src/bin/lttng-sessiond/lttng-syscall.hpp

   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 "trace-kernel.hpp"
  12
  13 #include <common/hashtable/hashtable.hpp>
  14
  15 #include <lttng/event.h>
  16
  17 /*
  18  * Default size of the kernel system call array. With this size, we usually
  19  * reallocate twice considering a 32 bit compat layer also.
  20  */
  21 #define SYSCALL_TABLE_INIT_SIZE 256
  22
  23 /* Maximum length of a syscall name. */
  24 #define SYSCALL_NAME_LEN 255
  25
  26 /*
  27  * Represent a kernel syscall and used when we are populating the internal
  28  * list.
  29  */
  30 struct syscall {
  31         uint32_t index;
  32         uint32_t bitness;
  33         char name[SYSCALL_NAME_LEN];
  34         /* Used by the list syscalls command. */
  35         struct lttng_ht_node_str node;
  36 };
  37
  38 /*
  39  * Allocated once when listing all syscalls at boot time. This is an array
  40  * indexed by the syscall index provided in the listing.
  41  */
  42 extern struct syscall *syscall_table;
  43
  44 /* Use to list kernel system calls. */
  45 int syscall_init_table(int tracer_fd);
  46 ssize_t syscall_table_list(struct lttng_event **events);
  47
  48 #endif /* LTTNG_SYSCALL_H */