sessiond: Implement UST event notifier error counter
[lttng-tools.git] / src / bin / lttng-sessiond / lttng-syscall.h
1 /*
2 * Copyright (C) 2014 David Goulet <dgoulet@efficios.com>
3 *
4 * SPDX-License-Identifier: GPL-2.0-only
5 *
6 */
7
8 #ifndef LTTNG_SYSCALL_H
9 #define LTTNG_SYSCALL_H
10
11 #include <common/hashtable/hashtable.h>
12 #include <lttng/event.h>
13
14 #include "trace-kernel.h"
15
16 /*
17 * Default size of the kernel system call array. With this size, we usually
18 * reallocate twice considering a 32 bit compat layer also.
19 */
20 #define SYSCALL_TABLE_INIT_SIZE 256
21
22 /* Maximum length of a syscall name. */
23 #define SYSCALL_NAME_LEN 255
24
25 /*
26 * Represent a kernel syscall and used when we are populating the internal
27 * list.
28 */
29 struct syscall {
30 uint32_t index;
31 uint32_t bitness;
32 char name[SYSCALL_NAME_LEN];
33 /* Used by the list syscalls command. */
34 struct lttng_ht_node_str node;
35 };
36
37 /*
38 * Allocated once when listing all syscalls at boot time. This is an array
39 * indexed by the syscall index provided in the listing.
40 */
41 extern struct syscall *syscall_table;
42
43 /* Use to list kernel system calls. */
44 int syscall_init_table(int tracer_fd);
45 ssize_t syscall_table_list(struct lttng_event **events);
46
47 #endif /* LTTNG_SYSCALL_H */
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