attic/usertrace-attic/lttng_usertrace.h

   1
   2 /* LTTng user-space tracing header
   3  *
   4  * Copyright 2006 Mathieu Desnoyers
   5  *
   6  */
   7
   8 #ifndef _LTTNG_USERTRACE_H
   9 #define _LTTNG_USERTRACE_H
  10
  11 #include <errno.h>
  12 #include <syscall.h>
  13
  14 #include <asm/atomic.h>
  15
  16 //Put in asm-i486/unistd.h
  17 #define __NR_ltt_update 294
  18 #define __NR_ltt_switch 295
  19
  20 #undef NR_syscalls
  21 #define NR_syscalls 296
  22
  23 #ifndef _LIBC
  24 // Put in bits/syscall.h
  25 #define SYS_ltt_update  __NR_ltt_update
  26 #define SYS_ltt_switch  __NR_ltt_switch
  27 #endif
  28
  29 struct ltt_buf {
  30         void *start;
  31         size_t length;
  32         atomic_t        offset;
  33         atomic_t        reserve_count;
  34         atomic_t        commit_count;
  35
  36         atomic_t        events_lost;
  37 };
  38
  39 struct lttng_trace_info {
  40         int     active:1;
  41         int destroy:1;
  42         int filter;
  43         atomic_t nesting;
  44         struct {
  45                 struct ltt_buf facilities;
  46                 struct ltt_buf cpu;
  47         } channel;
  48 };
  49
  50
  51 void __lttng_sig_trace_handler(int signo);
  52
  53 /* Call this at the beginning of a new thread, except for the main() */
  54 void lttng_thread_init(void);
  55
  56 void lttng_free_trace_info(struct lttng_trace_info *info);
  57
  58 static inline _syscall1(int, ltt_switch, unsigned long, addr)
  59 static inline _syscall5(int, ltt_update, unsigned long *, cpu_addr, unsigned long *, fac_addr, int *, active, int *, filter, int *, destroy)
  60
  61 #endif //_LTTNG_USERTRACE_H