605 | ||
606 | again: | |
607 | switch (ax->type) { | |
608 | case REG_S64: | |
609 | output->type = LTTNG_INTERPRETER_TYPE_S64; | |
610 | output->u.s = ax->u.v; | |
611 | break; | |
612 | case REG_U64: | |
613 | output->type = LTTNG_INTERPRETER_TYPE_U64; | |
614 | output->u.u = (uint64_t) ax->u.v; | |
615 | break; | |
616 | case REG_STRING: | |
617 | output->type = LTTNG_INTERPRETER_TYPE_STRING; | |
618 | output->u.str.str = ax->u.s.str; | |
619 | output->u.str.len = ax->u.s.seq_len; | |
620 | break; | |
621 | case REG_PTR: | |
622 | switch (ax->u.ptr.object_type) { | |
623 | case OBJECT_TYPE_S8: | |
624 | case OBJECT_TYPE_S16: | |
625 | case OBJECT_TYPE_S32: | |
626 | case OBJECT_TYPE_S64: | |
627 | case OBJECT_TYPE_U8: | |
628 | case OBJECT_TYPE_U16: | |
629 | case OBJECT_TYPE_U32: | |
630 | case OBJECT_TYPE_U64: | |
631 | case OBJECT_TYPE_DOUBLE: | |
632 | case OBJECT_TYPE_STRING: | |
633 | case OBJECT_TYPE_STRING_SEQUENCE: | |
634 | ret = dynamic_load_field(ax); | |
635 | if (ret) | |
636 | return ret; | |
637 | /* Retry after loading ptr into stack top. */ | |
638 | goto again; | |
639 | case OBJECT_TYPE_SEQUENCE: | |
640 | output->type = LTTNG_INTERPRETER_TYPE_SEQUENCE; | |
641 | output->u.sequence.ptr = *(const char **) (ax->u.ptr.ptr + sizeof(unsigned long)); | |
642 | output->u.sequence.nr_elem = *(unsigned long *) ax->u.ptr.ptr; | |
643 | output->u.sequence.nested_type = ax->u.ptr.field->type.u.sequence_nestable.elem_type; | |
644 | break; | |
645 | case OBJECT_TYPE_ARRAY: | |
646 | /* Skip count (unsigned long) */ | |
647 | output->type = LTTNG_INTERPRETER_TYPE_SEQUENCE; | |
648 | output->u.sequence.ptr = *(const char **) (ax->u.ptr.ptr + sizeof(unsigned long)); | |
649 | output->u.sequence.nr_elem = ax->u.ptr.field->type.u.array_nestable.length; | |
650 | output->u.sequence.nested_type = ax->u.ptr.field->type.u.array_nestable.elem_type; | |
651 | break; | |
652 | case OBJECT_TYPE_STRUCT: | |
653 | case OBJECT_TYPE_VARIANT: | |
654 | default: | |
655 | return -EINVAL; | |
656 | } | |
657 | ||
658 | break; | |
659 | case REG_STAR_GLOB_STRING: | |
660 | case REG_TYPE_UNKNOWN: | |
661 | default: | |
662 | return -EINVAL; | |
663 | } | |
664 | ||
80c2a69a | 665 | return LTTNG_INTERPRETER_RECORD_FLAG; |
03cb0cdd FD |
666 | } |
667 | ||
07dfc1d0 MD |
668 | /* |
669 | * Return 0 (discard), or raise the 0x1 flag (log event). | |
670 | * Currently, other flags are kept for future extensions and have no | |
671 | * effect. | |
672 | */ | |
03cb0cdd FD |
673 | static |
674 | uint64_t bytecode_interpret(void *interpreter_data, | |
79150a49 | 675 | struct lttng_probe_ctx *lttng_probe_ctx, |
03cb0cdd FD |
676 | const char *interpreter_stack_data, |
677 | struct lttng_interpreter_output *output) | |
07dfc1d0 | 678 | { |
03cb0cdd | 679 | struct bytecode_runtime *bytecode = interpreter_data; |
07dfc1d0 MD |
680 | void *pc, *next_pc, *start_pc; |
681 | int ret = -EINVAL; | |
682 | uint64_t retval = 0; | |
683 | struct estack _stack; | |
684 | struct estack *stack = &_stack; | |
685 | register int64_t ax = 0, bx = 0; | |
d644d1df | 686 | register enum entry_type ax_t = REG_TYPE_UNKNOWN, bx_t = REG_TYPE_UNKNOWN; |
80c2a69a | 687 | register int top = INTERPRETER_STACK_EMPTY; |
07dfc1d0 | 688 | #ifndef INTERPRETER_USE_SWITCH |
80c2a69a FD |
689 | static void *dispatch[NR_BYTECODE_OPS] = { |
690 | [ BYTECODE_OP_UNKNOWN ] = &&LABEL_BYTECODE_OP_UNKNOWN, | |
07dfc1d0 | 691 | |
80c2a69a | 692 | [ BYTECODE_OP_RETURN ] = &&LABEL_BYTECODE_OP_RETURN, |
07dfc1d0 MD |
693 | |
694 | /* binary */ | |
80c2a69a FD |
695 | [ BYTECODE_OP_MUL ] = &&LABEL_BYTECODE_OP_MUL, |
696 | [ BYTECODE_OP_DIV ] = &&LABEL_BYTECODE_OP_DIV, | |
697 | [ BYTECODE_OP_MOD ] = &&LABEL_BYTECODE_OP_MOD, | |
698 | [ BYTECODE_OP_PLUS ] = &&LABEL_BYTECODE_OP_PLUS, | |
699 | [ BYTECODE_OP_MINUS ] = &&LABEL_BYTECODE_OP_MINUS, | |
700 | [ BYTECODE_OP_BIT_RSHIFT ] = &&LABEL_BYTECODE_OP_BIT_RSHIFT, | |
701 | [ BYTECODE_OP_BIT_LSHIFT ] = &&LABEL_BYTECODE_OP_BIT_LSHIFT, | |
702 | [ BYTECODE_OP_BIT_AND ] = &&LABEL_BYTECODE_OP_BIT_AND, | |
703 | [ BYTECODE_OP_BIT_OR ] = &&LABEL_BYTECODE_OP_BIT_OR, | |
704 | [ BYTECODE_OP_BIT_XOR ] = &&LABEL_BYTECODE_OP_BIT_XOR, | |
07dfc1d0 MD |
705 | |
706 | /* binary comparators */ | |
80c2a69a FD |
707 | [ BYTECODE_OP_EQ ] = &&LABEL_BYTECODE_OP_EQ, |
708 | [ BYTECODE_OP_NE ] = &&LABEL_BYTECODE_OP_NE, | |
709 | [ BYTECODE_OP_GT ] = &&LABEL_BYTECODE_OP_GT, | |
710 | [ BYTECODE_OP_LT ] = &&LABEL_BYTECODE_OP_LT, | |
711 | [ BYTECODE_OP_GE ] = &&LABEL_BYTECODE_OP_GE, | |
712 | [ BYTECODE_OP_LE ] = &&LABEL_BYTECODE_OP_LE, | |
07dfc1d0 MD |
713 | |
714 | /* string binary comparator */ | |
80c2a69a FD |
715 | [ BYTECODE_OP_EQ_STRING ] = &&LABEL_BYTECODE_OP_EQ_STRING, |
716 | [ BYTECODE_OP_NE_STRING ] = &&LABEL_BYTECODE_OP_NE_STRING, | |
717 | [ BYTECODE_OP_GT_STRING ] = &&LABEL_BYTECODE_OP_GT_STRING, | |
718 | [ BYTECODE_OP_LT_STRING ] = &&LABEL_BYTECODE_OP_LT_STRING, | |
719 | [ BYTECODE_OP_GE_STRING ] = &&LABEL_BYTECODE_OP_GE_STRING, | |
720 | [ BYTECODE_OP_LE_STRING ] = &&LABEL_BYTECODE_OP_LE_STRING, | |
07dfc1d0 | 721 | |
02aca193 | 722 | /* globbing pattern binary comparator */ |
80c2a69a FD |
723 | [ BYTECODE_OP_EQ_STAR_GLOB_STRING ] = &&LABEL_BYTECODE_OP_EQ_STAR_GLOB_STRING, |
724 | [ BYTECODE_OP_NE_STAR_GLOB_STRING ] = &&LABEL_BYTECODE_OP_NE_STAR_GLOB_STRING, | |
02aca193 | 725 | |
07dfc1d0 | 726 | /* s64 binary comparator */ |
80c2a69a FD |
727 | [ BYTECODE_OP_EQ_S64 ] = &&LABEL_BYTECODE_OP_EQ_S64, |
728 | [ BYTECODE_OP_NE_S64 ] = &&LABEL_BYTECODE_OP_NE_S64, | |
729 | [ BYTECODE_OP_GT_S64 ] = &&LABEL_BYTECODE_OP_GT_S64, | |
730 | [ BYTECODE_OP_LT_S64 ] = &&LABEL_BYTECODE_OP_LT_S64, | |
731 | [ BYTECODE_OP_GE_S64 ] = &&LABEL_BYTECODE_OP_GE_S64, | |
732 | [ BYTECODE_OP_LE_S64 ] = &&LABEL_BYTECODE_OP_LE_S64, | |
07dfc1d0 MD |
733 | |
734 | /* double binary comparator */ | |
80c2a69a FD |
735 | [ BYTECODE_OP_EQ_DOUBLE ] = &&LABEL_BYTECODE_OP_EQ_DOUBLE, |
736 | [ BYTECODE_OP_NE_DOUBLE ] = &&LABEL_BYTECODE_OP_NE_DOUBLE, | |
737 | [ BYTECODE_OP_GT_DOUBLE ] = &&LABEL_BYTECODE_OP_GT_DOUBLE, | |
738 | [ BYTECODE_OP_LT_DOUBLE ] = &&LABEL_BYTECODE_OP_LT_DOUBLE, | |
739 | [ BYTECODE_OP_GE_DOUBLE ] = &&LABEL_BYTECODE_OP_GE_DOUBLE, | |
740 | [ BYTECODE_OP_LE_DOUBLE ] = &&LABEL_BYTECODE_OP_LE_DOUBLE, | |
07dfc1d0 MD |
741 | |
742 | /* Mixed S64-double binary comparators */ | |
80c2a69a FD |
743 | [ BYTECODE_OP_EQ_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_EQ_DOUBLE_S64, |
744 | [ BYTECODE_OP_NE_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_NE_DOUBLE_S64, | |
745 | [ BYTECODE_OP_GT_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_GT_DOUBLE_S64, | |
746 | [ BYTECODE_OP_LT_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_LT_DOUBLE_S64, | |
747 | [ BYTECODE_OP_GE_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_GE_DOUBLE_S64, | |
748 | [ BYTECODE_OP_LE_DOUBLE_S64 ] = &&LABEL_BYTECODE_OP_LE_DOUBLE_S64, | |
749 | ||
750 | [ BYTECODE_OP_EQ_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_EQ_S64_DOUBLE, | |
751 | [ BYTECODE_OP_NE_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_NE_S64_DOUBLE, | |
752 | [ BYTECODE_OP_GT_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_GT_S64_DOUBLE, | |
753 | [ BYTECODE_OP_LT_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_LT_S64_DOUBLE, | |
754 | [ BYTECODE_OP_GE_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_GE_S64_DOUBLE, | |
755 | [ BYTECODE_OP_LE_S64_DOUBLE ] = &&LABEL_BYTECODE_OP_LE_S64_DOUBLE, | |
07dfc1d0 MD |
756 | |
757 | /* unary */ | |
80c2a69a FD |
758 | [ BYTECODE_OP_UNARY_PLUS ] = &&LABEL_BYTECODE_OP_UNARY_PLUS, |
759 | [ BYTECODE_OP_UNARY_MINUS ] = &&LABEL_BYTECODE_OP_UNARY_MINUS, | |
760 | [ BYTECODE_OP_UNARY_NOT ] = &&LABEL_BYTECODE_OP_UNARY_NOT, | |
761 | [ BYTECODE_OP_UNARY_PLUS_S64 ] = &&LABEL_BYTECODE_OP_UNARY_PLUS_S64, | |
762 | [ BYTECODE_OP_UNARY_MINUS_S64 ] = &&LABEL_BYTECODE_OP_UNARY_MINUS_S64, | |
763 | [ BYTECODE_OP_UNARY_NOT_S64 ] = &&LABEL_BYTECODE_OP_UNARY_NOT_S64, | |
764 | [ BYTECODE_OP_UNARY_PLUS_DOUBLE ] = &&LABEL_BYTECODE_OP_UNARY_PLUS_DOUBLE, | |
765 | [ BYTECODE_OP_UNARY_MINUS_DOUBLE ] = &&LABEL_BYTECODE_OP_UNARY_MINUS_DOUBLE, | |
766 | [ BYTECODE_OP_UNARY_NOT_DOUBLE ] = &&LABEL_BYTECODE_OP_UNARY_NOT_DOUBLE, | |
07dfc1d0 MD |
767 | |
768 | /* logical */ | |
80c2a69a FD |
769 | [ BYTECODE_OP_AND ] = &&LABEL_BYTECODE_OP_AND, |
770 | [ BYTECODE_OP_OR ] = &&LABEL_BYTECODE_OP_OR, | |
07dfc1d0 MD |
771 | |
772 | /* load field ref */ | |
80c2a69a FD |
773 | [ BYTECODE_OP_LOAD_FIELD_REF ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF, |
774 | [ BYTECODE_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_STRING, | |
775 | [ BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE, | |
776 | [ BYTECODE_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_S64, | |
777 | [ BYTECODE_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_DOUBLE, | |
07dfc1d0 MD |
778 | |
779 | /* load from immediate operand */ | |
80c2a69a FD |
780 | [ BYTECODE_OP_LOAD_STRING ] = &&LABEL_BYTECODE_OP_LOAD_STRING, |
781 | [ BYTECODE_OP_LOAD_STAR_GLOB_STRING ] = &&LABEL_BYTECODE_OP_LOAD_STAR_GLOB_STRING, | |
782 | [ BYTECODE_OP_LOAD_S64 ] = &&LABEL_BYTECODE_OP_LOAD_S64, | |
783 | [ BYTECODE_OP_LOAD_DOUBLE ] = &&LABEL_BYTECODE_OP_LOAD_DOUBLE, | |
07dfc1d0 MD |
784 | |
785 | /* cast */ | |
80c2a69a FD |
786 | [ BYTECODE_OP_CAST_TO_S64 ] = &&LABEL_BYTECODE_OP_CAST_TO_S64, |
787 | [ BYTECODE_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_BYTECODE_OP_CAST_DOUBLE_TO_S64, | |
788 | [ BYTECODE_OP_CAST_NOP ] = &&LABEL_BYTECODE_OP_CAST_NOP, | |
07dfc1d0 MD |
789 | |
790 | /* get context ref */ | |
80c2a69a FD |
791 | [ BYTECODE_OP_GET_CONTEXT_REF ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_REF, |
792 | [ BYTECODE_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_REF_STRING, | |
793 | [ BYTECODE_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_REF_S64, | |
794 | [ BYTECODE_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_REF_DOUBLE, | |
f127e61e MD |
795 | |
796 | /* load userspace field ref */ | |
80c2a69a FD |
797 | [ BYTECODE_OP_LOAD_FIELD_REF_USER_STRING ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_USER_STRING, |
798 | [ BYTECODE_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_REF_USER_SEQUENCE, | |
3834b99f MD |
799 | |
800 | /* Instructions for recursive traversal through composed types. */ | |
80c2a69a FD |
801 | [ BYTECODE_OP_GET_CONTEXT_ROOT ] = &&LABEL_BYTECODE_OP_GET_CONTEXT_ROOT, |
802 | [ BYTECODE_OP_GET_APP_CONTEXT_ROOT ] = &&LABEL_BYTECODE_OP_GET_APP_CONTEXT_ROOT, | |
803 | [ BYTECODE_OP_GET_PAYLOAD_ROOT ] = &&LABEL_BYTECODE_OP_GET_PAYLOAD_ROOT, | |
804 | ||
805 | [ BYTECODE_OP_GET_SYMBOL ] = &&LABEL_BYTECODE_OP_GET_SYMBOL, | |
806 | [ BYTECODE_OP_GET_SYMBOL_FIELD ] = &&LABEL_BYTECODE_OP_GET_SYMBOL_FIELD, | |
807 | [ BYTECODE_OP_GET_INDEX_U16 ] = &&LABEL_BYTECODE_OP_GET_INDEX_U16, | |
808 | [ BYTECODE_OP_GET_INDEX_U64 ] = &&LABEL_BYTECODE_OP_GET_INDEX_U64, | |
809 | ||
810 | [ BYTECODE_OP_LOAD_FIELD ] = &&LABEL_BYTECODE_OP_LOAD_FIELD, | |
811 | [ BYTECODE_OP_LOAD_FIELD_S8 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_S8, | |
812 | [ BYTECODE_OP_LOAD_FIELD_S16 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_S16, | |
813 | [ BYTECODE_OP_LOAD_FIELD_S32 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_S32, | |
814 | [ BYTECODE_OP_LOAD_FIELD_S64 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_S64, | |
815 | [ BYTECODE_OP_LOAD_FIELD_U8 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_U8, | |
816 | [ BYTECODE_OP_LOAD_FIELD_U16 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_U16, | |
817 | [ BYTECODE_OP_LOAD_FIELD_U32 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_U32, | |
818 | [ BYTECODE_OP_LOAD_FIELD_U64 ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_U64, | |
819 | [ BYTECODE_OP_LOAD_FIELD_STRING ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_STRING, | |
820 | [ BYTECODE_OP_LOAD_FIELD_SEQUENCE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_SEQUENCE, | |
821 | [ BYTECODE_OP_LOAD_FIELD_DOUBLE ] = &&LABEL_BYTECODE_OP_LOAD_FIELD_DOUBLE, | |
822 | ||
823 | [ BYTECODE_OP_UNARY_BIT_NOT ] = &&LABEL_BYTECODE_OP_UNARY_BIT_NOT, | |
824 | ||
825 | [ BYTECODE_OP_RETURN_S64 ] = &&LABEL_BYTECODE_OP_RETURN_S64, | |
07dfc1d0 MD |
826 | }; |
827 | #endif /* #ifndef INTERPRETER_USE_SWITCH */ | |
828 | ||
829 | START_OP | |
830 | ||
80c2a69a FD |
831 | OP(BYTECODE_OP_UNKNOWN): |
832 | OP(BYTECODE_OP_LOAD_FIELD_REF): | |
833 | OP(BYTECODE_OP_GET_CONTEXT_REF): | |
07dfc1d0 MD |
834 | #ifdef INTERPRETER_USE_SWITCH |
835 | default: | |
836 | #endif /* INTERPRETER_USE_SWITCH */ | |
80c2a69a FD |
837 | printk(KERN_WARNING "LTTng: bytecode: unknown bytecode op %u\n", |
838 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
839 | ret = -EINVAL; |
840 | goto end; | |
841 | ||
80c2a69a FD |
842 | OP(BYTECODE_OP_RETURN): |
843 | OP(BYTECODE_OP_RETURN_S64): | |
844 | /* LTTNG_INTERPRETER_DISCARD or LTTNG_INTERPRETER_RECORD_FLAG */ | |
d644d1df FD |
845 | switch (estack_ax_t) { |
846 | case REG_S64: | |
1242217a | 847 | case REG_U64: |
d644d1df FD |
848 | retval = !!estack_ax_v; |
849 | break; | |
850 | case REG_DOUBLE: | |
851 | case REG_STRING: | |
852 | case REG_PTR: | |
03cb0cdd FD |
853 | if (!output) { |
854 | ret = -EINVAL; | |
855 | goto end; | |
856 | } | |
857 | retval = 0; | |
858 | break; | |
d644d1df FD |
859 | case REG_STAR_GLOB_STRING: |
860 | case REG_TYPE_UNKNOWN: | |
861 | ret = -EINVAL; | |
862 | goto end; | |
863 | } | |
07dfc1d0 MD |
864 | ret = 0; |
865 | goto end; | |
866 | ||
867 | /* binary */ | |
80c2a69a FD |
868 | OP(BYTECODE_OP_MUL): |
869 | OP(BYTECODE_OP_DIV): | |
870 | OP(BYTECODE_OP_MOD): | |
871 | OP(BYTECODE_OP_PLUS): | |
872 | OP(BYTECODE_OP_MINUS): | |
873 | printk(KERN_WARNING "LTTng: bytecode: unsupported bytecode op %u\n", | |
874 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
875 | ret = -EINVAL; |
876 | goto end; | |
877 | ||
80c2a69a FD |
878 | OP(BYTECODE_OP_EQ): |
879 | OP(BYTECODE_OP_NE): | |
880 | OP(BYTECODE_OP_GT): | |
881 | OP(BYTECODE_OP_LT): | |
882 | OP(BYTECODE_OP_GE): | |
883 | OP(BYTECODE_OP_LE): | |
884 | printk(KERN_WARNING "LTTng: bytecode: unsupported non-specialized bytecode op %u\n", | |
885 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
886 | ret = -EINVAL; |
887 | goto end; | |
888 | ||
80c2a69a | 889 | OP(BYTECODE_OP_EQ_STRING): |
07dfc1d0 MD |
890 | { |
891 | int res; | |
892 | ||
893 | res = (stack_strcmp(stack, top, "==") == 0); | |
d644d1df | 894 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 895 | estack_ax_v = res; |
d644d1df | 896 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
897 | next_pc += sizeof(struct binary_op); |
898 | PO; | |
899 | } | |
80c2a69a | 900 | OP(BYTECODE_OP_NE_STRING): |
07dfc1d0 MD |
901 | { |
902 | int res; | |
903 | ||
904 | res = (stack_strcmp(stack, top, "!=") != 0); | |
d644d1df | 905 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 906 | estack_ax_v = res; |
d644d1df | 907 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
908 | next_pc += sizeof(struct binary_op); |
909 | PO; | |
910 | } | |
80c2a69a | 911 | OP(BYTECODE_OP_GT_STRING): |
07dfc1d0 MD |
912 | { |
913 | int res; | |
914 | ||
915 | res = (stack_strcmp(stack, top, ">") > 0); | |
d644d1df | 916 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 917 | estack_ax_v = res; |
d644d1df | 918 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
919 | next_pc += sizeof(struct binary_op); |
920 | PO; | |
921 | } | |
80c2a69a | 922 | OP(BYTECODE_OP_LT_STRING): |
07dfc1d0 MD |
923 | { |
924 | int res; | |
925 | ||
926 | res = (stack_strcmp(stack, top, "<") < 0); | |
d644d1df | 927 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 928 | estack_ax_v = res; |
d644d1df | 929 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
930 | next_pc += sizeof(struct binary_op); |
931 | PO; | |
932 | } | |
80c2a69a | 933 | OP(BYTECODE_OP_GE_STRING): |
07dfc1d0 MD |
934 | { |
935 | int res; | |
936 | ||
937 | res = (stack_strcmp(stack, top, ">=") >= 0); | |
d644d1df | 938 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 939 | estack_ax_v = res; |
d644d1df | 940 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
941 | next_pc += sizeof(struct binary_op); |
942 | PO; | |
943 | } | |
80c2a69a | 944 | OP(BYTECODE_OP_LE_STRING): |
07dfc1d0 MD |
945 | { |
946 | int res; | |
947 | ||
948 | res = (stack_strcmp(stack, top, "<=") <= 0); | |
d644d1df | 949 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 950 | estack_ax_v = res; |
d644d1df | 951 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
952 | next_pc += sizeof(struct binary_op); |
953 | PO; | |
954 | } | |
955 | ||
80c2a69a | 956 | OP(BYTECODE_OP_EQ_STAR_GLOB_STRING): |
02aca193 PP |
957 | { |
958 | int res; | |
959 | ||
960 | res = (stack_star_glob_match(stack, top, "==") == 0); | |
d644d1df | 961 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 962 | estack_ax_v = res; |
d644d1df | 963 | estack_ax_t = REG_S64; |
02aca193 PP |
964 | next_pc += sizeof(struct binary_op); |
965 | PO; | |
966 | } | |
80c2a69a | 967 | OP(BYTECODE_OP_NE_STAR_GLOB_STRING): |
02aca193 PP |
968 | { |
969 | int res; | |
970 | ||
971 | res = (stack_star_glob_match(stack, top, "!=") != 0); | |
d644d1df | 972 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 973 | estack_ax_v = res; |
d644d1df | 974 | estack_ax_t = REG_S64; |
02aca193 PP |
975 | next_pc += sizeof(struct binary_op); |
976 | PO; | |
977 | } | |
978 | ||
80c2a69a | 979 | OP(BYTECODE_OP_EQ_S64): |
07dfc1d0 MD |
980 | { |
981 | int res; | |
982 | ||
983 | res = (estack_bx_v == estack_ax_v); | |
d644d1df | 984 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 985 | estack_ax_v = res; |
d644d1df | 986 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
987 | next_pc += sizeof(struct binary_op); |
988 | PO; | |
989 | } | |
80c2a69a | 990 | OP(BYTECODE_OP_NE_S64): |
07dfc1d0 MD |
991 | { |
992 | int res; | |
993 | ||
994 | res = (estack_bx_v != estack_ax_v); | |
d644d1df | 995 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 996 | estack_ax_v = res; |
d644d1df | 997 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
998 | next_pc += sizeof(struct binary_op); |
999 | PO; | |
1000 | } | |
80c2a69a | 1001 | OP(BYTECODE_OP_GT_S64): |
07dfc1d0 MD |
1002 | { |
1003 | int res; | |
1004 | ||
1005 | res = (estack_bx_v > estack_ax_v); | |
d644d1df | 1006 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1007 | estack_ax_v = res; |
d644d1df | 1008 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1009 | next_pc += sizeof(struct binary_op); |
1010 | PO; | |
1011 | } | |
80c2a69a | 1012 | OP(BYTECODE_OP_LT_S64): |
07dfc1d0 MD |
1013 | { |
1014 | int res; | |
1015 | ||
1016 | res = (estack_bx_v < estack_ax_v); | |
d644d1df | 1017 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1018 | estack_ax_v = res; |
d644d1df | 1019 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1020 | next_pc += sizeof(struct binary_op); |
1021 | PO; | |
1022 | } | |
80c2a69a | 1023 | OP(BYTECODE_OP_GE_S64): |
07dfc1d0 MD |
1024 | { |
1025 | int res; | |
1026 | ||
1027 | res = (estack_bx_v >= estack_ax_v); | |
d644d1df | 1028 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1029 | estack_ax_v = res; |
d644d1df | 1030 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1031 | next_pc += sizeof(struct binary_op); |
1032 | PO; | |
1033 | } | |
80c2a69a | 1034 | OP(BYTECODE_OP_LE_S64): |
07dfc1d0 MD |
1035 | { |
1036 | int res; | |
1037 | ||
1038 | res = (estack_bx_v <= estack_ax_v); | |
d644d1df | 1039 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1040 | estack_ax_v = res; |
d644d1df | 1041 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1042 | next_pc += sizeof(struct binary_op); |
1043 | PO; | |
1044 | } | |
1045 | ||
80c2a69a FD |
1046 | OP(BYTECODE_OP_EQ_DOUBLE): |
1047 | OP(BYTECODE_OP_NE_DOUBLE): | |
1048 | OP(BYTECODE_OP_GT_DOUBLE): | |
1049 | OP(BYTECODE_OP_LT_DOUBLE): | |
1050 | OP(BYTECODE_OP_GE_DOUBLE): | |
1051 | OP(BYTECODE_OP_LE_DOUBLE): | |
07dfc1d0 MD |
1052 | { |
1053 | BUG_ON(1); | |
1054 | PO; | |
1055 | } | |
1056 | ||
1057 | /* Mixed S64-double binary comparators */ | |
80c2a69a FD |
1058 | OP(BYTECODE_OP_EQ_DOUBLE_S64): |
1059 | OP(BYTECODE_OP_NE_DOUBLE_S64): | |
1060 | OP(BYTECODE_OP_GT_DOUBLE_S64): | |
1061 | OP(BYTECODE_OP_LT_DOUBLE_S64): | |
1062 | OP(BYTECODE_OP_GE_DOUBLE_S64): | |
1063 | OP(BYTECODE_OP_LE_DOUBLE_S64): | |
1064 | OP(BYTECODE_OP_EQ_S64_DOUBLE): | |
1065 | OP(BYTECODE_OP_NE_S64_DOUBLE): | |
1066 | OP(BYTECODE_OP_GT_S64_DOUBLE): | |
1067 | OP(BYTECODE_OP_LT_S64_DOUBLE): | |
1068 | OP(BYTECODE_OP_GE_S64_DOUBLE): | |
1069 | OP(BYTECODE_OP_LE_S64_DOUBLE): | |
07dfc1d0 MD |
1070 | { |
1071 | BUG_ON(1); | |
1072 | PO; | |
1073 | } | |
80c2a69a | 1074 | OP(BYTECODE_OP_BIT_RSHIFT): |
e16c054b MD |
1075 | { |
1076 | int64_t res; | |
1077 | ||
d644d1df FD |
1078 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1079 | ret = -EINVAL; | |
1080 | goto end; | |
1081 | } | |
1082 | ||
ea13ec96 MD |
1083 | /* Catch undefined behavior. */ |
1084 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1085 | ret = -EINVAL; | |
1086 | goto end; | |
1087 | } | |
f8d42740 | 1088 | res = ((uint64_t) estack_bx_v >> (uint32_t) estack_ax_v); |
d644d1df | 1089 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
e16c054b | 1090 | estack_ax_v = res; |
1242217a | 1091 | estack_ax_t = REG_U64; |
e16c054b MD |
1092 | next_pc += sizeof(struct binary_op); |
1093 | PO; | |
1094 | } | |
80c2a69a | 1095 | OP(BYTECODE_OP_BIT_LSHIFT): |
e16c054b MD |
1096 | { |
1097 | int64_t res; | |
1098 | ||
d644d1df FD |
1099 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1100 | ret = -EINVAL; | |
1101 | goto end; | |
1102 | } | |
1103 | ||
ea13ec96 MD |
1104 | /* Catch undefined behavior. */ |
1105 | if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) { | |
1106 | ret = -EINVAL; | |
1107 | goto end; | |
1108 | } | |
f8d42740 | 1109 | res = ((uint64_t) estack_bx_v << (uint32_t) estack_ax_v); |
d644d1df | 1110 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
e16c054b | 1111 | estack_ax_v = res; |
1242217a | 1112 | estack_ax_t = REG_U64; |
e16c054b MD |
1113 | next_pc += sizeof(struct binary_op); |
1114 | PO; | |
1115 | } | |
80c2a69a | 1116 | OP(BYTECODE_OP_BIT_AND): |
3834b99f MD |
1117 | { |
1118 | int64_t res; | |
1119 | ||
d644d1df FD |
1120 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1121 | ret = -EINVAL; | |
1122 | goto end; | |
1123 | } | |
1124 | ||
f8d42740 | 1125 | res = ((uint64_t) estack_bx_v & (uint64_t) estack_ax_v); |
d644d1df | 1126 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1127 | estack_ax_v = res; |
1242217a | 1128 | estack_ax_t = REG_U64; |
3834b99f MD |
1129 | next_pc += sizeof(struct binary_op); |
1130 | PO; | |
1131 | } | |
80c2a69a | 1132 | OP(BYTECODE_OP_BIT_OR): |
3834b99f MD |
1133 | { |
1134 | int64_t res; | |
1135 | ||
d644d1df FD |
1136 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1137 | ret = -EINVAL; | |
1138 | goto end; | |
1139 | } | |
1140 | ||
f8d42740 | 1141 | res = ((uint64_t) estack_bx_v | (uint64_t) estack_ax_v); |
d644d1df | 1142 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1143 | estack_ax_v = res; |
1242217a | 1144 | estack_ax_t = REG_U64; |
3834b99f MD |
1145 | next_pc += sizeof(struct binary_op); |
1146 | PO; | |
1147 | } | |
80c2a69a | 1148 | OP(BYTECODE_OP_BIT_XOR): |
3834b99f MD |
1149 | { |
1150 | int64_t res; | |
1151 | ||
d644d1df FD |
1152 | if (!IS_INTEGER_REGISTER(estack_ax_t) || !IS_INTEGER_REGISTER(estack_bx_t)) { |
1153 | ret = -EINVAL; | |
1154 | goto end; | |
1155 | } | |
1156 | ||
f8d42740 | 1157 | res = ((uint64_t) estack_bx_v ^ (uint64_t) estack_ax_v); |
d644d1df | 1158 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1159 | estack_ax_v = res; |
1242217a | 1160 | estack_ax_t = REG_U64; |
3834b99f MD |
1161 | next_pc += sizeof(struct binary_op); |
1162 | PO; | |
1163 | } | |
07dfc1d0 MD |
1164 | |
1165 | /* unary */ | |
80c2a69a FD |
1166 | OP(BYTECODE_OP_UNARY_PLUS): |
1167 | OP(BYTECODE_OP_UNARY_MINUS): | |
1168 | OP(BYTECODE_OP_UNARY_NOT): | |
1169 | printk(KERN_WARNING "LTTng: bytecode: unsupported non-specialized bytecode op %u\n", | |
1170 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
1171 | ret = -EINVAL; |
1172 | goto end; | |
1173 | ||
1174 | ||
80c2a69a | 1175 | OP(BYTECODE_OP_UNARY_BIT_NOT): |
e16c054b | 1176 | { |
f8d42740 | 1177 | estack_ax_v = ~(uint64_t) estack_ax_v; |
d644d1df | 1178 | estack_ax_t = REG_S64; |
e16c054b MD |
1179 | next_pc += sizeof(struct unary_op); |
1180 | PO; | |
1181 | } | |
1182 | ||
80c2a69a | 1183 | OP(BYTECODE_OP_UNARY_PLUS_S64): |
07dfc1d0 MD |
1184 | { |
1185 | next_pc += sizeof(struct unary_op); | |
1186 | PO; | |
1187 | } | |
80c2a69a | 1188 | OP(BYTECODE_OP_UNARY_MINUS_S64): |
07dfc1d0 MD |
1189 | { |
1190 | estack_ax_v = -estack_ax_v; | |
d644d1df | 1191 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1192 | next_pc += sizeof(struct unary_op); |
1193 | PO; | |
1194 | } | |
80c2a69a FD |
1195 | OP(BYTECODE_OP_UNARY_PLUS_DOUBLE): |
1196 | OP(BYTECODE_OP_UNARY_MINUS_DOUBLE): | |
07dfc1d0 MD |
1197 | { |
1198 | BUG_ON(1); | |
1199 | PO; | |
1200 | } | |
80c2a69a | 1201 | OP(BYTECODE_OP_UNARY_NOT_S64): |
07dfc1d0 MD |
1202 | { |
1203 | estack_ax_v = !estack_ax_v; | |
d644d1df | 1204 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1205 | next_pc += sizeof(struct unary_op); |
1206 | PO; | |
1207 | } | |
80c2a69a | 1208 | OP(BYTECODE_OP_UNARY_NOT_DOUBLE): |
07dfc1d0 MD |
1209 | { |
1210 | BUG_ON(1); | |
1211 | PO; | |
1212 | } | |
1213 | ||
1214 | /* logical */ | |
80c2a69a | 1215 | OP(BYTECODE_OP_AND): |
07dfc1d0 MD |
1216 | { |
1217 | struct logical_op *insn = (struct logical_op *) pc; | |
1218 | ||
1219 | /* If AX is 0, skip and evaluate to 0 */ | |
1220 | if (unlikely(estack_ax_v == 0)) { | |
1221 | dbg_printk("Jumping to bytecode offset %u\n", | |
1222 | (unsigned int) insn->skip_offset); | |
1223 | next_pc = start_pc + insn->skip_offset; | |
1224 | } else { | |
1225 | /* Pop 1 when jump not taken */ | |
d644d1df | 1226 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1227 | next_pc += sizeof(struct logical_op); |
1228 | } | |
1229 | PO; | |
1230 | } | |
80c2a69a | 1231 | OP(BYTECODE_OP_OR): |
07dfc1d0 MD |
1232 | { |
1233 | struct logical_op *insn = (struct logical_op *) pc; | |
1234 | ||
1235 | /* If AX is nonzero, skip and evaluate to 1 */ | |
1236 | ||
1237 | if (unlikely(estack_ax_v != 0)) { | |
1238 | estack_ax_v = 1; | |
1239 | dbg_printk("Jumping to bytecode offset %u\n", | |
1240 | (unsigned int) insn->skip_offset); | |
1241 | next_pc = start_pc + insn->skip_offset; | |
1242 | } else { | |
1243 | /* Pop 1 when jump not taken */ | |
d644d1df | 1244 | estack_pop(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1245 | next_pc += sizeof(struct logical_op); |
1246 | } | |
1247 | PO; | |
1248 | } | |
1249 | ||
1250 | ||
1251 | /* load field ref */ | |
80c2a69a | 1252 | OP(BYTECODE_OP_LOAD_FIELD_REF_STRING): |
07dfc1d0 MD |
1253 | { |
1254 | struct load_op *insn = (struct load_op *) pc; | |
1255 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1256 | ||
1257 | dbg_printk("load field ref offset %u type string\n", | |
1258 | ref->offset); | |
d644d1df | 1259 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1260 | estack_ax(stack, top)->u.s.str = |
03cb0cdd | 1261 | *(const char * const *) &interpreter_stack_data[ref->offset]; |
07dfc1d0 | 1262 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { |
80c2a69a | 1263 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
07dfc1d0 MD |
1264 | ret = -EINVAL; |
1265 | goto end; | |
1266 | } | |
cbc19040 | 1267 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1268 | estack_ax(stack, top)->u.s.literal_type = |
1269 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1270 | estack_ax(stack, top)->u.s.user = 0; |
d644d1df | 1271 | estack_ax(stack, top)->type = REG_STRING; |
07dfc1d0 MD |
1272 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
1273 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1274 | PO; | |
1275 | } | |
1276 | ||
80c2a69a | 1277 | OP(BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE): |
07dfc1d0 MD |
1278 | { |
1279 | struct load_op *insn = (struct load_op *) pc; | |
1280 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1281 | ||
1282 | dbg_printk("load field ref offset %u type sequence\n", | |
1283 | ref->offset); | |
d644d1df | 1284 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1285 | estack_ax(stack, top)->u.s.seq_len = |
03cb0cdd | 1286 | *(unsigned long *) &interpreter_stack_data[ref->offset]; |
07dfc1d0 | 1287 | estack_ax(stack, top)->u.s.str = |
03cb0cdd | 1288 | *(const char **) (&interpreter_stack_data[ref->offset |
07dfc1d0 MD |
1289 | + sizeof(unsigned long)]); |
1290 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
80c2a69a | 1291 | dbg_printk("Bytecode warning: loading a NULL sequence.\n"); |
07dfc1d0 MD |
1292 | ret = -EINVAL; |
1293 | goto end; | |
1294 | } | |
02aca193 PP |
1295 | estack_ax(stack, top)->u.s.literal_type = |
1296 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1297 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1298 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); |
1299 | PO; | |
1300 | } | |
1301 | ||
80c2a69a | 1302 | OP(BYTECODE_OP_LOAD_FIELD_REF_S64): |
07dfc1d0 MD |
1303 | { |
1304 | struct load_op *insn = (struct load_op *) pc; | |
1305 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1306 | ||
1307 | dbg_printk("load field ref offset %u type s64\n", | |
1308 | ref->offset); | |
d644d1df | 1309 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1310 | estack_ax_v = |
03cb0cdd | 1311 | ((struct literal_numeric *) &interpreter_stack_data[ref->offset])->v; |
d644d1df | 1312 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1313 | dbg_printk("ref load s64 %lld\n", |
1314 | (long long) estack_ax_v); | |
1315 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1316 | PO; | |
1317 | } | |
1318 | ||
80c2a69a | 1319 | OP(BYTECODE_OP_LOAD_FIELD_REF_DOUBLE): |
07dfc1d0 MD |
1320 | { |
1321 | BUG_ON(1); | |
1322 | PO; | |
1323 | } | |
1324 | ||
1325 | /* load from immediate operand */ | |
80c2a69a | 1326 | OP(BYTECODE_OP_LOAD_STRING): |
07dfc1d0 MD |
1327 | { |
1328 | struct load_op *insn = (struct load_op *) pc; | |
1329 | ||
1330 | dbg_printk("load string %s\n", insn->data); | |
d644d1df | 1331 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1332 | estack_ax(stack, top)->u.s.str = insn->data; |
cbc19040 | 1333 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1334 | estack_ax(stack, top)->u.s.literal_type = |
1335 | ESTACK_STRING_LITERAL_TYPE_PLAIN; | |
1336 | estack_ax(stack, top)->u.s.user = 0; | |
1337 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; | |
1338 | PO; | |
1339 | } | |
1340 | ||
80c2a69a | 1341 | OP(BYTECODE_OP_LOAD_STAR_GLOB_STRING): |
02aca193 PP |
1342 | { |
1343 | struct load_op *insn = (struct load_op *) pc; | |
1344 | ||
1345 | dbg_printk("load globbing pattern %s\n", insn->data); | |
d644d1df | 1346 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
02aca193 | 1347 | estack_ax(stack, top)->u.s.str = insn->data; |
cbc19040 | 1348 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1349 | estack_ax(stack, top)->u.s.literal_type = |
1350 | ESTACK_STRING_LITERAL_TYPE_STAR_GLOB; | |
f127e61e | 1351 | estack_ax(stack, top)->u.s.user = 0; |
07dfc1d0 MD |
1352 | next_pc += sizeof(struct load_op) + strlen(insn->data) + 1; |
1353 | PO; | |
1354 | } | |
1355 | ||
80c2a69a | 1356 | OP(BYTECODE_OP_LOAD_S64): |
07dfc1d0 MD |
1357 | { |
1358 | struct load_op *insn = (struct load_op *) pc; | |
1359 | ||
d644d1df | 1360 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1361 | estack_ax_v = ((struct literal_numeric *) insn->data)->v; |
d644d1df | 1362 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1363 | dbg_printk("load s64 %lld\n", |
1364 | (long long) estack_ax_v); | |
1365 | next_pc += sizeof(struct load_op) | |
1366 | + sizeof(struct literal_numeric); | |
1367 | PO; | |
1368 | } | |
1369 | ||
80c2a69a | 1370 | OP(BYTECODE_OP_LOAD_DOUBLE): |
07dfc1d0 MD |
1371 | { |
1372 | BUG_ON(1); | |
1373 | PO; | |
1374 | } | |
1375 | ||
1376 | /* cast */ | |
80c2a69a FD |
1377 | OP(BYTECODE_OP_CAST_TO_S64): |
1378 | printk(KERN_WARNING "LTTng: bytecode: unsupported non-specialized bytecode op %u\n", | |
1379 | (unsigned int) *(bytecode_opcode_t *) pc); | |
07dfc1d0 MD |
1380 | ret = -EINVAL; |
1381 | goto end; | |
1382 | ||
80c2a69a | 1383 | OP(BYTECODE_OP_CAST_DOUBLE_TO_S64): |
07dfc1d0 MD |
1384 | { |
1385 | BUG_ON(1); | |
1386 | PO; | |
1387 | } | |
1388 | ||
80c2a69a | 1389 | OP(BYTECODE_OP_CAST_NOP): |
07dfc1d0 MD |
1390 | { |
1391 | next_pc += sizeof(struct cast_op); | |
1392 | PO; | |
1393 | } | |
1394 | ||
1395 | /* get context ref */ | |
80c2a69a | 1396 | OP(BYTECODE_OP_GET_CONTEXT_REF_STRING): |
07dfc1d0 MD |
1397 | { |
1398 | struct load_op *insn = (struct load_op *) pc; | |
1399 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1400 | struct lttng_ctx_field *ctx_field; | |
1401 | union lttng_ctx_value v; | |
1402 | ||
1403 | dbg_printk("get context ref offset %u type string\n", | |
1404 | ref->offset); | |
1405 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1406 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
d644d1df | 1407 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 MD |
1408 | estack_ax(stack, top)->u.s.str = v.str; |
1409 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
80c2a69a | 1410 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
07dfc1d0 MD |
1411 | ret = -EINVAL; |
1412 | goto end; | |
1413 | } | |
cbc19040 | 1414 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1415 | estack_ax(stack, top)->u.s.literal_type = |
1416 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1417 | estack_ax(stack, top)->u.s.user = 0; |
d644d1df | 1418 | estack_ax(stack, top)->type = REG_STRING; |
07dfc1d0 MD |
1419 | dbg_printk("ref get context string %s\n", estack_ax(stack, top)->u.s.str); |
1420 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1421 | PO; | |
1422 | } | |
1423 | ||
80c2a69a | 1424 | OP(BYTECODE_OP_GET_CONTEXT_REF_S64): |
07dfc1d0 MD |
1425 | { |
1426 | struct load_op *insn = (struct load_op *) pc; | |
1427 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1428 | struct lttng_ctx_field *ctx_field; | |
1429 | union lttng_ctx_value v; | |
1430 | ||
1431 | dbg_printk("get context ref offset %u type s64\n", | |
1432 | ref->offset); | |
1433 | ctx_field = <tng_static_ctx->fields[ref->offset]; | |
79150a49 | 1434 | ctx_field->get_value(ctx_field, lttng_probe_ctx, &v); |
d644d1df | 1435 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
07dfc1d0 | 1436 | estack_ax_v = v.s64; |
d644d1df | 1437 | estack_ax_t = REG_S64; |
07dfc1d0 MD |
1438 | dbg_printk("ref get context s64 %lld\n", |
1439 | (long long) estack_ax_v); | |
1440 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1441 | PO; | |
1442 | } | |
1443 | ||
80c2a69a | 1444 | OP(BYTECODE_OP_GET_CONTEXT_REF_DOUBLE): |
07dfc1d0 MD |
1445 | { |
1446 | BUG_ON(1); | |
1447 | PO; | |
1448 | } | |
1449 | ||
f127e61e | 1450 | /* load userspace field ref */ |
80c2a69a | 1451 | OP(BYTECODE_OP_LOAD_FIELD_REF_USER_STRING): |
f127e61e MD |
1452 | { |
1453 | struct load_op *insn = (struct load_op *) pc; | |
1454 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1455 | ||
1456 | dbg_printk("load field ref offset %u type user string\n", | |
1457 | ref->offset); | |
d644d1df | 1458 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
5b4ad89f | 1459 | estack_ax(stack, top)->u.s.user_str = |
03cb0cdd | 1460 | *(const char * const *) &interpreter_stack_data[ref->offset]; |
f127e61e | 1461 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { |
80c2a69a | 1462 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
f127e61e MD |
1463 | ret = -EINVAL; |
1464 | goto end; | |
1465 | } | |
cbc19040 | 1466 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
02aca193 PP |
1467 | estack_ax(stack, top)->u.s.literal_type = |
1468 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e | 1469 | estack_ax(stack, top)->u.s.user = 1; |
d644d1df | 1470 | estack_ax(stack, top)->type = REG_STRING; |
f127e61e MD |
1471 | dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str); |
1472 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1473 | PO; | |
1474 | } | |
1475 | ||
80c2a69a | 1476 | OP(BYTECODE_OP_LOAD_FIELD_REF_USER_SEQUENCE): |
f127e61e MD |
1477 | { |
1478 | struct load_op *insn = (struct load_op *) pc; | |
1479 | struct field_ref *ref = (struct field_ref *) insn->data; | |
1480 | ||
1481 | dbg_printk("load field ref offset %u type user sequence\n", | |
1482 | ref->offset); | |
d644d1df | 1483 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
f127e61e | 1484 | estack_ax(stack, top)->u.s.seq_len = |
03cb0cdd | 1485 | *(unsigned long *) &interpreter_stack_data[ref->offset]; |
5b4ad89f | 1486 | estack_ax(stack, top)->u.s.user_str = |
03cb0cdd | 1487 | *(const char **) (&interpreter_stack_data[ref->offset |
f127e61e MD |
1488 | + sizeof(unsigned long)]); |
1489 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
80c2a69a | 1490 | dbg_printk("Bytecode warning: loading a NULL sequence.\n"); |
f127e61e MD |
1491 | ret = -EINVAL; |
1492 | goto end; | |
1493 | } | |
02aca193 PP |
1494 | estack_ax(stack, top)->u.s.literal_type = |
1495 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
f127e61e MD |
1496 | estack_ax(stack, top)->u.s.user = 1; |
1497 | next_pc += sizeof(struct load_op) + sizeof(struct field_ref); | |
1498 | PO; | |
1499 | } | |
1500 | ||
80c2a69a | 1501 | OP(BYTECODE_OP_GET_CONTEXT_ROOT): |
3834b99f MD |
1502 | { |
1503 | dbg_printk("op get context root\n"); | |
d644d1df | 1504 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
3834b99f MD |
1505 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_CONTEXT; |
1506 | /* "field" only needed for variants. */ | |
1507 | estack_ax(stack, top)->u.ptr.field = NULL; | |
d644d1df | 1508 | estack_ax(stack, top)->type = REG_PTR; |
3834b99f MD |
1509 | next_pc += sizeof(struct load_op); |
1510 | PO; | |
1511 | } | |
1512 | ||
80c2a69a | 1513 | OP(BYTECODE_OP_GET_APP_CONTEXT_ROOT): |
3834b99f MD |
1514 | { |
1515 | BUG_ON(1); | |
1516 | PO; | |
1517 | } | |
1518 | ||
80c2a69a | 1519 | OP(BYTECODE_OP_GET_PAYLOAD_ROOT): |
3834b99f MD |
1520 | { |
1521 | dbg_printk("op get app payload root\n"); | |
d644d1df | 1522 | estack_push(stack, top, ax, bx, ax_t, bx_t); |
3834b99f | 1523 | estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_PAYLOAD; |
03cb0cdd | 1524 | estack_ax(stack, top)->u.ptr.ptr = interpreter_stack_data; |
3834b99f MD |
1525 | /* "field" only needed for variants. */ |
1526 | estack_ax(stack, top)->u.ptr.field = NULL; | |
d644d1df | 1527 | estack_ax(stack, top)->type = REG_PTR; |
3834b99f MD |
1528 | next_pc += sizeof(struct load_op); |
1529 | PO; | |
1530 | } | |
1531 | ||
80c2a69a | 1532 | OP(BYTECODE_OP_GET_SYMBOL): |
3834b99f MD |
1533 | { |
1534 | dbg_printk("op get symbol\n"); | |
1535 | switch (estack_ax(stack, top)->u.ptr.type) { | |
1536 | case LOAD_OBJECT: | |
80c2a69a | 1537 | printk(KERN_WARNING "LTTng: bytecode: Nested fields not implemented yet.\n"); |
3834b99f MD |
1538 | ret = -EINVAL; |
1539 | goto end; | |
1540 | case LOAD_ROOT_CONTEXT: | |
1541 | case LOAD_ROOT_APP_CONTEXT: | |
1542 | case LOAD_ROOT_PAYLOAD: | |
1543 | /* | |
1544 | * symbol lookup is performed by | |
1545 | * specialization. | |
1546 | */ | |
1547 | ret = -EINVAL; | |
1548 | goto end; | |
1549 | } | |
1550 | next_pc += sizeof(struct load_op) + sizeof(struct get_symbol); | |
1551 | PO; | |
1552 | } | |
1553 | ||
80c2a69a | 1554 | OP(BYTECODE_OP_GET_SYMBOL_FIELD): |
3834b99f MD |
1555 | { |
1556 | /* | |
1557 | * Used for first variant encountered in a | |
1558 | * traversal. Variants are not implemented yet. | |
1559 | */ | |
1560 | ret = -EINVAL; | |
1561 | goto end; | |
1562 | } | |
1563 | ||
80c2a69a | 1564 | OP(BYTECODE_OP_GET_INDEX_U16): |
3834b99f MD |
1565 | { |
1566 | struct load_op *insn = (struct load_op *) pc; | |
1567 | struct get_index_u16 *index = (struct get_index_u16 *) insn->data; | |
1568 | ||
1569 | dbg_printk("op get index u16\n"); | |
1570 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1571 | if (ret) | |
1572 | goto end; | |
1573 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1574 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1575 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16); |
1576 | PO; | |
1577 | } | |
1578 | ||
80c2a69a | 1579 | OP(BYTECODE_OP_GET_INDEX_U64): |
3834b99f MD |
1580 | { |
1581 | struct load_op *insn = (struct load_op *) pc; | |
1582 | struct get_index_u64 *index = (struct get_index_u64 *) insn->data; | |
1583 | ||
1584 | dbg_printk("op get index u64\n"); | |
1585 | ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top)); | |
1586 | if (ret) | |
1587 | goto end; | |
1588 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1589 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1590 | next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64); |
1591 | PO; | |
1592 | } | |
1593 | ||
80c2a69a | 1594 | OP(BYTECODE_OP_LOAD_FIELD): |
3834b99f MD |
1595 | { |
1596 | dbg_printk("op load field\n"); | |
1597 | ret = dynamic_load_field(estack_ax(stack, top)); | |
1598 | if (ret) | |
1599 | goto end; | |
1600 | estack_ax_v = estack_ax(stack, top)->u.v; | |
d644d1df | 1601 | estack_ax_t = estack_ax(stack, top)->type; |
3834b99f MD |
1602 | next_pc += sizeof(struct load_op); |
1603 | PO; | |
1604 | } | |
1605 | ||
80c2a69a | 1606 | OP(BYTECODE_OP_LOAD_FIELD_S8): |
3834b99f MD |
1607 | { |
1608 | dbg_printk("op load field s8\n"); | |
1609 | ||
1610 | estack_ax_v = *(int8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1611 | estack_ax_t = REG_S64; |
3834b99f MD |
1612 | next_pc += sizeof(struct load_op); |
1613 | PO; | |
1614 | } | |
80c2a69a | 1615 | OP(BYTECODE_OP_LOAD_FIELD_S16): |
3834b99f MD |
1616 | { |
1617 | dbg_printk("op load field s16\n"); | |
1618 | ||
1619 | estack_ax_v = *(int16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1620 | estack_ax_t = REG_S64; |
3834b99f MD |
1621 | next_pc += sizeof(struct load_op); |
1622 | PO; | |
1623 | } | |
80c2a69a | 1624 | OP(BYTECODE_OP_LOAD_FIELD_S32): |
3834b99f MD |
1625 | { |
1626 | dbg_printk("op load field s32\n"); | |
1627 | ||
1628 | estack_ax_v = *(int32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1629 | estack_ax_t = REG_S64; |
3834b99f MD |
1630 | next_pc += sizeof(struct load_op); |
1631 | PO; | |
1632 | } | |
80c2a69a | 1633 | OP(BYTECODE_OP_LOAD_FIELD_S64): |
3834b99f MD |
1634 | { |
1635 | dbg_printk("op load field s64\n"); | |
1636 | ||
1637 | estack_ax_v = *(int64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1638 | estack_ax_t = REG_S64; |
3834b99f MD |
1639 | next_pc += sizeof(struct load_op); |
1640 | PO; | |
1641 | } | |
80c2a69a | 1642 | OP(BYTECODE_OP_LOAD_FIELD_U8): |
3834b99f MD |
1643 | { |
1644 | dbg_printk("op load field u8\n"); | |
1645 | ||
1646 | estack_ax_v = *(uint8_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1647 | estack_ax_t = REG_S64; |
3834b99f MD |
1648 | next_pc += sizeof(struct load_op); |
1649 | PO; | |
1650 | } | |
80c2a69a | 1651 | OP(BYTECODE_OP_LOAD_FIELD_U16): |
3834b99f MD |
1652 | { |
1653 | dbg_printk("op load field u16\n"); | |
1654 | ||
1655 | estack_ax_v = *(uint16_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1656 | estack_ax_t = REG_S64; |
3834b99f MD |
1657 | next_pc += sizeof(struct load_op); |
1658 | PO; | |
1659 | } | |
80c2a69a | 1660 | OP(BYTECODE_OP_LOAD_FIELD_U32): |
3834b99f MD |
1661 | { |
1662 | dbg_printk("op load field u32\n"); | |
1663 | ||
1664 | estack_ax_v = *(uint32_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1665 | estack_ax_t = REG_S64; |
3834b99f MD |
1666 | next_pc += sizeof(struct load_op); |
1667 | PO; | |
1668 | } | |
80c2a69a | 1669 | OP(BYTECODE_OP_LOAD_FIELD_U64): |
3834b99f MD |
1670 | { |
1671 | dbg_printk("op load field u64\n"); | |
1672 | ||
1673 | estack_ax_v = *(uint64_t *) estack_ax(stack, top)->u.ptr.ptr; | |
d644d1df | 1674 | estack_ax_t = REG_S64; |
3834b99f MD |
1675 | next_pc += sizeof(struct load_op); |
1676 | PO; | |
1677 | } | |
80c2a69a | 1678 | OP(BYTECODE_OP_LOAD_FIELD_DOUBLE): |
3834b99f MD |
1679 | { |
1680 | ret = -EINVAL; | |
1681 | goto end; | |
1682 | } | |
1683 | ||
80c2a69a | 1684 | OP(BYTECODE_OP_LOAD_FIELD_STRING): |
3834b99f MD |
1685 | { |
1686 | const char *str; | |
1687 | ||
1688 | dbg_printk("op load field string\n"); | |
1689 | str = (const char *) estack_ax(stack, top)->u.ptr.ptr; | |
1690 | estack_ax(stack, top)->u.s.str = str; | |
1691 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
80c2a69a | 1692 | dbg_printk("Bytecode warning: loading a NULL string.\n"); |
3834b99f MD |
1693 | ret = -EINVAL; |
1694 | goto end; | |
1695 | } | |
4efe037b | 1696 | estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX; |
3834b99f MD |
1697 | estack_ax(stack, top)->u.s.literal_type = |
1698 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 1699 | estack_ax(stack, top)->type = REG_STRING; |
3834b99f MD |
1700 | next_pc += sizeof(struct load_op); |
1701 | PO; | |
1702 | } | |
1703 | ||
80c2a69a | 1704 | OP(BYTECODE_OP_LOAD_FIELD_SEQUENCE): |
3834b99f MD |
1705 | { |
1706 | const char *ptr; | |
1707 | ||
1708 | dbg_printk("op load field string sequence\n"); | |
1709 | ptr = estack_ax(stack, top)->u.ptr.ptr; | |
1710 | estack_ax(stack, top)->u.s.seq_len = *(unsigned long *) ptr; | |
1711 | estack_ax(stack, top)->u.s.str = *(const char **) (ptr + sizeof(unsigned long)); | |
1712 | if (unlikely(!estack_ax(stack, top)->u.s.str)) { | |
80c2a69a | 1713 | dbg_printk("Bytecode warning: loading a NULL sequence.\n"); |
3834b99f MD |
1714 | ret = -EINVAL; |
1715 | goto end; | |
1716 | } | |
1717 | estack_ax(stack, top)->u.s.literal_type = | |
1718 | ESTACK_STRING_LITERAL_TYPE_NONE; | |
d644d1df | 1719 | estack_ax(stack, top)->type = REG_STRING; |
3834b99f MD |
1720 | next_pc += sizeof(struct load_op); |
1721 | PO; | |
1722 | } | |
1723 | ||
07dfc1d0 MD |
1724 | END_OP |
1725 | end: | |
a93d4e71 | 1726 | /* Return _DISCARD on error. */ |
07dfc1d0 | 1727 | if (ret) |
80c2a69a | 1728 | return LTTNG_INTERPRETER_DISCARD; |
03cb0cdd FD |
1729 | |
1730 | if (output) { | |
1731 | return lttng_bytecode_interpret_format_output( | |
1732 | estack_ax(stack, top), output); | |
1733 | } | |
1734 | ||
07dfc1d0 MD |
1735 | return retval; |
1736 | } | |
03cb0cdd FD |
1737 | LTTNG_STACK_FRAME_NON_STANDARD(bytecode_interpret); |
1738 | ||
80c2a69a | 1739 | uint64_t lttng_bytecode_filter_interpret(void *filter_data, |
03cb0cdd FD |
1740 | struct lttng_probe_ctx *lttng_probe_ctx, |
1741 | const char *filter_stack_data) | |
1742 | { | |
1743 | return bytecode_interpret(filter_data, lttng_probe_ctx, | |
1744 | filter_stack_data, NULL); | |
1745 | } | |
07dfc1d0 MD |
1746 | |
1747 | #undef START_OP | |
1748 | #undef OP | |
1749 | #undef PO | |
1750 | #undef END_OP |