kernel/trace/trace_entries.h

   1 /*
   2  * This file defines the trace event structures that go into the ring
   3  * buffer directly. They are created via macros so that changes for them
   4  * appear in the format file. Using macros will automate this process.
   5  *
   6  * The macro used to create a ftrace data structure is:
   7  *
   8  * FTRACE_ENTRY( name, struct_name, id, structure, print )
   9  *
  10  * @name: the name used the event name, as well as the name of
  11  *   the directory that holds the format file.
  12  *
  13  * @struct_name: the name of the structure that is created.
  14  *
  15  * @id: The event identifier that is used to detect what event
  16  *    this is from the ring buffer.
  17  *
  18  * @structure: the structure layout
  19  *
  20  *  - __field(  type,   item    )
  21  *        This is equivalent to declaring
  22  *              type    item;
  23  *        in the structure.
  24  *  - __array(  type,   item,   size    )
  25  *        This is equivalent to declaring
  26  *              type    item[size];
  27  *        in the structure.
  28  *
  29  *   * for structures within structures, the format of the internal
  30  *      structure is laid out. This allows the internal structure
  31  *      to be deciphered for the format file. Although these macros
  32  *      may become out of sync with the internal structure, they
  33  *      will create a compile error if it happens. Since the
  34  *      internel structures are just tracing helpers, this is not
  35  *      an issue.
  36  *
  37  *      When an internal structure is used, it should use:
  38  *
  39  *      __field_struct( type,   item    )
  40  *
  41  *      instead of __field. This will prevent it from being shown in
  42  *      the output file. The fields in the structure should use.
  43  *
  44  *      __field_desc(   type,   container,      item            )
  45  *      __array_desc(   type,   container,      item,   len     )
  46  *
  47  *      type, item and len are the same as __field and __array, but
  48  *      container is added. This is the name of the item in
  49  *      __field_struct that this is describing.
  50  *
  51  *
  52  * @print: the print format shown to users in the format file.
  53  */
  54
  55 /*
  56  * Function trace entry - function address and parent function address:
  57  */
  58 FTRACE_ENTRY(function, ftrace_entry,
  59
  60         TRACE_FN,
  61
  62         F_STRUCT(
  63                 __field(        unsigned long,  ip              )
  64                 __field(        unsigned long,  parent_ip       )
  65         ),
  66
  67         F_printk(" %lx <-- %lx", __entry->ip, __entry->parent_ip)
  68 );
  69
  70 /* Function call entry */
  71 FTRACE_ENTRY(funcgraph_entry, ftrace_graph_ent_entry,
  72
  73         TRACE_GRAPH_ENT,
  74
  75         F_STRUCT(
  76                 __field_struct( struct ftrace_graph_ent,        graph_ent       )
  77                 __field_desc(   unsigned long,  graph_ent,      func            )
  78                 __field_desc(   int,            graph_ent,      depth           )
  79         ),
  80
  81         F_printk("--> %lx (%d)", __entry->func, __entry->depth)
  82 );
  83
  84 /* Function return entry */
  85 FTRACE_ENTRY(funcgraph_exit, ftrace_graph_ret_entry,
  86
  87         TRACE_GRAPH_RET,
  88
  89         F_STRUCT(
  90                 __field_struct( struct ftrace_graph_ret,        ret     )
  91                 __field_desc(   unsigned long,  ret,            func    )
  92                 __field_desc(   unsigned long long, ret,        calltime)
  93                 __field_desc(   unsigned long long, ret,        rettime )
  94                 __field_desc(   unsigned long,  ret,            overrun )
  95                 __field_desc(   int,            ret,            depth   )
  96         ),
  97
  98         F_printk("<-- %lx (%d) (start: %llx  end: %llx) over: %d",
  99                  __entry->func, __entry->depth,
 100                  __entry->calltime, __entry->rettime,
 101                  __entry->depth)
 102 );
 103
 104 /*
 105  * Context switch trace entry - which task (and prio) we switched from/to:
 106  *
 107  * This is used for both wakeup and context switches. We only want
 108  * to create one structure, but we need two outputs for it.
 109  */
 110 #define FTRACE_CTX_FIELDS                                       \
 111         __field(        unsigned int,   prev_pid        )       \
 112         __field(        unsigned int,   next_pid        )       \
 113         __field(        unsigned int,   next_cpu        )       \
 114         __field(        unsigned char,  prev_prio       )       \
 115         __field(        unsigned char,  prev_state      )       \
 116         __field(        unsigned char,  next_prio       )       \
 117         __field(        unsigned char,  next_state      )
 118
 119 FTRACE_ENTRY(context_switch, ctx_switch_entry,
 120
 121         TRACE_CTX,
 122
 123         F_STRUCT(
 124                 FTRACE_CTX_FIELDS
 125         ),
 126
 127         F_printk("%u:%u:%u  ==> %u:%u:%u [%03u]",
 128                  __entry->prev_pid, __entry->prev_prio, __entry->prev_state,
 129                  __entry->next_pid, __entry->next_prio, __entry->next_state,
 130                  __entry->next_cpu
 131                 )
 132 );
 133
 134 /*
 135  * FTRACE_ENTRY_DUP only creates the format file, it will not
 136  *  create another structure.
 137  */
 138 FTRACE_ENTRY_DUP(wakeup, ctx_switch_entry,
 139
 140         TRACE_WAKE,
 141
 142         F_STRUCT(
 143                 FTRACE_CTX_FIELDS
 144         ),
 145
 146         F_printk("%u:%u:%u  ==+ %u:%u:%u [%03u]",
 147                  __entry->prev_pid, __entry->prev_prio, __entry->prev_state,
 148                  __entry->next_pid, __entry->next_prio, __entry->next_state,
 149                  __entry->next_cpu
 150                 )
 151 );
 152
 153 /*
 154  * Stack-trace entry:
 155  */
 156
 157 #define FTRACE_STACK_ENTRIES    8
 158
 159 #ifndef CONFIG_64BIT
 160 # define IP_FMT "%08lx"
 161 #else
 162 # define IP_FMT "%016lx"
 163 #endif
 164
 165 FTRACE_ENTRY(kernel_stack, stack_entry,
 166
 167         TRACE_STACK,
 168
 169         F_STRUCT(
 170                 __field(        int,            size    )
 171                 __dynamic_array(unsigned long,  caller  )
 172         ),
 173
 174         F_printk("\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n"
 175                  "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n"
 176                  "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n",
 177                  __entry->caller[0], __entry->caller[1], __entry->caller[2],
 178                  __entry->caller[3], __entry->caller[4], __entry->caller[5],
 179                  __entry->caller[6], __entry->caller[7])
 180 );
 181
 182 FTRACE_ENTRY(user_stack, userstack_entry,
 183
 184         TRACE_USER_STACK,
 185
 186         F_STRUCT(
 187                 __field(        unsigned int,   tgid    )
 188                 __array(        unsigned long,  caller, FTRACE_STACK_ENTRIES    )
 189         ),
 190
 191         F_printk("\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n"
 192                  "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n"
 193                  "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n",
 194                  __entry->caller[0], __entry->caller[1], __entry->caller[2],
 195                  __entry->caller[3], __entry->caller[4], __entry->caller[5],
 196                  __entry->caller[6], __entry->caller[7])
 197 );
 198
 199 /*
 200  * trace_printk entry:
 201  */
 202 FTRACE_ENTRY(bprint, bprint_entry,
 203
 204         TRACE_BPRINT,
 205
 206         F_STRUCT(
 207                 __field(        unsigned long,  ip      )
 208                 __field(        const char *,   fmt     )
 209                 __dynamic_array(        u32,    buf     )
 210         ),
 211
 212         F_printk("%08lx fmt:%p",
 213                  __entry->ip, __entry->fmt)
 214 );
 215
 216 FTRACE_ENTRY(print, print_entry,
 217
 218         TRACE_PRINT,
 219
 220         F_STRUCT(
 221                 __field(        unsigned long,  ip      )
 222                 __dynamic_array(        char,   buf     )
 223         ),
 224
 225         F_printk("%08lx %s",
 226                  __entry->ip, __entry->buf)
 227 );
 228
 229 FTRACE_ENTRY(mmiotrace_rw, trace_mmiotrace_rw,
 230
 231         TRACE_MMIO_RW,
 232
 233         F_STRUCT(
 234                 __field_struct( struct mmiotrace_rw,    rw      )
 235                 __field_desc(   resource_size_t, rw,    phys    )
 236                 __field_desc(   unsigned long,  rw,     value   )
 237                 __field_desc(   unsigned long,  rw,     pc      )
 238                 __field_desc(   int,            rw,     map_id  )
 239                 __field_desc(   unsigned char,  rw,     opcode  )
 240                 __field_desc(   unsigned char,  rw,     width   )
 241         ),
 242
 243         F_printk("%lx %lx %lx %d %x %x",
 244                  (unsigned long)__entry->phys, __entry->value, __entry->pc,
 245                  __entry->map_id, __entry->opcode, __entry->width)
 246 );
 247
 248 FTRACE_ENTRY(mmiotrace_map, trace_mmiotrace_map,
 249
 250         TRACE_MMIO_MAP,
 251
 252         F_STRUCT(
 253                 __field_struct( struct mmiotrace_map,   map     )
 254                 __field_desc(   resource_size_t, map,   phys    )
 255                 __field_desc(   unsigned long,  map,    virt    )
 256                 __field_desc(   unsigned long,  map,    len     )
 257                 __field_desc(   int,            map,    map_id  )
 258                 __field_desc(   unsigned char,  map,    opcode  )
 259         ),
 260
 261         F_printk("%lx %lx %lx %d %x",
 262                  (unsigned long)__entry->phys, __entry->virt, __entry->len,
 263                  __entry->map_id, __entry->opcode)
 264 );
 265
 266
 267 #define TRACE_FUNC_SIZE 30
 268 #define TRACE_FILE_SIZE 20
 269
 270 FTRACE_ENTRY(branch, trace_branch,
 271
 272         TRACE_BRANCH,
 273
 274         F_STRUCT(
 275                 __field(        unsigned int,   line                            )
 276                 __array(        char,           func,   TRACE_FUNC_SIZE+1       )
 277                 __array(        char,           file,   TRACE_FILE_SIZE+1       )
 278                 __field(        char,           correct                         )
 279         ),
 280
 281         F_printk("%u:%s:%s (%u)",
 282                  __entry->line,
 283                  __entry->func, __entry->file, __entry->correct)
 284 );
 285