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 struct pevent *perf_pevent; 36 static struct pevent *pevent; 37 38 bool latency_format; 39 40 int read_trace_init(int file_bigendian, int host_bigendian) 41 { 42 if (pevent) 43 return 0; 44 45 perf_pevent = pevent_alloc(); 46 pevent = perf_pevent; 47 48 pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT); 49 pevent_set_file_bigendian(pevent, file_bigendian); 50 pevent_set_host_bigendian(pevent, host_bigendian); 51 52 return 0; 53 } 54 55 static int get_common_field(struct scripting_context *context, 56 int *offset, int *size, const char *type) 57 { 58 struct event_format *event; 59 struct format_field *field; 60 61 if (!*size) { 62 if (!pevent->events) 63 return 0; 64 65 event = pevent->events[0]; 66 field = pevent_find_common_field(event, type); 67 if (!field) 68 return 0; 69 *offset = field->offset; 70 *size = field->size; 71 } 72 73 return pevent_read_number(pevent, context->event_data + *offset, *size); 74 } 75 76 int common_lock_depth(struct scripting_context *context) 77 { 78 static int offset; 79 static int size; 80 int ret; 81 82 ret = get_common_field(context, &size, &offset, 83 "common_lock_depth"); 84 if (ret < 0) 85 return -1; 86 87 return ret; 88 } 89 90 int common_flags(struct scripting_context *context) 91 { 92 static int offset; 93 static int size; 94 int ret; 95 96 ret = get_common_field(context, &size, &offset, 97 "common_flags"); 98 if (ret < 0) 99 return -1; 100 101 return ret; 102 } 103 104 int common_pc(struct scripting_context *context) 105 { 106 static int offset; 107 static int size; 108 int ret; 109 110 ret = get_common_field(context, &size, &offset, 111 "common_preempt_count"); 112 if (ret < 0) 113 return -1; 114 115 return ret; 116 } 117 118 unsigned long long 119 raw_field_value(struct event_format *event, const char *name, void *data) 120 { 121 struct format_field *field; 122 unsigned long long val; 123 124 field = pevent_find_any_field(event, name); 125 if (!field) 126 return 0ULL; 127 128 pevent_read_number_field(field, data, &val); 129 130 return val; 131 } 132 133 void *raw_field_ptr(struct event_format *event, const char *name, void *data) 134 { 135 struct format_field *field; 136 137 field = pevent_find_any_field(event, name); 138 if (!field) 139 return NULL; 140 141 if (field->flags & FIELD_IS_DYNAMIC) { 142 int offset; 143 144 offset = *(int *)(data + field->offset); 145 offset &= 0xffff; 146 147 return data + offset; 148 } 149 150 return data + field->offset; 151 } 152 153 int trace_parse_common_type(void *data) 154 { 155 struct pevent_record record; 156 157 record.data = data; 158 return pevent_data_type(pevent, &record); 159 } 160 161 int trace_parse_common_pid(void *data) 162 { 163 struct pevent_record record; 164 165 record.data = data; 166 return pevent_data_pid(pevent, &record); 167 } 168 169 unsigned long long read_size(void *ptr, int size) 170 { 171 return pevent_read_number(pevent, ptr, size); 172 } 173 174 struct event_format *trace_find_event(int type) 175 { 176 return pevent_find_event(pevent, type); 177 } 178 179 180 void print_trace_event(int cpu, void *data, int size) 181 { 182 struct event_format *event; 183 struct pevent_record record; 184 struct trace_seq s; 185 int type; 186 187 type = trace_parse_common_type(data); 188 189 event = trace_find_event(type); 190 if (!event) { 191 warning("ug! no event found for type %d", type); 192 return; 193 } 194 195 memset(&record, 0, sizeof(record)); 196 record.cpu = cpu; 197 record.size = size; 198 record.data = data; 199 200 trace_seq_init(&s); 201 pevent_event_info(&s, event, &record); 202 trace_seq_do_printf(&s); 203 } 204 205 void print_event(int cpu, void *data, int size, unsigned long long nsecs, 206 char *comm) 207 { 208 struct pevent_record record; 209 struct trace_seq s; 210 int pid; 211 212 pevent->latency_format = latency_format; 213 214 record.ts = nsecs; 215 record.cpu = cpu; 216 record.size = size; 217 record.data = data; 218 pid = pevent_data_pid(pevent, &record); 219 220 if (!pevent_pid_is_registered(pevent, pid)) 221 pevent_register_comm(pevent, comm, pid); 222 223 trace_seq_init(&s); 224 pevent_print_event(pevent, &s, &record); 225 trace_seq_do_printf(&s); 226 printf("\n"); 227 } 228 229 void parse_proc_kallsyms(char *file, unsigned int size __unused) 230 { 231 unsigned long long addr; 232 char *func; 233 char *line; 234 char *next = NULL; 235 char *addr_str; 236 char *mod; 237 char ch; 238 239 line = strtok_r(file, "\n", &next); 240 while (line) { 241 mod = NULL; 242 sscanf(line, "%as %c %as\t[%as", 243 (float *)(void *)&addr_str, /* workaround gcc warning */ 244 &ch, (float *)(void *)&func, (float *)(void *)&mod); 245 addr = strtoull(addr_str, NULL, 16); 246 free(addr_str); 247 248 /* truncate the extra ']' */ 249 if (mod) 250 mod[strlen(mod) - 1] = 0; 251 252 pevent_register_function(pevent, func, addr, mod); 253 free(func); 254 free(mod); 255 256 line = strtok_r(NULL, "\n", &next); 257 } 258 } 259 260 void parse_ftrace_printk(char *file, unsigned int size __unused) 261 { 262 unsigned long long addr; 263 char *printk; 264 char *line; 265 char *next = NULL; 266 char *addr_str; 267 char *fmt; 268 269 line = strtok_r(file, "\n", &next); 270 while (line) { 271 addr_str = strtok_r(line, ":", &fmt); 272 if (!addr_str) { 273 warning("printk format with empty entry"); 274 break; 275 } 276 addr = strtoull(addr_str, NULL, 16); 277 /* fmt still has a space, skip it */ 278 printk = strdup(fmt+1); 279 line = strtok_r(NULL, "\n", &next); 280 pevent_register_print_string(pevent, printk, addr); 281 } 282 } 283 284 int parse_ftrace_file(char *buf, unsigned long size) 285 { 286 return pevent_parse_event(pevent, buf, size, "ftrace"); 287 } 288 289 int parse_event_file(char *buf, unsigned long size, char *sys) 290 { 291 return pevent_parse_event(pevent, buf, size, sys); 292 } 293 294 struct event_format *trace_find_next_event(struct event_format *event) 295 { 296 static int idx; 297 298 if (!pevent->events) 299 return NULL; 300 301 if (!event) { 302 idx = 0; 303 return pevent->events[0]; 304 } 305 306 if (idx < pevent->nr_events && event == pevent->events[idx]) { 307 idx++; 308 if (idx == pevent->nr_events) 309 return NULL; 310 return pevent->events[idx]; 311 } 312 313 for (idx = 1; idx < pevent->nr_events; idx++) { 314 if (event == pevent->events[idx - 1]) 315 return pevent->events[idx]; 316 } 317 return NULL; 318 } 319 320 struct flag { 321 const char *name; 322 unsigned long long value; 323 }; 324 325 static const struct flag flags[] = { 326 { "HI_SOFTIRQ", 0 }, 327 { "TIMER_SOFTIRQ", 1 }, 328 { "NET_TX_SOFTIRQ", 2 }, 329 { "NET_RX_SOFTIRQ", 3 }, 330 { "BLOCK_SOFTIRQ", 4 }, 331 { "BLOCK_IOPOLL_SOFTIRQ", 5 }, 332 { "TASKLET_SOFTIRQ", 6 }, 333 { "SCHED_SOFTIRQ", 7 }, 334 { "HRTIMER_SOFTIRQ", 8 }, 335 { "RCU_SOFTIRQ", 9 }, 336 337 { "HRTIMER_NORESTART", 0 }, 338 { "HRTIMER_RESTART", 1 }, 339 }; 340 341 unsigned long long eval_flag(const char *flag) 342 { 343 int i; 344 345 /* 346 * Some flags in the format files do not get converted. 347 * If the flag is not numeric, see if it is something that 348 * we already know about. 349 */ 350 if (isdigit(flag[0])) 351 return strtoull(flag, NULL, 0); 352 353 for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++) 354 if (strcmp(flags[i].name, flag) == 0) 355 return flags[i].value; 356 357 return 0; 358 } 359