1 /* SPDX-License-Identifier: MIT
3 * lttng-filter-interpreter.c
5 * LTTng modules filter interpreter.
7 * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
10 #include <wrapper/compiler_attributes.h>
11 #include <wrapper/uaccess.h>
12 #include <wrapper/objtool.h>
13 #include <wrapper/types.h>
14 #include <linux/swab.h>
16 #include <lttng-filter.h>
17 #include <lttng-string-utils.h>
19 LTTNG_STACK_FRAME_NON_STANDARD(lttng_filter_interpret_bytecode
);
22 * get_char should be called with page fault handler disabled if it is expected
23 * to handle user-space read.
26 char get_char(const struct estack_entry
*reg
, size_t offset
)
28 if (unlikely(offset
>= reg
->u
.s
.seq_len
))
33 /* Handle invalid access as end of string. */
34 if (unlikely(!lttng_access_ok(VERIFY_READ
,
35 reg
->u
.s
.user_str
+ offset
,
38 /* Handle fault (nonzero return value) as end of string. */
39 if (unlikely(__copy_from_user_inatomic(&c
,
40 reg
->u
.s
.user_str
+ offset
,
45 return reg
->u
.s
.str
[offset
];
51 * -2: unknown escape char.
55 int parse_char(struct estack_entry
*reg
, char *c
, size_t *offset
)
60 *c
= get_char(reg
, *offset
);
76 char get_char_at_cb(size_t at
, void *data
)
78 return get_char(data
, at
);
82 int stack_star_glob_match(struct estack
*stack
, int top
, const char *cmp_type
)
84 bool has_user
= false;
86 struct estack_entry
*pattern_reg
;
87 struct estack_entry
*candidate_reg
;
89 /* Disable the page fault handler when reading from userspace. */
90 if (estack_bx(stack
, top
)->u
.s
.user
91 || estack_ax(stack
, top
)->u
.s
.user
) {
96 /* Find out which side is the pattern vs. the candidate. */
97 if (estack_ax(stack
, top
)->u
.s
.literal_type
== ESTACK_STRING_LITERAL_TYPE_STAR_GLOB
) {
98 pattern_reg
= estack_ax(stack
, top
);
99 candidate_reg
= estack_bx(stack
, top
);
101 pattern_reg
= estack_bx(stack
, top
);
102 candidate_reg
= estack_ax(stack
, top
);
105 /* Perform the match operation. */
106 result
= !strutils_star_glob_match_char_cb(get_char_at_cb
,
107 pattern_reg
, get_char_at_cb
, candidate_reg
);
115 int stack_strcmp(struct estack
*stack
, int top
, const char *cmp_type
)
117 size_t offset_bx
= 0, offset_ax
= 0;
118 int diff
, has_user
= 0;
120 if (estack_bx(stack
, top
)->u
.s
.user
121 || estack_ax(stack
, top
)->u
.s
.user
) {
129 char char_bx
, char_ax
;
131 char_bx
= get_char(estack_bx(stack
, top
), offset_bx
);
132 char_ax
= get_char(estack_ax(stack
, top
), offset_ax
);
134 if (unlikely(char_bx
== '\0')) {
135 if (char_ax
== '\0') {
139 if (estack_ax(stack
, top
)->u
.s
.literal_type
==
140 ESTACK_STRING_LITERAL_TYPE_PLAIN
) {
141 ret
= parse_char(estack_ax(stack
, top
),
142 &char_ax
, &offset_ax
);
152 if (unlikely(char_ax
== '\0')) {
153 if (estack_bx(stack
, top
)->u
.s
.literal_type
==
154 ESTACK_STRING_LITERAL_TYPE_PLAIN
) {
155 ret
= parse_char(estack_bx(stack
, top
),
156 &char_bx
, &offset_bx
);
165 if (estack_bx(stack
, top
)->u
.s
.literal_type
==
166 ESTACK_STRING_LITERAL_TYPE_PLAIN
) {
167 ret
= parse_char(estack_bx(stack
, top
),
168 &char_bx
, &offset_bx
);
172 } else if (ret
== -2) {
175 /* else compare both char */
177 if (estack_ax(stack
, top
)->u
.s
.literal_type
==
178 ESTACK_STRING_LITERAL_TYPE_PLAIN
) {
179 ret
= parse_char(estack_ax(stack
, top
),
180 &char_ax
, &offset_ax
);
184 } else if (ret
== -2) {
201 diff
= char_bx
- char_ax
;
213 uint64_t lttng_filter_false(void *filter_data
,
214 struct lttng_probe_ctx
*lttng_probe_ctx
,
215 const char *filter_stack_data
)
220 #ifdef INTERPRETER_USE_SWITCH
223 * Fallback for compilers that do not support taking address of labels.
227 start_pc = &bytecode->data[0]; \
228 for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; \
230 dbg_printk("Executing op %s (%u)\n", \
231 lttng_filter_print_op((unsigned int) *(filter_opcode_t *) pc), \
232 (unsigned int) *(filter_opcode_t *) pc); \
233 switch (*(filter_opcode_t *) pc) {
235 #define OP(name) case name
245 * Dispatch-table based interpreter.
249 start_pc = &bytecode->code[0]; \
250 pc = next_pc = start_pc; \
251 if (unlikely(pc - start_pc >= bytecode->len)) \
253 goto *dispatch[*(filter_opcode_t *) pc];
260 goto *dispatch[*(filter_opcode_t *) pc];
266 static int context_get_index(struct lttng_probe_ctx
*lttng_probe_ctx
,
267 struct load_ptr
*ptr
,
271 struct lttng_ctx_field
*ctx_field
;
272 struct lttng_event_field
*field
;
273 union lttng_ctx_value v
;
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. */
281 switch (field
->type
.atype
) {
283 ctx_field
->get_value(ctx_field
, lttng_probe_ctx
, &v
);
284 if (field
->type
.u
.basic
.integer
.signedness
) {
285 ptr
->object_type
= OBJECT_TYPE_S64
;
287 ptr
->ptr
= &ptr
->u
.s64
;
289 ptr
->object_type
= OBJECT_TYPE_U64
;
290 ptr
->u
.u64
= v
.s64
; /* Cast. */
291 ptr
->ptr
= &ptr
->u
.u64
;
293 ptr
->rev_bo
= field
->type
.u
.basic
.integer
.reverse_byte_order
;
297 const struct lttng_integer_type
*itype
=
298 &field
->type
.u
.basic
.enumeration
.container_type
;
300 ctx_field
->get_value(ctx_field
, lttng_probe_ctx
, &v
);
301 if (itype
->signedness
) {
302 ptr
->object_type
= OBJECT_TYPE_S64
;
304 ptr
->ptr
= &ptr
->u
.s64
;
306 ptr
->object_type
= OBJECT_TYPE_U64
;
307 ptr
->u
.u64
= v
.s64
; /* Cast. */
308 ptr
->ptr
= &ptr
->u
.u64
;
310 ptr
->rev_bo
= itype
->reverse_byte_order
;
314 if (field
->type
.u
.array
.elem_type
.atype
!= atype_integer
) {
315 printk(KERN_WARNING
"Array nesting only supports integer types.\n");
318 if (field
->type
.u
.array
.elem_type
.u
.basic
.integer
.encoding
== lttng_encode_none
) {
319 printk(KERN_WARNING
"Only string arrays are supported for contexts.\n");
322 ptr
->object_type
= OBJECT_TYPE_STRING
;
323 ctx_field
->get_value(ctx_field
, lttng_probe_ctx
, &v
);
327 if (field
->type
.u
.sequence
.elem_type
.atype
!= atype_integer
) {
328 printk(KERN_WARNING
"Sequence nesting only supports integer types.\n");
331 if (field
->type
.u
.sequence
.elem_type
.u
.basic
.integer
.encoding
== lttng_encode_none
) {
332 printk(KERN_WARNING
"Only string sequences are supported for contexts.\n");
335 ptr
->object_type
= OBJECT_TYPE_STRING
;
336 ctx_field
->get_value(ctx_field
, lttng_probe_ctx
, &v
);
339 case atype_array_bitfield
:
340 printk(KERN_WARNING
"Bitfield array type is not supported.\n");
342 case atype_sequence_bitfield
:
343 printk(KERN_WARNING
"Bitfield sequence type is not supported.\n");
346 ptr
->object_type
= OBJECT_TYPE_STRING
;
347 ctx_field
->get_value(ctx_field
, lttng_probe_ctx
, &v
);
351 printk(KERN_WARNING
"Structure type cannot be loaded.\n");
354 printk(KERN_WARNING
"Unknown type: %d", (int) field
->type
.atype
);
360 static int dynamic_get_index(struct lttng_probe_ctx
*lttng_probe_ctx
,
361 struct bytecode_runtime
*runtime
,
362 uint64_t index
, struct estack_entry
*stack_top
)
365 const struct filter_get_index_data
*gid
;
368 * Types nested within variants need to perform dynamic lookup
369 * based on the field descriptions. LTTng-UST does not implement
372 if (stack_top
->u
.ptr
.field
)
374 gid
= (const struct filter_get_index_data
*) &runtime
->data
[index
];
375 switch (stack_top
->u
.ptr
.type
) {
377 switch (stack_top
->u
.ptr
.object_type
) {
378 case OBJECT_TYPE_ARRAY
:
382 WARN_ON_ONCE(gid
->offset
>= gid
->array_len
);
383 /* Skip count (unsigned long) */
384 ptr
= *(const char **) (stack_top
->u
.ptr
.ptr
+ sizeof(unsigned long));
385 ptr
= ptr
+ gid
->offset
;
386 stack_top
->u
.ptr
.ptr
= ptr
;
387 stack_top
->u
.ptr
.object_type
= gid
->elem
.type
;
388 stack_top
->u
.ptr
.rev_bo
= gid
->elem
.rev_bo
;
389 /* field is only used for types nested within variants. */
390 stack_top
->u
.ptr
.field
= NULL
;
393 case OBJECT_TYPE_SEQUENCE
:
398 ptr
= *(const char **) (stack_top
->u
.ptr
.ptr
+ sizeof(unsigned long));
399 ptr_seq_len
= *(unsigned long *) stack_top
->u
.ptr
.ptr
;
400 if (gid
->offset
>= gid
->elem
.len
* ptr_seq_len
) {
404 ptr
= ptr
+ gid
->offset
;
405 stack_top
->u
.ptr
.ptr
= ptr
;
406 stack_top
->u
.ptr
.object_type
= gid
->elem
.type
;
407 stack_top
->u
.ptr
.rev_bo
= gid
->elem
.rev_bo
;
408 /* field is only used for types nested within variants. */
409 stack_top
->u
.ptr
.field
= NULL
;
412 case OBJECT_TYPE_STRUCT
:
413 printk(KERN_WARNING
"Nested structures are not supported yet.\n");
416 case OBJECT_TYPE_VARIANT
:
418 printk(KERN_WARNING
"Unexpected get index type %d",
419 (int) stack_top
->u
.ptr
.object_type
);
424 case LOAD_ROOT_CONTEXT
:
426 case LOAD_ROOT_APP_CONTEXT
:
428 ret
= context_get_index(lttng_probe_ctx
,
436 case LOAD_ROOT_PAYLOAD
:
437 stack_top
->u
.ptr
.ptr
+= gid
->offset
;
438 if (gid
->elem
.type
== OBJECT_TYPE_STRING
)
439 stack_top
->u
.ptr
.ptr
= *(const char * const *) stack_top
->u
.ptr
.ptr
;
440 stack_top
->u
.ptr
.object_type
= gid
->elem
.type
;
441 stack_top
->u
.ptr
.type
= LOAD_OBJECT
;
442 /* field is only used for types nested within variants. */
443 stack_top
->u
.ptr
.field
= NULL
;
452 static int dynamic_load_field(struct estack_entry
*stack_top
)
456 switch (stack_top
->u
.ptr
.type
) {
459 case LOAD_ROOT_CONTEXT
:
460 case LOAD_ROOT_APP_CONTEXT
:
461 case LOAD_ROOT_PAYLOAD
:
463 dbg_printk("Filter warning: cannot load root, missing field name.\n");
467 switch (stack_top
->u
.ptr
.object_type
) {
469 dbg_printk("op load field s8\n");
470 stack_top
->u
.v
= *(int8_t *) stack_top
->u
.ptr
.ptr
;
472 case OBJECT_TYPE_S16
:
476 dbg_printk("op load field s16\n");
477 tmp
= *(int16_t *) stack_top
->u
.ptr
.ptr
;
478 if (stack_top
->u
.ptr
.rev_bo
)
480 stack_top
->u
.v
= tmp
;
483 case OBJECT_TYPE_S32
:
487 dbg_printk("op load field s32\n");
488 tmp
= *(int32_t *) stack_top
->u
.ptr
.ptr
;
489 if (stack_top
->u
.ptr
.rev_bo
)
491 stack_top
->u
.v
= tmp
;
494 case OBJECT_TYPE_S64
:
498 dbg_printk("op load field s64\n");
499 tmp
= *(int64_t *) stack_top
->u
.ptr
.ptr
;
500 if (stack_top
->u
.ptr
.rev_bo
)
502 stack_top
->u
.v
= tmp
;
506 dbg_printk("op load field u8\n");
507 stack_top
->u
.v
= *(uint8_t *) stack_top
->u
.ptr
.ptr
;
509 case OBJECT_TYPE_U16
:
513 dbg_printk("op load field s16\n");
514 tmp
= *(uint16_t *) stack_top
->u
.ptr
.ptr
;
515 if (stack_top
->u
.ptr
.rev_bo
)
517 stack_top
->u
.v
= tmp
;
520 case OBJECT_TYPE_U32
:
524 dbg_printk("op load field u32\n");
525 tmp
= *(uint32_t *) stack_top
->u
.ptr
.ptr
;
526 if (stack_top
->u
.ptr
.rev_bo
)
528 stack_top
->u
.v
= tmp
;
531 case OBJECT_TYPE_U64
:
535 dbg_printk("op load field u64\n");
536 tmp
= *(uint64_t *) stack_top
->u
.ptr
.ptr
;
537 if (stack_top
->u
.ptr
.rev_bo
)
539 stack_top
->u
.v
= tmp
;
542 case OBJECT_TYPE_STRING
:
546 dbg_printk("op load field string\n");
547 str
= (const char *) stack_top
->u
.ptr
.ptr
;
548 stack_top
->u
.s
.str
= str
;
549 if (unlikely(!stack_top
->u
.s
.str
)) {
550 dbg_printk("Filter warning: loading a NULL string.\n");
554 stack_top
->u
.s
.seq_len
= LTTNG_SIZE_MAX
;
555 stack_top
->u
.s
.literal_type
=
556 ESTACK_STRING_LITERAL_TYPE_NONE
;
559 case OBJECT_TYPE_STRING_SEQUENCE
:
563 dbg_printk("op load field string sequence\n");
564 ptr
= stack_top
->u
.ptr
.ptr
;
565 stack_top
->u
.s
.seq_len
= *(unsigned long *) ptr
;
566 stack_top
->u
.s
.str
= *(const char **) (ptr
+ sizeof(unsigned long));
567 if (unlikely(!stack_top
->u
.s
.str
)) {
568 dbg_printk("Filter warning: loading a NULL sequence.\n");
572 stack_top
->u
.s
.literal_type
=
573 ESTACK_STRING_LITERAL_TYPE_NONE
;
576 case OBJECT_TYPE_DYNAMIC
:
578 * Dynamic types in context are looked up
579 * by context get index.
583 case OBJECT_TYPE_DOUBLE
:
586 case OBJECT_TYPE_SEQUENCE
:
587 case OBJECT_TYPE_ARRAY
:
588 case OBJECT_TYPE_STRUCT
:
589 case OBJECT_TYPE_VARIANT
:
590 printk(KERN_WARNING
"Sequences, arrays, struct and variant cannot be loaded (nested types).\n");
602 #define DBG_USER_STR_CUTOFF 32
605 * In debug mode, print user string (truncated, if necessary).
608 void dbg_load_ref_user_str_printk(const struct estack_entry
*user_str_reg
)
612 char user_str
[DBG_USER_STR_CUTOFF
];
616 last_char
= get_char(user_str_reg
, pos
);
617 user_str
[pos
] = last_char
;
619 } while (last_char
!= '\0' && pos
< sizeof(user_str
));
622 user_str
[sizeof(user_str
) - 1] = '\0';
623 dbg_printk("load field ref user string: '%s%s'\n", user_str
,
624 last_char
!= '\0' ? "[...]" : "");
628 void dbg_load_ref_user_str_printk(const struct estack_entry
*user_str_reg
)
634 * Return 0 (discard), or raise the 0x1 flag (log event).
635 * Currently, other flags are kept for future extensions and have no
638 uint64_t lttng_filter_interpret_bytecode(void *filter_data
,
639 struct lttng_probe_ctx
*lttng_probe_ctx
,
640 const char *filter_stack_data
)
642 struct bytecode_runtime
*bytecode
= filter_data
;
643 void *pc
, *next_pc
, *start_pc
;
646 struct estack _stack
;
647 struct estack
*stack
= &_stack
;
648 register int64_t ax
= 0, bx
= 0;
649 register int top
= FILTER_STACK_EMPTY
;
650 #ifndef INTERPRETER_USE_SWITCH
651 static void *dispatch
[NR_FILTER_OPS
] = {
652 [ FILTER_OP_UNKNOWN
] = &&LABEL_FILTER_OP_UNKNOWN
,
654 [ FILTER_OP_RETURN
] = &&LABEL_FILTER_OP_RETURN
,
657 [ FILTER_OP_MUL
] = &&LABEL_FILTER_OP_MUL
,
658 [ FILTER_OP_DIV
] = &&LABEL_FILTER_OP_DIV
,
659 [ FILTER_OP_MOD
] = &&LABEL_FILTER_OP_MOD
,
660 [ FILTER_OP_PLUS
] = &&LABEL_FILTER_OP_PLUS
,
661 [ FILTER_OP_MINUS
] = &&LABEL_FILTER_OP_MINUS
,
662 [ FILTER_OP_BIT_RSHIFT
] = &&LABEL_FILTER_OP_BIT_RSHIFT
,
663 [ FILTER_OP_BIT_LSHIFT
] = &&LABEL_FILTER_OP_BIT_LSHIFT
,
664 [ FILTER_OP_BIT_AND
] = &&LABEL_FILTER_OP_BIT_AND
,
665 [ FILTER_OP_BIT_OR
] = &&LABEL_FILTER_OP_BIT_OR
,
666 [ FILTER_OP_BIT_XOR
] = &&LABEL_FILTER_OP_BIT_XOR
,
668 /* binary comparators */
669 [ FILTER_OP_EQ
] = &&LABEL_FILTER_OP_EQ
,
670 [ FILTER_OP_NE
] = &&LABEL_FILTER_OP_NE
,
671 [ FILTER_OP_GT
] = &&LABEL_FILTER_OP_GT
,
672 [ FILTER_OP_LT
] = &&LABEL_FILTER_OP_LT
,
673 [ FILTER_OP_GE
] = &&LABEL_FILTER_OP_GE
,
674 [ FILTER_OP_LE
] = &&LABEL_FILTER_OP_LE
,
676 /* string binary comparator */
677 [ FILTER_OP_EQ_STRING
] = &&LABEL_FILTER_OP_EQ_STRING
,
678 [ FILTER_OP_NE_STRING
] = &&LABEL_FILTER_OP_NE_STRING
,
679 [ FILTER_OP_GT_STRING
] = &&LABEL_FILTER_OP_GT_STRING
,
680 [ FILTER_OP_LT_STRING
] = &&LABEL_FILTER_OP_LT_STRING
,
681 [ FILTER_OP_GE_STRING
] = &&LABEL_FILTER_OP_GE_STRING
,
682 [ FILTER_OP_LE_STRING
] = &&LABEL_FILTER_OP_LE_STRING
,
684 /* globbing pattern binary comparator */
685 [ FILTER_OP_EQ_STAR_GLOB_STRING
] = &&LABEL_FILTER_OP_EQ_STAR_GLOB_STRING
,
686 [ FILTER_OP_NE_STAR_GLOB_STRING
] = &&LABEL_FILTER_OP_NE_STAR_GLOB_STRING
,
688 /* s64 binary comparator */
689 [ FILTER_OP_EQ_S64
] = &&LABEL_FILTER_OP_EQ_S64
,
690 [ FILTER_OP_NE_S64
] = &&LABEL_FILTER_OP_NE_S64
,
691 [ FILTER_OP_GT_S64
] = &&LABEL_FILTER_OP_GT_S64
,
692 [ FILTER_OP_LT_S64
] = &&LABEL_FILTER_OP_LT_S64
,
693 [ FILTER_OP_GE_S64
] = &&LABEL_FILTER_OP_GE_S64
,
694 [ FILTER_OP_LE_S64
] = &&LABEL_FILTER_OP_LE_S64
,
696 /* double binary comparator */
697 [ FILTER_OP_EQ_DOUBLE
] = &&LABEL_FILTER_OP_EQ_DOUBLE
,
698 [ FILTER_OP_NE_DOUBLE
] = &&LABEL_FILTER_OP_NE_DOUBLE
,
699 [ FILTER_OP_GT_DOUBLE
] = &&LABEL_FILTER_OP_GT_DOUBLE
,
700 [ FILTER_OP_LT_DOUBLE
] = &&LABEL_FILTER_OP_LT_DOUBLE
,
701 [ FILTER_OP_GE_DOUBLE
] = &&LABEL_FILTER_OP_GE_DOUBLE
,
702 [ FILTER_OP_LE_DOUBLE
] = &&LABEL_FILTER_OP_LE_DOUBLE
,
704 /* Mixed S64-double binary comparators */
705 [ FILTER_OP_EQ_DOUBLE_S64
] = &&LABEL_FILTER_OP_EQ_DOUBLE_S64
,
706 [ FILTER_OP_NE_DOUBLE_S64
] = &&LABEL_FILTER_OP_NE_DOUBLE_S64
,
707 [ FILTER_OP_GT_DOUBLE_S64
] = &&LABEL_FILTER_OP_GT_DOUBLE_S64
,
708 [ FILTER_OP_LT_DOUBLE_S64
] = &&LABEL_FILTER_OP_LT_DOUBLE_S64
,
709 [ FILTER_OP_GE_DOUBLE_S64
] = &&LABEL_FILTER_OP_GE_DOUBLE_S64
,
710 [ FILTER_OP_LE_DOUBLE_S64
] = &&LABEL_FILTER_OP_LE_DOUBLE_S64
,
712 [ FILTER_OP_EQ_S64_DOUBLE
] = &&LABEL_FILTER_OP_EQ_S64_DOUBLE
,
713 [ FILTER_OP_NE_S64_DOUBLE
] = &&LABEL_FILTER_OP_NE_S64_DOUBLE
,
714 [ FILTER_OP_GT_S64_DOUBLE
] = &&LABEL_FILTER_OP_GT_S64_DOUBLE
,
715 [ FILTER_OP_LT_S64_DOUBLE
] = &&LABEL_FILTER_OP_LT_S64_DOUBLE
,
716 [ FILTER_OP_GE_S64_DOUBLE
] = &&LABEL_FILTER_OP_GE_S64_DOUBLE
,
717 [ FILTER_OP_LE_S64_DOUBLE
] = &&LABEL_FILTER_OP_LE_S64_DOUBLE
,
720 [ FILTER_OP_UNARY_PLUS
] = &&LABEL_FILTER_OP_UNARY_PLUS
,
721 [ FILTER_OP_UNARY_MINUS
] = &&LABEL_FILTER_OP_UNARY_MINUS
,
722 [ FILTER_OP_UNARY_NOT
] = &&LABEL_FILTER_OP_UNARY_NOT
,
723 [ FILTER_OP_UNARY_PLUS_S64
] = &&LABEL_FILTER_OP_UNARY_PLUS_S64
,
724 [ FILTER_OP_UNARY_MINUS_S64
] = &&LABEL_FILTER_OP_UNARY_MINUS_S64
,
725 [ FILTER_OP_UNARY_NOT_S64
] = &&LABEL_FILTER_OP_UNARY_NOT_S64
,
726 [ FILTER_OP_UNARY_PLUS_DOUBLE
] = &&LABEL_FILTER_OP_UNARY_PLUS_DOUBLE
,
727 [ FILTER_OP_UNARY_MINUS_DOUBLE
] = &&LABEL_FILTER_OP_UNARY_MINUS_DOUBLE
,
728 [ FILTER_OP_UNARY_NOT_DOUBLE
] = &&LABEL_FILTER_OP_UNARY_NOT_DOUBLE
,
731 [ FILTER_OP_AND
] = &&LABEL_FILTER_OP_AND
,
732 [ FILTER_OP_OR
] = &&LABEL_FILTER_OP_OR
,
735 [ FILTER_OP_LOAD_FIELD_REF
] = &&LABEL_FILTER_OP_LOAD_FIELD_REF
,
736 [ FILTER_OP_LOAD_FIELD_REF_STRING
] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_STRING
,
737 [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE
] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_SEQUENCE
,
738 [ FILTER_OP_LOAD_FIELD_REF_S64
] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_S64
,
739 [ FILTER_OP_LOAD_FIELD_REF_DOUBLE
] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_DOUBLE
,
741 /* load from immediate operand */
742 [ FILTER_OP_LOAD_STRING
] = &&LABEL_FILTER_OP_LOAD_STRING
,
743 [ FILTER_OP_LOAD_STAR_GLOB_STRING
] = &&LABEL_FILTER_OP_LOAD_STAR_GLOB_STRING
,
744 [ FILTER_OP_LOAD_S64
] = &&LABEL_FILTER_OP_LOAD_S64
,
745 [ FILTER_OP_LOAD_DOUBLE
] = &&LABEL_FILTER_OP_LOAD_DOUBLE
,
748 [ FILTER_OP_CAST_TO_S64
] = &&LABEL_FILTER_OP_CAST_TO_S64
,
749 [ FILTER_OP_CAST_DOUBLE_TO_S64
] = &&LABEL_FILTER_OP_CAST_DOUBLE_TO_S64
,
750 [ FILTER_OP_CAST_NOP
] = &&LABEL_FILTER_OP_CAST_NOP
,
752 /* get context ref */
753 [ FILTER_OP_GET_CONTEXT_REF
] = &&LABEL_FILTER_OP_GET_CONTEXT_REF
,
754 [ FILTER_OP_GET_CONTEXT_REF_STRING
] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_STRING
,
755 [ FILTER_OP_GET_CONTEXT_REF_S64
] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_S64
,
756 [ FILTER_OP_GET_CONTEXT_REF_DOUBLE
] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_DOUBLE
,
758 /* load userspace field ref */
759 [ FILTER_OP_LOAD_FIELD_REF_USER_STRING
] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_STRING
,
760 [ FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE
] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE
,
762 /* Instructions for recursive traversal through composed types. */
763 [ FILTER_OP_GET_CONTEXT_ROOT
] = &&LABEL_FILTER_OP_GET_CONTEXT_ROOT
,
764 [ FILTER_OP_GET_APP_CONTEXT_ROOT
] = &&LABEL_FILTER_OP_GET_APP_CONTEXT_ROOT
,
765 [ FILTER_OP_GET_PAYLOAD_ROOT
] = &&LABEL_FILTER_OP_GET_PAYLOAD_ROOT
,
767 [ FILTER_OP_GET_SYMBOL
] = &&LABEL_FILTER_OP_GET_SYMBOL
,
768 [ FILTER_OP_GET_SYMBOL_FIELD
] = &&LABEL_FILTER_OP_GET_SYMBOL_FIELD
,
769 [ FILTER_OP_GET_INDEX_U16
] = &&LABEL_FILTER_OP_GET_INDEX_U16
,
770 [ FILTER_OP_GET_INDEX_U64
] = &&LABEL_FILTER_OP_GET_INDEX_U64
,
772 [ FILTER_OP_LOAD_FIELD
] = &&LABEL_FILTER_OP_LOAD_FIELD
,
773 [ FILTER_OP_LOAD_FIELD_S8
] = &&LABEL_FILTER_OP_LOAD_FIELD_S8
,
774 [ FILTER_OP_LOAD_FIELD_S16
] = &&LABEL_FILTER_OP_LOAD_FIELD_S16
,
775 [ FILTER_OP_LOAD_FIELD_S32
] = &&LABEL_FILTER_OP_LOAD_FIELD_S32
,
776 [ FILTER_OP_LOAD_FIELD_S64
] = &&LABEL_FILTER_OP_LOAD_FIELD_S64
,
777 [ FILTER_OP_LOAD_FIELD_U8
] = &&LABEL_FILTER_OP_LOAD_FIELD_U8
,
778 [ FILTER_OP_LOAD_FIELD_U16
] = &&LABEL_FILTER_OP_LOAD_FIELD_U16
,
779 [ FILTER_OP_LOAD_FIELD_U32
] = &&LABEL_FILTER_OP_LOAD_FIELD_U32
,
780 [ FILTER_OP_LOAD_FIELD_U64
] = &&LABEL_FILTER_OP_LOAD_FIELD_U64
,
781 [ FILTER_OP_LOAD_FIELD_STRING
] = &&LABEL_FILTER_OP_LOAD_FIELD_STRING
,
782 [ FILTER_OP_LOAD_FIELD_SEQUENCE
] = &&LABEL_FILTER_OP_LOAD_FIELD_SEQUENCE
,
783 [ FILTER_OP_LOAD_FIELD_DOUBLE
] = &&LABEL_FILTER_OP_LOAD_FIELD_DOUBLE
,
785 [ FILTER_OP_UNARY_BIT_NOT
] = &&LABEL_FILTER_OP_UNARY_BIT_NOT
,
787 [ FILTER_OP_RETURN_S64
] = &&LABEL_FILTER_OP_RETURN_S64
,
789 #endif /* #ifndef INTERPRETER_USE_SWITCH */
793 OP(FILTER_OP_UNKNOWN
):
794 OP(FILTER_OP_LOAD_FIELD_REF
):
795 OP(FILTER_OP_GET_CONTEXT_REF
):
796 #ifdef INTERPRETER_USE_SWITCH
798 #endif /* INTERPRETER_USE_SWITCH */
799 printk(KERN_WARNING
"unknown bytecode op %u\n",
800 (unsigned int) *(filter_opcode_t
*) pc
);
804 OP(FILTER_OP_RETURN
):
805 OP(FILTER_OP_RETURN_S64
):
806 /* LTTNG_FILTER_DISCARD or LTTNG_FILTER_RECORD_FLAG */
807 retval
= !!estack_ax_v
;
817 printk(KERN_WARNING
"unsupported bytecode op %u\n",
818 (unsigned int) *(filter_opcode_t
*) pc
);
828 printk(KERN_WARNING
"unsupported non-specialized bytecode op %u\n",
829 (unsigned int) *(filter_opcode_t
*) pc
);
833 OP(FILTER_OP_EQ_STRING
):
837 res
= (stack_strcmp(stack
, top
, "==") == 0);
838 estack_pop(stack
, top
, ax
, bx
);
840 next_pc
+= sizeof(struct binary_op
);
843 OP(FILTER_OP_NE_STRING
):
847 res
= (stack_strcmp(stack
, top
, "!=") != 0);
848 estack_pop(stack
, top
, ax
, bx
);
850 next_pc
+= sizeof(struct binary_op
);
853 OP(FILTER_OP_GT_STRING
):
857 res
= (stack_strcmp(stack
, top
, ">") > 0);
858 estack_pop(stack
, top
, ax
, bx
);
860 next_pc
+= sizeof(struct binary_op
);
863 OP(FILTER_OP_LT_STRING
):
867 res
= (stack_strcmp(stack
, top
, "<") < 0);
868 estack_pop(stack
, top
, ax
, bx
);
870 next_pc
+= sizeof(struct binary_op
);
873 OP(FILTER_OP_GE_STRING
):
877 res
= (stack_strcmp(stack
, top
, ">=") >= 0);
878 estack_pop(stack
, top
, ax
, bx
);
880 next_pc
+= sizeof(struct binary_op
);
883 OP(FILTER_OP_LE_STRING
):
887 res
= (stack_strcmp(stack
, top
, "<=") <= 0);
888 estack_pop(stack
, top
, ax
, bx
);
890 next_pc
+= sizeof(struct binary_op
);
894 OP(FILTER_OP_EQ_STAR_GLOB_STRING
):
898 res
= (stack_star_glob_match(stack
, top
, "==") == 0);
899 estack_pop(stack
, top
, ax
, bx
);
901 next_pc
+= sizeof(struct binary_op
);
904 OP(FILTER_OP_NE_STAR_GLOB_STRING
):
908 res
= (stack_star_glob_match(stack
, top
, "!=") != 0);
909 estack_pop(stack
, top
, ax
, bx
);
911 next_pc
+= sizeof(struct binary_op
);
915 OP(FILTER_OP_EQ_S64
):
919 res
= (estack_bx_v
== estack_ax_v
);
920 estack_pop(stack
, top
, ax
, bx
);
922 next_pc
+= sizeof(struct binary_op
);
925 OP(FILTER_OP_NE_S64
):
929 res
= (estack_bx_v
!= estack_ax_v
);
930 estack_pop(stack
, top
, ax
, bx
);
932 next_pc
+= sizeof(struct binary_op
);
935 OP(FILTER_OP_GT_S64
):
939 res
= (estack_bx_v
> estack_ax_v
);
940 estack_pop(stack
, top
, ax
, bx
);
942 next_pc
+= sizeof(struct binary_op
);
945 OP(FILTER_OP_LT_S64
):
949 res
= (estack_bx_v
< estack_ax_v
);
950 estack_pop(stack
, top
, ax
, bx
);
952 next_pc
+= sizeof(struct binary_op
);
955 OP(FILTER_OP_GE_S64
):
959 res
= (estack_bx_v
>= estack_ax_v
);
960 estack_pop(stack
, top
, ax
, bx
);
962 next_pc
+= sizeof(struct binary_op
);
965 OP(FILTER_OP_LE_S64
):
969 res
= (estack_bx_v
<= estack_ax_v
);
970 estack_pop(stack
, top
, ax
, bx
);
972 next_pc
+= sizeof(struct binary_op
);
976 OP(FILTER_OP_EQ_DOUBLE
):
977 OP(FILTER_OP_NE_DOUBLE
):
978 OP(FILTER_OP_GT_DOUBLE
):
979 OP(FILTER_OP_LT_DOUBLE
):
980 OP(FILTER_OP_GE_DOUBLE
):
981 OP(FILTER_OP_LE_DOUBLE
):
987 /* Mixed S64-double binary comparators */
988 OP(FILTER_OP_EQ_DOUBLE_S64
):
989 OP(FILTER_OP_NE_DOUBLE_S64
):
990 OP(FILTER_OP_GT_DOUBLE_S64
):
991 OP(FILTER_OP_LT_DOUBLE_S64
):
992 OP(FILTER_OP_GE_DOUBLE_S64
):
993 OP(FILTER_OP_LE_DOUBLE_S64
):
994 OP(FILTER_OP_EQ_S64_DOUBLE
):
995 OP(FILTER_OP_NE_S64_DOUBLE
):
996 OP(FILTER_OP_GT_S64_DOUBLE
):
997 OP(FILTER_OP_LT_S64_DOUBLE
):
998 OP(FILTER_OP_GE_S64_DOUBLE
):
999 OP(FILTER_OP_LE_S64_DOUBLE
):
1004 OP(FILTER_OP_BIT_RSHIFT
):
1008 /* Catch undefined behavior. */
1009 if (unlikely(estack_ax_v
< 0 || estack_ax_v
>= 64)) {
1013 res
= ((uint64_t) estack_bx_v
>> (uint32_t) estack_ax_v
);
1014 estack_pop(stack
, top
, ax
, bx
);
1016 next_pc
+= sizeof(struct binary_op
);
1019 OP(FILTER_OP_BIT_LSHIFT
):
1023 /* Catch undefined behavior. */
1024 if (unlikely(estack_ax_v
< 0 || estack_ax_v
>= 64)) {
1028 res
= ((uint64_t) estack_bx_v
<< (uint32_t) estack_ax_v
);
1029 estack_pop(stack
, top
, ax
, bx
);
1031 next_pc
+= sizeof(struct binary_op
);
1034 OP(FILTER_OP_BIT_AND
):
1038 res
= ((uint64_t) estack_bx_v
& (uint64_t) estack_ax_v
);
1039 estack_pop(stack
, top
, ax
, bx
);
1041 next_pc
+= sizeof(struct binary_op
);
1044 OP(FILTER_OP_BIT_OR
):
1048 res
= ((uint64_t) estack_bx_v
| (uint64_t) estack_ax_v
);
1049 estack_pop(stack
, top
, ax
, bx
);
1051 next_pc
+= sizeof(struct binary_op
);
1054 OP(FILTER_OP_BIT_XOR
):
1058 res
= ((uint64_t) estack_bx_v
^ (uint64_t) estack_ax_v
);
1059 estack_pop(stack
, top
, ax
, bx
);
1061 next_pc
+= sizeof(struct binary_op
);
1066 OP(FILTER_OP_UNARY_PLUS
):
1067 OP(FILTER_OP_UNARY_MINUS
):
1068 OP(FILTER_OP_UNARY_NOT
):
1069 printk(KERN_WARNING
"unsupported non-specialized bytecode op %u\n",
1070 (unsigned int) *(filter_opcode_t
*) pc
);
1075 OP(FILTER_OP_UNARY_BIT_NOT
):
1077 estack_ax_v
= ~(uint64_t) estack_ax_v
;
1078 next_pc
+= sizeof(struct unary_op
);
1082 OP(FILTER_OP_UNARY_PLUS_S64
):
1084 next_pc
+= sizeof(struct unary_op
);
1087 OP(FILTER_OP_UNARY_MINUS_S64
):
1089 estack_ax_v
= -estack_ax_v
;
1090 next_pc
+= sizeof(struct unary_op
);
1093 OP(FILTER_OP_UNARY_PLUS_DOUBLE
):
1094 OP(FILTER_OP_UNARY_MINUS_DOUBLE
):
1099 OP(FILTER_OP_UNARY_NOT_S64
):
1101 estack_ax_v
= !estack_ax_v
;
1102 next_pc
+= sizeof(struct unary_op
);
1105 OP(FILTER_OP_UNARY_NOT_DOUBLE
):
1114 struct logical_op
*insn
= (struct logical_op
*) pc
;
1116 /* If AX is 0, skip and evaluate to 0 */
1117 if (unlikely(estack_ax_v
== 0)) {
1118 dbg_printk("Jumping to bytecode offset %u\n",
1119 (unsigned int) insn
->skip_offset
);
1120 next_pc
= start_pc
+ insn
->skip_offset
;
1122 /* Pop 1 when jump not taken */
1123 estack_pop(stack
, top
, ax
, bx
);
1124 next_pc
+= sizeof(struct logical_op
);
1130 struct logical_op
*insn
= (struct logical_op
*) pc
;
1132 /* If AX is nonzero, skip and evaluate to 1 */
1134 if (unlikely(estack_ax_v
!= 0)) {
1136 dbg_printk("Jumping to bytecode offset %u\n",
1137 (unsigned int) insn
->skip_offset
);
1138 next_pc
= start_pc
+ insn
->skip_offset
;
1140 /* Pop 1 when jump not taken */
1141 estack_pop(stack
, top
, ax
, bx
);
1142 next_pc
+= sizeof(struct logical_op
);
1148 /* load field ref */
1149 OP(FILTER_OP_LOAD_FIELD_REF_STRING
):
1151 struct load_op
*insn
= (struct load_op
*) pc
;
1152 struct field_ref
*ref
= (struct field_ref
*) insn
->data
;
1154 dbg_printk("load field ref offset %u type string\n",
1156 estack_push(stack
, top
, ax
, bx
);
1157 estack_ax(stack
, top
)->u
.s
.str
=
1158 *(const char * const *) &filter_stack_data
[ref
->offset
];
1159 if (unlikely(!estack_ax(stack
, top
)->u
.s
.str
)) {
1160 dbg_printk("Filter warning: loading a NULL string.\n");
1164 estack_ax(stack
, top
)->u
.s
.seq_len
= LTTNG_SIZE_MAX
;
1165 estack_ax(stack
, top
)->u
.s
.literal_type
=
1166 ESTACK_STRING_LITERAL_TYPE_NONE
;
1167 estack_ax(stack
, top
)->u
.s
.user
= 0;
1168 dbg_printk("ref load string %s\n", estack_ax(stack
, top
)->u
.s
.str
);
1169 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
1173 OP(FILTER_OP_LOAD_FIELD_REF_SEQUENCE
):
1175 struct load_op
*insn
= (struct load_op
*) pc
;
1176 struct field_ref
*ref
= (struct field_ref
*) insn
->data
;
1178 dbg_printk("load field ref offset %u type sequence\n",
1180 estack_push(stack
, top
, ax
, bx
);
1181 estack_ax(stack
, top
)->u
.s
.seq_len
=
1182 *(unsigned long *) &filter_stack_data
[ref
->offset
];
1183 estack_ax(stack
, top
)->u
.s
.str
=
1184 *(const char **) (&filter_stack_data
[ref
->offset
1185 + sizeof(unsigned long)]);
1186 if (unlikely(!estack_ax(stack
, top
)->u
.s
.str
)) {
1187 dbg_printk("Filter warning: loading a NULL sequence.\n");
1191 estack_ax(stack
, top
)->u
.s
.literal_type
=
1192 ESTACK_STRING_LITERAL_TYPE_NONE
;
1193 estack_ax(stack
, top
)->u
.s
.user
= 0;
1194 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
1198 OP(FILTER_OP_LOAD_FIELD_REF_S64
):
1200 struct load_op
*insn
= (struct load_op
*) pc
;
1201 struct field_ref
*ref
= (struct field_ref
*) insn
->data
;
1203 dbg_printk("load field ref offset %u type s64\n",
1205 estack_push(stack
, top
, ax
, bx
);
1207 ((struct literal_numeric
*) &filter_stack_data
[ref
->offset
])->v
;
1208 dbg_printk("ref load s64 %lld\n",
1209 (long long) estack_ax_v
);
1210 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
1214 OP(FILTER_OP_LOAD_FIELD_REF_DOUBLE
):
1220 /* load from immediate operand */
1221 OP(FILTER_OP_LOAD_STRING
):
1223 struct load_op
*insn
= (struct load_op
*) pc
;
1225 dbg_printk("load string %s\n", insn
->data
);
1226 estack_push(stack
, top
, ax
, bx
);
1227 estack_ax(stack
, top
)->u
.s
.str
= insn
->data
;
1228 estack_ax(stack
, top
)->u
.s
.seq_len
= LTTNG_SIZE_MAX
;
1229 estack_ax(stack
, top
)->u
.s
.literal_type
=
1230 ESTACK_STRING_LITERAL_TYPE_PLAIN
;
1231 estack_ax(stack
, top
)->u
.s
.user
= 0;
1232 next_pc
+= sizeof(struct load_op
) + strlen(insn
->data
) + 1;
1236 OP(FILTER_OP_LOAD_STAR_GLOB_STRING
):
1238 struct load_op
*insn
= (struct load_op
*) pc
;
1240 dbg_printk("load globbing pattern %s\n", insn
->data
);
1241 estack_push(stack
, top
, ax
, bx
);
1242 estack_ax(stack
, top
)->u
.s
.str
= insn
->data
;
1243 estack_ax(stack
, top
)->u
.s
.seq_len
= LTTNG_SIZE_MAX
;
1244 estack_ax(stack
, top
)->u
.s
.literal_type
=
1245 ESTACK_STRING_LITERAL_TYPE_STAR_GLOB
;
1246 estack_ax(stack
, top
)->u
.s
.user
= 0;
1247 next_pc
+= sizeof(struct load_op
) + strlen(insn
->data
) + 1;
1251 OP(FILTER_OP_LOAD_S64
):
1253 struct load_op
*insn
= (struct load_op
*) pc
;
1255 estack_push(stack
, top
, ax
, bx
);
1256 estack_ax_v
= ((struct literal_numeric
*) insn
->data
)->v
;
1257 dbg_printk("load s64 %lld\n",
1258 (long long) estack_ax_v
);
1259 next_pc
+= sizeof(struct load_op
)
1260 + sizeof(struct literal_numeric
);
1264 OP(FILTER_OP_LOAD_DOUBLE
):
1271 OP(FILTER_OP_CAST_TO_S64
):
1272 printk(KERN_WARNING
"unsupported non-specialized bytecode op %u\n",
1273 (unsigned int) *(filter_opcode_t
*) pc
);
1277 OP(FILTER_OP_CAST_DOUBLE_TO_S64
):
1283 OP(FILTER_OP_CAST_NOP
):
1285 next_pc
+= sizeof(struct cast_op
);
1289 /* get context ref */
1290 OP(FILTER_OP_GET_CONTEXT_REF_STRING
):
1292 struct load_op
*insn
= (struct load_op
*) pc
;
1293 struct field_ref
*ref
= (struct field_ref
*) insn
->data
;
1294 struct lttng_ctx_field
*ctx_field
;
1295 union lttng_ctx_value v
;
1297 dbg_printk("get context ref offset %u type string\n",
1299 ctx_field
= <tng_static_ctx
->fields
[ref
->offset
];
1300 ctx_field
->get_value(ctx_field
, lttng_probe_ctx
, &v
);
1301 estack_push(stack
, top
, ax
, bx
);
1302 estack_ax(stack
, top
)->u
.s
.str
= v
.str
;
1303 if (unlikely(!estack_ax(stack
, top
)->u
.s
.str
)) {
1304 dbg_printk("Filter warning: loading a NULL string.\n");
1308 estack_ax(stack
, top
)->u
.s
.seq_len
= LTTNG_SIZE_MAX
;
1309 estack_ax(stack
, top
)->u
.s
.literal_type
=
1310 ESTACK_STRING_LITERAL_TYPE_NONE
;
1311 estack_ax(stack
, top
)->u
.s
.user
= 0;
1312 dbg_printk("ref get context string %s\n", estack_ax(stack
, top
)->u
.s
.str
);
1313 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
1317 OP(FILTER_OP_GET_CONTEXT_REF_S64
):
1319 struct load_op
*insn
= (struct load_op
*) pc
;
1320 struct field_ref
*ref
= (struct field_ref
*) insn
->data
;
1321 struct lttng_ctx_field
*ctx_field
;
1322 union lttng_ctx_value v
;
1324 dbg_printk("get context ref offset %u type s64\n",
1326 ctx_field
= <tng_static_ctx
->fields
[ref
->offset
];
1327 ctx_field
->get_value(ctx_field
, lttng_probe_ctx
, &v
);
1328 estack_push(stack
, top
, ax
, bx
);
1329 estack_ax_v
= v
.s64
;
1330 dbg_printk("ref get context s64 %lld\n",
1331 (long long) estack_ax_v
);
1332 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
1336 OP(FILTER_OP_GET_CONTEXT_REF_DOUBLE
):
1342 /* load userspace field ref */
1343 OP(FILTER_OP_LOAD_FIELD_REF_USER_STRING
):
1345 struct load_op
*insn
= (struct load_op
*) pc
;
1346 struct field_ref
*ref
= (struct field_ref
*) insn
->data
;
1348 dbg_printk("load field ref offset %u type user string\n",
1350 estack_push(stack
, top
, ax
, bx
);
1351 estack_ax(stack
, top
)->u
.s
.user_str
=
1352 *(const char * const *) &filter_stack_data
[ref
->offset
];
1353 if (unlikely(!estack_ax(stack
, top
)->u
.s
.user_str
)) {
1354 dbg_printk("Filter warning: loading a NULL string.\n");
1358 estack_ax(stack
, top
)->u
.s
.seq_len
= LTTNG_SIZE_MAX
;
1359 estack_ax(stack
, top
)->u
.s
.literal_type
=
1360 ESTACK_STRING_LITERAL_TYPE_NONE
;
1361 estack_ax(stack
, top
)->u
.s
.user
= 1;
1362 dbg_load_ref_user_str_printk(estack_ax(stack
, top
));
1363 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
1367 OP(FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE
):
1369 struct load_op
*insn
= (struct load_op
*) pc
;
1370 struct field_ref
*ref
= (struct field_ref
*) insn
->data
;
1372 dbg_printk("load field ref offset %u type user sequence\n",
1374 estack_push(stack
, top
, ax
, bx
);
1375 estack_ax(stack
, top
)->u
.s
.seq_len
=
1376 *(unsigned long *) &filter_stack_data
[ref
->offset
];
1377 estack_ax(stack
, top
)->u
.s
.user_str
=
1378 *(const char **) (&filter_stack_data
[ref
->offset
1379 + sizeof(unsigned long)]);
1380 if (unlikely(!estack_ax(stack
, top
)->u
.s
.user_str
)) {
1381 dbg_printk("Filter warning: loading a NULL sequence.\n");
1385 estack_ax(stack
, top
)->u
.s
.literal_type
=
1386 ESTACK_STRING_LITERAL_TYPE_NONE
;
1387 estack_ax(stack
, top
)->u
.s
.user
= 1;
1388 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
1392 OP(FILTER_OP_GET_CONTEXT_ROOT
):
1394 dbg_printk("op get context root\n");
1395 estack_push(stack
, top
, ax
, bx
);
1396 estack_ax(stack
, top
)->u
.ptr
.type
= LOAD_ROOT_CONTEXT
;
1397 /* "field" only needed for variants. */
1398 estack_ax(stack
, top
)->u
.ptr
.field
= NULL
;
1399 next_pc
+= sizeof(struct load_op
);
1403 OP(FILTER_OP_GET_APP_CONTEXT_ROOT
):
1409 OP(FILTER_OP_GET_PAYLOAD_ROOT
):
1411 dbg_printk("op get app payload root\n");
1412 estack_push(stack
, top
, ax
, bx
);
1413 estack_ax(stack
, top
)->u
.ptr
.type
= LOAD_ROOT_PAYLOAD
;
1414 estack_ax(stack
, top
)->u
.ptr
.ptr
= filter_stack_data
;
1415 /* "field" only needed for variants. */
1416 estack_ax(stack
, top
)->u
.ptr
.field
= NULL
;
1417 next_pc
+= sizeof(struct load_op
);
1421 OP(FILTER_OP_GET_SYMBOL
):
1423 dbg_printk("op get symbol\n");
1424 switch (estack_ax(stack
, top
)->u
.ptr
.type
) {
1426 printk(KERN_WARNING
"Nested fields not implemented yet.\n");
1429 case LOAD_ROOT_CONTEXT
:
1430 case LOAD_ROOT_APP_CONTEXT
:
1431 case LOAD_ROOT_PAYLOAD
:
1433 * symbol lookup is performed by
1439 next_pc
+= sizeof(struct load_op
) + sizeof(struct get_symbol
);
1443 OP(FILTER_OP_GET_SYMBOL_FIELD
):
1446 * Used for first variant encountered in a
1447 * traversal. Variants are not implemented yet.
1453 OP(FILTER_OP_GET_INDEX_U16
):
1455 struct load_op
*insn
= (struct load_op
*) pc
;
1456 struct get_index_u16
*index
= (struct get_index_u16
*) insn
->data
;
1458 dbg_printk("op get index u16\n");
1459 ret
= dynamic_get_index(lttng_probe_ctx
, bytecode
, index
->index
, estack_ax(stack
, top
));
1462 estack_ax_v
= estack_ax(stack
, top
)->u
.v
;
1463 next_pc
+= sizeof(struct load_op
) + sizeof(struct get_index_u16
);
1467 OP(FILTER_OP_GET_INDEX_U64
):
1469 struct load_op
*insn
= (struct load_op
*) pc
;
1470 struct get_index_u64
*index
= (struct get_index_u64
*) insn
->data
;
1472 dbg_printk("op get index u64\n");
1473 ret
= dynamic_get_index(lttng_probe_ctx
, bytecode
, index
->index
, estack_ax(stack
, top
));
1476 estack_ax_v
= estack_ax(stack
, top
)->u
.v
;
1477 next_pc
+= sizeof(struct load_op
) + sizeof(struct get_index_u64
);
1481 OP(FILTER_OP_LOAD_FIELD
):
1483 dbg_printk("op load field\n");
1484 ret
= dynamic_load_field(estack_ax(stack
, top
));
1487 estack_ax_v
= estack_ax(stack
, top
)->u
.v
;
1488 next_pc
+= sizeof(struct load_op
);
1492 OP(FILTER_OP_LOAD_FIELD_S8
):
1494 dbg_printk("op load field s8\n");
1496 estack_ax_v
= *(int8_t *) estack_ax(stack
, top
)->u
.ptr
.ptr
;
1497 next_pc
+= sizeof(struct load_op
);
1500 OP(FILTER_OP_LOAD_FIELD_S16
):
1502 dbg_printk("op load field s16\n");
1504 estack_ax_v
= *(int16_t *) estack_ax(stack
, top
)->u
.ptr
.ptr
;
1505 next_pc
+= sizeof(struct load_op
);
1508 OP(FILTER_OP_LOAD_FIELD_S32
):
1510 dbg_printk("op load field s32\n");
1512 estack_ax_v
= *(int32_t *) estack_ax(stack
, top
)->u
.ptr
.ptr
;
1513 next_pc
+= sizeof(struct load_op
);
1516 OP(FILTER_OP_LOAD_FIELD_S64
):
1518 dbg_printk("op load field s64\n");
1520 estack_ax_v
= *(int64_t *) estack_ax(stack
, top
)->u
.ptr
.ptr
;
1521 next_pc
+= sizeof(struct load_op
);
1524 OP(FILTER_OP_LOAD_FIELD_U8
):
1526 dbg_printk("op load field u8\n");
1528 estack_ax_v
= *(uint8_t *) estack_ax(stack
, top
)->u
.ptr
.ptr
;
1529 next_pc
+= sizeof(struct load_op
);
1532 OP(FILTER_OP_LOAD_FIELD_U16
):
1534 dbg_printk("op load field u16\n");
1536 estack_ax_v
= *(uint16_t *) estack_ax(stack
, top
)->u
.ptr
.ptr
;
1537 next_pc
+= sizeof(struct load_op
);
1540 OP(FILTER_OP_LOAD_FIELD_U32
):
1542 dbg_printk("op load field u32\n");
1544 estack_ax_v
= *(uint32_t *) estack_ax(stack
, top
)->u
.ptr
.ptr
;
1545 next_pc
+= sizeof(struct load_op
);
1548 OP(FILTER_OP_LOAD_FIELD_U64
):
1550 dbg_printk("op load field u64\n");
1552 estack_ax_v
= *(uint64_t *) estack_ax(stack
, top
)->u
.ptr
.ptr
;
1553 next_pc
+= sizeof(struct load_op
);
1556 OP(FILTER_OP_LOAD_FIELD_DOUBLE
):
1562 OP(FILTER_OP_LOAD_FIELD_STRING
):
1566 dbg_printk("op load field string\n");
1567 str
= (const char *) estack_ax(stack
, top
)->u
.ptr
.ptr
;
1568 estack_ax(stack
, top
)->u
.s
.str
= str
;
1569 if (unlikely(!estack_ax(stack
, top
)->u
.s
.str
)) {
1570 dbg_printk("Filter warning: loading a NULL string.\n");
1574 estack_ax(stack
, top
)->u
.s
.seq_len
= LTTNG_SIZE_MAX
;
1575 estack_ax(stack
, top
)->u
.s
.literal_type
=
1576 ESTACK_STRING_LITERAL_TYPE_NONE
;
1577 next_pc
+= sizeof(struct load_op
);
1581 OP(FILTER_OP_LOAD_FIELD_SEQUENCE
):
1585 dbg_printk("op load field string sequence\n");
1586 ptr
= estack_ax(stack
, top
)->u
.ptr
.ptr
;
1587 estack_ax(stack
, top
)->u
.s
.seq_len
= *(unsigned long *) ptr
;
1588 estack_ax(stack
, top
)->u
.s
.str
= *(const char **) (ptr
+ sizeof(unsigned long));
1589 if (unlikely(!estack_ax(stack
, top
)->u
.s
.str
)) {
1590 dbg_printk("Filter warning: loading a NULL sequence.\n");
1594 estack_ax(stack
, top
)->u
.s
.literal_type
=
1595 ESTACK_STRING_LITERAL_TYPE_NONE
;
1596 next_pc
+= sizeof(struct load_op
);
1602 /* return 0 (discard) on error */