ltt-tracer.h

   1 #ifndef _LTT_TRACER_H
   2 #define _LTT_TRACER_H
   3
   4 /*
   5  * ltt-tracer.h
   6  *
   7  * Copyright (C) 2005-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  *
   9  * This contains the definitions for the Linux Trace Toolkit tracer.
  10  *
  11  * Dual LGPL v2.1/GPL v2 license.
  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 "ltt-tracer-core.h"
  26 #include "ltt-events.h"
  27
  28 #define LTTNG_VERSION 0
  29 #define LTTNG_PATCHLEVEL 9
  30 #define LTTNG_SUBLEVEL 1
  31
  32 #ifndef CHAR_BIT
  33 #define CHAR_BIT 8
  34 #endif
  35
  36 /* Number of bytes to log with a read/write event */
  37 #define LTT_LOG_RW_SIZE                 32L
  38 #define LTT_MAX_SMALL_SIZE              0xFFFFU
  39
  40 #ifdef RING_BUFFER_ALIGN
  41 #define ltt_alignof(type)       __alignof__(type)
  42 #else
  43 #define ltt_alignof(type)       1
  44 #endif
  45
  46 /* Tracer properties */
  47 #define CTF_MAGIC_NUMBER                0xC1FC1FC1
  48 #define TSDL_MAGIC_NUMBER               0x75D11D57
  49 #define CTF_VERSION_MAJOR               0
  50 #define CTF_VERSION_MINOR               1
  51
  52 /*
  53  * Number of milliseconds to retry before failing metadata writes on buffer full
  54  * condition. (10 seconds)
  55  */
  56 #define LTTNG_METADATA_TIMEOUT_MSEC     10000
  57
  58 #define LTT_RFLAG_EXTENDED              RING_BUFFER_RFLAG_END
  59 #define LTT_RFLAG_END                   (LTT_RFLAG_EXTENDED << 1)
  60
  61 /* Register and unregister function pointers */
  62
  63 enum ltt_module_function {
  64         LTT_FUNCTION_RUN_FILTER,
  65         LTT_FUNCTION_FILTER_CONTROL,
  66         LTT_FUNCTION_STATEDUMP
  67 };
  68
  69 extern int ltt_module_register(enum ltt_module_function name, void *function,
  70                                struct module *owner);
  71 extern void ltt_module_unregister(enum ltt_module_function name);
  72
  73 /* Exported control function */
  74
  75 void ltt_core_register(int (*function)(u8, void *));
  76
  77 void ltt_core_unregister(void);
  78
  79 extern
  80 void ltt_statedump_register_kprobes_dump(void (*callback)(void *call_data));
  81 extern
  82 void ltt_statedump_unregister_kprobes_dump(void (*callback)(void *call_data));
  83
  84 extern void ltt_dump_softirq_vec(void *call_data);
  85
  86 #ifdef CONFIG_HAVE_LTT_DUMP_TABLES
  87 extern void ltt_dump_sys_call_table(void *call_data);
  88 extern void ltt_dump_idt_table(void *call_data);
  89 #else
  90 static inline void ltt_dump_sys_call_table(void *call_data)
  91 {
  92 }
  93
  94 static inline void ltt_dump_idt_table(void *call_data)
  95 {
  96 }
  97 #endif
  98
  99 #endif /* _LTT_TRACER_H */