1 /* SPDX-License-Identifier: MIT
3 * lttng-filter-specialize.c
5 * LTTng modules filter code specializer.
7 * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
10 #include <linux/slab.h>
11 #include <lttng/filter.h>
12 #include <lttng/align.h>
14 static ssize_t
bytecode_reserve_data(struct bytecode_runtime
*runtime
,
15 size_t align
, size_t len
)
18 size_t padding
= offset_align(runtime
->data_len
, align
);
19 size_t new_len
= runtime
->data_len
+ padding
+ len
;
20 size_t new_alloc_len
= new_len
;
21 size_t old_alloc_len
= runtime
->data_alloc_len
;
23 if (new_len
> FILTER_MAX_DATA_LEN
)
26 if (new_alloc_len
> old_alloc_len
) {
30 max_t(size_t, 1U << get_count_order(new_alloc_len
), old_alloc_len
<< 1);
31 newptr
= krealloc(runtime
->data
, new_alloc_len
, GFP_KERNEL
);
34 runtime
->data
= newptr
;
35 /* We zero directly the memory from start of allocation. */
36 memset(&runtime
->data
[old_alloc_len
], 0, new_alloc_len
- old_alloc_len
);
37 runtime
->data_alloc_len
= new_alloc_len
;
39 runtime
->data_len
+= padding
;
40 ret
= runtime
->data_len
;
41 runtime
->data_len
+= len
;
45 static ssize_t
bytecode_push_data(struct bytecode_runtime
*runtime
,
46 const void *p
, size_t align
, size_t len
)
50 offset
= bytecode_reserve_data(runtime
, align
, len
);
53 memcpy(&runtime
->data
[offset
], p
, len
);
57 static int specialize_load_field(struct vstack_entry
*stack_top
,
62 switch (stack_top
->load
.type
) {
65 case LOAD_ROOT_CONTEXT
:
66 case LOAD_ROOT_APP_CONTEXT
:
67 case LOAD_ROOT_PAYLOAD
:
69 dbg_printk("Filter warning: cannot load root, missing field name.\n");
73 switch (stack_top
->load
.object_type
) {
75 dbg_printk("op load field s8\n");
76 stack_top
->type
= REG_S64
;
77 if (!stack_top
->load
.rev_bo
)
78 insn
->op
= FILTER_OP_LOAD_FIELD_S8
;
81 dbg_printk("op load field s16\n");
82 stack_top
->type
= REG_S64
;
83 if (!stack_top
->load
.rev_bo
)
84 insn
->op
= FILTER_OP_LOAD_FIELD_S16
;
87 dbg_printk("op load field s32\n");
88 stack_top
->type
= REG_S64
;
89 if (!stack_top
->load
.rev_bo
)
90 insn
->op
= FILTER_OP_LOAD_FIELD_S32
;
93 dbg_printk("op load field s64\n");
94 stack_top
->type
= REG_S64
;
95 if (!stack_top
->load
.rev_bo
)
96 insn
->op
= FILTER_OP_LOAD_FIELD_S64
;
99 dbg_printk("op load field u8\n");
100 stack_top
->type
= REG_S64
;
101 insn
->op
= FILTER_OP_LOAD_FIELD_U8
;
103 case OBJECT_TYPE_U16
:
104 dbg_printk("op load field u16\n");
105 stack_top
->type
= REG_S64
;
106 if (!stack_top
->load
.rev_bo
)
107 insn
->op
= FILTER_OP_LOAD_FIELD_U16
;
109 case OBJECT_TYPE_U32
:
110 dbg_printk("op load field u32\n");
111 stack_top
->type
= REG_S64
;
112 if (!stack_top
->load
.rev_bo
)
113 insn
->op
= FILTER_OP_LOAD_FIELD_U32
;
115 case OBJECT_TYPE_U64
:
116 dbg_printk("op load field u64\n");
117 stack_top
->type
= REG_S64
;
118 if (!stack_top
->load
.rev_bo
)
119 insn
->op
= FILTER_OP_LOAD_FIELD_U64
;
121 case OBJECT_TYPE_DOUBLE
:
122 printk(KERN_WARNING
"LTTng: filter: Double type unsupported\n\n");
125 case OBJECT_TYPE_STRING
:
126 dbg_printk("op load field string\n");
127 stack_top
->type
= REG_STRING
;
128 insn
->op
= FILTER_OP_LOAD_FIELD_STRING
;
130 case OBJECT_TYPE_STRING_SEQUENCE
:
131 dbg_printk("op load field string sequence\n");
132 stack_top
->type
= REG_STRING
;
133 insn
->op
= FILTER_OP_LOAD_FIELD_SEQUENCE
;
135 case OBJECT_TYPE_DYNAMIC
:
138 case OBJECT_TYPE_SEQUENCE
:
139 case OBJECT_TYPE_ARRAY
:
140 case OBJECT_TYPE_STRUCT
:
141 case OBJECT_TYPE_VARIANT
:
142 printk(KERN_WARNING
"LTTng: filter: Sequences, arrays, struct and variant cannot be loaded (nested types).\n");
152 static int specialize_get_index_object_type(enum object_type
*otype
,
153 int signedness
, uint32_t elem_len
)
158 *otype
= OBJECT_TYPE_S8
;
160 *otype
= OBJECT_TYPE_U8
;
164 *otype
= OBJECT_TYPE_S16
;
166 *otype
= OBJECT_TYPE_U16
;
170 *otype
= OBJECT_TYPE_S32
;
172 *otype
= OBJECT_TYPE_U32
;
176 *otype
= OBJECT_TYPE_S64
;
178 *otype
= OBJECT_TYPE_U64
;
186 static int specialize_get_index(struct bytecode_runtime
*runtime
,
187 struct load_op
*insn
, uint64_t index
,
188 struct vstack_entry
*stack_top
,
192 struct filter_get_index_data gid
;
195 memset(&gid
, 0, sizeof(gid
));
196 switch (stack_top
->load
.type
) {
198 switch (stack_top
->load
.object_type
) {
199 case OBJECT_TYPE_ARRAY
:
201 const struct lttng_integer_type
*integer_type
;
202 const struct lttng_event_field
*field
;
203 uint32_t elem_len
, num_elems
;
206 field
= stack_top
->load
.field
;
207 if (!lttng_is_bytewise_integer(field
->type
.u
.array_nestable
.elem_type
)) {
211 integer_type
= &field
->type
.u
.array_nestable
.elem_type
->u
.integer
;
212 num_elems
= field
->type
.u
.array_nestable
.length
;
213 elem_len
= integer_type
->size
;
214 signedness
= integer_type
->signedness
;
215 if (index
>= num_elems
) {
219 ret
= specialize_get_index_object_type(&stack_top
->load
.object_type
,
220 signedness
, elem_len
);
223 gid
.offset
= index
* (elem_len
/ CHAR_BIT
);
224 gid
.array_len
= num_elems
* (elem_len
/ CHAR_BIT
);
225 gid
.elem
.type
= stack_top
->load
.object_type
;
226 gid
.elem
.len
= elem_len
;
227 if (integer_type
->reverse_byte_order
)
228 gid
.elem
.rev_bo
= true;
229 stack_top
->load
.rev_bo
= gid
.elem
.rev_bo
;
232 case OBJECT_TYPE_SEQUENCE
:
234 const struct lttng_integer_type
*integer_type
;
235 const struct lttng_event_field
*field
;
239 field
= stack_top
->load
.field
;
240 if (!lttng_is_bytewise_integer(field
->type
.u
.sequence_nestable
.elem_type
)) {
244 integer_type
= &field
->type
.u
.sequence_nestable
.elem_type
->u
.integer
;
245 elem_len
= integer_type
->size
;
246 signedness
= integer_type
->signedness
;
247 ret
= specialize_get_index_object_type(&stack_top
->load
.object_type
,
248 signedness
, elem_len
);
251 gid
.offset
= index
* (elem_len
/ CHAR_BIT
);
252 gid
.elem
.type
= stack_top
->load
.object_type
;
253 gid
.elem
.len
= elem_len
;
254 if (integer_type
->reverse_byte_order
)
255 gid
.elem
.rev_bo
= true;
256 stack_top
->load
.rev_bo
= gid
.elem
.rev_bo
;
259 case OBJECT_TYPE_STRUCT
:
260 /* Only generated by the specialize phase. */
261 case OBJECT_TYPE_VARIANT
: /* Fall-through */
263 printk(KERN_WARNING
"LTTng: filter: Unexpected get index type %d",
264 (int) stack_top
->load
.object_type
);
269 case LOAD_ROOT_CONTEXT
:
270 case LOAD_ROOT_APP_CONTEXT
:
271 case LOAD_ROOT_PAYLOAD
:
272 printk(KERN_WARNING
"LTTng: filter: Index lookup for root field not implemented yet.\n");
276 data_offset
= bytecode_push_data(runtime
, &gid
,
277 __alignof__(gid
), sizeof(gid
));
278 if (data_offset
< 0) {
284 ((struct get_index_u16
*) insn
->data
)->index
= data_offset
;
287 ((struct get_index_u64
*) insn
->data
)->index
= data_offset
;
300 static int specialize_context_lookup_name(struct lttng_ctx
*ctx
,
301 struct bytecode_runtime
*bytecode
,
302 struct load_op
*insn
)
307 offset
= ((struct get_symbol
*) insn
->data
)->offset
;
308 name
= bytecode
->p
.bc
->bc
.data
+ bytecode
->p
.bc
->bc
.reloc_offset
+ offset
;
309 return lttng_get_context_index(ctx
, name
);
312 static int specialize_load_object(const struct lttng_event_field
*field
,
313 struct vstack_load
*load
, bool is_context
)
315 load
->type
= LOAD_OBJECT
;
317 * LTTng-UST layout all integer fields as s64 on the stack for the filter.
319 switch (field
->type
.atype
) {
321 if (field
->type
.u
.integer
.signedness
)
322 load
->object_type
= OBJECT_TYPE_S64
;
324 load
->object_type
= OBJECT_TYPE_U64
;
325 load
->rev_bo
= false;
327 case atype_enum_nestable
:
329 const struct lttng_integer_type
*itype
=
330 &field
->type
.u
.enum_nestable
.container_type
->u
.integer
;
332 if (itype
->signedness
)
333 load
->object_type
= OBJECT_TYPE_S64
;
335 load
->object_type
= OBJECT_TYPE_U64
;
336 load
->rev_bo
= false;
339 case atype_array_nestable
:
340 if (!lttng_is_bytewise_integer(field
->type
.u
.array_nestable
.elem_type
)) {
341 printk(KERN_WARNING
"LTTng: filter Array nesting only supports integer types.\n");
345 load
->object_type
= OBJECT_TYPE_STRING
;
347 if (field
->type
.u
.array_nestable
.elem_type
->u
.integer
.encoding
== lttng_encode_none
) {
348 load
->object_type
= OBJECT_TYPE_ARRAY
;
351 load
->object_type
= OBJECT_TYPE_STRING_SEQUENCE
;
355 case atype_sequence_nestable
:
356 if (!lttng_is_bytewise_integer(field
->type
.u
.sequence_nestable
.elem_type
)) {
357 printk(KERN_WARNING
"LTTng: filter Sequence nesting only supports integer types.\n");
361 load
->object_type
= OBJECT_TYPE_STRING
;
363 if (field
->type
.u
.sequence_nestable
.elem_type
->u
.integer
.encoding
== lttng_encode_none
) {
364 load
->object_type
= OBJECT_TYPE_SEQUENCE
;
367 load
->object_type
= OBJECT_TYPE_STRING_SEQUENCE
;
372 load
->object_type
= OBJECT_TYPE_STRING
;
374 case atype_struct_nestable
:
375 printk(KERN_WARNING
"LTTng: filter: Structure type cannot be loaded.\n");
377 case atype_variant_nestable
:
378 printk(KERN_WARNING
"LTTng: filter: Variant type cannot be loaded.\n");
381 printk(KERN_WARNING
"LTTng: filter: Unknown type: %d", (int) field
->type
.atype
);
387 static int specialize_context_lookup(struct lttng_ctx
*ctx
,
388 struct bytecode_runtime
*runtime
,
389 struct load_op
*insn
,
390 struct vstack_load
*load
)
393 struct lttng_ctx_field
*ctx_field
;
394 struct lttng_event_field
*field
;
395 struct filter_get_index_data gid
;
398 idx
= specialize_context_lookup_name(ctx
, runtime
, insn
);
402 ctx_field
= <tng_static_ctx
->fields
[idx
];
403 field
= &ctx_field
->event_field
;
404 ret
= specialize_load_object(field
, load
, true);
407 /* Specialize each get_symbol into a get_index. */
408 insn
->op
= FILTER_OP_GET_INDEX_U16
;
409 memset(&gid
, 0, sizeof(gid
));
411 gid
.elem
.type
= load
->object_type
;
412 data_offset
= bytecode_push_data(runtime
, &gid
,
413 __alignof__(gid
), sizeof(gid
));
414 if (data_offset
< 0) {
417 ((struct get_index_u16
*) insn
->data
)->index
= data_offset
;
421 static int specialize_payload_lookup(const struct lttng_event_desc
*event_desc
,
422 struct bytecode_runtime
*runtime
,
423 struct load_op
*insn
,
424 struct vstack_load
*load
)
428 unsigned int i
, nr_fields
;
430 uint32_t field_offset
= 0;
431 const struct lttng_event_field
*field
;
433 struct filter_get_index_data gid
;
436 nr_fields
= event_desc
->nr_fields
;
437 offset
= ((struct get_symbol
*) insn
->data
)->offset
;
438 name
= runtime
->p
.bc
->bc
.data
+ runtime
->p
.bc
->bc
.reloc_offset
+ offset
;
439 for (i
= 0; i
< nr_fields
; i
++) {
440 field
= &event_desc
->fields
[i
];
441 if (field
->nofilter
) {
444 if (!strcmp(field
->name
, name
)) {
448 /* compute field offset on stack */
449 switch (field
->type
.atype
) {
451 case atype_enum_nestable
:
452 field_offset
+= sizeof(int64_t);
454 case atype_array_nestable
:
455 case atype_sequence_nestable
:
456 field_offset
+= sizeof(unsigned long);
457 field_offset
+= sizeof(void *);
460 field_offset
+= sizeof(void *);
472 ret
= specialize_load_object(field
, load
, false);
476 /* Specialize each get_symbol into a get_index. */
477 insn
->op
= FILTER_OP_GET_INDEX_U16
;
478 memset(&gid
, 0, sizeof(gid
));
479 gid
.offset
= field_offset
;
480 gid
.elem
.type
= load
->object_type
;
481 data_offset
= bytecode_push_data(runtime
, &gid
,
482 __alignof__(gid
), sizeof(gid
));
483 if (data_offset
< 0) {
487 ((struct get_index_u16
*) insn
->data
)->index
= data_offset
;
493 int lttng_filter_specialize_bytecode(const struct lttng_event_desc
*event_desc
,
494 struct bytecode_runtime
*bytecode
)
496 void *pc
, *next_pc
, *start_pc
;
498 struct vstack _stack
;
499 struct vstack
*stack
= &_stack
;
500 struct lttng_ctx
*ctx
= bytecode
->p
.ctx
;
504 start_pc
= &bytecode
->code
[0];
505 for (pc
= next_pc
= start_pc
; pc
- start_pc
< bytecode
->len
;
507 switch (*(filter_opcode_t
*) pc
) {
508 case FILTER_OP_UNKNOWN
:
510 printk(KERN_WARNING
"LTTng: filter: unknown bytecode op %u\n",
511 (unsigned int) *(filter_opcode_t
*) pc
);
515 case FILTER_OP_RETURN
:
516 case FILTER_OP_RETURN_S64
:
525 case FILTER_OP_MINUS
:
526 printk(KERN_WARNING
"LTTng: filter: unsupported bytecode op %u\n",
527 (unsigned int) *(filter_opcode_t
*) pc
);
533 struct binary_op
*insn
= (struct binary_op
*) pc
;
535 switch(vstack_ax(stack
)->type
) {
537 printk(KERN_WARNING
"LTTng: filter: unknown register type\n");
542 if (vstack_bx(stack
)->type
== REG_STAR_GLOB_STRING
)
543 insn
->op
= FILTER_OP_EQ_STAR_GLOB_STRING
;
545 insn
->op
= FILTER_OP_EQ_STRING
;
547 case REG_STAR_GLOB_STRING
:
548 insn
->op
= FILTER_OP_EQ_STAR_GLOB_STRING
;
551 if (vstack_bx(stack
)->type
== REG_S64
)
552 insn
->op
= FILTER_OP_EQ_S64
;
554 insn
->op
= FILTER_OP_EQ_DOUBLE_S64
;
557 if (vstack_bx(stack
)->type
== REG_S64
)
558 insn
->op
= FILTER_OP_EQ_S64_DOUBLE
;
560 insn
->op
= FILTER_OP_EQ_DOUBLE
;
564 if (vstack_pop(stack
)) {
568 vstack_ax(stack
)->type
= REG_S64
;
569 next_pc
+= sizeof(struct binary_op
);
575 struct binary_op
*insn
= (struct binary_op
*) pc
;
577 switch(vstack_ax(stack
)->type
) {
579 printk(KERN_WARNING
"LTTng: filter: unknown register type\n");
584 if (vstack_bx(stack
)->type
== REG_STAR_GLOB_STRING
)
585 insn
->op
= FILTER_OP_NE_STAR_GLOB_STRING
;
587 insn
->op
= FILTER_OP_NE_STRING
;
589 case REG_STAR_GLOB_STRING
:
590 insn
->op
= FILTER_OP_NE_STAR_GLOB_STRING
;
593 if (vstack_bx(stack
)->type
== REG_S64
)
594 insn
->op
= FILTER_OP_NE_S64
;
596 insn
->op
= FILTER_OP_NE_DOUBLE_S64
;
599 if (vstack_bx(stack
)->type
== REG_S64
)
600 insn
->op
= FILTER_OP_NE_S64_DOUBLE
;
602 insn
->op
= FILTER_OP_NE_DOUBLE
;
606 if (vstack_pop(stack
)) {
610 vstack_ax(stack
)->type
= REG_S64
;
611 next_pc
+= sizeof(struct binary_op
);
617 struct binary_op
*insn
= (struct binary_op
*) pc
;
619 switch(vstack_ax(stack
)->type
) {
621 printk(KERN_WARNING
"LTTng: filter: unknown register type\n");
625 case REG_STAR_GLOB_STRING
:
626 printk(KERN_WARNING
"LTTng: filter: invalid register type for '>' binary operator\n");
630 insn
->op
= FILTER_OP_GT_STRING
;
633 if (vstack_bx(stack
)->type
== REG_S64
)
634 insn
->op
= FILTER_OP_GT_S64
;
636 insn
->op
= FILTER_OP_GT_DOUBLE_S64
;
639 if (vstack_bx(stack
)->type
== REG_S64
)
640 insn
->op
= FILTER_OP_GT_S64_DOUBLE
;
642 insn
->op
= FILTER_OP_GT_DOUBLE
;
646 if (vstack_pop(stack
)) {
650 vstack_ax(stack
)->type
= REG_S64
;
651 next_pc
+= sizeof(struct binary_op
);
657 struct binary_op
*insn
= (struct binary_op
*) pc
;
659 switch(vstack_ax(stack
)->type
) {
661 printk(KERN_WARNING
"LTTng: filter: unknown register type\n");
665 case REG_STAR_GLOB_STRING
:
666 printk(KERN_WARNING
"LTTng: filter: invalid register type for '<' binary operator\n");
670 insn
->op
= FILTER_OP_LT_STRING
;
673 if (vstack_bx(stack
)->type
== REG_S64
)
674 insn
->op
= FILTER_OP_LT_S64
;
676 insn
->op
= FILTER_OP_LT_DOUBLE_S64
;
679 if (vstack_bx(stack
)->type
== REG_S64
)
680 insn
->op
= FILTER_OP_LT_S64_DOUBLE
;
682 insn
->op
= FILTER_OP_LT_DOUBLE
;
686 if (vstack_pop(stack
)) {
690 vstack_ax(stack
)->type
= REG_S64
;
691 next_pc
+= sizeof(struct binary_op
);
697 struct binary_op
*insn
= (struct binary_op
*) pc
;
699 switch(vstack_ax(stack
)->type
) {
701 printk(KERN_WARNING
"LTTng: filter: unknown register type\n");
705 case REG_STAR_GLOB_STRING
:
706 printk(KERN_WARNING
"LTTng: filter: invalid register type for '>=' binary operator\n");
710 insn
->op
= FILTER_OP_GE_STRING
;
713 if (vstack_bx(stack
)->type
== REG_S64
)
714 insn
->op
= FILTER_OP_GE_S64
;
716 insn
->op
= FILTER_OP_GE_DOUBLE_S64
;
719 if (vstack_bx(stack
)->type
== REG_S64
)
720 insn
->op
= FILTER_OP_GE_S64_DOUBLE
;
722 insn
->op
= FILTER_OP_GE_DOUBLE
;
726 if (vstack_pop(stack
)) {
730 vstack_ax(stack
)->type
= REG_S64
;
731 next_pc
+= sizeof(struct binary_op
);
736 struct binary_op
*insn
= (struct binary_op
*) pc
;
738 switch(vstack_ax(stack
)->type
) {
740 printk(KERN_WARNING
"LTTng: filter: unknown register type\n");
744 case REG_STAR_GLOB_STRING
:
745 printk(KERN_WARNING
"LTTng: filter: invalid register type for '<=' binary operator\n");
749 insn
->op
= FILTER_OP_LE_STRING
;
752 if (vstack_bx(stack
)->type
== REG_S64
)
753 insn
->op
= FILTER_OP_LE_S64
;
755 insn
->op
= FILTER_OP_LE_DOUBLE_S64
;
758 if (vstack_bx(stack
)->type
== REG_S64
)
759 insn
->op
= FILTER_OP_LE_S64_DOUBLE
;
761 insn
->op
= FILTER_OP_LE_DOUBLE
;
764 vstack_ax(stack
)->type
= REG_S64
;
765 next_pc
+= sizeof(struct binary_op
);
769 case FILTER_OP_EQ_STRING
:
770 case FILTER_OP_NE_STRING
:
771 case FILTER_OP_GT_STRING
:
772 case FILTER_OP_LT_STRING
:
773 case FILTER_OP_GE_STRING
:
774 case FILTER_OP_LE_STRING
:
775 case FILTER_OP_EQ_STAR_GLOB_STRING
:
776 case FILTER_OP_NE_STAR_GLOB_STRING
:
777 case FILTER_OP_EQ_S64
:
778 case FILTER_OP_NE_S64
:
779 case FILTER_OP_GT_S64
:
780 case FILTER_OP_LT_S64
:
781 case FILTER_OP_GE_S64
:
782 case FILTER_OP_LE_S64
:
783 case FILTER_OP_EQ_DOUBLE
:
784 case FILTER_OP_NE_DOUBLE
:
785 case FILTER_OP_GT_DOUBLE
:
786 case FILTER_OP_LT_DOUBLE
:
787 case FILTER_OP_GE_DOUBLE
:
788 case FILTER_OP_LE_DOUBLE
:
789 case FILTER_OP_EQ_DOUBLE_S64
:
790 case FILTER_OP_NE_DOUBLE_S64
:
791 case FILTER_OP_GT_DOUBLE_S64
:
792 case FILTER_OP_LT_DOUBLE_S64
:
793 case FILTER_OP_GE_DOUBLE_S64
:
794 case FILTER_OP_LE_DOUBLE_S64
:
795 case FILTER_OP_EQ_S64_DOUBLE
:
796 case FILTER_OP_NE_S64_DOUBLE
:
797 case FILTER_OP_GT_S64_DOUBLE
:
798 case FILTER_OP_LT_S64_DOUBLE
:
799 case FILTER_OP_GE_S64_DOUBLE
:
800 case FILTER_OP_LE_S64_DOUBLE
:
801 case FILTER_OP_BIT_RSHIFT
:
802 case FILTER_OP_BIT_LSHIFT
:
803 case FILTER_OP_BIT_AND
:
804 case FILTER_OP_BIT_OR
:
805 case FILTER_OP_BIT_XOR
:
808 if (vstack_pop(stack
)) {
812 vstack_ax(stack
)->type
= REG_S64
;
813 next_pc
+= sizeof(struct binary_op
);
818 case FILTER_OP_UNARY_PLUS
:
820 struct unary_op
*insn
= (struct unary_op
*) pc
;
822 switch(vstack_ax(stack
)->type
) {
824 printk(KERN_WARNING
"LTTng: filter: unknown register type\n");
829 insn
->op
= FILTER_OP_UNARY_PLUS_S64
;
832 insn
->op
= FILTER_OP_UNARY_PLUS_DOUBLE
;
836 next_pc
+= sizeof(struct unary_op
);
840 case FILTER_OP_UNARY_MINUS
:
842 struct unary_op
*insn
= (struct unary_op
*) pc
;
844 switch(vstack_ax(stack
)->type
) {
846 printk(KERN_WARNING
"LTTng: filter: unknown register type\n");
851 insn
->op
= FILTER_OP_UNARY_MINUS_S64
;
854 insn
->op
= FILTER_OP_UNARY_MINUS_DOUBLE
;
858 next_pc
+= sizeof(struct unary_op
);
862 case FILTER_OP_UNARY_NOT
:
864 struct unary_op
*insn
= (struct unary_op
*) pc
;
866 switch(vstack_ax(stack
)->type
) {
868 printk(KERN_WARNING
"LTTng: filter: unknown register type\n");
873 insn
->op
= FILTER_OP_UNARY_NOT_S64
;
876 insn
->op
= FILTER_OP_UNARY_NOT_DOUBLE
;
880 next_pc
+= sizeof(struct unary_op
);
884 case FILTER_OP_UNARY_BIT_NOT
:
887 next_pc
+= sizeof(struct unary_op
);
891 case FILTER_OP_UNARY_PLUS_S64
:
892 case FILTER_OP_UNARY_MINUS_S64
:
893 case FILTER_OP_UNARY_NOT_S64
:
894 case FILTER_OP_UNARY_PLUS_DOUBLE
:
895 case FILTER_OP_UNARY_MINUS_DOUBLE
:
896 case FILTER_OP_UNARY_NOT_DOUBLE
:
899 next_pc
+= sizeof(struct unary_op
);
907 /* Continue to next instruction */
908 /* Pop 1 when jump not taken */
909 if (vstack_pop(stack
)) {
913 next_pc
+= sizeof(struct logical_op
);
918 case FILTER_OP_LOAD_FIELD_REF
:
920 printk(KERN_WARNING
"LTTng: filter: Unknown field ref type\n");
924 /* get context ref */
925 case FILTER_OP_GET_CONTEXT_REF
:
927 printk(KERN_WARNING
"LTTng: filter: Unknown get context ref type\n");
931 case FILTER_OP_LOAD_FIELD_REF_STRING
:
932 case FILTER_OP_LOAD_FIELD_REF_SEQUENCE
:
933 case FILTER_OP_GET_CONTEXT_REF_STRING
:
934 case FILTER_OP_LOAD_FIELD_REF_USER_STRING
:
935 case FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE
:
937 if (vstack_push(stack
)) {
941 vstack_ax(stack
)->type
= REG_STRING
;
942 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
945 case FILTER_OP_LOAD_FIELD_REF_S64
:
946 case FILTER_OP_GET_CONTEXT_REF_S64
:
948 if (vstack_push(stack
)) {
952 vstack_ax(stack
)->type
= REG_S64
;
953 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
956 case FILTER_OP_LOAD_FIELD_REF_DOUBLE
:
957 case FILTER_OP_GET_CONTEXT_REF_DOUBLE
:
959 if (vstack_push(stack
)) {
963 vstack_ax(stack
)->type
= REG_DOUBLE
;
964 next_pc
+= sizeof(struct load_op
) + sizeof(struct field_ref
);
968 /* load from immediate operand */
969 case FILTER_OP_LOAD_STRING
:
971 struct load_op
*insn
= (struct load_op
*) pc
;
973 if (vstack_push(stack
)) {
977 vstack_ax(stack
)->type
= REG_STRING
;
978 next_pc
+= sizeof(struct load_op
) + strlen(insn
->data
) + 1;
982 case FILTER_OP_LOAD_STAR_GLOB_STRING
:
984 struct load_op
*insn
= (struct load_op
*) pc
;
986 if (vstack_push(stack
)) {
990 vstack_ax(stack
)->type
= REG_STAR_GLOB_STRING
;
991 next_pc
+= sizeof(struct load_op
) + strlen(insn
->data
) + 1;
995 case FILTER_OP_LOAD_S64
:
997 if (vstack_push(stack
)) {
1001 vstack_ax(stack
)->type
= REG_S64
;
1002 next_pc
+= sizeof(struct load_op
)
1003 + sizeof(struct literal_numeric
);
1007 case FILTER_OP_LOAD_DOUBLE
:
1009 if (vstack_push(stack
)) {
1013 vstack_ax(stack
)->type
= REG_DOUBLE
;
1014 next_pc
+= sizeof(struct load_op
)
1015 + sizeof(struct literal_double
);
1020 case FILTER_OP_CAST_TO_S64
:
1022 struct cast_op
*insn
= (struct cast_op
*) pc
;
1024 switch (vstack_ax(stack
)->type
) {
1026 printk(KERN_WARNING
"LTTng: filter: unknown register type\n");
1031 case REG_STAR_GLOB_STRING
:
1032 printk(KERN_WARNING
"LTTng: filter: Cast op can only be applied to numeric or floating point registers\n");
1036 insn
->op
= FILTER_OP_CAST_NOP
;
1039 insn
->op
= FILTER_OP_CAST_DOUBLE_TO_S64
;
1043 vstack_ax(stack
)->type
= REG_S64
;
1044 next_pc
+= sizeof(struct cast_op
);
1047 case FILTER_OP_CAST_DOUBLE_TO_S64
:
1050 vstack_ax(stack
)->type
= REG_S64
;
1051 next_pc
+= sizeof(struct cast_op
);
1054 case FILTER_OP_CAST_NOP
:
1056 next_pc
+= sizeof(struct cast_op
);
1061 * Instructions for recursive traversal through composed types.
1063 case FILTER_OP_GET_CONTEXT_ROOT
:
1065 if (vstack_push(stack
)) {
1069 vstack_ax(stack
)->type
= REG_PTR
;
1070 vstack_ax(stack
)->load
.type
= LOAD_ROOT_CONTEXT
;
1071 next_pc
+= sizeof(struct load_op
);
1074 case FILTER_OP_GET_APP_CONTEXT_ROOT
:
1076 if (vstack_push(stack
)) {
1080 vstack_ax(stack
)->type
= REG_PTR
;
1081 vstack_ax(stack
)->load
.type
= LOAD_ROOT_APP_CONTEXT
;
1082 next_pc
+= sizeof(struct load_op
);
1085 case FILTER_OP_GET_PAYLOAD_ROOT
:
1087 if (vstack_push(stack
)) {
1091 vstack_ax(stack
)->type
= REG_PTR
;
1092 vstack_ax(stack
)->load
.type
= LOAD_ROOT_PAYLOAD
;
1093 next_pc
+= sizeof(struct load_op
);
1097 case FILTER_OP_LOAD_FIELD
:
1099 struct load_op
*insn
= (struct load_op
*) pc
;
1101 WARN_ON_ONCE(vstack_ax(stack
)->type
!= REG_PTR
);
1103 ret
= specialize_load_field(vstack_ax(stack
), insn
);
1107 next_pc
+= sizeof(struct load_op
);
1111 case FILTER_OP_LOAD_FIELD_S8
:
1112 case FILTER_OP_LOAD_FIELD_S16
:
1113 case FILTER_OP_LOAD_FIELD_S32
:
1114 case FILTER_OP_LOAD_FIELD_S64
:
1115 case FILTER_OP_LOAD_FIELD_U8
:
1116 case FILTER_OP_LOAD_FIELD_U16
:
1117 case FILTER_OP_LOAD_FIELD_U32
:
1118 case FILTER_OP_LOAD_FIELD_U64
:
1121 vstack_ax(stack
)->type
= REG_S64
;
1122 next_pc
+= sizeof(struct load_op
);
1126 case FILTER_OP_LOAD_FIELD_STRING
:
1127 case FILTER_OP_LOAD_FIELD_SEQUENCE
:
1130 vstack_ax(stack
)->type
= REG_STRING
;
1131 next_pc
+= sizeof(struct load_op
);
1135 case FILTER_OP_LOAD_FIELD_DOUBLE
:
1138 vstack_ax(stack
)->type
= REG_DOUBLE
;
1139 next_pc
+= sizeof(struct load_op
);
1143 case FILTER_OP_GET_SYMBOL
:
1145 struct load_op
*insn
= (struct load_op
*) pc
;
1147 dbg_printk("op get symbol\n");
1148 switch (vstack_ax(stack
)->load
.type
) {
1150 printk(KERN_WARNING
"LTTng: filter: Nested fields not implemented yet.\n");
1153 case LOAD_ROOT_CONTEXT
:
1154 /* Lookup context field. */
1155 ret
= specialize_context_lookup(ctx
, bytecode
, insn
,
1156 &vstack_ax(stack
)->load
);
1160 case LOAD_ROOT_APP_CONTEXT
:
1163 case LOAD_ROOT_PAYLOAD
:
1164 /* Lookup event payload field. */
1165 ret
= specialize_payload_lookup(event_desc
,
1167 &vstack_ax(stack
)->load
);
1172 next_pc
+= sizeof(struct load_op
) + sizeof(struct get_symbol
);
1176 case FILTER_OP_GET_SYMBOL_FIELD
:
1178 /* Always generated by specialize phase. */
1183 case FILTER_OP_GET_INDEX_U16
:
1185 struct load_op
*insn
= (struct load_op
*) pc
;
1186 struct get_index_u16
*index
= (struct get_index_u16
*) insn
->data
;
1188 dbg_printk("op get index u16\n");
1190 ret
= specialize_get_index(bytecode
, insn
, index
->index
,
1191 vstack_ax(stack
), sizeof(*index
));
1194 next_pc
+= sizeof(struct load_op
) + sizeof(struct get_index_u16
);
1198 case FILTER_OP_GET_INDEX_U64
:
1200 struct load_op
*insn
= (struct load_op
*) pc
;
1201 struct get_index_u64
*index
= (struct get_index_u64
*) insn
->data
;
1203 dbg_printk("op get index u64\n");
1205 ret
= specialize_get_index(bytecode
, insn
, index
->index
,
1206 vstack_ax(stack
), sizeof(*index
));
1209 next_pc
+= sizeof(struct load_op
) + sizeof(struct get_index_u64
);