tools/perf/util/trace-event-parse.c

   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 }