Commit | Line | Data |
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834978fd | 1 | /* |
ab5be9fa | 2 | * Copyright (C) 2014 David Goulet <dgoulet@efficios.com> |
834978fd | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: GPL-2.0-only |
834978fd | 5 | * |
834978fd DG |
6 | */ |
7 | ||
0dbc2034 GB |
8 | #ifndef LTTNG_SYSCALL_H |
9 | #define LTTNG_SYSCALL_H | |
834978fd | 10 | |
28f23191 JG |
11 | #include "trace-kernel.hpp" |
12 | ||
f3985622 | 13 | #include <common/exception.hpp> |
c9e313bc | 14 | #include <common/hashtable/hashtable.hpp> |
f3985622 JG |
15 | #include <common/macros.hpp> |
16 | #include <common/string-utils/c-string-view.hpp> | |
834978fd | 17 | |
28f23191 | 18 | #include <lttng/event.h> |
834978fd DG |
19 | |
20 | /* | |
21 | * Default size of the kernel system call array. With this size, we usually | |
22 | * reallocate twice considering a 32 bit compat layer also. | |
23 | */ | |
28f23191 | 24 | #define SYSCALL_TABLE_INIT_SIZE 256 |
834978fd DG |
25 | |
26 | /* Maximum length of a syscall name. */ | |
28f23191 | 27 | #define SYSCALL_NAME_LEN 255 |
834978fd DG |
28 | |
29 | /* | |
30 | * Represent a kernel syscall and used when we are populating the internal | |
31 | * list. | |
32 | */ | |
33 | struct syscall { | |
f3985622 JG |
34 | syscall(std::uint32_t index_, std::uint32_t bitness_, const lttng::c_string_view name_) : |
35 | index(index_), bitness(bitness_) | |
36 | { | |
37 | if (lttng_strncpy(name, name_.data(), sizeof(name))) { | |
38 | LTTNG_THROW_INVALID_ARGUMENT_ERROR(fmt::format( | |
39 | "Invalid syscall name: name=`{}`, length={}, max_length={}", | |
40 | name_.data(), | |
41 | name_.len(), | |
42 | sizeof(name))); | |
43 | } | |
44 | ||
45 | lttng_ht_node_init_str(&node, name); | |
46 | } | |
47 | ||
48 | std::uint32_t index = 0; | |
49 | std::uint32_t bitness = 0; | |
50 | char name[SYSCALL_NAME_LEN] = {}; | |
834978fd | 51 | /* Used by the list syscalls command. */ |
f3985622 | 52 | struct lttng_ht_node_str node = {}; |
834978fd DG |
53 | }; |
54 | ||
55 | /* | |
56 | * Allocated once when listing all syscalls at boot time. This is an array | |
57 | * indexed by the syscall index provided in the listing. | |
58 | */ | |
f3985622 | 59 | extern std::vector<struct syscall> syscall_table; |
834978fd DG |
60 | |
61 | /* Use to list kernel system calls. */ | |
7d268848 | 62 | int syscall_init_table(int tracer_fd); |
834978fd | 63 | ssize_t syscall_table_list(struct lttng_event **events); |
834978fd | 64 | |
0dbc2034 | 65 | #endif /* LTTNG_SYSCALL_H */ |