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_REG(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 FILTER_TRACE_FN, 70 71 perf_ftrace_event_register 72 ); 73 74 /* Function call entry */ 75 FTRACE_ENTRY(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_desc( unsigned long, graph_ent, func ) 82 __field_desc( int, graph_ent, depth ) 83 ), 84 85 F_printk("--> %lx (%d)", __entry->func, __entry->depth), 86 87 FILTER_OTHER 88 ); 89 90 /* Function return entry */ 91 FTRACE_ENTRY(funcgraph_exit, ftrace_graph_ret_entry, 92 93 TRACE_GRAPH_RET, 94 95 F_STRUCT( 96 __field_struct( struct ftrace_graph_ret, ret ) 97 __field_desc( unsigned long, ret, func ) 98 __field_desc( unsigned long long, ret, calltime) 99 __field_desc( unsigned long long, ret, rettime ) 100 __field_desc( unsigned long, ret, overrun ) 101 __field_desc( int, ret, depth ) 102 ), 103 104 F_printk("<-- %lx (%d) (start: %llx end: %llx) over: %d", 105 __entry->func, __entry->depth, 106 __entry->calltime, __entry->rettime, 107 __entry->depth), 108 109 FILTER_OTHER 110 ); 111 112 /* 113 * Context switch trace entry - which task (and prio) we switched from/to: 114 * 115 * This is used for both wakeup and context switches. We only want 116 * to create one structure, but we need two outputs for it. 117 */ 118 #define FTRACE_CTX_FIELDS \ 119 __field( unsigned int, prev_pid ) \ 120 __field( unsigned int, next_pid ) \ 121 __field( unsigned int, next_cpu ) \ 122 __field( unsigned char, prev_prio ) \ 123 __field( unsigned char, prev_state ) \ 124 __field( unsigned char, next_prio ) \ 125 __field( unsigned char, next_state ) 126 127 FTRACE_ENTRY(context_switch, ctx_switch_entry, 128 129 TRACE_CTX, 130 131 F_STRUCT( 132 FTRACE_CTX_FIELDS 133 ), 134 135 F_printk("%u:%u:%u ==> %u:%u:%u [%03u]", 136 __entry->prev_pid, __entry->prev_prio, __entry->prev_state, 137 __entry->next_pid, __entry->next_prio, __entry->next_state, 138 __entry->next_cpu), 139 140 FILTER_OTHER 141 ); 142 143 /* 144 * FTRACE_ENTRY_DUP only creates the format file, it will not 145 * create another structure. 146 */ 147 FTRACE_ENTRY_DUP(wakeup, ctx_switch_entry, 148 149 TRACE_WAKE, 150 151 F_STRUCT( 152 FTRACE_CTX_FIELDS 153 ), 154 155 F_printk("%u:%u:%u ==+ %u:%u:%u [%03u]", 156 __entry->prev_pid, __entry->prev_prio, __entry->prev_state, 157 __entry->next_pid, __entry->next_prio, __entry->next_state, 158 __entry->next_cpu), 159 160 FILTER_OTHER 161 ); 162 163 /* 164 * Stack-trace entry: 165 */ 166 167 #define FTRACE_STACK_ENTRIES 8 168 169 #ifndef CONFIG_64BIT 170 # define IP_FMT "%08lx" 171 #else 172 # define IP_FMT "%016lx" 173 #endif 174 175 FTRACE_ENTRY(kernel_stack, stack_entry, 176 177 TRACE_STACK, 178 179 F_STRUCT( 180 __field( int, size ) 181 __dynamic_array(unsigned long, caller ) 182 ), 183 184 F_printk("\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n" 185 "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n" 186 "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n", 187 __entry->caller[0], __entry->caller[1], __entry->caller[2], 188 __entry->caller[3], __entry->caller[4], __entry->caller[5], 189 __entry->caller[6], __entry->caller[7]), 190 191 FILTER_OTHER 192 ); 193 194 FTRACE_ENTRY(user_stack, userstack_entry, 195 196 TRACE_USER_STACK, 197 198 F_STRUCT( 199 __field( unsigned int, tgid ) 200 __array( unsigned long, caller, FTRACE_STACK_ENTRIES ) 201 ), 202 203 F_printk("\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n" 204 "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n" 205 "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n", 206 __entry->caller[0], __entry->caller[1], __entry->caller[2], 207 __entry->caller[3], __entry->caller[4], __entry->caller[5], 208 __entry->caller[6], __entry->caller[7]), 209 210 FILTER_OTHER 211 ); 212 213 /* 214 * trace_printk entry: 215 */ 216 FTRACE_ENTRY(bprint, bprint_entry, 217 218 TRACE_BPRINT, 219 220 F_STRUCT( 221 __field( unsigned long, ip ) 222 __field( const char *, fmt ) 223 __dynamic_array( u32, buf ) 224 ), 225 226 F_printk("%pf: %s", 227 (void *)__entry->ip, __entry->fmt), 228 229 FILTER_OTHER 230 ); 231 232 FTRACE_ENTRY(print, print_entry, 233 234 TRACE_PRINT, 235 236 F_STRUCT( 237 __field( unsigned long, ip ) 238 __dynamic_array( char, buf ) 239 ), 240 241 F_printk("%pf: %s", 242 (void *)__entry->ip, __entry->buf), 243 244 FILTER_OTHER 245 ); 246 247 FTRACE_ENTRY(bputs, bputs_entry, 248 249 TRACE_BPUTS, 250 251 F_STRUCT( 252 __field( unsigned long, ip ) 253 __field( const char *, str ) 254 ), 255 256 F_printk("%pf: %s", 257 (void *)__entry->ip, __entry->str), 258 259 FILTER_OTHER 260 ); 261 262 FTRACE_ENTRY(mmiotrace_rw, trace_mmiotrace_rw, 263 264 TRACE_MMIO_RW, 265 266 F_STRUCT( 267 __field_struct( struct mmiotrace_rw, rw ) 268 __field_desc( resource_size_t, rw, phys ) 269 __field_desc( unsigned long, rw, value ) 270 __field_desc( unsigned long, rw, pc ) 271 __field_desc( int, rw, map_id ) 272 __field_desc( unsigned char, rw, opcode ) 273 __field_desc( unsigned char, rw, width ) 274 ), 275 276 F_printk("%lx %lx %lx %d %x %x", 277 (unsigned long)__entry->phys, __entry->value, __entry->pc, 278 __entry->map_id, __entry->opcode, __entry->width), 279 280 FILTER_OTHER 281 ); 282 283 FTRACE_ENTRY(mmiotrace_map, trace_mmiotrace_map, 284 285 TRACE_MMIO_MAP, 286 287 F_STRUCT( 288 __field_struct( struct mmiotrace_map, map ) 289 __field_desc( resource_size_t, map, phys ) 290 __field_desc( unsigned long, map, virt ) 291 __field_desc( unsigned long, map, len ) 292 __field_desc( int, map, map_id ) 293 __field_desc( unsigned char, map, opcode ) 294 ), 295 296 F_printk("%lx %lx %lx %d %x", 297 (unsigned long)__entry->phys, __entry->virt, __entry->len, 298 __entry->map_id, __entry->opcode), 299 300 FILTER_OTHER 301 ); 302 303 304 #define TRACE_FUNC_SIZE 30 305 #define TRACE_FILE_SIZE 20 306 307 FTRACE_ENTRY(branch, trace_branch, 308 309 TRACE_BRANCH, 310 311 F_STRUCT( 312 __field( unsigned int, line ) 313 __array( char, func, TRACE_FUNC_SIZE+1 ) 314 __array( char, file, TRACE_FILE_SIZE+1 ) 315 __field( char, correct ) 316 ), 317 318 F_printk("%u:%s:%s (%u)", 319 __entry->line, 320 __entry->func, __entry->file, __entry->correct), 321 322 FILTER_OTHER 323 ); 324 325