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 #define inline inline __attribute__((always_inline))
  19
  20 #if defined(__powerpc__) || defined(__powerpc64__)
  21 #ifdef __powerpc64__
  22 #include <ltt/atomic-ppc64.h>
  23 #include <ltt/system-ppc64.h>
  24 #include <asm/timex.h>
  25 #else
  26 #include <ltt/ppc_asm-ppc.h>
  27 #include <ltt/atomic-ppc.h>
  28 #include <ltt/system-ppc.h>
  29 #include <ltt/timex-ppc.h>
  30 #endif
  31 #elif defined(__x86_64__)
  32 #include <ltt/kernelutils-x86_64.h>
  33 #elif defined(__i386__)
  34 #include <ltt/kernelutils-i386.h>
  35 #else
  36 #error "Unsupported architecture"
  37 #endif
  38
  39 #ifndef min
  40 #define min(a,b) ((a)<(b)?(a):(b))
  41 #endif
  42
  43 #ifdef i386
  44 #define __NR_ltt_trace_generic  317
  45 #define __NR_ltt_register_generic       318
  46 #undef NR_syscalls
  47 #define NR_syscalls 319
  48 #endif
  49
  50 #ifdef __x86_64__
  51 #define __NR_ltt_trace_generic  279
  52 #define __NR_ltt_register_generic       280
  53 #undef NR_syscalls
  54 #define NR_syscalls 281
  55 #endif
  56
  57 #ifdef __powerpc__
  58 #define __NR_ltt_trace_generic  301
  59 #define __NR_ltt_register_generic       302
  60 #undef NR_syscalls
  61 #define NR_syscalls 303
  62 #endif
  63
  64 #ifdef __powerpc64__
  65 #define __NR_ltt_trace_generic  301
  66 #define __NR_ltt_register_generic       302
  67 #undef NR_syscalls
  68 #define NR_syscalls 303
  69 #endif
  70
  71
  72
  73 //FIXME : setup for ARM
  74 //FIXME : setup for MIPS
  75
  76 #ifndef _LIBC
  77 // Put in bits/syscall.h
  78 #define SYS_ltt_trace_generic   __NR_ltt_trace_generic
  79 #define SYS_ltt_register_generic        __NR_ltt_register_generic
  80 #endif
  81
  82 #define FACNAME_LEN 32
  83
  84 /* LTT userspace tracing is non blocking by default when buffers are full */
  85 #ifndef LTT_BLOCKING
  86 #define LTT_BLOCKING 0
  87 #endif //LTT_BLOCKING
  88
  89 typedef unsigned int ltt_facility_t;
  90
  91 struct user_facility_info {
  92   char name[FACNAME_LEN];
  93   unsigned int num_events;
  94   size_t alignment;
  95   uint32_t checksum;
  96   size_t int_size;
  97   size_t long_size;
  98   size_t pointer_size;
  99   size_t size_t_size;
 100 };
 101 #if 0
 102 static inline __attribute__((no_instrument_function))
 103 _syscall5(int, ltt_trace_generic, unsigned int, facility_id,
 104         unsigned int, event_id, void *, data, size_t, data_size, int, blocking)
 105 static inline __attribute__((no_instrument_function))
 106 _syscall2(int, ltt_register_generic, unsigned int *, facility_id,
 107         const struct user_facility_info *, info)
 108 #endif //0
 109
 110 #define ltt_register_generic(...)  syscall(__NR_ltt_register_generic, __VA_ARGS__)
 111 #define ltt_trace_generic(...)  syscall(__NR_ltt_trace_generic, __VA_ARGS__)
 112
 113 #ifndef LTT_PACK
 114 /* Calculate the offset needed to align the type */
 115 static inline unsigned int __attribute__((no_instrument_function))
 116         ltt_align(size_t align_drift, size_t size_of_type)
 117 {
 118   size_t alignment = min(sizeof(void*), size_of_type);
 119
 120   return ((alignment - align_drift) & (alignment-1));
 121 }
 122 #define LTT_ALIGN
 123 #else
 124 static inline unsigned int __attribute__((no_instrument_function))
 125                                                                                                                 ltt_align(size_t align_drift,
 126                                       size_t size_of_type)
 127 {
 128   return 0;
 129 }
 130 #define LTT_ALIGN __attribute__((packed))
 131 #endif //LTT_PACK
 132
 133 #ifdef LTT_TRACE_FAST
 134 #include <ltt/ltt-usertrace-fast.h>
 135 #endif //LTT_TRACE_FAST
 136
 137 #endif //_LTT_USERTRACE_H
 138
 139