lttng-tracer.h

   1 /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) */
   2 #ifndef _LTTNG_TRACER_H
   3 #define _LTTNG_TRACER_H
   4
   5 /*
   6  * lttng-tracer.h
   7  *
   8  * This contains the definitions for the Linux Trace Toolkit Next
   9  * Generation tracer.
  10  *
  11  * Copyright (C) 2005-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  12  */
  13
  14 #include <stdarg.h>
  15 #include <linux/types.h>
  16 #include <linux/limits.h>
  17 #include <linux/list.h>
  18 #include <linux/cache.h>
  19 #include <linux/timex.h>
  20 #include <linux/wait.h>
  21 #include <asm/atomic.h>
  22 #include <asm/local.h>
  23
  24 #include <wrapper/trace-clock.h>
  25 #include <wrapper/compiler.h>
  26 #include <wrapper/vmalloc.h>
  27 #include <lttng-tracer-core.h>
  28 #include <lttng-events.h>
  29
  30 #define LTTNG_MODULES_MAJOR_VERSION 2
  31 #define LTTNG_MODULES_MINOR_VERSION 11
  32 #define LTTNG_MODULES_PATCHLEVEL_VERSION 0
  33 #define LTTNG_MODULES_EXTRAVERSION "-pre"
  34
  35 #define LTTNG_VERSION_NAME              "L-Beer"
  36 #define LTTNG_VERSION_DESCRIPTION       "An alcoholic drink made from yeast-fermented malt flavored with hops."
  37
  38 #ifndef CHAR_BIT
  39 #define CHAR_BIT 8
  40 #endif
  41
  42 /* Number of bytes to log with a read/write event */
  43 #define LTTNG_LOG_RW_SIZE               32L
  44 #define LTTNG_MAX_SMALL_SIZE            0xFFFFU
  45
  46 #ifdef RING_BUFFER_ALIGN
  47 #define lttng_alignof(type)     __alignof__(type)
  48 #else
  49 #define lttng_alignof(type)     1
  50 #endif
  51
  52 /* Tracer properties */
  53 #define CTF_MAGIC_NUMBER                0xC1FC1FC1
  54 #define TSDL_MAGIC_NUMBER               0x75D11D57
  55
  56 /* CTF specification version followed */
  57 #define CTF_SPEC_MAJOR                  1
  58 #define CTF_SPEC_MINOR                  8
  59
  60 /*
  61  * Number of milliseconds to retry before failing metadata writes on buffer full
  62  * condition. (10 seconds)
  63  */
  64 #define LTTNG_METADATA_TIMEOUT_MSEC     10000
  65
  66 #define LTTNG_RFLAG_EXTENDED            RING_BUFFER_RFLAG_END
  67 #define LTTNG_RFLAG_END                 (LTTNG_RFLAG_EXTENDED << 1)
  68
  69 #endif /* _LTTNG_TRACER_H */