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
  18 #ifdef __cplusplus
  19 extern "C" {
  20 #endif
  21
  22
  23 #define inline inline __attribute__((always_inline))
  24
  25 #if defined(__powerpc__) || defined(__powerpc64__)
  26 #ifdef __powerpc64__
  27 #include <ltt/atomic-ppc64.h>
  28 #include <ltt/system-ppc64.h>
  29 #include <asm/timex.h>
  30 #else
  31 #include <ltt/ppc_asm-ppc.h>
  32 #include <ltt/atomic-ppc.h>
  33 #include <ltt/system-ppc.h>
  34 #include <ltt/timex-ppc.h>
  35 #endif
  36 #elif defined(__x86_64__)
  37 #include <ltt/kernelutils-x86_64.h>
  38 #elif defined(__i386__)
  39 #include <ltt/kernelutils-i386.h>
  40 #else
  41 #error "Unsupported architecture"
  42 #endif
  43
  44 #ifndef min
  45 #define min(a,b) ((a)<(b)?(a):(b))
  46 #endif
  47
  48 #ifdef i386
  49 #define __NR_ltt_trace_generic  318
  50 #define __NR_ltt_register_generic       319
  51 #undef NR_syscalls
  52 #define NR_syscalls 320
  53 #endif
  54
  55 #ifdef __x86_64__
  56 #define __NR_ltt_trace_generic  281
  57 #define __NR_ltt_register_generic       281
  58 #undef NR_syscalls
  59 #define NR_syscalls 282
  60 #endif
  61
  62 #ifdef __powerpc__
  63 #define __NR_ltt_trace_generic  301
  64 #define __NR_ltt_register_generic       302
  65 #undef NR_syscalls
  66 #define NR_syscalls 303
  67 #endif
  68
  69 #ifdef __powerpc64__
  70 #define __NR_ltt_trace_generic  301
  71 #define __NR_ltt_register_generic       302
  72 #undef NR_syscalls
  73 #define NR_syscalls 303
  74 #endif
  75
  76
  77
  78 //FIXME : setup for ARM
  79 //FIXME : setup for MIPS
  80
  81 #ifndef _LIBC
  82 // Put in bits/syscall.h
  83 #define SYS_ltt_trace_generic   __NR_ltt_trace_generic
  84 #define SYS_ltt_register_generic        __NR_ltt_register_generic
  85 #endif
  86
  87 #define FACNAME_LEN 32
  88
  89 /* LTT userspace tracing is non blocking by default when buffers are full */
  90 #ifndef LTT_BLOCKING
  91 #define LTT_BLOCKING 0
  92 #endif //LTT_BLOCKING
  93
  94 typedef unsigned int ltt_facility_t;
  95
  96 struct user_facility_info {
  97   char name[FACNAME_LEN];
  98   unsigned int num_events;
  99   size_t alignment;
 100   uint32_t checksum;
 101   size_t int_size;
 102   size_t long_size;
 103   size_t pointer_size;
 104   size_t size_t_size;
 105 };
 106 #if 0
 107 static inline __attribute__((no_instrument_function))
 108 _syscall5(int, ltt_trace_generic, unsigned int, facility_id,
 109         unsigned int, event_id, void *, data, size_t, data_size, int, blocking)
 110 static inline __attribute__((no_instrument_function))
 111 _syscall2(int, ltt_register_generic, unsigned int *, facility_id,
 112         const struct user_facility_info *, info)
 113 #endif //0
 114
 115 #define ltt_register_generic(...)  syscall(__NR_ltt_register_generic, __VA_ARGS__)
 116 #define ltt_trace_generic(...)  syscall(__NR_ltt_trace_generic, __VA_ARGS__)
 117
 118 static inline unsigned int __attribute__((no_instrument_function))
 119         ltt_align(size_t align_drift, size_t size_of_type);
 120
 121 #ifndef LTT_PACK
 122 /* Calculate the offset needed to align the type */
 123 static inline unsigned int
 124         ltt_align(size_t align_drift, size_t size_of_type)
 125 {
 126   size_t alignment = min(sizeof(void*), size_of_type);
 127
 128   return ((alignment - align_drift) & (alignment-1));
 129 }
 130 #define LTT_ALIGN
 131 #else
 132 static inline unsigned int ltt_align(size_t align_drift, size_t size_of_type)
 133 {
 134   return 0;
 135 }
 136 #define LTT_ALIGN __attribute__((packed))
 137 #endif //LTT_PACK
 138
 139 #ifdef __cplusplus
 140 } /* end of extern "C" */
 141 #endif
 142
 143 #ifdef LTT_TRACE_FAST
 144 #include <ltt/ltt-usertrace-fast.h>
 145 #endif //LTT_TRACE_FAST
 146
 147 #endif //_LTT_USERTRACE_H