Commit | Line | Data |
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1ce46cfe | 1 | /* |
ab5be9fa MJ |
2 | * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
3 | * Copyright (C) 2018 Francis Deslauriers <francis.deslauriers@efficios.com> | |
1ce46cfe | 4 | * |
ab5be9fa | 5 | * SPDX-License-Identifier: LGPL-2.1-only |
1ce46cfe | 6 | * |
1ce46cfe JG |
7 | */ |
8 | ||
9 | #ifndef LTTNG_USERSPACE_PROBE_INTERNAL_H | |
10 | #define LTTNG_USERSPACE_PROBE_INTERNAL_H | |
11 | ||
12 | #include <lttng/userspace-probe.h> | |
13 | #include <common/macros.h> | |
fe489250 | 14 | #include <common/fd-handle.h> |
e368fb43 JG |
15 | #include <stdbool.h> |
16 | ||
17 | struct lttng_payload; | |
18 | struct lttng_payload_view; | |
19 | struct lttng_dynamic_buffer; | |
6a751b95 | 20 | struct mi_writer; |
1ce46cfe | 21 | |
dfcfa983 JR |
22 | typedef bool (*userspace_probe_location_equal_cb)( |
23 | const struct lttng_userspace_probe_location *a, | |
24 | const struct lttng_userspace_probe_location *b); | |
959e3c66 JR |
25 | typedef unsigned long (*userspace_probe_location_hash_cb)( |
26 | const struct lttng_userspace_probe_location *location); | |
6a751b95 JR |
27 | typedef enum lttng_error_code (*userspace_probe_location_mi)( |
28 | const struct lttng_userspace_probe_location *location, | |
29 | struct mi_writer); | |
dfcfa983 | 30 | |
1ce46cfe JG |
31 | /* |
32 | * No elf-specific comm structure is defined since no elf-specific payload is | |
33 | * currently needed. | |
34 | */ | |
35 | struct lttng_userspace_probe_location_lookup_method_comm { | |
36 | /* enum lttng_userspace_probe_location_lookup_method_type */ | |
37 | int8_t type; | |
38 | /* type-specific payload */ | |
39 | char payload[]; | |
40 | }; | |
41 | ||
42 | /* Common ancestor of all userspace probe location lookup methods. */ | |
43 | struct lttng_userspace_probe_location_lookup_method { | |
44 | enum lttng_userspace_probe_location_lookup_method_type type; | |
45 | }; | |
46 | ||
47 | struct lttng_userspace_probe_location_lookup_method_elf { | |
48 | struct lttng_userspace_probe_location_lookup_method parent; | |
49 | }; | |
50 | ||
f4d0bb2e FD |
51 | struct lttng_userspace_probe_location_lookup_method_sdt { |
52 | struct lttng_userspace_probe_location_lookup_method parent; | |
53 | }; | |
54 | ||
1ce46cfe JG |
55 | struct lttng_userspace_probe_location_comm { |
56 | /* enum lttng_userspace_probe_location_type */ | |
57 | int8_t type; | |
58 | /* | |
59 | * Payload is composed of, in that order, | |
60 | * - type-specific payload | |
61 | * - struct lttng_userspace_probe_location_lookup_method_comm | |
62 | */ | |
63 | char payload[]; | |
64 | }; | |
65 | ||
66 | struct lttng_userspace_probe_location_function_comm { | |
67 | /* Both lengths include the trailing \0. */ | |
68 | uint32_t function_name_len; | |
69 | uint32_t binary_path_len; | |
70 | /* | |
71 | * Payload is composed of, in that order, | |
72 | * - function name (with trailing \0), | |
73 | * - absolute binary path (with trailing \0) | |
74 | */ | |
75 | char payload[]; | |
76 | } LTTNG_PACKED; | |
77 | ||
f4d0bb2e FD |
78 | struct lttng_userspace_probe_location_tracepoint_comm { |
79 | /* The three lengths include the trailing \0. */ | |
80 | uint32_t probe_name_len; | |
81 | uint32_t provider_name_len; | |
82 | uint32_t binary_path_len; | |
83 | /* | |
84 | * Payload is composed of, in that order, | |
85 | * - probe name (with trailing \0), | |
86 | * - provider name (with trailing \0), | |
87 | * - absolute binary path (with trailing \0) | |
88 | */ | |
89 | char payload[]; | |
90 | } LTTNG_PACKED; | |
91 | ||
1ce46cfe JG |
92 | /* Common ancestor of all userspace probe locations. */ |
93 | struct lttng_userspace_probe_location { | |
94 | enum lttng_userspace_probe_location_type type; | |
95 | struct lttng_userspace_probe_location_lookup_method *lookup_method; | |
dfcfa983 | 96 | userspace_probe_location_equal_cb equal; |
959e3c66 | 97 | userspace_probe_location_hash_cb hash; |
6a751b95 | 98 | userspace_probe_location_hash_cb mi; |
1ce46cfe JG |
99 | }; |
100 | ||
101 | struct lttng_userspace_probe_location_function { | |
102 | struct lttng_userspace_probe_location parent; | |
103 | char *function_name; | |
104 | char *binary_path; | |
105 | /* | |
106 | * binary_fd is a file descriptor to the executable file. It's open | |
107 | * early on to keep the backing inode valid over the course of the | |
108 | * intrumentation and use. It prevents deletion and reuse races. | |
1ce46cfe | 109 | */ |
2cde0510 | 110 | struct fd_handle *binary_fd_handle; |
9d3981b5 | 111 | enum lttng_userspace_probe_location_function_instrumentation_type instrumentation_type; |
1ce46cfe JG |
112 | }; |
113 | ||
f4d0bb2e FD |
114 | struct lttng_userspace_probe_location_tracepoint { |
115 | struct lttng_userspace_probe_location parent; | |
116 | char *probe_name; | |
117 | char *provider_name; | |
118 | char *binary_path; | |
119 | /* | |
120 | * binary_fd is a file descriptor to the executable file. It's open | |
121 | * early on to keep the backing inode valid over the course of the | |
122 | * intrumentation and use. It prevents deletion and reuse races. | |
f4d0bb2e | 123 | */ |
2cde0510 | 124 | struct fd_handle *binary_fd_handle; |
f4d0bb2e FD |
125 | }; |
126 | ||
1ce46cfe JG |
127 | int lttng_userspace_probe_location_serialize( |
128 | const struct lttng_userspace_probe_location *location, | |
e368fb43 | 129 | struct lttng_payload *payload); |
1ce46cfe | 130 | |
e368fb43 JG |
131 | int lttng_userspace_probe_location_create_from_payload( |
132 | struct lttng_payload_view *view, | |
1ce46cfe JG |
133 | struct lttng_userspace_probe_location **probe_location); |
134 | ||
1ce46cfe JG |
135 | /* |
136 | * Returns a version of the location that is serialized to a contiguous region | |
137 | * of memory. Pass NULL to buffer to only get the storage requirement of the | |
138 | * flattened userspace probe location. | |
139 | */ | |
1ce46cfe JG |
140 | int lttng_userspace_probe_location_flatten( |
141 | const struct lttng_userspace_probe_location *location, | |
142 | struct lttng_dynamic_buffer *buffer); | |
143 | ||
394357fe FD |
144 | struct lttng_userspace_probe_location *lttng_userspace_probe_location_copy( |
145 | const struct lttng_userspace_probe_location *location); | |
146 | ||
dfcfa983 JR |
147 | bool lttng_userspace_probe_location_lookup_method_is_equal( |
148 | const struct lttng_userspace_probe_location_lookup_method *a, | |
149 | const struct lttng_userspace_probe_location_lookup_method *b); | |
150 | ||
dfcfa983 JR |
151 | bool lttng_userspace_probe_location_is_equal( |
152 | const struct lttng_userspace_probe_location *a, | |
153 | const struct lttng_userspace_probe_location *b); | |
154 | ||
959e3c66 JR |
155 | unsigned long lttng_userspace_probe_location_hash( |
156 | const struct lttng_userspace_probe_location *location); | |
157 | ||
6a751b95 JR |
158 | enum lttng_error_code lttng_userspace_probe_location_mi_serialize( |
159 | const struct lttng_userspace_probe_location *location, | |
160 | struct mi_writer *writer); | |
161 | ||
1ce46cfe | 162 | #endif /* LTTNG_USERSPACE_PROBE_INTERNAL_H */ |