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 struct pevent *read_trace_init(int file_bigendian, int host_bigendian)
  32 {
  33         struct pevent *pevent = pevent_alloc();
  34
  35         if (pevent != NULL) {
  36                 pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT);
  37                 pevent_set_file_bigendian(pevent, file_bigendian);
  38                 pevent_set_host_bigendian(pevent, host_bigendian);
  39         }
  40
  41         return pevent;
  42 }
  43
  44 static int get_common_field(struct scripting_context *context,
  45                             int *offset, int *size, const char *type)
  46 {
  47         struct pevent *pevent = context->pevent;
  48         struct event_format *event;
  49         struct format_field *field;
  50
  51         if (!*size) {
  52                 if (!pevent->events)
  53                         return 0;
  54
  55                 event = pevent->events[0];
  56                 field = pevent_find_common_field(event, type);
  57                 if (!field)
  58                         return 0;
  59                 *offset = field->offset;
  60                 *size = field->size;
  61         }
  62
  63         return pevent_read_number(pevent, context->event_data + *offset, *size);
  64 }
  65
  66 int common_lock_depth(struct scripting_context *context)
  67 {
  68         static int offset;
  69         static int size;
  70         int ret;
  71
  72         ret = get_common_field(context, &size, &offset,
  73                                "common_lock_depth");
  74         if (ret < 0)
  75                 return -1;
  76
  77         return ret;
  78 }
  79
  80 int common_flags(struct scripting_context *context)
  81 {
  82         static int offset;
  83         static int size;
  84         int ret;
  85
  86         ret = get_common_field(context, &size, &offset,
  87                                "common_flags");
  88         if (ret < 0)
  89                 return -1;
  90
  91         return ret;
  92 }
  93
  94 int common_pc(struct scripting_context *context)
  95 {
  96         static int offset;
  97         static int size;
  98         int ret;
  99
 100         ret = get_common_field(context, &size, &offset,
 101                                "common_preempt_count");
 102         if (ret < 0)
 103                 return -1;
 104
 105         return ret;
 106 }
 107
 108 unsigned long long
 109 raw_field_value(struct event_format *event, const char *name, void *data)
 110 {
 111         struct format_field *field;
 112         unsigned long long val;
 113
 114         field = pevent_find_any_field(event, name);
 115         if (!field)
 116                 return 0ULL;
 117
 118         pevent_read_number_field(field, data, &val);
 119
 120         return val;
 121 }
 122
 123 void *raw_field_ptr(struct event_format *event, const char *name, void *data)
 124 {
 125         struct format_field *field;
 126
 127         field = pevent_find_any_field(event, name);
 128         if (!field)
 129                 return NULL;
 130
 131         if (field->flags & FIELD_IS_DYNAMIC) {
 132                 int offset;
 133
 134                 offset = *(int *)(data + field->offset);
 135                 offset &= 0xffff;
 136
 137                 return data + offset;
 138         }
 139
 140         return data + field->offset;
 141 }
 142
 143 int trace_parse_common_type(struct pevent *pevent, void *data)
 144 {
 145         struct pevent_record record;
 146
 147         record.data = data;
 148         return pevent_data_type(pevent, &record);
 149 }
 150
 151 int trace_parse_common_pid(struct pevent *pevent, void *data)
 152 {
 153         struct pevent_record record;
 154
 155         record.data = data;
 156         return pevent_data_pid(pevent, &record);
 157 }
 158
 159 unsigned long long read_size(struct event_format *event, void *ptr, int size)
 160 {
 161         return pevent_read_number(event->pevent, ptr, size);
 162 }
 163
 164 void event_format__print(struct event_format *event,
 165                          int cpu, void *data, int size)
 166 {
 167         struct pevent_record record;
 168         struct trace_seq s;
 169
 170         memset(&record, 0, sizeof(record));
 171         record.cpu = cpu;
 172         record.size = size;
 173         record.data = data;
 174
 175         trace_seq_init(&s);
 176         pevent_event_info(&s, event, &record);
 177         trace_seq_do_printf(&s);
 178 }
 179
 180 void parse_proc_kallsyms(struct pevent *pevent,
 181                          char *file, unsigned int size __maybe_unused)
 182 {
 183         unsigned long long addr;
 184         char *func;
 185         char *line;
 186         char *next = NULL;
 187         char *addr_str;
 188         char *mod;
 189         char *fmt;
 190
 191         line = strtok_r(file, "\n", &next);
 192         while (line) {
 193                 mod = NULL;
 194                 addr_str = strtok_r(line, " ", &fmt);
 195                 addr = strtoull(addr_str, NULL, 16);
 196                 /* skip character */
 197                 strtok_r(NULL, " ", &fmt);
 198                 func = strtok_r(NULL, "\t", &fmt);
 199                 mod = strtok_r(NULL, "]", &fmt);
 200                 /* truncate the extra '[' */
 201                 if (mod)
 202                         mod = mod + 1;
 203
 204                 pevent_register_function(pevent, func, addr, mod);
 205
 206                 line = strtok_r(NULL, "\n", &next);
 207         }
 208 }
 209
 210 void parse_ftrace_printk(struct pevent *pevent,
 211                          char *file, unsigned int size __maybe_unused)
 212 {
 213         unsigned long long addr;
 214         char *printk;
 215         char *line;
 216         char *next = NULL;
 217         char *addr_str;
 218         char *fmt;
 219
 220         line = strtok_r(file, "\n", &next);
 221         while (line) {
 222                 addr_str = strtok_r(line, ":", &fmt);
 223                 if (!addr_str) {
 224                         warning("printk format with empty entry");
 225                         break;
 226                 }
 227                 addr = strtoull(addr_str, NULL, 16);
 228                 /* fmt still has a space, skip it */
 229                 printk = strdup(fmt+1);
 230                 line = strtok_r(NULL, "\n", &next);
 231                 pevent_register_print_string(pevent, printk, addr);
 232         }
 233 }
 234
 235 int parse_ftrace_file(struct pevent *pevent, char *buf, unsigned long size)
 236 {
 237         return pevent_parse_event(pevent, buf, size, "ftrace");
 238 }
 239
 240 int parse_event_file(struct pevent *pevent,
 241                      char *buf, unsigned long size, char *sys)
 242 {
 243         return pevent_parse_event(pevent, buf, size, sys);
 244 }
 245
 246 struct event_format *trace_find_next_event(struct pevent *pevent,
 247                                            struct event_format *event)
 248 {
 249         static int idx;
 250
 251         if (!pevent || !pevent->events)
 252                 return NULL;
 253
 254         if (!event) {
 255                 idx = 0;
 256                 return pevent->events[0];
 257         }
 258
 259         if (idx < pevent->nr_events && event == pevent->events[idx]) {
 260                 idx++;
 261                 if (idx == pevent->nr_events)
 262                         return NULL;
 263                 return pevent->events[idx];
 264         }
 265
 266         for (idx = 1; idx < pevent->nr_events; idx++) {
 267                 if (event == pevent->events[idx - 1])
 268                         return pevent->events[idx];
 269         }
 270         return NULL;
 271 }
 272
 273 struct flag {
 274         const char *name;
 275         unsigned long long value;
 276 };
 277
 278 static const struct flag flags[] = {
 279         { "HI_SOFTIRQ", 0 },
 280         { "TIMER_SOFTIRQ", 1 },
 281         { "NET_TX_SOFTIRQ", 2 },
 282         { "NET_RX_SOFTIRQ", 3 },
 283         { "BLOCK_SOFTIRQ", 4 },
 284         { "BLOCK_IOPOLL_SOFTIRQ", 5 },
 285         { "TASKLET_SOFTIRQ", 6 },
 286         { "SCHED_SOFTIRQ", 7 },
 287         { "HRTIMER_SOFTIRQ", 8 },
 288         { "RCU_SOFTIRQ", 9 },
 289
 290         { "HRTIMER_NORESTART", 0 },
 291         { "HRTIMER_RESTART", 1 },
 292 };
 293
 294 unsigned long long eval_flag(const char *flag)
 295 {
 296         int i;
 297
 298         /*
 299          * Some flags in the format files do not get converted.
 300          * If the flag is not numeric, see if it is something that
 301          * we already know about.
 302          */
 303         if (isdigit(flag[0]))
 304                 return strtoull(flag, NULL, 0);
 305
 306         for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
 307                 if (strcmp(flags[i].name, flag) == 0)
 308                         return flags[i].value;
 309
 310         return 0;
 311 }