Add base support for event rule hit
[lttng-tools.git] / include / lttng / kernel-probe-internal.h
1 /*
2 * Copyright (C) 2020 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
3 *
4 * SPDX-License-Identifier: LGPL-2.1-only
5 *
6 */
7
8 #ifndef LTTNG_KERNEL_PROBE_INTERNAL_H
9 #define LTTNG_KERNEL_PROBE_INTERNAL_H
10
11 #include <common/fd-handle.h>
12 #include <common/macros.h>
13 #include <lttng/kernel-probe.h>
14 #include <stdbool.h>
15 #include <stdint.h>
16 #include <sys/types.h>
17
18 struct lttng_payload;
19 struct lttng_payload_view;
20 struct lttng_dynamic_buffer;
21
22 typedef bool (*kernel_probe_location_equal_cb)(
23 const struct lttng_kernel_probe_location *a,
24 const struct lttng_kernel_probe_location *b);
25 typedef int (*kernel_probe_location_serialize_cb)(
26 const struct lttng_kernel_probe_location *kernel_probe_location,
27 struct lttng_payload *payload);
28 typedef bool (*kernel_probe_location_equal_cb)(
29 const struct lttng_kernel_probe_location *a,
30 const struct lttng_kernel_probe_location *b);
31 typedef ssize_t (*kernel_probe_location_create_from_payload_cb)(
32 struct lttng_payload_view *view,
33 struct lttng_kernel_probe_location **kernel_probe_location);
34 typedef unsigned long (*kernel_probe_location_hash_cb)(
35 const struct lttng_kernel_probe_location *location);
36
37 struct lttng_kernel_probe_location_comm {
38 /* enum lttng_kernel_probe_location_type */
39 int8_t type;
40 /*
41 * Payload is composed of, in that order,
42 * - type-specific payload
43 */
44 char payload[];
45 } LTTNG_PACKED;
46
47 struct lttng_kernel_probe_location_symbol_comm {
48 /* Includes the trailing \0. */
49 uint32_t symbol_len;
50 /* The offset from the symbol. */
51 uint64_t offset;
52 /*
53 * Payload is composed of, in that order,
54 * - symbol name (with trailing \0).
55 */
56 char payload[];
57 } LTTNG_PACKED;
58
59 struct lttng_kernel_probe_location_address_comm {
60 uint64_t address;
61 } LTTNG_PACKED;
62
63 /* Common ancestor of all kernel probe locations. */
64 struct lttng_kernel_probe_location {
65 enum lttng_kernel_probe_location_type type;
66 kernel_probe_location_equal_cb equal;
67 kernel_probe_location_serialize_cb serialize;
68 kernel_probe_location_hash_cb hash;
69 };
70
71 struct lttng_kernel_probe_location_symbol {
72 struct lttng_kernel_probe_location parent;
73 char *symbol_name;
74 uint64_t offset;
75 };
76
77 struct lttng_kernel_probe_location_address {
78 struct lttng_kernel_probe_location parent;
79 uint64_t address;
80 };
81
82 LTTNG_HIDDEN
83 int lttng_kernel_probe_location_serialize(
84 const struct lttng_kernel_probe_location *location,
85 struct lttng_payload *payload);
86
87 LTTNG_HIDDEN
88 ssize_t lttng_kernel_probe_location_create_from_payload(
89 struct lttng_payload_view *view,
90 struct lttng_kernel_probe_location **probe_location);
91
92 LTTNG_HIDDEN
93 bool lttng_kernel_probe_location_is_equal(
94 const struct lttng_kernel_probe_location *a,
95 const struct lttng_kernel_probe_location *b);
96
97 LTTNG_HIDDEN
98 struct lttng_kernel_probe_location *lttng_kernel_probe_location_copy(
99 const struct lttng_kernel_probe_location *location);
100
101 LTTNG_HIDDEN
102 unsigned long lttng_kernel_probe_location_hash(
103 const struct lttng_kernel_probe_location *location);
104
105 #endif /* LTTNG_KERNEL_PROBE_INTERNAL_H */
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