src/bin/lttng-sessiond/syscall.h

   1 /*
   2  * Copyright (C) 2014 - David Goulet <dgoulet@efficios.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License, version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program; if not, write to the Free Software Foundation, Inc., 51
  15  * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  16  */
  17
  18 #ifndef SYSCALL_H
  19 #define SYSCALL_H
  20
  21 #include <common/hashtable/hashtable.h>
  22 #include <lttng/event.h>
  23
  24 #include "trace-kernel.h"
  25
  26 /*
  27  * Default size of the kernel system call array. With this size, we usually
  28  * reallocate twice considering a 32 bit compat layer also.
  29  */
  30 #define SYSCALL_TABLE_INIT_SIZE    256
  31
  32 /* Maximum length of a syscall name. */
  33 #define SYSCALL_NAME_LEN           255
  34
  35 /*
  36  * Represent a kernel syscall and used when we are populating the internal
  37  * list.
  38  */
  39 struct syscall {
  40         uint32_t index;
  41         uint32_t bitness;
  42         char name[SYSCALL_NAME_LEN];
  43         /* Used by the list syscalls command. */
  44         struct lttng_ht_node_str node;
  45 };
  46
  47 /*
  48  * Allocated once when listing all syscalls at boot time. This is an array
  49  * indexed by the syscall index provided in the listing.
  50  */
  51 extern struct syscall *syscall_table;
  52
  53 /* Use to list kernel system calls. */
  54 int syscall_init_table(void);
  55 ssize_t syscall_table_list(struct lttng_event **events);
  56 ssize_t syscall_list_channel(struct ltt_kernel_channel *kchan,
  57                 struct lttng_event **_events, size_t size);
  58
  59 #endif /* SYSCALL_H */