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 FTRACE_ENTRY(kernel_stack, stack_entry, 170 171 TRACE_STACK, 172 173 F_STRUCT( 174 __field( int, size ) 175 __dynamic_array(unsigned long, caller ) 176 ), 177 178 F_printk("\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n" 179 "\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n", 180 __entry->caller[0], __entry->caller[1], __entry->caller[2], 181 __entry->caller[3], __entry->caller[4], __entry->caller[5], 182 __entry->caller[6], __entry->caller[7]), 183 184 FILTER_OTHER 185 ); 186 187 FTRACE_ENTRY(user_stack, userstack_entry, 188 189 TRACE_USER_STACK, 190 191 F_STRUCT( 192 __field( unsigned int, tgid ) 193 __array( unsigned long, caller, FTRACE_STACK_ENTRIES ) 194 ), 195 196 F_printk("\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n" 197 "\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n", 198 __entry->caller[0], __entry->caller[1], __entry->caller[2], 199 __entry->caller[3], __entry->caller[4], __entry->caller[5], 200 __entry->caller[6], __entry->caller[7]), 201 202 FILTER_OTHER 203 ); 204 205 /* 206 * trace_printk entry: 207 */ 208 FTRACE_ENTRY(bprint, bprint_entry, 209 210 TRACE_BPRINT, 211 212 F_STRUCT( 213 __field( unsigned long, ip ) 214 __field( const char *, fmt ) 215 __dynamic_array( u32, buf ) 216 ), 217 218 F_printk("%08lx fmt:%p", 219 __entry->ip, __entry->fmt), 220 221 FILTER_OTHER 222 ); 223 224 FTRACE_ENTRY(print, print_entry, 225 226 TRACE_PRINT, 227 228 F_STRUCT( 229 __field( unsigned long, ip ) 230 __dynamic_array( char, buf ) 231 ), 232 233 F_printk("%08lx %s", 234 __entry->ip, __entry->buf), 235 236 FILTER_OTHER 237 ); 238 239 FTRACE_ENTRY(mmiotrace_rw, trace_mmiotrace_rw, 240 241 TRACE_MMIO_RW, 242 243 F_STRUCT( 244 __field_struct( struct mmiotrace_rw, rw ) 245 __field_desc( resource_size_t, rw, phys ) 246 __field_desc( unsigned long, rw, value ) 247 __field_desc( unsigned long, rw, pc ) 248 __field_desc( int, rw, map_id ) 249 __field_desc( unsigned char, rw, opcode ) 250 __field_desc( unsigned char, rw, width ) 251 ), 252 253 F_printk("%lx %lx %lx %d %x %x", 254 (unsigned long)__entry->phys, __entry->value, __entry->pc, 255 __entry->map_id, __entry->opcode, __entry->width), 256 257 FILTER_OTHER 258 ); 259 260 FTRACE_ENTRY(mmiotrace_map, trace_mmiotrace_map, 261 262 TRACE_MMIO_MAP, 263 264 F_STRUCT( 265 __field_struct( struct mmiotrace_map, map ) 266 __field_desc( resource_size_t, map, phys ) 267 __field_desc( unsigned long, map, virt ) 268 __field_desc( unsigned long, map, len ) 269 __field_desc( int, map, map_id ) 270 __field_desc( unsigned char, map, opcode ) 271 ), 272 273 F_printk("%lx %lx %lx %d %x", 274 (unsigned long)__entry->phys, __entry->virt, __entry->len, 275 __entry->map_id, __entry->opcode), 276 277 FILTER_OTHER 278 ); 279 280 281 #define TRACE_FUNC_SIZE 30 282 #define TRACE_FILE_SIZE 20 283 284 FTRACE_ENTRY(branch, trace_branch, 285 286 TRACE_BRANCH, 287 288 F_STRUCT( 289 __field( unsigned int, line ) 290 __array( char, func, TRACE_FUNC_SIZE+1 ) 291 __array( char, file, TRACE_FILE_SIZE+1 ) 292 __field( char, correct ) 293 ), 294 295 F_printk("%u:%s:%s (%u)", 296 __entry->line, 297 __entry->func, __entry->file, __entry->correct), 298 299 FILTER_OTHER 300 ); 301 302