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TOMOYO Linux Cross Reference
Linux/kernel/trace/trace_entries.h

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  1 // SPDX-License-Identifier: GPL-2.0
  2 /*
  3  * This file defines the trace event structures that go into the ring
  4  * buffer directly. They are created via macros so that changes for them
  5  * appear in the format file. Using macros will automate this process.
  6  *
  7  * The macro used to create a ftrace data structure is:
  8  *
  9  * FTRACE_ENTRY( name, struct_name, id, structure, print )
 10  *
 11  * @name: the name used the event name, as well as the name of
 12  *   the directory that holds the format file.
 13  *
 14  * @struct_name: the name of the structure that is created.
 15  *
 16  * @id: The event identifier that is used to detect what event
 17  *    this is from the ring buffer.
 18  *
 19  * @structure: the structure layout
 20  *
 21  *  - __field(  type,   item    )
 22  *        This is equivalent to declaring
 23  *              type    item;
 24  *        in the structure.
 25  *  - __array(  type,   item,   size    )
 26  *        This is equivalent to declaring
 27  *              type    item[size];
 28  *        in the structure.
 29  *
 30  *   * for structures within structures, the format of the internal
 31  *      structure is laid out. This allows the internal structure
 32  *      to be deciphered for the format file. Although these macros
 33  *      may become out of sync with the internal structure, they
 34  *      will create a compile error if it happens. Since the
 35  *      internel structures are just tracing helpers, this is not
 36  *      an issue.
 37  *
 38  *      When an internal structure is used, it should use:
 39  *
 40  *      __field_struct( type,   item    )
 41  *
 42  *      instead of __field. This will prevent it from being shown in
 43  *      the output file. The fields in the structure should use.
 44  *
 45  *      __field_desc(   type,   container,      item            )
 46  *      __array_desc(   type,   container,      item,   len     )
 47  *
 48  *      type, item and len are the same as __field and __array, but
 49  *      container is added. This is the name of the item in
 50  *      __field_struct that this is describing.
 51  *
 52  *
 53  * @print: the print format shown to users in the format file.
 54  */
 55 
 56 /*
 57  * Function trace entry - function address and parent function address:
 58  */
 59 FTRACE_ENTRY_REG(function, ftrace_entry,
 60 
 61         TRACE_FN,
 62 
 63         F_STRUCT(
 64                 __field_fn(     unsigned long,  ip              )
 65                 __field_fn(     unsigned long,  parent_ip       )
 66         ),
 67 
 68         F_printk(" %ps <-- %ps",
 69                  (void *)__entry->ip, (void *)__entry->parent_ip),
 70 
 71         perf_ftrace_event_register
 72 );
 73 
 74 /* Function call entry */
 75 FTRACE_ENTRY_PACKED(funcgraph_entry, ftrace_graph_ent_entry,
 76 
 77         TRACE_GRAPH_ENT,
 78 
 79         F_STRUCT(
 80                 __field_struct( struct ftrace_graph_ent,        graph_ent       )
 81                 __field_packed( unsigned long,  graph_ent,      func            )
 82                 __field_packed( int,            graph_ent,      depth           )
 83         ),
 84 
 85         F_printk("--> %ps (%d)", (void *)__entry->func, __entry->depth)
 86 );
 87 
 88 /* Function return entry */
 89 FTRACE_ENTRY_PACKED(funcgraph_exit, ftrace_graph_ret_entry,
 90 
 91         TRACE_GRAPH_RET,
 92 
 93         F_STRUCT(
 94                 __field_struct( struct ftrace_graph_ret,        ret     )
 95                 __field_packed( unsigned long,  ret,            func    )
 96                 __field_packed( unsigned long,  ret,            overrun )
 97                 __field_packed( unsigned long long, ret,        calltime)
 98                 __field_packed( unsigned long long, ret,        rettime )
 99                 __field_packed( int,            ret,            depth   )
100         ),
101 
102         F_printk("<-- %ps (%d) (start: %llx  end: %llx) over: %d",
103                  (void *)__entry->func, __entry->depth,
104                  __entry->calltime, __entry->rettime,
105                  __entry->depth)
106 );
107 
108 /*
109  * Context switch trace entry - which task (and prio) we switched from/to:
110  *
111  * This is used for both wakeup and context switches. We only want
112  * to create one structure, but we need two outputs for it.
113  */
114 #define FTRACE_CTX_FIELDS                                       \
115         __field(        unsigned int,   prev_pid        )       \
116         __field(        unsigned int,   next_pid        )       \
117         __field(        unsigned int,   next_cpu        )       \
118         __field(        unsigned char,  prev_prio       )       \
119         __field(        unsigned char,  prev_state      )       \
120         __field(        unsigned char,  next_prio       )       \
121         __field(        unsigned char,  next_state      )
122 
123 FTRACE_ENTRY(context_switch, ctx_switch_entry,
124 
125         TRACE_CTX,
126 
127         F_STRUCT(
128                 FTRACE_CTX_FIELDS
129         ),
130 
131         F_printk("%u:%u:%u  ==> %u:%u:%u [%03u]",
132                  __entry->prev_pid, __entry->prev_prio, __entry->prev_state,
133                  __entry->next_pid, __entry->next_prio, __entry->next_state,
134                  __entry->next_cpu)
135 );
136 
137 /*
138  * FTRACE_ENTRY_DUP only creates the format file, it will not
139  *  create another structure.
140  */
141 FTRACE_ENTRY_DUP(wakeup, ctx_switch_entry,
142 
143         TRACE_WAKE,
144 
145         F_STRUCT(
146                 FTRACE_CTX_FIELDS
147         ),
148 
149         F_printk("%u:%u:%u  ==+ %u:%u:%u [%03u]",
150                  __entry->prev_pid, __entry->prev_prio, __entry->prev_state,
151                  __entry->next_pid, __entry->next_prio, __entry->next_state,
152                  __entry->next_cpu)
153 );
154 
155 /*
156  * Stack-trace entry:
157  */
158 
159 #define FTRACE_STACK_ENTRIES    8
160 
161 FTRACE_ENTRY(kernel_stack, stack_entry,
162 
163         TRACE_STACK,
164 
165         F_STRUCT(
166                 __field(        int,            size    )
167                 __array(        unsigned long,  caller, FTRACE_STACK_ENTRIES    )
168         ),
169 
170         F_printk("\t=> %ps\n\t=> %ps\n\t=> %ps\n"
171                  "\t=> %ps\n\t=> %ps\n\t=> %ps\n"
172                  "\t=> %ps\n\t=> %ps\n",
173                  (void *)__entry->caller[0], (void *)__entry->caller[1],
174                  (void *)__entry->caller[2], (void *)__entry->caller[3],
175                  (void *)__entry->caller[4], (void *)__entry->caller[5],
176                  (void *)__entry->caller[6], (void *)__entry->caller[7])
177 );
178 
179 FTRACE_ENTRY(user_stack, userstack_entry,
180 
181         TRACE_USER_STACK,
182 
183         F_STRUCT(
184                 __field(        unsigned int,   tgid    )
185                 __array(        unsigned long,  caller, FTRACE_STACK_ENTRIES    )
186         ),
187 
188         F_printk("\t=> %ps\n\t=> %ps\n\t=> %ps\n"
189                  "\t=> %ps\n\t=> %ps\n\t=> %ps\n"
190                  "\t=> %ps\n\t=> %ps\n",
191                  (void *)__entry->caller[0], (void *)__entry->caller[1],
192                  (void *)__entry->caller[2], (void *)__entry->caller[3],
193                  (void *)__entry->caller[4], (void *)__entry->caller[5],
194                  (void *)__entry->caller[6], (void *)__entry->caller[7])
195 );
196 
197 /*
198  * trace_printk entry:
199  */
200 FTRACE_ENTRY(bprint, bprint_entry,
201 
202         TRACE_BPRINT,
203 
204         F_STRUCT(
205                 __field(        unsigned long,  ip      )
206                 __field(        const char *,   fmt     )
207                 __dynamic_array(        u32,    buf     )
208         ),
209 
210         F_printk("%ps: %s",
211                  (void *)__entry->ip, __entry->fmt)
212 );
213 
214 FTRACE_ENTRY_REG(print, print_entry,
215 
216         TRACE_PRINT,
217 
218         F_STRUCT(
219                 __field(        unsigned long,  ip      )
220                 __dynamic_array(        char,   buf     )
221         ),
222 
223         F_printk("%ps: %s",
224                  (void *)__entry->ip, __entry->buf),
225 
226         ftrace_event_register
227 );
228 
229 FTRACE_ENTRY(raw_data, raw_data_entry,
230 
231         TRACE_RAW_DATA,
232 
233         F_STRUCT(
234                 __field(        unsigned int,   id      )
235                 __dynamic_array(        char,   buf     )
236         ),
237 
238         F_printk("id:%04x %08x",
239                  __entry->id, (int)__entry->buf[0])
240 );
241 
242 FTRACE_ENTRY(bputs, bputs_entry,
243 
244         TRACE_BPUTS,
245 
246         F_STRUCT(
247                 __field(        unsigned long,  ip      )
248                 __field(        const char *,   str     )
249         ),
250 
251         F_printk("%ps: %s",
252                  (void *)__entry->ip, __entry->str)
253 );
254 
255 FTRACE_ENTRY(mmiotrace_rw, trace_mmiotrace_rw,
256 
257         TRACE_MMIO_RW,
258 
259         F_STRUCT(
260                 __field_struct( struct mmiotrace_rw,    rw      )
261                 __field_desc(   resource_size_t, rw,    phys    )
262                 __field_desc(   unsigned long,  rw,     value   )
263                 __field_desc(   unsigned long,  rw,     pc      )
264                 __field_desc(   int,            rw,     map_id  )
265                 __field_desc(   unsigned char,  rw,     opcode  )
266                 __field_desc(   unsigned char,  rw,     width   )
267         ),
268 
269         F_printk("%lx %lx %lx %d %x %x",
270                  (unsigned long)__entry->phys, __entry->value, __entry->pc,
271                  __entry->map_id, __entry->opcode, __entry->width)
272 );
273 
274 FTRACE_ENTRY(mmiotrace_map, trace_mmiotrace_map,
275 
276         TRACE_MMIO_MAP,
277 
278         F_STRUCT(
279                 __field_struct( struct mmiotrace_map,   map     )
280                 __field_desc(   resource_size_t, map,   phys    )
281                 __field_desc(   unsigned long,  map,    virt    )
282                 __field_desc(   unsigned long,  map,    len     )
283                 __field_desc(   int,            map,    map_id  )
284                 __field_desc(   unsigned char,  map,    opcode  )
285         ),
286 
287         F_printk("%lx %lx %lx %d %x",
288                  (unsigned long)__entry->phys, __entry->virt, __entry->len,
289                  __entry->map_id, __entry->opcode)
290 );
291 
292 
293 #define TRACE_FUNC_SIZE 30
294 #define TRACE_FILE_SIZE 20
295 
296 FTRACE_ENTRY(branch, trace_branch,
297 
298         TRACE_BRANCH,
299 
300         F_STRUCT(
301                 __field(        unsigned int,   line                            )
302                 __array(        char,           func,   TRACE_FUNC_SIZE+1       )
303                 __array(        char,           file,   TRACE_FILE_SIZE+1       )
304                 __field(        char,           correct                         )
305                 __field(        char,           constant                        )
306         ),
307 
308         F_printk("%u:%s:%s (%u)%s",
309                  __entry->line,
310                  __entry->func, __entry->file, __entry->correct,
311                  __entry->constant ? " CONSTANT" : "")
312 );
313 
314 
315 FTRACE_ENTRY(hwlat, hwlat_entry,
316 
317         TRACE_HWLAT,
318 
319         F_STRUCT(
320                 __field(        u64,                    duration        )
321                 __field(        u64,                    outer_duration  )
322                 __field(        u64,                    nmi_total_ts    )
323                 __field_struct( struct timespec64,      timestamp       )
324                 __field_desc(   s64,    timestamp,      tv_sec          )
325                 __field_desc(   long,   timestamp,      tv_nsec         )
326                 __field(        unsigned int,           nmi_count       )
327                 __field(        unsigned int,           seqnum          )
328                 __field(        unsigned int,           count           )
329         ),
330 
331         F_printk("cnt:%u\tts:%010llu.%010lu\tinner:%llu\touter:%llu\tcount:%d\tnmi-ts:%llu\tnmi-count:%u\n",
332                  __entry->seqnum,
333                  __entry->tv_sec,
334                  __entry->tv_nsec,
335                  __entry->duration,
336                  __entry->outer_duration,
337                  __entry->count,
338                  __entry->nmi_total_ts,
339                  __entry->nmi_count)
340 );
341 

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