include/lttng-kernel.h

   1 /*
   2  * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
   3  *                      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   4  *                      David Goulet <david.goulet@polymtl.ca>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19  */
  20
  21 #ifndef _LTTNG_KERNEL_H
  22 #define _LTTNG_KERNEL_H
  23
  24 #include "lttng-share.h"
  25
  26 #define LTTNG_SYM_NAME_LEN  128
  27
  28 enum lttng_kernel_instrumentation {
  29         LTTNG_KERNEL_TRACEPOINT    = 0,
  30         LTTNG_KERNEL_KPROBE        = 1,
  31         LTTNG_KERNEL_FUNCTION      = 2,
  32 };
  33
  34 /*
  35  * LTTng consumer mode
  36  */
  37 enum lttng_kernel_output {
  38         LTTNG_KERNEL_SPLICE       = 0,
  39         LTTNG_KERNEL_MMAP         = 1,
  40 };
  41
  42 /*
  43  * LTTng DebugFS ABI structures.
  44  *
  45  * This is the kernel ABI copied from lttng-modules tree.
  46  */
  47
  48 /* Either addr is used or symbol_name and offset. */
  49 struct lttng_kernel_kprobe {
  50         uint64_t addr;
  51
  52         uint64_t offset;
  53         char symbol_name[LTTNG_SYM_NAME_LEN];
  54 };
  55
  56 struct lttng_kernel_function_tracer {
  57         char symbol_name[LTTNG_SYM_NAME_LEN];
  58 };
  59
  60 struct lttng_kernel_event {
  61         char name[LTTNG_SYM_NAME_LEN];
  62         enum lttng_kernel_instrumentation instrumentation;
  63         /* Per instrumentation type configuration */
  64         union {
  65                 struct lttng_kernel_kprobe kprobe;
  66                 struct lttng_kernel_function_tracer ftrace;
  67         } u;
  68 };
  69
  70 struct lttng_kernel_tracer_version {
  71         uint32_t version;
  72         uint32_t patchlevel;
  73         uint32_t sublevel;
  74 };
  75
  76 #endif /* _LTTNG_KERNEL_H */