lttng-tracer.h

   1 #ifndef _LTTNG_TRACER_H
   2 #define _LTTNG_TRACER_H
   3
   4 /*
   5  * lttng-tracer.h
   6  *
   7  * This contains the definitions for the Linux Trace Toolkit Next
   8  * Generation tracer.
   9  *
  10  * Copyright (C) 2005-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  11  *
  12  * This library is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU Lesser General Public
  14  * License as published by the Free Software Foundation; only
  15  * version 2.1 of the License.
  16  *
  17  * This library is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  20  * Lesser General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Lesser General Public
  23  * License along with this library; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  25  */
  26
  27 #include <stdarg.h>
  28 #include <linux/types.h>
  29 #include <linux/limits.h>
  30 #include <linux/list.h>
  31 #include <linux/cache.h>
  32 #include <linux/timex.h>
  33 #include <linux/wait.h>
  34 #include <asm/atomic.h>
  35 #include <asm/local.h>
  36
  37 #include "wrapper/trace-clock.h"
  38 #include "lttng-tracer-core.h"
  39 #include "lttng-events.h"
  40
  41 #define LTTNG_MODULES_MAJOR_VERSION 2
  42 #define LTTNG_MODULES_MINOR_VERSION 0
  43 #define LTTNG_MODULES_PATCHLEVEL_VERSION 0
  44
  45 #define LTTNG_VERSION_NAME              "Annedd'ale"
  46 #define LTTNG_VERSION_DESCRIPTION       \
  47         "New type of beer, 100% from Quebec, flavored with sapin beaumier needles, with a touch of hops."
  48
  49 #ifndef CHAR_BIT
  50 #define CHAR_BIT 8
  51 #endif
  52
  53 /* Number of bytes to log with a read/write event */
  54 #define LTTNG_LOG_RW_SIZE               32L
  55 #define LTTNG_MAX_SMALL_SIZE            0xFFFFU
  56
  57 #ifdef RING_BUFFER_ALIGN
  58 #define lttng_alignof(type)     __alignof__(type)
  59 #else
  60 #define lttng_alignof(type)     1
  61 #endif
  62
  63 /* Tracer properties */
  64 #define CTF_MAGIC_NUMBER                0xC1FC1FC1
  65 #define TSDL_MAGIC_NUMBER               0x75D11D57
  66
  67 /* CTF specification version followed */
  68 #define CTF_SPEC_MAJOR                  1
  69 #define CTF_SPEC_MINOR                  8
  70
  71 /*
  72  * Number of milliseconds to retry before failing metadata writes on buffer full
  73  * condition. (10 seconds)
  74  */
  75 #define LTTNG_METADATA_TIMEOUT_MSEC     10000
  76
  77 #define LTTNG_RFLAG_EXTENDED            RING_BUFFER_RFLAG_END
  78 #define LTTNG_RFLAG_END                 (LTTNG_RFLAG_EXTENDED << 1)
  79
  80 #endif /* _LTTNG_TRACER_H */