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> | |
14 | #include <common/dynamic-buffer.h> | |
15 | #include <common/buffer-view.h> | |
16 | ||
17 | /* | |
18 | * No elf-specific comm structure is defined since no elf-specific payload is | |
19 | * currently needed. | |
20 | */ | |
21 | struct lttng_userspace_probe_location_lookup_method_comm { | |
22 | /* enum lttng_userspace_probe_location_lookup_method_type */ | |
23 | int8_t type; | |
24 | /* type-specific payload */ | |
25 | char payload[]; | |
26 | }; | |
27 | ||
28 | /* Common ancestor of all userspace probe location lookup methods. */ | |
29 | struct lttng_userspace_probe_location_lookup_method { | |
30 | enum lttng_userspace_probe_location_lookup_method_type type; | |
31 | }; | |
32 | ||
33 | struct lttng_userspace_probe_location_lookup_method_elf { | |
34 | struct lttng_userspace_probe_location_lookup_method parent; | |
35 | }; | |
36 | ||
f4d0bb2e FD |
37 | struct lttng_userspace_probe_location_lookup_method_sdt { |
38 | struct lttng_userspace_probe_location_lookup_method parent; | |
39 | }; | |
40 | ||
1ce46cfe JG |
41 | struct lttng_userspace_probe_location_comm { |
42 | /* enum lttng_userspace_probe_location_type */ | |
43 | int8_t type; | |
44 | /* | |
45 | * Payload is composed of, in that order, | |
46 | * - type-specific payload | |
47 | * - struct lttng_userspace_probe_location_lookup_method_comm | |
48 | */ | |
49 | char payload[]; | |
50 | }; | |
51 | ||
52 | struct lttng_userspace_probe_location_function_comm { | |
53 | /* Both lengths include the trailing \0. */ | |
54 | uint32_t function_name_len; | |
55 | uint32_t binary_path_len; | |
56 | /* | |
57 | * Payload is composed of, in that order, | |
58 | * - function name (with trailing \0), | |
59 | * - absolute binary path (with trailing \0) | |
60 | */ | |
61 | char payload[]; | |
62 | } LTTNG_PACKED; | |
63 | ||
f4d0bb2e FD |
64 | struct lttng_userspace_probe_location_tracepoint_comm { |
65 | /* The three lengths include the trailing \0. */ | |
66 | uint32_t probe_name_len; | |
67 | uint32_t provider_name_len; | |
68 | uint32_t binary_path_len; | |
69 | /* | |
70 | * Payload is composed of, in that order, | |
71 | * - probe name (with trailing \0), | |
72 | * - provider name (with trailing \0), | |
73 | * - absolute binary path (with trailing \0) | |
74 | */ | |
75 | char payload[]; | |
76 | } LTTNG_PACKED; | |
77 | ||
1ce46cfe JG |
78 | /* Common ancestor of all userspace probe locations. */ |
79 | struct lttng_userspace_probe_location { | |
80 | enum lttng_userspace_probe_location_type type; | |
81 | struct lttng_userspace_probe_location_lookup_method *lookup_method; | |
82 | }; | |
83 | ||
84 | struct lttng_userspace_probe_location_function { | |
85 | struct lttng_userspace_probe_location parent; | |
86 | char *function_name; | |
87 | char *binary_path; | |
88 | /* | |
89 | * binary_fd is a file descriptor to the executable file. It's open | |
90 | * early on to keep the backing inode valid over the course of the | |
91 | * intrumentation and use. It prevents deletion and reuse races. | |
92 | * Set to -1 if not open. | |
93 | */ | |
94 | int binary_fd; | |
9d3981b5 | 95 | enum lttng_userspace_probe_location_function_instrumentation_type instrumentation_type; |
1ce46cfe JG |
96 | }; |
97 | ||
f4d0bb2e FD |
98 | struct lttng_userspace_probe_location_tracepoint { |
99 | struct lttng_userspace_probe_location parent; | |
100 | char *probe_name; | |
101 | char *provider_name; | |
102 | char *binary_path; | |
103 | /* | |
104 | * binary_fd is a file descriptor to the executable file. It's open | |
105 | * early on to keep the backing inode valid over the course of the | |
106 | * intrumentation and use. It prevents deletion and reuse races. | |
107 | * Set to -1 if not open. | |
108 | */ | |
109 | int binary_fd; | |
110 | }; | |
111 | ||
1ce46cfe JG |
112 | LTTNG_HIDDEN |
113 | int lttng_userspace_probe_location_serialize( | |
114 | const struct lttng_userspace_probe_location *location, | |
115 | struct lttng_dynamic_buffer *buffer, | |
116 | int *binary_fd); | |
117 | ||
118 | LTTNG_HIDDEN | |
119 | int lttng_userspace_probe_location_create_from_buffer( | |
120 | const struct lttng_buffer_view *buffer, | |
121 | struct lttng_userspace_probe_location **probe_location); | |
122 | ||
123 | LTTNG_HIDDEN | |
124 | int lttng_userspace_probe_location_function_set_binary_fd( | |
125 | struct lttng_userspace_probe_location *location, int binary_fd); | |
126 | ||
f4d0bb2e FD |
127 | LTTNG_HIDDEN |
128 | int lttng_userspace_probe_location_tracepoint_set_binary_fd( | |
129 | struct lttng_userspace_probe_location *location, int binary_fd); | |
130 | ||
1ce46cfe JG |
131 | /* |
132 | * Returns a version of the location that is serialized to a contiguous region | |
133 | * of memory. Pass NULL to buffer to only get the storage requirement of the | |
134 | * flattened userspace probe location. | |
135 | */ | |
136 | LTTNG_HIDDEN | |
137 | int lttng_userspace_probe_location_flatten( | |
138 | const struct lttng_userspace_probe_location *location, | |
139 | struct lttng_dynamic_buffer *buffer); | |
140 | ||
394357fe FD |
141 | LTTNG_HIDDEN |
142 | struct lttng_userspace_probe_location *lttng_userspace_probe_location_copy( | |
143 | const struct lttng_userspace_probe_location *location); | |
144 | ||
1ce46cfe | 145 | #endif /* LTTNG_USERSPACE_PROBE_INTERNAL_H */ |