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 #elif defined(__arm__)
  41 #include <ltt/kernelutils-arm.h>
  42 #else
  43 #error "Unsupported architecture"
  44 #endif
  45
  46 #ifndef min
  47 #define min(a,b) ((a)<(b)?(a):(b))
  48 #endif
  49
  50 #ifdef i386
  51 #define __NR_ltt_trace_generic  326
  52 #define __NR_ltt_register_generic       327
  53 #undef NR_syscalls
  54 #define NR_syscalls 328
  55 #endif
  56
  57 #ifdef __x86_64__
  58 #define __NR_ltt_trace_generic  284
  59 #define __NR_ltt_register_generic       285
  60 #undef NR_syscalls
  61 #define NR_syscalls 286
  62 #endif
  63
  64 #ifdef __powerpc__
  65 #define __NR_ltt_trace_generic  304
  66 #define __NR_ltt_register_generic       305
  67 #undef NR_syscalls
  68 #define NR_syscalls 306
  69 #endif
  70
  71 #ifdef __powerpc64__
  72 #define __NR_ltt_trace_generic  304
  73 #define __NR_ltt_register_generic       305
  74 #undef NR_syscalls
  75 #define NR_syscalls 306
  76 #endif
  77
  78 #ifdef __arm__
  79 #define __NR_ltt_trace_generic  348
  80 #define __NR_ltt_register_generic       349
  81 #undef NR_syscalls
  82 #define NR_syscalls 350
  83 #endif
  84
  85 //FIXME : setup for MIPS
  86
  87 #ifndef _LIBC
  88 // Put in bits/syscall.h
  89 #define SYS_ltt_trace_generic   __NR_ltt_trace_generic
  90 #define SYS_ltt_register_generic        __NR_ltt_register_generic
  91 #endif
  92
  93 #define FACNAME_LEN 32
  94
  95 /* LTT userspace tracing is non blocking by default when buffers are full */
  96 #ifndef LTT_BLOCKING
  97 #define LTT_BLOCKING 0
  98 #endif //LTT_BLOCKING
  99
 100 typedef unsigned int ltt_facility_t;
 101
 102 struct user_facility_info {
 103   char name[FACNAME_LEN];
 104   unsigned int num_events;
 105   size_t alignment;
 106   uint32_t checksum;
 107   size_t int_size;
 108   size_t long_size;
 109   size_t pointer_size;
 110   size_t size_t_size;
 111 };
 112 #if 0
 113 static inline __attribute__((no_instrument_function))
 114 _syscall5(int, ltt_trace_generic, unsigned int, facility_id,
 115         unsigned int, event_id, void *, data, size_t, data_size, int, blocking)
 116 static inline __attribute__((no_instrument_function))
 117 _syscall2(int, ltt_register_generic, unsigned int *, facility_id,
 118         const struct user_facility_info *, info)
 119 #endif //0
 120
 121 #define ltt_register_generic(...)  syscall(__NR_ltt_register_generic, __VA_ARGS__)
 122 #define ltt_trace_generic(...)  syscall(__NR_ltt_trace_generic, __VA_ARGS__)
 123
 124 static inline unsigned int __attribute__((no_instrument_function))
 125         ltt_align(size_t align_drift, size_t size_of_type);
 126
 127 #ifndef LTT_PACK
 128 /* Calculate the offset needed to align the type */
 129 static inline unsigned int
 130         ltt_align(size_t align_drift, size_t size_of_type)
 131 {
 132   size_t alignment = min(sizeof(void*), size_of_type);
 133
 134   return ((alignment - align_drift) & (alignment-1));
 135 }
 136 #define LTT_ALIGN
 137 #else
 138 static inline unsigned int ltt_align(size_t align_drift, size_t size_of_type)
 139 {
 140   return 0;
 141 }
 142 #define LTT_ALIGN __attribute__((packed))
 143 #endif //LTT_PACK
 144
 145 #ifdef __cplusplus
 146 } /* end of extern "C" */
 147 #endif
 148
 149 #ifdef LTT_TRACE_FAST
 150 #include <ltt/ltt-usertrace-fast.h>
 151 #endif //LTT_TRACE_FAST
 152
 153 #endif //_LTT_USERTRACE_H