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 #elif defined(__x86_64__)
  33 #include <asm/timex.h>
  34 #include <asm/bitops.h>
  35 #include <asm/atomic.h>
  36 #include <asm/system.h>
  37 #else
  38 #include <asm/timex.h>
  39 #include <asm/atomic.h>
  40 #endif
  41
  42 #ifndef min
  43 #define min(a,b) ((a)<(b)?(a):(b))
  44 #endif
  45
  46 #ifdef i386
  47 #define __NR_ltt_trace_generic  317
  48 #define __NR_ltt_register_generic       318
  49 #undef NR_syscalls
  50 #define NR_syscalls 319
  51 #endif
  52
  53 #ifdef __x86_64__
  54 #define __NR_ltt_trace_generic  279
  55 #define __NR_ltt_register_generic       280
  56 #undef NR_syscalls
  57 #define NR_syscalls 281
  58 #endif
  59
  60 #ifdef __powerpc__
  61 #define __NR_ltt_trace_generic  301
  62 #define __NR_ltt_register_generic       302
  63 #undef NR_syscalls
  64 #define NR_syscalls 303
  65 #endif
  66
  67 #ifdef __powerpc64__
  68 #define __NR_ltt_trace_generic  301
  69 #define __NR_ltt_register_generic       302
  70 #undef NR_syscalls
  71 #define NR_syscalls 303
  72 #endif
  73
  74
  75
  76 //FIXME : setup for ARM
  77 //FIXME : setup for MIPS
  78
  79 #ifndef _LIBC
  80 // Put in bits/syscall.h
  81 #define SYS_ltt_trace_generic   __NR_ltt_trace_generic
  82 #define SYS_ltt_register_generic        __NR_ltt_register_generic
  83 #endif
  84
  85 #define FACNAME_LEN 32
  86
  87 /* LTT userspace tracing is non blocking by default when buffers are full */
  88 #ifndef LTT_BLOCKING
  89 #define LTT_BLOCKING 0
  90 #endif //LTT_BLOCKING
  91
  92 typedef unsigned int ltt_facility_t;
  93
  94 struct user_facility_info {
  95   char name[FACNAME_LEN];
  96   unsigned int num_events;
  97   size_t alignment;
  98   uint32_t checksum;
  99   size_t int_size;
 100   size_t long_size;
 101   size_t pointer_size;
 102   size_t size_t_size;
 103 };
 104 #if 0
 105 static inline __attribute__((no_instrument_function))
 106 _syscall5(int, ltt_trace_generic, unsigned int, facility_id,
 107         unsigned int, event_id, void *, data, size_t, data_size, int, blocking)
 108 static inline __attribute__((no_instrument_function))
 109 _syscall2(int, ltt_register_generic, unsigned int *, facility_id,
 110         const struct user_facility_info *, info)
 111 #endif //0
 112
 113 #define ltt_register_generic(...)  syscall(__NR_ltt_register_generic, __VA_ARGS__)
 114 #define ltt_trace_generic(...)  syscall(__NR_ltt_trace_generic, __VA_ARGS__)
 115
 116 #ifndef LTT_PACK
 117 /* Calculate the offset needed to align the type */
 118 static inline unsigned int __attribute__((no_instrument_function))
 119         ltt_align(size_t align_drift, size_t size_of_type)
 120 {
 121   size_t alignment = min(sizeof(void*), size_of_type);
 122
 123   return ((alignment - align_drift) & (alignment-1));
 124 }
 125 #define LTT_ALIGN
 126 #else
 127 static inline unsigned int __attribute__((no_instrument_function))
 128                                                                                                                 ltt_align(size_t align_drift,
 129                                       size_t size_of_type)
 130 {
 131   return 0;
 132 }
 133 #define LTT_ALIGN __attribute__((packed))
 134 #endif //LTT_PACK
 135
 136 #ifdef LTT_TRACE_FAST
 137 #include <ltt/ltt-usertrace-fast.h>
 138 #endif //LTT_TRACE_FAST
 139
 140 #endif //_LTT_USERTRACE_H
 141
 142