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 */