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2463b787 JR |
1 | /* |
2 | * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: LGPL-2.1-only | |
5 | * | |
6 | */ | |
7 | ||
8 | #ifndef LTTNG_CONDITION_event_rule_INTERNAL_H | |
9 | #define LTTNG_CONDITION_event_rule_INTERNAL_H | |
10 | ||
11 | #include <lttng/condition/condition-internal.h> | |
12 | #include <common/buffer-view.h> | |
13 | #include <common/macros.h> | |
14 | #include <lttng/condition/evaluation-internal.h> | |
15 | #include <common/dynamic-array.h> | |
16 | #include <lttng/event-field-value.h> | |
17 | ||
18 | struct lttng_capture_descriptor { | |
19 | /* The index at which the capture for this descriptor in the received | |
20 | * payload from the tracer. This is populated on sessiond side. | |
21 | * -1 is uninitialized. | |
22 | * This is necessary since a single trigger can have multiple notify | |
23 | * action, only an ordered set of capture desciptor is passed to the tracer. | |
24 | */ | |
25 | int32_t capture_index; | |
26 | struct lttng_event_expr *event_expression; | |
27 | }; | |
28 | ||
29 | struct lttng_condition_event_rule { | |
30 | struct lttng_condition parent; | |
31 | struct lttng_event_rule *rule; | |
32 | ||
33 | /* Array of `struct lttng_capture_descriptor *` */ | |
34 | struct lttng_dynamic_pointer_array capture_descriptors; | |
35 | }; | |
36 | ||
37 | struct lttng_evaluation_event_rule { | |
38 | struct lttng_evaluation parent; | |
39 | char *name; | |
40 | ||
41 | /* MessagePack-encoded captured event field values */ | |
42 | struct lttng_dynamic_buffer capture_payload; | |
43 | ||
44 | /* | |
45 | * The content of this array event field value is the decoded | |
46 | * version of `capture_payload` above. | |
47 | * | |
48 | * This is a cache: it's not serialized/deserialized in | |
49 | * communications from/to the library and the session daemon. | |
50 | */ | |
51 | struct lttng_event_field_value *captured_values; | |
52 | }; | |
53 | ||
54 | struct lttng_evaluation_event_rule_comm { | |
55 | uint32_t trigger_name_length; | |
56 | /* Trigger name */ | |
57 | char payload[]; | |
58 | } LTTNG_PACKED; | |
59 | ||
60 | struct lttng_condition_event_rule_capture_bytecode_element | |
61 | { | |
62 | struct lttng_event_expr *expression; | |
63 | struct lttng_bytecode *bytecode; | |
64 | }; | |
65 | ||
66 | LTTNG_HIDDEN | |
67 | ssize_t lttng_condition_event_rule_create_from_payload( | |
68 | struct lttng_payload_view *view, | |
69 | struct lttng_condition **condition); | |
70 | ||
71 | LTTNG_HIDDEN | |
72 | enum lttng_condition_status | |
73 | lttng_condition_event_rule_get_rule_mutable( | |
74 | const struct lttng_condition *condition, | |
75 | struct lttng_event_rule **rule); | |
76 | ||
77 | LTTNG_HIDDEN | |
78 | struct lttng_evaluation *lttng_evaluation_event_rule_create( | |
79 | const struct lttng_condition_event_rule *condition, | |
80 | const char* trigger_name, | |
81 | const char *capture_payload, size_t capture_payload_size, | |
82 | bool decode_capture_payload); | |
83 | ||
84 | LTTNG_HIDDEN | |
85 | ssize_t lttng_evaluation_event_rule_create_from_payload( | |
86 | const struct lttng_condition_event_rule *condition, | |
87 | struct lttng_payload_view *view, | |
88 | struct lttng_evaluation **_evaluation); | |
89 | ||
90 | /* | |
91 | * The returned `lttng_dynamic_pointer_array` contains a index ordered set of | |
92 | * `lttng_condition_event_rule_capture_bytecode_element`. | |
93 | * This ensure that minimal work will be done by the tracer for cases where | |
94 | * multiple identical capture expression are present. | |
95 | */ | |
96 | LTTNG_HIDDEN | |
97 | enum lttng_error_code | |
98 | lttng_condition_event_rule_generate_capture_descriptor_bytecode_set( | |
99 | struct lttng_condition *condition, | |
100 | struct lttng_dynamic_pointer_array *bytecode_set); | |
101 | ||
102 | LTTNG_HIDDEN | |
103 | struct lttng_capture_descriptor * | |
104 | lttng_condition_event_rule_get_internal_capture_descriptor_at_index( | |
105 | const struct lttng_condition *condition, unsigned int index); | |
106 | ||
107 | #endif /* LTTNG_CONDITION_event_rule_INTERNAL_H */ |