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; only version 2
   9  * of the License.
  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 /*
  29  * LTTng DebugFS ABI structures.
  30  *
  31  * This is the kernel ABI copied from lttng-modules tree.
  32  */
  33
  34 enum lttng_kernel_instrumentation {
  35         LTTNG_KERNEL_TRACEPOINT    = 0,
  36         LTTNG_KERNEL_KPROBE        = 1,
  37         LTTNG_KERNEL_FUNCTION      = 2,
  38         LTTNG_KERNEL_KRETPROBE     = 3,
  39 };
  40
  41 enum lttng_kernel_context_type {
  42         LTTNG_KERNEL_CONTEXT_PID            = 0,
  43         LTTNG_KERNEL_CONTEXT_PERF_COUNTER   = 1,
  44         LTTNG_KERNEL_CONTEXT_COMM           = 2,
  45         LTTNG_KERNEL_CONTEXT_PRIO           = 3,
  46         LTTNG_KERNEL_CONTEXT_NICE           = 4,
  47         LTTNG_KERNEL_CONTEXT_VPID           = 5,
  48         LTTNG_KERNEL_CONTEXT_TID            = 6,
  49         LTTNG_KERNEL_CONTEXT_VTID           = 7,
  50         LTTNG_KERNEL_CONTEXT_PPID           = 8,
  51         LTTNG_KERNEL_CONTEXT_VPPID          = 9,
  52 };
  53
  54 /* Perf counter attributes */
  55 struct lttng_kernel_perf_counter_ctx {
  56         uint32_t type;
  57         uint64_t config;
  58         char name[LTTNG_SYMBOL_NAME_LEN];
  59 };
  60
  61 /* Event/Channel context */
  62 struct lttng_kernel_context {
  63         enum lttng_kernel_context_type ctx;
  64         union {
  65                 struct lttng_kernel_perf_counter_ctx perf_counter;
  66         } u;
  67 };
  68
  69 struct lttng_kernel_kretprobe {
  70         uint64_t addr;
  71
  72         uint64_t offset;
  73         char symbol_name[LTTNG_SYM_NAME_LEN];
  74 };
  75
  76 /*
  77  * Either addr is used, or symbol_name and offset.
  78  */
  79 struct lttng_kernel_kprobe {
  80         uint64_t addr;
  81
  82         uint64_t offset;
  83         char symbol_name[LTTNG_SYM_NAME_LEN];
  84 };
  85
  86 /* Function tracer */
  87 struct lttng_kernel_function {
  88         char symbol_name[LTTNG_SYM_NAME_LEN];
  89 };
  90
  91 struct lttng_kernel_event {
  92         char name[LTTNG_SYM_NAME_LEN];
  93         enum lttng_kernel_instrumentation instrumentation;
  94         /* Per instrumentation type configuration */
  95         union {
  96                 struct lttng_kernel_kretprobe kretprobe;
  97                 struct lttng_kernel_kprobe kprobe;
  98                 struct lttng_kernel_function ftrace;
  99         } u;
 100 };
 101
 102 struct lttng_kernel_tracer_version {
 103         uint32_t version;
 104         uint32_t patchlevel;
 105         uint32_t sublevel;
 106 };
 107
 108 enum lttng_kernel_calibrate_type {
 109         LTTNG_KERNEL_CALIBRATE_KRETPROBE,
 110 };
 111
 112 struct lttng_kernel_calibrate {
 113         enum lttng_kernel_calibrate_type type;  /* type (input) */
 114 };
 115
 116 #endif /* _LTTNG_KERNEL_H */