ltt-usertrace/ltt/ltt-usertrace.h

   1 /*****************************************************************************
   2  * ltt-usertrace.h
   3  *
   4  * LTT userspace tracing header
   5  *
   6  * Mathieu Desnoyers, March 2006
   7  */
   8
   9 #ifndef _LTT_USERTRACE_H
  10 #define _LTT_USERTRACE_H
  11
  12 #include <errno.h>
  13 #include <syscall.h>
  14 #include <string.h>
  15 #include <stdint.h>
  16 #include <sys/types.h>
  17 #include <linux/unistd.h>
  18
  19 #define inline inline __attribute__((always_inline))
  20
  21 #if defined(__powerpc__) || defined(__powerpc64__)
  22 #ifdef __powerpc64__
  23 #include <ltt/atomic-ppc64.h>
  24 #include <ltt/system-ppc64.h>
  25 #include <asm/timex.h>
  26 #else
  27 #include <ltt/ppc_asm-ppc.h>
  28 #include <ltt/atomic-ppc.h>
  29 #include <ltt/system-ppc.h>
  30 #include <ltt/timex-ppc.h>
  31 #endif
  32 #else
  33 #include <asm/timex.h>
  34 #include <asm/atomic.h>
  35 #endif
  36
  37 #ifndef min
  38 #define min(a,b) ((a)<(b)?(a):(b))
  39 #endif
  40
  41 #ifdef i386
  42 #define __NR_ltt_trace_generic  317
  43 #define __NR_ltt_register_generic       318
  44 #undef NR_syscalls
  45 #define NR_syscalls 319
  46 #endif
  47
  48 #ifdef __powerpc__
  49 #define __NR_ltt_trace_generic  301
  50 #define __NR_ltt_register_generic       302
  51 #undef NR_syscalls
  52 #define NR_syscalls 303
  53 #endif
  54
  55 #ifdef __powerpc64__
  56 #define __NR_ltt_trace_generic  301
  57 #define __NR_ltt_register_generic       302
  58 #undef NR_syscalls
  59 #define NR_syscalls 303
  60 #endif
  61
  62
  63
  64 //FIXME : setup for ARM
  65 //FIXME : setup for MIPS
  66
  67 #ifndef _LIBC
  68 // Put in bits/syscall.h
  69 #define SYS_ltt_trace_generic   __NR_ltt_trace_generic
  70 #define SYS_ltt_register_generic        __NR_ltt_register_generic
  71 #endif
  72
  73 #define FACNAME_LEN 32
  74
  75 /* LTT userspace tracing is non blocking by default when buffers are full */
  76 #ifndef LTT_BLOCKING
  77 #define LTT_BLOCKING 0
  78 #endif //LTT_BLOCKING
  79
  80 typedef unsigned int ltt_facility_t;
  81
  82 struct user_facility_info {
  83   char name[FACNAME_LEN];
  84   unsigned int num_events;
  85   size_t alignment;
  86   uint32_t checksum;
  87   size_t int_size;
  88   size_t long_size;
  89   size_t pointer_size;
  90   size_t size_t_size;
  91 };
  92
  93 static inline __attribute__((no_instrument_function))
  94 _syscall5(int, ltt_trace_generic, unsigned int, facility_id,
  95         unsigned int, event_id, void *, data, size_t, data_size, int, blocking)
  96 static inline __attribute__((no_instrument_function))
  97 _syscall2(int, ltt_register_generic, unsigned int *, facility_id,
  98         const struct user_facility_info *, info)
  99
 100 #ifndef LTT_PACK
 101 /* Calculate the offset needed to align the type */
 102 static inline unsigned int __attribute__((no_instrument_function))
 103                                                                                                                 ltt_align(size_t align_drift,
 104                                       size_t size_of_type)
 105 {
 106   size_t alignment = min(sizeof(void*), size_of_type);
 107
 108   return ((alignment - align_drift) & (alignment-1));
 109 }
 110 #define LTT_ALIGN
 111 #else
 112 static inline unsigned int __attribute__((no_instrument_function))
 113                                                                                                                 ltt_align(size_t align_drift,
 114                                       size_t size_of_type)
 115 {
 116   return 0;
 117 }
 118 #define LTT_ALIGN __attribute__((packed))
 119 #endif //LTT_PACK
 120
 121 #ifdef LTT_TRACE_FAST
 122 #include <ltt/ltt-usertrace-fast.h>
 123 #endif //LTT_TRACE_FAST
 124
 125 #endif //_LTT_USERTRACE_H
 126
 127