1 /* 2 * Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com> 3 * 4 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; version 2 of the License (not later!) 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 * 19 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 20 */ 21 #include <stdio.h> 22 #include <stdlib.h> 23 #include <string.h> 24 #include <ctype.h> 25 #include <errno.h> 26 27 #include "../perf.h" 28 #include "util.h" 29 #include "trace-event.h" 30 31 int header_page_size_size; 32 int header_page_ts_size; 33 int header_page_data_offset; 34 35 bool latency_format; 36 37 struct pevent *read_trace_init(int file_bigendian, int host_bigendian) 38 { 39 struct pevent *pevent = pevent_alloc(); 40 41 if (pevent != NULL) { 42 pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT); 43 pevent_set_file_bigendian(pevent, file_bigendian); 44 pevent_set_host_bigendian(pevent, host_bigendian); 45 } 46 47 return pevent; 48 } 49 50 static int get_common_field(struct scripting_context *context, 51 int *offset, int *size, const char *type) 52 { 53 struct pevent *pevent = context->pevent; 54 struct event_format *event; 55 struct format_field *field; 56 57 if (!*size) { 58 if (!pevent->events) 59 return 0; 60 61 event = pevent->events[0]; 62 field = pevent_find_common_field(event, type); 63 if (!field) 64 return 0; 65 *offset = field->offset; 66 *size = field->size; 67 } 68 69 return pevent_read_number(pevent, context->event_data + *offset, *size); 70 } 71 72 int common_lock_depth(struct scripting_context *context) 73 { 74 static int offset; 75 static int size; 76 int ret; 77 78 ret = get_common_field(context, &size, &offset, 79 "common_lock_depth"); 80 if (ret < 0) 81 return -1; 82 83 return ret; 84 } 85 86 int common_flags(struct scripting_context *context) 87 { 88 static int offset; 89 static int size; 90 int ret; 91 92 ret = get_common_field(context, &size, &offset, 93 "common_flags"); 94 if (ret < 0) 95 return -1; 96 97 return ret; 98 } 99 100 int common_pc(struct scripting_context *context) 101 { 102 static int offset; 103 static int size; 104 int ret; 105 106 ret = get_common_field(context, &size, &offset, 107 "common_preempt_count"); 108 if (ret < 0) 109 return -1; 110 111 return ret; 112 } 113 114 unsigned long long 115 raw_field_value(struct event_format *event, const char *name, void *data) 116 { 117 struct format_field *field; 118 unsigned long long val; 119 120 field = pevent_find_any_field(event, name); 121 if (!field) 122 return 0ULL; 123 124 pevent_read_number_field(field, data, &val); 125 126 return val; 127 } 128 129 void *raw_field_ptr(struct event_format *event, const char *name, void *data) 130 { 131 struct format_field *field; 132 133 field = pevent_find_any_field(event, name); 134 if (!field) 135 return NULL; 136 137 if (field->flags & FIELD_IS_DYNAMIC) { 138 int offset; 139 140 offset = *(int *)(data + field->offset); 141 offset &= 0xffff; 142 143 return data + offset; 144 } 145 146 return data + field->offset; 147 } 148 149 int trace_parse_common_type(struct pevent *pevent, void *data) 150 { 151 struct pevent_record record; 152 153 record.data = data; 154 return pevent_data_type(pevent, &record); 155 } 156 157 int trace_parse_common_pid(struct pevent *pevent, void *data) 158 { 159 struct pevent_record record; 160 161 record.data = data; 162 return pevent_data_pid(pevent, &record); 163 } 164 165 unsigned long long read_size(struct pevent *pevent, void *ptr, int size) 166 { 167 return pevent_read_number(pevent, ptr, size); 168 } 169 170 void event_format__print(struct event_format *event, 171 int cpu, void *data, int size) 172 { 173 struct pevent_record record; 174 struct trace_seq s; 175 176 memset(&record, 0, sizeof(record)); 177 record.cpu = cpu; 178 record.size = size; 179 record.data = data; 180 181 trace_seq_init(&s); 182 pevent_event_info(&s, event, &record); 183 trace_seq_do_printf(&s); 184 } 185 186 void print_trace_event(struct pevent *pevent, int cpu, void *data, int size) 187 { 188 int type = trace_parse_common_type(pevent, data); 189 struct event_format *event = pevent_find_event(pevent, type); 190 191 if (!event) { 192 warning("ug! no event found for type %d", type); 193 return; 194 } 195 196 event_format__print(event, cpu, data, size); 197 } 198 199 void print_event(struct pevent *pevent, int cpu, void *data, int size, 200 unsigned long long nsecs, char *comm) 201 { 202 struct pevent_record record; 203 struct trace_seq s; 204 int pid; 205 206 pevent->latency_format = latency_format; 207 208 record.ts = nsecs; 209 record.cpu = cpu; 210 record.size = size; 211 record.data = data; 212 pid = pevent_data_pid(pevent, &record); 213 214 if (!pevent_pid_is_registered(pevent, pid)) 215 pevent_register_comm(pevent, comm, pid); 216 217 trace_seq_init(&s); 218 pevent_print_event(pevent, &s, &record); 219 trace_seq_do_printf(&s); 220 printf("\n"); 221 } 222 223 void parse_proc_kallsyms(struct pevent *pevent, 224 char *file, unsigned int size __unused) 225 { 226 unsigned long long addr; 227 char *func; 228 char *line; 229 char *next = NULL; 230 char *addr_str; 231 char *mod; 232 char ch; 233 234 line = strtok_r(file, "\n", &next); 235 while (line) { 236 mod = NULL; 237 sscanf(line, "%as %c %as\t[%as", 238 (float *)(void *)&addr_str, /* workaround gcc warning */ 239 &ch, (float *)(void *)&func, (float *)(void *)&mod); 240 addr = strtoull(addr_str, NULL, 16); 241 free(addr_str); 242 243 /* truncate the extra ']' */ 244 if (mod) 245 mod[strlen(mod) - 1] = 0; 246 247 pevent_register_function(pevent, func, addr, mod); 248 free(func); 249 free(mod); 250 251 line = strtok_r(NULL, "\n", &next); 252 } 253 } 254 255 void parse_ftrace_printk(struct pevent *pevent, 256 char *file, unsigned int size __unused) 257 { 258 unsigned long long addr; 259 char *printk; 260 char *line; 261 char *next = NULL; 262 char *addr_str; 263 char *fmt; 264 265 line = strtok_r(file, "\n", &next); 266 while (line) { 267 addr_str = strtok_r(line, ":", &fmt); 268 if (!addr_str) { 269 warning("printk format with empty entry"); 270 break; 271 } 272 addr = strtoull(addr_str, NULL, 16); 273 /* fmt still has a space, skip it */ 274 printk = strdup(fmt+1); 275 line = strtok_r(NULL, "\n", &next); 276 pevent_register_print_string(pevent, printk, addr); 277 } 278 } 279 280 int parse_ftrace_file(struct pevent *pevent, char *buf, unsigned long size) 281 { 282 return pevent_parse_event(pevent, buf, size, "ftrace"); 283 } 284 285 int parse_event_file(struct pevent *pevent, 286 char *buf, unsigned long size, char *sys) 287 { 288 return pevent_parse_event(pevent, buf, size, sys); 289 } 290 291 struct event_format *trace_find_next_event(struct pevent *pevent, 292 struct event_format *event) 293 { 294 static int idx; 295 296 if (!pevent->events) 297 return NULL; 298 299 if (!event) { 300 idx = 0; 301 return pevent->events[0]; 302 } 303 304 if (idx < pevent->nr_events && event == pevent->events[idx]) { 305 idx++; 306 if (idx == pevent->nr_events) 307 return NULL; 308 return pevent->events[idx]; 309 } 310 311 for (idx = 1; idx < pevent->nr_events; idx++) { 312 if (event == pevent->events[idx - 1]) 313 return pevent->events[idx]; 314 } 315 return NULL; 316 } 317 318 struct flag { 319 const char *name; 320 unsigned long long value; 321 }; 322 323 static const struct flag flags[] = { 324 { "HI_SOFTIRQ", 0 }, 325 { "TIMER_SOFTIRQ", 1 }, 326 { "NET_TX_SOFTIRQ", 2 }, 327 { "NET_RX_SOFTIRQ", 3 }, 328 { "BLOCK_SOFTIRQ", 4 }, 329 { "BLOCK_IOPOLL_SOFTIRQ", 5 }, 330 { "TASKLET_SOFTIRQ", 6 }, 331 { "SCHED_SOFTIRQ", 7 }, 332 { "HRTIMER_SOFTIRQ", 8 }, 333 { "RCU_SOFTIRQ", 9 }, 334 335 { "HRTIMER_NORESTART", 0 }, 336 { "HRTIMER_RESTART", 1 }, 337 }; 338 339 unsigned long long eval_flag(const char *flag) 340 { 341 int i; 342 343 /* 344 * Some flags in the format files do not get converted. 345 * If the flag is not numeric, see if it is something that 346 * we already know about. 347 */ 348 if (isdigit(flag[0])) 349 return strtoull(flag, NULL, 0); 350 351 for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++) 352 if (strcmp(flags[i].name, flag) == 0) 353 return flags[i].value; 354 355 return 0; 356 } 357