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 FTRACE_ENTRY(kernel_stack, stack_entry, 160 161 TRACE_STACK, 162 163 F_STRUCT( 164 __field( int, size ) 165 __dynamic_array(unsigned long, caller ) 166 ), 167 168 F_printk("\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n" 169 "\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n", 170 __entry->caller[0], __entry->caller[1], __entry->caller[2], 171 __entry->caller[3], __entry->caller[4], __entry->caller[5], 172 __entry->caller[6], __entry->caller[7]) 173 ); 174 175 FTRACE_ENTRY(user_stack, userstack_entry, 176 177 TRACE_USER_STACK, 178 179 F_STRUCT( 180 __field( unsigned int, tgid ) 181 __array( unsigned long, caller, FTRACE_STACK_ENTRIES ) 182 ), 183 184 F_printk("\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n" 185 "\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n", 186 __entry->caller[0], __entry->caller[1], __entry->caller[2], 187 __entry->caller[3], __entry->caller[4], __entry->caller[5], 188 __entry->caller[6], __entry->caller[7]) 189 ); 190 191 /* 192 * trace_printk entry: 193 */ 194 FTRACE_ENTRY(bprint, bprint_entry, 195 196 TRACE_BPRINT, 197 198 F_STRUCT( 199 __field( unsigned long, ip ) 200 __field( const char *, fmt ) 201 __dynamic_array( u32, buf ) 202 ), 203 204 F_printk("%08lx fmt:%p", 205 __entry->ip, __entry->fmt) 206 ); 207 208 FTRACE_ENTRY(print, print_entry, 209 210 TRACE_PRINT, 211 212 F_STRUCT( 213 __field( unsigned long, ip ) 214 __dynamic_array( char, buf ) 215 ), 216 217 F_printk("%08lx %s", 218 __entry->ip, __entry->buf) 219 ); 220 221 FTRACE_ENTRY(mmiotrace_rw, trace_mmiotrace_rw, 222 223 TRACE_MMIO_RW, 224 225 F_STRUCT( 226 __field_struct( struct mmiotrace_rw, rw ) 227 __field_desc( resource_size_t, rw, phys ) 228 __field_desc( unsigned long, rw, value ) 229 __field_desc( unsigned long, rw, pc ) 230 __field_desc( int, rw, map_id ) 231 __field_desc( unsigned char, rw, opcode ) 232 __field_desc( unsigned char, rw, width ) 233 ), 234 235 F_printk("%lx %lx %lx %d %x %x", 236 (unsigned long)__entry->phys, __entry->value, __entry->pc, 237 __entry->map_id, __entry->opcode, __entry->width) 238 ); 239 240 FTRACE_ENTRY(mmiotrace_map, trace_mmiotrace_map, 241 242 TRACE_MMIO_MAP, 243 244 F_STRUCT( 245 __field_struct( struct mmiotrace_map, map ) 246 __field_desc( resource_size_t, map, phys ) 247 __field_desc( unsigned long, map, virt ) 248 __field_desc( unsigned long, map, len ) 249 __field_desc( int, map, map_id ) 250 __field_desc( unsigned char, map, opcode ) 251 ), 252 253 F_printk("%lx %lx %lx %d %x", 254 (unsigned long)__entry->phys, __entry->virt, __entry->len, 255 __entry->map_id, __entry->opcode) 256 ); 257 258 259 #define TRACE_FUNC_SIZE 30 260 #define TRACE_FILE_SIZE 20 261 262 FTRACE_ENTRY(branch, trace_branch, 263 264 TRACE_BRANCH, 265 266 F_STRUCT( 267 __field( unsigned int, line ) 268 __array( char, func, TRACE_FUNC_SIZE+1 ) 269 __array( char, file, TRACE_FILE_SIZE+1 ) 270 __field( char, correct ) 271 ), 272 273 F_printk("%u:%s:%s (%u)", 274 __entry->line, 275 __entry->func, __entry->file, __entry->correct) 276 ); 277 278