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 print_trace_event(struct pevent *pevent, int cpu, void *data, int size) 171 { 172 struct event_format *event; 173 struct pevent_record record; 174 struct trace_seq s; 175 int type; 176 177 type = trace_parse_common_type(pevent, data); 178 179 event = pevent_find_event(pevent, type); 180 if (!event) { 181 warning("ug! no event found for type %d", type); 182 return; 183 } 184 185 memset(&record, 0, sizeof(record)); 186 record.cpu = cpu; 187 record.size = size; 188 record.data = data; 189 190 trace_seq_init(&s); 191 pevent_event_info(&s, event, &record); 192 trace_seq_do_printf(&s); 193 } 194 195 void print_event(struct pevent *pevent, int cpu, void *data, int size, 196 unsigned long long nsecs, char *comm) 197 { 198 struct pevent_record record; 199 struct trace_seq s; 200 int pid; 201 202 pevent->latency_format = latency_format; 203 204 record.ts = nsecs; 205 record.cpu = cpu; 206 record.size = size; 207 record.data = data; 208 pid = pevent_data_pid(pevent, &record); 209 210 if (!pevent_pid_is_registered(pevent, pid)) 211 pevent_register_comm(pevent, comm, pid); 212 213 trace_seq_init(&s); 214 pevent_print_event(pevent, &s, &record); 215 trace_seq_do_printf(&s); 216 printf("\n"); 217 } 218 219 void parse_proc_kallsyms(struct pevent *pevent, 220 char *file, unsigned int size __unused) 221 { 222 unsigned long long addr; 223 char *func; 224 char *line; 225 char *next = NULL; 226 char *addr_str; 227 char *mod; 228 char ch; 229 230 line = strtok_r(file, "\n", &next); 231 while (line) { 232 mod = NULL; 233 sscanf(line, "%as %c %as\t[%as", 234 (float *)(void *)&addr_str, /* workaround gcc warning */ 235 &ch, (float *)(void *)&func, (float *)(void *)&mod); 236 addr = strtoull(addr_str, NULL, 16); 237 free(addr_str); 238 239 /* truncate the extra ']' */ 240 if (mod) 241 mod[strlen(mod) - 1] = 0; 242 243 pevent_register_function(pevent, func, addr, mod); 244 free(func); 245 free(mod); 246 247 line = strtok_r(NULL, "\n", &next); 248 } 249 } 250 251 void parse_ftrace_printk(struct pevent *pevent, 252 char *file, unsigned int size __unused) 253 { 254 unsigned long long addr; 255 char *printk; 256 char *line; 257 char *next = NULL; 258 char *addr_str; 259 char *fmt; 260 261 line = strtok_r(file, "\n", &next); 262 while (line) { 263 addr_str = strtok_r(line, ":", &fmt); 264 if (!addr_str) { 265 warning("printk format with empty entry"); 266 break; 267 } 268 addr = strtoull(addr_str, NULL, 16); 269 /* fmt still has a space, skip it */ 270 printk = strdup(fmt+1); 271 line = strtok_r(NULL, "\n", &next); 272 pevent_register_print_string(pevent, printk, addr); 273 } 274 } 275 276 int parse_ftrace_file(struct pevent *pevent, char *buf, unsigned long size) 277 { 278 return pevent_parse_event(pevent, buf, size, "ftrace"); 279 } 280 281 int parse_event_file(struct pevent *pevent, 282 char *buf, unsigned long size, char *sys) 283 { 284 return pevent_parse_event(pevent, buf, size, sys); 285 } 286 287 struct event_format *trace_find_next_event(struct pevent *pevent, 288 struct event_format *event) 289 { 290 static int idx; 291 292 if (!pevent->events) 293 return NULL; 294 295 if (!event) { 296 idx = 0; 297 return pevent->events[0]; 298 } 299 300 if (idx < pevent->nr_events && event == pevent->events[idx]) { 301 idx++; 302 if (idx == pevent->nr_events) 303 return NULL; 304 return pevent->events[idx]; 305 } 306 307 for (idx = 1; idx < pevent->nr_events; idx++) { 308 if (event == pevent->events[idx - 1]) 309 return pevent->events[idx]; 310 } 311 return NULL; 312 } 313 314 struct flag { 315 const char *name; 316 unsigned long long value; 317 }; 318 319 static const struct flag flags[] = { 320 { "HI_SOFTIRQ", 0 }, 321 { "TIMER_SOFTIRQ", 1 }, 322 { "NET_TX_SOFTIRQ", 2 }, 323 { "NET_RX_SOFTIRQ", 3 }, 324 { "BLOCK_SOFTIRQ", 4 }, 325 { "BLOCK_IOPOLL_SOFTIRQ", 5 }, 326 { "TASKLET_SOFTIRQ", 6 }, 327 { "SCHED_SOFTIRQ", 7 }, 328 { "HRTIMER_SOFTIRQ", 8 }, 329 { "RCU_SOFTIRQ", 9 }, 330 331 { "HRTIMER_NORESTART", 0 }, 332 { "HRTIMER_RESTART", 1 }, 333 }; 334 335 unsigned long long eval_flag(const char *flag) 336 { 337 int i; 338 339 /* 340 * Some flags in the format files do not get converted. 341 * If the flag is not numeric, see if it is something that 342 * we already know about. 343 */ 344 if (isdigit(flag[0])) 345 return strtoull(flag, NULL, 0); 346 347 for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++) 348 if (strcmp(flags[i].name, flag) == 0) 349 return flags[i].value; 350 351 return 0; 352 } 353